Orbital transfer device, orbital transfer assembly and push-pull blackboard

Abstract

The utility model provides an orbital transfer device, an orbital transfer assembly and a push-pull blackboard, and belongs to the technical field of teaching aids. The rail transfer device comprises a supporting frame, guide wheels, a blackboard connecting mechanism, a front-back sliding mechanism and a left-right sliding mechanism. A front-back sliding mechanism and a left-right sliding mechanism are installed on the supporting frame. The blackboard connecting mechanism is connected with the front-back sliding mechanism, and the blackboard connecting mechanism is connected with the supporting frame through the front-back sliding mechanism. A guide wheel is installed on the blackboard connecting mechanism. The front-and-back sliding mechanism and the left-and-right sliding mechanism are combined together, and the rail transfer device can support smooth sliding movement of the push-and-pull blackboard in the front-and-back direction and the left-and-right direction. Multidirectional stable movement of the blackboard is achieved, and meanwhile the stability and durability of the system are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching aids, in particular to a track changer and a track change component and a push-pull blackboard provided with the track changer. Background Art

[0002] As an essential traditional writing and presentation tool for education, training, and meetings, the blackboard has long occupied a central position in the classroom. However, the limitations of traditional fixed blackboards are becoming increasingly apparent, especially in large classrooms or multi-purpose meeting rooms. Their fixed nature not only limits the flexible use of space but can also obstruct students' views on either side of the room, impacting learning outcomes. To address this issue, sliding blackboards have emerged. These slide-type blackboards allow them to be moved along the wall or on specific tracks, optimizing space layout and improving the efficiency of teaching and presentations.

[0003] While existing technologies have made some progress, there are still areas for improvement in practical applications. For example, how to further simplify the sliding mechanism and reduce friction for smoother blackboard sliding; how to improve the stability and durability of the blackboard structure and reduce maintenance costs; and how to ensure the quick and precise positioning of the movable blackboard while enhancing its seamless connection with the fixed blackboard to provide a more comfortable teaching environment. These are all key areas for future research and development. Utility Model Content

[0004] In view of the above problems, the purpose of the present invention is to provide a track changer that is convenient, stable and easy to operate.

[0005] In a first aspect, a track changer is provided for use in pushing and pulling a blackboard, comprising: a support frame, guide wheels, a blackboard connecting mechanism, a front-back sliding mechanism, and a left-right sliding mechanism;

[0006] The front-rear sliding mechanism and the left-right sliding mechanism are installed on the support frame;

[0007] The blackboard connecting mechanism is connected to the front-back sliding mechanism, and the blackboard connecting mechanism is connected to the support frame through the front-back sliding mechanism;

[0008] The guide wheel is installed on the blackboard connecting mechanism.

[0009] Furthermore, there are two left and right sliding mechanisms;

[0010] The two left and right sliding mechanisms are respectively arranged on the front and rear sides of the support frame.

[0011] Furthermore, the left and right sliding mechanism is a slider;

[0012] The edge of the slider is configured to be arc-shaped.

[0013] Furthermore, the slider includes a first head, a second head and a connecting portion;

[0014] Two ends of the connecting portion are respectively connected to one end of the first head and one end of the second head;

[0015] The height of the connecting portion is smaller than the height of the first head portion and / or the height of the second head portion.

[0016] Furthermore, the slider is provided with a mounting hole;

[0017] The support frame is provided with an assembly hole adapted to the mounting hole;

[0018] The slider is connected to the support frame by fasteners passing through the installation hole and the assembly hole in sequence.

[0019] Furthermore, the mounting hole includes a screw head hole and a screw rod hole connected in sequence;

[0020] The depth of the screw head hole is greater than the height of the head of the fastener.

[0021] Furthermore, the front-rear sliding mechanism includes a slide groove group and a pulley group;

[0022] The slide groove group is arranged on the support frame; the extension direction of the slide groove group is perpendicular to the moving direction of the left and right sliding mechanism;

[0023] The pulley block is connected to the blackboard connection mechanism;

[0024] The pulley group and the slide groove group are adapted to be slidably engaged with each other to connect the blackboard connection mechanism with the support frame.

[0025] Furthermore, it also includes a track change auxiliary mechanism;

[0026] Two ends of the track-changing auxiliary mechanism are respectively connected to the blackboard connecting mechanism and the supporting frame.

[0027] Furthermore, the track-changing auxiliary mechanism is a tension spring;

[0028] The two ends of the tension spring are respectively connected to the blackboard connecting mechanism and the supporting frame.

[0029] Furthermore, the blackboard connection mechanism includes a connection bracket and a connection plate;

[0030] One end of the connecting bracket is connected to the front-rear sliding mechanism, and the other end is connected to the connecting plate;

[0031] The connecting plate is provided with a connecting portion connected to the blackboard.

