Fibre-Reinforced Car Seat Slider for Low-Noise Load Stability
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Solution Overview
Problem
Existing car seat sliders made of metal rails are heavy, difficult to handle, and noisy, with assembly and manufacturing processes being complex, while those made of thermoplastic materials lack sufficient stability under heavy stress.
Innovation Solution
A slider for car seat support made of fibre reinforced polyamide, featuring a base and upper portion connected by a constricted portion, with guide protrusions, a rounded groove, and metal sleeves in through-openings for enhanced stability and reduced friction, allowing easier handling and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal rails are used for sliders, then strength and stability are improved, but weight and difficulty of handling increase
Solution Approach 1:
The slider is made from fibre-reinforced polyamide composite material, combining the strength characteristics of metal with the weight advantages of polymers. The fibre reinforcement (glass or carbon fibres) provides enhanced mechanical properties while the polyamide matrix offers lightweight construction, resolving the contradiction between strength and weight.
Solution Approach 2:
The invention changes the material parameters from traditional metal to fibre-reinforced polymer, fundamentally altering the density and strength-to-weight ratio. This parameter change enables achieving comparable strength with significantly reduced weight, addressing the contradiction between these two properties.
2Stability of the object's composition
If metal rails are used for sliders, then stability under stress is improved, but noise generation increases
Solution Approach 1:
Changing from metal to fibre-reinforced polymer material fundamentally alters the damping characteristics and noise generation parameters. The polymer matrix provides inherent vibration damping and noise reduction while the fibre reinforcement maintains structural stability, resolving the contradiction between stability and noise.
3Weight of moving object
If thermoplastic materials are used for sliders, then weight and ease of handling are improved, but stability under heavy stress deteriorates
Solution Approach 1:
The use of fibre-reinforced polyamide creates a composite material that overcomes the limitations of plain thermoplastics. The fibre reinforcement (5-50% by weight) provides the necessary stiffness and stability under heavy stress, while the polyamide matrix maintains the lightweight advantage, resolving the contradiction between weight and stability.
4Weight of moving object
If fibre reinforced polyamide is used for sliders, then weight and ease of assembly are improved, but manufacturing precision may deteriorate
Solution Approach 1:
The invention replaces complex mechanical assembly systems with integrated injection-molded components. The slider is manufactured as a single integrated piece through injection molding, eliminating the need for separate assembly steps and fasteners, thereby achieving both weight reduction and maintained manufacturing precision.
Data Source
AI summary
Slider (1) for a car seat support which can be locked in different positions along a sliding direction (25), to be mounted in a metal rail (2), wherein the slider (1) has an extended base portion (3) and an extended upper portion (4). The base portion (3) and the upper portion (4) are connected by a constricted portion (13). The base portion (3) has two lateral guide portions (5,5′) with guide protrusions (6,6′) pointing upward in the direction of the upper portion (4) and forming, with the constricted portion (13), a groove (12) on each side. The slider may (1) essentially consist of fibre reinforced polyamide.