Title:
ELECTRIC TOOL
Document Type and Number:
Japanese Patent JP2019107717
Kind Code:
A
Abstract:
To provide an electric tool which can realize falling suppression of a tip tool and quick stop of the tip tool with a good balance.SOLUTION: An electric tool comprising: a motor 6; a tip tool which is rotated by the motor 6; rotation detection means which detects a rotation number of the tip tool; a control part 50 which controls rotation of the motor 6; and an operation switch 5 for instructing drive and stop of the motor 6. The control part 50 applies a brake force to the motor 6 when the operation switch 5 is so operated as to stop the motor 6, gradually reduces the brake force according to a lapse of time after reduction of the rotation number of the tip tool or start of application of the brake force, and controls the brake force so that the rotation number of the tip tool is linearly reduced in association with the lapse of time.SELECTED DRAWING: Figure 5
Inventors:
SAKAI HIROKI
Application Number:
JP2017241184A
Publication Date:
July 04, 2019
Filing Date:
December 15, 2017
Export Citation:
Assignee:
KOKI HOLDINGS CO LTD
International Classes:
B25F5/00; B24B23/02
Domestic Patent References:
| JPH0866074A | 1996-03-08 | |||
| JP2012205362A | 2012-10-22 | |||
| JPH07256149A | 1995-10-09 | |||
| JP2008022678A | 2008-01-31 | |||
| JP2011005588A | 2011-01-13 | |||
| JP2010047096A | 2010-03-04 | |||
| JP2017193016A | 2017-10-26 | |||
| JPH07148676A | 1995-06-13 | |||
| JP2017070102A | 2017-04-06 |
Foreign References:
| WO2016084553A1 | 2016-06-02 | |||
| WO2016098563A1 | 2016-06-23 |
Attorney, Agent or Firm:
Takashi Murai
Hiromi Murai
Hiromi Murai