Command Signaling Device Spring Contact Signal Generation
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Solution Overview
Problem
Existing command and signaling devices require multiple components for signal generation, monitoring, and return functions, leading to complexity and increased costs.
Innovation Solution
A command and signaling device with an actuating tappet operatively connected to a spring element mounted on a printed circuit board, featuring multiple contact pads that convert different compression positions into distinct signals, integrating monitoring, signal generation, and return functions in a single component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate components (microswitch, contact block, return element) are used for signal generation and monitoring, then the device achieves reliable signal generation, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the contact element, monitoring function, and return element into a single integrated component. The contact element with its biasing mechanism integrates the functions of signal generation and return, eliminating the need for separate microswitches, contact blocks, and return springs, thus reducing component count while maintaining reliability
Solution Approach 2:
The contact element serves multiple functions simultaneously: it generates the signal contact, provides monitoring capability through its inherent design, and acts as a return element through its biasing mechanism. This multi-functional design reduces the overall device complexity while maintaining all necessary functions
2Reliability
If a twin configuration is used to integrate a monitoring contact, then the monitoring function is achieved, but the device complexity and cost increase
Solution Approach 1:
The monitoring contact function is integrated into the same contact element that generates the signal, rather than requiring a separate twin configuration. The contact element's design inherently provides both signal generation and monitoring capabilities through its single structure
Solution Approach 2:
The contact element is designed to perform both signal generation and monitoring functions within a single component. The same contact that closes the circuit for signal generation also serves as the monitoring point, eliminating the need for duplicate components
3Ease of manufacture
If multiple functional elements are integrated into a single component, then the manufacturing cost decreases and device complexity reduces, but the manufacturing precision requirements increase
Solution Approach 1:
The contact pads are segmented into distinct outer and inner pads with specific geometries that correspond to different compression positions of the contact element. This segmentation allows each pad to serve a specific function (outer pad for one signal state, inner pad for another), simplifying the manufacturing tolerances compared to requiring precise alignment of multiple separate components
Solution Approach 2:
The contact element is pre-configured with specific geometric features (conical and cylindrical portions) that determine its compression positions and corresponding contact pad engagement. This preliminary design of the contact element's geometry establishes the switching points before assembly, reducing the need for post-assembly adjustment and simplifying manufacturing precision requirements
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 solution enhances signal reliability and reduces costs by combining multiple functional elements into a single component, allowing for flexible signal system customization and free definition of switching points.
Implementation Method 1
a spring element, the spring element being mounted on a printed circuit board... different compression positions of the spring element into different signals
Implementation Method 2
a plurality of contact pads are arranged between the printed circuit board and the spring element, such that the contact pads convert different compression positions of the spring element into different signals
Data Source
AI summary
A command and signaling device responsive to movement of an actuating tappet includes a spring element to which the tappet is operatively connected to compress the spring element in response to movement of the tappet. A plurality of contact pads are defined on the surface of a printed circuit board. The spring element has a conical portion that is mounted on the printed circuit board proximate the contact pads, and a cylindrical part to which the tappet is connected. As the tappet movably advances, it drives the spring element into increasingly compressed positions that are sensed by contact of the spring element conical portion with multiple ones of the contact pads so that the spring element provides monitoring contact in a first compression position, a command and messaging signal in a second compression position and return urgency for return movement of the tappet.