JP2008143457A - Seat belt control device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt control device for a vehicle that can improve the safety of passengers taking rear seats with forwardly-foldable seat backs. <P>SOLUTION: The seat belt control device includes rear seats 40L and 40R having forwardly-foldable seat backs, lock means 5L and 5R for locking the seat backs in standing postures, lock detecting means 7L and 7R for detecting whether the seat backs are locked by the lock means, seat belt wearing detection means 8L, 8C, and 8R for detecting whether the passengers are wearing the seat belts 3L, 3C, and 3R to be wound up by retractors 6L, 6C, and 6R provided to the seat backs, and an alerting means 9 for alerting if the lock detecting means detect the condition in which the seat backs are not locked by the lock means, and if the seat belt wearing detection means detect the condition in which the passengers are wearing the seat belts. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle seat belt control device, and more particularly, to improve the safety of an occupant seated on a rear seat having a seat back in which a seat bag can be tilted forward and a seat belt retractor is incorporated. The present invention relates to a vehicle seat belt control device capable of achieving the above.

  Conventionally, a seat belt device has been used as a safety device for protecting a vehicle occupant in the event of a collision between a vehicle and an obstacle. The seat belt device restrains the occupant so as to prevent the occupant from being thrown forward when the vehicle collides with an obstacle ahead.

  A seat belt warning device that detects the wearing state of a seat belt and notifies a passenger is disclosed in Patent Document 1 below. According to the technique disclosed in Patent Document 1, a seat in a vehicle is imaged by an infrared camera, and a seat belt wearing state is detected based on a surface temperature distribution of the upper body of an occupant in the captured thermal image.

JP 2004-161087 A

  Incidentally, in recent years, in a hatchback type vehicle, a rear seat (rear seat) in which a seat back (backrest) can be tilted forward is often used. By tilting the seat back forward, the convenience of loading long luggage is improved. In some sedan type vehicles, a rear seat can be tilted forward to allow communication between the rear trunk and the passenger compartment.

  When the seat back of the rear seat is raised so that the occupant can sit, the seat back is fixed to the structure of the vehicle body by a locking means such as a latch. However, there are cases where the seat back is not completely fixed, such as in a half-latch state. In such a case, the seat back may fall forward when the vehicle collides.

  When the retractor that winds up the seat belt of the rear seat is built in the seat bag, when the seat back falls forward, the retractor also falls forward together with the seat back. As a result, even if the occupant is wearing the seat belt, it becomes difficult to restrain the occupant with the seat belt if the seat bag falls down. For this reason, it becomes difficult to protect an occupant with a seat belt at the time of a vehicle collision or the like.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle seat belt control device capable of improving the safety of an occupant seated on a rear seat whose seat bag is tilted forward.

  In order to achieve the above object, a vehicle seat belt control apparatus according to the present invention includes a rear seat having a seat back that can be tilted forward, locking means for fixing the seat back in an upright state, and fixing of the seat back by the locking means. Lock detecting means for detecting presence / absence, seat belt wearing detecting means for detecting presence / absence of wearing of a seat belt wound by a retractor provided on a seat back, and detection of whether the locking means is in an unfixed state by the lock detecting means And warning means for issuing a warning to the driver when the seat belt wearing detection means detects that the seat belt is in a worn state.

  According to the vehicle seatbelt control device of the present invention configured as described above, even when the seatbelt of the occupant seated on the rear seat is in a worn state, the locking means for fixing the seatback is in an unfixed state. Will be alerted. Therefore, according to the vehicle seat belt control apparatus of the present invention, it is possible to improve the safety of an occupant seated on the rear seat.

Preferably, in the present invention, the alarm means also serves as a seat belt non-wearing alarm means that issues an alarm when the seat belt wearing detection means detects that the seat belt is not worn.
Thus, if the seat belt non-wear alarm means is also used, the increase in the number of parts of the vehicle can be suppressed, and the cost can be reduced as compared with the case where the alarm means is provided separately from the seat belt non-wear alarm means. .

