Patent ID: 6353527
Filing Date: 2002-03-05
Classification: H01G

Abstract:
A variable capacitor comprising:a stator fixedly disposed and including a stator electrode; a rotor disposed rotatably in contact with the stator and having a rotor electrode opposed to the stator electrode via a dielectric member; an electrically conductive driver member arranged to be rotation-operated to rotate the rotor, the electrically conductive driver member including an engagement portion engaged with the rotor such that the rotation is transmitted to the rotor, a driver groove arranged to carry out the rotation-operation, and a spring function portion which is disposed in pressure-contact with the rotor to urge the rotor to be elastically pressed against the stator; an electrically conductive center shaft arranged to rotatably support the rotor and the driver member and being electrically connected to the driver member; a stator terminal electrically connected to the stator electrode; and a rotor terminal electrically connected to the center shaft; wherein said driver member is defined by one metal plate in which a head portion having a driver groove, the engagement portion, and the spring function portion are integrally provided with each other; said spring function portion includes a plate portion which is folded back at one end of the head portion and extends beyond the center shaft, and a portion of said plate portion defines a pressure-contact portion for the rotor.