Abstract: In order to improve operationality to produce functions, to prevent an assembling or disassembling procedure from being complicated and to simplify a structure of a chair of multi-function, a chair having a plurality of operating portions to adjust a height of a back or a seat or to adjust a rocking motion mechanically is so arranged that each of more than two operating portions as some or all of the operating portions is made to rotate around a predetermined shaft respectively, each shaft of the operating portions is arranged in a line, and more than two operating portions as some or all of the operating portions are arranged in a line and the chair comprises an operation receiving portion as a mechanism to work each mechanism directly and a link means that connects the operating portion and the operation receiving portion, some or all of the adjusting portions that are arranged in the link means in order to adjust a motion range of the operation receiving portion that works with operation of the operating p

Abstract: In order to simplify an arrangement of a desk which can integrate a mechanism to adjust a height of a top plate and a mechanism to adjust a level of a top plate, in a desk in which a height of a top plate can be varied within a predetermined range through a height adjust mechanism, the desk is so arranged that the top plate is supported by a plurality of expansible leg support posts, and the height adjust mechanism makes use of the leg support posts and can adjust an expansile amount of the leg support posts individually within the predetermined range through a little larger than the predetermined range.

Abstract: In order to provide a desk in which a component can be commonly used for top plates of various different specifications, the desk is so constructed that a frame 2 which supports a top plate 3 comprises a plurality of frame members 21, 22, 23 and at least a part of the frame members 21, 22, 23 are provided with rail grooves 21a, 22a, 23a as a longitudinally continuous mounting portion and a certain position of the rail grooves 21a, 22a, 23a is selected, and a mounting member 4 through 7 for mounting a component such as optional components or a top plate 3 can be held at the position.