JP2000313305A - Satelite sensor fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a satellite sensor fixing structure which can properly detect collision. SOLUTION: In a satellite sensor fixing structure for securing a satellite sensor of an air bag device to a front side member of a vehicle through a bracket, a bracket 50 includes a satellite sensor installing part 50a for installing satellite sensors 30A and 30B, fixing parts 50b to be fixed to the front side member, and connecting parts 50c standing up from the fixing parts 50b for connecting the sensor installing part 50a to the fixing parts 50b, in which the connecting parts 50c are formed in such a manner that the width on the side of the fixing parts 50b is smaller than that on the side of the sensor installing part 50a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite sensor mounting structure for an airbag device for protecting an occupant in the event of a vehicle collision.

[0002]

2. Description of the Related Art Conventionally, an airbag device is mounted on a vehicle to protect an occupant in the event of a vehicle collision. This airbag device includes a satellite sensor at the front of the front side member to detect the deceleration due to the offset collision at an early stage (see Japanese Patent Application Laid-Open No. 5-112195).

[0003]

However, this satellite sensor detects a collision when a rear portion of the satellite sensor of the front side member is deformed by a vehicle collision and a large acceleration acts on the satellite sensor. Therefore, when the collision target is soft, it is difficult to detect the collision at an early stage.

It is an object of the present invention to provide a satellite sensor mounting structure for an airbag device which can accurately detect a collision.

[0005]

According to a first aspect of the present invention, there is provided a satellite sensor mounting structure for fixing a satellite sensor of an airbag device to a front side member of a vehicle via a bracket. A sensor installation portion for installing the satellite sensor, a fixing portion for fixing to the front side member, and a connection portion that rises from the fixing portion and connects the sensor installation portion and the fixing portion, wherein the connection portion is The width of the fixed part side is smaller than the width of the sensor installation part side.

A satellite sensor mounting structure according to a second aspect of the present invention is a satellite sensor mounting structure for fixing a satellite sensor of an airbag device to a front side member of a vehicle via a bracket, wherein the bracket mounts the satellite sensor. A sensor installation section to be installed,
A fixing portion fixed to the front side member, and a connecting portion rising from the fixing portion and connecting the sensor installation portion and the fixing portion, wherein the connecting portion has a waveform shape. I do.

According to a third aspect of the present invention, there is provided a satellite sensor mounting structure for fixing a satellite sensor of an airbag device to a front side member of a vehicle via a bracket, wherein the bracket mounts the satellite sensor. A sensor installation section to be installed,
A fixing portion fixed to the front side member, and a connecting portion rising from the fixing portion and connecting the sensor installation portion and the fixing portion, wherein the connecting portion has an elongated hole extending in a direction intersecting the rising direction. It is characterized by having.

According to the satellite sensor mounting structure of the first to third aspects, the connecting portion of the bracket is formed to be narrower on the fixed portion side than on the sensor mounting portion side. When the vehicle collides, the headlamp housing and the like disposed at the front of the vehicle retreat, and the bracket is deformed to press the front surface of the satellite sensor, so that a large acceleration acts on the satellite sensor. Therefore, even if the collision target is soft, the collision of the vehicle can be detected early.

According to a fourth aspect of the present invention, there is provided a satellite sensor mounting structure for fixing a satellite sensor of an airbag device to a front side member of a vehicle via a bracket, wherein the bracket mounts the satellite sensor. A first bracket to be installed; and a second bracket having a sliding surface on which the first bracket is slidably mounted in the front-rear direction of the vehicle and having a fixing portion fixed to the front side member. I do.

According to a fifth aspect of the present invention, there is provided a satellite sensor mounting structure for fixing a satellite sensor of an airbag device to a front side member of a vehicle via a bracket, wherein the front side member includes the bracket. A sliding guide portion for slidably holding the bracket in the front-rear direction of the vehicle, and a sliding limiting means for limiting sliding of the bracket.

According to the satellite sensor mounting structure of the present invention, since the bracket is slidably mounted in the front-rear direction of the vehicle, the bracket is disposed at the front of the vehicle when the vehicle collides. The headlamp housing or the like retreats and the bracket slides rearward on the vehicle to press the front surface of the satellite sensor, and a large acceleration acts on the satellite sensor. Therefore, even if the collision target is soft, the collision of the vehicle can be detected early.

