JP2011258537A - Light-emitting diode lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting diode lamp of which heat dissipation efficiency is high.SOLUTION: The light-emitting diode lamp includes a radiator and at least one light-emitting diode that is installed in the radiator, in which the radiator includes a substrate having a first surface and a second surface that are opposing, a cylindrical body extending from the second surface of the substrate, a plurality of radiating fins surrounding the outer peripheral face of the cylindrical body, extended from the outer peripheral face of the cylindrical body outward in a curved shape along the radial direction of the cylindrical body, and in which the light-emitting diode is installed on the first surface.

Description

  The present invention relates to a lighting device, and more particularly to a light emitting diode lamp.

Light emitting diodes (LEDs) have advantages such as high brightness, low power consumption, and long life, so they are widely applied as lamp light sources in place of traditional fluorescent or incandescent lamps. Consumption and carbon dioxide emissions can be reduced.

  However, when a light emitting diode is activated, a large amount of heat is generated. Therefore, when the light emitting diode is applied to a compact indoor lighting device, if the amount of heat generated when the light emitting diode is activated is not immediately dissipated, the light emitting diode emits light. Not only will efficiency be affected, but the light emitting diode may also be damaged.

  The objective of this invention is providing the light emitting diode lamp which solves the said subject and has high heat dissipation efficiency.

A light-emitting diode lamp according to the present invention includes a radiator and at least one light-emitting diode installed in the radiator, and the radiator includes a substrate having first and second surfaces facing each other, and A cylindrical body extending from the second surface, and a plurality of radiating fins extending in a curved shape from the outer peripheral surface of the cylindrical body to the outside along the radial direction of the cylindrical body, surrounding the outer peripheral surface of the cylindrical body. The light emitting diode is installed on the first surface.

  Compared with the prior art, in the light emitting diode lamp according to the present invention, since the radiator is provided with a plurality of radiating fins extending outwardly in a curved shape, each radiating fin has a large radiating area, and accordingly The heat dissipation efficiency of the radiator is increased, and the amount of heat generated when the light emitting diode lamp is operated is quickly radiated to the outside by the radiator, so that the light emitting diode lamp can operate stably.

1 is an assembly view of a light emitting diode lamp according to the present invention. FIG. 2 is an exploded view of the light emitting diode lamp shown in FIG. 1. It is a top view of the heat radiator of the light emitting diode lamp shown in FIG. It is sectional drawing of the heat radiator of the light emitting diode lamp shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  Referring to FIGS. 1 and 2, a light emitting diode lamp 100 according to the present invention includes a lamp holder 10, a radiator 20 fixed to the lamp holder 10, and a plurality of light emitting devices installed in the radiator 20. A diode 30 and a lamp cover 40 installed on the radiator 20 and covering the plurality of light emitting diodes 30 are provided.

  The lamp holder 10 is electrically connected to an external power supply unit to supply power to the light emitting diode lamp 100. Since the lamp holder 10 is a standard part, the light emitting diode lamp 100 can directly replace a traditional incandescent lamp.

  The radiator 20 includes a substrate 21, an annular mounting portion 22 extending upward from the periphery of the substrate 21, a vertically long cylindrical body 23 extending downward from the periphery of the substrate 21, And a plurality of radiating fins 24 extending outward from the outer peripheral surfaces of the mounting portion 22 and the cylindrical body 23 along the longitudinal direction of the mounting portion 22 and the cylindrical body 23. The radiator 20 is integrally formed of a material that can withstand high thermal conductivity and high temperature, such as metal and ceramics. The metal material is preferably selected from copper, aluminum or an alloy thereof, and the ceramic material is preferably selected from aluminum oxide or aluminum nitride. The heat radiator 20 made of aluminum oxide or aluminum nitride further has an insulating effect. In the present embodiment, the radiator 20 is made of aluminum that is easy to mold.

  Referring to FIGS. 3 and 4, the substrate 21 includes a first surface 211 and a second surface 212 that are disposed to face each other. The substrate 21 is provided with a plurality of through holes 213 that penetrate the first surface 211 and the second surface 212. The air flow inside and outside the substrate 21 is circulated through the through hole 213.

  The mounting portion 22 is formed by extending from the periphery of the first surface 211 of the substrate 21 toward the lamp cover 40, and extends to the inside of the mounting portion 22 at the upper edge of the mounting portion 22. Two ground-like engaging portions 221 are provided. The four engaging portions 221 are installed at regular intervals along the circumferential direction of the mounting portion 22. An engagement groove 222 is formed between each engagement portion 221 and the substrate 21. The engaging portion 221 and the engaging groove 222 engage with the lamp cover 40 to fix the lamp cover 40 to the first surface 211 of the substrate 21.

  The cylindrical body 23 is formed by extending from the edge of the second surface 212 of the substrate 21 to the lamp holder 10 side. The cylindrical body 23 has a cylindrical shape, and an accommodation space 231 for accommodating the drive circuit module 50 is formed therein. The drive circuit module 50 is electrically connected to the light emitting diode 30 and the lamp holder 10. An opening 232 connected to the lamp holder 10 is formed at the end of the cylindrical body 23 away from the substrate 21.

