US 2020/0403544 A1Published application

Work device

AssigneeKoki Holdings Co., Ltd.

InventorsYuki ISHIKAWA, Hayato Yamaguchi, Tomomasa NISHIKAWA, Masashi TAKEHISA, Tatsuya ITO

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Abstract

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 is enabled.

Claims13

Dependent claims

A work device, comprising:

a control apparatus that controls an operation of a device,
a microcontroller arranged in the control apparatus and used for executing a program,
a motor that operates the device, a battery that supplies electric power to the microcontroller and the motor,
a power supply circuit that generates a constant low voltage supplied to the control apparatus from the electric power of the battery, and
a changeover switch for supplying the electric power from the battery to the control apparatus,
power supply from the power supply circuit to the control apparatus being started by an operation of the changeover switch;
wherein the control apparatus has a self-holding circuit that continues to maintain power supply from the power supply circuit by output from the microcontroller even after the operation of the changeover switch is returned, and the microcontroller stops output to the self-holding circuit to thereby stop the power supply from the power supply circuit to the control apparatus;
the control apparatus further has an off-delay circuit for temporarily continuing the power supply to the microcontroller even after the power supply from the battery to the microcontroller is cut off.

5 more elements

A work device, comprising:

a control apparatus that controls an operation of a device,
a microcontroller arranged in the control apparatus and used for executing a program,
a motor that operates the device, a battery that supplies electric power to the microcontroller and the motor,
a power supply circuit that generates a constant low voltage supplied to the control apparatus from the electric power of the battery, and
a changeover switch for supplying the electric power from the battery to the control apparatus,
power supply from the power supply circuit to the control apparatus being started by an operation of the changeover switch;
wherein further comprising:
a communication apparatus capable of wirelessly performing two-way communication between an external device and the microcontroller,
a memory apparatus being rewritable that causes the work device to perform a predetermined operation and stores the program, and
a regulation mechanism that mechanically regulates the operation of the changeover switch;
wherein the microcontroller reflects an update program obtained from outside via the communication apparatus in the memory apparatus;
and
writing of the update program to the memory apparatus is allowed only when the operation of the changeover switch is regulated by the regulation mechanism.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/956,608Filed 22 Feb 2019
Priority: JP 2018-06773130 Mar 2018
Published: 24 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B25B 21/00
Portable power-driven screw or nut setting or loosening tools
H02P 23/0077
Arrangements or methods for the control of AC motors characterised by a control method other than vector control: characterised by the use of a…
B25B 23/00
Details of, or accessories for, spanners, wrenches, screwdrivers
B25F 5/00
Details or components of portable power-driven tools not particularly related to the

Family

US 11,469,699 B2Related patent
US 2020/0403544 A1This patent

From the US filing history. Foreign family members aren’t listed.

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