Elastic fastener for writing support

Abstract

The utility model discloses an elastic fastener for a writing support, which comprises two symmetrically arranged support frames, a storage cross beam fixed between the two support frames, a positioning piece fixed at the upper end of the storage cross beam, a writing board rotatably connected between the two support frames, and clamping pieces fixed on the opposite surfaces of the two support frames, the clamping piece is located below the rotary connecting position of the writing board and the supporting frame and comprises a clamping plate, clamping edges are arranged at the front end and the rear end of the clamping plate, a spring seat is fixed to the right end of the clamping plate, a fixing rod is fixed in the spring seat, a baffle is fixed to the right end of the fixing rod, and the clamping piece is in sliding connection with the supporting frame. The positioning block is slidably connected with the mounting seat, a positioning groove is formed in the upper end of the positioning block, inclined planes are arranged at the front end and the rear end of the positioning groove, a sleeve is fixed to the lower end of the positioning block, the positioning block extends out, the positioning groove in the positioning block is clamped with the edge of the writing board, and it is prevented that the writing board continues to rotate after being turned over, and writing is affected.

Description

Technical Field

[0001] This utility model relates to the field of fixing and clamping technology, specifically to an elastic fastener for a writing stand. Background Technology

[0002] Blackboards are important tools for teaching, training, and communication. There are many types of blackboards, but traditional blackboards are fixed to the wall, which greatly limits their applicability. To overcome these limitations, a movable blackboard has emerged on the market, sliding on the ground via casters. However, when writing on one side and then switching to the other, the entire blackboard needs to be moved so that the other side faces forward, requiring a significant amount of space and making it inconvenient to use. A proposed solution is to rotate the blackboard directly on a fixed frame. This reduces the space occupied by the rotating blackboard, but the question of how to limit and fix the blackboard after it rotates to prevent it from rotating further becomes a pressing issue. Utility Model Content

[0003] To address the above problems, this utility model provides an elastic fastener for a writing stand, thus solving the aforementioned issues.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an elastic fastener for a writing stand, comprising two symmetrically arranged support frames, a placement beam fixed between the two support frames, a positioning member fixed at the upper end of the placement beam, a writing board rotatably connected between the two support frames, and clamping members fixed on the opposite surfaces of the two support frames, the clamping members being located below the rotatable connection between the writing board and the support frame;

[0005] The clamping component includes a clamping plate, with snap-fit ​​edges at both the front and rear ends of the clamping plate. A spring seat is fixed to the right end of the clamping plate, and a fixing rod is fixed inside the spring seat. A baffle is fixed to the right end of the fixing rod. The clamping component is slidably connected to the support frame.

[0006] The positioning component includes a positioning block and a mounting base. The positioning block is slidably connected to the mounting base. A positioning groove is provided at the upper end of the positioning block. Both ends of the positioning groove are provided with inclined surfaces. A sleeve is fixed at the lower end of the positioning block. A sliding rod is fixed inside the sleeve. A baffle is fixed at the lower end of the sliding rod.

[0007] Preferably, the outer wall of the spring seat is fixed with two symmetrically arranged limiting slides, the spring seat is provided with a compression spring, the compression spring is located on the outer wall of the fixing rod, the support frame is hollow inside, one side of the support frame is provided with a through hole corresponding to the spring seat and the limiting slides, the other side of the support frame is provided with a through hole corresponding to the fixing rod, and the fixing rod passes through the support frame and is fixed with a baffle.

[0008] Preferably, the outer wall of the sleeve is fixed with two symmetrically arranged limiting strips, and a spring is provided inside the sleeve, the spring being located on the outer wall of the slide rod.

[0009] Preferably, a storage tube is fixed on the mounting base, the storage tube has countersunk holes corresponding to the sleeve and the limiting strip, and the lower end of the storage tube has a through hole corresponding to the sliding rod, the diameter of the through hole being smaller than the diameter of the baffle.

[0010] Preferably, the outer wall of the storage tube is fixed with multiple reinforcing ribs along its circumference, the reinforcing ribs are fixedly connected to the mounting base, and the mounting base, the storage tube and the reinforcing ribs are integrally formed.

