Optical Transmission Device Clipping Unit Backlash Reduction
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Solution Overview
Problem
Optical transmission devices face issues with noise generation due to friction and shaking during lens movement, and accuracy is compromised by backlash between clips and screw threads, which affects the precision of magnification and focusing adjustments.
Innovation Solution
An optical transmission device comprising a driving unit with a teethed transmitting member, a guide member, a frame with a guide part, a clipping unit with a main clip and a rotatable sub-clip, and a flexible member that radially and axially pushes the sub-clip towards the main clip, reducing noise and backlash by absorbing radial forces and eliminating thread misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the nut entirely contacts the screw when rotating, then the lens frame can be moved to achieve magnification adjustment and focusing, but noise is generated due to friction and shaking during the movement process
Solution Approach 1:
The nut is divided into two separate clips (first clip and second clip) that engage with opposite sides of the screw. This segmentation allows each clip to independently contact the screw, distributing the contact forces and reducing overall friction and shaking, thereby decreasing noise while maintaining effective lens frame movement.
2Object-generated harmful factors
If the main clip and sub-clip clip the screw along the radial direction, then noise due to friction and shaking is absorbed and noise is decreased, but backlash is easily generated between the main clip along the axis of the screw and the threads of the screw
Solution Approach 1:
The first clip and second clip are positioned asymmetrically on opposite sides of the screw, engaging with opposite sides of the screw threads. This asymmetric arrangement allows the clips to apply radial clamping forces that press the screw threads against the clips, eliminating axial play and backlash while maintaining noise reduction through radial force absorption.
3Strength
If a torsion spring is used for the sub-clip firmly close toward the main clip, then the sub-clip firmly closes toward the main clip, but accuracy of the optical transmission device is still decreased
Solution Approach 1:
The torsion spring mechanism is replaced with a flexible member that provides elastic deformation capability. This flexible member allows the first and second clips to firmly engage the screw while accommodating radial forces through elastic bending, eliminating the backlash and accuracy issues caused by the rigid torsion spring system while maintaining strong engagement force.
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 effectively decreases noise and backlash, enhancing the accuracy and precision of optical transmission devices by stabilizing the movement of lens components during magnification and focusing adjustments.
Implementation Method 1
a flexible member (5) disposed on the frame, firmly pushing the sub-clip (42) to the main clip (41)
Data Source
AI summary
An optical transmission device including a driving unit having a transmitting member, a guide member, a frame, a clipping unit and a flexible member is disclosed. The clipping unit has a main clip engaging with one side of the transmitting member, and a sub-clip engaging with the other side of the transmitting member. The flexible member pushes the main clip to the sub-clip, so that the sub-clip radially and axially approaches the transmitting member.