Head rest

1. A headrest comprising:

a first headrest pillar and a second headrest pillar;

a stationary unit disposed between the first and the second headrest pillars;

a movable unit movable forward away from the stationary unit and backward toward the stationary unit; and

a linkage linking the stationary unit with the movable unit,

wherein the stationary unit includes a plate-like base fixed to the first and the second headrest pillars and a body attached to a front face of the base, the body being connected to the linkage,

the body includes a plate, a plurality of supports rotatably connecting to and supporting respective linkage segments constituting the linkage and a plurality of fixing portions,

the plate is fixed to the base with the fixing portions,

the supports are integrated with the plate at four corners of the plate so as to protrude forward from the front surface of the plate, and

the supports each have a first size in a widthwise direction of the headrest and a second size in an front-rear direction of the headrest, the first size being greater than the second size.

2. The headrest according to claim 1 , wherein the supports of the stationary unit are disposed on both lateral sides of the stationary unit and the supports of the movable unit are disposed on both lateral sides of the movable unit, and

the linkage segments of the linkage are disposed between the supports on both lateral sides of the stationary unit and between the supports on both lateral sides of the movable unit.

3. The headrest according to claim 1 , wherein the linkage is an X linkage comprising an inside linkage segment and an outside linkage segment rotatably connected to each other via a connecting intersection located in the center of the X linkage, wherein

the supports of the stationary unit are disposed on both upper and lower sides of the stationary unit and the supports of the movable unit are disposed on both upper and lower sides of the movable unit,

the lower support among the supports on the stationary unit and the lower support among the supports on the movable unit are longer than the respective upper supports in length in a vertical direction of the headrest, and

a lower end of the inside linkage segment and a lower end of the outside linkage segment are movable along the respective lower supports in the vertical direction.

4. The headrest according to claim 3 , wherein

the body includes a plurality of fixing portions integrated with the body on at least four corners of the body and fixed to the base, and

upper fixing portions among the fixing portions are disposed at a height substantially equal to a height of the upper support on the stationary unit.

5. The headrest according to claim 3 , wherein

the body includes a plurality of fixing portions integrated with the body on at least four corners of the body and fixed to the base, and

upper fixing portions among the fixing portions are disposed at a height different from a height of the upper support on the stationary unit.

6. The headrest according to claim 5 , wherein the stationary unit further includes an integrated reinforcing rib between the upper and the lower supports, and the upper fixing portions among the fixing portions are disposed at a height substantially equal to a height of the reinforcing rib.

7. The headrest according to claim 4 , wherein lower fixing portions among the fixing portions are disposed at a height substantially equal to a height of the lower support on the stationary unit.

8. The headrest according to claim 1 , wherein the supports on the stationary unit are disposed behind a virtual line joining axes of the first and the second headrest pillars.

9. The headrest according to claim 1 , wherein the base is composed of a metal and the body is composed of a resin.

10. The headrest according to claim 1 , wherein the supports of the stationary unit are disposed on both upper and lower sides of the stationary unit and the fixing portion is disposed between the supports disposed on the upper and lower sides.