|
|
楼主 |
发表于 2012-11-12 08:54
|
显示全部楼层
T2mm2) are considered appropriate to ensure, with a safety margin, that powerful magnets of this type will not
0 y1 C# W0 A( }) ibe permitted for use in toys if they fit entirely within the small parts cylinder. By introducing the flux index limit,
4 `- K/ C4 r+ y3 M' Z8 w lthe risk of injuries with magnets will be minimized. As additional data becomes available in the future, this limit+ k# {& n* o' u2 v# N1 L8 J p
will be assessed to determine whether it is still appropriate.: P9 d' A% h% f
Two or more magnets can attract each other and form a compound magnet with a higher flux index than each7 Z* M1 V5 |9 k) n7 E
single magnet. The flux index will not double if two equally strong magnets are attracted to each other and the
& R l3 y" t2 y' M$ I4 X: F/ Vincrease in flux index will be relatively smaller for every new magnet that is added and will depend on
6 Z; \; C4 ]% V- N Hmagnetic material, shape, cross-section, etc. Ingestion of multiple magnets has only been observed with
* z; Q- E% Z. X# pstronger magnets and there is no incident data regarding weak magnets close to the flux index limit forming a) {* `: j1 z& f0 T
(stronger) compound magnet. Therefore, no additional test for compound magnets is introduced.
: C/ @& D0 |" ~8 r# kToys that contain magnets and which can be expected to become wet during normal and foreseeable use are* z& \4 j" r. { ]6 ~+ a
subjected to a soaking test to ensure that glued magnets do not detach when the toy is wet. Also, wooden
. V$ n9 T6 d/ }6 o7 G Ntoys are subjected to the test since the properties of wood (such as size of holes) can change even with
/ \& b: M3 c' {# pchanges in air humidity.
3 a8 s) O. A$ Z' |; YIn some cases magnets are recessed and therefore, cannot be subjected to the normal torque and tension7 `7 i: D, ~9 d8 e
tests. Examples of toys have been found where a magnet has become detached by another magnet. A* |) Z* y6 E1 h' O6 D* o
tension test for magnets has been introduced to minimize the risk that such magnets become detached during$ p6 `* o% V1 N( R3 S0 R" v
normal and foreseeable play.# i" u; t) ]3 N8 t
For toys that comprise only one magnetic component, that toy is considered to meet the definition of a6 x, L" O# g/ w, F$ h
magnetic component (see 3.xx)./ ^8 q K3 I/ i
Functional magnets in toys are not considered to present the same risk as magnets that form part of the play
9 M; U9 j) F H( i" H- Qpattern. The use of magnets in these components may not be recognized, as they will be present inside
* w2 a. E1 O) O T: n0 aelectrical motors or in relays in electronic circuit boards. None of the reported incidents has been linked to
, D9 n* c2 a$ @" M! W) \9 Cmagnets released from electrical or electronic components.
( c: \9 A: b7 I c& V( e8 E' tMagnetic/electrical experimental sets that are intended for children over 8 years of age are excluded from the
( W9 K/ v& j* ^, L' z. Qrequirements in 4.30.2 and instead they are required to carry the prescribed warning. The exception applies to
j- V3 t0 {/ K- G% r9 k/ \! ^4 Donly the more advanced experimental sets that include building of electrical motors, loudspeakers, doorbells,
7 M0 v1 ?7 {% U9 C5 uetc., i.e. products that require both magnetism and electricity for their function. Magnetic/electrical
0 C, G# n5 M; K6 Jexperimental sets that are intended for children under 8 years are, therefore, required to comply with the( e, F, E; T) p- @
requirements in 4.30.2..
2 ?+ N5 [7 ^2 Z--`,`,``,,`,```,```,,````,,`,,`-`-`,,`,,`,`,,`--- |
|
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 )
窥视卡
雷达卡
显身卡
发表于 2012-11-12 14:43
