JP4400883B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp that uses a deformation of an extension reflector provided along the inside of a front cover to mitigate an impact at the time of a collision.

As this type of prior art, many proposals represented by Patent Document 1 below have been made. In the following Patent Document 1, as shown in FIG. 12, a light source unit u in which a light source 3 and a reflector 4 are integrated is housed in a lamp chamber defined by a lamp body 1 and a synthetic resin front cover 2. A thin synthetic resin extension reflector 5 surrounding u is disposed along the inside of the front cover 2, and at least a part of the front cover 2 is formed thin so that an impact force f acting on the front cover 2 f Thus, there is known a vehicular lamp in which the front cover 2 and the extension reflector 5 are bent and deformed rearward to absorb the impact at the time of collision.
Japanese Patent Laid-Open No. 2001-236813 (FIGS. 2, 5, and 6)

  However, in Patent Document 1, when the rearward deformation of the front cover 2 and the extension reflector 5 is in the state indicated by the phantom line in FIG. 12, the rearward deformation of the front cover 2 is prevented by the extension reflector 5. There is no impact absorption effect. That is, since the front cover 2 cannot be deformed, there is a problem that the reaction force of the force acting on the lamp body 1 and the vehicle body acts as an impact on a person and cannot be said to have a sufficient impact absorbing effect.

  Therefore, the inventor makes the front cover 2 and the extension reflector 5 both elastically deform and absorb the impact, and the elastically deformed region of the extension reflector 5 is cut with respect to the peripheral portion for a large impact force. Therefore, it was considered that the extension reflector 5 should not disturb the rearward deformation of the front cover 2.

  As such a structure, a plurality of peripheral portions of the extension reflector 5 are fixed to the front cover 2 (screw fastening), and the thin portion between the attachment fixed portion of the extension reflector 5 to the front cover 2 and the extension reflector main body is weak. When a prototype (headlamp) having a portion (groove) was made and the impact test was repeated and verified, it was confirmed that it was effective.

  The present invention has been made in view of the above-described problems of the prior art. The purpose of the present invention is to provide an impact to a person by deforming the front cover and the extension reflector rearward when an impact force acts on the lamp during a car collision. However, it is an object of the present invention to provide a vehicular lamp in which the extension reflector does not hinder the rearward deformation of the front cover.

In order to achieve the above object, in the vehicular lamp according to claim 1, a light source unit in which a light source and a reflector are integrated is housed in a lamp chamber defined by a lamp body and a synthetic resin front cover, In a vehicular lamp in which a synthetic resin extension reflector surrounding the light source unit is disposed along the inside of the front cover, and at least a part of the front cover is formed thin, a peripheral portion of the extension reflector is provided. A plurality of locations are fixed to the front cover, and between the attachment and fixing portion of the extension reflector with the front cover and the extension reflector main body, a thin wall that is cut by an impact at the time of a collision that acts via the front cover. It was configured to provide a fragile part.
(Operation) As means for fixing the attachment fixing portion of the extension reflector to the front cover to the front cover, screw fastening, concave / convex lance engagement, or the like can be considered.

  When an automobile collides with a pedestrian, an impact force acts on the front cover of the vehicular lamp, but the seal leg on the peripheral edge of the front cover engages with the seal groove of the lamp body that is fixedly attached to the vehicle body and moves backward. Since the movement is blocked, the substantially central region of the front cover is elastically deformed in the direction of impact force action, and the extension reflector arranged inside the front cover is also pushed by the front cover and integrally elastically deformed. The impact at the time of collision is absorbed. In addition, when a large impact force that cannot be absorbed by the elastic deformation of the front cover and extension reflector alone is applied, the impact force (stress) acting on the extension reflector is concentrated on the thin fragile part via the elastically deformed front cover. Then, the weak part is cut, and the front cover is further elastically deformed without being damaged, so that the impact at the time of collision is absorbed.

  When assembling a lamp component as a lamp, the extension reflector is attached to the lamp body and positioned with respect to the light source unit, and then the extension reflector is attached to the conventional vehicle lamp assembly process in which the front cover is assembled to the lamp body. The extension reflector can be positioned with respect to the light source unit simply by assembling the front cover that has been attached and fixed in advance to the lamp body that houses the light source unit, and the assembly process of the vehicle lamp is simplified.

