| 摘要 |
A protective sleeve includes primarily a sleeve which contains an emplacement space for installing an MP3 (digital audio player) and is formed integrally. A back plate at an opening end at a top of the sleeve is extended upward to form an extension piece which is provided with a through-hole, and an enhancement rib is located at a bottom side of the extension piece and is extended downward to a position below the sleeve. A slot hole is located at a bottom surface of the sleeve, a transparent and concaved window area is located at a top plate of the sleeve, and a hollow part is located at a bottom of the window area. Accordingly, the sleeve can achieve a function of protection, and is provided with effects of a stronger structure and better practicability.
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