CN108072953B

CN108072953B - First lens adjusting mechanism, lens adjusting module and projection equipment

Info

Publication number: CN108072953B
Application number: CN201611005080.5A
Authority: CN
Inventors: 于广军; 黄思尧; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2016-11-15
Filing date: 2016-11-15
Publication date: 2023-12-08
Anticipated expiration: 2036-11-15
Also published as: CN108072953A; WO2018090767A1

Abstract

The invention provides a first lens adjusting mechanism, a lens adjusting module and projection equipment, wherein the first lens adjusting mechanism respectively comprises a first bracket and a second bracket which are connected in an adjustable and movable way and provided with a first communication hole and a second communication hole for a light beam or a lens to pass through, and the first bracket or the second bracket is fixedly connected with the lens. The first lens adjusting mechanism is further provided with a plurality of adjustable connecting components which comprise first threaded connecting pieces and elastic pieces, a plurality of first frame holes which are in one-to-one correspondence and comprise through holes and second frame holes which are provided with first threaded holes are respectively arranged on the first support and the second support, the first threaded connecting pieces penetrate through the first frame holes and the free ends of the first threaded connecting pieces are connected with the first threaded holes, the elastic pieces are arranged between the first support and the second support in a compressed mode, and the first threaded connecting pieces and the elastic pieces work together to adjust the relative distance between the first support and the second support. The invention can obtain abundant adjustment degrees of freedom, and has high adjustment precision and quick adjustment mode.

Description

First lens adjusting mechanism, lens adjusting module and projection equipment

Technical Field

The present invention relates to the field of optical technologies, and in particular, to a first lens adjustment mechanism, a lens adjustment module, and a projection apparatus.

Background

In conventional projection devices, the lens is often fixed and the user can only adjust the position of the projected image by adjusting the relative position or angle of the projection device to the screen. Therefore, in order to project a suitable image in the screen, the user has to spend a considerable amount of time and effort positioning the projection device to adjust the projection to the appropriate position or angle in the screen. In addition, when the lens and the light beam from the light source do not achieve good focusing, since the lens is fixed, the focusing condition cannot be improved by adjusting the position of the lens, thereby causing the sharpness of the image projected onto the screen by the lens to be adversely affected.

In order to solve the above-mentioned problems, there is a projection apparatus configured to adjust the position of a lens as a projection lens by using a lens adjustment structure including a horizontal slider and a vertical slider, the movement of which is realized by using a manual mechanical driving mechanism, the horizontal slider and the vertical slider being capable of adjusting the position of the lens only in the horizontal and vertical directions, respectively, and the degree of freedom of adjustment is small, and in particular, the position adjustment of the lens in the direction perpendicular to the horizontal or vertical direction is impossible; the mechanical driving mechanism occupies large space and has large noise, is limited by the minimum stroke, and cannot be adjusted relatively slightly, so that the accuracy of adjusting the lens position is not high, and in addition, the adjusting mode is not quick and simple.

Therefore, in order to overcome the shortcomings of the prior art, it is needed to provide a first lens adjusting mechanism capable of adjusting the position of the lens relatively slightly, a lens adjusting module and a projection device with high adjusting precision, a fast adjusting mode, a compact structure and low noise.

Disclosure of Invention

In view of this, the present invention provides a first lens adjusting mechanism, a lens adjusting module having the first lens adjusting mechanism, and a projection apparatus, so as to solve the technical problems of less adjustment degrees of freedom, low adjustment precision, and not fast adjustment modes of the existing lens adjusting structure.

In order to achieve the above object, the present invention provides the following technical solutions: the first lens adjusting mechanism comprises a first bracket and a second bracket which are connected in an adjustable and movable way, the first bracket and the second bracket are respectively provided with a first communication hole and a second communication hole for a light beam or a lens to pass through, and one of the first bracket and the second bracket is fixedly connected with the lens. The first lens adjusting mechanism further comprises a plurality of adjustable connecting components, each adjustable connecting component comprises a first threaded connecting piece and an elastic piece, a plurality of first frame holes which all comprise through holes are formed in the first support, a plurality of second frame holes which are in one-to-one correspondence with the first frame holes and are provided with first threaded holes are formed in the second support, the plurality of first threaded connecting pieces, the plurality of first frame holes and the plurality of second frame holes are arranged in one-to-one correspondence, the free end of each first threaded connecting piece is provided with first external threads which are used for being connected with the corresponding first threaded holes, the first threaded connecting pieces penetrate through the corresponding first frame holes, the elastic pieces are arranged between the first support and the corresponding second support in a compressed mode, and the first threaded connecting pieces and the elastic pieces act together to adjust the relative distance between the first support and the second support.

Further, the first shelf hole is a first stepped hole comprising a via hole, a first counterbore facing the second shelf and a first stepped surface between the via hole and the first counterbore. The second rack hole is a second stepped hole comprising a first threaded hole, a second counter bore facing the first bracket and a second stepped surface between the first threaded hole and the second counter bore. An elastic piece is sleeved on the periphery of the threaded rod, which is positioned between the first step surface and the second step surface, of the first threaded connecting piece.

Further, the first bracket and the second bracket have a first surface and a second surface facing each other, the elastic member is arranged between the first surface and the second surface in a compressed manner, at least one of the first surface and the second surface is provided with a convex column, and at least one free end of the elastic member is sleeved on the periphery of the convex column.

Further, the adjustable connecting assembly further comprises a cylindrical hollow hole sleeve with a first threaded hole and a second external thread, the second internal thread is arranged on the inner wall of the second frame hole, the second external thread is in threaded connection with the second internal thread, and the first external thread is in threaded connection with the first threaded hole.

Further, the first lens adjusting mechanism further comprises a positioning block and a gasket, the connectors of the positioning block and the first threaded connecting piece are cylinders with concave portions, the first frame hole comprises a through hole and a second threaded hole which is opposite to the second bracket and communicated with the through hole, and third external threads connected with the second threaded hole are arranged on the periphery of the positioning block. A gasket is clamped between the positioning block and the connector, a bulge is arranged on the periphery of the gasket, a non-through groove extending from the free end along the direction away from the free end is formed in the first frame hole, the bulge is inserted into the groove, and the positioning block applies a pressing force to the connector by the gasket.

Further, a plurality of rib plates are arranged on the first bracket at equal intervals along the circumferential direction of the first communication hole, holes are formed between every two adjacent rib plates, and the plurality of holes are used for enabling a plurality of corresponding protrusions of the lens to pass through and rotate by a certain angle so that the plurality of rib plates are clamped with the plurality of protrusions.

Still further, the first lens adjustment mechanism further comprises an annular elastic piece, the annular elastic piece is arranged on the surface of the first support facing the second support, the annular elastic piece comprises a planar annular main body and a plurality of elastic arms which are uniformly distributed on the inner side of the annular main body, each elastic arm comprises a connecting arm connected with the inner side of the annular main body and an extension arm which extends along the circumferential direction by the connecting arm, each extension arm is provided with an arch part which is elastically abutted to the protrusion, and each extension arm and each rib plate are respectively arranged oppositely.

Further, the first support is a hollow approximately circular ring body plate, the first support holes are formed in three and are arranged in the circular ring body at equal angles relative to the center of the first support, and the second support is provided with three second support holes corresponding to the three first support holes.

In order to achieve the above another object, the present invention provides a lens adjusting module, which includes a base mechanism, a second lens adjusting mechanism and the first lens adjusting mechanism that are sequentially stacked and connected. The lens adjusting module further comprises a first electric driving mechanism and a second electric driving mechanism, wherein the first electric driving mechanism is in transmission connection with the first lens adjusting mechanism and drives the first lens adjusting mechanism so that the first lens adjusting mechanism directly drives the lens to move along a first direction, and the second electric driving mechanism is in transmission connection with the second lens adjusting mechanism and drives the second lens adjusting mechanism so that the lens is indirectly driven to move along a second direction perpendicular to the first direction by means of the first lens adjusting mechanism. The base mechanism comprises a base main body, the second lens adjusting mechanism comprises a third support, the third support and the base main body respectively comprise a third communication hole and a fourth communication hole, and the first communication hole of the first support, the second communication hole of the second support, the third communication hole and the fourth communication hole are approximately concentric and are all used for allowing a lens to pass through.

