A one-way toggle demonstration board for scene switching

Abstract

The invention discloses a scene switching unidirectional toggle demonstration board. The scene switching unidirectional toggle demonstration board. The scene switching tape assembly includes a shielding writing tape and a roller assembly. The unidirectional toggle assembly includes a paddle, a transmission mechanism and an elastic member, the paddle is movably arranged on the side wall of the frame, the paddle is linked with the transmission mechanism, and the transmission mechanism is linked with the roller assembly. The paddle is toggled in a first direction to drive the transmission mechanism to output the toggle action to the roller assembly, drive the roller assembly to rotate, and drive the shielding writing tape to perform a unidirectional rotational motion.

Description

Technical Field

[0001] The invention relates to the field of educational instruments, in particular to a scene switching one-way toggle demonstration board. Background Art

[0002] The teaching demonstration board in the prior art has a relatively single function. When the teacher is giving a lecture, the students' attention is scattered, and it is not easy for the students to pay attention to the knowledge points displayed by the teacher on the demonstration board. Summary of the invention

[0003] The purpose of the present invention is to provide a scene switching one-way toggle demonstration board, which is conducive to students' concentration and effectively improves the teaching quality.

[0004] The embodiment of the present invention is achieved as follows:

[0005] A scene switching one-way toggle demonstration board, comprising:

[0006] The frame has a through-type cavity in the center area, forming a mounting hole;

[0007] A background plate connected to the frame and located in the mounting hole;

[0008] The scene switching tape assembly includes a shielding writing tape and a roller assembly, wherein the roller assembly is arranged on the frame, the shielding writing tape is connected end to end and is sleeved on the roller assembly, and the background plate is located between the front and back of the shielding writing tape; and

[0009] A one-way toggle assembly includes a paddle, a transmission mechanism and an elastic member, wherein the paddle is movably arranged on a side wall of the frame, the paddle is linked to the transmission mechanism, and the transmission mechanism is linked to the roller assembly;

[0010] By moving the paddle in a first direction, the transmission mechanism is driven to output the moving action to the roller assembly, so that the roller assembly is driven to rotate, and the shielding writing tape is driven to perform a unidirectional rotational motion;

[0011] The elastic member is arranged on the frame and acts on the paddle to reset it;

[0012] Wherein, the surface of the background plate is provided with a logo portion;

[0013] The obstruction writing tape is provided with a viewing window, and the surface of the obstruction writing tape is configured to be writable by chalk or a marker;

[0014] The observation window exposes part of the identification portion, and by repeatedly moving the paddle in the first direction, the shielded writing tape is rotated half a cycle, so that the part of the identification portion exposed by the observation window can be pieced together into a complete identification portion.

[0015] During the above implementation process, the teacher sets a marking part on the background board before class. The marking part can be a printed material or a written material. For example, the printed material can be a plastic film printed with textbook knowledge points, and the written material can be graphic characters written directly on the background board. During class, the background board is covered by the shielding writing tape, and only part of it is exposed to the observation window, forming a scene, so that students can focus their attention on the observation window, and the teacher explains the knowledge points exposed by the observation window. The process described above is conducive to students' concentration and teachers' systematic explanation of knowledge points; wherein, the teacher can trigger the transmission mechanism by turning the paddle in the first direction, so that the shielding writing tape rotates a certain distance, that is, the observation window is displaced a certain distance, exposing another position of the identification part, thus forming another scene, and students can concentrate on learning in the scene. At the same time, the paddle is reset under the action of the elastic member so that it can be turned next time; the teacher continuously changes the position of the observation window by turning it back and forth, so that the knowledge points recorded in the identification part can be fully explained in the end, and a class is completed; at the same time, every time a scene is displayed in the observation window, the teacher can write on the shielding writing tape with chalk or a marker to explain and annotate the knowledge points in detail, which is conducive to students' learning efficiency.

