| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive black box capable of completely shielding the inside from light at the time of using and easy in handling and capable of simply assembling. SOLUTION: The black box is composed of a fox main body 10, a cap 20 and light shielding sleeves 40 placed to face each other and attached to a pair of side plates 17 each provided with an arm passing hole (opening) about at the center through a light shielding sleeve attaching guide, and the light shielding sleeve 40 is structured to be made of cloth, to have rubber line inside and a freely expandable arm inserting port 41 and to be freely detachably attached to the box main body 10 through the guide. The box main body 10 and the cap 20 are members formed of a corrugated fiberboard and are offered with the light shielding sleeve attaching guide, the light shielding sleeve 40 and assembling parts as the black box kit.
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