JPH02102851A - Seat belt device - Google Patents

Abstract

PURPOSE:To eliminate an unsatisfactory feeling during wearing of a seat belt by providing such an arrangement that an abnormal slack condition and a stretched condition of the seat belt are detected in accordance with a rotational displacement of a buckle so as to remove a slack in the seat belt and to eliminate a stretched condition, and thereafter, a suitable slack condition is given to the seat belt. CONSTITUTION:When a passenger A sitting on a seat 5 fits a tongue 3 into a buckle 7 so as to wear a seat belt 1, a switch 10 is turned on, and accordingly, a rotary solenoid 9 is rotated by means of a control means so that the buckle 7 is displaced. In this phase, if the seat belt 1 abnormally slackens, the buckle 7 is rotationally displaced to a position 7' so that a switch 11 is turned on, and accordingly, a motor 8a in a retractor 8 is driven in a seat winding direction so that an abnormal slack in the seat belt 1 is removed. Further, when the buckle 7 returns to its original position so as to turn off the switch 11, the motor 8a is driven in the reverse direction, thereby it is possible to give a suitable slack to the seat belt 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a seat belt device used in, for example, automobiles, aircraft, etc., and capable of restraining an occupant in a seat with a seat belt.

<Prior Art> Conventionally, automobiles and the like are equipped with seat belt devices that ensure safety by restraining the occupant's body to the seat in the event of an emergency such as a collision.

An example of such a seat belt device is shown in FIG.

The seatbelt device shown in the figure includes a belt retractor 2 fixed to a strength member of a heavy body 6 and retracting and retracting the seatbelt 1, and one side surface 5a of the seat 5.
A part of the tongue 3 loosely inserted into the middle part of the seat belt 1 is connected to the buckle 4, whereby the occupant P is restrained to the seat 5. That's what I do. Note that the open end (not shown) of the seat belt 1 is fixed to the other side of the seat 5.

(Problems to be Solved by the Invention) By the way, the belt retractor 2 in the conventional seat belt device described above is configured such that a force that retracts the seat belt 1 that has been pulled out is always applied. Therefore, when the occupant P is restrained in the seat with the seat belt 1, the occupant P always feels pressure from the seat belt 1.

However, the occupant P generally tends to dislike this feeling of pressure, and in order to eliminate this feeling of pressure, the seat belt 1 is pulled out abnormally as shown by 1' in the figure, that is, the seat belt 1 has an abnormal slack. There was a problem in that the operation continued with a certain amount of water.

In addition, in the case of a retractor with a tensionless mechanism configured so that the winding does not exceed a set length by the operation of a solenoid, this state can easily occur, so it is necessary to intentionally set it to the above-mentioned state. This is a problem that can occur not only due to accidental use, but also due to misuse.

However, if an emergency situation such as a collision occurs when the seat belt 1 is abnormally pulled out, the occupant P cannot be effectively restrained in the seat 5, and the safety of the occupant P cannot be ensured. There was a serious problem.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned problems, the present invention aims to provide a seatbelt device that eliminates the discomfort caused by wearing a seatbelt and can effectively restrain the occupant.

[Structure of the Invention] (Means for Solving the Problems) The structure of the present invention for achieving the above object includes a belt retractor that retracts and retracts a seat belt and stores the seat belt, and a seat belt that is pulled out from the belt retractor. A seatbelt device capable of restraining an occupant to a seat, which includes a connecting member loosely inserted into the intermediate portion of the seat belt, and a buckle formed to be connectable and rotatably attached to the seat, and capable of restraining an occupant in the seat.
A first detection means detects an abnormal slack state of the seatbelt by rotational displacement of the buckle, a second detection means detects a tension state of the seatbelt, and a detection output from the second detection means detects the seat belt. The seat belt is provided with a slackening means for releasing the tensioned state of the belt and giving an appropriate amount of slack to the seatbelt, and a control means for controlling each of the above-mentioned means.

In this case, instead of using the first detection means and the second detection means, an abnormal slack state or tension state of the seat belt is detected based on the loose insertion state of the seat belt portion from the belt retractor to the connection member into the connection member. It may also be used as a detection means, and instead of the first detection means and second detection means described above, it includes a coupling part that couples the coupling member, and a support part that slidably supports this coupling part, The detection means may detect an abnormal slack state or tension state of the seat belt based on the sliding displacement of the coupling part with respect to the support part.

