Dual-Surface Insole Sandal with Strap Tongue for Versatile Footwear
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Solution Overview
Problem
The need for versatile footwear that can adapt to different activities and weather conditions without the need to carry multiple pairs of shoes, as traditional footwear is often specific to particular situations and may not account for unexpected changes in weather or activity.
Innovation Solution
An insole sandal design with a sole having two opposing surfaces, one for the foot and one for the ground, and a strap with an extended protrusion acting as a tongue when worn inside a shoe, allowing it to fit within the shoe and provide secure footing and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional footwear is designed for specific activities or weather conditions, then it provides specialized performance for that condition, but the user must carry multiple pairs of shoes for different situations
Solution Approach 1:
The insole sandal is designed to perform multiple functions: it can be worn as a standalone sandal for beach activities and as an insert inside shoes for walking or other activities. The universal design allows one footwear item to replace multiple specialized footwear options, resolving the contradiction between specialized performance and versatility
2Ease of operation
If the insole sandal includes a strap for sandal wear, then it provides secure footing as a sandal, but it may interfere with fitting inside a shoe
Solution Approach 1:
The strap is designed with a segmented structure where it can be positioned in different configurations. When worn as a sandal, the strap secures the foot properly. When inserted in a shoe, the strap can be positioned or adjusted so it does not interfere with the fit, allowing the insole sandal to adapt to both wear modes
3Ease of operation
If the insole sandal has a protrusion acting as a tongue, then it provides comfort and proper fit inside a shoe, but it adds structural complexity to the design
Solution Approach 1:
The protrusion serving as a tongue is merged with the existing strap structure of the sandal. This integration means the same component serves dual purposes: securing the foot when worn as a sandal and providing a tongue-like element for comfort and fit when worn inside a shoe, thereby reducing overall structural complexity while maintaining functionality
Data Source
AI summary
Embodiments provide an insole sandal and a shoe without a tongue. The insole sandal has a first surface configured to interface with a foot of a wearer; and a second surface configured to interface with a ground surface, and a bottom of an interior of a shoe. The insole sandal further has a strap configured to hold the insole to the foot of the wearer when the insole sandal is worn as a sandal. The first surface and the second surface are on opposite sides of one another. The insole sandal is configured to fit within the interior of the shoe. The shoe is configured to receive the insole sandal in its interior. The bottom of the insole sandal and an inner sole of the shoe may have complementary protrusions and depressions.