Zero-gravity folding chair frame and folding chair

Abstract

A zero-gravity folding chair frame, comprising leg tube assemblies (1), a leg rest assembly (2), seat frame tubes (3) and a backrest assembly (4). Each leg tube assembly (1) comprises a front leg tube (10) and a rear leg tube (11), and the front leg tube (10) is rotatably connected to the rear leg tube (11). The leg rest assembly (2) comprises side tubes (20), and the two side tubes (20) are arranged in parallel and spaced apart. One end of each seat frame tube (3) is rotatably connected to the corresponding rear leg tube (11), and the other end of the seat frame tube (3) is rotatably connected to the corresponding side tube (20). The backrest assembly (4) is connected to the seat frame tubes (3). Since only one end of each seat frame tube (3) of the folding chair frame is connected to the corresponding rear leg tube (11), when a user sits on the seat frame tubes (3) and rests his / her back on the backrest assembly (4), the seat frame tubes (3) can rotate around the joints with the rear leg tubes (11), and drive the leg rest assembly (2) and the backrest assembly (4) to rotate, so that the user sitting on the seat frame tubes (3) has zero-gravity experience. Also provided is a folding chair, comprising the zero-gravity folding chair frame.

Description

A zero-gravity folding chair frame and folding chair

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202520290002.2, filed on February 21, 2025, entitled “A Zero Gravity Folding Chair Frame and Folding Chair”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of chairs, and more specifically, to a zero-gravity folding chair frame and a folding chair. Background Technology

[0004] 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.

[0005] However, existing folding chairs cannot provide a "zero gravity" experience for those sitting in them.

[0006] Application content

[0007] This application provides a zero-gravity folding chair frame and a folding chair, which can achieve zero-gravity functionality while being foldable.

[0008] The embodiments of this application can be implemented as follows:

[0009] An embodiment of this application provides a zero-gravity folding chair frame, which includes:

[0010] The leg tube assembly includes a front leg tube and a rear leg tube, which are rotatably connected.

[0011] The foot support assembly includes two side tubes, which are arranged side by side and spaced apart.

[0012] The seat frame tube has one end rotatably connected to the rear leg tube, and the other end rotatably connected to the side tube.

[0013] Backrest assembly, which is connected to the seat frame tube.

[0014] Optionally, the foot support assembly is a foldable structure.

[0015] Optionally, the foot support assembly also includes a horizontal connecting tube, the two ends of which are connected to the two side tubes respectively; the horizontal connecting tube is foldable or telescopic.

[0016] Optionally, the foot rest assembly also includes a folding latch, which is provided on the horizontal connecting tube to allow the horizontal connecting tube to be folded or unfolded.

[0017] 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.

[0018] Optionally, the horizontal connecting pipe is a telescopic pipe, and its two ends are connected to the two side pipes respectively.

[0019] Optionally, the folding chair frame may also include a folding aid disposed between the two front leg tubes.

[0020] Optionally, the folding aid is a scissor tube assembly, with both ends of the scissor tube assembly connected to two front leg tubes respectively.

[0021] Optionally, the scissor lift assembly includes a first scissor lift, a second scissor lift, and two telescopic tubes;

[0022] 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.

[0023] Two telescopic tubes are inserted into the front leg tube and can move inside the front leg tube.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Optionally, the backrest assembly can be foldable or retractable.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] This application also provides a folding chair, including the aforementioned zero-gravity folding chair frame.

[0032] The beneficial effects of the embodiments of this application are as follows:

[0033] 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.

[0034] This application also provides a folding chair, including the zero-gravity folding chair frame, which has all the functions of a zero-gravity folding chair frame. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 is a schematic diagram of the zero-gravity folding chair frame provided in the embodiment of this application in an upright state after unfolding;

[0037] Figure 2 is a schematic diagram of the zero-gravity folding chair frame provided in the embodiment of this application, which is in a flat (zero-gravity) state after being unfolded.

[0038] Figure 3 is a structural schematic diagram of the zero-gravity folding chair frame provided in the embodiment of this application during the folding process;

[0039] Figure 4 is a front view of the zero-gravity folding chair frame provided in the embodiment of this application after folding.

[0040] Figure 5 is a side view of the zero-gravity folding chair frame provided in the embodiment of this application after folding.