Further, two groups of first supporting portions are arranged on the base body along the second direction, the second lens adjusting mechanism comprises a first sliding rod supported by the first supporting portions and inserted into the third support and two groups of second supporting portions arranged on the third support along the first direction, the first lens adjusting mechanism comprises a second sliding rod supported by the second supporting portions and inserted into the second support, and the third support and the second support move under the guidance of the first sliding rod and the second sliding rod respectively.

Still further, the first lens adjusting mechanism and the second lens adjusting mechanism each comprise a plurality of threaded fixing pieces, the two groups of first supporting parts and the two groups of second supporting parts are respectively two pairs of first bosses and two pairs of second bosses, and the first bosses and the second bosses are provided with inverted trapezoid surfaces or arc surfaces. The first slide bar and the second slide bar are both approximately cylindrical bars comprising free ends with notches and D-shaped cross sections, each free end comprises an arc surface and a compression joint surface formed by the notches, through holes are formed between the arc surfaces and the compression joint surfaces, the arc surfaces are abutted against the first boss and the second boss, and each threaded fixing piece penetrates through the arc surfaces through the through holes to be connected with threaded fixing holes on the first boss and the second boss and abutted against the compression joint surfaces.

Still further, the first electric drive mechanism comprises a first motor and a first screw in driving connection, and the second electric drive mechanism comprises a second motor and a second screw in driving connection. The first screw and the second screw are respectively connected with the second bracket and the third bracket in a transmission way, and the first motor and the second motor are respectively and fixedly connected with the third bracket and the base main body through a first fixing piece and a second fixing piece which are both approximately L-shaped.

Still further, the base mechanism still includes a pair of pole fixed subassembly that is used for fixed second screw rod both ends, and pole fixed subassembly includes the support that sets up on the base main part and with support fixed connection's apron, the support has the fluting that holds the axle sleeve, and the apron is fixed in the fluting with the axle sleeve, and the opposite both ends of second screw rod are pegged graft respectively in the axle sleeve.

Still further, the third bracket includes a first protruding portion including a first through groove for the second screw to pass through, which is extended from a first side surface of the third bracket in order away from the third communication hole and in a direction parallel to the first direction, in which a first transmission block screwed with the second screw is fixed, the first transmission block being abutted against one of a pair of first groove surfaces of the first through groove opposite in the second direction under the driving of the second screw, so as to drive the first protruding portion to move by applying a force to one of the first groove surfaces.

Still further still, the first protruding portion still includes the through-hole that is located between third intercommunicating pore and the first logical groove, supplies first slide bar to pass, is equipped with a pair of first sliding sleeve that has first guide hole on the second side that third support and first side are relative, and first sliding sleeve cup joints in the periphery of first slide bar, is equipped with respectively on a pair of relative third sides of second support and has the slide cylinder that supplies the second slide bar to pass, is equipped with a second sliding sleeve in the inside at slide cylinder both ends respectively, and the second sliding sleeve cover is established on the second slide bar.

Still further, the second support still includes a pair of fourth side that is opposite, is equipped with a pair of protruding arm that has the clearance on one of them fourth side surface, is equipped with at least one first trompil on each protruding arm, and first lens adjustment mechanism still includes connecting plate and connection mounting, and the connecting plate has a pair of extension boards, is equipped with at least one second trompil that corresponds with first trompil on each extension board, and the swivel nut with first screw rod complex that sets up between a pair of extension boards is arranged in the clearance, and connection mounting is used for connecting corresponding first trompil and second trompil.

Still further, be equipped with matched with first opening and first photoelectric sensor on third support and second support respectively, be equipped with matched with second opening and second photoelectric sensor on base main part and third support respectively, first opening extends along first direction, and the second opening extends along the second direction, and each photoelectric sensor includes luminous portion and light receiving portion, and the opening allows the detection light that the luminous portion of matched with sent to pass through and received by light receiving portion.

In order to achieve the above object, the present invention provides a projection apparatus, which includes a lens, a lens connecting frame, a light machine, and the lens adjusting module, wherein the lens is fixedly connected with the first bracket, the base body is connected with the light machine through the lens connecting frame, and a light transmitting portion for transmitting and injecting a light beam emitted from the light machine into the lens is disposed on a frame plate of the lens connecting frame far from the base body.

Compared with the prior art, the technical scheme provided by the invention has the following advantages:

on the one hand, the relative positions of the first bracket and the second bracket are adjusted through the first lens adjusting mechanism, so that the positions of lenses which are relatively and fixedly connected with the first bracket or the second bracket can be adjusted, in addition, a plurality of adjustable connecting components are selectively operated, a sufficient degree of freedom of adjustment can be obtained, and in addition, the relative positions of the first bracket and the second bracket are adjusted through the first threaded connecting piece, so that the adjustment precision is high, and the adjustment mode is quick.

On the other hand, the base mechanism, the first lens adjusting mechanism and the second lens adjusting mechanism are arranged in a stacked mode, so that the lens adjusting module is compact in structure and small in occupied space, the first electric driving mechanism and the second electric driving mechanism respectively drive the first lens adjusting mechanism and the second lens adjusting mechanism, the first lens adjusting mechanism drives the second lens adjusting mechanism in the moving process, the position of the lens in the first direction is adjusted indirectly through the second lens adjusting mechanism, the position of the lens in the second direction perpendicular to the first direction is adjusted directly through the second lens adjusting mechanism, the adjustment of the position of the lens is guaranteed to be high in precision and good in stability, and the adjustment precision can be further improved through the first lens adjusting mechanism on the basis of adjustment through each electric driving mechanism.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a first lens adjusting mechanism according to an embodiment of the present invention;

FIG. 2 is an exploded view of the first lens adjustment mechanism shown in FIG. 1;

fig. 3 and 4 are schematic structural views mainly showing two different view directions of a first bracket of a first lens adjusting mechanism according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram mainly illustrating a second bracket of the first lens adjusting mechanism according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an unassembled lens of a lens adjustment module according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a base mechanism of a lens adjusting module according to an embodiment of the present invention;

fig. 8 is a schematic diagram mainly illustrating a structure of a second lens adjusting mechanism of the lens adjusting module according to an embodiment of the invention;

Fig. 9 is a schematic structural view mainly showing an assembled state of a base mechanism, a second lens adjusting mechanism and a first electric driving mechanism of a lens adjusting module according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram mainly illustrating a first lens adjusting mechanism of a lens adjusting module according to an embodiment of the present invention;

FIG. 11 is a schematic diagram mainly illustrating a connection state between a second lens adjusting mechanism and a lens connecting frame of a lens adjusting module according to an embodiment of the present invention;

reference numerals illustrate:

1000—a lens adjustment module; 100—a base mechanism; 110—a base body; 111-first protrusions; 112-a second opening; 113-a fourth communication hole; 120-a first boss; 121—a threaded fixation hole; 130- -a support; 131- -slotting; 132—a sleeve; 133-cover plate;

200—a second lens adjustment mechanism; 210—a third bracket; 211-a first protrusion; 212- -through slots; 213- -a via; 214-a second protrusion; 215-a first opening; 216-a third communication hole; 220—a first slide bar; 221-notch; 222- -arc surface; 223—a crimp face; 224- -a through hole; 230-a second boss; 240—a first drive block; 250—a first sliding sleeve; 260-a second photosensor;

300—a first lens adjustment mechanism; 310—a first bracket; 311-first communication holes; 312—a first rack aperture; 312a—vias; 312b—a first counterbore; 312C-first step surface; 312d—a positioning block; 312e—a gasket; 312F-a second threaded hole; 312g—grooves; 313-rib plates; 313a—a limit bump; 314- -opening a hole; 315—a paddle; 316- -hook; 320—a second bracket; 321-a second communication hole; 322-second rack aperture; 322a—a first threaded hole; 322b—a second counterbore; 322C-second step surface; 323-slide cylinder; 324—a second sliding sleeve; 325—a convex arm; 326- -a connection plate; 326a—a support plate; 326B- -a screw sleeve; 327- -a stopper; 328—a tab; an adjustable connection assembly 330; 331 a first threaded connection; 332—an elastic member; 333- -hollow bore sleeve; 340—a ring spring; 341—spring arms; 341a—a connecting arm; 341b—an extension arm; 341c—arches; 350-a second slide bar; 360—a first photosensor;

400-a first drive mechanism; 410-a first motor; 420—a first screw; 430—a first stator;

500—a second drive mechanism; 510-a second motor; 520-a second screw; 530—a second stator; 531-a second sub-fixing piece;

600—a lens connection frame; 610—a shelf; 620—a light transmitting portion;

SF- -threaded fastener.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings 1 to 11 and examples. It should be understood that the examples described below are only for explaining the present invention and are not intended to limit the present invention.