[0012]

The first embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the control device 2 of the airbag device includes an airbag device 3
6, which mainly includes a control circuit 20, satellite sensors 30A and 30B, a floor sensor 32, and a drive circuit.

The satellite sensors 30A and 30A
B is provided at the front of the vehicle, and is a mechanical sensor for detecting whether or not an impact equal to or more than a predetermined reference value is applied to the vehicle. When a deceleration equal to or greater than a predetermined reference value is applied, an internal switch is turned on to output an ON signal. In addition, the floor sensor 32
Is a so-called acceleration sensor for measuring the impact applied to the vehicle and transmitted through the vehicle body. Specifically, it measures the deceleration applied to the vehicle in the front-rear direction as needed, and sends the measured value to a signal. Output as

The control circuit 20 includes a central processing unit (CPU)
22, an input / output circuit (I / O circuit) 24, a read only memory (ROM) 26, a random access memory 28, and the like, and each component is connected by a bus. Among them, the CPU 22 performs various processes of the operation control of the airbag device 36 according to a program or the like stored in the ROM 26. The RAM 28 stores data obtained from signals from the satellite sensors 30A and 30B and the floor sensor 32 and the CPU 22 based on the data.
Is a memory for storing the results of the calculations. Further, the I / O circuit 24 includes a satellite sensor 30A,
30B, a circuit for inputting a signal from the floor sensor 32, outputting an operation signal to the drive circuit 34, and the like.

The drive circuit 34 is a circuit for energizing and igniting a squib 38 of an inflator in the airbag device 36 according to an operation signal from the control circuit 20.

Further, the airbag device 36 includes a squib 38 as an ignition device, a gas generating agent (not shown) ignited by the squib 38, a bag (not shown) which is inflated by the generated gas, and the like. Have.

Of these components, the control circuit 20, the floor sensor 32 and the drive circuit 34 correspond to the ECU shown in FIG.
(Electronic control unit) 44, which is mounted on a floor tunnel substantially in the center of the vehicle 46. Further, as shown in FIG. 3, the satellite sensor 30A
With respect to the floor sensor 32 in the U44, a bracket 50 is provided on the front side member 48 obliquely to the front right and the satellite sensor 30B is mounted on the front side member 48 obliquely front left to the floor sensor 32. 50 are provided. The front side member 48 is a rectangular tubular member extending in the front-rear direction of the vehicle 46, and is formed so as to be easily axially compressed in order to absorb a shock at the time of a collision.

FIG. 4 shows satellite sensors 30A and 30B.
And a perspective view of the bracket 50. This bracket 5
Reference numeral 0 denotes a sensor installation portion 50a for installing the satellite sensors 30A and 30B, a fixing portion 50b for fixing to the front side member 48, and a connection for vertically rising from the fixing portion 50b and connecting the sensor installation portion 50a and the fixing portion 50b. It has a part 50c.

The bottom surfaces of the satellite sensors 30A and 30B are fixed to the sensor installation portion 50a by welding.
The satellite sensors 30A and 30B are connected to the control circuit 20 via connectors and wiring. Fixed part 5
0b is provided with a bolt hole 50d, and is fixed on the front side member 48 by a bolt 52 (see FIG. 5) through the bolt hole 50d. The connecting portion 50c is formed so that the width on the fixed portion 50b side is smaller than the width on the sensor installation portion 50a side, and a reinforcing plate 50e extending in a direction perpendicular to the rising direction of the connecting portion 50c is attached by welding.

FIG. 5 is a diagram for explaining a state in which the vehicle 46 has collided. When the vehicle 46 collides, the headlamp housing (or radiator support) 54 disposed at the front of the vehicle 46 retreats, and the satellite sensor 3
The front surfaces of 0A and 30B are pressed toward the rear of the vehicle. As a result, the bracket 50 is deformed (indicated by a dashed line in FIG. 5), the relative displacement between the satellite sensors 30A, 30B and the vehicle body increases, and a large acceleration acts on the satellite sensors 30A, 30B. Here, the connection portion 50c is formed so that the width on the fixed portion 50b side is smaller than the width on the sensor installation portion 50a side, so that the satellite sensor 30 can be easily formed.
A, 30B and the vehicle body generate relative displacement.

