JP2015140113A - vehicle bumper structure - Google Patents

Abstract

An object of the present invention is to provide a vehicle bumper structure capable of detecting a collision of a collision object when a light collision object such as a leg of a pedestrian collides with the vicinity of a vehicle headlamp. A front bumper 12 having a vehicle bumper structure S1 has a pressure tube 18 disposed along a vehicle width direction on the vehicle front side of the bumper reinforcement 14 and a pressure on the vehicle front side of the bumper reinforcement 14. And an absorber 20 disposed with the tube 18 interposed therebetween. A daylight 26 is provided at both ends of the vehicle in the vehicle width direction above the pressure tube 18, and a front end portion 26 </ b> A of the daylight 26 is disposed on the vehicle front side from the pressure tube 18 in a cross-sectional view of the vehicle. In addition, the daylight 26 is configured to be able to make a stroke toward the rear of the vehicle at the time of a collision. A protrusion 28 is integrally provided at the lower part of the daylight 26, and the protrusion 28 presses the pressure tube 18 as the daylight 26 moves rearward of the vehicle at the time of a collision. [Selection] Figure 1

Description

  The present invention relates to a vehicle bumper structure.

  The following Patent Document 1 discloses a structure in which a recess is formed along the vehicle width direction on the front surface of an energy absorbing material (absorber) disposed on the front side of a bumper reinforcement, and a collision sensor is disposed in the recess. Has been. In this structure, the headlamp above the front bumper is rotatably attached to the bumper reinforcement using a mounting bracket. Thus, in response to an input of a predetermined value or more at the time of a front collision, the outer end in the vehicle width direction of the mounting bracket is rotated backward with the inner end in the vehicle width direction of the mounting bracket as a fulcrum. Yes. In addition, there exist some which were described in patent document 2, 3 as a structure provided with the collision detection sensor.

JP 2006-240391 A JP 2007-0669707 A International Publication No. 2011/128971

  When the structure described in Patent Document 1 is applied to a daylight running lamp (Daytime Running Lamps) or a vehicle in which the front end portion of the headlamp is arranged on the front side of the vehicle with respect to the collision sensor, When a light collision object collides, it is difficult to stroke the daylight or the headlamp sufficiently. For this reason, it is difficult to transmit the collision load to the collision sensor.

  In consideration of the above-described facts, the present invention provides a vehicle bumper structure capable of detecting a collision of a collision object when a light collision object such as a pedestrian's leg collides near the vehicle headlamp. For the purpose.

  The bumper structure for a vehicle according to the first aspect of the invention is arranged along the vehicle width direction on the front side in the vehicle front-rear direction of the bumper reinforcement extending along the vehicle width direction, and is output when pressed. A pedestrian collision detection sensor that changes, an absorber that is provided on the vehicle front side of the bumper reinforcement, and is disposed with the pedestrian collision detection sensor interposed between the bumper reinforcement and a vehicle front portion Provided at both ends of the vehicle in the vehicle width direction and disposed on the vehicle upper side with respect to the pedestrian collision detection sensor, and the front end portion in the vehicle front-rear direction in the vehicle side sectional view is in front of the vehicle with respect to the pedestrian collision detection sensor. A vehicle headlamp that is arranged on the side and configured to be able to stroke toward the rear of the vehicle at the time of a collision, and is integrally provided in a lower portion of the vehicle headlamp in the vehicle vertical direction, Having a protrusion for pressing the pedestrian collision detection sensor wherein with the rearward movement of the vehicle headlamp in the collision.

