JPH0517060B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a passive seat belt device for a vehicle that is improved so that the belt is reliably placed in the proper position of a seated person.

[Conventional technology]

FIG. 18 shows an example of a conventional seat belt device.

This seat belt device automatically attaches a shoulder belt 03, which is a webbing, to a person 04 sitting in the seat 02 in a straddling manner when the door 01 of the car is opened, the person is seated on the seat 02, and the door 01 is closed. Furthermore, when the seated person 04 exits the vehicle by opening the door 01, the shoulder belt 03 is automatically separated from the seated person 04 as the door 01 is opened. It is.

One end of the shoulder belt 03 is fixed to an anchor 06 attached to the inner surface of the upper part of the tower section 05 that stands up from the upper rear end of the door 01, and the other end is attached to the side of the seat 02 opposite to the door 01. It is adapted to be wound around a retractor 08 having a built-in inertia lock mechanism (not shown) attached to the floor 07 of the vehicle body.

In this conventional example, a passive seat belt is applied to the sashless door 01, but a passive seat belt is applied to the door with a sash,
In addition, as a retractor mounted on the door side, there is, for example, one disclosed in Japanese Utility Model Publication No. 18923/1983.

[Problem that the invention seeks to solve]

In the conventional device shown in FIG.
Open door 1 and sit on seat 02, then open door 01.
When the shoulder belt 03 is closed, the shoulder belt 03 is gradually wound around the retractor 08, and as shown by the imaginary line in FIG. (hereinafter simply referred to as the normal position) gradually approaches A.

However, if the seated person is a woman, the shoulder belt 03 may catch on the seated person's chest while it reaches its normal position, as shown by the solid line in Fig. 18, compressing the chest. Since it reaches the normal position,
The problem is that it is uncomfortable.

In addition, the device disclosed in the above-mentioned Japanese Utility Model Publication No. 59-18923 has the same problem as the above-mentioned case, and also when the shoulder belt 03 remains caught on the chest and cannot be pulled to the normal position. There are also problems.

The present invention aims to provide a vehicle seat belt device that solves the above-mentioned problems, and particularly aims to improve safety.

[Means for solving problems]

According to the present invention, as a specific means for achieving the above object, one end of the belt is locked to the vehicle body side on one side of the seat, and the other end is locked to the door side on the other side of the seat. A retractor is provided at the end of the belt that is locked to the locking part and winds up the belt with a predetermined winding force, and the retractor is installed near the locking part on the other side of the sheet to move the belt from the non-operating position to the working position. A rotary arm is rotatably provided, which allows the belt to be attached to the shoulder at the normal mounting position by rotating the belt, and a drive device for rotating the rotary arm is further provided to close the door. A passive seat belt device for a vehicle that restrains a person seated on a seat includes a stopper that limits the rotation range of the rotary arm between a downwardly facing non-operating position and a forward facing operational position. At the same time, the rotating arm is coupled to the rotating shaft rotated by the drive device through frictional contact, and an external force greater than this frictional contact force is applied to the rotating arm, thereby causing the rotating arm and the rotating shaft to connect. The driving device is configured to allow relative rotation, and causes the drive device to reciprocate the rotating shaft by an amount of rotation corresponding to one reciprocating amount of rotation of the rotating arm from the non-operating position to the operating position from the start of operation. Accordingly, the present invention is characterized in that a position control sensor is provided to stop the operation of the drive device.

Note that the rotating arm may be provided on any of the vehicle body, such as a pillar or a door.

[Effect]

According to the passive seat belt device for a vehicle of the present invention, when the drive device is activated when fastening the seat belt after sitting on the seat, the rotating arm is rotated by a predetermined angle. A pivoting arm pulls the belt toward its normal wearing position.

Therefore, even if the belt gets caught on the seated person's body, clothes, or other objects while it is being worn, the belt can be easily removed from the snag, and the belt can be reliably attached to the correct attachment position. can.

In the unlikely event that the belt gets caught on the seated person's hands, neck, or fragile objects while being attached, and the belt does not easily detach from them even if the rotation arm is activated, the belt should be When the tension becomes greater than the frictional contact force between the rotating arm and the rotating shaft, the rotating arm and the rotating shaft rotate relative to each other, thereby preventing the belt from being overtightened.

In addition, when the rotating arm is not in operation, if a part of the human body or an object collides with the rotating arm and an external force greater than the above frictional contact force is applied to the rotating arm, the rotating arm will stop. The impact on the human body or object is alleviated by rotating relative to the rotation axis.

