Matsushita Electric Works, Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Yoshitaka Ichii

Hidekazu Yabuuchi

Katsuhiro Hirata

Hiroki Inoue

Tomio Yamada

Yasushi Arikawa

Tomohiro Kunita

Tomohiro Izumi

Masaaki Terano

Masayuki Suzuki

Yoshihiro Kitamura

In a power interchange system, a power generated by a power generation device is interchanged between power consumers which receive an electric power supply from a power supply system. The amount of electric power sold by a power consumer is defined as an amount of selling power, and the amount of electric power that the power consumer demands from another electricity consumer is defined as an amount of purchasing power. Power interchange groups are formed, in which power consumers interchanges an electric power thereamong, and each power consumer is provided with a power control device which manages the electric power from the power generation device.

Electric power interchange system

A linear oscillator and an electric toothbrush capable of emitting a low noise and of being assembled compact are provided. The linear oscillator, which reciprocates a shaft in an axial direction thereof, includes a plunger movable together with the shaft in the axial direction of the shaft, an elastic member for applying an axially acting resilient force to the plunger, an electromagnetic driving unit operable to reciprocate the plunger in the axial direction of the shaft at a resonant frequency when an alternating current is supplied thereto, and a fixing member restricting rotation of the plunger about an axis thereof within a predetermined angle. The electric toothbrush includes the linear oscillator and a brush head attached to the shaft for use in brushing teeth.

Linear oscillator and electrically driven toothbrush

A linear oscillator includes a reciprocating moving part, a case to contain the moving part, and an amplitude control spindle moveably supported in the case. The moving part and the amplitude control spindle reciprocate at a frequency approximately equal to the resonance frequency of the linear oscillator.

Linear oscillator

Growing community of inventors

Kyoto, Japan

Yoshitaka Ichii