JPS6019877Y2 - door latch device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a door latch device for automobiles, etc.

Regarding door latch devices, for example,
Various structures have been devised as shown in the patent application No. 778, and an example of a general door latch device will be explained with reference to FIG. 1 as follows.

The latch base 1 is attached to the door and moves and engages, while the striker 2 is attached to the vehicle body and remains stationary.
For convenience of explanation, it is assumed here that the latch base 1 is relatively stationary and the striker 2 enters and engages from the right position 2' to the left position 2''.

Latch base 1 includes base plate 3 and cover plate 4
A pin 5 is hooked between both plates to support a claw 6, and the claw 6 is attached by a spring (not shown) so as to rotate in the direction P around the pin 5. Forced.

In addition, a pin 7 is hung between both plates to support a detent lever 8, and the detent lever 8 is supported by a spring 9 (
(shown in FIG. 2), it is urged to rotate in the Q direction around the pin 7.

Striker 2 is initially at position 2', and claw 6 is at position P.
By being biased in this direction, the insertion portion 6a opens toward the lower right so as to receive the striker 2'.

When the striker 2 enters the entrance i4a provided in the cover plate 4 from 2' to 2'' for engagement, it pushes the wall 6b of the insertion part 6a, so the claw 6 resists the bias. and rotate in the opposite direction to P.

On the other hand, the detent lever 8 is always in pressure contact with the periphery of the claw 6 due to the bias of the spring 9, and when the striker reaches the 2''p position (door closing position), the claw portion 6 of the claw 6
c and the hook portion 8a of the detent lever 8 mesh with each other.

Since the claw 6 is biased to rotate in the P direction and the detent lever 8 is biased to rotate in the Q direction, this engagement will not come off.

Therefore, the insertion portion 6a firmly holds the striker at the 2'' position.

To release this engagement, a cable or rod (not shown) connected to the end 8b of the detent lever 8 may be operated to pull down the end 8b in the R direction.

By doing this, the hook portion 8a will come off from the claw portion 6C, and the claw 6 will be
The striker 2 is rotated by the bias in the direction to push the striker 2 from the 2'' position toward 2' and release the engagement.

Now, when the striker 2 moves within the entry groove 4a of the cover plate 4 and engages with the claw 6, it is slid against a sliding piece 10 made of plastic material to prevent the claw 6 from rattling. .

The sliding piece 10 is provided inside the base plate 3 along the advancing direction of the striker 2, and a conventional example thereof is shown in FIG.

That is, the sliding piece 10 has its bearing hole 10
A support pin 11 that is hooked to the base plate 3 is inserted along the advancing direction of the striker 2, and a coil spring 12 wound around the supporting pin 11 moves the sliding piece 10 in the opening direction of the advancing groove 4a. It is designed to be energized.

The upper surface 10b of the sliding piece 10 has a striker 2
The striker is formed in an upward slope with respect to the direction of approach, and when the striker enters the position from 2' to 2'', it slides on the upper surface 10b.

The sliding piece 10 can move along the support pin 11, but since it is biased by the coil spring 12 in the opening direction of the entry i4a, the upper surface 10b comes into moderate pressure contact with the striker 2 to prevent the claw 6 from rattling.

In this structure, the edge 6d of the claw 6 is the lower edge 4b of the sliding piece 10 and the entry groove 4a of the cover plate 4.
Because of this, when an impact is applied to the claw 6 in the S direction via the latch base 1 or the striker 2, the edge 6d of the claw 6
b, deforming the lower edge 4b and eventually making it impossible to open or close the door.

To prevent this, cover plate 4 and base plate 3
No effect can be expected even if the welded connection is strengthened.

The present invention was devised to prevent the occurrence of such problems, and its structure will now be explained with reference to the embodiments shown in FIGS. 3 and 4.

The sliding piece 13 made of plastic material has a U-shaped cross section, and has two parallel support holes 13.
Support pins 11 and 11, which are hooked to the base plate 3 along the advancing direction of the striker 2, are inserted through the holes a and 13a, and as in the case of FIG.
The coil spring 12 wound around the sliding piece 13 urges the sliding piece 13 in the opening direction of the entry groove 4a.

The mouth surface 13c of the opposing wall portion 13b of the sliding piece 13, which is formed in a U-shaped cross-section, is formed in an upward slope with respect to the direction in which the striker 2 enters. It comes to slide on the mouth surface 13c.

Then, the mouth surface 13c is appropriately pressed against the striker 2 by the bias of the coil spring 12, thereby preventing the claw 6 from rattling.

Then, the claw 6 is inserted into the recess 13d between the opposing walls 13b.
The outer surface 13e of one wall 13b is in contact with the lower edge 4b of the entrance groove 4a of the cover plate 4.

Therefore, when an impact is applied to the claw 6 in the S direction via the latch base 1 or the striker 2, the edge 6d of the claw 6 hits the inner surface of the wall 13b, and as a result, the outer surface 13
e hits the lower edge 4b of the cover plate 4, but the flexible lower edge 4b, which is a wide area of contact between surfaces, does not deform and does not interfere with the opening and closing of the door. It doesn't happen.

As mentioned above, the sliding piece according to the present invention has the feature of preventing the deformation of the cover plate that is in contact with the sliding piece using the outer surface of the wall, but it is also possible to prevent the claw from changing by adjusting the width of the recess of the U-shaped cross section. It is possible to prevent rattling with the edge, and as shown in FIG.
If f is sloped, it is possible to drain rainwater that has entered.

Furthermore, since the overall width of the sliding piece is increased, two parallel support holes can be provided, which has the advantage of preventing the sliding piece from falling over.

[Brief explanation of drawings]

Fig. 1 is a front view of the door latch device, Fig. 2 is a sectional view taken along line A-A in Fig. 1 showing the structure of a conventional example, and Fig. 3 is Fig. 1 A-A showing the structure of an embodiment of the present invention. FIG. 4 is a front view showing an embodiment of the groove bottom surface of the sliding piece according to the present invention. 1...Latch base, 2,2'...Striker, 3...◆Base plate, 4...
...Cover plate, 4a...Entry groove, 4b.
...Lower edge, 5...Pin, 6...
Claw, 6a...Insertion part, 6b...Wall part, 6c...Claw part, 6d...Edge part, 7
... Zen, 8 ... Detent lever, 8
a...Hook part, 8b...End part, 9...
...Spring, 10...Sliding piece,
lea...Bearing hole, 10b...Top surface,
11...Support pin, 12...Coil spring, 13...Sliding piece, 13a.
...Support hole, 13b...Wall part, 13c.
... Mouth surface, 13e ... External surface. 13d... recess,

Claims (1)

[Scope of utility model registration request] A sliding piece is installed in the latch base along the entry groove of the striker provided in the cover plate forming the latch, and slides with the striker as the striker enters. A door latch for an automobile, etc., characterized in that the insertion portion is an insertion portion, the mouth surface of the opposing wall portion is the sliding surface of the striker, and the outer surface of one of the walls is in contact with the cover plate. Device.