Trimmer Blade Groove Design Suppresses Edge Interference
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Solution Overview
Problem
In trimmers, the movable and fixed blades often warp, leading to interference between their edges, which can result in reduced cutting quality and increased risk of blade edge collisions.
Innovation Solution
The trimmer blade design includes a movable plate with multiple blades and a fixed plate with fixed blade grooves, where the second movable blade contacts the first fixed blade when the first movable blade is in the groove, distributing the force and preventing interference, and the third movable blade contacts the second fixed blade to further prevent warping and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the movable blades or fixed blades are pressed against the target region, then the cutting function is improved, but the blades warp and blade edges interfere with each other
Solution Approach 1:
The patent introduces a groove structure as an intermediary element between adjacent fixed blades. When a movable blade enters this groove during reciprocating motion, the groove acts as a mediator that prevents the movable blade from directly contacting and interfering with adjacent fixed blades, thereby eliminating blade edge interference while maintaining cutting function
Solution Approach 2:
The groove structure is designed in advance between adjacent fixed blades to provide a buffer zone. When movable blades reciprocate and are pressed against the target region, the groove预先 (in advance) absorbs and cushions the potential interference, preventing blade warping and edge collision before they can occur
2Productivity
If the movable blades or fixed blades are pressed against the target region, then the cutting function is improved, but the blades warp
Solution Approach 1:
The groove structure serves as a mediator that distributes and absorbs the mechanical stress applied to the blades during cutting. By providing this intermediate structure, the blades are prevented from warping under pressure while maintaining their cutting function
Solution Approach 2:
The groove is designed in advance to cushion and absorb the pressure applied during cutting operations. This beforehand cushioning prevents blade warping by providing a stress-relief mechanism before the blades can deform under load
3Productivity
If the movable blades or fixed blades are pressed against the target region, then the cutting function is improved, but the blade edges collide
Solution Approach 1:
The groove structure acts as an intermediary barrier between adjacent fixed blades. When movable blades reciprocate during cutting, the groove prevents direct contact between movable blade edges and fixed blade edges, thereby eliminating the harmful collision effect while preserving the cutting function
Solution Approach 2:
The groove is designed in advance to cushion and prevent blade edge collisions. By providing this protective structure before collisions can occur, the harmful effects of blade edge interference are eliminated while maintaining effective cutting operations
Data Source
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AI summary
A trimmer blade 30 includes a movable plate 33 and a fixed plate 31. The movable plate has a plurality of movable blades 50 including a first movable blade 50a, and a second movable blade 50b adjacent to the first movable blade. The fixed plate has a plurality of fixed blades 40 including a first fixed blade 40a, and a second fixed blade 40b adjacent to first fixed blade with a fixed blade groove 41 interposed between the second fixed blade and first fixed blade. When at least one part of the first movable blade is located on the fixed blade groove, the second movable blade comes into contact with the first fixed blade. According to this configuration, it is possible to configure the trimmer blade in which blade edges of the movable blades and blade edges of the fixed blades are unlikely to interfere with each other.