A desk chair seat pad anti-extrusion mechanism

Abstract

This utility model discloses a mechanism to prevent seat cushions from falling off in school desks and chairs, including a supporting leg, a bushing, a rotating shaft, and a seat corner bracket. The seat corner bracket is used to install the seat cushion. One end of the rotating shaft is rotatably connected to the supporting leg via the bushing, and the other end is connected to the seat corner bracket. The supporting leg is provided with a limiting piece, and the rotating shaft is provided with a limiting groove that cooperates with the limiting piece. The limiting piece is engaged in the limiting groove, forming a limiting fit between the limiting piece and the rotating shaft. The limiting piece on the supporting leg and the limiting groove in the rotating shaft, through the cooperation between the limiting piece and the limiting groove, restrict the rotating shaft within the groove and prevent it from falling off, thus achieving the effect of preventing the seat cushion from falling off. This effectively prevents the seat cushion from falling off during use due to shaking, vibration, or misoperation, providing stable support for the user and improving the safety of the school desk and chair.

Description

Technical Field

[0001] This utility model relates to the field of school desks and chairs technology, and more specifically, to a mechanism for preventing the seat cushion of a school desk and chair from falling off. Background Technology

[0002] In lecture halls, to save space and accommodate more students and audience members, flip-up desks and chairs are commonly used. These desks and chairs have foldable seats that can be flipped up when not in use, facilitating movement through the aisles. Traditional desks and chairs typically use hinges to connect the seats and legs without any additional anti-slip measures. The significant external force generated during seat flipping or when users stand up or sit down can cause the hinges to loosen over time, leading to the seats becoming unstable and prone to falling off. Utility Model Content

[0003] This utility model provides a mechanism to prevent desk and chair seat cushions from falling off, thereby solving the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: a mechanism to prevent desk and chair seat cushions from falling off, comprising a supporting leg, a bushing, a rotating shaft, and a seat corner bracket; the seat corner bracket is used to install the seat cushion; one end of the rotating shaft is rotatably connected to the supporting leg through the bushing, and the other end is connected to the seat corner bracket; the supporting leg is provided with a limiting piece, and the rotating shaft is provided with a limiting groove that cooperates with the limiting piece, the limiting piece being engaged in the limiting groove, thus forming a limiting cooperation between the limiting piece and the rotating shaft.

[0004] Preferably, the limiting piece has a V-shaped structure, the bottom of the groove of the V-shaped structure is an arc-shaped inner bend, and the arc-shaped inner bend is engaged with the limiting groove; countersunk holes are provided at both ends of the V-shaped structure, and the countersunk holes are used to connect with the supporting foot.

[0005] Preferably, the side of the support foot is provided with a mounting groove, the mounting groove having a circular cross-section; the mounting groove is provided with an S-shaped connecting part, the S-shaped connecting part having an arc-shaped groove, the arc-shaped groove being open at the top; the seat bracket includes a circular connecting part and a seat cushion connecting part, the diameter of the circular connecting part being smaller than the diameter of the mounting groove; one end of the rotating shaft is connected to the circular connecting part, and the other end is connected to the arc-shaped groove through the bushing.

[0006] Preferably, the sidewall of the arc-shaped groove is provided with a threaded hole that mates with the countersunk hole, and the threaded hole and the countersunk hole are detachably connected by bolts.

[0007] Preferably, the S-shaped connecting part further includes a locking groove, and the circular connecting part is provided with a limiting shaft, which is configured to cooperate with the locking groove.

[0008] Preferably, the mounting groove is further provided with a slot, and the slot is provided with a removable buffer pad, which is configured to cooperate with the limiting shaft.

[0009] Preferably, the inner wall of the mounting groove is provided with a plurality of support columns, which abut against the circular connecting part.

[0010] Preferably, the end of the seat cushion connecting part is connected to the outer side of the circular connecting part, and the two ends of the seat cushion connecting part are respectively provided with connecting holes, and bolts are provided on the connecting holes to connect with the seat cushion.

[0011] Preferably, the support foot is further provided with a spring baffle, which is disposed opposite to the limiting piece and engages with the limiting groove.

