Pedestrian Collision Detection Device

Abstract

To detect a collision with a pedestrian precisely.SOLUTION: In a pedestrian collision detection device 10, an upper rib 32 and a lower rib 34 extend intermittently in a lateral direction on a front surface 30C of an absorber 30 and a pressure tube 42 is provided between the upper rib 32 and the lower rib 34. The support plate 51 covers the front surface of the absorber 30 from the front side with the upper rib 32 and the lower rib 34 inserted through insertion holes 51A of the support plate 51 in a support cover 50. Further, the support plate 51 supports the pressure tube 42 from the rear side, and a rear flange 54 and a rear flange 55 forming a rear end of the support cover 50 are disposed adjacent to the front side of the bumper beam 20. Thus, the structure allows a reaction force from the support plate 51 to the pressure tube 42 to act effectively during a frontal collision between a pedestrian and a vehicle V.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a pedestrian collision detection device. [Background technology]

[0002] A pedestrian collision detection device is provided at the front end of a vehicle and is configured to detect a collision of a pedestrian with the vehicle. In the pedestrian collision detection device, for example, a foam material (absorber) is disposed adjacent to the front side of a bumper support member (bumper beam), and a detection tube (pressure tube) is inserted into a groove formed in the front surface of the foam material (see Patent Document 1 below). In the event of a frontal collision between a pedestrian and a vehicle, the bumper cover inputs a collision load toward the rear of the vehicle into the detection tube, causing the bumper cover and the foam material to compress (crush) the detection tube in the fore-and-aft direction. This changes the pressure inside the detection tube, and the pedestrian collision detection device detects a collision between the pedestrian and the vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-519375710 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-described pedestrian collision detection device leaves room for improvement in the following respects. Specifically, in the above-described pedestrian collision detection device, a collision load toward the rear of the vehicle is input to the front end of the foam material and the detection tube by the bumper cover. At this time, the foam material is deformed by the collision load, displacing the front end of the foam material rearward. This reduces the reaction force acting from the foam material to the detection tube, thereby reducing the amount of deformation of the detection tube. Therefore, the above-described pedestrian collision detection device leaves room for improvement in terms of effectively deforming the detection tube during a collision between a pedestrian and a vehicle and detecting a collision with a pedestrian.

[0005] SUMMARY OF THE INVENTION In consideration of the above, an object of the present invention is to provide a pedestrian collision detection device that can effectively detect a collision with a pedestrian. [Means for solving the problem]

[0006] One or more embodiments of the present invention are a pedestrian collision detection device comprising: a bumper beam extending in a vehicle width direction; an absorber disposed adjacent to the front side of the bumper beam and extending in the vehicle width direction; an upper rib protruding from a front surface of the absorber toward the front side of the vehicle and extending intermittently in the vehicle width direction; a lower rib protruding from a front surface of the absorber below the upper rib toward the front side of the vehicle and extending intermittently in the vehicle width direction; a collision detection sensor comprising: a pressure tube extending in the vehicle width direction and disposed between the upper rib and the lower rib, the collision detection sensor outputting a signal corresponding to a pressure change in the pressure tube; and a cover disposed adjacent to the front side of the bumper beam, the cover covering the front surface of the absorber from the front side of the vehicle and including a support portion having insertion holes through which the upper rib and the lower rib are inserted, the support portion supporting the pressure tube from the rear side of the vehicle. [Effects of the Invention]

[0007] One or more embodiments of the present invention provide for better detection of collisions with pedestrians. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic plan view showing a pedestrian collision detection device according to an embodiment of the present invention; [Figure 2] 2 is a cross-sectional view (enlarged cross-sectional view taken along line 2-2 in FIG. 1) of the pedestrian collision detection device shown in FIG. 1 as seen from the left side. [Figure 3] 3 is a partially cutaway perspective view showing a state in which the support cover shown in FIG. 2 is assembled to the absorber. FIG. [Figure 4] 4 is a cross-sectional view corresponding to FIG. 3, illustrating a schematic operation of the pedestrian collision detection device in the event of a frontal collision between a vehicle and a pedestrian. [Figure 5] 4 is a cross-sectional view corresponding to FIG. 3, schematically illustrating the operation of the pedestrian collision detection device when a vehicle collides head-on with a collision object other than a pedestrian. FIG. [Figure 6] 4 is a perspective view corresponding to FIG. 3, showing a modified example of the upper rib of the absorber shown in FIG. 3. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] The pedestrian collision detection device 10 according to this embodiment will be described below with reference to the drawings. Note that the arrow FR shown as appropriate in the drawings indicates the front side of a vehicle (automobile) V to which the pedestrian collision detection device 10 is applied, the arrow UP indicates the upper side of the vehicle, and the arrow LH indicates the left side of the vehicle (one side in the vehicle width direction). In the following description, when up-down, front-rear, and left-right directions are used, they refer to the up-down direction of the vehicle, the front-rear direction of the vehicle, and the left-right direction of the vehicle unless otherwise specified.

