Folding chair frame and folding chair

Abstract

This application relates to the field of seating, and more particularly to a folding chair frame and a folding chair. The chair frame includes two legs arranged laterally opposite each other, a support frame hinged between the two legs and capable of lateral extension and retraction, and a locking mechanism for locking the chair frame when it is unfolded. The support frame includes two cross rods that are sequentially hinged laterally. The two ends of the two cross rods on the side closer to each other are hinged to each other. Of the two ends of the two cross rods on the side farther from each other, the upper one is hinged to the legs at a first hinge point, and the lower one is hinged to the first end of a linkage rod. The second end of the linkage rod is hinged to the legs at a second hinge point, and the second hinge point is lower than the first hinge point. Compared to the existing single cross rod method, this application can better accommodate some folding chairs with low seat heights.

Description

Technical Field

[0001] This application relates to the field of seating, and more particularly to a folding chair frame and a folding chair. Background Technology

[0002] With the development of technology, in order to facilitate carrying and transportation, some chair frames are designed to be foldable, such as director chairs.

[0003] Among the related technologies, some folding chair frames mainly rely on linkage mechanisms to realize the unfolding and folding of the chair frame, such as the folding chair disclosed in the patent document with publication number CN222737557U.

[0004] However, the aforementioned folding chair is difficult to meet the design requirement of a low seat height (i.e., a low seat height). Specifically, this type of folding chair mainly relies on a cross-link formed by two support rods between the two legs for support. If the seat height is designed to be lower while keeping the seat width unchanged, the support rods will be too long, causing the lower end of the support rods to extend downwards into the legs when the chair is folded. This increases the height of the folding chair when folded, which is not conducive to packaging and transportation, and therefore needs to be improved. Utility Model Content

[0005] In order to solve at least one of the technical problems mentioned in the background art, the purpose of this application is to provide a folding chair frame and a folding chair.

[0006] To achieve the above objectives, this application provides the following technical solution.

[0007] On one hand, this application provides a folding chair frame, including two legs arranged laterally opposite each other, a support frame hinged between the two legs and capable of lateral extension and retraction, and a locking mechanism for locking the chair frame when it is unfolded. The support frame includes two cross rods that are sequentially hinged laterally. The two ends of the two cross rods that are close to each other are hinged to each other. Of the two ends of the two cross rods that are far apart from each other, the one on the upper side is hinged to the legs at a first hinge point, and the one on the lower side is hinged to the first end of a linkage rod. The second end of the linkage rod is hinged to the legs at a second hinge point, and the second hinge point is lower than the first hinge point.

[0008] As an optional embodiment of this application, the crossbar is X-shaped and includes a first rod and a second rod that are hinged together at the middle of a third hinge point; in the two crossbars, the first ends of the two first rods are hinged together, the second ends of the two first rods are respectively hinged to the two legs to form a second hinge point, the first ends of the two second rods are hinged together, and the second ends of the two linkage rods are respectively hinged to the two legs.

[0009] As an optional embodiment of this application, the locking mechanism includes two locking members, which are respectively hinged to two cross rods at a third hinge point. Each locking member includes a self-locking end, and the bottoms of the self-locking ends of the two locking members are hinged to each other so that when the folding chair frame is in the unfolded state, the self-locking ends of the two locking rods abut against each other to form a self-lock.

[0010] As an optional embodiment of this application, the support frame includes two sets, which are arranged opposite each other along the longitudinal direction. The locking member is located between the two support frames. The locking member includes two third rods and a fourth rod extending along the longitudinal direction. The two third rods are respectively fixed to both ends of the fourth rod to form a U-shaped rod structure. The third rod and the adjacent cross rod are hinged at a third hinge point. The end of the third rod away from the fourth rod forms the self-locking end.

[0011] As an optional embodiment of this application, the frame includes two columns arranged opposite each other along the longitudinal direction, and the support frame is hinged to the columns; the two columns are fixed together by one or more crossbeams, wherein at least one crossbeam is located at the top of the column and extends longitudinally to form a seat rod for mounting the seat surface of the folding chair.

[0012] As an optional embodiment of this application, the length of the tripod in the vertical direction is adjustable.

[0013] As an optional embodiment of this application, the tripod includes two columns arranged opposite each other along the longitudinal direction; each column includes two first pipe segments and second pipe segments that can extend and retract relative to each other along the length direction of the column; the column also includes a locking mechanism disposed between the first pipe segments and the second pipe segments for locking the relative position of the first pipe segments and the second pipe segments.

