JPH0347383A - Door lock device for car - Google Patents

Abstract

PURPOSE:To make automatically fully lockout control after the full latch by providing a cam corresponding to the limit of opening and closing of a cam follower making linear motion by interlocking with the cam surface to a final step gear and, proving a switch. CONSTITUTION:A final step gear 21 provided with a position detecting cam 27 is placed to a cam shaft 20 driven through a deceleration gear mechanism. The cam surface corresponding with an open directional moving limit and a close directional moving limit of a cam follower making linear motion by interlocking with the cam surface is placed to the cam 27. In addition, a position switch 28 adjacent through a lever 29 is provided to the cam surface. Control force for obtaining a full latch state is reduced and, at the same time, fully lockout control after the full latch is made automatically. According to the constitution, a lock device can be made compact.

Description

[Detailed Description of the Invention] [Object of the Invention] <Industrial Application Field> The present invention relates to a door lock device for an automobile, and in particular, the present invention relates to a door lock device for an automobile, which can reduce the operating force required to obtain a fully latched state, and
The present invention also relates to a door lock device configured to automatically perform a complete closing operation after full latch.

<Prior Art> In order to prevent the generation of wind noise and wind leakage noise from around the door, the pressing reaction force of a weather strip provided in the gap between the door and the vehicle body tends to be increased. As a result, there are disadvantages such as being forced to increase the force required to close the door, or causing an increase in the sound generated by the sudden door closing operation and an increase in the change in air pressure inside the vehicle.

In order to eliminate this inconvenience, the striker is configured to be movable along the opening/closing direction of the door, and
For example, there is a door lock device in which a latch device and a striker are engaged with each other at a position where the strip's pressing reaction force does not act, that is, at a partially closed position of the door, and then the striker is moved toward a fully closed position. Jitsukai 1986-
It is operated in publications such as No. 144173.

By the way, as a drive device for such a door lock device, there is a drive device that uses a DC motor as the drive source and converts the rotational force of the DC motor into reciprocating linear motion of a striker using a gear reducer and a cam mechanism. The device is well known. The operation of the DC motor in this device is controlled by intermittent current flow using a rotary switch that rotates together with the rotating member of the reducer or cam mechanism (see Japanese Patent Laid-Open No. 60-59278), or by rotating the striker in each direction. Detecting the movement limit of the motor using a limit switch and controlling the operation of the DC motor using these contact signals (see Japanese Utility Model Publication No. 12044/1983) is known as boat fishing.

<Problems to be Solved by the Invention> However, since the rotary switch is provided on the axis of the rotating shaft, configuring the switch as a subassembly has the disadvantage of increasing the axial dimension of the entire device. Furthermore, if a terminal or a contactor is built into a device, such as in a wiper motor, the switch cannot be made into a subassembly, which inconveniently complicates the assembly process.

On the other hand, when using a limit switch, a detector must be provided adjacent to an appropriate movable member that can be displaced between three positions to detect each of the two positions, which increases the size and complexity of the device structure. There is an inconvenience that leads to

The present invention was devised to improve such inconveniences, and its main purpose is to simplify the configuration of a switch for controlling the moving position of the engagement holding member between the door and the vehicle body. The object of the present invention is to provide an improved door locking device that can be used as a door lock device.

[Structure of the Invention] Means for Solving the Problems According to the present invention, such an object is to maintain an opening/closing body such as a door closed with respect to a vehicle body by moving the opening/closing body to each other in a semi-closed position. an engageable latch device and a striker; and a drive provided in at least one of the latch device and the striker to move the opening/closing body toward a fully closed position after the latch device and the striker are engaged. In an automobile door lock device having a device,
The drive device includes a camshaft that is rotatably driven via a reduction gear mechanism, a cam follower that engages with the cam formed on the camshaft and performs linear reciprocating motion, and a cam follower that is integral with the camshaft and that rotates the cam follower. a final stage gear member having two cam surfaces in the same plane at a circumferential position corresponding to the movement limit in the door opening direction and the movement limit in the door closing direction, and a lever that can be tilted in contact with the cam surface. This is achieved by providing an automobile door lock device characterized in that it has a switch means disposed at a position radially adjacent to the final stage gear member.