[0010] As shown in Figures 1 and 2, the pedestrian collision detection device 10 is disposed at the front end of a vehicle V and is configured as a device for detecting a collision of a collision object with the vehicle V. The pedestrian collision detection device 10 includes a bumper beam 20 that constitutes a framework member of the vehicle V, an absorber 30 disposed in front of the bumper beam 20, and a support cover 50 attached to the absorber 30. The pedestrian collision detection device 10 also has a collision detection sensor 40. Each component of the pedestrian collision detection device 10 will be described below.

[0011] (About Bumper Beam 20) The bumper beam 20 extends in the left-right direction (vehicle width direction) and is formed into a substantially rectangular closed cross-sectional shape when viewed in a cross section from the longitudinal direction of the bumper beam 20. The bumper beam 20 includes a front panel 22 that forms the front end of the bumper beam 20, and a rear panel 24 that forms the rear of the bumper beam 20.

[0012] The front panel 22 is made of a metal plate, has a thickness in the front-rear direction, and extends in the left-right direction. A recess 22A that is recessed one step toward the rear is formed in the middle of the front panel 22 in the up-down direction. The portion of the front panel 22 above the recess 22A is configured as an upper flange portion 22B, and the portion of the front panel 22 below the recess 22A is configured as a lower flange portion 22C.

[0013] The rear panel 24 is made of a metal plate similar to the front panel 22 and extends in the left-right direction. When viewed in the longitudinal direction, the rear panel 24 is formed in a generally hat shape that is open to the front. The upper end of the rear panel 24 is joined to the upper flange portion 22B of the front panel 22, and the lower end of the rear panel 24 is joined to the lower flange portion 22C of the front panel 22.

[0014] A pair of left and right front side frames 60 that form the framework of the vehicle V are provided on the rear side of the bumper beam 20, and the front side frames 60 extend in the front-to-rear direction. Both ends of the bumper beam 20 in the vehicle width direction are connected to the front ends of the front side frames 60 via crash boxes 62.

[0015] (About Absorber 30) The absorber 30 is made of a foamed resin material, such as urethane foam. The absorber 30 is formed in a generally elongated shape with its longitudinal direction extending in the left-right direction, and is disposed adjacent to the front side of the recessed portion 22A of the bumper beam 20. The absorber 30 is formed in a generally trapezoidal shape in a cross section viewed from the longitudinal direction. Specifically, the upper surface 30A of the absorber 30 is slightly inclined upward toward the rear when viewed from the left-right direction, and the lower surface 30B of the absorber 30 is slightly inclined downward toward the rear when viewed from the left-right direction. The rear surface of the absorber 30 is fixed to the front surface of the recessed portion 22A of the bumper beam 20.

[0016] As shown in Fig. 3, an upper rib 32 is integrally provided on the upper end of the front surface 30C of the absorber 30. The upper rib 32 is formed in a rib shape with its thickness direction in the up-down direction and extending in the left-right direction, and extends intermittently in the left-right direction. That is, the upper rib 32 is composed of a plurality of upper rib portions 32A. The plurality of upper rib portions 32A are formed in the shape of a substantially rectangular parallelepiped block with its longitudinal direction in the left-right direction, and are arranged side by side at a predetermined interval in the left-right direction.

[0017] A lower rib 34 is integrally provided below the upper rib 32 at the lower end of the front surface 30C of the absorber 30. Like the upper rib 32, the lower rib 34 is formed in a rib shape with its thickness direction in the up-down direction and extending in the left-right direction, and extends intermittently in the left-right direction. That is, the lower rib 34 is made up of a plurality of lower rib portions 34A, which are formed in the shape of approximately rectangular parallelepiped blocks extending in the left-right direction and are arranged side by side at predetermined intervals in the left-right direction.

