Multi-axis movement mechanism of mechanical telescopic screen

Abstract

The invention relates to the technical field of lamps, in particular to a mechanical telescopic screen multi-axis movement mechanism which comprises a mounting support, an adjusting mechanism arranged in the mounting support and a screen body arranged at the end of the adjusting mechanism and connected to the mounting support. The plurality of screen bodies and the plurality of adjusting mechanisms are arranged relative to the plurality of mounting cavities, and each adjusting mechanism corresponds to one mounting cavity and is coaxial with the mounting cavity; the adjusting mechanism comprises a telescopic assembly and a multidirectional adjusting assembly, the telescopic assembly is connected to the mounting cavity and is provided with a connecting part relative to the screen body, the screen body is provided with a matching part relative to the connecting part, and the multidirectional adjusting assembly wraps the telescopic assembly. The telescopic screen can be rapidly and stably unfolded or folded, the screen has more adjusting freedom degrees, and the display effect is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, and in particular to a multi-axis motion mechanism for a mechanical telescopic screen. Background Technology

[0002] Mechanical telescopic screens achieve changes in display area by unfolding and retracting movable panels, and are widely used in stage backdrops, exhibition halls, advertising displays, and other scenarios. Most existing conventional telescopic screens use a single-axis linear telescopic mechanism that only drives the panel to translate in one direction, making them unsuitable for displaying non-planar or complex curved surfaces. When multiple panels are spliced ​​together, the inability to adjust their orientation leads to misalignment or excessive gaps at the seams, affecting visual continuity and resulting in insufficient freedom of movement. Furthermore, the natural frequency of the multi-stage telescopic structure decreases in the unfolded state, and external stimuli (such as stage vibrations or airflow disturbances) induce panel resonance, causing image blurring. Traditional mechanical locking devices have slow response times and struggle to suppress flutter in real time. Summary of the Invention

[0003] The main objective of this invention is to provide a multi-axis motion mechanism for a mechanical telescopic screen, which enables the telescopic screen to be quickly and stably extended or retracted, and gives the screen more degrees of adjustment freedom to ensure the display effect.

[0004] To achieve the above objectives, the present invention proposes a multi-axis motion mechanism for a mechanical telescopic screen, comprising a mounting bracket, an adjustment mechanism disposed within the mounting bracket, and a screen body disposed at the end of the adjustment mechanism and connected to the mounting bracket. The mounting bracket is provided with a plurality of open mounting cavities in an array. The screen body and the adjustment mechanism are provided with a plurality of mounting cavities relative to the plurality of mounting cavities. Each adjustment mechanism corresponds to one mounting cavity and is coaxially arranged with the mounting cavity.

[0005] The adjustment mechanism includes a telescopic component and a multi-directional adjustment component. The telescopic component is connected to the mounting cavity and has a connecting part relative to the screen body. The screen body has a mating part relative to the connecting part. The multi-directional adjustment component surrounds the telescopic component.

[0006] In one embodiment of this application, the telescopic component includes a defined housing connected to the mounting cavity, a drive component disposed within the defined housing, and a lifting component passing through the defined housing and connected to the drive component, wherein the connecting portion is connected to the end of the lifting component opposite to the drive component.

[0007] In one embodiment of this application, the lifting assembly includes a plurality of lifting members coaxially arranged and sequentially nested together. A guide block protrudes from the outer periphery of the lifting member, and a guide groove is formed on the inner wall of the lifting member. A limiting groove is formed in the limiting housing relative to the guide block.

[0008] The guide block of the latter lifting component is slidably connected to the guide groove of the former lifting component.

[0009] In one embodiment of this application, the drive assembly includes a first drive shaft connected to the lifting member and a plurality of second drive shafts sequentially sleeved and connected to the first drive shaft. The first drive shaft and the plurality of second drive shafts are coaxially arranged, and the number of second drive shafts is one less than the number of lifting members.

[0010] The second drive shaft is sleeved on the first drive shaft or the preceding second drive shaft, and each second drive shaft is connected to a lifting component.

