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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; j2 _7 h6 G. g* `( p
be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,4 j, J4 r' g$ ^
the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit
" ~: ]; o4 y" ^6 x) z) lwill be assessed to determine whether it is still appropriate.5 f; G1 n6 G9 e" Z% G( B) b2 t
Two or more magnets can attract each other and form a compound magnet with a higher flux index than each
+ k4 v/ `: h6 u1 m1 hsingle magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
! t7 j; \# D7 s5 v. u- cincrease in flux index will be relatively smaller for every new magnet that is added and will depend on
9 f4 z) v# V- P' Ymagnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with+ {: p; R' r! q' B$ j8 b% `$ A
stronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a
# \. X+ h5 G2 D! a" d0 H(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.
) \# a7 ]1 f4 G/ wToys that contain magnets and which can be expected to become wet during normal and foreseeable use are, @ J7 K v8 l) R4 v
subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden0 k* K5 E! p9 \9 k
toys are subjected to the test since the properties of wood (such as size of holes) can change even with } B Y# w( _6 I1 U
changes in air humidity.* z- B1 d v0 _+ o0 e. l
In some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension
* U& M% {1 j' S! Ktests. Examples of toys have been found where a magnet has become detached by another magnet. A
/ G" @ z( i7 p% `8 itension test for magnets has been introduced to minimize the risk that such magnets become detached during$ j; u V) v3 V E- z
normal and foreseeable play.5 ?$ `$ V1 b7 V8 b9 R5 I
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a* t7 V+ Y2 ^6 j/ p" c2 R7 A6 E7 v$ ~
magnetic component (see 3.xx).' C. I6 P9 M8 q! p! F+ M
Functional magnets in toys are not considered to present the same risk as magnets that form part of the play+ e8 n# T' s1 |* L, d' p
pattern. The use of magnets in these components may not be recognized, as they will be present inside
9 ?" [$ g4 q& E+ Y5 }2 V9 Qelectrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to1 `+ Q1 Q% x2 D: y7 m9 y
magnets released from electrical or electronic components.
; C: {# l' K, Q! \Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the6 N) z: R. P: @
requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to
' M# T' x N: \only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,1 [# d0 D0 R$ S# l0 j, A: s
etc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical
9 N+ w" C. ]( C0 H$ ^experimental sets that are intended for children under 8 years are, therefore, required to comply with the* _2 t/ Z6 ^* F
requirements in 4.30.2..
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发表于 2012-11-12 14:43
