JP6187399B2 - Vehicle seat belt warning device - Google Patents

Description

  The present invention relates to a vehicle seat belt warning device that issues a warning when a vehicle occupant is not wearing a seat belt.

Needless to say, the seat belt device that holds the occupant plays an important role in preventing the occupant seated in the vehicle seat from colliding with the interior member in the passenger compartment or being thrown out of the vehicle during a vehicle collision. Yes. In order for the seat belt device to fully function, it is important that the vehicle occupant always wears the seat belt.
There has been a related art relating to a vehicle seat belt warning device that issues a warning when an occupant seated in a vehicle seat fails to wear a seat belt and prompts the occupant to wear the seat belt (see, for example, Patent Document 1). ). This vehicle seat belt warning device according to the prior art is provided with a seating detection switch in a seat cushion of a vehicle seat, and a mounting detection switch for detecting whether or not the seat belt is mounted is formed on a buckle connected to the seat belt. ing. In this configuration, when the occupant seated on the vehicle seat does not wear the seat belt, electric power is supplied and the vibration motor built in the buckle operates. As a result, the buckle vibrates to urge the passenger to wear the seat belt. So far, many types of vehicle seat belt warning devices of this type have been considered and proposed.

JP 2007-83942 A

However, in the vehicle seat belt warning device according to the related art described above, it is not always possible to issue a warning to an occupant not wearing a seat belt. That is, in a vehicle having a large cabin such as a one-box car, it is assumed that an occupant does not sit on the vehicle seat and lies on the floor in the cabin. In such a case, the seating detection switch provided on the vehicle seat cannot detect a lying passenger and cannot issue a warning to the passenger. Such a problem often occurs in a rear seat space of a vehicle such as a one-box car or a wagon car that has a high degree of freedom of movement of passengers in the passenger compartment. When such a vehicle collides, an occupant who is not seated on the vehicle seat is likely to be seriously damaged due to a large body thrown out by the impact.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle seat belt warning device that accurately detects a seat belt non-mounted state by a vehicle occupant and issues a warning.

In order to solve the above-mentioned problem, the invention of the vehicle seat belt warning device (1 , 1A, 1B ) according to claim 1 is a vehicle warning means for issuing a warning to the occupant in the passenger compartment (10a). 7, 9, 12) and space occupant detection means for detecting occupants in the rear seat space (10j) regardless of whether they are seated in the rear seats (10d, 10e) of the vehicle (10). 2, 2A, 11, 13) and the seat belt (10i) provided on the rear seat, based on the detection result by the seat belt detecting means (3) for detecting the presence or absence of the seat and the space occupant detecting means, Passenger number detecting means (6b) for detecting the number of occupants in the rear seat space, and belt wearing number detecting means (6c) for calculating the number of seat belts in the mounted state based on the detection result by the seat belt detecting means. ) And square When the number of occupants in the rear seat space detected by the number detection means is greater than the number of seat belts in the wearing state detected by the belt wearing number detection means, the vehicle warning means is activated to Warning control means (6e) for warning the passenger number detection means, and the number of passengers entering the rear seat space and exiting from the rear seat space based on the detection result by the space passenger detection means. The number of passengers is acquired, and the result of subtracting the number of passengers exiting from the rear seat space from the number of passengers entering the rear seat space is defined as the number of passengers in the rear seat space.

According to this configuration, when the number of occupants in the rear seat space detected by the occupant number detecting means is larger than the number of seat belts in the mounted state detected by the belt wearing number detecting means, the vehicle warning means Is equipped with a warning control means for warning the passenger, so that it is possible to accurately detect the presence or absence of a passenger who is in the rear seat space and is not wearing a seat belt, A warning can be given to an occupant lying in the rear seat space without sitting on the rear seat. Therefore, it is possible to prompt the occupant to wear the seat belt, and to reduce damage to the occupant when the vehicle collides. Further, the occupant number detection means can easily detect the number of occupants in the rear seat space.
In the present invention, the rear seat means a vehicle seat other than the front seat such as a driver seat or a passenger seat of the vehicle, and the rear seat space is seated on the rear seat. It means a space where there is an occupant or an occupant who can be seated on the rear seat.

The block diagram which showed the structure of the vehicle seatbelt warning device by Embodiment 1 of this invention. The top view showing the vehicle interior of the vehicle provided with the vehicle seat belt warning device shown in FIG. Partial enlarged view of FIG. Schematic diagram showing a photoelectric sensor unit of a different type from the photoelectric sensor unit shown in FIG. Furthermore, a schematic diagram showing different types of photoelectric sensor units The figure showing the whole flowchart of seatbelt warning control by Embodiment 1. The figure showing the flowchart of passenger number P detection control shown in FIG. The block diagram which showed the structure of the seatbelt warning device for vehicles by Embodiment 2. FIG. The top view showing the vehicle interior of the vehicle provided with the vehicle seat belt warning device shown in FIG. The schematic diagram for demonstrating the modification of the detection method of the passenger | crew by the surface pressure sensor member shown in FIG. The block diagram which showed the structure of the vehicle seatbelt warning device by Embodiment 3. FIG. The top view showing the vehicle interior of the vehicle provided with the vehicle seat belt warning device shown in FIG. The top view showing the vehicle interior of the vehicle in which the vehicle seatbelt warning device by Embodiment 4 was provided

<Embodiment 1>
The vehicle seat belt warning device 1 according to the first embodiment will be described with reference to FIGS. 1 to 6. First, the vehicle 10 provided with the vehicle seat belt warning device 1 will be described with reference to FIG. As shown in FIG. 2, the vehicle 10 is a vehicle called a one-box car. However, the vehicle to which the vehicle seat belt warning device 1 according to the present invention is applicable is not necessarily limited to a one-box car, and can be applied to other vehicles.
The vehicle 10 has a passenger compartment 10a, and a driver seat 10b and a passenger seat 10c are attached to the front portion of the passenger compartment 10a. A second row seat 10d and a third row seat 10e are attached to a rear seat space 10j which is a part of the passenger compartment 10a. Here, the rear seat space 10j is a space where an occupant seated on the second row seat 10d or the third row seat 10e or an occupant seatable on the second row seat 10d or the third row seat 10e exists. I mean. The second row seat 10d and the third row seat 10e correspond to rear seats, respectively.

