JP6725892B2 - Vehicle bumper unit - Google Patents

Description

The present invention relates to a bumper unit of a vehicle, and more particularly to a technique for reducing deformation of the bumper due to thermal expansion.

Headlamps are provided in a pair at the front of the vehicle with a radiator in between. The headlamp is a lamp whose purpose is to improve the visibility of the driver by illuminating the front of the vehicle when the vehicle is traveling in a dark place such as at night.
Recently, in order to improve the design of the front part of the vehicle, there is a design in which the periphery of the headlamp is covered with a bumper. In the case of such a vehicle, an opening is provided in the bumper in accordance with the position of the headlamp, and the headlamp is fitted so that the headlamp is exposed from the opening (Patent Document 1).

Japanese Patent Laid-Open No. 10-297356

By the way, since the bumper is made of a resin component, it is easily affected by outside air temperature and solar radiation, and when the temperature of the bumper surface becomes high, the bumper itself expands and deforms. Therefore, as disclosed in Patent Document 1, in the case of a configuration in which the periphery of the headlamp is covered with a bumper, when the bumper expands due to the influence of the outside temperature or the like, the headlamp causes the left and right sides of the vehicle at the opening portion of the bumper to expand. Since the displacement in the direction (width direction) is restricted, the center portion (center in the left-right direction) between the left and right openings (headlamps) of the bumper may be distorted so as to bulge in the vehicle traveling direction (front-rear direction). There is. If the central part of the bumper is distorted, it will have a great impact on the appearance and there is room for improvement.

The present invention has been made in view of the above problems, and an object thereof is to suppress distortion due to thermal expansion of a portion between the lamps in a vehicle in which the lamps are surrounded by a bumper and have a good appearance. It is to provide a bumper unit for a vehicle that can be improved.

In order to achieve the above object, the bumper unit of the present invention has a bumper arranged at the front or rear of the vehicle and a pair of lamps formed on the bumper and mounted on the left and right of the vehicle, respectively. A pair of lamp holes that are fitted together as described above, and a deformation absorbing portion that is provided at an intermediate portion sandwiched between the pair of lamp holes of the bumper and that is formed of a plurality of openings, and that covers the deformation absorbing portion. And a cover attached to the bumper so as to hide it.

As a result, when the bumper expands and deforms due to the influence of heat, the deformation absorbing portion can absorb the displacement in the vehicle left-right direction of the intermediate portion between the lamps covered by the cover, so that the displacement between the headlamps of the bumper can be reduced. It is possible to prevent the deformation due to the thermal expansion of the intermediate portion from being distorted in the vertical direction and the vehicle traveling direction. Further, the opening between the lamps of the bumper can cover the deformation of the opening by the cover, so that it is possible to prevent the appearance from being deteriorated due to the deformation due to the thermal expansion.

As another aspect, the cover has an assembling portion at an upper end and a lower end thereof for assembling the cover at an intermediate portion of the bumper, and at the intermediate portion, a portion above or below the deformation absorbing portion. It is preferable that the assembling portion has a hole to be assembled.
As a result, the assembling parts of the cover are assembled at the upper and lower portions of the deformation absorbing part, so that the assembling part does not hinder the absorption of the deformation of the intermediate part due to the opening of the deformation absorbing part, and the rigidity is reduced by the opening. The top and bottom of the deformation absorbing portion can be supported by the cover. Further, the deformation of the intermediate portion due to the thermal expansion in the vertical direction can be restricted by the assembly portion of the cover.

As another aspect, it includes an elongated hole-shaped locked hole that is provided at symmetrical positions and is long in the vehicle left-right direction, and the assembling portion can be displaced relative to the locked hole in the vehicle left-right direction. It is preferable to include a locking claw that is locked to.
This allows the relative displacement between the intermediate portion and the cover.

As another aspect, the to-be-assembled hole portion further includes a pilot hole located in the center of the intermediate portion in the vehicle left-right direction, and the assembly portion is located in the center of the cover in the vehicle left-right direction. It is preferable to further include a pilot pin that is fitted to the.
As a result, the relative displacement between the intermediate portion and the cover can be allowed without shifting the position of the center of the cover in the left-right direction from the center of the intermediate portion in the left-right direction due to thermal expansion.

