Headrest

1 . A headrest, comprising: an adjustment device; a retaining device; and a head contact part movable between a front and a rear position by the adjustment device, wherein the adjustment device comprises at least one link that forms at least one joint with the retaining device and at least one joint with the head contact part, wherein the adjustment device further comprises an adjustment housing that at least partially covers the at least one link, wherein the adjustment housing is motion-connected to the retaining device so that the adjustment device follows a movement of the at least one link, wherein the adjustment housing is configured as a unit made up of a single part or multiple parts fixed to each other, wherein the unit forms a joint with the retaining device, and wherein the unit forms a joint with the head contact part so that the adjustment housing is carried along by the head contact part.

2 . The headrest according to claim 1 , wherein the adjustment housing has at least two housing parts including a first housing part that is movable relative to a second housing part.

3 . The headrest according to claim 2 , wherein at least one of the housing parts is connected to the at least one link.

4 . The headrest according to claim 2 , wherein the first housing part forms a first joint and the second housing part forms a second joint with the retaining device.

5 . The headrest according to claim 2 , wherein at least one of the housing parts is connected to another of the housing parts.

6 . The headrest according to claim 1 , wherein the joint is a translational guide and rotary guide.

7 . The headrest according to claim 2 , wherein at least one of the housing parts is configured to be cup-like.

8 . The headrest according to claim 1 , wherein the adjustment device comprises at least two links that each form a four-link joint with the retaining device and the head contact.

9 . A headrest, comprising: an adjustment device; a retaining device; and a head contact part movable between a front and a rear position by the adjustment device, wherein the adjustment device comprises at least one link that forms at least one joint with the retaining device and at least one joint with the head contact part, wherein the adjustment device further comprises an adjustment housing that at least partially covers the at least one link, wherein the adjustment housing is motion-connected to the retaining device so that the adjustment device follows a movement of the at least one link, wherein the adjustment housing is configured as a unit, wherein the unit forms a joint with the retaining device, and wherein the unit forms a joint with the head contact part, wherein the at least one link includes a first link and a second link, wherein the first housing part is connected to the first link and the second housing part is connected to the second link, wherein the housing parts are movable relative to one another.

10 . A headrest, comprising: an adjustment device; a retaining device; and a head contact part movable between a front and a rear position by the adjustment device, wherein the adjustment device comprises at least one link that forms at least one joint with the retaining device and at least one joint with the head contact part, wherein the adjustment device further comprises an adjustment housing that at least partially covers the at least one link, wherein the adjustment housing is motion-connected to the retaining device so that the adjustment device follows a movement of the at least one link, wherein the adjustment housing is configured as a unit, wherein the unit forms a joint with the retaining device, and wherein the unit forms a joint with the head contact part, wherein the adjustment housing has at least two housing parts including a first housing part that is movable relative to a second housing part, wherein the first housing part is securely connected to the at least one link and the second housing part forms a joint with the retaining device or with the head contact part, wherein the second housing part is connected to the first housing part.

11 . A headrest, comprising: an adjustment device; a retaining device; and a head contact part movable between a front and a rear position by the adjustment device, wherein the adjustment device comprises at least one link that forms at least one joint with the retaining device and at least one joint with the head contact part, wherein the adjustment device further comprises an adjustment housing that at least partially covers the at least one link, wherein the adjustment housing is motion-connected to the retaining device so that the adjustment device follows a movement of the at least one link, wherein the adjustment housing is configured as a unit, wherein the unit forms a joint with the retaining device, and wherein the unit forms a joint with the head contact part, wherein the head contact part has a head contact housing that at least partially overlaps the adjustment housing and is movable relative to the adjustment housing.

12 . A headrest, comprising: an adjustment device; a retaining device; and a head contact part movable between a front and a rear position by the adjustment device, wherein the adjustment device comprises at least one link that forms at least one joint with the retaining device and at least one joint with the head contact part, wherein the adjustment device further comprises an adjustment housing that at least partially covers the at least one link, wherein the adjustment housing is motion-connected to the retaining device so that the adjustment device follows a movement of the at least one link, wherein the at least one link of the adjustment device comprises two links, wherein the two links are a front link and a rear link, wherein the housing is formed by a front housing part and a rear housing part that are movable relative to one another, and wherein the front housing part is attached to the front link and the rear housing part is attached to the rear link.