First lens adjusting mechanism embodiment

As an object of the present invention, a detailed description will be given below of an embodiment of a first lens adjusting mechanism 300 provided by the present invention, referring to fig. 1 to 5, the first lens adjusting mechanism 300 includes a first bracket 310 and a second bracket 320 which are adjustably and movably connected, the first bracket 310 and the second bracket 320 respectively have a first communication hole 311 and a second communication hole 321 through which a light beam or a lens (not shown) passes, one of the first bracket 310 and the second bracket 320 is fixedly connected with the lens, that is, when the first bracket 310 and the second bracket 320 are relatively displaced, one of the brackets fixedly connected with the lens will drive the lens to displace relative to the other bracket, and as will be known to those skilled in the art, the main structure of the lens generally includes a cylindrical frame in which a lens group is disposed, and a light-entering lens is disposed on a side of the frame receiving the light beam, and a light-emitting lens is disposed on a side of the barrel from which the light beam exits. In this embodiment, the first bracket 310 is fixedly connected to the lens, and the first bracket 310 is closer to the light-emitting lens of the lens than the second bracket 320 in the transmission direction of the light beam received by the lens. Further, in the case that the light beam passes through the first communication port and the second communication port, the frame of the lens close to the light-entering lens is fixedly connected with the first bracket 310, and in the case that the lens passes through the first communication port and the second communication port, the frame of the lens between the light-entering lens and the light-exiting lens is fixedly connected with the first bracket 310. In addition, for the understanding of the above-mentioned fixed connection, the first bracket or the second bracket may be directly and fixedly connected with the lens, or the first bracket or the second bracket may be indirectly and fixedly connected with the lens through some other component. The first lens adjusting mechanism 300 further includes a plurality of adjustable connection assemblies 330, where each adjustable connection assembly 330 includes a first threaded connection member 331 and an elastic member 332, and the elastic member is preferably a spring, and the spring has the advantages of being capable of sensitively generating corresponding elastic deformation due to different acting forces, having a large elastic deformation amount, being low in cost, and the like. The first bracket 310 is provided with a plurality of first bracket holes 312 each including a through hole 312A, wherein the first bracket holes 312 are integrally formed as through holes, preferably, the through holes 312A are formed as optical holes, the second bracket 320 is provided with a plurality of second bracket holes 322 corresponding to the first bracket holes 310 one by one and each having a first threaded hole formed therein, the second bracket holes 322 may be blind holes or through holes, in this embodiment, the second bracket holes 322 are through holes, and the plurality of second bracket holes are three or more. For the specific embodiment of the first threaded hole, threads may be directly provided on the inner peripheral wall of the second bracket hole 322, or a hollow hole sleeve (which will be further described below) with internal threads may be fixedly provided on the inner peripheral wall of the second bracket hole 322. The free end of the first threaded connector 331 is provided with a first external thread for connection with a first threaded bore. Further, the first threaded connector 331 includes a threaded rod and a connector, and the threaded rod may be integrally provided with the first external thread or a portion of the free end, which is provided with the first external thread for connecting with the first threaded hole and is close to the connector, is provided as a polish rod. The threaded rod has an outer diameter smaller than the inner diameter of the first shelf hole 312 and passes through the first shelf hole 312 including the via hole 312A, i.e., the threaded rod and the first shelf hole 312 can move relatively. The first threaded connector 331 may specifically be a screw, a stud, or the like, and in this embodiment, a stud is used. The first threaded connector 331 passes through the via 312A and the resilient member 332 is disposed in compression between the first bracket 310 and the second bracket 320, preferably the resilient member 332 is disposed between the opposing first and second bracket holes 312, 322 and the first threaded connector 331 passes therethrough (as will be further described below). The first screw connection 331 and the elastic member 332 cooperate to adjust the relative distance between the first bracket 310 and the second bracket 320, and it is understood that the first screw connection 331 simultaneously serves to connect the first bracket 310 and the second bracket 320 and adjust the distance between the first bracket 310 and the second bracket 320, and in addition, the distance between the first bracket 310 and the second bracket 320 is 0 when they are in contact. In more detail, the user can adjust the degree of compression of the elastic member 332 by rotating the first screw link 331 to adjust the stroke thereof in the first screw hole, that is, the relative spacing of the first and second holders 310 and 320 in the axial direction of the rotated first screw link 331, thereby achieving the technical effect of conveniently adjusting the lens position to bring the lens at an optimal position for receiving the light beam from the light source. In addition, since the plurality of corresponding first bracket holes 312, second bracket holes 322 and adjustable connection assemblies 330 are provided, that is, the number of each of the first bracket holes 312, second bracket 332 and adjustable connection assemblies 330 is the same, and the three are correspondingly provided, one or more first screw connectors 331 thereof can be flexibly selected for adjustment, so that a sufficient degree of freedom of lens adjustment can be obtained.

Referring to fig. 2, 4 and 5 in combination, in this embodiment, the first frame hole 312 is a first stepped hole including a via hole 312A, a first counter bore 312B facing the second bracket 320, and a first stepped surface 312C located between the via hole 312A and the first counter bore 312B, and the second frame hole 322 is a second stepped hole including a first threaded hole, a second counter bore 322B facing the first bracket 310, and a second stepped surface 322C located between the first threaded hole and the second counter bore 322B, it is known that the diameter of the first counter bore 312B is larger than the diameter of the via hole 312A, the diameter of the second counter bore 322B is larger than the diameter of the first threaded hole, and the elastic member 332 is sleeved around the outer circumference of the threaded rod located between the first stepped surface 312C and the second stepped surface 322C of the first threaded connector 331, that is, the outer circumferences of the first counter bore 312B and the second counter bore 322B respectively surround a free end of the elastic member 332, so that the elastic member 332 can be well positioned by the arrangement of the first stepped hole and the second stepped hole, and the elastic member 332 can be well deformed under the elastic force. Additionally, the first counterbore 312B and the second counterbore 322B are disposed on the first surface and the second surface of the first bracket 310 and the second bracket 320 facing each other, and a stopper 327 may be disposed on the first surface or the second surface, preferably, one stopper 327 is disposed at each of the positions of the second surface near the three second counterbore 322B, respectively, so as to control the minimum relative spacing of the first bracket 310 and the second bracket 320 allowed under the adjustment of the screw adjusting member, and to avoid deformation that may be caused by the interaction of the first bracket 310 and the second bracket 320.

As the first lens adjusting mechanism 300 of the alternative embodiment, the first holder 310 and the second holder 320 have a first surface and a second surface facing each other, the elastic member is compressively disposed between the first surface and the second surface, at least one of the first surface and the second surface is provided with a boss, preferably, at least one free end of the elastic member, such as a spring, has a hollow portion, and the hollow portion ferrules have a periphery of the boss, more preferably, the bosses have opposite two, both free ends of the elastic member have a hollow portion, and the hollow portions correspond to the ferrules have a periphery of the two bosses, and further, at least one boss is disposed in the vicinity of one of the opposite first and second frame holes, respectively, so that the elastic member can be well positioned and the elastic member can be made stable in operation.

