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Title:
WORK DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/187848
Kind Code:
A1
Abstract:
In a work device for starting a microcomputer by operation of a trigger switch, firmware is made to be updatable and the microcomputer is made to be automatically restartable during update. In the work device that has a self-holding circuit 61 maintaining power supply from a power supply circuit 12 by output from a microcomputer 40 and has a structure in which stopping output to the self-holding circuit 61 causes interruption of power supply from the power supply circuit 12 to the microcomputer 40, the firmware of the microcomputer 40 is made to be rewritable and a power holding unit (condenser C1) for temporarily continuing power supply to the microcomputer 40 is provided, thereby realizing a so-called "off-delay timer function" for restarting the microcomputer 40. This configuration enables maintenance of power to the microcomputer 40 after update of the firmware even in a work device that cannot be restarted once power has been turned off unless trigger operation is performed, thereby enabling automatic restart of the microcomputer 40 after resetting.

Inventors:
ISHIKAWA Yuki (1060, Takeda Hitachinaka-City Ibaraki, 02, 〒3128502, JP)
YAMAGUCHI Hayato (1060, Takeda Hitachinaka-City Ibaraki, 02, 〒3128502, JP)
NISHIKAWA Tomomasa (1060, Takeda Hitachinaka-City Ibaraki, 02, 〒3128502, JP)
TAKEHISA Masashi (1060, Takeda Hitachinaka-City Ibaraki, 02, 〒3128502, JP)
ITO Tatsuya (1060, Takeda Hitachinaka-City Ibaraki, 02, 〒3128502, JP)
Application Number:
JP2019/006743
Publication Date:
October 03, 2019
Filing Date:
February 22, 2019
Export Citation:
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Assignee:
KOKI HOLDINGS CO., LTD. (15-1, Konan 2-chome Minato-k, Tokyo 20, 〒1086020, JP)
International Classes:
B25F5/00
Foreign References:
JP2015188997A2015-11-02
JP2016049594A2016-04-11
JP2012254519A2012-12-27
JP2005212097A2005-08-11
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