Rapid replacement device for seat backrest

Abstract

The invention provides a seat backrest quick replacement device which comprises at least two quick release structures arranged on the two sides of the joint of a backrest and a cushion, and each quick release structure comprises a first connecting part and a second connecting part which are connected with the cushion and the backrest respectively. The seat backrest can be quickly replaced by locking and unlocking the first connecting part and the second connecting part, the operation is simple, the efficiency is high, and the installation occupied space is small; the first connecting part comprises a pressing switch, an elastic connecting assembly, a first fixing piece and a first connecting assembly, the second connecting part comprises a second fixing piece and a second connecting assembly, the first connecting part and the cushion are connected into a whole through the first fixing piece, and the second connecting part and the backrest are connected into a whole through the second fixing piece; the pressing switch controls the elastic connecting set and the first connecting assembly to move relative to the first connecting part, so that the second connecting assembly and the first connecting assembly can be connected or separated, and the whole seat can be locked through mutual cooperation of all the parts.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile seats, and in particular relates to a quick replacement device for a seat back. Background Art

[0002] As the public's demand for vehicles increases, users' use of vehicles will no longer be limited to the function of transportation, but will be more reflected in the vehicle's intelligence, comfort, and driving space. For example, as time goes by, users may continue to make demands on vehicle seats, requiring modification and upgrading. In addition, they may need to be repaired or replaced after long-term use. For the existing seat structure, the seat cushion and backrest are a whole. When only the seat backrest needs to be replaced, the seat needs to be disassembled as a whole. Even if only a single component part needs to be replaced, the entire seat must be replaced to achieve the replacement of specific parts. The operation process will be more cumbersome and will also cause unnecessary scrapping of consumables, resulting in waste. If the vehicle seat can be modularized, only the modular backrest part needs to be modified or replaced when necessary, which is more convenient to operate and will not cause waste of resources. Summary of the invention

[0003] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a seat back quick replacement device, which can split the seat cushion and the backrest of the seat into two modules without changing the overall structure of the seat, so as to realize the rapid replacement of the seat back to meet the customized requirements and facilitate maintenance and updating, thus solving the problem of material loss caused by the overall replacement of the seat. At the same time, it will not affect the structure of the seat itself and the strength of daily use, and is convenient for the modification of the seat structure. It has a simple structure, low cost and strong versatility.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides a seat back quick replacement device, comprising at least two sets of quick release mechanisms, which are arranged on two sides of the seat opposite to each other, and the quick release mechanisms include:

[0005] The first connecting part comprises:

[0006] A push switch connected to the seat, wherein the push switch is a self-locking switch;

[0007] An elastic connection component, one end of which is connected to the seat through a first fixing member, and the other end of which is connected to the push switch, and the elastic connection component is compressed or released when the push switch is turned on or off;

[0008] A first connecting component is disposed on the elastic connecting component, and when the push switch is turned on or off, the elastic connecting component drives the first connecting component to move toward or away from the first fixing member;

[0009] A second connecting portion, comprising a second connecting component and a second fixing member, wherein one end of the second connecting component is connected to the seat through the second fixing member, and the other end cooperates with the structure of the first connecting component;

[0010] The first connecting part and the second connecting part are respectively connected to the opposite surfaces of the seat cushion and the backrest of the seat. When the push switch is turned off, the second connecting component can be connected and locked with the first connecting component, and the seat cushion and the backrest are fixed. When the push switch is turned on, the second connecting component can be unlocked and separated from the first connecting component, and the seat cushion and the backrest are disassembled.

[0011] In an optional embodiment of the present invention, the elastic connection component includes:

[0012] A linkage shaft, one end of which is connected to the push switch, and when the push switch is turned on or off, the linkage shaft moves in a direction close to or away from the first fixing member;

[0013] An elastic telescopic rod, arranged on both sides of the linkage shaft, one end of which is connected to the first fixing member, and the other end of which is connected to the first connecting component;

[0014] The first connecting component is connected to the linkage shaft and moves relative to the first fixing member together with the linkage shaft, and the elastic telescopic rod is telescoped along with the movement of the first connecting component.

[0015] In an optional embodiment of the present invention, a built-in groove is formed on the first fixing member, the linkage shaft matches the shape of the built-in groove, and the linkage shaft moves in the built-in groove when the push switch is turned on or off.

[0016] In an optional embodiment of the present invention, a first spring is arranged on the outside of the linkage shaft and the elastic telescopic rod, and the first spring is connected between the first fixing member and the first connecting component. When the first connecting component moves relative to the first fixing member, the first spring is compressed or released.

[0017] In an optional embodiment of the present invention, the elastic telescopic rod comprises:

[0018] An outer shell is connected to the first fixing member, and a cavity is formed in the outer shell;

[0019] A second spring is disposed in the cavity;

[0020] A movable part, one end of which is connected to the first connecting component and the other end of which is located in the cavity. When the first connecting component moves, it drives the movable part to move in the cavity. A connecting hole is provided at one end of the movable part away from the outer shell. The second spring is connected to the movable part through the connecting hole. When the movable part moves back and forth, the second spring is compressed or released.

[0021] In an optional embodiment of the present invention, the first connecting component includes:

[0022] A fixing plate, connected to the linkage shaft, and disposed between the first fixing member and the push switch;

[0023] A locking support member connected to one side of the fixing plate and arranged along the axial direction of the linkage shaft, wherein the locking support member matches the structure of the second connecting assembly;

[0024] When the push switch is turned on, the locking support is close to the first fixing member, and the second connecting component can be placed between the locking support and the push switch. When the push switch is turned off, the locking support is away from the first fixing member, cooperates with and locks with the second connecting component, and connects and fixes the first connecting part and the second connecting part.

[0025] In an optional embodiment of the present invention, a threaded hole is provided on the fixing plate, and a thread is correspondingly provided on the linkage shaft, and the linkage shaft passes through the threaded hole and is connected to the fixing plate.

[0026] In an optional embodiment of the present invention, the first connecting component further includes an auxiliary support member connected to the fixing plate, and when the second connecting component is cooperatively connected with the locking support member, the auxiliary support member is supported on the outer side of the second connecting component.

[0027] In an optional embodiment of the present invention, the second connecting component includes two symmetrically arranged insertion rods, the bottom of the insertion rods is provided with matching holes, the locking support member is a locking support rod, and the matching holes match the shape of the locking support rod.

[0028] In an optional embodiment of the present invention, the locking support rod is a quadrangular prism structure or a hexagonal prism structure.

[0029] The technical effect of the present invention is that the quick replacement of the seat back can be achieved by using the quick-release mechanisms on both sides. The unlocking and locking of the first connection part and the second connection part can be achieved by turning the switch on and off. The structure is simple, the operation is convenient and quick, and the seat back and the seat back can be quickly disassembled and installed, which reduces the workload of installing and disassembling the seat back. The connection structure has little impact on the original structural frame of the seat, and can be installed on a variety of seats for use. It has good compatibility and strong adaptability. The first connection part and the second connection part are respectively connected to the end of the seat cushion or the backrest. When installing, you only need to move the backrest up and down to place the insertion rod on one side of the locking support rod, and turn off the switch to lock it. When disassembling, you only need to turn on the switch to unlock it, which saves operating space. The positions of various components can be locked when the self-locking switch is turned on or off, which is convenient for Operation, through the compression and reset of the spring to provide power assistance to achieve the closing of the switch, the operation is smoother and faster, the linkage shaft and the elastic telescopic rod provide support while transmitting the movement, to ensure the stability and reliability of the overall connection, and an auxiliary support is also provided to balance the leaning force, improve stability and reduce component loss; the quick-release mechanism is detachably connected to the seat, which is convenient for local replacement as needed, and the internal components of the quick-release mechanism are detachably connected while ensuring strength, which is convenient for local replacement of components that are more easily worn, effectively reducing replacement costs; the present invention utilizes a quick-release mechanism to connect the seat cushion and the backrest together, which can meet the customized needs and local repair and replacement of vehicle seats without disassembling the entire seat, effectively reducing the repair and replacement costs of vehicle seats. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the structural disassembly of the quick release mechanism in one embodiment of the present invention;

[0032] Figure 2 It is a structural schematic diagram of an embodiment of the present invention when the second connection part is not connected to the first connection part in a switch-on state;

[0033] Figure 3 It is a structural schematic diagram of a second connection portion connected to a first connection portion in a switch-on state in an embodiment of the present invention;

[0034] Figure 4 It is a schematic diagram of the locking structure of the quick release mechanism in a switch-off state in one embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the connection structure between the first connection part and the seat cushion in one embodiment of the present invention;

[0036] Figure 6 It is a schematic diagram of the overall structure of the first connecting portion in a switch-on state in one embodiment of the present invention;

[0037] Figure 7 It is a schematic diagram of the overall structure of the first connecting portion in a switch-off state in one embodiment of the present invention;

