Elastic Arm Positioning Assembly for Screwless Circuit Board Mounting
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Solution Overview
Problem
Conventional methods for fixing circuit boards, such as using bolts or thumb screws, are complex, time-consuming, and hinder the miniaturization of electronic devices, increasing manufacturing costs and operational inconvenience.
Innovation Solution
A positioning assembly comprising a fixed member with elastic arms, a movable member with guide chamfers, and a latching member that allows the circuit board to be easily mounted and dismounted by sliding along a guide direction, eliminating the need for screws by using elastic deformation to secure the board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bolts are used to fix the circuit board, then the fixation is reliable, but the mounting and dismounting process is complicated and time-consuming
Solution Approach 1:
The fixation system is divided into separate functional components: positioning posts for alignment, elastic arms for engagement, and latching members for locking. This segmentation allows each component to perform its specific function efficiently, enabling reliable fixation while simplifying the overall mounting and dismounting process through modular assembly.
Solution Approach 2:
The elastic arms provide dynamic engagement that adapts to the latching members during assembly. The elastic deformation allows the arms to flex during insertion and then snap into place, providing automatic locking without requiring manual tightening operations, thus simplifying user operations while maintaining reliability.
2Device complexity
If thumb screws are used to fix the circuit board, then the fixation is simplified, but the mounting and dismounting process is still complicated and time-consuming
Solution Approach 1:
The elastic arms automatically engage with the latching members through elastic deformation and snapping action during the insertion process. This self-service mechanism eliminates the need for manual screwing operations, allowing users to simply push the circuit board into place while the elastic arms automatically perform the locking function, dramatically increasing mounting speed.
3Reliability
If multiple conductive bosses are used to fix the circuit board, then the fixation is stable, but the area occupied on the mainboard increases
Solution Approach 1:
The positioning posts and elastic arms are integrated into a unified fixation structure that combines alignment and locking functions in a single compact assembly. This merging eliminates the need for separate conductive bosses and multiple fastening points, reducing the area occupied on the mainboard while maintaining fixation stability through the coordinated action of the integrated components.
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
Enables quick and stable mounting of the circuit board without screws, reducing operational complexity and manpower costs while allowing for easy assembly and disassembly.
Implementation Method 1
the latching member pushes the claw of the two elastic arms to deform, and moves to a top end of the claw. The top end of the claw of the two elastic arms leans against the latching member by returning of the deformation of the two elastic arms
Data Source
AI summary
A positioning assembly is used for positioning a circuit board on a case. The circuit board shifts relative to a case along a integrate direction or a release direction. The positioning assembly includes a fixed member, a movable member, and a latching member. The latching member is disposed on a side surface of the circuit board, and the fixed member is disposed to the case, for the latching member to pass through in a single direction along a integrate direction, such that the latching member is stopped at one end of the fixed member, thereby positioning the circuit board case. The movable member makes the fixed member spread and deform, such that the latching member passes through the fixed member in an opposite direction along a release direction, so that the circuit board may fixed on or detached from the case.