A folding chair frame and a folding chair

Abstract

This utility model provides a folding chair frame and a folding chair, relating to the field of folding chair technology. The folding chair frame includes a front leg tube, a rear leg tube, a front support tube, a rear support tube, a front connecting seat, a rear connecting seat, and an intermediate connecting member. One end of the intermediate connecting member is connected to the front connecting seat, and the other end is connected to the rear connecting seat. The front leg tube is rotatably connected to the front connecting seat, and the front support tube is rotatably connected to the front leg tube, and the front support tube can rotate towards or away from the front leg tube. The rear leg tube is rotatably connected to the rear connecting seat, and the rear support tube is rotatably connected to the rear leg tube, and the rear support tube can rotate towards or away from the rear leg tube. Through this design, when the folding chair frame is not in use, the front leg tube, rear leg tube, front support tube, and rear support tube can be folded up as much as possible, reducing the overall volume of the folding chair frame, thus facilitating packing or carrying and improving convenience.

Description

Technical Field

[0001] This utility model relates to the field of folding chair technology, and more specifically, to a folding chair frame and a folding chair. Background Technology

[0002] Because folding chairs are small and easy to carry, people are willing to bring them when they go on outdoor leisure and travel.

[0003] However, although various folding chairs in related technologies are space-saving, they are still quite large when folded, making them inconvenient to carry, especially when going out, on outings, or queuing. Utility Model Content

[0004] This utility model provides a folding chair frame and a folding chair, which can be folded up as much as possible when not in use, so as to reduce the overall volume of the folding chair frame, thereby making it convenient to pack or carry and improving convenience.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] An embodiment of this utility model provides a folding chair frame, which includes:

[0007] Front leg tube, rear leg tube, front support tube, rear support tube, front connecting seat, rear connecting seat and intermediate connecting parts;

[0008] One end of the intermediate connector is connected to the front connector, and the other end of the intermediate connector is connected to the rear connector.

[0009] The front leg tube is rotatably connected to the front connecting seat, and the front support tube is rotatably connected to the front leg tube, and the front support tube can rotate toward or away from the front leg tube; the rear leg tube is rotatably connected to the rear connecting seat, and the rear support tube is rotatably connected to the rear leg tube, and the rear support tube can rotate toward or away from the rear leg tube.

[0010] In an optional embodiment, the folding chair frame further includes a front adapter, and the front leg tube is rotatably connected to the front connecting seat through the front adapter. The front leg tube can rotate toward the connecting plane of the front connecting seat or away from the connecting seat.

[0011] And / or, the folding chair frame further includes a rear adapter, through which the rear leg tube is rotatably connected to the rear connecting seat, and the rear leg tube can rotate toward or away from the connecting plane of the rear connecting seat.

[0012] In an optional embodiment, the front adapter can rotate horizontally about an axis perpendicular to the connecting plane of the front connector.

[0013] And / or, the rear adapter can rotate horizontally about an axis perpendicular to the connection plane of the rear connector.

[0014] In an optional embodiment, the front adapter includes a first adapter and a second adapter, the front leg tube is rotatably connected to the front connecting seat through the first adapter, and the front support tube is rotatably connected to the front leg tube through the second adapter.

[0015] And / or, the rear adapter includes a third adapter and a fourth adapter, the rear leg tube is rotatably connected to the rear connecting seat through the third adapter, and the rear support tube is rotatably connected to the rear leg tube through the fourth adapter.

[0016] In an optional embodiment, the first adapter can rotate about an axis parallel to the connecting plane of the front connector, so that the front support tube and the front foot tube rotate toward or away from the rear connector; and / or, the first adapter can rotate horizontally about an axis perpendicular to the connecting plane of the front connector.

[0017] Alternatively, the third adapter can rotate about an axis parallel to the connecting plane of the rear connector, so that the rear support tube and the rear foot tube rotate toward or away from the front connector; and / or, the third connector can rotate horizontally about an axis perpendicular to the connecting plane of the rear connector.

[0018] In an optional embodiment, the front leg tube is riveted to the first adapter, and the front support tube is riveted to the second adapter.

[0019] And / or, the rear leg tube is riveted to the third adapter, and the rear support tube is riveted to the fourth adapter.

[0020] In an optional embodiment, the second adapter is provided with a first limiting structure, which is used to limit the rotation angle of the front support tube.

[0021] And / or, the fourth adapter is provided with a second limiting structure, which is used to limit the rotation angle of the rear support tube.

