Heating Roller Power Feeder with Rolling Bodies
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Solution Overview
Problem
Existing heating devices face instability in power feeding to resistance heating layers of rotating heating rollers, particularly when power is fed via a contact member at a predetermined position, leading to inconsistent heating performance.
Innovation Solution
A heating device with a connection power feeder that includes an annular frame concentric with the heating roller, a power feed shaft, rolling bodies for conductive contact, and a non-conductive cover, allowing for stable power feeding to the resistance heating layer without continuous contact with the roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If power is fed via a contact member at a predetermined position on the rotating heating roller, then the structure is simple, but the power feeding stability deteriorates
Solution Approach 1:
The invention applies the dynamics principle by introducing rolling bodies that convert the sliding contact between the stationary power feed member and the rotating heating roller into rolling motion. The rolling bodies rotate as the heating roller turns, maintaining continuous conductive contact while accommodating the rotational movement. This dynamic adaptation resolves the contradiction by enabling stable power feeding through rolling contact rather than static sliding contact, thus improving reliability without significantly increasing structural complexity.
2Device complexity
If a stationary power feed member contacts the rotating heating roller, then the structure is simple, but contact stability deteriorates due to rotation
Solution Approach 1:
The invention applies the intermediary principle by introducing rolling bodies as a mediator between the stationary power feed member and the rotating heating roller. These rolling bodies serve as an intermediate element that maintains conductive contact while adapting to the rotational movement of the heating roller. The rolling bodies rotate on their axes as they move along the heating roller surface, providing stable electrical connection without requiring the power feed member itself to rotate or slide, thus resolving the contact stability issue.
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
Ensures stable power feeding to the resistance heating layer, enhancing the reliability and consistency of the heating process, particularly in applications like image forming apparatuses, where precise temperature control is crucial.
Implementation Method 1
a resistance heating layer (533) formed on the outer peripheral surface of the heating roller (53), power is stably fed to the resistance heating layer (533) without rubbing on the heating roller (53) at a predetermined position
Implementation Method 2
a plurality of rolling bodies (73) that roll while being in conductive contact with an inner peripheral surface of the frame (71) and an outer peripheral surface of the power feed shaft (72)
Data Source
AI summary
A heating device includes a heating roller that includes a resistance heating layer, and a connection power feeder that is mounted on an end portion of the heating roller, is connected to the resistance heating layer, and feeds power to the resistance heating layer, in which the connection power feeder includes an annular frame that is disposed to be concentric with the heating roller and is conductively connected to the resistance heating layer, a power feed shaft of which a portion is disposed in the frame and which feeds power, plural rolling bodies that roll while being in conductive contact with an inner peripheral surface of the frame and an outer peripheral surface of the power feed shaft, and a non-conductive cover that holds and covers the frame and the rolling bodies in a state where a portion excluding the portion of the power feed shaft is exposed, and the connection power feeder excluding the power feed shaft is mounted on the heating roller so as to be integrally rotated with the heating roller.