Linear Vibrator Parallel Vibration and Amplitude Limiting
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Solution Overview
Problem
Conventional linear vibrators used in consumer products increase the height of the device due to their movement perpendicular to the mounting surface, necessitating a solution that maintains functionality while reducing height and protecting the elastic members from excessive deformation.
Innovation Solution
A linear vibrator design featuring a housing with a base and cover, elastic members suspending a magnet assembly and weight, and a coil on a PCB, allowing vibration parallel to the base, with blocking rings and patches to limit amplitude and prevent plastic deformation of the elastic members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the moving unit moves perpendicular to the mounting surface, then the vibration function is achieved, but the height of the vibrator increases
Solution Approach 1:
The patent changes the vibration direction from perpendicular (vertical dimension) to parallel (horizontal dimension) with respect to the mounting surface. The moving unit vibrates along the direction parallel to the bottom wall of the base, which is perpendicular to the driving force direction. This dimensional change allows the vibrator to maintain its vibration function while significantly reducing the height requirement.
2Duration of action of moving object
If the elastic members are allowed to deform freely, then the moving unit can vibrate with larger amplitude, but the elastic members may undergo plastic deformation and fail
Solution Approach 1:
The patent incorporates blocking rings and blocking patches that are pre-positioned to limit the maximum deformation of elastic members before plastic deformation can occur. These blocking structures act in advance to prevent excessive displacement, ensuring the elastic members remain within their elastic deformation range during vibration operation.
Solution Approach 2:
The blocking rings and patches serve as protective structures that cushion the elastic members from excessive stress. By providing physical barriers at predetermined positions, these structures prevent the elastic members from undergoing damaging plastic deformation while still allowing sufficient vibration amplitude for effective operation.
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 reduced height and effective protection of elastic members, ensuring efficient tactile vibration generation without increasing the device's height and preventing damage to the elastic members during vibration.
Implementation Method 1
a coil mounted on the PCB. The base has a bottom wall, a plurality of sidewalls extending vertically from the bottom wall, and a blocking ring extending form a central portion of the bottom wall. The moving unit has a magnet assembly and at least a pair of patches. The moving unit vibrates along a direction parallel to the bottom wall.
Implementation Method 2
a number of elastic members connected to the housing, a moving unit suspended inside the housing by the elastic members
Data Source
AI summary
A linear vibrator is disclosed. The linear vibrator includes a housing having a base and a cover, a number of elastic members connected to the housing, a moving unit suspended inside the housing by the elastic members, a PCB covered by the housing and a coil mounted on the PCB. The base has a bottom wall, a plurality of sidewalls extending vertically from the bottom wall and a blocking ring extending form a central portion of the bottom wall. The moving unit has a magnet assembly and at least a pair of patches and vibrates along a direction parallel to the bottom wall, the coil is located right below the magnet assembly.