JP2523631Y2 - Automotive door latch device - Google Patents

Description

The present invention relates to an automobile door latch device.

2. Description of the Related Art A door latch device of an automobile basically includes a claw that is engaged with a door striker fixed to a vehicle body when a door is closed, and an engagement state (a latch state) of the claw that is engaged with the door striker. State), an operating lever, a key lock lever, and a self-locking mechanism having one end pivotally connected to the key lock lever and the other end connected to the operating lever by a long hole fitting or a link lever or the like. When the key lock lever is in the unlocked position, the self-unlock lever connected to it is turned by operating the operating lever when the key lock lever is in the unlocked position. To move the daytent lever to release the engagement with the claw and release the engagement between the claw and the door striker. However, when the key lock lever is in the locked position, the operating lever is operated, and even if the self-unlock lever rotates, the rotation locus does not interfere with the detent lever. As a result, the day tent lever cannot be rotated, and a so-called idle swing lock state is established (for example, see Japanese Utility Model Publication No. 58-23885).

In addition to the basic components described above, an actual door latch device has an insight lever for enabling the operating lever to rotate from the vehicle interior and an inside lever for operating the key lock lever from the vehicle interior. A lock lever and a child lock lever and related parts for preventing a child from accidentally opening the door while traveling are assembled to the base plate.

Problems to be Solved by the Invention In the above-described door latch device for an automobile, conventionally, members related to unlatch operation such as an operating lever, an inside lever, and a child lock lever are disposed on an upper portion of a base plate, and a key lock lever and an inside lock are provided. A lock-related member such as a lever is disposed at a lower portion of the base plate, and a latch-related member such as a claw and a detent lever is generally disposed at an intermediate portion between them.

However, in recent years, as the thickness of automobile doors has been reduced, the clearance between a door window glass that moves up and down in the door and an inner panel of the door has become smaller. Since the curved surface glass is used for the door window glass, the clearance between the door window glass and the door inner panel has a margin in the middle part in the vertical direction, but the clearance is considerably small in the upper part, and particularly, the curvature radius of the curved glass is small. If smaller, the clearance at the top is minimal.

Therefore, in the door latch device, among the unlatch operation-related members attached to the upper portion of the base plate, the inside lever is attached to the base plate so as to rotate in a plane substantially parallel to the door inner panel,
The inner handle and the inner side lever, which are attached to a substantially middle portion of the door inner panel in the front-rear direction or slightly forward thereof, are connected to the inner side lever by a connecting rod, and the inner lever is turned by operating the inner handle from the vehicle interior. When the clearance between the window glass and the door inner panel is small as described above, the inside lever and the connecting rod are connected to the window glass because the operating lever is rotated to perform the unlatch operation. There is a problem that it is very difficult to assemble the door latch device without interfering with the ascending and descending of the door, and it is extremely difficult to assemble the door latch device particularly when the radius of curvature of the window glass is small.

In addition, when the inner handle is operated in the locked state, the key lock lever is automatically switched to the unlocked state and the unlatch operation is performed, and the function of opening the door when getting off the vehicle is simplified with the override mechanism. However, as in the above-mentioned conventional door latch device, an unlatch operation-related component is provided at an upper portion and a lock operation-related component is provided at a lower portion. There is also a problem that a dedicated component is required and the configuration becomes complicated.

The present invention is intended to address the above-mentioned conventional problems.

Means for Solving the Problems In the present invention, in an automobile door latch device as described above, an inside lever, which is conventionally provided at an upper portion, is rotatably mounted on a lower portion of a base plate together with a lock operation-related member, An inside link that connects the inside lever and the operating lever is provided, and the inside lock lever is in the locked position on one of the inside lever and the inside lock lever, and the inside lock lever is rotated when the inside lever is rotated in the unlatching direction. The first feature is that an engaging portion is provided for engaging the inner link with the child lock lever, and the inside link is associated with a child lock lever. Also used as a ring lever This is the second feature.

According to the first feature described above, the inside lever is located at a place where the clearance between the door window glass (curved glass) and the door inner panel is relatively large, and the connecting portion between the inside lever and the connecting rod is the door window glass. In addition, the connecting rod can be provided with a margin, and the assembling work of the door latch device can be simplified, and both the inside lever and the inside lock lever can be connected to the door latch device. Is provided at the lower part of the lever, so that it is possible to easily connect the two simply by providing an engaging portion on one of the levers by bending or the like, and obtain an override mechanism having a very simple structure. be able to.

