Matsushita Electric Industrial Co., Ltd.

Yuji Shingu

Kaneichi Kondo

Kunitoshi Kawano

A high voltage generating device in which a piezo-electric element is struck by a hammer to cause arc between discharging electrodes, includes a coil having an inductance of 100 to 1500 mH connected between the piezo-electric element and the discharging electrode to extend the arc period, improve the ignition factor, improve the operability and reduce impact noise.

High voltage piezoelectric generating device with lengthened spark time

The present invention provides a high voltage generating device utilizing a piezoelectric element. The device comprises an outer rotary member having a plurality of saw tooth-like cam lobes formed on its outer circumference equidistant from each other and an inner rotary member disposed in the outer rotary member. A cam follower for applying an impact to a piezoelectric element is biased toward the outer rotary member to cooperate with one of the cam lobes. The inner rotary member has a ball mounted therein and a spring for biasing the ball radially outwardly into operative engagement with an inner surface of the outer rotary member. The inner surface of the outer rotary member is so constructed and arranged as to permit free rotation of the inner rotary member unless the inner rotary member is depressed and turned in a predetermined direction. Under this condition the outer rotary member will rotate in the same rotational direction to cause the cam lobes to actuate the cam follower at several times, thus causing the piezoelectric element to produce a series of sparks.

Growing community of inventors

Kadoma, Japan

Yuji Shingu