Pivoting Hair Clipper Head Locking Assembly for Close Shaving
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Solution Overview
Problem
Hair cutting appliances struggle to achieve both contour following and close shaving efficacy due to the blade angle requirement of approximately 20-30 degrees to the skin surface, which compromises the effectiveness of the contour following function.
Innovation Solution
A mounting assembly with a pivoting mechanism and a rotatable locking element that allows the head to be locked or freely pivoted relative to the base, enabling precise angle adjustment and stabilization for optimal shaving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the head is freely pivotable to follow contours, then contour following capability is improved, but close shaving efficacy deteriorates due to inability to maintain optimal 20-30 degree blade angle
Solution Approach 1:
The mounting assembly implements a dynamic locking system where the head can transition between a locked state (for close shaving at fixed 20-30 degree angle) and an unlocked state (for contour following). The rotatable locking element enables the head to be freely pivotable when disengaged, allowing contour adaptation, while providing a positive lock when engaged to maintain the optimal shaving angle. This dynamic state change resolves the contradiction by making the system adaptable to different operational requirements.
Solution Approach 2:
The system changes the operational parameter of head mobility from fixed to variable. By introducing a locking mechanism that can engage or disengage, the head's angular position transitions from being continuously variable (when unlocked for contour following) to being fixed at a specific angle (when locked for close shaving). This parameter change allows the system to optimize for either contour following or shaving efficacy depending on the locking state.
2Reliability
If the head is locked at a fixed angle, then close shaving efficacy is improved by maintaining optimal blade angle, but contour following capability deteriorates
Solution Approach 1:
The mounting assembly implements a dynamic locking system where the head can transition between a locked state (for close shaving at fixed 20-30 degree angle) and an unlocked state (for contour following). The rotatable locking element enables the head to be freely pivotable when disengaged, allowing contour adaptation, while providing a positive lock when engaged to maintain the optimal shaving angle. This dynamic state change resolves the contradiction by making the system adaptable to different operational requirements.
Solution Approach 2:
The system changes the operational parameter of head mobility from fixed to variable. By introducing a locking mechanism that can engage or disengage, the head's angular position transitions from being continuously variable (when unlocked for contour following) to being fixed at a specific angle (when locked for close shaving). This parameter change allows the system to optimize for either contour following or shaving efficacy depending on the locking state.
3Ease of operation
If a locking mechanism is added to fix the head angle, then device complexity increases, but user control and shaving efficiency improve
Solution Approach 1:
The locking element is designed to be operated directly by the user through simple rotation, without requiring additional actuators, motors, or complex control systems. The user can manually engage or disengage the lock by rotating the element, which directly translates to locking or unlocking the head position. This self-service approach provides full user control while minimizing the addition of complex mechanical or electronic components.
Solution Approach 2:
The rotatable locking element serves as a simple intermediary mechanism between the user's manual input and the head positioning system. By rotating this element, the user actuates the locking or unlocking of the head without needing to directly manipulate complex linkages or adjustment mechanisms. This intermediary provides an intuitive and simple interface that enhances user control while adding minimal complexity to the overall assembly.
Data Source
AI summary
According to an aspect, there is provided a mounting assembly 20 for a hair cutting appliance 10, the mounting assembly comprising: a head 24 configured to receive a cutting unit 14; a base 22 coupled to the head; a pivoting mechanism 30 coupling the base to the head, wherein the pivoting mechanism is configured to permit pivoting movement of the head relative to the base about a head pivot axis 50; and a rotatable locking element 40 configured to be rotated between: an engaged position, in which the locking element obstructs pivoting movement of the head to thereby lock the head in a locked position about the head pivot axis, and a disengaged position in which the locking element does not obstruct pivoting movement of the head such that the head is freely pivotable relative to the base about the head pivot axis; wherein the locking element is configured such that rotating the locking element to the engaged position drives the head into the locked position.