Vehicle seat with shoulder adjustment device

Abstract

The invention relates to a vehicle seat with a shoulder adjustment device, characterized in that the vehicle seat comprises a backrest frame body, the shoulder adjustment device comprises a shoulder support which is hingedly connected at a hinge point to the backrest frame body, which is configured to be pivotable between a first position and a second position, a drive mechanism which is configured to drive the shoulder support to pivot between the first position and the second position, and a stabilizing mechanism which has a link assembly, the link assembly having a first link and a second link which are arranged crosswise to each other and are hingedly connected to each other at a cross point, the first link being kinematically coupled to the shoulder support and to the backrest frame body, respectively, and the second link being kinematically coupled to the shoulder support and to the backrest frame body, respectively, such that in the first position the first link and the second link have a first link angle and in the second position the first link and the second link have a second link angle which is different from the first link angle.

Description

TECHNICAL FIELD

[0001] The present application relates to a vehicle seat with a shoulder adjustment device. BACKGROUND

[0002] The reclining angle of the seat back of a vehicle seat can be adjusted generally. Some shoulder adjustment devices arranged in the seat back of a vehicle seat are disclosed in the prior art to further realize the adjustment of the shoulder of an occupant on the seat back. However, the existing shoulder adjustment devices of a vehicle seat have certain limitations.

[0003] For example, an existing shoulder adjustment device of a vehicle seat has an adjustment screw rod arranged perpendicularly to the plane of the seat back, and the adjustment stroke thereof is small. If the length of the screw rod is increased, the CAS (Concept A Surface) of the seat back will be exceeded. However, in the lying position of the seat back, the occupant needs a large adjustment stroke of the shoulder if the occupant needs to look straight ahead.

[0004] In addition, the existing shoulder adjustment device of a vehicle seat needs to be installed with a bracket, and the bracket occupies the space in the seat back where a seat belt retractor can be installed, which limits the application of the shoulder adjustment device in an ABTS seat. SUMMARY

[0005] The present application aims at providing a vehicle seat with a shoulder adjustment device, which can at least solve one of the above-mentioned problems.

[0006] In order to achieve the above-mentioned purpose, the present application provides a vehicle seat with a shoulder adjustment device, characterized in that the vehicle seat comprises a seat back frame body, and the shoulder adjustment device comprises:

[0007] a shoulder support member, which is hingedly connected to the seat back frame body at a hinge point, and is configured to be pivotable between a first position and a second position, in the first position, the shoulder support member has a first support angle with the seat back frame body, and in the second position, the shoulder support member has a second support angle different from the first support angle with the seat back frame body;

[0008] a driving mechanism configured to drive the shoulder support member to pivot between the first position and the second position; and

[0009] A stabilizing mechanism having a linkage assembly with a first linkage and a second linkage arranged crosswise to each other and hingedly connected to each other at a cross-over point, wherein the first linkage is kinematically coupled to the shoulder support and the backrest frame body, respectively, and the second linkage is kinematically coupled to the shoulder support and the backrest frame body, respectively, such that in a first position of the shoulder support the first and second linkages have a first linkage angle and in a second position of the shoulder support the first and second linkages have a second linkage angle different from the first linkage angle.

[0010] Advantageously, the stabilizing mechanism has a first mounting bracket arranged on the shoulder support and a second mounting bracket arranged on the backrest frame body, the first mounting bracket having a first bracket runner and the second mounting bracket having a second bracket runner, wherein a first end of the first linkage is hingedly connected on the first mounting bracket and a second end of the first linkage is guided through the second bracket runner of the second mounting bracket, a first end of the second linkage is guided through the first bracket runner of the first mounting bracket and a second end of the second linkage is hingedly connected on the second mounting bracket.

[0011] Advantageously, during pivoting of the shoulder support the first end of the first linkage and the first end of the second linkage are always spaced apart by a distance and the second end of the first linkage and the second end of the second linkage are always spaced apart by a distance. This guarantees an anti-tilting support of the shoulder support in any pivoted position of the shoulder support.

