JPH09235926A - Door locking device for car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a door from being shut instantaneously, and to miniaturize a motor. SOLUTION: A striker 12 is provided at a door, and a door lock main body 11 is provided at a car main body. A ratch 15 for engagement with the striker 12 is provided at the door lock main body 11. As the ratch 15, being engaged with the striker 12, turns at an angle of first turning, the ratch is put in the state of half-ratcheting. The ratch 15 is put in the state of full-ratcheting as it turns, starting from the state of half-ratcheting, at an angle of second turning. A cam lever 20, capable of turning, is provided at the door lock main body 11, and a cam follower 19 that follows the movement of cum surfaces 27, 28 as the cam lever 20 turns is provided at the ratch 15. A means 23 for urging the cam lever 20 to turn is provided at the door lock main body 11, and a driving means 32 that turns, together with the the means 23 for urging, the cam lever 20, making the ratch 15 put in the sate of full-ratcheting from the state of half-ratcheting or the state preceding further is provided at the door lock main body.

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 which can be simplified in construction.

[0002]

2. Description of the Related Art Conventionally, various door lock devices for automobiles have been proposed. For example, as disclosed in Japanese Patent Publication No. 4-52827, "door lock device for automobile", as shown in FIG.
Striker 10 on either the vehicle body side or the door side
0 (renumbered) is provided, and the door lock body 101 is provided on the other side. Door lock body 10
1, a latch 102 is provided. Striker 1
The latch 102 that can be engaged with 00 has a full latch position (completely closed position of the door) that completely engages with the striker 100,
The striker 100 is rotatable between an open position and an open position.

Further, the door lock body 101 is provided with a cam lever 103, and the cam lever 103 has a spring 10
It is urged to one side by 4. And the spring 104
The continuous cam surface 1 of the cam lever 103 by the urging force of the
05 and 106 are acting portions 10 provided on the latch 102.
7 and the acting portion 107 causes the cam surface 105,
By sliding 106, the latch 102 is rotated toward the full latch position.

The cam surface 105 is formed in an arc shape centering on the shaft 108. Further, since the cam surface 106 rotates the latch 102 in the full latch direction, the cam surface 106 is formed in a substantially linear shape displaced with respect to the shaft 108 so as to draw in the action portion 107. In this vehicle door lock device, the latch 102 is in the half latch position (half door state).
The shape of the cam surface 106 is set so as to be further rotated after passing. In addition, as shown in FIG.
In order to further rotate 02 from the half-latch position, the spring constant of the spring 104 is set so as to obtain the pull-in force E equivalent to the seal reaction force F of the seal material (not shown) such as a weather strip arranged on the door. Is set to.

Further, the "vehicle door lock device" of Japanese Utility Model Laid-Open No. 5-21066 discloses a latch 11 as shown in FIG.
A closer motor 111 is provided which detects that 0 is in a half-latch (half-lock) state and rotates it to a full-latch (full-lock) position. Further, the motor control means 112 for starting the rotation of the closer motor 111 after a certain time has elapsed after detecting the half lock position.
And, it operates while the closer motor 111 is rotating,
A door opening prohibiting means 113 for prohibiting a door opening operation is provided. 114 is a striker.

That is, this vehicle door lock device is
An auto-close function is provided to rotate the close motor 111 to rotate the latch 111 to the full latch position after a certain time has elapsed after detecting the half latch.

[0007]

However, in the vehicle door lock device shown in FIG. 7, since the pulling force E equivalent to the seal reaction force F is applied to the latch 102 by the spring 104, the door is relatively light. Although it can be closed by force, when the door is closed to some extent, the latch 102
However, there is a problem that the door is momentarily closed because a large retraction force E is instantaneously applied.

Further, as shown in FIG. 10, when the linear cam surface 106 rotates the operating portion 107, the operating portion 107
The maximum efficiency is obtained when the moving direction of the arrow mark and the perpendicular of the cam surface 106 are parallel to each other, but here the efficiency is deteriorated because the moving direction of the action portion 107 and the perpendicular line of the cam surface 106 intersect at an angle λ. Since the spring constant of the spring 104 has to be increased more than necessary, there is a problem that the spring 104 becomes even larger.

Further, as the latch 102 rotates to the full latch position, the dimension L between the rotation center 109 of the cam lever 103 and the center of the action portion 107 decreases, so that the spring 10
It is described that even if the length of 4 is gradually shortened and the biasing force is gradually reduced, a large latch rotation torque can be obtained in the action portion 107.
Since the dimension L does not become so small when is rotated,
In order to completely close the door, it is necessary to increase the spring constant of the spring 104.