Therefore, even when the collision object is soft, the collision can be detected early, that is, before the front side member 48 is axially compressed. When a collision is detected, the satellite sensor 30A or 30B outputs an ON signal and is input to the control circuit 20 via the I / O circuit 24. The control circuit 20 includes the satellite sensors 30A and 30A.
In response to the input of the ON signal input from B, the threshold value to be compared with the output value of the floor sensor 32 to make a collision determination is reduced.

Next, a satellite sensor mounting structure of an airbag device according to a second embodiment of the present invention will be described. The satellite sensor mounting structure according to the second embodiment is obtained by changing the bracket 50 of the satellite sensor mounting structure according to the first embodiment to a bracket 60.

As shown in FIG. 6, the bracket 60 includes a sensor installation part 60a for installing the satellite sensors 30A and 30B, a fixing part 60b for fixing to the front side member 48, and a sensor installation part which rises vertically from the fixing part 60b. Connecting part 60c for connecting the part 60a and the fixed part 60b
Having. Here, the connecting portion 60c has a wavy shape as a whole.

Even when the bracket 60 is used, when the vehicle 46 collides, the headlamp housing (or radiator support) 54 disposed at the front of the vehicle 46 is retracted, and the front of the satellite sensors 30A, 30B is moved to the front. Press backward. This allows the bracket 6
0 is deformed, the relative displacement between the satellite sensors 30A, 30B and the vehicle body increases, and the satellite sensors 30A, 30B
A large acceleration acts on B. Here, the connection portion 60c
Since the whole has a waveform shape, relative displacement between the satellite sensors 30A and 30B and the vehicle body easily occurs.
Therefore, even if the collision target is soft, the collision can be detected early.

Next, a satellite sensor mounting structure for an airbag device according to a third embodiment of the present invention will be described. The satellite sensor mounting structure according to the third embodiment is obtained by changing the bracket 50 of the satellite sensor mounting structure according to the first embodiment to a bracket 62.

As shown in FIG. 7, the bracket 62 includes a sensor mounting portion 62a for mounting the satellite sensors 30A and 30B, a fixing portion 62b for fixing to the front side member 48, and a sensor mounting portion which rises vertically from the fixing portion 62b. Connecting portion 62c for connecting portion 62a and fixed portion 62b
Having. Here, the connecting portion 62c has four elongated holes 62e extending in a direction intersecting the rising direction.

Even when the bracket 62 is used, when the vehicle 46 collides, the headlamp housing (or radiator support) 54 disposed at the front of the vehicle 46 is retracted, and the front of the satellite sensors 30A and 30B is moved to the front. Press backward. This allows the bracket 6
2 is deformed, the relative displacement between the satellite sensors 30A, 30B and the vehicle body increases, and the satellite sensors 30A, 30B
A large acceleration acts on B. Here, the connecting portion 62c
Since the elongated holes 62e extend in the direction intersecting the rising direction, relative displacement between the satellite sensors 30A and 30B and the vehicle body easily occurs. Therefore, even if the collision target is soft, the collision can be detected early.

Next, a satellite sensor mounting structure of an airbag device according to a fourth embodiment of the present invention will be described.

As shown in FIG. 8, the satellite sensor 30
A and 30B are fixed to the front side member 48 via a bracket 64 constituted by a first bracket 66 and a second bracket. That is, the first bracket 6
6 has a rectangular flat plate shape and has a hole 66a through which the pin 70 passes. The bottom surfaces of the satellite sensors 30A and 30B are fixed to the upper surface of the first bracket 66 by welding.

