CN118049615A - Headlight for vehicle - Google Patents

Abstract

The invention provides a vehicle headlamp capable of inhibiting relative deviation of light distribution patterns of respective lights from a plurality of lamp units. A vehicle headlamp (1) is provided with: a first lamp unit (1A) that includes a fixing portion (126) as a first fixing portion; a second lamp unit (1B) that includes a fixing portion (606) as a second fixing portion that is fixed to the fixing portion (126); and a bracket (1C) for mounting the first lamp unit (1A).

Description

Headlight for vehicle

Technical Field

The present invention relates to a vehicle headlamp.

Background

There is known a vehicle headlamp including: a low beam lamp unit that emits light of a low beam light distribution pattern toward the front of a vehicle; and an auxiliary lamp unit that emits light of another light distribution pattern projected in the left-right direction to the vicinity of the light distribution pattern of the low beam. Patent document 1 discloses a vehicle headlamp as described above. In this vehicle headlamp, the low-beam lamp units and the auxiliary lamp units are separately and independently attached to the bracket. In this vehicle headlamp, a rectangular light distribution pattern composed of a light distribution pattern of a low beam and another light distribution pattern projected in the vicinity of the light distribution pattern of the low beam is projected to the front of the vehicle, and a traveling path in front of the vehicle is irradiated widely, thereby improving visibility.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication No. 2005-141919

Disclosure of Invention

Problems to be solved by the invention

In the vehicle headlamp of patent document 1, since the lamp units for low beam and the auxiliary lamp units are separately attached to the bracket, when the bracket is deformed, the lamp units may be relatively deviated due to the deformation of the bracket. As a result, the light distribution pattern of the light from each lamp unit may be relatively deviated.

Accordingly, an object of the present invention is to provide a vehicle headlamp capable of suppressing a relative deviation of a light distribution pattern of light from each of a plurality of lamp units.

Means for solving the problems

In order to achieve the above object, a vehicle headlamp according to the present invention includes: a first lamp unit that includes a first fixing portion and emits first light that is at least one of light of a light distribution pattern of a low beam and light of an additional light distribution pattern that is added to the light distribution pattern of the low beam to form a light distribution pattern of a high beam; a second lamp unit that includes a second fixing portion fixed to the first fixing portion and emits a second light having a different light distribution pattern from the first light; and a bracket for mounting the first lamp unit.

In this vehicle headlamp, since the second fixing portion is fixed to the first fixing portion, the second lamp unit is mounted to the first lamp unit, and the first lamp unit to which the second lamp unit is mounted to the bracket. Therefore, even if the bracket is deformed, the second lamp unit can be prevented from being deviated from the first lamp unit due to the deformation. Thus, the relative deviation of the light distribution patterns of the lights from the first lamp unit and the second lamp unit can be suppressed.

Further, the first lamp unit may include a first heat sink including a pair of heat sinks, one of the heat sinks including one of the substrates extending in a first predetermined direction, and the other of the heat sinks including: a second substrate disposed on one main surface of the first substrate; and the first fixing portion provided on the other substrate, wherein the second lamp unit includes a second heat sink including the second fixing portion, screw holes through which screws pass are provided in each of the first fixing portion and the second fixing portion, the second fixing portion is fixed to the first fixing portion by the screws that pass through the screw holes of the second fixing portion, and the first fixing portion is fixed to the one substrate by the screws that pass through the screw holes of each of the first fixing portion and the second fixing portion.

In this configuration, since the second fixing portion of the second radiator is fixed to the first fixing portion by the screw for fixing the first fixing portion of the other radiator to one radiator, the number of screws can be reduced as compared with the case where the first fixing portion and the second fixing portion are fixed by different screws. In order to facilitate heat dissipation from the heat sink, the first heat sink including the first fixing portion and the second heat sink including the second fixing portion are generally made of metal. Therefore, when the first fixing portion and the second fixing portion are fixed by the screw, the first fixing portion can be prevented from being deformed by the stress applied from the second fixing portion to the first fixing portion, as compared with the case where the first fixing portion and the second fixing portion are made of resin. This can suppress the second lamp unit from being deviated from the first lamp unit due to the deformation of the first fixing portion.

