Seat back frame and vehicle

Abstract

The utility model discloses a seat backrest framework and vehicle, the seat backrest framework adopts thermoplastic composite material to make, the seat backrest framework includes at least two backrest areas, and at least part of two adjacent backrest areas is spaced, and at least one in two adjacent backrest areas is equipped with the backrest tooth portion that protrudes to another. According to the seat backrest framework of the utility model, can guarantee the comfort of riding while reducing the thickness and weight of seat whole, realize the light and thin of seat, thereby can increase the rear row space, reduce the occupied space of seat on the vehicle, and manufacturing efficiency is high, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of vehicle manufacturing technology, and in particular to a seat back frame and a vehicle having the seat back frame. Background Technology

[0002] In existing technologies, the seat back frame is a single piece of board with a large surface design and high rigidity. It needs to be covered with thick sponge and other elastic components to ensure seating comfort. The entire seat is thick, heavy, and costly in the front-to-back direction of the vehicle. Even if the entire seat is made of carbon fiber, it cannot achieve the ideal weight reduction effect. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a seat back frame that can reduce the overall thickness and weight of the seat while ensuring seating comfort, thereby achieving a thinner and lighter seat, which can increase rear seat space, reduce the space occupied by the seat in the vehicle, and has high manufacturing efficiency and low cost.

[0004] According to an embodiment of the present utility model, the seat back frame is made of thermoplastic composite material, the seat back frame includes at least two back areas, at least partially spaced apart from adjacent two back areas, and at least one of the adjacent two back areas is provided with a back tooth protruding toward the other.

[0005] According to the embodiment of the present utility model, by using thermoplastic composite materials to make the seat back frame, the load-bearing capacity and impact resistance of the seat back frame can be effectively improved, the weight of the seat back frame can be reduced, the seat back frame can be made lightweight, the manufacturing efficiency can be improved and the cost can be reduced. By setting the seat back frame to include at least two back areas, at least partially spaced between two adjacent back areas, and at least one of the two adjacent back areas is provided with a back tooth protruding towards the other, the overall thickness and weight of the seat can be reduced while ensuring the comfort of the ride, thus achieving the thinness of the seat, thereby increasing the rear space and reducing the space occupied by the seat in the vehicle.

[0006] According to some embodiments of the present invention, the seat back frame has two backrest areas, namely a first backrest area and a second backrest area; wherein the first backrest area and the second backrest area are distributed laterally spaced apart, and / or the first backrest area is provided with a first backrest tooth and the second backrest area is provided with a second backrest tooth.

[0007] According to some embodiments of the present invention, the seat back frame further includes a connector for connecting and fixing the first back tooth portion and / or the second back tooth portion.

[0008] According to some embodiments of the present invention, a seat back frame is formed between a first back area and a second back area. The first back teeth are multiple and are distributed sequentially along the length direction of the seat gap. The second back teeth are multiple and are distributed sequentially along the length direction of the seat gap. The connector is used to connect at least one first back tooth to at least one second back tooth.

[0009] According to some embodiments of the present invention, a seat back frame in which a plurality of first backrest teeth and a plurality of second backrest teeth are distributed in a one-to-one correspondence in the lateral direction, and the connecting member is constructed as a connecting rope; wherein, the connecting rope connects the plurality of first backrest teeth and the plurality of second backrest teeth in a staggered manner; or, the connecting rope includes a main rope body and a plurality of sub-rope bodies, wherein the plurality of sub-rope bodies, the plurality of first backrest teeth and the plurality of second backrest teeth correspond one-to-one, and each sub-rope body connects one first backrest tooth to a corresponding second backrest tooth, and the main rope body connects the plurality of sub-rope bodies.

[0010] According to some embodiments of the present invention, the seat back frame further includes a main pre-tensioning adjustment member, which is movably installed on the seat back frame. The main pre-tensioning adjustment member is connected to the connecting rope and selectively pre-tensions a plurality of first backrest teeth and a plurality of second backrest teeth through the connecting rope; and / or, the tooth length of the first backrest teeth or the second backrest teeth is L and the gap in the tooth direction is S, satisfying 400mm≥2L+S≥200mm, and L≥50mm.

[0011] According to some embodiments of the present invention, a seat back frame has a plurality of first backrest teeth and a plurality of second backrest teeth arranged vertically in an alternating pattern. The connecting member is constructed as a connecting rope, which includes a first connecting rope and a second connecting rope. Each first backrest tooth and a second backrest area are connected by a first connecting rope, and / or each second backrest tooth and a first backrest area are connected by a second connecting rope.

[0012] According to some embodiments of the present invention, the seat back frame includes a first backrest area with a first pre-tensioning adjustment member corresponding to each of the second backrest teeth. The first pre-tensioning adjustment member is connected to the first connecting rope and is used to selectively pre-tension the second backrest teeth. Alternatively, the second backrest area includes a second pre-tensioning adjustment member corresponding to each of the first backrest teeth. The second pre-tensioning adjustment member is connected to the second connecting rope and is used to selectively pre-tension the first backrest teeth. Or, the tooth length of the first or second backrest teeth is L and the tooth gap in the tooth direction is S, satisfying 400mm ≥ L + S ≥ 200mm.

[0013] According to some embodiments of the present invention, the seat back frame includes a rear frame and a bottom frame, the bottom frame is connected to the bottom of the rear frame, and the backrest area is located on the rear frame.

[0014] This utility model also proposes a vehicle.

[0015] The vehicle according to the present invention includes the seat back frame described in any of the above embodiments.

[0016] The vehicle and the aforementioned seat back frame have the same advantages over the prior art, which will not be repeated here.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural schematic diagram of the seat back frame according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the front structure of the seat back frame according to an embodiment of the present utility model. Figure 1 ; Figure 3 This is a schematic diagram of the front structure of the seat back frame according to an embodiment of the present utility model. Figure 2 ; Figure 4 This is a schematic diagram of the back structure of the seat back frame according to an embodiment of the present utility model. Figure 1 ; Figure 5 This is a schematic diagram of the back structure of the seat back frame according to an embodiment of the present utility model. Figure 2 .

