Auxiliary mechanism for collecting screens

By designing an auxiliary mechanism for screen processing, the use of threaded rods and drive motors to achieve rapid disassembly and movement of the top plate and push plate, the debris accumulation problem caused by naked slide rails is solved, and the collection efficiency and maintenance convenience are improved, ensuring that Stable operation of the equipment.

CN222204085UActive Publication Date: 2024-12-20SHENZHEN KELAI INTELLIGENT DISPLAY CO LTD
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Patent Information

Application Number
CN202420224836.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-01-29
Publication Date
2024-12-20
Estimated Expiration
2034-01-29

AI Technical Summary

Technical Problem

In existing screen processing equipment, exposed slide rails lead to debris accumulation and affect the movement of the sweeping base plate, and the push plate is inconvenient to disassemble, which requires external tools to affect collection efficiency and maintenance.

Method used

An auxiliary mechanism is designed, including a collection seat, a storage bed, a push plate and a driving mechanism. The first one-way threaded rod and a driving motor realize the rapid removal and movement of the top plate and push plate to prevent debris from falling into the threaded rod. Positioning slots and rubber pads facilitate installation and observation, and promote heat dissipation through strip slots.

Benefits of technology

It realizes rapid disassembly and maintenance of the top plate and push plate, avoids debris affecting collection, improves collection efficiency and safety, reduces dependence on external tools, and enhances the convenience of use of equipment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an auxiliary mechanism for collecting screen, including collection seat and fixed connection collection seat one end outer wall top, the collection seat other end bottom is provided with the collection box, and the both sides outer wall of collection box is provided with the side groove, the one side outer wall of collection seat is equipped with the control panel, and the control panel is equipped with the control panel. A storage battery is arranged in the collecting base and electrically connected with the control panel. According to the storage bed, through the arranged fixing mechanism, the top plate and the push plate can be conveniently and rapidly detached from the moving block, follow-up maintenance or cleaning of workers on the push plate is facilitated, meanwhile, external tools are not needed in the detaching process, use is facilitated, the first one-way threaded rods are all arranged on the outer side of the storage bed, and the storage bed is convenient to use. Therefore, the screen leftover materials cannot fall on the first one-way threaded rod when falling off, the top plate cannot be affected to drive the push plate to push the scrap leftover materials, collection of the screen leftover materials cannot be affected, and use is facilitated.
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Description

Technical Field

[0001] The utility model relates to the technical field of screen collection, in particular to an auxiliary mechanism for collecting screens. Background Art

[0002] A screen is a device or appliance used to display images and colors. It is divided into a silver screen and a screen, also known as a display screen. It is widely used in mobile phones, computers, monitors, televisions, and devices with image or text display functions. During the screen processing process, debris and scraps often fall from the screen. In order to save resources, it is often necessary to collect and recycle the screen scraps.

[0003] After searching, the patent publication number "CN215966988U" is a scrap collection device for screen processing laser cutting equipment, including an external frame and a movable plate arranged on one side of the external frame, slide rails are arranged on both sides of the external frame, and first scrap collection components movably connected to both sides of the slide rails are arranged on both sides of the external frame. The first scrap collection component includes a top plate movably connected to both sides of the slide rails and reciprocating at both ends of the slide rails, and the bottom of the top plate is connected to a sweeping bottom plate for sweeping and gathering scraps through a fixing. The technical solution of this utility model solves the problem of low efficiency and space occupation in the existing technology of scrap collection by manual and mechanical hands.

