JP2020132120A - Occupant detection device, vehicular door device, and vehicular seat device - Google Patents

Abstract

To determine a tilted posture of an occupant who sits on a seat.SOLUTION: A massage device 5 as an occupant detection device 50 comprises: a plurality of air bags 20 which are provided in a seat 1 of a vehicle, thereby receiving a load of an occupant who sits on the seat 1; and a control unit 21 which controls air supply/exhaust for each air bag 20. The control unit 21 comprises a control unit 40 which functions as an internal pressure detection unit 75a which detects internal pressure Pa to Ph of respective air bag 20a to 20h by use of a pressure sensor 35. The control unit 40 has functions as an internal pressure deflection detection unit 75b which detects deflection of internal pressure P generated between respective air bags 20a to 20h by comparison of a detection value of each internal pressure Pa to Ph, and as a tilted posture determination unit 75c which determines that a posture of the occupant is tilted in a direction in which deflection occurs in each internal pressure P.SELECTED DRAWING: Figure 3

Description

The present invention relates to an occupant detection device, a vehicle door device, and a vehicle seat device.

Conventionally, there is an occupant detection device capable of determining the posture of an occupant sitting on a vehicle seat. For example, the sheet described in Patent Document 1 has a plurality of capacitance sensor electrodes built in the sheet back. Then, by using each of these capacitance sensor electrodes, it is possible to detect that the occupant of the seat is in a so-called rear-back posture leaning against the seat back.

Further, in the above-mentioned conventional example, a load sensor is also used for the occupant detection. As a result, the posture of the occupant is accurately determined based on the physique of the occupant seated on the seat, and the operation of the airbag device is controlled.

JP-A-2004-90717

However, in recent years, in vehicles, not only the deployment control of the airbag as seen in the above-mentioned conventional example, but also the posture of the occupant sitting on the seat has been taken into consideration in various control fields. At the same time, there is still room for improvement in this respect because diversity is required for the occupant detection method including the sitting posture.

The present invention has been made to solve the above problems, and an object of the present invention is an occupant detection device, a vehicle door device, and a vehicle seat capable of determining an inclined posture of a occupant seated on a seat. To provide the equipment.

The occupant detection device that solves the above problems includes a plurality of air bags that are provided on the seat of the vehicle and receive the load of the occupant seated on the seat, an internal pressure detection unit that detects the internal pressure of each of the air bags, and each of the above. An internal pressure deflection detection unit that detects the deflection of the internal pressure generated between the air bags by comparing the detected values of the internal pressure, and an inclined posture that determines that the posture of the occupant is tilted in the direction in which the deflection occurs. It includes a determination unit.

That is, when the posture of the occupant seated on the seat is tilted, the internal pressure is deflected between the plurality of air bags that receive the load. Therefore, according to the above configuration, it is possible to determine the tilted posture of the occupant using each of the air bags provided on the seat.

The occupant detection device that solves the above problems includes an internal pressure initial value holding unit that holds the detected value of each internal pressure detected when the seat belt provided on the seat is fastened as the initial value of the internal pressure, and the inclination thereof. When the detected value of the internal pressure of the air bag located in the direction in which the deflection occurs is larger than the initial value of the internal pressure, the posture determination unit determines the posture of the occupant in the direction in which the deflection occurs. It is preferable to determine that is tilted.

That is, when the occupant seated on the seat wears the seat belt, the seating posture is corrected. Therefore, as in the above configuration, the magnitude of the deflection generated in the internal pressure of each air bag can be correctly evaluated by comparing the value of the internal pressure detected at this time with the current detected value as the initial value. .. As a result, it is possible to accurately determine the tilted posture of the occupant seated on the seat.

In the occupant detection device that solves the above problems, it is preferable that each of the air bags is provided inside a cushion member that is detachably configured with respect to the seat.
According to the above configuration, it is possible to add a function of determining the inclined posture of the occupant to the seat of the vehicle which does not have the function of determining the inclined posture of the occupant as a retrofit.

The occupant detection device that solves the above-mentioned problems is when the door of the vehicle located on the side of the seat is operated in a state where it is determined that the occupant's posture is in an outward leaning posture tilted outward in the vehicle width direction. It is preferable to provide an alarm output unit that executes an alarm output.

Vehicle door devices that solve the above problems include one of the above occupant detection devices, an opening / closing drive device that opens / closes the door of the vehicle located on the side of the seat, and the posture of the occupant is outside in the vehicle width direction. It is provided with an opening / closing drive prohibiting unit for prohibiting opening / closing drive of the door in a state where it is determined that the door is in a leaning outward posture.

According to each of the above configurations, it is possible to avoid interference between the occupant of the seat in the outer leaning posture and the side door, and to ensure high safety.
The vehicle seat device that solves the above problems is an occupant detection device, the air bag for side support that supports the occupant's side, and an inclined posture in which the occupant's posture is tilted in the vehicle width direction. When it is determined, the support strengthening portion for expanding the air bag for the side support located in the direction in which the posture of the occupant is tilted is provided.

According to the above configuration, it is possible to secure high support performance according to the inclined posture of the occupant.

According to the present invention, it is possible to determine the tilted posture of the occupant sitting on the seat.

