Single-handed push-pull variable track writing board
By setting a limit frame and a slide rail in the single-hand push-pull variable track writing board, and using elastic elements to achieve single-hand operation of the sliding plate and the fixed plate being coplanar, the problem of needing two hands to push in the prior art is solved, and the sliding stability and spare parts versatility are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENAN COUNTY YUANZHU TEACHING EQUIPMENT MANUFACTURING CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-19
AI Technical Summary
Existing variable-track writing boards require operators to apply pushing force to both sides of the sliding plate to make it coplanar with the fixed plate.
A single-hand push-pull variable-track writing board was designed. By setting a limit frame at the lifting end and driven end of the moving plate and cooperating with the slide rail of the frame, and using an elastic element to provide elastic force, the limit frame is automatically reset, so that the sliding plate and the fixed plate are coplanar and can be operated with one hand.
It enables the moving plate and the fixed plate to be on the same plane without the need for two hands, the sliding process is stable and avoids jamming, and the size of the limit frame is uniform, which facilitates the replacement of spare parts.
Smart Images
Figure CN224375196U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of writing board technology, specifically relating to a single-hand push-pull variable track writing board. Background Technology
[0002] Traditional writing boards include fixed writing boards and variable-track writing boards; existing variable-track writing boards include a frame, a fixed plate fixed to the frame, and a sliding plate that can slide with the frame; the top and bottom of the frame are both slide rails, and the top and bottom of the sliding plate are both equipped with sliding carriages that slide with the slide rails. The sliding carriages at the top of the sliding plate and the corresponding sliding carriages at the bottom of the sliding plate are structurally identical.
[0003] Taking the top as an example, two sliding trolleys are set at the top of the sliding plate. Through the sliding cooperation between the sliding trolleys and the top slide rail, the sliding plate can move on the frame. A transverse moving plate is connected between the sliding plate and the sliding trolleys. The transverse moving plate is fixed on the sliding trolleys and can slide with the sliding trolleys along the width direction of the sliding plate.
[0004] When the sliding plate slides to the unfolded position, pushing the sliding plate backward allows it to slide backward along the width direction, eventually making the sliding plate coplanar with the fixed plate.
[0005] However, when the sliding plate slides to the unfolded position, the operator needs to apply a backward pushing force to both sides of the sliding plate to make the sliding plate and the fixed plate coplanar. Utility Model Content
[0006] This application provides a single-handed push-pull variable-track writing board, which aims to solve the technical problem in the prior art that the sliding plate requires the operator to apply pushing force to make it coplanar with the fixed plate.
[0007] To achieve the above objectives, the technical solution adopted in this application is as follows:
[0008] A single-hand push-pull variable-track writing board is provided, comprising:
[0009] A frame is connected to a fixed plate and a movable plate; one end of the movable plate near the fixed plate is a lifting end, and the other end is a driven end; the top of the frame has a first slide rail, which has a groove and an inclined groove at the lifting end and the driven end, respectively; the movable plate is transverse in the thickness direction, and both the lifting end and the driven end have the following features at their tops:
[0010] The carriage slides against the top of the frame and has a transverse groove; the thickness of the moving plate is per unit length.
[0011] The limiting frame slides in conjunction with the transverse slide groove and is connected to the slide frame via an elastic element; the limiting frame slides in conjunction with the first slide rail and can be inserted into the groove or inclined slot; wherein, when the lifting end moves outward by a unit length, the limiting frame at the lifting end separates from the groove; when the moving plate slides by a unit length, the limiting frame at the driven end separates from the inclined slot, and the inner side of the moving plate contacts the outer side of the fixed plate to transversely limit the moving plate.
[0012] In one possible implementation, when the movable plate is located at one end of the fixed plate, the limiting bracket of the lifting end is engaged with the groove, and the limiting bracket of the driven end is engaged with the inclined slot.
[0013] With the lateral limiting of the fixed plate, when the limiting frame of the driven end passes through the groove, it can prevent the limiting frame of the driven end from sliding into the groove.
[0014] In one possible implementation, there is a gap between the lifting end of the movable plate and the fixed plate to provide space allowance when the lifting end moves outward.
[0015] In one possible implementation, the bottom of the frame is also provided with a first slide rail, and grooves and sloping slots are also provided at the lifting end and the driven end.
[0016] The bottom of the movable plate is also provided with a slide and a limiting frame. The structure and connection method of the slide and limiting frame at the bottom of the movable plate are the same as those of the slide and limiting frame at the top of the movable plate.
