JP2015093496A - Collision detection device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collision detection device for a vehicle which improves collision detection accuracy by a chamber member in a chamber type collision detection device for a vehicle.SOLUTION: A collision detection device 1 for a vehicle includes a chamber member 2 which is arranged on a vehicle front side of a bumper reinforcement 9 in a bumper 6 of a vehicle and formed with a chamber space 2a therein, and a pressure sensor 3 for detecting pressure in the chamber space 2a, and detects collision of an object to the bumper 6 on the basis of a pressure detection result by the pressure sensor 3. The chamber member 2 includes a non-facing part 2b which does not face a front surface 9a of the bumper reinforcement 9, and a support member 4 at least one part of which is connected to the non-facing part 2b of the chamber member 2 and the other part of which is fixed to the bumper reinforcement 9 being a rigid member on the vehicle side.

Description

  The present invention relates to a vehicle collision detection device that can accurately detect the occurrence of a vehicle collision accident.

  Conventionally, there is a vehicle including a pedestrian protection device for reducing an impact on a pedestrian when the pedestrian collides with the vehicle. In this vehicle, a bumper unit is provided with a collision detection device, and when this sensor detects that a pedestrian or the like has collided with the vehicle, the pedestrian protection device is activated to reduce the impact on the pedestrian. It has become. This pedestrian protection device includes what is called a pop-up hood, for example. This pop-up hood raises the rear end of the engine hood when a vehicle collision is detected, increases the clearance (clearance) between the pedestrian and hard parts such as the engine, and uses that space to the pedestrian's head. It absorbs collision energy and reduces the impact on the head.

  In this vehicle collision detection device, a chamber member having a chamber space is disposed in front of a bumper reinforcement in a vehicle bumper, and the pressure in the chamber space is detected by a pressure sensor. A collision is detected. Specifically, when an object (such as a pedestrian) collides with a bumper (bumper cover), the chamber member is deformed along with the deformation of the bumper cover, and a pressure change is generated in the chamber space. The pressure sensor detects this pressure change, thereby detecting an object collision.

  In the above configuration, the chamber member has a non-opposing portion that does not face the front surface of the bumper reinforcement, such as when protruding outward in the vehicle width direction from the end in the vehicle width direction of the bumper reinforcement. There may be. In this case, when a collision occurs in the vicinity of the non-opposing portion of the chamber member, the rear wall portion of the non-opposing portion does not come into contact with the front surface of the bumper reinforcement, and deformation different from the other portions of the chamber member occurs. The collision detection accuracy may not be ensured. Therefore, a thick reinforcing portion is provided on the rear wall portion of the non-facing portion of the chamber member so that the collision can be accurately detected even when a collision occurs in a portion where the bumper reinforcement does not exist behind the chamber member. There is what can be made (for example, see Patent Document 1).

JP 2010-163155 A

  However, in the vehicle collision detection device having the above-described configuration, when there is no member for supporting the chamber member at both ends of the chamber member, when a pedestrian or the like collides from the front of the vehicle near the left and right end portions of the bumper cover, There exists a problem that there exists a possibility that the pressure change in a tube member may not be detected correctly because a chamber member will bend to the vehicle rear side.

  The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a vehicle-type vehicle collision detection device that improves the accuracy of collision detection by a chamber member. .

  The vehicle collision detection device (1) according to claim 1, which has been made to solve the above object, is disposed on the vehicle front side of a bumper reinforcement (9) in a bumper (6) of the vehicle, A chamber member (2) having a chamber space (2a) formed therein, and a pressure sensor (3) for detecting the pressure in the chamber space, and an object to the bumper based on the pressure detection result by the pressure sensor Detect collisions. The chamber member has a non-facing portion (2b) that does not face the front surface (9a) of the bumper reinforcement. At least a part (4c, 41c, 42c) is connected to the non-opposing part, and the other part (4d, 41d, 42d) is fixed to the rigid member (9) on the vehicle side (4, 41, 42). ).

