Optical Module Metal Sheet Frame Vibration Attenuation
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Solution Overview
Problem
Existing original readers for facsimile units and scanners face issues with stability, reading accuracy, and size/weight reduction, leading to suboptimal performance in image quality and speed.
Innovation Solution
The design incorporates a metal sheet frame with a light source, a contracting optical system featuring a lens and mirror, and a line sensor for main and auxiliary scanning, with a drive source and gear system secured to the frame, and leaf springs to attenuate vibrations, improving rigidity and accuracy by positioning optical systems directly on the frame and using a metal sheet frame to reduce noise and enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional optical reader design is used with separate mounting structures for optical systems, then the device complexity and size are larger, but the reading accuracy and stability are insufficient
Solution Approach 1:
The patent integrates the first and second optical systems directly onto a single frame structure, eliminating separate mounting structures and reducing device complexity while improving reading accuracy through unified positioning and reduced mechanical errors
Solution Approach 2:
The optical system is divided into two distinct optical systems (first optical system with mirrors and second optical system with lens and CCD) that are separately optimized but integrated on the same frame, allowing independent optimization of each subsystem while achieving overall high precision
2Volume of moving object
If the optical systems are positioned closer to the original surface to reduce size, then the device size is reduced, but the stability and noise resistance deteriorate
Solution Approach 1:
The patent positions the optical systems at an optimized distance from the original surface, using the vertical dimension effectively to achieve compact size while maintaining stability through proper structural support and noise isolation in the horizontal dimension
3Weight of stationary object
If a lightweight frame structure is used to reduce weight, then the device weight is reduced, but the noise interference and vibration increase
Solution Approach 1:
The patent employs a frame structure made of metal sheet material that provides high strength-to-weight ratio, achieving weight reduction while maintaining sufficient rigidity to minimize vibration and noise interference during operation
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 enhances image quality, reduces noise interference, improves scanning accuracy, and achieves size reduction while maintaining stability and reliability, addressing the limitations of prior art in original readers.
Implementation Method 1
leaf springs to attenuate vibrations
Implementation Method 2
leaf springs to attenuate vibrations, improving rigidity and accuracy
Implementation Method 3
a contracting optical system having a lens and a mirror
Implementation Method 4
read out original surface data by performing main scanning to linearly scan the original with the line sensor
Implementation Method 5
a contracting optical system having a lens and a mirror... the light path of the contracting optical system is reciprocated a plurality of times on the side closer to the original surface
Data Source
AI summary
A module 1 movable over the original surface 110 of the original reader 100 has a metal sheet frame 4 disposed in the vicinity of its gravitational center and having a substantially channel-like shape. A first and a second optical systems 2 and 3 and a drive source 6 assembled to be integral with a flat part 40 of the metal sheet frame 4. Thus, a reduced-size, improved quality and improved-accuracy original reader to be used for facsimile devices and image scanners is obtained.