(for production) The operation of the present invention having the above configuration will be explained.

In the seat belt device according to claim 1, for example, an abnormal slack state and a tension state of the seat belt are detected by rotational displacement of a buckle, and the slack of the seat belt is removed;
Moreover, after the tension state of the seat belt is released, an appropriate amount of slack is given to the seat belt. Therefore,
The seat belt does not put pressure on the occupant's body, thereby eliminating the occupant's discomfort caused by wearing the seat belt, and effectively restraining the occupant.

Claim 2. In the seat belt device according to claim 3, an appropriate amount of slack is given to the seat belt in the same manner as described above by loosely inserting the seat belt into the connecting member or by sliding displacement of the connecting portion with respect to the support portion. . Even with such a seat belt device according to claim 2 or claim 3, the same effects as in claim 1 can be obtained.

(Example) The present invention will be described below with reference to the drawings. In each embodiment of the present invention, the same reference numerals are given to the same parts as those explained in FIG. 6, and detailed explanation thereof will be omitted.

FIG. 1 is an explanatory diagram showing one embodiment of the seat belt device, and FIG. 2 is an enlarged explanatory diagram of the portion indicated by A in FIG. 1.

The seat belt device shown in FIGS. 1 and 2 has a motor 8
A belt retractor 8 equipped with The buckle 7 is movably attached.

The buckle 7 is rotatable within a range of about 90 degrees around the axis O, as shown in FIG.
This buckle 7 has the functions of a first detection means for detecting an abnormal slack state of the seat belt 1 and a second detection means for detecting a tension state of the seat belt 1 by rotational displacement of the buckle 7. a switch 11 equipped with a switch 11, a switch 10 built into the buckle 7 that detects the connection of the tongs 3, and a detection output from the switch 10 to allow the buckle 7 to freely rotate within the rotation range,
Further, a rotary solenoid 9 is attached to return the device to the initial position (in the vertical direction). Note that 7' in FIG. 2 indicates the rotational displacement state of the buckle 7.

Here, the abnormal loosening of the seat belt 1 means the seat belt 5
This refers to a state where the seat belt is abnormally loosened, such as when the occupant P is restrained by the seat belt 1 during a collision, and the occupant P is separated from the seat 5 and struck against a front window (not shown), for example, in the event of a collision. .

In this embodiment, the buckle 7 has an arc-shaped protrusion 7a' having an angle of about 90 degrees in the initial position on the outer peripheral surface 7C of the lower part 7b, and the switch 11 comes into contact with this protrusion 7a'. The buckle 7 is arranged so that the 0N10FF state is switched depending on the rotational displacement state of the buckle 7.

By the way, the belt retractor 8 shown in FIG. 1 releases the tension state of the seat belt 1 based on the detection output from the switch 11 as a second detection means, and also provides slack to give the seat belt 1 an appropriate amount of slack. The above-mentioned motor 8a is provided as a means. Here, the term "appropriate slackness" refers to a state in which the seat belt 1 does not apply pressure to the occupant P, and the occupant P can be safely restrained in the seat 5.

The rotating shaft (not shown) of the motor 8a is a reel shaft (not shown) to which one end of the seat belt 1 is fixed.
It is fixed to , and can be driven clockwise or counterclockwise depending on the 0N10FF state of the switch 11. Therefore, the seat belt 1 is unwound or rewound from the belt retractor 8 depending on the direction of rotation of the rotary wheel.
Thereby, the amount of slack in the seat belt 1 is adjusted.

Note that, although the switch 11 is used to detect the abnormal slack state and tension state of the seat belt 1, the switch 11 is not limited to this, and may be configured to detect only the abnormal slack state of the seat belt 1.

FIG. 3 is a block diagram of the circuit configuration of the seat belt device described above.

As shown in the figure, the above-described seat belt device includes a control means C0NT that inputs signals output from the switch 10 and the switch 11, and a signal from the control means C0NT that rotates the motor 8a in forward and reverse directions. The rotary solenoid 9 is configured to include a motor driving section 12 for driving, and a solenoid driving section 13 for driving or non-driving the rotary solenoid 9 according to an output signal from the control means C0NT.

The functions and effects of the seat belt device configured as described above will be explained with reference to FIGS. 1 to 3.