  According to this configuration, since a part of the chamber member is connected to the non-opposing part of the chamber member and the other part is fixed to the rigid member on the vehicle side, an object such as a pedestrian is located near the non-opposing part. When the collision occurs, the support member supports the non-opposing portion that receives an external force from the front of the vehicle, so that the non-opposing portion of the chamber member can be prevented from bending toward the vehicle rear side. Accordingly, even when a collision occurs in a portion where no bumper reinforcement exists behind the chamber member, the collision detection can be performed accurately, so that the collision detection accuracy of the vehicle collision detection device can be improved. In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

1 is a diagram illustrating an overall configuration of a vehicle collision detection device according to a first embodiment of the present invention. It is an enlarged view of the bumper part of FIG. It is an enlarged view of a support member periphery. It is a figure which shows a supporting member. FIG. 3 is a view corresponding to FIG. 3 before the support member is fixed to the bumper reinforcement. It is a cross-sectional view of the bumper part of FIG. FIG. 3 is a view corresponding to FIG. 3 of the vehicle collision detection apparatus according to the second embodiment. FIG. 3 is a view corresponding to FIG. 3 of a vehicle collision detection apparatus according to a third embodiment.

[First Embodiment]
Hereinafter, a vehicle collision detection apparatus according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the vehicle collision detection device 1 of the present embodiment includes a hollow chamber member 2, a pressure sensor 3, a support member 4, a collision detection ECU 5, and the like. This vehicle collision detection apparatus 1 detects a collision of an object (such as a pedestrian) with a bumper 6 provided in front of the vehicle. The bumper 6 is mainly composed of a bumper cover 7, a bumper absorber 8, and a bumper reinforcement 9.

  As shown in FIG. 6, the chamber member 2 is disposed in the upper part of the front surface 9 a (vehicle front side) of the bumper reinforcement 9 in the bumper 6 of the vehicle, in this case, in the upper part of the bumper absorber 8. The chamber member 2 is a member having a substantially square cross-sectional shape, having a hollow portion 2a formed therein, and extending in the vehicle width direction (vehicle left-right direction). This chamber member 2 is made of a synthetic resin such as polyethylene, and is a member having an action of pressure transmission in the bumper 6 at the time of collision.

  As shown in FIG. 3, both end portions of the chamber member 2 are formed to protrude outward from both ends of the bumper reinforcement 9 in the vehicle width direction, and face the front surface 9 a of the bumper reinforcement 9. The non-opposing portion 2b is not provided. A support member 4 to be described later is disposed on the vehicle rear side of the non-opposing portion 2b of the chamber member 2.

  The chamber space 2a is surrounded by the chamber member 2, but is not hermetically sealed, and is communicated with the outside air in some narrow portions and is at atmospheric pressure. As a result, a pressure difference from the outside air due to an altitude difference or a change in temperature is prevented so that the collision detection is not affected by the change in altitude or temperature.

  Two pressure sensors 3 are arranged on the vehicle rear side of the front surface 9a of the bumper reinforcement 9. Specifically, the pressure sensor 3 is fixed and attached by fastening a bolt (not shown) to the rear surface 9b of the bumper reinforcement 9.

  The pressure sensor 3 is a sensor device that detects a change in gas pressure, and is assembled to the chamber member 2. Specifically, the pressure receiving portion (not shown) is inserted into the chamber space 2a via the insertion port (not shown), and the pressure change of the air in the chamber space 2a is detected. . As shown in FIG. 1, the pressure sensor 3 is electrically connected to a collision detection ECU (Electronic Control Unit) 5 via a transmission line, and outputs a signal proportional to the pressure to the collision detection ECU 5. The collision detection ECU 5 detects the collision of the object with the bumper 6 based on the pressure detection result by the pressure sensor 3.

  As shown in FIG. 4, the support member 4 is a rectangular plate-like member, and includes a plate-like main body portion 40, a hole 4 a provided in the main body portion 40, and a hinge portion 4 b. The support member 4 is made of a synthetic resin such as polyethylene and is integrally formed with the chamber member 2 (see FIG. 5). The support member 4 and the chamber member 2 are formed by, for example, blow molding. The hole 4a of the support member 4 is for passing the bolt 11 and fastening the support member 4 to the rigid member, and has a long hole shape extending in the vehicle width direction (vehicle left-right direction). The hinge part 4b is an integral hinge that connects one end 4c (corresponding to a part) of the main body part 40 and the tip of the non-opposing part 2b with a thin resin. The support member 4 is bent to the bumper reinforcement 9 side at the hinge portion 4b in a state where the one end 4c of the main body portion 40 is connected to the non-opposing portion 2b of the chamber member 2, and the other end 4d of the main body portion 40 (others) Is fixed to the bumper reinforcement 9. In this case, the support member 4 is fixed to the rear surface 9b of the bumper reinforcement 9 which is a rigid member on the vehicle side by fastening bolts 11.