A perspective view of a seat equipped with a massage device that functions as an occupant detection device. A plan view of a cushion member provided with a plurality of air bags inside. Schematic diagram of a massage device that functions as an occupant detection device. A flowchart showing a processing procedure of massage control. A flowchart showing a processing procedure at the time of starting. The flowchart which shows the processing procedure of the occupant detection based on the internal pressure detection of an air bag. (A) is an explanatory view of the outer leaning posture, and (b) is an explanatory view of the inner leaning posture. The flowchart which shows the processing procedure of the inclination posture determination based on the internal pressure detection of each air bag. A flowchart showing a processing procedure of vehicle control based on a sitting posture of an occupant. The schematic block diagram of another example occupant detection device. Explanatory drawing of the back posture. The flowchart which shows the processing procedure of the inclined posture determination of another example based on the internal pressure detection of an air bag. Explanatory view of forward leaning posture. The flowchart which shows the processing procedure of the inclined posture determination of another example based on the internal pressure detection of an air bag. The schematic block diagram of another example occupant detection device. The flowchart which shows the processing procedure of the support strengthening control based on the inclination posture determination.

Hereinafter, an embodiment in which the occupant detection device is embodied in a retrofit type massage device will be described with reference to the drawings.
As shown in FIG. 1, the vehicle seat 1 includes a seat cushion 2 and a seat back 3 provided at a rear end portion of the seat cushion 2. A headrest 4 is provided at the upper end of the seat back 3. The seat 1 of the present embodiment is equipped with a massage device 5 for massaging the occupant seated on the seat 1.

As shown in FIGS. 1 and 2, the massage device 5 of the present embodiment includes a cushion member 10 configured to be removable from the seat 1. In the massage device 5 of the present embodiment, the cushion member 10 is placed on the seat cushion 2. Further, the cushion member 10 is provided with a plurality of air bags 20 that expand by supplying air and contract by discharging the filled air. The massage device 5 of the present embodiment includes a control device 21 that controls the air supply and exhaust of each of these air bags 20.

More specifically, as shown in FIGS. 2 and 3, the massage device 5 of the present embodiment is provided side by side in two rows on the left and right and four rows on the front and back inside the cushion member 10 with the seat width direction as the left and right direction. It is provided with a plurality of air bags 20a to 20h. In the massage device 5 of the present embodiment, each of these air bags 20 is provided inside the skin 10s forming the design surface 22 of the cushion member 10. The massage device 5 of the present embodiment includes a flow path L communicating with each of these air bags 20, an air pump 25 for pumping air to each air bag 20 through the flow path L, and a flow path L thereof. It is provided with a plurality of valve devices 30 provided in the middle of the above.

Specifically, the massage device 5 of the present embodiment has an independent main line L0 extending from the air pump 25 and an independent main line L0 extending from the main line L0 and extending to each corresponding air bag 20 as its flow path L. It has eight branch lines L1 to L8. Further, independent supply / exhaust valves 31a to 31h are provided on each of these branch lines L1 to L8. Further, the main line L0 is provided with a check valve 32 at a position near the air pump 25 which is the base end thereof. The massage device 5 of the present embodiment includes an exhaust valve 33 provided at a position serving as a terminal of the main line L0.

More specifically, in the massage device 5 of the present embodiment, each of the air supply / exhaust valves 31a to 31h connects each air bag 20a to 20h to the main line L0 of the flow path L via the corresponding branch lines L1 to L8. It has a communication position for communication. Further, each of these supply / exhaust valves 31a to 31h has a shutoff position for shutting off the corresponding air bags 20a to 20h from the main line L0 of the flow path L, respectively. Further, each of these supply / exhaust valves 31a to 31h has an exhaust position in which the air filled in the corresponding air bags 20a to 20h is discharged to the outside regardless of the operating state of the air pump 25. ing. Then, in the massage device 5 of the present embodiment, the valve operating positions of the air supply / exhaust valves 31 having such a configuration as a three-way valve are switched, so that each of the air bags 20 for the massage is independently provided. It is configured to scale.

Specifically, in the massage device 5 of the present embodiment, the operations of the supply / exhaust valves 31a to 31h, the exhaust valves 33, and the air pump 25 are controlled by the control unit 40. Further, a pressure sensor 35 is provided at a position between the check valve 32 and the exhaust valve 33 on the main line L0 of the flow path L. Then, based on the output signal of the pressure sensor 35, the control unit 40 of the present embodiment applies the internal pressures Pa to Ph of the air bags 20a to 20h arranged at the positions where the load of the occupant seated on the seat 1 is received. , Each is configured to detect independently.

That is, with the air pump 25 stopped, the specific air supply / exhaust valve 31 is controlled to the communication position, and all the remaining air supply / exhaust valves 31 are controlled to the shutoff position, so that the main line L0 provided with the pressure sensor 35 is reached. The pressure in the communicating flow path L becomes equal to the internal pressure P of the air bag 20 corresponding to the specific air supply / exhaust valve 31 controlled at the communication position. Then, the pressure in the flow path L is controlled by controlling all the supply / exhaust valves 31a to 31h provided in the branch lines L1 to L8 to the shutoff position and opening the exhaust valves 33 provided in the main line L0. It will be reset.

The control unit 40 of the present embodiment independently executes such a series of operations for each of the air bags 20a to 20h provided on the cushion member 10. Then, the massage device 5 of the present embodiment serves as an occupant detection device 50 capable of determining the posture of the occupant seated on the seat 1 based on the internal pressures Pa to Ph of each of the air bags 20a to 20h detected thereby. It has a function.

