JP2012056452A - Collision detection device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collision detection device for a vehicle which is capable of detecting the collision to the end part of a vehicle bumper in the vehicle width direction.SOLUTION: The collision detection device for the vehicle which is constructed to detect the collision of a bumper cover 3 based on the detection result of a pressure sensor 8 includes: a chamber member 7 arranged in a front surface of bumper reinforcement 4 in the bumper cover 3 of the vehicle bumper 2 and having a chamber space formed inside; and the pressure sensor 8 detecting the pressure in the chamber space; wherein a reinforcement part 9, arranged on the end part in the bumper cover 3 in the vehicle width direction and deforming the chamber member 7 in a direction of compressing the chamber space to the collision to the end part of the bumper cover 3 in the vehicle width direction, is provided.

Description

  The present invention relates to a collision detection device that detects a collision of a pedestrian or the like with a vehicle.

  In recent years, regarding vehicle safety, not only ensuring the safety of a vehicle occupant during an accident, but also reducing the damage to the pedestrian when the pedestrian collides with the vehicle is required. Therefore, by detecting a collision of a pedestrian with a vehicle and operating a pedestrian protection device such as an active hood or a cowl airbag, the injury value (walking) that a pedestrian who collides with the vehicle and falls into the hood Have been proposed to reduce the impact received by a person.

  For example, as described in Japanese Patent Application Laid-Open No. 2006-117157 (Patent Document 1), a chamber member is disposed in front of a bumper reinforcement in a vehicle bumper, and a pressure change in a chamber space is detected by a pressure sensor. There has been proposed a vehicle collision detection device configured to detect a collision of a pedestrian or the like with a vehicle bumper by detection. That is, the chamber member is deformed by the collision, and the collision of a pedestrian or the like is detected based on the pressure change in the chamber space.

JP 2006-117157 A

  By the way, in the vehicle collision detection apparatus as described above, the chamber member often cannot be installed at the vehicle width direction end of the vehicle bumper due to vehicle requirements. In this case, only the collision part of the bumper cover is deformed (dented) with respect to the collision with the vehicle width direction end of the vehicle bumper, and the chamber member not extending there is not easily deformed by the collision. That is, in the vehicle collision detection device using the chamber member, there is a problem that it is difficult to detect a collision with the vehicle width direction end portion of the vehicle bumper in which the chamber member does not extend.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicle collision detection device capable of detecting a collision with a vehicle width direction end of a vehicle bumper.

  The invention according to claim 1, which has been made to achieve the above object, includes a chamber member disposed on a front surface of a bumper reinforcement within a bumper cover of a vehicle bumper and having a chamber space formed therein. A vehicle-side end in the bumper cover in a vehicle collision detection device configured to detect a collision with the bumper cover based on a detection result of the pressure sensor. And a reinforcing portion that deforms the chamber member in a direction in which the chamber space is compressed with respect to a collision of the bumper cover with the vehicle width direction end portion.

  According to this configuration, since the reinforcing portion is disposed at the vehicle width direction end, the reinforcing portion deforms the chamber member in the compression direction in response to the collision of the bumper cover with the vehicle width direction end. The reinforcement part is arrange | positioned at the vehicle width direction edge part in the bumper cover at which a chamber member does not extend at least. As a result, the pressure in the chamber space changes, and a collision of the vehicle bumper with the vehicle width direction end can be detected.

  According to a second aspect of the present invention, the reinforcing portion has rigidity higher than that of the chamber member, and extends from the front surface in the vehicle width direction end portion of the chamber member toward the vehicle width direction end portion of the bumper cover. Features.

  According to this structure, since the reinforcement part is connected only to one side (chamber member) in the vehicle width direction, it moves to the rear of the vehicle as a whole while maintaining its shape against a collision. That is, the reinforcing portion moves to the rear of the vehicle as a whole rather than deforming (depressing) with respect to the collision. As the reinforcing portion moves, the front surface of the chamber member in the vehicle width direction also moves rearward of the vehicle. That is, the end of the chamber member in the vehicle width direction is crushed rearward of the vehicle against the collision, and the chamber space is compressed. Thereby, the collision to the edge part in the vehicle width direction is detected.

