Razor Handle Plunger Coupling for Secure Cartridge Retention
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Solution Overview
Problem
Existing razor handles fail to prevent unintentional separation of razor cartridges during use, particularly when subjected to external forces such as accidental drops.
Innovation Solution
A razor handle design featuring a coupling portion with a restoring force providing portion that includes a support surface interfered by a restricting surface, which restricts the release of the razor cartridge by providing a pivot restoring force through a plunger mechanism, ensuring the cartridge remains attached even under external stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the razor cartridge is designed to be easily detachable for replacement, then the ease of operation is improved, but the reliability deteriorates due to unintentional separation during use
Solution Approach 1:
The coupling mechanism transitions from a static connection to a dynamic one where the cartridge can pivot relative to the handle during use, but the restoring force automatically maintains engagement. The plunger mechanism moves dynamically with cartridge insertion and removal while providing continuous restoring force to prevent unintended separation.
Solution Approach 2:
The system changes the engagement state parameter based on external forces. During normal use, the restoring force maintains a specific engagement parameter range that prevents separation. When external force exceeds the threshold (unintended separation attempt), the parameter changes to allow detachment, and during intentional replacement, the parameter transitions to fully detached state.
2Device complexity
If a simple coupling mechanism is used for attaching the cartridge, then the device complexity is reduced, but the reliability deteriorates as it cannot prevent unintentional separation under external forces
Solution Approach 1:
The plunger mechanism provides self-service by automatically generating restoring force through its own deformation or elastic properties. The coupling portion and connector work together to automatically maintain engagement without requiring external control systems, sensors, or power sources, thus maintaining simplicity while improving reliability.
Solution Approach 2:
The plunger acts as an intermediary element between the coupling portion and the connector, mediating the force transmission and providing the restoring force that prevents unintended separation. This intermediary mechanism adds minimal complexity while significantly improving the reliability of the coupling.
3Ease of operation
If the coupling portion allows free movement for easy cartridge replacement, then the ease of operation is improved, but the reliability worsens due to potential separation under external forces such as accidental drops
Solution Approach 1:
The restoring force providing portion preemptively applies a counteracting force to prevent unintended separation before it can occur. When external forces such as accidental drops are applied, the restoring force is already in place to counteract these forces and maintain engagement, rather than waiting for separation to begin and then reacting.
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 unintended separation of the razor cartridge from the handle, maintaining secure attachment during normal use and under external forces, enhancing user convenience and safety.
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
Implementation Method 2
the coupling portion comprises a support surface that is interfered by the restoring force providing portion based on a retreat distance of the restoring force providing portion, and wherein the restoring force providing portion comprises a restricting surface that faces support surface and restricts release of the coupling between the coupling portion and the connector
Data Source
AI summary
A razor handle 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 may include 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. The coupling part may include a support surface interfered with by the restoring force providing part according to a retreat distance of the restoring force providing part. The restoring force providing part may include a limiting surface which faces the support surface according to a retreat distance and prevents the connector from being separated from the coupling part.