[0016] Optionally, in a possible implementation,

[0017] The roller shaft assembly includes a main pulley shaft and a slave pulley shaft;

[0018] The main pulley shaft and the slave pulley shaft are respectively located at the lower end and the upper end of the frame and are located in the mounting hole, and the main pulley shaft is linked with the transmission mechanism;

[0019] The head and tail of the shielding writing tape are connected by Velcro, and the Velcro at the head and tail of the shielding writing tape each has a certain length, so as to adaptively adjust the total length of the shielding writing tape after the head and tail are connected;

[0020] The shielding writing roll belt is connected end to end and then sleeved on the main pulley shaft and the slave pulley shaft.

[0021] In the above-mentioned implementation process, after the paddle is pushed in the first direction, the transmission mechanism drives the main pulley shaft to rotate. Since the shielding writing tape is connected head to tail and then placed on the main pulley shaft and the slave pulley shaft, the shielding writing tape begins to rotate under the action of tension. The above-mentioned structure is simple and easy to assemble. At the same time, since it is an educational device, it is manufactured through the above-mentioned simple structure, which is conducive to cost control and thus conducive to the promotion of the device; at the same time, since the shielding writing tape is connected head to tail through Velcro, and the Velcro has a certain length, after long-term use, the tension of the shielding writing tape can be adjusted by adjusting the bonding position of the head and tail of the shielding writing tape; at the same time, since the shielding writing tape is connected head to tail through Velcro, and the surface of the shielding writing tape is used for writing, it can be removed after the class is completed, cleaned, and then reinstalled.

[0022] Optionally, in a possible implementation,

[0023] The transmission mechanism includes a primary gear shaft, a secondary gear shaft and a ratchet assembly;

[0024] The shaft of the primary gear shaft is connected to the main pulley shaft, and the two are coaxial;

[0025] The secondary gear shaft is perpendicular to the primary gear shaft and meshes with the primary gear shaft;

[0026] The output end of the ratchet assembly is connected to the secondary gear shaft, and the input end of the ratchet assembly is connected to the paddle;

[0027] The side wall of the frame is provided with a strip hole, and the extension direction of the strip hole is the thickness direction of the frame. The paddle is located in the strip hole and is paddled along the extension direction of the strip hole.

[0028] In the above-mentioned implementation process, the transmission mechanism is a gear transmission structure, which has good transmission efficiency, can accurately feed back each movement of the paddle to the main pulley shaft, and drive the shielding writing tape to rotate at an equivalent movement speed, so that when making the identification part, it can be manufactured according to the movement speed of the shielding writing tape; at the same time, because the paddle moves in the extension direction of the strip hole, in a possible implementation situation, the teacher can push the paddle inward so that the paddle is triggered, completing the rotation of the shielding writing tape, which is easy to operate.

[0029] Optionally, in a possible implementation,

[0030] The ratchet assembly includes a gear plate, a transmission ratchet and a driving ratchet;

[0031] One end of the paddle is formed in a tooth structure to engage with the gear plate;

[0032] The transmission ratchet is arranged on the surface of the gear plate and moves with the gear plate;

[0033] The secondary gear shaft is arranged on the driving ratchet, and the rotation axis of the secondary gear shaft is coaxial with the rotation axis of the driving ratchet;

[0034] The driving ratchet is located above the gear plate, and the transmission ratchet is meshed with the driving ratchet.

[0035] In the above implementation process, the paddle is toggled to drive the gear plate to move and rotate, thereby causing the transmission ratchet to move, so as to drive the ratchet wheel to move unidirectionally, drive the secondary gear shaft to rotate, and finally drive the shielding writing tape to rotate. Driving the shielding writing tape to rotate by means of gear transmission is conducive to accurately controlling the single stroke of the shielding writing tape. At the same time, since the transmission is through the gear structure, it is conducive to a compact structure and the space utilization of the scene switching unidirectional toggle demonstration board; further, through the cooperation between the transmission ratchet and the driving ratchet wheel, the unidirectional rotation of the shielding writing tape can be guaranteed, thereby ensuring the continuity and sequence of the explanation during the class.

