Intermediate connecting mechanism, folding chair supporting framework and folding chair

Abstract

The utility model discloses a middle connecting mechanism, a folding chair supporting framework and a folding chair, which comprise a first turnover plate, a second turnover plate, a third turnover plate and a fourth turnover plate, the first turnover plate and the second turnover plate, the second turnover plate and the third turnover plate, and the third turnover plate and the fourth turnover plate are hinged to form a four-section turnover type hinge folding structure; connecting parts used for being connected with a supporting frame of the folding chair are formed on the first turnover plate, the second turnover plate, the third turnover plate and the fourth turnover plate respectively, and the four-section turnover type hinge folding structure is configured to be in an unfolded state in a tiled and unfolded mode or a folded state in a square frame shape in a head-to-tail connection and folding mode. The middle connecting mechanism is simple and practical in overall structure, rapid and convenient to unfold and fold, high in efficiency and beneficial to reduction of production cost and improvement of market competitiveness of products.

Description

Technical Field

[0001] This utility model relates to the field of folding chair technology, specifically to an intermediate connecting mechanism, a folding chair support frame, and a folding chair. Background Technology

[0002] Chinese document CN215456693U (application date: July 23, 2021) discloses a folding chair frame, including an intermediate connecting device. The intermediate connecting device includes a main body, a stop block, a first rotating member, and a second rotating member. The stop block is placed in the inner cavity of the main body and can slide up and down along the inner cavity. The first and second rotating members are pivotally connected to the opening groove of the main body and can rotate around the pivot point. Several leg tubes are pivotally connected to the periphery of the intermediate connecting device through the first rotating member and can be unfolded downward relative to the intermediate connecting device to support the intermediate connecting device or folded upward relative to the intermediate connecting device for storage. Several front seat tubes and backrest tubes are pivotally connected to the periphery of the intermediate connecting device through the second rotating member and can be unfolded upward relative to the intermediate connecting device to support the seat cushion or folded upward relative to the intermediate connecting device for storage. Connecting each tube to the intermediate connecting device makes the folding chair more stable. However, the overall structure of the intermediate connecting device is relatively complex, which is not conducive to reducing production costs. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an intermediate connecting mechanism with a relatively simple overall structure and convenient use.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] An intermediate connecting mechanism is applied in a folding chair, including a first flip plate, a second flip plate, a third flip plate, and a fourth flip plate. The first flip plate and the second flip plate, the second flip plate and the third flip plate, and the third flip plate and the fourth flip plate are hinged to form a four-segment folding structure. The first flip plate, the second flip plate, the third flip plate, and the fourth flip plate are respectively formed with connecting parts for connecting with the support frame of the folding chair. The four-segment folding structure is configured to be able to be laid flat to form an unfolded state or to be connected end to end to form a square frame-shaped closed state.

[0006] Furthermore, the free ends of the first and fourth flip plates are respectively formed with a first flip plate bending portion and a fourth flip plate bending portion. When the four-segment folding hinge structure is connected end to end to form a square frame, the first flip plate bending portion and the fourth flip plate bending portion abut against each other to form a limit so that the four-segment folding hinge structure remains in a square frame shape.

[0007] Furthermore, the bending portions of the first and fourth flip plates are bent inward at 45° relative to the ends of the first and fourth flip plates, respectively.

[0008] Furthermore, when the four-section folding hinge structure is connected end to end and closed, the first, second, third, and fourth flip plates close together to form a square frame structure.

[0009] Furthermore, the first flip plate bending portion and / or the fourth flip plate bending portion are provided with magnetic components for generating magnetic attraction.

[0010] Furthermore, the outer walls of the first, second, third, and fourth flip plates are provided with lock hole structures for bolting to the support frame of the folding chair or welded rib structures for welding to fix the support frame of the folding chair.

[0011] Furthermore, the support frame is formed by bending steel pipes in one piece.

[0012] Based on the same inventive concept, this utility model also provides a folding chair support frame, including four support frames and any of the above-described intermediate connecting mechanisms. The four support frames are respectively fixedly connected to the outer walls of the first flip plate, the second flip plate, the third flip plate, and the fourth flip plate, so that when the intermediate connecting mechanism is unfolded, the four support frames are configured to stack together to form a folded storage state as the intermediate connecting mechanism unfolds. When the intermediate connecting mechanism is switched to the closed state, the four support frames are configured to separate and open with the closing action of the intermediate connecting mechanism to form a use state.

