Folding chair unlocking device and folding chair with same

Abstract

The utility model discloses an unlocking device of a folding chair and the folding chair with the unlocking device. The folding chair comprises a chair surface, an unlocking device and an unlocking device, the foldable chair frame comprises a rear supporting seat; a left front supporting seat and a right front supporting seat; a left connecting rod and a right connecting rod; a left front connecting rod and a right front connecting rod; the right end of the rotary connecting piece is fixedly connected with the left end of the right front connecting rod; the ratchet wheel is rotationally connected with the left end of the rotary connecting piece, only one part of the periphery of the ratchet wheel is provided with teeth, and the ratchet wheel is fixedly connected with the right end of the left front connecting rod; one end of the elastic piece is connected with the rotary connecting piece; one end of the unlocking handle is rotationally connected with the rotary connecting piece, a pawl capable of being meshed with the teeth on the ratchet wheel is arranged on the unlocking handle, and the other end of the elastic piece abuts against the other end of the unlocking handle. The folding chair disclosed by the utility model can solve the problem that great strength is needed in the folding chair assembly and storage process.

Description

Technical Field

[0001] The utility model relates to the technical field of chairs, and more specifically to a folding chair unlocking device and a folding chair with the unlocking device. Background Art

[0002] Folding chairs, as a lightweight and foldable seat, have been widely used in people's daily lives. Folding chairs are easy to move and can save space. For example, Chinese utility model patent CN 220141181 U discloses a folding space chair, which includes a seat and a foldable chair frame. This structure has good stability. However, due to the large friction generated by the elastic self-locking member and the inner shell of the first opening groove, greater force is required during the operation of unfolding and folding, which is not conducive to assembly and causes difficulty in operation. Utility Model Content

[0003] The utility model aims to provide a folding chair unlocking device and a folding chair with the unlocking device, which can solve the problem of requiring greater force in the process of assembling and storing the folding chair by designing a ratchet and pawl mechanism.

[0004] In order to achieve these purposes and other advantages of the utility model, a folding chair unlocking device is provided, the chair frame of the folding chair includes a front connecting rod, the front connecting rod includes a left front connecting rod and a right front connecting rod, and the unlocking device includes:

[0005] A swivel connector, the right end of which is fixedly connected to the left end of the right front connecting rod, and the right end of the left front connecting rod abuts against or contacts the left front side of the swivel connector;

[0006] A ratchet wheel, which is rotatably connected to the left end of the rotating connector, only a portion of the outer circumference of the ratchet wheel has teeth, and the ratchet wheel is fixedly connected to the right end of the left front connecting rod;

[0007] An elastic member, one end of which is connected to and abuts against the rotating connecting member;

[0008] An unlocking handle, one end of which is rotatably connected to the rotating connecting member, and is provided with a pawl meshing with the teeth on the ratchet; the other end of the elastic member abuts against the other end of the unlocking handle, and drives the pawl to abut against the teeth on the ratchet, and restricts the ratchet from rotating counterclockwise; when the other end of the unlocking handle is pressed, the pawl can disengage from the teeth on the ratchet, and the ratchet can rotate counterclockwise.

[0009] Preferably, in the unlocking device for a folding chair, the interior of the rotating connector is hollow and open on the left, right and front sides; the left ends of the ratchet and the unlocking handle are rotatably connected to the top and bottom of the rotating connector via the first and second shafts respectively; the left end of the right front connecting rod is fixedly connected to the top and bottom of the rotating connector; when the pawl abuts against the teeth on the ratchet, the rotating connector extends along the length direction of the front connecting rod; the ratchet, pawl, unlocking handle, elastic member, the right end of the left front connecting rod and the left end of the right front connecting rod are all located in the rotating connector; the unlocking handle is located between the ratchet and the right front connecting rod, and the teeth on the ratchet are located right rearward of the ratchet.

[0010] Preferably, in the unlocking device for a folding chair, the elastic member is a spring.

[0011] Preferably, in the unlocking device for the folding chair, the left front connecting rod and the right front connecting rod are coaxially arranged.

