Patents Assigned to NHK Spring Co., Ltd.
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Patent number: 11346859Abstract: A contact probe is conductive and capable of expanding/contracting along an axial line direction. The contact probe includes: a first contact member configured to contact one contact target; a second contact member configured to contact another contact target, and to house at least a portion of the first contact member; and a spring member configured to couple the first contact member and the second contact member in a manner capable of expansion/contraction with both end parts of the spring member. The spring member is wound in a helical shape, and at least a diameter of an outer circumference in one of the end parts held by the second contact member is larger than diameters of other portions. A diameter of an inner circumference of an end part of the second contact member on a side housing the first contact member is equal to or larger than a maximum diameter of the first contact member.Type: GrantFiled: March 29, 2018Date of Patent: May 31, 2022Assignee: NHK Spring Co., Ltd.Inventors: Kazuya Souma, Tsukasa Sakaguchi
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Patent number: 11339844Abstract: A seat member has a seat portion, a receiving surface of which comes into contact with a bearing surface of an end turn portion, a mounting shaft portion protruded from the receiving surface of the seat portion, and an enlarged diameter portion formed at the front end of the mounting shaft portion for guiding press-fitting, in a cross section along an axial direction of a coil spring, an outer diameter of the enlarged diameter portion is set larger than an inner diameter of the end turn portion and an axial length of the enlarged diameter portion is set so that at least a maximum diagonal length of the seat member is larger than an inter-element wire distance.Type: GrantFiled: March 26, 2019Date of Patent: May 24, 2022Assignee: NHK Spring Co., Ltd.Inventors: Mitsuteru Mimura, Norihiro Tajima, Yosuke Kawai, Shuji Takahashi
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Publication number: 20220146552Abstract: A contact probe includes a first plunger, a second plunger, a coil spring, and a pipe; the first plunger includes a first slide portion that slides along the inner periphery of the pipe; the second plunger includes a second slide portion that slides along the inner periphery of the pipe; and the coil spring includes: a first attachment portion that is attached to the first plunger and tightly wound; a second attachment portion that is attached to the second plunger and tightly wound; a coarsely wound portion; a first contact portion including one end connected to the first attachment portion and another end connected to the coarsely wound portion and contacting the pipe; and a second contact portion including one end connected to the coarsely wound portion and another end connected to the second attachment portion and contacting to the pipe.Type: ApplicationFiled: March 12, 2020Publication date: May 12, 2022Applicant: NHK Spring Co., Ltd.Inventors: Kazuya Soma, Masahiro Takahashi, Shuji Takahashi
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Publication number: 20220145956Abstract: 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.Type: ApplicationFiled: April 13, 2020Publication date: May 12, 2022Applicant: NHK SPRING CO., LTD.Inventors: Yosuke KAWAI, Shimpei KUROKAWA, Yuki HAYAKAWA
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Patent number: 11320461Abstract: A probe unit includes: a plurality of contact probes each of which has one end that is brought into contact with a contacting electrode, the one end being an end in a longitudinal direction; a first ground member connected to an external ground; a second ground member provided around each of the contact probes; a connecting member electrically connected to the first ground member, and electrically connected to one end of the second ground member; and a probe holder configured to hold the contact probes, the first ground member, the second ground member and the connecting member.Type: GrantFiled: July 12, 2018Date of Patent: May 3, 2022Assignee: NHK Spring Co., Ltd.Inventors: Kohei Hironaka, Tsuyoshi Inuma, Shuji Takahashi
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Patent number: 11318863Abstract: A vehicle seat including: a seat body configured to seat an occupant; a pressing mechanism that is provided at the seat body and is switchable between a pressing state, in which the pressing mechanism presses against the pelvis of a seated occupant, and a non-pressing state, in which the pressing mechanism does not press against the pelvis of a seated occupant; and a control section configured to control the pressing mechanism, in a state in which an occupant is sitting on the seat body, so as to alternate repeatedly between the pressing state and the non-pressing state.Type: GrantFiled: November 5, 2020Date of Patent: May 3, 2022Assignee: NHK SPRING CO., LTD.Inventors: Donghyoun Kim, Katsutoshi Imanari
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Patent number: 11308983Abstract: A plate material has a first portion, a second portion, and a fracture portion connecting the first portion and the second portion, and is separated into the first portion and the second portion by tearing the fracture portion. The first portion and the second portion are arranged in a first direction. The fracture portion has thin portions arranged in a second direction crossing the first direction. Widths in the second direction of the thin portions are different from each other.Type: GrantFiled: November 23, 2020Date of Patent: April 19, 2022Assignee: NHK SPRING CO., LTD.Inventor: Masaru Inoue
