| 摘要 |
PROBLEM TO BE SOLVED: To vary opening angle even of a small tripod as desired in the same way as high-grade medium and large-sized camera tripods. SOLUTION: A screw 2 is disposed in the upper part of a tripod base 1, a center bolt 3 is disposed in the lower part, an opening angle variable nut 4 is mounted to the screw 2, and an opening angle fixing nut 5 is mounted to the center bolt 3.
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