Non-slip Condom Microstructure Fit and Friction
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Solution Overview
Problem
Condoms often slip on the penis, wrinkle, or slip off during use, leading to mucosal injury, discomfort, and reduced user willingness due to inadequate fit and friction, which existing solutions have not effectively addressed.
Innovation Solution
A non-slip condom with a sleeve body featuring a primary microstructure on at least 5% of the male side, increasing the surface area to enhance contact with the penis skin, with an area ratio of 1.05 to 565.00, and optionally including a lubricant to improve fit and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the condom diameter is reduced to improve fit, then the fit is improved, but the reduced part compresses blood vessels and nerves causing difficulty in wearing
Solution Approach 1:
The patent applies local quality by creating a reduced diameter portion only at the open end of the condom (within 1/4 of the total length from the open end), while the remaining portion maintains the standard diameter. This localized modification provides the non-slip function without compressing blood vessels and nerves along the entire length of the penis, thus resolving the contradiction between fit improvement and harmful compression.
2Reliability
If rings are added at the open end to prevent slipping, then the non-slip effect is improved, but the condom becomes difficult to wear and roll up during production
Solution Approach 1:
The patent merges the slip-prevention function with the existing open end structure by creating a reduced diameter portion within the open end region. Instead of adding separate rings as independent components, the slip-prevention feature is integrated into the condom body itself through localized diameter reduction, simplifying both wearing and production processes while maintaining the non-slip effect.
3Shape
If adhesive layer is added to keep condom fit, then the fit is improved, but the adhesive causes discomfort and prevents addition of lubricant
Solution Approach 1:
The patent replaces the chemical adhesion mechanism (adhesive layer) with a mechanical friction mechanism. By reducing the diameter at the open end to create a tighter fit, the condom relies on friction and mechanical constraint to prevent slipping, rather than adhesive bonding. This eliminates the discomfort associated with adhesives while maintaining the fit, and also allows lubricant to be added without interfering with adhesion.
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 condom provides a close, non-slip fit, reduces mucosal injury, and enhances user experience by preventing slipping and easy removal, thereby improving the willingness to use condoms and preventing STDs.
Implementation Method 1
no less than 5% of a bottom surface of the male side has a primary microstructure capable of increasing a surface area; and an area ratio of a surface area per unit area of the bottom surface of the male side comprising the primary microstructure to the unit area is 1.05 to 565.00
Implementation Method 2
optionally including a lubricant to improve fit and ease of use
Data Source
AI summary
The present disclosure discloses a non-slip condom, including a sleeve body, where the sleeve body has an open end, a closed end, a male side, and a female side; no less than 5% of a bottom surface of the male side has a primary microstructure capable of increasing a surface area; and an area ratio of a total surface area per unit area of the bottom surface of the male side including the primary microstructure to the unit area is 1.05 to 565.00. The condom provided by the present disclosure can keep fit with a male penis during sexual intercourse to reduce the relative slip between the condom and the penis skin, and is not easy to wrinkle or slip off, thus reducing the mucosal injury and unreality sensation. Moreover, the condom helps to increase the consumers' willingness to use the condom and prevent sexually transmitted diseases (STDs).