# US 2015/0143751 A1 · Spring hook structure

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- Number: US 2015/0143751 A1
- Document ID: US20150143751A1
- Status: Published application
- Kind: A1
- Application number: 14/611,377
- Filed: 2015-02-02
- Published: 2015-05-28
- Earliest claimed: 2012-08-06
- Assignees: Yazaki Corporation
- Applicants: Yazaki Corporation
- Inventors: Tsutomu SAWADA; Norihisa YAMADA; Takashi TSUKAMOTO
- Web page: https://patentgrep.com/patent/US20150143751A1

## CPC

- E05F 1/1008: {with a coil spring parallel with the pivot axis (E05F1/1207 takes precedence)}
- F16F 1/04: Wound springs {(making springs by coiling wire B21F3/00)}
- F16F 1/06: with turns lying in cylindrical surfaces
- F16F 1/12: Attachments or mountings {(F16F1/041, F16F13/02 take precedence; of combinations of vibration damper and mechanical spring for vehicle suspension units B60G15/02)}
- F16F 1/123: {characterised by the ends of the spring being specially adapted, e.g. to form an eye for engagement with a radial insert (F16F1/122, F16F1/125 take precedence)}
- H01R 13/447: Shutter or cover plate
- H01R 13/506: assembled by snap action of the parts
- H01R 13/5213: {Covers}
- F16F 2236/08: Torsion
- H01R 13/635: by mechanical pressure, e.g. spring force
- E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS

## Abstract

A spring hook structure includes: a torsion coil spring including a coil portion and a first arm and a second arm extending from each side of the coil portion; and a rotation support pin by which a cap is rotatably supported on an exterior case. The rotation support pin is inserted into the coil portion. The first arm is hooked on a first hook surface of the exterior case, and the second arm is hooked on a second hook surface of the cap. At least one of the exterior case and the cap is provided with a regulation wall at a position not interfering with the arm moving along the hook surface due to flexural deformation of the coil portion but interfering with the arm moving along the hook surface due to flexural deformation of the arm.

## Claims

### Claim 1

A spring hook structure interposed between a fixed member and a movable member rotatably supported on the fixed member, the spring hook structure comprising:
a torsion coil spring comprising a coil portion, a first arm extending from one side of the coil portion, and a second arm extending from the other side of the coil portion;
a rotation support pin by which the movable member is rotatably supported on the fixed member, the rotation support pin being inserted into the coil portion;
a first hook surface on which a tip portion of the first arm is hooked, the first hook surface being formed in the fixed member;
a second hook surface on which a tip portion of the second arm is hooked, the second hook surface being formed in the movable member;
a first regulation wall placed in the fixed member at a position not interfering with the tip portion of the first arm moving along the first hook surface when the coil portion is subjected to flexural deformation but interfering with the tip portion of the first arm moving along the first hook surface when the first arm is subjected to flexural deformation; and
a second regulation wall placed in the movable member at a position not interfering with the tip portion of the second arm moving along the second hook surface when the coil portion is subjected to flexural deformation but interfering with the tip portion of the second arm moving along the second hook surface when the second arm is subjected to flexural deformation, wherein
when the movable member rotates about the rotation support pin, the first regulation wall prevents the tip portion of the first arm from moving along the first hook surface once the tip portion of the first arm starts moving along the first hook surface while the first arm is subjected to the flexural deformation, and the second regulation wall prevents the tip portion of the second arm from moving along the second hook surface once the tip portion of the second arm starts moving along the second hook surface while the second arm is subjected to the flexural deformation.

### Claim 2 (depends on 1)

The spring hook structure according to claim 1, wherein the fixed member is an exterior case placed to cover a peripheral surface of a connector housing, and the movable member is a cap placed to open and close a terminal insertion hole in the connector housing.