Hinge assembly and folding chair

Abstract

The utility model discloses a folding chair and a hinge assembly, the hinge assembly is arranged at the hinge position of the folding chair, the hinge assembly comprises a first rotating arm and a second rotating arm which are hinged, one end of the first rotating arm is provided with a first annular cavity, and a hinge shaft penetrating through the first rotating arm and the second rotating arm is arranged in the center of the first annular cavity in a penetrating mode. A first stop block is arranged in the first annular cavity, a second stop block is arranged at one end of the second rotating arm and rotatably arranged in the first annular cavity, and when one end face of the second stop block abuts against one end face of the first stop block, the first rotating arm and the second rotating arm are positioned at the opening position. According to the hinge assembly and the folding chair applying the hinge assembly, the situation that hands are pinched due to the fact that the limiting protrusions are arranged on the outer sides of the rotating arms in the folding chair opening process can be effectively avoided, and the use safety is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of hinge components and folding chairs, specifically a hinge component and a folding chair. Background Technology

[0002] Folding chairs are commonly used for travel, fishing, camping, family leisure, outdoor sketching, etc. They are especially suitable for use in leisure places such as beaches, poolsides, and courtyards. They have a folding function and are easy to carry.

[0003] The folding function of a folding chair is generally achieved through a hinge assembly. This hinge assembly not only needs to rotate but also needs to limit movement; that is, the two rotating arms of the hinge assembly must be able to lock into place when opened to a certain angle. Therefore, the outer sides of the rotating arms of the hinge assembly have limiting protrusions for mutual restraint. When the folding chair is opened, these limiting protrusions on the two rotating arms rotate and move closer together. During this process, if a finger is accidentally placed between the two approaching limiting protrusions, it is easy to get pinched. The risk is even higher when the folding chair is opened quickly or when the user is a child or someone with low concentration. Moreover, this area is usually quite tight; if a finger is pinched, the resulting pressure can cause injury to the finger, such as bruising and swelling, and in severe cases, even fractures, posing a significant safety hazard. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a hinge assembly and a folding chair. This hinge assembly and the folding chair using this hinge assembly can effectively prevent hand pinching during the opening of the folding chair due to the limiting protrusion being located on the outside of the rotating arm, thus improving safety.

[0005] To solve the aforementioned technical problems, this utility model provides the following technical solution: a hinge assembly comprising two hinged first rotating arms and a second rotating arm. One end of the first rotating arm has a first annular cavity, and a hinge shaft passing through the center of the first annular cavity and penetrating the first and second rotating arms. A first stop is provided within the first annular cavity, and one end of the second rotating arm has a second stop. The second stop is rotatably disposed within the first annular cavity. When one end face of the second stop abuts against one end face of the first stop, the first and second rotating arms are positioned in an open position. This hinge assembly internally positions the first and second rotating arms. By abutting one end face of the second stop against one end face of the first stop, the first and second rotating arms are positioned at a certain angle when open, effectively preventing hand pinching caused by the limiting protrusions on the outside of the rotating arms during the opening of the folding chair, thus improving safety.

[0006] In the above technical solution, preferably, the center of the annular cavity of the first rotating arm is provided with a second annular cavity, and the center of the second rotating arm is provided with a first annular protrusion that matches the second annular cavity, the first annular protrusion being inserted into the second annular cavity. This structure makes the rotational connection between the first and second rotating arms more reliable, and facilitates the positioning of the first and second rotating arms during assembly.

[0007] In the above technical solution, preferably, the hinge shaft is a rivet. This structure facilitates the rotational connection between the first and second rotating arms and simplifies the installation of the hinge shaft.

[0008] In the above technical solution, preferably, an elastic gasket is provided inside the second annular cavity. When the elastic gasket works with the rivet to press the first and second rotating arms together, the elastic gasket can provide damping force, so that the first and second rotating arms can rotate with damping, and the first and second rotating arms are neither too tight nor too loose.

