US Patent 11060557 Telescopic mechanism

A telescopic mechanism includes a first component and a second component. The second component is capable of moving relative to the first component along a longitudinal direction. One of the first component and the second component is arranged with a contacting portion. The contacting portion resiliently abuts against the other one of the first component and the second component, such that a friction resistance is provided when the second component is moved relative to the first component.