Bent Plate Circuit Board Fixing Case for Compact Power Supply
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Solution Overview
Problem
The miniaturization of power supply products is hindered by the use of screws for fixing circuit boards, which require creepage distance to prevent short circuits, increasing product size and assembly complexity.
Innovation Solution
A case with bent plates is used to fix the circuit board, reducing the need for screws and allowing for a more compact design by forming a fixing region between the bent plates, thereby saving circuit wiring space and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws are used to fix the circuit board, then the circuit board is securely fixed to the case, but the creepage distance required between screws and circuit components increases the product size and reduces circuit wiring space
Solution Approach 1:
The patent removes screws from the circuit board structure entirely, extracting the harmful element that requires creepage distance. The circuit board is fixed to the case using direct mechanical attachment of the board edges to the case inner wall, eliminating the need for separate fastening components and their associated insulation requirements.
Solution Approach 2:
The fixing function is merged directly into the case structure itself. The case inner wall is designed with integrated fixing features that directly attach to the circuit board, combining the support and fixation functions into a single integrated structure, thereby eliminating the need for separate screws and their creepage distances.
2Reliability
If screws are used to fix the circuit board, then the circuit board is securely fixed, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The patent removes screws and related fastening mechanisms from the assembly process. The circuit board is directly attached to the case structure through integrated fixing features, eliminating the need for separate fastening components and simplifying the assembly process to a single attachment operation.
Solution Approach 2:
The case structure provides its own fixing functionality through integrated features on the inner wall. The case serves both as the housing and as the mounting structure for the circuit board, eliminating the need for external fastening components and reducing assembly complexity.
3Reliability
If screws are used to fix the circuit board, then the circuit board is securely fixed, but the number of screws and creepage distances increases production cost
Solution Approach 1:
The patent removes screws and their associated creepage distance requirements from the design. The circuit board is fixed using direct mechanical attachment to the case structure, eliminating the need for multiple fastening components and reducing material costs and manufacturing complexity.
Solution Approach 2:
The fixing function is merged into the case structure itself, eliminating the need for separate fastening components. This integration reduces the total number of parts, lowers material costs, and simplifies manufacturing processes while maintaining secure fixation.
Data Source
AI summary
The invention provides a case for fixing a circuit board, including a plate body and an edge-bent component. The edge-bent component includes a first bent plate and a second bent plate respectively formed by extending and bending a side plate of the plate body inward. A fixing region that fits a thickness of the circuit board and fixes the circuit board in a first direction is formed between the first bent plate and the second bent plate. According to the invention, the circuit board is fixed by the bent plates formed by bending the case inward. The invention further provides a power supply, including the case for fixing the circuit board, the circuit board, and a circuit component. The circuit board is mounted in the fixing region to restrict movement of the circuit board in the first direction.