JP7431060B2 - Collision detection device - Google Patents

Description

The present invention relates to a collision detection device, and particularly to a collision detection device disposed in front of a bumper beam of a vehicle.

In recent years, collision detection devices have appeared that detect a collision when an object collides with the front of a vehicle. Such a collision detection device has a shock absorbing section and a shock detecting section disposed on the front side of a bumper beam of a vehicle.The shock absorbing section absorbs the impact of the collision, and the impact detecting section detects the impact of the collision. Based on the impact detected by the impact detection section, an airbag provided at the front of the vehicle is inflated and deployed. As a result, the airbag protects the collision object.

Such an impact detection unit has a problem in that the airbag deploys even in the case of a small animal other than the object to be protected, which obstructs the driver's field of vision. For this reason, there is a need to distinguish and detect collided objects at the time of collision.

As a technique for detecting this distinction, for example, Patent Document 1 proposes a collision detection device for a vehicle that prevents erroneous collision determination from being performed. This collision detection device for a vehicle has a chamber member in which a pressure sensor is disposed in an internal space, and a surface of the chamber member on the vehicle front side is an inclined surface with a normal line facing diagonally upward. As a result, in the case of a light collision, the external force applied to the chamber member is significantly reduced, so that the impact caused by a collision with a person and the impact caused by a collision with a light collision object can be detected separately.

Further, Patent Document 2 describes a pedestrian collision detection device that can accurately detect a collision between a vehicle and a pedestrian. Specifically, in Patent Document 2, the amount of deformation of the pressure chamber is controlled by forming thick parts on the upper and lower surfaces of the pressure chamber that detects a collision, and the accuracy of collision detection using the deformation of the pressure chamber is improved. can be improved.

JP2009-214845A Japanese Patent Application Publication No. 2011-246075

However, the collision detection device described above has room for improvement from the viewpoint of improving collision detection accuracy.

Specifically, collisions that occur against the front of a vehicle include a pedestrian collision in which a pedestrian collides with the front of the vehicle, and a minor collision in which an object other than a pedestrian, such as a small animal, collides with the front of the vehicle. including. The direction in which the impact is applied to the collision detection unit is different when a pedestrian collision occurs and when a minor collision occurs, but the collision detection devices described in the above-mentioned patent documents clearly distinguish and detect the two. It wasn't easy to do.

Furthermore, in order to distinguish between a pedestrian collision and a light collision and detect them, it is also possible to arrange a spacer between the bumper face and the collision detection section, which has different deformation characteristics for a pedestrian collision and a light collision. However, when a pedestrian collision occurs, the spacer remains crushed, making it difficult to sufficiently protect the pedestrian from the impact.

The present invention has been made in view of such problems, and an object of the present invention is to provide a collision detection device that can clearly distinguish and detect pedestrian collisions and minor collisions. .

The collision detection device of the present invention includes a shock absorbing portion that extends along the vehicle width direction between a bumper face and a bumper beam of a vehicle, and absorbs impact by deforming when the vehicle collides; a collision detection section that extends along the vehicle and deforms when the vehicle collides to detect that the collision has occurred, and at least a lower portion of the collision detection section is connected to the shock absorption section. The lower part of the collision detecting part is made of the same material as the shock absorbing part, and the upper part of the collision detecting part is made of a material that is more flexible than the shock absorbing part.

The collision detection device of the present invention includes a shock absorbing portion that extends along the vehicle width direction between a bumper face and a bumper beam of a vehicle, and absorbs impact by deforming when the vehicle collides; a collision detection section that extends along the vehicle and deforms when the vehicle collides to detect that the collision has occurred, and at least a lower portion of the collision detection section is connected to the shock absorption section. The collision detection section has a lower surface section, a front surface section, and an upper surface section, and the lower surface section is made of the same hard material as the shock absorbing section, and the collision detection section has a lower surface section, a front surface section, and an upper surface section. The lower surface portion is made of a softer material than the lower surface portion.

