Fitting for a vehicle seat

Abstract

In the case of a fitting (10) for a vehicle seat, in particular for a motor vehicle seat, having a first fitting part (11), a second fitting part (12) in geared connection with the first fitting part (11), and a rotatably mounted eccentric (26, 27) driven by a driver (21, 26) to cause relative rolling between the first fitting part (11) and the second fitting part (12), the first fitting part (11) and the second fitting part (12) together form a disc-shaped unit held together by a clamping ring (51), and a third fitting part (74) can be both pivoted relative to the first fitting part (11) and locked with respect to the first fitting part (11).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is described in more detail below with reference to an exemplary embodiment illustrated in the drawings, in which:

FIG. 1 shows a section through the exemplary embodiment,

FIG. 2 shows a section through the exemplary embodiment along the line II-II in FIG. 1, with parts of the backrest and seat part being diagrammatically illustrated,

FIG. 3 shows a section through the exemplary embodiment, along the line III-III in FIG. 1,

FIG. 4 shows a diagrammatic illustration of a vehicle seat, and

FIG. 5 shows an exploded illustration of the exemplary embodiment.

Claims

1. A fitting for a vehicle seat, the fitting comprising: a disc-shaped unit comprising a first fitting part and a second fitting part, wherein there is geared connection between the first fitting part and the second fitting part so that there can be relative rolling between the first fitting part and the second fitting part;a clamping ring that holds the disc-shaped unit together;a rotatably mounted eccentric for being driven, and for causing the relative rolling between the first fitting part and the second fitting part in response to the eccentric being driven;a driver for driving the eccentric so that the eccentric causes the relative rolling between the first fitting part and the second fitting part;a third fitting part mounted for being pivoted relative to the first fitting part; anda locking mechanism for providing locked and unlocked states of the third fitting part, wherein the third fitting part is at least indirectly locked with respect to the first fitting part during the locked state of the third fitting part, andthe third fitting part can be pivoted relative to the first fitting part during the unlocked state of the third fitting part.

2. The fitting according to claim 1, wherein the fitting is configured so that there is a superimposed wobbling motion during the relative rolling between the first fitting part and the second fitting part.

3. The fitting according to claim 1, wherein: the driver comprises a driving bushing made of plastic and a driving ring made of metal, andthe driving bushing and the driving ring are connected to each other with a positive fit by way of a transmission profile.

4. The fitting according to claim 3, wherein: the transmission profile comprises a transmission profile of the driving bushing; andmaterial of the transmission profile of the driving bushing is displaced during assembly of the driver.

5. The fitting according to claim 3, wherein: the first fitting part includes a collar element;the driving ring is mounted on the collar element; andthe driving bushing is mounted in the collar element with play.

6. The fitting according to claim 5, wherein the eccentric comprises: a part of the driving ring which is mounted on the collar element, andtwo oppositely tensioned wedge segments.

7. The fitting according to claim 3, wherein the driving bushing has a receptacle for receiving a motor-driven drive shaft in a rotationally fixed manner.

8. The fitting according to claim 1, wherein the fitting is operative for steplessly adjusting inclination of a backrest of the vehicle seat by way of the relative rolling between the first fitting part and the second fitting part, which occurs in response to the eccentric being driven.

9. The fitting according to claim 1, wherein the third fitting part is for enabling centered, free pivoting of a backrest of the vehicle seat relative to the first fitting part.

10. The fitting according to claim 9, wherein the third fitting part being mounted for being pivoted relative to the first fitting part comprises: the third fitting part being pivotably mounted on a bearing ring.

11. The fitting according to claim 10, wherein the bearing ring is fixedly connected to the first fitting part.

12. The fitting according to claim 1, wherein: the locking mechanism comprises a detent element for at least indirectly locking the third fitting part to the first fitting part, andthe detent element is formed separately from the first fitting part.

