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 comprising: a shoulder support which is hinged to the backrest frame body at a hinge point and which is configured to be pivotable between a first position and a second position; a drive mechanism configured to drive the shoulder support to pivot between a first position and a second position; and a stabilizing mechanism having a link assembly having a first link and a second link, which are arranged intersecting each other and are hinged to each other at the intersection, the first link being kinematically coupled to the shoulder support and the backrest frame body, respectively, and the second link being kinematically coupled to the shoulder support and the backrest frame body, respectively, the first link and the second link have a first link angle in the first position, and the first link and the second link have a second link angle different from the first link angle in the second position.

Description

Technical Field

[0001] The invention relates to a vehicle seat with a shoulder adjustment device. Background Art

[0002] The inclination angle of the seat back of a vehicle seat is usually adjustable. The prior art discloses some shoulder adjustment devices arranged in the back of the vehicle seat to further adjust the shoulders of the occupant on the seat back. However, the existing shoulder adjustment devices for vehicle seats have certain limitations.

[0003] For example, an existing vehicle seat shoulder adjustment device has an adjustment screw rod arranged perpendicular to the plane of the seat back, and its adjustment stroke is small. If the length of the screw rod is increased, it will exceed the seat back CAS (Concept A Surface) limit. However, if the occupant needs to look straight ahead when the seat back is in a reclining position, a large adjustment stroke is required for the occupant's shoulders.

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

[0005] The object of the present invention is to provide 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 object, the present invention provides a vehicle seat with a shoulder adjustment device, characterized in that the vehicle seat includes a backrest frame body, and the shoulder adjustment device includes:

[0007] a shoulder support member, the shoulder support member being hingedly connected to the backrest frame body at a hinge point, the shoulder support member being configured to be pivotable between a first position and a second position, wherein in the first position, the shoulder support member and the backrest frame body have a first support angle, and in the second position, the shoulder support member and the backrest frame body have a second support angle different from the first support angle;

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

[0009] A stabilizing mechanism, the stabilizing mechanism having a link assembly, the link assembly having a first link and a second link, the first link and the second link being arranged crosswise with each other and hingedly connected to each other at the intersection, wherein the first link is movably coupled to the shoulder support and the back frame body, respectively, and the second link is movably coupled to the shoulder support and the back frame body, respectively, so that in a first position of the shoulder support, the first link and the second link have a first link angle, and in a second position of the shoulder support, the first link and the second link have a second link angle different from the first link angle.

[0010] Advantageously, the stabilization mechanism comprises a first mounting bracket arranged on the shoulder support member and a second mounting bracket arranged on the backrest frame body, the first mounting bracket having a first bracket slide groove, and the second mounting bracket having a second bracket slide groove, wherein the first end of the first connecting rod is hingedly connected to the first mounting bracket and the second end of the first connecting rod is guided by the second bracket slide groove of the second mounting bracket, and the first end of the second connecting rod is guided by the first bracket slide groove of the first mounting bracket and the second end of the second connecting rod is hingedly connected to the second mounting bracket.

[0011] Advantageously, during the pivoting of the shoulder support, the first end of the first link and the first end of the second link are always spaced apart, and the second end of the first link and the second end of the second link are always spaced apart, so as to ensure that the shoulder support can be supported against rollover in any pivoting 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 slide slot, and during the pivoting of the shoulder support, the first mounting bracket is guided by the slide slot to move relative to the shoulder support.

[0014] Advantageously, the support assembly comprises two guide rods fixed to the shoulder support and two tabs respectively fixed to the guide rods, the tabs being provided with the slide grooves, the first mounting bracket extending between the two tabs and moving relative to the shoulder support during the pivoting of the shoulder support guided by the slide grooves of the two tabs.

[0015] Advantageously, the first mounting bracket has a first surface provided with a first bracket sliding groove, and the second mounting bracket has a second surface provided with a second bracket sliding groove, and during the pivoting of the shoulder support, the first surface and the second surface are always coplanar.

