JP2006240391A - Mounting structure for head lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure for a head lamp capable of smoothly moving the head lamp to a rear side of a bumper reinforce while suppressing the generation of reaction force, when a front surface collision input is inputted in a head lamp arranged part. <P>SOLUTION: A mounting bracket 12 is provided so as to surround an outer lens 11 of the head lamp 10, and the head lamp 10 is mounted to the bumper reinforce 6 by using a vehicular width direction inner end portion of the mounting bracket 12 as a fulcrum P. The head lamp P rotates a second end portion side to a vehicle rear side about the fulcrum P. When front collision input acts on the head lamp 10, the head lamp 10 is smoothly moved to the rear side of the bumper reinforce 6, and a bumper fascia can be largely bent and deformed to the rear side of a vehicle body. A predetermined output value is generated on a collision sensor 3 arrange at a bumper fascia front surface portion, thereby making a hood lifting mechanism normally operate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headlamp mounting structure, and more particularly, to a head in an automobile in which a collision sensor that outputs a detection signal to a hood flip-up mechanism with a predetermined rearward deformation stroke by a frontal collision input is disposed on a front face of a bumper fascia of a front bumper The present invention relates to a lamp mounting structure.

  As a pedestrian protection measure in automobiles, the input load when the pedestrian's leg collides with the front bumper is detected, the engine hood is flipped up, the required downward deformation stroke is secured in the engine hood, and the pedestrian Is known to be able to be buffered by the downward deformation of the engine hood when it interferes with the engine hood.

  As such an engine hood jumping means, a collision sensor that outputs a signal by bending and deforming a predetermined stroke backward by a collision input of a predetermined value or more is disposed on the front surface of the bumper fascia of the front bumper, and the collision sensor Based on this detection signal, a system that instantaneously activates the hood flip-up mechanism is employed.

On the other hand, along with the hood jumping up, the headlamp arranged close to the upper part of the front bumper is rotated downward on the rear end centering on the front lamp lower end against the collision input from the front. The thing which made it exhibit a buffer function by doing is known (for example, refer patent document 1).
Japanese Patent Laying-Open No. 2004-237795 (page 5, FIG. 5)

  The headlamp is placed close to the upper surface of the front bumper for modeling reasons at the front of the vehicle body.In addition, the front lamp lower end of the headlamp from the bumper reinforcement to give a continuity with the front of the bumper fascia May also be offset in the front.

  In such a headlamp arrangement, when the pedestrian's leg collides with the front bumper, the collision sensor bends and deforms rearward of the vehicle together with the bumper fascia and the cushioning material disposed inside the bumper fascia. However, there is a possibility that a predetermined output value cannot be obtained due to restriction at the front lower end of the headlamp, and the hood flip-up mechanism cannot be operated properly.

  Even if this is a headlamp mounting structure in which the rear end of the headlamp is rotated downward with its front lower end as a fulcrum as shown in the above-mentioned Patent Document 1, the rear of the bumper fascia and the collision sensor Since the amount of bending deformation is restricted at the headlamp front end position, the same result is obtained.

  Therefore, the present invention provides a headlamp mounting structure that can smoothly move the headlamp to the rear of the bumper reinforcement while suppressing reaction force when frontal collision input is input to the headlamp arrangement portion of the front bumper. Is to provide.

  In the present invention, the bumper fascia front portion of the front bumper is provided with a collision sensor that outputs a detection signal to the hood flip-up mechanism with a predetermined rearward deformation stroke by front collision input, and the head is disposed above the front bumper. A car with lamps arranged close to each other, and the headlamp can be rotated at the rear end of the vehicle on the other end side with the left or right end as a fulcrum with respect to a front collision input exceeding a predetermined value. The most important feature is that it is attached to the vehicle body side member.

  According to the present invention, since the headlamp is rotatable about one end, the headlamp easily rotates backward about the fulcrum when a forward collision input acts on the headlamp. Thus, it is possible to smoothly move the headlamp behind the bumper reinforcement while suppressing generation of reaction force.

