JP2014073691A - Vehicle bumper with pedestrian collision detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a balance between performance of protecting a pedestrian and performance of sensing while preventing or suppressing damage to a chamber member by a foreign material.SOLUTION: In a front bumper 12 with a collision determination system 10, an absorber cover 60 and an upper cover part 44 extend toward vehicle front-rear directions so as to cover a chamber member 18 from an upper side of a vehicle. This makes it possible to prevent or suppress a foreign material such as a pebble from colliding with the chamber member 18, preventing or suppressing damage to the chamber member 18 by the foreign material. Further, when an absorber 30 is deformed toward the chamber member 18, the absorber cover 60 is flexural-deformed so as to be convex toward the upper side of the vehicle, with the upper cover part 44 flexural-deformed toward the upper side of the vehicle. This makes it possible to adjust an amount of invasion of the absorber 30 toward the chamber member 18 by flexural-deforming of the upper cover part 44 and absorber cover 60, realizing the balance between the performance of protecting a pedestrian and the performance of sensing.

Description

  The present invention relates to a vehicle bumper equipped with a pedestrian collision detection device.

  A collision detection device described in Patent Literature 1 below includes a chamber member disposed on the vehicle front side of a bumper reinforcement, and an absorber disposed on the vehicle lower side and the vehicle front side of the chamber member. Yes. The pressure sensor outputs a signal corresponding to the pressure in the pressure chamber, which is the internal space of the chamber member, to the ECU, and the ECU determines whether the vehicle has collided with a pedestrian based on the detected value of the pressure sensor. ing. In addition, as a collision detection apparatus, there exist some described in the following patent documents 2-patent documents 6. FIG.

JP 2010-1332040 A JP 2011-143825 A JP 2010-285142 A JP 2010-179668 A JP 2009-227087 A JP 2009-12614 A

  However, in the collision detection apparatus of Patent Document 1, for example, when foreign matter such as pebbles enters the vehicle upper side of the pressure chamber from a hole or the like of the bumper grill of the vehicle, the foreign matter may damage the pressure chamber.

  Moreover, in the collision detection apparatus of the said patent document 1, it detects whether the protection performance with respect to the pedestrian (the leg part) at the time of a vehicle colliding with the pedestrian (the leg part), and whether the vehicle collided with the pedestrian. It was difficult to achieve both the sensing performance and That is, in this collision detection apparatus, the collision load is obtained using the volume change of the chamber member (the amount of penetration of the absorber into the chamber member), and the volume change of the chamber member is determined based on the volume (volume) of the collision body entering the absorber. ). For this reason, for example, if the hardness of the absorber is lowered in order to increase the protection performance for pedestrians, the intrusion volume (amount) of the collision body into the absorber increases. As a result, the detection value of the pressure sensor becomes high, and it may not be possible to accurately detect whether the vehicle has collided with a pedestrian or the vehicle has collided with a roadside marker, a post cone, or the like. On the other hand, when the hardness of the absorber is increased, the protection performance for the pedestrian (the leg) is lowered when the vehicle collides with the pedestrian (the leg).

  In consideration of the above-described facts, the present invention provides a vehicular bumper including a pedestrian collision detection device capable of achieving both protection performance and sensing performance for a pedestrian while preventing or suppressing damage to a chamber member due to foreign matter. The purpose is to provide.

  The bumper for vehicles provided with the pedestrian collision detection device according to claim 1 is a bumper reinforcement arranged with the vehicle width direction as a longitudinal direction, and a bumper cover arranged outside the bumper reinforcement in the vehicle front-rear direction. , An absorber interposed therebetween, a chamber member disposed adjacent to the vehicle longitudinal direction outer side surface of the bumper reinforcement with the vehicle width direction as a longitudinal direction, and the inside being a pressure chamber, and the pressure of the pressure chamber A pressure detector that outputs a signal corresponding to the change, a collision determination unit that determines whether or not the vehicle has collided with a pedestrian based on the signal output by the pressure detector, and the chamber member is covered from above the vehicle The vehicle front-rear direction end portion extends in the vehicle front-rear direction and the bumper reinforcement and the absorber are And a cover portion that is coupled to one side and is bent and deformed by contacting the other end of the bumper reinforcement and the absorber at the other end in the vehicle front-rear direction when the absorber is deformed to the chamber member side. .

