Noise Filter Terminal Layout for Compact Coil Connection
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Solution Overview
Problem
The miniaturization of noise filters is limited by the spacing between the terminal block and the coil due to the presence of the printed circuit board.
Innovation Solution
A noise filter design that separates large currents and signal currents by positioning the board connection part below the coil connection part, allowing for a compact design, with the board connection part supporting the coil connection part and defining specific current ranges and resistances to stabilize current flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a printed circuit board is provided between the terminal block and the coil, then electrical connection and component mounting are enabled, but the width between the terminal block and the coil cannot be reduced, limiting miniaturization
Solution Approach 1:
The patent extracts the printed circuit board from the conventional structure and replaces it with a terminal fitting that integrates terminal block and coil connection functions. The terminal fitting directly connects the terminal block to the coil through lead wires, eliminating the need for a separate printed circuit board and enabling miniaturization of the noise filter.
Solution Approach 2:
The patent merges the terminal block and coil connection functions into a single terminal fitting component. The terminal fitting integrates the terminal body, coil connection part with caulking function, and board connection part, combining multiple previously separate components into one unified structure that reduces overall device size.
2Reliability
If the coil connection part caulks the lead wire, then electrical connection is secured, but the terminal fitting may be deformed during caulking
Solution Approach 1:
The patent implements preliminary support structure where the board connection part supports the coil connection part from below before the caulking operation. This pre-positioned support prevents the terminal fitting from deforming during the lead wire caulking process while ensuring reliable electrical connection.
3Volume of moving object
If the coil connection part is brought close to the coil for miniaturization, then device size is reduced, but support during caulking becomes difficult
Solution Approach 1:
The patent solves the support problem by transitioning from horizontal support to vertical support. The board connection part positioned below the coil connection part provides upward support from the bottom dimension, enabling the coil connection part to be brought close to the coil while maintaining assemblability and preventing deformation during caulking.
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 configuration enables miniaturization of the noise filter while ensuring stable current separation and assemblability, preventing deformation of terminal fittings, and maintaining insulation distances, thus facilitating efficient current supply to electronic components.
Implementation Method 1
the coil connection part caulks the lead wire
Data Source
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AI summary
A noise filter that can be miniaturized is provided. A noise filter (100) includes a terminal fitting (1), a board (2), a coil (3) mounted on the board (2), and an electronic component (5) mounted on the board (2). The terminal fitting (1) includes a terminal body (11) electrically connected to an external device, a coil connection part (12) electrically connected to the coil (3) through a lead wire (4), and a board connection part (13) electrically connected to the board (2). The coil connection part (12) caulks the lead wire (4).