JPH01250580A - Automobile door lock device - Google Patents

Abstract

PURPOSE:To detect accurately and to increase reliability without committing any error detection by receiving only a first operating signal of a switching means operating with turning of a latch member interlocked. CONSTITUTION:A driving means is constituted of a motor MT, a driving gear and a cable 15, a driving control means is constituted of a flip-flop FF and relays R1 and R2, and a half-lock detection means is constituted of a differentiation circuit DC and a timer T1. When a half lock detection switch SW1 outputs an operating signal in case a latch plate 11 moves from an open position to a half lock position, the half lock detection means detects it, but an operating signal caused by the motions of an open lever 16 in case of door opening is not detected. According to a signal from the half lock detection means, the plate 11 is driven from a half lock condition to a full lock condition by the driving means, and a door lock can be surely made.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a locking device for an automobile door, and in particular detects a half-locked state to ensure a full-locked state.

B. Prior Art When closing a car door, the closing force is large and heavy due to the reaction force of the weather strip that seals the door and the opening of the car body and the reaction force of the air trapped in the passenger compartment. Therefore, if the closing force is small, the door lock device enters a half-locked state, so it is necessary to close the door with a large closing force. In order to reduce the closing force of the door, when the door lock device is in the half-locked state, it automatically operates the door to the full-locked state and closes the door completely.
A device disclosed in Japanese Patent No. 137067 and a device proposed in Japanese Patent Application No. 1982-262456 previously filed by the present applicant are known.

FIGS. 5(a) and 5(b) schematically explain such a device, with (a) showing the half-locked state.

(b) shows the full lock state. The latch plate 1, pawl 2, and drive lever 3 are provided on the sliding door side (not shown), and when the sliding door is closed in the six directions of the arrows,
First, the striker 4 on the vehicle body side and the latch plate 1 are engaged in a half-locked state as shown in the figure. Therefore, this half-locked state is detected by a signal from a contact provided between the sliding door and the vehicle body, and the drive lever 3 is rotated in the direction B in the drawing by a motor (not shown). As a result, the latch plate 1 engaged with the striker 4 rotates in the C direction via the latch lever 1a, and the door is forcibly closed in the direction of the arrow A.
5(b), the pawl 2 prevents the latch plate 1 from moving in the door opening direction (clockwise).

When a door handle (not shown) is operated to open the door, the pole 2 rotates in the direction shown, and the latch plate 1
Once the latch plate 1 is rotated counterclockwise, the engagement between the two is released, and when the door is opened in the direction E in the figure, the engagement between the latch plate 1 and the striker 4 is released, and the door is opened.

C6 Problems to be Solved by the Invention In this type of device, half-lock detection is performed using a signal from a contact point provided between the door and the vehicle body, so the half-lock position of the latch plate cannot be accurately detected. I can't do it,
This type of locking device may not work properly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a locking device for an automobile door that directly detects a half-locked state from the movement of a latch member and always operates correctly to reliably lock the door.

Means for Solving the D0 Problem In the present invention, a latch member that rotates from an open position through a half-lock position to a full-lock position and is biased toward the open position is pivotally mounted on the door side. A striker that faces the member and operates the latch member to the fully locked position by the door closing operation is fixedly installed on the vehicle body side, and a restraining member that stops the biasing force of the latch member to the open position when the door is fully locked is provided on the door side. The present invention is applied to a locking device for an automobile door in which, when the door is opened, the engagement between the restraining member and the latch member at the full lock position is released in conjunction with the door opening operation, and the latch member is returned to the open position. The above-mentioned problem is solved by the drive means for driving the latch member in the half-lock position to the full-lock position, the movement of the latch member from the open position to the half-lock position, and the movement of the restraint member when the door is opened. a switching means; a half-lock detection means for detecting only the actuation signal obtained when the latch member rotates from the open position to the half-lock position; and a response to the detection signal from the half-lock detection means; The problem is solved by providing a drive control means for controlling the drive means so that the latch member is driven from the half-lock position to the full-lock position.

When the switching means outputs an activation signal when the E0 action latch member moves from the open position to the half-lock position, the half-lock detection means detects this, but the activation of the switching means due to the movement of the restraining member when the door is opened No signal detected. The drive means is driven in response to a detection signal from the half-lock detection means, and the latch member is driven from the half-lock state to the full-lock state. Therefore, the door is reliably rotated, and even if the switching means outputs an activation signal due to the movement of the restraining member when the door is opened, the driving means is not driven, and the door can be opened without any problem.

