JPH0687404A - Collision sensor fitting structure for side air bag device - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the collision detection speed. [Structure] On the base plate 12 of the touch sensor 11,
An attachment portion 17 having a concave curved surface having substantially the same curvature is formed on the outer peripheral surface of the side door beam 14. The attachment portion 17 is attached to the outer peripheral surface of the side door beam 14 with an adhesive or the like while being in close contact with the outer peripheral surface of the side door beam 14. Therefore, at the time of a collision, the touch sensor 11 is immediately crushed and turned on without being bent and deformed, so that the collision can be detected quickly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collision sensor mounting structure for inflating a side airbag, which protects an occupant from a secondary collision with a side wall of a vehicle compartment during a side collision, at an appropriate timing.

[0002]

2. Description of the Related Art As an example of a collision sensor of a sad air bag device that has been developed so far, Japanese Patent Application No. 3-1601 has been proposed.
Some are described in the specification attached to the application for No. 43. The long collision sensor 1 described here is shown in FIG.
As shown in FIG. 7 and FIG. 7, the collision sensor 1 outputs a detection signal by detecting a side collision, and is in the shape of a thin rectangular pipe that is relatively easily deformed. The inner surfaces of the contacts 1a, 1
b is formed. When the collision sensor 1 is crushed by a collision load, the two contact points 1a and 1b facing each other are crushed.
And a side collision is detected, and the gas generating agent in the inflator is ignited by the output detection signal.

Further, the collision sensor 1 includes a side door 2
Between the outer panel 3 of the side door 2 and a side door beam 4 made of a round steel pipe provided almost horizontally just inside the outer panel 3 on the side door beam 4 side. It is fixedly attached by a bolt nut 6 via a bracket 5.

The collision sensor 1 is attached to a side door beam 4 inside a side door 2 by a belt-shaped bracket 5. That is, the collision sensor 1 is only in line contact with the central portion of the side door beam 4 having a circular cross section, and as shown in FIG.
It is separated from the outer peripheral surface of the side door beam 4.
Therefore, when a collision load is applied to the collision sensor 1 via the outer panel 3 which is deformed during a side collision, the collision sensor 1
In the initial stage of deformation, the crushing load is not immediately crushed but is once bent and then crushed. Since the collision detection is delayed by the amount of bending, the crushing load of the collision sensor 1 is considered in advance in consideration of the delay. Had to set.

Therefore, a mounting structure shown in FIG. 8 is adopted as a method for eliminating the delay in collision detection due to the bending of the collision sensor 1. This uses a bracket 7 having a U-shaped cross section, which has a length substantially the same as that of the long collision sensor 1 and has a surface 7a perpendicular to the direction in which a collision load is applied when it is attached to the side door beam 4. This bracket 7 is attached to the side door beam 4 by welding, and comprises a base plate 8a and a pressure receiving plate 8b on a surface 7a that is substantially parallel to the outer panel 3, and is a type of collision sensor that detects a collision when it is crushed and the contacts are conducted. 1 is attached. Therefore, according to this mounting structure, the collision sensor 1 is mounted so that the entire back surface is in close contact with the surface 7a of the bracket 7, and therefore, when the collision load is applied, the collision sensor 1 does not bend and is immediately crushed to detect a collision. it can.

[0006]

However, in the case of mounting the collision sensor 8 via the bracket 7 having the U-shaped cross-section described above, the collision sensor 8 is provided in close contact with the flat surface of the bracket 7, When the collision load is applied, the side collision is detected immediately because it is not squeezed and is crushed immediately, so that the side collision can be detected at an early stage. 4 and further the collision sensor 8 needs to be attached to this bracket 7 using a fastening band or other attachment means. Therefore, there is a problem that it takes time to install the collision sensor.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a collision sensor mounting structure that is easy to mount and can detect a side collision reliably and early.

[0008]

As a means for solving the above problems, the present invention provides a collision sensor that outputs a signal when a vehicle collision is detected, on a non-planar sensor mounting surface of a side door beam. In the collision sensor mounting structure of the side airbag device to be mounted, a mounting portion having a sectional shape along the sensor mounting surface of the side door beam is integrally formed on the side facing the pressure receiving surface of the collision sensor that receives the collision load. The collision sensor is fixed to the outer side of the vehicle body of the side door beam by bringing the portion into contact with the sensor mounting surface.

Further, the collision sensor is characterized in that a fastening band for holding the side door beam is preliminarily attached in a state where the attachment portion is in contact with the sensor mounting surface of the side door beam.