[0004] The above technical features have the following deficiencies: the slide rails in the above devices are exposed to the outside, and therefore, during use, if debris falls and accumulates on the slide rails, it will affect the movement of the sweeping base plate, thereby affecting the collection of screen scraps. At the same time, the push plates for pushing the scraps in most devices are not easy to disassemble quickly, and most of them are fixed with fixing bolts, and therefore external tools are required for disassembly and installation. If there are no tools around, it is inconvenient for the staff to install and disassemble the push plates, and thus it is inconvenient for the staff to subsequently replace or maintain the push plates. Therefore, it is urgent to design an auxiliary mechanism for collecting screens to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an auxiliary mechanism for collecting screens to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An auxiliary mechanism for collecting screens, comprising a collecting seat and a storage bed fixedly connected to the top of the outer wall of one end of the collecting seat, a collecting box is arranged at the bottom of the other end of the collecting seat, and side grooves are opened on the outer walls of both sides of the collecting box, a control panel is installed on the outer wall of one side of the collecting seat, a storage battery is arranged inside the collecting seat, and the storage battery is electrically connected to the control panel, transverse grooves are opened on the outer walls of both sides of the storing bed, a first one-way threaded rod is rotatably connected between the inner wall of one end of the transverse groove and the outer wall of one end of the collecting seat through a bearing, a moving block is rotatably sleeved on one end of the circumferential outer wall of the first one-way threaded rod through a thread, and a top plate is arranged on the top outer wall of the moving block, a push plate is fixedly connected to the bottom outer wall of the top plate, and a fixing mechanism is arranged on the top of the moving block for facilitating quick disassembly and assembly of the top plate from the moving block;

[0008] The bottom of the outer walls on both sides of the storage bed are fixedly connected to mounting plates, and the top outer walls of the mounting plates are provided with multiple mounting holes distributed at equal distances. One end of the storage bed is provided with a driving mechanism for rotating the two first unidirectional threaded rods, and the collection seat is provided with a moving mechanism for taking out the collection box.

[0009] Preferably, the fixing mechanism includes two second one-way threaded rods, which are respectively fixedly connected to the top outer walls of the two moving blocks, and circular grooves are opened on both sides of the top outer wall of the top plate, and the second one-way threaded rods are inserted into the circular grooves, and the top of the circumferential outer wall of the second one-way threaded rod is connected with a locking cap through a threaded rotation.

[0010] Preferably, the driving mechanism includes a protective shell, which is installed on the outer wall of one end of the collecting seat, and the main gear and the sub-gear are rotatably connected to both sides of the outer wall of one end of the storage bed through bearings, and a toothed belt is provided at one end of the storage bed, and the main gear and the sub-gear are meshed with the toothed belt, and the outer walls of one end of the two first unidirectional threaded rods are fixedly connected to the outer walls of the other ends of the main gear and the sub-gear, respectively, and a second driving motor is installed on the inner wall of one end of the protective shell, the battery and the control panel are electrically connected to the second driving motor, and one end of the output shaft of the second driving motor is fixedly connected to the outer wall of one end of the main gear.

[0011] Preferably, the moving mechanism includes a first drive motor, and the battery and the control panel are all connected to the first drive motor. The first drive motor is installed at the bottom of the outer wall of the other end of the collecting seat. A bottom groove is opened on the bottom inner wall of the collecting seat. A third one-way threaded rod is rotatably connected between the inner walls at both ends of the bottom groove through a bearing. The other end of the circumferential outer wall of the third one-way threaded rod is rotatably sleeved with a placement plate through a thread. The collection box is placed on the top of the placement plate, and one end of the output shaft of the first drive motor is fixedly connected to the outer wall of the other end of the third one-way threaded rod.

[0012] Preferably, the top outer walls of the two moving blocks are provided with positioning grooves, and positioning blocks matching the positioning grooves are fixedly connected to both sides of the bottom outer wall of the top plate, and the positioning blocks are inserted into the positioning grooves.

[0013] Preferably, an observation groove is formed on the outer wall of the other end of the collection box, and tempered glass is installed in the observation groove.

[0014] Preferably, a rubber pad is installed on the inner wall of the bottom of the storage bed, and a plurality of strip grooves distributed at equal distances are opened on the outer wall of one end of the protective shell.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] In the utility model, the fixing mechanism is provided so that the top plate and the push plate can be quickly disassembled from the moving block, which is beneficial for subsequent maintenance or cleaning of the push plate by the staff. At the same time, no external tools are required for disassembly, which is beneficial for use. Furthermore, the first one-way threaded rod is provided on the outside of the storage bed, so that the screen scraps will not fall on the first one-way threaded rod when they fall, and thus will not affect the top plate driving the push plate to push the scraps and scraps, thereby not affecting the collection of the screen scraps, which is beneficial for use.

