JPS6140857Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a door latch device for an automobile.

A door latch device for an automobile basically consists of a claw that is fixed to a vehicle body pillar and that locks a door striker, and a date lever that engages with the claw of the claw to maintain the door striker locked state, that is, the latched state. When the door is closed, the door striker hits and presses one side edge of the claw's locking groove, causing the claw to rotate and fit into the locking groove, and in this state, the datetent lever engages the claw of the claw. The door striker is configured to engage with the claw to prevent rotation of the claw and maintain the door striker locking state of the claw (see, for example, Japanese Utility Model Publication No. 55-45005).

In the door latch device as described above, when the door striker is locked in the claw, there is a relative change in the contact surface between the door striker and the locking groove of the claw that locks it during travel, and the contact surface changes. It has the problem that it rubs and makes an abnormal noise (squeaking noise).

The main purpose of the present invention is to prevent the generation of abnormal noises as described above, and the embodiments thereof will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a claw which has a locking groove 1a for locking a door striker and claws 1b and 1b' with which a detent lever 2 is engaged, respectively, on its outer peripheral surface, and the claw 1 and detent lever 2 are made of synthetic resin. It is rotatably attached to a base 5 made of a commercially available manufacturer by means of shafts 3 and 4, respectively.

Although not shown, upper and lower metal plates are superimposed on the front and back surfaces of the synthetic resin base 5, and the shafts 3 and 4 pass through the synthetic resin base 5 and connect both ends to the upper and lower metal plates. It is caulked and fixed to the lower plate.

A guide groove 11 is formed in the synthetic resin base 5, into which the door striker 7 protruding from the vehicle body pillar part enters when the door is closed. Fins 12, 12 are integrally formed to project obliquely toward the back so as to gradually contract.

At the inner end of the guide groove 11 is a stopper 6 made of an elastic material such as rubber, with which the door striker 7 comes into elastic contact.
However, in the present invention, the stopper 6 is provided with a striker contact portion 61 that fits between the fin portions 12 and protrudes toward the guide groove 11, and a striker contact portion 61 that fits between the fin portions 12, 12 and projects toward the guide groove 11, and the fin portion 1.
Wedge-shaped parts 62, 62 fitted to the back parts of 2, 12
and a pin-shaped stopper portion 1c protruding from the claw 1.
is integrally formed with a claw stop contact portion 63 that comes into contact with the claw 1 in the unlatched position, and is fitted and attached to the synthetic resin base 5.

In the above, when the claw 1 is in the unlatched state shown by the chain line, the stopper part 1c hits the claw stopper contact part 63 of the stopper 6, and the locking groove 1a of the claw 1 is directed toward the entrance of the guide groove 11 of the base 5. One side edge 1a' of the locking groove 1a is held at a position facing approximately the center of the guide groove 11.

From this state, when the door is closed and the door striker 7 enters the guide groove 11 in the direction of arrow A, the door striker 7 hits one side edge 1a' of the locking groove 1a and presses it, causing the claw 1 While rotating clockwise in the figure, it moves further into the guide groove 11, hits the fins 12, 12, spreads them out, hits the striker contact part 61 of the stopper 6, compresses and deforms it, and stops.

At this time, as shown by the solid line in the figure, the door striker 7 is engaged in the locking groove 1a of the claw 1, and the detent lever 2 is engaged with the claw portion 1b of the claw 1, so that the door striker of the claw 1 is locked. is held and becomes latched.

In the above operation, when the door striker 7 hits the fins 12, 12 and tries to spread them apart, a stopper 6 is provided on the back side of the fins 12, 12.
Since the wedge-shaped parts 62, 62 are fitted, the wedge-shaped parts 62, 62 are compressed and deformed to form the fin parts 12, 1.
Even if the vertical position of the door striker 7 is somewhat relatively displaced due to the door going up or down while the doors are being pushed apart and moving forward, it is corrected and the door striker 7 is always engaged at the normal position.

Furthermore, even if the door striker 7 comes off and hits the tip of the striker contact portion 61 of the stopper 6, both sides are firmly held by the fins 12, 12, thereby preventing damage to the contact surface. It is possible to maintain stable stopper function over a long period of time.

Furthermore, in the above-mentioned latched state, the back wedge-shaped portion 62,
Due to the fins 12, 12 elastically supported by the fins 12, 12 and the striker abutting portions 61 firmly held on both sides by the fins 12, 12, the door striker 7 is strongly pushed to the side of the locking groove 1a of the claw 1. Door striker 7 while the vehicle is running because it is pressed against the edge.
Relative fluctuations between the claw 1 and the claw 1 and the generation of rubbing sounds (grinding sounds) caused by the fluctuations are almost completely prevented.

When the detent lever 2 is rotated counterclockwise in the figure to release the engagement with the claw portion 1b of the claw 1, the claw 1 is rotated counterclockwise in the figure by a return spring (not shown), and the door striker 7 comes out. together with the stopper part 1c of the claw 1
comes into contact with the close stopper abutting portion 63 of the stopper 6, resulting in an unlatched state.

At this time, the stopper part 1c of the claw 1 hits against the close stopper contact part 63 of the stopper 6 made of an elastic material, thereby reducing the impact noise and preventing collision vibration of the stopper 1c of the claw 1. Now, the vibration in the axial direction of the claw 1 and the resulting metallic sound (chiring sound) between the claw 1 and the lower plate covering the claw 1 are almost completely prevented.

As described above, according to the present invention, the combination of the fin provided in the guide groove of the door striker and the stopper made of an elastic material such as rubber that is integrally formed into a special shape prevents abnormal noises while driving and prevents latch release noise. In addition to this, it is possible to significantly reduce costs by eliminating the conventionally required slide piece for keeping the door striker in the locked state and by integrating the stopper, which has a great practical effect. It's something you get.

[Brief explanation of drawings]

The accompanying drawing is a front view of a main part showing an embodiment of the present invention. 1... Claw, 1a... Locking groove, 1b, 1b'...
...Claw, 1c...Stopper part, 2...Detent lever, 3, 4...Shaft, 5...Synthetic resin base,
6...Stoppa, 7...Door strike, 11...
...Guide groove, 12...Fin part, 61...Striker contact part, 62...Wedge-shaped part, 63...Close stopper contact part.

Claims (1)

[Scope of utility model registration request] In a latch device in which a claw and a detent lever that engages with the pawl of the claw are rotatably attached to a synthetic resin base, the latch device is attached to the inner part of the guide groove for guiding door striker entry in the synthetic resin base. In order to gradually reduce the width of the guide groove, fins protruding from both sides of the guide groove toward the back are integrally formed, and a striker contact part that fits into the fin and projects in the direction of the guide groove, and a rear surface of the fin are provided. A stopper integrally formed of an elastic material such as rubber is attached to the above-mentioned synthetic resin base so that the wedge-shaped part to be fitted and the stopper part provided on the claw come into contact and have a close stopper contacting part for regulating the unlatched position of the claw. An automobile door latch device characterized by: