Tire Sidewall Mark Structure for Visibility and Soft Light Reflection
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Solution Overview
Problem
Conventional tires with marks on the sidewall suffer from impaired visibility and suboptimal design due to uniform mark height and curved surfaces, which affect visibility and aesthetic appeal regardless of the mark's position on the tire.
Innovation Solution
A tire design featuring a mark with a curved surface portion projecting perpendicular to the surface and a flat surface portion on either side, where the flat surface's height gradually decreases in the tire circumferential direction, enhancing visibility and design by creating a contrast and smooth light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the mark height is uniform and the sidewall portion is curved in the tire radial direction, then the mark formation is simple, but the visibility of the mark is impaired depending on the position in the tire radial direction
Solution Approach 1:
The mark is divided into different surface regions with distinct geometric characteristics: a curved surface portion and flat surface portions. This local differentiation ensures that each region contributes to visibility from different angles, resolving the contradiction between simple formation and position-dependent visibility.
Solution Approach 2:
The mark transitions from a two-dimensional curved surface to a three-dimensional structure with flat surface portions that extend outward. This dimensional change creates multiple viewing angles and ensures visibility regardless of the observer's position relative to the tire.
2Ease of manufacture
If the mark has a uniform height and curved surface, then the manufacturing process is straightforward, but the design properties of the mark are insufficient
Solution Approach 1:
Different portions of the mark are given different geometric qualities: the curved surface portion provides a smooth, organic appearance while the flat surface portions create sharp, defined edges. This local quality differentiation enhances design properties without complicating the overall manufacturing process.
Solution Approach 2:
The mark incorporates asymmetric elements through the combination of curved and flat surfaces, creating visual interest and aesthetic appeal. The boundary lines between different surface portions are designed as curved lines that add artistic flair while maintaining manufacturing feasibility.
3Shape
If the flat surface portion height gradually decreases from the curved surface portion, then light reflection becomes smooth and design properties improve, but the mark structure becomes more complex
Solution Approach 1:
The transition from the curved surface portion to the flat surface portions is achieved through curved boundary lines that create smooth transitions. This curvature principle ensures smooth light reflection and aesthetic appeal while the gradual height reduction maintains structural simplicity.
Data Source
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AI summary
A tire that can achieve both desired visibility and design properties of a mark provided on a sidewall portion is provided. A tire 1 has a mark 5 provided on a surface 3a of a sidewall portion 3 so as to be raised from the surface 3a. The mark 5 includes a curved surface portion 6 curved so as to project in a direction substantially perpendicular to the surface 3a of the sidewall portion 3, and a flat surface portion 7 provided on at least one side in a tire circumferential direction of the curved surface portion 6, and a raised height h of the flat surface portion 7 from the surface 3a gradually decreases with increasing distance in the tire circumferential direction from the curved surface portion 6.