Motor-Driven Focusing Device Screw Rod Mechanism
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Solution Overview
Problem
Manual rotation of a focusing ring during lens module testing can cause the ring to squeeze the module, reducing focusing accuracy.
Innovation Solution
A focusing device comprising a screw rod with a driving portion, a movable portion, and a threaded portion, along with a focusing gear and a height adjusting ring, allows for motor-driven rotation of the screw rod, which engages with the focusing gear to adjust the focus without physically squeezing the lens module, thereby maintaining accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual rotation of the focusing ring is used, then the operation is simple and direct, but the focusing ring squeezes the lens module reducing focusing accuracy
Solution Approach 1:
The patent replaces the manual mechanical rotation of the focusing ring with an automated motor-driven screw rod system. The motor rotates the screw rod, which through threaded engagement with the focusing gear, precisely adjusts the lens module position without manual handling, thereby eliminating squeezing forces while maintaining operational control.
Solution Approach 2:
The patent introduces a screw rod and focusing gear mechanism as intermediaries between the motor and the lens module. This intermediary mechanical transmission system allows precise focusing adjustment through threaded motion conversion, eliminating direct manual contact with the lens module while maintaining controllable focusing operation.
2Measurement precision
If motor-driven rotation of the screw rod is used, then focusing accuracy is maintained without squeezing the lens module, but the device complexity increases
Solution Approach 1:
The patent divides the focusing system into distinct functional segments: a motor for rotation, a screw rod for linear motion conversion, a focusing gear for position adjustment, and a height adjusting ring for fine-tuning. This segmentation allows each component to perform its specific function efficiently, reducing overall system complexity while maintaining high focusing accuracy.
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 precise and accurate focusing operations by eliminating manual handling-induced distortion, enhancing the accuracy of lens module adjustments and preventing mechanical stress on the module.
Implementation Method 1
a screw rod with a driving portion, a movable portion, and a threaded portion, along with a focusing gear
Data Source
AI summary
A focusing device includes a fixing base, a screw rod, a focusing gear, a height adjusting ring, and a focusing ring. A first through hole is defined in the fixing base, the screw rod with a first thread is movably mounted on the fixing base. The focusing gear is also mounted on the fixing base and defines a third through hole corresponding to the first through hole. An outer wall of the focusing gear has an engaging portion meshing with the first thread. The focusing ring is movably received in the third through hole and located on a side of the height adjusting ring away from the fixing base. The height adjusting ring can adjust a distance between the focusing ring and a lens module to avoid distortion of an optical lens in any circumstances during focusing.