1、Designation:F241606(Reapproved 2011)An American National StandardStandard Specification forProtective Headgear Used in Electric Personal AssistiveMobility Devices1This standard is issued under the fixed designation F2416;the number immediately following the designation indicates the year oforiginal
2、adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers performance requirements forhelmets manufactured
3、 for users of electric personal assistivemobility devices.1.2 All testing and requirements of this specification shallbe in accordance with Test Methods F1446,except where notedin this specification.1.3 Partial utilization of this specification is prohibited.Anystatement of compliance with this spec
4、ification shall be acertification that the product meets all of the requirements ofthe specification in its entirety.A product that fails to meet anyone of the requirements of this specification is considered tohave failed the specification and should not be sold with anyindication that it meets par
5、ts of the specification.2.Referenced Documents2.1 ASTM Standards:2F1446 Test Methods for Equipment and Procedures Used inEvaluating the Performance Characteristics of ProtectiveHeadgear3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 electricpersonalassistivemobilitydevice,nelec
6、trically-driven wheeled device for personal mobilitywith a speed limited to no more than 22.5 kph(14 mph).4.Headforms4.1 Headforms to be used in this specification are asspecified in Test Methods F1446.The appropriate size head-form shall be selected for the helmet to be tested as specifiedin Test M
7、ethods F1446.5.Anvils and Impact Velocities5.1 Anvils to be used for impact tests in this specificationare the flat,hemispherical,and curbstone anvils described inTest Methods F1446.5.2 The helmet shall be dropped onto the flat anvil toachieve an impact velocity of 6.2 m/s.5.3 The helmet shall be dr
8、opped onto the hemispherical andcurbstone anvils to achieve an impact velocity of 4.8 m/s.5.4 The impact velocity shall be measured during the last 40mm of free-fall for each test and shall be within 63%of thevelocities specified in 5.2 and 5.3.6.Marking the Test Line(Area of Required Coverage)6.1 T
9、he test line is shown in Fig.1 and shall be marked inaccordance with Test Methods F1446.7.Conditioning,Number of Samples,and LaboratoryEnvironment7.1 The test normally requires eight samples of each shell/liner combination.7.2 Conditioning of the samples to be tested is described inTest Methods F144
10、6.8.Retention System Testing8.1 The ambient helmet shall be subjected to the positionalstability(roll-off)test in accordance with Test Methods F1446,using a 4 kg drop mass from a height of 0.6 m.8.2 The hot,cold,and wet helmets shall be subjected to thedynamic strength retention test in accordance w
11、ith Test Meth-ods F1446,using a 4 kg drop mass from a height of 0.6 m.Theretention system shall remain intact without elongating morethan 30 mm.8.3 Retention system testing shall be completed prior toimpact testing.9.Impact Sites and Projections9.1 Impact sites are described in Test Methods F1446.9.
12、2 ProjectionsAny unfaired projection extending morethan 7 mm from the helmets outer surface shall break away or1This specification is under the jurisdiction of ASTM Committee F08 on SportsEquipment and Facilitiesand is the direct responsibility of Subcommittee F08.53 onHeadgear and Helmets.Current e
13、dition approved Nov.1,2011.Published February 2012.Originallyapproved in 2004.Last previous edition approved in 2006 as F2416 061.DOI:10.1520/F2416-06R11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStand
14、ards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 collapse when impacted with forces eq
15、uivalent to those pro-duced by applicable impact-attenuation tests in Section 5.There shall be no fixture on the helmets inner surfaceprojecting more than 2 mm into the helmet interior exceptoccipital stabilizers and foam fit pads.10.Impacting Schedule10.1 All impacting shall be performed in accorda
16、nce withTest Methods F1446.10.2 Helmets shall be impacted with the anvils centered onor above the test line described in Section 6.10.3 The test anvils can be oriented in any horizontal,centered position.10.4 One each hot,cold,wet,and ambient helmet shall beimpacted using the flat and hemispherical anvils only.10.5 The curbstone anvil shall be used to impact one timeeach of the second set of four samples,one conditioned undereach of the four conditioning environments.11.Peak Acceleration Require
