JP4752850B2 - Vehicle collision detection device - Google Patents

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, for the purpose of protecting pedestrians, in order to protect pedestrians, if an obstacle discriminating device is attached to the vehicle bumper part, it is determined whether or not the collision target is a pedestrian at the time of vehicle collision. Techniques for operating these devices (for example, active hoods and cowl airbags) have been proposed, and their practical application has been studied.

  That is, when the obstacle which collided is not a pedestrian, various bad influences will arise if the protective device (for example, active hood) on a hood is operated. For example, if it cannot be distinguished from a pedestrian when it collides with a lightweight fallen object such as a triangular cone or a signboard under construction, the protection device is activated wastefully and extra repair costs are generated. In addition, if it is indistinguishable from a pedestrian when it collides with a fixed wall such as a concrete wall or a vehicle, the hood will move backward with the hood lifted up, so there is a risk that the hood may enter the passenger compartment and harm the passenger. is there. Thus, it is required to accurately classify whether or not the obstacle is a pedestrian.

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

In response to the collision, the chamber member is deformed and a pressure change occurs in the chamber space. Therefore, the chamber member is formed of a soft material that is easily deformed against a collision.
JP 2006-117157 A

  By the way, in order to detect the pressure in the chamber space with the pressure sensor, it is necessary to insert the pressure introduction pipe of the pressure sensor into the chamber member. Accordingly, the chamber member is formed with an insertion port into which the pressure introducing pipe is inserted. This insertion port is formed by drilling after the chamber member is molded.

  Further, the inner diameter of the insertion port is slightly larger than the outer diameter of the pressure introducing pipe. That is, the chamber space is made non-sealed by providing a slight gap (tolerance). Since this gap acts as a breathing hole, the atmospheric pressure in the chamber space 7a is kept the same as the outside air (atmospheric pressure) in a normal state where no collision occurs.

  Here, since the chamber member is molded from a soft material, the processed surface is easily bent during drilling for forming the insertion port. Therefore, for example, when a drill or the like is used, there is a problem that the machining surface escapes from the drill and the machining accuracy and stability are lowered. In addition, since the machining accuracy is lowered, the diameter of the insertion port is deviated from the initial design value, which may adversely affect the pressure change in the chamber space at the time of collision.

  In addition, the conventional insertion port has a problem that it is difficult for an operator to grasp the position of the insertion port and positioning is difficult at the time of installation regardless of whether or not drilling is performed.

  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 improving the processing accuracy of the insertion opening of the chamber member and maintaining high pressure detection accuracy. And Furthermore, it aims at providing the collision detection apparatus for vehicles which an operator can position easily.

  A vehicle collision detection device according to the present invention includes a sensor main body having a sensor element for pressure detection, a pressure sensor having a pressure introduction pipe for introducing pressure into the sensor main body, and a bumper reinforcement in front of the bumper reinforcement in the vehicle bumper. And a chamber member in which a chamber space is formed and an insertion port into which a pressure introduction tube can be inserted is opened, and the pressure introduction tube of the pressure sensor is inserted into the insertion port of the chamber member. In the vehicle collision detection device configured to detect a pressure in the space and detect a collision with the vehicle bumper based on the pressure detection result, the chamber member includes a protruding portion protruding outward. And the insertion port is provided in the convex portion.

  According to this structure, the chamber member has the convex part which protruded outward from the surface in the location where the insertion port is provided. Due to the shape effect, the convex portion has a higher hardness than the surface of the flat portion of the chamber member and is less likely to bend. The insertion port is formed by drilling using, for example, a drill after the chamber member is molded.

  Therefore, according to the present configuration in which the insertion port is provided in the convex portion, when performing the drilling process in which the insertion port is provided in the chamber member, the object to be processed is difficult to bend and the drilling process is easy. Furthermore, since the convex part protrudes outside, the operation | movement which aims at tools, such as a drill, becomes easy. Moreover, it can also process, fixing a convex part with a jig | tool etc. FIG. As described above, when the insertion port is processed, it is possible to prevent the position of the drill or the like from being fixed due to distortion of the target surface. The material used for the chamber member is soft, such as LDPE (low density polyethylene) or PP (polypropylene).

  And according to this structure, positioning becomes easy in installation operation | work irrespective of the presence or absence of drilling. For example, even when the insertion port is formed at the time of molding the chamber member, positioning is facilitated by providing the insertion port on the convex portion protruding outward.

  As described above, according to the vehicle collision detection device of the present invention, stable drilling can be performed, and the processing accuracy of the insertion port can be improved. As a result, the gap between the insertion port and the pressure introduction tube functions as a breathing hole, and the pressure detection accuracy can be maintained with high accuracy. Moreover, positioning becomes easy.

