Chair

Patent metadata

Field	Value
Publication number	US-2016100691-A1
Application number	US-201314436873-A
Country	US
Kind code	A1
Filing date	Apr 25, 2013
Priority date	Oct 18, 2012
Publication date	Apr 14, 2016
Grant date	—

Abstract

A chair includes: a leg body; a backrest supporting body supported by the leg body; a backrest rear supporting member supported by the backrest supporting body; and a backrest that is supported by the backrest rear supporting member and supports the back of a user. The backrest has: a flexible upholstering material configured to receive the back of the user and is displaceable depending on the back; and a pair of vertical frame sections that are mounted on the upholstering material, have lower ends connected to the back rest rear section support section, and are separated in a width direction in which twisting deformation is allowed depending on a force applied from the upholstering material.

First claim

1 . A chair comprising:
a leg body; a backrest supporting body supported by the leg body; a backrest rear supporting member supported by the backrest supporting body; and a backrest supported by the backrest rear supporting member and configured to support a back of a user, wherein the backrest has: a flexible upholstering material configured to receive the back of the user and enables displacement depending on the back; and a pair of vertical frame sections that are mounted on the upholstering material, have lower ends connected to the back rest rear section support section, and are separated in a width direction in which twisting deformation is allowed depending on a force applied from the back of the user.

2 . The chair according to claim 1 , wherein the backrest rear supporting member has a pair of connection segments that are mutually separated outward from the middle in the width direction toward an upper side from a lower side, have upper ends connected to the pair of vertical frame sections, and enable displacement along with twist of the vertical frame sections.

3 . The chair according to claim 1 wherein the pair of vertical frame sections each have a lower material that is inclined to tilt forward toward the upper side and an upper material that is connected to the lower material and enables twisting deformation with a force applied from the back of the user.

4 . The chair according claim 1 wherein the vertical frame sections are curved to become convex forward.

5 . The chair according to claim 1 , wherein:
the backrest has an upper frame section on which the upholstering material is mounted and which is connected with the backrest rear supporting member; and the pair of vertical frame sections, which are connected to both ends of the upper frame section in the width direction and on which the upholstering material is mounted, enable elastic deformation depending on a force applied from the upholstering material.

6 . The chair according to claim 5 , wherein the vertical frame sections each have a lower material and an upper material that is connected to an upper end of the lower material and enables elastic deformation with the force applied from the upholstering material.

7 . The chair according to claim 6 , wherein the lower material is formed to be gradually inclined forward toward an upper side.

8 . The chair according to claim 5 wherein the vertical frame sections are curved to become convex forward.

9 . The chair according claim 5 wherein the backrest rear supporting member is curved to become convex backward.

10 . The chair according to claim 5 wherein the backrest rear supporting member has upper connection sections that are disposed to be gradually widened outside in the width direction toward the upper side and support both ends of the upper frame section in the width direction.

11 . The chair according to claim 5 wherein the backrest rear supporting member and the vertical frame section are integrally formed in an annular shape when viewed from the side.

12 . The chair according to claim 10 , wherein:
the backrest rear supporting member has:
a lower connection section that is connected to the backrest supporting body; and
a deformable section that extends upward from the lower connection section and enables elastic deformation according to a load applied from the back of the user to the backrest;
the upper connection sections are formed in a V shape so as to be separated from each other toward the upper side from an upper end of the deformable section and are configured as a pair of connection segments having upper ends connected to the vertical frame section;
the lower connection section, the deformable section, one of the pair of connection segments, and one of the pair of vertical frame sections constitute a first annular section having an annular shape when viewed from the side;
the lower connection section, the deformable section, the other of the pair of connection segments, and the other of the pair of vertical frame sections constitute a second annular section having an annular shape when viewed from the side; and
the first annular section and the second annular section are connected by the lower connection section and the deformable section and are integrally formed.

13 . The chair according to claim 12 , wherein the backrest rear supporting member has:
a lower connection section that is connected to the backrest supporting body; a deformable section that extends upward from the lower connection section and enables elastic deformation according to a load applied from the back of the user to the backrest; and an upper connection section that extends upward from an upper end of the deformable section and is connected with the backrest at an upper end thereof.

14 . The chair according to claim 13 , wherein the upper connection section is formed to be gradually inclined forward toward an upper side.

15 . The chair according to claim 13 wherein the upper connection section has a pair of connection segments that are connected with the deformable section at lower ends thereof, are formed in a V shape so as to be separated from each other toward the upper side, and have upper ends connected to the backrest.

16 . The chair according to claim 13 wherein the backrest has:
a lower material whose lower end is connected to the lower connection section and which is formed to be gradually inclined forward toward the upper side; and
an upper material that is connected to the upper connection section at an upper end thereof.

17 . The chair according to claim 16 , wherein the backrest has a flexible upholstering material whose lower portion is connected to the lower material, whose upper portion is connected to the upper material, which receives the back of the user, and which enables deformation depending on the back.

18 . The chair according to claim 1 wherein the pair of vertical frame sections each have a lower material that is inclined to tilt forward toward the upper side and an upper material that is connected to the lower material and enables twisting deformation with a force applied from the back of the user.

Assignees

• Masunaga Hiroshi
• Igarashi Ryo
• Izawa Syouichi
• Okamura Corp

Inventors

• Masunaga Hiroshi
• Igarashi Ryo
• Izawa Syouichi

Classifications

• A47C7/462

  adjustable by mechanical means · CPC title

• A47C7/46

  with special, e.g. adjustable {, lumbar region support} profile; "Ackerblom" profile chairs · CPC title

• A47C7/40

  for the back · CPC title

• A47C1/03277

  with bar or leaf springs · CPC title

• A47C7/44 Primary

  with elastically-mounted frame · CPC title