[0012] Advantageously, the first mounting bracket is movably arranged relative to the shoulder support and the second mounting bracket is fixedly arranged relative to the backrest frame body.

[0013] Advantageously, the first mounting bracket is connected to the shoulder support by a bearing assembly having a runner through which the first mounting bracket is guidedly moved relative to the shoulder support during pivoting of the shoulder support.

[0014] Advantageously, the bearing assembly has two guide rods fixed to the shoulder support and two tabs fixed to the guide rods, respectively, the tabs being provided with the runner, the first mounting bracket extending between the two tabs and being guidedly moved relative to the shoulder support during pivoting of the shoulder support through the runner of the two tabs.

[0015] Advantageously, the first mounting bracket has a first face provided with the first bracket runner and the second mounting bracket has a second face provided with the second bracket runner, the first face and the second face being always coplanar during pivoting of the shoulder support.

[0016] Advantageously, the shoulder support has two legs and an intermediate section connecting the two legs, wherein the free ends of the two legs are each hingedly connected to the backrest frame body at a hinge point, and the intermediate section is arranged above the hinge points.

[0017] Advantageously, the stabilizing mechanism is arranged in a substantially central position of the intermediate section of the shoulder support.

[0018] Advantageously, the shoulder support is steplessly adjustable between the first and second positions.

[0019] Advantageously, the drive mechanism has a drive motor and a screw rod which is drivable by the drive motor to move back and forth, the screw rod being hingedly connected at one end to the shoulder support such that the screw rod can drive the shoulder support to pivot when moving.

[0020] Advantageously, the shoulder support can swing the screw rod during pivoting.

[0021] Advantageously, the drive mechanism has an outer housing fixed to the backrest frame body and an inner carrier arranged in the outer housing, the screw rod passing through the inner carrier and the screw rod being able to swing the inner carrier to rotate relative to the outer housing.

[0022] Advantageously, the screw rod is provided with at least one stopper for limiting the moving stroke of the screw rod, the screw rod being movable relative to the inner carrier or the outer housing until the stopper stops against the inner carrier or the outer housing.

[0023] Advantageously, a worm gear transmission is arranged between the drive motor and the screw rod. BRIEF DESCRIPTION OF DRAWINGS

[0024] The application will be explained in more detail below by means of embodiments with reference to the drawings, but the application is not restricted to the embodiments described in the drawings and explained in detail below. The drawings are as follows:

[0025] Figure 1 a perspective view from the front of a vehicle seat back with a shoulder adjustment device according to a first embodiment of the application, wherein the shoulder support of the shoulder adjustment device is in a closed position,

[0026] Figure 2 a perspective view from the front of a vehicle seat back in Figure 1 , wherein the shoulder support of the shoulder adjustment device is in an open position,

[0027] Figure 3a a perspective view showing Figure 1 most of the components of the shoulder adjustment device in

[0028] Figure 3b in perspective view Figure 1 of the backrest frame body in which the shoulder adjustment device is arranged,

[0029] Figure 4 in perspective view Figure 1 of the shoulder adjustment device in

[0030] Figure 5 in perspective view Figure 1 of the vehicle seat backrest in

[0031] Figure 6 in perspective view Figure 1 of the vehicle seat backrest in

[0032] Figure 7 in perspective view Figure 1 of the vehicle seat backrest in

[0033] Figure 8 in perspective view Figure 1 of the vehicle seat backrest in

[0034] Figure 9 in perspective view Figure 1 of the vehicle seat backrest in

[0035] Figure 10 in perspective view Figure 1 of the vehicle seat backrest in

[0036] Figure 11 in perspective view Figure 1 of the front mounting bracket of the stabilizing mechanism of the shoulder adjustment device in

[0037] Figure 12 in perspective view Figure 1 of the rear mounting bracket of the stabilizing mechanism of the shoulder adjustment device in

[0038] Figure 13 in perspective view from the rear of a vehicle seat backrest with a shoulder adjustment device according to a second embodiment of the application, and