[0011] Preferably, a plurality of arc-shaped anti-slip strips are fixed to the left end of the snap-fit ​​edge, and the anti-slip strips are integrally formed with the snap-fit ​​edge.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The positioning block extends to engage with the edge of the writing board through its positioning groove, preventing the writing board from continuing to rotate after being flipped, thus affecting writing. At the same time, two clamping plates hold the edge of the writing board against each other to prevent it from continuing to rotate after being flipped. This also keeps the writing board between the two support frames, preventing the writing board from detaching from the support frame at the point of rotation.

[0014] 2. By setting a snap-fit ​​edge on the clamping plate, when the writing board is flipped, the writing board will first contact the snap-fit ​​edge and compress the compression spring. As the writing board continues to rotate, it will reach the clamping plate, where the compression spring will press against the clamping plate to prevent the writing board from rotating further. By setting an inclined surface on the positioning block, when the writing board is flipped, the writing board will contact the inclined surface to facilitate the compression of the positioning block. As the writing board continues to rotate, the edge of the writing board will snap into the positioning groove. At this time, the spring will push the positioning block out, so that the positioning groove will snap and limit the writing board. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the clamping component of this utility model;

[0017] Figure 3 This is a schematic diagram of the clamping component of this utility model;

[0018] Figure 4 This is a schematic diagram of the overall positioning component of this utility model;

[0019] Figure 5 This is a schematic diagram of the positioning component of this utility model;

[0020] Figure 6 This is a cross-sectional view of the positioning component of this utility model.

[0021] The diagram shows the following labels: 1. Support frame; 2. Clamping component; 3. Positioning component; 11. Storage beam; 12. Writing board; 21. Clamping plate; 22. Snap-fit ​​edge; 23. Spring seat; 24. Limiting slide bar; 25. Fixing rod; 26. Compression spring; 27. Baffle; 28. Anti-slip strip; 31. Positioning block; 32. Positioning groove; 33. Inclined surface; 34. Sleeve; 35. Slide rod; 36. Spring; 37. Baffle plate; 38. Mounting base; 39. Storage tube; 341. Limiting strip; 391. Reinforcing rib. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] Please see Figure 1 , Figure 2 and Figure 4 An elastic fastener for a writing stand includes two symmetrically arranged support frames 1. A storage beam 11 is fixed between the two support frames 1, connecting the two support frames 1 and fixing them together. The storage beam 11 also prevents the use of pens and erasers, facilitating the placement of other items. A positioning element 3 is fixed to the upper end of the storage beam 11, limiting and fixing the writing board 12 to prevent it from rotating when flipped. The writing board 12 is rotatably connected between the two support frames 1. Clamping elements 2 are fixed to the opposite surfaces of the two support frames 1. The clamping elements 2 are located below the rotatable connection between the writing board 12 and the support frame 1, clamping and abutting the writing board 12 to prevent it from detaching from the support frame 1. This keeps the writing board 12 between the two clamping elements 2, simultaneously fixing it and preventing further flipping.

[0024] Please see Figure 1 , Figure 2 and Figure 3The clamping member 2 includes a clamping plate 21, with locking edges 22 at both its front and rear ends. A spring seat 23 is fixed to the right end of the clamping plate 21, and a fixing rod 25 is fixed inside the spring seat 23. A baffle 27 is fixed to the right end of the fixing rod 25. The clamping member 2 is slidably connected to the support frame 1. By providing locking edges 22 on the clamping plate 21, when the writing board 12 is flipped, the writing board 12 will first contact the locking edges 22 and compress the compression spring 26. As the writing board 12 continues to rotate, it will move into the clamping position. At the clamping plate 21, the compression spring 26 presses against the clamping plate 21 to compress the writing board 12, preventing the writing board 12 from continuing to rotate. By setting an inclined surface 33 on the positioning block 31, when the writing board 12 is flipped, the writing board 12 contacts the inclined surface 33, facilitating the compression of the positioning block 31. As the writing board 12 continues to rotate, its edge will engage in the positioning groove 32. At this time, the spring 36 pushes out the positioning block 31, causing the positioning groove 32 to engage and limit the writing board 12. Two symmetrically arranged limiting slide bars 24 are fixed to the outer wall of the spring seat 23. The support frame 1 is internally equipped with a compression spring 26 located on the outer wall of the fixing rod 25. The support frame 1 is hollow, with a through hole on one side corresponding to the spring seat 23 and the limiting slide 24, and a through hole on the other side corresponding to the fixing rod 25. The fixing rod 25 passes through the support frame 1 and is fixed with a baffle 27. Multiple arc-shaped anti-slip strips 28 are fixed to the left end of the snap-fit ​​edge 22, and the anti-slip strips 28 are integrally formed with the snap-fit ​​edge 22. When fixing the clamping member 2, the compression spring 26 is sleeved onto the fixing rod 25 and placed on the spring seat 23. In this process, the limiting slide bar 24 and the fixing rod 25 are inserted into the corresponding through holes on the support frame 1. After the fixing rod 25 passes through the support frame 1, a baffle 27 is fixed at the end of the fixing rod 25. The fixing rod 25 abuts against the inside of the support frame 1. The limiting slide bar 24 slides with the support frame 1 and plays a limiting role to prevent the clamping member 2 from rotating when sliding. At the same time, an anti-slip strip 28 can be set on the clamping plate 21 to increase the friction between the clamping plate 21 and the writing board 12 and prevent the writing board 12 from rotating when writing on the writing board 12.