  In the vehicle bumper provided with the pedestrian collision detection device according to claim 1, the bumper reinforcement is provided on the vehicle front-rear direction outer side (on the vehicle front side and the vehicle rear side with respect to the bumper reinforcement provided on the vehicle front part). A bumper cover is disposed on the rear side of the vehicle against the bumper reinforcement, and an absorber is interposed between the bumper reinforcement and the bumper cover. Further, a chamber member is disposed adjacent to the outer side surface of the bumper reinforcement in the vehicle front-rear direction, and the inside of the chamber member is a pressure chamber.

  And when a vehicle collides with a collision body, an absorber compresses and deforms to the chamber member side, and a chamber member is pressed by an absorber. At this time, a signal corresponding to the pressure change in the pressure chamber is output from the pressure detector to the collision determination unit, and the collision determination unit determines whether or not the vehicle has collided with a pedestrian.

  Here, the cover portion extends in the vehicle front-rear direction in a side view so as to cover the chamber member from the vehicle upper side. Thereby, for example, when foreign matter such as pebbles enters the vehicle upper side of the chamber member from a hole of the bumper grill of the bumper cover, the cover portion prevents or suppresses the foreign matter from hitting the chamber member. Therefore, damage to the chamber member due to foreign matter can be prevented or suppressed.

  Moreover, the vehicle longitudinal direction one end part of the cover part is couple | bonded with one of the bumper reinforcement and the absorber. When the absorber is compressively deformed toward the chamber member, the other end of the cover in the vehicle front-rear direction is brought into contact with the other of the bumper reinforcement and the absorber, and the cover is bent and deformed. Thereby, the amount of penetration of the absorber into the chamber member when the vehicle collides with the collision body can be adjusted by bending deformation of the cover portion. That is, the amount of penetration of the absorber into the chamber member can be adjusted by compressive deformation of the absorber and bending deformation of the cover portion. Thereby, for example, even if the hardness of the absorber is set low, the impact energy input to the absorber is also used for bending deformation of the cover portion, so that the amount of penetration of the absorber into the chamber member side can be adjusted so as not to increase. . As a result, it is possible to achieve both the protection performance for the pedestrian and the sensing performance in the pedestrian collision detection device.

The bumper for vehicles provided with the pedestrian collision detection device according to claim 2 is the invention according to claim 1, wherein the cover portion has a deformation starting point portion which becomes a starting point when the cover portion is bent and deformed. Is formed.

In the vehicle bumper provided with the pedestrian collision detection device according to the second aspect, the cover part is formed with the deformation starting point, and the cover part is bent and deformed starting from the deformation starting point. Thereby, for example, the amount of penetration of the absorber into the chamber member can be easily adjusted by appropriately changing the position, shape, number, and the like of the deformation starting portion.

The bumper for vehicles provided with the pedestrian collision detection device according to claim 3 is the invention according to claim 1 or 2, wherein the cover portion is formed separately from the bumper reinforcement and the absorber. In addition, one end portion in the vehicle front-rear direction of the cover portion is coupled to the bumper reinforcement, and the other end portion in the vehicle front-rear direction of the cover portion is configured to be able to contact the absorber.

In the vehicle bumper provided with the pedestrian collision detection device according to claim 3, for example, the cover portion configured separately is fixed to the bumper reinforcement, and the contact portion that contacts the absorber is the cover portion. By forming in, it can provide a cover part in a pedestrian collision detection apparatus. Therefore, a cover part can be provided using the structure of the existing pedestrian collision detection apparatus.

The bumper for vehicles provided with the pedestrian collision detection device according to claim 4 is the invention according to claim 1 or 2, wherein one end of the cover portion in the vehicle front-rear direction is formed integrally with the absorber, The other end of the cover in the vehicle front-rear direction is configured to be able to contact the bumper reinforcement.

