| 摘要 |
An apparatus, system, and method are disclosed for retracting a drill bit relative to a drill. In one embodiment, the apparatus includes a driving device within the drill, a drill bit coupleable to the driving device, a first engaging element coupled to the drill bit, a sensor in communication with the driving device, and a second engaging element coupled to the drill. The drill bit is rotatably drivable by the driving device. The sensor detects a change in a speed of the drill bit. The second engaging element engages with the first engaging element in response to the sensor detecting a change in the speed of the drill bit. The drill bit retracts relative to the drill in response to engagement between the second engaging element and the first engaging element.
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