ApplicationNo. 07/076723 filed on 07/23/1987
US Classes:359/824, Electromagnetic or piezoelectric drive359/696, Motor driven396/133Lens drive circuit or motor structure
ExaminersPrimary: Corbin, John K.
Assistant: Ben, Loha
Attorney, Agent or Firm
International ClassesG02B 7/08 (20060101)
H02K 7/14 (20060101)
H02K 37/12 (20060101)
G03B 3/10 (20060101)
H02K 7/06 (20060101)
Foreign Application Priority Data1986-08-02 JP
AbstractThe coils of the stepping motor are disposed on the outer periphery of stepped section of a stationary tube section of the lens assembly in a manner to define a stator yoke. The inner surface of the stepped section is provided with a helicoid gear which cooperates with a corresponding gear formed on the outer periphery of the rotatable front tube section of the lens assembly. The rotor magnet is secured on the inner periphery of a rearwardly extending flange-like section which encloses the stator yoke.