In the vehicle bumper including the pedestrian collision detection device according to the fourth aspect, for example, the cover portion can be provided on the absorber by integrally forming the cover portion on the upper portion of the absorber. Therefore, the cover part can be provided while suppressing an increase in the number of parts.

  According to the vehicle bumper provided with the pedestrian collision detection device according to claim 1, it is possible to achieve both protection performance and sensing performance for the pedestrian while preventing or suppressing damage to the chamber member due to foreign matter. .

  According to the vehicle bumper provided with the pedestrian collision detection device according to the second aspect, it is possible to easily adjust the amount of penetration of the absorber into the chamber member side.

  According to the vehicle bumper including the pedestrian collision detection device according to the third aspect, the cover portion can be provided using the structure of the existing pedestrian collision detection device.

  According to the vehicle bumper including the pedestrian collision detection device according to the fourth aspect, the cover portion can be provided while suppressing an increase in the number of parts.

It is a typical sectional side view which shows the schematic whole structure of the front bumper provided with the collision determination system which concerns on this Embodiment. It is a sectional side view in the position of the attaching part of the absorber cover shown by FIG. It is a sectional side view corresponding to FIG. 1 which shows the state which the vehicle collided with the collision body. It is a sectional side view corresponding to Drawing 2 showing the state where a vehicle collided with a collision object. (A) is the expanded side sectional view which shows an example which formed the deformation | transformation origin part in the notch shape, (B) is the expanded side sectional view which shows the other example which formed the deformation | transformation origin part in the notch shape. is there.

  Hereinafter, the vehicle bumper including the pedestrian collision detection device according to the present embodiment will be described with reference to FIGS. 1 and 2. In these drawings, an arrow FR appropriately shown indicates the front side of the vehicle, and an arrow UP indicates the upper side of the vehicle.

  As shown in these drawings, a collision determination system 10 as a pedestrian collision detection device is applied to a front bumper 12 as a vehicular bumper arranged at the front end of a vehicle (automobile). The presence or absence of a collision is determined. This will be specifically described below.

  The front bumper 12 includes a bumper reinforcement (hereinafter referred to as “bumper R / F”) 14 which is a bumper skeleton member. The bumper R / F 14 is made of, for example, a metal material such as iron or aluminum, and is configured as a skeleton member arranged with the vehicle width direction as a longitudinal direction. The bumper R / F 14 is supported with respect to the vehicle body across the front ends of a pair of left and right front side members (not shown) constituting the skeleton member on the vehicle body side.

  The front bumper 12 includes a bumper cover 16 that covers the bumper R / F 14 from the outside in the vehicle front-rear direction, that is, from the front side. The bumper cover 16 is made of a resin material or the like, and the bumper cover 16 is fixedly supported to the vehicle body at a portion not shown so that a space S is formed between the bumper cover 16 and the bumper R / F 14. Has been. The bumper cover 16 includes a bumper grill (not shown) that constitutes a part of the bumper cover 16.

  A chamber member 18 is disposed in the space S between the bumper R / F 14 and the bumper cover 16 in the front bumper 12. The chamber member 18 is configured as a hollow structure arranged with the vehicle width direction as a longitudinal direction, and is fixedly attached to the front surface 14A of the bumper R / F 14. Further, the positions at both ends in the longitudinal direction of the chamber member 18 are substantially coincident with the positions at both ends of the bumper R / F 14.

  The chamber member 18 has a rigidity capable of maintaining its shape (hollow cross-sectional shape) in a state of being fixedly attached to the bumper R / F 14 as described above, and is communicated with the atmosphere at a position not shown. It has a communication hole. Therefore, normally (statically), the pressure chamber 20 that is the internal space of the chamber member 18 is configured to be at atmospheric pressure. The chamber member 18 receives a relatively low compressive load from the front side of the vehicle and is crushed while allowing air to escape from the communication hole, so that the volume of the pressure chamber 20 is reduced while dynamically changing the internal pressure of the pressure chamber 20. It has become.

