Adjustable Cosmetic Dispenser with Dynamic Bristle Length Control
Solution Overview
Problem
Existing cosmetic composition dispensers lack the ability to dynamically adjust the length of protrusions or bristles for optimal application on varying hair lengths and types, leading to inefficient hair coloration and treatment delivery.
Innovation Solution
A composition dispenser with a double twist or threaded configuration allows for axial linear travel perpendicular to a rotation plane, enabling users to adjust the exposed length of protrusions or bristles for precise application, accommodating different hair lengths and types by rotating the length-adjustment element, which is coupled with a protrusion unit having bristles or tines for fluidic communication with a formulation reservoir.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-length bristle applicator is used, then the device structure is simple, but it cannot accommodate varying hair lengths and types for optimal application
Solution Approach 1:
The patent implements a dynamic adjustment mechanism where the bristle length can be changed by rotating the applicator head relative to the handle. This allows the applicator to adapt to different hair lengths and types while maintaining a relatively simple overall structure through the use of a rotational adjustment mechanism rather than multiple fixed applicators.
Solution Approach 2:
The adjustable bristle assembly is nested within the applicator head, with the bristles contained within a housing that allows for length adjustment. This nesting approach maintains compactness while enabling variable bristle exposure lengths to match different hair lengths.
2Length of moving object
If the bristle length is increased to reach longer hair, then coverage is improved, but precision and control for shorter hair is lost
Solution Approach 1:
The rotational adjustment mechanism enables dynamic changing of bristle length, allowing users to precisely set the bristle length appropriate for their specific hair length. This dynamic adjustment restores precision for shorter hair while maintaining the capability for longer hair coverage.
Solution Approach 2:
The patent changes the physical parameter of bristle length to match different application requirements. By allowing continuous or discrete adjustment of this parameter, the applicator can optimize the bristle length parameter for precision work on short hair or coverage on long hair as needed.
3Manufacturing precision
If the bristle length is decreased for precision on short hair, then application control is improved, but coverage and reach for long hair is reduced
Solution Approach 1:
The adjustable mechanism allows the user to dynamically change bristle length based on the specific application task. For precision work on short hair, the bristles are retracted; for coverage on long hair, the bristles are extended, thus resolving the trade-off between precision and coverage area.
Solution Approach 2:
The single applicator head performs multiple functions by adjusting bristle length - it can serve as both a precision applicator for short hair and a coverage applicator for long hair, eliminating the need for multiple specialized tools and maximizing both precision and coverage capabilities.
4Ease of manufacture
If a single fixed applicator design is used, then manufacturing cost is low, but multiple applicators are needed for different hair types
Solution Approach 1:
The patent creates a universal applicator head that can function with different bristle length configurations to accommodate various hair types and lengths. This multi-functionality is achieved through the rotational adjustment mechanism, allowing one applicator design to replace multiple fixed-length applicators while maintaining manufacturing efficiency.
Solution Approach 2:
The adjustable bristle assembly is nested within the applicator head housing, allowing a single compact unit to provide multiple bristle length options. This nesting design maintains manufacturing simplicity while achieving versatility across different hair types.
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
The adjustable dispenser ensures accurate, clean, and precise delivery of hair color or treatment formulations by customizing the bristle or tine length to match the hair, improving application efficiency and uniformity across different hair lengths and types.
Implementation Method 1
the length-adjustment element comprises a twist top and a threaded insert comprising a top flange having a central opening and an outer and an inner threaded surface
Data Source
AI summary
A composition dispenser with dynamically adjustable protrusions/bristles for delivery of a cosmetic composition to a substrate, particularly hair coloring agents. The composition dispenser comprises a protrusion unit including one or more protrusion elements and at least one dispensing orifices appointed for fluidic communication with a formulation reservoir. The protrusion unit is operably coupled to a length-adjustment element configured to adjust an exposed protrusion length of the protrusion elements along a direction perpendicular to a rotation plane of the length-adjust element.