In addition, the second feature does not increase the number of parts as compared with the conventional one, and does not lead to an increase in size or an increase in cost.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a base plate, which is a synthetic resin latch base 1a in which a claw 2 and a detent lever 3 are rotatably incorporated, and a steel plate joined and fixed to both front and back surfaces of the latch base 1a. Upper plate 1b and lower plate 1c.

Various levers, links, and the like, which will be described later, are assembled to the base plate 1 to form a door latch device. The lower plate 1c is attached to the inside of the rear end surface of the door and fixed to the door by bolts or the like. At the time of closing, the door striker S fixed on the vehicle body side hits one side edge of the engaging groove 2a of the claw 2 and engages in the engaging groove 2a while rotating the claw 2 and at the same time the detent lever 3 engages with the claw of the claw 2. When the claw 2 is rotated by the return spring, the door striker S is freely returned to its original position when the detent lever 3 is rotated to release the engagement with the claw 2b. It is in an unlatched state in which it can slip out of the engagement groove 2a.

Reference numeral 4 denotes an operating lever which is rotated by operating the door outer handle, and 5 denotes a key lock lever, which are rotatably mounted on the upper portion and the lower portion of the upper plate 1b of the base plate 1, respectively.

Reference numeral 6 denotes a self-unlocking lever. The lower end of the self-unlocking lever 6 is pinned to the tip of the key lock lever 5, and the upper end is connected to the lower part of the operating lever 4 via a link lever 7.

Reference numeral 8 denotes a canceling lever. The canceling lever 8 is coaxially connected to the detent lever 3 by a hexagonal collar 9 and rotates integrally with the detent lever 3.

When the key lock lever 5 is at the unlock position as shown by the solid line in FIG. 1, the protrusion 61 formed at the upper end of the self-unlock lever 6 is opposed to the leading edge 81 of the canceling lever 8. When the operating lever 4 is rotated clockwise in FIG. 1 in this state, the self-unlock lever 6
Swings counterclockwise about a pin attachment portion 62 at the lower end thereof, and the protrusion 61 abuts against the leading edge 81 of the canceling lever 8 to press and rotate it, thereby being integrated with the canceling lever 8. As a result, the detent lever 3 rotates to release the engagement of the claw 2 with the claw portion 2b, and the claw 2 can be brought into the unlatched state.

However, when the key lock lever is rotated counterclockwise in FIG. 1 to the locked position as shown by the dashed line, the self-unlock lever 6 is displaced upward as a whole as shown by the dashed line 6 ', In this state, the operating lever 4 is rotated clockwise and the self-unlock lever 6 swings counterclockwise. Department
Numeral 61 does not allow the canceling lever 8 to be depressed and rotated, so that it simply swings and the unlatching operation is not performed, so that a so-called miss swing lock (locked) state is set.

Reference numeral 10 denotes an inside lock lever for operating the key lock lever 5 from the vehicle interior side. The inside lock lever 10 has a substantially T-shape having three arms 10a, 10b and 10c. The key lock lever 5 is pivotally mounted on a rising surface of the inside lock lever 5 in a plane orthogonal to the rotation surface of the key lock lever 5 and a fork 10b 'formed at the end of the central arm 10b of the inside lock lever 10. The base end of the lock lever 5 is fitted and engaged, and the end of the lower arm 10a of the inside lock lever 10 is connected to the inner lock knob by a connecting rod (not shown). The lock lever 10 rotates to lock the key lock lever 5 in the locking position,
It can be operated to the unlocked position.

An engaging portion 14 is bent at one side edge of the upper arm portion 10c, and as shown by a chain line in FIG. And the engagement portion 14 is configured to face one side edge of the inside lever 11.

Reference numeral 11 denotes an inside lever for rotating the operating lever 4 from the inside of the vehicle. The inside lever 11 is mounted at the lower end of the rising surface of the upper plate 1b so as to be rotatable coaxially with the inside lock lever 10. Can be A lower end of an inside link 12 is pivotally attached to one end of the inside lever 11, and a projection 13b provided on a child lock lever 13 described later can slide in an elongated hole 12b formed in an upper end of the inside link 12. The inside link 12 is bent and formed with a pressing portion 12a which is fitted and engaged so as to be close to the lower edge 41 of the tip end of the operating lever 4.