[0022] In an optional embodiment, the folding chair frame further includes a front telescopic tube and a rear telescopic tube, the front telescopic tube being sleeved on the front support tube and being telescopic relative to the front support tube; the rear telescopic tube being sleeved on the rear support tube and being telescopic relative to the rear support tube.

[0023] In an optional embodiment, the front telescopic tube and the rear telescopic tube are respectively provided with a locking mechanism, which is used to selectively fix the relative telescopic position of the front telescopic tube and the front support tube or to selectively fix the relative telescopic position of the rear telescopic tube and the rear support tube.

[0024] An embodiment of this utility model also provides a folding chair, including a seat and a folding chair frame as described in any of the above embodiments, wherein the seat is detachably connected to the front support tube and the rear support tube respectively.

[0025] The beneficial effects of the folding chair frame and folding chair according to the embodiments of this utility model include, for example:

[0026] The folding chair frame includes a front leg tube, a rear leg tube, a front support tube, a rear support tube, a front connecting seat, a rear connecting seat, and a middle connector. One end of the middle connector is connected to the front connecting seat, and the other end is connected to the rear connecting seat. The front leg tube is rotatably connected to the front connecting seat, and the front support tube is rotatably connected to the front leg tube, and the front support tube can rotate towards or away from the front leg tube. The rear leg tube is rotatably connected to the rear connecting seat, and the rear support tube is rotatably connected to the rear leg tube, and the rear support tube can rotate towards or away from the rear leg tube. Through this design, when the folding chair frame is not in use, the front leg tube, rear leg tube, front support tube, and rear support tube can be folded up as much as possible, reducing the overall size of the folding chair frame, thus facilitating packing or carrying and improving convenience. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram showing the folding chair frame in its open state as provided in an embodiment of this utility model;

[0029] Figure 2 This is a schematic diagram of the folded state of the folding chair frame provided in an embodiment of this utility model;

[0030] Figure 3 This is a schematic diagram of the folded state of the folding chair frame provided in an embodiment of this utility model;

[0031] Figure 4 This is a schematic diagram of the folding chair frame structure in the open state provided in an embodiment of this utility model;

[0032] Figure 5This is a schematic diagram of the folded state of the folding chair frame structure provided in an embodiment of this utility model;

[0033] Figure 6 This is a schematic diagram of the folded state of the folding chair frame structure provided in an embodiment of this utility model.

[0034] Icons: 1000 - Folding chair frame; 100 - Front leg tube; 200 - Rear leg tube; 300 - Front support tube; 400 - Rear support tube; 500 - Front connector; 600 - Rear connector; 700 - Intermediate connector; 810 - Front adapter; 811 - First adapter; 812 - Second adapter; 820 - Rear adapter; 821 - Third adapter; 822 - Fourth adapter; 910 - Front telescopic tube; 920 - Rear telescopic tube. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0040] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0041] Because folding chairs are small and easy to carry, people are willing to bring them along when they are enjoying outdoor leisure and travel. However, although various folding chairs in related technologies are space-saving, they are still quite large when folded, making them inconvenient to carry, especially when going out, on outings, or while queuing.

[0042] Based on this, please refer to Figures 1-3 The folding chair frame 1000 provided in the embodiments of this utility model can effectively improve the aforementioned technical problems. The folding chair frame 1000 can be folded up as much as possible when not in use, thereby reducing the overall volume of the folding chair frame 1000, facilitating packing or carrying, and improving convenience. The folding chair frame 1000 is applied to folding chairs, and folding chairs with the folding chair frame 1000 also have the same functions as described above, which will not be elaborated further here.

[0043] The folding chair in this embodiment includes a seat and a folding chair frame 1000. The seat is connected to the front support tube 300 and the rear support tube 400. For easy folding, the seat is made of an elastic or flexible material, allowing it to be bent and return to its original shape after unfolding. Alternatively, the seat can be made of a rigid material, in which case it is detachably connected to the front support tube 300 and the rear support tube 400. Before folding the chair, the seat must be removed.

[0044] Figure 1 This is a schematic diagram of the folding chair frame 1000 in the open state provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of the folded state of the folding chair frame 1000 provided in an embodiment of this utility model; Figure 3 This is a schematic diagram of the folding chair frame 1000 provided in the embodiment of this utility model in its folded state; Figure 4 This is a schematic diagram of the folding chair frame 1000 provided in an embodiment of the present invention in its opened state; Figure 5 This is a schematic diagram of the folded state of a portion of the folding chair frame 1000 provided in an embodiment of this utility model; Figure 6 This is a schematic diagram of the folded state of a portion of the folding chair frame 1000 provided in an embodiment of this utility model.

