Folding chair frame

Abstract

The utility model relates to the technical field of folding chair frames, in particular to a folding chair frame which comprises a telescopic component and at least three groups of connecting components, each connecting component comprises a first connecting piece and a second connecting piece, the side surface of at least one side of each first connecting piece and each second connecting piece is a plane, and the first connecting pieces and the second connecting pieces in the same group are arranged in a crossed manner. The plane of the first connecting piece can abut against the plane of the second connecting piece. The connecting assembly can be switched between an unfolded state and a folded state, under the condition that the connecting assembly is in the folded state, the plane of the first connecting piece abuts against the plane of the second connecting piece, the at least three telescopic pieces move along with rotation of the connecting assembly, and the distance between the at least three telescopic pieces is shortened to a second distance from a first distance; according to the folding chair frame, the contact area between the first connecting piece and the second connecting piece can be increased, the first connecting piece and the second connecting piece are prevented from twisting, the strength of the folding chair frame is improved, and the service life of the folding chair frame is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to folding chair frame technical field, especially a folding chair frame. BACKGROUND

[0002] Folding chair is used more and more in public place because of light, stackable and other functions, which is convenient to move and saves space. With the gradual improvement of people's living standards and the gradual enhancement of environmental protection consciousness, outdoor sports are more and more welcomed by people, and the demand for outdoor products is gradually increasing. This puts forward higher requirements for folding chair and other outdoor leisure furniture.

[0003] At present, the folding chair on the market is complex to install, and is prone to torsion, which affects the strength of the folding chair frame, shortens the service life of the folding chair frame and other problems.

[0004] Based on the shortcomings of the prior art, it is urgent to research a folding chair frame to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to solve the above technical problems, the utility model provides a folding chair frame, the position of the first connecting piece and the second connecting piece in the connecting assembly is plane, which increases the contact area between the first connecting piece and the second connecting piece, prevents the first connecting piece and the second connecting piece from torsion, and further increases the strength of the folding chair frame and improves the service life of the folding chair frame.

[0006] The utility model provides a folding chair frame, which comprises:

[0007] The telescopic assembly comprises at least three telescopic pieces and mounting pieces, the two ends of the telescopic piece are respectively provided with the mounting piece, and the telescopic piece is arranged along the height direction of the folding chair frame.

[0008] The connecting assembly comprises a first connecting piece and a second connecting piece, at least one side of the first connecting piece and the second connecting piece is plane, the first connecting piece and the second connecting piece in the same group are cross arranged, and the plane of the first connecting piece can abut with the plane of the second connecting piece.

[0009] The two telescopic pieces adjacent to each other are connected through a group of the connecting assembly, and the same mounting piece is rotatably connected with the first connecting piece and the second connecting piece in two groups of the connecting assembly.

[0010] The connecting assembly can be switched between an unfolded state and a folded state, in the case that the connecting assembly is in the unfolded state, the rotating connection positions of the first connecting piece and the second connecting piece abut, and the distance between the at least three telescopic pieces is a first distance; in the case that the connecting assembly is in the folded state, the plane of the first connecting piece and the plane of the second connecting piece abut, the at least three telescopic pieces move with the rotation of the connecting assembly, and the distance between the at least three telescopic pieces is reduced from the first distance to a second distance.

[0011] Further, the mounting piece has a first mounting position, a second mounting position and a telescopic piece mounting position;

[0012] The first mounting position is rotationally connected with a first connecting piece in a group of the connecting assemblies, and the second mounting position is rotationally connected with a second connecting piece in another group of the connecting assemblies.

[0013] The telescopic piece mounting position is connected with one end of the telescopic piece.

[0014] Further, the telescopic piece mounting position is a receiving cavity, and the end of the telescopic piece extends into the receiving cavity.

[0015] The end of the telescopic piece is clamped and fixed with the structure in the receiving cavity, and / or the end of the telescopic piece is slidingly connected with the receiving cavity.

