Folding chair

Abstract

To provide a folding chair that reduces the volume after storage. [Solution] The chair frame body includes a backrest frame 1, a seat frame 2, and a pair of side frames 3 connecting the backrest frame and the seat frame, with the side frames and seat frame all having a scissor structure that can be folded inward. The backrest frame includes one main support rod 101, a pair of upper connecting rods 102, a pair of lower connecting rods 103, and a pair of stopper rods 104. A first connecting seat 4 and a second connecting seat 5 are fitted onto the main support rod from top to bottom, with one end of the upper connecting rod hinged to both sides of the first connecting seat and the other end hinged to the upper part of each side frame. One end of the lower connecting rod hinged to both sides of the second connecting seat and the other end hinged to the lower part of each side frame. One end of the stopper rod is hinged to the bottom of the main support rod, and the other end is hinged to the lower connecting rod.

Description

[Technical Field]

[0001] The present application relates to the field of chair technology, and in particular to folding chairs. [Background technology]

[0002] Folding chairs are easy to store and transport, and are widely used in homes, offices, outdoor leisure facilities, and various public facilities. Their core design goal is to ensure structural stability and comfortable seating, while minimizing storage volume after storage, making storage and transportation easier.

[0003] Existing folding chairs, such as the multi-functional folding chair disclosed in Chinese Patent Publication No. CN220734891U, utilize a locking mechanism to lock the folding chair into a fixed position when unfolded, and the first support rod, second support rod, and associated connecting rod can be unfolded or folded by pulling the reinforcing rod, making them convenient for transportation and carrying. However, since the folding chair primarily receives the tipping moment from the backrest through a single-point lock between the reinforcing rod and sleeve, the force is relatively concentrated, potentially resulting in significant wear on the locking mechanism and sleeve over time. Furthermore, the button is located low, making operation inconvenient. Furthermore, because the second support rod and the reinforcing rod on the backrest are relatively independent, the chair requires the reinforcing rod to be pushed downward while simultaneously moving the second support rod inward during storage, leaving room for further optimization of the operational flow and frame structure.

[0004] The above content is only used to assist in understanding the technical solution of the present application, and is not acknowledged as the closest prior art to the present application. Summary of the Invention [Problem to be solved by the invention]

[0005] Based on this, the present application provides a folding chair to solve one of the above technical problems. [Means for solving the problem]

[0006] The technical solution adopted by this application to solve the technical problem is a folding chair comprising a chair frame body, the chair frame body including a backrest frame, a seat frame, and a pair of side frames connecting the backrest frame and the seat frame, the side frames and the seat frame all having a scissor structure that can be folded inward. The backrest frame includes a main support rod, a pair of upper connecting rods, a pair of lower connecting rods, and a pair of stop rods, a first connecting seat and a second connecting seat fitted onto the main support rod in order from top to bottom, one end of the pair of upper connecting rods hinged to both sides of the first connecting seat and the other end hinged to the upper parts of the pair of side frames, one end of the pair of lower connecting rods hinged to both sides of the second connecting seat and the other end hinged to the lower parts of the pair of side frames. One end of the stopper rod is hinged to the bottom of the main support rod, and the other end is hinged to the lower connecting rod. A locking mechanism for locking the main support rod and the second connecting seat is provided inside the main support rod, and a stopper member is provided on the lower outer wall of the locking mechanism.

[0007] In some embodiments, the first connecting seat and the second connecting seat are both slidably mounted on the main support rod, and the stopper member is used to limit the lower limit of sliding of the second connecting seat.

[0008] In some embodiments, the first connecting seat is fixed to the main support rod, and the second connecting seat is slidable up and down on the main support rod, wherein the second connecting seat can only slide on the main support rod located above the stopper member.

[0009] In some embodiments, a first receiving groove is formed on each side of the first connecting seat, the pair of upper connecting rods are hingedly coupled to the first receiving grooves, and the upper connecting rods can only rotate upward relative to the first connecting seat.

[0010] In some embodiments, a second receiving groove is formed on each side of the bottom of the second connecting seat, and the pair of lower connecting rods are hingedly connected to the second receiving grooves, so that the lower connecting rods can rotate only downward relative to the second connecting seat.

[0011] In some embodiments, the locking mechanism includes an unlock button, a drive rod, a mounting sleeve, and a lock pin member, the lock pin member being slidably mounted on the mounting sleeve, one end of which can protrude laterally from the mounting sleeve, and the other end of which abuts against a laterally mounted spring, the other end of which is fixed inside the mounting sleeve.

