Manual Binding Tool Lever Switching Mechanism
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Solution Overview
Problem
The existing manual binding tools require cumbersome finger transfers between levers for switching from tightening to cutting operations, making the process difficult and tiring, especially when used in high places, leading to instability and frequent breaks during continuous binding work.
Innovation Solution
A manual binding tool with a switching mechanism that adjusts the pulling force, allowing for both tightening and cutting operations to be performed by gripping a pair of levers without transferring fingers, using a pushing mechanism to deform and engage the tie portion, and a return preventing mechanism to maintain stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If finger transfer between levers is implemented for switching operations, then tightening and cutting functions are separated, but operation complexity increases and user fatigue increases
Solution Approach 1:
The patent merges the tightening lever and cutting lever into a single integrated lever structure. The lever body includes both a tightening portion for engaging the tightening mechanism and a cutting portion for engaging the cutting mechanism, eliminating the need for finger transfers between separate levers while maintaining functional separation through spatial distribution of engagement points along the lever's length
2Reliability
If multiple fingers are transferred sequentially between levers, then precise control is maintained, but operation time increases and productivity decreases
Solution Approach 1:
The lever is segmented into distinct functional zones along its length: a tightening portion positioned for initial engagement and a cutting portion positioned for subsequent engagement. This spatial segmentation allows the operator to transition between functions by simply repositioning fingers along the lever body rather than transferring between separate levers, maintaining control precision while reducing operation time
3Adaptability or versatility
If one-handed operation is required for high place work, then mobility is improved, but manipulation stability decreases due to finger transfer difficulty
Solution Approach 1:
By combining both tightening and cutting functions into a single lever, the patent ensures that the operator maintains a continuous one-handed grip on the same tool throughout the entire binding operation. The integrated lever design with spatially distributed engagement points allows function switching without releasing or repositioning the hand, thereby maintaining grip stability and mobility in high-place work environments
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
Enables simplified and easy one-handed operation of tightening and cutting without finger transfers, improving usability and versatility for various binding ties, including those without self-engaging functions, and allows for adjustable tightening force settings.
Implementation Method 1
a return spring (16) that elastically urges the base arm (11) and the second lever (2) to return to the initial position
Implementation Method 2
a second lever (2) that is pivotally supported on the tool body (3) about an axis P
Implementation Method 3
a first lever (1) and second lever (2) for manipulating the tightening mechanism (c)
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
An object is to provide a manual binding tool in which, without performing transferring the fingers, tightening and cutting can be performed simply by gripping a pair of levers, so that the tool can simplify a binding work, and is easy to use. The manual binding tool has: a tightening mechanism a which pulls a projection tie portion 4a that is passed through a head portion 5; a cutting mechanism c which cuts the projection tie portion 4a in a place in the vicinity of the head portion 5; first and second levers 1, 2; a tightening linkage mechanism b which links the both levers 1, 2 with the tightening mechanism a in a state where the projection tie portion 4a is pulled by gripping of the both levers 1, 2 in a range within a predetermined angle; and a cutting linkage mechanism d which links the both levers 1, 2 with the cutting mechanism c in a state where the projection tie portion 4a is cut by gripping the both levers 1, 2 beyond the predetermined angle. A switching mechanism e is disposed which, when a tightening force is smaller than a preset value, causes the tightening linkage mechanism b to operate, and the cutting linkage mechanism d not to operate, and, when the tightening force reaches the preset value, causes the tightening linkage mechanism b not to operate, and the cutting linkage mechanism d to operate.