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发表于 2012-11-12 08:54
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T2mm2) are considered appropriate to ensure, with a safety margin, that powerful magnets of this type will not g1 \2 q* S/ x& r
be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,
" }' y2 R3 ^( zthe risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit
& X) R' }+ A. O6 f! Z% awill be assessed to determine whether it is still appropriate.
6 _' Y5 D U4 J J' l, l& [. o2 m" ~Two or more magnets can attract each other and form a compound magnet with a higher flux index than each
3 @# s2 ^: O0 |5 P& wsingle magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
8 t" }: E: I ~/ M0 }increase in flux index will be relatively smaller for every new magnet that is added and will depend on
f4 d8 I. \; N( [% T" f& x) Omagnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with& j! i' z! f1 q- z: h
stronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a" q) d$ t/ I) i4 `" x% E2 Z% L
(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.% U/ h! F: q& J9 u- H! x' U
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are ]8 u; K, w8 I
subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden' `1 S2 ^3 b* ?4 S% ~
toys are subjected to the test since the properties of wood (such as size of holes) can change even with
2 Q, ?( R1 I" w: I8 Echanges in air humidity.
0 s0 `- M$ h9 O' k/ I3 `. cIn some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension
, b' d7 D+ D3 `9 o: mtests. Examples of toys have been found where a magnet has become detached by another magnet. A) k7 z% C* u2 R* O
tension test for magnets has been introduced to minimize the risk that such magnets become detached during
4 F: f4 w" V2 V% U( A8 B6 n% ]5 Knormal and foreseeable play.# j, t0 t0 Q4 m5 ~2 v
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a
6 ]8 ?) V: g. U+ Zmagnetic component (see 3.xx).
$ F& f9 x ?- R# v- DFunctional magnets in toys are not considered to present the same risk as magnets that form part of the play* a; s7 A; J6 I7 I2 X3 C, W+ O, G) q& |
pattern. The use of magnets in these components may not be recognized, as they will be present inside& z* n% @2 [+ q; j% ?( ?) p
electrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to( }1 q0 }5 c" {7 P
magnets released from electrical or electronic components.- n2 t2 T4 p8 T" ]( Y4 g6 B
Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the
$ U( Z( _, J) l3 O" i1 Lrequirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to$ o! ?1 C" N3 T( x& T6 a- \: j8 ~/ ~
only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,
$ B0 G9 D. \- S+ e( S+ g i0 V& a, Vetc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical
, o, |. r; b& D! x4 Fexperimental sets that are intended for children under 8 years are, therefore, required to comply with the' M0 L1 f/ F" |5 t& N
requirements in 4.30.2..
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