JP3163828B2 - Vehicle door lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle door lock device for locking a door for opening and closing a rear opening of a vehicle to a vehicle body.

[0002]

2. Description of the Related Art FIG. 6 (a) shows an opening 8 formed in a rear portion of a vehicle body of an automobile (see N14 type car D-46, a new model manual issued by Nissan Motor Co., Ltd. in August 1990). . The vehicle body opening 8 is opened and closed by a back door 2 connected to the upper part of the vehicle body opening 8 via a hinge, and the lower part of the back door 2 is connected to the lower part of the vehicle body opening 8 by the back door lock device 1. It has become. The back door lock device 1 includes a door side lock portion 3 provided at a lower portion of the back door 2 and a vehicle body panel 4 forming a vehicle body opening 8.
And a vehicle body side lock portion 5 provided on the vehicle.

As shown in FIG. 6 (b), the door side lock portion 3 has a lock plate 13 and a lock release lever 17 supported by a back door lock body 9 fixed to a door panel 2a. . The back door lock body 9 is provided with a striker insertion groove 7 located between the lock plate 13 and the lock release lever 17 and having guide slopes 7a, 7a formed in the opening. A lock plate 13 is arranged on one side of the striker insertion groove 7.

[0004] The lock plate 13 is rotatably supported by a pin 11 supported by the back door lock body 9. A screw coil spring 12 is provided on the pin 11, and the lock plate 13 is urged by the torsion coil spring 12 in the lock unlocking position direction (the direction of the arrow A in FIG. 6B). In addition, the lock plate 13
A lever 19 is formed at one end with the pin 11 interposed therebetween, and a fork 21 is formed at the other end. Fork part 2
Reference numeral 1 denotes a lock guide portion 21a and a lock portion 21b which are formed in a substantially C shape. The lock guide 21 a is engaged with the lock release lever 17 at the lock position of the lock plate 13.

[0005] The lock release lever 17 is disposed on the opposite side of the lock plate 13 with the striker insertion groove 7 interposed therebetween.
It is rotatably supported by a pin 15 supported by the back door lock body 9. The pin 15 has a torsion coil spring 1
6, a direction in which the lock state of the lock plate 13 is maintained by the torsion coil spring 16 (FIG. 6).
The lock release lever 17 is urged in the direction of arrow B). The lock release lever 17 has a lever portion 23 formed on one end side, and engagement surfaces 17a and 17b with which a lock guide portion 21a of the lock plate 13 is engaged are formed in an intermediate portion. Further, a receiving portion 25 protruding from the notch 9a (see FIG. 8) of the back door lock body 9 on the other end side.
Is provided.

On the other hand, as shown in FIG. 6 (b), the vehicle body side locking portion 5 includes a striker body 27 fixed to a peripheral portion of the vehicle body opening 8, a striker 29 supported by the striker body 27, And a lock release link 31 supported by the striker body 27. As shown in FIG. 7, the striker body 27 includes a base 30 fixed to the vehicle body panel 4 and a step 28 bent at a substantially right angle from the base 30.
a and a support plate 28 that is bent substantially parallel to the base 30 continuously to the step 28a. Base 3
At 0, a U-shaped striker 29 (see FIG. 8) is supported. Further, a lock unlocking link 31 is rotatably supported on the support plate 28 by a pin 33.
The pin 33 is provided with a torsion coil spring 35. The torsion coil spring 35 is used for the unlocking link 3
6 is urged in the direction of arrow C in FIG. As shown in FIG. 6B, the lock unlocking link 31 has a connecting portion 37 connected to a wire 39 at one end thereof.
On the other end side, there is formed a pressing portion 41 which applies an unlocking force to the receiving portion 25 of the lock unlocking lever 17 and is located at a predetermined distance from the lock unlocking lever 17 in the locked state.

In such a back door lock device 1, when the back door is opened from a state in which the vehicle body opening 8 is closed, the lock release lever 17 is operated by operating a back door handle (not shown) or the like. The unlocking link 31 is rotated by applying an unlocking force to the lever portion 23 or by remote control by operating an opening lever (not shown) on the vehicle interior side to unlock the receiving portion 25 of the unlocking lever 17. Gives tablet strength.

For example, when the wire 39 is pulled in the direction of the arrow by operating the release lever on the vehicle interior side from the state shown in FIG.
5, the pressing portion 41 comes into contact with the receiving portion 25 of the lock release lever 17. When the pressing portion 41 comes into contact with the receiving portion 25 of the lock release lever 17, the lock release lever 17 rotates against the urging force of the screw coil spring 16, and the lock guide portion 21a of the lock plate 13 moves the lock release lever. 17 is disengaged from the engaging surface 17a. Lock plate 1
When the third lock guide portion 21a comes off the engagement surface 17a,
As shown in FIG. 9, the lock plate 13 rotates to the unlock position by the urging force of the torsion coil spring 12 to release the locked state, and the back door 2 can be opened.

