WO2024065967A1

WO2024065967A1 - Easy-to-store folding chair structure

Info

Publication number: WO2024065967A1
Application number: PCT/CN2022/130990
Authority: WO
Inventors: 陈校波; 高海宏; 潘鹏; 于德举
Original assignee: 浙江嘉立德运动科技有限公司
Priority date: 2022-09-26
Filing date: 2022-11-10
Publication date: 2024-04-04
Also published as: CN218791353U

Abstract

An easy-to-store folding chair structure, comprising a connecting plate (1), a plurality of support tubes (2), and a plurality of leg tubes (3). The support tubes (2) are detachably connected to the connecting plate (1) and extend upwards; the leg tubes (3) are detachably connected to the connecting plate (1) and extend downwards; and the connecting plate (1) is provided with first storage grooves (4) for storing the support tubes (2) and second storage grooves (5) for storing the leg tubes (3). After the folding chair is folded, the tubes are stored neatly, so that the size is small, and packaging, carrying and transportation are convenient.

Description

A folding chair structure that is easy to store

Technical Field

The invention relates to a leisure product, and more particularly to a folding chair structure which is convenient for storage.

Background technique

At present, when carrying out outdoor leisure activities, people often carry folding chairs, which are foldable and small in size and easy to carry. After folding, many folding chairs on the market have messy tubes and need to be sorted before being put into bags, which brings inconvenience to packaging and transportation.

Summary of the invention

In order to overcome the above-mentioned shortcomings, the present invention provides a folding chair structure which is easy to store. After folding, the pipes can be neatly stored, the volume is small, and the packaging, carrying and transportation are convenient.

In order to solve the above technical problems, the present invention adopts the following technical solutions: a folding chair structure that is easy to store, including a connecting plate, a plurality of supporting tubes, and a plurality of leg tubes, the supporting tubes being detachably connected to the connecting plate and extending upward, the leg tubes being detachably connected to the connecting plate and extending downward, and the connecting plate being provided with a first storage groove for storing the supporting tubes and a second storage groove for storing the leg tubes.

When the folding chair is in use, the support tube and the leg tube are inserted into the connecting plate, the support tube extends upward, and the leg tube extends downward, the leg tube supports the entire folding chair, and the cloth cover is put on the support tube for people to sit on. When folding and storing, the cloth cover is removed, the support tube is removed and installed in the first storage slot on the connecting plate, and the leg tube is removed and installed in the second storage slot on the connecting plate. The pipe fittings are stored neatly to avoid messy placement of the pipe fittings. After storage, the volume is small, and it is convenient to pack, carry and transport.

Preferably, a clamping block for limiting the position of the support tube is provided on the edge of the first receiving groove; and a positioning block for limiting the position of the leg tube is provided on the edge of the second receiving groove.

After the support tube is received in the first receiving groove, the clamping block limits the support tube to prevent the support tube from leaving the first receiving groove. After the leg tube is received in the second receiving groove, the positioning block limits the leg tube to prevent the leg tube from leaving the second receiving groove.

Preferably, the cross-section of the connecting plate is wavy, so that a plurality of first receiving grooves are formed on a surface of one side of the connecting plate, and a plurality of second receiving grooves are formed on a surface of the other side of the connecting plate.

The wavy connecting plate facilitates the layout of the first receiving groove and the second receiving groove.

Preferably, a handle is provided on one side edge of the connecting plate, which facilitates the lifting of the connecting plate and the carrying of the folding chair.

Preferably, upper sockets are provided on the connecting plate and the supporting tube correspondingly, lower sockets are provided on the connecting plate and the leg tube correspondingly, the supporting tube is adapted to be inserted into the upper sockets, and the leg tube is adapted to be inserted into the lower sockets.

The upper socket facilitates the connection and disassembly of the support tube and the connecting plate. The lower socket facilitates the connection and disassembly of the leg tube and the connecting plate.

Preferably, an elastic cord is connected between the support tube and the upper socket. After the support tube is pulled out of the upper socket, the elastic cord is always connected between the support tube and the upper socket, which facilitates the one-to-one positioning of the support tube and the upper socket during the connection process and prevents the support tube from being inserted into the wrong position.

