US 5,846,136 AGranted

Swing chair

OwnerSung-Tsun Wuinventor

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Abstract

A swing chair includes a frame structure having a rectangular base constituted by four bar members defining two rear corners and two front corners and two standing bar members respectively extending upward from two rear corners and inclining toward the front corners with a space between the two standing bar members. Each of the standing bar members has an axle extending therefrom toward each other in a co-linear manner, the axle having a pendent arms rotatably mounted thereto and extending downward therefrom to define a lower end. A chair is positioned in the space between the two standing bar members and attached to the lower ends of the pendent arms so as to be rotatable or swingable about the axles. One of the standing bar members has a swing drive mechanism fixed to the top end thereof. The drive mechanism includes a motor coupled to the axle of the standing bar member by a worm and worm gear pair. The worm gear has an eccentric pin. The axle has a link member mounted thereto and the link has an elongated slot into which the eccentric pin is movably received so as to convert the rotation of the motor into the reciprocal rotation of the axle which in turn drive the pendent arm to swing.

Claims10

Dependent claims

A swing chair comprising a frame structure having a bottom base from which two spaced standing bar members extend upward to each define a top end with a transverse axle mounted thereto for rotatably supporting a pendant arm extending downward therefrom so as to allow the arm to be swingable with respect to the frame, the axles of the standing bar members being arranged to be co-linear to define a rotational axis of the arms;

a chair attached to the arms so as to be reciprocally rotatable about the rotational axis between a forward swung position and a rearward swung position with respect to the frame structure;
and a swing drive mechanism mounted to the top end of one of the standing bar members, the swing drive mechanism comprising a torque source to provide a rotational motion via an output spindle, a transmission system having an input gear mounted to the output spindle of the torque source and an output gear having an eccentric pin orbitable about rotational axis of the output gear, a link transverse to and mounted to the axle of the one of the standing bar members with an elongated slot formed thereon for movably receiving the eccentric pin therein so as to define a sliding engagement between the pin and the slot which, when the output gear is driven by the torque source, drives the axle via the link to swing the arm and the chair attached to the arm between the forward swung position and the rearward swung position.

Dependencies are inferred from the claim text.