JPH08318814A - Air bag device for front passenger's seat - Google Patents

Abstract

PURPOSE: To positively develop an air bag bladder when it is under a condition that the air bag bladder is desirably developed. CONSTITUTION: An air bag control circuit 32 is connected to a crew detection sensor 32, a buckle switch 46, an approach detection sensor 56, and to a collision sensor 33, and the air bag control circuit 32 reads out the respective outputs of the crew detection sensor 32, the buckle switch sensor 46 and the approach detection sensor 56, based on the result of judgement made from these readings, and controls the lower limit value of the operated values ΔV of deceleration for operating an air bag device 20, that is, a threshold value ΔVmin , and makes an inflator 30 operate based on the lower limit value ΔVmin .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passenger seat airbag device, and more particularly to a passenger seat airbag device for controlling the deployment of an airbag bag according to the state of an occupant in the passenger seat.

[0002]

2. Description of the Related Art Conventionally, there is a vehicle equipped with a passenger seat airbag device for protecting an occupant seated in the passenger seat in the event of an emergency of a vehicle, an example of which is described in Japanese Patent Laid-Open No. 4-55447.

In this passenger side airbag device, when a sudden deceleration of the vehicle is detected and the detected deceleration exceeds the higher one of the two thresholds, the driver's seat side and the passenger's seat side are detected. Both airbag bags are deployed. Also, when the detected deceleration is less than or equal to the higher threshold value and exceeds the lower threshold value, when there is no passenger in the passenger seat,
The airbag bag on the passenger side is not deployed, and only the airbag bag on the driver side is deployed.

[0004]

However, in this passenger airbag device, when a rear-facing child seat (CRS) is present on the passenger seat, or an occupant seated in the passenger seat wears a seat belt. The deployment of the airbag bag body on the passenger side is not controlled depending on the situation.

In view of the above facts, an object of the present invention is to obtain an airbag device for a passenger seat, which can surely deploy an airbag bag when it is desired to deploy the airbag bag.

[0006]

According to a first aspect of the present invention, there is provided an air bag device for a passenger seat, which is a deceleration detecting means for detecting a deceleration of a vehicle, and an occupant seated in the passenger seat. An occupant presence detection means, an approach state detection means for detecting an occupant's instrument panel approaching state, a seatbelt wearing detection means for detecting wearing of a passenger seatbelt, and a detection result of the occupant presence detection means and the The deployment threshold of the airbag bag is changed according to the detection result of the approach state detection means and the detection result of the seat belt wearing detection means, and the airbag is detected when the detection value of the deceleration detection means exceeds the deployment threshold. And a deployment control device for deploying the bag body.

According to a second aspect of the present invention, there is provided an air bag device for a passenger seat, comprising deceleration detecting means for detecting deceleration of a vehicle, and seat belt wearing detection means for detecting wearing of a seat belt of a passenger seat. A manual changeover switch for selecting an airbag bag deployment mode, a detection result of the seatbelt wearing detection means, and an airbag bag deployment threshold value according to the mode of the manual switching switch, and the deceleration A deployment control device for deploying the airbag bag when the detection value of the detection means exceeds the deployment threshold value.

According to a third aspect of the present invention, there is provided an air bag device for a passenger seat, comprising deceleration detecting means for detecting deceleration of a vehicle, and seat belt wearing detection means for detecting wearing of a seat belt of a passenger seat. A manual changeover switch for selecting an airbag bag deployment mode, an approaching state detection means for detecting an occupant's instrument panel approaching state, a detection result of the seat belt wearing detection means, and a mode of the manual changeover switch. A deployment control device that changes the deployment threshold of the airbag bag according to the detection result of the approaching state detection means and deploys the airbag bag when the detection value of the deceleration detection means exceeds the deployment threshold. It is characterized by having and.