[0012] Preferably, in the unlocking device for the folding chair, a limiting rod is provided on the front side of the rotating connecting member, and when the ratchet pawl contacts the limiting rod, the ratchet pawl meshes with the teeth on the ratchet wheel.

[0013] A folding chair with an unlocking device, characterized by comprising:

[0014] Seat;

[0015] A foldable chair frame, a seat surface is arranged on the foldable chair frame, and the foldable chair frame comprises:

[0016] rear support seat;

[0017] Two front support seats, including a left front support seat and a right front support seat, wherein the left front support seat and the right front support seat are symmetrically arranged in front of the rear support seat;

[0018] Two side connecting rods, including a left connecting rod and a right connecting rod, the two ends of the left connecting rod are respectively rotatably connected to the rear support seat and the left front support seat, and the two ends of the right connecting rod are respectively rotatably connected to the rear support seat and the right front support seat;

[0019] The front connecting rod comprises a left front connecting rod and a right front connecting rod, wherein the left end of the left front connecting rod is rotatably connected to the left front supporting seat, and the right end of the right front connecting rod is rotatably connected to the right front supporting seat;

[0020] A swivel connector, the right end of which is fixedly connected to the left end of the right front connecting rod, and the right end of the left front connecting rod abuts against or contacts the left front side of the swivel connector;

[0021] A ratchet wheel, which is rotatably connected to the left end of the rotating connector, only a portion of the outer circumference of the ratchet wheel has teeth, and the ratchet wheel is fixedly connected to the right end of the left front connecting rod;

[0022] An elastic member, one end of which is connected to and abuts against the rotating connecting member;

[0023] An unlocking handle, one end of which is rotatably connected to the rotating connecting member, and is provided with a pawl meshing with the teeth on the ratchet; the other end of the elastic member abuts against the other end of the unlocking handle, and drives the pawl to abut against the teeth on the ratchet, and restricts the ratchet from rotating counterclockwise; when the other end of the unlocking handle is pressed, the pawl can disengage from the teeth on the ratchet, and the ratchet can rotate counterclockwise.

[0024] Preferably, in the folding chair with an unlocking device, the interior of the rotating connector is hollow and open on the left, right and front sides; the left ends of the ratchet and the unlocking handle are rotatably connected to the top and bottom of the rotating connector via the first and second shafts respectively; the left end of the right front connecting rod is fixedly connected to the top and bottom of the rotating connector; when the pawl abuts against the teeth on the ratchet, the rotating connector extends along the length direction of the front connecting rod; the ratchet, pawl, unlocking handle, elastic member, the right end of the left front connecting rod and the left end of the right front connecting rod are all located in the rotating connector; the unlocking handle is located between the ratchet and the right front connecting rod, and the teeth on the ratchet are located right rear of the ratchet.

[0025] Preferably, in the folding chair with an unlocking device, the elastic member is a spring.

[0026] Preferably, in the folding chair with an unlocking device, the left front connecting rod and the right front connecting rod are coaxially arranged.

[0027] Preferably, in the folding chair with an unlocking device, a limiting rod is provided on the front side of the rotating connector, and when the pawl contacts the limiting rod, the pawl meshes with the teeth on the ratchet wheel.

[0028] The utility model at least has the following beneficial effects:

[0029] After the portable folding chair support frame of the present application is opened, the teeth and pawls on the ratchet will automatically engage when the rotating connecting piece is pulled forward, so that the six degrees of freedom of the left front connecting rod and the right front connecting rod are restricted. At this time, the foldable chair support frame forms a stable triangular structure and cannot be folded, thereby avoiding the accidental folding of the foldable chair during use, and thus has the advantages of good stability and high safety.

[0030] When the folding chair support frame of the present application is in the unfolded state, the left front connecting rod and the right front connecting rod are in the same straight line and level with the rotating connecting piece. Therefore, when the rotating connecting piece needs to be unlocked for storage, the unlocking handle only needs to be gently pressed to push the rotating connecting rod to drive the left front connecting rod and the right front connecting rod to be retracted toward the rear support seat. Therefore, it has the advantages of easy and convenient operation and labor saving.

