JPH0444780Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is used to minimize abnormal noises such as metallic sounds generated between the latch and the base, and to enable quiet door opening and closing.

2. Description of the Related Art As shown in FIGS. 9 and 10, an automobile door lock has a latch 1, which cooperates with a ball (not shown), rotatably supported on a base 3 using a pin 2. The pin 2 is fixed to the base 3, but the pin 2 is attached to the stepped portion 4.
, so that the latch 1 is held between the base 3 and the step 4. In this case, the gap between the pin 2 and the pin insertion hole of the latch 1 and the gap between the base 3 and the latch 1 allow the latch 1 to move freely relative to the base 3 and the pin 2, allowing the door to open and close. When metal objects collide with each other, an abnormal noise occurs. For this reason,
A silencer 5 is disposed on the latch 1. The silencer 5 has a spacer part 6 and a leaf spring part 7, the spacer part 6 is inserted into the pin insertion hole of the latch 1, and the leaf spring part 7 is interposed between the base 3 and the latch 1, The latch 1 is brought into resilient contact with the step 4 of the pin 2. In this conventional example, the spacer portion 6
suppresses the movement of the latch 1 in the radial direction around the pin 2, and the leaf spring portion 7 suppresses the collision of the latch 1 with the base 3, thereby minimizing the generation of abnormal noise when the door is opened and closed.

Problems to be solved by the present invention In the conventional example described above, latch 1 and base 3
In order to minimize the generation of abnormal noise due to contact with the plate spring portion 7, the spring force of the leaf spring portion 7 is necessarily large. However, if a large spring force is constantly acting on the latch 1, although the generation of abnormal noise can be minimized, the rotation of the latch 1 will be resisted in its entire range, and when the door is fully closed, If you open the door from
Stay in the middle position. This interferes with the door lock and poses a problem for safe driving of the vehicle.

SUMMARY OF THE INVENTION Therefore, the problem to be solved by the present invention is to provide a door lock for a motor vehicle which minimizes noise generation and ensures return of the latch to its initial position.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention
An arc-shaped protrusion around the pin is provided on either the silencer provided on the latch or the base,
The other protrusion is provided with a protrusion that can overlap with the protrusion, and a technical means is adopted in which the two protrusions overlap so as to force the latch away from the base when the door is fully closed.

Function When the door is fully closed, both protrusions overlap, forcing the latch away from the base, and there is no contact between the latch and the base. When the door is opened, the two protrusions do not overlap, and the latch reliably returns to its initial position.

EXAMPLE Referring to FIG. The base 9 is provided with a notch 10 into which the striker is inserted and a pin hole 11, and an arcuate first protrusion 12 (see FIG. 2) is provided on the circumference around the pin hole 11. Silencer 1 made of synthetic resin by insert molding on latch 13
4 is provided, and a second upward protrusion 15 is provided on the upper surface of this silencer 14. The second protrusion 15 is
It is located on the circumference centered on the pin insertion hole 16 of the latch 13, and has a wedge-shaped cross section as shown in FIG. As shown in FIG. 1, the pin 2 has a stepped portion 4, and the pin 2 is passed through the pin insertion hole 16 of the latch 13, and the pin 2 is caulked to the base 9, and the latch 13 is rotated to the base 9 via the pin 2. Support freely.

FIG. 3 shows the striker 17 located near the notch 10 of the base 9, with the door open. In this case, the return spring 18 returns the latch 13 to its initial position, and both protrusions 12, 15 are spaced apart from each other, although on the same circumference. When the door is closed from the state shown in FIG. 3, the striker 17 enters the notch 10 of the latch 13, and while rotating the latch 13, the striker 17 is sent into the notch 10, and the door is fully closed as shown in FIG. make. Before the door is fully closed, the wedge-shaped inclined surface of the second protrusion 15 is wedged into the first protrusion 12, and as the latch 13 rotates, both protrusions 12 and 15 are completely closed as shown in FIG. The latch 13 is forced downward, and there is no collision between the latch 13 and the base 9. At this time, the lower surface of the latch 13 is pressed against the flange 4 of the pin 2.

When the door is opened from the state shown in FIG. 4, the striker 17 moves along the notch 10 of the base 9, and eventually the overlapping projections 12 and 15 are released, and the maximum resistance between the base 9 and the latch 13 is achieved. , and the spring force of the return spring 18 acts on the latch 13 to its maximum extent, ensuring that the latch 13 returns to its initial position.

The example shown in FIG. 6 is a different type of silencer 14' from the example shown in FIG. 1 and is provided with a second protrusion 15, and has exactly the same effect as the example shown in FIGS. 1-5.

In the example shown in FIGS. 7-8, a second protrusion 15' is provided on the edge of the silencer 14'' provided on the latch 13,
The first protrusion 12 of the base 9 is arranged on the same circumference as this protrusion 15'. This protrusion 15'
It is preferable to make a depression 19 at the root of the protrusion 15' to increase the elasticity of the protrusion 15'. This example also has the same effect as the example of Figures 1-5.

In addition, the silencer 14 and the protrusions 15, 1 of the base 9
The two shapes may be interchanged.

Effects According to the present invention, the overlapping of the protrusions on either one of the silencer and the base with the protrusions on the other occurs near the front of the fully closed door, so it does not suddenly cause a feeling of resistance to the person closing the door. , it does not worsen the feeling when opening and closing the door.

[Brief explanation of the drawing]

Figure 1 is an exploded view of an example of the present invention, and Figure 2 is an exploded view of an example of the present invention.
3 is a plan view when the door is open, 4 is a plan view when the door is fully closed, and 5
The figure is a sectional view taken from the direction of the arrow in Fig. 4, Fig. 6 is a perspective view of another example, Fig. 7 is a plan view of another example, and Fig. 8 is a sectional view taken from the direction of the arrow of Fig. 7. Figure, No. 9
The figure is a perspective view of a conventional example, and FIG. 10 is a sectional view showing an assembled state. In the figure, 9...Base, 12, 15...Protrusion, 1
3... Latch, 14... Silencer, 17...
striker.

Claims (1)

[Scope of utility model registration request] In an automobile door lock that engages and detaches a striker fixed to a vehicle body side and a latch rotatably supported on a door side base via a pin, a silencer provided on the latch and a protrusion that can overlap with each other on the base. A door lock for an automobile, characterized in that at least one of the protrusions is an arc-shaped protrusion around the pin, and both protrusions overlap so as to force the latch away from the base when the door is fully closed. .