MOTOR VEHICLE SEAT

Abstract

A motor vehicle seat with a seat inclination adjustment device, with a first base element, a first seat frame element and a first actuator element, the actuator element has a lower link arm connected to the base element and arranged movably relative to the base element, an upper link arm connected to the lower link arm and movably arranged relative to the lower link arm, the upper link arm is connected to the seat frame element and is movably arranged, and a linear actuator with first and second linear actuator elements, the first linear actuator element is movably connected to the second linear actuator element and the first linear actuator element is movably connected to the base element and the second linear actuator element is movably connected to one of the link arms.

Claims

1. A motor vehicle seat with a seat inclination adjustment device, with a base element, a seat frame element, and a first actuator element, wherein the first actuator element has a lower link arm which is connected to the base element via a lower link and is movably arranged relative to the base element, has an upper link arm connected to the lower link arm via a middle link and arranged movably relative to the lower link arm, wherein the upper link arm is connected to the seat frame element via an upper link and is movably arranged, and has a linear actuator with a first linear actuator element and a second linear actuator element, wherein the first linear actuator element is movably connected to the second linear actuator element via a linear movement, characterized in that the first linear actuator element is movably connected to the base element via a first linear actuator link and/or the second linear actuator element is movably connected to one of the link arms via a second linear actuator link.

2. The motor vehicle seat with a seat inclination adjustment device of claim 1 characterized in that the second linear actuator element is connected to the lower link arm.

3. The motor vehicle seat with a seat inclination adjustment device of claim 1 characterized in that the seat inclination adjustment device has a second actuator element.

4. The motor vehicle seat with a seat inclination adjustment device of claim 1 characterized in that the actuator element has a motor, wherein the motor is coupled to two actuator elements via two shafts, wherein at least one of the shafts is a flex shaft.

5. The motor vehicle seat with a seat inclination adjustment device of claim 1 characterized in that the base element is an adapter element which is connected to one or both upper rails of a longitudinal seat adjustment.

6. The motor vehicle seat with a seat inclination adjustment device of claim 1 characterized in that the linear actuator element is a spindle with a spindle worm, wherein the spindle is fastened to the base element and/or the spindle worm is fastened to the link arm.

7. A method for adjusting the seat inclination of a motor vehicle seat, with a base element, a lower link arm which is connected to the base element via a lower link and is movably arranged relative to the base element, an upper link arm connected to the lower link arm via a middle link and arranged movably relative to the lower link arm, a seat frame element which is connected to the upper link arm via an upper link and is movably arranged with respect to the upper link arm, a linear actuator with a first and a second linear actuator element, wherein the seat inclination is adjusted via a linear movement of a first linear actuator element relative to a second linear actuator element characterized in that the first linear actuator element is movably connected to the base element via a first linear actuator link and/or the second linear actuator element is movably connected to one of the link arms via a second linear actuator link.

8. The method for adjusting the seat inclination of a motor vehicle seat of claim 7 characterized in that the second linear actuator element is movably connected to the lower link arm via a second linear actuator link.

9. The method for adjusting the seat inclination of a motor vehicle seat of claim 7 characterized in that the linear actuator element is a spindle with a spindle worm,

10. The method for adjusting the seat inclination of a motor vehicle seat of claim 9 characterized in that the spindle is fastened to the base element and/or the spindle worm is fastened to the link arm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG. 1a: is a perspective view of the seat inclination adjustment device according to the invention with the seat inclination in the minimum position

[0032] FIG. 1b: is a plan view of the seat inclination adjustment device according to the invention with the seat inclination in the minimum position

[0033] FIG. 1c: is a side view of the seat inclination adjustment device according to the invention with the seat inclination in the minimum position

[0034] FIG. 2a: is a perspective view of the seat inclination adjustment device according to the invention with the seat inclination in the maximum position

[0035] FIG. 2b: is a side view of the seat inclination adjustment device according to the invention with the seat inclination in the maximum position

[0036] FIG. 3: is an exploded view of the seat inclination adjustment device according to the invention

[0037] FIG. 4: is a perspective view of the seat inclination adjustment device according to the invention