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Patent number: 11299068Abstract: A vehicle seat is provided including a base section fixed to a floor of a vehicle, a pair of seat sections that are disposed opposing each other as viewed along a seat width direction, that are each supported by the base section so as to be capable of tilting between a horizontal position and an upright position, and that each include plural cushion sections disposed in series and configured to support the body of an occupant, and a hinge mechanism that attaches the pair of seat sections to the base section such that the seat sections are capable of tilting, and that couples the plural cushion sections together such that the cushion sections are capable of swinging about an axis running along the seat width direction.Type: GrantFiled: January 9, 2020Date of Patent: April 12, 2022Assignee: NHK Spring Co., Ltd.Inventors: Daisuke Tanaka, Kenichi Katsube, Donghyoun Kim, Takuma Oki
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Patent number: 11293946Abstract: A conductive contactor unit includes: a signal conductive contactor configured to input or output a signal to or from a predetermined circuit structure, the signal conductive contactor including a first plunger, a second plunger, and a spring member; and a conductive contactor holder configured to house the signal conductive contactor used for inputting and outputting the signal to and from the predetermined circuit structure, the conductive contactor holder having a coaxial structure with the signal conductive contactor, and including a holder substrate including an opening configured to allow the signal conductive contactor to be inserted therethrough, a holding member housed in the opening, and including a holding hole configured to hold one or more of the signal conductive contactors, and a stab configured to form a hollow space extending from the holding hole in a direction perpendicular to a central axis of the holding hole.Type: GrantFiled: June 14, 2018Date of Patent: April 5, 2022Assignee: NHK Spring Co., Ltd.Inventors: Kohei Hironaka, Tsuyoshi Inuma
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Publication number: 20220097357Abstract: A method of manufacturing a disk drive suspension includes applying an adhesive to an actuator mounting portion, increasing viscosity of the adhesive by emitting light to the adhesive applied to the actuator mounting portion, arranging the piezoelectric element on the adhesive having the increased viscosity, detecting a height of the piezoelectric element arranged on the actuator mounting portion, and correcting an irradiation condition of the light in accordance with the detected height of the piezoelectric element.Type: ApplicationFiled: September 27, 2021Publication date: March 31, 2022Applicant: NHK SPRING CO., LTD.Inventor: Kenichiro NAKANO
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Publication number: 20220101876Abstract: An adhesive reactive to ultraviolet rays is applied to an actuator mounting portion of a suspension. An electrical conducting material is applied to a conductor and the like of the actuator mounting portion. When the adhesive is irradiated with ultraviolet rays, the viscosity of the adhesive is increased. A piezoelectric element is placed on the adhesive the viscosity of which is increased. Thereafter, the adhesive and the electrical conducting material are heated, whereby the adhesive and the electrical conducting material are cured.Type: ApplicationFiled: September 28, 2021Publication date: March 31, 2022Applicant: NHK SPRING CO., LTD.Inventor: Shogo OGAKI
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Patent number: 11285776Abstract: A terminal sealed portion is formed on an end portion of a hollow rod made of steel. An enclosed space is formed on an inner side of the hollow rod. At an end of the enclosed space, a terminal gap is formed. A volatile powdered rust inhibitor is supplied in the enclosed space. As the volatile powdered rust inhibitor is vaporized, the enclosed space is turned into a rust-inhibiting atmosphere. As the vaporized component of the volatile powdered rust inhibitor is adsorbed to an inner surface of the enclosed space, an inner surface rust-inhibiting film is formed. The vaporized component also enters inside the terminal gap, and forms a terminal rust-inhibiting film.Type: GrantFiled: September 28, 2018Date of Patent: March 29, 2022Assignee: NHK SPRING CO., LTD.Inventors: Akira Tange, Masato Sugawara, Yutaka Wakabayashi
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Patent number: 11286972Abstract: A fastening member includes a screw thread formed therein. A portion including a crest portion of the screw thread is formed of a first alloy material and includes: a thick portion where the portion is maximized in thickness in a circumferential direction; and a thin portion where the portion is minimized in thickness in the circumferential direction. A portion including a root of the screw thread is formed of a second alloy material having a tensile strength higher than that of the first alloy material.Type: GrantFiled: March 2, 2018Date of Patent: March 29, 2022Assignee: NHK SPRING CO., LTD.Inventors: Noriyoshi Kaneda, Takeshi Suzuki
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Patent number: 11279990Abstract: An aluminum alloy contains 0.7% to 1.8% of silicon, 0.5% to 2.1% of copper, 0.4% to 1.8% of manganese, 0.6% to 1.6% of magnesium, and 0.1% to 0.7% of zinc in terms of mass ratio and the balance aluminum with inevitable impurities.Type: GrantFiled: February 16, 2017Date of Patent: March 22, 2022Assignees: NHK SPRING CO., LTD., TOPURA CO., LTD.Inventors: Noriyoshi Kaneda, Takeshi Suzuki, Kouhei Miyamoto, Naoki Horiuchi