[0031] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a front perspective structural diagram of a foldable chair frame according to an embodiment of the utility model;

[0033] Figure 2 is a side view of a foldable chair frame according to an embodiment of the utility model;

[0034] Figure 3 is a structural schematic diagram of a foldable chair frame in an unfolded state according to an embodiment of the utility model;

[0035] Figure 4 is a structural schematic diagram of a foldable chair frame during folding according to an embodiment of the utility model;

[0036] Figure 5 is a structural schematic diagram of a folded state of a foldable chair frame according to an embodiment of the utility model;

[0037] Figure 6 is a schematic structural diagram of an unlocking device according to an embodiment of the utility model;

[0038] Figure 7 It is a structural schematic diagram of a folding chair according to an embodiment of the utility model;

[0039] Figure 8 is a schematic diagram of the three-dimensional structure of an unlocking device according to an embodiment of the utility model;

[0040] Explanation of the accompanying drawings in the specification:

[0041] 1-foldable chair frame; 2. Seat seat; 11-rear support seat; 12-front support seat; 121-left front support seat; 122-right front support seat; 13-side connecting rod; 131-left connecting rod; 132-right connecting rod; 14-front connecting rod; 141-left front connecting rod; 142-right front connecting rod; 15-rotating connecting member; 151-top of rotating connecting member; 152-bottom of rotating connecting member; 16-ratchet; 161-teeth on ratchet; 162-first shaft; 17-elastic member; 18-unlocking handle; 181-second shaft; 19-pawl; 20-limiting rod. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0043] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] like Figures 1 to 8 As shown, the utility model provides a folding chair unlocking device, the chair frame of the folding chair includes a front connecting rod 14, the front connecting rod 14 includes a left front connecting rod 141 and a right front connecting rod 142, as shown in FIG. Figure 3-6 As shown, the left front connecting rod 141 is located on the left side, and the right front connecting rod 142 is located on the right side. The unlocking device includes:

[0045] The right end of the rotating connecting member 15 is fixedly connected to the left end of the right front connecting rod 142, and the right end of the left front connecting rod 141 abuts against or contacts the left front side of the rotating connecting member 15;

[0046] A ratchet 16, which is rotatably connected to the left end of the rotating connector 15, and the ratchet 16 can rotate in the horizontal direction around the rotation center, and only a part of the outer circumference of the ratchet 16 has teeth. The ratchet 16 is fixedly connected to the right end of the left front connecting rod 141;

[0047] An elastic member 17, one end of which is connected to the rotating connecting member 15 and abuts against it;

[0048] The unlocking handle 18 has one end rotatably connected to the rotating connector 15. One end of the unlocking handle 18 can rotate in the horizontal direction, and a pawl 19 meshing with the teeth 161 on the ratchet is provided thereon. The other end of the elastic member 17 abuts against the other end of the unlocking handle 18, and drives the pawl 19 to abut against the teeth 161 on the ratchet, and restricts the ratchet 16 from rotating counterclockwise. When the other end of the unlocking handle 18 is pressed, the pawl 19 rotates in the counterclockwise direction, thereby disengaging from the teeth 161 on the ratchet, so that the ratchet 16 can rotate counterclockwise. When the unlocking handle 18 is pressed to rotate the pawl 19, the ratchet 16 and the teeth thereon do not interfere with the rotation of the pawl 19.

[0049] The folding chair unlocking device provided by the present invention uses a ratchet 16 lacking teeth and a pawl 19 to form a mechanism that allows the ratchet 16 to rotate in one direction (clockwise) while being restricted in another direction (counterclockwise). When the unlocking handle 18 is pressed to make the pawl 19 rotate counterclockwise by a certain angle, the pawl 19 is separated from the restricted area of ​​the ratchet 16, and the ratchet 16 can rotate counterclockwise without the restriction of the pawl 19. When the left front connecting rod 141 contacts the inner surface (left front side) of the rotating connector 15, the clockwise movement of the left front connecting rod 141 is restricted, so that the clockwise movement of the ratchet 16 is also restricted.