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

[0038] FIG. 1 shows an exemplary embodiment of the seat inclination adjustment device 10 according to the invention, with the seat inclination being adjusted in the minimum position. The motor vehicle seat 1 has a seat frame 7 for a seat cushion 6 and a backrest 5 which is pivotally mounted on the seat frame 7. The longitudinal seat adjustment 2 has an upper rail 3 and a lower rail 4 (FIG. 1b). The motor vehicle seat 1 is firmly connected to the upper rail 3, which in turn is guided in the lower rail 4 so that it can be adjusted in the longitudinal direction. To adjust the inclination of the seat frame 7 about the axis of rotation D, the motor vehicle seat 1 has the seat inclination adjustment device 10. The seat inclination adjustment device 10 is arranged on the front side of the motor vehicle seat 1 (FIG. 1a).

[0039] The seat inclination adjustment device 10 has the base element 12 which is fixedly arranged on the upper rail 3. The base element 12 is preferably an adapter element which is connected to the upper rail 3 of the longitudinal seat adjustment 2 simply and quickly, for example by means of a clip or plug-in connection. The base element 12 is connected to the lower link arm 15.1, 15.2 via the lower link 17.1, 17.2. The lower link arm 15.1, 15.2 is pivotally connected to the upper link arm 16.1, 16.2 by the middle link 18.1, 18.2 (FIG. 1c). The upper link arm 16.1, 16.2 is pivotally connected to the seat frame element 11 by the upper link 19.1, 19.2.

[0040] In the minimum position of the seat inclination adjustment device 10 shown in this figure, the lower link arm 15.1, 15.2 is aligned almost horizontally, the lower link arm 15.1, 15.2 and the upper link arm 16.1, 16.2 having an angle of less than 90° to one another. The seat inclination adjustment device 10 is driven via a motor 30. The adjustment motor 30 is an electric motor which drives the actuator elements 13, 14 of the linear actuator 24 via two flex shafts 13.3, 14.3 which are arranged on opposite end faces of the motor 30 on its drive shaft. The electric motor 30 is arranged in the middle between the actuator elements 13, 14 and is reversible, this meaning that the direction of rotation of the electric motor 30 can be reversed in order to drive the adjustment of the seat frame 7 in two directions (upwards, downwards) by generating a force. The actuator elements 13, 14 themselves are arranged as mirror images on opposite longitudinal sides of the motor vehicle seat 1 (FIG. 1a) and are constructed mirror-symmetrically to one another.

[0041] The first actuator element 13 (FIG. 1c) has a first linear actuator element 13.1 and a second linear actuator element 13.2 and is designed as a spindle 13.1 with a spindle worm 13.2. The spindle 13.1 is rotatably fastened to the base element 12 via the 1st linear actuator link 22, the spindle worm 13.2 being rotatably fastened to the lower link arm 15.1 via the 2nd linear actuator link 23 of the actuator element 13. The same applies to the second actuator element 14, only in a mirror inverted way.

[0042] To adjust the seat inclination, the motor 30 is put into operation, driving the spindle worm 13.2, 14.2 of both actuator elements 13, 14 at the same speed via the flex shafts 13.3, 14.3. The spindle worm 13.2, 14.2 also drives the spindles 13.1, 14.1 at the same speed. The spindles 13.1, 14.1 thus perform a linear movement, with the spindles 13.1, 14.1 pivoting the lower link arm 15.1, 15.2 (see FIG. 2). The actuator elements 13, 14 are guided closer to the base elements 12 by the linear movement of the spindles 13.1, 14.1, the lower link arm 15.1, 15.2 pivots the upper link arm 16.1, 16.2, which is pivotally connected to the lower link arm 15.1, 15.2 through the middle link 18.1, 18.2. The angle between the lower link arm 15.1, 15.2 and the upper link arm 16.1, 16.2 is increased, the seat frame 7 pivots about the axis of rotation D.

[0043] An exemplary embodiment of the seat inclination adjustment device 10 according to the invention, in which the seat inclination is adjusted in the maximum position, is shown in FIG. 2. The seat inclination adjustment device 10 is the same described in the previous figure (see FIG. 1). The actuator elements 13, 14 (FIG. 2a) which are arranged in a mirror-inverted way on the longitudinal sides of the motor vehicle seat 1 have the minimum possible distance to the base elements 12, the spindles 13.1, 14.1 are extended to the maximum (FIG. 2b). The lower link arm 15.1, 15.2 is aligned almost vertically, the lower link arm 15.1, 15.2 and the upper link arm 16.1, 16.2 have an angle greater than 90° to one another.