[0045] like Figure 1 , Figure 2 and Figure 3As shown, the folding chair frame 1000 in this embodiment includes a front leg tube 100, a rear leg tube 200, a front support tube 300, a rear support tube 400, a front connecting seat 500, a rear connecting seat 600, and an intermediate connector 700; one end of the intermediate connector 700 is connected to the front connecting seat 500, and the other end of the intermediate connector 700 is connected to the rear connecting seat 600; the front leg tube 100 is rotatably connected to the front connecting seat 500, the front support tube 300 is rotatably connected to the front leg tube 100, and the front support tube 300 can rotate toward or away from the front leg tube 100; the rear leg tube 200 is rotatably connected to the rear connecting seat 600, the rear support tube 400 is rotatably connected to the rear leg tube 200, and the rear support tube 400 can rotate toward or away from the rear leg tube 200. When the folding chair frame 1000 is folded down, the front leg tube 100 rotates relative to the front connecting seat 500 to move closer to it, and the rear leg tube 200 rotates relative to the rear connecting seat 600 to move closer to it. Furthermore, the front support tube 300 can rotate towards the front leg tube 100 to move closer to it; the rear support tube 400 can rotate towards the rear leg tube 200 to move closer to it. Through this design, when the folding chair frame 1000 is not in use, the front leg tube 100, rear leg tube 200, front support tube 300, and rear support tube 400 can be folded down as much as possible, reducing the overall volume of the folding chair frame 1000, thus facilitating packing or carrying and improving convenience.

[0046] In this embodiment, both the front connecting seat 500 and the rear connecting seat 600 are connected to the intermediate connecting member 700 via threaded fasteners such as bolts and screws. Of course, the front connecting seat 500 and the rear connecting seat 600 can also be connected to the intermediate connecting member 700 using other methods such as plug-in connection, snap-fit ​​connection, or welding. The front connecting seat 500, the rear connecting seat 600, and the intermediate connecting member 700 can be designed as a separate structure, connected together using detachable or fixed connections. Furthermore, the front connecting seat 500, the rear connecting seat 600, and the intermediate connecting member 700 can also be designed as a single integral structure, integrated into a complete modular structure, such as being made into a large plastic part.

[0047] To improve assembly efficiency and optimize force transmission paths, please refer to [link / reference]. Figures 1-3 and combined Figures 4-6In this embodiment, the folding chair frame 1000 further includes a front adapter 810, through which the front leg tube 100 is rotatably connected to the front connecting seat 500, and the front leg tube 100 can rotate toward or away from the connecting plane of the front connecting seat 500; and / or, the folding chair frame 1000 further includes a rear adapter 820, through which the rear leg tube 200 is rotatably connected to the rear connecting seat 600, and the rear leg tube 200 can rotate toward or away from the connecting plane of the rear connecting seat 600. This design allows the folding chair frame 1000 to be further folded, making the overall volume of the folding chair frame 1000 smaller after folding, reducing the space occupied, and thus facilitating packing or carrying. Both the front adapter 810 and the rear adapter 820 can be provided simultaneously, or only one of them can be provided; this is not limited here. In this embodiment, both the front adapter 810 and the rear adapter 820 are provided. Furthermore, as an independent functional module, the adapter allows for standardized connections between the front leg tube 100 and the rear leg tube 200 and the front connector 500 and the rear connector 600, respectively. This reduces the overall assembly tolerance requirements and facilitates the individual replacement of damaged components. The front adapter 810 and the rear adapter 820 can be connected to the front connector 500 and the rear connector 600, respectively, using threaded fasteners. Alternatively, the front adapter 810 can be welded to the front connector 500, and the rear adapter 820 can be welded to the rear connector 600. The specific connection method is not limited here and is determined based on actual needs and processing costs.

