CN114587102B

CN114587102B - Rocking chair back structure and chair

Info

Publication number: CN114587102B
Application number: CN202210309042.8A
Authority: CN
Inventors: 李伟元
Original assignee: Anji Ka Bei Long Furniture Co ltd
Current assignee: Anji Ka Bei Long Furniture Co ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2024-10-08
Anticipated expiration: 2042-03-28
Also published as: WO2023184701A1; CN114587102A

Abstract

The invention relates to the technical field of chairs, in particular to a swaying chair back structure and a chair, which comprise a main support keel, a front support keel and a bottom keel, wherein the front support keel is fixedly connected with a chair seat and used for enabling the main support keel to sway left and right after being installed, a chair back component is installed on the front support keel, a support shaft sleeve which is axially in the front-back direction and can sway left and right after being sleeved on the main support keel is integrally connected on the bottom keel, a swaying sleeve hole which penetrates through the main support keel in the front-back direction and is sleeved on the support shaft sleeve is formed on the main support keel, and a switch device for switching the switch state of the swaying function of the main support keel is arranged between the bottom keel and the main support keel.

Description

Rocking chair back structure and chair

Technical Field

The invention relates to the technical field of chairs, in particular to a rocking chair back structure and a chair.

Background

The existing chair type and structure are the indispensable articles in people's daily life. Particularly for office staff and students with heavy learning, a comfortable decompression chair is indispensable. Many of the chairs in the society are modified, wherein many of the chairs are adjustable and movable, and the chair with the rocking back structure is a relatively rare chair, and the chair has very good relaxing effect for users.

For example, chinese patent application number 201920939364.4 discloses a rocking chair back, including back support, swing mechanism and back frame, back support installs on swing mechanism, back frame installs on back support, swing mechanism includes mount pad, rotating member, spring and support column, back support rotates and installs on the mount pad, the rotating member sets up in the mount pad, and rotating member and back support rotate and be connected, back support is through the rotating member for the pivot swing operation, the support column is provided with two, and two support columns set up respectively in the mount pad and are located the both sides of rotating member, the spring is provided with two, and two springs set up respectively on corresponding support column, and the top and the bottom of two springs support back support and mount pad respectively, and this kind of back of chair can sway side by side, but there are some shortages, the rotating member in this document includes screw rod, sleeve, nut, link up between the bottom and the mount pad, the sleeve is worn to locate in the through-hole, and the sleeve both ends correspond respectively on the mount pad, set up with the sleeve in the through-hole and the nut is passed through with the nut, and is fixed in the cooperation with the screw rod. The structure can be seen that the screw rod is used as a support body of the chair backrest support structure and is used as a structure for swinging the support body and configuring other corresponding auxiliary accessories, but in the use process of the structure, the screw rod is easy to loosen and shift, and the like, and the problems of easy deformation, high noise and the like of other accessories are caused. The structural integrity and comfort may be inadequate.

Disclosure of Invention

The invention aims to provide a swaying chair back structure with better swaying effect.

The technical aim of the invention is realized by the following technical scheme: the utility model provides a but rocking chair back structure, includes the main tributary back fossil fragments the front supporting fossil fragments that main tributary back fossil fragments front side installation is connected with and is used for with seat support fixed connection and supplies after the main tributary back fossil fragments installation can make main tributary back fossil fragments side-to-side sways the end fossil fragments, install the back of the chair subassembly on the front supporting fossil fragments, an organic whole is connected with the axial on the end fossil fragments in the fore-and-aft direction and the supporting axle sleeve that can side-to-side rocking after the main tributary back fossil fragments cover is established, it runs through and overlaps to establish on the main tributary fossil fragments to cover and establish the hole to swing on the supporting axle sleeve, end fossil fragments with be provided with the switching device who is used for switching the on-off state of main tributary back fossil fragments side-to-side rocking function between the main tributary fossil fragments.

As the preference for the invention, the switch device comprises an unlocking hole which is arranged on the main support keel near the bottom part and is vertically arranged, and a locking bolt which is arranged on the bottom keel and can be lifted up and down to finish the closing and opening of the left-right swinging function of the main support keel in a mode of entering and exiting the unlocking hole.

Preferably, the bottom keel is provided with a stay wire which is pulled to enable the locking bolt to descend and separate from the unlocking hole, and an elastic reset device which can enable the locking bolt to ascend into the unlocking Kong Fuwei when the stay wire is retracted.

Preferably, the elastic reset device comprises a swing function switch switching spring sleeved on the locking pin.

As a preferable aspect of the present invention, a latch base for mounting the latch is fixed to the bottom keel, the latch base includes a top base plate, and a left base plate and a right base plate extending downward are respectively fixed to left and right sides of the top base plate, the latch has a top insertion portion inserted upward into the unlocking hole, a limit sleeve for limiting an upper portion of a swing function switch switching spring is fixed to a periphery of a portion of the latch located below the top insertion portion, a lower portion of the swing function switch switching spring is abutted to an upper surface of the top base plate, and the swing function switch switching spring is located between the limit sleeve and the top base plate.

As a preferable mode of the invention, the elastic resetting device further comprises a shifting fork which is positioned between the left side base plate and the right side base plate and is positioned below the top base plate and used for driving the locking bolt to move downwards, one end of the shifting fork is used as a connecting end to be connected with the shifting fork, and the other end of the shifting fork is used as an operating end.

As a preference for the invention, the locking bolt is provided with a lower insertion part which downwards passes through the top base plate and is positioned below the top base plate, the lower insertion part is provided with a poked shaft rod which extends leftwards and rightwards in a penetrating way, the left end of the poked shaft rod is inserted into the left base plate and can move upwards and downwards, the right end of the poked shaft rod is inserted into the right base plate and can move upwards and downwards, the left base plate is provided with a left lifting guide groove which extends upwards and downwards for the insertion and the up-down movement of the left end of the poked shaft rod, the right base plate is provided with a right lifting guide groove which extends upwards and downwards for the insertion and the up-down movement of the right end of the poked shaft rod, the poking fork comprises an upper poked plate which is positioned above the poked shaft rod and can be abutted upwards and downwards with the poked shaft rod, a left claw and a right claw which are arranged at a left-right interval are formed on a position behind the poked plate, the poked shaft rod is positioned between the lower insertion part and the left side base plate and the left base plate and is positioned between the lower base plate and the poked shaft rod insertion part, the poked shaft rod is positioned between the left side base plate and the lower base plate and the poked shaft rod insertion part and the lower base plate and the poked shaft rod is connected with the poked shaft rod part between the upper part and the lower base plate and the poked shaft rod insertion part and the lower base plate and the poked shaft rod part and the poked shaft rod.

As a preferable mode of the invention, the upper end of the dial-down plate is integrally connected with the front end of the dial-up plate, a shift fork driving shaft which extends leftwards and rightwards and is used for the shift fork to rotate is penetrated at the integral connection part, when the left-right swinging function of the main supporting keel is in a closed state, the dial-down plate is inclined backwards and downwards, and the pull wire is positioned in front of the dial-down plate.

As the optimization of the invention, the main support keel is internally provided with the swing reset spring which extends from left to right and is used for buffering and resetting the swing of the main support keel from left to right, and the bottom keel is fixedly provided with the left and right swing blocking limiting rod which penetrates into the main support keel forwards and is blocked into the position between the left end and the right end of the swing reset spring by the front end part.

As a preferable mode of the invention, a spring guide protective sleeve which extends upwards and is used for placing the spring for switching the swinging function switch is integrally connected to the upper surface of the top base plate.

The chair comprises the rocking chair back structure, and further comprises a chair seat which is positioned in front of the bottom keel and fixed with the bottom keel, wherein the chair seat is internally provided with a left-right rocking function adjusting handle which is connected with the operating end of the stay wire and used for pulling and retracting the stay wire.

The invention has the beneficial effects that: the whole chair back swinging structure has better integrity, more stable structure, difficult damage and difficult deformation, and has less noise and better comfort level when in use.

The operation is simpler and more convenient.

Drawings

FIG. 1 is a schematic perspective view of a chair according to embodiment 1;

FIG. 2 is a rear view of the chair back structure of FIG. 1 as it swings to the right;

FIG. 3 is a rear elevational view of the chair back structure of FIG. 1 without rocking;

FIG. 4 is a schematic view showing the assembly of the combined rocking and fore-aft adjustment functions of the chair back of FIG. 1;

FIG. 5 is a schematic view of the interior construction of the main support keel and seat portion of the structure of FIG. 1 after attachment;

FIG. 6 is a schematic perspective view of the seat portion of FIG. 5;

FIG. 7 is a schematic perspective view of the midsole keel of the configuration of FIG. 1, removed from the seat and main support keel;

FIG. 8 is a schematic perspective view of the structure of FIG. 7 from another perspective;

FIG. 9 is a schematic perspective view of a portion of the latch base of the structure of FIG. 8;

FIG. 10 is a schematic view of the internal structure of the structure of FIG. 9;

FIG. 11 is a schematic perspective view of the lower side view of FIG. 9;

FIG. 12 is a schematic perspective view of the structure of FIG. 9 as it is being mounted to a floor runner;

FIG. 13 is a schematic perspective view of the structure of FIG. 9 with the spring guide protective sleeve removed;

Figure 14 is a schematic perspective view of the upper portion of the front support spine of the chair of example 1;

Figure 15 is a schematic perspective view of the underside portion of the front support spine of the chair of example 1;

FIG. 16 is a right side view of the structure of FIG. 1 taken from the right and left middle of the chair in the fore-aft direction;

Figure 17 is a cross-sectional view of the chair construction of example 1 at the bottom keel with the rocking function of the chair back closed;

FIG. 18 is a cross-sectional view of the structure of FIG. 17 with the seat back rocking function open;

figure 19 is a front elevational view of the chair construction of example 1 with the main support keel cut away with the rocking function of the chair back closed;

FIG. 20 is a cross-sectional view of the structure of FIG. 19 with the seat back rocking function open;

FIG. 21 is a right side view of the chair of embodiment 1 with the back of the chair front and back adjustment function part cut away;

figure 22 is a cross-sectional view of the structure of figure 21 with the anterior support keel adjusted anteriorly;

figure 23 is a view of the structure of figure 22 with the upper portion of the anterior support spine adjusted to follow movement;

FIG. 24 is a state diagram showing the back of the chair of example 1 after being deformed by twisting leftwards from the normal state;

FIG. 25 is a state diagram of the back front-rear adjustment function part of the chair of embodiment 1 in the mounting process;

FIG. 26 is a state diagram of the structure of FIG. 25 when further components are mounted;

FIG. 27 is a view of the structure of FIG. 26 with the front side components further installed;

FIG. 28 is a view of the structure of FIG. 27 with the front side components further installed;

fig. 29 is a schematic perspective view showing the headrest structure of the chair of embodiment 1 after being detached;

FIG. 30 is a schematic perspective view of the lower side view of FIG. 29;

FIG. 31 is a perspective view of the disassembled state of the headrest assembly of the structure of FIG. 29;

FIG. 32 is a perspective view of the left and right headrest of the chair of example 1 after horizontal rotation;

FIG. 33 is a state diagram of the structure of FIG. 29 when the upper support beam is adjusted to move forward;

FIG. 34 is a schematic perspective view of the upper support beam of FIG. 33 about to be adjusted to the foremost position;

FIG. 35 is a schematic perspective view of the upper support beam of FIG. 34 in a forward-most position with the spring retainer clip fully collapsed;

FIG. 36 is a schematic perspective view of the upper support beam of FIG. 35 about to be adjusted to a final position;

FIG. 37 is a schematic perspective view of the upper support beam of FIG. 36 in a rearmost position and with the spring retainer clip open to begin operation;

FIG. 38 is a right side elevational view of the upper support beam and headrest assembly rotational connection in the configuration of FIG. 29;

Figure 39 is a right side view of the swivel mount and upper support keel of the construction of figure 29 at the swivel connection;

Figure 40 is a schematic perspective view of the structure of the chair of example 1 with the headrest structural portion connected to the front support spine, cut away;

FIG. 41 is a schematic perspective view of the pivot base support portion of the structure of FIG. 29 with the upper support beam removed;

FIG. 42 is a schematic perspective view of the front side portion of the headrest assembly of the structure of FIG. 29, with the front side portion of the headrest removed;

FIG. 43 is a schematic perspective view of the front headrest base plate of the structure of FIG. 42 after installation;

Fig. 44 is a schematic view showing a perspective structure of the chair of example 1 with the armrest structure detached;

FIG. 45 is a schematic perspective view of the lower view of FIG. 44;

FIG. 46 is a schematic view of the armrest assembly of FIG. 44 with the guide vane moved laterally;

FIG. 47 is a schematic perspective view of the lift adjustment linkage rod of the configuration of FIG. 44 as assembled;

FIG. 48 is a schematic view of a perspective view of the structure of the armrest substrate support plate of FIG. 44 with the upper portion thereof removed;

FIG. 49 is an underside view of the armrest rotational center block of the structure of FIG. 44 with the resilient restraining structure mounted therein;

FIG. 50 is an underside view of the armrest of FIG. 44 with a resilient restraining structure mounted in the armrest fore-and-aft movement adjustment guide mount;

FIG. 51 is a pictorial illustration of the structure of FIG. 44 with different position adjustments of the armrest body;

FIG. 52 is a top view of the structure of FIG. 44 with additional structure assembled at the armrest fore-and-aft movement adjustment limit slot;

FIG. 53 is an assembly view of the armrest side-to-side motion guide and armrest base support plate of the configuration of FIG. 44;

FIG. 54 is an assembly view of the underside of the armrest structure of the structure of FIG. 44;

FIG. 55 is a view of the armrest structure of FIG. 44 in a raised height adjustment;

FIG. 56 is a view of the structure of FIG. 55 when the height of the armrest is adjusted;

FIG. 57 is a schematic view showing a perspective structure of a chair of example 1 at an armrest nipple portion;

FIG. 58 is a schematic view of the chair of example 1 with the armrest structure assembled and cut away at the armrest nipple location;

Fig. 59 is a schematic perspective view showing a disassembled back assembly of the chair of embodiment 1.