The other end of the inside lever 11 is connected to the inner handle by a connecting rod (not shown), and by operating the inner handle, the inside lever 11 rotates clockwise in FIG. 2 to move the inside link 12 upward, The pressing portion 12a of the inside link 12 pushes up the lower edge 41 of the distal end portion of the operating lever 4 to rotate it, thereby enabling the unlatch operation (in the unlocked state) as described above.

Further, when the inside lock lever 10 is in the locking operation position, the engaging portion 14 provided on the arm portion 10c above the inside lock lever 10 faces one side edge of the inside lever 11, and the unlatch of the inside lever 11 is performed. The one-side edge of the inside lever 11 is engaged with the engaging portion 14 by the rotation in the direction, and is pressed and rotated in the unlocking direction, so that the key lock lever 5 is in the unlocking position. .

Reference numeral 13 denotes a child lock lever, and the child lock lever 13 is rotatably mounted on the upper end of the rising surface of the upper plate 1b. The child lock lever
The operation section 13a of FIG. 13 has a structure in which, when the door latch device is mounted in the rear end face of the door, the operation section 13a faces the operation hole provided in the rear end face of the door, and can be rotated only when the door is opened. ing.

When the child lock lever 13 is at the position shown by the solid line in FIG.
12a is close to and opposes the lower edge 41 of the distal end of the operating lever 4 so that the operating lever 4 can be pressed and rotated by operating the inner handle to perform the unlatching operation, but the child lock lever 13 is turned counterclockwise in FIG. When moved to the position shown by the dashed line, the inside link 12 rotates clockwise around the lower end pivoted portion, and the pressing portion 12a is displaced from the lower edge 41 of the tip end of the operating lever 4 as shown by the dashed line. In this state, even if the inside handle 11 is rotated by operating the inner handle and the inside link 12 is moved upward, the operating lever 4 cannot be rotated due to the missed swing, and thus the child is running, for example, mischief. To prevent the door from being opened unexpectedly when the inner handle is operated. It is those that can.

In the above, since the inside lever was conventionally mounted on the upper end of the rising surface of the upper plate 1b,
When the door latch device is attached to the door, the inside lever is located at a relatively high position inside the door.

On the other hand, since a curved glass that is convex outward is used for the door window glass, the clearance between the door inner panel and the curved glass is narrow at the upper part of the door and becomes wider toward the center of the door. In particular, when the radius of curvature of the curved glass is small, the difference in the clearance between the upper portion and the central portion of the door is large, and the clearance at the upper portion of the door is extremely small.

Therefore, in the related art in which the inside lever is provided in the upper portion of the door latch device, the connecting portion between the inside lever and the connecting rod is located at the upper part of the door where the clearance is smallest, so that the door lever does not interfere with the door window glass. In addition, the work of assembling the door latch device into the door becomes very troublesome, and particularly in the case of a door window glass having a small radius of curvature, it may be almost impossible to assemble in terms of space.

In the present invention, as described above, the inside lever 11 is mounted at the inside lock lever mounting position below the door latch device, so that the connecting portion between the inside lever 11 and the connecting rod is a door inner panel and a door window. At a position where the clearance between the glass and the glass is relatively large, assembly of the door latch device and arrangement of the connecting rod can be performed with sufficient margin.

When the inside lever 11 is provided at the lower portion as described above, the inside link 12 for connecting the inside lever 11 and the operating lever 4 provided at the upper portion is required. Since it also serves as a canceling lever, which is a part of the lock mechanism that is the swinging lock function of the lock mechanism, the number of components is the same as that of the conventional device, and there is no increase in size or increase in cost.

 Next, the override mechanism will be described.