As another aspect, it is preferable that the deformation absorbing section is configured by arranging the plurality of openings in the intermediate portion in a laterally symmetrical manner in the vehicle left-right direction.
Thus, by arranging the plurality of openings in the left-right direction, it is possible to efficiently absorb the deformation in the left-right direction by the deformation absorbing portion while suppressing the decrease in rigidity in the up-down direction at the intermediate portion.
Further, it is possible to deform the intermediate portion evenly in the left and right during thermal expansion.

As another aspect, it is preferable to provide a rib extending along the peripheral edge of the opening, the rib extending perpendicularly to the surface of the intermediate portion of the bumper in which the opening is formed.
Thus, the rib extending perpendicularly to the surface of the intermediate portion of the bumper in which the opening is formed is provided along the peripheral edge of the opening, so that the rigidity of the bumper that is reduced by providing the opening in the intermediate portion of the bumper is reduced, It is possible to guarantee by having the rib.

As another aspect, it is preferable that at least one of the openings has a width dimension in the up-down direction of the vehicle longer than a width dimension in the left-right direction of the vehicle.
As a result, at least one of the openings has a width dimension in the vertical direction of the vehicle longer than the width dimension in the left-right direction of the vehicle, so that the rigidity of the bumper is lowered by providing the opening at an intermediate portion of the bumper. This can be alleviated, and the deformation of the vehicle in the left-right direction can be facilitated as compared with the deformation of the opening in the up-down direction of the vehicle.

As another aspect, it is preferable that at least one of the openings has a recess in which a part or the whole of the left and right edges of the opening is recessed toward the center when viewed in the left-right direction of the vehicle.
As a result, at least one of the openings has a concave portion that is recessed toward the center when viewed in the vehicle left-right direction, so that at least one of the left and right edges of the opening has a recessed portion that is recessed toward the center. It is possible to prevent the bumper from being positively deflected in the left-right direction of the vehicle due to the distortion to, and the bumper from being deformed in the directions other than the left-right direction of the vehicle.

As another aspect, it is preferable that the recess has an arc shape.
As a result, since the concave portion has an arc shape, stress concentration does not occur in the concave portion when the concave portion is positively distorted in the left-right direction of the vehicle due to the strain in the center of the vehicle due to the thermal deformation of the bumper. Is possible.

In another aspect, at least one of the openings is preferably elliptical.
As a result, the peripheral edge forming the opening has an elliptical shape, so that it is possible to avoid providing a location where stress concentration occurs on the peripheral edge forming the opening.

According to the bumper unit of the present invention, when the bumper expands and deforms due to the influence of heat, the deformation absorbing portion can absorb the displacement of the intermediate portion between the lamps covered by the cover in the vehicle left-right direction. It is possible to prevent the deformation due to the thermal expansion of the intermediate portion between the headlamps from being distorted in the vertical direction or the vehicle traveling direction. Further, the opening between the lamps of the bumper can cover the deformation of the opening by the cover, so that the appearance does not deteriorate due to the deformation due to thermal expansion.

As a result, even in a vehicle in which the lamps are surrounded by bumpers, distortion due to thermal expansion of the bumpers between the lamps can be suppressed and the appearance can be improved.

It is a schematic block diagram of a vehicle front part. It is a block diagram of the center part of the bumper unit as viewed in the vehicle left-right direction. It is a detailed view of the surface of the cover facing the vehicle. It is an enlarged view of the part A in FIG. It is a front view of a bumper. It is a front view of the bumper deformed by the heat of the headlamp. It is a front view of a bumper provided with an octagonal hole. It is a front view of a bumper provided with an elliptical hole. It is a front view of a bumper provided with a honeycomb type hole. It is a front view of a bumper provided with a drum-shaped hole and a crescent-shaped hole.