  Here, it is preferable that the convex portion has a protruding end surface, and the insertion port is provided on the protruding end surface. That is, the projecting end portion of the projecting portion is planar, and the planar projecting end surface is provided with an insertion port. Due to the shape effect, the projecting end surface is less likely to bend and has a planar shape.

  Here, the convex portion is preferably cylindrical. Thereby, it becomes easy to mold the convex portion. For example, in the case of a prismatic shape, if it is molded by a normal method, the thickness of the corner portion becomes thin, and the strength cannot be secured. On the other hand, if it is cylindrical, the convex part with intensity | strength can be shape | molded easily. The cylinder includes an elliptic cylinder.

  Furthermore, it is preferable that the diameter of the protruding end surface is formed to be not more than 5 times the diameter of the insertion port. The smaller the diameter of the protruding end surface, the more difficult it is to bend. Therefore, by setting it as the said structure, the bending of a protrusion end surface can be prevented reliably and the processing precision of a drilling process can be improved. In addition, naturally the diameter of a protrusion end surface is larger than the diameter of an insertion port. When the protruding end surface is an ellipse, the average value of the lengths of the major axis and the minor axis can be considered as the diameter of the protruding end surface. In this case, the same effect as described above can be obtained.

  Here, when the convex portion protrudes upward from the upper surface of the chamber member, the protruding end surface is preferably an inclined surface. The chamber member may get wet when rainwater or the like enters the bumper. Here, when the convex portion protrudes upward, the insertion port provided in the protruding end surface opens upward. That is, the gap between the pressure introducing pipe and the insertion opening opens upward. Accordingly, when water droplets accumulate on the protruding end surface, there is a possibility that the water droplets may enter the chamber member even from a slight gap.

  However, according to the above configuration, since the protruding end surface is an inclined surface, water droplets on the protruding end surface easily flow along the inclination to the edge of the protruding end surface or outside the protruding end surface. That is, it is difficult for water droplets to accumulate on the protruding end surface. Since the gap is originally a slight gap, it is difficult for water droplets to enter unless water droplets accumulate on the protruding end surface. Therefore, it is possible to prevent water droplets from entering the chamber member from the outside by making the projecting end surface an inclined surface. Thereby, pressure detection accuracy can be maintained.

  In addition, when the convex portion projects upward from the upper surface of the chamber member as described above, the projecting end surface has a lower portion as it goes from the periphery of the insertion port to the edge portion toward the outer side in the radial direction of the insertion port. An inclined portion inclined so as to be formed may be formed. Thereby, the water droplet on the projecting end surface easily flows toward the edge of the projecting end surface. That is, the water droplet on the protruding end surface always flows in the direction away from the insertion port due to the inclined portion. Accordingly, it is possible to prevent water droplets from entering the chamber member. However, the inclined surface is easier to process and more productive than the inclined portion.

  According to the vehicle collision detection device of the present invention, it is possible to improve the processing accuracy of the insertion port and maintain high pressure detection accuracy. In addition, positioning during installation is facilitated.

  Hereinafter, an embodiment of a vehicle collision detection device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view schematically showing a vehicle collision detection apparatus 1 according to an embodiment of the present invention, and FIG. 2 is a side view thereof. FIG. 3 is a view showing the chamber member 7 from the front side of the vehicle. FIG. 4 is a view showing the convex portion 73 from above. FIG. 5 is a schematic perspective view of the bracket 9. FIG. 6 is a view showing the attachment state of the pressure sensor 8 from the front side of the vehicle.

  As shown in FIG. 1, the vehicle collision detection device 1 of the present embodiment includes a chamber member 7 disposed in the vehicle bumper 2, a pressure sensor 8, and a pedestrian protection device electronic control unit (hereinafter referred to as electronic control). The 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, and a chamber member 7. In FIG. 2, the bumper cover 3, the bumper reinforcement 4, the absorber 6, and the chamber member 7 are shown in cross section.

  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. .

  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 positioned in the vicinity of the left and right side surfaces of the vehicle and extend in the vehicle front-rear direction, and the bumper reinforcement 4 described above is attached to the front end 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 synthetic resin member that extends in the vehicle width direction and is attached to the upper side of the bumper reinforcement front surface 4a in the bumper cover 3, and is surrounded by a wall having a thickness of several millimeters. A substantially sealed chamber space 7a is formed.

