Zero-gravity folding chair frame and folding chair

Abstract

The embodiment of the utility model provides a zero-gravity folding chair frame and a folding chair, and relates to the field of chairs. The zero-gravity folding chair frame comprises a foot tube assembly, a footrest assembly, a seat frame tube and a backrest assembly, the foot tube assembly comprises a front foot tube and a rear foot tube, and the front foot tube is rotatably connected with the rear foot tube; the footrest assembly comprises side pipes, and the two side pipes are arranged side by side in a spaced mode. One end of the seat frame pipe is rotatably connected to the rear leg pipe, the other end of the seat frame pipe is rotatably connected with the side pipe, and the backrest assembly is connected with the seat frame pipe. According to the folding chair frame, only one end of the seat frame pipe is connected to the rear leg pipe, when a user sits on the seat frame pipe and the back leans against the backrest assembly, the seat frame pipe can rotate around the joint of the seat frame pipe and the rear leg pipe, and meanwhile, the footrest assembly and the backrest assembly are driven to rotate, so that the user sitting on the seat frame pipe has zero-gravity experience. The embodiment of the utility model further provides a folding chair which comprises the zero-gravity folding chair frame.

Description

Technical Field

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

[0002] A folding chair is a type of chair that can be folded up. It has the advantages of being easy to store, taking up little storage space, and being easy to carry, so it is widely used in a variety of places.

[0003] However, existing folding chairs cannot provide a "zero gravity" experience for those sitting in them. Utility Model Content

[0004] This utility model provides a zero-gravity folding chair frame and a folding chair, which can achieve zero-gravity function while being foldable.

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

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

[0007] The leg tube assembly includes a front leg tube and a rear leg tube, which are rotatably connected.

[0008] The foot support assembly includes two side tubes, which are arranged side by side and spaced apart.

[0009] The seat frame tube has one end rotatably connected to the rear leg tube, and the other end rotatably connected to the side tube.

[0010] Backrest assembly, which is connected to the seat frame tube.

[0011] Optionally, the foot support assembly is a foldable structure.

[0012] Optionally, the foot support assembly also includes a horizontal connecting tube, with its two ends connected to two side tubes respectively; the horizontal connecting tube is foldable or retractable. Optionally, the foot support assembly also includes a folding latch, which is disposed on the horizontal connecting tube to allow the horizontal connecting tube to be folded or unfolded.

[0013] Optionally, the footrest assembly also includes a footrest stop tube, an upper folding tube, and an upper locking buckle. The upper locking buckle is disposed on the upper folding tube so that the upper folding tube can be folded or unfolded. The two ends of the upper folding tube are rotatably connected to two side tubes respectively. The two ends of the footrest stop tube are connected to the upper locking buckle and the folding locking buckle respectively.

[0014] Optionally, the horizontal connecting pipe is a telescopic pipe, and its two ends are connected to the two side pipes respectively.

[0015] Optionally, the folding chair frame may also include a folding aid disposed between the two front leg tubes.

[0016] Optionally, the folding aid is a scissor tube assembly, with both ends of the scissor tube assembly connected to two front leg tubes respectively.

[0017] Optionally, the scissor lift assembly includes a first scissor lift, a second scissor lift, and two telescopic tubes;

[0018] The first scissor tube and the second scissor tube are rotatably connected. The upper ends of the first scissor tube and the second scissor tube are rotatably connected to the front foot tubes on the corresponding sides, respectively. The lower ends of the first scissor tube and the second scissor tube are rotatably connected to two telescopic tubes, respectively.

[0019] Two telescopic tubes are inserted into the front leg tube and can move inside the front leg tube.

[0020] Optionally, the leg tube assembly also includes a leg tube connecting tube, which is rotatably connected to both the front leg tube and the rear leg tube.

[0021] Optionally, the scissor tube assembly includes a first scissor tube, a second scissor tube, and two telescopic tubes. The first scissor tube and the second scissor tube are rotatably connected. The lower ends of the first scissor tube and the second scissor tube are respectively rotatably connected to the two telescopic tubes. The two telescopic tubes are inserted into the front leg tube and can move inside the front leg tube.

[0022] The leg tube assembly also includes a leg tube connecting tube, one end of which is rotatably connected to the rear leg tube, and the other end of which extends beyond the front leg tube. The end of the leg tube connecting tube extending beyond the front leg tube is rotatably connected to either the first scissor tube or the second scissor tube.