[0019] Figure label: Seat back frame 100, rear side frame 101, bottom frame 102. Backrest area 1, first backrest area 11, first backrest tooth 111, second backrest area 12, second backrest tooth 121. 2. Backrest teeth, 3. Seat gaps Connecting rope 4, main rope body 41, sub-rope body 42, first connecting rope 43, second connecting rope 44. Main pretension adjustment component 51, first pretension adjustment component 52, second pretension adjustment component 53, and fastener 6. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The following is for reference. Figures 1-5The present invention describes a seat back frame 100 according to an embodiment of the present invention. The seat back frame 100 can reduce the overall thickness and weight of the seat while ensuring seating comfort, thereby achieving a thinner and lighter seat, which can increase rear seat space, reduce the space occupied by the seat in the vehicle, and has high manufacturing efficiency and low cost.

[0023] like Figures 1-5 As shown, according to one embodiment of the present invention, the seat back frame 100 is made of thermoplastic composite material. Thermoplastic composite material is an advanced material made by combining thermoplastic polymers (such as polyethylene PE, polyamide PA, polyphenylene sulfide PPS, polyether ether ketone PEEK, etc.) as the matrix with reinforcing materials (such as glass fiber, carbon fiber, aramid fiber) through a specific process. Thermoplastic composite material is manufactured by reversible physical changes (heating and melting, cooling and solidifying) of the matrix resin. No chemical reaction occurs in the process, and the material is recyclable and remodelable. Thermoplastic composites, characterized by low density, high strength and modulus, and good impact resistance, can withstand high external stresses. Therefore, by manufacturing the seat back frame 100 from thermoplastic composites, the load-bearing capacity and impact resistance of the seat back frame 100 can be effectively improved, while reducing its weight and achieving lightweight design. Thermoplastic composites also possess excellent environmental resistance, such as chemical corrosion resistance and good heat resistance, thereby extending the service life of the seat back frame 100. Furthermore, thermoplastic composites offer high design freedom, diverse molding processes, and short production cycles. The high production efficiency allows for the use of various processes such as compression molding, injection molding, extrusion molding, pultrusion molding, and filament winding to meet structural requirements of different shapes and sizes. This improves the manufacturing efficiency of the seat back frame 100, facilitates its rapid prototyping, and the thermoplastic composite material is recyclable and weldable, meaning it can be repeatedly processed and recycled. Two thermoplastic composite material components can also be welded together by heating and melting without the use of adhesives or mechanical connectors, thereby reducing the manufacturing cost of the seat back frame 100 and facilitating its connection with other structural components.

[0024] Therefore, by using thermoplastic composite materials to make the seat back frame 100, the load-bearing capacity and impact resistance of the seat back frame 100 can be effectively improved, the weight of the seat back frame 100 can be reduced, and the seat back frame 100 can be made lightweight. Compared with using thermosetting composite materials to make the seat back frame 100, the manufacturing efficiency is improved and the cost is reduced.

[0025] For example, in actual design, the reinforcing material used in manufacturing the seat back frame 100 can preferably be carbon fiber material. Carbon fiber material has excellent specific modulus and specific strength, which gives it extremely high rigidity and a certain degree of toughness, thus ensuring the high rigidity and toughness of the seat back frame 100.

[0026] Furthermore, the seat back frame 100 includes at least two back areas 1, with at least a portion of adjacent back areas 1 spaced apart, and at least one of the adjacent back areas 1 is provided with a back tooth 2 protruding toward the other.

[0027] Specifically, the seat back frame 100 may include two, three, or more backrest areas 1. Each backrest area 1 bears the weight of the passenger's back, supporting the upper body and improving passenger comfort. At least two backrest areas 1 may be distributed along the left-right, up-down, or other directions of the seat back frame 100, offering flexibility. Adjacent backrest areas 1 are at least partially spaced apart, meaning that a portion or all of adjacent backrest areas 1 may be spaced apart, either along the left-right, up-down, or other directions of the seat back frame 100. (See attached diagram.) Figure 1 As shown, at least a portion of two adjacent backrest areas 1 are spaced apart along the left-right direction of the seat backrest frame 100, that is, the lateral direction of the vehicle. By separating at least a portion of two adjacent backrest areas 1, a certain gap can be made between at least a portion of two adjacent backrest areas 1, thereby reducing the weight of the seat backrest frame 100.

[0028] At least one of two adjacent backrest areas 1 is provided with a backrest tooth 2 protruding towards the other, that is, one of the two adjacent backrest areas 1 can be provided with a backrest tooth 2 protruding towards the other, or both adjacent backrest areas 1 can be provided with backrest teeth 2 protruding towards each other, that is, the backrest tooth 2 can be set as a cantilever beam structure. When the seat back frame 100 is made of high-rigidity carbon fiber material, the backrest tooth 2 will have good elasticity and can rebound after being subjected to an impact load of a certain speed. In this way, when the passenger leans against the seat, the seat back frame 100 is subjected to a certain load. The backrest teeth 2 can slow down the speed at which the human body leans back by deforming. At the same time, due to the high rigidity of the carbon fiber material, the backrest teeth 2 can maintain a certain range of deformation to support the passenger, so that the passenger can feel the comfort of foam materials such as sponge. This allows the thickness of foam materials such as sponge to be eliminated or reduced, thereby reducing the overall thickness and weight of the seat, making the seat thinner and lighter without affecting the riding comfort. Furthermore, since the overall thickness of the seat in the front-to-back direction of the vehicle is reduced, the rear space can be increased, and the space occupied by the seat in the vehicle can be reduced.

[0029] It should be noted that the shape of the backrest teeth 2 is not specifically limited. For example, in actual design, the shape of the backrest teeth 2 can be designed as conical teeth, flat teeth, elliptical teeth, parabolic teeth, etc., which can be flexibly selected and set according to actual needs, and is not limited to the one described in this embodiment.

[0030] According to the embodiment of the present utility model, the seat back frame 100 is made of thermoplastic composite material, which can effectively improve the load-bearing capacity and impact resistance of the seat back frame 100, reduce the weight of the seat back frame 100, achieve lightweighting of the seat back frame 100, improve manufacturing efficiency and reduce costs; by setting the seat back frame 100 to include at least two backrest areas 1, at least partially spaced apart from adjacent two backrest areas 1, and at least one of the adjacent two backrest areas 1 is provided with a backrest tooth 2 protruding towards the other, the overall thickness and weight of the seat can be reduced while ensuring seating comfort, achieving a thinner and lighter seat, thereby increasing rear seat space and reducing the space occupied by the seat in the vehicle.

