VEHICLE SEAT

Abstract

Vehicle seat (10), in particular motor vehicle seat, with a backrest (30) and a seat section (50), the vehicle seat (10) being connectable to a vehicle structure (S), wherein the seat section (50) is adjustable in a longitudinal direction (x) relative to the vehicle structure (S) by means of a kinematic assembly (100), wherein the kinematic assembly (100) comprises a five-link linkage (I, II, III, IV, V, 110, 120, 130), wherein the five-link linkage (I, II, III, IV, V, 110, 120, 130) comprises two cross-arranged rocker arms (110, 120) which are rotationally connected to a linkage (130) and a frame, wherein the kinematic assembly (100) comprises a further linkage (VI, VII, 140), characterized in that the further linkage (VI, VII, 140) has exactly one support rocker arm (140).

Description

[0001] The invention relates to a vehicle seat, in particular a motor vehicle seat, with a backrest and a seat part, the vehicle seat being connectable to a vehicle structure, wherein the seat part is adjustable in a longitudinal direction relative to the vehicle structure by means of a kinematic assembly. State of the art

[0002] From WO 2005 / 061 269 A1, a vehicle seat is known, comprising a seat cushion and a backrest which are movably and / or detachably connected to the vehicle structure, wherein the vehicle seat can be moved from one design position to at least one other position, and the backrest is articulated to the vehicle structure by means of at least one rocker arm, wherein a pivoting movement of the provided rocker arms at least in phases provides a forward displacement of the backrest, whereby the vehicle seat assumes a forward operating position.

[0003] Vehicle seats with a longitudinally movable seat section are also known from the prior art, in which the seat section can be adjusted in a longitudinal direction relative to the vehicle structure by means of a rail arrangement. Vehicle seats with a longitudinally movable seat section are also known from the prior art, in which the seat section can be adjusted in a longitudinal direction relative to the vehicle structure by means of a four-bar linkage. A four-bar linkage has the disadvantage that an unintended, significant height adjustment is superimposed on the longitudinal adjustment.

[0004] For example, a vehicle seat with a parallel height adjuster is known from DE 10 2004 002 313 B3. Furthermore, a vehicle seat with a tilt adjustment is known from DE 10 2008 053 ​​476 A1, and a vehicle seat with an adjustment device that enables combined longitudinal, height, and tilt adjustment is known from DE 41 19 418 C1. Task

[0005] The invention is based on the objective of improving a vehicle seat of the type mentioned at the outset, in particular providing a longitudinally adjustable vehicle seat that does not have a rail arrangement, but in which a movement superimposed in a vertical direction is as small as possible during a longitudinal adjustment. Solution

[0006] This problem is solved according to the invention by a vehicle seat having the features of claim 1.

[0007] Because the kinematic assembly has a five-joint linkage, a longitudinally adjustable vehicle seat is provided which does not need to have a rail arrangement, but in which a very slight movement in the vertical direction is superimposed during a longitudinal adjustment.

[0008] Advantageous embodiments, which can be used individually or in combination with each other, are the subject of the dependent claims.

[0009] The five-joint linkage transmission can have a first swing arm, a second swing arm, and a linkage.

[0010] The first swing arm can be connected to the coupling via a first pivot joint. The second swing arm can be connected to the coupling via a second pivot joint.

[0011] The coupling can be connected to the seat section via a third pivot joint. The first swing arm can be connected to the vehicle structure via a fourth pivot joint or via an adapter that can be permanently attached to the vehicle structure. The second swing arm can be connected to the vehicle structure via a fifth pivot joint or via an adapter that can be attached to the vehicle structure.

[0012] Alternatively, the coupling can be connected to the vehicle structure via a third pivot joint or via an adapter that can be permanently attached to the vehicle structure. The first swing arm can be connected to the seat section via a fourth pivot joint, and the second swing arm can be connected to the seat section via a fifth pivot joint.

[0013] According to the invention, the kinematic assembly comprises a further linkage mechanism. The further linkage mechanism comprises exactly one support rocker arm.

[0014] The support arm can be connected to the seat base or to a seat tilt adjuster connected to the seat base via a sixth pivot joint. The seat tilt adjuster can be a multi-link or a three-link system. The support arm can be connected to the vehicle structure via a seventh pivot joint or to an adapter that can be connected to the vehicle structure.

[0015] The five-joint linkage can be located in a rear section of the seat. The other linkage can be located in a front section of the seat.

[0016] The five-joint linkage can be located in the front section of the seat. The other linkage can be located in the rear section of the seat.

