US 11,808,648 B2
Magnetic sensor and torque sensing device having the same
Ken Tanaka, Kariya (JP); Toshiro Suzuki, Kariya (JP); and Shigetoshi Fukaya, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Aug. 20, 2021, as Appl. No. 17/408,250.
Application 17/408,250 is a continuation of application No. PCT/JP2020/006850, filed on Feb. 20, 2020.
Claims priority of application No. 2019-031658 (JP), filed on Feb. 25, 2019.
Prior Publication US 2021/0381915 A1, Dec. 9, 2021
Int. Cl. G01L 3/10 (2006.01); G01R 33/00 (2006.01); H05K 1/18 (2006.01); B62D 6/10 (2006.01)
CPC G01L 3/101 (2013.01) [G01R 33/0011 (2013.01); G01R 33/0047 (2013.01); H05K 1/183 (2013.01); B62D 6/10 (2013.01); H05K 2201/10151 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A magnetic sensor configured to output an electrical signal corresponding to a magnetic flux generated between a first magnetic circuit portion and a second magnetic circuit portion which are opposed to each other, the magnetic sensor comprising:
a sensor housing that has a receiving recess at one end portion of the sensor housing located at one end of the sensor housing, wherein the one end portion of the sensor housing is configured to face the first magnetic circuit portion and the second magnetic circuit portion;
a circuit board that is received in the receiving recess;
a magnetic sensing device that is installed to the circuit board and is configured to output the electrical signal which corresponds to the magnetic flux; and
a pair of magnetic flux guide members that are respectively made of a soft magnetic material and are configured to guide the magnetic flux to the magnetic sensing device, wherein the pair of magnetic flux guide members are opposed to each other while the magnetic sensing device is interposed between the pair of magnetic flux guide members, wherein:
the circuit board has:
an opening;
a front-side region which is located on a side of the opening where the one end of the sensor housing is placed; and
a rear-side region which is located on an opposite side of the opening that is opposite to the front-side region;
the magnetic sensing device has:
a main body which has a pair of side walls that are opposed to each other; and
a plurality of terminals which project outward from the pair of side walls such that one or more of the plurality of terminals project outward from one of the pair of side walls, and another one or more of the plurality of terminals project outward from another one of the pair of side walls;
the magnetic sensing device is installed to the circuit board such that the main body overlaps the opening in a normal direction that is perpendicular to a plane of the circuit board, wherein the one or more of the plurality of terminals projecting outward from the one of the pair of side walls is located at the front-side region, and the another one or more of the plurality of terminals projecting outward from the another one of the pair of side walls is located at the rear-side region;
one of the pair of magnetic flux guide members is placed in the opening;
the circuit board has:
a first section which is placed away from the one end of the sensor housing; and
a second section, which is placed on a side of the first section where the one end of the sensor housing is placed;
the opening is formed in the second section to form the front-side region and the rear-side region in the second section; and
a direction, in which the first section and the second section are aligned, is defined as an alignment direction, and a width of the second section, which is measured in a direction intersecting the alignment direction, is smaller than a width of the first section, which is measured in the direction perpendicular to the alignment direction.