| 摘要 |
A working chair comprising a seat member and a back member, each of which is pivotable about a horizontal shaft mounted in an underframe so that the seat and back members are individually adjustable, and a releasable locking means for fixing of the seat and back members in a set position. The locking means comprises a number of locking plates of which a first number of plates is fixed to the underframe at a distance behind the pivot axes of the seat and back members, and a second number of plates is fixed to the back member. The locking plates co-operate with a clamping unit mounted on the underside of the seat member and comprising clamping members for clamping the locking plates therebetween by spring action. Said spring action may be neutralized by means of a manually actuatable handle.
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