CN216313207U - Back focus adjusting part and camera - Google Patents

Abstract

The utility model provides a back focus adjusting assembly and a camera. Burnt regulating assembly includes the casing after, and the casing has and holds the chamber, and the lateral wall of casing has and holds the installation opening that the chamber communicates, and burnt regulating assembly still including being located the inside that holds the chamber respectively after and: a drive structure; the driving structure is in driving connection with the lifting structure so that at least one part of the lifting structure can move in the direction far away from or close to the mounting opening, and the driving structure is close to the mounting opening relative to the lifting structure; the dustproof structure is fixedly connected with the lifting structure so as to enable the dustproof structure to move along with the lifting structure; the dustproof sheet is arranged on the dustproof structure, and the dustproof structure is in driving connection with the dustproof sheet; the sensor mainboard, the sensor mainboard sets up the one side of keeping away from dustproof construction at the lifting structure. The utility model solves the problem that the camera in the prior art is easy to fall ash when a lens is installed.

Description

Back focus adjusting part and camera

Technical Field

The utility model relates to the technical field of camera equipment, in particular to a back focus adjusting assembly and a camera.

Background

When the camera is matched with the lens, the camera and the lens directly need to have a proper back focus distance to enable the image to be clear, so that the camera needs to adjust the back focus to match the selected lens, and the image is clear. The camera lens and the camera are screwed and fixed through threads, and when the camera lens is installed, foreign matters such as dust and debris can be generated and fall onto an imaging surface, so that a black spot phenomenon is presented on an image, and the imaging effect is influenced.

Therefore, the camera in the prior art is easy to fall ash when the lens is installed.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a back focus adjusting assembly and a camera, so as to solve the problem that dust is easy to fall off when a lens is installed in the camera in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a back focus adjustment assembly including a housing having a receiving chamber, an outer sidewall of the housing having a mounting opening communicating with the receiving chamber, and the back focus adjustment assembly further including: a drive structure; the driving structure is in driving connection with the lifting structure so that at least one part of the lifting structure can move in the direction far away from or close to the mounting opening, and the driving structure is close to the mounting opening relative to the lifting structure; the dustproof structure is fixedly connected with the lifting structure so as to enable the dustproof structure to move along with the lifting structure; the dustproof sheet is arranged on the dustproof structure, and the dustproof structure is in driving connection with the dustproof sheet so that the dustproof sheet can move relative to the dustproof structure; the sensor mainboard, the sensor mainboard sets up the one side of keeping away from dustproof construction at the lifting structure, and dustproof construction's at least partly is located between lifting structure and the sensor mainboard.

Further, the casing is close to the inside wall of installing opening one side and has limit structure, and limit structure has spacing space, and drive structure includes: the driving motor is fixedly arranged on the inner side wall of the shell; the driving frame is movably arranged in the limiting space, and the driving motor is in driving connection with the driving frame.

Further, limit structure includes a plurality of spacing protruding muscle, and two at least spacing protruding muscle set up about the installing opening symmetry to form spacing space, the drive frame activity sets up between two spacing protruding muscle, so that the drive frame can follow the length direction motion of spacing protruding muscle.

Furthermore, the driving frame is rectangular, and two sides of the driving frame, which are close to the two limiting convex ribs, are parallel to the two limiting convex ribs respectively.

Furthermore, a driving gear is arranged on the driving motor, a tooth-shaped section extending along the length direction of the driving frame is arranged on the side edge of the driving frame close to one side of the driving motor, and the tooth-shaped section is meshed with the driving gear.

Furthermore, the inner side wall of the shell close to one side of the mounting opening is provided with a plurality of mounting grooves, the back focus adjusting assembly further comprises a plurality of balls, the balls are in one-to-one correspondence with the mounting grooves, at least one part of the balls is accommodated in the mounting grooves, and the other part of the balls protrudes out of the mounting grooves and is abutted to the driving frame.

Further, the driving frame has a plurality of extrusion archs towards one side of lifting structure, and the lifting structure corresponds a plurality of extrusion archs and is provided with a plurality of extrusion inclined planes, and different extrusion archs respectively with different extrusion inclined plane butts, when driving frame moved along the length direction of spacing protruding muscle, the extrusion was protruding to move along the length direction on extrusion inclined plane to make the lifting structure along keeping away from or being close to the direction motion of installing the opening.

