Electromagnetic Relay Seat Structure for Stable PCB Mounting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Surface mount-type electromagnetic relays with asymmetric terminal arrangements often experience poor balance when mounted on circuit boards, leading to instability and difficulties in reflow soldering.
Innovation Solution
The electromagnetic relay design includes a separate seat below the base, with bent contact and coil terminals that extend through holes in the base and seat, providing stability and preventing tilting on the circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If terminals are arranged asymmetrically on the bottom surface of the base, then the electromagnetic relay can be compactly designed, but the balance when placed on the circuit board becomes poor
Solution Approach 1:
The electromagnetic relay is divided into two separate parts: a base and a seat. The seat is disposed below the base and has a bottom surface that contacts the circuit board. This segmentation allows the terminal arrangement in the base to be asymmetric for compact design, while the seat provides a separate stable contact surface on the circuit board, resolving the contradiction between compact asymmetric design and mounting stability.
2Adaptability or versatility
If terminals are arranged asymmetrically, then device integration is improved, but the electromagnetic relay cannot maintain its posture when placed on the circuit board
Solution Approach 1:
The seat acts as an intermediary between the base and the circuit board. It has bent portions that extend into grooves on the circuit board, providing stable mechanical engagement. This intermediary structure allows the base to have asymmetric terminal arrangements for better device integration, while the seat maintains the required posture and stability during mounting.
3Ease of operation
If the electromagnetic relay is placed unstably, then mounting flexibility is increased, but the accuracy of mounting on the circuit board is reduced
Solution Approach 1:
The seat is pre-formed with bent portions that are designed to fit into specific grooves on the circuit board. This preliminary action ensures that when the electromagnetic relay is placed on the circuit board, the bent portions automatically engage with the grooves, providing stable positioning and high mounting accuracy. The pre-designed geometric fit eliminates the need for complex alignment procedures during mounting.
Data Source
AI summary
An electromagnetic relay includes a base, a seat, a first contact terminal, and a second contact terminal. The seat is a separate body from the base and is disposed below the base. The seat includes a first hole and a second hole. The first hole and the second hole each extend in the vertical direction. The first contact terminal extends downwardly from the base through the first hole. The first contact terminal includes a first bent portion bent along the bottom surface of the seat. The second contact terminal extends downwardly from the base through the second hole. The second contact terminal includes a second bent portion bent along the bottom surface of the seat.