[0018] The thickness dimension (vertical dimension), left-right dimension, and front-rear dimension of the upper rib portion 32A and the lower rib portion 34A are set to be the same. That is, in this embodiment, the shapes of the upper rib portion 32A and the lower rib portion 34A are the same, and the rigidity of the upper rib portion 32A and the lower rib portion 34A is set to be the same. Furthermore, the left-right positions of the upper rib portion 32A and the lower rib portion 34A are set to be the same. That is, the upper rib portion 32A and the lower rib portion 34A are arranged opposite each other with a predetermined gap in the vertical direction, and the region (space) between the upper rib portion 32A and the lower rib portion 34A in the absorber 30 is configured as a tube accommodating portion 30D for accommodating a pressure tube 42, which will be described later.

[0019] A bumper cover 64 is provided in front of the absorber 30. The bumper cover 64 forms the front end of the vehicle V, extends in the vehicle width direction, and is fixed to the vehicle body at a predetermined position (not shown). As a result, the bumper cover 64 covers the front side of the absorber 30.

[0020] (Regarding the collision detection sensor 40) The collision detection sensor 40 includes a pressure tube 42 and a pressure sensor 44 (in a broad sense, an element that can be understood as a pressure detector) that outputs a signal in response to a change in pressure in the pressure tube 42.

[0021] The pressure tube 42 is formed in an elongated shape with its longitudinal direction in the left-right direction and is configured as a hollow structure with a substantially circular cross section. The pressure tube 42 is housed in the tube housing portion 30D of the absorber 30. Specifically, the pressure tube 42 is disposed adjacent to the upper side of the lower rib 34 and spaced apart below the upper rib 32. That is, the diameter of the pressure tube 42 is set smaller than the dimension of the tube housing portion 30D in the up-down direction, and a gap G is formed between the upper rib 32 and the pressure tube 42. The dimension of the gap G in the up-down direction is set to a predetermined dimension and is set to suppress deformation of the pressure tube 42 in the event of a collision between the vehicle V and an impact object other than a pedestrian, as described below.

[0022] The pressure sensors 44 are provided at both longitudinal ends of the pressure tube 42 and are fixed to the vehicle body at positions not shown. The pressure sensors 44 are electrically connected to the ECU 46 (which is broadly understood as a collision determination unit). When the pressure tube 42 deforms, a signal corresponding to the pressure change inside the pressure tube 42 is output from the pressure sensor 44 to the ECU 46.

[0023] Furthermore, the ECU 46 calculates a pressure change value in the pressure tube 42 based on the output signal of the pressure sensor 44, and determines whether the pressure change value exceeds a threshold value to determine whether the object that struck the bumper cover 64 is a pedestrian or an object other than a pedestrian, such as a small animal. In more detail, if the pressure change value in the pressure tube 42 is equal to or greater than the threshold value, the ECU 46 determines that the object that struck is a pedestrian, and if the pressure change value in the pressure tube 42 is smaller than the threshold value, the ECU 46 determines that the object that struck is other than a pedestrian.

[0024] (Regarding the support cover 50) The support cover 50 is disposed adjacent to the front side of the bumper beam 20 so as to cover the absorber 30 from the front side. The support cover 50 extends in the left-right direction and is formed in a generally hat shape that is open to the rear when viewed in its longitudinal direction. Specifically, the support cover 50 includes a support plate 51 as a support portion whose plate thickness direction is the front-to-rear direction, an upper wall 52 extending rearward from the upper end of the support plate 51, a lower wall 53 extending rearward from the lower end of the support plate 51, a rear flange 54 extending upward from the rear end of the upper wall 52 and constituting the rear end of the support cover 50, and a rear flange 55 extending downward from the rear end of the lower wall 53 and constituting the rear end of the support cover 50.

[0025] The upper wall 52 is slightly inclined upward as it extends rearward along the upper surface 30A of the absorber 30, and is disposed adjacent to the upper side of the upper surface 30A. The lower wall 53 is slightly inclined downward as it extends rearward along the lower surface 30B of the absorber 30, and is disposed adjacent to the lower side of the lower surface 30B. The rear flange 54 is disposed adjacent to the front side of the bumper beam 20 and is disposed adjacent to the lower side of the upper flange portion 22B of the bumper beam 20. The rear flange 55 is disposed adjacent to the front side of the bumper beam 20 and is disposed adjacent to the upper side of the lower flange portion 22C of the bumper beam 20. In other words, the rear end of the support cover 50 is disposed so as to be sandwiched from the outside in the vertical direction by the recess 22A of the bumper beam 20. As a result, rearward movement of the support cover 50 is limited by the bumper beam 20, and vertical displacement of the rear end of the support cover 50 is limited by the recess 22A. The support cover 50 is not fixed to the absorber 30, and the absorber 30 is displaced relative to the support cover 50 when the absorber 30 is compressed and deformed in the front-rear direction, for example.