Detailed Description

The following specific examples are intended to be illustrative of the invention and are not intended to be limiting, as modifications of the invention will be apparent to those skilled in the art upon reading the specification without inventive contribution thereto, and are intended to be protected by the patent law within the scope of the appended claims.

Embodiment 1, as shown in fig. 1-59, a rocking chair back structure, including main support keel 1, front support keel 2 installed and connected to the front side of main support keel 1 and bottom keel 3 for fixing connection with the chair seat and enabling the main support keel 1 to rock left and right after installation, main support keel 1 and bottom keel 3 can be integrally processed by plastic materials such as aluminum alloy or pp, but front support keel is processed by plastic materials such as pp material or PA plus glass fiber material, because the front support keel needs a certain plasticity for supporting human body on the front side. The front support keel 2 is provided with a chair back component, the chair back component is a structure for leaning on the back of a person directly, the existing chair back leaning structure can also be adopted, the structure in the later embodiment can also be adopted, the bottom keel 3 is integrally connected with a support shaft sleeve 31 which is axially arranged in the front-back direction and can swing left and right after the main support keel 1 is sleeved, the main support keel 1 is provided with a swing sleeved hole 11 which penetrates through the support shaft sleeve 31 in the front-back direction and is sleeved on the support shaft sleeve 31, the supporting shaft sleeve 31 is integrally connected and formed on the supporting structure of the chair foundation on the bottom keel, namely, the bottom keel and the supporting shaft sleeve 31 are integrally formed and produced by the same material, the main supporting keel 1 can rotate directly around the supporting shaft sleeve 31 of the bottom keel to realize the swinging function, the main supporting keel 1 and the front supporting keel 2 are connected back and forth to form an integral chair back structure, and thus, the chair back component is connected to the front supporting keel 2 and can swing left and right together with the main supporting keel 1, thereby realizing the left and right swinging function of the chair back. The supporting shaft sleeve 31 and the bottom keel 3 are integrated, so that the integrity of the whole swing structure is higher, and the using effect is improved.

Of course, a switch device for switching the switch state of the left-right swing function of the main support keel 1, namely a structure of the swing function switch of the chair back, is arranged between the bottom keel 3 and the main support keel 1, so that the chair back can swing when needed, and can be closed when not needed, and the switch device can be selected according to the actual situation of a user.

The specific structure is as follows: the switch device comprises an unlocking hole 101 which is arranged on the main support keel 1 near the bottom and is vertically arranged, and a locking bolt 301 which is arranged on the bottom keel 3 and can be lifted up and down to finish the closing and opening of the left-right swinging function of the main support keel 1 in a mode of entering and exiting the unlocking hole 101. The main supporting keel 1 can be of a long standing keel structure which extends up and down. The bottom keel 3 is preferably an L-shaped keel structure comprising an upright bottom keel upright portion 331 and a recumbent bottom keel recumbent portion 332, the bottom keel upright portion 331 and the bottom keel recumbent portion 332 are integrally formed by connecting together, the support shaft sleeve 31 is integrally formed on the front side portion of the bottom keel upright portion 331, and the front side portion of the bottom keel recumbent portion 332 is fixedly connected with the seat. The integrated connection part of the bottom keel upright part 331 and the bottom keel recumbent part 332 forms an arc-shaped step swinging guide groove 333 positioned below the supporting shaft sleeve 31, the arc-shaped step swinging guide groove 333 is of a downward arc-shaped arched groove body structure, the overall outer contour of the bottom of the main supporting keel 1 is consistent with the shape of the arc-shaped step swinging guide groove 333, the bottom of the main supporting keel 1 is also of a downward arched arc shape, and the bottom of the main supporting keel 1 is as close to the groove bottom of the arc-shaped step swinging guide groove 333 as possible, so that the compactness of the structure is reduced, and the left-right swinging of the main supporting keel 1 is not influenced. However, such a structure is still required to be optimized, and cannot swing without limitation, so that a certain swing limiting structure is required, specifically, the bottom keel is integrally connected with a swing limiting protrusion 334 protruding upwards at a position close to the middle of the bottom of the arc-shaped step swing guiding groove 333, the bottom of the main supporting keel 1 is formed with a swing limiting groove 134 recessed upwards and extending leftwards and rightwards, the swing limiting protrusion 334 is placed into the swing limiting groove 134 upwards, when the main supporting keel 1 swings leftwards and rightwards, the swing limiting protrusion 334 is at a limit position of swinging rightwards and leftwards when touching the left side groove wall or the right side groove wall of the swing limiting groove 134, so that excessive swinging is avoided, and the use safety is ensured, and certainly, the swing limiting protrusion 334 does not influence the smooth swinging when at a position between the left side groove wall and the right side groove wall of the swing limiting groove 134. The unlocking hole 101 is formed in a position above the left-right swing limiting groove 134 of the main supporting keel 1 and is vertically communicated with the left-right swing limiting groove 134, and the unlocking hole 101 is preferably a strip-shaped hole extending forwards and backwards, so that enough allowance is left in the front-back position, and the insertion reliability of the locking bolt 301 is ensured. Meanwhile, the swing limiting protrusion 334 is provided with a corresponding reference hole 3340 which is vertically penetrated and is used for the locking bolt 301 to vertically penetrate and be communicated with the area below the bottom keel, so that the locking bolt 301 can enter the unlocking hole 101 after upwards penetrating through the bottom keel, and particularly, the locking bolt 301 is penetrated and arranged in the lower direction of the integral connection part of the vertical part 331 of the bottom keel and the horizontal part 332 of the bottom keel.

The control of the locking bolt 301 moving up and down can be realized by the following structure: the bottom keel 3 is provided with a stay wire 302 which is pulled to enable the locking bolt 301 to descend and separate from the unlocking hole 101, and an elastic reset device which enables the locking bolt 301 to ascend and enter the unlocking hole 101 to reset after the stay wire 302 is retracted. When the pull wire 302 is pulled, the locking bolt 301 descends, the swinging function is started, and after the pull wire is loosened, the elastic reset device can elastically lift the locking bolt 301 upwards, so that the locking bolt 301 is inserted into the unlocking hole 101 upwards to close the swinging function. Further, the elastic restoring means includes a rocking function switch switching spring 303 fitted over the lock pin 301. Specific application cases: the bottom keel 3 is fixed with a bolt base 4 for installing the locking bolt 301, the bolt base 4 is fixed at a lower side portion of an integral connection portion of the locking bolt 301 located at the bottom keel upright portion 331 and the bottom keel horizontal portion 332, the bolt base 4 comprises a top base plate 41 and a left base plate 42 and a right base plate 43 which are respectively fixed at the left side and the right side of the top base plate 41 and extend downwards, the top base plate 41, the left base plate 42 and the right base plate 43 of the bolt base 4 can be of a structure manufactured by plastic integral molding, and the bolt base 4 can be fixedly connected with the bottom keel 3 through existing fixing modes such as screw threaded connection, glue bonding and the like. The locking bolt 301 has a top insertion portion 3011 that is inserted upward into the unlocking hole 101, a limit sleeve 3012 for limiting the upper portion of the rocking function switch-switching spring 303 by abutting is fixedly sleeved on the periphery of the portion of the locking bolt 301 below the top insertion portion 3011, the locking bolt 301 and the limit sleeve 3012 may be made of steel and may be fixed by conventional fixing means such as integral casting or welding, the lower portion of the rocking function switch-switching spring 303 abuts against the upper surface of the top substrate 41, and the rocking function switch-switching spring 303 is located between the limit sleeve 3012 and the top substrate 41. The lower portion of the rocking function switch-switching spring 303 may also abut against the upper portion of the dial-up plate 441 or the upper portion of the left toggle grip 4411 and the right toggle grip 4412 of the dial-up plate 441, which will be mentioned later, but it is preferable that the rocking function switch-switching spring 303 is contracted during the lowering of the lock pin 301 because the dial-up plate 441 is deflected downward, that is, has a lower component, which is required to be smaller than the lock pin 301, and the rocking function switch-switching spring 303 is not compressed and reset, so that the lower portion of the rocking function switch-switching spring 303 abuts against a relatively fixed portion inside or outside the pin base 4 as much as possible.

In order to better use the pull wire, the following design is made: the elastic resetting device further comprises a shifting fork 44 which is positioned between the left base plate 42 and the right base plate 43 and positioned below the top base plate 41 and used for driving the locking bolt 301 to move downwards, one end of the pulling wire 302 is used as a connecting end 3021 to be connected with the shifting fork 44, the other end of the pulling wire 302 is used as an operating end 3022 to form a lever structure, pulling is easier, and thus the operating end 3022 can extend into a seat to facilitate operation of a user.

More specifically, the locking pin 301 has a lower insertion portion 3013 penetrating downward through the top substrate 41 and below the top substrate 41, a left-and-right extending shaft 30133 is inserted into the left substrate 42 and can move up and down by the lower insertion portion 3013, a right end of the shaft 30133 is inserted into the right substrate 43 and can move up and down by the shaft 30133, a left elevation guide groove 421 extending up and down for the left end of the shaft 30133 to be inserted and moved up and down is provided in the left substrate 42, a right elevation guide groove 431 extending up and down for the right end of the shaft 30133 to be inserted and moved up and down is provided in the right substrate 43, The fork 44 includes an up-pulling plate 441 located above the pulled shaft 30133 and capable of abutting up and down against the pulled shaft 30133, a left pulling grip 4411 and a right pulling grip 4412 are formed on a rear portion of the up-pulling plate 441 in a left-right spaced arrangement, the left pulling grip 4411 is located between the lower insertion portion 3013 and the left base plate 42 and above a portion of the pulled shaft 30133 located between the lower insertion portion 3013 and the left base plate 42, and the left pulling grip 4411 is capable of abutting up and down against a portion of the pulled shaft 30133 located between the lower insertion portion 3013 and the left base plate 42, The right toggle claw 4412 is located between the lower insertion portion 3013 and the right side substrate 43 and above the portion of the toggled shaft 30133 located between the lower insertion portion 3013 and the right side substrate 43, and the right toggle claw 4412 can abut against the portion of the toggled shaft 30133 located between the lower insertion portion 3013 and the right side substrate 43 up and down, and the fork 44 further includes a toggle plate 442 located below the toggle plate 441 and integrally connected to the toggle plate 441, and the toggle plate 442 is connected to the connection end 3021 of the wire 302 at a lower end portion. In this structure, the locking bolt 301 can be more stably lowered to start the swinging function by pulling the pull wire 302, the pull wire 302 is loosened, the pull wire 302 is retracted to elastically reset, and the locking bolt 301 is lifted to close the swinging function. Further preferably, the upper end of the dial-down plate 442 is integrally connected with the front end of the dial-up plate 441, and a fork driving shaft 443 extending from left to right for the fork 44 to rotate is provided at the integral connection, the left and right ends of the fork driving shaft 443 are respectively mounted on the left and right base plates 42 and 43, and corresponding hole structures are required to be provided on the left and right base plates 42 and 43 for positioning and mounting the fork driving shaft 443, so that the fork 44 can be better used as a transfer structure to realize switching of the swinging function by rotation. Here, when the left-right rocking function of the main supporting keel 1 is in the closed state, the dial-down plate 442 is inclined backward and downward, and the pull wire 302 is located in front of the dial-down plate 442, then if the pull wire is pulled forward, the pull wire 302 drives the shift fork forward to rotate, the dial-down plate 442 is deflected forward, the dial-down claw can dial down the dial-down shaft 30133 to move downward and drive the locking bolt 301 to descend, so that the chair back rocking function can be opened, and once the pull wire is loosened, the locking bolt 301 is elastically reset upward, so as to close the chair back rocking function.

