| 摘要 |
The invention relates to key switches (15) for drive devices having key recognition means (30) for recognizing a key (13) having key bit (13.1) and having a key receptacle for inserting the key bit (13.1). The key recognition means (30) operate without contact and have corresponding scanning means (32) for scanning at least part of the key bit (13.1). The scanning means (32) deliver actual values of a key (13). Storage means (31) are provided in order to store comparison values of a key (13) in an initialization phase. An electronic comparator (33) is provided, which compares actual values to comparison values and causes a release if the actual values and comparison values agree.
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