[0041] Figure 6 is a schematic diagram of the backrest assembly provided in the embodiments of this application when unfolded;

[0042] Figure 7 is a schematic diagram of the backrest assembly folded in an embodiment of this application;

[0043] Figure 8 is a schematic diagram of the structure of the foot support assembly provided in the embodiment of this application when it is unfolded;

[0044] Figure 9 is a schematic diagram of the structure of the foot support assembly provided in the embodiment of this application when folded;

[0045] Figure 10 is a schematic diagram of the connection structure between the scissor tube assembly and the front leg tube provided in the embodiments of this application;

[0046] Figure 11 is a schematic diagram of the connection structure between the foot tube connecting pipe and the scissor tube assembly provided in the embodiments of this application.

[0047] 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. Embodiments of the present invention

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0050] 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.

[0051] In the description of this application, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. appear 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 that the product of this application is usually placed in, it is only for the convenience of describing this application and simplifying the description, and does 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 application.

[0052] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0053] 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.

[0054] Unless otherwise explicitly stated 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 application according to the specific circumstances.

[0055] 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.

[0056] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0057] 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.

[0058] In view of this, the zero-gravity folding chair frame and folding chair provided in the embodiments of this application can solve the above problems, and will be described in detail below.

[0059] 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.

[0060] In this embodiment of the folding chair frame, the seat frame tube 3 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 their feet on the footrest assembly 2 and their 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 causing 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.

[0061] 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, 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.

[0062] 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 leg tube 10 and the rear leg 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 leg tube 10 and the rear leg tube 11 will not touch the bottom wall of the U-shaped cavity when rotating, thereby realizing the free rotation of the front leg tube 10 and the rear leg tube 11; optionally, the ends of the front leg tube 10 and the rear leg tube 11 housed in the U-shaped cavity can also be set to be arc-shaped.

[0063] 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.

[0064] 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.

[0065] 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 utilize existing armrest 6 structures or be custom-designed.

[0066] 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.

[0067] Referring to Figures 6 and 7 and in conjunction with Figure 1, the backrest assembly 4 is located on the side near the rear leg tube 11, providing support for the user. The backrest assembly 4 is foldable or extendable for easy storage.

[0068] In this embodiment, the backrest assembly 4 includes two backrest tubes 40, two cross tubes 41, a cross brace tube 42, and a release lock 43. The middle parts of the two cross tubes 41 are connected 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 backrest tubes 40 on the corresponding sides. 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] Referring to Figures 8 and 9 and in conjunction with Figure 1, in addition to the two side tubes 20, the footrest assembly 2 also includes a horizontal connecting tube 21. When the user sits, their 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, thereby achieving a bundled folding.

[0074] 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.

[0075] 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.

[0076] Optionally, 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 the user can place their feet when sitting.

[0077] In the embodiments of this application, 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.

[0078] Optionally, the footrest assembly 2 also includes a footrest stop tube 23, an upper folding tube 24, and an upper locking buckle 25.

[0079] 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.

[0080] 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.

[0081] Alternatively, the foot support assembly 2 can also be other forms of folding structure; or, based on this embodiment, the horizontal connecting tube 21 can be a telescopic tube, thereby achieving extension and retraction.

[0082] To make folding the chair frame easier and more stable when unfolded, a folding aid is provided between the two front leg tubes 10.

[0083] Referring to Figure 10 and in conjunction with Figure 1, the folding aid is a scissor tube assembly 5. The scissor tube assembly 5 is connected to the two front leg tubes 10 and is located between the two front leg tubes 10. It is configured to stabilize the chair frame when it is unfolded and to provide a certain amount of auxiliary retraction force when the chair frame is folded, making folding easier.

[0084] In this embodiment, 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 the first scissor lift 50 and the second scissor lift 51. A pin is inserted into the pin holes of the first scissor lift 50 and the second scissor lift 51, allowing them 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 the first scissor lift 50 and the second scissor lift 51 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 the front leg tubes 10. 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.

[0085] 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.

[0086] Referring again to Figures 1 and 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, achieving folding.

[0087] Referring to Figure 11, the end of the first section of the foot tube connecting tube 13 can 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.

[0088] In this embodiment, 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 easy carrying and moving. Optionally, the hollow tubes need to withstand the weight of the user when sitting and avoid deformation during use; therefore, the hollow tubes can be made of high-strength and lightweight materials, such as aluminum alloys or polymer composite materials.

[0089] In the embodiments of this application, all rotational fit connections not specifically described can be achieved using pins / pin shafts.

[0090] The folding chair frame of this application embodiment not only achieves bundled folding but also has a zero-gravity function, enriching the user experience.

[0091] An embodiment of this application 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.