According to a fourth aspect of the present invention, there is provided an air bag device for a passenger seat, comprising deceleration detecting means for detecting deceleration of a vehicle, and seat belt wearing detection means for detecting wearing of a seat belt of a passenger seat. A manual changeover switch for selecting an airbag bag deployment mode, an occupant presence detection means for detecting an occupant seated in a passenger seat, a detection result of the seatbelt wearing detection means, and a mode of the manual changeover switch. And a deployment control that deploys the airbag bag when the deployment threshold of the airbag bag is changed according to the detection result of the occupant presence / absence detection means and the detection value of the deceleration detection means exceeds the deployment threshold. And a device.

A passenger seat airbag system according to a fifth aspect of the present invention is the passenger seat airbag system according to any one of the first to fourth aspects, which detects wearing of a driver's seat belt. When the driver seat belt wearing detection means detects that the driver seat belt is in a worn state, the deployment control device detects that the driver seat belt is not in a worn state. It is characterized in that the expansion threshold value is increased as compared with the case.

[0011]

In the airbag apparatus for a passenger seat according to the present invention as set forth in claim 1, in the deployment control device, from the detection result of the occupant presence detection means, the detection result of the approach state detection means, and the detection result of the seat belt wearing detection means, For example, when it is determined that the passenger on the passenger seat is approaching the airbag device, the deployment threshold of the airbag bag is increased and the detection value of the deceleration detection means exceeds the deployment threshold. If necessary, deploy the airbag bag. Further, when it is determined that there is a rear-facing child seat on the passenger seat, the deployment threshold of the airbag bag is further increased so that the detection value of the deceleration detection means does not exceed this deployment threshold. Prohibit the expansion of the bag.

In the airbag apparatus for a passenger seat according to a second aspect of the present invention, in the deployment control device, for example, a rearward facing child seat on the passenger seat is selected from the detection result of the seat belt wearing detection means and the mode of the manual changeover switch. When it is determined that the airbag bag body is inflated, the deployment threshold value of the airbag bag body is further increased, and the deployment value of the airbag bag body is prohibited so that the detection value of the deceleration detecting means does not exceed the deployment threshold value.

In the airbag apparatus for a passenger seat according to a third aspect of the present invention, in the deployment control device, from the detection result of the seat belt wearing detection means, the mode of the manual changeover switch and the detection result of the approach state detection means, for example, If it is determined that there is a rear-facing child seat on the front passenger seat, the expansion threshold of the airbag bag is further increased regardless of the mode of the manual changeover switch, and the detection value of the deceleration detection means sets the expansion threshold to this value. Do not exceed it and prohibit the airbag bag from expanding.

According to a fourth aspect of the present invention, in the passenger seat airbag apparatus, the detection result of the seatbelt wearing detection means,
From the detection result of the mode of the manual changeover switch and the occupant presence detection means, for example, when there is a rear-facing child seat on the passenger seat, the deployment threshold of the airbag bag is further increased by selecting the mode of the manual changeover switch, The expansion of the airbag bag is prohibited by preventing the detection value of the deceleration detecting means from exceeding the expansion threshold value.

According to a fifth aspect of the present invention, in the passenger seat airbag apparatus, when the deployment control device detects that the driver seat belt is in a worn state, The deployment threshold value is increased as compared to when the driver's seat belt is not worn. As a result, when the driver does not wear the seat belt, the airbag bag of the passenger airbag device deploys at a small deceleration.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the passenger seat airbag apparatus of the present invention will be described with reference to FIG.

In the figure, an arrow FR indicates a vehicle front direction, and an arrow UP indicates a vehicle upward direction. As shown in FIG. 1, a passenger seat 14 on which a passenger is seated is mounted on a floor surface 12 of a vehicle 10.
However, it is attached via a pair of left and right rails (not shown) that are installed parallel to the vehicle front-rear direction. As a result, the passenger seat 14 can move relative to the floor surface 12 in the vehicle front-rear direction. A windshield glass 16 is provided above the vehicle front side of the passenger seat 14. The windshield glass 16 has a rear end connected to the roof 17 and a front end connected to a bonnet (not shown). An instrument panel 18 is installed in front of the passenger seat 14 between the floor surface 12 and the windshield glass 16. The instrument panel 18 is made of synthetic resin and has a substantially U-shaped cross section, and the opening of the substantially U-shaped cross section is arranged so as to face the front of the vehicle.