[0031] In some embodiments, the backrest area 1 is two, namely a first backrest area 11 and a second backrest area 12.

[0032] Specifically, when there are two backrest areas 1, the two backrest areas 1 are the first backrest area 11 and the second backrest area 12, respectively. The first backrest area 11 and the second backrest area 12 can be distributed separately along the height direction of the seat backrest frame 100, that is, along the vertical direction of the vehicle, or the first backrest area 11 and the second backrest area 12 can be distributed separately along the width direction of the seat backrest frame 100, that is, along the horizontal direction of the vehicle, or the first backrest area 11 and the second backrest area 12 can be distributed separately along other directions. The options are flexible. Both the first backrest area 11 and the second backrest area 12 can bear the weight of the passenger's back.

[0033] Furthermore, the first backrest region 11 and the second backrest region 12 are distributed laterally, and / or the first backrest region 11 is provided with a first backrest tooth 111 and the second backrest region 12 is provided with a second backrest tooth 121.

[0034] In other words, the first backrest area 11 and the second backrest area 12 are distributed at a certain distance along the lateral direction, that is, along the width direction of the seat backrest frame 100, that is, along the left and right direction of the vehicle. That is, there is a certain gap between the first backrest area 11 and the second backrest area 12 to reserve space for the setting of the backrest teeth 2 and its bending deformation. The first backrest teeth 111 can be set in the first backrest area 11, and the second backrest teeth 121 can be set in the second backrest area 12. The shapes of the first backrest teeth 111 and the second backrest teeth 121 can be the same or different. The first backrest teeth 111 and the second backrest teeth 121 can also be distributed relatively or alternately.

[0035] By incorporating the first backrest teeth 111 and the second backrest teeth 121, both the first backrest area 11 and the second backrest area 12 can deform to support the weight of the human body and slow down the speed at which the body leans back. This prevents uneven force distribution on one side of the seat back frame 100, thus improving the user experience. Furthermore, the first backrest teeth 111 and the second backrest teeth 121 on both sides can jointly bear the weight of the passenger's back, achieving even load distribution and preventing excessive force on one side of the backrest teeth 2, which could lead to severe deformation or localized stress concentration. This, in turn, extends the service life of the first backrest teeth 111 or the second backrest teeth 121.

[0036] Specifically, such as Figure 1 As shown, the first backrest area 11 and the second backrest area 12 are distributed laterally at intervals. The first backrest area 11 is provided with a first backrest tooth 111, and the second backrest area 12 is provided with a second backrest tooth 121. Figures 1-4 The first backrest tooth portion 111 and the second backrest tooth portion 121 shown are positioned opposite each other. Figure 5 The first backrest teeth 111 and the second backrest teeth 121 shown are staggered, that is, cross-distributed. By setting the first backrest teeth 111 and the second backrest teeth 121 to be directly opposite each other, the load-bearing capacity and deformation capacity of the first backrest teeth 111 and the second backrest teeth 121 can be effectively improved. By setting the staggered distribution of the first backrest teeth 111 and the second backrest teeth 121, since the first backrest teeth 111 and the second backrest teeth 121 can mesh with each other, the gap between the teeth is reduced, which can improve the hardness and rigidity of the seat back frame 100, while ensuring the deformation capacity.

[0037] In some embodiments, the seat back frame 100 further includes a connector for connecting and fixing the first back tooth portion 111 and / or the second back tooth portion 121.

[0038] In other words, the connector can connect and fix the first backrest tooth 111 to the second backrest tooth 121, or the connector can connect and fix the first backrest tooth 111 to the second backrest area 12, or the connector can connect and fix the second backrest tooth 121 to the first backrest area 11, or the connector can connect and fix the first backrest tooth 111 to the first backrest tooth 111, or the connector can connect and fix the second backrest tooth 121 to the second backrest tooth 121, thereby achieving the connection and fixation of the first backrest tooth 111 and / or the second backrest tooth 121, and preventing the first backrest tooth 111 and the second backrest tooth 121 from being excessively bent and deformed.

[0039] Specifically, such as Figures 1-5 As shown, the connector connects and fixes the first backrest toothed portion 111 and the second backrest toothed portion 121. Figures 1-4 The connector shown is connected to both the first backrest toothed portion 111 and the second backrest toothed portion 121. Figure 5 The connector shown is connected to the first backrest tooth 111 or the second backrest tooth 121. The connector can have a certain elasticity, can deform to a certain extent and return to its initial state. The connector can deform with the deformation of the first backrest tooth 111 and the second backrest tooth 121 when the seat back frame 100 needs to be bent. However, the connector has a certain elastic limit. When the deformation of the first backrest tooth 111 and the second backrest tooth 121 is too large, it can pull the first backrest tooth 111 and the second backrest tooth 121 to avoid the first backrest tooth 111 and the second backrest tooth 121 from breaking or being unable to recover their deformation due to excessive deformation.

[0040] When a passenger is seated normally, the connector can deform or stretch as the first backrest tooth 111 and the second backrest tooth 121 bend. When a frontal collision occurs, the impact force will force the airbag to compress the passenger and push them backward against the seat. At this time, if the first backrest tooth 111 and the second backrest tooth 121 bend significantly in a certain area, they will be held in place by the connector to ensure that the first backrest tooth 111 and the second backrest tooth 121 do not break, thereby improving the safety performance of the seat.

[0041] In practical design, the connectors can be made of rigid or non-rigid materials. For example, when using rigid materials, the rigid materials can be bent steel wire suspension, hard spring, metal wire, etc. Rigid materials have high hardness, which can increase the connection stability and reliability between the first backrest tooth 111 and the second backrest tooth 121 after installation, making it less likely for the connection between the first backrest tooth 111 and the second backrest tooth 121 to break. However, it is not easy to adjust the seat stiffness after installation, and the weight is relatively heavy. When using non-rigid materials, the non-rigid materials can be high-strength fiber ropes such as nylon or ultra-high molecular weight polyethylene, which are easy to adjust and not easy to break or fail.

