Patent ID: 7798455

Claim:
A height adjusting device for adjusting a height of a piece of furniture from a floor surface, comprising: an attachment bolt; an adjuster that includes a flange portion operable from an outside and is fixed to the attachment bolt so as to be rotatable integrally with the attachment bolt; a female screw portion which is formed from a surface of the furniture facing the floor surface toward an inside of the furniture and into which the attachment bolt is screwable; and a circular groove which is formed in a concentric manner around the female screw portion and into which a part of the adjuster is inserted when the attachment bolt is screwed, wherein the adjuster includes a brake portion protruding from the flange portion in a rotation axis direction of the adjuster, and wherein the brake portion is configured such that, when the brake portion is inserted into the circular groove, at least a part of the brake portion abuts a wall surface of the circular groove at least in a range where the attachment bolt and the female screw portion are screwed together and at least a part of the brake portion is deformed thereby to bias the wall surface, resulting in suppression of rotation of the adjuster.