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

[0017] Advantageously, the stabilizing mechanism is arranged substantially centrally in the middle section of the shoulder support.

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

[0019] Advantageously, the drive mechanism comprises a drive motor and a lead screw which can be driven by the drive motor to move back and forth, wherein one end of the lead screw is hingedly connected to the shoulder support member, so that the lead screw can drive the shoulder support member to pivot when moving.

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

[0021] Advantageously, the driving mechanism comprises an outer shell fixed on the backrest frame body and an inner carrier arranged in the outer shell, the screw rod passes through the inner carrier and the swing of the screw rod can drive the inner carrier to rotate relative to the outer shell.

[0022] Advantageously, the threaded rod is provided with at least one stopper for limiting the movement stroke of the threaded rod, and the threaded rod can be moved relative to the inner carrier or the outer shell until the stopper stops on the inner carrier or the outer shell.

[0023] Advantageously, a worm gear is provided between the drive motor and the spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be explained in more detail below with the aid of embodiments with reference to the accompanying drawings, but the present invention is not limited to the embodiments described in the drawings and described in detail below. The accompanying drawings are as follows:

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

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

[0027] Figure 3a Shown in stereogram Figure 1 Most of the components of the shoulder adjustment device in

[0028] Figure 3b Shown in stereogram Figure 1 The backrest frame body in which the shoulder adjustment device is arranged,

[0029] Figure 4 Show Figure 1 Exploded view of the shoulder adjustment mechanism in

[0030] Figure 5 Show Figure 1 A side view of a vehicle seat backrest in FIG. 1 , wherein the shoulder support of the shoulder adjustment device is in the closed position,

[0031] Figure 6 Show Figure 1 A side view of a vehicle seat backrest in FIG. 1 , wherein the shoulder support of the shoulder adjustment device is in the open position,

[0032] Figure 7 Show Figure 1 A top view of a vehicle seat backrest in FIG. 1 , wherein the shoulder support of the shoulder adjustment device is in the closed position,

[0033] Figure 8 Show Figure 1 A top view of a vehicle seat backrest in FIG. 1 , wherein the shoulder support of the shoulder adjustment device is in the open position,

[0034] Fig. 9 Show Figure 1 A perspective view of a vehicle seat backrest from the rear, wherein the shoulder support of the shoulder adjustment device is in the closed position,

[0035] Fig.10 Show Figure 1 A perspective view of a vehicle seat backrest from the rear, wherein the shoulder support of the shoulder adjustment device is in the open position,

[0036] Fig.11 Show Figure 1 A perspective view of the front mounting bracket of the stabilizing mechanism of the shoulder adjustment device in FIG.

[0037] Fig.12 Show Figure 1 A perspective view of the rear mounting bracket of the stabilizing mechanism of the shoulder adjustment device in FIG.

[0038] Fig.13 A perspective view from the rear showing a vehicle seat back with a shoulder adjustment device according to a second embodiment of the invention, and

[0039] Fig.14 Schematically shown Figure 1An exemplary transmission mechanism from a drive motor to a lead screw in a drive mechanism. DETAILED DESCRIPTION

[0040] Illustrative embodiments described below. In this specification, for the sake of explanation only, various systems, structures and devices are schematically depicted in the accompanying drawings, but all features of the actual systems, structures and devices are not described, such as well-known functions or structures are not described in detail, so as to avoid unnecessary details that make the present invention unclear. Of course, 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 system-related and industry-related restrictions need to be followed, and these specific goals may vary from one practical application to another. In addition, it should be understood that such specific implementation decisions, although complex and time-consuming, are routine tasks for ordinary technicians in the field who benefit from the present invention.

[0041] The terms and phrases used herein should be understood and interpreted as having a meaning consistent with the understanding of such terms and phrases by those skilled in the relevant art. Consistent usage of a term or phrase herein is not intended to imply a special definition of the term or phrase, i.e., a definition that is different from the ordinary and customary meaning as understood by those skilled in the art. For terms or phrases that are intended to have a special meaning, i.e., a meaning that is different from that understood by those skilled in the art, such special definition will be explicitly listed in the specification as a definition, directly and unambiguously giving the special definition of the term or phrase.