[0092] The folding chair can also have elastic fabric installed on the frame, which can be placed 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. Optionally, a soft pad can be placed on the elastic fabric to improve seating comfort.

[0093] 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.

[0094] 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.

[0095] The above description is merely a specific embodiment of this application, but the scope of protection of this application 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 application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims. Industrial applicability

[0096] In summary, this application provides a zero-gravity folding chair frame and a folding chair, which achieves bundled folding while also having a zero-gravity function, thus enriching the user experience.

Claims

1. A zero-gravity folding chair frame, characterized in that, include: The leg tube assembly (1) includes a front leg tube (10) and a rear leg tube (11), which are rotatably connected; The foot support assembly (2) includes two side tubes (20), which are arranged side by side and spaced apart. Seat frame tube (3), one end of which is rotatably connected to the rear foot tube (11), and the other end of which is rotatably connected to the side tube (20); Backrest assembly (4), which is connected to the seat frame tube (3).

2. The zero-gravity folding chair frame according to claim 1, characterized in that, The foot support assembly (2) is a foldable structure.

3. The zero-gravity folding chair frame according to claim 2, characterized in that, The foot support assembly (2) also includes a horizontal connecting tube (21), the two ends of which are respectively connected to the two side tubes (20); the horizontal connecting tube (21) can be folded or extended.

4. The zero-gravity folding chair frame according to claim 3, characterized in that, The foot rest assembly (2) also includes a folding latch (22), which is disposed on the horizontal connecting tube (21) so that the horizontal connecting tube (21) can be folded or unfolded.

5. The zero-gravity folding chair frame according to claim 4, characterized in that, The footrest assembly (2) further includes a footrest stop tube (23), an upper folding tube (24), and an upper lock (25). The upper lock (25) is disposed on the upper folding tube (24) so ​​that the upper folding tube (24) can be folded or unfolded. The two ends of the upper folding tube (24) are respectively rotatably connected to the two side tubes (20). The two ends of the footrest stop tube (23) are respectively connected to the upper lock (25) and the folding lock (22).

6. The zero-gravity folding chair frame according to claim 3, characterized in that, The horizontal connecting pipe (21) is a telescopic pipe, and its two ends are respectively connected to the two side pipes (20).

7. The zero-gravity folding chair frame according to claim 1, characterized in that, The folding chair frame also includes a folding auxiliary component, which is disposed between the two front leg tubes (10).

8. The zero-gravity folding chair frame according to claim 7, characterized in that, The folding aid is a scissor tube assembly (5), and the two ends of the scissor tube assembly (5) are respectively connected to the two front leg tubes (10).

9. The zero-gravity folding chair frame according to claim 8, characterized in that, The scissor lift assembly (5) includes a first scissor lift (50), a second scissor lift (51), and two telescopic pipes (52). The first scissor tube (50) and the second scissor tube (51) are rotatably connected. The upper ends of the first scissor tube (50) and the second scissor tube (51) are rotatably connected to the front foot tube (10) on the corresponding side, 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 front leg tube (10) and are able to move inside the front leg tube (10).

10. The zero-gravity folding chair frame according to claim 9, characterized in that, The foot tube assembly (1) also includes a foot tube connecting tube (13), which is rotatably connected to both the front foot tube (10) and the rear foot tube (11).

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

12. The zero-gravity folding chair frame according to any one of claims 1 to 11, characterized in that, The backrest assembly (4) is foldable or retractable.

13. The zero-gravity folding chair frame according to claim 12, characterized in that, The backrest assembly (4) includes two backrest tubes (40), two cross tubes (41), a cross brace tube (42), and a decompression lock (43). The two cross tubes (41) are rotatably connected, and the top and bottom ends of the two cross tubes (41) are rotatably connected to the backrest tubes (40) on the corresponding sides. The cross brace tube (42) is disposed between the two cross tubes (41) and is rotatably connected to the two cross tubes (41). The decompression lock (43) is disposed on the cross brace tube (42) and can make the cross brace tube (42) fold or extend.

14. The zero-gravity folding chair frame according to claim 13, characterized in that, The ends of the front leg tube (10) and the rear leg tube (11) are rotatably connected. A retainer (12) is also provided at the connection between the ends of the front leg tube (10) and the rear leg tube (11). The retainer (12) can rotate around the connection between the ends of the front leg tube (10) and the rear leg tube (11). A handrail (6) is installed on the retainer (12).

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

16. A folding chair, characterized in that, Including the zero-gravity folding chair frame as described in any one of claims 1 to 15.

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