〔Example〕

1 to 14 show a first embodiment of the present invention.

The general structure of this embodiment will be explained with reference to FIGS. 1 to 3. Reference numeral 1 denotes a seat for the driver's seat provided on the vehicle body floor (not shown), and includes a seat 2 and a backrest 3. It is made up of 4 is
It is a suspensionless door, and the front end thereof is pivotally connected to the vehicle body with a door hinge (not shown) having a pivot shaft facing in the vertical direction, and the tower part 4a stands up at the rear end while gently curving inward. It is equipped with

Reference numeral 5 denotes a waist belt which is not directly related to the present invention, and like a known belt, one end is wound around a retractor (not shown) with a built-in inertia lock mechanism provided on the floor on the side of the seat 1 on the door 4 side. A tongue piece 6 provided at the other end.
is inserted into and locked into the buckle main body 7 which is pivotally attached to the floor on the side opposite to the door 4 of the seat 1.
(See Figure 4) can be worn around the waist. The tongue piece 6 and the buckle body 7 form a known buckle device 9.

Reference numeral 10 denotes a shoulder belt, which is a webbing, and one end of the shoulder belt is wound around a known retractor 11 equipped with a built-in inertia lock mechanism and installed at the rear lower part of the door 4. The shoulder belt 10 extends upward inside the tower portion 4a of the door 4 from the retractor 11, exits to the inside of the vehicle through an opening 12 formed in the middle portion of the inner surface of the tower portion 4a, and then closes the tower portion 4a. It passes through a horizontally elongated hole 13a of a shoulder through hole 13 installed slightly above the opening 12 on the inner surface of the seat 1, and from there extends inwardly and downwardly through the front of the backrest 3 of the seat 1. Shoulder belt 1
A tongue piece 14 is attached to the end opposite to that wound around the retractor 11 at 0, and this tongue piece 14 is attached to the side of the seat 1 opposite to the door 4, and is attached to the vehicle body floor. By inserting and locking the buckle body 15 which is pivotally connected to the buckle body 15, the shoulder belt 10 can be worn across the seated person 8 with the door 4 closed, and the seated person 8 can be secured in the event of a car collision or the like. The seat 1 is designed to prevent the seat from jumping out of the seat 1 forward. A known buckle device 16 is formed by the tongue piece 14 and the buckle body 15.

The buckle device 16 is for emergency release of the shoulder belt 10, and there is no need to remove the buckle device 16 normally.

When the door 4 is opened, the shoulder belt 10 is let out from the retractor 11, is pulled by the shoulder through 13, and moves forward away from the seated person 8. At this time, the seated person 8 can exit the vehicle by passing between the seat 1 and the shoulder belt 10.

In addition, when the door 4 is open and the door 4 is closed after passing between the seat 1 and the shoulder belt 10 to get on the vehicle and sitting on the seat 1, the shoulder belt 10 is closed.
0 is taken up by the retractor 11 while the seated person 8
It is attached in a sash-like manner.

At this time, the shoulder belt 10 is hooked onto the chest of the seated person 8 as shown in FIG. 12, and is placed in the normal wearing position as shown in FIG. In order to prevent the rotating arm 17 from being worn diagonally around the waist (hereinafter simply referred to as the normal position),
It is provided on the inner surface of the upper end of the tower portion 4a of the door 4.

As shown in detail in FIGS. 4 to 11, a box-shaped case 18 with an inward opening is fixed to the upper end of the tower portion 4a with bolts 19. The part has cover 2
0 is fixed with a set screw 21.

A substantially horizontal rotating shaft 22 facing in the left-right direction is provided through the case 18 and the cover 20 so as to protrude inward from the cover 20. This rotating shaft 22 intersects the inner surface of the tower portion 4a of the door 4 at an inclination angle that is not perpendicular.

The rotating shaft 22 has a large diameter part 22a whose outer diameter gradually decreases from the end on the case 18 side to the end on the cover 20 side, a medium diameter part 22b, and a short shaft part 22c.
and a small diameter portion 22d. Medium diameter portion 22
Planed surfaces 23 and 24 are formed on both sides of the outer periphery excluding the vicinity of the end near the large diameter portion 22a in b, and on one side of the small diameter portion 22d, and at the tip of the small diameter portion 22d. is provided with a male thread 25.

