JPH04302684A - Closure device of back door for automobile - Google Patents

Abstract

PURPOSE:To improve a mountability by utilizing effectively a mounting space. CONSTITUTION:One end of a latch base 40 in the lateral direction of a car body is pivoted around the other end side pivot 41 to draw in a striker 12 through a latch member 60 provided in the central section in the lateral direction of the car body to close a back door 10. Thus, when an empty space is present in the other end side of the latch base 40, the empty space is effectively utilized to receive a high output pulling-in mechanism 50, so that the striker 12 can be pulled in according to the reaction of a seal.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] In the present invention, a striker is fixed to a back door, and a latch member is provided at the peripheral edge of the door opening to engage and disengage the striker. The present invention relates to a closing device for an automobile back door, which closes the back door by retracting the striker.

0002

2. Description of the Related Art In a conventional automobile back door closure device, for example, as disclosed in Japanese Unexamined Patent Publication No. 62-244988, a latch member is engaged with a striker on the back door side when the back door is closed. When this happens, the drive motor starts and the screw member extending vertically beneath 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 rotates. Some lower, thereby retracting the striker and closing the back door.

[0003] The reason why the back door is provided with a closure device is as follows. In other words, there have been reports of squeaks, wind leakage, and flapping phenomena occurring in the back door of 3-door hatchback sports cars due to wind pressure during high-speed driving, and the cause of this is attributed to a decrease in the reaction force of the batch back seal. . Particularly in North America, high-speed driving is common, and if it is a luxury car, the flapping phenomenon is treated as a defect, and even if the hatchback seal reaction force is set to a high value to prevent flapping, it will decrease considerably over time. need to be higher. By increasing the seal reaction force, the hatchback becomes less difficult to close. Therefore, a high-output closure device that forcibly closes the back door against a large seal reaction force is required.

[0004] When the trunk lock is installed at the periphery of the door opening, the spare tire is stored in a shallow storage recess in the trunk for easy removal, and the spare tire is stored in a narrow storage space formed on the low rear wall of the trunk. A back door lock is attached to the back door lock, and the closure device placed near the back door lock is installed in a space-constrained manner, so it is desirable to have a configuration that allows the empty space to be used effectively. It will be done. Further, when the door lock is provided on the back door side, the rear end of the back door becomes bulky.

[0005]

[Problems to be Solved by the Invention] However, in such conventional automobile back door closure devices,
The screw member is configured to extend vertically in a narrow space directly below the latch member, and there are certain limits to increasing the size of the screw member and drive motor, and depending on the vehicle model, it may not be possible to install it. On the other hand, if a certain limit is placed on the output and the seal reaction force is lowered in response to the output, there is a problem in that a flapping phenomenon occurs and the sense of luxury is impaired.

[0006] The present invention has been made by focusing on such conventional problems, and effectively utilizes the mounting space.
It is an object of the present invention to provide a closure device for a back door for an automobile, which can have a high output, can retract a striker according to seal reaction force, and can improve mounting ease.

[0007]

[Means for Solving the Problems] The gist of achieving this object is that a striker is fixedly installed on one side of the back door and the periphery of the door opening, and that the back door and the periphery of the door opening A closing device for an automobile back door is provided with a latch member that engages and disengages the striker on the other side, and the back door is closed by drawing the striker through the latch member using power. a support base fixed to the other side of the peripheral edge of the door opening, one end of which is pivotably pivoted to the support base, and the latch member is mounted at a position spaced apart from the one end toward the other end; a latch base, the support base is coupled to power, and the other end of the latch base is pivoted downward with one end thereof as the center, and the striker is retracted through the latch member. The present invention relates to a closing device for a back door for an automobile, which is characterized by being provided with a mechanism.

[0008]

[Operation] When the back door is closed and, for example, the latch member engages with the striker, the retraction mechanism is actuated by the power, and the other end is pulled down, centering on one end of the latch base. As a result, the latch member retracts the striker via 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 to make effective use of that space. On the other hand, if there is no empty space on the other end side of the latch base and there is empty space on one end side, the retracting mechanism is provided in that space.

