Flashlight with heat-dissipation device

• US 6,921,181 B2
• Filed: 07/07/2003
• Issued: 07/26/2005
• Est. Priority Date: 07/07/2003
• Status: Expired due to Fees

• Current Assignee: Mei-Feng Yen
• Original Assignee: Mei-Feng Yen
• Inventors: Yen, Mei-Feng
• Primary Examiner(s): O'Shea, Sandra
• Assistant Examiner(s): Tsidulko, Mark
• Application Number:
  US10/612,899
• Publication Number:
  US 20050007772A1
• Time in Patent Office: 750 Days
• Field of Search: 362/206, 362/202, 362/204, 362/205, 362/208, 362/294, 362/389
• US Class Current: 362/206
• CPC Class Codes: F21L 4/027 the light sources being a LED
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/767 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A flashlight structure with a heat-dissipation device is disclosed. The flashlight structure includes a base having a conducting point isolated with the base; a high-power luminary disposed on the base and having an anode electrode connecting with the conducting point and a cathode electrode connecting with the base; a power source having a positive terminal connecting to the conducting point and a negative terminal connecting to the base for providing the luminary with power; and a housing including the base and having plural heat sink for dissipating the heat produced by the high-power luminary, thereby preventing the flashlight from damage of device or diminution of use life.

Claims

1. A flashlight structure comprising:

a) a casing and having a power source;

b) a housing connected to an end of the casing and having a plurality of heat sinks located on an exterior periphery thereof;

c) a base inserted into an interior of the housing adjacent to the plurality of heat sinks and having;

i) an exterior peripheral surface engaging the interior of the housing along a length of the base;

ii) a conducting point electrically connected to a positive terminal of the power source, a negative terminal of the power source is electrically connected to the base; and

iii) an isolation piece isolating the conducting point; and

d) a luminary having an anode electrode electrically connected to the conducting point and a cathode electrode electrically connected to the base.

2. The flashlight structure according to claim 1, wherein the plurality of heat sinks are located on the housing between the luminary and the conducting point of the base.

3. The flashlight structure according to claim 1, further comprising a holding sleeve located on around an outer periphery of the casing.

4. The flashlight structure according to claim 3, wherein the holding sleeve is made of a heat-insulating material.

5. The flashlight structure according to claim 3, wherein the holding sleeve is made of a rubber material.

6. The flashlight structure according to claim 1, further comprising a switch connected to the power source for selectively controlling a power supply to the luminary.

7. The flashlight structure according to claim 1, further comprising a reflective piece located in the interior of the housing around the luminary, and a cover set located on an end of the housing opposite the casing.

8. The flashlight structure according to claim 1, wherein the luminary is a light emitting diode.

9. The flashlight structure according to claim 1, wherein the base, the housing and the casing are made of a heat-conducting and electric-conducting material.

10. The flashlight structure according to claim 1, wherein the base, the housing and the casing are made of an aluminum alloy.

11. The flashlight structure according to claim 1, wherein the housing and the base are integrally made.