  An entrance 10g (corresponding to an entrance for a rear seat) for the second row seat 10d and the third row seat 10e is formed on the left side surface of the body 10f forming the passenger compartment 10a. The entrance 10g is for the passenger to enter the second row seat 10d or the third row seat 10e, or for the passenger to leave the second row seat 10d or the third row seat 10e. A rear door 10h is slidably attached to the body 10f so that the entrance 10g can be opened and closed. Further, seat belt devices 10i (corresponding to seat belts) are attached to the second row seat 10d and the third row seat 10e, respectively, by the number of occupants that can be seated. The seat belt device 10i is also provided in the driver's seat 10b and the passenger seat 10c, but the components other than those provided in the third row seat 10e are omitted in FIG.

  The vehicle seat belt warning device 1 according to the present embodiment is provided inside the passenger compartment 10a of the entrance / exit 10g, and can detect that an occupant passes through the entrance / exit 10g. Corresponding to a photoelectric sensor device). As shown in FIG. 2, the photoelectric sensor unit 2 includes a first light emitting sensor 2a and a first light receiving sensor 2b, and a vehicle interior of the vehicle interior 10a (a vehicle interior) by a predetermined distance from the first light emitting sensor 2a and the first light receiving sensor 2b, respectively. The second light-emitting sensor 2c and the second light-receiving sensor 2d are arranged on the inner side). The second light emitting sensor 2c and the second light receiving sensor 2d correspond to one photoelectric sensor device, and the first light emitting sensor 2a and the first light receiving sensor 2b correspond to the other photoelectric sensor device.

As shown in FIG. 3, visible light or infrared light transmitted from the first light emitting sensor 2a is received by the first light receiving sensor 2b. The first light-emitting sensor 2a and the first light-receiving sensor 2b are transmissive photoelectric sensor devices. When a passenger passes between the first light-emitting sensor 2a and the first light-receiving sensor 2b, light reception by the first light-receiving sensor 2b is prevented and the passenger passes through the entrance 10g. Can be detected.
Visible light or infrared light transmitted from the second light emitting sensor 2c is received by the second light receiving sensor 2d. The second light-emitting sensor 2c and the second light-receiving sensor 2d are also transmissive photoelectric sensor devices. When the occupant passes between the two light-emitting sensors 2c and 2d, light reception by the second light-receiving sensor 2d is hindered and the occupant passes through the entrance 10g Can be detected.

As described above, the second light emitting sensor 2c and the second light receiving sensor 2d are disposed inside the vehicle compartment 10a by a predetermined distance from the first light emitting sensor 2a and the first light receiving sensor 2b, respectively. Accordingly, the passenger number calculation unit 6b of the controller 6 described later detects that the occupant has passed through the entrance 10g by the second light receiving sensor 2d after detecting that the occupant has passed through the entrance 10g by the first light receiving sensor 2b. If detected, it is determined that the passenger has entered the rear seat space 10j.
When the number of passengers calculating unit 6b detects that the occupant has passed the entrance 10g by the second light receiving sensor 2d, and detects that the occupant has passed the entrance 10g by the first light receiving sensor 2b, Is determined to have left the rear seat space 10j.
In this manner, the photoelectric sensor unit 2 can detect a passenger in the rear seat space 10j regardless of whether or not it is seated on the second row seat 10d and the third row seat 10e.

  The photoelectric sensor unit 2 can be of a type different from that shown in FIG. For example, as shown in FIG. 4A, a diffuse reflection type photoelectric sensor device in which a first light emitting sensor 2a, a first light receiving sensor 2b, a second light emitting sensor 2c, and a second light receiving sensor 2d are arranged in a horizontal row may be formed. Good. In the photoelectric sensor device, when there is no object that reflects light emitted from the first light emitting sensor 2a and the second light emitting sensor 2c, light is not received by the first light receiving sensor 2b and the second light receiving sensor 2d. However, when there is an obstacle OB that reflects light emitted from the first light emitting sensor 2a and the second light emitting sensor 2c, the reflected light reflected by the obstacle OB is received by the first light receiving sensor 2b or the second light receiving sensor 2d. Thus, the presence of the obstacle OB can be detected.

  Further, as shown in FIG. 4B, the first light emitting sensor 2a, the first light receiving sensor 2b, the second light emitting sensor 2c, and the second light receiving sensor 2d are arranged in a horizontal row, and the reflecting mirror RP is disposed so as to face all of them. A regressive reflection type photoelectric sensor device may be formed. In the photoelectric sensor device, when there is no object that blocks light emitted from the first light emitting sensor 2a and the second light emitting sensor 2c, each light emitted is reflected by the reflecting mirror RP, and then the first light receiving sensor 2b or the second light receiving light. Light is received by the sensor 2d. However, when there is an obstacle OB that blocks light emitted from the first light emitting sensor 2a or the second light emitting sensor 2c, the light is not received by the first light receiving sensor 2b and the second light receiving sensor 2d, and the presence of the obstacle OB is not detected. Can be detected.