[0042] Unless required by the context, throughout the following specification, the word "include" and variations such as "comprising" and "having" are to be interpreted in an open, inclusive sense, that is, such as "including but not limited to".

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

[0044] See also Figure 1 and Figure 2 The shoulder adjustment device 1 includes a shoulder support 2, which is arranged at a substantial shoulder position on the backrest of the vehicle seat 100 and is capable of supporting the shoulders of the seated occupant. The shoulder support 2 may be configured as a curved tube having a U-shape, and the curved tube may have two legs 30 and a transversely extending middle section 31 connecting the two legs 30. The shoulder support 2 is hingedly connected to the backrest frame body 5 of the vehicle seat 100 at a hinge point 6, and the shoulder support 2 is configured to be pivotable about the hinge point 6 so that the shoulder support 2 can be adjusted between a closed position and an open position. Figure 1 and Figure 5In the closed position shown, the shoulder support 2 has a first support angle α1 with the backrest frame plane 39 of the backrest frame body 5 (see Figure 5 ),exist Figure 2 and Figure 6 In the open position shown, the shoulder support 2 has a second support angle α2 with the backrest frame plane 39 of the backrest frame body 5 (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 pivoting degree of the shoulder support 2 toward the shoulder of the occupant is different, so as to adjust the forward tilt degree of the shoulder of the occupant. Here, the first support angle α1 can be, for example, the minimum support angle of the shoulder support 2, and the second support angle α2 can be, for example, the maximum support angle of the shoulder support 2.

[0045] In other embodiments, the shoulder support 2 may also have other structures. For example, the shoulder support 2 may have a solid rod-like, plate-like or grid-like structure, as long as the shoulder support 2 can be hingedly connected to the backrest frame body 5 and can pivot around the hinge point 6.

[0046] See also Figure 3a , Figure 3b and Figure 4 The shoulder adjustment device 1 further comprises a driving mechanism 3. The driving mechanism 3 comprises a driving motor 19, an outer shell 16 and an inner carrier 15 arranged in the outer shell 16. The motor housing of the driving motor 19 is fixed to the inner carrier 15. The outer contour of the inner carrier 15 is adapted to the inner contour of the outer shell 16, so that the inner carrier 15 together with the driving motor 19 can rotate relative to the outer shell 16. The outer shell 16 is fixedly mounted on the backrest frame body 5, specifically on the upper cross bar 50 thereof, via an outer shell bracket 38.

[0047] The drive mechanism 3 also has a screw 34, which is supported in the inner carrier 15 and extends through the inner carrier 15 and the outer shell 16 at the same time. In order to allow the inner carrier 15 to rotate relative to the outer shell 16, a guide groove that allows the screw 34 to swing relative to the outer shell 16 can be provided on the outer shell 16. One end of the screw 34 has a hinge head 35. The shoulder support 2 has a screw connection bracket 36, which is fixedly connected, for example, welded to the shoulder support 2, specifically at a roughly central position of its middle section 31. The screw 34 is hingedly connected to the screw connection bracket 36 via the hinge head 35. Therefore, the screw 34 can pivot relative to the screw connection bracket 36 and thus the shoulder support 2. The screw 34 can have a first stop member 27, such as a stop nut or a flange, between the hinge head 35 and the external thread of the screw 34. At the other end of the screw 34 opposite to the hinge head 35, the screw 34 can also have a second stop member 28 (see Figure 5 and Figure 6 The first limiting member 27 and the second limiting member 28 can be stopped on the inner carrier 15 or the outer shell 16 at the two travel end points of the screw rod 34 respectively.

