Touch Control Panel Isolation Structure for Stable Capacitive Sensing
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Solution Overview
Problem
Existing touch control panels using capacitive sensing technology with springs face safety risks due to the conductor nature of the springs, and previous isolation methods lack stability, leading to potential malfunctions and fitting issues.
Innovation Solution
An additional isolation member structure is introduced between the elastic conductors and the front cover plate, with positioning portions and elastic compression forces ensuring stable fitting and close contact without affecting touch sensitivity, using a support with through holes and hat-shaped isolation members that can expand and contract, and made of plastic to prevent scratching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an isolation structure is added between the spring and front cover plate to meet safety requirements, then safety is improved, but the device complexity increases
Solution Approach 1:
The isolation member is integrated with the support structure through positioning portions (through holes), merging the isolation function with the structural support function. This reduces device complexity by combining multiple functions into a single integrated component rather than adding separate isolation elements.
Solution Approach 2:
The isolation member acts as an intermediary component between the conductive spring and the front cover plate, providing electrical isolation while maintaining mechanical connection. This mediator approach solves the safety issue without requiring complex isolation structures.
2Reliability
If a plastic member is wrapped around or embedded in the spring to create an isolation structure, then safety is improved, but the fitting stability deteriorates
Solution Approach 1:
The isolation member is divided into distinct functional segments: the main isolation body and the positioning portions (through holes). This segmentation allows the positioning portions to provide stable mechanical attachment while the main body provides electrical isolation, resolving the conflict between safety and fitting stability.
Solution Approach 2:
The isolation member is nested within the support structure through the positioning portions (through holes), creating a stable hierarchical arrangement. The spring is in turn nested against the isolation member, forming a stable multi-layered structure that prevents malfunction and ensures fitting stability.
3Object-generated harmful factors
If the isolation members are made of plastic to prevent scratching the front cover plate, then object-generated harmful factors are reduced, but the device complexity increases
Solution Approach 1:
The isolation member is made of plastic specifically at the portions that contact the front cover plate (outer surfaces), while other portions may have different properties. This local quality approach prevents scratching where needed without requiring the entire structure to be complex or overly specified.
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 solution enhances the stability and safety of the touch control panel by maintaining close contact between isolation members and the front cover plate, ensuring reliable touch detection and improved user experience while meeting safety standards without compromising sensitivity or damaging the panel.
Implementation Method 1
a capacitive touch sensing technology may be used to operate and control home appliances. An implementation of the capacitive touch sensing technology is to use a spring as a capacitive trigger medium. When a user touches a corresponding button or icon on a touch control panel, the spring can detect the touch operation signal
Implementation Method 2
The elastic conductors at least partially extend into the positioning portions and abut against inner surfaces of the isolation members, so that outer surfaces of the isolation members abut against the front cover plate
Data Source
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AI summary
The present invention relates to a touch control panel and a home appliance thereof are provided. The touch control panel includes a front cover plate and a touch control module. A support is provided with positioning portions corresponding to touch key regions. Isolation members are arranged on the positioning portions. Elastic conductors at least partially extend into the positioning portions and abut against inner surfaces of the isolation members, so that outer surfaces of the isolation members abut against the front cover plate to limit the isolation members to the positioning portions. In the foregoing solution, an additional isolation member structure is added between the elastic conductors and the front cover plate, and a stroke and a position thereof are limited by using the support, so that the fitted structure is more stable. In addition, it is ensured that the isolation members can be maintained in close contact with the elastic conductors and the front cover plate, without affecting the touch sensitivity.