In FIGS. 1 and 2, with the inside lock lever 10 and the key lock lever 5 in the locked position as shown by the chain line, the inner handle is operated to move the inside lever 11 to the second position.
In the figure, when the clockwise rotation is performed, one side edge of the inside lever hits the engaging portion 14 provided on the upper arm portion 10c of the inside lock lever 10 at the initial stage of the rotation, and the inside lock lever 10 is rotated clockwise. Then, the key lock lever 5 is switched to the unlock position. In this case, since the key lock lever 5 has a structure in which the key lock lever 5 is spring-supported at the unlocking and locking positions by the reversing spring 15 as is conventionally known, the inside lock lever 10 is As soon as the key lock lever 5 is rotated beyond the dead point of the reversing spring 15, the key lock lever 5 is quickly switched to the unlocked position by the spring force of the reversing spring 15, and the unlatch operation is performed by the subsequent rotation of the inside lever 11. .

That is, from the inside lever 11 to the inside link 12,
As described above, the key lock lever 5 is switched from the locked position to the unlocked position in the range of play of the unlatch operation transmission system to the operating lever 4 and the self-unlock lever 6, and the unlocking is performed only by operating the inner handle. Unlatch operation is performed to simplify the door opening operation when getting off the vehicle.

In the illustrated embodiment, the inside lock lever 10 is
14 shows an example in which the inside lever is bent.
11 is provided with the engaging portion 14 in a bent shape, and the inside lever
A structure may be employed in which the engaging portion of the inside lever 11 hits the side edge of the upper arm portion 10c of the inside lock lever 10 and presses and rotates this at the beginning of the rotation of the 11 in the unlatching direction.

As described above, the override function can be obtained with a very simple configuration in which the engagement portion 14 is formed by bending only one of the inside lever 11 and the inside lock lever 10.

Effect of the Invention As described above, according to the present invention, the door latch device can be mounted with a sufficient space in a door using a curved window glass having a small radius of curvature by improving a very simple configuration. It is possible to simplify the assembling work and to reduce the cost associated therewith, and it is possible to obtain an override mechanism without adding a dedicated part, which can bring a great effect in practical use.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, FIG.
2 is a side view, FIG. 3 is a rear view with the lower plate removed, and FIGS. 4 and 5 are AA and B- in FIG.
FIG. 6 is a cross-sectional view taken along line CC of FIG. 1, and FIG. 7 is a cross-sectional view taken along line DD of FIG. 1 Base plate 2 Claw 3 Detent lever 4 Operating lever 5 Key lock lever 6 Self-unlock lever 7
Link lever, 8 ... Cancelling lever, 10 ... Inside lock lever, 11 ... Inside lever, 12 ...
... inside link, 13 ... child lock lever,
14 ... engaging part, S ... door striker.

Claims (2)

(57) [Scope of request for utility model registration] 1. A claw that engages with a door striker when a door is closed, and a detent lever that engages with a claw portion of the claw and that is in a latched state while holding the door striker engaged with the claw are rotatably provided. At the top of the base plate
An operating lever which is turned by the operation of the door outer handle to turn the detent lever through the self-unlock lever and the canceling lever to bring the latch into an unlatched state is rotatably mounted on the shaft. A key lock lever for moving the lock lever between an unlocked position where the detent lever can be rotated via the canceling lever and a locked position where the lock lever does not interfere with the canceling lever; an inner lock knob; In an automotive door latch device provided with an inside lock lever that rotates by operating a lock knob to rotate a key lock lever to an unlocking position and a locking position, the inside lever connected to the door inner handle is turned to the lower portion of the base plate. Movably mounted on the shaft, Provided with an inside link interlocking the Idoreba and the operating lever,
When the inside lever is turned in the unlatching direction, an engagement portion that engages with the inside lock lever at the locked position and turns the inside lock lever to the unlock position is provided on either the inside lever or the inside lock lever. An automobile door latch device characterized by the above-mentioned. 2. A door latch device for an automobile according to claim 1, wherein a child lock lever is provided on an upper portion of the base plate, and a lower end portion of the inside link is pivotally attached to the inside lever, and is provided on an upper portion of the inside link. The protrusion of the child lock lever is slidably fitted in the elongated hole, and the inside link is provided with a pressing portion that is close to and opposes the lower edge of the distal end of the operating lever and that pushes up and rotates the operating lever by turning the inside lever. The vehicle is characterized in that, by setting the child lock lever to the lock position, the inside link is rotated around the lower end pivoting portion so that the pressing portion does not interfere with the operating lever. Door latch device.