  Furthermore, the collision determination system 10 includes a pressure sensor 22, and the pressure sensor 22 is electrically connected to an ECU 24 serving as a collision determination unit. Then, the pressure sensor 22 outputs a signal corresponding to the pressure in the pressure chamber 20 to the ECU 24, and the ECU 24 determines whether or not there is a collision with the front bumper 12 based on the output signal of the pressure sensor 22. In addition, it is determined whether or not the collision object to the front bumper 12 is a pedestrian.

  Between the bumper R / F 14 and the bumper cover 16, an absorber 30 made of urethane foam or the like is disposed with the vehicle width direction as a longitudinal direction. The absorber 30 includes a main body portion 32 constituting a lower portion of the absorber 30, an upper cover portion 44 as a cover portion constituting the upper portion of the absorber 30, and a spacer portion 34 connecting the main body portion 32 and the upper cover portion 44. , Including.

  The main body 32 is provided between the bumper R / F 14 and the bumper cover 16 on the vehicle lower side of the chamber member 18. And the rear-end part of the main-body part 32 is being fixed to the front surface 14A of bumper R / F14 (contact). Thereby, the absorber 30 is fixedly attached to the bumper R / F 14.

  The spacer portion 34 is disposed on the vehicle front side of the chamber member 18 and is connected to the main body portion 32 via the connection portion 36 only at the front edge of the lower surface thereof. In other words, a slit 38 that cuts from the rear side of the vehicle to the front side of the vehicle is formed at the boundary between the main body portion 32 and the spacer portion 34 in the absorber 30. Since the slits 38 are formed, the spacer portion 34 is supported by only a part of the main body portion 32 (the front end edge side of the lower surface).

  Moreover, the vehicle rear side part of the spacer part 34 is formed in the uneven | corrugated shape over the vehicle width direction by planar view. In other words, a plurality of slits that cut from the vehicle rear side to the vehicle front side are formed in the vehicle rear side portion of the spacer portion 34 side by side in the vehicle width direction. Thereby, in the vehicle rear side part of the spacer part 34, the convex part 40 protruded from the vehicle front side part of the spacer part 34 to the vehicle rear side, and the recessed part 42 (refer FIG. 2) open | released to the vehicle rear side, Are alternately formed in the vehicle width direction.

  The upper cover portion 44 is formed in a substantially long plate shape, and is disposed so as to cover the chamber member 18 from the vehicle upper side with the plate thickness direction being substantially the vehicle vertical direction. Further, the front end portion of the upper cover portion 44 is formed integrally with the upper portion of the spacer portion 34, whereby the upper cover portion 44 is configured as a cantilever beam having the front end portion as a fulcrum. Further, the rear end portion of the upper cover portion 44 is spaced apart from the upper side of the bumper R / F 14 and is disposed so as to overlap the bumper R / F 14 in the vehicle vertical direction. Accordingly, a gap G is formed between the rear end portion of the upper cover portion 44 and the bumper R / F 14. Further, a groove 46 opened to the rear side of the vehicle is formed at a boundary portion between the convex portion 40 and the upper cover portion 44.

  Further, as shown in FIG. 2, a plurality of front cutout portions 48 are formed at the front end portion of the upper cover portion 44 at positions corresponding to the concave portions 42 of the spacer portion 34. The front notch 48 is opened to the front side and the upper side of the vehicle and communicates with the recess 42. Thereby, the upper cover portion 44 is formed with a hole portion 50 penetrating in the vehicle vertical direction. In addition, a plurality of rear cutouts 52 are formed at the rear end of the upper cover 44 to dispose the mounting portions 62 of the absorber cover 60 described later, and the rear cutouts 52 are opened to the vehicle rear side. Has been.

  Here, the main body portion 32 of the absorber 30 is compressed and deformed with respect to the frontal collision to absorb impact energy. Further, as the absorber 30 is compressed and deformed, the spacer portion 34 (the convex portion 40) of the absorber 30 is deformed to the rear side of the vehicle, and the chamber member 18 is compressed so that the volume of the pressure chamber 20 is reduced. It has become so. And when the spacer part 34 deform | transforms into the vehicle rear side, the spacer part 34 inclines to the vehicle rear diagonally lower side about the site | part of the connection part 36 as a fulcrum. Thus, at this time, the rear end portion of the upper cover portion 44 is brought into contact with the upper end portion of the bumper R / F 14 so that the upper cover portion 44 is bent and deformed upward.

