Linear Vibrator Axis-Free Shell Design for Assembly Stability
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Solution Overview
Problem
Conventional linear vibrators face challenges in assembly stability and reliability due to deformable axes and low reliability in their designs, affecting user experience in portable electronic devices.
Innovation Solution
A linear vibrator design featuring a shell with a receiving space containing a weight, magnet, coil, and elastic members, where the magnet and coil move relative to each other within the shell, facilitated by elastic members for stable movement and assembly, and connected to an external power and control unit for signal adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two magnets and a yoke are used with the weight completely in contact, then the linear motion is achieved, but the assembly is difficult and the axis deforms easily
Solution Approach 1:
The patent removes the traditional axis component entirely from the linear vibrator structure. Instead of using an axis to guide the reciprocating motion, the invention uses the inner wall of the shell as the guide surface, allowing the weight to move directly against the shell wall without requiring a separate axis component. This eliminates the axis deformation problem and simplifies the assembly process.
Solution Approach 2:
The patent combines the guiding function with the shell structure itself. The inner wall of the shell serves dual purposes: as the containment structure and as the guide surface for the weight's reciprocating motion. This merging of functions eliminates the need for separate guiding components and reduces assembly complexity.
2Reliability
If a coil surrounds the weight with a supporting structure, then the linear motion is achieved, but the reliability is low and it is unstable
Solution Approach 1:
The patent eliminates the separate supporting structure that was previously needed to hold the coil and guide the weight. The shell itself provides both the coil mounting surface and the guiding function, removing the unstable supporting structure component entirely.
Solution Approach 2:
The shell is designed to perform multiple functions simultaneously: it contains the magnetic components, provides the guiding surface for the weight's motion, and serves as the mounting structure for the coil. This multi-functionality reduces the number of separate components and improves overall structural stability.
3Volume of moving object
If the vibrator size is reduced for portable devices, then the portability is improved, but the assembly stability and reliability deteriorate
Solution Approach 1:
The patent merges multiple structural functions into the shell, allowing for compact design without compromising stability. The shell simultaneously provides containment, guidance, and support functions, enabling miniaturization while maintaining assembly stability through integrated design rather than multiple small separate components.
Solution Approach 2:
By removing unnecessary components like the separate axis and supporting structure, the patent reduces the overall volume and complexity of the vibrator, making it suitable for portable devices while actually improving reliability through the simplified, more stable integrated 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
This design enhances assembly stability, reduces volume, and improves reliability by allowing for simple assembly and effective signal control, enhancing user experience in portable devices.
Implementation Method 1
a coil (40)
Implementation Method 2
a first elastic member (50) and a second elastic member (60)
Implementation Method 3
a magnet (30)
Data Source
AI summary
A linear vibrator includes a shell, a first elastic member, a second elastic member, a weight, a magnet, and a coil. The shell has a receiving space, and first and second internal surfaces. The first elastic member and the second elastic member respectively contact the first internal surface and the second internal surface. The weight is mounted between the first elastic member and the second elastic member and has a receiving chamber. The magnet is mounted in the receiving chamber. The coil is located in the receiving chamber to cover the magnet and mounted on the shell. The linear vibrator is used for amplitude control and is compensated for by a printed circuit on the shell. The linear vibrator is small size, of simple structure, and has better performance.