  The support member 4 is disposed on the vehicle rear side of the chamber member 2 so as to face the entire non-opposing portion 2b of the chamber member 2. That is, the length of the support member 4 in the vertical direction is longer than the length of the chamber member 2 in the vertical direction, and the length of the support member 4 in the vehicle width direction (vehicle left-right direction) is It is longer than the length from one side end (left side end in FIG. 3) to one side end (left side end in FIG. 3) of the bumper reinforcement 9. Further, the support member 4 is disposed along the outer shape of the bumper reinforcement 9, that is, on the substantially extended line of the end portion of the bumper reinforcement 9. Note that the thickness of the support member 4 is, for example, 1 mm or more. The number of holes 4a and bolts 11 can be changed as appropriate.

  The collision detection ECU 5 is composed mainly of a CPU and controls the overall operation of the vehicle collision detection apparatus 1 and is electrically connected to the pressure sensor 3 and the pedestrian protection apparatus 10 (FIG. 1). reference). A pressure signal (pressure data) or the like from the pressure sensor 3 is input to the collision detection ECU 5. The collision detection ECU 5 executes a predetermined collision determination process based on the pressure detection result (input signal) by the pressure sensor 3, and detects the collision of an object such as a pedestrian to the bumper 6, the pedestrian protection device 10. Operate.

  As described above, the bumper 6 includes the bumper cover 7, the bumper absorber 8, and the bumper reinforcement 9 as main components. The bumper cover 7 is a resin member such as polypropylene provided so as to cover the components of the bumper 6. The bumper cover 7 constitutes the appearance of the bumper 6 and at the same time constitutes a part of the appearance of the entire vehicle.

  As shown in FIG. 6, the bumper absorber 8 is provided on the front surface 9 a of the bumper reinforcement 9 and is disposed so as to surround the chamber member 2. The bumper absorber 8 is a member responsible for shock absorption in the bumper 6 and is made of, for example, foamed polypropylene.

  The bumper reinforcement 9 (corresponding to a rigid member) is a beam-like member made of metal such as aluminum, and is disposed in the bumper 6 and extends in the vehicle width direction. The bumper reinforcement 9 is attached to the front end of a side member 12 that is a pair of metal members (rigid members) extending in the vehicle longitudinal direction.

  Usually, in a vehicle collision accident, there are many cases where the vehicle collides with a pedestrian or a vehicle existing in the traveling direction of the vehicle (front of the vehicle). For this reason, in this embodiment, the pressure sensor 3 is disposed on the rear surface 9b of the bumper reinforcement 9, and an impact (external force) due to a collision with a pedestrian or vehicle in front of the vehicle is provided in front of the vehicle. Direct transmission from the bumper cover 7 or the like to the pressure sensor 3 is protected by the presence of the bumper reinforcement 9.

  For example, a pop-up hood is used as the pedestrian protection device 10. This pop-up hood raises the rear end of the engine hood instantly after detecting a vehicle collision, increases the clearance (clearance) between the pedestrian and hard parts such as the engine, and uses that space to make the pedestrian's head The impact energy on the pedestrian is absorbed and the impact on the pedestrian's head is reduced. Instead of the pop-up hood, a cowl airbag that cushions a pedestrian's impact by deploying an airbag from the engine hood outside the vehicle body to the lower part of the front window may be used.

  Next, the operation | movement at the time of the collision of the collision detection apparatus 1 for vehicles in this embodiment is demonstrated. When an object such as a pedestrian collides with the front of the vehicle, the bumper cover 7 of the bumper 6 is deformed by an impact caused by the collision with the pedestrian. Subsequently, at the same time as the bumper absorber 8 is deformed while absorbing an impact, the chamber member 2 is also deformed. At this time, the pressure in the chamber space 2 a of the chamber member 2 rises rapidly, and a pressure change is transmitted to the pressure sensor 3.

