Dual-Layer Handrail Assembly for Child Carrier Safety
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Solution Overview
Problem
Traditional baby carrier handrails have protective sleeves that are easily damaged by children's biting or pulling, leading to exposure of filling materials, which can be hazardous, and the assembly process is labor-intensive and inefficient with poor fitting between the sleeve and handrail.
Innovation Solution
A handrail assembly with a dual-layer protective system, where a flexible first layer is covered by a wear-resistant, anti-biting second layer made of leather, and a manufacturing method involving hot-melt adhesive layers for efficient assembly, ensuring the first layer is fully enclosed and securely attached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single flexible protective sleeve is used on the handrail, then the buffering function is provided, but the protective sleeve is easily broken by child's biting or pulling, causing filling exposure and safety hazards
Solution Approach 1:
The patent applies composite materials by combining an inner protective sleeve made of flexible material (providing buffering function) with an outer protective layer made of bite-resistant material (providing anti-biting strength). This composite structure resolves the contradiction by allowing each layer to perform its specialized function while working together as a unified protective system.
Solution Approach 2:
The protective structure is segmented into multiple functional layers: an inner sleeve for buffering and an outer layer for bite resistance. This segmentation allows each component to be optimized for its specific purpose, with the inner layer providing flexibility and the outer layer providing durability against biting and pulling forces.
2Ease of manufacture
If traditional adhesive assembly method is used for the protective sleeve, then the assembly can be completed, but it takes a long time for glue solidification and requires one person to process one handrail at a time, consuming labor and working-hours
Solution Approach 1:
The patent replaces the traditional chemical bonding method (adhesive) with a mechanical fastening system using clips or fasteners. This substitution eliminates the waiting time for glue solidification and allows for quicker assembly operations, thereby improving productivity while maintaining ease of manufacture through simple mechanical components.
Solution Approach 2:
The protective sleeve and outer protective layer are pre-assembled or pre-positioned with fastening elements before final installation on the handrail. This preliminary action allows for preparation of components in advance, reducing on-site assembly time and enabling parallel processing of multiple handrails simultaneously.
3Ease of manufacture
If traditional adhesive assembly method is used for the protective sleeve, then the assembly can be completed, but the protective sleeve and handrail tube may not be tightly fitted, presenting uneven wrinkles that affect overall aesthetics
Solution Approach 1:
By replacing adhesive bonding with mechanical fastening using clips or fasteners, the system provides precise positioning and uniform distribution of the protective sleeve along the handrail tube. This mechanical approach ensures consistent spacing and tight fitting without the uneven wrinkles that can occur with adhesive methods, thereby improving manufacturing precision while maintaining ease of manufacture.
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 dual-layer system effectively prevents filling material exposure, enhancing child safety and aesthetics while simplifying the assembly process, allowing for mass production with improved fitting and durability.
Implementation Method 1
a manufacturing method involving hot-melt adhesive layers for efficient assembly
Data Source
AI summary
A handrail assembly, a manufacturing method for the handrail assembly, a support frame structure having the handrail assembly, and a child carrier. The handrail assembly comprises a handrail body, wherein the handrail body is covered with a first protective layer of a flexible structure, the first protective layer is covered with a second protective layer, the second protective layer shields the first protective layer to prevent the first protective layer from being exposed to the outside. The support frame structure comprises a front support assembly, a rear support assembly, a push rod assembly, a connecting assembly and a handrail assembly, a connecting portion of the handrail assembly being detachably connected to the connecting assembly. The handrail assembly can prevent the first protective layer from being exposed to the outside, and prevent children from accidentally swallowing the filling of the first protective layer, thereby guaranteeing the life safety of children.