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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
* M2 x/ d! [3 o- z. L. abe permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,9 W- p, a. P( E
the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit9 I; v; f. ^, k. g
will be assessed to determine whether it is still appropriate.
6 f/ g2 d. E5 aTwo or more magnets can attract each other and form a compound magnet with a higher flux index than each& W. O( g. {+ P3 ^- H1 }/ z
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the+ V- `: D9 F: V( ? C+ u8 J2 \
increase in flux index will be relatively smaller for every new magnet that is added and will depend on
# p, d3 U8 B+ V' l1 z4 |" Gmagnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with! _" Y* h5 y8 z) I
stronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a
) x+ |& S# D: R+ h( I; _(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.
* w( V0 S- L6 F- {Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are3 L9 ^8 S% r8 u/ U9 y( P% J1 g
subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden- V& J& x4 G6 C6 L+ M2 j/ _
toys are subjected to the test since the properties of wood (such as size of holes) can change even with2 [% Q& {7 o* K. p3 q7 `. x! g, N
changes in air humidity.
# s' J- n$ ^1 p1 ~7 x0 y% d' uIn some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension
/ R$ O) A4 v) K5 Ctests. Examples of toys have been found where a magnet has become detached by another magnet. A- u, B! d# C9 B1 n: k9 ]( a
tension test for magnets has been introduced to minimize the risk that such magnets become detached during7 R6 X7 e# x5 L. ?* o0 I
normal and foreseeable play.
! `8 |$ p( W) i C- ZFor toys that comprise only one magnetic component, that toy is considered to meet the definition of a
: [, W( c% N2 W% y2 zmagnetic component (see 3.xx).. R, R1 y: l& h6 D" z- h, e- |) M
Functional magnets in toys are not considered to present the same risk as magnets that form part of the play
2 L! z+ [$ Y) ]1 R# }pattern. The use of magnets in these components may not be recognized, as they will be present inside& Y7 h, X" [$ d% K
electrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to" y' }; T8 l n4 O. A
magnets released from electrical or electronic components.
2 p, p3 y# a4 P X) AMagnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the. @9 a B$ q$ y+ w% \
requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to9 d, u) ]8 h9 @0 i
only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,9 Z& |% A1 j) R A( i" Z2 j% Z
etc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical K0 E6 ~1 v. k% g$ F) _
experimental sets that are intended for children under 8 years are, therefore, required to comply with the
s1 N& g( J' t5 T; O( prequirements in 4.30.2..
4 i8 f5 H* S. U. ]/ C--`,`,``,,`,```,```,,````,,`,,`-`-`,,`,,`,`,,`--- |
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发表于 2012-11-12 14:43
