JPH0329950B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an automobile door lock device.

(Prior art) The structure of a conventionally known prior art automobile door lock device is as shown in FIGS. A back plate also made of a metal plate, the cover plate A is located on the front side, the back plate is located on the back side,
A synthetic resin body C is provided between each plate A and B. A recess D is formed on the surface side of the synthetic resin body C, and a latch E is pivotally mounted within the recess D by a shaft F. G is a striker fixed to the vehicle body side, H is a latch that engages with the striker G to prevent the rotating latch E from reversing, and I
is a wall formed on the body C on the entry/exit side of the striker G.

[Problem to be solved by the invention]

In the known lock device, when the door is closed, a striker G fixed to the vehicle body and a latch E on the door lock body fixed to the door engage. The engagement is
It is locked by operating the internal seal knob, but even if it is locked, if a strong impact load is applied in the direction of opening the door, as in the case of an accident, etc.
In an attempt to open the door, the striker G is pulled strongly in the exit direction, and the latch E engaged with the striker G is pulled out from the recess D of the synthetic resin body C in a locked state, and the door cannot be opened. There is.

As a countermeasure, the wall surface I on the entry/exit side of the synthetic resin body C must be made excessively thick to prevent the latch E from slipping out, but if this method is used, the door lock body side will be large and narrow. It cannot be installed inside the door.

However, if a part of the cover plate A, which is a metal plate that makes up the door lock body, is processed, the latch E
The latch E can be prevented from coming off without increasing the size of the door lock body.

(Object of the Invention) The present invention is capable of preventing the latch from coming off without making the wall surface on the entrance/exit side of the synthetic resin body unnecessarily oversized, and also increases the strength of the lock body side. It is something that we try to do.

(Means for Solving the Problems) Therefore, the present invention provides a cover plate 1 made of a metal plate provided on the front surface, a back plate 2 made of a metal plate provided on the back side, and the cover plate 1 and the back plate 2. a body 3 made of synthetic resin provided between the body 3, a striker 4 fixed to the vehicle body side, a latch 5 pivotally supported within the body 3 and engaged with the striker 4, and the body 3.
In the automobile door lock device, the entrance groove 14 for the striker 4 is formed in the cover plate 1, and the entrance groove 14' for the striker 4 is formed in the cover plate 1. At the entrance and exit part of
A part of the cover plate 1 is bent at right angles to the back side to form a latch retaining part 16a, and the latch retaining part 16a has a plate surface shape parallel to the advancing direction A of the striker 4. The structure of the automobile door lock device is characterized in that the length c of the bent joint portion 23 at the boundary between the cover plate 1 and the cover plate 1 is larger than the plate thickness b of the cover plate 1.

(Example) To explain the embodiment of the present invention with the drawings, 1 is a cover plate made of a metal plate on the front side, 2 is a back plate on the back side also made of a metal plate, and a synthetic resin is used between each plate 1 and 2. The body 3 made of

4 is a striker fixed to the vehicle body side, and 5 is a latch that engages with the striker 4. The latch 5
is a recess 6 formed on the front side (front side) of the body 3
A shaft 7 is attached to the shaft 7. Reference numeral 8 indicates an engagement groove formed on the outer circumference of the latch 5 in which the striker 4 engages, 9 indicates a half-door engagement step formed on the outer circumference of the latch 5, and 10 indicates an engagement groove formed on the outer circumference of the latch 5. This is a fully formed door engagement step.

Reference numeral 11 designates a ratchet whose pawls 12 sequentially engage the respective engagement steps 9 and 10 to prevent the latch 5 from being reversed. 13 is a shaft to which the ratchet 11 is mounted.

14 is an entry groove for the striker 4 formed in the body 3; an entry groove 14' having the same shape as the entry groove 14 is also formed in the cover plate 1;
The striker 4 enters the entry groove 14 and the entry groove 14' and engages the latch 5 in the body 3.

Therefore, on the entrance/exit side 22 of the striker 4 of the cover plate 1, the entrance groove 14'
A latch prevention portion 16a is formed on the upper side edge 15 by bending a portion of the cover plate 1 at right angles to the body 3 side.

The latch retaining portion 16a is formed by being bent along a bending joint 23 that is substantially parallel to the direction of entry A of the cover plate 1 and the striker 4, The length c is made larger than the thickness b of the cover plate 1.

In the embodiment shown in FIG. 6, a reinforcing bent portion 19 is provided on the rear end edge 18 of the latch retaining portion 16a. In the embodiment shown in FIG.
Edge 18 on the back side of 6a (back plate 2 side)
A reinforcing bent portion 19 is provided which hangs down.

In the figure, 20 is an open lever, 21 is a locking lever, and 24 is a side wall on the entrance/exit side 22 of the body 3.

(Function) Since the present invention is as described above, when the door is closed, the striker 4 attached to the vehicle body enters the entry groove 14 and the entry groove 14' and enters the engagement groove 8 of the latch 5 in the body 3. When engaged, the latch 5 is rotated from the state shown in FIG. 3 to the state shown in FIG. In this state, if you operate the lock knob inside the car, it will be locked.