The collision detection device of the present invention is characterized in that the impact absorbing section is made of a synthetic resin plate.

In the collision detection device of the present invention, the collision detection section is arranged between the front surface of the shock absorbing section and the bumper face.

The collision detection device of the present invention is characterized in that the collision detection section is tube-shaped.

The collision detection device of the present invention is characterized in that the collision detection section is formed on the front surface of the shock absorption section.

The collision detection device of the present invention is characterized in that the collision detection section is formed at an upper end of the shock absorption section.

The collision detection device of the present invention includes a shock absorbing portion that extends along the vehicle width direction between a bumper face and a bumper beam of a vehicle, and absorbs impact by deforming when the vehicle collides; a collision detection section that extends along the vehicle and deforms when the vehicle collides to detect that the collision has occurred, and at least a lower portion of the collision detection section is connected to the shock absorption section. The lower part of the collision detecting part is made of the same material as the shock absorbing part, and the upper part of the collision detecting part is made of a material that is more flexible than the shock absorbing part. According to the present invention, the stress in the front-rear direction of the lower portion of the collision detection section can be increased, and the amount of deformation of the collision detection section in the event of a light collision can be further reduced.

The collision detection device of the present invention includes a shock absorbing portion that extends along the vehicle width direction between a bumper face and a bumper beam of a vehicle, and absorbs impact by deforming when the vehicle collides; a collision detection section that extends along the vehicle and deforms when the vehicle collides to detect that the collision has occurred, and at least a lower portion of the collision detection section is connected to the shock absorption section. The collision detection section has a lower surface section, a front surface section, and an upper surface section, and the lower surface section is made of the same hard material as the shock absorbing section, and the collision detection section has a lower surface section, a front surface section, and an upper surface section. The lower surface portion is made of a softer material than the lower surface portion. According to the present invention, the lower surface of the collision detection part of the present invention is made of a hard part, thereby reducing the amount of deformation of the collision detection part when a light collision occurs, and the front and upper surfaces of the collision detection part By being made of a soft part, the amount of deformation of the collision detection part when a pedestrian collision occurs is increased.

The collision detection device of the present invention is characterized in that the impact absorbing section is made of a synthetic resin plate. According to the present invention, by configuring the lower part of the collision detection part with the same material as the synthetic resin plate, the stress in the longitudinal direction of the lower part of the collision detection part is further increased, and the collision detection part in the event of a light collision is The amount of deformation can be further reduced.

In the collision detection device of the present invention, the collision detection section is arranged between the front surface of the shock absorbing section and the bumper face. According to the present invention, since the collision detection section is favorably deformed between the bumper face and the shock absorbing section, it is possible to favorably distinguish and detect a pedestrian collision and a light collision.

The collision detection device of the present invention is characterized in that the collision detection section is tube-shaped. According to the present invention, a collision can be accurately detected by the collision detection section of the tube portion.

The collision detection device of the present invention is characterized in that the collision detection section is formed on the front surface of the shock absorption section. According to the present invention, since the collision detection section is formed on the front surface of the impact absorption section, the collision detection section can clearly distinguish and detect a pedestrian collision and a minor collision.

The collision detection device of the present invention is characterized in that the collision detection section is formed at an upper end of the shock absorption section. According to the present invention, since the collision detection section is formed at the upper end of the shock absorption section, it is possible to more clearly distinguish and detect a pedestrian collision and a minor collision.

1 is a diagram showing a vehicle equipped with a collision detection device according to an embodiment of the present invention, (A) is a perspective view showing the front part of the vehicle, and (B) is an exploded perspective view showing the collision detection device etc. . 1 is a diagram showing a collision detection device according to an embodiment of the present invention, (A) is a side sectional view showing the collision detection device, and (B) is an enlarged view of a portion where a collision detection section is formed. FIG. FIG. 1 is a block diagram showing a connection configuration of a collision detection device according to an embodiment of the present invention. 1 is a diagram showing a collision detection device according to an embodiment of the present invention, (A) is a side sectional view showing the behavior of the collision detection device when a pedestrian collision occurs, and (B) is a collision detection unit It is a side sectional view showing the deformation state in detail. 1 is a diagram showing a collision detection device according to an embodiment of the present invention, (A) is a side sectional view showing the behavior of the collision detection device when a light collision occurs, and (B) is a side sectional view of the collision detection unit. It is a side sectional view showing the deformation situation in detail.

