LED headlight for bicycle with heat removal device

• US 7,329,031 B2
• Filed: 06/29/2006
• Issued: 02/12/2008
• Est. Priority Date: 06/29/2006
• Status: Expired due to Fees

• Current Assignee: Di Shun Liao, Suh Jang Liaw
• Original Assignee: Di Shun Liao, Suh Jang Liaw
• Inventors: Liao, Di Shun, Liaw, Suh Jang
• Primary Examiner(s): Payne; Sharon E.
• Application Number:
  US11/480,166
• Publication Number:
  US 20080002416A1
• Time in Patent Office: 593 Days
• Field of Search: 362/475, 362/373, 362/192, 362/476
• US Class Current: 362/475
• CPC Class Codes: B62J 6/026 characterised by the structure, e.g. casings
• CPC Class Codes: B62J 6/16 Arrangement of switches
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21W 2107/13 for cycles
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A headlight for bicycle includes an insulative barrel and including peripheral openings; a lens mounted in the barrel; a heat sink including parallel grooves on its outer surface, and water resistant rings mounted thereon; a PCB fitted onto an end of the barrel; a reflector mounted inside the barrel; an LED bulb fitted in the reflector; and a conductor electrically interconnected the bulb and the PCB; and a power supply releasably secured to the barrel and including a switch. The switch is manually movable between on and off position and is adapted to electrically connect the power supply to the bulb when the switch is in the on position, and in response to disposing the switch in the on position, heat generated by the bulb is dissipated through the conductor, the heat sink, and the openings.

Claims

1. A headlight mountable on a bicycle comprising:

a head assembly including;

a substantially cylindrical barrel formed on an insulative material and including a plurality of openings equally spaced apart around an outer surface of the barrel, a rearward annular stanged extension, a cut on the extension, and a plurality of front slots on an inner surface;

a circular lens having a plurality of projections on a periphery of the lens, the projections adapted to fit in the slots to secure the lens to a front end of the barrel;

a cylindrical heat sink including a plurality of parallel grooves on a second outer surface of the cylindrical heat sink, at least one annular first trough spaced from a front end of the grooves, and at least one annular second trough trough spaced from a front end of the grooves;

a water resistant ring assembly including at least one first sealing ring put on the first trough, and at least one second sealing ring put on the second trough;

a printed circuit board (PCB) including a rear fist contact projected out of the cut and secured thereto when the PCB is fitted onto an end of the barrel, and a plurality of second contacts;

a parabolic reflector, including a rear opening, mounted inside the barrel;

an LED bulb fitted in the opening of the reflector; and

a heat conductive disk including a center hole and mounted on a rear portion of the reflector;

a plurality of conductors, each having one end electrically connected to the LED bulb and a second end electrically connected to one of the second contacts of the PCB;

a power supply releasably secured to the extension and including a switch;

wherein the switch is manually movable between on and off positions and is adapted to electrically connect the power supply to the LED bulb by connecting to the first contact when the switch is in the on position, and in response to disposing the switch in the on position, heat generated by the LED bulb is dissipated through the heat conductive disk, the heat sink and the openings of the barrel.