[0036] Optionally, in a possible implementation,

[0037] At least two fixing grooves are arranged at intervals on the surface of the gear plate, and transmission ratchets are respectively arranged in the two fixing grooves;

[0038] A latch hole is formed at the bottom of each fixing groove, and each transmission ratchet is provided with a through hole, so that each transmission ratchet is fixed in the fixing groove by a latch;

[0039] The fixing groove is formed with a surrounding wall, and the surrounding wall covers the root of the transmission ratchet.

[0040] During the above implementation process, the transmission ratchet can be easily removed from the driving tooth, which is convenient for maintenance and replacement. That is, first pull out the pin, and then directly remove the transmission ratchet. After frequent use, the structure can be replaced to ensure that the writing tape can rotate normally after each pull of the paddle.

[0041] Optionally, in a possible implementation,

[0042] The ratchet assembly also includes a stop ratchet, which is fixed to the secondary gear shaft and abuts against the driving ratchet to prevent the driving ratchet from rotating in reverse;

[0043] The elastic member is a spring with one end fixed in the frame, and the other end of the spring abuts against the paddle.

[0044] In the above implementation process, the stop ratchet can effectively prevent the driving ratchet from rotating in reverse, ensuring that the secondary gear shaft will not rotate after the force on the paddle is removed and the elastic member drives the paddle to reset.

[0045] Optionally, in a possible implementation,

[0046] The shielding writing tape comprises a strip frame and a plurality of shielding flexible plates, the edge of the strip frame is provided with a hook surface of a male-female sticker, the edge of the shielding flexible plate is provided with a velvet surface of a male-female sticker, and the plurality of shielding flexible plates are arranged on the strip frame through the male-female sticker;

[0047] The observation window includes a space exposed between two spaced-apart shielding flexible plates.

[0048] In the above implementation process, the position and size of the observation window are determined by the shielding flexible board, that is, the teacher can arrange part of the shielding flexible board on the strip frame as needed. The shielding flexible board serves as the structure of the shielding identification part, and a distance is formed between two shielding flexible boards, thereby forming an observation window. By changing the distance between the two, the size of the observation window is changed.

[0049] Optionally, in a possible implementation,

[0050] One end of the background plate is provided with a mounting plate, and the mounting plate is detachably connected to the background plate;

[0051] An opening is formed on one side wall of the frame, and the opening is connected to the mounting hole;

[0052] The background plate is inserted into the mounting hole through the opening, and the mounting plate is detachably connected to the side wall of the frame through a latch.

[0053] During the above implementation process, by removing the latch, the mounting plate connected to the background plate can be removed from the frame. Furthermore, the background plate can be removed from the mounting plate to prepare the labeling part for the next lecture. For example, the background plate can be a magnetic panel equipped with a number of magnets. The teacher can prepare the paper labeling part before class and attach it to the background plate and fix it by the magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0055] Figure 1 A schematic diagram of a one-way toggle demonstration board for scene switching in this embodiment;

[0056] Figure 2 is a cross-sectional view of the background plate and the shielding writing tape in this embodiment;

[0057] Figure 3 Schematic diagram of the main pulley shaft, the primary gear shaft and the secondary gear shaft in this embodiment;

[0058] Figure 4 is a schematic diagram of the ratchet assembly and the paddle in this embodiment;

[0059] Figure 5 is a schematic diagram of the shielding writing tape in this embodiment when it is unfolded;

[0060] Figure 6 Schematic diagram of the background plate and the mounting plate in this embodiment.

[0061] Icons: 10-frame; 11-background board; 12-scene switching tape assembly; 13-one-way toggle assembly; 14-shielding writing tape; 15-pick; 16-elastic member; 17-identification part; 18-observation window; 19-main pulley shaft; 20-slave pulley shaft; 21-Velcro; 22-primary gear shaft; 23-secondary gear shaft; 24-gear plate; 25-transmission ratchet; 26-driving ratchet; 27-fixing groove; 28-stop ratchet; 29-bar frame; 30-shielding flexible plate; 31-mounting plate; 32-magnet. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0063] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0065] In the description of the present invention, it should be noted that the terms "inside", "below", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0066] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0068] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0069] This embodiment provides a scene switching one-way toggle demonstration board, which is conducive to students' concentration and effectively improves teaching quality.