Furthermore, at least one extrusion protrusion is arranged on each of three sequentially connected sides of the driving frame, accommodating grooves are formed in one group of mutually parallel sides of the three sequentially connected sides, and the extrusion inclined plane can enter or exit the accommodating grooves.

Further, burnt adjusting part still includes a plurality of pieces that reset, and every bight department of lifting structure is provided with at least one piece that resets respectively, the one end that resets and the inside wall butt of casing, the other end and the lifting structure butt of the piece that resets.

Furthermore, back burnt adjusting part still includes a plurality of mountings, and lifting structure's bight department has a plurality of fixed orificess, a plurality of piece that reset, a plurality of fixed orificess and a plurality of mounting one-to-one, and the mounting passes the fixed orificess and is connected with the inside wall of casing, and the piece cover that resets is established on the mounting.

Further, the dustproof construction includes: the body part is provided with an avoiding opening and a sliding groove communicated with the avoiding opening, and the dustproof sheet is movably arranged on the sliding groove; the driving part is arranged on the body part and is in driving connection with the dustproof sheet, so that the dustproof sheet can shield the avoiding opening or return to the inside of the body part.

Further, the casing includes first shell and the second shell of mutual concatenation, and the edge of first shell is provided with a plurality of draw-in grooves, and the edge of second shell is provided with a plurality of with draw-in groove complex joint arm, a plurality of draw-in grooves respectively with a plurality of joint arm one-to-one.

According to another aspect of the present invention, there is also provided a camera including the back focus adjustment assembly described above.

By applying the technical scheme of the utility model, the rear coke adjusting assembly comprises a shell, wherein the shell is provided with a containing cavity, the outer side wall of the shell is provided with a mounting opening communicated with the containing cavity, and the rear coke adjusting assembly also comprises a driving structure, a lifting structure, a dustproof sheet and a sensor mainboard which are respectively positioned in the containing cavity. The driving structure is in driving connection with the lifting structure so that at least one part of the lifting structure can move in the direction far away from or close to the mounting opening, and the driving structure is close to the mounting opening relative to the lifting structure; the dustproof structure is fixedly connected with the lifting structure, so that the dustproof structure can move along with the lifting structure; the dustproof sheet is arranged on the dustproof structure, and the dustproof structure is in driving connection with the dustproof sheet so that the dustproof sheet can move relative to the dustproof structure; the sensor mainboard sets up in the one side that the dustproof construction was kept away from to the lifting structure, and at least a part of dustproof construction is located between lifting structure and the sensor mainboard.

When the rear coke adjusting assembly with the structure is used, the driving structure can drive the lifting structure to move, so that the dust-proof structure is driven to move through the lifting structure. Meanwhile, the sensor main board is arranged on the lifting structure, so that when the lifting structure moves, the sensor main board can move along with the lifting structure, the sensor main board and the lens move back and forth relatively, and an automatic focusing scheme can be realized. Moreover, the dustproof sheet is arranged on the dustproof structure, so that the dustproof sheet can shield the sensor mainboard in the process of the relative movement of the sensor mainboard to the lens, and further, impurities such as dust can be effectively prevented from falling on the sensor mainboard. Therefore, the back focus adjusting assembly effectively solves the problem that the camera is easy to fall ash when the lens is installed in the prior art.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 illustrates a schematic structural view of a back focus adjustment assembly in accordance with one particular embodiment of the present invention;

FIG. 2 shows an exploded view of the back focus adjustment assembly of FIG. 1;

FIG. 3 illustrates a front view of the back focus adjustment assembly of FIG. 1;

FIG. 4 shows a cross-sectional view A-A of FIG. 3;

FIG. 5 is a schematic diagram showing the lifting structure of the back focus adjustment assembly of FIG. 2;

FIG. 6 is a schematic view of another angle of elevation of the back focus adjustment assembly of FIG. 2;

FIG. 7 shows a schematic structural view of a first housing of the back focus adjustment assembly of FIG. 2;