[0023] Optionally, the backrest assembly can be foldable or retractable.

[0024] Optionally, the backrest assembly includes two backrest tubes, two cross tubes, a cross brace tube, and a decompression lock. The two cross tubes are rotatably connected, and the top and bottom ends of the two cross tubes are rotatably connected to the backrest tubes on the corresponding sides, respectively. The cross brace tube is disposed between the two cross tubes and is rotatably connected to the two cross tubes. The decompression lock is disposed on the cross brace tube and can fold or extend the cross brace tube.

[0025] Optionally, the ends of the front leg tube and the rear leg tube are rotatably connected, and a retainer is provided at the connection between the ends of the front leg tube and the rear leg tube. The retainer can rotate around the connection between the ends of the front leg tube and the rear leg tube, and a handrail is installed on the retainer.

[0026] Optionally, the front end of the armrest is connected to the side tube, and the rear end of the armrest is connected to the backrest tube.

[0027] This utility model also provides a folding chair, including the aforementioned zero-gravity folding chair frame.

[0028] The beneficial effects of this utility model embodiment:

[0029] This zero-gravity folding chair frame includes a leg tube assembly, a footrest assembly, a seat frame tube, and a backrest assembly. The leg tube assembly consists of a front leg tube and a rear leg tube, which are rotatably connected to each other, allowing the leg tube assembly to fold and unfold. The footrest assembly includes two side tubes, which are arranged side by side and spaced apart. One end of the seat frame tube is rotatably connected to the rear leg tube, and the other end of the seat frame tube is rotatably connected to the side tube. The backrest assembly is connected to the seat frame tube. The seat frame tube of this folding chair frame is connected to the rear leg tube at only one end, and to the side tube of the footrest assembly at the other end. When a user sits on the seat frame tube with their feet on the footrest assembly and their back against the backrest assembly, the seat frame tube can rotate around its connection to the rear leg tube, simultaneously rotating the footrest assembly and the backrest assembly, giving the user a zero-gravity experience.

[0030] This utility model embodiment also provides a folding chair, including the aforementioned zero-gravity folding chair frame, which has all the functions of a zero-gravity folding chair frame. Attached Figure Description

[0031] 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.

[0032] Figure 1 This is a schematic diagram of the zero-gravity folding chair frame in an upright state after being unfolded, as provided in an embodiment of this utility model.

[0033] Figure 2 This is a schematic diagram of the zero-gravity folding chair frame provided in an embodiment of the present invention, in a flat (zero-gravity) state after being unfolded.

[0034] Figure 3 This is a structural diagram illustrating the folding process of the zero-gravity folding chair frame provided in an embodiment of this utility model.

[0035] Figure 4 This is a front view of the zero-gravity folding chair frame after it has been folded in an embodiment of this utility model.

[0036] Figure 5 This is a side view of the zero-gravity folding chair frame after it has been folded, as provided in an embodiment of this utility model.

[0037] Figure 6 This is a schematic diagram of the backrest assembly when unfolded according to an embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the backrest assembly folded in an embodiment of the present invention.

[0039] Figure 8 This is a schematic diagram of the structure of the foot support assembly when unfolded in an embodiment of this utility model;

[0040] Figure 9 This is a schematic diagram of the folded structure of the foot support assembly provided in an embodiment of the present invention;

[0041] Figure 10 This is a schematic diagram of the connection structure between the scissor lift assembly and the front leg tube provided in an embodiment of this utility model;

[0042] Figure 11 This is a schematic diagram of the connection structure between the foot tube connecting pipe and the scissor tube assembly provided in an embodiment of this utility model.

[0043] Icons: 1-Leg tube assembly; 10-Front leg tube; 11-Rear leg tube; 12-Seat; 13-Leg tube connecting tube; 2-Foot rest assembly; 20-Side tube; 21-Horizontal connecting tube; 22-Folding lock; 23-Foot rest stop tube; 24-Upper folding tube; 25-Upper lock; 3-Seat frame tube; 4-Backrest assembly; 40-Backrest tube; 41-Cross tube; 42-Horizontal support tube; 43-Uncompressor lock; 44-Backrest horizontal folding tube; 5-Scissor lift tube assembly; 50-First scissor lift tube; 51-Second scissor lift tube; 52-Telescopic tube; 6-Armrest. Detailed Implementation

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0049] The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0050] Unless otherwise explicitly specified and limited, terms such as "setup" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] It should be noted that, for the sake of simplicity, the aforementioned method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, because according to this application, some steps can be performed in other orders or simultaneously. The steps in the methods of this application embodiments can be adjusted, combined, or deleted according to actual needs.