[0017] In one possible implementation, handles are connected to the bottom of the outer side of the movable plate at the lifting end and the driven end, respectively.
[0018] In one possible implementation, the top of the frame has a second slide rail, which is arranged parallel to the first slide rail; a roller is rotatably provided on the carriage, and the roller is in sliding engagement with the second slide rail;
[0019] The carriage has a third slide rail arranged parallel to the transverse slide groove, and the limiting frame has rollers that slide in cooperation with the third slide rail.
[0020] In one possible implementation, the limiting frame has a connecting shaft passing through a transverse slide groove, and a roller is rotatably connected to the protruding end of the connecting shaft. The roller on the connecting shaft slides in cooperation with the first slide rail.
[0021] The connecting shaft is perpendicular to the first slide rail, and the outer peripheral wall of the roller on the connecting shaft is in contact with the side wall of the first slide rail.
[0022] In one possible implementation, the elastic element includes a spring, one end of which is connected to the carriage and the other end of which is connected to the limiting frame;
[0023] The limiting frame can slide laterally under the action of spring force.
[0024] In one possible implementation, the limiting frame is fixed to the movable plate by bolts.
[0025] In one possible implementation, the frame has a fixing plate on one side as the outer side, and the inner side of the frame is bolted to a mounting plate for fixing to the wall.
[0026] When the movable plate is located at one end of the fixed plate, the movable plate and the fixed plate are arranged side by side. At this time, the limiting bracket of the lifting end is engaged with the groove, and the limiting bracket of the driven end is engaged with the inclined groove.
[0027] When it is necessary to slide the movable plate to the outside of the fixed plate, that is, when the movable plate and the fixed plate are stacked, first pull the lifting end outward so that the lifting end moves outward by a unit length. At this time, the limiting bracket of the lifting end slides from the groove to the first slide rail, and the lifting end can slide towards the fixed plate.
[0028] When the moving plate slides a unit length toward the fixed plate, the limiting frame at the driven end can slide from the inclined groove to the first slide rail, and the inner side of the moving plate contacts the outer side of the fixed plate. At this time, the fixed plate can limit the moving plate laterally.
[0029] When the driven end limit bracket slides to the position of the groove, although the limit bracket tends to slide into the groove under the elastic force of the elastic element, the fixed plate can laterally limit the moving plate, so the driven end limit bracket will not slide into the groove.
[0030] Therefore, the driven end of the movable plate in this application slides more smoothly and the limiting bracket of the driven end will not slide into the groove, so there will be no jamming.
[0031] This application provides a single-handed push-pull variable-track writing board. Compared with the prior art, when the moving plate slides from the outside of the fixed plate to the end of the fixed plate, the driven end limit frame can smoothly pass through the groove position of the first slide rail without jamming. When the moving plate slides into place, the driven end limit frame slides into the inclined groove, the lifting end limit frame aligns with the groove, and the lifting end limit frame can slide into the groove under the elastic force of the elastic element. Therefore, it can automatically reset, making the moving plate and the fixed plate coplanar, without the operator needing to apply pushing force to both ends of the moving plate. Attached Figure Description
[0032] Figure 1 A schematic diagram of a single-handed push-pull variable-track writing board provided in an embodiment of this application;
[0033] Figure 2 for Figure 1 Enlarged diagram of section A in the middle;
[0034] Figure 3 for Figure 1 Enlarged diagram of section B;
[0035] Figure 4 for Figure 3 Enlarged diagram of section C;
[0036] Figure 5 A schematic diagram of the slide and limiting frame of a single-hand push-pull variable-track writing board provided in an embodiment of this application;
[0037] Figure 6 A schematic diagram of the elastic element portion of a single-handed push-pull variable-track writing board provided in an embodiment of this application;
[0038] Figure 7 A front view of the slide and limiting frame of a single-hand push-pull variable-track writing board provided in an embodiment of this application;
[0039] Figure 8 A schematic diagram of the first slide rail portion of a single-handed push-pull variable-track writing board provided in an embodiment of this application;
[0040] Figure 9 A schematic diagram showing the sliding plate of a single-hand push-pull variable-track writing board sliding to the outside of the fixed plate, provided in an embodiment of this application;
[0041] Figure 10 for Figure 9 Enlarged schematic diagram of section D in the middle.
