Elastomer Skin-Wearing Surface for Softer Low-Friction Care Contact
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Solution Overview
Problem
Existing care devices that come into contact with or are worn on the skin, such as massage and beauty treatment devices, do not provide sufficient pleasantness and relaxation effects due to inadequate touch feeling when in contact with the skin.
Innovation Solution
A care device with a skin wearing member made of elastomer having an Asker C hardness of 30 degrees or less and a coefficient of static friction of 3 or less, characterized by specific compressive stress and surface roughness values, to enhance the pleasantness when in contact with the skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional materials are used for skin contact in care devices, then device functionality is achieved, but touch pleasantness and wearing comfort are insufficient
Solution Approach 1:
The patent applies parameter changes by precisely controlling the Asker C hardness of the elastomer to 30 degrees or less and the coefficient of static friction to 3 or less. These specific parameter specifications transform the skin contact surface properties to achieve superior touch pleasantness and wearing comfort, directly resolving the contradiction between functional performance and material complexity.
Solution Approach 2:
The patent applies local quality by creating a skin contact surface with differentiated properties from the bulk elastomer material. The surface is engineered with specific hardness and friction characteristics that differ from the internal structure, optimizing the contact interface for comfort while maintaining the structural integrity and functionality of the overall device.
2Ease of operation
If elastomer with very low hardness is used to improve softness, then touch pleasantness increases, but structural support and durability may deteriorate
Solution Approach 1:
The patent resolves this contradiction by creating a local quality distinction between the skin contact surface and the bulk material. The surface layer is optimized for softness with Asker C hardness of 30 degrees or less, while the underlying elastomer structure maintains sufficient strength and structural support, allowing the device to be both comfortable and durable.
Solution Approach 2:
The patent effectively uses composite material principles by combining the elastomer base material with a specifically engineered skin contact surface. This composite structure allows different regions to have different properties - the surface provides softness and comfort while the bulk material provides structural support and durability.
Data Source
AI summary
The present disclosure provides a care device with improved pleasantness when the care device is brought into contact with and worn on the skin. The care device of the present disclosure is a care device that is brought into contact with or worn on the skin. The care device of the present disclosure includes a skin wearing member containing an elastomer. The skin wearing member has an Asker C hardness of 30 degrees or less and a coefficient of static friction of 3 or less. Here, the coefficient of static friction is a coefficient of static friction for an artificial skin sheet that satisfies the following characteristics (A) and (B). (A) A compressive stress of the artificial skin sheet at a time of being pushed in a thickness direction at a depth of 2 mm is between 0.01 MPa and 0.05 MPa inclusive. (B) Calculated average roughness Ra of a surface of the artificial skin sheet is from 5 μm to 10 μm.