An occupant P sits on a seat 5 and inserts the tongue 3 into the buckle 7 to fasten the seat belt 1.

Then, the switch 10 is turned on, a signal is output from the control means C0NT, and the rotary solenoid 9 is made rotatable by the solenoid drive section 13.
The buckle 7 can be rotated.

In such a case, when the seat belt 1 is abnormally slack, the buckle 7 is rotated as shown by 7' in FIG. 2, for example. Therefore, the switch 11 is pressed down by the protrusion 7 a I provided on the buckle 7 and turned ON.
In response to a signal from the control means C0NT that has determined this state, the rotating shaft of the motor 8a is driven by the motor drive unit 12 in the direction in which the seat belt 1 is wound up. This eliminates abnormal slack in the seat belt 1.

Thereby, the seat belt 1 is wound up until it comes into close contact with the body of the occupant P, and becomes in a tensioned state. In this case, the buckle 7 rotates back to the initial position as the seat belt 1 is wound up.

Then, when the buckle 7 returns to the substantially initial position, the switch 11 is separated from the protrusion 7 a / to be in the OFF state.

The control means C0NT determines this and sends a signal to the motor drive unit, which causes the motor 8 to be activated via the motor drive unit 12.
The seat belt a is rotated in a direction opposite to the above-mentioned rotation direction, and rewinds the seat belt 1 by a predetermined length. That is, an appropriate amount of slack is given to the seat belt 1.

Therefore, the occupant P does not receive pressure from the seat belt 1,
I don't feel any discomfort. Furthermore, it is possible to prevent the vehicle from continuing to drive with the seat belt 1 pulled out abnormally, that is, with the seat belt 1 having an abnormal amount of slack. Therefore, even if an emergency situation such as a collision occurs in the above state, the occupant P can be effectively restrained to the seat 5, and the safety of the occupant P can be sufficiently ensured.

FIGS. 4(a) and 4(b) are a front view and a side view showing another embodiment of a buckle attached to the seat 5 and a tongue connected to the buckle.

The illustrated tongs 16 have the same external structure as the tongs 3, but instead of the first detecting means 10, the second detecting means 11, the rotary solenoid 9, etc., the tongs 16 extend from the belt retractor 8. The difference is that a switch 17 is incorporated as a detection means for detecting an abnormal slack state or tension state of the seat belt 1 depending on the loose insertion state of the seat belt 1 portion into the tongue 16. This switch 17 also has conductive wires 17a and 1 built-in.
7b is connected to this conductive wire 17a.

The open end of 17b is electrically connected to a connector 18 and a conductive metal insertion part 16a, and is connected to the motor drive unit via conductive wires 15a and 15b built into the buckle 14 that connects the tongue 16. That's what I do. Note that the buckle 14 is fixedly attached to one side of the seat 5, unlike the embodiments described above. In addition, 19 in the figure is a connector for electrically connecting the metal insertion portion 16a and the conductive wire 15b.

Detection of an abnormal slack state or tension state of the seat belt 1 using the switch 17 is performed as follows.

In FIG. 4(b), when the seat belt 1 is at the position indicated by 20, the seat belt 1 is in an abnormally slack state. On the other hand, when the seat belt 1 is located at the position indicated by 21 in the figure, the seat belt 1 is in close contact with the rest area of the occupant P and is in tension. Taking into consideration the angle of the seat belt 1 with respect to the tongue 16, the switch 17 is set to be in the ON or OFF state when the seat belt 1 is at the position indicated by 20 above, and in this case, the motor 8a is turned on. Start it up and wind up the seat belt 1. Then, when the seat belt 1 is at the position indicated by 21 in the figure, the motor 8
A may be stopped, and the seat belt 1 may be unwound by a predetermined amount in the same manner as described above, thereby giving the seat belt 1 an appropriate amount of slack.

With such a configuration, it is possible to obtain the same effects as in the embodiment described above, and it is also possible to have a simpler configuration than in the embodiment described above. Therefore, it is considered possible to provide a cheaper seat belt device.

FIG. 5 is an explanatory diagram showing another embodiment of the buckle attached to the seat 5 and the tongue tongue connected to the buckle.

