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Automatic switching-off structure for protecting electronic device from burning

  • US 5,708,553 A
  • Filed: 07/18/1996
  • Issued: 01/13/1998
  • Est. Priority Date: 07/18/1996
  • Status: Expired due to Fees
First Claim
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1. A combined assembly of an electronic device and integrally formed automatic switching-off structure for protecting the electronic device from burning, comprising:

  • a ceramic body with electrical properties, having a first lateral side and a second lateral side;

    a first electrode attached to said first lateral side of said ceramic body;

    a second electrode attached to said second lateral side of said ceramic body;

    first and second conducting leads;

    a second conducting lead electrically connected to said second electrode; and

    a coating layer coated around an assembly formed by appropriately connected said ceramic body, said first electrode, said second electrode, said first conducting lead and said second conducting lead so as to form an outer protection layer;

    characterized in;

    at least one of said first and second conducting leads is spaced apart from the corresponding electrode so as to be mechanically and electrically connected to the corresponding electrode by a column of solder extending outwardly from the corresponding electrode and having a predetermined melting point; and

    a coating layer coated around said ceramic body, said first electrode second electrode said first conducting lead and said second conducting lead so as to form an outer protection layer, whereby said coating layer is formed of a material which will soften and release a gaseous substance when heated to a predetermined temperature near its ignition point.

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