JP5983558B2 - Bumper structure for vehicles with pedestrian collision detection device - Google Patents

Description

  The present invention relates to a vehicle bumper structure including a pedestrian collision detection device.

  In the vehicular bumper provided with the pedestrian collision detection device described in Patent Document 1 below, the end portion of the chamber member on the outer side in the vehicle width direction wraps around to cover the end surface on the outer side in the vehicle width direction of the bumper reinforcement. Yes. In addition, a spacer is disposed on the back surface of the bumper cover at a portion corresponding to the terminal portion of the chamber member. Thereby, when the corner part of a bumper cover (vehicle) collides with collision bodies, such as a pedestrian, the said terminal part of a chamber member is crushed by a bumper reinforcement and a spacer (it compresses and deforms). Therefore, the pedestrian detection performance in the corner portion of the vehicle can be improved. In addition, there exists a thing described in the following patent documents 2-patent documents 6 as a pedestrian collision detection apparatus.

International Publication No. 2011/128971 JP 2000-264142 A JP 2010-247755 A JP 2010-285142 A JP 2007-216804 A JP 2009-040423 A

  However, in the vehicle bumper provided with the pedestrian collision detection device, as described above, the spacer is disposed on the back surface of the bumper cover, and when a load to the rear side of the vehicle is input to the bumper cover, the spacer Is configured to press the chamber member inward in the vehicle width direction. For this reason, it is necessary to ensure the space which arrange | positions the terminal part of a chamber member, and a spacer between the bumper reinforcement and bumper cover in the corner part of a bumper cover. On the other hand, if the inclination with respect to the vehicle width direction in the corner portion of the bumper cover is increased in design, the terminal portion of the chamber member and the spacer may not be arranged between the bumper reinforcement and the bumper cover. Therefore, it is desirable to have a space-efficient bumper structure at the corner portion of the bumper cover.

  An object of the present invention is to provide a vehicle bumper structure including a pedestrian collision detection device that can realize a space-efficient bumper structure in consideration of the above facts.

A vehicle bumper structure including the pedestrian collision detection device according to claim 1 is disposed adjacent to a vehicle front-rear direction outer side surface of a bumper reinforcement disposed with a vehicle width direction as a longitudinal direction. A chamber member formed in an elongated shape with the direction as a longitudinal direction, and a sensor member whose output changes when deformed, and an intermediate portion in the longitudinal direction of the chamber member, and both longitudinal end portions of the bumper A chamber main body portion that protrudes outward in the vehicle width direction with respect to corners on the vehicle longitudinal direction outer side at both ends in the vehicle width direction of the reinforcement, and is disposed adjacent to the vehicle longitudinal direction outer side of the corner portions, and the sensor member A collision determination unit that determines whether or not the vehicle has collided with a pedestrian based on a signal output from the vehicle, and a vehicle width direction that is a longitudinal direction outward of the sensor member in the vehicle front-rear direction A bumper cover disposed as said constitute the longitudinal end portions of the chamber member, said with extended from the vehicle front-rear direction inner portion outward in the vehicle width direction in the longitudinal direction both end portions of the chamber body, the vehicle front and rear in the event of a collision An extension portion that bends and deforms the vehicle width direction outer side portion of the chamber body portion inward in the vehicle front-rear direction by being pressed by the bumper cover that is deformed inward in the direction.
In addition, a vehicle bumper structure including the pedestrian collision detection device according to claim 2 is disposed adjacent to a vehicle front-rear direction outer side surface of a bumper reinforcement disposed with a vehicle width direction as a longitudinal direction. It is composed of a pressure tube or an optical fiber sensor formed in a long shape with the direction as the longitudinal direction, and both ends in the longitudinal direction protrude outward in the vehicle width direction with respect to the bumper reinforcement, and output by deformation A sensor member that changes, a collision determination unit that determines whether or not the vehicle has collided with a pedestrian based on a signal output by the sensor member, and a vehicle width direction as a longitudinal direction on the vehicle longitudinal direction outside of the sensor member A bumper cover that is disposed, and extends in the vehicle width direction on the outer side of the bumper reinforcement in the vehicle width direction. The vehicle width direction inner end is fixed to the vehicle longitudinal direction outer side surface of the bumper reinforcement and is deformed inward in the vehicle longitudinal direction at the time of a collision. And an extending portion that bends and deforms the vehicle width direction outer side portion of the sensor member inward in the vehicle front-rear direction by being pressed by the bumper cover.

