LIQUID-LEVEL DETECTION DEVICE

摘要

A liquid-level detection device includes a rotatable body that rotates in accordance with a liquid surface, a fixation body that includes a main body part fixed to a container and a supporting part projecting from the main body part in an axial direction along a rotation axis of the rotatable body to rotatably support the rotatable body, a pair of magnet parts that are held by the rotatable body in an arrangement positioning the supporting part therebetween and that generates a magnetic flux passing through the supporting part, and a detecting part that includes a magnetoelectric conversion device disposed in the supporting part and that outputs a detection result according to a density of the magnetic flux passing through the magnetoelectric conversion device. The rotatable body includes a magnetic shield member entirely covering a projection region of a space located between the pair of magnet parts, which is projected outward in the axial direction, to limit leakage of the magnetic flux. The magnetic shield member is located outward of the supporting part and the pair of magnet parts in the axial direction to include an exposed surface which is exposed into the container.

主权项

1. A liquid-level detection device for detecting a level of a surface of liquid stored in a container, comprising:
a rotatable body that rotates in accordance with the surface of liquid; a fixation body that includes:
a main body part fixed to the container; anda supporting part projecting from the main body part in an axial direction along a rotation axis of the rotatable body to rotatably support the rotatable body; a pair of magnet parts that are held by the rotatable body in an arrangement positioning the supporting part therebetween and that generates a magnetic flux passing through the supporting part; and a detecting part that includes a magnetoelectric conversion device disposed in the supporting part and that outputs a detection result according to a density of the magnetic flux passing through the magnetoelectric conversion device, wherein:
the rotatable body includes a magnetic shield member entirely covering a projection region of a space located between the pair of magnet parts, which is projected outward in the axial direction, to limit leakage of the magnetic flux; andthe magnetic shield member is located outward of the supporting part and the pair of magnet parts in the axial direction to include an exposed surface which is exposed into the container.