Kokuyo Co., Ltd.

Takano Co., Ltd.

Tomoaki Ichikawa

Kenta Shiozawa

Kensuke Nakamura

Takao Sugano

Toshiki Yajima

Yojiro Kinoshita

Yasuhiro Shibamoto

Fei Xu

A chair is realized which takes specific measures to suppress movement of a seat in a front-rear direction when the seat swings in the front-rear and the left-right directions with respect to a support base. For the purpose, the chair wherein a seatswings in the front-rear and left-right directions with respect to a support base, the chair is configured such that swinging of the seatin front-rear direction with respect to the support baseis capable of being suppressed at one or a plurality of predetermined positions, or arbitrary position via operation of operation member

Chair whose seat swings in a front-rear direction and a left-right direction

[Problem] Provided is a chair capable of changing an operation of a movable part between allowed and suppressed states, without causing an up-down movement of a seat or without requiring a complicated structure relying on a back. [Solution] For that purpose, a weight-receiving part, the height position of which changes due to a person sitting on a seat surface, is provided on a seat, the change of the height position is mechanically transmitted to a control mechanismX configured to control an operation of a front-rear swing partbeing the movable part, and the control mechanismX changes an operation of the front-rear swing part-being the movable part between allowed and suppressed states.

Chair

In view of various movement of a seated person, when giving the left-right swinging operation to the seat in the non-conventional aspect, a chair configured such that the back can perform a new movement suitable for the left-right movement of the seat and return to the predetermined position when the seated person leaves a seat, is realized. For the purpose, a backis arranged behind a seat, and the backhas an operation mechanismM turning-movably supporting the load received from a seated person in a left-right direction in a front view, and when the load is applied, at least a part of guide partof the operation mechanismM is separated and the back moves freely, and when the applied load is removed, the back automatically returns to the neutral position along the guide part

A flange partis provided on a vertical surfaceon the plate member PM of the front-rear swing part, the flange parthas a guide surfaceextending to lateral direction and moving the rolling bodyin the longitudinal direction, a lateral direction dimension of the guide surfaceis greater than a thickness of the plate member PM, the flange partand the portion of the plate member PM forming the vertical surfacearound the flange partare integrally formed of metal; and the flange parthas a shape that goes around the circumference of the guide holeopened in the vertical surface, and then, the rolling bodyare provided independently to the left and right, to be able to a roll along the guide surface

A chair according to the present invention is a chair comprising a legarranged on a floor surface, a leg support poleerected from the leg, a support basefixed at an upper end of the leg support pole, a seatarranged above the support baseand a support mechanisminterposed between the support baseand the seatand configured to support the seatmovably in a front-rear direction and a left-right direction. Additionally, in the support mechanism, a left-right support partis attached to the support basemovably in a left-right direction, a front-rear partis attached to the left-right support partmovably in a front-rear direction, the seatis attached to the front-rear support part, and the support basehas an arm attachment part

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Kamiina-gun, Japan

Tomoaki Ichikawa