A multimedia teaching apparatus

Abstract

The present application relates to the technical field of teaching aids, in particular to a multimedia teaching device. The first writing board is provided with an adsorption assembly for adsorbing dust, and the second writing board is rotatably provided with a cleaning brush, the cleaning brush is provided with a matching part, and a driving assembly connected with the matching part is arranged on the first sliding rail, and the driving assembly drives the cleaning brush to rotate through the matching part. The technical problem that the dust accumulated on the cleaning brush for a long time is not cleaned, resulting in that the dust is not effectively removed during the cleaning process, but is redistributed to other areas of the screen, actually aggravating the pollution of the screen.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of teaching aids, and particularly relates to a multimedia teaching device. BACKGROUND

[0002] The multimedia teaching device is a teaching tool combining traditional blackboard and modern digital display technology. The device usually includes a traditional blackboard that can slide left and right, and a multimedia display screen fixed on the wall or a support. Teachers can push and pull the blackboard as needed, switching between traditional chalk writing and digital content display, providing greater flexibility for classroom teaching.

[0003] In the multimedia teaching device with a push-pull blackboard, chalk dust often adheres to the screen, and long-term accumulation can seriously affect the viewing effect of the screen. Although the existing technology sets a cleaning brush on the blackboard, the cleaning brush will sweep the surface of the screen when the blackboard is pulled, but this method has obvious defects. First, the dust stored in the bristles of the cleaning brush is not cleaned for a long time, which gradually reduces the cleaning effect, and second, because the same part of the bristles is always used for cleaning, this part of the bristles will wear out faster than other parts, resulting in uneven cleaning effect, and the part of the bristles that has accumulated dust will eventually not clean the screen, but redistribute the dust to other areas of the screen. SUMMARY

[0004] The present application aims to provide a multimedia teaching device to solve the technical problem that due to the long-term accumulation of dust in the cleaning brush that is not cleaned, the dust is not effectively removed during the cleaning process, but is redistributed to other areas of the screen, actually exacerbating the pollution of the screen.

[0005] The present application is achieved by the following technical solutions:

[0006] A multimedia teaching device, comprising a first writing board, a second writing board, and a first slide rail fixed at both ends of the first writing board, wherein an adsorption assembly for adsorbing dust is arranged on the first writing board, a cleaning brush is rotatably arranged on the second writing board, a cooperation part is arranged on the cleaning brush, and a driving assembly connected with the cooperation part is arranged on the first slide rail, the driving assembly drives the cleaning brush to rotate through the cooperation part.

[0007] Further, the adsorption assembly comprises a housing arranged on the first writing board, the housing is arranged on the side of the first writing board close to the cleaning brush, the housing is provided with a through hole for the bristles of the cleaning brush to enter, and an electrostatic adsorption material is arranged in the housing.

[0008] Further, a baffle is hingedly connected to the housing, the baffle is used to cover the through hole, and a trigger rod is arranged on the cleaning brush, the length of the trigger rod is less than the length of the bristles of the cleaning brush.

[0009] Further, the electrostatic adsorption material comprises an electrostatic adsorption pad.

[0010] Further, the matching part comprises a rotating rod penetrating through the cleaning brush, both ends of the rotating rod are provided with gears, the gears are located on the first sliding rail, the driving assembly comprises a placing hole formed in the side wall of the first sliding rail, the placing hole is provided with an elastic piece, the elastic piece is connected with a moving block, the moving block is provided with teeth matched with the gears, part of the teeth is located outside the placing hole, and the placing hole is further provided with an adjusting part, when the moving block moves towards the elastic piece, the adjusting part moves the teeth into the placing hole.

[0011] Further, the adjusting part comprises a first inclined surface arranged on the bottom wall of the placing hole, and a second inclined surface arranged on the bottom of the moving block and matched with the first inclined surface, when the moving block moves towards the compression spring, the cooperation between the first inclined surface and the second inclined surface enables the teeth to enter the placing hole.

[0012] Further, the electrostatic adsorption pad is detachably arranged in the shell.

[0013] Further, the dust collecting box is arranged at the bottom of the shell.

[0014] Further, the shell is made of transparent material.