[0014] As an optional embodiment of this application, the first pipe segment and the second pipe segment are interlocked, so that the first pipe segment and the second pipe segment can move and extend relative to each other along the length direction of the column.

[0015] As an optional embodiment of this application, the folding chair frame further includes an armrest frame, which is mounted on the legs and is foldable or unfoldable relative to the legs; and / or the folding chair frame further includes a backrest frame, which is foldable or unfoldable relative to the legs.

[0016] On the other hand, this application also provides a folding chair, including a folding chair frame and a flexible chair surface mounted on the folding chair frame, wherein the folding chair frame adopts the above-mentioned folding chair frame.

[0017] Compared with the prior art, this application has the following advantages:

[0018] In this application, the support frame for laterally supporting the unfolded tripod is composed of two cross rods and two linkage rods, rather than the existing technology which generally uses only one cross rod for support. Compared with the single cross rod method in the prior art, with the same seat width, the support frame in this application extends downwards for a shorter length after folding. This can also be understood as the lower end of the support frame moving downwards a shorter distance in the folded state. This avoids the problem that the height of the entire chair frame increases in the folded state due to the support frame extending downwards too far. It can be seen that this application can be adapted to some folding chairs with low seat height (i.e., low seat height).

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0020] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, in which:

[0021] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0022] Figure 1 This shows a schematic diagram of the folding chair frame provided in Embodiment 1 of this application in its unfolded state;

[0023] Figure 2 It shows Figure 1 The main view;

[0024] Figure 3 A schematic diagram of the folding chair frame provided in Embodiment 1 during the folding process is shown. Figure 1 ;

[0025] Figure 4 A schematic diagram of the folding chair frame provided in Embodiment 1 during the folding process is shown. Figure 2 ;

[0026] Figure 5 A schematic diagram of the folding chair frame provided in Embodiment 1 during the folding process is shown. Figure 3 ;

[0027] Figure 6 A schematic diagram of the folding chair frame provided in Embodiment 1 during the folding process is shown. Figure 4 ;

[0028] Figure 7 An exploded view of the legs of the folding chair frame provided in Embodiment 1 is shown;

[0029] Figure 8 This diagram illustrates the structure of a folding chair using the folding chair frame provided in Example 1, as shown in Example 3. Figure 1 ;

[0030] Figure 9 This diagram illustrates the structure of a folding chair using the folding chair frame provided in Example 1, as shown in Example 3. Figure 2 ;

[0031] Figure 10 A schematic diagram of the structure of a folding chair using the folding chair frame provided in Example 2 is shown in Example 3.

[0032] Explanation of the labels in the diagram:

[0033] L1, Lateral; L2, Longitudinal; J1, First hinge point; J2, Second hinge point; J3, Third hinge point;

[0034] 1. Leg; 11. Upright; 111. First tube section; 112. Second tube section; 1121. Pin hole; 113. Locking element; 113. Button; 115. Crossbeam; 116. Base pole;

[0035] 2. Support frame; 21. Crossbar; 211. First rod; 212. Second rod; 22. Linkage rod;

[0036] 3. Locking mechanism; 31. Locking component; 311. Third rod; 314. Fourth rod; 315. Hinge joint;

[0037] 4. Handrail frame;

[0038] 5. Backrest bar;

[0039] 6. Chair surface; 61. Seat surface; 62. Backrest; Detailed Implementation

[0040] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Example 1

[0042] Reference Figures 1-7 As shown, this embodiment provides a folding chair frame (hereinafter referred to as the chair frame), which can be used for folding chairs. The folding chair frame provided in this embodiment mainly includes a leg frame 1, a support frame 2, and a locking mechanism 3.

[0043] like Figure 1 As shown, two tripods 1 are provided, and the two tripods 1 are arranged opposite each other in the lateral direction. The support frame 2 is hinged between the two tripods 1, and the support frame 2 can extend and retract in the lateral direction to realize unfolding and folding.

[0044] In this embodiment, "horizontal" can be understood as the width direction of the chair frame when it is unfolded (or the left-right direction of the chair frame). Accordingly, for ease of understanding, in this embodiment, the direction perpendicular to the horizontal direction is designated as the longitudinal direction, i.e., the front-back direction of the chair frame. Figure 1 In the diagram, L1 represents the horizontal direction, and L2 represents the vertical direction.