[0013] Based on the same inventive concept, this utility model also provides a folding chair, including a supporting fabric and any of the above-mentioned folding chair support frames. When the folding chair support frame is opened to form a use state, the four corners of the supporting fabric are respectively connected to the support tops of the four support frames.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] In the intermediate connecting mechanism, folding chair support frame, and folding chair described in this utility model, the intermediate connecting mechanism consists of a first flip plate, a second flip plate, a third flip plate, and a fourth flip plate hinged together to form a four-segment folding structure. The four support frames to be assembled in the folding chair are respectively connected to the connecting parts of the first flip plate, the second flip plate, the third flip plate, and the fourth flip plate. Thus, the flipping and opening or closing action of the four-segment folding hinge structure drives the four support frames to open into a usable state or fold into a folded state. The overall structure of this intermediate connecting mechanism is simple and practical, and the opening and closing operations are quick, convenient, and efficient, which helps to reduce production costs and improve the product's market competitiveness. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the folding chair support frame in use according to Embodiment 1 of this utility model.

[0017] Figure 2 This is a schematic diagram of the folding state of the folding chair support frame according to Embodiment 1 of this utility model.

[0018] Figure 3 This is a three-dimensional structural diagram of the intermediate connecting mechanism of Embodiment 1 of this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the intermediate connecting mechanism in Embodiment 2 of this utility model.

[0020] Label Explanation:

[0021] 1. First flip plate, 2. Second flip plate, 3. Third flip plate, 4. Fourth flip plate, 5. Support frame, 6. Magnetic component, 11. Bending part of the first flip plate, 41. Bending part of the fourth flip plate. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0024] Example 1

[0025] Please refer to the appendix. Figure 1 To be continued Figure 3One embodiment of this utility model provides an intermediate connecting mechanism applied in a folding chair, including a first flip plate 1, a second flip plate 2, a third flip plate 3, and a fourth flip plate 4. The first flip plate 1 and the second flip plate 2, the second flip plate 2 and the third flip plate 3, and the third flip plate 3 and the fourth flip plate 4 are hinged to form a four-segment folding structure. The first flip plate 1, the second flip plate 2, the third flip plate 3, and the fourth flip plate 4 are respectively provided with connecting parts for connecting with the support frame 5 of the folding chair. The four-segment folding structure is configured to be able to be laid flat to form an unfolded state or to be connected end to end to form a square frame-shaped closed state. It is understood that in this embodiment, the intermediate connecting mechanism is formed by hinged first flip plate 1, second flip plate 2, third flip plate 3 and fourth flip plate 4 to form a four-segment folding structure. The four support frames 5 to be assembled on the folding chair are respectively connected to the connecting parts of the first flip plate 1, second flip plate 2, third flip plate 3 and fourth flip plate 4. In this way, the flipping and opening or closing action of the four-segment folding hinge structure drives the four support frames 5 to open to form a working state or to fold to form a folded state. The overall structure of this intermediate connecting mechanism is simple and practical, and the opening and closing operation is quick, convenient and efficient, which helps to reduce production costs and improve the product's market competitiveness.

[0026] Please refer to the appendix. Figure 1 To be continued Figure 3 In one preferred embodiment, the free ends of the first flip plate 1 and the fourth flip plate 4 are respectively formed with a first flip plate bending portion 11 and a fourth flip plate bending portion 41. When the four-segment folding hinge structure is closed end to end to form a square frame, the first flip plate bending portion 11 and the fourth flip plate bending portion 41 abut against each other to form a limit, so that the four-segment folding hinge structure remains in a square frame shape. In one preferred embodiment, preferably, the first flip plate bending portion 11 and the fourth flip plate bending portion 41 are bent inward at 45° relative to the ends of the first flip plate 1 and the fourth flip plate 4, respectively. In this embodiment, by configuring the first flip plate bending portion 11 and the fourth flip plate bending portion 41 to be bent inward at 45° relative to the ends of the first flip plate 1 and the fourth flip plate 4, it can be ensured that the four-segment folding hinge structure can stably maintain a square frame structure when closed without excessive folding and deformation. In one preferred embodiment, when the four-section folding hinge structure is closed end to end, the first flip plate 1, the second flip plate 2, the third flip plate 3, and the fourth flip plate 4 close to form a square frame structure. This allows the four support frames 5, respectively connected to the first flip plate 1, the second flip plate 2, the third flip plate 3, and the fourth flip plate 4, to open evenly at 90° intervals, thereby improving the support stability of the support frames 5 after opening.

[0027] Please refer to the appendix. Figure 1 To be continued Figure 3 In one preferred embodiment, the outer walls of the first flip plate 1, the second flip plate 2, the third flip plate 3, and the fourth flip plate 4 are each provided with a locking hole structure for bolting to the support frame 5 of the folding chair or a welded rib structure for welding to the support frame 5 of the folding chair. The locking hole structure or the welded rib structure forms a connection part for connecting with the support frame 5. In one preferred embodiment, preferably, the support frame 5 is integrally bent from a steel pipe.

