JP2551893B2 - 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 a door lock antitheft device for an automobile, which prevents electric lock operation and unlock operation by a motor drive and unlock operation due to fraud.

[0002]

2. Description of the Related Art Conventionally, as an anti-theft device for an automobile door lock, for example, there is one disclosed in Japanese Patent Laid-Open No. 55-65681. This device moves the rack connected to the locking / unlocking lever of the door lock by the forward / reverse rotatable locking / unlocking motor housed in the casing, and the motor can drive the locking / unlocking electric operation. Locking operation with the key or other means drives the anti-theft motor housed in the casing separately from the locking / unlocking motor to engage the lock claw with the rack so as to restrict the operation in the unlocking direction. By engaging the lock and unlock levers, the unlocking operation of the locking and unlocking levers is restrained to prevent the unlocking operation due to an illegal act.

[0003]

However, in the conventional device as described above, the motor for electrically locking and unlocking the door lock and the anti-theft device for restraining the unlocking operation of the locking and unlocking lever by fraudulent acts. Since two motors including the motor are required, there are problems that the number of constituent parts is increased, the structure is complicated, and the cost is increased.

In view of the above-mentioned problems of the prior art, the present invention makes it possible to prevent an electric operation of locking / unlocking a door lock and an unlocking operation of a door lock by a fraudulent act with a single motor. An object of the present invention is to provide an antitheft device for door locks for automobiles.

[0005]

In order to achieve the above object, the device of the present invention comprises a rotating body which can be rotated forward and backward from a neutral position by rotation of a motor and has a cam groove and a protrusion on one side surface, and a door. The lock position or unlock position is connected to the lock / unlock lever of the lock and has an engaging portion on the surface facing one side surface of the rotating body that can abut on the protrusion by forward or reverse rotation of the rotating body. A movable lever and an engaging pin whose base end is pivotally attached to the case and engages with the cam groove, and the engaging pin is guided to the cam groove by the rotation of the rotating body. , A block lever movable to a release position located outside the movement locus of the engaging portion of the actuating lever and a block position located within the movement locus of the engaging portion to prevent the actuation lever from moving to the unlocked position. It is characterized by having and.

[0006]

With the antitheft operation of the remote device such as the key plate from the outside of the vehicle, the motor rotates and the rotating body rotates, so that the engaging pin of the block lever is guided to the cam groove.
The block lever moves to the anti-theft position. Then, the rotating body returns to the neutral position, whereby the engagement pin is guided to the cam groove and the block lever is held at the theft prevention position.
In this state, the end of the block lever penetrates into the movement locus of the engaging part of the actuating lever and prevents the actuating lever from moving in the unlocking direction, preventing the unlocking operation due to fraudulent activity. To do.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. (1) is a motor housed in the case (2) and can rotate in the forward and reverse directions. (3) is a shaft (5) in the case (2).
A worm wheel (rotating body) that is pivotally attached by a worm wheel and forms a speed reducing mechanism that can rotate forward and backward by meshing with a worm (1a) provided on the rotation shaft of the motor (1). (3a) and cam groove (4) are formed, and the case
Due to the spring (2a) arranged between (2) and FIG.
It is biased to the neutral position shown in. The cam groove (4) opens on the outer peripheral surface of the worm wheel (3) and extends inward, and the outlet portion (4a) is clockwise with reference to the outlet portion (4a). Inlet part (4b) and outlet part (4a) that open to the outer peripheral surface of the worm wheel (3) at a slightly separated position
And a circular arc-shaped idle vibration part (4c) continuously extending from the inlet part (4b) about half a turn clockwise, and at the boundary part between the outlet part (4a) and the inlet part (4b). , A guide portion (4d) protruding substantially in the shape of an eyebrow is formed.

