Adjustable Child Safety Harness Using Vehicle Seatbelt Routing
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Solution Overview
Problem
Conventional seatbelts designed for adults are inadequate for children due to improper fit, lack of size adjustment, and insufficient structural strength, leading to insufficient protection in vehicle accidents.
Innovation Solution
A portable, height-adjustable juvenile passenger safety harness with a single unitary piece of webbing for each shoulder strap, utilizing a 5-point buckle system and hook-and-loop fasteners for secure attachment to the vehicle seatbelt, ensuring strength and versatility across various vehicle designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional adult seatbelts are used for children, then the seatbelt structure is simple and widely available, but the fit is improper and protection is insufficient
Solution Approach 1:
The harness incorporates adjustable straps and buckles that allow dynamic adjustment to fit different child sizes, transforming the static adult seatbelt into an adaptable child restraint system
Solution Approach 2:
The harness changes key dimensional parameters (strap length, buckle position, harness width) to accommodate different child body sizes, converting the fixed-parameter adult seatbelt into a variable-parameter child restraint
2Strength
If multiple pieces of webbing are used in shoulder straps to improve flexibility, then the harness is easier to adjust, but the structural strength decreases and it becomes more prone to tearing
Solution Approach 1:
The single piece of webbing is segmented into functional zones (shoulder strap, chest strap, waist strap) that can be independently adjusted through buckles and sliders, achieving both strength and adjustability
3Ease of operation
If the harness is designed to be highly portable and easy to install, then it can be easily transported between vehicles, but it may lack the structural strength needed for accident protection
Solution Approach 1:
The harness applies different material qualities to different parts: high-strength webbing in load-bearing areas (shoulder straps, anchorage points) and easier-to-adjust materials in non-critical areas (chest straps, buckles), achieving both portability and strength
4Adaptability or versatility
If the harness uses a complex adjustment mechanism to accommodate various child sizes, then the size adaptability improves, but the device complexity increases
Solution Approach 1:
The harness uses universal adjustment mechanisms (standard buckles, sliders, and routing systems) that can accommodate various child sizes without requiring complex specialized mechanisms for each size category
Data Source
AI summary
A portable restraining passenger safety harness includes a harness body and a pair of shoulder straps. The harness body contains a left shoulder area and a right shoulder area, and the size of the safety harness can be adjusted by adjusting the height of the left and right shoulder areas. The harness is securable to a vehicle by a vehicle seat belt passing behind the child through a back panel located on a rear portion of the harness.