Acceleration sensor and electronic device comprising the same

An acceleration sensor, comprising:

• a pair of cantilevers comprising two cantilevers arranged on a same straight line or almost in parallel in such a manner that positions of fixed ends and free ends are arranged to face in opposite directions from each other, and each of said free ends has a degree of freedom to deflect along a same direction as each other;
• a pair of magnetic field generating devices for generating a magnetic field in more than one direction mounted to each of said free ends of said pair of cantilevers, each of which is formed integrally with N-pole face and S-pole face facing in a same direction;
• and
• magnetic field detecting devices for detecting directions of magnetic fields, at least one each of which is arranged to oppose each of said N-pole face and said S-pole face of said magnetic field generating device, wherein
• each of said magnetic field detecting devices is formed by a magnetoresistive element whose resistance value changes in accordance with a direction of a magnetic field, and each of said magnetic field detecting device is arranged in such a manner that detectable magnetic field directions become identical.

An acceleration sensor, comprising:

• a pair of cantilevers comprising two cantilevers arranged substantially parallel on a same straight line in such a manner that positions of fixed ends and free ends are arranged to face in opposite directions from each other, and each of said free ends has a degree of freedom to deflect along a same direction as each other;
• a pair of magnetic field generating devices with one magnetic field generating device mounted respectively to each of said free ends for generating a magnetic field in more than one direction;
• and
• a pair of magnetic field detecting devices arranged to face each of said magnetic field generating devices, respectively, for detecting directions of said magnetic fields generated by each of said magnetic field generating devices, wherein:
• said pair of cantilevers have a degree of freedom in a twisting direction of said cantilevers;
• and
• another magnetic field detecting device, which detects a direction of a magnetic field that changes when said cantilevers are twisted, is provided by opposing at least one of said magnetic field generating devices.