JP2542433Y2 - Mounting structure of vehicle collision detection sensor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a vehicle collision detection sensor used for operating an airbag.

[0002]

2. Description of the Related Art Hitherto, an air bag device has been proposed for the purpose of protecting an occupant in the event of a collision of an automobile, and some of them have been put to practical use. In this airbag system, sensors are installed at multiple locations to detect the impact of a vehicle collision, and an airbag is attached to the center pad of the steering wheel. The airbag is instantly inflated by a signal from the collision detection sensor to protect the occupant. Is what you do. Some airbags are installed on the dashboard to protect passengers in the passenger seat.

As a mounting structure of a collision detection sensor mounted on the front end of a vehicle body, a stay having a hat-shaped cross section is provided between a cross member extending in the vehicle width direction and a radiator support as disclosed in Japanese Utility Model Laid-Open No. 2-60055. A collision detection sensor was attached to the junction between the rear end face of the front side member and the dashboard panel, as in the case where the vehicle was installed vertically and a collision detection sensor was attached inside the same, as in Japanese Utility Model Laid-Open No. 1-167946. There is something.

[0004]

However, in the case of the former mounting structure, since the stay for mounting the sensor has to be formed in a hat-shaped cross section different from the existing stay (hood lock support), it is newly required. In addition to the need to re-manufacture the sensor, a large impact force acts on the sensor when the hood is closed, which may cause a malfunction of the sensor. In the latter case, since the impact force applied to the front side member is transmitted to the sensor via the dashboard panel, it is difficult for the sensor to transmit the impact force, and mounting holes etc. are provided on the dashboard Unnecessary because it is necessary. Therefore, the purpose of this invention is
An object of the present invention is to provide a mounting structure of a vehicle collision detection sensor that can easily mount a collision detection sensor without changing the shape of a current vehicle body part and that does not require a special sensor mounting space.

[0005]

In order to achieve the above object, the present invention provides a sensor mounting bracket having a collision detection sensor near a front end of an outer wall of a fender apron located in a wheel house at a front portion of a vehicle body. Fasten the front and rear ends of
And the front end of the sensor protector that covers the sensor without contact
Is fixed to the front end of the fender apron
To the panel member located in front of the sensor
Of the sensor mounting bracket to the rear end of the sensor mounting bracket.
It is fastened to the extension that extends rearward .

[0006]

[Function] Even in a vehicle such as a mini car, which has limited space, there is relatively room in the wheel house, so a collision detection sensor is mounted on the outer wall of the fender apron constituting the wheel house. If the sensor is attached via the sensor, the sensor can be easily attached without changing the shape of the current vehicle body part. Further, since the sensor is exposed in the wheel house, only the sensor can be easily retrofitted without disassembling the vehicle body of the current vehicle. Fender sensor mounting bracket
Since it is fixed near the front end of the pron, it is easy to receive the impact force at the time of a frontal collision of the vehicle, and the sensor can detect the impact quickly and immediately activate the airbag or the like. In addition, the pebbles of the wheel frequently hit the side wall of the wheel house, and the sensor may be damaged or malfunction due to the stone hit. Therefore, the sensor is covered and protected by the sensor protector in a non-contact manner. In particular,
The front end of the sensor protector that covers the sensor
To the panel member located in front of the
From the rear end of the sensor mounting bracket.
Since it is fastened to the extension extending rearward, it is possible to prevent the impact of pebbles or the like hitting the sensor protector from being directly transmitted to the sensor, and to prevent malfunction of the sensor . The sensor protector does not necessarily cover the entire circumference of the sensor,
It is desirable to cover at least the surface facing the wheel.

[0007]

1 and 2 show an example of a mounting structure of a vehicle collision detection sensor according to the present invention. A fender apron 2 forming a side surface of a wheel house is provided on both sides of a front portion of the body 1, and a radiator support 3 is fixed to a front end of the fender apron 2. A cross member 4 extending in the vehicle width direction is provided between the left and right radiator supports 3.
A hood lock support 6 extends vertically between the radiator upper support 5 and the radiator upper support 5.

A hat-shaped side member 7 extending in the front-rear direction of the vehicle body is fixed to the inner surface of the fender apron 2 to form a closed cross-sectional structure. Further, a collision detection sensor 8 is mounted on a front end outer wall of the fender apron 2 located in the wheel house via a sensor mounting bracket 9. The collision detection sensor 8 is a known G sensor that is turned on when a predetermined deceleration is applied, and is connected in series to a power supply circuit of an airbag device (not shown).
Each of the front and rear ends of the sensor mounting bracket 9 is a bolt 1
At 0, 11, the fender apron 2 is attached to the closed cross-section. Particularly, the front closed cross-section of the fender apron 2 is bent outward with the side member 7 in the vehicle width direction. It is formed of a sheet metal having a substantially L-shaped cross section bent in the vehicle width direction. In addition,
These bolts 10 and 11 may be fastened together with the flange portion of the side member 7.

