Three-Point Shoe Attachment for Roller Skate Stability
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Solution Overview
Problem
Roller skate systems with two small contact points are unstable and prone to tipping under lateral forces, and replacing components is difficult without specialized assistance, affecting power transmission and stability.
Innovation Solution
A roller skate system with a shoe and rail featuring a three-point attachment system, where the fastening devices are arranged in a triangular configuration with offset positions, and the rail has a channel for rollers with wing sections for improved stability and power transmission, allowing for easy adaptation and component replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two small contact points are used to connect the skate to the frame, then the device complexity is reduced, but the stability deteriorates and the roller skate system easily tips over under lateral forces
Solution Approach 1:
The connection system is segmented into three separate fastening devices positioned at different locations (first fastening device at the front, second and third fastening devices at the rear on opposite sides). This segmentation creates a triangular connection pattern that distributes lateral forces across multiple points, preventing the roller skate from tipping over while maintaining relatively simple individual connection points.
Solution Approach 2:
The connection system transitions from a linear arrangement (one behind the other) to a two-dimensional triangular arrangement. The fastening devices are positioned at vertices of a triangle, creating a stable geometric structure that resists lateral forces in multiple directions. This dimensional change from 1D to 2D arrangement fundamentally improves stability without significantly increasing complexity.
2Device complexity
If mounting points are arranged one behind the other, then the device complexity is reduced, but the stability deteriorates and power transmission is insufficient
Solution Approach 1:
The power transmission function is segmented across three separate fastening devices positioned at optimal locations on the shoe. The first fastening device at the front and the second and third fastening devices at the rear create multiple force transmission paths from the shoe to the frame, enabling more effective transfer of propulsive forces during skating compared to a single linear mounting arrangement.
Solution Approach 2:
The mounting points are arranged in a two-dimensional triangular pattern rather than a one-dimensional line. This triangular configuration provides better leverage and force distribution, improving the mechanical advantage of the connection system and enhancing power transmission from the skater's foot through the shoe to the frame and wheels.
3Adaptability or versatility
If individual components need to be replaced, then the adaptability is improved, but the ease of operation deteriorates as it requires a specialist retailer and is a relatively complex process
Solution Approach 1:
The roller skate system is segmented into separable components (shoe, frame, wheels) connected by standardized fastening devices. Each component can be independently removed and replaced by simply undoing the corresponding fastening screws, enabling users to replace individual components without requiring specialized tools or expertise. The modular design with discrete fastening points makes component replacement straightforward and accessible to ordinary users.
4Manufacturing precision
If the center of gravity is higher, then the manufacturing precision is reduced, but the ease of operation deteriorates as more effort is required to maintain balance
Solution Approach 1:
The fastening system uses a two-dimensional triangular arrangement of fastening devices that allows the frame to be positioned lower relative to the shoe, thereby lowering the overall center of gravity of the roller skate system. The triangular geometry provides a stable base that naturally positions components for optimal balance, reducing the effort required to maintain stability during skating.
Data Source
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AI summary
The invention relates to a shoe (100) for a roller skate system (300), comprising a three-point securing system for securing the shoe (100) to a rail (200), said securing system having three securing devices (101-1, 101-2, 101-3), wherein the first securing device (101-1) is arranged in a central position in the heel region (111) of the shoe (100), the second securing device (101-2) is arranged on an outer side in the ball region (113) of the shoe (100), and the third securing device (101-3) is arranged on an inner side in the ball region (113) of the shoe (100). The invention also relates to a rail (200) that can be mounted on the shoe.