As shown in FIG. 1, the vehicle seat belt warning device 1 includes a buckle switch 3 (corresponding to a seat belt detection means) attached to the above-described seat belt device 10i. The buckle switch 3 is provided in the buckle of each seat belt device 10i, and is configured to be able to detect whether or not each seat belt device 10i is mounted.
The vehicle seat belt warning device 1 includes a vehicle speed sensor 4. The vehicle speed sensor 4 is formed so that the speed of the vehicle 10 can be detected from the rotational speed of the output shaft of a transmission (not shown) of the vehicle 10. The vehicle speed sensor 4 may be a sensor that detects the wheel speed of the vehicle 10.
The vehicle seat belt warning device 1 includes a door courtesy switch 5. As shown in FIG. 2, the door courtesy switch 5 is attached near the entrance 10g of the vehicle 10 and detects the open / closed state of the rear door 10h.

The photoelectric sensor unit 2, the buckle switch 3, the vehicle speed sensor 4, and the door courtesy switch 5 described above are connected to the controller 6.
An instrument panel 7 (corresponding to vehicle warning means) formed on a dashboard (not shown) of the vehicle 10 is connected to the controller 6. On the instrument panel 7, the speed of the vehicle 10 and various warning messages are displayed. In addition, the instrument panel 7 detects that the seat belt device 10i is not attached as will be described later, in response to a warning display signal from the controller 6, the seat belt in the passenger compartment 10a (corresponding to the passenger compartment). Display a mounting warning.
In addition, a speaker device 9 (corresponding to vehicle warning means) provided in the passenger compartment 10a is connected to the controller 6 via an audio ECU 8. The speaker device 9 is controlled by the audio ECU 8 to generate sound such as music in the passenger compartment 10a. Further, when it is detected that the seat belt device 10 i is not worn, the audio ECU 8 generates a seat belt non-wearing warning message from the speaker device 9 in the passenger compartment 10 a by a warning sound signal from the controller 6.

The controller 6 is a control device formed by an input / output device (not shown), a CPU, a RAM, and the like. The controller 6 may be used also as, for example, an airbag ECU. The controller 6 includes a photoelectric sensor detection unit 6a, an occupant number calculation unit 6b, a buckle switch detection unit 6c, a belt unmounted number calculation unit 6d, and a warning control unit 6e.
The photoelectric sensor detection unit 6a detects the light reception timing by the first light reception sensor 2b and the second light reception sensor 2d of the photoelectric sensor unit 2.
The occupant number calculation unit 6b (corresponding to the occupant number detection means) detects the number of occupants (ΣDin) detected as having entered the rear seat space 10j based on the light reception timing detected by the photoelectric sensor detection unit 6a. ) And the number of passengers (ΣDout) detected as having exited from the rear seat space 10j. The occupant number calculation unit 6b subtracts the occupant number (ΣDout) exiting from the rear seat space 10j from the number of occupants (ΣDin) entering the rear seat space 10j, and the result is stored in the rear seat space 10j (rear) The number of passengers in the seat space is P.
Further, the buckle switch detection unit 6c (corresponding to the belt wearing number detection means) is based on the detection result by the buckle switch 3 and the seat belt device 10i provided in the second row seat 10d and the third row seat 10e. The number S of seat belt devices 10i in the mounted state is detected.
Further, the belt non-mounting number calculation unit 6d is the seat belt device 10i in the mounted state detected by the buckle switch detection unit 6c from the number P of passengers in the rear seat space 10j detected by the passenger number calculation unit 6b. The number S is subtracted.
Further, the warning control unit 6e (corresponding to the warning control means) is in the rear seat space 10j detected by the belt non-mounting number calculation unit 6d when the calculation result exceeds 0, that is, detected by the occupant number calculation unit 6b. When the number P of passengers in the vehicle is larger than the number S of seat belt devices 10i in the mounted state detected by the buckle switch detection unit 6c, the instrument panel 7 and the speaker device 9 are operated to act on the passengers. Make a warning.

Hereinafter, based on FIG. 5, the method of the seatbelt warning control by the controller 6 of this embodiment is demonstrated. First, the occupant number calculation unit 6b performs the occupant number P detection control, and detects the occupant number P in the rear seat space 10j based on the detection result by the photoelectric sensor unit 2 (step S101). Next, the controller 6 determines whether or not the speed of the vehicle 10 detected by the vehicle speed sensor 4 is equal to or higher than a predetermined speed Vw (step S102). When the speed of the vehicle 10 is less than Vw, it waits for the speed of the vehicle 10 to increase. When the speed of the vehicle 10 is equal to or higher than Vw, the buckle switch detection unit 6c is based on the detection result by the buckle switch 3 and the seat belt device 10i provided in the second row seat 10d and the third row seat 10e Then, the number S of seat belt devices 10i in the mounted state is detected (step S103).
Next, the seat belt device in which the belt unmounted number calculating unit 6d is in the mounted state detected by the buckle switch detecting unit 6c from the number of passengers P in the rear seat space 10j detected by the occupant number calculating unit 6b. The number S of 10i is subtracted. The warning control unit 6e determines whether or not the subtraction result (PS) by the belt non-mounting number calculation unit 6d exceeds 0 (step S104). When the subtraction result exceeds 0, the warning control unit 6e detects that the seat belt device 10i is not worn, and operates the instrument panel 7 and the speaker device 9 to issue a warning to the occupant (step) S105). If the result of subtracting the number S of seat belt devices 10i in the mounted state from the number P of passengers in the rear seat space 10j does not exceed 0, this control ends without warning the passenger.