[0010]

As described above, since the collision sensor is provided with the mounting portion having a sectional shape along the sensor mounting surface of the side door beam on the side facing the pressure receiving surface receiving the collision load,
It can be attached by abutting on the non-planar sensor mounting portion of the side door beam. Therefore, the collision sensor can be easily attached to the side door beam, and since the contact area between the side door beam and the collision sensor is large, when the collision load is input, the collision sensor does not bend and immediately crushes the side surface. A collision is detected early.

The collision sensor can be attached to the side door beam by attaching a fastening band for holding the side door beam in a state where the mounting portion of the collision sensor is in contact with the sensor mounting surface of the side door beam. Will be easier.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a collision sensor mounting structure for a side airbag device according to the present invention will be described below with reference to FIGS.

1 to 3 show a first embodiment of the present invention, the air bag of this side air bag device is provided inside the side door or on the vehicle compartment side of the side door (not shown). It is housed in the armrest, etc. When a side collision is detected, the collision detection touch sensor 11 that outputs a detection signal for igniting the gas generating agent in the inflator is composed of a base plate 12 and a pressure receiving plate 13 as shown in FIG. There is.

The base plate 12 is an extruded product of aluminum alloy and is formed to have a length substantially the same as that of the side door beam 14 provided substantially horizontally in the side door. Two pressure-sensitive ridges 15, 15 that crush when a predetermined load is applied to the pressure receiving side, which is the door outer panel side)
Are formed in parallel with each other so as to be separated from each other (see FIG. 3). Further, a tape-shaped switch 16 which is electrically connected when compressed is arranged between the two protrusions 15 over the entire length. Also, on this pressure receiving side,
The pressure receiving plate 13 is attached so as to cover the space between the ridges 15, 15. On the side of the base plate 12 facing the pressure receiving side surface, a mounting portion 17 having a concave curved surface having substantially the same curvature as the outer peripheral surface of the side door beam 14 is formed over the entire length of the base plate 12 in the longitudinal direction.

The touch sensor 11 is formed over the entire length between the side door beam 14 provided substantially horizontally in the side door on the side surface of the vehicle body and the inner surface of the outer panel of the side door. The mounting portion 17
The concave curved surface is attached to the outer peripheral surface of the side door beam 14 without any gap, and is firmly adhered with an adhesive.

Next, the operation of this embodiment configured as described above will be described.

As described above, the touch sensor 11 attached to the side door beam 14 in the side door receives an ON signal by being pinched by the outer door panel 14 and the side door beam 14 which are deformed by being pushed by the colliding vehicle during a side collision. Output. That is, at the time of a side collision, the outer panel is first deformed, and the touch sensor 11 is turned on by being pinched by the outer panel and the highly rigid side door beam 14.
At this time, the touch sensor 11 is attached so that the concave curved surface of the attachment portion 17 is in close contact with the outer peripheral surface of the side door beam 14, and further, the touch sensor 11 is integrally attached in surface contact over substantially the entire length of the side door beam 14. There is.

Therefore, this long touch sensor 11
Has no part floating from the side door beam 14 as in the case where a plurality of positions are fixed by a bracket, and has a large area of surface contact at the mounting portion 17, so that any position in the longitudinal direction is immediately compressed. When turned on, a collision can be detected. Further, when an external force is applied to the touch sensor 11 at the time of a collision, the touch sensor 11 is immediately crushed without being partially deformed such as bending, so that the touch sensor 11 itself is not deformed to cause a delay in detection.
Then, when a collision is detected, an ignition signal is sent to the inflator, the large amount of generated gas inflates the airbag and deploys it between the occupant and the passenger compartment side wall, and a secondary collision occurs immediately after the side collision. Protect the occupants from.

Therefore, the touch sensor 1 of this embodiment
1, the mounting portion 17 is formed into a curved surface shape that fits into the outer diameter of the side door beam 14 made of round steel pipe.
Since it is attached by an adhesive in a state of being in surface contact with the bracket, there is an advantage that the bracket is not necessary and can be easily and surely attached.

4 and 5 show a second embodiment of the present invention, in which the touch sensor 21 is formed on a base plate 22 which is an extruded product of an aluminum alloy and one side surface of the base plate 22. The tape-shaped switch 23 attached to the inner bottom portion of the square groove 22a and the pressure receiving plate 24 that covers the tape-shaped switch 23 and closes the square groove 22a are provided.
On the back side (front side in FIG. 4) of the side surface on which the square groove 22a is formed, there is formed a mounting portion 26 having a concave curved surface having substantially the same curvature as the outer peripheral surface of the side door beam 25 on which the base plate 22 is mounted. There is.