In the vehicular bumper provided with the pedestrian collision detection device according to claim 1, the bumper reinforcement is arranged with the vehicle width direction as a longitudinal direction. In addition, the vehicle front-rear outer side surface of bumper reinforcement (the front side surface for bumper reinforcement provided at the front of the vehicle and the rear side surface for bumper reinforcement provided at the rear of the vehicle) A sensor member is provided adjacent to. This sensor member is constituted by a chamber member formed in a long shape with the vehicle width direction as a longitudinal direction . Moreover, the longitudinal direction intermediate part of the chamber member is comprised by the chamber main-body part. And the longitudinal direction both ends of the chamber body are projected outward in the vehicle width direction with respect to the corners on the vehicle longitudinal direction outer side at the vehicle width direction both ends of the bumper reinforcement, and the corners on the vehicle longitudinal direction outside. Adjacent to each other. In addition, a bumper cover is provided outside the sensor member in the vehicle front-rear direction.

Here, both end portions in the longitudinal direction of the chamber member are constituted by extending portions, and the extending portions extend outward in the vehicle width direction from inner portions in the longitudinal direction of the chamber main body portion in the longitudinal direction of the vehicle. . And if the vehicle width direction outer side part of a bumper cover collides with a pedestrian (the leg part), the vehicle width direction outer side part of a bumper cover will deform | transform into a vehicle front-back direction inner side, and an extension part will become a vehicle front-back direction inner side. Press. Thereby, the vehicle width direction outer side portion of the chamber main body portion is bent and deformed inward in the vehicle front-rear direction by the extending portion. As a result, the signal output to the collision determination unit changes, and the collision determination unit determines whether the vehicle has collided with a pedestrian.
Moreover, in the vehicle bumper provided with the pedestrian collision detection device according to claim 2, the sensor member adjacent to the vehicle front-rear direction outer side surface of the bumper reinforcement is formed in a long shape with the vehicle width direction as the longitudinal direction. The both ends of the sensor member in the longitudinal direction protrude outward in the vehicle width direction with respect to the bumper reinforcement.
Here, the extending portion extends in the vehicle width direction on the outer side in the vehicle width direction of the bumper reinforcement, and is disposed adjacent to the inner side in the vehicle front-rear direction with respect to both longitudinal ends of the sensor member. Moreover, the vehicle width direction inner side edge part of the extension part is being fixed to the vehicle front-back direction outer side surface of bumper reinforcement. And if the vehicle width direction outer side part of a bumper cover collides with a pedestrian (the leg part), the vehicle width direction outer side part of a bumper cover will deform | transform into a vehicle front-back direction inner side, and an extension part will become a vehicle front-back direction inner side. Press. Thereby, the vehicle width direction outer side portion of the sensor member is bent and deformed inward in the vehicle front-rear direction by the extending portion. As a result, the signal output to the collision determination unit changes, and the collision determination unit determines whether the vehicle has collided with a pedestrian.

Thus , according to the first and second aspects of the present invention, in the collision between the pedestrian and the bumper cover in the vehicle width direction outer portion of the bumper cover, the extension portion of the sensor member in the vehicle width direction outer portion is caused by the extension portion. It is possible to determine whether or not the vehicle collides with a pedestrian. For this reason, unlike the prior art, it is not necessary to arrange a spacer for compressing and deforming the sensor member on the back surface of the bumper cover. Therefore, in the vehicle bumper structure provided with the pedestrian collision detection device, a space efficient bumper structure can be realized.

Bumper structure for a vehicle having a pedestrian collision detection apparatus according to claim 3 is the invention according to claim 1 or claim 2, wherein the extending portion includes a vehicle width direction outer side and the vehicle front-rear direction in a plan view It is inclined inward.

In the vehicle bumper structure including the pedestrian collision detection device according to claim 3 , for example, the bumper cover can be provided with an extending portion corresponding to a vehicle in which an outer portion in the vehicle width direction is bent inward in the vehicle front-rear direction. .

The bumper structure for vehicles provided with the pedestrian collision detection device according to claim 4 is the invention according to any one of claims 1 to 3 , wherein the extension portion is formed in a plate shape. At the same time, the direction perpendicular to the extending direction of the extending portion in plan view is arranged in the plate thickness direction.

