JP4295992B2 - Door automatic closing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic closing device for automatically closing a door in an automobile or the like.
[0002]
[Prior art]
Generally, this type of automatic closing device includes a latch that sequentially moves to a fully open position, a half latch position, and a full latch position in response to the closing movement of the door, and a pole that can lock the latch to the half latch position and the full latch position. The driving mechanism (driving means) can move the latch from the half latch position to the full latch position, and a controller (control means) for controlling the driving mechanism. The controller is connected to a plurality of switches that switch according to the operating positions of the latch and the pole, and controls the drive mechanism based on the switch operations. The door is automatically closed by the drive mechanism moving the latch from the half latch position to the full latch position.
[0003]
Conventionally, as this kind of automatic closing device, what was indicated in patent documents 1 and patent documents 2, for example is known.
[0004]
The device described in Patent Document 1 includes a latch switch and a pole switch as switches connected to the controller. The latch switch switches from on to off when the latch moves from the fully open position to the half latch position, and returns from off to on when the latch moves from the half latch position to the full latch position. The pole switch that is switched by the operation of the pole is switched from OFF to ON in the process in which the latch moves to the half latch position, and when the pole locks the latch in the half latch position, the pole switch returns from ON to OFF, and then latches. Is switched from off to on again in the process of moving to the full latch position and then back off when the pole locks the latch in the full latch position. The controller moves from the fully open position to the half latch position and the latch switch switches from on to off, then the pole locks the latch in the half latch position and the pole switch returns from on to off. Then, the drive mechanism is driven to move the latch to the full latch position.
[0005]
On the other hand, the device described in Patent Document 2 includes a half switch that switches from on to off when the latch moves from the fully open position to a position slightly before the half latch position. When the half switch is turned off, the controller drives the drive mechanism to move the latch to the full latch position.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-291737
[Patent Document 2]
Japanese Patent Laid-Open No. 2002-21400
[Problems to be solved by the invention]
However, in the apparatus described in Patent Document 1, for example, due to a secular change of the door seal, the closing speed in the vicinity of the fully closed position of the door is increased, and the latch is between the half latch position and the full latch position. If it stops, the drive mechanism may not be driven. That is, since the drive timing of the drive mechanism is the time when the pole switch returns to OFF after the latch switch is switched OFF, the time for recognizing the drive timing, that is, the pole after the latch switch is switched OFF. The time until the switch returns to OFF becomes shorter as the door closing speed becomes faster, and depending on the processing speed of the controller, there is a possibility that such driving timing cannot be recognized. Therefore, it is necessary to use a controller with high processing capability and a high-precision switch.
[0009]
In the device described in Patent Document 2, the half switch is turned off when the latch moves from the fully open position to a position slightly before the half latch position. If the door is bounced back in the opening direction before moving from the fully open position to the half latch position, the half switch that was once switched off will immediately turn back on and the control of the drive mechanism may become unstable. . In addition, in order to stably control the drive mechanism in consideration of such a case, the control items of the controller increase, and the software becomes more complicated.
[0010]
SUMMARY OF THE INVENTION An object of the present invention is to provide a highly reliable automatic door closing device capable of reliably starting a driving means and rotating a latch to a full latch position when the latch exceeds a half latch position from a fully open position. There is to do.
[0011]
[Means for Solving the Problems]
The door automatic closing device according to claim 1 is a latch that sequentially moves to a fully open position, a half latch position, and a full latch position in accordance with the closing movement of the door, and the latch is moved to the half latch position and the full latch position. A pawl that can be locked to the half latch position, a drive means that can move the latch from the half latch position to the full latch position, and a first switch state when the pawl locks the latch to the half latch position. a first switch switched to the second switch state, switched in accordance with the movement position of the latch, there is when the latch is moved in the direction of the full latch position from the half-latched position, and said first switch Is switched to the second switch state when the second switch state is switched to the second switch state. If, when one of the first switch and the second switch is a second switch state, characterized by comprising a control means for activating the drive means.
