Title:
COLLAPSIBLE CHAIRS
Document Type and Number:
WIPO Patent Application WO/2021/062720
Kind Code:
A1
Abstract:
A collapsible chair includes a pair of hub assemblies (110a, 110b), to which pairs of legs (103a, 104b,103b, 104a) and arms (101a, 102a, 101b, 102b) are rotatably coupled, and a crossbar (105) having end portions, to which each hub assembly (110a, 110b) is rotatably coupled. Each leg (103a, 104b, 103b, 104a) or arm (101a, 102a, 101b, 102b) has one end portion that includes a pinion gear (201a, 202a, 203a, 204a) rotatably coupled to a hub housing (210) of each hub assembly (110a, 110b). Each hub assembly (110a, 110b) includes a hollow rack member (340) having exterior teeth that engage with the pinion gears (201a, 202a, 203a, 204a) of the legs and arms (103a, 104b, 103b, 104a, 101a, 102a, 101b, 102b). Each end portion of the crossbar (105) includes helical or diagonal grooves (442) that mate with corresponding ridges (342) on the interior surface of the hollow rack member (340). As the legs and arms (103a, 104b, 103b, 104a, 101a, 102a, 101b, 102b) are moved towards a collapsed position, the pinion gears (201a, 202a, 203a, 204a) cause the rack members (340) to move outwardly from each other and the grooves (442) cause the hub assemblies (110a, 110b) to rotate in opposite directions such that the arms and legs (103a, 104b, 103b, 104a, 101a, 102a, 101b, 102b) interleave with each other.
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Inventors:
SHEN HONGSHAN (CN)
THOMAS SCOTT (US)
AYALA GERARDO (US)
MOORE BENJAMIN (CN)
GHORMLEY JAMES (CN)
THOMAS SCOTT (US)
AYALA GERARDO (US)
MOORE BENJAMIN (CN)
GHORMLEY JAMES (CN)
Application Number:
PCT/CN2019/109626
Publication Date:
April 08, 2021
Filing Date:
September 30, 2019
Export Citation:
Assignee:
DATAFLY COMMERCE INC (US)
SHEN HONGSHAN (CN)
SHEN HONGSHAN (CN)
International Classes:
A47C4/28
Foreign References:
| CN209090436U | 2019-07-12 | |||
| CN201696574U | 2011-01-05 | |||
| CN207084591U | 2018-03-13 | |||
| CN109770601A | 2019-05-21 | |||
| CN2348181Y | 1999-11-10 | |||
| JP2000229019A | 2000-08-22 | |||
| KR101007505B1 | 2011-01-12 |
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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