Title:
【発明の名称】電磁駆動シャッター装置
Document Type and Number:
Japanese Patent JP2868965
Kind Code:
B2
Abstract:
FIELD: cine and photographic equipment. SUBSTANCE: proposed electromagnetic shutter includes two tabs 64, 66, exposure setting ring 8 turned by pulse stepping motor and including cam 14 for exposure setting and opening of tabs, boss 18 and release cam 16, focusing ring 10, spring 43 of return motion to ensure reverse motion of focusing ring, means blocking focusing ring 10, contactor 86, central processor 92 to control turn of pulse stepping motor in accordance with signal coming from circuit determining illuminance and distance to object. EFFECT: increased functional reliability and speed of shutter. 12 cl, 16 dwgd
Inventors:
JO ZAIKEI
SAI TOKUHIRO
RI SENKO
SAI TOKUHIRO
RI SENKO
Application Number:
JP3270493A
Publication Date:
March 10, 1999
Filing Date:
January 28, 1993
Export Citation:
Assignee:
SANSEI KOKU SANGYO KK
International Classes:
G03B9/10; G03B9/00; G03B9/08; G03B9/14; G03B9/24; (IPC1-7): G03B9/10
Domestic Patent References:
| JP6319632A |
Other References:
見城尚志 著「モーターのＡＢＣ オモチャから夢のモータまで」株式会社講談社 １９８９年４月１日発行 （１）ｐｐ，４１−４４「２．２ 永久磁石を用いないステッピング・モーター」の項、ならびに図２．５および図．２．７ （２）ｐｐ．８８−９５「３．４ステッピングモータとは何か」の項
Attorney, Agent or Firm:
Kihei Watanabe (1 person outside)