[0039] Figure 14 in perspective view Figure 1An exemplary transmission mechanism in which the drive motor of the drive mechanism is driven to the lead screw. Detailed Implementation

[0040] The illustrative embodiments described below are for illustrative purposes only. Various systems, structures, and devices are schematically depicted in the accompanying drawings, but not all features of actual systems, structures, and devices are described. For example, well-known functions or structures are not described in detail to avoid unnecessary detail that could obscure the invention. It should be understood that in any practical application, many specific implementation decisions need to be made to achieve the specific goals of the developer or user, and to comply with system-related and industry-related limitations, which may vary depending on the specific application. Furthermore, it should be understood that while such implementation decisions are complex and time-consuming, they are routine tasks for those skilled in the art who will benefit from this invention.

[0041] The terms and phrases used herein should be understood and interpreted in accordance with the understanding of those skilled in the art. The consistent use of terms or phrases herein is not intended to imply a specific definition, i.e., a definition different from the common and conventional meaning understood by those skilled in the art. For terms or phrases intended to have a specific meaning, i.e., a meaning different from that understood by those skilled in the art, such specific definition will be explicitly listed in the specification, giving the specific definition of the term or phrase directly and unambiguously.

[0042] Unless otherwise required by the content, throughout the following description, the word “including” and its variations, such as “comprising” and “having”, will be interpreted in an open-ended, inclusive sense, that is, as “including but not limited to”.

[0043] Figure 1 and Figure 2 The closed and open states of the shoulder adjustment device 1 for a vehicle seat 100 according to the first embodiment of the present invention are shown respectively.

[0044] See Figure 1 and Figure 2 The shoulder adjustment device 1 includes a shoulder support 2, which is positioned approximately at the shoulder level on the backrest of the vehicle seat 100 and provides support to the shoulders of the seated occupant. The shoulder support 2 can be configured as a U-shaped curved tube, having two legs 30 and a laterally extending intermediate section 31 connecting the two legs 30. The shoulder support 2 is hinged to the backrest frame body 5 of the vehicle seat 100 at a hinge point 6, and is configured to pivot about the hinge point 6, allowing adjustment between a closed and an open position. Figure 1 and Figure 5In the closed position shown, the shoulder support 2 and the backrest frame plane 39 of the backrest frame body 5 have a first support angle α1 (see...). Figure 5 ),exist Figure 2 and Figure 6 In the open position shown, the shoulder support 2 and the backrest frame plane 39 of the backrest frame body 5 have a second support angle α2 (see...). Figure 6 The first support angle α1 and the second support angle α2 are different. "The first support angle α1 and the second support angle α2 are different" means that the degree of pivoting of the shoulder support member 2 toward the occupant's shoulder is different, thereby adjusting the degree of forward tilt of the occupant's shoulder. Here, the first support angle α1 can be, for example, the minimum support angle of the shoulder support member 2, while the second support angle α2 can be, for example, the maximum support angle of the shoulder support member 2.

[0045] In other embodiments, the shoulder support 2 may have other structures, such as a solid rod, a plate, or a grid structure, as long as the shoulder support 2 can be hinged to the backrest frame body 5 and can pivot about the hinge point 6.

[0046] See Figure 3a , Figure 3b and Figure 4 The shoulder adjustment device 1 also includes a drive mechanism 3. The drive mechanism 3 has a drive motor 19, a housing 16, and an inner support 15 disposed in the housing 16. The motor housing of the drive motor 19 is fixed to the inner support 15. The outer contour of the inner support 15 is adapted to the inner contour of the housing 16, so that the inner support 15 together with the drive motor 19 can rotate relative to the housing 16. The housing 16 is fixedly mounted on the backrest frame body 5, specifically on its upper crossbar 50, via a housing bracket 38.