  The invention according to claim 3 is characterized in that the reinforcing portion is integrally formed with the chamber member by the same material as the chamber member.

  According to this configuration, the reinforcing portion can be formed without increasing the number of parts and the number of work steps.

  The invention according to claim 4 is characterized in that the reinforcing portion is made of hard resin or metal and is integrally formed with the chamber member.

  According to this configuration, the rigidity is greater than that of a chamber member made of a soft resin, and the shape of the reinforcing portion hardly changes with respect to the collision, so that the collision can be detected more reliably.

  The invention according to claim 5 is characterized in that the reinforcing portion has a rib extending to at least one of the vehicle front side and the vehicle rear side.

  According to this configuration, the rigidity of the extending portion of the reinforcing portion is increased, and more reliable collision detection with respect to the end portion in the vehicle width direction is possible.

  The invention according to claim 6 is that the reinforcing portion has a U-shaped cross-section in the extending direction orthogonal to the extending portion from the end in the vehicle width direction of the chamber member toward the end in the vehicle width direction of the bumper cover. Features.

  According to this configuration, the reinforcing portion can be easily molded and the rigidity of the reinforcing portion can be increased.

  In the seventh aspect of the invention, the reinforcing portion is provided in the bumper cover, and the reinforcing portion is at least partially in the vehicle front portion, the vehicle upper portion, and the vehicle lower portion at the end of the bumper cover in the vehicle width direction. It is arranged.

  According to this configuration, the rigidity of the end portion in the vehicle width direction of the bumper cover increases, and the portion where the reinforcing portion extends as a whole moves rearward of the vehicle in response to a collision with the end portion. Accordingly, the end of the chamber member in the vehicle direction is crushed directly or indirectly toward the rear of the vehicle. Direct means that the reinforcing portion and the chamber member come into contact with each other, and the reinforcing portion directly crushes the chamber member. Indirect means that the reinforcing part and the chamber member do not come into contact with each other, but the reinforcing part moves as a whole toward the rear of the vehicle. Crushing. Also with this configuration, it is possible to detect a collision with the end in the vehicle width direction.

  The invention according to claim 8 is characterized in that the reinforcing portion in claim 7 is a reinforcing member made of hard resin or metal.

  According to this configuration, the rigidity of the end portion in the vehicle width direction of the bumper cover is increased, and collision detection can be performed more reliably.

  In a ninth aspect of the present invention, the reinforcing portion in the seventh aspect may be integrally formed with the bumper cover by the same material as the bumper cover.

  According to this configuration, an increase in the number of parts and work man-hours is prevented, and the rigidity of the bumper cover end in the vehicle width direction is increased, thereby enabling collision detection.

  The invention according to claim 10 is characterized in that the end of the chamber member in the vehicle width direction is spaced forward from the end of the bumper reinforcement in the vehicle width direction.

  According to this configuration, when the end of the chamber member in the vehicle width direction is crushed rearward of the vehicle, the corner of the end of the bumper reinforcement in the vehicle width direction strongly contacts the chamber member. Breakage can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole block diagram which shows the vehicle collision detection apparatus 1 of 1st embodiment by planar view. It is principal part sectional drawing which looked at the collision detection apparatus 1 for vehicles of 1st embodiment from the side. It is a schematic plan view which shows the vehicle width direction edge part of the vehicle bumper at the time of the collision in 1st embodiment. It is a schematic plan view which shows the vehicle width direction edge part of the vehicle bumper of 2nd embodiment. It is the sectional view on the AA line in FIG. It is the sectional view on the AA line in FIG. 4 of the other aspect of 2nd embodiment. It is a schematic plan view which shows the vehicle width direction edge part of the vehicle bumper of 3rd embodiment. It is a schematic plan view which shows the vehicle width direction edge part of the vehicle bumper of 4th embodiment. It is a schematic diagram which shows the vehicle width direction edge part of the vehicle bumper of 4th embodiment seen from the vehicle rear side. It is a schematic plan view which shows the other aspect of 4th embodiment. It is a schematic diagram which shows the other aspect of 4th embodiment seen from the vehicle rear side. It is a schematic diagram which shows the other aspect of 4th embodiment seen from the vehicle rear side. It is a schematic diagram which shows the other aspect of 4th embodiment seen from the vehicle rear side.