[0070] Figure 1 A schematic diagram of a one-way toggle demonstration board for scene switching in this embodiment is shown. Figure 2 1 is a cross-sectional view of the background plate 11 and the shielding writing tape 14 in this embodiment. Figure 3 Schematic diagram of the main pulley shaft 19, the primary gear shaft 22 and the secondary gear shaft 23 in this embodiment. Figure 4 is a schematic diagram of the ratchet assembly and the paddle 15 in this embodiment, Figure 5 Schematic diagram of the shielding writing tape 14 when it is unfolded in this embodiment, Figure 6 Schematic diagram of the background plate 11 and the mounting plate 31 in this embodiment.

[0071] The scene switching one-way toggle demonstration board comprises a frame 10 , a background board 11 , a scene switching tape assembly 12 and a one-way toggle assembly 13 .

[0072] The central area of ​​the frame 10 is a through cavity, forming a mounting hole.

[0073] The background plate 11 is connected to the frame 10 and is located in the mounting hole.

[0074] The scene switching tape assembly 12 includes a shielding writing tape 14 and a roller assembly. The roller assembly is arranged on the frame 10. The shielding writing tape 14 is connected end to end and is sleeved on the roller assembly. The background board 11 is located between the front and back of the shielding writing tape 14.

[0075] The one-way toggle assembly 13 includes a paddle 15, a transmission mechanism and an elastic member 16. The paddle 15 is movably disposed on the side wall of the frame 10. The paddle 15 is linked to the transmission mechanism, and the transmission mechanism is linked to the roller assembly.

[0076] By pushing the paddle 15 in the first direction, the transmission mechanism is driven to output the pushing action to the roller assembly, so that the roller assembly is driven to rotate, and the shielding writing tape 14 is driven to perform a unidirectional rotational motion.

[0077] The elastic member 16 is disposed on the frame 10 and acts on the paddle 15 to reset it.

[0078] The surface of the background plate 11 is provided with a logo portion 17 .

[0079] The obscuring writing tape 14 is provided with a viewing window 18, and the surface of the obscuring writing tape 14 is configured to be writable by chalk or a marker.

[0080] The observation window 18 exposes a portion of the identification portion 17 . By repeatedly moving the paddle 15 in the first direction, the shielding writing tape 14 rotates half a cycle, so that the portion of the identification portion 17 exposed by the observation window 18 can be pieced together into a complete identification portion 17 .

[0081] In the above-mentioned implementation process, the teacher sets the identification part 17 on the background board 11 in advance before the class. The identification part 17 can be a printed material or a written material. For example, the printed material can be a plastic film with textbook knowledge points printed on it, and the written material is a graphic text written directly on the background board 11. During the class, the background board 11 is covered by the shielding writing tape 14, and only part of it is exposed to the observation window 18, forming a scene so that students can focus their attention on the observation window 18. The teacher explains the knowledge points exposed by the observation window 18. The process described above is conducive to students' concentration and the teacher's systematic explanation of the knowledge points. Among them, the teacher can trigger the transmission mechanism by toggling the paddle 15 in the first direction, so that the shielding writing tape 14 rotates a certain distance, that is, the observation window 18 moves a certain distance, exposing the identification part. Another position of 17 forms another scene, and the students concentrate on learning in this scene. At the same time, the paddle 15 is reset under the action of the elastic member 16 so that it can be paddled next time. The teacher continuously changes the position of the observation window 18 by paddled back and forth, so as to finally give a comprehensive explanation of the knowledge points recorded in the identification part 17 and complete a class. At the same time, each time the observation window 18 displays a scene, the teacher can write on the shielding writing tape 14 with chalk or a marker to explain and annotate the knowledge points in detail, which is beneficial to the students' learning efficiency.

[0082] In the present disclosure, the roller assembly includes a primary pulley shaft 19 and a secondary pulley shaft 20;

[0083] The main pulley shaft 19 and the slave pulley shaft 20 are respectively located at the lower end and the upper end of the frame 10 and are located in the mounting hole, and the main pulley shaft 19 is linked with the transmission mechanism;

[0084] The head and tail of the shielding writing tape 14 are connected by a Velcro 21, and the Velcro 21 at the head and tail of the shielding writing tape 14 each has a certain length, so as to adaptively adjust the total length of the shielding writing tape 14 after the head and tail are connected;

[0085] The shielding writing roll belt 14 is connected end to end and then sleeved on the main pulley shaft 19 and the slave pulley shaft 20.

