Multi-directional Switch with Variable Contact Resistance
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Solution Overview
Problem
Conventional multi-directional switches for operating electronic apparatuses, such as car audio and navigation systems, lack the ability to efficiently and easily perform diverse functions with high speed and user-friendly operation, particularly in adjusting the speed of selection movement based on tilt angle.
Innovation Solution
A multi-directional switch design featuring a pressure-sensitive body with varying contact resistance, controlled by a detection pin and operating body, which changes contact resistance in response to tilt angle, allowing for diverse function performance by adjusting the contact area and force applied to electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional multi-directional switches use fixed contact resistance, then the structure is simple, but the operational speed and user-friendliness are insufficient
Solution Approach 1:
The patent applies parameter changes by making the contact resistance variable rather than fixed. The operating body is designed to change the contact area between the pressure-sensitive body and electrode based on tilt angle, thereby dynamically adjusting contact resistance to enable speed control of selection movement.
Solution Approach 2:
The patent introduces a pressure-sensitive body as an intermediary element between the operating body and the electrode. This intermediary allows for controlled variation of contact resistance through changes in contact area, enabling sophisticated operation control without directly complexifying the main switch structure.
2Adaptability or versatility
If the contact area between pressure-sensitive body and electrode is fixed, then manufacturing is simple, but diverse functions cannot be achieved
Solution Approach 1:
The patent applies dynamics by making the contact area between the pressure-sensitive body and electrode variable. The operating body is designed to tilt and adjust the contact area based on tilt angle, enabling the switch to perform diverse functions such as controlling selection movement speed without complicating manufacturing.
3Ease of operation
If the operating body applies constant force, then the mechanism is simple, but high-speed operation and user control are limited
Solution Approach 1:
The patent applies parameter changes by enabling the operating body to vary the pushing force applied to the detection pin based on tilt angle. This allows users to control not only direction but also the magnitude of force, enabling fine-grained control of selection movement speed and enhancing ease of operation.
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
Enables electronic apparatuses to perform functions that reflect changes in contact resistance, providing a user-friendly and high-speed operation by adjusting the speed of selection movement based on the tilt angle, enhancing user control and functionality.
Implementation Method 1
The degree of a pushing force exerted by the operating body onto the detection pin changes the contact resistance between the pressure-sensitive body and the electrode
Data Source
AI summary
A multi-directional switch includes switches, a wiring board having an electrode, a pressure-sensitive body disposed over the electrode, a detection pin disposed on the upper surface of the pressure-sensitive body, and an operating body configured to push the detection pin and the switches by being tilted. The degree of a pushing force exerted by the operating body onto the detection pin changes the contact resistance between the pressure-sensitive body and the electrode. The multi-directional switch enables an electronic apparatus connected thereto to perform diverse functions by reflecting changes in the contact resistance.