公开(公告)号：US20240175533A1

公开(公告)日：2024-05-30

申请号：US18280591

申请日：2022-03-01

Applicant: NHK SPRING Co., Ltd.

Inventor： Yoshio YAMADA ,  Norihiro TAJIMA ,  Shuji TAKAHASHI ,  Atsushi YONEOKA

IPC: F16L55/05

CPC classification number: F16L55/05

Abstract: A pulsation damping member includes a first metal plate and a second metal plate, a crest portion of the second metal plate enters inside a crest portion of the first metal plate, a valley portion of the first metal plate enters inside a valley portion of the second metal plate, a size in the axial direction of an outer end portion of an expansion/contraction space positioned on an outermost side in a radial direction and continuous with joint parts increases toward an inner side in the radial direction, and a first constricted portion having a smallest size in the axial direction in a portion of the expansion/contraction space positioned on an inner side with respect to the outer end portion in the radial direction is positioned on a radially outward side from a center portion between the central axis and the joint parts in the radial direction.

公开(公告)号：US20210310545A1

公开(公告)日：2021-10-07

申请号：US17263862

申请日：2019-07-31

Applicant: NHK SPRING CO., LTD. ,  DAIDO KOGYOCO., LTD.

Inventor： Yoshio YAMADA ,  Takao KOBAYASHI ,  Kazubito HIRAOKA ,  Sbuji TAKAHASH! ,  Hideaki SEKI

IPC: F16H7/08

Abstract: A tensioner includes a movable section, a fixed section, a flat spiral spring, and a back-up spring. The movable section receives load from an entrained transmission body through a tension member. The fixed section supports the movable section so as to be capable of displacing. The flat spiral spring biases the movable section so as to resist the tension member. The flat spiral spring unwinds in a state in which there is a small inter-plate friction force in cases in which there is a large biasing force applied to the tension member to counter load acting from the tension member. The flat spiral spring winds-up in a state in which there is a large inter-plate friction force in cases in which there is a small biasing force applied to the tension member to counter load acting from the tension member. The back-up spring limits wind-up of the flat spiral spring.

公开(公告)号：US20240229886A9

公开(公告)日：2024-07-11

申请号：US18278512

申请日：2022-02-25

Applicant: NHK SPRING Co., Ltd.

Inventor： Yoshio YAMADA ,  Hironobu IMAIZUMI ,  Norihiro TAJIMA ,  Shuji TAKAHASHI

IPC: F16F1/18

CPC classification number: F16F1/18

Abstract: A spring member is provided between two pressed bodies facing each other in a first direction and includes base plates stacked in the first direction. Each base plate is provided with spring protrusions protruding toward either one pressed body of the two pressed bodies and pressing the two pressed bodies in directions such that the pressed bodies move away from each other in the first direction. Between two base plates adjacent to each other in the first direction, a base plate positioned closer to the one pressed body is provided with an insertion hole into which a spring protrusion of the other base plate is inserted in a state of penetrating therethrough in the first direction. Among portions in an along-plane direction along a plane orthogonal to the first direction provided with the spring protrusions, the spring constant of at least one portion is different from that of another portion.

公开(公告)号：US20210317898A1

公开(公告)日：2021-10-14

申请号：US17263845

申请日：2019-07-31

Applicant: NHK SPRING CO., LTD. ,  DAIDO KOGYOCO., LTD.

Inventor： Yoshio YAMADA ,  Takao KOBAYASHI ,  Kazubito HIRAOKA ,  Sbuji TAKAHASH! ,  Hideaki SEKI

IPC: F16H7/08 ,  F16F1/12

Abstract: A tensioner including a support member, a thrust member supported so as to be capable of reciprocating movement in a straight line along a first direction with respect to the support member, and a contact-type flat spiral spring. The flat spiral spring is disposed adjacent to the thrust member in a second direction orthogonal to the first direction. The flat spiral spring has a coil axis direction running in a third direction orthogonal to both the first direction and the second direction and includes an inner-end portion anchored to the support member and an outer-end portion anchored to the thrust member so as to bias the thrust member in a forward-direction and so as to be wound-up by movement of the thrust member in a retraction-direction.