[0086] In the above-mentioned implementation process, after the paddle 15 is pushed in the first direction, the transmission mechanism drives the main pulley shaft 19 to rotate. Since the shielding writing tape 14 is connected end to end and then placed on the main pulley shaft 19 and the slave pulley shaft 20, the shielding writing tape 14 starts to rotate under the action of tension. The above-mentioned structure is simple and easy to assemble. At the same time, since it is an educational device, it is manufactured through the above-mentioned simple structure, which is conducive to cost control and the promotion of the device; at the same time, since the shielding writing tape 14 is connected end to end by Velcro 21, and Velcro 21 has a certain length, after long-term use, the tension of the shielding writing tape 14 can be adjusted by adjusting the bonding position of the end to end of the shielding writing tape 14; at the same time, since the shielding writing tape 14 is connected end to end by Velcro 21, and the surface of the shielding writing tape 14 is used for writing, it can be removed after the class is completed, cleaned, and then reinstalled.

[0087] In the present disclosure, the transmission mechanism includes a primary gear shaft 22, a secondary gear shaft 23, and a ratchet assembly;

[0088] The shaft of the primary gear shaft 22 is connected to the main pulley shaft 19, and the two are coaxial;

[0089] The secondary gear shaft 23 is perpendicular to the primary gear shaft 22 and meshes with the primary gear shaft 22;

[0090] The output end of the ratchet assembly is connected to the secondary gear shaft 23, and the input end of the ratchet assembly is connected to the paddle 15;

[0091] The side wall of the frame 10 is provided with a strip hole, and the extension direction of the strip hole is the thickness direction of the frame 10 . The paddle 15 is located in the strip hole and is paddled along the extension direction of the strip hole.

[0092] In the above-mentioned implementation process, the transmission mechanism is a gear transmission structure, which has good transmission efficiency, can accurately feed back each movement of the paddle 15 to the main pulley shaft 19, and drive the shielding writing tape 14 to rotate at an equivalent movement speed, so that when making the identification part 17, it can be manufactured according to the movement speed of the shielding writing tape 14; at the same time, since the paddle 15 moves in the extension direction of the strip hole, in a possible implementation situation, the teacher can push the paddle 15 inward so that the paddle 15 is triggered, completing the rotation of the shielding writing tape 14, and the operation is convenient.

[0093] In the present disclosure, the ratchet assembly includes a gear plate 24, a transmission ratchet 25, and a drive ratchet 26;

[0094] One end of the paddle 15 is formed in a tooth structure to engage with the gear plate 24;

[0095] The transmission ratchet 25 is disposed on the surface of the gear plate 24 and moves along with the gear plate 24;

[0096] The secondary gear shaft 23 is disposed on the driving ratchet 26, and the rotation axis of the secondary gear shaft 23 is coaxial with the rotation axis of the driving ratchet 26;

[0097] The driving ratchet 26 is located above the gear plate 24 , and the transmission ratchet 25 is meshed with the driving ratchet 26 .

[0098] In the above implementation process, the paddle 15 is toggled to drive the gear plate 24 to move and rotate, thereby causing the transmission ratchet 25 to move, so as to drive the driving ratchet 26 to move unidirectionally, drive the secondary gear shaft 23 to rotate, and finally drive the shielding writing tape 14 to rotate. Driving the shielding writing tape 14 to rotate by means of gear transmission is conducive to accurately controlling the single stroke of the shielding writing tape 14. At the same time, since the transmission is through the gear structure, it is conducive to a compact structure and the space utilization of the scene switching unidirectional toggle demonstration board; further, the transmission ratchet 25 and the driving ratchet 26 cooperate with each other to ensure the unidirectional rotation of the shielding writing tape 14, thereby ensuring the continuity and sequence of the explanation during the class.

