PCB Pressure Switch Assembly With Securing Layer Support
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Solution Overview
Problem
Existing pressure switch devices for electronic devices have complex and costly manufacturing processes due to intricate recess designs and require special molding tools, leading to high production costs.
Innovation Solution
A pressure switch device with a securing layer on the bearing plate that forms a user interface and partially closes the holder, allowing the actuating element to be fixed form-fittingly between the circuit board and the securing layer, enabling simple assembly and cost-effective production using a dome-shaped push button and elastomer material for the actuating element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex recess shape is used to secure the base and guide the plunger, then the securing and guiding functions are improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent divides the recess into two separate functional elements: a simple cylindrical recess for securing the base and a separate guide structure for the plunger. This segmentation allows each element to be manufactured independently with simpler processes, reducing overall manufacturing complexity while maintaining the securing and guiding functions.
Solution Approach 2:
The patent extracts the guiding function from the complex recess shape and implements it through a separate guide structure. This extraction allows the main recess to remain simple and easy to manufacture, while the guiding function is provided by the added guide element, thereby reducing manufacturing complexity without compromising functionality.
2Manufacturing precision
If special molds are used to manufacture the complex recess, then the manufacturing precision is improved, but the manufacturing cost increases
Solution Approach 1:
By segmenting the recess into simpler geometric shapes that can be manufactured with standard tools and processes, the patent eliminates the need for expensive special molds. The simplified geometry allows for precise manufacturing using conventional methods, thereby reducing costs while maintaining adequate precision.
Solution Approach 2:
The patent adopts design features that can be manufactured with inexpensive, readily available tools and materials rather than requiring costly specialized equipment. This approach prioritizes cost-effectiveness while achieving sufficient manufacturing precision for the application.
3Reliability
If multiple components (push button, plunger, complex recess) are used, then the switching function is improved, but the device complexity and assembly difficulty increase
Solution Approach 1:
The patent merges the base securing function and the plunger guiding function into an integrated structure where the guide structure is positioned within or integrated with the bearing plate. This merging reduces the number of separate components and simplifies assembly while maintaining the switching function.
Solution Approach 2:
The bearing plate is designed to perform multiple functions: it provides structural support, secures the base through its recess, guides the plunger through the integrated guide structure, and maintains proper alignment. This multi-functionality reduces the need for separate dedicated components, thereby simplifying the overall device.
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
The solution simplifies the production and assembly of pressure switch devices, reducing manufacturing costs while ensuring secure and precise operation of the contact element, allowing flexible adaptation to different circuit boards.
Implementation Method 1
an elastically deformable actuating element (20) is provided by means of which the contact element (18) can be moved from the open position to the contact position
Data Source
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AI summary
The invention relates to a pressure switch device (2) for an electronic device (E), having at least one contact region (6) provided on a printed circuit board (10); a contact element (18) movable between an open position and a contact position on the contact region (6); an elastically deformable actuation element (20), by means of which the contact element (18) is displaceable from an open position into the contact position; and a bearing plate (12), which is provided on the printed circuit board (10) and has at least one bearing recess (14), which together with the printed circuit board (10) forms a receptacle (28) for the contact element (18) and the actuation element (20), the printed circuit board (10) forming a receptacle base (30) and the bearing plate (12) forming a side boundary (32) of the receptacle (28). According to the invention, a securing layer (22) is provided on an upper face (38) of the bearing plate (12) facing away from the printed circuit board (10) and forms a user interface (24) and at least partially closes off the receptacle (28), the actuation element (20) having a fastening region (42), which is supported by the printed circuit board (10) and the securing layer (22).