JPH09273341A - Door lock device for car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lock or unlock a door in a simple structure and prevent a car from being stolen. SOLUTION: This door lock device 61 for cars is provided with a door lock motor 33 equipped with a worm 35 at the rotary shaft, a wormwheel 37 rotatably engaged to the worm 35 of the door lock motor, a pair of projections 39 provided at a specified distance from each other in the peripheral direction at one side face of the wormwheel 37, and a lever 41 provided with a rotary shaft in the same direction with the rotary shaft 37a of the wormwheel 37 and a connection part 42 with a door lock regulator at one end and supported at the center and also provided with a pair of clearances 45 receiving respective projections 39 at the other end, transferring in accordance with the rotation of the wormwheel 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle door lock device having a door lock locking and unlocking function and an unlocking preventing function.

[0002]

2. Description of the Related Art Some vehicle door lock devices have an antitheft function for preventing an unlocking operation due to an illegal act such as theft. As an example of a vehicle door lock device of this type that implements an antitheft mechanism by using a cam groove, the one disclosed in Japanese Patent Laid-Open No. 5-306586 will be described with reference to FIGS. 6 to 8.

FIG. 6 is a front view showing a conventional automobile door lock device, FIG. 7 is a view taken along the line xx of FIG. 6, and FIG. It is the explanatory view shown. In the case 3 of the vehicle door lock device 1, a motor 5 capable of forward and reverse rotation is provided, and the motor 5 meshes a worm 7 provided on a rotating shaft with a worm wheel 9.
A protrusion 11 and a cam groove 13 are formed on one side surface of the worm wheel 9.

The worm wheel 9 is biased by a spring 15 provided between the worm wheel 9 and the case 3 as shown in FIG.
The neutral position shown in FIG. The cam groove 13 has an outlet portion 13a and an inlet portion 13b which are open to the outer circumference of the worm wheel 9.
And an arc-shaped idle vibration part 13c that connects them. The case 3 is provided with an actuating lever 19 via a shaft 17, and the shaft 17 is connected via an output lever (not shown) to a door locking / unlocking lever mounted on an automobile door.

Further, the operating lever 19 has the above-mentioned protrusion 1
1 is formed with an engaging portion 19a capable of abutting. Case 3
A block lever 23 is attached to the shaft lever 21 via a shaft 21.
It is biased counterclockwise. The block lever 23 is
The engaging pin 27 that engages with the cam groove 13 is provided.
It is movable by sliding 7 along the cam groove 13.

The operation of the vehicle door lock device 1 thus constructed will be described. In the unlocked state shown in FIG.
When the motor 5 is rotated by locking the operation switch (not shown), the worm wheel 9 rotates counterclockwise from the neutral position. Then, the protrusion 11 causes the operating lever 19 to move.
Then, the operating lever 19 is moved from the unlocked position to the locked position shown in FIG. 8A. After that, when the power supply to the motor 5 is stopped, the worm wheel 9 returns to the neutral position and rotates by the urging force of the spring 15.

When the motor 5 is rotated by anti-theft operation in the locked state shown in FIG. 8 (a), the worm wheel 9 rotates counterclockwise. Then, as shown in FIG. 8B, the engaging pin 27 of the block lever 23 enters from the inlet portion 13b of the cam groove 13 and moves to the idling portion 13c, and the block lever 23 moves to the anti-theft position. . Next, when the motor 5 is stopped, the worm wheel 9 is returned to the neutral position by the biasing force of the spring 15 and rotated, and the engagement pin 27 moves from the idling portion 13c to the outlet portion 13a.
The block lever 23 is held at the antitheft position shown in FIG.

As a result, the end of the block lever 23 enters the movement locus of the engaging portion 19a of the actuating lever 19, prevents the actuating lever 19 from moving in the releasing direction, and prevents the unlocking operation due to an illegal act. We were able to.

[0009]

However, in the above-mentioned conventional vehicle door lock device 1, since the block lever 23 is engaged with the cam groove 13 to operate, the block lever 23 is desired at a predetermined time. A complicated cam groove 13 to be operated to the position has to be formed in the worm wheel 9, which causes a problem of increased cost. In addition, since the block lever 23 that prevents the actuating lever 19 from moving in the releasing direction must be provided, the number of parts increases, which also complicates the structure and increases the cost. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle door lock device capable of locking / unlocking and anti-theft operations of a door lock with a simple structure.

