JPS6149471B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a door lock with a door opening/closing detection switch for an automobile used in a passive belt system (a system in which a seat belt restrains an occupant regardless of the occupant's will when the door is closed).

In a conventional door lock of this type, a rotary switch 3 is disposed coaxially with the rotating shaft 2 of the latch 1, as shown in FIGS. 1 and 2, to detect the opening and closing of the door. In the figure, 4 is a return spring, 5 is a cover attached to the main body 6 and covers the latch mechanism, and the main body 6 is adapted to be attached to a door panel (not shown). Figure 2 is a split view showing the latch 1 and rotary switch 3 separated, with the protrusion 7 on the rotary switch side facing the rotation shaft 2.
When the latch 1 rotates, the rotary switch 3 is activated to detect whether the door is opened or closed.

However, with the conventional door closing detection mechanism as described above, if the door is deformed due to a vehicle collision, etc., there is an inconvenience in sending a signal to open the door even though the door is closed. The drawback of the system was that the seat belt automatically detached from the occupant.

In addition, in the conventional mechanism shown in Fig. 1, the rotary switch is arranged in the extending direction of the latch rotation shaft 2, so the thickness of the door lock becomes thicker, which inevitably increases the thickness of the door. Since the rotary switch is placed in a certain position, the door becomes thicker. Furthermore, since the rotary switch 3 was disposed outside the door lock mechanism and was exposed, there were problems in terms of waterproofing and dustproofing.

The present invention was proposed in order to solve the above-mentioned conventional drawbacks, and by disposing a door close detection mechanism in the door lock mechanism, it is possible to reduce the thickness of the door lock and reduce the uncertainty of detection. To provide a door lock with a door opening/closing detection switch for an automobile, which can easily and completely achieve waterproof and dustproof effects while eliminating the above problems.

Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 3 to 7, 9 is a main body made of synthetic resin and covered with a cover, and the main body 9 engages with a striker (not shown). Latch 10
and the poles 11 that engage with the latch 10 are respectively connected to the shaft 1.
2 and 13 so as to be rotatable. 1
Reference numeral 4 denotes a groove formed in the main body 9 into which a striker (not shown) enters.

The latch 10 has a groove 10 in which the striker engages.
a, half latch claw 10b, full latch claw 10c
The full latch pawl 10c is formed on one side of the groove 10a in which the striker engages. 15 is a spring that biases the pawl 11 in the direction of the latch 10, and 16 is a pin that connects the pawl 11 and the operating member.

Reference numeral 17 designates a push button switch, which is a feature of the present invention, in which an actuator 18 of the switch 17 engages with a cam surface 19 of the latch 10, and is provided at an end portion of the cam surface 19 at a position substantially symmetrical to the groove 10a of the latch. When the actuator 18 is pushed up by the protrusion 20, a full latch signal is issued to close the door as shown in FIG. emit a signal. A connector 21 is connected to the push button switch 17 by a lead wire 22. The lead wire 22 is pushed into a groove 9a formed in the resin main body 9 as shown in FIG. 7 and is clamped. If the main body 9 is clamped with the groove 9a provided in this way, the number of parts can be reduced compared to the conventional clamping using separate metal fittings. FIG. 4 shows an embodiment different from FIG. 3, in which a protrusion 9' is provided on the main body 9,
A groove 9a' is formed in this portion, and the lead wire 22 once exposed outside the main body 9 is clamped by this groove 9a', but there is no difference in the operation and effect.

As explained in detail above, in the present invention, the switch that issues the signal to close the door is disposed in the main body on the opposite side of the latch from the pole. The door lock mechanism is not as thick as the conventional door lock, and the pole, latch, and switch are lined up in a line vertically, making it extremely thin despite the switch being attached to the door lock. Therefore, the thickness of the door does not need to be increased, and the recent demand for thinner door lock mechanisms from the viewpoint of strength can be met.

Further, the latch is formed with a striker engaging groove, a half latch pawl, and a full latch pawl, and the full latch pawl is formed on one side of the striker engaging groove, so that it engages with the cam surface of the latch to protrude and retract. When the actuator of the switch disposed in the main body engages with the protrusion provided on the end of the cam surface at a position approximately symmetrical to the striker engagement groove formed on the latch, a door close signal is issued by full latch; The half latch is designed not to emit the signal, so even if the door is deformed due to a collision or the like, the switch will operate reliably, and there is no problem with the door opening signal being emitted while the door is closed. Furthermore, since the switch is disposed within the main body, the switch mechanism can easily be made waterproof and dustproof.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of a conventional door lock with a door opening/closing switch, Fig. 2 is an exploded view to explain the engaged state of the switch, and Fig. 3 is a door lock showing an embodiment of the present invention. 4 is a front view of the door lock showing another embodiment; FIGS. 5 and 6 are explanatory views of the engagement state of the latch and switch in different operating states;
FIG. 7 is a sectional view taken from A to A in FIG. 3 and from A' to A' in FIG. 4. Explanation of the main parts of the figure, 9...Main body, 10...Latch, 10a...Striker engagement groove, 11...Pole, 15...Spring, 17...Switch,
18... Actuator, 19... Cam surface, 20
...protrusion.

Claims (1)

[Claims] 1 A striker fixed to the vehicle body side engages and disengages a latch pivotally mounted in the main body covered by a cover on the door side, and the rotation of the latch is urged in the latch direction and a pole comes into contact with the latch. In an automobile door lock device that is stopped by the action of the latch, the latch is formed with a striker engaging groove, a half latch pawl, and a full latch pawl, and the full latch pawl is formed on one side of the striker engaging groove. ,
and a switch having a cam surface formed on the outer periphery of the latch, a protrusion provided at a position substantially symmetrical to the striker engagement groove at the end of the cam surface, and an actuator that engages with the cam surface and retracts. , wherein the door is disposed in the main body on a side opposite to the pawl with respect to the latch, so that when the actuator engages with the protrusion of the latch, a signal for closing the door by a full latch is generated. Door lock with open/close detection switch.