Roller Skate Base Composite Skeleton and Reinforcing Shell
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Solution Overview
Problem
Conventional roller skate bases made of metal materials are prone to brittle fracture and material fatigue, leading to gaps and potential breakage due to their hard and brittle nature, especially under impact and long-term usage.
Innovation Solution
A base for roller skates comprising a metal skeleton with hollow areas and a reinforcing shell made of a different material, such as plastic, which is injected molded onto the skeleton, providing cushioning and protection against impact and improving assembly stability through inlaid structures and a sandblasted surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the base is made of metal material, then the strength is high, but the base is prone to brittle fracture and material fatigue
Solution Approach 1:
The base combines metal skeleton (first material) with plastic shell (second material) to create a composite structure. The metal skeleton provides high strength and structural support, while the plastic shell provides toughness and impact resistance, eliminating the brittle fracture problem of pure metal bases.
Solution Approach 2:
Different parts of the base use different materials optimized for their specific functions: the skeleton uses metal for structural strength where load-bearing is critical, while the outer shell uses plastic for impact absorption and toughness where resistance to brittle fracture is needed.
2Strength
If the base is made of metal material, then the strength is high, but the base is prone to formation of gaps and breakage after long-term usage
Solution Approach 1:
The composite structure of metal skeleton and plastic shell combines the advantages of both materials: metal provides long-term structural stability while plastic provides fatigue resistance and prevents gap formation, significantly extending the service life of the base.
Solution Approach 2:
The plastic shell acts as a protective cushion that absorbs impact forces before they reach the metal skeleton, preventing fatigue damage and gap formation in the metal parts during long-term usage.
3Ease of manufacture
If the base is made of single material, then the manufacturing is simple, but the base is prone to brittle fracture under impact
Solution Approach 1:
The base uses composite materials (metal skeleton + plastic shell) where the metal skeleton is manufactured first through conventional processes, then the plastic shell is injection molded over it. This maintains manufacturing simplicity while dramatically improving impact resistance through the tough plastic outer layer.
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 solution effectively reduces the risk of brittle fracture and enhances the durability of the roller skate base by distributing impact forces and improving material toughness, while also enhancing aesthetics and assembly stability.
Implementation Method 1
The reinforcing shell is directly disposed on the skeleton by injection molding with a second material
Implementation Method 2
a surface of the skeleton includes a sandblasting processed layer
Data Source
AI summary
A base for roller skates includes a skeleton and a reinforcing shell. The skeleton is made of a first material through one-time processing and is formed with a plurality of hollow areas. The reinforcing shell includes a plurality of inlaid structures respectively embedded in the hollow areas is directly disposed on the skeleton by injection molding with a second material. The second material is different from the first material. Two roller frame mounting hole sets on the base for roller skates are directly formed by the skeleton, and a brake block mounting hole and a treading platform on the base for roller skates are formed by the reinforcing shell. The base for roller skates is not made of single metal material like prior arts, making it capable of reducing fracture due to the hard and brittle characteristics of the material used in prior art.