0010

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

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

As shown in FIGS. 1, 6 and 9, the support base 20 has a striker guide groove 21 in the center on both sides.
is cut downward from the upper edge, and a key-operated unlocking mechanism 25 is attached to one end on both sides. In this embodiment, there is an effective empty space at the other end of the support base 20, and the latch base 4 is located at the other end.
A retraction mechanism 50 for 0 is attached.

The unlocking operation mechanism 25 has a bell crank member 26 that is pivotably mounted on the support base 20, and a long hole 27 is bored in one end of the bell crank member 26. A connecting rod 27a is movably fitted into the key cylinder, 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 at the other end of the bell crank member 26, and a limit switch 3 is provided on the motor base 30 for detecting the movement of the protrusion 26a for detection.
4 are provided.

The retraction mechanism 50 is a toggle mechanism, and includes a disc-shaped input link 51 and a pin member 5 on the peripheral edge of the input link 51.
It has an output link 52 connected at 1a. An output pin 53 is implanted at the tip of the output link 52, and the output pin 53 fits into 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 guiding flange 23a is formed on the periphery of the guide groove 23, and the sliding member 53a is vertically guided on the guiding flange 23a. It is movably fitted. 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 at the peripheral edge of the support base 20. A stepped pin 31 is installed for
A stepped pin 31 abuts against the motor base 30 and is fixed by caulking. A drive motor 35 is mounted on the front side of the motor base 30, and the drive motor 35 is placed horizontally 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 interlocks with the drive motor 35 via the deceleration mechanism 36 projects forward. A transmission pin 37 is attached to the tip of the output shaft 37.
A is planted.

A large circular insertion hole 32 through which an output shaft 37 is inserted is formed at the other end of the motor base 30 in the lateral direction, and a disc 38 for detection is provided at the base end of the output shaft 37. The input shaft 57 is fixedly installed, and the input shaft 57 is connected to the distal end side of the output shaft 37 via a relay member.
are connected. An input shaft 57 is fixed to the input link 51. An output shaft 37 is attached to the circumference of the disc 38 for detection.
A large circular arc portion 38a with a large diameter and a small circular arc portion 38b with a small diameter are continuously formed with the axis thereof being concentric.

The relay member is a forced unlocking member 39. The forced unlocking member 39 has an unlocking circular arc portion 39a that is concentric with the axis of the output shaft 37, and the transmission pin 37a is fitted so that the input shaft 57 can rotate integrally with the output shaft 37. A fitting flange 39b is formed.

The motor base 30 has a disk 3 for detection.
A limit switch 33 is installed to detect the movement of 8. A harness 33a extends from the limit switch 33, and a harness 34 extends from the limit switch 34.
a is extended. The harnesses 33a and 34a are clipped to the motor base 30 without causing any slack.
is fixed.

As shown in FIGS. 1 and 8, a latch base 40 is supported at one end of the support base 20 by a pivot 41 so as to be swingable between a raised position and a lowered position. A contact projection 48 is formed at the other end of the latch base 40. Stopper flanges 29a and 29b are formed at the other end of the support base 20 to abut the abutment protrusion 48 in the raised position and the lowered position, respectively. A damper member 29c is fitted to the stopper flanges 29a, 29b. A striker groove 42 is formed in the center of both sides of the latch base 40, and a damper holding bracket 43 is fixedly installed so as to cover the striker groove 42 from behind. At the center of the holding bracket 43 is a housing section 4.
4 is formed, and the housing portion 44 houses a fixed damper 45 and a movable damper 46 that is supported so as to be movable up and down. The movable damper 46 is urged upward by a spring member 47. The holding bracket 43 has flanges 4 on both sides.
3a and 43b are extended.

An escape hole 49 is provided at the other end of the latch base 40.
is drilled therein, and an input shaft 57 passes through the relief hole 49 so as to be relatively movable up and down.

