Head restraint for a vehicle seat

• US 20020043860A1
• Filed: 03/16/2001
• Published: 04/18/2002
• Est. Priority Date: 03/16/2000
• Status: Active Grant

• Current Assignee: Daimler AG (Mercedes-Benz Group AG)
• Original Assignee: Daimler Chrysler Company LLC (Stellantis NV)
• Inventors: Schrader, Juergen, Orizaris, Vasilios, Dinkel, Emil
• Granted Patent: US 6,511,130 B2
• Time in Patent Office: Days
• US Class Current: 297/410
• CPC Class Codes: B60N 2/809 vertically slidable
• CPC Class Codes: B60N 2/853 characterised by their adjusting mechanisms, e.g. electric motors
• CPC Class Codes: B60N 2/865 providing a fore-and-aft movement with respect to the occupant's head
• CPC Class Codes: B60N 2/891 with the head-rest being comma-shaped in side view

Abstract

A head restraint for a vehicle seat has a holding element which can be inserted into a seat backrest in a manner allowing it to be displaced vertically. A padding support is arranged on the holding element which holds a padded headrest intended for supporting the head. A pivoting device is arranged between the holding element and padding support and is intended for setting the inclination of the padded headrest about a rotational axis orientated transversely to the seat depth. In order to provide a head restraint which is anatomically shaped and can be set in height and inclination in such a manner that in every position it forms a continuation of the contour of the seat occupant'"'"'s back, the padded headrest has a padded tongue which is pulled out downwards over the padding support for the purpose of supporting the back of the neck. The contour of the front surface of the padded headrest and padded tongue reproduces the profile of the back of the head and back of the neck. The pivoting device is designed so that the rotational axis of the padded headrest lies outside the head-restraint structure and, in all possible vertical settings of the head restraint, always lies on the level backrest surface.

Claims

1. Head restraint for a vehicle seat having a seat cushion and backrest, comprising:

a holding element which can be inserted into the backrest in a manner allowing it to be displaced vertically and latched in place,

a padding support arranged on the holding element,

a padded headrest which is held on the padding support and is intended for supporting an occupant'"'"'s head, and

a pivoting device which is arranged between the holding element and padding support and is intended for inclining the padded headrest about a rotational axis orientated transversely to a seat depth,

wherein the padded headrest has a padded tongue which is integral to it and is pulled out downwards over the padding support for the purpose of supporting a back of an occupant'"'"'s neck,

wherein a contour of a front surface of the padded headrest and padded tongue reproduces a profile of a back of a head and back of a neck of a vehicle human occupant, and

wherein the pivoting device is designed in such a manner that the rotational axis of the padded headrest lies outside the head-restraint structure and, in all intended use vertical settings of the head restraint, always lies on a front surface of the backrest facing the seat occupant.

2. Head restraint according to claim 1, wherein the pivoting device has at least one pair of sliding elements which can be displaced relative to one another along a circular arc section concentric to the rotational axis and of which one is fastened to the holding element and one to the padding support.

3. Head restraint according to claim 2, wherein said at least one pair of sliding elements includes two of said pairs spaced transversely from one another.

4. Head restraint according to claim 2, wherein the sliding elements have, on mutually facing sides, sliding surfaces which are in the form of a circular arc section, are arranged concentrically to the rotational axis and are supported on one another directly or via rolling or sliding bodies.

5. Head restraint according to claim 3, wherein the sliding elements have, on mutually facing sides, sliding surfaces which are in the form of a circular arc section, are arranged concentrically to the rotational axis and are supported on one another directly or via rolling or sliding bodies.

6. Head restraint according to claim 4, wherein one of the sliding elements, on a side facing away from the other sliding element, is supported by way of a further sliding surface arranged concentrically to the rotational axis on an identically formed sliding surface of a further sliding element directly or via rolling or sliding bodies, and

wherein the further sliding element is connected fixedly to the other sliding element via one of the padding support and the holding element.

7. Head restraint according to claim 5, wherein one of the sliding elements, on a side facing away from the other sliding element, is supported by way of a further sliding surface arranged concentrically to the rotational axis on an identically formed sliding surface of a further sliding element directly or via rolling or sliding bodies, and

wherein the further sliding element is connected fixedly to the other sliding element via one of the padding support and the holding element.

8. Head restraint according to claim 2, wherein for the relative displacement of the sliding elements, a toothed-ring segment which is concentric to the rotational axis is fixed on one sliding element and a toothed wheel which meshes with the toothed-ring segment is fixed by its toothed-wheel shaft on the other sliding element, and

wherein the toothed-wheel shaft can be driven by means of one of a handwheel and an electric motor.

9. Head restraint according to claim 4, wherein for the relative displacement of the sliding elements, a toothed-ring segment which is concentric to the rotational axis is fixed on one sliding element and a toothed wheel which meshes with the toothed-ring segment is fixed by its toothed-wheel shaft on the other sliding element, and

wherein the toothed-wheel shaft can be driven by means of one of a handwheel and an electric motor.

10. Head restraint according to claim 6, wherein for the relative displacement of the sliding elements, a toothed-ring segment which is concentric to the rotational axis is fixed on one sliding element and a toothed wheel which meshes with the toothed-ring segment is fixed by its toothed-wheel shaft on the other sliding element, and

wherein the toothed-wheel shaft can be driven by means of one of a handwheel and an electric motor.