Preferably, a strap is connected to the connecting plate, and the strap passes around the first receiving slot and the second receiving slot, so as to protect the support tube in the first receiving slot and the leg tube in the second receiving slot, thereby preventing the support tube from being separated from the first receiving slot and the leg tube from being separated from the second receiving slot.

Preferably, the leg tube comprises an upper tube and a lower tube, the lower portion of the upper tube is inserted into the lower tube, the lower tube is provided with a plurality of positioning holes spaced apart from each other, the upper tube is connected with a spring pin, and the spring pin is inserted into the positioning hole.

The upper tube and the lower tube are inserted together to form a leg tube, which is convenient for adjusting the length of the leg tube. After the length is adjusted to the right position, the elastic pin is inserted into the positioning hole to realize the locking and positioning of the upper tube and the lower tube.

Preferably, the lower end of the lower tube section is connected to an anti-slip sleeve, the upper end of the lower tube section is connected to a connecting sleeve, and the connecting sleeve is sealingly sleeved with the upper tube section.

The anti-slip cover plays a good anti-slip role, and the connecting cover plays a sealing and waterproof role.

Preferably, the support tube includes a front support tube and a rear support tube, the upper end of the rear support tube is higher than the upper end of the front support tube; the rear support tube includes an inner tube and an outer tube, the lower part of the inner tube is inserted into the outer tube, the inner tube is connected to an elastic positioning pin, the outer tube is provided with a pin hole, and the elastic positioning pin is connected to the pin hole by insertion.

The rear support tube is high and serves as a backrest support rod of the folding chair. The inner tube and the outer tube are connected in a sleeve to form the rear support tube, which is convenient for contraction during storage, reduces the length and can be stored in the first storage slot.

Preferably, two hinged ears are provided at the upper end of the outer tube, and hinged holes are provided on the hinged ears. The lower end of the inner tube is connected to the end column, and two connecting pins that can be axially moved are installed on the end column, and a preload spring is installed between the connecting pin and the end column. An inflation chamber is provided on the end column, and a piston is installed in the inflation chamber; a one-way air inlet hole and a one-way air outlet hole connected to the inflation chamber are provided on the end column; an airbag sleeve is mounted on the outer wall of the inner tube, and an inflation tube is connected between the one-way air outlet hole and the airbag sleeve; a locking groove is provided on the upper end of the inner tube, and a locking pin is connected to the upper end of the front support tube; the inner tube is pulled upward to insert the connecting pin into the hinge hole, and then the inner tube is flipped forward, and the inner tube is pushed and pulled back and forth to make the connecting pin move axially relative to the end column, and the piston moves in the inflation chamber to inflate the airbag sleeve, so that the airbag sleeve bulges outward, and finally the inner tube is connected to the locking pin on the front support tube through the locking groove.

The inner tube is flipped forward and the upper end of the inner tube is connected to the front support tube. At this time, the inner tube forms an armrest for placing hands, which improves comfort. Moreover, by pushing and pulling the inner tube forward and backward, the piston moves in the inflation chamber, thereby inflating the airbag sleeve, and the airbag sleeve bulges outward. It is more comfortable to put the arm on the bulging airbag sleeve.

Preferably, a sliding seat is installed on the end column and corresponding to the connecting pin, a mounting groove is provided on the sliding seat, a preload spring is installed in the mounting groove, one end of the connecting pin is movably installed in the mounting groove, and the preload spring abuts against the connecting pin; a sliding groove is provided on the end column and corresponding to the sliding seat, the sliding seat is installed in the sliding groove and can move axially, and a push-pull rod is connected between the sliding seat and the piston.

Before the connecting pin is inserted into the hinge hole, one end of the connecting pin abuts against the inner wall of the outer tube, and the other end of the connecting pin abuts against the buffer spring. After the connecting pin slides to the hinge hole position, the connecting pin is pushed outward by the buffer spring, so that the connecting pin is inserted into the hinge hole. Then the inner tube is pushed and pulled, at this time the connecting pin does not move, the slide seat moves axially in the slide groove, and the piston is driven to move in the inflation chamber through the push-pull rod, thereby inflating the airbag sleeve.

Preferably, a return spring is installed in the inflation chamber, and the return spring abuts against the piston. The installation of the return spring facilitates the return of the piston, the sliding seat, and the connecting pin.