[0047] The drive mechanism 3 also has a lead screw 34, which is supported in the inner support 15 and extends through both the inner support 15 and the outer shell 16. To allow rotation of the inner support 15 relative to the outer shell 16, the outer shell 16 may have a guide groove that allows the lead screw 34 to swing relative to the outer shell 16. One end of the lead screw 34 has a hinge joint 35. The shoulder support 2 has a lead screw connecting bracket 36, which is fixedly connected, for example, welded to the shoulder support 2, specifically at approximately the center of its intermediate section 31. The lead screw 34 is hinged to the lead screw connecting bracket 36 via the hinge joint 35. Therefore, the lead screw 34 is pivotable relative to the lead screw connecting bracket 36 and thus the shoulder support 2. The lead screw 34 may have a first limiting element 27, such as a limiting nut or flange, between the hinge joint 35 and the external thread of the lead screw 34. At the other end of the lead screw 34 opposite the hinge joint 35, the lead screw 34 may also have a second limiting element 28 (see...). Figure 5 andFigure 6 For example, a limiting nut. The first limiting member 27 and the second limiting member 28 can respectively stop the inner bearing 15 or the outer shell 16 at the two end points of the stroke of the lead screw 34.

[0048] The rotation of the drive motor 19 can be converted into the reciprocating movement of the lead screw 34. For this purpose, see [link to relevant documentation]. Figure 14 An exemplary worm gear transmission device 17, having a worm wheel 33 and a worm 32 that cooperate with each other, can be exemplarily arranged between the drive motor 19 and the lead screw 34. These are mounted in the outer casing 16 and supported by an inner support 15. The output shaft of the drive motor 19 is fixedly connected to the worm 32 or constructed as a single piece, allowing the output shaft to drive the worm 32 to rotate. The worm 32 meshes with the worm wheel 33, so that the rotation of the worm 32 drives the rotation of the worm wheel 33. The worm wheel 33 can be hollow and have internal threads on its inner wall. The lead screw 34 can pass through the worm wheel 33 and mesh with its internal threads. Therefore, rotation of the worm wheel 33 in different directions can drive the lead screw 34 to reciprocate. Through the reciprocating movement of the lead screw 34, the lead screw 34 can drive the shoulder support 2 to pivot between a closed position and an open position. At the same time, the pivoting of the shoulder support 2 drives the lead screw 34 to rotate or swing, which in turn drives the inner bearing 15 and the drive motor 19 to rotate relative to the outer shell 16.

[0049] Figure 3a and Figure 3b Most of the components of the shoulder adjustment device 1 and a portion of the backrest frame body 5 are shown. The entire drive mechanism 3 is located below the middle section 31 of the shoulder support 2 and the upper crossbar 50 of the backrest frame body 5. The lead screw 34 is arranged below the center of the middle section 31 of the shoulder support 2 and extends perpendicular to the middle section 31. The housing 16 is arranged below the center of the middle section 31 of the shoulder support 2, and the drive motor 19 extends laterally parallel to the middle section 31 on one side of the housing 16. On the side of the backrest frame body 5 where the drive motor 19 is not located, a seatbelt retractor 37 for the seatbelt can be provided. This allows the vehicle seat 100 to have shoulder adjustment function while also having space for the seatbelt retractor 37. Therefore, the seat belt retractor 37 can be installed on the vehicle seat 100, rather than on, for example, the B-pillar of the vehicle, so that the seat belt can always be extended from the seat belt retractor 37 at the shoulder position of the vehicle seat 100 when the vehicle seat 100 is in a reclining position, instead of extending from, for example, the B-pillar of the vehicle, which is required, for example, in an ABTS seat.

[0050] Now combine Figure 5 and Figure 6 To reiterate the working principle of the drive mechanism 3, when it is necessary to move the shoulder support 2 from... Figure 5 The closed position shown is towardsFigure 6 When pivoting in the open position as shown, the motor's output shaft rotates in one direction, driving the lead screw 34 forward and upward relative to the inner support body 15 and the outer shell 16 via the worm gear 32 and worm wheel 33. This, in turn, drives the shoulder support 2 to pivot from the closed position to the open position. Simultaneously, the forward pivoting of the shoulder support 2 causes the lead screw 34 to rotate counterclockwise (viewed from the drawing direction), which in turn causes the inner support body 15 and the drive motor 19 to rotate counterclockwise relative to the outer shell 16.