A central hole 26 having a conical inner end is bored in the center of the end surface of the rotating shaft 22 on the side of the large diameter portion 22a. The ball 27 is attached to a carburized and quenched seat 29 that is fixed to the inner surface of a receiving member 28 that is screwed onto the case 18.
By receiving the rotary shaft 22, one end of the rotating shaft 22 is supported.

A short shaft portion 22c of the rotating shaft 22 is rotatably fitted into a bearing hole 30 formed in the cover 20.

The small diameter portion 22d of the rotating shaft 22 that protrudes inward from the cover 20 has a D-shaped hole 31a of the friction plate 31,
A circular shaft hole 3 protruding from the base of the rotating arm 17
2, the circular hole 33a of the friction plate 33, the D-shaped hole 34a of the friction plate 34, and the disc spring 35 are fitted in order,
In addition, by tightening the nut 36 screwed onto the male thread 25, these are pressed against each other, and the rotating arm 17 is coupled to the rotating shaft 22 with an appropriate frictional force. Therefore, due to an external force greater than the mutual frictional force between the friction plates 31, 33, 34 and the rotating arm 17, the rotating arm 17
can be rotated relative to the rotating shaft 22 and the friction plates 31 and 34, which cannot rotate relative to the rotating shaft 22.

A stopper 37 that protrudes inward is provided below the bearing hole 30 in the cover 20. As shown in FIG. By fitting into an arcuate groove 38 having an opening angle of approximately 90° or slightly larger around the rotating shaft 22 formed in the
Approximately between the downwardly facing non-actuated position shown in solid lines in Figure 2 and the forward facing activated position also shown in phantom lines.
It is limited to a range of 90°.

Since the rotating arm 17 faces in a direction perpendicular to the substantially horizontal rotation axis 22, it forms an inclined angle with respect to the inner surface of the tower portion 4a of the door 4. The tip of the rotating arm 17 is shaped like a gentle hook toward the front and slightly toward the inner surface of the door 4 in order to make it easier to hook the shoulder belt 10 and prevent it from coming off when the rotating arm 17 rotates. Each is bent so that it is inclined.

A guide member 39 having an arc-shaped and wide guide surface 39a on the upper part is rotatably fitted onto the large diameter portion 22a of the rotating shaft 22, and a guide member 39 having no flattened surface 23 on the middle diameter portion 22b of the rotating shaft 22 is rotatably fitted. In part,
A rotary lever 40 is rotatably fitted on the outside.

A protruding piece 40a facing outward is connected to the lower end of the rotating lever 40, and when this protruding piece 40a engages with a notch 41 formed in the lower end of the guide member 39, the rotation lever 40 rotates. The movable lever 40 and the guide member 39 can rotate together around the rotating shaft 22.

A bending piece 40b is connected to the upper end of the rotating lever 40, and the bending piece 40b is bent so as to be substantially parallel to the inner surface of the upper end of the tower portion 4a of the door 4. The cable end member 42
is pivotally mounted with a shaft 43.

One end of a flexible cable 44 such as a wire is fixed to the cable end member 42 . The cable 44 extends from the cable end member 42 along the arc-shaped guide surface 39a of the guide member 39 and diagonally crosses the guide surface 39a (see FIGS. 6 and 9), gently extending downward. After being curved, a flexible guide tube extends downward through a notch 45 formed in the bottom wall 18a of the case 18, and its upper end is held by a fixing fitting 46 fixed to the lower surface of the case 18. 47
It is movable in the axial direction.

A protruding piece 40c facing inward is connected to the front edge of the rotating lever 40.

A fixed lever 48 has an elongated hole 49 and is fitted to the rotating shaft 22 so as not to be relatively rotatable in a portion of the inner diameter portion 22b of the rotating shaft 22 inside the rotating lever 40 where the planed surface 23 is located. There is. This fixed lever 4
8, when the rotating lever 40 is rotated clockwise in FIG.
is pushed by the protruding piece 40c, and is rotated in the same direction together with the rotating lever 40 and integrally with the rotating shaft 22.

A collar 5 is provided around the middle diameter portion 22b of the rotating shaft 22 between the fixed lever 48 and the cover 20.
A coil spring 51 is wound around the outer periphery of the collar 50. As clearly shown in FIGS. 4 and 8, one end 5 of the coil spring 51
1a to the bottom wall 18a of the case 18, and the U-shaped folded portion 51b formed at the other end of the coil spring 51 to the rear edge of the fixed lever 48, the coil spring 51 Therefore, the fixed lever 48 and the rotating shaft 22 are given a return rotational force in the counterclockwise direction in FIG. 8.