  The collision detection ECU 5 of the vehicle collision detection device 1 executes a predetermined collision determination process based on the detection result of the pressure sensor 3. In this collision determination process, for example, the effective mass of the collision object is calculated based on the detection results of the pressure sensor 3 and the vehicle speed sensor (not shown), and when this effective mass is larger than a predetermined threshold, the collision with the pedestrian is detected. It is determined that a collision has occurred with a pedestrian that requires the operation of the pedestrian protection device 10 when the vehicle speed is within a predetermined range. Here, the “effective mass” refers to a mass calculated using a relationship between momentum and impulse from a signal detected by the pressure sensor 3 at the time of collision. Specifically, the effective mass is calculated by dividing the interval integral value of the pressure value detected by the pressure sensor 3 at a predetermined time by the vehicle speed. When the collision detection ECU 5 determines that a collision has occurred with a pedestrian that requires the operation of the pedestrian protection device 10, the collision detection ECU 5 outputs a control signal for operating the pedestrian protection device 10 to operate the pedestrian protection device 10. As described above, the impact on the pedestrian is reduced.

  As described above, the vehicle collision detection device 1 according to the first embodiment is disposed on the vehicle front side of the bumper reinforcement 9 in the bumper 6 of the vehicle, and the chamber in which the chamber space 2a is formed. The member 2 and the pressure sensor 3 for detecting the pressure in the chamber space 2 a are provided, and the collision of the object with the bumper 6 is detected based on the pressure detection result by the pressure sensor 3. The chamber member 2 has a non-opposing portion 2c that does not face the front surface 9a of the bumper reinforcement 9, and a portion 4c is connected to the non-opposing portion 2b and the other portion 4d is a rigid member on the vehicle side. The support member 4 fixed to the rear surface 9b of the reinforcement 9 is provided.

  According to this configuration, since the support member 4 is provided in which the portion 4c is connected to the non-opposing portion 2b of the chamber member 2 and the other portion 4d is fixed to the bumper reinforcement 9, the non-chamber of the chamber member 2 is provided. Even if a collision occurs in the facing portion 2b, the non-facing force from the front of the vehicle is not received in two places, that is, the connecting portion between the supporting member 4 and the non-facing portion 2b and the connecting portion between the supporting member 4 and the bumper reinforcement 9. By supporting the facing portion 2b by the support member 4, it is possible to prevent the non-facing portion 2b of the chamber member 2 from being bent toward the vehicle rear side.

  Thereby, even when a collision occurs in a portion where the bumper reinforcement 9 does not exist on the vehicle rear side of the chamber member 2, it is possible to accurately detect the collision, so that the collision detection accuracy of the vehicle collision detection device 1 is improved. Can be made. Furthermore, since it is not necessary to extend the bumper reinforcement 9 in the vehicle width direction in order to ensure the collision detection accuracy, it is possible to save the space of the internal structure of the bumper 6.

  Further, the support member 4 is disposed on the vehicle rear side of the chamber member 2 so as to face the entire non-opposing portion 2b. According to this configuration, since the support member 4 is disposed so as to face the entire non-opposing portion 2b of the chamber member 2, the non-opposing portion 2b of the chamber member 2 is more likely to bend toward the rear of the vehicle during a collision. It can be surely prevented. That is, even if the non-opposing portion 2b of the chamber member 2 receives an external force from the front of the vehicle, the support member 4 is supported by the bumper reinforcement 9 by supporting the non-opposing portion 2b as a whole on the vehicle rear side. Since the chamber member 2 is appropriately deformed and the internal pressure changes, the collision detection accuracy can be maintained.

  Further, the non-opposing portion 2b is a portion that protrudes outward in the vehicle width direction from the vehicle width direction end portion of the bumper reinforcement 9 in the chamber member 2. According to this configuration, when an object such as a pedestrian collides with the left and right end portions of the bumper 6, the support member 4 supports the non-opposing portion 2 b that receives external force from the front of the vehicle. It is possible to prevent the non-opposing portion 2b from bending toward the vehicle rear side, and it is possible to suppress a decrease in collision detection accuracy.

  Further, the support member 4 includes a plate-like main body portion 40 and a thin hinge portion 4b that connects one end 4c of the main body portion 40 to the tip of the non-opposing portion 2b, and is integrally formed with the chamber member 2. The other end of the main body 40 is formed and fixed to the rear surface 9b of the reinforcement 9 which is a rigid member. According to this configuration, by using the support member 4 integrally formed with the chamber member 2, it is not necessary to add another component, and the support member 4 can be disposed while simplifying the manufacturing process. Further, since the support member 4 has the hinge portion 4b, it can be easily bent toward the bumper reinforcement 9 side, and the one end 4c of the main body portion 40 of the support member 4 is connected to the tip of the non-opposing portion 2b. At the same time, the other end 4 d can be fixed to the rear surface 9 b of the bumper reinforcement 9.