In this case, the first heat sink and the second heat sink may be connected via the first fixing portion and the second fixing portion.

According to this configuration, heat generated by the light emitted from each of the first lamp unit and the second lamp unit can be efficiently conducted between the first heat sink and the second heat sink, based on free electrons flowing back and forth between the first fixing portion and the second fixing portion.

In addition, the first lamp unit may include: a first lens unit that projects the first light to the front of a vehicle; and a first heat sink including a first substrate extending in a second predetermined direction and configured with a first lens unit including: a first projection lens; and a first holder including the first fixing portion and holding the first projection lens, the first holder being disposed on a front surface of the first substrate, the second lamp unit including: a second projection lens that projects the second light to the front of the vehicle; and a second holder that includes the second fixing portion and holds the second projection lens, wherein screw holes through which screws pass are provided in each of the first fixing portion and the second fixing portion, the second fixing portion is fixed to the first fixing portion by the screws that pass through the screw holes of the second fixing portion, and the first fixing portion is fixed to the first substrate by the screws that pass through the screw holes of each of the first fixing portion and the second fixing portion.

In this configuration, since the second fixing portion of the second holder is fixed to the first fixing portion by the screw fixing the first fixing portion of the first holder to the first substrate, the number of screws can be reduced as compared with the case where the first fixing portion and the second fixing portion are fixed by different screws. Further, since the second fixing portion is fixed to the first fixing portion, the second holder holding the second projection lens is prevented from being deviated from the first holder holding the first projection lens, and the relative deviation of the light distribution patterns of the light emitted from the first projection lens and the second projection lens can be prevented.

In this case, the first holder and the second holder may be made of metal, and may be in communication with each other via the first fixing portion and the second fixing portion.

According to this configuration, heat generated by the light emitted from each of the first lamp unit and the second lamp unit can be efficiently conducted between the first heat sink and the second heat sink, based on free electrons flowing back and forth between the first fixing portion and the second fixing portion.

Effects of the invention

As described above, according to the present invention, it is possible to provide a vehicle headlamp capable of suppressing relative deviation of light distribution patterns of respective lights from a plurality of lamp units.

Drawings

Fig. 1 is a schematic view of a vehicle headlamp according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of the first lamp unit as seen obliquely from the left side and front.

Fig. 3 is an exploded perspective view of the first lamp unit as seen from above.

Fig. 4 is a perspective view of the first lamp unit.

Fig. 5 is an exploded perspective view of the second lamp unit as seen obliquely from the left side and front.

Fig. 6 is an exploded perspective view of the second lamp unit as seen from above.

Fig. 7 is a diagram illustrating the mounting of the second lamp unit to the first lamp unit.

Fig. 8 is a rear view of the first lamp unit with the second lamp unit mounted.

Fig. 9 is a view illustrating the mounting of the first lamp unit mounted with the second lamp unit to the bracket.

Fig. 10 is a schematic view of a vehicle headlamp according to a modification.

Fig. 11 is a diagram illustrating the mounting of the second lamp unit to the first lamp unit in the modification.

Description of the reference numerals

1: A vehicle headlamp;

1A: a first lamp unit;

1B: a second lamp unit;

1C: a bracket;

126. 507: a first fixing portion;

606. 817: and a second fixing part.

Detailed Description

Hereinafter, an embodiment for implementing the vehicle headlamp according to the present invention will be described with reference to the drawings. The following exemplary embodiments are provided to facilitate understanding of the present invention, and are not provided to limit the present invention. The present invention can be modified and improved within a range not departing from the gist thereof. In the drawings referred to below, the dimensions of the respective members may be changed for easy understanding. In the drawings, for easy observation, the same components may be given reference numerals only in part and some reference numerals may be omitted.