FIG. 8 is a schematic structural view illustrating a dust prevention structure of the back focus adjustment assembly of FIG. 2;

FIG. 9 shows a cross-sectional view A-A of FIG. 8;

FIG. 10 is a schematic diagram showing the internal construction of the back focus adjustment assembly of FIG. 1;

FIG. 11 is a schematic diagram showing the construction of the drive motor of the back focus adjustment assembly of FIG. 2;

FIG. 12 shows a schematic structural view of a second housing of the back focus adjustment assembly of FIG. 2;

fig. 13 shows a schematic view of the driving frame of the back focus adjustment assembly of fig. 2.

Wherein the figures include the following reference numerals:

10. a housing; 11. an installation opening; 12. limiting convex ribs; 13. a first housing; 131. a card slot; 14. a second housing; 141. a clamping arm; 20. a drive structure; 21. a drive motor; 22. a drive frame; 221. extruding the bulge; 222. an accommodating groove; 30. a lifting structure; 31. extruding the inclined plane; 40. a dust-proof structure; 41. a body portion; 42. a drive section; 50. a dust-proof sheet; 60. a sensor main board; 70. a ball bearing; 80. a reset member.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the utility model.

In order to solve the problem that the dust easily falls when the camera lens is installed in the camera in the prior art, the application provides a back focal length adjusting assembly and a camera.

Among them, the camera in the present application has a back focus adjustment assembly described below.

As shown in fig. 1 to 13, the back focus adjusting assembly in the present application includes a housing 10, the housing 10 has a receiving cavity, an outer side wall of the housing 10 has a mounting opening 11 communicating with the receiving cavity, and the back focus adjusting assembly further includes a driving structure 20, a lifting structure 30, a dust-proof structure 40, a dust-proof sheet 50 and a sensor main board 60 respectively located inside the receiving cavity. The driving structure 20 is in driving connection with the lifting structure 30 so that at least a part of the lifting structure 30 can move in a direction away from or close to the mounting opening 11, and the driving structure 20 is close to the mounting opening 11 relative to the lifting structure 30; the dustproof structure 40 is fixedly connected with the lifting structure 30, so that the dustproof structure 40 can move along with the lifting structure 30; the dustproof sheet 50 is arranged on the dustproof structure 40, and the dustproof structure 40 is in driving connection with the dustproof sheet 50, so that the dustproof sheet 50 can move relative to the dustproof structure 40; the sensor main board 60 is disposed on a side of the lifting structure 30 away from the dustproof structure 40, and at least a portion of the dustproof structure 40 is located between the lifting structure 30 and the sensor main board 60.

When the rear coke adjusting assembly with the above structure is used, the driving structure 20 can drive the lifting structure 30 to move, so that the dust-proof structure 40 is driven to move by the lifting structure 30. Meanwhile, as the sensor main board 60 is arranged on the lifting structure 30, when the lifting structure 30 moves, the sensor main board 60 moves along with the lifting structure 30, so that the sensor main board 60 moves back and forth relative to the lens, and an automatic focusing scheme can be realized. Moreover, since the dust-proof sheet 50 is disposed on the dust-proof structure 40, the dust-proof sheet 50 can shield the sensor main board 60 during the movement of the sensor main board 60 relative to the lens, and further can effectively prevent impurities such as dust from falling on the sensor main board 60. Therefore, the back focus adjusting assembly effectively solves the problem that the camera is easy to fall ash when the lens is installed in the prior art.

It should be noted that, in the present application, the dustproof structure 40 and the lifting structure 30 both have an opening corresponding to the sensor main board 60, and the dustproof sheet 50 can cover the opening of the dustproof structure 40 corresponding to the sensor main board 60 under the driving action of the dustproof structure 40. The dust-proof sheet 50 can play a dust-proof role in the sensor main board 60. After focusing is completed, the dustproof sheet 50 can move under the driving action of the dustproof structure 40 and does not cover the opening of the dustproof structure 40 corresponding to the sensor main board 60, so that normal use of the sensor main board 60 can be ensured.

