1、BRITISH STANDARDBS 6658:1985Incorporating Amendment Nos. 1 and 2Specification forProtective helmets for vehicle usersg49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42
2、g43g55g3g47g36g58UDC 614.891.1:629.047:687.434:629.113otorcyclists Federationdards Advisory Committee of BSITransport (Highways)BS 6658:1985Committees responsible for this British StandardThe prepEqupon wAuBrBritish MConsumer StanDepartment of InThis British Standard, having been prepared under the
3、direction of the Personal Safety Equipment Standards Committee, was published under the authority of the Board of BSI and 29 November 1985. It comes into effect on a data to be announced (see foreword) BSI 14 October 2005The following BSI references relate to the work on this standard:Committee refe
4、rence PSM/10Draft for comment 84/38419 DCISBN 0 580 14684 7dustrial Safety (Protective Equipment) Manufacturers AssociationMetropolitan PoliceMinistry of DefenceMotor Cycle Association of Great BritainRoyal Automobile ClubAmendments issued since publicationAmd. No. Date of issue Comments5128 Februar
5、y 198615925 October 2005 Indicated by a sideline in the marginaration of this British Standard was entrusted by the Personal Safety uipment Standards Committee (PSM/-) to Technical Committee PSM/10 hich the following bodies were represented:to Cycle Unionitish Medical AssociationBS 6658:1985 BSI 14
6、October 2005ContentsPageCommittees responsible Inside front coverForeword ii1Scope 12 Definitions 13 Classification 24 Materials 25 Construction 26 Performance 57 Flammability (optional) 78 Marking 79 Information to users (labels) 8Appendix A Recommended method for assessing ageing of helmet shell m
7、aterials 10Appendix B Extent of shell and peripheral vision 10Appendix C Recommendation on minimum radii for thermoplastics materials 10Appendix D Solvent conditioning 10Appendix E Conditioning before testing 11Appendix F Shock absorption test 12Appendix G Penetration test 13Appendix H Test for effe
8、ctiveness of retention system 14Appendix J Test for strength of retention systems with chin straps 15Appendix K Test for chin strap slippage 18Appendix L Test for resistance to abrasion of the chin strap 18Appendix M Test for strength of retention systems without chin straps 21Appendix N Test for re
9、sistance to inertial release of quick-release mechanism, or “buckle” 22Appendix P Test for durability of quick-release mechanism 22Appendix Q Oblique impact test 24Appendix R Test of chin guard 27Appendix S Test for flammability 27Figure 1 Headform and helmet reference points 3Figure 2 Peripheral vi
10、sion regions 4Figure 3 Warning label 9Figure 4 Warning label for helmets for motor car sports use 9Figure 5 Apparatus for testing shock absorption 11Figure 6 Test block for testing penetration resistance 14Figure 7 Modified headform for testing retention system effectiveness 15Figure 8 Apparatus for
11、 testing retention system effectiveness 16Figure 9 Apparatus for testing retention system strength 17Figure 10 Apparatus for testing slippage of the chin strap 19Figure 11 Apparatus for testing abrasion of the chin strap 20Figure 12 Headform arrangement for testing strength of retention systems with
12、out chin straps 21Figure 13 Apparatus for testing resistance to inertial release of buckles 23Figure 14 Apparatus for oblique impact test 25Figure 15 Apparatus for testing chin guard 26Table 1 Sequence of testing 13Table 2 Impact velocities 13iPublications referred to Inside back coverBS 6658:1985ii
13、Standards Committee and is a combined revision of BS 2495:1977, and BS 5361:1976 which will be withdrawn following a transition period after this standard becomes effective. This revision is intended to replace these two standards and becomes effective at such date as it is invoked by Regulations ex
14、pected to be made by the Secretary of State for Transport. Helmets complying with BS 2495 were originally intended for high speed motor car racing but came to be used in other competitive events and as high-protection helmets for motor cycle riders on public roads.Two types of helmet, A and B, are s
15、pecified. Both types are intended to be adequate for use on public roads. Type A corresponds to the former high-protection standard and is intended for competitive events and for use by wearers who demand an especially high degree of protection. Type B is intended for the ordinary motor cycle rider
16、on public roads. The type A specification consists of the type B specification with more stringent requirements; in particular, the conditions of test for shock absorption and resistance to penetration are more severe for type A than type B.The protection given by a helmet depends on the circumstanc
17、es of the accident, and wearing a helmet cannot always prevent death or long-term disability.A proportion of the energy of an impact is absorbed by the helmet, thereby reducing the force of the blow sustained by the head. The structure of the helmet may be damaged in absorbing this energy and any he