[0042] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Fixed plate; 12. Moving plate; 121. Lifting end; 122. Driven end; 123. Gap; 13. First slide rail; 131. Groove; 132. Inclined groove; 14. Second slide rail; 141. Limiting groove; 2. Slide frame; 21. Transverse slide groove; 22. Elastic element; 23. Third slide rail; 3. Limiting frame; 31. Connecting shaft; 32. Connecting element; 4. Handle; 5. Roller. Detailed Implementation
[0043] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0044] Please refer to the following: Figures 1 to 10This application describes a single-handed push-pull variable-track writing board. The single-handed push-pull variable-track writing board includes a frame 1, a slide 2, and a limiting frame 3. The frame 1 is connected to a fixed plate 11 and a movable plate 12. One end of the movable plate 12 near the fixed plate 11 is a lifting end 121, and the other end is a driven end 122. The top of the frame 1 has a first slide rail 13, which has a groove 131 and a slanted groove 132 at the lifting end 121 and the driven end 122, respectively. The movable plate 12 is transversely thick. The top of both the lifting end 121 and the driven end 122 is provided with a slide 2 and a limiting frame 3. The slide 2 slides with the top of the frame 1 and has a transverse sliding groove 21. The thickness of the movable plate 12 is equal to the unit length. The limiting frame 3 slides with the transverse sliding groove 21 and is connected by an elastic element 22. The slide 121 is connected to the slide 2; the limiting frame 3 is slidably connected to the first slide rail 13, and the limiting frame 3 can be inserted into the groove 131 or the inclined groove 132; when the lifting end 121 moves outward by a unit length, the limiting frame 3 of the lifting end 121 separates from the groove 131; when the moving plate 12 slides by a unit length, the limiting frame 3 of the driven end 122 separates from the inclined groove 132, and the inner side of the moving plate 12 contacts the outer side of the fixed plate 11 to limit the moving plate 12 laterally; the bottom of the outer side of the moving plate 12 is connected to the lifting end 121 and the driven end 122 respectively with handles 4, which make it convenient for the user to pull the moving plate 12 by hand to move it, making the movement of the writing board easier and more convenient, without the user having to directly contact the surface of the moving plate 12.
[0045] The single-hand push-pull variable-track writing board provided in this application, compared with the prior art, allows the driven end 122's limiting frame 3 to smoothly pass through the groove 131 of the first slide rail 13 when the moving plate 12 slides from the outside of the fixed plate 11 to the end of the fixed plate 11, without any jamming. When the moving plate 12 slides into place, the driven end 122's limiting frame 3 slides into the inclined groove 132, and the lifting end 121's limiting frame 3 aligns with the groove 131. Under the elastic force of the elastic element 22, the lifting end 121's limiting frame 3 can slide into the groove 131, thus automatically resetting and making the moving plate 12 and the fixed plate 11 coplanar, without requiring the operator to apply pushing force to both ends of the moving plate 12.
[0046] Compared to the prior art where a separate slide rail is provided for the limiting frame 3 of the lifting end 121 and the driven end 122, the two slide rails in the prior art are arranged in parallel. Therefore, the two limiting frames 3 in the prior art have a size difference. When one of the limiting frames 3 is damaged, a limiting frame 3 of the same size must be used to replace it.
[0047] In this application, by setting a first slide rail 13, the limiting brackets 3 of both the lifting end 121 and the driven end 122 slide on the first slide rail 13. Therefore, the limiting brackets 3 of the lifting end 121 and the driven end 122 are exactly the same in size, and there is no need to prepare limiting brackets 3 of different sizes when preparing spare parts.
[0048] In some embodiments, such as Figures 1 to 10 As shown, when the movable plate 12 is located at one end of the fixed plate 11, the limiting frame 3 of the lifting end 121 is inserted into the groove 131, and the limiting frame 3 of the driven end 122 is inserted into the inclined groove 132. Under the lateral limiting of the fixed plate 11, when the limiting frame 3 of the driven end 122 passes through the groove 131, it can restrict the limiting frame 3 of the driven end 122 from sliding into the groove 131.
[0049] When the movable plate 12 is located at one end of the fixed plate 11, the movable plate 12 and the fixed plate 11 are arranged side by side. The limiting frame 3 of the lifting end 121 and the driven end 122 are respectively inserted into the groove 131 and the inclined groove 132 to make the movable plate 12 stably fixed in the initial position and reduce the occurrence of displacement of the movable plate 12.