[0016] Further, in the case that the mounting piece is fixed relative to the telescopic piece, a clamping protrusion is arranged in the receiving cavity, and a clamping groove adapted to the clamping protrusion is arranged on the end of the telescopic piece.

[0017] The end of the telescopic piece extends into the receiving cavity, and the clamping protrusion is clamped and matched with the clamping groove.

[0018] Further, the first mounting position and the second mounting position are both provided with mounting holes, and rotating shafts are arranged in the mounting holes.

[0019] The rotating shafts are fixedly connected with the corresponding connecting pieces, and under the action of an external force, the rotating shafts and the corresponding connecting pieces rotate relative to the mounting holes.

[0020] Further, the first mounting position, the telescopic piece mounting position and the second mounting position are sequentially arranged to form the L-shaped mounting piece.

[0021] Further, the telescopic assembly further comprises at least three extension pieces, and one end of each telescopic piece is provided with the extension piece.

[0022] The extension piece is integrally arranged with the telescopic piece or detachably connected with the telescopic piece through the mounting piece, or the extension piece is integrally arranged with one of the first connecting piece and the second connecting piece or detachably connected with one of the first connecting piece and the second connecting piece through the mounting piece.

[0023] Further, in the case that the extension piece is a backrest rod, the extension piece coincides with the axis of the corresponding telescopic piece, and the mounting piece is in sliding connection with the telescopic piece.

[0024] Further, at least two of the extension pieces are provided with a bending structure at the end away from the mounting piece.

[0025] In the case that the connecting assembly is in the folded state, the bending structures on the at least two extension pieces cooperate with each other to limit the movement of the connecting assembly.

[0026] Further, the first connecting piece and the second connecting piece in the connecting assembly are both D-shaped tubes, and the plane of the first connecting piece and the plane of the second connecting piece are oppositely arranged.

[0027] The embodiment of the present application has the following beneficial effects:

[0028] The present application can realize the folding chair frame formed by the telescopic pieces and the connecting assemblies in any shape to adapt to different needs of users, thereby improving the application range of the folding chair frame and the market competitiveness. Meanwhile, the positions abutted by the first connecting piece and the second connecting piece in each connecting assembly are both planes, thereby increasing the contact area between the first connecting piece and the second connecting piece, preventing the first connecting piece and the second connecting piece from being twisted, further increasing the strength of the folding chair frame and improving the service life of the folding chair frame. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0030] Figure 1 is a structure diagram of the folding chair frame in the unfolded state of the present embodiment;

[0031] Figure 2 is a structure diagram of the folding chair frame in the folded state of the present embodiment;

[0032] Figure 3Structure diagram of the first connecting piece, the second connecting piece, the telescopic piece and the mounting piece abutting against the ground after being connected in the embodiment;

[0033] Figure 4 Structure diagram of the first connecting piece, the second connecting piece, the telescopic piece and the mounting piece abutting against the ground after being connected in the embodiment;

[0034] Figure 5 Structure diagram of the first connecting piece, the second connecting piece, the telescopic piece and the mounting piece abutting against the ground after being connected in the embodiment;

[0035] Figure 6 Structure diagram of the first connecting piece and the second connecting piece after being connected in the embodiment in the unfolded state;

[0036] Figure 7 Structure diagram of the first connecting piece and the second connecting piece after being connected in the embodiment in the folded state;

[0037] Figure 8 Structure diagram of the mounting piece abutting against the ground in the first angle in the embodiment;

[0038] Figure 9 Structure diagram of the mounting piece abutting against the ground in the second angle in the embodiment.

[0039] In the drawings, the reference signs correspond to:

[0040] 1-telescopic assembly; 2-connecting assembly; 11-telescopic piece; 12-mounting piece; 13-extension piece; 21-first connecting piece; 22-second connecting piece; 121-first mounting position; 122-second mounting position; 123-telescopic piece mounting position; 131-bent structure; 1231-clamping protrusion. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0042] It should be noted that the terms "first", "second", and the like in the description and claims of the utility model and the above drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0043] In view of the defects of the prior art, the utility model discloses at least three telescopic parts, mounting parts and at least three groups of connecting assemblies, which can form a folding chair frame of any shape, to meet the different needs of users, improve the application range of the folding chair frame and market competitiveness. Meanwhile, the positions of the first connecting part and the second connecting part in each connecting assembly are flat, which increases the contact area between the first connecting part and the second connecting part, prevents the first connecting part and the second connecting part from being twisted, increases the strength of the folding chair frame and improves the service life of the folding chair frame.