Fig. 1 is a schematic perspective view of a vehicle headlamp according to the present embodiment. The vehicle headlamp 1 is a member that is generally provided in each of the left and right directions in front of the vehicle, and the left and right vehicle headlamps 1 are formed to be substantially symmetrical in the left and right directions. Therefore, in the present embodiment, the left vehicle headlamp 1 will be described. In the present specification, "right" refers to the right side in the forward direction of the vehicle, and "left" refers to the left side in the forward direction. The vehicle of the present embodiment is a motor vehicle.

The vehicle headlamp 1 includes: a first lamp unit 1A that emits first light; a second lamp unit 1B that emits a second light having a different light distribution pattern from the first light from the first lamp unit 1A; and a bracket 1C. The first light is at least one of light of a light distribution pattern of the low beam and light of an additional light distribution pattern that is added to the light distribution pattern of the low beam to form a light distribution pattern of the high beam. In this embodiment, the first light is described as light of the light distribution pattern of the low beam. The second light is light of a light distribution pattern projected in the vicinity of the light distribution pattern of the low beam. In the following description, this light distribution pattern is sometimes referred to as an enlarged light distribution pattern. A part of the enlarged light distribution pattern overlaps with the light distribution pattern of the low beam, and the other part does not overlap with the light distribution pattern of the low beam. In human vision, the enlarged light distribution pattern may not overlap with the light distribution pattern of the low beam but may contact with the light distribution pattern of the low beam. The enlarged light distribution pattern is located at the same height as or lower than the cutoff line of the low-beam light distribution pattern. The light distribution pattern is a shape of an image of light formed on a virtual vertical screen in front of, for example, 25m of the vehicle, and an intensity distribution of the light on the image.

The second lamp unit 1B is located near the left side of the first lamp unit 1A, and is mounted on the first lamp unit 1A. The first lamp unit 1A mounted with the second lamp unit 1B is mounted on the bracket 1C. The mounting of the second lamp unit 1B to the first lamp unit 1A and the mounting of the first lamp unit 1A to the bracket 1C will be described later. The first lamp unit 1A, the second lamp unit 1B, and the bracket 1C are housed in a case, not shown, and the first light and the second light pass through the front surface of the case.

Fig. 2 is an exploded perspective view of the first lamp unit 1A when viewed obliquely from the left side and front, fig. 3 is an exploded perspective view of the first lamp unit 1A when viewed from above, and fig. 4 is a perspective view of the first lamp unit 1A.

The first lamp unit 1A includes a first heat sink 100, a first light source unit 300, a mirror 400, and a first lens unit 500.

The first heat sink 100 includes a first substrate 101, which is a plate-like member extending in the substantially vertical direction, and a pair of heat sinks 111 and 121. Of the pair of heat sinks 111 and 121, the lower heat sink 111 as one heat sink is disposed on the rear surface of the first substrate 101, and the upper heat sink 121 as the other heat sink is disposed above the lower heat sink 111. The materials of the first substrate 101, the lower heat sink 111, and the upper heat sink 121 are metals such as aluminum.

The first substrate 101 is provided with an opening 103 penetrating the first substrate 101 in the front-rear direction, and the opening 103 is located on the optical path of the first light emitted from the first light source unit 300. The opening 103 has a rectangular shape with a long left and a long right. The first lens unit 500 is disposed on the front surface of the first substrate 101, and the lower heat sink 111 is disposed on the rear surface of the first substrate 101 on the opposite side of the first lens unit 500.

The lower heat sink 111 includes a lower substrate 113 as one substrate and a plurality of lower fins 114.

The lower substrate 113 is a plate-like member extending in a substantially horizontal direction. In this example, the horizontal direction is a first predetermined direction, and the vertical direction is a second predetermined direction. The lower substrate 113 is located at substantially the same position as the lower edge of the opening 103 of the first substrate 101 in the up-down direction. A plurality of lower fins 114 are provided on the lower surface of the lower main surface of the lower substrate 113. The lower substrate 113 and the lower heat sink 114 are in contact with the back surface of the first substrate 101.

The plurality of lower fins 114 are integrally formed with the lower substrate 113, and are juxtaposed at a distance from each other, and extend in the lower and front-rear directions. In fig. 2, 3, and 4, the leftmost lower fin 114 is illustrated, and other lower fins 114 are hidden by the leftmost lower fin 114 and the first substrate 101 and are not illustrated.

