Single-Piece Yoke Actuator Assembly for Simpler Magnet Mounting
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Solution Overview
Problem
Existing actuators with a magnetic drive mechanism require multiple components and complex assembly processes due to a yoke structure composed of two members, increasing the number of components and assembly complexity.
Innovation Solution
An actuator design featuring a yoke structured as a single member with three bent parts and one fixed part, allowing for simplified assembly and reduced component count, where the yoke surrounds the coil with three bent portions and one fixed part, and the magnets are arranged to face each other with the coil interposed, enhancing magnetic drive mechanism efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the yoke is structured of two members (first yoke member and second yoke member), then it is easy to locate magnets on both sides of the coil and surround the coil with the yoke, but the number of components increases and assembly complexity increases due to multiple fixing positions
Solution Approach 1:
The patent merges the first yoke member and second yoke member into a single integrated yoke structure. This single yoke includes a body portion and two arm portions that extend in opposite directions, eliminating the need for separate components and reducing assembly complexity while maintaining the ability to locate magnets on both sides of the coil.
Solution Approach 2:
The single yoke is segmented into functional portions: a body portion and multiple arm portions extending in different directions. This segmentation allows the yoke to surround the coil and position magnets at multiple locations without requiring multiple separate yoke members, thus simplifying the overall structure.
2Ease of manufacture
If the yoke is structured of two members with fixing parts at two positions, then the coil can be surrounded by the yoke, but the assembly process requires welding or caulking at multiple positions increasing assembly time and complexity
Solution Approach 1:
By combining multiple yoke members into a single yoke structure with a body and multiple arms, the patent reduces the number of welding or caulking positions from two or more to a single integrated structure, significantly reducing assembly time and complexity while still surrounding the coil effectively.
Solution Approach 2:
The yoke is designed as a pre-formed single piece with arm portions already positioned to surround the coil. This preliminary configuration eliminates the need for multiple assembly steps and fastening operations at different positions, streamlining the assembly process.
3Ease of manufacture
If the yoke is structured of two members, then magnets can be fixed on both sides of the coil, but the number of components increases
Solution Approach 1:
The patent combines multiple yoke members into a single yoke structure that includes a body portion and multiple arm portions. This single component can fix magnets on both sides of the coil, reducing the total number of components while maintaining the same magnet fixation capability.
Solution Approach 2:
The single yoke structure serves multiple functions: it provides structural support, positions magnets on both sides of the coil, and surrounds the coil all with one component. This multi-functionality eliminates the need for separate yoke members, reducing component quantity.
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
The actuator achieves reduced component count and simplified assembly, with the yoke efficiently surrounding the coil and the magnetic drive mechanism providing increased thrust for relative movement of the support and movable bodies.
Implementation Method 1
a magnetic drive mechanism having a coil and a magnet
Implementation Method 2
The magnetic drive mechanism relatively moves the movable body and the support body
Implementation Method 3
the yoke is structured of one member... the yoke surrounds the coil holding part... magnetic flux from the magnets flow so as to surround the coil
Data Source
AI summary
An actuator includes a support body having a coil holder, a movable body having one side magnet facing a coil on one side, the other side magnet facing the coil on the other side, and a yoke to which the one side magnet and the other side magnet are fixed, and a connection body which relatively movably connects the support body and the movable body. The yoke is formed of one yoke member which is formed with a first yoke portion, a second yoke portion fixed with the one side magnet, a third yoke portion, a fourth yoke portion fixed with the other side magnet by bending the one yoke member so as to surround the coil. The yoke is formed of one yoke member and thus, an end portion of the fourth yoke portion and an end portion of the first yoke portion are fixed to each other.