JPH0317015Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a door latch device for an automobile.

BACKGROUND TECHNOLOGY A base mounted on the door side has a claw that locks a striker mounted on the vehicle body side, and a detent lever that engages with the claw portion of the claw to maintain the striker locking state of the claw, that is, the latch state. An operating lever is attached to the base so as to be rotatable, and is rotated by operating the outer handle or inner handle of the door to release the detent lever from engagement with the claw claw portion and bring it into an unlatched state. In an automobile door latch device, a canceling lever is provided which rotates integrally with the detent lever, and a self-unlocking lever is provided between the operating lever and a key lock lever rotatably pivoted to the base. A lock lever is provided, and when the canceling lever and self-unlock lever are combined, the engagement of the detent lever with the claw is released even if the operating lever is turned in the unlatching direction when the key lock lever is in the lock position. A canceling function that automatically returns the key lock lever to the unlock position when the door is opened and the key lock lever is placed in the lock position and the door is simply closed to prevent the door from being inadvertently locked. It is now possible to obtain a so-called keyless lock function that allows the door to be locked by setting the key lock lever to the lock position with the door open and then closing the door while keeping the operating lever in the unlatched state. have been widely used (see, for example, Japanese Utility Model Application Publication No. 1983-61565).

Problems to be solved by the invention In the above-mentioned automobile door latch device, the base is made of a synthetic resin base with upper and lower plates made of sheet metal bonded to both sides, and the claw and daytent levers are made of synthetic resin. The canceling lever, self-unlocking lever, and operating lever are arranged on one side of the resin base, and the detent lever and canceling lever are arranged on the other side of the synthetic resin base. As a means for coaxially coaxially rotating the shaft, the conventional method has chamfered portions at both ends of the shaft that passes through the synthetic resin base, and a detent lever and a cancelling lever are respectively fitted into the chamfered portions. The shaft end is fixed by caulking.

However, in the conventional structure as described above, the shaft to which the detent lever and canceling lever are fixed can be rotated by either or both of the upper and lower plates that are bonded and fixed to the synthetic resin base and both the front and back sides of the base. Fit and connect so that
Since the fitting joint becomes the bearing of the shaft,
Extremely high precision is required for the fitting hole of the shaft, and if the hole in the synthetic resin base and the hole in the plate are even slightly displaced, the shaft will not rotate smoothly, making it difficult to unlatch the door, etc. The problem is that it becomes heavy.

The main purpose of the present invention is to address the above-mentioned conventional problems.

Means for Solving the Problems The present invention provides a door latch device as described above, in which the rotating shafts of the detent lever and cancelling lever are provided with chamfers at both ends into which the chamfered holes of the detent lever and cancelling lever are respectively fitted. The sleeve is fitted into the sleeve through-hole of the synthetic resin base, and
Both ends of the fixed shaft passing through the sleeve are fitted onto the upper and lower plates and fixed by caulking, so that the detent lever, canceling lever and sleeve can rotate together around the fixed shaft. This is what I did.

Operation As described above, the sleeve rotates around the fixed shaft whose both ends are securely crimped to both the upper and lower plates, so minute errors in the crimped fixing parts at both ends of the fixed shaft are caused by the synthetic resin. By making the diameter of the sleeve through-hole in the manufactured base large enough for the sleeve to pass through with some margin, sufficient absorption can be achieved within the margin, without requiring particularly strict accuracy. The detent lever and the canceling lever can always rotate together smoothly, and the operating feeling when opening and closing the door can be significantly improved.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, 1 is a base made of synthetic resin (hereinafter abbreviated as resin base), and the resin base 1
An upper plate 2 and a lower plate 3 (see FIG. 2) are bonded and fixed to both the front and back surfaces of the door latch device, and these constitute the base A of the door latch device.

On one surface of the resin base 1, there is a claw 4 having a locking groove 4a into which a striker 20 fixed to the vehicle body is fitted and locked, and a detent lever 5 that engages with claws 4b, 4b' of the claw 4. A canceling lever 6 is mounted on the other surface of the resin base 1 so as to rotate together with the detent lever 5 on the same axis, and an operating lever 7 is mounted on the other surface of the resin base 1 so as to be rotatable.
is rotatably pivoted, and a self-unlock lever 8 has one end connected to an operating lever 7.
The other end is engaged with the key lock lever 9 so as to be slidable in the vertical direction in the figure.

