Switch Device Pin Preload Substrate Fixation
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Solution Overview
Problem
Existing switch devices with push-button switches face issues where the substrate may not be securely fixed, leading to potential failure in switching operations due to movement or deflection, increasing complexity and cost.
Innovation Solution
A switch device design that includes a substrate with a push-button switch mounted on it, housed within an upper and lower housing, where a pin member is used to preload and position the substrate, preventing deflection and ensuring secure operation by using a slider and pressing member to activate the switch without substrate movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the substrate is not securely fixed in conventional switch devices, then the device structure remains simple, but the push-button switch may fail to turn on properly due to substrate movement or deflection
Solution Approach 1:
The pin member is inserted into the substrate before the upper housing is assembled, pre-positioning and pre-fixing the substrate in place. This preliminary fixation action ensures the substrate is securely held before final assembly, preventing movement or deflection during switch operation without requiring complex fixation structures.
Solution Approach 2:
The pin member acts as an intermediary component between the substrate and the housing structure. It transfers and distributes the clamping force from the upper and lower housings to the substrate, providing secure fixation while maintaining structural simplicity. The pin member mediates the mechanical interaction to ensure reliable switch operation.
2Stability of the object's composition
If conventional switch devices use complex fixation structures to prevent substrate movement, then substrate stability improves, but device cost and assembly complexity increase
Solution Approach 1:
The substrate is pre-fixed to the lower housing using the pin member before upper housing assembly. This preliminary action simplifies the overall assembly process by eliminating the need for complex post-assembly fixation structures, reducing manufacturing steps, and lowering production costs while ensuring substrate stability.
Solution Approach 2:
The fixation function is extracted as a separate, simple pin member component rather than being integrated into complex housing structures. This extraction allows the pin member to be independently manufactured and assembled, simplifying the overall device structure and reducing manufacturing complexity while maintaining substrate stability.
3Reliability
If the substrate is securely fixed using the pin member preload mechanism, then switch operation reliability improves, but the device structure becomes more complex
Solution Approach 1:
The pin member is pre-assembled with the lower housing and used to preload the substrate before final assembly with the upper housing. This preliminary preload action ensures the substrate is securely positioned and prevents deflection during switch operation, achieving high reliability without requiring complex active preload mechanisms.
Data Source
AI summary
A switch device includes a substrate having one surface and another surface; a switch disposed on the one surface of the substrate and configured to be pressed; a first housing; a second housing; and a pin member. An internal space is formed by the first housing and the second housing, and the substrate is disposed in the internal space. The first housing has an opening through which at least a part of the pin member is inserted into the internal space. The second housing includes a support portion that supports the another surface of the substrate. When the pin member is inserted into the internal space through the opening, the pin member presses the support portion against the another surface of the substrate so as to cause the support portion to support the another surface of the substrate.