Hitachi Koki Co., Ltd.

Koki Holdings Co., Ltd.

Yasutaka Shimizu

Miyoji Onose

Kouji Sagawa

Yasuo Etou

Satoru Matsuno

Ai Nakayama

Kazutaka Iwata

Takeshi Taniguchi

Yoshiki Aoki

Shingo Kosugi

Toshiaki Koizumi

Rui Akiba

Tomoyuki Kawahara

Hitoshi Tsuzuki

Naoki Tadokoro

Hiroyuki Hasegawa

Yoshikazu Yokoyama

Ryosuke Nakano

Shogo Shibata

There is provided a power tool in which impact applied to a power transmission portion can be mitigated to thereby suppress components constituting the power transmission portion from being deformed and damaged. The power tool includes a brushless motorhaving a rotation shaft portionrotatable about a rotation axis A, a housingaccommodating therein the brushless motor, a power transmission portionconfigured to receive a rotation force of the rotation shaft portionand to transmit a driving force based on the rotation force, and a driven portionconfigured to be driven by receiving the transmitted driving force. The rotation shaft portionis supported by the housingso as to be movable relative to the housingin an axial direction of the rotation axis A

Power tool

A power tool includes: a power source (); a tip tool (); two switches (SWSW); and a control unit (). The tip tool () is configured to be driven by the power source (). The two switches (SWSW) are configured to be turned on for activating the power source (). The control unit () is configured to control the power source () in accordance with on/off of the two switches (SWSW), and operate if at least one of the two switches (SWSW) is turned on.

A casing of a hedge clipper which is a portable tool is provided with a power source housing in which an electric motor is housed and a main handle held by a worker, and blades serving as a tip tool are provided to the casing. An operation display panel is provided on the main handle, and a driving information display unit which displays a battery remaining capacity and a rotation speed of an electric motor as a plurality of pieces of driving information is provided on the operation display panel. The selection of the information to be displayed is switched by the operation of an operation switch unit provided in the operation display panel.

Portable tool

A chainsaw having improved cutting workability is provided. A chainsaw is used to cut an object to be worked by a saw chain. A chainsaw main body is provided with an electric motor and a sprocket, and a guide bar around which the saw chain is wound is provided on the chainsaw main body. The guide bar is attached to the chainsaw main body by a screw member serving as an attaching member. A load sensor detects whether or not the guide bar is attached to the chainsaw main body. Rotation of the saw chain is prohibited based upon a signal from the load sensor when the guide bar is not attached to the chainsaw main body.

Chainsaw

A chainsaw in which a remaining amount of chain oil to be supplied to a saw chain can be easily checked is provided. In a chainsawincluding: a saw chaindriven by a motor embedded in a main body; and an oil tankin which the chain oil to be supplied to the saw chainin wood cutting process is stored, an illumination unit (LED) is provided in vicinity of the oil tank. In this manner, the chain oil of the oil tankpositioned on a left side of the LEDcan be illuminated. This illumination unit is configured to be used also as an illuminating device for illuminating the vicinity of the saw chain, that is, an area indicated by dotted lines fromto. According to the present invention, in a dark location, the remaining amount of the chain oil can be checked, and besides, a positional relationship among the chainsawmain body, the saw chain, and the periphery thereof can be easily visually checked, so that the working efficiency can be improved.

A chain saw includes: a motor driven by electric power; a housing configured to accommodate the motor; a guide bar attached to the housing; a chain blade wound around the guide bar; a sprocket engaged with the chain blade to drive the chain blade, wherein the chain saw is configured to transmit a driving force of the motor to the sprocket via a clutch mechanism, wherein the chain saw comprises a shut-off switch for detecting an actuation of the clutch mechanism and is configured such that the power supply to the motor is stopped when the actuation of the clutch mechanism is detected by the shut-off switch so as to brake electrically. The electrical brake is provided together with a mechanical brake that is configured to work when a hand guard is rotated.

Chain saw

Pruning machine

Hedge trimmer

Portable electric driver

Growing community of inventors

Hitachinaka, Japan

Yasutaka Shimizu