[0028] Please refer to the appendix. Figure 1 To be continued Figure 3 An embodiment of this utility model also provides a folding chair support frame, including four support frames 5 and any one of the above intermediate connecting mechanisms. The four support frames 5 are fixedly connected to the outer side walls of the first flip plate 1, the second flip plate 2, the third flip plate 3 and the fourth flip plate 4, respectively. When the intermediate connecting mechanism is unfolded, the four support frames are configured to stack together to form a folded storage state as the intermediate connecting mechanism unfolds. When the intermediate connecting mechanism is switched to the closed state, the four support frames 5 are configured to separate and open with the closing action of the intermediate connecting mechanism to form a use state.

[0029] Please refer to the appendix. Figure 1 To be continued Figure 3 An embodiment of this utility model also provides a folding chair, including a supporting fabric and any of the above-described folding chair support frames. When the folding chair support frame is opened to form a usage state, the four corners of the supporting fabric are respectively connected to the support tops of the four support frames.

[0030] Example 2

[0031] Please refer to the appendix. Figure 4 The difference between this embodiment and Embodiment 1 is that the first flip plate bending portion 11 and / or the fourth flip plate bending portion 41 are provided with magnetic elements 6 for generating a magnetic attraction. In this embodiment, magnetic elements 6 can be provided on both the first flip plate bending portion 11 and the fourth flip plate bending portion 41. The magnetic elements 6 can be neodymium iron boron permanent magnet structures. Utilizing the magnetic attraction between the two magnetic elements 6 respectively provided on the first flip plate bending portion 11 and the fourth flip plate bending portion 41, the intermediate connecting mechanism can be stably maintained in a closed state when unfolded, which is beneficial for installing the support fabric. In addition, in other embodiments, magnetic elements 6 can also be provided on either the first flip plate bending portion 11 or the fourth flip plate bending portion 41, and the magnetic element 6 can be provided on the contact surface of the bending portion or on the side opposite to the contact surface.

[0032] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. An intermediate connecting mechanism applied to a folding chair, characterized in that: The four-turn folding hinge folding structure is formed by the first turning plate (1), the second turning plate (2), the third turning plate (3) and the fourth turning plate (4) which are hingedly connected, and the first turning plate (1), the second turning plate (2), the third turning plate (3) and the fourth turning plate (4) are respectively provided with connecting portions for connecting with the support frame (5) of the folding chair, and the four-turn folding hinge folding structure is configured to be flatly unfolded to form an unfolded state or connected at the head and tail to form a square box-shaped folded state.

2. The intermediate connection mechanism of claim 1, wherein: The free ends of the first turning plate (1) and the fourth turning plate (4) are respectively provided with the first turning plate bending portion (11) and the fourth turning plate bending portion (41), and when the four-turn folding hinge folding structure is connected at the head and tail to form a square box shape, the first turning plate bending portion (11) and the fourth turning plate bending portion (41) are in contact with each other to form a limit to keep the four-turn folding hinge folding structure in a square box shape.

3. The intermediate connection mechanism of claim 2, wherein: The first turning plate bending portion (11) and the fourth turning plate bending portion (41) are respectively bent inward by 45° relative to the ends of the first turning plate (1) and the fourth turning plate (4).

4. The intermediate connection mechanism of claim 2, wherein: When the four-turn folding hinge folding structure is connected at the head and tail, the first turning plate (1), the second turning plate (2), the third turning plate (3) and the fourth turning plate (4) are folded to form a square box-shaped structure.

5. The intermediate connection mechanism of claim 2, wherein: The first turning plate bending portion (11) and / or the fourth turning plate bending portion (41) are provided with a magnetic member (6) for generating magnetic attraction.

6. The intermediate connection mechanism of claim 1, wherein: The outer side walls of the first turning plate (1), the second turning plate (2), the third turning plate (3) and the fourth turning plate (4) are respectively provided with a locking hole structure for bolt locking with the support frame (5) of the folding chair or a welding protruding rib structure for welding fixation with the support frame (5) of the folding chair.

7. The intermediate connection mechanism of claim 1, wherein: The support frame (5) is integrally bent and formed by a steel pipe.

8. A folding chair support framework, characterized by: The four support frames (5) and the intermediate connecting mechanism according to any one of claims 1 to 7 are fixedly connected with the outer side walls of the first turning plate (1), the second turning plate (2), the third turning plate (3) and the fourth turning plate (4), so that when the intermediate connecting mechanism is flatly unfolded, the four support frames are configured to be stacked together to form a folded storage state with the unfolding action of the intermediate connecting mechanism, and when the intermediate connecting mechanism is switched to the folded state, the four support frames (5) are configured to be separated from each other to form a use state with the folding action of the intermediate connecting mechanism.

9. A folding chair characterized by: The folding chair support framework according to claim 8 and the support cloth are connected at the support top ends of the four support frames when the folding chair support framework is opened to form a use state.

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