An embodiment of the present invention will be described below with reference to the drawings.
<First Embodiment>
Referring to FIG. 1, a schematic configuration diagram of a front portion of a vehicle 1 of the present embodiment is shown.
In the present embodiment, the left and right headlamps (lamps) 5 and 105 are arranged in the front bumper unit 3 of the vehicle 1. That is, the headlamps 5 and 105 are surrounded by the bumper unit 3.

The bumper unit 3 includes a bumper 10 and a cover 12.
The bumper 10 is made of a flexible material such as polypropylene, and is arranged so as to extend in the left-right direction of the vehicle 1. The positions of the headlamps 5 and 105 are so arranged that the light emitted from the headlamps 5 and 105 can be visually recognized from the outside of the vehicle 1 at both left and right ends of the bumper 10 when viewed in the vehicle 1 left-right direction (vehicle width direction). Lamp holes 10a and 110a are provided corresponding to the above.

The headlamps 5 and 105 are configured to be fitted into the lamp holes 10a and 110a with a predetermined gap in a state where the bumper unit 3 is assembled to the vehicle 1. In addition, around the lamp holes 10 a and 110 a on the back surface side of the bumper 10, first engaging members 30 and 130 that are engaged with the periphery of the headlamps 5 and 105 are provided.
The cover 12 is disposed so as to overlap the front surface of the intermediate portion 10b located between the left and right lamp holes 10a and 110a of the bumper 10. That is, the cover 12 is assembled so as to cover the intermediate portion 10b sandwiched by the pair of left and right lamp holes 10a and 110a of the bumper 10 from the outside of the vehicle 1. The intermediate portion 10b of the bumper 10 is formed so as to be recessed from the surface of the bumper 10 by one step, and the cover 12 is assembled in a state where the cover 12 is fitted so as to fill the recess formed by the intermediate portion 10b.

The headlamps 5 and 105 are lamps that mainly illuminate the front of the vehicle 1 at night, and are arranged so as to sandwich the radiator 7. Further, the headlamps 5, 105 are provided with second engaging members 20, 120 which engage with the first engaging members 30, 130. When the bumper unit 3 is assembled to the vehicle 1, the first engaging members 30, 130 of the bumper 10 engage with the second engaging members 20, 120 of the headlamps 5, 105, so that the lamp holes 10a, 110a. And the headlamps 5 and 105 are fixed so as not to move relative to each other.

That is, the bumper unit 3 is arranged in the front portion of the vehicle 1 so as to cover the head lamps 5 and 105, and the head lamps 5 and 105 are exposed through the lamp holes 10a and 110a. It is fitted to 10a and 110a.
Referring to FIG. 2, there is shown a central configuration diagram of the bumper unit 3 as viewed in the left-right direction of the vehicle 1.

A deformation absorbing portion 15 is provided at a portion of the bumper 10 located at the center in the vehicle left-right direction, that is, at an intermediate portion 10b sandwiched by a pair of left and right lamp holes 10a and 110a covered by the cover 12. A cover retaining hole (assembled hole portion) 16 into which a claw portion (assembly portion) 13 of the cover 12 described later is fitted is provided on the upper and lower portions of the deformation absorbing portion 15 when viewed in the direction of gravity (vertical direction). It is provided. The cover retaining hole 16 is composed of a pilot hole 16a provided in the center when viewed in the left-right direction of the vehicle 1, and a locked hole 16b provided symmetrically at a position outside the pilot hole 16a in the left-right direction. .. The locked hole 16b has, for example, a long hole shape that is long in the left-right direction, and a locking claw 13b described later is configured to be relatively displaceable in the left-right direction of the vehicle 1. The locked hole 16b may be an opening that extends from the left and right ends of the locking claw 13b in the left-right direction when viewed in the vehicle 1 left-right direction.

Like the bumper 10, the cover 12 is made of a flexible material such as polypropylene, and is arranged so as to overlap the front surface of the intermediate portion 10b and cover the deformation absorbing portion 15. That is, the cover 12 is attached to the bumper 10 so as to cover the deformation absorbing portion 15 provided in the intermediate portion 10b sandwiched between the pair of lamp holes 10a and 110a from the outside of the vehicle 1.