[0038] Figure 8 It is a schematic diagram of the overall structure of a switch in one embodiment of the present invention;

[0039] Fig. 9 It is a schematic structural diagram of a limit sleeve of a switch in one embodiment of the present invention;

[0040] Fig.10 It is a schematic diagram of the structure of a pressing rod and a push rod of a switch in one embodiment of the present invention;

[0041] Fig.11 It is a structural schematic diagram of the connection between the push rod and the linkage shaft in one embodiment of the present invention;

[0042] Fig.12 It is a schematic diagram of the structure of the end portion of the linkage shaft in one embodiment of the present invention;

[0043] Fig.13 It is a schematic diagram of the structure of the linkage shaft and the push switch in the switch on and off states in one embodiment of the present invention;

[0044] Fig.14 It is a schematic structural diagram of an elastic telescopic rod in one embodiment of the present invention;

[0045] Fig.15 is a cross-sectional view of an elastic telescopic rod in one embodiment of the present invention;

[0046] Fig.16 It is a structural schematic diagram of a movable part of an elastic telescopic rod in one embodiment of the present invention;

[0047] Fig.17 It is a schematic structural diagram of the outer shell of the elastic telescopic rod in one embodiment of the present invention;

[0048] Fig.18 It is a schematic diagram of the motion state of the linkage shaft and the first spring during the switch-on process in one embodiment of the present invention;

[0049] Fig.19 It is a schematic diagram of the motion state of the elastic telescopic rod during the switch-on process in one embodiment of the present invention;

[0050] Fig. 20It is a schematic structural diagram of a first fixing member and a linkage shaft in one embodiment of the present invention;

[0051] Fig.21 This is a schematic structural diagram of a first connecting component in an embodiment of the present invention;

[0052] Fig. 22 It is a schematic diagram of the structure of the internal threads of the fixing plate in one embodiment of the present invention;

[0053] Fig.23 It is a schematic structural diagram of the external thread of the linkage shaft in one embodiment of the present invention;

[0054] Fig.24 It is a schematic diagram of the threaded connection structure between the fixing plate and the linkage shaft in one embodiment of the present invention;

[0055] Fig.25 It is a schematic diagram of the installation structure of the tenon structure in one embodiment of the present invention;

[0056] Fig.26 is a schematic structural diagram of a second connecting portion in an embodiment of the present invention;

[0057] Fig. 27 is a schematic structural diagram of a second fixing member in one embodiment of the present invention;

[0058] Fig.28 It is a structural schematic diagram of an insertion rod in one embodiment of the present invention;

[0059] Fig.29 It is a structural schematic diagram of an insertion rod in another embodiment of the present invention;

[0060] Fig.30 A schematic diagram of the force acting on the second connecting portion in one embodiment of the present invention;

[0061] Fig.31 It is a schematic diagram of the force of the auxiliary support angle in one embodiment of the present invention;

[0062] Fig.32 It is a schematic diagram of the forces when the locking support rod is a regular quadrangular prism structure in one embodiment of the present invention;

[0063] Fig.33 It is a force diagram when the locking support rod is a regular hexagonal prism structure in another embodiment of the present invention;

[0064] Fig.34 It is a schematic diagram of the internal structure of the locking support rod when it is a regular hexagonal prism in one embodiment of the present invention;

[0065] Fig.35 It is a schematic diagram of the overall structure of the auxiliary support member in one embodiment of the present invention;

[0066] Fig.36 The figure is a schematic diagram of the force acting on the connection between the second fixing member and the insertion rod in one embodiment of the present invention.

[0067] Description of labels:

[0068] 100, first connection part; 200, second connection part; 300, seat cushion;

[0069] 110, push switch; 111, push rod; 112, limit sleeve; 113, push rod; 114, switch spring; 115, switch box; 116, button; 1111, first matching piece; 1121, second matching piece; 1122, first guide groove; 1123, second guide groove; 1124, first inclined surface; 1125, second inclined surface; 1131, third matching piece; 1132, third inclined surface;

[0070] 120, elastic connection assembly; 121, linkage shaft; 122, elastic telescopic rod; 123, first spring; 1221, outer shell; 1222, second spring; 1223, movable part;

[0071] 130. A first fixing member; 140. A first connecting component;

[0072] 141, fixing plate; 142, locking support member; 143, auxiliary support member; 1411, threaded hole; 1431, auxiliary support rod; 1432, auxiliary support angle; 1433, slot; 1434, bayonet;

[0073] 210, second fixing member; 220, second connecting assembly; 221, plug rod. DETAILED DESCRIPTION

[0074] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0075] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic manner, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0076] When disassembling and installing the vehicle seat back, the traditional process requires the entire seat to be disassembled or installed. Not only is the installation and disassembly more troublesome, but when the seat back needs to be customized, such as replacing a seat back without massage function with a massage function, or replacing a seat back without heating and ventilation function with a heating and ventilation back, the entire seat needs to be replaced to achieve functional improvement. From the perspective of component replacement and scrapping, partial damage requires overall replacement, which increases replacement costs. Therefore, if the seat structure can be disassembled, different modules can be easily installed and disassembled, which can better meet the replacement and repair of local components, and modify the seat structure to meet customization needs.

[0077] See also Figures 1 to 5 The present invention provides a seat back quick replacement device, which includes at least two sets of quick-release mechanisms, which are relatively arranged on both sides of the seat and cooperate to achieve the connection, fixation and quick disassembly of the seat; the quick-release mechanism includes a first connecting part 100 and a second connecting part 200, and the first connecting part 100 and the second connecting part 200 are respectively connected to the opposite surfaces of the seat cushion 300 and the backrest. The seat cushion 300 and the backrest are installed and disassembled by locking and separating the first connecting part 100 and the second connecting part 200, so that the seat is disassembled into two upper and lower modules of the seat cushion 300 and the backrest. The first connecting part 100 and the second connecting part 200 can be used to achieve quick disassembly and installation of the two modules, and stable support can be achieved, thereby ensuring the stability and safety of the seat in daily use while simplifying the disassembly and assembly steps of the seat backrest, and having high work efficiency. The first connection part 100 and the second connection part 200 are connected to the end of the seat cushion 300 or the backrest, which has little interference with the original structural frame of the seat and can be applied to the connection of various seat structures. It has strong versatility and is easy to replace at any time. The replacement operation can be achieved by slightly moving the backrest up and down. It does not take up too much space and is very suitable for seat replacement in a small space environment.

[0078] It can be understood that the seat back can be quickly disassembled and installed by cooperating with the first connecting part 100 and the second connecting part 200, so that the seat back or the seat cushion 300 can be replaced or repaired separately according to actual needs, thereby reducing the workload of disassembling and installing the vehicle seat back and effectively reducing the maintenance cost; at the same time, the quick-release mechanism on each side is also convenient for individual replacement and repair as needed, which can avoid unnecessary scrapping of consumables and reduce costs; it is also possible to replace the partial structure of the seat according to user requirements, and conveniently realize the upgrading and transformation of the seat. For example, the upper part of the backrest can be replaced with a storage rack with a storage function according to the storage needs, the backrest part can be replaced with a fixed partition to form a relatively closed partition with the trunk, and the seat part can be replaced with a storage box or a car refrigerator and other components, so that the seat back can be partially disassembled, installed and customized without disassembling the entire seat.

[0079] See also Figures 1 to 5 In an optional embodiment of the present invention, the first connection part 100 is connected to the upper end surface of the seat cushion 300 and is respectively arranged on both sides of its end, and the corresponding second connection part 200 is connected to the bottom of the backrest. The first connection part 100 and the second connection part 200 cooperate to form a quick release mechanism. The seat cushion 300 and the backrest can be quickly installed and disassembled by using the quick release mechanism on both sides of the seat. The connection structure of the first connection part 100 and the second connection part 200 can also provide support for the backrest to ensure the stability and safety of the seat. It can be understood that the positions of the first connecting part 100 and the second connecting part 200 on the seat are not restricted. They are arranged at the connection between the seat and the backrest to achieve a stable connection between the two. For example, the first connecting part 100 can be arranged at the end of the backrest, and the second connecting part 200 can be arranged at one end of the seat cushion 300. Considering the convenience of installation and the stability of support, the first connecting part 100 is arranged on the fixed seat cushion 300 as a structural base, the operation of the switch is more convenient, and the fixation of the first connecting part 100 and the seat cushion 300 can achieve a more stable support for the connection structure thereon. The second connecting part 200 is arranged on the movable backrest as a matching latch. During installation, you only need to move the backrest in the up and down directions to align the matching parts and then use the switch to lock it. The installation occupies a small space, which is convenient for rapid replacement of the backrest in the car and has high disassembly and assembly efficiency. In addition, the position of the quick-release mechanism may be set differently depending on the seat structure so as to achieve a good fit with the seat. For example, for a seat with a backrest adjustment function, the quick-release mechanism needs to be installed to the upper end of the backrest angle adjuster to avoid conflict between structural parts.

