JP3316709B2 - Automotive door lock anti-theft device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antitheft device for an automobile door lock having an antitheft function capable of preventing an unlocking operation due to an illegal act.

[0002]

2. Description of the Related Art Conventionally, as an antitheft device for an automobile door lock, a locking / unlocking operation is performed by moving a rack connected to a door locking / unlocking lever by a locking / unlocking motor and driving the motor. In this case, another antitheft motor is driven by a locking operation using a key or other means from outside the vehicle, and the locking claw is engaged with the rack, thereby restricting the unlocking operation of the unlocking / unlocking lever, thereby preventing unauthorized operation. There is one that prevents an unlocking operation by an act (for example, see Japanese Patent Application Laid-Open No. 55-65681). Also, as another example, the coupling lever is operated by the antitheft lever, the knob lever is disengaged from the coupling lever side connected to the locking / unlocking mechanism, and the knob operation is lost, and the operating force is released. Some are not transmitted to the lock mechanism.

[0003]

However, in the former device as described above, since the movement of the locking / unlocking lever is restricted, the unlocking operation is performed when a failure of the electric system such as a dead battery occurs. The latter device has a problem that the door cannot be opened, and the latter device has a problem that the structure of the door lock device is greatly changed depending on the presence or absence of the antitheft mechanism.

The present invention has been made in view of the above-mentioned problems of the prior art, and can prevent an unlocking operation by an illegal act without drastically changing a door lock device.
In addition, an object of the present invention is to provide a vehicle door lock antitheft device which can be unlocked even if an electric system failure occurs.

[0005]

In order to achieve the above object, an apparatus according to the present invention is connected to a case, a motor housed in the case and capable of rotating forward and backward, and an operation knob provided in a vehicle of a door, and is locked. A first operating lever that moves to a locking position and an unlocking position, a second operating lever that is connected to the locking and unlocking mechanism of the door lock device and moves to the locking position and the unlocking position, a first operating lever and a second operating lever, And a slide pin movable between a connecting position for connecting the first operating lever and the second operating lever and a burglarproof position for disengaging, and a cam groove formed by being rotated in a predetermined direction by the motor. A rotating body that moves the first operating lever and the second operating lever to the locking position and the unlocking position by contacting a protrusion provided on one of the first operating lever and the second operating lever; While being connected to the serial slide pin, engaged with the cam groove of the rotating body, by rotation of the rotation body, it is characterized in that a slider for moving the slide pin in the coupling position and antitheft position.

[0006]

When the rotating body is rotated by the motor, the slider is moved from the connection position to the antitheft position by the cam groove. Even when the slider is moved to the anti-theft position, the slide pin releases the connection between the first operating lever and the second operating lever, and the operating knob is forcibly unlocked by theft or the like, the operating force is reduced. The operating force is not transmitted to the door lock device by swinging. In the burglarproof state, the movement of the unlocking operation of the key cylinder is transmitted to the locking / unlocking mechanism of the door lock device, and the key cylinder can be unlocked.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIG. 8, (A) is an actuator that is connected to a door lock device (B) mounted on the driver's seat door of an automobile and locks and unlocks the door lock device (B) electrically. As shown in FIGS. 1 and 2, case (2)
Further, a motor (1) that can rotate forward and backward is accommodated in the cover (2b). (2c) is an arc-shaped restricting portion projecting from the cover (2b).

A worm (1a) is pivotally mounted in a case (2) by a shaft (5) and provided on a rotating shaft of a motor (1).
A worm wheel rotating body that can rotate forward and backward by meshing with the worm wheel. A protrusion (3a) and a cam groove (4) are formed on one side surface of the worm wheel. Is always energized. The cam groove (4) is defined by each guide wall (4c) protruding from the side, and
(5) An outlet part (4a) that is formed closer and is open
And an inlet part (4b) are formed.

[0009] (6) is a case (2) by a base shaft (6a).
A first operating lever pivotally mounted on the first operating lever, a longitudinal hole (6c) is formed in the longitudinal direction thereof, and a rotating body is provided at the operating end.
An engaging portion (6b) that can be brought into contact with the projection (3a) of (3) is formed, and the rotating body (3) rotates forward (clockwise in FIG. 1) or reversely rotates.
(Counterclockwise in FIG. 1), and the projection (3a)
By contacting (6b), the unlocking position shown in FIG.
The case can be moved to the locked position shown in FIG.
The shaft (6a) protruding from (2) has the first lock (B) on it.
A first output lever (7) connected to the locking / unlocking lever (B1) is fixed.