  On the other hand, as shown in FIGS. 1 and 2, an absorber cover 60 as a cover portion is provided on the vehicle upper side of the absorber 30 and the bumper R / F 14. The absorber cover 60 is formed in a substantially long plate shape, and is disposed with the plate thickness direction being substantially the vehicle vertical direction and the longitudinal direction being the vehicle width direction. Further, the rear end portion of the absorber cover 60 is curved to the vehicle lower side and extends to the vehicle rear side of the upper end portion of the bumper R / F 14. Accordingly, the gap G between the bumper R / F 14 and the upper cover portion 44 and the chamber member 18 are covered by the absorber cover 60 from the upper side of the vehicle.

  A plurality of attachment portions 62 are formed at the rear end portion of the absorber cover 60 at positions corresponding to the rear notch portions 52 of the absorber 30 described above. The mounting portion 62 is formed in a concave shape that bulges to the lower side of the vehicle and opens to the rear and upper side of the vehicle. Then, the bottom wall of the mounting portion 62 is fixed (coupled) to the bumper R / F 14 by a fastening member such as a bolt 54, whereby the absorber cover 60 is fixed (coupled) to the bumper R / F 14. .

  As shown in FIG. 2, a plurality of projecting portions 64 are integrally formed at the front end portion of the absorber cover 60 at a position corresponding to the above-described front notch portion 48 of the absorber 30. The protruding portion 64 protrudes from the absorber cover 60 to the vehicle front side and is disposed in the front cutout portion 48 of the absorber 30. The protrusions 64 are integrally formed with contact portions 66. The contact portion 66 is formed in a substantially rectangular shape in a side view, protrudes from the protruding portion 64 to the vehicle lower side, and is inserted into the hole 50 of the absorber 30. Thereby, when the spacer part 34 of the absorber 30 deform | transforms into the vehicle rear side, the spacer part 34 is contact | abutted by the contact part 66, and the load to the vehicle rear side acts on the contact part 66. Has been.

  Further, the upper wall 60A of the absorber cover 60 is slightly bent into a substantially V shape opened to the vehicle lower side in a side view. In other words, the upper wall 60A is bent at an intermediate portion in the vehicle front-rear direction and slightly protrudes toward the vehicle upper side. The bent portion (ridge line portion) is a deformation starting point portion 68, and when a load on the rear side of the vehicle is input to the contact portion 66 of the absorber cover 60, the absorber cover 60 is deformed by the deformation starting point portion 68. It is configured to bend and deform so as to be convex toward the upper side of the vehicle.

  Next, the operation and effect in the present embodiment will be described.

  In the front bumper 12 including the collision determination system 10 configured as described above, when the collision body collides with the front bumper 12, the absorber 30 is compressed and deformed via the bumper cover 16, so that energy at the time of collision is absorbed. Is done. At this time, since the spacer portion 34 (the convex portion 40 thereof) presses the chamber member 18, the pressure in the pressure chamber 20 changes, and the pressure sensor 22 outputs a signal corresponding to the pressure in the pressure chamber 20 to the ECU 24. . Then, the ECU 24 determines whether or not there is a collision with the front bumper 12 based on the output signal of the pressure sensor 22 and determines whether or not the collision object with the front bumper 12 is a pedestrian.

  Here, the upper cover portion 44 and the absorber cover 60 of the absorber 30 extend in the vehicle front-rear direction so as to cover the chamber member 18 from the vehicle upper side in a side view. Thus, for example, when foreign matter such as pebbles enters the vehicle upper side (inside the front bumper 12) of the chamber member 18 from the hole of the bumper grille of the bumper cover 16 and bounces around, the upper contact of the foreign matter with the chamber member 18 is increased. It is prevented or suppressed by the cover part 44 and the absorber cover 60. Therefore, damage to the chamber member 18 due to foreign matter can be prevented or suppressed.