[0048] The rotation of the drive motor 19 can be converted into the reciprocating movement of the screw rod 34. For this purpose, see Fig.14 , a worm gear 17 can be arranged between the drive motor 19 and the screw 34, which has a worm wheel 33 and a worm 32 that cooperate with each other, and which can be supported by the inner carrier 15 and arranged in the outer housing 16. The output shaft of the drive motor 19 is fixedly connected to the worm 32 or is configured as a single piece, so that the output shaft can drive the worm 32 to rotate. The worm 32 and the worm wheel 33 mesh with each other, so that the rotation of the worm 32 can drive the worm wheel 33 to rotate. The worm wheel 33 can be hollow and an internal thread can be provided on its inner wall, and the screw 34 can pass through the worm wheel 33 and mesh with the internal thread of the worm wheel 33. Therefore, the rotation of the worm wheel 33 in different directions can drive the screw 34 to reciprocate. Through the reciprocating movement of the screw 34, the screw 34 can drive the shoulder support 2 to pivot between the closed position and the open position. At the same time, the pivoting of the shoulder support 2 drives the screw 34 to rotate or swing, thereby driving the inner carrier 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 part of the backrest frame body 5 are shown respectively. 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 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 outer shell 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 outer shell 16. A seat belt retractor 37 for a seat belt can be provided on the side of the backrest frame body 5 where the drive motor 19 is not provided. This makes it possible for the vehicle seat 100 to have a shoulder adjustment function while also having space for providing a seat belt retractor 37. Therefore, the seat belt retractor 37 can be arranged on the vehicle seat 100, and does not have to be arranged on, for example, the B-pillar of the vehicle, so that the seat belt can always be led out 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 being led out from, for example, the B-pillar of the vehicle, which is required, for example, in ABTS seats.

[0050] Now combine Figure 5 and Figure 6 The working principle of the driving mechanism 3 is described again. Figure 5 The closed position shown is towards Figure 6 When the open position shown is pivoted, the output shaft of the motor rotates in one direction, and drives the screw 34 to move forward and upward relative to the inner carrier 15 and the outer shell 16 via the worm 32 and the worm wheel 33, and then the screw 34 drives the shoulder support 2 to pivot from the closed position to the open position. At the same time, the forward pivoting of the shoulder support 2 drives the screw 34 to rotate counterclockwise (from the direction of the drawing), and then drives the inner carrier 15 and the drive motor 19 to rotate counterclockwise relative to the outer shell 16.

[0051] On the contrary, when it is necessary to make the shoulder support member 2 Figure 6 The open position shown is towards Figure 5 When the closed position shown is pivoted, the output shaft of the motor rotates in the other direction, and drives the screw 34 to move backward and downward relative to the inner carrier 15 and the outer shell 16 via the worm 32 and the worm wheel 33, and then the screw 34 drives the shoulder support 2 to pivot from the open position to the closed position. At the same time, the rearward pivoting of the shoulder support 2 drives the screw 34 to rotate clockwise (as viewed from the drawing direction), thereby driving the inner carrier 15 and the drive motor 19 to rotate clockwise relative to the outer shell 16.

[0052] See also Figure 5 and Figure 6 It can also be seen that in the closed position of the shoulder support 2, the screw rod 34 has a first screw angle γ1 with the back frame plane 39 of the back frame body 5, and in the open position of the shoulder support 2, the screw rod 34 has a second screw angle γ2 with the back frame plane 39 of the back frame body 5. Among them, the first screw angle γ1 is smaller than the second screw angle γ2. In the closed position, based on the smaller first screw angle γ1, the lower end of the screw rod 34 extends as little as possible backward from the back frame body 5. In the open position, based on the fact that the screw rod 34 has been moved upward as much as possible relative to the outer shell 16, the lower end of the screw rod 34 still extends as little as possible backward from the back frame body 5. This can achieve the largest possible shoulder adjustment stroke when the backrest thickness is limited.

