Electric Stapler Clamping Control for Sheet Alignment
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Solution Overview
Problem
Existing electric staplers fail to align end faces of sheets properly and result in bent corners and thick staple portions, leading to misalignment and inefficient storage when binding multiple sheets.
Innovation Solution
An electric stapler with a binding unit that performs clamping, penetration, and clinching processes, controlled by a motor and control unit, which executes multiple clamping and clinching cycles to correct sheet curl and reduce staple thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sheets are bound without correcting curl, then binding processing is faster, but end faces become misaligned and corner portions bend
Solution Approach 1:
The binding unit performs a preliminary clamping action before the penetration process to correct sheet curl. The clamping unit applies pressure to flatten the sheets, ensuring they are properly aligned and free of curls before the staple penetrates, thus preventing misalignment and corner bending in the final bound product
2Strength
If staple portion is thick, then binding strength is sufficient, but storage and accommodation spaces are increased and stable stacking cannot be made
Solution Approach 1:
The clinching unit applies controlled pressure to bend the leg portions of the staple inward, changing the geometric parameters of the staple structure. This creates a compact, flat profile that reduces the thickness of the bound portion while maintaining adequate binding strength through the mechanical interlocking of the bent legs
Data Source
AI summary
An electric stapler includes a binding unit configured to perform binding processing on a sheet bundle by sequentially executing a clamping process of clamping the sheet bundle, a penetration process of penetrating a staple through the clamped sheet bundle, and a clinching process of pressing leg portions of the staple penetrating through the sheet bundle, a motor configured to drive the binding unit, and a controller configured to control the motor. The controller is configured to control the motor to execute the clamping on the sheet bundle or the pressing on the leg portions multiple times in the clamping process.