[0017] In the utility model, the positioning groove and the positioning block are provided to play a positioning role, which is convenient for the staff to install the top plate. The tempered glass is provided to facilitate the staff to directly observe the amount of screen scraps inside the collection box without taking out the collection box. The rubber pad is provided to play a buffering role to prevent the screen scraps from falling on the storage bed and causing secondary breakage and splashing onto the staff. The multiple strip grooves are provided to facilitate the heat dissipation of the second drive motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an auxiliary mechanism for collecting screens.

[0019] Figure 2 The figure is a schematic diagram of the structure of a collection box of an auxiliary mechanism for collecting screens.

[0020] Figure 3 The figure is a schematic diagram of the main gear structure of an auxiliary mechanism for collecting screens.

[0021] Figure 4 It is a schematic diagram of the third one-way threaded rod structure of an auxiliary mechanism for collecting screens.

[0022] Figure 5 The figure is a schematic diagram of the side groove structure of an auxiliary mechanism for collecting screens.

[0023] Figure 6The figure is a schematic diagram of a strip groove structure of an auxiliary mechanism for collecting screens.

[0024] Figure 7 The present invention is a schematic diagram of the positioning block structure of an auxiliary mechanism for collecting screens.

[0025] In the figure: 1. collection seat; 2. control panel; 3. mounting plate; 4. first one-way threaded rod; 5. storage bed; 6. moving block; 7. protective shell; 8. top plate; 9. rubber pad; 10. push plate; 11. locking cap; 12. collection box; 13. placement plate; 14. first drive motor; 15. tempered glass; 16. second one-way threaded rod; 17. positioning groove; 18. main gear; 19. toothed belt; 20. sub-gear; 21. third one-way threaded rod; 22. side groove; 23. strip groove; 24. second drive motor; 25. positioning block. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example 1

[0028] See also Figure 1-Figure 7 In the embodiment of the utility model, an auxiliary mechanism for collecting screens comprises a collecting seat 1 and a storage bed 5 fixedly connected to the top of the outer wall at one end of the collecting seat 1, a collecting box 12 is arranged at the bottom of the other end of the collecting seat 1, and side grooves 22 are arranged on the outer walls on both sides of the collecting box 12, a control panel 2 is installed on the outer wall of one side of the collecting seat 1, a battery is arranged inside the collecting seat 1, and the battery is electrically connected to the control panel 2, and transverse grooves are arranged on the outer walls on both sides of the storing bed 5, and a first one-way threaded rod 4 is rotatably connected between the inner wall at one end of the transverse groove and the outer wall at one end of the collecting seat 1 through a bearing, and a moving block 6 is rotatably sleeved on one end of the circumferential outer wall of the first one-way threaded rod 4 through a thread, and a top plate 8 is arranged on the top outer wall of the moving block 6, and a push plate 10 is fixedly connected to the bottom outer wall of the top plate 8, and a fixing mechanism is arranged on the top of the moving block 6 for facilitating quick disassembly and assembly of the top plate 8 from the moving block 6;

