JPH037531B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle seat belt device, and is effective for use as a driver protection device for all vehicles such as passenger cars and freight cars.

In the conventional three-point seat belt, the anchor point of the outer belt is located at the rear of the passenger seating position, so there is a drawback that it is difficult to remove the tongue plate. Therefore, it becomes troublesome to put on the seatbelt, which is one of the causes of a decline in the rate of seatbelt use. This tendency is particularly noticeable in two-door vehicles because the anchor point of the shoulder belt is located further to the rear.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, it is an object of the present invention to move the outer belt and tongue plate to the entire surface of the passenger side after the passenger gets on the vehicle, thereby making it easier to remove them.

In order to achieve this purpose, the present invention includes a hook that engages with the outer belt, an arm that is rotatably connected to the hook, and a hook that is rotatably connected to the arm and has one end rotatably fixed to the vehicle body. a sub-arm, a device for holding the sub-arm in a predetermined position, a drive mechanism for rotating the sub-arm forward, and a mechanism for detecting the wearing of a seat belt and returning the sub-arm to the predetermined position, The drive mechanism includes a guide arm having a button that is removable from the sub-arm, and the button is interlocked with the hook.

Next, the most preferred first embodiment of the present invention will be described based on the drawings.

FIG. 1 is a diagram showing the overall configuration of the first embodiment,
It is a diagram when applied to the right seat. The outer belt 1, which is wrapped around the body of the occupant to maintain the occupant's posture, has one end 1a fixed to the floor of the vehicle body 18 on the right side of the seat cushion 7, and is attached to a plate-shaped slip joint 3 having a slit portion. The other end 1b is housed in a retractor 2 fixed to the right side of the vehicle body 10. The slip joint 3 is fixed to the upper side of the backrest 6 of the vehicle body 18, and is connected to the outer belt 1.
is secured to an L-shaped hook 8 from the slip joint 3 to one end 1a. As shown in FIG.
They are rotatably connected while maintaining a gap.
In the gap between the hook 8 and the arm 9, a first
The torsion coil spring 21 has one end fixed to the notch 81 of the hook 8 and the other end fixed to the notch 91 of the arm 9, and exerts a force in the direction that the hook 8 and the arm 9 are aligned in a straight line. . The arm 9 is in sliding contact with a roller 17 fixed to the vehicle body 18 and slides on the roller 17, and the other end 9b is rotatably connected to one end of the sub-arm 10 via a second pin 22b. Other end 10 of sub arm 10
b has a quarter circular shape, a first spacer 23 is interposed between the quarter circular end 10b and the guide arm 11, and a spacer is provided between the guide arm 11 and the vehicle body 18. A second spacer 24 is interposed, and a third pin 22c passing through the sub-arm 10, the first spacer 23, the guide arm 11, and the second spacer 24 allows the sub-arm 10 and the guide arm 11 to be connected to the rear of the seat cushion 7. Lower car body 1
It is rotatably fixed to 8. A second torsion coil spring 19 is disposed around the outer periphery of the first spacer 23, one end 19a of which is fixed to the notch 10a of the sub-arm 10 as shown in FIG. 4, and the other end 19b
is fixed to the vehicle body 18. Further, a third torsion coil spring 20 is provided on the outer periphery of the second spacer 24.
is arranged, one end 20a of which is connected to the guide arm 11.
The other end 20b is fixed to the notch 11a of the vehicle body 1.
It is fixed at 8. The sub-arm 10 and the guide arm 11 are subjected to a rotational force in a direction away from the backrest 6 by the second and third torsion coil springs 19 and 20. A circular hole is formed at the other end of the guide arm 11, and a cylindrical button 12 is slidably inserted into this circular hole. A coil spring 25 and a button holder 26 for supporting the button 12 are provided on the vehicle body 18 side of the button 12, and the coil spring 25 biases the button 12 toward the sub-arm 10 side. Further, a first wire 13 is connected to the end of the button 12 on the vehicle body 18 side, and this first wire 13 is connected to the sub arm 10 and the arm 9.
and is connected to the hook 8. Note that the first wire 13 is covered with a covering member 13a.