<Operation> With this configuration, the lever of the switch means selectively comes into contact with one of the two cam surfaces integrally formed on the final stage gear member as the final stage gear member reciprocates. Depending on the direction in which the lever is tilted at this time, it is possible to detect in which direction the movement limit of the cam follower is.

<Embodiments> Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows the mounting portion of a vehicle door lock device to which the present invention is applied.

A ratchet type latch device 4 is installed in a space 3 inside a door rear end surface 2 formed by bending the door inner panel 1b toward the door outer panel 1a. A striker 7 is protruding from the front end surface 6 of the center pillar or rear pillar of the vehicle body 5, in which the body outer panel 5b is bent toward the body inner panel 5a, and is engaged with the latch device 4 to keep the door 1 closed. ,
A drive device 9 for moving the striker 7 along the opening/closing direction of the door 1 is installed in the space 8 inside the vehicle body. Furthermore, a weather strip 10 is attached to the corner of the rear end face 2 of the door between the door 1 and the vehicle body 5 to ensure airtightness when the door is closed.

As shown in FIGS. 2 to 4, the drive device 9 includes a gear box 11 that accommodates a group of reduction gears, and a synovial fluid member 12 made of fluororesin or the like pasted on the opposing surface of the gear box 11. A guide plate 14 having a guide recess 13 formed therein, a slide plate 15 as a cam follower held in the guide recess 13 so as to be slidable along the opening/closing direction of the door 1, and a group of reduction gears. It consists of a DC motor 16 for driving. This drive device 9 is configured such that the guide plate 14 and the outer plate 17 are collinear with the guide plate 14 with the front end surface 6 of the vehicle body 5 and the outer plate 17 with flat head bolts 18.
It is fixed to the vehicle body 5 with the body outer panel 5b sandwiched between.

On the other hand, the striker 7 is formed by molding a core metal 7a, which is a round bar bent into a U-shape, with an outer sheath 7b made of an elastic resin material (Fig. 4), and is integrally fixed to the slide plate 15. has been done. The striker 7 protrudes from the front end surface 6 of the vehicle body through an opening 14a formed in the guide plate 14 and an opening 17a formed in the outer plate 17.

The reduction gear group housed in the gear box 11 is integrally fixed to a camshaft 20 having an eccentric pin 19 protruding from its shaft end that engages with a long hole 15a formed in the slide plate 15. a final stage gear 21, a pinion gear 22 that meshes with the final stage gear 21, a worm wheel 23 that is integrally formed with the pinion gear 22, and a worm wheel 23 that meshes with the worm wheel 23 and is fixed to the output shaft of the DC motor 16. It consists of a worm gear 24 and a DC motor 1.
The rotational force of the camshaft 20 is converted into the rotational force of the camshaft 20 after being appropriately decelerated. The final stage gear 21 is formed with an arcuate slot 25 that is concentric with the camshaft 20 and extends at an angle of approximately 180 degrees.
By providing a pin 26 with both ends fixed to the slot 25 so as to pass through the slot 25, the rotation angle of the final stage gear 21 is mechanically defined.

Approximately 180 mm is provided at one axial end of the final stage gear 21.
The lower part 27 is formed by cutting off the outer peripheral surface over a range of degrees.
A position detecting cam 27 having a shape a is formed. A position switch 28 is attached to the upper part of the gear box 11 adjacent to the outer periphery of the final stage gear 21. This position switch 28 has a lever 29 for driving a built-in movable contact, and this lever 29 has its tip facing the lower portion 27a of the position detection cam 27.

As shown in FIG. 5, inside the position switch 28, there is a movable contact member 30 which is approximately in the shape of a horseshoe and is rotatable within a predetermined angular range in response to the tilting of the lever 29, and a movable contact member 30 which is configured to rotate within a predetermined angle range in response to the tilting of the lever 29. The circumference is divided into three parts 31a and 3.
It has a fixed contact member 31 consisting of 1b and 31c. Here, the lever 29 is always maintained at a neutral position by a spring force. When no external force is applied to the lever 29, convex portions 30a, 30b, and 30c are provided at both ends and the center of the movable contact member 30, respectively.
The positional relationship between the fixed contact members 31a, 31b, and 31c is as shown in FIG. 7a.・30b are in contact with each other, and the fixed contact member 31
The central convex portion 30 of the movable contact member 30 is attached to the grounding portion 31c of the movable contact member 30.
c are in contact. In this state, as shown in FIG. 7b, two terminals 31a and 31 are connected in parallel to each other.
b and the grounded common terminal 31c are both in a closed state.