[0044] Referring to the accompanying drawings Figures 1-9 The embodiment provides a folding chair frame, which comprises a telescopic assembly 1, at least three telescopic parts 11 and mounting parts 12, the two ends of the telescopic part 11 are respectively provided with the mounting part 12, and the telescopic part 11 is arranged along the height direction of the folding chair frame. At least three groups of connecting assemblies 2, the connecting assembly 2 comprises a first connecting part 21 and a second connecting part 22, at least one side of the first connecting part 21 and the second connecting part 22 is a plane, the first connecting part 21 and the second connecting part 22 in the same group are cross arranged, and the plane of the first connecting part 21 can abut against the plane of the second connecting part 22. Two adjacent telescopic parts 11 are connected through a group of connecting assemblies 2, and the same mounting part 12 is rotationally connected with the first connecting part 21 and the second connecting part 22 in two groups of connecting assemblies 2. The connecting assembly 2 can be switched between an unfolded state and a folded state. In the case that the connecting assembly 2 is in the unfolded state, the rotationally connected positions of the first connecting part 21 and the second connecting part 22 abut, and the distance between the at least three telescopic parts 11 is a first distance. In the case that the connecting assembly 2 is in the folded state, the plane of the first connecting part 21 and the plane of the second connecting part 22 abut, the at least three telescopic parts 11 move along with the rotation of the connecting assembly 2, and the distance between the at least three telescopic parts 11 is reduced from the first distance to a second distance.

[0045] It should be noted that: in the embodiment, by arranging the at least three telescopic members 11, the mounting members 12 and the at least three sets of connecting assemblies 2 which cooperate with each other, the telescopic members 11 and the connecting assemblies 2 can form a folding chair frame of any shape to adapt to different needs of users, thereby improving the application range of the folding chair frame and the market competitiveness; meanwhile, the positions abutted by the first connecting member 21 and the second connecting member 22 in each set of connecting assemblies 2 are planes, thereby increasing the contact area between the first connecting member 21 and the second connecting member 22, preventing the first connecting member 21 and the second connecting member 22 from being twisted, and further increasing the strength of the folding chair frame and the service life of the folding chair frame.

[0046] In the embodiment, the first distance is much larger than the second distance, the distance between the telescopic members 11 is the first distance when the folding chair frame is in the unfolded state, and the distance between the telescopic members 11 is the second distance when the folding chair frame is in the folded state.

[0047] In the embodiment, the number of sets of connecting assemblies 2 and the number of telescopic members 11 included in the folding chair frame are set according to actual conditions, which are not limited herein.

[0048] In the embodiment, the folding chair frame includes four sets of connecting assemblies 2, and the telescopic assembly 1 includes four telescopic members 11, both ends of each telescopic member 11 are provided with a mounting member 12, and the four sets of connecting assemblies 2 are used to connect the four telescopic members 11 to form a folding chair frame structure with a quadrilateral seat surface.

[0049] Specifically, two of the four telescopic members 11 are front end telescopic members 11, and the other two are rear end telescopic members 11.

[0050] In some possible embodiments, one end of the rear end telescopic member 11 is fixedly connected with the mounting member 12 abutting against the ground, and the other end of the rear end telescopic member 11 is fixedly connected or slidingly connected with the mounting member 12.

