Vibration Module Bracket Structure for Stable Coil Isolation
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Solution Overview
Problem
Existing vibration generating devices in portable electronic devices face challenges in achieving desired vibration characteristics due to the deformability of thin housings and increased manufacturing burdens from bonding processes, particularly with the vibration of coils and magnets.
Innovation Solution
A vibration generating device with a resilient member between the housing and the vibrator, a bracket with a coil-mounting portion, and connection portions bonded using laser welding, which allows for stable vibration and cost-effective manufacturing by minimizing the impact of housing deformation and simplifying bonding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the permanent magnet vibrates to generate vibrations, then the vibration generating function is achieved, but the coil may also vibrate in accordance with vibrations of the magnet, causing desired vibration characteristics to not be obtained
Solution Approach 1:
The device is divided into separate functional components: the magnet assembly that vibrates to generate vibrations is separated from the coil assembly that generates the magnetic field. The coil is mounted on a coil-supporting member that is bonded to the housing, while the magnet is mounted on a resilient member that allows it to vibrate independently without causing the coil to vibrate, thus achieving desired vibration characteristics.
2Reliability
If the coil-supporting member is bonded to the bottom of the housing by welding, then the coil is securely fixed, but the task burden and time required for bonding increases
Solution Approach 1:
The patent replaces the mechanical welding process with adhesive bonding to attach the coil-supporting member to the housing. This substitution eliminates the complex welding operation, reducing the task burden and time required for bonding while still achieving secure fixation of the coil assembly.
3Weight of moving object
If the housing is made thin to reduce device size, then the portability is improved, but the housing becomes deformable and affects vibration performance
Solution Approach 1:
The patent introduces a resilient member as an intermediary between the magnet and the housing. This resilient member absorbs and isolates the vibrations generated by the magnet, preventing them from being transmitted to the thin housing and causing deformation. This allows the housing to remain thin for portability while maintaining stable vibration performance.
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 provides a vibration generating device with desired vibration characteristics while reducing manufacturing costs and time, ensuring stable operation and improved workability in electronic devices.
Implementation Method 1
a coil configured to generate a magnetic field that causes the vibrator to vibrate
Implementation Method 2
a resilient member between the housing and the vibrator
Implementation Method 3
connection portions bonded to the respective bracket supports
Data Source
AI summary
A vibration generating device includes a housing, a vibrator including a magnet, and a resilient member between the housing and the vibrator. The vibration generating device includes a coil configured to generate a magnetic field that causes the vibrator to vibrate. The vibration generating device includes a bracket including a coil-mounting portion on which the coil is mounted. The housing includes bracket supports provided at ends of two opposing side surfaces among the four side surfaces of the housing, the ends being situated opposite ends, of the two opposing side surfaces, to which the bottom of the housing is connected. The bracket includes connection portions bonded to the respective bracket supports. The bracket supports of the housing and the connection portions of the bracket are connected together in a state in which the bracket is inserted into a space of the housing.