US 10,355,418 B2 · Noise reduction unit

Abstract

A noise reduction unit (100) is equipped with a noise filter (10), a housing (80) which houses the noise filter, and a sealing material (90) which is charged in the housing. The noise filter is equipped with conductors (20) having respective winding portions (21) and a ring-shaped core (30) which is made of a magnetic material and is inserted through the winding portions of the conductors. In the housing, a mounting portion (83) for the ring-shaped core has recesses (84) that are recessed in a direction going away from the ring-shaped core and support portions (83b) that support the ring-shaped core so that gaps (S) are formed between the ring-shaped core and the bottom surfaces of the respective recesses. The sealing material goes into the gaps and comes into contact with both of the ring-shaped core and the bottom surfaces of the recesses in the mounting portion.

Claims7

Dependent claims

A noise reduction unit comprising:

a conductor having a winding portion;
a ring-shaped core made from a magnetic material and being inserted through the winding portion;
a housing holding the conductor and the ring-shaped core, the housing having, at a mounting portion for the ring-shaped core, a recess concaving in a direction away from the ring-shaped core;
and a support portion supporting the ring-shaped core to have a gap between a bottom surface of the recess and the ring-shaped core;
and
a sealing material charged in the housing, the sealing material being placed into the gap and contacting both of the bottom surface of the recess and the ring-shaped core at the mounting portion,
wherein at least part of side wall surface of the recess is inclined so that an opening space of the recess increases with distance from the bottom surface of the recess in its recessing direction.

4 more elements

Dependencies are inferred from the claim text.

Noise reduction unit

Life of this patent

Noise reduction unit

Life of this patent

Abstract

Claims7