[0012] In some embodiments, the drive rod is provided at the bottom of the unlock button, and a guide member that contacts the lock pin member is provided at the bottom of the drive rod, and the guide member and the lock pin member each have a guide slope that fits into each other. By pressing the unlock button downward, the lock pin member is completely inserted into the mounting sleeve, thereby completing the unlocking process.

[0013] In some embodiments, a positioning member is provided at the lower end of the driving rod to limit the position of the driving rod, a grip is provided at the top of the main support rod, and the unlock button is provided on the lower inner wall of the grip.

[0014] In some embodiments, a through hole is formed horizontally at the position where the lock pin member is positioned in the main support rod, and a lock hole whose diameter matches the through hole is formed in the second connecting seat, and the lock pin member is locked by inserting it into the through hole and the lock hole.

[0015] In some embodiments, the side frame includes a first side rod and a second side rod hinged to each other, wherein the length of the first side rod is greater than the length of the second side rod, a telescopic rod assembly is further provided between the first side rod and the second side rod, both ends of the telescopic rod assembly are hinged to the first side rod and the second side rod, respectively, a roller assembly is further provided at the bottom of the first side rod, the roller assembly is positioned on the side closer to the backrest, and the side frame and the seat frame are hinged to each other. [Effects of the Invention]

[0016] The present application has the following beneficial effects:

[0017] This application simplifies the structure of the backrest frame, and uses a locking mechanism inside the main support rod to control the locking and unlocking of the second connecting seat. After unlocking the second connecting seat, the main support rod is pushed downward (at which point the second connecting seat slides upward relative to the main support rod). This causes the upper connecting rod to bend upward and deflect, and the lower connecting rod to bend downward and deflect under the guide of the stopper rod, causing the backrest frame to retract inward. At the same time, the scissor-structured seat frame is also retracted inward. Finally, the backrest frame and seat frame are brought together, and the scissor-structured side frames are folded inward, completing the entire folding and storage process. This application has the advantages of simple operation, a compact structure, and smooth operation, and can effectively reduce the volume occupied by the chair during transportation and storage. Furthermore, since the locking mechanism and the stopper member jointly lock and support the second connecting seat, the force received by the locking mechanism is reduced, thereby extending the service life. [Brief explanation of the drawings]

[0018] In order to more clearly describe the technical solutions in the embodiments of the present application, the following briefly introduces the drawings necessary for describing the embodiments. 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 based on these drawings without any creative efforts.

[0019] [Figure 1] FIG. 2 is a schematic diagram of a chair frame body of the present application. [Figure 2] FIG. 2 is a schematic three-dimensional view of the back frame of the present application. [Figure 3] FIG. 2 is a schematic three-dimensional view of the back frame of the present application from another angle. [Figure 4] FIG. 2 is a schematic diagram of the main support rod of the present application. [Figure 5] FIG. 2 is a schematic diagram of the locking mechanism of the present application. [Figure 6] 10 is a schematic diagram of a connection relationship between a lock pin member and a guide member of the present application. FIG.

[0020] Explanation of symbols in the drawings: 1, backrest frame; 101, main support rod; 102, upper connecting rod; 103, lower connecting rod; 104, stopper rod; 2, seat frame; 3, side frame; 301, first side rod; 302, second side rod; 4, first connecting seat; 5, second connecting seat; 6, stopper member; 7, first accommodating groove; 8, second accommodating groove; 9, unlocking button; 10, driving rod; 11, mounting sleeve; 12, locking pin member; 13, spring; 14, guide member; 15, guide slope; 16, positioning member; 17, grip; 18, through hole; 19, locking hole; 20, telescopic rod assembly; 21, roller assembly. DETAILED DESCRIPTION OF THE INVENTION

[0021] The technical solutions in the embodiments of this application will be described below clearly and completely with reference to the drawings in the embodiments of this application. Obviously, the described embodiments are only some of the embodiments of this application, not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without any creative effort fall within the scope of protection of this application. Furthermore, the technical solutions in each embodiment may be combined with each other, provided that such combination is feasible by those skilled in the art. If a combination of technical solutions causes a contradiction or is impossible to realize, such combination of technical solutions shall be deemed non-existent and not included in the scope of protection of this application.