  Therefore, even when a pedestrian's leg interferes with the headlamp placement part of the front bumper, the bumper fascia is greatly deflected and deformed rearward of the vehicle without causing the headlamp to become an obstacle. A predetermined output value is generated in the sensor, and the hood flip-up mechanism can be operated normally.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 6 show a first embodiment of a headlamp mounting structure according to the present invention. FIG. 1 is a cross-sectional view of a front portion of a vehicle body where a headlamp is disposed. FIG. 2 is a perspective view of a headlamp mounting portion. 3 is an enlarged perspective view of a portion A in FIG. 2, FIG. 4 is a plan view of a mounting portion of a normal headlamp in FIG. 2A, and FIG. FIG. 6A is a plan view of the mounting portion of the headlamp when a collision load is input, and FIG. 6B is an explanatory view showing an enlarged plan view of the locking means. FIG. 6 shows the reaction force when the headlamp moves backward. It is explanatory drawing shown in comparison with.

  In the headlamp mounting structure of the present embodiment, as shown in FIG. 1, headlamps 10 provided on both sides in the vehicle width direction are disposed close to the front bumper 1, and the front portion of the bumper fascia 2 of the front bumper 1. The collision sensor 3 is disposed in the hood, and when the collision sensor 3 moves backward with a predetermined rearward deformation stroke together with the bumper fascia 2 by the frontal collision input F, a hood flip-up mechanism 5 provided on the engine hood 4 from the collision sensor 3. A detection signal is output to the engine hood 4 to lift a predetermined amount.

  The front bumper 1 has an EA material 7 disposed on the front surface of a bumper reinforcement 6 as a bumper aggregate, and the front side thereof is covered with the bumper fascia 2. The collision sensor 3 is arranged in the formed recess 7a.

  As described above, the headlamp 10 is disposed close to the upper surface portion of the front bumper 1, and the front lower end 10 a of the headlamp 10 is offset from the bumper reinforcement 6 by a predetermined amount K. The headlamp 10 and the front face of the bumper fascia 2 have a continuity.

  Here, in the present invention, as shown in FIG. 2, the headlamp 10 has either one of left and right end portions (inward in the vehicle width direction) with respect to the front collision input F of a predetermined value or more. Is the fulcrum P, and the other end (outward in the vehicle width direction) is attached to the bumper reinforcement 6 as a vehicle body side member so that it can be rotated rearward of the vehicle.

  In FIG. 2, the headlamp 10 is provided with a mounting bracket 12 so as to surround an outer lens 11 provided at the front end, and the headlamp 10 is attached to the bumper reinforcement 6 via the mounting bracket 12. Yes.

  The mounting bracket 12 surrounds the outer lens 11 so that the mounting bracket 12 is disposed at least over the left and right ends of the headlamp 10, and the fulcrum P is provided on the mounting bracket 12.

  The mounting bracket 12 is formed to be bent or curved in a shape along the outer periphery of the outer lens 11, and a plurality of mounting pieces 12 a are protruded from the mounting bracket 12 at appropriate intervals. A plurality of mounting plates 11 a projecting from the outer periphery are coupled to the mounting piece 12 a via bolts 13.

  The fulcrum P separates a part of the mounting bracket 12 in the vehicle width direction inward, and the separation end portions 12b and 12c project inward in the vehicle width direction to be flattened, and each is used as a rotation center. is there.

  On the other hand, a U-shaped bracket 14 is coupled to the upper surface of the bumper reinforcement 6 via a bolt 15 at the fulcrum P, and a pair of upper and lower flanges 14a projecting outward from the rear surface of the U-shaped bracket 14 in the vehicle width direction. In the middle, the separation end portions 12 b and 12 c of the mounting bracket 12 are rotatably mounted via pins 16.

  In the present embodiment, the mounting bracket 12 is normally locked to the bumper reinforcement 6 on the mounting bracket 12, and is unlocked by a frontal collision input F that is equal to or greater than a predetermined value so that the fulcrum P is Locking means 20 that allows backward rotation is provided at the center.

  As shown in FIG. 3, the locking means 20 is formed on the bumper reinforcement 6 with a pin 21 as an engaging member projecting from the mounting bracket 12 so that the pin 21 can be moved back and forth. In addition, the engaging hole 22 is provided with a convex portion 22a as a resistance adding portion that applies a predetermined resistance force to the backward movement of the pin 21.