Next, when the back door 2 is closed, the striker 29 of the vehicle body side lock portion 5 is inserted into the striker insertion groove 7 of the door side lock portion 3, and the striker 29 and the lock guide portion 21a come into contact. When the striker 29 comes into contact with the lock guide portion 21a, the lock plate 13 rotates against the urging force of the torsion coil spring 12, and the lock portion 21b
Is inserted into the striker 29. At the same time,
The lock guide portion 21a is the engagement surface 1 of the lock release lever 17
7b, the engaging surface 1 as shown in FIG.
7a. As a result, the lock plate 13 is prevented from rotating to the unlock position, the locked state is maintained, and the vehicle body opening can be closed by the back door.

[0010]

By the way, when a heavy heavy load or the like is loaded on the vehicle through the opening 8 at the rear of the vehicle while the vehicle is stopped, the striker 29 is accidentally hit by the striker 29,
May be deformed as shown in FIG. In this case, even if the back door 2 is closed with the striker 29 being deformed, the back door lock device 1 may not operate.

That is, as shown in FIG. 10, when the striker 29 is deformed to the pin 33 side, when the back door 2 is closed, the guide slope 7a on the back door lock body 9 side.
Abuts against the striker 29, and the guide slope 7 a is slidably guided by the striker 29 to forcibly move the back door lock body 9 toward the support plate 28. Therefore, the back door 2 is displaced with respect to the vehicle body. When the back door 2 is displaced with respect to the vehicle body, the receiving portion 2 of the lock release lever 17
5 comes into contact with the pressing portion 41 and interferes therewith.
7 is rotated in the unlocking direction. As a result, the engagement surface 1
7a, the lock guide portion 21a of the lock plate 13 comes off, and the lock plate 13 is
This is because the door-side lock portion 3 and the door-side lock portion 5 cannot be locked in the lock release direction by the urging force of 2.

Therefore, the present invention provides a vehicle door that can be securely locked without interference between a lock release lever and a lock release link even if the door is displaced relative to the vehicle body. It is an object to provide a locking device.

[0013]

According to the first aspect of the present invention, there is provided a lock plate provided on a door side for opening and closing a vehicle body opening and movable between a lock position and an unlock position. The lock plate is locked at a lock position and a door-side lock portion having a lock unlocking lever capable of releasing the lock is fixed to a peripheral portion of the vehicle body opening, and the lock is provided when the door is closed. The plate is supported by a striker that moves to the locked position and engages therewith and a support portion provided on a peripheral edge of the vehicle body opening,
A door lock device for a vehicle, comprising: a vehicle body side lock portion having a lock unlocking link capable of pressing in a lock unlocking direction by rotating the lock unlocking lever facing the striker side when the door is closed. Connecting the striker and the support portion of the lock unlocking link, displacing the lock unlocking link support position in accordance with the displacement of the striker toward the lock unlocking link support portion, and It is characterized in that a connecting member for maintaining a distance from the lock unlocking link is provided.

According to a second aspect of the present invention, in the first aspect of the present invention, the support portion of the unlocking link is supported on a peripheral portion of an opening of the vehicle body via a support plate, and the support plate promotes deformation. It is characterized by having a section.

[0015]

According to the first aspect of the present invention, when the striker is displaced toward the support portion of the lock release link, the connecting member displaces the support portion of the lock release link in accordance with the displacement of the striker, and the lock is released. Maintain the distance between the lever and the unlock link.

According to the second aspect of the present invention, when the striker is displaced toward the support portion of the unlocking link, the support plate is deformed from the deformation promoting portion to displace the supporting portion of the unlocking link. Therefore, even if the door is displaced relative to the vehicle body, the distance between the lock release lever and the lock release link is maintained.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a vehicular back door lock device according to the present invention. In addition,
FIG. 1 is a front view showing a vehicle back door lock device 43 of the present embodiment. FIG. 2 is an exploded perspective view showing the vehicle back door lock device. 3 is a view from the direction of arrow A in FIG. 1, and FIG. 4 is a view from the direction of arrow B in FIG.

The vehicle back door lock device 4 of the present embodiment.
3 has the same basic configuration as the back door lock device 1 shown in FIG. 6B, and in the following description, only portions different from the back door lock device 1 shown in FIG. 6B will be described. The back door lock device 43, as shown in FIG.
A connecting rod (connecting member) 45 for connecting the striker 29 and a support (pin 33) of the unlocking link 31 is provided. The connecting rod 45 displaces the support of the lock unlocking link 31 in accordance with the displacement of the striker 29 toward the support of the lock unlocking link 31, and the locking unlock lever 17.
And the lock-unlocking link 31 is maintained.

