公开(公告)号：US20230339124A1

公开(公告)日：2023-10-26

申请号：US17799384

申请日：2021-02-12

Applicant: NHK SPRING CO., LTD.

Inventor： Motoyuki OTSUKA ,  Takafumi HIRATA ,  Shimpei KUROKAWA ,  Yuki HOTODA

IPC: B25J18/06

CPC classification number: B25J18/06 ,  A61M25/0138

Abstract: Provided are a bending structure and a joint function part, capable of stabilizing bending operation and simplifying a structure. An inner coiled part is located into an outer coiled part. The outer coiled part and the inner coiled part have a plurality of gaps distancing adjacent coils in an axial direction, and the coils of the inner coiled part fit between the adjacent coils of the outer coiled part while being in contact with the adjacent coils. A dimension P is set in a range meeting πR/4N≤P

公开(公告)号：US20230256625A1

公开(公告)日：2023-08-17

申请号：US18015537

申请日：2021-07-14

Applicant: NHK SPRING CO., LTD.

Inventor： Takafumi HIRATA ,  Yuki HOTODA ,  Masahiro INABA

IPC: B25J17/02 ,  A61B34/30

CPC classification number: B25J17/02 ,  A61B34/30 ,  A61B2034/305

Abstract: A joint function unit, in which a movable part is supported by a base partso as to be displaceable in an axial direction thereof, includes: a plurality of drive wireseach having a fixed partfixed to the movable parton one side in the axial direction and the a supported partsupported by the base parton the other side in the axial direction; and an elastic bodysupporting the supported partof each of the plurality of drive wireson the base part, energizing the supported partwith respect to the fixed partin the axial direction, and applying tension to the drive wires.

公开(公告)号：US20230001590A1

公开(公告)日：2023-01-05

申请号：US17268929

申请日：2019-08-02

Applicant: NHK SPRING CO., lTD.

Inventor： Takafumi HIRATA ,  Shimpei KUROKAWA ,  Yuki HOTODA

IPC: B25J17/02 ,  B25J9/10

Abstract: Provided is a bending structure and a joint function part, capable of ensuring sufficient flexibility and rigidity in an axial direction. The bending structure is provided with an outer coiled part formed of a wire wound in a coiled shape and an inner coiled part formed of a wire wound in a coiled shape and arranged in the outer coiled part, wherein the outer coiled part has a plurality of gaps to distance adjacent coils, and coils of the inner coiled part are provided so as to correspond to the gaps of the outer coiled part and fit between the adjacent coils while being in contact with the adjacent coils of the outer coiled part.

公开(公告)号：US20220193932A1

公开(公告)日：2022-06-23

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: B25J18/06 ,  A61B17/29 ,  F16F1/32

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.