Multi-Pivot Garden Shears for Thick-Branch Cutting
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Solution Overview
Problem
Conventional garden shears have limited opening capacity, making them ineffective for pruning thicker branches.
Innovation Solution
The design incorporates a first and second blade member with toothed sections and a controlling handle, along with a protecting member, allowing for increased opening range and enhanced shearing force through a pivoting mechanism and leverage effect, while the protecting member stabilizes the handle and prevents accidental injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional garden shears with a single aperture axis are used, then the structure is simple, but the opening capacity is limited and cannot prune thicker branches
Solution Approach 1:
The handle structure is segmented into multiple functional components: a first handle member with a first aperture, a second handle member with a second aperture, and a controlling member with a third aperture. Each aperture serves as a separate rotation axis, allowing the cutting blades to achieve greater opening capacity while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The invention transitions from a single-axis rotation system to a multi-axis rotation system. The first aperture provides a first rotation axis, the second aperture provides a second rotation axis, and the third aperture provides a controlling rotation axis. This dimensional expansion in the mechanical system enables the cutting blades to open to a wider angle, accommodating thicker branches.
2Force
If the opening capacity is increased to prune thicker branches, then the shearing force is improved, but the risk of injury and abnormal shaking increases
Solution Approach 1:
The controlling member acts as an intermediary component between the user's input force and the cutting blades. It transmits and distributes the applied force through the third aperture rotation axis, enabling controlled movement of the cutting blades while reducing abnormal shaking and potential injury risks through smoother force transmission.
Solution Approach 2:
Instead of directly applying force to the cutting blades, the user applies force to the controlling member, which then indirectly controls the blade movement through the third aperture axis. This inverted control mechanism provides better force distribution and reduces the risk of injury from direct contact with moving blades.
3Adaptability or versatility
If a multi-aperture handle structure is implemented, then the opening range is increased, but the device complexity increases
Solution Approach 1:
The controlling member with the third aperture serves multiple functions: it acts as a rotation axis for the second handle member, provides a control point for user input, and enables coordinated movement of the cutting blades. This multi-functionality reduces the need for separate components, thereby managing device complexity while achieving increased opening range.
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 efficient cutting of thicker objects, reduces labor and time required, enhances the overall strength of the garden shears, and prevents accidental injury by dispersing force and stabilizing the handle.
Implementation Method 1
The first toothed section (13) and the second toothed section (33) are respectively engaged with each other, so as to increase an opening range
Implementation Method 2
The first toothed section (13) and the second toothed section (33) are respectively engaged with each other
Implementation Method 3
the protecting member (40) is capable of dispersing a force
Data Source
AI summary
A garden shears has a first blade member, a second blade member, a controlling handle and a protecting member. The first blade member has a first cutting portion, a first aperture at a middle section, a first toothed section adjacent to the first aperture and below the first cutting portion. The second blade member has a second cutting portion, a second aperture at a middle section, a third aperture at a lower end. The controlling handle has a driving member with a fourth aperture and the second toothed section on a top edge at an upper section. The protecting member has a main body with two opposing ear portions, each ear portion having a fifth aperture and a sixth aperture.