Omron Corporation

Koro Kitajima

Hiroyuki Tsuchida

Takao Nakazaki

Kazuaki Miyamoto

Masahiko Shibayama

Chikashi Niimi

Kazuhiro Hayashi

Mitsuo Hatada

Kazushi Tanase

Hiroyuki Fujinaga

Arata Nakamura

Yasushi Matsuoka

Giichi Konishi

Shoichi Konishi

Toru Aoki

Shinjiro Kotani

Keijiro Shoji

Masayuki Kono

Takashi Otsuka

Masayuki Kitanaka

Yukio Yamaguchi

A proximity sensorcomprising a combination of an arbitrarily selected one of a plurality of types of detection end modules, a plurality of types of output circuit modulesand a plurality of types of outer shell cases. The detection end moduleincludes an integrated arrangement having a detection coil assembly () with the detection characteristic self-completed by a mask conductorfor reducing the conductor detection sensitivity in a specific peripheral area where the outer shell case is assumed to exist, and a detection circuit assembly () with the coil of the detection coil assembly as a resonance circuit element. The characteristics of the proximity sensor are completely adjusted before shipment. As a result, the adjustment of the characteristics which otherwise might be required each time is eliminated even in the case of the combination with an outer shell case of a different material. Thus, the commodity design and production are facilitated for a great variety of commodity specifications.

Proximity sensor

A coated electric wire is wound around a detection circuit in a planar manner for the purpose of electrostatic shield. This winding is performed, for example, spirally in a single layer. In the case where there are further provided a detection circuit board including a detection circuit and a cylindrical case, the coated electric wire is wound around the detection circuit board in a planar manner, wherein the direction of the axis of the cylindrical surface accords with the direction of the axis of the case. Consequently, there can be provided a sensor device in which the detection circuit can be electrostatically shielded with ease.

Sensor device with coated electric wire shielding

A connector has a conductive terminal assembly including a plug-adaptable conductive terminal electrically connected with a circuit assembly and a pin holder for holding the conductive terminal The terminal assembly is sized to be able to be inserted from the front-end side of an outer shell case A cylindrical holding member has openings at both ends to enable the conductive terminal assembly to be inserted, a joint to position the conductive terminal assembly to itself, and is fixed from the rear-end side of the outer shell case. In addition, the detection coil assembly and the conductive terminal assembly are electrically connected with each other via a flexible connection member.

A proximity sensor according to the present invention includes protrusions that are provided on a wire-winding drum of a coil spool around which a lead wire of a detection coil is wound, that protrude toward the center from not less than three points distributed in the range exceeding a semi-circle on the circumference of the wire-winding drum and that are elastically brought into contact with the shaft of the core, respectively, thereby coaxially positioning the coil spool and the shaft of the core.

Proximity sensor with improved positioning accuracy for detection coil peripheral members

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Suita, Japan

Koro Kitajima