Campus bulletin board

Abstract

The invention relates to the technical field of bulletin boards, in particular to a campus bulletin board which comprises a bulletin board supporting frame, a first fixing frame is fixedly connected to the outer wall of the bulletin board supporting frame, and a first electric telescopic rod is fixedly installed on the outer wall of the first fixing frame. The output end of the first electric telescopic rod is fixedly connected with a first moving plate, the outer wall of the first moving plate is fixedly connected with two second fixing plates, and the device has the beneficial effects that when the second electric telescopic rod continues to be started, a scraping knife abuts against the corresponding bulletin board at an inclined angle; in the process that the two scraping knives are close to each other, the scraping knives perpendicularly abut against the surface of the bulletin board for scraping, and when the two scraping knives are converted into a synchronous clockwise rotating scraping state from a horizontal close scraping state, the angle between the scraping knives and the bulletin board is reduced, and the scraping knives abut against the surface of the bulletin board at a smaller angle for scraping offset printing. And offset printing can be scraped more uniformly through small-angle collision.

Description

Technical Field

[0001] The present invention relates to the technical field of bulletin boards, in particular to a campus bulletin board. Background Art

[0002] Bulletin boards are an effective means for organizations or corporate units to conduct self-promotion. They are often used in public places such as streets, factories, and hotels. The glass panels can be opened to replace promotional posters or notices. With the continuous innovation and development of bulletin boards, they now use more digital broadcasting services, using digital voice broadcasters to broadcast more information when tourists read the paper posters in the bulletin boards. They are used in tourism, sports exhibitions and other fields.

[0003] The existing digital voice broadcast bulletin boards on the market usually require staff to manually stick posters or notices on the bulletin boards with glue during use. However, when the posters need to be replaced, tearing off the discarded posters usually leaves glue marks on the bulletin boards. If these glue marks are not removed in time, it is easy to cause the subsequent posters to be pasted unevenly. Therefore, a bulletin board is needed to solve this problem. Summary of the Invention

[0004] The present invention provides a campus bulletin board, which has the beneficial effect of conveniently and maximally removing the influence of offset printing on propaganda posters, and solves the problem mentioned in the above background technology that torn off discarded propaganda posters usually leave offset printing in the bulletin board. If these offset printings are not removed in time, it is easy to cause the subsequent pasted propaganda posters to be uneven after pasting. In order to achieve the above purpose, the present invention provides the following technical solutions: A campus bulletin board includes a bulletin board support frame, the outer wall of the bulletin board support frame is fixedly connected to a first fixed frame body, the outer wall of the first fixed frame body is fixedly installed with a first electric telescopic rod, the output end of the first electric telescopic rod is fixedly connected to a first movable plate, the outer wall of the first movable plate is fixedly connected to two second fixed plates, the outer walls of the two second fixed plates are both installed with a second electric telescopic rod, the output end of the second electric telescopic rod is fixedly connected to the second movable plate, the outer wall of the second movable plate is rotatably connected to a rotating connecting rod, the other end of the rotating connecting rod is rotatably connected to the first rotating rod, one end of the first rotating rod is fixedly connected to a first slider, and the first slider is set as a cylinder.

[0005] Preferably, the outer wall of the first movable plate is provided with a first slide groove and an arc-shaped slide groove, the first slide groove and the arc-shaped slide groove are connected to each other, the first slider is slidably connected to the inner wall of the first slide groove, and the other end of the first rotating rod is rotatably connected to the movable frame.

[0006] Preferably, the outer wall of the first movable plate is provided with a second sliding groove, the inner wall of the second sliding groove is slidably connected to the second slider, the outer wall of the second slider is rotatably connected to the second rotating rod, the other end of the second rotating rod is fixedly connected to the outer wall of the movable frame, the second rotating rod is at the center position of the movable frame, the outer wall of the second rotating rod is sleeved with a first torsion spring, one end of the first torsion spring is fixedly connected to the outer wall of the second slider, and the other end of the first torsion spring is fixedly connected to the outer wall of the movable frame.

[0007] Preferably, a groove is provided on the outer wall of the movable frame, a sliding rod is slidably connected to the inner wall of the movable frame, a fixing plate is fixedly connected to the outer wall of the sliding rod, a reset spring is fixedly connected to the outer wall of the fixing plate, the other end of the reset spring is fixedly connected to the outer wall of the movable frame, and the reset spring is sleeved on the outer wall of the sliding rod.

