WO2024078220A1

WO2024078220A1 - Collapsible chair frame and collapsible chair

Info

Publication number: WO2024078220A1
Application number: PCT/CN2023/117707
Authority: WO
Inventors: 杨宝庆
Original assignee: 浙江泰普森实业集团有限公司
Priority date: 2022-10-14
Filing date: 2023-09-08
Publication date: 2024-04-18
Also published as: CN218852270U

Abstract

The present application relates to a collapsible chair. Each front leg pipe is provided with a pivoting seat; connecting rod assemblies in the chair frame are connected to the front leg pipes by means of the pivoting seats; a first end of each pivoting seat is pivotally connected to the corresponding front leg pipe; the joint of each connecting rod assembly and each pivoting seat is located at a second end of the pivoting seat; when the chair frame is in an uncollapsed state, the second ends of the pivoting seats are locked above the first ends of the pivoting seats; when the chair frame is switched to a collapsed state, the second ends of the pivoting seats move downwards relative to the first ends. The present application further provides a collapsible chair having the chair frame. Due to the use of the solution, the connecting positions of the connecting rod assemblies and the front leg pipes can be moved, such that the height of the chair frame in the collapsed state can be shortened.

Description

Folding chair frame and folding chair

Technical Field

The invention relates to the field of outdoor products, and in particular to a folding chair frame and a folding chair.

Background technique

A common type of folding chair on the market is a structure that switches between a folded state and an unfolded state by linking the supporting tubes that make up the chair frame. This structure can achieve rapid unfolding or folding of the folding chair. For the convenience of description, the folding chair with this structure is referred to as a bundle-type folding chair in the following text. The height of the bundle-type folding chairs on the market after folding is basically around 90CM, and due to the height limit after folding, the backrest is generally short, the back support is insufficient, and the comfort level is not high.

Summary of the invention

In order to solve the above problems, the present invention aims to provide a folding chair frame, which adopts a new folding structure and can reduce the height after folding. The present invention also aims to provide a folding chair having the folding chair frame.

In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

A folding chair frame capable of switching between an unfolded state and a folded state, the chair frame comprising a seat tube (5), a front leg tube (1), a rear leg tube (7) and a connecting rod assembly, each front leg tube (1) being provided with a pivot seat (2), the connecting rod assembly in the chair frame being connected to the front leg tube (1) via the pivot seat (2), the first end of the pivot seat (2) being pivotally connected to the corresponding front leg tube (1), the connection between the connecting rod assembly and the pivot seat (2) being located at the second end of the pivot seat (2); in the unfolded state of the chair frame, the second end of the pivot seat (2) is locked above the first end thereof; when the chair frame is switched to the folded state, the second end of the pivot seat (2) moves downward relative to the first end.

Preferably, the second end of the pivot seat (2) forms a locking opening in the direction of the corresponding front leg tube (1), and the front leg tube (1) is embedded in the locking opening when the chair frame is in the unfolded state. When the chair frame is switched to the folded state, the front leg tube (2) is released from the locking opening, and the second end of the pivot seat (2) rotates downward with its first end as the rotation center.

Preferably, the upper ends of the front leg tube (1) and the rear leg tube (7) in the chair frame are rotatably connected to the seat tube (5) on the same side, and the connecting rod assembly comprises a leg tube connecting rod (3), one end of the leg tube connecting rod (3) is hinged to the second end of the pivot seat (2), and the other end of the leg tube connecting rod (3) is hinged to the rear leg tube (7) on the same side.

Preferably, the connecting rod assembly comprises a front cross tube (15), the front cross tube (15) comprising a group of front diagonal bracing tubes which are cross-arranged and hinged to each other, the upper end of the front cross tube (15) is hinged to the seat tube (5), and the lower end of the front cross tube (15) is hinged to the second end of the pivot seat (2).

Preferably, the chair frame further comprises a rear cross tube (16), the rear cross tube comprising a group of rear diagonal bracing tubes which are cross-arranged and hinged to each other, the upper end of the rear cross tube being hinged to the rear end of the seat tube (5), and the lower end of the rear cross tube being hinged to the rear foot tube (7).

Preferably, the chair frame further comprises a backrest tube (12), the backrest tube (12) being connected to the seat tube (5) via a backrest tube connector (11), the backrest tube connector (11) being fixed to the rear end of the seat tube (5), the backrest tube (12) being hinged to the backrest tube connector (11), and the backrest tube connector (11) providing rearward limiting.

