JPH0384181A - Door lock driver - Google Patents

Abstract

PURPOSE:To enhance the operability of a door lock driver by a method in which when an operating lever is on locking position, a coupling gear to be operated through a worm gear having automatic clamping function serves to restrict the operating lever by a coupling motor. CONSTITUTION:When supplying electric current to a locking and unlocking motor and a coupling motor 10, a main gear 5 and a coupling gear 12 turn oppositely(counterclockwise), and the main gear 5 is then turned counterclockwise while pressing a spring 6 to enable an operating lever 7, an output shaft 8, and an output lever 9 to reach locking position through a projection 7a to couple with a long hole 5a. When the supply of electric current to the motors 1 and 10 is stopped, the main gear 5 restores to neutral state. The coupling projection 7a of the lever 7 is further restricted by one end of the long hole 12a of the gear 12, the gear 12 is locked to coupling position by a worm 11 having a reverse turn preventing function, and unlocking by manual operation can be prevented.

Description

[Detailed description of the invention] "Industrial application field" The present invention locks a door lock body for an automobile.

The present invention relates to a door lock drive device for unlocking, and more particularly to a door lock drive device equipped with a locking mechanism that mechanically prevents unlocking by manual operation during locking.

"Prior art" As a conventional door lock drive device, Japanese Patent Application Laid-Open No. 58-176
The device disclosed in No. 374 will be described with reference to the drawings. FIG. 4 is a longitudinal cross-sectional view showing a conventional door and lock driving device together with a door lock main body.

In the locking/unlocking mechanism, a pinion 2 is fixed to the shaft of a locking/unlocking motor 1, and an intermediate pinion is coaxially engaged with an intermediate gear 3 that engages with the pinion 2 and has a predetermined play angle with the intermediate gear 3. 4 is assembled. The intermediate gear 3 and intermediate pinion 4 constitute a clutch. A bushing rod 27 having a rack 27a that meshes with the intermediate pinion 4
The tip of the door lock body 16 is connected to the door lock body 16.

In the locking mechanism, an eccentric plate 3 is attached to the shaft of the locking motor 10.
1 is fixed, and a pawl member 32 that engages with the eccentric plate 31 is rotatably assembled to the shaft 34. Pawl member 3
2 is provided with a corresponding hook 33 which in the locked state engages with a hook formed at the end of the bushing rod 27.

The operation of the above configuration will be explained. First of all, No. 515!1 (a
) indicates the unlocked state. From this state, when the lock/unlock motor 1 shown in FIG.
, and is transmitted to the intermediate pinion 4. intermediate pinion 4
rotates clockwise, and the bushing rod 27 moves downward to enter the locked state shown in FIG. 5(b).

The unlocking operation from the locked state is performed by changing the direction of energization to the locking/unlocking motor 1 to the opposite direction.

To change from the locked state to the locked state shown in FIG. 5(b),
The locking motor 10 shown in FIG. 4 is energized so as to rotate in the locking mechanism operating direction. The output of the locking motor 10 is transmitted to the pawl member 32 via the eccentric plate 31. Pawl member 3
2 rotates clockwise, and the corresponding hook 33 engages with the hook 27b of the bushing rod 27, resulting in the locked state shown in FIG. 5(C). Manual unlocking operation of the bushing rod 27 is then prevented.

The unlocking operation from the locked state shown in FIG. 5(c) is performed so that the locking/unlocking motor 1 rotates in the unlocking direction, and the locking motor 10 rotates in the releasing direction of the locking mechanism. This is done by energizing both at the same time.

At this time, the locking/unlocking motor 1 moves the intermediate gear 3°, the intermediate pinion 4. The bushing rod 27 is driven, and the pawl member 32 is driven by the locking motor 10. Since a predetermined play angle is provided between the intermediate gear 3 and the intermediate pinion 4, the lock/unlock motor 1 and the locking motor 1
0 starts rotating at the same time, the intermediate pinion 4 and bushing rod 27 operate later than the pawl member 32.

Therefore, first, the pawl member 32 rotates counterclockwise, and then the bushing rod 27 moves upward, resulting in the unlocked state shown in FIG. 5(a).

``Problems to be Solved by the Invention'' In the conventional door lock drive device equipped with the locking mechanism as described above, when changing from the unlocked state to the locked state, the pawl member 32 moves the bushing rod 27 in the locking direction. It was necessary to activate the locking mechanism after the locking was completed so as not to block the locking. On the other hand, when changing from the locked state to the unlocked state, it is necessary to release the locking mechanism so that the pushbutton 27 does not obstruct the movement of the pawl member 32, and then perform the unlocking operation.

