Abstract: The present invention relates to an LED cooling device and, more specifically, to an LED cooling device for increasing cooling efficiency by smoothly circulating air in an LED module, comprising a structure having: an LED lamp in which LEDs for emitting light are provided on one lateral surface of a substrate and a heat exchange means for absorbing and radiating heat is provided on the other lateral surface of the substrate; a pumping member in which a supply hole for supplying air is formed at a lower end on the outer circumference of one side on one lateral surface of the heat exchange means of the LED lamp and an inflow hole for introducing the air is formed at a central part of an upper end thereof, wherein a check valve for controlling the inflow of air is provided at the inflow hole; an operating lobe which has a predetermined length and is provided at a central part of a lower end of the pumping member; and a transfer unit for upwardly and downwardly moving the operating lobe to expand or contract the

Abstract: A bulb-type LED lighting apparatus, including: a base unit; a heat dissipating space retaining unit; a cooling block connected to the heat dissipating space retaining unit and having heat pipe fitting holes and heat dissipating fins; first and second LED circuit boards having LED modules; a heat dissipating frame including heat exchanging plates, clip parts formed on cooling fins of the heat exchanging plates so as to hold heat pipes, cover locking slits for locking protective covers, and a circuit board seat for seating the first LED circuit board; a connection plate unit including pipe fitting slots, cover locking slits for fitting the protective covers, and shoulders for supporting the protective covers; and convective circulation passages defined between the heat exchanging plates so as to allow air to circulate between the heat exchanging plates and realize circulation of air between the inside and outside of the heat dissipating frame therethrough.

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.

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.