| 摘要 |
A carrying case of the type having its bottom and sidewalls formed of a U-shaped unitary member is provided which employs a structural frame made of a plurality of rigid members which are secured to one another by rivets. The frame includes upper and lower pairs of metal bars extending generally horizontally on opposite sides of the case between generally rectangular end shells which may have U-shaped metal guards disposed on their sides and bottoms. The bars are preferably made of spring steel so that they may return to their original shapes after being distorted by overloading of the case. The end shells may have integral nodes formed on them to partially shield exposed ends of the U-shaped guards.
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