Conductive Handle for Static Discharge in Image Formers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Image forming apparatuses face issues with electrostatic discharges during maintenance, which can lead to erroneous operations or component failures due to the existing grounding methods that do not effectively remove static electricity without shocking the user.
Innovation Solution
The image forming apparatus incorporates a conductive handle with a pivot shaft, grip portion, and contact portion, where the contact portion is initially separated from the housing by a distance to prevent discharge, and contacts the housing only when opening, ensuring a stable conductive state for static electricity removal without shocking the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the handle is grounded via the housing to remove static electricity, then static electricity is removed, but the user may be shocked by electrostatic discharge
Solution Approach 1:
The handle is pre-charged to the same potential as the user before contact. When the user touches the handle, no potential difference exists, preventing electrostatic discharge and shock. This preliminary potential equalization eliminates the harmful effect while maintaining the beneficial static electricity removal function.
Solution Approach 2:
The handle and user are maintained at the same electric potential through the grounding mechanism. By ensuring equipotential conditions between the handle and user, the system prevents electrostatic discharge while still allowing static electricity to be safely discharged to ground through the housing.
2Reliability
If the handle is always in contact with the housing, then static electricity is continuously removed, but the handle may cause erroneous operation or component failure when closed
Solution Approach 1:
The contact state between the handle and housing changes dynamically based on cover position. When the cover is open, the handle contacts the housing for static electricity removal. When the cover is closed, the handle is separated from the housing to prevent discharge to internal components. This dynamic adjustment resolves the contradiction between continuous grounding and component protection.
Solution Approach 2:
The housing acts as an intermediary between the handle and internal components. The handle discharges static electricity to the housing (which is at ground potential), and the housing provides a safe discharge path that prevents direct contact with sensitive internal components, thus protecting them from electrostatic damage.
3Object-generated harmful factors
If the handle is separated from the housing when closed, then component failure is prevented, but static electricity is not removed when the user touches the handle
Solution Approach 1:
The handle's contact state with the housing is dynamically controlled based on cover position. When the cover is open, the handle contacts the housing to remove static electricity. When the cover is closed, the handle separates from the housing to protect internal components. This dynamic behavior ensures both static electricity removal and component protection at appropriate times.
4Reliability
If the handle contacts the housing during opening, then static electricity is removed without shocking the user, but the structure becomes more complex
Solution Approach 1:
The handle automatically contacts the housing during the opening motion through its own movement, without requiring external control mechanisms. The user's natural action of opening the cover causes the handle to sweep past and contact the housing, enabling automatic static electricity removal. This self-service approach minimizes additional complexity while achieving the safety function.
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
This design effectively removes static electricity from the user during maintenance, reducing the risk of electrostatic discharges that could cause operational errors or component failures in the image forming apparatus.
Implementation Method 1
an electrostatic discharge may be generated when the user touches the inside of the image forming apparatus
Implementation Method 2
the handle contacts or comes close to the housing so as to be separated therefrom by a distance equal to or smaller than the particular distance
Data Source
AI summary
An image forming apparatus includes an image forming portion, a housing, and a cover member. The image forming portion is configured to form an image. The housing supports the image forming portion and has conductivity. The cover member includes a handle having conductivity and is opened when maintenance of the image forming portion is carried out. In the image forming apparatus, when the cover member is in a closed state, the handle is separated from the housing by a distance larger than a predetermined particular distance, and during a process of the cover member being opened and transitioning from the closed state to an open state, the handle contacts or comes close to the housing so as to be separated from it by a distance equal to or smaller than the particular distance.