[0015] Further, the elastic piece is a compression spring.

[0016] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0017] 1. By pulling the second writing board, the cleaning brush on the second writing board is in contact with the shell on the first writing board, and the shell is provided with an adsorption material to adsorb the dust on the cleaning brush, thereby solving the problem that the dust accumulated for a long time is not cleaned, resulting in reduced cleaning efficiency.

[0018] 2. The cooperation of the moving block, the elastic piece and the adjusting part realizes automatic flipping of the cleaning brush, and the back-and-forth movement can only flip in the same direction, so that the bristles of each part can clean the screen, without the need for an additional power source or manual operation, thereby improving the cleaning efficiency and convenience.

[0019] 3. The shell is hinged with a baffle, the baffle is used to cover the through hole to prevent the collected dust from escaping or external dust from entering the shell. DETAILED DESCRIPTION

[0020] The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:

[0021] Figure 1A schematic diagram of the structure of the first writing board and the second writing board overlapping each other according to the present invention;

[0022] Figure 2 This is a schematic structural diagram of the second writing board covering the screen of the present invention;

[0023] Figure 3 Schematic diagram of the internal coordination structure of the first writing board and the second writing board of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the cleaning brush and the housing in contact with each other;

[0025] Figure 5 This is a schematic structural diagram of the cleaning brush of the present invention moving toward the housing;

[0026] Figure 6 is a side view of a second writing tablet of the present invention;

[0027] Figure 7 A side view of the placement hole of the present invention;

[0028] Figure 8 It is a top view of the placement hole of the present invention.

[0029] Markings and corresponding parts names in the accompanying drawings:

[0030] 1-first writing board; 2-second writing board; 3-first slide rail; 4-second slide rail; 5-housing; 6-through hole; 7-electrostatic adsorption pad; 8-rotating rod; 9-cleaning brush; 10-gear; 11-placement hole; 12-moving block; 13-teeth; 14-first inclined plane; 15-second inclined plane; 16-compression spring; 17-screen. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0032] Example 1:

[0033] like Figures 1 to 8 As shown, a multimedia teaching device includes a first writing board 1, a second writing board 2, and first slide rails 3 fixedly placed at both ends of the first writing board 1. A suction component for absorbing dust is provided on the first writing board 1. A cleaning brush 9 is rotatably provided on the second writing board 2. A bearing seat can be connected to the second writing board 2. The ends of the cleaning brush 9 are connected to the bearing seat via bearings to achieve free rotation. The cleaning brush 9 is provided with a mating portion, and a drive assembly connected to the mating portion is provided on the first slide rail 3. The drive assembly drives the cleaning brush 9 to rotate via the mating portion.

[0034] The first writing board 1 and the second writing board 2 and the first slide rail 3 in the present application are prior art, the prior art is that a frame body is fixed on a wall, the first writing board 1 is symmetrically and fixedly arranged on the left and right sides of the frame body, and the second writing board 2 is slidably arranged on the frame body, the upper end and the lower end of the frame body are respectively provided with a slide rail system, the slide rail system comprises two parallel first slide rails 3 and second slide rails 4, the two ends of the first writing board 1 are fixedly arranged in the first slide rail 3, and the second writing board 2 is slidably arranged in the second slide rail 4. The push-pull blackboard can be consulted on the network.

[0035] At present, in the multimedia teaching equipment of the push-pull blackboard, chalk dust often adheres to the screen 17, and long-term accumulation will seriously affect the viewing effect of the screen 17. Although the prior art provides the cleaning brush 9 on the blackboard, the cleaning brush 9 will sweep the surface of the screen 17 when the blackboard is pulled, but the dust stored in the bristles of the cleaning brush 9 is not cleaned for a long time, which leads to gradually reduced cleaning effect.

