# US 5,703,279 A · Waterproofness checking jig for a waterproof connector

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- Number: US 5,703,279 A
- Document ID: US5703279A
- Status: Granted
- Kind: A
- Application number: 08/748,662
- Filed: 1996-11-14
- Granted: 1997-12-30
- Earliest claimed: 1995-02-17
- Assignees: Yazaki Corporation
- Inventors: Toshinori Igura; Masaru Fukuda
- Web page: https://patentgrep.com/patent/US5703279A

## CPC

- H01R 13/5219: {Sealing means between coupling parts, e.g. interfacial seal}
- G01M 3/26: by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01R 31/69: of terminals at the end of a cable or a wire harness; of plugs; of sockets, e.g. wall sockets or power sockets in appliances
- H01R 43/005: {for making dustproof, splashproof, drip-proof, waterproof, or flameproof connection, coupling, or casing}
- H01R 2201/20: for testing or measuring purposes
- Y10S 439/912: with testing means
- Y10T 29/49004: including measuring or testing of device or component part
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A waterproof connector is checked for waterproofness, which waterproof connector has a terminal-accommodating chamber into which a terminal is inserted and which is sealed with a waterproofing rubber stopper through which an insulated wire attached to the terminal passes. A connector-holding block of a waterproofness-checking jig engages in a watertight manner with the connector-fitting side of the waterproof connector, followed by depressurizing the waterproof connector with an ejector and comparing the pressure inside the waterproof connector with a reference pressure to determine the presence or non-presence of a leakage. Owing to the depressurization of the waterproof connector, the terminal, if inserted incomplete, is moved into a fully-inserted position in the connector housing in one piece with the waterproofing rubber stopper. A waterproof connector can be easily and reliably checked for waterproofness without making errors, while remedying incomplete insertion of a terminal.

## Claims

### Claim 1

A waterproofness checking jig for holding a waterproof connector comprising a connector housing with a terminal-accommodating chamber formed therein into which a terminal attached to an end of an insulated wire has been inserted from a first side of said connector housing, said terminal-accommodating chamber having been sealed by a waterproofing rubber stopper through which said insulated wire passes, said waterproofing checking jig comprising:
a framing;
a sub-holding block provided at one end of said framing for supporting said first side of said connector;
a connector-holding block provided slidable between said sub-holding block and the other end of said framing for engaging and holding in a watertight manner a second side of said connector at which said connector is fitted with a mating connector;
an air pipeway connected to said connector-holding block for depressurizing and pressurizing said connector through said connector-holding block; and
a rotatable lever provided with a toggle mechanism for moving said connector-holding block forwardly and backwardly between said sub-holding block and said the other end of said framing.