In the vehicle bumper structure including the pedestrian collision detection device according to claim 4 , the extending portion is formed in a plate shape in which the direction perpendicular to the extending direction is a plate thickness direction in plan view. The rigidity of the extending portion can be set relatively high, and the installation space for the extending portion can be reduced.

The bumper structure for a vehicle provided with the pedestrian collision detection device according to claim 5 is set such that in the invention according to claim 4 , the plate thickness dimension of the extending portion becomes thicker toward the outside in the vehicle width direction. Has been.

In the vehicle bumper structure including the pedestrian collision detection device according to the fifth aspect , the plate thickness dimension of the extending portion is set so as to increase toward the outer side in the vehicle width direction. Thereby, even when the outer end portion in the vehicle width direction of the extending portion is pressed inward in the vehicle front-rear direction by the bumper cover, the outer portion in the vehicle width direction of the sensor member is favorably bent and deformed inward in the vehicle front-rear direction by the extending portion. Can be made.

According to the bumper structure for a vehicle provided with the pedestrian collision detection device according to claim 1 and claim 2 , a space-efficient bumper structure can be realized.

According to the vehicle bumper structure including the pedestrian collision detection device according to the third aspect , for example, the extension portion can be disposed corresponding to the outer side portion of the bumper cover in the vehicle width direction.

According to the vehicle bumper structure provided with the pedestrian collision detection device according to the fourth aspect , the rigidity of the extension portion can be set to be relatively high, and the installation space of the extension portion can be reduced.

According to the vehicle bumper structure including the pedestrian collision detection device according to claim 5 , even when the vehicle width direction outer side end portion of the extension portion is pressed inward in the vehicle front-rear direction by the bumper cover. Thus, the vehicle width direction outer side portion of the sensor member can be favorably bent and deformed inward in the vehicle front-rear direction.

  According to the vehicle bumper structure including the pedestrian collision detection device according to the fifth aspect, the extension portion can be provided with a simple configuration in the vehicle including the chamber member.

It is the partially broken top view which shows typically the whole front bumper to which the bumper structure for vehicles provided with the collision determination system which concerns on 1st Embodiment was applied. FIG. 2 is an enlarged side cross-sectional view (cross-sectional view taken along line 2-2 in FIG. 1) of the vehicle bumper direction center portion of the front bumper shown in FIG. 1. FIG. 3 is an enlarged side cross-sectional view (cross-sectional view taken along line 3-3 in FIG. 1) of an outer portion in the vehicle width direction of the front bumper shown in FIG. 1. FIG. 2 is a partially cutaway plan sectional view schematically showing a state where a corner portion of a bumper cover shown in FIG. 1 collides with a pedestrian. It is the plane sectional view corresponding to Drawing 1 which fractured partially showing the variation of the extension part in a 1st embodiment typically. It is the partially broken top view which shows typically the corner part of the front bumper to which the bumper structure for vehicles provided with the collision determination system which concerns on 2nd Embodiment was applied. FIG. 7 is an enlarged side cross-sectional view (cross-sectional view taken along line 7-7 in FIG. 6) of the outer side portion of the pressure tube shown in FIG. 6 in the vehicle width direction. FIG. 10 is a plan view corresponding to FIG. 6 that is a partially broken view schematically showing a corner portion of a front bumper to which a vehicle bumper structure including a collision determination system according to a third embodiment is applied.

(First embodiment)

  Hereinafter, the front bumper 12 to which the vehicle bumper structure S1 including the collision determination system 10 according to the first embodiment is applied will be described with reference to FIGS. The collision determination system 10 corresponds to the pedestrian collision detection device of the present invention. In addition, an arrow FR appropriately shown in the drawings indicates the front side of the vehicle, an arrow LH indicates the left side of the vehicle (one side in the vehicle width direction), and an arrow UP indicates the upper side of the vehicle.

  As shown in FIG. 1, the front bumper 12 is disposed at the front end of the vehicle (automobile), and the collision determination system 10 determines whether or not the front bumper 12 has collided with the front bumper 12. 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 by the vehicle body across the front ends of a pair of left and right front side members 16 constituting a skeleton member on the vehicle body side. Further, both side portions in the vehicle width direction of the bumper R / F 14 slightly protrude outward in the vehicle width direction with respect to the front side member 16, and corner portions on the vehicle front side at both ends in the vehicle width direction of the bumper R / F 14. 14A has an angle R in plan view.

