Music box for reducing misalignment of wheels

摘要

A music box includes a star wheel, a stopper, a sun wheel, a motor, a sensor, and a controller. The star wheel is configured to rotate about a first shaft. The sun wheel is fixed on a second shaft and engages the star wheel. The motor is configured to rotate the first shaft and the second shaft. The sensor is configured to detect a rotation state of the sun wheel. The controller is configured to: read a music data; control the motor to rotate at a rotational speed based on a temp; determine a start timing at which the stopper starts to release the star wheel based on a sound output timing and the rotation state; calibrate the start timing to a calibrated start timing based on a value related to the rotational speed; and control the stopper to release the star wheel at the calibrated start timing.

主权项

1. A music box comprising:
a star wheel configured to rotate about a first shaft, the star wheel comprising a claw; a stopper configured to halt a rotation of the star wheel; a sun wheel fixed on a second shaft extending along the first shaft, the sun wheel being configured to engage the star wheel which has been released from a halt by the stopper; a motor configured to rotate the first shaft and the second shaft; a sensor configured to detect a rotation state of the sun wheel; and a controller configured to:
read a music data specifying a sound output timing and a tempo from a storage unit;control the motor to rotate at a rotational speed based on the tempo of the music data;determine a start timing at which the stopper starts to release a halt of the rotation of the star wheel based on the sound output timing and the rotation state of the sun wheel detected by the sensor;calibrate the start timing to a calibrated start timing based on a value related to the rotational speed of the motor;control the stopper to release the halt of the rotation of the star wheel at the calibrated start timing, andchange the tempo from a first tempo to a second tempo slower than the first tempo and calibrate the start timing to the calibrated start timing later than the start timing when the tempo is changed from the first tempo to the second tempo.