JPH0874456A - Anti-theft mechanism in door locking device - Google Patents

Abstract

PURPOSE: To prevent anti-theft mechanism from being switched by mistake by providing a lock lever, an anti-theft member, a motor, a control part and a voltage switching circuit. CONSTITUTION: A motor 4 is provided to switch a lock lever into a lock position by normal rotation by the specified quantity, to switch an anti-theft member 29 into an anti-theft position by the continuation of normal rotation over the specified quantity, to reset the member 29 into a release position by reverse rotation by the specified quantity and to switch the lock lever into a release position by the continuation of reverse rotation over the specified quantity. A control part 46 is provided to perform lock control of switching the lock lever into the lock position by the motor 4, anti-theft control of switching the member 29 into the anti-theft position, and release control of switching the member 29 into the release position while keeping the lock lever in the lock position. Driving voltage at the time of the control part 46 performing lock- release is made lower than that at the time of anti-theft control by a voltage switching circuit 53, and excess rotation after the stop of current application is suppressed so as to prevent switching into an anti-theft state by mistake.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock device, and more particularly to an anti-theft mechanism for improving the crime prevention performance of the door lock device. here,
The anti-theft mechanism is synonymous with the super lock mechanism or the dead lock mechanism, and refers to a mechanism that prevents the lock state of the lock device from being released by operating the inside lock button (silknob) in the vehicle.

[0002]

2. Description of the Related Art A conventionally known door lock device is provided with a lock lever for switching between a locked state (locked state) and an unlocked state (unlocked state). When the lock lever is locked, as is well known, The door cannot be opened from outside the vehicle without the key (or remote control). However, even if the lock lever is locked, if the lock button inside the room is unlocked by breaking the window glass, the door will be opened without the key or remote controller. On the other hand, JP-A-2-
85488, JP-A-2-269281, JP-A-3-158583, USP 4,978,15.
No. 4, etc., proposes a lock device equipped with an anti-theft mechanism that can disable unlocking of a lock lever by an inner lock button. FIG. 11 shows a conceptual diagram of a general lock device with an anti-theft mechanism, where A is an output member rotated by a motor M, B is a lock lever for switching the lock device between a locked state and an unlocked state,
C is an anti-theft member that switches the anti-theft mechanism between an anti-theft state and its released state, and D is a spring attached to the anti-theft member C. The spring D includes a coil spring for urging the anti-theft member C toward the release position and an anti-theft member. 2 of the over center spring that holds member C at either the anti-theft position or the release position with the dead point as the boundary
There are types. In the illustrated device, when the output member A rotates counterclockwise to the unlock position X, the lock lever B is unlocked,
When the output member A turns right to the locked position Y, the lock lever B is locked. Further, the output member A is in the locking position Y.
When the lock lever B is rotated beyond the position to the anti-theft position Z, the lock lever B remains in the locked position and the anti-theft member C is switched to the anti-theft position. The U
The invention described in the specification of SP 4,978,154 also
The basic concept is the same as in FIG.

[0003]

In the locking device with the anti-theft mechanism as shown in FIG. 11, when only locking the lock lever B, the output member A is securely locked at the locking position Y.
Have to stop at. Therefore, conventionally, a sensor or the like is attached to the output member A, and when the output member A reaches the locking position Y, the sensor or the like detects this and the motor M
The power supply to is stopped. However,
Even if a sensor or the like is used, the power supply to the motor M can be surely stopped, but the rotation of the motor M cannot be surely stopped. That is, even if the power is turned off, the motor M rotates a little due to inertia, so that the output member A also rotates beyond the locking position Y. In the worst case, the elasticity of the spring D is overcome and the anti-theft member C is switched to the anti-theft position Z. It may happen. When the applicant conducted an experiment using a prototype (this prototype is a product having the structure described in the examples of the present application), it was not possible to completely prevent the above-mentioned erroneous switching. One of the causes of the erroneous switching is that the voltage of the battery that drives the motor M changes significantly. When the voltage increases, the excessive rotation also increases and erroneous switching occurs. It is conceivable that the circuit of the motor M, the speed reduction ratio, etc. are set in advance in accordance with a higher voltage in anticipation of such an abnormal increase in voltage.
When the battery voltage drops, the rotational force of the motor M may lose the elasticity of the spring D, and the anti-theft member C may not be switched. That is, if a lower voltage is assumed, switching to anti-theft cannot be performed, and if a higher voltage is assumed, erroneous switching to anti-theft occurs.