[0044] FIG. 3 shows an exploded view of an exemplary embodiment of the seat inclination adjustment device 10 according to the invention. The seat inclination adjustment device 10 is arranged on the front of the motor vehicle seat 1. The seat inclination adjustment device 10 has the base elements 12 which are fixedly arranged on the upper rails 3 of a seat adjustment device 2 (not shown). The base elements 12 are connected to the lower link arms 15.1, 15.2 via lower links 17.1, 17.2. The lower link arms 15.1, 15.2 are pivotally connected to the upper link arms 16.1, 16.2 by middle links 18.1, 18.2. The seat inclination adjustment device 10 is driven by a motor 30. The motor 30 has a cover G. The electric motor 30 is arranged in the middle between the actuator elements 13, 14. The adjusting motor 30 is an electric motor which drives the actuator elements 13, 14 via two flex shafts 13.3, 14.3 which are arranged on opposite end faces of the motor 30 on its drive shaft. The actuator elements 13, 14 themselves are arranged as mirror images on opposite longitudinal sides of the motor vehicle seat 1 and are constructed mirror-symmetrically to one another. The actuator elements 13, 14 each have a first linear actuator element (spindle) 13.1, 14.1 and a second linear actuator element (spindle worm) 13.2, 14.2. The spindles 13.1, 14.1 are rotatably fastened to the base elements 12 via a 1st linear actuator link 22, the spindle worms 13.2, 14.2 are rotatably fastened to the lower link arms 15.1, 15.2 via the 2nd linear actuator link 23 of an actuator element 13, 14.

[0045] A perspective view of an embodiment of the seat inclination adjustment device 10 according to the invention is shown in FIG. 4. The seat inclination adjustment device 10 is the same shown in the previous figures (see FIGS. 1-3). The electric motor 30 is arranged in the middle between the actuator elements 13,14. To adjust the seat inclination, the motor 30 drives both actuator elements 13, 14 at the same speed via the flex shafts 13.3, 14.3. The combination of spindle worm 13.2, 14.2 with spindles 13.1, 14.1 enables the seat inclination adjustment device 10 according to the invention to withstand greater forces than previously known seat inclination adjustment devices, in particular during a frontal collision. In addition, due to the small dimensions of the seat inclination adjustment device 10 according to the invention, it is possible to mount the actuator elements 13, 14 symmetrically, which causes an even distribution of force on the longitudinal sides during an accident. At the same time, due to the small dimensions, the seat inclination adjustment device 10 according to the invention can be implemented in motor vehicle seats which are provided with an integrated belt system. The seat inclination adjustment device 10 is based on standardized drive elements which are tested and known.

LIST OF REFERENCE NUMERALS

[0046] 1 motor vehicle seat [0047] 2 longitudinal seat adjustment [0048] 3 upper rail [0049] 4 lower rail [0050] 5 backrest [0051] 6 seat cushion [0052] 7 seat frame [0053] 10 seat inclination adjustment device [0054] 11 seat frame element [0055] 12 base element [0056] 13 1st actuator element [0057] 13.1 1st linear actuator element of the 1st actuator element [0058] 13.2 2nd linear actuator element of the 1st actuator element [0059] 13.3 1st flex shaft of the 1st actuator element [0060] 14 2nd actuator element [0061] 14.1 1st linear actuator element of the 2nd actuator element [0062] 14.2 2nd linear actuator element of the 2nd actuator element [0063] 14.3 2nd flex shaft of the 2nd actuator element [0064] 15.1, 15.2 lower link arm [0065] 16.1, 16.2 upper link arm [0066] 17.1, 17.2 lower link [0067] 18.1, 18.2 middle link [0068] 19.1, 19.2 upper link [0069] 22 1st linear actuator link [0070] 23 2nd linear actuator link [0071] 24 linear actuator [0072] 30 motor [0073] D axis of rotation