[0050] In another embodiment, in the unlocking device for a folding chair, the interior of the rotating connector 15 is hollow, and the left and right sides and the front side are open. The left ends of the ratchet 16 and the unlocking handle 18 are rotatably connected to the top 151 and the bottom 152 of the rotating connector through the first shaft 162 and the second shaft 181, respectively. The right end of the unlocking handle 18 abuts against the elastic member 17. The left end of the right front connecting rod 142 is fixedly connected to the top 151 and the bottom of the rotating connector. The right end of the left front connecting rod 141 passes through the left side of the rotating connector 15 and is fixedly connected to the ratchet 16. The left end of the right front connecting rod 142 passes through the right side of the rotating connecting member 15 and is fixedly connected to the right end of the rotating connecting member 15; when the pawl 19 abuts against the tooth 161 on the ratchet, the rotating connecting member 15 extends along the length direction of the front connecting rod 14, and the ratchet 16, pawl 19, unlocking handle 18, elastic member 17, the right end of the left front connecting rod 141 and the left end of the right front connecting rod 142 are all located in the rotating connecting member 15, the unlocking handle 18 is located between the ratchet 16 and the right front connecting rod 142, and the tooth 161 on the ratchet is located to the right rear of the ratchet 16.

[0051] In another embodiment, in the unlocking device for a folding chair, the elastic member 17 is a spring.

[0052] In another embodiment, in the unlocking device for the folding chair, the left front connecting rod 141 and the right front connecting rod 142 are coaxially arranged.

[0053] In another embodiment, in the folding chair unlocking device, a limit rod 20 is provided on the front side of the rotating connector 15, and when the pawl 19 contacts the limit rod 20, the pawl 19 meshes with the teeth 161 on the ratchet wheel. The limit rod 20 does not interfere with the rotation of the ratchet wheel 16.

[0054] A folding chair with an unlocking device, comprising:

[0055] The seat surface 2 is arranged in the same manner as in the existing patent CN 220141181 U;

[0056] A foldable chair frame 1, comprising:

[0057] A rear support seat 11, to which two upper support rods and two lower foot rods are detachably connected;

[0058] Two front support seats 12, including a left front support seat 121 and a right front support seat 122, as shown in FIG. Figure 3-5 As shown, the left front support seat 121 is located on the left side, and the right front support seat 122 is located on the right side. The left front support seat 121 and the right front support seat 122 are symmetrically arranged in front of the rear support seat 11. The two front support seats 12 are respectively detachably connected with an upper support rod and a lower foot rod, and the seat surface 2 is detachably mounted on the upper support rods of the rear support seat 11 and the two front support seats 12;

[0059] Two side connecting rods 13, including a left connecting rod 131 and a right connecting rod 132, as shown in FIG. Figure 3-5 As shown, the left side is the left connecting rod 131, and the right side is the right connecting rod 132. The two ends of the left connecting rod 131 are rotatably connected to the rear support seat 11 and the left front support seat 121 respectively, and the two ends of the right connecting rod 132 are rotatably connected to the rear support seat 11 and the right front support seat 122 respectively.

[0060] The front connecting rod 14 includes a left front connecting rod 141 and a right front connecting rod 142. The left end of the left front connecting rod 141 is rotatably connected to the left front supporting seat 121, and the left end of the left front connecting rod 141 rotates around the second rotation center. The right end of the right front connecting rod 142 is rotatably connected to the right front supporting seat 122, and the right end of the right front connecting rod 142 rotates around the third rotation center.

[0061] The right end of the rotating connector 15 is fixedly connected to the left end of the right front connecting rod 142, and the right end of the left front connecting rod 141 abuts against or contacts the left front side of the rotating connector;

[0062] A ratchet 16, which is rotatably connected to the left end of the rotating connector 15, and the ratchet 16 can rotate in the horizontal direction around the rotation center, and only a part of the outer circumference of the ratchet 16 has teeth. The ratchet 16 is fixedly connected to the right end of the left front connecting rod 141;

[0063] An elastic member 17, one end of which is connected to the rotating connecting member 15 and abuts against it;

