Shaving Unit Supporting Structure for External Cutting Member
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Solution Overview
Problem
The existing shaving units have a complex structure with rigid holding and coupling components that make mounting and demounting of cutting units difficult due to the need for high force and rigid structures to support external pressure, leading to a cumbersome user experience.
Innovation Solution
A shaving unit design where the external cutting member is directly supported by a base portion of the housing through a supporting structure, reducing the need for rigid holding and coupling components, allowing for a simpler and easier handling of cutting units by transferring external loads directly to the housing, and enabling a snap connection with lower manual force requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rigid holding and coupling components are used to support external pressure forces, then the external cutting member is held stably during shaving, but the mounting and demounting requires high manual force and becomes difficult
Solution Approach 1:
The housing is divided into a stationary base portion and a movable cover portion that can be selectively opened and closed. The supporting structure is integrated into the base portion to provide stable support during shaving, while the cover portion can be independently opened for easy access to cutting members without requiring high manual force to overcome rigid coupling structures.
Solution Approach 2:
The cover portion is designed to be movable relative to the base portion, transitioning between open and closed positions. This dynamic design allows the housing to provide rigid support when closed during shaving, while enabling easy opening and closing for mounting and demounting operations without requiring permanent rigid coupling.
2Reliability
If rigid coupling structure is used to transfer external loads, then the structure is stable during use, but the volume of the cutting unit increases and the structure becomes more complex
Solution Approach 1:
The supporting structure is merged with the base portion of the housing, integrating the load-bearing function into the existing housing structure rather than adding separate rigid coupling components. This consolidation provides stable support during shaving while reducing overall structural complexity and volume.
Solution Approach 2:
The design uses a movable cover portion that transitions between positions, allowing the structure to be compact when closed for stable shaving performance, while enabling easy access when opened. This dynamic configuration eliminates the need for bulky rigid coupling structures that would be required for permanent fixed connections.
3Strength
If rigid holding component is used to support external cutting member, then the cutting member is held firmly, but the manual force required for demounting increases
Solution Approach 1:
The housing is segmented into a stationary base portion containing the supporting structure and a movable cover portion. The cutting members are held firmly by the supporting structure in the base portion during shaving, while the cover portion can be independently opened with minimal force to enable easy demounting of cutting members without requiring high manual force to overcome rigid holding structures.
Solution Approach 2:
The movable cover portion acts as an intermediary between the user and the cutting members. It provides easy access for mounting and demounting operations while the supporting structure in the base portion maintains firm holding of the cutting members during shaving, separating the functions of easy access and firm holding.
Data Source
AI summary
A shaving unit for a shaving apparatus has at least two cutting units each including an external cutting member having hair entry openings and an internal cutting member which is rotatable relative to the external cutting member about an axis of rotation. Each cutting unit has a housing accommodating a hair collection chamber. A cover portion of the housing is releasably coupled to a base portion. The external and internal cutting members are held in an operating position in the cover portion by a holding component which is releasably coupled to the cover portion. The base portion of the housing of each cutting unit has a supporting structure where, in the closed position of the housing, the external cutting member is directly supported by the supporting structure at least in an axial direction parallel to the axis of rotation.