Title:
CHAIR AND CHAIR MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2020022726
Kind Code:
A
Abstract:
To provide a chair whose seat part is inclined in every direction and whose sitting comfort is stable.SOLUTION: A chair has: a seat part 10; and four leg parts 11 which are connected to the seat part 10 below the seat part 10 and in contact with the ground surface. The seat part 10 has an upper side seat part 13 and a lower side seat part 14 positioned below the upper side seat part with intervals. Between the upper side seat part 13 and the lower side seat part 14, four unequal pitch springs 15 and constant pitch springs 16 are provided. Property of the unequal pitch springs 15 is that there are a narrow pitch area to be a first spring constant and a wide pitch area to be a second spring constant greater than the first spring constant. In the state that a person is seated without tilting the upper side seat part 13, setting is performed so that for an assumed user of lowest body weight, balance is achieved in the narrow pitch area and for an assumed user of heaviest body weight, balance is achieved in the wide pitch area.SELECTED DRAWING: Figure 2
Inventors:
IHARA HIDEO
HATTORI KOJI
HATTORI KOJI
Application Number:
JP2019076388A
Publication Date:
February 13, 2020
Filing Date:
April 12, 2019
Export Citation:
Assignee:
IHARA KOGYO KK
International Classes:
A47C3/02; A47C9/02
Attorney, Agent or Firm:
Osamu Fujitani
Akinori Isshiki
Tomohiro Sumiya
Akinori Isshiki
Tomohiro Sumiya