[0011] In one embodiment of this application, the bottom wall of the first lifting member protrudes towards the second lifting member and is provided with a stabilizing part. The first second drive shaft is connected to the first lifting member, and the second second drive shaft is connected to the first second drive shaft and is provided with a mating cavity relative to the stabilizing part. The mating cavity surrounds the stabilizing part.

[0012] In one embodiment of this application, the multi-directional adjustment component includes multiple adjustment structures. Each of the multiple adjustment structures has a universal motion component connected to the screen body at the end away from the mounting cavity. The multiple universal motion components are all located on the same circumference with the mating part as the center and bisect the circumference.

[0013] In one embodiment of this application, the adjusting structure is a cylinder, one end of the adjusting structure is connected to the mounting cavity, and the other end is connected to the universal motion component. Each adjusting structure is used to drive the screen body to rise or fall along the movement direction of the adjusting structure.

[0014] In one embodiment of this application, the universal motion assembly includes a connector connected to the steering structure and a mating member connected to the screen body. An adjusting member is provided between the connector and the mating member. One side of the adjusting member is rotatably connected to the connector, and the other side is rotatably connected to the mating member.

[0015] In one embodiment of this application, the mating member has a rotating cavity at one end facing the connector, and one side of the adjusting member is rotatably connected to the rotating cavity.

[0016] In one embodiment of this application, a light-shielding part protrudes from the outer periphery of the screen body towards the mounting cavity, and the screen body and the light-shielding part are sandwiched together to form a light-shielding cavity.

[0017] By adopting the above technical solution, the present invention has the following advantages:

[0018] The mechanical telescopic screen includes a single mounting bracket for fixing the entire screen structure. Using the mounting bracket as a base facilitates the storage of the entire screen structure. In particular, the mechanical telescopic screen itself is composed of multiple screen bodies. The mounting bracket has a mounting cavity for each screen body, and each screen body is connected to an adjustment mechanism housed in the mounting cavity. The adjustment mechanism is used to drive the screen body to extend / retract and can also be used to adjust the orientation of the screen body. Multiple screen bodies can be adjusted independently and freely. Through the above structure, the entire screen has more degrees of adjustment freedom, which can ensure the display effect.

[0019] The screen body and the mounting cavity are connected accordingly, and each adjustment mechanism is coaxially set with the mounting cavity. This allows multiple degrees of freedom of the adjustment structure to be evenly connected to the screen body, ensuring that the background program can stably control the orientation of the screen body, and also ensuring that the screen body can be stably unfolded or retracted.

[0020] The adjustment mechanism itself consists of a telescopic component for controlling the extension distance of the screen body and ensuring the stability of the screen body extension, and a multi-directional adjustment component for adjusting the orientation of the screen body with multiple degrees of freedom. The telescopic component can fix the extension distance of the center of the screen body. When the telescopic component is working, the multi-directional adjustment component on the outer periphery of the telescopic component can guide the screen body. When the extension distance is determined, the multi-directional adjustment component can ensure that the screen body responds quickly and adjusts the orientation of the screen, so that the entire mechanical telescopic screen can have multiple display patterns and display angles.

[0021] The telescopic component has a connecting part at its end. In this application, the connecting part is a spherical connecting structure. The screen body has a mating part relative to the connecting part. The connecting part passes through the mating part. The screen body can be rotatably connected to the connecting part through the mating part. This allows the telescopic component to stably drive the screen body to extend and retract while the multi-directional adjustment component can freely drive the screen body to rotate stably, ensuring the display effect of the screen itself. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the multi-axis motion mechanism of the mechanical telescopic screen of the present invention;

[0024] Figure 2 This is a cross-sectional view of the multi-axis motion mechanism of the mechanical telescopic screen of the present invention;

[0025] Figure 3for Figure 2 A magnified view of a section at point A in the middle;

[0026] Figure 4 This is a schematic diagram of the telescopic component of the multi-axis motion mechanism of the mechanical telescopic screen of the present invention.