[0029] The bottom of the outer walls of both sides of the storage bed 5 are fixedly connected with mounting plates 3, and the top outer walls of the mounting plates 3 are opened with multiple mounting holes distributed at equal distances. One end of the storage bed 5 is provided with a driving mechanism for rotating the two first one-way threaded rods 4, and the collecting seat 1 is provided with a moving mechanism for taking out the collecting box 12. When the device needs to be used, the staff will place the storage bed 5 on the top of the workbench, and then fit one side of the collecting seat 1 with one side of the workbench so that the storage bed 5 is located at the bottom of the processing tool, and then use fixing bolts to cooperate with the mounting holes on the mounting plate 3 to fix the position of the entire device. When the screen is processed, the debris and scraps generated will fall into the storage bed 5, and the staff will control the control panel 2 to start the driving mechanism, which will drive the two first one-way threaded rods 4 to rotate, thereby driving the moving blocks 6 on the two first one-way threaded rods 4 to move, and then driving the top plate 8 and the push plate 10 to move. The fallen materials can be taken out by moving the push plate 10. The scraps in the storage bed 5 are pushed into the collecting seat 1, and then fall into the collecting box 12 through the collecting seat 1. The screen scraps can be collected through the collecting box 12. When the collecting box 12 needs to be taken out, the staff controls the control panel 2 to start the moving mechanism, pushes out the collecting box 12, and then the staff takes the side grooves 22 on both sides of the collecting box 12 to remove the collecting box 12. After removal, the debris and scraps in the collecting box 12 can be taken out. Through the set fixing mechanism, the top plate 8 and the push plate 10 can be easily and quickly disassembled from the moving block 6, which is beneficial for subsequent staff to maintain or clean the push plate 10. At the same time, no external tools are required during disassembly, which is beneficial to use. The first one-way threaded rod 4 is set on the outside of the storage bed 5, so that the screen scraps will not fall on the first one-way threaded rod 4 when they fall, and will not affect the top plate 8 driving the push plate 10 to push the debris and scraps, thereby not affecting the collection of the screen scraps, which is beneficial to use.

[0030] The fixing mechanism includes two second one-way threaded rods 16, which are respectively fixedly connected to the top outer walls of the two moving blocks 6. Circular grooves are provided on both sides of the top outer wall of the top plate 8. The second one-way threaded rods 16 are inserted into the circular grooves, and the top of the circumferential outer wall of the second one-way threaded rods 16 is sleeved with locking caps 11 through threaded rotation. When the push plate 10 needs to be maintained or cleaned, the staff rotates the two locking caps 11 so that the two locking caps 11 fall off the second one-way threaded rods 16, and then takes the top plate 8 to remove the top plate. The plate 8 and the push plate 10 are removed, which makes it convenient for the staff to maintain or clean the push plate 10. When the top plate 8 and the push plate 10 need to be reset, the staff takes the top plate 8, and then inserts the second one-way threaded rod 16 on the moving block 6 into the circular groove on the top plate 8, and then rotates and sleeves the two locking caps 11 on the second one-way threaded rod 16 until the bottom outer wall of the locking cap 11 fits with the top outer wall of the top plate 8, and the reset installation can be completed. The installation and disassembly are fast and simple. At the same time, the disassembly and installation process does not require the help of external tools, which is convenient for use.

[0031] The driving mechanism includes a protective shell 7, which is installed on the outer wall of one end of the collecting seat 1. The outer walls of one end of the storage bed 5 are respectively connected to the main gear 18 and the auxiliary gear 20 through bearings. A toothed belt 19 is provided at one end of the storage bed 5, and the main gear 18 and the auxiliary gear 20 are meshed with the toothed belt 19. The outer walls of one end of the two first one-way threaded rods 4 are respectively fixedly connected to the outer walls of the other ends of the main gear 18 and the auxiliary gear 20. A second driving motor 24 is installed on the inner wall of one end of the protective shell 7. The battery and the control panel 2 are connected to the storage bed 5. The second drive motor 24 is electrically connected, and one end of the output shaft of the second drive motor 24 is fixedly connected to the outer wall of one end of the main gear 18. When the drive mechanism needs to be used, the staff controls the control panel 2 to start the second drive motor 24. The start of the second drive motor 24 drives the main gear 18 to rotate, and then drives the sub-gear 20 to rotate through the toothed belt 19. The rotation of the main gear 18 and the sub-gear 20 can drive the two first unidirectional threaded rods 4 to rotate, which is conducive to making the movement of the top plate 8 and the push plate 10 more stable.

[0032] Among them, the moving mechanism includes a first drive motor 14, and the battery and the control panel 2 are all connected to the first drive motor 14. The first drive motor 14 is installed at the bottom of the outer wall of the other end of the collecting seat 1. The bottom inner wall of the collecting seat 1 is provided with a bottom groove. The inner walls at both ends of the bottom groove are rotatably connected with a third one-way threaded rod 21 through a bearing. The other end of the circumferential outer wall of the third one-way threaded rod 21 is rotatably sleeved with a placing plate 13 through a thread. The collection box 12 is placed on the top of the placing plate 13, and one end of the output shaft of the first drive motor 14 is fixedly connected to the outer wall of the other end of the third one-way threaded rod 21. When the moving mechanism needs to be used, the staff controls the control panel 2 to start the first drive motor 14. By starting the first drive motor 14, the third one-way threaded rod 21 is driven to rotate, thereby moving the placing plate 13. The movement of the placing plate 13 drives the collection box 12 on the top of the placing plate 13 to move, and then the collection box 12 can be pushed out, which is convenient for the staff to take the collection box 12.

