Grooved Kitchen Knife Handle for Secure Low-Fatigue Grip
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Solution Overview
Problem
Existing kitchen knives often fail to achieve a balanced design that optimizes user comfort, grip security, and cutting precision, leading to muscle fatigue and potential slippage during use.
Innovation Solution
A knife design featuring a one-piece metallic handle with specific geometric features, including grooves and flares, that adapt to the user's hand shape, ensuring a secure grip and reducing pressure requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the handle is made with a simple smooth surface, then it is easy to manufacture, but the grip security deteriorates causing slippage during use
Solution Approach 1:
The handle surface is not uniformly textured but features grooves at specific locations (on the handle flanks) where grip contact occurs. This localized texturing provides enhanced grip security exactly where the user's fingers contact the handle, while keeping other areas smooth for easy manufacture and comfortable contact.
Solution Approach 2:
The handle surface is segmented into distinct regions: smooth areas for comfort and simplicity, and grooved areas for grip security. The grooves divide the contact surface into multiple zones that provide friction and prevent slippage without requiring the entire handle to be complex or difficult to manufacture.
2Reliability
If excessive pressure is applied on the handle to maintain grip, then grip security improves, but muscle fatigue increases
Solution Approach 1:
The grooves are positioned specifically on the handle flanks where the user's fingers naturally contact and apply pressure. This localized feature allows secure grip with minimal pressure by concentrating friction and anti-slip properties exactly where needed, rather than requiring the user to apply excessive pressure across the entire handle.
3Ease of operation
If the handle geometry is customized for each user's hand shape, then grip optimization improves, but device complexity increases
Solution Approach 1:
The handle with grooves on its flanks provides an universally adaptable grip solution that works for various hand shapes and sizes. The groove configuration creates a versatile grip interface that can accommodate different users without requiring custom designs, maintaining simplicity while achieving good ergonomics for most hands.
4Ease of manufacture
If the grooves are oriented parallel to the longitudinal direction, then manufacturing is simplified, but grip security during cutting motions deteriorates
Solution Approach 1:
The grooves are oriented at an angle (oblique to the longitudinal direction) rather than parallel, creating an asymmetric pattern relative to the handle axis. This angled orientation provides superior grip security during cutting motions by creating friction components that resist both longitudinal and transverse slippage, while remaining simple enough to manufacture with standard machining operations.
Data Source
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AI summary
The invention relates to a knife comprising a blade (1) and a handle (2), wherein the handle (2) comprises a plurality of grooves (400) provided on at least one of the sides (23) of the handle, the grooves (400) being distinct from each other, with a reference groove (410) positioned closest to the blade (1) and the other grooves (400) being arranged adjacently starting from the reference groove (410) and going along the handle (2) towards a free end of the handle (2) opposite the blade (1). Each groove (400) has a mean direction of extension (410), the projection of which in the longitudinal plane forms a groove angle γ with the longitudinal direction (L), the reference groove (410) being oriented at a reference groove angle γR comprised between 0° and 10°, and each subsequent groove (400) of the plurality of grooves (400) having a groove angle γ greater than the reference groove angle γR, the respective groove angles γ of two adjacent grooves (400) being different.