[0027] Explanation of icon numbers:

[0028] 1. Mounting bracket; 11. Mounting cavity; 2. Adjustment mechanism; 3. Telescopic assembly; 31. Connecting part; 32. Limiting housing; 4. Drive assembly; 41. First drive shaft; 42. Second drive shaft; 43. Mating cavity; 5. Lifting assembly; 51. Lifting component; 52. Guide block; 53. Guide groove; 54. Stabilizing part; 6. Multi-directional adjustment assembly; 61. Adjustment structure; 7. Universal motion assembly; 71. Connecting part; 72. Mating part; 73. Adjusting part; 8. Screen body; 81. Mating part; 82. Light-shielding part.

[0029] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0031] Reference Figures 1 to 4 To achieve the above objectives, the present invention proposes a multi-axis motion mechanism for a mechanical telescopic screen, comprising a mounting bracket 1, an adjustment mechanism 2 disposed within the mounting bracket 1, and a screen body 8 disposed at the end of the adjustment mechanism 2 and connected to the mounting bracket 1. The mounting bracket 1 is provided with a plurality of open mounting cavities 11 arranged in an array. The screen body 8 and the adjustment mechanism 2 are provided with a plurality of mounting cavities 11 relative to the plurality of mounting cavities 11. Each adjustment mechanism 2 corresponds to one mounting cavity 11 and is coaxially arranged with the mounting cavity 11.

[0032] The adjustment mechanism 2 includes a telescopic component 3 and a multi-directional adjustment component 6. The telescopic component 3 is connected to the mounting cavity 11 and has a connecting part 31 relative to the screen body 8. The screen body 8 has a mating part 81 relative to the connecting part 31. The multi-directional adjustment component 6 is wrapped around the telescopic component 3.

[0033] The mechanical telescopic screen includes a single mounting bracket 1 for fixing the entire screen structure. Using the mounting bracket 1 as a base facilitates the storage of the entire screen structure. Specifically, the mechanical telescopic screen itself is composed of multiple screen bodies 8. The mounting bracket 1 has a mounting cavity 11 for each screen body 8, and each screen body 8 is connected to an adjustment mechanism 2 housed in the mounting cavity 11. The adjustment mechanism 2 is used to drive the screen body 8 to extend / retract and can also be used to adjust the orientation of the screen body 8. Multiple screen bodies 8 can be adjusted independently and freely. Through the above structure, the entire screen has more degree of adjustment freedom and can ensure the display effect.

[0034] The screen body 8 and the mounting cavity 11 are connected accordingly, and each adjustment mechanism 2 is coaxially set with the mounting cavity 11, which enables multiple degrees of freedom of the adjustment structure to be evenly connected to the screen body 8, ensuring that the background program can stably control the orientation of the screen body 8, and ensuring that the screen body 8 can be stably unfolded or retracted.

[0035] The adjustment mechanism 2 itself consists of a telescopic component 3 for controlling the extension distance of the screen body 8 and ensuring the stability of the extension of the screen body 8, and a multi-directional adjustment component 6 for adjusting the orientation of the screen body 8 with multiple degrees of freedom. The telescopic component 3 can fix the extension distance of the center of the screen body 8. When the telescopic component 3 is working, the multi-directional adjustment component 6 located on the outer periphery of the telescopic component 3 can guide the screen body 8. When the extension distance is determined, the multi-directional adjustment component 6 can ensure that the screen body 8 responds quickly and adjusts the orientation of the screen, so that the entire mechanical telescopic screen can have multiple display patterns and display angles.

[0036] The end of the telescopic component 3 is provided with a connecting part 31. In this application, the connecting part 31 is a spherical connecting structure. The screen body 8 is provided with a mating part 81 relative to the connecting part 31. The connecting part 31 passes through the mating part 81. The screen body 8 can be rotatably connected to the connecting part 31 through the mating part 81. This allows the telescopic component 3 to stably drive the screen body 8 to extend and retract, while the multi-directional adjustment component 6 can freely drive the screen body 8 to rotate stably, ensuring the display effect of the screen itself.