Referring to fig. 2, further, the adjustable connection assembly 330 further includes a cylindrical hollow bore sleeve 333 having a first threaded bore 322A and a second external thread, the hollow bore sleeve 333 preferably being made of a wear resistant material such as stainless steel, cast iron, or the like, such as a wire sleeve made of stainless steel. The inner wall of the second frame hole 322 is provided with a second internal thread, the second external thread is in threaded connection with the second internal thread, and the first external thread is in threaded connection with the first threaded hole 322A. By providing the cylindrical hollow hole cover 333, it is possible to avoid the abrasion of the first screw hole by the first screw connector 331 in the screwing-in and unscrewing process in the first screw hole under the assumption that the first screw hole is directly provided on the inner peripheral wall of the second frame hole 322, the connection reliability of the first screw connector 331 and the first screw hole is improved, and the adjustment sensitivity of the first screw connector 331 is also improved.

Referring to fig. 2 and 3 in combination, it is preferable that the first lens adjusting mechanism 300 further includes a positioning block 312D and a spacer 312E, the connection head of the positioning block 312D and the first threaded connector 331 has a cylindrical head body with an inner concave portion, the inner concave portion may be formed as an inner hexagonal, so that the first threaded connector 331 is formed as a cylindrical head inner hexagonal stud, the first rack hole 312 includes a through hole 312A and a second threaded hole 312F facing away from the second bracket 320 and communicating with the through hole 312A, a third external thread connected with the second threaded hole 312F is provided at an outer periphery of the positioning block 312D, a spacer 312E is interposed between the positioning block 312D and the connection head, a protrusion is provided at an outer periphery of the spacer 312E, a non-through groove 312G extending from a free end in a direction away from the free end is provided at the first rack hole 312, the protrusion is inserted into the groove G, preferably, a hole diameter of the second threaded hole 312F is smaller than a hole diameter of the connection head of the first threaded connector 331, the connection head is located in the second threaded hole 312F, the spacer 312E is located in the second threaded hole 312F, and the spacer 312E is formed as a ring shape suitable for the spacer 312F. Therefore, the positioning block 312D applies a force along the extending direction of the groove 312G to the spacer 312E during the screwing process of the hexagonal screwdriver into the second threaded hole 312F to apply a pressing force to the connector of the first threaded connector 331 connected to the first threaded hole, so as to prevent the first threaded connector 331 from being separated from the first threaded hole, thereby preventing the disadvantage that the relative distance between the first bracket 310 and the second bracket 320 is accidentally changed due to the unavoidable vibration generated during the operation or transportation of the projection apparatus using the first lens adjusting mechanism 300.

Referring to fig. 3 and 4 in combination, as an embodiment for detachably and fixedly mounting the lens to the first lens adjusting mechanism 300, in this embodiment, a plurality of ribs 313 are provided on the first bracket 310 at equal intervals along the circumferential direction of the first communication hole 311, and an opening 314 is provided between every two adjacent ribs 313, and the plurality of openings 314 allow a corresponding plurality of protrusions of the lens to pass through and rotate by a certain angle so that the plurality of ribs 313 and the plurality of protrusions overlap each other and are in snap connection, so that the lens can be prevented from being separated from the first bracket 310 by interference fit of the ribs 313 and the protrusions in one-to-one correspondence. When the lens is required to be separated from the first bracket 310, the protrusions may be rotated in opposite directions so that the protrusions are completely staggered from the ribs 313 and opposite to the openings 314, and it is known that the rotation of the protrusions of the lens may be achieved by manually rotating the entire frame of the lens. Therefore, under the combined action of the adjusting first threaded connection 331 and the elastic member 332, the distance between the first bracket 310 and the second bracket 320 is changed, so that the first bracket 310 drives the lens to displace, thereby adjusting the position of the lens. Further, a limiting bump 313A is provided on a surface of one of the ribs 313 facing the second bracket 320, the limiting bump 313A is close to the adjacent opening 314 in the rotation direction of the plurality of protrusions, and the limiting bump 313A abuts against an end surface of one of the protrusions. Therefore, when the limiting bump 313A of the first bracket 310 abuts against the end surface of the protrusion of the lens, the limiting bump 313A can indicate each protrusion of the lens to pass through each opening 314 and then rotate in place, so as to avoid the excessive or insufficient rotation angle of the protrusion of the lens and ensure that the plurality of rib plates 313 and the plurality of protrusions are well clamped with each other. In order to better fixedly connect the first bracket 310 with the lens, further, a fastening mechanism is provided on the first bracket 310, the fastening mechanism includes a pulling piece 315 and a fastening hook 316, the fastening hook 316 is used for fastening with a fastening slot provided on the lens, a bayonet is provided on a surface of one of the rib plates 313 facing away from the first bracket 310, the pulling piece 315 is connected with a torsion spring and can elastically reset to drive the fastening hook 316 into or out of the bayonet so as to realize fastening or unlocking of the fastening hook 316 with the fastening slot, therefore, in the fastening state, the lens is fastened and fixed with the first bracket 310, the first bracket 310 can stably drive the lens to displace, and only in the unlocking state, each protrusion of the lens can be rotated to face the plurality of openings 314 and be further pulled away from the first bracket 310.

Referring to fig. 2 to 4 in combination, as a further improvement, the first lens adjusting mechanism 300 further includes a ring-shaped elastic piece 340, the ring-shaped elastic piece 340 may be made of a copper sheet, the ring-shaped elastic piece 340 is arranged on a surface of the first bracket 310 facing the second bracket 320, the ring-shaped elastic piece 340 includes a planar ring-shaped body and a plurality of elastic arms 341 uniformly distributed inside the ring-shaped body, each elastic arm 341 includes a connecting arm 341A connected to the ring-shaped body inside and an extending arm 341B extending circumferentially by the connecting arm 341A, the extending arm 341B has an arch portion 341C elastically abutting against the protrusion, each extending arm 341B is disposed opposite each rib 313, specifically, each extending arm 341B is disposed in one-to-one correspondence with each rib 313, both extend in a circumferential direction of the first communication hole 311, and the extending arm 341B faces the corresponding rib 313. In addition, two or more extension arms 341B may be provided to face each other with respect to the same rib 313. The extension arm 341B has at least one arch portion 341C, and the arch portion 341C is provided between the rib 313 of the first bracket 310 and the corresponding projection of the lens and elastically abuts against the projection. In this way, deformation of the contact surface caused by excessive friction force due to direct surface contact between the plurality of protrusions and the plurality of ribs 313 during the lens fixing and mounting process can be avoided. In addition, the ring spring 340 also functions as a sealing piece to seal the gap between the rib 313 and the boss.

In order to well fix the annular spring 340, in this embodiment, the connecting arm 341A and the surface of the first support 310 facing the second component are respectively provided with a clip Kong Heka post that is clamped with each other, and by adopting a manner that the clip Kong Heka posts are matched with each other, the detachable assembly can be realized, the operation is convenient and quick, in addition, in other embodiments, the annular spring 340 can be fixed on the first support 310 by using an adhesive material such as glue, but the assembly and the replacement of the annular spring 340 are relatively difficult.

Further, with reference to fig. 1 and 2, since the lens is generally a cylindrical integral frame, the first bracket 310 is formed as a hollow substantially circular ring plate member to facilitate the adaptation of the lens to the first bracket 310. In the embodiment in which the first support holes 312 are provided in the torus, it is preferable that three protrusions are protruded on the outer circumference of the torus at equal angles with respect to the center of the first support 310, one first support hole 312 is opened in each protrusion, and one second support hole 322 is provided on the second support 320 corresponding to the position of each first support hole 312, for example, in this embodiment, the second support 320 may be formed as a hollow substantially rectangular plate, and each second support hole 322 is provided in the substantially rectangular plate. In the case that the first bracket holes 312 and the second bracket holes 322 are three, which may be also referred to as three pairs of bracket holes, when the first screw connectors 331 corresponding to the three pairs of bracket holes are simultaneously rotated and adjusted and the rotation numbers are approximately the same, the first bracket 310 moves substantially parallel to the axial direction of each first screw connector 331 with respect to the second bracket 320, and when the rotation numbers of the first screw connectors 331 corresponding to the three pairs of bracket holes are different or only the first screw connectors 331 corresponding to the portions of the three pairs of bracket holes are adjusted, the lens can be moved and rotated to be changed, thereby realizing multi-azimuth adjustment of the lens. In addition, it should be understood that the first rack holes 312 and the second rack holes 322 may be provided in other numbers according to actual needs.