[0004]

Therefore, according to the present invention, the lock lever 1 which is connected to the key cylinder 14 of the door and the inner lock button 26 and is switched between the locked position and the unlocked position.
3, an anti-theft member 29 that switches between an anti-theft position that disables the unlocking operation of the lock lever 13 by the inner lock button 26 and a release position thereof, and the lock lever 13 that switches to the locked position when the lock lever 13 rotates forward by a predetermined amount. A motor 4 capable of switching the anti-theft member 29 to the anti-theft position when the forward rotation is continued beyond a predetermined amount,
A control unit 46 having a locking control for switching the lock lever 13 to the locking position by the motor 4 and an anti-theft control for switching the anti-theft member 29 to the anti-theft position by the motor 4, a battery 52, the battery 52 and the motor 4 And a voltage switching circuit 53 that is provided between the motor 4 and the motor 4 and can supply different drive voltages to the motor 4.
The voltage switching circuit 53 is an anti-theft mechanism in a door lock device configured so that the drive voltage when the control unit 46 performs the lock control is lower than the drive voltage when the anti-theft control is performed. Is. Further, according to the present invention, in the above, the voltage switching circuit 53 includes a high voltage circuit H that switches based on a command from the control unit 46 and a low voltage circuit L having a circuit resistance larger than that of the high voltage circuit H. This is an anti-theft mechanism in the door lock device.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 is a fan-shaped output member rotatably supported by a central shaft 2, and a motor 4 is provided in a gear portion 3 formed on the outer peripheral portion thereof.
The output gear (not shown) of is engaged. As shown in FIG. 2, a circular arc groove 5 centered on the central axis 2 is formed on the upper surface of the output member 1, and a neutral return spring 6 is housed in the circular arc groove 5. When the motor 4 is not rotating (non-energizing), the output member 1
When the motor 4 is held in the neutral position shown in FIG. 1 by the elastic force of the neutral return spring 6 and the motor 4 is energized and rotates normally, the elastic force of the neutral return spring 6 is passed from the neutral position of FIG. Then, when the motor 4 rotates in the reverse direction to the anti-theft point II which contacts the stopper 7, the motor 4 rotates counterclockwise from the neutral position to the unlock point IV which contacts the stopper 8 via the anti-theft release point III.

An interlocking shaft 9 is provided near the output member 1, and a different diameter portion 10 of the interlocking shaft 9 is engaged with a different diameter hole 12 of the interlocking lever 11. The interlocking shaft 9 is a lock lever 1 of the door lock device for switching between a locked position and an unlocked position.
3 (FIG. 2), the lock lever 13 and the interlocking lever 11 are configured to be displaced in conjunction with each other. Reference numeral 14 is a key cylinder of the door that switches the lock lever 13 between a locked position and an unlocked position.

On the surface side of the interlocking lever 11, a rectangular parallelepiped convex portion 15 and a rod-shaped projection 16 further protruding from the top of the convex portion 15 are formed. The projection 16 is the output member 1
The cam groove 17 formed on the back side of the. When the output member 1 rotates from the neutral position to the left and right, the interlocking lever 11 rotates around the interlocking shaft 9 because the projection 16 is pressed by the cam groove 17. This relationship will be described in more detail with reference to FIG. 1. The cam groove 17 basically has an arc-shaped inner peripheral wall 18 and an outer peripheral wall 19, which are arc-shaped around the central axis 2.
And a right cam wall 20 and a left cam wall 21, and at the intersection of the outer peripheral wall 19 and the right cam wall 20, there is provided an idle groove 22 extending on an arc locus centered on the central axis 2. . As described above, the interlocking lever 11 that interlocks with the lock lever 13 is in the position of FIG. 1 when the lock lever 13 is in the unlocked position, and the projection 16 of the interlocking lever 11 is the inner peripheral wall 18 as shown by the solid line. It is located at the first corner portion 23 formed between the right cam walls 20. In this state, when the output member 1 is rotated clockwise to the lock point I by the motor 4,
The right cam wall 20 engages with the protrusion 16 to rotate the interlocking lever 11 counterclockwise to displace the protrusion 16 to the locking position shown by the phantom line, whereby the lock lever 13 is also interlocked and switched to the locking position.

