A folding chair

Abstract

The application discloses a folding chair, which comprises a chair frame body, the chair frame body comprises a back support, a seat support and a pair of side supports for connecting the back support and the seat support, the side supports and the seat support are both scissor structures capable of being folded inward; the back support comprises a main support rod, a pair of upper connecting rods, a pair of lower connecting rods and a pair of limiting rods, the main support rod is provided with a first connecting seat and a second connecting seat from top to bottom, one end of each of the upper connecting rods is hingedly connected to the two sides of the first connecting seat, and the other end of each of the upper connecting rods is hingedly connected to the upper part of each of the side supports; one end of each of the lower connecting rods is hingedly connected to the two sides of the second connecting seat, and the other end of each of the lower connecting rods is hingedly connected to the lower part of each of the side supports; one end of the limiting rod is hingedly connected to the bottom of the main support rod, and the other end of the limiting rod is hingedly connected to the lower connecting rod.

Description

Technical Field

[0001] This application relates to the field of chair technology, and in particular to a folding chair. Background Technology

[0002] Folding chairs, as a type of seating that is easy to store and carry, are widely used in homes, offices, outdoor leisure areas, and various public places. Their core design goal is to minimize their folded size while ensuring structural stability and seating comfort, thus facilitating storage and transportation.

[0003] Existing folding chairs, such as the multi-functional folding chair disclosed in Chinese Patent Publication No. CN220734891U, use a locking mechanism to secure the chair when unfolded. Pulling the reinforcing rod unfolds or folds the first support rod, the second support rod, and the connecting rod, facilitating transportation and carrying. However, it mainly relies on a single-point locking mechanism between the reinforcing rod and the sleeve to withstand the overturning moment from the backrest. The stress point is relatively concentrated, which may cause significant wear to the locking mechanism and the sleeve with long-term use. In addition, the buttons are located low, making operation relatively inconvenient. Furthermore, the second support rod and the reinforcing rod on the backrest are relatively independent, requiring both pushing the reinforcing rod downwards and pulling the second support rod inwards during operation and storage. The smoothness of operation and the support structure could be optimized.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0005] Based on this, this application provides a folding chair to solve one of the aforementioned technical problems.

[0006] The technical solution adopted by this application to solve its technical problem is as follows: a folding chair, comprising: a chair frame body, the chair frame body including a backrest support, a seat support, and a pair of side supports for connecting the backrest support and the seat support, the side supports and the seat support being scissor-like structures that can be folded inwards; the backrest support including a main support rod, a pair of upper connecting rods, a pair of lower connecting rods and a pair of limiting rods, the main support rod having a first connecting seat and a second connecting seat respectively mounted from top to bottom, one end of each of the two upper connecting rods being hinged to both sides of the first connecting seat, and the other end being hinged to the upper part of each of the two side supports; one end of each of the two lower connecting rods being hinged to both sides of the second connecting seat, and the other end being hinged to the lower part of each of the two side supports; one end of each limiting rod being hinged to the bottom of the main support rod, and the other end being hinged to the lower connecting rod; the main support rod having a locking mechanism inside for locking the main support rod to the second connecting seat, and a limiting member on its lower outer wall.

[0007] In some embodiments, both the first connecting seat and the second connecting seat are slidably disposed on the main support rod, wherein the limiting member is used to limit the lowest point of the sliding of the second connecting seat.

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

[0009] In some embodiments, first receiving grooves are formed on both sides of the first connecting seat, and the two connecting rods are respectively hinged inside the first receiving grooves, and the connecting rods can only rotate upward relative to the first connecting seat.

[0010] In some embodiments, the second connecting seat has a second receiving groove on each of its bottom sides, and the two connecting rods are respectively hinged in the second receiving groove. The connecting rods can only rotate downward relative to the second connecting seat.

[0011] In some embodiments, the locking mechanism includes an unlocking button, a drive rod, a mounting sleeve, and a locking pin. The locking pin is slidably disposed within the mounting sleeve, with one end extending laterally out of the mounting sleeve and the other end abutting against a laterally disposed spring. The other end of the spring is fixed within the mounting sleeve.