[0017] In summary, and in other words, a vehicle seat according to the invention exhibits an approximately linear movement by means of a five-link kinematic system. This movement, which approximates a linear motion, results from the interaction of two rocker arms, in particular arranged in a crisscross pattern, which are rotationally connected to a coupling and a frame (e.g., the seat frame of a seat component). The drive can be implemented via a toothed segment, e.g., a toothed segment formed on the coupling, or via a spindle drive on the frame. Figures and embodiments of the invention

[0018] The invention is explained in more detail below with reference to advantageous embodiments illustrated in the figures. However, the invention is not limited to these embodiments. The figures show: Fig. 1: partial side view of a first embodiment of a vehicle seat according to the invention with a five-joint linkage and a further linkage, Fig. 2: A partial and highly schematic perspective view of a second embodiment of a vehicle seat according to the invention with a five-joint linkage, wherein a further linkage is not shown, Fig. 3: a partial perspective view of the second embodiment from Fig. 2 from a different perspective, Fig. 4: partial side view of the second embodiment in a rear longitudinal adjustment position, Fig. 5: partial side view of the second embodiment in a medium longitudinal adjustment position, and Fig. 6. Partial side view of the second embodiment in a front longitudinal adjustment position.

[0019] The vehicle seats 10, schematically depicted in the following figures, are described below using three mutually perpendicular spatial directions. A longitudinal direction x of a vehicle seat 10 installed in a vehicle runs largely horizontally and preferably parallel to a longitudinal direction of the vehicle, which corresponds to the vehicle's usual direction of travel. A transverse direction y, perpendicular to the longitudinal direction x, is also horizontally oriented in the vehicle and runs parallel to a transverse direction of the vehicle. A vertical direction z runs perpendicular to the longitudinal direction x and perpendicular to the transverse direction y. In a vehicle seat 10 installed in a vehicle, the vertical direction z runs parallel to the vehicle's vertical axis.

[0020] The position and direction designations used, such as front, rear, top, and bottom, refer to the viewing direction of an occupant seated in the vehicle seat 10 in a normal seating position, wherein the vehicle seat 10 is installed in the vehicle in a suitable operating position for passenger transport with the backrest 30 upright and oriented in the direction of travel as usual. However, the vehicle seat 10 according to the invention can also be installed in a different orientation, for example, transversely to the direction of travel.

[0021] Fig. Figure 1 shows a partial side view of a first embodiment of a vehicle seat 10 according to the invention. The vehicle seat 10 is largely symmetrical to a mirror plane perpendicular to the transverse direction y, so that only one side of the vehicle seat 10 is described below.

[0022] The vehicle seat 10 has a backrest 30 and a seat section 50. The vehicle seat 10 can be connected to a vehicle structure S. The seat section 50 is adjustable in the longitudinal direction x relative to the vehicle structure S by means of a kinematic assembly 100. The kinematic assembly 100 has a five-link linkage with a first pivot joint I, a second pivot joint II, a third pivot joint III, a fourth pivot joint IV, and a fifth pivot joint V. The five-link linkage also has a first rocker arm 110, a second rocker arm 120, and a link 130. The first rocker arm 110 is connected to the link 130 by means of the first pivot joint I. The second rocker arm 120 is connected to the link 130 by means of the second pivot joint II. The link 130 is connected to the seat section 50 by means of the third pivot joint III.The first swing arm 110 is connected to an adapter A, which can be rigidly connected to the vehicle structure S, by means of the fourth pivot joint IV. The second swing arm 120 is connected to an adapter A, which can be connected to the vehicle structure S, by means of a fifth pivot joint V.

[0023] The kinematic assembly 100 includes a further linkage mechanism. This further linkage mechanism includes a support arm 140. The support arm 140 is connected to the seat part 50 or to a seat tilt adjuster connected to the seat part 50 by means of a sixth pivot joint VI. The support arm 140 is connected to an adapter connectable to the vehicle structure S by means of a seventh pivot joint VII.

[0024] The five-joint linkage is located in a rear area of ​​the seat section 50. The other linkage is located in a front area of ​​the seat section 50.

[0025] The Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. Figure 6 shows a partial side view of a second embodiment of a vehicle seat 10 according to the invention.

[0026] The vehicle seat 10 has a backrest 30 and a seat section 50. The vehicle seat 10 is connectable to a vehicle structure S. The seat section 50 is adjustable in the longitudinal direction x relative to the vehicle structure S by means of a kinematic assembly 100. The kinematic assembly 100 has a five-link linkage with a first pivot joint I, a second pivot joint II, a third pivot joint III, a fourth pivot joint IV, and a fifth pivot joint V. The five-link linkage also has a first rocker arm 110, a second rocker arm 120, and a link 130. The first rocker arm 110 is connected to the link 130 by means of the first pivot joint I. The second rocker arm 120 is connected to the link 130 by means of the second pivot joint II. The link 130 is connected by means of a third pivot joint III to an adapter A, which can be rigidly connected to the vehicle structure S.The first swing arm 110 is connected to the seat part 50 by means of a fourth pivot joint IV. The second swing arm 120 is connected to the seat part 50 by means of a fifth pivot joint V.

