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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/ p6 X- r3 I5 w' [
be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,9 x3 E8 C. z# C2 x/ o" T
the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit. ^) q. ^5 J8 k; y
will be assessed to determine whether it is still appropriate.
# j1 B0 Y6 o1 i4 w6 iTwo or more magnets can attract each other and form a compound magnet with a higher flux index than each
; k9 z' Z T) fsingle magnet. The flux index will not double if two equally strong magnets are attracted to each other and the2 X7 Q0 _& \( M9 A& F6 L+ V$ F
increase in flux index will be relatively smaller for every new magnet that is added and will depend on' @$ ]1 g( B+ S: _: T. s* Y, j7 Y
magnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
8 J0 A5 |# K3 k% nstronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a
0 W: {& }4 b8 B1 W(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.$ q* `; e9 y0 T9 R& d; v* y! h! ^: h
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are
5 w3 E0 ?" }! H) D" F+ Nsubjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden
5 i8 s& P" e G& c% v# o; K! y4 ^toys are subjected to the test since the properties of wood (such as size of holes) can change even with( G* i' K8 U, e' v
changes in air humidity.0 t: V t) x y. H. h
In some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension
2 k5 ?; m" D" ktests. Examples of toys have been found where a magnet has become detached by another magnet. A' W3 r( p8 e5 X
tension test for magnets has been introduced to minimize the risk that such magnets become detached during: }' j3 \, E' p+ F
normal and foreseeable play.! O' N( r, W3 `: ]
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a% n4 K6 x6 G6 z6 w- D, f
magnetic component (see 3.xx).
) @5 |- d2 r8 ~0 I0 tFunctional magnets in toys are not considered to present the same risk as magnets that form part of the play A9 a2 E H1 N7 i* Z W
pattern. The use of magnets in these components may not be recognized, as they will be present inside
2 ]* x0 J4 g. r0 m( C- ?# r) Lelectrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to
6 I; V. }0 v+ a% }4 V amagnets released from electrical or electronic components.
0 f3 E2 i( c; g& }& Z7 S1 I2 |Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the
% d8 `- K) x+ u" i7 Trequirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to, }, l* `! r" Z6 R/ \2 j6 }) q, L
only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,% y4 h# X! r- X/ Z( ?5 M7 L- |
etc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical
& a# u6 }$ P2 Q) I& h1 u9 ?. S9 Z4 p( Vexperimental sets that are intended for children under 8 years are, therefore, required to comply with the
3 ?7 N1 Q8 c5 l- rrequirements in 4.30.2..
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发表于 2012-11-12 14:43