[0048] To further fold the chair frame 1000 and minimize its folded volume, the front adapter 810 in this embodiment can rotate horizontally about an axis perpendicular to the connecting plane of the front connecting seat 500; and / or, the rear adapter 820 can rotate horizontally about an axis perpendicular to the connecting plane of the rear connecting seat 600. That is, the front adapter 810 can rotate horizontally in a plane parallel to the connecting plane of the front connecting seat 500, and can also fold around the connecting plane of the front connecting seat 500 to allow the front leg tube 100 to rotate towards or away from the connecting plane of the front connecting seat 500. Similarly, the rear adapter 820 can also rotate horizontally in a plane parallel to the connecting plane of the rear connecting seat 600, and can also fold around the connecting plane of the rear connecting seat 600 to allow the front leg tube 100 to rotate towards or away from the connecting plane of the rear connecting seat 600.

[0049] For details, please continue reading Figures 1-3 and combined Figures 4-6In this embodiment, the front adapter 810 includes a first adapter 811 and a second adapter 812. The front leg tube 100 is rotatably connected to the front connecting seat 500 via the first adapter 811, and the front support tube 300 is rotatably connected to the front leg tube 100 via the second adapter 812. And / or, the rear adapter 820 includes a third adapter 821 and a fourth adapter 822. The rear leg tube 200 is rotatably connected to the rear connecting seat 600 via the third adapter 821, and the rear support tube 400 is rotatably connected to the rear leg tube 200 via the fourth adapter 822. By providing adapters, the stress-bearing area can be increased, the local stress at the hinge point can be reduced, and wear or breakage caused by stress concentration can be avoided. Furthermore, adding adapters can expand the movement dimension of the rotating hinge point and allow for adjustment of the connection position, compensating for installation errors or dynamic deformation.

[0050] In this embodiment, the first adapter 811 can rotate about an axis parallel to the connecting plane of the front connecting seat 500, so that the front support tube 300 and the front leg tube 100 rotate toward or away from the rear connecting seat 600; and / or, the first adapter 811 can rotate horizontally about an axis perpendicular to the connecting plane of the front connecting seat 500; or, the third adapter 821 can rotate about an axis parallel to the connecting plane of the rear connecting seat 600, so that the rear support tube 400 and the rear leg tube 200 rotate toward or away from the front connecting seat 500; and / or, the third adapter 821 can rotate horizontally about an axis perpendicular to the connecting plane of the rear connecting seat 600. The first adapter 811 can be designed to rotate horizontally in a plane parallel to the connecting plane of the front connecting seat 500, and also to fold around the connecting plane of the front connecting seat 500, so that the front leg tube 100 rotates toward or away from the connecting plane of the front connecting seat 500. Of course, the first adapter 811 and the third adapter 821 can also be designed as a single rotating plane, which is not limited here. With this design, the front support tube 300 and the front leg tube 100 can be folded and overlapped with the rear support tube 400 and the rear leg tube 200 to further close the folding chair frame 1000 and minimize the volume of the folding chair frame 1000 after folding.

[0051] To improve connection strength, in this embodiment, the front leg tube 100 is riveted to the first adapter 811, and the front support tube 300 is riveted to the second adapter 812; and / or, the rear leg tube 200 is riveted to the third adapter 821, and the rear support tube 400 is riveted to the fourth adapter 822. After plastic deformation, the rivets form a non-removable connection, avoiding the problem of threaded connections easily loosening under vibration (such as outdoor camping). The riveting force is evenly distributed on the connection surface, reducing local stress concentration compared to spot welding. Rivets are also particularly suitable for connecting tubes such as aluminum alloys and carbon fiber, which are not suitable for welding. Of course, the front leg tube 100 can be connected to the first adapter 811 using threaded fasteners such as screws, or it can be connected to the first adapter 811 using other methods such as snap-fit ​​connections, plug-in connections, or welding; these are not limited here. The rear leg tube 200 can also be connected to the third adapter 821 using screws or other threaded fasteners. The rear leg tube 200 can also be connected to the third adapter 821 using other methods such as snap-fit ​​connection, plug-in connection, welding, etc., which are not limited here.

[0052] Please see Figures 1-3 and combined Figures 4-6 To limit the rotation angle of the front support tube 300 and the rear support tube 400, a first limiting structure is provided on the second adapter 812 in this embodiment to limit the rotation angle of the front support tube 300; and / or, a second limiting structure is provided on the fourth adapter 822 to limit the rotation angle of the rear support tube 400. The first and second limiting structures can restrict the front support tube 300 and the rear support tube 400 from rotating and folding in one direction, only moving towards the front foot tube 100 and the rear foot tube 200. In this embodiment, the limiting structure is a limiting cover, which wraps around the second adapter 812 and the fourth adapter 822 on the side away from the front support tube 300 or the rear support tube 400.