[0052] 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.

[0053] As the name suggests, a folding chair is a chair that can be folded up. It has the advantages of being easy to store, taking up little storage space, and being easy to carry. Therefore, it is widely used in a variety of places. However, existing folding chairs cannot allow people sitting in them to experience the "zero gravity" function.

[0054] In view of this, the zero-gravity folding chair frame and folding chair provided in the embodiments of this utility model can solve the above problems, and will be described in detail below.

[0055] Please refer to Figures 1 to 5 The zero-gravity folding chair frame includes: a leg tube assembly 1, a footrest assembly 2, a seat frame tube 3, and a backrest assembly 4. The leg tube assembly 1 includes a front leg tube 10 and a rear leg tube 11, which are rotatably connected. The footrest assembly 2 includes two side tubes 20, which are arranged side-by-side and spaced apart. One end of the seat frame tube 3 is rotatably connected to the rear leg tube 11, and the other end of the seat frame tube 3 is rotatably connected to the side tubes 20. The backrest assembly 4 is connected to the seat frame tube 3.

[0056] In this embodiment of the utility model, the seat frame tube 3 of the folding chair frame is connected to the rear leg tube 11 at one end and to the side tube 20 of the footrest assembly 2 at the other end. When the user sits on the seat frame tube 3 and places his / her feet on the footrest assembly 2 and his / her back rests on the backrest assembly 4, the seat frame tube 3 can rotate around the connection point with the rear leg tube 11, thereby driving the footrest assembly 2 and the backrest assembly 4 to rotate, so that the user sitting on the seat frame tube 3 has a zero-gravity experience.

[0057] It should be understood that the zero-gravity experience mentioned in this embodiment refers to the user feeling weightless while sitting in the chair, not the absence of gravity. In this embodiment of the invention, there is a pair of leg tube assemblies 1, which are arranged parallel to each other at intervals. The pair of leg tube assemblies 1 have the same shape and structure, that is, there are two front leg tubes 10 and two rear leg tubes 11. The front leg tubes 10 and the rear leg tubes 11 are rotatably connected, thereby realizing the folding and unfolding of the leg tube assemblies 1.

[0058] Specifically, each of the front leg tube 10 and the rear leg tube 11 has a through hole near its end. By inserting a pin into the through hole of the front leg tube 10 and the through hole of the rear leg tube 11, the front leg tube 10 and the rear leg tube 11 can be rotatably engaged. A retaining seat 12 is also provided at the end connection of the front leg tube 10 and the rear leg tube 11. The retaining seat 12 can be configured as a U-shaped structure with a U-shaped cavity. The ends of the front leg tube 10 and the rear leg tube 11 are accommodated in the U-shaped cavity of the retaining seat 12. The two ends of the pin pass through the two side walls of the U-shaped cavity of the retaining seat 12, so that the front leg tube 10, the rear leg tube 11 and the retaining seat 12 can all rotate around the pin. It is worth mentioning that the ends of the front tube 10 and the rear tube 11 housed in the U-shaped cavity are provided with sufficient distance from the bottom wall of the U-shaped cavity to ensure that the front tube 10 and the rear tube 11 will not touch the bottom wall of the U-shaped cavity when rotating, thereby realizing the free rotation of the front tube 10 and the rear tube 11; of course, the ends of the front tube 10 and the rear tube 11 housed in the U-shaped cavity can also be set to be arc-shaped.

[0059] The front leg tube 10 and the rear leg tube 11 are rotatably connected to the same pin. Since the front leg tube 10 and the rear leg tube 11 are misaligned and require frequent rotation, a spacer can be placed between them to prevent friction during rotation. The spacer is fitted onto the pin. The spacer prevents mutual wear between the front leg tube 10 and the rear leg tube 11 and also presses them against the side wall of the U-shaped cavity of the retainer 12, preventing them from sliding on the pin. In this embodiment, the spacer can be a rubber pad.