[0051] Specifically, in the case that the other end of the rear end telescopic member 11 is fixedly connected with the mounting member 12, the rear end telescopic member 11 is a telescopic rod assembly, the telescopic rod assembly includes a first telescopic rod and a second telescopic rod sleeved on the first telescopic rod, a limiting protrusion is arranged on the first telescopic rod, at least two limiting holes are arranged on the second telescopic rod in the axial direction of the second telescopic rod, the limiting protrusion extends out of the limiting hole to limit the movement of the first telescopic rod and the second telescopic rod; under the action of an external force, the limiting protrusion moves out of the limiting hole, and the first telescopic rod and the second telescopic rod can move relative to each other to ensure that the folding chair frame is smoothly unfolded or folded; by arranging the first telescopic rod and the second telescopic rod which cooperate with each other and are clamped by the limiting hole and the limiting protrusion, it can be avoided that the user mistakenly switches the folding chair frame from the unfolded state to the folded state, and thus the stability and safety of the folding chair frame can be ensured.

[0052] Specifically, the other end of the rear telescopic piece 11 is in sliding connection with the mounting piece 12, the rear telescopic piece 11 is a telescopic rod, one end of the telescopic rod is detachably connected with the mounting piece 12 abutting against the ground, and the other end of the telescopic rod is sleeved with a containing cavity, and the other end of the telescopic rod can extend out of the containing cavity to realize the sliding connection with the mounting piece 12.

[0053] In some possible embodiments, the folding chair frame includes three sets of connecting assemblies 2, the telescopic assembly 1 includes three telescopic pieces 11, each telescopic piece 11 is provided with mounting pieces 12 at two ends respectively, and the three sets of connecting assemblies 2 are used to connect the three telescopic pieces 11 to form a folding chair frame structure with a triangular chair surface.

[0054] In some possible embodiments, the folding chair frame includes three sets of connecting assemblies 2, the telescopic assembly 1 includes three telescopic pieces 11, each telescopic piece 11 is provided with mounting pieces 12 at two ends respectively, and the three sets of connecting assemblies 2 are used to connect the three telescopic pieces 11 to form a folding chair frame structure with a triangular chair surface.

[0055] In some possible embodiments, the mounting piece 12 has a first mounting position 121, a second mounting position 122 and a telescopic piece mounting position 123; the first mounting position 121 is in rotary connection with the first connecting piece 21 in one set of connecting assemblies 2, the second mounting position 122 is in rotary connection with the second connecting piece 22 in another set of connecting assemblies 2, and the telescopic piece mounting position 123 is connected with one end of the telescopic piece 11; by arranging the first mounting position 121, the second mounting position 122 and the telescopic piece mounting position 123, the first connecting piece 21, the second connecting piece 22 and the telescopic piece 11 can be connected respectively and isolated from each other, so that the first connecting piece 21, the second connecting piece 22 and the telescopic piece 11 do not affect each other during the folding or unfolding process of the folding chair frame, and the stability of the folding chair frame during the folding or unfolding process is ensured.

[0056] In the embodiment, a partition is arranged between the first mounting position 121, the second mounting position 122 and the telescopic piece mounting position 123, so as to isolate the first mounting position 121, the second mounting position 122 and the telescopic piece mounting position 123 from each other and avoid mutual interference during the movement.

[0057] In the embodiment, the size of the first mounting position 121, the size of the second mounting position 122 and the size of the telescopic mounting position 123 are not limited, as long as the connecting piece or the telescopic piece 11 arranged thereon does not interfere with the mounting position during the rotation.

[0058] In some possible embodiments, the telescopic member mounting position 123 is a receiving cavity, and the end of the telescopic member 11 extends into the receiving cavity; the end of the telescopic member 11 is fixedly connected to the structure in the receiving cavity, and / or the end of the telescopic member 11 is slidably connected to the receiving cavity. By setting the telescopic member mounting position 123 as a receiving cavity, the end of the telescopic member 11 can extend into the receiving cavity, which can improve the stability of the telescopic member 11 during installation to a certain extent.

[0059] In the embodiment, the telescopic member 11 can be a telescopic member 11 arranged at the front end of the folding chair frame, or a telescopic member 11 arranged at the rear end of the folding chair frame.

