Title:
ELECTRIC TOOL
Document Type and Number:
WIPO Patent Application WO/2017/082082
Kind Code:
A1
Abstract:
Provided is an electric tool for which, by devising the arrangement of circuit boards so as to be filled with resin, mounting efficiency is increased and output is increased while size reduction is achieved. A board case (40) is disposed inside a cylindrical housing (2, 3) for housing a brushless motor, and a first circuit board (50) for driving a motor (5) and a second circuit board (70) on which a control circuit is installed are housed inside the board case. The boards (50, 70) are stacked inside the board case in the direction that is perpendicular to the open face thereof and are disposed so as to extend in directions that are parallel to the open face. The boards (50, 70) are stacked so as to be parallel using a pin header and only the first circuit board (50) is screwed to the board case. Then, a curable resin that hardens from a liquid state is filled inside the board case (40) and is cured with the boards (50, 70) completely immersed therein.
Inventors:
YOSHINARI TAKUYA (JP)
KOIZUMI TOSHIAKI (JP)
FUNABASHI KAZUHIKO (JP)
TAKEDA YUUKI (JP)
KOIZUMI TOSHIAKI (JP)
FUNABASHI KAZUHIKO (JP)
TAKEDA YUUKI (JP)
Application Number:
PCT/JP2016/082058
Publication Date:
May 18, 2017
Filing Date:
October 28, 2016
Export Citation:
Assignee:
HITACHI KOKI KK (JP)
International Classes:
B25F5/00; B24B23/00; B25F5/02
Domestic Patent References:
| WO2007139129A1 | 2007-12-06 |
Foreign References:
| JP2010173042A | 2010-08-12 | |||
| JP2009064916A | 2009-03-26 | |||
| JP2012151226A | 2012-08-09 | |||
| JP2007321749A | 2007-12-13 | |||
| JP2000092888A | 2000-03-31 | |||
| EP1978631A1 | 2008-10-08 |
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