Horizontal Vibration Generator Resolving Friction and Space Trade-offs
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Solution Overview
Problem
Existing vibration generators in devices like mobile phones face issues with reduced lifespan due to mechanical friction and inability to achieve both long lifespan and high vibration force with a thin construction, particularly in vertical moving type generators, and have challenges with lead wire connections and assembly efficiency.
Innovation Solution
A horizontal vibration type generator with an open casing, a vibration part including a weight and spring, and a magnetic field generating part using an air-core coil and magnet to produce horizontal vibrations, integrated with a circuit board for surface mounting and automated manufacturing, eliminating the need for additional lead wires and improving assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a brush DC motor is used to generate vibration, then vibration can be produced, but mechanical friction between the brush and commutator reduces the expected life span
Solution Approach 1:
The patent replaces the mechanical brush-commutator system with an electromagnetic drive system consisting of a coil and magnet. The coil generates a magnetic field that interacts with the magnet to produce vibratory motion, eliminating all mechanical contact and friction between moving parts. This substitution of mechanical system with electromagnetic system directly resolves the contradiction by removing the source of mechanical friction while maintaining the vibration generation function.
2Reliability
If a vertical vibration motor using resonance is used, then long life span can be achieved, but a mechanically large space is required for upward and downward movement
Solution Approach 1:
The patent changes the direction of vibration from vertical (upward and downward movement) to horizontal (side-to-side movement). By orienting the magnet and coil arrangement horizontally, the vibration part moves laterally within the casing rather than vertically, significantly reducing the required mechanical space in the vertical dimension while maintaining the resonance-based vibration mechanism for long life span.
3Reliability
If lead wires with soldering connections are used to connect power supply, then electrical connection can be established, but connection reliability is reduced due to poor soldering, wire breaks, or shorts
Solution Approach 1:
The patent integrates the power supply unit directly into the casing structure, merging previously separate components (power supply, casing, and wiring system) into a unified assembly. The power supply is mounted inside the casing with its terminals directly accessible, eliminating the need for external lead wires and soldering connections. This consolidation improves connection reliability by removing fragile wiring while simplifying the overall device structure.
4Ease of manufacture
If additional space is formed in the device for receiving a protruding power supply unit, then the power supply can be installed, but the device space is increased
Solution Approach 1:
The patent nests the power supply unit within the existing casing volume rather than adding external protrusions. The power supply is positioned inside the casing alongside other components (vibration part, spring, coil), utilizing otherwise unused internal space. This nesting approach allows power supply installation without increasing the external dimensions of the device, maintaining compact form factor while enabling easy manufacturing assembly.
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 enhances the lifespan and vibration force of the generator while maintaining a thin construction, improves connection reliability, and reduces production costs by enabling surface mounting and automated assembly processes.
Implementation Method 1
a magnetic field generating part including a magnet that generates an electromagnetic force so as to cause the vibration part to horizontally vibrate
Implementation Method 2
produces horizontal vibration using the phenomenon of resonance which occurs by causing oscillation in an electromagnetic force having the same frequency as the intrinsic vibration frequency of the spring
Data Source
AI summary
The invention relates to a vibration generator which is used in devices, such as mobile phones, requiring a vibration mode. More specifically, the invention relates to a horizontal vibration type vibration generator which includes a casing that is open on one surface thereof, a vibration part having a weight provided inside the casing, and a spring mounted inside the casing, and which produces horizontal vibration by using the phenomenon of resonance which occurs by causing oscillation in an electromagnetic force having the same frequency as the intrinsic vibration frequency of the spring, and which solves the problem of a reduction in the life span of the vibration generator due to mechanical friction as seen in existing mechanical vibration generators, and generates a large vibration force despite having a thin construction unachievable in a vertical moving type vibration generator. The invention also relates to a production method of the vibration generator.