[0010] (8) is a second operating lever pivotally mounted coaxially with the first operating lever (6), and a shaft (8c) protruding from the base end is provided with a concave portion (8a) at the operating end. ) Is cut out,
On its right side, an engaging portion (8b) is formed which can abut on the right edge of the first operating lever (6), and moves to the unlocked position and the locked position similarly to the first operating lever (6). Can, case
A shaft (8c) projecting from (2) has a second output lever connected to a second locking / unlocking lever (B2) of the door lock device (B).
(9) is fixed. A spring for biasing the first operating lever (6) and the second operating lever (8) to a normal position where the first operating lever (6) and the second operating lever (8) overlap each other is provided between the first operating lever (6) and the second operating lever (8). (10) is provided.

A second locking / unlocking lever of the door lock device (B)
(B2) is connected to the locking / unlocking mechanism of the door lock device (B), and the first locking / unlocking lever (B1) is connected to an operation knob provided inside the door through a rod (B4). I have. The locking / unlocking mechanism is connected via a lever (B3) to a key cylinder (14) provided outside the door.

In the elongated hole (6c) of the first operating lever (6), a connecting portion (11b) detachable from the concave portion (8a) of the second operating lever (8).
The slide pin (11) provided with is slidably fitted.
This slide pin (11) is a pin (1
1a) and an elastically deformable tongue piece (11c) at the tip,
Engaging with the concave portion (8a) of the second operating lever (8), the connecting position connecting the first operating lever (6) and the second operating lever (8), and detaching from the concave portion (8a), The movement of the first operating lever (6) can be moved to a theft prevention position where the second operating lever (8) is swung relative to the second operating lever (8). The tongue piece (11c)
When the operating lever (6) is not in the locked position,
(2c) is abutted to prevent the slide pin (11) from being moved to the anti-theft position.

Reference numeral (12) denotes an L-shaped slider which is supported on the case (2) by pins (13) and (13) so as to be able to move up and down. The arm (12a) has an outer wall of the guide wall (4c). And a protrusion (12c) movably fitted in the cam groove (4), and a slide pin is inserted into a long hole (12b) formed in the arm (12a).
The pin (11a) of (11) is slidably fitted. The slider (12) rotates the pin (11) by the spring (17).
The pin (12c) is urged toward the center of (3) and rotates in a predetermined direction of the rotating body (3), so that the pin (12c) is moved from the guide wall (4c) through the inlet portion (4b) to the cam groove. (4) and moves up and down to move the slide pin (11) to the connection position and the antitheft position.

Next, the operation of the embodiment will be described. (Manual operation) As shown in FIG. 7, the first and second operating levers (6)
When (8) is in the unlocked position, the rotating body (3) is positioned in the neutral position by the urging force of the spring (2a) and the projection (3a)
Is located outside the movement locus of the engagement portion (6b), and the slider (12) is at the connection position, and the connection portion of the slide pin (11) is
(11b) is engaged with the concave portion (8a) of the second operating lever.
Via the first output lever (B1), the second operating lever (8) rotates counterclockwise integrally with the first operating lever (6) to move to the locking position shown in FIG. Door lock device (B)
Can be brought into the locked state. The unlocking mechanism of the door lock device (B) can be unlocked by manually unlocking the operation knob from the locked state shown in FIG. An actuator (A1) connected to a door lock device of another door is controlled by a control circuit (16) in accordance with detection of each position of a knob position detection switch (18) for detecting an operation knob of a driver's seat, Door lock devices of other doors are controlled to be locked and unlocked.

(Electric operation) In the unlocked state shown in FIG.
By rotating the key cylinder (14) from the neutral position to the locking range, the key operation detection switch (15) is closed to the lock side, and the motor (1) is reversely controlled by the control circuit (16). When the moving body (3) rotates counterclockwise from the neutral position, the protrusion (3a) comes into contact with the engaging portion (6b) of the first operating lever (6), and the first operating lever (6) and the 2 Move the operating lever (8) from the unlocked position to the locked position. Then the motor
When the power supply to (1) is stopped, the rotating body (3) returns to the neutral position by the urging force of the spring (2a) and turns into the locked state shown in FIG.

In the locked state shown in FIG. 6, when the key cylinder (14) is rotated to the unlocking range, the key operation detection switch (15) is closed to the unlock side, and the control circuit (16) turns on the key operation detection switch (15). When the motor (1) is controlled to rotate forward and the rotating body (3) rotates clockwise from the neutral position, the protrusion is formed.
(3a) comes into contact with the engaging portion (6b) of the operating lever (6) to move the first operating lever (6) and the second operating lever (8) from the locked position to the unlocked position. Thereafter, when the power supply to the motor (1) is stopped, the rotating body (3) returns to the neutral position by the urging force of the spring (2a) and turns to the unlocked state shown in FIG.