[0012]
A door automatic closing device according to a second aspect of the present invention is the door automatic closing device according to the first aspect of the present invention, wherein the automatic switching device is switched according to the movement position of the latch, and after the latch has passed the half-latch position, A third switch that switches from a first switch state to a second switch state when moved from a position toward the full latch position , the first switch after the latch has passed the half-latch position. The first switch also when the pole locks the latch in the full latch position after switching from the second switch state to the first switch state while moving in the direction of the full latch position. The control means switches from the state to the second switch state, and the control means sets both the first switch and the third switch to the second switch state. And wherein the stopping the drive means when.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. This example is an application example as a device for automatically closing a door of an automobile.
[0015]
In FIG. 1, reference numeral 1 denotes a latch that can rotate in the directions of arrows A1 and A2 about an axis O1, and is provided with an entry groove 1A into which the striker 2 enters, a first claw portion 1B, and a second claw portion 1C. . Latch 1 is biased by the spring (not shown) depending on the direction of the arrow A2, when the door is open is in the rotational position of FIG. 1 (a), the striker 2 with the closing of the door entry By entering the groove 1A, it rotates in the direction of the arrow A1 as shown in FIG. 1 (b) to FIG. 1 (f). Reference numeral 3 denotes a pole that can rotate in the directions of arrows B1 and B2 about the axis O2, and a locking portion 3A is provided at a position facing the latch 1. The locking portion 3A engages with the claw portions 1B and 1C of the latch 1 to lock the latch at the half latch position and the full latch position. Paul 3 is biased by the spring (not shown) depending on the direction of arrow B2, when the door is open as shown in FIG. 1 (a), in pressure contact with the outer peripheral surface of the latch 1 facing.
[0016]
The latch 1 is switch operating member 4 is mounted, depending on the rotational position of the latch 1, a half switch (second switch) of the switch operating member 4 is position SW 2 and full switch (third switch) SW3 Are switched as described later. Further, a switch operating member 5 is attached to the pole 3, and the switch state of the start switch (first switch) SW1 in which the switch operating member 5 is in a fixed position according to the rotation position of the pole 3 will be described later. Switch.
[0017]
The switches SW1, SW2 and SW3 are connected to a controller (control means) 6 as shown in FIG. In FIG. 2 , 7 is a power source, 8 is a motor, and SW4 is a neutral switch. The motor 8 constitutes a driving mechanism (driving means) for rotating the latch 1, and the driving force of the motor 8 is transmitted to the latch 1 through a lever, a link, or the like. The drive mechanism of this example is configured to rotate the latch 1 in the direction of arrow A1 or A2 according to the rotation direction of the motor 8, and operates as a door closure by rotating the latch 1 in the direction of arrow A1. The latch 1 operates as a door opener by rotating it in the arrow A2 direction. As will be described later, the neutral switch SW4 is turned on when the drive mechanism is in a neutral state. The switches SW1, SW2, SW3, SW4 in this example are all normally closed switches. The controller 6 controls the motor 8 based on the switch states of these switches SW1, SW2, SW3, and SW4.
[0018]
Next, the operation will be described.
When the door is opened, the striker 2 is located outside the entry groove 1A, and the latch 1 and the pole 3 are in the rotational position shown in FIG. At this time, all of the switches SW1, SW2, and SW3 remain off (first switch state). As the door is closed, the striker 2 enters the entry groove 1A from the direction of the arrow in FIG. 1A, whereby the latch 1 rotates in the direction of the arrow A1.
[0019]
First, when the latch 1 is rotated to the position shown in FIG. 1B, the locking portion 3A of the pole 3 is engaged with the first claw portion 1B of the latch 1, and the latch 1 is moved as shown in FIG. It locks in such a half latch position. At this time, the switch SW1 is turned on (second switch state). From this half latch position, the latch 1 is rotated in the direction of the arrow A1 by a strong closing operation force of the door 1 or a driving force of the motor 8 in the driving mechanism as will be described later.