On the other hand, the projection 16 in the locking position shown by the phantom line in FIG. 1 is formed between the outer peripheral wall 19 and the left cam wall 21 when the output member 1 is in the neutral position. It is located far away from the two corners 24,
When the output member 1 is rotated counterclockwise to the release point III, the protrusion 16 is in contact with the second corner portion 24. Therefore, the interlocking lever 11 does not rotate even when the output member 1 turns counterclockwise from the neutral position to the release point III, and the left cam wall 21 presses the projection 16 and turns the interlocking lever only after turning leftward beyond the release point III. 1
When 1 is turned to the right and unlock point IV is reached, interlocking lever 11
Switches to the unlocked position. The reason why the second corner portion 24 at the neutral position and the protrusion 16 at the locking position are separated is as follows.
This is for canceling the anti-theft state described later. In addition, the output member 1 exceeds the lock point I and the anti-theft point II.
When it is turned to the right, the projection 16 enters the idle groove 22 as shown in FIG.

Reference numeral 25 is a hollow shaft connected to an inner lock button 26 of the door, and the hollow shaft 25 is rotatably attached to a small diameter shaft 27 on the upper end side of the interlocking shaft 9. A key portion 28 protruding in the radial direction is integrally formed with the hollow shaft 25, and a forked portion 30 formed on one end side of the anti-theft member 29 is slidably engaged with the key portion 28. On the other end of the anti-theft member 29, a hook 32 having a hook shape with an opening 31 formed on the side surface is provided, and the convex portion 15 of the interlocking lever 11 is exposed in the hook 32.

Although a specific method of sliding the anti-theft member 29 will be described later, when the anti-theft member 29 slides with respect to the key portion 28, the convex portion 15 is engaged with the hook 32 as shown in FIG. As shown in FIG. 5, the convex portion 15 separates from the hook 32 and switches to a state of facing the opening 31. In the state where the hook 32 and the convex portion 15 are engaged, when the hollow shaft 25 is rotated by operating the inner lock button 26, the anti-theft member 29 is rotated by the engagement of the key portion 28 and the bifurcated portion 30. The interlocking lever 11 rotates so that the lock lever 13 can be switched via the interlocking shaft 9. That is, hook 3
In the state in which 2 and the convex portion 15 are engaged, the inner lock button 26 and the lock lever 13 are in a connected state, and the lock lever 13 can be freely switched by operating the inner lock button 26. However, in the state where the convex portion 15 faces the opening 31 of the hook 32 as shown in FIG. 5, even if the anti-theft member 29 is rotated to the right, the hook 32 does not engage with the convex portion 15 and swings freely. It cannot be rotated. That is, when the inner lock button 26 is operated,
The lock lever 13 in the locked position cannot be displaced to the unlocked position. This idle vibration mechanism is the anti-theft mechanism of the present application, and the position of the anti-theft member 29 in FIG. 5 is the anti-theft position, or the position in FIG. 4 is its release position (non-anti-theft position).

On the back side of the interlocking lever 11, a switching body 33 which is rotatably supported by the central shaft 2 and switches the anti-theft state is provided. The switching body 33 is preferably formed of a thin metal plate, and one end of the overcenter spring 34 is locked at a desired position of the switching body 33, whereby the switching body 33 demarcates the dead center of the overcenter spring 34. 3 is configured to switch to either the non-actuated position of FIG. 3 or the actuated position of FIG.