  A chamber member 20 as a “sensor member” made of a resin material is provided on the vehicle front-rear direction outer side of the bumper R / F 14, that is, the vehicle front side. The chamber member 20 has a longitudinal length in the vehicle width direction. It is formed in a scale. The chamber member 20 includes a chamber body 22 and extending portions 24 that constitute both side portions of the chamber member 20 in the longitudinal direction.

  As shown in FIG. 2, the chamber body 22 is configured as a hollow structure whose longitudinal direction is the vehicle width direction, and the internal space of the chamber body 22 is a pressure chamber 26. The chamber body 22 is fixedly attached to the front surface 14B (vehicle front-rear direction outer surface) of the bumper R / F 14, and both longitudinal ends of the chamber body 22 are arranged in the vehicle width with respect to the bumper R / F 14. It protrudes outward in the direction.

  The chamber member 20 is rigidly attached to the bumper R / F 14 in the chamber main body 22 and has a rigidity capable of maintaining the shape thereof. A communication hole communicated with the atmosphere. Accordingly, normally (statically) the pressure chamber 26 is at atmospheric pressure. The chamber member 20 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 26 is reduced while dynamically changing the internal pressure of the pressure chamber 26. It has become.

  Further, in the chamber member 20, after the chamber member 20 is formed into a hollow structure by blow molding or the like, both side portions in the vehicle width direction of the chamber member 20 are crushed from the front side of the vehicle by compression molding or the like to be formed into a plate shape. ing. And the part formed in this plate shape is made into the extension part 24. FIG. That is, the extending part 24 extends outward from the rear part at both longitudinal ends of the chamber body part 22 in the vehicle width direction. The extension 24 extends in the vehicle width direction on the outer side of the bumper R / F 14 in the vehicle width direction, and is inclined to the vehicle rear side as it goes outward in the vehicle width direction in plan view. The extending portion 24 is arranged with the direction orthogonal to the extending direction of the extending portion 24 in plan view (see FIG. 3), and the plate thickness dimension of the extending portion 24 is as follows. It is set constant.

  Furthermore, when a load on the vehicle longitudinal direction inner side, that is, the vehicle rear side, acts on the extending portion 24, the vehicle width direction outer side portion of the chamber main body portion 22 starts from a contact portion with the corner portion 14 </ b> A of the bumper R / F 14. The rigidity of the extending portion 24 is ensured so as to bend and deform toward the vehicle rear side.

  On the other hand, as shown in FIG. 2, the chamber member 20 is provided with a pressure sensor 28 (in a broad sense, an element grasped as a “detector”). It is electrically connected to the ECU 30 as a “part”. Then, the pressure sensor 28 outputs a signal corresponding to the pressure in the pressure chamber 26 to the ECU 30. Thereby, the “sensor member” of the present invention includes the chamber member 20 and the pressure sensor 28.

  The ECU 30 is configured to calculate a collision load based on the output signal of the pressure sensor 28. The ECU 30 is electrically connected with a collision speed sensor (not shown). The collision speed sensor outputs a signal corresponding to the collision speed with the collision body to the ECU 30, and the ECU 30 calculates the collision speed based on the output signal of the collision speed sensor. Then, the ECU 30 calculates the effective mass of the collision object from the calculated collision load and collision speed, determines whether the effective mass exceeds a threshold value, and determines whether the collision object to the front bumper 12 is a pedestrian. Whether it is a person other than a pedestrian (for example, a roadside marker, a post cone, etc.) is determined.

  Further, an absorber 32 is provided on the vehicle front side of the bumper R / F 14 on the vehicle lower side of the chamber main body 22 in the chamber member 20. The absorber 32 is made of a foamed resin material, that is, urethane foam. The absorber 32 is formed in a long shape with the vehicle width direction as a longitudinal direction, and is formed in a substantially rectangular shape in a side sectional view. The absorber 32 is arranged along the bumper R / F 14 in plan view, and fixed (contacted) to the front surface 14B of the bumper R / F 14 at the rear end portion.

  Furthermore, the front bumper 12 includes a bumper cover 34 made of a resin material or the like. The bumper cover 34 is disposed so as to face both the chamber member 20 and the absorber 32 on the vehicle front side, and is fixedly supported to the vehicle body at a portion not shown. Further, both side portions of the bumper cover 34 in the vehicle width direction are curved toward the rear side of the vehicle toward the outer side in the vehicle width direction in plan view, and the above-described chambers are formed on the vehicle rear side of both sides of the bumper cover 34 in the vehicle width direction. An extending portion 24 of the member 20 is disposed.