  That is, the pin 21 is suspended from the lower surface of the support plate 12d that protrudes outward in the horizontal direction from the lower part of the outer end in the vehicle width direction of the mounting bracket 12.

  Further, as shown in FIG. 4B, the engagement hole 22 is formed as a long hole extending substantially in the front-rear direction around the pin 21 on the upper surface 6 a of the bumper reinforcement 6. By forming the convex portion 22a on the inner edge in the vehicle width direction, the pin 21 is normally locked in the engagement hole 22 ahead of the convex portion 22a as shown in FIG. 4B. In this state, the front collision input F causes the pin 21 to move over the convex portion 22a and move to the rear of the engagement hole 22 as shown in FIG. 5B, and the pin 21 gets over the engagement hole 22. In this case, a predetermined resistance force is applied.

  With the above configuration, according to the present embodiment, as shown in FIG. 4A, the headlamp 10 can rotate with the inner end portion in the vehicle width direction as a fulcrum P. Therefore, as shown in FIG. Thus, when the front collision input F acts on the headlamp 10, the headlamp 10 easily rotates rearward around the fulcrum P, and the headlamp 10 generates a reaction force behind the bumper reinforcement 6. It can be moved smoothly while restraining.

  Accordingly, even when the pedestrian's leg interferes with the headlamp 10 placement portion of the front bumper 1, the headlamp 10 moves rearward from the front end of the bumper reinforcement 6, and therefore the headlamp 10 becomes an obstacle. The bumper facer 2 can be greatly bent and deformed rearward of the vehicle body while compressing the EA material 7.

  Therefore, a predetermined output value required for normal operation of the hood flip-up mechanism 5 is generated in the collision sensor 3 disposed on the front surface of the bumper fascia 2, specifically, the front surface of the EA material 7. The hood flip-up mechanism 5 can be operated normally.

  That is, when the reaction force characteristic when the headlamp 10 moves backward is shown in FIG. 6, the stroke of the conventional headlamp shown by the broken line in FIG. In the mounting structure, the reaction force suddenly rises within the range of the stroke S. However, in the headlamp mounting structure of this embodiment, the reaction force is kept low in the range of the stroke S as shown by the solid line in FIG. The stroke S can be ensured reliably.

  Further, the headlamp 10 is provided with a mounting bracket 12 disposed over the left and right ends thereof, and the fulcrum P is provided on the mounting bracket 12, so that it is necessary to process the fulcrum P on the headlamp 10 itself. Since there is no, the formation position of the fulcrum P can be arranged at the optimum position via the mounting bracket 12 without changing the design of the headlamp 10 in the modeling.

  Further, the mounting bracket 12 is normally locked to the bumper reinforcement 6 to the mounting bracket 12, and is unlocked by a front collision input F exceeding a predetermined value and rotated backward about the fulcrum P. Since the locking means 20 is provided to allow the headlamp 10 to be securely held at a predetermined position by the locking means 20 during normal operation (see FIG. 4B), the engagement of the locking means 20 during a frontal collision. By releasing the stop, the headlamp 10 can be reliably moved rearward (see FIG. 5B).

  Still further, the locking means 20 is formed on the bumper reinforcement 6 with the pin 21 protruding from the mounting bracket 12 so that the pin 21 can be moved back and forth, and the pin 21 can be moved backward. Since the engaging hole 22 is provided with the convex portion 22a for imparting the resistance force, the headlamp 10 can be reliably held at a predetermined position in a normal state by a simple structure, and can be moved backward in the case of a frontal collision. it can.

  7 and 8 show a second embodiment of the present invention, in which the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted, and FIG. FIG. 8 is a cross-sectional view of the locking means.

  The mounting structure of the headlamp of this embodiment is basically the same as that of the first embodiment, and the headlamp 10 is mounted to the bumper reinforcement 6 via the mounting bracket 12 as shown in FIG. The mounting bracket 12 is provided with a fulcrum P and locking means 20A.