[0080] It should be noted that when the quick-release mechanism is connected to the seat, the first connecting part 100 and the second connecting part 200 can be fixed to the corresponding positions of the seat frame by bolt connection. Therefore, it is only necessary to add connecting holes to the original frame of the seat and install the corresponding quick-release mechanism to modify the original seat structure without changing the seat structure, avoiding the need to re-mold the seat cushion 300 and the seat back, saving costs while increasing production speed, and having high versatility and being compatible with a variety of seat structures; the quick-release mechanism and the seat are detachably connected, which also facilitates unilateral replacement of the quick-release mechanism and reduces costs.

[0081] See also Figures 1 to 7 In an optional embodiment of the present invention, the first connecting portion 100 includes a push switch 110, an elastic connecting component 120, a first fixing member 130 and a first connecting component 140. The push switch 110 is a self-locking switch. When the switch is pressed, the switch is turned on and locked. When the switch is pressed again, the switch is turned off and locked. Therefore, the positions of the components are determined after the switch is turned on or off, which is convenient for single-person operation to achieve quick connection and disassembly, etc.; one end of the elastic connecting component 120 is connected to the seat through the first fixing member 130, and the other end is connected to the push switch 110. When the push switch 110 is turned on or off, the elastic connecting component 120 is compressed or released, and the elastic connecting component 120 is used to store energy and provide power to assist the push switch 110 to be turned on and off; the first connecting component 140 is arranged on the elastic connecting component 120, and the push switch When the push switch 110 is opened or closed, the elastic connecting component 120 is used to transmit the movement of the push switch 110 to the first connecting component 140, driving the first connecting component 140 to move toward or away from the first fixing member 130. At the same time, the elastic connecting component 120 is connected and supported between the first fixing member 130 and the first connecting component 140 to ensure the overall structural strength and installation stability. By utilizing the different positions of the first connecting component 140 when the push switch 110 is opened and closed, the second connecting part 200 and the first connecting part 100 can be quickly locked or unlocked, thereby conveniently completing the installation and disassembly of the backrest.

[0082] See also Figures 1 to 7In an optional embodiment of the present invention, the quick-release mechanisms on both sides of the seat can be arranged relatively to each other, that is, on the first connecting parts 100 on both sides of the seat cushion 300, the push switches 110 are all located on the outer side, and the first fixing parts 130 are located on the inner side. When the switch is turned on, the first connecting component 140 is driven to move toward the inner side of the seat cushion 300. When the opening operation of the first connecting part 100 is completed, the positions of the first connecting components 140 on both sides are fixed. At this time, there is enough space between the first connecting components 140 on both sides of the seat and the push switches 110 so that the second connecting parts 200 on both sides of the backrest can be inserted into the appropriate position. Then the switch is turned off, and the first connecting components 140 on both sides move outward and are connected with the structure of the second connecting part 200 to clamp it between the first connecting component 140 and the push switch 110. The connection structure on both sides can achieve more stable support and limit, and the quick-release mechanism is locked, thereby fixing the backrest and the seat cushion 300.

[0083] See also Figures 1 to 10 In an optional embodiment of the present invention, the push switch 110 is a self-locking switch. Each time the switch is pressed, the switch can be self-locked in a fixed position. When the switch is pressed for the first time, the switch will be turned on and can remain in the turned-on state. When the switch 110 is pressed again, the switch will be turned off and can remain in the turned-off state. Repeated pressing can continuously realize opening and closing. By turning the switch on or off, the relative movement of the first connecting component 140 is controlled and can be fixed at a determined position, thereby changing the structure of the first connecting part 100. After the push switch 110 is turned on or off, the overall structure of the first connecting part 100 can be maintained in a stable state, without the need for additional operation to assist in fixing the components, thereby reducing the difficulty of operation during the installation process, so as to achieve connection and separation with the second connecting part 200. Specifically, when opening, the switch is pressed and the elastic connection component 120 and the first connection component 140 are driven to move in a direction close to the first fixing component 130. After moving to the minimum distance, the switch is locked, and the positions of each component are determined. At this time, the quick release mechanism can be unlocked; when closing, the switch is pressed and the elastic connection component and the first connection component 140 are driven to move in a direction away from the first fixing component 130. After moving to the maximum distance, that is, returning to the position before opening, the switch is locked, and the positions of each component are determined. At this time, the quick release mechanism can be locked.

[0084] See also Figure 8 to Figure 5In an optional embodiment of the present invention, the push switch 110 includes a push rod 111, a limit sleeve 112, a push rod 113 and a switch spring 114, which are stored in a switch box 115 and cooperate to realize switching and locking. Specifically, one end of the push rod 111 extends out of the switch box 115 and is connected to a button 116 for easy pressing operation, and the other end is provided with a plurality of first matching pieces 1111 along the circumferential direction, and a second matching piece 1121 is provided inside the limit sleeve 112, and a plurality of first guide grooves 1122 and second guide grooves 1123 are provided at intervals along the circumferential direction, and a first inclined surface 1124 and a second inclined surface 1125 are respectively formed between the second guide groove 1123 and the first guide grooves 1122 on both sides thereof, and the first inclined surface 1124 and the second inclined surface 1125 are staggered at the end of the second matching piece 1121, and a third matching piece 1131 is provided on the push rod 113; the limit sleeve 112 is provided at the switch In the box body 115, the pressing rod 111 and the limiting sleeve 112 are slidably connected through the first matching piece 1111 and the first guide groove 1122 and the second guide groove 1123. The push rod 113 can slide and rotate relative to the limiting sleeve 112. The switch spring 114 is arranged at the end of the switch box body 115 away from the button 116 and is connected to the push rod 113. In order to facilitate the coordinated sliding between the components, a third inclined surface 1132 is also formed at one end of the third matching piece 1131, and forms a certain angle with the first inclined surface 1124 and the second inclined surface 1125. The sliding of the push rod 113 is achieved by utilizing the end of the third inclined surface 1132 to cooperate with the first inclined surface 1124 and the second inclined surface 1125.Specifically, when the third matching piece 1131 is located in the first guide groove 1122, supported by the force of the switch spring 114 at the bottom, the end where the third inclined surface 1132 is located abuts against the first matching piece 1111 in the first guide groove 1122, and the first matching piece 1111 is fixedly engaged with the end of the second matching piece 1121 in the limiting sleeve 112, and the positions of the components in the push switch 110 are fixed. When the button 116 is pressed, the pressing rod 111 is subjected to pressure from the end and is pressed down along the first guide groove 1122 under the action of pressure, pushing the push rod 113 to slide in the first guide groove 1122. In this process, the switch spring 114 is compressed. When the push rod 113 moves to the end of the first guide groove 1122, its lateral pressure disappears. At this time, the end of the third matching piece 1131 and the second matching piece 1121 are engaged and fixed. The push rod 113 contacts the first inclined surface 1124 at the end, and under the action of the spring below, it can slide along the first inclined surface 1124 to the outer end of the second guide groove 1123 and be stuck under the action of the side and end surfaces, and the switch is turned on. At this time, the switch spring 114 is in a compressed state; when the switch is in the on state, press the button 116 again, and the pressing rod 111 moves under the action of pressure. At this time, the first matching piece 1111 located in the second guide groove 1123 moves to the end of the second guide groove 1123 and contacts the third matching piece 1131, transmitting the pressure to the push rod 113, and the push rod 113 first slides downward along the side, and after breaking away from the bottom of the side, it slides along the second inclined surface 1125 under the action of the switch spring 114 and enters the first guide groove 1122, and returns to its original position, and the switch is closed.

[0085] See also Figures 1 to 10 In an optional embodiment of the present invention, the push switch 110 drives the movement of the linkage shaft 121 through the relative movement of the push rod 113, and then drives the movement of the first connection component 140, and the first connection component 140 is used to move in the space between the switch box 115 and the first fixing member 130 to achieve the locking and unlocking of the first connection part 100 and the second connection part 200. Since the push switch 110 controls the push rod 113 to move, it will also perform a relative rotation at a certain angle, and the movement of the linkage shaft 121 and the first connection component 140 is a translational movement, which needs to be fixed in the circumferential direction. Therefore, the push rod 113 and the linkage shaft 121 need to be able to achieve smooth rotation, so that when the push rod 113 moves, the first connection component 140 and the linkage shaft 121 will only move relative to the seat cushion 300 and will not rotate, thereby ensuring the structural stability of the first connection part 100 and the smooth switch operation.