[0042] In some embodiments, a seat gap 3 is formed between the first backrest region 11 and the second backrest region 12. There are multiple first backrest teeth 111 and they are distributed sequentially along the length direction of the seat gap 3. There are multiple second backrest teeth 121 and they are distributed sequentially along the length direction of the seat gap 3. A connector is used to connect at least one first backrest tooth 111 with at least one second backrest tooth 121.

[0043] In other words, a certain distance is spaced between the first backrest area 11 and the second backrest area 12 to form a seat gap 3. The seat gap 3 can reduce the weight of the seat backrest frame 100 and also provide space for the deformation of the first backrest tooth 111 and the second backrest tooth 121, which can ensure that the first backrest tooth 111 and the second backrest tooth 121 can bend and deform smoothly and avoid interference. The first backrest tooth 111 and the second backrest tooth 121 can be configured as two, three, four or even more. By setting multiple first backrest teeth 111 and second backrest teeth 121, the bending deformation of multiple first backrest teeth 111 and multiple second backrest teeth 121 can slow down the speed of the human body leaning back. In addition, multiple first backrest teeth 111 and multiple second backrest teeth 121 can simultaneously support and distribute the load applied to the back, thereby reducing the force on a single first backrest tooth 111 and a single second backrest tooth 121 and preventing local stress concentration from causing the first backrest tooth 111 and the second backrest tooth 121 to break.

[0044] Since the first backrest area 11 and the second backrest area 12 are spaced apart in the left-right direction, the seat gap 3 formed between the first backrest area 11 and the second backrest area 12 extends along the height direction of the seat backrest frame 100. That is, the length direction of the seat gap 3 is the height direction of the seat backrest frame 100, which is also the vertical direction of the vehicle. Multiple first backrest teeth 111 can be sequentially distributed along the length direction of the seat gap 3, that is, multiple first backrest teeth 111 can be sequentially distributed in the vertical direction to adapt to the shape of the human back, so that the multiple first backrest teeth 111 can effectively support the human back in the vertical direction and can simultaneously bend backward. Similarly, multiple second backrest teeth 121 can be sequentially distributed along the length direction of the seat gap 3, that is, multiple second backrest teeth 121 can be sequentially distributed in the vertical direction to adapt to the shape of the human back, so that the multiple second backrest teeth 121 can... It effectively supports the human back in the vertical direction and can bend and deform backward at the same time. In this way, the distribution of multiple first backrest teeth 111 and multiple second backrest teeth 121 can adapt to the shape of the human back and the applied load, which facilitates the even distribution of load and effectively supports the back. At the same time, it ensures that multiple first backrest teeth 111 and multiple second backrest teeth 121 can bend and deform smoothly, and there will be no deformation interference between multiple first backrest teeth 111 and multiple second backrest teeth 121, and no foreign body sensation will be caused to the human back, thus ensuring riding comfort.

[0045] It is understandable that when a passenger is sitting in the seat, the first backrest tooth 111 and the second backrest tooth 121 will bend and deform backward at the same time, so that the gap between the first backrest tooth 111 and the second backrest tooth 121, i.e. the seat gap 3, becomes larger, thereby making the seat feel softer. When there is no passenger seat, the first backrest tooth 111 and the second backrest tooth 121 do not bend and deform, and are on the same plane to maintain the overall aesthetics of the seat back frame 100.

[0046] In some embodiments, a plurality of first backrest teeth 111 and a plurality of second backrest teeth 121 are distributed in a one-to-one correspondence in the lateral direction, and the connector is constructed as a connecting rope 4.

[0047] In other words, multiple first backrest teeth 111 and multiple second backrest teeth 121 are distributed in a one-to-one correspondence in the left-right direction, that is, one backrest tooth 111 and one second backrest tooth 121 are directly opposite each other in the left-right direction, so that the multiple first backrest teeth 111 and multiple second backrest teeth 121 form a parallel distribution. This facilitates the simultaneous deformation of the multiple first backrest teeth 111 and multiple second backrest teeth 121 and is easy to manufacture. The connecting member can be constructed as a connecting rope 4. The connecting rope 4 has adjustable tension, so the maximum deformation of the first backrest teeth 111 and the second backrest teeth 121 can be controlled by adjusting the tension of the connecting rope 4, thereby realizing the adjustment of the seat's firmness.

[0048] Furthermore, the connecting rope 4 connects multiple first backrest teeth 111 and multiple second backrest teeth 121 in a staggered manner; or, the connecting rope 4 includes a main rope body 41 and multiple sub-rope bodies 42, with the multiple sub-rope bodies 42, multiple first backrest teeth 111 and multiple second backrest teeth 121 corresponding one-to-one, each sub-rope body 42 connecting one first backrest tooth 111 to a corresponding second backrest tooth 121, and the main rope body 41 connecting the multiple sub-rope bodies 42.

[0049] Specifically, such as Figure 4 As shown, viewed from the back of the seat back frame 100, multiple first backrest teeth 111 and multiple second backrest teeth 121 are distributed in multiple layers along the vertical direction. Each layer has one first backrest tooth 111 and one second backrest tooth 121, and the first backrest teeth 111 and the second backrest teeth 121 of each layer are directly opposite each other. The end of the connecting rope 4 is connected to the topmost first backrest tooth 111, and then extends laterally to connect to the topmost second backrest tooth 121, and then continues diagonally downwards to connect sequentially. The first backrest tooth 111 and the second backrest tooth 121 are connected to the second backrest tooth 121 of the second layer, and then diagonally downwards to connect to the first backrest tooth 111 and the second backrest tooth 121 of the third layer. This process is repeated until the connecting rope 4 is connected to the first backrest tooth 111 and the second backrest tooth 121 of the bottom layer. In this way, the connecting rope 4 achieves the effect of sequentially and interlacing multiple first backrest tooth 111 and multiple second backrest tooth 121, forming multiple "Z"-shaped extensions connected in the vertical direction.

[0050] Therefore, the first backrest tooth 111 and multiple second backrest tooth 121 can be connected by a single connecting rope 4. By stretching one end of the connecting rope 4, the maximum deformation of multiple first backrest tooth 111 and multiple second backrest tooth 121 can be adjusted simultaneously, thereby achieving flexible and convenient adjustment of the firmness of the entire seat.