Referring to FIG. 3, there is shown a detailed view of the surface of the cover 12 facing the bumper 10, and the claw portions 13 are provided at the upper end and the lower end of the cover 12, respectively. The claw portion 13 includes a pilot pin 13a provided at the center of the intermediate portion 10b when viewed in the vehicle 1 left-right direction, and a locked hole 16b of the intermediate portion 10b located outside the pilot pin 13a in the vehicle 1 left-right direction. And a locking claw 13b having a so-called claw shape.

That is, the cover 12 is positioned at the center of the intermediate portion 10b as viewed in the left-right direction of the vehicle 1 by fitting the pilot pin 13a of the claw portion 13 into the pilot hole 16a of the cover retaining hole 16, and covers the locking claw 13b. It is assembled to the bumper 10 by being locked in the locking hole 16b. Therefore, when the cover 12 is assembled to the bumper 10, the deformation absorbing portion 15 is hidden by the cover 12. Although the net portion 12a is provided in the center of the cover 12 as a design, the shape may be changed or may not be provided as necessary.

Referring to FIG. 5, a front view of the intermediate portion 10b of the bumper 10 is shown.
The deformation absorbing portion 15 is configured by arranging a plurality of openings, in the present embodiment, a plurality of rectangular holes (openings) 15a and trapezoidal holes (openings) 15b in the left-right direction of the vehicle 1 symmetrically. More specifically, rectangular holes 15a are provided at the center and left and right end portions of the deformation absorbing portion 15 when viewed in the left-right direction of the vehicle 1 and have a longer width dimension in the vertical direction when viewed in the gravity direction compared to the width dimension in the left-right direction. A trapezoidal hole 15b is provided so as to be sandwiched between the rectangular holes 15a with the short side (recess) 17b facing the center. That is, by arranging a plurality of rectangular holes 15a and trapezoidal holes 15b in the middle portion 10b of the bumper 10 in the left-right direction of the vehicle 1, a plurality of gaps capable of absorbing the deformation in the left-right direction of the vehicle 1 are provided in the middle portion 10b, and the deformation absorbing portion is provided. Make up fifteen.

Referring to FIG. 4, an enlarged view of a portion A in FIG. 2 is shown, in which a rib 18 is formed on the periphery of the rectangular hole 15a rearward as viewed in the traveling direction of the vehicle 1, that is, a bumper forming the periphery of the rectangular hole 15a. It is provided so as to project so as to extend perpendicularly to the surface of the intermediate portion 10b of the reference numeral 10.
Referring to FIG. 6, there is shown a front view of the bumper 10 in a state of being deformed by heat such as outside air temperature. The rectangular holes 15a and the trapezoidal holes 15b forming the deformation absorbing portion 15 have their respective peripheral edges in the left-right direction of the vehicle 1. It is distorted toward the center when viewed at.

Specifically, when the bumper 10 expands due to the influence of heat such as the outside temperature, the intermediate portion 10b sandwiched between the lamp holes 10a and 110a of the bumper 10 is displaced (expanded) in the left-right direction of the vehicle 1 by the headlamps 5 and 105. (Deformation) is restricted, and the intermediate part 10b is expanded and deformed toward the center side when viewed in the left-right direction of the vehicle 1 (hereinafter, referred to as "thermal deformation of the intermediate part 10b of the bumper 10" for convenience of description). At this time, in the intermediate portion 10b of the bumper 10, the peripheral edge of the rectangular hole 15a and the trapezoidal hole 15b that form the deformation absorbing portion 15, that is, the intermediate portion 10b between the rectangular hole 15a and the trapezoidal hole 15b is viewed in the vehicle 1 left-right direction. Bending toward the center absorbs thermal deformation toward the center at the intermediate portion 10b. This suppresses the intermediate portion 10b from being bent and deformed in the front-rear direction in the traveling direction (front-rear direction) of the vehicle 1.