The swing return spring 1000 which extends from left to right and is used for buffering and resetting the swing of the main support keel 1 is arranged in the main support keel 1, the bottom keel 3 is fixedly provided with a swing blocking limiting rod 1001 which penetrates into the main support keel 1 forwards and is blocked into a position between the left end and the right end of the swing return spring 1000 by the front end part, the main support keel 1 is provided with a spring cabin 1002 which extends from left to right and is sealed at the left side and the right side and is used for embedding the swing return spring 1000, the spring cabin 1002 can be directly formed on the main support keel 1 or can be embedded and fixed on the main support keel 1 through an embedding piece which is provided with the spring cabin 1002, The insert may be integrally formed by plastic, and the left and right side walls of the spring housing 1002 are preferably integrally connected with a positioning protrusion for inserting the left end of the swing return spring 1000 and a positioning protrusion for inserting the right end of the swing return spring 1000, respectively, so as to ensure good positioning of the left and right sides of the swing return spring 1000, the left and right swing blocking stop lever 1001 is preferably clamped in a position near the center between the left end and the right end of the swing return spring 1000, so that the swing return spring 1000 is divided into two sections, one section is between the left side wall of the spring housing 1002 and the left and right swing blocking stop lever 1001, The left and right sides of the spring cabin 1002 are left and right along with the main supporting keel, so when the main supporting keel swings left and right, the right section of the swing reset spring 1000 is compressed, the buffer and reset effects are provided, if the main supporting keel swings right, the left section has corresponding effects, and when the main supporting keel does not apply force to a human body, The main supporting keel will return to the middle position left and right, where, because the position of the left and right blocking limiting rod 1001 is motionless and the main supporting keel will swing left and right, the hole of the main supporting keel through which the left and right blocking limiting rod 1001 passes is left and right extended, so that the left and right swing of the main supporting keel is not blocked by the left and right blocking limiting rod 1001, so the main supporting keel has a avoiding hole 1003 in the middle position of the spring cabin 1002, the avoiding hole 1003 is waist-shaped or fan-shaped to match the left and right swing of the main supporting keel, for example, we prefer that the left and right blocking limiting rod 1001 is arranged above the supporting shaft sleeve 31, That is, at a position above the swing center, the avoidance hole 1003 is preferably an upward arc-shaped fan-shaped ring hole, because the main support keel is located at the position of the avoidance hole 1003 and swings circumferentially along the upper half circumferential path formed by the radius from the left-right swing blocking stop lever 1001 to the center of the support shaft sleeve 31, the avoidance hole can be well matched with the left-right swing blocking stop lever 1001. In the closed state of the swing function or in the initial state after the swing function is started, the left-right swing blocking limit rod 1001, the unlocking hole 101 and the locking bolt 301 are all arranged at positions close to the center left and right as much as possible, so that the symmetry and stability of the left-right structure are ensured. During installation, a circular wear-resistant ring can be sleeved in the swing sleeving hole 11, and then the supporting shaft sleeve 31 is sleeved in the wear-resistant ring. In addition, the front surface of the bottom keel vertical part 331 is attached to the back of the main supporting keel as much as possible, ensuring the compactness of the structure, and the abrasion-resistant washer or gasket can be clamped between the front surface of the bottom keel vertical part 331 and the back of the main supporting keel, so as to reduce the abrasion when the chair back swings.

Preferably, the upper surface of the top substrate 41 is integrally connected with a spring guide protecting sleeve 3033 extending upwards and used for placing the swing function switch switching spring 303, so that the swing function switch switching spring 303 has better guiding and protecting functions, the swing limiting protrusion 334 is provided with a protecting sleeve embedded groove 33033 extending upwards from the bottom of the swing limiting protrusion and communicated with the reference hole 3340, the spring guide protecting sleeve 3033 can be inserted into the protecting sleeve embedded groove 33033, and the spring guide protecting sleeve 3033 can be assembled and connected onto the bottom keel with the locking bolt 301 better during installation without affecting the lifting of the locking bolt 301.

Of course, the above-described embodiments are comparatively optimized cases. There are many ways to implement the inventive concept. For example, the pull wire 302 may be directly connected to the lower portion of the locking bolt 301.

Based on the above structure, this embodiment further provides a chair, including the aforementioned rocking chair back structure, and further including a seat z located in front of the bottom keel 3 and fixed with the bottom keel 3, in which a left-right rocking function adjusting handle z1 connected with an operation end 3022 of the pull wire 302 and used for pulling and retracting the pull wire 302 is provided, which may be in an existing structure, and is convenient for a user to operate, for example, the left-right rocking function adjusting handle z1 adopts a handle moving left and right, so that the left end of the left-right rocking function adjusting handle z1 is located in the seat and connected with the operation end 3022 of the pull wire 302, The right end of the left-right swing function adjusting handle z1 extends out of the seat for a user to pull, and the right end part of the left-right swing function adjusting handle z1 can be of a sheet structure which is convenient for the left-right push-pull of the hand and is exposed outside the seat. the seat is internally provided with a plurality of stay wire guiding grooves z2, and stay wires are led to the left end of the left-right swinging function adjusting handle z1 in the guiding grooves and are connected. The inside of the chair seat is also provided with a transverse push-pull guide groove z3 for guiding the push-pull movement of the left-right rocking function adjusting handle z1, the front and rear groove walls of the transverse push-pull guide groove z3 are respectively provided with a chair back rocking function closing gear groove z31 and a chair back rocking function opening gear groove z32 which are distributed at intervals left and right, the front and rear sides of the left-right rocking function adjusting handle z1 are respectively connected with a clamping elastic piece z33 which protrudes forwards and a clamping elastic piece z33 which protrudes backwards, the clamping elastic piece z33 at the front side is matched with the chair back rocking function closing gear groove z31 at the front side and the chair back rocking function opening gear groove z32, the clamping elastic piece z33 at the rear side is matched with the chair back rocking function closing gear groove z31 at the rear side and the chair back rocking function opening gear groove z32, The elastic piece z33 for clamping is preferably an arc sheet body structure with deformation capability, the gear groove z31 for closing the rocking function of the chair back and the gear groove z32 for opening the rocking function of the chair back are preferably arc groove body structures, the elastic piece z33 for clamping is clamped in the gear groove z31 for closing the rocking function of the chair back at the beginning, at the moment, the stay wire is not pulled, the stay wire is in a balanced state pulled by an elastic reset device, the locking bolt 301 is inserted into the unlocking hole 101, the rocking function of the chair back is closed, when the handle z1 for adjusting the rocking function of the chair back is pulled rightwards, the operating end of the stay wire is pulled rightwards and acts on the connecting end to enable the shifting fork 44 to act to drive the locking bolt 301 to descend, Meanwhile, the elastic piece z33 for clamping moves right together and enters the gear groove z32 for opening the rocking function of the chair back to clamp, and the locking bolt 301 is downwards separated from the lock hole 101, so that the rocking function of the chair back is opened, and at the moment, the chair back can swing left and right. When the left-right rocking function adjusting handle z1 is pushed back to the left, in this process, the pull wire is in a relaxed state after being retracted, and then the rocking function switch switching spring 303 of the elastic resetting device resets and opens from a compressed state when the rocking function is opened, so that the locking bolt 301 is reinserted into the unlocking hole 101, and at this time, the elastic piece z33 for clamping is clamped into the chair back rocking function closing gear groove z31. In order to have fine guard action to whole structure, still be provided with in the seat support and slow down the rocking function that rocking function adjustment handle z1 moved right and open the rocking function and open buffer spring z34, rocking function opens buffer spring z34 and extends about, and it can the left end be connected to on the rocking function adjustment handle z1, and the right-hand member is connected with the structure in the seat support, and such effect is in opening and has the cushioning effect, just so can not pull out whole starting structures such as acting as go-between, shift fork, and the laborsaving effect of reset when closing.

Through foretell structural design for the function of swaing of back of the chair is further optimized, not only easy operation is convenient laborsaving, and structural stability is better when swaing, and it is also more comfortable to use, more does benefit to put and releases the decompression.

Embodiment 2, referring to the drawings in embodiment 1, a rocking chair back structure of this embodiment is a further optimization of the structure of embodiment 1, and can be used on the basis of the structure of embodiment 1, that is, the structural features of the embodiment can be applied to this embodiment, and of course, the structure of this embodiment can also be applied to chairs of other structures separately.

The swinging chair back structure comprises a main support keel 1, a front support keel 2 and a bottom keel 3, wherein the front support keel 2 is fixedly connected with a chair seat and is used for enabling the main support keel 1 to swing left and right after being installed, a chair back component is installed on the front support keel 2, a support shaft sleeve 31 which is axially arranged in the front-back direction and can swing left and right after being sleeved on the main support keel 1 is arranged on the bottom keel 3, a swinging sleeved hole 11 which penetrates through and is sleeved on the support shaft sleeve 31 in the front-back direction is formed on the main support keel 1, a front-back position adjusting rotating shaft 5 which extends forwards and backwards and is used for adjusting the front-back position of the front support keel 2 relative to the main support keel 1 is arranged in the support shaft sleeve 31 in a penetrating way, The rear end of the front-rear position adjusting rotating shaft 5 penetrates the bottom keel 3 backwards and is fixedly connected with a hand wheel 51, the hand wheel 51 rotates to enable the front-rear position adjusting rotating shaft 5 to rotate, the axial direction of the front-rear position adjusting rotating shaft 5 is in the front-rear direction, the front end of the front-rear position adjusting rotating shaft 5 penetrates the bottom keel 3 forwards and penetrates the swinging sleeving hole 11 at the same time, namely, the front-rear position adjusting rotating shaft 5 penetrates the bottom keel 3 forwards and penetrates the inner space of the supporting shaft sleeve 31, the swinging sleeving hole 11 is sleeved on the periphery of the supporting shaft sleeve 31, the front-rear position adjusting rotating shaft 5 can penetrate the main supporting keel 1, and accordingly the front end of the front-rear position adjusting rotating shaft 5 can penetrate the main supporting keel 1 forwards to serve as a control component. The method comprises the following steps: the front-rear position adjusting rotating shaft 5 is positioned in front of the swing sleeving hole 11 as a driving end part 50, a driving gear set is installed and connected on the driving end part 50, a connecting rotating shaft 52 which extends forwards and can extend forwards into the bottom part of the front supporting keel 2 is also installed and connected on the driving gear set, the front-rear position adjusting rotating shaft 5 is used as an input end part of the driving gear set, the connecting rotating shaft 52 is used as an output end part of the driving gear set, the outer surface of the connecting rotating shaft 52 is provided with an external thread 521, a front supporting keel bottom inner cavity 21 which extends forwards from the rear is arranged in the bottom part of the front supporting keel 2 and is used for the connecting rotating shaft 52 to extend forwards, The front support keel bottom cavity 21 is integrally connected with a driving threaded sleeve 22 which extends forwards and backwards and enables the connecting rotating shaft 52 to extend forwards and then be connected by threads and move forwards and backwards, and the driving threaded sleeve 22 is internally provided with an internal threaded hole 221 which penetrates forwards and backwards and is matched with an external thread 521 of the connecting rotating shaft 52. In the above-mentioned structure, the front-rear position adjusting shaft 5 drives the driving end portion 50 to rotate by rotating, the driving end portion 50 rotates to drive the driving gear set, the driving gear set can adopt the existing gear box structure or a more practical structure provided in the embodiment described later, mainly for realizing transmission effectiveness and saving effort, the gear set is connected with the connecting shaft 52, the connecting shaft 52 is also driven to rotate, the outer surface of the connecting shaft 52 is provided with the external screw 521, so that the connecting shaft 52 can be nested and matched with the internal screw hole 221, and through rotating clockwise or anticlockwise rotation, the connecting shaft 52 can be connected with the driving screw sleeve 22 through the matching of the screw threads, The adjustment of the front and rear positions of the driving screw sleeve 22 can be realized through rotation, the adjustment of the front support keel 2 and the front and rear positions of the chair back component which is arranged on the front support keel 2 and is directly leaned against by the back of a person can be finished, the front and rear positions of the chair back component are fixedly connected when the rotation is stopped, the main operation is that the connecting rotating shaft 52 correspondingly rotates anticlockwise and clockwise through clockwise rotation or anticlockwise rotation of a hand wheel, the position of the connecting rotating shaft 52 can be ensured to be immovable back and forth after being arranged on a driving gear set, namely the axial direction of the connecting rotating shaft 52 is limited and locked and immovable, the axially immovable connecting rotating shaft 52 can be rotated to enable the driving screw sleeve 22 to move back and forth on the connecting rotating shaft 52, Of course, when the chair is manufactured and installed, the connecting shaft 52 may be first threaded to connect the part with the external thread 521 and the driving thread sleeve 22, in addition, the connecting shaft 52 may not be entirely externally threaded, but may be mainly provided at the front section thereof, but it is ensured that the section of external thread is enough to drive the thread sleeve 22 to move back and forth without disengaging, and of course, the front support keel 2 itself needs to be provided with a certain position limiting structure to prevent the front and back position adjustment from being not controlled and affecting the use.

It can be seen from the above structure that the design of the supporting sleeve 31 not only is to set up the main supporting keel at the periphery for swinging the chair back, but also can realize the adjustment of the front and back positions of the chair back by penetrating the front and back position adjusting rotating shaft 5 in the supporting sleeve 31, and through such an intermediate transition structure, the whole chair structure is connected in series, so that the whole chair structure is better in integrity and more compact, and in addition, the supplement is needed, for example, in the case of not penetrating the front and back position adjusting rotating shaft 5 in the middle, or in the case that the supporting sleeve 31 is only used for realizing the swinging function, the sleeve of the supporting sleeve 31 can be filled with a solid shaft, namely, in the case that the supporting sleeve 31 is equivalent to the solid shaft, all fall into the protection scope of the application.

Preferably, the driving gear set includes an upper gear 501 mounted on the driving end portion 50 and a lower gear 502 mounted on the rear end portion of the connection shaft 52, the upper gear 501 and the lower gear 502 are disposed up and down and engaged, and the diameter of the upper gear 501 is larger than that of the lower gear 502. The upper gear 501 may be connected to the driving end portion 50 of the front and rear position adjustment shaft 5 by the existing mounting manner, for example, by mounting and connecting the upper gear 501 to the driving end portion 50 of the front and rear position adjustment shaft 5 by a spline assembly manner, and is mainly positioned in the circumferential direction, however, in the existing gear mounting manner, the axial positioning is also preferred, and the structures such as snap spring positioning, shaft shoulder positioning, step positioning, retainer ring positioning or shaft sleeve positioning are assembled on the front and rear side of the upper gear 501 in the axial direction, so that the space between the upper gear 501 and the front and rear position adjustment shaft 5 is relatively static, the effectiveness of transmission is ensured, and likewise, the lower gear 502 is fixedly connected to the connecting shaft 52 by the above mounting manner, and the diameter is set to save labor. The structure through two axles is more optimized like this, of course, can only with front and back position adjustment pivot 5 and set up the screw thread and drive screw sleeve 22 direct cooperation on front and back position adjustment pivot 5, also need not use gear drive structure, but such structure operation is very laborious, in addition, need the spacing to keep the stability of front and back position adjustment pivot 5 front and back position to the front and back side of main support fossil fragments 5 under this kind of circumstances, there is axial great pressure, just the epaxial structure of axial spacing and main support fossil fragments produce great extrusion force, can make the manual rotation more laborious. Of course, although the stability of the front and rear positions of the front and rear position adjustment rotating shaft 5 should be ensured as much as possible under the above-mentioned two-shaft structure, in addition, for smooth rotation, in this embodiment, a round and smooth rear pressing plate h2 located between the hand wheel and the rear side portion of the main supporting keel and a round and smooth front pressing plate h1 located between the front side portion of the main supporting keel and the upper gear 501 may be installed on the front and rear position adjustment rotating shaft 5, the hand wheel is installed and fixed at the rear end of the front and rear position adjustment rotating shaft 5 and abuts against the rear pressing plate h2 axially, and the upper gear 501 is installed and fixed at the front end of the front and rear position adjustment rotating shaft 5 and abuts against the front pressing plate h1, so as to maintain the stability of the driving structure and facilitate rotation.