The second bracket 68 has a sliding surface 68a on which the first bracket 66 is slidably provided in the front-rear direction of the vehicle. A drop-shaped hole through which the pin 70 penetrates the sliding surface 68a. 68b. Also, the second bracket 6
8 is a fixing portion 68 for fixing to the front side member 48.
c and the sliding surface 68 which rises vertically from the fixed portion 68c.
a and a connecting portion 68d for connecting the fixing portion 68c to the fixing portion 68c.
The first bracket 64 is provided on the sliding surface 6 of the second bracket 68.
8a and the second bracket 68
Fixed to That is, the lower end of the pin 70 is
Caulk against

Even when the bracket 64 is used, when the vehicle 46 collides, the headlamp housing (or radiator support) 54 disposed at the front of the vehicle 46 is retracted, and the front of the satellite sensors 30A, 30B is moved to the front. Press backward. As a result, the first bracket 66 slides toward the rear side of the vehicle, the relative displacement between the satellite sensors 30A, 30B and the vehicle body increases, and a large acceleration acts on the satellite sensors 30A, 30B. Therefore, even if the collision target is soft, the collision can be detected early.

The drop-shaped hole 68b and the pin 70 provided on the sliding surface 68a constitute a sliding restricting means. That is, since the hole 68b provided in the sliding surface 68a has a drop shape, a certain amount of load is required for the first bracket 66 to slide rearward in the vehicle. Therefore, the deceleration required for turning on the satellite sensors 30A and 30B can be continuously obtained for a predetermined period.

Next, a satellite sensor mounting structure of an airbag device according to a fifth embodiment of the present invention will be described.

As shown in FIG. 9, the satellite sensor 30
A and 30B are fixed on the bracket 72 by welding. A slide guide 74 that holds both sides of the bracket 72 and slides the bracket 72 in the front-rear direction of the vehicle is provided on the upper surface of the front side member 48, and a latch that locks the rear end of the bracket 72. A pawl (sliding restricting means) 76 is provided.

When this satellite sensor mounting structure is used, when the vehicle 46 collides, the headlamp housing (or radiator support) 54 disposed at the front of the vehicle 46 retreats, and the satellite sensor 30A,
The front of 30B is pressed toward the rear of the vehicle. As a result, the bracket 72 slides rearward of the vehicle, the relative displacement between the satellite sensors 30A, 30B and the vehicle body increases, and a large acceleration acts on the satellite sensors 30A, 30B. Therefore, even if the collision target is soft, the collision can be detected early. The bracket 72
When the bracket 72 slides toward the rear of the vehicle because the latch pawl 76 that latches the rear end is provided,
Since the latch pawl 76 is deformed and sneaks into the rear surface of the bracket 72, a certain amount of load is required for the bracket 72 to slide toward the rear of the vehicle. Therefore, the deceleration required for turning on the satellite sensors 30A and 30B can be continuously obtained for a predetermined period.

Next, a satellite sensor mounting structure of an airbag device according to a sixth embodiment of the present invention will be described.

As shown in FIG. 10, the satellite sensor 3
0A and 30B are fixed on the bracket 78 by welding. On the upper surface of the front side member 48, a slide guide (sliding restricting means) 80 that holds both sides of the bracket 78 and slides the bracket 78 in the front-rear direction of the vehicle is provided. Here, the bracket 78 has a trapezoidal planar shape, and the sliding guide 80 is formed so that the width at the rear end side is reduced in order to hold both sides of the bracket 78.

When this satellite sensor mounting structure is used, when the vehicle 46 collides, the headlamp housing (or radiator support) 54 disposed at the front of the vehicle 46 retreats, and the satellite sensor 30A,
The front of 30B is pressed toward the rear of the vehicle. As a result, the bracket 78 slides rearward of the vehicle, the relative displacement between the satellite sensors 30A, 30B and the vehicle body increases, and a large acceleration acts on the satellite sensors 30A, 30B. Therefore, even if the collision target is soft, the collision can be detected early. The bracket 78
Has a trapezoidal planar shape and is formed so that the width at the rear end side of the sliding guide 80 is reduced.
A certain amount of load is required for the slider 8 to slide rearward of the vehicle. Therefore, the satellite sensors 30A, 30A
The deceleration required to turn on B can be obtained continuously for a predetermined period.

[0039]

According to the present invention, the connecting portion of the bracket is formed to be narrower on the fixed portion side than on the sensor mounting portion side. The headlamp housing or the like retracts, and the bracket is deformed to press the front surface of the satellite sensor, so that a large acceleration acts on the satellite sensor. Therefore, even if the collision target is soft, the collision of the vehicle can be detected early.

