Staple Gun Adjustable Breakpoint Pin Tensioning
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Solution Overview
Problem
Existing staple guns struggle to vary impact force effectively across a wide range, leading to either deformation of workpieces requiring low force or inadequate staple driving in workpieces needing high force, due to fixed tensioning methods that do not accommodate varying material requirements.
Innovation Solution
The staple gun employs a first breakpoint pin placed at a distance ratio of 1.6-2.0:1 from the bearing pin and a second breakpoint pin at a distance ratio of 3.1-3.7:1 from the bearing pin, allowing adjustable tensioning by positioning the second pin to contact the elastic member at different heights of the driver's upward movement, enabling variable impact force adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the elastic member is made thick and strongly tensioned to produce great force, then the staple driving force is improved, but the workpiece becomes deformed by impact marks
Solution Approach 1:
The patent introduces a movable second breakpoint pin that can be positioned at different distances from the bearing pin, allowing the tensioning point of the elastic member to be dynamically adjusted. This enables the impact force to be varied according to the specific workpiece requirements, preventing both excessive force that causes deformation and insufficient force that fails to drive the staple properly.
Solution Approach 2:
The patent changes the parameter of breakpoint pin position to control the tensioning force of the elastic member. By adjusting the distance of the second breakpoint pin from the bearing pin, the impact force is precisely controlled, allowing optimization for different workpiece materials and thicknesses while avoiding aesthetic damage.
2Object-affected harmful factors
If the elastic member is made thin and weakly tensioned to avoid deformation, then the workpiece aesthetic is preserved, but the staple is not driven sufficiently into the workpiece
Solution Approach 1:
The movable second breakpoint pin allows dynamic adjustment of the elastic member's tensioning point. When positioned to engage with the elastic member at a specific location during the driver's upward movement, it creates the necessary impact force for adequate staple driving without causing workpiece deformation.
Solution Approach 2:
By changing the position parameter of the second breakpoint pin, the tensioning force of the elastic member is precisely controlled. This enables sufficient impact force for staple driving while avoiding excessive force that would deform the workpiece, thus resolving the contradiction between force adequacy and aesthetic preservation.
3Device complexity
If a fixed tensioning method is used for the elastic member, then the device complexity is reduced, but the adaptability to varying material requirements is limited
Solution Approach 1:
The patent employs a simple dynamic mechanism where the second breakpoint pin can be moved to different positions along the frame. This allows the tensioning point of the elastic member to be adjusted according to material requirements, providing adaptability across different workpiece types while maintaining relatively simple device complexity.
Solution Approach 2:
The tensioning mechanism is segmented into two breakpoint pins with different functions: the first breakpoint pin provides a fixed reference point, while the second breakpoint pin can be positioned at different locations to adjust the elastic member's tensioning point. This segmentation enables adaptability to varying impact force requirements without creating an overly complex system.
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 configuration allows for a wide range of impact force variation, preventing deformation in low-force applications and ensuring adequate staple driving in high-force scenarios, thus enhancing the staple gun's versatility and aesthetic appeal.
Implementation Method 1
an elongated elastic member, which is tensioned when the driver is conveyed in the upward movement
Data Source
AI summary
Staple gun for driving staples into a workpiece includes a frame with a driver conveyable upward and downward. In the downward movement, the driver executes a drive stroke driving the staple. In the upward movement, an activation member conveys the driver to a highest height and releases the driver to execute the drive stroke. An elongated elastic member has a first end coupled to the driver and a second end to a bearing pin assigned to the frame. A first breakpoint pin is placed between the bearing pin and the driver at a first distance from the bearing pin, and a second breakpoint pin between the driver and the first breakpoint pin is arranged at a second distance from the bearing pin and is movable between first and second positions disengaging and engaging the elastic member, respectively. The first distance is related to the highest height as 1.6-2.0:1.