US 12,281,690 B2
Extension/contraction mechanism
Yoshitaka Hada, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-Ken (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-ken (JP)
Filed on Nov. 6, 2023, as Appl. No. 18/502,080.
Claims priority of application No. 2022-197097 (JP), filed on Dec. 9, 2022.
Prior Publication US 2024/0191787 A1, Jun. 13, 2024
Int. Cl. F16H 25/20 (2006.01); F16B 7/10 (2006.01)
CPC F16H 25/20 (2013.01) [F16B 7/10 (2013.01); F16H 2025/2096 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An extension/contraction mechanism comprising a telescopic extension/contraction part, wherein
the extension/contraction mechanism comprises:
a first drive source connected to a screw shaft in such a way that it can transmit a drive force;
a first belt holder that accommodates a second belt in such a way that the second belt can be sent out to the screw shaft or the second belt can be wound-up from the screw shaft;
a second belt holder that accommodates a first belt in such a way that the first belt can be sent out to the screw shaft or the first belt can be wound-up from the screw shaft; and
a first belt holder drive part and a second belt holder drive part, and
wherein
the extension/contraction part is configured to be extended when the screw shaft rotates in one direction and sends out the first belt and the second belt so that the first belt and the second belt are spirally wound in a state in which they are engaged with each other, and is configured to be contracted when the screw shaft rotates in the other direction and draws in the first belt and the second belt so that the state in which the first belt and the second belt are engaged with each other and spirally wound, is loosened,
the first belt holder drive part configured to rotate the first belt holder independently of the rotation of the screw shaft, and
the second belt holder drive part configured to rotate the second belt holder independently of the rotation of the screw shaft.