Next, based on FIG. 6, a method of the above-described occupant number P detection control (step S101) will be described. First, it is determined whether or not the rear door 10h of the vehicle 10 is open (step S201). When the rear door 10h is in the closed state, the process proceeds to step S204. When the rear door 10h is in the open state, as described above, the occupant number calculation unit 6b is based on the detection result by the photoelectric sensor unit 2 from the occupant number (ΣDin) that has entered the rear seat space 10j. The number of passengers (ΣDout) leaving the rear seat space 10j is subtracted, and the result is set as the number of passengers P in the rear seat space 10j (step S202).
Thereafter, it is determined whether or not the rear door 10h is in a closed state (step S203). When the rear door 10h is in the open state, the process returns to step S202, and the calculation of the number of passengers P in the rear seat space 10j is continued. When the rear door 10h is in the closed state, it is determined whether or not the vehicle 10 has started running (step S204). If the vehicle 10 has not started running, the process returns to step S201. When the vehicle 10 starts running, this control ends. In the control flow described above, when the rear door 10h is closed in step S203, the calculation of the number of occupants P is completed, but when the vehicle 10 starts traveling, the calculation of the number of occupants P is completed. May be terminated.

According to the present embodiment, the number S of seat belt devices 10i in the mounted state detected by the buckle switch detection unit 6c is calculated from the number P of passengers in the rear seat space 10j detected by the passenger number calculation unit 6b. When the calculation result (PS) of the belt non-wearing number calculating unit 6d to be subtracted and the belt non-wearing number calculating unit 6d exceeds 0, the instrument panel 7 and the speaker device 9 are operated to make the occupant And a warning control unit 6e that warns the user. Accordingly, it is possible to accurately detect the presence or absence of an occupant who is in the rear seat space 10j and is not wearing the seat belt device 10i, and is not seated on the second row seat 10d or the third row seat 10e. In addition, a warning can be given to an occupant lying in the rear seat space 10j. Therefore, the occupant can be encouraged to install the seat belt device 10i, and damage to the occupant during the collision of the vehicle 10 can be reduced.
In addition, the occupant number calculation unit 6b obtains the number of occupants (ΣDout) leaving the rear seat space 10j from the number of occupants entering the rear seat space 10j (ΣDin) acquired based on the detection result by the photoelectric sensor unit 2. The result of the subtraction is the number of passengers P in the rear seat space 10j. As a result, the occupant number calculation unit 6b can easily detect the occupant number P in the rear seat space 10j regardless of whether or not the second row seat 10d and the third row seat 10e are seated. .
Further, the second light emitting sensor 2c and the second light receiving sensor 2d are disposed inside the vehicle compartment 10a by a predetermined distance from the first light emitting sensor 2a and the first light receiving sensor 2b, respectively. When the number of passengers calculation unit 6b detects that the occupant has passed through the entrance 10g by the first light receiving sensor 2b, and detects that the occupant has passed through the entrance 10g by the second light receiving sensor 2d, Is determined to have entered the rear seat space 10j. When the number of passengers calculating unit 6b detects that the occupant has passed the entrance 10g by the second light receiving sensor 2d, and detects that the occupant has passed the entrance 10g by the first light receiving sensor 2b, Is determined to have left the rear seat space 10j. Thereby, the passenger | crew number calculating part 6b can detect easily the passenger | crew who entered the space 10j for rear seats, and the passenger | crew who left the space 10j for rear seats based on the detection value by the photoelectric sensor unit 2. FIG.
Further, according to the present embodiment, the number of passengers entering the rear seat space 10j (ΣDin) acquired based on the detection result by the photoelectric sensor unit 2 is changed from the number of passengers entering the rear seat space 10j (ΣDout). The result of the subtraction is the number of passengers P in the rear seat space 10j. Thereby, in order to detect the number of passengers P in the rear seat space 10j, the second row seat 10d and the third row seat 10e do not require seating sensors for the number of seated persons. Therefore, even if the second row sheet 10d or the third row sheet 10e is a sheet that can be arranged, such as a split slide type, handling of sensor wiring and the like does not become complicated.
Further, according to the present embodiment, since the warning is given to the occupant based on the number P of passengers in the rear seat space 10j and the number S of seat belt devices 10i in the mounted state, the vehicle door is closed. Unlike the type that memorizes the seat belt device's wearing state at the time when the seat is worn and warns when switching from the wearing state to the non-wearing state, it also warns passengers who are not wearing the seat belt device from the beginning. It can be performed.

<Embodiment 2>
Hereinafter, a difference between the vehicle seat belt warning device 1A according to the second embodiment and the vehicle seat belt warning device 1 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 7, the vehicle seat belt warning device 1 </ b> A according to the present embodiment includes a surface pressure sensor member 11 instead of the photoelectric sensor unit 2. The surface pressure sensor member 11 is a pressure sensor using a pressure sensitive film. As a substitute for the surface pressure sensor member 11, a membrane switch or a capacitance sensor may be used.
As shown in FIG. 8, the surface pressure sensor member 11 is provided on the floor 10k (corresponding to the floor) of the passenger compartment 10a, and is provided between the entrance 10g and the second row seat 10d and the third row seat 10e. Has been placed. The surface pressure sensor member 11 is formed by a plurality of sensor elements 11a (corresponding to space occupant detection means and contact sensors) that have different distances from the entrance 10g. Each sensor element 11a is formed to be able to detect the contact of the foot portion FT of the occupant by the surface pressure generated by the occupant walking on the floor 10k and being pinched with the floor 10k. ing.
Thereby, the surface pressure sensor member 11 can detect the passenger | crew who exists in the space 10j for rear seats, irrespective of whether it seats on the 2nd row | line seat 10d and the 3rd row | line seat 10e. When a capacitance sensor is used instead of the surface pressure sensor member 11, an electrode is disposed at a position where the sensor element 11a is provided.