In the present invention, it is preferable that the alarm unit is a display unit that is provided at a position where a passenger can visually recognize in the passenger compartment and lights up when the seat belt is not worn.
By providing such a display means, the driver can easily notice that the locking means is in an unfixed state even when the seat belt is worn.

In the present invention, it is preferable that the display means display contents when the lock means is in the non-fixed state and display contents when the seat belt is not worn.
Thereby, when the seat belt is simply not worn, even when the seat belt is in a worn state, it can be distinguished from the case where the locking means is in an unfixed state.

  As described above, according to the vehicle seatbelt control device of the present invention, it is possible to improve the safety of the occupant seated on the rear seat where the seat bag is tilted forward.

Embodiments of a seat belt control device for a vehicle according to the present invention will be described below with reference to the accompanying drawings.
First, FIG. 1 schematically shows an arrangement of seats in a vehicle compartment of a vehicle provided with a rear seat having a seat back that can be tilted forward, which is a premise of the present invention. In FIG. 1, the vehicle interior is shown with the front of the vehicle facing upward.

  As shown in FIG. 1, a left front seat 2 </ b> L and a right front seat 2 </ b> R are provided in the front portion of the passenger compartment 1, and a three-seat rear seat 4 is provided in the rear portion. The seat back of the rear seat 4 is divided into 6: 4 into a left seat back 40L and a right seat back 40R. The left and right seat backs 40L and 40R can be tilted forward independently of each other. Further, the left and right seat backs 40L and 40R are fixed to the vehicle body structure separately by the left and right locking means 5L and 5R, respectively, in the raised state. The locking means 5L and 5R are constituted by, for example, a latch mechanism.

  The left and right seat backs 40L and 40R have retractors that wind up the seat belts. A left retractor 6L is built in the left seat back 40L. The right seat back 40R incorporates a right retractor 6R and a central retractor 6C.

  Furthermore, with reference to FIG. 2, the structure of the vehicle seatbelt control apparatus of 1st Embodiment is demonstrated. FIG. 2 shows a state in which the left seat back 40L of the rear seat 4 is tilted forward and the right seat back 40R is erected. The left seat back 40L is shown with the headrest removed for convenience.

  The seat belts 3L, 3C and 3R pulled out from the retractors 6L, 6C and 6R respectively extend from the upper part of the seat backs 40L and 40R to the front surfaces of the seat backs 40L and 40R. The front ends of the seat belts 3L, 3C, and 3R are inserted between the rear end of the seating surface 41 of the rear seat 4 and the lower ends of the seat backs 40L and 40R, and are fixed to anchors (not shown). Further, a tongue member 31 is attached to each of the seat belts 3L, 3C and 3R, and the tongue member 31 is detachably attached to a buckle member 32 extending from the rear end of the seating surface of the rear seat 4.

  Further, as shown in FIG. 2, the vehicle seat belt control device of the present embodiment includes a left lock detecting means 7L for detecting whether the left seat back 40L is fixed by the left lock means 5L, and a right side by the right lock means 5R. Right-side lock detecting means 7R for detecting whether or not the seat back 40R is fixed. The configuration of these lock detection means 7L and 7R is not particularly limited as long as it can detect whether the lock means 5L and 5R are fixed. For example, the locking means 5L and 5R may be provided with electrical contacts, and the presence or absence of fixing may be detected based on the presence or absence of contact conduction.

  Further, the vehicle seatbelt control device of the present embodiment includes a left seatbelt wear detecting means 8L that detects whether or not the seatbelt 3L is wound around the left retractor 6L provided on the left seatback 40L, and a left seatback. The central seat belt wearing detection means 8C for detecting whether or not the seat belt 3C is wound by the central retractor 6C provided at 40L and the wearing of the seat belt 3R wound by the right retractor 6R provided at the right seat back 40R. Right-side seat belt wearing detection means 8R for detecting presence or absence.