Hereinafter, a collision detection device 11 according to an embodiment of the present invention will be described in detail based on the drawings. In the following description, directions such as front, rear, top, bottom, left, and right will be used, but left and right mean left and right when the vehicle 10 is viewed from the front. In the following description, a phenomenon in which a pedestrian collides with the front of the vehicle 10 is referred to as a pedestrian collision, and a phenomenon in which a small animal other than a pedestrian collides with the front of the vehicle 10 is referred to as a minor collision.

FIG. 1(A) is a perspective view showing the front part of the vehicle, and FIG. 1(B) is an exploded perspective view showing a collision detection device and the like.

Referring to FIG. 1(A), the front design portion of vehicle 10 is composed of, from above, a front hood 12, a grille 16, and a bumper face 14. The members constituting the collision detection device 11 of this embodiment are provided behind the grille 16 or the bumper face 14. When the collision detection device 11 detects that the vehicle 10 has collided with a pedestrian, the ECU 20 (described later) inflates and deploys an airbag 22 (not shown) disposed near the front hood 12, thereby causing a secondary collision of the pedestrian. protect from Additionally, the pop-up hood 23 (not shown) operates, and the rear portion of the front hood 12 is lifted upward, reducing the impact on the pedestrian's head. Here, both the airbag 22 and the pop-up hood 23 may be employed, or either one may be employed.

Referring to FIG. 1(B), collision detection device 11 extends along the width direction of vehicle 10 between bumper face 14 and bumper beam 13 of vehicle 10, and deforms when vehicle 10 collides. The vehicle includes a shock absorbing part 17 that absorbs shock, and a collision detection part 15 that extends along the width direction of the vehicle 10 and deforms when the vehicle 10 collides, thereby detecting that a collision has occurred. Furthermore, in the collision detection device 11 , at least the lower portion of the collision detection section 15 is integrated with the shock absorption section 17 . In other words, the collision detection device 11 does not have a separate tube-shaped or chamber-shaped detection device section included in a general detection device, and at least a portion of the collision detection section 15 is formed from the shock absorption section 17. ing.

The shock absorber 17 is made of a highly rigid synthetic resin plate made of PP (polypropylene) or the like. The shock absorber 17 will be described later with reference to FIG. 2(A).

The collision detection section 15 is disposed at the upper end of the front surface of the shock absorption section 17 and is integrated with the front surface of the shock absorption section 17 . As will be described later, the lower part of the collision detection section 15 is made of the same material as the shock absorption section 17. The collision detection unit 15 is deformed so as to be crushed when a pedestrian collision or a minor collision occurs, and a detection device 18, which will be described later, detects a pedestrian collision or a minor collision by sensing the amount of deformation of the collision detection unit 15. are doing. Specifically, a detection device 18 (to be described later) detects changes in the internal pressure of the collision detection unit 15 and changes in the flow rate and flow rate of air released from the collision detection unit 15 to the outside, thereby detecting the collision detection unit 15. sensing the amount of deformation. Here, as the detection device 18, for example, pressure sensors arranged at both ends of the collision detection section 15 can be employed.

The bumper beam 13 is a cylindrical member that extends in the width direction of the vehicle and has a substantially rectangular cross section made of a metal plate, and has the role of supporting the shock absorbing portion 17 and the like and absorbing energy in the event of a major collision. In the event of a pedestrian collision or a minor collision, the bumper beam 13 does not deform in principle and supports the collision detection device 11 from behind.