13. The fitting according to claim 10, wherein: a preassembled component comprises the third fitting part and at least a portion of the locking mechanism;the locking mechanism comprises a detent element for at least indirectly locking the third fitting part to the first fitting part;the detent element is formed separately from the first fitting part; andthe detent element is fixedly connected to the bearing ring.

14. The fitting according to claim 12, wherein the detent element is at least indirectly fixedly connected to the first fitting part.

15. The fitting according to claim 12, wherein: the locking mechanism comprises a pawl;the pawl is carried by the third fitting part; andthe pawl is in locking engagement with the detent element during the locked state of the third fitting part.

16. The fitting according to claim 15, further comprising a spring-loaded securing element, wherein during the locked state of the third fitting part, the spring-loaded securing element secures the pawl in the locking engagement with the detent element.

17. The fitting according to claim 16, wherein the securing element can be pivoted relative to the pawl by moving an unlocking pin connected with the securing element.

18. The fitting of claim 1 in combination with the vehicle seat, wherein the fitting is operative for at least both: adjusting inclination of a backrest of the vehicle seat by way of the relative rolling between the first fitting part and the second fitting part, which occurs in response to the eccentric being driven; andenabling free pivoting of the backrest of the vehicle seat relative to both the first fitting part and the second fitting part.

19. The fitting according to claim 10, wherein: the locking mechanism comprises a detent element for at least indirectly locking the third fitting part to the first fitting part,the detent element is formed separately from the first fitting part, andthe detent element is carried by, and fixed with respect to, the bearing ring.

20. The fitting according to claim 11, wherein the bearing ring being fixedly connected to the first fitting part comprises: the bearing ring being welded to the first fitting part.

21. The fitting according to claim 13, wherein the bearing ring is fixedly connected to the first fitting part.

22. The fitting according to claim 12, wherein the detent element is at least indirectly fixedly connected to the first fitting part.

23. The fitting according to claim 15, wherein: a bearing ring is fixed with respect to the first fitting part;the third fitting part is pivotably mounted on the bearing ring; andthe detent element is fixed with respect to, and carried by, the bearing ring.

24. A fitting for a vehicle seat having a backrest whose inclination can be adjusted, the fitting comprising: a disc-shaped unit comprising a first fitting part and a second fitting part, wherein there is geared connection between the first fitting part and the second fitting part so that the first fitting part can roll relative to the second fitting part;a clamping ring that holds the disk-shaped unit together;a rotatably mounted eccentric for being driven, and for causing the first fitting part to roll relative to the second fitting part in response to the eccentric being driven;a driver for driving the eccentric so that the eccentric causes the first fitting part to roll relative to the second fitting part;a third fitting part for guiding movement of the backrest, wherein the third fitting part is mounted so that the third fitting part can be freely pivoted relative to the first fitting part during an unlocked state of the third fitting part, andthe third fitting part moves with the first fitting part when the first fitting part rolls relative to the second fitting part during an unlocked state of the third fitting part.

25. The fitting according to claim 24, wherein: a detent element at least indirectly locks the third fitting part to the first fitting part during the locked state of the third fitting part, andthe detent element is formed separately from the first fitting part.

26. A fitting according to claim 25, wherein: a bearing ring is fixed with respect to the first fitting part, so that the bearing ring moves with the first fitting part when the first fitting part rolls relative to the second fitting part;the third fitting part is pivotably mounted on the bearing ring;the detent element is fixed with respect to, and carried by, the bearing ring;a pivotably mounted pawl is carried by the third fitting part; andthe pawl is in locking engagement with the detent element during the locked state of the third fitting part.

27. The fitting of claim 26 in combination with the vehicle seat, wherein the backrest of the vehicle seat is fixedly attached to the third fitting part so that, by way of the third fitting part: the backrest can be freely pivoted during the unlocked state of the third fitting part, andthe backrest moves with the first fitting part when the first fitting part rolls relative to the second fitting part during a locked state of the third fitting part.