Headrest and vehicle seat provided therewith

Patent metadata

Field	Value
Publication number	US-9387784-B2
Application number	US-201314427902-A
Country	US
Kind code	B2
Filing date	Aug 23, 2013
Priority date	Sep 25, 2012
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

It is obtained a headrest and a vehicle seat provided therewith, capable of obtaining attenuating effect characteristics with respect to oscillation at two resonant frequencies with a simple configuration. A mass body is supported by an elastically deformable first urethane member configuring part of a headrest pad inside a headrest cover of a vehicle seat. Namely, a dynamic damper is configured including the first urethane member and the mass body. The center of gravity of the mass body is set at a position offset in the seat width direction with respect to the elastic center of the first urethane member.

First claim

The invention claimed is:

1. A headrest comprising:
a headrest pad disposed inside a headrest cover, and including an elastically deformable cushion portion configuring part of a dynamic damper; and
a mass body configuring part of the dynamic damper and supported by the cushion portion such that a center of gravity of the mass body is offset from an elastic center of the cushion portion, wherein;
the headrest pad includes a first cushion material configuring the cushion portion and a second cushion material with a higher elastic modulus than the first cushion material;
the second cushion material covers an entire periphery of the first cushion material; and
the center of gravity of the mass body is offset from an elastic center of the first cushion material.

2. The headrest of claim 1 , wherein
the center of gravity of the mass body is set at a position offset in at least one of a seat width direction or a seat up-down direction with respect to the elastic center of the cushion portion.

3. The headrest of claim 2 , wherein
the mass body is formed as a shape with at least one of left-right asymmetry or up-down asymmetry.

4. The headrest of claim 1 , wherein:
the first cushion material includes a first overlap portion set at a position overlapping the mass body as viewed from a front of a seat; and
the second cushion material includes a second overlap portion set at a position overlapping the mass body and the first overlap portion as viewed from the front of the seat.

5. The headrest of claim 1 , wherein
the first cushion material covers the entire periphery of the mass body.

6. A vehicle seat comprising:
a seat cushion on which an occupant can sit;
a seatback supported at a rear end portion of the seat cushion; and
the headrest of claim 1 , disposed at an upper end portion of the seatback to support the head of the occupant.

Assignees

• Toyota Motor Co Ltd

Inventors

• Haga Kouichiro
• Ishimoto Manabu

Classifications

• B60N2/80

  Head-rests · CPC title

• B60N2002/899

  characterised by structural or mechanical details not otherwise provided for · CPC title

• B60N2/888

  with arrangements for protecting against abnormal g-forces, e.g. by displacement of the head-rest · CPC title

• F16F7/108 Primary

  on plastics springs · CPC title

• F16F7/10

  using inertia effect (F16F13/108, F16F13/22, F16F15/10, F16F15/22 take precedence; stabilising vehicle bodies by means of movable masses B62D37/04; protection of buildings against vibrations or shocks by mass dampers E04H9/0215; arrangements or devices for damping mechanical oscillations of power lines H02G7/14) · CPC title