LIQUID LEVEL DETECTOR

摘要

A liquid level detector includes a casing that is fixed to a container and includes a first regulatory section and a second regulatory section which are opposed to each other in a gravity direction, a float that floats on the liquid surface and has its upward and downward displacement along the gravity direction restricted by contact with the first regulatory section or the second regulatory section, a magnet body that extends along the gravity direction and is held by the float to be displaced upward or downward in conformity with the liquid surface, and a switch mechanism that is held by the casing and is switched between its on-state and off-state when one magnet end face of the magnet body in its extending direction is displaced in the gravity direction beyond a switching plane. The casing is assumed to be disposed in a first or second position. The float is arranged between the first regulatory section and the second regulatory section with a specific bottom end section directed in the gravity direction regardless of the disposing position of the casing. A first distance from the switching plane to the first regulatory section and a second distance from the switching plane to the second regulatory section are both longer than a length from the one magnet end face to the bottom end section.

主权项

1. A liquid level detector for detecting a level of a surface of liquid stored in a container, the detector comprising:
a casing that is fixed to the container and includes a first regulatory section and a second regulatory section which are opposed to each other in a gravity direction; a float that floats on the surface of liquid and has its upward and downward displacement along the gravity direction restricted by contact of the float with the first regulatory section or the second regulatory section; a magnet body that has a shape extending along the gravity direction and is held by the float to be displaced upward or downward in conformity with the surface of liquid; and a switch mechanism that is held by the casing, wherein:
when one magnet end face of the magnet body in its extending direction is displaced in the gravity direction beyond a predetermined virtual switching plane, the switch mechanism is switched from one to the other of its on-state and off-state;the casing is assumed to be disposed in a first position where the first regulatory section is located further in the gravity direction than the second regulatory section, and to be disposed in a second position where the second regulatory section is located further in the gravity direction than the first regulatory section;the float is arranged between the first regulatory section and the second regulatory section in a position where a specific bottom end section of the float is directed in the gravity direction regardless of whether the casing is disposed in the first position or in the second position; anda first distance from the switching plane to the first regulatory section and a second distance from the switching plane to the second regulatory section are both longer than a length from the one magnet end face to the bottom end section.