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Packaging case having improved sidewall structure

  • US 5,511,663 A
  • Filed: 12/09/1994
  • Issued: 04/30/1996
  • Est. Priority Date: 12/15/1993
  • Status: Expired due to Fees
First Claim
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1. A packaging case comprising:

  • a case body having a substantially rectangular bottom wall, side walls respectively continuously formed with one pair of opposing edge portions of said bottom wall, and front and rear walls respectively continuously formed with the other pair of opposing edge portions of said bottom wall and extending between said side walls, said case body being adapted to store an object; and

    a lid having a substantially rectangular top wall continuously and pivotally formed with a top edge portion of said rear wall so as to cover and close an opening portion of said case body which is defined by top edge portions of said side walls, said front wall and said rear wall, lid side walls respectively continuously formed with a pair of edge portions adjacent to an edge portion of said top wall serving as a pivot center, and located outside said side walls of said case body upon closing said opening portion with said top wall, and a lid front wall continuously formed with an edge portion of said top wall which opposes said edge portion serving as the pivot center, extending between said lid side walls, and located outside said front wall of said case body upon closing said opening portion with said top wall,wherein outwardly extending flap pieces are continuously and pivotally formed on the top edge portions of said side walls of said case body, stepped portions are formed on inner surfaces of said lid side walls to engage with said flap pieces upon closing said opening portion with said top wall so as no prevent said lid from floating; and

    a thickness of a predetermined portion of each side wall of said case body which faces to a corresponding one of said flap pieces is set smaller than that of a remaining portion of said each side wall such that an inner surface of said remaining portion is located more inside of said case body than an inner surface of said predetermined portion.

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