[0045] Preferably, two sets of support frames 2 are provided, and the two sets of support frames 2 are arranged opposite each other in the longitudinal direction. That is, the two support frames 2 are arranged one in front of the other and one behind the other, respectively between the two legs 1, and are used to support the two legs 1 in the lateral direction when the chair frame is unfolded. The following embodiment uses the implementation of two sets of support frames 2 as an example for specific description.

[0046] In this embodiment, since the structures of the two support frames 2 are basically the same, for ease of explanation, only one of them will be used as an example for specific explanation below.

[0047] Combination Figure 2 As shown, the support frame 2 includes two cross rods 21 and two linkage rods 22 that are sequentially hinged laterally. The cross rods 21 are also called cross links, scissor links, or X-shaped links, etc., and they can rotate around their intersection points (or hinge points). Specifically:

[0048] Since the two cross rods 21 have basically the same structure, this embodiment will use one of them as an example for specific description: The cross rod 21 includes a first rod 211 and a second rod 212 that are hinged together in the middle. The hinge point of the first rod 211 and the second rod 212 is called the third hinge point J3. The axis of the third hinge point J3 is parallel to the horizontal and parallel to the longitudinal direction, so that the first rod 211 and the second rod 212 can be flipped relative to each other in the transverse direction around the third hinge point J3.

[0049] like Figure 2 As shown, in the two intersecting rods 21 of the same support frame 2:

[0050] The first ends of the two first rods 211 are hinged together around an axis that is horizontal and parallel to the longitudinal direction; the second ends of the two first rods 211 are respectively hinged to the two legs 1, wherein the hinge point between the second end of the first rod 211 and the leg 1 is denoted as the first hinge point J1, and the hinge axis of the first hinge point J1 is horizontal and parallel to the longitudinal direction; specifically, taking Figure 2Taking the shown viewpoint as an example, the first rod 211 on the left is hinged to the left leg 1, and the first rod 211 on the right is hinged to the right leg 1.

[0051] The first ends of the two second rods 212 are hinged together around an axis horizontally parallel to the longitudinal direction. The second ends of the two second rods 212 are respectively hinged to the first ends of the two linkage rods 22. The second ends of the two linkage rods 22 are respectively hinged to the two legs 1. The hinge point between the linkage rod 22 and the legs 1 is denoted as the second hinge point J2, and the hinge axis of the second hinge point J2 is horizontally parallel to the longitudinal direction. Specifically, taking... Figure 2 Taking the shown perspective as an example, the left end of the second rod 212 on the left is hinged to the right end of the linkage rod 22 on the left, the right end of the second rod 212 on the right is hinged to the left end of the linkage rod 22 on the right, the linkage rod 22 on the left is hinged to the left leg 1 at the second hinge point J2 on the left, and the linkage rod 22 on the right is hinged to the right leg 1 at the second hinge point J2 on the right.

[0052] The first hinge point J1 is located above the second hinge point J2, or in other words, the second hinge point J2 is lower than the first hinge point J1.

[0053] In short, each crossbar 21 will have two ends on both sides. Specifically, in this embodiment, in the same support frame 2, the two ends of the two crossbars 21 that are close to each other are hinged to each other. Of the two ends of the two crossbars 21 that are far apart from each other, the one on the upper side is hinged to the leg 1 at the first hinge point J1, and the one on the lower side is hinged to the first end of the linkage rod 22. The second end of the linkage rod 22 is hinged to the leg 1 at the second hinge point J2.

[0054] In this embodiment, the locking mechanism 3 is mainly used to lock the chair frame when it is unfolded, so that the chair frame remains unfolded when in use.

[0055] In this embodiment, as Figure 1 As shown, the support frame 2 used for lateral support of the unfolded bipod 1 is composed of two cross rods 21 and two linkage rods 22, rather than using only one cross rod 21 for support. Compared with the method of one cross rod 21, when the width of the seat surface 61 (i.e., the lateral length of the seat surface 61) is the same, the support frame 2 in this embodiment extends downwards for a shorter length after folding. It can also be understood that in the folded state, the lower end of the support frame 2 moves downwards for a shorter distance. This can avoid the problem that the height of the entire chair frame increases in the folded state due to the excessive downward extension distance of the support frame 2. It can be seen that this embodiment can adapt to some folding chairs with low seat height (i.e., the height of the seat surface 61 is relatively low).