Preferably, the chair frame further comprises an armrest tube (10), and the connecting rod assembly further comprises a support tube (4), the rear end of the armrest tube (10) is hinged to the backrest tube (12) on the same side, the upper end of the support tube (4) is slidably connected to the armrest tube (10), and the lower end of the support tube (4) is hinged to the second end of the pivot seat (2).

Preferably, a support tube sliding sleeve (6) is sleeved on the support tube (4), the support tube sliding sleeve (6) is hinged to the seat tube (5), and the support tube (4) can move relative to the support tube sliding sleeve (6) along its axial direction.

Preferably, two hinged cross bracing tubes (13) and a locking member (14) for locking the two cross bracing tubes (13) in an unfolded state are provided between the two backrest tubes (12).

The present application also provides a folding chair, comprising a folding chair frame as described in any of the above items.

The present invention adopts the above-mentioned technical solution, and a pivot seat is set on the folding chair frame. The connecting rod assembly connected to the front leg tube is connected to the second end of the pivot seat, so that the connection position of the connecting rod assembly and the front leg tube can be moved when the folding chair frame is in the unfolded state and the folded state. Specifically, it is located below the connection point in the unfolded state relative to the front leg tube in the folded state, which is beneficial to shorten the height of the chair frame in the folded state.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of an embodiment of the present application in an unfolded state;

FIG2 is a schematic diagram of a middle folded state of an embodiment of the present application;

FIG. 3 is a schematic diagram of the folded state of an embodiment of the present application.

Reference numerals:

Front leg tube 1, pivot seat 2, leg tube connecting rod 3, support tube 4, seat tube 5, support tube sliding sleeve 6, rear leg tube 7, seat tube connecting piece 8, armrest tube sliding sleeve 9, armrest tube 10, backrest tube connecting piece 11, backrest tube 12, cross bracing tube 13, locking piece 14, front cross tube 15, rear cross tube 16.

Implementation

Embodiments of the present disclosure are described in detail below.

In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Unless otherwise specified, "plurality" means two or more, unless otherwise explicitly specified.

Example 1

The present embodiment discloses a folding chair frame. As shown in Fig. 1-3, the folding chair frame can be switched between an unfolded state and a folded state, and the chair frame includes a seat tube 5, a front leg tube 1, a rear leg tube 7 and a connecting rod assembly, each front leg tube 1 is provided with a pivot seat 2, and the connecting rod assembly in the chair frame is connected to the front leg tube 1 through the pivot seat 2, the first end of the pivot seat 2 is pivotally connected to the corresponding front leg tube 1, and the connection between the connecting rod assembly and the pivot seat 2 is located at the second end of the pivot seat 2; the second end of the pivot seat 2 forms a locking opening toward the direction of the corresponding front leg tube 1, and the front leg tube 1 is embedded in the locking opening when the chair frame is in the unfolded state, and the second end is located above the first end at this time; when the chair frame is in the folded state, the front leg tube 1 is out of the locking opening, and the second end moves downward relative to the first end.

The above-mentioned folding chair frame is provided with a pivot seat 2, and the connecting rod assembly connected to the front leg tube 1 is connected to the second end of the pivot seat 2, so that the connection position of the connecting rod assembly and the front leg tube 1 can be moved when the folding chair frame is in the unfolded state and the folded state, specifically, it is located below the connection position in the unfolded state relative to the front leg tube 1 in the folded state, thereby facilitating shortening the height of the chair frame in the folded state.

The upper ends of the front leg tube 1 and the rear leg tube 7 in the chair frame are rotatably connected to the seat tube 5 on the same side, and the connecting rod assembly includes a leg tube connecting rod 3, one end of the leg tube connecting rod 3 is hinged to the second end of the pivot seat 2, and the other end of the leg tube connecting rod 3 is hinged to the rear leg tube 7 on the same side. The plane on which the front leg tube 1 and the rear leg tube 7 on the same side rotate relative to each other is parallel to the plane on which the second end of the pivot seat 2 rotates around its first end. In the embodiment, a seat tube connector 8 is fixed to the seat tube 5, and the upper ends of the front leg tube 1 and the rear leg tube 7 are hinged to the seat tube connector 8. The seat tube connector 8 is provided to facilitate the connection between the front leg tube 1, the rear leg tube 7 and the seat post.

