Sheet Feeding Separation Pad with Recessed Base End
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Solution Overview
Problem
Existing sheet feeding devices in image scanners often cause sheet damage and multiple sheets to be fed at once due to exposed holes in the separation pad, leading to misalignment and improper sheet handling.
Innovation Solution
A sheet feeding device with a separation unit comprising a separation pad, holder, and supporting member, where the separation pad has a receded base end and the supporting member attaches to the holder, preventing sheet damage by reducing the likelihood of sheets being caught in holes and ensuring single-sheet feeding through the use of a receded portion and holding mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If film is disposed between the separation pad and the clip to cover the hole, then sheet damage is prevented, but sheets may slip under the film causing feeding of plural sheets at one time
Solution Approach 1:
The invention extracts and removes the harmful hole structure from the separation pad. Instead of covering the hole with film (which causes sheets to slip), the patent eliminates the hole by using a solid separation pad without through-holes, thereby preventing both sheet damage and multiple-sheet feeding while maintaining reliable single-sheet separation
Solution Approach 2:
The invention segments the separation pad structure into a solid body without through-holes, separating the functional surfaces while eliminating the problematic hole that caused sheets to be caught. The separation pad is designed with a solid construction that maintains separation functionality without requiring film coverage
2Ease of operation
If the distance between the base end of the separation pad and the peripheral surface of the roller is relatively large, then sheet feeding is facilitated, but feeding of plural sheets at one time is likely to occur
Solution Approach 1:
The invention optimizes the distance parameter between the base end of the separation pad and the peripheral surface of the roller. By carefully controlling and adjusting this distance to an optimal value, the patent achieves both easy sheet feeding and reliable single-sheet separation, preventing multiple sheets from entering the feeding space
Data Source
AI summary
A separation unit includes a separation pad configured to separate sheets one by one by making the sheets contact with a nip portion of the separation pad, a holder configured to hold the separation pad, and a supporting member configured to keep a base end of the separation pad to the holder. The separation pad includes a supported portion receded in the base end of the separation pad. The supporting member includes an attaching portion configured to attach the supporting member to the holder and a holding portion configured to fit in the supported portion to hold the supported portion in cooperation with the holder.