Stapler Clincher Mechanism Two-Stage Bending
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Solution Overview
Problem
Conventional staplers often experience poor binding due to inadequate bending of staple legs, leading to issues like buckling, reverse bending, or lifting, and this can result in an increased height of the clincher mechanism and the stapler itself.
Innovation Solution
A stapler design featuring a clincher portion with a pair of clinchers that perform two operations: first, they move along the surface direction of the paper to approach each other, and second, they move closer to the paper to bend the staple legs effectively, allowing for a stabilized bent shape while maintaining a lower height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pivot fulcrums of the clinchers are spaced from the sheets of paper to properly bend the staple legs, then the binding quality is improved, but the height of the clincher mechanism and the entire stapler is increased
Solution Approach 1:
The bending operation is divided into two distinct phases: a first operation where the clinchers move along the paper surface to approach each other, and a second operation where the clinchers move to approach the paper. This segmentation allows the pivot fulcrums to be positioned close to the paper while still achieving proper bending through the coordinated two-stage motion.
Solution Approach 2:
The clincher mechanism employs dynamic motion where the clinchers perform sequential operations rather than a single static bending action. The first operation positions the clinchers along the paper surface, and the second operation brings them into contact with the paper for bending, allowing the pivot fulcrums to maintain a low position while achieving the necessary bending effect through dynamic movement.
2Reliability
If the pivot fulcrums are positioned near the middle of the stapler in width direction to inhibit poor binding, then the staple legs are properly bent, but the height of the clincher mechanism is increased
Solution Approach 1:
The bending process is segmented into two operations: first, the clinchers move along the paper surface direction to approach each other, establishing proper positioning; second, the clinchers move to approach the paper for the actual bending. This segmentation enables the pivot fulcrums to be positioned at a height that does not increase the overall mechanism height while still achieving stable bending through the two-stage process.
3Device complexity
If a single clinching operation is used, then the device complexity is reduced, but poor binding occurs due to inadequate bending of staple legs
Solution Approach 1:
The bending function is divided into two sequential operations performed by the pair of clinchers: the first operation moves the clinchers along the paper surface to approach each other, and the second operation moves them to approach the paper for bending. This segmentation of a single complex function into two simpler sequential operations achieves reliable bending without requiring a significantly more complex mechanism.
Solution Approach 2:
The first operation serves as a preliminary action where the clinchers move along the paper surface to approach each other before the actual bending occurs in the second operation. This preliminary positioning ensures that the clinchers are correctly aligned and positioned, enabling the subsequent bending action to be effective and preventing poor binding outcomes.
Data Source
AI summary
A stapler includes a staple striking portion configured to strike a staple to penetrate sheets of paper and a clincher portion configured to bend staple legs of the staple penetrating the sheets of paper. The clincher portion includes a pair of clinchers. The pair of clinchers are configured to perform a first operation and a second operation. In the first operation, the pair of the clinchers move along a surface direction of the sheets of paper to approach each other. In the second operation, the pair of clinchers move to approach the sheets of paper after the first operation.