  Further, the front end portion of the upper cover portion 44 is coupled to the spacer portion 34 of the absorber 30. When the absorber 30 is deformed to the chamber member 18 side, the upper cover portion 44 tilts together with the spacer portion 34 with the connection portion 36 as a fulcrum and tilts downward to the rear of the vehicle. The end is brought into contact with the upper end of the bumper R / F 14. As a result, a load (reaction force) on the upper side of the vehicle acts on the rear end portion of the upper cover portion 44 from the bumper R / F 14, and the upper cover portion 44 is bent and deformed on the upper side of the vehicle (see FIG. 3).

  Further, the rear end portion (mounting portion 62) of the absorber cover 60 is fixed (coupled) to the bumper R / F 14, and when the absorber 30 is deformed to the chamber member 18 side, the spacer portion 34 of the absorber 30 is moved to the absorber. The cover 60 is brought into contact with the front end portion (contact portion 66). When the spacer portion 34 comes into contact with the front end portion (contact portion 66) of the absorber cover 60, a load on the vehicle rear side acts on the front end portion (contact portion 66) from the spacer portion 34, and the absorber. The cover 60 is bent and deformed so as to protrude upward of the vehicle (see FIG. 4).

  Thus, when the vehicle collides with the collision body, the absorber 30 is compressed and deformed, and the upper cover portion 44 and the absorber cover 60 are bent and deformed. Thereby, the amount of penetration of the absorber 30 into the chamber member 18 when the vehicle collides with the collision body can be adjusted by bending deformation of the upper cover portion 44 and the absorber cover 60. Therefore, for example, even if the hardness of the absorber 30 is set to be low, the impact energy input to the absorber 30 is also used for bending deformation of the upper cover portion 44 and the absorber cover 60, so that the absorber 30 is moved toward the chamber member 18 side. It can be adjusted so that the amount of intrusion does not increase. As a result, it is possible to achieve both the protection performance for the pedestrian and the sensing performance in the collision determination system 10.

Further, a deformation starting point portion 68 (ridge line portion) is formed on the upper wall 60A of the absorber cover 60, and the absorber cover 60 is bent and deformed starting from the deformation starting point portion 68. Accordingly, for example, by appropriately changing the position or the like of the deformation starting point 68 in the vehicle front-rear direction, the amount of penetration of the absorber 30 into the chamber member 18 when the vehicle collides with the collision body can be easily adjusted. .

Furthermore, the absorber cover 60 is configured separately from the bumper R / F 14 and the absorber 30. The rear end portion of the absorber cover 60 is fixed (coupled) to the bumper R / F 14, and the front end portion (contact portion 66) of the absorber cover 60 is configured to be able to contact the absorber 30. Thereby, the absorber cover 60 can be provided using the structure of the existing collision determination system.

Further, the front end portion of the upper cover portion 44 is formed integrally with the spacer portion 34 of the absorber 30, and the rear end portion of the upper cover portion 44 is configured to be able to contact the upper end portion of the bumper R / F 14. Thereby, the upper cover part 44 can be provided, suppressing the increase in a number of parts.

Furthermore, the upper wall 60A of the absorber cover 60 is bent so as to be convex toward the vehicle upper side (the side opposite to the absorber 30) in a side view. As a result, when the upper wall 60A is bent and deformed, the upper wall 60A is bent and deformed so as to be convex toward the vehicle upper side (the side opposite to the absorber 30), so that interference between the upper wall 60A and the absorber 30 is suppressed. However, the upper wall 60A can be bent and deformed.

Further, a groove 46 is formed at a boundary portion between the upper cover portion 44 and the spacer portion 34 in the absorber 30. Thereby, for example, the bending rigidity of the upper cover portion 44 can be easily set by appropriately changing the groove depth of the groove 46.

In the present embodiment, the upper cover portion 44 is integrally formed with the absorber 30, and the absorber cover 60 is provided on the vehicle upper side of the chamber member 18. Instead of this, the upper cover portion 44 or the absorber cover 60 may be omitted.