A substrate 301 described later of the first light source unit 300 is disposed on the upper surface of the upper main surface of the lower substrate 113. A pair of mounting bosses 116 spaced apart from each other in the left-right direction are provided on the upper surface of the lower substrate 113. When viewed from the opening 103 of the first substrate 101, the substrate 301 is arranged so as to overlap the opening 103, and the mounting bosses 116 are provided at the respective left and right sides of the opening 103 so as not to overlap the opening 103. As shown in fig. 4, when the first lamp unit 1A is assembled, a fixing portion 126 of the upper heat sink 121, which will be described later, is screwed by the screw 61 with a fixing portion 406 of the reflector 400 interposed between the mounting bosses 116.

The upper heat sink 121 includes an upper substrate 123 as the other substrate, a plurality of upper heat sinks 124, leg portions 125, and fixing portions 126.

The upper substrate 123 is a plate-like member that extends obliquely upward from the front toward the rear. Leg portions 125 extending downward are provided at both left and right ends of the upper substrate 123. In fig. 2,3, and 4, the right leg 125 is hidden by the upper fin 124 and is not shown. The leg 125 is integrated with the upper substrate 123, and a flat plate-shaped fixing portion 126 is connected to a side of the leg 125 opposite to the upper substrate 123. The left fixing portion 126 is integral with the left leg portion 125 and extends in a first predetermined direction, i.e., in the horizontal direction, from the leg portion 125 to the left, and the right fixing portion 126 is integral with the right leg portion 125 and extends in the horizontal direction from the leg portion 125 to the right. Screw holes 127 are provided in the fixing portions 126 at positions corresponding to the mounting bosses 116. As shown in fig. 4, when the first lamp unit 1A is assembled, the fixing portion 126 is disposed at the fixing portion 406 of the reflector 400, and the fixing portion 406 is disposed at the mounting boss 116.

A plurality of upper heat sinks 124 are provided on the upper surface of the upper main surface of the upper substrate 123. The plurality of upper heat sinks 124 are integrated with the upper substrate 123, and are juxtaposed at a distance from each other, and extend in the upper and front-rear directions. The upper substrate 123 and the upper heat sink 124 are in contact with the back surface of the first substrate 101. A substrate 305, which will be described later, of the first light source unit 300 is disposed on the lower surface of the main surface, which is the lower side of the lower substrate 113.

The first light source unit 300 includes: a substrate 301 disposed on the upper surface of the lower substrate 113; a first light source 303 mounted on the substrate 301; a substrate 305 disposed on the lower surface of the upper substrate 123; and a first light source 307 mounted on the substrate 305. In the substrate 305, the first light source 307 is mounted on the surface opposite to the upper substrate 123, and is therefore indicated by a broken line in fig. 2.

In the present embodiment, three examples of the first light sources 303 and 307 are shown, but at least one first light source 303 and 307 may be used. The three first light sources 303 and the three first light sources 307 are each arranged in the left-right direction. The first light source 303 emits the first light upward, and the first light source 307 emits the first light downward. The first light sources 303 and 307 are constituted by, for example, LEDs (LIGHT EMITTING diodes).

The mirror 400 is located between the lower substrate 113 and the upper substrate 123 in the up-down direction. The reflecting mirror 400 includes a concave reflecting surface 401 that independently covers the emitting surfaces of the first light source 303 and the first light source 307. In the present embodiment, the total of six first light sources 303 and 307 are provided, and therefore the total of six reflection surfaces 401 are provided. The reflection surface 401 reflects the light from the first light source 303 and the first light source 307 without transmitting the light. The reflection surface 401 has a basic shape of a rotationally elliptical curved surface, and the first light source 303 and the first light source 307 are disposed at or near the position of the first focal point of the elliptical curved surface. At least a part of the light emitted from each of the first light sources 303, 307 is reflected by the reflection surface 401 to the first lens unit 500 through the opening 103.