[0020]
When the latch 1 is rotated to the position shown in FIG. 1C, the switch SW2 is turned on (second switch state). When the latch 1 is turned to the position shown in FIG. Returns to off (first switch state). Thereafter, when the latch 1 is rotated to the position of FIG. 1E, the switch SW3 is turned on (second switch state). When the latch 1 is rotated to the position shown in FIG. 1 (f), the locking portion 3A of the pole 3 is engaged with the second claw portion 1C of the latch 1, and the latch 1 is moved as shown in FIG. It locks in such a full latch position. At this time, the switch SW1 is turned on again (second switch state).
[0021]
Such switch states of the switches SW1, SW2, and SW3 according to the rotation position of the latch 1 can be expressed as shown in FIGS. 3 and 4, (1) is the rotation position of the latch 1 between FIG. 1 (a) and FIG. 1 (b), and (2) is from FIG. 1 (b) to FIG. 1 (c). Rotation position of the latch 1 in between, (3) is the rotation position of the latch 1 between FIG. 1 (c) and FIG. 1 (d), and (4) is in FIG. 1 (d) to FIG. 1 (e). Rotation position of the latch 1 during the period until (5) is the rotation position of the latch 1 between FIG. 1 (e) and FIG. 1 (f), and (6) is the direction of the arrow A1 from FIG. 1 (f). This is the rotation position of the latch 1. In FIG. 4, L is an off state (first switch state), and H is an on state (second switch state). As is apparent from FIG. 4, when the latch 1 is in the rotation position between the half latch position and the full latch position, that is, within the rotation range from position (2) to (5), the switch At least one of SW1 and SW2 is turned on (H).
[0022]
When at least one of the switches SW1 and SW2 is on (H), the controller 6 recognizes that the latch 1 is in a rotational position between the half latch position and the full latch position, and turns on the motor 8 of the drive mechanism. The latch 1 is rotated in the direction of arrow A1. When the latch 1 is at the position {circle around (1)} before the half-latch position, both the switches SW1 and SW2 are off (L), so that the latch 1 is positioned at the position {circle around (2)} in distinction from the position {circle around (1)}. To {circle over (5)} can be reliably recognized. Therefore, when the latch 1 rotates in the arrow A1 direction and exceeds the half latch position, the latch 1 can be reliably rotated in the arrow A1 direction by the drive mechanism.
[0023]
When the latch 1 reaches the position (6) beyond the full latch position, the controller 6 waits for the start switch SW1 to be turned on (H), stops the motor 8, and then moves the motor 8 slightly in the other direction. To reverse to return the drive mechanism to the neutral state. The neutral state of the drive mechanism is detected when the neutral switch SW4 is turned on.
[0024]
FIG. 5 is a flowchart for explaining a more specific operation of the controller 6.
[0025]
When both the start switch SW1 and the half switch SW2 are off, the controller 6 determines that the latch 1 is at the position {circle around (1)} in steps S1 and S2, and waits for the door closing operation. When the start switch SW1 is on and the half switch SW2 is off, it is determined in steps S1 and S3 that the latch 1 is in the position (2), and the process proceeds to step S5. When the start switch SW1 and the half switch SW2 are on and the full switch SW3 is off, it is determined in steps S1, S3, and S4 that the latch 1 is at the position (3), and the process proceeds to step S5. When the start switch SW1 is off and the half switch SW2 is on, it is determined in steps S1 and S2 that the latch 1 is at the position (4) or (5), and the process proceeds to step S5. When all of the start switch SW1, half switch SW2, and full switch SW3 are on, it is determined in steps S1, S3, and S4 that the latch 1 is at the position (6), and the process is terminated.
