Electric rotational tool driving switch system

Abstract

An electric rotational tool driving switch system in which a driving control by means of a desired push operating system or lever operating system can be selectively performed in accordance with the content of a work when the electric rotational tool is used, an appropriate tightening work of screws, etc. can be always performed efficiently, and handling can be simplified and safety can be sufficiently improved. The electric rotational tool includes an electric motor, a rotational tool, such as a driver bit, etc., which is connected to the output shaft of this electric motor and which performs work, such as the tightening of screws, etc., a driving switch which initiates the above-described work performed by the rotational tool by driving the electric motor, a torque detection means which detects the load torque generated in the rotational tool when the above-described work is completed, and a torque-set automatic stopping means which stops the driving of the rotational tool when the above-described load torque reaches a preset torque value; wherein a driving switch 30 of a push operating system, which switches the electric motor ON when the rotational tool 14 is caused to contact a work object such as a screw, etc. and displaced by being pressed, and a driving switch 32 of a lever operating system, which switches the electric motor ON when a switch lever 26 installed in the grip portion of the electric rotational tool is displaced by being pressed, are respectively constructed by combining magnets 31a, 33a and magnetic sensors 31b, 33b, and the magnetic sensors are respectively connected to the power circuit of the electric motor 12, so that either one of the above-described operating systems can be selected, and the driving of the electric motor is initiated by switching the power circuit ON through the magnetism sensing action of the magnetic sensor of the selected operating system. <IMAGE>

Description

technical field [0001] The present invention relates to an electric rotary tool such as an electric screwdriver, and particularly relates to a drive switch that can be set separately when the electric rotary tool is used, and the drive switch can perform drive control suitable for the work content, so that the operation is simple, easy and safe at all times. The driving switch method of the electric rotary tool that can accurately complete the tightening work of appropriate screws and the like. Background technique [0002] In the past, as an electric rotary tool such as an electric screwdriver driven by an electric motor, it is known that a driving switch is operated to start driving the electric motor, and by driving the electric motor, a screwdriver bit, etc. are driven. At the same time, the torque detection device detects the load torque generated on the rotary tool as the aforementioned operations are completed, and when the detected load torque reaches the value prese...

AI Technical Summary

Problems solved by technology

[0010] As mentioned above, since in the conventional electric rotary tool, a micro switch or the like is used for the driving switch which starts the driving of the electric motor, when it is operated, sparks or the like are generated at the contact of the switch, which has the effect of not only wearing the contact but also damaging the surrounding area. The shortcomings of electronic parts or electronic equipment, electronic circuits, etc. that cause various harms

Therefore, this mechanical switch mechanism not only has structural limitations in terms of small size and extended life, but also has many limitations in its structural configuration to make the overall structure of the electric rotary tool compact.

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