KR200385118Y1 - apparatus for adjusting a tilting range of a tiltingchair - Google Patents

Abstract

The tilting range adjusting device of the tiltable chair according to the present invention has a tilting case in which a tilting mechanism is coupled to the lower side of the seat plate, and a back connector is connected to the tilting mechanism of the tilting case, and is connected to the back connector. In the connected tiltable chair, a hinge shaft 116 to which the back connector is connected, a bush bracket 118 coupled to and supporting the hinge shaft, and coupled to an outer side of the bush bracket to adjust the tilting angle. A locking lever coupled to the limit gear 120 and the limit gear through the bush bracket so as to intermittently slide outwardly of the bush bracket to be locked to the limit gear to adjust the tilting angle and to lock to a predetermined tilting angle. And a tilting angle adjustment cam 126 having a gear that is bitten by the limit gear, and the hinge shaft. Since it includes an arm 128 that protrudes and is brought into close contact with the contour of the cam selectively in accordance with the rotation of the cam, the lever is operated to adjust the tilting range and to lock simultaneously to facilitate the operation and to use the cam mechanism. It has the effect of smooth operation.

Description

Apparatus for adjusting a tilting range of a tilting chair}

The present invention relates to a tilting range adjustment device of the tiltable chair.

In general, the chair is coupled to the back plate and the seat plate at a predetermined angle, and the legs are coupled to the lower side of the seat plate. In order to do so, the back is tilted backwards.

The technique of adjusting the tilting range of the chair in the conventional tiltable chair, the back of the chair is always fixed to the fixed position by the locking cam adjusted by adjusting the lever up and down so that the gear is locked to the locking cam at a predetermined position. . That is, the tilting range adjusting unit that adjusts the conventional tilting range, when the user is seated and leans back the back, the predetermined angle range (for example, 0 to 20 to the end to the end, or a specific point (5 degrees, 10 degrees, 15 degrees) (20 degree point), the back plate is fixed and does not move in a structure that works.Therefore, there is a problem that the back plate cannot be tilted in various ranges according to various preferences and physical conditions of the user.

In order to solve this problem, the tilting range adjusting device of the tiltable chair capable of tilting the backrest in various ranges has been registered as Korean Utility Model Registration No. 0315979. The tilting range adjusting device disclosed in the Utility Model Registration No. 0315979 is applied to the tiltable chair shown in FIG. 1, and is installed inside the tilting case as shown in FIG. 2.

As shown in FIG. 1, the tilting case 18 is fixed to the rotary shaft 16 of the chair leg 14 at the lower side of the seat plate 12, and the back connector 36 is installed at the rear side of the seat plate 12. The back plate 20 supporting the user's back is installed, and the first hinge shaft 24 is hinged to the lower front of the seat plate 12, and the second hinge shaft (behind the rear plate of the seat plate 12). 26 is hinged, a third hinge shaft 28 is hinged to the front of the tilting case 18, the fourth hinge shaft 30 is hinged to the rear of the tilting case 18, The first hinge shaft 24 and the third hinge shaft 28 are connected by the front link 32, and the second hinge shaft 26 and the fourth hinge shaft 30 are connected by the rear link 34. In connection, the seat plate 12, the tilting case 18, the front link 32 and the rear link 32 is a kinematic linkage mechanism.

As shown in FIG. 2, the third hinge shaft 28 is supported at the front of the tilting case 18, and the fourth hinge shaft 30 is supported at the rear of the tilting case 18. The middle portion of the third hinge shaft 28 is provided with a back restoring elastic body 38 for restoring the back plate 20 by applying a restoring force to the front link 32 and the back connector 36. One side of the shaft 28 is coupled to the front locking portion 40 for selectively restraining the inclination of the back plate 20 forward, one side of the back restoring elastic body 38 to change the elastic strength of the back restoring elastic body Tilting strength adjustment unit 50 for adjusting the tilting strength is coupled. The other side of the third hinge shaft is coupled to a tilting range adjusting device 60 for adjusting the tilting range of the back plate 20.

The tilting range adjusting device 60 is fixed to the third hinge shaft 28 and protrudes in the radial direction of the third hinge shaft, and the end portion of the tilting hole 62 rotates sequentially. A stopper 64 having a plurality of locking jaws formed in a stepped manner so as to be fastened to the floor, a rack gear 72 provided on the stopper 64, a pinion 74 snapped onto the rack gear 72, and the pinion ( A rotating shaft 76 for rotating 74 and a handle 78 coupled to the opposite side to which the pinion 74 is coupled to the rotating shaft 76 are provided.

However, the conventional tilting range adjusting device configured as described above includes a stopper 64 having a plurality of stopping jaws that are sequentially caught at the ends thereof while the locking hole 62 rotates, and the rack gear 72 is provided on the stopper 64. And, because the structure to adjust the tilting range by rotating the pinion 74 by a separate handle 78, it is inconvenient to operate due to the separate handle and rack and pinion for adjusting the tilting range, and the operation is inconvenient. There was a problem that you do not want.

