Engraving Vibration Generator With Fixed Coil and Spring-Supported Mover
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Solution Overview
Problem
Conventional vibration generators for engraving apparatuses are limited in adapting to fine vibrations, resulting in imprecise engraving due to the vibration of the coil and movable piece, which affects the quality of the image engraved on mediums like passports and cards.
Innovation Solution
A vibration generator design featuring a stationary permanent magnet, a yoke with a coil fixed to it, and four springs supporting a movable piece that vibrates relative to the yoke when current is applied, allowing for precise oscillation and fine vibration output, which is then transmitted to a stylus holder to engrave images on a medium in the X-axis, Y-axis, and Z-axis directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the coil and movable piece are allowed to vibrate together in conventional design, then the structure is simpler, but the vibration precision deteriorates
Solution Approach 1:
The vibration generator is divided into two independent parts: a fixed coil assembly and a movable piece assembly. The movable piece (including magnet and arm) can vibrate independently without the coil moving, achieving fine vibration precision. The coil is fixed to the yoke while the movable piece is supported by springs, creating separate vibration zones that resolve the contradiction between simplicity and precision.
2Manufacturing precision
If the coil is fixed to the yoke, then the vibration precision improves, but the device complexity increases
Solution Approach 1:
The coil and yoke are merged into a single fixed assembly, while the movable piece with magnet and arm forms a separate vibrating assembly. This merging approach simplifies the overall structure by reducing the number of independent components while maintaining the ability to achieve fine vibration through the spring-supported movable piece.
3Manufacturing precision
If the movable piece is supported by four springs, then the fine vibration capability improves, but the device complexity increases
Solution Approach 1:
The four springs are positioned at specific locations around the movable piece to provide localized support and vibration isolation. This localized spring support system allows the movable piece to vibrate precisely in response to magnetic forces while the coil remains fixed, achieving fine vibration control without requiring complex support mechanisms throughout the entire structure.
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 solution enables accurate and precise engraving by allowing the movable piece to oscillate finely, improving the resolution and quality of the images engraved on the medium, enhancing the aesthetic value and security against falsification.
Implementation Method 1
current is applied to a coil supported with the movable piece in both forward and backward directions to switch magnetic poles of the movable piece. With this, the movable piece on the electromagnet is vibrated relatively to the permanent magnet.
Implementation Method 2
The springs have a teardrop sectional shape with a pointed end on a first side and an arc-shaped portion on a second side, the pointed ends of the springs supported with the respective spring supports, and the arc-shaped portions of the springs supporting the movable piece on both sides of the central portion.
Data Source
AI summary
The present invention provides a vibration generator capable of accurately adapting to fine vibration. The vibration generator has a stationary permanent magnet, a yoke for the permanent magnet, a coil fixed to the yoke, four springs provided to the yoke, and a movable piece supported with the yoke through the four springs. The end portions of the movable piece are arranged between the respective two pairs of the projections with first gaps. The central portion of the movable piece is arranged in the through-hole with the second gaps, the second gaps having a size to allow oscillation, which is regulated by the first gaps, of the central portion of the movable piece.