[0026] A plurality of insertion holes 51A are formed through the support plate 51 at positions corresponding to the upper rib portions 32A and the lower rib portions 34A. The insertion holes 51A are formed as approximately rectangular elongated holes with their longitudinal direction extending in the left-right direction, corresponding to the upper rib portions 32A and the lower rib portions 34A. The upper rib portions 32A and the lower rib portions 34A are inserted through the insertion holes 51A, and the support plate 51 is disposed adjacent to the front side of the front surface 30C of the absorber 30. The pressure tube 42 is disposed adjacent to the front side of the support plate 51, and the diameter of the pressure tube 42 is set so that it does not protrude forward beyond the upper ribs 32 and the lower ribs 34. In other words, the support plate 51 is configured to function as a support portion that supports the pressure tube 42 from the rear side.

[0027] Furthermore, the support cover 50 is made of a hard synthetic resin material and has a predetermined rigidity in the front-to-rear direction. Specifically, in the event of a collision between the pedestrian and the vehicle V, the support cover 50 is not plastically deformed, and the support cover 50 (support plate 51) is configured to ensure the support performance for the pressure tube 42.

[0028] (Action and effect) Next, the operation of the pedestrian collision detection device 10 in the event of a frontal collision between a pedestrian and the vehicle V will be described, along with the functions and effects of this embodiment.

[0029] 4, in a frontal collision of vehicle V with a pedestrian, the pedestrian's legs hit the bumper cover 64, and a rearward collision load F1 is input to the bumper cover 64, displacing the bumper cover 64 rearward. As a result, the bumper cover 64 presses against the front end portion of the absorber 30 (i.e., the upper rib 32 and the lower rib 34). As a result, the absorber 30 is compressed and deformed in the front-to-rear direction so that the front end portion of the absorber 30, including the upper rib 32 and the lower rib 34, is displaced rearward.

[0030] On the other hand, the rear flanges 54 and 55 of the support cover 50 are disposed adjacent to the front side of the bumper beam 20, and rearward movement of the support cover 50 is restricted by the bumper beam 20. In addition, the support cover 50 is not fixed to the absorber 30. For this reason, the absorber 30 is deformed such that the upper rib 32 and the lower rib 34 are displaced rearward relative to the support plate 51 of the support cover 50. At this time, the bumper cover 64 presses the pressure tube 42 while the support plate 51 maintains its support function for the pressure tube 42. As a result, the pressure tube 42 is sandwiched between the bumper cover 64 and the support cover 50 in the front-rear direction and is compressed and deformed.

[0031] Furthermore, when the absorber 30 undergoes compressive deformation in the front-rear direction, the absorber 30 deforms so as to bulge outward in the up-down direction (see arrow A in FIG. 4 ), causing the upper rib 32 and the lower rib 34 of the absorber 30 to displace inward in the up-down direction (see arrow B in FIG. 4 ). That is, the lower rib 34 displaces upward together with the pressure tube 42, and the upper rib 32 displaces downward. In other words, the upper rib 32 and the lower rib 34 approach each other, sandwiching the pressure tube 42 from both sides in the up-down direction. This causes the pressure tube 42 to undergo compressive deformation in the up-down direction. As a result, in a collision between a pedestrian and the vehicle V, the pressure tube 42 undergoes compressive deformation in the front-rear direction and in the up-down direction. Therefore, the amount of deformation of the pressure tube 42 during a collision between the pedestrian and the vehicle V can be increased, and the pressure change within the pressure tube 42 can be increased. As a result, the ECU 46 detects that the object colliding with the bumper cover 64 is a pedestrian.