Further, as shown in FIG. 8, the latch turning force cannot be obtained unless the pulling force E passes through the position P where the pulling force E coincides with the seal reaction force F. Therefore, for example, the passenger closes the door when getting on and off the vehicle. If the force is weak, there is a problem that the seal reaction force F acts and the acting portion 107 is not rotated to the position P, resulting in a half-latch (counter-door) state.

Further, in the vehicle door lock device shown in FIG. 9, the latch 110 is rotated by the close motor 111 as in the general auto-close function.
As shown in FIG. 8, in order to close the door, it is necessary to apply a turning torque equal to or larger than the seal reaction force F to the latch 110 by the closing motor 111 alone.
However, there is a problem in that the size is increased and the cost is increased.

Further, since it is necessary to secure a space for raising and lowering the window in the door panel, the door lock device must be arranged at a position avoiding this space. Therefore, conventionally, the driving force of the closing motor 111 is transmitted to the latch 110 by disconnecting the closing motor 111 from the main body of the door lock device and connecting it to the latch 110 with a connecting rod (not shown), so that the number of parts is increased. There was a problem that the cost would increase.

Therefore, an object of the present invention is to solve the above-mentioned problems, to prevent the door from being momentarily closed, and to securely close the door without being influenced by the closing force applied to the door. An object of the present invention is to provide an automobile door lock device capable of achieving further downsizing by reducing the size of the auto-close motor.

[0014]

The above object of the present invention is to provide a striker on either one of a vehicle body or a door and a door lock body on the other side, and engage the striker with the door lock body. A door latching device for a vehicle, in which a latch is provided, and when the latch engages with the striker and rotates by a first angle, a half-latch state is established, and when the latch rotates by a second angle, the striker is locked. The door lock body is provided with a rotatable cam lever, and a cam follower that follows the cam surface of the cam lever according to the rotation of the cam lever is provided in the latch, and the cam lever is moved until the latch is in a half-latch state. A biasing means for biasing to the latch side is provided in the door lock body, and the latch is a half latch. Can be achieved by the vehicle door lock device, wherein a driving means for rotating said cam lever status or even previously until fully latched state is provided in the door lock body.

In this vehicle door lock device, the cam lever is urged by the urging means to rotate, and the cam follower is pressed by the cam lever to bring the latch into a half-latched state. After that, the cam lever is rotated by the urging means and the driving means, and the latch is brought into the fully latched state. Therefore, the urging means only needs to rotate the latch to the half-latched state, so that the urging force of the urging means can be reduced. As a result, it is possible to prevent a momentary large retraction force from acting on the door and prevent the door from being momentarily closed.

Further, since the cam lever is rotated by the biasing means and the driving means from the half-latched state or before, the driving means can be miniaturized. In the above object of the present invention, when the latch is arranged in a half-latch state, a straight line connecting the rotation center of the latch and the center of the cam follower and a straight line perpendicular to the cam surface are 9
This can be achieved by an automobile door lock device characterized by forming a predetermined angle other than 0 degree.

In this vehicle door lock device, in the half-latch state, the cam lever is brought into contact with the cam surface of the cam follower at a predetermined angle to convert the rotational force of the cam lever into the rotational force of the latch. As a result, even if the latch stops in the half-latch state,
The driving means can rotate the latch to the fully latched state via the cam lever. Therefore, even if the force applied to the door when the occupant gets in and out is small, it is possible to prevent the door from becoming a half-door and to close the door securely.

Further, the above-mentioned object of the present invention is characterized in that, when the door opening handle of the door is operated during the operation of the drive means, the drive means is stopped and returned to the initial position. Can be achieved by a door lock device for. This vehicle door lock device can prevent the occupant from closing the foreign object while being pinched by operating the door opening handle.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a vehicle door lock device according to the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a vehicle door lock device according to the present invention, FIG. 2 is a view taken in the direction of an arrow A in FIG. 1, and FIG. 3 is a diagram illustrating an action (1/3) of the vehicle door lock device according to the present invention. , Fig. 4
Is the function of the vehicle door lock device according to the present invention (2 /
3), FIG. 5 is a view showing the relationship between the position of the latch and the seal reaction force and the retraction force of the vehicle door lock device according to the present invention, and FIG. 6 is the operation of the vehicle door lock device according to the present invention. It is a figure explaining (3/3).