  Next, the present invention will be described in more detail with reference to embodiments.

<First embodiment>
A first embodiment will be described with reference to FIGS. As shown in FIG. 1, the vehicle collision detection apparatus 1 includes a chamber member 7 disposed in a vehicle bumper 2, a pressure sensor 8, a reinforcing portion 9, and a pedestrian protection device electronic control unit (hereinafter referred to as an electronic control unit). The control unit is abbreviated as ECU) 10.

  As shown in FIGS. 1 and 2, the vehicle bumper 2 is mainly composed of a bumper cover 3, a bumper reinforcement 4, a side member 5, an absorber 6, a chamber member 7, and a reinforcing portion 9.

  The bumper cover 3 is a resin (for example, polypropylene) cover member that extends in the vehicle width direction (left-right direction) at the front end of the vehicle and is attached to the vehicle body so as to cover the bumper reinforcement 4, the absorber 6, and the chamber member 7. is there.

  The bumper reinforcement 4 is a metal structural member that is disposed in the bumper cover 3 and extends in the vehicle width direction, and as shown in FIG. It is a hollow member which has.

  The side members 5 are a pair of metal members that are located on both the left and right sides of the vehicle and extend in the vehicle front-rear direction, and the bumper reinforcement 4 described above is attached to the front ends thereof.

  The absorber 6 is a foamed resin member that extends in the vehicle width direction and is attached to the lower side of the front surface 4 a of the bumper reinforcement 4 within the bumper cover 3, and exhibits an impact absorbing action in the vehicle bumper 2.

  The chamber member 7 is a substantially box-shaped hollow member that is disposed above the bumper reinforcement front surface 4a in the bumper cover 3 and that extends in the vehicle width direction and is made of a soft resin such as polyethylene. A tongue-like piece 11 extending downward is provided at the rear end of the chamber member 7, and the chamber member 7 is fixed to the bumper reinforcement front surface 4 a via the tongue-like piece 11 by riveting or the like. Is done. More specifically, the chamber member 7 includes a main body portion 71 and an extending portion 72.

  The main body 71 occupies most of the chamber member 7, and extends in the vehicle width direction to form a substantially sealed chamber space 7a surrounded by a wall of a soft resin having a thickness of several millimeters. The main body 71 is a part that is deformed by a collision, and a pressure change in the main body 71 is detected as a pressure change in the chamber space 7a. The main body 71 is an essential part that exhibits the function of the chamber member 7.

  Here, the vehicle width direction end portion of the main body 71 has a shape bulging outwardly. That is, one end and the other end of the chamber member 7 (main body 71) in the vehicle width direction are separated from the front surface of the bumper reinforcement 4a toward the front of the vehicle. Since both of them are arranged apart from each other, when the end of the chamber member 7 in the vehicle width direction is deformed, the end of the chamber member 7 may be damaged by the corner of the bumper reinforcement 4. Mitigated or prevented.

  The extending portion 72 is integrally formed with the main body portion 71 by a soft resin, extends from a substantially central portion in the vehicle width direction of the main body portion 71 to the upper side of the bumper reinforcement upper surface 4b, and from the vehicle body front side to the vehicle body rear side. It is an extended part. The internal space of the extending portion 71a communicates with the internal space of the main body 71 and forms a part of the chamber space 7a. In addition, an insertion port 72 a that communicates the internal space (that is, the chamber space 7 a) with the outside is provided in the upper portion of the extending portion 72.

  An insert member 72b is insert-molded in the vicinity of the insertion port 72a in the upper portion of the extended portion 72. Insert molding is one of injection molding methods, and is integrated with the chamber member 7 by placing the insert member 72b in a mold and injecting a soft resin. The insert member 72b is made of a material harder than the soft resin that is the material of the chamber member 7, for example, a metal such as iron, or a hard resin such as nylon or PBT (polybutylene terephthalate). The insert member 72b is a member for attaching the pressure sensor 8 described later to the chamber member 7. That is, the pressure sensor 8 is screwed to the insert member 72b. The insert member 72b is provided with a through hole corresponding to the insertion port 72a.