F. Example One embodiment will be described based on FIGS. 1 to 4.

FIG. 2(a) is a front view of the latch device in an open state, in which a latch plate (latch member) 11 is rotatably supported by a sliding door (not shown), and this latch plate 11 is fixed to a vehicle body (not shown). striker 12
By engaging with the slide door, the slide door sequentially rotates from the open position to the half-lock position to the full-lock position, and the sliding door is locked to the vehicle body at the full-lock position.

A counterclockwise rotational force is applied to the latch plate 11 by a spring (not shown), and the latch plate 11 is always biased toward the open position. A protruding latch plate 112 is provided on the latch plate 11 and engages with the lever arm 141 of the drive lever 14 in the open state to lock the rotational force. A cable 15 is connected to a lever arm 142 of the drive lever 14, and when half-locked, the drive lever 14 is driven counterclockwise via the cable 15, and the latch plate 11 is fully locked. In the locus of movement of the lever arm 142, there is a full lock detection switch S that is turned on when the lever arm 142 is fully locked.
W2 is installed.

On the other hand, the open lever 16 as a restraining member that constantly comes into contact with the outer peripheral surface of the latch plate 11 is connected to the open rod 1.
Rotate counterclockwise by pushing down 7 in the U direction,
When in the fully locked state, the latch plate 11 is rotated counterclockwise to the open position by the above-mentioned biasing force. Furthermore, when the latch plate 11 is in the half-lock position, the open lever 16 engages with the pawl 113 to lock the biasing force, and when the latch plate 11 is in the full-lock position, the open lever 16 engages with the pawl 113.
and locks the biasing force.

A half-lock detection switch (switching means) SWI is arranged within the counterclockwise rotation locus of the open lever 16, and when the latch plate 11 rotates counterclockwise from the open position to the full lock position, When the pawl 113 pushes up the open lever 16 (see Fig. 2 (b)), and when the pawl 114 pushes up the open lever 16 just before the full lock (see Fig. 2 (d3)), the half-lock detection switch SW1 is activated. This half-lock detection switch SWI is turned on when the open lever 16 is operated counterclockwise by pushing down the open rod 17 (see Fig. 2(e)).
Also turns on. As described above, since the half-lock detection switch SWI is also turned on when the open lever 16 is operated by the open rod 17 when the door is opened, the on-detection signal of the half-lock detection switch SWl is received only when a half-lock is detected. In this embodiment, a differentiating circuit, which will be described later, is provided.

2(a) to 2(e) are diagrams showing changes in the engagement between the striker 12 and the latch plate 11 when closing the door, from the open state in (a) to the latch plate 11.
The striker 12 is pushed onto one of the protrusions 111 of the latch plate 11.
rotates clockwise, passes through a state on the verge of half-lock as shown in (b), and then enters a half-lock state as shown in (Q), and the pawl 113 engages with the open lever 16. When the door is further closed, the protruding pawl 114 of the latch plate 11 pushes up the open lever 16 as shown in FIG. Rotation is inhibited and the door is completely closed and locked. When the door handle (not shown) is operated from the fully locked state, the open rod 17 is pushed down via a well-known door remote control device and the open lever 16 is rotated counterclockwise, so that the open lever 16 and the claw 113. The latch plate 11 is disengaged from the pawl 114 and rotates counterclockwise by the biasing force thereof. As a result, when the sliding door is moved to open, the latch plate 11 and the striker 12 are disengaged and the door can be opened.

In the present invention, when the sliding door is closed in a half-locked state as shown in FIG. It is said that Therefore, the above-described drive lever 14 is provided, and the drive lever 14 is driven by a motor MT, which will be described later, to rotate the latch plate 11 to the full lock position.

FIG. 3 shows the drive system (drive means) of the drive lever 14.

A motor MT is fixed to a plate 51 fixed to the sliding door. A worm 52 is provided on the motor output shaft and meshes with a worm wheel 53 rotatably supported by the plate 51.

A ↓coat gear 54 is provided integrally with the worm wheel 53,
A sector-shaped drive gear 55 swingably supported by the plate 51
It meshes with. The above-described cable 15 is connected to the drive gear 55, and a neutral switch SW3 that is turned off when the drive gear 55 is in the neutral position is fixed to the plate 51.

FIG. 1 shows a control circuit 100 for a motor MT according to this embodiment.