[0051] like Figure 2As shown, the connecting rope 4 includes a main rope body 41 and multiple sub-rope bodies 42. The number of sub-rope bodies 42 can be two, three, four, or even more. The number of sub-rope bodies 42 corresponds to the number of first backrest teeth 111 and second backrest teeth 121. That is, the number of sub-rope bodies 42 can be the same as the number of first backrest teeth 111 or second backrest teeth 121. Thus, each sub-rope body 42 can connect each first backrest tooth 111 and its corresponding second backrest tooth 121 laterally. In other words, one end of each sub-rope body 42 is connected to a first backrest tooth 111, and the other end is connected to the second backrest tooth 121 directly opposite that first backrest tooth 111, thereby achieving the effect that each sub-rope body 42 connects one first backrest tooth 111 to a corresponding second backrest tooth 121. The main rope body 41 can be one or more, such as... Figure 1 and Figure 2 As shown, when a main rope 41 is provided, the main rope 41 extends along the distribution direction of multiple sub-ropes 42, so as to connect the multiple sub-ropes 42 sequentially in the vertical direction, thereby connecting the multiple sub-ropes 42 with the main rope 41 into a whole, forming a complete connecting rope 4. This achieves the effect of the connecting rope 4 sequentially and alternately connecting multiple first backrest teeth 111 and multiple second backrest teeth 121, forming multiple "T"-shaped extensions connected vertically. When multiple main ropes 41 are provided, the multiple sub-ropes 42 can be sequentially connected in the vertical direction, thereby improving the overall reliability and stability of the connecting rope 4, preventing breakage, and making it easier to hold the first backrest teeth 111 and the second backrest teeth 121.

[0052] Therefore, by forming a complete connecting rope 4 from multiple sub-ropes 42 and the main rope 41, the connection between the first backrest tooth 111 and multiple second backrest tooth 121 can be achieved. By stretching one end of the main rope 41, the maximum deformation of multiple first backrest tooth 111 and multiple second backrest tooth 121 can be adjusted simultaneously, thereby achieving flexible and convenient adjustment of the firmness of the entire seat.

[0053] Of course, in actual design, the connecting rope 4 can also be extended into shapes such as "X", "S", and "M", offering flexible options and not limited to those described in this embodiment. And as... Figures 1-5 As shown, buckles 6 can be provided on the first backrest tooth 111, the second backrest tooth 121 and the seat back frame 100 to fix the connecting rope 4 to the first backrest tooth 111, the second backrest tooth 121 or the seat back frame 100 through the buckles 6, so as to ensure the installation stability and reliability of the connecting rope 4.

[0054] In some embodiments, the seat back frame 100 further includes a main pretension adjustment member 51, which is movably mounted on the seat back frame 100. The main pretension adjustment member 51 is connected to the connecting rope 4 and selectively pretensions a plurality of first backrest teeth 111 and a plurality of second backrest teeth 121 through the connecting rope 4.

[0055] Specifically, the main pretension adjustment member 51 is used to adjust the tension of the connecting rope 4, that is, to adjust the tightness of the connecting rope 4. The main pretension adjustment member 51 is movably installed on the seat back frame 100, that is, the main pretension adjustment member 51 is installed on the seat back frame 100 and can move relative to the seat back frame 100 to adjust the tension of the connecting rope 4. The main pretension adjustment member 51 is connected to the connecting rope 4 and selectively pretensions multiple first backrest teeth 111 and multiple second backrest teeth 121 through the connecting rope 4. That is, the main pretension adjustment member 51 is connected to the end of the connecting rope 4, so that the main pretension adjustment member 51 can move relative to the seat back frame 100 to pretension or not pretension the multiple first backrest teeth 111 and multiple second backrest teeth 121. When pretensioning, the connecting rope 4 is tightened, so that the connecting rope 4 pulls the multiple first backrest teeth 111 and multiple second backrest teeth 121 taut, reducing the tension of the first backrest teeth 111. The gap between the first backrest teeth 111 and the second backrest teeth 121 is reduced, thereby reducing the maximum deformation of the plurality of first backrest teeth 111 and the plurality of second backrest teeth 121, resulting in a higher overall seat hardness. When not pre-tightened, the tension of the connecting rope 4 is smaller, so that the pulling force of the connecting rope 4 on the plurality of first backrest teeth 111 and the plurality of second backrest teeth 121 is smaller, increasing the gap between the first backrest teeth 111 and the second backrest teeth 121, thereby increasing the maximum deformation of the plurality of first backrest teeth 111 and the plurality of second backrest teeth 121, resulting in a lower overall seat hardness and a softer feel.

[0056] Thus, by setting the main pretension adjustment component 51 to be connected to the connecting rope 4 and selectively pretensioning multiple first backrest teeth 111 and multiple second backrest teeth 121 through the connecting rope 4, the tension of the connecting rope 4 can be flexibly adjusted, thereby realizing the overall adjustment of the firmness of the seat.

[0057] In practical design, the main pretension adjustment component 51 can be configured as a knob-type adjustment mechanism, meaning the main pretension adjustment component 51 can be rotatably mounted on the seat back frame 100, allowing it to rotate relative to the seat back frame 100. One end of the connecting rope 4 can be fixedly connected to and wound around the main pretension adjustment component 51. Thus, when the main pretension adjustment component 51 rotates, the connecting rope 4 can be wound around it, increasing the overall tension of the connecting rope 4; or, the connecting rope 4 can be released from the main pretension adjustment component 51, decreasing the overall tension of the connecting rope 4. This achieves tension adjustment of the connecting rope 4. Furthermore, the main pretension adjustment component 51 can also be electrically adjustable for quick and convenient adjustment.

[0058] In other embodiments, such as Figure 4 As shown, the tooth length of the first backrest tooth 111 or the second backrest tooth 121 is L and the gap in the tooth direction is S, and satisfies 400mm≥2L+S≥200mm, and L≥50mm.

