Electromagnetic shielding component and electric wire assembly with electromagnetic shielding component

Patent metadata

Field	Value
Publication number	US-9743567-B2
Application number	US-201515116906-A
Country	US
Kind code	B2
Filing date	Jan 20, 2015
Priority date	Feb 6, 2014
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

An object is to prevent electric wires from being brought into contact with, and being damaged by, an edge of a rigid pipe of an electromagnetic shielding component, without need for an additional component such as a cover for an end portion of the pipe, despite the increased density of the electric wires within a hollow space in the pipe. A shielding pipe includes an expanded-diameter portion that is an end portion whose inner and outer circumferential surfaces each have a diameter that is greater than diameters of inner and outer circumferential surfaces of a portion that is contiguous with the expanded-diameter portion. A ring-shaped coupling member holds an overlapping portion of a flexible shielding member, the overlapping portion being sandwiched between the coupling member and the inner circumferential surface of the shielding pipe. The overlapping portion overlaps the inner circumferential surface of the expanded-diameter portion.

First claim

The invention claimed is:

1. An electromagnetic shielding component comprising:
a shielding pipe that is tubular, contains metal material, is rigid, and includes an expanded-diameter portion that is an end portion whose inner circumferential surface and outer circumferential surface each have a diameter that is greater than diameters of an inner circumferential surface and an outer circumferential surface of a portion that is contiguous with the expanded-diameter portion;
a flexible shielding member that is tubular, contains metal material, is flexible, includes an overlapping portion that is a portion in an end region and that overlaps the inner circumferential surface of the expanded-diameter portion of the shielding pipe, and is configured to provide a continuous hollow space together with the shielding pipe;
a coupling member that is ring-shaped, and holds the overlapping portion of the flexible shielding member, the overlapping portion being sandwiched between the coupling member and the inner circumferential surface of the shielding pipe; and
a grommet that is a non-conductive tubular elastic member, and includes, in an end region thereof, a portion that encloses a portion of the shielding pipe, and whose inner circumferential surface, when the grommet is in a natural state, has a diameter that is greater than a diameter of the outer circumferential surface of the portion contiguous with the expanded-diameter portion of the shielding pipe, and that is smaller than a diameter of the outer circumferential surface of the expanded-diameter portion.

2. The electromagnetic shielding component according to claim 1 ,
wherein an inner circumferential surface of the coupling member has a diameter that is greater than or equal to a diameter of the inner circumferential surface of the portion contiguous with the expanded-diameter portion of the shielding pipe.

3. The electromagnetic shielding component according to claim 1 ,
wherein the shielding pipe includes a metal pipe and an insulating coating formed on an outer circumferential surface of the metal pipe.

4. The electromagnetic shielding component according to claim 1 ,
wherein the grommet includes an intermediate portion that is a portion between two ends of the grommet, and that has a diameter that is greater than the diameter of the outer circumferential surface of the expanded-diameter portion when the grommet is in the natural state.

5. An electric wire assembly with electromagnetic shielding component, comprising:
an electric wire; and
an electromagnetic shielding component that is tubular and encloses the electric wire,
wherein the electromagnetic shielding component includes:
a shielding pipe that is tubular, contains metal material, is rigid, and includes an expanded-diameter portion that is an end portion whose inner circumferential surface and outer circumferential surface each have a diameter that is greater than diameters of an inner circumferential surface and an outer circumferential surface of a portion that is contiguous with the expanded-diameter portion;
a flexible shielding member that is tubular, contains metal material, is flexible, includes an overlapping portion that is a portion in an end region and that overlaps the inner circumferential surface of the expanded-diameter portion of the shielding pipe, and is configured to provide a continuous hollow space for the electric wire to pass through, together with the shielding pipe;
a coupling member that is ring-shaped, and holds the overlapping portion of the flexible shielding member, the overlapping portion being sandwiched between the coupling member and the inner circumferential surface of the shielding pipe; and
a grommet that is a non-conductive tubular elastic member, and includes, in an end region thereof, a portion that encloses a portion of the shielding pipe, and whose inner circumferential surface, when the grommet is in a natural state, has a diameter that is greater than a diameter of the outer circumferential surface of the portion contiguous with the expanded-diameter portion of the shielding pipe, and that is smaller than a diameter of the outer circumferential surface of the expanded-diameter portion.

Assignees

• Autonetworks Technologies Ltd
• Sumitomo Wiring Systems
• Sumitomo Electric Industries

Inventors

• ITANI Yasushi

Classifications

• H01R13/6592

  the conductive member being a shielded cable · CPC title

• H05K9/0018

  with provisions to reduce aperture leakages in walls, e.g. terminals, connectors, cables · CPC title

• H02G3/0462

  Tubings, i.e. having a closed section · CPC title

• H05K9/0098 Primary

  for shielding electrical cables · CPC title

• H02G3/06

  Joints for connecting lengths of protective tubing {or channels}, to each other or to casings, e.g. to distribution boxes; Ensuring electrical continuity in the joint · CPC title