Stapler Forming Plate with Sequential Retraction for Quieter Stapling
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Solution Overview
Problem
Existing staplers generate collision sounds when straight staples contact the face plate during the stapling process due to simultaneous retraction of shaping portions from the feeding path.
Innovation Solution
A stapler design with a forming plate that shapes staples into a U-shape, featuring separate first and second shaping portions that sequentially retract from the feeding path, allowing staggered contact of staple ends with the face plate to reduce sound generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If both shaping portions retract simultaneously from the feeding path, then the staple sheet can be fed efficiently, but collision sound is generated at both end portions of the straight staple
Solution Approach 1:
The forming plate is divided into first and second shaping portions that operate independently. The first shaping portion shapes one leg portion of the staple while the second shaping portion shapes the other leg portion. This segmentation allows the shaping portions to retract at different times, preventing simultaneous contact of both staple ends with the face plate and reducing collision sound.
Solution Approach 2:
The shaping portions retract in a sequential, periodic manner rather than simultaneously. The first shaping portion retracts first, allowing its corresponding staple end to contact the face plate. Then the second shaping portion retracts, allowing its corresponding staple end to contact the face plate at a different time. This periodic action disperses the collision sound generation over time.
2Ease of operation
If the staple sheet is pressed by the staple pusher in the direction of the face plate, then the stapling operation is completed, but collision sound is amplified at both end portions
Solution Approach 1:
By segmenting the shaping portions into first and second independent units, the patent enables differential retraction timing. This segmentation allows the staple pusher to press the staple sheet while the shaping portions retract sequentially, preventing simultaneous collision of both staple ends with the face plate and reducing the amplified collision sound effect.
Solution Approach 2:
The sequential retraction of shaping portions creates a periodic action pattern where one shaping portion retracts, allows staple end contact, then the other shaping portion retracts, allows its staple end contact. This periodic timing disperses the collision sound generation during the stapling operation, reducing overall noise while maintaining operation completion.
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
The staggered contact of staple ends with the face plate disperses the timing of sound generation, reducing overall collision noise compared to simultaneous contact.
Implementation Method 1
configured to shape the one leg portion by bending a part of the leading staple by being inserted at the position facing the face plate
Implementation Method 2
configured to shape the other leg portion by bending another part of the leading staple by being inserted at the position facing the face plate
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A stapler includes: a forming plate configured to shape a staple; a face plate provided at a position to be face the staple; and a feeding portion configured to feed a staple sheet. The forming plate includes a first shaping portion that is configured to shape one leg portion of the staple and a second shaping portion that is configured to shape another leg portion thereof. The second shaping portion is configured to retract from a position facing the face plate after the first shaping portion retracts from the position facing the face plate after shaping.