  The pressure sensor 8 is a sensor device capable of detecting a gas pressure, and is configured to be attached to the chamber member 7 so as to detect a pressure change in the chamber space 7a. Specifically, the pressure sensor 8 includes a sensor main body 81 and a pressure introduction pipe 82. The sensor main body 81 is a part that is outside the chamber member 7 and accommodates a substrate or the like provided with a sensor element for pressure detection. The sensor body 81 outputs a voltage signal proportional to the pressure, and transmits a signal to the pedestrian protection apparatus ECU10 via the signal line 10a. The sensor main body 81 has a flange portion fixed to the insert member 72b of the extending portion 72 by screws.

  The pressure introducing pipe 82 is a substantially cylindrical pipe that introduces the pressure of the chamber space 7 a into the sensor main body 81, and extends downward from the sensor main body 81. The pressure introducing pipe 82 is inserted into an insertion port 72 a provided in the extending portion 72 of the chamber member 7. The sensor main body 81 detects the pressure in the chamber space 7 a via the pressure introducing pipe 82.

  The pedestrian protection device ECU 10 is an electronic control device for performing start-up control of a pedestrian protection device (not shown) (for example, a known pedestrian protection airbag or hood flip-up device), and is output from the pressure sensor 8. Signal is input via the transmission line 10a. The pedestrian protection device ECU 10 executes a process for determining whether or not a pedestrian (that is, a human body) has collided with the vehicle bumper 2 based on the pressure detection result of the pressure sensor 8.

  The reinforcing portion 9 has a plate shape and is integrally formed with the chamber member 7 using the same material (polyethylene) as the chamber member 7. As shown in FIGS. 1 and 3, the reinforcing portion 9 extends from the front surface in the vehicle width direction of the chamber member 7 toward the vehicle width direction end of the bumper cover 3. That is, the reinforcing portion 9 includes a connecting portion 91 located on the front surface of the chamber member 7 and an extending portion 92 extending from the end portion in the vehicle width direction of the chamber member 7 toward the end portion in the vehicle width direction of the bumper cover 3. Have. The rigidity of the reinforcing part 9 is equal to or higher than the rigidity of the chamber member 7. That is, the reinforcing portion 9 is formed to have a thickness greater than that of the chamber member 7.

  Here, a method for forming the reinforcing portion 9 and the chamber member 7 in the present embodiment will be described. The chamber member 7 is formed by blow molding. In the present embodiment, the chamber member 7 is formed such that a parting line (PL) in blow molding is positioned on the vehicle rear side of the chamber member 7 (main body portion 71). That is, the chamber member 7 is formed using a set of dies having different depths (parting line positions). Since the chamber member 7 is molded by introducing air into the resin in the mold and expanding the resin, the wall thickness formed on the shallower mold mold (closer to the parting line) becomes thicker. .

  Here, in the present embodiment, the mold is arranged and blow-molded so that the parting line moves to the front of the chamber member 7 at the vehicle width direction end of the chamber member 7. That is, the thick portion can be moved to the front side by arranging the mold so that the parting line moves to the front surface (vehicle front side) of the chamber member 7 at the end in the vehicle width direction. The chamber member 7 has a parting line positioned on the vehicle rear side at the center in the vehicle width direction, and positioned on the vehicle front side at the end in the vehicle width direction. And the reinforcement part 9 extended | stretched toward the front surface and the vehicle width direction edge part of the chamber member 7 is formed by extending this thick part further in the vehicle width direction. According to this, the reinforcement part 9 can be easily formed simultaneously with the production of the chamber member 7. In addition, the thickness of the reinforcement part 9 will be about 3-4 mm equivalent to the maximum thickness of the chamber member 7 (main-body part 71). Moreover, it is preferable to form so that the width | variety of the vehicle width direction of the connection part 91 may be set to about 150 mm.

