Stapling Device Control Cam for Reduced Noise and Complexity
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Solution Overview
Problem
Existing stapling devices for producing staple wire staples, particularly ring-eyelet staples, are expensive, prone to failure, and noisy due to complex structures with multiple moving parts and specific curve surfaces.
Innovation Solution
A simplified stapling device design featuring a control element, such as a control bolt guided along a control cam, which reduces the number of moving parts and eliminates the need for a support lever and specific curve surfaces, enhancing ease of operation, reducing noise, and lowering costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a support lever with roller and spring is used to guide the former during upward movement, then the former is supported in upward movement, but the device becomes expensive, complex and noisy
Solution Approach 1:
The invention extracts and removes the support lever, roller, and spring components from the device. Instead of using these separate supporting components, the control cam integrates the support function directly into the control mechanism, eliminating the need for the support lever assembly and reducing overall device complexity.
Solution Approach 2:
The invention merges the support function with the control cam mechanism. The control cam combines both the control function (guiding wire clamping lever) and the support function (guiding former during upward movement) into a single integrated component, reducing the number of parts and simplifying the device structure.
2Ease of operation
If multiple moving parts and curve surfaces are used to guide the former, then the former movement is controlled, but the device becomes noisy and prone to failure
Solution Approach 1:
The invention removes the curve surfaces and associated moving parts from the device. The control cam uses controlled linear movement with angled surfaces instead of curved surfaces, eliminating the noisy rolling and sliding actions of the roller on curve surfaces while maintaining effective control of the former during upward movement.
3Reliability
If a support lever with roller is used, then the former is supported during upward movement, but the device requires more space and has more moving parts
Solution Approach 1:
The invention merges the support function into the control cam mechanism, which is already present in the device. The control cam serves dual purposes: controlling the wire clamping lever and supporting the former during upward movement. This integration eliminates the need for separate support lever, roller, and spring components, reducing the number of moving parts.
Solution Approach 2:
The control cam is designed to perform multiple functions: it controls the wire clamping lever during downward movement and simultaneously supports the former during upward movement. This multi-functionality reduces the need for dedicated support components and simplifies the overall device structure.
4Ease of operation
If curve surfaces and support lever are used, then the former is guided during upward movement, but the assembly becomes more expensive
Solution Approach 1:
The invention extracts and eliminates the curve surfaces from the design. The control cam uses simple angled linear surfaces instead of complex curved surfaces, which are easier and less expensive to manufacture. The control cam can be produced as a single molded or machined part without the need for complex curvature machining or assembly of multiple components.
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 solution results in a more reliable, quieter, and cost-effective stapling device with fewer moving parts, improved assembly efficiency, and reduced noise, while maintaining functionality for producing ring-eyelet staples and other types of staples.
Implementation Method 1
the former being biased against the control block by a compression spring
Implementation Method 2
the control element is a control bolt which is advantageously guided along a control cam, consisting of several control cam sections, which is formed in a control block
Data Source
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AI summary
The device comprises a punch (80) driving the staple into the stack of paper and a device (60) for pressing the wire sections into the appropriate shape. The shaping device (60) is laterally moved when the punch (80) moves downward. A wire clamping lever (63) is swivel mounted to the shaping device (60) and provided with a cam (65) guided along a specifically curved surface (72,73,74,75) in order to facilitate an upward motion of the punch (80) parallel to the downward motion of the shaping device (60) avoiding a collision of the components.