[0064] The unlocking handle 18 has one end rotatably connected to the rotating connector 15. One end of the unlocking handle 18 can rotate in the horizontal direction, and a pawl 19 meshing with the teeth 161 on the ratchet is provided thereon. The other end of the elastic member 17 abuts against the other end of the unlocking handle 18, and drives the pawl 19 to abut against the teeth 161 on the ratchet, and restricts the ratchet 16 from rotating counterclockwise. When the other end of the unlocking handle 18 is pressed, the pawl 19 rotates in the counterclockwise direction, thereby disengaging from the teeth 161 on the ratchet, so that the ratchet 16 can rotate counterclockwise. When the unlocking handle 18 is pressed to rotate the pawl 19, the ratchet 16 and the teeth thereon do not interfere with the rotation of the pawl 19.

[0065] The folding chair provided by the present invention comprises a rear support seat 11, a left front support seat 121 and a right front support seat 122. The left front support seat 121 and the right front support seat 122 are respectively connected to the rear support seat 11 by a left connecting rod 131 and a right connecting rod 132 through rivets (axes). Both the left connecting rod 131 and the right connecting rod 132 can rotate relative to the rear support seat 11 around the rivet (axle). A left front connecting rod 141 is connected to the left front support seat 121 through a rivet (axle). The left front connecting rod 141 can rotate relative to the left front support seat 121. The ratchet 16 lacking teeth is connected and fixed to the left front connecting rod 16 through an elastic pin. On the connecting rod 141, the ratchet 16 without teeth cannot make any movement relative to the left front connecting rod 141; there is a right front connecting rod 142 connected to the right front support seat 122 by a rivet (axis), and the right front connecting rod 142 can rotate relative to the right front support seat 122. There is a rotating connector 15 fixed to the other end of the right front connecting rod 142 by two rivets, and the rotating connector 15 cannot make any movement relative to the right front connecting rod 142; the ratchet 16 without teeth is connected to the rotating connector 15 by a rivet (axis), and the ratchet 16 without teeth can rotate relative to the rotating connector 15; the pawl 19 is connected to the unlocking handle 1 8 is made into one piece by rubber encapsulation to form an unlocking assembly, which is connected to the rotating connector 15 by a rivet (axis). The unlocking assembly can rotate relative to the rotating connector 15. There is a pressure spring on the back of the unlocking handle 18 on the unlocking assembly, and the other end of the pressure spring presses the inner surface of the rotating connector 15. Since the pressure spring presses the unlocking handle 18, the unlocking assembly has a tendency to move clockwise. When the folding chair support frame is in the unfolded state, the remaining teeth of the ratchet 16 without teeth are in a bite state with the teeth of the pawl 19. At this time, the counterclockwise movement of the ratchet 16 without teeth is restricted by the pawl 19 and cannot move counterclockwise. At this time, the left front connecting rod 141 is in contact with the inner surface (left front side) of the rotating connecting member 15, so that the counterclockwise movement of the left front connecting rod 141 relative to the left front supporting seat 121 is restricted. Therefore, the left front connecting rod 141 cannot move counterclockwise at this time. Finally, the left front connecting rod 141 and the right front connecting rod 142 are coaxial, and the six degrees of freedom of the left front connecting rod 141 and the right front connecting rod 142 are restricted, so that the left connecting rod 131 and the right connecting rod 132 and the front connecting rod 14 coaxially formed by the left front connecting rod 141 and the right front connecting rod 142 form a stable triangular structure, which greatly improves the stability of the chair.

[0066] When the chair needs to be stored, it is only necessary to press the unlocking handle 18 to drive the unlocking assembly to move counterclockwise so that the pawl 19 disengages from the area that restricts the counterclockwise movement of the ratchet 16 without teeth, and finally the ratchet 16 without teeth can move counterclockwise. At this time, gently push the rotating connector 15 toward the rear support seat 11. Since the teeth of the ratchet 16 without teeth are missing, as long as the ratchet 16 without teeth rotates a certain angle, even if the unlocking handle 18 is no longer pressed, after the unlocking handle 18 is reset, the ratchet 16 without teeth is now missing at the part where the ratchet 16 engages with the pawl 19, so that the pawl 19 can no longer engage with the ratchet 16 without teeth, and finally the counterclockwise movement of the ratchet 16 without teeth is no longer restricted, thereby achieving the effect of chair storage.