For this reason, in the conventional door lock driving device described above, when changing from the unlocked state to the locked state, the switch operation is performed in two steps, such as operating the locking operation switch and then scratching the locking mechanism operation switch. In addition, when changing from the locked state to the unlocked state, the intermediate gear 3 and intermediate pinion 4 are made into separate parts, and by providing an angle of play between them and operating them as a clutch, the locking/unlocking mechanism can be changed from the locked state to the unlocked state. This was dealt with by providing a time lag between the activation and the activation of the locking mechanism.

As mentioned above, conventional door lock drive devices have poor operability because the switch is moved in two stages when the locking mechanism is activated, and the number of parts increases due to the provision of a clutch, which increases costs. There were problems such as things to do.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a door lock drive device with good operability and a small number of parts.

``Means for Solving the Problems J'' The door lock driving device according to the present invention for solving the above problems includes a locking/unlocking mechanism that drives the door lock body, and a mechanical mechanism for manually unlocking the door when the door is locked. In the door lock driving device, the locking/unlocking mechanism is driven by a locking/unlocking motor via a main gear to rotate between a locked position and an unlocked position. The locking mechanism is provided with an actuation lever provided with an engagement protrusion extending parallel to the axis of rotation, and the locking mechanism is driven by a locking motor via a worm gear having an automatic tightening function to switch between a locking position and a release position. a locking gear that moves coaxially with the operating lever and has a play angle corresponding to the rotation range of the operating lever, and has an elongated hole that engages with the engagement protrusion; When the gear is in the release position, the operating lever is rotatable between a locking position and an unlocking position 1, and when the operating lever is in the locking position, the gear is rotatable to a locking position to close the slot in the elongated hole. The actuating lever is restrained by bringing one end of the lever into contact with the engaging protrusion.

"Function" In the door lock driving device according to the present invention having the above configuration, the operating lever is provided with an engaging protrusion extending parallel to the axis of movement of the operating lever, and is activated by restraining the engaging protrusion. Rotation of the lever is prevented.

Further, a locking gear provided with an elongated hole that engages with the engagement protrusion with an angle of play is driven by a locking motor via an ohm gear having an automatic tightening function. By setting the lead angle of the two ohm to a small value, the two ohm gear
It is possible to provide an automatic tightening function that makes it impossible to drive the ohm, which is the driving side, from the worm wheel side, which is the driven side, and the door lock drive device according to the present invention has the above-mentioned automatic tightening function of the worm gear.
With a small number of parts, the locking gear that is in the locking position and restraining the operating lever in the locking position is prevented from rotating due to external force.

In addition, the locking mechanism locks the operating lever directly by the locking gear and not through the main gear, so when changing from the unlocked state to the locked state. , and when changing from the locked state to the unlocked state, there is no interference between the locking gear and the main gear when the locking mechanism is activated, and the operation of the locking/unlocking mechanism and the operation of the locking mechanism are mutually exclusive. Since there is no need to provide a time difference between the locking and unlocking motors, the locking/unlocking motor switch operation and the locking motor switch operation can be performed at the same time.

Further, when changing from the locked state to the unlocked state, there is no need to provide a time difference between the operation of the locking/unlocking mechanism and the operation of the locking mechanism, so the locking/unlocking mechanism does not require a clutch.

Embodiment A door lock drive device which is an embodiment of the present invention will be described below with reference to the drawings.

Fig. 1 is a front view showing a door lock drive device for an automobile together with a schematic diagram of the door lock body, and Fig. 2 is its n-nal1.
7r side view.

In the lock/unlock mechanism, a pinion 2 is fixed to the shaft of a lock/unlock motor 1, and an intermediate pinion 4 is formed coaxially and integrally with an intermediate gear 3 that meshes with the pinion 2.

A main galley, which is a sector gear and meshes with the intermediate pinion 4, is rotatably assembled to the output shaft 8. The operating lever 7 is coaxial with the main gallery, and has a roughly oval-shaped center hole.
It engages with a width across flats processed portion provided at one end of the output shaft 8.