  According to the first aspect of the present invention, the absorber is provided on the vehicle front side of the bumper reinforcement, and the pedestrian collision detection sensor is interposed between the bumper reinforcement and the absorber. At both ends of the vehicle front in the vehicle width direction, vehicle headlamps are disposed above the vehicle relative to the pedestrian collision detection sensor, and the front end of the vehicle headlamps walk in the vehicle side sectional view. It is arranged on the vehicle front side of the person collision detection sensor. The vehicle headlamp is configured to be able to stroke toward the rear of the vehicle at the time of a collision. As a result, when a colliding body such as a pedestrian's leg collides with the vicinity of the vehicle headlamp at both ends in the vehicle width direction (bumper corner portion) of the vehicle front, the vehicle headlamp moves to the rear of the vehicle, The protrusion part integrally provided in the vehicle vertical direction lower part of the vehicle headlamp presses the pedestrian collision detection sensor as the vehicle headlamp moves. As a result, even when a collision object such as a pedestrian's leg collides with the vicinity of the vehicle headlamp, a collision with the collision object can be detected. Further, since the vehicle headlamp moves to the rear of the vehicle at the time of a collision, the impact can be absorbed by the absorber, and the pedestrian's leg protection performance can be ensured.

  According to a second aspect of the present invention, in the vehicle bumper structure according to the first aspect, the absorber is attached to a front surface of the bumper reinforcement in the front-rear direction of the vehicle, and an upper side in the front-rear direction of the vehicle is cut off. And a lower part in which the rear side in the vehicle front-rear direction is weaker than the front side, and the pedestrian collision detection sensor is disposed in the upper part.

  According to the second aspect of the present invention, the absorber includes an upper part in which the upper side in the vehicle vertical direction is cut forward in the front-rear direction of the vehicle, and the pedestrian collision detection sensor is disposed on the upper part of the absorber. As a result, the protrusion pushes the pedestrian collision detection sensor through the upper part of the absorber due to the movement of the vehicle headlamp toward the rear of the vehicle during a collision. For this reason, the pedestrian collision detection sensor can be deformed at a high position above the absorber, and the collision detection performance of a pedestrian who falls to the hood side at the time of the collision can be further improved. The lower part of the absorber protrudes forward of the vehicle from the upper part, and the rear side in the vehicle front-rear direction is weaker than the front part. By absorbing collision energy at the lower part of the absorber, the leg part of the pedestrian The protection performance can be further improved.

  According to a third aspect of the present invention, in the vehicle bumper structure according to the second aspect, the front surface in the vehicle front-rear direction of the lower portion of the absorber is a front end in the vehicle front-rear direction of the vehicle headlamp in a vehicle side sectional view. It is located at the same position as the front end portion of the vehicle headlamp in the vehicle front-rear direction, in front of the vehicle or on the vehicle front side.

  According to the third aspect of the present invention, the front surface of the lower portion of the absorber in the vehicle side sectional view is the same as the front end portion of the vehicle headlamp or the front end portion of the vehicle headlamp. Since the pedestrian's legs hit the vehicular headlamp at the time of a collision, the absorber is pressed through the bumper cover or the like almost at the same time when hitting the vehicular headlamp. For this reason, a leg part's leg protection performance can be improved more reliably.

  According to a fourth aspect of the present invention, in the vehicle bumper structure according to any one of the first to third aspects, the vehicle headlamp is a daylight, and the vehicle front-rear direction of the daylight is The headlamp disposed on the vehicle rear side of the front end of the vehicle and the daylight are separate structures, and the pedestrian collision detection sensor detects between the daylight and the headlamp. The vehicle front-rear direction stroke more than the required stroke is set.

  According to the fourth aspect of the present invention, the protrusion is integrally provided at the lower part of the daylight, and the headlamp and the daylight are disposed on the vehicle rear side of the front end of the daylight. Is a separate structure. At that time, since the vehicle front-rear direction stroke more than the stroke required for detection by the pedestrian collision detection sensor is set between the daylight and the headlamp, the daylight will contact the headlamp at the time of collision. Without moving, the pedestrian collision detection sensor can be pressed by the protrusion.

  As described above, the vehicle bumper structure according to the first aspect of the present invention detects a collision of a collision object when a light collision object such as a pedestrian's leg collides with the vicinity of the vehicle headlamp. It has an excellent effect of being able to.