As shown in FIG. 2, the connecting rod 45 has a ring portion 49 formed at one end of a straight connecting rod body 47 and a ring portion 51 having a smaller diameter than the ring portion 49 formed at the other end. I have. One of the loops 49 is formed by bending one end of the connecting rod body 47 into an arc shape, and has an inner diameter larger than the diameter of the striker 29. The loop portion 49 is connected to the connecting portion 55 of the striker 29. The connecting portion 55 of the striker 29 is provided at a predetermined interval with the locking flange 5
7, 57 are provided. These locking flanges 57, 5
While the loop portion 49 of the connecting rod 45 is connected between 7,
The movement of the connecting portion 55 in the axial direction is regulated and positioned by the locking flange portions 57 and 57.

On the other hand, as shown in FIG.
Is formed by bending the other end of the connecting rod body 47 into an arc shape,
The inner diameter is formed larger than the diameter of the extension 59 of the pin 33. The pin 33 penetrates the support plate 28, and the penetrating portion 33a is welded all around. As described above, the unlocking link 31 and the torsion coil spring 35 are disposed on one end of the pin 33, and an L-shaped extension 59 is formed on the other end. The extension portion 59 includes a straight portion 61 extended to substantially the same height as the striker 29, and a connecting portion 63 that is continuous with the straight portion 61 and bent substantially parallel to the connecting portion 55 of the striker 29. The upper end of the connecting portion 63 extends to a position corresponding to the locking flange 57. At the upper end, locking flanges 65 are provided at predetermined intervals. The ring 5 is interposed between the locking flanges 65, 65.
1 are connected, and the movement of the connecting portion 63 in the axial direction is regulated by the locking flange portions 65, 65, thereby positioning the connecting portion 63.

In the connected state, the connecting rod body 47 is substantially perpendicular to the connecting portion 55 of the striker 29 (see FIG. 1).

As shown in FIG. 3, the support plate 28 for supporting the pin 33, which is the support portion of the unlocking link 33, on the periphery of the opening of the vehicle body is provided at the base of the step portion 28a (the base 30 side). Along the notch 67 which is a deformation promoting portion.
Are formed.

Next, the operation will be described.

When a firm load is loaded on the vehicle from the vehicle body opening 8, the striker 29 is accidentally hit with the striker 29.
May be deformed. In this state, a case where the vehicle body opening 8 is closed by the back door 2 as shown in FIG. 4 will be described.

As shown in FIGS. 5 (a) and 5 (b), when the striker 29 is deformed toward the unlocking link 31 by an excessive force and the connecting portion 55 is displaced toward the unlocking link 31, The portion 49, the connecting rod main body 47, and the ring portion 51 move toward the unlocking link 31 (the direction of the arrow b), and press the upper end of the connecting portion 63 in the same direction. When the upper end of the connecting portion 63 is pressed in the direction of the arrow b, a torsional force is applied to the straight portion 61, and the step 28 a is twisted from the lower end of the notch 67 as a starting point to promote deformation, and the support plate 28 The entirety moves in a direction away from the lock release lever 17. Then, the unlocking link 31 moves together with the pin 33, and the support position is displaced (the position before the movement of the pressing portion 41 of the support plate 28 is shown by an imaginary line in FIG. 5A).

When the back door 2 is closed with the striker 29 being deformed toward the unlocking link 31 in this manner, the guide slope 7a at the entrance of the striker insertion groove 7 is guided by the striker 29 and slides. Door lock body 9
The striker 29 is inserted into the striker insertion groove 7 while forcibly moving the striker 29 toward the support plate 28 side. For this reason, the back door 2 is displaced to the lock unlocking link 31 side.

At this time, even if the back door 2 moves toward the lock / unlock link 31, in this embodiment, the support plate 28 and the pin 33 which already support the lock / unlock link 31 are used.
Is displaced in accordance with the displacement of the striker 29, the distance between the lock release lever 17 and the lock release link 31 can be maintained, and interference between the lock release lever 17 and the lock release link 31 can be prevented. Can be prevented. Therefore, the lock guide portion 21 of the lock plate 13 is securely locked to the engagement surface 17 a of the lock release lever 17, and the lock portion 21 is engaged with the inside of the striker 29.

Accordingly, the lock guide portion 21a of the lock plate 13 does not come off the engagement surface 17a, and the locked state of the lock portion 21b to the striker 29 is maintained. As described above, according to the present embodiment, even if the striker 29 is deformed, the door-side lock portion 3 can be securely locked to the vehicle-body-side lock portion 5.