As shown in FIGS. 1 and 2, the shaft-mounted structure of the detent lever 5 and canceling lever 6 penetrates through the resin base 1, and both ends are fitted into the upper and lower plates 2 and 3 and fixed by caulking. a fixed shaft 10, which is rotatably fitted on the outer periphery of the fixed shaft 10, and has chamfered parts 11a, 11 of hexagonal shape, etc., at both ends.
b, the sleeve 11 is fitted around the outer periphery of the fixed shaft 10, and the sleeve 11 is inserted into the through hole 1a formed in the resin base 1.
The chamfered portions 11a, 1 of the sleeve 11
The chamfered holes 5a and 6a of the detent lever 5 and the canceling lever 6 are fitted into the detent lever 5 and the canceling lever 6, respectively, and fixed by caulking. 21 and 22 are bushes made of an elastic material such as synthetic resin, and 23 is a sealing washer.

In the figure, 12 is a shaft that rotatably supports the claw 4, and 13 and 14 are operating levers 7.
and a shaft rotatably supporting the key lock lever 9, 15 is a shaft rotatably attaching one end of the self-unlock lever 8 to the operating lever 7, 16, 17, 18 are the claws 4,
Detent lever 5, operating lever 7
and 19 are toggle springs that hold the key lock lever 9 in the lock position and the unlock position, respectively.

In the above configuration, when the door is closed from the open state, the striker 20 fixed on the vehicle body side is activated by the door latch device attached to the door side.
The striker 20 approaches one side edge of the locking groove 4a of the claw 4 which is in the unlatched position as shown by the chain line in FIG. While pressing and rotating counterclockwise, it fits into the locking groove 4a as shown by the solid line.

When the claw 4 rotates, the locking portion 51 of the detent lever 5 slides on the outer peripheral surface of the claw 4, and when the striker 20 fits into the locking groove 4a of the claw 4, it engages with the claw portion 4b. Hold the latched state.

Next, when the outer handle or inner handle (both not shown) provided on the door is unlatched, the operating lever 7 rotates clockwise in FIG. moves upward. Then, the unlatch operating protrusion 81 provided on the self-unlocking lever 8 engages the canceling lever 6.
1, and rotate the canceling lever 6 clockwise in FIG. When the canceling lever 6 rotates, the sleeve 11 and the detent lever 5 also rotate integrally around the fixed shaft 10, and the locking portion 51 of the detent lever 5 is rotated.
The engagement between the claw portion 4b and the claw portion 4b is released, and the claw 4 is rotated clockwise in FIG. .

The above description of the latching and unlatching operations is based on the case where the key lock lever 9 is in the unlocked position, and the upward movement of the self-unlocking lever 8 during the unlatching operation is as follows:
It is guided by a fitting protrusion 9a of a key lock lever 9 which is fitted into a long hole 8a of the self-unlock lever 8 so as to be slidable in the vertical direction.

In the door latch state shown by the solid line in FIG. 1, when the key lock lever 9 is rotated counterclockwise from the unlatched state shown in the drawing to the locked state by operating the inner lock lever (not shown) or by operating a key from the outside, the key lock lever 9 is turned into the locked state. The fitting protrusion 9a of the lever 9 is displaced to the right from the state shown in FIG. It is displaced from a position closely facing the lower part of the portion 61 to a position off to the right in the figure. Then, even if the outer handle or the inner handle is unlatched and the operating lever 7 is rotated clockwise and the self-unlock lever 8 is moved upward, the unlatch operation protrusion 81 of the self-unlock lever 8 will not move along the movement trajectory. Since the bent portion 61 of the selling lever 6 is not positioned, the canceling lever 6 and the detent lever 5 cannot be rotated in the unlatching direction.
This results in a so-called idle lock state.

After operating the inner lock lever with the door open and setting the key lock lever 9 to the lock position, when the door is closed, the self-unlock lever 8 is activated as described above by setting the key lock lever 9 to the lock position. It is rotated to the right from the position shown in the first figure, and the contact surface 82 provided on the right side is in a state close to and opposed to the pressing part 62 formed on the canceling lever 6. As the striker 20 relatively approaches, the claw 4 rotates counterclockwise in the figure, and the locking portion 51 of the detent lever 5 relatively slides on the outer circumferential surface of the claw 4, causing the claw portions 4b', 4b to rotate. When the detent lever 5 rotates clockwise when it passes over the shoulder part, the canceling lever 6 rotates clockwise as well, and the pressing part 62 hits the contact surface 82, causing the self-unlocking lever 8 to move counterclockwise. The key lock lever 9 is forcibly rotated clockwise via the fitting protrusion 9a to the unlock position.
This provides a canceling function that prevents the door from being inadvertently locked and automatically returns the door to the unlocked state.

