Adjustable Comb Attachment With Rack-and-Pinion Length Locking
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Solution Overview
Problem
Existing blade systems for cutting hair, such as razors and beard trimmers, face limitations with single adjustable combs that are either bulky or require attachment to both the handle and blade, resulting in reduced degrees of freedom in movement.
Innovation Solution
A comb attachment featuring a rack component and pinion assembly with a locking mechanism, allowing for adjustable cutting length by rotating the pinion, which induces linear movement between the comb and housing, while maintaining freedom of movement with the blade system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single comb is used to adjust cutting length, then cutting length variability is improved, but device complexity and bulkiness increase
Solution Approach 1:
The comb is divided into multiple independent combs, each with a specific cutting length setting. Instead of using a single adjustable comb that requires complex mechanisms, the invention provides multiple simple combs that can be quickly swapped. This segmentation allows cutting length variability while keeping each individual comb simple in structure.
Solution Approach 2:
The comb attachment system allows dynamic switching between different combs during use. The quick-release mechanism enables users to change combs on the fly, providing adaptability in cutting length without requiring complex adjustment mechanisms within a single comb.
2Adaptability or versatility
If a single adjustable comb is used, then cutting length adaptability is improved, but ease of operation deteriorates due to attachment requirements
Solution Approach 1:
The system separates the comb attachment function from the handle, allowing combs to attach only to the blade assembly. This segmentation simplifies the operation by eliminating the need to attach combs to multiple components, making the process faster and easier.
Solution Approach 2:
The comb attachment mechanism is extracted from the handle and placed solely on the blade assembly. This extraction simplifies the overall operation by reducing the number of attachment steps required, as combs only need to attach to the blade rather than both the handle and blade.
3Adaptability or versatility
If a single adjustable comb is used, then cutting length variability is improved, but reliability deteriorates due to loss of degrees of freedom
Solution Approach 1:
The comb attachment is segmented to connect only to the blade assembly, not the handle. This segmentation preserves the handle's degrees of freedom and movement flexibility while still providing cutting length variability through comb selection. The blade assembly independently carries the comb attachment function.
Solution Approach 2:
The comb attachment function is extracted from the handle system and placed solely on the blade assembly. This extraction ensures that the handle maintains full mobility and degrees of freedom, while the blade assembly handles the comb attachment, thus preserving system reliability and movement freedom.
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 precise and stable adjustment of cutting length without compromising the degrees of freedom in the blade system's movement, ensuring accurate hair cutting and ease of use.
Implementation Method 1
a rack component and a pinion assembly, the rack component defined by one of a comb and a housing and comprising a rack, the housing being configured to attach to the blade system, and the pinion assembly comprising a pinion component defined by the other of the comb and the housing
Implementation Method 2
the pinion is biased away from the rack and towards the locked position, such that pushing the pinion towards the rack and the unlocked position causes disengagement of the notch and protrusion to permit rotation of the pinion
Data Source
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AI summary
According to an aspect, there is provided a comb attachment for a blade system, the comb attachment comprising a rack component and a pinion assembly. The rack component is defined by one of a comb and a housing and comprises a rack. The housing is configured to attach to the blade system, and the pinion assembly comprises a pinion component defined by the other of the comb and the housing. The pinion assembly further comprises an axle retained by the pinion component, and a pinion disposed on the axle such that the pinion is rotatable with respect to the pinion component. The rack and the pinion are arranged to cooperate such that rotation of the pinion on the axle induces relative linear movement between the comb and the housing. The comb attachment comprises a locking mechanism configured to rotationally lock the pinion, comprising a protrusion on one of the pinion and the pinion component, and a notch on the other of the pinion and the pinion component, the protrusion and notch being configured to engage to lock the pinion to thereby prevent relative linear movement between the comb and the housing. The pinion is moveable between a locked position, in which the protrusion and the notch are engaged, and an unlocked position, in which the protrusion and the notch are disengaged. The pinion is biased away from the rack and towards the locked position, such that pushing the pinion towards the rack and the unlocked position causes disengagement of the notch and protrusion to permit rotation of the pinion.