JPH083641Y2 - Automotive back door closure device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a striker fixed to one of a back door and a peripheral edge of a door opening, and a latch member for engaging and disengaging the striker to the other of the back door and a peripheral edge of the door opening. The present invention relates to a back door closure device for an automobile, in which the striker is pulled by power through the latch member to close the back door.

[0002]

2. Description of the Related Art As a conventional automobile back door closure device, for example, as disclosed in Japanese Patent Laid-Open No. 62-244988, a striker is fixedly mounted on the back door side and a striker is provided at the peripheral edge of the door opening. When the latch member is locked to the striker, the latch member is held in the engagement position by the locking plate, the drive motor pulls down the latch member, and the back door is closed via the striker. It has become. When the drive motor reverses, the latch member rises, the locking plate disengages from the latch member back and forth, and the latch member returns to the disengaged position and disengages from the striker due to the restoring force of the weather strip and the bumper rubber. There are things that can be opened.

[0003]

[0004]

However, in such a conventional back door closure device for an automobile,
When used for a backdoor with a gentle slope, water is badly drained, so water easily collects at the contact area between the backdoor and the weather strip.For example, in cold regions, the collected water freezes or freezes, and If a very large lift force is required to open the door, and if the back door is equipped with an air spoiler to increase the weight or if the gas stay becomes flat and the lift force is insufficient, a weather strip and With the restoring force of the bumper rubber, if the latch member does not return to the non-engaging position and the latch member remains in the engaging position, the drive motor operates again and the latch member retracts the striker, There was a problem that it was not easy to use.

The present invention has been made in view of such a conventional problem, and provides a convenient back door closure device for an automobile by forcibly returning the latch member to the non-engaging position. It is intended to be provided.

[0006]

The gist of achieving the above object is that a striker is fixed to one of the back door and the peripheral edge of the door opening, and the striker is fixed to the back door and the peripheral edge of the door opening. On the other hand, there is provided a latch member that engages and disengages with the striker, and the back door and the door are closed in the automobile back door closure device in which the striker is retracted by power through the latch member to close the back door. A support base fixedly provided on the other side of the peripheral edge of the opening, a latch base movably supported by the support base in an ascending position and a descending position, and an engaging position at which the latch base engages the striker. And the latch member pivotally attached to a non-engagement position that is disengaged from the striker, and a locking posture that constrains the latch member to the engagement position. , Is pivotally attached to the latch base so as to be swingable in an unlocking posture in which the latch member is kicked up to forcibly set to the disengaged position, and is biased by a spring member in a clockwise direction, that is, a swinging direction in the locking posture. And a locking plate on which a restraining claw for restraining the latch member at the engaging position is formed, and a raising projection for raising the latch member is formed, and the locking plate is attached to the support base,
A retracting mechanism that displaces the latch base between the raised position and the lowered position by power to pull the striker through the latch member, and a rotatably supported by the support base to engage the latch member. And a forcible unlocking member for rotating the locking plate in the unlocked posture by rotating the locking plate from the position restrained by the power supply.

[0007]

When the back door is closed and, for example, the latch member is engaged with the striker and the locking plate is moved from the unlocked posture to the locked posture and the latch member is restrained at the engagement position, the retracting mechanism operates. Then, for example, the latch base is displaced from the raised position to the lowered position, and the striker is retracted via the latch member. Thereby, the back door is completely closed. While the retracting mechanism is operating, the forced unlocking member also rotates, but does not rock the locking plate. Further, the weather strip gradually bends against the restoring force.

When the retracting mechanism operates when the back door is in the closed state, the latch base moves up from the lowered position. At this time, when the forcibly unlocking member also rotates and the latch base is at the raised position, the locking plate is in the unlocking posture, and the locking plate forcibly swings the latch member to the non-engaging position. As a result, even when the restoring force of the weather strip is not sufficient, the latch member returns to the non-engaging position, the striker is disengaged from the latch member, and the back door can be opened.

[0009]

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, a striker guide groove 21 is cut downward from the upper edge of the support base 20 at the center, and one end is unlocked by a key operation. The mechanism 25 is mounted, and the retraction mechanism 50 for the latch base 40 is mounted on the other end.

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 29, 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 at 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 provided 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 FIG. 1, FIG. 5, FIG. 6 and FIG. 8, 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 portion of the support base 20. A step pin 31 for
The step pin 31 is abutted against the motor base 30 and fixed by caulking. A drive motor 35 is mounted on the front side of the motor base 30, and the drive motor 35 is connected to the motor shaft 3
5a is extended laterally and is placed horizontally. A deceleration mechanism 36 is attached to the drive motor 35, and the drive motor 35
An output shaft 37, which is interlocked with the speed reduction mechanism 36, projects forward. A transmission pin 37a is planted at the tip of the output shaft 37.

A large circular insertion hole 32 through which the output shaft 37 is inserted is bored at the other end portions of the motor base 30 in both directions, and a disc 38 for detection is provided at 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 includes 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 a flange 43 outwardly.
a and 43b are extended.

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 a counterclockwise direction, that is, in a direction swinging to a non-engaged 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 engaging 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 the pivot 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 becomes 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 for detection is provided with 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. Once the latch member 60 is forcibly rotated to the non-engagement position, the restraining claw 73 of the locking plate 70 abuts on the jaw portion 65 of the latch member 60, and the restraining claw 73 cannot be further swung. Part 6
There is no hanging on 5.

Before and after, the arcuate 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.

[0034]

According to the closure device for a back door of a vehicle according to the present invention, the latch member is forcibly returned to the disengaged position by the forcibly unlocking member through the locking plate, and the door cannot be opened. I tried not to
For example, even when the restoring force of the weather strip is not sufficient, the latch member returns to the non-engaging position, the striker is disengaged from the latch member, and the back door is ready to open.
Again, the retracting mechanism does not retract the striker via the latch member, which improves usability.

[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 the closure device according to the embodiment of the present invention in a mounted state.

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

FIG. 4 is a perspective view of a closure device according to an embodiment of the present invention, seen from a diagonally rear side with a part cut away.

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 according to an embodiment of the present invention.

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

FIG. 8 is a perspective view of a latch base according to 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 (1)

[Scope of utility model registration request] 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 a back door for an automobile, wherein the striker is pulled in through the latch member to close the back door, a support base fixedly provided on the other of the back door and a peripheral portion of the door opening, A latch base that is displaceably supported by a support base in an ascending position and a descending position, and pivotally pivotally attached to the latch base between an engaging position that engages the striker and a non-engaging position that disengages from the striker. The latch member, and a locking posture for restraining the latch member in the engagement position,
Pivotally attached to the latch base so as to be swingable in an unlocked posture in which the latch member is kicked up to forcibly set to the disengaged position,
The spring member urges the member in the clockwise direction, that is, the direction in which it swings to the locked position, and the restraining claw for restraining the latch member at the engaging position is formed, and the raising projection for raising the latch member is formed. A locking plate that is attached to the support base, and the latch base is displaced to the raised position and the lowered position by power from a position where the latch member is constrained to the engagement position, and the striker is inserted through the latch member. A retractable mechanism for attracting the vehicle, and a forced unlocking member that is rotatably supported by the support base and that is rotated by power to swing the locking plate to the unlocked posture. Back door closure device.