JPH0819801B2 - Automotive back door closure device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a striker fixed to a back door and a latch member provided on the periphery of a door opening for engaging and disengaging the striker. The present invention relates to a vehicle back door closure device which retracts the striker to close the back door.

[0002]

2. Description of the Related Art As a conventional vehicle back door closure device, for example, as disclosed in JP-A-62-244988, a back door is closed and a latch member is engaged with a striker on the back door side. Then, the drive motor starts, the screw member extending vertically under the latch member rotates, the nut member is guided by the guide rail and moves downward, and the latch member attached to the nut member is released. Some descend, which causes the striker to be retracted and the back door closed.

The closure device is provided on the back door for the following reasons. That is, in a three-door hatchback of a sports car, it has been reported that wind pressure causes squeaking noises, air leaks, and flapping phenomena at the back door during high-speed running. The cause is that the seal reaction force of the batch back decreases. . Especially in North America, high-speed driving is common, and if it is a luxury car, the fluttering phenomenon is treated as a defect, and to prevent fluttering, even if the hatchback seal reaction force is set to a high value, it will decrease over time, so it is quite Must be high. As the seal reaction force is increased, the hatchback will not close easily. Therefore, a high-output closure device that forcibly closes the back door against the large seal reaction force is required.

When the trunk lock is provided at the peripheral edge of the door opening, the spare tire is stored in the shallow storage compartment of the trunk so that it can be taken out easily, and the narrow storage space formed in the lower rear wall of the trunk room. The back door lock is attached to the back door, and the closure device placed near the back door lock is installed in a space-constrained state, and it is desirable that the structure be able to effectively use the vacant space. Be done. Also, when the door lock is provided on the back door side, the rear end of the back door becomes bulky.

[0005]

However, in such a conventional closure device for a back door for an automobile, the screw member is configured to extend vertically in a narrow space immediately below the latch member. There are certain limits to the size of the drive motor,
It cannot be installed depending on the model. On the other hand, if a certain limit is set for the output and the seal reaction force is lowered in response to the output, there is a problem that a fluttering phenomenon occurs and the sense of quality is impaired.

The present invention has been made by paying attention to the above-mentioned conventional problems, and effectively utilizes the mounting space,
An object of the present invention is to provide a back door closure device for an automobile, which can have a high output and allows a striker to be drawn in according to a seal reaction force, thereby improving mountability.

[0007]

The gist of achieving the above object lies in the inventions of the following items. 1 A striker is fixed to one of the back door and the peripheral edge of the door opening, and the other of the back door and the peripheral edge of the door opening is provided with a latch member for engaging and disengaging the striker.
In a closure device for an automobile back door, which is adapted to close the back door by pulling the striker through the latch member by power, a support plate fixed to the other of the back door and the peripheral portion of the door opening. And a latch base to which the latch member is attached. The latch base is pivotally attached to the support base such that one end of the latch base is swingable, and the latch base is at a position separated from the one end to the other end. The latch member is provided, and the support base is provided on the other end side so as to interlock with power and swing the other end around the one end of the latch base. A closure device for an automobile back door, comprising a retracting mechanism for retracting a striker via the latch member. 2. The automobile back door closure device according to Item 2, wherein the latch member is disposed substantially in the center between the one end and the other end of the latch base. Door closure device. 3. The closure device for a back door for an automobile according to Item 1 or 2, wherein the retracting mechanism is a toggle mechanism, and an input link that is rotated by the drive motor and one end thereof on the other end side of the latch base. And an output link to which the parts are connected, and immediately before the striker is most retracted,
An input shaft to which the input link for inputting the power of the drive motor is pivotally connected, a connecting point between the input link and the output link, and an output point of the output link are aligned with each other to form a latch member. A backdoor closure device for an automobile, characterized in that the input link and the output link are arranged so that a moment of the latch base acting on is increased.

