Low-profile stepping motor with two coils arranged flush...

Details Low-profile stepping motor with two coils arranged flush... Low-profile stepping motor with two coils arranged flush...

2005-04-26

2005-04-26

Nguyen, Tran (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S216006, C310S216055, C310S254100, C310S256000, C310S049030

Reexamination Certificate

active

06885128

ABSTRACT:
A low-profile stepping motor has a stator assembly structured such that first and second coil units are disposed flush with each other horizontally and are sandwiched between upper and lower stator yoke pieces each comprising first and second stator yokes which are punched out integrally with each other, are shaped symmetrically, and which each have a plurality of pole teeth along its semi-circular inner circumference. The upper and lower stator yoke pieces are fixedly put together via the coils such that hollow-cylindrical protrusions formed in the upper and lower stator yoke pieces are inserted into through-holes of first and second coil bobbins from the upper and lower sides, respectively, and have their abutting end surfaces welded, bonded or otherwise fixed to each other, whereby the coil units are surely held between the upper and lower stator yoke pieces.

REFERENCES:
patent: 5703419 (1997-12-01), Mizutani
patent: 5829119 (1998-11-01), Matsushita et al.
patent: 6703728 (2004-03-01), Goubely et al.
patent: 2 793 966 (2000-11-01), None
patent: 61 295854 (1986-12-01), None
patent: 63 240361 (1988-10-01), None
patent: 01 099466 (1989-04-01), None
patent: 01 136550 (1989-05-01), None
patent: 11 196543 (1999-07-01), None

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