  The bumper structure for a vehicle according to the second aspect of the present invention has an excellent effect that the collision detection performance of a pedestrian who falls to the hood side at the time of a collision can be improved.

  The vehicle bumper structure according to the third aspect of the present invention has an excellent effect that the collision detection performance of a pedestrian who falls to the hood during a collision can be improved more reliably.

  The vehicle bumper structure according to the fourth aspect of the present invention is excellent in that the daylight can move to the rear of the vehicle without contacting the headlamp at the time of collision, and the pedestrian collision detection sensor can be pressed by the protrusion. It has the effect.

It is a sectional side view showing the vehicle width direction outside end part of the front bumper to which the bumper structure for vehicles concerning one embodiment was applied. FIG. 2 is a side sectional view showing an enlarged state of an outer portion in the vehicle width direction of the front bumper shown in FIG. 1. It is a sectional side view which shows typically the state which the front bumper shown in FIG. 1 collided with the collision body.

  Hereinafter, an embodiment of a vehicle bumper structure according to the present invention will be described with reference to FIGS. Note that an arrow FR appropriately shown in the drawings indicates the vehicle front side, and an arrow UP indicates the vehicle upper side.

  FIG. 1 is a side sectional view showing one end side in the vehicle width direction of the front portion of a vehicle to which the vehicle bumper structure according to the present embodiment is applied. FIG. 2 is a side sectional view showing an enlarged one end portion in the vehicle width direction of the front portion of the vehicle shown in FIG. 1 and 2, only one end side in the vehicle width direction of the front portion of the vehicle 10 is shown. However, since the vehicle bumper structure is symmetrical, the vehicle width direction and the like of the front portion of the vehicle 10 are also shown. The end side is almost the same.

  As shown in FIG. 1, a front bumper 12 to which the vehicle bumper structure S <b> 1 of the present embodiment is applied is provided at the front of a vehicle 10 of an automobile. The front bumper 12 includes a bumper reinforcement 14 which is a bumper skeleton member. The bumper reinforcement 14 is made of, for example, an iron-based or aluminum-based metal material (in FIG. 1, extrusion molding of an aluminum-based metal) and is configured as a skeleton member extending along the vehicle width direction. . The bumper reinforcement 14 is bridged between the front end portions of a pair of left and right front side members (not shown) constituting the skeleton member on the vehicle body side. Moreover, although illustration is abbreviate | omitted, the vehicle width direction both sides part of the bumper reinforcement 14 is inclined to the vehicle rear side toward the vehicle width direction both sides by planar view.

  As shown in FIGS. 1 and 2, the front bumper 12 includes a pressure tube 18 as a pedestrian collision detection sensor disposed on the vehicle front side of the bumper reinforcement 14. The front bumper 12 includes an absorber 20 disposed on the vehicle front side of the bumper reinforcement 14, and a pressure tube 18 is interposed between the absorber 20 and the bumper reinforcement 14.

  In the bumper corner portion on the outer side in the vehicle width direction of the front bumper 12, the pressure tube 18 is provided on the upper side in the vehicle vertical direction of the front surface 14A of the bumper reinforcement 14 (a position corresponding to a part of the upper half portion). . The pressure tube 18 has a substantially long shape, and is disposed with the vehicle width direction as a longitudinal direction. The pressure tube 18 is formed of a resin material and is configured as a hollow structure having a substantially cylindrical cross section. The pressure tube 18 can be crushed and deformed by pressing from the outside.

  In the present embodiment, the position of the pressure tube 18 in the vehicle vertical direction at the vehicle width direction central portion of the front bumper 12 is not limited. However, for example, in consideration of collision detection performance, the vehicle width direction central portion of the pressure tube 18 is It is preferable to arrange the front surface 14A of the bumper reinforcement 14 on the lower side in the vehicle vertical direction (a position corresponding to a part of the lower half portion).