  The effects of the first embodiment will be described. As shown in FIG. 3, when the collision object X collides with the vehicle width direction edge part of the vehicle bumper 2 in this embodiment, the site | part with which the bumper cover 3 collided is dented in the vehicle rear. At the same time, the reinforcing portion 9 that is connected only to the chamber member 7 and has rigidity equal to or higher than that of the chamber member 7 is pushed into the entire rear of the vehicle by the recess of the bumper cover 3. In a collision, since the bumper cover 3 is first collided, the impact received by the reinforcing portion 9 is reduced. Further, since the reinforcing portion 9 is not fixed at both ends and is connected to the front surface of the chamber member 7 having its own rigidity or less, the reinforcing portion 9 can move rearward of the vehicle. With such a configuration, the reinforcing portion 9 moves to the rear of the vehicle as a whole against a collision. In addition, although the reinforcement part 9 may deform | transform a little by collision, even in that case, the reinforcement part 9 moves to the vehicle rear as a whole.

  And the connection part 91 of the reinforcement part 9 pushes the front surface of the chamber member 7 to the vehicle rear, and the vehicle width direction edge part of the chamber member 7 deform | transforms (dents). That is, the chamber space 7a is compressed, and the pressure in the chamber space 7a increases. The pressure sensor 8 detects this pressure change and transmits it to the pedestrian protection apparatus ECU10. As described above, the reinforcing portion 9 deforms the chamber member 7 in a direction in which the chamber space 7a is compressed in response to the collision with the end portion in the vehicle width direction. Thereby, the pressure in the chamber space 7a changes, and the pedestrian protection apparatus ECU10 can detect a collision. According to the present embodiment, the pedestrian detection range can be expanded to a range where the chamber member 7 does not extend.

  Moreover, in this embodiment, since the reinforcement part 9 and the chamber member 7 are integrally molded with the same material, an increase in a man-hour is prevented and it is advantageous also in terms of manufacturing efficiency. Further, since the bumper reinforcement 4 and the chamber member 7 are spaced apart from each other at the vehicle width direction end portion, the reinforcing member 9 causes the chamber member 7 to be deformed against a collision with the vehicle width direction end portion. In the configuration, damage to the end portion of the chamber member 7 can be reduced or prevented.

  In the case where the reinforcing portion 9 is not provided, the bumper cover 3 is only partially deformed (depressed), the chamber member 7 is hardly deformed, and a pressure change that can determine whether or not there is a collision in the chamber space 7a does not occur. .

<Second embodiment>
A second embodiment will be described with reference to FIGS. 4 and 5. The second embodiment is different from the first embodiment only in the shape of the reinforcing portion 9, and the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 4 and 5, the reinforcing portion 90 includes a connecting portion 91 and an extending portion 921. The reinforcing portion 90 is integrally formed with the chamber member 7 using the same material as the chamber member 7. The extending portion 921 extends from the end in the vehicle width direction of the chamber member 7 toward the end in the vehicle width direction of the bumper cover 3.

  The extending part 921 has two ribs 921a as shown in FIG. Both ribs 921a are plate-shaped extending along the extending portion 921, and project from the vehicle vertical direction end portion of the extending portion 921 toward the vehicle rear side. That is, the shape of the extending portion 92A in the cross-section orthogonal to the extending direction (cross-sectional view taken along line AA in FIG. 4) is a U-shape. Increasing the cross-sectional secondary moment according to the shape increases the rigidity of the extending portion 921 and makes it easier for the reinforcing portion 90 to move to the rear of the vehicle as a whole against a collision with the end in the vehicle width direction. That is, the chamber member 7 can be more reliably deformed against a collision. Further, the U-shape is relatively easy to mold and is suitable in terms of moldability.

  In addition, the extending | stretching part 921 should just have one or more rib 921a, for example, the extending direction orthogonal cross section may be T-shaped. The extending portion 921 may have three or more ribs 921a. For example, as shown in FIG. 6, the extending direction orthogonal cross section may have a comb-teeth shape. Thereby, the rigidity of the extending portion 921 can be further increased.