An air bag device 20 is installed inside the instrument panel 18. Airbag device 2
The No. 0 airbag case 28 has a substantially U-shaped cross section, and is arranged such that the opening of the substantially U-shaped cross section faces the rear upper side of the vehicle. An inflator 30 is arranged at the bottom of the airbag case 28, and an airbag bag body 31 is accommodated in a folded state near the opening of the airbag case 28. The airbag bag body 31 is inflated when the inflator 30 generates gas, and the occupant 34 seated on the passenger seat 14 through the opening of the instrument panel 18.
The head is developed in the direction of the head 34A.

The inflator 3 in the airbag case 28
Reference numeral 0 is connected to an airbag control circuit 32 as a deployment control device including a microcomputer. The airbag control circuit 32 has deceleration detecting means for detecting deceleration acting on the vehicle. The collision sensor 33 of is connected.

A sensor box 40 is provided in a portion of the ceiling 36 of the passenger compartment facing the instrument panel 18 and the seat back 14A of the passenger seat 14, specifically, in the vicinity of the vehicle front side portion of the inner mirror 38. It is provided. An occupant detection sensor 42 as an occupant presence / absence detecting unit including an ultrasonic sensor is provided below the sensor box 40.
The occupant detection sensor 42 is connected to the airbag control circuit 32. The occupant detection sensor 42 is provided downward and includes a transmission / reception sensor (not shown), and its detection area A is at the position of the leg 34B of the occupant 34 seated in the passenger seat 14. That is, the occupant detection sensor 42 detects the distance between the seat cushion 14B of the passenger seat 14 and the leg 34B of the occupant 34, and based on this, the airbag control circuit 32 determines whether or not the occupant 34 is seated. Is designed to The determination distance is L1, and when the detection distance X is L1 or less, it is determined that the occupant 34 is seated.

Inside the seat belt buckle 45 into which the tongue 44A of the seat belt 44 is inserted, a buckle switch 46 as seat belt wearing detection means is provided. The buckle switch 46 is connected to the airbag control circuit 32. When the tongue 44A is inserted into the seat belt buckle 45, the buckle switch 46 is turned on so that the ON signal is input to the airbag control circuit 32. It has become.

The upper surface 18A of the instrument panel 18
A sensor box 54 is disposed near the front end of the. In the sensor box 54, an approach detection sensor 56 as an approach state detection unit including an ultrasonic sensor is provided, and the approach detection sensor 56 is connected to the airbag control circuit 32. The approach detection sensor 56 is provided toward the rear of the vehicle and is a transmission / reception sensor (not shown).
The lower end of the detection area B is located at a position separated from the upper surface 18A of the instrument panel 18 by a predetermined distance L2 upward.

That is, the approach detection sensor 56 does not detect the hand 34C of the occupant 34 extended to the instrument panel 18, is placed on the seat cushion 14B of the passenger seat 14, and is fixed by the seat belt 44. The distance to the approach detection sensor 56 of the rearward-facing child seat (CRS) 58 or the distance to the head 34A of the occupant 34 in the state of approaching the airbag device 20 (state of the imaginary line in FIG. 1) is detected. It has become. Further, based on this distance, the airbag control circuit 32 determines whether the CRS 58 or the head 34A of the occupant 34 is near the airbag device 20.

Next, the operation of the first embodiment will be described. In the passenger airbag device of the first embodiment, the airbag control circuit 32 reads whether the buckle switch 46 is on or off. At this time, if the tongue 44A of the seat belt 44 is inserted into the seat belt buckle 45, the ON signal is read into the airbag control circuit 32.

Further, the airbag control circuit 32 reads the output of the occupant detection sensor 42. At this time, when the occupant 34 is seated on the seat cushion 14B of the passenger seat 14 as shown by the solid line in FIG.
The distance X to the leg 34B of the occupant 34 is output to the airbag control circuit 32. The airbag control circuit 32 determines whether or not the detected distance X is less than or equal to the determination distance L1, and when the detected distance X is less than or equal to the determination distance L1, the occupant detection sensor is turned on (the occupant on the seat cushion 14B of the passenger seat 14 is 34
Is seated).