  According to a second aspect of the present invention, in the vehicular lamp according to the first aspect, a boss is protruded on the rear side of the front cover, and an attachment fixing portion of the extension reflector with the front cover is provided on the extension reflector main body. The boss engagement hole provided on the front surface side engages with the boss, and the fragile portion is provided around the boss engagement hole in the extension reflector body.

  (Operation) Since the peripheral portion of the boss engagement hole provided with the thin fragile portion is configured as a bent portion with respect to the extension reflector body, the impact stress is easily concentrated so that the thin fragile portion is smooth. Easy to be cut.

  The extension reflector must be placed so that it does not interfere with the light source unit in the lamp chamber. The front cover and the lamp body (the light source unit housed in the front cover and the lamp body) The position of the boss and the boss engaging part on the front cover and extension reflector is determined in advance by considering the arrangement of the light source unit in the lamp chamber. By setting the position to the position where the extension reflector placed in the lamp compartment through the front cover does not interfere with the light source unit in the lamp compartment, it is easy to attach the extension reflector to the front cover. The front cover with integrated extension reflector If Kumitsukere to Npubodi, extension reflector becomes a predetermined position not interfering against naturally source unit.

According to a third aspect of the present invention, in the vehicular lamp according to the first or second aspect, the light source unit is configured as a reflective light source unit including a substantially parabolic reflector, and a thin wall is formed at a front edge portion of the reflector. It was configured to provide a vulnerable part.
(Operation) The impact at the time of collision is absorbed by the fragile portion of the extension reflector being broken and the fragile portion of the front edge of the reflector being broken by elastic deformation of the front cover.

In Claim 4, The vehicle lamp in any one of Claims 1-3 WHEREIN: While supporting the said reflector so that tilting is possible by the aiming mechanism, the structure which protruded the bracket for aiming mechanism attachment in the said reflector main body Thus, the bracket is provided with a thin fragile portion that is damaged by an impact force acting through the elastically deformed front cover and the reflector body.
(Operation) The impact at the time of collision is that the front cover is elastically deformed, so that the weak part of the extension reflector is cut, the weak part of the reflector's leading edge is destroyed, and the reflector's aiming mechanism mounting bracket is destroyed. To be absorbed.

  According to the vehicular lamp of the first aspect, not only when the impact force that does not lead to the cutting of the fragile portion acts but also when the impact force that is large enough to cut the fragile portion acts, the front cover Since it is elastically deformed without damage and absorbs the impact, it can effectively absorb the impact at the time of collision without hurting people.

  Further, since the front cover, in which the extension reflector is previously attached and integrated, can be assembled to the lamp body, it can be assembled as a vehicular lamp, so that the assembling process of the vehicular lamp is simplified.

  According to the second aspect, when a large impact force is applied, the thin fragile portion of the extension reflector is cut smoothly, and the front cover is elastically deformed without being damaged and absorbs the impact. The impact at the time of collision can be absorbed even more effectively.

  Also, if the front cover with the boss and boss engaging part fitted together and screwed into the extension reflector is assembled to the lamp body, the extension reflector will be placed at a predetermined position where it will not interfere with the light source unit. The process becomes even easier.

  According to the third aspect, since the impact at the time of collision is absorbed by elastic deformation of the front cover, cutting at the weak part of the extension reflector, and destruction at the weak part of the front edge of the reflector, the person is not further damaged. .

  Next, embodiments of the present invention will be described based on examples.

  1 to 11 show a first embodiment of the present invention. FIG. 1 is a front view of an automotive headlamp according to the first embodiment of the present invention. FIG. 2 is a plan view of the headlamp. Is a horizontal sectional view of the headlamp (sectional view taken along line III-III shown in FIG. 1), FIG. 4 is a longitudinal sectional view of the headlamp (sectional view taken along line IV-IV shown in FIG. 1), FIG. FIG. 6 is a diagram showing an aiming mechanism for adjusting the tilt of the low beam forming light source unit (cross-sectional view taken along line VV shown in FIG. 1), and FIG. 6 is a diagram showing the aiming mechanism for adjusting the tilt of the traveling beam forming light source unit. FIG. 7 is a front view of the extension reflector, FIG. 8 is a plan view of the extension reflector, FIG. 9 is a left side view of the extension reflector, and FIG. 10 is a boss on the front cover side. And Ek Schematic view showing an enlarged boss engagement hole of the tension reflector side, FIG. 11 is an explanatory view to explain a function of impact force acting on the front cover is absorbed.