11. Head restraint according to claim 1, wherein the pivoting device has at least one toothed-ring segment which is arranged concentrically to the rotational axis and a toothed wheel which meshes with the toothed-ring segment and of which one is fastened to the padding support and one to the holding element, and

wherein the at least one toothed wheel can be driven by one of a handwheel and an electric motor.

12. Head restraint according to claim 1, wherein the pivoting device has at least one pair of toothed-ring segments which are arranged at a radial distance from one another concentrically to the rotational axis and whose rows of teeth face one another, and at least one pair of toothed wheels which respectively mesh with one of the toothed-ring segments, are respectively seated on a toothed-wheel shaft and of which one pair of toothed-ring segments is fixed on one of the padding support and the holding element and one pair of toothed wheels is fixed by their toothed-wheel shafts to the other of the padding support and the holding element,

wherein there is arranged in a rotationally fixed manner on the toothed-wheel shaft of the one toothed wheel a driving toothed wheel which meshes with the other toothed wheel, and

wherein the toothed-wheel shaft carrying the driving wheel can be driven by one of a handwheel and an electric motor.

13. Head restraint according to claim 11, wherein the toothed segments and the toothed wheels are each present in duplicate and are arranged at a transverse distance from one another.

14. Head restraint according to claim 12, wherein the toothed segments and the toothed wheels are each present in duplicate and are arranged at a transverse distance from one another.

15. Head restraint according to claim 1, wherein the pivoting device has at least one upper and at least one lower pivoting lever which are each coupled on the end side to the holding element and padding support, and

wherein at least one lever can be pivoted by one of manually and by motor.

16. Head restraint according to claim 15, wherein the at least one upper lever is coupled to a lever-pivoting element which is vertically displaceable on the holding element and can be displaced by one of manually and by motor.

17. Head restraint according to claim 16, wherein the lever-pivoting element has a toothing arrangement and a driving pinion which meshes with the toothing arrangement is fixed in a rotatable manner by its pinion shaft to the holding element, and

wherein the pinion shaft can be driven by means of one of a handwheel and an electric motor.

18. Head restraint according to claim 15, wherein the coupling of the pivoting levers on the holding-element side is undertaken at a respective threaded sleeve,

wherein the threaded sleeves can be screwed onto threaded sections having opposed thread pitches on a threaded spindle which is fixed to the holding element, and

wherein the threaded spindle can be driven by means of one of manually and an electric motor.

19. Head restraint according to claim 18, wherein the coupling of the at least one upper lever is undertaken via a guide with an elongated slot.

20. Head restraint according to claim 18, wherein the pivoting levers are designed as angled levers.

21. Head restraint according to claim 19, wherein the pivoting levers are designed as angled levers.

22. Head restraint according to claim 15, wherein the upper and lower pivoting levers are each present in pairs and are arranged at a transverse distance from one another.

23. Head restraint according to claim 16, wherein the upper and lower pivoting levers are each present in pairs and are arranged at a transverse distance from one another.

24. Head restraint according to claim 17, wherein the upper and lower pivoting levers are each present in pairs and are arranged at a transverse distance from one another.

25. Head restraint according to claim 18, wherein the upper and lower pivoting levers are each present in pairs and are arranged at a transverse distance from one another.

26. Head restraint according to claim 19, wherein the upper and lower pivoting levers are each present in pairs and are arranged at a transverse distance from one another.

27. Head restraint according to claim 20, wherein the upper and lower pivoting levers are each present in pairs and are arranged at a transverse distance from one another.

28. Head restraint according to claim 1, wherein the pivoting device has at least one pair of levers which are hinged to one another in a scissors-like manner and of which one is coupled on an end side to the holding element at one end and to the padding support at the other end and the other is coupled on an end side via a respective slotted guide to the holding element at one end and to the padding support at the other end.

29. Head restraint according to claim 28, wherein two of said pairs of levers are provided which are arranged at a transverse distance from one another.

30. A vehicle seat head restraint adapted to be vertically adjustable in use with respect to a vehicle seat backrest, comprising:

a padded headrest operable to support a vehicle occupant'"'"'s head, and

a pivoting device operable for adjustably inclining the padded headrest with pivotal movement about a pivot axis extending transversely of a seat backrest,

wherein the padded headrest includes a downwardly extending padded tongue contoured to support an occupant'"'"'s neck when the padded headrest engages an occupant'"'"'s head, and

wherein the pivoting device includes means to locate the pivot axis at a forward side of the vehicle seat backrest for all intended use vertical adjusted positions of the padded headrest with respect to the vehicle seat backrest.

31. A vehicle seat assembly comprising:

a seat cushion,

a seat backrest extending upwardly at a back side of the seat cushion,

a head restraint carried by and vertically adjustable with respect to the backrest, and

a pivoting device operable for adjustably inclining the padded headrest with pivotal movement about a pivot axis extending transversely of a seat backrest,

wherein the padded headrest includes a downwardly extending padded tongue contoured to support an occupant'"'"'s neck when the padded headrest engages an occupant'"'"'s head, and

wherein the pivoting device includes means to locate the pivot axis at a forward side of the vehicle seat backrest for all intended use vertical adjusted positions of the padded headrest with respect to the vehicle seat backrest.