Exposure Unit Grounding via Coil Spring for Static Dissipation
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Solution Overview
Problem
Existing image forming apparatuses face challenges in safely grounding the exposure unit during its movement between opposing and retracted positions, which can lead to electrical hazards and noise issues due to static electricity and antenna effects.
Innovation Solution
Incorporating a grounding member with a coil spring and metal plate members that guide the exposure unit's movement, ensuring it is grounded when transitioning from the opposing to the retracted position, thereby preventing electrical hazards and reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the exposure unit is allowed to move freely between opposing and retracted positions, then operational flexibility is improved, but electrical hazards and noise issues occur due to static electricity and antenna effects
Solution Approach 1:
The grounding member is positioned in advance along the movement path of the exposure unit. Before the exposure unit reaches the retracted position, the grounding member already establishes electrical contact through the coil spring and metal plate structure, ensuring continuous grounding during the entire movement transition and preventing static electricity accumulation.
Solution Approach 2:
The grounding member acts as an intermediary element between the exposure unit and the grounded state. The coil spring and metal plate structure serve as intermediate components that facilitate controlled electrical contact during movement, mediating the transition between operational positions while maintaining electrical safety and reducing noise through continuous grounding.
2Reliability
If the exposure unit is grounded during movement, then electrical safety is improved, but device complexity increases due to additional grounding components
Solution Approach 1:
The grounding member serves multiple functions simultaneously: it provides electrical grounding during movement, guides the exposure unit through its travel path, and reduces noise through continuous electrical contact. The coil spring and metal plate structure are designed to perform grounding, positioning, and noise reduction functions in a single integrated component, avoiding the need for separate grounding mechanisms.
Solution Approach 2:
The grounding member automatically engages with the exposure unit during its movement without requiring external control or additional actuators. As the exposure unit moves between positions, the grounding member self-activates through the coil spring contact mechanism, providing continuous grounding service throughout the movement process without increasing operational complexity.
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 effectively grounds the exposure unit during its movement, reducing the risk of electrical hazards and noise interference, enhancing safety and operational stability.
Implementation Method 1
a grounding member that grounds the exposure member at least when the exposure member is moving from the opposing position to the retracted position
Implementation Method 2
grounding the exposure unit during its movement, reducing the risk of electrical hazards and noise interference
Implementation Method 3
the grounding member includes a coil spring and metal plate members that guide the exposure unit's movement
Data Source
AI summary
An image forming apparatus includes an opening-closing member, which rotates to open or close an opening, an image carrier, an exposure member, a developing member, and a grounding member. The exposure member moves in response to a movement of the opening-closing member so as to be at an opposing position, at which the exposure member opposes the image carrier, when the opening-closing member is at a closed position and at a retracted position, at which the exposure member is retracted away from the image carrier, when the opening-closing member is at an open position. The exposure member forms an electrostatic latent image on the image carrier while the exposure member is at the opposing position. The developing member develops the electrostatic latent image. The grounding member grounds the exposure member at least when the exposure member is moving from the opposing position to the retracted position.