Preferably, an air release valve connected to the airbag sleeve is installed on the inner tube, a valve seat is provided in the air release valve, a valve hole is provided on the valve seat, a valve plate is installed in the air release valve, a plurality of ventilation grooves are provided on the edge of the valve plate, a sealing spring is installed between the valve plate and the air release valve, and the valve plate seals and covers the valve hole.

The valve plate is pressed to separate the valve plate from the valve seat, the valve hole is opened, and the air bag sleeve is deflated.

Preferably, the locking pin has a T-shaped structure, the locking groove has a long strip structure, and the upper end of the locking groove is provided with a through hole that matches the end of the locking pin; the inner tube is pushed backward to align the through hole with the end of the locking pin. After the end of the locking pin is inserted into the through hole, the inner tube moves forward to allow the locking pin to slide through the locking groove, and the end of the locking pin is stuck in the inner tube.

When the locking pin and the locking groove are connected, first push the inner tube backward to align the through hole and the locking pin. After the large end of the locking pin is inserted into the through hole, push the inner tube forward to make the locking pin slide through the locking groove, and then make the end of the locking pin stuck in the inner tube, so as to achieve a reliable connection between the inner tube and the front support tube.

The connecting pin realizes the hinge connection between the inner tube and the hinge ear, and the connecting pin can be axially moved on the end column to realize the inflation of the airbag cover. The airbag cover bulges outward to increase the comfort of using the inner tube as an armrest. The connecting pin can be axially moved so that the locking pin can be reliably locked after being connected with the locking groove to prevent the inner tube from detaching from the front support tube.

Preferably, an axially arranged positioning groove is provided on the inner wall of the hinge ear, the positioning groove extends toward the inner wall of the outer tube, the hinge hole is arranged in the positioning groove, and the end of the connecting pin abuts against the positioning groove.

The positioning groove is provided to position the connecting pin circumferentially, ensuring that the connecting pin can be moved and inserted into the hinge hole.

Compared with the prior art, the present invention has the following beneficial effects: (1) after the folding chair is folded, the tubes are neatly stored, the volume is small, and the packaging, carrying and transportation are convenient; (2) the inner tube of the rear support tube can not only be used to connect the cloth cover and be used as a support tube, but also can be flipped forward and used as an armrest. At this time, the upper end of the outer tube serves as the connection support point of the cloth cover, and the airbag cover is installed outside the inner tube. Pushing and pulling the inner tube can inflate the airbag cover so that the airbag cover bulges outward, thereby increasing the comfort of the inner tube when used as an armrest.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of the present invention;

FIG2 is a schematic diagram of the front structure of the present invention;

FIG3 is a schematic diagram of the back structure of the present invention;

FIG4 is a cross-sectional view of a connecting plate of the present invention;

FIG5 is a side view of Embodiment 2 of the present invention;

FIG6 is a schematic diagram of an inner tube after being flipped forward in Embodiment 2 of the present invention;

7 is a partial cross-sectional view of the connection between the inner tube and the end post in Example 2 of the present invention;

FIG8 is a partial enlarged schematic diagram of the position of the air release valve in Example 2 of the present invention;

In the figure: 1, connecting plate, 2, supporting tube, 3, leg tube, 4, first storage slot, 5, second storage slot, 6, handle, 7, gripper slot, 8, front supporting tube, 9, rear supporting tube, 10, inner tube, 11, outer tube, 12, upper tube, 13, lower tube, 14, anti-slip sleeve, 15, connecting sleeve, 16, clamping block, 17, positioning block, 18, baffle, 19, upper socket, 20, lower socket, 21, connecting block, 22, elastic rope, 23, pulling head, 24, plug , 25, strap, 26, through groove, 27, mother-and-child buckle, 28, Japanese buckle, 29, hinged ear, 30, hinged hole, 31, end column, 32, through hole, 33, connecting pin, 34, preload spring, 35, inflation chamber, 36, piston, 37, one-way air inlet, 38, one-way air outlet, 39, airbag cover, 40, inflation tube, 41, locking groove, 42, locking pin, 43, slide seat, 44, mounting groove, 45, slide groove, 46, push-pull rod, 47, return spring, 48, deflation valve, 49, valve seat, 50, valve hole, 51, valve plate, 52, ventilation groove, 53, sealing spring, 54, operating handle, 55, perforation, 56, positioning groove.

