| 摘要 |
The invention relates to a wireless keyboard capable of operating with a radiation-based signal receiver of a computing apparatus. The wireless keyboard includes a radiation-based signal transmitter functions converting a corresponding key signal into a radiation beam and emitting the radiation beam. The wireless keyboard also includes a user-adjustable guiding device having a first end and a second end. The first end abuts on the radiation-based signal transmitter such that the radiation beam emitted by the radiation-based signal transmitter enters into the guiding device from the first end. The guiding device also leads the radiation beam out from the second end. The radiation beam, led out from the second end of the guiding device, has a covered zone. When the keyboard operates with the radiation-based signal receiver, the second end of the guiding device approaches the radiation-based signal receiver by adjusting the guiding device such that the radiation-based signal receiver is located in the covered zone of the radiation beam.
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