Voice Coil Motor Lens Module Assembly Against Component Separation
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Solution Overview
Problem
The large weight of voice coil motor components poses a risk of separation, compromising the precision and stability of the lens focusing mechanism in lens modules.
Innovation Solution
The voice coil motor device incorporates a fixed component with a housing, base, and bracket design that uses positioning posts and grooves to securely fix the movable component, along with elastic pieces and permanent magnets, to maintain precise alignment and reduce separation risks through enhanced adhesion and balancing forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the weight of voice coil motor components is increased, then the structural strength and stability are improved, but the risk of separation between components increases
Solution Approach 1:
The voice coil motor is divided into distinct components (fixed component, movable component, magnetic field generating component) that can be separately manufactured and assembled. This segmentation allows each component to be optimized independently while reducing overall weight, yet maintains structural integrity through precise positioning mechanisms.
Solution Approach 2:
The movable component is accommodated within the fixed component, creating a nested structure where the movable component fits into the housing of the fixed component. This nesting arrangement reduces the overall device footprint and weight while maintaining structural strength through the housing's protective enclosure.
2Reliability
If the weight of voice coil motor components is reduced, then the risk of separation is decreased, but the structural strength and stability deteriorate
Solution Approach 1:
The patent employs composite material structures in the housing and components, combining materials with different properties to achieve both weight reduction and structural strength. The housing uses materials that provide both lightweight characteristics and sufficient mechanical strength to prevent component separation.
Solution Approach 2:
Positioning posts and grooves are pre-formed during manufacturing to ensure precise alignment and prevent separation before the device is fully assembled and operational. This preliminary positioning action ensures that components remain stable and properly aligned throughout operation without requiring additional weight for stability.
3Reliability
If positioning mechanisms are added to prevent separation, then component stability is improved, but device complexity increases
Solution Approach 1:
The positioning function is merged into the housing structure itself through integrated positioning posts and grooves, rather than being separate additional components. This merging approach provides stable component positioning while minimizing device complexity by combining multiple functions into unified structural elements.
Solution Approach 2:
Positioning posts and grooves act as intermediary elements between the fixed component housing and the movable component, facilitating precise alignment and stable positioning without requiring complex fastening mechanisms. These intermediaries simplify the overall structure while ensuring component stability.
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 ensures high-precision assembly and reduces the risk of component separation, maintaining stable focusing capabilities and extending the device's operational reliability.
Implementation Method 1
the magnetic fields between the movable component (20) and the fixed component (10) interact to drive the movable component (20) to move inside the fixed component (10) along an optical axis
Implementation Method 2
along with elastic pieces and permanent magnets, to maintain precise alignment and reduce separation risks through enhanced adhesion and balancing forces
Data Source
AI summary
A voice coil motor device includes a fixed component and a movable component. The movable component holds a lens. The movable component is accommodated in the fixed component. The fixed component includes a housing and a base. The housing defines a first hole and includes first side walls. The base defines a second hole. Centers of the first hole and the second hole are on an optical axis. The movable component is accommodated in the housing. The first hole receives the lens. One end of the movable component is received in the second hole of the base. The first side walls of the housing define a plurality of positioning holes, and the base includes a plurality of positioning posts. Each of the positioning posts is embedded in a corresponding one of the positioning holes.