  In these drawings, reference numeral 10 denotes a synthetic resin container-like lamp body. A synthetic resin front cover 20 is assembled to the front opening of the lamp body 10 to define a lamp chamber S. In the lamp chamber S, a light source unit U1 for forming a low beam in which a bulb 31 as a light source is inserted into a parabolic reflector 30 and a bulb 37 as a light source in a parabolic reflector 36 are inserted. A beam forming light source unit U2 is arranged adjacent to the left and right. Between the reflector 30 (36) and the lamp body 10, an aiming mechanism E1 (E2) composed of aiming screws 32a, 32b (38a, 38b) and a ball joint 32c (38c) is interposed, and the aiming mechanism E1 ( By the operation of E2), the optical axis of the light source unit U1 (U2) can be tilted and adjusted in the vertical and horizontal directions.

  Reference numeral 39 denotes a clearance bulb provided at the position where the light source unit U1 is provided in the lamp body 10, and the bulb sphere 39a passes through a through hole 36a (see FIG. 3) provided in the reflector 36 of the light source unit U2. Projecting forward.

  Reference numeral 40 denotes a turn signal bulb provided below the position where the light source unit U1 is disposed in the lamp body 10, reference numeral 46 denotes a reflector of the turn signal bulb fixed to the lamp body 10, and the bulb 40a is a reflector 46. And protrudes forward through a through-hole 46a (see FIG. 4).

  As shown in FIGS. 1 to 6, the front opening of the lamp body 10 of the headlamp opens from the front to the side of the vehicle body, and the front surface of the seal leg 21 assembled to the seal groove 11 of the lamp body 10. The cover 20 is also largely turned from the front to the side of the vehicle body, and the headlamp (front cover 20) is formed in a shape having a slant angle that is inclined more rearward as the upper side thereof is increased. An extension is formed on the inner side of the front cover 20 so as to surround the light source unit U1 (U2) so that the entire interior of the lamp chamber S has a mirror surface color similar to that of the reflectors 30 and 36. A reflector 34 is disposed along the front cover 20.

  The extension reflector 34 is formed in a shape that follows the inclination of the front cover 20, and is provided with substantially circular openings 34 a and 34 b corresponding to the reflectors 30 and 36 and a substantially horizontally long rectangular opening 34 c corresponding to the reflector 46. It has been.

  In addition, the extension reflector 34 is fixed to the front cover 20 at four substantially equal circumferential positions (two places on the upper side and two places on the lower side), and the extension reflector 34 is attached to the front cover 20. A thin fragile portion is provided between the fixed portion and the extension reflector main body (a region excluding the mounting and fixing portion of the extension reflector 34) 34A, and the extension reflector 34 is thinned by an impact force acting on the front cover 20 at the time of an automobile collision. The impact force is absorbed by being cut at the fragile portion.

  Specifically, as shown in FIGS. 10 and 11, four bosses 50 provided with screw insertion holes (baka holes) 52 are provided on the rear side of the peripheral edge of the front cover 20 so as to protrude at substantially equal intervals in the circumferential direction. On the other hand, at the position corresponding to the boss 50 on the front cover 20 side in the extension reflector 34, a bottomed tube that is a fixing part for fixing to the front cover 20 that defines a boss engagement hole 62 that opens to the front side. A portion 60 is formed to protrude from the back side of the extension reflector main body 34A. A screw insertion hole 64 is provided in the bottom wall of the bottomed cylindrical portion 62, and a fastening screw (tapping screw) is inserted into the screw insertion hole 52 of the boss 50 that engages with the engagement hole 62 through the screw insertion hole 64. The extension reflector 34 is fixed to the front cover 20 by screwing the bosses 50 and the bottomed cylindrical portion 60 provided at approximately four locations in the circumferential direction by screwing 70.