[0051] Conversely, when it is necessary to make shoulder support 2 from Figure 6 The opening position shown faces Figure 5 When pivoting in the closed position as shown, the motor's output shaft rotates in the opposite direction, driving the lead screw 34 to move rearward and downward relative to the inner support body 15 and the outer shell 16 via the worm gear 32 and worm wheel 33. This, in turn, drives the shoulder support 2 to pivot from the open position to the closed position. Simultaneously, the rearward pivoting of the shoulder support 2 causes the lead screw 34 to rotate clockwise (viewed from the drawing direction), which in turn causes the inner support body 15 and the drive motor 19 to rotate clockwise relative to the outer shell 16.

[0052] See Figure 5 and Figure 6 It can also be seen that in the closed position of the shoulder support 2, the lead screw 34 has a first lead screw angle γ1 with the backrest frame plane 39 of the backrest frame body 5, and in the open position of the shoulder support 2, the lead screw 34 has a second lead screw angle γ2 with the backrest frame plane 39 of the backrest frame body 5. The first lead screw angle γ1 is smaller than the second lead screw angle γ2. In the closed position, based on the smaller first lead screw angle γ1, the lower end of the lead screw 34 extends rearward from the backrest frame body 5 as little as possible. In the open position, based on the lead screw 34 having moved upward relative to the outer shell 16 as much as possible, the lower end of the lead screw 34 still extends rearward from the backrest frame body 5 as little as possible. This enables the largest possible shoulder adjustment travel despite limitations in backrest thickness.

[0053] See Figure 4 The shoulder adjustment device 1 also includes a stabilizing mechanism 4, which stabilizes the shoulder support 2. The stabilizing mechanism 4 has a linkage assembly 7 having a first link 10 and a second link 20 hinged at an intersection 24 via a hinge axis, such as a rivet 51. The intersection 24 is located at the midpoint of the longitudinal extension of the first link 10 and the second link 20, respectively, and the first link 10 and the second link 20 may have the same length, but this is not mandatory.

[0054] See Figures 7 to 12 The stabilizing mechanism 4 has a front mounting bracket 8 and a rear mounting bracket 9. The front mounting bracket 8 is shown in more detail below.Figure 11 As can be seen, the front mounting bracket 8 can be a one-piece component, such as a stamped part. The front mounting bracket 8 may have a bottom surface 40 and two opposing end surfaces 41, as well as a front surface 42 connecting the bottom surface 40 and the end surfaces 41. The front mounting bracket 8 may have a front bracket groove 21 on the bottom surface 40, which extends laterally along the bottom surface 40, for example, parallel to the backrest frame plane 39. The rear mounting bracket 9 is shown in more detail... Figure 12 As can be seen, the rear mounting bracket 9 can also be a one-piece component, such as a stamped part, and the rear mounting bracket 9 can have a top surface 43 and a rear surface 44. The rear mounting bracket 9 has a rear bracket groove 22 on the top surface 43, which extends laterally along the top surface 43, for example, parallel to the backrest frame plane 39. Therefore, the front bracket groove 21 and the rear bracket groove 22 are arranged parallel to each other. The rear mounting bracket 9 is fixed via the rear surface 44, for example, welded to approximately the center of the upper crossbar 50 of the backrest frame body 5.

[0055] See Figure 7 and Figure 8 The front end of the first link 10 is hinged to the bottom surface 40 of the front mounting bracket 8 via a hinge shaft, such as a rivet 51, and the rear end of the first link 10 is guided in the rear bracket groove 22 of the rear mounting bracket 9 via a guide shaft, such as a rivet 51. The front end of the second link 20 is guided in the front bracket groove 21 of the front mounting bracket 8 via a guide shaft, such as a rivet 51, and the rear end of the second link 20 is hinged to the top surface 43 of the rear mounting bracket 9 via a hinge shaft, such as a rivet 51. Therefore, the front mounting bracket 8 and the rear mounting bracket 9 can be connected to each other, either close to or away from each other, via the link assembly 7.