As shown in FIG. 5, there is a seat plate 27 inside the seat cushion 7 where the weight of the occupant is concentrated, and between this seat plate 27 and the back plate 7a of the seat cushion 7 A coil spring 16 is interposed to urge the seat plate 27 upward. The shaft 15 having the spherical portion 15a at its end has a spherical portion 15b.
It is coupled to the seat plate 27 at , passes through the inside of the coil spring 16 and through the back plate 7a, and the other end 15b is bent into an L-shape. And this end portion 15b has a second
A wire 14 is connected, and the other end of the second wire 14 is connected to the guide arm 12.
Note that, like the first wire 13, the second wire 14 is also covered with a covering member 14a.

A tongue-shaped tongue plate 4 having a slit is attached to the outer belt 1 with the outer belt 1 passing through the slit. A connecting buckle 5 is provided. By connecting the buckle 5 and the tongue plate 4, the outer belt 1 is held in a state where it is wrapped around the body of the occupant.

Next, the operation of the embodiment described above will be explained.

Before the occupant gets on the vehicle, the sub-arm 10 and the guide arm 11 are stored behind the backrest 6 by the second and third torsion coil springs 19 and 20, as shown in FIGS. 1 and 4. , the hook 8 is located on the side of the backrest 6. Since the outer belt 1 is locked to the hook 8, the hook 8
The force exerted by the first torsion coil spring 21 and the tension of the outer belt 1 are balanced.

When an occupant sits on the seat cushion 7, the seat plate 27 inside the seat cushion 7 and the shaft 15 connected thereto are pushed down by the weight of the occupant against the force of the coil spring 16. . When the shaft 15 is pushed down, the second wire 14 connected to the tip thereof is pulled, and the guide arm 11 connected to the other end of the second wire 14 moves backrest around the third pin 22c. Rotate to the 6 side. At this time, the button 12 provided on the guide arm 11 protrudes toward the sub-arm 10 side by the force of the coil spring 25 as shown in FIG. is pressed by the button 12, and the third pin 22 is pressed on the backrest 6 side.
Rotates around c. When the sub-arm 10 rotates toward the backrest 6, the arm 9 connected thereto slides on the roller 17, and the outer belt 1
The hook 8 on which the tongue plate 4 is hooked projects forward of the backrest 6 and to the front side of the passenger, so that the tongue plate 4 can be easily picked up by the passenger. This state is shown in FIGS. 6 and 7.

When the passenger picks up the tongue plate 4 and removes the outer belt 1 from the hook 8 in order to connect it to the buckle 5, the hook 8 is moved into an arm by the biasing force of the first torsion coil spring 21 as shown in FIG. 9 and the hook 8 is rotated in a direction that increases the angle formed by the hook 8. Then, the first wire 13 connected to the hook 8 is pulled, and the button 12 connected to the other end of the first wire 13 is moved to the button holder 26 against the force of the coil spring 25, as shown in FIG.
The button 12, which was housed inside and in contact with the sub-arm 10, is separated from the sub-arm 10. As a result, the sub-arm 10 rotates about the third pin 22c in a direction away from the backrest 6 by the force of the second torsion coil spring 19, and the arm 9 and the hook 8 return to their positions before riding. This state is shown in FIGS. 10 and 11.

Next, when the passenger disengages the tongue plate 4 and buckle 5 in order to get off the vehicle, the outer plate 1 is retracted by the retractor 2, and the outer belt 1 is reengaged with the hook 8 which has returned to its initial position. Then, the tension of the outer belt 1 causes the hook 8 to rotate against the force of the first torsion coil spring 21 so that the angle formed between the hook 8 and the arm 9 becomes smaller. The tension of the first wire 13 connected to the hook 8 is reduced, and the button 12 tends to protrude from the button holder 26. However, this button 12 cannot protrude because it is covered by the quarter circular end 10b of the sub-arm 10. Therefore, when the passenger gets out of the vehicle, the seat plate 27 and shaft 15 are moved by the coil spring 16.
As the tension of the second wire 14 decreases, the guide arm 11 moves away from the backrest 6 by the force of the third torsion coil spring 20, centering on the third pin 2c. Rotate. At this time, button 12 is 4 of sub arm 10.
After sliding on the quarter-circular end 10b and sliding out of the range covered by the quarter-circular end 10b, it protrudes from the button holder 26 and returns to the state shown in FIG.

If a seat belt device like this example is used,
When the occupant is seated, the tongue plate protrudes forward toward the occupant, making it easier for the occupant to remove the tongue plate.

