PCB-Integrated Rotary Wheel Input for Thin Navigation Controls
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Solution Overview
Problem
Existing input devices for electronic apparatuses, such as remote-controls, face challenges in achieving a thin form factor while maintaining effective scrolling and navigation functionality, as they typically require stacked components that increase thickness.
Innovation Solution
The input device integrates a rotary wheel module into the printed circuit board, utilizing a mechanical lever switch and metal domes to generate electrical signals, allowing for a compact design with a thickness of less than 5 mm, and includes a button for confirmation, all while minimizing power consumption and using standard components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotary wheel module is mounted on a printed circuit board with stacked components, then the input device can be realized with standard components and reliable operation, but the thickness increases beyond 5 mm
Solution Approach 1:
The patent merges the rotary wheel module mounting with the printed circuit board by integrating the wheel directly into a recess of the PCB, eliminating the need for separate mounting plates or stacked components. The signal generator and other electronic components are mounted on the same PCB plane, achieving a unified structure that reduces overall thickness while maintaining reliable electrical connections and mechanical stability.
2Length of stationary object
If the thickness is reduced to less than 5 mm, then the input device achieves a thin form factor suitable for portable devices, but the integration of rotary wheel module and signal generator becomes more difficult
Solution Approach 1:
The patent segments the input device into functional zones on the printed circuit board: the rotary wheel module occupies a recess area, the signal generator is positioned adjacent to it, and other electronic components are distributed on the remaining PCB surface. This segmentation allows each component to be optimized for its function while maintaining a compact overall layout that achieves thinness without excessive integration complexity.
3Ease of manufacture
If standard components are used for cost-effective production, then the manufacturing cost is reduced, but achieving the required thinness and functionality becomes more challenging
Solution Approach 1:
The printed circuit board serves multiple functions simultaneously: it acts as the structural base for mounting the rotary wheel module, provides the electrical circuitry for signal generation and processing, and functions as the overall housing structure that defines the thin profile. This multi-functionality eliminates the need for separate specialized components, enabling cost-effective production using standard PCB manufacturing processes while achieving the required thinness.
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
This design enables extremely thin input devices with reduced power consumption and cost-effective production, ensuring reliable operation and navigation controls in electronic apparatuses like remote-controls and portable computers.
Implementation Method 1
The use of a mechanical lever switch has the advantage that it is not necessary to continuously provide power to the signal generator for enabling it to generate signals.
Implementation Method 2
The input device may comprise further input elements, particularly a button that is mounted on an undercarriage
Data Source
AI summary
An input device for an electronic apparatus including a printed circuit board with an opening in which a rotary wheel module is mounted. The construction enables the input device to be thinner.