[0060] Specifically, in the case where the telescopic member 11 is a rear telescopic member 11, the rear telescopic member 11 and the extension member 13 connected thereto form a backrest structure of the folding chair frame, and the mounting members 12 arranged at both ends of the rear telescopic member 11 are slidably connected to the rear telescopic member 11.

[0061] Specifically, in the case where the telescopic member 11 is a front telescopic member 11, the mounting members 12 arranged at both ends of the front telescopic member 11 are fixedly connected to the front telescopic member 11.

[0062] In the embodiment, if the telescopic member 11 is slidably connected to the mounting member 12, the receiving cavity of the mounting member 12 is a cavity with openings at both ends, so that the telescopic member 11 can slide relative to the receiving cavity; if the telescopic member 11 is detachably connected to the mounting member 12, the receiving cavity of the mounting member 12 is a cavity with an opening at one end, and one end of the telescopic member 11 extends into the opening of the receiving cavity and is detachably connected to the receiving cavity.

[0063] In some possible embodiments, in the case where the mounting member 12 is fixedly connected to the telescopic member 11, a clamping protrusion 1231 is arranged in the receiving cavity, and a clamping groove matched with the clamping protrusion 1231 is arranged on the end of the telescopic member 11; the end of the telescopic member 11 extends into the receiving cavity, and the clamping protrusion 1231 is clamped and matched with the clamping groove. By arranging the clamping protrusion 1231 and the clamping groove matched with each other, the mounting member 12 and the telescopic member 11 can be stably connected, so as to ensure the stability of the folding chair frame; compared with the existing connection mode by screws or rivets, the connection mode of the embodiment is simple in structure, does not need to use additional connecting members, so as to simplify the installation steps and improve the installation efficiency.

[0064] In some possible embodiments, the first mounting position 121 and the second mounting position 122 are each provided with a mounting hole, and a rotating shaft is arranged in the mounting hole; the rotating shaft is fixedly connected with a corresponding connector, and under the action of an external force, the rotating shaft and the corresponding connector rotate relative to the mounting hole; by arranging the rotating shaft in the mounting hole, the rotating shaft and the corresponding connector can rotate relative to the mounting hole, so that the connecting assembly 2 can be folded or unfolded during folding of the folding chair frame, thereby ensuring the stability of the folding chair frame during folding or unfolding.

[0065] In some possible embodiments, the first mounting position 121, the telescopic piece mounting position 123, and the second mounting position 122 are sequentially arranged to form an L-shaped mounting piece 12; by being thus arranged, the positions of the first connector 21, the second connector 22, and the telescopic piece 11 connected with the mounting piece 12 can be reasonably arranged, and the overall size of the mounting piece 12 can be optimized, thereby reducing the manufacturing cost of the mounting piece 12 and avoiding mutual interference of the first connector 21, the second connector 22, and the telescopic piece 11 during folding or unfolding, and ensuring the stability of the folding chair frame during folding or unfolding.

[0066] In some possible embodiments, the telescopic assembly 1 further includes at least three extension pieces 13, and each telescopic piece 11 is provided with an extension piece 13 at one end; the extension piece 13 is integrally arranged with the telescopic piece 11 or detachably connected with the telescopic piece 11 through the mounting piece 12, or the extension piece 13 is integrally arranged with one of the first connector 21 and the second connector 22 or detachably connected with one of the first connector 21 and the second connector 22 through the mounting piece 12; by arranging the extension piece 13, a backrest support and / or an armrest support of the folding chair frame can be formed, so that a user can lean on the chair and / or place hands, thereby improving the user experience and market competitiveness.

[0067] In this embodiment, the extension piece 13 is an extension rod.

[0068] In this embodiment, the number of the extension pieces 13 corresponds to the number of the telescopic pieces 11.

[0069] In some possible embodiments, in the case where the extension piece 13 is a backrest rod, the extension piece 13 coincides with the axis of the corresponding telescopic piece 11, and the mounting piece 12 is slidingly connected with the telescopic piece 11; by being thus arranged, the backrest can be lengthened, and the comfort of a user when leaning can be improved, thereby improving the user experience.

