Arm Rotating Device Coil Spring Biasing for Vibration Suppression
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Solution Overview
Problem
Conventional arm rotating devices for image forming apparatuses face issues with decreased load on the support post due to increased arm size, leading to vibration and interference with pressing operations, as the elastic force of coil springs is not consistently maintained, especially with larger displays and varying precision components.
Innovation Solution
An arm rotating device with a support post, arm, and coil springs, where a holding portion is used to maintain increased elastic force on at least one end of the coil spring wound around the support post, ensuring constant biasing and precise pressing operations by allowing the coil springs to apply consistent rotational load despite variations in precision and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the arm size is increased to support larger displays, then the display size and recording medium capacity are improved, but the pressing operation generates vibration and the load to the support post decreases
Solution Approach 1:
The holding portion applies a preliminary biasing force to the coil spring in the direction that increases elastic force, creating a pre-compression state that counteracts the destabilizing effects of larger arm size before operation begins. This preliminary action prevents vibration and maintains pressing operation effectiveness despite the increased arm dimensions.
Solution Approach 2:
The invention changes the elastic force parameter of the coil spring by using the holding portion to maintain increased elastic force. This parameter adjustment ensures that the coil spring provides sufficient restoring force and load to the support post even when the arm size is increased, thereby suppressing vibration and maintaining operational stability.
2Stability of the object's composition
If the winding force of the coil spring is increased to suppress vibration, then the load to the support post is improved, but scraping occurs on the support post and coil spring surfaces
Solution Approach 1:
The holding portion applies the biasing force locally to the end of the coil spring rather than increasing the winding force throughout the entire spring. This localized application of force increases elastic force where needed while avoiding excessive friction and scraping between the coil spring and support post surfaces, thereby maintaining both vibration suppression and component durability.
3Measurement precision
If the winding force of the coil spring is made too large to ensure load, then the pressing operation precision is improved, but the load decreases due to precision errors and assembly variations
Solution Approach 1:
The holding portion dynamically maintains increased elastic force in the coil spring through a biasing mechanism that compensates for precision errors and assembly variations. This dynamic adjustment ensures consistent load to the support post and reliable pressing operation precision without requiring excessively large winding forces that would be sensitive to manufacturing tolerances.
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
The solution maintains a consistent rotational load on the support post, reducing vibration and ensuring precise operation of the display and other mounted devices, even with larger displays and varying precision components, by utilizing a holding portion to enhance the elastic force of the coil springs.
Implementation Method 1
a coil spring which is wound around a peripheral surface of the support post; a holding portion which holds at least one end of the coil spring in a movable manner while biasing the one end of the coil spring in a direction in which the elastic force of the coil spring is increased
Data Source
AI summary
The elastic force of a spring 41 in a direction of an arrow X is applied to an end 51A of a coil spring 5A in a direction of an arrow Y through a holding plate 42. The end 52A of the coil spring 5A is engaged with a holding hole 12 and regulated from moving in the direction of the arrow Y. The elastic force of the spring 41 in the direction of the arrow X is constantly applied to the coil spring 5A in a direction in which the peripheral surface of the support post 3 is tightened.