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AssigneeKokuyo Co., Ltd.
InventorsShinichi Kaneda, Yoichi Suzuki, Takao Sugano, Masamitu Miyashita, Tunetaro Ito, Miyoshi Katagiri
Estimating the term…
A chair provided with a backrest for use in offices, etc., comprising an inner shell (2) and an outer shell (3). Conventional chairs of this type have a problem that there is little freedom in design with respect to strength and flexibility since only the inner shell serves as a structural member. An object of this chair is to increase the freedom. To this end, in the chair of this invention, the outer shell (3) as well as the inner shell (2) are formed as an integral body L-shaped in side view and comprising a seat portion (31) and a backrest portion (32), so that a three-dimensional shell structure is formed. In this chair, various measures are taken to solve the problem caused by the outer shell which is formed into an integral body. First, a fixed shell (6) is adopted for preventing a gap from being formed. Also, to obtain a required resiliency the shells (2, 3) are of such a construction as to allow a positional shift between the shells, and the inner shell (2) is supported by two brackets (118, 119). In order not to make the user feel uneasy upon resilient deformation of the shells, they are so constructed that the brackrest point (d) can be suitably shifted. Moreover, to connect the shells properly claws, (302, 602) of a particular type and inclined bolts (355) are used. Also, to make a mechanism to be provided between the shells (2,3) as compact as possible, the balancing members (101) support a backrest support (104).
A chair provided with a backrest (5) and a seat (4) and characterized by the provision of an inner shell (2) L-shaped in side view and comprising a seat portion (21) and a backrest portion (22) formed into an integral body, and an outer shell (3) L-shaped in side view and comprising a seat portion (31) and a backrest portion (32) formed into a integral body, the outer shell (3) being fixed to the inner shell (2) in such a manner that not all surfaces of the shells contact each other;
A chair provided with a backrest (5) and seat (4) and characterized by the provision of an inner shell (2) L-shaped in side view and comprising a seat portion (21) and a backrest portion (22) formed into an integral body, and an outer shell (3) L-shaped in side view and comprising a seat portion (31) and a backrest portion (32) formed into a integral body, the outer shell (3) being fixed to the inner shell (2) in such a manner that not all surfaces of the shells contact each other, an upper backrest portion (5a) being resiliently inclinable relative to a lower backrest portion (5b), and means for connecting the backrest portion (22) of the inner shell (2) and the backrest portion (32) of the outer shell (3) at side edge portions (22s, 32s) so as to accommodate vertical displacement of the shells (2, 3) relative to each other and to accommodate the resilient inclination of the upper portion (5a) of the backrest (5) relative to the lower portion (5b) thereof as a user leans against the backrest (5).
A chair provided with a backrest (5) and seat (4) characterized by the provision of an inner shell (2) L-shaped in side view and comprising a set portion (21) and a backrest portion (22) formed into an integral body, and an outer shell (3) L-shaped in side view and comprising a seat portion (31) and backrest portion (32) formed into a integral body, the outer shell (3) being fixed to the inner shell (2) in such a manner that not all surfaces of the shells contact each other, an upper backrest portion (5a) being resiliently inclinable relative to a lower backrest portion (5b), and a plurality of pins (251, 252, 253, 254) being provided on an under surface of seat portion (21) of inner shell (2) and projecting approximately perpendiculary to an imaginary plane (P) extending between a front edge (4t) of a seat (4) and an upper edge (5t) of a backrest (5), with axes (R) of the pins (251, 252, 253, 254) extending parallel with each other, and on an upper surface of the seat portion (31) of the outer shell (3) at the positions corresponding to the pins (251, 252, 253, 254) are provided a plurality of hollow cylindrical portions (351, 352, 353, 354) projecting in axial alignment with the pins (251, 252, 253, 254), with axes (T) of the hollow cylindical portions (351, 352, 353, 354) coinciding with the axes (R) of the pins (251, 252, 253, 254), so that the outer shell (3) is connected to the inner shell (2) by inserting each of the pins (251, 252, 253, 254) into a corresponding one of the hollow cylindrical portions (351, 352, 353, 354), and the outer shell (3) is fixed to the inner shell (2) by means of bolts (355) screwed thereinto in a direction axially aligned or parallel with axes (R, T).
