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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+ c# o" a( i: N
be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,) D2 ` }# t/ B( k
the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit# ]. _* n: t! ^( d: d. f% {* V* t
will be assessed to determine whether it is still appropriate.! [/ j" E5 w& B
Two or more magnets can attract each other and form a compound magnet with a higher flux index than each& a6 ]" {) |$ q$ X+ [
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
/ x/ D. N# Q% x6 |increase in flux index will be relatively smaller for every new magnet that is added and will depend on
. c( l4 m" i" n: W+ w2 U3 omagnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
1 I( ^' q I9 ]. n5 nstronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a9 e$ \, a! F) G, x: ?( a( a
(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.
! W4 h0 q# F. B9 ?* i& `Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are
0 G7 g; c5 o/ ~4 Ysubjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden
0 o! E/ w) B2 X; ntoys are subjected to the test since the properties of wood (such as size of holes) can change even with
4 v( e6 d. _2 L1 z# {changes in air humidity.
% A0 e/ H9 Y# a8 O5 l, ]! CIn some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension2 { t8 L3 {7 M$ A& \
tests. Examples of toys have been found where a magnet has become detached by another magnet. A
; d& E. E# R9 Y3 z% y* htension test for magnets has been introduced to minimize the risk that such magnets become detached during1 k6 r) w. `! L5 @5 a2 n
normal and foreseeable play.+ L! C3 @& `1 G+ z' X2 X8 w# ?& p
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a
. R) C) H4 Y9 x) Q, |magnetic component (see 3.xx)." e. p+ ]: w) u; P$ ?; U1 |/ V
Functional magnets in toys are not considered to present the same risk as magnets that form part of the play
6 P5 g& G0 \3 a; v4 z) H9 mpattern. The use of magnets in these components may not be recognized, as they will be present inside. r' B0 A# B$ O* A& x
electrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to
3 V! Y: J. k5 q- c6 ymagnets released from electrical or electronic components.
0 u" {7 G E* \# s, lMagnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the' M0 E3 \) j2 ?5 Q# u
requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to
. z* B: @) h Y( u8 vonly the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells, p; X+ ?2 S. e3 x% s& a3 s/ n, d
etc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical5 q5 x: ^+ r9 F4 }
experimental sets that are intended for children under 8 years are, therefore, required to comply with the
0 [% Y% {' _6 ~/ Yrequirements in 4.30.2..9 B1 n+ H5 h9 x3 S9 y# a
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发表于 2012-11-12 14:43