(6) is an operating lever whose base end is pivotally attached to the case (2) by a shaft (7). The operating end (6a) facing one side of the worm wheel (3) is Worm wheel
The protrusion (3a) of (3) is formed with an engaging portion (6b) capable of abutting, and the worm wheel (3) rotates normally (clockwise in FIG. 1) or reverses (counterclockwise in FIG. 1). The protrusion (3
By contacting the engaging part (6b) with (a), it can be moved to the unlocked position shown in FIG. 3 and the locked position shown in FIG. 5, and the shaft (7) protruding from the case (2) can be moved. An output lever (not shown) fixed to one end is connected to a locking / unlocking lever (not shown) of a door lock mounted on the door of the automobile.

As shown in FIG. 1, on the other side of the actuating lever (6), a process for controlling the energization of the motor (1) when the actuating lever (6) moves to a locked position or an unlocked position. An end switch (8) is arranged. (9) is a block lever whose base (9a) is pivotally attached to the case (2) by a shaft (10).
The spring (11) is urged in the counterclockwise direction in FIG. 3, and the working end is engaged with the cam groove (4) and can move along the cam groove (4). ) Is provided, and the engaging pin (9b) enters the guide portion (4d) at the released position and the cam groove (4) outlet portion (4a) as shown in FIG. Can move to anti-theft position.

When the block lever (9) is in the anti-theft position, the end portion (9c) is located within the movement locus of the engaging portion (6b) of the operating lever (6) and the operating lever (6) is locked. The movement from the position to the unlocked position is prevented, and when in the release position, the end portion (9c) is located outside the movement locus of the engaging portion (6b), and the movement of the operating lever (6) is prevented. You can do it freely. When the operating lever (6) is in the range between the unlocked position and a position slightly before the locked position, the side edge of the block lever (9) is
(9d) abuts the tip of the engaging part (6b), and the block lever
Block the rotation of (9) counterclockwise and block lever
Hold (9) in release position.

Next, the operation of the first embodiment will be described. (Manual operation) As shown in FIG. 3, when the door lock is in the unlocked state and the operating lever (6) is in the unlocked position, the engagement pin (9b) contacts the guide portion (4d). , Block lever (9)
Is held in the released position, the worm wheel (3) is in the neutral position, and the protrusion (3a) is located outside the movement track of the engaging part (6b). When the unlocking operation is performed, the operating lever (6) can be rotated counterclockwise through the output lever to move to the locking position shown in FIG. When the door lock is manually unlocked from the locked state, the actuating lever (6) rotates clockwise through the output lever to move the motor (1) to the unlocked position shown in FIG. You can move freely without reversing.

(Electric operation) In the unlocked state shown in FIG.
When the operation switch (not shown) is locked, the motor (1) rotates and the worm wheel (3) rotates counterclockwise from the neutral position. From this state, when the worm wheel (3) further rotates counterclockwise, as shown in FIG. 4, the protrusion (3a) abuts the engaging portion (6b) of the operating lever (6), and the operating lever When (6) is moved from the unlocked position to the locked position and then the motor (1) is de-energized, the worm wheel (3) returns to the neutral position by the urging force of the spring (2a). Then, the locked state shown in FIG. 5 is obtained.

In the locked state shown in FIG. 5, when the operation switch (not shown) is unlocked, the worm wheel (3) is rotated clockwise from the neutral position by the rotation of the motor (1), whereby the protrusion is formed. (3a) is the engaging part of the operating lever (6)
After contacting (6b) and moving the operating lever (6) from the locked position to the unlocked position as shown in FIG. 9, when the power supply to the motor (1) is stopped, the worm wheel (3) is , Is returned to the neutral position by the biasing force of the spring (2a) and pivoted to the unlocked state shown in FIG.