[0060] Optionally, an armrest 6 is also installed on the upper part of the dinette 12. The armrest 6 can be used by the user to rest their hands when sitting. Since the dinette 12 can rotate around the latch, the armrest 6 installed on the dinette 12 can also rotate with the dinette 12. When the user sits on the chair and places their hands on the armrest 6, the user's body can rotate the armrest 6, thereby enhancing the user's zero-gravity experience.

[0061] The armrest 6 is elongated, with its front end connected to the side tube 20 of the footrest assembly 2 and its rear end connected to the backrest assembly 4. The armrest 6 and the side tube 20 can also be rotatably connected, allowing them to rotate; the armrest 6 and the backrest assembly 4 are also rotatably connected. The specific shape of the armrest 6 is not limited in this embodiment; it can adopt existing armrest 6 structures or be designed independently.

[0062] It should be noted that there are also two armrests 6. The front ends of the two armrests 6 are connected to the corresponding side tubes 20, and the rear ends of the two armrests 6 are connected to the backrest assembly 4. The front end of the armrest 6 refers to the side that the user faces when sitting normally, and the rear end is located on the opposite side of the front end.

[0063] refer to Figure 6 , Figure 7 and combined Figure 1 The backrest assembly 4 is located on one side near the rear leg tube 11, and the backrest assembly 4 provides a backrest for the user. The backrest assembly 4 has a foldable or retractable function for easy storage.

[0064] In this embodiment of the invention, the backrest assembly 4 includes two backrest tubes 40, two cross tubes 41, a cross brace tube 42, and a release lock 43. The two cross tubes 41 are connected at the middle by a pin, and the two cross tubes 41 can rotate around the pin. The top and bottom ends of the two cross tubes 41 are respectively rotatably connected to the corresponding backrest tubes 40. The connection between the cross tubes 41 and the backrest tubes 40 can also be achieved by using a pin to achieve a rotatable connection.

[0065] A cross brace 42 is disposed between two intersecting tubes 41 and rotatably connected to the two intersecting tubes 41. A decompression lock 43 is disposed on the cross brace 42 and allows the cross brace 42 to be folded or extended. For example, one side of the decompression lock 43 has a U-shaped groove that runs through the edge, one end of each of the two cross braces 42 is hinged to the wall of the U-shaped groove, and the other end of each of the two cross braces 42 is rotatably connected to the corresponding intersecting tubes 41. When the chair frame needs to be unfolded, press down on the release latch 43 to change the two horizontal support tubes 42 hinged to the release latch 43 from a parallel state to a straight line. The two horizontal support tubes 42 rotate around the release latch 43 and simultaneously open the two cross tubes 41, increasing the distance between the two backrest tubes 40, thus achieving unfolding. When the chair frame needs to be folded, lift up the release latch 43 to change the two horizontal support tubes 42 from a straight line state back to a parallel state. The two horizontal support tubes 42 drive the two cross tubes 41 to move, thus achieving folding.

[0066] Optionally, the bottom end of the cross tube 41 can also be connected to the backrest tube 40 via the backrest horizontal folding tube 44. The two ends of the backrest horizontal folding tube 44 are rotatably connected to the cross tube 41 and the backrest tube 40 respectively, so that when the backrest assembly 4 is folded, the backrest assembly 4 can be folded to a smaller size and the distance between the two backrest tubes 40 can be closer, so that the overall chair frame occupies less space and achieves bundled folding for easy storage.

[0067] The two backrest tubes 40 are also rotatably connected to the armrests 6, and the backrest tubes 40 and armrests 6 can also rotate via pins. The bottom ends of the two backrest tubes 40 are rotatably connected to the corresponding seat frame tubes 3. The rear end of the seat frame tube 3 is rotatably connected to the footrest tube 11, for example, by a pin passing through the backrest tube 40, seat frame tube 3, and footrest tube 11 in sequence. The front end of the seat frame tube 3 is rotatably connected to the side tube 20 of the footrest assembly 2. When the bottom end of the side tube 20 of the footrest assembly 2 touches the ground, the seat frame tube 3 is in a stable sitting state, and the user cannot experience zero gravity while sitting on the seat frame tube 3. When the front end of the seat frame tube 3 is raised and rotated, it causes the footrest assembly 2 to lift off the ground, and the user can experience zero gravity.

