| 摘要 |
A ball mouse includes a ball, two metallic encoder disks each defining a plurality of through holes, two drive rollers engaged with the ball and transferring motion of the ball to respective encoder disks, two electromagnetic signal generators for generating two electromagnetic signals, and two induced signal generators for generating two induced signals according to respective electromagnetic signals. One of the two electromagnetic signals is transmitted to one of the induced signal generators through the plurality of through holes of one of the encoder disks. The other of the two electromagnetic signals is transmitted to the other of the induced signal generators through the plurality of through holes of the other of the encoder disks.
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