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US 7,351,924 B2Granted
Key switch with a device for key monitoring
AssigneeSiemens Aktiengesellschaft
InventorsJosef Scherl, Ralf Tomaschek, Rudolf Zimmermann
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Abstract
A key switch is disclosed, including a key channel for receiving a key and including a key-insertion-dependent switching mechanism. The switching mechanism exhibits a device for key monitoring. A key switch is specified which can be inexpensively manufactured and exhibits additional security-related options. For this purpose, the key switch exhibits a device for key monitoring which exhibits a quasi-rigid system arranged axially in the key channel, which are provided for key ejection and for operating a switching element.
Claims18
A key switch comprising:
- a key channel for receiving a key;
- and
- a key-insertion-dependent switching mechanism, the switching mechanism exhibiting a device for key monitoring in the key channel, the device exhibiting at least one axially moveable quasi-rigid system including transmission means for operating at least one actuator of the key switch, wherein
- in a first state of the quasi-rigid system, a relative position of the transmission means with respect to one another cannot be changed, and
- in a second state of the quasi-rigid system, the relative position of at least one transmission means with respect to another transmission means is changeable, the quasi-rigid system being in the first state or second state depending on the key position in the key channel,
- wherein the quasi-rigid system, in the first state, is provided for operating the actuator of the key switch.
3 more elements
Dependencies are inferred from the claim text.