[0053] See also Figure 4 The shoulder adjustment device 1 further comprises a stabilizing mechanism 4, which is capable of stabilizing the shoulder support 2. The stabilizing mechanism 4 has a link assembly 7, which has a first link 10 and a second link 20 that are articulated at an intersection 24 via an articulation axis, such as a rivet 51. The intersection 24 is located in the middle 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 can have the same length, but this is not mandatory.

[0054] See also Figures 7 to 12 , the stabilizing mechanism 4 has a front mounting bracket 8 and a rear mounting bracket 9. In the more detailed diagram of the front mounting bracket 8 Fig.11 As can be seen in the figure, the front mounting bracket 8 can be an integral component, such as a stamped part. The front mounting bracket 8 can have a bottom surface 40 and two opposite end surfaces 41 and a front surface 42 connecting the bottom surface 40 and the end surface 41. The front mounting bracket 8 can have a front bracket slide groove 21 on the bottom surface 40, and the front bracket slide groove 21 extends in the lateral direction of the bottom surface 40, for example, parallel to the backrest frame plane 39. Fig.12 As can be seen in the figure, the rear mounting bracket 9 can also be an integral 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 slide 22 on the top surface 43, and the rear bracket slide 22 extends in the lateral direction of the top surface 43, for example, parallel to the backrest frame plane 39. Therefore, the front bracket slide 21 and the rear bracket slide 22 are arranged parallel to each other. The rear mounting bracket 9 is fixed, for example, welded, to the approximate center of the upper crossbar 50 of the backrest frame body 5 via the rear surface 44.

[0055] See also Figure 7 and Figure 8 The front end of the first link 10 is hingedly connected 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 slot 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 slot 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 hingedly connected 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 away from or close to each other via the link assembly 7.

[0056] See also Figure 3a and Figure 4 , the stabilizing mechanism 4 can have two front mounting bracket support assemblies 11. The front mounting bracket support assemblies 11 can each have a guide rod 13, a guide rod bracket 14, and a tab 29, which can be used to fix the headrest, for example. The guide rod bracket 14 has a semi-enclosed structure surrounding the middle section 31 of the shoulder support 2, which can be, for example, a stamped part. The guide rod 13 is fixedly connected to the central area of ​​the middle section 31 of the shoulder support 2 by means of the guide rod bracket 14, for example, welded. The tabs 29 each have a substantially vertically extending slide groove 12. See Figure 3a , Fig. 9 and Fig.10The tabs 29 are respectively fixed, for example, welded, to the inner rear of the guide rod bracket 14, and the slide groove 12 of the tab 29 is offset from the guide rod bracket 14 to the rear. The two end faces 41 of the front mounting bracket 8 can be respectively arranged close to, for example, close to, the inner sides of the two tabs 29, and can be respectively guided in the slide groove 12 via guides, for example, sliding bolts 23. Each guide passes through the slide groove 12 of a tab 29 and is fixed to an end face 41 of the front mounting bracket 8.

[0057] See also Figure 7 and Figure 8 , the bottom surface 40 of the front mounting bracket 8 and the top surface 43 of the rear mounting bracket 9 and the first link 10 and the second link 20 of the linkage assembly 7 are substantially located in the same plane, such as a 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] Now combine Figure 5 and Figure 6 as well as Figures 7 to 10 The working principle of the stabilizing mechanism 4 is described in detail. When the driving 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 pivot relative to the front mounting bracket 8 and the rear mounting bracket 9, respectively, and the rear end of the first link 10 and the front end of the second link 20 slide and guide in the rear bracket slide groove 22 of the rear mounting bracket 9 and the front bracket slide groove 21 of the front mounting bracket 8, respectively, so that the link angle β between the first link 10 and the second link 20 of the link assembly 7 gradually increases. At the same time, see 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, together with the guide rod 13 and the tab 29, rises in height, while the front mounting bracket 8 cannot rise due to the constraint of the link assembly, which enables the front mounting bracket 8 to slide in the slide groove 22 of the tab 29. Therefore, this can always maintain the coplanar positional relationship between the bottom surface 40 of the front mounting bracket 8 and the top surface 43 of the rear mounting bracket 9.