[0008] Preferably, the inner wall of the groove is rotatably connected to a third rotating rod, the outer wall of the third rotating rod is fixedly connected to a scraper, the outer wall of the third rotating rod is sleeved with a second torsion spring, one end of the second torsion spring is fixedly connected to the groove wall of the groove, and the other end of the second torsion spring is fixedly connected to the outer wall of the scraper.

[0009] Preferably, the arc-shaped chute is set as an arc-shaped track, the inner contour of the second chute matches the outer contour of the second slider, and the outer contour of the first slider matches the inner contour of the first chute.

[0010] Preferably, two glass sliding doors are slidably connected to the inner wall of the first fixed frame, and a digital voice announcer is fixedly installed on the outer wall of the first fixed frame.

[0011] Preferably, the inner wall of the first fixed frame is fixedly connected to the second fixed frame, and the inner wall of the second fixed frame is fixedly installed with a transmission motor.

[0012] Preferably, the output end of the transmission motor is fixedly connected to a first transmission gear, the outer wall of the first transmission gear is meshedly connected to a synchronous toothed belt, and the outer wall of the second fixed frame is rotatably connected to multiple second transmission gears, and the multiple second transmission gears are all meshedly connected to the synchronous toothed belt.

[0013] Preferably, a plurality of notice boards are fixedly connected to the outer wall of the synchronous toothed belt, and a first fixed plate for supporting the synchronous toothed belt is fixedly connected to the outer wall of the second fixed frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In the present invention, when it is necessary to replace the promotional poster, the second electric telescopic rods on both sides are started, which causes the two second movable plates to move closer to each other. The movement of the second movable plates causes the rotating connecting rod, the first rotating rod and the movable frame to move synchronously. The movable frame moves with the corresponding scraper. The two scrapers scrape along the surface of the notice board and approach each other to preliminarily scrape off the offset printing on the surface of the notice board.

[0016] 2. In the present invention, as the second electric telescopic rod continues to start, the trajectories of the arc-shaped slide grooves on both sides are opposite, and the scrapers on both sides rotate synchronously in the clockwise direction, further scraping the offset print from the surface of the notice board that the scrapers are in contact with in a rotary scraping manner, so that a larger area outside the notice board is scraped, and the offset print scraped by the rotary scraping can be scraped outside the outline of the notice board and fall off.

[0017] 3. In the present invention, when the second electric telescopic rod continues to start, the scraper will be at an inclined angle against the corresponding notice board, that is, in the process of the two scrapers approaching each other, the scrapers will vertically contact and scrape the surface of the notice board, and when the two scrapers are converted from scraping horizontally close to each other to scraping synchronously in a clockwise rotation, the angle between the two scrapers and the notice board is reduced, and the offset print is scraped against the surface of the notice board at a smaller angle. The small angle of contact will scrape the offset print on the notice board more evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall side structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the overall front cross-sectional structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the overall top cross-sectional structure of the present invention;

[0022] Figure 5 It is a schematic diagram of a further cross-sectional structure of the present invention;

[0023] Figure 6 For the present invention Figure 5 A schematic diagram of the first movable plate and its surrounding enlarged structure;

[0024] Figure 7 For the present invention Figure 6 A in the middle is an enlarged structural diagram;

[0025] Figure 8 Schematic diagram of the cross-sectional structure of the first movable plate and its surroundings of the present invention;

[0026] Figure 9 For the present invention Figure 8 The enlarged structural diagram at B in the middle;

[0027] Figure 10 It is a partially enlarged structural schematic diagram of the movable frame of the present invention.

[0028] In the accompanying drawings, the list of components represented by each reference numeral is as follows: 1. Bulletin board support frame; 2. First fixed frame; 3. Glass sliding door; 4. Digital voice announcer; 5. Second fixed frame; 6. Transmission motor; 7. First transmission gear; 8. Synchronous toothed belt; 9. Bulletin board; 10. Second transmission gear; 11. First electric telescopic rod; 12. First movable plate; 13. First fixed plate; 14. Second electric telescopic rod; 15. Second fixed plate; 16. Second movable plate; 17. Rotating connecting rod; 18. First slider; 19. First rotating rod; 20. First slide groove; 21. Arc slide groove; 22. Moving frame; 23. Second slide groove; 24. Second slider; 25. Second rotating rod; 26. First torsion spring; 27. Sliding rod; 28. Fixed plate; 29. ​​Return spring; 30. Third rotating rod; 31. Second torsion spring; 32. Scraper; 33. Groove. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1: This example helps solve the problem that when discarded posters are torn off, offset prints are usually left in the billboard. If these offset prints are not removed in time, it is easy to cause the subsequent posters to be uneven after pasting. Figure 1 - Figure 10 A campus bulletin board includes a bulletin board support frame 1, the outer wall of the bulletin board support frame 1 is fixedly connected to a first fixed frame body 2, the outer wall of the first fixed frame body 2 is fixedly installed with a first electric telescopic rod 11, the output end of the first electric telescopic rod 11 is fixedly connected to a first movable plate 12, the outer wall of the first movable plate 12 is fixedly connected to two second fixed plates 15, the outer walls of the two second fixed plates 15 are both installed with a second electric telescopic rod 14, the output end of the second electric telescopic rod 14 is fixedly connected to a second movable plate 16, the outer wall of the second movable plate 16 is rotatably connected to a rotating connecting rod 17, the other end of the rotating connecting rod 17 is rotatably connected to a first rotating rod 19, one end of the first rotating rod 19 is fixedly connected to a first slider 18, and the first slider 18 is set to a cylinder.

