Actuator with Integrated Magnetic Drive and Stopper Mechanisms
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Solution Overview
Problem
Existing actuators with magnetic drive circuits require a large planar area due to the configuration of the stopper mechanism outside the movable body, which limits their compactness.
Innovation Solution
The actuator design includes a support and a movable body with magnetic drive circuits where the stopper mechanisms are integrated between the coil holders and magnets, allowing for a reduced planar area by utilizing the space on both sides of the magnets for the stopper configurations, enabling the stopper mechanisms to overlap with the magnetic drive circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the stopper mechanism is configured by the coil holder and magnet holder on the outside of the movable body, then the movable range can be regulated, but the planar area of the actuator becomes large
Solution Approach 1:
The stopper mechanism is merged with the magnetic drive circuit components. The coil holder and magnet holder serve dual functions: holding the coils and magnets for magnetic drive, and providing stopper portions to regulate the movable body's range. This integration eliminates the need for separate stopper structures outside the movable body, thereby reducing the actuator's planar area while maintaining reliable movable range regulation.
2Reliability
If the stopper mechanism is provided outside the movable body, then the movable range can be constrained, but the device complexity increases
Solution Approach 1:
The coil holder and magnet holder are designed as multi-functional components. They not only perform their primary function of holding coils and magnets for magnetic drive operation, but also incorporate stopper portions that constrain the movable body's range. This universal design reduces the total number of components and simplifies the overall device structure while ensuring reliable movable range constraint.
3Area of stationary object
If the first magnet has a dimension in the third direction shorter than in the second direction, then the stopper mechanism for the third direction can be configured using space on both sides, but the magnetic drive efficiency may be affected
Solution Approach 1:
The magnet dimensions are optimized locally for each directional requirement. The first magnet has a shorter dimension in the third direction compared to the second direction, allowing stopper portions to be configured on both sides in the third direction for compactness. Meanwhile, the sufficient dimension in the second direction maintains effective magnetic drive efficiency for movement in that direction. This local quality adjustment resolves the contradiction between compactness and drive efficiency.
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 reduces the overall size of the actuator while effectively regulating the movable range, preventing disconnection of coils and tilting, and maintaining high vibration linearity and reliability.
Implementation Method 1
a first magnetic drive circuit which generates a driving force to drive the movable body in a second direction orthogonal to a first direction
Implementation Method 2
a second magnetic drive circuit which generates a driving force to drive the movable body in a third direction orthogonal to the first direction and crossing the second direction
Data Source
AI summary
An actuator is provided. In order to reduce the planar area of an actuator, a first magnetic drive circuit and a third magnetic drive circuit that vibrate a movable body in an X direction with respect to a support are provided respectively on both sides, in a Z direction, of a second magnetic drive circuit that vibrates the movable body in a Y direction with respect to the support. The movable ranges, in the X direction and the Y direction, of the movable body with respect to the support are regulated by a stopper mechanism constituted between a first magnet and a first coil holder holding a first coil, a stopper mechanism constituted between a second magnet and a second coil holder holding a second coil, and a stopper mechanism constituted between a third magnet and a third coil holder holding a third coil.