Nagano Keiki Co., Ltd.

Yukinobu Iimori

Shuji Tohyama

Takayuki Yokoyama

Nobuaki Yamada

Hironori Kobayashi

A sensor includes: a housing with a terminal; a joint including a projecting portion; a sensor module provided to the projecting portion and including a strain gauge; a conductive member connecting the terminal and the strain gauge; a cap-shaped synthetic resin base provided to the projecting portion, including a top with an opening in which the strain gauge is exposed and lateral portions intersecting the top, and having an inner circumferential surface slidable along an outer circumferential surface of the projecting portion; and an electronic component mounted on the lateral portions. The conductive member includes: a flexible circuit board having a first end connected to the terminal and a second end connected to the base; and a three-dimensional circuit connected to the electronic component, three-dimensionally arranged continuously along the top and the lateral portions of the base, and having one end connected to the flexible circuit board.

Synthetic resin based pressure sensor with a three-dimensional circuit

A cap is provided on a diaphragm, and a first end of a flexible board is connected to the cap. A cover is attached to the cap. The cover directs a second end of the flexible board in a direction away from the diaphragm held by a joint so that the flexible board is supported while being curved. Since the flexible board is not locally bent at an acute angle, a crack is not generated on a copper pattern provided on the flexible board.

Flexible board sensor and manufacturing method of sensor

A pressure sensor is provided with a cap on a measuring portion of a diaphragm to which a first end of a flexible board is connected while a second end of the flexible board is connected to a circuit board spaced apart from the diaphragm. The flexible board is provided with the first end, a belt portion that is bent at an angle of ninety degrees or more relative to the first end in a direction to be away from the circuit board and is curved along the outer circumference of the diaphragm, and the second end that is bent at an angle of ninety degrees or more relative to the belt portion to be connected to the circuit board.

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Tokyo, Japan

Yukinobu Iimori