WO2021135959A1

WO2021135959A1 - Light blocking device

Info

Publication number: WO2021135959A1
Application number: PCT/CN2020/137088
Authority: WO
Inventors: 王云; 罗成
Original assignee: 深圳光峰科技股份有限公司
Priority date: 2019-12-31
Filing date: 2020-12-17
Publication date: 2021-07-08
Also published as: CN211478842U

Abstract

Disclosed is a light blocking device (100), comprising a front support (1), a first baffle (2), a rear support (3) and a second baffle (4), wherein the front support (1) comprises a first support main body (11), a first sliding rail (12) and a first light passing port (110), and the first sliding rail (12) extends in a first direction; the first baffle (2) comprises a first main body portion (21) and a first sliding portion (22); the first main body portion (21) may slide relative to the front support (1) in the first direction by means of the first sliding portion (22), such that the first main body portion (21) at least partially covers the first light passing port (110); the rear support (3) comprises a second support main body (31), a second sliding rail (32), and a second light passing port (310) concentrically provided with the first light passing port (110); the second support main body (31) is fixed to the first support main body (11); the second sliding rail (32) extends in a second direction, and the second direction is perpendicular to the first direction; and the second baffle (4) comprises a second main body portion (41) and a second sliding portion (42), and the second main body portion (41) may slide relative to the rear support (3) in the second direction by means of the second sliding portion (42), such that the second main body portion (41) at least partially covers the second light passing port (310). Compared with the related art, the light blocking device (100) has a good blocking effect.

Description

Light blocking device

【Technical Field】

The utility model relates to the field of projection equipment, in particular to a light blocking device applied to the test of projection equipment.

【Background technique】

In real life, the application of projection equipment is more and more extensive. In order to ensure good projection and viewing effects, it is necessary to test the definition, brightness, contrast, and color saturation of the projection equipment.

In the projection screen test, the tester needs to set up multiple test points or divide multiple test areas in advance, and then use professional equipment to measure the parameters of each test point or test area; due to the large number of test points or test areas set, In order to ensure the test independence of each test point or test area, and to avoid the problem of visual impairment caused by the tester’s eyes working under the entire projection screen of the projection equipment for a long time, it is necessary to use a light blocking device to control the projection The projection screen of the device is blocked to expose the area to be tested.

In the related art, the light blocking device includes a bracket and a light blocking plate slidably connected to the bracket. The bracket is provided with a light opening through the bracket. During the test, the projection image of the projection device is displayed through the light opening, and the tester passes Slide and adjust the light-blocking plate to block the light opening to realize the shielding of the projected image.

However, in the related art, only the sliding adjustment of a single light barrier in a single direction is used to block the screen, so that the range of the blocking area of the light barrier by the light barrier is limited, resulting in poor blocking effect of the light blocking device, which cannot be guaranteed. Test independence in a smaller test area.

Therefore, it is necessary to provide a new light blocking device to solve the above technical problems.

[Utility model content]

The purpose of the utility model is to provide a light blocking device to solve the problem of poor blocking effect.

To achieve the above objective, the present invention provides a light blocking device, which includes:

A front bracket, the front bracket includes a first bracket body, a first slide rail fixed to the first bracket body, and a first light opening passing through the first bracket body. The first slide rail runs along the first Extending in a direction and parallel to one side of the first light opening;

The first baffle includes a first main body part and a first sliding part fixed to the first main body part. The first main body part communicates with the first sliding part through the first sliding part. The rails form a sliding connection, and the first main body part can slide relative to the front bracket in the first direction through the first sliding part, so that the first main body part at least partially covers the first light-passing mouth;

A rear bracket, the rear bracket includes a second bracket body, a second slide rail fixed to a side of the second bracket body away from the first bracket body, and a second light opening that penetrates the second bracket body, The second bracket body is fixed to a side of the first bracket body away from the first slide rail, the second slide rail extends in a second direction and is parallel to one side of the second light opening, so The second light opening and the first light opening are arranged concentrically, and the second direction and the first direction are perpendicular to each other;

The second baffle includes a second main body part and a second sliding part fixed to the second main body part. The second main body part communicates with the second sliding part through the second sliding part. The rail slide forms a dynamic connection, and the second main body part can slide relative to the rear bracket in the second direction through the second sliding part, so that the second main body part at least partially covers the second communication Light mouth.

