JPH0711265Y2 - Door lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a door lock device, and more particularly to a resin mold type door lock device applied to a door such as a side door or a back door of an automobile.

[Prior Art] As a conventional door lock device of this type, one shown in FIG. 4 is known. In this device, a resin body 2 is fixed to a metal base plate 1, and a cover 3 having an embossed portion 3A is fixed to the end surface of the body 2. The body 2 including the base plate 1 and the embossed portion 3A of the cover 3 support the shaft 5 for supporting the latch 4. The embossed portion 3A is bulged in a direction facing the body 2, and the end portion of the shaft 5 is located in the recessed portion on the right side in FIG. 4 of the embossed portion 3A. Does not protrude from the outer surface of the cover 3 so that the door lock device can be easily mounted.

Further, the latch 4 includes a fitting hole for the shaft 5, and a resin 6 is molded on the surface of the fitting hole.
Metal contact with the cover 3, striker (not shown), etc. is prevented to improve the door closing sound performance.

[Problems to be Solved by the Invention] However, in the above-described conventional door lock device, although the effect of improving the sound performance can be obtained by avoiding contact between metals, on the contrary, the portion where the resin intervenes Since it does not work as a strength member, there is a problem that the engagement strength between the latch and the striker is reduced.

When trying to secure the strength, there is also a problem that the entire size becomes large in order to secure a sufficient resin space.

An object of the present invention is to provide a door lock device that solves such a problem and can improve the door closing sound performance without reducing the meshing strength of the door lock.

[Means for Solving the Problems] In order to achieve the above object, a door lock device of the present invention includes a body and an embossed portion that is fixed to the body and bulges in a direction opposite to the body. A cover, a shaft supported between an embossed portion of the cover and a portion of the body facing the embossed portion, and a latch rotatably supported by the shaft and having a surface molded with resin. In the door lock device, the resin is such that a portion facing the top of the embossed portion is removed, and an annular rib that is in contact with the surface of the cover located outside the top of the embossed portion is formed. Characterize.

[Operation] According to the present invention, the resin annular rib molded on the surface of the latch contacts the cover outside the embossed portion.

Therefore, the thickness of the latch can be increased without contact between the latch and the embossed portion of the cover, so that the meshing strength is not reduced and the door closing sound performance is also improved.

Also, since the tilt of the latch is prevented during operation,
The lock operation is performed smoothly.

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

1 and 2 show an embodiment of the present invention.

Here, 10 is a door lock device main body, and 11 is a resin body, which is fixed to the base plate 11A. Reference numeral 12 denotes a cover fixed to the end surface of the body 11, and has an embossed portion 12A that bulges leftward in FIG. Reference numeral 13 is a guide groove provided in the body 11 and the cover 12, and 14 is a striker which is introduced into the guide groove 13 from the direction of the arrow when the door is closed and used for locking the door. Further, reference numeral 15 is a bifurcated latch rotatably supported around a shaft 16 supported by the body 11 including the base plate 11A and the embossed portion 12A of the cover 12, and a resin 17 is partially formed on the surface thereof. Is molded. The latch 15 is biased counterclockwise by the spring force of the spring 18, but when the door is locked as shown in this figure, the drive arm 15A of the latch 15 is pushed by the striker 14 and the latch 15 is rotated clockwise. By rotating the striker 14 in the direction, the striker 14 is guided to the bifurcated engaging portion 15B of the latch 15.

Reference numeral 19 denotes a locking claw that is rotatably held by a shaft 20 and is urged clockwise by a spring force of a spring 21, and locks when the latch 15 is rotated as shown in this figure. Arm 15C
With the tip of the rod crossing over the locking claw 19, it is locked to maintain that state. Reference numeral 22 is a wedge bumper that is biased to the right by a spring (not shown) to restrain the striker 14 in the vertical direction, and 23 is a shock absorber of the striker 14.

For the resin 17 that is partially molded on the surface of the latch 15,
An annular rib 17A is formed around the shaft 16,
The annular rib 17A contacts the cover 12 outside the embossed portion 12A. The height of this annular rib 17A is
The size is set so that the and the embossed portion 12 do not come into contact with each other.
Further, as is apparent from FIG. 2, the embossed portion 12A
The portion of the resin 17 facing the top portion on the left side in the figure is removed, and the resin 17 is not interposed between the top surface of the embossed portion 12A and the facing surface of the latch 15. Then, as shown in FIG. 2, the annular rib 17A contacts the surface on the left side in the figure of the cover 12 located outside the top of the embossed portion 12A, and the embossed portion 12A and the latch 15 contact as described above. It is supposed not to.

Further, on the latch surface opposite to the side where the annular rib 17A is formed, there is a portion where the resin is not molded in an annular shape, and the boss portion 11B formed on the body 11 is located in this portion. The upper surface of the boss portion 11B can come into contact with the metal latch 15.

The lock operation of the door lock device configured as described above will be described with reference to FIG.

