Abstract: A height adjusting device includes an attachment bolt, an adjuster, a female screw portion, and a circular groove. The adjuster 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. The female screw portion is formed in a piece of furniture. The attachment bolt is screwable into the female screw portion. A circular groove is formed around the female screw portion. The adjuster includes a brake portion protruding from the flange portion in a rotation axis direction of the adjuster. When inserted into the circular groove, the brake portion abuts a wall surface of the circular groove and is at least partially deformed thereby to bias the wall surface, resulting in suppression of rotation of the adjuster.

Abstract: A desk includes a top panel and at least one leg portion. At least one of the at least one leg portion includes a pole-shaped leg pole that supports the top panel and a leg support that has at least a part abutting a floor surface and is attached to the leg pole so as to support the leg support. The leg support includes, as devices to connect with the leg pole, a pair of sandwiching portions that abut the leg pole and are capable of sandwiching the leg pole therebetween and a fastening device that fastens and connects the pair of sandwiching portions in a state where the leg pole is sandwiched by the pair of sandwiching portions.

Abstract: A lock device for preventing rotation of a rotating portion of a piece of furniture includes a positioning device, an engaged portion, an engaging portion, a biasing element, and an operation lever. The engaging portion is rotatable around an axis parallel to a rotating axis of the rotating portion, and is engageable with the engaged portion when the rotating portion is in a position positioned by the positioning device. The engaging portion includes at least one engaging surface engageable with the engaged portion. The engaged portion includes at least one engaged surface engageable with the engaging portion. The at least one engaging surface is rotated while being moved in a direction of departing from the engaged surface in accordance with a rotation of the engaging portion by the operation lever.

Abstract: A movable desk includes a cam, an elevation member, a brake portion, and a guide portion. The cam rotates in accordance with a rotation of the top panel. The elevation member, including one end swingably connected to the cam, is moved downward when the top panel is rotated to the in-use position, while being moved upward when the top panel is rotated to the storage position. The brake portion is swingably connected to the elevation member and contacts a floor surface when the top panel is in the in-use position thereby fixing at least one leg portion with respect to the floor surface. The guide portion abuts the brake portion thereby to bring the brake portion into contact with a predetermined position of the floor surface.