FIG. 2(A) is a side sectional view showing the collision detection device 11, and FIG. 2(B) is an enlarged side sectional view showing a portion where the collision detection section 15 is formed.

Referring to FIG. 2(A), collision detection section 15 is formed near the upper end of the front surface of impact absorption section 17. As shown in FIG. Further, the collision detection section 15 is disposed between the bumper face 14 and the front end of the shock absorption section 17. Further, the collision detection section 15 is formed on the front surface of the shock absorption section 17 at or near the upper end.

The shock absorbing portion 17 includes a horizontal member 171 whose cross section extends horizontally, and a vertical member 172 whose cross section extends vertically. The horizontal member 171 is arranged at the top of the shock absorbing section 17. A plurality of vertical members 172 extend downward from the lower surface of the horizontal member 171.

Referring to FIG. 2(B), the collision detection unit 15 has a lower surface portion 151, a front surface portion 152, and an upper surface portion 153, and forms a closed cross section. Further, the rear surface of the collision detection section 15 is formed by a vertical member 172 of the shock absorption section 17 . Here, the lower part of the collision detection part 15 is made of the same material as the impact absorption part 17, and the upper part of the collision detection part 15 is made of a material that is more flexible than the impact absorption part 17.

Specifically, the lower portions of the lower surface portion 151 and the front portion 152 are formed from a hard portion 155 that is more rigid than the soft portion 154. The hard part 155 is made of PP or the like similar to the impact absorbing part 17, and does not easily deform when a light collision occurs. Furthermore, since the lower surface portion 151 is a plate-like member extending substantially perpendicularly toward the front, the lower surface portion 151 has a shape that is subjected to large stress against input from the front and is not easily deformed by such input.

The upper portions of the upper surface portion 153 and the front portion 152 are formed from a soft portion 154 having low rigidity. As the soft portion 154, a soft elastomer material such as TPO (olefin elastomer) can be used. TPO is suitable as a material for the soft portion 154 because it has excellent moldability. Furthermore, other soft materials such as rubber may be used as the soft portion 154. The front surface portion 152 and the upper surface portion 153 comprising the soft portion 154 have a substantially hook shape extending downward toward the front, so that the stress against input directed downward to the rear side is small, and the shape can be easily deformed by such input. There is.

The hard part 155 and the soft part 154 are formed by two-color molding, for example, so they are firmly joined, and air leaks outside from the boundary between them in the event of a pedestrian collision or a light collision. There's nothing to do.

Although the boundary between the soft portion 154 and the hard portion 155 is formed approximately at the center of the front portion 152, the boundary may be located elsewhere. For example, the boundary between the soft portion 154 and the hard portion 155 may be located at the lower end of the front surface portion 152, or may be located at an intermediate portion of the lower surface portion 151 in the front-rear direction.

FIG. 3 is a block diagram showing the connection configuration of the collision detection device 11. The collision detection device 11 includes an ECU 20, a detection device 18, a speed sensor 19, an airbag 22, a pop-up hood 23, and a notification device 25.

The ECU 20 is an arithmetic control unit that includes a CPU 21 and a RAM 24, and has an output terminal and an input terminal. A detection device 18 and a speed sensor 19 are connected to an input terminal of the ECU 20. An airbag 22, a pop-up hood 23, and a notification device 25 are connected to an output terminal of the ECU 20. The ECU 20 executes predetermined arithmetic processing based on input information input from the detection device 18, the speed sensor 19, etc., and outputs output signals for controlling the operations of the airbag 22, pop-up hood 23, notification device 25, etc. Output.

As described above, the detection device 18 inputs an electric signal corresponding to the internal pressure of the collision detection section 15 to the ECU 20. The ECU 20 determines that a pedestrian collision has occurred if the internal pressure change of the collision detection unit 15 detected by the detection device 18 is above a certain value, and determines that a minor collision has occurred if the pressure change is less than a certain value.