Further, the airbag control circuit 32 reads the output of the approach detection sensor 44. At this time, if there is the head 34A or the CRS 58 of the occupant 34 near the airbag device 20, the approach detection sensor 44 causes the head 34A of the occupant 34 to move.
Alternatively, the distance Y to the CRS 58 is set to the airbag control circuit 32.
Output to. In the airbag control circuit 32, the detection distance Y
Is less than or equal to a predetermined determination distance, and the detection distance Y
Is less than or equal to a predetermined determination distance, the approach detection sensor 44 is turned on (the head 3 of the occupant 34 near the airbag device 20)
4A or CRS 58).

Based on these determination results, the airbag
The control circuit 32, as shown in Table 1, is an airbag device.
The lower limit value of the deceleration calculation value ΔV at which 20 operates, that is, the threshold value
ΔV _minThe lower limit value ΔV_minBased on
The flatter 30 is operated.

[0028]

[Table 1]

As shown in Table 1, the occupant detection sensor 42
Is on and the approach detection sensor 56 is off, the buckle switch 46 is off, that is, the occupant 34 is seated in the passenger seat 14 in the normal state (state shown by the solid line in FIG. 1), and the seat belt When 44 is not attached, the airbag control circuit 32 sets the threshold value ΔV _min to ΔV ₁ .

On the other hand, when the buckle switch 64 is on, that is, when the passenger 34 is seated in the passenger seat 14 in the normal state (state shown by the solid line in FIG. 1) and the seat belt 44 is worn, Threshold value ΔV _min is greater than ΔV ₁ ΔV
_{Assume 2} .

Therefore, when the occupant 34 is not wearing the seat belt 44, the airbag bag 31 can be deployed with a lower impact than when the occupant 34 is wearing the seat belt 44.

When the occupant detection sensor 42 is on, the buckle switch 46 is off, and the approach detection sensor 56 is on, that is, the head 34A of the occupant 34 is near the airbag device 20 (see FIG. 1). If the seat belt 44 is not worn in the phantom line), the threshold value ΔV _min
Is ΔV ₃ which is ΔV ₂ or more.

Therefore, when the head 34A of the occupant 34 is near the airbag device 20, the airbag bag 31 can be prevented from being deployed except for a severe collision.

When the occupant detection sensor 42 is turned on, the approach detection sensor 56 is turned on, and the buckle switch 46 is turned on, C is placed on the seat cushion 14B of the passenger seat 14.
It is determined that the RS 58 is placed and fixed by the seat belt 44, and the operation of the inflator 30 is prohibited. Therefore, the CRS is placed on the seat cushion 14B of the passenger seat 14.
When 58 is placed and fixed by the seat belt 44, the airbag bag 31 can be prevented from being deployed.

When the occupant detection sensor 42 is off, it is determined that the occupant 34 is not on the passenger seat 14, and the threshold value ΔV _{min is set} to ΔV ₃ which is ΔV ₂ or more. Therefore, even when the passenger 34 is not on the passenger seat 14, the airbag bag body 31 on the passenger seat 14 side is deployed in a severe collision, so that the driver moves largely toward the passenger seat 14, or
When the passenger in the rear seat moves forward, the driver and the passenger in the rear seat can be protected.

Next, a second embodiment of the passenger airbag device according to the present invention will be described with reference to FIGS.

The same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 3, in the passenger airbag apparatus of the second embodiment, the instrument panel 18 is used.
A manual changeover switch 60 is provided on the operation surface 18B of (1) so that the driver can operate it.

As shown in FIG. 4, a standard mode switch 62 and a release mode switch 64 are provided on the operation surface 60A of the manual selector switch 60 for switching the modes of the passenger airbag system. . Further, an indicator 66 is provided on the operation surface 60A, and the indicator 66 is lit when the airbag apparatus 20 in the passenger seat is in the operation prohibited state.

