Portable Siren with Dummy Switch for Evidence Collection
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Solution Overview
Problem
Existing portable sirens and emergency call devices often require manual actuation and lack effective mechanisms to deter attackers, making it difficult to secure evidence and identify perpetrators in criminal situations.
Innovation Solution
A portable siren with an external switch or dummy switch that emits a high sound pressure signal, designed to distract attackers and secure fingerprints and DNA evidence, featuring a housing with a tone generator, internal and external switching elements, and injury mechanisms to collect biological samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an external switch is provided on the portable siren, then the ease of operation is improved, but the reliability deteriorates because the switch can be easily operated by attackers to switch off the alarm
Solution Approach 1:
The patent applies preliminary action by providing an external switch dummy that appears to be a functional switch but actually performs no switching function. This dummy switch is positioned to attract the attacker's attention and prompt them to press it, while the real switching function is performed by an internal switch that is not accessible to the attacker. The dummy switch is prepared in advance to deceive the attacker into wasting time attempting to operate it.
Solution Approach 2:
The external switch dummy serves as an intermediary element between the attacker and the actual alarm system. It appears to be a control interface but is actually a decoy that redirects the attacker's actions away from the victim and toward the dummy switch. The dummy switch mediates the interaction by providing a false target for the attacker's deactivation attempts.
2Productivity
If the siren emits high sound pressure signal, then the effectiveness in drawing attention is improved, but the object-generated harmful factors worsen due to potential injury to the victim or bystanders
Solution Approach 1:
The patent applies local quality by directing the high sound pressure signal specifically toward the attacker rather than omnidirectionally. The loudspeaker is positioned and oriented to project the alarm sound primarily in the direction of the threat, maximizing the deterrent effect on the attacker while minimizing exposure to the victim and innocent bystanders. This localized sound projection maintains effectiveness against the threat while reducing harmful effects on others.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively deters attackers by emitting a high sound pressure signal, secures fingerprints and DNA evidence, and provides means to collect biological samples, enhancing the chances of perpetrator identification and conviction.
Implementation Method 1
a loudspeaker (8) which is designed to emit a tone signal, preferably at high sound pressure
Data Source
Figure 1A~1C
Figure 2A~2B
Figure 2C~2E
AI summary
Portable siren or emergency call device comprising a portable siren, comprising a loudspeaker (8) for emitting an audio signal, preferably at a high sound pressure, an inner and/or outer switching element (14) for switching off and preferably switching on and off the audio signal, and an outer switch and/or an outer dummy switch (4).