JPS6122011Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an opening/closing detection switch device for a vehicle door.

A so-called full-passage type seatbelt device has been proposed in which an electric motor automatically moves an activated seatbelt when a vehicle door is closed, thereby restraining the driver in the driver's seat with the seatbelt. In such a seat belt device, it is necessary to electrically detect the opening and closing of the door, and for this purpose, conventionally, a door detection switch that is activated by engaging with the door is attached to the vehicle body. However, such a door detection switch has a problem in that the door detection switch does not operate even though the door is closed due to variations in the dimensions of the body and the door.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle door opening/closing detection switch device that can always reliably detect the open/closed state of the door even when used for a long period of time.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an example of a full-passage type seat belt device. Referring to FIG. 1, 1 is a vehicle body, 2 is a driver's seat, and 3 is a seat belt 3 capable of restraining a driver. One end of the seat belt 3 is connected to a winding device 4 that constantly biases the seat belt 3 in the winding direction by a spring force, and the other end of the seat belt 3 is connected to a slider 6 that slides along a guide rail 5. connected to. This slider 6 is connected on the one hand via a strip 7 to a winding device 8 which constantly urges this strip 7 in the winding direction, and on the other hand via a wire 9 to an electric motor 10 for wire actuation. . When the door is opened, the electric motor 10 rotates forward and the slider 6 moves toward the front of the vehicle, allowing the driver to tighten the seat belt 3.
be able to exit the vehicle in order to be released from restraint. On the other hand, when the driver sits on the seat 2 and closes the door, the electric motor 10 reverses and the slider 6 moves toward the rear of the vehicle, thereby restraining the driver with the seat belt 3 as shown in FIG. will be done.

Figure 2 shows a door lock device 11 attached to a vehicle door and a striker 12 fixed to a vehicle body 1.
shows. This striker 12 has a rod-shaped engaging portion 13 extending perpendicularly to the plane of the paper. On the other hand, the door lock device 11 includes a casing 14, a striker entry slit 15, a latch 17 pivotally connected to the casing 14 via a pivot pin 16, and a latch 17 that is rotatably connected to the casing 14 via a pivot pin 18.
a lock arm 19 rotatably pivoted to 4;
A compression spring 20 that constantly urges the lock arm 19 toward the latch 17 and a bolt (not shown) inserted into a pair of holes 21 connect the casing 1 to the lock arm 19.
4 is provided with a door opening/closing detection switch 22 fixed to the door opening/closing detection switch 22. Note that instead of fixing the door opening/closing detection switch 22 to the casing 14 with bolts, a pair of bosses are integrally formed on the inner wall surface of the casing 14.
A hole 2 for the door opening/closing detection switch 22 is provided in these bosses.
1 may be fitted and fixed. Latch 17
has an engagement groove 23 on its outer periphery that can be engaged with the striker engagement portion 13, and this engagement groove 23 overlaps with the slit 15 as shown in FIG. on the other hand,
On the outer periphery of the latch adjacent to this engagement groove 23 is a stepped portion 25 that can be engaged with the tip 24 of the lock arm 19.
is formed, and another step 26 is formed on the latch outer periphery on the side remote from the striker 12 with respect to this step 25. On the other hand, a cam surface 27 is formed on the outer periphery of the latch located on the opposite side from these engagement grooves 23 and steps 25 and 26 with respect to the pivot pin 16 of the latch 17, and a contact switching arm of the detection switch 22 is formed on this cam surface 27. 28 comes into contact. When the door is open, as shown in FIG. Ru. At this time, the distance l between the cam surface 27 and the pivot pin 16 with which the arm 28 comes into contact is the shortest, and thus the arm 28 is at its maximum protrusion position. On the other hand, when the striker engaging portion 13 enters the slit 15 when closing the door, the striker engaging portion 13 and the side wall of the engaging groove 23 engage with each other, thereby causing the latch 17 to rotate clockwise. Then, the striker engaging portion 13 further penetrates into the slit 15, and the step portion 26 of the latch 17 engages with the tip portion 24 of the lock arm 19. When the stepped portion 26 and the protruding lock arm tip 24 are engaged in this way, the door is in an ajar state, but since the striker 12 is latched by the latch 17, even if the door is ajar, the door is in an ajar state. There is no danger of it opening automatically. Next, when the door is further closed and the striker engaging part 13 enters the position shown by the broken line 13a, the step part 25 of the latch 17 and the tip part 24 of the lock arm 19 engage with each other as shown by the broken line. Counterclockwise rotational movement is prevented.
At this time, the striker engaging portion 13a is connected to the latch 17.
The engagement groove 23 prevents the door from coming out of the slit 15, thus keeping the door closed. On the other hand, at this time, the distance m between the cam surface 27 and the pivot pin 16 that the arm 28 comes into contact with becomes the longest, and thus the arm 28
is in the maximum retraction position. When opening the door, the lock arm 19 is rotated counterclockwise from the outside, thereby causing the step 25 of the latch 17 and the lock arm 1 to
9 is disengaged from the distal end portion 24.