[0031] The outer wall of the first movable plate 12 is provided with a first slide groove 20 and an arcuate slide groove 21 , which are connected to each other. The first slider 18 is slidably connected to the inner wall of the first slide groove 20 , and the other end of the first rotating rod 19 is rotatably connected to the movable frame 22 .

[0032] A second sliding groove 23 is provided on the outer wall of the first movable plate 12, and a second slider 24 is slidably connected to the inner wall of the second sliding groove 23. The outer wall of the second slider 24 is rotatably connected to the second rotating rod 25, and the other end of the second rotating rod 25 is fixedly connected to the outer wall of the movable frame 22. The second rotating rod 25 is at the center position of the movable frame 22, and a first torsion spring 26 is sleeved on the outer wall of the second rotating rod 25. One end of the first torsion spring 26 is fixedly connected to the outer wall of the second slider 24, and the other end of the first torsion spring 26 is fixedly connected to the outer wall of the movable frame 22.

[0033] The arc-shaped chute 21 is set as an arc-shaped track, the inner contour of the second chute 23 matches the outer contour of the second slider 24 , and the outer contour of the first slider 18 matches the inner contour of the first chute 20 .

[0034] Two glass sliding doors 3 are slidably connected to the inner wall of the first fixed frame 2 , and a digital voice announcer 4 is fixedly installed on the outer wall of the first fixed frame 2 .

[0035] The second fixed frame 5 is fixedly connected to the inner wall of the first fixed frame 2 , and the transmission motor 6 is fixedly installed on the inner wall of the second fixed frame 5 .

[0036] The output end of the transmission motor 6 is fixedly connected to the first transmission gear 7, the outer wall of the first transmission gear 7 is meshed with a synchronous toothed belt 8, and the outer wall of the second fixed frame 5 is rotatably connected to multiple second transmission gears 10, and the multiple second transmission gears 10 are all meshed with the synchronous toothed belt 8.

[0037] A plurality of notice boards 9 are fixedly connected to the outer wall of the synchronous toothed belt 8 , and a first fixing plate 13 for supporting the synchronous toothed belt 8 is fixedly connected to the outer wall of the second fixing frame 5 .

[0038] In this embodiment: when using the billboard, when it is necessary to paste the promotional posters in the billboard, first slide the glass sliding door 3 to slide the two glass sliding doors 3 together to overlap, exposing multiple notice boards 9, and then use glue to paste the promotional posters on the outer wall of the notice board 9 for promotional display.

[0039] After the promotional posters are pasted, the glass sliding door 3 is slid closed, and then the transmission motor 6 is started. After the transmission motor 6 is started, the first transmission gear 7 at the output end rotates at a constant speed. When the first transmission gear 7 rotates, it drives the synchronous toothed belt 8 to rotate through the meshing relationship. When the synchronous toothed belt 8 rotates, it continuously meshes with multiple second transmission gears 10, causing the synchronous toothed belt 8 to rotate in a cycle along the arrangement direction of the first transmission gear 7 and the multiple second transmission gears 10. The rotation of the synchronous toothed belt 8 drives the multiple notice boards 9 to move continuously, so that the promotional posters pasted on the outer walls of the multiple notice boards 9 can be displayed in a cycle.

[0040] When it is necessary to replace the promotional poster, the poster on the corresponding notice board 9 is first torn off. At this time, offset printing and poster shreds will remain on the notice board 9. At this time, the transmission motor 6 is started to prompt the synchronous toothed belt 8 to move the corresponding notice board 9, so that the notice board 9 that needs to be cleaned moves to a position opposite the first movable plate 12 and stops.

