TWI420049B - Led lamp - Google Patents

Description

Light-emitting diode lamp

The invention relates to a light-emitting diode lamp, in particular to a light-emitting diode lamp with a large illumination area.

As a new generation of light source, the light-emitting diode light source can not replace the conventional incandescent lamp on a large scale, but it has the advantages of long working life, energy saving and environmental protection, and is generally favored by the market. Moreover, the module composed of the light-emitting diode can generate a high-power, high-brightness light source, and thus will widely and revolutionarily replace the existing light source such as an incandescent lamp, thereby becoming a main light source that meets the theme of energy conservation and environmental protection.

As the power and brightness of the LED or its module increase, the heat generated is also increased. If the heating problem of the LED is not properly solved, the working life of the LED lamp will be Seriously affected. Therefore, a heat sink that is in contact with the LED module is usually disposed in the lamp to dissipate heat from the LED module. However, the light-emitting diode module of the lamp is generally placed horizontally on one side of the heat sink to form a planar light source. Such a planar light source not only generates relatively concentrated heat, but also has a single illumination direction and a limited illumination area, and cannot be Uniform and soft lighting is formed around the luminaire, which in many cases is difficult to satisfy the user.

In view of this, it is necessary to provide a light-emitting diode lamp having a large illumination area.

A light-emitting diode lamp includes a first heat sink, a second heat sink fixed to the bottom of the first heat sink, a plurality of light-emitting diode modules attached to the second heat sink, and a second heat sink And the first heat sink is matched with the fixed light cover, the second heat sink has a plurality of heat-conducting end faces of different sizes and different sizes, and the light-emitting diode module is correspondingly disposed on the heat-conducting end face, the lamp cover comprises The plurality of steps of the concave lens structure are arranged corresponding to the LED module, and the light emitted by the LED module is irradiated outward through the lamp cover step to obtain a larger illumination area.

Compared with the prior art, the step of the lamp cover of the present invention is provided with a concave lens structure, so that the light having a fixed direction emitted by the light emitting diode module is diverged through the step to obtain a larger illumination area.

10‧‧‧Positioning column

20‧‧‧First radiator

30‧‧‧second radiator

34‧‧‧Lighting diode module

40‧‧‧shade

12‧‧‧Substrate

14‧‧‧ hollow sleeve

120‧‧‧Perforation

122‧‧‧Fixed holes

22‧‧‧Base

24‧‧‧Hollow heat pipe

26‧‧‧ Heat sink

240‧‧‧Positioning holes

220‧‧‧ Reception trough

32‧‧‧Heat unit

320‧‧‧ Hollow heat conduction

322‧‧‧Fins

340‧‧‧ boards

342‧‧‧Lighting diode components

42‧‧‧ bottom cover

44‧‧‧ steps

46‧‧‧ side wall

48‧‧‧ concave lens structure

1 is a perspective assembled view of a light-emitting diode lamp of the present invention.

2 is an exploded perspective view of the light-emitting diode lamp of FIG. 1.

3 is an inverted exploded view of the light-emitting diode lamp of FIG. 1.

Figure 4 is a cross-sectional view of the lamp cover of Figure 2.

As shown in FIG. 1 to FIG. 4, the LED lamp of the present invention includes a positioning post 10, a first heat sink 20 that cooperates with the positioning post 10, and a second heat sink that is attached and fixed to the bottom of the first heat sink 20. 30. A plurality of light-emitting diode modules 34 attached to the second heat sink 30 and a lamp cover 40 that is covered with the second heat sink 30 and fixed to the first heat sink 20 . Positioning column 10 is used to fix the LED lamp in the desired position, such as the top of the house.

Referring to FIGS. 2 and 3, the positioning post 10 includes a circular substrate 12 and a hollow sleeve 14 extending vertically upward from the center of the substrate 12. A through hole 120 is defined in the center of the substrate 12, and three fixing holes 122 are uniformly and spacedly formed at the outer periphery of the substrate 12 so that a fixing member (not shown) passes through the positioning post 10 and the first heat sink 20.

