Patent Application
20100165630
1. Field of the Invention
The present invention generally relates to an illumination device, and more particularly to a lightweight light emitting diode (LED) lamp.
2. Description of Prior Art
A general illumination device such as a projection lamp, a road lamp or any other lamp usually comes with a lamp cup manufactured by an aluminum extrusion molding method, and a containing space is formed at the lamp cup for installing a light emitting unit therein, so that light emitted from the light emitting unit can be reflected and/or refracted to provide a light source required in a certain specific area.
If the light emitting unit of the aforementioned illumination device is a high-brightness light emitting body, a heat dissipating device is usually installed to dissipate the high heat produced by the light emitting unit during the light emission to prevent shortening the life of the light emitting unit due to the high heat or increasing the costs of maintenance, repair and use.
The conventional lamp cup is made of a material such as aluminum with a higher coefficient of thermal conductivity, and whose lamp cup and heat dissipating fin are manufactured by an aluminum extrusion method, so that the high heat produced by the light emitting unit can be dissipated. However, if the lamp cup is used for a larger lamp, the total weight of the lamp manufactured by the aluminum extrusion method is heavy, and the aluminum metal has a high cost, and thus the conventional lamp cup incurs a higher manufacturing cost.
In view of the foregoing shortcomings of the prior art, the inventor of the present invention based on years of experience in the related industry to conduct extensive researches and experiments, and finally developed a feasible design to overcome the foregoing shortcomings of the prior art.
It is a primary objective of the present invention to provide a heat dissipating structure of a lamp cup made of a porous material, and the lamp cup is made of a porous material, such that the structure with the porous material can be used for reducing the weight of the lamp cup, and the material having a high thermal conductivity is used for conducting the heat produced by a light emitting unit.
Another objective of the present invention is to provide a heat dissipating structure of a lamp cup made of a porous material, and the lamp cup is made of a lower priced porous material to reduce the manufacturing cost of the lamp cup.
To achieve the foregoing objectives, the present invention provides a heat dissipating structure of a lamp cup made of a porous material, and the structure comprises a lamp cup made of a porous material, a containing cavity disposed at an end of the lamp cup, a lamp holder covered onto another end of the containing cavity, a metal hood sheathed to the lamp holder and covered onto an external side of the lamp cup, and a heat conduction medium disposed between the lamp cup and the metal hood, such that a light emitting unit is contained and installed in the containing cavity of the lamp cup, and the heat produced by a light emitting unit can be conducted from the lamp cup to the metal hood and dissipated from the metal hood to the outside.
Compared with the prior art, the present invention is characterized in that the lamp cup is made of a porous material, and the structure made of the porous material can reduce the weight of the lamp cup, and the price of the porous material is lower than those made by aluminum extrusion, and thus incurs a lower manufacturing to improve the practicability and cost-effectiveness of the present invention.
The technical characteristics, features and advantages of the present invention will become apparent in the following detailed description of preferred embodiments with reference to the accompanying drawings, and the preferred embodiments are used for illustrating the present invention only, but not intended to limit the scope of the invention.
With reference to
The lamp cup 10 has a containing cavity 11 disposed at an end of the lamp cup 10, a base 12 disposed at another end of the lamp cup 10, a light emitting unit 20 contained in the containing cavity 11, and a through hole 121 disposed at the base 12. In this preferred embodiment, the lamp cup 10 has a substantially bowl-shaped cross section and includes a plurality of ribs 13 disposed on an external surface of the lamp cup 10. Of course, the invention is not limited to the aforementioned arrangement only, but any other equivalent arrangement can be adopted instead. The light emitting unit 20 is an LED module installed on a circuit board 22 of an LED lamp 21, and the light emitting unit 20 includes a connecting end 23 for passing through the through hole 121 of the base 12 and connecting a power supply to supply the required power to the light emitting unit 20.
A lamp holder 30 is covered onto another end of the containing cavity 11 of the lamp cup 10, and a plurality of heat dissipating holes 31 are disposed on a surface of the lamp holder 30 in this embodiment for facilitating the heat dissipation of the lamp cup 10, and the lamp holder 30 forms a containing space 32 corresponding to the containing cavity 11 of the lamp cup 10, and the containing space 32 is provided for installing the LED lamp 21. In addition, the lamp holder 30 is coupled to a light transmitting body 40, and the light transmitting body 40 is provided for refracting the light emitted from the light emitting unit 20.
In
A metal hood 60 is sheathed and coupled to the lamp holder 30 for covering the external side of the lamp cup 10, wherein the metal hood 60 is a hood made of a metal such as copper or aluminum with a good heat dissipating property and provided for protecting the lamp cup 10. Since the lamp cup 10 is made of a porous material, it has the advantages of a light weight and a low price, but it is also fragile. The metal hood 60 sheathed and covered onto the lamp cup 10 can prevent the lamp cup 10 from being broken or cracked easily. In addition, the metal hood 60 can prevent external moisture from entering or damaging components inside the lamp cup 10.
In an assembling process, the light emitting unit 20 is installed to the lamp holder 30, and the lamp holder 30 is covered onto the lamp cup 10 that is coated with the heat conduction medium 50 for accommodating the light emitting unit 20 in the lamp cup 10, and the semi-finished good is sheathed into the metal hood 60, such that the metal hood 60 and the lamp holder 30 are coupled with each other and covered onto the external side of the lamp cup 10, wherein the lamp cup 10 has a plurality of ribs 13 on its external surface for facilitating an attachment onto an internal wall of the aluminum hood 60, and a connecting end 23 of the light emitting unit 20 is passed through the through hole 121 of the base 12 of the lamp cup 10 and the metal hood 60 to connect an external power supply (not shown in the figure).
With reference to
With reference to
While the invention has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims.