First, when the striker 14 located on the right side is introduced into the guide groove 13, the drive arm 15A of the latch 15 is pushed by the striker 14 to rotate clockwise, and the striker 14
Are taken into the engaging portion 15B of the latch 15. From this state, when further pushing into the guide groove 13, that is, to the left,
The striker 14 slides on the wedge surface of the wedge bumper 22 to move the wedge bumper 10 leftward against the spring force. At this time, the striker 14 collides with the shock absorber 23, and thus the striker 14 is engaged with the engaging portion 15 as shown in FIG.
When B is completely restrained by the wedge surface of the wedge bumper 10 and the buffer 23, the locking arm 15C of the latch 15 is locked by the locking claw 19 and locked.

At the time of the above locking operation, the latch 15 slides the annular rib 17A of the resin 17 outside the embossed portion 12A of the cover 12 without contact between the metal cover 12 and the metal members,
Rotate around the shaft 15.

Therefore, the thickness of the latch 15, which is a strength member, can be increased by the thickness of the resin conventionally interposed between the latch 15, the cover 12, and the embossed portion 12A, and the meshing strength can be improved. The end of the shaft 16 supported by the embossed portion 12A is
Since the embossed portion 12A is located in the recessed portion on the right side in FIG. 2, the end portion of the shaft 16 is, as shown in FIG.
Embossed part 12A without protruding from the outer surface of cover 12
It will be possible to firmly support by crimping. This is extremely advantageous in mounting the present door lock device. Thus, the embossed portion 12A has a function of preventing the end portion of the shaft 16 fixedly supported by the embossed portion 12A from protruding from the outer surface of the cover 12. Also, the embossed section
By not interposing the resin 17 between the facing surfaces of the top of the 12A and the latch 15, and by making the annular rib 17 of the resin 17 avoid the top of the embossed portion 12A and contact the inner surface of the cover 12 located outside thereof. Therefore, the enlargement of the shaft 16 of the door lock device in the longitudinal direction due to the bulge of the embossed portion 12A can be suppressed.

After all, the end of the shaft 16 does not project to the surface side of the cover 12 to ensure the mountability of the door lock device, and the resin 17 is interposed between the contact surfaces of the cover 12 and the latch 15 to make the door lockable. Ensuring that the closing sound performance of the
Since the resin 17 is not interposed between the top of the 12A and the latch 15, the latch 15 is sufficiently strong while suppressing the thickness of the door lock device in the left-right direction in FIG. The thickness can be set.

Next, another embodiment of the present invention will be described with reference to FIG.

In this embodiment, a resin annular rib is formed in a step shape,
It is characterized in that the annular rib 17B on the inside thereof is brought into contact with the outer peripheral surface of the embossed portion 12A.

In this way, the latch 15 and the cover 12 form an annular rib.
The sliding of the end surface of 17A ensures the clearance between the latch 15 and the embossed portion 12A, and the sliding of the inner annular rib 17B and the outer peripheral surface of the embossed portion 12A allows the latch 15 and the shaft 16 to slide. It is possible to reduce the occurrence of abnormal noise due to rattling.

Also, although not clear in FIGS. 1 and 2,
The end surface of the annular rib 17A has a wavy shape or an uneven shape,
The end face is not in full contact with the cover 12 and is in partial contact.

Thus, the sliding resistance at the time of rotating the latch 15 is reduced so that the locking operation is performed smoothly.

[Effects of the Invention] As is clear from the above description, according to the present invention, it is not necessary to secure a space for the resin thickness as in the conventional case, and therefore it is not necessary to reduce the plate thickness of the latch. The door closing sound performance can be improved without reducing the meshing strength of the door lock.

When the strength is satisfied, the space can be reduced in size as a whole.

Particularly, in the present invention, the end portion of the shaft supported by the embossed portion of the cover does not project to the surface side of the cover to ensure the mountability of the door lock device, and further, between the contact surfaces of the cover and the latch. In addition to ensuring the improvement of door closing sound performance by interposing resin, the resin is not interposed between the top of the embossed part and the latch, so the thickness of the door lock device in the longitudinal direction of the shaft is suppressed and the latch is The thickness can be set to have a sufficient strength.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a sectional view showing another embodiment of the present invention, and FIG. It is sectional drawing which shows a prior art example. 11 …… Body, 12 …… Cover, 12A …… Embossed part, 15
...... Latch, 16 …… Shaft, 17 …… Resin mold, 17
A …… annular rib, 17B …… inner annular rib.

Claims (1)

[Scope of utility model registration request] 1. A body, a cover fixed to the body and having an embossed portion that bulges in a direction facing the body, an embossed portion of the cover, and a portion of the body facing the embossed portion. A door supported by a shaft supported between the shaft and a latch, the surface of which is rotatably supported by the shaft and whose surface is molded with a resin. And a ring-shaped rib that is in contact with the surface of the cover that is located outside the top of the embossed portion.