Smoke Security Device Battery Interlock Against Unintended Emission
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Solution Overview
Problem
Existing visibility-impairing security devices face the risk of unintended emission of smoke or fog due to transient electrical states during power transitions, which can occur when batteries are not properly installed or removed.
Innovation Solution
The device requires batteries to be installed before the emission unit, with an interference member blocking the battery holder until the emission unit is in place, ensuring a stable electrical connection and preventing unintended emissions by allowing battery replacement only when the emission unit is present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the emission unit is allowed to be installed without batteries, then the device structure becomes more flexible and easier to assemble, but transient electrical states may trigger unintended emission of smoke or fog
Solution Approach 1:
The device requires batteries to be installed before the emission unit, establishing a predetermined installation sequence. This preliminary action ensures that the electrical connection is stable before the emission unit becomes operational, preventing transient states from triggering unintended emission while maintaining assembly flexibility
2Ease of operation
If batteries can be removed freely, then battery replacement is convenient, but unintended emission may occur during power transitions
Solution Approach 1:
The device requires the emission unit to be installed before batteries can be removed, establishing a predetermined removal sequence. This ensures that the electrical connection remains stable during battery replacement, preventing transient states from causing unintended emission while maintaining operational convenience
Solution Approach 2:
The device uses a dynamic blocking mechanism that adaptively controls battery holder movement based on emission unit presence. When the emission unit is installed, the blocking mechanism dynamically prevents battery removal; when removed, battery replacement becomes enabled. This dynamic control maintains reliability while preserving ease of operation
3Reliability
If a blocking mechanism is added to control installation sequence, then unintended emission is prevented, but device complexity increases
Solution Approach 1:
The device introduces an interference member as an intermediary element between the battery holder and emission unit. This mediator physically blocks or permits battery installation/removal based on emission unit presence, providing a simple mechanical solution to control the installation sequence and prevent unintended emission without complex electronic control systems
Data Source
Figure 1A~1B
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AI summary
A visibility-impairing security device is disclosed for producing a gathering of air¬ suspended light-obscuring matter to obscure vision. The device comprises an insertable battery holder for holding at least one battery and a body comprising: a battery -holder receiving portion for receiving therein the battery holder; an emission unit receiving portion for holding an emission unit for emitting the matter in response to a delivery of energy derived from the at least one battery; and an interference member held by the body and movable between (i) a blocking position that blocks receipt of the battery holder into the battery-holder receiving portion and (ii) a withdrawn position whereby the battery holder is insertable into the battery-holder receiving portion. When the emission unit is held in the emission unit receiving portion the interference member is in the blocking position.