The first heat sink 20 is integrally formed of a metal material such as aluminum or copper having good thermal conductivity, and includes a base 22, a hollow heat conducting tube 24 extending vertically upward from the center of the base 22, and extending radially outward along the heat conducting tube 24 and A plurality of fins 26 extend upwardly from the upper surface of the base 22. The top end of the heat conducting tube 24 is uniformly disposed with three positioning holes 240 in the circumferential direction. The positioning holes 240 are disposed in one-to-one correspondence with the fixing holes 122 of the first heat sink, so that the fixing member passing through the fixing hole 122 is screwed and fixed to the first heat sink. The positioning hole 10 is positioned in the hole 240 to fix the positioning post 10 together with the first heat sink 20. The bottom of the base 22 is provided with a circular receiving slot 220 for receiving the bottom of the second heat sink 30. The receiving slot 220 can also be used for accommodating between the bottom end of the second heat sink 30 and the lamp cover 40. A waterproof ring (not shown) prevents objects such as rain, dust, etc. from penetrating into the light-emitting diode lamp.

The second heat sink 30 includes a plurality of heat dissipating units 32 that are nested with each other. Each of the heat dissipating units 32 is integrally formed of a metal material such as aluminum or copper having good thermal conductivity, and includes a cylindrical hollow heat conducting portion 320 and a plurality of fins extending radially outward from the outer peripheral surface of the heat conducting portion 320 along the heat conducting portion 320. Slice 322. One end of the heat conducting portion 320 forms a flat heat conducting end surface, and the other end is attached and fixed to the bottom of the base 22 of the first heat sink 20. The inner and outer diameters of the plurality of heat dissipating units 32 gradually decrease in the direction of the first heat sink 20 to the globe 40. The height thereof gradually increases in the direction of the first heat sink 20 to the globe 40. Therefore, the heat dissipating units 32 are sequentially sleeved with each other to form a second shape having a shape of a tower. Heater 30.

The light-emitting diode module 34 is placed in one-to-one correspondence with the heat-conducting end faces of the heat-dissipating unit 32 of the second heat sink 30. Each of the LED modules 34 includes a circuit board 340 having a circular ring body and a light emitting diode element 342 uniformly attached to the circuit board 340. The circuit board 340 of the LED module 34 is disposed. The diameter and the outer diameter of the heat dissipating unit 32 of the heat dissipating unit 32 correspond to the inner diameter and the outer diameter of the heat dissipating unit 320, that is, the inner diameter of the light emitting diode module 34 attached to the heat conducting end surface of the heat conducting portion 320 of the heat dissipating unit 32. The outer diameter gradually decreases in the direction of the first heat sink 20 to the globe 40. Since the LED module 34 is sequentially attached to the heat dissipating unit 32 whose height and size are gradually changed, the light emitted by the LED module 34 is at different levels, and a light source having different intensity and illumination area can be provided.

The lampshade 40 is made of a transparent or translucent material such as plexiglass or resin, and functions as a concave lens in a tower-like shape, which is sized to cover the second heat sink 30, and its tip is inserted into the first The inside of the receiving groove 220 of the bottom of the heat sink. The lamp cover 40 includes a circular bottom cover 42 and a plurality of annular steps 44 extending gradually along the periphery of the bottom cover 42 and side walls 46 between adjacent steps 44. The diameter of the step 44 is gradually increased in the direction away from the bottom cover 42 and corresponds to the size of the LED module 34, so that the light emitted by the LED module 34 can directly illuminate the corresponding step 44. on. A concave lens structure 48 is disposed on the surface of each of the steps 44. Therefore, the light emitted by the LED module 34 is diverged by the concave lens structure 48 to obtain a larger illumination area.

The heat dissipating unit 32 of the second heat sink 30 is erected in the receiving slot 220 of the base 22 of the first heat sink 20 and directly attached to the base 22 of the first heat sink 20, The heat dissipation unit 32 can be fixed to the first dispersion by screws The bottom of the base 22 of the heater 20. The top end of the lamp cover 40 is inserted into the base 22 of the first heat sink 20 to be fixedly coupled with the base 22 of the first heat sink 20, so that the second heat sink 30 is housed in the light-emitting diode lamp.