When the final stage gear 21 is in the state shown in FIG. 3 and the lever 29 of the position switch 28 is pushed leftward by one cam surface 27b of the position detection cam 27,
The rotational position of the movable contact member 30 is as shown in FIG. 6a. At this time, the relationship between the movable contact member 30 and each fixed contact member 31 is as shown in FIG. The other convex portion 30b of the movable contact member 30 is in contact with the second portion 31b of the fixed contact member 31, and the central convex portion 30c of the movable contact member 30 is in contact with the grounding portion 31c of the fixed contact member 31. In this state, as shown in FIG. 6b, the common terminal 31c and the first terminal 31a are opened,
The common terminal 31c and the second terminal 31b are in a closed state.

When the final stage gear 21 rotates clockwise in FIG. 3 and the lever 29 of the position switch 28 is pushed to the right by the other cam surface 27c of the position detection cam 27, the movable contact member 30 rotates. As a result, the state shown in FIG. 8a is reached. At this time, the relationship between the movable contact member 30 and each fixed contact member 31 is as shown in FIG. The other convex portion 30b of the movable contact member 30 is aligned with the blank portion on the fixed contact side, and the central convex portion 30c of the movable contact member 30 is in contact with the ground portion 31c of the fixed contact member 3.1. In this state, as shown in FIG. 8b, the common terminal 31c and the first terminal 31,a are closed, and the common terminal 31c and the second terminal 31b are opened.

Next, the latch device 4 provided on the door 1 side will be explained with reference to FIGS. 9 to 11.

The latch device 4 is basically of a known type, and is provided inside a casing 35 which has a guide groove 34 recessed to allow the striker 7 to enter therein, and is rotatable when pressed by the striker 7. A latch member 36 that is rotatably biased in the return direction by a spring means (not shown), and a pair of ratchet pawls 3 provided at appropriate positions on the outer periphery of the latch member 36.
A ratchet pawl 38 that engages with 7a and 37b to prevent the latch member 36 from returning is pivotally supported.

A notch 39 that engages with the striker 7 is formed at a suitable location on the outer periphery of the latch member 36. Also, the ratchet pawl 38 locks the ratchet pawls 37a and 37b by the spring 40.
The latch member 36 is always biased in the direction of engagement with the latch member 36 in the direction in which the striker 7 enters the guide groove 34.
However, in the direction in which the striker 7 is disengaged, the ratchet claws 37a and 37b engage with either one of the ratchet claws 37a and 37b to restrict the rotation of the latch member 36, thereby preventing the striker 7 and the latch member 36 from rotating. The engagement is maintained. Further, a latch switch 41 for detecting the fully latched state of the latch member 36 is connected to the latch member 36.
It is provided at a position opposite to the peripheral edge of.

A cushion member 43 is provided at the end of the guide groove 34 to elastically define the limit of entry of the striker 7.

Next, the control circuit of the above-described apparatus of the present invention will be explained with reference to FIG. Although this device is provided for each door, it has a door-to-door configuration and each door is independently controlled, so only one of them will be explained.

In order to control the DC motor 16 for moving the striker 7 in response to the opening/closing operation of the door 1, this device includes three electromagnetic relays 51, 52, and 53. These electromagnetic relays 51, 52, 53 have common terminals 51c, 52
c.53c and normally oven terminals 51a, 52a, and 53a that close between the common terminal and the common terminal when the coil is excited;
They each have normally closed terminals 51b, 52b, and 53b that similarly close the connection with the common terminal when the coil is demagnetized.

The anode of the vehicle battery 54 is connected to the first
It is connected to one end of the coil 51d and the common terminal 51c of the electromagnetic relay 51, and the circuit breaker 5
6 to normally open terminals 52a and 53a of both second and third electromagnetic relays 52 and 53, respectively. The other end of the coil 51d of the first electromagnetic relay 51 is connected to the anti-ground terminal of the latch switch 41. Note that the latch switch 41 is configured to open when the latch member 36 and the striker 7 are completely engaged.