As shown in FIG. 2, the manual changeover switch 60 is connected to the airbag control circuit 32.

Next, the operation of the second embodiment will be described. In the passenger seat airbag apparatus of the second embodiment, when the passenger is not in the passenger seat 14, the driver manually switches the switch 6
When the 0 release mode switch 64 is pressed, the standard mode switch 62 is reset. At this time, if the buckle switch 46 is turned on, the indicator 66 lights up, indicating that the airbag apparatus 20 in the passenger seat is in the operation prohibited state.

On the other hand, when the driver presses the standard mode switch 62 of the manual changeover switch 60, the release mode switch 64 is reset and the indicator 66 is turned off.

In the airbag control circuit 32, a table is displayed based on the judgment result of the approach detection sensor 44, the standard mode switch 62 being turned on and off, the release mode switch 64 being turned on and off, the buckle switch 46 being turned on and off. As shown in 2, the lower limit value of the calculated value ΔV of the deceleration at which the airbag device 20 operates, that is, the threshold value ΔV _min is controlled, and the inflator 30 is operated based on the lower limit value ΔV _min .

[0044]

[Table 2]

As shown in Table 2, the approach detection sensor 5
When 6 is off and the manual selector switch 60 is in the standard mode, the buckle switch 46 is off, that is, the passenger seat 1
4 when the occupant 34 does not wear the seat belt 44, the lower limit value ΔV of the calculated value ΔV of deceleration acting on the vehicle.
_{Let min} be ΔV ₁ .

On the other hand, when the proximity detection sensor 56 is off, the manual changeover switch 60 is in the standard mode, and the buckle switch 46 is on, that is, the passenger 34 is seated in the passenger seat 14 in a normal state, When 44 is attached, the lower limit value ΔV _min of the calculated value ΔV of deceleration acting on the vehicle is set to ΔV _{2 which} is larger than ΔV ₁ .

Therefore, when the occupant 34 is not wearing the seat belt 44, the airbag bag 31 can be deployed with a lower impact than when the occupant 34 is wearing the seat belt 44.

When the buckle switch 46 is off, the approach detection sensor 56 is off, and the manual changeover switch 60 is in the release mode, the calculated value Δ of the deceleration acting on the vehicle.
The lower limit value ΔV _min of V is set to ΔV ₃ which is equal to or larger than ΔV ₂ .

Therefore, in the event of a severe collision, the passenger seat 14
Since the airbag 31 on the side is deployed, it is possible to protect the driver and the occupant in the rear seat when the driver moves largely toward the passenger seat 14 or when the occupant in the rear seat moves forward. it can.

When the buckle switch 46 is off and the approach detection sensor 56 is on, that is, the head 34A of the occupant 34 is near the airbag device 20 (see FIG. 2).
When the seat belt 44 is not worn, the lower limit value ΔV _min of the acceleration ΔV acting on the vehicle is ΔV ₃ which is ΔV ₂ or more regardless of whether the manual changeover switch 60 is on or off. And

Therefore, when the head portion 34A of the occupant 34 is near the airbag device 20, the airbag bag 31 can be prevented from being deployed except for a severe collision.

When the buckle switch 46 is on and the approach detection sensor 56 is on, it is determined that the CRS 58 is placed on the seat cushion 14B of the passenger seat 14 and is fixed by the seat belt 44, Inflator 3
The operation of 0 is prohibited and the indicator 66 is turned on.

Therefore, when the CRS 58 is placed on the seat cushion 14B of the passenger seat 14 and fixed by the seat belt 44, the airbag bag 31 can be prevented from being deployed. The occupant turns on the indicator 66 to turn on the airbag device 2 on the passenger side.
It can be confirmed that 0 is not in operation.

Further, in the passenger airbag apparatus of the second embodiment, the manual selector switch 60 is used in place of the passenger detection sensor 42 of the passenger airbag apparatus of the first embodiment, so that Can be cheap.