Detailed ways

The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

Embodiment 1: A folding chair structure that is easy to store (see Figures 1 to 4), comprising a connecting plate 1, a plurality of support tubes 2, and a plurality of leg tubes 3. In this embodiment, four support tubes and four leg tubes are provided, and a support tube and a leg tube are connected at each of the four corners of the connecting plate. The support tube is detachably connected to the connecting plate and extends upward, and the leg tube is detachably connected to the connecting plate and extends downward. The connecting plate is provided with a first storage groove 4 for storing the support tube and a second storage groove 5 for storing the leg tube. A handle 6 is provided on one side edge of the connecting plate, and a grip groove 7 is formed between the handle and the edge of the connecting plate to facilitate gripping the handle.

The support tube includes a front support tube 8 and a rear support tube 9, and the upper end of the rear support tube is higher than the upper end of the front support tube; the rear support tube includes an inner tube 10 and an outer tube 11, the lower part of the inner tube is sleeved in the outer tube, the inner tube is connected with an elastic positioning pin, and the outer tube is provided with a pin hole, and the elastic positioning pin is plugged and connected with the pin hole. The leg tube includes an upper tube 12 and a lower tube 13, the lower part of the upper tube is inserted in the lower tube, and the lower tube is provided with a plurality of positioning holes arranged at intervals up and down, and the upper tube is connected with an elastic pin, and the elastic pin is inserted in the positioning hole. The lower end of the lower tube is connected with an anti-slip sleeve 14, and the upper end of the lower tube is connected with a connecting sleeve 15, and the connecting sleeve is sealed and sleeved with the upper tube.

The cross section of the connecting plate is wavy, so that a plurality of first receiving grooves are formed on the surface of one side of the connecting plate, and a plurality of second receiving grooves are formed on the surface of the other side of the connecting plate. A clamping block 16 for limiting the position of the support tube is provided at the edge of the first receiving groove; a positioning block 17 for limiting the position of the leg tube is provided at the edge of the second receiving groove. There are two pairs of clamping blocks, and the two pairs of clamping blocks are respectively arranged near the two ends of the first receiving groove, and the spacing between the two opposite clamping blocks is smaller than the width of the first receiving groove, so that the support tube is limited after being clamped into the first receiving groove from the two opposite clamping blocks. There are two pairs of positioning blocks, and the two pairs of positioning blocks are respectively arranged near the two ends of the second receiving groove, and the spacing between the two opposite positioning blocks is smaller than the width of the second receiving groove, so that the leg tube is limited after being clamped into the second receiving groove from the two opposite positioning blocks.

Baffles 18 are provided at both ends of the first receiving groove and the second receiving groove on the edge of the connecting plate. The baffles can block the support tube in the first receiving groove and the leg tube in the second receiving groove to prevent the support tube from sliding away from both ends of the first receiving groove and the leg tube from sliding away from both ends of the second receiving groove.

The upper plug hole 19 is provided on the connection plate and the support tube, and the lower plug hole 20 is provided on the connection plate and the leg tube. The support tube is adapted to be inserted into the upper plug hole, and the leg tube is adapted to be inserted into the lower plug hole. The upper plug hole and the support tube are arranged to be tilted outward from bottom to top, and the lower plug hole and the leg tube are arranged to be tilted outward from top to bottom. The four corners of the connection plate are provided with connection blocks 21, and each connection block is provided with an upper plug hole and a lower plug hole. The handle is connected between the two opposite connection blocks at the front and rear.

An elastic rope 22 is connected between the support tube and the upper socket, a pulling head 23 is installed at the bottom of the upper socket, a plug 24 is connected to the upper end of the support tube, one end of the elastic rope is connected to the pulling head, and the other end is connected to the plug. A strap 25 is connected to the connecting plate, and the strap passes through the first storage slot and the second storage slot. The two ends of the strap are connected by a parent-child buckle 27, and a Japanese buckle 28 is connected to the strap to facilitate length adjustment. Two through slots 26 are provided on the connecting plate and corresponding to the strap, and the strap passes through the two through slots.

