Electric power tool

• Main Authors: HIRATA YUSUKE, TOMITA AKIFUMI, KAMIYA SHINGO
• Format: Patent
• Language: Chinese; English
• Published: 27.04.2011
• Subjects: ACCESSORY MACHINES OR APPARATUS; BROACHING; COMPONENTS OR ACCESSORIES THEREFOR; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; FILING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; NAILING OR STAPLING MACHINES IN GENERAL; PERFORMING OPERATIONS; PLANING; SAFETY DEVICES, e.g. THOSE FOR SAWS; SAWING; SAWS FOR WOOD OR SIMILAR MATERIAL; SCRAPING; SHEARING; SLOTTING; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL

The invention provides an electric power tool which can brake a tool without An electric power tool comprises a main body; an electric motor to drive the tool disposed in the main body; a power supply circuit to supply electric power to the electric motor; a movable member supported by the main body ; a detector disposed in the main body to detect a movement of the movable member; a first switch disposed in the power supply circuit; and a control circuit disposed to electrically open the power supply circuit based on the detection signal from the detector. In the electric power tool, the overall length of the wires connected to the electric motor is shortened, and the radiation quantity of the electrical noise can be inhibited. Because less noise control arrangements are needed, the electric power tool is designed more compacter.