[0050] During the sliding process of the movable plate 12 towards the fixed plate 11, the inner side of the movable plate 12 contacts the outer side of the fixed plate 11. The fixed plate 11 can play a lateral limiting role for the movable plate 12, restricting the lateral movement of the movable plate 12. Therefore, it can also limit the lateral movement of the limiting frame 3. Even when the limiting frame 3 of the driven end 122 slides from the inclined groove 132 to the position of the groove 131, the limiting frame 3 of the driven end 122 will not slide into the groove 131, improving the stability of the movable plate 12 during the sliding process and reducing the occurrence of jamming of the movable plate 12.
[0051] In some embodiments, such as Figures 1 to 10 As shown, there is a gap 123 between the lifting end 121 of the movable plate 12 and the fixed plate 11 to provide space allowance when the lifting end 121 moves outward.
[0052] By providing a gap 123 between the lifting end 121 of the movable plate 12 and the fixed plate 11, the gap 123 can play a role in avoiding movement as the lifting end 121 slides outward, allowing the lifting end 121 to move outward by a unit length, thereby facilitating the pulling of the movable plate 12 towards the fixed plate 11.
[0053] In some embodiments, such as Figures 1 to 10 As shown, the bottom of the frame 1 is also provided with a first slide rail 13, and grooves 131 and inclined grooves 132 are also provided at the lifting end 121 and the driven end 122; the bottom of the moving plate 12 is also provided with a slide 2 and a limiting frame 3. The structure and connection method of the slide 2 and the limiting frame 3 at the bottom of the moving plate 12 are the same as those of the slide 2 and the limiting frame 3 at the top of the moving plate 12.
[0054] The connection method between the slide 2 at the bottom of the movable plate 12 and the limiting frame 3 is the same as that between the slide 2 at the top of the movable plate 12 and the limiting frame 3, and will not be described again here. By setting the slide 2 and the limiting frame 3 at both the top and bottom of the movable plate 12, the stability of the movable plate 12 can be improved. The slide 2 and the limiting frame 3 at the bottom of the movable plate 12 can share part of the force. Compared with setting the slide 2 and the limiting frame 3 only at the top of the movable plate 12, the service life of the slide 2 and the limiting frame 3 at the top of the movable plate 12 can be extended.
[0055] In some embodiments, such as Figures 1 to 10 As shown, the top of the frame 1 has a second slide rail 14, which is parallel to the first slide rail 13; the slide 2 is provided with a roller 5, which is slidably engaged with the second slide rail 14; the slide 2 has a third slide rail 23 that is parallel to the transverse slide groove 21, and the limiting frame 3 has a roller 5 that is slidably engaged with the third slide rail 23.
[0056] The second slide rail 14 has a limiting groove 141 for the rolling of the roller 5. The slide 2 slides with the second slide rail 14 through the roller 5, which makes the friction between the slide 2 and the second slide rail 14 rolling friction, so that the slide 2 can slide on the second slide rail 14.
[0057] By setting a third slide rail 23 on the slide 2 and a roller 5 on the limit frame 3, the friction between the limit frame 3 and the slide 2 can be reduced, thereby improving the stability and reliability of the limit frame 3 during the sliding process.
[0058] In some embodiments, such as Figures 1 to 10 As shown, the limiting frame 3 has a connecting shaft 31 that passes through the transverse slide groove 21. A roller 5 is rotatably connected to the protruding end of the connecting shaft 31. The roller 5 on the connecting shaft 31 slides in cooperation with the first slide rail 13. The connecting shaft 31 is perpendicular to the first slide rail 13, and the outer peripheral wall of the roller 5 on the connecting shaft 31 contacts the side wall of the first slide rail 13.
[0059] It should be noted that the roller 5 is rotatably connected to the bottom end of the connecting shaft 31. During the sliding process of the limiting frame 3 following the slide 2, the roller 5 at the bottom end of the connecting shaft 31 contacts the side wall of the first slide rail 13. Therefore, the roller 5 at the bottom end of the connecting shaft 31 can roll and cooperate with the first slide rail 13, improving the stability of the limiting frame 3 sliding on the first slide rail 13.
[0060] In some embodiments, such as Figures 1 to 10 As shown, the elastic element 22 includes a spring, one end of which is connected to the slide 2 and the other end of which is connected to the limiting frame 3; wherein, the limiting frame 3 can slide laterally under the action of the spring force.
[0061] Connecting parts 32 are bolted to the side wall of the limiting frame 3 and the side wall of the slide 2. The connecting parts 32 have hooks that are connected to the ends of the springs. With the above arrangement, the two ends of the springs can be stably connected to the slide 2 and the limiting frame 3, providing elastic force to the limiting frame 3.