In order to further enhance the usability of the connection shaft 52, the lower gear 502 is first fixedly mounted on the connection shaft 52, and it is mentioned that the lower gear 502 is required to be axially and circumferentially limited, particularly, in the axial direction, the shaft of the connection shaft 52 may be directly stepped and abutted against the front side of the lower gear 502, the shaft of the connection shaft 52 may be provided with a bearing k on the rear side of the lower gear 502, a circular insertion groove is formed on the front side portion of the main support keel 1 for inserting the bearing k, preferably the rear end portion of the connection shaft 52 passes through the bearing k backwards and the rear side portion of the lower gear 502 near the position sleeved with the connection shaft 52 is axially abutted against the front side portion of the inner ring of the bearing k, thus making the rotation adjustment process smoother, and on the other hand, the front and rear positions of the connection shaft 52 are ensured to be stable, so as to ensure the connection stability with the front support keel, a round and smooth shaft end rear positioning ring 555 which can be propped against the rear side part is arranged on the rear side part of the main support keel 1, a shaft end positioning bolt 556 is penetrated in the front and rear axial direction of the shaft end rear positioning ring 555, the screw head of the shaft end positioning bolt 556 is propped against the rear side of the shaft end rear positioning ring 555, the screw rod part of the shaft end positioning bolt 556 forwards penetrates through the main support keel 1 and can be connected with the rear end part of the connecting rotating shaft 52, an inner positioning screw hole which is screwed and fixed by the screw rod part of the shaft end positioning bolt 556 with the front concave rear end surface is arranged in the rear end part of the connecting rotating shaft 52, the installation mode is that the rear end part of the connecting rotating shaft 52 does not need to backwards penetrate through the main support keel 1, the installation mode is also provided that the rear end part of the connecting rotating shaft 52 backwards penetrates through the main support keel 1, the rear end part of the connecting rotating shaft 52 is directly sleeved with a rear positioning ring 555 of the fixed shaft end, and in this way, the inner ring of the rear positioning ring 555 of the shaft end and the outer surface of the rear end part of the connecting rotating shaft 52 need to form corresponding thread structures, and the inner ring and the outer surface of the rear end part of the connecting rotating shaft 52 are fixed in a sleeved and threaded connection mode. The two modes can stabilize the front and rear positions of the connecting rotating shaft 52, and the connecting rotating shaft 52 only rotates but does not move back and forth in the operation process of the front and rear position adjusting rotating shaft 5, so that the front and rear positions of the front support keels 2 are changed, and the front and rear positions of the most effective and stable chair back components are achieved.

Preferably, the front side cover of the main supporting keel 1 is combined with a driving gear set protecting cover 53 which can cover the upper gear 501 and the lower gear 502, the driving gear set protecting cover 53 can be a plastic cover or an aluminum alloy cover, and can be mounted on the main supporting keel 1 through a fastening structure or a mounting mode such as a screw structure, and mainly plays a role of protecting all parts of the driving gear set part inside, in addition, when the front side part of the main supporting keel 1 is provided with a spring cabin 1002, under the condition that the bin opening of the spring bin 1002 faces forward, the swing reset spring 1000 is exposed and has the risk of being separated after being placed in the spring bin 1002, the driving gear set protection cover 53 can cover the bin opening of the spring bin 1002 and block the swing reset spring 1000 at the front side so as to seal the swing reset spring 1000 in the spring bin 1002, the swing reset spring 1000 follows the compression and expansion actions caused by the fact that a chair back swings left and right as much as possible, the effectiveness of swing and the stability of the structure are guaranteed, and unnecessary disturbance is reduced. The bottom part of the front supporting keel 2 is a front supporting keel bottom inserting part 20 protruding backwards, the front side surface of the driving gear set protecting cover 53 is integrally connected with a sleeve pipe 531 which extends forwards and is communicated with the area covered by the driving gear set protecting cover 53 and is used for inserting the front supporting keel bottom inserting part 20 backwards, the front supporting keel bottom inserting part 20 can be sleeved with the sleeve pipe 531 forwards and backwards, the periphery of the connecting rotating shaft 52 is provided with an outer protecting structure and is connected with the sleeve pipe 531, and therefore the integrity and the protecting performance of the whole structure are better. The ferrule 531 and the front support keel bottom plug portion 20 may be rectangular in configuration and are practical in terms of strength and manufacturing and installation. Then, the front support keel bottom cavity 21 is disposed in the front support keel bottom inserting portion 20, and the front support keel bottom cavity 21 is formed by recessing the front support keel bottom inserting portion 20 by extending backward and forward, of course, the ferrule 531 and the front support keel bottom inserting portion 20 can both be provided for the connection shaft 52 to extend forward, so that the connection shaft 52 is provided with the ferrule 531 outside, and the ferrule 531 is provided with the front support keel bottom inserting portion 20 outside, which is more optimized in terms of structure.

Preferably, the main support runner 1 is further provided with an outer protective sheath 54 that covers the drive gear set protective cover 53 and the ferrule 531. The protection and the aesthetic degree of the outside are further improved, the driving gear set protecting cover 53 and the sleeve 531 are integrally connected as described above, then, the appearance of the outer protecting cover 54 is similar to the integral structure formed by the driving gear set protecting cover 53 and the sleeve 531 as much as possible, and may be generally in an L-shaped structure, but the front side surface and the peripheral part of the outer protecting cover 54 may be modified better, and may be in a more streamline structure, because the shape of the details of the driving gear set protecting cover 53 may form corresponding convex and concave structures for adapting due to the structures such as gears and springs in the covered position, and in addition, it is important that the front end of the front-rear position adjusting rotating shaft 5 generally exceeds a part of the upper gear to be used for better mounting and axially positioning the upper gear, at this time, the part of the front-rear position adjusting rotating shaft 5 exceeds the driving gear set protecting cover 53 to ensure the compactness of the internal structure, and the front end of the front-rear position adjusting hole 5 needs to penetrate into the protecting cover for avoiding the internal structure, and the front end of the front-rear position adjusting rotating shaft 5 can be better exposed through the protecting cover 54. The outer protective sheath 54 is preferably secured to the main support keel 1 by conventional snap fit and the like. Both the drive gear set protective cover 53 and the outer protective cover 54 may be made of plastic material, such as PA6+33% fiberglass plastic.

In addition, for better fore-and-aft adjustment, a guiding post 222 extending backward into the inner cavity 21 of the bottom of the front support keel and near the front side of the connecting rotating shaft 52 is embedded in the front side part of the bottom inserting part 20 of the front support keel, a guiding groove extending forward and backward is formed in the front end part of the connecting rotating shaft 52, and the guiding post 222 for fore-and-aft adjustment can be inserted and matched backward by the guiding groove, so that the fore-and-aft guiding of the connecting rotating shaft 52 is more stable, and the structural firmness is better. Also, the front-rear position adjusting shaft 5 and the connecting shaft 52 are extended forward and backward and slightly raised forward and upward by a certain angle, and are controlled to be within 10 degrees or even within 5 degrees as much as possible, because the seat itself is slightly raised by a certain angle for comfort in use.

Preferably, the front support keel 2 has a middle arc support section 23 formed with a forward arc arch in the portion above the front support keel bottom inserting part 20, which improves the strength of the forward support because the waist of the human body is leaning backward, and the structure is more optimized.

Further, in the above-mentioned structure, the front support runner 2 is connected to the main support runner 1 through a bottom structure, if there is only the connection, the whole support structure is unstable, and the restriction on the front and rear positions of the front support runner 2 is insufficient, so that further optimization is required as follows:

The part of the front support keel 2 above the middle arc-shaped support section 23 is used as an upper side adjusting connecting section 24, and the upper side adjusting connecting section 24 is movably connected with the main support keel 1 in a front-back mode. By connecting the upper front support keels 2 and the main support keels 1, the strength of the connection between the front and the back can be ensured, the stability is improved, and the connection between the upper front support keels 2 and the main support keels is a connection structure which is preferably movable to adapt to the lower front and the back adjustment as the bottom structure of the front support keels 2 is adjusted and moved back and forth. On this basis, specifically, the rear side of the upper side adjusting connection section 24 is fixedly connected with an upper support reinforcing connection shaft rod 251 which extends backwards, the upper support reinforcing connection shaft rod 251 is connected with the main support keel 1 through a universal connection mechanism, the universal connection mechanism can adopt the existing universal joint structure, but is applied to a chair, a complex mechanical structure is not needed, and a simpler universal structure can be adopted, as follows:

The universal connecting mechanism comprises a universal ball head 252 fixed at the rear end of the upper support reinforcing connecting shaft rod 251 and a ball cage 19 arranged on the main support keel 1 and used for being connected with the universal ball head 252 in an installation mode, a movable inner bin 191 used for enabling the universal ball head 252 to move after being placed in is formed in the ball cage 19, an inner bin outlet 192 of the movable inner bin 191 is opened forwards, the diameter of the inner bin outlet 192 is smaller than that of the universal ball head 252, a part of the universal ball head 252 is exposed out of the movable inner bin 191 forwards, and the diameter of the rear end of the upper support reinforcing connecting shaft rod 251 is smaller than that of the inner bin outlet 192. The inner bin outlet 192 is preferably a circular outlet, and by the above-mentioned dimensions, the upper support reinforcing connecting shaft 251 can flexibly run around the ball cage 19, and the ball cage 19 is preferably a structure which can be spliced and fixed, for example, the main body part of the ball cage 19 is formed on the main support keel 1, but the rear side of the main body part is not closed, and the ball cage is closed on the rear side of the main support keel 1 by a rear ball cage cover 190 through a detachable structure such as screws, etc., so that the upper support reinforcing connecting shaft 251 is mounted and fixed on the front and rear sides by passing the ball cage and the inner bin outlet 192 forwards from the unsealed position on the rear side of the ball cage, and the universal ball head 252 can be put into the ball cage from the rear to the front, because the upper support reinforcing connecting shaft 251 and the universal ball head 252 are mounted by adopting an integrally connected structure, and the upper support reinforcing connecting shaft 251 and the universal ball head 252 are mounted by adopting an integrally formed plastic shaft, for example, a plastic shaft is manufactured by adopting a POM. The joint structure of the universal joint is always connected, the adjustment of the front and rear positions of the bottom of the front support keel 2 is effectively limited, and the plasticity of the keel and the plastic connecting piece is limited, for example, under the condition that the bottom of the front support keel 2 moves a lot before, the front support keel and the upper universal joint part cannot meet the deformation capability required by overlarge forward movement component, and the limitation of the front and rear adjustment is good.

Through the design of above-mentioned structure, just can just make the back of the chair not only swing side by side, can also make back of the chair subassembly adjust from beginning to end, satisfy user's different demands, the operation is also simpler, as long as just can easily adjust front and back position through the hand wheel, and the operation is also very convenient also can be seen through embodiment 1 to the function of swaing side by side to the compatibility of both functions is better, makes overall structure's compactness and intensity all obtain promoting better.

Of course, based on the above-mentioned rocking chair back structure, the present embodiment also provides a chair including the rocking chair back structure as described above, and the rocking chair back structures mentioned in embodiments 1 and 2 can be used in combination.

Embodiment 3 referring to the drawings in embodiment 1, a headrest structure of this embodiment can be applied to the chair structures mentioned in embodiments 1 and 2, and can be used with a rocking chair back structure or the like on the same chair, with better effect.

Specifically, the headrest structure of this embodiment includes the upper support keel 6 that is used for installing and connecting on the front support keel 2 and is upright form, upper support keel 6 is upright form and can pass through plastics material integrated into one piece, upper end portion of upper support keel 6 is connected with around upper support keel 6 rotates and is the upper support beam 61 of form of lying on one's back, namely upper support keel 6 and upper support beam 61 are the rotation connection, upper support beam 61's front side portion is connected with and can rotate around upper support beam 61 and be used for the headrest body subassembly that the head leaned on, upper support beam 61 and headrest body subassembly also are the rotation connection, further, the rotation seat 62 that is used for with upper support keel 6 is connected to the downside of upper support beam 61, and upper support beam 61 and upper support keel 6's rotation connection is through rotation seat 62 connection, and upper support beam 61 can carry out fore-and-aft position adjustment along rotation seat 62, and upper support beam 61 can not only rotate from top to bottom for the holistic angle of headrest body subassembly obtains rotation adjustment, upper support beam 61 and headrest body subassembly also is the rotation adjustment, and the headrest body subassembly can be followed by the rotation adjustment of the headrest body subassembly is still can be more comfortable by the pillow body subassembly about the rotation position of the head rest on the head rest, and the pillow body subassembly is still can be adjusted by the pillow body more than the choice.

