公开(公告)号：US12098755B2

公开(公告)日：2024-09-24

申请号：US17601425

申请日：2020-04-10

Applicant: NHK SPRING CO., LTD.

Inventor： Motoyuki Otsuka ,  Takafumi Hirata ,  Shimpei Kurokawa ,  Soichi Nakayama ,  Masahiro Inaba

IPC: F16F1/32 ,  A61B17/29 ,  A61B34/00 ,  A61B34/20 ,  F16F1/02 ,  A61B17/00 ,  A61B34/30 ,  B25J9/00 ,  B25J18/06

CPC classification number: F16F1/328 ,  A61B17/29 ,  A61B34/71 ,  F16F1/025 ,  A61B2017/00305 ,  A61B2034/301 ,  B25J9/0015 ,  B25J18/06

Abstract: Provided is a flexible member that can exhibit excellent load resistance and flexibility while achieving a reduction in size. This flexible member includes: a main body part which has multiple wave washers stacked in an axial direction and joined to each other, and the main body part is able to be bent with respect to the axial direction due to elastic deformation of the wave washers; and a linking member that is elastically deformable, the linking member being provided at an end part of the main body part and being linked to other member. A deformation amount of the linking member is smaller than a deformation amount of the wave washer, when the main body part is bent.

公开(公告)号：US12296467B2

公开(公告)日：2025-05-13

申请号：US18034047

申请日：2021-10-29

Applicant: NHK SPRING CO., LTD.

Inventor： Takafumi Hirata ,  Yuki Hotoda ,  Masahiro Inaba ,  Yuki Hayakawa

IPC: B25J18/06 ,  B25J9/10

Abstract: The bending structural body comprises: an inner cylinder that is formed from a first inner coil part and a first outer coil part, and in which wound parts corresponding to the first inner coil part are respectively fitted to pitches between adjacent wound parts of the first outer coil part; an outer cylinder that covers at least some of the outer circumference of the inner cylinder with a space therebetween, that is formed from a second inner coil part and a second outer coil part, and in which wound parts corresponding to the second inner coil part are respectively fitted to pitches between adjacent wound parts of the second outer coil part; and drive wires and guide wires that are guided and axially inserted into the space between the inner cylinder and the outer cylinder.

公开(公告)号：US12202134B2

公开(公告)日：2025-01-21

申请号：US18034360

申请日：2021-10-29

Applicant: NHK SPRING CO., LTD.

Inventor： Takafumi Hirata ,  Yuki Hotoda ,  Masahiro Inaba

IPC: B25J18/06

Abstract: A bending operation mechanism comprises: an elastically bendable driving part; an elastically bendable driven part that is provided separate from the driving part; and a linking part that connects the driving part and the driven part, and tensions and bends the driven part in accordance with bending of the driving part. The driving part and the driven part each comprise an inner coil part and an outer coil part that are bendable with respect to the axial direction, and wound parts corresponding to the inner coil part are respectively fitted to pitches between adjacent wound parts of the outer coil part.