  Further, as shown in FIG. 11, the design surface area of the front cover 20 is formed so as to become thinner (t1 <t2) as it goes upward, and the front cover 20 is easily elastically deformed against the impact force F at the time of collision. The impact force is absorbed. That is, when the automobile collides with a pedestrian, an impact force F acts on the front cover 20 of the headlamp, but the seal leg 21 at the peripheral edge of the front cover 20 is attached to the vehicle body and is fixed to the seal groove 11 of the lamp body 10. And the rearward movement is prevented, so that if the impact force is relatively small, the substantially central region of the front cover 20 is elastically deformed in the direction of the impact force and is disposed inside the front cover 20. The extension reflector 34 is also pushed by the front cover 20 and elastically deforms integrally with it, so that the impact at the time of collision is absorbed.

  Furthermore, an annular V-shaped groove 66, which is a thin fragile portion, is provided at the base of the bottomed cylindrical portion 60 on the back side of the extension reflector main body 34A, and the extension reflector main body 34A is provided via the front cover 20 that is elastically deformed. When an impact force of a magnitude that cannot be absorbed by only the elastic deformation of the front cover 20 and the extension reflector 34 is applied, the extension reflector main body 34 </ b> A has an annular V shape with respect to the bottomed cylindrical portion 60 fixed to the boss 50. The impact force is absorbed by being cut in the groove 66.

  Further, as shown in FIGS. 5 and 11, a V-shaped groove 30a (36a), which is a thin fragile portion, is provided along the front edge on the outside of the front edge portion of the reflector 30 (36) and elastically deforms. The front edge of the reflector 30 (36) is bent at the position of the V-groove 30a (36a) by an impact force acting through the front cover 20 (see the phantom line in FIG. 11).

  Further, the reflector 30 (36) has brackets 131, 132, 133 (134, 135, 136) for mounting the aiming mechanism E1 (E2) on the back side of the reflector main body 30A (36A) having a reflection surface formed inside. The brackets 131, 132, 133 (134, 135, 136) are all formed thin and are elastically deformed through the front cover 20 and the reflector body 30 </ b> A (36 </ b> A). The bracket 131, 132, 133 (134, 135, 136) is easily bent by the acting impact force.

  Next, the impact absorbing structure of the present embodiment will be described in the case where an impact force F as shown in FIG.

  When the impact force F is small, the front cover 20 is first pressed backward, and the extension reflector 34 is also elastically deformed integrally with the front cover 20 to absorb the impact.

  When the impact force F is large (when an impact force that cannot be absorbed by elastic deformation of the front cover 20 and the extension reflector 34 is applied), the extension fixed to the boss 50 on the front cover 20 side. The extension reflector main body 34A is cut at the annular V-shaped groove 66 with respect to the bottomed cylindrical portion 60 which is the attachment fixing portion on the reflector 34 side, so that the impact force is absorbed.

  Further, when an impact force acts on the front edge portion of the reflector 30 (36) via the front cover 20 elastically deformed rearward or the extension reflector main body 34A cut and separated in the annular V-shaped groove 66, the reflector 30 ( The front edge of 36) is bent at the position of the V-groove 30a (36a), so that the impact force is absorbed.

  Furthermore, the impact force that cannot be absorbed even if the front edge of the reflector 30 (36) is bent is the aiming mechanism mounting brackets 131, 132, 133 (134, 135, 136) that are formed thinner than the conventional thickness. ) Is absorbed by bending.

  In this embodiment, since the extension reflector 34 is fixedly integrated with the front cover 20, when the lamp component is assembled as a headlamp, the extension reflector is assembled to the lamp body and positioned with respect to the light source units U1 and U2. Then, in contrast to the conventional assembly process of assembling the front cover 20 to the lamp body 10, the front cover 20 with the extension reflector 34 attached and fixed in advance is simply assembled to the lamp body 10 containing the light source units U1 and U2. The extension reflector 34 can be positioned with respect to the units U1 and U2, and the process of assembling the headlamp is simple.

