Sensor

Patent metadata

Field	Value
Publication number	US-2019288685-A1
Application number	US-201916251086-A
Country	US
Kind code	A1
Filing date	Jan 18, 2019
Priority date	Mar 13, 2018
Publication date	Sep 19, 2019
Grant date	—

Abstract

A sensor includes a housing and an antenna element. The first wall and the second wall of the housing are facing each other at a distance from each other. The third wall and the fourth wall connect the first wall and the second wall and are facing at a distance from each other and have a larger area than the first wall and the second wall respectively. The housing has an internal space surrounded by the first wall, the second wall, the third wall, and the fourth wall. The antenna element is arranged in the internal space of the housing and receives identification information of an external actuator for detecting opening/closing of a door. The antenna element is arranged at a position, which is closer to the first wall than the second wall and includes a substantially center in a direction connecting the third wall and the fourth wall.

First claim

What is claimed is:

1 . A sensor comprising:
a housing comprising a first wall, a second wall, a third wall, a fourth wall, and an internal space, wherein the first wall and the second wall are facing each other at a distance from each other, the third wall and the fourth wall connect the first wall and the second wall and are facing each other at a distance from each other and have a larger area than the first wall and the second wall respectively, and the internal space is surrounded by the first wall, the second wall, the third wall, and the fourth wall; and an antenna element arranged in the internal space of the housing and receiving identification information of an external actuator for detecting opening/closing of a door, wherein the antenna element is arranged at a position, which is closer to the first wall than the second wall and includes a substantially center in a direction connecting the third wall and the fourth wall.

2 . The sensor according to claim 1 , wherein in the internal space of the housing, the sensor comprises:
a main circuit substrate having a flat plate shape and parallel to the third wall or the fourth wall; an antenna mounting substrate arranged parallel to a surface of the first wall, wherein the antenna element is mounted on the antenna mounting substrate; and a connecting member physically and electrically connecting the main circuit substrate and the antenna mounting substrate.

3 . The sensor according to claim 1 , wherein the antenna element is omni-directional or has a directivity in a direction orthogonal to a surface of the first wall, a surface of the third wall, and a surface of the fourth wall.

4 . The sensor according to claim 1 , wherein a length of the first wall in a direction parallel to the third wall and the fourth wall is greater than a length of the first wall in a direction orthogonal to the third wall and the fourth wall, and
the antenna element has a rod shape in which a length in a direction parallel to the first wall, the third wall, and the fourth wall is greater than a length in a direction orthogonal to the third wall and the fourth wall.

Assignees

• Omron Tateisi Electronics Co

Inventors

• Murakami Kohei
• Kudo Kazuhiro
• Yayama Keishi
• Ichiki Toshiaki

Classifications

• H01H36/00

  Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding · CPC title

• H01Q1/22

  by structural association with other equipment or articles · CPC title

• H01Q1/36

  Structural form of radiating elements, e.g. cone, spiral, umbrella; {Particular materials used therewith}(H01Q1/08, H01Q1/14 take precedence) · CPC title

• G01R1/02

  General constructional details · CPC title

• E05Y2400/852

  Sensors · CPC title