Next, a second embodiment of the present invention will be described. In the first embodiment described above, the second wire 14 was connected to the shaft 15 inside the seat cushion 7, but in the second embodiment, as shown in FIG.
A second wire 14 was connected to a rod 29 provided at 8. That is, an elongated hole 18a is provided in one side of the vehicle body 18 that comes into contact with the door 28 only when the door 28 is closed, and an L-shaped rod 29 to which the second wire 14 is connected is inserted into the elongated hole 18a. door 28
When the door 28 is open, the rod 29 protrudes from the elongated hole 18a and exerts no force on the second wire 14, but when the door 28 is closed, the rod 29 is pushed into the elongated hole 18a by the door 28. At the same time, the second wire 14 is pulled to exhibit the same operation as in the first embodiment described above.

If such a second embodiment is used, the arm 9 moves only after the occupant is seated and the door 28 is closed, so that the risk of the arm 9 causing unnecessary interference when the occupant gets on the vehicle is reduced.

Although the embodiments described so far have been described for the case of the right seat, it goes without saying that the present invention may also be used for the left seat.

As described above, by using the seat belt device of the present invention, the outer belt and the tongue plate can be moved to the front side of the occupant after the occupant gets on the vehicle, making it easier for the occupant to remove the tongue plate.

Further, in the present invention, the drive mechanism for rotating the sub-arm forward is composed of a guide arm having a button that can be engaged with and detached from the sub-arm, and the button is configured to be linked to a hook that engages with the outer belt. Because of this, the button engages and disengages from the sub-arm in conjunction with the movement of the hook, and therefore the engagement between the button and the sub-arm can be achieved without the need to rotate the sub-arm, for example, in the axial direction.
The engagement is reliable and therefore reliable movement of the hook via the arm and sub-arm can be achieved.

[Brief explanation of drawings]

Figures 1 to 5 show the situation before riding. Figure 1 is an overall view, Figure 2 is a diagram showing the position of the hook and arm, Figure 3 is a sectional view showing the joint between the sub arm and the guide arm, and Figure 3 is a cross-sectional view showing the joint part of the sub arm and guide arm. Figure 4 is a diagram showing the positions of the sub-arm and guide arm, Figure 5 is a cross-sectional view showing the seat plate and shaft, Figures 6-7 show when a passenger is on board, and Figure 6 is an overall view. , Fig. 7 shows the positional relationship between the sub-arm and the guide arm, Figs. 8 to 11 show the state after the occupant has fastened the seat belt, and Fig. 8 shows the positional relationship between the arm and the hook. Figure 9 is a cross-sectional view showing the joint between the sub-arm and the guide arm.
FIG. 0 shows the positional relationship between the sub-arm and the guide arm, FIG. 11 shows the overall view, and FIG. 12 shows another embodiment. 1...Outer belt, 7...Seat cushion, 8
...Hook, 9...Arm, 10...Sub arm, 11
...Guide arm, 12...Button, 13...First wire, 14...Second wire, 15...Shaft, 18...
Vehicle body, 19...Second torsion coil spring, 21
...First torsion coil spring, 27... Seat plate.

Claims (1)

[Claims] 1. A hook that engages with the outer belt, an arm that is rotatably connected to the hook,
A sub-arm rotatably connected to the arm and having one end rotatably fixed to the vehicle body, a device for holding the sub-arm in a predetermined position, a drive mechanism for rotating the sub-arm forward, and a seat belt. a mechanism for detecting wearing of the sub-arm and returning the sub-arm to a predetermined position; the drive mechanism includes a guide arm rotatably fixed to the vehicle body; and a mechanism that protrudes from the guide arm and engages with the sub-arm. A seatbelt device, comprising: a button, the button being housed in the guide arm in conjunction with the hook. 2. The drive mechanism includes a seat plate disposed inside the seat cushion, a shaft coupled to the seat plate, a second wire coupled to the shaft, and the other end of the second wire coupled to each other, and 2. The seat belt device according to claim 1, comprising: a guide arm having the button that is removable from the sub-arm; and a first wire connecting the button and the hook. 3. The drive mechanism includes a rod that moves as the door is opened and closed, a second wire connected to the rod, and the button to which the other end of the second wire is connected and is removable from the sub-arm. The seat belt device according to claim 1, comprising a guide arm and a first wire connecting the button and the hook. 4. The seat belt according to claim 1, wherein the mechanism for returning the sub-arm to a predetermined position comprises a first torsion coil spring installed on the hook and a second torsion coil spring installed on the sub-arm. Device.