Further, a fastening band 27 for fastening the base plate 22 to the side door beam 25 is attached to the base plate 22 with a mounting groove 28 having an arcuate cross section.
Are formed in the mounting portion 26 at a plurality of predetermined intervals. The mounting groove 28 has a fastening band fitting groove 28a whose center is formed deeper, and a lid which is shallower than the fastening band fitting groove 28a on both sides of the fastening band fitting groove 28a by the thickness of the fastening band 27. A groove 28b is formed, and a lid member 29 that fits into the lid mounting groove 28b and holds the fastening band 27 in between is fixed. The lid member 29 has a concave curved surface of the mounting portion 26 on the back surface. It has a concave curved surface 29a having the same curvature as. Then, the lid member 29
Fits in the lid mounting groove 28b and is welded to the side of the base plate 22 to integrally fix the fastening band 27 fitted in the fastening band fitting groove 28a to the base plate 22 and to form the concave curved surface 29a of the lid member 29. But mounting part 2
The concave curved surface of No. 6 is aligned with the same height.

Therefore, as described above, the fastening band 27 is preliminarily attached to the attachment portion 26 side of the base plate 22, and at the inside of the portion where the fastening band 27 is attached,
Since the lid member 29 having the concave curved surface 29a having the same curvature as that of the mounting portion 26 is provided, the base plate 22 can be mechanically mounted by being fastened with the bolt nuts 30 while being in contact with the side door beam 25 over a wide area. The same action and effect as in the case of the first embodiment can be obtained, and the work of attaching or detaching the touch sensor 21 to or from the side door beam 25 can be facilitated.

In both of the above embodiments, the touch sensors 11 and 2 are attached to the side door beams 14 and 25 having a circular cross section.
Although the case of attaching 1 has been described, the touch sensor mounting portion is formed in accordance with the shape of the sensor mounting surface of a side door beam having an irregular shape other than a circular cross section, such as an elliptical cross section or a corrugated cross section. It can also be used for side door beams.

[0024]

As described above, according to the collision sensor mounting structure of the side airbag device of the present invention, the cross-sectional shape along the sensor mounting surface of the side door beam is provided on the side facing the pressure receiving surface of the collision sensor which receives the collision load. Since the mounting portion is integrally formed and the mounting portion is brought into contact with the sensor mounting surface so that the collision sensor is fixed to the vehicle body outer side of the side door beam, the collision sensor is bent and deformed at the time of collision. Without doing so, it can be crushed immediately and the collision can be detected quickly. Further, if the fastening band for holding the side door beam is attached in advance with the mounting portion of the collision sensor in contact with the sensor mounting surface of the side door beam, the collision sensor can be easily attached to the side door beam. Have the effect of.

[Brief description of drawings]

FIG. 1 is a perspective view showing a collision sensor attached to a side door beam in a first embodiment of an attachment structure of the present invention.

FIG. 2 is a cross-sectional view of a touch sensor used in the mounting structure of this embodiment.

FIG. 3 is a perspective view of a base plate used in the mounting structure of this embodiment.

FIG. 4 is an exploded perspective view showing a mounting state of the fixing belt to the base plate in the second embodiment of the mounting structure of the invention.

FIG. 5 is a cross-sectional view of the fastening band portion with the touch sensor attached to the side door beam.

FIG. 6 is an explanatory view showing a conventional collision sensor mounting structure.

7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is an explanatory diagram showing another example of a conventional collision sensor mounting structure.

[Explanation of symbols]

 Reference Signs List 11 touch sensor 12 base plate 13 pressure receiving plate 14 side door beam 15 pressure-sensitive ridge 17 mounting portion formed on a concave curved surface 22 base plate 26 mounting portion 27 fastening band 29 lid member

Claims (2)

[Claims] 1. A collision sensor mounting structure for a side airbag device, wherein a collision sensor that outputs a signal when a vehicle collision is detected is mounted on a non-planar sensor mounting surface of a side door beam. On the side facing the pressure receiving surface that receives the pressure sensor, a mounting portion having a sectional shape along the sensor mounting surface of the side door beam is integrally formed, and the mounting sensor is brought into contact with the sensor mounting surface to cause the collision sensor to detect the side door beam. A collision sensor mounting structure for a side airbag device, which is fixed to an outer side of a vehicle body. 2. The collision sensor is characterized in that a fastening band for holding the side door beam is attached in advance in a state where an attachment portion of the collision sensor is in contact with a sensor attachment surface of the side door beam. The collision sensor mounting structure of the side airbag device according to 1.