[0010]

In order to achieve the above object, the structure of an automobile door lock device according to the present invention comprises a door lock motor having a worm attached to a rotary shaft and a worm of the door lock motor. And a rotatable worm wheel, a pair of projections provided on one side surface of the worm wheel at predetermined intervals in the circumferential direction, and a central portion supported by a rotary shaft in the same direction as the rotary shaft of the worm wheel. A lever having a connecting portion with a door lock regulator at one end and a pair of gaps at the other end for receiving the pair of protrusions that move by the rotation of the worm wheel, respectively. It is a thing. Further, the door lock device for an automobile is provided with a sliding contact on each of the lever and the worm wheel, and has a plurality of switch contacts for contacting the sliding contacts to detect the turning positions of the lever and the worm wheel. It may be arranged on the inner surface of a case that houses the lever and the worm wheel. Further, in the vehicle door lock device, one of the pair of protrusions is moved to a line segment that passes through the center of rotation of the worm wheel and is orthogonal to the axis of the lever, and the protrusion and the gap portion. The rotation of the lever may be prevented by engaging with either one of the above.

In the vehicle door lock device thus constructed, the worm wheel is provided with a pair of projections, and the projections are engaged with the gap provided at the other end of the lever to rotate the lever. A simple structure enables door lock / unlock operation. Also, by providing sliding contacts on each of the lever and worm wheel, and disposing a plurality of switch contacts that come in contact with these sliding contacts on the inner surface of the case, the turning positions of the lever and worm wheel can be reliably detected. Becomes Furthermore, by moving either one of the pair of protrusions on a line segment that passes through the center of rotation of the worm wheel and is orthogonal to the axis of the lever, and engage this protrusion and one of the gaps. The rotation of the lever can be blocked at the lock position and the unlock position.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a vehicle door lock device according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a front view showing an automobile door lock device according to the present invention, FIG. 2 is an exploded view of the automobile door lock device shown in FIG. 1, and FIG. 3 is a drive circuit in the automobile door lock device according to the present invention. It is a block diagram. A door lock motor 33 is fixedly provided in a case (not shown), and a worm 35 is provided on a rotary shaft of the door lock motor 33.

A worm wheel 37 rotatably provided on the case is meshed with the worm 35. On one side surface of the worm wheel 37, a pair of protrusions 39 are provided at predetermined intervals in the circumferential direction. The case has a rotating shaft 4 in the same direction as the rotating shaft 37a of the worm wheel 37.
A lock & unlock lever (lever) 41 rotatably supported by 1a is provided. The lever 41 is the rotary shaft 4
One end is a connecting portion 42 to the door lock regulator, and the other end is a fan-shaped engaging portion 43, sandwiching 1a.

The engaging portion 43 is formed by the worm wheel 37.
It is located in a state where it overlaps with one side. A pair of gaps 45 are formed in the engaging portion 43 in the arc direction, and the gaps 45 are partitioned by a partition wall 47 at the center. Further, the gap portion 45 is open on one side surface side and the arc side of the worm wheel 37. When the worm wheel 37 rotates, the above-mentioned protrusions 39 projecting from the worm wheel 37 enter into the pair of gaps 45, respectively. That is, the worm wheel 37 having the protrusion 39 in the gap 45 is further rotated to engage the protrusion 39 with the engaging portion 43, thereby enabling the lever 41 to rotate forward and backward.

As shown in FIG. 2, the worm wheel 37
Is provided with a sliding contact a, and a ground electrode (GND) and switches B, C, D, and E are formed on the inner surface of the case along the movement locus of the sliding contact a. Further, the lever 41 is provided with a sliding contact point B, and a ground electrode (GND) and a switch A are formed on the inner surface of the case along the movement locus of the sliding contact point B. Therefore, the respective sliding contacts a and b can detect the positions of the lever 41 and the worm wheel 37 by short-circuiting the switches A, B, C, D and E to the ground electrode (GND). .

These switches A to E are connected to the door lock control unit 51 shown in FIG. The door lock control unit 51, based on the detection signals from these switches A to E, detects the door lock motor 33.
Drive control the worm wheel 3 to the desired position (lock, unlock, super lock, key lock)
7, the rotation control of the lever 41.

