KR20110135548A - Door latch for vehicle having backup lever - Google Patents

Abstract

PURPOSE: A vehicle door latch having a backup lever is provided to prevent the opening of a door due to inertial force in front side corrosion. CONSTITUTION: A vehicle door latch having a backup lever comprises an outside handle(10), a backup lever(20), and a return spring(16). The backup lever is connected to an outside handle. The backup lever is installed in a machine handle(14) around a door latch assembly. The inertial force of the door is operated along with the outside handle in collision. The return spring is installed the door latch to return the door latch to the home position using the elastic force.

Description

Door latch for vehicle having backup lever

The present invention relates to a door latch for a vehicle having a backup lever, and more particularly, by mounting a backup lever at an adjacent portion of an outside handle lever of a door latch that interlocks with an outside handle, The present invention relates to a door latch for a vehicle having a backup lever to prevent the door from being opened.

In general, an outside handle and an inside handle for opening and closing the door are mounted on the outside and the inside of a car door, and the door latch assembly is locked or unlocked by means such as a remote controller, a key, a switch, and the like inside the door panel. Is equipped.

Therefore, when the user attempts to open the door from the outside of the vehicle, when the user opens the buttons such as the remote control, the solenoid received the signal of the remote control operates in the opening direction of the door to unlock the door latch. By pulling the outside handle of the door in the opening direction, the door is opened.

Such a vehicle door may be opened by an inertial force during a door side collision, which may seriously affect the safety of the passenger.

To this end, in the related art, a balance weight 30 is applied to the inner side of the door outside handle 10 as shown in FIG. 4A to prevent the door from being opened by an inertial force during a collision, or as shown in FIG. 4B. Similarly, another backup lever 40 is directly attached to the inner side of the door outside handle 10.

When the balance weight 30 is applied, a large weight balance weight is required to perform the opening prevention function for a very large inertia force, resulting in weight and cost increase and at the same time in terms of layout for design. There is a very disadvantageous problem.

The backup lever 40 mounted directly on the outside handle 10 is mounted so that the outside handle is not bent in the opening direction by the inertia force, but has an advantage over the balance weight in terms of weight and cost, but safety regulations Due to the exposure of the backup lever, which is an important component related to the collision environment, there is a risk of breakage in the event of a door side collision, a loss of function due to the damage, and the risk of damage to the backup lever and its surrounding parts in succession in the event of a collision. Because of this large, there is a disadvantage that is vulnerable to durability and weather resistance.

The present invention has been made to solve the above-mentioned conventional problems, by mounting a backup lever of a simple structure around the handle lever of the door latch assembly interlocking with the outside handle, the inertial force during the impact of the door side acts out Even though the side handle is flipped in the open direction, the backup lever prevents the handle lever that interlocks with the outside handle from being rotated to the open position, so that the door can be easily prevented from opening due to the inertia force during the door side collision. The object is to provide a door latch for a vehicle having a backup lever.

The present invention for achieving the above object is equipped with a backup lever around the handle lever of the door latch assembly interlocking with the outside handle, but by restoring the original position by the elastic force of the return spring, the inertial force during the door collision This action provides a door latch for a vehicle having a backup lever, characterized in that the handle lever interlocking with the outside handle can be prevented from being rotated to the open position.

In a preferred embodiment, the upper end of the handle lever is characterized in that the locking end is integrally formed to the backup lever.

In a more preferred embodiment, the backup lever is formed on the bottom of the rotating shaft is mounted around the handle lever of the door latch assembly, the upper end side is formed integrally protruding constraining end restraining the locking end of the handle lever, the top end Characterized in that the structure is provided with a spring fixing groove for mounting the return spring.

In addition, the upper end of the return spring is fixed by being fitted into the spring fixing groove, the lower end is wound around the rotating shaft several times, characterized in that fixed to a predetermined position of the door latch assembly.

Through the above problem solving means, the present invention provides the following effects.

