Hitachi Koki Co., Ltd.

Atsushi Sumi

Tomomasa Nishikawa

Nobuhiro Takano

Kazuhiko Funabashi

Masanori Okada

Takeshi Taniguchi

Katsuhiro Oomori

Yoshiki Aoki

Hiroyuki Hanawa

Eiji Nakayama

Hiroki Uchida

Mizuho Nakamura

Masayuki Ogura

Hironori Mashiko

Takeshi Takeda

Shota Takeuchi

Keita Saitou

Yutaka Ito

Yuko Tazawa

An oscillation tool includes a grip-portion housing and a front-side housing which are fitted to each other so as to freely slide on each other. In the case that a driving unit and an oscillating unit are distanced from each other, the oscillating shaft is oscillated at a narrow amplitude. On the other hand, in a case that the driving unit and the oscillating unit are approached by each other, the oscillating shaft is oscillated at a wide amplitude.

Oscillation tool

A battery pack includes a plurality of lithium battery cells, an analog thermo sensing member, and an analog switch. The analog thermo sensing member detects, in an analog form, a battery temperature of at least one of the plurality of lithium battery cells, and outputs an output preventing signal if the battery temperature is over a first predetermined temperature. The analog switch element is the plurality of lithium battery cells in series, and is switched, based on the output preventing signal, to a state in which a current is prevented from flowing in the plurality of lithium battery cells.

Battery pack and electric tool

Portable electric driver

Growing community of inventors

Hitachinaka, Japan

Atsushi Sumi