[0032] Furthermore, the connecting portion is a strip-shaped connecting hole provided on the connecting plate.

[0033] Furthermore, the length direction of the strip-shaped connecting hole is consistent with the length direction of the movable blackboard.

[0034] Furthermore, the blackboard connecting mechanism and the guide wheel are respectively arranged on the upper and lower sides of the support frame.

[0035] In a second aspect, a track change assembly is provided, comprising a track changer and a track as described in the above technical solution;

[0036] The track is provided with a guide rail groove and a guide wheel groove;

[0037] The left and right sliding mechanism is adapted to be slidably connected with the guide rail groove;

[0038] The guide wheel is adapted to be slidably connected to the guide wheel groove.

[0039] In a third aspect, a track change assembly is provided, comprising a track changer and a guide rail slot head piece as described in the above technical solution;

[0040] The guide rail slot head is provided with an arc-shaped guide slot with one end open and the other end closed;

[0041] The closed end of the arc-shaped guide groove is arranged close to the back of the movable blackboard;

[0042] The guide wheel can be adaptively connected to the arc-shaped guide groove.

[0043] In a fourth aspect, a track change assembly is provided, comprising a track changer, a track, and a guide rail slot head piece as described in the above technical solution;

[0044] The track is provided with a guide rail groove and a guide wheel groove; the guide wheel groove is provided with a notch;

[0045] The guide rail slot head is provided with an arc-shaped guide slot with one end open and the other end closed;

[0046] The opening of the arc-shaped guide groove is adapted to be connected with the notch, and the closed end of the arc-shaped guide groove is arranged close to the back of the movable blackboard;

[0047] The left and right sliding mechanism is adapted to be slidably connected with the guide rail groove;

[0048] The guide rail is adapted for sliding connection with the guide wheel groove and the arc-shaped guide groove.

[0049] In a fifth aspect, a sliding blackboard is provided, comprising the track changing assembly as described in the above technical solution, as well as a fixed blackboard and a movable blackboard;

[0050] The fixed blackboard is fixedly connected to the track;

[0051] The top and / or bottom of the movable blackboard is connected to the blackboard connecting mechanism of the track changer;

[0052] The movable blackboard and the fixed blackboard are in the same plane and fit tightly together, which is the first state; the movable blackboard and the fixed blackboard are overlapped front and back, which is the second state;

[0053] When the left-right sliding mechanism slides in the guide rail groove, and the guide rail slides in the guide wheel groove and the arc guide groove, the movable blackboard can be repeatedly switched between the first state and the second state.

[0054] Furthermore, the fixed blackboard and the movable blackboard are each one piece.

[0055] Furthermore, there are two fixed blackboards and two movable blackboards;

[0056] The two fixed blackboards are arranged at intervals;

[0057] The two movable blackboards are closely arranged and located between the two fixed blackboards.

[0058] Furthermore, the spacing distance between the two fixed blackboards is the same as the sum of the lengths of the two movable blackboards.

[0059] The embodiments of the present invention have the following advantages or beneficial effects:

[0060] 1. The front and rear sliding mechanism and the left and right sliding mechanism are combined together. The track changer can support the smooth sliding movement of the push-pull blackboard in the front and rear and left and right directions. It realizes the multi-directional and smooth movement of the blackboard while ensuring the stability and durability of the system.

[0061] 2. The left and right sliding mechanisms are sliders with curved edges. The curved edges reduce friction and ensure smoother sliding. This is particularly important during extended use and heavy loads, as low friction means less energy loss and heat generation. When subjected to lateral forces or minor impacts, the curved edges help the sliders automatically return to the correct track, reducing the risk of derailment. This self-aligning feature is particularly beneficial in applications requiring frequent or high-speed sliding, as it reduces maintenance requirements and extends equipment life. The curved edges also help distribute the load more evenly across the sliders, reducing wear or damage caused by localized excessive pressure. This is crucial for systems carrying heavy loads, ensuring the reliability and stability of the sliding mechanism throughout its lifecycle. The curved design also allows the sliders to better adapt to guide rails that are not perfectly straight or have slight deviations, thereby increasing the overall system's fault tolerance. The sliders maintain smooth sliding even on slightly curved or uneven guide rails.