Specifically, a left rack 601 and a right rack 602 are formed at the lower part of the upper support beam 61 at left and right intervals and symmetrically, the left rack 601 is provided with a plurality of left inverted teeth 6011 which are arranged in a front-back continuous manner and incline to the right and form a left inverted tooth limit groove 60111, the right rack 602 is provided with a plurality of right inverted teeth 6021 which are arranged in a front-back continuous manner and incline to the left and rear and form a right inverted tooth limit groove 60211, a positioning pile 621 which extends upwards is mounted in the rotating seat 62, an elastic positioning clip 622 for adjusting the front-back position of the upper support beam 61 is sleeved on the positioning pile 621, and the elastic positioning clip 622 comprises a clip return spring 6220 which is respectively matched with the left inverted tooth limit groove 60111 and the right inverted tooth limit groove 60211 so as to enable the left and right clip parts of the upper support beam 61 to be adjusted and limited in the front-back direction and a left and right clip part which extends left and right clip part is arranged between the left clip part and right side part. In this structure, the elastic positioning clip 622 is mounted and positioned on the rotating seat 62, the elastic positioning clip 622 will not translate back and forth relative to the rotating seat 62, the elastic positioning clip 622 is moved back and forth relative to the upper support beam 61, and the elastic positioning clip 622 is positioned at the interval between the left side rack 601 and the right side rack 602, or at the interval between the left side pawl limiting groove 60111 and the right side pawl limiting groove 60211, that is, the lower side of the upper support beam 61 forms a clip channel 661122 for placing the elastic positioning clip 622 at the interval between the left side rack 601 and the right side rack 602, because of the arrangement of racks and corresponding pawl limiting grooves on both sides of the clip channel 661122, and the design of the pawl shape, the left and right side parts of the elastic positioning clip 622 are moved back relative to the upper support beam 61 and form a clamping position, and because of the elastic clip return spring 6220 between the left and right, the elastic positioning clip 622 can continuously fold backwards along the inverted tooth and unfold and stop, the operation is realized by operating the upper supporting beam 61 to push forwards, the upper supporting beam 61 itself can be adjusted forwards relative to the elastic positioning clip 622 and can simultaneously form a clamping position when the elastic positioning clip 622 is stopped by each group of left inverted tooth 6011 and right inverted tooth 6021 which are opposite left and right, namely, the forward adjustment of the upper supporting beam 61 can complete the forward position adjustment by overcoming the elasticity of the clip return spring 6220 on the elastic positioning clip 622, but the inverted tooth has the limitation that the upper supporting beam 61 cannot move backwards relative to the elastic positioning clip 622 under the structure, namely cannot move backwards relative to the rotating seat 62 and the front supporting keel 2, then further design will be made as to how the upper support beam 61 can be moved back relative to the resilient positioning clip 622, or other structures that can retract the resilient positioning clip 622 can be made to smoothly retract the upper support beam 61 back relative to the resilient positioning clip 622.

Next, we further describe in detail the structure of the forward adjustment of the upper support beam 61: the left part of the clip comprises a left rotating base plate 6221 sleeved on the positioning pile 621, a left clamping plate 6222 which can extend into the left inverted tooth limiting groove 60111 towards the left side is integrally connected to the left rotating base plate 6221 near the left side, the right part of the clip comprises a right rotating base plate 6223 sleeved on the positioning pile 621, a right clamping plate 6224 which can extend into the right inverted tooth limiting groove 60211 towards the right side is integrally connected to the right rotating base plate 6223 near the right side, the left rotating base plate 6221 and the right rotating base plate 6223 of the clip can be in a circular cake-shaped structure and are in a flat shape, the left clamping plate 6222 and the right clamping plate 6224 are preferably in a strip-shaped structure, and the left part and the right part of the clip can be integrally formed through plastics because the left clamping plate 6222 and the right clamping plate 6224 are parts which are in direct and inverted tooth matching contact.

Further, the clip return spring 6220 is sandwiched between the left and right clips 6222, 6224, which is similar to many existing elastic clips, and is designed to raise the difficulty of clip folding, so that the clip is preferably kept in an open state, especially in this embodiment, when the clip 622 is not adjusted, the left and right clips 6222, 6224 are elastically pressed into the inverted tooth-shaped groove by the elasticity of the spring, when the upper support beam is pushed forward without pushing force, the clip 622 keeps still with the support beam 61, when the upper support beam 61 is pushed forward, the left and right clips 6222, 6224 are pushed to a little toward the middle by the saw teeth, but at this time, the folding degree is not large and is in an unstable folded state, because the position to the next saw tooth opens again to form a clamping position, so that the upper support beam 61 is adjusted forward and positioned.

Further, a left sleeve connection terminal 62220 sleeved on the inner ring at the left end of the clip return spring 6220 is integrally connected with a right sleeve connection terminal 62240 sleeved on the inner ring at the right end of the clip return spring 6220 is integrally connected with a left side part of the right clip plate 6224, so that the mounting stability of the clip return spring 6220 is improved, and better work is ensured. Still preferably, a left spring end limiting groove 62221 is formed in the right portion of the left clamping plate 6222 and located at the periphery of the left sleeve-connection terminal 62220 for placing the left end of the clip return spring 6220, a right spring end limiting groove 62241 is formed in the left portion of the right clamping plate 6224 and located at the periphery of the right sleeve-connection terminal 62240 for placing the right end of the clip return spring 6220, and the left spring end limiting groove 62221 and the right spring end limiting groove 62241 are located at the periphery of the spring end, so that the positioning of the end of the clip return spring 6220 is further improved, and the reliability of the structure is ensured. In addition, the left clamp plate 6221 and the right clamp plate 6223 are stacked in the vertical direction, and a similar structure of scissors or other clamps may be used, so that the left clamp plate 6221 and the right clamp plate 6223 are stacked by using a plurality of steps or other structures capable of being nested up and down to ensure that the left clamp plate 6222 and the right clamp plate 6224 are at the same horizontal position, because the left rack 601 and the right rack 602 are preferably disposed at the same horizontal position. While spud 621 is threaded upwardly through both clamp left-hand rotational base 6221 and clamp right-hand rotational base 6223, and preferably are concentric.

Preferably, the lower portion of the upper support beam 61 is provided with a front-rear linear rectangular groove 66 which is concave upward at a distance between the left rack 601 and the right rack 602 to form a front-rear linear rectangular groove 66 extending forward and backward, that is, the front-rear linear rectangular groove 66 is formed at an upper side of the clip channel 661122 and is communicated up and down, the front-rear linear rectangular groove 66 is embedded with a rectangular positioning guide plate 63 for guiding the front-rear linear rectangular groove 66 in a front-rear linear manner, that is, the upper support beam 61 has a linear front-rear guiding effect along the rectangular positioning guide plate 63 better by providing the front-rear linear rectangular groove 66, in addition, the rectangular positioning guide plate 63 is provided with a positioning hole 630 which is penetrated up and down for the positioning pile 621 to be inserted into and installed up, that is, the positioning pile 621 also penetrates up through the rectangular positioning guide plate 63, the hole formed in the clip left rotating substrate 6221 and the clip right rotating substrate 6223 is preferably a single circular hole structure and the diameter of the positioning pile 621 is equal or almost equal to the diameter of the rectangular positioning guide plate 63, so that the front-rear substrate 621 is a horizontal hole 630 is not moved relatively to the linear guide plate 621, and the front-rear substrate 6223 is a horizontal hole is not moved relatively the linear hole. But in order to enable the upper support beam 61 to retract after being adjusted forward to achieve the back and forth adjustment of the front and rear positions, we design the structure including the positioning holes 630 as follows:

the positioning hole 630 comprises a front circular part 6301 and a rear circular part 6302 which are arranged at intervals from front to back, and a contraction part 6303 communicated between the front circular part 6301 and the rear circular part 6302, the diameter of the front circular part 6301 and the diameter of the rear circular part 6302 are the same as or nearly the same as the diameter of the positioning pile 621, the contraction part 6303 is rectangular and the left-right spacing is smaller than the diameter of the positioning pile 621, the part of the rectangular positioning guide plate 63 positioned in the positioning hole 630 is a plastic part, the lower surface of the rectangular positioning guide plate 63 is integrally connected with left and right side closing bars 6311 and 6312 which are respectively positioned at left and right sides of the elastic positioning clip 622 at intervals and can close the elastic positioning clip 622 when the positioning pile 621 is inserted into the rear circular part 6302 from the front circular part 6301, the left side gather rail 6311 and the right side gather rail 6312 are both extended back and forth. The left side closing bar 6311 is abutted against the left side outer root position of the left side catch plate 6222, the right side closing bar 6312 is abutted against the right side outer root position of the right side catch plate 6224, and at the time of initial installation, the elastic positioning clip 622 is in an open state when the positioning pile 621 is installed in the front circular portion 6301, if the positioning pile 621 is brought into the rear circular portion 6302 by horizontal force through the contracted portion 6303, the elastic positioning clip 622 is in a closed state, when the upper support beam 61 is adjusted by pushing forward from behind, when the rectangular positioning guide plate 63 is in a position intermediate front and rear in the front-rear linear rectangular groove 66, The pushing is smooth, the extrusion friction force on both sides of the elastic positioning clip 622 ensures that the positioning pile 621 is not pushed into the rear circular portion 6302 from the front circular portion 6301, and of course, in order to reduce the friction force, the surface of the contact portion needs to be smooth, at this time, the positioning pile 621 will be in the front circular portion 6301 and the shrinkage portion 6303 will limit the positioning pile 621, but after the upper support beam 61 moves forward, the rear side groove wall of the front and rear linear rectangular groove 66 will finally abut against the rear side portion of the rectangular positioning guide plate 63, at this time, the upper support beam 61 is pushed forward again with force, due to the design of the positioning hole 630 and the plastic property of the rectangular positioning guide plate itself, the shrinkage portion 6303 is deformed and opened by the external force, that is, the positioning pile 621 forms a backward larger force to spread the shrinkage portion 6303 and pass through the shrinkage portion 6303 to enter the rear circular portion 6302, the left clamping plate 6222 and the right clamping plate 6224 are inwards folded in the middle left and right due to the lever force formed by the abutting of the left folding bar 6311 and the right folding bar 6312, that is, the clip is folded and wrapped between the left folding bar 6311 and the right folding bar 6312, the clip is folded in a relatively complete and relatively stable folded state at this time, so that the upper supporting beam 61 can return to the final position without being influenced by the elastic positioning clip 622, The re-entry into the new forward position adjustment makes this process repeatable, so that the individual positions can be adjusted back and forth repeatedly. The rectangular positioning guide plate 63 is located at the plastic part of the positioning hole 630, which is very necessary, and of course, the rectangular positioning guide plate 63 may be integrally formed by plastic, in addition, in order to improve the plasticity of the positioning hole 630, plastic lifting grooves 63000 penetrating up and down may be formed at two sides of the positioning hole 630, the plastic lifting grooves 63000 may be wavy, or the left plastic lifting groove 63000 is similar to the left half of the positioning hole 630 in appearance, the right plastic lifting groove 63000 is similar to the right half of the positioning hole 630 in appearance, by planing out materials, The plastic of the surrounding part of the positioning hole 630 is larger, so that the positioning pile 621 can be reliably supported and passed through.

Further, the lower side of the upper support beam 61 is formed with a front transition open area 6000 in front of the left and right side pawl limit grooves 60111 and 60211 for the left and right side clips 6222 and 6224 to be placed when the portion of the positioning pile 621 inserted into the positioning hole 630 is opened after the rear circular portion 6302 enters the front circular portion 6301. This design follows the previous design because the upper support beam 61 is retracted smoothly after the posts 621 are in the rear circular portion 6302, but when the upper support beam 61 is retracted to a very rear, the front side portion of the rectangular positioning guide plate 63 will also push against the front side groove wall of the front-rear linear rectangular groove 66, and at this time, the rectangular positioning guide plate 63 will push the upper support beam 61 backward with force, and the rectangular positioning guide plate 63 will follow the upper support beam 61 forward for a certain length and will return the posts 621 to the front circular portion 6301, at this time, the resilient positioning clip 622 will be opened, which corresponds to the effective state of the resilient positioning clip 622 in the forward adjustment, and then a restoring area for the left side catch plate 6222 and the right side catch plate 6224 of the resilient positioning clip 622 to be put in and open is provided in the front transition opening area 6000 in front of the clip channel 661122, which is a ready area for the next forward adjustment process to start the forward adjustment of the upper support beam 61, ensuring that the forward adjustment of the upper support beam 61 is a repeatable process. The whole design can not cause the problem that the front adjustment cannot be carried out later, but any position can be adjusted and positioned repeatedly.