A substantially triangular engagement hole 35 is formed in the switching body 33, and an engagement pin 36 formed in the anti-theft member 29 is engaged with the engagement hole 35. When the switching body 33 is in the non-actuated position of FIG. 3, the anti-theft member 29 slides to the right by the engagement of the engagement hole 35 and the engagement pin 36 and is held in the non-anti-theft position. Is displaced to the operating position beyond the dead center of the over-center spring 34, the anti-theft member 29 engages the engaging hole 3
5 and the engagement pin 36 slide to the left to be displaced to the anti-theft position in FIG.

A bending piece 37 capable of engaging with the side surface of the output member 1 is formed on the switching body 33, and the output member 1 is rotated rightward beyond the lock point I toward the anti-theft point II in the state of FIG. Then, the side surface of the output member 1 engages with the bending piece 37 to switch the switching body 33 from the non-actuated position to the actuated position against the elastic force of the overcenter spring 34, whereby the anti-theft member 29 is displaced to the anti-theft position. .

To briefly summarize the above contents, in the present application, when the output member 1 rotates to the lock point I, the interlocking lever 11 (lock lever 13) is locked by the engagement of the right cam wall 20 and the protrusion 16. When the output member 1 is displaced to the position and rotates beyond the lock point I to the anti-theft point II, the switching body 33 is displaced to the operating position to engage the engagement hole 35 and the engagement pin 3.
The engagement with 6 displaces the anti-theft member 29 to the anti-theft position.

Reference numeral 38 denotes a release lever that returns the switching body 33 from the operating position to the non-operating position by the power of the motor 4, and is rotatably supported by the shaft 39. A protrusion 40 is formed on the rotation end side of the release lever 38, and the protrusion 40 is used for the switching body 3.
By engaging with the long hole 41 formed in 3, the release lever 38 and the switching body 33 are linked so as to interlock with each other. Release lever 38
An engaging piece 43 that can be engaged with the drop-shaped convex portion 42 formed on the back surface side of the output member 1 is provided on the side portion of the. As shown in FIG. 6, the engagement piece 43 and the convex portion 42 are substantially in contact with each other when the switching body 33 is in the operating position and the output member 1 is held in the neutral position. When the member 1 is rotated counterclockwise to the release point III, the convex portion 42 engages with the engagement piece 43 to rotate the release lever 38 rightward about the shaft 39, whereby the switching body 33 is centered around the central shaft 2. To the non-operating position, the anti-theft member 29 switches from the anti-theft position to the release position. Even if the output member 1 rotates counterclockwise to the release point III, as described above, the cam groove 1
Since the left cam wall 21 of 7 does not engage with the projection 16 of the interlocking lever 11, the interlocking lever 11 remains in the locked position and is not unlocked, and the output member 1 goes beyond the release point III to the unlock point IV. When turning counterclockwise, the interlocking lever 11 moves to the left cam wall 21.
By the action of, it turns to the right and is displaced to the unlocked position.

The engagement between the convex portion 42 and the engaging piece 43 is
The output member 1 is released from the neutral position to the left until it reaches the release point III, but at this time, the switching body 33 is beyond the dead center of the over-center spring 34, so the elastic force of the over-center spring 34 ensures Switches to the inactive position.

Reference numeral 44 denotes another substantially triangular engaging hole formed in the switching body 33, and the engaging hole 44 has the interlocking lever 1 described above.
The engagement pin 45 formed in 1 is engaged. Engagement pin 45
When the interlocking lever 11 is turned to the right in the anti-theft state shown in FIG. 6, it engages with the engagement hole 44 and switches the switching body 33 from the operating position to the non-operating position. This is the key cylinder 1
When 4 is unlocked and the lock lever 13 (and the interlocking lever 11) is switched to the unlocked position, the switching body 33 is switched from the actuated position to the non-actuated position in conjunction with this, to the release position of the anti-theft member 29. It means that can be restored at the same time.

