Anti-tilting Unit for Linear Vibration Device
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Solution Overview
Problem
Conventional linear vibration generating devices experience tilting issues beyond the overlap zone with a yoke, leading to noise and impact due to physical contact and deformation of elastic members, which affects durability and vibration frequency.
Innovation Solution
Incorporation of an anti-tilting unit coaxially coupled to the yoke, which can be non-magnetic with a cylindrical or triangular shape, and a magnetic fluid damping member to prevent tilting and absorb impacts, ensuring stable operation and reduced noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vibrator oscillates beyond the overlap zone with the yoke, then the vibration amplitude is increased, but the tilting of the vibrator occurs causing noise and impact
Solution Approach 1:
A non-magnetic body is introduced as an intermediary component between the vibrator and the external environment. This non-magnetic body prevents direct contact between the tilting vibrator and surrounding structures, thereby eliminating noise and impact while allowing the vibrator to maintain large oscillation amplitudes beyond the yoke overlap zone
Solution Approach 2:
The non-magnetic body is positioned in advance to counteract the tilting motion of the vibrator before it can cause harmful contact. By providing preliminary restraint against tilting, the system prevents noise and impact generation while preserving the desired vibration amplitude
2Ease of operation
If the vibrator tilts beyond the overlap zone, then lateral movement increases, but physical contact with the case occurs causing deformation of elastic members
Solution Approach 1:
The non-magnetic body serves as a protective intermediary that separates the vibrator from the case structure. It allows lateral movement during vibration while preventing harmful physical contact that would deform elastic members or damage the case, thereby maintaining system reliability
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 anti-tilting unit effectively suppresses tilting beyond the yoke overlap zone, reducing noise and impact, enhancing the reliability and durability of the device with stable vibration performance and extended lifespan.
Implementation Method 1
uses interactions between an electric field generated by a coil and a magnetic field of a permanent magnet surrounding the coil to linearly oscillate the weight so that a desired vibration may be generated
Implementation Method 2
An elastic member 120 is interposed between the bracket 102 and the weight 112 to elastically support the vibrator 115 and limit its amplitude so as to ensure smooth vibration
Implementation Method 3
a magnetic fluid damping member to prevent tilting and absorb impacts
Data Source
AI summary
A linear vibration generating device. The linear vibration generating device includes a vibrator including an annular magnet and a weight surrounding the magnet; a stator including a coil disposed at a center of the magnet and a yoke surrounding the coil; an elastic member disposed between the vibrator and the stator to elastically support the vibrator; and an anti-tilting unit coaxially coupled to a top of the yoke in a predetermined height. The anti-tilting unit is a non-magnetic body with a cylindrical shape having an outer diameter equal to or greater than a diameter of an outermost portion of the yoke and smaller than an inner diameter of the magnet.