Device for adjusting a seat, and installation assembly for such a device

Patent metadata

Field	Value
Publication number	US-2025276615-A1
Application number	US-202318862640-A
Country	US
Kind code	A1
Filing date	Apr 28, 2023
Priority date	May 2, 2022
Publication date	Sep 4, 2025
Grant date	—

Abstract

A device adjusts a seat, which has a seat part and a backrest adjustable between two end positions including an upright position and a folded-over folding position, using an adjustment mechanism. The adjustment mechanism has opposing rotary fittings connected together via a shaft that extends along the shaft axis. The device is provided for detecting the two end positions. A spindle is connected to the shaft and a spindle nut is moved in the longitudinal direction in a translational manner when the shaft is rotated. The spindle nut is part of a driver which has an actuation element for a limit switch. The driver is guided in a forced manner by a mechanical slotted guide such that the translational movement is superimposed with a rotational movement of the driver, and the slotted guide is configured such that the actuation element actuates only one limit switch in the two end positions.

First claim

1 - 14 . (canceled)

15 . A device for adjusting a seat having a seat part and a backrest being adjusted between two end positions, namely between an upright position and a folded-over folding position, the device comprising:
a shaft; an adjustment mechanism having opposing rotary fittings connected together via said shaft being rotatable about a shaft axis and extending along a shaft axis in a longitudinal direction; a limit switch; an apparatus for detecting the two end positions, said apparatus having a spindle connected to said shaft and a spindle nut being moved in the longitudinal direction in a translational manner when said shaft is rotated, wherein said spindle nut is part of a driver which has an actuation element for said limit switch; and a mechanical slotted guide, said driver being guided in a forced manner by means of said mechanical slotted guide such that a translational movement is superimposed with a rotational movement of said driver and said mechanical slotted guide is configured such that said actuation element actuates said limit switch in the two end positions.

16 . The device according to claim 15 , wherein said mechanical slotted guide is configured such that during the translational movement of said driver in the longitudinal direction said driver is actuated in different rotational directions.

17 . The device according to claim 15 , wherein said mechanical slotted guide is configured such that during a course of the translational movement in the longitudinal direction in a starting region said driver rotates in a rotational direction and in an end region the driver rotates in an opposing direction to the rotational direction, such that in the starting region said actuation element actuates said limit switch by the rotational movement in the rotational direction and, said actuation element is lifted away from said limit switch and that in the end region said actuation element actuates said limit switch again by the rotational movement in the opposing direction to the rotational direction.

18 . The device according to claim 17 , wherein a central region is configured between the starting region and the end region, wherein said limit switch is not actuated in said central region.

19 . The device according to claim 15 , wherein said mechanical slotted guide has portions with different gradients so that, depending on a translational position of said driver along said spindle, said driver has different rotational speeds and/or different rotational directions.

20 . The device according to claim 15 , wherein said driver has a sleeve-shaped part with an internal thread for forming said spindle nut and that at least one of the following elements is configured on a peripheral side on said sleeve-shaped part:
a holder for an end piece of a control element; said actuation element is configured as a rib oriented in the longitudinal direction or has two sections which are spaced apart from one another in the longitudinal direction; and a guide element which engages in said mechanical slotted guide.

21 . The device according to claim 15 , wherein said driver is configured as a monolithic, one-piece component.

22 . The device according to claim 15 , further comprising a carrier component, said carrier component having said mechanical slotted guide and a bearing for said spindle.

23 . The device according to claim 22 , wherein said carrier component also has at least one of the following elements:
at least one fastening element for fastening said carrier component to the backrest; a guide for a control element; and a mount for an electronic assembly which contains said limit switch.

24 . The device according to claim 22 , wherein said carrier component is a one-piece, monolithic component.

25 . An installation assembly for a device, the installation assembly comprising:
a carrier component having a slotted guide and a bearing; a driver forming a spindle nut; a spindle rotatably mounted on said bearing of said carrier component and configured for passing through a shaft and for connecting to the shaft fixedly in terms of rotation; a guide element disposed on said driver for engaging in said slotted guide; and an actuation element for a limit switch and/or a holder for an end piece of a control element.

26 . A device for adjusting a seat, the seat having a seat part and a backrest being adjusted between two end positions, namely between an upright position and a folded-over folding position, the device comprising:
a shaft; a releasable locking mechanism; an adjustment mechanism having opposing rotary fittings connected together via said shaft being rotated about a shaft axis and extending along a shaft axis in a longitudinal direction, wherein a head restraint is fastened to the backrest, the head restraint being able to be folded over from an operating position into a folded-over position and being able to be locked in the operating position by means of said releasable locking mechanism; a driver being connected to said shaft and performing a rotational movement about the shaft axis when said shaft is rotated; and a control element fastened to said driver, said control element connected to said releasable locking mechanism for an actuation of said releasable locking mechanism, such that when the backrest is adjusted an actuation of said releasable locking mechanism takes place automatically via said control element.

27 . The device according to claim 26 ,
further comprising a spindle connected to said shaft; wherein said driver has a spindle nut which is moved in the longitudinal direction in a translational manner when said shaft is rotated; and further comprising a slotted guide, said driver is guided in a forced manner by means of said slotted guide for generating a rotational movement.

28 . The device according to claim 26 , wherein said control element has a cable or a wire.

29 . The device according to claim 26 , wherein said slotted guide is configured such that during a translational movement of said driver in the longitudinal direction said driver is actuated in different rotational directions.

30 . The device according to claim 26 , wherein said slotted guide is configured such that during a course of a translational movement in the longitudinal direction in a starting region said driver rotates in a rotational direction and in an end region the driver rotates in an opposing direction to the rotational direction, such that in the starting region said control element is loaded and, in particular, tensioned by the rotational movement in the rotational direction and a control stroke is performed for actuating said releasable locking mechanism and that in the end region said control element is relieved of load by the rotational movement in the opposing direction to the rotational direction.

31 . The device according to claim 27 , wherein said slotted guide has portions with different gradients so that, depending on a translational position of said driver along said spindle, said driver has different rotational speeds and/or different rotational directions.

32 . The device according to claim 27 , wherein said driver has a sleeve-shaped part with an internal thread for forming said spindle nut and that at least one of the following elements is configured on a peripheral side on said sleeve-shaped part;
a holder for an end piece of said control element; an actuation element configured as a rib oriented in the longitudinal direction or has two sections which are spaced apart from

Assignees

• Brose Fahrzeugteile Se & Co Kg Coburg

Inventors

• Schröder Waldemar
• Ultsch Johannes

Classifications

• B60N2/233

  by linear screw mechanisms · CPC title

• B60N2/0272 Primary

  using sensors or detectors for detecting the position of seat parts · CPC title

• B60N2205/50

  Interlocking shaft arrangements transmitting movement between hinge mechanisms on both sides of a seat · CPC title

• B60N2/2252 Primary

  in which the central axis of the gearing lies inside the periphery of an orbital gear, e.g. one gear without sun gear · CPC title