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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 not3 P% h% H) |, j/ @
be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,
; J7 p& A7 h/ ythe risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit
2 c- A, X5 h* Lwill be assessed to determine whether it is still appropriate.. }2 R# a7 ^$ e- k5 v
Two or more magnets can attract each other and form a compound magnet with a higher flux index than each$ s4 h' E1 O+ Q$ P+ K+ E$ n
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the1 w# [: g, [% B$ R) `+ a
increase in flux index will be relatively smaller for every new magnet that is added and will depend on/ x& E- u; O7 E4 G" Q' P
magnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
8 l* w0 X# \/ l1 }stronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a! b. I7 y+ T9 S) l/ ?5 K' L
(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.
8 ]" x5 u% u, v3 yToys that contain magnets and which can be expected to become wet during normal and foreseeable use are* {' n: q- c# f9 B( J
subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden+ k; E9 s# e& J% Z5 L0 Q% [( b5 B
toys are subjected to the test since the properties of wood (such as size of holes) can change even with
k' n3 `1 C( l" M$ c+ [changes in air humidity.- h+ \. x, s9 ], \4 F9 O2 Y( ~
In some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension. `9 {, ]) d4 A% C, v- [2 ?7 E
tests. Examples of toys have been found where a magnet has become detached by another magnet. A( ^1 G/ R1 S$ ^+ x1 V
tension test for magnets has been introduced to minimize the risk that such magnets become detached during
; Y1 D* ?- q2 Rnormal and foreseeable play.1 W1 }* d& Y& d: n) @) h: l
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a
5 o! O0 e8 M8 h( Y% c3 bmagnetic component (see 3.xx).
/ f( }0 b, ^+ O, ZFunctional magnets in toys are not considered to present the same risk as magnets that form part of the play
4 X, z% w+ J' N- gpattern. The use of magnets in these components may not be recognized, as they will be present inside; ?8 d8 C8 b# B5 h1 c/ F$ o
electrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to
- a- T8 d' H% n8 H9 P3 E& U3 o4 pmagnets released from electrical or electronic components.
1 r' A) I9 z TMagnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the
) C/ L }' u) arequirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to
3 ?9 x3 q$ {3 donly the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,
/ x) u( z6 s! @' Detc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical8 Y% `0 D6 z# s4 ~7 \5 O
experimental sets that are intended for children under 8 years are, therefore, required to comply with the% K. e9 X1 e8 F" s
requirements in 4.30.2..8 n4 F* r0 ~; X: f$ N
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发表于 2012-11-12 14:43
