JP2868254B2 - Door lock device for automobile - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automobile door lock device.

(Prior Art) Conventionally, a door lock device for a vehicle includes a base plate fixed to a door, a fork for engaging a striker provided on a vehicle body, an open lever for releasing the engagement between the fork and the striker, and a lock position. A lock that can be moved to an unlock position and slides by operating an outer door handle or an inner door handle, and a lock that rotates by operating a key or an inner lock knob to move the link to a lock position and an unlock position. A plate provided with a plate or the like (for example, Japanese Utility Model Laid-Open No.
Reference).

Then, when the link is at the unlock position, if the outer door handle or the inner door handle is operated, the open lever is rotated via the link to open the door. When the link is in the lock position, the open lever does not rotate even if the handle is operated, and the door is not opened.

(Problems to be Solved by the Invention) However, in an automobile door lock device having the above-mentioned mechanism, even if the door is locked by key operation, a thin plate such as a ruler or a bar material is provided in a gap between the window glass and the door. The door lock state can be released by inserting and operating each rod or each plate.

If the door is locked without completely closing the window glass, the door can be unlocked by operating the inner lock knob with a wire or the like from outside the vehicle, and in any case, there is a sufficient risk of theft.

The present invention has been made in view of the above problems, and provides an automobile door lock device in which once a door is locked by a key operation, the door lock cannot be released by operating each rod, plate, or inner lock knob. The purpose is to do.

(Means for Solving the Problems) In order to achieve the above object, according to the present invention, an automobile door lock device is attached to a key cylinder 1 and rotated to an unlock position, a lock position and an overlock position by key operation. A key lever 2 having a rod guide groove 6 is provided, one end of which is engaged with the rod guide groove 6 and the other end is connected to the lock plate 27 of the lock device body 20 and moves to the unlock position and the lock position. A key rod 3 for rotating the lock plate 27 between an unlock position and a lock position. When the key lever 2 rotates between the unlock position and the lock position, the key rod 3 is unlocked in conjunction with the rotation. When the key lever 2 is moved between the lock position and the lock position and the key lever 2 is at the overlock position, the key rod 3 is prevented from moving and locked. The rod guide groove 6 is formed so as to be maintained at a position.

(Operation) Therefore, when the key lever 2 is turned to the overlock position by the key operation, the lock plate 27 of the lock device main body 20 cannot be turned. Therefore, the key rod 3,
The lock plate 27 does not rotate by the operation of the inner lock knob 8 (key rod 3) or the lock plate 27 itself, and the release of the door lock is prevented.

(Example) Next, an automobile door lock device according to the present invention will be described with reference to the accompanying drawings.

In FIG. 1, 1 is a key cylinder, 2 is a key lever, 3 is a key rod, 4 is an inner rod, and 20 is a lock device main body.

The key cylinder 1 is fixed to a door 10 and has a tongue piece having a long hole 5 in its cylinder outer 1a as shown in FIG.
1b extends downward.

The key lever 2 is a plate having a rod guide groove 6 and is rotatably attached to an end of a cylinder inner 7 of the key cylinder 1. The key is turned to an unlock position, a lock position, and an overlock position by a key operation.

The rod guide groove 6 is formed such that a sliding groove 6a between the points A and B always crosses the oblong hole 5 of the key cylinder 1 obliquely. The rotary groove 6b between the points B and C is formed on an arc centered on the cylinder inner 7. Further, an extremely small escape groove 6c is formed on a straight line connecting the point C and the cylinder inner 7.

One end of the key rod 3 is a long hole 5 of the key cylinder 1.
And the key lever 2 is engaged with an overlapping portion of the rod guide groove 6, and the other end is a locking device body described below.
It is connected to one end of 20 lock plates 27.

The inner rod 4 has one end to which an inner lock knob 8 is attached, and the other end connected to the other end of a lock plate 27 of the lock device main body 20 described below, and moves vertically by operating the inner lock knob 8. I do.

As shown in FIG. 2, the lock device main body 20 generally includes an open operation rod 21, an open operation lever 23, a lock plate 27, a link 29, an open lever 35, and a base plate 40 to which these are attached.

One end of the open operation rod 21 is formed in a plate shape and has a long hole.
22 is provided, and the other end is connected to the outer handle 9. The open operation rod 21 can be moved downward in the drawing by operating the outer handle 9.

The open operation lever 23 is attached to the base plate 40 by the support shaft 24.
And is urged clockwise by a coil spring 25 in the figure. A hole 26 is provided at one end thereof, and the other end thereof is connected to an inner handle (not shown).
Is turned in the counterclockwise direction in the figure against the urging force.

The lock plate 27 is attached to the base plate 40 so as to be rotatable about a support shaft 28. As described above, the lock plate 27 has one end connected to the key rod 3 and the other end connected to the inner rod 4.

The link 29 is also a plate-like member having a shoulder 30 at substantially the center, a hole 31 at one end, and a long hole 32 at the other end. In the hole 31 at one end of the link 29, a long hole 22 of the open operation rod 21 and a hole 26 of the open operation lever 23 are superimposed, and a shaft 33 is fitted thereto. The shaft 34 provided on the lock plate 27 is fitted.

The link 29 slides in the vertical direction in FIG. 2 in conjunction with the open operation rod 21 or the open operation lever 23, and rotates counterclockwise around the shaft 33 in FIG. 2 in conjunction with the lock plate 27. It is designed to rotate between a lock position in the direction and an unlock position in the clockwise direction.

