Abstract: A tilt locking device for a chair, comprising a housing configured for connection to one of a seat and a frame; a first rotatable locking member, rotatable about a first axis and biased in a first direction about the first axis, the first rotatable locking member is configured for interlocking with a notch member; a rotatable activation member, rotatable about a second axis, the rotatable activation member is configured to abut and rotate the first rotatable locking member in a second direction opposite the first direction into interlocking with the notch member.

Abstract: A locking device for an armrest pole. The locking device comprises a housing element configured for slidably accommodating the armrest pole. A locking handle comprises an abutment end, the locking handle is rotatably connected to the housing element and configured for rotation between a locked position where the armrest pole is fixed in the locking device and an unlocked position where the armrest pole is slidable in the locking device. The locking device also comprises a wedge element comprising a wedge and an abutment portion, the abutment portion configured for being directly or indirectly biased by the abutment end, the wedge configured and arranged for at least partly insertion between a portion of the armrest pole and at least a portion of the housing element in the locked position.