[0012] In some embodiments, the bottom of the unlock button is provided with the drive rod, and the bottom of the drive rod is provided with a guide member that contacts the locking pin. Both the guide member and the locking pin have mutually cooperating guide slopes. By pressing the unlock button downward, the locking pin is driven to be completely retracted into the mounting sleeve to complete the unlocking.

[0013] In some embodiments, the lower end of the drive rod is provided with a positioning element for limiting the position of the drive rod, the top of the main support rod is provided with a handle, and the unlock button is provided on the lower inner wall of the handle.

[0014] In some embodiments, the main support rod has a through hole at the location of the locking pin, and the second connecting seat has a locking hole with the same diameter as the through hole. The locking pin can be inserted into the through hole and the locking hole to lock the second connecting seat.

[0015] In some embodiments, the side support includes a first side rod and a second side rod that are hinged to each other, wherein the length of the first side rod is greater than that of the second side rod, and a telescopic rod assembly is further provided between the first side rod and the second side rod. The two ends of the telescopic rod assembly are respectively hinged to the first side rod and the second side rod. A roller assembly is further provided at the bottom of the first side rod. The roller assembly is located near the backrest. The side support is hinged to the seat support.

[0016] The beneficial effects of this application are as follows: By simplifying the structure of the chair back support, this application 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 can push the main support rod downwards (at this time, the second connecting seat slides upwards relative to the main support rod), driving the upper connecting rod to bend upwards and deflect, while the lower connecting rod bends downwards under the guidance of the limiting rod. The chair back support is thus retracted inwards, and the scissor-type seat support also retracts inwards simultaneously. Finally, by bringing the chair back support and seat support together, the side supports of the scissor-type structure are driven to move inwards, completing the overall folding and storage. This application has the advantages of simple operation, compact structure, and excellent smoothness, effectively reducing the volume occupied by the chair during transportation and storage. In addition, the locking mechanism and the limiting member jointly lock and support the second connecting seat, reducing the force on the locking mechanism and extending its service life. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the main body of the chair frame in this application.

[0019] Figure 2 This is a three-dimensional schematic diagram of the chair back support of this application.

[0020] Figure 3 This is a three-dimensional schematic diagram of the chair back support of this application from another angle.

[0021] Figure 4 This is a schematic diagram of the main support rod of this application.

[0022] Figure 5 This is a schematic diagram of the locking mechanism in this application.

[0023] Figure 6 This is a schematic diagram showing the connection relationship between the locking pin and the guide in this application.

[0024] Reference numerals: 1. Backrest support; 101. Main support rod; 102. Upper connecting rod; 103. Lower connecting rod; 104. Limiting rod; 2. Seat support; 3. Side support; 301. First side rod; 302. Second side rod; 4. First connecting seat; 5. Second connecting seat; 6. Limiting component; 7. First receiving groove; 8. Second receiving groove; 9. Unlocking button; 10. Drive rod; 11. Mounting sleeve; 12. Locking pin; 13. Spring; 14. Guide component; 15. Guide slope; 16. Positioning component; 17. Handle; 18. Through hole; 19. Locking hole; 20. Telescopic rod assembly; 21. Roller assembly. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.

[0026] In the embodiments of this application, please refer to Figure 1-6As shown, this folding chair mainly includes: a chair frame body, which includes a backrest support 1, a seat support 2, and a pair of side supports 3 for connecting the backrest support 1 and the seat support 2. Both the side supports 3 and the seat support 2 are scissor-like structures that can be folded inwards, i.e., an X-structure hinged together by two rods. The backrest support 1 includes a main support rod 101, a pair of upper connecting rods 102, a pair of lower connecting rods 103, and a pair of limiting rods 104. The main support rod 101 is fitted with a first connecting seat 4 and a second connecting seat 5 from top to bottom. One end of the upper connecting rod 102 is hinged to both sides of the first connecting seat 4, and the other end is hinged to the upper part of the two side brackets 3; one end of the two lower connecting rods 103 is hinged to both sides of the second connecting seat 5, and the other end is hinged to the lower part of the two side brackets 3; one end of the limiting 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; the main support rod 101 is provided with a locking mechanism for locking the main support rod 101 and the second connecting seat 5, and a limiting member 6 is provided on its lower outer wall. The top of the chair frame can be used to install the chair cover. When folding the chair frame, first unlock the second connecting seat 5 by operating the locking mechanism, then press down the main support rod 101 to make the upper connecting rod 102 and the lower connecting rod 103 rotate upward and downward respectively, thus completing the storage of the backrest support 1. While the backrest support 1 is being stored inward, the scissor-structured seat support 2 is also being stored inward at the same time. Finally, the seat support 2 and the backrest support 1 are brought together to complete the overall folding and storage of the chair frame.

