Thick film rotary switch
Dual shaft rotary electric device
Potentiometer having vibration damping means
Sealing structure for electrical parts Patent #: 5144277
ApplicationNo. 585580 filed on 01/16/1996
US Classes:338/167, Spring-loaded contact338/163, With knob forming casing or covering338/170With contact biasing spring on contact arm or carrier
ExaminersPrimary: Gellner, Michael L.
Assistant: Easthom, Karl D.
Attorney, Agent or Firm
Foreign Patent References
International ClassH01C 010/32
Foreign Application Priority Data1995-01-20 JP
AbstractA rotary operation type variable resistor including a resistor base and a holder, on which a sliding-element supporting member is rotatably retained, are placed in a case provided with only one opening for component insertion. An operating lever is fixedly connected to a shaft portion of the sliding-element supporting member using a speed nut. A resistor pattern is formed by printing on the resistor base in a positional relationship determined by positioning reference portions formed on the resistor base. Positioning reference portions are also formed on the holder, and positioning portions are formed in the case. A resilient-contact member for bringing the positioning reference portions of each of the resistor base and the holder into contact with the positioning portions of the case is also provided on the case. A lower bearing made of stainless steel and formed by pressing so as to have a cylindrical portion and a flange formed at one end of the cylindrical portion is integrally combined with the holder by insert molding, while an upper bearing is press-fitted to the holder, thereby forming a bearing unit for receiving the shaft portion of the sliding-element supporting member.