JP2523630Y2 - 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 linked to it is rotated by operating the operating lever when the key lock lever is in the unlocked position. And rotate the day tent lever to release the engagement with the claw and release the engagement between the claw and the door striker Can be in the unlatched state,
When the key lock lever is in the locked position, the operating lever can be operated, and even if the self-unlock lever rotates, the rotation trajectory does not interfere with the detent lever, and the detent lever can be rotated. Instead, a so-called idle swing lock state is set (for example, see Japanese Utility Model Publication No. 58-23885).

In addition to the basic components described above, an actual door latch device includes an inside lever for enabling the operating lever to rotate from the vehicle interior and an inside lock for operating the key lock lever from the vehicle interior. A lever, a child lock lever and related parts for preventing the child from accidentally opening the door while traveling, are usually mounted on 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 operation-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 thereof.

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 inside lever, which are attached to the middle portion of the door inner panel in the front-rear direction or slightly forward thereof, are connected to the inside lever by a connecting rod, and the inside lever is rotated by operating the inner handle from the vehicle interior. Then, the operating lever is rotated to perform the unlatch operation, so if the clearance between the window glass and the door inner panel is small as described above, the inside lever and the connecting rod may be connected to the window glass. It is very difficult to assemble without interfering with the elevating, and there is a problem that it is extremely difficult to assemble the door latch device particularly when the window glass has a small radius of curvature.

The present invention is mainly intended to address the conventional problems as described above.

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, A first feature is that an inside link is provided to connect the inside lever and the operating lever, and the inside link is associated with a child lock lever, and a function as a canceling lever that is an idle swing function component of the child lock mechanism. Is a second feature of the present invention.

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. Therefore, the connecting rod can be provided with a margin, and the assembling work of the door latch device can be simplified.

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 is provided on the rising surface of the upper plate 1b in a plane perpendicular to the rotation surface of the key lock lever 5. The base end of the key lock lever 5 is fitted and engaged with a fork portion 10a formed at one end of the inside lock lever 10, and the other end of the inside lock lever 10 is connected to a connecting rod (not shown). By operating the inner lock knob from the interior of the vehicle, the inside lock lever 10 is rotated to operate the key lock lever 5 to the locked position and the unlocked position.

Reference numeral 11 denotes an inside lever for rotating the operating lever 4 toward the passenger compartment side. 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. . 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 is slidable in an elongated hole 12b formed in an upper end of the inside link 12. And the inside link
A pressing portion 12 a is formed in the bending portion 12 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.

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 becomes narrower 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.

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. This makes it possible to simplify the assembling work and reduce the cost associated therewith, and 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,
S ... Door striker.

Claims (2)

(57) [Scope of request for utility model registration] An upper portion of a base plate provided with a claw that engages with a door striker when the door is closed and a detent lever that engages with a claw portion of the claw and maintains a state of engagement of the claw with the door striker. An operating lever that pivots by operating a door outer handle and pivots the detent lever via a self-unlocking lever and a canceling lever is pivotally mounted on the operating lever, and the self-unlocking lever is provided below the base plate. In a door latch device for an automobile provided with a key lock lever for moving the inside lever to a position not interfering with the canceling lever, an inside lever connected to a door inner handle is pivotally mounted on a lower portion of a base plate so as to be rotatable, and Inside door that connects to the above operating lever Automotive door latch device which characterized in that a click. 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.