[0086] See also Figure 11 to Figure 12In an optional embodiment of the present invention, the connecting end of the push rod 113 and the linkage shaft 121 is structurally modified, a connecting hole is opened in the end of the push rod 113, and a connecting head is arranged at the end of the linkage shaft 121. When the connecting head is arranged in the connecting hole, a plurality of rolling bodies are evenly arranged circumferentially between the two, that is, the connecting part between the connecting head and the push rod 113 is transformed into a bearing structure to ensure the stability of the overall connection. When the push rod 113 rotates, it rotates relative to the internal linkage shaft 121 so that the linkage shaft 121 can remain stable. The friction force is effectively reduced by the rolling body, thereby ensuring that the push rod 113 can rotate smoothly. This method has a high mold opening cost and has high requirements for the production and manufacturing of the linkage shaft 121 and the push rod 113. In other embodiments, the push rod 113 and the linkage shaft 121 can also be connected to the inner and outer rings of the bearing respectively, so that the relative rotation of the inner and outer rings can be used to fix the internal linkage shaft 121 when the external push rod 113 rotates. For example, a connecting chassis can be provided at the end of the push rod 113, which is fixed to the outer ring of the linear bearing by a threaded connection, and the other side of the bearing is embedded in the inner diameter of the bearing through the linkage shaft 121, or a fixer can be provided at a position close to the end of the push rod 113, which is fixed to the flange seat by a threaded connection, and the protrusion at the end of the push rod 113 can cooperate with the central groove of the flange seat, and the outer ring of the bearing is connected to the push rod 113 through the flange seat at the end, and the linkage shaft 121 is embedded in the inner ring of the bearing on the other side, so as to fix the push rod 113 to the outer ring of the bearing; the bearing structure at the connection is used to reduce friction, so that the external push rod 113 can rotate smoothly while keeping the linkage shaft 121 fixed. The bearing structure is used to directly or indirectly realize the rotational connection between the push rod 113 and the linkage shaft 121, and the friction is effectively reduced by the ball bearing, so that the relative rotation between the push rod 113 and the linkage shaft 121 is smoother and more stable. The bearing structure has a higher strength, but the bearing connection structure and installation process are more complicated, and the production requirements are higher, and the mold opening cost is also higher.

[0087] See also Figures 1 to 12In other optional embodiments of the present invention, a rotation structure may be provided at the connection between the push rod 113 and the linkage shaft 121 to realize the rotation connection between the two. Specifically, for example, a conical groove is provided inwardly from the center of one end of the push rod 113 close to the linkage shaft 121, and correspondingly, one end of the linkage shaft 121 is provided with a conical end portion, which can match the conical groove. When the push rod 113 moves and rotates relative to the seat, the conical end portion of the linkage shaft 121 can rotate relatively in the conical groove, thereby keeping the linkage shaft 121 and the first connecting component 140 and the seat cushion 300 from rotating relatively, and can move relatively under the action of the push rod 113. It can be understood that the rotation connection mode between the push rod 113 and the linkage shaft 121 is not limited. For example, a spherical groove may be provided in the push rod 113, and one end of the linkage shaft 121 connected thereto is correspondingly provided with a ball-and-socket structure, so that the relative rotation between the linkage shaft 121 and the push rod 113 can be realized. By directly connecting the push rod 113 and the linkage shaft 121, the structure is simpler, the mold cost is lower, and the operation during splicing and replacement is simpler. However, due to the large friction during rotation, the smoothness of the switching action is not good, and the linkage shaft 121 may be damaged. The strength of the connection structure is weak and the structural stability is poor, which makes it easy to fatigue the structure and there is a risk of displacement or even falling off.

[0088] See also Figures 1 to 7 In an optional embodiment of the present invention, the elastic connection component 120 includes a linkage shaft 121, an elastic telescopic rod 122 and a first spring 123. One end of the linkage shaft 121 is connected to the push switch 110. When the push switch 110 is turned on or off, the linkage shaft 121 moves in a direction close to or away from the first fixing member 130; the elastic telescopic rod 122 is arranged on both sides of the linkage shaft 121, one end of which is connected to the first fixing member 130, and the other end is connected to the first connection component 140; the first connection component 140 is connected to the linkage shaft 121 and moves relative to the first fixing member 130 together with the linkage shaft 121, and the elastic telescopic rod 122 is extended and retracted with the movement of the first connection component 140; the first spring 123 is arranged on the outer side of the linkage shaft 121 and the elastic telescopic rod 122, the first spring 123 is connected between the first fixing member 130 and the first connection component 140, and when the first connection component 140 moves relative to the first fixing member 130, the first spring 123 is compressed or released.

[0089] See also Figures 1 to 13 , Figure 18 to Figure 19In an optional embodiment of the present invention, the linkage shaft 121 is connected between the first fixing member 130 and the push switch 110, and moves relative to the first fixing member 130 under the action of the push switch 110, thereby driving the movement of the first connecting component 140. The linkage shaft 121 is, for example, a cylindrical shaft body, one end of which is connected to the push rod 113 of the switch, and the other end is slidably connected to the first fixing member 130. It can be understood that when the switch is turned on, the button 116 is mainly subjected to the pressing force F along the direction of the push rod 113. 按压 The linkage shaft 121 moves along the force direction of the push rod 113, and drives the first connecting assembly 140 thereon to move, and at the same time the elastic telescopic rod 122 is compressed. At this time, the button 116 of the press switch 110 and the force direction of the push rod 113 (i.e., F 按压 The direction of movement of the linkage shaft 121 and the first connecting assembly 140 and the telescopic direction of the elastic telescopic rod 122 are consistent; when the switch is closed, the button 116 is mainly subjected to the power F given to the push rod 113 when the elastic deformation is released. 弹 , the linkage shaft 121 also moves along the force direction of the push rod 113, and drives the first connecting assembly 140 thereon to move, and at the same time the elastic telescopic rod 122 is released, at this time, the button 116 of the press switch 110 and the force direction of the push rod 113 (i.e., F 弹 ), the moving direction of the linkage shaft 121 and the first connecting component 140 and the telescopic direction of the elastic telescopic rod 122 are consistent.

[0090] See also Figures 1 to 7 In an optional embodiment of the present invention, a first spring 123 is provided on the outer side of the linkage shaft 121 and the elastic telescopic rod 122, and the first spring 123 is connected between the first fixing member 130 and the first connecting component 140. When the switch is turned on, the first connecting component 140 moves relative to the first fixing member 130, and the first spring 123 is compressed. Therefore, when the switch is closed, the elastic release of the first spring 123 can provide more auxiliary elastic force to the fixing plate 141 and the press switch 110. Specifically, when the push switch 110 is turned on, the first connecting component 140 moves in a direction close to the first fixing member 130. During this process, the first spring 123 is compressed and stores elastic potential energy, so that when the switch is turned off, the elastic force of the first spring 123 can be released to provide power to assist the switch to be closed. Multiple groups of springs are used in parallel, with greater stiffness and capable of providing sufficient kinetic energy. On the one hand, they can cooperate with the switch spring 114 to smoothly close the push switch 110, drive the first connecting component 140 to move, thereby locking the second connecting part 200, making the operation more convenient. On the other hand, they can also provide auxiliary support during connection to ensure the stability of the overall connection.

[0091] See also Figures 1 to 7 , Figures 14 to 19In an optional embodiment of the present invention, the elastic telescopic rod 122 is mainly used to assist in fixing the spring linkage shaft 121 and to achieve external elastic force support, and it mainly includes an outer shell 1221, a second spring 1222 and a movable member 1223. The outer shell 1221 is connected to the first fixing member 130, and a cavity is formed in the outer shell 1221; the second spring 1222 is arranged in the cavity of the outer shell 1221, and is mainly used to assist in the movement of the movable member 1223 relative to the outer shell 1221 through the storage and release of elastic potential energy, thereby achieving the extension and retraction of the elastic telescopic rod 122; one end of the movable member 1223 is connected to the first connecting component 140, and the other end is located in the cavity. When the first connecting component 140 moves, it drives the movable member 1223 in the cavity. The movable part 1223 moves in the cavity, and a small hole is opened at one end of the movable part 1223 away from the outer shell 1221. The second spring 1222 passes through the small hole and is connected to the movable part 1223, so as to realize the movement of the movable part 1223 and prevent the structure from detaching during the movement; the first spring 123 is wrapped around the outside of the elastic telescopic rod 122 and is connected to the movable part 1223 through the small hole, thereby realizing the connection with the fixed plate 141. When the movable part 1223 moves back and forth, the first spring 123 and the second spring 1222 are compressed or released.

[0092] Specifically, after the switch is turned on, since one end of the outer shell 1221 is fixed to the first fixing member 130, when the movable member 1223 is pushed by the first connecting component 140, it will shrink into the internal cavity of the outer shell 1221. At this time, the second spring 1222 in the elastic telescopic rod 122 is in a compressed state of elastic force storage; when the switch is turned off, the second spring 1222 in the elastic telescopic rod 122 is in a state of elastic force release, so that the movable member 1223 at the end will extend to the maximum extendable position. Since the elastic telescopic rod 122 is located between the first fixing member 130 and the first connecting component 140, when the seat as a whole changes from an unlocked state (i.e., after the push switch 110 is turned on, the first connecting part 100 is separated from the second connecting part 200) to a locked state (i.e., after the push switch 110 is turned off, the first connecting part 100 is connected to the second connecting part 200), a force in the direction of the push switch 110 will be provided to assist the first connecting component 140 to firmly fix the second connecting part 200, and at the same time, elastic force can be provided to assist the push switch 110 in button reset and lock the second connecting part 200.

