Stapler Driving Structure for Effort-Saving Staple Striking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional staplers face challenges in providing an effort-saving operation while ensuring positive staple striking, and lack a safety mechanism to prevent false triggering.
Innovation Solution
A stapler design featuring a unique shaft configuration with a first distance smaller than a second distance, a longer staple driving stroke, and a safety mechanism to prevent re-triggering, utilizing a torsion spring and plate springs for efficient staple driving and adjustable staple striking force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the elastic force of the plate spring is increased to ensure firm staple striking, then the staple striking force is improved, but the downward pressing force required by the user increases, making operation less effort-saving
Solution Approach 1:
The patent makes the load arm length adjustable through a movable stop member that can be positioned at different locations on the operation lever. By changing the load arm length dynamically, the system can optimize the balance between staple striking force and downward pressing force according to different usage requirements, resolving the contradiction between these two parameters.
Solution Approach 2:
The patent changes the parameter of load arm length to adjust the force transmission characteristics. By providing multiple selectable load arm lengths, the system can modify the mechanical advantage ratio, allowing users to choose between higher staple striking force or lower downward pressing force based on their specific needs.
2Ease of operation
If the elastic force of the plate spring is decreased to reduce downward pressing force, then operation becomes more effort-saving, but the staple striking force becomes insufficient, resulting in poor staple striking effect
Solution Approach 1:
The patent makes the load arm length adjustable through a movable stop member that can be positioned at different locations on the operation lever. By changing the load arm length dynamically, the system can optimize the balance between staple striking force and downward pressing force according to different usage requirements, resolving the contradiction between these two parameters.
Solution Approach 2:
The patent changes the parameter of load arm length to adjust the force transmission characteristics. By providing multiple selectable load arm lengths, the system can modify the mechanical advantage ratio, allowing users to choose between higher staple striking force or lower downward pressing force based on their specific needs.
3Force
If the distance between the first and third coupling shafts is increased to provide specific force applying mode, then the force transmission is improved, but the effort-saving effect is limited
Solution Approach 1:
The patent makes the load arm length adjustable, allowing the system to optimize the force transmission path. By adjusting the stop member position, the effective lever arm changes, which modifies the mechanical advantage and improves the effort-saving effect while maintaining adequate force transmission.
Solution Approach 2:
The patent uses a composite linkage system combining multiple shafts (first, second, third coupling shafts) with an adjustable stop member. This composite structure allows flexible configuration of the force transmission path, enabling optimization of both force transmission efficiency and effort-saving effect simultaneously.
4Productivity
If no safety mechanism is provided to allow immediate re-triggering, then operational speed is improved, but false triggering occurs, reducing reliability
Solution Approach 1:
The patent implements a safety mechanism where the hook member must be manually returned to the hooked position before the stapler can be triggered again. This preliminary action prevents accidental or false triggering by ensuring the user consciously prepares the device for another operation, thereby improving reliability without significantly impacting operational speed.
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 design achieves effort-saving operation with positive staple striking and prevents false triggering, enhancing user convenience and operational efficiency.
Implementation Method 1
a restoring member (70), wherein the restoring member (70) has a first connecting end connected to the body (10), and a second connecting end connected to the hook member (60), and the elastic force of the restoring member (70) makes the hook portion (64) of the hook member (60) displace downwardly
Implementation Method 2
An end of the elastic unit is inserted in the installation hole of the staple driver
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A stapler includes a body (10) having a shaft displacement limiting portion (13), first and second shafts (S1,S2) each connected to the body (10), a staple driver (20) having a hooked hole (22), an elastic unit (3) elastically driving the staple driver (20), an operation lever (40) inserted by the first shaft (S1), a third shaft (S3) making the operation lever (40) pivotably connected with a pivotably connecting member (50), a hook member (60) having a second hole (61) wherein the second shaft (S2) is inserted, an elongated hole (62) wherein the third shaft (S3) is inserted, and a hook portion (64) releasably hooked at the hooked hole (22), a fourth shaft (S4) making the pivotably connecting member (50) pivotably connected with the hook member (60) in a way that the fourth shaft (S4) is slidably abutted against the shaft displacement limiting portion (13) when the hook member (60) is swung, and a restoring member (70) for forcing the hook portion (64) to displace downwardly. A first distance (D1) is provided from the axis of the first shaft (S1) to the axis of the third shaft (S3). A second distance (D2) is provided from the axis of the third shaft (S3) to the axis of the fourth shaft (S4). The first distance (D1) is smaller than or equal to the second distance (D2). As a result, the present invention provides a specific force applying mode and has relatively better effort-saving effect.