[0062] 3. The depth of the screw head hole is greater than the height of the fastener head. This ensures that the fastener head does not protrude from the surface of the slider, avoiding interference with other components or causing additional friction during the sliding process. Lubricating oil can also be added to the screw head hole. When the slider slides in the track, the lubricating oil can be distributed between the slider and the track to form a lubricating film, which reduces the direct contact between the slider and the track and reduces friction. Reduced friction means a smoother sliding process, which not only improves sliding efficiency, but also reduces noise and vibration that may be generated during the sliding process, improving user experience. Continuous lubrication can reduce component wear, extend the service life of the slider and track 7, and reduce maintenance costs and replacement frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The above and other features and advantages of the present invention will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

[0064] Figure 1 It is a first-person perspective structural diagram of a track changer;

[0065] Figure 2 It is a schematic diagram of the structure of a track changer from a second perspective;

[0066] Figure 3 It is a third-perspective structural diagram of a track changer;

[0067] Figure 4 This is a schematic diagram of the first structure of a track change component;

[0068] Figure 5 This is a schematic diagram of the second structure of a track change assembly;

[0069] Figure 6It is a schematic diagram of the structure of the guide rail slot head in a track change assembly;

[0070] Figure 7 This is a schematic diagram of the third structure of a track change assembly;

[0071] Figure 8 It is a structural diagram of a push-pull blackboard.

[0072] The description of the accompanying drawings is as follows:

[0073] 1. Support frame, 2. Guide wheel, 3. Blackboard connection mechanism, 4. Forward and backward sliding mechanism, 5. Left and right sliding mechanism; 6. Track change auxiliary mechanism; 7. Track, 8. Guide rail slot head; 9. Fixed blackboard, 10. Movable blackboard;

[0074] 11. Support plate;

[0075] 31. Bracket, 32. Connecting plate, 33. Strip-shaped connecting hole;

[0076] 41. chute group, 42. pulley group;

[0077] 51. First head, 52. Second head, 53. Connecting portion, 54. Mounting hole;

[0078] 71, guide rail groove, 72, guide wheel groove;

[0079] 81. Fixed plate, 82. Arc guide groove. DETAILED DESCRIPTION

[0080] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0081] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0082] Figure 1 It is a first-person perspective structural diagram of a track changer; Figure 2 It is a schematic diagram of the structure of a track changer from a second perspective; Figure 3 It is a third-perspective structural diagram of a track changer; Figure 4 This is a schematic diagram of the first structure of a track change component; Figure 5This is a schematic diagram of the second structure of a track change assembly; Figure 6 It is a schematic diagram of the structure of the guide rail slot head in a track change assembly; Figure 7 This is a schematic diagram of the third structure of a track change assembly; Figure 8 This is a schematic diagram of the structure of a push-pull blackboard. The above diagram is not to be taken as the actual scale of the actual product.

[0083] Example 1

[0084] like Figures 1 to 3 As shown, a track changer of an embodiment of the utility model is used for pushing and pulling a blackboard, including: a support frame 1, a guide wheel 2, a blackboard connecting mechanism 3, a front and rear sliding mechanism 4 and a left and right sliding mechanism 5.

[0085] Among them, the support frame 1 is a very critical component of the structure, mainly used to provide stability and structural support. In different applications, the design and function of the support frame 1 may vary greatly, but its core role is to bear weight, resist external forces, and ensure that the supported object can work safely and reliably. The material selection of the support frame 1 is also very important. Common materials include metals (such as steel, aluminum, alloys), high-strength plastics, etc., each of which has different advantages. For example, metals usually provide better strength and durability, while plastics may be lighter and easier to process.

[0086] The support frame 1 is provided with a front-back sliding mechanism 4. The blackboard connecting mechanism 3 is connected to the front-back sliding mechanism 4, and the blackboard connecting mechanism 3 is connected to the support frame 1 through the front-back sliding mechanism 4. The main task of the front-back sliding mechanism 4 is to guide and support the movement of the blackboard in the front-back direction.

[0087] The front-to-back sliding mechanism 4 includes a chute assembly 41 and a pulley assembly 42. The chute assembly 41 is disposed on the support frame 1. The extension direction of the chute assembly 41 is perpendicular to the movement direction of the left-right sliding mechanism 5. The pulley assembly 42 is connected to the blackboard connection mechanism 3. The pulley assembly 42 and the chute assembly 41 are adapted to slide and engage with each other, thereby connecting the blackboard connection mechanism 3 to the support frame 1. The central axis of each pulley in the pulley assembly 42 is perpendicular. They are rotatably connected to the blackboard connection mechanism 3 via a rotating shaft and bearings. When the blackboard is pushed, the pulley assembly 42 slides along the trajectory of the chute assembly 41. Because the pulley central axis is perpendicular to the chute direction, the pulley can rotate smoothly within the chute, thereby driving the blackboard to move smoothly. The synergistic effect of the chute assembly 41 and the pulley assembly 42 ensures the front-to-back movement of the blackboard. At the same time, the vertical pulley central axis ensures stability and smoothness during the sliding process.