In addition, the installation of the rotating seat 62 and the upper supporting beam 61 and the upper supporting keel 6 is described simply, the rotating seat 62 can adopt the existing double-lug type hinge seat and is in an inverted arrangement, the hinge part of the rotating seat 62 is arranged at the lower part and is connected with the hinge part forming a single lug at the upper end of the supporting keel 6 in a left-right series mode through a hinge shaft, the axial direction of the hinge shaft is in the left-right direction, in order to improve the position after rotation, a certain stability is provided, friction damping sheets 6006 sleeved on the hinge shaft are arranged at the interval between the hinge part of the rotating seat 62 and the hinge part of the upper supporting keel 6 after the hinge part is connected in a left-right close mode, of course, the damping type rotating connection mode can also adopt other conventional damping type rotating connection structures, mainly in order to enable rotation, but the rotation needs a large force, the position after rotation is ensured to be provided with a certain stability, the hinge shaft is not easy to rotate, and the hinge shaft is not loose when in use, on the one hand, and on the other hand, the safety and comfort when in use are also considered on many furniture or mechanical structures. Similarly, the front portion of the upper support beam 61 and the headrest body assembly may be connected by the damping type rotation connection structure, so that the headrest body assembly can be finely adjusted vertically around the front portion of the upper support beam 61, so that the axis direction of the hinge shaft disposed therebetween is also in the left-right direction, but here, since only the upper support beam 61 and the headrest body assembly need to rotate, the front portion of the upper support beam 61 may be directly formed with the hinge portion or fixed with an existing hinge seat, the rear portion of the headrest body assembly may be directly formed with the corresponding hinge portion or fixed with an existing hinge seat, and then the front portion of the upper support beam 61 and the corresponding hinge structure on the rear portion of the headrest body assembly may be connected in series by the hinge shaft, and the friction damping plate 6006 may be similarly disposed. It should be noted that the range of motion of the pivoting seat 62 after being hinged to the upper support keel 6 is also good, or the range of motion of the front portion of the upper support beam 61 after being hinged to the headrest body assembly is preferably limited and can be adjusted by corresponding gears, so that the existing design can be used, for example, a rotation limiting stop 6666 extending leftwards and rightwards and protruding upwards in an arc shape is formed on the hinged portion of the upper support keel 6, and gear slots 6667 for adjusting and clamping the rotation limiting stop 6666 are formed on the hinged portion of the pivoting seat 62 at intervals in the circumferential direction, further, a grid position 6668 for blocking the circumferential rotation of the rotation limiting stop 6666 is formed on the hinged portion of the front portion of the upper support beam 61 and the headrest body assembly in the front-rear position, and these rotation limiting stops 6666, the gear slots, the grid position and the like can be set on the hinged portion of the upper support beam 61, so that the rotation is mainly adjustable and also limited, and other existing structures are possible, and are not repeated here.

The installation connection between the rotating base 62 and the upper supporting beam 61 can be further optimized, the rotating base 62 is inversely arranged, then the upper part of the rotating base 62 is a basic supporting part and the lower part of the rotating base is a hinged part, in order to better enable the upper supporting beam 61 to be better adjusted back and forth on the rotating base 62 and ensure the connectivity between structures, the rotating base 62 is modified on the basis of the existing double-lug type hinge base, namely, the basic supporting part of the double-lug type hinge base on the upper part of the rotating base 62, the basic supporting part of the rotating base 62 is of a rectangular block structure, then a dovetail installation groove t1 which extends back and forth in a penetrating way and the top of which is communicated with the outside is formed on the upper surface of the basic supporting part, The cross section of the dovetail mounting groove t1 perpendicular to the front-rear direction is in the shape of a right isosceles trapezoid, the front-rear direction is communicated and facilitates the front-rear movement of the upper supporting beam 61, the upper side of the dovetail mounting groove t1 is opened, the distance between the left groove wall and the right groove wall of the dovetail mounting groove t1 from bottom to top is gradually reduced to form an inclined surface structure, the peripheral outline of the lower side part of the upper supporting beam 61 is matched with the groove shape of the dovetail mounting groove t1, the lower side part of the upper supporting beam 61 also forms a dovetail part t2, the left-right rack, the left-right inverted tooth limiting groove, the front-rear linear rectangular groove 66, the front transition opening area 6000 and the clip channel 661122 are formed in the dovetail part t2, while the positioning pile 621 is inserted and positioned in the groove bottom of the dovetail mounting groove t1 of the rotating seat 62, the horizontal direction is not movable, here, in order to smoothly mount the positioning pile 621 and the rotating seat 62, the basic supporting part and the hinging part of the rotating seat 62 are divided into two structures of up-and-down splicing, namely a basic supporting part j1 of the rotating seat and a hinging part j2 of the rotating seat, when the positioning pile is mounted, the rectangular positioning guide plate 63 is firstly placed in the front-back linear rectangular groove 66, the elastic positioning clip 622 is placed on the lower side of the rectangular positioning guide plate 63 and is clamped in the clip channel 661122, the upper supporting beam 61 is firstly worn forward through the dovetail part t2 in the dovetail mounting groove t1 formed in the basic supporting part j1 of the rotating seat 62, Because of the groove-shaped arrangement, the upper support beam 61 does not move up and down relative to the rotating seat foundation supporting part j1, then the positioning pile 621 is penetrated upwards from the bottom of the rotating seat foundation supporting part j1 and is penetrated upwards all the way through the groove bottom of the dovetail mounting groove t1 until the positioning pile 621 is penetrated upwards and is penetrated into the corresponding hole positions of the elastic positioning clip 622 and the rectangular positioning guide plate 63 at the same time, finally the rotating seat foundation supporting part j1 and the rotating seat hinging part j2 are installed in the existing detachable fixed splicing mode such as the bolt connection mode or the transverse wedge splicing mode, the lower end of the positioning pile 621 is propped against the junction part at the top of the rotating seat hinging part j2 or after the positioning pile 621 is penetrated upwards, the bottom mounting filler of the rotating base support section j1 abuts the lower end of the dowel 621. In this way, the mounting can be smoothly performed, and the adjustment of the front-rear position and the up-down angle of the headrest can be performed well.

On the other hand, the headrest is also preferably capable of being greatly adjusted up and down, the structure can be realized in the existing mode, in the connecting structure of the front supporting keel 2 and the upper supporting keel 6, the lower side part of the upper supporting keel 6 forms a fully enclosed or fully enclosed enclosing frame 6k, the enclosing frame 6k forms a channel which extends up and down, the front supporting keel 2 is penetrated with the enclosing frame 6k through the channel of the enclosing frame 6k, for example, the upper side adjusting connecting section 24 of the front supporting keel 2 is penetrated, the front side part of the upper side adjusting connecting section 24 of the front supporting keel 2 is provided with upper and lower gear adjusting grooves 2s which are arranged at intervals up and down, the upper and lower gear adjusting grooves 2s can be arc-shaped concave grooves, the rear side part of the upper supporting keel 6 is embedded with upper and lower gear adjusting columns 6s which can be abutted against the upper and lower gear adjusting grooves 2s, the upper and lower gear adjusting column 6s is extended and arranged back and forth, the rear side part of the upper and lower gear adjusting column 6s is preferably arc-shaped, thus, the upper and lower gear adjusting column 6s can be matched with the upper and lower gear adjusting groove 2s better, based on the structure, the upper and lower gear adjusting column 6s is preferably provided with a wave bead screw or a wave spring and other structures, for example, the wave bead screw is used as a derivative product of a set screw, and consists of a spring, a steel ball and a shell, the steel ball can be exposed, the steel ball can be just used as the rear side part of the upper and lower gear adjusting column 6s and is spherical, the steel ball can be matched with the upper and lower gear adjusting groove 2s better, meanwhile, the steel ball is subjected to elastic force back and forth due to the spring which extends back and forth, when the upper supporting keel 6 is adjusted in the upper and lower directions of the front supporting keel 2, the steel ball can be retracted forward a certain distance, the upper supporting keel 6 can be moved up and down conveniently, then when the corresponding position of the upper and lower gear adjusting grooves 2s is reached, the steel balls can be ejected backwards to lean against the upper and lower gear adjusting grooves 2s, if the upper supporting keel 6 is not pushed up and down by force, the upper and lower gear adjusting columns 6s are positioned in the upper and lower gear adjusting grooves 2s and cannot move up and down, so that the connecting structure is convenient for the upper supporting keel 6 to carry the headrest assembly to adjust up and down and position.

This embodiment also provides a chair including the headrest structure described above, and of course, the chair also continues to use the rocking chair back structure of embodiments 1 and 2.

Example 4 referring to the drawings in example 1, a headrest structure according to this example is a further optimization of the headrest structure according to example 3, and can be used on the base structure of example 3 or alone.

Specifically, the headrest structure comprises a headrest main body assembly for leaning on a head, the headrest main body assembly comprises a middle headrest, a left headrest and a right headrest, wherein the left headrest and the right headrest are respectively connected with the left side and the right side of the middle headrest, the left headrest can rotate left and right around the left side of the middle headrest, the right headrest can rotate left and right around the right side of the middle headrest, the left headrest is hinged with the left side of the middle headrest through a left hinge 71, the right headrest is hinged with the right side of the middle headrest through a right hinge 72, the left hinge 71 is positioned on the outer side of the middle headrest, and the right hinge 72 is also positioned on the outer side of the middle headrest. The headrest of design can cladding head better through three left side, let the head obtain cladding better, the axial of the articulated shaft of left side hinge 71 and right side hinge 72 is the upper and lower direction, let left headrest and right headrest all swing about the horizontal direction can, to the cladding of head mainly in the horizontal side, in addition, left side hinge 71 and right side hinge 72 are in the outside of well headrest, also can make things convenient for the hinge and control the change maintenance etc. of headrest, because they are the part that can often move, the problem appears relatively easily.

Preferably, the middle headrest comprises a middle headrest front substrate a1 and a middle headrest rear frame a2 which are spliced from front to back, and a middle headrest sponge pad a3 fixed at the front side surface of the middle headrest front substrate a1, the middle headrest front substrate a1 and the middle headrest rear frame a2 can be made of plastic materials, and are spliced to form the whole basic structure of the middle headrest through existing modes such as fastening or screw thread connection, and the inside is of a hollow structure, so that a better pillow appearance structure can be formed, then the middle headrest sponge pad a3 can be comfortably used when being matched with the middle headrest sponge pad a3, and the left headrest comprises a left headrest front substrate b1 and a left headrest rear frame b2 which are spliced from front to back, and a left headrest sponge pad b3 fixed at the front side surface of the left headrest front substrate b1, and the right headrest comprises a right headrest front substrate c1 and a right headrest rear frame c2 which are spliced from front to back, and a right headrest sponge pad c3 fixed at the front side surface of the right headrest front substrate c1, and the left headrest can be designed to be the same. In order to install the demand, the concatenation position of well headrest left and right sides is formed with first installation mouth a01 and second installation mouth a02 respectively, and first installation mouth a01 and second installation mouth a02 just are the installation connection that makes things convenient for inside and outside structure, specifically, well headrest pass through left headrest connecting seat with left side hinge 71 is connected, well headrest pass through right headrest connecting seat with right side hinge 72 is connected, left headrest connecting seat includes that at least a left side has a part to stretch out first installation mouth a01 and fix in the left first board a211 on the front side position of well headrest back frame a2 and the left side of left first board a211 stretches out first installation mouth a 01's part an organic whole and be connected with forward extension and be located in the left side of well headrest second board a212 that left side hinge 71 was used for the installation, the right headrest connecting seat includes that at least right side has a part to stretch out second installation mouth a02 and fix in the front side of well headrest back frame a 2a first board a can stretch out in the mode that the first board a right side of hole a221 is used for the realization of the first board a is comparatively high-efficient mode with the right side of a side, and the first board a left side of a2 is equipped with a hole for the realization of a side, and the mode that the right side hole is used for the connection is stretched out in the front side of a first board a221 is used for the front side of a relatively easy-to be equipped with a screw hole.

Preferably, one hinge blade of the left hinge 71 is fixed on the left second plate a212, the other hinge blade of the left hinge 71 as a left movable blade 710 extends into the left headrest and is fixed with the left headrest, a corresponding mounting opening is formed after the right side of the left headrest is spliced for the left movable blade 710 to extend into for fixing, the left movable blade 710 may be fixed on a rear side portion of the left headrest front substrate b1, that is, on a side of the left headrest front substrate b1 close to the left headrest, and of course, the left movable blade 710 may also be fixed on a front side portion of the left headrest rear frame b 2; one hinge blade of the right hinge 72 is fixed on the right second plate a222, the other hinge blade of the right hinge 72 is used as a right movable blade 720 to extend into the right headrest and be fixed with the right headrest, a corresponding mounting opening is formed after the left side of the right headrest is spliced to allow the right movable blade 720 to extend into for fixing, the right movable blade 720 can be fixed on the rear side part of the right headrest front substrate c1, that is, on one side of the right headrest front substrate c1 close to the right headrest, and of course, the right movable blade 720 can also be fixed on the front side part of the right headrest rear frame c 2. By the design, the left headrest and the right headrest can smoothly rotate left and right to be adjusted.

Of course, for rotation amplitude control, the following modifications are made: a left rotation limiting plate a213 extending leftwards and used for limiting the left movable blade 710 to rotate leftwards and backwards is integrally connected to the front side part of the left second plate a 212. A right rotation limiting plate a223 extending rightward and used for limiting the right movable blade 720 to rotate rightward and backward is integrally connected to the front side portion of the right second plate a 222. The left rotation limit plate a213 and the right rotation limit plate a223 are both to prevent excessive rearward rotation.

Further, at least a portion of the left second plate a212 is also in the left headrest and at least a portion of the right second plate a222 is also in the right headrest, so that the mechanical structure is less exposed, and better protection effect and aesthetic degree are achieved.

In order to better protect and cover the left headrest connecting seat and the right headrest connecting seat, a left rear shielding protection plate a100 close to the rear side of the left headrest connecting seat can be further fixed on the front side part of the middle headrest rear frame a2, the left rear shielding protection plate a100 can be wrapped on the left side and the right side of the left headrest connecting seat and is fixed on the front side part of the middle headrest rear frame a2 together, the left rear shielding protection plate a100 is provided with a circular arc surface with the left rear surface of 90 degrees, the structure similar to a circular angle is formed, a reinforcing rib can be formed on the part wrapped by the left rear shielding protection plate a100 to abut against the left headrest connecting seat, so that the left headrest connecting seat is better shielded at the rear side and is more attractive, the right rear shielding protection plate a200 close to the rear side of the right headrest connecting seat is also fixed on the front side part of the middle headrest rear frame a2, and the right rear shielding protection plate a200 is arranged in a left and right mirror image mode with the left rear shielding protection plate a100 and is matched with the right headrest connecting seat. Both shielding protection plates can also be processed by plastic.