[0068] Since the backrest tube 40 is connected to the armrest 6 and the seat frame tube 3, the seat frame tube 3 is connected to the side tube 20 of the footrest assembly 2, and the side tube 20 is connected to the armrest 6, the seat frame tube 3, the backrest assembly 4, and the footrest assembly 2 will not rotate backward continuously, so there is no need to worry about the user slipping off the backrest side and falling.

[0069] refer to Figure 8 , Figure 9 and combined Figure 1In addition to the two side tubes 20, the footrest assembly 2 also includes a horizontal connecting tube 21. When the user sits, his / her feet are placed on the horizontal connecting tube 21. The two ends of the horizontal connecting tube 21 are connected to the two side tubes 20 respectively. The horizontal connecting tube 21 can be folded or extended and retracted, thereby realizing a bundled folding.

[0070] The horizontal connecting tube 21 is provided with a folding lock 22. The two ends of the horizontal connecting tube 21 are rotatably connected to the two side tubes 20 respectively. The folding lock 22 is used to fold and unfold the horizontal connecting tube 21.

[0071] For example, there are two or more horizontal connecting tubes 21, with the middle of the two horizontal connecting tubes 21 being arranged to rotate and cross each other, and the two ends of the two horizontal connecting tubes 21 being slidably connected to the side tubes 20, thereby realizing the folding of the foot support assembly 2.

[0072] Of course, the footrest assembly 2 can be directly composed of two side tubes 20, with the lower ends of the two side tubes set in a bent shape so that users can place their feet when sitting.

[0073] In this embodiment of the utility model, the foot support component 2 is a bundled folding structure. In addition to the examples listed, it can also be other foldable structures, and there is no limitation on this.

[0074] Optionally, the footrest assembly 2 may also include a footrest stop tube 23, an upper folding tube 24, and an upper locking buckle 25.

[0075] Both ends of the upper folding tube 24 are rotatably connected to the two side tubes 20 respectively. The upper locking buckle 25 is set on the upper folding tube 24. The upper locking buckle 25 is similar in structure to the decompression locking buckle 43. One end of the two upper folding tubes 24 is rotatably connected to the upper locking buckle 25, and the other end is rotatably connected to the side tube 20. When the two upper folding tubes 24 are unfolded in a straight line, the foot rest assembly 2 unfolds. Similarly, the structure of the folding locking buckle 22 is also similar to that of the decompression locking buckle 43. One end of the two horizontal connecting tubes 21 is rotatably connected to the folding locking buckle 22, and the other end is rotatably connected to the end of the side tube 20.

[0076] The footrest stop tube 23 is located in the middle of the two side tubes 20. The two ends of the footrest stop tube 23 are connected to the upper locking buckle 25 and the folding locking buckle 22 respectively. The footrest stop tube 23 stabilizes the footrest assembly 2 and prevents the footrest assembly 2 from suddenly retracting when it is unfolded. When the footrest assembly 2 needs to be folded, the upper locking buckle 25 or the folding locking buckle 22 is pulled upwards and the footrest stop tube 23 moves upwards.

[0077] In other embodiments, the foot support assembly 2 may also be a folding structure of other forms; or, based on this embodiment, the horizontal connecting tube 21 may be a telescopic tube, thereby achieving extension and retraction.

[0078] To make folding the chair frame easier and more stable when unfolded, a folding aid is provided between the two front leg tubes 10.

[0079] refer to Figure 10 and combined Figure 1 The folding aid is a scissor tube assembly 5, which is connected to the two front leg tubes 10. The scissor tube assembly 5 is located between the two front leg tubes 10 and is used to stabilize the chair frame when it is unfolded. It also provides a certain amount of auxiliary retraction force when the chair frame is folded, making folding easier.

[0080] In this embodiment of the invention, the scissor lift assembly 5 includes a first scissor lift 50, a second scissor lift 51, and two telescopic tubes 52. Corresponding pin holes are provided in the middle portions of both the first scissor lift 50 and the second scissor lift 51. A pin is inserted into the pin holes of both tubes, allowing the first scissor lift 50 and the second scissor lift 51 to be rotatably connected. The upper ends of the first scissor lift 50 and the second scissor lift 51 are rotatably connected to the corresponding front leg tubes 10, and the lower ends of both tubes are rotatably connected to the two telescopic tubes 52. The two telescopic tubes 52 are inserted into the front leg tubes 10 and can move within them. When the chair frame needs to be folded, the upper ends of the first scissor tube 50 and the second scissor tube 51 rotate around the connection point of the front leg tube 10 on the corresponding side, the angle between the first scissor tube 50 and the second scissor tube 51 becomes smaller, and at the same time the telescopic tube 52 moves outward from the inside of the front leg tube 10; when the chair frame is unfolded, the telescopic tube 52 moves inward from the inside of the front leg tube 10.