[0053] Furthermore, the limiting structure can also restrict the rotation angle by setting up bosses, blocks, or grooves. For example, the adapter has a boss that can abut against the corresponding part on the support tube, preventing it from exceeding the maximum rotation angle. Alternatively, the limiting structure can also limit the rotation angle through limiting elements and holes. For instance, the support tube has a limiting hole, and the adapter has a corresponding limiting shaft, so the support tube is stopped by the hole wall when it rotates to its limit position. By setting up a limiting structure, the support tube can be prevented from rotating arbitrarily. Users do not need to judge the direction of rotation; they only need to apply force in one direction to complete the folding, simplifying the operation process. Moreover, setting a limiting structure to restrict the rotation angle can also prevent structural damage caused by excessive folding or reduce the risk of user injury.

[0054] Depending on the usage scenario, people have different requirements for the height of folding chairs. Please continue reading. Figures 1-3 and combined Figures 4-6In this embodiment, the folding chair frame 1000 further includes a front telescopic tube 910 and a rear telescopic tube 920. The front telescopic tube 910 is sleeved on the front support tube 300 and can extend and retract relative to the front support tube 300. The rear telescopic tube 920 is sleeved on the rear support tube 400 and can extend and retract relative to the rear support tube 400. By adjusting the length of the telescopic tube extending relative to the support tube, the height of the folding chair frame 1000 can be adjusted, thereby adjusting the height of the folding chair.

[0055] To prevent the telescopic tubes from shrinking unexpectedly and to improve safety, the front telescopic tube 910 and the rear telescopic tube 920 in this embodiment are respectively provided with locking mechanisms. The locking mechanisms are used to selectively fix the relative telescopic position of the front telescopic tube 910 and the front support tube 300 or to selectively fix the relative telescopic position of the rear telescopic tube 920 and the rear support tube 400.

[0056] To reduce the weight of the folding chair frame 1000, the folding chair frame 1000 in this embodiment is made of lightweight materials, such as aluminum alloy.

[0057] According to the folding chair frame 1000 provided in this embodiment, the working principle of the folding chair frame 1000 is as follows:

[0058] When the folding chair frame 1000 is folded down, the front support tube 300 first rotates toward the front leg tube 100 to move closer to the front leg tube 100; the rear support tube 400 rotates toward the rear leg tube 200 to move closer to the rear leg tube 200. Then, the front leg tube 100 rotates relative to the front connecting seat 500 to move closer to the front connecting seat 500, and the rear leg tube 200 can rotate relative to the rear connecting seat 600 to move closer to the rear connecting seat 600. The first adapter 811 rotates horizontally about an axis perpendicular to the connecting plane of the front connecting seat 500, and the third adapter 821 rotates horizontally about an axis perpendicular to the connecting plane of the rear connecting seat 600, so as to further bring the front and rear leg tubes and the front and rear support tubes together towards the position of the middle connecting seat; finally, the first adapter 811 or the third adapter 821 rotates about an axis parallel to the connecting plane of the front connecting seat 500 or the rear connecting seat 600, so as to make the front support tube 300 and the front leg tube 100 rotate toward the direction closer to or away from the rear connecting seat 600, or make the rear support tube 400 and the rear leg tube 200 rotate toward the direction closer to or away from the front connecting seat 500, so as to further fold them down and reduce the overall volume after folding.

[0059] In summary, the folding chair frame 1000 includes a front leg tube 100, a rear leg tube 200, a front support tube 300, a rear support tube 400, a front connecting seat 500, a rear connecting seat 600, and an intermediate connector 700; one end of the intermediate connector 700 is connected to the front connecting seat 500, and the other end of the intermediate connector 700 is connected to the rear connecting seat 600; the front leg tube 100 is rotatably connected to the front connecting seat 500, and the front support tube 300 is rotatably connected to the front leg tube 100, and the front support tube 300 can rotate towards or away from the front leg tube 100; the rear leg tube 200 is rotatably connected to the rear connecting seat 600, and the rear support tube 400 is rotatably connected to the rear leg tube 200, and the rear support tube 400 can rotate towards or away from the rear leg tube 200. Through the above design, when the folding chair frame 1000 is not in use, the front leg tube 100, rear leg tube 200, front support tube 300 and rear support tube 400 can be folded up as much as possible, reducing the overall volume of the folding chair frame 1000, thereby making it easier to pack or carry and improving convenience.