The actuation lever 7 is provided with an engagement protrusion 7a extending parallel to the output shaft. A door lock body 16 is attached to the other end of the output shaft 8.
The output lever 9 connected to is fixed by caulking. The main gallery is provided with an elongated hole 5a that engages with the engagement protrusion 7a of the operating lever 7. An angle of play corresponding to the rotation angle of the output lever 9 is provided between the elongated hole 5a and the engagement protrusion 7a. A spring 6 is attached to the main gallery, and both ends of the spring 6 are in contact with a protrusion 13a provided inside the cover 13, and between the elongated hole 5a and the engagement protrusion 7a, the angle corresponds to the rotation angle of the output lever 9. The main gear is always biased towards a neutral position where a certain angle of play can be obtained.

In FIG. 1, the locked position of the output lever 9 is shown by a solid line, and the unlocked position is shown by a dashed line. Rotate with. The output lever 9 is connected via a connecting rod 15 to a door lock body 16 disposed inside the door and a lock knob 18 disposed on the door 17 so as to be movable forward and backward.

Next to the locking fi, a worm 11 is fixed to the shaft of the locking motor 10, and a sector gear-shaped locking gear 12, which is a worm wheel that meshes with the worm 11, is connected to the output shaft between the main galley and the operating lever 7. 8 is rotatably assembled. The worm 11 is connected to a locking gear 12 on the driven side.
It is equipped with an automatic tightening function that reduces the advance angle to prevent the lock from being reversed. The engagement gear 12 is provided with an elongated hole 12a that engages with the engagement protrusion 7a of the operating lever 7. An angle of play corresponding to the rotation range of the output lever 9 is provided between the elongated hole 1.2a and the engagement protrusion 7a.

The reduction ratios of the main gear 5 and the locking gear 12 are set so that their rotational angular velocities during operation are approximately equal.

"Operation" Next, we will explain the operation of the above structure in Figures 1 and 3 (a) to (c).
). 35th! I(a) to (C) show the main parts of the door lock driving device shown in FIG.

FIG. 3(a) shows the unlocked state, in which case the output lever 9
and the operating lever 7 are in the unlocked position, and the main gear is in the neutral position, being biased by the spring 6 shown in FIG.
The locking gear 12 is in the released position. In this state, main gear 5
An angle of play corresponding to the rotation range of the output lever 9 is obtained between the elongated hole 5a of the locking gear 12, the elongated hole 12b of the locking gear 12, and the engagement protrusion 7a of the operating lever 7, and is driven by manual locking. is the output lever 9 inside the door lock drive device. There are only three points: the output shaft 89 and the operating lever 7, and manual locking can be done with a small amount of force.

If electric locking is performed from this state, the lock/unlock motor 1 shown in FIG. 1 rotates counterclockwise, and the intermediate gear 3. The intermediate pinion 4 rotates clockwise,
The main gallery rotates counterclockwise while compressing the spring 6, and connects the operating lever 7, the output shaft 8. Then, the output lever 9 is rotated counterclockwise to reach the locked position. After the output lever 9 reaches the locked position, when the power supply to the lock/unlock motor 1 is stopped, the main galley urged by the spring 6 is rotated clockwise and returns to the neutral position. At this time, as the main gear rotates clockwise, the intermediate pinion 4. The intermediate gear 3 is rotated counterclockwise, and the pinion 2 is rotated clockwise.

In this way, the locked state shown in FIG. 3(b) is achieved. At this time, the main gear has returned to the neutral position, and the locking gear 1
2 is in the unlocked position, the output lever 9.2 is driven by manual unlocking within the door lock drive device. There are only three points: the output shaft 88 and the operating lever 7.
Manual unlocking can be done with very little force.

To unlock the door electrically from the locked state shown in Figure 3(b),
The direction of energization to the locking/unlocking motor 1 is reversed from that at the time of locking, and as a result, the locking state returns to the unlocked state shown in FIG. 3(a).

Next, a description will be given of the operation when changing from the unlocked state shown in FIG. 3(a) to a locked state in which unlocking by manual operation is prevented.

The lock/unlock motor 1 and the locking motor 10 are simultaneously energized, the main gear 5 and the locking gear 12 are rotated counterclockwise, and the operating lever 7, output shaft 8, and output lever 9 are placed in the locked position. reach it. After the output lever 9 reaches the locked position,
When the power supply to the locking/unlocking motor 1 and the locking motor 10 is stopped, the main galley returns to the neutral position as shown in Fig. 3 (C
) will be in the locked state shown. In this state, the engaging protrusion 7a of the operating lever 7 is restrained by one end of the long hole 12a of the locking gear 12, and the locking gear 12 is locked in the locking position by the worm 11 having a reverse rotation prevention function. Manual unlocking is prevented.