[0022] 1 to 6, the folding chair mainly comprises a chair frame body, which includes a backrest frame 1, a seat frame 2, and a pair of side frames 3 connecting the backrest frame 1 and the seat frame 2. The side frames 3 and the seat frame 2 are all inwardly foldable scissor structure (i.e., an X-shaped structure with two rods hinged to each other). The backrest frame 1 includes one main support rod 101, a pair of upper connecting rods 102, a pair of lower connecting rods 103, and a pair of stopper rods 104. A first connecting seat 4 and a second connecting seat 5 are fitted onto the main support rod 101 from top to bottom. One end of the pair of upper connecting rods 102 is hinged to both sides of the first connecting seat 4, and the other end is hinged to the upper part of the pair of side frames 3. One end of each of the pair of lower connecting rods 103 is hinged to either side of the second connecting seat 5, and the other end is hinged to the bottom of each of the pair of side frames 3. One end of the stopper rod 104 is hinged to the bottom of the main support rod 101, and the other end is hinged to the lower connecting rod 103. A locking mechanism for locking the main support rod 101 and the second connecting seat 5 is provided inside the main support rod 101, and a stopper member 6 is provided on the outer wall of the lower part of the main support rod 101. A chair cloth can be attached to the top of the chair frame body. When folding the chair frame body, first operate the locking mechanism to unlock the second connecting seat 5, and then press the main support rod 101 downward to rotate the upper connecting rod 102 and the lower connecting rod 103 upward and downward, respectively, to complete the storage of the backrest frame 1. At the same time that the backrest frame 1 is moved inward and stored, the seat frame 2 with a scissor structure is also moved inward and stored in sync, and finally, the seat frame 2 and the backrest frame 1 are brought together to complete the folding and storage of the entire chair frame body.

[0023] Some optimal or improved embodiments based on the above-mentioned embodiments will be described below. The following embodiments can be selected and used alone or in combination.

[0024] In one embodiment, the first connecting seat 4 and the second connecting seat 5 are both slidably mounted on the main support rod 101, and the stopper member 6 is used to limit the lower limit sliding position of the second connecting seat 5.

[0025] In another embodiment, the first connecting seat 4 is fixed to the main support rod 101, and the second connecting seat 5 is mounted on the main support rod 101 so as to be able to slide up and down, and the second connecting seat 5 can only slide on the part of the main support rod located above the stopper member 6. The stopper member 6 not only serves to position the second connecting seat 5, but also supports the second connecting seat 5 to distribute pressure, thereby extending the service life of the locking mechanism.

[0026] As shown in FIG. 2, a first receiving groove 7 is formed on each side of the first connecting seat 4, and the pair of upper connecting rods 102 are hingedly connected to the first receiving grooves 7, and the upper connecting rods 102 can only rotate upward relative to the first connecting seat 4.

[0027] 3, second receiving grooves 8 are formed on both sides of the bottom of the second connecting seat 5, and the pair of lower connecting rods 103 are hingedly connected to the second receiving grooves 8, so that the lower connecting rods 103 can only rotate downward relative to the second connecting seat 5. When the main support rod 101 is lifted, the lower connecting rod 103 can be deflected downward under the guidance of the stopper rod 104, and one end of the stopper rod 104 connected to the main support rod 101 is deflected upward as the main support rod 101 is lifted, finally realizing the entire backrest frame 1 to be gathered, folded and stored.

[0028] As shown in Figures 4 to 6, the locking mechanism includes an unlock button 9, a drive rod 10, a mounting sleeve 11, and a lock pin member 12. The lock pin member 12 is slidably mounted on the mounting sleeve 11, one end of which can protrude laterally from the mounting sleeve 11, and the other end of which abuts against a spring 13 mounted laterally, the other end of which is fixed inside the mounting sleeve 11.

[0029] Specifically, a positioning member 16 for restricting the position of the driving rod 10 is provided at the lower end of the driving rod 10, a grip 17 is provided at the top of the main support rod 101, and the unlock button 9 is provided on the inner wall at the bottom of the grip 17. By providing the unlock button 9 on the grip 17, unlocking and locking of the locking mechanism can be performed more conveniently, making it suitable for operation by elderly people and having a wide range of applications.

[0030] As shown in Figure 4, a through hole 18 is formed horizontally at the position where the lock pin member 12 is arranged in the main support rod 101, and a lock hole 19 whose diameter matches the diameter of the through hole 18 is formed in the second connecting seat 5. By inserting the lock pin member 12 into the through hole 18 and the lock hole 19, the second connecting seat 5 is locked.

[0031] 1, the side frame 3 includes a first side rod 301 and a second side rod 302 hinged to each other, wherein the length of the first side rod 301 is greater than the length of the second side rod 302, the top end of the first side rod 301 is disposed closer to the back frame 1, and the height of the top end of the first side rod 301 is higher than the height of the top end of the second side rod 302. A telescopic rod assembly 20 is further provided between the first side rod 301 and the second side rod 302, and both ends of the telescopic rod assembly 20 are hinged to the first side rod 301 and the second side rod 302, respectively. The telescopic rod assembly 20 is provided on the side frame 3 closest to the seat frame 2, and when the backrest frame 1 and the seat frame 2 are brought together by extension or retraction of the telescopic rod assembly 20, the ends of the first side rod 301 and the second side rod 302 approach each other and the length of the telescopic rod assembly 20 gradually increases, facilitating smooth storage and folding of the chair frame body. A roller assembly 21 is further provided on the bottom of the first side rod 301, and the roller assembly 21 is located on the side closest to the backrest, and the side frame 3 and the seat frame 2 are hinged to each other.

