# US 2014/0190744 A1 · Terminal waterproofing structure of wire harness

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- Number: US 2014/0190744 A1
- Document ID: US20140190744A1
- Status: Published application
- Kind: A1
- Application number: 14/239,673
- Filed: 2012-02-27
- Published: 2014-07-10
- Earliest claimed: 2011-09-21
- Assignees: Sumitomo Wiring Systems, Ltd.
- Inventors: Ryo Fuzioka
- Web page: https://patentgrep.com/patent/US20140190744A1

## CPC

- H01R 4/20: using a crimping sleeve {(H01R4/01 takes precedence)}
- B60R 16/0222: {Grommets}
- H01B 7/2825: {using a water impermeable sheath}
- H02G 3/088: {Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets}
- H02G 3/32: using mounting clamps
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES

## Abstract

A terminal waterproofing structure for a wire harness is provided, including a front end side of a tubular braided shielding member covering the wire harness overlaid on a tubular part of a shield shell, and fixed by crimping with a first crimp ring, and a tubular grommet made from an elastic member externally fitted to the tubular part of the shield shell that projects beyond a front end of the tubular braided shielding member while covering the section of the tubular braided shielding member that is fixed. The front end abuts on a flange part and the outer periphery of the grommet on the front end side is fixed by crimping with a second crimp ring. An annular sealing rib protrudes from the inner periphery of the grommet and a recess into which the annular sealing rib is press-fit is provided on the outer periphery.

## Claims

### Claim 1

A terminal waterproofing structure for a wire harness to be routed in an electric car or a hybrid car, the wire harness being constituted by a plurality of high-voltage electrical power lines, the terminal waterproofing structure comprising:
a front end side of a tubular braided shielding member covering the wire harness overlaid on a tubular part of a shield shell and fixed by crimping with a first crimp ring, the shield shell having a flange part protruding from the front end side of the tubular part,
a tubular grommet made from an elastic member externally fitted to the tubular part of the shield shell that projects beyond a front end of the tubular braided shielding member while covering the portion of the tubular braided shielding member fixed by crimping,
a front end of the grommet abutting on the flange part of the shield shell, and the outer periphery of the grommet on the front end side fixed by crimping with a second crimp ring,
between the fixation position with the second crimp ring and the fixation position with the first crimp ring, an annular sealing rib (i) protruding from the inner periphery of the grommet and a recess into which the annular sealing rib is press-fit and (ii) provided on the outer periphery of the tubular part of the shield shell, and
wherein the second crimp ring, the annular sealing rib, and the first crimp ring constitute a three-tiered waterproofing section.

### Claim 2 (depends on 1)

The terminal waterproofing structure according to claim 1, wherein
the outer surfaces on both sides of the annular sealing rib provided on the grommet are in contact with the inner surfaces on both sides of the recess, and one or more lips protrude from a projecting end face of the annular sealing rib, the lips being pressed against the bottom of the recess.

### Claim 3 (depends on 1)

The terminal waterproofing structure according to claim 1,
wherein, between the recess and the fixation position with the first crimp ring, a small annular rib that is pressed against the inner periphery of the grommet is provided on the outer periphery of the tubular part of the shield shell.

### Claim 4 (depends on 1)

The terminal waterproofing structure according to claim 1,
wherein the other end of the grommet is overlaid on a front end of a corrugated tube or a metal pipe through which the wire harness is inserted, and is fixed by winding a tape, fastened by a fastening band, or fixed by crimping with a crimp ring.

### Claim 5 (depends on 2)

The terminal waterproofing structure according to claim 2,
wherein, between the recess and the fixation position with the first crimp ring, a small annular rib that is pressed against the inner periphery of the grommet is provided on the outer periphery of the tubular part of the shield shell.

### Claim 6 (depends on 2)

The terminal waterproofing structure according to claim 2,
wherein the other end of the grommet is overlaid on a front end of a corrugated tube or a metal pipe through which the wire harness is inserted, and is fixed by winding a tape, fastened by a fastening band, or fixed by crimping with a crimp ring.