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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+ v8 C; G: @, g
be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,
; O i4 L- M' K/ }- |4 mthe risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit& y% S" `1 ]- j% i
will be assessed to determine whether it is still appropriate.
% T6 }7 U# r3 L4 K" V/ DTwo or more magnets can attract each other and form a compound magnet with a higher flux index than each: P, \) L* I% ?7 I/ Z
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
/ @7 l, E* @0 J9 zincrease in flux index will be relatively smaller for every new magnet that is added and will depend on
+ l( m* s, A6 w( h3 ~7 ^+ Bmagnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
$ l* v9 ~, ?2 X6 x( g3 U5 Lstronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a1 t) x4 @( M: a' v
(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.: i }. a& a4 I2 z9 a
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are. M4 {6 j6 V9 R+ U1 ?
subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden
' {# L+ ?, G! D3 Stoys are subjected to the test since the properties of wood (such as size of holes) can change even with( P. Z+ }% k/ V$ h- i+ f. P
changes in air humidity.3 X9 h7 ?' _1 v1 p, L0 J
In some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension
. [3 U5 E, S) y0 ftests. Examples of toys have been found where a magnet has become detached by another magnet. A {# Y" O3 u& P3 C8 j6 d. J1 ?6 |
tension test for magnets has been introduced to minimize the risk that such magnets become detached during
& B" h8 z4 B& U! z$ Y- v- s( w+ |normal and foreseeable play./ w% T+ A6 L2 W2 Y! X
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a
3 p: c$ `6 O) v+ j* Amagnetic component (see 3.xx).& t- e! V0 u' H% W# N- \+ _5 }
Functional magnets in toys are not considered to present the same risk as magnets that form part of the play
- r/ P7 W! r& cpattern. The use of magnets in these components may not be recognized, as they will be present inside
$ r& k- z7 W$ ~electrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to
8 C8 d' T: Q3 N, A/ ~. c' M( e# qmagnets released from electrical or electronic components.
" p4 k# {" D* t% i( Y/ E. MMagnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the
8 b4 x# @# q. U! Mrequirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to
7 v6 Y9 J, J6 u+ k+ yonly the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,) l9 y) H9 o' w( c" f# @. S
etc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical$ ?) n( T8 Z( i$ J/ U
experimental sets that are intended for children under 8 years are, therefore, required to comply with the% I, K i9 y0 M: P2 s: A3 Z! U' v9 |
requirements in 4.30.2..4 X* W. G% X6 h* E- U2 _) Q
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发表于 2012-11-12 14:43