(Anti-theft operation and anti-theft unlocking operation) In the locked state shown in FIG. 6, when the remote operation or the locking operation of the key cylinder (14) is performed, the motor (1) is controlled to rotate in the reverse direction, and the rotating body is rotated.
(3) rotates counterclockwise. At this time, slide pin
Since the tongue piece (11c) of (11) is separated from the regulating part (2c),
As the rotating body (3) rotates, the pin (1) of the slider (12)
2c) enters the inlet portion (4b) from outside the guide wall (4c) by the urging force of the spring (17) and moves into the cam groove (4), and moves the slider (12) and the slide pin (11). It is moved to the antitheft position shown in FIG. After the power supply to the motor (1) is stopped, the rotating body (3) returns to the neutral position by the urging force of the spring (2a). In the stolen state, the connecting portion (11b) of the slide pin (11) is separated from the concave portion (8a) of the second operating lever (8), and the first operating lever (6) and the second operating lever ( 8) is disconnected.

In this anti-theft state, the operation knob is forcibly unlocked by theft or the like, and the first locking / unlocking lever is operated.
Even if (B1) is operated in the unlocking direction, as shown in FIG.
Since only the first operating lever (6) moves in the unlocking direction and no operating force is transmitted to the second operating lever (8), the locking and unlocking mechanism of the door lock device (A) is held in the locked state. , The door cannot be opened. In this state, when the operating force is released from the operating knob, the first operating lever (6) returns to the normal position by the urging force of the spring (10).

In the state shown in FIG. 3, the key cylinder (1
4) Unlocking operation, closing the key operation detection switch (15) to the unlock side, controlling the motor to rotate forward and rotating the rotating body (3) clockwise from the neutral position, Slider (12)
The pin (12c) escapes out of the cam groove (4) from the outlet (4a) and moves to the outside of the guide wall (4c), and the slider (12) and the slide pin (11) are connected from the antitheft position. Moved to a position. Further, in the theft state, even if the motor (1) cannot be driven due to a failure of the electric system or the like, the unlocking operation of the key cylinder (14) causes the lever (B3) of the door lock device (B) to move. Since the locking / unlocking mechanism can be brought into the unlocked state via the door, the door can be opened.

[0020]

As described above, according to the present invention, it is possible to prevent an unlocking operation due to an illegal act without largely changing the door lock device. Further, even if a failure occurs in the electric system, it can be brought into the unlocked state.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention with a case removed.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a front view of a main part in a burglarproof state.

FIG. 4 is a front view of a main part when an operation knob is operated in a burglary state.

FIG. 5 is a front view of a main part when a key cylinder is unlocked in a burglary state.

FIG. 6 is a front view of a main part in a locked state.

FIG. 7 is a front view of a main part in an unlocked state.

FIG. 8 is a perspective view of a door lock device to which the present invention is applied.

FIG. 9 is an exploded perspective view of a main part.

FIG. 10 is an example of a control circuit.

FIG. 11 is an operation explanatory view of a key cylinder.

[Explanation of symbols]

 (1) Motor (2) Case (3) Rotating body (4) Cam groove (6) First operating lever (8) Second operating lever (8a) Recess (11) Slide pin (11b) Connecting part (12) Slider

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shingo Goto 2 Takaracho, Kanagawa-ku, Yokohama-shi Nissan Motor Co., Ltd. (56) References JP-A-5-306586 (JP, A) JP-A-5-59858 (JP) , A) JP-A-64-33377 (JP, A) JP-A-63-93979 (JP, A) JP-A-6-346644 (JP, A) Japanese Utility Model Laid-Open No. 58-52264 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) E05B 65/12-65/42

Claims (4)

(57) [Claims] 1. A case, a motor housed in the case and capable of rotating forward and backward, a first operating lever connected to an operation knob provided in the door, and moved to a locking position and an unlocking position, and a door lock device. A second operating lever that is connected to the locking mechanism and moves to the locking position and the unlocking position, and is provided between the first operating lever and the second operating lever, and includes a first operating lever and a second operating lever. A slide pin movable to a connection position for connection and a burglar position for release, and a cam groove formed by being rotated in a predetermined direction by the motor, and provided on one of the first operation lever and the second operation lever. A rotating body for moving the first operating lever and the second operating lever to the locking position and the unlocking position by contacting the projection, and a cam groove of the rotating body coupled to the slide pin; And a slider for moving the slide pin to the connection position and the anti-theft position by rotation of the rotary body. 2. A slide pin provided with a tongue piece, and a case is provided in the case with a restricting section for abutting the tongue piece when the slide pin is at a position other than the locking position to prevent the slide pin from moving to the burglar position. 2. The anti-theft device for an automobile door lock according to claim 1, wherein: 3. The vehicle according to claim 1, wherein the second operating lever is provided with an engaging portion for interlocking the first operating lever in the direction from the locked position to the unlocked position. Door lock antitheft device. 4. The anti-theft device for an automobile door lock according to claim 1, wherein a spring is provided between the first and second operation levers to bias each other to a proper position.