[0088] Specifically, two parallel support plates 11 extend from one side of the support frame 1 in a direction away from the support frame 1. Strip-shaped protrusions extending along the length of the support plates 11 are provided on opposite sides of the two support plates 11. The two strip-shaped protrusions constitute a slide groove group 41. The strip-shaped protrusions extend in the front-to-back direction, that is, perpendicular to the blackboard.

[0089] The two parallel support plates 11 not only increase the structural stability but also provide ample space for the chute assembly 41. Two protruding strips along the length of the support plates 11 define the boundaries of the chute assembly 41, extending in a front-to-back direction, perpendicular to the blackboard. This design ensures that the sliding assembly has clear guidance during sliding, reducing the risk of deviation from the track 7. The width and shape of the protruding strips are designed to match the sliding assembly, ensuring that the pulley assembly 42 can move smoothly within it.

[0090] In one embodiment, the pulley assembly 42 includes two sets of pulleys, each set of pulleys comprising two pulleys, i.e., the pulley assembly 42 comprises four pulleys. The four pulleys are arranged in a matrix. The outer sides of each pulley set engage with the strip-shaped protrusions. The rotation of the pulleys allows them to slide on the strip-shaped protrusions, thereby driving the synchronous movement of the blackboard connection mechanism 3 connected to the pulley assembly 42. The matrix-shaped pulley assembly 42 distributes the load more evenly, reducing the burden on individual pulleys, thereby improving the stability and durability of the overall system.

[0091] The blackboard connection mechanism 3 includes a bracket 31 and a connecting plate 32. One end of the bracket 31 is connected to the front-rear sliding mechanism 4, and the other end is connected to the connecting plate 32 (here, the connection can be detachable, for example, via fasteners). The connecting plate 32 is provided with a connecting portion 53 for connecting to the blackboard. Specifically, one end of the bracket 31 is connected to the pulley assembly 42. To prevent the installed blackboard from interfering with the overall structure, the other end of the bracket 31 extends beyond the edge of the support frame 1.

[0092] Bracket 31 is a crossbeam, one end of which is connected to the pulley block 42 of the front-rear sliding mechanism 4 and the other end is connected to the connecting plate 32. The length and strength of bracket 31 must be sufficient to support the weight of the blackboard and ensure stability during the sliding process. Connecting plate 32 is located at the other end of bracket 31 and is provided with a connecting portion 53 that connects to the blackboard. The size and shape of connecting plate 32 are designed according to the size of the blackboard and the connection requirements to ensure that the blackboard can be firmly fixed to it.

[0093] The connection between the bracket 31 and the pulley block 42 ensures the power transmission when the blackboard moves, so that the blackboard can slide smoothly in the chute block 41 along with the pulley block 42. This connection must be strong enough to withstand the weight of the blackboard and the dynamic load during the sliding process.

[0094] The connecting portion 53 (i.e., the strip-shaped connecting hole 33) on the connecting plate 32 is connected to the blackboard via fasteners. This design allows the blackboard to be adjusted within a certain range to accommodate different installation requirements. The design of the connecting portion 53 should also take into account the thickness and material of the blackboard to ensure the stability and durability of the connection.

[0095] Specifically, the connecting portion 53 is a strip-shaped connecting hole 33 provided on the connecting plate 32. The length direction of the strip-shaped connecting hole 33 is consistent with the length direction of the movable blackboard 10, that is, the length direction of the strip-shaped connecting hole 33 is the same as the moving direction of the left and right sliding mechanism 5. The length direction of the strip-shaped connecting hole 33 is consistent with the length direction of the movable blackboard 10, which means that the extension direction of the connecting hole is parallel to the longest side of the blackboard, which is usually also the moving direction of the left and right sliding mechanism 5. The length of the strip-shaped connecting hole 33 provides a larger adjustment range, allowing the blackboard to be fine-tuned during installation to adapt to different installation requirements or correct installation errors. Since the length direction of the strip-shaped connecting hole 33 is the same as the moving direction of the left and right sliding mechanism 5, this design can adapt to slight movements of the blackboard in the left and right directions without affecting the stability of the connection. This is very important for the stability of the system in the event of slight shaking or deformation that may occur during use.

[0096] The guide wheel 2 is mounted on the blackboard connection mechanism 3. Specifically, the guide wheel 2 is mounted on the bracket 31. The guide wheel 2 is connected to the bracket 31 via a connecting rod or a connecting shaft, which can be a fixed connection or a rotating connection. Of course, a rotating connection can reduce friction, so a rotating connection is preferred.

