Seiko Instruments Inc

Sachiko Tanabe

Manabu Oumi

Masakazu Hirata

Norio Chiba

Yoko Shinohara

Yoshikazu Tanaka

Takashi Niwa

Masahiro Nakajima

Hiroshi Muramatsu

Masayuki Suda

Majung Park

To provide a mechanical component, a mechanical component manufacturing method, a movement, and a timepiece allowing the forcing-in portion to be firmly fixed to the shaft member, providing a sufficient buffer effect, and capable of precisely determining the outer diameter dimension. Provided is a mechanical component rotating around a shaft member. This mechanical component includes: a component main body having a through-hole through which the shaft member is passed; and a forcing-in portion formed on the inner surface of the through-hole and fixed to the shaft member through the forcing-in of the shaft member. The component main body has a retaining recess constituting an anchor structure regulating displacement of the forcing-in portion with respect to the component main body. The forcing-in portion is formed of a metal material.

Mechanical component, mechanical component manufacturing method, movement, and timepiece

A mechanical component includes a component main body having a through-hole through which a shaft member is passed, and a forcing-in portion made of metal material formed on the inner surface of the through-hole and fixed to the shaft member through the forcing-in of the shaft member. The component main body has a retaining recess and the forcing-in portion fills the inner space of the retaining recess so that the retaining recess constitutes an anchor structure regulating displacement of the forcing-in portion with respect to the component main body.

Mechanical component, movement, and timepiece

A mechanical component configured to rotate with a shaft member includes a component main body having a through-hole through which the shaft member is passed, and one or more shaft support portions formed on the inner surface of the through-hole to fix the shaft member to the component main body. The one or more shaft support portions protrude from the inner surface of the through-hole and are capable of retaining the shaft member due to an elastic force. The one or more shaft support portions are made of material having a larger elongation percentage than that of the material of the component main body thereby preventing breakage of the mechanical component due to stress created when the shaft member is forced through the through-hole in the component main body.

A piezoelectric unitincludes a piezoelectric element that causes thickness shear vibration, a first electrode provided on one surface of the piezoelectric element, a second electrode and a third electrode which are provided on an opposite surface to the one surface which is provided with the first electrode of the piezoelectric element and are electrically insulated from each other, and a switching portion that is connected to the first electrode, the second electrode, and the third electrode, in which the switching portion can switch measurement modes between a mass/viscoelasticity measurement mode for measuring mass of a substance which is in contact with the piezoelectric element or viscoelasticity by vibrating the piezoelectric element, and an electrical characteristic measurement mode for measuring electrical characteristics between the second electrode and the third electrode.

Piezoelectric unit, piezoelectric device, piezoelectric determination apparatus, and state determination method

A QCM sensor for detecting a physical quantity of a sample includes a quartz crystal vibrator for measurement, a quartz crystal vibrator for reference, and a housing accommodating the quartz crystal vibrator for measurement and the quartz crystal vibrator for reference. The quartz crystal vibrator for measurement has a first electrode that is contacted by a measurement sample to be detected, and a first quartz substrate provided with a surface on which the first electrode is formed. The quartz crystal vibrator for reference has a second electrode that is contacted by a reference sample as a reference when detecting a physical quantity of the measurement sample, and a second quartz substrate provided with a surface on which the second electrode is formed. A confining portion connects to the housing to confine the reference sample in a state of contacting the second electrode.

QCM sensor

A head gimbal assembly has a suspension configured to extend along a surface of a recording medium and to bend and deform in a thickness direction of the recording medium. A slider is provided on a front end side of the suspension so as to confront the surface of the recording medium. A support section supports the slider such that the slider can pivot about two axes parallel to the surface of the recording medium and perpendicular to each other. An optical waveguide is connected to the slider and is configured to introduce a light flux into the slider. A near-field light generating element generates near-field light from the optical flux and causes the near-field light to record information on the recording medium. A positioning section is mounted between the support section and the slider for positioning the optical waveguide relative to the slider.

Head gimbal assembly and data recording and reproducing apparatus having the same

A magnetic recording medium in which information can be recorded using a heat-assisted magnetic recording method comprises a recording layer formed on a substrate. The recording layer has a plurality of magnetic recording bit regions and a plurality of high thermal conductors each extending inside a corresponding one of the bit regions. The high thermal conductors have a thermal conductivity higher than that of the recording layer and assist in dissipating heat energy imparted to the bit regions during the recording of information.

Magnetic recording medium

A U-shaped groove and a V-shaped groove are formed onto a cladding disposed on a substrate, a core and a metal structure are formed inside the grooves, respectively, and then the substrate surface is planarized. Further, after a cladding is formed again, the substrate is cut and the cut surface is polished such that the metal structure inside the V-shaped groove has a predetermined thickness, thereby forming a scattering body.

Method of manufacturing near-field light generating element and near-field light generating element

A near-field light generating element has a core that propagates light flux from a light incident side to a light emission side while focusing the propagating light flux. A near-field light generating portion in the form of a metal film generates near-field light from the light flux. The core includes a first core, and a second core covering a side surface of the first core, and the core is formed in a polygonal shape when viewed from a Z direction. The metal film is placed on a side surface in the core, and is formed so that a width of an interface between the metal film and the core is narrower than a width of the side surface of the core.

Near-field light generating element, method of manufacturing near-field light generating element, near-field light head, method of manufacturing near-field light head, and information recording and playback device

A head gimbal assembly has a flexure forming a part of a suspension configured to extend along a surface of a recording medium. A flexible substrate is provided on the flexure. A slider is mounted onto at least a part of the flexible substrate so as to oppose the surface of the recording medium, and is configured to generate near field light from an introduced light flux. A light supply portion is mounted on the flexure and is provided between the flexure and the slider. The flexible substrate has an end surface forming a mirror surface that faces an end surface of the light supply portion and is inclined with respect to an optical axis of the light supply portion. The light supply portion is optically coupled to the slider via the mirror surface of the flexible substrate.

Head gimbal assembly using near-field light and information recording and reproducing apparatus including the same

A near-field light generating element has a core that guides a laser light in a direction of a disk while reflecting the laser light, and a cladding that encapsulates the core in an inner portion, and lengths of a longitudinal direction and a transverse direction of an incident side end surface of the laser light in the core are formed so as to match the lengths of a long axis direction and a short axis direction of the laser light that is entered to the core.

Recording head, method of manufacturing recording head, and information recording and playback apparatus

There are provided a head gimbal assembly and an information recording and reproducing apparatus capable of easily positioning a light guiding portion and a slider on a tongue portion and performing a stable recording and reproducing operation. A head gimbal assembly recording information on a recording medium using a near-field light includes: a suspension that extends along a surface of the recording medium so as to be deflectable in a thickness direction; a support portion that is provided at a tip end side of the suspension so as to be more deflectable in the thickness direction than the suspension; a light guiding portion that has a support-facing portion provided to the support portion so as to face the support portion and introduces a light flux used for generating the near-field light; and a 3-dimensional structure that is provided to the support portion and used for positioning the support-facing portion on a desired portion of the support portion, wherein the support-facing portion has a portion in which a width of a sectional surface thereof perpendicular in a longitudinal direction of the suspension is larger than a width of a contact surface that makes contact with the support portion.

Growing community of inventors

Chiba, Japan

Sachiko Tanabe