Layered Headrest Buffering for Lightweight Child Safety Seats
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Solution Overview
Problem
Existing child safety seats are heavy and costly due to extensive buffer structures, which compromise their weight and manufacturing efficiency while aiming to provide adequate protection and comfort.
Innovation Solution
A child safety seat design featuring a first buffer along the inner side wall of the headrest and a second buffer at the shoulder position, utilizing foamed materials with varying hardness to ensure protection while minimizing weight and production costs, by omitting buffer structures at other positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large area of seat buffering foam is provided to ensure comfort and safety, then the protection performance is improved, but the weight and manufacturing cost increase
Solution Approach 1:
The buffer structure is divided into multiple buffer layers with different hardness values. The first buffer layer has a first hardness value, the second buffer layer has a second hardness value less than the first, and the third buffer layer has a third hardness value less than the second. This segmentation allows each layer to perform different protective functions, reducing the need for extensive single-layer foam while maintaining protection performance.
Solution Approach 2:
Different buffer layers are positioned at specific locations within the headrest assembly. The first buffer layer is adjacent to the inner side wall of the headrest, the second buffer layer is adjacent to the first buffer layer, and the third buffer layer is adjacent to the second buffer layer. This local quality distribution ensures protection where needed while reducing overall material usage and weight.
2Reliability
If a large area of seat buffering foam is provided to ensure comfort and safety, then the protection performance is improved, but the manufacturing cost increases
Solution Approach 1:
The buffer structure is divided into multiple buffer layers with different hardness values. The first buffer layer has a first hardness value, the second buffer layer has a second hardness value less than the first, and the third buffer layer has a third hardness value less than the second. This segmentation allows each layer to perform different protective functions, reducing the need for extensive single-layer foam while maintaining protection performance.
Solution Approach 2:
The patent uses composite buffer structure with multiple layers of different materials or material densities. The first buffer layer, second buffer layer, and third buffer layer are made with different hardness characteristics, creating a composite structure that provides enhanced protection performance while using less total material, thereby reducing manufacturing cost.
3Reliability
If buffer structures are provided at all positions to ensure comprehensive protection, then the safety performance is improved, but the device complexity increases
Solution Approach 1:
The buffer structure is divided into three distinct buffer layers with different hardness values, each positioned at specific locations within the headrest. This segmentation provides comprehensive protection through a structured approach rather than uniform coverage, maintaining safety performance while organizing complexity in a manageable way.
Solution Approach 2:
Different buffer layers are positioned at specific locations within the headrest assembly. The first buffer layer is adjacent to the inner side wall of the headrest, the second buffer layer is adjacent to the first buffer layer, and the third buffer layer is adjacent to the second buffer layer. This local quality distribution ensures protection where needed while reducing overall material usage and weight.
Data Source
AI summary
The present disclosure provides a child safety seat including a seat body, a headrest and a first buffer. The seat body has two seat side wings which are oppositely disposed. The first buffer is disposed along an inner side wall of the headrest, and the first buffer includes at least one first buffer layer and at least one second buffer layer. A hardness of the second buffer layer is less than that of the first buffer layer. The second buffer layer is fixed on a side of the first buffer layer and adjacent to the inner side wall of the headrest, and the first buffer layer is located at a side away from the inner side wall of the headrest. The child safety seat of the present disclosure has a good protective effect on infants, and can reduce the weight and manufacturing cost of the child safety seat.