Further, according to the present invention, since the bracket is installed so as to be slidable in the front-rear direction of the vehicle, when the vehicle collides, the headlamp housing and the like disposed at the front of the vehicle retreat. In addition, since the front surface of the satellite sensor is pressed, the bracket slides rearward of the vehicle, and a large acceleration acts on the satellite sensor. Therefore, even if the collision target is soft, the collision of the vehicle can be detected early.

[Brief description of the drawings]

FIG. 1 is a block configuration diagram of a control device of an airbag device according to a first embodiment.

FIG. 2 is a diagram for explaining a vehicle mounting position of the satellite sensor according to the first embodiment.

FIG. 3 is a diagram for explaining a state in which the satellite sensor according to the first embodiment is mounted on a vehicle.

FIG. 4 is a perspective view of a bracket for fixing the satellite sensor according to the first embodiment.

FIG. 5 is a diagram showing a deformed state of a bracket for fixing the satellite sensor according to the first embodiment.

FIG. 6 is a perspective view of a bracket for fixing the satellite sensor according to the second embodiment.

FIG. 7 is a perspective view of a bracket for fixing a satellite sensor according to a third embodiment.

FIG. 8 is a perspective view of a bracket for fixing a satellite sensor according to a fourth embodiment.

FIG. 9 is a diagram illustrating an attached state of a satellite sensor according to a fifth embodiment.

FIG. 10 is a diagram illustrating an attached state of a satellite sensor according to a sixth embodiment.

[Explanation of symbols]

2 ... Control device for airbag device, 20 ... Control circuit, 30
A, 30B: satellite sensor, 32: floor sensor,
34 drive circuit, 36 airbag device, 44 EC
U, 46: Vehicle, 48: Front side member, 50,
60, 62, 64, 72, 78 ... bracket, 74, 8
0 ... Sliding guide.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideki Kato 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Automobile Co., Ltd. (72) Inventor Makoto Sakai 1-1-1 Showa Town, Kariya City, Aichi Prefecture Inside DENSO Corporation F term (reference) 3D054 EE04 EE06 EE19 FF03 FF16 FF20 5G056 BF01 BF04

Claims (5)

[Claims] 1. A mounting structure of a satellite sensor for fixing a satellite sensor of an airbag device to a front side member of a vehicle via a bracket, wherein the bracket includes a sensor installation part for installing the satellite sensor, and the front side member. And a connecting portion that rises from the fixing portion and connects the sensor installation portion and the fixing portion. The connection portion has a width on the fixing portion side with respect to the width of the sensor installation portion side. A satellite sensor mounting structure characterized by a narrow width. 2. A mounting structure of a satellite sensor for fixing a satellite sensor of an airbag device to a front side member of a vehicle via a bracket, wherein the bracket includes a sensor installation part for installing the satellite sensor, and the front side member. And a connecting portion that rises from the fixing portion and connects the sensor installation portion and the fixing portion, wherein the connecting portion has a corrugated shape. . 3. A mounting structure of a satellite sensor for fixing a satellite sensor of an airbag device to a front side member of a vehicle via a bracket, wherein the bracket includes a sensor installation part for installing the satellite sensor, and the front side member. And a connecting portion that rises from the fixing portion and connects the sensor installation portion and the fixing portion. The connecting portion has an elongated hole extending in a direction intersecting the rising direction. Satellite sensor mounting structure. 4. A mounting structure of a satellite sensor for fixing a satellite sensor of an airbag device to a front side member of a vehicle via a bracket, wherein the bracket includes a first bracket for installing the satellite sensor, and the first bracket. A satellite sensor mounting structure comprising: a second bracket having a sliding surface slidably mounted in the front-rear direction of the vehicle and having a fixing portion fixed to the front side member. 5. A satellite sensor mounting structure for fixing a satellite sensor of an airbag device to a front side member of a vehicle via a bracket, wherein the front side member slidably holds the bracket in the front-rear direction of the vehicle. A satellite sensor mounting structure comprising: a sliding guide portion that slides; and a sliding restricting unit that restricts sliding of the bracket.