[0099] In the present disclosure, at least two fixing grooves 27 are provided on the surface of the gear plate 24 at intervals, and the two fixing grooves 27 are respectively provided with transmission ratchet teeth 25;

[0100] A latch hole is formed at the bottom of each fixing groove 27, and each transmission ratchet 25 is provided with a through hole, so that each transmission ratchet 25 is fixed in the fixing groove 27 by a latch;

[0101] The fixing groove 27 is formed with a surrounding wall, and the surrounding wall covers the root of the transmission ratchet.

[0102] During the above-mentioned implementation process, the transmission ratchet 25 can be easily removed from the driving tooth, which is convenient for maintenance and replacement. That is, first pull out the pin, and then directly remove the transmission ratchet. After frequent use, the structure at this location can be replaced to ensure that the shielding writing tape 14 can rotate normally after each shifting of the paddle 15.

[0103] In the present disclosure, the ratchet assembly further includes a stop ratchet 28 fixed to the secondary gear shaft 23 and abutting against the driving ratchet 26 to prevent the driving ratchet 26 from rotating in the reverse direction;

[0104] The elastic member 16 is a spring with one end fixed in the frame 10 and the other end of the spring abutting against the paddle 15 .

[0105] In the above implementation process, the stop ratchet 28 can effectively prevent the driving ratchet 26 from rotating in reverse, ensuring that the secondary gear shaft 23 will not rotate after the force on the paddle 15 is cancelled and the elastic member 16 drives the paddle 15 to reset.

[0106] In the present disclosure, the shielding writing tape 14 includes a strip frame 29 and a plurality of shielding flexible plates 30, the edge of the strip frame 29 is provided with a hook surface of a male-female sticker, the edge of the shielding flexible plate 30 is provided with a velvet surface of a male-female sticker, and the plurality of shielding flexible plates 30 are provided on the strip frame 29 through the male-female sticker;

[0107] The observation window 18 includes a space exposed between two spaced-apart shielding flexible plates 30 .

[0108] In the above-mentioned implementation process, the position and size of the observation window 18 are determined by the shielding flexible board 30, that is, the teacher can arrange part of the shielding flexible board 30 on the strip frame 29 frame 10 as needed. The shielding flexible board 30 serves as a structure for shielding the identification part 17, and a distance is formed between two shielding flexible boards 30, thereby constituting the observation window 18. By changing the distance between the two at this location, the size of the observation window 18 is changed.

[0109] In the present disclosure, a mounting plate 31 is disposed at one end of the background plate 11, and the mounting plate 31 is detachably connected to the background plate 11. An opening is formed on one side wall of the frame 10, and the opening is connected to the mounting hole;

[0110] The background plate 11 is inserted into the mounting hole through the opening, and the mounting plate 31 is detachably connected to the side wall of the frame 10 through a latch.

[0111] During the above implementation process, by removing the latch, the mounting plate 31 connected to the background plate 11 can be removed from the frame 10. Further, the background plate 11 can be disassembled from the mounting plate 31 to prepare the identification part 17 for the next lecture. For example, the background plate 11 can be a magnetic panel equipped with a plurality of magnets 32. The teacher can prepare the identification part 17 in paper form before class and attach it to the background plate 11 and fix it through the magnets 32.

[0112] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A scene switching one-way toggle demonstration board, characterized in that: include: The frame has a through-type cavity in the center area, forming a mounting hole; A background plate connected to the frame and located in the mounting hole; The scene switching tape assembly comprises a shielding writing tape and a roller assembly, wherein the roller assembly is arranged on the frame, the shielding writing tape is connected end to end and sleeved on the roller assembly, and the background plate is located between the front and back of the shielding writing tape; and A one-way toggle assembly, comprising a paddle, a transmission mechanism and an elastic member, wherein the paddle is movably disposed on the side wall of the frame, the paddle is linked to the transmission mechanism, and the transmission mechanism is linked to the roller assembly; By shifting the paddle in a first direction, the transmission mechanism is driven to output the shifting action to the roller assembly, so as to drive the roller assembly to rotate and drive the shielding writing tape to perform a unidirectional rotational motion; The elastic member is arranged on the frame and acts on the paddle to reset it; Wherein, a marking portion is disposed on the surface of the background plate, and the marking portion is a printed or written object; The obstruction writing tape is provided with an observation window, and the surface of the obstruction writing tape is configured to be writable by chalk or a marker; The observation window exposes a portion of the identification portion, and the masking writing tape is rotated half a cycle by repeatedly toggling the paddle in the first direction, so that the portion of the identification portion exposed in the observation window can be pieced together into a complete identification portion.