[0036] Therefore, in the present application, the second writing board 2 and the first writing board 1 overlap in most of the area, and the cleaning brush 9 is in contact with the adsorption assembly. When the second writing board 2 needs to be used, the two second writing boards 2 are first pulled relatively to separate the cleaning brush 9 from the adsorption assembly. With the continuous movement of the second writing board 2, the driving assembly provided on the first slide rail 3 starts to drive the cleaning brush 9 to rotate through the matching part, so that the bristles of the cleaning brush 9 on the other side are directed to the side that will enter the screen 17, that is, the bristles of the cleaning brush 9 are reversed before contacting the screen 17, and then the cleaning brush 9 sweeps the surface of the screen 17 to remove most of the dust. After use, the second writing board 2 is pushed back to the original position, at which time the cleaning brush 9 sweeps the screen 17 again for secondary cleaning, effectively removing residual dust. It should be noted that the adsorption assembly is provided on the first writing board 1 to adsorb the dust on the cleaning brush 9 to prevent the dust from recontaminating the screen 17; secondly, the matching part on the cleaning brush 9 is connected with the driving assembly on the first slide rail 3 to rotate the cleaning brush 9 after the cleaning brush 9 completely leaves the adsorption assembly, so as to change the cleaning surface and shake off the dust; thirdly, the cleaning is realized by using the existing push-pull blackboard structure, the cleaning brush 9 sweeps the screen 17 twice during the pushing and pulling process, thereby improving the cleaning effect; finally, the adsorption assembly cooperates with the cleaning brush 9 to adsorb the dust on the cleaning brush 9 when the cleaning brush 9 is in contact with the adsorption assembly. The driving assembly can be an electric motor.

[0037] It should be noted that the adsorption assembly includes a housing 5 arranged on the first writing board 1, the housing 5 is arranged on the side of the first writing board 1 close to the cleaning brush 9, the housing 5 is provided with a through hole 6 for the bristles of the cleaning brush 9 to enter, and the housing 5 is provided with an electrostatic adsorption material. The housing 5 arranged close to the cleaning brush 9 in the application is provided with a through hole 6, which allows the bristles of the cleaning brush 9 to enter the inside. The housing 5 is provided with an electrostatic adsorption material, which uses electrostatic force to adsorb dust particles. When the second writing board 2 is pushed back to the original position, the bristles of the cleaning brush 9 enter the inside of the housing 5 through the through hole 6, and the dust carried on the bristles is attracted and captured by the electrostatic adsorption material. As the use time increases, the electrostatic adsorption material continuously collects the dust brought by the cleaning brush 9, preventing the dust from recontaminating the screen 17. This design effectively collects and stores dust, reducing the possibility of secondary pollution.

[0038] It should be noted that the housing 5 is hinged with a baffle, the baffle is used to cover the through hole 6, and a trigger rod is arranged on the cleaning brush 9, the length of the trigger rod is less than the length of the bristles of the cleaning brush 9.

[0039] In the application, when the cleaning brush 9 does not contact the adsorption assembly, the through hole 6 is closed, preventing the collected dust from escaping or external dust from entering the housing 5. When the cleaning brush 9 approaches, the bristles of the cleaning brush 9 contact the baffle and push the baffle inward. Since the baffle is hinged, the baffle will be opened, allowing the bristles to enter the inside of the housing 5.

[0040] The function of the trigger rod is to drive the baffle to move inward when the bristles are too soft to push the baffle to move. The length of the trigger rod is less than the length of the bristles of the cleaning brush 9. When the bristles of the cleaning brush 9 are directly opposite the screen 17, the part of the trigger rod is also directly opposite the screen 17. Since the trigger rod is smaller than the bristles of the cleaning brush 9, the trigger rod will not contact the screen 17 when the cleaning brush 9 is cleaning the screen 17.

[0041] The electrostatic adsorption pad 7 effectively captures dust particles brought by the cleaning brush 9 using the principle of electrostatic adsorption. Not only does it prevent secondary pollution of dust, but it also improves the durability of cleaning effect; secondly, it has good sealing property, avoiding dust leakage.

[0042] It should be noted that the electrostatic adsorption material includes the electrostatic adsorption pad 7. Chalk dust is usually composed of tiny particles, which will carry an electric charge during the friction process. When the cleaning brush 9 approaches or contacts the electrostatic adsorption pad 7, the electrostatic force will attract the dust particles. The dust particles are transferred from the cleaning brush 9 to the surface of the electrostatic adsorption pad 7 with opposite charges. The dust particles are firmly adsorbed on the surface of the adsorption pad by the electrostatic force, preventing them from being raised again.

