Patent 7375645 was granted and assigned to BenQ on May, 2008 by the United States Patent and Trademark Office.
A portable electronic device includes a housing, and a fragment mechanism installed inside the housing. The fragment mechanism includes a first fragment, and a second fragment pressing against the first fragment. The first fragment is capable of being separated from the second fragment when an impulsive force greater than a critical impulsive force is applied to the portable electronic device.