Support assembly and corresponding seat structure

1. A support assembly having a first support region with adjustable degree of support and a second support region with adjustable degree of support, comprising:

a support member for incorporation into a seat frame,

a first adjustment arrangement for adjusting the degree of support in the first support region, the first adjustment arrangement comprising a first Bowden cable arrangement,

a second adjustment arrangement for adjusting the degree of support in the second support region, the second adjustment arrangement comprising a second Bowden cable arrangement, wherein the first Bowden cable arrangement and the second Bowden cable arrangement each comprise a wire guided in a sheath,

first attachment means for attaching the sheath of the first Bowden cable arrangement to one side of the support member in the first support region,

second attachment means for attaching the sheath of the first Bowden cable arrangement to the opposite side of the support member in the first support region,

third attachment means for attaching the sheath of the second Bowden cable arrangement to one side of the support member in the second support region,

fourth attachment means for attaching the sheath of the second Bowden cable arrangement to the opposite side of the support member in the second support region,

an actuator coupled to the first adjustment arrangement and to the second adjustment arrangement,

wherein the actuator is configured to simultaneously act on the first adjustment arrangement and on the second adjustment arrangement in opposite directions,

wherein a first end portion of the wire of the first Bowden cable arrangement extends from the first attachment means and is adapted to be connected to the seat frame, and

wherein a first end portion of the wire of the second Bowden cable arrangement extends from the third attachment means and is adapted to be connected to the seat frame.

2. The support assembly according to claim 1 ,

wherein the first attachment means and the fourth attachment means are located on the same side of the support member and the second attachment means and the third attachment means are located on the same side of the support member.

3. The support assembly according to claim 2 ,

wherein the support assembly comprises a member integrally forming the first attachment means and the fourth attachment means and/or a member integrally forming the second attachment means and the third attachment means.

4. The support assembly according to claim 2 ,

wherein the sheaths of the first Bowden cable arrangement and of the second Bowden cable arrangement each comprise a first portion and a second portion which are separated from each other,

wherein for the first Bowden cable arrangement the first portion of the sheath extends from the first attachment means to the actuator and the second portion of the sheath extends from the actuator to the second attachment means,

wherein for the second Bowden cable arrangement the first portion of the sheath extends from the third attachment means to the actuator and the second portion of the sheath extends from the actuator to the fourth attachment means,

wherein a second end portion of the wire of the first Bowden cable arrangement extends from the second attachment means, and

wherein a second end portion of the wire of the second Bowden cable arrangement extends from the fourth attachment means.

5. The support assembly according to claim 4 ,

wherein the actuator comprises a slide member which is slidably coupled to a fixed member of the actuator, the first portion of the sheath of the first Bowden cable arrangement and the first portion of the sheath of the second Bowden cable arrangement being coupled to the slide member and the second portion of the sheath of the first Bowden cable arrangement and the second portion of the sheath of the second Bowden cable arrangement being coupled to the fixed member.

6. The support assembly according to claim 5 , wherein the actuator further comprises means for moving the slide member.

7. The support assembly according to claim 1 ,

wherein the sheaths of the first Bowden cable arrangement and the second Bowden cable arrangement each comprise a first portion and a second portion which are separated from each other, wherein for the first Bowden cable arrangement the first portion of the sheath extends from the actuator to a first frame attachment means for attaching the first portion of the sheath to the seat frame and the second portion of the sheath extends from the first attachment means to the second attachment means, and

wherein for the second Bowden cable arrangement the first portion of the sheath extends from the actuator to a second frame attachment means for attaching the first portion of the sheath to the seat frame and the second portion of the sheath extends from the third attachment means to the fourth attachment means.

8. The support assembly according to claim 7 ,

wherein the first frame attachment means is integrally formed with a connecting means for connecting the first end portion of the wire of the second Bowden cable arrangement to the seat frame and/or the second frame attachment means is integrally formed with a connecting means for connecting the first end portion of the wire of the first Bowden cable arrangement to the seat frame.

9. The support assembly according to claim 1 , comprising:

a connecting means for connecting a first end portion of the wire of the first Bowden cable arrangement to the seat frame and/or a connecting means for connecting a first end portion of the wire of the second Bowden cable arrangement to the seat frame, wherein the connecting means has a Z-shape.