  Next, functions and effects in the present embodiment will be described.

  In the front bumper 12 configured as described above, when the bumper cover 34 collides with a pedestrian (a leg portion thereof) at the intermediate portion in the vehicle width direction, the bumper cover 34 is deformed to the chamber member 20 side, and the chamber member 20 chamber body portions 22 are pressed. As a result, the chamber body 22 is compressed and deformed in the vehicle front-rear direction, and the pressure in the pressure chamber 26 changes.

  Then, the pressure sensor 28 outputs a signal corresponding to the pressure change of the pressure chamber 26 to the ECU 30, and the ECU 30 calculates the collision load based on the output signal of the pressure sensor 28. Further, the ECU 30 calculates the collision speed based on the output signal of the collision speed sensor. Thereby, ECU30 calculates | requires the effective mass of a collision body from the calculated collision load and collision speed, judges whether an effective mass exceeds a threshold value, and the collision body to the front bumper 12 is a pedestrian. It is determined whether or not.

  Here, in the present embodiment, the chamber member 20 is provided with the extending portion 24, and the extending portion 24 extends in the vehicle width direction on the outer side of the bumper R / F 14 in the vehicle width direction. When the corner portion of the vehicle (the outer portion in the vehicle width direction of the bumper cover 34) collides with a pedestrian (its leg portion), the outer portion in the vehicle width direction of the bumper cover 34 is deformed to the vehicle rear side and extends. The part 24 is pressed to the vehicle rear side. As a result, as shown in FIG. 4, the extending portion 24 is displaced toward the vehicle rear side, and the vehicle width direction outer side portion of the chamber main body portion 22 starts from the contact portion with the corner portion 14 </ b> A of the bumper R / F 14. Bends and deforms toward the rear of the vehicle. As a result, the pressure in the pressure chamber 26 changes, and the ECU 30 determines whether or not the collision object against the front bumper 12 is a pedestrian, as described above.

  Thus, in the collision between the pedestrian and the bumper cover 34 at the corner portion of the vehicle, the extending portion 24 causes the vehicle width direction outer side portion of the chamber member 20 (chamber main body portion 22) to bend and deform so that the vehicle is a pedestrian. It can be determined whether or not it collided with. For this reason, unlike the prior art, it is not necessary to arrange a spacer for compressing and deforming the chamber member 20 on the back surface of the bumper cover 34. Therefore, in the vehicle bumper structure S1 including the collision determination system 10, a space-efficient bumper structure can be realized.

  Further, the extending portion 24 is inclined toward the vehicle width direction outer side and the vehicle rear side in a plan view. For this reason, the extension part 24 can be arrange | positioned corresponding to the corner part (vehicle width direction outer side part) of the bumper cover 34. FIG.

  Furthermore, the extending part 24 is formed in a plate shape in which the direction orthogonal to the extending direction of the extending part 24 in the plan view is the plate thickness direction. For this reason, while the rigidity of the extension part 24 can be set comparatively high, the installation space of the extension part 24 in planar view can be made small.

  Further, the extending portion 24 is provided integrally with the chamber member 20. Thereby, the extension part 24 can be provided in the chamber member 20 with a simple structure with respect to the vehicle provided with the chamber member 20.

  Further, the corner R of the bumper R / F 14 has an angle R in plan view. Therefore, for example, by appropriately changing the radius of the corner R, the bending deformation load when the chamber member 20 is bent and deformed can be adjusted. Further, since the corner R is formed in the corner portion 14A of the bumper R / F 14, the damage to the chamber member 20 can be prevented or suppressed.

  In the first embodiment, the extending part 24 is provided integrally with the chamber member 20 (chamber body part 22). Alternatively, the extending portion 24 may be configured separately from the chamber member 20 (chamber main body portion 22), and the extending portion 24 may be configured to be attached to the chamber member 20 (chamber main body portion 22). .

(Variation of the first embodiment)

  Variations of the front bumper 12 of the first embodiment will be described with reference to FIG. In this variation, the shape of the extending portion 24 and the plate thickness dimension of the extending portion 24 are changed with respect to the first embodiment.

  That is, the intermediate portion in the longitudinal direction of the extending portion 24 is bent so as to protrude toward the vehicle front side in a plan view. For this reason, the vehicle width direction outer side part of the extension part 24 can be arrange | positioned so that the bumper cover 34 may be met.