Lens adjusting module embodiment

As another objective of the present invention, a detailed description will be given below of an embodiment of a lens adjustment module according to the present invention, and referring to fig. 6 to 10 specifically, a lens adjustment module 1000 according to an embodiment of the present invention includes a base mechanism 100, a second lens adjustment mechanism 200 and a first lens adjustment mechanism 300 in any of the above first lens adjustment mechanism embodiments, which are sequentially stacked and connected from the near side to the far side along a vertical direction perpendicular to a plane of a main body of the base mechanism 100, and the first lens adjustment mechanism 300 is specifically referred to above and will not be repeated. The lens adjustment module 1000 further includes a first electric driving mechanism 400 and a second electric driving mechanism 500, where the first electric driving mechanism 400 is in transmission connection with the first lens adjustment mechanism 300 and drives the first lens adjustment mechanism 300 to directly drive the lens to move along the first direction, specifically, the first electric driving mechanism 400 may be in transmission connection with the first bracket 310 or the second bracket 320 of the first lens adjustment mechanism 300, in this embodiment, the first electric driving mechanism 400 is in transmission connection with the second bracket 320, and drives the lens to move along the first direction through the first bracket 310 that is in adjustable and movable connection with the second bracket 320. The second electric driving mechanism 500 is in driving connection with the second lens adjusting mechanism 200 and drives the second lens adjusting mechanism 200 to move the second bracket 320 along a second direction perpendicular to the first direction, so that the first bracket 310 drives the lens to move along the second direction, and for convenience of understanding, the first direction includes horizontal X-and x+ directions, and the second direction includes vertical Y-and y+ directions, as indicated by arrows of coordinate axes in fig. 6. The base mechanism 100 includes a base main body 110, the second lens adjustment mechanism 200 includes a third bracket 210, the third bracket 210 and the base main body 110 include a third communication hole 216 and a fourth communication hole 113, respectively, and the third communication hole 216, the fourth communication hole 113, and the first communication hole 311 and the second communication hole 321 of the first lens adjustment mechanism 300 are substantially concentric and each for passing a lens. As will be further appreciated from the above description of the stacked arrangement, the third bracket 210 is movably coupled to the base body 110 in a relatively movable manner, and the second bracket is movably coupled to the third bracket 210 in a relatively movable manner. Therefore, the first electric driving mechanism drives the second bracket to move along the first direction relative to the base main body 110 so as to directly realize the position adjustment of the lens fixed on the first bracket 310, and the second electric driving mechanism drives the third bracket 210 to move along the second direction relative to the base mechanism 100 and drives the second bracket 320 to move along with the second direction, so that the position adjustment of the lens fixed on the first bracket 310 is indirectly realized, and the position adjustment of the lens relative to the base main body 110 in the first direction and the second direction is realized. Therefore, the lens adjusting module 1000 of the present embodiment has compact structure and small occupied space, and the electric driving structure is adopted to ensure high accuracy of adjusting the lens position. In addition, since the first bracket 310 and the second bracket 320 are movably connected and the first bracket 310 is fixedly connected with the lens, the relative position between the first bracket 310 and the second bracket 320 can be adjusted by, for example, manually adjusting the relative position, so that the user can select one or both of the electric driving mode and the relative position adjusting mode to adjust the lens position according to the actual needs, for example, the electric driving mode can be selected to quickly adjust the lens position, and the relative position adjusting mode can be selected to more slightly adjust the lens position. Therefore, the lens adjustment module 1000 of the present embodiment can meet different requirements of lens position adjustment, and is flexible to use.

Referring to fig. 6, as a specific implementation of the lens adjustment module of the present embodiment, two sets of first supporting portions disposed along the second direction are disposed on the base main body 110, the second lens adjustment mechanism 200 includes a first slide bar 220 supported by the first supporting portions and inserted into the third bracket 210, and two sets of second supporting portions disposed along the first direction on the three brackets, and the first lens adjustment mechanism 300 is supported by the second supporting portions and inserted into the second slide bar 350 of the second bracket 320, and it should be noted that, in other embodiments, the second slide bar 350 may be disposed to be inserted into the first bracket 310 according to actual needs. The third and second holders 210 and 320 are moved under the guide of the first and second slide bars 220 and 350, respectively. By the sliding fit of the first sliding rod 220 and the third bracket 210, and the second sliding rod 350 and the second bracket 320, the friction force of the relative motion is reduced, so that the movement of the third bracket 210 and the second bracket 320 is stable and reliable, and the positions of the lens in the first direction and the second direction can be accurately adjusted.

The first support portion and the second support portion may be, for example, hole sleeves (not shown) with adjustable hole diameters of central holes and fixed on the base main body and the third support, preferably, the hole sleeves are integrally formed with the base main body and the third support, and each hole sleeve has two arms with internal threads and a spacing opening between the two arms in a radial direction of the central holes. The first support portion and the second support portion may include, for example, a clip and a notch groove (not shown) that are engaged with each other, specifically, notch grooves each having an arc surface are provided on the base body and the third bracket, and a part of the circumferential surfaces of both ends of the first slide bar and the second slide bar are engaged with the corresponding arc surfaces of the notch grooves. In order to obtain the technical effect of relatively simple structure and high assembly efficiency, in the present embodiment, referring to fig. 2, 4 to 6 and 9 in particular, the first lens adjusting mechanism 300 and the second lens adjusting mechanism 200 each include a plurality of screw fixing members SF, and the two sets of first supporting portions and the two sets of second supporting portions are respectively two pairs of first bosses 120 and two pairs of second bosses 230, and the first bosses 120 and the second bosses 230 have inverted trapezoidal surfaces or arc surfaces, in the present embodiment, inverted trapezoidal surfaces are adopted. The first slide bar 220 and the second slide bar 350 are each generally cylindrical bars comprising two free ends and a cylinder between the two free ends having a D-shaped cross section, wherein the D-shaped cross section of the first slide bar 220 is formed by a notch 221 provided at the free end, i.e. the free end of the first slide bar 220 comprises an arc surface 222 and a crimp surface 223 formed by the notch 221 corresponding to the D-shaped cross section, and the arc surface 222 are each preferably an arc surface 222. A through hole 224 is provided between the arc surface 222 and the press-contact surface 223, the arc surface 222 abuts against the inverted trapezoidal surface of the first boss 120, each screw fixing member SF such as a screw is connected to the screw fixing hole 121 such as an internal screw hole on the first boss 120 through the arc surface 222 via the communication hole, respectively, the screw head of each screw abuts against the press-contact surface 223, thereby ensuring that the first slide bar 220 is reliably supported and fixed by the first support portion, and the structure of the free end of the second slide bar 350 having the D-shaped cross section and the corresponding mating structure of the second boss 230 can be referred to above, and therefore, the second slide bar 350 is reliably supported and fixed by the second support portion.

