Vehicle door lock device

Abstract

Provided is a vehicle door lock device which more reliably prevents a door from being opened by shocks and is capable of realizing higher safety of occupants. A changeover lever (13) for a door lock device (1) comprises a lever body (20), an inertia lever (30) which is provided on the lever body (20) in such a way as to be swingable about a pivot (X1) from the initial position (P1) toward the outside of the vehicle body, and a torsion coil spring (40) which is provided between the lever body (20) and the inertia lever (30). If, in the initial position (P1), the inertia lever (30) is displaced integrally with the lever (20), then the inertia lever (30) is capable of pressing a pawl (12). The torsion coil spring (40) is provided coaxially with the pivot (X1) and holds the inertia lever (30) in the initial position (P1). The torsion coil spring (40) and a mass body (31) of the inertia lever (30) are set in such a way that that if an inertial force (F1) exceeding a preset value acts on the mass body (31), then the inertia lever (30) swings from the initial position (P1), thereby avoiding pressing the pawl (12).

Description

technical field [0001] The present invention relates to a vehicle door lock device. Background technique [0002] Patent Document 1 discloses a conventional vehicle door lock device. This vehicle door lock device includes an attachment member, a fork, a pawl, and a switching lever. [0003] The attachment member is provided on a door that opens and closes in the vehicle width direction with respect to the vehicle body. A striker is fixed to the vehicle body, and an inlet through which the striker enters is formed on the mounting member. The fork is provided on the mounting member in a swingable manner. The fork is switched to a locked state which is a state in which the striker is locked in the entrance, or a released state which is a state in which the striker is released from the lock in the entrance. The claw is provided on the mounting member in a swingable manner. The pawl can fix or release the swing of the fork. [0004] The switching lever presses the claw to s...

AI Technical Summary

Problems solved by technology

Moreover, since a coil spring is provided between the switch lever and the mounting member, the swing angle of the switch lever is also limited by the coil spring

Therefore, in the conventional vehicle door lock device, it is difficult to increase the swing angle of the switching lever.

Therefore, when the switch lever swings beyond the swing angle due to an excessive impact, the switch lever bounces back and swings in the opposite direction due to the collision between the engaging claw and the side wall of the engaging hole, so that the "empty position" cannot be realized. bad situation

In this case, it is difficult for the conventional vehicle door lock device to reliably prevent the opening of the door due to the impact.

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