  Further, the plate thickness dimension of the extending portion 24 is set so as to become thicker toward the outer side in the vehicle width direction. Thus, even when the vehicle width direction outer side end portion of the extending portion 24 is pressed to the vehicle rear side by the bumper cover 34, the extending portion 24 favorably bends and deforms the vehicle width direction outer side portion of the chamber main body portion 22. be able to. This will be described in comparison with the following comparative example.

  In the comparative example, the plate thickness dimension of the extending portion 24 is set to be thinner toward the outer side in the vehicle width direction. That is, the plate thickness dimension t2 of the extending portion 24 on the outer side in the vehicle width direction is set to be thinner than the plate thickness dimension t1 on the inner side of the extending portion 24 in the vehicle width direction. For this reason, in the comparative example, the vehicle width direction outer side part of the extension part 24 becomes easy to bend. Thereby, when the vehicle width direction outer side edge part of the extension part 24 is pressed to the vehicle rear side, although the bending deformation amount in the vehicle width direction outer side part of the extension part 24 becomes large, The amount of bending deformation in the inner part in the vehicle width direction is reduced. As a result, in the comparative example, there is a possibility that the outer portion of the chamber member 20 (chamber body 22) in the vehicle width direction cannot be bent and deformed satisfactorily.

  On the other hand, in this variation, the plate thickness dimension of the extending portion 24 is set so as to increase toward the outer side in the vehicle width direction. That is, the plate thickness dimension t2 on the outer side in the vehicle width direction of the extending portion 24 is set to be thicker than the plate thickness dimension t1 on the inner side in the vehicle width direction of the extending portion 24. For this reason, the vehicle width direction inner side part of the extending part 24 can be easily configured while the bending rigidity of the extending part 24 is relatively high. Thereby, when the vehicle width direction outer side edge part of the extension part 24 is pressed to the vehicle rear side, compared with the said comparative example, the bending deformation amount in the vehicle width direction inner side part of the extension part 24 becomes large. Therefore, the vehicle width direction outer side portion of the chamber member 20 (chamber main body portion 22) can be favorably bent and deformed.

(Second Embodiment)

  Hereinafter, the front bumper 102 to which the vehicle bumper structure S <b> 2 including the collision determination system 100 according to the second embodiment is applied will be described with reference to FIGS. 6 and 7. The front bumper 102 is configured in the same manner as the front bumper 12 of the first embodiment except for the following points.

  That is, in the second embodiment, a pressure tube 104 as a substantially long “sensor member” is provided instead of the chamber member 20 of the first embodiment. The pressure tube 104 is fixed to the front surface 14B in the upper portion (upper half portion) of the bumper R / F 14 with the longitudinal direction being the vehicle width direction. The pressure tube 104 is configured as a hollow structure having a substantially annular cross section. Moreover, the vehicle width direction outer side edge part of the pressure tube 104 is arrange | positioned rather than the vehicle width direction outer side edge part of bumper R / F14 at the vehicle width direction outer side. A pressure sensor 28 (not shown in FIGS. 6 and 7) is connected to the pressure tube 104. When the pressure tube 104 is deformed, a signal corresponding to a pressure change in the pressure tube 104 is sent to the pressure sensor. 28 is output to the ECU 30.

  Moreover, the absorber 32 is being fixed to the front surface 14B of bumper R / F14 so that the pressure tube 104 may be covered. Thus, the pressure tube 104 is compressed and deformed in the vehicle front-rear direction by the absorber 32 being pressed by the bumper cover 34 that is deformed toward the vehicle rear side in the event of a collision. The outer end of the absorber 32 in the vehicle width direction is disposed on the outer side in the vehicle width direction of the bumper R / F 14 and on the inner side in the vehicle width direction of the outer end of the pressure tube 104 in the vehicle width direction. Has been.

  Furthermore, in the second embodiment, the extending portion 24 is configured separately from the pressure tube 104, and the vehicle width direction outer side end portion of the pressure tube 104 extends through the clamp member 106. It is attached to 24 inner ends in the vehicle width direction. Further, the vehicle width direction inner side end portion of the extending portion 24 is fixed to the front surface 14B at the vehicle width direction outer side end portion of the bumper R / F 14, and the extension portion 24 is the vehicle width direction outer side end of the bumper R / F 14. It protrudes from the portion to the outside in the vehicle width direction. Accordingly, a part of the extending portion 24 extends in the vehicle width direction on the outer side in the vehicle width direction with respect to the bumper R / F 14. Further, the intermediate portion in the longitudinal direction of the extending portion 24 is bent so as to protrude toward the vehicle front side, and the plate thickness dimension of the extending portion 24 is set so as to increase toward the outer side in the vehicle width direction. Yes.