[0027] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.

[0028] In one embodiment, both the first connecting seat 4 and the second connecting seat 5 are slidably disposed on the main support rod 101, wherein the limiting member 6 is used to limit the lowest point of the sliding of the second connecting seat 5.

[0029] In another embodiment, the first connecting seat 4 is fixed on the main support rod 101, and the second connecting seat 5 slides up and down on the main support rod 101. The second connecting seat 5 can only slide on the main support rod 101 above the limiting member 6. The limiting member 6 can both position the second connecting seat 5 and support the second connecting seat 5, and distribute the pressure, thereby extending the service life of the locking mechanism.

[0030] like Figure 2As shown, first receiving grooves 7 are formed on both sides of the first connecting seat 4, and the two connecting rods 102 are respectively hinged inside the first receiving grooves 7, and the connecting rods 102 can only rotate upward relative to the first connecting seat 4.

[0031] like Figure 3 As shown, the second connecting seat 5 has a second receiving groove 8 on each of its two bottom sides. The two connecting rods 103 are respectively hinged in the second receiving groove 8. The connecting rods 103 can only rotate downward relative to the second connecting seat 5. When the main support rod 101 is lifted, the connecting rods 103 can deflect downward under the guidance of the limiting rod 104. The end of the limiting rod 104 connected to the main support rod 101 will deflect upward as the main support rod 101 is lifted, thus realizing the overall closing, folding and storage of the chair back support 1.

[0032] like Figure 4-6 As shown, the locking mechanism includes an unlocking button 9, a drive rod 10, a mounting sleeve 11, and a locking pin 12. The locking pin 12 is slidably disposed in the mounting sleeve 11, with one end extending laterally out of the mounting sleeve 11 and the other end abutting against a laterally disposed spring 13. The other end of the spring 13 is fixed inside the mounting sleeve 11.

[0033] Furthermore, the bottom of the unlock button 9 is provided with the drive rod 10, and the bottom of the drive rod 10 is provided with a guide 14 that contacts the locking pin 12. The guide 14 is disposed inside the mounting sleeve 11, and the drive rod 10 extends from the top of the mounting sleeve 11 into the mounting sleeve 11 and contacts the top of the guide 14. Both the guide 14 and the locking pin 12 have mutually cooperating guide slopes 15. By pressing the unlock button 9 downward, the drive rod 10 can apply a downward force to the guide 14, and under the guidance of the guide slope 15, drive the locking pin 12 to be completely housed in the mounting sleeve 11, so that the locking pin 12 is disengaged from the second connecting seat 5 to complete the unlocking.

[0034] Specifically, the lower end of the drive rod 10 is provided with a positioning member 16 for limiting the position of the drive rod 10, the top of the main support rod 101 is provided with a handle 17, and the unlocking button 9 is provided on the lower inner wall of the handle 17. By placing the unlocking button 9 on the handle 17, it is easier to operate the unlocking and locking mechanism, making it more convenient for middle-aged and elderly people to operate and with wider applicability.

[0035] like Figure 4As shown, the main support rod 101 has a through hole 18 at the location of the locking pin 12, and the second connecting seat 5 has a locking hole 19 with the same diameter as the through hole 18. The locking pin 12 can be inserted into the through hole 18 and the locking hole 19 to lock the second connecting seat 5.