According to the present invention, the inertia force at the side of the door side acts and the outside handle is flipped in the opening direction, and the handle lever interlocking with the outside handle is rotated to the open position. In order to prevent the door from being opened due to the inertia force at the side of the door, it is possible to further improve the safety of the driver and passengers.

In addition, the present invention can improve the design freedom of the outside handle by applying the backup lever to the door latch assembly, by eliminating the balance weight or the backup lever conventionally applied directly to the outside handle.

1 is a front view showing that the backup lever of the door latch for a vehicle according to the present invention is installed and placed in a normal position before operation;
2a and 2b is a front view and a perspective view showing a state in which the backup lever of the vehicle door latch is installed and the normal operating state of the handle lever according to the present invention;
3A and 3B are front and perspective views showing an operation state of a backup lever of a door latch for an automobile according to the present invention, in which a handle lever is momentarily rotated to an open position of a door when an inertial force is applied due to a collision;
4A and 4B are schematic views for explaining that a conventional weight is provided with a balance weight and a backup lever is mounted;

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

The present invention focuses on installing a backup lever on the door latch assembly that prevents the door from being opened at the same time the outside handle is retracted in the opening direction due to the inertia force acting on the door when the side of the vehicle door collides. have.

1 is a front view illustrating a state in which a backup lever of a door latch for a vehicle according to the present invention is installed, and FIGS. 2A and 2B illustrate a state in which a backup lever of a vehicle door latch is installed and a normal operation of a handle lever. It is a front view and a perspective view which show a state.

The main components of the door latch assembly 12 are installed to be interlocked with each other inside and outside of the door latch case. As one of the configurations, the handle lever 14 interlocking with the outside handle 10 of the door can rotate. To the side of the handle lever 14, an open lever (not shown) for door opening operation is mounted to be rotatable.

More specifically, a slot 17 is formed at one end of the handle lever 14, the other end is connected to an open lever for door opening operation, and a lower end of the rod 18 in the slot 17. This insert is fastened, and the upper end of the rod 18 is connected to the outside handle 10 to be interlocked.

In particular, according to the present invention, the backup lever 20 is mounted around the handle lever 14 of the door latch assembly 12 which interworks with the outside handle 10 and the rod 18.

The backup lever 20 is mounted to be restored to its original position by the elastic force of the return spring 16, and the inertia force during the door collision acts so that the handle lever 14 interlocked with the outside handle 10 is opened. This prevents the door from opening by blocking the momentary turning.

On the other hand, the upper end of the handle lever 14, the locking end 15 is formed integrally protruding bar, when the backup lever 20 is rotated by the inertial force during the door collision, substantially the backup lever 20 is engaged The part 15 is blocked, so that the handle lever 14 does not rotate to the open position.

Looking at the structure of the backup lever 20, the lower end is formed with a rotating shaft 22 which is mounted around the handle lever 14 of the door latch assembly 12, the upper end side of the locking lever (14) The constraining end 24 which blocks and constrains 15) is formed to protrude integrally, and at the top end thereof, a spring fixing groove 26 for mounting the return spring 16 is formed.

At this time, one end of the return spring 16 is fixed to the spring fixing groove 26, the other end is wound several times on the pivot shaft 22 of the backup lever 20, the door of the door latch assembly 12 It is fixed to the predetermined position of the latch case 13.

Here, the process of opening the door in the state in which the backup lever is mounted on the door latch assembly as described above is as follows.

Steady state (no inertia)

When the driver or the passenger flips the outside handle 10 in the open direction, the rod 18 descends and simultaneously pushes the handle lever 14 downward.

That is, when the lower end of the rod 18 moves to the bottom of the slot 17 section of the handle lever 14 to push down one end of the handle lever 14, one side end of the handle lever is a hinge point of the other end. Each turn is made around the point connected to the open lever.

At the same time, when the handle lever 14 rotates, the open lever (not shown) connected to the other end of the handle lever 14 also rotates in the door opening direction, thereby opening the door.