<Third embodiment>
A third embodiment will be described with reference to FIG. The third embodiment is different in material and molding method from the reinforcing portion of the first or second embodiment. Therefore, the configuration is the same as in FIGS. About the structure similar to 1st embodiment, a same sign is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 7, the reinforcing portion 900 of the third embodiment is plate-shaped, and unlike the first embodiment, is made of a hard resin. The hard resin is a resin having higher rigidity (here, Young's modulus) than the resin used for the chamber member 7, and is, for example, polypropylene (PP) or polybutylene terephthalate (PBT).

  The reinforcing portion 900 and the chamber member 7 are integrally formed by insert molding. Insert molding is one of injection molding methods, and is integrated with the chamber member 7 by placing a pre-molded reinforcing portion 900 in a mold and injecting a soft resin. As shown in FIGS. 1 and 7, the arrangement of the reinforcing portion 900 is the same as that of the first embodiment (having the connection portion and the extending portion). Thereby, the effect similar to 1st embodiment is acquired. Moreover, the rigidity of the reinforcement part 900 can be enlarged. In addition, the material of the reinforcement part 900 is not restricted to hard resin, Metals, such as aluminum, may be sufficient. Also by this, the rigidity of the reinforcement part 900 can be enlarged.

  Moreover, the reinforcement part 900 may provide the rib 921a in an extending | stretching part like 2nd embodiment. Thereby, the effect similar to 2nd embodiment is acquired. The cross section orthogonal to the extending direction of the reinforcing portion 900 may be, for example, a U-shape, a T-shape, or a comb-teeth shape.

<Fourth embodiment>
A fourth embodiment will be described with reference to FIGS. In addition, about the structure similar to 1st embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The reinforcing portion 9A in the third embodiment is attached to the bumper cover 3 inside the bumper cover 3, as shown in FIGS. The attachment may be, for example, screwing or fitting. The reinforcing portion 9A is a plate-like reinforcing member and is made of hard resin. The reinforcing portion 9 </ b> A is an end portion in the vehicle width direction of the bumper cover 3 and is disposed at a vehicle front portion. In other words, the reinforcing portion 9 </ b> A is disposed on the vehicle side of the vehicle width direction end portion of the chamber member 7 inside the front surface of the bumper cover 3. The left and right lengths of the reinforcing portion 9 </ b> A extend from the vehicle width direction end portion of the chamber member 7 to the vehicle width direction end portion of the bumper cover 3, and the vertical width is equal to that of the chamber member 7.

  The reinforcing portion 9A increases the rigidity of the portion of the bumper cover 3 where the chamber member 7 does not extend at the vehicle width direction end. As a result, the vehicle width direction end portion of the bumper cover 3 is easily pushed toward the rear of the vehicle as a whole with respect to the collision with the vehicle width direction end portion. The bumper cover 3 positioned in front of the chamber member 7 is also pulled rearward of the vehicle member by moving the end portion in the vehicle width direction as a whole toward the rear of the vehicle. Thereby, the vehicle width direction edge part of the chamber member 7 is pushed by the bumper cover 3, and it deform | transforms in the direction collapsed. That is, the chamber member 7 is deformed in a direction in which the chamber space 7a is compressed, and a collision is detected.

  The reinforcing portion 9A provided in the bumper cover 3 is not limited to the above. For example, as shown in FIGS. 10 and 11, the reinforcing portion 9 </ b> A may be disposed at the vehicle upper portion at the vehicle width direction end portion of the bumper cover 3. This also makes it easier for the end of the bumper cover 3 in the vehicle width direction to move backward as a whole in the event of a collision. Similarly, as shown in FIG. 12, the reinforcing portion 9 </ b> A may be disposed at a vehicle lower portion at the vehicle width direction end portion of the bumper cover 3.

  Further, as shown in FIG. 13, the reinforcing portion 9 </ b> A may be disposed at the vehicle front portion, the vehicle upper portion, and the vehicle lower portion at the end in the vehicle width direction of the bumper cover 3. As a result, the rigidity of the end portion in the vehicle width direction of the bumper cover 3 is further increased, and the entire end portion moves rearward with respect to the collision. Then, the bumper cover 3 in front of the chamber member 7 is pulled rearward, and the chamber member 7 is deformed in a crushing direction.

