Lens Drive Suspension Wire Equalization
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Solution Overview
Problem
In lens drive devices, movement variations of movable objects due to conductive wiring lines connecting the base member and movable objects lead to instability during actuation, necessitating a solution to suppress these variations for stable movement.
Innovation Solution
A lens drive device design featuring X-axis and Y-axis movable objects, actuators, and conductive suspension wires with aligned connection heights to equalize elastic influences, along with holding portions to stabilize the movement, ensuring stable operation by minimizing movement variations and securing large wire lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive wiring lines connect the base member and movable objects, then electrical connectivity is achieved, but movement variation and instability occur
Solution Approach 1:
The patent applies equipotentiality by making the connection heights of suspension wires to the movable objects equal. This equalizes the elastic influence from all wiring lines, creating a balanced mechanical environment that suppresses movement variation. The connection positions are specifically designed to be at the same height relative to the base member, ensuring uniform mechanical properties across all connected components.
Solution Approach 2:
The patent changes the physical parameters of the wiring system by using suspension wires with equal lengths and equal connection heights. This parameter standardization transforms the wiring configuration from a source of mechanical variation to a balanced system where elastic influences are equalized, thereby improving movement stability without adding complexity.
2Reliability
If suspension wires connect movable objects to base member, then electrical connection is maintained, but elastic influence causes movement variation
Solution Approach 1:
The patent eliminates the harmful elastic influence by creating equipotential conditions for all suspension wires. By ensuring equal connection heights and equal lengths, the elastic forces from all wires balance each other out, preventing movement variation. This transforms the wiring system from a source of mechanical disturbance to a neutral element that maintains electrical connectivity without affecting movement stability.
3Adaptability or versatility
If multiple movable objects are provided for shake correction and zoom functions, then functional versatility is improved, but movement stability deteriorates due to wiring line influences
Solution Approach 1:
The patent enables multiple movable objects to operate stably by applying equipotentiality to their connection system. Each movable object (for shake correction and zoom functions) is connected via suspension wires with equal lengths and equal connection heights, ensuring that elastic influences are balanced across all objects. This allows the system to maintain both functional versatility and movement stability simultaneously.
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 design effectively stabilizes the movement of X-axis and Y-axis movable objects, suppressing variations and enhancing the stability of the lens drive device's operation, even with the presence of suspension wires, by aligning connection heights and using holding portions to maintain the gravity center alignment.
Implementation Method 1
the first suspension wire and the second suspension wire have almost the same lengths. As a result, an influence (elastic influence) on the X-axis movable object from the second suspension wire when the X-axis movable object moves and an influence (elastic influence) on the Y-axis movable object from the first suspension wire when the Y-axis movable object moves can be equalized (aligned)
Data Source
AI summary
A lens drive for driving a lens having, in seriatum along the optical axis of the lens, a base member, an X-axis movable object, a Y-axis movable object and a lens carrier. The base member, the X-axis movable object, the Y-axis movable object and the lens carrier overlap circumferentially around the optical axis in the direction of the optical axis. A first conductive suspension wire connects wiring of the Y-axis movable object and the base member. A second conductive suspension wire connects wiring of the X-axis movable object and the base member. The first and second conductive suspension wires have substantially the same length.