Vehicle seat and motor vehicle

Abstract

The invention relates to a vehicle seat (100) comprising a backrest (102) having a backrest body (103) and at least one backrest side wing (204) arranged laterally of the backrest body. The vehicle seat further comprises a mechanical coupling device (10) for coupling the backrest body to the backrest side wing, which is configured in such a way that the coupling device is in a coupled state when the backrest body is inclined rearward from the design position by an angle less than a predetermined angle threshold value, and the coupling device is in a non-coupled state when the backrest body is inclined rearward from the design position by an angle less than the predetermined angle threshold value. The coupling device is designed such that the backrest side wing is coupled to the backrest body and thus the backrest side wing can be driven by the backrest body, and the coupling device is switched from the coupled state into the disengaged state when the backrest body is inclined rearward from the design position by an angle reaching a predetermined angle threshold value, the backrest body can be separated from the backrest side wings and can move independently. By means of the coupling device, the vehicle seat can be adapted to the interior of the vehicle in an improved manner.

Description

Technical Field

[0001] This application relates to a vehicle seat and a motor vehicle having such a vehicle seat. Background Technology

[0002] With the development of vehicle technology, the requirements for the comfort and functionality of vehicle seats are becoming increasingly stringent. The maximum possible width of the vehicle seat backrest can contribute to improved comfort. Some known vehicle seat backrests can be flipped back from a roughly upright design position, for example, to a roughly horizontal position, allowing the seat to function as a sleeping area for occupants to rest. However, the goal of maximizing the width of the vehicle seat backrest may conflict with the design goal of using the seat as a sleeping area. This is because wheel arches in the vehicle's interior can interfere with the backrest during the flipping process from its designed position to a horizontal position. To avoid such interference, either a limited backrest width or a limited maximum tilt angle must be tolerated. Summary of the Invention

[0003] The objective of this invention is to provide a vehicle seat and a motor vehicle having such a vehicle seat, wherein the backrest width of the vehicle seat can be optimally adapted to the space of the vehicle interior.

[0004] The task is achieved by a vehicle seat including a backrest having a backrest body and at least one backrest wing disposed on the side of the backrest body; the vehicle seat also includes a mechanical coupling device for coupling the backrest body to the backrest wing, the coupling device being configured such that when the backrest body tilts backward from a designed position at an angle less than a predetermined angle threshold, the coupling device is in a coupled state, such that the backrest wing is coupled to the backrest body and thus the backrest wing can be driven by the backrest body, and when the backrest body tilts backward from the designed position at an angle reaching the predetermined angle threshold, the coupling device transitions from the coupled state to a disengaged state, such that the backrest body can separate from the backrest wing and move independently.

[0005] In the case of the vehicle seat according to the invention, the backrest of the vehicle seat can be optimized in terms of its width, and at the same time, during the process of the backrest of the vehicle seat flipping backward from the designed position to the predetermined maximum tilt angle, there will be no problem of interference between the backrest of the vehicle seat and the wheel hub, even though the total backrest width is greater than the net distance between the two opposing wheel hubs.

[0006] In some embodiments, the backrest body can tilt backward from its designed position to a maximum until the backrest body is approximately horizontal. It is understood that the maximum backward tilt angle of the backrest body relative to the vertical line can be designed according to actual needs. For example, the maximum backward tilt angle of the backrest body relative to the vertical line can be 70°, 75°, or 80°, or the maximum angle of the backrest body relative to the forward-extending horizontal line can be 160°, 165°, or 170°, or the backrest body can have any other suitable tilt angle.

[0007] In some embodiments, the coupling device includes a control curve and a linkage pin assembly guided by the control curve. One of the backrest body and the backrest side wing is provided with a mating groove. When the angle at which the backrest body tilts backward from its designed position is less than a predetermined angle threshold, the linkage pin assembly is inserted into and held by the mating groove, and the coupling device is in a coupled state. When the angle at which the backrest body tilts backward from its designed position reaches the predetermined angle threshold, the linkage pin assembly disengages from the mating groove, and the coupling device transitions from a coupled state to a disengaged state.

[0008] In some embodiments, the backrest body is provided with the engagement groove, and the linkage pin assembly is inserted into the gap of the backrest side wing.

[0009] In some embodiments, the backrest side wing is provided with the engagement groove, and the linkage pin assembly is directly or indirectly connected to the backrest body.