  The reinforcing portion 9 </ b> A may extend to the front of the end of the chamber member 7 in the vehicle width direction. Since the reinforcing portion 9A is positioned to the front of the end of the chamber member 7, when the extending portion (the portion corresponding to the extending portion 92 as a position) moves rearward, the reinforcing portion 9A in front of the chamber member 7 is directly connected to the chamber member. 7 can be pushed to the rear of the vehicle to deform the chamber member 7. At least a part of the reinforcing portions 9, 90, 900, 9 </ b> A is disposed at the vehicle width direction end portion in the bumper cover 3 where the chamber member 7 does not extend.

  Moreover, when providing the reinforcement part 9A in the vehicle front part, the width | variety of the up-down direction of 9A of reinforcement parts is not restricted above, For example, it may be below the width of the chamber member 7 and the absorber 6 more than the width of the chamber member 7. . As shown in FIG. 13, the vertical width of the reinforcing portion 9 </ b> A may be aligned with the width of the chamber member 7 and the absorber 6, for example. However, as shown in FIG. 9, it is efficient to align the width of the chamber member 7. The material of the reinforcing portion 9A may be a metal such as aluminum.

  Further, the reinforcing portion 9 </ b> A may be integrally formed with the bumper cover 3. At this time, the reinforcing portion 9 </ b> A may be made of the same material as the bumper cover 3. Thereby, an increase in the number of parts and work man-hours is prevented.

1: vehicle collision detection device, 2: vehicle bumper,
3: Bumper cover, 4: Bumper reinforcement,
5: Side member, 6: Absorber,
7: chamber member, 8: pressure sensor,
9, 90, 900, 9A: reinforcement part, 91: connection part, 92, 921: extension part,
921a: Rib, 10: Pedestrian protection device ECU

Claims (10)

A chamber member disposed in front of the bumper reinforcement within the bumper cover of the vehicle bumper and having a chamber space formed therein; and a pressure sensor for detecting the pressure in the chamber space. In the vehicle collision detection device configured to detect a collision with the bumper cover based on a detection result,
A reinforcing portion that is disposed at an end portion in the vehicle width direction in the bumper cover and that deforms the chamber member in a direction in which the chamber space is compressed against a collision with the end portion in the vehicle width direction of the bumper cover; A vehicle collision detection device.   2. The vehicle according to claim 1, wherein the reinforcing portion has rigidity higher than that of the chamber member, and extends from a front surface in the vehicle width direction end portion of the chamber member toward a vehicle width direction end portion of the bumper cover. Collision detection device.   The vehicle collision detection device according to claim 2, wherein the reinforcing portion is integrally formed with the chamber member using the same material as the chamber member.   The vehicle collision detection device according to claim 2, wherein the reinforcing portion is made of hard resin or metal and is integrally formed with the chamber member.   5. The vehicle collision detection device according to claim 2, wherein the reinforcing portion includes a rib extending to at least one of a vehicle front side and a vehicle rear side.   6. The vehicle according to claim 5, wherein the reinforcing portion has a U-shaped cross section in an extending direction extending from an end portion in the vehicle width direction of the chamber member to an end portion in the vehicle width direction of the bumper cover. Collision detection device.   2. The vehicle according to claim 1, wherein the reinforcing portion is provided in the bumper cover and is disposed at least at a part of a vehicle front portion, a vehicle upper portion, and a vehicle lower portion at a vehicle width direction end portion of the bumper cover. Collision detection device.   The vehicle collision detection device according to claim 7, wherein the reinforcing portion is a reinforcing member made of a hard resin or a metal.   The vehicle collision detection device according to claim 7, wherein the reinforcing portion is integrally formed with the bumper cover using the same material as the bumper cover.   The vehicle collision detection device according to any one of claims 1 to 9, wherein an end portion in the vehicle width direction of the chamber member is spaced forward from a vehicle width direction end portion of the bumper reinforcement.

Images