More specifically, the massage device 5 of the present embodiment includes an operation switch 51 that receives a massage execution request by the user. The control unit 40 of the present embodiment is configured to execute the massage control based on the operation input to the operation switch 51.

That is, as shown in the flowchart of FIG. 4, in the massage device 5 of the present embodiment, the control unit 40 shifts to the massage mode by detecting the operation input to the operation switch 51 (step 101: YES) (step 101: YES). 102). For example, the control unit 40 of the present embodiment sequentially expands and contracts the corresponding air bags 20a to 20h in the order of arrangement in the front-rear direction while driving the air pump 25. The massage device 5 of the present embodiment has a configuration in which the expanding and contracting air bags 20a to 20h press the buttocks and thighs of the occupant seated on the seat 1 to obtain the massage effect. There is.

Further, when there is no operation input to the operation switch 51 (step 101: NO), the control unit 40 of the present embodiment stops the air pump 25 and waits for the massage execution request (step 103). The massage device 5 of the present embodiment is configured such that the control unit 40 executes the occupant detection determination based on the internal pressure detection of the air bags 20a to 20h in this standby mode.

More specifically, as shown in the flowchart of FIG. 5, in the massage device 5 of the present embodiment, when the ignition signal Sigma of the vehicle is turned on (step 201: YES), the control unit 40 thereof is set for a predetermined time. Air supply control for each of the air bags 20a to 20h provided inside the cushion member 10 is executed (step 202). Next, when the control unit 40 of the present embodiment receives a seatbelt signal Sbr (see FIG. 1) indicating that the occupant has fastened the seatbelt 57 on the seat 1 on which the cushion member 10 is installed. (Step 203: YES), the internal pressures Pa to Ph of each of these air bags 20a to 20h are detected (step 204). Then, the detected values of the internal pressures Pa to Ph are stored in the storage area 65 as the initial values αa to αh of the internal pressures Pa to Ph (step 205), and then the mode shifts to the standby mode (step 206). ..

That is, the massage device 5 of the present embodiment supplies air to each of the air bags 20a to 20h for a predetermined time executed in step 202 even in the standby mode in which the air bags 20a to 20h are not expanded or contracted. It is filled with the amount of air corresponding to the control. The air filled in each of the air bags 20a to 20h is exhausted when the ignition signal Sigma is turned off. Further, the control unit 40 of the present embodiment also executes air supply control for each of the air bags 20a to 20h in the same manner as in step 202 when shifting from the massage mode to the standby mode. As a result, the massage device 5 of the present embodiment can detect the internal pressures Pa to Ph of each of the air bags 20a to 20h at an arbitrary timing when the control unit 40 is in the standby mode. It has become.

Further, as shown in the flowchart of FIG. 6, when in the standby mode, the control unit 40 of the present embodiment detects the internal pressures Pa to Ph of each of the air bags 20a to 20h in a predetermined detection cycle (step 301). .. Further, the control unit 40 calculates the total internal pressure value PX obtained by summing the detected values of the respective internal pressures Pa to Ph (PX = Pa + Pb + ... + Ph, step 302), and compares the total internal pressure value PX with a predetermined threshold value TH0. (Step 303). Then, when the total internal pressure value PX is larger than the threshold value TH0 (PX> TH0, step 303: YES), it is determined that the occupant seated on the seat 1 is an adult occupant (step 304). The tilt posture determination is executed (step 305).

Specifically, as shown in FIG. 2, in the massage device 5 of the present embodiment, each of the air bags 20a to 20d is on the left side (with respect to the center line N in the seat width direction that divides the cushion member 10 into left and right). It is located on the left side in FIG. 2). The remaining air bags 20e to 20h are arranged on the right side (right side in FIG. 2) with the center line N in the seat width direction at a position symmetrical with each of the air bags 20a to 20d. ing.

Further, as shown in FIGS. 2 and 7 (a) and 7 (b), in the sheet 1 on which the massage device 5 of the present embodiment is installed, the right side (in FIG. 2, right side, in FIG. 7) is directed toward the front. , Left side) is outside in the vehicle width direction, and the left side (in FIG. 2, left side, FIG. 7, right side) is inside in the vehicle width direction toward the front. Based on this point, the control unit 40 of the present embodiment has an internal pressure P for each of the air bags 20a to 20d arranged on the left side of the cushion member 10 and each of the air bags 20e to 20h arranged on the right side. Compare the detected values of. As a result, as the tilted posture of the occupant 60 seated on the seat 1, the "outside leaning posture" tilted outward in the vehicle width direction as shown in FIG. 7A, that is, leaning against the slide door 62 on the side of the seat 1. It is possible to determine which of the so-called "door leaning posture" such as hanging and the "inner leaning posture" tilted inward in the vehicle width direction as shown in FIG. 7B.

More specifically, as shown in the flowchart of FIG. 8, when the control unit 40 of the present embodiment detects the internal pressures Pa to Ph of each of the air bags 20a to 20h (step 401), it is subsequently held in the storage area 65. The initial values αa to αh of each internal pressure Pa to Ph are read out (step 402). Further, the control unit 40 divides each of the air bags 20a to 20h into two parts in the vehicle width direction, the inside and the outside, based on the arrangement of the air bags 20a to 20h in the cushion member 10. As a result, for each of the air bags 20a to 20d arranged inside in the vehicle width direction, the total PI of the inside internal pressure detection values indicating the total value of the internal pressures Pa to Pd is calculated, and the air bags are arranged outside in the vehicle width direction. The total PO of the outer internal pressure detection values indicating the total value of each of the air bags 20e to 20h is calculated (step 403).