Further, the area of the second light opening is larger than the area of the first light opening.

Further, the front bracket further includes a first fixing plate bent and extending from the top end of the first bracket body in a direction away from the second bracket body, and the first fixing plate is located on the first slide rail. A side away from the first light opening and parallel to the first slide rail, the first fixing plate is provided with a first slide groove extending therethrough along the second direction, and the first slide The groove extends along the first direction; the first body portion is provided with a first fixing hole at one end close to the first fixing plate, the front bracket further includes a first fastener, the first fastener It passes through the first sliding groove and is threadedly connected with the first fixing hole.

Further, the first baffle further includes a first push-pull plate bent and extended from the first main body to push the first baffle to slide in the first direction.

Further, the first slide rail includes an upper slide rail and a lower rail, the upper slide rail and the lower rail are arranged at intervals on opposite sides of the first light opening; the first sliding portion includes An upper sliding part corresponding to the upper sliding rail and a lower sliding part corresponding to the lower sliding rail, the first main body part is connected to the upper sliding rail and the lower sliding part respectively through the upper sliding part and the lower sliding part. The sliding rail forms a sliding connection.

Further, the first baffle includes two, and the two first baffles can completely block the first light opening.

Further, the rear bracket further includes a second fixing plate bent and extended from the second bracket body in a direction away from the first bracket body, and the second fixing plate is located on the second slide rail away from the first bracket body. One side of the second light opening, and the second fixing plate is parallel to the second sliding rail; the second fixing plate is provided with a second sliding groove passing through it along the first direction, so The second sliding groove extends along the second direction; an end of the second main body close to the second fixing plate is provided with a second fixing hole, the rear bracket further includes a second fastener, the first Two fasteners pass through the second sliding groove and are threadedly connected with the second fixing hole.

Further, the second baffle further includes a second push-pull plate bent and extended by the second main body to push the second baffle to slide in the second direction.

Further, the second slide rail includes a left slide rail and a right slide rail, the left slide rail and the right slide rail are arranged at intervals on opposite sides of the second light opening; the second slide part It includes a left sliding part corresponding to the left sliding rail and a right sliding part corresponding to the right sliding rail. The second main body part is connected to the left sliding part and the right sliding part respectively through the left sliding part and the right sliding part. The sliding rail and the right sliding rail form a sliding connection.

Further, the second baffle includes two, and the two second baffles can completely block the second light opening.

Further, the light blocking device further includes a bottom plate and a third fastener, and the front bracket further includes a third bracket extending from the bottom end of the first bracket body in a direction away from the second bracket body. A fixing plate, the third fixing plate is provided with a third sliding groove extending therethrough along the second direction, and the third sliding groove extends in a third direction, and the third direction is respectively the same as the first direction Perpendicular to the second direction, the third fastener passes through the third sliding groove and is threadedly connected to the bottom plate.

Further, the front support further includes a reinforcing rib bent and extended from the first support main body in a direction away from the second support main body, the reinforcing rib and the first fixing plate are perpendicular to each other, and the The reinforcing rib is fixedly connected with the third fixing plate.

Compared with the related art, in the light blocking device of the present invention, the first main body part is slidably connected with the first sliding rail through the first sliding part, and the first main body part can be relative to the front in the first direction through the first sliding part The bracket slides so that the first main body part at least partially covers the first light opening, the second main body is movably connected with the second sliding rail through the second sliding part, and the second main body can be moved along the second sliding part through the second sliding part. The direction is slid relative to the rear bracket so that the second main body part at least partially covers the second light opening; in the above-mentioned structure, the first baffle and the second baffle are arranged cooperatively, in the actual test, the light blocking device The projection screen of the projection device can be blocked in the first direction and the second direction respectively, that is, multi-directional blocking of the projection screen is realized, and the adjustment range of the light blocking device for blocking the projection screen is increased, so that the blocking effect is good. It not only ensures the test independence of the finely divided test area, but also has a simple structure and low cost.

【Explanation of the drawings】

In order to more clearly explain the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present utility model. For example, for those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

Figure 1 is a schematic diagram of the three-dimensional structure of the light blocking device of the present invention;

Figure 2 is a schematic diagram of the three-dimensional structure of the light blocking device of the present invention from another angle;

Figure 3 is a schematic diagram of the three-dimensional structure of the front bracket of the utility model;

Figure 4 is a schematic diagram of the three-dimensional structure of the rear bracket of the present invention.