[0059] In other words, the tooth length of the first backrest tooth 111 can be set to a length greater than 50mm, such as 50mm, 55mm, 60mm, 65mm, or 70mm, and the tooth length of the second backrest tooth 121 can also be set to a length greater than 50mm, such as 50mm, 55mm, 60mm, 65mm, or 70mm. The tooth length of the first backrest tooth 111 and the tooth length of the second backrest tooth 121 can be the same or different. Preferably, the tooth length of the first backrest tooth 111 and the tooth length of the second backrest tooth 121 are the same. The tooth-shaped gap S, which is the distance between the ends of the relatively distributed first backrest tooth 111 and the second backrest tooth 121, and the tooth length L of the first backrest tooth 111 and the tooth length L of the second backrest tooth 121 and the tooth-shaped gap S, need to satisfy 400mm≥2L+S≥200mm to ensure that the deformation area formed by the first backrest tooth 111 and the second backrest tooth 121 can meet the deformation and rigidity requirements of the seat back frame 100. At the same time, it ensures that the first backrest tooth 111 and the second backrest tooth 121 have sufficient elasticity to deform and recover their deformation. In other words, it ensures that the overall rigidity of the seat back frame 100 is sufficient and that the elastic deformation requirement is sufficient.

[0060] And, in actual design, such as Figures 1-4 As shown, the tooth length of the first backrest tooth 111 can be increased from top to bottom, and the tooth length of the second backrest tooth 121 can be increased from top to bottom, so that the deformable area of ​​the seat back frame 100 can be increased from top to bottom, adapting to the load distribution pattern applied to the seat by the back when the human body sits, making the human body feel more comfortable.

[0061] In some embodiments, such as Figure 5 As shown, multiple first backrest teeth 111 and multiple second backrest teeth 121 are arranged alternately in a vertical direction. The connecting member is a connecting rope 4, which includes a first connecting rope 43 and a second connecting rope 44.

[0062] In other words, multiple first backrest teeth 111 and multiple second backrest teeth 121 are staggered along the height direction of the seat back frame 100, i.e., the vertical direction. That is, along the vertical direction, a first backrest tooth 111 is first set, then a second backrest tooth 121 is set downwards, then another first backrest tooth 111 is set downwards, then another second backrest tooth 121 is set downwards, and so on, so that multiple first backrest teeth 111 and multiple second backrest teeth 121 are staggered vertically. In this way, due to the smaller gaps, the rigidity of the seat back frame 100 can be improved. At the same time, it also ensures that the seat back frame 100 can be bent and deformed, making it convenient to manufacture and easy to form.

[0063] The connector can be constructed as a connecting rope 4, which has adjustable tension. By adjusting the tension of the connecting rope 4, the maximum deformation of the first backrest tooth 111 and the second backrest tooth 121 can be controlled, thereby adjusting the firmness of the seat.

[0064] Furthermore, each of the first backrest teeth 111 and the second backrest area 12 is connected by a second connecting rope 44, and / or each of the second backrest teeth 121 and the first backrest area 11 is connected by a first connecting rope 43.

[0065] Specifically, such as Figure 5 As shown, each first backrest tooth 111 protrudes towards the second backrest area 12, and each second backrest tooth 121 protrudes towards the first backrest area 11. One end of the second connecting rope 44 is connected to the first backrest tooth 111, and the other end of the second connecting rope 44 is connected to the second backrest area 12. Thus, each first backrest tooth 111 and the second backrest area 12 are connected by a second connecting rope 44. The gap between each first backrest tooth 111 and the second backrest area 12 can be adjusted by the second connecting rope 44, that is, the maximum deformation of the first backrest tooth 111 can be adjusted by the second connecting rope 44, thereby realizing the local adjustment of the firmness of the seat.

[0066] One end of the first connecting rope 43 is connected to the second backrest tooth 121, and the other end of the first connecting rope 43 is connected to the first backrest area 11. Thus, each second backrest tooth 121 and the first backrest area 11 are connected by a first connecting rope 43. The gap between each second backrest tooth 121 and the first backrest area 11 can be adjusted by the first connecting rope 43. That is, the maximum deformation of the second backrest tooth 121 can be adjusted by the first connecting rope 43, thereby realizing the local adjustment of the firmness of the seat.

[0067] Therefore, by setting the first connecting rope 43 and the second connecting rope 44, the maximum deformation of each first backrest tooth 111 and the maximum deformation of each second backrest tooth 121 can be adjusted, thereby realizing the local softness and hardness adjustment of the seat. Furthermore, when the first connecting rope 43 and the second connecting rope 44 work together, the overall softness and hardness adjustment of the seat can be realized, which is flexible, convenient and highly adjustable.

[0068] In some embodiments, the first backrest area 11 is provided with a first pretension adjustment member 52 corresponding to each second backrest tooth 121. The first pretension adjustment member 52 is connected to the first connecting rope 43 and is used to selectively pretension the second backrest tooth 121.

[0069] Specifically, the first pretension adjustment member 52 is used to adjust the tension of the first connecting rope 43, that is, to adjust the tightness of the first connecting rope 43. The first pretension adjustment member 52 is connected to the first connecting rope 43, so that the first pretension adjustment member 52 can drive the first connecting rope 43 to move, thereby tensioning or loosening the first connecting rope 43. The first pretension adjustment member 52 can selectively pretension the second backrest tooth portion 121 through the first connecting rope 43. That is, the first pretension adjustment member 52 is connected to the end of the connecting rope 4, so that the first connecting rope 43 can be tensioned or loosened through the first pretension adjustment member 52. The tension of the first connecting rope 43 is adjusted to either tighten or loosen the second backrest teeth 121. When tightened, the first connecting rope 43 is stretched, thereby pulling the second backrest teeth 121 taut and reducing the gap between the second backrest teeth 121 and the first backrest area 11. This results in a higher firmness of the seat in this area. When not tightened, the tension of the first connecting rope 43 is reduced, resulting in a lower pulling force on the second backrest teeth 121 and increasing the gap between the second backrest teeth 121 and the first backrest area 11. This results in a lower firmness and a softer seat in this area.

[0070] Thus, by setting the first pre-tension adjustment member 52 to be connected to the connecting rope 4 and selectively pre-tensioning the second backrest tooth 121 through the first connecting rope 43, the tension of the first connecting rope 43 can be flexibly adjusted, thereby realizing the adjustment of the seat firmness in the area near the second backrest tooth 121.