The controller 6A according to the present embodiment includes a surface pressure sensor detection unit 6f instead of the photoelectric sensor detection unit 6a. The surface pressure sensor detection unit 6f can detect which sensor element 11a has received the surface pressure. When the surface pressure is detected by the sensor element 11a farther from the entrance / exit 10g after the surface pressure is detected by the sensor element 11a closer to the entrance / exit 10g, the occupant number calculation unit 6b of the controller 6A It is determined that the vehicle has entered the rear seat space 10j. Further, when the surface pressure is detected by the sensor element 11a closer to the entrance / exit 10g after the surface pressure is detected by the sensor element 11a farther from the entrance / exit 10g, the occupant exits from the rear seat space 10j. Is determined. In this way, the occupant number calculation unit 6b enters the occupant's rear seat space 10j and the occupant's rear seat space 10j based on the movement direction of the surface pressure detection position by the surface pressure sensor member 11. Judgment of leaving. The occupant number calculation unit 6b subtracts the occupant number (ΣDout) exiting from the rear seat space 10j from the occupant number (ΣDin) entering the rear seat space 10j, and the result is in the rear seat space 10j. The number of passengers is P.
The vehicle seat belt warning device 1 </ b> A according to the present embodiment includes a navigation display 12 (corresponding to vehicle warning means) connected to the audio ECU 8 instead of the instrument panel 7. When it is detected that the seat belt device 10 i is not worn, the navigation display 12 displays a seat belt non-wearing warning in the passenger compartment 10 a instead of the instrument panel 7 by a warning display signal from the controller 6.

According to the present embodiment, the vehicle seat belt warning device 1A is provided on the floor 10k of the passenger compartment 10a and is disposed between the entrance 10g and the second row seat 10d and the third row seat 10e. A pressure sensor member 11 is provided. The occupant number calculation unit 6b determines entry into the occupant rear seat space 10j and exit from the occupant rear seat space 10j based on the moving direction of the detection position of the surface pressure by the surface pressure sensor member 11. ing. As a result, the occupant number calculation unit 6b can easily detect the occupant number P in the rear seat space 10j regardless of whether or not the second row seat 10d and the third row seat 10e are seated. . Therefore, it is possible to warn an occupant or the like lying in the rear seat space 10j without sitting on the second row seat 10d or the third row seat 10e.
Further, according to the present embodiment, the surface pressure sensor member 11 is used to detect the number of passengers P in the rear seat space 10j, and in the second row seat 10d and the third row seat 10e, There is no need for seating sensors for the number of seated persons. Therefore, even if the second row sheet 10d or the third row sheet 10e is a sheet that can be arranged, such as a split slide type, handling of sensor wiring and the like does not become complicated.
Further, according to the present embodiment, since the warning is given to the occupant based on the number P of passengers in the rear seat space 10j and the number S of seat belt devices 10i in the mounted state, the vehicle door is closed. Unlike the type that memorizes the seat belt device's wearing state at the time of being It can be performed.

<Modification of Embodiment 2>
Hereinafter, based on FIG. 9, the modification of the detection method of the passenger | crew by the surface pressure sensor member 11 is demonstrated. As shown in FIG. 9, the surface pressure sensor member 11 according to the present modification is provided on the floor 10k of the passenger compartment 10a, similar to that described in the second embodiment, and the entrance / exit 10g and the second row seat 10d. And the third row sheet 10e. Also, the surface pressure sensor member 11 has a plurality of sensor elements 11a (corresponding to space occupant detection means and contact sensors) that have different distances from the entrance 10g as described in the second embodiment. It is formed by.
In the surface pressure sensor member 11 according to this modification, a sensor group SG is formed by four adjacent sensor elements 11a (if the number is not plural, the number is not necessarily four). A plurality of sensor groups SG are formed, and some of the sensor groups SG have different distances from the entrance 10g.
In the present modification, the sensor element 11a is sandwiched between the foot FT and the floor 10k by the occupant's walking, and is configured to be able to detect contact of the occupant's foot FT with the generated surface pressure. Has been. When the surface pressure is detected by at least one sensor element 11a included in the sensor group SG, the occupant number calculation unit 6b detects the surface pressure by the sensor group SG including the sensor element 11a (FIG. 9). In FIG. 5, the sensor group SG in which the surface pressure is detected is indicated by hatching).
In addition, when the surface pressure is detected by the sensor group SG farther from the entrance 10g after the surface pressure is detected by the sensor group SG closer to the entrance 10g, the occupant enters the rear seat space 10j. Is determined. In addition, when the surface pressure is detected by the sensor group SG closer to the entrance / exit 10g after the surface pressure is detected by the sensor group SG farther from the entrance / exit 10g, the occupant exits from the rear seat space 10j. Is determined. The occupant detection method using the sensor group SG described above is the same when a capacitance sensor is used instead of the surface pressure sensor member 11. In FIG. 9, a thick arrow indicates the walking direction of the occupant.

  According to this modification, in the surface pressure sensor member 11, the sensor group SG is formed by the four adjacent sensor elements 11a. In addition, when the surface pressure is detected by at least one sensor element 11a included in the sensor group SG, the surface pressure is detected by the sensor group SG including the sensor element 11a. As a result, the position of the occupant's foot FT detected by the surface pressure sensor member 11 does not vary, and the occupant number calculation unit 6b exits the occupant entering the rear seat space 10j and the rear seat space 10j. An occupant can be accurately determined. Therefore, the occupant number calculation unit 6b can accurately detect the occupant number P in the rear seat space 10j.