【Detailed ways】

The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Examples. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present utility model.

Please refer to FIGS. 1-4 at the same time. The present invention provides a light blocking device 100, which includes a front bracket 1, a first baffle 2, a rear bracket 3, and a second baffle 4.

The front support 1 includes a first support main body 11 and a first sliding rail 12 fixed to the first support main body 11; the first support main body 11 is provided with a first light opening 110 penetrating therethrough, the The first sliding rail 12 extends along the first direction (ie, the X-axis direction) and is parallel to one side of the first light opening 110.

The first baffle 2 includes a first main body portion 21 and a first sliding portion 22 fixed to the first main body portion 21. The first main body portion 21 passes through the first sliding portion 22 and the first sliding portion 22. The sliding rail 12 forms a sliding connection.

The first main body portion 21 can slide relative to the front frame 1 in the first direction through the first sliding portion 22 to adjust the difference between the first main body portion 21 and the first light opening 110 The relative position between the first body part 21 is such that the first body part 21 at least partially covers the first light passage 110, that is, the first body part 21 partly covers the first light passage 110, or completely covers the first light passage 110. The first light-passing port 110, or all of them are outside the range of the first light-passing port 110.

Further, in order to improve the reliability of the fixation of the adjusted first baffle 2 and the front frame 1, the front frame 1 further includes a first frame bent and extended from the top end of the first frame body 11. A fixing plate 13, the first fixing plate 13 is located on the side of the first slide rail away from the first light opening, and parallel to the first slide rail 12, the first fixing plate 13 is The second direction (ie, the Z-axis direction) is provided with a first sliding groove 130 extending therethrough, and the first sliding groove 130 extends along the first direction; the first main body portion 21 is close to the first fixing plate One end of 13 is provided with a first fixing hole (not marked in the figure), the front bracket 1 further includes a first fastener (not marked in the figure), the first fastener passes through the first sliding groove 130 and Threaded connection with the first fixing hole.

When adjusting the relative position between the first baffle 2 and the front bracket 1, the first fastener is loosened, and the first baffle 2 can be slid in the first direction along the first direction. Slide in the groove 130. After the adjustment of the position of the first baffle 2 is completed, tighten the first fastener to lock the first baffle 2 to the first fixing plate 13, thereby achieving The positioning between the first baffle 2 and the front support 1.

More preferably, the first baffle 2 further includes a first push-pull plate 23 bent and extended by the first body portion 21, and the first push-pull plate 23 is used to push the first baffle 2 along the The sliding in the first direction makes the adjustment of the relative position of the first baffle 2 more convenient.

More preferably, the first slide rail 12 includes an upper slide rail 121 and a lower rail 122, and the upper slide rail 121 and the lower rail 122 are arranged on opposite sides of the first light opening 110 at intervals; The first sliding part 22 includes an upper sliding part 221 corresponding to the upper sliding rail 121 and a lower sliding part 222 corresponding to the lower sliding rail 122. The first main body part 21 passes through the upper sliding part 221. And the lower sliding portion 222 respectively form a sliding connection with the upper sliding rail 121 and the lower rail 122, the outer cylindrical surface of the upper sliding portion 221 is in close contact with the upper rail 121, and the lower sliding portion 222 The outer cylindrical surface is in close contact with the lower rail 122; the matching arrangement of the upper sliding portion 221 and the upper sliding rail 121 and the matching arrangement of the lower sliding portion 222 and the lower rail 122 effectively increase The support stability between the front support 1 and the first baffle 2 is improved, thereby further improving the reliability of the relative sliding between the two.

It is worth mentioning that the number of the first baffle 2 is not limited, and can be specifically set according to actual test requirements. For example, in this embodiment, the first baffle 2 includes two. The relative positions of the two first baffles 2 are coordinately adjusted to realize the shielding of the first light opening 110, and the two first baffles 2 are separated from each other or abut each other, when the two abut The first light opening 110 can be completely blocked.

The rear bracket 3 includes a second bracket body 31 and a second slide rail 32 fixed to the second bracket body. The second bracket body 31 is provided with a penetrating through it and being formed with the first light opening 110. Concentrically arranged second light opening 310; the second bracket body 31 is fixed to an end of the first bracket body 11 away from the first slide rail 12, the first fixing plate 13 and the first guide rail 12 It extends in a direction away from the second bracket body 31.