[0097] The function of the guide wheel 2 is to provide guidance and help the blackboard move along the set track 7. The rotating connection allows the guide wheel 2 to rotate freely during the movement, which significantly reduces the friction between the guide wheel 2 and the track 7, making the movement of the blackboard smoother and more labor-saving. The rotatably connected guide wheel 2 can better adapt to subtle changes in the track 7, reduce jams caused by unevenness or foreign objects in the track 7, and thus improve the stability and safety of the blackboard movement. In actual applications, the guide wheel 2 is usually connected to the connecting shaft through a bearing. The ball or needle roller inside the bearing can greatly reduce friction during rotation, ensuring the free rotation of the guide wheel 2. This design also allows the guide wheel 2 to maintain stable rolling when subjected to lateral force, thereby improving the overall performance of the system.

[0098] A vacant space is provided on the support frame 1 for the connecting rod or shaft to pass through. This vacant space provides ample space for the connecting rod or shaft to move, without interfering with the movement of the connecting rod or shaft and the guide wheel 2. One end of the connecting rod or shaft is connected to the bracket 31, and the other end is connected to the guide wheel 2. The blackboard connection mechanism 3 and the guide wheel 2 are arranged on the upper and lower sides of the support frame 1, respectively.

[0099] By placing the blackboard connection mechanism 3 and guide wheel 2 on different sides of the support frame 1, space utilization is maximized, making the overall system structure more compact while ensuring the independence and functionality of each component. This layout helps to evenly distribute the load. The weight of the blackboard is transferred to the support frame 1 through the blackboard connection mechanism 3, while the guide wheel 2 is responsible for supporting and guiding the movement of the blackboard on the track 7, avoiding excessive force on one side and improving the stability and safety of the system. At the same time, it also reduces mutual interference between components, ensuring that the guide wheel 2 is not affected by other structures during the sliding process, thereby improving the smoothness and efficiency of the sliding.

[0100] The support frame 1 is equipped with a left-right sliding mechanism 5. In one embodiment, two left-right sliding mechanisms 5 are provided; one on each of the front and rear sides of the support frame 1. The use of two left-right sliding mechanisms 5 on the front and rear sides significantly improves stability during sliding, allowing the support frame to maintain good balance and avoid shaking or swaying, even when carrying heavy loads or encountering external disturbances.

[0101] The left and right sliding mechanism 5 is a slider; the edge of the slider is set to be arc-shaped.

[0102] Sliders typically slide directly on the rails, producing less noise than pulleys that roll in contact with the rails. Slider systems are typically simpler in construction, without bearings or balls like pulleys, which means less wear and tear, a longer lifespan, and reduced maintenance requirements.

[0103] Curved edges reduce friction, ensuring smoother sliding. This is especially important during extended use and heavy loads, as low friction means less energy loss and heat generation. When the slider is subjected to lateral forces or minor impacts, the curved edges help it automatically return to the correct track, reducing the risk of derailment. This self-aligning feature is particularly beneficial in applications requiring frequent or high-speed sliding, as it reduces maintenance requirements and extends equipment life. Curved edges also help distribute the load on the slider more evenly, reducing wear or damage caused by localized excessive pressure. This is crucial for systems carrying heavy loads, ensuring the reliability and stability of the sliding mechanism throughout its lifecycle. The curved design also allows the slider to better adapt to guide rails that are not completely straight or have slight deviations, thereby increasing the overall system's fault tolerance. The slider maintains smooth sliding even on slightly curved or uneven guide rails.

[0104] The slider includes a first head 51, a second head 52 and a connecting portion 53; the two ends of the connecting portion 53 are respectively connected to one end of the first head 51 and one end of the second head 52; the height of the connecting portion 53 is less than the height of the first head 51 and / or the height of the second head 52.

[0105] The presence of the first and second heads 51, 52 increases the number of contact points between the slider and the rail 7. This provides more support points during sliding, thereby improving the stability and load-bearing capacity of the entire sliding system. This is particularly important for systems that need to carry heavy loads or operate in unstable environments. Multiple contact points help distribute the load more evenly, reducing the pressure on any single contact point, thereby reducing wear and extending the service life of the slider and rail 7.

[0106] The height of the connecting portion 53 is designed to be lower than that of the first head 51 and the second head 52 in order to avoid direct contact with the track 7 during the sliding process. The advantage of doing so is that the contact area between the slider and the track 7 is reduced, thereby reducing friction, making sliding smoother and more labor-saving. Low friction means less energy loss, which not only improves sliding efficiency, but also reduces the heat that may be generated during the sliding process, which is beneficial to the long-term stable operation of the system. The smaller height of the connecting portion 53 also allows the slider to maintain smooth sliding even when there are slight ups and downs or unevenness on the track 7, thereby improving the adaptability and fault tolerance of the system.

