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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 not3 {5 v0 ^. Y4 ]5 o
be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,
/ k! Q8 i' s: s' Rthe risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit
* z0 B$ [" B3 }8 U+ @2 Swill be assessed to determine whether it is still appropriate.
1 J% d4 d T2 F& J9 HTwo or more magnets can attract each other and form a compound magnet with a higher flux index than each% H4 ^% o9 D1 o! C2 R+ h. ]
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the1 d$ v% Y; c$ y
increase in flux index will be relatively smaller for every new magnet that is added and will depend on
, w4 e* j) g2 ymagnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
5 E( E# t; K+ U0 x( F; astronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a
( A& j9 B: r: C! c(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.7 b* V& A) R% V( {+ m8 t# J
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are
$ k: q' m2 D* `subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden
, w, Q3 h9 G% I9 x" m! |. {toys are subjected to the test since the properties of wood (such as size of holes) can change even with
/ a$ G) M% k. N7 U& J% fchanges in air humidity.
4 V8 z9 v& I3 zIn some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension9 x: C( q' P6 D1 T3 a! S
tests. Examples of toys have been found where a magnet has become detached by another magnet. A
& c7 t6 t1 w9 w, D2 P% Q( Ytension test for magnets has been introduced to minimize the risk that such magnets become detached during% x3 p) Z4 m% P& X
normal and foreseeable play.
. j: C1 v7 p: G9 cFor toys that comprise only one magnetic component, that toy is considered to meet the definition of a
% Z( c( ]# K3 y" {magnetic component (see 3.xx).
: T/ b+ ^# T1 J5 yFunctional magnets in toys are not considered to present the same risk as magnets that form part of the play
7 G; X; }% P0 {8 W+ h* Q) ]8 apattern. The use of magnets in these components may not be recognized, as they will be present inside
% S; J0 T- M* A/ Telectrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to+ k% {9 y8 c- D, j) U: X* ]
magnets released from electrical or electronic components.% y! W8 ]& c% X+ A7 Z: L
Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the
4 k) Z" h. M! U0 p9 z) _requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to# X4 G- l" W! s' S4 a' g3 u% L7 R
only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,5 | z" z; F# P% z
etc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical, I' x* j* M1 R
experimental sets that are intended for children under 8 years are, therefore, required to comply with the2 I c% A0 U6 M9 M
requirements in 4.30.2..
+ \$ Y4 p* _: l: A. I# {* H--`,`,``,,`,```,```,,````,,`,,`-`-`,,`,,`,`,,`--- |
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发表于 2012-11-12 14:43