The speed sensor 19 inputs an electric signal indicating the traveling speed of the vehicle 10 to the ECU 20 based on the number of rotations of the tires and the like. The ECU 20 inflates and deploys the airbag 22 and activates the pop-up hood 23 in order to protect the pedestrian when a pedestrian collision occurs when the traveling speed of the vehicle 10 detected by the speed sensor 19 is below a certain level.

The airbag 22 and the pop-up hood 23 are as described with reference to FIG. 1, and the airbag 22 is inflated and deployed based on instructions from the ECU 20 in order to protect pedestrians when a pedestrian collision occurs. , the pop-up hood 23 is displaced in a raised manner.

The notification device 25 notifies the occupants of the vehicle 10 that a pedestrian collision or a minor collision has occurred by performing a specific display or sound.

The behavior of the collision detection device 11 when a pedestrian collision or a minor collision occurs will be described with reference to FIGS. 4 and 5. FIG. 4 shows the behavior of the collision detection device 11 when a pedestrian collision occurs, and FIG. 5 shows the behavior of the collision detection device 11 when a minor collision occurs.

With reference to FIG. 4, the behavior of the collision detection device 11 when a pedestrian collision occurs will be described. FIG. 4(A) is a side cross-sectional view showing the behavior of the collision detection device 11 when a pedestrian collision occurs, and FIG. 4(B) is a side cross-sectional view showing the deformation state of the collision detection unit 15 in detail. It is. Here, in order to simplify the drawing, the bumper face 14 and grille 16 shown in FIG. 2(A) are not shown.

Referring to FIG. 4(A), when a pedestrian collision occurs in which a pedestrian 26 collides with the front of the vehicle 10, the bumper face 14 and grille 16 shown in FIG. 2(A) are deformed toward the rear. do. Furthermore, the impact absorbing section 17 and the collision detecting section 15 deform toward the rear. In particular, by deforming the impact absorbing portion 17, impact energy is absorbed, and the impact applied to the legs of the pedestrian can be alleviated.

When a pedestrian collision occurs, the collision detection section 15 is compressed and deformed significantly. Thereby, with reference to FIG. 3, the ECU 20 detects a pedestrian collision based on the amount of deformation of the collision detection unit 15 detected by the detection device 18, such as the amount of pressure change or the amount of air discharged, exceeding a certain value. Detects the occurrence of.

In response, the ECU 20 inflates and deploys the airbag 22 shown in FIG. 3, and also operates the pop-up hood 23. Thereby, the pedestrian 26 is received by the airbag 22 and the pop-up hood 23, and the pedestrian 26 can be effectively protected. Furthermore, the ECU 20 uses the notification device 25 to notify the occupant that a pedestrian collision has occurred.

Referring to FIG. 4(B), when a pedestrian collision occurs, the amount of compression deformation of collision detection section 15 increases. When a pedestrian collision occurs, the impact applied to the collision detection unit 15 from the pedestrian 26 is directed downward and backward, as indicated by the arrow. Therefore, the front surface portion 152 and the upper surface portion 153 comprising the soft portion 154 are largely compressed and deformed toward the lower rear. On the other hand, the amount of deformation of the lower surface portion 151 made of the hard portion 155 is small. Therefore, the internal pressure of the collision detection section 15 increases significantly. Therefore, when the detection device 18 detects a large change in internal pressure, a pedestrian collision can be reliably detected.

Further, when sensing a pedestrian collision, the collision detection unit 15 causes elastic deformation to effectively detect a pedestrian collision. On the other hand, the collision detection section 15 is plastically deformed immediately after the pedestrian collision occurs, and there is no repulsive force from the collision detection section 15.

With reference to FIG. 5, the behavior of the collision detection device 11 when a minor collision occurs will be described. FIG. 5(A) is a side cross-sectional view showing the behavior of the collision detection device 11 when a light collision occurs, and FIG. 5(B) is a side cross-sectional view showing the deformation state of the collision detection unit 15 in detail. be.