[0008]

When the back door is closed and, for example, the latch member is engaged with the striker, the retracting mechanism is actuated by the power, and the other end is pulled down around one end of the latch base. As a result, the latch member pulls the striker through the latch base, and the back door is fully closed. If there is an empty space on the other end side of the latch base, a retracting mechanism having a desired output is provided in that space, and that space is effectively used. On the other hand, if there is no empty space on the other end side of the latch base and there is an empty space on one end side, a retracting mechanism is provided in that space. Immediately before the striker is most retracted, the input shaft of the input link, the connecting point of the input link and the output link, and the output point of the output link are aligned, and the moment of the latch base acting on the latch member increases. The striker is pulled in strongly. When the striker is retracted, a latch member is provided at the center of one end and the other end of the latch base, so the retractor pulling down the other end of the latch base should disperse the striker's retraction force. Therefore, no great force is applied to the components of the retracting mechanism.
Further, even if the tolerance of the pulling amount when pulling down the other end of the latch base is doubled, the striker can be accurately pulled in with the half tolerance.

If there is an empty space on the other end side of the latch base, a retracting mechanism having a desired output is provided in that space, and the space is effectively used. On the other hand, if there is no empty space on the other end side of the latch base and there is an empty space on one end side, a retracting mechanism is provided in that space.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Each drawing shows an embodiment of the present invention. As shown in FIGS. 2 and 3, a striker 12 is fixedly provided at the center of the rear edge of the back door 10. A weather strip (not shown) is attached to the peripheral edge of the door opening 14, and a closure device 20a is attached to the peripheral edge portion 16 of the door opening 14 corresponding to the striker 12.

The closure device 20a includes a support base 20 fixed to the inner panel 17 of the peripheral edge portion 16 of the door opening 14, a motor base 30 disposed so as to overlap the support base 20 in the vehicle front-rear direction, and a support. A latch base 40 provided in a storage space 30a formed between the base 20 and the motor base 30 is provided.

As shown in FIGS. 1, 6 and 9, the support base 20 has a striker guide groove 21 at the center portion in the lateral direction.
Is cut downward from the upper edge portion, and an unlocking operation mechanism 25 by key operation is attached to one end portion in both sides. In this embodiment, there is an effective empty space on the other end side of the support base 20, and the latch base 4 is provided on the other end.
The retracting mechanism 50 for 0 is mounted.

The unlocking operation mechanism 25 has a bell crank member 26 pivotably attached to the support base 20, and a long hole 27 is formed at one end of the bell crank member 26. A connecting rod 27a is movably fitted to the connecting rod 27a, and the other end of the connecting rod 27a is connected to a link member 28 on the key cylinder side (not shown). Bell crank member 2
One end of a connecting rod 29 is rotatably connected to the other end of the connecting rod 6, and the other end of the connecting rod 29 extends to the center of the support base 20.

A protrusion 26a for detection is formed on the other end of the bell crank member 26, and a limit switch 3 for detecting the movement of the protrusion 26a for detection is formed on the motor base 30.
4 are provided.

The pull-in mechanism 50 is a toggle mechanism, and has a disc-shaped input link 51 and a pin member 5 on the periphery of the input link 51.
And an output link 52 connected by 1a. An output pin 53 is planted at the tip of the output link 52, and the output pin 53 is fitted in a guide groove 23 formed in the support base 20 so as to be vertically movable. A sliding member 53a is rotatably connected to the output pin 53, a guide flange 23a is formed on the peripheral edge of the guide groove 23, and the sliding member 53a is vertically guided on the guide flange 23a. It is fitted so that it can move. As shown in FIGS. 1, 4, 5, and 7 in which the tip of the output pin 53 is fixed to the other end of the latch base 40, a storage space 30a is formed in the peripheral edge of the support base 20. A stepped pin 31 for
The stepped pin 31 is abutted against the motor base 30 and fixed by caulking. A drive motor 35 is mounted on the front surface side of the motor base 30, and the drive motor 35 is horizontally placed with a motor shaft 35a extending in both directions. A deceleration mechanism 36 is attached to the drive motor 35, and an output shaft 37 that is interlocked with the drive motor 35 via the reduction mechanism 36 projects forward. The transmission pin 37 is provided at the tip of the output shaft 37.
a is planted.

A large circular insertion hole 32 through which the output shaft 37 is inserted is formed at the other end of the motor base 30 on both sides, and a disc 38 for detection is provided on the base end side of the output shaft 37. The input shaft 5 is fixed and is provided on the distal end side of the output shaft 37 via a relay member.
7 are connected. The input shaft 57 is fixed to the input link 51. The output shaft 3 is provided on the circumference of the disk 38 to be detected.
A large arc portion 38a having a large diameter and a small arc portion 38b having a small diameter are contiguously formed with the axis of 7 concentrically.

