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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
% H' b& g" F9 m/ abe permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,( R; U# d8 H7 Q
the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit3 m3 k; }* `1 `8 m$ s" m+ {: w# {
will be assessed to determine whether it is still appropriate.
# w# e4 u$ M: |7 |* H( r6 GTwo or more magnets can attract each other and form a compound magnet with a higher flux index than each9 R; S7 g9 e% @
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
* x- G2 J8 ]) } bincrease in flux index will be relatively smaller for every new magnet that is added and will depend on
8 n Q6 r* u' ?6 g& F* Jmagnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with6 U9 Q% Z2 d0 e; a
stronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a
' V8 I9 Z0 g8 }5 t(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.8 e) x; V9 o- ?6 A! I* h% P
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are
5 f) y! p9 q% L8 jsubjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden' [# Z* \* `- I
toys are subjected to the test since the properties of wood (such as size of holes) can change even with: H9 }4 L$ w4 N8 _
changes in air humidity.# x" d# A# B& Z% `% ~
In some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension9 D4 C* g8 D! f. W
tests. Examples of toys have been found where a magnet has become detached by another magnet. A1 }3 Y! a1 s9 L% _1 w" p& C H
tension test for magnets has been introduced to minimize the risk that such magnets become detached during4 [: N" \: O6 B2 W% @, R9 p
normal and foreseeable play.
# J; A) ^5 W! f8 u& [: GFor toys that comprise only one magnetic component, that toy is considered to meet the definition of a# T) q; ?# C0 c0 q9 T# D
magnetic component (see 3.xx).
6 a: T5 [8 R/ f# i! g. G7 FFunctional magnets in toys are not considered to present the same risk as magnets that form part of the play
7 }9 ~8 F% x5 O$ \- ~6 A( dpattern. The use of magnets in these components may not be recognized, as they will be present inside4 J7 G1 h! W9 B! Y- G" d- ~+ q
electrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to9 M4 J- M$ f R3 } k* P
magnets released from electrical or electronic components.1 [4 p% ]: z5 E+ G# ~
Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the
4 n% g& J) f3 |requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to! Z+ L) J5 @" h! o9 o+ a
only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,
( {- {- a- b9 x0 ]1 G% k- Betc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical
& O+ f& h1 l6 wexperimental sets that are intended for children under 8 years are, therefore, required to comply with the0 k8 a9 n: r9 _' O+ |4 R
requirements in 4.30.2..
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发表于 2012-11-12 14:43