  The absorber 20 is formed of a foamed resin material, and for example, urethane foam or the like is used. In the bumper corner portion of the front bumper 12, the absorber 20 has an upper portion 20 </ b> A in which the upper side in the vehicle vertical direction in the front and rear direction of the vehicle is cut (notched) and a front surface 22 </ b> B in the front and rear direction in the front and rear direction are upper. And a lower portion 20B disposed on the vehicle front side of the front surface 22A of 20A.

  In the bumper corner portion of the front bumper 12, a groove portion 24 recessed toward the vehicle front side is formed in the rear surface portion 22C on the rear side in the vehicle front-rear direction of the upper portion 20A of the absorber 20 (see FIG. 2). The groove portion 24 is disposed substantially along the vehicle width direction, and the pressure tube 18 is inserted into the groove portion 24. In the present embodiment, the groove portion 24 is formed in the rear surface portion 22C of the upper portion 20A of the absorber 20 at the bumper corner portion of the front bumper 12. However, as described above, at the center portion in the vehicle width direction, the lower portion of the absorber 20 is formed. It is preferable to provide the groove 24 on the side.

  The lower portion 20B of the absorber 20 is a substantially platform in which the length in the vehicle vertical direction of the rear surface portion 22C (the rear surface portion 22C corresponding to the lower portion 20B) is set longer than the length in the vehicle vertical direction of the front surface 22B in a vehicle side sectional view. It is a shape. The lower portion 20B of the absorber 20 is provided with a concave groove 22D that is recessed from the rear surface portion 22C toward the vehicle front side. In other words, the lower portion 20B of the absorber 20 has a substantially U shape with a cross section opened to the vehicle rear side. The concave groove 22D is formed substantially along the vehicle width direction. By forming the concave groove 22D, the rear side of the lower portion 20B of the absorber 20 in the vehicle front-rear direction is weaker than the front side. As a result, when the bumper corner portion of the front bumper 12 collides with the pedestrian's leg portion, the impact is absorbed by the lower portion 20B of the absorber 20, thereby ensuring the pedestrian's leg protection performance. .

  In the present embodiment, the bottom surface of the concave groove 22D (the vehicle vertical direction surface on the back side of the concave groove 22D) is located on the vehicle front side with respect to the front surface 22A of the upper portion 20A in the vehicle side sectional view. However, the present invention is not limited to this configuration.

  The absorber 20 is attached to the front surface 14 </ b> A of the bumper reinforcement 14 with the pressure tube 18 inserted in the groove 24. Although not shown in the drawings, in the present embodiment, the protrusions provided on both ends of the rear surface portion 22C of the absorber 20 in the vehicle width direction are recessed portions provided on both ends of the front surface 14A of the bumper reinforcement 14 in the vehicle width direction. By being engaged, the rear surface portion 22 </ b> C of the absorber 20 is fixed in a state of being in contact with the front surface 14 </ b> A of the bumper reinforcement 14. In addition, the attachment structure to the bumper reinforcement 14 of the absorber 20 is not limited to this, It can change.

  At both ends in the vehicle width direction of the front portion of the vehicle 10, a daylight running lamps (DRL: Daylight Running Lamps) 26 as a vehicle headlamp is provided above the pressure tube 18. The front end portion 26 </ b> A of the daytime lamp 26 in the vehicle front-rear direction in the vehicle side sectional view is disposed on the vehicle front side with respect to the pressure tube 18. The daylight 26 is formed of a rigid body. The daytime lamp 26 is supported by an attachment portion (not shown) of the front bumper 12 so that it can be stroked rearward of the vehicle when it collides with a collision object. Inside the daylight 26 is provided a lamp lighting unit (not shown) for irradiating the vehicle forward.

