GB 11550-2009Strength requirement and test of automobile seats head restraints (English PDF)

Foreword

All technical contents of this Standard are compulsory.

This Standard will replace GB 11550-1995 Motor vehicles - Seats head restraints -

Performance requirement and test methods.

This Standard modifies and adopts Economic Commission for Europe's Regulations

ECE R25 (Version 1, 1999) Uniform Provisions Concerning the Approval of Head

Restraints (regardless whether it is integrated with seats) (English version).

This Standard has been redrafted according to ECE R25.Comparison schedule

between chapter numbering of this Standard and Regulations ECE R25 is listed in

Annex A.

Considering the situations of our country, when adopting ECE R25, there have been

some changes in this Standard.

The main technical differences BETWEEN this Standard AND ECE R25, and the

reasons are as follows.

- Delete Annex 3 "Procedure for Determining the 'H' Point and the Actual Torso

Angle for Seating Positions in Motor Vehicles" of ECE R25.In this Standard, the

contents involved with this aspect shall be executed by referring to the contents of

Annex C of newly issued national standard GB 11551-2003.This prevents the

errors in practical operation caused by difference of verbiage in standard drafting.

- Delete Chapter 3 Application of approval, Chapter 4 Markings, Chapter 5

Approval, Chapter 8 Conformity of production, Chapter 9 Penalties for

non-conformity of production, Chapter 10 Modification and extension of approval

of a type of head restraint, Chapter 11 Instructions, Chapter 12 Production

definitely discontinued, Chapter 13 Transitional provisions, Chapter 14 The

contents - Names and addresses of certification department and administrative

departments belong to "certification programs and certification mark". The

reasons are caused by the form difference of standard system and legislative

system.

Main differences between this Standard and GB 11550-1995 include.

- Add general requirements of head restraints (4.1 of this version);

- Add requirements of head restraints surface curvature (4.2 of this version);

- Add requirements of head restraints clearance dimension (4.6.2.2 and 4.6.3 of

this version);

- Add test requirements of head restraints clearance dimension (5.5 and Annex E

of this version);

- Add Annex C, which has specified the determination of head restraints height and

the chart of width measurement;

- Add informative Annex A (see Annex A of this version).

Annex B, Annex C, Annex D and Annex E of this Standard are normative; Annex A is

informative.

This Standard was proposed by National Development and Reform Committee.

This Standard shall be centralized by the National Automotive Standardization

Technical Committee.

Drafting organization of this Standard. Technical Center of FAW Automotive Group

Corporation.

1 Scope

This Standard specifies terms and definitions, requirements and test method for

automobile seats head restraints.1

This Standard applies to seats head restraint of vehicles of categories M and N of

GB/T 15089-2001.

This Standard does not apply to head restraint of folding, side-facing or

rearward-facing seats.

2 Normative references

The following referenced documents are indispensable for the application of this

document. For dated references, subsequent amendments (corrigenda excluded) or

revisions of these publications do not apply. However, the parties who enter into

agreement based on this Standard are encouraged to investigate the possibility of

applying the latest edition of the standard. For undated references, the latest edition of

the referenced document (including any amendments) applies.

GB 11551-2003 The protection of the occupants in the event of a frontal collision

for passenger vehicle

GB 13057-2003 The strength of the seats and their anchorages of passenger

vehicles

GB 15083-2006 Strength requirement and test of automobile seats, their

anchorages and any head restraints

GB/T 15089-2001 Classification of power-driven vehicles and trailers

3 Terms and Definitions

For the purposes of this Standard, following terms and definitions apply.

3.1

vehicle type

Power-driven vehicles which do not differ in such essential respects as.

3.2

head restraint

A device whose function is to limit the rearward displacement of an adult occupant's

head in relation to his torso in order to reduce the danger of injury to the cervical

vertebrae of that occupant in the event of an accident.

3.3

type of seat

Seats which share same dimension, framework or pad. The surface and color can be

different.

3.4

type of head restraint

Head restraints which share same dimension, framework or pad. The surface, color

and panel skin can be different.

3.5

reference point (H point)

Crossing point BETWEEN torso of three-dimensional H-point device representing

human body in relation to the theoretical pivot of thigh AND longitudinal vertical plane

of seat.

4 Requirements

5 Test methods