[0107] The slider is provided with a mounting hole 54; the support frame 1 is provided with an assembly hole that matches the mounting hole 54; the slider is connected to the support frame 1 by fasteners that pass through the mounting hole 54 and the assembly hole in sequence. When the slider needs to be replaced or maintained, the fasteners can be easily loosened and the slider can be removed for inspection or replacement without damaging other components or structures, greatly simplifying the maintenance process. The fastener connection eliminates the need for specialized tools or skills to replace or maintain the slider, reducing maintenance costs and time and improving equipment availability and production efficiency. In some cases, it may be necessary to adjust the type or number of sliders based on different loads or environmental conditions. The use of fastener connections allows users to quickly replace sliders of different specifications as needed, improving the adaptability and flexibility of the system.

[0108] The mounting hole 54 includes a screw head hole and a screw rod hole connected in sequence. The depth of the screw head hole is greater than the height of the head of the fastener. This ensures that the head of the fastener does not protrude from the surface of the slider, avoiding interference with other components or causing additional friction during the sliding process.

[0109] Lubricant can also be added to the screw head hole. As the slider slides in the track 7, the lubricant is distributed between the slider and the track 7, forming a lubricating film. This reduces direct contact between the slider and the track 7 and reduces friction. Reduced friction means a smoother sliding process, which not only improves sliding efficiency but also reduces noise and vibration that may be generated during the sliding process, improving the user experience. Continuous lubrication can reduce component wear, extend the service life of the slider and track 7, and reduce maintenance costs and replacement frequency.

[0110] In a preferred embodiment, a track-changing auxiliary mechanism 6 is further included; its two ends are connected to the blackboard connection mechanism 3 and the support frame 1, respectively. The main function of the track-changing auxiliary mechanism 6 is to assist the guide wheel 2 in turning from the guide wheel groove 72 to the guide rail groove head 8, thereby preventing the guide wheel 2 from getting stuck at the corner during turning. This is particularly important in teaching environments where the blackboard position needs to be frequently changed, as it can improve efficiency and reduce manual adjustment time.

[0111] Specifically, the track-changing auxiliary mechanism 6 can utilize a tension spring; its two ends are connected to the blackboard connection mechanism 3 and the support frame 1, respectively. The connection points of the tension spring on the blackboard connection mechanism 3 and the support frame 1 are both located away from the blackboard. A tension spring is an elastic element that stores elastic potential energy when stretched. When the external force is removed, the spring attempts to return to its original shape, releasing the stored energy and generating a rebound force.

[0112] The tension spring can be designed with different strengths according to system requirements to ensure that the restoring force it provides is greater than the friction force during the movement of the guide wheel 2, thereby overcoming friction, reducing the probability of self-locking of the guide wheel 2, and even avoiding the occurrence of self-locking of the guide wheel 2.

[0113] Example 2

[0114] like Figures 1 to 4 As shown, a track changing assembly includes the track changer and track 7 as described in Example 1.

[0115] Track 7 uses linear track 7. The use of linear guide rails is crucial to ensure that the sliding blackboard system moves smoothly and accurately.

[0116] An opening is provided on one side of the track 7 (when the track 7 is set at the top of the blackboard, an opening is provided at the bottom of the track 7. When the track 7 is set at the bottom of the blackboard, an opening is provided at the top of the track 7). A guide rail groove 71 is provided on the inner side wall of the track 7, and the left and right sliding mechanisms 5 are adapted to be slidably connected thereto, playing a guiding role, ensuring the smooth movement of the blackboard in the left and right directions. A guide wheel groove 72 is provided at the bottom of the inner wall of the track 7, which is adapted to be slidably connected to the guide wheel 2 on the blackboard connection mechanism 3. The design of the guide wheel groove 72 ensures the precise guidance and support of the blackboard in the front and rear directions, reducing shaking and friction during movement. The blackboard connection mechanism 3 is arranged on the outside of the opening and is connected to the blackboard.

[0117] When the blackboard is pushed, the left and right sliding mechanism 5 slides in the guide rail groove 71, and at the same time, the guide wheel 2 slides in the guide wheel groove 72. The cooperation of the two ensures that the blackboard can move smoothly along the track of the linear guide rail. The design of the guide rail groove 71 and the guide wheel groove 72 ensures the guidance and positioning of the track changer during the movement.

[0118] Example 3

[0119] like Figures 1 to 3 and Figure 5 、 Figure 6 As shown, a track changing assembly includes the track changer and the guide rail slot head piece 8 as described in the first embodiment.