[0010] In some embodiments, the engagement groove is an undercut.

[0011] In some embodiments, the coupling device includes a linkage rod that can be permanently driven by the backrest body, the linkage rod and the backrest side wing being rotatable about a common axis of rotation. In a further embodiment, the linkage rod has the engagement groove; or the linkage pin assembly remains connected to the linkage rod and the backrest side wing is provided with the engagement groove.

[0012] In some embodiments, the backrest body and the linkage are connected in the end region of the linkage away from the axis of rotation.

[0013] In some embodiments, the coupling device includes a connecting piece fixedly connected to the backrest body, the connecting piece having a first section extending from the backrest body and a second section bent relative to the first section. In a further embodiment, the second section has the engagement groove; or the linkage pin assembly remains connected to the second section and the backrest side wing is provided with the engagement groove.

[0014] In some embodiments, the backrest body has the engagement groove; or the linkage pin assembly is directly connected to the backrest body and the backrest side wings are provided with the engagement groove.

[0015] In some embodiments, the vehicle seat includes an elastic element, particularly a spring, connected to a backrest wing. When the backrest body tilts backward beyond a predetermined angle threshold, the elastic element is tensioned, such that the backrest wing is held by elastic force at its maximum tilting angle position.

[0016] In some embodiments, the vehicle seat includes an elastic element, particularly a spring, which is connected to the backrest side wing on one side and to a linkage rod on the other. When the backrest body tilts backward beyond a predetermined angle threshold, the elastic element is tensioned, so that the backrest side wing is held in its maximum backward tilt position by elastic force.

[0017] In some embodiments, the vehicle seat includes an elastic element, particularly a spring, which is connected on one hand to a side wing of the backrest and on the other hand to an elastic element suspension point extending from the base or to the second section.

[0018] In some embodiments, the vehicle seat includes an elastic element, particularly a spring, which is connected on one side to a backrest wing and on the other side to an elastic element suspension point extending from the base or from the backrest body.

[0019] In some embodiments, the spring is a torsion spring, such as a helical torsion leaf spring or a helically wound leaf spring.

[0020] In some embodiments, the linkage and the backrest side wing have a cooperating stop for defining the maximum rearward tilt position of the backrest body.

[0021] In some implementations, one end of the control curve forms a stop point for defining the maximum angle position of the backrest side wing's rearward tilt.

[0022] In some embodiments, the backrests of two single seats are integrated side by side in the backrest body, and the vehicle seat includes two backrest wings disposed on both sides of the backrest body, each backrest wing being equipped with a mechanical coupling device.

[0023] In some embodiments, the backrest body is equipped with an angle adjuster and a drive motor, the drive motor being able to drive the backrest body by means of the angle adjuster to adjust the tilt angle of the backrest body.

[0024] In some embodiments, the angle adjuster is an eccentric angle adjuster, and the linkage has an elongated hole in its end region away from the axis of rotation, for receiving a connecting element that connects the backrest body to the linkage in the elongated hole and allowing it to slide along the elongated hole.

[0025] In some implementations, the angle adjuster is a concentric angle adjuster.

[0026] In some implementations, the gap of the backrest side wing and the control curve are orthogonal at their intersection.

[0027] In some embodiments, the backrest body can be folded forward from its designed position to a predetermined angle position.

[0028] In some embodiments, the coupling device is configured to be in a coupled state when the backrest body is in a designed position and a predetermined angle position folded forward, such that the backrest side wings are coupled to the backrest body and thus the backrest side wings can be driven by the backrest body.

[0029] In some embodiments, the control curve has an arc segment in which the linkage pin assembly can be guided when the backrest body folds forward from the designed position, such that the linkage pin assembly is held by the engagement groove.

[0030] In some implementations, as the backrest body folds forward from its designed position, the linkage pin assembly disengages from the control curve and is held in place by the engagement groove.

[0031] In some embodiments, the control curve is configured as a groove. Here, the linkage pin assembly is slidable along the groove, wherein two opposing walls of the groove can guide the linkage pin assembly on both sides.

[0032] In some embodiments, the control curve is configured as a slide that guides the linkage pin assembly on one or one side. Here, the linkage pin assembly is slidable along the slide, wherein a body defining the slide guides the linkage pin assembly on one or one side, while the linkage pin assembly on the other side either lacks a guiding member or additionally has a retaining member to hold the linkage pin assembly on the slide. For example, the slide can be formed by the outer peripheral edge of the body.