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 engaged position in which it engages with the striker 12 and a non-engaged position in which it disengages 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 in the center.
is pivotally supported by a pivot 71 between a locked position in which the latch member 60 is restrained in the engaged position and an unlocked position in which the latch member 60 is kicked up and forcibly placed in the non-engaged position.

The latch member 60 is biased by a spring member 62 in a counterclockwise direction, that is, in a direction in which it swings to a non-engaged position. The locking plate 70 is biased by a spring member 72 in a clockwise direction, that is, in a direction to swing toward the locked position. The locking plate 70 is formed with a restraining pawl 73 for restraining the latch member 60 in the engagement position, and a kick-up protrusion 74 for kicking up the latch member 60. Lower end 75 of locking plate 70
A connecting rod 29 for unlocking is connected to.

The locking plate 70 has a protrusion 7 to be abutted against the forced unlocking member 39 in order to swing to the unlocked position.
6 extends laterally.

Next, the operation will be explained.

As shown in FIG. 9, when the striker 12 on the side of the back door 10 is not inserted into the striker guide groove 21, the latch member 60 is in the non-engaging position, and the locking plate 70 engages the jaw portion 65 of the latch member 60. It is in the unlocked position. Further, the output pin 53 of the retraction mechanism 50 is at the top dead center, and the latch base 40 is at the raised position. Further, although the detected protrusion 26a of the unlocking operation mechanism 25 does not push in the contact piece of the limit switch 34, the large circular arc portion 38a of the detected disc 38 pushes in 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, causing the jaw portion 65 of the latch member 60 to move downward.
is pushed into the engagement position against the biasing force of the spring member 62. Back and forth, the locking plate 70 swings due to the biasing force of the spring member 72, and the restraining claw 73 engages the jaw portion 65 to restrain the latch member 60 in the engagement position. At this time, the detected protrusion 26a of the unlocking operation mechanism 25 pushes the contact piece of the limit switch 34, thereby detecting that the locking plate 70 is in the locked position.

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 locked position, the drive motor 35 is started and the deceleration mechanism 36 to output shaft 37 are forced to release, as shown in FIG. Lock member 39
, the input shaft 57 rotates, 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 by the guide flange 23a and lowered, and the other end of the latch base 40 is
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. , locking plate 70 ~ latch member 6
The striker 12 is retracted through the back door 10
is fully closed. Since the contact piece of the limit switch 33 is not pushed in by the small arc portion 38b of the disc 38 for detection, 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 parts by the latch member 60 to the latch base 40 to the pivot shaft 41 and the output pin 53. It will take a while. Therefore, the reaction force applied to the retraction mechanism 50 is halved, and there is no need to particularly increase the strength of the output link 52 and input link 51. Further, just before the output pin 53 reaches the bottom dead center, the retracting force of the retracting mechanism 50 increases, and the striker 12 can be easily retracted.

Furthermore, since the distance between the pivot shaft 41 and the output pin 53 is approximately twice the distance between the pivot shaft 41 and the latch member 60, approximately half of the amount by which the output pin 53 descends is the amount by which the striker 12 is retracted. Even if the tolerance for the amount of retraction of the output pin 53 is doubled, the striker 12 can be retracted with desired accuracy.

Furthermore, when the striker 12 is retracted, one end of the connecting rod 29 rotates concentrically about the pivot 41, so the bell crank member 26 does not swing, and the protrusion 26a for detection is connected to the limit switch 34. Keep the contact piece pressed in. Furthermore, at this time, the forced unlocking member 39 also rotates integrally with the input link 51;
9 does not come into contact with the abutted protrusion 76 of the locking plate 70, the locking plate 70 remains in the locked position from the unlocked position.

In FIG. 11, when the link member 28 is rotated counterclockwise by key operation, the bell crank member 26 is swung counterclockwise by the connecting rod 27a, as shown in FIG. The lower end 75 of the locking plate 70 is pulled through the locking plate 70, and the locking plate 70 swings clockwise about the pivot 71 from the locked position to the unlocked position. Thereby, the latch member 60
can swing to the disengaged position. Further, as the bell crank member 26 swings, the detection target protrusion 26a will not push the contact piece of the limit switch 34, the limit switch 34 will be turned off, the drive motor 35 will start, 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, and the latch base 40 swings counterclockwise about the pivot 41 to the raised position shown in FIG. become.