Thus, the case 18, the cover 20, and the rotating shaft 2
2, friction plates 31, 33, 34, guide member 39,
Rotating lever 40, fixed lever 48, coil spring 5
1 and the like form a rotation mechanism 52 for rotating the rotation arm 17 by a desired angle.

In this rotation mechanism 52, when no tensile force is acting on the cable 44, the coil spring 51
The fixed lever 48 is urged counterclockwise in FIG. 8 by the rotation urging force, and as shown in FIG. In the state of contact, the rotating lever 40, the fixed lever 48, and the rotating shaft 22 are stopped.

In this state, when the cable 44 is pulled downward by the drive mechanism 53, which will be described later, the rotating lever 40 is rotated clockwise in FIG.
Further, the fixed lever 48, the rotating shaft 22, the friction plates 31, 33, 34, the rotating arm 17, etc. are rotated together in the same direction by the protruding piece 40c,
The pivot arm is pivoted approximately 90 degrees from a downwardly facing inactive position to a forwardly facing activated position.

Thereafter, when the tensile force of the cable 44 is removed, the fixed lever 48, the rotating lever 40, the rotating shaft 22, and the friction plate 3 are moved by the urging force of the coil spring 51.
1, 33, 34, the rotating arm 17, etc. are rotated as one in the counterclockwise direction in FIG.
The pivot arm 17 is returned from the working position to its original non-working position.

As shown in FIGS. 1 to 4, FIG. 10, and FIG. 11, the drive mechanism 53 for pulling the cable 44 is entirely provided within the armrest 4b of the door 4.

That is, the drive mechanism 53
A base member 54 fixed to the inner panel 4c of the door 4 inside, a rotary plate 55 rotatably supported by the base member 54, a motor 56 fixed to the base member 54, and a motor 56 fixed to the base member 54. , and a reduction gear 57 that reduces the rotational force of the motor 56 and transmits it to the rotating plate 55, an engagement pin 58 protruding from an eccentric position of the rotating plate 55, and an upper end that is a base end of the rotating plate 55. At a position directly above the plate 55,
A link 61 is pivotally connected to the base member with a shaft 59 facing in the left-right direction, and has a long hole 60 facing in the longitudinal direction, into which the engaging pin 58 is slidably fitted, in the middle part. ing.

The lower end of the link 61 is fixed to the other end of the cable 44 which extends forward from the other end of the guide tube 47 which is fixed to the base member 54 with an appropriate fixing fitting 62 at the rear thereof. A cable end member 63 is pivotally mounted with a shaft 64 pointing in the left-right direction.

The rotating plate 55 and the link 61 are connected to the base member 54
The motor 56 is disposed on the inside surface of the vehicle.
The deceleration device 57 is disposed on the outer surface of the base member 54.

The speed reducer 57 includes, for example, a worm (not shown) linked to the rotating shaft of the motor 56 and a worm wheel (not shown) meshed with the worm and linked to the central shaft 65 of the rotary plate 55. Any known material may be used.

A notch 66 is formed at one location on the periphery of the rotating plate 55, and actuating pieces 67a, 68 are inserted into this notch.
A position control sensor 69 consisting of two limit switches 67 and 68 that is activated by engagement of the position control sensor 69 is fixed at a proper position on the base member 54.

For example, when the rotary plate 55 rotates clockwise in FIG. 10 from the state shown in FIG. 10, the position control sensor 69 switches one limit switch 67 from ON to OFF, and then switches the other limit switch 68 to OFF. OFF-ON-OFF,
Thereafter, it is detected that the limit switch 67 is turned on again, and the operation of the motor 56 is stopped, thereby causing the rotary plate 55 to rotate exactly once and stop at a fixed position.

A start switch (not shown) for starting the operation of the motor 56 is either a door switch (not shown) that is activated only at the moment the door 4 is closed, or a start switch (not shown) that is installed at a suitable location on the vehicle body within reach of the person sitting in the seat 1. It may be a manual switch (not shown), or a door switch and a manual switch may be installed in parallel.

