Contactless Button PCB Layout for Simpler Signal Sensing Assembly
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Solution Overview
Problem
Conventional contactless buttons have complex assembly processes, leading to high costs and low yields.
Innovation Solution
A contactless button design that includes a shell, a circuit board, a signal-transmitting element, a signal-sensing element, and a signal-blocking element, where the signal-sensing element is directly connected to the circuit board, eliminating the need for additional wiring and simplifying the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional contactless button design with separate wiring for signal-transmitting element and signal-sensing element is used, then the button can detect touch signals, but the assembly process becomes complex and costly
Solution Approach 1:
The patent combines the signal-transmitting element and signal-sensing element into a single integrated structure mounted on the circuit board. The transmitting element and sensing element share the same mounting location and electrical connection path, eliminating the need for separate wiring routes and reducing assembly complexity while maintaining touch detection functionality.
Solution Approach 2:
The circuit board serves multiple functions: it provides structural support, electrical connections for the transmitting element, and electrical connections for the sensing element. The same circuit board trace that powers the transmitting element also carries the sensed signal back to the controller, reducing the need for additional dedicated wiring.
2Reliability
If additional wiring is used to connect signal-transmitting element and signal-sensing element separately, then signal transmission is reliable, but production cost increases and yield decreases
Solution Approach 1:
The patent merges the wiring paths of the signal-transmitting element and signal-sensing element into a single shared connection route on the circuit board. This reduces the total number of wiring operations required during assembly, minimizing defects and rework, thereby improving production yield while maintaining signal transmission reliability.
3Reliability
If separate wiring is provided for signal-transmitting element and signal-sensing element, then electrical connection is established, but manufacturing cost increases
Solution Approach 1:
The patent combines the electrical connection paths for the signal-transmitting element and signal-sensing element into shared traces on the circuit board. This reduces the total length of wiring required, decreases the number of soldering operations, and simplifies the manufacturing process, thereby lowering production costs while ensuring reliable electrical connections for both elements.
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 design reduces assembly complexity, lowers production costs, and increases yield by eliminating the need for additional wiring and simplifying the assembly process.
Implementation Method 1
The signal-transmitting element is an infrared signal-transmitting element, and the signal includes an infrared ray. The signal-sensing element can include an infrared-sensing element.
Implementation Method 2
The signal-sensing element is adapted to receive the signal reflected outside the shell.
Data Source
AI summary
A contactless button includes a shell, a circuit board, a signal-transmitting element, a signal-sensing element, and a signal-blocking element. The shell has an opening. The circuit board is connected to the shell and has a surface facing the opening. The signal-transmitting element is electrically connected to the circuit board and is fixed to the surface. The signal-transmitting element is located in the shell and is adapted to emit a signal to the opening. The signal-sensing element is electrically connected to the circuit board and is fixed to the surface. The signal-sensing element is adapted to receive the signal reflected outside the shell. The signal-blocking element is arranged between the signal-transmitting element and the signal-sensing element.