  At the lower part of the vehicle daylight 26 in the vertical direction of the vehicle, a projecting portion 28 is provided extending to the vehicle lower side. In the present embodiment, the daylight 26 and the protrusion 28 are configured as separate members, and the upper portion of the protrusion 28 is fixed to the lower part of the casing constituting the daylight 26 so that the daylight 26 and the projecting portion 28 are integrally provided. The projecting portion 28 is disposed on the vehicle front side with respect to the upper portion 20A of the absorber 20 in a vehicle side sectional view, and the lower side of the projecting portion 28 faces the front surface 22A of the upper portion 20A of the absorber 20 in the vehicle front-rear direction. Yes. In the present embodiment, the projecting portion 28 is formed in a substantially rectangular shape in a vehicle side sectional view, and a gap is formed between the rear surface of the projecting portion 28 in the vehicle front-rear direction and the front surface 22A of the upper portion 20A of the absorber 20. ing. As a result, when the bumper corner portion (near the daylight 26) near the front of the vehicle 10 collides with the colliding body, the protrusion 28 is located above the absorber 20 as the daylight 26 moves rearward of the vehicle. The pressure tube 18 is pressed through 20A. In the present embodiment, the daylight 26 and the projection 28 are configured as separate members, but the daylight 26 and the projection 28 may be configured as a single member.

  A bumper cover 32 made of a resin material or the like is provided on the vehicle front side of the absorber 20. The bumper cover 32 is disposed so as to face the absorber 20 with a gap, and is fixedly supported to the vehicle body at a portion not shown. Although not shown in the drawings, both sides of the bumper cover 32 in the vehicle width direction are formed to bend toward the vehicle rear side toward the both sides in the vehicle width direction in plan view. The translucent part on the vehicle front side of the daylight 26 is exposed to the outside of the vehicle from an opening 32 </ b> A provided on the upper side of the bumper cover 32. In the present embodiment, the middle portion of the bumper cover 32 in the vertical direction of the vehicle is curved so as to protrude toward the front side of the vehicle at a position facing the upper portion 20A of the absorber 20 and the protruding portion 28, but is limited to this configuration. It is not something.

  Further, the front surface 22B of the lower portion 20B of the absorber 20 is disposed in front of the vehicle from the front end portion 26A of the daylight 26 in the vehicle side sectional view. Thereby, before a collision object such as a pedestrian's leg hits the front end portion 26A of the daylight 26 at the time of the collision, the lower portion 20B of the absorber 20 is pressed through the bumper cover 32.

  A headlamp 34 is provided on the obliquely rear side of the daylight 26 in the vehicle vertical direction when viewed from the side of the vehicle (see FIG. 1). The headlamp 34 is disposed on the vehicle rear side of the front end portion 26 </ b> A of the daylight 26 in the vehicle side sectional view. The translucent part on the vehicle front side of the headlamp 34 is exposed to the vehicle outer side from an opening 32B formed on the vehicle upper side than the opening 32A of the bumper cover 32.

  The daylight 26 has a separate structure from the headlamp 34, and the daylight 26 and the headlamp 34 are arranged at an interval in the vehicle front-rear direction. The headlamp 34 is fixedly supported to the vehicle body at a portion not shown. Thus, the daytime lamp 26 is configured to be able to stroke in the vehicle direction without coming into contact with the headlamp 34 at the time of collision with the collision object. Further, the daylight 26 and the headlamp 34 have a separate structure and are separated from each other, so that the mass of the daylight 26 is relatively light, and the daylight 26 is rearward of the vehicle when it collides with a collision object. It becomes easy to move to. Between the daylight 26 and the headlamp 34, a stroke in the vehicle front-rear direction that is greater than the stroke required for detection by the pressure tube 18 is set. Further, since the daytime lamp 26 is configured to be able to make a stroke toward the rear of the vehicle at the time of collision with the collision object, the pressure tube 18 is pressed by the protrusion 28 via the upper portion 20A of the absorber 20. Further, the daytime lamp 26 is configured to be able to make a stroke toward the rear of the vehicle, and the lower part 20B of the absorber 20 protrudes toward the front side of the vehicle from the upper part 20A. Stroke to absorb is secured.

