Compact Drive System for Printers Using Nested Slider Rod
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Solution Overview
Problem
Existing media interaction systems, such as printers and scanners, face performance reduction and increased size due to drive systems used to move media interaction devices across mediums.
Innovation Solution
A compact drive system design that includes a housing, supports, slider rod, carrier, power train, motor, encoder, and controller, where the slider rod is reduced in diameter through strategic support and nesting configurations, allowing for reduced dimensions while maintaining performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a drive system is used to move the media interaction device across the medium, then the media interaction device can be positioned and moved, but the system size increases and performance is reduced
Solution Approach 1:
The patent applies nesting by placing the power train components (motor, gears, belts) inside the housing structure, and positioning the carrier and media interaction device within the compact arrangement. The slider rod is supported at multiple points within the housing, creating a nested configuration where components are arranged concentrically and in layers to minimize overall footprint while maintaining full functionality.
Solution Approach 2:
The patent transitions from a traditional horizontal drive system layout to a vertical arrangement where the slider rod extends vertically within the housing, with the media interaction device moving along the vertical axis. This dimensional reorientation allows the drive system to achieve compact horizontal footprint while maintaining adequate stroke length and operational capability.
2Ease of operation
If a drive system is used to move the media interaction device across the medium, then the media interaction device can be positioned and moved, but the performance of the system is reduced
Solution Approach 1:
The patent employs dynamic balancing by positioning the carrier and media interaction device such that their combined center of gravity aligns with the axis of the slider rod. This dynamic alignment minimizes lateral forces and moments during movement, reducing wear on the support points and enabling smoother, more accurate positioning. The power train is also configured to provide balanced drive forces that maintain optimal performance throughout the stroke cycle.
Solution Approach 2:
The patent incorporates an encoder that provides feedback on the position of the media interaction device along the slider rod. This feedback enables the controller to precisely control the drive system, compensate for any deviations, and maintain high positioning accuracy. The encoder feedback loop ensures that performance is optimized by continuously adjusting drive commands based on actual position measurements.
3Volume of stationary object
If the slider rod diameter is reduced to make the system compact, then the system dimensions are reduced, but the structural strength may be compromised
Solution Approach 1:
The patent counteracts the reduced structural capacity of the thinner slider rod by strategically positioning support points along its length. These support points, located at specific intervals including near the ends and at intermediate positions, provide counterbalancing mechanical support that compensates for the lower moment of inertia of the reduced-diameter rod. This allows the rod to maintain sufficient stiffness and strength despite the diameter reduction.
Solution Approach 2:
The patent applies local quality by providing enhanced support specifically at critical locations along the slider rod where bending moments and shear forces are highest. The support points are positioned to match the load distribution pattern, providing localized reinforcement exactly where needed rather than uniformly increasing the rod diameter throughout. This allows the rod to be thin where stresses are low and adequately supported where stresses concentrate.
Data Source
AI summary
Various methods and apparatus relating to a media interaction device drive system having at least one reduced dimension are disclosed.