At least the wheel 12 side of the sensor 8 is covered with a sensor protector 13. This sensor protector 13 is also made of sheet metal similar to the sensor mounting bracket 9, and its front end is fixed to the front end of the fender apron 2.
The radiator support 3 is fixed by bolts 14 to the rear surface of the radiator support 3 which is positioned in front of the wheel house . C
Rear end of sensor mounting bracket 9 goes to fender apron 2
Is extended to the rear of the vehicle body from the mounting point of
9a, the rear end of the sensor protector 13 is
It is concluded. If the sensor protector 13 has a shape that covers the entire circumference of the sensor 8, it is possible to prevent pebbles and mud bounced on the inner surface of the wheel house from hitting the sensor 8. In the above description, only the wheel house on one side is described, but the sensor 8 is similarly mounted in the wheel house on the opposite side.

By mounting the collision detection sensor 8 in the wheel house as described above, the impact force applied to the side member 7 as in the case of a frontal collision is transmitted to the sensor 8 via the sensor mounting bracket 9 and the sensor 8 is Can be activated immediately. Further, there is no need to change the shape of the current body parts at all when mounting the sensor 8,
In addition, even in a vehicle such as a mini car, which has a lot of space restrictions, since there is relatively room in the wheel house, the sensor can be easily attached without interfering with other parts. Further, since the inside of the wheel house is exposed to the outside, the sensor 8 can be retrofitted without disassembling the vehicle body, and it is easy to change the current non-airbag-equipped vehicle to an airbag-equipped vehicle .

In this embodiment, most of the disturbance due to the impact of pebbles or the like hitting the sensor protector 13 is transmitted from the extension 9a of the sensor mounting bracket 9 to the side member 7 via the bolt 11 as shown by the arrow. Even if the disturbance is transmitted to the sensor 8, the propagation distance to the sensor 8 is long, so that the disturbance reaching the sensor 8 is very small. For this reason, there is little possibility that the sensor 8 will malfunction due to a stone hit. Further, at the time of a frontal collision, an impact force is applied to the side member 7 and the sensor 8 is actuated via the fender apron 2. However, the impact force also acts on the radiator support 3, so that the sensor protector 1
The impact force is transmitted to the sensor 8 via 3, that is, two types of impact force are transmitted. Therefore, although the operation of the sensor 8 may become unstable, the rear end portion of the sensor protector 13 as in the present invention if to attach to extension 9a of the sensor attachment bracket 9, the sensor protector 13
Is hard to transmit to the sensor 8,
, Only one impact force is transmitted, and the sensor 8 can be operated stably.

[0012]

As is apparent from the above description, according to the present invention, the collision detection sensor is mounted on the outer wall of the fender apron via the sensor mounting bracket, so that the shape of the existing body parts is not changed. The collision detection sensor can be easily mounted on the vehicle, and it is not necessary to secure a special sensor mounting space. In the present invention,
Near the front end of the outer wall of the
The end is fastened, so the impact force at the time of a frontal collision is instantly
That can be transmitted to the sensor,
Can be In addition, attach the front end of the sensor protector
Fastened to the panel member located in front of the wheel house,
Position the rear end of the sensor protector after the sensor mounting bracket.
It was fastened to the extension that extended backward from the end
Even if pebbles hit the sensor protector, the sensor
Very few disturbances reach. Because of that,
Erroneous operation of the sensor can be prevented.

[Brief description of the drawings]

FIG. 1 is a front perspective view of a vehicle body to which the present invention is applied.

FIG. 2 is a cross-sectional view of an example of the present invention.

[Explanation of symbols]

2 Fender apron 3 Radiator support (panel member) 7 Side member 8 Collision detection sensor 9 Sensor mounting bracket 9a Extension 13 Sensor protector

Claims (1)

(57) [Scope of request for utility model registration] 1. A front and rear end of a sensor mounting bracket holding a collision detection sensor is fastened near a front end of an outer wall of a fender apron located in a wheel house at a front part of a vehicle body.
And the front end of the sensor protector that covers the sensor without contact
Is fixed to the front end of the fender apron
To the panel member located in front of the sensor
Of the sensor mounting bracket to the rear end of the sensor mounting bracket.
Ri mounting structure of a vehicle collision detection sensor according to feature that it has entered into the extended portion extended rearward.