  The method for detecting whether or not the seat belt is worn by the seat belt wearing detection means 8L, 8C and 8R is not particularly limited. For example, when the seat belt is pulled out from each retractor by a predetermined length or more, the wearing of the seat belt may be detected, or the engagement state between the tongue member and the buckle member may be detected. .

  Further, in the vehicle seat belt control apparatus of the present embodiment, the lock detecting means 7L and 7R detect that the lock means 5L and 5R are in the non-fixed state, and the seat belt wearing detection means 8L, 8C and 8R. When it is detected that the seat belt is worn, an alarm means 9 for issuing an alarm is provided. In the present embodiment, the alarm means 9 is a seat belt non-wear alarm means that issues an alarm when the seat belt wearing detection means 8L, 8C and 8R detect that the seat belts 3L, 3C and 3R are in a non-wearing state. Doubles as The alarm means 9 may be composed of a display means for displaying the detection content of each detection means and a computer for causing the display means to display according to the detection content of each detection means.

  Here, FIG. 3 shows a display example by the display means 90 constituting the alarm means 9. The display means 90 shown in FIG. 3 is provided on the instrument panel in front of the driver's seat and lights up when the seat belt is not worn. The display means 90 is provided with lamps 91 to 95 corresponding to the respective seats of the vehicle.

  The display unit 90 displays the non-wearing state of the seat belt when the locking unit 5L or 5R is in the non-fixed state regardless of the wearing state of the seat belt. For example, in FIG. 3, when the right front seat 2R and the right seat belt 3R of the rear seat 4 are not worn, the right front seat lamp 91 and the right rear seat lamp 93 are lit for convenience. Shown with hatching. Further, when the locking means 5L of the left seat back 40L of the rear seat 4 is not completely fixed, the lamp 94 of the center seat belt and the lamp 95 of the left seat belt of the rear seat 4 are hatched for convenience. Is shown.

  Thus, by displaying on the display means 90, even if the driver is wearing the seat belt, if the seat back is not fixed, the driver is displayed that the seat belt is not worn. It can be grasped that the seat back is not fixed.

  Next, an example of the operation of the vehicle seat belt control apparatus according to the embodiment of the present invention will be described with reference to the flowchart of FIG. In the flowchart of FIG. 4, the presence / absence of fixing of each seat back of the rear seat and the presence / absence of wearing of each seat belt of the rear seat are sequentially detected.

  First, the warning means 9 determines whether or not the left lock detecting means 7L detects that the left seat back 40L is fixed by fitting the left lock means 5L (step S1). When the left lock means 5L is in a non-fixed state (in the case of “No” in step S1), as shown in FIG. 3, the display means 90 includes a left rear seat belt 3L and a rear seat center seat belt 3C. Is displayed in a non-wearing state (step S2).

  On the other hand, if the left lock means 5L is in a fixed state (in the case of “Yes” in step S1), then it is determined whether or not the left rear seat belt 3L is used and is in a worn state (step S3). When the left rear seat belt 3L is in a worn state (“Yes” in step S1), the display device 90 displays that the left rear seat belt 3L is in a worn state (step S4).

  On the other hand, when the seat belt 3L of the left rear seat is in the non-wearing state (in the case of “No” in Step S1), the display device 90 displays that the seat belt 3L of the left rear seat is not in the wearing state (Step S5). ).

  Subsequently, it is determined whether or not the left rear center seat belt 3C is used and is in a worn state (step S6). When the rear center seat belt 3C is in the worn state (in the case of “Yes” in step S6), the display device 90 displays that the rear center seat belt 3C is in the worn state (step S7).

  On the other hand, when the rear center seat belt 3C is not worn (in the case of “No” in step S6), the display device 90 displays that the rear center seat belt 3C is not worn (step S8).

  Next, it is determined whether or not the right lock detecting means 7R detects that the right seat back 40R is fixed by the engagement of the right lock means 5R (step S9). When the right lock means 5R is in the non-fixed state (“No” in step S9), the display means 90 displays that the right rear seat belt 3R is not being used (step S10).

