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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
3 z; _5 ]. k& qbe permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,
' l- `; z3 h @/ Z) |1 cthe risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit2 v7 B) g; r0 B( L5 F
will be assessed to determine whether it is still appropriate.
* ^! X6 e% O$ ]$ q2 I& {' fTwo or more magnets can attract each other and form a compound magnet with a higher flux index than each$ V1 Y _2 O! j' n; T8 B
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
( [( z( E6 {" i) vincrease in flux index will be relatively smaller for every new magnet that is added and will depend on- K( F# Q0 i' _0 Q+ _
magnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with& V0 l0 A4 \! _% w
stronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a; m/ O8 {$ g' m; r% g3 t$ E. d
(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.1 T2 u7 F% D, l4 w+ v( T1 s4 o
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are
6 `6 z7 H& u5 E4 a0 M" @- Vsubjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden$ K& y, M/ v4 \2 V1 G1 c. W" r+ b+ s
toys are subjected to the test since the properties of wood (such as size of holes) can change even with8 Z' H4 Y, \7 p0 D/ _$ I
changes in air humidity." ~7 j: r" {0 I' S$ T ^
In some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension
# g4 Q: j7 y, x! P. K8 l* ^3 ltests. Examples of toys have been found where a magnet has become detached by another magnet. A
! O2 y7 f% \+ `; a: Ftension test for magnets has been introduced to minimize the risk that such magnets become detached during; D. r* ~' e+ v* G& \$ y/ e- v
normal and foreseeable play.: K* i q) }, O8 x
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a4 D M( D6 J" u2 a! D- B/ L
magnetic component (see 3.xx).
+ t; e! Z, w' [Functional magnets in toys are not considered to present the same risk as magnets that form part of the play
: Y& C2 d8 ^/ opattern. The use of magnets in these components may not be recognized, as they will be present inside0 b1 C% L; t- U' H3 U! V5 @; f
electrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to% C' h+ k" e J2 K4 K
magnets released from electrical or electronic components.
( v1 ~0 H" p# b$ T+ _* s$ pMagnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the' ~: q" \0 W1 I* w/ b6 q
requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to1 c5 Y M) a v; b/ V
only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,
; a2 R6 O2 l! g/ V8 G8 ietc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical: [) J3 }' ^& \
experimental sets that are intended for children under 8 years are, therefore, required to comply with the
5 E0 v1 d, |0 Srequirements in 4.30.2..
% t K. |+ E4 w5 ^% e6 b--`,`,``,,`,```,```,,````,,`,,`-`-`,,`,,`,`,,`--- |
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