  Further, on the lower side of the front portion of the vehicle 10, a lower absorber 36 extending substantially along the vehicle front-rear direction is provided on the vehicle lower side of the absorber 20 and the bumper reinforcement 14. In the present embodiment, the front end portion of the lower absorber 36 is disposed on the vehicle front side of the front surface 22B of the lower portion 20B of the absorber 20 in the vehicle side sectional view, but is not limited to this configuration.

  As shown in FIG. 2, pressure sensors 40 constituting a part of the pedestrian collision detection sensor are connected to both ends of the pressure tube 18 in the vehicle width direction. The pressure sensor 40 is electrically connected to an ECU 42 as a collision determination unit. When the pressure tube 18 is deformed by pressing, a signal corresponding to a pressure change in the pressure tube 18 is output from the pressure sensor 40 to the ECU 42. In the present embodiment, the pressure sensor 40 is fixedly supported by the bumper reinforcement 14.

  The ECU 42 is configured to calculate the collision load based on the output signal of the pressure sensor 40. The ECU 42 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 42, and the ECU 42 calculates the collision speed based on the output signal of the collision speed sensor. Then, the ECU 42 determines 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. It is determined whether the obstacle is on the road (for example, a roadside marker or a post cone). When the ECU 42 determines that the collision body is a pedestrian, it activates a pedestrian active system (not shown) such as a pop-up hood (a structure that lifts the rear of the hood instantaneously to mitigate the impact) and a pedestrian protection airbag. It is like that.

  Next, the operation and effect of this embodiment will be described.

  In the front bumper 12 to which the vehicle bumper structure S1 is applied, an absorber 20 is provided on the vehicle front side of the bumper reinforcement 14. In the bumper corner portion of the front bumper 12, the absorber 20 has a top portion 20A in which the upper side in the vehicle vertical direction in the front and rear direction of the vehicle is cut, and a concave groove 22D that is recessed in the front side of the vehicle in the rear surface portion 22C. And a lower portion 20B formed. A groove portion 24 is formed in the rear surface portion 22 </ b> C of the upper portion 20 </ b> A of the absorber 20, and the pressure tube 18 is inserted into the groove portion 24. On the vehicle width direction both ends of the front part of the vehicle 10, a daylight lamp 26 is disposed on the vehicle upper side from the pressure tube 18.

  A protrusion 28 extending downward from the vehicle is integrally provided at the lower portion of the daylight 26, and the lower portion of the protrusion 28 faces the front surface 22A of the upper portion 20A of the absorber 20 in the vehicle front-rear direction. ing. Furthermore, the daylight 26 and the headlamp 34 have a separate structure, and the daylight 26 is configured to be able to stroke rearward of the vehicle separately from the headlamp 34 in the event of a collision.

  In such a front bumper 12, as shown in FIG. 3, when the front bumper corner of the vehicle 10 (near the daylight 26) collides with a collision object such as a pedestrian's leg, the front of the vehicle 10 The vicinity of the bumper cover 32 of the part is deformed, and the daylight 26 moves to the rear of the vehicle. At this time, the collision body presses the lower portion 20B of the absorber 20 via the bumper cover 32, so that the lower portion 20B of the absorber 20 absorbs the collision energy and the amount of the collision body entering the front portion of the vehicle 10 increases. To do. Further, the protrusion 28 provided integrally with the lower part of the daylight 26 moves to the rear of the vehicle as the daylight 26 moves, and is a pressure tube provided on the rear side of the upper part 20 </ b> A of the absorber 20. 18 is pressed. In other words, the protrusion 28 moves rearward along with the movement of the daylight 26, so that the upper portion 20A of the absorber 20 is crushed between the bumper reinforcement 14 and the pressure tube 18 is deformed. When the pressure sensor 40 outputs a signal due to the deformation of the pressure tube 18, the ECU 42 determines whether or not the collision object is a pedestrian. When the ECU 42 determines that the collision body is a pedestrian, a pedestrian active system (not shown) such as a pop-up hood or a pedestrian protection airbag is activated.