That is, in this step 403, the control unit 40 of the present embodiment sums the detected values of the internal pressures Pa to Pd of the air bags 20a to 20d arranged inside the seat 1 in the vehicle width direction. , The total PI of the inner pressure detection value is calculated (PI = Pa + Pb + Pc + Pd). Similarly, for each of the air bags 20e to 20h arranged on the outer side in the vehicle width direction, the total PO of the outer internal pressure detected values is calculated by summing the detected values of the respective internal pressures Pe to Ph. (PO = Pe + Pf + Pg + Ph).

Further, the control unit 40 of the present embodiment adds up the initial values αa to αd of the internal pressures Pa to Pd of the air bags 20a to 20d arranged inside the seat 1 in the vehicle width direction. The total internal pressure initial value αI is calculated (αI = αa + αb + αc + αd). Similarly, for each of the air bags 20e to 20h arranged outside in the vehicle width direction, the total outer internal pressure initial value αO is calculated by summing the initial values αe to αh of each of these internal pressures Pe to Ph. (ΑO = αe + αf + αg + αh, step 404).

Next, the control unit 40 of the present embodiment compares the value obtained by subtracting the total PI of the internal pressure detection values from the total PO of the external internal pressure detection values with the predetermined threshold value TH1 (step 405). Further, when the value obtained by subtracting the total PI of the inner pressure detection values from the total PO of the outer internal pressure detection values is larger than the threshold value TH1 ((PO-PI)> TH1, step 405: YES), the control unit 40 subsequently continues. The value obtained by subtracting the total external internal pressure initial value αO from the total external internal pressure detected value PO is compared with the predetermined threshold value TH2 (step 406). Then, in the control unit 40 of the present embodiment, when the value obtained by subtracting the total external internal pressure initial value αO from the total external internal pressure detection value PO is larger than the threshold value TH2 ((PO-αO)> TH2, step 406: YES). In addition, it is determined that the posture of the occupant 60 seated on the seat 1 is the outward leaning posture (step 407).

On the other hand, in step 405, when the value obtained by subtracting the total PI of the internal pressure detection values from the total PO of the external internal pressure detection values is equal to or less than the threshold value TH1 ((PO-PI) ≤ TH1, step 405: NO), then, the same. The value obtained by subtracting the total PO of the detected outer pressure values from the total PI of the detected inner pressure values is compared with the predetermined threshold value TH1 (step 408). Further, when the value obtained by subtracting the total PO of the outer internal pressure detection values from the total PI of the inner internal pressure detection values is larger than the threshold value TH1 ((PI-PO)> TH1, step 408: YES), the control unit 40 further inside. The value obtained by subtracting the total internal pressure initial value αI from the total internal pressure detection value PI is compared with the predetermined threshold value TH2 (step 409). Then, in the control unit 40 of the present embodiment, when the value obtained by subtracting the total internal pressure initial value αI from the total internal pressure detection value PI is larger than the threshold value TH2 ((PI-αI)> TH2, step 409: YES). In addition, it is determined that the posture of the occupant 60 seated on the seat 1 is the inner leaning posture (step 410).

In the control unit 40 of the present embodiment, in step 409, when the value obtained by subtracting the total internal pressure initial value αI from the total internal pressure detection value PI is the threshold value TH2 or less ((PI-αI) ≤ TH2, step. In 409: NO), the process of step 410 is not executed. Further, in step 408, when the value obtained by subtracting the total PO of the detected outer pressure values from the total PI of the detected inner pressure values is equal to or less than the threshold value TH1 ((PI-PO) ≤ TH1, step 408: NO), step 409 And the process of step 410 is not executed. Then, in step 406, when the value obtained by subtracting the total outer internal pressure initial value αO from the total outer internal pressure detection value PO is the threshold value TH2 or less ((PO-αO) ≤ TH2, step 406: NO), step 407. Do not execute the subsequent processing.

That is, in the massage device 5 of the present embodiment, when the difference value between the total PO of the outer internal pressure detection value and the total PI of the inner internal pressure detection value exceeds a predetermined threshold value TH1, the control unit 40 has a vehicle width in the seat 1. It is determined that a significant deflection of the internal pressure P has occurred between the air bags 20a to 20d arranged inside in the direction and the air bags 20e to 20h arranged outside in the vehicle width direction. Further, the control unit 40 compares the difference value between the total internal pressure detection value and the total internal pressure initial value with the predetermined threshold value TH2 for each air bag 20 located in the direction in which the internal pressure P is deflected. It is determined whether or not the total internal pressure detection value is larger than the total internal pressure initial value. Then, on condition that the internal pressure of each air bag 20 located in the direction in which the internal pressure P is deflected is increasing, the occupant 60 seated in the seat 1 in the direction in which the internal pressure P is deflected is increased. It is configured to determine that the posture is tilted.

Further, as shown in FIG. 1, the vehicle of the present embodiment is provided with an airbag device 71 that deploys an airbag (not shown) around a seat 1 on which the massage device 5 is mounted when the vehicle collides. ing. Further, this vehicle is provided with a power slide door device 72 as an opening / closing drive device for opening / closing the slide door 62 located on the side of the seat 1. Then, the massage device 5 of the present embodiment has the control device 21 for the airbag device 71 and the power slide door device 72 based on the result of the occupant detection determination executed by the control unit 40 as described above. It is configured to output control signals S1 and S2.

