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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) z( P' d1 E1 b! j- @
be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,3 T' b$ T2 I1 m. o" G6 R
the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit# t% W4 v! J# I1 f! x& w- [- }; ]
will be assessed to determine whether it is still appropriate.. @& k3 l' F$ e6 h/ Q; M0 A
Two or more magnets can attract each other and form a compound magnet with a higher flux index than each6 } C; {" U6 W4 z5 h i1 [ C; C
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
3 l" V& x8 U, y4 ~& gincrease in flux index will be relatively smaller for every new magnet that is added and will depend on! c+ g* B6 v. I( d4 g6 z8 i" J
magnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
3 v4 H0 o4 q% ~9 {2 O1 xstronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a
! m' P0 e+ N* E3 L) c6 |$ E(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.& H' L- }8 C* f8 n& b8 w" }, E; a
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are! a8 \2 M1 T9 j ` q/ K% m$ S
subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden
5 W; n. n: G2 Otoys are subjected to the test since the properties of wood (such as size of holes) can change even with
$ h% q# W( T v" N: I5 `changes in air humidity.
2 h1 Z1 `* j/ s$ sIn some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension
, P/ k, x2 y3 G9 [8 ctests. Examples of toys have been found where a magnet has become detached by another magnet. A
" X( L! w4 Y7 ]8 h6 Atension test for magnets has been introduced to minimize the risk that such magnets become detached during) L u) C" _, H/ D& v F% y
normal and foreseeable play.
# O+ X1 c: N: ^) FFor toys that comprise only one magnetic component, that toy is considered to meet the definition of a
0 v* U: W% |& Y, F! hmagnetic component (see 3.xx).3 A, m8 I& C( I$ }' U; M
Functional magnets in toys are not considered to present the same risk as magnets that form part of the play
, n C. G- J# e- k" `6 d Tpattern. The use of magnets in these components may not be recognized, as they will be present inside( L& t+ y/ r9 \1 |3 k0 {# B
electrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to
. i+ _6 }& N! P6 h0 P5 m0 ?, cmagnets released from electrical or electronic components.: Q2 ?$ n' f W1 z- L
Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the* F" S" p0 f. g9 J I/ k# M, u, f
requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to
4 @8 |. _. S& ~& X7 Ponly the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,7 Y/ [9 R$ k6 K+ g1 a' x% G; ^' I
etc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical( _1 t/ z& w8 `, r+ l9 }( b
experimental sets that are intended for children under 8 years are, therefore, required to comply with the/ W* u' Q! J7 z
requirements in 4.30.2..
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发表于 2012-11-12 14:43