[0033] The objective of the invention is also achieved by a motor vehicle having a vehicle seat according to any embodiment of the invention. The motor vehicle thus possesses the advantages derived from the vehicle seat.

[0034] In some implementations, the motor vehicle is a passenger car.

[0035] In some implementations, the motor vehicle is a vehicle driven solely by an internal combustion engine, or a pure electric vehicle, or a hybrid vehicle.

[0036] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0037] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of the present invention to further explain its characteristics, features, advantages, and implementation methods. The drawings are as follows:

[0038] Figures 1 to 4 The figures show perspective views of a vehicle seat for a motor vehicle in different states according to an embodiment of the present invention.

[0039] Figure 5 yes Figure 1 A perspective view of a portion of the frame of a vehicle seat backrest.

[0040] Figure 6 and Figure 7 yes Figure 5 Different exploded views of the backrest frame.

[0041] Figure 8 yes Figure 1 An exploded view of a portion of a vehicle seat.

[0042] Figure 9 This is a schematic diagram of the control curves for the coupling device of the vehicle seat.

[0043] Figure 10 This is a schematic diagram of the linkage rod of the vehicle seat coupling device.

[0044] Figure 11 This is a partial schematic diagram of the linkage rod of the coupling device in the designed position of the vehicle seat.

[0045] Figure 12 This is a partial schematic diagram of the side wing of the vehicle seat back when it is in the designed position of the vehicle seat.

[0046] Figure 13 This is a partial schematic diagram of the linkage rod of the coupling device in the separated position of the side wing of the vehicle seat back.

[0047] Figure 14This is a partial schematic diagram of the side wing of the vehicle seat back when it is in the separated position.

[0048] Figure 15 This is a partial schematic diagram of the linkage rod of the coupling device when the back of the vehicle seat is in its maximum backward tilt position.

[0049] Figure 16 This is a partial schematic diagram of the side wings and linkage of the vehicle seat back when the vehicle seat back is in its maximum backward tilt position.

[0050] Figure 17 This is an exploded view of a portion of a vehicle seat according to a second embodiment of the present invention.

[0051] Figure 18 This is a perspective view of a portion of a vehicle seat according to a third embodiment of the present invention.

[0052] Figure 19 and Figure 20 yes Figure 18 A perspective view of two components of a vehicle seat.

[0053] Figure 21 This is a perspective view of a portion of a vehicle seat according to a fourth embodiment of the present invention.

[0054] Figure 22 and Figure 21 A schematic diagram of the connecting plate on the seat adjuster of a vehicle. Detailed Implementation

[0055] In the accompanying drawings, identical components and components with the same function are given the same reference numerals. For the sake of brevity, repeated descriptions for different embodiments may be omitted; therefore, for components and structures not described in detail for one embodiment, reference can be made to detailed descriptions of similar components and structures for other embodiments.

[0056] Several exemplary embodiments will now be described more fully with reference to the accompanying drawings. It should be understood that elements not essential for understanding the invention may be omitted from the drawings for ease of illustration and understanding. In the drawings, the same reference numerals may denote the same parts or parts that function identically. Numerous specific details, such as examples of specific parts, devices, and methods, are set forth in the following description to provide a thorough understanding of embodiments of this disclosure. It will be apparent to those skilled in the art that not all of these specific details are necessarily required. The exemplary embodiments should not be construed as limiting.

[0057] Figures 1 to 4The diagram shows a perspective view of a vehicle seat 100 for a motor vehicle according to an embodiment of the present invention in different states. The motor vehicle may be a passenger car, such as a vehicle driven solely by an internal combustion engine, a pure electric vehicle, or a hybrid vehicle.