In particular, since the trapezoidal hole 15b is provided such that the short side 17b is directed toward the center of the vehicle 1 in the left-right direction, the left and right peripheral edges (intermediate portion 10b) of the trapezoidal hole 15b are positively moved toward the center. Since it is bent, it is possible to prevent the intermediate portion 10b from being distorted in a direction other than the lateral direction of the vehicle 1. Since the front surface of the deformation absorbing portion 15 (intermediate portion 10b) is covered by the cover 12, the deformation absorbing portion 15 (rectangular hole 15a and trapezoidal hole 15b) cannot be seen from the outside because the bending due to thermal deformation cannot be seen from the outside. It is possible to prevent deterioration of appearance due to thermal deformation of the portion 10b.

Further, the ribs 18 provided on the peripheral edges of the rectangular hole 15a and the trapezoidal hole 15b have bumper 10 (intermediate portion 10b) formed by providing the deformation absorbing portion 15 (rectangular hole 15a and trapezoidal hole 15b) at the intermediate portion 10b of the bumper 10. ) Is guaranteed to reduce the rigidity. That is, by providing the ribs 18 on the periphery of the rectangular hole 15a and the trapezoidal hole 15b, it is possible to increase the rigidity with respect to the force applied in the vertical direction of the intermediate portion 10b of the bumper 10 and in the front-back direction when viewed in the traveling direction of the vehicle 1, and the deformation It is possible to ensure the reduction in rigidity of the bumper 10 due to the absorption portion 15 being provided in the intermediate portion 10b.

Further, the cover 12 is locked vertically at the intermediate portion 10b as viewed in the direction of gravity of the deformation absorbing portion 15, so that the claw portion 13 of the cover 12 causes thermal deformation of the deformation absorbing portion 15 in the left-right direction of the vehicle 1, that is, The absorption of thermal deformation due to the bending of the intermediate portion 10b is not hindered, and the deformation direction of the intermediate portion 10b of the bumper 10 is suppressed. Specifically, when the deformation absorbing portion 15 is deformed due to the thermal deformation of the intermediate portion 10b of the bumper 10, the cover 12 is locked above and below the deformation absorbing portion 15, so that the deformation outward in the vertical direction can be suppressed. Therefore, it is advantageous in improving the appearance of the bumper 10. Further, since the cover 12 supports the intermediate portion 10b above and below the deformation absorbing portion 15, the cover 12 can reinforce the intermediate portion 10b whose rigidity is reduced by the rectangular hole 15a and the trapezoidal hole 15b of the deformation absorbing portion 15. it can.

On the other hand, in the cover 12, since the locked hole 16b has a long hole shape with a gap in the left-right direction with respect to the locking claw 13b, the intermediate portion 10b bends in the left-right direction of the vehicle 1 by the gap. It is possible. This allows the intermediate portion 10b and the cover 12 to continue to be locked to the intermediate portion 10b while allowing the bending due to the relative thermal deformation of the cover 12 in the left-right direction of the vehicle 1.

As described above, in the bumper unit 3 according to the present invention, the bumper 10 arranged in the front part of the vehicle 1 and the pair of headlamps 5, 105 provided on the bumper 10 and mounted on the left and right of the vehicle 1. A pair of lamp holes 10a and 110a respectively fitted with the deformation hole 15a and a trapezoidal hole 15b provided in the intermediate portion 10b of the bumper 10 sandwiched between the pair of lamp holes 10a and 110a; A cover 12 that is attached to the front surface of the intermediate portion 10b so as to cover the deformation absorbing portion 15; and a claw portion 13 that is provided on the upper end, the lower end, or both of the cover 12 and that attaches the cover 12 to the intermediate portion 10b of the bumper 10. It is composed of.

