Gardening Shear Handle Assembly for Easy Material Separation
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Solution Overview
Problem
Conventional gardening shears are difficult to recycle due to the separation of nonmetallic components from metallic components, leading to high recycling costs and discouraging recycling efforts.
Innovation Solution
The gardening shears are designed with a metallic unit and a nonmetallic unit that engage via engagement spaces and engaging portions, allowing easy detachment by a simple pull when recycling, eliminating the need for damaging separation methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pads are covered on handles in a close-fitting manner to ensure easy grip and no-slip effect, then ease of operation is improved, but difficulty of separating nonmetallic components from metallic components increases, worsening recycling efficiency
Solution Approach 1:
The gardening shears are divided into distinct metallic components (handles, blades, screw, nut) and nonmetallic components (pads). The engagement spaces and engaging portions create defined separation points, allowing the pads to be easily detached from the handles during recycling without damaging either component.
2Strength
If conventional gardening shears use traditional fastening methods with screws and nuts, then structural strength is improved, but difficulty of separation increases, requiring deliberate damage to remove pads
Solution Approach 1:
The engagement portions are extracted from the pads and inserted into corresponding engagement spaces on the metallic components. This extraction-based connection allows the nonmetallic pads to be easily removed by pulling them away from the handles, eliminating the need for damaging separation methods while maintaining structural integrity during use.
3Reliability
If pads are firmly attached to handles for secure grip, then reliability of operation is improved, but recycling cost increases due to laborious separation process
Solution Approach 1:
The connection between pads and handles is designed to be dynamic rather than static. The engaging portions can be easily inserted into and removed from engagement spaces, allowing the pads to be firmly attached during operation for secure grip but easily separated during recycling, thereby reducing labor costs and encouraging recycling.
Data Source
AI summary
Recycling-friendly gardening shears include a metallic unit and a nonmetallic unit. The metallic unit has metallic components. At least one of the metallic components has an engagement space. The nonmetallic unit has engaging portions. The metallic components are smoothly coupled to the nonmetallic unit as soon as the engagement spaces engage with the engaging portions. When the gardening shears are no longer usable and thus are suitable for recycling, a user only needs to exert a simple pull to separate the engaging portions quickly from the engagement spaces and thus conveniently detach the nonmetallic unit from the metallic components. The gardening shears include a metallic unit and a nonmetallic unit. The metallic unit has metallic components, such as a gardening shear body, resilient element, block, spring, and positioning pin. The nonmetallic unit has two pads, a buffer and a knob which are mounted on the gardening shear body.