  On the other hand, if the right lock means 5R is in a fixed state (“Yes” in step S9), then it is determined whether or not the right rear seat belt 3R is used and is in a worn state (step S11). If the right rear seat belt 3R is in a worn state ("Yes" in step S11), the display device 90 displays that the right rear seat belt 3R is in a worn state (step S12).

  On the other hand, when the right rear seat belt 3R is not worn (in the case of “No” in step S11), the display device 90 also displays on the display device 90 that the right rear seat belt 3R is not worn. Is performed (step S10).

  Thereby, even if the seat belt is worn, if the seat back is not fixed by the locking means, the indication that the seatbalt is not worn is displayed. For this reason, the driver can notice that the seat back is not fixed.

Next, a second embodiment of the present invention will be described.
The configuration of the vehicle seat belt control means of the second embodiment is basically the same as that of the first embodiment described above. However, in the second embodiment, the display means is different from the display contents when the locking means is in the non-fixed state and the display contents when the seat belt is in the non-wearing state.

  Here, FIG. 5 shows a display example by the display means 90 constituting the alarm means 9. The display means 90 shown in FIG. 5 is also provided on the instrument panel in front of the driver's seat and lights up when the seat belt is not worn. The display means 90 is provided with lamps 91 to 95 corresponding to the respective seats of the vehicle.

  The display means 90 is different from the display contents when the lock means 5L or 5R is in the non-fixed state and the display contents when the seat belt 3L, 3C or 3R is not in the worn state. The display content is preferably different depending on, for example, the difference in display color and the difference between continuous lighting and blinking of the lamp.

  In the example shown in FIG. 5, when the right front seat 2R and the right seat belt 3R of the rear seat 4 are not worn, the right front seat lamp 91 and the right rear seat lamp 93 are lit for convenience. Is shown with hatching. Further, when the locking means 5L of the left seat back 40L of the rear seat 4 is not completely fixed, the center seat belt ramp 94 and the left seat belt ramp 95 of the rear seat 4 are simply not wearing the seat belt. Indicates that they are lit differently for the sake of convenience.

  Thus, by displaying on the display means 90, the driver can easily grasp which occupant is not wearing the seat belt and which seat back is not fixed. .

  Next, an operation example of the vehicle seat belt control device according to the second embodiment of the present invention will be described with reference to the flowchart of FIG. In the flowchart of FIG. 6, the presence or absence of fixing of each seat back of the rear seat and the presence or absence of wearing of each seat belt of the rear seat are sequentially detected.

  First, the warning means 9 determines whether or not the left lock detecting means 7L detects that the left seat back 40L is fixed by fitting the left lock means 5L (step S1). When the left lock means 5L is in the non-fixed state (in the case of “No” in Step S1), in the second embodiment, as shown in FIG. 5, the left seat back 40L is not fixed in the display means 90. A certain display is performed (step S2).

  On the other hand, if the left lock means 5L is in a fixed state (in the case of “Yes” in step S1), then it is determined whether or not the left rear seat belt 3L is used and is in a worn state (step S3). When the left rear seat belt 3L is in a worn state (“Yes” in step S1), the display device 90 displays that the left rear seat belt 3L is in a worn state (step S4).

  On the other hand, when the seat belt 3L of the left rear seat is in the non-wearing state (in the case of “No” in Step S1), the display device 90 displays that the seat belt 3L of the left rear seat is not in the wearing state (Step S5 ).

  Subsequently, it is determined whether or not the left rear center seat belt 3C is used and is in a worn state (step S6). When the rear center seat belt 3C is in the worn state (in the case of “Yes” in step S6), the display device 90 displays that the rear center seat belt 3C is in the worn state (step S7).

  On the other hand, when the rear center seat belt 3C is not worn (in the case of “No” in step S6), the display device 90 displays that the rear center seat belt 3C is not worn (step S8).