Further, in the massage device 5 of the present embodiment, the control device 21 also outputs the control signal S3 to the alarm device 73 provided in the vehicle. This makes it possible to execute visual and auditory alarm outputs.

More specifically, as shown in the flowchart of FIG. 9, in the massage device 5 of the present embodiment, the control unit 40 determines whether or not the occupant seated on the seat 1 is an adult (step 501), and the occupant. When is an adult (step 501: YES), it is subsequently determined whether or not the posture of the occupant is an inclined posture (step 502). Further, when the occupant's posture is an inclined posture (step 502: YES), the control unit 40 determines whether or not the inclined posture is an outward leaning posture inclined outward in the vehicle width direction (step 503). Then, when the control unit 40 of the present embodiment determines that the posture of the occupant is the outward leaning posture (step 503: YES), the control unit 40 sideways to the seat 1 through the output of the control signal S2 to the power slide door device 72. The opening / closing drive of the slide door 62 is prohibited (step 504), and the alarm output via the alarm device 73 is executed (step 505).

Further, when the control unit 40 of the present embodiment determines in step 502 that the posture of the occupant is the tilted posture, the control unit 40 passes the control signal S1 to the airbag device 71 regardless of the tilted posture. The deployment operation is prohibited (step 506). Further, even when the control unit 40 determines in step 501 that the occupant seated on the seat 1 is not an adult (step 501: NO), the control unit 40 also executes the step 506 to deploy the airbag device 71. Prohibit operation. The massage device 5 of the present embodiment makes it possible to ensure high safety of the seat 1 provided with the massage device 5.

If the control unit 40 of the present embodiment determines in step 503 that the posture of the occupant is not the outward leaning posture (step 503: NO), the processes of steps 504 and 505 are not executed. Further, in step 502, if it is determined that the posture of the occupant is not the inclined posture (step 502: NO), the processes after step 503 are not executed. When the control unit 40 of the present embodiment is determined to be in the outward leaning posture of the occupant seated on the seat 1, only during the opening / closing operation using the power slide door device 72 as described above. However, even when the slide door 62 located on the side of the seat 1 is manually operated, the alarm output is executed via the alarm device 73.

Next, the effect of this embodiment will be described.
(1) The massage device 5 as the occupant detection device 50 is provided on the seat 1 of the vehicle, so that a plurality of air bags 20 that receive the load of the occupant seated on the seat 1 and the supply to each of the air bags 20 are supplied. A control device 21 for controlling exhaust is provided. Further, the control device 21 includes a control unit 40 having a function as an internal pressure detecting unit 75a for detecting the internal pressures Pa to Ph of each of the air bags 20a to 20h by using the pressure sensor 35. Then, the control unit 40 detects the deflection of the internal pressure P generated between the air bags 20a to 20h by comparing the detected values of the internal pressures Pa to Ph, and the internal pressure deflection detecting unit 75b and each internal pressure thereof. It has a function as a tilted posture determining unit 75c for determining that the posture of the occupant is tilted in the direction in which P is deflected.

That is, when the posture of the occupant seated on the seat 1 is tilted, the internal pressure P is deflected between the air bags 20 that receive the load. Therefore, according to the above configuration, the inclined posture of the occupant can be determined by using the plurality of air bags 20 provided on the seat 1.

(2) The control unit 40 holds the detected values of the internal pressures Pa to Ph detected when the seatbelt 57 provided on the seat 1 is attached as the initial values αa to αh of the internal pressures Pa to Ph. It has a function as a holding portion 75d. Then, for the air bag 20 located in the direction in which the internal pressure P is deflected, when the detected value of the internal pressure P is higher than the initial value α of the internal pressure P, the occupant is in the direction in which the deflection is generated. Judge that the posture is tilted.

That is, when the occupant seated on the seat 1 wears the seat belt 57, the seating posture is corrected. Therefore, as in the above configuration, the magnitude of the deflection generated in the internal pressure P of each air bag 20 is correctly evaluated by comparing the value of the internal pressure P detected at this time with the current detected value as the initial value α. can do. As a result, it is possible to accurately determine the tilted posture of the occupant seated on the seat 1.

(3) Each air bag 20 is provided inside a cushion member 10 that is detachably configured with respect to the seat 1.
According to the above configuration, it is possible to add a function of determining the inclined posture of the occupant to the seat of the vehicle which does not have the function of determining the inclined posture of the occupant as a retrofit. Then, based on the determination result of the inclined posture, it is possible to optimize the vehicle control such as the deployment control of the airbag.

(4) The control unit 40 detects an outward leaning posture tilted outward in the vehicle width direction as the tilted posture of the occupant. Then, when the slide door 62 located on the side of the seat 1 is operated in such a state of being determined to be in the outward leaning posture, the alarm output unit that executes the alarm output via the alarm device 73 is executed. It has a function as 75e. As a result, it is possible to avoid interference between the occupant 60 of the seat 1 leaning on the outside and the sliding door 62, and to ensure high safety.

(5) The vehicle is provided with a power slide door device 72 as an opening / closing drive device for opening / closing the slide door 62 located on the side of the seat 1. The control unit 40 has a function as an open / close drive prohibition unit 75f that prohibits the open / close drive of the slide door 62 in a state where it is determined that the posture of the occupant seated on the seat 1 is in the outward leaning posture. As a result, it is possible to avoid interference between the occupant 60 of the seat 1 leaning on the outside and the sliding door 62, and to ensure high safety.