The second sliding rail 32 extends along a second direction (ie, the Z-axis direction) and is parallel to one side of the second light opening 310, and the second direction is perpendicular to the first direction.

It should be noted that the shapes of the first light opening 110 and the second light opening are not limited. For example, in this embodiment, the first light opening 110 and the second light opening are not limited. The openings 310 are all rectangular, and this shape setting can better match the shape of the projection screen of the projection device.

More preferably, in order to prevent the second light opening 310 from blocking the first light opening 110, as a more preferable implementation manner, the area of the second light opening 310 is larger than that of the first light opening. The area of the light opening 110 is to ensure that the projected image passing through the first light opening 110 can also pass through the second light opening 310 completely.

The second baffle 4 includes a second body portion 41 and a second sliding portion 42 fixed to the second body portion 41. The second body portion 41 passes through the second sliding portion 42 and the second sliding portion 42. The sliding rail 32 forms a sliding connection, and the second main body portion 41 can slide in the second direction relative to the rear bracket 3 through the second sliding portion 42 to adjust the second main body portion 41 and the rear bracket 3 The relative positions between the second light openings 310, so that the second main body 41 at least partially covers the second light opening 310, that is, the second main body 41 partially covers the second light opening 310 The opening 310 either completely covers the second light opening 310, or all is outside the range of the second light opening 310.

Further, in order to improve the reliability of the fixation of the adjusted second baffle 4 and the rear bracket 3, the rear bracket 3 further includes the second bracket body 31 moving away from the first bracket The second fixing plate 33 is bent and extended in the direction of the main body, and the second fixing plate 33 is located on the side of the second slide rail away from the second light opening, and the second fixing plate 33 and the The second sliding rails 32 are parallel; the second fixing plate 33 is provided with a second sliding groove 330 extending therethrough along the first direction, and the second sliding groove 330 extends along the second direction; the first The second main body 41 is provided with a second fixing hole (not shown in the figure) at one end close to the second fixing plate 33. The rear bracket 3 further includes a second fastener 34 through which the second fastener 34 passes The second sliding groove 330 is threadedly connected with the second fixing hole.

When adjusting the relative position between the second baffle 4 and the rear bracket 3, the second fastener 34 is loosened, and the second baffle 4 can be moved in the second direction along the second direction with the second baffle 4 Slide in the sliding groove 330, after the position adjustment of the second baffle 4 is completed, tighten the second fastener 34 to lock the second baffle 4 to the second fixing plate 33, In this way, the positioning between the second baffle 4 and the rear bracket 3 is realized. More preferably, the second baffle 4 further includes a second push-pull plate 43 bent and extended by the second main body portion 31, and the second push-pull plate 43 is used to push the second baffle 4 along the The sliding in the second direction makes the adjustment of the relative position of the second baffle 4 more convenient.

More preferably, the second slide rail 32 includes a left slide rail 321 and a right slide rail 322, and the left slide rail 321 and the right slide rail 322 are spaced apart on opposite sides of the second light opening 310 The second sliding part 42 includes a left sliding part 421 corresponding to the left sliding rail 321 and a right sliding part 422 corresponding to the right sliding rail 322, and the second main body 41 passes through the left The sliding part 421 and the right sliding part 422 form a sliding connection with the left sliding rail 321 and the right sliding rail 322, respectively, the outer cylindrical surface of the left sliding part 421 is in close contact with the left guide rail 321, and the The outer cylindrical surface of the right sliding part 422 is in close contact with the right guide rail 322; through the matching arrangement of the left sliding part 421 and the left sliding rail 321 and the coordination of the right sliding part 422 and the right sliding rail 322 The arrangement effectively increases the support stability between the rear bracket 3 and the second baffle 4, thereby further improving the reliability of the relative sliding between the two.

It is worth mentioning that the number of the second baffle 4 is not limited, and can be specifically set according to actual test requirements. For example, in this embodiment, the second baffle 4 includes two. Coordinately adjust the relative positions of the two second baffles 4 along the second direction to block the second light opening 310, and the two second baffles 4 are separated from each other or abut against each other, When the two are in contact, the second light opening 310 can be completely blocked.