The folding chair frame of the above structure includes a pivot seat 2, which is arranged on the front leg tube 1. A connecting rod is arranged between the front leg tube 1 and the rear leg tube 7. When the chair frame is in the unfolded state, when in use, the seat tube 5 is subjected to downward pressure, which is transmitted to the connecting rod, and the connecting rod applies a backward pulling force to the pivot seat 2, so that the front leg tube 1 is against the locking mouth, and the front leg tube 1, the rear leg tube 7 and the connecting rod form a triangular stable state. When folding, the pivot seat 2 is rotated to make the front leg tube 1 escape from the locking mouth, and at the same time, the second end of the pivot seat 2 drives the connecting rod, and the connecting rod drives the rear leg tube 7 to approach the front leg tube 1, and the front leg tube 1 and the rear leg tube 7 are retracted toward the seat tube 5. Since the upper ends of the front leg tube 1 and the rear leg tube 7 are connected to the seat tube 5, the length of the front leg tube 1 and the rear leg tube 7 required to provide the same use height is shorter than that of other structures in the prior art, which is conducive to shortening the folding height of the chair frame, and the front leg tube 1 and the rear leg tube 7 are quickly switched between the unfolded state and the folded state through the linkage cooperation of the pivot seat 2 and the connecting rod.

The connecting rod assembly includes a front cross tube 15, which includes a group of front diagonal bracing tubes that are cross-arranged and hinged to each other. The upper end of the front cross tube 15 is hinged to the seat tube 5, and the lower end of the front cross tube 15 is hinged to the second end of the pivot seat 2. The front cross tube 15 can provide oblique support when the folding chair frame is in the unfolded state to prevent the front leg tubes 1 from being relatively close together and deformed during use, which affects the normal use of the folding chair. The lower end of the front cross tube 15 is hinged to the second end of the pivot seat 2. When folding is required, the second end of the pivot seat 2 drives the front cross tube 15 to move downward while closing together. The above arrangement makes the connection position of the front cross tube 15 with the front leg tube 1 movable in the folded state and the unfolded state, which is beneficial to reducing the height of the chair frame in the folded state.

The chair frame also includes a rear cross tube 16. The front cross tube 15 and the rear cross tube 16 are provided to provide oblique support from the front and rear sides of the chair frame, respectively, which is conducive to enhancing the overall strength of the chair frame. The rear cross tube includes a group of rear diagonal support tubes that are cross-arranged and hinged to each other. The upper end of the rear cross tube is hinged to the rear end of the seat tube 5, and the lower end of the rear cross tube is hinged to the rear leg tube 7. The connection between the rear cross tube and the rear leg tube 7 is arranged near the lower end of the rear leg tube 7. Through the above structure, the linkage between the rear cross tube, the seat tube 5 and the rear leg tube 7 can be achieved.

The chair frame further includes a backrest tube 12, which is connected to the seat tube 5 via a backrest tube connector 11, which is fixed to the rear end of the seat tube 5, and the backrest tube is hinged on the backrest tube connector 11, and the backrest tube connector 11 provides a rear limit. Thus, the backrest tube can be opened backward or folded forward relative to the seat tube 5, and in the unfolded state, the backrest tube connector 11 provides a rear limit to keep the backrest tube in the unfolded state.

The chair frame also includes an armrest tube 10, and the connecting rod assembly also includes a support tube 4. The rear end of the armrest tube 10 is hinged on the backrest tube on the same side, the upper end of the support tube 4 is slidably connected to the armrest tube 10, and the lower end of the support tube 4 is hinged to the second end of the pivot seat 2. Therefore, in the unfolded state, the support tube 4 can be supported by the front leg tube 1, thereby providing support from below to the armrest tube 10. In the embodiment, the support tube 4 and the armrest tube 10 are connected by an armrest tube sliding sleeve 9 that can slide along the axial direction of the armrest tube 10. Since the second end of the pivot seat 2 is a movable connection point, the upper end of the support tube is adaptively set to slide on the armrest tube 10 to adjust the connection position of the support tube on the armrest tube 10 in the folded state and the unfolded state, so that the pivot seat 2, the support tube and the armrest tube 10 can be smoothly linked to be folded or unfolded. The armrest tube 10 is hinged to the backrest tube, so that the linkage from the pivot seat 2 to the support tube to the armrest tube 10 to the backrest tube can be realized, which is convenient to operate.

Preferably, in order to limit the sliding range of the upper end of the support tube 4 along the handrail tube 10 and keep the upper end of the support tube 4 connected to the handrail tube 10, a support tube sliding sleeve 6 is sleeved on the support tube 4, and the support tube sliding sleeve 6 is hinged to the seat tube 5. When switching between the unfolded state and the folded state, the support tube moves relative to the support tube sliding sleeve 6 along its axial direction.

