MAGNETIC SENSOR DEVICE AND POSITION DETECTOR

• Main Authors: OSADA KOTA, MOMOSE SHOGO
• Format: Patent
• Language: English; Japanese
• Published: 22.08.2019
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

To provide a magnetic sensor device equipped with a circuit board on which electronic components are mounted, in which magnetic influences from the circuit board on a magnetic sensor element are reduced.SOLUTION: A magnetic encoder device 1 includes a magnetic sensor device 3 that moves relatively to a magnetic scale 2. In a first case 6 of the magnetic sensor device 3 that holds a sensor substrate 11 on which a magnetoresistive element 12 is mounted, are accommodated a first circuit board 31 and a second circuit board 32 on which electronic components for processing the signal of the magnetoresistive element 12 are mounted. A shield member 20 is arranged at the bottom of the first case 6. The shield member 20 is arranged between the first and second circuit boards 31, 32 and the sensor substrate 11, so that it is possible to reduce magnetic influences from the electronic components on the magnetoresistive element 12.SELECTED DRAWING: Figure 3 【課題】電子部品を搭載した回路基板を備えた磁気センサ装置において、磁気センサ素子に対する回路基板からの磁気的影響を低減させること。【解決手段】磁気式エンコーダ装置１は、磁気スケール２に対して相対移動する磁気センサ装置３を備える。磁気センサ装置３は、磁気抵抗素子１２を搭載したセンサ基板１１を保持する第１ケース６に、磁気抵抗素子１２の信号を処理する電子部品が搭載された第１回路基板３１および第２回路基板３２を収容している。第１ケース６の底部にはシールド部材２０が配置されている。シールド部材２０は、第１回路基板３１および第２回路基板３２と、センサ基板１１との間に配置されているので、磁気抵抗素子１２に対する電子部品からの磁気的影響を低減させることができる。【選択図】図３