Magnet Actuator Force Equilibrium Design
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Solution Overview
Problem
Existing magnet actuators in electronic devices face challenges due to dimensional tolerance variations and force imbalances, leading to defects and increased manufacturing and repair costs, as the force equilibrium state is only achieved after assembly, making it difficult to predict and prevent defects during the assembly process.
Innovation Solution
A magnet actuator design featuring a coil, a magnet, and two housings, where the magnet and housing are in a force equilibrium state, with a spacer maintaining this balance and allowing for adjustable air gaps to ensure stable operation and efficient assembly, reducing the impact of dimensional variations and force imbalances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnets are arranged in force equilibrium after assembly, then the magnet actuator can generate sound waves, but defects caused by dimensional tolerance variations and force imbalances can only be detected after assembly, increasing repair time and costs
Solution Approach 1:
The patent applies preliminary action by pre-assembling the magnet and coil in a sub-assembly unit before integration into the main device. This allows the force equilibrium state to be established and verified in advance, enabling defect detection before final assembly. The magnet is positioned at a predetermined distance from the coil in this preliminary sub-assembly, ensuring proper force balance is achieved before the components are integrated into the complete device.
2Stability of the object's composition
If resilient support elements are used to counteract magnetic forces, then magnets can be interconnected, but the force equilibrium state cannot be verified until after complete assembly, making defects costly to repair
Solution Approach 1:
The patent applies segmentation by dividing the magnet actuator into separate modular components - specifically the magnet assembly and coil assembly - that can be pre-assembled and tested independently. The magnet is positioned at a predetermined distance from the coil in a modular sub-assembly, allowing force equilibrium verification before final integration. This modular approach enables easier repair and replacement of individual components without disassembling the entire device.
3Manufacturing precision
If dimensional tolerance variations occur in structure elements, then assembly becomes more difficult, but these variations only become apparent after the force equilibrium state is reached
Solution Approach 1:
The patent applies preliminary action by establishing the predetermined distance between the magnet and coil in a preliminary sub-assembly stage. This pre-positioning allows dimensional tolerance variations to be detected and corrected before final assembly, rather than discovering defects only after complete assembly. The magnet is held at the correct position relative to the coil in advance, enabling verification of dimensional accuracy.
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 design allows for balanced force equilibrium from the start, reducing defective electronic devices and associated costs by maintaining stable operation and efficient assembly, while also providing a space-efficient and robust magnet arrangement.
Implementation Method 1
a magnetic field, generated by the magnet and the first housing causing an attractive force between the magnet and the first housing
Implementation Method 2
the magnet and the first housing comprising a magnetic material, a magnetic field, generated by the magnet and the first housing causing an attractive force between the magnet and the first housing
Implementation Method 3
manipulating electrical current in the coil causes a change in the attractive force, thereby causing a displacement between the magnet and the first housing
Data Source
Figure 1
Figure 2a~2c
Figure 3~6
AI summary
A magnet actuator (1) for use in an electronic device (2) comprising a coil (3), a magnet (4), a first housing (5), and a second housing (6), the coil (3) being at least partially located within, and fixed to, the first housing (5), the magnet (4) being at least partially located within, and fixed to, the second housing (6). The first housing (5) comprises a magnetic material, and a magnetic field, generated by the magnet (4) and the first housing (5) causes an attractive force (F) between the magnet (4) and the first housing (5), the magnet (4) and the first housing (5) being in a force equilibrium state, wherein an air gap (7) is provided between the magnet (4) and the coil (3). Manipulating electrical current in the coil (3) causes a change in the attractive force (F), thereby causing a displacement between the magnet (4) and the first housing (5), allowing vibrations to be generated within the electronic device (2).