[0058] The vehicle seat 100 includes a seat cushion 101 and a backrest 102. The backrest 102 includes a backrest body 103 and two backrest side wings 204 disposed on both sides of the backrest body 103 in the lateral direction, or in the width direction. The vehicle seat 100 constitutes a seat row, integrating two individual seats. Here, the backrest 102 can be adjusted independently of the seat cushion 101. Figure 1 In the illustrated configuration, the vehicle seat 100 is in its designed position, and the mechanical coupling device 10, which will be described in more detail below, is in its coupled state. In this designed position, the occupant can comfortably sit in the vehicle seat, with the backrest body 103 and the backrest side wings 204 jointly providing backrest functionality. Figure 2 In the illustrated state, the backrest 102 of the vehicle seat 100 is flipped backward by a first angle from its designed position to reach a separated position. In this separated position, the coupling device 10 transitions from a coupled state to a disengaged state, and the backrest body 103 and the backrest side wing 204 are discoupled. Figure 3 In the illustrated configuration, the backrest body 103 of the vehicle seat 100's backrest 102 is further folded into a reclining position, while the backrest side wings 204 remain in their maximum tilted rearward position. The vehicle seat 100 can be positioned as follows: Figure 3 Returning to the lying position shown Figure 2 The separation location shown, and the possibility of further returning to, as Figure 1 The design location is shown. In Figure 4 In the illustrated configuration, the backrest 102 of the vehicle seat 100 is folded forward from its designed position, with the coupling device in a coupled state. Folding the vehicle seat 100 forward frees up additional space in the vehicle interior.

[0059] Generally, the vehicle seat 100 includes a mechanical coupling device 10 for coupling a backrest body 103 to a backrest side wing 204. The coupling device is configured such that when the backrest body 103 tilts backward from its designed position at an angle less than a predetermined angle threshold, the coupling device is in a coupled state, such that the backrest side wing 204 is coupled to the backrest body 103 and thus can be driven by the backrest body 103. When the backrest body 103 tilts backward from its designed position at an angle reaching the predetermined angle threshold, the coupling device transitions from the coupled state to a disengaged state, such that the backrest body 103 can separate from the backrest side wing 204 and move independently.

[0060] In an alternative embodiment (not shown), the vehicle seat can also be configured as a single seat. Two such single seats are arranged side-by-side, each with a backrest having a backrest wing on its outer side and no backrest wing on its inner side. The backrests of the two single seats can be adjusted independently of each other, and can be adjusted in conjunction with... Figures 1 to 4 The vehicle seat 100 shown has similar functions and can occupy various corresponding postures.

[0061] In another alternative embodiment (not shown), the seat cushion and backrest of the vehicle seat can be adjusted in angle together. For example, the seat cushion can be equipped with a five-bar linkage, thereby allowing the seat cushion angle to be adjusted and thus the backrest angle to be adjusted together. The vehicle seat can also be coupled with... Figures 1 to 4 The vehicle seat 100 shown has similar functions and can occupy various corresponding postures.

[0062] Figure 5 This is a perspective view of a portion of the frame of the backrest 102 of the vehicle seat 100 according to a first embodiment of the present invention. Here, only one backrest wing 204 on one side of the backrest body 103 and its associated coupling device 10 are described. The backrest wing 204 and its associated coupling device 10 on the other side of the backrest body 103 may be configured in the same or similar manner. Figure 6 and Figure 7 yes Figure 5 Different exploded views of the backrest frame, and Figure 8 This is an exploded view of a portion of vehicle seat 100. Figure 8 Details of one of the backrest side wings 204, the associated coupling device, and related components of the backrest body 103 are shown.

[0063] like Figure 8 As shown, in a first embodiment of the vehicle seat 100, the backrest body 103 is equipped with an adjuster 135, which is mounted in a base 136, also referred to as the lower connecting plate of the adjuster. Here, the adjuster 135 is an eccentric adjuster. The upper connecting plate 132 of the adjuster is fixed to the backrest upright 133, for example, by welding. The drive motor 104 is mounted to the backrest body 103 by means of a motor bracket 131 and a motor fastening bolt 139, specifically on the upper connecting plate 132 of the adjuster. The drive motor 104 can drive the adjuster 135 to adjust the backrest tilt angle of the backrest body 103.

[0064] In a first embodiment of the vehicle seat 100, the coupling device 10 includes a linkage 202 that can be permanently driven by the backrest body 103. The backrest side wing 204 and the linkage 202 are rotatably mounted to the base 136 about a common axis of rotation. The backrest upright 133 of the backrest body 103 can be connected to the linkage 202 at its upper end via a drive pin 134. This drive pin 134 is fixedly connected to the backrest upright 133, for example, by welding, and connected to the linkage 202, for example, by means of a screw or pin 203 fastened to the drive pin 134 through the linkage 202. Since the adjuster 135 is configured as an eccentric adjuster, the linkage 202 may have an elongated hole 23 at its upper end (see...). Figure 10 The drive pin 134 can slide in the elongated hole. To ensure smooth sliding of the drive pin 134 in the elongated hole and reduce noise, the elongated hole can be fitted with an elongated hole bushing 201 made of plastic.

