Browse Prior Art Database

Method of a latch release for Mobile PDA accessories during a free fall using an accelerometer to detect the free fall.

IP.com Disclosure Number: IPCOM000198799D
Original Publication Date: 2010-Aug-17
Included in the Prior Art Database: 2010-Aug-17
Document File: 2 page(s) / 67K

Publishing Venue

Motorola

Related People

Gullo, Ken: INVENTOR

Abstract

The idea is to detect a free fall of a PDA and disengage a latch holding an accessory to the device before and during the impact. An accelerometer would be used to detect the freefall and would work with the micro controller connected to it to send a signal to disengage to latch.

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Method of a latch release for

Mobile

PDA accessories during a free fall using an accelerometer to detect the free fall.

By Kenneth E. Gullo

Motorola, Inc.

Networks Business

 

ABSTRACT

The idea is to detect a free fall of a PDA and disengage a latch holding an accessory to the device before and during the impact with the ground. An accelerometer would be used to detect the free fall and would work with the micro controller connected to it to send a signal to disengage to latch.  This will allow the accessory to safely separate from the terminal without breaking.

PROBLEM

Currently PDAs with attached accessories have a mechanical latch to attach accessories to the PDA.  When a user drops the PDA with the accessory attached the latch needs to release without breaking.  The latch also needs to be strong enough to keep the two connected during use.

Mechanically designing it for easy separation during impact and strong connectivity while in use can be challenging.

 

SOLUTION

A solution to this problem is utilizing an electomechanical latch that can be release electronically during a freefall.  An accelerometer connected to a microcontroller can detect a freefall event and trigger the latch to release prior to the PDA and accessory impacting the ground.  This will allow the accessory to fall apart from the PDA minimizing stress on the connection between the two devices and preventing damage.

OPERATION

The figure below shows the system.   The following describes how the system...