Preferably, the left hinge 71 is a damping hinge, and the right hinge 72 is a damping hinge. Therefore, the left headrest can rotate left and right and the right headrest can rotate left and right by applying a certain force, so that the left and right headrest can be kept in a relatively stable state to be abutted against the head under the condition that no force is applied, and the left and right headrest has better comfort and safety, and is not rotated uncontrollably and easily.

The mounting of the entire headrest assembly on the chair is also easy to achieve, as is mentioned in example 3: therefore, the front side portion of the upper support beam 61 may be directly formed with a hinge portion or an existing hinge seat may be fixed, or the rear side portion of the headrest body assembly may be directly formed with a corresponding hinge portion or an existing hinge seat may be fixed, so that the front side portion of the upper support beam 61 and the corresponding hinge structure on the rear side portion of the headrest body assembly may be connected in series by a hinge shaft, and the friction damper 6006 may be provided, in this embodiment, the hinge structure may be formed at the rear side portion of the middle headrest rear frame a2, and may be used for the damped rotary connection of the upper support beam 61, so that the entire headrest assembly may be used for up-down rotary adjustment on a chair. In particular, the rotation structure of the left and right headrest in the headrest assembly can better cooperate with the functions of the rocking and the front and rear position adjustment of the backrest in the previous embodiment, and also adjust the position of the human body so as to maintain a very good comfort level.

Of course, the present embodiment also provides a chair including the headrest structure described above.

Embodiment 5, referring to the drawings in embodiment 1, an armrest structure of the present embodiment may be applied to the aforementioned chair, and used in combination, but may also be used alone in other existing chairs.

Specifically, the handrail structure comprises a handrail assembly, wherein the handrail assembly comprises a handrail outer sleeve f and a handrail lifting keel f1 which is vertically arranged on the handrail outer sleeve f in a penetrating manner and can be vertically adjusted on the handrail outer sleeve f, a handrail base support plate f2 which is arranged at the top of the handrail lifting keel f1, a handrail left-right movement guide seat f3 which can move left and right and a handrail main body part which can drive the handrail left-right movement guide seat f3 to move left and right and can move around the handrail left-right movement guide seat f3 in the horizontal direction and is used for leaning by hands are arranged on the handrail base support plate f 2. The arm casing f may be directly mounted to the seat or back of the chair, enabling the arm structure to be used on the chair. The armrest coat f, the armrest lifting keel f1, the armrest substrate support plate f2 and the armrest left-right movement guide seat f3 can be made of plastic materials by integral molding. The armrest lifting spine f1 is preferably a three-dimensional T-shaped structure or an inverted L-shaped structure that is hollow in the interior to form a basic armrest support structure. The handrail base support plate f2 is tiled and fixed at the top of the handrail lifting keel f1 in a clamping or screw fixing mode and covers the hollow area in the handrail lifting keel f1, the upper surface of the handrail base support plate f2 needs to be smooth as much as possible, and therefore large friction resistance cannot be generated when the handrail main body part moves horizontally. Through the design of the handrail left and right movement guide seat f3, the handrail left and right movement guide seat f3 is taken as a movement center, on one hand, the handrail main body part and the handrail left and right movement guide seat f3 can move together in a common way, namely move together in a left and right direction, and on the other hand, the handrail main body part can also move relative to the handrail left and right movement guide seat f3 in a rotation mode and the like rather than move in a left and right direction, so that the position adjustment movement of the handrail main body part is more various.

Specifically, the armrest body part can move forward and backward along the armrest left and right movement guide seat f3 and can also horizontally rotate around the armrest left and right movement guide seat f3, that is, the armrest body part and the armrest left and right movement guide seat f3 can rotate around the armrest left and right movement guide seat f3 and move forward and backward relative to the armrest left and right movement guide seat f3 in addition to the common left and right translation motion, so that the adjustability of the armrest is further improved.

Further, the handrail moving guide f3 comprises a handrail moving guide plate f31 inserted into the lower surface portion of the handrail base support plate f2 and a handrail moving guide center post f32 integrally connected to the upper portion of the handrail moving guide plate f31 and moving toward the handrail passing through the handrail base support plate f2, the handrail base support plate f2 is provided with a handrail moving passage hole f21 through which the handrail moving guide center post f32 passes upward and moves right and left, and a bar-shaped hole through which the handrail moving passage hole f21 extends right and left, so that the handrail moving guide center post f32 can translate and guide right and left, the armrest main body part comprises an armrest bottom plate f4 positioned on the upper side of the armrest substrate supporting plate f2 and an armrest surface substrate f44 which is fixedly covered on the upper side of the armrest bottom plate f4, the armrest bottom plate f4 and the armrest substrate supporting plate f2 are in up-down contact, the armrest bottom plate f4 horizontally moves along the upper surface of the armrest substrate supporting plate f2, thus the armrest main body part correspondingly moves, the armrest surface substrate f44 is a structure which is directly used for being supported by the armrest and is arranged and connected to the upper side of the armrest bottom plate f4, a leather layer or a soft structure layer such as a sponge cushion can be paved on the upper surface of the armrest surface substrate f44 to improve comfort, the handrail bottom plate f4 and the handrail base support plate f2 can be integrally formed by plastic, the handrail bottom plate f4 is provided with a handrail forward and backward movement passing hole f41 which penetrates vertically and extends forwards and backwards for the handrail left and right movement guiding central column f32 to penetrate upwards and move forwards and backwards for adjustment, namely the handrail left and right movement guiding central column f32 penetrates upwards and passes through the handrail left and right movement passing hole f21 and the handrail forward and backward movement passing hole f41, then the forward and backward size of the handrail left and right movement passing hole f21 and the left and right size of the handrail forward and backward movement passing hole f41 are equal to or slightly larger than the diameter size of the handrail left and right movement guiding central column f32 as much as possible, in the design, when the handrail bottom plate f4 translates left and right, the left and right hole walls of the handrail forward and backward movement passing hole f41 abut against and limit the left and right sides of the handrail left and right movement guiding central column f32, so that the handrail bottom plate f4 translates left and right together in the handrail left and right movement passing hole f21 with the handrail left and right movement guiding central column f32, the structure can achieve common left and right movement adjustment. the movement adjustment of the armrest floor f4 represents the movement of the entire armrest body, and may be regarded as the movement adjustment of the armrest. Furthermore, the top of the handrail left-right movement guiding center column f32 is fixedly connected with a handrail rotation center block f5 for horizontally rotating the handrail bottom plate f4, the handrail rotation center block f5 which can drive the handrail bottom plate f4 to horizontally rotate around is arranged in the upper surface position of the handrail bottom plate f4, and the handrail front-rear movement guiding seat f6 for guiding the handrail bottom plate f4 in the front-rear direction is provided, the top of the handrail left-right movement guiding center column f32 also passes through the handrail front-rear movement guiding seat f6 upwards, the handrail bottom plate f4 can be seen to flexibly rotate around the handrail left-right movement guiding center column f32 from the structure, However, the rotation is too flexible and too loose, so that the armrest rotation center block f5 is provided so that the rotation of the armrest base plate f4 is limited and the guiding and stressing of the armrest base plate f4 to move forward and backward can be more optimized, and the front and rear sides of the armrest rotation center block f5 are configured so that some rotation limitation can be provided.

Further, a handrail forward and backward movement adjusting limit groove f42 which is extended forward and backward for installing and placing the handrail forward and backward movement adjusting guide seat f6 is formed on the upper surface of the handrail bottom plate f4, the handrail forward and backward movement passing hole f41 is formed at the bottom of the handrail forward and backward movement adjusting limit groove f42, the left and right side groove walls of the handrail bottom plate f4 positioned in the handrail forward and backward movement adjusting limit groove f42 respectively comprise a straight guide part f421 which extends forward and backward and a forward and backward adjusting arc limiting part f422 which is connected with the straight guide part f421 in a forward and backward mode, the front-back adjusting arc limiting part f422 is composed of a plurality of front-back adjusting single arc walls f4220 which are continuous front and back and face away from the armrest front-back moving adjusting guide seat f6, the front-back adjusting single arc walls f4220 are single front-back limiting side walls and form a single arc groove, the left front-back adjusting single arc walls f4220 form arc grooves arched left, the right side arc grooves arch right, the front-back limiting grooves are arranged front and back, the armrest bottom plate f4 can be adjusted and limited in a multi-gear mode, and of course, the armrest front-back moving adjusting guide seat f6 also needs to be provided with a structure which can be matched with the left armrest front-back moving adjusting limiting grooves f42, and the structure specifically comprises: the front-back adjusting spring f611 extending leftwards and rightwards and the front-back adjusting spring f611 are arranged in the front-back moving adjusting guide seat f6, the left end and the right end of the front-back adjusting spring f611 are respectively connected with the front-back adjusting single arc wall f4220 on the left side and the front-back adjusting single arc wall f4220 on the right side, the left front-back adjusting end block f612 and the right front-back adjusting end block f613, namely the left front-back adjusting end block f612 and the right front-back adjusting end block f613, can be clamped into arc grooves formed by the front-back adjusting single arc walls, so that elastic limit is achieved, and then the front-back moving adjustment can be realized by applying certain force, so that the front-back adjustment of the handrail bottom plate f4 is required to overcome the elastic limit structure, and the front-back position of the handrail bottom plate f4 is in a relatively stable state under the condition that no excessive external force is applied after the adjustment.

Preferably, the periphery of the handrail forward and backward movement adjusting guide seat f6 is rectangular, the forward and backward movement adjusting spring f611 extends and passes through the handrail forward and backward movement adjusting guide seat f6, a concave handrail rotation limiting groove f52 for enabling the handrail rotation center block f5 to rotate relatively is formed in the upper surface of the handrail forward and backward movement adjusting guide seat f6, and a handrail rotation center surrounding hole f51 which penetrates vertically and is used for enabling the top of the handrail forward and backward movement guiding center column f32 to penetrate upwards is formed in the bottom of the handrail rotation limiting groove f 52. By this design, the armrest bottom plate f4, together with the armrest forward and backward movement adjusting guide seat f6, can horizontally rotate and be limited in rotation about the armrest rotation center block f5 fixed on the top of the armrest left and right movement guiding center column f32, by the arrangement of the armrest rotation limiting groove f 52. Further, the walls of the handrail forward and backward movement adjusting guide seat f6 located at the left and right sides of the handrail rotation limiting groove f52 are straight walls extending forward and backward, the front side walls and the rear side walls of the handrail forward and backward movement adjusting guide seat f6 located at the handrail rotation limiting groove f52 form a front side rotation adjusting arc limiting portion f651 and a rear side rotation adjusting arc limiting portion f652, the front side rotation adjusting arc limiting portion f651 is composed of a plurality of front side rotation adjusting single arc walls f6510 which are continuous in arc shapes and arch opposite to the direction of the handrail rotation center surrounding hole f51, the front side rotation adjusting single arc walls f6510 form single forward arched limiting grooves, the front side rotation adjusting single arc walls f6510 are distributed in the left and right directions and are preferably on arc-shaped forward arched tracks, the arc tracks are preferably the centers of the handrail left and right movement guiding center column f32, and the front side walls and the rear side walls of the handrail rotation limiting groove f52 are designed to be mirror images of the front side walls of the handrail rotation limiting groove f 52: the rear rotation adjusting arc-shaped limiting part f652 consists of a plurality of rear rotation adjusting single arc-shaped walls f6520 which are continuous in arc shape and arc in a direction opposite to the surrounding hole f51 of the armrest rotation center.

Further, a front rotation adjusting spring f6511 and a rear rotation adjusting spring f6521 which extend back and forth and are arranged back and forth are embedded in the armrest rotation center block f5, the front end of the front rotation adjusting spring f6511 is connected with a front rotation adjusting end block f6512 which can be clamped into the front side rotation adjusting single arc wall f6510, and the rear end of the rear rotation adjusting spring f6521 is connected with a rear rotation adjusting end block f6522 which can be clamped into the rear side rotation adjusting single arc wall f 6520. Through the design of this kind of structure for can obtain the spacing of the front side cell wall and the rear side cell wall of rotation regulation end piece in handrail rotation spacing groove f52 after rotating, here through control handrail rotation spacing groove f52 control about the interval and rotate the control of adjusting the single arc wall's quantity just can reach the rotation range, as long as can prevent going on of rotation at the lateral wall of handrail rotation spacing groove f52 left and right sides. In addition, the structure is more stable in the horizontal translation.

As a preferred mode, the lower side portion of the handrail base supporting plate f2 is provided with a handrail left-right adjusting limiting groove f22 into which the handrail left-right moving guide plate f31 is placed, the front side and rear side walls of the handrail left-right adjusting limiting groove f22 are respectively formed with a front left-right adjusting arc limiting portion f221 and a rear side left-right adjusting limiting portion f222, the front side left-right adjusting arc limiting portion f221 is formed by a plurality of front left-right adjusting single arc walls f2210 which are continuous in a left-right linear mode and face away from the handrail left-right moving guide plate f31, the rear side left-right adjusting limiting portion f222 is formed by a plurality of rear left-right adjusting single arc walls f2220 which are continuous in a left-right linear mode and face away from the handrail left-right moving guide plate f31, the front side of the handrail left-right moving guide plate f31 is integrally connected with a front left-right adjusting positioning arc protruding portion f311 which can abut against the front left-right adjusting arc limiting portion f221, the handrail left-right adjusting arc limiting portion f31 is formed by a plurality of left-right adjusting arc walls f221, the handrail left-right adjusting arc limiting portion f can be directly arranged at the front side left-right adjusting arc limiting portion f222, and the handrail left adjusting limiting portion f can be directly due to the fact that the whole is required to the fact that the left-right adjusting arc limiting structure can be formed by using a certain plastic deformation structure, and the front side of the front side can be more flexible, and the front side adjusting limiting portion can be more directly used, and the front side adjusting limiting portion can be formed by adopting a certain plastic structure, and the front side adjusting limiting structure can be provided with a certain plastic, and the front side, and the side can be used and the bending device can be made.

