Image Sensor Skew Adjustment Mechanism for Scanner Alignment
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Solution Overview
Problem
Existing scanning devices suffer from skew deviations in image sensors due to manufacturing and assembly tolerances, leading to increased maintenance time, component costs, and contamination risks during adjustment.
Innovation Solution
A skew adjustment mechanism comprising a frame rack, image sensor, support frame, and bearing base, with elastic elements, friction parts, and a penetrating element that allows adjustable skew correction without disassembly, using a guide slot and reference notches for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If clearance is maintained between bearings and guide rods to minimize resistance, then smooth sliding is ensured, but skew deviation of the contact image sensor occurs
Solution Approach 1:
The patent introduces a dynamic adjustment mechanism that allows the skew angle of the image sensor to be adjusted after assembly. The support frame can rotate relative to the bearing base, and the penetration element can be repositioned within the guide slot to change the skew angle, enabling the system to adapt to skew deviations caused by clearance while maintaining smooth sliding operation.
2Manufacturing precision
If the upper cover is disassembled and components are replaced to reduce skew deviation, then manufacturing precision is improved, but maintenance time increases and contamination risk rises
Solution Approach 1:
The patent creates a dynamically adjustable skew angle mechanism where the penetration element can be repositioned along the guide slot without disassembling the upper cover. This allows maintenance personnel to correct skew deviation by simply adjusting the penetration element's position and relocking it, reducing maintenance time from hours to minutes while keeping the system sealed.
Solution Approach 2:
The adjustment mechanism is designed to be self-serviceable through a simple operation: loosening the locking nut, moving the penetration element to the correct position indicated by reference notches, and retightening the nut. This eliminates the need for complex disassembly and specialized tools, enabling quick field adjustments without increasing contamination risk.
3Manufacturing precision
If the upper cover is disassembled for skew adjustment, then skew deviation is corrected, but contamination of components occurs
Solution Approach 1:
The adjustment mechanism allows skew correction to be performed in-place through a simple nut-loosening and element-repositioning operation, eliminating the need to disassemble the upper cover. The sealed enclosure remains intact throughout the adjustment process, preventing dust and contaminants from entering the contact image sensor while enabling skew deviation correction.
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
Enables timely and effective skew correction in scanning devices, reducing maintenance time and preventing contamination, while ensuring accurate image scanning without frequent component replacement.
Implementation Method 1
The image sensing module is designed to incorporate a supporting frame, providing a necessary elastic force to keep the contact image sensor in close contact with a scanning window glass
Implementation Method 2
The image sensor includes a plurality of friction parts respectively positioned on two sides of the image sensor
Data Source
AI summary
A skew adjustment mechanism for a scanning device includes a frame rack, an image sensor, a support frame, and a bearing base. The frame rack includes elastic elements on its bottom side and a guide slot positioned on its inner side edge. The image sensor, disposed on the frame rack, includes friction parts on two sides. The elastic elements abut against the two sides of the image sensor. The support frame, positioned below the frame rack, includes a fixing plane with a through hole for accommodating a penetrating element. The bearing base, cooperating with a guide rod to slide, supports the support frame and the frame rack. The penetrating element extends through the through hole into the guide slot and is fixed inside the frame rack. A skew angle of the image sensor is adjustable by changing a position of the penetrating element within the guide slot.