Plate-like fixing portions 406 are provided on the left and right side surfaces of the reflecting mirror 400. The material of the fixing portion 406 is a metal. The fixing portion 406 extends in a substantially horizontal direction, and a screw hole 407 is provided in a position of the fixing portion 406 corresponding to the mounting boss 116. As shown in fig. 4, when the first lamp unit 1A is assembled, the fixing portion 406 is disposed on the mounting boss 116, and the reflecting mirror 400 is separated from the upper surface of the lower substrate 113. Further, the fixing portion 126 is disposed in the fixing portion 406, and the upper substrate 123 and the leg portion 125 surround the left and right sides and the upper side of the mirror 400. In this state, the screw 61 is screwed to the mounting boss 116 through the screw hole 127 and the screw hole 407. Thereby, the upper heat sink 121 and the reflecting mirror 400 are fixed to the lower heat sink 111. In other words, the upper heat sink 121 and the reflecting mirror 400 are fastened together to the lower heat sink 111 by the screws 61. When the first lamp unit 1A is assembled, the upper heat sink 124, the upper substrate 123, the leg 125, the fixing portion 126, the fixing portion 406, the mounting boss 116, the lower substrate 113, the lower heat sink 114, and the first substrate 101 are electrically connected to each other. However, as will be described later, the second lamp unit 1B is fixed to the fixing portion 406.

The first lens unit 500 includes a first projection lens 501 that projects the first light to the front of the vehicle, and a first holder 503 that holds the first projection lens 501. The material of the first projection lens 501 is exemplified by a resin, and the material of the first holder 503 is exemplified by a metal.

The first projection lens 501 is a convex lens. In the present embodiment, the first projection lens 501 is disposed such that the rear focal point of the first projection lens 501 is located at or near the second focal point of the reflecting surface 401 of the reflecting mirror 400. In other words, the first lamp unit 1A is a PES (Projector Ellipsoid System: projection type headlamp system) lamp unit.

The first holder 503 is a cylindrical member extending in the front-rear direction. The first holder 503 and the opening of the first holder 503 have rectangular shapes with long left and long right. Protrusions 503a are provided on the upper and lower sides of the front face of the first holding frame 503. The protrusion 503a is located at the left and right center. Further, protrusions 503b are provided on both sides of the upper and lower protrusions 503a in the left-right direction. The first projection lens 501 is provided with a hole 501a into which the projection 503a engages. When the first lamp unit 1A is assembled, the projection 503a is engaged with the hole 501A independently, and the projection 503b abuts against the rear surface of the outer periphery of the first projection lens 501.

The first holder 503 includes a flat plate-like fixing portion 507. The fixing portion 507 stands on each of the upper surface and the lower surface of the outer periphery of the first holding frame 503. The material of the fixing portion 507 is a metal. In the present embodiment, four fixing portions 507 are shown, but at least one fixing portion 507 may be used. Two fixing portions 507 of four are located at both left and right ends on the upper surface. The remaining two fixing portions 507 are located at left and right ends on the lower face. Screw holes 509 are provided in the respective fixing portions 507, and screw holes 109 are provided in positions of the first substrate 101 corresponding to the screw holes 509. As shown in fig. 4, a screw 63 is inserted into the screw hole 509, and the screw 63 is screwed into the screw hole 109. Thereby, the first lens unit 500 is fixed to the front surface of the first substrate 101. At this time, the first holder 503 is in conduction with the first substrate 101.

Fig. 5 is an exploded perspective view of the second lamp unit 1B when viewed obliquely from the left side and front, and fig. 6 is an exploded perspective view of the second lamp unit 1B when viewed from above.

The second lamp unit 1B includes a second heat sink 600, a second light source unit 700, and a second lens unit 800.

The second heat sink 600 includes a second substrate 603, a plurality of second heat sinks 604, and a fixing portion 606. The material of the second substrate 603 and the second heat sink 604 is metal.

The second substrate 603 is a plate-like member extending substantially in the second predetermined direction, that is, in the vertical direction. The second substrate 603 is rectangular and vertically long, and is shorter than the first substrate 101 in the left-right direction.