[0012] Preferably, the spring baffle includes a guide rod, a guide sleeve, a spring, and a baffle. The guide rod is fixedly connected to the support foot. The guide sleeve is slidably disposed on the guide rod. The spring is sleeved on the guide rod, with one end connected to the support foot and the other end connected to the guide sleeve. The baffle is disposed at the front end of the guide sleeve and is disposed opposite to the limiting piece.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model sets a limiting piece on the supporting foot and adds a limiting groove in the rotating shaft. The rotating shaft is restricted in the groove by the cooperation between the limiting piece and the limiting groove, so that the seat cushion will not fall off. This can effectively prevent the seat cushion from falling off due to shaking, vibration, misoperation, etc. during use, provide stable support for users, and improve the safety of the desk and chair. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the anti-detachment mechanism for desk and chair seat cushions according to an embodiment of the present utility model;

[0015] Figure 2 This is a side sectional view of the anti-detachment mechanism for desk and chair seat cushions according to an embodiment of the present utility model;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 This is a partially enlarged front cross-sectional view of the anti-detachment mechanism for desk and chair seat cushions according to an embodiment of the present utility model.

[0018] Figure 5 This is an exploded view of the anti-detachment mechanism for the desk and chair seat cushions according to an embodiment of the present utility model;

[0019] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0020] exist Figures 1 to 6 In the diagram, the correspondence between the component names and the drawing numbers is as follows:

[0021] 1--Supporting foot, 11--Mounting groove, 12--S-shaped connecting part, 121--Arc groove, 1211--Threaded hole, 122--Card slot, 13--Slot, 14--Supporting column, 2--Shaft sleeve, 3--Rotating shaft, 31--Limiting groove, 4--Seat corner bracket, 41--Circular connecting part, 42--Seat pad connecting part, 5--Limiting piece, 51--Arc-shaped inner bend, 52--Counterhead hole, 6--Limiting shaft. 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 accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. The following examples are used to illustrate this utility model, but should not be used to limit the scope of this utility model.

[0023] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Please refer to Figures 1 to 6This utility model provides a mechanism to prevent desk and chair seat cushions from falling off, including a supporting leg 1, a bushing 2, a rotating shaft 3, and a seat corner bracket 4; the seat corner bracket 4 is used to install the seat cushion; one end of the rotating shaft 3 is rotatably connected to the supporting leg 1 through the bushing 2, and the other end is connected to the seat corner bracket 4; the supporting leg 1 is provided with a limiting piece 5, and the rotating shaft 3 is provided with a limiting groove 31 that cooperates with the limiting piece 5, the limiting piece 5 is engaged in the limiting groove 31, and a limiting cooperation is formed between the limiting piece 5 and the rotating shaft 3.

[0026] In this embodiment of the invention, compared to conventional structures on the market, an independent limiting piece 5 is added, and a limiting groove 31 is added to the rotating shaft 3 to cooperate with it. The combination of the limiting piece 5 and the limiting groove 31 restricts the rotating shaft 3 within the groove, preventing it from coming out and thus achieving the effect of preventing the seat cushion from falling off. Through the above structural design, the connection between the seat bracket 4, the rotating shaft 3, and the supporting leg 1 is more stable, maintaining the integrity of the entire structure during long-term use, reducing the risk of structural damage caused by the loosening or falling off of the rotating shaft 3, and extending the service life of the desk and chair.

[0027] Preferably, the limiting piece 5 has a V-shaped structure, with an arc-shaped inward bend 51 at the bottom of the groove. The arc-shaped inward bend 51 engages with the limiting groove 31. Countersunk holes 52 are provided at both ends of the V-shaped structure for connection with the supporting foot 1. In this embodiment, the overall structure of the limiting piece 5 is V-shaped, with an arc-shaped inward bend 51 at the bottom of the groove. The arc-shaped bending structure of the arc-shaped inward bend 51 better fits the limiting groove 31 on the rotating shaft 3, resulting in a larger contact surface between the limiting piece 5 and the limiting groove 31, thus better limiting the position of the rotating shaft 3.