(6) The massage device 5 includes air bags 20e to 20h as outer air bags arranged at positions on the outer side of the seat 1 in the vehicle width direction, and inner air arranged at positions inside the seat 1 in the vehicle width direction. Each air bag 20a to 20d as a bag is provided. Further, the control unit 40 calculates the total PI of the internal pressure detection values indicating the total value of the internal pressures Pa to Pd for each of the air bags 20a to 20d arranged inside in the vehicle width direction, and arranges them outside in the vehicle width direction. The total PO of the detected outer pressure values indicating the total value of each of the air bags 20e to 20h is calculated. Further, the control unit 40 compares the total PI of the inner pressure detection values with the total PO of the outer inner pressure detection values, so that the air bags 20e to 20h as the outer air bags and the inner air bags are each. The deflection of the internal pressure P generated between the air bags 20a to 20d is determined. Then, the control unit 40 determines whether the posture of the occupant is in the outer leaning posture tilted outward in the vehicle width direction or the inner leaning posture tilted inward in the vehicle width direction. As a result, it is possible to specify the tilted posture of the occupant leaning in the vehicle width direction with a simple configuration.

(7) The control unit 40 has a function as a deployment prohibition unit 75g that prohibits the deployment operation of the airbag device 71 provided in the vehicle when it is determined that the posture of the occupant is tilted. As a result, the proper deployment operation of the airbag device 71 can be ensured, and high safety can be ensured.

The above embodiment can be modified and implemented as follows. The above-described embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

In the above embodiment, the massage device 5 as the occupant detection device 50 includes a cushion member 10 that is detachably attached to the seat 1 while being mounted on the seat cushion 2. Then, the control unit 40 is seated on the seat 1 based on the deflection of the internal pressure P generated between the air bags 20 by utilizing the plurality of air bags 20 provided inside the cushion member 10. It was decided to determine the tilted posture of the occupant.

However, not limited to this, as in the massage device 5B shown in FIG. 10, the cushion member 10B is attached to the first cushion member 10a mounted on the seat cushion 2 and the backrest surface 3s of the seat back 3. The second cushion member 10b may be provided. Then, by utilizing each of the first air bags 80a provided on the first cushion member 10a and each second air bag 80b provided on the second cushion member 10b, it is generated between the plurality of air bags 80. The occupant detection device 50B that determines the tilted posture of the occupant seated on the seat 1 may be formed based on the deflection of the internal pressure P.

For example, as shown in FIGS. 10 and 11, as the tilted posture of the occupant 60, the first cushion member 10a and the first cushion member 10a and the first cushion member 10a and the first cushion member 10a and the first cushion member 10a and the first cushion member 10a and the first cushion member 10a and the first 2 The deflection of the internal pressure P generated between the air bags 80 provided on the cushion member 10b is monitored.

Specifically, for example, as shown in the flowchart of FIG. 12, the air bag 80 on the seat cushion 2 side provided on the first cushion member 10a and the air on the seat back 3 side provided on the second cushion member 10b. The internal pressure PC and PB of the bag 80 are detected, respectively (steps 601 and 602).

Regarding the internal pressure PC of the air bag 80 on the seat cushion 2 side and the internal pressure PB of the air bag 80 on the seat back 3 side, for example, the first air bag 80a provided on the first cushion member 10a, respectively. It is preferable to use the total value and the total value of the second air bag 80b provided on the second cushion member 10b (see step 403 in FIG. 8).

Further, with respect to the internal pressure PB of the air bag 80 on the seat back 3 side, the initial value αB held in the storage area 65 is read out (step 603). As for the initial value αB of the internal pressure PB, the total value of the values detected when the seatbelt 57 is fastened may be used as in the above embodiment (see step 404 in FIG. 8).

Next, the value obtained by dividing the internal pressure PB on the seat back 3 side by the internal pressure PC on the seat cushion 2 side is compared with the predetermined threshold value TH3 (step 604). Further, when the value obtained by dividing the internal pressure PB on the seat back 3 side by the internal pressure PC on the seat cushion 2 side is larger than the threshold value TH3 ((PB / PC)> TH3, step 604: YES), subsequently, the seat back 3 For the air bag 80 on the side, a value obtained by subtracting the initial value αB from the detected value of the internal pressure PB is compared with a predetermined threshold value TH4 (step 605). Then, when the value obtained by subtracting the initial value αB from the detected value of the internal pressure PB is larger than the predetermined threshold value TH4 ((PB-αB)> TH4, step 605: YES), the occupant 60 seated on the seat 1 It may be configured to determine that the posture is a leaning posture (step 506).

Further, in the above embodiment, when determining the deflection of the internal pressure P generated in each air bag 20, the comparison is made using the difference, but as in the above alternative example, the comparison using the ratio is performed. May be good. For example, it is preferable to use a value (PI / PX, PO / PX) obtained by dividing the total inner pressure detection value PI and the outer internal pressure detection value total PO by the total internal pressure value PX, respectively. Further, the comparison is not limited to the comparison using the total value of the left and right when each air bag 20 is divided into left and right, and a more subdivided comparison may be performed. Then, the air bag 20 used for determining the deflection of the internal pressure P may be set in advance, and these internal pressures P may be compared.

