Ribbon Drive Mechanism With Adjustable Torque for Multiple Ribbon Sizes
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Solution Overview
Problem
Existing printers are limited to dispensing a single size of ribbon, requiring multiple printers for different sizes, and face challenges in adjusting torque for varying ribbon sizes, leading to inefficient operation.
Innovation Solution
A printer drive mechanism with a drive wheel, connector, spring, and actuator that allows for adjustable torque by changing the normal force between the wheel and connector through axial positions, enabling the dispensing of multiple ribbon sizes using the same motor input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a printer is configured to dispense only one size of ribbon, then the drive characteristics are optimized for that specific size, but multiple printers are required for different ribbon sizes
Solution Approach 1:
The drive mechanism employs a dynamic spring-loaded actuator that can adjust the normal force between the drive wheel and connector. This allows the same printer to adapt its drive characteristics for different ribbon sizes (small, medium, large) by changing the compression distance of the spring, eliminating the need for multiple fixed-configuration printers
Solution Approach 2:
The system changes the physical parameter of normal force applied by the drive mechanism. By adjusting the actuator to different axial positions (first, second, third positions), the spring compression distance changes, thereby changing the normal force parameter to match different ribbon size requirements
2Adaptability or versatility
If rough, inaccurate drive characteristics are used to accommodate different ribbon sizes, then multiple ribbon sizes can be used, but printing accuracy deteriorates
Solution Approach 1:
Rather than using rough, inaccurate drive characteristics, the invention precisely changes the normal force parameter through controlled spring compression. Each actuator position (first, second, third) corresponds to a specific compression distance optimized for small, medium, or large ribbons respectively, ensuring accurate printing across all sizes
3Force
If the normal force between the connector and drive wheel is increased, then the torque transmission is improved for larger ribbons, but the complexity of adjusting for different sizes increases
Solution Approach 1:
The system uses a dynamic spring-loaded actuator that automatically provides the appropriate normal force based on its compression distance. The spring mechanism itself handles the force adjustment, eliminating the need for complex external adjustment mechanisms while still providing optimized torque transmission for different ribbon sizes
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 versatile operation with multiple ribbon sizes by applying appropriate torque without motor adjustments, reducing the need for multiple printers and enhancing operational efficiency.
Implementation Method 1
a spring configured to control a normal force applied directly or indirectly between the connector and the drive wheel along the axis of rotation
Data Source
AI summary
Methods, apparatuses, systems, computing devices, and/or the like are provided. An example method may include a printer assembly. An example printer assembly may include a printer ribbon drive mechanism. An example printer drive mechanism may include a drive wheel, a connector, a spring, and an actuator. An example actuator may be configured to translate from a first axial position to a second axial position. An example spring may be configured to apply a greater force when an actuator is disposed in the first axial position than when the actuator is disposed in the second axial position. The example method may also include a motor to apply a torque to a drive wheel.