Abstract: An adjustment mechanism is adapted to be installed in an armrest that includes a support member and an arm member disposed over and mounted rotatably to the support member. The adjustment mechanism includes a fixed unit adapted to be fixedly mounted in the support member, and a rotating unit adapted to be co-rotatable with the arm member. The fixed unit includes an elastic plate formed with a plurality of notches, and a joint block having a plurality of concavities. The rotating unit includes a linking plate having two rotating columns, and an engaging component. The rotating columns removably engage two corresponding ones of the notches, and the engaging component removably engages one of the concavities of the joint block.

Abstract: An adjustment mechanism is adapted to be installed in an armrest that includes a support member and an arm member disposed over and mounted rotatably to the support member. The adjustment mechanism includes a fixed unit adapted to be fixedly mounted in the support member, and a rotating unit adapted to be co-rotatable with the arm member. The fixed unit includes an elastic plate formed with a plurality of notches, and a joint block having a plurality of concavities. The rotating unit includes a linking plate having two rotating columns, and an engaging component. The rotating columns removably engage two corresponding ones of the notches, and the engaging component removably engages one of the concavities of the joint block.

Abstract: An adjusting mechanism is provided for selectively setting a restoring force acting on a backrest of a chair. In a biasing unit of the adjusting mechanism, a spring segment is disposed between a head end and a follower end to bias the follower end to the remote position. The follower end is angularly movable on a cam surface between distal and proximate positions. In response to movement of a backrest of the chair from a normal position to an inclined position to permit the follower end to be forced by the cam surface to move from the remote position to a close position, two different restoring forces can be set by adjusting the follower end between the distal and proximate positions.

Abstract: An adjusting mechanism is provided for selectively setting a restoring force acting on a backrest of a chair. In a biasing unit of the adjusting mechanism, a spring segment is disposed between a head end and a follower end to bias the follower end to the remote position. The follower end is angularly movable on a cam surface between distal and proximate positions. In response to movement of a backrest of the chair from a normal position to an inclined position to permit the follower end to be forced by the cam surface to move from the remote position to a close position, two different restoring forces can be set by adjusting the follower end between the distal and proximate positions.

Abstract: An armrest assembly includes a mounting plate disposed on a support column and having an elongated moving slot for a first pivot shaft to movably extend therethrough, an armrest plate having a sliding slot elongated transverse to the moving slot such that the first and second pivot shafts extend through and are slidable along the sliding slot to allow the armrest plate to be horizontally movable and turnable relative to the mounting plate, and a retaining unit disposed to produce a magnetically attractive force that generates resistance against a relative movement of the armrest plate to the mounting plate.

Abstract: An armrest assembly includes a mounting plate disposed on a support column and having an elongated moving slot for a first pivot shaft to movably extend therethrough, an armrest plate having a sliding slot elongated transverse to the moving slot such that the first and second pivot shafts extend through and are slidable along the sliding slot to allow the armrest plate to be horizontally movable and turnable relative to the mounting plate, and a retaining unit disposed to produce a magnetically attractive force that generates resistance against a relative movement of the armrest plate to the mounting plate.