[0041] At this time, the first electric telescopic rod 11 is started, and the first electric telescopic rod 11 moves the first movable plate 12 at the output end toward the direction close to the synchronous toothed belt 8, prompting the two scrapers 32 to contact the surface of the corresponding notice board 9. At this time, the second electric telescopic rods 14 on both sides are started. After the second electric telescopic rods 14 on both sides are started, they respectively move the second movable plate 16 at the output end, prompting the two second movable plates 16 to approach each other. The movement of the second movable plate 16 brings the rotating connecting rod 17, the first rotating rod 19 and the movable frame 22 to move synchronously, and the movable frame 22 moves with the corresponding scraper 32. The two scrapers 32 scrape along the surface of the notice board 9 and approach each other to scrape off the offset printing on the surface of the notice board 9.

[0042] At the same time, as the movable frame 22 moves, the second slider 24 and the first slider 18 slide along the second slide groove 23 and the first slide groove 20 respectively. When the two second sliders 24 move along the second slide groove 23 to the end of the second slide groove 23 and cannot move further, at this time, since the second electric telescopic rod 14 continues to push the second movable plate 16 to move, the second movable plate 16 will continue to move with the rotating connecting rod 17, prompting the first slider 18 of the cylinder to slide from the first slide groove 20 into the arc slide groove 21 of the arc track. In this process, the rotating connecting rod 17 will rotate through the rotating joints at both ends to make adaptive adjustments to prevent it from getting stuck. When the first slider 18 After entering the arc-shaped slide groove 21, the movable frame 22 is forced to rotate along the rotation connection of the second sliding block 24 with the second rotating rod 25. During the rotation, the first torsion spring 26 is twisted to facilitate subsequent reset and reuse. The rotation of the movable frame 22 also causes the corresponding scraper 32 to rotate synchronously. Since the trajectories of the arc-shaped slide grooves 21 on both sides are opposite, the scrapers 32 on both sides rotate synchronously in the clockwise direction at this time, and the surface of the notice board 9 that the scraper 32 contacts is further scraped by a rotational scraping method, so that a larger range outside the notice board 9 is scraped, and the offset printed on the notice board 9 that is scraped off by rotation is scraped out of the outline of the notice board 9 and falls off.

[0043] It should be noted that the pushing force of the second electric telescopic rod 14 is located at the upper center of the movable frame 22, so the movable frame 22 can rotate.

[0044] The digital voice announcer 4 can be used to announce more information when tourists read the paper posters in the publicity column, thereby increasing the publicity effect, and the publicity column support frame 1 can be fixedly installed at the hole position reserved on the ground by screwing the fixing bolts.

[0045] Example 2: This example is an improvement based on Example 1. For details, please refer to Figure 1 - Figure 10 A groove 33 is provided on the outer wall of the movable frame 22, and a sliding rod 27 is slidably connected to the inner wall of the movable frame 22. A fixing plate 28 is fixedly connected to the outer wall of the sliding rod 27, and a return spring 29 is fixedly connected to the outer wall of the fixing plate 28. The other end of the return spring 29 is fixedly connected to the outer wall of the movable frame 22, and the return spring 29 is sleeved on the outer wall of the sliding rod 27.

[0046] The inner wall of the groove 33 is rotatably connected to the third rotating rod 30, the outer wall of the third rotating rod 30 is fixedly connected to the scraper 32, and the outer wall of the third rotating rod 30 is sleeved with a second torsion spring 31, one end of the second torsion spring 31 is fixedly connected to the groove wall of the groove 33, and the other end of the second torsion spring 31 is fixedly connected to the outer wall of the scraper 32.

[0047] In this embodiment, when the two movable frames 22 approach each other, when the second slider 24 moves to the end of the second slide groove 23, the sliding rods 27 protruding from the outer walls of the two movable frames 22 come into contact with each other. The mutual contact of the sliding rods 27 on both sides causes the sliding rods 27 to carry the fixing piece 28 to compress the return spring 29 and slide toward the groove 33. At this time, one end of the sliding rod 27 slides against the side wall of the scraper 32, causing the scraper 32 to rotate clockwise along the rotation connection of the third rotating rod 30 with the third rotating rod 30. During the rotation, the second torsion spring 31 is twisted to facilitate subsequent resetting. At this time, the scraper 32 is at an inclined angle and contacts the corresponding notice board 9, that is, in the process of the two scraper blades 32 approaching each other, the scraper blades 32 vertically contact and scrape the surface of the notice board 9, and when the two scraper blades 32 are converted from horizontally approaching each other to synchronously rotating clockwise scraping, the angle between the two scraper blades 32 and the notice board 9 is reduced, and the offset printing is scraped against the surface of the notice board 9 at a smaller angle. The small angle of contact will more evenly scrape the offset printing on the notice board 9.

