JPH0472739B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a passive seatbelt device in which a seatbelt is automatically fastened when an occupant gets into the vehicle. The present invention relates to a device in which a seat belt is fastened and released by opening and closing a door.

(Prior Art) Conventionally, as a passive seat belt device, the one described in, for example, Japanese Utility Model Application Publication No. 56-56451 is known.

This conventional device is installed in an automobile, and includes a chest belt that is worn diagonally from the shoulder to the waist of an occupant, and one end of the chest belt is locked to a locking part on the vehicle body side in the center of the vehicle floor. In addition, the other end is locked to a door-side locking part provided at the upper rear end of the door, which is located behind the occupant's shoulders when the door is closed, and the tip of the locking part is located at the bottom of the door. It was installed in a winding device so that it could be wound up.

Therefore, when the door is open, the door-side locking portion of the chest belt is located on the outside of the vehicle and in front of the vehicle together with the door, and is completely detached from the passenger and ready for boarding and alighting.

In addition, when a passenger gets in the car and closes the door, the door-side locking part is placed behind the passenger's shoulders as the rear end of the door moves, and the chest belt automatically connects from the passenger's shoulders to the waist. be installed.

(Problems to be Solved by the Invention) However, such conventional passive seat belts have the following problems.

The chest belt is attached by the door-side locking portion moving from the front side of the vehicle body to the rear of the occupant as the door rotates.

Therefore, when the door is closed, the chest belt tends to come into contact with the door side of the shoulder, that is, the upper arm, instead of contacting the upper side of the shoulder, which is the normal wearing position. Due to frictional force, the device may end up being worn in this position on the upper arm.

Therefore, the passenger has to re-fasten the chest belt every time he or she wears the belt, which poses a problem in that this task is troublesome.

(Means for Solving the Problems) The present invention has been made for the purpose of solving the above-mentioned problems, and in order to achieve this purpose, in the present invention, one end side of the chest belt is attached to the upper part of the door. A winding mechanism that winds up the chest belt with a predetermined winding force is connected to the end of the chest belt. In a passive seat belt device, the chest belt is installed diagonally from the upper side of the shoulders to the waist of an occupant when the door is closed, and the chest belt near the door side locking portion is moved in the front and back direction. In order to temporarily release the chest belt from the shoulder, a release mechanism that moves from the normal position to the release operation position and performs the release operation is provided near the door-side latch, and is operated at all times, including when the door is opened. The means is provided with an actuating device that positions the detachment mechanism at the normal position, operates the detachment mechanism when the door is closed, and then returns the detachment mechanism from the detachment operation position to the normal position.

(Function) In the passive seat belt device of the present invention, since the above-mentioned means are used, the disengagement mechanism performs disengagement operation by the actuating device when the door is closed.

Therefore, even if the chest belt is caught on the side of the shoulder such as the upper arm when the door is closed, the chest belt can be moved to the door-side locking area by the release operation of the release mechanism. By moving the nearby part in the front-back direction and temporarily detaching it from the shoulder, the frictional force acting between the two is removed, and the winding mechanism is activated to wind up the chest belt and remove it from the shoulder. The belt is in its normal state, hanging over the upper part of the shoulder.

In addition, the release mechanism operates only when the door is closed, and does not operate when the door is opened. Therefore, when the release mechanism operates, the winding force of the take-up mechanism is reduced, and the release mechanism is released. The operating force is small, and the release mechanism does not get in the way when getting on and off with the door open.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 6 show a first embodiment of the present invention, and first, the configuration of this first embodiment will be explained.

The passive seat belt device of the first embodiment is provided in a seat 102 for a driver's seat of an automobile.
As shown in the figure, a chest belt 10, a through ring (locking part on the door side) 20, a locking device (locking part on the vehicle body side) 30, a detachment mechanism 40, an operating circuit (actuating device)
50 is the main configuration.

As shown in FIGS. 4 and 5, the chest belt 10 is worn diagonally around the occupant P from the upper side of the shoulder S on the side closer to the door 101 to the waist B on the side farther from the door 101. It is installed and crew member P
This is used to tie and fasten it to the sheet 102.

Note that the door 101, as shown in FIG.
It is provided beside the seat 102 and extends slightly behind the seat 102, and has a structure in which a sash portion 106 is erected only on the rear side of the window glass 105.

One end of the chest belt 10 is wound up with a predetermined winding force by a belt winding mechanism 60 installed in the lower part of the rear end of the door 101. searched,
is guided into the vehicle compartment at the upper position of the sash portion 106,
The sash portion 106 is inserted and locked into a through ring 20 as a door-side locking portion provided at the upper end position of the sash portion 106. So, this chest belt 1
The door 101 side of No. 0 is locked at a position slightly rearward of the seat bag 103 when the door 101 is closed.

Further, the other end of this chest belt 10 has a tongue 11.
It is detachably attached to a locking device (vehicle body side locking part) 30 fixed to the vehicle body near the center side of the vehicle body at the rear end of the seat 102. still,
The tongue 11 and the lock device 30 are provided so that the chest belt 10 can be unlocked from the vehicle body in an emergency, and normally remain locked.

