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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 not8 k: i; ^* a* u% P' f, p- j0 i+ \
be permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,7 l$ J4 X8 k. I" h% R- z+ y& C D
the risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit( F( C/ X% _4 U( w! Z" B# |
will be assessed to determine whether it is still appropriate.- N! g A$ o; b4 `4 P# u
Two or more magnets can attract each other and form a compound magnet with a higher flux index than each
7 f5 F" b* e& U( Usingle magnet. The flux index will not double if two equally strong magnets are attracted to each other and the" y+ \) @4 @' \+ S% B2 U
increase in flux index will be relatively smaller for every new magnet that is added and will depend on
0 H1 r; v+ y0 @+ H6 ?- C9 u4 ~magnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with* ` l7 Z' e" c& |: ]
stronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a
) d" y. ?. p/ ~: z& e(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.' M6 |+ r- \$ U
Toys that contain magnets and which can be expected to become wet during normal and foreseeable use are8 r: w& A- s; s& b! `
subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden6 [% L. {6 I) g# v
toys are subjected to the test since the properties of wood (such as size of holes) can change even with
$ h1 t1 t; ~ Q. b$ Tchanges in air humidity.: Q- o6 L8 C$ d7 r% r/ T
In some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension! l9 a( g0 G2 R3 I$ Z$ J/ j
tests. Examples of toys have been found where a magnet has become detached by another magnet. A
8 m* z0 r2 u$ B/ gtension test for magnets has been introduced to minimize the risk that such magnets become detached during3 A# ^8 u4 _5 u |( i
normal and foreseeable play.
6 Q* Z0 [9 W$ E6 LFor toys that comprise only one magnetic component, that toy is considered to meet the definition of a
: d D7 |8 S6 ~; h3 G" mmagnetic component (see 3.xx).+ H% h F; j( I
Functional magnets in toys are not considered to present the same risk as magnets that form part of the play- h# s! A) v0 k; i+ G9 [. W
pattern. The use of magnets in these components may not be recognized, as they will be present inside/ ~+ d( u! o; ]
electrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to" D' f. n, f. k2 {
magnets released from electrical or electronic components.
( B! n2 K: u3 Z' o7 F# wMagnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the9 i1 H# x3 J( o: G
requirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to
' N9 K0 z% ?# b$ r% `# ?only the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,
: H9 m9 ? k3 [1 B4 F! B# Setc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical% y) d" j/ H: i8 d& c
experimental sets that are intended for children under 8 years are, therefore, required to comply with the
% ^3 Q$ M" o7 B' O# krequirements in 4.30.2..
5 ]% ~' b$ L; x) g$ J. M--`,`,``,,`,```,```,,````,,`,,`-`-`,,`,,`,`,,`--- |
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发表于 2012-11-12 14:43
