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：US12038060B2

公开(公告)日：2024-07-16

申请号：US17601927

申请日：2020-04-13

Applicant: NHK SPRING CO., LTD.

Inventor： Yosuke Kawai ,  Shimpei Kurokawa ,  Yuki Hayakawa

IPC: F16F3/02 ,  B25J18/06 ,  A61B34/30

CPC classification number: F16F3/02 ,  B25J18/06 ,  A61B34/30 ,  F16F2226/048

Abstract: The present invention provides a flexible member having excellent load resistance and flexibility while achieving a reduction in size. This flexible member is provided with: a main body part which includes multiple wave washers that are stacked in an axial direction and are joined to one another by multiple joint parts, and which is capable of bending relative to the axial direction by elastic deformation of the wave washers; and easily deformable parts formed between the joint parts that are adjacent to one another in the circumferential direction in each wave washer.