Abstract: A swing device has a support frame, a seat having a swing axis and swing back and forth about the swing axis while a bar thereof being hung on the support frame, and a repulsive circuit for repelling a permanent magnet installed on the swing axis.

Abstract: A swing device has a support frame, a seat having a swing axis and swing back and forth about the swing axis while a bar thereof being hung on the support frame, and a repulsive circuit for repelling a permanent magnet installed on the swing axis.

Abstract: A swing device has a supporter, a seat suspended on the supporter to swing in front and back directions, a permanent magnet installed in the seat, and an electromagnet installed to face the permanent magnet in a swing path to have the same polarity as that of the permanent magnet. The electromagnet is selectively driven when the permanent magnet approaches, generating a repulsive force for the permanent magnet. The seat swings by the repulsive force. The swing device has merits in that its simple structure makes manufacturing cost reduced and that a fixed polarity of the electromagnet prevents a malfunction of the device.