[0025] Please see Figure 4 , Figure 5 and Figure 6The positioning component 3 includes a positioning block 31 and a mounting base 38. The positioning block 31 is slidably connected to the mounting base 38. The upper end of the positioning block 31 has a positioning groove 32, and both the front and rear ends of the positioning groove 32 have inclined surfaces 33. The lower end of the positioning block 31 is fixed with a sleeve 34, and a sliding rod 35 is fixed inside the sleeve 34. The lower end of the sliding rod 35 is fixed with a baffle 37, which extends through the positioning block 31 to engage the positioning groove 32 on the positioning block 31 with the edge of the writing board 12, preventing the writing board 12 from flipping. If the writing board 12 continues to rotate, it will affect writing. Simultaneously, two clamping plates 21 clamp the edges of the writing board 12 to prevent it from rotating further after flipping. This also positions the writing board 12 between the two support frames 1, preventing the writing board 12 from detaching from the support frame 1 at the rotatable connection point. Two symmetrically arranged limiting strips 341 are fixed to the outer wall of the sleeve 34. A spring 36 is installed inside the sleeve 34, located on the outer wall of the slide rod 35. A storage tube 39 is fixed on the mounting base 38. The upper part of the storage cylinder 39 has countersunk holes corresponding to the sleeve 34 and the limiting strip 341. The lower end of the storage cylinder 39 has a through hole corresponding to the slide rod 35. When installing the positioning block 31, first fix the mounting base 38 on the storage beam 11, then put the spring 36 on the slide rod 35 and place it in the sleeve 34. After the slide rod 35 passes through the storage cylinder 39, fix the baffle 37 at the end of the slide rod 35. At this time, the spring 36 abuts against the inside of the storage cylinder 39. The diameter of the through hole is smaller than the diameter of the baffle 37. The diameter of the through hole is set to be smaller than the diameter of the baffle 37. To prevent the positioning block 31 from detaching from the mounting base 38 when the spring 36 pushes against the positioning block 31 and rises, multiple reinforcing ribs 391 are fixed along the circumference of the outer wall of the storage tube 39. The reinforcing ribs 391 are fixedly connected to the mounting base 38. The mounting base 38, the storage tube 39 and the reinforcing ribs 391 are integrally formed. The reinforcing ribs 391 reinforce the storage tube 39. At the same time, the integral forming of the mounting base 38, the storage tube 39 and the reinforcing ribs 391 increases the firmness of the connection between them, prevents cracks, and ensures the overall rigidity.

[0026] When using this utility model:

[0027] First, install and fix the clamping part 2 and the positioning part 3;

[0028] Then, when fixing the clamping member 2, the compression spring 26 is sleeved on the fixing rod 25 and placed in the spring seat 23. The limiting slide bar 24 and the fixing rod 25 are inserted into the corresponding through holes on the support frame 1. After the fixing rod 25 passes through the support frame 1, the baffle 27 is fixed at the end of the fixing rod 25. The fixing rod 25 abuts against the inside of the support frame 1. When installing the positioning block 31, the mounting seat 38 is first fixed on the storage beam 11. The spring 36 is sleeved on the slide bar 35 and placed in the sleeve 34. After the slide bar 35 passes through the storage tube 39, the baffle 37 is fixed at the end of the slide bar 35. At this time, the spring 36 abuts against the inside of the storage tube 39.

