EN71 Head Probe

Item No.: LX-TB38
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EN71 Head Probe

The aim of this tests is to assess whether or not the head of a child can fit through a fixed loop.

CEN/TR 13387:2004 has been used as the source for the appropriate head dimension for children of less than 3 months

This probe is 96 mm in width, has two hemispherical ends with a radius of 48 mm and, as a consequence, a short flat side “e” which is 28 mm in length. The total perimeter of the probe is therefore 357 mm.

Since the limit of 380 mm, specified in EN 71-1 as the maximum perimeter of a noose, has been effective in preventing strangulation, the probe dimensions in Figure A.1 were changed to achieve the necessary values for the development of the test method for the perimeter of cords and chains. A probe with the following dimensions was chosen to achieve a perimeter of approximately 380 mm:
a: 96 mm;
b: 136 mm;
e: 40 mm.

When the cord attachment points are close to one another, it is easy to insert this probe with its main axis (see Figure A.1) perpendicular to the toy. If the perimeter of the cord is greater than 380 mm the probe can be inserted.

If the cord attachment points are further apart it is easier to insert the probe with its main axis parallel to the toy. In this case, to insert the probe, it is necessary for the distance between the toy and the cord to be at least 96 mm.

The dimensions at which the insertion of the probe becomes possible with the probe main axis parallel to the toy are as follows:
1) Perimeter of the probe: 380 mm;
2) width of the probe: 96 mm.

Therefore, if a rectangle with a perimeter of 380 mm and two sides of 96 mm is used, the other two sides shall be 94 mm long.

Company introduction

HK LEE HING INDUSTRY CO., LIMITED are specialized in manufacturing special, custom built, test and measuring equipment for products testing as per international norms and offering calibration services and related information. Our products and services are used by research & development establishments, test laboratories, defense establishments, government institutions & manufacturing industries to fulfill the clients' requirements.

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