Further, as an alternative embodiment of the first electric driving mechanism 400 and the second electric driving mechanism 500, referring to fig. 6 and 9, in this embodiment, the first electric driving mechanism 400 includes a first motor 410 and a first screw 420 that are in driving connection, for example, by using a coupling, the second electric driving mechanism 500 includes a second motor 510 and a second screw 520 that are in driving connection, for example, by using a coupling, and the first screw 420 and the second screw 520 are in driving connection with the second bracket 320 and the third bracket 210, respectively, and it is known that the driving connection is in a screw driving connection, that is, the screw portions of the first screw 420 and the second screw 520 are engaged with the screw portions of the second bracket 320 and the third bracket 210, and it should be noted that the screw portions may be directly formed on the self-bodies of the second bracket 320 and the third bracket 210, or may be provided on driving members fixed on the second bracket 320 and the third bracket 210, respectively. The first screw 420 and the second screw 520 are rotated by the first motor 410 and the second motor 510, respectively, and the second bracket 320 and the third bracket 210 are moved in the axial direction of each corresponding screw by the screw driving connection. The first motor 410 and the second motor 510 are fixedly connected with the third bracket 210 and the base body 110 through the L-shaped first fixing piece 430 and the second fixing piece 440, respectively, specifically, the L-shaped first fixing piece 430 and the L-shaped second fixing piece 530 each include two first sub-fixing pieces (not shown) and two second sub-fixing pieces 531 disposed at substantially right angles, the two first sub-fixing pieces are fixedly connected with the third bracket 210 and the first motor 410 through threaded connections, the two second sub-fixing pieces 531 are fixedly connected with the base body 110 and the second motor 510 through threaded connections, respectively, more specifically, the two first sub-fixing pieces are correspondingly provided with paired threaded connection holes with the third bracket 210 and the first motor 410, the two second sub-fixing pieces 531 are correspondingly provided with paired threaded connection holes with the base body 110 and the second motor 510, respectively, and the paired threaded connection holes are respectively screwed with the threaded fixing pieces SF such as screws. As described above, the first and second motors 410 and 510 are fixed by the first and second fixing pieces 430 and 530, which are both L-shaped, such that the first and second motors 410 and 510 are indirectly connected with respect to the third bracket 210 and the base body 110, respectively, without direct contact, and unavoidable vibration generated when the first and second motors 410 and 510 are operated can be greatly buffered, thereby avoiding occurrence of an unexpected position change of the lens due to a large vibration or even a displacement of the third bracket 210 and the base body 110 due to the influence of the vibration. In addition, since the driving connection of each motor and the corresponding screw is generally rigid connection, by providing the L-shaped first fixing piece 430 and second fixing piece 530, a certain relative movement space can be provided for each corresponding motor and screw, so that damage caused by excessive torque generated by excessive interaction between each motor and screw is avoided, and reliability of the lens adjusting module is improved.

Referring to fig. 7 in combination, in order to firmly fix the second screw 520, as a further improvement, the base mechanism 100 further includes a pair of rod fixing members for fixing both ends of the second screw 520, each of the rod fixing members including a support 130 provided on the base body 110 and a cover plate 132 fixedly coupled to the support 130, the support 130 having a slot (not shown) for receiving the shaft sleeve 131, opposite ends of the second screw 520 being respectively inserted into the shaft sleeve 131, and a pair of screw holes being correspondingly provided on the cover plate 132 and the support 130 through screw coupling, thereby fixedly coupling the cover plate 132 with the support 130, and the cover plate 132 fixing the shaft sleeve 131 in the slot.

Referring to fig. 6 to 9 in combination, the third bracket 210 of the lens adjustment module 1000 further includes a first protrusion 211, the first protrusion 211 includes a first through groove 212 through which the second screw 520 passes, which sequentially extends from the first side of the third bracket 210 away from the third communication hole 216 and in a direction parallel to the first direction, and preferably, a boss for fixedly coupling with the first sub-fixing piece may be further provided at a free end of the first protrusion 211, the boss being provided with the pair of screw coupling holes corresponding to one of the first sub-fixing pieces. A first transmission block 240 in threaded connection with the second screw 520 is fixed in the first through groove 212, for example, the first transmission block and the first protruding portion are correspondingly provided with threaded holes, and each threaded hole is connected by a screw or other threaded member to fix the first transmission block in the first through groove, so as to ensure reliable transmission. The first driving block 240 may be a cylindrical body with an internally threaded hole, for example, the first driving block 240 is a movable nut. The threaded connection of the first transmission block 240 and the second screw 520 may be understood as a fit of the internal thread and the external thread, and during the rotation of the second screw 520, the internal thread of the first transmission block 240 may be moved in the second direction by the force of the external thread of the second screw 520, so that one of a pair of first groove surfaces of the first transmission block 240 opposite to the first through groove 212 in the first direction may abut against and drive the first protrusion 211 to move by applying a force to one of the first groove surfaces, and it is known that the first transmission block 240 functions as the above-mentioned transmission member. By providing the first transmission block 240 on the third bracket 210, the first transmission block 240 is in surface contact with the first groove surface, so that the first transmission block 240 applies a uniform force to the first groove surface, the third bracket 210 moves smoothly, and the movement distance of the first transmission block 240 and thus the third bracket 210 can be precisely controlled by controlling the rotation angle of the second screw 520.

Referring to fig. 8 to 10, further, in this embodiment, as a specific embodiment of inserting the first slide bar 220 and the second slide bar 350 into the third bracket 210 and the second bracket 320 respectively, the first protrusion 211 further includes a through hole 213 between the third communication hole 216 and the first through slot 212 through which the first slide bar 220 passes, a pair of first sliding sleeves 250 having a first guide hole are provided on a second side surface opposite to the first side surface of the third bracket 210, the first sliding sleeves 250 are sleeved on the outer periphery of the first slide bar 220, a pair of opposite third side surfaces of the second bracket 320 are respectively provided with sliding cylinders 323 through which the second slide bar 350 passes, a second sliding sleeve 324 is provided inside each of two ends of the sliding cylinders 323, and the second sliding sleeves 324 are sleeved on the second slide bar 350, and it can be known that the through holes 213 similarly function as the first sliding sleeves 250, so that the third bracket 210 can move in parallel to the second direction under the guide of the first sliding sleeves 210 and the second side surfaces respectively, and can move in parallel to the second direction through the first sliding sleeves 250 and the second sliding sleeves 320, and can be guaranteed to move in a good degree or smooth and smooth direction relative to the sliding sleeves 320 through the first sliding sleeves and the second sliding sleeves 350. In addition, in other embodiments, in order to further reduce the friction resistance, an oil-free bushing may be disposed in each of the first sliding sleeve 250, the through hole 213, and the second sliding sleeve 324. Preferably, the first sliding sleeve 250 and the second sliding sleeve 324 are integrally formed with the third bracket 210 and the second bracket 320, respectively, so that the structure can be simplified and the cost can be reduced. In addition, by providing the first protrusion 211 having the through hole 213 and the first through groove 212, not only is the first slide bar 220 and the second screw 520 respectively guided and driven to the third bracket 210 realized, but also the axes of the first slide bar 220 and the second screw 520 are ensured to have high parallelism, so that the movement of the third bracket 210 is smooth and accurate, and the compactness of the overall structure of the lens adjusting module 1000 is facilitated. Further, in an alternative embodiment in which the first bracket 310 is a hollow substantially circular ring body plate and the second bracket 320 is a hollow substantially rectangular body plate, three protrusions are protruded on the outer circumference of the substantially circular ring body plate at equal angles with the center line of the first communication hole 311 as the center, one first bracket hole 312 is formed in each protrusion, and three second bracket holes 322 corresponding to the respective first bracket holes 312 are formed in the substantially rectangular body plate, specifically, referring to fig. 10, two second bracket holes 322 are formed in the body of the substantially rectangular body plate, and the other second bracket hole 322 is formed in the protrusion 328 of the slide 323, so that the second bracket 320 is simplified and compact in structure.

Referring to fig. 6 and 10 in combination, as an alternative embodiment, the second bracket 320 further includes a pair of opposite fourth sides, one of which is provided with a pair of protruding arms 325 having a gap, at least one first opening is provided on each protruding arm 325, the first lens adjusting mechanism 300 further includes a connection plate 326 and a connection fixing member, the connection plate 326 has a pair of support plates 326A, at least one second opening corresponding to the first opening is provided on each support plate 326A, a screw sleeve 326B fixed between the pair of support plates 326A and engaged with the first screw 420 is located in the gap, and threads are provided on an inner circumference of the screw sleeve 326B. The connecting fixing piece is used for connecting the corresponding first opening and second opening, preferably, the first opening and the second opening are threaded holes respectively, and the connecting fixing piece is preferably a screw. In this way, by arranging the screw sleeve 326B on the second bracket 320, the screw sleeve 326B is driven by the first screw 420 to move and drive the second bracket 320 to move, in addition, by controlling the rotation angle of the first screw 420, the moving distance of the screw sleeve 326B can be accurately controlled, and the second bracket 320 is driven to accurately move by the screw sleeve 326B.

