Stapler Guide Surface Elastic Adjustment
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Solution Overview
Problem
Existing staplers face issues with secure attachment of the staple cassette to the frame, leading to inconsistent spacing between guide surfaces, which can cause the driver to lose grip on the staple crown, resulting in inadequate stapling due to manufacturing tolerances.
Innovation Solution
The guide surfaces are made movable relative to each other using elastic elements, such as helical springs, to maintain a consistent distance, ensuring proper alignment and grip during stapling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If releasable fasteners are used to attach the staple cassette to the frame, then the cassette can be exchanged easily, but manufacturing tolerances cause the distance between guide surfaces to exceed the permitted spacing, leading to driver loss of grip and stapling failure
Solution Approach 1:
The second guide surface is made movable relative to the first guide surface through an elastic element (helical spring), allowing the distance between guide surfaces to dynamically adjust and compensate for manufacturing tolerances in the releasable fasteners, while maintaining secure attachment and consistent stapling performance
Solution Approach 2:
The elastic element changes the physical state of the second guide surface from fixed to movable, enabling automatic adjustment of the distance parameter between guide surfaces to match the permitted spacing determined by the outlet channel geometry
2Device complexity
If the outlet channel clearance is not visible during assembly, then the stapler structure remains compact, but the fault cannot be observed and corrected before stapling, requiring post-assembly clearance checks
Solution Approach 1:
The elastic element enables the outlet channel clearance to self-adjust automatically when the staple cassette is attached to the frame, eliminating the need for manual observation or measurement of the clearance during assembly, and ensuring correct spacing without additional inspection steps
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures consistent stapling performance by maintaining the correct clearance between guide surfaces, preventing the driver from losing grip on the staple crown, even with varying manufacturing tolerances, thus ensuring reliable stapling.
Implementation Method 1
the guide surfaces are movable toward and away from each other relative to each other and that they are pressed toward each other using one or more elastic elements
Implementation Method 2
the incorporated elastic means consist of helical springs
Data Source
AI summary
A stapler for stapling together a workpiece, primarily a sheaf of papers, in which the stapler comprises a stapling unit and an anvil, which interacts with the stapling unit and on which the workpiece is placed, and against which stapling is performed, which stapling unit and an anvil are, driven relative to each other in a reciprocating stapling movement, during which movement stapling takes place, the stapling unit comprises a frame and a staple cassette which houses staple blanks and which is exchangeable, and which is detachably connected to the frame by attachment devices, and the staple blanks are fed one by one to an outlet channel by a feeding device incorporated in the stapler.