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T2mm2) are considered appropriate to ensure, with a safety margin, that powerful magnets of this type will not# x, o7 v2 s# p8 {5 B9 a
be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,, G& |% N4 O) v# ]
the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit
$ |' P# y% w" h4 v6 @# \will be assessed to determine whether it is still appropriate.
: b# I, ^3 G4 J9 R, Z% ~Two or more magnets can attract each other and form a compound magnet with a higher flux index than each) I! w( J. B0 l5 x% X: D$ `$ k
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
, F1 ]3 y# o; [! R2 v7 i+ Hincrease in flux index will be relatively smaller for every new magnet that is added and will depend on8 d" V% B5 H6 Z/ t
magnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with" @. q( J6 `% @$ h- \1 u3 r
stronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a X; Q( K, l1 p' L8 }' [; G k& u
(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.6 x6 o9 |( r0 n! L
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are
$ G: y- h1 B: m3 D* `4 B: xsubjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden
( Z/ Y0 T6 E% G" M- i4 utoys are subjected to the test since the properties of wood (such as size of holes) can change even with+ U4 C" \# X, @
changes in air humidity.
+ ^# a0 d4 L3 P7 IIn some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension$ }+ L# t; p+ l, R& R
tests. Examples of toys have been found where a magnet has become detached by another magnet. A
4 x/ R% h7 X& V* H2 V1 utension test for magnets has been introduced to minimize the risk that such magnets become detached during' {) ] P: T ]6 A7 z3 w
normal and foreseeable play.
: o# Z2 V! V6 ~! J6 ?3 c# ?' GFor toys that comprise only one magnetic component, that toy is considered to meet the definition of a
/ J4 `$ z5 {! Zmagnetic component (see 3.xx).
/ ` Q* Y+ R/ P8 n* O# YFunctional magnets in toys are not considered to present the same risk as magnets that form part of the play, R- y+ Y2 N: Z- ~% R9 f1 \5 R% I
pattern. The use of magnets in these components may not be recognized, as they will be present inside5 F" y9 l2 m9 ]% J0 _8 `7 ]
electrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to: ]. s' |0 h3 a8 R5 X2 I# o8 p0 R0 P
magnets released from electrical or electronic components.
$ a, j5 D7 W/ p; f" e( ~Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the% ~; Q( u* m3 ^
requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to8 C( [5 d1 o5 A
only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,' e% R, F: U" I0 F. m/ a
etc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical
: j u; h9 @6 r( y5 _experimental sets that are intended for children under 8 years are, therefore, required to comply with the. V$ y5 ^) b* C& y8 q
requirements in 4.30.2..
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发表于 2012-11-12 14:43