[0028] Preferably, the side of the support foot 1 is provided with a mounting groove 11, the mounting groove 11 having a circular cross-section; the mounting groove 11 is provided with an S-shaped connecting part 12, the S-shaped connecting part 12 having an arc-shaped groove 121, the arc-shaped groove 121 being open at the top; the seat bracket 4 includes a circular connecting part 41 and a seat cushion connecting part 42, the diameter of the circular connecting part 41 being smaller than the diameter of the mounting groove 11; one end of the rotating shaft is connected to the circular connecting part 41, and the other end is connected to the arc-shaped groove 121 through the bushing 2. In this embodiment, the side of the support foot 1 is provided with a mounting groove 11, the mounting groove 11 and the circular connecting part 41 cooperate with each other and are connected by a rotating shaft 3, so that the circular connecting part 41 can rotate in the mounting groove 11. Specifically, the diameter of the mounting groove 11 is larger than the diameter of the circular connecting part 41, and there is a certain gap between the two after installation and docking, so that the rotating shaft 3 and the bushing 2 can be engaged in the arc-shaped groove 121 of the S-shaped connecting part 12. The rotating shaft 3 and the S-shaped connecting part 12 are connected by the bushing 2. During installation, the rotating shaft 3 and the bushing 2 are inserted downward from the opening at the top of the arc groove 121 until the bushing 2 enters the arc groove 121, and the limiting groove 31 on the rotating shaft 3 is engaged with the limiting piece 5.

[0029] Preferably, the sidewall of the arc-shaped groove 121 is provided with a threaded hole 1211 that mates with the countersunk hole 52, and the threaded hole 1211 and the countersunk hole 52 are detachably connected by bolts. In this embodiment, the countersunk hole 52 is provided on the limiting piece 5 so that the outer surface of the limiting piece 5 remains flat when bolted, avoiding affecting the rotation of the circular connecting part 41.

[0030] Preferably, the S-shaped connecting part 12 further includes a locking groove 122, and the circular connecting part 41 is provided with a limiting shaft 6, which is configured to cooperate with the locking groove 122. By setting the locking groove 122, which also adopts an arc-shaped curved structure, it is used to limit the limiting shaft 6 and control the rotation range of the seat bracket 4 within a certain range.

[0031] Preferably, the mounting groove 11 is further provided with a slot 13, and the slot 13 is provided with a removable buffer pad, which is configured to cooperate with the limiting shaft 6. In this embodiment, the slot 13 and the buffer pad are provided to restrict the other rotation direction of the limiting shaft 6. The buffer pad can be made of rubber, plastic or metal compression spring. When a person leaves the seat cushion, during the seat flipping process, the buffer pad can effectively buffer the collision between the limiting shaft 6 and the supporting leg 1, prevent damage caused by hard impact, and improve the service life of the table and chair.

[0032] Preferably, the inner wall of the mounting groove 11 is provided with a plurality of support columns 14, which abut against the circular connecting part 41. By providing support columns 14, the position of the circular connecting part 41 can be kept stable, reducing the shaking of the circular connecting part 41, reducing the probability of shaking and falling off, and further improving the anti-detachment effect.

[0033] Preferably, the end of the seat cushion connecting part 42 is connected to the outer side of the circular connecting part 41, and the two ends of the seat cushion connecting part 42 are respectively provided with connecting holes, and bolts are provided on the connecting holes to connect with the seat cushion.

[0034] Preferably, the support foot 1 is further provided with a spring stop plate, which is disposed opposite to the limiting piece 5 and engages with the limiting groove 31. In this embodiment, the limiting piece 5 is used to engage and limit the lower end of the limiting groove 31, while the spring stop plate is disposed opposite to the limiting piece 5 and is used to limit the top end of the rotating shaft 3, further improving the anti-detachment effect.

[0035] Preferably, the spring stop includes a guide rod, a guide sleeve, a spring, and a stop. The guide rod is fixedly connected to the support foot 1. The guide sleeve is slidably disposed on the guide rod. The spring is sleeved on the guide rod, with one end connected to the support foot 1 and the other end connected to the guide sleeve. The stop is disposed at the front end of the guide sleeve and is positioned opposite to the limiting piece 5. In this embodiment, the spring drives the guide sleeve to move on the guide rod, and the stop on the guide sleeve engages in the limiting groove 31, locking and limiting the top of the limiting groove 31. By adopting a spring-connected structure, when the rotating shaft 3 and the bushing 2 are installed, the stop can be pulled upwards. After installation, the stop is engaged in the limiting groove 31 under the action of the spring, making installation and disassembly more convenient.

