Razor Handle Actuation Surface for Easier Cartridge Release
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Solution Overview
Problem
Conventional razor handles face challenges in easily removing replaceable razor cartridges due to insufficient frictional force between the user's thumb and the actuation part, often resulting from a small contact area and slippery surfaces, making it difficult to operate the actuation mechanism effectively.
Innovation Solution
The razor handle design includes an actuation part with a concave upper surface featuring distinct slope angles and elastic elements to increase the contact area and friction, allowing for easier operation and assembly in a single direction, along with a plunger mechanism to facilitate rotational and backward movement of the cartridge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the actuation part has a conventional flat upper surface with concentrated pressure area, then the structure is simple, but the contact area between user's thumb and actuation part is small resulting in insufficient frictional force
Solution Approach 1:
The upper surface of the actuation part is designed with a concave curved shape that corresponds to the curvature of the user's thumb. This curved surface increases the contact area between the thumb and actuation part, generating sufficient frictional force for easy operation while maintaining a simple overall structure.
2Ease of operation
If the actuation part upper surface is made smooth for easy cleaning, then maintenance is easier, but the frictional force between thumb and surface becomes insufficient
Solution Approach 1:
The actuation part features a concave upper surface with increased surface area that maintains smoothness for easy cleaning while providing sufficient friction through the enlarged contact area. The local concave geometry enhances thumb contact without requiring additional surface treatments or textures.
3Adaptability or versatility
If the actuation part can be assembled in multiple directions, then assembly flexibility is improved, but incorrect assembly may occur
Solution Approach 1:
The actuation part incorporates asymmetric features including a concave upper surface with specific curvature and directional grooves on the side surface. These asymmetric elements guide the assembly process to allow insertion only in the correct orientation, preventing incorrect assembly while maintaining simple manufacturing processes.
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 design enables smoother and more ergonomic removal of the razor cartridge with reduced operational force, enhanced adhesion, and prevents incorrect assembly by ensuring the actuation part can only be assembled in one direction.
Implementation Method 1
an elastic part positioned on an upper surface of the actuation part. The elastic part may increase a frictional force generated between a finger of the user and the upper surface of the actuation part during operation of the actuation part.
Data Source
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AI summary
A razor handle according to one embodiment of the present invention is a razor handle coupled to a razor cartridge accommodating at least one blade, the razor handle comprising: a head part detachably coupled to the razor cartridge; a grip part extending from the head part in a longitudinal direction; and an operation unit provided in the head part and capable of controlling whether to discharge the razor cartridge in a state in which the head part and the razor cartridge are coupled to each other, wherein the upper surface of the operation unit comprises a central portion, a first region upwardly inclined from the central portion toward the front, a second region upwardly inclined from the central portion toward the rear, a third region upwardly inclined from the central portion toward one side in a transverse direction perpendicular to the longitudinal direction, and a fourth region upwardly inclined from the central portion toward the other side in the transverse direction.