Title:
電動工具
Document Type and Number:
Japanese Patent JP5743303
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a power tool in which electronic circuit boards are miniaturized and the reliability of signal lines connecting a plurality of the electronic circuit boards is improved.SOLUTION: The power tool includes a motor for driving a tip tool via a power connection mechanism, the plurality of circuit boards 9 and 10 that load circuits for controlling the motor rotation, and a housing for storing them. The circuit boards 9 and 10 are connected through a flexible printed board having a plurality of signal lines, and connectors 130 and 140 which connect the circuit boards 9, 10, and the flexible printed board. A plurality of connector contacts 143-1 through 3 and 143-22 through 24 are allocated to signal lines 101a and 124a among the plurality of the signal lines. Thus, a plurality of connector contacts are provided to a single control signal so that a contact failure caused by attaching/detaching of an outer edge part of the extremely compact connector 140 can be prevented.
Inventors:
Hiroshi Mashiko
Yoshio Iimura
Tomomasa Nishikawa
Mizuho Nakamura
Yoshio Iimura
Tomomasa Nishikawa
Mizuho Nakamura
Application Number:
JP2011136828A
Publication Date:
July 01, 2015
Filing Date:
June 20, 2011
Export Citation:
Assignee:
Hitachi Koki Co., Ltd.
International Classes:
B25F5/00
Domestic Patent References:
| JP2009248290A | ||||
| JP2126385U |
Foreign References:
| US20070188984 | ||||
| US20040029418 |
Attorney, Agent or Firm:
Shinichi Kakubo