Abstract: A neck portion (3) formed in the subterminal portion of the narrower diameter side of the funnel shaped separator, has holding portions (32a, 32b) and upper holding portion (33a, 33b) to hold magnetic rings (10, 11, 20, 21). The protrusions (80a, 80b) formed in the neck portion (3) have slope side (80a1, 80b1). Upon the insertion of the magnetic rings (10, 11, 20, 21) to the neck portion (3) from the narrower diameter side thereof, the magnetic rings (10, 11, 20, 21) contact the slope sides (80a1, 80b1) before they contact the slope sides (33a2, 33b2) of the protrusions (33a0, 33b0) of the upper holding portion (33a, 33b).

Abstract: The container section 18 comprises the contacting section (first contacting section) 18e1 of contacting with the top surface of the magnet 19, the stopper section (second contacting section) 18d1 of contacting with the tip of the top end of the magnet 19 and the first tongue 18c having flexibility, which contacts with the edge composed of the top end and the bottom surface of the magnet 19 and presses the magnet 19 to both the stopper section 18d1 and the contacting section 18e1. The projection 18f provided on the tip of the tongue 18c engages with the notch 19a provided on the magnet 19, so that the magnet 19 is allocated in the lateral direction.

Abstract: A neck portion (3) formed in the subterminal portion of the narrower diameter side of the funnel shaped separator, has holding portions (32a, 32b) and upper holding portion (33a, 33b) to hold magnetic rings (10, 11, 20, 21). The protrusions (80a, 80b) formed in the neck portion (3) have slope side (80a1, 80b1). Upon the insertion of the magnetic rings (10, 11, 20, 21) to the neck portion (3) from the narrower diameter side thereof, the magnetic rings (10, 11, 20, 21) contact the slope sides (80a1, 80b1) before they contact the slope sides (33a2, 33b2) of the protrusions (33a0, 33b0) of the upper holding portion (33a, 33b).