The open lever 35 is attached to the base plate 40 so as to be rotatable about a support shaft 36, and at one end thereof, a protruding piece 37 is provided so as to protrude from the shoulder 30 of the link 29 at the unlocked position. A claw (not shown) that engages with a fork (not shown) protrudes from the rear surface of the base plate 40.
Then, when the projecting piece 37 of the open lever 35 is pushed by the shoulder 30 of the link 29 at the unlock position, the open lever 35 rotates counterclockwise in the figure, and the claw portion is moved from the fork. As a result, the engagement between the fork and the striker is released, and the door 10 is opened.

In the automobile door provided with the above components, when the lock device 20 is in the unlocked state, the key lever 2 is in the unlock position rotated clockwise as shown in FIG. As shown in FIG. 2, the key rod 3 is turned counterclockwise by the downward movement of the key rod 3 so that the link 29 is at the unlock position.

When the outer handle 9 is pulled from this unlocked state, the open operation rod 21 moves downward in the figure and pushes down the link 29 via the shaft 33. At this time, since the link 29 is guided by the shaft 34 along the elongated hole 32, the link 29 moves in the arrow S direction in the figure. Then, as a result of the shoulder 30 of the link 29 pushing the projecting piece 37 of the open lever 35, the open lever 35 rotates counterclockwise in the figure. As a result, the pawl (not shown) of the open lever 35 comes off the fork, and the door 10 is opened.

Also, when the inner door handle is pulled, the open operation lever 23 rotates counterclockwise in the drawing,
To depress the link 29 via the shaft 33, the door 10 is opened as before.

Next, a case where the door is locked by a key operation will be described.

First, as shown in FIG. 3, when the key lever 2 is turned to the lock position by operating the key of the key cylinder 1, the key rod 3 is pulled up by the lower edge of the sliding groove 6a provided in the key lever 2, and the key rod 3 is lifted. Slot 5 provided in cylinder 1
Is moved to the upper end, and is positioned to the point B.

On the other hand, in the lock device body 20, the lock plate 27 is rotated clockwise in FIG. 2 by the movement of the key rod 3, and the link 29 is moved in the direction of arrow T in FIG.
It will rotate around 33. Therefore, link 29
The shoulder 30 is separated from the protruding piece 37 of the open lever 35, so that even if the outer handle 9 or the inner handle is operated, the shoulder 30
Does not push the protruding piece 37, the door 10 maintains the locked state.

As described above, the key rod 3 is inserted into the rod guide groove 6.
When the inner lock knob 8 is raised, the lock plate 27 rotates counterclockwise in FIG. 2 via the inner rod 4. Therefore, the lock device main body 20 can be unlocked, and the door 10 can be opened by the outer handle 9 or the inner handle as described above. The key rod 3 is pulled down by the rotation of the lock plate 27, and the key lever 2 is lowered by sliding down the long hole 5 of the key cylinder 1 while sliding on the lower edge of the sliding groove 6a of the key lever 2. Return to the unlocked position shown in FIG.

Subsequently, as shown in FIG. 5, when the key cylinder 1 is further operated to rotate the key lever 2 to the overlock position, the key rod 3 is rotated by the rotation groove 6b of the rod guide groove 6.
Is moved to the position C. In this state, the escape groove 6c and the long hole 5 overlap, and the key rod 3 can move only within a small range of the escape groove 6c.

Therefore, even if the inner lock knob 8 is operated to raise the inner rod 4, or if a thin plate, wire, or the like is inserted between the window glass and the door 10, the key rod 3 or the lock plate 27 is operated, Since the link 29 rotates only slightly and does not reach the position where the link 29 is rotated to the unlock position, the door lock state is maintained. In other words, the key lever 2
Once the is turned to the overlock position, the door lock cannot be released except by key operation.

On the other hand, when the door is locked by operating the inner lock knob 8, when the inner lock knob 8 is depressed,
The inner rod 4 is lowered, and the lock plate 27 of the lock device main body 20 is rotated clockwise in FIG. 2 so that the above-described door lock state is established. At this time, the key rod 3
Rises to push the upper edge of the sliding groove 6a of the key lever 2 and rotate the key lever 2 to the lock position to be positioned at the point B and not at the point C. The door lock can be released by operating the lock knob 8.

(Effects of the Invention) As is clear from the above description, in the vehicle door lock device according to the present invention, if the key lever is rotated to the overlock position by the key operation, the lock plate of the lock device main body is rotated. Becomes impossible.

Therefore, even if a thin plate or the like is inserted between the door and the window glass to operate the rod and plate, or if the inner lock knob is operated by any means from the opened window glass, it can be externally operated without a key. Cannot open the door, preventing theft.

[Brief description of the drawings]

FIG. 1 is a front view of a door to which an automobile door lock device according to the present invention is applied, FIG. 2 is a front view showing an unlocked state of the lock device main body, FIG. 3, FIG. It is a figure showing an unlock position of a key lever, a lock position, and an overlock position. 1 ... key cylinder, 2 ... key lever, 3 ... key rod, 4 ... inner rod, 6 ... rod guide groove, 20
...... Lock device body, 27 ... Lock plate.

Claims (1)

(57) [Claims] A key lever having a rod guide groove, the key lever having a rod guide groove, one end of which engages with the rod guide groove; An end coupled to the lock plate of the lock device main body, and a key rod for moving the lock plate to the unlock position and the lock position by moving to the unlock position and the lock position, wherein the key lever is moved to the unlock position and the lock position. The key rod moves between the unlock position and the lock position in conjunction with the key rod, and when the key lever is in the overlock position, the key rod is prevented from moving and is maintained at the lock position. A door lock device for an automobile, wherein the lock guide groove is formed as described above.