Embodiment 2: A folding chair structure that is easy to store (see Figures 5 to 8), which has a structure similar to that of Embodiment 1, with the main difference being that in this embodiment, two hinge ears 29 are provided at the upper end of the outer tube, and hinge holes 30 are provided on the hinge ears. Sufficient distance is left from the hinge holes to the upper ends of the hinge ears to ensure that the cloth cover can be put on the upper ends of the hinge ears to achieve reliable connection. The lower end of the inner tube is connected to the end column 31, and a through hole 32 is arranged in the middle of the end portion. Two connecting pins 33 which can be axially moved are installed on the end column, and a preload spring 34 is installed between the connecting pin and the end column. An inflation chamber 35 is arranged on the end column, and a piston 36 is installed in the inflation chamber; a one-way air inlet hole 37 and a one-way air outlet hole 38 which are connected to the inflation chamber are arranged on the end column; an airbag sleeve 39 is sleeved on the outer wall of the inner tube, and an inflation tube 40 is connected between the one-way air outlet hole and the airbag sleeve; a locking groove 41 is arranged on the upper end of the inner tube, and a locking pin 42 is connected to the upper end of the front support tube; the inner tube is pulled upward to make the connecting pin inserted into the hinge hole, and then the inner tube is turned forward, and the inner tube is pushed and pulled back and forth to make the connecting pin move axially relative to the end column, and the piston moves in the inflation chamber to inflate the airbag sleeve, so that the airbag sleeve bulges outward, and finally the inner tube is connected to the locking pin on the front support tube through the locking groove.

A slide 43 is installed on the end column and the connecting pin in correspondence, and a mounting groove 44 is provided on the slide. A preload spring is installed in the mounting groove. One end of the connecting pin can be movably installed in the mounting groove, and the preload spring abuts on the connecting pin; a slide groove 45 is provided on the end column and the slide, and the slide is installed in the slide groove and can be axially moved. A push-pull rod 46 is connected between the slide and the piston. A return spring 47 is installed in the inflation chamber, and the return spring abuts on the piston. An air release valve 48 connected to the airbag sleeve is installed on the inner tube, and a valve seat 49 is provided in the air release valve, and a valve hole 50 is provided on the valve seat. A valve plate 51 is installed in the air release valve, and a plurality of ventilation grooves 52 are provided on the edge of the valve plate. A sealing spring 53 is installed between the valve plate and the air release valve, and the valve plate seals and covers the valve hole. An operating handle 54 is provided on the valve plate, and the operating handle passes through the valve hole, and a gap is provided between the outer wall of the operating handle and the inner wall of the valve hole. The locking pin is in a T-shaped structure, and the locking groove is in a long strip structure. The upper end of the locking groove is provided with a through hole 55 adapted to the end of the locking pin; the inner tube is pushed backward to align the through hole with the end of the locking pin. After the end of the locking pin is inserted into the through hole, the inner tube moves forward to make the locking pin slide through the locking groove, and the end of the locking pin is stuck in the inner tube. An axially arranged positioning groove 56 is provided on the inner wall of the hinge ear, and the positioning groove extends to the inner wall of the outer tube. The hinge hole is set in the positioning groove, and the end of the connecting pin abuts against the positioning groove. The other structures are the same as those in Example 1.