[0056] In order to lock the chair frame after it is unfolded, this embodiment provides a specific locking mechanism 3, which includes two locking components 31 arranged sequentially in the horizontal direction.

[0057] like Figure 1 As shown, the two locking components 31 are respectively hinged to the two cross rods 21 in the same support frame 2 at the third hinge point J3, that is, the hinge axis of the locking component 31 and the cross rod 21 coincides with the hinge axis of the cross rod 21 itself (i.e. the third hinge point J3).

[0058] by Figure 2 Taking the shown viewpoint as an example, the left locking member 31 is hinged to the third hinge point J3 of the left cross bar 21, and the right locking member 31 is hinged to the third hinge point J3 of the right cross bar 21.

[0059] Furthermore, each of the locking components 31 includes a self-locking end, and the bottoms of the self-locking ends of the two locking components 31 are hinged together so that when the folding chair frame is in the unfolded state, the self-locking ends of the two locking rods abut against each other to form a self-lock. That is, as the chair frame gradually unfolds, the self-locking ends of the two locking rods will flip relative to each other, and eventually the self-locking ends of the two locking rods will abut against each other, as shown in the figure. Figure 1 In the state shown, the self-locking ends of the two locking levers can no longer rotate relative to each other in the current direction of rotation. This restricts the support frame 2 from extending and retracting laterally, thus locking the chair frame in the extended state.

[0060] In order to accommodate the locking of the two support frames 2, in some embodiments, the locking member 31 is located between the two support frames 2. The structures of the two locking members 31 are basically the same, so this embodiment will only use one of them as an example for explanation.

[0061] like Figure 1 As shown, the locking member 31 includes two third rods 311 and a fourth rod 314 extending longitudinally. The two third rods 311 are respectively fixed to both ends of the fourth rod 314 to form a U-shaped rod structure. Preferably, the locking member 31 is an integrally formed U-shaped rod structure to form the third rods 311 on both sides and the fourth rod 314 in the middle. In this way, when the chair frame is unfolded, it is equivalent to being locked by the two U-shaped rods.

[0062] The third rod 311 and the adjacent cross rod 21 are hinged at the third hinge point J3, that is, the two third rods 311 are respectively hinged at the third hinge point J3 of the cross rods 21 of the front and rear support frames 2.

[0063] The self-locking end is formed at the end of the third rod 311 away from the fourth rod 314. Specifically, a hinge joint 315 is fixed at the end of the third rod 311 away from the fourth rod 314. The lower parts of two adjacent hinge joints 315 are hinged to each other, and the hinge joints 315 constitute the self-locking end of the third rod 311.

[0064] This embodiment provides a specific tripod 1 structure. Since the structures of the two tripods 1 are basically the same, this embodiment will use one of them as an example for specific explanation.

[0065] like Figure 1 As shown, the frame 1 includes two uprights 11 arranged longitudinally opposite each other, and the uprights 11 extend basically vertically; the entire chair frame has a total of 4 uprights 11, two at the front and two at the back; the front support frame 2 is hinged between the two front uprights 11, and the rear support frame 2 is hinged between the two rear uprights 11.

[0066] The two uprights 11 are fixed together by one or more crossbeams 115, wherein at least one crossbeam 115 is located at the top of the uprights 11 and extends longitudinally to form a seat post 116 for mounting the seat surface 61 of the folding chair.

[0067] For example, such as Figure 1 As shown in the figure, this embodiment demonstrates the use of two crossbeams 115. Both crossbeams 115 extend longitudinally, and their ends are fixed to the two uprights 11 of the frame 1, respectively. One of the crossbeams 115 is located on the lower side, and the other is located on the top of the upright 11, serving as a seat rod 116. When installing the seat 61 of the folding chair, the left and right sides of the seat 61 are fixed to the two seat rods 116, respectively. (Refer to...) Figure 8 The state shown.

[0068] In some embodiments, the vertical length of the leg 1 is adjustable, so that the height of the leg 1 can be adjusted according to actual needs, thereby achieving the purpose of adjusting the height of the folding chair seat.