Further, the door lock control unit 5
1, a door lock switch, a vehicle speed sensor, an impact sensor, an IG cylinder switch, a door courtesy switch, etc. are connected, and rotation control of the door lock motor 33 can be performed based on signals from these. Further, the door lock control unit 51 can control the rotation of the door lock motor 33 by remote control from the transmitter 55 via the keyless receiver 53.

The operation of the vehicle door lock device 61 thus constructed will be described with reference to FIG. FIG. 4 shows the relationship between the lever position and the rotation position of the worm wheel (a).
It is explanatory drawing shown by (e). In the locked state, the lever 41 swings to the left side in FIG. In this state, the sliding contact point B (see FIG. 2) is located off the switch A, and the control unit 51 detects the open state of the switch A to detect the locked state of the lever 41.

To unlock the lever 41,
A door lock motor 33 is driven by a dedicated switch (not shown) or a keyless entry switch to rotate the worm wheel 37 in the counterclockwise direction, and the protrusion 39 is engaged with the engaging portion 4.
By engaging with 3, the lever 41 is rotated from the position shown in FIG. 4 (b) to the position shown in FIG. 4 (c).

On the other hand, in order to perform the anti-theft operation (super lock) in the locked state, the worm wheel 37 is slightly moved counterclockwise from the locked state shown in FIG. 4 (a) by a dedicated switch or a keyless entry switch. To the super lock position shown in FIG. 4 (d).
At this time, one of the protrusions 39 has a line segment G that passes through the rotation center P of the worm wheel and is orthogonal to the axis L of the lever 41.
Place on top. The super-lock position of the protrusion 39 is detected by the sliding contact a of the worm wheel 37 closing the switch D.

In this super locked state, the lever 41
Since the force F for rotating the worm wheel passes through the rotation center P of the worm wheel 37, the worm wheel 37 does not rotate,
The rotation of the lever 41 is blocked. This prevents the lever 41 from rotating to release the locked state from the inside or the outside of the vehicle due to an illegal act.

Further, in the unlocked state shown in FIG. 4C, for example, when the key is inserted in the IG cylinder, the control unit 51 detects the state by the IG cylinder switch and the worm wheel 37. Is moved slightly clockwise and rotated to the key lock prevention position shown in FIG. 4 (e). At this time, one of the protrusions 39 is arranged on a line segment G that passes through the rotation center P of the worm wheel and is orthogonal to the axis L of the lever 41. As a result, similarly to the above-mentioned super lock state, the rotation of the lever 41 is blocked, and the door lock in the key inserted state,
That is, it is possible to prevent the key from being locked.

According to the vehicle door lock device 61 described above, the lock / unlock operation and the anti-theft operation of the door lock can be performed with a simple structure as compared with the conventional complicated structure using the cam groove, the block lever and the like. . Further, in the same configuration, by controlling the rotation of the worm wheel 37 by the detection signal of the IG cylinder switch, it is possible to prevent the lock of the key caused by the driver's mistake.

In the above example, the door lock motor 3
The worm wheel 37 is rotated by 3 and the lever 41
Although the vehicle door lock device 61 is rotated, the lever 41 may be manually rotated. For example, FIG.
When only the lever 41 is manually rotated from the locked state of FIG. 4A to the unlocked state of FIG. 4C, the worm wheel 37 is rotated clockwise to move the lever 41 again to the state of FIG. It is possible to shift to the locked state of a).

Next, the vehicle door lock device 6 described above.
Another function of No. 1 will be described. In a car equipped with a door lock device, if a collision accident occurs while the door is locked, even if the passenger tries to rescue the passenger, the door cannot be opened from the outside, which may make it impossible to rescue the passenger. . Therefore, it has been proposed that the door lock device is provided with a means for forcibly releasing the door lock so that the door can be opened from the outside when the vehicle is impacted in the door lock state.

In this type of door lock device disclosed in Japanese Patent Laid-Open No. 3-279573 shown in FIG. 5, when the door latch assembly 71 is in the door lock state, when the vehicle receives an impact due to a frontal collision, for example, the weight 73 The cam 75 is rotated clockwise by the inertial force, and the door lock lever 77 is rotated clockwise by the left end of the cam 75. As the door lock lever 77 rotates in this way, the door latch assembly 71 is unlocked and brought into an unlocked state. As a result, the door can be opened by operating the outer door outer handle, and the occupant inside the vehicle can be rescued.