The control circuit for the motor 56 may be such that the motor 56 is energized when the start switch is activated, and the position control sensor 69 is activated, for example, as described above, to stop energizing the motor 56. , may have any configuration. Further, the motor 56 may be one that can only rotate in one direction.

Thus, when the motor 56 is operated, the rotary plate 55 is rotated exactly one rotation in the clockwise direction in FIG. By rotating together with the plate 55 as a crank, it is reciprocated once from the stop position shown by the solid line in FIG. 10 to the tension position also shown by the imaginary line.

At this time, the link 61 has the engagement pin 58 at the tenth position.
During a rotation period of more than 180° clockwise from the position shown by the solid line in the figure to the position shown by the imaginary line, the engagement pin 58 makes one reciprocation and subsequently moves to the position shown in the phantom line in FIG. 10. It makes one reciprocation during a rotation period of less than 180 degrees from to the position shown by the solid line.

Therefore, when the rotational speed of the rotating plate 55 is constant, the link 61 makes a quick return movement, and when moving forward to pull the cable 44, it moves slowly with a strong force.
This is convenient because it moves at high speed during the return movement, which does not require a large amount of force.

Thus, the rotation mechanism 52, the drive mechanism 53, the cable 44, and the like form a drive device 70 that rotates the rotation arm 17.

Next, the overall operation of this first embodiment will be explained with reference mainly to FIGS. 12 to 14.

The rotating arm 17 is normally located behind the shoulder belt 10 that is hung on the shoulder through 13.
It is located in a hanging position facing downward.

In this state, when the door 4 is opened and the passenger is seated on the seat 1 from between the shoulder belt 10 and the seat 1, and the door 4 is closed, the shoulder belt 10 is gradually retracted by the retractor 11 and the passenger is seated on the seat 1. Gradually approach the position.

As shown in FIG. 12, even if the shoulder belt 10 were to get caught on the chest of the seated person 8 on its way to its normal position, the door switch (not shown) is activated at the same time as the door 4 is closed. As a result, the drive mechanism 53 is operated as described above, the cable 44 is pulled, and the rotating shaft 22 and the like are rotated clockwise in FIG. 8 on the rotating mechanism 52 side. By rotating the arm 17 from the non-operating position to the operating position, the above-mentioned catching of the shoulder belt 10 is released.

That is, when the rotating arm 17 rotates, the shoulder belt 10 is scooped up by the tip of the rotating arm 17 under the winding force of the retractor 11, and is directed to the normal position, that is, In this embodiment, if the direction is analyzed in three directions: top and bottom, front and back, and left and right of the vehicle body, the lift is upward, forward, and inward. With this, the shoulder belt 10 can be attached to the seated person 8.
It is removed from the chest, etc. of the seated person 8, and is securely attached to the proper position on the shoulder of the seated person 8.

When the rotating arm 17 is rotated back from the operating position to the non-operating position by the return movement of the link 61 in the drive mechanism 53 and the biasing force of the coil spring 51 in the rotating mechanism 52, the shoulder belt 10
As the rotating arm 17 returns, it is gradually wound up by the retractor 11, and when the rotating arm 17 returns to the non-operating position, it is reliably mounted in the normal position.

When the rotating arm 17 rotates, or the rotating arm 17
When the rotating arm 17 is stopped, the human body may hit the rotating arm 17,
Or, when a strong external force is applied to the shoulder belt 10, the friction plate 31 and the rotating arm 17, and the friction plate 34 and the friction plate 33 slide against each other,
The rotating arm 17 rotates relative to the rotating shaft 22 within a range between a non-operating position and an operating position,
If the human body is injured by the rotating arm 17,
Or it can prevent other things from being damaged.

The rotating arm 17 is connected to the rotating shaft 22 as described above.
If a positional deviation occurs between them due to relative rotation, the positional deviation is easily corrected by the first operation of the drive mechanism 53 thereafter.

That is, when the drive mechanism 53 is activated and the rotation shaft 22 is rotated clockwise in FIG. 8 from a state where the rotation arm 17 is stopped at a position other than the non-operating position, the rotation shaft 22 is Before the maximum rotation angle is reached, the right end surface of the arcuate groove 38 in FIG. By being rotated, the friction plate 31 and the rotating arm 17 and the friction plate 34 and the friction plate 33 slide on each other, and the rotating arm 17 is returned to its initial position with respect to the rotating shaft 22. Thereafter, when the rotating shaft 22 is rotated back to its original position, the rotating arm 17 reaches the non-operating position.