[0069] As a specific adjustable tripod 1, in some embodiments, such as Figure 1 and Figure 7 As shown, the column 11 includes two sections, a first pipe segment 111 and a second pipe segment 112, which are capable of relative extension and retraction along the length of the column 11. For example, the first pipe segment 111 and the second pipe segment 112 are interlocked to allow the first pipe segment 111 and the second pipe segment 112 to extend and retract relative to each other along the length of the column 11. Specifically, in this embodiment, as shown... Figure 1As shown, the support frame 2 is hinged to the first pipe section 111. The first pipe section 111 is hollow inside to form a slide for the first pipe section 111 to move through. The second pipe section 112 slides through the slide along the length of the column 11, so that the second pipe section 112 can be adjusted up and down relative to the first pipe section 111.

[0070] In addition, the column 11 also includes a locking mechanism disposed between the first pipe section 111 and the second pipe section 112 for locking the relative positions of the first pipe section 111 and the second pipe section 112.

[0071] In some embodiments, the locking mechanism can employ an existing spring pin and pin hole 1121 structure to achieve locking. Specifically, in this embodiment, for example... Figure 7 As shown, a locking member 113 is fixed at the lower end of the first pipe section 111. The locking member 113 is equipped with a spring pin (not shown in the figure due to perspective) and a button 113. Correspondingly, at least two pin holes 1121 are provided on the side wall of the second pipe section 112, arranged sequentially along the length of the second pipe section 112. The spring pin can be inserted into any one of the pin holes 1121. When the spring pin is inserted into the pin hole 1121, the first pipe section 111 and the second pipe section 112 are locked. Thus, one pin hole 1121 corresponds to one height position. The spring pin is controlled by the button 113. When the button 113 is pressed, the spring pin retracts from the pin hole 1121 to release the lock; when the button 113 is released, the spring pin can be inserted into the pin hole 1121 under its own elastic force to lock.

[0072] Of course, the locking mechanism can also be other structures that can achieve locking, as is available in the prior art.

[0073] In some other alternative implementations, such as Figure 1 As shown, the folding chair frame also includes armrests 4, which consist of two armrests, each hinged to the outer top of the two legs 1, so that the armrests 4 can be flipped, folded or unfolded relative to the legs 1; wherein the rotation axis of the armrests 4 and the legs 1 is horizontally parallel to the longitudinal direction.

[0074] In addition, the folding chair frame also includes a backrest frame mainly used for mounting the backrest 62 of the chair seat 6. The backrest frame can be flipped and folded or unfolded relative to the leg frame 1. For example, in this embodiment, the backrest frame includes two backrest rods 5, which are respectively hinged to the rear side of the two armrest frames 4. The hinge axis of the backrest rods 5 and the armrest frames 4 is parallel to the transverse direction. After the backrest rods 5 are flipped and unfolded, the hinged ends of the armrest rods will abut against the armrest frames 4 to limit the armrest rods from continuing to flip backward.

[0075] It is worth noting that the leg 1 is at least partially located inside the hinge point of the armrest frame 4, so that the armrest frame 4 is restricted from continuing to flip inward after being unfolded by the leg 1. That is, the armrest frame 4 has an inner limiting point, while the outer limiting point of the armrest frame 4 is specifically defined by the seat 6. Specifically, after the seat 6 is installed on the chair frame, when the chair frame is unfolded, the backrest 62 has a tendency to pull the two backrest rods 5 together in the lateral direction. In turn, the backrest rods 5 will cause the two armrest rods to have a tendency to flip inward. However, the armrest rods are restricted to the inner limiting point after being unfolded. Thus, the armrest rods are restricted to the unfolded state by the combined action of the backrest 62 and the leg 1.

[0076] like Figures 3-6 The images shown are of the different states of the folding chair frame during the folding process, in the order of folding. Figure 3 The diagram shows a schematic of the bipod 1 during the process of closing in the lateral direction; Figure 4 The diagram shows the tripod 1 fully extended and the backrest 5 folded onto the armrest. Figure 5 The images shown are of the armrests and backrests 5 folded down. Figure 6 This shows the chair frame in its final, fully folded state, that is, at... Figure 5 In this state, the tripod 1 is retracted, that is, the second tube section 112 is retracted into the first tube section 111, ultimately presenting... Figure 6 The state shown.

[0077] Example 2

[0078] The only difference between this embodiment and embodiment 1 is that in embodiment 1, the length of the column 11 is adjustable, while in this embodiment, as shown... Figure 10 As shown, column 11 is designed as a rod-shaped structure with a non-adjustable length.