18、lmet that sustains a severe blow needs to be replaced, even if damage is not apparent.To achieve the performance of which it is capable and to ensure stability on the head, a helmet should be as closely fitting as possible consistent with comfort; in use, it is essential that the helmet is securely
19、fastened, with any chin strap under tension at all times.This revision differs from the standards which it replaces notably as follows. New materials are catered for, an oblique impact test replaces many of the former constructional requirements, there are new tests for chin guards and for the effec
20、tiveness of the retention system and the concept of separate component testing has been introduced.Certification. Attention is drawn to the certification facilities described on the inside back cover of this standard.A British Standard does not purport to include all the necessary provisions of a co
21、ntract. Users of British Standards are responsible for their correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 27, an inside back co
22、ver and a back cover.This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.ForewordBS 6658 was prepared under the direction of the Personal Safety Equipment BSI 14 October 2005BS 6658:1985
23、 1 ScopeThis British Standard specifies requirements for helmets to be worn by riders, drivers and passengers of motor vehicles, including participants in competitive events. Requirements for accessories such as visors, goggles, detachable peaks and detachable face covers are not specified unless th
24、ey are supplied with the helmet as original equipment. Eye-protectors are specified separately in BS 4110.Requirements and the corresponding methods of test are given for:a) extent of shell;b) shock absorption properties;c) penetration resistance;d) response to oblique impact;e) strength of chin gua
25、rd;f) strength and effectiveness of retention system.In addition, a method of testing flammability is given for helmets for which compliance with the optional flammability requirement is claimed (see clauses 7 and 8). A recommended method for assessing the resistance of helmet shell materials to age
26、ing is also given.NOTE The titles of the publications referred to in this standard are listed on the inside back cover.2 DefinitionsFor the purposes of this British Standard the following definitions apply.2.1 helmetheadwear primarily intended to protect against a blow to the part of the wearers hea
27、d that lies above the basic plane, without preventing adequate peripheral vision2.2 shellthe hard, smooth material that provides the general outer form of the helmet2.3 protective paddingliner material provided to absorb impact energy2.4 comfort paddingsoft material provided to ensure a close fit to
28、 the wearer2.5 2.6 quick-release mechanisma system attached to, or incorporated in, the helmet that allows the retention system to be fastened and unfastened quickly2.7 chin strapa strap that passes under the wearers chin or lower jaw and is intended to retain the helmet on the head under impact2.8
29、chin cupa device that fits around the point of the wearers chin2.9 chin guardan extension of the shell covering the lower part of the face2.10 face coveran accessory protecting the lower part of the face against mud, stones and weather2.11 peaka semi-rigid extension of the shell above the eyes2.12 v
30、isor (eye screen)a transparent protective screen extending over the eyes and covering part or all of the face2.13 goggleseye-protectors having a one-piece protective lens or individual lenses designed to cover the orbital cavities and to be in contact with the face around the eyes2.14 basic plane1)
31、Of a human head. A plane at the level of the external auditory meatus (external ear opening) and the inferior margin of the orbit (lower edge of the eye socket).2) Of a headform. That plane relative to the headform that corresponds to the basic plane of the head that the headform simulates.3) Of a h
32、elmet. That plane relative to the helmet that corresponds to the basic plane of the head that the helmet is intended to fit. BSI 14 October 2005 1retention systemthe complete assembly that prevents the helmet from coming off the headBS 6658:19852.15 reference planea plane, relative to a headform, pa
33、rallel to the basic plane and at a distance above it specified in BS 64892.16 central vertical axisthe line relative to a human head or headform or helmet that lies in the plane of symmetry, and that is normal to the reference plane at a point equidistant from the front and back of the headform or (
34、for helmets) of the headform that simulates the head that the helmet is intended to fit2.17 longitudinal vertical planethe vertical plane of symmetry of a human head or headform or of a helmet as it is intended to be worn on the head2.18 central transverse vertical planea plane at right angles to th