[0032] Up to now, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known to those skilled in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0033] Finally, it should be noted that the above content is merely a preferred embodiment of the present application, and the above embodiment is intended to illustrate the technical solutions of the present application, but is not intended to limit the same. Although the present application has been described in detail based on the above embodiment, those skilled in the art may modify the technical solutions described in each embodiment or replace some of the technical features with equivalents. Such modifications or replacements do not deviate from the essence of the corresponding technical solutions and the spirit and scope of the technical solutions of each embodiment of the present application.

Claims

1. This folding chair comprises a chair frame body, which includes a backrest frame, a seat frame, and a pair of side frames connecting the backrest frame and the seat frame, and the side frames and the seat frame have a scissor structure that allows them to be folded inward. The backrest frame includes one main support rod, a pair of upper connecting rods, a pair of lower connecting rods, and a pair of stopper rods, and a first connecting seat and a second connecting seat are fitted onto the main support rod in this order from top to bottom, and one end of each of the pair of upper connecting rods is hingedly connected to both sides of the first connecting seat, and the other end is hingedly connected to the top of each of the pair of side frames. One ends of the pair of lower connecting rods are hingedly connected to both sides of the second connecting seat, and the other ends are hingedly connected to the lower portions of the pair of side frames, respectively. One end of the stopper rod is hinged to the bottom of the main support rod, and the other end is hinged to the lower connecting rod. A locking mechanism for locking the main support rod and the second connecting seat is provided inside the main support rod, and a stopper member is provided on the lower outer wall of the locking mechanism. A folding chair characterized by:

2. The first connecting seat and the second connecting seat are both slidably mounted on the main support rod, and the stopper member is used to limit the lower limit of sliding of the second connecting seat.

2. The folding chair according to claim 1.

3. The first connecting seat is fixed to the main support rod, and the second connecting seat is provided on the main support rod so as to be vertically slidable, and among these, the second connecting seat can slide only on the main support rod portion located above the stopper member.

2. The folding chair according to claim 1.

4. A first receiving groove is formed on each side of the first connecting seat, and the pair of upper connecting rods are hingedly coupled to the first receiving grooves, and the upper connecting rods can rotate only upward relative to the first connecting seat.

4. A folding chair according to claim 2 or claim 3.

5. A second receiving groove is formed on each side of the bottom of the second connecting seat, and the pair of lower connecting rods are hingedly coupled to the inside of the second receiving groove, so that the lower connecting rods can rotate only downward relative to the second connecting seat.

4. A folding chair according to claim 2 or claim 3.

6. The locking mechanism includes an unlock button, a drive rod, a mounting sleeve, and a lock pin member. The lock pin member is slidably mounted on the mounting sleeve, one end of which can protrude laterally from the mounting sleeve, and the other end of which abuts against a laterally mounted spring, the other end of which is fixed inside the mounting sleeve.

2. The folding chair according to claim 1.

7. The drive rod is provided at the bottom of the unlock button, and a guide member that comes into contact with the lock pin member is provided at the bottom of the drive rod. The guide member and the lock pin member each have guide slopes that fit together, and by pressing the unlock button downward, the lock pin member is completely housed inside the mounting sleeve, completing the unlocking process.

7. The folding chair according to claim 6.

8. A positioning member for restricting the position of the driving rod is provided at the lower end of the driving rod, a grip is provided at the top of the main support rod, and the unlock button is provided on the lower inner wall of the grip.

8. The folding chair according to claim 7.

9. A through hole is formed laterally at the position where the lock pin member is disposed in the main support rod, and a lock hole having a diameter that matches the diameter of the through hole is formed in the second connecting seat, and the second connecting seat is locked by inserting the lock pin member into the through hole and the lock hole.

8. The folding chair according to claim 7.

10. The side frame includes a first side rod and a second side rod hinged to each other, the length of the first side rod being greater than the length of the second side rod, a telescopic rod assembly is further provided between the first side rod and the second side rod, both ends of the telescopic rod assembly are hinged to the first side rod and the second side rod, respectively, a roller assembly is further provided at the bottom of the first side rod, the roller assembly is disposed on a side closer to the backrest, and the side frame and the seat frame are hinged to each other.

2. The folding chair according to claim 1.

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