However, even if the lock knob is operated and locked as described above, if a large load is applied to the door in the opening direction due to an accident or the like, the latch 5 will remain locked and will not come out of the locking device body. However, in the present invention, on the entrance/exit side 22 portion of the entrance groove 14' of the striker 4 of the cover plate 1,
A latch retaining portion 16a is formed by bending a portion of the cover plate 1 at right angles to the back side, and
The latch retaining portion 16a has a plate surface parallel to the advancing direction A of the striker 4, and the length c of the bent joint portion 23 at the boundary between the latch retaining portion 16a and the cover plate 1 is longer than the cover plate 1. Since the plate thickness b is larger than that of the latch 5, the movement of the latch 5 itself in the withdrawal direction can be sufficiently absorbed even if the side wall 24 on the entry/exit side 22 of the body 3 is formed thin as before. .

The known lock device is designed to prevent the latch E from coming off the synthetic resin body C when a strong load is applied to the door and the striker G is pulled strongly in the direction of removal. The wall I had to be made more oversized than necessary.

However, the present invention has a cover plate 1 made of a metal plate provided on the front side, a back plate 2 made of a metal plate provided on the back side, and a synthetic resin made plate provided between the cover plate 1 and the back plate 2. A body 3, a striker 4 fixed to the vehicle body side, a latch 5 that is pivotally supported within the body 3 and engages with the striker 4, an entry groove 14 for the striker 4 formed in the body 3, and the cover plate. In the automobile door lock device, the entrance/exit portion of the entry groove 14' for the striker 4 of the cover plate 1 includes:
A part of the cover plate 1 is bent at right angles to the back side to form a latch retaining part 16a, and the latch retaining part 16a has a plate surface shape parallel to the advancing direction A of the striker 4. Since the structure of the automobile door lock device is characterized in that the length c of the bent joint portion 23 at the boundary between the cover plate 1 and the cover plate 1 is larger than the thickness b of the cover plate 1, the metal A part of the metal cover plate 1 is bent at right angles to the back side to form a latch retaining portion 16a at the entrance/exit portion of the entry groove 14' of the striker 4 of the cover plate 1, so that the latch 5 is prevented from being pulled out. The latch contacts the latch retaining portion 16a, which is integrally constructed with the metal cover plate 1, and prevents the latch from being pulled out.

When a part of the metal cover plate 1 is bent at right angles to the back side to form a latch retaining part, the latch retaining part is bent in a direction perpendicular to the striker advancing direction A, and the latch retaining part is bent in a direction parallel to the striker advancing direction A. There are two ways to bend the latch retaining part 16a, but if it is bent in a direction parallel to the striker advancing direction A, the length of the bent joint part 23 can be increased as shown in Figure 6c. , the resistance to locking the latch becomes even stronger.

Furthermore, since the latch retaining portion 16a is simply formed by bending a part of the metal cover plate 1, this process can be done at the same time as press forming the other parts, so almost no cost is required.

Further, since the latch release prevention device of the present invention can be achieved without enlarging the synthetic resin body 3, it can be formed to have the same size as the conventional door lock device main body.

This effect is achieved.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of a known example, Fig. 2 is a - sectional view of Fig. 1, Fig. 3 is a longitudinal sectional front view of the door in the open state when using the embodiment of Fig. 7, and Fig. 4 is a longitudinal sectional view of the known example. Fig. 3 is a longitudinal sectional front view when the door is closed, Fig. 5 is a rear view, Fig. 6 is a rear perspective view of the cover plate, Fig. 7 is another embodiment of Fig. 6, and Fig. 8 is a rear perspective view of the cover plate, latch, and ratchet. Explanation of symbols, 1...Cover plate, 2...Back plate, 3...Synthetic resin body, 4...
Striker, 5...Latch, 6...Recess, 7...
Shaft, 8... Engagement groove, 9... Half door engagement step, 10
...Full door engagement step, 11...Ratchet, 1
2...Claw, 13...Shaft, 14...Entry groove, 14'
...Entry groove, 15...Side edge, 16a...Latch retaining part, 18...Edge, 19...Reinforcement bent part, 20
...Opening lever, 21...Locking lever, 22...Entry/exit side, 23...Bending joint, 24
...The side wall of the entry/exit side 22 of the striker 4 of the body 3.

Claims (1)

[Claims] 1. A cover plate 1 made of a metal plate provided on the front side, a back plate 2 made of a metal plate provided on the back side, and a body 3 made of synthetic resin provided between the cover plate 1 and the back plate 2. Striker 4 fixed to the vehicle body side,
a latch 5 that is pivotally supported within the body 3 and engages with the striker 4; an entry groove 14 for the striker 4 formed in the body 3; and an entry groove 14' for the striker 4 formed in the cover plate 1. In the automobile door lock device, a latch retaining portion 16a is formed in the entrance/exit portion of the entry groove 14' of the striker 4 of the cover plate 1 by bending a part of the cover plate 1 at right angles to the back side. The latch retaining portion 16a has a plate surface parallel to the advancing direction A of the striker 4, and the length c of the bent joint portion 23 at the boundary between the latch retaining portion 16a and the cover plate 1 is the same as the cover plate 1. A door lock device for an automobile, characterized in that the door lock device is formed to have a plate thickness larger than the plate thickness b of the door lock device.