Switch structure and explosion-proof device
AssigneeAzbil Corporation
InventorsYoshiro Honda, Takashi Watanabe
Life of this patent
Estimating the term…
Abstract
A switch that includes a hermetically sealed container including a container wall separating an inside of the hermetically sealed container from an outside of the hermetically sealed container, a magnetic sensor arranged in the hermetically sealed container and configured to be turned ON/OFF by a magnetic field of a magnet acting from the outside of the hermetically sealed container through the container wall of the hermetically sealed container, and a first magnetic body provided at the container wall of the hermetically sealed container and serving as a path of the magnetic field acting on the magnetic sensor from the magnet.
Claims23
A switch, comprising:
- a hermetically sealed container including a container wall separating an inside of the hermetically sealed container from an outside of the hermetically sealed container;
- a magnetic sensor arranged in the hermetically sealed container and configured to be turned ON/OFF by a magnetic field of a magnet acting from the outside of the hermetically sealed container through the container wall of the hermetically sealed container;
- a first magnetic body provided at the container wall of the hermetically sealed container;
- and
- a second magnetic body facing the first magnetic body and the magnetic sensor, wherein
- the first magnetic body and the second magnetic body serves as a path of the magnetic field acting on the magnetic sensor from the magnet.
A switch, comprising:
- a hermetically sealed container including a container wall separating an inside of the hermetically sealed container from an outside of the hermetically sealed container;
- a magnetic sensor arranged in the hermetically sealed container and configured to be turned ON/OFF by a magnetic field of a magnet acting from the outside of the hermetically sealed container through the container wall of the hermetically sealed container;
- a first magnetic body provided at the container wall of the hermetically sealed container and serving as a path of the magnetic field acting on the magnetic sensor from the magnet;
- a substrate provided with the magnetic sensor;
- a substrate holding member provided in the hermetically sealed container to hold the substrate to cause a surface of the substrate provided with the magnetic sensor to face the container wall of the hermetically sealed container, and to cover a space above the magnetic sensor provided on the substrate;
- and
- a second magnetic body provided at the substrate holding member and facing the first magnetic body and the magnetic sensor,
- wherein a gap is provided between the first magnetic body and the second magnetic body.
A sealed electronic device comprising:
- a switch including
- a hermetically sealed container including a container wall separating an inside of the hermetically sealed container from an outside of the hermetically sealed container;
- a magnetic sensor arranged in the hermetically sealed container and configured to be turned ON/OFF by a magnetic field of a magnet acting from the outside of the hermetically sealed container through the container wall of the hermetically sealed container;
- a first magnetic body provided at the container wall of the hermetically sealed container;
- and
- a second magnetic body facing the first magnetic body and the magnetic sensor;
- and
- an electronic device configured to be controlled by the magnetic sensor, the electronic device being electrically connected to the magnetic sensor and provided inside the hermetically sealed container, wherein
- the first magnetic body and the second magnetic body serves as a path of the magnetic field acting on the magnetic sensor from the magnet.
Dependencies are inferred from the claim text.