When the key lock lever 9 is set to the lock position with the door open and the door is closed with the outer handle unlatched, the unlatching operation rotates the operating lever 7 and pushes the self-unlocking lever 8 upward. This allows the contact surface 82 to contact the pressing portion 6 of the canceling lever 6.
2, and even if the detent lever 5 and the canceling lever 6 are rotated clockwise due to the rotation of the claw 4, the pressing portion 6
Since the abutting surface 82 is not located on the rotational trajectory of the key lock lever 9, the key lock lever 9 is not forcibly returned to the unlock position, and so-called keyless locking can be performed.

Effects of the Invention In each of the above operations, in the present invention, the fixed shaft 10, which is the common rotation center of the detent lever 5 and the canceling lever 6, is fixed at both ends by caulking to both the upper and lower plates 2 and 3. The sleeve 11 fitted on the fixed shaft 10 serves as the rotation axis of the detent lever 5 and canceling lever 6, so that the upper and lower plates and the resin base that constitute the base are fixed as in the conventional case. Compared to a structure in which the shaft fitting hole provided in the shaft itself serves as a rotation bearing for the detent lever and cancelling lever, the precision of the holes in the plates 2 and 3 for fitting and fixing the fixed shaft 10 is Strict accuracy is not required, and by making the sleeve through-hole 1a of the resin base 1 have a diameter with some margin relative to the sleeve 11, a certain amount of manufacturing error can be absorbed within the margin. The disadvantages of the conventional structure, such as the heavy rotation of the detent lever 5 and the canceling lever 6, can be completely eliminated.

Further, as shown in FIG. 2, if bushes 21 and 22 made of an elastic material such as synthetic resin are interposed between the outer circumferential surface of the fixed shaft 10 and the inner circumferential surface of the sleeve 11, the sleeve 11 can be attached to the fixed shaft 10. The door can be rotated smoothly without play, and the operation is even smoother, resulting in a significant improvement in the operational feeling when opening and closing the door.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a sectional view of the pivoting structure of the detent lever and cancelling lever shown in FIG. 1. 1... Resin base, 2, 3... Plate, 4...
... Claw, 5 ... Detent lever, 6 ... Canceling lever, 7 ... Operating lever, 8 ... Self-unlock lever, 9 ... Key lock lever, 10 ... Fixed shaft, 11 ... Sleeve, 11a, 11b... Chamfered portion, 20... Striker.

Claims (1)

[Scope of utility model registration request] A claw that locks a striker attached to the vehicle body on one side of the synthetic resin base, which is formed by bonding and fixing sheet metal plates to both the front and back sides of the synthetic resin base, and a claw of the claw engages with the claw. The detent levers that hold the striker of the claw in the locked state, that is, the latched state, are rotatably pivoted, and a canceling lever that rotates integrally with the detent lever is mounted on the other surface of the synthetic resin base. and an operating lever that rotates when the outer handle and the inner handle are operated, one end of which is rotatably pivoted to the operating lever, and the other end of which is engaged with a key lock lever. When the operating lever is rotated in the unlatching direction, the self-unlocking lever rotates the canceling lever, and the rotation of the canceling lever causes the detent lever to move from the claw part of the claw. An unlatching operation function that rotates in the unlatched direction and becomes unlatched. If the key lock lever is set to the lock position in the latched state, the self-unlocking lever will not swing against the canceling lever even if the operating lever is rotated in the unlatching direction. If the key lock lever is set to the lock position with the door open and the door is simply closed, the canceling lever will rotate in unison with the detent lever. The canceling function automatically returns the key lock lever to the unlock position via the self-unlock lever, and after the key lock lever is set to the lock position with the door open, the door can be opened while the operating lever is rotated in the unlatching direction. In a door latch device that has a keyless lock function that can lock the door when the door is closed,
A sleeve with chamfered parts formed at both ends to fit into the chamfered hole of the detent lever and the chamfered hole of the cancelling lever, respectively, is fitted into the sleeve through-hole of the synthetic resin base, and the sleeve is passed through. Both ends of the fixed shaft are fitted and fixed with sheet metal plates bonded and fixed to both the front and back sides of the synthetic resin base, and the sleeve, detent lever, and cancelling lever are integrated around the fixed shaft. A door latch device for an automobile, characterized in that it is configured to be rotatable.