Link mechanism for a chair and a chair
AssigneeOki Electric Industry Co., Ltd.
InventorZenroh Fukai
Life of this patent
Estimating the term…
Abstract
There is provided a link mechanism for a chair that is a link mechanism that is used at a chair, the link mechanism for a chair having: a first link whose one end is connected to a bottom surface of a link that supports a seat surface portion of the chair; a second link whose one end is connected to another end of the first link; a first joint portion rotatably connecting the first link and the second link; a second joint portion provided at another end of the second link; and a first elastic resistance unit imparting elasticity in a rotating direction to the second joint portion.
Claims8
A chair comprising:
- a seat surface portion;
- a back surface portion;
- a first link supporting the seat surface portion;
- a second link supporting the back surface portion;
- a third link having one end connected to the second link;
- a fourth link connected to another end of the third link;
- a first joint portion rotatably connecting the third link and the fourth link;
- a second joint portion rotatably connecting the first link and the fourth link;
- a third joint portion rotatably connecting the third link and the second link;
- a first elastic resistance unit imparting repulsion elasticity to the third link;
- and
- a second elastic resistance unit imparting elasticity in a rotating direction to the second joint portion.
A chair, comprising:
- a seat surface portion;
- a back surface portion;
- a first link supporting the seat surface portion;
- a second link supporting the back surface portion;
- a third link having one end connected to the second link;
- a fourth link connected to another end of the third link;
- a first joint portion rotatably connecting the third link and the fourth link;
- a second joint portion rotatably connecting the first link and the fourth link;
- a third joint portion rotatably connecting the third link and the second link;
- a first elastic resistance unit imparting repulsion elasticity to the third link;
- and
- a second elastic resistance unit imparting elasticity in a rotating direction to the first joint portion.
Dependencies are inferred from the claim text.