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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 D4 @2 @# i6 }& cbe permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,
8 Y' ?) [$ k& z e# c; x' othe risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit
0 \6 k4 g, s/ k" L' |& ~& ~" bwill be assessed to determine whether it is still appropriate.
3 E2 \3 u. }+ E1 G8 pTwo or more magnets can attract each other and form a compound magnet with a higher flux index than each: I0 O& a: W# o* y/ d# A
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the- ~* o4 b- E/ p* o9 F( x
increase in flux index will be relatively smaller for every new magnet that is added and will depend on
' C0 I2 o" K8 C' N1 E5 p& emagnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with, ~ `) }- J6 _' u+ ^. ~% y4 c
stronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a" @! l& C- N" l' P% H3 Q" H" D* z! ?
(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced./ w& g! @0 r# V( V' j
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are
$ O; {) Z& b0 x8 S( c4 A3 psubjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden# }3 ~9 ^; }3 T# }
toys are subjected to the test since the properties of wood (such as size of holes) can change even with( A! n0 N/ @) I6 F. V3 G* L
changes in air humidity. S9 W; O; v# T( C$ z, ~* u0 r
In some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension
: @2 ~% q" ^$ R5 a/ C, M6 Stests. Examples of toys have been found where a magnet has become detached by another magnet. A' y6 l1 G$ s/ |* D, B$ J
tension test for magnets has been introduced to minimize the risk that such magnets become detached during
% y5 J) o9 I2 xnormal and foreseeable play.: A' Y0 M$ @# p1 B3 Q: y
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a
( r' E% B. u- i, `6 d4 Umagnetic component (see 3.xx).
% u% h9 Z5 r. bFunctional magnets in toys are not considered to present the same risk as magnets that form part of the play
; q7 O0 G7 ]5 Q Z, qpattern. The use of magnets in these components may not be recognized, as they will be present inside
+ m s9 T, k0 nelectrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to# ]$ H3 d7 } S( `% t
magnets released from electrical or electronic components. `, _/ W4 l L, V" c6 y
Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the0 o$ P) Z* y! u$ o4 x( s
requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to" s. ]) i/ ]6 o' T. s2 ]0 V
only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,& ?2 Z9 n% T1 U
etc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical
& C. M3 n9 k n7 z% N" @experimental sets that are intended for children under 8 years are, therefore, required to comply with the% F8 S( E" y1 _9 `! Y
requirements in 4.30.2..
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发表于 2012-11-12 14:43
