# US 8,784,133 B2 · Connector

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- Number: US 8,784,133 B2
- Document ID: US8784133B2
- Status: Granted
- Kind: B2
- Application number: 13/816,573
- Filed: 2011-04-21
- Published: 2013-06-06
- Granted: 2014-07-22
- Earliest claimed: 2010-09-01
- Assignees: Sumitomo Wiring Systems, Ltd.
- Applicants: Masakazu Suzuki
- Inventors: Masakazu Suzuki
- Web page: https://patentgrep.com/patent/US8784133B2

## CPC

- H01R 13/516: Means for holding or embracing insulating body, e.g. casing {, hoods}
- H01R 13/4223: {comprising integral flexible contact retaining fingers}
- H01R 13/4364: {Insertion of locking piece from the front}
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS

## Abstract

A terminal fitting is inserted into a terminal holding chamber of a front member. A guide recess is in an opposing wall face opposing a lance, of inner faces of a terminal accommodation chamber, an escape recess continuous with the guide recess is in a receiving face of the terminal holding chamber, a guide projection protruding from a position rearward of the front end of an angular tube portion and making sliding contact with a bottom face of the guide recess is in an opposing outer face of the angular tube portion. The length from the guide projection to the front end of the angular tube portion is larger than the distance between the front end of the guide recess and the rear end of the receiving face, and the height of the receiving face relative to the bottom face is smaller than the height of the opposing outer face.

## Claims

### Claim 1

A connector comprising:
a housing in which a terminal accommodation chamber is formed; and
a front member that is configured to be attached to a front end portion of the housing,
wherein, in a state in which the front member is attached to the housing, a terminal holding chamber in a recess form in a rear face of the front member is located so as to correspond to an opening at a front end of the terminal accommodation chamber, so that a cavity is formed by the terminal accommodation chamber and the terminal holding chamber,
in a process of inserting a terminal fitting into the cavity from behind, a lance formed along an inner wall of the terminal accommodation chamber interferes with an angular tube portion of the terminal fitting and thus temporarily bends elastically in a direction intersecting an insertion direction of the terminal fitting,
when the terminal fitting is properly inserted and a front end portion of the angular tube portion is accommodated in the terminal holding chamber, the lance that has elastically returned engages with the angular tube portion so as to prevent the angular tube portion from disengaging from the lance,
a guide recess extending in the insertion direction of the terminal fitting is formed in an opposing wall face of inner wall faces of the terminal accommodation chamber, the opposing wall face opposing the lance,
an escape recess disposed in alignment with the guide recess with a space left therebetween is formed in a receiving face of inner faces of the terminal holding chamber, the receiving face being disposed in alignment with the opposing wall face with a space left therebetween,
a guide projection protruding from a position rearward of a front end of the angular tube portion in the insertion direction of the terminal fitting and being capable of making sliding contact with a bottom face of the guide recess is formed in an opposing outer face of outer faces of the angular tube portion, the opposing outer face opposing the opposing wall face and the receiving face,
in order for the front end portion of the angular tube portion to oppose the receiving face of the terminal holding chamber before a vertex portion of the guide projection reaches a front end of the guide recess, in the insertion direction of the terminal fitting, a length from the guide projection to the front end of the angular tube portion is set to be larger than a distance between the front end of the guide recess and a rear end of the receiving face, and
in an elastic bending direction of the lance, a height of the receiving face relative to the bottom face of the guide recess is set to be smaller than a height of the opposing outer face relative to the bottom face of the guide recess.

### Claim 2 (depends on 1)

The connector according to claim 1,
wherein a displacement restricting portion is formed in at least one of the housing and the front member, the displacement restricting portion being elastically deformed in the state in which the front member is attached to the housing, thereby restricting relative displacement between the housing and the front member in the direction intersecting the insertion direction of the terminal fitting.