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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& A K8 t9 K5 @' q% m
be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,5 y& ~6 Q% z# U
the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit
) p, E% Z7 I( g* ~will be assessed to determine whether it is still appropriate.- C- H7 j% f& U, I% Y
Two or more magnets can attract each other and form a compound magnet with a higher flux index than each+ W: N6 G I" J3 m
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
, }; X0 U. G8 lincrease in flux index will be relatively smaller for every new magnet that is added and will depend on
7 m! J' u# D3 D. ]% ]magnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
( ^+ c. T9 _- y- K1 C; Lstronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a8 y* T& L' n- O5 J8 b
(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.4 j( b& \( J# |+ D8 }7 O
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are
9 e1 |+ R0 v, K# f# Osubjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden
0 `5 F `3 x8 S3 _+ }toys are subjected to the test since the properties of wood (such as size of holes) can change even with
* e5 N1 v; o: n( W! Q1 k6 W, [9 D7 Ychanges in air humidity.
9 I5 q/ ]4 X3 b# x+ U$ I0 QIn some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension
) U0 P0 B. R% m% Xtests. Examples of toys have been found where a magnet has become detached by another magnet. A" x# ~5 d- j& ?# d6 E7 Y( v: M! {; L
tension test for magnets has been introduced to minimize the risk that such magnets become detached during( I0 U7 ~# t$ J$ r; ^+ k
normal and foreseeable play.; k% A+ C1 v2 p7 |. Y% [5 J0 M* }( n# s
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a
! ]! v' k Z- Q1 J! qmagnetic component (see 3.xx).
u: b8 d6 w+ h- e# u) UFunctional magnets in toys are not considered to present the same risk as magnets that form part of the play, |, _9 s- v- q1 x- H2 A; {! ?
pattern. The use of magnets in these components may not be recognized, as they will be present inside. ?5 t" j' u. z
electrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to, }9 L# P# c( y/ G
magnets released from electrical or electronic components.
+ k& @& y; j& _" E( dMagnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the
( }, ?+ {" f7 Srequirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to/ [7 u- T6 l Q* \
only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,0 J6 S+ I( ? v+ d/ y4 ~: }
etc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical4 F, \$ D c& E0 @. m
experimental sets that are intended for children under 8 years are, therefore, required to comply with the! p! Z o' y s( n8 q
requirements in 4.30.2..
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