  More specifically, the chamber member 7 includes a main body portion 71 and an extending portion 72. The main body 71 is a portion disposed in front of the bumper reinforcement front surface 4a, and extends in the vehicle width direction. The extending portion 72 is a portion extending from the central portion in the vehicle width direction on the upper surface of the main body portion 71 toward the rear and upper sides of the vehicle. In other words, the extending portion 72 is a portion in which a part of the chamber member 7 in the vehicle width direction extends to the vehicle rear side and the bumper reinforcement upper surface 4b from the bumper reinforcement front surface 4a. The internal space of the extending portion 72 communicates with the internal space of the main body portion 71 and forms a part of the chamber space 7a. As shown in FIG. 1, the extending portion 72 is provided at a central portion between the side members 5 and 5 in the vehicle width direction.

  Here, as shown in FIGS. 2 and 3, a convex portion 73 protruding in a columnar shape upward from the upper surface is formed at a rear portion of the extending portion 72. The convex portion 73 has a hollow shape having a protruding end surface 73 a and a side surface 73 b, and the inside communicates with the inside of the extending portion 72. The protruding end surface 73a is an end surface in the protruding direction (upward) of the convex portion 73 and has a circular shape. The side surface 73b has a cylindrical shape and protrudes substantially vertically from the upper surface of the extending portion 72.

  As shown in FIG. 4, an insertion port 73c is provided at the center of the protruding end surface 73a. The insertion port 73c is circular and opens upward. As for the approximate dimensions of the convex portion 73 in this embodiment, the protruding height is about 10 mm, the diameter of the protruding end surface 73a is about 15 mm, and the diameter of the insertion port 73c is about 5 mm. Here, the diameter of the protruding end surface 73a is approximately three times the diameter of the insertion port 73c. The insertion port 73c is located above the bumper reinforcement upper surface 4b.

  The special-shaped chamber member 7 having the extending portion 72 and the convex portion 73 is formed by blow molding. The chamber member 7 of the present embodiment can be more easily manufactured by blow molding using, for example, LDPE (low density polyethylene) as a raw material. And after blow molding, in order to form the insertion port 73c in the protrusion end surface 73a of the convex-shaped part 73, the drilling process using a drill is performed.

  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 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 73 c provided in the extending portion 72 of the chamber member 7. That is, the pressure introducing pipe 82 is inserted downward, and the inlet for introducing pressure faces downward. A slight gap (for example, about 0.1 to 1.5 mm) is formed between the inner circumference of the insertion port 73c and the outer circumference of the pressure introduction pipe 82, and this gap acts as a breathing hole. In a normal state in which no occurrence occurs, the atmospheric pressure in the chamber space 7a is kept the same as the outside air (atmospheric pressure).

  Here, in the present embodiment, the pressure sensor 8 is fixed to the bumper reinforcement upper surface 4 a via a bracket 9. As shown in FIG. 3, the bracket 9 includes installation portions 91 and 92, upright portions 93 and 94, and a fixing portion 95. The installation portions 91 (92) are plate-like portions that are both ends in the longitudinal direction of the bracket 9 and are substantially parallel to the bumper reinforcement upper surface 4a, and have through holes 91a (92a). The upright portion 93 is a plate-like portion extending vertically upward from the end portion of the installation portion 91 on the installation portion 92 side. The upright portion 94 is a plate-like portion extending vertically upward from the end portion of the installation portion 92 on the installation portion 91 side.

  The fixing portion 95 is a plate-like portion that extends between the upper end of the upright portion 93 and the upper end of the upright portion 94. That is, the bracket 9 is formed in a bridge shape including the installation portions 91 and 92, the upright portions 93 and 94, and the central fixing portion 95. The fixing portion 95 has a through hole 95c into which the pressure introducing pipe 82 can be inserted at the center, and through holes 95a and 95b for fixing bolts are provided on both sides of the through hole 95c. The sensor main body 81 is bolted to the upper surface of the fixing portion 95. The bracket 9 is bolted to the bumper reinforcement upper surface 4b via a through hole 91a (92a).

  On the other hand, the extending portion 72 of the chamber member 7 is disposed between the upright portions 93 and 94 of the bracket 9 and between the fixing portion 95 and the bumper reinforcement upper surface 4b. That is, the bracket 9 has a structure in which the sensor body 81 is fixed to the upper surface of the fixing portion 95 while being fixed to the bumper reinforcement upper surface 4 b so as to straddle the extended portion 72.

  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. In addition to the pressure detection result in the pressure sensor 8, a vehicle speed detection result from a vehicle speed sensor (not shown) is input to the pedestrian protection device ECU 10, and a pedestrian collision is determined based on the pressure detection result and the vehicle speed detection result. It is preferable to configure as described above.