[0120] The guide rail slot head piece 8 includes a fixed plate 81 and an arcuate guide groove 82. The arcuate guide groove 82 is arranged on the fixed plate 81. One end of the arcuate guide groove 82 is open and the other end is closed. The fixed plate 81 is the basis of the guide rail slot head piece 8, and is used to install and fix the arcuate guide groove 82. The fixed plate 81 is usually connected to the track 7 by bolts, welding or other fixing methods. The arcuate guide groove 82 is the core part of the guide rail slot head piece 8, one end of which is open and the other end is closed, forming a semi-closed arcuate channel. The design of the arcuate guide groove 82 enables the guide wheel 2 to slide in it, guiding the blackboard to move along a predetermined curved path. The design of the arcuate guide groove 82 ensures a smooth transition of the blackboard between straight and curved paths, reducing impact or jamming during movement.

[0121] When the guide rail groove head piece 8 is installed in place, the closed end of the arc guide groove 82 is arranged near the back of the movable blackboard 10. The guide wheel 2 can be connected with the arc guide groove 82 in an adaptive manner.

[0122] During installation, the closed end of the arcuate guide groove 82 of the guide rail slot head 8 should be located close to the back of the movable blackboard 10 to ensure that when the blackboard moves to that position, the guide wheel 2 can smoothly enter and connect with the arcuate guide groove 82. This design is intended to allow the blackboard to follow a predetermined curved path at a specific point or area, rather than moving in a straight line.

[0123] When the blackboard moves to the position of the arcuate guide groove 82, the guide wheel 2 connected to the blackboard connection mechanism 3 will naturally transition into the arcuate guide groove 82. Due to the closed design of the arcuate guide groove 82, the guide wheel 2 is forced to move along the arcuate path, thereby guiding the blackboard to move along a predetermined curved trajectory. This design is suitable for applications where the blackboard needs to follow a specific path (i.e., when the movable blackboard 10 overlaps the fixed blackboard 9 front and back).

[0124] Example 4

[0125] like Figures 1 to 3 and Figures 5 to 7 As shown, a track change assembly includes the track changer as described in Example 1, a track 7, and a guide rail groove head 8. The track 7 is provided with a guide rail groove 71 and a guide wheel groove 72; the guide wheel groove 72 is provided with a notch; the guide rail groove head 8 is provided with an arc-shaped guide groove 82 with one end open and the other end closed; the opening of the arc-shaped guide groove 82 is adapted to be connected with the notch, and the closed end of the arc-shaped guide groove 82 is arranged near the back of the movable blackboard 10; the left and right sliding mechanism 5 is adapted to be slidably connected with the guide rail groove 71; the guide wheel is adapted to be slidably connected with the guide wheel groove 72 and the arc-shaped guide groove 82.

[0126] The number of track changers and guide rail slot head pieces 8 is the same, and each track changer corresponds to a guide rail slot head piece 8. In this embodiment, the number of track changers and guide rail slot head pieces 8 can be multiple, and multiple track changers and guide rail slot head pieces 8 are connected to a blackboard.

[0127] Among them, the track changer, the track 7 and the guide rail slot head 8 have been described in detail in the first, second and third embodiments and will not be repeated here.

[0128] Example 5

[0129] like Figures 1 to 8 As shown, a push-pull blackboard includes the track changing assembly as described in Example 4, as well as a fixed blackboard 9 and a movable blackboard 10; the fixed blackboard 9 is fixedly connected to the track 7; the top and / or bottom of the movable blackboard 10 is connected to the blackboard connecting mechanism 3 of the track changer; the movable blackboard 10 is in the first state when it is on the same plane as the fixed blackboard 9 and fits tightly together, and is in the second state when the movable blackboard 10 overlaps with the fixed blackboard 9 front and back; when the left and right sliding mechanism 5 slides in the guide rail groove 71, and the guide slides in the guide wheel groove 72 and the arc guide groove 82, the movable blackboard 10 can be repeatedly switched between the first state and the second state.

[0130] There can be one track change assembly, which is arranged at the top of the blackboard. There can also be two track change assemblies, one at the top and one at the bottom of the blackboard.

[0131] When the movable blackboard 10 and the fixed blackboard 9 are on the same plane and closely attached, they are in a first state. When the movable blackboard 10 and the fixed blackboard 9 overlap front to back, they are in a second state. In this state, the movable blackboard 10 can cover part or all of the fixed blackboard 9, displaying an electronic screen hidden behind the movable blackboard 10 or hiding the content on the fixed blackboard 9.

[0132] The fixed blackboard 9 and the movable blackboard 10 are respectively one piece. This structure can be called a two-connected blackboard.