Further, as shown in FIG. 13, the tilted posture of the occupant 60 may be embodied in a configuration for detecting the forward leaning posture.
For example, in the example shown in FIG. 2, the air bags 20a, 20b, 20e, and 20f provided on the cushion member 10 are arranged on the front side with the center line M that divides the cushion member 10 into front and rear halves. Further, the remaining air bags 20c, 20d, 20g, and 20h are arranged on the rear side of the center line M in the front-rear direction at positions symmetrical with the air bags 20a, 20b, 20e, and 20f, respectively. Has been done. Then, by dividing each of the air bags 20a to 20h into two parts, the front side and the rear side in the vehicle width direction, and comparing the internal pressures P of both, the deflection of the internal pressure P in the front-rear direction can be determined. ..

That is, as shown in the flowchart of FIG. 14, as in the above embodiment (see FIG. 8), first, the internal pressures Pa to Ph of the air bags 20a to 20h are detected (step 701), and the internal pressures Pa to Ph The initial values αa to αh are read out (step 702). Next, for each of the front side air bags 20a, 20b, 20e, 20f and the rear side air bags 20c, 20d, 20g, 20h in the sheet 1, the front side internal pressure detection value total PF and the rear side showing the total value, respectively. The total PR of the side internal pressure detection values is calculated (PF = Pa + Pb + Pe + Pf, PO = Pc + Pd + Pg + Ph, step 703). Then, for each of the air bags 20a, 20b, 20e, and 20f arranged on the front side of the sheet 1, the total αF of the initial value of the internal pressure on the front side is calculated (αF = αa + αb + αe + αf, step 704).

Next, the value obtained by subtracting the total PR of the posterior internal pressure detection values from the total PF of the front internal pressure detection values is compared with the predetermined threshold value TH5 (step 705). Further, when the value obtained by subtracting the total PR of the posterior internal pressure detection value from the total PF of the front internal pressure detection value is larger than the threshold value TH5 ((PF-PR)> TH5, step 705: YES), subsequently, the front internal pressure detection value. The value obtained by subtracting the total αF of the initial value of the anterior internal pressure from the total PF is compared with the predetermined threshold value TH6 (step 706). Then, when the value obtained by subtracting the total PR of the posterior internal pressure detection value from the total PF of the front internal pressure detection value is larger than the threshold value TH6 ((PF-αF)> TH6, step 706: YES), the seat 1 is seated. The occupant 60 may be determined to be in the forward leaning posture (step 707).

-In the above embodiment, it is determined whether or not the occupant seated on the seat 1 is an adult occupant, and when the occupant is an adult, the inclination posture determination is executed. It may be configured so that the adult judgment is not performed.

Further, even when the occupant's posture is the rearward leaning posture as shown in FIG. 11 or the forward leaning posture as shown in FIG. 13, the control unit 40 as the deployment prohibition unit 75g is the airbag device 71. It may be configured to prohibit the deployment operation.

In the above embodiment, when the detected value of the internal pressure P of the air bag 20 located in the direction in which the internal pressure P is deflected is larger than the initial value α of the internal pressure P, the direction in which the deflection is generated. It was decided that the occupant's posture was tilted. However, the present invention is not limited to this, and a configuration may be configured in which the determination using the initial value α of the internal pressure P is not performed.

In the above embodiment, by using each of the massage air bags 20 provided inside the cushion member 10 that is detachably attached to the seat 1, the occupant's tilted posture based on the deflection of the internal pressure P thereof. It was decided to make a judgment.

However, the present invention is not limited to this, and as shown in FIG. 15, the occupant detection device 50C that determines the tilted posture of the occupant based on the deflection of the internal pressure P by using a plurality of air bags 90 built in the seat 1C. It may be formed.

Specifically, the seat 1C has the backrest surface 3s of the seat back 3 and the inside of the left and right side support portions 3a and 3b, and the seat cushion 2 inside the seating surface 2s and the left and right side support portions 2a and 2b, respectively. , An air bag 90 for seat support is provided. Then, in this case, for example, by using the air bags 90ca, 90cc, 90ba, 90bb for side support provided in the side support portions 2a, 2b, 3a, 3b, the occupant seated on the seat 1C has a vehicle width. It is possible to determine whether the vehicle is in an outward leaning posture tilted outward in the direction or an inner leaning posture tilted inward in the vehicle width direction.

In the example shown in FIG. 15, the control device 21C that controls the air supply and exhaust of each air bag 90 functions as the internal pressure detection unit 75a, the internal pressure deflection detection unit 75b, and the inclined posture determination unit 75c in the above embodiment. .. In addition to this, the control device 21C may have at least one of the functions of the internal pressure initial value holding unit 75d, the alarm output unit 75e, the open / close drive prohibition unit 75f, and the deployment prohibition unit 75g.

-In addition, when it is determined that the posture of the occupant seated on the seat 1C is an inclined posture tilted in the vehicle width direction, the control device 21C controls the side support air bags 90ca, 90cc, which support the occupant's side. Of 90ba and 90bb, the seat control device 91 that functions as a support strengthening unit 75h that expands the one located in the direction in which the posture is tilted may be formed.

That is, as shown in the flowchart of FIG. 16, when it is determined by executing the inclination posture determination (step 801) that the posture of the occupant is the outward leaning posture (step 802: YES), the outside of the seat 1C in the vehicle width direction. Each of the air bags 90ca and 90ba for the side support located in is expanded (step 803). Then, when it is determined that the occupant's posture is the inward leaning posture (step 804: YES), the side support air bags 90cc and 90bb located inside in the vehicle width direction may be expanded (step 805). ). As a result, high support performance can be ensured according to the inclined posture of the occupant.

