EXTENSION-RETRACTION DEVICE
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United States of America Patent
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Issued Date -
Jun 27, 2024
app pub date -
Oct 4, 2023
filing date -
Dec 21, 2022
priority date (Note) -
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status (Latency Note)
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Abstract
The extension-retraction device according to the present disclosure is an extension-retraction device in which a first belt and a second belt wound around the outside of the first belt are spirally wound around a tubular structure. The second belt includes an engaging pin having a fitting portion that fits into a hole of the first belt and an insertion portion that protrudes from the fitting portion and is inserted into the hole of the first belt. The fitting portion has a cylindrical shape having a diameter corresponding to the hole of the first belt, and the side surface of the insertion portion is inclined so that the diameter of the insertion portion decreases toward the tip portion.
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