[0065] In a first embodiment of the vehicle seat 100, the coupling device 10 includes a control curve 11 and a linkage pin assembly 207, and the backrest body 103 is provided with an engagement groove 21. The linkage pin assembly 207 is guided by the control curve 11 and inserted into the gap 20 of the backrest side wing 204, such that: when the backrest body 103 tilts backward from its designed position at an angle less than a predetermined angle threshold, the linkage pin assembly 207 is held by the engagement groove 21, and the coupling device is in a coupled state; and when the backrest body 103 tilts backward from its designed position at an angle reaching the predetermined angle threshold, the linkage pin assembly 207 disengages from the engagement groove 21, and the coupling device transitions from the coupled state to a disengaged state. In a particularly advantageous embodiment, the gap 20 of the backrest side wing 204 and the control curve 11 can be orthogonal at their intersection.

[0066] In the first embodiment, the control curve 11 can be achieved via a groove in the cam plate 138. The cam plate 138 itself can be fixed to the base 136, for example, welded to the base 136. To facilitate smooth sliding of the linkage pin assembly 207 in the groove and reduce motion noise, the groove can be fitted with a groove bushing 137 made of plastic. Similarly, the gap 20 in the backrest side wing 204 for receiving the linkage pin assembly 207 can also be fitted with a gap bushing 206 made of plastic.

[0067] exist Figure 9The control curve 11 is shown in detail. Here, angle position A2 corresponds to the designed position of the backrest 102 of the vehicle seat 100, angle position A3 corresponds to the maximum rearward angle position of the backrest side wing 204, and angle position A1 corresponds to the maximum forward folding angle position of the backrest 102. The control curve 11 is an arc segment between angle positions A1 and A2, and a rising segment with a gradually increasing dimension in the radial direction between angle positions A2 and A3. The arc segment is optional; in other words, it may not be present even if the backrest 102 of the vehicle seat 100 can fold forward. In an alternative embodiment not shown, the control curve 11 may also be configured as a slide that guides the linkage pin assembly 207 on one side.

[0068] To rotatably support the backrest side wing 204 and the linkage rod 202, a stepped bolt 212 can be used, which can pass through corresponding mounting holes 22 in the cam plate 138, in the lower region of the linkage rod 202, and in the side wing lower connecting plate 205 of the backrest side wing 204 (see...). Figure 10 And it is axially secured at one end with a nut 215. For example, in Figure 8 As schematically illustrated, at least one mounting hole may be fitted with a mounting hole bushing made of, for example, metal and / or plastic and / or other suitable materials. For example, the mounting hole 22 in the lower region of the linkage 202 and the corresponding mounting hole in the lower connecting plate 205 of the side wing of the backrest wing 204 may be fitted with a mounting hole bushing 210, 208, respectively.

[0069] The linkage pin assembly 207 may include a pin body, which can be axially fixed on one side by a screw 211 and fixed on the other side by a nut 214.

[0070] In the first embodiment, the linkage 202 has a engagement groove 21 as mentioned above. To facilitate smooth sliding of the linkage pin assembly 207 in the engagement groove 21 and reduce motion noise, the engagement groove 21 may be provided with an engagement groove bushing 213 made of plastic.

[0071] The linkage 202 can be elastically connected to the backrest side wing 204 via an elastic element 209. Here, the elastic element 209 can be configured as a spring, more specifically as a torsion spring or a helically wound leaf spring. The inner end of the torsion spring is held on the backrest side wing 204 via a spring suspension point 216, and the outer end of the torsion spring is held on the linkage 202 via a spring suspension point. When the backrest body 103 tilts backward beyond a predetermined angle threshold, the elastic element 209 is tensioned, so that the backrest side wing 204 is held at its maximum backward tilt angle position by elastic force, especially spring force.

[0072] Figure 11 and 12 This is a partial schematic diagram of the linkage 202 and the backrest side wing 204 when the vehicle seat 100 is in its designed position. (As shown in the diagram...) Figure 11 As can be seen, the linkage pin assembly 207 is held by the engagement groove 21 of the linkage rod 202, and the coupling device 10 is in a coupled state. For example, by... Figure 12 As can be seen, the elastic element 209 is in the initial state, and the stop point 24 of the linkage rod 202 and the stop point 31 of the backrest side wing 204 are spaced apart in the circumferential direction.

