Opposing Movable Sections Actuator for Vibration Cancellation
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Solution Overview
Problem
Existing electric beauty devices face challenges in miniaturization and effective vibration suppression due to the need for dynamic vibration absorbers and power conversion mechanisms, which limit high-speed driving and user comfort.
Innovation Solution
An actuator design featuring a coil with two magnetized movable sections moving in opposite directions on the same axis, eliminating the need for dynamic vibration absorbers and power conversion mechanisms, and utilizing magnetic springs for elastic holding to enable miniaturization and efficient vibration cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a dynamic vibration absorber is added to suppress vibration, then vibration suppression is improved, but device volume increases
Solution Approach 1:
The patent combines the vibration suppression function with the main actuator structure by making the movable section itself perform reciprocating motion in opposite directions. This integrates the vibration cancellation mechanism into the existing actuator rather than adding a separate dynamic vibration absorber, thereby suppressing vibration while avoiding increased device volume.
Solution Approach 2:
The movable section is divided into two segments that move in opposite directions. By segmenting the movable section and driving them in opposite directions, the patent achieves vibration cancellation through the opposing motions of the two segments, eliminating the need for additional vibration suppression components.
2Ease of operation
If a power conversion mechanism is added to drive movable sections, then motion control is improved, but device volume increases
Solution Approach 1:
The patent directly drives the two movable sections using the coil and magnet assembly without introducing a separate power conversion mechanism. The coil generates magnetic force that directly actuates both movable sections to move in opposite directions, combining the driving function into the actuator structure itself and avoiding increased device volume.
3Volume of stationary object
If the actuator is miniaturized by removing vibration suppression components, then device volume decreases, but vibration suppression capability is reduced
Solution Approach 1:
The movable section is segmented into two parts that move in opposite directions, enabling vibration cancellation to be achieved through the motion characteristics of the segments themselves rather than through separate vibration suppression components. This allows miniaturization while maintaining vibration suppression capability.
Solution Approach 2:
The patent converts the potentially harmful vibration generated by the actuator into a beneficial effect by using the reciprocating motion of the two segmented movable sections to cancel each other's vibration. The vibration that would normally be harmful is transformed into a mechanism for vibration suppression.
4Device complexity
If the actuator structure is simplified to enable miniaturization, then device complexity decreases, but vibration cancellation effectiveness is reduced
Solution Approach 1:
The patent merges the vibration cancellation function into the basic actuator structure by having the two movable sections move in opposite directions. This integration achieves vibration cancellation without adding complex separate mechanisms, maintaining simplicity while ensuring effectiveness.
Solution Approach 2:
By segmenting the movable section into two parts and driving them in opposite directions, the patent achieves vibration cancellation through a relatively simple structural modification rather than through complex vibration suppression mechanisms, thereby maintaining low device complexity while ensuring vibration cancellation effectiveness.
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 effectively suppresses vibration transmission to the user, allows for miniaturization, and enables high-speed driving, improving user comfort and device design flexibility.
Implementation Method 1
a fixing section that includes a coil; a first movable section that includes a first magnet that is magnetized in an axial direction of the coil... when a current flows to the coil, the first movable section and the second movable section move in opposite directions
Implementation Method 2
the first movable section being disposed on an inner side of the one end portion of the coil movably in the axial direction of the coil in a state where the first movable section is elastically held
Data Source
AI summary
An actuator has: an affixed section having a coil; a first mobile section that is elastically held and disposed so as to allow movement in the axial direction inside one end of the coil, and has a first magnet magnetized in the axial direction of the coil and disposed on one end in the axial direction; and a second mobile section that is elastically held and disposed so as to allow movement in the axial direction inside another end of the coil, and has a second magnet magnetized in the axial direction and disposed on the other end in the axial direction. The first and second magnets are disposed such that identical magnetic poles are in the same direction in the axial direction, and the first and second mobile sections move in opposite directions along the same axis when a current is applied to the coil.