Title:
ELECTRIC TOOL
Document Type and Number:
WIPO Patent Application WO/2016/002543
Kind Code:
A1
Abstract:
An electric tool is provided which has a more compact switching structure with durability increased by elimination of contact points. This electric tool comprises a controller which controls power supply to the motor in response to operation of a switch lever which turns rotation of the motor ON and OFF. The electric tool comprises a magnetic body (53) provided on a movable arm (52) which is moved by means of a switch lever (51), and a first and second magnetic detection means (Hall ICs (55, 56)) provided adjacent to the range of motion of the magnetic body. The first magnetic detection means (55) detects the approach of the magnetic body when the switch lever is in the motor OFF position, and the second magnetic detection means (56) detects the approach of the magnetic body when the switch lever is in the ON position. The controller uses the two detection results to determine the switch lever position. The magnetic detection means (55, 56) are housed inside of a casing (61) which is isolated from a cooling airflow path.
Inventors:
TAKEDA YUUKI (JP)
Application Number:
PCT/JP2015/067726
Publication Date:
January 07, 2016
Filing Date:
June 19, 2015
Export Citation:
Assignee:
HITACHI KOKI KK (JP)
International Classes:
B25F5/00; B24B23/02
Foreign References:
| JP2011177812A | 2011-09-15 | |||
| JP2004322274A | 2004-11-18 | |||
| JP2008296306A | 2008-12-11 | |||
| JP2009123480A | 2009-06-04 | |||
| JP2006518181A | 2006-08-03 | |||
| JP2009072880A | 2009-04-09 | |||
| JP2012139783A | 2012-07-26 | |||
| JP2013188822A | 2013-09-26 |
Other References:
See also references of EP 3162512A4
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