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Patent number: 11280807Abstract: An insulation resistance measurement device includes a jig unit, a control unit and a transfer mechanism. The jig unit includes a lower jig having a reference surface, an upper jig having an abutting surface, a probe unit and a servomotor. When the upper jig is lowered toward the lower jig by the servomotor, the probe contacts a portion to be measured. When the upper jig is lowered further and the abutting surface of the upper jig abuts the reference surface, a torque of the servomotor increases. When the torque reaches a predetermined value, an insulation resistance is measured by the probe in a state where the torque is maintained.Type: GrantFiled: December 29, 2020Date of Patent: March 22, 2022Assignee: NHK SPRING CO., LTD.Inventor: Ryosuke Nagano
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Patent number: 11267381Abstract: There is provided a vehicle seat including: a seat back frame standing from a seat rear end side of a seat cushion, a left and right pair of cushion frames, the seat back frame being supported to be tiltable in a seat front-and-rear direction, and the seat back frame structuring a framework of a seat back; and a seat back panel that is provided at the seat rear side of the seat back frame, an upper frame structuring an upper end portion at the seat rear side of the seat back frame, an upper end portion of the seat back panel being disposed at the seat upper side relative to the upper frame, and the seat back panel displacing toward the seat lower side when an impact load is applied from the upper side of the seat back.Type: GrantFiled: March 20, 2020Date of Patent: March 8, 2022Assignee: NHK Spring Co., Ltd.Inventors: Takehiro Watanabe, Tomoharu Nakamura
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Publication number: 20220065713Abstract: A stress detection device includes: a first detector including a first magnetostrictive member configured to be deformed by tensile stress or compression stress in accordance with a load from outside, and a first wound portion made of a conductive material and configured to be wound around the first magnetostrictive member; and a second detector including a second magnetostrictive member having a magnetostrictive constant different from a magnetostrictive constant of the first magnetostrictive member, the second agnetostrictive member being configured to be deformed by tensile stress or compression stress in accordance with a load from outside, and a second wound portion made of a conductive material and configured to be wound around the second magnetostrictive member, wherein the first detector and the second detector are configured to electrically detect strength of magnetic permeability due to compression stress or tensile stress, and output detection signals having opposite signals.Type: ApplicationFiled: December 2, 2019Publication date: March 3, 2022Applicant: NHK Spring Co., Ltd.Inventors: Hiroyuki Taneda, Kenichiro Tami, Minoru Komiya
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Patent number: 11255351Abstract: An accumulator includes a pressure vessel including a first section and a second section joined to each other via a joint portion and a partition portion separating an interior space of the pressure vessel into a liquid chamber and a gas chamber so that a volume ratio between the liquid chamber and the gas chamber in the pressure vessel is variable. The first section includes a thread portion for fastening the accumulator to a support member. The second section includes an abutting portion disposed opposite to the thread portion across the joint portion in an axial direction of the thread portion and configured to abut on the support member when the accumulator is fastened to the support member.Type: GrantFiled: January 25, 2018Date of Patent: February 22, 2022Assignee: NHK SPRING CO., LTD.Inventors: Hiroshi Mizukami, Mieko Yanagida, Ippei Iwai
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Patent number: 11254177Abstract: A hollow coil spring is made of a hollow wire in which a terminal sealed portion is formed on an end portion of the wire. The terminal sealed portion has a rotationally symmetric shape in which an axis passing through the center of the wire is the symmetric axis. The hollow coil spring includes an end wall portion, and an end face arc-shaped curved surface. The end wall portion includes an end face perpendicular to the axis. A distal-end-center closure portion is formed on the axis at the center of the end wall portion. A spring seat includes a base member and a sheet member. An end turn portion of the hollow coil spring is in contact with the sheet member. The end face of the end turn portion is opposed to a stopper wall of the spring seat.Type: GrantFiled: September 27, 2018Date of Patent: February 22, 2022Assignee: NHK SPRING CO., LTD.Inventors: Masahiro Umezawa, Daisuke Takeda
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Publication number: 20220041027Abstract: A method of manufacturing a hollow coil spring which is made of a hollow wire in which a terminal sealed portion is formed on an end portion of the wire. The terminal sealed portion has a rotationally symmetric shape in which an axis passing through the center of the wire is the symmetric axis. The hollow coil spring includes an end wall portion, and an end face arc-shaped curved surface. The end wall portion includes an end face perpendicular to the axis. A distal-end-center closure portion is formed on the axis at the center of the end wall portion. A spring seat includes a base member and a sheet member. An end turn portion of the hollow coil spring is in contact with the sheet member. The end face of the end turn portion is opposed to a stopper wall of the spring seat.Type: ApplicationFiled: October 26, 2021Publication date: February 10, 2022Applicant: NHK SPRING CO., LTD.Inventors: Masahiro UMEZAWA, Daisuke TAKEDA