Further, in this embodiment, the notch 67 is provided as a deformation promoting portion, so that the step portion 28 is easily deformed from the notch 67 and the support plate 28 is largely deformed. The distance between the lock and the unlock link 31 is maintained.

Even if the support plate 28 moves away from the unlocking lever 17 due to the deformation of the step 28a, the unlocking link 31 moves together with the pin 33. Therefore, even if the support portion of the lock unlocking link 31 moves, its function does not suffer, and the wire 39 is pulled again when the back door is opened, and the lock unlocking link 3 is moved.
1 is rotated, the pressing portion 41 is
A lock releasing force is applied to the lock unlocking lever 17 to unlock the lock.

In the above embodiment, the support plate 28
The cutout 67 is provided in the step 28a in order to provide an opportunity to deform the step. However, the present invention is not limited to this, and the thickness of the step 28a may be locally reduced to serve as a deformation promoting section.

[0032]

As described above, according to the first aspect of the present invention, the striker and the support portion of the lock unlocking link are connected, and the striker is displaced toward the support portion side of the lock unlocking link. , Displace the support of the lock release link,
By providing a connecting member for maintaining a distance between the lock release lever and the lock release link, even when the back door is displaced relative to the vehicle body due to deformation of the striker, the connection between the lock release lever and the lock release link is established. The space is maintained, and the lock unlocking lever and the lock unlocking link can be securely locked without interference.

According to the second aspect of the present invention, the support portion of the unlocking link is provided on the periphery of the opening of the vehicle body via the support plate, and the deformation promoting portion is provided on the support plate, so that the displacement of the striker is achieved. As a result, the support plate is easily deformed from the deformation promoting portion, the support portion of the lock unlocking link is securely displaced, and the distance between the lock unlocking lever and the lock unlocking link is maintained. Therefore, the lock unlocking lever and the lock unlocking link can be reliably locked without interference.

[Brief description of the drawings]

FIG. 1 is a front view showing a back door lock device according to the present invention, showing a state in which a door side lock portion and a vehicle body side lock portion are engaged.

FIG. 2 is an exploded perspective view showing the back door lock device according to the present invention.

FIG. 3 is a view showing the back door lock device according to the present invention, as viewed in the direction of arrow A in FIG. 1;

FIG. 4 is a view showing the back door lock device according to the present invention, as viewed in the direction of arrow B in FIG. 1;

FIG. 5 shows a back door lock device according to the present invention,
(A) is a front view showing a state in which the door-side lock portion is relatively displaced with respect to the vehicle body panel-side lock portion, and (b) is a view showing A in (a).
It is a direction arrow view.

FIG. 6A is a perspective view showing a vehicle body opening and a back door that opens and closes the vehicle body opening, and FIG. 6B shows a conventional back door lock device, in which a door side locking part and a vehicle body side locking part are shown. FIG. 4 is a front view showing a state in which is engaged.

7 shows a conventional back door lock device, and FIG.
FIG. 3B is a view as viewed in the direction of arrow A in FIG.

8 shows a conventional back door lock device, and FIG.
It is a B direction arrow line view of (b).

FIG. 9 is a front view showing the conventional back door lock device, showing a state where the door side lock portion and the vehicle body side lock portion are not engaged.

FIG. 10 is a front view showing the conventional back door lock device, showing a state in which an unlock lever and an unlock link interfere with each other.

[Explanation of symbols]

 9 Backdoor lock body 13 Lock plate 17 Lock release lever 27 Striker body 29 Striker 31 Lock release link 43 Backdoor lock device 45 Connecting rod 67 Notch

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E05B 65/32 B60J 5/10 E05B 65/19

Claims (2)

(57) [Claims] 1. A lock plate provided on a door side for opening and closing an opening of a vehicle body, the lock plate being movable between a lock position and an unlock position, the lock plate being locked at a lock position and the lock being released. A door-side lock portion having a freely unlocking lever; a striker fixed to a peripheral portion of the vehicle body opening, wherein the lock plate moves to a lock position and engages when the door is closed; A vehicle-side lock having a lock-unlocking link that is supported by a supporting portion provided at a peripheral portion and that can be pressed in the lock-unlocking direction by rotating the lock-unlocking lever facing when the door is closed to the striker side; A door lock device for a vehicle, comprising: a lock unit for connecting the striker to a support unit of the lock unlocking link; A vehicle provided with a connecting member for displacing the support portion of the lock unlocking link in accordance with the displacement toward the support portion side and maintaining a gap between the lock unlocking lever and the lock unlocking link; Door lock device. 2. The vehicle according to claim 1, wherein a support portion of the unlocking link is supported on a peripheral portion of the vehicle body opening via a support plate, and the support plate is provided with a deformation promoting portion. Door lock device for vehicles.