FIG. 9 shows a control block diagram of the present invention. 46 is a control unit, 47 is a lock sensor for detecting the position of the lock lever 13 (interlocking lever 11), 48 is a switching body 33 (anti-theft member 29). ) Is an anti-theft sensor that detects the position, 49 is a key switch that is switched by operating the key cylinder 14, and 50 is a receiver of the remote controller 51. The control unit 46 controls the output member 1 by the motor 4.
To the lock point I to switch the lock lever 13 to the lock position, and the output member 1 is controlled by the motor 4.
To the Anti-Theft Point II to rotate the Anti-Theft Member 2
Anti-theft control for switching 9 to the anti-theft position; release control for rotating the output member 1 to the release point III by the motor 4 to switch the anti-theft member 29 to the release position while keeping the lock lever 13 in the locked position;
The motor 4 rotates the output member 1 to the unlock IV to unlock the lock lever 13 to the unlocked position.

FIG. 10 is a circuit diagram showing a voltage switching circuit 53 which is the subject matter of the present invention. The voltage switching circuit 53 supplies at least two different power supply voltages to the motor 4. The voltage switching circuit 53 is the battery 52.
A high-voltage circuit H for directly supplying the voltage of 4 to the motor 4,
The battery 52 is connected to the motor 4 via a resistor 54 having an appropriate value.
It has a characteristic that it can be constructed at an extremely low cost, because it is composed of a low voltage circuit L connected to the above and a voltage changeover switch 55 which is switched by a command of the control section 46. In FIG. 10, reference numeral 56 is a rotation direction changeover switch of the motor 4, and 57 is a main switch. It should be noted that the voltage switching circuit 53 shown in FIG. 10 is merely an example, and although it is somewhat expensive, DC-
The voltage supplied to the motor 4 may be changed using a DC converter or the like.

[0020]

1 and 3 show the unlocked state, and when the key cylinder 14 or the remote controller 51 gives an operation command for locking to the control section 46 in this state, the control section 46 operates the rotation direction changeover switch 56. After the voltage changeover switch 55 is changed over to the low voltage circuit L side in the forward direction, the main switch 57 is turned on to rotate the motor 4 in the forward direction.
Then, the output member 1 turns right from the neutral position in FIG. 3, and the right cam wall 20 of the cam groove 17 formed on the back side of the output member 1 is rotated.
Presses the projection 16 of the interlocking lever 11 to press the interlocking lever 1
When 1 is rotated counterclockwise and the output member 1 rotates to the lock point I, the interlocking lever 11 is displaced to the locking position (FIG. 4). When the interlocking lever 11 is displaced to the locked position, the lock lever 1
Since 3 is connected to the interlocking lever 11 via the interlocking shaft 9, it is interlocked and displaced to the locking position, and at the same time, the convex portion 15
The anti-theft member 29 connected to the interlocking lever 11 by the engagement of the hook 32 with the hollow shaft 2 is connected via the key portion 28.
5 is rotated to displace the inner lock button 26 connected to the hollow shaft 25 to the locked position. When the lock sensor 47 detects the lock point I of the output member 1, the control unit 46 turns off the main switch 57 to stop the energization of the motor 4, whereby the output member 1 is acted upon by the elastic force of the neutral return spring 6. Return to neutral position.

In switching to the locked state, the motor 4 receives power from the low voltage circuit L having a high circuit resistance due to the resistor 54, so that the voltage applied to the motor 4 decreases and its rotational force is reduced. Somehow I can refrain,
The rotation due to inertia after the power is cut off is also small, and as a result, the malfunction of the output member 1 rotating to the anti-theft point as described in the prior art can be completely suppressed.

Therefore, when switching from the unlocked state to the anti-theft state, the key cylinder 14 or the remote controller 5 is used.
When the anti-theft operation command is given to the control unit 46 by 1, the control unit 46 switches the rotation direction changeover switch 56 to the forward rotation direction and the voltage changeover switch 55 to the high voltage circuit H side, and then turns on the main switch 57. Then, the motor 4 is rotated in the normal direction. Then, the output member 1 turns right from the neutral position, and when the output member 1 rotates to the lock point I as described above, the interlocking lever 11 (lock lever 13) is switched to the locked position, and then the output member 1 When is further rotated, the side surface of the output member 1 comes into contact with the bent piece 37 of the switching body 33, and the switching body 33 is displaced to the operating position side against the elasticity of the overcenter spring 34. Then, switching body 3
The anti-theft member 29 in which the engagement pin 36 engages with the engagement hole 35 of No. 3 slides from the position of FIG. 4 to the left side as shown in FIG. 5, and the convex portion 15 of the interlocking lever 11 disengages from the hook 32. To face the opening 31. In this state,
Even if the anti-theft member 29 is turned to the right by the unlocking operation of the inner lock button 26, the hook 32 does not engage with the convex portion 15 and does not swing, so the interlocking lever 11 does not rotate, and therefore the lock lever 13 is unlocked. You can't do it. When the anti-theft sensor 48 detects the operating position of the switching body 33, the control unit 46 stops energizing the motor 4, and the output member 1 is returned to the neutral position by the elasticity of the neutral return spring 6 ( (Figure 6).