Accordingly, the present invention has been made to solve the above problems, the object of the present invention is to adjust the tilting range by operating the lever to lock at the same time to facilitate the operation and the tilting to facilitate the operation using the cam mechanism It is to provide a tilt range adjustment device of the chair.

The tilting range adjustment device of the tiltable chair according to the present invention for achieving the above object, the tilting case is coupled to the tilting mechanism therein is coupled to the lower side of the seat plate, the tilting mechanism of the tilting case is connected to the back connector A tiltable chair having a back plate connected to the back connector, comprising: a hinge shaft to which the back connector is connected, a bush bracket coupled to the hinge shaft to support the back shaft connector, and coupled to an outer side of the bush bracket to adjust the tilt angle. A limit gear and a locking lever coupled to the limit gear through the bush bracket so as to intermittently slide along the outside of the bush bracket to be locked to the limit gear to adjust the tilting angle and to lock at a predetermined tilting angle; A tilting angle adjusting cam having a gear bited by a limit gear, and To protrude from the shaft in accordance with rotation of said cam includes an arm applied by selectively close contact with the surface contour of the cam.

The limit gear and the locking lever are connected to each other by a limit pin penetrating the bush bracket, and the bush bracket portion through which the limit pin penetrates has a long hole through which the limit pin moves according to the rotation of the locking lever. On the other hand, the locking grooves are formed at predetermined intervals by the locking holes intermittently in close contact with the long holes.

The latch is fitted to the outside of the limit pin, the spring is applied to one side of the latch is applied to the elastic force.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 3, the tilting case 108 is fixed to the rotation shaft 106 of the chair leg 104 at the lower side of the seat plate 102, and the user is connected to the rear side of the seat plate 102 by a back connector. The back plate 110 is installed to support the back, and both sides of the seat plate 102 is provided with an armrest 112 that is capable of height adjustment. In addition, the back plate of the back plate 102 is provided with an auxiliary back plate 114 that supports the lumbar spine of the user by the auxiliary back connector.

Inside the tilting case 108, in addition to the tilting range adjusting device for adjusting the tilting range of the back plate, a back restoring elastic body for restoring the back plate is installed, and a tilting for adjusting the tilting strength by changing the elastic strength of the back restoring elastic body. A strength adjustment unit, a front locking unit for locking the back plate not to be inclined more than a predetermined angle to the front is installed, the auxiliary plate restoring elastic body for restoring the auxiliary back plate, lumbar support strength adjustment unit for adjusting the strength of the lumbar support, the auxiliary A lumbar support locking part may be additionally installed to prevent the back plate from tilting forward more than a predetermined angle. Hereinafter, only the tilting range adjusting device will be described in detail. The remaining general configuration installed in the tilting case is disclosed in Korean Patent Laid-Open No. 2004-0049039.

As shown in FIG. 4, a hinge shaft 116 is installed at the front of the tilting case 108 through which the back plate 110 is connected through the back connector, and the hinge shaft 116 has a bush bracket for supporting it. 118: see Fig. 6) is coupled, the limit gear 120 is coupled to the outside of the bush bracket 118 to adjust the tilting angle, and fixed to the limit gear 120 to adjust the tilting angle The locking lever 122 is coupled to the limit gear 120 through the bush bracket 118 so as to intermittently slide along the outside of the bush bracket 118 so as to lock at a tilting angle. At the rear side, a tilting angle adjustment cam 126 having a gear 124 bited by the limit gear 120 is installed.

On the outer surface of the hinge shaft 116, an arm 128 is formed to protrude in close contact with the contour surface of the cam as the cam 126 rotates. The arms 128 are formed on both sides so as to maintain balance when the hinge shaft 116 rotates, and the tilting angle adjusting cams 126 are also provided on both sides so that the arms on both sides are in close contact with each other. 130). A gear is not formed in the arm of one side (right side in drawing).

6 and 8, the bush bracket 118 protrudes from the outer surface of the semi-cylindrical portion 132 in close contact with the outer surface of the hinge shaft 116 in the form of a reinforcing flange. It is structured.

The limit gear 120 and the locking lever 122 are connected and fixed to each other by limit pins 136 penetrating through the out bush portion 134 of the bush bracket 118, and the limit pins 136 are fixed to each other. A long hole 134a through which the limit pin 136 moves as the locking lever 122 rotates is formed in the out-bush part 134 that penetrates, and a locking hole 138 is formed along the long hole 134a. Interlocking grooves 134b that are intermittently in close contact are formed at predetermined intervals. The out bush portion 134 has a hole 134c in which the cam shaft 130 is installed.