[0070] In this embodiment, in the case where the extension piece 13 is a backrest rod, the extension piece 13 is integrally arranged; in the case where the extension piece 13 is an armrest rod, the extension piece 13 is detachably connected with the first connector 21 or the second connector 22 of the connecting assembly 2 through the mounting piece 12.

[0071] In the embodiment, the folding chair frame comprises four sets of connecting assemblies 2, the telescopic assembly 1 comprises four telescopic pieces 11 and four extension pieces 13, the four telescopic pieces 11 are connected through the four sets of connecting assemblies 2, and the four mounting pieces 12 arranged on one side of the telescopic piece 11 are connected with one extension piece 13 respectively; two of them are backrest rods, and the other two are armrest rods, and the armrest rods are provided with curved structures 131.

[0072] In some possible embodiments, at least two ends of the extension piece 13 away from the mounting piece 12 are provided with curved structures 131; in the case that the connecting assembly 2 is in the folded state, the curved structures 131 on the at least two extension pieces 13 cooperate with each other to limit the movement of the connecting assembly 2, and by arranging the curved structures 131, the stability of the folding chair frame in the folded state can be ensured by the cooperation of the curved structures 131 to fix the folding state of the folding chair frame, so that the folding chair frame is prevented from being unfolded when it is not needed to be unfolded.

[0073] In the embodiment, the specific structure of the curved structure 131 is not limited as long as the two adjacent curved structures 131 can cooperate with each other to limit the movement of the connecting assembly 2.

[0074] In the embodiment, the material of the curved structure 131 is not limited as long as the curved structure 131 can be deformed under external force and can ensure the current state without external force.

[0075] Preferably, the material of the curved structure 131 is an elastic material.

[0076] In some possible embodiments, the first connecting piece 21 and the second connecting piece 22 in the connecting assembly 2 are both D-shaped tubes, and the planes of the first connecting piece 21 and the second connecting piece 22 are arranged oppositely; by arranging the first connecting piece 21 and the second connecting piece 22 as D-shaped tubes, the abutting faces of the first connecting piece 21 and the second connecting piece 22 can be ensured as planes, so that the contact area between the first connecting piece 21 and the second connecting piece 22 is increased, the first connecting piece 21 and the second connecting piece 22 are prevented from being twisted, and thus the strength of the folding chair frame is ensured and the service life of the folding chair frame is improved.

[0077] In other possible embodiments, the first connecting piece 21 and the second connecting piece 22 in the connecting assembly 2 are both square tubes.

[0078] The unfolding process of the folding chair frame: in the case that the folding chair frame is in the folded state, the operator unlocks the curved structure 131 and drives the first connecting piece 21 and the second connecting piece 22 in the connecting assembly 2 to be able to rotate relatively, thereby driving the telescopic piece 11 to move, so that the distance between the telescopic pieces 11 is increased from the second distance to the first distance, and at this time, the folding chair frame is in the unfolded state.

[0079] Although the utility model has been described through preferred embodiments, the utility model is not limited to the embodiments described herein, and various changes and variations made without departing from the scope of the utility model.

[0080] In this article, the front, back, up, down and other orientation words are defined with the parts in the figure and the position of the parts relative to each other in the figure, just to express the technical scheme clearly and conveniently. It should be understood that the use of the orientation words should not limit the scope of the utility model claimed.

[0081] In the case of no conflict, the above-mentioned embodiments and the features in the embodiments can be combined with each other.

[0082] The above disclosure is only a preferred embodiment of the utility model, of course, cannot limit the scope of the utility model, therefore, the equivalent changes made according to the utility model claims still belong to the scope covered by the utility model.