[0036] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model sets a limiting piece on the supporting foot and adds a limiting groove in the rotating shaft. The rotating shaft is restricted in the groove by the cooperation between the limiting piece and the limiting groove, so that the seat cushion will not fall off. This can effectively prevent the seat cushion from falling off due to shaking, vibration, misoperation, etc. during use, provide stable support for users, and improve the safety of the desk and chair.

[0037] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A mechanism for preventing desk and chair seat cushions from slipping off, characterized in that, It includes a support foot (1), a bushing (2), a rotating shaft (3), and a seat bracket (4); the seat bracket is used to install a seat cushion; one end of the rotating shaft is rotatably connected to the support foot through the bushing, and the other end is connected to the seat bracket; the support foot is provided with a limiting piece (5), and the rotating shaft is provided with a limiting groove (31) that cooperates with the limiting piece; the limiting piece is engaged in the limiting groove, and forms a limiting cooperation between the limiting piece and the rotating shaft.

2. The anti-detachment mechanism for desk and chair seat cushions according to claim 1, characterized in that, The limiting piece has a V-shaped structure, and the bottom of the groove of the V-shaped structure is an arc-shaped inner bend (51), which is engaged with the limiting groove; countersunk holes (52) are provided at both ends of the V-shaped structure, and the countersunk holes are used to connect with the supporting foot.

3. The anti-detachment mechanism for desk and chair seat cushions according to claim 2, characterized in that, The side of the support foot is provided with an installation groove (11), the cross-section of the installation groove is circular; the installation groove is provided with an S-shaped connecting part (12), the S-shaped connecting part is provided with an arc groove (121), the arc groove is open at the top; the seat bracket includes a circular connecting part (41) and a seat cushion connecting part (42), the diameter of the circular connecting part is smaller than the diameter of the installation groove; one end of the rotating shaft is connected to the circular connecting part, and the other end is connected to the arc groove through the bushing.

4. The anti-detachment mechanism for desk and chair seat cushions according to claim 3, characterized in that, The sidewall of the arc-shaped groove is provided with a threaded hole (1211) that mates with the countersunk hole, and the threaded hole and the countersunk hole are detachably connected by bolts.

5. The anti-detachment mechanism for desk and chair seat cushions according to claim 3, characterized in that, The S-shaped connecting part also includes a locking groove (122), and the circular connecting part is provided with a limiting shaft (6), which is configured to cooperate with the locking groove.

6. The anti-detachment mechanism for desk and chair seat cushions according to claim 5, characterized in that, The mounting groove is also provided with a slot (13), and the slot is provided with a removable buffer pad, which is configured to cooperate with the limiting shaft.

7. The anti-detachment mechanism for desk and chair seat cushions according to claim 3, characterized in that, The inner wall of the mounting groove is provided with a number of support columns (14), which abut against the circular connecting part.

8. The anti-detachment mechanism for desk and chair seat cushions according to claim 3, characterized in that, The end of the seat cushion connecting part is connected to the outer side of the circular connecting part. The two ends of the seat cushion connecting part are respectively provided with connecting holes, and bolts are provided on the connecting holes to connect with the seat cushion.

9. The anti-detachment mechanism for desk and chair seat cushions according to any one of claims 1 to 8, characterized in that, The support foot is also provided with a spring baffle, which is arranged opposite to the limiting piece and engages with the limiting groove.

10. The anti-detachment mechanism for desk and chair seat cushions according to claim 9, characterized in that, The spring baffle includes a guide rod, a guide sleeve, a spring, and a baffle. The guide rod is fixedly connected to the support foot. The guide sleeve is slidably disposed on the guide rod. The spring is sleeved on the guide rod, with one end connected to the support foot and the other end connected to the guide sleeve. The baffle is disposed at the front end of the guide sleeve and is disposed opposite to the limiting piece.

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