Razor Cartridge Coupling With Controlled Ejection and Impact Protection
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Solution Overview
Problem
Existing razor assemblies face issues with exposure of the coupling portion, improper coupling direction recognition, and unpredictable detachment of the razor cartridge, leading to potential damage and inconvenience during handling.
Innovation Solution
A razor assembly design featuring a pivotally coupled razor cartridge with a restoring force providing portion, utilizing first and second arms that move apart and closer to facilitate easy and accurate coupling, and a plunger mechanism for controlled ejection, minimizing exposure of the coupling portion and ensuring predictable detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the coupling portion is exposed for easy access, then the ease of operation is improved, but the vulnerability to external impact increases
Solution Approach 1:
The coupling portion is nested within the handle body, forming a recessed structure where the coupling portion is positioned inside a cavity. This nesting protects the coupling portion from external impact while maintaining accessibility through the open recess structure.
Solution Approach 2:
The handle is divided into distinct functional zones: the coupling portion area with recessed structure, the blade holder area, and the grip area. This segmentation allows the coupling portion to be protected independently while maintaining overall handle functionality and ease of operation.
2Ease of operation
If the coupling mechanism is simplified for easy detachment, then the ease of operation is improved, but the control over detachment distance deteriorates
Solution Approach 1:
The resilient member is pre-loaded in a compressed state during assembly, storing elastic potential energy. When detachment is initiated by moving the handle, this pre-stored energy automatically propels the blade holder outward to a predetermined distance, providing controlled ejection without requiring complex measurement or adjustment mechanisms.
Solution Approach 2:
The resilient member automatically provides the ejection force without external intervention. Once the coupling is released by moving the handle, the resilient member's stored energy self-generates the propulsion force to eject the blade holder to the appropriate distance, eliminating the need for additional actuators or control systems.
3Device complexity
If the arms are positioned closer together for compact design, then the device complexity is reduced, but the coupling accuracy deteriorates
Solution Approach 1:
The first and second arms are positioned asymmetrically relative to the longitudinal axis of the handle, with different spacing from the center. This asymmetric configuration creates a natural guide path for the blade holder during coupling, improving alignment accuracy while maintaining a compact overall handle structure.
Solution Approach 2:
The resilient member acts as an intermediary between the arms and the blade holder. It transmits and modulates the force applied to the arms, providing a cushioning effect that allows for precise coupling without requiring extremely tight tolerances on the arm positions themselves.
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 protects the coupling portion from external impact, simplifies and ensures accurate coupling, and allows for controlled ejection of the razor cartridge, extending the lifespan and enhancing user experience.
Implementation Method 1
a restoring force providing portion providing a restoring force against pivoting of the razor cartridge, wherein the restoring force providing portion provides an ejection load to the razor cartridge in a state that the razor cartridge is coupled to the razor handle in a resting state
Data Source
AI summary
A razor handle may include a first arm and a second arm which are detachably coupled to a razor cartridge including at least one blade and a connector. The first arm and the second arm may be spaced apart in a longitudinal direction and become coupled to the connector while moving away from each other and decoupled from the connector while approaching each other. The razor handle may also include a restoring force-providing part that provides a restoring force against pivoting of the razor cartridge. The restoring force-providing part may provide an ejection load to the razor cartridge in a state that the razor cartridge is coupled to the razor handle in a resting state.