Garden Shears Linear Spring Structure for Stable Opening
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Solution Overview
Problem
Conventional garden shears with compression springs or V-shaped spring pieces often experience off-axis twisting and deviation, leading to reduced smoothness and convenience in use due to the spring bouncing away from the grips.
Innovation Solution
A garden shears structure utilizing an elastic component with a linear telescopic displacement effect, comprising an upper and lower seat with a shaft column, and a spring between them, to provide smooth opening and closing actions while confining the spring within the seats, preventing it from jumping out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If compression springs or V-shaped spring pieces are used in conventional garden shears, then the spring can provide elastic force for opening and closing, but the spring will expand and compress in an arc state causing off-axis movement, twisting, and deviation
Solution Approach 1:
The patent transitions from arc-state compression (2D curved motion) to linear telescopic displacement (1D straight-line motion) by introducing a telescopic mechanism with guide rails and telescopic arms. This dimensional change constrains the spring's movement path, preventing off-axis twisting and deviation while maintaining elastic force generation.
Solution Approach 2:
The patent introduces intermediate components including guide rails, telescopic arms, and connection links that mediate between the spring and the grip mechanism. These intermediaries transform the spring's elastic force into controlled linear motion, preventing direct arc-state expansion that causes instability.
2Ease of operation
If compression springs are used with shaft bolts as axes for opening and closing, then the spring can drive the grips to open and close, but the spring moves off-axis and is easily twisted or deviated
Solution Approach 1:
The patent replaces the arc-state motion (2D curved path) with linear telescopic displacement (1D straight-line path) by introducing guide rails and telescopic mechanisms. This constrains the spring's movement to a precise linear path, preventing off-axis twisting while maintaining smooth opening and closing operation.
Solution Approach 2:
The patent substitutes the traditional compression spring mechanism with a telescopic elastic component system that uses linear guidance mechanisms. This replacement transforms the mechanical arc-state compression into controlled linear telescopic motion, eliminating alignment deviations.
3Force
If conventional springs are used in garden shears, then the spring can provide elastic force, but the spring easily bounces away from the two grips, causing inconvenience in use
Solution Approach 1:
The patent implements a nested structure where the spring is housed within the telescopic mechanism, and the telescopic arms are nested within guide rails. This nested arrangement physically confines the spring, preventing it from bouncing away while allowing it to exert elastic force through the telescopic motion mechanism.
Solution Approach 2:
The patent introduces intermediate connection components including telescopic arms, connection links, and retention structures that act as intermediaries between the spring and the grips. These intermediaries transmit the spring's elastic force while preventing direct contact that would allow the spring to bounce away.
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
The elastic component ensures smoother operation and improved stability by allowing linear displacement along the axis, effectively preventing the spring from disengaging from the grips, enhancing the overall usability and reliability of the shears.
Implementation Method 1
Both ends of the spring are inserted between the upper and lower seats, used as the elastic power for the telescopic movement of the upper and lower seats
Data Source
AI summary
A garden shears structure includes a first grip, a second grip, and an elastic component. The garden shears structure uses the elastic component to push open the first and second grips and reach the purpose of opening and closing the blade part and the blade jaw part for shearing. When the upper and lower seats of the elastic component are stretched and pushed by the spring, the upper and lower seats can move along the shaft column to achieve a linear displacement effect, so that the elastic component can provide the first and second grips with opening and closing actions in the compressed and stretched state along the axis, thereby making the use of the shears smoother.