Power Conversion Apparatus Signal Terminal Vibration Resistance
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Solution Overview
Problem
Existing power conversion apparatuses face challenges in increasing vibration resistance and reducing size, with external vibrations shortening connector life and requiring complex alignment procedures for signal terminals during production.
Innovation Solution
The power conversion apparatus incorporates signal terminals projecting from the electronic component, inserted into through holes on the control board, with a communication space formed adjacent to the through holes, allowing for improved rigidity and alignment using a positioning jig, enabling enhanced vibration resistance and reduced size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal terminals are inserted into through holes of control board to improve vibration resistance, then vibration resistance is improved, but device complexity increases due to alignment requirements
Solution Approach 1:
The patent applies preliminary action by pre-forming through holes in the control board at precise positions before assembly. These pre-positioned through holes serve as guides that automatically align with the signal terminals during insertion, eliminating the need for complex alignment procedures while maintaining high vibration resistance through rigid mechanical connection.
2Volume of moving object
If end of signal terminal is located inside case to reduce size, then size is decreased, but ease of manufacture worsens due to inability to insert positioning jig
Solution Approach 1:
The patent resolves this contradiction by changing the insertion dimension. Instead of inserting the positioning jig horizontally from the side (which would be blocked by the case wall), the jig is inserted vertically from the top surface of the control board through the pre-formed through holes. This dimensional change allows the signal terminals to be positioned and inserted while keeping the apparatus compact with terminals contained inside the case.
3Ease of manufacture
If wires are used to connect electronic component to control board, then ease of manufacture is improved, but reliability deteriorates due to vibration-induced stress on connectors
Solution Approach 1:
The patent applies the extraction principle by removing the vulnerable wire and connector elements from the connection system. Instead of using flexible wires that require connectors and are susceptible to vibration-induced stress, the invention directly connects the signal terminals of the electronic component to the control board through rigid through-hole mounting, eliminating the weak points in the connection chain while simplifying the assembly process.
Data Source
AI summary
An electronic component includes a main body and signal terminals projecting in a projection direction of a module control terminal, the signal terminals being arranged in an arrangement direction. Through-holes are formed in a control board, and the signal terminals are inserted into the through-holes. In a case, an opening that opens in the projection direction is formed, and ends of the signal terminals are positioned in the projection direction. At a position adjacent to a through-hole group including the through-holes in the arrangement direction, a communication space is formed which makes a first space, which is positioned at a side of electronic component in the projection direction, communicate with a second space opposite to the first space. When a length of the through-hole group is a, and a distance between the through-hole group and the communication space is b, a length of the communication space is longer than a+b.