Motor Connection PCB With Ferrites for Automated Rearview Assembly
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Solution Overview
Problem
The connection of motors to circuit boards in rearview assemblies is challenging due to bulky ferrite beads on wires, which complicates automation and proper placement during mass production, leading to difficulties in securing motors effectively.
Innovation Solution
A motor connection printed circuit board with slots for motor terminals, ferrites secured to the board, and capacitors to suppress noise, allowing for easier and more accurate motor attachment to the motherboard, enabling automation and reducing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If ferrite beads are added to wires to reduce motor noise, then electromagnetic interference is reduced, but the wires become bulky and difficult to maneuver into proper placement
Solution Approach 1:
The ferrite beads are extracted from the wire assembly and integrated directly into the circuit board structure. The circuit board includes recesses that receive the ferrite beads, separating the noise reduction function from the wire harness and eliminating the bulkiness issue while maintaining electromagnetic interference reduction.
Solution Approach 2:
The circuit board acts as an intermediary structure that houses both the electrical connections and the ferrite beads. By incorporating ferrite bead recesses into the circuit board, the design provides a mediator structure that organizes and secures the ferrite beads in fixed positions, making assembly easier while maintaining noise reduction functionality.
2Stability of the object's composition
If ferrite beads are secured to wires to prevent movement, then component stability is improved, but automation of the attachment process becomes difficult
Solution Approach 1:
The circuit board is pre-configured with ferrite bead recesses during manufacturing. These recesses are formed in advance to precisely accommodate ferrite beads of specific dimensions, allowing automated placement machines to simply drop the ferrite beads into the pre-prepared recesses without requiring complex securing operations.
Solution Approach 2:
The circuit board structure is segmented to include dedicated recesses for ferrite beads, separating the ferrite bead housing function from the wire connection area. This segmentation allows independent automated placement of ferrite beads into their designated recesses, simplifying the automation process while ensuring stable positioning.
3Adaptability or versatility
If motors are connected to circuit boards using traditional wire methods, then flexibility in motor placement is maintained, but assembly precision and automation capability are reduced
Solution Approach 1:
The circuit board serves multiple functions: it provides electrical connections through trace routing, houses ferrite beads for noise reduction, and incorporates motor mounting features. By integrating these functions into a single multi-functional component, the design achieves both precision (through fixed board geometry) and flexibility (through trace routing options).
Solution Approach 2:
The invention merges the wire harness function, ferrite bead housing, and motor mounting function into a single integrated circuit board structure. This consolidation eliminates the need for separate wire manipulation steps, enables automated assembly through precise board geometry, and maintains placement flexibility through flexible trace routing designs.
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
Facilitates efficient and automated attachment of motors to circuit boards, reducing noise interference and improving assembly precision, allowing for seamless operation in both mirror and display modes.
Implementation Method 1
at least one ferrite secured to the motor connection printed circuit board
Implementation Method 2
at least one capacitor secured to the motor connection printed circuit board
Data Source
AI summary
A system for securing a motor to a circuit board of a rearview assembly may comprise a display element having an orientation; a motor having at least two motor terminals; a motherboard having a connection header; and a motor connection printed circuit board defining at least two slots and having a body portion and an end portion. Traces may extend from the at least two slots to the end portion of the motor connection printed circuit board. Each of the at least two motor terminals may be inserted into one of the at least two slots defined by the motor connection printed circuit board; and a portion of each of the at least two motor terminals may extend through the slot in which it has been inserted.