Stapling Device Lever Mechanism Reduces User Force
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Solution Overview
Problem
Conventional stapling devices require users to exert significant force by pressing the driver leg as far forward as possible, making them difficult to handle and requiring more force than necessary for stapling.
Innovation Solution
A stapling device with a pivotable anvil leg and levers that allow pressure to be applied centrally or rearwardly, distributing force more uniformly through a system of pivotable components and force transfer elements, such as rollers, which reduces the required force during stapling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If pressure is exerted on the driver leg as far forward as possible, then sufficient stapling force is achieved, but the device becomes difficult to handle and requires excessive force
Solution Approach 1:
The anvil leg is made pivotable relative to the lower part, allowing the system to dynamically adjust its configuration during operation. This pivotable mounting enables the anvil leg to rotate about a pivot axle, transforming the rigid structure into a dynamic one that can adapt to different operating conditions and reduce the force required by the user
Solution Approach 2:
The device is divided into separable functional components: the lower part (fixed), the anvil leg (pivotable), and the driver leg (movable). This segmentation allows each component to perform its specific function independently, with the anvil leg's pivotable mounting acting as a mechanical advantage system that reduces the effort needed to achieve sufficient stapling force
2Power
If the driver leg is pressed down as far forward as possible, then adequate stapling force is generated, but the operation becomes more complex and difficult
Solution Approach 1:
The pivotable anvil leg introduces dynamic movement to the system, allowing it to rotate during the stapling operation. This dynamic configuration change simplifies the operation by enabling the user to press down on the driver leg without requiring it to extend as far forward, thereby reducing operational complexity while maintaining adequate stapling power
Solution Approach 2:
The pivotable anvil leg acts as an intermediary mechanical element between the driver leg and the stapling action. By introducing this intermediate pivotable component, the system transforms the direct force application into a more efficient mechanical action, reducing both the distance and complexity of the required user input
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 reduces the force needed for stapling, making the device easier to handle and use, as pressure can be applied in various positions rather than solely at the front, and the force distribution mechanism ensures efficient staple penetration and bending.
Implementation Method 1
a roller which is rigidly or rotatably attached to the driver leg or to the lever
Implementation Method 2
mounted on the anvil leg by means of a second bearing, which is a pivot axle
Data Source
AI summary
A stapling device extends in a longitudinal direction from a front region to a rear region, having a bottom part having a set-down surface on its underside, having an anvil leg that is mounted so as to be pivotable in a limited manner about a first pivot pin in the front region with respect to the bottom part and carries an anvil plate in the front region, having a staple magazine that is mounted on a bearing block in the rear region so as to be pivotable in a limited manner about a second pivot pin with respect to the anvil leg, having a driver leg that is mounted so as to be pivotable in a limited manner about the second pivot pin with respect to the anvil leg and with respect to the staple magazine and has a driver for guiding staples through a gap at the front end of the staple magazine and for pressing the staples against the anvil plate, and having at least one longitudinally extending lever which is mounted on the bottom part by means of a first bearing in the rear region and on the anvil leg by a second bearing between the front region and the rear region, wherein one of the bearings is a third pivot pin and the other bearing is a floating bearing, and wherein the at least one lever is coupled to the driver leg, at the front, end of the lever facing the front region, such that a movement of the front end towards the anvil leg results in a movement of the driver towards the anvil plate.