The illustrated buckle 22 includes a guide member 23 that is a support portion fixed to the seat 5, and a sliding member 29 that is a coupling portion that is movably supported by the guide member 23. and guide member 22 are biased in the direction of arrow B via a spring member 24. In addition, 3 in the figure is a tong.

The sliding member 29 includes a grip portion 26 and an insertion portion 28 having an elongated hole 27 formed in the center, into which the anchor bolt 23b provided at the insertion end of the guide member 23 is inserted. . Further, the spring member 24 has one end connected to the guide member 2.
3, and the other end is a bolt 23a at the end of the insertion portion 28.

It is fixed by 28a.

Roughly speaking, the insertion end of the sliding member 29 of the guide member 23 of the buckle 22 has a connecting part (sliding part) to the support part (guide member) 23 instead of the first detecting means and the second detecting means. Seat belt 1 due to sliding displacement of moving member) 29
A switch 25 is attached as a detection means for detecting an abnormal loosened state or tensioned state.

With this configuration, when the seat belt 1 is in an abnormally slack state, the sliding member 29 is pulled in the direction of arrow B by the spring member 24, and the grip portion of the sliding member 29 is pulled. 26 presses the switch 25, and the seat belt 1 is wound up by the motor 8a (in the direction of arrow C). and,
When the anchor bolt 23b comes into contact with one end of the elongated hole 27, the motor 8a rotates in a direction to unwind the seat belt 1, giving the seat belt 1 an appropriate amount of slack.

With the seat belt device having the above configuration, the same effects as those of the embodiments described above can be obtained, and in particular, the buckle can be easily operated.

It should be noted that the present invention is not limited to the illustrated embodiments described above, and various modifications can be made within the scope of the gist thereof.

For example, in each of the above-described embodiments, the seatbelt is given an appropriate amount of slack, but the seatbelt may simply be released from the tensioned state.

In this case as well, the same effects as described above can be obtained. Moreover, when a retractor with a tensionless mechanism operated by a solenoid is used instead of a retractor with a motor, abnormal loosening of the seat belt due to misuse can be avoided.

[Effects of the Invention] According to the present invention described in detail above, it is possible to provide a seatbelt device that can eliminate the discomfort of the occupant due to wearing a seatbelt and can effectively restrain the occupant.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a state in which a seat belt device according to an embodiment of the present invention is attached to a car and an occupant is restrained in a seat; FIG. 2 is an enlarged perspective view of the buckle shown in FIG. 1 and its vicinity; The figures are respectively circuit configuration block diagrams of the seat belt device shown in Fig. 1, Fig. 4<8) and (b) are front and side views showing other embodiments of the buckle and tongue, and Fig. 5 is the buckle. FIG. 6 is an explanatory diagram showing another embodiment of the present invention, and FIG. 6 is an explanatory diagram showing a state in which a conventional seat belt device is attached to a vehicle and an occupant is restrained in a seat. 1...Seat belt, 3,16...Tongs, 7.
14... Buckle, 8a... Loosening means, 11.
17.25...1st. Second detection means, P...Occupant, C0NT...Control means.

Claims (3)

[Claims] (1) A belt retractor that retracts and unwinds the seatbelt, and a connecting member that is loosely inserted into the middle of the seatbelt pulled out from the belt retractor, and is rotatable to the seat. a seatbelt device capable of restraining an occupant on a seat, the seatbelt device comprising a buckle attached to the seatbelt, the seatbelt device comprising: a first detection means for detecting an abnormal loosening state of the seatbelt by rotational displacement of the buckle; and a tensioning of the seatbelt. a second detection means for detecting the state; a slackening means for releasing the tensioned state of the seatbelt based on the detection output from the second detection means and giving an appropriate amount of slack to the seatbelt; and each of the above-mentioned means. A seat belt device comprising a control means for controlling the seat belt. (2) In the seat belt device according to claim 1, in place of the first detection means and the second detection means, the seat belt is detected by the loose insertion state of the seat belt portion from the belt retractor to the connection member into the connection member. A seat belt device equipped with a detection means for detecting an abnormal slack state or tension state. (3) In the seat belt device according to claim 1, in place of the first detection means and the second detection means, a coupling part for coupling the coupling members and a support part for slidably supporting the coupling part are provided. A seat belt device comprising: a detecting means for detecting an abnormal loosening state or tension state of the seat belt by sliding displacement of a connecting portion with respect to a supporting portion.