Therefore, when the intermediate portion 10b between the lamp holes 10a and 110a of the bumper 10 expands toward the center when viewed in the left-right direction of the vehicle 1 due to heat such as the outside temperature, the upper and lower ends are assembled to the intermediate portion 10b of the bumper 10. Since the peripheral edges of the rectangular hole 15a and the trapezoidal hole 15b of the deformation absorbing portion 15 covered by the cover 12 are bent toward the center so that the thermal deformation can be absorbed, the vehicle 1 of the intermediate portion 10b of the bumper 10 can be absorbed. It is possible to suppress the expansion and deformation in the left-right direction from causing distortion in the up-down direction and the traveling direction (front-rear direction) of the vehicle 1. Further, the cover 12 can cover the bending due to the thermal deformation of the deformation absorbing portion 15, and it is possible to prevent the design of the bumper 10 from being impaired due to the deformation of the bumper 10 due to the thermal expansion.

Further, the upper and lower ends of the cover 12 are provided with the claw portions 13 which are assembly parts, and the cover retaining holes 16 which are the assembly holes to which the claw parts 13 are assembled are provided above and below the deformation absorbing part 15 of the intermediate portion 10b. Therefore, the peripheral edges of the rectangular hole 15a and the trapezoidal hole 15b of the deformation absorbing portion 15 do not hinder the thermal deformation of the peripheral edge of the rectangular hole 15a and the trapezoidal hole 15b toward the center side in the vehicle 1 left-right direction. In addition, since the cover 12 is attached to the upper and lower sides of the deformation absorbing portion 15 (intermediate portion 10b), the upper and lower sides of the deformation absorbing portion 15 are supported by the cover 12, so that the deformation absorbing portion 15 (the rectangular hole 15a and the trapezoidal hole 15b). The intermediate portion 10b whose rigidity has been lowered by) is reinforced by the cover 12. That is, the appearance of the bumper 10 can be improved while ensuring the rigidity of the intermediate portion 10b.

Further, the cover retaining hole 16 is composed of a pilot hole 16a located at the center of the intermediate portion 10b in the left-right direction of the vehicle 1 and a locked hole 16b provided at symmetrical positions and having a long hole shape elongated in the left-right direction of the vehicle 1. In addition to the configuration, the claw portion 13 is relatively displaced in the left-right direction of the vehicle 1 with respect to the pilot pin 13a located in the center of the cover 12 in the left-right direction of the vehicle 1 and fitted in the pilot hole 16a. Since the bumper 10 is configured to be capable of being locked, the deformation of the bumper 10 due to thermal expansion causes the cover 12 in the left-right direction of the vehicle 1 with respect to the center of the intermediate portion 10b (bumper 10) in the left-right direction of the vehicle 1. It is possible to allow relative displacement of the intermediate portion 10b (bumper 10) and the cover 12 in the left-right direction of the vehicle 1 without shifting the center position. Therefore, the displacement of the cover 12 and the distortion due to thermal deformation can be suppressed, and the appearance can be prevented from deteriorating.

Further, the deformation absorbing portion 15 is configured such that the plurality of openings, that is, the plurality of rectangular holes 15a and the trapezoidal holes 15b are arranged symmetrically in the left-right direction of the vehicle 1, so that the rigidity of the intermediate portion 10b is prevented from decreasing. The area of the opening can be secured, and the left and right portions of the intermediate portion 10b can be deformed evenly and in good balance.
Further, ribs 18 are provided on the periphery of the rectangular holes 15a and the trapezoidal holes 15b forming the deformation absorbing portion 15 and extend perpendicularly to the surface of the bumper 10 forming the rectangular holes 15a and the trapezoidal holes 15b. Therefore, the rigidity of the intermediate portion 10b of the bumper 10 which is reduced by providing the rectangular hole 15a and the trapezoidal hole 15b in the bumper 10 can be ensured by having the rib 18.

Since the rectangular hole 15a and the trapezoidal hole 15b forming the deformation absorbing portion 15 have a longer width dimension in the vertical direction than the lateral dimension in the horizontal direction, the rectangular hole 15a and the trapezoidal hole 15b should be provided in the intermediate portion 10b. As a result, it is possible to reduce the decrease in rigidity in the vertical direction of the intermediate portion 10b when viewed in the direction of gravity, and it is possible to easily deform the vehicle 1 in the left-right direction as compared with the deformation in the vertical direction of the deformation absorbing portion 15. it can.