[0043] It should be noted that the electrostatic adsorption pad 7 is detachably arranged in the housing 5. The user can easily remove the adsorption pad that is full of dust for cleaning or replacement without disassembling the entire housing 5, which saves maintenance time and ensures the continuity of the adsorption effect.

[0044] It should be noted that a dust box is also included, which is located at the bottom of the housing 5. The dust box at the bottom of the housing 5 provides additional storage space for dust collection. When dust adsorbed by the electrostatic adsorption pad 7 falls off, because the housing 5 is placed vertically and the integrated box is set at the bottom of the housing 5, the dust will fall into the dust box. The dust box can effectively collect this dust and prevent it from being scattered into the teaching environment. This arrangement not only increases the dust collection capacity but also facilitates daily cleaning.

[0045] It should be noted that the housing 5 is made of a transparent material. The user can visually observe the use of the electrostatic adsorption pad 7 and the dust collection box, and promptly determine whether they need to be cleaned or replaced. The cleaning brush 9 can be removed for observation first, and the cleaning brush 9 is also detachable.

[0046] Example 2:

[0047] The mating part includes a rotating rod 8 that passes through the cleaning brush 9, and gears 10 are respectively provided at both ends of the rotating rod 8. The gear 10 is located on the first slide rail 3. The driving assembly includes a placement hole 11 opened on the side wall of the first slide rail 3. An elastic member is provided in the placement hole 11, and the elastic member is connected to a moving block 12. The moving block 12 is provided with teeth 13 that cooperate with the gear 10. A part of the teeth 13 is located outside the placement hole 11. An adjustment part is also provided in the placement hole 11. When the moving block 12 moves toward the elastic member, the adjustment part will move the teeth 13 into the placement hole 11.

[0048] The driving assembly in embodiment 2 is preferably arranged in the placing hole 11 of the first sliding rail 3, and the connection of the moving block 12 and the elastic member enables the moving block 12 to move under the push force, for example, the initial state is that the second writing board 2 and the first writing board 1 are overlapped, and it is mentioned here that the overlap in the prior art has a gap because the two sliding rails are arranged in parallel, so one sliding rail is in front and the other is behind. The second writing board 2 slides away from the first writing board 1 (i.e. moves towards the screen 17), and during the sliding process, before contacting the screen 17, the gear 10 arranged on the second writing board 2 contacts the tooth 13, so the gear 10 meshes with the tooth 13. Since the moving block 12 is connected with the elastic member, and the part of the moving block 12 that is not connected is in abutment with the inner wall of the placing hole 11, the second writing board 2 slides away from the first writing board 1, and after the gear 10 meshes with the tooth 13, the moving block 12 cannot move, the tooth 13 does not move, and the gear 10 itself is flipped, thereby flipping the cleaning brush 9. Then the flipped cleaning brush 9 continues to move towards the screen 17 until the cleaning brush 9 contacts the screen 17 to clean.

[0049] When the second writing board 2 approaches the first writing board 1, the gear 10 on the second writing board 2 meshes with the tooth 13 again, and at this time, the tooth 13 is pushed to move the moving block 12 towards the elastic member, which is the compression spring 16. The movement of the moving block 12 enables the adjusting part to move the tooth 13 into the placing hole 11. After the tooth 13 enters the placing hole 11, the tooth 13 is disengaged from the gear 10, and during the whole process, the gear 10 does not rotate. The second writing board 2 continues to move towards the first writing board 1 until the bristles on the cleaning brush 9 cooperate with the shell 5.

