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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
0 {" d) q& b0 P1 m$ ebe permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,
$ b3 g& j+ M7 e$ [# M: Wthe risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit
# v0 |3 e: u8 o/ T8 a# w- bwill be assessed to determine whether it is still appropriate.; B1 `* \5 g- O0 g
Two or more magnets can attract each other and form a compound magnet with a higher flux index than each
3 F3 |8 M" l Jsingle magnet. The flux index will not double if two equally strong magnets are attracted to each other and the) S! ?" j9 s" U$ g1 g' Z0 K
increase in flux index will be relatively smaller for every new magnet that is added and will depend on5 O' b3 v q" z9 m/ V+ Q
magnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
& d k/ ^2 V( x; s7 Z+ Wstronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a
, b. X% B" r( O0 k$ f6 s0 Z(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.
4 x5 o2 i) L! x. O! h6 ~+ BToys that contain magnets and which can be expected to become wet during normal and foreseeable use are& \( K3 Q3 U4 m. g) i' Z1 F+ W
subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden2 s. n4 }9 d. q: _/ {
toys are subjected to the test since the properties of wood (such as size of holes) can change even with
& c' t& U B: A) Cchanges in air humidity.6 K* t" E$ [ z. s2 z: m+ S w
In some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension1 p. S( b9 {' X4 n
tests. Examples of toys have been found where a magnet has become detached by another magnet. A) ]) G7 ?7 I" b- H3 r
tension test for magnets has been introduced to minimize the risk that such magnets become detached during9 x5 v5 C4 e. g
normal and foreseeable play.* C4 Q$ N \! q! L% e: k
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a' h- y+ X1 U' F ^% @5 w* M: e4 E3 u
magnetic component (see 3.xx).( q! f! d$ S7 Z0 }
Functional magnets in toys are not considered to present the same risk as magnets that form part of the play* R/ V. s/ C: d7 b; u
pattern. The use of magnets in these components may not be recognized, as they will be present inside
8 W H' v' s" U' ?8 H4 ^+ belectrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to
! @: B+ B$ D6 w9 f; Jmagnets released from electrical or electronic components.; \5 J, n& I) B4 z5 m
Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the
B/ R# R. Q' | ?, s5 P' ?3 `requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to1 B3 }' S7 x# `( a e+ U8 P. I
only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,
% s. |7 ^1 [. W V+ X# b N# tetc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical
; I: F( w( X6 h, X! h; L/ zexperimental sets that are intended for children under 8 years are, therefore, required to comply with the& J+ C! D5 |& C. y) J. U
requirements in 4.30.2..5 l1 r, X) }. L. N$ d
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发表于 2012-11-12 14:43