[0037] See also Figures 2 to 4 The telescopic component 3 includes a limiting housing 32 connected to the mounting cavity 11, a drive component 4 disposed within the limiting housing 32, and a lifting component 5 passing through the limiting housing 32 and connected to the drive component 4. The connecting part 31 is connected to the end of the lifting component 5 that is away from the drive component 4.

[0038] The housing 32 serves as the base for the entire telescopic assembly 3, ensuring the stability of the entire telescopic process. The lifting assembly 5 is connected to the drive housing, and the lifting assembly 5 is provided with a connecting part 31. The lifting assembly 5 is connected to the base as a movable telescopic unit. Meanwhile, the drive assembly 4 in the base is connected to the lifting assembly 5. Under the action of the drive assembly 4, the lifting assembly 5 can respond quickly and can achieve the extension and retraction of the screen at high speed and stability, thereby improving the display stability of the telescopic screen.

[0039] See also Figures 2 to 4 The lifting assembly 5 includes multiple lifting components 51 that are coaxially arranged and sequentially nested together. A guide block 52 protrudes from the outer periphery of the lifting component 51, and a guide groove 53 is formed on the inner wall of the lifting component 51. A limiting groove is formed in the housing 32 relative to the guide block 52.

[0040] The guide block 52 of the subsequent lifting component 51 is slidably connected to the guide groove 53 of the preceding lifting component 51.

[0041] The lifting assembly 5 includes multiple lifting components 51 arranged sequentially. The lifting component 51 in the initial position is fitted inside the limiting housing 32. Multiple guide blocks 52 protrude from the outer periphery of the lifting component 51, and guide grooves 53 are formed on the inner wall of the lifting component 51. Adjacent lifting components 51 are slidably connected, and the guide block 52 of the subsequent lifting component 51 is slidably connected to the guide groove 53 of the previous lifting component 51 to ensure the stability of the lifting assembly 5 during lifting. At the same time, the inner wall of the limiting housing 32 is provided with a limiting groove, and the guide block 52 of the lifting component 51 in the initial position is connected to the limiting groove. Through the above structure, the lifting assembly 5 can be more stable during lifting. At the same time, the multiple guide blocks 52 distributed on the outer periphery of the lifting component 51 can limit the path of the lifting component 51, effectively preventing the lifting component 51 from rotating during lifting and avoiding damage to the lifting assembly 5.

[0042] See also Figures 2 to 3 The drive assembly 4 includes a first drive shaft 41 connected to the lifting member 51 and a plurality of second drive shafts 42 sequentially sleeved and connected to the first drive shaft 41. The first drive shaft 41 and the plurality of second drive shafts 42 are coaxially arranged, and the number of second drive shafts 42 is one less than the number of lifting members 51.

[0043] The second drive shaft 42 is sleeved on the first drive shaft 41 or the previous second drive shaft 42, and each second drive shaft 42 is connected to a lifting component 51.

[0044] The drive assembly 4 itself includes a first drive shaft 41 and a second drive shaft 42 with external threads. The inner wall of the second drive shaft 42 is provided with internal threads. The first drive shaft 41 is used to connect to a drive mechanism (such as a motor) for driving the entire lifting assembly 5 to lift. The first drive shaft 41 is installed at the bottom of the limiting housing 32 and the first drive shaft 41 drives the lifting member 51 connected to the initial position.

[0045] Multiple second drive shafts 42 are sequentially mounted, and each of the multiple second drive shafts 42 corresponds to multiple other lifting components 51 except for the initial lifting component 51. When the first drive shaft 41 rotates, the external thread of the first drive shaft 41 will transmit power to the multiple second drive shafts 42 through the external and internal threads of the second drive shafts 42. Under the action of the above structure, the multiple second drive shafts 42 will rise and fall synchronously, which can effectively improve the lifting efficiency. At the same time, each lifting component 51 is connected to a drive shaft and is threaded to the drive shaft. In addition, the rotation of each lifting component 51 is restricted from each other, so that the lifting component 51 can only rise and fall without rotating, which can effectively reduce energy loss. Each lifting component 51 will rise and fall synchronously, which can maximize the lifting effect and effectively improve the display effect of the screen.