  Then, by fixing the other end 4d of the support member 4 to the rear surface 9b of the bumper reinforcement 9 that is a rigid member, the non-opposing portion 2b of the chamber member 2 that receives external force from the front of the vehicle at the time of collision is It can support reliably and the collision detection in the non-opposing part 2b can be performed correctly.

  The support member 4 is disposed along the outer shape of the bumper reinforcement 9. According to this configuration, by disposing the support member 4 along the outer shape of the bumper reinforcement 9, it is possible to ensure a detection range of the chamber member 2 in the vehicle width direction (the vehicle left-right direction).

  The support member 4 is fixed to a bumper reinforcement 9 which is a rigid member by fastening bolts 11. According to this configuration, the support member 4 can be stably fixed to the bumper reinforcement 9 by fastening the bolts 11. Thereby, the tolerance with respect to the external force of the collision detection apparatus 1 for vehicles can be improved.

  Further, the support member 4 has a hole 4a for fastening the bolt 11, and the hole 4a has a long hole shape. According to this configuration, the hole 4a for fastening the bolt 11 is formed into a long hole shape extending in the vehicle width direction, thereby accompanying variation in dimensions of each part and expansion and contraction of the chamber member 2 due to a temperature change. An effect of absorbing deformation and the like can be obtained.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. In FIG. 7, the same parts as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described. In the second embodiment, as shown in FIG. 7, unlike the first embodiment, the support member 41 has a protruding portion 41e. The protrusion 41e has a shape that matches the gap between the support member 41 and the non-facing portion 2b of the chamber member 2.

  The support member 41 is a rectangular plate-like member as in the first embodiment, and has a long hole-shaped hole 41a extending in the vehicle width direction and a thin hinge 41b. 41 c is connected to the end of the chamber member 2, and the other end 41 d is fixed to the rear surface 9 b of the bumper reinforcement 9 by fastening bolts 11.

  According to this configuration, a gap between the support member 41 and the non-facing portion 2b of the chamber member 2 can be eliminated by the presence of the protruding portion 41e. Thus, when an object such as a pedestrian collides with the left and right end portions of the bumper 6, the non-opposing portion 2b of the chamber member 2 that has received an external force from the front of the vehicle is surely secured by the protruding portion 41e of the support member 41. It can support, and it can prevent more reliably that the non-opposing part 2b bends to the vehicle rear side. Thereby, the collision detection accuracy of the vehicle collision detection apparatus 1 can be further improved.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG. In FIG. 8, the same parts as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described. In the third embodiment, as shown in FIG. 8, unlike the first embodiment, the support member 42 is formed as a member different from the chamber member 2. The support member 42 can be made of a material having rigidity higher than that of the chamber member 2. For example, a synthetic resin such as polyethylene having a thickness greater than that of the chamber member 2, a resin having a high hardness, A metal such as aluminum can be used.

  The support member 42 is a rectangular plate-like member and has a long hole 4a extending in the vehicle width direction. The support member 42 has one end 42 c connected to the non-opposing portion 2 b of the chamber member 2 and the other end 42 d fixed to the rear surface 9 b of the bumper reinforcement 9 by fastening bolts 11. The one end 42c of the support member 42 and the non-facing portion 2b of the chamber member 2 are fixed by, for example, heat welding.

  According to this configuration, the support member 42 can be formed of a separate member from the chamber member 2, so that the chamber member 2 and the support member 42 can be formed of separate members having different rigidity. That is, the support member 42 can be formed of a material having higher rigidity than the chamber member 2. Thereby, the non-facing portion 2b of the chamber member 2 that has received an external force from the front of the vehicle at the time of a collision can be reliably supported by the support member 42 having higher rigidity than the chamber member 2, and the non-facing portion 2b can be It can prevent more reliably bending to the side.

  The present invention is not limited to the above-described embodiments, and various modifications or expansions can be made without departing from the spirit of the present invention. For example, in the above embodiment, the support member 4 has a portion 4d fixed to the bumper reinforcement 9, but is not limited thereto, and may be fixed to a rigid member on the vehicle side, for example, a side member. 12 may be fixed.

