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T2mm2) are considered appropriate to ensure, with a safety margin, that powerful magnets of this type will not
) h6 C+ V; A! k, I% Cbe permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,
7 l2 Q# N' |; ?4 A5 ?the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit
- Z& j* E1 D2 K: mwill be assessed to determine whether it is still appropriate.
/ h, l3 V& n# [1 j. pTwo or more magnets can attract each other and form a compound magnet with a higher flux index than each; K' e9 e7 T2 s
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the5 v+ w8 F6 c: g
increase in flux index will be relatively smaller for every new magnet that is added and will depend on
, J1 a) f* f3 Z" K3 Fmagnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
/ N0 y7 f" O+ n. G& i- Nstronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a: V8 n# f2 k. |6 d+ O3 {
(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.( s' w4 H1 x/ h3 M
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are
% h0 _6 P7 H( [- a \subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden
( y4 x* G* C) O+ B# n/ O1 N; P6 K6 x+ xtoys are subjected to the test since the properties of wood (such as size of holes) can change even with7 a5 o2 p. t; M) R* y8 y
changes in air humidity.0 o# i, ^$ ~" u+ K6 b
In some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension/ h. T( s# G8 G) J) f/ i. \6 J; a% `
tests. Examples of toys have been found where a magnet has become detached by another magnet. A
: J6 S% p* T/ a x: |* Itension test for magnets has been introduced to minimize the risk that such magnets become detached during
- }# E: k0 z Lnormal and foreseeable play.9 i" x; g6 L# ~" {' D
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a
8 `) g; x! v. a' `- t$ Vmagnetic component (see 3.xx).
. ]9 [* L8 V$ ]; ?Functional magnets in toys are not considered to present the same risk as magnets that form part of the play
; H5 y$ W2 a! ?' S# Wpattern. The use of magnets in these components may not be recognized, as they will be present inside
1 ?4 y# V2 |9 T% z- T( F* l Yelectrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to' J; i! R& k0 t) S1 k5 r
magnets released from electrical or electronic components.& z3 h/ [; i* {* ~6 C$ Q# a% ` s( V {
Magnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the
0 ^; [( a9 C# q, m$ z* Rrequirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to) r7 j& L- V8 z- }
only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells," T9 }9 n8 y4 x
etc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical; x, G8 W6 \- Z' S; R. R
experimental sets that are intended for children under 8 years are, therefore, required to comply with the
4 ^9 [) M) a$ g5 f9 E- Grequirements in 4.30.2..- H; U1 d7 u0 b) i! Z6 A# I# ^
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发表于 2012-11-12 14:43