[0073] Figure 13 and 14 This is a partial schematic diagram of the linkage 202 and the backrest side wing 204 when the vehicle seat 100 is in the separated position. (As shown by...) Figure 13 As can be seen, one end of the control curve 11 serves as a stop point for the linkage pin assembly 207, which limits the maximum tilt position of the backrest side wing 204. At this time, the linkage pin assembly 207 is no longer held by the engagement groove 21 of the linkage rod 202, and the coupling device 10 transitions from the coupled state to the disengaged state. (As shown by...) Figure 14 It can be seen that the elastic element 209 is still in the initial state, and the stop point 24 of the linkage rod 202 and the stop point 31 of the backrest side wing 204 are still spaced apart in the circumferential direction.

[0074] Figure 15 and 16 This is a partial schematic diagram of the linkage 202 and the side wing 204 of the backrest when the vehicle seat 100 is in the reclined position. (As shown in the diagram...) Figure 15 As can be seen, the linkage pin assembly 207 emerges from the engagement groove 21 of the linkage rod 202. The linkage rod 202 and the backrest body 103 extend approximately horizontally, allowing the approximately horizontally extending seat cushion 101 and the approximately horizontally extending backrest body 103 to together form a bedding unit. (As shown by...) Figure 15 As can be seen, the elastic element 209 is fully tensioned, and the stop point 24 of the linkage rod 202 and the stop point 31 of the backrest side wing 202 are in contact with each other, which limits the maximum tilt position of the linkage rod 202 and the backrest body 103.

[0075] In a variation of the first embodiment, the engagement groove 21 may also be provided in the backrest side wing 204, and the linkage pin assembly 207 is now connected to the linkage rod 202. To ensure that the linkage pin assembly 207 is guided along the control curve 11, the linkage rod 202 may now have a corresponding gap 20. The engagement groove 21 in the backrest side wing 204 opens rearward, opposite to that in the first embodiment, to allow the linkage pin assembly 207 to disengage from and re-engage with the engagement groove 21.

[0076] The embodiments described below can also be modified in a similar way. For the sake of brevity, they will not be described again.

[0077] Figure 17 This is an exploded view of a portion of a vehicle seat 100 according to a second embodiment of the present invention. The main difference between this second embodiment and the aforementioned first embodiment is that the adjuster 135 is a concentric adjuster. Instead of the elongated hole 23 in the upper end of the linkage 202 in the first embodiment, only a circular hole for receiving a screw or pin 203 needs to be provided in the upper end of the linkage 202. Therefore, the linkage 202 can be configured shorter in the second embodiment. In other respects, the second embodiment can be configured the same as or similarly to the first embodiment.

[0078] Figure 18 This is a perspective view of a portion of a vehicle seat 100 according to a third embodiment of the present invention. The main difference between this third embodiment and the aforementioned first embodiment is that the adjuster 135 is a concentric adjuster, replacing the linkage rod 202 in the first embodiment, and a connecting piece 240 is provided, which is fixedly connected to the backrest body 103, for example, by welding. Figure 19 As shown, the connecting piece 240 has a first section 42 extending from the backrest body 103 and a second section 43 bent relative to the first section 42, the second section 43 having an engagement groove 21. Furthermore, a spring suspension point 241 is fixed to, for example, welded to, the base 136. An elastic element 209 is held at its inner end on a spring suspension point 216 of the lower connecting portion 205 of the backrest side wing 204, and at its outer end on a spring suspension point 241. In a variant embodiment not shown, the spring suspension point 241 may also be provided by a suitable component of the backrest body 103.

[0079] Figure 21 This is a perspective view of a portion of a vehicle seat 100 according to a fourth embodiment of the present invention. Here, the adjuster 135 is also a concentric adjuster. In this embodiment, the linkage 202 as in the first embodiment is omitted, and the engagement groove 21 is directly integrated into the backrest body 103, and more specifically, it can be directly integrated into the connecting plate 132 on the adjuster. In addition, as in the third embodiment, a spring suspension point 241 is also additionally provided.

[0080] In the illustrated embodiments, the control curve 11 is formed by a groove in a single cam plate 138. In alternative embodiments, the coupling device 10 may also include two identical cam plates 138 side-by-side, each having a groove in which the linkage pin assembly 207 is guided. Two side-by-side grooves can contribute to improved stability.

