| 摘要 |
A key carrier includes an electromagnetic wave transmitter and a key. The key is pivotally mounted within a drum rotatably mounted in the key case. When the drum is rotated so that an opening of the drum is in alignment with an opening of the case, a spring mounted between the key and the drum biases the key out of the case. When the drum is rotated so that the openings are out of alignment, a stop surface of the case retains the key within the drum. A second spring is provided for biasing the drum such that the openings are out of alignment. A manual control wheel is provided for rotating the drum so that the openings are in alignment, so that the key can be extracted from case.
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