JPH0119028B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a door lock device for an automobile, and in particular to a door lock device that is designed to make it difficult for a lock striker to slip out of the lock position when a load is applied in the direction of opening the door at the half-lock position.

Conventionally, in an automobile door lock device, as shown in FIGS. 1 to 3, when the door is operated in the closing direction, a groove 1a cut out in the cover plate 1 of the door
A striker 2 protruding from the vehicle body side is inserted into the door, and the striker 2 engages with a U-shaped groove 3a of a latch member 3 rotatably supported on the door side, and while rotating the latch member 3, the striker 2 is inserted into the groove 3a. When the latch member 3 is inserted and rotated to the half position, the locking portion 3b of the two locking portions 3b and 3c formed on the latch member 3 is biased by a spring toward the door side, and the latch member 3 is rotatably supported. The locking member 4 is engaged to prevent return rotation of the latch member 3 and to hold the striker 2 in the half-locked position shown. Furthermore, close the door and move the striker 2 to the groove 1a.
When inserted, the latch member 3 is rotated to the full position, and the locking member 4 is engaged with the locking portion 3c to hold the striker 2 at the full lock position.

In the door lock device having the above structure, the latch member 3
is made of a metal material to provide strength, and in the half-locked position, the groove 3a of the latch member 3 is in the state shown in the figure, and the groove 3a is approximately perpendicular to the groove 1a of the cover plate 1. In addition, since the side 3d on the entrance side of the groove 3a is inclined to facilitate engagement with the striker, a load is applied in the direction of opening the door (that is, in the direction of the striker 2 coming out). Then, the striker 2 moves on the wall surface of the groove 3a of the latch member 3 and comes into contact with the wall surface of the groove 1a of the cover plate 1,
When a stronger load was applied, that is, in a strength test, the cover plate 1 was pushed and bent at a load of 136% of the standard, and the striker 2 sometimes came off. Therefore, it is necessary to increase the strength of the cover plate 1, and the plate thickness and the dimension L from the tip to the side edge of the groove 1a are restricted to more than a predetermined value, which has the drawback of increasing the weight and size of the cover plate 1. It was hot.

This invention aims to solve the above-mentioned drawbacks, and in order to prevent the striker from slipping out at the half-lock position, a convex portion is formed at the entrance on the striker holding side of the groove of the latch member, and a convex portion is formed along the wall surface of the groove. An elastic resin material is attached to make it difficult for the striker to move along the wall of the groove, and a latch member securely holds the striker to improve safety.The cover plate also reduces the load applied to the cover plate. An object of the present invention is to provide a door lock device for an automobile, which is characterized in that it can be made thin and compact.

Hereinafter, this invention will be explained in detail with reference to the embodiments shown in FIG. 4 and below.

10 is a base on the door side, 11 is a cover plate attached to the base 10 with a mounting screw 12, 13 is a latch member rotatably supported on the base 10 with a support shaft 14, and 15 is rotated on the base 10 via a support shaft 16. It is a freely supported locking member that is biased in the direction of the arrow in the figure by a spring (not shown) and is restricted by a stop rubber 17. 18 is a striker protruding from the vehicle body side.

A horizontal groove 11a is cut out from one side end of the cover plate 11, and the side end opening 1
1b is inclined to make the width wider.

The latch member 13 has a fork shape with a U-shaped groove 13a cut out, and a protrusion 13b protruding inward at the entrance of the groove 13a on the striker holding side.
is formed. A groove 13 is provided on the opposite side of the convex portion 13b.
a, and a second locking portion 13d formed with a first locking portion 13c that is tapered outward continuously from the first locking portion 13c, and a second locking portion 13d that is concavely notched laterally at a predetermined distance from the first locking portion 13c. is formed. The above U-shaped groove 13a
An elastic resin material 20 is attached along the wall surface. The elastic resin material 20 is attached along the groove wall surface from the inner side of the groove at the tip of the convex portion 13b with a width that is at the same height as the tip, and the entire wall surface of the groove 13a (including the elastic resin material 20) is attached. ) There are no irregularities as a whole from the entrance side. Furthermore, the groove 13a
The above-mentioned elastic resin material is not attached to the first locking portion 13c which is continuous to the first locking portion 13c.