[0029] Next, when rotating the writing board 12, press the positioning block 31 to disengage the positioning groove 32 from the writing board 12. At this time, the positioning part 3 releases the restriction of the writing board 12. After rotating the writing board 12, the other side of the writing board 12 is flipped over.

[0030] Finally, the writing board 12 will first contact the snap-fit ​​edge 22 and compress the compression spring 26. As the writing board 12 continues to rotate, it will reach the clamping plate 21. The compression spring 26 will press against the clamping plate 21 to prevent the writing board 12 from rotating further. By setting an inclined surface 33 on the positioning block 31, when the writing board 12 is flipped, it will contact the inclined surface 33 to facilitate the compression of the positioning block 31. As the writing board 12 continues to rotate, the edge of the writing board 12 will snap into the positioning groove 32. At this time, the spring 36 will push the positioning block 31 out so that the positioning groove 32 will snap into and limit the writing board 12, thus completing the fixation of the writing board 12.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A resilient fastener for a writing stand, characterized in that: It includes two symmetrically arranged support frames (1), a storage beam (11) is fixed between the two support frames (1), a positioning member (3) is fixed at the upper end of the storage beam (11), a writing board (12) is rotatably connected between the two support frames (1), and a clamping member (2) is fixed on the opposite side of the two support frames (1), the clamping member (2) is located below the rotatable connection between the writing board (12) and the support frame (1); The clamping member (2) includes a clamping plate (21), and both the front and rear ends of the clamping plate (21) are provided with snap-fit ​​edges (22). A spring seat (23) is fixed to the right end of the clamping plate (21), and a fixing rod (25) is fixed inside the spring seat (23). A baffle (27) is fixed to the right end of the fixing rod (25). The clamping member (2) is slidably connected to the support frame (1). The positioning component (3) includes a positioning block (31) and a mounting base (38). The positioning block (31) is slidably connected to the mounting base (38). The upper end of the positioning block (31) is provided with a positioning groove (32). Both the front and rear ends of the positioning groove (32) are provided with inclined surfaces (33). The lower end of the positioning block (31) is fixed with a sleeve (34). A sliding rod (35) is fixed inside the sleeve (34). A baffle (37) is fixed at the lower end of the sliding rod (35).

2. The elastic fastener for a writing stand according to claim 1, characterized in that: Two symmetrically arranged limiting slides (24) are fixed to the outer wall of the spring seat (23). A compression spring (26) is provided inside the spring seat (23). The compression spring (26) is located on the outer wall of the fixing rod (25). The support frame (1) is hollow inside. A through hole corresponding to the spring seat (23) and the limiting slide (24) is opened on one side of the support frame (1). A through hole corresponding to the fixing rod (25) is opened on the other side of the support frame (1). A baffle (27) is fixed through the support frame (1).

3. The elastic fastener for a writing stand according to claim 2, characterized in that: The sleeve (34) has two symmetrically arranged limiting strips (341) fixed on its outer wall. The sleeve (34) is provided with a spring (36), which is located on the outer wall of the slide rod (35).

4. The elastic fastener for a writing stand according to claim 3, characterized in that: A storage tube (39) is fixed on the mounting base (38). The storage tube (39) has countersunk holes corresponding to the sleeve (34) and the limiting strip (341). The lower end of the storage tube (39) has a through hole corresponding to the slide rod (35). The diameter of the through hole is smaller than the diameter of the baffle (37).

5. The elastic fastener for a writing stand according to claim 4, characterized in that: The outer wall of the storage tube (39) is fixed with a plurality of reinforcing ribs (391) along its circumference. The reinforcing ribs (391) are fixedly connected to the mounting base (38). The mounting base (38), the storage tube (39) and the reinforcing ribs (391) are integrally formed.

6. The elastic fastener for a writing stand according to claim 5, characterized in that: Multiple arc-shaped anti-slip strips (28) are fixed to the left end of the snap-fit ​​edge (22), and the anti-slip strips (28) are integrally formed with the snap-fit ​​edge (22).

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