Preferably, two hinged cross bracing tubes 13 and locking members 14 for locking the two cross bracing tubes 13 in the unfolded state are provided between the two backrest tubes. In the embodiment, the relatively far ends of the cross bracing tubes 13 are respectively hinged to the backrest tubes on the corresponding side, and the relatively close ends of the cross bracing tubes 13 are connected through the locking members 14. The structure of the cross bracing tubes 13 and the locking members 14 can adopt the structure of the backrest support tube and the lock buckle in the publication number CN216702063U, which will not be described in detail here.

Since the present embodiment adopts the above structure, the various pipes constituting the chair frame are linked to each other, and the switch between the unfolded state and the folded state can be realized quickly. The connecting rod assembly is connected to the front leg tube 1 through the pivot seat 2. By flipping the pivot seat 2, the connection position between the connecting rod assembly and the pivot seat 2 can be moved downward in the folded state, thereby effectively reducing the height of the chair frame in the folded state, which is convenient for storage and transportation. Through the above structure, the folding height can be made to 70CM, which is the minimum height on the market. And compared with the folding chairs in the prior art, the backrest can be made higher at the same folding height, which can improve the comfort of use.

Example 2

This embodiment provides a folding chair, which includes a folding chair frame as shown in Embodiment 1.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application without departing from the principles and purpose of the present application.

Claims

A folding chair frame capable of switching between an unfolded state and a folded state, the chair frame comprising a seat tube (5), a front leg tube (1), a rear leg tube (7) and a connecting rod assembly, characterized in that each front leg tube (1) is provided with a pivot seat (2), the connecting rod assembly in the chair frame is connected to the front leg tube (1) via the pivot seat (2), the first end of the pivot seat (2) is pivotally connected to the corresponding front leg tube (1), and the connection between the connecting rod assembly and the pivot seat (2) is located at the second end of the pivot seat (2); in the unfolded state of the chair frame, the second end of the pivot seat (2) is locked above its first end; when the chair frame is switched to the folded state, the second end of the pivot seat (2) moves downward relative to the first end.
A folding chair frame according to claim 1, characterized in that the second end of the pivot seat (2) forms a locking opening in the direction of its corresponding front leg tube (1), and the front leg tube (1) is embedded in the locking opening when the chair frame is in the unfolded state. When the chair frame is switched to the folded state, the front leg tube (2) escapes from the locking opening, and the second end of the pivot seat (2) rotates downward with its first end as the rotation center.
A folding chair frame according to claim 1, characterized in that the upper ends of the front leg tube (1) and the rear leg tube (7) in the chair frame are rotatably connected to the seat tube (5) on the same side, and the connecting rod assembly includes a leg tube connecting rod (3), one end of the leg tube connecting rod (3) is hinged to the second end of the pivot seat (2), and the other end of the leg tube connecting rod (3) is hinged to the rear leg tube (7) on the same side.
A folding chair frame according to claim 1, characterized in that the connecting rod assembly includes a front cross tube (15), the front cross tube (15) includes a group of front diagonal bracing tubes that are cross-arranged and hinged to each other, the upper end of the front cross tube (15) is hinged to the seat tube (5), and the lower end of the front cross tube (15) is hinged to the second end of the pivot seat (2).
A folding chair frame according to claim 1, characterized in that the chair frame also includes a rear cross tube (16), the rear cross tube includes a group of rear diagonal bracing tubes that are cross-arranged and hinged to each other, the upper end of the rear cross tube is hinged to the rear end of the seat tube (5), and the lower end of the rear cross tube is hinged to the rear foot tube (7).
A folding chair frame according to claim 1, characterized in that the chair frame also includes a backrest tube (12), the backrest tube (12) is connected to the seat tube (5) through a backrest tube connector (11), the backrest tube connector (11) is fixed to the rear end of the seat tube (5), the backrest tube (12) is hinged on the backrest tube connector (11), and the backrest tube connector (11) provides rear side limitation.
A folding chair frame according to claim 6, characterized in that the chair frame also includes an armrest tube (10), the connecting rod assembly also includes a support tube (4), the rear end of the armrest tube (10) is hinged to the backrest tube (12) on the same side, the upper end of the support tube (4) is slidably connected to the armrest tube (10), and the lower end of the support tube (4) is hinged to the second end of the pivot seat (2).
A folding chair frame according to claim 7, characterized in that a support tube sliding sleeve (6) is sleeved on the support tube (4), the support tube sliding sleeve (6) is hinged to the seat tube (5), and the support tube (4) can move along its axial direction relative to the support tube sliding sleeve (6).
A folding chair frame according to claim 6, characterized in that two hinged cross bracing tubes (13) and a locking member (14) for locking the two cross bracing tubes (13) in the unfolded state are provided between the two backrest tubes (12).
A folding chair, characterized in that it comprises a folding chair frame as described in any one of claims 1-9.