Linear Vibration Assembly With Closed Magnetic Circuit
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Solution Overview
Problem
Conventional linear vibration generating apparatuses suffer from magnetic leakage, reduced vibration performance, slow reaction speed, and durability issues due to structural imperfections and component variability, particularly in the connection between the elastic body and vibration body.
Innovation Solution
A linear vibration generating apparatus with a magnetic closed circuit design, where a magnetic substance frame surrounds the fixed body, forming a complete magnetic loop, and a sandwich-type connection structure for the elastic bodies, allowing adjustable vibration frequency and improved durability through adjustable elastic body insertion and fixing positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional linear vibration generating apparatus is used, then vibrations are generated by the interaction between the coil and magnet, but magnetic leakage occurs and vibration performance is reduced
Solution Approach 1:
The magnetic circuit is segmented into multiple components: upper yoke, lower yoke, and side yokes, which are assembled together to form a complete closed magnetic circuit. This segmentation allows for precise construction of the magnetic path and reduces magnetic leakage.
Solution Approach 2:
The magnetic circuit components (upper yoke, lower yoke, side yokes) are merged together to form a complete closed magnetic circuit that surrounds the coil. This merging creates a continuous magnetic path that prevents magnetic leakage and improves vibration performance.
2Adaptability or versatility
If the elastic body is fixed in a conventional structure, then the vibration body is supported, but the fixing position cannot be adjusted and vibration frequency band is fixed
Solution Approach 1:
The elastic body's fixing position is made adjustable rather than fixed. The elastic body can be positioned at different locations on the vibration body frame, allowing the vibration frequency band to be adjusted according to different application requirements.
Solution Approach 2:
A groove structure is introduced as an intermediary element between the elastic body and the vibration body frame. The groove guides and constrains the elastic body to specific positions, enabling easy adjustment while maintaining structural integrity.
3Reliability
If the connection part between elastic body and vibration body is conventional, then the components are connected, but the connection part is structurally fragile and durability is reduced
Solution Approach 1:
The connection structure merges the elastic body, vibration body frame, and groove into an integrated assembly. The groove is formed as part of the vibration body frame structure, creating a unified connection system that distributes stress and prevents fragile connection points.
Solution Approach 2:
The elastic body is designed with a flexible structure that can deform elastically while maintaining connection integrity. This flexibility allows the connection to withstand vibration stresses without breaking, improving durability.
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 apparatus minimizes magnetic leakage, enhances vibration performance and reaction speed, and increases durability by forming a magnetic closed circuit and adjusting the elastic body's insertion depth and fixing position, thereby stabilizing vibration characteristics.
Implementation Method 1
vibrations are generated by shaking the weighted body in a horizontal direction with a force (Lorenz force) according to an interaction between an electric field generated by a coil and a magnetic field by a permanent magnet
Implementation Method 2
an electromagnetic force generated between the coil and the magnet and a physical elastic force provided by an elastic body have mutual resonant characteristics
Data Source
AI summary
A linear vibration generating apparatus includes a casing coupled to a lower cover so that a mounting space is formed inside the casing, a vibration body configured to vibrate in the mounting space in a first direction, a fixed body including a coil surrounded by the vibration body and including a yoke to which the coil is wound, and a pair of elastic bodies elastically supporting vibrations of the vibration body from between the casing and the vibration body. The vibration body includes a frame part which surrounds the fixed body and to which each of the pair of elastic bodies is connected, and includes a plurality of magnets mounted on an inner surface of the frame part facing the fixed body.