[0032] In a frontal collision between the vehicle V and an object other than a pedestrian, such as a small animal, the object strikes the lower part of the bumper cover 64. Therefore, as shown in FIG. 5 , a collision load F2 acting mainly in the upward and rearward direction is input to the bumper cover 64 and the front end (lower rib 34) of the absorber 30. When the collision load F2 is input to the lower rib 34 of the absorber 30, the lower rib 34 is displaced in the upward and rearward direction while being crushed. As a result, the displacement of the lower rib 34 causes the pressure tube 42 to move upward within the tube accommodating portion 30D. However, because a gap G is formed between the pressure tube 42 and the upper rib 32, the gap G absorbs the upward displacement of the pressure tube 42. Therefore, vertical compressive deformation of the pressure tube 42 by the upper rib 32 and the lower rib 34 is suppressed. Therefore, it is possible to reduce the amount of deformation of the pressure tube 42 when the vehicle V collides with an object other than a pedestrian, and also to reduce the pressure change inside the pressure tube 42. As a result, the ECU 46 detects that the object that has collided with the bumper cover 64 is a small animal or the like other than a pedestrian.

[0033] As described above, in the pedestrian collision detection device 10 of this embodiment, the upper ribs 32 and the lower ribs 34 extend intermittently in the left-right direction on the front surface 30C of the absorber 30, and the pressure tube 42 is provided between the upper ribs 32 and the lower ribs 34. Here, the upper ribs 32 and the lower ribs 34 are inserted into the insertion holes 51A of the support plate 51 of the support cover 50, and the support plate 51 covers the front surface of the absorber 30 from the front side. In addition, the support plate 51 supports the pressure tube 42 from the rear side, and the rear flanges 54 and 55 that form the rear end of the support cover 50 are disposed adjacent to the front side of the bumper beam 20. Therefore, as described above, in the event of a frontal collision between a pedestrian and vehicle V, even if a rearward collision load F1 is input to the upper rib 32 and the lower rib 34 of the absorber 30 and the front end of the absorber 30 is displaced rearward due to compressive deformation of the absorber 30, the rearward movement of the support cover 50 (support plate 51) can be limited by the bumper beam 20. In other words, the support function of the support plate 51 for the pressure tube 42 can be maintained. This allows the reaction force from the support plate 51 to act effectively on the pressure tube 42. As a result, the bumper cover 64 and the support plate 51 can effectively compressively deform the pressure tube 42 in the fore-and-aft direction, increasing the amount of deformation of the pressure tube 42. Therefore, a collision with a pedestrian can be effectively detected.

[0034] The upper wall 52 of the support cover 50 extends rearward from the upper end of the support plate 51 and is disposed adjacent to the upper side of the absorber 30. The lower wall 53 of the support cover 50 extends rearward from the lower end of the support plate 51 and is disposed adjacent to the lower side of the absorber 30. Therefore, as described above, when a rearward collision load F1 is input to the front end of the absorber 30 and the absorber 30 expands outward in the vertical direction, the front end of the absorber 30 presses the upper wall 52 and the lower wall 53 of the support cover 50 outward in the vertical direction. This causes a tensile force f (see FIG. 4 ) to act outward in the vertical direction on the support plate 51 of the support cover 50. As a result, in the event of a frontal collision between a pedestrian and the vehicle V, the reaction force acting forward from the support plate 51 on the pressure tube 42 can be more effectively applied. This allows the pressure tube 42 to be more effectively compressed and deformed in the longitudinal direction.

[0035] As described above, the upper wall 52 of the support cover 50 is disposed adjacent to the upper side of the absorber 30, and the lower wall 53 of the support cover 50 is disposed adjacent to the lower side of the absorber 30. This makes it possible to maintain a good assembled state of the support cover 50 after the support cover 50 is assembled to the absorber 30 in an unfixed state.

[0036] Furthermore, the rear flange 54 of the support cover 50 is disposed adjacent to the front side of the upper end of the recessed portion 22A in the bumper beam 20, and the rear flange 55 of the support cover 50 is disposed adjacent to the front side of the lower end of the recessed portion 22A in the bumper beam 20. Therefore, the recessed portion 22A of the bumper beam 20 can prevent the rear end of the support cover 50 from opening outward in the vertical direction. As a result, in the event of a frontal collision between the pedestrian and the vehicle V, the bumper beam 20 can effectively support the support cover 50 while preventing the support plate 51 from displacing rearward. As a result, the support performance of the support plate 51 for the pressure tube 42 can be maintained effectively.