Preferably, a lift adjustment link f7 for lift adjustment is mounted to the armrest lift keel f 1. The lower side part of the handrail substrate supporting plate f2 is provided with a lifting adjusting spring f77 which extends downwards and abuts against the lifting adjusting linkage rod f7 to perform lifting adjustment, a button structure extending out of the handrail lifting keel f1 can be arranged at the position of the lifting adjusting linkage rod f7 below the lifting adjusting spring f77, and the lifting adjusting of the handrail lifting keel f1 is completed by operating the button and acting on the lifting adjusting spring f77, so that the upper and lower positions of the handrail can be adjusted.

Like this, whole handrail main part not only can go up and down, can also horizontal translation to can adjust with the rotation about on horizontal translation's basis fore-and-aft, the position of adjusting is wider, lets the user have better experience.

The present embodiment also provides a chair including the aforementioned armrest structure, and other partial structures of the chair may also employ the respective structures of the back and headrest portions of the chair in the aforementioned embodiments.

Example 6, referring to the drawings in example 1, an armrest structure of this example is an extended design of the armrest structure of example 5, which can be used in combination or implemented separately, and can be better engaged with the chair back and the functions of the armrest structure are added.

The method comprises the following steps: the utility model provides an armrest structure, includes main support fossil fragments 1 front side installation of main support fossil fragments 1 is connected with preceding support fossil fragments 2 and be used for with seat support fixed connection and confession after the installation of main support fossil fragments 1 can make the bottom fossil fragments 3 that main support fossil fragments 1 left and right swayd, install the back of the chair subassembly on the preceding support fossil fragments 2, still include the front support fossil fragments 2 left side and right side are installed respectively and are connected with an armrest hanging beam d, and the armrest hanging beam d of left and right sides sets up mirror symmetry about and all installs an armrest subassembly in the front side position of armrest hanging beam d of left and right sides, and the armrest hanging beam d of left and right sides sets up mirror symmetry about the armrest hanging beam d of left side is arched in the arc of rear left, and armrest hanging beam d of right side is arched in the arc of rear right. Through this kind of design of suspension, make the handrail subassembly just can follow preceding supporting fossil fragments 2, or follow the back of the chair and can rock about, fore-and-aft adjustment etc. instead of being motionless like installing on the seat support, thereby can not cooperate the back of the chair to be suitable for more new functions. The left handrail hanging beam d and the left part of the front supporting keel 2 are fixedly installed through bolts or in a clamping mode, and the right handrail hanging beam d and the right part of the front supporting keel 2 can be fixedly installed in the same fixing mode.

Preferably, the armrest assembly comprises an armrest outer sleeve f, an armrest lifting keel f1 which is vertically arranged on the armrest outer sleeve f in a penetrating manner and can be vertically adjusted on the armrest outer sleeve f, an armrest substrate supporting plate f2 which is arranged at the top of the armrest lifting keel f1, and an armrest main body part which is arranged on the armrest substrate supporting plate f2 and is used for leaning by hands, wherein an embedding clamping block f01 which is used for being arranged on an armrest hanging beam d is integrally connected at the outer surface of the armrest outer sleeve f, an armrest sleeving pipe d1 which is vertically penetrated for the armrest outer sleeve f to be downwards sleeved is formed at the front side part of the armrest hanging beam d, and an armrest sleeving installation clamping groove d11 which is clamped with the embedding clamping block f01 is formed on the inner wall of the armrest sleeving pipe d 1.

Preferably, a lifting adjusting linkage rod f7 for lifting adjustment is installed in the armrest lifting keel f1, the lifting adjusting linkage rod f7 is arranged in a hollow area in the armrest lifting keel f1, the lifting adjusting linkage rod f7 comprises a transverse rod body f71 and a longitudinal rod body f72 which is integrally connected with the rear end part of the transverse rod body f71 and extends downwards, a button part f710 is integrally connected with the lower side of the transverse rod body f71, the button part f710 can downwards penetrate out of the armrest lifting keel f1, a lifting adjusting clamping block f720 is integrally connected with the rear side part of the longitudinal rod body f72, the lifting adjusting clamping block f720 backwards penetrates out of the armrest lifting keel f1, a row of lifting adjusting ports f00 which are vertically arranged at intervals and are longitudinally penetrated in a front-back manner and are used for clamping the lifting adjusting clamping blocks f720, the lifting adjusting spindle f73 which extends left and right and is used for enabling the lifting adjusting linkage rod f7 to rotate to conduct lifting adjustment is fixed at the position where the transverse rod body f71 and the longitudinal rod body f72 are integrally connected, the lifting adjusting spindle f73 is installed and erected in the handrail lifting keel f1, the button position f710 is located on the front side of the lifting adjusting spindle f73, the lifting adjusting linkage rod f7 deflects around the lifting adjusting spindle f73 through pressing the button position f710 upwards on the front side, the longitudinal rod body f72 moves forwards and downwards, the lifting adjusting clamping block f720 is separated from the lifting adjusting opening f00, the handrail lifting keel f1 can move up and down freely in the handrail outer sleeve f, when the handrail lifting adjusting linkage rod f710 is moved to the corresponding position, the lifting adjusting linkage rod f7 is reset, and the lifting adjusting clamping block f720 is clamped into the corresponding lifting adjusting opening f00 to complete positioning.

Then, in order to better reset the lifting adjusting linkage rod f7, the following design is made: and a lifting adjusting spring f77 extending up and down is abutted between the upper side part of the transverse rod body f71 positioned at the button part f710 and the lower surface part of the handrail substrate supporting plate f 2. Further, an upper spring sleeve f771 for sleeving the upper end of the lifting adjusting spring f77 is formed on the lower surface part of the handrail base supporting plate f2, a lower spring sleeve f772 for sleeving the lower end of the lifting adjusting spring f77 is formed on the upper side part of the transverse rod body f71, the ends of the springs are limited up and down, and the stability of the spring position is ensured.

Preferably, the outer side of the armrest lifting keel f1 is integrally connected with a lifting limiting block f101, the side part of the armrest outer sleeve f is provided with a lifting limiting groove f102 which extends up and down and is used for limiting lifting after the lifting limiting block f101 is inserted, and the limiting structure is used for ensuring that the armrest lifting keel f1 moves up and down on the armrest outer sleeve f to be limited and cannot fall out of the armrest outer sleeve f, so that the use safety is ensured.

Preferably, the backrest component comprises a middle backrest body y1 installed and connected at the front side of the front support keel 2, and a left backrest body y2 and a right backrest body y3 installed and connected at the left side and the right side of the front support keel 2 respectively, wherein the basic structures of the middle backrest body y1, the left backrest body y2 and the right backrest body y3 can be the same, the existing structure can be adopted, only the back of a human body can be relied on, or the spliced structure of the middle headrest in the embodiment is adopted, and the backrest component has different appearance, namely the spliced structure of the sponge cushion, the front side substrate and the rear frame is more practical. And the design of the three chair back bodies can better wrap the waist and abdomen of a human body, and the chair back is more comfortable and safe to use when the swinging function of the chair back is started.

Further, the middle chair back body y1, the left chair back body y2 and the right chair back body y3 can twist around the front support keel 2, human leaning is always moved, and the chair back structure with deformation capability is more comfortable. Then, the design may be made such that the middle chair back body y1, the left chair back body y2 and the right chair back body y3 are all connected with the front support keel 2 through the rubber connecting piece x, so that after the rubber connecting piece x with better strength is connected through the existing installation connection mode of the screws, the rubber connecting piece x has good torsion deformation capability because the rigidity of the rubber connecting piece x is not very high, so that a certain deformation capability can be provided, the rubber connecting piece x can be concave or L-shaped, has a certain torsion capability, and the torsion amplitude can be configured according to different crowds, and the connection mode of the rubber connecting piece x, the front support keel 2 and the chair back body is preferably detachable, so that the rubber connecting piece x is convenient to replace, and can meet more use requirements of users.

The present application also provides a chair comprising an armrest structure as described above, and the armrest structure is compatible with the armrest structure of embodiment 5, and the other parts of the chair can be constructed by adopting the structural design of other embodiments, so that the effect of the armrest applied to the chair with adjustable back and headrest is more optimized.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. The utility model provides a but rocking chair back structure, its characterized in that includes main support fossil fragments (1) front side installation is connected with preceding support fossil fragments (2) and is used for with seat support fixed connection and supplies after main support fossil fragments (1) installation can make bottom fossil fragments (3) that main support fossil fragments (1) swayd side by side, install the back of the chair subassembly on preceding support fossil fragments (2), be connected with on bottom fossil fragments (3) in the axial fore-and-aft direction and support axle sleeve (31) that can swayd side by side after main support fossil fragments (1) cover are established, it runs through and cover is established to have offered on main support fossil fragments (1) the rocking cover on support axle sleeve (31) is established hole (11), be provided with between bottom fossil fragments (3) and main support fossil fragments (1) and be used for carrying out switching device to the switching over of the switching state of main support fossil fragments (1) swaying side by side.

The switch device comprises an unlocking hole (101) which is arranged on the main support keel (1) near the bottom part and is vertically arranged, and a locking bolt (301) which is arranged on the bottom keel (3) and can be lifted up and down to finish the closing and opening of the left-right swinging function of the main support keel (1) in a mode of entering and exiting the unlocking hole (101);

The bottom keel (3) is provided with a stay wire (302) which is pulled to enable the locking bolt (301) to descend and separate from the unlocking hole (101) and an elastic reset device which can enable the locking bolt (301) to ascend and enter the unlocking hole (101) to reset after the stay wire (302) is retracted;

The elastic resetting device comprises a swinging function switch switching spring (303) sleeved on the locking bolt (301);

The locking bolt (301) is provided with a top inserting portion (3011) which is inserted into the unlocking hole (101) upwards, a limiting sleeve (3012) which is used for abutting and limiting the upper portion of the swinging function switch switching spring (303) is sleeved and fixed on the periphery of a portion, below the top inserting portion (3011), of the locking bolt (301), the lower portion of the swinging function switch switching spring (303) abuts against the upper surface of the top substrate (41), and the swinging function switch switching spring (303) is located between the limiting sleeve (3012) and the top substrate (41).

2. The rocking chair back structure according to claim 1, wherein the elastic resetting means further comprises a fork (44) between the left base plate (42) and the right base plate (43) and below the top base plate (41) for driving the locking pin (301) to move downward, one end of the pull wire (302) is connected with the fork (44) as a connecting end (3021), and the other end of the pull wire (302) is an operating end (3022).

3. The rocking chair back structure according to claim 2, wherein the locking pin (301) has a lower insertion portion (3013) penetrating downward through the top base plate (41) and located below the top base plate (41), the lower insertion portion (3013) is provided with a left-right extending toggled shaft (30133) in a penetrating manner, the left end of the toggled shaft (30133) is inserted into the left base plate (42) and can move up and down, the right end of the toggled shaft (30133) is inserted into the right base plate (43) and can move up and down, the left base plate (42) is provided with a left lifting guide groove (421) extending up and down for inserting the left end of the toggled shaft (30133), the right base plate (43) is provided with a right lifting guide groove (431) extending up and down for inserting the right end of the toggled shaft (30133), the toggled shaft (44) comprises a left lifting guide groove (431) located above the toggled shaft (30133) and capable of moving up and down, and a right lifting guide groove (4411) is formed against the toggled shaft (4412) of the left base plate (444), the left toggle clamp (4411) is arranged between the lower inserting part (3013) and the left side base plate (42) and is positioned above the part of the toggled shaft lever (30133) between the lower inserting part (3013) and the left side base plate (42), the left toggle clamp (4411) can be abutted up and down with the part of the toggled shaft lever (30133) between the lower inserting part (3013) and the left side base plate (42), the right toggle clamp (4412) is positioned between the lower inserting part (3013) and the right side base plate (43) and is positioned above the part of the toggled shaft lever (30133) between the lower inserting part (3013) and the right side base plate (43), the right toggle clamp (4412) can be abutted up and down with the part of the toggled shaft lever (30133) between the lower inserting part (3013) and the right side base plate (43), the toggle plate (441) is integrally connected with the toggle end (442) positioned below the toggle plate (3022) and the pull wire (442) is connected with the pull wire (442).

4. A rocking chair back structure according to claim 3, wherein the upper end of the dial-down plate (442) is integrally connected with the front end of the dial-up plate (441) and a fork driving shaft (443) extending from left to right for rotation of the fork (44) is provided at the integral connection, the dial-down plate (442) is inclined downward and rearward when the rocking function of the main supporting keel (1) is in the closed state, and the wire (302) is positioned in front of the dial-down plate (442).

5. The rocking chair back structure according to claim 1, wherein a rocking return spring (1000) for the rocking buffering and resetting of the main support keel (1) extending from side to side is arranged in the main support keel (1), and a side to side rocking blocking stop lever (1001) which penetrates the main support keel (1) forward and is blocked in a position between the left end and the right end of the rocking return spring (1000) near the front end is fixed on the bottom keel (3).

6. A chair characterized by comprising a rocking chair back structure according to any one of claims 1-5, and further comprising a seat (z) positioned in front of the bottom keel (3) and fixed to the bottom keel (3), wherein the seat (z) is provided with a left-right rocking function adjusting handle (z 1) connected with an operation end (3022) of the stay wire (302) and used for pulling and retracting the stay wire (302).