A positive contact 31 and a negative contact 32 connected to the battery BT are protruded from the vehicle body 30 on the door opening/closing trajectory. From the sliding door 40, each of these contacts 31.
Contacts 41 and 42 are protrudingly provided opposite to 32, and these contacts constitute a switch SW4. Control circuit 10
0 is a flip-flop FF that controls the forward rotation relay R1 and the reverse rotation relay R2, the forward rotation relay R1 that forms a forward rotation circuit for energizing the motor MT in the forward direction, and the motor MT.
and a reversing relay R2 forming a reversing circuit for energizing in the reverse direction. In addition, there is a full lock switch SW2 that is turned on when the latch plate 11 is in the fully locked state, a neutral switch SW3 that is turned on when the drive gear 55 is turned off when it is in the neutral position, and turned on when the drive gear 55 is not in the neutral position, and a time period Ti for energizing the control circuit 100 from the battery BT when the door is closed. It has a timer TI that controls the timer TI. Furthermore, a differentiating circuit DC is interposed between the S terminal of the flip-flop FF and the switch SWI, and the time constant of the capacitor C and the resistor R of the differentiating circuit DC is determined by the timer T.
Set time I is set slightly longer than Ti. That is,
Within the set time Ti, when the half-lock detection switch SWI is turned on for the first time when the door is closed, its activation signal is applied from the differential circuit DC to the S terminal, but while the capacitor C remains charged, half-lock detection switch SW1
Even if the switch is turned on, a high level signal is not applied to the S terminal. On the other hand, an inverter I is connected between the full lock switch SW2 and the R terminal of the flip-flop FF.
NV is interposed, and when the full lock switch SW2 is turned on, a high level signal is output to the R terminal.

The motor MT causes the fan-shaped drive gear 55 to swing in forward and reverse directions, and rotates the drive lever 14 connected to the drive gear 55 by a cable 15. When the drive gear 55 in the initial position rotates forward, the drive lever 14 rotates counterclockwise, causing the latch plate 11 to rotate clockwise. When the drive gear 55 is reversed, the drive lever 14 rotates clockwise and returns to its initial position. Here, the motor MT, drive gear 55, and cable 15 constitute a drive means, the flip-flop FF and relays R1 and R2 constitute a drive control means, and the differential circuit DC and timer TI constitute a half-lock detection means. do.

The operation of the embodiment will be explained with reference to the time chart shown in FIG.

When you start closing the sliding door, the conductive switch SW4
is turned on, the control circuit 100 is connected to the battery BT, and the timer TI starts its time-limiting operation. Furthermore, when the sliding door is closed, the latch member 11 moves as shown in FIGS. 2(b) to 2(c).
When rotating to the half-lock position, the half-lock detection switch SW1 is turned on, and a high-level signal is applied to the S terminal of the flip-flop FF via the differential circuit DC. This half-locked state is the state shown in FIG. 2(C). As a result, the Q terminal of the flip-flop FF falls to a low level, and the forward relay coil RIC is energized, and the forward relay switch RIS becomes a.

Contact C connects, forming a forward circuit (first circuit) of switch SW4 → forward relay switch RIS a and Q contacts → motor MT → reverse relay switch R2S a and b contacts → switch sw4 → ground. The motor MT rotates normally.

As a result, the drive gear 55 swings clockwise in FIG.
The drive lever 14 rotates counterclockwise via the cable 15 to push the latch plate 11. The latch plate 11 rotates clockwise, and the striker 12 forcibly drives the sliding door. When the latch plate 11 rotates to the full lock position, the open lever 16 engages with the pawl 114, and the latch plate 11 is reliably restrained by the full lock. In the movement of each part above, the drive gear 5
5 swings from the initial position, the neutral switch SW3 changes from off to on.

When the drive lever 14 rotates counterclockwise to rotate the latch plate 11 to the full lock position, the full lock switch SW2 is turned on, and a high level signal is applied to the R terminal of the flip-flop FF via the inverter INV. The Q terminal becomes high level, the forward rotation relay coil RIG is demagnetized, the a and b contacts of the switch RIS are connected, and the forward rotation circuit is opened. At this time, switch SW4→
A circuit of neutral switch SW3→reverse relay coil R2C→a and b contacts of forward relay switch RIS→switch SW4→earth is formed, and reverse relay R2 is turned on to connect its a and Q contacts. As a result, switch SW4→
Reverse relay switch R2S a and Q contacts → motor MT →
Normally rotating relay switch RIS a and b contacts → switch SW
A reverse circuit (second circuit) of 4→ground is formed, and the motor MT is reversed.

This causes the drive gear 55 to swing in the reverse direction.

The drive lever 14 is rotated clockwise via the cable 15. When the drive gear 55 returns to the initial position, the neutral switch SW3 is turned off, the reverse rotation relay coil R2C is demagnetized, and the switch R2S is set to a.

B contact is connected. Therefore, the reversing circuit is opened and the motor MT is stopped.