Next, the operation when performing an unlocking operation from the locked state shown in Section 1a(C) will be explained. The lock/unlock motor 1 and the locking motor 10 are energized at the same time, and the main gear 5 and the locking gear 1 are turned on.
2 in the clockwise direction to bring the operating lever 7, output shaft 8, and output lever 9 to the unlocked position. At this time,
The rotational angular speeds of the main gear 5 and the locking gear 12 are almost equal, and the locking gear 12 does not brake the rotation of the main gear via the engagement protrusion 7a, and the output lever 9 is in the unlocked position. After reaching the lock/unlock motor 1. Positive phase motor 1
When the energization to 0 is stopped, the main gear returns to the neutral position, and the locking gear 12 stops at the release position, as shown in FIG. 3(a).
It will be in the unlocked state as shown in Figure 2, and you can manually lock it again with a small amount of force.

"Effects of the Invention" As explained above, the door lock drive device of the present invention has the following features:
In a device equipped with a locking/unlocking mechanism that drives the door lock body and a locking mechanism that mechanically prevents unlocking by manual operation when the door is locked, the locking/unlocking mechanism is mainly operated by a locking/unlocking motor. The locking mechanism includes an operating lever that is driven by a gear to rotate between a locked position and an unlocked position, and is provided with an engaging protrusion that extends parallel to the wheel line of the rotation. The lever is driven by a motor through a worm gear having an automatic tightening function, and rotates coaxially with the operating lever between a locking position and a release position, and has an angle of play corresponding to the rotation range of the operating lever. and a locking gear having an elongated hole that engages with the engagement protrusion, and when the locking gear is in a released position, the actuating lever can be freely rotated between a locked position and an unlocked position. , when the actuating lever is in the locked position, it is rotated to the locking position and one end of the elongated hole is brought into contact with the engagement protrusion, thereby restraining the actuating lever.

The actuation lever is restrained by the locking mechanism because the locking gear, which is driven by the locking motor via the worm gear which has a reverse rotation prevention function, acts directly on the actuation lever without going through the main gear. There is no interference with the locking gear, and the main motor and the locking motor can be operated simultaneously. This eliminates the need to provide a time difference between the operations of both motors, resulting in an excellent effect of improved operability.

In addition, when changing from the locked state to the unlocked state, there is no need to provide a time difference between the activation of the locking/unlocking mechanism and the activation of the locking mechanism, so the locking/unlocking mechanism does not require a clutch.
This has the advantage of reducing the number of parts and making it possible to provide an inexpensive door lock drive device.

[Brief explanation of drawings]

Fig. 1 is a front view showing a door lock driving device according to an embodiment of the present invention together with a hint of the door lock body, Fig. 2 is a sectional view taken along the line ■-■ of the door lock driving device, and Figs. 3(a) to 3). (
c) is an explanatory diagram of the operation of the door lock drive device, FIG. 4 is a longitudinal sectional view showing the conventional door lock drive device together with a hint of the door lock body, and FIGS. 5(a) to (C) are diagrams of the conventional door lock drive device. FIG. 3 is an explanatory diagram of the operation of the lock drive device. 112. Lock/unlock motor, 590. Main gear, 5a. 1. Long, 7011 operating lever, 7 a, engagement protrusion, 10, locking motor, 11,...
Worm, 12, Locking gear, 12a, Long hole, 16. ,. Door lock body. Figure-■ Figure 2 (a) Figure (a)

Claims (1)

[Scope of Claims] A door lock driving device comprising a locking/unlocking mechanism that drives a door lock body and a locking mechanism that mechanically prevents unlocking by manual operation when the door is locked. The mechanism includes an actuation lever that is driven by a locking/unlocking motor via a main gear to rotate between a locked position and an unlocked position, and is provided with an engagement protrusion extending parallel to the axis of rotation, The locking mechanism is driven by a locking motor through a worm gear having an automatic tightening function, and rotates coaxially with the operating lever between a locking position and a release position, and the rotation range of the operating lever is controlled by the locking motor. a locking gear having an elongated hole that engages with the engagement protrusion and having an angle of play corresponding to the locking gear; and when the actuating lever is in the locked position, the actuating lever is rotated to the locking position and one end of the elongated hole is brought into contact with the engaging protrusion, thereby restraining the actuating lever. Features: Door lock drive device.