Sheet Detecting Sensor Positioning Mechanism
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Solution Overview
Problem
The existing sheet conveying devices in image forming apparatuses require cumbersome attachment and detachment processes for the sheet detecting sensor, which complicates the positioning adjustment and maintenance due to fixed attachment methods using screws.
Innovation Solution
A sheet conveying device with a detachable supporting member and positioning member that allows easy attachment and precise positioning of the sheet detecting sensor, eliminating the need for tools and reducing the complexity of replacement and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sheet detecting sensor is fixedly attached by means of fastening member such as a screw, then the sheet detecting sensor can be securely fixed at the normal position, but the attachment or detachment work and the positioning adjustment work become very cumbersome
Solution Approach 1:
The fixing structure is divided into a supporting member with a groove and a positioning member with a protrusion. The positioning member can be easily engaged with or disengaged from the supporting member, allowing simple attachment and detachment of the sheet detecting sensor while maintaining secure fixation when engaged
Solution Approach 2:
The positioning member acts as an intermediary between the supporting member and the sheet detecting sensor. It provides both positioning functionality and easy attachment/detachment capability, mediating between the need for secure fixation and ease of operation
2Reliability
If the sheet detecting sensor is fixedly attached by means of fastening member such as a screw, then the sheet detecting sensor can be securely fixed at the normal position, but the positioning adjustment work becomes very cumbersome
Solution Approach 1:
The positioning function is separated from the fixation function. The groove and protrusion structure provides automatic positioning when the positioning member is engaged, eliminating the need for complex positioning adjustment work while maintaining secure fixation
3Ease of repair
If the sheet detecting sensor is replaced, then the failure can be resolved, but the positional relationship between the resist roller and the sheet detecting sensor must be precisely maintained
Solution Approach 1:
The positioning member is pre-configured with a specific shape that corresponds to the groove in the supporting member. When the positioning member is engaged with the supporting member, it automatically establishes the correct positional relationship between the resist roller and the sheet detecting sensor, eliminating the need for complex positioning adjustments during replacement
Solution Approach 2:
The positioning member has a specific local geometry (protrusion shape) that interfaces with the groove in the supporting member. This localized geometric feature ensures precise positioning while allowing easy replacement of the entire assembly
Data Source
AI summary
A sheet conveying device includes a sheet detecting sensor, a resist roller, a supporting member and a positioning member. The sheet detecting sensor is configured to detect a position of a sheet in a conveying path. The resist roller is configured to control a conveying timing of the sheet, based on a detection result by the sheet detecting sensor. The supporting member is configured to detachably support the sheet detecting sensor. The positioning member is configured to engage with the supporting member to position and fixedly attach the sheet detecting sensor, supported by the supporting member, at a normal position.