The limit gear 120 is in the form of an arc plate with gear teeth formed on a portion of the arc surface. In addition, the gear 124 is a cylindrical gear and is formed integrally with the cam 126 or manufactured as a separate gear to be fixed to the cam shaft 130.

As shown in FIGS. 6 and 7, the locking lever 122 is divided into two sides (upper and lower sides) of the cylindrical portion 140 to surround and assemble the semi-cylindrical portion 132 of the bush bracket 118. The handle portion 142 protrudes from the cylindrical portion 140. A plurality of ribs 140a are formed inside the cylindrical portion 140 to increase the rigidity while the semi-cylindrical portion 132 is fitted, and the limit pin 136 is fitted to the outside of the cylindrical portion 140. The connecting portion 140b is formed.

The tilting angle adjusting cam 126 has a polygonal cylindrical shape having a plurality of flat surfaces in which the distance from the center to which the cam shaft 130 is fitted is increased or decreased sequentially.

The latch 138 is fitted to the outside of the limit pin 136, a spring 142 for applying an elastic force is installed on one side of the latch 138. One end of the locking hole 138 is formed with an inclined surface or a chamfer (chamfer) to be easily caught in the locking groove (134b).

In the tilting range adjustment device of the tiltable chair according to the present invention configured as described above, as shown in FIGS. 5 and 6, when the locking lever 122 is rotated, the latch 138 coupled to the limit pin 136 is provided. The intermittent engagement with the locking groove 134b causes the limit gear 120 to rotate, and the cam 126 coupled to the limit gear 120 through the gear 124 rotates to the arm 128. The position of the flat surface of the cam in contact with is changed. Therefore, when the hinge shaft 116 is rotated by the user sitting on the seat, the range of the arm 128 that is caught on the flat surface of the cam is changed, thereby changing the tilting angle.

This tilting angle adjustment state is shown in Figs. 9a to 9d. That is, the cam 126 is rotated through the limit gear 120 and the gear 124 according to the degree of rotating the locking lever 122 in the counterclockwise direction so that the flat surface located above the cam 126 is different. As a result, the arm 128 can be brought into contact with the flat surface of the cam at angles of 2 degrees, 7 degrees, 12 degrees and 17 degrees in the reference state, thereby changing the tilting angle.

According to the tilting range adjusting device of the tiltable chair according to the present invention, the lever is operated to adjust the tilting range and lock at the same time, thereby making it easy to operate and using the cam mechanism.

1 is a schematic configuration diagram showing a tiltable chair to which a conventional tilting range adjusting device is applied;

Figure 2 is a perspective view showing the inside of the tilting case is installed tilting range adjustment device of Figure 1,

3 is a schematic configuration diagram showing a tiltable chair to which the tilting range adjusting device according to the present invention is applied;

Figure 4 is a perspective view showing the inside of the tilting case is installed tilting range adjustment device of FIG.

FIG. 5 is a perspective view of the hinge shaft and the cam shaft separated from FIG. 4; FIG.

Figure 6 is an exploded perspective view of the locking lever and the bushing bracket of Figure 5,

Figure 7 is a perspective view of the locking lever and the bushing bracket of Figure 5,

Figure 8 is a side view of the bush bracket of Figure 6,

9a to 9d is a state diagram of the operation of the tilting range adjustment device of the tiltable chair according to the present invention.

<Description of the symbols for the main parts of the drawings>

108: tilting case 116: hinge axis

118: bush bracket 120: limit gear

122: locking lever 124: gear

126: cam for tilting angle adjustment 128: arm

130: camshaft 136: limit pin

138: latch 142: spring

Claims (3)

In a tilting chair having a tilting mechanism coupled to a tilting mechanism therein, and a back connector connected to the tilting mechanism of the tilting case, and a back plate connected to the back connector. A hinge shaft to which the back connector is connected; A bush bracket coupled to the hinge shaft to support the hinge shaft, a limit gear coupled to the outside of the bush bracket to adjust a tilting angle, A locking lever secured to the limit gear to adjust the tilting angle and coupled to the limit gear through the bush bracket so as to intermittently slide along the outside of the bush bracket to lock to a predetermined tilting angle; A tilting angle adjusting cam having a gear snapped to the limit gear; And an arm that protrudes from the hinge axis and is in close contact with the contour surface of the cam according to the rotation of the cam. The method of claim 1, The limit gear and the locking lever are connected to each other and fixed by a limit pin passing through the bush bracket, In the bush bracket portion through which the limit pin penetrates, a long hole through which the limit pin moves is formed according to the rotation of the locking lever, and a locking groove is formed at predetermined intervals by the locking hole intermittently in close contact with the long hole. Tilting range adjustment device of the tiltable chair. The method of claim 2, The latch is fitted to the outside of the limit pin, Tilting range adjustment device of the tiltable chair, characterized in that the spring is applied to one side of the latch is applied to the elastic force.