US 12,435,997 B2
Magnetic field detection device, magnetic sensor module, magnetic control device, motor and transmission
Teiichiro Oka, Tokyo (JP); Ryoichi Menju, Tokyo (JP); Makoto Takahashi, Tokyo (JP); and Hiroyuki Hirano, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK Corporation, Tokyo (JP)
Filed on Jun. 29, 2023, as Appl. No. 18/343,952.
Claims priority of application No. 2022-111560 (JP), filed on Jul. 12, 2022.
Prior Publication US 2024/0019270 A1, Jan. 18, 2024
Int. Cl. G01D 5/14 (2006.01)
CPC G01D 5/14 (2013.01) 20 Claims
OG exemplary drawing
 
1. A magnetic field detection device comprising:
a magnetic field generation unit that generates a magnetic field;
a magnetic field detection unit that detects the magnetic field;
a first housing that has an accommodation unit that accommodates the magnetic field detection unit; and
a second housing that movably accommodates a moving body;
wherein the strength or angle of the magnetic field generated from the magnetic field generation unit and applied to the magnetic field detection unit changes in accordance with movement of the moving body;
the second housing has a mounting unit on which the first housing is mounted;
the mounting unit has a flat surface facing the first housing;
the accommodation unit has, on one side of the accommodation unit facing the second housing, an opening;
the first housing is mounted on the mounting unit via a seal member that surrounds the magnetic field detection unit, so that the mounting unit is sandwiched between the magnetic field detection unit and the moving body and the opening of the accommodation unit faces the flat surface of the mounting unit; and
the inside of the accommodation unit is sealed by closing the opening of the accommodation unit with the seal member and the flat surface of the mounting unit.