Patent ID: 11946495
Assignee: SMC CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  G | IPC F

Claim 5:
6. A fluid pressure cylinder configured to detect that a piston is in a predetermined position, by detecting a magnetic field of a magnet mounted on the piston, using a first magnetoresistive sensor, a second magnetoresistive sensor, and a third magnetoresistive sensor mounted on a cylinder tube, wherein
the first magnetoresistive sensor, the second magnetoresistive sensor, and the third magnetoresistive sensor are each a combination of a first magnetoresistive effect element pattern in which a resistance value thereof decreases according to an intensity of the magnetic field oriented in a direction parallel to an axial direction of the piston, and a second magnetoresistive effect element pattern in which a resistance value thereof decreases according to an intensity of the magnetic field oriented in a direction parallel to a radial direction of the piston, and the first magnetoresistive sensor, the second magnetoresistive sensor, and the third magnetoresistive sensor are arranged alongside one another at a predetermined interval in the direction parallel to the axial direction of the piston in a manner so that, when the first magnetoresistive sensor mainly receives a magnetic field component of the magnet oriented in the direction parallel to the axial direction of the piston, the second magnetoresistive sensor and the third magnetoresistive sensor mainly receive a magnetic field component of the magnet oriented in the direction parallel to the radial direction of the piston.