In the second embodiment, the approach detecting sensor 56 may be omitted.

In this case, in the airbag control circuit 32, as shown in Table 3, based on the on / off state of the buckle switch 46 and the state of the manual changeover switch 60,
The lower limit value of the calculated value ΔV of the deceleration at which the airbag device 20 operates, that is, the threshold value ΔV _min is controlled, and the lower limit value ΔV _min is controlled.
The inflator 30 is operated based on

[0057]

[Table 3]

As shown in Table 3, the buckle switch 4
When 6 is on and the manual selector switch 60 is in the release mode, the CR is placed on the seat cushion 14B of the passenger seat 14.
In S58, it is determined that the seat belt 44 is fixed and the inflator 30 is prohibited from operating, and the indicator 66 is turned on.

Therefore, when the CRS 58 is placed on the seat cushion 14B of the passenger seat 14 and is fixed by the seat belt 44, the airbag bag 31 can be prevented from being deployed. Further, the occupant can confirm that the airbag device 20 on the passenger side is not in the operating state by turning on the indicator 66.

Further, the manual changeover switch 60 is set in the release mode.
However, if the buckle switch 46 is off,
Lower limit value ΔV of the calculated value ΔV of deceleration acting on the vehicle_minBut
ΔV ₃In a severe collision, the inflator 30
Since the airbag bag 31 is activated and the airbag bag 31 is deployed, the airbag
The protective effect of the bag body 31 can be obtained.

Next, a third embodiment of the passenger seat airbag apparatus of the present invention will be described with reference to FIG.

The same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 5, in the passenger airbag apparatus of the third embodiment, a manual changeover switch is provided on the operation surface 18B of the instrument panel 18 instead of the approach detection sensor 56 of the first embodiment. 60 is provided so that the driver can operate it.

Next, the operation of the third embodiment will be described. In the passenger airbag device of the third embodiment, when the driver operates the manual changeover switch 60, the airbag control circuit 3
In 2, the on / off of the standard mode switch 62 and the on / off of the release mode switch 64 are read.

Based on this, on / off of the buckle switch 46, and the determination result of the occupant detection sensor 42, the airbag control circuit 32, as shown in Table 4, decelerates the airbag device 20 to operate. The lower limit value of the calculated value ΔV, that is, the threshold value ΔV _min is controlled, and the inflator 30 is operated based on the lower limit value ΔV _min .

[0066]

[Table 4]

As shown in Table 4, the occupant detection sensor 42
Is on and the buckle switch 46 is off, that is, the passenger 34 is seated in the passenger seat 14, and the seat belt 44
When the is not attached, the threshold value ΔV _{min is set} to ΔV ₁ .

On the other hand, when the buckle switch 46 is on and the changeover switch 60 is in the standard mode, the threshold value ΔV
_{Make min} ΔV ₂ larger than ΔV ₁ . When the occupant detection sensor 42 is turned on, the buckle switch 46 is turned on, and the CRS 58 is placed on the seat cushion 14B of the passenger seat 14, the changeover switch 60 is set to the release mode to operate the inflator 30. Prohibit and light the indicator 66.

Therefore, when the CRS 58 is placed on the seat cushion 14B of the passenger seat 14 and is fixed by the seat belt 44, the airbag bag 31 can be prevented from expanding. Further, the occupant can confirm that the airbag device 20 on the passenger side is not in the operating state by turning on the indicator 66.

When the occupant detection sensor 42 is off, the occupant 3 is placed on the passenger seat 14 regardless of the modes of the buckle switch 46 on / off and the manual changeover switch 60.
4 is not present or CRS58 is not present, the threshold Δ
Let V _{min be} ΔV ₃ which is equal to or greater than ΔV ₂ .

Therefore, at the time of a severe collision, the inflator 30 is actuated and the air bag body 31 is deployed,
The protective effect of the airbag bag body 31 can be obtained.

In the second to fourth embodiments described above, a buckle switch may be provided in the driver's seat as the seatbelt wearing detection means for detecting the wearing of the seatbelt.

