US 12,442,435 B2
Telescopic device
Yoshitaka Hada, Toyota (JP); Shiyogo Nakamura, Nisshin (JP); Yoshihiro Okuda, Miyoshi (JP); and Takatoshi Morimitsu, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Jan. 5, 2024, as Appl. No. 18/405,038.
Claims priority of application No. 2023-032690 (JP), filed on Mar. 3, 2023.
Prior Publication US 2024/0295255 A1, Sep. 5, 2024
Int. Cl. F16H 19/06 (2006.01)
CPC F16H 19/0663 (2013.01) [F16H 19/0618 (2013.01); F16H 19/0645 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A telescopic device comprising:
a tubular structure that is telescopable; and
an inner-side guide member that is disposed on an inner side of the tubular structure, wherein
the tubular structure includes an outer belt, and an inner belt disposed on an inner side of the outer belt,
the outer belt and the inner belt are each provided with a plurality of first protrusions and holes arranged in a row in a longitudinal direction,
the inner-side guide member has a first spiral groove extending along the first protrusions of the inner belt,
rotation of the inner-side guide member in one direction feeds out the outer belt and the inner belt such that the outer belt and the inner belt are spirally wound in a state of being engaged with each other, and the tubular structure is extended,
rotation of the inner-side guide member in another direction draws in the outer belt and the inner belt such that the state of being engaged with each other and wound is disengaged, and the tubular structure is collapsed, and
the first spiral groove includes a main part, and an end portion extending from the main part to a basal side of the inner-side guide member, wherein
the end portion of the first spiral groove has at least one of a thread pitch that is smaller than a thread pitch of the main part of the first spiral groove, or a width that is wider than a width of the main part of the first spiral groove.