The relay member is a forced unlocking member 39. In the forced unlocking member 39, the unlocking arc portion 39a having the shaft center of the output shaft 37 as the concentric axis and the transmission pin 37a are fitted to each other so that the input shaft 57 can rotate integrally with the output shaft 37. The fitted flange 39b is formed.

The motor base 30 has a disk 3 to be detected.
A limit switch 33 for detecting the movement of 8 is attached. The harness 33a is extended from the limit switch 33, and similarly, the harness 33a is extended from the limit switch 34.
a is extended. The harnesses 33a and 34a have a clip 33b on the motor base 30 without any slack.
It is fixed at.

As shown in FIGS. 1 and 8, a latch base 40 is swingably supported at one end of the support base 20 by a pivot 41 between a raised position and a lowered position. An abutting protrusion 48 is formed on the other end of the latch base 40. Stopper flanges 29a and 29b are formed at the other end of the support base 20 so as to come into contact with the abutting protrusions 48 at the raised position and the lowered position, respectively. A damper member 29c is fitted on the stopper flanges 29a and 29b. A groove 42 for a striker is formed in a central portion of the latch base 40 in both lateral directions, and a holding bracket 43 for a damper is fixedly provided so as to cover the groove 42 for a striker from the rear side. At the center of the holding bracket 43, the housing portion 4
4, a fixed damper 45 and a movable damper 46 that is supported so as to be vertically movable are housed in the housing portion 44. The movable damper 46 is biased upward by a spring member 47. The holding bracket 43 has flanges 43a and 43b extending in both directions.

An escape hole 49 is provided at the other end of the latch base 40.
The input shaft 57 penetrates the escape hole 49 so as to be vertically movable relative to each other.

A latch member 60 is sandwiched between the flange 43a and the latch base 40, and is pivotally supported by a pivot 61 between an engaging position for engaging the striker 12 and a non-engaging position for disengaging from the striker 12. ing. A locking plate 70 is disposed on the opposite side of the latch member 60 with the striker groove 42 as the center.
Is pivotally supported by a pivot 71 in a locked posture in which the latch member 60 is restrained in the engaged position and in a unlocked posture in which the latch member 60 is lifted up and forcibly in the non-engaged position.

The latch member 60 is urged by a spring member 62 in the counterclockwise direction, that is, in the direction of swinging to the non-engaging position. The locking plate 70 is urged by a spring member 72 in a clockwise direction, that is, in a direction in which the locking plate 70 swings to a locked posture. A restraining claw 73 for restraining the latch member 60 at the engaging position is formed on the locking plate 70, and a raising projection 74 for raising the latch member 60 is provided.
Are formed. Lower end 7 of locking plate 70
A connecting rod 29 for unlocking is connected to 5.

The locking plate 70 has an abutted projection 7 which is abutted against the forced unlocking member 39 so as to swing in an unlocking posture.
6 extends laterally.

Next, the operation will be described.

As shown in FIG. 9, when the striker 12 on the back door 10 side is not inserted into the striker guide groove 21, the latch member 60 is in the non-engaging position and the locking plate 70 is in the jaw portion 65 of the latch member 60. It hits and is in an unlocking position. Further, the output pin 53 of the retracting mechanism 50 is at the top dead center, and the latch base 40 is at the raised position. Further, the projection 26a for detection of the unlocking operation mechanism 25 does not push the contact piece of the limit switch 34, but the large arc portion 38a of the disk 38 for detection pushes the contact piece of the limit switch 33. .

As shown in FIG. 10, as the back door 10 is closed, the striker 12 is guided by the striker guide groove 21 and moves downward to move the jaw 65 of the latch member 60.
Is pushed into the engagement position against the biasing force of the spring member 62.
Before and after, the locking plate 70 swings by the urging force of the spring member 72, and the restraining claw 73 hooks on the jaw portion 65 to restrain the latch member 60 at the engaging position. At this time, the protrusion 26a to be detected of the unlocking operation mechanism 25 pushes the contact piece of the limit switch 34, whereby it is detected that the locking plate 70 is in the locking posture.