[0059] When the shoulder support 2 is squeezed laterally by the occupant at any position thereof, for example, when the occupant turns his body left or right, the support of the shoulder support 2 by the screw rod 34 itself is not sufficient to prevent the shoulder support 2 from tilting, while the stabilizing mechanism 4 or its X-shaped connecting rod assembly can play a good role in lateral stabilization of the shoulder support 2 and prevent it from tilting.

[0060] The first stopper 27 and the second stopper 28, which are additional or alternative to the screw rod 34, and the two end points of the front bracket slide slot 21 and the rear bracket slide slot 22, respectively, can also be used to limit the adjustment stroke of the shoulder support member 2. In other words, the position of the first stopper 27 and the second stopper 28 on the screw rod 34 or the distance therebetween, and the end points of the front bracket slide slot 21 and the rear bracket slide slot 22 or the length therebetween can be used alone or in combination to limit the adjustment stroke of the shoulder support member 2.

[0061] In the shoulder adjustment device 1 according to the first embodiment of the present invention, the drive mechanism 3 is arranged substantially below the middle section 31 of the shoulder support 2 and the upper crossbar of the backrest frame body 5, and the stabilization mechanism 4 is arranged substantially above the middle section 31 of the shoulder support 2 and the upper crossbar of the backrest frame body 5. In addition, 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] exist Fig.13 , a shoulder adjustment device 1 according to a second embodiment of the present invention is shown. In this second embodiment, there is no need to arrange the seat belt retractor 37 in the vehicle seat 100. In contrast, the drive mechanism 3 can be arranged at the position where the seat belt retractor 37 was originally arranged according to the first embodiment of the present invention. The stabilizing mechanism 4 can be arranged inverted compared to the first embodiment, for example, arranged in a mirror-symmetrical manner with respect to a horizontal plane. Therefore, according to the second embodiment of the present invention, the drive mechanism 3 and the stabilizing mechanism 4 are basically arranged side by side on the backrest frame body 5, and are mostly arranged below the middle section 31 of the shoulder support 2 and the upper crossbar of the backrest frame body 5. This can make the arrangement of the components on the backrest frame body 5 more compact, and also reduce the interference of the stabilizing mechanism 4 with the covering of the upper part of the seat back.

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

[0064] 1) The shoulder adjustment device 1 can be applied not only to a vehicle seat 100 in which a seat belt retractor 37 is arranged on the backrest, but also to a vehicle seat 100 in which a seat belt retractor 37 is not arranged on the backrest. Therefore, the vehicle seat 100 in which the former is realized has a space for arranging the seat belt retractor 37 while having a shoulder adjustment function.

[0065] 2) The screw rod 34 can not only move relative to the outer shell 16 but also rotate or swing, so that a larger shoulder adjustment stroke can be achieved under the same backrest thickness limit.

[0066] 3) The “X”-shaped arrangement structure of the first link 10 and the second link 20 of the link assembly 7 can provide stable lateral support for the shoulder support member 2 and prevent it from tilting due to force.

[0067] Finally, it should be pointed out that the above embodiments are only used to understand and explain the present invention, and do not limit the protection scope of the present invention. For those skilled in the art, modifications can be made based on the above embodiments, and all these modifications do not depart from the protection scope of the present invention.