  Here, the effect in this embodiment is demonstrated. As described above, the chamber member 7 is manufactured by blow molding and drilling. After blow molding, the insertion port 73c is formed by drilling with a drill. In the present embodiment, the insertion port 73 c is provided on the protruding end surface 73 a of the convex portion 73. That is, the target surface for drilling (drilling) is the protruding end surface 73 c of the convex portion 73. The protruding end surface 73a has a smaller surface area than the upper surface of the extended portion 72, and has a high hardness and is difficult to bend due to the shape effect.

  Thereby, in the drill process performed on the protrusion end surface 73a, the object surface is difficult to bend and the escape of the drill is suppressed. Furthermore, since the convex part 73 protrudes upward from the upper surface of the extension part 72, the operation | movement which aims at a drill becomes easy. Moreover, it can also process, fixing the side surface 73b of the convex part 73 with a jig | tool etc. FIG. Thus, according to the present embodiment, when the insertion port 73c is processed, it is possible to prevent the position of the drill or the like from being fixed due to distortion of the target surface. This effect is more clearly exhibited because the diameter of the protruding end surface 73a is not more than 5 times the diameter of the insertion port 73c.

  Moreover, since the convex part 73 is cylindrical, the convex part 73 which maintained intensity | strength can be easily shape | molded by blow molding. As described above, since the drilling is easy, the processing accuracy of the insertion port 73c is improved. The breathing hole (tolerance) is also as designed, and high pressure detection accuracy can be maintained.

  As another effect in the present embodiment, the pressure sensor 8 is disposed on the rear side of the vehicle and on the upper side of the upper end of the bumper reinforcement front surface 4a. The attachment work can be performed in a relatively free space without working in a narrow work area in the ment 4. That is, the workability of the mounting work is improved.

  In addition, since the pressure sensor 8 is connected to the extended portion 72 extending from the main body portion 71 of the chamber member 7 to the vehicle rear side, the stroke of the main body portion 71 is not reduced, and the chamber A sufficient stroke (width in the vehicle front-rear direction) can be ensured for the member 7 and the absorber 6. Therefore, even if the vehicle has a small front space or a vehicle with a small stroke of the absorber 6, high collision detection accuracy can be exhibited.

  Furthermore, since the pressure sensor 8 is arranged behind the vehicle front side of the bumper reinforcement 4a, the bumper reinforcement 4 protects the pressure sensor 8 against a collision from the front, and more reliable collision detection is possible. And Further, since the pressure introduction to the pressure sensor 8 is performed by the extending portion 72, the pressure sensor 8 is less susceptible to so-called air column resonance caused by air vibration in the chamber space 7a, and the pressure detection accuracy is improved.

  The width of the extending portion 72 in the vehicle width direction is smaller than the width of the bumper reinforcement 4 in the vehicle width direction, and work and installation space is secured above the bumper reinforcement 4. Since the extended portion 72 is located at the center of the chamber member 7 in the vehicle width direction, a work space and an installation space can be secured on both sides of the bumper reinforcement 4 in the vehicle width direction. Furthermore, since there is this installation space, the bracket 9 can be fixed to the bumper reinforcement upper surface 4b so as to straddle the extended portion 72, and the sensor main body 81 can be fixed to the upper surface of the bracket 9. That is, workability is improved, and the extended portion 72 can be positioned and space can be saved.

  Even when condensation occurs in the pressure introduction pipe 82, the pressure introduction pipe 82 is inserted downward, so that water droplets can be dropped by gravity. In this way, condensation or the like that hinders the introduction of pressure can be eliminated, and a reduction in detection accuracy of the pressure sensor 8 can be prevented.

  Needless to say, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. A modification is given below. However, the convex portion 73 is deformed in the first modified example and the second modified example, and the chamber member 7 is mainly deformed in the third modified example.

<First modification>
A first modification will be described with reference to FIG. FIG. 7 is a schematic side view showing a first modification in which the bracket 9 is omitted. As shown in FIG. 7, in the first modification, the protruding end surface 73a of the convex portion 73 is an inclined surface. Specifically, the protruding end surface 73a is inclined by approximately 15 degrees with respect to a horizontal plane (vehicle contact surface) so that the front side of the vehicle is downward. The insertion port 73 c is provided at the center of the protruding end surface 73.

  According to this, similarly to the above, when drilling to form the insertion port 73c, the target surface (projecting end surface 73a) is difficult to bend, and the processing accuracy is improved. Furthermore, since the protruding end surface 73a is an inclined surface, it is difficult for water droplets to accumulate on the protruding end surface 73a. Therefore, it is possible to prevent water droplets from entering the chamber member 7 through the gap (breathing hole) between the insertion port 73c and the pressure introducing pipe 82. Further, the shape of the convex portion 73 can be easily molded without being complicated.