As mentioned above, the groove 1 that engages with the striker 18
3a, a convex portion 13b is formed on the striker inlet side and an elastic resin material 20 is attached along the groove wall surface, so that when the door is closed from the door open position shown in FIG. 4, the opening shown in FIG. As shown, the striker 18 is inserted into the groove 11a of the cover plate 11, engages with the groove 13a of the latch member 13, rotates the latch member 13 counterclockwise, and engages the convex portion 15a of the lock member 15 with the second locking portion 13d. is locked,
It becomes a half-locked state. When the striker 18 engages with the groove 13a of the latch member 13, the convex portion 13
Since the tip of b and the surface of the elastic resin material 20 are at the same height and have no unevenness, the striker 18 can fit into the groove 13a without resistance, and the striker 1 can fit inside the groove 13a.
8 comes into contact with the elastic resin material 20 when it moves, so there is little generation of abnormal noise.

At the half-locked position, when a force is applied to the door in the opening direction and the striker 18 attempts to move in the exit direction from the groove 13a, the elastic resin material 20 in contact with the striker 18 bites into the entrance of the groove. The striker 18 is recessed to prevent movement of the striker 18, and even if a stronger force is applied and the striker 18 moves toward the entrance side of the groove 13a, the striker 18 is retained by the convex portion 13b and does not shift downward. Therefore, the striker 18 and the latch member 1
The mesh with 3 cannot be separated. Therefore, the striker 18 comes out of the groove 13a and the cover plate 1
It is possible to prevent the cover plate 11 from moving along the groove 11a of the cover plate 11 and applying a strong load to the cover plate 11.

As a result of the strength test, no striker 18 came off when the cover plate 11 was pushed and bent, and the latch member cracked at 261% of the standard.

When the door is further closed from the half-locked position, the striker 18 enters the groove 11a, rotates the latch member 13, and the convex portion 15a of the locking member 15 locks with the first locking portion 13c. The state becomes fully locked as shown in the figure.

It should be noted that this invention is not limited to the above embodiments, and the seventh embodiment
As shown in the figure, the first locking portion 1 of the latch member 13'
Elastic resin materials 20'a and 20'b are attached to the sliding surface of the lock member between 3'c and the second locking part 13'd, and also to the outside of the second locking part 13'd. The generation of abnormal noise may be suppressed.

As is clear from the above description, according to the door lock device of the present invention, the groove of the latch member that engages with the striker is provided with a convex portion on the striker holding side, and the tip of the convex portion is formed along the wall surface of the groove. Since the thick elastic resin material is attached at approximately the same height, the striker is reliably prevented from slipping out of the groove of the latch member at the half-lock position, and the lock does not come off, improving safety. When the striker comes out of the groove of the latch member, it can be prevented from getting caught on the convex part or hitting the convex part and producing abnormal noise, and it can be made to come out smoothly. In addition, even if a convex portion is formed at the inlet portion on the striker holding side, since the elastic resin material is attached along the groove wall surface, the gap between the striker and the groove is small, and rattling can be reduced accordingly. In addition, since the striker does not slip out of the groove of the latch member and press the groove of the cover plate, the strength of the cover plate is not restricted, and the cover plate can be made thinner and lighter and smaller. can. Furthermore, since the striker comes into contact with the elastic resin material when the striker engages with the groove of the latch member, there are advantages such as no abnormal noise being generated and a good operational feel.

[Brief explanation of drawings]

Figure 1 is a side view showing a conventional door lock device;
2 and 3 are schematic diagrams showing the drawbacks of the conventional device, and FIG. 4 is a side view of the door lock device according to the present invention.
Figure 5 is a side view of Figure 4 when the lock is half-locked;
The figure is a side view when fully locked, and FIG. 7 is a schematic diagram showing a modification of the invention. DESCRIPTION OF SYMBOLS 11... Cover plate, 11a... Groove, 13... Latch member, 13a... Groove, 13b... Convex part, 13c...
First locking portion, 13d...Second locking portion, 15...Lock member, 18...Striker, 20...Elastic resin material.

Claims (1)

[Scope of Claims] 1. When the striker engages with the U-shaped groove formed in the latch member and rotates the latch member, the locking member engages with the latch member, disabling the return rotation of the latch member and causing the striker to rotate. In a door lock device that is held in a locked position, a protrusion protruding toward the outer circumference of the striker is formed at the entrance portion of the groove of the latch member on the striker holding side, and the protrusion is approximately at the same height as the tip of the protrusion. A door lock device characterized in that a thick elastic resin material is attached along the wall surface of the groove so that it bites into the entrance portion of the groove when a withdrawal force is applied to the striker.