[0050] For ease of understanding, the present application is exemplified again:

[0051] When the second writing board 2 is close to the first writing board 1, the cleaning brush 9 is driven to rotate by the gear 10, so that the clean surface faces the screen 17 and the contaminated surface faces the housing 5 on the first writing board 1. Then, the cleaning brush 9 sweeps the surface of the screen 17, and at this time, the cleaning brush 9 forms two contaminated surfaces: one is the contaminated surface originally facing the first writing board 1, and the other is the newly contaminated surface after the sweeping. Then, the second writing board 2 starts to move towards the first writing board 1, and when the cleaning brush 9 approaches the first writing board 1, the contaminated surface originally facing the housing 5 contacts the housing 5 for cleaning. This is one round trip of the second writing board 2, and only one rotation of the gear 10. After cleaning, the second writing board 2 moves away from the first writing board 1 again, and the cleaning brush 9 is driven to rotate by the gear 10, so that the remaining contaminated surface faces the direction of the housing 5 on the first writing board 1. Through the reciprocating movement and the periodic rotation of the cleaning brush 9, the two working surfaces of the cleaning brush 9 are alternately used and cleaned, ensuring the cleaning efficiency and continuity. At the end of each cycle, the cleaning brush 9 returns to the initial state, ready for the next round of cleaning, thereby ensuring the continuity and stability of the cleaning work.

[0052] As mentioned above, the second writing board 2 is provided with the cleaning brush 9, the rotating rod 8 is arranged through the cleaning brush 9, the gear 10 is fixedly arranged on the rotating rod 8, and the gear 10 is suspended in the first sliding rail 3 when the gear 10 moves towards the direction of the teeth 13 without being engaged with the teeth 13 (please refer to the gear 10 in FIG. 6). Figure 6 When the gear 10 contacts the teeth 13 (the teeth 13 are in the movement track of the gear 10, so they must contact), the gear 10 is engaged with the teeth 13. One end of the teeth 13 is in abutment with the inner wall of the placement hole 11, so this end cannot move. The other end of the teeth 13 is connected with the elastic member, so this end of the teeth 13 can move. Since the teeth 13 cannot move and the gear 10 needs to continue to move forward, the engagement point of the teeth of the gear 10 and the teeth 13 becomes a fulcrum. Under the action of the fulcrum, the gear 10 cannot move straight, but can rotate around the fulcrum, which is the flipping process of the gear 10. The center of gravity of the gear 10 moves to the other side of the fulcrum, and under the joint action of gravity and the continuous forward force, the gear 10 flips around the engagement point to continue its movement path.

[0053] The adjusting part includes the first inclined surface 14 arranged on the bottom wall of the placement hole 11 and the second inclined surface 15 arranged on the bottom of the moving block 12 and matched with the first inclined surface 14. When the moving block 12 moves towards the compression spring 16, the matching of the first inclined surface 14 and the second inclined surface 15 can make the teeth 13 enter the placement hole 11.

[0054] The initial state of the teeth 13 is that part of the teeth 13 is exposed outside the placement hole 11. When the moving block 12 moves, the moving block 12 moves from the high part of the first inclined surface 14 to the low part of the first inclined surface 14. Due to the cooperation of the first inclined surface 14 and the second inclined surface 15, the teeth 13 are not tilted when slowly entering the placement hole 11, but are in a vertical downward movement state. Until the teeth 13 do not hinder the gear 10, the gear 10 remains stationary, and the second writing board 2 continues to move towards the first writing board 1. When the second writing board 2 reaches the movement limit, the cleaning brush 9 of the second writing board 2 cooperates with the shell 5 of the first writing board 1. The back-and-forth movement of the second writing board 2 can only be flipped once, and can only be flipped in the same direction, so that the bristles of each part can clean the screen 17. No additional power source or manual operation is required, which improves cleaning efficiency and convenience. It not only ensures that the cleaning brush 9 can automatically replace the cleaning surface during each use, improving the cleaning effect, but also helps to shake off dust attached to the bristles through centrifugal force during the flipping process, further enhancing the cleaning effect.

[0055] It should be noted that the bristles of the cleaning brush 9 of the present application are designed to be soft, the main purpose being to gently clean the screen 17 without causing scratches. This softness means that the bristles will easily bend when they contact the screen 17. When the soft bristles contact the screen 17, they will bend in all directions. This bending will distribute the force acting on each bristle, so that there is not enough concentrated force to cause rotation of the entire cleaning brush 9. Another is the softness of the bristles, the friction between them and the screen 17 is actually very small. This small friction is not enough to overcome the weight of the cleaning brush 9 itself.

