Position detection device and brake pedal device

A position detection device for detecting a position of a rotating body that is rotatably or oscillatably provided around a predetermined axis center with respect to a fixed body, the position detection device comprising:

• a target formed of a conductor and fixed to the rotating body;
• an inductive coil fixed to the fixed body at a position facing the target in an axis center direction;
• a transmitting and receiving circuit configured to detect a position of the target based on a change in inductance of the inductive coil that changes due to an eddy current flowing through the target when an alternating current is applied to the inductive coil;
• a magnetic circuit section formed in a cylindrical shape around the axis center, fixed to the rotating body, and forming a magnetic field in which magnetic flux flies in a direction intersecting the axis center;
• a magnetic detection section fixed to the fixed body and provided in a region on a radially inner side than an inner circumferential surface of the magnetic circuit section, and configured to output a signal according to a magnetic field formed by the magnetic circuit section;
• and
• a circuit board on which the magnetic detection section, the inductive coil and the transmitting and receiving circuit are mounted, wherein
• an inductive sensor is configured by the target, the inductive coil, and the transmitting and receiving circuit,
• a magnet type rotation angle sensor is configured by the magnetic circuit section and the magnetic detection section,
• the circuit board is provided on a surface of the fixed body facing the magnetic circuit section, and
• the magnetic detection section is provided so as to extend from the circuit board to a region on the radially inner side of the magnetic circuit section.

A position detection device for detecting a position of a rotating body that is rotatably or oscillatably provided around a predetermined axis center with respect to a fixed body, the position detection device comprising:

• a target formed of a conductor and fixed to the rotating body;
• an inductive coil fixed to the fixed body at a position facing the target in an axis center direction;
• a transmitting and receiving circuit configured to detect a position of the target based on a change in inductance of the inductive coil that changes due to an eddy current flowing through the target when an alternating current is applied to the inductive coil;
• a magnetic circuit section formed in a cylindrical shape around the axis center, fixed to the rotating body, and forming a magnetic field in which magnetic flux flies in a direction intersecting the axis center;
• a magnetic detection section fixed to the fixed body and provided in a region on a radially inner side than an inner circumferential surface of the magnetic circuit section, and configured to output a signal according to a magnetic field formed by the magnetic circuit section;
• and
• a resin section configured integrally with the magnetic circuit section and the target inserted in resin, wherein
• an inductive sensor is configured by the target, the inductive coil, and the transmitting and receiving circuit, and
• a magnet type rotation angle sensor is configured by the magnetic circuit section and the magnetic detection section.

A position detection device for detecting a position of a rotating body that is rotatably or oscillatably provided around a predetermined axis center with respect to a fixed body, the position detection device comprising:

• a target formed of a conductor and fixed to the rotating body;
• an inductive coil fixed to the fixed body at a position facing the target in an axis center direction;
• a transmitting and receiving circuit configured to detect a position of the target based on a change in inductance of the inductive coil that changes due to an eddy current flowing through the target when an alternating current is applied to the inductive coil;
• a magnetic circuit section formed in a cylindrical shape around the axis center, fixed to the rotating body, and forming a magnetic field in which magnetic flux flies in a direction intersecting the axis center;
• and
• a magnetic detection section fixed to the fixed body and provided in a region on a radially inner side than an inner circumferential surface of the magnetic circuit section, and configured to output a signal according to a magnetic field formed by the magnetic circuit section, wherein
• an inductive sensor is configured by the target, the inductive coil, and the transmitting and receiving circuit,
• a magnet type rotation angle sensor is configured by the magnetic circuit section and the magnetic detection section, and
• the target is arranged in a region on a radially inner side than an inner circumferential surface of the magnetic circuit section.