[0081] It should be noted that the terminology used herein is for illustrative purposes only and is not intended to limit the disclosure. The singular forms “a” and “the one” as used herein should include the plural forms unless the context explicitly states otherwise. It is understood that the terms “comprising” and “including,” and other similar terms, when used in the application documents, specifically describe the presence of the stated operation, element, and / or component, without excluding the presence or addition of one or more other operations, elements, components, and / or combinations thereof. The term “and / or” as used herein includes all arbitrary combinations of one or more of the associated listed items. In the description of the drawings, similar reference numerals always denote similar elements.

[0082] The thickness of the elements in the accompanying drawings may be exaggerated for clarity. It is also understood that if an element is described as being on, coupled to, or connected to another element, then the element may be directly formed on, coupled to, or connected to the other element, or there may be one or more intermediate elements between them. Conversely, if the expressions "directly on," "directly coupled to," and "directly connected to" are used herein, it indicates that there is no intermediate element. Other terms used to describe relationships between elements should be interpreted similarly, such as "between" and "directly between," "attached" and "directly attached," "adjacent" and "directly adjacent," etc.

[0083] Terms such as “top,” “bottom,” “above,” “below,” “over,” “under,” etc., are used to describe the relationship of one element, layer, or region relative to another element, layer, or region, as shown in the accompanying drawings. It is understood that these terms should also encompass other orientations of the device in addition to those described in the accompanying drawings.

[0084] It is understood that although the terms "first," "second," etc., may be used herein to describe different elements, these elements should not be limited by these terms. These terms are merely used to distinguish one element from another. Therefore, a first element may be referred to as a second element without departing from the teachings of the inventive concept.

[0085] It can also be considered that all the exemplary embodiments disclosed herein can be arbitrarily combined with each other. Finally, it should be noted that the above embodiments are merely for understanding the present invention and do not constitute a limitation on the scope of protection of the present invention. For those skilled in the art, modifications can be made based on the above embodiments, and these modifications do not depart from the scope of protection of the present invention.

Claims

1. A vehicle seat (100) comprising a backrest (102) having a backrest body (103) and at least one backrest side wing (204) arranged alongside the backrest body, characterized in that The vehicle seat further comprises a mechanical coupling device (10) for coupling the backrest body with the backrest side wing, the coupling device being configured such that, when the backrest body is tilted back from the design position by an angle which is less than a predetermined angle threshold, the coupling device is in a coupled state, such that the backrest side wing is coupled with the backrest body and thus can be driven by the backrest body, and when the backrest body is tilted back from the design position by an angle which reaches the predetermined angle threshold, the coupling device is transferred from the coupled state into a decoupled state, such that the backrest body can be separated from the backrest side wing and moved independently; Preferably, the backrest body can be tilted back from the design position up to a maximum of the backrest body being horizontal.

2. The vehicle seat according to claim 1, characterized by The coupling device (10) comprises a control curve (11) and a linkage pin assembly (207) which can be guided by the control curve, one of the backrest body and the backrest side wing being provided with an engagement slot (21), wherein, when the backrest body is tilted back from the design position by an angle which is less than a predetermined angle threshold, the linkage pin assembly is inserted into the engagement slot and held by the engagement slot, the coupling device is in the coupled state, and when the backrest body is tilted back from the design position by an angle which reaches the predetermined angle threshold, the linkage pin assembly is disengaged from the engagement slot, the coupling device is transferred from the coupled state into the decoupled state, preferably the engagement slot (21) is an undercut slot; Preferably, the control curve (11) is configured as a slide groove, or the control curve is configured as a slide channel which guides the linkage pin assembly on one side; Preferably, the backrest body is provided with the engagement slot (21), the linkage pin assembly is inserted into a recess (20) of the backrest side wing (204), further preferably the recess of the backrest side wing (204) and the control curve (11) are orthogonal at the intersection of both; or Preferably, the backrest side wing is provided with the engagement slot (21), the linkage pin assembly (207) is held in connection with the backrest body, directly or indirectly.

3. The vehicle seat according to claim 2, characterized by The coupling device comprises a linkage lever (202) which can be permanently driven by the backrest body (103), the linkage lever and the backrest side wing being rotatable about a common rotation axis; and The linkage lever has the engagement slot (21); or the linkage pin assembly (207) is held in connection with the linkage lever and the backrest side wing is provided with the engagement slot (21); Preferably, the backrest body and the linkage lever are connected in an end region of the linkage lever which is remote from the rotation axis.