[0071] In other embodiments, the second backrest region 12 is provided with a second pretension adjustment member 53 corresponding to each first backrest tooth 111. The second pretension adjustment member 53 is connected to the second connecting rope 44 and is used to selectively pretension the first backrest tooth 111.

[0072] Specifically, the second pretension adjustment member 53 is used to adjust the tension of the second connecting rope 44, that is, to adjust the tightness of the second connecting rope 44. The second pretension adjustment member 53 is connected to the second connecting rope 44, so that the second pretension adjustment member 53 can drive the second connecting rope 44 to move, thereby tensioning or loosening the second connecting rope 44. The second pretension adjustment member 53 can selectively pretension the second backrest tooth portion 121 through the second connecting rope 44. That is, the second pretension adjustment member 53 is connected to the end of the second connecting rope 44, so that the second connecting rope 44 can be tensioned or loosened through the second pretension adjustment member 53. The tension can be adjusted to pre-tighten or not pre-tighten the first backrest teeth 111. When pre-tightened, the second connecting rope 44 is tightened, which pulls the first backrest teeth 111 taut, reducing the gap between the first backrest teeth 111 and the second backrest area 12, thus making the seat in this area firmer. When not pre-tightened, the tension of the second connecting rope 44 is smaller, which reduces the pulling force of the second connecting rope 44 on the first backrest teeth 111, increasing the gap between the first backrest teeth 111 and the second backrest area 12, thus making the seat in this area softer and less firm.

[0073] Thus, by setting the second pretension adjustment member 53 to be connected to the connecting rope 4 and selectively pretensioning the first backrest tooth 111 through the second connecting rope 44, the tension of the second connecting rope 44 can be flexibly adjusted, thereby realizing the adjustment of the seat firmness in the area near the first backrest tooth 111.

[0074] In a specific embodiment, such as Figure 5 As shown, the first backrest area 11 is provided with a plurality of first pretension adjustment members 52. The number of the plurality of first pretension adjustment members 52 corresponds to the number of the second backrest teeth 121. That is, each second backrest tooth 121 is provided with a first pretension adjustment member 52. One end of the first connecting rope 43 can be fixedly connected to the first pretension adjustment member 52 and wound around the first pretension adjustment member 52. The other end of the first connecting rope 43 can be fixedly connected to the second backrest tooth 121. Thus, when the first pretension adjustment member 52 rotates, it can drive one end of the first connecting rope 43 to be wound around the first pretension adjustment member 52, so as to increase the tension of the first connecting rope 43, thereby achieving pretensioning of the second backrest tooth 121.

[0075] Correspondingly, the second backrest area 12 is provided with a plurality of second pretension adjustment members 53. The number of the plurality of second pretension adjustment members 53 corresponds to the number of the first backrest teeth 111. That is, each first backrest tooth 111 is provided with a corresponding second pretension adjustment member 53. One end of the second connecting rope 44 can be fixedly connected to the second pretension adjustment member 53 and wound around the second pretension adjustment member 53. The other end of the second connecting rope 44 can be fixedly connected to the first backrest teeth 111. Thus, when the second pretension adjustment member 53 rotates, it can drive one end of the second connecting rope 44 to be wound around the second pretension adjustment member 53, so as to increase the tension of the second connecting rope 44, thereby achieving pretensioning of the first backrest teeth 111.

[0076] In practical design, such as Figure 5 As shown, buckles 6 can be provided on the first backrest tooth 111 and the second backrest tooth 121 to fix the first connecting rope 43 to the second backrest tooth 121 and the second connecting rope 44 to the first backrest tooth 111, thereby ensuring the installation stability and reliability of the connecting rope 4.

[0077] In other embodiments, such as Figure 5 As shown, the tooth length of the first backrest tooth 111 or the second backrest tooth 121 is L and the gap in the tooth direction is S, and satisfies 400mm≥L+S≥200mm.

[0078] In other words, the tooth length of the first backrest tooth 111 and the tooth length of the second backrest tooth 121 can be set to be the same or different. Preferably, the tooth length of the first backrest tooth 111 and the tooth length of the second backrest tooth 121 are set to be the same. The tooth-shaped gap S, that is, the distance between the tooth tip of the first backrest tooth 111 and the second backrest region 12 and the distance between the tooth tip of the second backrest tooth 121 and the first backrest region 11, are both S. The tooth length L of the first backrest tooth 111 and the tooth length L of the second backrest tooth 121 and the tooth-shaped gap S need to satisfy 400mm≥L+S≥200mm to ensure that the deformation area formed by the first backrest tooth 111 and the second backrest tooth 121 can meet the deformation and rigidity requirements of the seat back frame 100. At the same time, it ensures that the first backrest tooth 111 and the second backrest tooth 121 have sufficient elasticity to deform and recover their deformation. In other words, it ensures that the overall rigidity of the seat back frame 100 is sufficient and that the elastic deformation requirement is sufficient.

[0079] And, in actual design, such as Figure 5As shown, the tooth length of the first backrest tooth 111 can be increased from top to bottom, and the tooth length of the second backrest tooth 121 can be increased from top to bottom, so that the deformable area of ​​the seat back frame 100 can be increased from top to bottom, adapting to the load distribution pattern applied to the seat by the back when the human body sits, making the human body feel more comfortable.

[0080] In some embodiments, such as Figure 1 As shown, the seat back frame 100 includes a rear frame 101 and a bottom frame 102. The bottom frame 102 is the seat basin frame and is connected to the bottom of the rear frame 101. The backrest area 1 is located in the rear frame 101, that is, the rear frame 101 is the area for the passenger's back to lean against and mainly bears the weight of the passenger's back.

[0081] Since the seat back frame 100 is made entirely of thermoplastic composite material, the bottom frame 102 and the rear frame 101 can be quickly integrally formed. For example, the seat back frame 100 can be quickly formed by compression molding to form the rear frame 101 and the bottom frame 102. This process is convenient to manufacture, has high molding efficiency, and enables fully automated production, thereby improving production efficiency.

