Patent ID: 8436517
Filing Date: 2013-05-07
Classification: F21K,F21V,F21Y

Abstract:
1. A light bulb comprising: an enclosure extending along axis, defining an inner space therein, and having an open end that is registered with the axis; a heat-dissipating unit including a lamp unit including a first circuit board that is disposed at a periphery of said first heat-dissipating element, a second circuit board that is mounted on said end heat-dissipating element at one side opposite to said open end along the axis, and a plurality of light-emitting elements that are mounted on said first and second circuit boards for emitting light beams; a first heat-insulating member having a contact segment that is coupled to a proximate end of said first heat-dissipating element corresponding to a proximate end of said second heat-dissipating element that is opposite to said distal end thereof along the axis and that is proximate to said open end of said enclosure, and a separating segment that extends from said contact segment of said first heat-insulating member in the axial direction between said first and second heat-dissipating elements; a second heat-insulating member disposed between said end heat-dissipating element and a combination of said first and second heat-dissipating elements, said second heat-insulating member having a contact segment that is coupled to a distal end of said first heat-dissipating element corresponding to said distal end of said second heat-dissipating element, and a separating segment that extends from said contact segment of said second heat-insulating member in the axial direction between said first and second heat-dissipating elements; a washer mounted to said proximate end of said second heat-dissipating element and said first heat-insulating member, said end heat-dissipating element and said washer being formed with a plurality of spaced apart heat-dissipating holes that are in fluid communication with said heat-dissipating compartment; a first fastening member securing said washer to said proximate end of said second heat-dissipating element; and a second fastening member securing said second circuit board and said end heat-dissipating element to said distal end of said second heat-dissipating element.