However, in the conventional door lock device shown here, since the weight 73 is unlocked by the inertia of the weight 73, it cannot be completely held in the unlocked state, and when a slight impact is applied again, the door lock lever is released. There was a problem that 77 moved to the locked state again. Further, in this door lock device, in addition to the locking / unlocking control means at the normal time, a means for performing an unlocking operation at the time of impact (weight 73
Etc.) had to be provided separately.

On the other hand, in the vehicle door lock device 61 according to the present invention, when the vehicle receives an impact due to a collision, the lever 41 is in the locked state shown in FIG. 4 (a) by the detection signal from the impact sensor. Then, the worm wheel 37 is rotated counterclockwise to shift to the key lock prevention state (herein referred to as “emergency mode”) shown in FIG. 4E through the unlocked state shown in FIG. 4C. In this emergency mode, even if an external force in the rotation direction acts on the lever 41, the rotation of the lever 41 contacting the protrusion 39 is blocked, so that the emergency mode can be reliably continued. When the lever 41 is in the unlocked state shown in FIG. 4C, the worm wheel 37 is slightly rotated counterclockwise to directly shift to the emergency mode shown in FIG. 4E.

Thus, the vehicle door lock device 61
According to this, in addition to the above-described door lock locking / unlocking operation, anti-theft operation, and key lock prevention operation, a lock release function as an emergency mode can be easily added without providing special unlock release means for a collision. You can

[0030]

As described in detail above, according to the vehicle door lock device of the present invention, the worm wheel is provided with a pair of projections, and the projections are provided in the gap provided at the other end of the lever. Since the lever is rotated by engaging, the door locking / unlocking operation can be performed with a simple structure as compared with the conventional complicated structure using the cam groove, the block lever and the like. In addition, a sliding contact is provided on each of the lever and the worm wheel, and a plurality of switch contacts that contact the sliding contact and detect the turning position of the lever and the worm wheel are arranged on the inner surface of the case. It is possible to reliably control the lever and the worm wheel based on the signal. Furthermore, by moving either one of the pair of protrusions on a line segment that passes through the center of rotation of the worm wheel and is orthogonal to the axis of the lever, and engage this protrusion and one of the gaps. If the rotation of the lever can be prevented, the key can be prevented from being stolen and the key can be prevented from being locked by a driver's mistake, and a lock release function at the time of a collision can be easily added.

[Brief description of drawings]

FIG. 1 is a front view showing a vehicle door lock device according to the present invention.

FIG. 2 is an exploded view of the vehicle door lock device shown in FIG.

FIG. 3 is a block diagram illustrating a drive circuit in a vehicle door lock device according to the present invention.

FIG. 4 is an explanatory view showing the relationship between the lever position and the rotation position of the worm wheel, as shown in (a) to (e).

FIG. 5 is a front view showing a conventional vehicle door lock device having a door lock forced release means.

FIG. 6 is a front view showing a conventional vehicle door lock device.

FIG. 7 is a view taken along the line xx of FIG.

FIG. 8 is an explanatory view showing a process of reaching an antitheft state with (a), (b) and (c).

[Explanation of symbols]

 33 Door Lock Motor 35 Worm 37 Worm Wheel 37a Rotating Shaft 39 Protrusion 41 Lever 41a Rotating Shaft 45 Gap 61 Automotive Door Lock Device a, B Sliding Contact A, B, C, D, E Switch Contact

Claims (3)

[Claims] 1. A door lock motor having a worm attached to a rotating shaft, a worm wheel that is rotatable by meshing with the worm of the door lock motor, and provided on one side surface of the worm wheel at predetermined intervals in the circumferential direction. The pair of protrusions and the rotation shaft in the same direction as the rotation shaft of the worm wheel support the central portion, have a connecting portion with a door lock regulator at one end, and move by the rotation of the worm wheel. A door lock device for an automobile, comprising: a lever having a pair of gaps at the other ends for receiving a pair of protrusions, respectively. 2. A sliding contact is provided on each of the lever and the worm wheel, and a plurality of switch contacts for contacting the sliding contact to detect a rotational position of the lever and the worm wheel are provided on the lever and the worm wheel. The vehicle door lock device according to claim 1, wherein the door lock device is arranged on an inner surface of a case that accommodates the worm wheel. 3. One of the pair of protrusions is moved onto a line segment that passes through the center of rotation of the worm wheel and is orthogonal to the axis of the lever, and one of the protrusion and the gap is provided. The vehicle door lock device according to claim 1, wherein rotation of the lever can be prevented by engaging with and.