[0079] Example 3

[0080] Combination Figures 1-10 As shown, this embodiment further provides a folding chair based on Embodiment 1 and Embodiment 2, including a folding chair frame and a flexible chair surface 6 installed on the folding chair frame, such as a chair surface 6 made of textile material, wherein the folding chair frame is the folding chair frame provided in Embodiment 1 or Embodiment 2.

[0081] During installation, part of the seat 6 is installed between the two seat rods 116 to form the seat 61 of the folding chair, and the other part is fixed between the two backrest rods 5 to form the backrest 62 of the folding chair.

[0082] in, Figure 8 and Figure 9 The diagrams shown are structural schematics of the folding chair in its unfolded state, using the chair frame provided in Embodiment 1. The difference is that... Figure 8In the middle, the tripod can be considered to be in a high position. Figure 9 The tripod can be considered to be in a low position.

[0083] Figure 10 The diagram shown is a structural schematic of the chair frame provided in Embodiment 2, where the height of the legs is not adjustable.

[0084] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this application can be achieved, and this is not limited herein.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0086] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A folding chair frame, comprising two legs arranged laterally opposite each other, a support frame hinged between the two legs and capable of lateral extension and retraction, and a locking mechanism for locking the chair frame when it is unfolded, characterized in that, The support frame includes two cross rods that are hinged together in a transverse direction. The two ends of the two cross rods that are close to each other are hinged together. Of the two ends of the two cross rods that are far apart from each other, the one on the upper side is hinged to the leg at a first hinge point, and the one on the lower side is hinged to the first end of a linkage rod. The second end of the linkage rod is hinged to the leg at a second hinge point, and the second hinge point is lower than the first hinge point.

2. The folding chair frame according to claim 1, characterized in that, The crossbar is X-shaped and includes a first rod and a second rod that are hinged together at the third hinge point in the middle. In the two crossbars, the first ends of the two first rods are hinged together, the second ends of the two first rods are respectively hinged to the two legs to form a second hinge point, the first ends of the two second rods are hinged together, and the second ends of the two linkage rods are respectively hinged to the two legs.

3. The folding chair frame according to claim 2, characterized in that, The locking mechanism includes two locking components, which are respectively hinged to two cross rods at a third hinge point. Each locking component includes a self-locking end, and the bottoms of the self-locking ends of the two locking components are hinged together so that when the folding chair frame is in the unfolded state, the self-locking ends of the two locking rods abut against each other to form a self-lock.

4. The folding chair frame according to claim 3, characterized in that, The support frame includes two sets, which are arranged opposite each other along the longitudinal direction. The locking member is located between the two support frames. The locking member includes two third rods and a fourth rod extending along the longitudinal direction. The two third rods are respectively fixed to both ends of the fourth rod to form a U-shaped rod structure. The third rod and the adjacent cross rod are hinged at the third hinge point. The end of the third rod away from the fourth rod forms the self-locking end.

5. The folding chair frame according to claim 1, characterized in that, The frame includes two longitudinally opposed columns, and the support frame is hinged to the columns; the two columns are fixed together by one or more crossbeams, wherein at least one crossbeam is located at the top of the columns and extends longitudinally to form a seat post for mounting the seat of the folding chair.

6. The folding chair frame according to claim 1, characterized in that, The vertical length of the tripod is adjustable.

7. The folding chair frame according to claim 6, characterized in that, The tripod includes two columns arranged opposite each other along the longitudinal direction; each column includes a first tube segment and a second tube segment that can extend and retract relative to each other along the length of the column; the column also includes a locking mechanism disposed between the first tube segment and the second tube segment for locking the relative position of the first tube segment and the second tube segment.

8. The folding chair frame according to claim 7, characterized in that, The first pipe segment and the second pipe segment are interlocked to allow the first pipe segment and the second pipe segment to move and expand relative to each other along the length of the column.

9. The folding chair frame according to claim 1, characterized in that, The folding chair frame also includes an armrest frame mounted on a leg frame, and the armrest frame is foldable or unfoldable relative to the leg frame; and / or the folding chair frame also includes a backrest frame, the backrest frame being foldable or unfoldable relative to the leg frame.

10. A folding chair, comprising a folding chair frame and a flexible chair surface mounted on the folding chair frame, characterized in that, The folding chair frame is the folding chair frame as described in any one of claims 1-9.

Images