  Such a front bumper 12 can detect a collision with a collision object even when the vicinity of the daylight 26 of the vehicle 10 collides with a light collision object such as a pedestrian's leg. Further, since the daylight 26 moves to the rear of the vehicle at the time of the collision, when the vicinity of the daylight 26 of the vehicle 10 collides with the pedestrian's leg, the lower part 20B of the absorber 20 can absorb the impact and walk A person's leg protection performance can also be secured.

  Further, in the front bumper 12, the absorber 20 includes an upper portion 20 </ b> A that is cut on the upper side in the vehicle vertical direction in front of the vehicle front-rear direction, and a pressure tube 18 is disposed on the rear side of the upper portion 20 </ b> A of the absorber 20. Thereby, the protrusion 28 presses the pressure tube 18 through the upper portion 20A of the absorber 20 at the time of collision. When the bumper corner portion of the front bumper 12 collides with a pedestrian, the pedestrian falls into the hood side of the vehicle 10. At this time, since the pressure tube 18 is disposed on the rear side of the upper portion 20A of the absorber 20, the upper portion 20A of the absorber 20 can be crushed and deformed at a high position in the vehicle vertical direction. For this reason, the collision detection performance of the pedestrian who falls to the hood side at the bumper corner portion can be further improved.

  Further, the lower part 20B of the absorber 20 protrudes further toward the front side of the vehicle than the upper part 20A, and the rear side is weaker than the front side by a concave groove 22D provided in the rear surface part 22C. Thereby, collision energy can be absorbed by the lower part 20B of the absorber 20, and the leg part protection performance of a pedestrian can be improved.

  Furthermore, since the front surface 22B of the lower part 20B of the absorber 20 is disposed on the vehicle front side with respect to the front end portion 26A of the daylight 26 in the vehicle side cross-sectional view, the pedestrian's leg portion is used for the vehicle headlight at the time of collision. Before hitting the lamp, the lower part 20B of the absorber 20 is pressed through the bumper cover 32 or the like. For this reason, a leg part's leg protection performance can be improved more reliably.

  Furthermore, in the front bumper 12, a protrusion 28 is integrally provided at the lower part of the daylight 26, and the daylight 26 is a headlamp disposed obliquely above the vehicle behind the daylight 26. 34 is a separate structure. At that time, a stroke in the vehicle front-rear direction that is greater than the stroke required for detection by the pedestrian collision detection sensor is set between the daylight 26 and the headlamp 34. For this reason, the daytime lamp 26 moves to the rear of the vehicle without contacting the headlamp 34 at the time of collision with the collision body, and the pressure tube 18 is more reliably pressed by the protrusion 28 via the upper portion 20A of the absorber 20. Can do.

  In the above-described embodiment, the protrusion 28 is provided on the daylight 26 arranged on the vehicle upper side of the vehicle width direction outer side end portion of the pressure tube 18 at the bumper corner portion. is not. For example, instead of the daylight 26, a headlamp as a vehicle headlamp may be provided, and a protrusion for pressing the pressure tube 18 at the time of a collision may be provided below the headlamp.

  Moreover, in the said embodiment, although the front surface 22B of the lower part 20B of the absorber 20 is arrange | positioned rather than the front end part 26A of the daylight 26 in the vehicle side sectional view, it is not limited to this. Absent. For example, the front surface of the lower portion 20 </ b> B of the absorber 20 may be disposed at substantially the same position as the front end portion 26 </ b> A of the daylight 26 in the vehicle side sectional view. Thereby, the lower part 20 </ b> B of the absorber 20 can be pressed via the bumper cover 32 almost simultaneously with a collision object such as a leg part of the pedestrian hitting the front end part 26 </ b> A of the daylight 26 at the time of the collision.

