JP4807741B2 - Mounting structure for vehicle airbag sensor - Google Patents

Description

  The present invention relates to a vehicle airbag sensor mounting structure that appropriately detects an impact when a vehicle collides and activates an airbag.

  In general, an airbag device stored in a steering wheel or an instrument panel of a vehicle and operating at the time of a collision to protect an occupant detects a shock caused by the collision, such as a mechanical sensor or an electronic acceleration sensor. A collision detection sensor (airbag sensor) is used.

  For example, Japanese Patent Application Laid-Open No. 5-112195 (Patent Document 1) discloses a technique in which a crash can is provided at the front end of a front side frame and an airbag sensor is provided on the inner front of the front side frame.

Patent Document 1 described above also discloses a technique in which an airbag sensor is provided on a side portion of a tie-down hook provided on a front side frame.
Japanese Patent Laid-Open No. 5-112195

  However, in the former technique disclosed in Patent Document 1 described above, that is, in the mounting structure using a crash can, there is a possibility that the airbag is activated even in the event of a light collision. May be too sensitive. In addition, in such a mounting structure that uses the crash can to project forward of the front side frame, a reinforcing structure is formed so that the airbag sensor is not destroyed by components such as the front side frame even if the airbag sensor is retracted. There is a problem of having to.

  On the other hand, in the latter technique disclosed in Patent Document 1 described above, that is, in the structure in which the airbag sensor is attached to the side portion of the tie-down hook, the inside of the honeycomb barrier in the offset collision test and the vehicle having a different vehicle type (particularly vehicle height). At the time of a collision, the airbag sensor is also pushed forward together with the front side frame in the space formed, and there is a possibility that the detection of the collision is delayed and the deployment of the airbag is delayed.

  The present invention has been made in view of the above circumstances, and with a simple configuration, it is possible to detect a collision at an appropriate timing in various collisions such as a light collision and an offset collision, and to reliably deploy an airbag. An object of the present invention is to provide a mounting structure for a vehicle airbag sensor.

The present invention opposes the front while providing a gap between the impact detection means for detecting the applied impact , a bracket for mounting the impact detection means on the outer periphery of the front side frame of the vehicle, and the impact detection means. And an impact receiving surface erected from the front end of the bracket and a retracting means for retracting the impact detecting means when the impact receiving surface receives an impact, and a crash area is set on the front end side of the front side frame. The impact receiving surface is provided behind the crash area .

  According to the vehicle airbag sensor mounting structure of the present invention, with a simple configuration, the collision can be detected at an appropriate timing in the case of various collisions such as a light collision and an offset collision, and the airbag can be reliably deployed. Is possible.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a first embodiment of the present invention, FIG. 1 is an explanatory side view of a front side frame of a vehicle, and FIG. 2 is an explanatory view of an airbag sensor and its bracket.

  In FIG. 1, reference numeral 1 denotes a front side frame of a vehicle. The front side frame 1 includes a frame main body 2 having a hollow closed cross section along an inner side of a wheel apron (not shown) constituting a side wall of an engine room. It extends backward from the front end side of the engine room and is fixed.

  On the rear end side of the frame main body 2, a curved portion 4 that is gently curved downward is formed slightly in front of the toe board 3. At the rear portion of the curved portion 4, the rear end edge of the upper surface portion 2 a of the frame main body 2 is formed. The toe board 3 is abutted and joined by welding.

  The left and right side surface portions 2b and the lower surface portion 2c of the frame body 2 extend rearward along the lower surface of the inclined surface 3a below the toe board 3, and the upper end edges of the left and right side surface portions 2b are welded to the inclined surface 3a. Yes. The inclined surface 3a of the toe board 3 and the left and right side surface portions 2b and the lower surface portion 2c of the frame body 2 form a box-shaped closed section, and the rear extension 5 of the frame body 2 is configured.

  On the other hand, reference numeral 6 denotes left and right floor frames which are welded and joined to a lower portion of a floor panel (not shown) to form a hollow box-shaped cross section in the front-rear direction. A bent portion 7 that is bent upward along the three inclined surfaces 3a is formed. The front portion of the bent portion 7 is welded and joined at the upper surface edge to the inclined surface 3 a and the front end portion is fitted to the rear end of the rear extension 5 of the frame body 2.

  A radiator panel under frame 8 is bridged and welded to the front ends of the left and right frame main bodies 2, and the front end side of the frame main body 2 is set as a crash area.