[0037] In this embodiment, the shapes of the upper ribs 32 and the lower ribs 34 of the absorber 30 are set so that the bending rigidity of the upper rib 32 and the lower rib 34 is the same. Alternatively, the bending rigidity of the upper rib 32 may be lower than the bending rigidity of the lower rib 34. For example, although not shown, the left-right or up-down dimension of the upper rib 32 may be set shorter than the left-right or up-down dimension of the lower rib 34, thereby lowering the bending rigidity of the upper rib 32 than the bending rigidity of the lower rib 34. Also, as shown in FIG. 6, a slit 32B extending in the up-down or left-right direction may be formed in the upper rib portion 32A of the upper rib 32, thereby lowering the bending rigidity of the upper rib 32 than the bending rigidity of the lower rib 34 (FIG. 6 shows an example in which the slit 32B extending in the up-down direction is formed in the upper rib portion 32A). This further increases the deformation amount of the pressure tube 42 during a collision between a pedestrian and a vehicle V.

[0038] That is, as described above, in a frontal collision of vehicle V with a pedestrian, the pedestrian's legs strike the bumper cover 64, displacing the bumper cover 64 rearward, and the rearward collision load F1 is input from the bumper cover 64 to the front end of the absorber 30 (i.e., the upper rib 32 and the lower rib 34). After the pedestrian's legs strike the bumper cover 64, the pedestrian falls onto the hood of vehicle V. Therefore, the direction of the collision load F1 shifts to a diagonally downward rearward direction, and the diagonally downward rearward collision load F1 is mainly input to the upper rib 32. In the example shown in FIG. 6 , the bending rigidity of the upper rib 32 is set lower than that of the lower rib 34, so that the upper rib 32 can be easily displaced diagonally downward rearward by the diagonally downward rearward collision load F1. This allows the upper rib 32 and the lower rib 34 to effectively crush the pressure tube 42 in the vertical direction. Therefore, the amount of deformation of the pressure tube 42 in the event of a collision between the pedestrian and the vehicle V can be further increased.

[0039] In addition, in this embodiment, the rear flanges 54 and 55 of the support cover 50 are disposed within the recessed portion 22A of the bumper beam 20, and the recessed portion 22A restricts the outward displacement of the rear flanges 54 and 55 in the vertical direction. Alternatively, the rear flanges 54 and 55 of the support cover 50 may be fixed to the bumper beam 20 using, for example, fasteners or the like. In this case, the recessed portion 22A in the bumper beam 20 may be omitted.

[0040] Furthermore, in this embodiment, the pressure tube 42 is disposed adjacent to the upper side of the rear flange 55, but the pressure tube 42 may be configured to be disposed in the vertical center of the tube accommodating portion 30D. For example, a plurality of ribs may be formed on the upper surface of the lower rib portion 34A, and the pressure tube 42 may be configured to be disposed in the vertical center of the tube accommodating portion 30D.

[0041] In addition, a protrusion 34B (see Figure 2) that protrudes upward may be formed at the front end of the lower rib portion 34A of the absorber 30 of this embodiment, and the protrusion 34B may limit the forward movement of the pressure tube 42. [Explanation of symbols]

[0042] 10 Pedestrian collision detection device 20 Bumper beam 30 Absorber 32 Upper rib 34 Lower rib 40 Collision detection sensor 42 Pressure Tube 50 Support cover (cover) 51 Support plate (support part) 51A Insertion hole

Claims

1. a bumper beam extending in the vehicle width direction; an absorber disposed adjacent to the front side of the bumper beam and extending in the vehicle width direction; an upper rib that protrudes from a front surface of the absorber toward the front side of the vehicle and extends intermittently in the vehicle width direction; a lower rib that protrudes from a front surface of the absorber toward the front side of the vehicle below the upper rib and extends intermittently in the vehicle width direction; a collision detection sensor including a pressure tube extending in a vehicle width direction and disposed between the upper rib and the lower rib, the collision detection sensor outputting a signal corresponding to a change in pressure of the pressure tube; a cover that covers a front surface of the absorber from a front side of the vehicle and includes a support portion having insertion holes through which the upper rib and the lower rib are inserted, the cover being disposed adjacent to the front side of the bumper beam; Equipped with The support portion supports the pressure tube from the rear side of the vehicle.

2. The cover is an upper wall extending from an upper end of the support portion toward the vehicle rear side and disposed adjacent to an upper side of the absorber; a lower wall extending from a lower end of the support portion toward the vehicle rear side and disposed adjacent to a vehicle lower side of the absorber; The pedestrian collision detection device according to claim 1, further comprising:

3. 3. The pedestrian collision detection device according to claim 1, wherein the rigidity of the upper rib is lower than the rigidity of the lower rib.

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