| 摘要 |
A projection apparatus includes a casing having a first surface, a modular device having a second surface, and a tongue member complementing with the first surface and protruding outwardly from the second surface. The tongue member has an approximate section and a distal section with a cross-section greater than a cross-section of the approximate section. A U-shaped resilient member has a lower portion fixed securely on the first surface of the casing, and an upper portion defining an entrance with a width smaller than a width of the distal section of the tongue member. The distal section of the tongue member is inserted into the U-shaped resilient member via the entrance so as to mount the second surface of the modular device on the first surface of the casing.
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