  In FIG. 1, reference numeral 9 denotes a front suspension cross member that supports a front suspension (not shown) fixed in the width direction to the lower surface portion 2 c of the frame body 2.

  An airbag sensor 10 serving as an impact detection means is provided via a bracket 11 on the side surface on the front end side of the left and right side surface portion 2b of the frame body 2 toward the outside of the vehicle.

In FIG. 2, the airbag sensor 10 and the bracket 11 are enlarged and specifically described.
The airbag sensor 10 is, for example, a known electronic acceleration sensor that detects acceleration in a setting direction (front-rear direction), and a connector 10a protrudes from the rear. The airbag sensor 10 may be another mechanical sensor.

  For example, when the integrated value of the acceleration detected by the airbag sensor 10 exceeds a preset value, the deployment of the airbag (not shown) is performed.

  The bracket 11 has a mounting base portion 11a that is formed to be slightly larger than the airbag sensor 10 and to which the airbag sensor 10 is attached. Both end edges of the mounting base portion 11a are on the back side (the side on which the airbag sensor 10 is attached). And the opposite surface is the back surface) to form a bent portion 11b, and a gap is formed between the mounting base portion 11a and the left and right side surface portions 2b of the frame body 2. It has become.

  And the bolt 11c is being fixed by welding to the position before and behind the specification of the airbag sensor 10 from the back surface side of the mounting base part 11a. The airbag sensor 10 has bolts 11c inserted through the front and rear mounting holes 10b and fixed by nuts 11d.

  A mounting leg portion 11e that bolts the bracket 11 to the left and right side surface portions 2b of the frame body 2 is extended laterally from a portion near the center of the bent portion 11b of the bracket 11. The attachment leg portion 11e is formed in an elongated shape so that the proximal end side is easily deformed. That is, the mounting leg portion 11e is provided as a retracting means.

  From the front end of the mounting base portion 11a, an impact receiving surface 11f wider than the front surface portion of the airbag sensor 10 is erected so as to cover the front surface of the airbag sensor 10 against the front. A gap is secured between the impact receiving surface 11f and the front surface of the airbag sensor 10, so that the impact receiving surface 11f and the airbag sensor 10 are not in direct contact with each other.

  The airbag sensor 10 and the bracket 11 thus configured are attached to the left and right side surfaces 2b of the frame body 2 so that the impact receiving surface 11f of the bracket 11 is located slightly behind the crash area.

  When the vehicle collides with a front obstacle, for example, when the vehicle collides with a honeycomb barrier in an offset collision test or when vehicles of different vehicle types (particularly vehicle height) collide, A case where the collision object enters will be described.

  In this case, even if the front end of the frame main body 2 enters the colliding object, the impact receiving surface 11f of the bracket 11 collides with the colliding object, deforming the mounting leg portion 11e of the bracket 11, and the frame main body 2 As a result, the airbag sensor 10 is moved backward.

  As a result, the airbag sensor 10 senses acceleration and generates a signal. When the integrated value of the acceleration exceeds a preset value, the airbag is quickly deployed at an appropriate timing.

  On the other hand, when a light collision occurs such that the vehicle fits in a crash area such as a bumper, the left and right side surface portions 2b of the frame body 2 are positioned so that the impact receiving surface 11f of the bracket 11 is located slightly behind the crash area. Therefore, the integral value of the acceleration necessary for deploying the airbag is not reached, so that unnecessary deployment of the airbag can be reliably prevented.

  As described above, according to the first embodiment of the present invention, with a simple configuration, a collision is detected at an appropriate timing in various collisions such as a light collision and an offset collision, and the airbag is reliably deployed. Is possible.

  Next, FIG. 3 is explanatory drawing of the bracket by the 2nd Embodiment of this invention. In the second embodiment, the shape of the bracket is different from that of the first embodiment, and other configurations and operations are the same as those of the first embodiment.

  That is, as shown in FIG. 3, the bracket 21 according to the second embodiment of the present invention is formed by dividing the frame body 2 side of the impact receiving surface 21a provided to oppose the front into three parts and bending each back. Has been. The central part of the divided part is bent so as to be higher than the other side parts (bent part 21b), and the central part makes the airbag sensor 10 The mounting base 21c is attached.

  Then, bolts 21d are fixed by welding from the back side of the mounting base 21c to the front and rear positions meeting the standards of the airbag sensor 10, and the airbag sensor 10 is fixed by bolts and nuts by the bolts 21d.

  Further, both end portions of the mounting base portion 21c are bent so as to have the same height (bending portion 21e), and are provided as mounting leg portions 21f for bolting the bracket 21 to the left and right side surface portions 2b of the frame body 2. It has been.

