检验标准| 骑行头盔检验标准与方法 - 速航船务

Inspection Standards | Cycling Helmet Inspection Standards and Methods

Cycling Helmet Inspection Standard (GB 24429-2009)

1. Mandatory requirements for labels and instructions

project content
Outer box/product label Manufacturer's name and address, implementation standards, warnings (such as "fasten the laces" and "stop using after impact"), and conformity mark.
manual Must contain Chinese instructions: size selection method, lacing specifications, replacement recommendations after impact, and prohibition of corrosive solvents.

Key points of warning :
“Wearing it correctly can reduce the risk of injury, but it cannot completely avoid the risk”
"Read the instructions before use and discontinue use if a major impact occurs."

2. Structural safety requirements

part Technical requirements
case - Material is resistant to water/heat/cold, with smooth surface and no sharp edges
- Protrusions ≤ 7mm and shall not break during the test.
buffer layer - High energy absorbing material, covering the head protection area (above ABCDEF lines)
- There are no sharp objects larger than 2mm on the inner surface.
Wearable device - Lace width ≥ 15mm
- Can be unlocked with one hand, dynamic elongation ≤35mm, static elongation ≤25mm (no breakage after testing).

3. Key Performance Test Methods

  1. Wearing stability test

    • The helmet is worn on a standard head shape, with a 175g weight hanging on the rear hook

    • The weight falls freely from a height of 175mm and the helmet must not fall off.

  2. Lace strength test

    • After hanging a 5kg load on the strap for 30 seconds, apply a heavy hammer impact (free fall from a height of 600mm)

    • Dynamic elongation ≤35mm , static residual elongation ≤25mm , no breakage/loosening.

  3. Crash energy absorption test

    • The helmet hits a rigid surface at a speed of 5.44 m/s

    • The sensor measures the peak acceleration of the head ≤300g (g=9.8m/s²).

  4. Field of view verification

    Field of view minimum angle Test Benchmark
    Left/right horizontal ≥105° Symmetrical measurement of the longitudinal vertical plane
    Upper field of view ≥25° Headform reference plane extends upwards
    Lower field of view ≥45° The base plane of the head shape extends upward

4. Quality and design specifications

  • Weight tolerance : nominal value ± 30g

  • Ventilation holes : allowed, but must not reduce the structural strength

  • Comfort padding : must be breathable, sweat-absorbent, and non-irritating to the skin

Recall Case Warning

  • Issue : Shell rupture resulting in energy absorption failure (violating the shell rupture prohibition )

  • Consequence : Failure to protect the head during a violent collision led to the recall of 1,240 black cycling helmets.

  • Compliance points :

    • The shell material must pass the cold/heat shock test

    • The density of the buffer layer must meet the 300g acceleration limit

Medical data supports : Cycling helmets can reduce the risk of head injuries by 85% and reduce the mortality rate by 75%.

Summary : Compliant helmets must meet both the following requirements:

  1. Reliable structure (shell anti-crack + buffer energy absorption)

  2. Stable wearing (lace strength + anti-falling)

  3. Complete labeling (clearly warning of risks of use)

  4. Vision meets standards (105° horizontal + 45° downward vision to ensure riding safety)

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