[0046] See also Figure 3 The bottom wall of the front lifting member 51 protrudes towards the rear lifting member 51 and is provided with a stabilizing part 54. The front second drive shaft 42 is connected to the front lifting member 51, and the rear second drive shaft 42 is connected to the front second drive shaft 42 and is provided with a mating cavity 43 relative to the stabilizing part 54. The mating cavity 43 surrounds the stabilizing part 54.

[0047] The lifting member 51 is provided with a stabilizing part 54 protruding from the drive shaft. The stabilizing part 54 can increase the contact area between the lifting member 51 and the drive shaft used to drive the lifting member 51, which can effectively improve the stability of lifting.

[0048] The drive shaft used to drive the lifting component 51 is also connected to the next second drive shaft 42. The second drive shaft 42 is connected to the stabilizing part 54. At the same time, the second drive shaft 42 can be provided with a mating cavity 43 relative to the stabilizing part 54. By using the mating cavity 43 to surround the stabilizing part 54, the stability of the entire lifting component 5 can be guaranteed, and the structural strength of the lifting component 5 can be effectively guaranteed during high-speed response, avoiding structural damage.

[0049] See also Figures 1 to 2 The multi-directional adjustment component 6 includes multiple adjustment structures 61. Each of the multiple adjustment structures 61 has a universal motion component 7 connected to the screen body 8 at the end away from the mounting cavity 11. The multiple universal motion components 7 are all on the same circumference with the mating part 81 as the center and bisect the circumference.

[0050] To enable the screen on the mechanical telescopic screen to freely adjust its orientation, a multi-directional adjustment component 6 is provided. The multi-directional adjustment component 6 includes multiple adjustment structures 61 connected to the screen body 8 via universal motion components 7. To enable the screen to freely adjust its orientation, at least three adjustment structures 61 are provided. The three adjustment structures 61 are equidistant from the axis of the screen body 8 and are evenly spaced, which ensures that the screen body 8 can easily turn at different angles. At the same time, when the lifting component 5 responds, the multiple adjustment structures 61 can act as limit guide rods to ensure the stability of the lifting.

[0051] See also Figures 1 to 2 The adjusting structure 61 is a cylinder. One end of the adjusting structure 61 is connected to the mounting cavity 11, and the other end is connected to the universal motion component 7. Each adjusting structure 61 is used to drive the screen body 8 to rise or fall along the movement direction of the adjusting structure 61.

[0052] See also Figure 2 The universal motion assembly 7 includes a connector 71 connected to the directional adjustment structure 61 and a mating part 72 connected to the screen body 8. An adjustment part 73 is provided between the connector 71 and the mating part 72. One side of the adjustment part 73 is rotatably connected to the connector 71, and the other side is rotatably connected to the mating part 72.

[0053] The universal motion component 7 connects the orientation structure 61 and the screen body 8 through the connector 71 and the mating part 72. The adjusting part 73 is centered for adjustment. The two ends of the adjusting part 73 are connected to the connector 71 and the mating part 72 respectively, and both are rotatable connections. The rotation direction of the two ends of the adjusting part 73 is vertical, which allows the universal motion component 7 to rotate in any direction and ensures the smooth rotation of the screen body 8.

[0054] See also Figure 2 The mating part 72 has a rotating cavity at one end facing the connecting part 71, and one side of the adjusting part 73 is rotatably connected to the rotating cavity.

[0055] The adjusting component 73 rotates within the rotating cavity of the mating component 72. Through the rotating cavity, the mating component 72 can be more stably connected to the adjusting component 73, ensuring the stability of the entire system.

[0056] See also Figures 1 to 2 A light-shielding part 82 protrudes from the outer periphery of the screen body 8 towards the mounting cavity 11, and the screen body 8 and the light-shielding part 82 are sandwiched together to form a light-shielding cavity.

[0057] The outer periphery of the screen body 8 is provided with a light-shielding part 82 facing the mounting cavity 11, which can minimize the exposure of the telescopic component 3 during the extension and rotation of the screen body 8, and can be used to hide the internal structure and improve the display effect.