The belt winding mechanism 60 also includes an ELR (emergency) mechanism that fixes the belt when acceleration is applied.
A known mechanism having a built-in locking retractor is used.

Therefore, when the door 101 is opened, the through ring 20 at one end of the chest belt 10 moves forward and to the side with respect to the vehicle body as the door 101 rotates, so that the chest belt 10 is in a state where it does not interfere with the passenger P getting on and off. When the door 101 is closed after P gets on the vehicle, the through ring 20 moves behind the shoulder S of the occupant P and is automatically attached obliquely from the shoulder S to the waist B, as shown in FIG. The state shown in FIG. 6 is the state of the chest belt 1.
0 is the normal installed state.

The detachment mechanism 40 temporarily detaches the chest belt 10 from the shoulder S of the occupant P, and the detachment mechanism 40 includes a swing arm 41, an electric motor 4
2, a conversion mechanism 43, a drive transmission wire 44, and an arm drive section 45.

As shown in FIGS. 1 and 2, the swing arm 41 has a support shaft 4 provided at the upper end of the sash portion 106, which is the supporting position of the through ring 20.
The proximal end is supported so as to be swingable about 11 as a fulcrum,
In addition, an engaging portion 412 is formed at the distal end, which can engage the chest belt 10 routed from the through ring 20 toward the locking device 30.

This swing arm 41 is driven by an electric motor 42, and the armrest 10 is configured to swing within a range of about 90 degrees from a normal position a to a detachment operation position b.
The rotation of the electric motor 42 is converted into a slide in the front and back direction by a conversion mechanism 43, and this slide is connected to an arm provided on a support shaft 411 by a drive transmission wire 44. The movement is transmitted to the drive unit 45, and the arm drive unit 45 converts the slide into approximately 90° rotation of the support shaft 411, causing the swing arm 41 to swing.

As shown in FIG.
31, and a link 432 that converts the rotation of this cam 431 into swinging in the front-back direction.

The release mechanism 40 is operated by an operating circuit 50 shown in FIG. 3 when the door 101 is closed.

This operating circuit 50 is a cam 43 of the conversion mechanism 43.
a first position switch 51 and a second position switch 52 that are opened and closed in accordance with the rotational position of the door 10;
a first relay switch 54 that is activated when the door switch 53 is opened and switches from the door close terminal 541 to the door open terminal 542;
2 and a battery 56.

It should be noted that both position switches 51 and 52 are constructed so that both are not opened at the same time.

That is, the first position switch 51 is a switch that is opened only after the cam 431 has rotated for one cycle of swinging of the swing arm 41, that is, the disengagement operation, and the second position switch 52 is a switch that is opened only when the first position switch 51 is This switch is opened only after the cam 431 rotates very slightly from the open state to the closed state.

Therefore, when the door 101 is open, the door switch 53 is closed, the first relay switch 54 is on the door open terminal 542 side, the first position switch 51 is closed, and the second position switch 52 is open.

Then, when door 101 is closed, door switch 5
3 is opened, the first relay switch 54 is switched to the closed terminal 541, and the second relay switch 55 is switched to the closed terminal 541.
is activated, and the electric motor 42 is driven. The drive of the electric motor 42 is stopped when the cam 431 rotates a predetermined amount, the swing arm 41 is disengaged, and the first position switch 51 is opened.

In this stopped state, the second position switch 52 is in a closed state. So next time you open door 101,
The door switch 53 is closed, and the relay switch 5
4 is switched to the door opening terminal 542, the electric motor 42 is driven until the second position switch 52 is opened and at the same time the first position switch 51 is closed, in preparation for the next disengaging operation.

In FIG. 1, 70 indicates a waist belt. As shown in FIGS. 4 to 6, this waist belt 70 ties the passenger's waist B to the seat 102.
One end is wound up by a winding device (not shown) provided on the vehicle body, and the other end is provided with a tongue 71 and can be attached to and removed from a locking device 72.

Next, the operation of the embodiment will be explained.

As described above, when the door 101 is opened and the occupant P gets into the vehicle, the chest belt 10 is automatically attached.

However, this chest belt 10 is attached by the through ring 20 serving as a door-side locking portion going around from the outer side of the front of the vehicle body to the rear of the occupant P as the door 101 is rotated to close. As shown in , the chest belt 10 contacts the side of the shoulder S (upper arm), and the frictional force between the chest belt 10 and the shoulder S exceeds the winding force of the belt winding mechanism 60, and the belt is worn in this state. Sometimes it happens.

However, in this device, the swing arm 41 performs a detachment operation in conjunction with the closing operation of the door 101, and swings back and forth from the normal position a to the detachment operation position b.

Therefore, the chest belt 10 located near the through ring 20 that is locked to the swing arm 41 temporarily moves forward and upward, and this temporary movement causes the chest belt 10 to move as shown in FIG. Since it is temporarily separated from the shoulder S and the frictional force acting between them is removed and moved upward at the same time, when the swing arm 41 returns to its original position and is wound up by the belt winding mechanism 60. Then, the chest belt 10 is attached to the shoulder S from above, and is attached in the normal state shown in FIG. 6.