Referring to FIG. 5(A), when a light collision in which a small animal 27 or the like collides with the front of the vehicle 10 occurs, the bumper face 14 and grille 16 shown in FIG. 2(A) are deformed toward the rear. . Furthermore, the impact absorbing section 17 and the collision detecting section 15 deform toward the rear. In particular, by deforming the impact absorbing portion 17, impact energy is absorbed and the impact applied to the small animal 27 can be alleviated.

Referring to FIG. 5(B), since the center of gravity of the small animal 27 is lower than that of the pedestrian 26 described above, the input direction of the impact when a minor collision occurs is relative to the front and back direction, as shown by the arrow. and become almost parallel. In this case, the lower surface portion 151 consisting of the hard portion 155, which is a plate member extending in the front-rear direction, generates a large stress. Further, in a light collision, since the impact acting downward is small, the amount of deformation of the front surface portion 152 and the top surface portion 153 comprising the soft portion 154 is also small. For this reason, although the collision detection unit 15 undergoes some crushing deformation, the amount of deformation is much smaller than when a pedestrian collision occurs. Therefore, pressure fluctuations inside the collision detection section 15 are also small.

When sensing a light collision, the collision detection unit 15 causes a relatively small elastic deformation to effectively detect the light collision. On the other hand, the collision detection section 15 is plastically deformed immediately after a light collision occurs, and there is no repulsive force from the collision detection section 15.

When a light collision occurs, the ECU 20 detects that a light collision has occurred based on the fact that the amount of deformation of the collision detection unit 15 detected by the detection device 18, such as the amount of pressure change or the amount of air discharged, does not exceed a certain value. Detect what has happened. Furthermore, the ECU 20 uses the notification device 25 to notify the occupant that a minor collision has occurred.

After that, the ECU 20 does not inflate and deploy the airbag 22 and does not operate the pop-up hood 23. This prevents the occupant's visibility from being obstructed due to inadvertent activation of the airbag 22 and pop-up hood 23.

The main effects achieved by this embodiment described above will be explained below.

According to the collision detection device 11, at least the lower part of the collision detection part 15 is integrally molded with the impact absorption part 17, so that the rigidity of at least the lower part of the collision detection part 15 is reduced by the impact absorption part 17 made of a hard material. Can be secured. Therefore, when a minor collision occurs, the amount of deformation of the collision detection unit 15 can be reduced, and a minor collision and a pedestrian collision can be clearly distinguished and detected. Further, since there is no need to separately prepare the collision detection section 15 as a separate component, the number of parts of the collision detection device 11 can be reduced.

Furthermore, by configuring the lower part of the collision detection part 15 with the same material as the impact absorption part 17, which is a synthetic resin plate, the stress in the front and back direction of the lower part of the collision detection part 15 is increased, and it is By further reducing the amount of deformation of the collision detection unit 15, pedestrian collisions and light collisions can be distinguished and detected.

Furthermore, since the lower surface of the collision detection section 15 is made of the hard part 155, the amount of deformation of the collision detection section 15 when a light collision occurs is reduced, while the front and upper surfaces of the collision detection section 15 are made of a soft part. The portion 154 increases the amount of deformation of the collision detection portion 15 when a pedestrian collision occurs. Thereby, a pedestrian collision and a minor collision can be more clearly distinguished and detected.

Furthermore, by integrally molding at least the lower portion of the collision detection section 15 with the impact absorption section 17, the rigidity of at least the lower portion of the collision detection section 15 can be ensured by the impact absorption section 17 made of a hard material. Therefore, in the event of a light collision, the amount of deformation of the detection unit housing portion and the collision detection unit 15 can be reduced, and a light collision and a pedestrian collision can be distinguished and detected.

Furthermore, since the lower surface of the collision detection section 15 is made up of the hard portion 155, the amount of deformation of the collision detection section 15 when a light collision occurs is reduced, and the front and upper surfaces of the collision detection section 15 are made of the soft portion 154. This increases the amount of deformation of the collision detection unit 15 when a pedestrian collision occurs.