When the contact piece of the limit switch 34 is pushed in and turned on, that is, when the locking plate 70 is in the locking posture, the drive motor 35 is started and the speed reduction mechanism 36-output shaft 37-forced disengagement, as shown in FIG. Lock member 39
The input shaft 57 rotates via the input shaft 51, and the input link 51 rotates counterclockwise against the reaction force of the weather strip and damper members 45 and 46 (not shown). As a result, the output pin 53 is lowered along the guide groove 23 via the output link 52, the sliding member 53a is guided and lowered by the guide flange 23a, and the other end of the latch base 40 is moved to the pivot 4
It goes down around 1. When the input link 51 further rotates counterclockwise, the output pin 53 reaches the bottom dead center, the other end of the latch base 40 lowers, the damper member 48 abuts the stopper flange 29b, and the latch base 40 moves to the lowered position. The locking plate 70 to the latch member 6
The striker 12 is pulled in through the back door 10
Will be fully closed. Since the contact piece of the limit switch 33 is not pushed by the small arc portion 38b of the disk 38 to be detected, the limit switch 33 is turned off and the drive motor 3
5 stops rotating.

When the striker 12 is retracted against the reaction force of a weather strip or the like (not shown), the reaction force of the weather strip or the like is divided into two by the pivot shaft 41 and the output pin 53 via the latch member 60 to the latch base 40. It will be like this. Therefore, the reaction force applied to the retracting mechanism 50 is halved, and it is not necessary to particularly increase the strength of the output link 52 and the input link 51. Further, the retracting force of the retracting mechanism 50 increases immediately before the output pin 53 reaches the bottom dead center, and the striker 12 can be retracted easily.

Since the distance between the pivot shaft 41 and the output pin 53 is about twice the distance between the pivot shaft 41 and the latch member 60, about half of the descending amount of the output pin 53 is the retracting amount of the striker 12, Even if the tolerance of the retracted amount of the output pin 53 is doubled, the striker 12 can be retracted with desired accuracy.

Further, when the striker 12 is retracted, one end of the connecting rod 29 rotates about the pivot 41 so that the bell crank member 26 does not swing and the projection 26a to be detected has the limit switch 34. Keep the contact piece pushed in. Further, at this time, the forced unlocking member 39 also rotates integrally with the input link 51, but the forced unlocking member 3
Since 9 does not hit the contacted projection 76 of the locking plate 70, the locking plate 70 remains in the unlocked position to the locked position.

In FIG. 11, when the link member 28 is rotated counterclockwise by a key operation, as shown in FIG. 12, the connecting rod 27a causes the bail crank member 26 to swing counterclockwise and the connecting rod 29a. The lower end 75 of the locking plate 70 is pulled via the locking plate 70, and the locking plate 70 swings clockwise around the pivot 71 to change from the locked position to the unlocked position. Thereby, the latch member 60
Can swing to the disengaged position. Further, the swing of the bail crank member 26 prevents the protrusion 26a for detection from pushing the contact piece of the limit switch 34, the limit switch 34 is turned off, the drive motor 35 is started, and the input link 51 rotates, the output pin 53 pushes up the other end of the latch base 40 via the output link 52, the latch base 40 swings counterclockwise about the pivot 41, and the rising position shown in FIG. become.

Similarly, in FIG. 11, when an operation button (not shown) is pressed to open the back door 10, the drive motor 35 is started and the forced unlocking member 39 is rotated to unlock the forced unlocking member 39. The arcuate portion 39a for contacting the pushed projection 76 of the locking plate 70 pushes it down. As a result, the locking plate 70 swings clockwise around the pivot 71, and the kicking projection 74 of the locking plate 70 kicks up the jaw portion 65 of the latch member 60. When the jaw portion 65 is kicked up, the latch member 60 moves toward the pivot 61.
13, the latch member 60 swings to the non-engagement position as shown in FIG. 13, as the striker 12 rises. At this time, the input link 51 to the output link 52 to the output pin 5
The other end of the latch base 40 is lifted via 3
The latch base 40 swings counterclockwise around the pivot 41 and rises from the lowered position.

When the drive motor 35 further rotates, the output pin 53 reaches the top dead center, the latch member 60 moves to the disengaged position, and the latch base 40 moves to the raised position, as shown in FIG. Before and after, the circular arc portion 39a for unlocking the forced unlocking member 39 pushes the contact piece of the limit switch 33, the limit switch 33 is turned on, and the drive motor 35 stops rotating. In the state of FIG. 14, the back door 10 can be manually lifted and opened.