[0056] It should be noted that the elastic member is a compression spring 16. The resistance required to drive the gear 10 to flip is at least A, and the maximum damping provided by the compression spring 16 is B. The present application satisfies A greater than B, so it does not generate resistance to the gear 10 that can cause it to flip.

[0057] The above specific embodiments further illustrate the purpose, technical solutions and advantages of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A multimedia teaching device comprising a first writing board (1), a second writing board (2) and two first slide rails (3), characterized in that, The first writing board (1) is provided with an adsorption assembly for adsorbing dust, the second writing board (2) is rotatably provided with a cleaning brush (9), the cleaning brush (9) is provided with a matching part, and the first sliding rail (3) is provided with a driving assembly connected with the matching part, the driving assembly drives the cleaning brush (9) to rotate through the matching part; The matching part comprises a rotating rod (8) penetrating through the cleaning brush (9), both ends of the rotating rod (8) are provided with gears (10), the gears (10) are located on the first sliding rail (3), the driving assembly comprises a placing hole (11) formed in the side wall of the first sliding rail (3), the placing hole (11) is provided with an elastic member, the elastic member is connected with a moving block (12), the moving block (12) is provided with a gear tooth (13) matched with the gear (10), part of the gear tooth (13) is located outside the placing hole (11), and the placing hole (11) is further provided with an adjusting part, when the moving block (12) moves towards the elastic member, the adjusting part moves the gear tooth (13) into the placing hole (11); The adjusting part comprises a first inclined surface (14) formed in the bottom wall of the placing hole (11), the bottom of the moving block (12) is provided with a second inclined surface (15) matched with the first inclined surface (14), when the moving block (12) moves towards the compression spring (16), the cooperation between the first inclined surface (14) and the second inclined surface (15) can make the gear tooth (13) enter the placing hole (11); The adsorption assembly comprises a shell (5) provided on the first writing board (1), the shell (5) is arranged on the side of the first writing board (1) close to the cleaning brush (9), the shell (5) is provided with a through hole (6) for the bristles of the cleaning brush (9) to enter, and the shell (5) is provided with an electrostatic adsorption material; The second writing board (2) and the first writing board (1) can be partially overlapped; in the initial state, the second writing board (2) is close to the first writing board (1), and the screen (17) is located on one side of the first writing board (1) and the second writing board (2); when the second writing board (2) slides away from the first writing board (1), before the cleaning brush (9) contacts the screen (17), the gear (10) provided on the second writing board (2) contacts the gear tooth (13), the gear (10) meshes with the gear tooth (13), at this time, the moving block (12) cannot move, the gear tooth (13) is stationary, the gear (10) is flipped, thereby driving the cleaning brush (9) to flip; the flipped cleaning brush (9) continues to move towards the screen (17), until the cleaning brush (9) contacts the screen (17) to clean; when the second writing board (2) approaches the first writing board (1), the gear (10) on the second writing board (2) meshes with the gear tooth (13) again, the gear tooth (13) is driven to move towards the elastic member, so that the gear tooth (13) moves into the placing hole (11), the gear tooth (13) is separated from the gear (10), the gear (10) cannot rotate, the second writing board (2) continues to move towards the first writing board (1), until the bristles on the cleaning brush (9) cooperate with the shell (5).

2. The multimedia teaching apparatus according to claim 1, wherein A baffle is hingedly connected to the shell (5) and used to cover the through hole (6), and a trigger lever is arranged on the cleaning brush (9) and has a length less than that of the bristles of the cleaning brush (9).

3. The multimedia teaching apparatus according to claim 1, wherein The electrostatic adsorption material comprises an electrostatic adsorption pad (7).

4. The multimedia teaching apparatus according to claim 3, wherein The electrostatic adsorption pad (7) is detachably arranged in the shell (5).

5. The multimedia teaching apparatus according to claim 1, wherein A dust collecting box is further arranged at the bottom of the shell (5).

6. The multimedia teaching apparatus according to claim 1, wherein The shell (5) is made of transparent material.

7. The multimedia teaching apparatus according to claim 1, wherein The elastic member is a compression spring (16).

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