At this time, since the backup lever 20 does not exist in the rotational trajectory of the handle lever 14, the handle lever 14 is normally rotated during the door opening operation.

Door collision state (inertial force action)

3A and 3B are front and perspective views illustrating a state in which the backup lever according to the present invention prevents the handle lever from momentarily rotating to the door open position when an inertial force is applied by a door collision.

When the door side impact, when the impact is applied to the door in the direction of opening the door, the backup lever 20 installed in the door latch assembly 12 receives a rotation moment due to its own weight.

Therefore, when the inertia force is applied to 10g or more, the rotation moment is greater than the elastic force of the return spring 16 supporting the backup lever 20, the backup lever 20 is rotated toward the handle lever 14 eventually It is moved into the operation trajectory of the handle lever 14.

In particular, when the inertia force is 30g or more during the door side collision, the outside handle 10 is operated in the opening direction by its own weight, so that the handle lever 14 connected to the rod 18 also rotates in the door opening direction. do.

However, since the backup lever 20 has already been moved into the operating trajectory of the handle lever 14, the backup lever 20 and the handle lever 14 are in contact with each other and interfere with each other, so that the handle lever 14 can no longer move. And the door will not open.

More specifically, in the state where the backup lever 20 is moved within the operating trajectory of the handle lever 14, the restraint end 24 of the backup lever 20 is connected to the engaging end 15 of the handle lever 14. By the restrained state of the handle lever 14 supporting the bottom, the handle lever 14 subjected to the inertia force is no longer angularly rotated in the door opening direction, and thus the door opening phenomenon due to the inertia force during the door side collision. This can be easily prevented from occurring.

On the other hand, when the impact applied to the door is removed, the backup lever 20 is returned to the initial position by the elastic restoring force of the return spring 16, and at the same time the handle lever 14 is in a normal operating state.

According to the present invention as described above, by applying the backup lever structure to the handle lever adjacent position of the door latch assembly, it is more compact, weight reduction and cost reduction compared to the conventional method of mounting the backup lever or the balance weight on the outside handle In addition, the reliability of durability and weather resistance of the backup lever can be improved by preventing damage caused by contact with external components and preventing inflow of dust and water.

In addition, since the separate backup lever or balance weight component is removed from the outside handle, it is possible to design the spring centered on the operating force without additional consideration of the inertia resistance when designing the outside handle component. You can get it.

10: outside handle 12: door latch assembly
13: door latch case 14: handle lever
15: hang step 17: slot
16: return spring 18: load
20: backup lever 22: rotation axis
24: restraint end 26: spring fixing groove
30: balance weight 40: backup lever

Claims (4)

The backup lever 20 is mounted around the handle lever 14 of the door latch assembly 12 that interlocks with the outside handle 10, but is resiliently mounted to the original position by the elastic force of the return spring 16. The door latch for a vehicle having a backup lever, characterized in that the inertia force in the event of a door collision acts to prevent the handle lever 14 interlocking with the outside handle 10 from being momentarily rotated to the open position.
The method according to claim 1,
The door latch for the vehicle having a backup lever, characterized in that the upper end of the handle lever 14, the engaging end 15 is caught integrally formed to be integrally projected to the backup lever 20.
The method according to claim 1 or 2,
The backup lever 20 has a rotation shaft 22 mounted at a lower end of the door latch assembly 12 around the handle lever 14, and a locking end 15 of the handle lever 14 is constrained at one end of the door lever assembly 12. Constrained end 24 is formed integrally projecting, the upper end is a door latch for a vehicle having a backup lever, characterized in that it is provided with a structure formed with a spring fixing groove 26 for mounting the return spring (16).
The method according to claim 3,
One end of the return spring 16 is inserted into the spring fixing groove 26 and fixed, and the other end is wound around the rotating shaft 22 several times, and then fixed to a predetermined position of the door latch assembly 12. Automotive door latch with backup lever.

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