Claims

1. A folding chair frame, characterized in that: include: A telescopic assembly (1) comprises at least three telescopic members (11) and mounting members (12), wherein the mounting members (12) are respectively provided at both ends of the telescopic members (11), and the telescopic members (11) are arranged along the height direction of the folding chair frame; At least three groups of connection components (2), the connection components (2) comprising a first connection member (21) and a second connection member (22), the side surfaces of at least one side of the first connection member (21) and the second connection member (22) being plane, the first connection member (21) and the second connection member (22) in the same group being arranged crosswise, and the plane of the first connection member (21) being capable of abutting against the plane of the second connection member (22); Two adjacent telescopic members (11) are connected via a set of connecting assemblies (2), and the same mounting member (12) is rotatably connected to the first connecting member (21) and the second connecting member (22) in the two sets of connecting assemblies (2). The connecting assembly (2) is capable of switching between an unfolded state and a folded state. When the connecting assembly (2) is in the unfolded state, the rotational connection positions of the first connecting member (21) and the second connecting member (22) abut against each other, and the distance between the at least three telescopic members (11) is a first distance. When the connecting assembly (2) is in the folded state, the plane of the first connecting member (21) and the plane of the second connecting member (22) abut against each other, and the at least three telescopic members (11) move as the connecting assembly (2) rotates, and the distance between the at least three telescopic members (11) is reduced from the first distance to the second distance.

2. The folding chair frame according to claim 1, characterized in that: The mounting member (12) has a first mounting position (121), a second mounting position (122), and a telescopic member mounting position (123); The first mounting position (121) is rotatably connected to a first connecting member (21) in one group of the connecting assemblies (2), and the second mounting position (122) is rotatably connected to a second connecting member (22) in another group of the connecting assemblies (2); The telescopic member installation position (123) is connected to one end of the telescopic member (11).

3. The folding chair frame according to claim 2, characterized in that: The telescopic member installation position (123) is a receiving cavity, and the end of the telescopic member (11) extends into the receiving cavity; The end of the telescopic member (11) is fixedly engaged with the structure inside the accommodating cavity, and / or the end of the telescopic member (11) is slidably connected relative to the accommodating cavity.

4. The folding chair frame according to claim 3, characterized in that: When the mounting member (12) and the telescopic member (11) are relatively fixed, a clamping protrusion (1231) is provided in the accommodating cavity, and a clamping groove adapted to the clamping protrusion (1231) is provided on the end of the telescopic member (11); The end of the telescopic member (11) extends into the accommodating cavity, and the snap-fitting protrusion (1231) is snap-fitted with the snap-fitting groove.

5. The folding chair frame according to claim 2, characterized in that: The first mounting position (121) and the second mounting position (122) are both provided with mounting holes, and a rotating shaft is provided in the mounting holes; The rotating shaft is fixedly connected to a corresponding connecting piece. Under the action of an external force, the rotating shaft and the corresponding connecting piece rotate relative to the mounting hole.

6. The folding chair frame according to claim 2, characterized in that: The first installation position (121), the telescopic member installation position (123), and the second installation position (122) are sequentially arranged to form the L-shaped installation member (12).

7. The folding chair frame according to any one of claims 1 to 6, characterized in that: The telescopic assembly (1) further comprises at least three extension pieces (13), and one end of each of the telescopic pieces (11) is provided with the extension piece (13); The extension piece (13) is integrally provided with the telescopic piece (11) or is detachably connected via the mounting piece (12), or the extension piece (13) is integrally provided with one of the first connecting piece (21) and the second connecting piece (22) or is detachably connected via the mounting piece (12).

8. The folding chair frame according to claim 7, characterized in that: In the case where the extension member (13) is a backrest rod, the axis of the extension member (13) and the corresponding telescopic member (11) coincide with each other, and the mounting member (12) is slidably connected to the telescopic member (11).

9. The folding chair frame according to claim 7, characterized in that: At least two ends of the extension members (13) away from the mounting member (12) are provided with a curved structure (131); When the connecting assembly (2) is in a folded state, the curved structures (131) on the at least two extension members (13) cooperate with each other to limit the movement of the connecting assembly (2).

10. The folding chair frame according to any one of claims 1 to 6, characterized in that: The first connecting member (21) and the second connecting member (22) in the connecting assembly (2) are both D-shaped tubes, and the plane of the first connecting member (21) and the plane of the second connecting member (22) are arranged opposite to each other.

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