[0056] See Figure 3a and Figure 4 The stabilizing mechanism 4 may have two front mounting bracket support assemblies 11. Each front mounting bracket support assembly 11 may have, for example, a guide rod 13 for securing the headrest, a guide rod bracket 14, and a tab 29. The guide rod bracket 14 has a semi-enclosed structure surrounding the central section 31 of the shoulder support 2, and may be, for example, a stamped part. The guide rod 13 is fixedly connected, for example, welded to the central region of the central section 31 of the shoulder support 2 by means of the guide rod bracket 14. The tabs 29 each have a generally vertically extending groove 12. See also Figure 3a , Figure 9 and Figure 10The tabs 29 are fixed, for example welded, respectively on the inner side behind the guide rod holder 14, and the sliding grooves 12 of the tabs 29 are offset backwards from the guide rod holder 14. The two end faces 41 of the front mounting bracket 8 can be arranged respectively close to, for example against, the inner side of the two tabs 29, and can be guided in the sliding grooves 12 respectively via guides, for example sliding bolts 23. Each guide passes through the sliding groove 12 of one tab 29 and is fixed on one end face 41 of the front mounting bracket 8.

[0057] With reference to Figure 7 and Figure 8 The bottom face 40 of the front mounting bracket 8 and the top face 43 of the rear mounting bracket 9 as well as the first link 10 and the second link 20 of the linkage assembly 7 are substantially located in the same plane, for example horizontal plane. In the closed position of the shoulder support 2, the first link 10 and the second link 20 have a first link angle β1, and in the open position, the first link 10 and the second link 20 have a second link angle β2. The first link angle β1 is smaller than the second link angle β2.

[0058] The working principle of the stabilizing mechanism 4 will now be explained in detail with reference to Figure 5 and Figure 6 and Figures 7 to 10 When the drive mechanism 3 drives the shoulder support 2 to move from the closed position to the open position, the front end of the first link 10 and the rear end of the second link 20 are respectively pivoted relative to the front mounting bracket 8 and the rear mounting bracket 9, while the rear end of the first link 10 and the front end of the second link 20 are respectively slidingly guided in the rear bracket sliding groove 22 of the rear mounting bracket 9 and the front bracket sliding groove 21 of the front mounting bracket 8, so that the link angle β between the first link 10 and the second link 20 of the linkage assembly 7 gradually increases. At the same time, with reference to Figure 5 and Figure 6 When the shoulder support 2 moves from the closed position to the open position, the middle section 31 of the shoulder support 2 rises in height together with the guide rods 13 and the tabs 29, while the front mounting bracket 8 cannot rise based on the constraint of the linkage assembly, which causes the front mounting bracket 8 to slide in the sliding groove 22 of the tab 29. This can thus always maintain the coplanar positional relationship of the bottom face 40 of the front mounting bracket 8 and the top face 43 of the rear mounting bracket 9.

[0059] When the shoulder support 2 is laterally pressed by the occupant, for example when the occupant turns his body left and right, the support of the shoulder support 2 by the lead screw 34 alone is not sufficient to prevent the shoulder support 2 from tilting, while the stabilizing mechanism 4 or rather the X-shaped linkage assembly thereof can provide good lateral stabilization of the shoulder support 2 to prevent it from tilting.

[0060] In addition to or alternatively to the first and second limit members 27, 28 on the lead screw 34, the two end points of the front and rear bracket slides 21, 22 can also be used to limit the adjustment travel of the shoulder support 2. That is, the positions of the first and second limit members 27, 28 on the lead screw 34 or the distance between them, and the end points of the front and rear bracket slides 21, 22 or the length between them can be used individually or in combination to limit the adjustment travel of the shoulder support 2.

