US 2018/0008046 A1Published application

Reaction force mechanism and chair using same

AssigneeOkamura Corporation

InventorHiroshi MASUNAGA

Life of this patent

Estimating the term…

Loading patent…

Abstract

A pivot shaft (10) which is a first shaft member coupled to a supporting member, an inner cylinder (12) which is a second shaft member coupled to a supported member, and an outer cylinder (14) which is a third shaft member are disposed to be approximately coaxial with each other and disposed radially in multiple layers. The pivot shaft (10) and the inner cylinder (12) are coupled to each other through a first rubber-like elastic member (11), and the inner cylinder (12) and the outer cylinder (14) are coupled to each other through a second rubber-like elastic member (13). The total reaction force is increased by restricting the rotation of the outer cylinder (14) by means of an operating pin (19) which is a reaction force adjusting part and thereby adding a reaction force resulting from the second rubber-like elastic member (13) to a base reaction force resulting from the first rubber-like elastic member (11).

Claims11

Dependent claims

A reaction force mechanism which is provided between a supporting member and a supported member supported by the supporting member to be tiltable and is capable of adjusting a reaction force resulting from the tilting movement of the supported member with respect to the supporting member, comprising:

a plurality of shaft members including a first shaft member connected to the supporting member, a second shaft member connected to the supported member and a third shaft member other than the first shaft member and the second shaft member and disposed coaxially and radially in multiple layers;
a plurality of biasing members configured to connect the shaft members adjacent to each other in a radial direction;
and
a reaction force adjusting part configured to increase the reaction force against a base reaction force resulting from the biasing member interposed between the first shaft member and the second shaft member by restricting rotation of the third shaft member with respect to the first shaft member or the second shaft member.

1 more element

Dependencies are inferred from the claim text.