Headrest having engaging members and locking mechanism with engaging portions

Patent metadata

Field	Value
Publication number	US-10427573-B2
Application number	US-201415105382-A
Country	US
Kind code	B2
Filing date	Dec 17, 2014
Priority date	Dec 18, 2013
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A headrest includes a right headrest pillar and a left headrest pillar apart from the right headrest pillar, a fixed frame disposed on the headrest pillars, a movable frame coupled to the fixed frame with a movable mechanism, and a front-back locking mechanism locking and unlocking a front-back movement of the movable frame relative to the fixed frame. The movable frame is movable in the front-back direction relative to the fixed frame. The front-back locking mechanism includes a plurality of engaged members disposed outside the right and left headrest pillars in a width direction thereof and a locking member having a plurality of engaging portions to be respectively engaged with the engaged members to lock the movement of the movable frame.

First claim

The invention claimed is:

1. A headrest comprising:
a right headrest pillar and a left headrest pillar apart from the right headrest pillar;
a fixed frame disposed on the headrest pillars;
a movable frame coupled to the fixed frame with a movable mechanism, the movable frame being movable in a front-back direction relative to the fixed frame; and
a front-back locking mechanism locking and unlocking a front-back movement of the movable frame relative to the fixed frame,
wherein the front-back locking mechanism comprises:
a plurality of engaged members disposed outside the right and left headrest pillars in a width direction thereof; and
a locking member having a plurality of engaging portions to be respectively engaged with the engaged members to lock the movement of the movable frame,

the fixed frame comprises a holder holding the locking member, the holder being disposed on a rear face of the fixed frame, and
the holder is disposed in the rear of at least the right and left headrest pillars.

2. The headrest according to claim 1 , wherein
the movable frame comprises a front cover and a rear cover constituting a case having an internal cavity when assembled,
at least tops of the right and left headrest pillars, the fixed frame, the movable mechanism, and the front-back locking mechanism are disposed in the internal cavity defined by the front cover and the rear cover, and
the engaged members are disposed in the front-back direction and carried by the front cover and the rear cover.

3. The headrest according to claim 1 , wherein
the locking member is composed of metal and disposed in the vicinity of the fixed frame,
a bumper is disposed between the locking member and the fixed frame, and
the bumper comes into contact with the fixed frame in cooperation with movement of the locking member toward the fixed frame.

4. The headrest according to claim 3 , wherein
the locking member comprises:
an elongate held portion held by the fixed frame and extending along a width of the fixed frame;
the plurality of engaging portions extending in parallel with the held portion and engaged with the engaged members; and
a plurality of coupling portions, each coupling portion disposed between one end of the held portion and one end of the corresponding engaging portion,

the locking member is disposed on the fixed frame so as to surround the fixed frame, and
the bumper is mounted on the locking member from a side of the fixed frame toward outside.

5. The headrest according to claim 3 , wherein
the front-back locking mechanism is pivotally held by the movable frame and comprises a pivoting operating member for operating the locking member, and
the bumper is configured to increase a area of contact between the locking member and the pivoting operating member.

6. The headrest according to claim 1 , wherein
the fixed frame comprises:
pillar inserting holes formed at horizontal ends of the fixed frame and receiving the right and left headrest pillars vertically extending therethrough; and
slits formed vertically in at least one of front and rear faces of the fixed frame and in communication with the pillar inserting holes, and

the right and left headrest pillars are each provided with a pillar retainer slidably disposed through the slit when the headrest pillar is inserted into the corresponding pillar inserting hole.

7. The headrest according to claim 1 , wherein
the front-back locking mechanism comprises an urging member that urges the engaging portions toward the engaged members, and
the fixed frame comprises:
a receiver being open toward a front face of the fixed frame and accommodating the corresponding urging member; and
a retainer regulating a frontward movement of the corresponding urging member accommodated in the receiver.

8. A vehicle seat comprising:
the headrest according to claim 1 .

9. The headrest according to claim 1 , wherein the fixed frame comprises a stopper disposed on the rear face of the fixed frame and being in contact with the locking member along a mounting direction of the locking member on the holder to regulate movement of the locking member in the opposite direction of the mounting direction.

10. The headrest according to claim 1 , comprising a link mechanism having a first link and a second link pivotally connected with a shaft, the first link and the second link each connecting the fixed frame and the movable frame, wherein
the shaft is inserted through a through-hole formed in at least one of the first link and the second link, and
a movement regulator is disposed on a side face of one of the first link and the second link, the shaft being inserted from the side face and the movement regulator regulating a movement of the shaft in an axial direction thereof.

11. A headrest comprising:
a right headrest pillar and a left headrest pillar apart from the right headrest pillar;
a fixed frame disposed on the headrest pillars;
a movable frame coupled to the fixed frame with a movable mechanism, the movable frame being movable in a front-back direction relative to the fixed frame; and
a front-back locking mechanism locking and unlocking a front-back movement of the movable frame relative to the fixed frame,
wherein the front-back locking mechanism comprises:
a plurality of engaged members disposed outside the right and left headrest pillars in a width direction thereof; and
a locking member having a plurality of engaging portions to be respectively engaged with the engaged members to lock the movement of the movable frame,

the locking member is composed of metal and disposed in the vicinity of the fixed frame,
a bumper is disposed between the locking member and the fixed frame, and
the bumper comes into contact with the fixed frame in cooperation with the movement of the locking member toward the fixed frame.

12. The headrest according to claim 11 , wherein
the movable frame comprises a front cover and a rear cover constituting a case having an internal cavity when assembled,
at least tops of the right and left headrest pillars, the fixed frame, the movable mechanism, and the front-back locking mechanism are disposed in the internal cavity defined by the front cover and the rear cover, and
the engaged members are disposed in the front-back direction and carried by the front cover and the rear cover.

13. The headrest according to claim 11 , wherein
the locking member comprises:
an elongate held portion held by the fixed frame and extending along a width of the fixed frame;
the plurality of engaging portions extending in parallel with the held portion and engaged with the engaged members; and
a plurality of coupling portions, each coupling portion disposed between one end of the held portion and one end of the corresponding engaging portion,

the locking member is disposed on the fixed frame so as to surround the fixed frame, and
the bumper is mounted on the locking member from a side of the fixed frame toward outside.

14. The headrest according to claim 11 , wherein
the front-back locking mechanism is pivotally held by the movable frame and comprises a pivoting operating member for operating the locking member, and
the bumper is configured to increase an area of contact between the locking member and the pivoting operating member.

15. The headrest according to claim 11 , wherein
the fixed frame comprises:
pillar inserting holes formed at horizontal ends of the fixed frame and receiving the right and left headrest pillars vertically extending therethrough; and
slits formed vertically in at least one of front and rear faces

Assignees

• Ts Tech Co Ltd

Inventors

• Ishihara Kazunori
• Mishiba Kazuhiro
• Nakano Yuji
• Izawa Hiroshi

Classifications

• B60N2/865 Primary

  providing a fore-and-aft movement with respect to the occupant's head · CPC title

• B60N2/829

  characterised by their adjusting mechanisms, e.g. electric motors · CPC title