Abstract: A chair includes a seat member having left and right sides formed with left and right leg-holding seats, respectively. Each of the leg-holding seats defines a leg extension bore therethrough. Each of left and right leg units has an elongated front leg extending through the leg extension bore in a respective one of the leg-holding seats. Two racks are respectively fixed to and extend along the length of the front legs. A driven shaft is journalled to a bottom face of the seat member. Two pinions are respectively fixed to opposite ends of the driven shaft, and mesh respectively with the racks. A drive unit drives rotation of the driven shaft, which in turn, results in sliding movement of the seat member along the front legs.

Abstract: A foldable stroller includes two locking devices for locking a frame body in an extended position, and a twist actuator mounted on and rotatable relative to a grip and having two cam paths disposed on an inner shell surface thereof. Two cam followers are interposed between the grip and the twist actuator, and have cam surfaces to confront and slidably engage the cam paths so as to move the cam followers along an axis when the twist actuator is rotated. Two keys are secured by the cam followers and extend radially and inwardly to be inserted into and slidable along two keyways formed in the grip. Two pulling cords respectively connect the keys with the locking devices to pull the locking devices so as to unlock the frame body when the cam followers are moved. A retaining member is disposed to prevent movement of the cam followers, and is manually operable to move radially.

Abstract: The present application provides a self-lock hub unit of the lower frame of the playyard includes a body (10) having a plurality of slots formed at a periphery thereof for receiving tube legs of the playyard and a vertical cavity formed at the center thereof; an actuating member (20) which is vertically movably received in the cavity; two sliding engaging assemblies (30) movably mounted two oppositely positioned tube legs respectively, each sliding engaging assembly having a first member, a second member coupled to the first member for movably coupling the first member to one of the tube legs, and a biasing member disposed in the tube leg to bias the first and second members toward an open end of the tube leg, wherein the two oppositely positioned tube legs are rotatably received in two radially opposite slots of the body respectively; two locking means (16, 17) formed on the body at positions corresponding to the sliding engaging assemblies respectively and having a guiding portion (18, 18′) and an eng