  Here, this embodiment is mainly different from the first embodiment in that the locking means 20A protrudes from the mounting bracket 12, engages with the bumper reinforcement 6, and is broken by a frontal collision input. The fixing pin 23 is formed with a notch 23a as a part.

  Similar to the pin 21 of the first embodiment, the fixing pin 23 is suspended from the lower surface of the support plate 12d that protrudes outward in the horizontal direction from the lower part of the outer end of the mounting bracket 12 in the vehicle width direction. The fixing pin 23 is fitted in a mounting hole 6b formed in the upper surface 6a of the bumper reinforcement 6.

  The notch 23a is formed at a portion where the fixing pin 23 is connected to the support plate 12d, that is, at the outer periphery of the upper end of the fixing pin 23. When the front collision load F is input, the fixing pin 23 is moved from the notch 23a portion. It is designed to break.

  Accordingly, even in the present embodiment, as in the first embodiment, the headlamp 10 can be reliably held at a predetermined position by the fixing pin 23 in the normal state. Can be reliably moved backward.

  Further, in the present embodiment, the locking means 20A is constituted by the fixing pin 23 having the notch 23a projecting from the mounting bracket 12, so that the configuration of the locking means 20A can be further simplified.

  By the way, the present invention has been described by taking the first and second embodiments as examples. However, the present invention is not limited to these embodiments, and various other embodiments can be adopted without departing from the gist of the present invention. For example, the vehicle body side member to which the mounting bracket 12 is attached is not limited to the bumper reinforcement 6, and may be a radiator core support that is disposed at the front end of the engine room and supports the radiator.

FIG. 3 is a front cross-sectional view of the vehicle body at the portion where the headlamp is disposed in the first embodiment of the invention. It is a perspective view of the headlamp attachment part in a 1st embodiment of the present invention. It is an expansion perspective view of the A section in FIG. It is explanatory drawing which shows the headlamp at the time of the normal time in 1st Embodiment of this invention with the top view of the attachment part to (a), and the enlarged plan view of a latching means to (b). It is explanatory drawing shown in the top view of the attachment part to the headlamp at the time of the collision load input in 1st Embodiment of this invention to (a), and the enlarged plan view of a latching means to (b). It is explanatory drawing which shows the reaction force at the time of the headlamp of this invention moving backward compared with the past. It is a principal part perspective view which shows the assembly | attachment state of the latching means in 2nd Embodiment of this invention. It is sectional drawing of the latching means in 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front bumper 3 Collision sensor 4 Engine hood 5 Hood lift mechanism 6 Bumper reinforcement (vehicle body side member)
DESCRIPTION OF SYMBOLS 10 Headlamp 12 Mounting bracket 20, 20A Locking means 21 Pin (engagement member)
22 Engagement hole 22a Convex part (resistance adding part)
23 Fixing pin 23a Notch (fragile part)
P fulcrum

Claims (5)

A front bumper facer is equipped with a collision sensor that outputs a detection signal to the hood flip-up mechanism with a predetermined rearward deformation stroke due to front collision input, and a headlamp close to the front bumper. There,
The headlamp is attached to the vehicle body side member so that either one of the left and right ends is a fulcrum with respect to a front collision input of a predetermined value or more and the other end can be rotated rearward of the vehicle. The headlamp mounting structure.   2. The headlamp mounting structure according to claim 1, wherein the headlamp is provided with a mounting bracket arranged at least over its left and right ends, and the fulcrum is provided on the mounting bracket.   A locking means for locking the mounting bracket to the vehicle body side member in a normal state and releasing the locking by a frontal collision input of a predetermined value or more and allowing a rearward rotation around the fulcrum. The headlamp mounting structure according to claim 2, wherein the headlamp mounting structure is provided. The locking means includes an engaging member protruding from the mounting bracket,
The engagement member is formed on the vehicle body side member so that the engagement member can be moved back and forth, and an engagement hole provided with a resistance adding portion that applies a predetermined resistance force to the rearward movement of the engagement member. The headlamp mounting structure according to claim 3.   4. The headlamp according to claim 3, wherein the locking means is a fixed pin that protrudes from the mounting bracket, engages with the vehicle body side member, and forms a fragile portion that is broken by a frontal collision input. Mounting structure.

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