×

Piezoelectric power generator for a portable power supply unit and portable electronic device equipped with same

  • US 5,751,091 A
  • Filed: 01/31/1996
  • Issued: 05/12/1998
  • Est. Priority Date: 02/01/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A portable power supply unit having a piezoelectric power generator, comprising:

  • two vibrating arms each having a free end being able to freely vibrate and a support end for supporting said free end, coupling member for coupling said support ends of said two vibrating arms, at least two piezoelectric portions disposed on each of said vibrating arms with a support layer disposed therebetween, each vibrating arm including at least one electrode covering at least parts of each of said piezoelectric portions or a respective vibrating arm, each of said vibrating arms including a power generating, section capable of outputting an alternating current through said electrodes;

    a vibration applying mechanism for imparting displacements to said vibrating arms to cause a first of said two vibrating arms to move in a direction opposite to the other, said vibration applying mechanism comprising a hitting portion for striking said one free end of said two vibrating arms in a direction toward the other vibrating arm and a wall portion against which said other free end of the vibrating arm strikes when a hit is applied to said one vibrating arm so that said two vibrating arms are vibrated by being sandwiched between said hitting portion and said wall portion;

    rectifying device coupled to said power generator, for rectifying the alternating current output from said power generator; and

    an electric condensing device, coupled to said rectifying device, for accumulating a rectified current.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×