  And if the load to the vehicle rear side acts on the extension part 24, the extension part 24 will bend and deform | transform to the vehicle rear side from the site | part which contacts the corner | angular part 14A of bumper R / F14, and the pressure tube 104 The outer end in the vehicle width direction is bent and deformed toward the vehicle rear side. Thereby, also in 2nd Embodiment, there exists an effect | action and effect similar to 1st Embodiment.

(Third embodiment)

  Hereinafter, the front bumper 202 to which the vehicle bumper structure S3 including the collision determination system 200 according to the third embodiment is applied will be described with reference to FIG. The front bumper 202 is configured similarly to the front bumper 102 of the second embodiment except for the following points.

  That is, in the third embodiment, an optical fiber sensor 204 as a “sensor member” is provided in place of the pressure tube 104 of the second embodiment. The optical fiber sensor 204 includes a stress concentrating plate 206, an optical fiber 208 in contact with the front surface of the stress concentrating plate 206, and a mold member 210 that molds the optical fiber 208 and the stress concentrating plate 206. Yes. In FIG. 8, for convenience, the stress concentration plate 206, the optical fiber 208, and the mold member 210 are not hatched.

  The front portion of the stress concentration plate 206 is formed in an uneven shape in plan view, and the stress concentration plate 206 has a plurality of convex portions. The optical fiber 208 is configured as a long and flexible member, and is folded (U-turned) in the middle in the longitudinal direction, and arranged in two upper and lower stages in front view. The optical fiber 208 is disposed adjacent to the convex portion of the stress concentration plate 206. In addition, a light emitting circuit (not shown) for irradiating light is provided at one end of the optical fiber 208, and a light receiving circuit (for receiving light emitted from the light emitting unit) is provided at the other end of the optical fiber 208. (Not shown) is provided. These light emitting circuit and light receiving circuit are electrically connected to the ECU 30 (not shown in FIG. 8). Then, the light emitted from the light emitting circuit is transmitted through the optical fiber 208 and received by the light receiving circuit, and then is photoelectrically converted, converted into an electric signal corresponding to the light intensity, and output to the ECU 30. It has become. Thereby, based on the signal output to ECU30 from the optical fiber sensor 204, ECU30 determines whether the collision body with the front bumper 12 is a pedestrian.

  In addition, protrusions 212 are provided at the corners 14A at both ends in the vehicle width direction of the bumper R / F 14, and the protrusions 212 protrude from the bumper R / F 14 to the vehicle front side.

  The extending portion 24 is configured separately from the optical fiber sensor 204 and extends in the vehicle width direction outside the bumper R / F 14 in the vehicle width direction. The vehicle width direction inner end of the extension 24 is disposed between the vehicle width direction outer end of the bumper R / F 14 and the vehicle width direction outer end of the optical fiber sensor 204, and the optical fiber sensor 204. The bumper R / F 14 is attached by a clamp member 106 together with the outer end portion in the vehicle width direction.

  And if the load to the vehicle rear side acts on the extension part 24, the extension part 24 will bend and deform | transform to the vehicle rear side from the part which contacts the protrusion 212 of bumper R / F14, and the optical fiber sensor 204 The outer end in the vehicle width direction is bent and deformed toward the vehicle rear side. Thereby, also in 3rd Embodiment, there exists an effect | action and effect similar to 2nd Embodiment.

  In the third embodiment, the extending portion 24 is provided separately from the optical fiber sensor 204. Instead of this, the stress concentration plate 206 of the optical fiber sensor 204 may be extended outward in the vehicle width direction, and the extended portion may be used as the extended portion 24. In this case, the protrusion 212 of the bumper R / F 14 may be omitted, and the protrusion 212 may be provided on the stress concentration plate 206.

  Furthermore, in the second and third embodiments, both ends of the pressure tube 104 and the optical fiber sensor 204 in the vehicle width direction are outside of the bumper R / F 14 in the vehicle width direction. Is arranged. Instead, both ends of the pressure tube 104 and the optical fiber sensor 204 in the vehicle width direction may be disposed on the inner side in the vehicle width direction with respect to both ends of the bumper R / F 14 in the vehicle width direction. In other words, when the extending portion 24 is bent and deformed toward the vehicle rear side, the outer portion of the pressure tube 104 and the optical fiber sensor 204 in the vehicle width direction may be bent and deformed toward the vehicle rear side.