  In particular, the extension reflector 34 needs to be arranged so as not to interfere with the light source units U1 and U2 in the lamp chamber S, but the front cover 20 and the lamp body 10 (the light source units U1 and U2 accommodated in the lamp body 10) Since the seal leg 21 on the front cover 20 side is engaged with the seal groove 11 on the lamp body 10 side (attached to the lamp body 10), the seal leg 21 is naturally positioned, so that the front cover 20 and the extension reflector 34 are provided. The positions of the boss 50 and the bottomed cylindrical portion 60 are determined in advance in consideration of the arrangement of the light source units U1 and U2 in the lamp chamber S (the extension reflector 34 disposed in the lamp chamber S via the front cover 20 is provided in the lamp chamber S). To the front cover 20 by setting it to a position that does not interfere with the light source units U1 and U2 of the inside. Mounting operation of the extension reflector 34 is simplified.

  In the above-described embodiment, the boss 50 on the front cover 20 side and the bottomed cylindrical portion 60 (boss engagement hole 62) on the extension reflector 34 side are fixed by a fastening screw (tapping screw) 70. The fixing between the cover 20 and the extension reflector 34 may be an uneven lance engagement or other mechanical fixing means.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of an automotive headlamp that is a first embodiment of the present invention. It is a top view of the headlamp. FIG. 3 is a horizontal sectional view of the same headlamp (a sectional view taken along line III-III shown in FIG. 1). It is a longitudinal cross-sectional view (cross-sectional view in alignment with line IV-IV shown in FIG. 1) of the headlamp. It is a figure which shows the aiming mechanism which carries out tilt adjustment of the light source unit for passing beam formation (sectional drawing in alignment with line VV shown in FIG. 1). It is a figure which shows the aiming mechanism which tilt-adjusts the light source unit for traveling beam formation (sectional drawing which follows the line VI-VI shown in FIG. 1). It is a front view of an extension reflector. It is a top view of an extension reflector. It is a left view of an extension reflector. It is a schematic diagram which expands and shows the boss | hub engagement hole on the front cover side and the extension reflector side. It is explanatory drawing explaining the effect | action by which the impact force which acted on the front cover is absorbed. It is a principal part perspective view of the conventional headlamp for motor vehicles.

Explanation of symbols

10 Lamp body 20 Front cover S Lamp chambers 31, 37 Bulbs 30, 36 as light sources Reflectors E1, E2 Aiming mechanisms 32a, 32b; 38a, 38b Aiming screw 32c constituting the aiming mechanism; 38c Ball joint 30A constituting the aiming mechanism 36A Reflector body 30a, 36a V-shaped grooves U1, U2 which are weak parts provided at the front edge of the reflector Light source unit 34 Extension reflector 34A Extension reflector body F Impact force 50 acting on the front cover 50 On the back side of the front cover Projected boss 60 Bottomed cylindrical part 62 which is a fixing part to the front cover 62 Boss engagement hole 66 recessed on the front side of the extension reflector A thin fragile part formed around the boss engagement hole An annular V-shaped groove 70 Ex Emissions Deployment reflector and fastening screw is a mechanical fastening means of the front cover (tapping screws)
131, 132, 133 (134, 135, 136) Aiming mechanism mounting bracket

Claims (4)

  A light source unit integrating a light source and a reflector is housed in a lamp chamber defined by a lamp body and a synthetic resin front cover, and a synthetic resin extension reflector surrounding the light source unit is disposed along the inside of the front cover. In addition, in the vehicular lamp in which at least a part of the front cover is thinly formed, the extension reflector is fixed to the front cover at a plurality of locations on the peripheral edge thereof, and the extension reflector A vehicular lamp characterized in that a thin fragile portion that is cut by an impact at the time of a collision that acts via the front cover is provided between an attachment fixing portion to the front cover and the extension reflector main body.   A boss is projected on the back side of the front cover, and a mounting fixing portion of the extension reflector with the front cover is provided on the front side of the extension reflector main body, and is a boss engagement hole with which the boss engages. The vehicular lamp according to claim 1, wherein the fragile portion is provided around the boss engagement hole in the extension reflector main body.   The said light source unit is comprised as a reflective light source unit provided with the substantially paraboloid-shaped reflector, The thin weak part was provided in the front edge part of the said reflector, The Claim 1 or 2 characterized by the above-mentioned. Vehicle lamps.   The reflector is supported by an aiming mechanism so as to be tiltable, and has a structure in which an aiming mechanism mounting bracket protrudes from the reflector body, and the bracket is provided with a thin fragile portion. The vehicle lamp according to any one of 1 to 3.

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