  Moreover, although the said embodiment demonstrated the case where the non-opposing part 2b was a part which protruded in the vehicle width direction outward rather than the vehicle width direction edge part of the bumper reinforcement 9 in the chamber member 2, it is not restricted to this. However, the present invention can also be applied to the case where the non-facing portion 2b is a portion protruding above the upper end portion of the bumper reinforcement 9 in the chamber member 2. In this case, if a plate-shaped member having an L-shaped cross section is used as the support member 4, one end 4 c of the support member 4 is connected to the non-opposing portion 2 b and the other end 4 d is fixed to the upper surface of the bumper reinforcement 9. Good. Also in this case, the same effect as the above embodiment can be obtained.

  The support member 4 is fixed at two locations (one end 4c and the other end 4d) of the non-opposing portion 2b of the chamber member 2 and the bumper reinforcement 9, but the present invention is not limited to this, and the chamber member 2 The non-opposing portion 2b and the bumper reinforcement 9 may be fixed at a plurality of locations. Furthermore, in the present embodiment, two pressure sensors 3 are arranged on the left and right sides in the vehicle width direction on the rear surface 9b of the bumper reinforcement 9, but the present invention is not limited to this, and in order to improve redundancy, the pressure sensor 3 is provided with a bumper. Three pressure sensors 3 may be provided in the center of the rear surface 9b of the reinforcement 9.

DESCRIPTION OF SYMBOLS 1 Vehicle collision detection apparatus 2 Chamber member 2a Chamber space 2b Non-opposing part 3 Pressure sensor 4, 41, 42 Support member 4a, 41a, 42a Hole 4b, 42b Hinge part 4c, 41c, 42c One end (part)
4d, 41d, 42d The other end (other part)
42e Protruding part 5 Collision detection ECU
6 Bumper 7 Bumper cover 8 Bumper absorber 9 Bumper reinforcement (rigid body member)
9a Front 9b Rear 10 Pedestrian protection device 11 Bolt 12 Side member (rigid member)

Claims (10)

A chamber member (2) which is disposed on the vehicle front side of a bumper reinforcement (9) in a vehicle bumper (6) and has a chamber space (2a) formed therein, and detects a pressure in the chamber space A vehicle collision detection device (1) for detecting a collision of an object with the bumper based on a pressure detection result by the pressure sensor,
The chamber member has a non-opposing portion (2b) that does not face the front surface (9a) of the bumper reinforcement,
Support members (4, 41, 42) in which at least a part (4c, 41c, 42c) is connected to the non-opposing part and the other part (4d, 41d, 42d) is fixed to the rigid member (9) on the vehicle side. A collision detection apparatus for a vehicle, comprising:   The vehicle collision detection device according to claim 1, wherein the support member is arranged to face the entire non-opposing portion on the vehicle rear side of the chamber member.   3. The vehicle collision according to claim 1, wherein the non-opposing portion is a portion of the chamber member that protrudes outward in the vehicle width direction from an end portion of the bumper reinforcement in the vehicle width direction. Detection device.   The support member (4, 41) includes a plate-like main body portion (40) and a thin hinge portion (4b, 41b) that connects one end (4c, 41c) of the main body portion to the tip of the non-opposing portion. And the other end (4d, 41d) of the main body portion is fixed to the rigid body member. Vehicle collision detection device.   The collision detection device for a vehicle according to any one of claims 1 to 3, wherein the support member (42) is formed as a member different from the chamber member. The rigid member is the bumper reinforcement;
The vehicle collision detection device according to any one of claims 1 to 5, wherein the other part of the support member is fixed to a rear surface (9b) of the bumper reinforcement.   The vehicle collision detection device according to claim 6, wherein the support member is disposed along an outer shape of the bumper reinforcement. The support member (41) has a protrusion (41e),
The vehicle according to any one of claims 1 to 7, wherein the protruding portion has a shape that matches a gap between the support member and the non-facing portion of the chamber member. Collision detection device.   The vehicle collision detection device according to any one of claims 1 to 8, wherein the support member is fixed to the rigid member by fastening a bolt (11). The support member has holes (4a, 41a, 42a) for fastening the bolts;
The vehicle collision detection device according to claim 9, wherein the hole has a long hole shape.

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