It should also be noted that the back focus adjustment assembly in the present application further includes a filter glass, and the filter glass is also disposed on the dust-proof structure 40. Moreover, the filter glass and the dust-proof sheet 50 are disposed in parallel on two sides of the dust-proof structure 40, and the dust-proof structure 40 can also drive the filter glass to move on the dust-proof structure 40.

Specifically, the inner side wall of the housing 10 on the side close to the mounting opening 11 has a limiting structure, the limiting structure includes a plurality of limiting convex ribs 12, at least two limiting convex ribs 12 are symmetrically arranged about the mounting opening 11 and form a limiting space, and the driving structure 20 includes a driving motor 21 and a driving frame 22. In one embodiment of the present application, the driving motor 21 is fixedly disposed on the inner side wall of the housing 10, the driving frame 22 is movably disposed between the two limiting ribs 12, i.e. in the limiting space formed by the two limiting ribs 12, and the driving motor 21 is drivingly connected to the driving frame 22, so that the driving frame 22 can move along the length direction of the limiting ribs 12. With the arrangement, when the driving motor 21 drives the driving frame 22 to move in the housing 10, the movement direction of the driving frame 22 can be limited by the two limiting ribs 12, so that the focusing effect of the sensor main board 60 can be ensured.

It should be noted that in the present application, the surface of the portion of the driving frame 22 contacting the housing 10 and the lifting structure 30 is a smooth plane to reduce the resistance of the driving frame 22 during movement and improve the assembly accuracy.

Alternatively, the driving frame 22 is rectangular, and two sides of the driving frame 22 close to the two limit ribs 12 are respectively parallel to the two limit ribs 12.

In one embodiment of the present application, the driving motor 21 is provided with a driving gear, and the side of the driving frame 22 near the driving motor 21 has a tooth-shaped section extending along the length direction thereof, and the tooth-shaped section is engaged with the driving gear.

Specifically, the inner side wall of the casing 10 near the mounting opening 11 further has a plurality of mounting grooves, the back focus adjusting assembly further includes a plurality of balls 70, the plurality of balls 70 correspond to the plurality of mounting grooves one to one, at least a portion of the balls 70 is accommodated in the mounting grooves, and another portion of the balls 70 protrudes out of the mounting grooves and abuts against the driving frame 22. Through the arrangement, when the driving motor 21 drives the driving frame 22 to move in the housing 10, the friction force between the driving frame 22 and the housing 10 can be effectively reduced, so that the driving motor 21 is enabled to adjust the driving frame 22 more sensitively, and the focusing effect can be ensured.

Specifically, one side of the driving frame 22 facing the lifting structure 30 is provided with a plurality of pressing protrusions 221, the lifting structure 30 is provided with a plurality of pressing inclined surfaces 31 corresponding to the plurality of pressing protrusions 221, different pressing protrusions 221 are respectively abutted to different pressing inclined surfaces 31, and when the driving frame 22 moves along the length direction of the limiting convex rib 12, the pressing protrusions 221 move along the length direction of the pressing inclined surfaces 31, so that the lifting structure 30 moves in a direction away from or close to the mounting opening 11.

Specifically, at least one extrusion protrusion 221 is disposed on each of three sequentially connected sides of the driving frame 22, and an accommodation groove 222 is disposed on one group of parallel sides of the three sequentially connected sides, so that the extrusion slope 31 can enter or exit the accommodation groove 222. Through such arrangement, when the extrusion protrusion 221 moves along the length direction of the extrusion inclined surface 31, the extrusion inclined surface 31 corresponding to the accommodating groove 222 can enter or exit the accommodating groove 222, so that the structure inside the shell 10 can be ensured to be more compact, and the space occupied by the rear coke adjusting assembly can be reduced.

In one embodiment of the present application, the number of the pressing protrusions 221 is three, and one pressing protrusion 221 is disposed on each of three sequentially connected sides of the driving frame 22.