On the other hand, when the door handle is operated to open a closed door, the open rod 17 is pushed down, as shown in Fig. 2 (a).
), the full lock detection switch SWI is turned on and the battery power supply BT is connected to the differentiating circuit DC, but within the predetermined time Ti set in the timer TI, the differentiating circuit D
Since capacitor C of C has not completely discharged,
The ON signal of the full lock detection switch SW1 cannot be accepted. Therefore, no high level signal is applied to the S terminal of the flip-flop FF, and driving of the motor MT during the door opening operation is prohibited. Furthermore, when timer TI finishes counting, even if switch SW4 is connected, battery B
Since T and the control circuit 100 are separated, the differential circuit D
Even if the capacitor C of C has completely discharged, the motor MT will not be driven in conjunction with the door opening operation.

As described above, in this embodiment, the half-locked state of the sliding door is detected in conjunction with the movement of the latch member 11 to the half-locked position, and in response to this detection signal, the motor MT
The latch plate 12 is rotated so that the engagement with the striker 12 is fully locked. As a result, the sliding door is completely closed and fully locked. Also.

When the door opening operation is performed within the above-mentioned timer setting time Ti, the half-lock detection switch SW1 is also turned on by the movement of the open lever 16, but the differential circuit DC prohibits reception of the operation signal. Further, when the full lock state of the latch plate 11 is detected, the motor MT is reversed to return the drive gear 55 to the initial position, and when the initial position is detected by the neutral switch SW3, the power to the motor MT is cut off and the motor MT is turned off. Stop.

Note that the combination of the differential circuit DC and the timer TI prohibits the reception of the operating signal output from the half-lock detection switch SWI other than when the half-lock is in effect.However, the same function can be achieved with other circuit configurations. can. Further, in this case, the timer is not necessarily an essential requirement.Furthermore, in the above embodiment, the drive lever 14 was rotated in the clockwise direction and counterclockwise direction by the forward and reverse rotation of the motor MT. By providing a mechanism between the motor MT and the drive lever 14 that converts the rotational motion into a swinging motion, which is composed of a cam, a link, etc., the drive lever 14 can be rotated clockwise and counterclockwise. It may also be driven.

In this case, the motor MT and the rotation-to-oscillation conversion mechanism constitute a driving means.

G8 Effects of the Invention According to the present invention, the half-locked state is detected by the switching means that operates in conjunction with the rotation of the latch member from the open position to the half-locked position, so that the gap between the door and the vehicle body is detected. This enables more accurate detection than indirectly detecting the half-locked state using a contact provided in the half-lock state. In addition, since only the first activation signal of the switching means is used to detect a half-lock, even if this switching means is turned on by the door opening operation, there will be no false detection of a half-lock. The reliability of power-assisted door locking devices is improved.

[Brief explanation of the drawing]

Figures 1 to 4 illustrate one embodiment of the present invention.
FIG. 1 is a circuit diagram of the control circuit, FIGS. 2(a) to (e) are diagrams illustrating the state of engagement between the latch plate and the striker,
FIG. 3 is a perspective view showing the motor and drive system, and FIG. 4 is a time chart illustrating the operation of the control circuit. FIGS. 5(a) and 5(b) are diagrams illustrating a conventional latch operation. 11: Latch plate 12 Striker 14: Drive lever 16: Oven lever 30: Vehicle body 40 Ni slide door 55: Drive gear ioo: Control circuit R1: Forward rotation relay R2: Reverse rotation relay MT: Motor SWI: Half lock detection switch SW2: Full Lock switch SW3: Neutral switch SW4: Conductive switch TI = timer

Claims (1)

[Claims] A latch member that rotates from an open position through a half-lock position to a full-lock position and is biased toward the open position is pivotally mounted on the door side, and is opposed to the latch member. A striker that operates the latch member to the full lock position by a closing operation is fixedly installed on the vehicle body side, and a deterrent member that stops the urging force of the latch member to the open position when the latch member is fully locked is provided on the door side, When the door is opened, the locking device for an automobile door is configured to release the engagement between the deterrent member and the latch member at the full lock position in conjunction with the door opening operation, and return the latch member to the open position. a drive means for driving the latch member in the half-lock position to the full-lock position; and actuated by at least the movement of the latch member from the open position to the half-lock position and the movement of the restraining member when the door is opened. half-lock detection means for detecting only the actuation signal obtained when the latch member rotates from the open position to the half-lock position among the actuation signals of the switching means; and detection from the half-lock detection means. In response to the signal
A locking device for an automobile door, comprising: drive control means for controlling the drive means so that the latch member is driven from a half-lock position to a full-lock position.