Rear Emergency Button with Touch and Depression Detection
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Solution Overview
Problem
Existing mobile communication devices require multiple button presses or complex operations to initiate an emergency call, making them impractical in urgent situations, and lack the ability to record and transmit voice evidence of crimes, particularly in cases involving family or acquaintances.
Innovation Solution
A smart phone with an emergency button engraved on its rear surface, featuring a touch detection unit and depression detection unit that transmit emergency information and record voices in real-time to a guardian terminal and agency server upon single-button activation, minimizing user panic and enabling voice evidence capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple buttons or complex operations are used to initiate emergency call, then emergency call function can be activated, but operation complexity increases and response time is delayed
Solution Approach 1:
The emergency button is segmented into two distinct functional zones: a touch detection unit on the upper surface and a depression detection unit on the lower surface. This segmentation allows the single button to detect different operation types (touch vs. depression) and trigger appropriate responses, simplifying user interaction while maintaining reliable emergency call activation
Solution Approach 2:
The emergency button is designed with multi-functionality to serve both normal operation mode and emergency call mode. By integrating touch and depression detection capabilities in a single button component, it replaces the need for multiple separate buttons or complex operation sequences, achieving both ease of operation and reliable emergency activation
2Reliability
If multiple buttons are required for emergency call, then false activation can be prevented, but ease of operation in emergency situation deteriorates
Solution Approach 1:
Different regions of the emergency button have different functional qualities: the upper surface (touch detection unit) responds to light touch for normal operations, while the lower surface (depression detection unit) requires forceful depression for emergency calls. This local quality differentiation enables reliable false activation prevention while maintaining ease of operation during actual emergencies
Solution Approach 2:
The button detects changes in physical parameters (touch pressure threshold, depression depth) to distinguish between normal operation and emergency activation. By monitoring these parameter changes, the system prevents false activation while allowing rapid emergency response when the correct depression threshold is reached
3Ease of operation
If emergency button protrudes from rear surface, then ease of operation improves, but device aesthetics and compactness deteriorate
Solution Approach 1:
The emergency button is designed with engraved recesses on the rear surface that allow the touch and depression detection units to be positioned in different dimensional planes. This dimensional arrangement enables the button to remain flush with the rear surface for aesthetic purposes while maintaining adequate operational surface area and accessibility
Data Source
AI summary
A smart phone having an emergency call button includes an emergency button which is provided on a rear surface of the smart phone so as not to protrude from the rear surface and has a touch detection unit disposed on the rear surface of the smart phone to detect a touch signal according to manipulation of a user, and a decompression detection unit disposed on a lower portion of the touch detection unit to detect a decompression signal according to the manipulation of the user, and an emergency call transmission unit which transmits preset emergency rescue request information to a guardian terminal and an agency server.