10. The support assembly according to claim 1 , comprising:

a connecting structure for connecting a first end portion of the wire of the first Bowden cable arrangement to the seat frame and/or a connecting structure for connecting a first end portion of the wire of the second Bowden cable arrangement to the seat frame, wherein the connecting structure comprises a plastic member configured to be attached to the seat frame.

11. The support assembly according to claim 1 ,

wherein the actuator comprises winding means for winding a wire of the first Bowden cable arrangement and a wire of the second Bowden cable arrangement in opposite directions.

12. The support assembly according to claim 1 ,

wherein the support member comprises two side members and a plurality of transverse members extending between the side members, and

wherein the first attachment means, second attachment means, third attachment means, and fourth attachment means are configured to at least partly embrace the corresponding side member.

13. The support assembly according to claim 12 ,

wherein the first attachment means, the second attachment means, the third attachment means, and the fourth attachment means have at least one clip portion for attachment to the respective side member.

14. The support assembly according to claim 1 , comprising:

a lever member coupled to the actuator,

wherein the lever member comprises a first arm acting on the support member in the first support region and a second arm acting on the support member in the second support region, and

wherein the actuator is coupled to a rotation axis of the lever member.

15. The support assembly according to claim 1 ,

wherein the actuator is provided with a self-blocking capability.

16. A support assembly having a first support region with adjustable degree of support and a second support region with adjustable degree of support, comprising:

a support member for incorporation into a seat frame,

a first adjustment arrangement for adjusting the degree of support in the first support region, the first adjustment arrangement comprising a first Bowden cable arrangement,

a second adjustment arrangement for adjusting the degree of support in the second support region, the second adjustment arrangement comprising a second Bowden cable arrangement, and

an actuator coupled to the first adjustment arrangement and to the second adjustment arrangement,

wherein the actuator is configured to simultaneously act on the first adjustment arrangement and on the second adjustment arrangement in opposite directions, and

wherein an unsheathed portion of a wire of the first Bowden cable arrangement and/or an unsheathed portion of a wire of the second Bowden cable arrangement is covered with a plastic material.

17. A support assembly, having a first support region with adjustable degree of support and a second support region with adjustable degree of support, comprising:

a support member for incorporation into a seat frame,

a first adjustment arrangement for adjusting the degree of support in the first support region, the first adjustment arrangement comprising a first Bowden cable arrangement,

a second adjustment arrangement for adjusting the degree of support in the second support region, the second adjustment arrangement comprising a second Bowden cable arrangement,

an actuator coupled to the first adjustment arrangement and to the second adjustment arrangement, wherein the actuator is configured to simultaneously act on the first adjustment arrangement and on the second adjustment arrangement in opposite directions, and

a wire-length control mechanism coupled to the first Bowden cable arrangement and/or to the second Bowden cable arrangement, wherein the wire-length control mechanism is configured to absorb an excessive length of a wire of the Bowden cable arrangement.

18. The support assembly according to claim 17 ,

wherein the wire-length control mechanism comprises a cylindrical jacket through which the wire of the Bowden cable arrangement is guided,

wherein a first portion of the sheath of the Bowden cable arrangement is fixed to one end of the jacket and the second portion of the sheath of the Bowden cable arrangement is slidably received within the jacket, and

wherein an elastic member is provided between the second portion of the sheath and the jacket so as to bias the second portion of the sheath away from the first portion of the sheath.

19. The support assembly according to claim 17 ,

wherein the wire-length control mechanism comprises an outwardly curved guide surface configured to guide the wire of the Bowden cable arrangement.

20. The support assembly according to claim 17 ,

wherein the wire-length control mechanism comprises a pulley configured to guide the wire of the Bowden cable arrangement.

21. The support assembly according to claim 17 ,

wherein the wire-length control mechanism comprises a slide member which is slidably coupled to a fixed member,

wherein the wire of the Bowden cable arrangement comprises a first portion and a second portion which are separated from each other,

wherein the first portion of the wire is coupled to the actuator and slidably coupled to the slide member,

wherein the second portion of the wire is coupled to the slide member, and

wherein a sliding movement of the first portion of the wire with respect to the slide member is limited by a stop member.

22. The support assembly according to claim 17 ,

wherein the wire-length control mechanism comprises a slide member which is slidably coupled to a fixed member

wherein the wire of the Bowden cable arrangement is slidably coupled to the slide member, and

wherein a sliding movement of the wire with respect to the slide member is limited in one direction by a stop member.