Specifically, back burnt adjusting part still includes a plurality of reset pieces 80, and every bight department of lifting structure 30 is provided with at least one reset piece 80 respectively, and the one end of reset piece 80 and the inside wall butt of casing 10, the other end and the lifting structure 30 butt of reset piece 80 reset. By this arrangement, when the pressing protrusion 221 presses the pressing inclined surface 31, the lifting structure 30 moves away from the installation opening 11, and when the driving motor 21 drives the driving frame 22 to move in the opposite direction, although the pressing protrusion 221 is kept attached to the pressing inclined surface 31, the pressing protrusion 221 does not press the pressing inclined surface 31, but the lifting structure 30 moves toward the installation opening 11 under the action of the reset member 80, so that the pressing inclined surface 31 can be attached to the pressing protrusion 221. In addition, the reset piece 80 is arranged in the focusing device, so that the sensor main board 60 can be prevented from moving along with the lifting structure 30, and the focusing effect is further ensured.

In an embodiment of the present application, the back focus adjusting assembly further includes a plurality of fixing members, a plurality of fixing holes are formed at the corner of the lifting structure 30, and a plurality of reset members 80, a plurality of fixing holes and a plurality of fixing members are in one-to-one correspondence, the fixing members pass through the fixing holes and are connected with the inner side wall of the housing 10, and the reset members 80 are sleeved on the fixing members.

Specifically, the dust-proof structure 40 includes a body portion 41 and a driving portion 42. The body part 41 is provided with an avoiding opening and a chute communicated with the avoiding opening, and the dustproof sheet 50 is movably arranged on the chute; the driving portion 42 is disposed on the main body portion 41, and the driving portion 42 is drivingly connected to the dust-proof sheet 50 so that the dust-proof sheet 50 can shield or retract the escape opening into the main body portion 41. It should be noted that the escape opening is an opening of the dust-proof structure 40 relative to the sensor main board 60, and in this embodiment, the dust-proof sheet 50 and the filter glass sheet are respectively disposed on two sides of the escape opening. Also, the driving part 42 includes two motors capable of driving the dust-proof sheet 50 and the filter glass sheet, respectively.

In a specific embodiment of the present application, the housing 10 includes a first housing 13 and a second housing 14 that are spliced together, a plurality of clamping slots 131 are disposed at an edge of the first housing 13, a plurality of clamping arms 141 that are matched with the clamping slots 131 are disposed at an edge of the second housing 14, and the plurality of clamping slots 131 are respectively in one-to-one correspondence with the plurality of clamping arms 141. With this arrangement, when the first housing 13 and the second housing 14 are joined to each other, the sealing performance of the first housing 13 and the second housing 14 can be ensured by the fitting of the snap groove 131 and the snap arm 141 to each other.

In the present embodiment, the mounting opening 11 is provided in the first housing 13, and the second housing 14 is provided with an outlet groove.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

1. the problem that the camera in the prior art is easy to fall ash when a lens is installed is effectively solved;

2. the performance is stable, and the control precision is high;

3. simple structure and easy operation.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. A back focus adjusting assembly, characterized in that, includes casing (10), casing (10) has and holds the chamber, the lateral wall of casing (10) have with hold the installation opening (11) that the chamber communicates, and back focus adjusting assembly still including being located respectively hold the inside in chamber:

a drive structure (20);

a lifting structure (30), wherein the driving structure (20) is in driving connection with the lifting structure (30) so that at least one part of the lifting structure (30) can move in the direction far away from or close to the mounting opening (11), and the driving structure (20) is close to the mounting opening (11) relative to the lifting structure (30);

the dustproof structure (40) is fixedly connected with the lifting structure (30) so that the dustproof structure (40) can move along with the lifting structure (30);

the dustproof sheet (50) is arranged on the dustproof structure (40), and the dustproof structure (40) is in driving connection with the dustproof sheet (50) so that the dustproof sheet (50) can move relative to the dustproof structure (40);

the sensor main board (60), the sensor main board (60) sets up the lifting structure (30) is kept away from one side of dustproof structure (40), just at least a part of dustproof structure (40) is located between the lifting structure (30) and the sensor main board (60).

2. The back focus adjustment assembly according to claim 1, wherein an inner side wall of the housing (10) on a side close to the mounting opening (11) has a limit structure having a limit space, and the driving structure (20) includes:

the driving motor (21), the said driving motor (21) is fixed to set up on the inside wall of the said body (10);

the driving frame (22), the driving frame (22) activity sets up the inside in spacing space, just driving motor (21) with driving frame (22) drive connection.