Since the trapezoidal hole 15b has a short side 17b whose part of the peripheral edge is recessed toward the center when viewed in the left-right direction of the vehicle 1, due to the distortion of the intermediate portion 10b toward the center due to thermal deformation of the bumper 10. It is possible to prevent the peripheral edge of the trapezoidal hole 15b from being positively bent in the left-right direction of the vehicle 1 and to be distorted in a direction other than the left-right direction of the vehicle 1 of the intermediate portion 10b, and to suppress deterioration of appearance.

<Second Embodiment>
The second embodiment will be described below with reference to FIG. 7.
It should be noted that the description of the configuration common to the first embodiment will be omitted, and only the portions different from the first embodiment will be described here.
Referring to FIG. 7, there is shown a front view of the bumper 10 (intermediate portion 10b) provided with the octagonal hole 15c. That is, the deformation absorbing portion 15 in the second embodiment is provided with an octagonal hole (opening) 15c instead of the trapezoidal hole 15b. The octagonal hole 15c has a shape in which a short side 17c is provided on the outer side of the trapezoidal hole 15b when viewed in the left-right direction of the vehicle 1.

As a result, the upper and lower roots of the intermediate portion 10b between the openings (the rectangular hole 15a and the octagonal hole 15c) where stress is likely to concentrate can be thickened, and the rigidity in the vertical direction can be improved. Further, since the opening area is larger than that of the trapezoidal hole 15b, the thermal deformation of the intermediate portion 10b can be more tolerated.
<Third Embodiment>
The third embodiment will be described below with reference to FIG.

Referring to FIG. 8, there is shown a front view of the bumper 10 (intermediate portion 10b) provided with an elliptical hole (opening) 15d. That is, the deformation absorbing portion 15 in the third embodiment is provided with the elliptical hole 15d instead of the rectangular hole 15a and the trapezoidal hole 15b. The elliptical hole 15d is an elliptical hole having a width dimension that is longer in the vertical direction than in the lateral direction of the vehicle 1.
As a result, a smooth hole with no corners is formed, so that it is possible to prevent stress concentration from occurring due to thermal deformation of the bumper 10 and prevent cracks from occurring.

As described above, in the bumper unit 3 according to the third embodiment, since the elliptical hole 15d has an elliptical shape, it is necessary to avoid providing a location where stress concentration occurs on the peripheral edge forming the elliptical hole 15d. You can In addition, since the elliptical hole 15d has an elliptical shape that is long in the vertical direction, it is possible to secure more rigidity against a load in the vertical direction.
<Fourth Embodiment>
The fourth embodiment will be described below with reference to FIG.

Referring to FIG. 9, there is shown a front view of the bumper 10 (intermediate portion 10b) provided with the honeycomb type holes (openings) 15e. That is, the deformation absorbing portion 15 in the fourth embodiment is provided with a honeycomb-shaped hole 15e configured by providing a plurality of small trapezoidal holes instead of the rectangular holes 15a and the trapezoidal holes 15b.
As a result, since the number of holes is larger than that of the rectangular holes 15a and the trapezoidal holes 15b, the deformation absorbing portion 15 can absorb heat deformation in the left-right direction of the vehicle 1 satisfactorily.

<Fifth Embodiment>
The fifth embodiment will be described below with reference to FIG.
Referring to FIG. 10, there is shown a front view of the bumper 10 (intermediate portion 10b) provided with an hourglass-shaped hole (opening) 15f and a crescent-shaped hole (opening) 15g. That is, in the deformation absorbing portion 15 in the fifth embodiment, instead of the rectangular hole 15a provided at the center when viewed in the left-right direction of the vehicle 1, the left and right vertical extending portions of the peripheral edge of the opening are recessed toward the center. The hourglass-shaped hole 15f is further provided with a crescent-shaped hole 15g having an arcuate concave portion 17g directed toward the center instead of the rectangular hole 15a and the trapezoidal hole 15b provided in the left-right direction.

