Title:
CHAIR
Document Type and Number:
WIPO Patent Application WO/2023/171795
Kind Code:
A1
Abstract:
A spring member (60) is provided such that the biasing direction thereof is directed to the front-rear direction and includes a front-side engagement portion (62) provided on a spring front portion and a rear-side engagement portion (63) provided on a spring rear portion. A seat (5) includes a front-side spring seat portion (55) which engages with the front-side engagement portion (62). A backrest (20) or a support structure (41) includes a rear-side spring seat portion (65) which engages with the rear-side engagement portion (63) and an adjustment portion (70) which adjusts, together with the rear-side spring seat portion (65), the position of the rear-side engagement portion (63) in the up-down direction. An upper limit position (T1) of the rear-side engagement portion (63) of the spring member (60) adjusted by the adjustment portion (70) is above an axial center (C1) about which the backrest (20) is rotatably supported by the support structure (41).
Inventors:
MASUNAGA HIROSHI (JP)
Application Number:
PCT/JP2023/009297
Publication Date:
September 14, 2023
Filing Date:
March 10, 2023
Export Citation:
Assignee:
OKAMURA CORP (JP)
International Classes:
A47C7/44; A47C3/026
Domestic Patent References:
| WO2010056838A1 | 2010-05-20 |
Foreign References:
| JP2003310378A | 2003-11-05 | |||
| JP2000184927A | 2000-07-04 | |||
| JP2000139605A | 2000-05-23 | |||
| JPH11253264A | 1999-09-21 | |||
| JPH06261818A | 1994-09-20 | |||
| JP2003009999A | 2003-01-14 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi (JP)
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