[0027] The kinematic assembly 100 has another coupling mechanism, which is located in the Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. However, this is not shown in Figure 6. The further coupling mechanism has a support arm 140. The support arm 140 is connected to the seat part 50 or to a seat tilt adjuster connected to the seat part 50 by means of a sixth pivot joint VI. The support arm 140 is connected to an adapter connected to the vehicle structure S by means of a seventh pivot joint VII.

[0028] The coupling 130 has a toothed section that meshes with a pinion 205 of an electric geared motor 200. This allows the coupling 130 to be pivoted electrically about the third rotary joint III. The geared motor 200 is preferably attached to the seat part 50.

[0029] The five-joint linkage is located in a rear area of ​​the seat section 50. The other linkage is located in a front area of ​​the seat section 50.

[0030] The preferred positions of the pivot points I, II, III, IV, V, VI, VII in the longitudinal direction x and / or in the vertical direction z relative to each other in the rear longitudinal adjustment position, the middle longitudinal adjustment position and the front longitudinal adjustment position can determine the Fig. 4, Fig. 5 to Fig. 6 can be taken from it. Fig. 4, Fig. 5 to Fig. Figure 6 should be understood as technical drawings in this regard. For example, according to the Fig. 4, Fig. 5 to Fig. 6. In the rear longitudinal adjustment position, the fifth pivot point V is located behind the third pivot point III, and in the front longitudinal adjustment position, the fifth pivot point V is located in front of the third pivot point III. However, the invention is not limited to the components described in the Fig. 4, Fig. 5 to Fig. The positions of the pivot points I, II, III, IV, V, VI, VII shown in the illustration are limited relative to each other. Reference symbol list 10 vehicle seats 30 Backrest 50 seat section 100 Kinematics assembly 110 first swing arm 120 second swing arm 130 couplings 140 support swing arm 200 geared motor 205 sprocket I first pivot joint II second pivot joint III third pivot joint IV fourth pivot joint Fifth pivot joint VI sixth pivot VII seventh pivot An adapter S vehicle structure x Longitudinal direction y transverse direction z Vertical direction

Claims

[1] Vehicle seat (10), in particular motor vehicle seat, with a backrest (30) and a seat section (50), the vehicle seat (10) being connectable to a vehicle structure (S), wherein the seat section (50) is adjustable in a longitudinal direction (x) relative to the vehicle structure (S) by means of a kinematic assembly (100), wherein the kinematic assembly (100) comprises a five-link linkage (I, II, III, IV, V, 110, 120, 130), wherein the five-link linkage (I, II, III, IV, V, 110, 120, 130) comprises two cross-arranged rocker arms (110, 120) which are rotationally connected to a linkage (130) and a frame, wherein the kinematic assembly (100) comprises a further linkage (VI, VII, 140), characterized by , that the further coupling mechanism (VI, VII, 140) has exactly one support rocker arm (140). [2] Vehicle seat (10) according to claim 1, characterized by, that a first rocker arm (110) is connected to the coupling (130) by means of a first pivot joint (I), and a second rocker arm (120) is connected to the coupling (130) by means of a second pivot joint (II). [3] Vehicle seat (10) according to claim 1 or 2, characterized by , that the coupling (130) is connected to the seat part (50) by means of a third pivot joint (III), the first swing arm (110) can be connected to the vehicle structure (S) by means of a fourth pivot joint (IV) or is connected to an adapter (A) that can be firmly connected to the vehicle structure (S), and the second swing arm (120) can be connected to the vehicle structure (S) by means of a fifth pivot joint (V) or is connected to an adapter (A) that can be connected to the vehicle structure (S). [4] Vehicle seat (10) according to any of the preceding claims, characterized by, that the coupling (130) can be connected to the vehicle structure (S) by means of a third pivot joint (III) or is connected to an adapter (A) that can be permanently connected to the vehicle structure (S), the first swing arm (110) is connected to the seat part (50) by means of a fourth pivot joint (IV), and the second swing arm (120) is connected to the seat part (50) by means of a fifth pivot joint (V). [5] Vehicle seat (10) according to any of the preceding claims, characterized by , that the support arm (140) is connected to the seat part (50) or to a seat tilt adjuster connected to the seat part (50) by means of a sixth pivot joint (VI), and that the support arm (140) can be connected to the vehicle structure (S) by means of a seventh pivot joint (VII) or to an adapter that can be connected to the vehicle structure (S). [6] Vehicle seat (10) according to any of the preceding claims, characterized by, that the five-joint linkage (I, II, III, IV, V, 110, 120, 130) is arranged in a rear area of ​​the seat part (50) and the further linkage (VI, VII, 140) is arranged in a front area of ​​the seat part (50). [7] Vehicle seat (10) according to any one of claims 1 to 5, characterized by , that the five-joint linkage (I, II, III, IV, V, 110, 120, 130) is arranged in a front area of ​​the seat part (50) and the further linkage (VI, VII, 140) is arranged in a rear area of ​​the seat part (50).

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