[0067] When the chair needs to be unfolded and assembled, first, the left front support seat 121 and the right front support seat 122 are grasped by the left and right hands respectively, and the left and right front support seats 121 and 122 are respectively opened to the left and right at a certain angle. Then, one hand grasps the left front support seat 121 or the right front support seat 122, and the other hand grasps the rotating connection member 15 and pulls it forward. At this time, the ratchet wheel 16 without teeth moves clockwise, and the clockwise movement of the ratchet wheel 16 without teeth is not restricted by the pawl 19 until the left front connecting rod 141 contacts the inner surface (left front side) of the rotating connection member 15. This is because, after the left front connecting rod 141 contacts the left front side of the rotating connection member 15, If the ratchet 16 continues to move clockwise around its rotation center one, the left end of the left front connecting rod 141 needs to move clockwise around its rotation center two, and the right end of the right front connecting rod 142 needs to move counterclockwise around the rotation center three. However, at this time, the left front connecting rod 141 has already contacted the left front side of the rotating connector 15. When the right front connecting rod 142 moves counterclockwise around the rotation center three, the contact point between the left front connecting rod 141 and the rotating connector 15 needs to move forward, and the existence of the left front connecting rod 141 limits the forward movement of the contact point between the two, so the ratchet 16 can no longer continue to move clockwise. The clockwise movement of the left front connecting rod 141 is restricted, so that the clockwise movement of the ratchet wheel 16 without teeth is also restricted. At this time, the remaining teeth of the ratchet wheel 16 without teeth are engaged with the pawl 19, so the counterclockwise movement of the ratchet wheel 16 without teeth is also restricted. The final result is that the six degrees of freedom of the left front connecting rod 141 and the right front connecting rod 142 are all restricted, so that the left connecting rod 131 and the right connecting rod 132 and the front connecting rod 14 coaxially formed by the left front connecting rod 141 and the right front connecting rod 142 form a stable triangular structure, and the chair achieves the purpose of unfolding.

[0068] In another embodiment, in the folding chair with an unlocking device, the interior of the rotating connector 15 is hollow, and the left and right sides and the front side are open. The left ends of the ratchet 16 and the unlocking handle 18 are rotatably connected to the top 151 of the rotating connector and the bottom 152 of the rotating connector through the first shaft 162 and the second shaft 181, respectively. The right end of the unlocking handle 18 is against the elastic member 17. The left end of the right front connecting rod 142 is fixedly connected to the top 151 of the rotating connector and the bottom 152 of the rotating connector. The right end of the left front connecting rod 141 passes through the left side of the rotating connector 15 and is connected to the ratchet 1 6 is fixedly connected, the left end of the right front connecting rod 142 passes through the right side of the rotating connecting member 15 and is fixedly connected to the right end of the rotating connecting member 15; when the pawl 19 abuts against the teeth 161 on the ratchet, the rotating connecting member 15 extends along the length direction of the front connecting rod 14, the ratchet 16, the pawl 19, the unlocking handle 18, the elastic member 17, the right end of the left front connecting rod 141 and the left end of the right front connecting rod 142 are all located in the rotating connecting member 15, the unlocking handle 18 is located between the ratchet 16 and the right front connecting rod 142, and the teeth 161 on the ratchet are located to the right rear of the ratchet 16.

[0069] In another embodiment, in the folding chair with an unlocking device, the elastic member 17 is a spring.

[0070] In another embodiment, in the folding chair with an unlocking device, the left front connecting rod 141 and the right front connecting rod 142 are coaxially arranged.

[0071] In another embodiment, in the folding chair with unlocking device, a limiting rod 20 is provided on the front side of the rotating connecting member 15, and when the pawl 19 contacts the limiting rod 20, the pawl 19 is engaged with the teeth 161 on the ratchet wheel. The limiting rod 20 does not interfere with the rotation of the ratchet wheel 16. When the folding chair is in the unfolded state, the pawl 19 has a tendency to move clockwise under the action of the spring, and the limiting rod 20 can limit the pawl 19 from moving clockwise.

