| 摘要 |
An electronic device fastener (EDF) to protect a portable device that is placed in a holder which may be a case, belt clip, holster, cradle, or the like worn or carried by the user that uses a release sensor, proximity sensor, shock sensor, and clip sensor to protect a portable device such as a cell phone, portable media player, personal digital assistant (PDA), two-way radio, GPS device, headset, or earpiece from loss and misplacement. The system can provide up to five modes of protection against loss and misplacement of a portable device. In the first mode, the EDF uses the proximity sensor to time how long the portable device has been removed from the EDF In the second mode, the EDF monitors the proximity sensor and provides an alarm if the portable device is dislodged from the holder without the release sensor being pressed.
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