In this case, under the conditions indicated by * in Tables 2, 3 and 4, when it is detected by the buckle switch in the driver's seat that the seatbelt in the driver's seat is in a worn state. In the airbag control circuit 32,
The threshold value ΔV _{min is set} to ΔV _{2 which} is larger than ΔV ₁ when it is detected that the seat belt of the driver's seat is not worn.

As a result, when the driver is not wearing the seat belt, the airbag bag body of the airbag device on the passenger side deploys with a small impact, so that the driver's protective performance is improved.

[0075]

According to the airbag device for a passenger seat according to the present invention, the deceleration detecting means for detecting the deceleration of the vehicle and the occupant presence detection for detecting the occupant seated in the passenger seat. Means, an approach state detection means for detecting the approach state of the occupant's instrument panel, a seat belt wearing detection means for detecting the wearing of the seat belt of the passenger seat, a detection result of the occupant presence detection means, and a detection of the approach state detection means A deployment control device that changes the deployment threshold value of the airbag bag according to the result and the detection result of the seatbelt wearing detection means, and deploys the airbag bag body when the detection value of the deceleration detection means exceeds the deployment threshold value. Since it is configured to have the above configuration, there is an excellent effect that the airbag bag can be surely deployed when it is desired to deploy the airbag bag.

According to a second aspect of the present invention, there is provided a passenger seat airbag apparatus comprising deceleration detecting means for detecting deceleration of a vehicle, and seatbelt wearing detecting means for detecting wearing of a seatbelt in the passenger seat. , A manual changeover switch for selecting the airbag bag deployment mode and the detection value of the deceleration detection means by changing the airbag bag deployment threshold according to the detection result of the seat belt wearing detection means and the mode of the manual switching switch. And a deployment control device that deploys the airbag bag when the deployment threshold exceeds the deployment threshold. Therefore, in addition to the effect described in claim 1, there is an excellent effect that the device becomes inexpensive.

According to a third aspect of the present invention, there is provided an air bag device for a passenger seat, comprising deceleration detecting means for detecting deceleration of a vehicle, and seat belt wearing detection means for detecting wearing of a seat belt of a passenger seat. , A manual changeover switch for selecting the airbag bag deployment mode, an approach state detection means for detecting an approach state of an occupant's instrument panel, a detection result of a seatbelt wearing detection means, a mode of the manual changeover switch, and an approaching state. A deployment control device that changes the deployment threshold value of the airbag bag according to the detection result of the state detection means and deploys the airbag bag body when the detection value of the deceleration detection means exceeds the deployment threshold value. Therefore, even if the mode change of the manual changeover switch is wrong, it is possible to confirm when it is desirable to deploy the airbag bag according to the detection result of the approach state detection means. It has an excellent effect that it is possible to deploy the air bag body into.

According to a fourth aspect of the present invention, there is provided an air bag device for a passenger seat, comprising deceleration detecting means for detecting deceleration of a vehicle, and seat belt wearing detection means for detecting wearing of a seat belt of a passenger seat. , A manual changeover switch for selecting an airbag bag deployment mode, an occupant presence detection means for detecting an occupant seated in a passenger seat, a detection result of a seatbelt wearing detection means, and a mode of a manual changeover switch, A deployment control device for changing the deployment threshold value of the airbag bag according to the detection result of the occupant presence detection means and deploying the airbag bag body when the detection value of the deceleration detection means exceeds the deployment threshold value. Since the configuration is adopted, in addition to the effect described in claim 1, there is an excellent effect that the device becomes inexpensive.

According to a fifth aspect of the present invention, in the passenger seat airbag apparatus according to the first to fourth aspects, a driver seat seat belt wearing detection means for detecting wearing of a seat belt of a driver seat is provided, and a driver seat seat. When the belt wearing detection means detects that the driver's seat seat belt is in the worn state, the deployment control device sets the deployment threshold value larger than when the driver's seat belt is not found in the worn state. Therefore, in addition to the effect described in claim 1, there is an excellent effect that the protection performance of the driver is improved.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a passenger seat airbag apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic side view showing a passenger seat airbag apparatus according to a second embodiment of the present invention.