[0036] like Figure 1 As shown, the side support 3 includes a first side rod 301 and a second side rod 302 that are hinged to each other. The length of the first side rod 301 is greater than that of the second side rod 302. The top end of the first side rod 301 is located on the side near the backrest support 1, and the top end of the first side rod 301 is at the same height as the top end of the second side rod 302. A telescopic rod assembly 20 is also provided between the first side rod 301 and the second side rod 302. The two ends of the telescopic rod assembly 20 are respectively hinged to the first side rod 301 and the second side rod 302. The telescopic rod assembly 20 is located on the side support 3 near the seat support 2. By extending and retracting the telescopic rod assembly 20, when the backrest support 1 and the seat support 2 are brought together, 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 extends to facilitate the smooth storage and folding of the chair frame body. The bottom of the first side rod 301 is also provided with a roller assembly 21, which is located near the back of the chair. The side bracket 3 and the seat bracket 2 are hinged to each other.

[0037] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known 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.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A folding chair, characterized in that, The chair frame includes a main body, which includes a backrest support, a seat support, and a pair of side supports for connecting the backrest support and the seat support. Both the side supports and the seat support are scissor structures that can be folded inwards. The chair back support includes a main support rod, a pair of upper connecting rods, a pair of lower connecting rods, and a pair of limiting rods. The main support rod is fitted with a first connecting seat and a second connecting seat from top to bottom. One end of each of the two upper connecting rods is hinged to both sides of the first connecting seat, and the other end is hinged to the upper part of the two side supports. One end of each of the two connecting rods is hinged to both sides of the second connecting seat, and the other end is hinged to the lower part of the two side brackets. One end of the limiting rod is hinged to the bottom of the main support rod, and the other end is hinged to the connecting lower rod; The main support rod is equipped with a locking mechanism inside for locking the main support rod to the second connecting seat, and a limit member is provided on its lower outer wall.

2. A folding chair according to claim 1, characterized in that, Both the first connecting seat and the second connecting seat are slidably mounted on the main support rod, wherein the limiting member is used to limit the lowest point of the sliding of the second connecting seat.

3. A folding chair according to claim 1, characterized in that, The first connecting seat is fixed on the main support rod, and the second connecting seat slides up and down on the main support rod, wherein the second connecting seat can only slide on the main support rod above the limiting member.

4. A folding chair according to claim 2 or 3, characterized in that, The first connecting seat has a first receiving groove formed on both sides, and the two connecting rods are respectively hinged inside the first receiving groove, and the connecting rods can only rotate upward relative to the first connecting seat.

5. A folding chair according to claim 2 or 3, characterized in that, The second connecting seat has a second receiving groove on each of its two bottom sides. The two connecting rods are respectively hinged in the second receiving groove. The connecting rods can only rotate downward relative to the second connecting seat.

6. A folding chair according to claim 1, characterized in that, The locking mechanism includes an unlocking button, a drive rod, a mounting sleeve, and a locking pin. The locking pin is slidably disposed within the mounting sleeve, with one end extending laterally out of the mounting sleeve and the other end abutting against a laterally disposed spring. The other end of the spring is fixed within the mounting sleeve.

7. A folding chair according to claim 6, characterized in that, The unlock button has a drive rod at its bottom, and a guide member that contacts the locking pin at its bottom. Both the guide member and the locking pin have mutually cooperating guide slopes. By pressing the unlock button downwards, the locking pin is driven to be completely retracted into the mounting sleeve to complete the unlocking process.

8. A folding chair according to claim 7, characterized in that, The lower end of the drive rod is provided with a positioning element for limiting the position of the drive rod, the top of the main support rod is provided with a handle, and the unlock button is located on the lower inner wall of the handle.

9. A folding chair according to claim 7, characterized in that, The main support rod has a through hole at the location of the locking pin, and the second connecting seat has a locking hole with the same diameter as the through hole. The locking pin can be inserted into the through hole and the locking hole to lock the second connecting seat.

10. A folding chair according to claim 1, characterized in that, The side support includes a first side rod and a second side rod that are hinged to each other. The length of the first side rod is greater than that of the second side rod. A telescopic rod assembly is also provided between the first side rod and the second side rod. The two ends of the telescopic rod assembly are respectively hinged to the first side rod and the second side rod. A roller assembly is also provided at the bottom of the first side rod. The roller assembly is located near the backrest. The side support is hinged to the seat support.

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