  Moreover, in the said embodiment, although the projection part 28 is made into the substantially rectangular shape by the vehicle side sectional view, it is not limited to this. The shape and position of the protrusion are not limited to the above embodiment, and can be changed as long as the protrusion can move toward the rear of the vehicle and press the pressure tube 18 in the event of a collision.

  Moreover, in the said embodiment, although the headlamp 34 is arrange | positioned in the diagonally upper side behind the vehicle of the daylight 26, it is not limited to this. The headlamp 34 only needs to be disposed on the vehicle rear side of the front end portion 26A of the daylight 26, and the shape and position of the daylight and the headlamp can be changed.

  Moreover, in the said embodiment, although the ditch | groove 22D is formed in the rear part side of the lower part 20B of the absorber 20, it is not limited to this. For example, by changing the foaming ratio of the absorber 20 and making the hardness of the rear portion side of the lower portion 20B of the absorber 20 softer than the hardness of the front portion side, the rear portion side of the lower portion 20B of the absorber 20 is changed from the front portion side. Alternatively, the configuration may be weakened.

  Furthermore, in the said embodiment, although the pressure tube 18 is provided as a pedestrian collision detection sensor, it is not limited to a pressure tube. For example, as the pedestrian collision detection sensor, another pressure type sensor such as a chamber type or an optical fiber type whose output changes when pressed (can be sensed by pressing) may be used.

10 Vehicle 14 Bumper reinforcement 14A Front 18 Pressure tube (pedestrian collision detection sensor)
20 Absorber 20A Upper part 20B Lower part 22B Front face 22D Concave groove (weakened structure)
26 Daylight (vehicle headlamp)
26A Front end portion 28 Protruding portion 34 Head lamp 40 Pressure sensor (pedestrian collision detection sensor)
S1 Bumper structure for vehicles

Claims (4)

A pedestrian collision detection sensor that is arranged along the vehicle width direction on the front side of the vehicle longitudinal direction of the bumper reinforcement extending along the vehicle width direction, and whose output changes when pressed.
An absorber disposed on the vehicle front side of the bumper reinforcement, and disposed with the pedestrian collision detection sensor interposed between the bumper reinforcement and the bumper reinforcement;
Provided at both ends in the vehicle width direction of the front portion of the vehicle, and disposed on the vehicle upper side with respect to the pedestrian collision detection sensor. Is also arranged on the front side of the vehicle, and is configured to be able to stroke to the rear of the vehicle in the event of a collision,
A protrusion provided integrally with a lower part of the vehicle headlamp in the vertical direction of the vehicle, and pressing the pedestrian collision detection sensor as the vehicle headlamp moves rearward of the vehicle at the time of a collision;
A bumper structure for vehicles. The absorber is attached to the front side of the bumper reinforcement in the vehicle front-rear direction, and the upper part of the vehicle up-down direction upper side in front of the vehicle front-rear direction and the rear side of the vehicle front-rear direction are weaker than the front side. And a lower portion,
The vehicle bumper structure according to claim 1, wherein the pedestrian collision detection sensor is disposed on the upper portion.   A vehicle front-rear direction front surface of the lower part of the absorber in a vehicle side cross-sectional view is closer to the vehicle front side than the front end portion of the vehicle headlamp in the vehicle front-rear direction or in the vehicle front-rear direction of the vehicle headlamp The vehicle bumper structure according to claim 2, wherein the vehicle bumper structure is located at the same position as the front end of the vehicle. The vehicle headlamp is a daylight,
The headlamps arranged on the vehicle rear side of the front-and-rear direction of the vehicle front-rear direction of the daylight and the daylight are separate structures,
The vehicle longitudinal direction stroke more than the stroke required for the detection of the said pedestrian collision detection sensor is set between the said daylight and the said headlamp. The vehicle bumper structure described.

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