  In addition to the hole 21g that bolts the bracket 21 to the left and right side surfaces 2b of the frame main body 2, a long hole 21h having a narrower width than the hole 21g is formed in the mounting leg 21f. Yes.

  The bracket 21 configured in this way is attached to the left and right side surfaces 2b of the frame body 2 so that the impact receiving surface 21a of the bracket 21 is located slightly behind the crash area.

  When the vehicle collides with a front obstacle, for example, when the vehicle collides with a honeycomb barrier in an offset collision test or when vehicles of different vehicle types (particularly vehicle height) collide, A case where the collision object enters will be described.

  In this case, even if the front end of the frame main body 2 enters the collision object, the impact receiving surface 21a of the bracket 21 collides with the collision object, and the fixing bolt is guided by the long hole 21h of the mounting leg 21f. By this, or the bent portion 21b and the bent portion 21e are further bent backward, the airbag sensor 10 is moved backward relative to the frame body 2. That is, in the second embodiment, the long hole 21h, the bent portion 21b, and the bent portion 21e are provided as the retreating means.

  As a result, the airbag sensor 10 senses acceleration and generates a signal. When the integrated value of the acceleration exceeds a preset value, the airbag is quickly deployed at an appropriate timing.

  On the other hand, when a light collision occurs such that the vehicle fits in a crash area such as a bumper, the left and right side surfaces 2b of the frame body 2 are arranged so that the impact receiving surface 21a of the bracket 21 is located slightly behind the crash area. Therefore, the integral value of the acceleration necessary for deploying the airbag is not reached, so that unnecessary deployment of the airbag can be reliably prevented.

  As described above, according to the second embodiment of the present invention, as in the first embodiment, the collision is detected at an appropriate timing in the case of various collisions such as a light collision and an offset collision with a simple configuration, and the air is reliably detected. It is possible to unfold the back.

  Next, FIG. 4 is explanatory drawing of the bracket by the 3rd Embodiment of this invention. In the third embodiment, the shape of the bracket is different from that of the first embodiment, and other configurations and operations are the same as those of the first embodiment.

  That is, as shown in FIG. 4, in the bracket 31 according to the third embodiment, the impact receiving surface 31a provided to oppose the front is bent rearward (bent portion 31b), and this rearward is directed to the rear. A bent portion is provided as a mounting leg portion 31c.

  In addition to the hole 31d that bolts the bracket 31 to the left and right side surfaces 2b of the frame body 2, the mounting leg 31c has a width dimension narrower than that of the hole 31d. A long hole 31e is formed.

  Also, a T-shaped mounting base 31g for attaching the airbag sensor 10 is fixed to the impact receiving surface 31a by welding or the like, which is formed as a separate component from the impact receiving surface 31a and is bent by the bent portion 31f. ing. The bolt 31h is fixed by welding from the back surface side of the mounting base 31g to the front and rear positions that meet the specifications of the airbag sensor 10, and the airbag sensor 10 is fixed by bolts and nuts by the bolt 31h. .

  The bracket 31 configured in this manner is attached to the left and right side surfaces 2b of the frame body 2 so that the impact receiving surface 31a of the bracket 31 is located slightly behind the crash area.

  When the vehicle collides with a front obstacle, for example, when the vehicle collides with a honeycomb barrier in an offset collision test or when vehicles of different vehicle types (particularly vehicle height) collide, A case where the collision object enters will be described.

  In this case, even if the front end of the frame main body 2 enters the collision object, the impact receiving surface 31a of the bracket 31 collides with the collision object, and the fixing bolt is guided by the long hole 31e of the mounting leg 31c. Accordingly, the airbag sensor 10 is moved backward relative to the frame body 2 by further bending the bent portion 31b and the bent portion 31f rearward. That is, in the third embodiment, the long hole 31e, the bent portion 31b, and the bent portion 31f are provided as the retracting means.

  As a result, the airbag sensor 10 senses acceleration and generates a signal. When the integrated value of the acceleration exceeds a preset value, the airbag is quickly deployed at an appropriate timing.

  On the other hand, the left and right side surface portions 2b of the frame body 2 are arranged so that the impact receiving surface 31a of the bracket 31 is located slightly behind the crash area when a light collision occurs such that the vehicle can fit in a crash area such as a bumper. Therefore, the integral value of the acceleration necessary for deploying the airbag is not reached, so that unnecessary deployment of the airbag can be reliably prevented.