In the above structure, through the arrangement of the first baffle 2 and the second baffle 4, in the actual test, the positions of the two first baffles 2 and the two second baffles 4 are coordinated to be adjusted, The stray light around the main projection beam is effectively blocked, which ensures the reliability of the test of the projection performance of the projection device, and at the same time, realizes that the light blocking device 100 can project the projection along the first direction and the second direction. The projection screen of the equipment is blocked, that is, the multi-directional blocking of the projection screen is realized, and the adjustment range for the blocking of the projection screen by the light blocking device is increased, so that the blocking effect is good, and the test independence of the finely divided test area is not only guaranteed And the structure is simple and the cost is low.

It should be noted that, in actual use, in order to facilitate the installation of a projection device (not shown) on the light blocking device 100 for testing, in this embodiment, the light blocking device 100 further includes The bottom plate 5 of the projection device and the third fastener (not shown in the figure).

The front bracket 1 further includes a third fixing plate 14 bent and extended from the bottom end of the first bracket body 11 in a direction away from the second bracket body. The third fixing plate 14 extends along the second bracket body. Direction is provided with a third sliding groove 140 extending therethrough, and the third sliding groove 140 extends along a third direction (ie, the Y-axis direction), and the third direction is different from the first direction and the second direction, respectively. vertical. The bottom plate 5 is arranged on the side of the front bracket 1 away from the rear bracket 3, and the projection device is installed on the bottom plate 5, and the projection image of the projection device is projected toward the first light-passing port 110 and passed through The second light opening 310 is threadedly connected to the bottom plate 5 through the third sliding groove 140 through the third fastener.

When adjusting the relative position between the front support 1 and the bottom plate 5, the third fastener is loosened and can slide in the third sliding groove 140 along the third direction with the first front support 1 , To adjust the relative position between the first light opening 110 and the second light opening 310 and the projection device, after the position adjustment of the front bracket 1 is completed, tighten the third fastener, In order to lock the front support 1 on the bottom plate 5, the positioning between the front support 1 and the bottom plate 5 is realized.

Through the arrangement of the third chute 140, the relative position between the bottom plate 5 and the front support 1 is continuously adjustable, and the relative position between the bottom plate 5 and the front support 1 is adjusted. , A projection image with a more regular shape can be obtained, so that the light blocking device 100 achieves a better light blocking effect, thereby avoiding the irregular projection image and affecting the normal test work, and better ensuring the reliability of the projection equipment test At the same time, it can better adapt to the projection images projected by lenses with different light angles or even different projection equipment, which improves the applicability of the light blocking device 100.

More preferably, the front support 1 further includes a reinforcing rib 15 that is bent and extended from the first support main body 11 in a direction away from the second support main body 31, and the reinforcing rib 15 is connected to the first fixing plate 13 are perpendicular to each other, and the reinforcing ribs 15 and the third fixing plate 14 are fixedly connected; the arrangement of the reinforcing ribs 15 effectively enhances the strength and rigidity of the front support 1 and further improves the front support 1 Reliability of fixing with the bottom plate 5.

Compared with the related art, in the light blocking device of the present invention, the first main body part is slidably connected with the first sliding rail through the first sliding part, and the first main body part can be relative to the front in the first direction through the first sliding part The bracket slides so that the first body part can at least partially cover the first light opening. The second body part is movably connected with the second slide rail through the second sliding part, and the second body part can be moved along the second sliding part through the second sliding part. Sliding with respect to the rear bracket in two directions, so that the second main body part can at least partially cover the second light opening; in the above-mentioned structure, through the arrangement of the first baffle and the second baffle, in the actual test, the light blocking device The projection screen of the projection device can be blocked in the first direction and the second direction, that is, multi-directional blocking of the projection screen is realized, and the adjustment range of the light blocking device for blocking the projection screen is increased, so that the blocking effect is good and not only guaranteed In addition, the test independence of the finely divided test area is simple, and the cost is low.

The above are only the embodiments of the present utility model. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these all belong to The scope of protection of the utility model.

