| 摘要 |
A dust-cleaning apparatus for a tracking ball includes a cover, a seat body, a tracking ball, and a dust-cleaning textile. The tracking ball rolls inside the seat body that is combined with the cover. Furthermore, a partially spherical surface of the tracking ball is exposed out of the seat body. The dust-cleaning textile is disposed between the seat body and the cover and has a hole for the tracking ball to pass through and compactly contact the dust-cleaning textile. Due to the compact contacting with the tracking ball, the dust-cleaning textile prevents foreign matter from attaching on to the spherical surface of tracking ball or from entering the seat body. Moreover, foreign matter is isolated outside the seat body so that the tracking ball can be used normally.
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