Rotary Impact Buffering in Safety Helmets
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Solution Overview
Problem
Traditional safety helmets are inadequate in handling rotary impacts and fail to effectively protect users from bruises caused by external rotary forces, as they tend to rotate under tangential impact, exposing the head to further injury.
Innovation Solution
A safety helmet with a rotary impact buffering function, featuring a shell and an elastic liner with a rotary impact buffering device that allows the shell to rotate relative to the liner while maintaining the liner's stability, utilizing components like plastic nail holders, elastic washers, and U-shaped buffering strips to absorb and control rotational forces, thereby reducing the impact on the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional safety helmets are used, then they can protect against normal impact force, but they cannot effectively buffer rotary impact force and the shell rotates under tangential impact
Solution Approach 1:
The patent introduces a rotary buffering device that allows the shell to rotate relative to the liner through elastic deformation. The device includes elastic components (elastic rings, elastic columns) that enable controlled rotational movement, transforming the rigid structure into a dynamic system that can absorb rotary impact energy through relative rotation rather than direct force transmission to the head.
Solution Approach 2:
The rotary buffering device acts as an intermediary mechanism between the shell and the liner. It includes components like elastic rings with protrusions and grooves, and elastic columns that mediate the interaction between shell and liner, allowing energy absorption through elastic deformation and controlled rotation while protecting the head from direct rotary impact forces.
2Strength
If the shell is made rigid to protect against impact, then normal impact protection is improved, but the shell cannot deform to absorb rotary impact energy
Solution Approach 1:
The patent divides the helmet into functionally independent segments: the shell, the rotary buffering device, and the liner. The buffering device itself is segmented into multiple elastic components (multiple elastic rings, multiple elastic columns) that can deform independently. This segmentation allows each part to perform its specific function while maintaining overall structural integrity.
Solution Approach 2:
The patent changes the physical parameters of the buffering components, specifically using elastic materials with appropriate modulus values, designing specific geometric parameters (protrusion dimensions, groove depths, column heights) that allow controlled deformation within a certain range. This enables the rigid shell to have controlled flexibility through the elastic components.
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 solution significantly reduces the rotational impact on users by allowing controlled rotation of the shell relative to the elastic liner, enhancing protection against rotary impacts and improving overall safety helmet performance.
Implementation Method 1
the rotary impact buffering device is capable of elastically deforming in the normal direction of the safety helmet and also capable of elastically deforming in the tangential direction of the safety helmet
Implementation Method 2
utilizing components like plastic nail holders, elastic washers, and U-shaped buffering strips to absorb and control rotational forces
Implementation Method 3
after the shell of the safety helmet rotates relative to the elastic liner by a certain angle, the anti-rotation damping force of the rotary impact buffering device is increased greatly
Data Source
AI summary
A safety helmet with a rotary impact buffering function comprises a shell and an elastic liner arranged in the shell, wherein a gap is formed between the shell and the elastic liner, and a rotary impact buffering device enabling the shell to rotate relative to the elastic liner is arranged between the shell and the elastic liner. When the safety helmet is impacted by external force, the shell has the tendency to rotate relative to the elastic liner under the effect of component force applied to the shell in the tangential direction; however, through tangential deformation of the rotary impact buffering device, the shell can rotate relative to the elastic liner by a certain angle on the premise of keeping the elastic liner unmoved, and thus the impact to users from external force is greatly reduced.