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.

Abstract: A linking mechanism includes a convex linking member and a concave linking member, which are provided to each of the chairs aligned in a left and right direction. Each of the linking members is engaged with each other so that linkage of the neighboring chairs is realized. The convex linking member includes a convex-side mounting portion, an extending portion, a notch portion, and an engaging piece. The concave linking member includes a concave-side mounting portion, an engaging projection, and a pair of engaging wall portions.

Abstract: The structure for mounting a seating body according to the present invention includes a seating body mounting portion, a leg mounting portion and a screw. The seating body mounting portion is provided to a back surface of a seating face of a seating body, and has a screw hole. The leg mounting portion is provided to a leg member, and includes a through-bore formed thereon into which a screw shaft can be inserted. The screw fixes the seating body mounting portion and the leg mounting portion. The seating body mounting portion contacts the leg mounting portion on a first region in which the screw hole is formed and on a second region which is spaced from the first region via a groove.

Abstract: A chair includes: a seat body having a seating surface which provides seating to a user; a support device that supports the seat body such that the seat body is movable along a front-to-rear direction of the chair within a predetermined range; and an urging device. When the seat body is located in an area between a front position and a first reference position, the support device supports the seat body such that the seat body is moved to the front position by own weight. When the seat body is located between a rear position and a second reference position, the urging device urges the seat body toward the front position, whereas, when the seat body is located between the second reference position and the front position, the urging device does not urge the seat body.

Abstract: A chair includes a seat body, a front leg, a rear leg, and a leg receiver. The seat body has a seating face for a person to sit on, and a backrest for a person to lean against. One end of the front leg is attached to an underside region which is underside of the seating face of the seat body, in such a manner that the one end of the front leg is capable of being rotated in relation to the seat body. One end of the rear leg is rotatably attached to the seat body at a position closer to a backrest side than a position at which the one end of the front leg is attached. The leg receiver is arranged on a floor surface. The respective other ends of the front leg and the rear leg are rotatably attached to the leg receiver.

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 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 chair includes a seat body, a front leg, a rear leg, and a leg receiver. The seat body has a seating face for a person to sit on, and a backrest for a person to lean against. One end of the front leg is attached to an underside region which is underside of the seating face of the seat body, in such a manner that the one end of the front leg is capable of being rotated in relation to the seat body. One end of the rear leg is rotatably attached to the seat body at a position closer to a backrest side than a position at which the one end of the front leg is attached. The leg receiver is arranged on a floor surface. The respective other ends of the front leg and the rear leg are rotatably attached to the leg receiver.