Referring to fig. 6 to 8 in combination, in order to more precisely control the movement of the third and second holders 210 and 320, it is preferable that the third and second holders 210 and 320 are provided with first and second openings 215 and 360, respectively, and the base body 110 and the third holder 210 are provided with second and second openings 112 and 260, respectively, such as, specifically, the second opening 112 is provided on the first protrusion 111 of one side of the base body 110, and it is known that the first opening 215 is provided on the second protrusion 214 of one first sliding sleeve 250, and the positions of the respective openings and the photoelectric sensors may be correspondingly interchanged. The first opening 215 extends along the first direction, the second opening 112 extends along the second direction, preferably, the extending distance of the first opening 215 in the first direction is set to be equal to the preset moving distance of the second bracket 320 in the first direction, the extending distance of the second opening 112 in the second direction is set to be equal to the preset moving distance of the third bracket 210 in the second direction, each photoelectric sensor comprises a light emitting part and a light receiving part, each opening allows the detection light emitted by the light emitting part matched with the photoelectric sensor to pass through and be received by the light receiving part, specifically, the lens adjusting module comprises a controller or a projection device assembled with the lens adjusting module comprises a controller, each photoelectric sensor and each electric driving mechanism are respectively and electrically connected with the controller, when the third bracket 210 or/and the second bracket 320 move and during the moving process, the light emitting part of the corresponding photoelectric sensor emits the detection light, if the light receiving portion corresponding to the corresponding photo sensor can receive the detection light, the controller determines that the corresponding bracket is located within the preset moving distance, the controller allows the motor of the corresponding electric driving mechanism to work, so as to drive the third bracket 210 or/and the second bracket 320 to move, and if the light receiving portion corresponding to the corresponding photo sensor can not receive the detection light, the controller determines that the corresponding bracket is located outside the preset moving distance, the controller controls the corresponding motor to stop working, so as to ensure that the initial position or the moved position of the third bracket 210 and the second bracket 320 does not exceed the preset moving distance, thereby being beneficial to reliably and accurately adjusting the position of the lens, and in addition, preferably, if a certain bracket is located outside the preset moving distance unexpectedly, the controller controls the corresponding motor to drive the certain bracket to move within the preset moving distance, such as one half of its preset travel distance to maintain proper operation of the particular bracket.

Referring to fig. 3, 4 and 6, in order to achieve good separable fixing of the first bracket 310 and the lens, preferably, a plurality of ribs 313 are provided on the first bracket 310 at equal intervals along the circumference of the first communication hole 311, holes 314 are provided between every two adjacent ribs 313, each hole 314 is provided between every two adjacent ribs 313 at equal intervals along the circumference, the plurality of holes 314 are provided for corresponding protrusions provided on the outer circumference of the frame of the lens to pass through and rotate at a certain angle, so that the plurality of ribs 313 and the plurality of protrusions are at least partially overlapped and clamped with each other, thereby preventing the lens from being separated from the first bracket 310 through interference fit of the ribs 313 and the protrusions from being separated from the first bracket 310, and when the lens needs to be separated from the first bracket 310, the plurality of protrusions can be rotated in opposite directions so that the protrusions are completely staggered with the plurality of ribs 313 and are opposite to the plurality of holes 314, and it is known that the rotation of the protrusions of the lens can be achieved through the whole frame of the lens by manually rotating the lens. Therefore, when the first bracket 310 moves in the first direction, the first bracket 310 applies a force to each protrusion through each rib 313 to drive the lens to move in the first direction, and when the third bracket 210 moves in the second direction, the third bracket 210 drives the second bracket 320 to move through the first sliding rod 220 during the movement, and the first bracket 310 movably connected with the second bracket 320 moves synchronously with the second bracket 320, and at the same time, the first bracket 310 applies a force to each protrusion through each rib 313 to drive the lens to move in the second direction.

Projection device embodiments

As still another object of the present invention, the projection apparatus provided by the present invention includes a lens, a lens connecting frame 600, a light machine, and a lens adjusting module in any of the foregoing embodiments of the lens adjusting module, wherein the lens is fixedly connected with the first bracket 310, the lens connecting frame 600 is respectively connected with the base main body 110 and the light machine, and a light transmitting portion 620 for transmitting and injecting a light beam emitted from the light machine into the lens is disposed on a frame plate 610 of the lens connecting frame 600 far from the base main body, and generally, the light transmitting portion 620 includes a light transmitting lens, and the light transmitting lens is sealingly fixed on the frame plate 610. It should be noted that, the lens connecting frame 600 may be an independent component for connecting the base body 110 and the optical engine, or may be a component included in the optical engine, for example, the lens connecting frame 600 and the optical engine are integrally configured. The light beam generated by the light source, the optical lens group and other components in the projection device through the light transmission part 620 is injected into the lens, and the position of the lens is adjusted through the lens adjusting module, so that the lens is positioned at the optimal position for receiving the light beam injected by the light transmission part 620, and the projected image projected by the lens is ensured to reach good quality.

The foregoing is a further detailed description of the invention in connection with specific embodiments, and it is not intended that the invention be limited to such description. It will be apparent to those skilled in the art that several simple deductions or substitutions can be made without departing from the spirit of the invention. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

In the present invention, the first lens adjusting mechanism is not limited to be applied to the lens adjusting module, but may be applied to various occasions where it alone acts to adjust the position of the lens, unless explicitly specified and defined otherwise. The term "substantially" is intended to be an overview of the description of the shape, angle, position, number, etc., and is not intended to be limiting precisely. The terms "coupled," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally formed, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The term "adjustment" is used to emphasize a change in lens position, and the term "adjustment" is used to emphasize a technical measure employed for a change in lens position, but the two should not be split or distinguished from each other, but should be combined with each other to understand the inventive concept of the present invention. The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a technical feature defining "first", "second", etc. may include one or more such feature, either explicitly or implicitly. In addition, the "first direction" and the "second direction" described and shown in the drawings are respectively illustrated as horizontal and vertical directions, but the first direction and the second direction may be other directions according to the actual working condition of the lens adjustment module. Therefore, it will be understood by those skilled in the art that the specific meaning of the above terms in the present invention may be understood according to the specific circumstances.

The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures made by the present invention and the accompanying drawings or directly or indirectly applied to other related technical fields, such as the positional adjustment of the camera lens, the positional adjustment of the microscope lens, etc., are considered to be included in the scope of the present invention.

Claims

1. The first lens adjustment mechanism is characterized by comprising:

the adjustable movable connection device comprises a first bracket and a second bracket, wherein the first bracket is a hollow approximate ring body plate, the first bracket and the second bracket are respectively provided with a first communication hole and a second communication hole for a light beam or a lens to pass through, and one of the first bracket and the second bracket is fixedly connected with the lens;

the adjustable connecting components comprise first threaded connecting pieces and elastic pieces, a plurality of first frame holes which all comprise through holes are formed in the first support, a plurality of second frame holes which correspond to the first frame holes one by one and are provided with first threaded holes are formed in the second support, the first threaded connecting pieces, the first frame holes and the second frame holes are arranged in a one-to-one correspondence mode, the first threaded connecting pieces comprise threaded rods and connectors, first external threads which are used for being connected with the first threaded holes are formed in the free ends of the threaded rods, the first threaded connecting pieces penetrate through the first frame holes, the elastic pieces are arranged between the first support and the second support in a compressed mode, and the first threaded connecting pieces and the elastic pieces act together to adjust the relative distance between the first support and the second support;

The positioning block and the connector are both cylinders with concave parts, the first frame hole comprises the through hole and a second threaded hole which is opposite to the second bracket and communicated with the through hole, and a third external thread connected with the second threaded hole is arranged on the periphery of the positioning block; and

the gasket is clamped between the positioning block and the connector, a bulge is arranged on the periphery of the gasket, a non-through groove extending from the free end along the direction away from the free end is formed in the first frame hole, the bulge is inserted into the groove, and the positioning block applies pressure to the gasket so that the gasket and the connector are mutually propped.

