Razor Blade Cartridge Ejection via Rear Manipulation Opening
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Solution Overview
Problem
Existing razors with detachable blade cartridges face difficulties in applying a sufficient pushing force to the manipulation portion for easy ejection, often requiring two-stage manipulation due to the exposure of the manipulation portion adjacent to the blade base or requiring a different directional press.
Innovation Solution
A razor design featuring a socket portion with an insertion/ejection opening and a manipulation opening, where the coupler projection includes a guide portion with a cantilever spring support and a manipulation portion that can be easily pushed in the ejection direction, allowing for single-stage removal of the blade cartridge with enhanced force application through an inclined pusher surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the manipulation portion is exposed at a position adjacent to the blade base in the outer periphery of the coupler projection, then the blade cartridge can be detachably coupled to the holder, but it becomes difficult to apply a sufficient pushing force to the manipulation portion for ejection
Solution Approach 1:
The manipulation opening is formed at the rear surface of the holder, providing a different spatial dimension for accessing the manipulation portion. This allows the user to push the manipulation portion from the rear direction, enabling sufficient force application that was not possible when the manipulation portion was only accessible from the side adjacent to the blade base.
2Ease of operation
If a manipulation opening is added to expose the manipulation portion, then the manipulation portion can be accessed, but two-stage manipulation is required (pressing down first, then moving in ejection direction)
Solution Approach 1:
The coupler projection is segmented into functional portions: the guide portion for engagement, the support portion with cantilever spring for elastic deformation, and the manipulation portion for user interaction. This segmentation allows the manipulation portion to be independently accessed through the manipulation opening and directly pushed in the ejection direction without requiring preliminary pressing actions.
Solution Approach 2:
The support portion is designed with elastic properties (cantilever spring) that allow it to deform under the pushing force applied to the manipulation portion. This elastic deformation parameter change enables the coupling to be released with a simple push action, eliminating the need for two-stage manipulation.
3Ease of operation
If the manipulation portion is not easily accessible for pushing, then the coupling structure remains compact, but the blade cartridge removal becomes difficult
Solution Approach 1:
The manipulation portion is extracted and exposed through the manipulation opening formed in the rear surface of the holder. This allows the manipulation portion to be accessed and pushed from the rear direction, enabling easy removal of the blade cartridge without complicating the overall holder structure.
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
Enables easy and single-stage removal of the blade cartridge by allowing the manipulation portion to receive a pushing force directly, improving the ease of detachment and simplifying the ejection process.
Implementation Method 1
The support portion is constituted by a cantilever spring having an elasticity and has a manipulation portion and an engagement portion both located at a distal end of the support portion
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A razor blade cartridge (13) is detachably attached to a holder (1). A socket portion (7), which includes an insertion/ejection opening (10) and a manipulation opening (11), is provided to the holder (1). A coupler projection (16), which detachably attaches to the socket portion (7) of the holder (1) through the insertion/ejection opening (10) of the socket portion (7), is provided to the blade cartridge (13). A guide portion (18), which extends towards the opposite side from the skin contacting surface of the blade cartridge (13) and is supported by the socket portion (7) of the holder (1), is provided to the coupler projection (16) of the blade cartridge (13). The end of the guide portion (18) is provided with a manipulation portion (20), which is manipulated at the manipulation opening (11) of the socket portion (7) to release the guide portion (18) from the socket portion (7) and the manipulation of which removes the blade cartridge (13) from the insertion/ejection opening (10) of the socket portion (7). Thus, the blade cartridge (13) can be easily removed by a gentle application of pressure on the manipulation portion (20).