[0062] When the limiting bracket 3 of the lifting end 121 is aligned with the groove 131, the spring provides tension to the limiting bracket 3 so that the limiting bracket 3 of the lifting end 121 and the groove 131 are engaged; during the process of the limiting bracket 3 of the driven end 122 sliding into the inclined groove 132, the spring at the position of the driven end 122 can also provide tension to the limiting bracket 3.
[0063] In some embodiments, such as Figures 1 to 10 As shown, the limiting frame 3 is fixed to the movable plate 12 by bolts. The side of the frame 1 with the fixing plate 11 is the outer side. The inner side of the frame 1 is connected to the mounting plate (not shown in the figure) by bolts. The mounting plate is used to fix it to the wall. The mounting plate is an L-shaped plate.
[0064] The above setup allows the writing board to be securely fixed to the wall, providing reliable support for writing; the bolt connection facilitates disassembly and assembly, allowing the writing board to be removed for maintenance.
[0065] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A single-handed push-pull variable rail writing board, characterized in that, include: The frame is connected to a fixed plate and a movable plate; the end of the movable plate closest to the fixed plate is the lifting end, and the other end is the driven end. The top of the frame has a first slide rail, which has a groove and a slant at the lifting end and driven end, respectively; the moving plate is transverse in the thickness direction, and both the lifting end and driven end have the following features at their tops: The carriage slides against the top of the frame and has a transverse groove; the thickness of the moving plate is per unit length. The limiting frame slides in conjunction with the transverse slide groove and is connected to the slide frame via an elastic element; the limiting frame slides in conjunction with the first slide rail and can be inserted into the groove or inclined slot; wherein, when the lifting end moves outward by a unit length, the limiting frame at the lifting end separates from the groove; when the moving plate slides by a unit length, the limiting frame at the driven end separates from the inclined slot, and the inner side of the moving plate contacts the outer side of the fixed plate to transversely limit the moving plate.
2. The single-handed push-pull variable-track writing board as described in claim 1, characterized in that, When the movable plate is located at one end of the fixed plate, the limiting bracket at the lifting end is engaged with the groove, and the limiting bracket at the driven end is engaged with the inclined groove. With the lateral limiting of the fixed plate, when the limiting frame of the driven end passes through the groove, it can prevent the limiting frame of the driven end from sliding into the groove.
3. A single-handed push-pull variable-track writing board as described in claim 1, characterized in that, The lifting end of the movable plate has a gap with the fixed plate to provide space allowance when the lifting end moves outward.
4. A single-handed push-pull variable-track writing board as described in claim 1, characterized in that, The bottom of the frame is also provided with a first slide rail, and grooves and inclined slots are also provided at the lifting end and the driven end; The bottom of the movable plate is also provided with a slide and a limiting frame. The structure and connection method of the slide and limiting frame at the bottom of the movable plate are the same as those of the slide and limiting frame at the top of the movable plate.
5. A single-handed push-pull variable-track writing board as described in claim 1, characterized in that, The bottom of the outer side of the movable plate is connected to handles at the lifting end and the driven end, respectively.
6. A single-handed push-pull variable-track writing board as described in claim 1, characterized in that, The top of the frame has a second slide rail, which is parallel to the first slide rail; the carriage is rotatably equipped with rollers, which are slidably engaged with the second slide rail. The carriage has a third slide rail arranged parallel to the transverse slide groove, and the limiting frame has rollers that slide in cooperation with the third slide rail.
7. A single-handed push-pull variable-track writing board as described in claim 6, characterized in that, The limiting frame has a connecting shaft passing through a transverse slide groove, and a roller is rotatably connected to the protruding end of the connecting shaft. The roller on the connecting shaft slides in cooperation with the first slide rail. The connecting shaft is perpendicular to the first slide rail, and the outer peripheral wall of the roller on the connecting shaft is in contact with the side wall of the first slide rail.
8. A single-handed push-pull variable-track writing board as described in claim 1, characterized in that, The elastic element includes a spring, one end of which is connected to the slide and the other end of which is connected to the limiting frame; The limiting frame can slide laterally under the action of spring force.
9. A single-handed push-pull variable-track writing board as described in claim 1, characterized in that, The limiting frame is fixed to the movable plate by bolts.
10. A single-handed push-pull variable-track writing board as described in claim 1, characterized in that, The frame has a fixing plate on one side, which is the outer side. The inner side of the frame is connected to a mounting plate by bolts, and the mounting plate is used to fix it to the wall.