[0093] See also Figures 14 to 19In an optional embodiment of the present invention, one end of the movable part 1223 is a movable rod made of solid hard material, and the other end is provided with two hooks. The movable rod can enter the cavity of the outer shell 1221 and pop out of the cavity with the assistance of the second spring 1222. The hook structure is adapted to the opening size of the cavity, limiting the movable rod from moving in the cavity without leaving the cavity. The total length of the hook and the movable rod limits the maximum protruding size of the movable part 1223 and the maximum size that can be retracted into the cavity.

[0094] See also Figures 14 to 19 In an optional embodiment of the present invention, the outer shell 1221 is an integrally formed structure, and its interior includes a solid part and a cavity. The cavity is mainly used to store the second spring 1222 and the hook structure, and the solid part is mainly used to cooperate in limiting the maximum retraction depth of the hook when it is retracted. When the second spring 1222 is compressed, the cavity structure can accommodate the movable rod to enter it, and its maximum accommodation distance is determined by the length of the hook structure and the thickness formed after the second spring 1222 is compressed.

[0095] See also Figures 1 to 7 and Fig. 20 In an optional embodiment of the present invention, the first fixing member 130 is used to fix the first connecting part 100 as a whole to the backrest or the seat cushion 300. The first fixing member 130 can be set at the end of the seat cushion 300, installed on a surface close to the seat back, and connected to the frame of the seat cushion 300 as a whole. For example, a plurality of bolt connection holes can be opened on the first fixing member 130, and it is fixed to the seat cushion 300 by bolt connection. A hexagonal hole structure is formed on the surface of the first fixing member 130. After the bolt is inserted into the bolt connection hole, the hexagonal structure at its end matches the hexagonal hole and sinks into the hexagonal hole, and then the other end is locked by a nut, which reduces the occupied space and can avoid loose connection during long-term use, thereby ensuring the stability and firmness of the connection of the components. The backrest is installed by connecting the first connecting part 100 and the second connecting part 200 at the connection between the backrest and the seat cushion 300. This will not cause excessive interference with the seat's own skeleton structure, and can be adapted to a variety of seats with different structures through the adjuster position, with good compatibility. For example, for a seat with an angle adjustment function, the first fixing part 130 is fixed to the upper end of the angle adjuster to avoid affecting the normal function of the seat.

[0096] See also Fig. 20In an optional embodiment of the present invention, a built-in groove is further formed on the first fixing member 130, and the shape of the linkage shaft 121 matches the shape of the built-in groove. The end of the linkage shaft 121 away from the push switch 110 is slidably connected to the built-in groove. When the push switch 110 is turned on or off, the linkage shaft 121 reciprocates in the built-in groove. The built-in groove is, for example, a circular semi-through hole groove formed in the center of the first fixing member 130. The linkage shaft 121 can move in the built-in groove and is supported by the built-in groove to ensure the overall structural strength, and the durability and stability of the structure are better.

[0097] See also Figures 1 to 20 In an optional embodiment of the present invention, when the push switch 110 is turned on, the button 116 is pressed, driving the linkage shaft 121 and the first connecting assembly 140 to move relative to the first fixing member 130, the linkage shaft 121 enters the built-in groove and moves inside it, and the elastic telescopic rod 122 moves together under the force of the fixing plate 141, pushing the movable member 1223 into the cavity of the outer shell 1221. At this time, since one end of the first spring 123 and the second spring 1222 are fixed to the end of the first fixing member 130, and the other end is in the first The connecting component 140 is directly or indirectly driven to move in the direction close to the first fixing member 130, and the pressure provided by the first connecting component 140 and the first fixing member 130 compresses the spring to store elastic potential energy; when the push switch 110 is closed, the spring will release the stored elastic potential energy, thereby providing a power in the direction of the push switch 110, and the spring restores its deformation while enabling the first connecting component 140 and the linkage shaft 121 to be reset, and the movable part 1223 of the elastic telescopic rod 122 also pops out from the cavity.

[0098] See also Figures 1 to 7 , Figure 21 to Figure 24In an optional embodiment of the present invention, the first connecting assembly 140 includes a fixing plate 141 , a locking support member 142 and an auxiliary support member 143 . The fixing plate 141 is connected to the linkage shaft 121 and is arranged between the first fixing member 130 and the push switch 110; the locking support member 142 is connected to one side of the fixing plate 141 and is arranged along the axial direction of the linkage shaft 121. The locking support member 142 matches the structure of the second connecting component 220. When the push switch 110 is turned on, the locking support member 142 is close to the first fixing member 130, and the second connecting component 220 can be placed between the locking support member 142 and the push switch 110. When the push switch 110 is turned off, the locking support member 142 is away from the first fixing member 130, and is connected and locked with the second connecting component 220 to connect and fix the first connecting part 100 and the second connecting part 200; the auxiliary support member 143 is connected to the fixing plate 141. When the second connecting component 220 is connected with the locking support member 142, the auxiliary support member 143 is located on the outside of the second connecting component 220 to achieve auxiliary support. The first connecting component 140 moves between the first fixing member 130 and the switch box body 115 under the control of the pressing switch 110 and the linkage shaft 121. When the switch is turned on, it maintains the maximum distance from the switch box body 115, and the quick release mechanism is in an unlocked state. At this time, the second connecting part 200 can be taken out or connected with the locking support member 142; when the first connecting component 140 is located at the minimum distance position from the switch box body 115 and the second connecting part 200 is connected with the locking support member 142, the first connecting component 140 and the switch box body 115 on both sides are used to assist in limiting the second connecting part 200 so that it is completely fixed, and the quick release mechanism as a whole is in a locked state.

[0099] See also Figure 21 to Figure 24In an optional embodiment of the present invention, the fixing plate 141 is mainly used to fix the movable part 1223 of the linkage shaft 121 and the elastic telescopic rod 122, and transmit its movement to the locking support member 142 and the auxiliary support member 143, so as to realize the locking and unlocking operation of the quick release mechanism by utilizing their position changes. The fixing plate 141 is connected to the first fixing member 130 through the linkage shaft 121 and the elastic telescopic rod 122, and the linkage shaft 121 and the elastic telescopic rod 122 provide supporting force for the fixing plate 141 to ensure the stability of the structure. A threaded hole 1411 is provided on the fixing plate 141, and the threaded hole 1411 is located in the middle of the two locking supports 142, and is used to fix the linkage shaft 121. A corresponding thread is provided on the linkage shaft 121, and the linkage shaft 121 passes through the threaded hole 1411 to be connected with the fixing plate 141. On the shaft body of the linkage shaft 121, the top of the thread is designed as a capping design, so that the linkage shaft 121 and the fixing plate 141 can be firmly clamped; after the fixing plate 141 and the linkage shaft 121 are rotated and tightened, when the pressing switch 110 drives the linkage shaft 121 to move axially, the fixing plate 141 will move with the linkage shaft 121, and the locking support rod and the auxiliary support rod 1431 on the fixing plate 141 will also move therewith. Specifically, when the first connecting part 100 is installed at one end of the seat cushion 300, the moving direction of the linkage shaft 121 and the first connecting component 140 is along the width direction of the seat cushion 300. When the push switch 110 is turned on, it moves toward the inner side of the seat cushion 300. When the push switch 110 is turned off, it moves toward the outer side of the seat cushion 300.

[0100] See also Figures 1 to 7 and Fig.21 In an optional embodiment of the present invention, the locking support member 142 is, for example, a locking support rod, which is a multifaceted prism structure, and a matching hole is formed on the second connecting component 220, and the matching hole matches the shape of the locking support rod. When the locking support rod is matched with the matching hole on the second connecting part 200, it can achieve complete circumferential limitation, and the seat back is fixed and supported by the locking of the first connecting part 100 and the second connecting part 200. Specifically, since the first connecting part 100 is arranged on both sides of the seat cushion 300, when the switch is turned on or off, the locking support members 142 on both sides move relative to each other. When the switch is turned on, the locking support rod moves toward the inner side of the seat cushion 300, thereby leaving space at both ends of the seat cushion 300 for the second connecting part 200 to be inserted. When the switch is turned off, the locking support rod moves toward the outer side of the seat cushion 300, clamping the second connecting part 200. The connection structures on both sides cooperate to achieve complete axial limitation, and the backrest is firmly connected to the seat cushion 300.