  As described above, according to the third embodiment of the present invention, as in the first embodiment, the collision is detected at an appropriate timing in a variety of collisions such as a light collision and an offset collision with a simple configuration, and the air is reliably detected. It is possible to unfold the back.

  Next, FIG. 5 is explanatory drawing of the bracket by the 4th Embodiment of this invention. In the fourth embodiment, the shape of the bracket is different from that of the first embodiment, and other configurations and operations are the same as those of the first embodiment. Therefore, the description thereof is omitted.

  That is, as shown in FIG. 5, in the bracket 41 according to the fourth embodiment, both end portions of the impact receiving surface 41a provided facing the front extend to the frame body 2 side, and both end portions are directed rearward. A bent portion (bent portion 41b) and a portion bent toward the rear are provided as mounting leg portions 41c.

  In addition to the holes 41d for bolting the brackets 41 to the left and right side surfaces 2b of the frame body 2, the mounting legs 41c are respectively formed with long holes 41e having a narrower width than the holes 41d. Yes.

  Further, a T-shaped mounting base portion 41g to which the airbag sensor 10 is attached is fixed to the impact receiving surface 41a by welding or the like, which is formed as a separate part from the impact receiving surface 41a and is bent by the bent portion 41f. ing. A bolt 41h is fixed by welding from the back surface side of the mounting base 41g to a position before and after meeting the standard of the airbag sensor 10, and the airbag sensor 10 is fixed by a bolt-nut with the bolt 41h. .

  The bracket 41 configured in this manner is attached to the left and right side surface portions 2b of the frame body 2 so that the impact receiving surface 41a of the bracket 41 is located slightly behind the crash area.

  When the vehicle collides with a front obstacle, for example, when the vehicle collides with a honeycomb barrier in an offset collision test or when vehicles of different vehicle types (particularly vehicle height) collide, A case where the collision object enters will be described.

  In this case, even if the front end of the frame main body 2 has entered the collision object, the impact receiving surface 41a of the bracket 41 collides with the collision object, and the fixing bolt is guided by the long hole 41e of the mounting leg 41c. By this, or the bent part 41b and the bent part 41f are further bent backward, the airbag sensor 10 is moved backward relative to the frame body 2. That is, in the fourth embodiment, the long hole 41e, the bent portion 41b, and the bent portion 41f are provided as the retreating means.

  As a result, the airbag sensor 10 senses acceleration and generates a signal. When the integrated value of the acceleration exceeds a preset value, the airbag is quickly deployed at an appropriate timing.

  On the other hand, the left and right side surfaces 2b of the frame body 2 are arranged so that the impact receiving surface 41a of the bracket 41 is located slightly behind the crash area when a light collision occurs such that the vehicle fits in a crash area such as a bumper. Therefore, the integral value of the acceleration necessary for deploying the airbag is not reached, so that unnecessary deployment of the airbag can be reliably prevented.

  As described above, according to the fourth embodiment of the present invention, as in the first embodiment, the collision is detected at an appropriate timing in the case of various collisions such as a light collision and an offset collision with a simple configuration, and the air is reliably detected. It is possible to unfold the back.

  In each embodiment, the brackets 11, 21, 31, and 41 are attached to the left and right side surfaces 2 b of the frame body 2 toward the outside of the vehicle. You may make it attach toward the upper surface, lower surface of this, or the inner side of a vehicle.

Side surface explanatory drawing of the front side frame of the vehicle by the 1st Embodiment of this invention Same as above, illustration of airbag sensor and its bracket Explanatory drawing of the bracket by 2nd Embodiment of this invention Explanatory drawing of the bracket by the 3rd embodiment of the present invention. Explanatory drawing of the bracket by 4th Embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front side frame 2 Frame main body 2b Left and right side surface part 8 Radiator panel under frame 10 Air bag sensor (impact detection means)
11 Bracket 11a Mounting base 11b Mounting hole 11c Bolt 11d Nut 11e Mounting leg (retracting means)
11f Impact receiving surface

Claims (1)

An impact detection means for detecting an applied impact;
A bracket for attaching the impact detection means to the outer periphery of the front side frame of the vehicle;
An impact receiving surface erected from the front end of the bracket in opposition to the front while providing a gap between the impact detection means ;
Retraction means for retreating the impact detection means when the impact receiving surface receives an impact;
Equipped with a,
A structure for mounting an airbag sensor for a vehicle , wherein a crash area is set on a front end side of the front side frame, and the impact receiving surface is provided behind the crash area .

Images