Knife Bolster Curved Ridge Grip Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Many non-professionals lack the proper technique to hold a knife effectively, leading to reduced control and increased risk of accidents while using knives for various cutting tasks.
Innovation Solution
The design of a knife with a bolster featuring a curved shape and surface depression, positioned between the blade and handle, encourages a 'pinch' or 'grasp' grip, positioning the user's thumb and index finger closer to the blade for enhanced control and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the knife handle is designed with traditional scales and bolster configuration, then the knife provides basic structural stability and finger protection, but the user's hand is positioned too far from the blade resulting in reduced control and precision
Solution Approach 1:
The bolster is segmented into multiple functional zones with varying heights and textures. The first bolster portion has a first height and texture, while the second bolster portion has a second height and texture, creating distinct gripping zones that guide the user's hand position closer to the blade for improved control without complicating the overall handle structure
Solution Approach 2:
Different portions of the bolster are given different local qualities through varying heights and surface textures. The first and second bolster portions have different heights and textures to provide localized grip characteristics that encourage proper hand positioning while maintaining overall structural simplicity
2Reliability
If the bolster is made thicker to provide finger protection, then safety is improved, but the user's hand cannot be positioned close to the blade for precise control
Solution Approach 1:
The bolster is divided into multiple portions with different heights. The first and second bolster portions have different heights that create a stepped configuration, allowing the user's hand to be positioned closer to the blade for precision while the varying heights maintain protective coverage for different finger segments
Solution Approach 2:
The bolster design incorporates vertical dimensionality variation through different heights at different positions. This three-dimensional configuration allows the hand to approach the blade closer horizontally while the vertical height variations provide protective coverage, resolving the contradiction between protection and precision
3Ease of operation
If the handle guard is positioned lower to allow hand placement closer to the blade, then control is improved, but the risk of hand slipping onto the blade increases
Solution Approach 1:
The handle guard is segmented into multiple portions with varying heights. The first, second, and third handle guard portions have different heights that create a stepped protective barrier, allowing the hand to be positioned closer to the blade for improved control while the varying heights provide differentiated protection against slipping at different locations
Solution Approach 2:
Different portions of the handle guard are given different local qualities through varying heights and textures. This creates localized protective zones that guide proper hand positioning while maintaining safety at each segment, allowing close hand placement without excessive slip risk
4Ease of operation
If the bolster and handle guard are designed with flat surfaces, then manufacturing is simple, but the user's hand cannot be positioned optimally for professional-like grip
Solution Approach 1:
The bolster and handle guard are segmented into multiple portions with different heights and textures. This segmentation creates distinct gripping zones that guide optimal hand positioning for professional-like grip while each segment can be manufactured using standard forming processes, balancing complexity and manufacturability
Solution Approach 2:
The bolster and handle guard incorporate curved surfaces and rounded transitions between different portions. These curved geometries guide the user's hand into the optimal gripping position naturally while being manufacturable through standard molding or machining processes, avoiding the need for overly complex manufacturing
Data Source
AI summary
A knife for cutting food products having a proximal end, a distal end and a length defined therebetween. The knife includes a blade portion having a cutting edge and a spine disposed on a top side of the blade portion and generally opposed to the cutting edge. The knife includes a handle portion disposed proximal of the blade portion with a top surface and a bottom surface, a first end proximal to the blade portion and a second end distal to the blade portion. The handle portion includes a bolster section with at least a first thickness, a first lateral sidewall and a second lateral sidewall. The bolster section is disposed at the first end of the handle portion and adjacent to the blade portion. The first sidewall of the bolster section includes an arcuate proximal bolster boundary defined by a curvilinear ridge extending downwardly toward the blade portion from a point proximate the top surface of the handle portion. The first sidewall of the bolster section also includes an arcuate distal bolster boundary being defined by a curvilinear ridge extending downwardly toward the blade portion from a point proximate the bottom surface of the handle portion. A portion of the curvilinear ridge defining the arcuate proximal bolster boundary is spaced a distance along the length of the knife from a portion of the curvilinear ridge defining the arcuate distal boundary. A surface depression is formed in at least one of the first lateral sidewall and the second lateral sidewall, the surface depression being disposed between the curvilinear ridge defining the arcuate proximal bolster boundary.