Optical Scanning Bracket with Asymmetric Surfaces for Module Adjustment
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Solution Overview
Problem
Conventional optical scanning devices face difficulties in accurately positioning and fixing light-emitting modules, particularly in rotating them circumferentially and tilting them vertically, which affects the stability and precision of image formation.
Innovation Solution
The optical scanning device incorporates a container unit with a unique arrangement of protruding portions and a bracket design for the light-emitting modules, allowing for stable fixation and adjustable positioning in both vertical and horizontal directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional light-emitting modules are used without special bracket design, then the structure is simple, but position-adjusting and fixation are difficult
Solution Approach 1:
The bracket is designed with a dynamic adjustment mechanism that allows the light-emitting module to be tilted in the vertical direction and rotated circumferentially about the light-emission direction. The bracket includes a first surface perpendicular to the optical axis and a second surface at an angle, enabling multi-directional adjustment while maintaining stable fixation through the angled geometry.
Solution Approach 2:
The bracket employs asymmetric surface geometry with a first surface perpendicular to the optical axis and a second surface inclined at an angle. This asymmetric design provides differentiated functional zones: one for vertical tilting adjustment and another for circumferential rotation, solving the positioning difficulty without requiring a completely complex structure.
2Adaptability or versatility
If light-emitting modules are fixed without circumferential rotation capability, then the fixation is stable, but the modules cannot be adjusted in the main scanning direction
Solution Approach 1:
The bracket incorporates a dynamic adjustment mechanism that enables the light-emitting module to be rotated circumferentially about the light-emission direction while maintaining stable fixation. The angled second surface of the bracket works with the container's protruding portions to provide both adjustment capability and reliable positioning during operation.
Solution Approach 2:
The adjustment function is segmented into two independent degrees of freedom: vertical tilting (via the angled second surface) and circumferential rotation (via the interaction with protruding portions). This segmentation allows each adjustment motion to be handled independently, maintaining fixation stability while providing versatile positioning capability.
3Reliability
If the container has a simple bottom wall without protruding portions, then the structure is simple, but the light-emitting modules cannot be stably fixed
Solution Approach 1:
The container's bottom wall is segmented into a flat first surface and multiple protruding portions. This segmentation creates distinct functional zones: the flat surface provides a base for the bracket, while the protruding portions engage with the bracket's angled surface to provide stable fixation and prevent unwanted movement of the light-emitting modules.
Solution Approach 2:
The protruding portions act as intermediary elements between the container and the bracket. They transmit and distribute the fixation force, enabling stable anchoring of the light-emitting modules without requiring the container itself to be overly complex. The protruding portions serve as mechanical mediators that simplify the overall fixation system.
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
This configuration enables precise positional adjustment and stable fixation of the light-emitting modules, enhancing the stability and accuracy of image formation in optical scanning devices.
Implementation Method 1
The coupling lens converts the laser beam emitted from the light-emitting element into a direction generally parallel to the main scanning direction and moreover condensing the laser beam to a sub scanning direction
Implementation Method 2
The first scanning lens condenses the laser beam reflected by the polygon mirror
Implementation Method 3
The second scanning lens makes the laser beam, which has passed through the first scanning lens, form an image on the circumferential surface of the image carrier
Data Source
AI summary
The optical scanning device includes a light source unit. The light source unit has a plurality of light-emitting modules for each emitting a laser beam. The light-emitting modules are placed in array in an up/down direction between neighboring ones of protruding portions. An outermost diameter of a bracket in a region interposed between the protruding portions of the light-emitting modules placed on an upper side is larger than an outermost diameter of the bracket in a region interposed between the protruding portions of the light-emitting modules placed on a lower side. A width between the protruding portions in a region where the light-emitting modules placed on the upper side are interposed therebetween is larger than a width between the protruding portions in a region where the light-emitting modules placed on the lower side are interposed therebetween.