In the present embodiment, the deformation starting point portion 68 of the absorber cover 60 is a bent portion (ridge line portion) in the upper wall 60A of the absorber cover 60. Alternatively, as shown in FIG. 5A, the deformation starting point 68 may be formed in a substantially V-shaped notch shape (notch shape) opened to the vehicle lower side. In this case, the upper wall 60A may be formed in a straight line when viewed from the side, or a plurality of deformation starting point portions 68 may be formed. Further, when the deformation starting point portion 68 is formed in a notch shape, the shape is not limited to the shape shown in FIG. 5 (A). For example, as shown in FIG. You may form in the substantially semicircular notch shape (notch shape).

Further, in the present embodiment, the deformation starting point portion is not formed in the upper cover portion 44, but the deformation starting point portion may be formed in the upper cover portion 44. In this case, the deformation starting point portion may have a notch shape (notch shape) as shown in FIGS.

In the present embodiment, one deformation starting point 68 is formed on the upper wall 60 </ b> A of the absorber cover 60. Instead of this, a plurality of deformation starting point portions 68 may be formed on the upper wall 60A so that the upper wall 60A is convex toward the vehicle upper side. Further, the deformation starting point portion 68 may be omitted, and the upper wall 60A may be curved in an arc shape opened downward in the vehicle in a side view. Even in this case, when a load to the rear side of the vehicle acts on the contact portion 66 of the absorber cover 60, the absorber cover 60 is bent and deformed so as to protrude upward.

Furthermore, in the present embodiment, an example in which the collision determination system 10 is applied to the front bumper 12 has been described. However, the present invention is not limited to this, and for example, the above-described configurations are reversed and applied to the rear bumper. Also good.

10 Collision determination system (pedestrian collision detection device)
12 Front bumper (vehicle bumper)
14 Bumper reinforcement 16 Bumper cover 18 Chamber member 20 Pressure chamber 22 Pressure sensor (pressure detector)
24 ECU (collision determination unit)
30 Absorber 44 Upper cover (cover)
60 Absorber cover (cover part)
68 Deformation start point

Claims (4)

An absorber interposed between a bumper reinforcement arranged with the vehicle width direction as a longitudinal direction and a bumper cover arranged outside the bumper reinforcement in the vehicle front-rear direction;
A chamber member that is disposed adjacent to the vehicle front-rear direction outer side surface of the bumper reinforcement with the vehicle width direction as a longitudinal direction, and the inside is a pressure chamber;
A pressure detector that outputs a signal corresponding to a pressure change in the pressure chamber;
A collision determination unit that determines whether or not the vehicle has collided with a pedestrian based on a signal output by the pressure detector;
When extending in the vehicle longitudinal direction in a side view so as to cover the chamber member from the upper side of the vehicle, one end of the vehicle longitudinal direction is coupled to one of the bumper reinforcement and the absorber, and the absorber is deformed to the chamber member side. And a cover part that is bent and deformed by contacting the other end of the vehicle longitudinal direction with the other of the bumper reinforcement and the absorber,
Bumper for vehicles provided with the pedestrian collision detection apparatus which has.   The vehicle bumper provided with the pedestrian collision detection device according to claim 1, wherein the cover portion is formed with a deformation starting point portion that becomes a starting point when the cover portion is bent and deformed. The cover part is configured separately from the bumper reinforcement and the absorber,
One end part in the vehicle front-rear direction of the cover part is coupled to the bumper reinforcement,
The bumper for vehicles provided with the pedestrian collision detection apparatus of Claim 1 or Claim 2 comprised so that the vehicle longitudinal direction other end part of the said cover part could contact | abut to the said absorber. One end of the cover portion in the vehicle front-rear direction is formed integrally with the absorber,
The bumper for vehicles provided with the pedestrian collision detection apparatus of Claim 1 or Claim 2 comprised so that the vehicle longitudinal direction other end part of the said cover part could contact | abut to the said bumper reinforcement.