Elastic Fixing Arms for Low-Force PCB Mounting
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Solution Overview
Problem
Traditional methods for fixing elements to substrates, such as printed circuit boards, are complex and costly due to the need for precise positioning and high insertion forces, limiting flexibility and increasing manufacturing complexity.
Innovation Solution
A method using asymmetrical fixing branches that deform elastically during insertion, allowing for simple and low-force attachment to a substrate, with optional reversible fixing and subsequent reinforcement for permanent bonding, enabling flexible and efficient component mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fixed positioning methods are used to attach components to substrates, then mechanical stability is ensured, but manufacturing complexity and cost increase due to stringent positioning requirements
Solution Approach 1:
The fixing arms transition from a rigid static structure to a dynamic elastic structure that can deform during insertion. The arms are designed with elastic properties allowing them to flex outward during insertion and then spring back to provide securing force, enabling adaptive positioning without stringent pre-positioning requirements
Solution Approach 2:
The invention changes the physical state of the fixing arms from rigid to elastic, allowing temporary deformation during the attachment process. The arms can be elastically deformed to a larger diameter during insertion and then return to their original diameter to secure the support, providing both ease of insertion and reliable fixation
2Strength
If high insertion force is applied to secure the support to the substrate, then attachment strength is improved, but the insertion process becomes more difficult and may damage components
Solution Approach 1:
The fixing arms utilize elastic deformation dynamics to reduce insertion force. During insertion, the arms flex outward dynamically to accommodate the insertion hole, then spring back to provide strong securing force without requiring high insertion force that could damage components
Solution Approach 2:
The elastic arms are pre-designed to absorb insertion forces through controlled deformation. The arms act as cushioning elements that temporarily deform to accommodate insertion variations and then recover, protecting both the support and substrate from damage while maintaining attachment strength
3Ease of manufacture
If the support position is fixed early in the manufacturing process, then subsequent assembly steps are simplified, but flexibility for adjustments is lost
Solution Approach 1:
The elastic fixing arms provide dynamic positioning capability that allows the support to be easily inserted and repositioned during manufacturing. Once the support is in the desired position, the arms spring back to secure it firmly, providing both flexibility during assembly and stability during subsequent manufacturing steps
4Ease of operation
If asymmetrical fixing arms are used to facilitate insertion, then insertion direction is optimized, but the structure becomes more complex
Solution Approach 1:
The fixing arms are designed with asymmetrical cross-sections featuring a convex side and a concave side. The concave side faces the insertion direction and provides a streamlined profile that facilitates smooth insertion, while the convex side provides structural strength. This asymmetrical design optimizes insertion ease without significantly increasing overall structural complexity
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 method reduces the complexity and cost of fixing components by allowing for easy, low-force insertion and subsequent reinforcement, ensuring stable and durable attachment, while maintaining flexibility in assembly processes.
Implementation Method 1
the fastening arms being configured to deform elastically when inserted into the at least one insertion hole provided in a substrate
Data Source
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Figure 8
AI summary
A method for attaching an element (100) to a substrate (50) comprising the following steps: a) a substrate and a support (10) are provided, the support having at least one fastening device. This fastening device has at least two fastening arms (24A, 24B), the ends of which are not in contact with each other, and which are configured to be inserted into one or more insertion holes (52) in the substrate and to allow the support to be attached to the substrate; b) with the element attached to the support, the support is attached to the substrate by inserting the fastening arms of the support into the insertion hole(s) in the substrate. A fastening support is provided for implementing the method.