From Fig. 3 to Fig. 7, the door opening/closing detection switch 22 is shown.
shows. Referring to FIGS. 3 to 7, the casing 30 of the detection switch 22 has a hollow rectangular tube shape with one end 31 open, and a contact holding member 32 is fitted into the casing 30 from the open end 31. Ru. As shown in FIGS. 3 and 4, an L-shaped slider 33 is slidably inserted into the casing 30, and an arm 28 integrally formed with the slider 33 is attached to an aperture 34 formed in the casing 30.
protrude outward through. Circular holes 35 and 36 are formed in the slider 33 and extend in directions perpendicular to each other.
A compression spring 3 is provided between this circular hole 35 and the casing 30.
7 is inserted. On the other hand, a groove 38 extending in the horizontal direction is formed on the slider 33 at the open end of the circular hole 36 . A cylindrical roller 39 constituting a movable contact is rotatably fitted into the groove 38, and a compression spring 40 for pressing the cylindrical roller 39 toward the contact holding member 32 is inserted into the circular hole 36. Ru. on the other hand,
As shown in FIGS. 3 and 5, the contact holding member 3
2, the longest fixed contact 41, the shortest fixed contact 42, and a fixed contact 43 having an intermediate length between the two fixed contacts 41 and 42 are protruded, and the fixed contacts 41 and 42 and 43 are arranged parallel to each other. Further, as shown in FIGS. 3 and 5, the fixed contacts 42 and 43 are arranged in a straight line with a gap between them, and both of the fixed contacts 42 and 43
A protrusion 4 made of an insulating material has a protrusion height equal to the protrusion height of these fixed contacts 42 and 43 and is made of an insulating material.
Filled in by 4. As shown in FIG. 6, a pair of openings 45 are provided on the side wall surface of the casing 30.
46 are formed, and claws 47, 48 which can be fitted into these openings 45, 46 are formed on the side wall surface of the contact holding member 32, as shown in FIGS. 8 and 9. Meanwhile, as shown in FIG. 7, an opening 49 is formed on the other side wall surface of the casing 30, and an eighth hole 49 is formed on the other side wall surface of the contact holding member 32.
As shown in the figure, a claw 50 that can be fitted into the opening 49 is formed. Therefore, when the contact holding member 32 is inserted into the casing 30 as shown in FIG. The holding member 32 is fixedly held within the casing 30.

In FIG. 3 and FIG. 5, each fixed contact 41,
42 and 43 are the corresponding conductor monks 51, 52, and 5, respectively.
3 through the wire actuating electric motor 10 of FIG.
The control circuit (not shown) is connected to a control circuit (not shown) for driving the control circuit. When the door is opened, the arm 28 is at its maximum protrusion position as described above, and at this time the fixed contact 4
1 and 42 are connected to each other via a cylindrical roller 39. At this time, the wire actuating electric false motor 10 is rotated in the normal direction, and the driver is released from being restrained by the seat belt 3 as described above. Meanwhile, when the door is completely closed, the arm 28
moves against the compression spring 37 to the maximum retracted position, the fixed contacts 41 and 43 are connected to each other through the cylindrical roller 39. At this time, the wire actuating electric motor 10 is reversed and as described above. The driver will be restrained by the seat belt 3.

As described above, according to the present invention, since the door open/close detection switch engages with the latch for completely locking the door, it is possible to reliably detect that the door is completely closed. Furthermore, the fixed contact that contacts the movable contact of the door opening/closing line detection switch extends in a straight line in the moving direction of the movable contact, so even if the movable contact and fixed contact become worn out after long-term use, the switching action of the switch will be maintained. The position of the arm does not deviate from a predetermined position, and thus door opening/closing operations can be reliably detected even after long-term use. Furthermore, in the embodiment shown in FIG. 5, one of the fixed contact groups 42 and 43 is divided into two, but by dividing this fixed contact group into three, it is possible to detect the ajar state of the door. have

[Brief explanation of the drawing]

Fig. 1 is a side view of the inside of the vehicle, Fig. 2 is a side view of the door lock device, Fig. 3 is a side sectional view of the door open/close detection switch, Fig. 4 is a sectional view taken along the - line in Fig. 3, Fig. 5 is a sectional view taken along the - line in Fig. 3, Fig. 6 is a side view of the door opening/closing detection switch housing seen from one side, and Fig. 7 is a side view of the door opening/closing detection switch seen from the other side. FIG. 8 is a side view of the contact holding member, and FIG. 9 is a side view of the contact holding member. 11... Door lock device, 12... Striker, 15... Slit, 17... Latch, 19...
... Lock arm, 22 ... Door open/close detection switch, 28 ... Arm, 39 ... Cylindrical roller, 41,
42, 43...Fixed contacts.

Claims (1)

[Scope of utility model registration request] In a vehicle equipped with a door lock device on the vehicle door side that engages with a striker fixed to the vehicle body, the door lock device has a rotatable striker lock latch, a striker entry slit, and a striker locking device that engages with the latch to lock the door lock device. a lock arm for holding the door in the striker lock position; the latch has an engagement groove on its outer periphery that engages the striker and overlaps the slit; A door opening/closing detection switch is provided with an electrical contact switching arm that engages with the electrical contact switching arm, and the door opening/closing detection switch is in constant contact with a movable contact carried by the electrical contact switching arm and the movable contact. a first fixed contact extending linearly in the moving direction of the movable contact;
A vehicle door opening/closing detection switch device comprising second and third fixed contacts arranged so as to be able to come into contact with the movable contact and extending in parallel with the first fixed contact on a straight line.