As shown in FIG. 1, a vehicle door lock device (hereinafter referred to as a door lock device) 1 according to the present invention has a door lock body 11 attached to an automobile body (not shown) and a striker 12 attached to a door. Has been. Note that FIG. 1 shows the door in a fully opened state. Door lock body 11
Has a central shaft 14 rotatably attached to it through the base plate 13. A latch 15 arranged on one side surface of the base plate 13 and a body portion 16 arranged on the opposite side surface are attached to the central shaft 14. The latch 15 is provided with an engagement groove 17 that engages the striker 12 during rotation. A cam follower 19 is attached to the body 16 via a support rod 18.

A cam lever 20 is arranged above the body portion 16, and the cam lever 20 is rotatably attached to the base plate 13 by a central shaft 21. Cam lever 2
A pin 22 is installed at the tip of 0, and one hook 24 of a tension spring 23 is locked to this pin 22. The other hook 25 of the tension spring 23 is locked to the pin 26 of the base plate 13. The cam lever 20 is constantly urged toward the latch 15 by the tensile force of the tension spring 23.

A first cam surface 27 and a second cam surface 28 are continuously formed on the lower end surface of the cam lever 20. The latch 1 is attached to the first cam surface 27 and the second cam surface 28.
The cam follower 19 provided at 5 contacts. The first cam surface 27 and the second cam surface 28 will be described later. A sub base plate 30 is erected on the left end portion of the base plate 13 in the figure. The sub base plate 30 includes
As shown in FIG. 2, the motor unit 31 is attached. The motor unit 31 is a motor 3 that is a driving unit.
2 is provided, and the worm 34 is attached to the rotary shaft 33 of the motor 32.
Are fitted. A first gear 35 is meshed with the worm 34. A second gear 37 located on the opposite side of the pace plate 13 is attached to the central shaft 36 of the first gear 35. The motor unit 31 is provided with a controller (not shown) for the motor 32.

On the other hand, the support plate 38 is provided on the back surface of the surface of the base plate 13 on which the sub base plate 30 is erected.
Is erected. A central portion of a fan gear 39 is rotatably attached to the support plate 38 by a central shaft 40. The sector gear 39 is meshed with the second gear 36. A locking piece 41 is provided on the upper end surface of the fan gear 39, and the locking piece 41 is slidably locked to the pin 22 of the cam lever 20.

Now, the first cam surface 27 of the cam lever 20.
Is formed in an arc shape with a radius of curvature R as shown in FIG. 3, and the length of the arc is L1. In addition, the second cam surface 28
Is formed in a straight line having a length L2, and the extension line passes through the central axis 21 of the cam lever 20. At the fully open position of the door, the cam follower 19 of the latch 15 is arranged at the start end of the first cam surface 27, and the first cam surface 27
The center of the radius of curvature R of is coincident with the central axis 14 of the latch 15.

In this door lock device 1, when the door is fully opened, the striker 12 has the engagement groove 17 of the latch 15.
It is located away from. Then, as described above, the cam follower 19 of the latch 15 is arranged at the starting end of the first cam surface 27 of the cam lever 20. At this time, the center of the radius of curvature R of the first cam surface 27 coincides with the center axis 14 of the latch 15, so that the urging force of the tension spring 23 acting on the cam lever 20 causes the center axis 14 and the center of the cam follower 19 to move. It acts on the straight line that connects them. That is, only the biasing force that pushes the latch 15 toward the central axis 14 of the latch 15 acts on the cam follower 19, and the biasing force that rotates the latch 15 does not act on the cam follower 19. Therefore, the latch 15 is stopped at the fully open position.

When the door moves from the fully opened position toward the door closing direction, the striker 12 is inserted into the engaging groove 17 of the latch 15 as shown in FIG. After that, as the striker 12 moves, the side wall of the engagement hole 17 is pressed to the left side in the drawing, and the latch 15 and the cam follower 19 rotate clockwise. Then, the cam lever 20 in contact with the cam follower 19 is urged downward by the tension spring 23 and rotated counterclockwise.

Here, as shown in FIG. 5, when the door is closed, a seal reaction force F such as a weather strip acts on the latch 15. The seal reaction force F increases as the door approaches the fully closed position. Then, in order to fully close the door, a pulling force equal to or larger than the maximum seal reaction force F1 is required. On the other hand, the door starts closing and the latch 15
Even if the cam rotates, the cam follower 19 keeps the
While in contact with the cam surface 27, the door pull-in force E due to the urging force of the tension spring 23 is "0". Latch 15
When the cam follower 19 comes into contact with the second cam surface 28 as the rotation of No. 1 advances, the urging force of the tension spring 23 is converted into the force for rotating the latch 15 via the cam lever 20.
A pulling force E is generated at 5.

