Minebea Mitsumi Inc.

Yosuke Ogasa

Atsushi Kitamura

Toshiaki Asakawa

Akiyo Yuguchi

Aya Ono

Shigeyuki Adachi

Eiji Misaizu

Shinya Toda

Yuta Aizawa

Iku Ishihara

A strain gauge includes a flexible substrate and a resistor formed of material including at least one of chromium or nickel, the resistor being situated above the substrate. The strain gauge includes a functional layer formed of an insulating material that has a higher thermal conductivity than the resistor, the functional layer being situated between the substrate and the resistor. The resistor includes multiple resistive patterns that are juxtaposed. The resistor includes folded portions each of which connects end portions of resistive portions that are next to each other. A first metallic layer formed of a material that has a higher thermal conductivity than the resistor is laminated on the folded portions.

Strain gauge

A strain gauge includes a substrate, a resistor formed on the substrate, and two lines. The resistor includes multiple elongated portions. Each of the lines includes a first metal layer and a second metal layer that is laminated on the first metal layer and is formed of a material having lower volume resistivity than the first metal layer. In plan view, an outer edge of the first metal layer is exposed from the second metal layer. In plan view, an end of the second metal layer on a first end side in a first direction protrudes further toward the first end side in the first direction than an end of a space that is situated between the first metal layer and an elongated portion adjacent to the first metal layer.

The present vital sensor is a vital sensor configured to monitor a blood flow, and includes a strain generator to be attached to a measurement site in a subject, and a strain gauge disposed on the strain generator. The strain gauge includes three or more resistors. With a first direction being a direction in which a blood vessel extends in the measurement site and a second direction being a direction orthogonal to the first direction, the strain generator is attached to the measurement site so that positions of at least three of the resistors in the first direction are different from each other, and the positions of the at least three of the resistors in the second direction are different from each other.

Vital sensor

A strain gauge includes a flexible substrate; a functional layer formed of a metal, an alloy, or a metal compound, on one surface of the substrate; a resistor formed of a Cr composite film, on one surface of the functional layer; and an insulating resin layer with which the resistor is coated.

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Kanagawa, Japan

Yosuke Ogasa