| 摘要 |
A wheel module for an input device includes a fixing shaft, a wheel and a swinging arm. The wheel has a recess or a hollow groove, so that a first saw-toothed structure and a second saw-toothed structure are formed within the wheel. When the contacting part of the swinging arm is contacted with the first saw-toothed structure, the wheel is operated in a first click-feeling mode. Whereas, when the contacting part of the swinging arm is contacted with the second saw-toothed structure, the wheel is operated in a second click-feeling mode.
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