[0033] Among them, the top outer walls of the two moving blocks 6 are each provided with a positioning groove 17, and both sides of the bottom outer wall of the top plate 8 are fixedly connected with positioning blocks 25 that are compatible with the positioning groove 17, and the positioning blocks 25 are all inserted into the positioning groove 17. The positioning groove 17 and the positioning blocks 25 are set to play a positioning role, which is convenient for the staff to install the top plate 8. When installing the top plate 8, the staff can insert the positioning blocks 25 on the top plate 8 into the positioning groove 17 on the moving block 6, which can limit the top plate 8, and is convenient for the staff to install the locking cap 11 on the second unidirectional threaded rod 16.

[0034] Among them, an observation groove is opened on the outer wall of the other end of the collection box 12, and a tempered glass 15 is installed in the observation groove. Through the set tempered glass 15, the staff can directly observe the amount of screen scraps inside the collection box 12 without taking out the collection box 12.

[0035] Among them, a rubber pad 9 is installed on the inner wall of the bottom of the storage bed 5, and a plurality of equally spaced strip grooves 23 are opened on the outer wall of one end of the protective shell 7. The rubber pad 9 can play a buffering role to prevent screen scraps from falling on the storage bed 5 and causing secondary breakage and splashing onto the staff. The plurality of strip grooves 23 can facilitate the heat dissipation of the second drive motor 24.

[0036] The working principle of the utility model is as follows: the staff places the storage bed 5 on the top of the workbench, and then fits one side of the collecting seat 1 with one side of the workbench so that the storage bed 5 is located at the bottom of the processing tool, and then uses the fixing bolts to cooperate with the mounting holes on the mounting plate 3 to fix the position of the entire device. When the screen is processed, the generated debris and scraps will fall into the rubber pad 9 on the storage bed 5. The staff controls the control panel 2 to start the second drive motor 24, which drives the two first unidirectional threaded rods 4 to rotate, and drives the top plate 8 and the push plate 10 to move. Through the movement of the push plate 10, the scraps dropped in the storage bed 5 can be pushed into the collecting seat 1, and then dropped into the collecting box 12 through the collecting seat 1. Through the collecting box 12, the screen scraps can be collected, and the amount of screen scraps inside the collecting box 12 can be observed through the tempered glass 15. When the amount of scraps in the collecting box 12 is too much and the collecting box 12 needs to be taken out, the staff controls the control panel The plate 2 starts the first drive motor 14, driving the placement plate 13 and the collection box 12 on the top of the placement plate 13 to move. When the side grooves 22 on both sides of the collection box 12 leak out, the staff can take the side grooves 22 on both sides of the collection box 12 to remove the collection box 12. After removal, the debris and scraps in the collection box 12 can be taken out. When the push plate 10 needs to be maintained or cleaned, the staff rotates the two locking caps 11 so that the two locking caps 11 are both off the second one-way threaded rod 16. When the top plate 8 and the push plate 10 need to be reset, the staff takes the top plate 8, inserts the positioning block 25 on the top plate 8 into the positioning groove 17 on the moving block 6, and then rotates the two locking caps 11 to be sleeved on the second one-way threaded rod 16 until the bottom outer wall of the locking cap 11 is in contact with the top outer wall of the top plate 8, and the reset installation is completed.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention.

