Hair Cutter Coupling Structure for Upside-Down Assembly
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Solution Overview
Problem
Existing hair cutting units and shaving units require users to manually hold the supporting member upside-down and couple retaining components while the external cutting members are protruding, making assembly inconvenient, especially when starting from a flat surface.
Innovation Solution
The first and second guiding members of the coupling structure are configured to allow the external cutting member to move between retaining members parallel to the axis of rotation over the exposure distance in the first angular position, enabling assembly with the supporting member upside-down on a flat surface by guiding the retaining component into position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the external cutting member is retained in a protruding position during assembly, then the retaining component can be coupled to the supporting member, but the user must manually hold the supporting member upside-down, making assembly inconvenient
Solution Approach 1:
The guiding members are pre-configured with guiding surfaces that automatically guide the external cutting member from a recessed position to a protruding position during the assembly process. This preliminary configuration of the guiding structure enables the cutting member to move to the correct position without requiring the user to manually hold the supporting member upside-down, thus resolving the contradiction between assembly feasibility and handling convenience
2Ease of operation
If the supporting member is placed upside-down on a flat surface during assembly, then handling is easier, but the external cutting member cannot be retained in the protruding position required for coupling
Solution Approach 1:
The coupling structure incorporates guiding members with guiding surfaces that enable dynamic movement of the external cutting member during assembly. When the supporting member is placed upside-down on a flat surface, the guiding surfaces allow the external cutting member to be pushed or guided into the protruding position through the retaining component, making both the recessed and protruding positions accessible during assembly and thus resolving the contradiction between handling convenience and assembly feasibility
Data Source
AI summary
A hair cutter of a shaving device has a support with a skin contacting surface, and a retainer releasably couplable to the support by a coupler to retain an external cutter in an operational/assembled condition of the hair cutter. A retained element of the external cutter is retained between a first retaining member of the retainer and a second retaining member of the support where, in response to manually turning the retainer relative to the support, the shaving surface protrudes relative to the skin contacting surface in the axial direction over an exposure distance. The coupler has a first guide on the support and a second guide on the retainer. The first and second guides mutually engage resulting from manually turning the retainer relative to the support when the retainer is in any angular position between first and second angular positions about the axis of rotation relative to the support.