# US 11,299,917 B2 · Vehicle door latch device

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- Number: US 11,299,917 B2
- Document ID: US11299917B2
- Status: Granted
- Kind: B2
- Application number: 15/950,697
- Filed: 2018-04-11
- Published: 2018-11-01
- Granted: 2022-04-12
- Earliest claimed: 2017-04-29
- Assignees: Mitsui Kinzoku Act Corporation
- Applicants: Mitsui Kinzoku Act Corporation
- Inventors: Takao Taga
- Web page: https://patentgrep.com/patent/US11299917B2

## CPC

- E05B 77/265: {hand actuated, e.g. by a lever at the edge of the door}
- E05B 2015/0493: {Overcenter springs}
- E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS

## Abstract

An over-center spring of a vehicle door latch device has a coil part that is loosely inserted on a spring support shaft, and a base end side spring leg part. A leading end side spring leg part elastically holds an abutting pin and is paired with the base end side spring leg part. A lock lever is provided with a slot through which the spring support shaft passes. The lock lever and the spring support shaft are disposed to be superposed on each other in an axial direction of the spring support shaft.

## Claims

### Claim 1

A vehicle door latch device comprising:
a lock lever that is pivotably secured to a housing case with a lock shaft;
an abutting pin that is provided in said lock lever;
a spring support shaft that is provided in said housing case; and
an over-center spring having a coil part that is loosely inserted on said spring support shaft, and a base end side spring leg part and a leading end side spring leg part that extend in a direction away from said coil part, elastically hold said abutting pin therebetween, and are paired,
wherein the base end side spring leg part and the leading end side spring leg part are in contact with one side of the abutting pin and an opposite side thereto of the abutting pin, respectively,
said lock lever is provided with a slot through which said spring support shaft passes, and
said lock lever and said spring support shaft are disposed to be superposed on each other in an axial direction of said spring support shaft.

### Claim 2 (depends on 1)

The vehicle door latch device according to claim 1, wherein
said slot is formed in an arc shape with said lock shaft as a center.

### Claim 3 (depends on 1)

The vehicle door latch device according to claim 1, wherein
a child lever that is switched between a childproof set position and a childproof unset position is pivotably secured to said lock shaft.