Chevron Rib Podo-Tactile Pad Anti-Slip Design
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Solution Overview
Problem
Existing podo-tactile pads for visually impaired pedestrians lack sufficient non-slip properties, posing a risk of falls and loss of balance.
Innovation Solution
The podo-tactile pad features a circular surface with multiple series of chevron-shaped ribs regularly distributed over the periphery, providing enhanced anti-slip capacity by increasing the surface coverage with ribs, with each rib part forming a 90° angle and having a triangular shape in cross-section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional non-slip ribs are used on the podo-tactile pad, then some anti-slip capability is provided, but the anti-slip performance is insufficient and pedestrians still risk falls and loss of balance
Solution Approach 1:
The rib structure is segmented into multiple series (2-6 series, preferably 4 series) of chevron-shaped ribs distributed over the periphery of the circular surface. Each series contains multiple individual ribs, creating a segmented pattern that increases surface coverage and multiplies the anti-slip effect compared to conventional single-rib designs.
Solution Approach 2:
The chevron-shaped ribs are strategically positioned with their points directed toward the central zone of the circular surface, creating localized high-friction zones where pedestrians need maximum grip. The ribs form approximately 90° angles between parts, optimizing the local geometry for preventing forward and lateral slips.
Solution Approach 3:
The rib design transitions from simple linear ribs to three-dimensional chevron shapes with specific angular geometry (approximately 90° between rib parts). This dimensional complexity creates interlocking effects with shoe soles and increases the effective friction surface area, markedly improving anti-slip capacity.
2Reliability
If the circular surface is fully covered with ribs, then maximum anti-slip capacity is achieved, but the manufacturing complexity increases
Solution Approach 1:
The chevron-shaped rib design serves multiple functions simultaneously: it provides anti-slip traction, maintains structural integrity of the pad, and creates tactile feedback for visually impaired pedestrians. This multi-functionality reduces the need for additional components, simplifying manufacturing despite the complex rib pattern.
Solution Approach 2:
The rib parameters (chevron shape, 90° angle, point direction toward center, spacing of approximately 1 mm, height of approximately 0.5 mm, width of approximately 1 mm) are optimized to achieve maximum anti-slip effect with standardized dimensions that can be manufactured using conventional molding or machining processes, balancing performance with manufacturing ease.
Data Source
Figure 1~5
AI summary
The button (1) has a surface (3) provided with plate ribs (4) in a projected manner and constituting of anti-skid elements, where the plate ribs are arranged in a set of series of ribs(5) evenly spaced around periphery of the surface. Each rib is formed in chevron shape with point directed to a central area of the surface. The series of ribs is adjacent to each other, so that assembly of an upper surface of the surface is covered by the ribs.