Then, as shown in FIG. 4, the cam lever 20
As the rotation proceeds, the angle δ formed by the straight line connecting the central axis 14 of the latch 15 and the cam follower 19 and the second cam surface 28 becomes smaller, and the pulling force E increases. However, since the biasing force of the tension spring 23 decreases as the rotation of the cam lever 20 progresses, the rate of increase of the pull-in force E decreases as the latch 15 approaches the fully closed position.

The spring constant of the tension spring 23 is set so that the pull-in force E becomes larger than the seal reaction force F when the latch 15 is arranged within the range H from immediately before the half-latch state to the predetermined position S. ing. In this range H, the latch 15 is biased by the tension spring 23 and rotated clockwise against the seal reaction force F of the packing. Then, when the latch 15 is arranged at the predetermined position S, the seal reaction force F and the pulling force E of the tension spring 23 match.

In this way, the seal reaction force F and the tension spring 23
After the pull-in force E of 1 is matched, the fan 23 is driven by the motor 23 to rotate the latch 15, so that the door can be fully closed. However, since the weather strip, the components of the door and the vehicle body, and the components of the door lock body 11 have variations in size and assembly position for each vehicle, in the present embodiment, considering these variations, the position S Motor 2 from the previous half-latch state
It is designed to rotate 3.

That is, while the door is closed from the fully open position to the half-latch position, the latch 15 is rotated by the tension spring 23, and from the half-latch state to the full-latch state, both the tension spring 23 and the motor 32 latch the latch 15. Is designed to be rotated. As shown in FIG. 4, when the latch 15 is arranged in the half-latch state, a straight line connecting the cam follower 19 and the central shaft 14 and a straight line perpendicular to the second cam surface 28 form a predetermined angle smaller than 90 degrees. Form θ. As a result, at the time of half-latch, the rotational force of the cam lever 20 is converted into the clockwise rotational force of the latch 15.

When the latch 15 is arranged in the half-latch state, this is detected by appropriate detecting means, and the motor 32 (FIG. 2) rotates. The rotational force of the motor 32 is transmitted to the sector gear 39 via the worm 34, the first gear 35, and the second gear 37, and the sector gear 39 rotates clockwise. When the sector gear 39 rotates clockwise, the locking piece 4 attached to the upper end surface of the sector gear 39 as shown in FIG.
The pin 22 of the cam lever 20 is pressed downward by 1 and the cam lever 20 rotates counterclockwise. And
The second cam surface 28 of the cam lever 20 allows the latch 15
The cam follower 19 of is pressed to the right side in the drawing, and the latch 15
Rotates clockwise.

When the latch 15 rotates from the half-latch state by the second angle β, the door is fully closed and the striker 12 cannot move any more. As a result, the latch 15 cannot rotate and the motor 32 stops.
In this door lock device 1, when the inner handle or the outer handle for opening the door is operated while the motor 32 is rotating and the door is being closed, the motor 32 stops and reverses to the initial position. , The door is returned to the half-latch position. As a result, it is possible to prevent the occupant's intention from forcibly closing the door while the foreign matter is sandwiched between the door and the vehicle body.

In the door lock device 1, as described above, the latch 15 is rotated by the tension spring 23 from the fully opened position of the door to the half latched state, and from the half latched state to the full latched state, the tension spring 23 and the motor 32. Causes the latch 15 to rotate. Therefore, the door lock device 1 can reduce the spring constant of the tension spring 23 as compared with the conventional case in which the tension spring alone rotates the latch from the fully open position to the full latch position. When the door is closed to some extent, a large spring force is momentarily applied to prevent the door from being momentarily closed.

Even if the force for closing the door when the occupant gets on and off is weaker than the seal reaction force F, the latch 15 is rotated from the half-latch state to the full-latch state by the motor 32, so that the door is in the half-latch state. That is, it is possible to prevent the vehicle from stopping in the state of the half door. Further, the door lock device 1 is configured to pull the latch 15 from the half latched state to the full latched state by the tension spring 23.
Since the motor 32 is rotated by both the motor 32 and the motor 32, the motor 32 can be downsized and the cost can be reduced as compared with the conventional case where the motor alone rotates the latch from the fully opened state to the fully latched state.