FIG. 3 is a front view showing an instrument panel of a vehicle to which a passenger seat airbag device according to a second embodiment of the present invention is applied.

FIG. 4 is a perspective view showing a manual changeover switch of a passenger seat airbag apparatus according to a second embodiment of the present invention.

FIG. 5 is a schematic side view showing a passenger seat airbag apparatus according to a third embodiment of the present invention.

[Explanation of symbols]

14 passenger seat 18 instrument panel 20 airbag device 30 inflator 31 airbag bag body 32 airbag control circuit (deployment control device) 33 collision sensor (deceleration detection means) 34 occupant 42 occupant detection sensor (occupant presence / absence detection means) 44 Seat belt 46 Buckle switch (seat belt wearing detection means) 56 Approach detection sensor (approach state detection means) 58 Rearward facing child seat (CRS) 60 Manual changeover switch 62 Standard mode switch 64 Release mode switch 66 Indicator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Jiro Tsuchiya 1 Toyota Town, Toyota City, Aichi Prefecture, Toyota Motor Co., Ltd. (72) Inventor Tomoji Maeda 1 Toyota Town, Toyota City, Aichi Prefecture, Toyota Motor Co., Ltd.

Claims (5)

[Claims] 1. A deceleration detecting means for detecting a deceleration of a vehicle, an occupant presence detecting means for detecting an occupant seated in a passenger seat, and an approach state detecting for detecting an approach state of an instrument panel of the occupant. Means, a seatbelt wearing detection means for detecting wearing of a seatbelt in the front passenger seat, a detection result of the occupant presence detection means, a detection result of the approaching state detection means, and a detection result of the seatbelt wearing detection means A front passenger seat, comprising: a deployment control device that changes a deployment threshold value of the airbag bag and deploys the airbag bag body when a detection value of the deceleration detecting means exceeds the deployment threshold value. Airbag device. 2. A deceleration detecting means for detecting a deceleration of a vehicle, a seat belt wearing detection means for detecting wearing of a seat belt of a passenger seat, and a manual changeover switch for selecting an airbag bag deployment mode. A detection result of the seatbelt wearing detection means and a deployment threshold of the airbag bag according to the mode of the manual changeover switch, and when the detection value of the deceleration detection means exceeds the deployment threshold, An airbag device for a front passenger seat, comprising: a deployment control device for deploying an airbag bag. 3. A deceleration detecting means for detecting a deceleration of a vehicle, a seat belt wearing detection means for detecting wearing of a seat belt of a passenger seat, and a manual changeover switch for selecting an airbag bag deployment mode. An approach state detecting means for detecting an approach state of an occupant's instrument panel; a detection result of the seat belt wearing detection means; a mode of the manual changeover switch; and an airbag according to a detection result of the approach state detecting means. A deployment control device for changing the deployment threshold value of the bag body and deploying the airbag bag body when the detection value of the deceleration detection means exceeds the deployment threshold value. Bag device. 4. A deceleration detecting means for detecting a deceleration of a vehicle, a seat belt wearing detection means for detecting wearing of a passenger seat belt, and a manual changeover switch for selecting a deployment mode of an airbag bag. An occupant presence detecting means for detecting an occupant seated in the passenger seat, a detection result of the seatbelt wearing detection means, a mode of the manual changeover switch, and an air depending on the detection result of the occupant presence detecting means. A deployment control device for changing the deployment threshold of the bag bag and deploying the airbag bag when the detection value of the deceleration detection means exceeds the deployment threshold, for a passenger seat Airbag device. 5. A driver seat seat belt wearing detection means for detecting wearing of a driver's seat seat belt is provided, and when the driver seat seat belt wearing detection means detects that the driver seat seat belt is in a worn state. 5. The airbag apparatus for a passenger seat according to claim 1, wherein the deployment control device sets the deployment threshold value larger than when the deployment seat belt is detected not to be worn.