4. The vehicle seat according to claim 2, characterized by The coupling device comprises a connecting tab (240) which is fixedly connected with the backrest body (103), the connecting tab having a first section (42) which protrudes from the backrest body and a second section (43) which is bent relative to the first section; and The second section has the engagement slot (21); or the linkage pin assembly (207) is held in connection with the second section and the backrest side wing is provided with the engagement slot (21); Preferably, the backrest body and the linkage lever are connected in an end region of the linkage lever which is remote from the rotation axis. Alternatively, the backrest body (103) is provided with the engagement slot (21) or the linkage pin assembly (207) is directly held in connection with the backrest body and the backrest side wing is provided with the engagement slot (21).

5. The vehicle seat according to any one of claims 1 to 4, characterized by, The vehicle seat comprises a resilient element (209) which is connected with the backrest side wing (204) and which is tensioned when the backrest body is inclined rearward beyond a predetermined angle threshold, such that the backrest side wing is held in its maximum angle position of inclination rearward by the resilient force; Preferably, the vehicle seat comprises a resilient element (209) which is connected with the backrest side wing on the one hand and with the linkage lever on the other hand and which is tensioned when the backrest body is inclined rearward beyond a predetermined angle threshold, such that the backrest side wing is held in its maximum angle position of inclination rearward by the resilient force; or Preferably, the vehicle seat comprises a resilient element (209) which is connected with the backrest side wing on the one hand and with a resilient element suspension point which projects from the base (136) or with the second section on the other hand; or Preferably, the vehicle seat comprises a resilient element (209) which is connected with the backrest side wing on the one hand and with a resilient element suspension point which projects from the base or from the backrest body on the other hand; Preferably, the resilient element is a spring; Further preferably, the spring is a helically wound leaf spring.

6. The vehicle seat according to any one of claims 1 to 5, characterized by The linkage lever (202) and the backrest side wing (204) have a joint stop (24, 31) for defining a maximum angle position of inclination rearward of the backrest body; and / or One end of the control curve (11) forms a stop for defining a maximum angle position of inclination rearward of the backrest side wing.

7. The vehicle seat according to any one of claims 1 to 6, characterized by, Two vehicle seats are integrated in the backrest body and the vehicle seat comprises two backrest side wings which are arranged on both sides of the backrest body, each of which is provided with a mechanical coupling device.

8. The vehicle seat according to any one of claims 1 to 7, characterized by, The backrest body is provided with an angle adjuster and a drive motor (104) which can drive the backrest body by means of the angle adjuster in order to adjust the inclination angle of the backrest body; In a preferred embodiment, the backrest body is provided with an angle adjuster (135) and a drive motor (104) which can drive the backrest body by means of the angle adjuster in order to adjust the inclination angle of the backrest body; In this case, the angle adjuster is an eccentric angle adjuster, the linkage lever has a long hole (23) in the region of its end region which is remote from the axis of rotation, in which a connection element which connects the backrest body with the linkage lever is received and can slide along the long hole; or In another preferred embodiment, the backrest body is provided with an angle adjuster (135) and a drive motor (104) which can drive the backrest body by means of the angle adjuster in order to adjust the inclination angle of the backrest body; in this case, the angle adjuster is a concentric angle adjuster.

9. The vehicle seat according to any one of claims 1 to 8, characterized by, The backrest body is foldable forward from the design position to a predetermined angular position, the coupling device is configured to be in the coupled state when the backrest body is between the design position and the predetermined angular position of the forward fold, such that the backrest wing is coupled with the backrest body and thus the backrest wing can be driven by the backrest body. In a preferred embodiment: The backrest body is foldable forward from the design position to a predetermined angular position, the coupling device is configured to be in the coupled state when the backrest body is between the design position and the predetermined angular position of the forward fold, such that the backrest wing is coupled with the backrest body and thus the backrest wing can be driven by the backrest body; and - the control curve has a circular arc segment in which the linkage pin assembly is guided when the backrest body is folded forward from the design position, such that the linkage pin assembly is held by the engagement slot; or - the linkage pin assembly is disengaged from the control curve when the backrest body is folded forward from the design position and the linkage pin assembly is held by the engagement slot.

10. A motor vehicle, characterized in that The motor vehicle has a vehicle seat according to any one of claims 1 to 9.

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