<Embodiment 3>
Hereinafter, the difference between the vehicle seat belt warning device 1B according to the third embodiment and the vehicle seat belt warning device 1 according to the first embodiment will be described with reference to FIGS. 10 and 11. As shown in FIG. 11, the vehicle seat belt warning device 1 </ b> B includes an indoor camera 13 (corresponding to a space occupant detection means and a camera device) mounted in the passenger compartment 11 a instead of the photoelectric sensor unit 2. Yes. The indoor camera 13 images the entrance / exit 10g from the inside of the passenger compartment 11a. The indoor camera 13 is formed by a CCD camera, but is not limited thereto, and may be a CMOS camera, a MOS camera, an infrared camera, or the like. In addition, the indoor camera 13 is not limited to the one that is permanently installed in the vehicle 10, and may be a type that is brought in from the outside of the vehicle.

  On the other hand, as shown in FIG. 10, the controller 6B according to the present embodiment has an image processing unit 6g instead of the photoelectric sensor detection unit 6a. The image processing unit 6g performs image processing on image data captured by the indoor camera 13 and detects an occupant in the rear seat space 10j. The occupant number calculation unit 6b acquires the number of occupants entering the rear seat space 10j and the number of occupants leaving the rear seat space 10j based on the detection result by the image processing unit 6g. The occupant number calculation unit 6b subtracts the occupant number (ΣDout) exiting from the rear seat space 10j from the number of occupants (ΣDin) entering the rear seat space 10j, and the result is in the rear seat space 10j. The number of passengers is P.

According to the present embodiment, the vehicle seat belt warning device 1 </ b> B includes the indoor camera 13 attached in the passenger compartment 11 a instead of the photoelectric sensor unit 2. The occupant number calculation unit 6b acquires the number of occupants entering the rear seat space 10j (ΣDin) and the number of occupants leaving the rear seat space 10j (ΣDout) based on image data captured by the indoor camera 13. Yes. Thereby, the number-of-passengers calculation unit 6b can accurately detect the number of passengers entering the rear seat space 10j (ΣDin) and the number of passengers leaving the rear seat space 10j (ΣDout). The number of passengers P in the space 10j can be accurately detected.
In addition, according to the present embodiment, the indoor camera 13 is used to detect the number of passengers P in the rear seat space 10j, and the number of seated persons in the second row seat 10d and the third row seat 10e. Minute seating sensors are not required. Therefore, even if the second row sheet 10d or the third row sheet 10e is a sheet that can be arranged, such as a split slide type, handling of sensor wiring and the like does not become complicated.
Further, according to the present embodiment, since the warning is given to the occupant based on the number P of passengers in the rear seat space 10j and the number S of seat belt devices 10i in the mounted state, the vehicle door is closed. Unlike the type that memorizes the seat belt device's wearing state at the time when the seat is worn and warns when switching from the wearing state to the non-wearing state, it also warns passengers who are not wearing the seat belt device from the beginning. It can be performed.

<Embodiment 4>
Hereinafter, the difference between the vehicle seat belt warning device 1 according to the fourth embodiment and the vehicle seat belt warning device 1 according to the first embodiment will be described with reference to FIG. The configuration of the vehicle seat belt warning device 1 according to the present embodiment is the same as that shown in FIG. As shown in FIG. 12, the photoelectric sensor unit 2A (corresponding to the space occupant detection means) in the present embodiment is provided inside the passenger compartment 10a of the entrance 10g and detects that the occupant passes through the entrance 10g. It is made possible.
The photoelectric sensor unit 2A includes a third light emitting sensor 2e, a third light receiving sensor 2f, a fourth light emitting sensor 2g, and a fourth light receiving sensor 2h in addition to the first light emitting sensor 2a and the first light receiving sensor 2b similar to those in the first embodiment. have. The third light emitting sensor 2e and the third light receiving sensor 2f are disposed between the photoelectric sensor device formed by the first light emitting sensor 2a and the first light receiving sensor 2b and the second row sheet 10d. The fourth light emitting sensor 2g and the fourth light receiving sensor 2h are arranged between the photoelectric sensor device formed by the first light emitting sensor 2a and the first light receiving sensor 2b and the third row sheet 10e. The first light emitting sensor 2a and the first light receiving sensor 2b correspond to the first photoelectric sensor device, the third light emitting sensor 2e and the third light receiving sensor 2f correspond to the second photoelectric sensor device, and the fourth light emitting sensor. 2g and the fourth light receiving sensor 2h correspond to a third photoelectric sensor device.

In the present embodiment, the occupant number calculation unit 6b detects that the occupant has passed the entrance 10g by the third light receiving sensor 2f after detecting that the occupant has passed the entrance 10g by the first light receiving sensor 2b. In this case, it is determined that the occupant has entered the second row seat space 10m. In addition, when it is detected by the first light receiving sensor 2b that the occupant has passed through the entrance 10g after the third light receiving sensor 2f detects that the occupant has passed through the entrance 10g, the occupant is in the second row seat space. It is determined that the vehicle has left 10m.
When the first light receiving sensor 2b detects that the occupant has passed through the entrance 10g after the first light receiving sensor 2b detects that the occupant has passed through the entrance 10g, the occupant is in the third row seat space. It is determined that the vehicle has entered 10n. Further, when it is detected by the first light receiving sensor 2b that the occupant has passed the entrance / exit 10g after the fourth light receiving sensor 2h detects that the occupant has passed the entrance / exit 10g, the occupant is in the third row seat space. It is determined that the vehicle has left 10n.
Here, the second-row seat space 10m means a space where an occupant seated on the second-row seat 10d or an occupant seated on the second-row seat 10d exists. The third row seat space 10n means a space where an occupant seated on the third row seat 10e or an occupant seated on the third row seat 10e exists.