Note that when the rotating arm 17 is stopped at a position other than the non-operating position, the rotating arm 17 is forcibly rotated to the non-operating position with a force greater than the frictional force of the friction plates 31, 33, 34, etc. By doing so, the above positional deviation can also be corrected.

When the door 4 is opened, the shoulder belt 10 is let out from the retractor 11, pulled by the shoulder case 13, and moved forward away from the seated person 8. At this time, the seated person 8 can exit the vehicle by passing between the seat 1 and the shoulder belt 10.

FIG. 15 shows a second embodiment of the invention.

In the second embodiment, the same members as in the first embodiment are shown with the same reference numerals, and detailed explanation thereof will be omitted. The same applies to the third and fourth embodiments described later.

In the second embodiment, the rotating arm 17' is
The rotating mechanism 5 is attached to the inner surface of the pillar portion 7 of the vehicle body that can be engaged with the shoulder belt 10 when the door 4 is closed, in substantially the same manner as in the first embodiment.
2', drive mechanism 53', etc. are all provided on the vehicle body side,
When the door is closed, the pivot arm 17' pivots to draw the shoulder belt 10 toward its normal mounting position, ie, upwardly, forwardly, and inwardly.

With such a configuration, there is no need to provide the rotation mechanism 52', the drive mechanism 53', etc. on the door 4 side, so there is an advantage that the door 4 can be made lighter.

FIG. 16 shows a third embodiment of the invention.

In the third embodiment, a cable end member 63 fixed to the end of the cable 44 is attached to the shaft 80 at an eccentric position of the rotating plate 55 in the drive mechanism 53''.
The eccentric movement of the shaft 80 when the rotary plate 55 rotates once pulls the cable 44 and returns it to its original position.

With such a configuration, the structure can be made simpler than that of the first embodiment.

FIG. 17 shows a fourth embodiment of the invention.

In the fourth embodiment, the end of the cable 44 is fixed to the tip of the plunger 91 of the electromagnetic solenoid 90 fixed to the base member 54', and when the electromagnetic solenoid 90 is energized, the plunger 91
The cable is pulled by being moved from an inactive position, shown in solid lines, to an active position, shown in phantom lines.

92 is a limit switch that detects that the plunger 91 is in the inoperative position; 93;
is a limit switch that detects that the plunger 91 has reached the operating position and stops energizing the electromagnetic solenoid 90.

In the fourth embodiment, the drive mechanism 53 is configured as described above.
This has the advantage that the structure can be further simplified than those of the first and third embodiments described above, and miniaturization is also easy.

It should be noted that the present invention can be modified in many ways other than the above-described embodiments.

For example, the drive device may have a structure other than the above embodiment.

〔Effect of the invention〕

According to the present invention, even if the belt should get caught on the body or clothes of the person seated on the way to the normal wearing position, it can be easily removed or the risk of such getting caught can be eliminated, and the belt can be easily removed. To ensure that a belt is worn at a proper wearing position without giving an uncomfortable feeling of pressure to a seated person when wearing the belt.

Further, according to the present invention, when an external force greater than the frictional contact force between the rotating arm and the rotating shaft is applied to the rotating arm, the rotating arm can rotate relative to the rotating shaft. When a human body or other object directly collides with the rotating arm, or when it is caught by the belt, the rotating arm rotates relative to the rotating axis, either when rotating or stopping. , the impact at the time of a collision is alleviated, belts are prevented from being overtightened, and safety can be improved.

Furthermore, according to the present invention, the following effects can also be achieved.

(a) By installing a position control sensor in the drive device, in the unlikely event that the rotating arm collides with a human body or another object while the rotating arm is rotating, slippage may occur between the rotating arm and the rotating shaft. Even if this occurs, the operation of the drive unit will automatically stop after the drive unit has rotated the rotating shaft once by a predetermined amount of rotation. If you continue, the above inconvenience will not occur.

(b) If there is a collision with a human body, etc. when the rotating arm moves forward, the rotating arm will return to the non-operating position along with the rotating shaft when the rotating shaft returns, so the collision with the human body, etc. will be resolved immediately. to be resolved.

(c) In the case of (b) above, after the rotating arm returns to the non-operating position and contacts the stopper, the rotating shaft slides with the rotating arm and rotates further by a predetermined amount. The rotating arm and the rotating shaft automatically return to their initial states.

