Integrated Stationary Contact Assembly for Reliable PCB Switch Wiring
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Solution Overview
Problem
Conventional switching devices have a large number of contact connections, which can lead to poor electrical contact and safety accidents due to environmental factors and mechanical stress.
Innovation Solution
The proposed switch unit and switching device feature a stationary contact assembly with integrally molded first and second stationary contacts and pins, which are soldered to a circuit board, reducing the number of contact connections and simplifying the connection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional mechanical connection with screw terminals is used, then adaptability to different wiring configurations is improved, but the quantity of contact connections increases and reliability deteriorates due to poor electrical contact
Solution Approach 1:
The patent merges the stationary contact and the terminal into a single integrated component. The stationary contact is directly formed as part of the terminal structure, eliminating separate connection elements. This integration reduces the number of contact interfaces while maintaining wiring flexibility through the terminal's inherent design capabilities.
Solution Approach 2:
The terminal is designed with multi-functional capabilities, serving both as the electrical connection interface and as the stationary contact element. The terminal structure incorporates contact surfaces, mounting features, and wire attachment capabilities in a single component, reducing the need for multiple specialized parts.
2Ease of manufacture
If multiple separate contact components are used, then ease of manufacture is improved, but device complexity increases and reliability deteriorates due to more connection points
Solution Approach 1:
The stationary contact and terminal are combined into a single molded component. The patent describes a terminal with an integrated contact portion that is formed as one piece, eliminating the need for separate assembly steps for mounting contacts to terminals. This reduces both the number of parts and assembly operations while maintaining manufacturing feasibility.
3Ease of operation
If conventional screw terminal connections are used, then ease of operation is improved for wiring flexibility, but safety deteriorates due to poor electrical contact and environmental impacts
Solution Approach 1:
By integrating the stationary contact directly into the terminal structure, the patent eliminates separate mechanical interfaces that are susceptible to environmental degradation. The unified structure reduces the number of potential failure points where corrosion, loosening, or poor contact could occur, while maintaining wiring flexibility through the terminal's design.
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 reduces the likelihood of poor electrical contact, enhances safety by minimizing manual contacts and contact connections, and improves connection efficiency and stability.
Implementation Method 1
a first pin connected to the first stationary contact. The first pin is soldered to a circuit board
Data Source
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AI summary
Embodiments of the present invention relate to the field of electrical switching technologies, and provide a switch unit and a switching device. The switch unit includes at least one stationary contact assembly. Each stationary contact assembly includes a first stationary contact, a second stationary contact, and a first pin connected to the first stationary contact. The first pin is welded to a circuit board. This can reduce a quantity of contact connections, simplify a connection manner, and improve safety during use.