On the other hand, the buckle switch detection unit 6c in the present embodiment distinguishes the seat belt devices 10i provided in the second row seat 10d and the third row seat 10e, and detects the number of seat belt devices 10i in the mounted state. ing.
Further, the belt unmounted number calculating section 6d in the present embodiment subtracts the number S1 of seat belt devices 10i in the mounted state in the second row seat 10d from the occupant number P1 in the second row seat space 10m. The result is the number of unmounted second row. Further, the belt non-mounting number calculation unit 6d subtracts the number S2 of the seat belt devices 10i in the third row seat 10e in the third row seat 10e from the number P2 of passengers in the third row seat space 10n. The number of eyes is not installed.
In addition, the warning control unit 6e in the present embodiment has a case where the number of unattached second rows exceeds 0, that is, in the second row seat space 10m (corresponds to the second row seat space). When the number of occupants P1 is greater than the number S1 of seat belt devices 10i in the second row seat 10d, the instrument panel 7 and the speaker device 9 are operated to seat the second row seat 10d. A warning is given that the belt device 10i is not attached. Further, when the number of unmounted third rows exceeds 0, that is, the number of passengers P2 in the third row seat space 10n (corresponding to the third row seat space) is the third row seat. When the number S2 of seat belt devices 10i in the mounted state is greater than S2, the instrument panel 7 and the speaker device 9 are operated to confirm that the seat belt device 10i is not mounted on the third row seat 10e. Warning.

According to the present embodiment, the warning control unit 6e warns that the seat belt device 10i is not attached to the second row seat 10d when the number of unattached second row exceeds 0, and the third row When the number of unattached eyes exceeds 0, a warning is given that the seat belt device 10i is not attached to the third row seat 10e. As a result, it is possible to inform which of the occupants in the second row seat space 10m and the occupants in the third row seat space 10n is not wearing the seat belt device 10i. The occupant who is not wearing the device 10i can be alerted directly.
Further, according to the present embodiment, the photoelectric sensor unit 2A is used to detect the number P of passengers in the rear seat space 10j, and the second row seat 10d and the third row seat 10e are seated. There is no need for seating sensors for the number of people. Therefore, even if the second row sheet 10d or the third row sheet 10e is a sheet that can be arranged, such as a split slide type, handling of sensor wiring and the like does not become complicated.
Further, according to the present embodiment, since the warning is given to the occupant based on the number P of passengers in the rear seat space 10j and the number S of seat belt devices 10i in the mounted state, the vehicle door is closed. Unlike the type that memorizes the seat belt device's wearing state at the time when the seat is worn and warns when switching from the wearing state to the non-wearing state, it also warns passengers who are not wearing the seat belt device from the beginning. It can be performed.

<Other embodiments>
The present invention is not limited to the above-described embodiments, and can be modified or expanded as follows.
In the vehicle seat belt warning device 1 according to the present invention, the occupant number calculation unit 6b subtracts the occupant number (ΣDout) exiting from the rear seat space 10j from the occupant number (ΣDin) entering the rear seat space 10j. Then, instead of setting the result as the number of passengers P in the rear seat space 10j, for example, the number of passengers P in the rear seat space 10j is directly detected based on image data captured by the indoor camera 13. May be. Thereby, when the vehicle seat belt warning device 1 is activated, the number of passengers P can be calculated in consideration of the number of passengers already in the rear seat space 10j.
Further, a head-up display may be used instead of the instrument panel 7 and the navigation display 12. Further, a seat belt non-wearing warning may be displayed on a display device of a type that a passenger brings from outside the vehicle, such as a display of a mobile phone.
The vehicle seat belt warning device 1 according to the present invention can also be applied to a seat belt device provided in a rear seat of a wagon type vehicle or a seat belt device provided in a rear seat of a sedan type vehicle. is there. Further, the vehicle seat belt warning device 1 according to the present invention can be applied to a vehicle in which the rear door 10h is a hinge door. The vehicle seat belt warning device 1 according to the present invention can also be applied to a vehicle in which the entrance 10g is formed on the right side surface of the body 10f.

  In the drawings, 1, 1A, 1B are vehicle seat belt warning devices, 2 is a photoelectric sensor unit (space occupant detection means, a pair of photoelectric sensor devices), 2A is a photoelectric sensor unit (space occupant detection means), and 2a is the first. Light emitting sensor (the other photoelectric sensor device, first photoelectric sensor device), 2b is a first light receiving sensor (the other photoelectric sensor device, first photoelectric sensor device), 2c is a second light emitting sensor (one photoelectric sensor device), 2d is a second light receiving sensor (one photoelectric sensor device), 2e is a third light emitting sensor (second photoelectric sensor device), 2f is a third light receiving sensor (second photoelectric sensor device), and 2g is a fourth light emitting sensor (second photoelectric sensor device). 3 photoelectric sensor device), 2h is a fourth light receiving sensor (third photoelectric sensor device), 3 is a buckle switch (seat belt detecting means), 6b is an occupant number calculation unit (occupant number detecting means), and 6c is a buckle switch. H is a warning control unit (warning control means), 7 is an instrument panel (vehicle warning means), 9 is a speaker device (vehicle warning means), 10 is a vehicle, 10a is Cabin, 10d is the second row seat (rear seat), 10e is the third row seat (rear seat), 10g is the entrance / exit, 10i is the seat belt device (seat belt), 10j is the rear seat space, 10k Is the floor for the second row seat, 10n is the space for the third row seat, 11a is the sensor element (space occupant detection means, contact sensor), 12 is the navigation display (vehicle warning means), 13 is the indoor camera (Space occupant detection means, camera device), FT indicates a foot, and SG indicates a sensor group.

