Bipolar stepping motor rotor with drive pinion and method of man

Details Bipolar stepping motor rotor with drive pinion and method of man Bipolar stepping motor rotor with drive pinion and method of man

1986-08-22

1987-10-13

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 43, 310156, H02K 3700

Patent

active

047000910

ABSTRACT:
A wristwatch movement has a Lavet stepping motor directly driving a toothed center wheel by means of a drive pinion which is an integral part of the stepping motor rotor. The rotor comprises a bipolar permanent magnet member and a plastic rotor body molded around the central part of the magnet member to surround it. The rotor body defines a pair of driving pins oriented at a preselected angle with respect to the axis of magnetization. The rotor body also includes journals supporting it for rotation within the stator opening of the stepping motor.

REFERENCES:
patent: 3320822 (1967-05-01), Tatom
patent: 3969642 (1976-07-01), Yoshino
patent: 4084403 (1978-04-01), Kitai
patent: 4206379 (1980-06-01), Onda
patent: 4250421 (1981-02-01), Masuda
patent: 4270066 (1981-05-01), Terade
patent: 4376996 (1983-03-01), Wuthrich
patent: 4483627 (1984-11-01), Muller
patent: 4571516 (1986-02-01), Schneiter
patent: 4647218 (1987-03-01), Wuthrich

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