Chair

• US 20030151287A1
• Filed: 01/13/2003
• Published: 08/14/2003
• Est. Priority Date: 02/08/2002
• Status: Active Grant

• Current Assignee: Kokuyo Company Limited, Takano Co., Ltd.
• Original Assignee: Kokuyoco Limited
• Inventors: Ueda, Nobuyuki, Kinoshita, Yojiro, Aoyagi, Toru, Horiki, Toshiyuki
• Granted Patent: US 7,134,722 B2
• Time in Patent Office: Days
• US Class Current: 297/301.1
• CPC Class Codes: A47C 3/02 Rocking chairs specially for children A47D13/10
• CPC Class Codes: A47C 7/402 adjustable in height
• CPC Class Codes: A47C 7/462 adjustable by mechanical means

Abstract

A chair that can transform a shape of a backrest with a simple arrangement is provided.

The chair comprises a backrest 7 wherein the backrest 7 is made transformable, further comprises a backrest receiving member 54 that supports a bottom end portion of the backrest 7 in a slidable manner toward a certain direction and an operating lever K1 to select and fix a position at which the backrest 7 is slid and the backrest 7 can be transformed in compliance with the position fixed by the operating lever K1.

Claims

1. A chair comprising a backrest wherein the backrest is arranged transformably, a backrest supporting portion that supports at least either a top end portion or a bottom end portion of the backrest in a slidable manner toward a certain direction and an operating portion that selects and fixes a position at which the backrest is slid are provided and the backrest can be transformed in compliance with the position fixed by the operating portion.

2. The chair described in claim 1 wherein the top end portion of the backrest is supported in a rotatable manner around a horizontal axis, and the bottom end portion of the backrest is supported in a slidable manner by a backrest bottom supporting portion and a position at which the bottom end portion of the backrest is slid can be selected and fixed by a bottom operating portion.

3. The chair described in claim 1 wherein the bottom end portion of the backrest is supported in a slidable manner by a backrest bottom supporting portion and a position at which the bottom end portion of the backrest is slid can be selected and fixed by a bottom operating portion, and the top end portion of the backrest is supported in a slidable manner by a backrest top supporting portion and a position at which the top end portion of the backrest is slid can be selected and fixed by a top operating portion.

4. The chair described in claim 1 wherein the top end portion of the backrest is fixed and the bottom end portion of the backrest is supported in a slidable manner by a backrest bottom supporting portion and a position at which the bottom end portion of the backrest is slid can be selected and fixed by a bottom operating portion.

5. The chair described in claim 1 wherein the bottom end portion of the backrest is supported in a rotatable manner around a horizontal axis and the top end portion of the backrest is supported in a slidable manner by a backrest top supporting portion and a position at which the top end portion of the backrest is slid can be selected and fixed by a top operating portion.

6. The chair described in claim 1 wherein the bottom end portion of the backrest is fixed and the top end portion of the backrest is supported in a slidable manner by a backrest top supporting portion and a position at which the top end portion of the backrest is slid can be selected and fixed by a top operating portion.

7. The chair described in claim 1 through claim 6 wherein a sliding movement toward a predetermined direction is a movement along a line that makes a right angle to a width of the backrest.

8. The chair described in claim 1 through claim 6 wherein a sliding movement toward a predetermined direction is a movement along an arc on a plane that makes a right angle to a width of the backrest.

9. The chair described in claim 1 through claim 8 wherein the backrest transforms with the position of the lumber support projected or depressed back and forth in compliance with the position operated by the operating portion.

10. The chair described in claim 1 through claim 8 wherein the backrest transforms with the position of the lumber support projected or depressed back and forth or up and down in compliance with the position operated by the operating portion.

11. The chair described in claim 1 through 10 wherein the backrest transforms its shape of S-curve smoothly in compliance with the position operated by the operating portion.

12. The chair described in claim 1 through 11 wherein the backrest comprises a transformable backrest body that locates at a position that contacts a back of a seated person and a backrest reinforcing member that supports a part of the backrest body from its back side and a portion that is not supported by the backrest reinforcing member can be transformed.