Binding Device Lever Mechanism Single-Hand Operation
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Solution Overview
Problem
Existing binding devices require two separate movements for approaching and deforming a deformable channel, with one movement covering a long distance with minimal force and the other a short distance with high force, making the process cumbersome and inefficient.
Innovation Solution
A binding device where both the approach of the clamping jaw to the channel and its deformation are achieved through a single movement of the hand lever, utilizing a lever mechanism and pressure piece, with a gear segment and rack system to transmit force efficiently, allowing a long distance movement with less force and a short distance movement with greater force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two separate movements are used for approaching and deforming the channel, then the binding process can be completed, but the operation becomes cumbersome and inefficient
Solution Approach 1:
The patent combines two separate movements (approach movement and deformation movement) into a single unified movement of one hand lever. The first clamping jaw is connected to the hand lever through a lever mechanism that provides both the approach movement and the deformation movement in sequence, eliminating the need for two separate hand levers and operations.
Solution Approach 2:
The lever mechanism dynamically changes its mechanical advantage during the operation. During the approach phase, the lever mechanism provides a mechanical advantage that requires minimal force. During the deformation phase, the mechanical advantage changes to provide the necessary high force, allowing a single lever to perform both functions effectively.
2Ease of operation
If a single hand lever is used for both approach and deformation movements, then operator effort is reduced, but the mechanical system becomes more complex
Solution Approach 1:
The mechanical system is segmented into distinct functional components: the hand lever, the lever mechanism with multiple levers, the first clamping jaw, and the pressure piece. Each component has a specific function, and their coordinated operation achieves both approach and deformation movements through a single hand lever operation.
Solution Approach 2:
The lever mechanism acts as an intermediary between the hand lever and the first clamping jaw. It translates the single hand lever movement into the required sequence of approach and deformation movements, mediating the force and motion transmission while reducing operator effort.
3Force
If the pressure piece slides over the pressure surface, then deformation force is applied, but frictional forces increase wear and require greater operator force
Solution Approach 1:
The pressure piece is designed with a curved or rounded contact surface that rolls against the pressure surface during deformation. This rolling contact replaces sliding friction with rolling friction, significantly reducing the frictional forces and wear while maintaining the necessary deformation force.
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 design simplifies the binding process by allowing a single-hand operation that reduces operator effort and minimizes frictional forces, enhancing ease of use and reducing wear on components.
Implementation Method 1
The movement of the first clamping jaw towards the channel is achieved via the lever mechanism
Implementation Method 2
a gear segment and rack system to transmit force efficiently
Implementation Method 3
The pressure lever has a roller bearing for rotating the outer ring about the axis of rotation. When pressure is applied to the pressure surface, the outer ring rolls on the pressure surface. This minimizes the frictional forces that occur between the pressure piece and the pressure surface.
Data Source
Figure 1
Figure 2a
Figure 2b
AI summary
The device has a pressure lever (46) comprising a gear segment (50) at a lever arm and a pressure piece (52) for application of force on a pressure surface (58). The gear segment is engaged with a gear rod (60) that is connected with a hand lever (12) and supported in a frame (18) such that a movement of the hand lever in an actuating direction effects a movement of the pressure piece in a direction towards the pressure surface. The pressure piece is arranged such that the piece contacts the pressure surface after reaching an intermediate position of the hand lever.