公开(公告)号：US20240133442A1

公开(公告)日：2024-04-25

申请号：US18278512

申请日：2022-02-25

Applicant: NHK SPRING Co., Ltd.

Inventor： Yoshio YAMADA ,  Hironobu IMAIZUMI ,  Norihiro TAJIMA ,  Shuji TAKAHASHI

IPC: F16F1/18

CPC classification number: F16F1/18

Abstract: A spring member is provided between two pressed bodies facing each other in a first direction and includes base plates stacked in the first direction. Each base plate is provided with spring protrusions protruding toward either one pressed body of the two pressed bodies and pressing the two pressed bodies in directions such that the pressed bodies move away from each other in the first direction. Between two base plates adjacent to each other in the first direction, a base plate positioned closer to the one pressed body is provided with an insertion hole into which a spring protrusion of the other base plate is inserted in a state of penetrating therethrough in the first direction. Among portions in an along-plane direction along a plane orthogonal to the first direction provided with the spring protrusions, the spring constant of at least one portion is different from that of another portion.

公开(公告)号：US20190353227A1

公开(公告)日：2019-11-21

申请号：US16529137

申请日：2019-08-01

Applicant: DAIDO KOGYO CO., LTD. ,  NHK SPRING CO., LTD.

Inventor： Hideaki SEKI ,  Yoshio YAMADA ,  Takao KOBAYASHI ,  Kazuhito HIRAOKA ,  Shuji TAKAHASHI

IPC: F16H7/08

Abstract: A tensioner includes a power spring, and a backup member being in contact with the power spring and supporting the power spring by acting an urging force in a direction opposite to a radial shift of the power spring in a direction in which the power spring is wound. The power spring is unwound in a condition in which an inter-plate frictional force of the power spring is small in a case where an urging force acting from a power spring to a tension member is greater than a load acting from the tensioner arm to the power spring and the power spring is wound in a condition in which the inter-plate frictional force of the power spring is large in a case where the urging force acting from the power spring to the tension member is smaller than the load acting from the tension member to the power spring.

公开(公告)号：US20240431058A1

公开(公告)日：2024-12-26

申请号：US18706163

申请日：2022-10-31

Applicant: NHK SPRING CO., LTD.

Inventor： Yoshio YAMADA ,  Yusuke TANABE ,  Shuji TAKAHASHI

IPC: H05K5/06 ,  G11B33/02 ,  G11B33/12

Abstract: A recording device comprises a base, a cover attached to the base, a gasket, a recessed portion provided on the base, wherein the gasket is provided with a tip end portion having an arc-shaped cross section in a free state, is compressed in a state that a center of the tip end portion in the free state is deviated from a center of an opening of the recessed portion in a width direction intersecting the compressing direction, and is in contact with at least one opening edge in the width direction of the recessed portion and an inner face of the recessed portion in the compressed state.

公开(公告)号：US20230400078A1

公开(公告)日：2023-12-14

申请号：US18033923

申请日：2021-10-15

Applicant: NHK SPRING Co., Ltd.

Inventor： Yoshio YAMADA ,  Hironobu IMAIZUMI ,  Norihiro TAJIMA ,  Shuji TAKAHASHI

IPC: F16F1/18

CPC classification number: F16F1/185 ,  F16F2228/007 ,  F16F2238/022

Abstract: The spring member (1, 2, 3) includes a conductive plate (11) and a support plate (12), the conductive plate is formed of a material in which at least one of electrical conductivity and thermal conductivity thereof is higher than that of a material forming the support plate, the support plate is formed of the material having a higher Young's modulus than that of the material forming the conductive plate, two end portions of the conductive plate in a second direction (X) are provided with first contact portions (13) that contact a first pressed body (W1), an intermediate portion of the conductive plate in the second direction is provided with a second contact portion (14) that contacts a second pressed body (W2), the two end portions of the conductive plate in the second direction are engaged with two end portions of the support plate in the second direction, an intermediate portion of the support plate in the second direction is provided with a third contact portion (15) that contacts the second contact portion, and the second contact portion is sandwiched between the third contact portion and the second pressed body in a first direction (Z).