LED LIGHT BULB

摘要

An LED light bulb, comprising a bulb housing (1), at least two heat sinks (2), an LED chip (3), a circuit board driving the LED chip (3) operation, a bulb base (5), and a bulb cap (4); each heat sink (2) is mounted on the bulb base (5) about the circumferential direction of the bulb axis, and partially contained in the bulb housing (1); the inner lateral surface of each heat sink (2) encircles into an air cavity along the bulb axis direction; the outer lateral surface of each heat sink (2) is fixedly connected with the LED chip (3) respectively; the bottom part of each heat sink (2) is provided with a downward first opening (20) respectively; the bulb base (5) is provided with a second opening (50), the bottom part of the heat sink (2) is mounted in the bulb base (5) so that the first opening (2) appear in the second opening (50) and communicates with the air cavity; a third opening (10) is provided on the top of the bulb casing (1) and communicates with the air cavity. The air cavity forms up-and-down circulating convection air via the three openings. The structure facilitates the LED bulb to dissipate heat.