[0072] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A folding chair unlocking device, wherein the chair frame of the folding chair comprises a front connecting rod, wherein the front connecting rod comprises a left front connecting rod and a right front connecting rod, wherein: The unlocking device includes: A swivel connector, the right end of which is fixedly connected to the left end of the right front connecting rod, and the right end of the left front connecting rod abuts against or contacts the left front side of the swivel connector; A ratchet wheel, which is rotatably connected to the left end of the rotating connector, only a portion of the outer circumference of the ratchet wheel has teeth, and the ratchet wheel is fixedly connected to the right end of the left front connecting rod; An elastic member, one end of which is connected to and abuts against the rotating connecting member; An unlocking handle, one end of which is rotatably connected to the rotating connecting member, and is provided with a pawl meshing with the teeth on the ratchet; the other end of the elastic member abuts against the other end of the unlocking handle, and drives the pawl to abut against the teeth on the ratchet, and restricts the ratchet from rotating counterclockwise; when the other end of the unlocking handle is pressed, the pawl can disengage from the teeth on the ratchet, and the ratchet can rotate counterclockwise.

2. The folding chair unlocking device according to claim 1, characterized in that: The interior of the rotating connector is hollow, and the left, right and front sides are open. The left ends of the ratchet and the unlocking handle are rotatably connected to the top and bottom of the rotating connector via the first and second shafts respectively. When the pawl abuts against the teeth on the ratchet, the rotating connector extends along the length direction of the front connecting rod. The ratchet, pawl, unlocking handle, elastic member, the right end of the left front connecting rod and the left end of the right front connecting rod are all located in the rotating connector. The unlocking handle is located between the ratchet and the right front connecting rod, and the teeth on the ratchet are located to the right rear of the ratchet.

3. The folding chair unlocking device according to claim 1, characterized in that: The elastic member is a spring.

4. The folding chair unlocking device according to claim 2, characterized in that: The left front connecting rod and the right front connecting rod are coaxially arranged.

5. The folding chair unlocking device according to claim 2, characterized in that: A limiting rod is arranged on the front side of the rotating connecting member. When the ratchet pawl contacts the limiting rod, the ratchet pawl meshes with the teeth on the ratchet wheel.

6. A folding chair having an unlocking device according to claim 1, characterized in that: Also includes: Seat; A foldable chair frame, a seat surface is arranged on the foldable chair frame, and the foldable chair frame comprises: rear support seat; Two front support seats, including a left front support seat and a right front support seat, the left front support seat and the right front support seat are symmetrically arranged in front of the rear support seat; the left end of the left front connecting rod is rotatably connected to the left front support seat, and the right end of the right front connecting rod is rotatably connected to the right front support seat; The two side connecting rods include a left connecting rod and a right connecting rod, wherein the two ends of the left connecting rod are rotatably connected to the rear support seat and the left front support seat respectively, and the two ends of the right connecting rod are rotatably connected to the rear support seat and the right front support seat respectively.

7. The folding chair with unlocking device according to claim 6, characterized in that: The interior of the rotating connector is hollow, and the left, right and front sides are open. The left ends of the ratchet and the unlocking handle are rotatably connected to the top and bottom of the rotating connector via the first and second shafts respectively. When the pawl abuts against the teeth on the ratchet, the rotating connector extends along the length direction of the front connecting rod. The ratchet, pawl, unlocking handle, elastic member, the right end of the left front connecting rod and the left end of the right front connecting rod are all located in the rotating connector. The unlocking handle is located between the ratchet and the right front connecting rod, and the teeth on the ratchet are located to the right rear of the ratchet.

8. The folding chair with unlocking device according to claim 6, characterized in that: The elastic member is a spring.

9. The folding chair with unlocking device according to claim 7, characterized in that: The left front connecting rod and the right front connecting rod are coaxially arranged.

10. The folding chair with unlocking device according to claim 7, characterized in that: A limiting rod is arranged on the front side of the rotating connecting member. When the ratchet pawl contacts the limiting rod, the ratchet pawl meshes with the teeth on the ratchet wheel.

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