[0101] See also Figures 1 to 7 and Fig.21In an optional embodiment of the present invention, the auxiliary support member 143 is used to realize auxiliary support for the seat back, which includes an auxiliary support rod 1431 and an auxiliary support angle 1432. The auxiliary support rod 1431 is a multi-faceted prism structure, which is arranged at one end of the fixed plate 141, and is arranged parallel to the locking support member 142 and spaced a certain distance apart, and is used to install the auxiliary support angle 1432. The auxiliary support angle 1432 is connected to one side of the auxiliary support rod 1431 and is located between the auxiliary support rod 1431 and the locking support member 142. After the seat back is connected, the auxiliary support angle 1432 abuts against the rear side of the second connecting portion 200, and can provide auxiliary support when in use. Specifically, when the second connecting part 200 is connected to the locking support 142, the seat back is fixed on the seat cushion 300. When a human body leans on the back, a backward leaning force is applied to the back. At this time, the auxiliary support angle 1432 abuts against the side of the second connecting part 200, providing a reverse force auxiliary support to maintain balance and prevent the connection between the locking support 142 and the second connecting part 200 from being damaged under the action of the leaning force, thereby improving the service life of the locking support 142 and the second connecting part 200 and ensuring the stability and safety of the seat after it is fixed.

[0102] See also Figures 1 to 7 and Fig.21 In an optional embodiment of the present invention, the auxiliary support angle 1432 is an irregular polyhedron structure that is symmetrical front to back, and the side close to the second connecting part 200 is an inclined surface. The auxiliary support angle 1432 abuts against the rear side surface of the second connecting part 200 through the edge to achieve auxiliary support. This structure is more convenient for the installation of the second connecting part 200, ensuring support while avoiding structural conflicts during installation. In addition, during use, even if the edges are worn, it can continue to provide support assistance, effectively extending the service life of the component.

[0103] See also Figures 1 to 7 In an optional embodiment of the present invention, the fixing plate 141 and the locking support 142, as well as the auxiliary support rod 1431 and the auxiliary support angle 1432 can be an integrally formed structure, or they can be spliced ​​together using a threaded structure or a tenon structure to form an integral component to ensure the integrity and stability of the structure.

[0104] See also Figures 1 to 7In an optional embodiment of the present invention, the fixing plate 141 and the locking support 142, as well as the auxiliary support rod 1431 and the auxiliary support angle 1432 are an integral structure formed in one piece. The overall force of the components formed in one piece can effectively avoid structural fatigue caused by collision, extrusion, shaking, etc. between the spliced ​​structures, and avoid structural detachment or damage caused by structural fatigue between the auxiliary support angle 1432 and the auxiliary support rod 1431. The one-piece structure has the lowest modeling cost, use cost and after-sales maintenance cost, which effectively reduces the cost.

[0105] See also Figures 1 to 7 and Fig.26 In another optional embodiment of the present invention, the fixing plate 141 and the locking support 142, as well as the auxiliary support rod 1431 and the auxiliary support angle 1432 can also be spliced ​​into a whole by a tenon structure, and the tenon structure in the mortise and tenon structure is used to form a structural lock between the auxiliary support angle 1432 and the auxiliary support rod 1431, so as to facilitate fixation. For example, a slot 1433 structure is provided on one side of the auxiliary support rod 1431, and a pin 1434 structure is provided on one side of the auxiliary support angle 1432. The pin 1434 is inserted into the slot 1433 to form a lock for fixation. It can be understood that the positions of the slot 1433 and the pin 1434 can be interchanged. For example, the pin 1434 is provided on the auxiliary support rod 1431, and the slot 1433 is provided on the auxiliary support angle 1432. Considering that the pin 1434 structure is more prone to fatigue damage during use, the slot 1433 structure is provided on one side of the auxiliary support rod 1431, which is more convenient for repeated use of the support rod.

[0106] See also Figures 1 to 7 In other embodiments, the fixing plate 141 and the locking support member 142, or the auxiliary support rod 1431 and the auxiliary support angle 1432 can be spliced ​​into a whole by, for example, a bolt structure. For example, a threaded hole 1411 is provided on the auxiliary support rod 1431, and an extended threaded structure is provided on the surface connected to the auxiliary support angle 1432. By rotating and screwing the auxiliary support angle 1432 into the threaded hole 1411 of the auxiliary support rod 1431, the two can be tightly combined and fixed, which is convenient for disassembly.

[0107] See also Figures 1 to 7In an optional embodiment of the present invention, when the first connection part 100 is connected to the upper end surface of the seat cushion 300, the second connection part 200 is fixed to the bottom surface of the backrest corresponding to the seat cushion 300, and the backrest can be installed and disassembled by moving it up and down, which occupies a small space and can be quickly disassembled and assembled in a limited space environment such as the interior of a vehicle. The second connection part 200 includes a second fixing member 210 and a second connection assembly 220. One end of the second connection assembly 220 is connected to the bottom surface of the seat back through the second fixing member 210, and the other end cooperates with the structure of the first connection assembly 140. The second connection part 200 is connected to the frame structure of the seat back itself through the second fixing member 210 as a whole. When the push switch 110 is turned off, the second connecting component 220 is connected and locked with the first connecting component 140, thereby achieving the fixation of the seat cushion 300 and the backrest. When the push switch 110 is turned on, the second connecting component 220 is unlocked and separated from the first connecting component 140, thereby achieving the disassembly of the seat cushion 300 and the backrest. The seat backrest can be quickly replaced by using the first connecting component 140 and the second connecting component 220. It can be understood that the positions of the second connecting part 200 and the first connecting part 100 on the seat are relative. For example, when the first connecting part 100 is fixed to the end of the seat cushion 300, the second connecting part 200 is fixed to the bottom of the backrest. After the switch of the first connecting part 100 is turned on, the second connecting part 200 at the bottom of the seat backrest is vertically inserted downward into the space between the push switch 110 and the first connecting component 140 and the matching parts are aligned, and then the switch is turned off. The seat cushion 300 and the backrest can be locked by using the quick release mechanism on both sides.

[0108] See also Figures 1 to 4 , Figure 26 to Figure 29 In an optional embodiment of the present invention, the second fixing member 210 is used to fix the second connecting component 220 to the bottom of the frame of the seat back to ensure the integrity and stability of the structure. The second fixing member 210 can be, for example, a rectangular plate-shaped structure, and a plurality of threaded connection holes are provided on its side to connect and fix with the backrest frame; the bottom of the second fixing member 210 is provided with two openings, which match the structure of the second connecting component 220 and are used to fix the second connecting component 220, and the second connecting part 200 and the structural frame of the seat back are fixed together to form an integral structure, which can improve the stability and safety of the backrest. When the seat is installed, the second connecting component 220 is placed close to the seat cushion 300 and in an appropriate position, and the quick release mechanism is locked as a whole using a switch.

[0109] See also Figure 26 to Figure 29In an optional embodiment of the present invention, the second connecting component 220 is used to realize the combination of the second connecting part 200 and the first connecting part 100, and includes two symmetrically arranged plug rods 221, which are vertically connected to the bottom of the second fixing member 210 and arranged along the installation direction, that is, parallel to the plane of the backrest. The second connecting part 200 is a plug-shaped structure as a whole, which can be inserted into the space between the first connecting component 140 and the push switch 110, and there will be no structural conflict. A matching hole is provided at the bottom of each plug rod 221, which is a through-hole structure that penetrates the plug rod 221 and matches the shape of the locking support rod. The relative positions of the two matching holes are consistent with the relative positions of the two locking support rods, so that the locking support rod can pass through the matching holes and match with them, so as to realize the mutual fixation of the seat cushion 300 and the backrest, and the installation is convenient. It can be understood that the positions of the locking support rod and the matching holes are relative. In other embodiments, for example, the locking support rod can also be provided on the second connecting component 220, and the matching hole is provided on the fixing member of the first connecting component 140 to match with it.

[0110] See also Figure 26 to Figure 29 In an optional embodiment of the present invention, similar to the connection method of each component in the first connecting part 100, the insertion rod 221 and the second fixing member 210 can be an integrally formed structure to ensure strength and structural stability, or connected by a tenon structure or a threaded structure to facilitate partial replacement. For example, when the tenon structure is connected, a groove structure can be set on the side of the opening of the second fixing member 210, and a push-type paddle lock is set at one end of the insertion rod 221. When the insertion rod 221 is inserted into the opening, the paddle lock rebounds and engages with the groove to achieve locking, so that the insertion rod 221 is fixed to the second fixing member 210.