  Next, it is determined whether or not the right lock detecting means 7R detects that the right seat back 40R is fixed by the engagement of the right lock means 5R (step S9). When the right lock means 5R is in the non-fixed state (“No” in step S9), in the second embodiment, the display means 90 displays that the right seat back 40R is in the non-fixed state (step S10). .

  On the other hand, if the right lock means 5R is in a fixed state (“Yes” in step S9), then it is determined whether or not the right rear seat belt 3R is used and is in a worn state (step S11). If the right rear seat belt 3R is in a worn state ("Yes" in step S11), the display device 90 displays that the right rear seat belt 3R is in a worn state (step S12).

  On the other hand, when the right rear seat belt 3R is not worn (in the case of “No” in step S11), in this case, the display device 90 displays a display indicating that the right rear seat belt 3R is not worn. It performs (step S13).

  In this way, for each seat belt, a warning is given with different indications of the non-fixed state of the seat belt and the non-fixed state of the seat back, so that the driver can determine which occupant is not wearing the seat belt, It is possible to easily grasp which seat back is not fixed.

  In each embodiment mentioned above, although the example which constituted the present invention on specific conditions was explained, the present invention can perform various change and combination, and is not limited to this. For example, in the above-described embodiment, an example in which an alarm is issued when the locking means is not fixed regardless of whether or not the seat belt is worn has been described. However, in the present invention, the seat belt is worn. Only when the lock means is fixed, it may be detected whether the lock means is fixed.

  Further, in the above-described embodiment, an example of alarming whether the locking unit is fixed or not is described by displaying an indicator. However, when the locking unit is not fixed, an alarm may be issued by a buzzer or sound. Further, in the above-described embodiment, the alarm unit when the lock unit is not fixed has been described as an example of serving as the seat belt non-wear alarm unit. However, in the present invention, the alarm unit and the seat belt non-wear alarm are described. The means may be provided separately. Further, the display means is provided on the instrument panel, but may be provided on the overhead console in the upper part of the driver's seat.

It is a schematic diagram which shows arrangement | positioning of the sheet | seat in a vehicle interior. 1 is a configuration diagram of a vehicle seat belt control device according to an embodiment of the present invention. FIG. It is an example of a display of the alarm means of the seatbelt control apparatus of the vehicle of 1st Embodiment of this invention. It is a flowchart explaining the operation example of the seatbelt control apparatus of the vehicle of 1st Embodiment of this invention. It is an example of a display of the alarm means of the seatbelt control apparatus of the vehicle of 2nd Embodiment of this invention. It is a flowchart explaining the operation example of the seatbelt control apparatus of the vehicle of 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car compartment 2L, 2R Front seat 3L, 3C, 3R Seat belt 4 Rear seat 5L, 5R Lock means 6L, 6C, 6R Retractor 7L, 7R Lock detection means 8L, 8R Seat belt wearing detection means 9 Alarm means 31 Tongue member 32 Buckle 40L, 40R Seat back 41 Seat

Claims (4)

A rear seat having a seat back that can be tilted forward;
Lock means for fixing the seat back in an upright state;
Lock detecting means for detecting whether or not the seat back is fixed by the locking means;
Seat belt wearing detection means for detecting the presence or absence of wearing of a seat belt wound up by a retractor provided on the seat back;
Alarm means for issuing an alarm when the lock detection means detects that the lock means is in an unfixed state and the seat belt wear detection means detects that the seat belt is in a worn state; and
A vehicle seat belt control device comprising: 2. The seat according to claim 1, wherein the alarm unit also serves as a seat belt non-wearing alarm unit that issues an alarm when the seat belt wearing detection unit detects that the seat belt is in a non-wearing state. Belt control device. 3. The seat belt control device according to claim 1, wherein the warning means is configured by display means that is provided at a position where a passenger can visually recognize in the passenger compartment and lights up when the seat belt is not worn. 4. The display unit according to claim 1, wherein a display content when the lock unit is in a non-fixed state and a display content when the seat belt is in a non-wearing state are different from each other. The seat belt control device according to item.

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