Wall-mounted projection mounting structure convenient to disassemble and assemble
The lifting mechanism of the traction line and the winding wheel solves the problem of difficult disassembly of the wall-mounted projection screen at high places, realizes safe and efficient disassembly and assembly at low places, and improves maintenance efficiency and safety.
Patent Information
- Application Number
- CN202422178625.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-09-05
AI Technical Summary
Existing wall-mounted projection screens require high-altitude operations when disassembling or replacing the screen, which poses a safety hazard and is inconvenient to operate, reducing installation and disassembly efficiency.
The traction mechanism and the lifting projection mechanism are adopted. The projection shell is lifted and lowered by the traction line and the winding wheel. Combined with the drive sprocket and the hand wheel, the screen can be replaced and maintained at a low place, avoiding high-altitude operations.
It improves maintenance safety and operational efficiency, simplifies the disassembly and assembly process of the projection screen, and reduces the risk of working at height.
Smart Images
Figure CN223486351U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of projection equipment installation technology, specifically a wall-mounted projection installation structure that is easy to assemble and disassemble. Background Technology
[0002] In teaching, to improve teaching effectiveness, projection equipment is often used to display teaching materials so that students can better understand the content. Wall-mounted projectors are a commonly used type of projection equipment. Wall-mounted projection screens are typically installed high on a wall or ceiling, and projection is done by pulling the screen down. However, disassembling or replacing the screen requires workers to climb stairs to a high position. Prolonged work at heights carries a high risk, and installing or disassembling on stairs is inconvenient, reducing efficiency. Utility Model Content
[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a wall-mounted projection installation structure that is easy to assemble and disassemble, thereby solving the shortcomings of the prior art.
[0004] The purpose of this utility model is achieved through the following technical solution: a wall-mounted projection installation structure that is easy to assemble and disassemble, including a traction mechanism and a lifting projection mechanism. The traction mechanism includes a mounting base and a traction shaft. Two mounting bases are fixedly fixed at intervals along the horizontal direction. The traction shaft is disposed between the two mounting bases. The end of the traction shaft is rotatably connected to the mounting base. Two winding wheels are mounted on the traction shaft, and traction lines are wound on the winding wheels. The lifting projection mechanism includes a projection housing, a scroll, and a projection screen. Traction blocks are fixed at both ends of the projection housing. The traction lines on the two winding wheels are respectively connected to the two traction blocks. The scroll is rotatably disposed inside the projection housing, and the projection screen is wound on the scroll. A window is opened at the bottom of the projection housing for the projection screen to pass through.
[0005] Furthermore, a strip-shaped drive housing is connected to the bottom of one of the mounting bases. A transmission cavity is provided inside the mounting base, and a drive cavity is provided inside the strip-shaped drive housing. The drive cavity communicates with the transmission cavity. A first sprocket is provided inside the transmission cavity. The first sprocket is mounted on the traction shaft. A drive shaft is rotatably mounted inside the drive cavity. A second sprocket is mounted on the drive shaft. The second sprocket is connected to the first sprocket via a chain drive. One end of the drive shaft extends out of the strip-shaped drive housing and is connected to a handwheel.
[0006] Furthermore, a limiting rod is slidably passed through the strip-shaped drive housing, the limiting rod having the degree of freedom to move axially along the drive shaft, and the limiting rod is inserted into the tooth groove of the second sprocket.
[0007] Furthermore, a pull plate is provided on the outer side of the strip-shaped drive housing, one end of the limiting rod is fixedly connected to the pull plate, and a spring is provided between the pull plate and the strip-shaped drive housing, the spring being sleeved on the limiting rod.
[0008] Furthermore, a locking ring is coaxially fixed to one end of the winding wheel, and both the locking ring and the winding wheel are slidably sleeved on the traction shaft. A locking bolt is threadedly connected to the side wall of the locking ring, and the locking bolt abuts against the traction shaft.
[0009] Furthermore, a limiting strip is fixed to the top of the projection housing, and a limiting groove is formed on the top of the limiting strip along the axial direction of the traction shaft. The cross-sectional shape of the limiting groove is V-shaped.
