Safety Helmet Inner Lining Mechanical Coding for Secure Detachable Connection
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Solution Overview
Problem
Existing safety helmets with textile inner linings face challenges in easy detachment and reconnection for cleaning, leading to potential incorrect reassembly and reduced operational reliability, especially in contaminated environments.
Innovation Solution
The safety helmet features an arched helmet shell with a bearing structure and an inner lining that uses multiple connection units with distinct types, allowing for intuitive and tool-free detachable connections via projection and recess configurations, ensuring secure attachment and easy cleaning of the inner lining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the inner lining is detachably connected to the bearing structure using simple connection means, then the ease of detachment and reconnection is improved, but the reliability of the connection is worsened due to potential accidental detachment
Solution Approach 1:
The connection system is divided into multiple independent connection units distributed around the helmet. Each unit consists of a bearing structure-side component and an inner lining-side component that work together to provide both easy detachment and secure retention. The segmentation allows the inner lining to be removed and reattached while maintaining reliable connection through multiple distributed attachment points.
Solution Approach 2:
Different regions of the connection system have different properties: the bearing structure-side components are made of rigid or semi-rigid material to provide stable anchoring points on the helmet shell, while the inner lining-side components are made of flexible material to accommodate the contours of the head and allow easy manipulation during attachment and detachment. This local differentiation of material properties resolves the contradiction between ease of operation and connection reliability.
2Reliability
If multiple connection units are used to improve connection reliability, then the security of attachment is improved, but the device complexity is worsened
Solution Approach 1:
All connection units use the same basic design of bearing structure-side components and inner lining-side components. This universal design allows the same component types to be used repeatedly in multiple locations, providing reliable multi-point attachment while avoiding the complexity that would arise from using different connection mechanisms at different locations. The standardized components can be easily manufactured and assembled.
3Ease of manufacture
If the inner lining is made from textile material for comfort and hygiene, then the ease of cleaning is improved, but the connection stability is worsened due to difficulty in maintaining secure attachment
Solution Approach 1:
The inner lining-side components are made of flexible material that can dynamically adapt to the head shape and movement while maintaining connection stability. The flexibility allows the textile material to conform to contours and withstand the dynamic conditions of wear without compromising the secure attachment provided by the connection units.
Data Source
AI summary
A safety helmet (100) includes an arched helmet shell (1), a bearing structure (3, 4.l, 4.r, 5, 6, 8, 10), an inner lining and a plurality of connection units. The inner lining comes into contact with the head of a user of the safety helmet. The bearing structure is attached on the inside to the helmet shell. Each connection unit is capable of detachably connecting the inner lining to the bearing structure. Each connection unit comprises a bearing structure-side component and an inner lining-side component. Each component is configured as exactly one connection type. A bearing structure-side component is connectable to an inner lining-side component if the two components are configured as the same connection type. The two components cannot otherwise be connected to one another or are incapable of establishing a connection between the bearing structure and the inner lining.