Claims (6)

Vehicle warning means (7, 9, 12) for issuing a warning to the passenger in the passenger compartment (10a);
Space occupant detection means (2, 2A, 11, 13) for detecting an occupant in the rear seat space (10j) regardless of whether the vehicle (10) is seated in the rear seat (10d, 10e). When,
A seat belt detection means (3) for detecting whether or not the seat belt (10i) provided on the rear seat is attached;
Occupant number detection means (6b) for detecting the number of occupants in the space for the rear seats based on the detection result by the space occupant detection means;
A belt wearing number detecting means (6c) for calculating the number of the seat belts in the worn state based on a detection result by the seat belt detecting means;
The vehicle warning means when the number of occupants in the rear seat space detected by the occupant number detection means is larger than the number of seat belts in the wearing state detected by the belt wearing number detection means. the by operating a warning control means for performing a warning to the occupant (6e),
The occupant number detection means acquires the number of occupants entering the rear seat space and the number of occupants leaving the rear seat space based on the detection result by the space occupant detection means, and the rear seat space A vehicle seat belt warning device (1, 1A, 1B) that uses the result of subtracting the number of passengers exiting from the rear seat space as the number of passengers in the rear seat space . The space occupant detection means
It is formed by a pair of photoelectric sensor devices (2a, 2b, 2c, 2d) provided on the vehicle interior side of the entrance / exit for the rear seat (10g) and capable of detecting that an occupant passes through the entrance / exit. , One of the photoelectric sensor devices (2c, 2d) is disposed on the vehicle interior side by a predetermined distance with respect to the other photoelectric sensor device (2a, 2b),
The occupant number detection means
When it is detected by the one photoelectric sensor device that the occupant has passed the entrance / exit after the other photoelectric sensor device detects that the occupant has passed the entrance / exit, the occupant enters the rear seat space. It is determined that it has entered,
After detecting that the occupant has passed through the entrance / exit using the one photoelectric sensor device, and when detecting that the occupant has passed the entrance / exit using the other photoelectric sensor device, the occupant is removed from the rear seat space. vehicle seat belt warning device determines according to claim 1, wherein the exited. The rear seat is
Including at least a second row seat (10d) and a third row seat (10e),
The space occupant detection means
A first photoelectric sensor device (2a, 2b) that is provided on the vehicle interior side of the entrance / exit for the rear seat (10g) and capable of detecting that an occupant passes through the entrance / exit;
A second photoelectric sensor device (2e, 2f) disposed between the first photoelectric sensor device and the second row seat and capable of detecting that an occupant passes through the entrance;
A third photoelectric sensor device (2g, 2h) disposed between the first photoelectric sensor device and the third row seat and capable of detecting an occupant passing through the entrance;
Have
The occupant number detection means
When the first photoelectric sensor device detects that an occupant has passed through the entrance / exit after detecting that the occupant has passed through the entrance / exit, the occupant is in the second row seat space. (10m)
When it is detected by the first photoelectric sensor device that the occupant has passed the entrance / exit after the second photoelectric sensor device detects that the occupant has passed the entrance / exit, the occupant is for the second row seat. Judge that you have left the space,
When the first photoelectric sensor device detects that the occupant has passed the entrance / exit after detecting that the occupant has passed the entrance / exit by the third photoelectric sensor device, the occupant is in the third row seat space. (10n)
When the third photoelectric sensor device detects that the occupant has passed the entrance / exit after detecting that the occupant has passed the entrance / exit by the first photoelectric sensor device, the occupant is for the third row seat. Judge that you have left the space,
The belt wearing number detecting means includes
Distinguishing the seat belts provided in the second row seat and the third row seat, and detecting the number of seat belts in the mounted state;
The warning control means includes
When the number of occupants in the second row seat space is greater than the number of seat belts in the second row seat, the vehicle warning means is operated to activate the second row seat. Warn that the seat belt is not worn in
When the number of occupants in the third row seat space is greater than the number of seat belts in the mounted state in the third row seat, the vehicle warning means is operated to activate the third row seat. vehicle seat belt warning apparatus according to claim 1, wherein said seat belt warning that not mounted in. The space occupant detection means
A plurality of contact sensors (11a) provided on the floor (10k) of the passenger compartment and disposed between the rear seat entrance / exit (10g) and the rear seat and having different distances from the entrance / exit. )
The occupant number detection means
When the contact of the foot part (FT) of the occupant is detected by the contact sensor closer to the entrance / exit, and the contact is detected by the contact sensor far from the entrance / exit, the occupant Has entered the space for the rear seats,
When contact is detected by the contact sensor closer to the entrance / exit after the contact of the foot part of the occupant is detected by the contact sensor far from the entrance / exit, vehicle seat belt warning device determines according to claim 1 wherein the drops from the rear seat space. The space occupant detection means
A plurality of contact sensors (11a) provided on the floor (10k) of the passenger compartment and disposed between the entrance / exit for a rear seat (10g) and the rear seat;
A plurality of adjacent contact sensors form a sensor group (SG), a plurality of the sensor groups are formed, and the plurality of sensor groups have different distances from the entrance / exit,
The occupant number detection means
When the contact of the occupant's foot (FT) is detected by at least one of the contact sensors included in the sensor group, the sensor group including the contact sensor detects the occupant's foot. Suppose contact is detected,
If the sensor group closer to the entrance / exit is detected by the sensor group farther from the entrance / exit after the contact of the foot part of the occupant is detected by the sensor group, It is determined that it has entered the business space,
When the contact of the foot part of the occupant is detected by the sensor group farther from the entrance / exit, and the contact is detected by the sensor group closer to the entrance / exit, the occupant is in the rear seat vehicle seat belt warning device determines according to claim 1, wherein the use space and exited. The space occupant detection means
A camera device (13) for photographing the entrance / exit for the rear seat (10g) from the vehicle interior side;
The occupant number detection means
On the basis of the image captured by the camera device, the number of occupants to enter into the rear seat space, the vehicle seat belt warning apparatus according to claim 1, wherein acquiring the number of passengers exiting from the rear seat space.

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