[0010] Furthermore, a motor is installed on the top of the projection housing, the motor is located on one side of the limiting strip, the output shaft of the motor is connected to a first gear, a second gear is mounted on the scroll, and a drive window is opened on the top of the projection housing, through which the first gear passes and meshes with the second gear.
[0011] Furthermore, a lifting ring is fixed to the top of the traction block, and the traction line is wound around the lifting ring.
[0012] The beneficial effects of this utility model are:
[0013] The projection housing is suspended and installed using a traction cable. By rotating the traction shaft, the winding wheel is driven to rewind or lower the traction cable, thereby completing the raising and lowering of the projection housing. This eliminates the need for working at heights during subsequent maintenance, replacement, and cleaning of the projection screen, improving the safety of later maintenance. Furthermore, the later maintenance operations are simple and quick, improving the efficiency of later maintenance. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of a wall-mounted projection installation structure that is easy to assemble and disassemble according to the present invention.
[0015] Figure 2 This is a schematic diagram of the internal structure of the strip-shaped drive housing in a wall-mounted projection installation structure that is easy to assemble and disassemble according to this utility model.
[0016] Figure 3 This is a schematic diagram of the internal structure of the projection housing in a wall-mounted projection installation structure that is easy to assemble and disassemble according to this utility model.
[0017] Figure 4This is a side view of the limiting strip in a wall-mounted projection installation structure that is easy to assemble and disassemble according to this utility model;
[0018] In the diagram, 1-mounting base, 2-traction shaft, 3-projection housing, 4-scroll, 5-projection screen, 6-winding wheel, 7-traction line, 8-traction block, 9-strip drive housing, 10-transmission cavity, 11-drive cavity, 12-first sprocket, 13-second sprocket, 14-chain, 15-drive shaft, 16-handwheel, 17-limiting rod, 18-pull plate, 19-spring, 20-locking ring, 21-locking bolt, 22-limiting strip, 23-limiting groove, 24-first gear, 25-second gear, 26-drive window, 27-motor. Detailed Implementation
[0019] Example 1
[0020] like Figures 1 to 4As shown, a wall-mounted projection installation structure that is easy to assemble and disassemble includes a traction mechanism and a lifting projection mechanism. The traction mechanism includes a mounting base 1 and a traction shaft 2. Two mounting bases 1 are fixedly fixed at intervals along the horizontal direction. The traction shaft 2 is located between the two mounting bases 1. The end of the traction shaft 2 is rotatably connected to the mounting base 1. Two winding wheels 6 are mounted on the traction shaft 2, and traction wires 7 are wound on the winding wheels 6. The lifting projection mechanism includes a projection housing 3, a roller 4, and a projection screen 5. Traction blocks 8 are fixed to both ends of the projection housing 3. The traction wires 7 on the two winding wheels 6 are respectively connected to... Two traction blocks 8 are provided. A scroll 4 is rotatably mounted inside the projection housing 3, and the projection screen 5 is wound around the scroll 4. A window is provided at the bottom of the projection housing 3 for the projection screen 5 to pass through. A strip-shaped drive housing 9 is connected to the bottom of a mounting base 1. A transmission cavity 10 is provided inside the mounting base 1. A drive cavity 11 is provided inside the strip-shaped drive housing 9. The drive cavity 11 is connected to the transmission cavity 10. A first sprocket 12 is provided inside the transmission cavity 10. The first sprocket 12 is mounted on the traction shaft 2. A drive shaft 15 is rotatably mounted inside the drive cavity 11. A second sprocket 13 is mounted on the drive shaft 15. The second sprocket 13 is connected to the first sprocket 12 via a chain 14. One end of the drive shaft 15 extends through the strip-shaped drive housing 9 and is connected to a handwheel 16. The mounting base 1 is bolted to the wall or ceiling. The strip-shaped drive housing 9 allows workers to easily drive the traction shaft 2 at a low position. When maintenance of the lifting projection mechanism is required, turning the handwheel 16 rotates the drive shaft 15, which in turn rotates the second sprocket 13. The second sprocket 13 then drives the first sprocket 12 via the chain 14, which in turn drives the traction shaft 2. The winding wheel 6 rotates, causing the traction cable 7 to be lowered. This allows the projection housing 3 to move downwards under its own weight, reducing its height. This allows staff to perform operations such as replacing and cleaning the projection housing 5 from a lower position, improving safety during later maintenance. Secondly, it facilitates operation and improves maintenance efficiency. After maintenance is completed, the handwheel 16 is reversed, causing the traction shaft 2 to reverse and wind the traction cable 7, moving the projection housing 3 upwards to reset it. The roller 4 inside the projection screen 5 rotates to wind and lower the projection screen 5, allowing the projection screen 5 to be unfolded for use or stored.
