Rotary Buckle Socket Distributes Harness Strap Stress
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Solution Overview
Problem
Current child restrain harness buckles concentrate stress in a limited area of the strap fasteners due to the gathering of harness strap ends, leading to potential fatigue damage and breakage.
Innovation Solution
A buckle design featuring a rotary structure with resilient latching arms and a socket that rotates relative to a base, allowing the strap fasteners to adjust and distribute stress evenly, preventing gathering and compression in a single area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the harness straps are fastened using a conventional buckle with fixed strap fasteners, then the child is securely restrained, but the stress from the harness straps concentrates in a limited area of the strap fasteners, causing fatigue damage
Solution Approach 1:
The socket is made rotatable relative to the base, allowing the strap fastener assembly to dynamically adjust its orientation. This dynamic capability enables the harness straps to change direction without creating concentrated stress points, as the rotating socket distributes the mechanical loads across different areas of the strap fastener over time, preventing fatigue damage while maintaining secure restraint.
Solution Approach 2:
The buckle is divided into separable components including the base, rotatable socket, and strap fasteners. This segmentation allows the socket to rotate independently on the base, creating movement freedom that prevents stress concentration. The modular design enables the strap fastener to adjust its position relative to the harness strap direction, distributing stress across multiple contact points rather than concentrating it in a limited area.
2Adaptability or versatility
If the harness straps change direction during child movement, then the child can move freely, but the strap ends gather and squeeze in a limited region of the strap fastener, causing stress concentration
Solution Approach 1:
The rotatable socket provides dynamic adaptability that allows the strap fastener to follow changes in harness strap direction caused by child movement. As the child moves and the straps change orientation, the socket can rotate to accommodate these directional changes, preventing the strap ends from gathering and squeezing in a fixed limited region, thereby distributing stress throughout the strap fastener structure.
Solution Approach 2:
The rotation capability of the socket adds a rotational dimension to the otherwise fixed strap fastener assembly. This additional degree of freedom allows the system to accommodate directional changes in the harness straps without creating stress concentration, as the socket can pivot to align with the new strap direction rather than forcing the straps to bend sharply at a fixed point.
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 buckle effectively prevents fatigue damage and breakage of strap fasteners by distributing stress evenly, ensuring a safer and more reliable child restrain harness system.
Implementation Method 1
a first strap fastener having at least one resilient latching arm
Data Source
AI summary
A buckle suitable for use with a child restrain harness comprises a first strap fastener having at least one resilient latching arm, a second strap fastener having a base provided with an opening, and a socket movably assembled through the opening, the socket being operable to rotate relative to the base, and the latching arm being operable to engage with the socket to securely hold the first strap fastener with the socket.