Garden Cutting Device Cable Knot Integration
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Solution Overview
Problem
Existing cutting devices, such as garden shears, face challenges in efficiently transmitting driving force between handle elements due to complex arrangements and susceptibility to environmental factors, leading to reduced durability and increased risk of malfunction.
Innovation Solution
A cutting device with a compact drive force transmission element, specifically a cable with a sling and knot, integrated into the opening spring, which is protected from environmental influences and allows for easy mounting and dismounting, reducing the number of components and entanglement risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex arrangement of drive force transmission elements is used between handle elements, then the cutting device can transmit driving force effectively, but the device becomes more complex and susceptible to environmental factors
Solution Approach 1:
The patent combines the drive force transmission element (cable) with the opening spring into a single integrated component. The cable is routed through the opening spring, eliminating the need for separate protective housings or complex mounting structures. This merging reduces the number of components while maintaining protection against environmental factors, directly resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The drive force transmission element (cable) is nested within the opening spring structure. The cable passes through the coils of the opening spring, which acts as both a protective sheath and a functional component. This nesting arrangement protects the cable from environmental influences while utilizing the existing spring structure, thereby reducing overall device complexity without compromising durability.
2Ease of manufacture
If multiple separate components are used for drive force transmission, then the system can be robust, but the number of components increases and assembly becomes more difficult
Solution Approach 1:
The patent merges the cable mounting structure with the opening spring into a single integrated component. Instead of using separate clamps, housings, or mounting brackets to secure the cable between handle elements, the opening spring itself serves as the protective and structural element. This reduces the number of components that need to be assembled while simplifying the manufacturing process.
Solution Approach 2:
The opening spring performs multiple functions: it provides the opening force for the cutting device, protects the drive force transmission element from environmental factors, and serves as the mounting structure for the cable. This multi-functionality eliminates the need for separate components for each function, thereby reducing the total number of parts and simplifying assembly operations.
3Reliability
If the drive force transmission element is exposed between handle elements, then assembly is simpler, but the element is susceptible to environmental influences and wear
Solution Approach 1:
The cable is nested within the opening spring coils, which act as a protective sheath. This nesting arrangement protects the cable from environmental influences such as moisture, dirt, and physical damage without requiring separate protective housings or complex mounting structures. The opening spring itself becomes the protective element, maintaining simplicity while enhancing reliability.
Solution Approach 2:
The opening spring serves dual purposes: providing the mechanical opening force and protecting the drive force transmission element. This multi-functionality allows the cable to be protected from environmental factors without adding separate protective components, thereby maintaining device simplicity while improving reliability against wear and environmental damage.
Data Source
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AI summary
The invention relates to a cutting device (10), in particular a garden cutting device, with a first and a second cutting element (12, 14) movable relative to each other, with a first and a second handle element (16, 18) movable relative to each other, with at least one drive unit (20) which, in at least one operating state, is provided to at least assist a movement of the second cutting element (14) relative to the first cutting element (12), and with at least one drive force transmission element (340) which is operatively connected to the drive unit (20) in at least one operating state. It is proposed that the drive force transmission element (340) comprises a loop (1502) and a knot (1500).