Galvanometer Positioning Tool Spherical Mount for Laser Printer
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Solution Overview
Problem
The precision and accuracy of the mounting position of the galvanometer in laser printers are affected by the mounting orientation, which can impact the spot position of the laser beam on the photosensitive drum.
Innovation Solution
A galvanometer positioning tool is developed, featuring a base with a concave spherical surface, a bracket with a positioning assembly, and a rotation assembly. This tool allows the galvanometer to rotate 360° relative to the base, ensuring the reflection center remains unchanged, and enables precise adjustment of the galvanometer's orientation using elastic pieces and screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the galvanometer is mounted with fixed orientation, then the mounting position is stable, but the spot position precision on the photosensitive drum is affected
Solution Approach 1:
The patent employs a spherical positioning mechanism where the galvanometer is mounted on a bracket that can rotate around a spherical center point. The positioning assembly includes a spherical surface that contacts the galvanometer's reflection center, allowing the galvanometer to be precisely positioned and oriented in three-dimensional space while maintaining a fixed reflection center location. This curved geometry enables precise spot positioning on the photosensitive drum without requiring complex multi-component adjustment mechanisms.
2Measurement precision
If the galvanometer mounting orientation is adjusted, then the spot position accuracy is improved, but the mounting operation becomes more difficult
Solution Approach 1:
The patent implements a dynamic mounting structure where the galvanometer can be rotated and positioned on the bracket before being fixed in the final position. The rotation assembly allows the galvanometer to rotate around the y-axis, and the positioning assembly enables movement along the x and z axes. This dynamic adjustment capability allows operators to easily achieve precise spot positioning during assembly and maintenance without requiring complex alignment procedures or specialized tools.
3Manufacturing precision
If a complex positioning mechanism is used, then the galvanometer mounting precision is improved, but the device structure becomes more complex
Solution Approach 1:
The patent integrates multiple positioning functions into a unified compact structure. The bracket combines the rotation assembly (for y-axis rotation) and the positioning assembly (for x and z axis positioning) into a single integrated component. The spherical positioning mechanism merges the functions of locating the reflection center, enabling rotation, and maintaining orientation into one coherent system. This merging reduces the number of separate components and simplifies the overall tool structure while achieving high mounting precision.
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 galvanometer positioning tool improves the precision and accuracy of the galvanometer's mounting position, allowing for precise adjustment of the laser beam's spot position on the photosensitive drum, thereby enhancing the image output quality of the laser printer.
Implementation Method 1
a positioning assembly is provided on a side surface of the bracket facing the bearing surface, the positioning assembly has a plurality of contact points abutted against the first concave spherical surface, a plurality of the contact points are all located on a virtual spherical surface, a spherical center of the virtual spherical surface coincides with a spherical center of a sphere where a first convex spherical surface is located
Implementation Method 2
the first rotation rod is rotatably connected to the base, the first rotation rod is capable of rotating relative to the base with an axis of the first rotation rod as a rotation axis, the first rotation rod is capable of driving the bracket to rotate with the y-axis of the galvanometer as a rotation axis when the first rotation rod rotates relative to the base
Data Source
AI summary
A galvanometer positioning tool and a laser printer. The galvanometer positioning tool includes: a base provided with a bearing surface and provided with a first concave spherical surface; a bracket placed on the bearing surface, a positioning assembly being provided on a side surface of the bracket facing the bearing surface, a galvanometer being mounted on the bracket; and a reflection center of the galvanometer located on the spherical center of the sphere where the first concave spherical surface is located. The rotation assembly includes a first rotation rod fixedly connected to the second rotation rod and rotatably connected to the base. The second rotation rod is slidably connected to the bracket, and when the first rotation rod rotates relative to the base, the first rotation rod is capable of driving the bracket to rotate with the y-axis of the galvanometer as a rotation axis.