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公开(公告)号：US20240181658A1
公开(公告)日：2024-06-06
申请号：US18285861
申请日：2022-04-28
Applicant: NHK SPRING CO., LTD.
Inventor： Takafumi HIRATA , Yuki HOTODA , Yuki HAYAKAWA
Abstract: A bending structure includes a bending part that is elastically bendable with respect to the axial direction, a movable part serving as an end member that is attached to an end of the bending part in the axial direction, a thin part that is formed at the movable part and is thinner than the movable part in the axial direction, a notch that is provided at the movable part and exposes the thin part in the axial direction in a manner capable of being irradiated with a laser light of laser welding, and a welding part that is formed at the thin part by laser welding and joins the thin part to the bending part.
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公开(公告)号：US20250033230A1
公开(公告)日：2025-01-30
申请号：US18279881
申请日：2022-03-03
Applicant: NHK SPRING CO., LTD.
Inventor： Takafumi HIRATA , Yuki HOTODA , Yuki HAYAKAWA
Abstract: The present invention comprises: a first bending part and a second bending part which are capable of bending elastically; a connection part which connects the first bending part and the second bending part, and which has higher bending rigidity than the first bending part and the second bending part; and a plurality of first cord-like members which are attached to the first bending part, which are inserted through the first bending part, the connection part, and the second bending part, and which are capable of bending the first bending part via tension on the second bending part side. The first cord-like members each have a plurality of divided parts which are divided in the connection part and dispersed in the circumferential direction, and which are inserted through the second bending part in this dispersed state.
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公开(公告)号：US20230405844A1
公开(公告)日：2023-12-21
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
CPC classification number: 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.
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公开(公告)号：US20240253251A1
公开(公告)日：2024-08-01
申请号：US18291904
申请日：2022-07-20
Applicant: NHK SPRING CO., LTD.
Inventor： Takafumi HIRATA , Yuki HOTODA , Yuki HAYAKAWA
CPC classification number: B25J18/06 , B25J19/007
Abstract: A flexible structure with a multi-joint function is formed by connecting flexing parts in which wave washers are stacked and welded to each other. The flexible structure includes a first flexing part, a second flexing part, and a connection part. The first flexing part and the second flexing part are capable of flexing and extending. The connection part is welded in an axial direction between the first flexing part and the second flexing part and has a rigidity higher than the first flexing part and the second flexing part. The first flexing part and the second flexing part each include wave washers stacked in the axial direction and welded to each other. The connection part has a circulating shape in which an inner circumference and an outer circumference are each continuous in a circumferential direction.
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公开(公告)号：US20240116195A1
公开(公告)日：2024-04-11
申请号：US18275805
申请日：2022-02-24
Applicant: NHK SPRING CO., LTD.
Inventor： Takafumi HIRATA , Yuki HOTODA
CPC classification number: B25J17/02 , B25J19/0025
Abstract: Provided is a bending structure that can be reduced in diameter. The present invention is provided with a bending part 9 which has an elastically bendable and expandable inner coil part 13 and outer coil part 15, and in which a corresponding winding section 13a of the inner coil part 13 is fit in the space between adjacent winding sections 15a of the outer coil part 15. At least one of the inner and outer coil parts 13 and 15 is conductive and forms a conductive path P1. The bending part 9, which is capable of suppressing compression in the axial direction, enables the formation of the conductive path P1 without the need of another conductive line or the like, thereby simplifying the structure.
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Patent Agency Ranking
公开(公告)号：US20230330871A1
公开(公告)日：2023-10-19
申请号：US18034047
申请日：2021-10-29
Applicant: NHK SPRING CO., LTD.
Inventor： Takafumi HIRATA , Yuki HOTODA , Masahiro INABA , Yuki HAYAKAWA
Abstract: The present invention provides a bending structural body with which a simplified structure can be achieved. 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.
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公开(公告)号：US20250026032A1
公开(公告)日：2025-01-23
申请号：US18713179
申请日：2022-11-25
Applicant: NHK SPRING CO., LTD.
Inventor： Takafumi HIRATA , Yuki HOTODA , Yuki HAYAKAWA
Abstract: A flexural structure, in which a multi-structured flexible body is capable of displacing from an extended state to a flexed state, includes: an outer coil spring, constituting the multi-structured flexible body; an inner coil spring, provided inside the outer coil spring and having a wire overlap a wire of the outer coil spring in a coil radial direction to constitute the multi-structured flexible body; a one-side receiving member, receiving one side of the multi-structured flexible body; and an other-side receiving member, receiving an other side of the multi-structured flexible body. A close-contact state between wires of the inner and outer coil springs and is set in accordance with a spacing between the one-side receiving member and the other-side receiving member.
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公开(公告)号：US20240351224A1
公开(公告)日：2024-10-24
申请号：US18291910
申请日：2022-07-20
Applicant: NHK SPRING CO., LTD.
Inventor： Takafumi HIRATA , Yuki HOTODA , Yuki HAYAKAWA , Yuta ISHIYAMA
IPC: B25J18/06
CPC classification number: B25J18/06
Abstract: A flexible structure includes a first member, a second member, a recess, and a wire. The first member is capable of flexing and extending. The second member covers an outer circumference of the first member and is capable of flexing and extending in conjunction with the first member. The recess is provided at an inner circumference of the second member. The wire is held between the first member and the second member in a state in which at least a part of the wire is inserted into the recess in the radial direction.
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公开(公告)号：US20210307773A1
公开(公告)日：2021-10-07
申请号：US17268891
申请日：2019-08-02
Applicant: NHK SPRING CO., LTD. , RIVERFIELD Inc.
Inventor： Takafumi HIRATA , Shimpei KUROKAWA , Yuki HOTODA , Daisuke HARAGUCHI , Koki SHINDO , Kyohei TAKIKAWA
Abstract: An instrument for a surgical assistance robot is provided with a bending structure that enables a joint function part to be bent and 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.
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公开(公告)号：US20240189981A1
公开(公告)日：2024-06-13
申请号：US18287020
申请日：2022-04-28
Applicant: NHK SPRING CO., LTD.
Inventor： Takafumi HIRATA , Yuki HOTODA , Masahiro INABA , Yuki HAYAKAWA
IPC: B25J9/00
CPC classification number: B25J9/0015
Abstract: Provided is a multi-joint bending structure body that makes it possible to obtain a structure capable of making a small-radius turn. The present invention comprises: a plurality of first bendable parts 9 and second bendable parts 11 that can elastically bend with respect to the axial direction; and an intermediate part 13 that is positioned between a first bendable part 9 and a second bendable part 11 which are adjacent to each other. The first bendable parts 9 and the second bendable parts 11 are provided with a flexible member 17 that is an integral body in the axial direction. The intermediate part 13 is attached to the flexible member 17 between the first bendable part 9 and the second bendable part 11 which are adjacent, and suppresses the bending of the flexible member 17 with respect to the axial direction.
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