[0061] In the shoulder adjustment device 1 according to the first embodiment of the present application, the drive mechanism 3 is arranged substantially below the intermediate section 31 of the shoulder support 2 and the upper crossbar of the backrest frame body 5, while the stabilizing mechanism 4 is arranged substantially above the intermediate section 31 of the shoulder support 2 and the upper crossbar of the backrest frame body 5. Furthermore, the vehicle seat 100 is provided with a seat belt retractor 37 in the backrest, which can be fixed to the backrest frame body 5, more precisely at a corner position of the backrest frame body 5.

[0062] In the shoulder adjustment device 1 according to the second embodiment of the present application, the drive mechanism 3 is arranged substantially below the intermediate section 31 of the shoulder support 2 and the upper crossbar of the backrest frame body 5, while the stabilizing mechanism 4 is arranged substantially above the intermediate section 31 of the shoulder support 2 and the upper crossbar of the backrest frame body 5. Furthermore, the vehicle seat 100 is provided with a seat belt retractor 37 in the backrest, which can be fixed to the backrest frame body 5, more precisely at a corner position of the backrest frame body 5. Figure 13 In the shoulder adjustment device 1 according to the second embodiment of the present application, the drive mechanism 3 is arranged substantially below the intermediate section 31 of the shoulder support 2 and the upper crossbar of the backrest frame body 5, while the stabilizing mechanism 4 is arranged substantially above the intermediate section 31 of the shoulder support 2 and the upper crossbar of the backrest frame body 5. Furthermore, the vehicle seat 100 is provided with a seat belt retractor 37 in the backrest, which can be fixed to the backrest frame body 5, more precisely at a corner position of the backrest frame body 5.

[0063] Therefore, the main technical effects that can be achieved by the shoulder adjustment device 1 according to different embodiments of the present application include, for example:

[0064] 1) The shoulder adjustment device 1 can be applied not only to the vehicle seat 100 with the seat belt retractor 37 arranged in the backrest, but also to the vehicle seat 100 without the seat belt retractor 37 arranged in the backrest. Thus, the former vehicle seat 100 is provided with space for arranging the seat belt retractor 37 while having the shoulder adjustment function.

[0065] 2) The lead screw 34 can not only move in translation relative to the outer housing 16, but also move in rotation or oscillation, which can achieve a larger shoulder adjustment travel under the same backrest thickness limitation.

[0066] 3) The "X" shaped arrangement of the first link 10 and the second link 20 of the linkage assembly 7 enables lateral support to the shoulder support 2 to prevent it from tilting sideways under load.

[0067] Finally, it is pointed out that the above described embodiments are only intended to be understood and interpreted, and not to limit the scope of protection of the present application. Modifications can be made to the above described embodiments by those skilled in the art, without departing from the scope of protection of the present application.

Claims

1. A vehicle seat (100) having a shoulder adjustment device (1), characterized in that, The vehicle seat (100) includes a backrest frame body (5), and the shoulder adjustment device (1) includes: A shoulder support (2) is hinged to the backrest frame body (5) at a hinge point (6). The shoulder support (2) is configured to pivot between a first position and a second position. In the first position, the shoulder support (2) has a first support angle (α1) with the backrest frame body (5). In the second position, the shoulder support (2) has a second support angle (α2) with the backrest frame body (5) that is different from the first support angle (α1). Drive mechanism (3), said drive mechanism (3) being configured to drive the shoulder support (2) to pivot between a first position and a second position; and A stabilizing mechanism (4) has a linkage assembly (7) having a first link (10) and a second link (20) arranged crosswise and hinged to each other at the intersection point (24). The first link (10) is kinetically coupled to the shoulder support (2) and the backrest frame body (5), and the second link (20) is kinetically coupled to the shoulder support (2) and the backrest frame body (5), such that in a first position of the shoulder support (2), the first link (10) and the second link (20) have a first link angle (β1), and in a second position of the shoulder support (2), the first link (10) and the second link (20) have a second link angle (β2) different from the first link angle (β1).