2. The first lens adjustment mechanism of claim 1, wherein:

the first frame hole is a first stepped hole comprising the via hole, a first counter bore facing the second support and a first stepped surface positioned between the via hole and the first counter bore, the second frame hole is a second stepped hole comprising the first threaded hole, a second counter bore facing the first support and a second stepped surface positioned between the first threaded hole and the second counter bore, and the first threaded connecting piece is positioned between the first stepped surface and the second stepped surface, and the periphery of the threaded rod is sleeved with the elastic piece.

3. The first lens adjustment mechanism of claim 1, wherein:

the first bracket and the second bracket are provided with a first surface and a second surface which face each other, the elastic piece is arranged between the first surface and the second surface in a compressed mode, at least one of the first surface and the second surface is provided with a convex column, and at least one free end of the elastic piece is sleeved on the periphery of the convex column.

4. The first lens adjustment mechanism of claim 1, wherein:

the adjustable connecting assembly further comprises a cylindrical hollow hole sleeve with the first threaded hole and the second external threads, the second internal threads are arranged on the inner wall of the second frame hole, the second external threads are in threaded connection with the second internal threads, and the first external threads are in threaded connection with the first threaded hole.

5. The first lens adjustment mechanism of claim 1, wherein:

a plurality of rib plates are arranged on the first support at equal intervals along the circumferential direction of the first communication hole, holes are formed between every two adjacent rib plates, a plurality of holes are used for enabling a plurality of corresponding protrusions of the lens to pass through and rotate for a certain angle, and therefore the rib plates are clamped with the protrusions.

6. The first lens adjustment mechanism of claim 5, wherein:

the first lens adjusting mechanism further comprises an annular elastic piece, the annular elastic piece is arranged on the surface of the first support facing the second support, the annular elastic piece comprises a planar annular main body and a plurality of elastic arms which are uniformly distributed on the inner side of the annular main body, each elastic arm comprises a connecting arm connected with the inner side of the annular main body and an extension arm extending from the connecting arm along the circumferential direction, each extension arm is provided with an arch part in elastic abutting connection with the protrusion, and each extension arm and each rib plate are respectively arranged oppositely.

7. The first lens adjustment mechanism of claim 1, wherein:

the first frame holes are formed in three and are arranged in the annular body at equal angles relative to the center of the first bracket, and the second bracket is provided with three second frame holes corresponding to the three first frame holes.

8. The lens adjustment module, its characterized in that includes:

a base mechanism, a second lens adjustment mechanism, and a first lens adjustment mechanism according to any one of claims 1 to 7, which are provided in a stacked connection in this order;

the first electric driving mechanism is in transmission connection with the first lens adjusting mechanism and drives the first lens adjusting mechanism so that the first lens adjusting mechanism directly drives the lens to move along a first direction;

The second electric driving mechanism is in transmission connection with the second lens adjusting mechanism and drives the second lens adjusting mechanism to indirectly drive the lens to move along a second direction perpendicular to the first direction by means of the first lens adjusting mechanism;

the base mechanism comprises a base main body, the second lens adjusting mechanism comprises a third support, the third support and the base main body respectively comprise a third communication hole and a fourth communication hole, and the first communication hole of the first support, the second communication hole of the second support, the third communication hole and the fourth communication hole are approximately concentric and are all used for the lens to pass through.

9. The lens adjustment module of claim 8, wherein:

the base body is provided with two groups of first supporting parts arranged along the second direction, the second lens adjusting mechanism comprises first sliding rods supported by the first supporting parts and inserted into the third support and two groups of second supporting parts arranged along the first direction on the third support, the first lens adjusting mechanism comprises second sliding rods supported by the second supporting parts and inserted into the second support, and the third support and the second support move under the guidance of the first sliding rods and the second sliding rods respectively.

10. The lens adjustment module of claim 9, wherein:

the first lens adjusting mechanism and the second lens adjusting mechanism comprise a plurality of threaded fixing pieces, the two groups of first supporting portions and the two groups of second supporting portions are respectively two pairs of first bosses and two pairs of second bosses, the first bosses and the second bosses are provided with inverted trapezoid surfaces or arc surfaces, the first sliding rod and the second sliding rod comprise main body parts and free ends, the main body parts are cylindrical rods, the free ends are provided with notches, the cross sections of the free ends are D-shaped, each free end comprises an arc surface and a compression joint surface formed by the notches, through holes are formed between the arc surfaces and the compression joint surfaces, the arc surfaces are abutted against the first bosses and the second bosses, and each threaded fixing piece penetrates through the arc surfaces through the through holes to be connected with the threaded fixing holes on the first bosses and the second bosses and is abutted against the compression joint surfaces.

11. The lens adjustment module of claim 9, wherein:

the first electric driving mechanism comprises a first motor and a first screw rod which are in transmission connection, the second electric driving mechanism comprises a second motor and a second screw rod which are in transmission connection, the first screw rod and the second screw rod are respectively in transmission connection with the second bracket and the third bracket, and the first motor and the second motor are respectively and fixedly connected with the third bracket and the base main body through a first fixing piece and a second fixing piece which are approximately L-shaped.

12. The lens adjustment module of claim 11, wherein:

the base mechanism further comprises a pair of rod fixing assemblies used for fixing two ends of the second screw rod, each rod fixing assembly comprises a support and a cover plate, the support is arranged on the base body and fixedly connected with the support, the support is provided with a groove for accommodating the shaft sleeve, the cover plates fix the shaft sleeve in the groove, and two opposite ends of the second screw rod are respectively inserted into the shaft sleeve.

13. The lens adjustment module of claim 11, wherein:

the third bracket comprises a first protruding portion, the first protruding portion comprises a first through groove which is formed by the first side surface of the third bracket, is far away from the third communication hole and extends along the direction parallel to the first direction and is used for the second screw rod to pass through, a first transmission block which is in threaded connection with the second screw rod is fixed in the first through groove, and the first transmission block is abutted against one of a pair of first groove surfaces, opposite to the first through groove in the second direction, under the driving of the second screw rod, so that the first protruding portion is driven to move by applying force to one of the first groove surfaces.

14. The lens adjustment module of claim 13, wherein:

the first protruding portion further comprises a through hole which is positioned between the third communication hole and the first through groove and used for the first sliding rod to pass through, a pair of first sliding sleeves with first guide holes are arranged on the second side face, opposite to the first side face, of the third support, the first sliding sleeves are sleeved on the periphery of the first sliding rod, sliding barrels which are used for the second sliding rod to pass through are respectively arranged on the pair of opposite third side faces of the second support, a second sliding sleeve is respectively arranged in the two ends of each sliding barrel, and the second sliding sleeves are sleeved on the second sliding rods.

15. The lens adjustment module of claim 11, wherein:

the second bracket further comprises a pair of opposite fourth side surfaces, wherein a pair of protruding arms with gaps are arranged on one fourth side surface, at least one first opening is arranged on each protruding arm, the first lens adjusting mechanism further comprises a connecting plate and a connecting fixing piece, the connecting plate is provided with a pair of support plates, at least one second opening corresponding to the first opening is arranged on each support plate, a threaded sleeve matched with the first screw rod and arranged between the pair of support plates is located in the gap, and the connecting fixing piece is used for connecting the corresponding first opening and second opening.

16. The lens adjustment module of claim 8, wherein:

the first opening and the second photoelectric sensor are respectively arranged on the third support and the second support, the second opening and the second photoelectric sensor are respectively arranged on the base main body and the third support, the first opening extends along the first direction, the second opening extends along the second direction, each photoelectric sensor comprises a light emitting part and a light receiving part, and the openings allow detection light emitted by the matched light emitting part to pass through and be received by the light receiving part.

17. Projection equipment, including, camera lens link and ray apparatus, its characterized in that:

the projection device further comprises a lens adjusting module according to any one of claims 9 to 16, wherein the lens is fixedly connected with the first bracket, the lens connecting frame is respectively connected with the base main body and the optical machine, and a light transmitting part for transmitting and injecting the light beam emitted by the optical machine into the lens is arranged on the lens connecting frame.