The second fixed contact member 31b of the position switch 28 is connected to the normally closed terminal 51b of the first electromagnetic relay 51 via the coil 52d of the second electromagnetic relay 52. Further, the first fixed contact member 31a of the position switch 28 is connected to the normally open terminal 51a of the first electromagnetic relay 51 via the coil 53d of the third electromagnetic relay 53. And both the second and third electromagnetic relays 52.
The common terminals 52c and 53c of 53 are connected to both poles of the DC motor 16, respectively, and are also connected to the normally closed terminals 52b and 53 of both the second and third electromagnetic relays 52 and 53.
b are both grounded.

Each ground terminal is connected to the cathode of the vehicle battery 54.

Next, the operation procedure of the above embodiment will be explained.

First, in a completely closed state where the latch device 4 and the striker 7 are engaged, the latch switch 41 that detects the fully latched state of the latch member 36 is in a depressed state as shown in FIG. Here, the latch switch 41 is
Since it is connected to the control circuit through a normally closed contact, and in this state both terminals are open, the coil 51 (f) of the first electromagnetic relay 51 is in a demagnetized state.

Further, the position switch 28 has a first fixed contact member 31a and a ground contact member 3, as shown in FIGS. 8a to 8b.
1c is closed, and the second fixed contact member 31b and the ground contact member 31c are open. Therefore, the intermittent state between each terminal is as shown in FIG. 12, and the DC motor 16 is in a stopped state.

On the other hand, in this state, the eccentric pin 19 and the final square gear 21 are located on the opposite side from the rotational position shown in FIGS. 3 and 4, and therefore the striker 7 is positioned as shown in FIG. Next, when the door handle is operated, for example, the engagement between the ratchet pawl 38 and the ratchet pawl 37b on the full latch side is released, and the latch member 36 is rotated back. Latch switch 41 closes. As a result, the coil 51d of the first electromagnetic relay 51 is excited and the normally open terminal 51a is closed, so the coil 52d of the second electromagnetic relay 52 cannot be excited, so the normally closed terminal 52b is closed. When the normally open terminal 51a of the first electromagnetic relay 51 closes, the coil 5 of the third electromagnetic relay 53 closes.
3d is excited, and this normally open terminal 53a is closed. As a result, a current flows in a direction that causes the DC motor 16 to rotate forward, that is, to drive the striker 7 outward.

When the position detection cam 27 rotates with the rotation of the final stage gear 21, the lever 29 of the position switch 28 faces the lower part 27a of the cam and becomes neutral, and the first and second double-sided constant contact members 31a and 31b are both grounded, but the first to
By the action of the third electromagnetic relays 51 to 53, the DC motor 1
6 continues rotation.

Due to the normal rotation of the DC motor 16, the eccentric pin 19 rotates counterclockwise in FIG. 3 around the camshaft 20 of the final stage gear 21, and the slide plate 15 is moved to the left. As the slide plate 15 moves to the left, the striker 7 is moved along the guide recess 13 to the forward position outside the vehicle interior (imaginary line in FIG. 1).

When the final stage gear 21 rotates and the lever 29 of the position switch 28 is pressed by one cam surface 27b (the third
state shown in the figure), the first fixed contact member 31a and the ground contact member 31c are opened, and both the second and third electromagnetic relays 52 and
Since the coils 52d and 53d of 53 are both demagnetized, the DC motor 16 is stopped and the forward position of the striker 7 is maintained. At this time, since the rotation angle of the final stage gear 21 is defined by the slot 25 and the pin 26, overrun is prevented.

When the door 1 is closed from this state, the latch member 36 rotates while the striker 7 engages with the notch 39 as shown in FIGS. 9 to 11. At this time, since the striker 7 is located on the outside of the vehicle body after the above-described process, the fully latched state shown in FIG. 11 is realized before the weather strip 10 provided on the door 1 side is suppressed and deformed. In this state, although the door is in the fully latched state, it appears to be in a so-called ajar state, and since the pressing reaction force of the weather strip 10 has not yet acted significantly, the fully latched state can be achieved with a relatively small closing operation force. can do.

