Vehicle Door Handle Micro-Switch Layout for Compact Reliable Opening
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Solution Overview
Problem
Current electronic car door handles with integrated single pole double throw (SPDT) switches face issues of excessive thickness, safety concerns due to stuck switches, and mechanical vibrations causing unintended door opening, necessitating a solution for compact and secure designs.
Innovation Solution
A vehicle door handle system utilizing a pair of adjacent micro-switches with one-finger activation, connected to a control unit for secure detection of door opening requests, incorporating an inverting unit and transistor network for reliable and compact operation, and additional pairs of switches for enhanced user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single pole double throw (SPDT) switch is used for door opening/closing control, then the switching function is achieved, but the handle thickness becomes too large for modern compact designs
Solution Approach 1:
The patent divides a single SPDT switch into two separate on-off switching units. Each unit is a simple single-pole single-throw switch, which is much thinner than an SPDT switch. The two units are arranged adjacent to each other and can be activated by a single finger press, achieving the same functional effect while reducing thickness.
Solution Approach 2:
The patent combines two simple on-off switching units into a single integrated assembly that functions as a replacement for one SPDT switch. By merging these two thin units adjacent to each other, the system achieves the dual-state switching capability of an SPDT switch while maintaining a compact thickness suitable for modern door handles.
2Reliability
If two switching units are used instead of one, then safety and error detection are improved, but device complexity increases
Solution Approach 1:
Each switching unit is designed with simple local structure (on-off type), and the two units are arranged adjacent to each other in a compact configuration. This local simplicity allows the system to achieve improved safety through redundancy without significantly increasing overall device complexity.
Data Source
AI summary
A vehicle door handle and a corresponding system is described. The vehicle door handle comprises a first pair of switches with a first on-off switching unit and a second on-off switching unit, wherein the switching units of the first pair of switches are arranged adjacent to one another on the car door handle, the first on-off switching unit is connectable to a first input of a control unit as to control switching between a high level and a low level at the first input, and the second on-off switching unit is connectable to a second input of the control unit as to control switching between a high level and a low level at the second input.