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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
' n8 ~$ C- _7 I+ W& W @be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,$ _$ U- B) n- t; r' q
the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit& X- c% C; c9 q' W- T
will be assessed to determine whether it is still appropriate." D( ?& u4 s% \& n
Two or more magnets can attract each other and form a compound magnet with a higher flux index than each
2 R3 E) V) Q: ]& ~8 {single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the; V0 H! E* x1 W+ W4 z
increase in flux index will be relatively smaller for every new magnet that is added and will depend on4 y% N2 b7 |$ a6 z. R7 I, n
magnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
9 B! r! [) t1 B9 hstronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a8 _3 v* p8 B# h, G% g$ ^
(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced." d6 `: d C5 |! I- v
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are) }" F0 F' V$ |0 d& h% z6 F; U
subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden5 b5 L5 b% Y3 t
toys are subjected to the test since the properties of wood (such as size of holes) can change even with8 H1 _( N5 y$ k7 y$ n5 l
changes in air humidity.# v# I/ E) \0 f }$ {4 x+ Z
In some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension
6 X* ?4 z# E" @8 i; ytests. Examples of toys have been found where a magnet has become detached by another magnet. A
, L! `' x3 s: D7 ~tension test for magnets has been introduced to minimize the risk that such magnets become detached during
3 K- c* A) r$ o5 x r% hnormal and foreseeable play.- p9 G8 C6 a k# H* Z$ X: ~
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a
- C3 z2 Y ]0 h! i. lmagnetic component (see 3.xx).
8 w1 v, g v. J$ C6 mFunctional magnets in toys are not considered to present the same risk as magnets that form part of the play+ V/ A( v, [: o4 X! O
pattern. The use of magnets in these components may not be recognized, as they will be present inside
: n& `8 t! u) relectrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to
6 h$ z5 V4 \ n; f, E4 K1 L2 Z4 Pmagnets released from electrical or electronic components.% g. J' ~5 a" h$ Q" ^
Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the U& o/ k L% U, ]( x# L" B
requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to8 g5 [) n4 C! _
only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,
0 Q. K ?! s9 f6 p2 I4 L# Z$ wetc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical; n. A( P3 t/ G3 V
experimental sets that are intended for children under 8 years are, therefore, required to comply with the3 r* r" f: h+ L5 j
requirements in 4.30.2..* ]0 a- Q @0 Y0 o
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