[0048] This solves the problem that if the offset printing is not removed in time, it will easily cause the subsequent promotional posters to be uneven after pasting.

[0049] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A campus bulletin board, comprising a bulletin board support frame (1), characterized in that: The outer wall of the propaganda column support frame (1) is fixedly connected to a first fixed frame (2); a first electric telescopic rod (11) is fixedly installed on the outer wall of the first fixed frame (2); an output end of the first electric telescopic rod (11) is fixedly connected to a first movable plate (12); two second fixed plates (15) are fixedly connected to the outer wall of the first movable plate (12); a second electric telescopic rod (14) is installed on the outer wall of each of the two second fixed plates (15); an output end of the second electric telescopic rod (14) is fixedly connected to a second movable plate (16); an outer wall of the second movable plate (16) is rotatably connected to a rotating connecting rod (17); the other end of the rotating connecting rod (17) is rotatably connected to a first rotating rod (19); one end of the first rotating rod (19) is fixedly connected to a first sliding block (18); and the first sliding block (18) is configured as a cylinder.

2. A campus bulletin board according to claim 1, characterized in that: The outer wall of the first movable plate (12) is provided with a first sliding groove (20) and an arc-shaped sliding groove (21), the first sliding groove (20) and the arc-shaped sliding groove (21) are connected to each other, the first sliding block (18) is slidably connected to the inner wall of the first sliding groove (20), and the other end of the first rotating rod (19) is rotatably connected to the movable frame (22).

3. A campus bulletin board according to claim 2, characterized in that: The outer wall of the first movable plate (12) is provided with a second sliding groove (23), the inner wall of the second sliding groove (23) is slidably connected to a second slider (24), the outer wall of the second slider (24) is rotatably connected to a second rotating rod (25), the other end of the second rotating rod (25) is fixedly connected to the outer wall of the movable frame (22), the second rotating rod (25) is located at the center of the movable frame (22), the outer wall of the second rotating rod (25) is sleeved with a first torsion spring (26), one end of the first torsion spring (26) is fixedly connected to the outer wall of the second slider (24), and the other end of the first torsion spring (26) is fixedly connected to the outer wall of the movable frame (22).

4. A campus bulletin board according to claim 3, characterized in that: The outer wall of the movable frame (22) is provided with a groove (33); the inner wall of the movable frame (22) is slidably connected to a sliding rod (27); the outer wall of the sliding rod (27) is fixedly connected to a fixing plate (28); the outer wall of the fixing plate (28) is fixedly connected to a return spring (29); the other end of the return spring (29) is fixedly connected to the outer wall of the movable frame (22); and the return spring (29) is sleeved on the outer wall of the sliding rod (27).

5. A campus bulletin board according to claim 4, characterized in that: The inner wall of the groove (33) is rotatably connected to a third rotating rod (30), the outer wall of the third rotating rod (30) is fixedly connected to a scraper (32), the outer wall of the third rotating rod (30) is sleeved with a second torsion spring (31), one end of the second torsion spring (31) is fixedly connected to the groove wall of the groove (33), and the other end of the second torsion spring (31) is fixedly connected to the outer wall of the scraper (32).

6. A campus bulletin board according to claim 5, characterized in that: The arc-shaped chute (21) is set as an arc-shaped track, the inner contour of the second chute (23) matches the outer contour of the second slider (24), and the outer contour of the first slider (18) matches the inner contour of the first chute (20).

7. A campus bulletin board according to claim 6, characterized in that: Two glass sliding doors (3) are slidably connected to the inner wall of the first fixed frame (2), and a digital voice announcer (4) is fixedly installed on the outer wall of the first fixed frame (2).

8. A campus bulletin board according to claim 7, characterized in that: The inner wall of the first fixed frame (2) is fixedly connected to the second fixed frame (5), and the inner wall of the second fixed frame (5) is fixedly mounted with a transmission motor (6).

9. A campus bulletin board according to claim 8, characterized in that: The output end of the transmission motor (6) is fixedly connected to a first transmission gear (7), the outer wall of the first transmission gear (7) is meshedly connected to a synchronous toothed belt (8), and the outer wall of the second fixed frame (5) is rotatably connected to a plurality of second transmission gears (10), and the plurality of second transmission gears (10) are all meshedly connected to the synchronous toothed belt (8).

10. A campus bulletin board according to claim 9, characterized in that: The outer wall of the synchronous toothed belt (8) is fixedly connected to a plurality of notice boards (9), and the outer wall of the second fixed frame (5) is fixedly connected to a first fixed plate (13) for supporting the synchronous toothed belt (8).

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