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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
1 T* J' c5 l$ | j0 [- [& ube permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,
, M: J6 [* N4 ?5 p% vthe risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit9 R, |' u1 V( i4 @1 x
will be assessed to determine whether it is still appropriate.
/ c$ O( m* n; K! L2 V" ] R. }Two or more magnets can attract each other and form a compound magnet with a higher flux index than each
T0 n* j/ P4 R5 F9 T2 R# Osingle magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
' c9 ?+ D; C2 \) a/ s& ^increase in flux index will be relatively smaller for every new magnet that is added and will depend on) m0 T/ a6 m. b
magnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with) M8 ^ A9 @- L4 x" f
stronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a
* i; {" P6 D0 G$ l( P/ y5 I4 i(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.
0 Q5 N/ t; S) ], a' l3 dToys that contain magnets and which can be expected to become wet during normal and foreseeable use are
# w% D2 b6 o8 Y# d3 ]subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden9 e1 O6 C( i6 i' C: q, E
toys are subjected to the test since the properties of wood (such as size of holes) can change even with
. }( j% j/ J; S6 y, Ichanges in air humidity.# j# Q x) i2 D8 p7 Q5 X' [
In some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension, G3 ~9 O1 R4 M& v- m1 v
tests. Examples of toys have been found where a magnet has become detached by another magnet. A
6 \/ G" F1 I* |" L2 {. Wtension test for magnets has been introduced to minimize the risk that such magnets become detached during
! q$ V$ s0 J" r ~normal and foreseeable play. `* U- q! p4 e+ f d i
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a2 Z" ` f3 B' S, K* {
magnetic component (see 3.xx).: M1 i+ P8 Z9 f$ Q, K
Functional magnets in toys are not considered to present the same risk as magnets that form part of the play
/ c8 _: @3 K5 \& }9 Zpattern. The use of magnets in these components may not be recognized, as they will be present inside5 z& w$ O) l/ L& O, c
electrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to
u3 ~7 _% B9 m% u, K$ ~& Imagnets released from electrical or electronic components.
! B- U- d, F v6 ]Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the9 w; u6 {0 _$ K" X" v _) z
requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to
+ b% X0 a. r% o* n7 v. donly the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,
' D# o5 Q, t) w4 F: setc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical& E6 i4 K; y5 p- d0 i2 K
experimental sets that are intended for children under 8 years are, therefore, required to comply with the/ e! B& Y# T4 n( J
requirements in 4.30.2..* z6 E2 |+ ?! w) R6 P: ]/ R% d, p
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