35、e longitudinal vertical plane and passing through the central vertical axis2.19 size (of a helmet)the size of head which the inner parts and retention system of the helmet are designed to fitNOTE Several different sizes of helmet may be manufactured from one size of outer shell.3 ClassificationHelme
36、ts shall be classified as either type A or type B.NOTE The requirements for the two types differ in the severity of impact in the tests for shock absorption and resistance to penetration (see clause 6), and in the requirement to identify the type by marking (see clause 8).4 Materials4.1 The material
37、s used in the manufacture of helmets shall be known not to be sensitive to ageing due to exposure of the helmet in use to influences such as sunlight, rain, road spray and fumes, and extremes of temperature.NOTE A method currently under development for assessing the ageing of helmet shell materials
38、for information purposes is described in Appendix A. This method is applicable to all shell materials and to surface coatings on shells.If the shell is made of a thermoplastics material or of a material which is known to be adversely affected by contact with hydrocarbons, cleaning fluids, paints, tr
39、ansfers or other extraneous 4.2 For those parts of the helmet coming into contact with the skin, the material used shall be known not to undergo significant alteration in its performance due to contact with sweat or with substances likely to be found in toiletries. For those parts, materials shall n
40、ot be used which are known to cause skin disorders.5 Construction5.1 GeneralThe construction of the helmet shall be essentially in the form of a shell containing the necessary additional means of absorbing impact energy secured within the shell. Anchorages for the tethers for a head and neck support
41、 system as used in motor car sports are permitted.5.2 Extent of shellWhen assessed by the method described in Appendix B, the shell shall extend downwards on both sides of the headform at least as far as the lines CDEF as shown in Figure 1 and defined in BS 6489.NOTE A recommendation on minimum radi
42、i for thermoplastics materials is given in Appendix C.5.3 Internal projectionsThere shall be no sharp edges on the inside of the helmet, and rigid projections shall be covered with protective padding.5.4 Retention5.4.1 General. Means shall be provided for retaining the helmet on the wearers head. Th
43、is shall be either a chin strap anchored to the shell, or other means which secures the helmet to the head. All parts of the retention system shall be permanently attached to the system or to the helmet.5.4.2 Chin straps. Chin straps shall be at least 20 mm wide and may be fitted with means of enhan
44、cing comfort for the wearer. A chin cup shall not be fitted to any system consisting of a single chin strap. Where a helmet is fitted with additional straps (one of which may carry a chin cup) to improve performance or provide comfort, the strap or straps which are necessary to meet the performance
45、requirements of this standard shall be positively indicated by durable marking or other durable means.2 BSI 14 October 2005additions, then the helmet shall carry on its information label an appropriate warning as specified in item h) of 9.1.BS 6658:1985 BSI 14 October 2005 3NOTE The perimeter BB9 is
46、 defined in F.3.4 and the precise positions of the other points indicated by letters are defined in BS 6489.Figure 1 Headform and helmet reference points BS 6658:19855.4.3 Fastening devices5.4.3.1 Chin straps shall be permanently fitted with a device to adjust and maintain tension in the strap.5.4.3
47、.2 Chin strap fastening and tensioning devices shall be positioned on the straps either so that there are no rigid parts extending more than 130 mm Figure 2 Peripheral vision regions4 BSI 14 October 2005vertically below the headform reference plane with the helmet mounted on the appropriate sized he
48、adform, or so that the whole of the device is between the bony projections of the underside of the lower jaw.BS 6658:1985 5.4.3.3 If a retention system includes a quick-release mechanism, then the method of release of this mechanism shall be self-evident. Any levers, tabs, buttons or other component
49、s which need to be operated to release the mechanism shall be coloured red, those parts of the rest of the system which are visible when closed shall not be similarly coloured, and the mode of operation shall be permanently indicated.5.5 Peripheral visionWhen the helmet is mounted on the smallest headform appropriate to the size range of the helmet and complying with BS 6489 size A, C, E, G, J, K, M or O above the basic plane, vision shall be unobstructed within three regions defined as follows.a