The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

A folding chair structure that is easy to store is characterized in that it includes a connecting plate, a plurality of supporting tubes, and a plurality of leg tubes. The supporting tubes are detachably connected to the connecting plate and extend upward, and the leg tubes are detachably connected to the connecting plate and extend downward. The connecting plate is provided with a first storage groove for storing the supporting tubes and a second storage groove for storing the leg tubes.
According to the folding chair structure that is easy to store as described in claim 1, it is characterized in that a clamping block for limiting the support tube is provided at the edge of the first storage groove; and a positioning block for limiting the leg tube is provided at the edge of the second storage groove.
According to the folding chair structure that is easy to store as described in claim 1, it is characterized in that the cross-section of the connecting plate is wavy, so that a plurality of first storage grooves are formed on the surface of one side of the connecting plate, and a plurality of second storage grooves are formed on the surface of the other side of the connecting plate.
The folding chair structure that is easy to store according to claim 1 is characterized in that a handle is provided on one edge of the connecting plate.
According to the folding chair structure that is easy to store as described in claim 1, it is characterized in that upper sockets are correspondingly provided on the connecting plate and the supporting tube, lower sockets are correspondingly provided on the connecting plate and the leg tube, the supporting tube is adapted to be inserted into the upper socket, and the leg tube is adapted to be inserted into the lower socket.
According to the folding chair structure that is easy to store as described in claim 5, it is characterized in that an elastic rope is connected between the support tube and the upper plug hole.
According to the folding chair structure that is easy to store as described in claim 1, it is characterized in that a strap is connected to the connecting plate, and the strap passes around the first storage groove and the second storage groove.
A folding chair structure that is easy to store according to any one of claims 1 to 7, characterized in that the leg tube includes an upper tube and a lower tube, the lower portion of the upper tube is inserted into the lower tube, the lower tube is provided with a plurality of positioning holes spaced apart from each other, the upper tube is connected to a spring pin, and the spring pin is inserted into the positioning hole.
According to the folding chair structure that is easy to store as described in claim 8, it is characterized in that the lower end of the lower tube is connected to the anti-slip sleeve, the upper end of the lower tube is connected to the connecting sleeve, and the connecting sleeve is sealingly sleeved with the upper tube.
According to a folding chair structure that is easy to store, as described in any one of claims 1 to 7, it is characterized in that the support tube includes a front support tube and a rear support tube, the upper end of the rear support tube is higher than the upper end of the front support tube; the rear support tube includes an inner tube and an outer tube, the lower part of the inner tube is sleeved in the outer tube, an elastic positioning pin is connected to the inner tube, and a pin hole is provided on the outer tube, and the elastic positioning pin is plug-connected with the pin hole.
The foldable chair structure according to claim 10 is characterized in that the upper end of the outer tube is provided with two hinge ears, the hinge ears are provided with hinge holes, the lower end of the inner tube is connected to the end column, two connecting pins which can be axially moved are installed on the end column, a preload spring is installed between the connecting pin and the end column, an inflation chamber is provided on the end column, and a piston is installed in the inflation chamber; a one-way air inlet hole and a one-way air outlet hole which are connected to the inflation chamber are provided on the end column; an air bag sleeve is sleeved on the outer wall of the inner tube, and an inflation tube is connected between the one-way air outlet hole and the air bag sleeve; a locking groove is provided on the upper end of the inner tube, and a locking pin is connected to the upper end of the front support tube; the inner tube is pulled upward to make the connecting pin inserted into the hinge hole, and then the inner tube is turned forward, and the inner tube is pushed and pulled back and forth to make the connecting pin move axially relative to the end column, the piston moves in the inflation chamber to inflate the air bag sleeve, so that the air bag sleeve bulges outward, and finally the inner tube is connected to the locking pin on the front support tube through the locking groove.
According to a folding chair structure that is easy to store as described in claim 11, it is characterized in that a slide seat is installed on the end column corresponding to the connecting pin, a mounting groove is provided on the slide seat, a preload spring is installed in the mounting groove, one end of the connecting pin is movably installed in the mounting groove, and the preload spring abuts against the connecting pin; a slide groove is provided on the end column corresponding to the slide seat, the slide seat is installed in the slide groove and can move axially, and a push-pull rod is connected between the slide seat and the piston.
According to the folding chair structure that is easy to store as described in claim 11, it is characterized in that a return spring is installed in the inflation chamber, and the return spring abuts against the piston.
According to the folding chair structure that is easy to store as described in claim 11, it is characterized in that an air release valve connected to the airbag sleeve is installed on the inner tube, a valve seat is provided in the air release valve, a valve hole is provided on the valve seat, a valve plate is installed in the air release valve, a plurality of ventilation grooves are provided on the edge of the valve plate, a sealing spring is installed between the valve plate and the air release valve, and the valve plate seal covers the valve hole.
According to the folding chair structure that is easy to store as described in claim 11, it is characterized in that the locking pin is in a T-shaped structure, the locking groove is in a long strip structure, and the upper end of the locking groove is provided with a through hole that matches the end of the locking pin; the inner tube is pushed backward to align the through hole with the end of the locking pin, and after the end of the locking pin is inserted into the through hole, the inner tube moves forward to make the locking pin slide through the locking groove, and the end of the locking pin is stuck in the inner tube.
According to the folding chair structure that is easy to store as described in claim 11, it is characterized in that an axially arranged positioning groove is provided on the inner wall of the hinge ear, the positioning groove extends toward the inner wall of the outer tube, the hinge hole is arranged in the positioning groove, and the end of the connecting pin abuts against the positioning groove.