In the switching to the anti-theft state, the motor 4 receives power from the low voltage circuit L through the high voltage circuit H having a smaller circuit resistance, so that the voltage applied to the motor 4 becomes higher and the rotational force thereof becomes higher. The lock control becomes larger than that in the lock control, and therefore, the switching failure of the switching body 33 is prevented from being lost due to the elasticity of the over center spring 34.

When the anti-theft state shown in FIG. 6 is released, the output member 1 is rotated counterclockwise by the motor 4. Then
Since the convex portion 42 of the output member 1 pushes the engaging piece 43 of the release lever 38, the release lever 38 rotates right about the shaft 39, and the engagement between the protrusion 40 and the long hole 41 causes the switching body 33 to rotate left. Then
When the output member 1 reaches the release point III in FIG. 7, the switching body 33 moves beyond the dead center of the over center spring 34 to the non-operating position side, and the anti-theft member 29 slides to the release position. Even when the output member 1 is rotated to the release point III as shown in FIG. 7, the left cam wall 21 of the cam groove 17 still has the interlocking lever 1
Since the protrusion 16 of No. 1 is not pressed, the interlocking lever 11 is not displaced in the locked position.

As described above, the output member 1 has the release point shown in FIG.
When it is turned to III, the switching body 33 returns to the non-actuated position side, and the anti-theft sensor 48 detects this. When only the anti-theft release command is received, the control unit 46 stops the energization of the motor 4 by this detection and returns the output member 1 to the neutral position by the elastic force of the neutral return spring 6. That is, only the anti-theft is released without unlocking the lock lever 13. However, when the unlocking command of the lock lever 13 is received, the control unit 46 continues to energize the motor 4 and unlocks the output member 1 even if the anti-theft sensor 48 detects the displacement of the switching body 33. Rotate to point IV. Then, the left cam wall 21 of the cam groove 17 presses the protrusion 16 of the interlocking lever 11, and the interlocking lever 11 can be rotated right and returned to the unlocked position.

[0026]

As described above, according to the present invention, the lock lever 13 connected to the key cylinder 14 of the door and the inner lock button 26 and switched between the locked position and the unlocked position, and the lock lever by the inner lock button 26. The anti-theft member 29 that switches between the anti-theft position that disables the unlocking operation of 13 and the release position thereof, and the lock lever 13 that switches to the locking position when the normal rotation by a predetermined amount switches to the anti-theft position when the normal rotation is continued beyond the predetermined amount. Member 29
To the anti-theft position, the locking control for switching the lock lever 13 to the locking position by the motor 4, and the anti-theft member 2 by the motor 4.
A control unit 46 having an anti-theft control for switching 9 to the anti-theft position; a battery 52; and a voltage switching circuit 53 provided between the battery 52 and the motor 4 and capable of supplying different drive voltages to the motor 4. The voltage switching circuit 53 is an anti-theft mechanism in a door lock device configured so that the drive voltage when the control unit 46 performs the lock control is lower than the drive voltage when the anti-theft control is performed. Since the drive voltage when the motor 4 is normally rotated by the control is set to a low value, it is possible to suppress the excessive rotation after stopping the energization.
It does not erroneously switch to the anti-theft state, and since the drive voltage during the anti-theft control is set to a high value, there will be no failure in switching to the anti-theft state due to insufficient rotational force of the motor 4. Further, according to the present invention, in the above, the voltage switching circuit 53 includes a high voltage circuit H that switches based on a command from the control unit 46 and a low voltage circuit L having a circuit resistance larger than that of the high voltage circuit H. Since it is the anti-theft mechanism in the door lock device, there is an effect that it can be implemented by a simple and inexpensive circuit in which only a resistor is added.

