Rotary Impact Buffering Device for Safety Helmets

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Solution Overview

Problem

Traditional safety helmets are inadequate in handling rotary impacts, leading to increased risk of head bruises due to their inability to effectively buffer external rotary forces.

Innovation Solution

A safety helmet with a rotary impact buffering function, featuring a device that allows the shell to rotate relative to the elastic liner while maintaining the liner's stability, utilizing plastic nail holders, elastic washers, and convex rings for multi-directional deformation and enhanced structural stability, thereby reducing the impact of external forces.

Engineering Contradictions & Design Principles

VSEngineering 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 causing head bruises

Engineering Contradiction:

Improveprotection against rotary impactVSAvoidhead bruises from rotary impact

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The safety helmet is divided into distinct functional layers: an outer shell for structural integrity, a rotary impact buffering device with multiple buffering components (buffering columns, buffering washers, elastic supporting columns) for rotary impact protection, and an inner elastic liner for normal impact absorption. Each layer addresses specific impact types independently, resolving the contradiction by providing specialized protection without compromising overall reliability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The rotary impact buffering device acts as an intermediary layer between the outer shell and inner elastic liner. It includes buffering components that engage with the shell and elastic supporting columns connected to the liner, creating a mechanical mediation system that absorbs rotary forces before they reach the head, thereby protecting against head bruises while maintaining normal impact protection

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of energy

If the shell rotates relative to the elastic liner under tangential impact force, then the helmet can absorb some energy, but the user's head is prone to being bruised

Engineering Contradiction:

Improveenergy absorption from tangential impactVSAvoidhead bruises

Core Design Contradiction:

Loss of energyVSObject-affected harmful factors

Solution Approach 1:

The rotary impact buffering device is pre-configured with buffering components (buffering columns, buffering washers) and elastic supporting columns that are ready to engage before impact occurs. When tangential force is applied, these pre-positioned elements immediately begin absorbing energy through controlled deformation, cushioning the head from bruises before the shell can rotate excessively relative to the liner

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If the rotary impact buffering device allows the shell to rotate relative to the elastic liner, then rotary impact buffering is achieved, but the rotation angle must be controlled within a certain range

Engineering Contradiction:

Improverotary impact buffering functionVSAvoidrotation angle control

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The rotary impact buffering device utilizes parameter changes in its buffering components - the buffering columns and washers undergo controlled elastic deformation within specific ranges, and the elastic supporting columns change their stiffness characteristics as they compress. These parameter changes allow the shell to rotate relative to the liner for impact buffering while automatically limiting the rotation angle through increased resistance at deformation limits, maintaining both reliability and stability

Inventive Principle:

Principle #35Parameter changes

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, controlling the rotation angle and enhancing protection against rotary impacts, resulting in improved head safety compared to conventional helmets.

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

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 2

the rotary impact buffering device deforms within a certain range, 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

Methodology Applied

Scientific EffectEnergy absorption through deformation: Deformation

Data Source

PatentEP3391765B1Safety helmet with rotary impact buffering function

Publication Date: 2020.03.25 KU CHENG HUEI

Figure 1~2
Figure 3~4
Figure 5~6

AI summary

A safety helmet with a rotary impact buffering function comprises a shell (1) and an elastic liner (2) arranged in the shell, wherein a gap is formed between the shell and the elastic liner, and a rotary impact buffering device (5, 16) enabling the shell to rotate relative to the elastic liner is arranged between the shell and the elastic liner.