Switch Module Welding Plate for Thermal Insulation During PCB Soldering
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Solution Overview
Problem
Conventional switch devices directly welded to circuit boards suffer from deformation and internal damage due to high temperatures during welding, leading to loosened linking mechanisms and poor electrical contact.
Innovation Solution
A switch device with a welding protective plate made of high-temperature resistant material located between the switch module and the circuit board, providing thermal insulation and protection, and a driving member to control the connection or disconnection of control terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If switch elements are directly welded to the circuit board, then wiring is simplified and space utilization is improved, but the switch elements deform and internal mechanisms are damaged due to high temperature during welding
Solution Approach 1:
The patent introduces a heat-resistant welding protective plate as an intermediary component between the switch elements and the circuit board. This protective plate withstands the high temperature of welding without deforming, thereby protecting the switch elements from thermal damage while still allowing the wiring simplification benefit of direct welding to be realized.
2Device complexity
If switch elements are directly welded to the circuit board, then assembly complexity is reduced, but the linking mechanism becomes loose and electrical contact deteriorates due to thermal deformation
Solution Approach 1:
The heat-resistant welding protective plate serves as a mediator that maintains structural stability during welding. It prevents the switch elements from deforming under thermal stress, thereby preserving the precision of the linking mechanism and ensuring good electrical contact while keeping the assembly process simple.
3Reliability
If a heat-resistant protective plate is added between the switch module and circuit board, then protection from welding heat is improved, but device complexity increases
Solution Approach 1:
The welding protective plate is designed as a simple, inexpensive component that serves its protective function during the welding process. Although it adds a component to the structure, its simplicity and low cost minimize the overall impact on device complexity while providing essential thermal protection.
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
Prevents internal damage to switch modules during welding, ensuring reliable electrical connections and adaptable structure for various applications.
Implementation Method 1
The welding protective plate is located between the switch module and the circuit board to serve as a thermal insulation and protection mechanism to protect the switch module from external deformation and internal damage due to the high temperature during the welding operation
Data Source
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AI summary
A switch device includes at least one switch module and at least one welding protective plate. The switch module includes an enclosure for receiving a plurality of control terminals and a driving member therein. The control terminals respectively have an end projected from an end or a rear side of the enclosure. The driving member is controllable to change an electrically connected or disconnected state between the control terminals. The welding protective plate is provided on the enclosure at the end from where the control terminals are projected. The projected control terminals further extend through the welding protective plate to be welded to a circuit board. The welding protective plate can withstand a high temperature and is located between the switch module and the circuit board to form a thermal insulation and protection mechanism, protecting the switch module from external deformation and inner damage by the high temperature during welding.