[0081] It is understandable that the number of the first scissor tube 50 and the second scissor tube 51 is the same. The number of the first scissor tube 50 can be one, two or more.

[0082] Refer again Figure 1 and Figure 2 To improve the stability of the front leg tube 10 and the rear leg tube 11 after unfolding, a leg tube connecting tube 13 is provided between the front leg tube 10 and the rear leg tube 11. The leg tube connecting tube 13 includes two sections, with the first section and the second section rotatably connected. The end of the first section is rotatably connected to the front leg tube 10, and the end of the second section is rotatably connected to the rear leg tube 11. When the chair frame is unfolded, the second section of the leg tube connecting tube 13 is attached to the rear leg tube 11. When the chair frame needs to be folded, the first section of the leg tube connecting tube 13 pushes the second section of the leg tube connecting tube 13 to rotate 180°, thereby making the first section of the leg tube connecting tube 13 parallel to the front leg tube 10, thus achieving folding.

[0083] refer to Figure 11The end of the first section of the foot tube connecting tube 13 can also extend beyond the front foot tube 10, and the end of the first section of the foot tube connecting tube 13 extending beyond the front foot tube 10 can be rotatably connected to the first scissor tube 50 or the second scissor tube 51.

[0084] In this embodiment of the invention, the front leg tube 10, rear leg tube 11, side tube 20, horizontal connecting tube 21, footrest tube 23, upper folding tube 24, seat frame tube 3, backrest tube 40, cross tube 41, horizontal support tube 42, backrest horizontal folding tube 44, first scissor lift tube 50, second scissor lift tube 51, and telescopic tube 52 can all be hollow tubes to reduce the weight of the chair frame for easier carrying and moving. Of course, the hollow tubes need to withstand the weight of the user when sitting and leaning against the chair to prevent deformation during use; therefore, the hollow tubes can be made of high-strength and lightweight materials, such as aluminum alloys or polymer composite materials.

[0085] In this embodiment of the invention, all rotational fit connections not specifically described can be achieved using pins / shafts.

[0086] The folding chair frame of this utility model embodiment not only achieves bundled folding but also has a zero-gravity function, enriching the user experience.

[0087] An embodiment of this utility model also provides a folding chair, including the aforementioned zero-gravity folding chair frame, which has all the functions of the zero-gravity folding chair frame.

[0088] Folding chairs can also have elastic fabric installed on the frame, between the two seat frame tubes 3 and the two backrest tubes 40, to facilitate user comfort. For better heat dissipation and ventilation, the elastic fabric can also have mesh elements. Of course, a soft pad can also be placed on the elastic fabric to improve seating comfort.

[0089] The elastic fabric on the folding chair frame is detachably connected to the seat frame tube 3 and backrest tube 40, so that the folding chair frame can be easily stored and different elastic fabrics can be replaced.

[0090] Other functions that the folding chair can achieve will not be described in detail here. You can refer to the existing technology and apply the functions in the existing technology to the folding chair in this embodiment.

[0091] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations 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. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A zero-gravity folding chair frame, comprising: The utility model relates to a folding chair frame, which comprises: a foot tube assembly (1) comprising a front foot tube (10) and a rear foot tube (11) rotatably connected to each other; a footrest assembly (2) comprising two side tubes (20) arranged side by side and spaced apart; a seat frame tube (3) rotatably connected at one end to the rear foot tube (11) and rotatably connected at the other end to the side tubes (20); a backrest assembly (4) connected to the seat frame tube (3).

2. The zero-gravity folding chair frame of claim 1, wherein, The footrest assembly (2) is a foldable structure.

3. The zero-gravity folding chair frame of claim 2, wherein, The footrest assembly (2) further comprises a cross connecting tube (21) rotatably connected at both ends to the two side tubes (20), and the cross connecting tube (21) is foldable or telescopic.