Since the motor 32 can be attached to the door lock body 11 by miniaturizing the motor 32 in this manner, the motor is arranged away from the door lock body 11 as in the conventional case, and the motor is connected by the connecting rod. The number of parts can be reduced and the cost can be reduced as compared with the case where the latch and the latch are connected. Although the door lock body 11 is attached to the vehicle body and the striker 12 is attached to the door in the above-described embodiment, this may be reversed.
Further, the motor unit 31 can be arranged outside the room or on any side inside the room as long as it does not hinder the raising and lowering of the window. Further, the present invention can be applied to various door locks other than the door lock device for automobiles.

[0037]

As described above, in the vehicle door lock device according to the first aspect of the present invention, the cam lever is rotated by the urging means, and the cam follower is pressed by the cam lever to bring the latch into a half-latch state. The cam lever is rotated by both the biasing means and the driving means to bring the latch into the fully latched state.

Therefore, since the urging means need only urging force to rotate the latch to the half-latch state, the urging means can be made small, thereby preventing the door from being momentarily closed. You can Further, since the biasing force of the biasing means is simultaneously acting when the driving force of the driving means is acting on the cam lever, the driving means can be downsized and the cost can be reduced.

Further, in the vehicle door lock device according to the present invention, when the latch is arranged in the half-latch state, the straight line connecting the center of rotation of the latch and the center of the cam follower is perpendicular to the cam surface. Since the straight line forms a predetermined angle other than 90 degrees, in the half-latch state, the rotational force of the cam lever can be converted into the rotational force of the latch. As a result, even if the force for closing the door is weak and the latch is stopped in the half-latch state, the latch can be rotated to the full-latch state and the door can be reliably closed by rotating the cam lever by the driving means.

In the vehicle door lock device of the present invention, when the handle for opening the door is operated while the drive means is operating, the drive means stops and returns to the initial position. It is possible to prevent the passenger from intentionally closing the door while it is sandwiched.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a vehicle door lock device according to the present invention.

FIG. 2 is a view taken in the direction of arrow A in FIG. 1;

FIG. 3 is a diagram illustrating an operation (1/3) of the vehicle door lock device according to the present invention.

FIG. 4 is a view for explaining the action (2/3) of the vehicle door lock device according to the present invention.

FIG. 5 is a diagram showing a relationship between a position of a latch and a seal reaction force and a drawing force of the vehicle door lock device according to the present invention.

FIG. 6 is a view for explaining the action (3/3) of the vehicle door lock device according to the present invention.

FIG. 7 is a diagram showing a conventional vehicle door lock device according to a first example.

FIG. 8 is a diagram showing a relationship between a position of a conventional latch and a seal reaction force and a drawing force.

FIG. 9 is a diagram showing a conventional vehicle door lock device according to a second example.

FIG. 10 is a view for explaining the operation of the conventional vehicle door lock device according to the first example.

[Explanation of symbols]

 1 Door Lock Device 11 Door Lock Main Body 12 Striker 14 Center Shaft 15 Latch 19 Cam Follower 20 Cam Lever 23 Tension Spring 27 First Cam Surface 28 Second Cam Surface 32 Motor

Claims (3)

[Claims] 1. A striker is provided on either one of a vehicle body and a door, and a door lock body is provided on the other side, and a latch that engages with the striker is provided on the door lock body, and the latch is the striker. A door lock device for a vehicle, which is in a half-latch state when engaged with and is rotated by a first angle α, and is in a full-latch state when the striker is locked when rotated by a second angle β from the half-latch state, A door lock body is provided with a rotatable cam lever, a cam follower that follows the cam surface of the cam lever as the cam lever rotates is provided in the latch, and a biasing means for biasing the cam lever in the rotation direction is provided. It is provided on the door lock body, and the latch is in the half-latch state or before. Until Ruratchi state, automotive door lock device, wherein a driving means for applying a rotational force to the cam lever together with the biasing means is provided on the door lock body. 2. When the latch rotates to the first angle α, a straight line connecting a rotation center of the latch and a center of the cam follower, a contact point of the cam surface, the cam follower, and a center of the cam follower are formed. 90 ° with the connecting straight line
The door lock device for an automobile according to claim 1, wherein the door lock device has a predetermined angle? 3. The vehicle door according to claim 1, wherein when the door opening handle of the door is operated while the driving means is in operation, the driving means stops and returns to the initial position. Locking device.