[0021] Example 2
[0022] like Figure 1 As shown, based on Embodiment 1, a lifting ring is fixed to the top of the traction block 8, and the traction line 7 is wound around the lifting ring. The lifting projection mechanism can be removed by untying the traction line 7, which is simple and quick to operate.
[0023] Example 3
[0024] Based on Example 2, such as Figure 1 and Figure 2As shown, a limiting rod 17 is slidably mounted on the strip-shaped drive housing 9. The limiting rod 17 has the freedom to move axially along the drive shaft 15. The limiting rod 17 is inserted into the tooth groove of the second sprocket 13. A pull plate 18 is provided on the outer side of the strip-shaped drive housing 9. One end of the limiting rod 17 is fixedly connected to the pull plate 18. A spring 19 is provided between the pull plate 18 and the strip-shaped drive housing 9. The spring 19 is sleeved on the limiting rod 17. When it is necessary to rotate the traction shaft 2, the limiting rod 17 is manually pulled away from the second sprocket 13, so that the spring 19 is stretched and the limiting rod 17 is pulled. The positioning lever 17 disengages from the tooth groove of the second sprocket 13, allowing the second sprocket 13 to rotate smoothly. Then, the other hand rotates the handwheel 16, thereby driving the traction shaft 2 to rotate via the chain. After adjustment, the pull plate 18 is released, allowing the limiting lever 17 to reset under the reaction force of the spring 19. In actual operation, the handwheel 16 can be slightly rotated to allow the limiting lever 17 to smoothly insert into the tooth groove of the second sprocket 13, thereby restricting the rotational freedom of the second sprocket 13 and locking the traction shaft 2, thus maintaining the stability of the lifting projection mechanism.
[0025] Example 4
[0026] Based on Example 3, such as Figure 1 As shown, a locking ring 20 is coaxially fixed to one end of the winding wheel 6. Both the locking ring 20 and the winding wheel 6 are slidably sleeved on the traction shaft 2. A locking bolt 21 is threadedly connected to the side wall of the locking ring 20. The locking bolt 21 abuts against the traction shaft 2. The position of the winding wheel 6 on the traction shaft 2 is adjustable, which can adjust the distance between the two winding wheels 6, thereby meeting the installation requirements of projection screens 5 of various sizes and having a wide range of applications.
[0027] Example 5
[0028] Based on Example 4, such as Figure 1 , Figure 3 and Figure 4As shown, a limit strip 22 is fixed to the top of the projection housing 3. A limit groove 23 is formed on the top of the limit strip 22 along the axial direction of the traction shaft 2. The cross-sectional shape of the limit groove 23 is V-shaped. A motor 27 is installed on the top of the projection housing 3. The motor 27 is located on one side of the limit strip 22. The output shaft of the motor 27 is connected to a first gear 24. A second gear 25 is mounted on the scroll 4. A drive window 26 is opened on the top of the projection housing 3. The first gear 24 passes through the drive window 26 and meshes with the second gear 25. Since the lifting projection mechanism is installed by suspension... The installation of the projection screen can cause the lifting mechanism to sway under external forces. To address this, a limiting strip 22 is installed. When the projection housing 3 is raised or lowered to its designated position, the traction shaft 2 is located within the limiting groove 23, thus limiting the swaying of the projection housing 3 and ensuring its stability. Furthermore, the limiting groove 23 has a wider top and narrower bottom structure, facilitating the entry of the traction shaft 2 into the limiting groove 23. The motor 27 is installed on one side of the limiting strip 22 to prevent interference. The motor 27 drives the roller 4 to rotate through the meshing of the first gear 24 and the second gear 25, realizing the lowering and rewinding of the projection screen. In practice, the motor simply follows the up-and-down movement of the projection housing and has no rotational freedom, thus avoiding tangling issues. Therefore, no winding design is required. As long as the length of the motor's wire arrangement meets the lifting height of the projection housing, it will not affect the normal use of the projection housing or the height adjustment of the projection housing.