[0026]
Accordingly, when the latch 1 is within the rotation range from position (2) to (5), the process proceeds to step S5. In step S5, the motor 8 is rotated in one direction to move the latch 1 in the direction of arrow A1. Turn to. Then, when both the full switch SW3 and the start switch SW1 are turned on within a predetermined time when the pull-in timer (not shown) times up, it is determined that the latch 1 has reached the position (6) by steps S6, S7, and S8. Then, the motor 8 is stopped (step S9). If it cannot be determined that the latch 1 has reached the position {circle around (6)} before the pull-in timer expires, the motor 8 is stopped (step S9).
[0027]
Thereafter, the motor 8 is reversed in the other direction (step S10), and the motor 8 is stopped after the neutral switch SW4 is turned on (steps S11 and S12).
[0028]
(Other embodiments)
The present invention can be widely applied as an automatic closing device for various doors in addition to automobile back doors and side doors. The automatic closing device of the present invention can also be configured as a door closure or a door lock device incorporating the door closure.
[0029]
【The invention's effect】
As described above, according to the present invention, the following effects can be obtained.
[0030]
That is, the automatic door closing device according to the first aspect of the present invention includes a first switch that switches a switch state when the pawl locks the latch in the half-latch position, and the latch is moved from the half-latch position to the full-latch position. And the second switch that switches from the first switch state to the second switch state when the first switch remains switched to the second switch state. By activating the driving means when the switch state of either one of the switches is changed, when the latch exceeds the half-latch position from the fully open position, the driving means is reliably activated to rotate the latch to the full latch position. Can be moved. In addition, the start timing of the driving means can be accurately determined by simple signal processing, and the reliability of the apparatus can be improved without using a controller with high processing capability and a high-precision switch.
[0031]
In the door automatic closing device according to the second aspect of the present invention, the switch state is switched when the latch moves from the position before the full latch position toward the full latch position after passing the half latch position. 3 Ru using a switch.
[0032]
The door automatic closing device according to the second aspect of the present invention uses, as the first switch, a switch whose switch state is switched even when the pole locks the latch at the full latch position. By stopping the driving means when the switch states of the third switch and the third switch are both switched, the driving means can be surely stopped when the latch is rotated to the full latch position.
[Brief description of the drawings]
FIGS. 1A to 1F are operation explanatory views of main parts according to an embodiment of the present invention.
FIG. 2 is a block diagram for explaining a controller in the first embodiment of the present invention.
FIG. 3 is a timing chart for explaining a switch switching state in the operation stage of FIGS.
FIG. 4 is an explanatory diagram of a switch switching state in the operation stage of FIGS. 1 (a) to (f).
FIG. 5 is a flowchart for explaining a control procedure of the controller of FIG. 2;
[Explanation of symbols]
1 Latch 2 Striker 3 Pole 6 Controller (Control means)
8 Motor SW1 Start switch (first switch)
SW2 half switch (second switch)
SW3 Full switch (3rd switch)
SW4 Neutral switch

Claims (2)

A latch that sequentially moves to a fully open position, a half latch position, and a full latch position in accordance with the closing movement of the door;
A pole capable of locking the latch at the half latch position and the full latch position;
Drive means capable of moving the latch from the half latch position to the full latch position;
A first switch that switches from a first switch state to a second switch state when the pole locks the latch in the half-latch position;
Switching according to the movement position of the latch, when the latch moves from the half latch position toward the full latch position, and when the first switch remains switched to the second switch state. A second switch for switching from the first switch state to the second switch state;
Control means for activating the driving means when any one of the first switch and the second switch is in a second switch state;
A door automatic closing device characterized by comprising: When the latch is moved in the direction of the full latch position from the position before the full latch position after the half latch position is passed, the second switch state is changed to the second switch state. A third switch that switches to the switch state of
The first switch is switched from the second switch state to the first switch state while the latch moves in the direction of the full latch position after passing the half latch position, and then the pole is moved to the first switch state. When the latch is locked at the full latch position, the first switch state is switched to the second switch state,
It said control means is self-closing device of a door according to claim 1, wherein said driving means can be stopped when the first switch and the third switch are all become the second switch state.

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