Seat back

Patent metadata

Field	Value
Publication number	US-11059401-B2
Application number	US-202016851322-A
Country	US
Kind code	B2
Filing date	Apr 17, 2020
Priority date	Apr 25, 2019
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

A seat back configured to support a back of a seated person includes a back frame constituting an internal framework; and an elastic mat fitted to the back frame so as to cover the back frame from a front side, the elastic mat having a planar shape and being configured to elastically support the back of the seated person. The back frame includes a frame body and a support wire that protrudes forward from the frame body. The elastic mat includes a main support portion configured to support the back of the seated person, and a band portion that extends from a back surface of the main support portion, the band portion being wound around the support wire. The elastic mat has a through-hole through which a head at a distal end of the wound band portion is inserted such that the head is snap-fitted in the through-hole.

First claim

What is claimed is:

1. A seat back configured to support a back of a seated person, the seat back comprising:
a back frame that constitutes an internal framework; and
an elastic mat that is fitted to the back frame so as to cover the back frame from a front side, the elastic mat having a planar shape and being configured to elastically support the back of the seated person, wherein
the back frame includes a frame body and a support wire that protrudes forward from the frame body,
the elastic mat includes a main support portion configured to support the back of the seated person, and a band portion that extends from a back surface of the main support portion, the band portion being wound around the support wire, and
the elastic mat has a through-hole through which a head at a distal end of the wound band portion is inserted such that the head is snap-fitted in the through-hole.

2. The seat back according to claim 1 , wherein:
the support wire is bent in a U-shape;
opposite end portions of the U-shape serve as fixed portions that are fixed to the frame body; and
an intermediate portion of the U-shape serves as an engagement portion that extends in an in-plane direction of the elastic mat, the band portion being wound around the engagement portion.

3. The seat back according to claim 1 , wherein the elastic mat is made of a polyester-based thermoplastic elastomer, the elastic mat including a protruding portion that protrudes rearward so as to have a flange shape, and the protruding portion being provided in a peripheral edge portion of the elastic mat.

4. The seat back according to claim 1 further comprising:
a backboard that covers the back frame from behind, wherein in a peripheral portion of the seat back, a peripheral edge portion of the backboard and the peripheral edge portion of the elastic mat are fitted to and combined with each other in a box shape so as to enclose the back frame.

5. The seat back according to claim 1 , wherein the support wire includes a support portion that contacts an eaves portion from below so as to support the elastic mat, the eaves portion protruding rearward from an upper edge portion of the elastic mat.

Assignees

• Toyota Boshoku Kk
• Toyota Motor Co Ltd
• Inoue Mtp Kk

Inventors

• Nakamura Genzo
• Maki Hiroshi
• Nakamura Toshio
• Ueda Katsuya
• Yoshida Yasuhiro
• Kamiya Kentaro

Classifications

• B61D33/0014

  Seat frames (B61D33/0092 takes precedence) · CPC title

• B61D33/0035

  Cushions or the like; Covers · CPC title

• B61D33/0078

  adjustably mounted · CPC title

• B63B2029/043

  Seats; Arrangements thereof on vessels · CPC title

• B60N2/585 Primary

  by buckle passages · CPC title