  In addition, the protrusion end surface 73a should just be an inclined surface inclined so that one may become downward, for example, you may incline so that the vehicle rear side may become downward. Further, the inclination angle is preferably 5 degrees or more. Thereby, the said effect can be exhibited more reliably.

<Second modification>
A second modification will be described with reference to FIG. FIG. 8 is a schematic perspective view showing the convex portion 73 of the second modified example. As shown in FIG. 8, the projecting end surface 73 a of the second modification is inclined so as to extend from the circular flat surface portion 731 and the edge of the flat surface portion 731, and to become downward as it goes outward in the radial direction of the flat surface portion 731. And an inclined portion. The diameter of the flat surface portion 731 is substantially the same as the diameter of the insertion port 73c. That is, after drilling, the flat surface portion 731 has only a circular edge.

  The water droplet flows away from the insertion port 73 c by the inclined portion 732. Therefore, it is possible to more reliably prevent water droplets from entering the chamber member 7. However, as compared with the first modification, the shape of the convex portion 73 is complicated, and the narrow flat portion 731 must be drilled. That is, with respect to workability and workability, the first modification is better.

<Third modification>
A third modification will be described with reference to FIG. FIG. 9 is a schematic side view showing a third modification. In the third modification, the extending portion 72 of the chamber member 7 extends toward the inside of the bumper reinforcement 4. The extending portion 72 is provided with a convex portion 73 that protrudes from the rear end surface to the vehicle rear side. The shape of the convex part 73 is the same as that of this embodiment. The protruding end surface 73a faces the vehicle rear side, and the insertion port 73c opens to the vehicle rear side. Even in this case, drilling is facilitated, and the processing accuracy of the insertion port 73c is improved. Further, when the extending portion 72 is not provided, the convex portion 73 may be provided on the surface of the chamber member 7 (main body portion 72). This also has the same effect as described above.

It is a top view seeing through the inside of the vehicle bumper carrying the collision detection device for vehicles of one embodiment of the present invention. It is a side view which sees through and shows the inside of a vehicle bumper carrying a collision detection device for vehicles of one embodiment. It is the figure which showed the chamber member 7 from the vehicle front side. It is the figure which showed the convex-shaped part 73 from upper direction. 3 is a schematic perspective view of a bracket 9. FIG. It is the figure which showed the attachment state of the pressure sensor 8 from the vehicle front side. It is a side view seeing through the inside of the vehicle bumper carrying the vehicle collision detection device of the 1st modification. It is a perspective view which shows the convex-shaped part 73 of a 2nd modification. It is a side view seeing through the inside of the vehicle bumper carrying the vehicle collision detection device of the 3rd modification.

Explanation of symbols

1: vehicle collision detection device, 2: vehicle bumper,
4: Bumper reinforcement, 4a: Front surface, 4b: Upper surface 7: Chamber member, 71: Main body portion, 72: Extension portion,
73: convex portion, 73a: protruding end surface, 73b: side surface, 73c: insertion port,
7a: chamber space,
8: Pressure sensor, 81: Sensor body, 82: Pressure introducing pipe,
9: Bracket, 10: Pedestrian protection device ECU

Claims (6)

A sensor main body having a sensor element for pressure detection, a pressure sensor having a pressure introduction pipe for introducing pressure into the sensor main body, a front surface of a bumper reinforcement in a vehicle bumper, and a chamber space inside And a chamber member having an insertion port into which the pressure introduction tube can be inserted, and the pressure introduction tube of the pressure sensor is inserted into the insertion port of the chamber member. In the vehicle collision detection device configured to detect pressure and detect a collision with the vehicle bumper based on the pressure detection result,
The chamber member has a convex portion projecting outwardly,
The vehicular collision detection device, wherein the insertion port is provided in the convex portion. The convex portion has a protruding end surface;
The vehicle collision detection device according to claim 1, wherein the insertion port is provided on the protruding end surface of the convex portion.   The vehicle collision detection device according to claim 2, wherein the convex portion has a cylindrical shape.   The vehicle collision detection device according to claim 3, wherein a diameter of the protruding end surface is formed to be not more than 5 times a diameter of the insertion port. The convex portion protrudes upward from the upper surface of the chamber member,
The collision detection device for a vehicle according to any one of claims 2 to 4, wherein the protruding end surface is an inclined surface. The convex portion protrudes upward from the upper surface of the chamber member,
5. The slanted portion is formed on the protruding end surface so as to be inclined downwardly from the periphery of the insertion port to the edge thereof toward the outer side in the radial direction of the insertion port. The vehicle collision detection device according to claim 1.

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