Claims
1. A wall-mounted projector installation structure that is easy to assemble and disassemble, characterized in that, The system includes a traction mechanism and a lifting projection mechanism. The traction mechanism includes a mounting base (1) and a traction shaft (2). Two mounting bases (1) are fixed at intervals along the horizontal direction. The traction shaft (2) is located between the two mounting bases (1). The end of the traction shaft (2) is rotatably connected to the mounting base (1). Two winding wheels (6) are mounted on the traction shaft (2). A traction line (7) is wound on the winding wheels (6). The lifting projection mechanism includes a projection housing (3), a scroll (4), and a projection screen (5). Both ends of the projection housing (3) are fixed with traction blocks (8). The traction lines (7) on the two winding wheels (6) are respectively connected to the two traction blocks (8). The scroll (4) is rotatably arranged inside the projection housing (3). The projection screen (5) is wound on the scroll (4). A window is opened at the bottom of the projection housing (3) for the projection screen (5) to pass through.
2. The wall-mounted projection installation structure for easy assembly and disassembly according to claim 1, characterized in that, One of the mounting bases (1) has a strip-shaped drive housing (9) connected to its bottom. The mounting base (1) has a transmission cavity (10) and the strip-shaped drive housing (9) has a drive cavity (11). The drive cavity (11) is connected to the transmission cavity (10). The transmission cavity (10) has a first sprocket (12) and the first sprocket (12) is mounted on the traction shaft (2). The drive cavity (11) has a drive shaft (15) rotatably mounted on the drive shaft (15). The drive shaft (15) has a second sprocket (13) mounted on it. The second sprocket (13) is connected to the first sprocket (12) via a chain (14). One end of the drive shaft (15) extends out of the strip-shaped drive housing (9) and is connected to a handwheel (16).
3. The wall-mounted projection installation structure for easy assembly and disassembly according to claim 2, characterized in that, A limiting rod (17) is slidably passed through the strip-shaped drive housing (9). The limiting rod (17) has the freedom to move axially along the drive shaft (15). The limiting rod (17) is inserted into the tooth groove of the second sprocket (13).
4. The wall-mounted projection installation structure for easy assembly and disassembly according to claim 3, characterized in that, A pull plate (18) is provided on the outside of the strip-shaped drive housing (9). One end of the limiting rod (17) is fixedly connected to the pull plate (18). A spring (19) is provided between the pull plate (18) and the strip-shaped drive housing (9). The spring (19) is sleeved on the limiting rod (17).
5. The wall-mounted projection installation structure for easy assembly and disassembly according to claim 1, characterized in that, One end of the winding wheel (6) is coaxially fixed with a locking ring (20). The locking ring (20) and the winding wheel (6) are both slidably sleeved on the traction shaft (2). The side wall of the locking ring (20) is threaded with a locking bolt (21), which abuts against the traction shaft (2).
6. The wall-mounted projection installation structure for easy assembly and disassembly according to claim 1, characterized in that, A limiting strip (22) is fixed to the top of the projection housing (3), and a limiting groove (23) is opened on the top of the limiting strip (22) along the axial direction of the traction shaft (2), and the cross-sectional shape of the limiting groove (23) is V-shaped.
7. The wall-mounted projection installation structure for easy assembly and disassembly according to claim 6, characterized in that, A motor (27) is installed on the top of the projection housing (3). The motor (27) is located on one side of the limiting strip (22). The output shaft of the motor (27) is connected to a first gear (24). A second gear (25) is fitted on the scroll (4). A drive window (26) is opened on the top of the projection housing (3). The first gear (24) passes through the drive window (26) and meshes with the second gear (25).
8. The wall-mounted projection installation structure for easy assembly and disassembly according to claim 1, characterized in that, The top of the traction block (8) is fixed with a lifting ring, and the traction line (7) is wound around the lifting ring.