  The heat radiating fins 24 are disposed radially around the outer peripheral surface of the cylindrical body 23. Each radiating fin 24 has a strip shape along the axial direction of the cylindrical body 23. Referring to FIG. 3, each radiating fin 24 first extends outward from the outer peripheral surface of the cylindrical body 23 along the radial direction of the cylindrical body 23 to form a first straight portion 241, and then the cylindrical body 23. Is bent to one side in the radial direction to form a curved portion 243, and finally extended outward along the radial direction of the cylindrical body 23 again to form a second linear portion 245. The curved portion 243 connects the first straight portion 241 and the second straight portion 245, and each radiating fin 24 extends outward from the outer peripheral surface of the cylindrical body 23 and has a curved shape. Each of the radiating fins 24 extends from the outer peripheral surface of the mounting portion 22 toward the outer peripheral surface of the cylindrical body 23 along the axial direction of the cylindrical body 23. The height of each radiating fin 24 extending outward from the outer peripheral surface of the cylindrical body 23 is from one end of the cylindrical body 23 close to the light emitting diode 30 to the other end of the cylindrical body 23 that is separated from the light emitting diode 30. It becomes smaller gradually. Accordingly, the volume of the light emitting diode lamp 100 can be reduced by fully utilizing the finite area of the radiating fin 24. In order to dissipate heat by making full use of the space outside the radiator 20, the radiation fins 24 are paired in pairs, and the mounting portion 22 and the cylindrical body 23 of the two radiation fins 24 of each pair. The portions close to the outer peripheral surface of each pair are close to each other, and the portions of the two radiating fins 24 that are separated from the mounting portion 22 and the outer peripheral surface of the cylindrical body 23 are separated from each other.

  The light emitting diode 30 is fixed to the first surface 211 of the substrate 21 and is electrically connected to the drive circuit module 50 through a through hole 213 of the substrate 21 via a lead (not shown).

  The lamp cover 40 is a hollow bowl made of a light transmissive material such as glass and plastic. The lamp cover 40 is installed on the mounting portion 22 of the radiator 20 so as to cover the light emitting diode 30.

  A part of the amount of heat generated when the light emitting diode lamp 100 is operated is directly transmitted to the heat radiating fins 24 through the substrate 21 of the radiator 20, and the remaining part is transmitted through the through holes 213 of the substrate 21. Is transmitted to the inside of the cylindrical body 23 through the cylindrical body 23 and then transmitted to the radiating fin 24 by the cylindrical body 23. The amount of heat generated by the drive circuit module 50 is transferred to the heat radiating fins 24 by the cylindrical body 23 of the radiator 20 and then radiated to the external environment by the heat radiating fins 24. Since the radiating fins 24 of the radiator 20 of the light emitting diode lamp 100 extend outward and exhibit a curved shape, each radiating fin 24 has a large radiating area. Therefore, the heat dissipation efficiency of the radiator 20 is increased. Since the heat generated by the light emitting diode lamp 100 is radiated to the outside by the radiator 20, the light emitting diode lamp 100 can operate stably.

DESCRIPTION OF SYMBOLS 100 Light emitting diode lamp 10 Lamp holder 20 Radiator 30 Light emitting diode 40 Lamp cover 50 Drive circuit module 21 Board | substrate 211 1st surface 212 2nd surface 213 Through-hole 22 Attachment part 221 Engagement part 222 Engagement groove 23 Cylindrical body 231 Housing space 232 Opening 24 Radiating fin 241 First straight part 243 Curved part 245 Second straight part

Claims (7)

  In a light emitting diode lamp comprising a radiator and at least one light emitting diode installed in the radiator, the radiator extends from a substrate having opposing first and second surfaces and a second surface of the substrate. And a plurality of radiating fins surrounding the outer peripheral surface of the cylindrical body and extending outwardly from the outer peripheral surface of the cylindrical body along the radial direction of the cylindrical body, and the light emitting diode Is a light emitting diode lamp installed on the first surface.   Each of the radiating fins is formed by extending outward from the outer peripheral surface of the cylindrical body along the radial direction of the cylindrical body, and from the free end of the first linear section to one side in the radial direction of the cylindrical body 2. A curved portion formed by bending to the outside and a second straight portion formed by extending outward from the free end of the curved portion along the radial direction of the cylindrical body again. The light emitting diode lamp of description.   The plurality of radiating fins are paired two by two, and the portions of the two radiating fins of each pair close to the outer peripheral surface of the cylindrical body are close to each other, and the outer peripheral surface of the cylindrical body of the two radiating fins of each pair The light emitting diode lamp according to claim 1, wherein portions separated from each other are separated from each other.   Each of the radiating fins has a strip shape along the axial direction of the cylindrical body, and the height of each radiating fin extending outward from the outer peripheral surface of the cylindrical body is one end of the cylindrical body near the light emitting diode. The light emitting diode lamp according to claim 1, wherein the light emitting diode lamp gradually decreases toward the other end of the cylindrical body away from the light emitting diode.   The light emitting diode lamp of claim 1, further comprising a transparent lamp cover fixed to a first surface of a substrate of the radiator.   An annular mounting portion is formed by extending from the peripheral edge of the first surface of the substrate to the lamp cover side, and the mounting portion is provided with a plurality of engaging portions extending to the inside of the mounting portion, The plurality of engaging portions are installed at regular intervals along the circumferential direction of the mounting portion, and an engaging groove is formed between each engaging portion and the substrate. The light emitting diode lamp according to claim 5, wherein the light emitting diode lamp is fixed to the radiator by the engagement portion and the engagement groove.   The light emitting diode lamp further includes a lamp holder, the cylinder has a cylindrical shape, and an accommodation space for accommodating a drive circuit module is formed inside the cylinder, and the substrate of the cylinder The light emitting diode lamp according to claim 1, wherein an opening connected to the lamp holder is formed at an end away from the light emitting diode.

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