Potted PCB Switch Assembly for Moisture-Protected Lock Sensing
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Solution Overview
Problem
Existing lock device sensors are often bulky, complicated, and prone to errors, lacking sufficient protection against moisture and other environmental factors.
Innovation Solution
A switch with a deformable cap and potting compound enclosing a printed circuit board, providing climate protection and enabling compact, reliable detection of lock device states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If prior art sensors are used in lock devices, then position detection function is achieved, but the sensors are bulky and complicated
Solution Approach 1:
The patent replaces complex optical or electronic sensors with a simple mechanical switch mechanism. The switch uses a deformable cap with movable and stationary contacts that mechanically detect position through direct contact, eliminating the need for complicated sensor systems while maintaining reliable position detection functionality.
Solution Approach 2:
The invention extracts only the essential function of position detection from complex sensor systems and implements it through a simplified mechanical switch. By taking out the core detection requirement and removing unnecessary sensor components, the solution achieves reliable position monitoring with significantly reduced complexity.
2Reliability
If prior art sensors are used in lock devices, then position detection function is achieved, but they are not sufficiently protected against moisture and water
Solution Approach 1:
The patent employs a deformable cap that acts as a flexible protective shell enclosing the electrical contacts. This cap provides moisture and water protection while allowing mechanical deformation to activate the switch, combining environmental sealing with functional movement in a single protective structure.
Solution Approach 2:
The deformable cap serves as an intermediary element that transmits mechanical force from the actuator to the contacts while simultaneously providing environmental protection. This mediator component isolates the electrical contacts from moisture and water while enabling the position detection function through controlled deformation.
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 switch offers durable, compact design with reliable climate protection, allowing efficient monitoring of lock device states without compromising functionality.
Implementation Method 1
the cap being arranged to be deformed from a disconnected state where the movable contact is separated from the stationary contact to a connected state where the movable contact contacts the stationary contact
Implementation Method 2
a potting compound enclosing the PCB and the cap. The potting compound and the cap provide a full climate protection of the movable contact and the stationary contact, such as a protection against moisture and water
Data Source
AI summary
A switch comprising a printed circuit board assembly, PCBA, including a printed circuit board, PCB, and a stationary contact; a cap in contact with the PCB such that the cap and the PCB define a switch chamber for the stationary contact, the cap carrying a movable contact, the cap being arranged to be deformed from a disconnected state where the movable contact is separated from the stationary contact to a connected state where the movable contact contacts the stationary contact, and the cap being forced towards the disconnected state; an actuator movable relative to the stationary contact between an activated position where the actuator pushes the cap to the connected state, and a deactivated position allowing the cap to be forced to the disconnected state; and a potting compound enclosing the PCB and the cap. A lock device comprising a switch is also provided.