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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
4 B) g" L5 m: ~" L! r4 ebe permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,4 N6 d" ?2 a: k4 u
the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit i7 z9 Z/ a% @) }! P
will be assessed to determine whether it is still appropriate.% J2 b/ T' \& a% b- B0 k0 X
Two or more magnets can attract each other and form a compound magnet with a higher flux index than each
8 \* x4 D) y2 Asingle magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
- ]3 @+ b4 y+ J- e" I! D$ }& gincrease in flux index will be relatively smaller for every new magnet that is added and will depend on
0 K7 v" k7 O/ t* Vmagnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
/ | _5 k3 b7 F6 }2 mstronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a
+ ~+ u) P! e: X' D3 g; X(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.) t+ X3 F& R4 u! R/ ^+ \1 S
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are2 i" S m) J- M5 V+ Y9 i4 ?
subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden5 N" v* {7 Q$ u7 O+ V/ w% Z
toys are subjected to the test since the properties of wood (such as size of holes) can change even with
7 o" V- L2 c) f+ }+ D3 j+ ]# S/ Wchanges in air humidity.' C; |+ i; |* Q' _1 n
In some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension8 Q+ N) _* H' W5 |9 K1 J
tests. Examples of toys have been found where a magnet has become detached by another magnet. A4 g: { } ^7 G
tension test for magnets has been introduced to minimize the risk that such magnets become detached during
. `! e$ f; x2 ^. \, f6 ~7 X; @normal and foreseeable play.6 @* \5 z; R* d! x* }0 K% @
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a
$ w$ O, Q; I5 s5 W9 b( {4 a% emagnetic component (see 3.xx).# A) s r2 W5 [/ a6 U9 p$ }* [
Functional magnets in toys are not considered to present the same risk as magnets that form part of the play0 I( Z% v/ C0 U' {8 I
pattern. The use of magnets in these components may not be recognized, as they will be present inside
$ \% y: ]( b& {( n+ _$ B. lelectrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to
$ C6 H8 V0 e+ k/ X4 Z# m( M) Pmagnets released from electrical or electronic components.1 m; C" L6 h( Y5 r9 h+ O
Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the" |" @$ m: A% }. P* d0 s/ ]
requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to
0 G" J: [. u. n! Jonly the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,+ z$ F) N) E4 L" l$ j
etc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical3 g$ b# m3 F8 h o" `: c5 G
experimental sets that are intended for children under 8 years are, therefore, required to comply with the8 b+ c0 Z: t1 f# X
requirements in 4.30.2..
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发表于 2012-11-12 14:43
