Gardening Trimmer Blade Structure to Block Grease Capillary Flow
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Solution Overview
Problem
The overlapping configuration of the facing member and the blade in gardening trimmers leads to increased sliding resistance due to grease entering the minute gap between them through capillary action, which adversely affects the reciprocating movement.
Innovation Solution
Incorporating suppressing structures on the facing member and/or the blade to prevent grease from moving towards the front end, thereby reducing sliding resistance by obstructing capillary action at critical points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grease is applied to the conversion mechanism for lubrication, then the lubrication effect is improved, but the grease enters the minute gap between the facing member and the first blade through capillary action, causing sliding resistance to increase
Solution Approach 1:
The first blade is segmented into multiple sections by first slots, creating discrete segments separated by connecting portions. This segmentation prevents continuous grease flow through capillary action along the blade length, as the grease must pass through the connecting portions which act as flow resistance barriers, thereby reducing grease accumulation at the front end while maintaining lubrication at the conversion mechanism.
Solution Approach 2:
The connecting portions serve as intermediary elements between the slots, controlling and regulating the movement of grease. These connecting portions allow minimal grease passage to maintain lubrication while sufficiently restricting capillary flow to prevent excessive grease accumulation that would increase sliding resistance between the blade and facing member.
2Ease of operation
If the facing member overlaps with the first blade to guide reciprocating movement, then the movement guidance is improved, but the minute gap between them allows grease to enter and accumulate, increasing sliding resistance
Solution Approach 1:
By segmenting the blade structure with slots and connecting portions, the invention maintains the overlapping configuration for movement guidance while interrupting the continuous gap that would otherwise allow unrestricted grease flow. The segmented structure preserves guidance function while limiting capillary action.
Solution Approach 2:
The connecting portions are strategically designed with specific dimensions and material properties that differ from the main blade body. These local variations in structure create regions with controlled capillary characteristics, allowing the blade to maintain overall guidance function while specific local regions (the connecting portions) restrict grease flow to minimize sliding resistance.
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 suppressing structures effectively minimize the increase in sliding resistance and prevent grease accumulation at the front end of the blade, enhancing the reciprocating movement efficiency.
Implementation Method 1
the grease applied to the conversion mechanism enters the minute gap between the facing member and the first blade due to capillary action, and moves toward a front end of the first blade
Data Source
AI summary
A gardening trimmer may include: a first blade; a facing member overlapping with the first blade in a second direction perpendicular to a first direction; and a suppressing structure. Grease may be applied to at least a part of a conversion mechanism. The first blade may include: a plurality of first slots; and a plurality of pairs of first connecting portions, wherein each pair of the first connecting portions is disposed at opposite ends of corresponding one of the first slots in a third direction perpendicular to the first and second directions. The suppressing structure may be configured to suppress the grease from moving toward a front end of the first blade in the first direction. The suppressing structure may be disposed on the facing member at a position facing at least one pair of in the second direction when the first blade reciprocates relative to the facing member.