A chair provided with a backrest (5) and seat (4) and characterized by the provision of an inner shell (2) L-shaped in side view and comprising a seat portion (21) and a backrest portion (22) formed into an integral body, and an outer shell (3) L-shaped in side view and comprising a seat portion (31) and a backrest portion (32) formed into a integral body, the outer shell (3) being fixed to the inner shell (2) in such a manner that not all surfaces of the shells contact each other, an upper backrest portion (5a) being resiliently inclinable relative to a lower backrest portion (5b), and in which an upholstery (8) covers an upper surface (2j) of the inner shell (2) with a pad (7) interposed therebetween, and means for preventing the pad (7) from sliding on an upper surface (2j) of the inner shell (2) and comprising a projection (200) projecting upwardly aslant into the pad (7) at least on a front edge of the seat portion (21) of the inner shell (2).
A chair provided with a backrest (5) and seat (4) and characterized by the provision of an inner shell (2) L-shaped in side view and comprising a seat portion (21) and a backrest portion (22) formed into an integral body, and an outer shell (3) L-shaped in side view and comprising a seat portion (31) and a backrest portion (32) formed into integral body, the outer shell (3) being fixed to the inner shell (2) in such a manner that not all surfaces of the shells contact each other, an upper backrest portion (5a) being resiliently inclinable relative to a lower backrest portion (5b), and a continuous brim (210) extending downwardly and rearwardly from an outer circumferential edge of the inner shell (2), and a continuous brim (310) extending upwardly and forwardly from an outer circumferential edge of the outer shell (3), and the brim (310) on the outer shell (3) being situated inside and substantially parallel with the brim (210) on the inner shell (2).
A chair provided with a backrest (5) and seat (4) and characterized by the provision of an inner shell (2) L-shaped in side view and comprising a seat portion (21) and a backrest portion (22) formed into an integral body, and an outer shell (3) L-shaped in side view and comprising a seat portion (31) and a backrest portion (32) formed into a integral body, the outer shell (3) being fixed to the inner shell (2) in such a manner that not all surfaces of the shells contact each other, an upper backrest portion (5a) being resiliently inclinable relative to a lower backrest portion (5b), and the seat portion (21) of the inner shell (2) being fixed to one seat bracket (118) provided on a supporting unit (1) for supporting the seat (4), and the backrest portion (22) of the inner shell (2) being fixed to a backrest bracket (119) of a backrest support (104) extending from the support unit (1) , and the inner shell (2) not being fixed to the supporting unit (1) between the seat bracket (118) and backrest bracket (119).
A chair provided with a backrest (5) and seat (4) and characterized by the provision of an inner shell (2) L-shaped in side view and comprising a seat portion (21) and a backrest portion (22) formed into an integral body, and an outer shell (3) L-shaped in side view and comprising a seat portion (31) and a backrest portion (32) formed into a integral body, the outer shell (3) being fixed to the inner shell (2) in such a manner that not all surfaces of the shells contact each other, an upper backrest portion (5a) being resiliently inclinable relative to a lower backrest portion (5b), and balancing member (101), from a rear end of which extends a backrest support (104) for the supporting the backrest portion (22) of the inner shell (2), being pivotally mounted at middle portions thereof to a supporting base (13) by a middle shaft (102), and front end portions of the balancing members (101) being connected to a front end portion of a seat receiving frame (105), supporting the seat portion (21) of the inner shell (2), by front link members (106) pivotally mounted on the supporting base (13) with a rear end portion of the seat receiving frame (105) being connected to rear ends of the balancing members (101) by rear link members (107) so as to be movable in forward and rearward directions, so that upward movement of the front end portions of the balancing members (101) upon rearward inclination of the backrest (5) is translatable into a forward movement of seat receiving frame (105), through the front link members (106).
A chair provided with a backrest (5) and a seat (4) and characterized by an inner shell (2) L-shaped in side view and comprising a seat portion (21) and a backrest portion (22) formed into an integral body, and an outer shell (3) L-shaped in side view and comprising a seat portion (31) and a backrest portion (32) formed into a integral body, the outer shell (3) being fixed to the inner shell (2) in such a manner that not all surfaces of the shell contact each other, said inner shell having means provided therin for flexible tilting of said backrest relative to said seat, outer peripheral edges of the inner shell (2) and outer shell (3) being much the same shape and a space being provided between the outer peripheral edges of the inner shell (2) and the outer shell (3), an upholstery (8) covering an upper surface of the inner shell (2), a pad (7) interposed between the upholstery (8) and inner shell (2), and a peripheral portion (8a) of the upholstery (8) being fitted into the space between the outer peripheral edges of the inner and outer shells (2, 3).
Dependencies are inferred from the claim text.