[0058] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0059] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-axis motion mechanism for a mechanical telescopic screen, characterized in that, The device includes a mounting bracket, an adjustment mechanism disposed within the mounting bracket, and a screen body disposed at the end of the adjustment mechanism and connected to the mounting bracket. The mounting bracket is provided with multiple open mounting cavities in an array. The screen body and the adjustment mechanism are provided with multiple mounting cavities relative to the multiple mounting cavities. Each adjustment mechanism corresponds to one mounting cavity and is coaxially arranged with the mounting cavity. The adjustment mechanism includes a telescopic component and a multi-directional adjustment component. The telescopic component is connected to the mounting cavity and has a connecting part relative to the screen body. The screen body has a mating part relative to the connecting part. The multi-directional adjustment component surrounds the telescopic component.

2. The multi-axis motion mechanism for a mechanical telescopic screen according to claim 1, characterized in that, The telescopic assembly includes a defined housing connected to the mounting cavity, a drive assembly disposed within the defined housing, and a lifting assembly passing through the defined housing and connected to the drive assembly, wherein the connecting portion is connected to the end of the lifting assembly opposite to the drive assembly.

3. The multi-axis motion mechanism for a mechanical telescopic screen according to claim 2, characterized in that, The lifting assembly includes multiple lifting components coaxially arranged and sequentially nested together. The outer periphery of each lifting component is provided with a guide block, and the inner wall of each lifting component is provided with a guide groove. The limiting housing is provided with a limit groove relative to the guide block. The guide block of the latter lifting component is slidably connected to the guide groove of the former lifting component.

4. The multi-axis motion mechanism for a mechanical telescopic screen according to claim 3, characterized in that, The drive assembly includes a first drive shaft connected to the lifting member and a plurality of second drive shafts sequentially sleeved and connected to the first drive shaft. The first drive shaft and the plurality of second drive shafts are coaxially arranged, and the number of second drive shafts is one less than the number of lifting members. The second drive shaft is sleeved on the first drive shaft or the preceding second drive shaft, and each second drive shaft is connected to a lifting component.

5. The multi-axis motion mechanism for a mechanical telescopic screen according to claim 4, characterized in that, The bottom wall of the first lifting member protrudes towards the second lifting member and is provided with a stabilizing part. The first second drive shaft is connected to the first lifting member, and the second second drive shaft is connected to the first second drive shaft and is provided with a mating cavity relative to the stabilizing part. The mating cavity surrounds the stabilizing part.

6. The multi-axis motion mechanism for a mechanical telescopic screen according to claim 1, characterized in that, The multi-directional adjustment component includes multiple adjustment structures. Each of the multiple adjustment structures has a universal motion component connected to the screen body at the end away from the mounting cavity. All of the multiple universal motion components are located on the same circumference with the mating part as the center and bisect the circumference.

7. The multi-axis motion mechanism for a mechanical telescopic screen according to claim 6, characterized in that, The adjusting structure is a cylinder. One end of the adjusting structure is connected to the mounting cavity, and the other end is connected to the universal motion component. Each adjusting structure is used to drive the screen body to rise or fall along the movement direction of the adjusting structure.

8. The multi-axis motion mechanism for a mechanical telescopic screen according to claim 6, characterized in that, The universal motion assembly includes a connector connected to the orientation adjustment structure and a mating component connected to the screen body. An adjustment component is provided between the connector and the mating component. One side of the adjustment component is rotatably connected to the connector, and the other side is rotatably connected to the mating component.

9. A multi-axis motion mechanism for a mechanical telescopic screen according to claim 8, characterized in that, The mating component has a rotating cavity at one end facing the connector, and one side of the adjusting component is rotatably connected to the rotating cavity.

10. A multi-axis motion mechanism for a mechanical telescopic screen according to claim 1, characterized in that, The screen body has a light-shielding part protruding from the side facing the mounting cavity on its outer periphery, and the screen body and the light-shielding part are sandwiched together to form a light-shielding cavity.

Images