Flanged Elastic Support Arm for Stiffer Vibration Motors
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Solution Overview
Problem
Existing vibration motors have insufficient support stiffness, leading to low vibration modal performance and anisotropic vibration issues.
Innovation Solution
The vibration motor incorporates an elastic support assembly with a first and second fixed part, a connecting elastic support arm, and flanges to enhance stiffness, along with a stator, magnet, and damping member to improve vibration mode and reduce anisotropic vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the structure of the elastic support is restricted, then the device complexity is reduced, but the support stiffness requirement cannot be satisfied
Solution Approach 1:
The patent adds flanges extending in directions perpendicular to the main support arm, transitioning from a one-dimensional support structure to a three-dimensional rigid framework. This dimensional expansion significantly increases support stiffness without adding multiple separate support components, thus resolving the contradiction between stiffness requirements and structural complexity.
2Strength
If the vibration modal of the vibrator is low, then the manufacturing precision requirement is reduced, but the support stiffness requirement cannot be satisfied
Solution Approach 1:
The patent applies local quality enhancement by adding flanges specifically at critical positions of the elastic support where stiffness is most needed. This localized structural reinforcement provides high support stiffness without requiring high manufacturing precision across the entire vibrator assembly, resolving the contradiction between support stiffness and manufacturing precision requirements.
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 enhanced elastic support assembly increases support stiffness, raises the operating frequency of the vibration motor, and reduces anisotropic vibration, improving overall vibration performance.
Implementation Method 1
an elastic support arm connecting the first fixed part and the second fixed part
Implementation Method 2
a first flange formed by bending and extending from the first elastic support arm
Implementation Method 3
a magnet accommodated in the accommodation cavity and arranged between the stator and the weight; the stator comprises a coil bracket and a coil wound around the coil bracket
Data Source
AI summary
The present invention provides a vibration motor having a housing with an accommodation space; a vibrator; a stator; and an elastic support assembly suspending the vibrator in the accommodation space. The elastic support assembly includes one elastic support between the vibrator and the housing. The elastic support includes a first fixed part, a second fixed part, a first elastic support arm connecting the first fixed part and the second fixed part, and spaced from the vibrator, and a first flange formed by bending and extending from the first elastic support arm. The first flange keeps a distance from the vibrator or the housing. Such a vibration motor has enhanced stiffness.