[0111] See also Figures 1 to 4 , Figure 30 to Figure 31In an optional embodiment of the present invention, when the second connection part 200 is fixed, the auxiliary support member 143 located on the fixing plate 141 abuts against the outer side of the insertion rod 221 located at the rear side of the seat, playing the role of auxiliary support. When the human body leans on the seat back, the backrest will be subjected to a backward force F1 and a downward gravity G1, forming a combined force, namely, a leaning force F2, in the direction in which the two forces extend. In daily use, the insertion rod 221 may be worn out in the direction of force due to structural fatigue, and because the end of the insertion rod 221 is clamped with the locking support rod through the matching hole, when the backrest is subjected to the leaning force F2, the excessive torque can easily damage the connection between the locking support rod and the matching hole. Therefore, adding an auxiliary support member 143 in the opposite direction of F2 can give a force of the same magnitude and opposite direction as F2 to balance the leaning force F2, thereby balancing the torque of the connection between the insertion rod 221 and the locking support rod, ensuring the stability of the structure, avoiding damage to the connection, and extending the service life of the second connection part 200. Specifically, during use, the auxiliary support angle 1432 is subjected to a downward gravity force G 角 When the human body leans back, the leaning force F2 transmitted through the second connecting portion 200 is used to provide a supporting force F 支撑 The combined force is balanced to assist in supporting the second support portion and the backrest, thereby preventing the connection between the first connection portion 100 and the second connection portion 200 from being damaged by excessive torque, thereby extending the service life of the quick release mechanism.

[0112] See also Figures 1 to 4 , Figure 26 to Figure 34 In an optional embodiment of the present invention, the locking support rod is a quadrangular prism or a hexagonal prism structure, and correspondingly, the matching hole is a quadrangular hole or a hexagonal hole to match the structure of the locking support rod. In the locking structure, the hexagonal prism structure has better structural stability than other prism structures. For example, when the triangular prism and quadrangular prism structures are subjected to pressure, they are prone to deformation due to uneven structural force, which can easily cause excessive wear on the structural parts during use, thereby reducing the stability of the structural parts, causing the locking part to loosen or the locking to fail, etc. Compared with the triangular prism and hexagonal prism structures, the quadrangular prism structure can save costs while relatively well controlling the structural stability, so as to reduce the cost of consumables.

[0113] Specifically, see Figure 32 to Figure 34In a regular tetrahedral prism structure, when the locking support rod is subjected to a leaning force F2 directed obliquely downward, since the locking support rod's own weight G2 is relatively small, the combined force of the two basically acts on the corners of the regular tetrahedral prism structure, resulting in uneven force and easy wear. A regular hexagonal prism has higher stability. When the side of the structure is subjected to pressure, due to the particularity of its structure, it can better decompose the force and evenly distribute it to each side. The force borne by the side will be evenly dispersed to form a force-receiving inward area, and an inward collapse force will be generated on the side of the prism, so that the structure remains stable and is not easily deformed. When it is subjected to forces from all directions, it can maintain a state of balanced force dispersion through its structure, and the structure will not be destroyed due to excessive local pressure. When subjected to a leaning force F2 directed obliquely downward, since F2 acts on the side of the regular hexagonal prism structure, the combined force F generated by it and the locking support rod's own weight G2 will be 合 It also acts on the side of the structure, so that the reverse supporting force generated by it will also act on the side of the hexagonal prism. The structure can be used to decompose the force, which has better stability and is not easy to cause structural wear.

[0114] See also Figure 32 to Figure 35 In an optional embodiment of the present invention, in the auxiliary support member 143, since the auxiliary support rod 1431 and the auxiliary support angle 1432 are a composite structure, when the auxiliary support rod 1431 is a regular quadrangular prism or a regular hexagonal prism structure, the original center of gravity will be broken, so that under the action of the leaning force F2 and its own gravity G3, the resultant force and the reverse supporting force will be able to act on the side of the polyhedron, thereby evenly dispersing the pressure caused by the force, and making the structure tend to be stable when subjected to force.

[0115] See also Figures 1 to 4In an optional embodiment of the present invention, in the quick release mechanism, multiple connection methods can be used between the individual components, or the overall structure modeling can be processed in one piece. In different connection methods, the stress state of the connection is different, which will have different effects on the strength and service life of the quick release mechanism. For example, when the auxiliary support rod 1431 and the auxiliary support angle 1432 are connected by a threaded structure, when the leaning force F2 acts on the connection between the auxiliary support rod 1431 and the auxiliary support angle 1432, a reaction force will be generated in the opposite direction of the resultant force formed by the auxiliary support rod 1431 and the auxiliary support angle 1432. The reaction force acts on the surface of the connection and forms multiple reaction forces on the surface to offset the force transmitted from the connection. Obviously, the threaded connection will be significantly affected by the interaction force. Under long-term action, the threaded structure will suffer from metal fatigue, especially at the root position of the protruding part of the threaded structure, it will be subjected to more extrusion force, which will cause structural fatigue or damage to the structural parts at the stress point. In addition, due to the repeated leaning of the human body during use, the threads may become loose or fall off due to vibration and friction. Therefore, although the use of threaded connection can conveniently fix the structural parts, repeated shaking and squeezing may cause unstable connections between the structural parts, resulting in unnecessary structural damage. At the same time, the threaded structure will also have certain wear and tear during daily use, thereby reducing the friction of the threaded structure itself, causing structural damage or falling off, and thus reducing the durability of the structural parts.

[0116] See also Figures 1 to 4 and Fig.25 In another optional embodiment of the present invention, when the auxiliary support rod 1431 and the auxiliary support angle 1432 are connected by a tenon splicing method, the pin 1434 will be firmly locked in the slot 1433 after splicing to achieve fixation. However, during the entry of the pin 1434, one side of the pin 1434 is squeezed, causing structural fatigue of the tenon structure. After repeated plugging and unplugging, the structure may also break at a weak point. When subjected to strong external force, the connection point of the slot 1433 structure is at risk of exceeding the stress strength limit, thereby causing the risk of fracture and damage to the spliced ​​structural parts. In the tenon structure, a reaction force is generated in the opposite direction of the resultant force formed by the leaning force F2 and the gravity of the tenon structure. Since the connection is made by locking the latch and the groove, the reaction force will be relatively concentrated on the joint, especially the root of the pin 1434 and the edge of the groove of the slot 1433, making the tenon structure more susceptible to structural fatigue. Under the mutual squeezing of the structural parts, the connection strength is weakened as the structural stability decreases. Due to the gaps around the connection, there is also a risk of structural deformation, fracture and damage, and there is also the possibility of the structure loosening and falling off.

[0117] It is understandable that when the joints are subjected to uneven force or there is structural fatigue, the structural parts will fall off or be damaged. In one-piece molded parts, since the structure is a whole and there is no splicing gap, only the overall force needs to be considered, and fatigue damage to the joints will not occur. When the structural part as a whole is subjected to the leaning force F2, the force point is located at the center of gravity, and the reaction force will be dispersed in the structure. The overall force is uniform, which can ensure good overall strength and stability.

[0118] See also Figures 1 to 4 , Figure 26 to Figure 29 as well as Fig.36 In an optional embodiment of the present invention, the insertion rod 221 and the opening of the second fixing member 210 can also be connected by a tenon structure, and are spliced ​​together in a manner of specially shaped grooves and paddle snap-fitting. When the entire spliced ​​structure is subjected to an oblique downward leaning force F2, a reaction force F4 will be generated in the opposite direction of the resultant force formed with the gravity G5. The reaction force formed at the structural joint after being affected by the resultant force will also form a force concentration at the tenon structure of the splicing piece. Long-term squeezing of the tenon will cause the tenon structure to become loose and fatigued, and there is even a risk of breakage and falling off.

[0119] See also Figures 1 to 36 It should be noted that, from the perspective of repair and damage of structural parts, the splicing structure is convenient to connect, and during use, only the damaged parts need to be replaced, while the integrated structure requires the entire part to be replaced; from the perspective of modeling and processing, the splicing parts require a large number of structures with a high degree of refinement, while the one-piece molded structural parts only need to be modeled once, and the stability of the overall part is relatively high.

[0120] See also Figures 1 to 36 In an optional embodiment of the present invention, when the quick release mechanism is locked, the push switch 110 is opened, and the linkage shaft 121 moves toward the direction of the first fixing member 130 while driving the first connecting assembly 140 to move together. At this time, the second connecting part 200 can be unlocked and separated from the first connecting part 100, and there is no mutual contact and penetration between the matching hole of the insertion rod 221 and the locking support rod. Since the second connecting part 200 is fixed to the backrest, the backrest can be disassembled when the second connecting part 200 is separated from the first connecting part 100; when the quick release mechanism is in the unlocked state, a gap is formed between the locking support rod and the switch assembly. When the second connecting part 200 is in the correct position, that is, located in the hollow part between the locking support rod and the push switch 110, the switch can be turned off to drive the locking support rod to move in the direction of the push switch 110 through the linkage shaft 121, and then the two locking support rods pass through the matching hole of the insertion rod 221, thereby fixing the second connecting part 200 and realizing the installation of the backrest.

