Seat back for vehicles

Patent metadata

Field	Value
Publication number	US-9580000-B2
Application number	US-201414307397-A
Country	US
Kind code	B2
Filing date	Jun 17, 2014
Priority date	Dec 21, 2011
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

A seat back for vehicles including a seat back pad having supporting bodies fixed on a periphery of an opening or a seat frame, or formed integrally with the periphery of the opening by one or multiple-point support, the supporting bodies aligned at predetermined intervals, each arranged in a direction between periphery portions opposite to each other of the opening at a front surface portion formed as a backrest surface for a seated person, the supporting bodies being independent of each other in rod or plate form, each made of a synthetic resin foam having 20 mm or larger in bending deflection amount and 2 to 100 N in load when deflected by 20 mm measured in accordance with a method defined by JIS K7221-2:2006, and having an interspace portion configured such that the supporting bodies are allowed to be deformed by bending in a rear direction.

First claim

What is claimed is:

1. A seat back for vehicles comprising: a seat back pad, the seat back pad having
a plurality of supporting bodies fixed on a periphery of an opening of the seat back pad by one-point support or multiple-point support, or formed integrally with the periphery of the opening by one-point support or multiple-point support, wherein
the plurality of supporting bodies are aligned at predetermined intervals, and each of the plurality of supporting bodies is arranged in a direction between periphery portions opposite to each other of the periphery of the opening on the seat back pad at a front surface portion thereof formed as a backrest surface for a seated person, and wherein
the plurality of supporting bodies are independent of each other, either as rods or as plates, in a substantially horizontal direction between the periphery portions opposite to each other, and each of the plurality of supporting bodies is made of a synthetic resin foam having larger than or equal to 20 mm in bending deflection amount and 2 to 100 N in load when deflected by 20 mm on a load deflection curve, both of which are measured in accordance with a bending deflection method defined by JIS K7221-2:2006, and
an interspace portion formed between the front surface portion and a rear surface portion spaced from a rear side of the front surface portion, the interspace portion configured such that the plurality of supporting bodies are allowed to be deformed by bending in a rear direction into the interspace portion, and wherein the periphery portions of the seat back pad consist of a synthetic resin foam.

2. The seat back for vehicles according to claim 1 , wherein the plurality of supporting bodies have, in front view, a linear shape, a curved shape, or a bent shape formed by combination of straight line strips adjacent to each other, and bent relative to each other at arbitrary angles.

3. The seat back for vehicles according to claim 2 , wherein the seat back pad further has a belt-form sub-supporting body extended on the seat frame on a rear side of the plurality of supporting bodies.

4. The seat back for vehicles according to claim 1 , wherein the seat back pad further has a belt-form sub-supporting body extended on the seat frame on a rear side of the plurality of supporting bodies.

Assignees

• Toyo Seat Co Ltd
• Jsp Corp

Inventors

• Ito Hiroyuki
• Imai Takashi
• Sasaki Hidehiro
• Murata Seishiro
• Shioya Satoru

Classifications

• B60N2/643 Primary

  shape of the back-rests (B60N2/66 takes precedence) · CPC title

• B60N2/64 Primary

  Back-rests {or cushions (B60N2/2222 takes precedence)} · CPC title

• B60N2/686

  Panel like structures · CPC title

• B60N2/7094

  Upholstery springs · CPC title

• B60N2/68

  Seat frames · CPC title