[Brief description of drawings]

FIG. 1 is a relationship diagram between an output member and an interlocking lever.

FIG. 2 is an exploded perspective view.

FIG. 3 is an unlocked state diagram.

FIG. 4 is a state diagram in which the output member is rotated to a lock point I.

FIG. 5 is a state diagram in which the output member is rotated to the anti-theft point II.

FIG. 6 is an anti-theft state diagram.

FIG. 7 is a state diagram in which the output member is rotated to a release point III.

FIG. 8 is a state diagram in which the output member is rotated to an unlock point IV.

FIG. 9 is a block circuit diagram.

FIG. 10 is a circuit diagram including a voltage switching circuit.

FIG. 11 is a known example diagram.

[Explanation of symbols]

1 ... Output member, 2 ... Central shaft, 3 ... Gear part, 4 ... Motor,
5 ... Arc groove, 6 ... Neutral return spring, 7, 8 ... Stopper,
9 ... Interlocking shaft, 10 ... Different diameter portion, 11 ... Interlocking lever, 12 ...
Different diameter holes, 13 ... Lock lever, 14 ... Key cylinder, 1
5 ... Convex part, 16 ... Protrusion, 17 ... Cam groove, 18 ... Inner peripheral wall, 19 ... Outer peripheral wall, 20 ... Right cam wall, 21 ... Left cam wall, 22 ... Empty vibration groove, 23 ... First corner part, 24 … Second
Corner, 25 ... Hollow shaft, 26 ... Inner lock button,
27 ... Small diameter shaft, 28 ... Key part, 29 ... Anti-theft member, 30 ... Bifurcated part, 31 ... Opening part, 32 ... Hook, 33
... switching body, 34 ... over center spring, 35 ... engaging hole, 36 ... engaging pin, 37 ... bending piece, 38 ... release lever, 39 ... shaft, 40 ... projection, 41 ... elongated hole, 42 ... convex portion,
43 ... Engaging piece, 44 ... Engaging hole, 45 ... Engaging pin, 46 ...
Control unit, 47 ... Lock sensor, 48 ... Anti-theft sensor, 49 ... Key switch, 50 ... Receiving unit, 51 ... Remote control, 52 ... Battery, 53 ... Voltage switching circuit, 54
... Resistance, 55 ... Voltage changeover switch, 56 ... Rotation direction changeover switch, 57 ... Main switch, H ... High voltage circuit, L
… Low voltage circuit.

Claims (2)

[Claims] 1. A lock lever 13 connected to a door key cylinder 14 and an inner lock button 26 to switch between a locked position and an unlocked position, and an unlocking operation of the lock lever 13 by the inner lock button 26. The anti-theft member 29 that switches between the anti-theft position and its release position, and the lock lever 13 when it rotates forward by a predetermined amount.
To the locking position, the motor 4 that can switch the anti-theft member 29 to the anti-theft position when the forward rotation is continued beyond the predetermined amount, and the locking control that switches the lock lever 13 to the locking position by the motor 4 and the motor 4. A control unit 46 having an anti-theft control for switching the anti-theft member 29 to an anti-theft position, a battery 52, and a voltage switching circuit provided between the battery 52 and the motor 4 and capable of supplying different drive voltages to the motor 4. 53. The anti-theft mechanism in the door lock device, wherein the voltage switching circuit 53 is configured to make the drive voltage when the control unit 46 performs the locking control lower than the drive voltage when the anti-theft control is performed. 2. The voltage switching circuit 5 according to claim 1.
Reference numeral 3 is an anti-theft mechanism in a door lock device having a high voltage circuit H which is switched based on a command from the control section 46 and a low voltage circuit L having a circuit resistance larger than that of the high voltage circuit H.