Claims

1. An auxiliary mechanism for collecting screens, comprising a collecting seat (1) and a storage bed (5) fixedly connected to the top of an outer wall of one end of the collecting seat (1), Features: A collecting box (12) is provided at the bottom of the other end of the collecting seat (1), and side grooves (22) are provided on both side outer walls of the collecting box (12); a control panel (2) is installed on one side outer wall of the collecting seat (1); a storage battery is provided inside the collecting seat (1), and the storage battery is electrically connected to the control panel (2); transverse grooves are provided on both side outer walls of the storage bed (5); a first one-way threaded rod (4) is rotatably connected between the inner wall of one end of the transverse groove and the outer wall of one end of the collecting seat (1) through a bearing; a moving block (6) is rotatably sleeved on one end of the circumferential outer wall of the first one-way threaded rod (4) through a thread; a top plate (8) is provided on the top outer wall of the moving block (6); a push plate (10) is fixedly connected to the bottom outer wall of the top plate (8), and a fixing mechanism is provided on the top of the moving block (6) for facilitating quick disassembly and assembly of the top plate (8) from the moving block (6); The bottom of the outer walls on both sides of the storage bed (5) are fixedly connected to a mounting plate (3), and the top outer wall of the mounting plate (3) is provided with a plurality of mounting holes distributed at equal distances. A driving mechanism for rotating the two first one-way threaded rods (4) is provided at one end of the storage bed (5), and a moving mechanism for taking out the collection box (12) is provided in the collection seat (1).

2. An auxiliary mechanism for collecting screens according to claim 1, Features: The fixing mechanism comprises two second one-way threaded rods (16), which are respectively fixedly connected to the top outer walls of the two moving blocks (6), and circular grooves are provided on both sides of the top outer wall of the top plate (8), and the second one-way threaded rods (16) are inserted into the circular grooves, and the top of the circumferential outer wall of the second one-way threaded rod (16) is sleeved with a locking cap (11) through a threaded rotation.

3. An auxiliary mechanism for collecting screens according to any one of claims 1-2, Features: The driving mechanism comprises a protective shell (7), which is mounted on the outer wall of one end of the collecting seat (1); the outer wall of one end of the storage bed (5) is rotatably connected to a main gear (18) and a sub-gear (20) via bearings on both sides; a toothed belt (19) is provided at one end of the storage bed (5), and the main gear (18) and the sub-gear (20) are both meshed with the toothed belt (19); the outer walls of one end of the two first one-way threaded rods (4) are respectively fixedly connected to the outer walls of the other ends of the main gear (18) and the sub-gear (20); a second driving motor (24) is mounted on the inner wall of one end of the protective shell (7); the battery and the control panel (2) are both electrically connected to the second driving motor (24); and one end of the output shaft of the second driving motor (24) is fixedly connected to the outer wall of one end of the main gear (18).

4. An auxiliary mechanism for collecting screens according to claim 3, Features: The moving mechanism comprises a first drive motor (14), a battery and a control panel (2) are connected to the first drive motor (14), the first drive motor (14) is installed at the bottom of the outer wall of the other end of the collecting seat (1), the bottom inner wall of the collecting seat (1) is provided with a bottom groove, a third one-way threaded rod (21) is rotatably connected between the inner walls at both ends of the bottom groove through bearings, the other end of the circumferential outer wall of the third one-way threaded rod (21) is rotatably sleeved with a placement plate (13) through a thread, the collecting box (12) is placed on the top of the placement plate (13), and one end of the output shaft of the first drive motor (14) is fixedly connected to the outer wall of the other end of the third one-way threaded rod (21).

5. An auxiliary mechanism for collecting screens according to claim 4, Features: The top outer walls of the two moving blocks (6) are both provided with positioning grooves (17), and positioning blocks (25) adapted to the positioning grooves (17) are fixedly connected to both sides of the bottom outer wall of the top plate (8), and the positioning blocks (25) are inserted into the positioning grooves (17).

6. An auxiliary mechanism for collecting screens according to claim 1, Features: An observation slot is formed on the outer wall of the other end of the collection box (12), and a tempered glass (15) is installed in the observation slot.

7. An auxiliary mechanism for collecting screens according to claim 3, Features: A rubber pad (9) is installed on the inner wall of the bottom of the storage bed (5), and a plurality of strip grooves (23) distributed at equal distances are opened on the outer wall of one end of the protective shell (7).