(Anti-theft operation and anti-theft unlocking operation) In the locked state shown in FIG. 5, when the anti-theft operation is performed from outside the vehicle by a remote device such as a key plate, the motor (1) rotates and the worm wheel (3) turns counterclockwise. By rotating in the direction shown in FIG.
As shown in Fig. 6, the engaging pin (9b) of the block lever (9) enters from the inlet portion (4b) of the cam groove (4) and moves to the idling portion (4c), and the block lever (9) is Move to the antitheft position shown in 7. Then, after the energization of the motor (1) is stopped, the worm wheel (3) is returned to the neutral position by the urging force of the spring (2a), so that the engagement pin (9b) is released from the idling portion (4c).
The block lever (9) is held in the anti-theft position shown in FIG. In this state,
The end portion (9c) of the block lever (9) penetrates into the movement locus of the engaging portion (6b) of the operating lever (6), and the operating lever (6)
The lock is prevented from moving in the unlocking direction, and the unlocking operation by fraudulent acts is prevented.

In the anti-theft state shown in FIG. 8, when the anti-theft operation switch is unlocked, the worm wheel (3) rotates clockwise from the neutral position and the engagement pin (9b) moves into the cam groove.
Move from the outlet (4a) of (4) to the outer peripheral wall, move the block lever (6) to the release position, and move the end (9c) of the block lever (9) to the movement locus of the engaging part (6b). The protrusion (3a) comes into contact with the engaging portion (6b) in the state of being moved to the outside, and the operating lever
(6) is moved from the locked position to the unlocked position.

10 to 13 show a second embodiment of the present invention. The same members as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. In this embodiment, the outlet (4a) of the cam groove (4) is allowed to move in a direction of escaping from the outlet (4a) to the outer peripheral wall, and conversely enters the outlet (4a) from the outer peripheral wall. By forming the blocking portion (4e) including the elastic tongue that blocks the movement in the direction, when the door lock is in the locked state, for example, the locking / unlocking operation knob arranged inside the door of the vehicle is used by the occupant. It prevents the malfunction that occurs when the knob is immediately returned to the locked position by the elbow even if it is pressed by the elbow or the like, even though it is unlocked electrically. .

More specifically, as shown in FIG. 13, the outlet portion (4a) of the cam groove (4) is inclined downward in the direction of escape from the outlet portion (4a) to the outer peripheral wall, and is elastic downward. A deformable tongue-shaped blocking portion (4e) is formed. The blocking portion (4e) is arranged such that when the engaging pin (9b) moves in the direction of coming out of the outlet portion (4a), the engaging pin (9b) is blocked by the blocking portion (4e).
Riding on the upper part elastically deforms downward to enable the movement of the engagement pin (9b), but on the contrary, the engagement pin (9b) will move in the direction of entering the outlet portion (4a) from the outer peripheral wall. In this case, the engagement pin (9b) engages with the tip to prevent its movement in the approach direction. Next, the operation will be described.

(Anti-theft unlocking operation) When the anti-theft operation switch is unlocked in the anti-theft state in which the block lever (9) is located at the block position, the worm wheel (3) is rotated from the neutral position to be engaged. Pin (9b) is blocking part (4e)
Rides on, and escapes from the outlet (4a) of the cam groove (4) and moves to the outer peripheral wall. At that time, the blocking part (4e) is engaged with the engaging pin.
(9b) is elastically deformed downward so as to allow the movement in the escape direction. As the engaging pin (9b) moves from the outlet portion (4a) of the cam groove (4) to the outer peripheral wall, the block lever (9) moves to the release position. Further, as the worm wheel (3) rotates, the protrusion (9c) of the block lever (9) is moved outside the movement locus of the engaging portion (6b).
(3a) abuts the engaging portion (6b) to move the operating lever (6) from the locked position to the unlocked position. After that, the worm wheel (3) returns to the neutral position.

(Electrical unlocking operation) In the locked state shown in FIG. 10, the unlocking operation of the operation switch (not shown) causes the motor (1) to rotate and the worm wheel (3) to rotate clockwise from the neutral position. The lever (3a) turns to the operating lever.
It abuts the engaging portion (6b) of (6) and moves the operating lever (6) from the locked position to the unlocked position as shown in FIG.

