# US 11,444,410 B2 · Waterproof structure for multicore wire

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- Number: US 11,444,410 B2
- Document ID: US11444410B2
- Status: Granted
- Kind: B2
- Application number: 17/251,984
- Filed: 2019-05-30
- Published: 2021-08-12
- Granted: 2022-09-13
- Earliest claimed: 2018-06-15
- Assignees: Sumitomo Wiring Systems, Ltd.
- Applicants: Sumitomo Wiring Systems, Ltd.
- Inventors: Moriyuki Shimizu; Yukitoshi Terasaka; Toshinari Kobayashi; Hironobu Yamamoto; Kyungwoo Kim
- Web page: https://patentgrep.com/patent/US11444410B2

## CPC

- H01R 13/521: {Sealing between contact members and housing, e.g. sealing insert}
- H01B 7/2825: {using a water impermeable sheath}
- H01R 13/5208: {having at least two cable receiving openings}
- H01R 13/5845: {the strain relief being achieved by molding parts around cable and connections}
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- 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})

## Abstract

Provided is a waterproof structure for a multicore wire capable of enhancing waterproofness. The waterproof structure includes a multicore wire in which a plurality of core wires are housed in a sheath, a housing in which is housed a terminal fitting connected to a terminal portion of the core wires, and in which is formed an opening through which the core wires are externally extracted, a molded part covering the opening and covering an end face of the sheath, and a resin stopper part disposed on an inner side of the molded part inside the opening.

## Claims

### Claim 1

A waterproof structure for a multicore wire, comprising:
a multicore wire in which a plurality of core wires are housed in a sheath;
a housing in which is housed a terminal fitting connected to a terminal portion of the core wires, the housing including a tower part, the tower part being a cylindrical member having a through hole so as to define an opening through which the core wires are externally extracted;
a molded part covering the opening and covering an end face of the sheath, the molded part including an outer circumferential part spaced apart from and concentric to an inner circumferential part so as to define a circumferential slit, the tower part inserted into the circumferential slit; and
a resin stopper part disposed on an inner side of the molded part inside the opening.

### Claim 2 (depends on 1)

The waterproof structure for a multicore wire according to claim 1, wherein a melt part formed on an outer edge of the tower part and seated within the circumferential slit, the melt part configured to melt during molding of the molded part.

### Claim 3 (depends on 1)

The waterproof structure for a multicore wire according to claim 1, wherein the molded part includes a bent part that holds the multicore wire in a bent shape.

### Claim 4 (depends on 1)

The waterproof structure for a multicore wire according to claim 1, wherein the outer circumferential part covers an outer circumferential surface of the housing.

### Claim 5 (depends on 1)

The waterproof structure for a multicore wire according to claim 1, wherein the resin stopper part is an existing rubber plug.

### Claim 6 (depends on 5)

The waterproof structure for a multicore wire according to claim 5, wherein a stopper surface opposing a surface on an inner side of the resin stopper part is formed in the housing.

### Claim 7 (depends on 2)

The waterproof structure for a multicore wire according to claim 2, wherein the molded part includes a bent part that holds the multicore wire in a bent shape.

### Claim 8 (depends on 2)

The waterproof structure for a multicore wire according to claim 2, wherein the outer circumferential part covers an outer circumferential surface of the housing.

### Claim 9 (depends on 3)

The waterproof structure for a multicore wire according to claim 3, wherein the molded part includes an outer circumferential part covering an outer circumferential surface of the housing.

### Claim 10 (depends on 2)

The waterproof structure for a multicore wire according to claim 2, wherein the resin stopper part is an existing rubber plug.

### Claim 11 (depends on 3)

The waterproof structure for a multicore wire according to claim 3, wherein the resin stopper part is an existing rubber plug.

### Claim 12 (depends on 4)

The waterproof structure for a multicore wire according to claim 4, wherein the resin stopper part is an existing rubber plug.