-In the above embodiment, the slide door 62 is arranged on the side of the seat 1, but what kind of door is located on the side of the seat 1, such as a swing door? There may be.

Next, the technical idea that can be grasped from the above-described embodiment and modified example will be described.
(A) The seat includes an outer air bag arranged at a position outside the vehicle width direction and an inner air bag arranged at a position inside the seat in the vehicle width direction, and the inclined posture determining unit is said to have the same. Based on the deflection of the internal pressure generated between the outer air bag and the inner air bag, the posture of the occupant is the outer leaning posture tilted outward in the vehicle width direction or the inner leaning posture tilted inward in the vehicle width direction. An occupant detection device characterized in determining which one it is in. As a result, it is possible to specify the tilted posture of the occupant leaning in the vehicle width direction with a simple configuration.

(B) An occupant detection device including a deployment prohibition unit that prohibits deployment operation of an airbag device provided in a vehicle when it is determined that the posture of the occupant is tilted. As a result, it is possible to ensure the proper deployment operation of the airbag device and ensure high safety.

1,1C ... Seat, 2 ... Seat cushion, 2a, 2b ... Side support part, 2s ... Seating surface, 3 ... Seat back, 3a, 3b ... Side support part, 3s ... Backrest surface, 4 ... Headrest, 5,5B ... Massage device 10,10B ... Cushion member, 10a ... First cushion member, 10b ... Second cushion member, 10s ... Skin, 20,20a to 20h ... Airbag, 21,21C ... Control device, 22 ... Design surface, 25 ... Air Pump, 30 ... valve device, 31, 31a to 31h ... air supply / exhaust valve, 32 ... check valve, 33 ... exhaust valve, 35 ... pressure sensor, 40 ... control unit, 50, 50B, 50C ... occupant detection device, 51 ... Operation switch, 57 ... Seat belt, 60 ... Crew, 62 ... Sliding door, 65 ... Storage area, 71 ... Airbag device, 72 ... Power sliding door device, 73 ... Alarm device, 75a ... Internal pressure detector, 75b ... Internal pressure deflection Detection unit, 75c ... Tilt posture determination unit, 75d ... Internal pressure initial value holding unit, 75e ... Alarm output unit, 75f ... Open / close drive prohibition unit, 75g ... Deployment prohibition unit, 75h ... Support strengthening unit, 80 ... Air bag, 80a ... 1st air bag, 80b ... 2nd air bag, 90 ... air bag, 90ba, 90bb, 90ca, 90cc ... air bag (air bag for side support), 91 ... seat control device, L ... flow path, L0 ... main line, L1 to L8 ... Branch line, P, Pa to Ph ... Internal pressure, α, αa to αh ... Initial value, PX ... Total internal pressure value, PI ... Total internal pressure detection value, PO ... Total external internal pressure detection value, αI ... Initial internal pressure Total value, αO ... Total external internal pressure, PC, PB ... Internal pressure, αB ... Initial value, PF ... Total front internal pressure detection value, αF ... Total front internal pressure value, PR ... Total rear internal pressure detection value, TH0, TH1 , TH2, TH3, TH4, TH5, TH6 ... threshold, M, N ... center line, S1, S2, S3 ... control signal, Sbr ... seat belt signal, Sigma ... ignition signal.

Claims (6)

A plurality of air bags provided on the seat of the vehicle to receive the load of the occupant seated on the seat, and
An internal pressure detection unit that detects the internal pressure of each air bag,
An internal pressure deflection detection unit that detects the deflection of the internal pressure generated between the air bags by comparing the detected values of the internal pressures.
An inclined posture determining unit that determines that the occupant's posture is inclined in the direction in which the deflection occurs,
A occupant detection device equipped with. In the occupant detection device according to claim 1,
It is provided with an internal pressure initial value holding unit that holds the detected value of each internal pressure detected when the seat belt provided on the seat is fastened as the initial value of each internal pressure.
When the detected value of the internal pressure of the air bag located in the direction in which the deflection occurs is higher than the initial value of the internal pressure, the tilted posture determining unit determines the occupant in the direction in which the deflection occurs. An occupant detection device characterized in that it is determined that the posture of the vehicle is tilted. In the occupant detection device according to claim 1 or 2.
An occupant detection device, characterized in that each of the air bags is provided inside a cushion member that is detachably configured with respect to the seat. In the occupant detection device according to any one of claims 1 to 3.
An alarm output unit that executes an alarm output when the door of the vehicle located on the side of the seat is operated in a state where it is determined that the occupant's posture is leaning outward in the vehicle width direction. An occupant detection device characterized by being equipped. The occupant detection device according to any one of claims 1 to 4.
An opening / closing drive device for opening / closing the door of the vehicle located on the side of the seat,
A vehicle door device including an open / close drive prohibition unit for prohibiting open / close drive of the door in a state where it is determined that the occupant's posture is in an outward leaning posture inclined outward in the vehicle width direction. The occupant detection device according to any one of claims 1 to 4.
The air bag for side support that supports the side of the occupant,
A vehicle provided with a support strengthening unit for expanding an air bag for side support located in the tilted direction of the occupant when it is determined that the occupant's posture is tilted in the vehicle width direction. Seat device for.