Razor Handle Coupling Mechanism to Prevent Cartridge Separation
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Solution Overview
Problem
Existing razor handles suffer from unintentional separation of the razor cartridge due to pivoting when external forces are applied, leading to potential loss of the cartridge.
Innovation Solution
A razor handle design featuring a coupling portion with a restoring force providing portion that restricts the release of the razor cartridge by interfering with a support surface through a retractable plunger mechanism, ensuring the cartridge remains attached during pivoting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a releasable coupling mechanism is used to connect the razor cartridge to the handle, then the ease of operation for cartridge replacement is improved, but the reliability of the connection under external forces deteriorates
Solution Approach 1:
The restoring force providing portion is configured to preemptively counteract external forces that could cause unintended separation. When the razor cartridge pivots due to external force (such as dropping the razor), the restoring force providing portion moves to engage with the support surface, creating a counteracting force that prevents the connector from disengaging from the coupling portion.
Solution Approach 2:
The coupling mechanism transitions from a static connection to a dynamic system that responds to external forces. The restoring force providing portion is designed to move forward or backward in conjunction with pivoting of the razor cartridge, allowing the system to adapt its restraining force based on the degree of pivoting and external force applied.
2Ease of operation
If the coupling mechanism allows free pivoting of the razor cartridge, then the ease of operation for cartridge attachment is improved, but the reliability under accidental forces deteriorates
Solution Approach 1:
The restoring force providing portion is pre-configured in a position where it can immediately engage with the support surface when pivoting occurs. The geometric relationship between the restricting surface, support surface, and restoring force providing portion is designed so that normal attachment operations are unaffected, but unintended pivoting automatically triggers the restraining action.
3Reliability
If a restricting mechanism is added to prevent cartridge release, then the reliability of connection is improved, but the device complexity increases
Solution Approach 1:
The restoring force providing portion is integrated into the existing coupling portion structure rather than being a separate component. The plunger mechanism is incorporated within the coupling portion, and the restricting surface is formed as part of the coupling portion's geometry, merging multiple functions into a unified structure that reduces overall complexity.
Solution Approach 2:
The coupling mechanism is designed to automatically activate the restraining force without user intervention. When the razor cartridge pivots, the geometric relationship between components automatically causes the restoring force providing portion to engage with the support surface, creating a self-regulating system that responds to the degree of pivoting.
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
Prevents unintentional separation of the razor cartridge from the handle, maintaining secure engagement even under external forces such as accidental drops.
Implementation Method 1
a restoring force providing portion configured to move forward or backward in conjunction with pivoting of the razor cartridge and to provide a pivot restoring force to the razor cartridge
Data Source
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AI summary
The present invention relates to a razor handle which receives at least one blade in a longitudinal direction and is coupled to a razor cartridge having a connector on one side, the razor handle comprising: a coupling part detachably coupled to the connector; and a restoring force providing part which moves forward or backward in conjunction with the rotation of the razor cartridge and provides rotational restoring force to the razor cartridge, wherein the coupling part includes a support surface interfered with by the restoring force providing part according to a retreat distance of the restoring force providing part, and the restoring force providing part includes a limiting surface which faces the support surface according to a retreat distance and prevents the connector from being separated from the coupling part.