3. The back focus adjusting assembly according to claim 2, wherein the limiting structure comprises a plurality of limiting ribs (12), at least two of the limiting ribs (12) are symmetrically arranged about the mounting opening (11) to form the limiting space, and the driving frame (22) is movably arranged between the two limiting ribs (12) to enable the driving frame (22) to move along the length direction of the limiting ribs (12).

4. The back focus adjusting assembly according to claim 3, wherein the driving frame (22) is rectangular, and two sides of the driving frame (22) close to the two limiting ribs (12) are respectively parallel to the two limiting ribs (12).

5. A back focus adjustment assembly according to claim 4, wherein a driving gear is arranged on the driving motor (21), and the side of the driving frame (22) close to the driving motor (21) has a toothed section extending along its length, which is meshed with the driving gear.

6. The back focus adjusting assembly according to claim 2, wherein the inner side wall of the casing (10) near the side of the mounting opening (11) is further provided with a plurality of mounting grooves, the back focus adjusting assembly further comprises a plurality of balls (70), the plurality of balls (70) and the plurality of mounting grooves are in one-to-one correspondence, at least one part of the balls (70) is accommodated in the mounting grooves, and the other part of the balls (70) protrudes out of the mounting grooves and abuts against the driving frame (22).

7. The back focus adjusting assembly according to claim 4, wherein one side of the driving frame (22) facing the lifting structure (30) is provided with a plurality of pressing protrusions (221), the lifting structure (30) is provided with a plurality of pressing inclined surfaces (31) corresponding to the plurality of pressing protrusions (221), different pressing protrusions (221) are respectively abutted to different pressing inclined surfaces (31), and when the driving frame (22) moves along the length direction of the limiting convex rib (12), the pressing protrusions (221) move along the length direction of the pressing inclined surfaces (31) so that the lifting structure (30) moves along the direction away from or close to the mounting opening (11).

8. Back focus adjustment assembly according to claim 7, wherein the drive frame (22) is provided with at least one pressing protrusion (221) on each of three sequentially connected sides, and a receiving groove (222) is provided on one set of parallel sides of the three sequentially connected sides, the pressing slope (31) being able to enter or exit the receiving groove (222).

9. The back focus adjustment assembly according to any one of claims 1 to 8, further comprising a plurality of reset members (80), wherein at least one reset member (80) is disposed at each corner of the lifting structure (30), one end of the reset member (80) abuts against the inner sidewall of the housing (10), and the other end of the reset member (80) abuts against the lifting structure (30).

10. The back focus adjusting assembly according to claim 9, further comprising a plurality of fixing members, wherein a plurality of fixing holes are formed at the corners of the lifting structure (30), the plurality of resetting members (80), the plurality of fixing holes and the plurality of fixing members correspond to one another one by one, the fixing members penetrate through the fixing holes and are connected with the inner side wall of the housing (10), and the resetting members (80) are sleeved on the fixing members.

11. The back focus adjustment assembly according to any one of claims 1 to 8, wherein the dust-proof structure (40) comprises:

the dustproof sheet comprises a body part (41), wherein the body part (41) is provided with an avoiding opening and a sliding groove communicated with the avoiding opening, and the dustproof sheet (50) is movably arranged on the sliding groove;

the driving part (42) is arranged on the body part (41), and the driving part (42) is in driving connection with the dust-proof sheet (50) so that the dust-proof sheet (50) can shield or retract the avoiding opening into the body part (41).

12. The back focus adjusting assembly according to any one of claims 1 to 8, wherein the housing (10) comprises a first housing (13) and a second housing (14) which are spliced with each other, a plurality of clamping grooves (131) are formed in the edge of the first housing (13), a plurality of clamping arms (141) matched with the clamping grooves (131) are formed in the edge of the second housing (14), and the plurality of clamping grooves (131) are respectively in one-to-one correspondence with the plurality of clamping arms (141).

13. A camera, characterized in that it comprises a back focus adjustment assembly according to any one of claims 1 to 12.

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