At this time, for example, when the elbow or the like is placed on the knob and the knob is immediately returned from the unlocked position to the locked position, the worm wheel (3) is actuated during the operation of returning to the neutral position. The lever (6) first moves from the unlocked position to the locked position. Therefore, as the worm wheel (3) returns to the neutral position, as shown in FIG.
When the outlet (4a) of (4) reaches the position of the engaging pin (9b),
The engaging portion (6b) of the actuating lever (6) deviates from the movement locus of the block lever (9), and the block lever (9) moves toward the spring (1
Since it is biased in the counterclockwise direction by 1), the engagement pin (9b) is moved by the rotation of the worm wheel (3).
Attempt to move the block lever (9) to the block position by going into (a), but the engagement pin (9b) comes into contact with the blocking portion (4e) and the exit portion (9b) of the engagement pin (9b). Since the movement toward 4a) is blocked, the engagement pin (9b) does not enter the outlet portion (4a). Therefore, the engagement pin (9b) rides on the guide portion (4d) without moving to the outlet portion (4a), and the block lever (9) is held in the released position, so that malfunction occurs. There is no.

[0021]

According to the present invention, by one motor,
The door lock can be unlocked and operated electrically, and the door lock can be prevented from being unlocked by a fraudulent act, so that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of an anti-theft device with a cover of a case according to a first embodiment of the present invention removed.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a schematic operation explanatory view showing an unlocked state.

FIG. 4 is a schematic operation explanatory view showing a state during a locking operation.

FIG. 5 is a schematic operation explanatory view showing a locked state.

FIG. 6 is a schematic operation explanatory view showing a state during the antitheft operation.

FIG. 7 is a schematic operation explanatory view during the antitheft operation in a state different from that in FIG.

FIG. 8 is a schematic operation explanatory view showing a burglarproof state;

FIG. 9 is a schematic explanatory view of the operation during the anti-theft unlocking operation.

FIG. 10 is a schematic operational explanatory view showing a locked state of the second embodiment of the present invention.

FIG. 11 is a schematic operation explanatory view showing a state during an unlocking operation.

FIG. 12 is a schematic operation explanatory view showing an erroneous operation state during an unlocking operation.

13 is a sectional view taken along line BB in FIG. 12;

[Explanation of symbols]

 (1) Motor (2) Case (3) Worm Wheel (Rotating Body) (3a) Projection (4) Cam Groove (4a) Outlet (4b) Inlet (4c) Idler (4d) Guide (4e) ) Blocking part (6) Actuating lever (6b) Engaging part (9) Block lever (9b) Engaging pin (9c) End part (9d) Side edge (11) Spring (12) Lever (12a) Projecting part

Claims (3)

(57) [Claims] 1. A rotating body that can be rotated forward and backward from a neutral position by rotation of a motor and has a cam groove and a protrusion on one side surface, and is connected to a locking / unlocking lever of a door lock,
An actuating lever that has an engaging portion that can abut on the protrusion when the rotating body rotates in the forward or reverse direction and that can move to the locking position or the unlocking position, and the base end portion. Has an engaging pin that is pivotally attached to the case and that engages with the cam groove, and the engaging pin is guided to the cam groove by the rotation of the rotating body. For a vehicle characterized by having a block lever movable to a release position located at the lock position and a block position located in the movement locus of the engaging portion and preventing the operation lever from moving to the unlock position. Door lock anti-theft device. 2. The cam groove guides the locking pin by rotating the rotating body from the neutral position to one side, and moves the block lever toward the block position. The vehicle door lock according to claim 1, further comprising: an outlet portion that guides the locking pin in a direction of escaping out of the cam groove by rotating toward the outside and moves the block lever to a release position. Anti-theft device. 3. An outlet portion is provided with a blocking portion that enables movement of the engagement pin in the direction of escape from the outlet portion and prevents movement of the engagement pin from the outside of the cam groove in the direction of entry toward the outlet portion. The antitheft device for a vehicle door lock according to claim 2, wherein