As described above, when the latch member 36 rotates to the fully latched position shown in FIG. The multi-close terminal 51b is closed. At this time, since the position switch 28 is closed between the second fixed contact member 31b and the ground contact member 31c, the coil 52d of the second electromagnetic relay 52 is excited and the normally open terminal 52a is closed. Further, the coil 53d of the third electromagnetic relay 53 is demagnetized because the normally open terminal 51a of the first electromagnetic relay 51 is open, and the normally closed terminal 53b is closed. As a result, a current flows in a direction that reverses the direction of the DC motor 16, that is, a direction that causes the striker 7 to move backward.

As one eccentric pin rotates clockwise in FIG. 3 as the DC motor 16 reverses, the slide plate 15 and the striker 7 forcibly slide along the guide recess 13 toward the interior of the vehicle. I am made to do so. and eccentric pin 1
9 is rotated by a predetermined angle, the DC motor 16 is rotated in the same manner as described above until each contact of the position switch 28 is in the state shown in FIGS. 8a and 8b and the coil 52d of the second electromagnetic relay 52 is demagnetized. rotates. and pin 26
Also, the final stage gear 21 is mechanically stopped, and the completely closed state is realized again.

[Effects of the Invention] As described above, according to the present invention, it is possible to detect the three states of the forward rotation limit, reverse rotation limit, and mid-rotation of the camshaft for giving reciprocating linear motion to the striker with one switch. can.

Moreover, this switch can be installed internally in the drive device as a subassembly, and can also be installed at a position adjacent to the outer peripheral surface of the position detection cam that is integrally formed on the final stage gear. without increasing the axial dimension of. Therefore, a great effect can be achieved in promoting the simplification and downsizing of the structure of this type of automobile door lock device.

[Brief explanation of drawings]

FIG. 1 is an installation diagram of an automobile door lock device according to the present invention on a door and a vehicle body, and FIG. 2 shows a partially cutaway view of the striker drive device along the line ■-H in FIG. FIG. 3 is a cross-sectional view showing a second
4 is a view taken along the line IV-IV in FIG. 2; FIG. 4 is a view taken along line IV-IV in FIG. 2; Fig. 5 is an exploded perspective view conceptually showing the mechanism of the position switch, Figs. 6a, 7a, and 8a are explanatory diagrams of the operation of the position switch, and Figs. 6b, 7b, and 8b correspond to each other. This is a model diagram. 9 to 11 are explanatory diagrams of the operation of the latch device. FIG. 12 is a control circuit diagram of the device of the present invention. 1... Door 4... Latch device 5...
Vehicle body 7... Striker 9... Striker drive device 10... Weather strip 11... Gear box 12... Side member 13...
・Guide recess 14...Guide plate 15...
Slide plate 16...DC motor 17...Outer plate 1
9... Eccentric pin 20... Camshaft 21... Final stage gear 27... Cam for position detection 27a... Low part 27b, 27c... Cam surface 28... Position switch 29...・Lever Patent Applicant Honda Lock & Co., Ltd. Patent Attorney Yo Oshima Figure 1 Figure 3 Figure 2 Figure 4v! J Figure 5 Figure 10 Figure 9 Figure 11

Claims (2)

[Claims] (1) A latch device and a striker that can be engaged with each other in a semi-closed position of the opening/closing body in order to keep the opening/closing body such as a door closed with respect to the vehicle body; and after the latch device and the striker are engaged, the A door lock device for an automobile comprising a drive device provided on at least one of the latch device and the striker to move the opening/closing body toward a fully closed position, wherein the drive device rotates through a reduction gear mechanism. A camshaft to be driven; a cam follower that engages with a cam formed on the camshaft to perform linear reciprocating motion; and a cam follower that is integral with the camshaft and has a movement limit in the door opening direction and a movement limit in the door closing direction. a final stage gear member having two cam surfaces in the same plane at circumferential positions corresponding to the cam surfaces, and a lever that is tiltable in contact with the cam surface and is adjacent in the radial direction of the final stage gear member. A door lock device for an automobile, characterized in that it has a switch means arranged at a position. (2) The automobile door lock device according to claim 1, wherein the rotation limit of the final stage gear member is defined by a mechanical stopper means.