Similarly, in FIG. 11, when an operation button (not shown) is pressed in order to open the back door 10, the drive motor 35 starts and the forced unlocking member 39 rotates, thereby unlocking the forced unlocking member 39. The circular arc portion 39a contacts the abutted protrusion 76 of the locking plate 70 and pushes it down. As a result, the locking plate 70 swings clockwise about the pivot 71, and the riser protrusion 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 engages with the pivot 61.
As the striker 12 rises, the latch member 60 swings to the non-engaged position as shown in FIG. Also, at this time, input link 51 - output link 52 - output pin 5
3, the other end of the latch base 40 is lifted up,
The latch base 40 swings counterclockwise about the pivot 41 and rises from the lowered position.

Further, when the drive motor 35 rotates, as shown in FIG. 14, the output pin 53 is at the top dead center, the latch member 60 is in the disengaged position, and the latch base 40 is in the raised position. Around this time, the unlocking circular arc portion 39a of the forced unlocking member 39 comes to push 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 shown in FIG. 14, the back door 10 can be manually lifted and opened.

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

[0035] Closure device 20a according to the above embodiment
In the above, since the striker guide groove 21 was formed in the support base 20 fixed to the vehicle body, the closure device 20a
Even if the latch member 60 has an arcuate swing trajectory centered on the pivot shaft 41, the difference in the trajectory between the latch member 60 and the striker 12 is as follows. When the striker 12 enters the striker guide groove 21, the striker 12 slips against the latch member 60, so that it is absorbed and malfunction does not occur. Furthermore, compared to, for example, a structure in which a striker guide means is provided on the latch base 40 on the moving side, the structure is simpler and costs can be reduced.

[0036]

[Effects of the Invention] According to the closure device for a back door for an automobile according to the present invention, the other end of the latch base is swung around one end in both directions of the vehicle body, and the latch base is moved away from the one end toward the other end. The striker is pulled in through the latch member provided at the position where the back door is closed, so if there is an empty space on the other end of the latch base, the striker can be inserted into that space against the large seal reaction force. If there is no free space on the other end of the latch base and there is free space on one end, install the retraction mechanism in that space. It is possible to set the output according to the seal reaction force, and it is possible to improve mounting performance.

[Brief explanation of drawings]

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

FIG. 2 is a perspective view of a closure device in an installed state showing an embodiment of the present invention.

FIG. 3 is a side view of a closure device in an installed state showing an embodiment of the present invention.

FIG. 4 is a partially cutaway perspective view of a closure device according to an embodiment of the present invention, as seen diagonally from the rear.

FIG. 5 is a perspective view of a closure device showing 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 one embodiment of the present invention.

FIG. 9 is an explanatory diagram of the operation of a closure device showing an embodiment of the present invention.

FIG. 10 is an explanatory diagram of the operation of a closure device showing an embodiment of the present invention.

FIG. 11 is an explanatory diagram of the operation of a closure device showing an embodiment of the present invention.

FIG. 12 is an explanatory diagram of the operation of a closure device showing an embodiment of the present invention.

FIG. 13 is an explanatory diagram of the operation of a closure device showing an embodiment of the present invention.

FIG. 14 is an explanatory diagram of the operation of a closure device showing an 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)

[Claims] Claim 1: A striker is fixed to one side of the back door and the periphery of the door opening, and a latch member that engages and disengages from the striker is provided on the other side of the back door and the periphery of the door opening. In the automobile back door closure device, the back door is closed by retracting the striker via the latch member, a support base being fixed to the other of the back door and a peripheral edge of the door opening; a latch base, one end of which is pivotably pivoted to the support base, and the latch member is mounted at a position spaced apart from the one end toward the other end; A closing device for a back door for an automobile, characterized in that the latch base has a retraction mechanism that swings the other end downward around one end of the latch base and retracts a striker through the latch member.