[0009] In the above technical solution, preferably, the annular cavity of the first rotating arm is provided with an annular groove on its outer periphery, and the second rotating arm is provided with a second annular protrusion that matches the annular groove, the second annular protrusion being inserted into the annular groove. This structure makes the rotational connection between the first and second rotating arms more reliable, and facilitates the positioning of the first and second rotating arms during assembly.

[0010] In the above technical solution, preferably, the outer wall of the hinge end of the first rotating arm is provided with a first arc surface, and the outer wall of the hinge end of the second rotating arm is provided with a second arc surface. The first rotating arm is provided with a first stop portion that protrudes towards the second rotating arm side, matching the outer wall of the second arc surface, and the second rotating arm is provided with a second stop portion that protrudes towards the first rotating arm side, matching the outer wall of the first arc surface. This structure makes the rotational connection between the first and second rotating arms more reliable and stable.

[0011] In the above technical solution, preferably, when the first rotating arm and the second rotating arm are in the open state, the thickness of the first and second stop portions on their proximal sides gradually decreases to zero from the far edge to the near edge. This structure prevents the first and second stop portions from pinching between the hands when the first and second rotating arms are extended.

[0012] A folding chair includes the aforementioned hinge assembly. This folding chair prevents fingers from being pinched at the hinge when unfolded, effectively improving safety during use.

[0013] Compared with the prior art, this utility model has the following advantages: This hinge assembly has the positioning structure of the first rotating arm and the second rotating arm located inside. The positioning of the first rotating arm and the second rotating arm is achieved by the abutting of one end face of the second stop with one end face of the first stop when the first and second rotating arms are opened to a certain angle. This effectively avoids the situation where the hand is pinched due to the limiting protrusion being located on the outside of the rotating arm during the unfolding of the folding chair, thus improving the safety of use. This folding chair can avoid the hand being pinched at the hinge when unfolded, effectively improving the safety of use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the hinge assembly when it is unfolded in an embodiment of this utility model.

[0015] Figure 2 This is an exploded structural diagram of the hinge assembly in an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of the first rotating arm in an embodiment of this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the second rotating arm in an embodiment of this utility model.

[0018] Figure 5 This is a schematic diagram of the overall structure of the hinge assembly when folded in an embodiment of this utility model.

[0019] Figure 6 This is a schematic diagram of the folding chair unfolded in an embodiment of this utility model.

[0020] Figure 7 This is a schematic diagram of the folding chair in an embodiment of the present invention when it is folded. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 6 to 7 A folding chair, wherein the hinge position of the folding chair uses a hinge assembly, the hinge assembly see [reference needed]. Figures 1 to 5The assembly includes two hinged rotating arms, a first rotating arm 1 and a second rotating arm 2. One end of the first rotating arm 1 has a first annular cavity 3, and a hinge shaft 4 passes through the center of the first annular cavity 3, penetrating both the first and second rotating arms 1 and 2. A first stop block 5 is located within the first annular cavity 3, and one end of the second rotating arm 2 has a second stop block 6. The second stop block 6 is rotatably positioned within the first annular cavity 3. When one end face of the second stop block 6 abuts against one end face of the first stop block 5, the first and second rotating arms 1 and 2 are positioned in their open positions. This hinged assembly internally positions the first and second rotating arms 1 and 2, effectively preventing hand pinching caused by the limiting protrusions on the outside of the rotating arms during the unfolding of the folding chair, thus improving safety.

[0022] In this embodiment, a second annular cavity 7 is provided at the center of the annular cavity of the first rotating arm 1, and a first annular protrusion 8 matching the second annular cavity 7 is provided at the center of the second rotating arm 2. The first annular protrusion 8 is inserted into the second annular cavity 7. This structure makes the rotational connection between the first rotating arm 1 and the second rotating arm 2 more reliable, and facilitates the positioning of the first rotating arm 1 and the second rotating arm 2 during assembly.

[0023] In this embodiment, the hinge shaft 4 is a rivet. This structure facilitates the rotational connection between the first rotating arm 1 and the second rotating arm 2, and also facilitates the installation of the hinge shaft 4.