In the above embodiment, the retracting mechanism 50 and the drive motor 30 are provided by utilizing the effective empty space on the other end side of the support base 20, but there is no empty space on the other end side and If there is an empty space near the part side, for example, extend one end side to the empty space side,
A retracting mechanism 50 for swinging the extended portion may be provided in the empty space on the one end side.

The closure device 20a according to the above embodiment
Since the striker guide groove 21 is formed in the support base 20 fixed to the vehicle body, the closure device 20a
However, even if the latch member 60 has an arcuate swing locus about the pivot 41, the difference between the loci of the latch member 60 and the striker 12 is as follows. When the striker 12 slides with respect to the latch member 60 when entering the striker guide groove 21, the striker 12 is absorbed and is not malfunctioned. Further, for example, the structure is simple and the cost can be reduced as compared with the case where the striker guide means is provided on the latch base 40 on the moving side.

[0036]

According to the closure device for a back door for an automobile of the present invention, the other end of the latch base is swung about one end in both vehicle body directions, and the other end is separated from the other end. Since the striker is pulled in via the latch member provided at the position to close the back door, if there is an empty space on the other end side of the latch base, the striker resists a large seal reaction force in that space. A high-power retracting mechanism that pulls in the space is used effectively, while if there is no empty space on the other end of the latch base and there is an empty space on one end, the retracting mechanism is in that space. Can be provided, the output thereof can be set according to the seal reaction force, and the mountability can be improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a closure device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a mounted state of the closure device according to the embodiment of the present invention.

FIG. 3 is a side view of a mounted state of the closure device according to the embodiment of the present invention.

FIG. 4 is a perspective view of a closure device according to an embodiment of the present invention, which is partially cut away and viewed obliquely from the rear.

FIG. 5 is a perspective view of a closure device according to an embodiment of the present invention.

FIG. 6 is a perspective view of a support base showing an embodiment of the present invention.

FIG. 7 is a perspective view of a motor base showing an embodiment of the present invention.

FIG. 8 is a perspective view of a latch base showing an embodiment of the present invention.

FIG. 9 is an operation explanatory view of the closure device according to the embodiment of the present invention.

FIG. 10 is an operation explanatory view of the closure device according to the embodiment of the present invention.

FIG. 11 is an operation explanatory view of the closure device according to the embodiment of the present invention.

FIG. 12 is an operation explanatory view of the closure device according to the embodiment of the present invention.

FIG. 13 is an operation explanatory view of the closure device according to the embodiment of the present invention.

FIG. 14 is an operation explanatory view of the closure device according to the embodiment of the present invention.

[Explanation of symbols]

 10 ... Backdoor 12 ... Striker 20a ... Closure device 20 ... Support base 30 ... Motor base 35 ... Drive motor 35a ... Motor shaft 40 ... Latch base 50 ... Retraction mechanism 51 ... Input link 52 ... Output link 60 ... Latch member 70 ... Locking plate

Claims (3)

[Claims] 1. A striker is fixed to one of the back door and the peripheral edge of the door opening, and a latch member for engaging and disengaging the striker is provided to the other of the back door and the peripheral edge of the door opening. A closure device for an automobile back door, wherein the striker is pulled in via the latch member to close the back door, wherein a support base fixed to the other of the back door and the peripheral edge of the door opening. And a latch base to which the latch member is attached, the latch base having one end pivotally attached to the support base so as to be swingable, and the latch base at a position spaced from the one end toward the other end. A member is provided, the support base is interlocked with power, and one end of the latch base is centered to swing the other end,
A closure device for an automobile back door, comprising a retracting mechanism for retracting a striker through the latch member arranged on the other end side. 2. The closure device for a back door for an automobile according to claim 1, wherein the latch member is disposed substantially at the center between the one end and the other end of the latch base. A back door closure device for automobiles. 3. The closure device for an automobile back door according to claim 1, wherein the retracting mechanism is a toggle mechanism, the input link being rotated by the drive motor, and the other end of the latch base. And an output link whose one end is connected to the section side,
Immediately before retracting the striker most, an input shaft to which the input link for inputting the power of the drive motor is pivotally attached,
The connection point between the input link and the output link and the output point of the output link are aligned with each other so that the moment of the latch base acting on the latch member increases.
A closure device for an automobile back door, characterized in that the input link and the output link are arranged.