  In the first embodiment and the second embodiment, the corner R of the bumper R / F 14 is formed with a corner R in plan view, but the corner 14A of the bumper R / F 14 is perpendicular to the corner 14A. It may be formed.

Furthermore, in the first to third embodiments, the example in which the collision determination systems 10, 100, and 200 are applied to the front bumpers 12, 102, and 202 has been described. However, the present invention is not limited to this. Instead, for example, the above configurations may be reversed and applied to the rear bumper.

10 Collision determination system (pedestrian collision detection device)
14 Bumper reinforcement 20 Chamber member (sensor member)
24 Extension part 26 Pressure chamber 34 Bumper cover 100 Collision determination system (pedestrian collision detection device)
104 Pressure tube (sensor member)
200 Collision determination system (pedestrian collision detection device)
204 Optical fiber sensor (sensor member)
S1 Bumper structure for vehicle S2 Bumper structure for vehicle S3 Bumper structure for vehicle

Claims (5)

A bumper reinforcement arranged with the vehicle width direction as the longitudinal direction is disposed adjacent to the vehicle front-rear direction outer side surface, and is configured by a chamber member formed in a long shape with the vehicle width direction as the longitudinal direction. A sensor member whose output changes by
The chamber member constitutes an intermediate portion in the longitudinal direction, and both end portions in the longitudinal direction protrude outward in the vehicle width direction with respect to corners on the vehicle longitudinal direction outer side at both ends in the vehicle width direction of the bumper reinforcement, and A chamber body disposed adjacent to the vehicle longitudinal direction outside;
A collision determination unit that determines whether or not the vehicle has collided with a pedestrian based on a signal output by the sensor member;
A bumper cover arranged with the vehicle width direction as the longitudinal direction outside the sensor member in the vehicle longitudinal direction;
The bumper cover that constitutes both longitudinal end portions of the chamber member, extends from the vehicle longitudinal direction inner portion at both longitudinal end portions of the chamber main body portion to the vehicle width direction outer side, and is deformed to the vehicle longitudinal direction inner side at the time of a collision An extension part that bends and deforms the vehicle width direction outer side part of the chamber main body part inward in the vehicle front-rear direction by being pressed by
The bumper structure for vehicles provided with the pedestrian collision detection apparatus which has this. A bumper reinforcement arranged with the vehicle width direction as the longitudinal direction is arranged adjacent to the vehicle front-rear direction outer side surface, and is configured by a pressure tube or an optical fiber sensor formed in a long shape with the vehicle width direction as the longitudinal direction. In addition, the sensor member whose both ends in the longitudinal direction protrude outward in the vehicle width direction with respect to the bumper reinforcement and changes its output by being deformed,
A collision determination unit that determines whether or not the vehicle has collided with a pedestrian based on a signal output by the sensor member;
A bumper cover arranged with the vehicle width direction as the longitudinal direction outside the sensor member in the vehicle longitudinal direction;
The bumper reinforcement extends in the vehicle width direction on the vehicle width direction outer side of the bumper reinforcement, and is disposed adjacent to the vehicle longitudinal direction inner side with respect to the longitudinal direction both ends of the sensor member. An extension that is fixed to the vehicle front-rear direction outer surface of the bumper reinforcement and is bent by the vehicle width direction outer side portion of the sensor member inward in the vehicle front-rear direction by being pressed by the bumper cover that is deformed inward in the vehicle front-rear direction in the event of a collision. And
The bumper structure for vehicles provided with the pedestrian collision detection apparatus which has this. The bumper structure for a vehicle provided with the pedestrian collision detection device according to claim 1 or 2, wherein the extending portion is inclined in the vehicle width direction outer side and the vehicle front-rear direction inner side in plan view. The extension portion is formed in a plate shape and arranged in a plate thickness direction in a direction orthogonal to the extension direction of the extension portion in plan view. A bumper structure for a vehicle comprising the pedestrian collision detection device according to claim 1. The bumper structure for vehicles provided with the pedestrian collision detection apparatus of Claim 4 set so that the plate | board thickness dimension of the said extension part may become thick as it goes to the vehicle width direction outer side.

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