4. The zero-gravity folding chair frame of claim 3, wherein, The footrest assembly (2) further comprises a folding lock (22) arranged on the cross connecting tube (21) to enable folding or unfolding of the cross connecting tube (21).

5. The zero-gravity folding chair frame of claim 4, wherein, The footrest assembly (2) further comprises a footrest blocking tube (23), an upper folding tube (24), and an upper lock (25) arranged on the upper folding tube (24) to enable folding or unfolding of the upper folding tube (24), and both ends of the upper folding tube (24) are rotatably connected to the two side tubes (20), and both ends of the footrest blocking tube (23) are connected to the upper lock (25) and the folding lock (22).

6. The zero-gravity folding chair frame of claim 3, wherein, The cross connecting tube (21) is a telescopic tube, and both ends of the cross connecting tube (21) are connected to the two side tubes (20).

7. The zero-gravity folding chair frame of claim 1, wherein, The folding chair frame further comprises a folding auxiliary member arranged between the two front foot tubes (10).

8. The zero-gravity folding chair frame of claim 7, wherein, The folding auxiliary member is a scissor tube assembly (5) rotatably connected at both ends to the two front foot tubes (10).

9. The zero-gravity folding chair frame of claim 8, wherein, The scissor tube assembly (5) comprises a first scissor tube (50), a second scissor tube (51), and two telescopic tubes (52). The first scissor tube (50) and the second scissor tube (51) are rotatably connected, and the upper ends of the first scissor tube (50) and the second scissor tube (51) are rotatably connected to the corresponding side of the front foot tube (10), and the lower ends of the first scissor tube (50) and the second scissor tube (51) are rotatably connected to the two telescopic tubes (52). The two telescopic tubes (52) are inserted into the inside of the front foot tube (10) and can move inside the front foot tube (10).

10. The zero-gravity folding chair frame of claim 9, wherein, The foot tube assembly (1) further comprises a foot tube connecting tube (13) rotatably connected to the front foot tube (10) and the rear foot tube (11).

11. The zero-gravity folding chair frame of claim 8, wherein, The scissor tube assembly (5) comprises a first scissor tube (50), a second scissor tube (51) and two telescopic tubes (52), the first scissor tube (50) and the second scissor tube (51) are rotatably connected, the lower ends of the first scissor tube (50) and the second scissor tube (51) are rotatably connected with the two telescopic tubes (52) respectively, the two telescopic tubes (52) are inserted into the inside of the front leg tube (10) and can move in the inside of the front leg tube (10); The leg tube assembly (1) further comprises a leg tube connecting tube (13), one end of the leg tube connecting tube (13) is rotatably connected with the rear leg tube (11), the other end of the leg tube connecting tube (13) extends out of the front leg tube (10), and the end of the leg tube connecting tube (13) extending out of the front leg tube (10) is rotatably connected with the first scissor tube (50) or the second scissor tube (51).

12. The zero-gravity folding chair frame of any one of claims 1 to 11, wherein, The backrest assembly (4) is foldable or telescopic.

13. The zero-gravity folding chair frame of claim 12, wherein, The backrest assembly (4) comprises two backrest tubes (40), two cross tubes (41), a crossbar tube (42) and a decompression lock (43), the two cross tubes (41) are rotatably connected, the top ends and bottom ends of the two cross tubes (41) are rotatably connected with the corresponding side backrest tubes (40) respectively, the crossbar tube (42) is arranged between the two cross tubes (41) and rotatably connected with the two cross tubes (41), and the decompression lock (43) is arranged on the crossbar tube (42) and can make the crossbar tube (42) foldable or telescopic.

14. The zero-gravity folding chair frame of claim 13, wherein, The ends of the front leg tube (10) and the rear leg tube (11) are rotatably connected, the end connection of the front leg tube (10) and the rear leg tube (11) is further provided with a clamping seat (12), the clamping seat (12) can rotate around the end connection of the front leg tube (10) and the rear leg tube (11), and an armrest (6) is installed on the clamping seat (12).

15. The zero-gravity folding chair frame of claim 14, wherein, The front end of the armrest (6) is connected with the side tube (20), and the rear end of the armrest (6) is connected with the backrest tube (40).

16. A folding chair, characterized by The zero-gravity folding chair frame comprises the zero-gravity folding chair frame of any one of claims 1 to 15.

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