摘要:
A chair includes a seat portion 1(1B), a seat support 2(2B) supporting the seat portion 1, a rear seat support 3(3B) extending rearwardly upwardly relative to the seat support 2(2B), and a slide mechanism X1 (moving mechanism XB) for causing the seat portion 1(1B) to slide back and forth relative to the seat support 2 (2B). The chair is provided with a locking mechanism 100C for locking the seat portion 6C at a desired position in the fore-and-aft direction selectively, and a lever 110C for operating the locking mechanism 100C, the lever 110C being located at a position allowing the lever 110C to move together with the seat portion 6C in the fore-and-aft direction.
摘要:
The chair comprises an axis X1 that extends right and left and that connects a seat 6 and a supporting body 3 arranged under the seat 6 in a rotatable manner at a front end portion of the seat frame 4, an axis X2 that connects the seat 6 and a backrest 7 in a rotatable manner at a rear side to the axis X1 and an axis X3 that connects the backrest 7 and the supporting body 3 in a rotatable manner, and the seat and the backrest are made to make a rocking movement between an upright posture and a rearward tilted posture with synchronizing the seat and the backrest by adopting an arrangement of a sliding engagement structure to a supporting portion of the axis, and the chair is also provided with a restraining member B1 to restrain a sliding range of the axis X1 variably by directly working the axis X1 to be restrained, an operating member B2 to operate the restraining member B1, a transmitting axis B3 to transmit an operating force of the transmitting member B2 to the restraining member B1 and a click stop mechanism B4 to fix the restraining member B1 at a recessed position (p) where the sliding range of the axis X1 is not restrained or one of a plurality of the restraining positions (q1), (q2), (q3) where the sliding range of the axis X1 is restrained.
摘要:
Reaction force mechanism for backrest of a chair has clear large space under the seat and uses a longer reaction force spring than the prior art. The mechanism includes a base member supported on a leg, a back support member coupled by a rotation shaft to the base member to recline and support the backrest, a seat support member to which the seat is mounted, a weight-dependent reaction force mechanism for moving the seat support member in a lifting direction, and a reaction force spring for applying a spring force for returning the back support member to an original position, in which the reaction force spring is disposed in a lateral orientation between the back support member and the seat support member.
摘要:
A simple arrangement of a chair allows transformation of the shape of a backrest. The chair has a transformable backrest and a backrest receiving member that supports a bottom end portion of the backrest in a slidable manner toward a certain direction and an operating lever to select and fix a position at which the backrest is slid and the backrest can be transformed in compliance with the position fixed by the operating lever.
摘要:
Reaction force mechanism for backrest of a chair has clear large space under the seat and uses a longer reaction force spring than the prior art. The mechanism includes a base member supported on a leg, a back support member coupled by a rotation shaft to the base member to recline and support the backrest, a seat support member to which the seat is mounted, a weight-dependent reaction force mechanism for moving the seat support member in a lifting direction, and a reaction force spring for applying a spring force for returning the back support member to an original position, in which the reaction force spring is disposed in a lateral orientation between the back support member and the seat support member.
摘要:
In a chair 11 comprising at least a backrest portion 1 to support a back of a seated person and a back frame 2 to connect the backrest portion 1 with a seat, the backrest portion 1 has a pocket 3 that covers an upper portion of the back frame 2, the pocket 3 has an engaging portion 4 that prevents the upper portion from being pulled out of the pocket 3 by making an engagement with the upper portion of the back frame 2 and the upper portion of the back frame 2 is covered with the pocket 3 and the backrest portion 1 is mounted on the back frame 2 by engaging the engaging portion 4 with the covered upper portion of the back frame 2.