Illumination – With implement or hand held holder therefor – Hand tool
Patent
1999-03-25
2000-08-01
Cariaso, Alan
Illumination
With implement or hand held holder therefor
Hand tool
362 89, B25B 2318
Patent
active
060956593
ABSTRACT:
An electric tool structure having a lighting device, in particular an electric tool having a lighting device insertably provided near a bit or head portion of the electric tool body, includes a light shade having projection windows, a torsion adjusting knob insertably provided with light bulbs, a torsion adjusting unit disposed inside the torsion adjusting knob, a switch ring, a metal gear housing, a gear set disposed inside the metal gear housing, and a power tool body. The power tool body has a front end connected to the metal gear housing. First and second electric conductive plates of different polarities extend from a power source in an interior of the power tool body. The first electric conductive plate is in contact with a wall of the metal gear housing in a lapping manner. The second electric conductive plate contacts the wall of the metal gear housing. A first electrically conductive plate is insertably disposed in the wall of the metal gear housing. The switch ring is sleeved onto the metal gear housing, and has an inner wall provided with an electric conductive elastic plate that projects therefrom to urge against the first electrically conductive plate. The torsion adjusting unit in the torsion adjusting knob engages retainingly the wall of the metal gear housing. The torsion adjusting unit is provided with a second electrically conductive plate that is capable of contacting the first electrically conductive plate in a lapping manner, and that is connected to light bulb holders in the torsion adjusting knob. The light shade covers a front end of the torsion adjusting knob opposite to the metal gear housing such that the projection windows are aligned with the light bulbs. By turning the switch ring, the conductive elastic plate presses against the first electrically conductive plate to contact the second-electrically conductive plate to make the electrical connection so that the light bulbs can radiate light to illuminate a working zone.
REFERENCES:
patent: 2310166 (1943-02-01), Way
patent: 5412546 (1995-05-01), Huang
patent: 5793130 (1998-08-01), Anderson
patent: 6033082 (2000-03-01), Lin
Cariaso Alan
Mobiletron Electronics Co., Ltd.
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