Claims

1. A vehicle seat (100) having a shoulder adjustment device (1), characterized in that: The vehicle seat (100) comprises a backrest frame body (5), and the shoulder adjustment device (1) comprises: A shoulder support member (2), the shoulder support member (2) being hingedly connected to the backrest frame body (5) at a hinge point (6), the shoulder support member (2) being configured to be pivotable between a first position and a second position, wherein in the first position, the shoulder support member (2) and the backrest frame body (5) have a first support angle (α1), and in the second position, the shoulder support member (2) and the backrest frame body (5) have a second support angle (α2) different from the first support angle (α1); a driving mechanism (3), the driving 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), the stabilizing mechanism (4) having a link assembly (7), the link assembly (7) having a first link (10) and a second link (20), the first link (10) and the second link (20) being arranged crosswise with each other and being hingedly connected to each other at an intersection (24), wherein the first link (10) is movably coupled to the shoulder support (2) and the backrest frame body (5), respectively, and the second link (20) is movably coupled to the shoulder support (2) and the backrest frame body (5), respectively, so 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) comprises a first mounting bracket (8) arranged on the shoulder support member (2) and a second mounting bracket (9) arranged on the backrest frame body (5), the first mounting bracket (8) having a first bracket slide groove (21), and the second mounting bracket (9) having a second bracket slide groove (22), wherein the first end of the first connecting rod (10) is hingedly connected to the first mounting bracket (8) and the second end of the first connecting rod (10) is guided by the second bracket slide groove (22) of the second mounting bracket (9), and the first end of the second connecting rod (20) is guided by the first bracket slide groove (21) of the first mounting bracket (8) and the second end of the second connecting rod (20) is hingedly connected to the second mounting bracket (9).

3. The vehicle seat (100) according to claim 1 or 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 any one of claims 1 to 3, characterized in that: The first mounting bracket (8) is movably arranged relative to the shoulder support (2), and the second mounting bracket (9) is fixedly arranged relative to the backrest frame body (5), and / or the first mounting bracket (8) is connected to the shoulder support (2) via a support assembly (11), the support assembly (11) having a slide groove (12), during the pivoting of the shoulder support (2), the first mounting bracket (8) is guided by the slide groove (12) to move relative to the shoulder support (2), and / or 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) are provided with the slide groove (12), the first mounting bracket (8) extends between the two tabs (29) and during the pivoting of the shoulder support (2), it is guided by the slide grooves (12) of the two tabs (29) to move relative to the shoulder support (2).

5. The vehicle seat (100) according to any one of claims 1 to 4, characterized in that: The first mounting bracket (8) has a first surface (40) on which a first bracket slide groove (21) is arranged, and the second mounting bracket (9) has a second surface (43) on which a second bracket slide groove (22) is arranged, and during the pivoting of the shoulder support member (2), the first surface (40) and the second surface (43) are always coplanar.

6. The vehicle seat (100) according to any one of claims 1 to 5, characterized in that The shoulder support member (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 hingedly connected to the backrest frame body (5) at hinge points (6), the middle section (31) is arranged above the hinge point (6), and / or the stabilizing mechanism (4) is arranged at a substantially central position of the middle section (31) of the shoulder support member (2).

7. The vehicle seat (100) according to any one of claims 1 to 6, characterized in that The shoulder support (2) is steplessly adjustable between the first position and the second position.

8. The vehicle seat (100) according to any one of claims 1 to 7, characterized in that The drive mechanism (3) comprises a drive motor (19) and a screw rod (34) that can be driven by the drive motor (19) to move back and forth, the screw rod (34) being hingedly connected to the shoulder support member (2) at one end thereof, so that the screw rod (34) can drive the shoulder support member (2) to pivot when moving, and / or the shoulder support member (2) can drive the screw rod (34) to swing during pivoting, and / or the drive mechanism (3) comprises an outer shell (16) fixed to a backrest frame body (5) and an inner carrier (15) arranged in the outer shell (16), the screw rod (34) passes through the inner carrier (15), and the swinging of the screw rod (34) can drive the inner carrier (15) to rotate relative to the outer shell (16).

9. The vehicle seat (100) according to any one of claims 1 to 8, characterized in that The screw rod (34) is provided with at least one limiting member (27, 28) for limiting the movement stroke of the screw rod (34); the screw rod (34) can be moved relative to the inner carrier (15) or the outer shell (16) until the limiting member (27, 28) stops on the inner carrier (15) or the outer shell (16).

10. The vehicle seat (100) according to any one of claims 1 to 9, characterized in that A worm gear transmission device (17) is provided between the drive motor (19) and the screw rod (34).

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