[0121] See also Figures 1 to 4When the button 116 is pressed and the switch is turned on, the push rod 113 in the switch box body 115 drives the linkage shaft 121 to move in the built-in groove of the first fixing member 130, and drives the fixing plate 141 and the movable member 1223 to move in the direction close to the first fixing member 130, and at the same time, the elastic telescopic rod 122 will enter a compressed state. During the opening process, the elastic telescopic rod 122 and the first spring 123 outside the linkage shaft 121, the second spring 1222 inside the elastic telescopic rod 122, and the switch spring 114 inside the push switch 110 will all be compressed and store elastic potential energy. After the opening action is completed, the positions of the components are locked under the action of the switch lock. At this time, the distance between the locking support member 142 and the first fixing member 130 is the smallest, that is, it is in the maximum retracted state, and the quick release mechanism is in the unlocked state as a whole. In the unlocked state, the seat back can be lifted up to separate it from the seat cushion 300, so as to achieve quick disassembly, or The second fixing part at one end of the seat back is placed in the area between the first fixing part and the switch box body 115, and its position is ensured to achieve a good plug-in fit with the locking support 142. Then, the button 116 is pressed to turn off the switch to lock the entire quick-release structure. When the switch is turned off, due to the special structure inside the self-locking switch, it can drive the linkage shaft 121 to move in the opposite direction to that when it is turned on, and drive the first connecting component 140 to move together. At this time, the springs in the compressed state will release the elastic force to assist in resetting and supporting. After the closing is completed, the second fixing part is completely fixed under the limit of both sides, and the quick-release mechanism is in a locked state as a whole. The auxiliary support 143 behind the plug rod 221 near the tail of the seat cushion 300 will abut against the plug rod 221 to increase the overall structural strength and ensure the durability of the second connecting component 220 and the structural stability and safety of the backrest after splicing.

[0122] In summary, the seat back quick-change device of the present invention adopts a miniaturized, lightweight, and modular design, and utilizes a quick-release mechanism to connect and disassemble the seat cushion 300 and the backrest. The seat backrest can be quickly replaced through the cooperation of the first connecting portion 100 and the second connecting portion 200, which is convenient for realizing the modification of the seat and reducing the cost of consumables. The overall structure is simple and lightweight. The first connecting portion 100 and the second connecting portion 200 are respectively connected to the opposite surfaces of the seat cushion 300 and the backrest, which has little impact on the frame structure of the seat itself, has strong versatility and low cost, and can effectively reduce the installation. The quick-release mechanism occupies little space; the self-locking switch is used to drive the movement of the first connecting component 140 to control the connection relationship between the first connecting component 140 and the second connecting component 220, so as to realize the unlocking and separation between the components, and the operation is more convenient and the work efficiency is high; multiple groups of springs assist in realizing the resetting of the components, which is more convenient to operate and can also support and enhance the structural strength. An auxiliary support member 143 is also provided on one side of the connection of the quick-release mechanism to balance the force on the backrest, ensure the overall structural strength and reduce the loss of the insertion rod 221 and the locking support member 142; the components are detachably connected to facilitate local replacement and reduce costs.

[0123] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

[0124] In the description herein, many specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of the specific details or with other devices, systems, components, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0125] References throughout this specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout this specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the invention described and illustrated herein may be possible in light of the teachings herein and are to be considered part of the spirit and scope of the invention.

[0126] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0127] In addition, unless otherwise explicitly indicated, any marking arrows in the drawings should be regarded as exemplary only and not limiting. In addition, unless otherwise indicated, the term "or" used herein is generally intended to mean "and / or". In the case where the term is not clear because it is anticipated that the ability to separate or combine is provided, the combination of components or steps will also be regarded as indicated.

[0128] As used in the description herein and throughout the claims that follow, "a", "an", and "the" include plural references unless otherwise indicated. Likewise, as used in the description herein and throughout the claims that follow, the meaning of "in" includes "in" and "on" unless otherwise indicated.

[0129] The above description of the illustrated embodiments of the present invention (including the contents described in the Abstract) is not intended to be an exhaustive list or to limit the present invention to the precise form disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention as will be recognized and appreciated by those skilled in the art. As noted, these modifications may be made to the present invention in accordance with the above description of the embodiments described in the present invention, and these modifications will be within the spirit and scope of the present invention.

[0130] Systems and methods have been generally described herein as details that aid in understanding the present invention. In addition, various specific details have been given to provide an overall understanding of embodiments of the present invention. However, those skilled in the relevant art will recognize that embodiments of the present invention may be practiced without one or more of the specific details, or may be practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of embodiments of the present invention.

[0131] Thus, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the foregoing disclosure, and it should be understood that in some cases, some features of the invention will be employed without the corresponding use of other features without departing from the scope and spirit of the proposed invention. Thus, many modifications may be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terms used in the claims below and / or the specific embodiments disclosed as the best mode contemplated for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Thus, the scope of the invention will be determined solely by the appended claims.

Claims

1. A seat back quick replacement device, characterized in that: It comprises at least two sets of quick release mechanisms, which are arranged on two sides of the seat opposite to each other, and the quick release mechanisms include: The first connecting part comprises: A push switch connected to the seat, wherein the push switch is a self-locking switch; An elastic connection component, one end of which is connected to the seat through a first fixing member, and the other end of which is connected to the push switch, and the elastic connection component is compressed or released when the push switch is turned on or off; A first connecting component is disposed on the elastic connecting component, and when the push switch is turned on or off, the elastic connecting component drives the first connecting component to move toward or away from the first fixing member; A second connecting portion, comprising a second connecting component and a second fixing member, wherein one end of the second connecting component is connected to the seat through the second fixing member, and the other end cooperates with the structure of the first connecting component; The first connecting part and the second connecting part are respectively connected to the opposite surfaces of the seat cushion and the backrest of the seat. When the push switch is turned off, the second connecting component can be connected and locked with the first connecting component, and the seat cushion and the backrest are fixed. When the push switch is turned on, the second connecting component can be unlocked and separated from the first connecting component, and the seat cushion and the backrest are disassembled.

2. The seat back quick change device according to claim 1, characterized in that: The elastic connection assembly comprises: A linkage shaft, one end of which is connected to the push switch, and when the push switch is turned on or off, the linkage shaft moves in a direction close to or away from the first fixing member; An elastic telescopic rod, arranged on both sides of the linkage shaft, one end of which is connected to the first fixing member, and the other end of which is connected to the first connecting component; The first connecting component is connected to the linkage shaft and moves relative to the first fixing member together with the linkage shaft, and the elastic telescopic rod is telescoped along with the movement of the first connecting component.

3. The seat back quick change device according to claim 2, characterized in that: The first fixing member is formed with a built-in groove, the linkage shaft matches the shape of the built-in groove, and the linkage shaft moves in the built-in groove when the push switch is turned on or off.

4. The seat back quick change device according to claim 2, characterized in that: A first spring is arranged outside the linkage shaft and the elastic telescopic rod. The first spring is connected between the first fixing member and the first connecting component. When the first connecting component moves relative to the first fixing member, the first spring is compressed or released.

5. The seat back quick change device according to claim 2, characterized in that: The elastic telescopic rod comprises: An outer shell is connected to the first fixing member, and a cavity is formed in the outer shell; A second spring is disposed in the cavity; A movable part, one end of which is connected to the first connecting component and the other end of which is located in the cavity. When the first connecting component moves, it drives the movable part to move in the cavity. A connecting hole is provided at one end of the movable part away from the outer shell. The second spring is connected to the movable part through the connecting hole. When the movable part moves back and forth, the second spring is compressed or released.

6. The seat back quick change device according to claim 2, characterized in that: The first connection component comprises: A fixing plate, connected to the linkage shaft, and disposed between the first fixing member and the push switch; A locking support member connected to one side of the fixing plate and arranged along the axial direction of the linkage shaft, wherein the locking support member matches the structure of the second connecting assembly; When the push switch is turned on, the locking support is close to the first fixing member, and the second connecting component can be placed between the locking support and the push switch. When the push switch is turned off, the locking support is away from the first fixing member, cooperates with and locks with the second connecting component, and connects and fixes the first connecting part and the second connecting part.

7. The seat back quick change device according to claim 6, characterized in that: The fixing plate is provided with a threaded hole, the linkage shaft is correspondingly provided with a thread, and the linkage shaft passes through the threaded hole and is connected to the fixing plate.

8. The seat back quick change device according to claim 6, characterized in that: The first connecting component also includes an auxiliary support member connected to the fixing plate. When the second connecting component is cooperatively connected with the locking support member, the auxiliary support member is supported on the outer side of the second connecting component.

9. The seat back quick change device according to claim 6, characterized in that: The second connecting component includes two symmetrically arranged insertion rods, the bottom of the insertion rods is provided with matching holes, the locking support member is a locking support rod, and the matching holes match the shape of the locking support rod.

10. The seat back quick change device according to claim 9, characterized in that: The locking support rod is a quadrangular prism structure or a hexagonal prism structure.

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