Fixing-Unit Connector Release Mechanism for Image-Forming Apparatus
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Solution Overview
Problem
The existing image forming apparatus requires a force to release the fitting between the body side drawer connector and the unit side drawer connector when the fixing unit is removed, deteriorating the workability during insertion and removal.
Innovation Solution
An image forming apparatus with an interlocking unit, lock member, and connector unit that allows the operation lever to pivot between different positions, separating the lock member and connector movements from the body-side connector's movement, reducing the required force for detachment and improving workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the body side drawer connector and unit side drawer connector are configured to be fitted or separated simultaneously with the insertion and removal of the fixing unit, then the connection structure is simple, but the workability at the time of removing the fixing unit is deteriorated due to requiring a force for releasing the fitting
Solution Approach 1:
The patent divides the connector system into two independent parts: a first connector (body side drawer connector) that remains stationary and a second connector (unit side drawer connector) that moves independently. This segmentation allows the fitting and locking actions to be separated from the insertion/removal motion, enabling easy removal without requiring force to release the fitting. The moving connector can be detached independently while the stationary connector remains in place.
2Reliability
If the connector is designed to maintain firm fitting during insertion, then the connection reliability is improved, but the force required for detachment increases
Solution Approach 1:
The patent employs a dynamic connector design where the second connector (unit side drawer connector) is configured to move relative to the first connector (body side drawer connector). This dynamic mechanism allows the connector to maintain firm engagement during normal operation through positive locking, while enabling easy detachment by simply moving the connector to a released position. The dynamic element provides different states: locked for reliability and unlocked for easy removal, without requiring excessive force in either state.
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3C
AI summary
An image forming apparatus (1, 1001) configured to form an image on a sheet (S) includes an apparatus body (1A, 1001A), a mounting unit (100, 180), a restricting portion (122, 202) configured to move to a restricting position and to an allowing position, a first connector (104, 223), a second connector (15, 185) configured to move between a fitting position and a release position, and an interlocking portion (300, 400) configured to move between a first operation position and a second operation position. The interlocking portion (300, 400) includes an operation portion (121, 201), a pivot shaft (124, 204) configured to pivotably support the restricting portion (122, 202), and a cam (123, 205) pivotably supported by the pivot shaft (124, 204) and configured to move the second connector (15, 185) from the fitting position to the release position.