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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, Z4 S& \9 c# }$ X- {% G
be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,3 f- b: v: i, X( l# y! g
the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit
0 h; }! I% `. t3 E+ T6 Uwill be assessed to determine whether it is still appropriate.
) f) f( t7 r/ N: X3 u; Z8 PTwo or more magnets can attract each other and form a compound magnet with a higher flux index than each6 y9 k$ n! s2 C
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
4 _# Z0 C7 c. O* ~increase in flux index will be relatively smaller for every new magnet that is added and will depend on
8 a, p2 S/ z6 {magnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
% N. k( L, f- F5 R; istronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a' O7 W' i& Z8 f- H7 i e
(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.: ^* Y9 s$ b6 `1 R7 s4 O
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are
# y! X. a! s1 U& d2 s& ysubjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden+ ?; K) Q8 f6 l9 E
toys are subjected to the test since the properties of wood (such as size of holes) can change even with
4 m; d9 k$ j# N. L4 k/ a. ]% Dchanges in air humidity.
7 t( Z& Y; p1 JIn some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension8 X) B: V' T* O$ j2 |! Z! Z1 `4 w
tests. Examples of toys have been found where a magnet has become detached by another magnet. A9 _' x" R- z' q# e& R) e3 W% @7 g
tension test for magnets has been introduced to minimize the risk that such magnets become detached during, z/ c6 ^4 b' X" i; ^
normal and foreseeable play.+ U8 V3 @1 ?* _' P7 O/ [
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a0 b% a* U/ w: J6 D) j1 H! r% [: O( g& `
magnetic component (see 3.xx).
& ]/ y; W6 ^+ d f2 G1 GFunctional magnets in toys are not considered to present the same risk as magnets that form part of the play
$ z$ E! z) |) U6 W; c- [pattern. The use of magnets in these components may not be recognized, as they will be present inside
) l4 O) x/ i* v F* }1 A: \( ~electrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to _+ Y6 ]: I5 {' b5 z# w R
magnets released from electrical or electronic components.
5 c+ }" [. _- t) ~0 J& cMagnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the
, ~! `& U7 N% P: B6 b3 {7 F0 R/ Yrequirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to# M' z/ b9 {0 i. ^+ N7 ]
only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,
, T- X5 v8 N9 J" Yetc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical; X$ B- B% y f" L2 Y( ]3 }4 w$ o
experimental sets that are intended for children under 8 years are, therefore, required to comply with the
* H4 F2 R8 b1 n) G8 c& Q) Rrequirements in 4.30.2..
$ V5 W3 x* T1 Q5 g. j--`,`,``,,`,```,```,,````,,`,,`-`-`,,`,,`,`,,`--- |
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发表于 2012-11-12 14:43