(d) Even if the rotating arm collides with a human body, etc. during the return movement of the rotating arm, or if the rotating arm is rotated from the non-operating position by an external force when the drive device is inoperative, the drive By providing the device with a position control sensor and a stopper for regulating the rotation range of the rotation arm, the rotation arm and rotation shaft are returned to the initial state by the first operation of the drive device. Restore easily.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of an automobile equipped with a passive seat belt device according to a first embodiment of the present invention, as seen from inside the vehicle, FIG. 2 is a schematic side view, and FIG. 3 is a schematic rear view. Fig. 4 is an exploded perspective view of the main parts, Fig. 5 is a partially cutaway side view of the rotating arm and rotating mechanism seen from inside, and Fig. 6 is A of Fig. 5.
- Longitudinal sectional view along line A, Figure 7 is B- in Figure 5.
The longitudinal cross-sectional view along line B, FIG. 8, is taken from C-C in FIG. 6.
9 is a longitudinal sectional view taken along the line D-D in FIG. 6, FIG. 10 is a side view of the drive mechanism, and FIG. 11 is a longitudinal sectional view taken along the line EE in FIG. 10. 12 to 14 are schematic perspective views for explaining the operation of the present invention, and FIG. 12 shows the state when the shoulder belt is hooked on the chest of the seated person. Figure 13 shows the state when the rotating arm rotates and pulls the shoulder belt toward the normal wearing position, and Figure 14 shows the state when the shoulder belt is worn in the normal wearing position. FIG. 15 is a schematic perspective view of an automobile equipped with a seat belt device according to a second embodiment of the present invention as seen from inside the vehicle, and FIG. 16 is a diagram showing a drive mechanism according to a third embodiment of the present invention. FIG. 17 is a side view showing a drive mechanism according to a fourth embodiment of the present invention, and FIG. 18 is a schematic perspective view of an automobile equipped with a conventional seat belt device as seen from inside the vehicle. 1...Seat, 4...Door, 4a...Tower section, 4b
... Armrest, 8 ... Seated person, 10 ... Shoulder belt (belt), 11 ... Retractor, 16 ... Buckle device, 17, 17' ... Rotating arm, 22 ... Rotating shaft,
31, 33, 34...Friction plate, 39...Guide member,
40... Rotating lever, 44... Cable, 47... Guide tube, 48... Fixed lever, 51... Coil spring, 52, 52'... Rotating mechanism, 53, 53', 5
3″, 53... Drive mechanism, 54... Base member, 5
5... Rotating plate, 56... Motor, 57... Reduction device, 5
8... Engagement pin, 61... Link, 69... Position control sensor, 70... Drive device.

Claims (1)

[Claims] 1. One end of the belt is locked to the vehicle body side on one side of the seat, and the other end is locked to a locking part on the door side of the other side of the seat, and the belt A retractor is provided at the end of the belt that winds the belt with a predetermined winding force, and the belt is rotated from the non-operating position to the operating position near the locking part on the other side of the sheet. A rotating arm that can be attached to the shoulder at the mounting position is provided so that it can be rotated freely.
Furthermore, in the passive seat belt device for a vehicle, which is configured to restrain a person seated on the seat when the door is closed by providing a drive device that rotates the rotary arm, the rotation range of the rotary arm is set as follows: A stopper is provided for limiting between a downwardly facing non-actuating position and a forwardly facing operative position, and the rotating arm is coupled by frictional contact with a rotary shaft rotated by the drive device, and the rotational arm is coupled with a rotating shaft rotated by the drive device, and the rotational arm is connected to a rotary shaft rotated by the drive device, and a force greater than this frictional contact force is provided. By applying an external force to the rotating arm, the rotating arm and the rotating shaft are allowed to rotate relative to each other. A passive seat belt device for a vehicle, comprising a position control sensor that stops the operation of a drive device by reciprocating the amount of rotation corresponding to one reciprocating amount of rotation from to an operating position. 2. The passive seat belt device for a vehicle according to claim 1, wherein the rotating arm is attached to the inner surface of the upper part of the door, and the belt is pulled upward and forward by rotation of the rotating arm. 3. The passive seat belt device for a vehicle according to claim 2, wherein the rotating arm is mounted at an inclined angle with respect to the mounting surface of the door. 4. The passive seat belt device for a vehicle according to claim 2 or 3, wherein the rotation axis of the rotation arm is inclined with respect to the mounting surface of the door.