[0133] There are two fixed blackboards 9 and two movable blackboards 10. The two fixed blackboards 9 are spaced apart. The two movable blackboards 10 are placed close together and located between the two fixed blackboards 9. This structure can be called a four-connected blackboard. The distance between the two fixed blackboards 9 is the same as the sum of the lengths of the two movable blackboards 10.

[0134] In the embodiments of the present invention, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art will understand the specific meanings of these terms in the embodiments of the present invention based on the specific circumstances.

[0135] In the description of the embodiments of the present invention, it is necessary to understand that the terms "upper" and "lower" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0136] Throughout this specification, terms such as "one embodiment" and "a preferred embodiment" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0137] The above 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 can be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A track changer, characterized in that: The invention is applied to a push-pull blackboard, comprising: a support frame (1), a guide wheel (2), a blackboard connecting mechanism (3), a front-back sliding mechanism (4) and a left-right sliding mechanism (5); The support frame (1) is equipped with the front-back sliding mechanism (4) and the left-right sliding mechanism (5); The blackboard connecting mechanism (3) is connected to the front-rear sliding mechanism (4), and the blackboard connecting mechanism (3) is connected to the support frame (1) via the front-rear sliding mechanism (4); The guide wheel (2) is installed on the blackboard connection mechanism (3).

2. A track changer according to claim 1, characterized in that: There are two left and right sliding mechanisms (5); The two left and right sliding mechanisms (5) are respectively arranged on the front and rear sides of the support frame (1).

3. A track changer according to claim 1 or 2, characterized in that: The left and right sliding mechanism (5) is a slider; The edge of the slider is configured to be arc-shaped.

4. A track changer according to claim 3, characterized in that: The slider includes a first head portion (51), a second head portion (52) and a connecting portion (53); Two ends of the connecting portion (53) are respectively connected to one end of the first head (51) and one end of the second head (52); The height of the connecting portion (53) is smaller than the height of the first head (51) and / or the height of the second head (52).

5. The track changer according to claim 3, characterized in that: The slider is provided with a mounting hole (54); The support frame (1) is provided with an assembly hole adapted to the mounting hole (54); The slider is connected to the support frame (1) by a fastener passing through the installation hole (54) and the assembly hole in sequence.

6. A track changer according to claim 5, characterized in that: The mounting hole (54) comprises a screw head hole and a screw rod hole connected in sequence; The depth of the screw head hole is greater than the height of the head of the fastener.

7. The track changer according to claim 1, characterized in that: The front-rear sliding mechanism (4) comprises a sliding groove group (41) and a pulley group (42); The slide groove group (41) is arranged on the support frame (1); the extension direction of the slide groove group (41) is perpendicular to the moving direction of the left and right sliding mechanism (5); The pulley group (42) is connected to the blackboard connection mechanism (3); The pulley group (42) and the chute group (41) are adapted to slide and engage with each other, thereby connecting the blackboard connection mechanism (3) and the support frame (1).

8. The track changer according to claim 1, characterized in that: Also included is a track change assist mechanism (6); The two ends of the track-changing auxiliary mechanism (6) are respectively connected to the blackboard connecting mechanism (3) and the supporting frame (1); The track-changing auxiliary mechanism (6) is a tension spring; The two ends of the tension spring are respectively connected to the blackboard connection mechanism (3) and the support frame (1).

9. A track change assembly, characterized in that: It comprises a track changer according to any one of claims 1 to 8, a track (7) and a guide rail slot head piece (8); The track (7) is provided with a guide rail groove (71) and a guide wheel groove (72); the guide wheel groove (72) is provided with a notch; The guide rail groove head piece (8) is provided with an arc-shaped guide groove (82) with one end open and the other end closed; The opening of the arc-shaped guide groove (82) is adapted to be connected to the notch, and the closed end of the arc-shaped guide groove (82) is arranged close to the back of the movable blackboard (10); The left and right sliding mechanism (5) is adaptively slidably connected to the guide rail groove (71); The guide wheel is adaptively and slidably connected to the guide wheel groove (72) and the arc-shaped guide groove (82).

10. A sliding blackboard, characterized in that: It comprises the track change assembly as claimed in claim 9, as well as a fixed blackboard (9) and a movable blackboard (10); The fixed blackboard (9) is fixedly connected to the track (7); The top and / or bottom of the movable blackboard (10) is connected to the blackboard connection mechanism (3) of the track changer; When the movable blackboard (10) and the fixed blackboard (9) are on the same plane and closely attached, it is in the first state; when the movable blackboard (10) and the fixed blackboard (9) overlap front and back, it is in the second state; When the left-right sliding mechanism (5) slides in the guide rail groove (71), and the guide wheel slides in the guide wheel groove (72) and the arc guide groove (82), the movable blackboard (10) can be repeatedly switched between the first state and the second state.

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