[0060] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A folding chair frame, characterized in that, include: Front leg tube (100), rear leg tube (200), front support tube (300), rear support tube (400), front connector (500), rear connector (600), and intermediate connector (700); One end of the intermediate connector (700) is connected to the front connector (500), and the other end of the intermediate connector (700) is connected to the rear connector (600); The front leg tube (100) is rotatably connected to the front connecting seat (500), the front support tube (300) is rotatably connected to the front leg tube (100), and the front support tube (300) can rotate toward or away from the front leg tube (100); the rear leg tube (200) is rotatably connected to the rear connecting seat (600), the rear support tube (400) is rotatably connected to the rear leg tube (200), and the rear support tube (400) can rotate toward or away from the rear leg tube (200).

2. The folding chair frame according to claim 1, characterized in that, The folding chair frame (1000) also includes a front adapter (810), the front leg tube (100) is rotatably connected to the front connecting seat (500) through the front adapter (810), and the front leg tube (100) can rotate toward the connecting plane of the front connecting seat (500) or away from it. And / or, the folding chair frame (1000) further includes a rear adapter (820), the rear leg tube (200) being rotatably connected to the rear connecting seat (600) via the rear adapter (820), the rear leg tube (200) being rotatable toward the connecting plane of the rear connecting seat (600) or away from it.

3. The folding chair frame according to claim 2, characterized in that, The front adapter (810) can rotate horizontally about an axis perpendicular to the connection plane of the front connector (500); And / or, the rear adapter (820) is rotatable horizontally about an axis perpendicular to the connection plane of the rear connector (600).

4. The folding chair frame according to claim 2 or 3, characterized in that, The front adapter (810) includes a first adapter (811) and a second adapter (812). The front leg tube (100) is rotatably connected to the front connecting seat (500) through the first adapter (811), and the front support tube (300) is rotatably connected to the front leg tube (100) through the second adapter (812). And / or, the rear adapter (820) includes a third adapter (821) and a fourth adapter (822), the rear leg tube (200) is rotatably connected to the rear connecting seat (600) through the third adapter (821), and the rear support tube (400) is rotatably connected to the rear leg tube (200) through the fourth adapter (822).

5. The folding chair frame according to claim 4, characterized in that, The first adapter (811) is rotatable about an axis parallel to the connecting plane of the front connector (500) so that the front support tube (300) and the front foot tube (100) rotate toward or away from the rear connector (600); and / or, the first adapter (811) is rotatable horizontally about an axis perpendicular to the connecting plane of the front connector (500). Alternatively, the third adapter (821) may rotate about an axis parallel to the connecting plane of the rear connector (600) so that the rear support tube (400) and the rear foot tube (200) rotate toward or away from the front connector (500); and / or, the third adapter (821) may rotate horizontally about an axis perpendicular to the connecting plane of the rear connector (600).

6. The folding chair frame according to claim 4, characterized in that, The front foot tube (100) is riveted to the first adapter (811), and the front support tube (300) is riveted to the second adapter (812); And / or, the rear foot tube (200) is riveted to the third adapter (821), and the rear support tube (400) is riveted to the fourth adapter (822).

7. The folding chair frame according to claim 4, characterized in that, The second adapter (812) is provided with a first limiting structure, which is used to limit the rotation angle of the front support tube (300); And / or, the fourth adapter (822) is provided with a second limiting structure, which is used to limit the rotation angle of the rear support tube (400).

8. The folding chair frame according to claim 1, characterized in that, The folding chair frame (1000) also includes a front telescopic tube (910) and a rear telescopic tube (920). The front telescopic tube (910) is sleeved on the front support tube (300) and can extend and retract relative to the front support tube (300). The rear telescopic tube (920) is sleeved on the rear support tube (400) and can extend and retract relative to the rear support tube (400).

9. The folding chair frame according to claim 8, characterized in that, The front telescopic tube (910) and the rear telescopic tube (920) are respectively provided with locking mechanisms. The locking mechanisms are used to selectively fix the relative telescopic position of the front telescopic tube (910) and the front support tube (300) or to selectively fix the relative telescopic position of the rear telescopic tube (920) and the rear support tube (400).

10. A folding chair, characterized in that, Includes a seat surface and a folding chair frame (1000) as described in any one of claims 1-9, wherein the seat surface is connected to the front support tube (300) and the rear support tube (400) respectively.

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