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Opening/closing mechanism

  • US 5,109,570 A
  • Filed: 03/06/1991
  • Issued: 05/05/1992
  • Est. Priority Date: 03/07/1990
  • Status: Expired due to Term
First Claim
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1. An opening/closing mechanism comprising:

  • a base attached to a main body of an apparatus;

    an arm attached to an opening/closing portion of said apparatus and axially supported on said base so as to turn freely;

    a rotary plate which turnes together with said arm and which has a projection;

    a pop-up plate having an engaging portion, wherein when said opening/closing portion is closed up to a prescribed position, the engaging portion engages with the projection of said rotary plate so that said pop-up plate turns together with the rotary plate; and

    a resilient member provided between said pop-up plate and said base and compressed by turning of said pop-up plate, wherein when said opening/closing portion is released, said rotary plate is turned together with said pop-up plate by a compressive reaction force, thereby turning said opening/closing portion up to a prescribed position.

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