[0082] The production steps of the seat back frame 100 in this application are as follows: (1) Determine the shape of the seat back frame 100 and the installation method of the connectors according to the performance requirements of the seat; (2) Based on the shape of the seat back frame 100, use software to design the shape and layup scheme of the thermoplastic composite material in the flat state and the processing scheme of the thermoplastic composite material flat plate; (3) Process the thermoplastic composite material flat plate according to the processing scheme of the thermoplastic composite material flat plate; (4) Infrared heat the thermoplastic composite material flat plate, and then the robot grabs it and puts it into the mold for molding; (6) Use laser welding process to weld the splicing area on the bottom frame 102 to make it into a whole; (7) Install the connectors on the back tooth 2.

[0083] For example, when the seat back frame 100 is manufactured using carbon fiber, the specific steps are as follows: the material is a nylon matrix composite reinforced with T700 carbon fiber, with a layup scheme of [0 / 45 / -45 / 45 / -45 / 90]2s and an overall material thickness of 4mm; after baking in an infrared oven at 350℃, it is placed in a mold for molding, and then removed and ultrasonically welded to the break between the bottom frame 102 and the armrest area. The entire manufacturing process takes only 10 minutes; the connectors are installed in a "Z" shape and are made of ultra-high molecular weight polyethylene rope. Ultimately, the seat uses only 10mm thick foam material, and its comfort is better than that of 20mm thick foam material, resulting in a weight reduction of 1.8kg for the entire seat.

[0084] This utility model also proposes a vehicle.

[0085] The vehicle according to the present invention includes the seat back frame 100 of any of the above embodiments.

[0086] According to the vehicle of the present invention, by using thermoplastic composite material to make the seat back frame 100, the load-bearing capacity and impact resistance of the seat back frame 100 can be effectively improved, the weight of the seat back frame 100 can be reduced, the seat back frame 100 can be made lightweight, the manufacturing efficiency can be improved and the cost can be reduced. By setting the seat back frame 100 to include at least two backrest areas 1, at least a portion of the two adjacent backrest areas 1 are spaced apart, and at least one of the two adjacent backrest areas 1 is provided with a backrest tooth 2 protruding towards the other, the overall thickness and weight of the seat can be reduced while ensuring the comfort of the ride, thereby achieving the thinning of the seat, which can increase the rear space, reduce the space occupied by the seat in the vehicle, reduce the overall weight of the vehicle, and facilitate the lightweighting of the vehicle.

[0087] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0088] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A seat back frame, characterized in that, The seat back frame is made of thermoplastic composite material and includes at least two back areas (1), at least partially spaced apart from each other, and at least one of the adjacent back areas (1) is provided with back teeth (2) protruding toward the other.

2. The seat back frame according to claim 1, characterized in that, The backrest area (1) consists of two parts, namely the first backrest area (11) and the second backrest area (12). The first backrest area (11) and the second backrest area (12) are distributed laterally, and / or the first backrest area (11) is provided with a first backrest tooth (111) and the second backrest area (12) is provided with a second backrest tooth (121).

3. The seat back frame according to claim 2, characterized in that, It also includes a connector for connecting and fixing the first backrest tooth (111) and / or the second backrest tooth (121).

4. The seat back frame according to claim 3, characterized in that, A seat gap (3) is formed between the first backrest area (11) and the second backrest area (12). There are multiple first backrest teeth (111) and they are distributed sequentially along the length direction of the seat gap (3). There are multiple second backrest teeth (121) and they are distributed sequentially along the length direction of the seat gap (3). The connector is used to connect at least one first backrest tooth (111) with at least one second backrest tooth (121).

5. The seat back frame according to claim 4, characterized in that, Multiple first backrest teeth (111) and multiple second backrest teeth (121) are distributed in a one-to-one correspondence in the transverse direction, and the connector is constructed as a connecting rope (4). The connecting rope (4) connects multiple first backrest teeth (111) and multiple second backrest teeth (121) in a staggered manner; or, the connecting rope (4) includes a main rope body (41) and multiple sub-rope bodies (42), with multiple sub-rope bodies (42), multiple first backrest teeth (111) and multiple second backrest teeth (121) corresponding one-to-one, each sub-rope body (42) connecting one first backrest tooth (111) to one corresponding second backrest tooth (121), and the main rope body (41) connecting multiple sub-rope bodies (42).

6. The seat back frame according to claim 5, characterized in that, It also includes a main pretension adjustment member (51), which is movably mounted on the seat back frame. The main pretension adjustment member (51) is connected to the connecting rope (4) and selectively pretensions a plurality of first back teeth (111) and a plurality of second back teeth (121) through the connecting rope (4). And / or, the tooth length of the first backrest tooth (111) or the second backrest tooth (121) is L and the gap in the tooth direction is S, and satisfies 400mm≥2L+S≥200mm, and L≥50mm.

7. The seat back frame according to claim 4, characterized in that, Multiple first backrest teeth (111) and multiple second backrest teeth (121) are arranged alternately in a vertical direction. The connector is constructed as a connecting rope (4), which includes a first connecting rope (43) and a second connecting rope (44). Each of the first backrest teeth (111) and the second backrest area (12) is connected by a second connecting rope (44), and / or each of the second backrest teeth (121) and the first backrest area (11) is connected by a first connecting rope (43).

8. The seat back frame according to claim 7, characterized in that, The first backrest area (11) is provided with a first pre-tightening adjustment member (52) corresponding to each of the second backrest teeth (121). The first pre-tightening adjustment member (52) is connected to the first connecting rope (43) and is used to selectively pre-tighten the second backrest teeth (121). And / or, the second backrest area (12) is provided with a second pretension adjustment member (53) corresponding to each of the first backrest teeth (111), the second pretension adjustment member (53) being connected to the second connecting rope (44) and used to selectively pretension the first backrest teeth (111); And / or, the tooth length of the first backrest tooth (111) or the second backrest tooth (121) is L and the gap in the tooth direction is S, and satisfies 400mm≥L+S≥200mm.

9. The seat back frame according to claim 1, characterized in that, The seat back frame includes a rear frame (101) and a bottom frame (102), the bottom frame (102) is connected to the bottom of the rear frame (101), and the backrest area (1) is located on the rear frame (101).

10. A vehicle, characterized in that, The seat back frame includes any one of claims 1-9.

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