2. The scene switching one-way toggle demonstration board according to claim 1, characterized in that: The roller shaft assembly includes a main pulley shaft and a slave pulley shaft; The main pulley shaft and the slave pulley shaft are respectively located at the lower end and the upper end of the frame and are located in the mounting hole, and the main pulley shaft is linked with the transmission mechanism; The head and tail of the shielding writing tape are connected by Velcro, and the Velcro at the head and tail ends of the shielding writing tape each have a certain length, so as to adaptively adjust the total length of the shielding writing tape after the head and tail are connected; The shielding writing roll is connected end to end and then sleeved on the main pulley shaft and the slave pulley shaft.

3. The scene switching one-way toggle demonstration board according to claim 2, characterized in that: The transmission mechanism includes a primary gear shaft, a secondary gear shaft and a ratchet assembly; The shaft of the primary gear shaft is connected to the main pulley shaft, and the two are coaxial; The secondary gear shaft is perpendicular to the primary gear shaft and meshes with the primary gear shaft; The output end of the ratchet assembly is connected to the secondary gear shaft, and the input end of the ratchet assembly is connected to the paddle; The side wall of the frame is provided with a strip hole, and the extension direction of the strip hole is the thickness direction of the frame. The paddle is located in the strip hole and is paddled along the extension direction of the strip hole.

4. The scene switching one-way toggle demonstration board according to claim 3, characterized in that: The ratchet assembly includes a gear plate, a transmission ratchet and a driving ratchet; One end of the paddle is formed in a tooth structure to engage with the gear plate; The transmission ratchet is arranged on the surface of the gear plate and moves with the gear plate; The secondary gear shaft is arranged on the driving ratchet, and the rotation axis of the secondary gear shaft is coaxial with the rotation axis of the driving ratchet; The driving ratchet is located above the gear plate, and the transmission ratchet is meshed with the driving ratchet.

5. The scene switching one-way toggle demonstration board according to claim 4, characterized in that: At least two fixing grooves are arranged on the surface of the gear plate, and transmission ratchets are respectively arranged in the two fixing grooves; A latch hole is formed at the bottom of each of the fixing grooves, and each of the transmission ratchet teeth is provided with a through hole, so that each transmission ratchet tooth is fixed in the fixing groove by a latch pin; Wherein, the fixing groove is formed with a surrounding wall, and the surrounding wall covers the root of the transmission ratchet.

6. The scene switching one-way toggle demonstration board according to claim 5, characterized in that: The ratchet assembly further includes a stop ratchet fixed to the secondary gear shaft and abutting against the driving ratchet to prevent the driving ratchet from rotating in reverse; The elastic member is a spring with one end fixed in the frame, and the other end of the spring abuts against the paddle.

7. The scene switching one-way toggle demonstration board according to claim 6, characterized in that: The shielding writing tape comprises a strip frame and a plurality of shielding flexible plates, the edge of the strip frame is provided with a hook surface of a male-female sticker, the edge of the shielding flexible plate is provided with a velvet surface of a male-female sticker, and the plurality of shielding flexible plates are arranged on the strip frame through the male-female sticker; The observation window includes an exposed space between two spaced-apart shielding flexible plates.

8. The scene switching one-way toggle demonstration board according to claim 7, characterized in that: One end of the background plate is provided with a mounting plate, and the mounting plate is detachably connected to the background plate; An opening is formed on one side wall of the frame, and the opening is connected to the mounting hole; The background plate is inserted into the mounting hole through the opening, and the mounting plate is detachably connected to the side wall of the frame through a latch.

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