As explained above, in the passive seat belt device of the first embodiment, the chest belt 10
Even if it is worn in contact with the side of the shoulder S,
Since the detachment mechanism 40 automatically performs the detachment operation immediately and the belt is installed in the normal state, there is an advantage that there is no need to re-fasten the belt one by one.

By the way, the belt winding mechanism 60 has a structure in which the winding force increases as the amount of the chest belt 10 that is pulled out increases. Therefore, in this embodiment, since the disengagement mechanism 40 is operated to disengage when the door is closed, the operating force required at this time is smaller than when the disengagement mechanism is operated when the door is opened, and the electric motor 42 can be made more compact by reducing its output. In addition, the detachment mechanism 40 does not operate when the door is opened and the swing arm 14 remains overlapped with the sash portion 106, so the detachment mechanism 40 does not interfere with getting on and off the vehicle.

Furthermore, in the first embodiment, the through ring 20, which is the door-side locking mechanism, and the swing arm 41 of the detachment mechanism 40 are provided in the sash section 106 that stands up at the rear end of the door 101. For example, targa roof type and T
The present invention can be applied to vehicles with a bar roof that opens over the entire width of the roof, and vehicles with no sash in front or above the window.

Next, a second embodiment shown in FIG. 7 will be described.

In this embodiment, the detachment mechanism 240 is provided on the pillar 200 behind the door 101, and the swing arm 240 is provided on the pillar 200 behind the door 101.
41 is provided at the top of the pillar 200. Therefore, the degree of freedom in wiring the electric motor and wires, etc. increases.

Note that the other configurations and operations are the same as in the first embodiment.

Next, a third embodiment shown in FIG. 8 will be described.

In this embodiment, in front of the window glass 300,
Door 30 with a sash 301 on the top and rear side
2, the slide arm 341 of the detachment mechanism 340 is provided in the sash 301 in the vicinity of the through ring 20 so as to be slidable back and forth, and the drive transmission wire 344 that transmits the drive force to the slide arm 341 is arranged inside the sash 301. being searched.
Note that the other configurations are the same as in the first embodiment. Therefore, even in this third embodiment, it is possible to obtain the effect that there is no trouble in re-hanging the belt.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments. In the embodiments, an example in which a swing arm is used as a detachment mechanism has been shown, but for example, As described above, the detachment operation is performed by swinging the member that supports the through ring and moving the through ring forward and upward.This detachment mechanism involves moving the belt near the door side locking mechanism in the front and rear direction. Any mechanism may be used as long as it allows the chest belt to be detached from the shoulder of the occupant.

Further, in the embodiment, the disengagement mechanism is operated by an electric motor, but other driving means such as a solenoid, or a mechanism that operates using the movement energy of the door when the door is closed as a driving force, such as a door A mechanism operated by a link that rotates when the door is closed or a spring that is shortened or expanded when the door is closed may be used. In that case, the actuating device becomes the input part for the movement energy of the door.

(Effects of the Invention) As explained above, the passive seat belt device of the present invention is provided with a detachment mechanism that performs a detachment operation to temporarily detach the chest belt from the shoulder of the occupant when the door is closed. Since this means that the chest belt is automatically re-fastened when the door is closed, there is no need for the occupant to have to re-fasten the belt one by one.

In addition, since the release mechanism operates when the door is closed, the release force of the release mechanism is small, allowing the release mechanism to be made compact, and the release mechanism does not get in the way when getting on or off the vehicle. The effect is that it does not happen.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a passive belt device according to the first embodiment of the present invention, FIG. 2 is a side view showing the main parts of the device of the first embodiment, and FIG. 3 is a circuit showing the main parts of the device of the first embodiment. 4 to 6 are explanatory diagrams showing the operation of the device of the first embodiment, FIG. 7 is a perspective view of the device of the second embodiment, and FIG. 8 is a perspective view of the device of the third embodiment. be. DESCRIPTION OF SYMBOLS 10... Chest belt, 20... Thru ring (door side locking part), 30... Lock device (vehicle body side locking part), 40... Release mechanism, 50... Operating circuit (actuating device), 60... ...Belt winding mechanism, 101...
...door, 102...seat.

Claims (1)

[Scope of Claims] 1. One end of the chest belt is locked to a door-side locking part on the upper part of the door, and the other end is locked to a center-side locking part of the floor of the vehicle body including the seat, and the chest belt is held in a predetermined position. A passive seatbelt device in which a winding mechanism that winds up using a winding force is provided at an end of the chest belt, and the chest belt is worn diagonally from the upper side of the shoulder to the waist of the occupant when the door is closed. The door side locking part has a release mechanism that moves the chest belt near the locking part in the front and back direction to temporarily release the chest belt from the shoulder, and moves from the normal position to the release operation position to perform the release operation. Provided nearby, the release mechanism is always located at the normal position, including when the door is opened, and when the door is closed, the release mechanism is operated to release and then returned to the normal position from the release operation position. A passive seat belt device, characterized in that it is provided with an actuating device for moving the seat belt.