Claims

A light blocking device, characterized in that it comprises:

A front bracket, the front bracket includes a first bracket body, a first slide rail fixed to the first bracket body, and a first light opening passing through the first bracket body. The first slide rail runs along the first Extending in a direction and parallel to one side of the first light opening;

The first baffle includes a first main body part and a first sliding part fixed to the first main body part. The first main body part communicates with the first sliding part through the first sliding part. The rails form a sliding connection, and the first main body part can slide relative to the front bracket in the first direction through the first sliding part, so that the first main body part at least partially covers the first light-passing mouth;

A rear bracket, the rear bracket includes a second bracket body, a second slide rail fixed to a side of the second bracket body away from the first bracket body, and a second light opening that penetrates the second bracket body, The second bracket body is fixed on a side of the first bracket body away from the first slide rail, and the second slide rail extends in a second direction and is parallel to one side of the second light opening, The second light opening and the first light opening are arranged concentrically, and the second direction and the first direction are perpendicular to each other;

The second baffle includes a second main body part and a second sliding part fixed to the second main body part. The second main body part communicates with the second sliding part through the second sliding part. The rail slide forms a dynamic connection, and the second main body part can slide relative to the rear bracket in the second direction through the second sliding part, so that the second main body part at least partially covers the second communication Light mouth.
The light blocking device according to claim 1, wherein the area of the second light opening is larger than the area of the first light opening.
The light blocking device according to claim 2, wherein the front bracket further comprises a first fixing plate bent and extended from the top end of the first bracket body in a direction away from the second bracket body, so The first fixing plate is located on a side of the first sliding rail away from the first light opening and parallel to the first sliding rail, and the first fixing plate is provided with penetrating through it along the second direction The first sliding groove on the upper part, the first sliding groove extends along the first direction; the end of the first main body close to the first fixing plate is provided with a first fixing hole, and the front bracket further includes a first fixing hole. A fastener, the first fastener passes through the first sliding groove and is threadedly connected with the first fixing hole.
The light blocking device according to claim 3, wherein the first baffle further comprises a bending extension of the first main body to push the first baffle to slide in the first direction The first push-pull board.
The light blocking device according to claim 3, wherein the first slide rail comprises an upper slide rail and a lower rail, and the upper slide rail and the lower rail are arranged at intervals of the first light opening. On opposite sides; the first sliding portion includes an upper sliding portion corresponding to the upper sliding rail and a lower sliding portion corresponding to the lower sliding rail. The first main body passes through the upper sliding portion and the The lower sliding part forms a sliding connection with the upper sliding rail and the lower sliding rail respectively.
The light blocking device according to claim 5, wherein the first baffle includes two, and the two first baffles can completely block the first light opening.
The light blocking device according to claim 2, wherein the rear bracket further comprises a second fixing plate bent and extended from the second bracket body in a direction away from the first bracket body, and the first bracket body is bent and extended. Two fixing plates are located on the side of the second sliding rail away from the second light opening, and the second fixing plate is parallel to the second sliding rail; the second fixing plate is along the first direction There is a second sliding groove penetrating therethrough, and the second sliding groove extends along the second direction; an end of the second main body close to the second fixing plate is provided with a second fixing hole, and the rear The bracket further includes a second fastener, which passes through the second sliding groove and is threadedly connected with the second fixing hole.
The light blocking device according to claim 7, wherein the second baffle further comprises a bending extension of the second main body to push the second baffle to slide in the second direction The second push-pull board.
The light blocking device according to claim 7, wherein the second slide rail comprises a left slide rail and a right slide rail, and the left slide rail and the right slide rail are spaced apart from the second light guide rail. The second sliding part includes a left sliding part corresponding to the left sliding rail and a right sliding part corresponding to the right sliding rail. The second main body part passes through the left sliding part. And the right sliding part respectively form a sliding connection with the left sliding rail and the right sliding rail.
8. The light blocking device according to claim 8, wherein the second baffle includes two, and the two second baffles can completely block the second light opening.
The light blocking device according to any one of claims 1-10, wherein the light blocking device further comprises a bottom plate and a third fastener, and the front bracket further comprises a bottom of the first bracket body. A third fixing plate extending in a direction away from the second bracket main body is bent and extended. The third fixing plate is provided with a third sliding groove extending therethrough along the second direction, and the third sliding groove extends along the The third direction extends, the third direction is perpendicular to the first direction and the second direction respectively, and the third fastener passes through the third sliding groove and is threadedly connected to the bottom plate.
The light blocking device according to claim 11, wherein the front support further comprises a reinforcing rib that is bent and extended from the first support main body in a direction away from the second support main body, the reinforcing ribs and The first fixing plates are perpendicular to each other, and the reinforcing ribs are fixedly connected to the third fixing plate.