[0024] In this embodiment, an elastic gasket 9 is provided inside the second annular cavity 7. When the elastic gasket 9 is used in conjunction with the rivet to press the first rotating arm 1 and the second rotating arm 2, the elastic gasket 9 can provide damping force, so that the first rotating arm 1 and the second rotating arm 2 can rotate with damping, and the first rotating arm 1 and the second rotating arm 2 are neither too tight nor too loose.

[0025] In this embodiment, an annular groove 10 is provided on the outer periphery of the annular cavity of the first rotating arm 1, and a second annular protrusion 11 matching the annular groove 10 is provided on the second rotating arm 2, with the second annular protrusion 11 inserted into the annular groove 10. This structure makes the rotational connection between the first rotating arm 1 and the second rotating arm 2 more reliable, and facilitates the positioning of the first rotating arm 1 and the second rotating arm 2 during assembly.

[0026] In this embodiment, the outer wall of the hinge end of the first rotating arm 1 is provided with a first arc surface 12, and the outer wall of the hinge end of the second rotating arm 2 is provided with a second arc surface 13. The first rotating arm 1 is provided with a first stop portion 14 that protrudes towards the second rotating arm 2 and matches the outer wall of the second arc surface 13. The second rotating arm 2 is provided with a second stop portion 15 that protrudes towards the first rotating arm 1 and matches the outer wall of the first arc surface 12. This structure makes the rotational connection between the first rotating arm 1 and the second rotating arm 2 more reliable and stable.

[0027] In this embodiment, when the first rotating arm 1 and the second rotating arm 2 are in the open state, the thickness of the first stop portion 14 and the second stop portion 15 on the near side gradually decreases to zero from the far edge to the near edge. This structure prevents hands from being pinched between the first stop portion 14 and the second stop portion 15 when the first rotating arm 1 and the second rotating arm 2 are extended.

[0028] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A hinged assembly comprising two hinged first rotating arms (1) and second rotating arms (2), characterized in that: The first rotating arm (1) has a first annular cavity (3) at one end. A hinge shaft (4) is provided through the center of the first annular cavity (3) and passes through the first rotating arm (1) and the second rotating arm (2). A first stop block (5) is provided in the first annular cavity (3). A second stop block (6) is provided at one end of the second rotating arm (2). The second stop block (6) is rotatably disposed in the first annular cavity (3). When one end face of the second stop block (6) abuts against one end face of the first stop block (5), the first rotating arm (1) and the second rotating arm (2) are positioned in the open position.

2. The hinge assembly as described in claim 1, characterized in that: The first rotating arm (1) has a second annular cavity (7) at its center, and the second rotating arm (2) has a first annular protrusion (8) at its center that matches the second annular cavity (7). The first annular protrusion (8) is inserted into the second annular cavity (7).

3. A hinge assembly as described in claim 2, characterized in that: The hinge shaft (4) is a rivet.

4. A hinge assembly as described in claim 3, characterized in that: An elastic gasket (9) is provided inside the second annular cavity (7).

5. A hinge assembly as described in claim 1, characterized in that: The first rotating arm (1) has an annular groove (10) on the outer periphery of its annular cavity, and the second rotating arm (2) has a second annular protrusion (11) that matches the annular groove (10). The second annular protrusion (11) is inserted into the annular groove (10).

6. A hinge assembly as described in claim 1, characterized in that: The hinge end of the first rotating arm (1) is provided with a first arc surface (12), and the hinge end of the second rotating arm (2) is provided with a second arc surface (13). The first rotating arm (1) is provided with a first stop part (14) that protrudes toward the second rotating arm (2) and matches the outer wall of the second arc surface (13). The second rotating arm (2) is provided with a second stop part (15) that protrudes toward the first rotating arm (1) and matches the outer wall of the first arc surface (12).

7. A hinge assembly as described in claim 6, characterized in that: When the first rotating arm (1) and the second rotating arm (2) are in the open state, the thickness of the first stop portion (14) and the second stop portion (15) on the near side gradually decreases to zero from the far and near edges.

8. A folding chair, characterized in that: Includes the hinge assembly as described in any one of claims 1-7.

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