As a result, since the arc-shaped concave portion 17g is directed toward the center like the shape of the hole (see FIG. 6) after the thermal deformation of the bumper 10 (intermediate portion 10b), the drum shape due to the thermal deformation of the bumper 10 is formed. Since the directions of the left and right circular arcs on the periphery of the hole 15f and the crescent-shaped hole 15g do not change, the deformation of the hole shape due to the thermal deformation of the bumper 10 is small, and it is possible to suppress the occurrence of deterioration and cracks.

As described above, in the bumper unit 3 according to the fifth embodiment, since the concave portion 17g has an arc shape, the concave portion positively moves in the left-right direction of the vehicle 1 due to the distortion in the central direction due to the thermal deformation of the bumper 10. It is possible to prevent stress concentration from occurring in the concave portion 17g when it flexes.
The description of the bumper unit according to the present invention has been completed above, but the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the invention.

For example, in the present embodiment, the bumper unit 3 provided in the front portion of the vehicle 1 has been described, but the bumper unit 3 provided in the rear portion of the vehicle may be used.
Further, in the present embodiment, various shapes of the opening of the deformation absorbing portion 15 are described, but other shapes may be used.
Further, in the present embodiment, the rib 18 is provided so as to project backward so as to extend rearward when viewed in the traveling direction of the vehicle 1, but it may be projected forward.

1 Vehicle 3 Bumper unit 5, 105 Headlamp (lamp)
10 bumper 10a, 110a lamp hole 10b intermediate part 12 cover 13 claw part (assembly part)
13b Locking claw 15 Deformation absorbing part 15a Rectangular hole (opening)
15b Trapezoid hole (opening)
15d Elliptical hole (opening)
15g Crescent-shaped hole (opening)
16 Cover retaining hole (attached hole)
16b Locked hole 17b Short side (recess)
17g recess 18 rib

Claims (9)

A bumper arranged at the front or rear of the vehicle,
A pair of lamp holes formed in the bumper and fitted so that a pair of lamps mounted on the left and right of the vehicle are exposed,
A deformation absorbing portion provided at an intermediate portion sandwiched between the pair of lamp holes of the bumper, the deformation absorbing portion including a plurality of openings,
A cover assembled to the bumper so as to cover the deformation absorbing portion,
A bumper unit for a vehicle, wherein at least one of the openings has a concave portion in which a part or all of the left and right of the peripheral edge is recessed toward the center when viewed in the left-right direction of the vehicle. The cover has an assembling portion at an upper end and a lower end thereof for assembling the cover at an intermediate portion of the bumper,
The bumper unit for a vehicle according to claim 1, wherein the intermediate portion has an assembling hole portion to which the assembling portion is assembled at a position above or below the deformation absorbing portion. The to-be-assembled hole portion includes an engaged hole having a long hole shape which is provided at symmetrical positions and is long in the vehicle left-right direction,
The bumper unit for a vehicle according to claim 2, wherein the assembly portion includes a locking claw that is locked so as to be relatively displaceable in the vehicle left-right direction with respect to the locked hole. The to-be-assembled hole portion further includes a pilot hole located at the center of the intermediate portion in the vehicle left-right direction,
The bumper unit for a vehicle according to claim 3, wherein the assembling portion further includes a pilot pin located at a center of the cover in the vehicle left-right direction and fitted into the pilot hole. The bumper unit for a vehicle according to any one of claims 1 to 4, wherein the deformation absorbing portion is configured by arranging the plurality of openings in the intermediate portion in a lateral direction of the vehicle in a laterally symmetrical manner. The vehicle according to any one of claims 1 to 5, wherein a rib extending perpendicularly to a surface of an intermediate portion of the bumper in which the opening is formed is provided along a peripheral edge of the opening. Bumper unit. 7. The bumper for a vehicle according to claim 1, wherein at least one of the openings has a width dimension in a vertical direction of the vehicle longer than a width dimension in a lateral direction of the vehicle. unit. The bumper unit for a vehicle according to any one of claims 1 to 7, wherein the recess has an arc shape. 10. The bumper unit for a vehicle according to claim 1, wherein at least one of the openings has an elliptical shape.

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