2. The vehicle seat (100) according to claim 1, characterized in that, The stabilizing mechanism (4) has a first mounting bracket (8) disposed on the shoulder support (2) and a second mounting bracket (9) disposed on the backrest frame body (5). The first mounting bracket (8) has a first bracket groove (21), and the second mounting bracket (9) has a second bracket groove (22). The first end of the first connecting rod (10) is hinged to the first mounting bracket (8), and the second end of the first connecting rod (10) is guided through the second bracket groove (22) of the second mounting bracket (9). The first end of the second connecting rod (20) is guided through the first bracket groove (21) of the first mounting bracket (8), and the second end of the second connecting rod (20) is hinged to the second mounting bracket (9).

3. The vehicle seat (100) according to claim 2, characterized in that, During the pivoting of the shoulder support (2), the first end of the first link (10) and the first end of the second link (20) are always spaced apart, and the second end of the first link (10) and the second end of the second link (20) are always spaced apart.

4. The vehicle seat (100) according to claim 2, characterized in that, The first mounting bracket (8) is movably disposed relative to the shoulder support (2), and the second mounting bracket (9) is fixedly disposed relative to the backrest frame body (5).

5. The vehicle seat (100) according to claim 4, characterized in that, The first mounting bracket (8) is connected to the shoulder support (2) via a support assembly (11) having a groove (12) during pivoting of the shoulder support (2), the first mounting bracket (8) moving in a guided manner relative to the shoulder support (2) via the groove (12).

6. The vehicle seat (100) according to claim 5, characterized in that, The support assembly (11) has two guide rods (13) fixed to the shoulder support (2) and two tabs (29) respectively fixed to the guide rods (13), the tabs (29) being provided with the grooves (12), the first mounting bracket (8) extending between the two tabs (29) and moving relative to the shoulder support (2) guided by the grooves (12) of the two tabs (29) during pivoting of the shoulder support (2).

7. The vehicle seat (100) according to claim 2, characterized in that, The first mounting bracket (8) has a first surface (40) with a first bracket groove (21) and the second mounting bracket (9) has a second surface (43) with a second bracket groove (22). During the pivoting of the shoulder support (2), the first surface (40) and the second surface (43) are always coplanar.

8. The vehicle seat (100) according to claim 1, characterized in that, The shoulder support (2) has two legs (30) and a middle section (31) connecting the two legs (30), wherein the free ends of the two legs (30) are respectively hinged to the backrest frame body (5) at the hinge point (6), and the middle section (31) is located above the hinge point (6).

9. The vehicle seat (100) according to claim 8, characterized in that, The stabilizing mechanism (4) is located approximately at the center of the middle section (31) of the shoulder support (2).

10. The vehicle seat (100) according to claim 1, characterized in that, The shoulder support (2) is steplessly adjustable between the first position and the second position.

11. The vehicle seat (100) according to claim 1, characterized in that, The drive mechanism (3) has a drive motor (19) and a lead screw (34) that can be driven by the drive motor (19) to reciprocate. The lead screw (34) is hinged at one end to the shoulder support (2) so that the lead screw (34) can drive the shoulder support (2) to pivot when moving.

12. The vehicle seat (100) according to claim 11, characterized in that, The shoulder support (2) can drive the lead screw (34) to swing during pivoting.

13. The vehicle seat (100) according to claim 12, characterized in that, The drive mechanism (3) has an outer shell (16) fixed on the backrest frame body (5) and an inner support body (15) disposed in the outer shell (16). The lead screw (34) passes through the inner support body (15) and the swing of the lead screw (34) can drive the inner support body (15) to rotate relative to the outer shell (16).

14. The vehicle seat (100) according to claim 13, characterized in that, The lead screw (34) is provided with at least one limiting member (27, 28) for limiting the travel of the lead screw (34), the lead screw (34) being able to move relative to the inner support (15) or the outer shell (16) until the limiting member (27, 28) stops on the inner support (15) or the outer shell (16).

15. The vehicle seat (100) according to claim 11, characterized in that, A worm gear transmission device (17) is provided between the drive motor (19) and the lead screw (34).

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