This invention is generally directed to the manufacturing of a new built-in heat diffusion lamp body for LED lamp. It details the structure of the heat diffusion body, material, and provides a suitable manufacturing process.

DESCRIPTION OF RELATED ART
With the widening use of the LED (“light emitting diode”) lamp, for its environmentally friendliness and energy savings, the need for more efficiency rose tremendously. The insufficient heat diffusion had become the obstacle that has limited the application and development of LED lamp. The poor heat conduction and diffusion of conventional aluminum cast LED lamp has not been viewed as successful in meeting the application needs. Attempts in increasing the heat diffusion area have inevitably enlarged the sizes of the LED lamp, making the design unfavorable in practical circumstances.

SUMMARY OF THE INVENTION
In order to overcome the technical difficulty in poor heat diffusion of a conventional aluminum cast LED lamp body, the present invention has made improvement in the structure of heat diffusion body, the material used, and the technology in the manufacture.

The present invention seeks to solve the problems of poor heat diffusion, by: optimizing the volume for heat diffusion based on the power cost, available spaces, and the essential factors, such as the working environment. Based upon these parameters, the shape and size of the heat diffusion body was designed. By using the technique of extrusion moulding, the heat diffusion body, including the heat diffusion complex and heat diffusion vanes, can be manufactured at a lower cost. The required volume and outward appearance are met by secondary processing.

The present invention has the advantages of maximizing the heat diffusion area and minimizing the heat diffusion body, optimizing the heat diffusion efficiency, lowering the cost in manufacture, and presenting an elegant appearance. In addition, energy efficiency and efficient heat diffusion will add long life spans for the LED lamp. Experiments with, a 4 or a 7 watt LED lamp showed the present invention decreased the temperature in the central LED lamp by 14 degrees Celsius, prolonged the lifetime of the LED lamp by 30%, and increased the lamp efficiency by 40%.

BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view of the first embodiment of the built-in heat diffusion lamp body for LED lamp.

FIG. 2 is a side view of the second embodiment of the built-in heat diffusion lamp body for LED lamp.

FIG. 3 is a cross-section view of the first embodiment of the built-in heat diffusion lamp body for LED lamp.

FIG. 4 is a cross-section view of the second embodiment of the built-in heat diffusion lamp body for LED lamp.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
As shown in FIG. 1, the LED lamp assembly includes the heat diffusion complex (1), the diffusion element (2) evenly surrounding the hollow space (7) in the heat diffusion complex (1), the slot (4) for fastening light-gathering cover, slots (5) for fastening power supply (8), and the opening for internal connection wire (6).

The beat diffusion complex (1) and heat diffusion element (2) are manufactured through single process of extrusion moulding from Aluminum alloy. The above described structure, material used, and the technology in mechanical manufacture will re line the product and improve the heat diffusion efficiency of the heat diffusion complex. The heat diffusion lamp body is made of the diffusion element (2) that has a cross sectional shape to facilitate heat transfer. More specifically, the diffusion element (2) has straight or spiral fins or vanes, such as star, turbine or a volute with heat diffusion complex (1) at the center. The necessary volume and final shape of outward appearance are met with secondary processing such as machining. The outward appearance of the heat diffusion lamp body may be shaped into cup, ladder, or cylinder likeness upon request.

There are slots or grooves (4) and (5) in the heat diffusion complex (1) to fasten the light-gathering cover (10) and power supply (8) with the heat diffusion complex (1), respectively. The opening or conduit (6) for internal connection with wire is used to connect LED elements (9) and power supply (8). The slots or grooves (4) and (5) integrate the heat diffusion complex (1), LED power supply (8), and the light-gathering cover (10) together in the final LED lamp assembly.
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