| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that float of a waterproof case by buoyancy cannot be prevented if a balance weight is not used. SOLUTION: A camera 40 is housed in the waterproof case 20, and a lens port 30 is attached to the waterproof case 20 so that a photographic lens barrel 40a' of the camera may be positioned inside. The lens port 30 is formed of material including metallic material such as aluminum material. The weight of the lens port is determined considering size or shape of the waterproof case 20, that means, buoyancy generated in accordance with volume of the waterproof case 20. COPYRIGHT: (C)2009,JPO&INPIT
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