The heat generated by the LED module 34 is directly dissipated through the heat dissipating unit 32 of the second heat sink 30, and the other portion of the heat is transferred to the base 22 of the first heat sink 20 through the heat dissipating unit 32. The heat sink 26 of the heat sink 20 dissipates heat to the surrounding air. Since the fins 26 are in direct contact with the outside air, the heat can be dissipated more efficiently. At the same time, the light-emitting diode module 34 of the heat-dissipating unit 32 of the second heat sink 30 is in one-to-one correspondence with the step 44 of the lamp cover 40, so that the light-emitting diode module 30 emits a strong light with a certain direction. The concave lens structure 48 of the step 40 of the lampshade 40 diverges outwardly to form a broad illumination area.

Compared with the prior art, the surface of the step 44 of the lampshade 40 of the LED lamp is provided with a concave lens structure 48, so that the light having a fixed direction emitted by the LED module is outwardly refracted by the step 44 to obtain a larger The lighting area.

It can be understood that the second heat sink 30 can be integrally formed into a tower shape by a metal material, and one end of the second heat sink 30 is formed with a plurality of heat conducting end faces having different layers and different sizes, and the light emitting diode module 34 is correspondingly placed on the heat conducting end surface.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

12‧‧‧Substrate

14‧‧‧ hollow sleeve

20‧‧‧First radiator

22‧‧‧Base

24‧‧‧Hollow heat pipe

26‧‧‧ Heat sink

240‧‧‧Positioning holes

30‧‧‧second radiator

32‧‧‧Heat unit

34‧‧‧Lighting diode module

40‧‧‧shade

42‧‧‧ bottom cover

44‧‧‧ steps

46‧‧‧ side wall

Claims (10)

A light-emitting diode lamp includes a first heat sink, a second heat sink fixed to the bottom of the first heat sink, a plurality of light-emitting diode modules attached to the second heat sink, and a second heat sink And the lamp cover fixedly coupled with the first heat sink, wherein the second heat sink has a plurality of heat conducting end faces which are hierarchically distributed and different in size, and the light emitting diode module is correspondingly placed on the heat conducting end face, and the lamp cover comprises The plurality of steps of the concave lens structure are arranged, and the step is corresponding to the LED module, and the light emitted by the LED module is irradiated outward through the step of the lamp cover to obtain a larger illumination area. The illuminating diode lamp of claim 1, wherein the second heat sink comprises a plurality of heat dissipating units, and the heat dissipating units are sequentially sleeved with each other to make the second heat sink have a tower shape. The illuminating diode lamp of claim 2, wherein the diameter of the heat dissipating unit is gradually reduced from the first heat sink to the lamp cover. The illuminating diode lamp of claim 2, wherein the height of the heat dissipating unit is gradually increased from the first heat sink to the lamp cover. The illuminating diode lamp of claim 4, wherein each of the heat dissipating units comprises a hollow heat conducting portion and a plurality of fins extending outward along the outer wall of the heat conducting portion, wherein the heat conducting end faces are correspondingly formed on the heat dissipating units One end of the heat transfer portion. The illuminating diode lamp of the fifth aspect of the invention, wherein the illuminating diode module is annularly attached to the heat conducting end surface of the heat conducting portion of the heat dissipating unit. The illuminating diode lamp of claim 6, wherein the lamp holder is further included A positioning ring that surrounds and is attached to one of the outer walls of the sleeve. The illuminating diode lamp of claim 1, further comprising a positioning post for positioning the illuminating diode lamp, the positioning post comprising a substrate fixed on a bottom of the first heat sink and a sleeve on the substrate The tube is provided with a through hole through which the power supply line passes. The illuminating diode lamp of claim 8, wherein the first heat sink comprises a base, a heat conducting tube extending from the base, and a heat sink disposed on the base and the heat conducting tube, the heat conducting tube and the positioning The sleeves of the columns communicate with each other through the perforations so that the wires passing through the positioning posts are received in the heat transfer tubes. The illuminating diode lamp of claim 9, wherein the base of the first heat sink is provided with a receiving groove for receiving the bottom of the second heat sink.