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A drill bit sharpener includes a motor assembly and a drill bit grinding assembly. The motor assembly has a motor with a drive shaft to drive the drill bit grinding assembly, which includes a driven assembly, a sharpener housing, a grinding wheel assembly and a bit guide assembly. The sharpener hous

A drill bit sharpener includes a motor assembly and a drill bit grinding assembly. The motor assembly has a motor with a drive shaft to drive the drill bit grinding assembly, which includes a driven assembly, a sharpener housing, a grinding wheel assembly and a bit guide assembly. The sharpener housing is attached to the motor assembly, and the grinding wheel assembly is rotatably mounted in the sharpener housing and is rotated by the driven assembly. The bit guide assembly is mounted in the sharpener housing above the grinding wheel assembly. An adjusting screw in the bit guide assembly is used to adjust the grinding wheel assembly relative to the bit guide assembly. Multiple bit guide holes correspond to the grinding wheel assembly are defined in the bit guide assembly and allow a drill bit to pass through to abut the grinding wheel.

대표청구항 ▼

A drill bit sharpener includes a motor assembly and a drill bit grinding assembly. The motor assembly has a motor with a drive shaft to drive the drill bit grinding assembly, which includes a driven assembly, a sharpener housing, a grinding wheel assembly and a bit guide assembly. The sharpener hous

A drill bit sharpener includes a motor assembly and a drill bit grinding assembly. The motor assembly has a motor with a drive shaft to drive the drill bit grinding assembly, which includes a driven assembly, a sharpener housing, a grinding wheel assembly and a bit guide assembly. The sharpener housing is attached to the motor assembly, and the grinding wheel assembly is rotatably mounted in the sharpener housing and is rotated by the driven assembly. The bit guide assembly is mounted in the sharpener housing above the grinding wheel assembly. An adjusting screw in the bit guide assembly is used to adjust the grinding wheel assembly relative to the bit guide assembly. Multiple bit guide holes correspond to the grinding wheel assembly are defined in the bit guide assembly and allow a drill bit to pass through to abut the grinding wheel. m said light emitting layer and to emit secondary light having a second wavelength different from said first wavelength; a second optical reflector located on one side of said light emitting layer opposite from the light extraction side to reflect said primary light; and a first optical reflector located in the light extraction side of said wavelength converter, and having a low reflectance to said secondary light emitted from said wavelength converter and a high reflectance to said primary light emitted from said light emitting layer. 6. A semiconductor light emitting element comprising: a light emitting layer for emitting primary light having a first wavelength; a wavelength converter located in the light extraction side of said light emitting layer to absorb said primary light emitted from said light emitting layer and to emit secondary light having a second wavelength different from said first wavelength; a third optical reflector configured to enclose said light emitting layer except the light extraction part to reflect said primary light emitted from said light emitting layer; and a first optical reflector located in the light extraction side of said wavelength converter, and having a low reflectance to said secondary light emitted from said wavelength converter and a high reflectance to said primary light emitted from said light emitting layer. 7. A semiconductor light emitting element comprising: a light emitting layer for emitting primary light having a first wavelength; a wavelength converter located in the light extraction side of said light emitting layer to absorb said primary light emitted from said light emitting layer and to emit secondary light having a second wavelength different from said first wavelength; and a fourth optical reflector located between said light emitting layer and said wavelength converter, and having a low reflectance to said primary light and a high reflectance to said secondary light. 8. The semiconductor light emitting element according to claim 7 wherein said light emitting layer contains as its major component a material selected from the group consisting of gallium nitride compound semiconductors, ZnSe, ZnS, ZnSSe, SiC and BN, said first wavelength is not longer than 380 nm, said wavelength converter contains a fluorescent material, and said secondary light is a visible light. 9. The semiconductor light emitting element according to one of claim 7 further comprising a light absorber located in the light extraction side of said wavelength converter, and having a low absorptance to said secondary light emitted from said wavelength converter and a high absorptance to said primary light emitted from said light emitting layer. 10. The semiconductor light emitting element according to claim 7 further comprising a first optical reflector located in the light extraction side of said wavelength converter, and having a low reflectance to said secondary light emitted from said wavelength converter and a high reflectance to said primary light emitted from said light emitting layer. 11. A semiconductor light emitting device comprising: a packaging member; a semiconductor light emitting element packaged on said packaging member to emit primary fight having a first wavelength; a wavelength converter located in the light extraction side of said light emitting element to absorb said primary light emitted from said light emitting element and to emit secondary light having a second wavelength different from said first wavelength; and a first optical reflector located in the light extraction side of said wavelength converter, and having a low reflectance to said secondary light emitted from said wavelength converter and a high reflectance to said primary light emitted from said light emitting element. 12. The semiconductor light emitting device according to claim 11 wherein said light emitting element contains in its light emitting layer a material selected from the group cons