Hair Root Applicator with Segmented Comb Teeth
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Solution Overview
Problem
Existing hair cosmetic applicators find it difficult to uniformly and evenly dye undyed hair-root sections, especially those that are not easily visible such as the top and back of the head, due to the challenge of reaching these areas with precision and applying the dye effectively.
Innovation Solution
A hair-root applicator featuring comb teeth with a comb-tooth body part of higher rigidity and a tip-end elastically deformable part made of soft resin, which includes a liquid introduction path and discharge port positioned to facilitate the application of hair dye directly to the hair roots, allowing for flexible deformation and improved accessibility to hard-to-reach areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the comb teeth are made of rigid material to maintain shape and combing function, then the combing capability is improved, but the ability to reach and adapt to hard-to-access hair-root areas deteriorates
Solution Approach 1:
The comb tooth is divided into two functional segments: a rigid comb-tooth body part for maintaining shape and combing function, and a flexible tip-end elastically deformable part for adapting to scalp contours and reaching hard-to-access areas. This segmentation allows each part to optimize its specific function without compromising the other.
Solution Approach 2:
Different parts of the comb tooth have different mechanical properties: the body part has high rigidity for structural integrity and combing, while the tip-end part has low rigidity (high elasticity) for conforming to scalp surface irregularities and accessing difficult areas. This local differentiation of material properties resolves the contradiction between rigidity and flexibility requirements.
2Measurement precision
If the discharge port is positioned at the tip of the comb tooth to apply dye directly to hair roots, then the dyeing precision is improved, but the structural complexity increases
Solution Approach 1:
The discharge port function is merged with the tip-end elastically deformable part. The coating agent is supplied through the flexible tip-end portion itself, combining the application mechanism with the adapting structure, thereby achieving precise dye application without adding separate complex delivery mechanisms.
Solution Approach 2:
The tip-end elastically deformable part serves as an intermediary between the rigid comb-tooth body and the scalp surface. It transmits the coating agent from the liquid introduction path to the target area while adapting to surface irregularities, enabling precise application without requiring complex positioning mechanisms.
3Object-affected harmful factors
If the comb tooth tip is made soft to feel pleasant on the scalp, then the user comfort is improved, but the combing effectiveness deteriorates
Solution Approach 1:
The comb tooth is segmented into a rigid body part that performs the combing function effectively and a soft flexible tip-end part that contacts the scalp. This segmentation allows the soft tip to provide comfort and prevent irritation while the rigid body maintains combing effectiveness.
Solution Approach 2:
The comb tooth exhibits local quality differentiation: the body part has high rigidity for effective combing and hair manipulation, while the tip-end part has soft, elastic properties for comfortable scalp contact and preventing irritation. Each local region is optimized for its specific function.
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 hair-root applicator enables efficient and stable application of hair dye to hair-root sections close to the scalp, even in areas difficult to see, ensuring uniform dyeing and a pleasant feel without causing scalp irritation.
Implementation Method 1
a tip-end elastically deformable part that is provided contiguously to a tip end of the comb-tooth body part and that is made of a soft resin
Data Source
AI summary
A hair-root applicator (10) of the present invention includes: a comb-teeth part (13) in which a plurality of comb teeth (12) are erected from a surface of a comb-teeth base (14); and a container (11) for containing a hair dye as a coating agent. This hair-root applicator is an applicator capable of applying, to hair-root sections of the hair, the hair dye supplied from the container (11) to the comb teeth (12). Each comb tooth (12) includes a comb-tooth body part (15) having a function of combing the hair, and a tip-end elastically deformable part (16) that is provided contiguously to the tip end of the comb-tooth body part (15) and that is made of a soft resin. A liquid introduction path (17) for the coating agent is provided inside the comb-tooth body part (15). A discharge port (17a) of the liquid introduction path (17) is opened so as to be arranged in the vicinity of the tip-end elastically deformable part (16).