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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 not0 d6 D0 O J$ T8 M
be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,: ^: R3 [" V, y0 a5 G$ \. r/ E# c" F
the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit
/ Z0 \; A' k. Q" x' R4 Z* `will be assessed to determine whether it is still appropriate.6 b `" L0 B) X B
Two or more magnets can attract each other and form a compound magnet with a higher flux index than each k0 `) }) S0 g4 ^# }0 L3 F, w
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
1 _7 g$ r/ b" Y# k3 ^6 Sincrease in flux index will be relatively smaller for every new magnet that is added and will depend on
7 U! O, d- H" @magnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
- ~0 z, `6 n% i5 rstronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a% ]; b) W9 X, W' c0 P4 E
(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.
/ b3 ]% |1 A( G, S& u; nToys that contain magnets and which can be expected to become wet during normal and foreseeable use are
. G) ~# s8 i+ p$ b6 H5 D xsubjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden
& t3 m L$ M/ [* ltoys are subjected to the test since the properties of wood (such as size of holes) can change even with0 d4 C% z; k/ z
changes in air humidity.
% [, k4 Y! A# y, a0 x4 rIn some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension
: s% K( o: g% m9 xtests. Examples of toys have been found where a magnet has become detached by another magnet. A
% Q v* S$ g2 i# E% O5 k6 Gtension test for magnets has been introduced to minimize the risk that such magnets become detached during: W, ~/ }3 Z) I+ B9 e: O& i
normal and foreseeable play. H) ` a/ N. t" z
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a$ g, o7 I$ q4 U$ ^5 @
magnetic component (see 3.xx).
3 h7 ]8 j! M* h# `- bFunctional magnets in toys are not considered to present the same risk as magnets that form part of the play# j8 X! C/ c+ k2 p+ y* W1 C
pattern. The use of magnets in these components may not be recognized, as they will be present inside
' h: J, A' P# m/ S) Kelectrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to
* d; n- ^* [8 dmagnets released from electrical or electronic components.: C+ m3 a' K% M. a1 k6 |
Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the
) [( c( u6 M7 \3 w$ Irequirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to
" `. I- \5 V+ [( B8 L2 K Ronly the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,, p0 p6 P; o7 X% x9 ^+ A, Y; M
etc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical
, S* j: ?# @/ `, J' eexperimental sets that are intended for children under 8 years are, therefore, required to comply with the8 |% Z; G* `: N: M5 A& k$ g
requirements in 4.30.2..+ [# L: U0 z- l; y4 ]$ n
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发表于 2012-11-12 14:43