Furthermore, since the collision detection section 15 of the present invention is formed on the front surface 173 of the shock absorption section 17, the impact when a pedestrian collision or a light collision occurs directly acts on the collision detection section 15. The collision detection unit 15 can clearly distinguish and detect a pedestrian collision and a minor collision.

Furthermore, by forming the collision detection section 15 of the present invention at the upper end of the shock absorption section 17, the collision detection section 15 can more clearly distinguish and detect a pedestrian collision and a minor collision.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto and can be modified without departing from the gist of the present invention. Moreover, each of the above-mentioned forms can be combined with each other.

For example, in this embodiment, with reference to FIG. 1(B), a tube-type collision detection unit 15 is employed, but a chamber-type collision detection unit 15 may also be employed.

Further, with reference to FIG. 1(B), in the above description, pedestrian collisions and light collisions are detected based on changes in the internal pressure of the collision detection unit 15 and changes in the exhaust air flow rate. It is also possible to employ an optical fiber or the like whose output changes depending on the deformation of the optical fiber.

Further, with reference to FIG. 1(B), in the above description, the shock absorbing section 17 is made of a synthetic resin plate, but the shock absorbing section 17 can also be partially made of other members such as a foam material. .

Furthermore, referring to FIG. 2(B), the thickness of the lower surface portion 151 can be made relatively thicker than that of the front surface portion 152 and the upper surface portion 153, so that pedestrian collisions and light collisions can be distinguished and detected. The effect can be noticeable.

Furthermore, with reference to FIG. 2(B), the rigidity of the lower surface part 151 can be further improved by forming ribs on the lower surface of the lower surface part 151 or by making the lower surface part 151 partially or entirely thick. You can also.

10 Vehicle 11 Collision detection device 12 Front hood 13 Bumper beam 14 Bumper face 15 Collision detection section 151 Lower surface section 152 Front section 153 Upper surface section 154 Soft section 155 Hard section 16 Grill 17 Shock absorption section 171 Horizontal member 172 Vertical member 173 Front surface 18 Detection device 19 Speed sensor 20 ECU
21 CPU
22 Airbag 23 Pop-up hood 24 RAM
25 Notification device 26 Pedestrian 27 Small animal

Claims (7)

an impact absorption part that extends along the vehicle width direction between the bumper face and the bumper beam of the vehicle, and absorbs impact by deforming when the vehicle collides;
a collision detection section extending along the vehicle width direction and deforming when the vehicle collides to detect that the collision has occurred;
At least a lower portion of the collision detection section is integrated with the shock absorption section,
A collision detection device characterized in that the lower part of the collision detection part is made of the same material as the impact absorption part, and the upper part of the collision detection part is made of a material that is softer than the impact absorption part. an impact absorption part that extends along the vehicle width direction between the bumper face and the bumper beam of the vehicle, and absorbs impact by deforming when the vehicle collides;
a collision detection section extending along the vehicle width direction and deforming when the vehicle collides to detect that the collision has occurred;
At least a lower portion of the collision detection section is integrated with the shock absorption section,
The collision detection unit has a lower surface portion, a front surface portion, and an upper surface portion,
The lower surface portion is made of the same hard material as the shock absorbing portion,
A collision detection device, wherein the front surface portion and the upper surface portion are made of a softer material than the lower surface portion. 3. The collision detection device according to claim 1, wherein the shock absorber is made of a synthetic resin plate. The collision detection device according to any one of claims 1 to 3, wherein the collision detection section is arranged between a front surface of the shock absorption section and the bumper face. 5. The collision detection device according to claim 1 , wherein the collision detection section is tube-shaped. The collision detection device according to any one of claims 1 to 5 , wherein the collision detection section is formed on a front surface of the shock absorption section. 7. The collision detection device according to claim 1, wherein the collision detection section is formed at an upper end of the shock absorption section.

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