The plurality of second heat sinks 604 are disposed on the back surface of the second substrate 603. The plurality of second heat sinks 604 are integrated with the second substrate 603, and are juxtaposed at a distance from each other, and extend in the front-rear direction.

The second heat sink 604 on the first lamp unit 1A side of the plurality of second heat sinks 604 is shorter than the other second heat sinks 604 in the front-rear direction. In the present embodiment, the short second heat sink 604 is shown as two second heat sinks 604, that is, a first second heat sink 604 from the right closest to the first lamp unit 1A and a second heat sink 604 from the right juxtaposed with the second heat sink 604. A flat plate-like fixing portion 606 is connected to the rear ends of the second fins 604.

The fixing portion 606 extends in a substantially horizontal direction and is also connected to the side surface of the third second fin 604 from the right. The material of the fixing portion 606 is exemplified by metal. The fixing portion 606 will be described in detail later, and the fixing portion 606 is disposed at the fixing portion 126 on the left side of the upper heat sink 121. In the present embodiment, the fixing portion 126 is sometimes referred to as a first fixing portion and the fixing portion 606 is sometimes referred to as a second fixing portion in the following description. Screw holes 607 are provided at positions of the fixing portions 606 corresponding to the mounting bosses 116.

The second light source unit 700 includes a substrate 701 and a second light source 703 mounted on the substrate 701.

The substrate 701 is disposed on the front surface of the second substrate 603 on the opposite side of the second heat sink 604 side. The second substrate 603 has a rectangular shape long up and down when viewed from the front.

In the present embodiment, the example has been shown in which there are two second light sources 703, but at least one second light source 703 may be used. The two second light sources 703 are arranged in the up-down direction, respectively. The second light source 703 emits second light toward the front. The second light source 703 is constituted by an LED, for example.

The second lens unit 800 includes: a second projection lens 801 that is a convex lens that projects second light to the front of the vehicle; and a second holder 803 holding the second projection lens 801. The material of the second projection lens 801 is exemplified by a resin, and the material of the second holder 803 is exemplified by a metal.

The second holder 803 is a cylindrical member extending in the front-rear direction. The outer shape of the second holder 803 and the opening of the second holder 803 are rectangular with a long upper and lower direction. A second projection lens 801 is disposed in front of the second holder 803.

A flat plate-like fixing portion 807 is provided on the upper and lower surfaces of the outer periphery of the second holder 803. Screw holes 809 are provided in the respective fixing portions 807, and screw holes 609 are provided in positions of the second substrate 603 corresponding to the screw holes 809. As shown in fig. 1, when the second lens unit 800 is assembled, the screw 65 penetrates the screw hole 809 and is screwed into the screw hole 609. Thereby, the second holder 803 is fixed to the front surface of the second substrate 603 so as to surround the substrate 701, and the second lens unit 800 is assembled. At this time, the second holder 803 is in conduction with the second substrate 603.

At least a part of the inner peripheral surface of the second holder 803 is provided with a reflecting surface by metal vapor deposition or the like. The reflection surface reflects at least a part of the second light from the second light source 703 toward the front. Therefore, the second holder 803 is also a mirror. At least a part of the second light emitted from the second light source 703 is reflected by the reflection surface to the second projection lens 801 through the opening of the second holder 803. The second light may directly travel to the second projection lens 801 instead of traveling to the reflection surface.

Next, the mounting of the second lamp unit 1B to the first lamp unit 1A will be described. Fig. 7 is a diagram illustrating the mounting of the second lamp unit 1B to the first lamp unit 1A.

In the first lamp unit 1A, the fixing portion 406 of the reflector 400 is disposed on the mounting boss 116, and the fixing portion 126 of the upper substrate 123 is disposed on the fixing portion 406. In the right fixing portion 126, the screw 61 penetrates the screw hole 127 of the right fixing portion 126 and the screw hole 407 of the right fixing portion 406, and the screw 61 is screwed to the right mounting boss 116.

The left fixing portion 126 is provided with a fixing portion 606 of the second lamp unit 1B. The screw 61 penetrates the screw hole 607 of the fixing portion 606, the screw hole 127 of the left fixing portion 126, and the screw hole 407 of the left fixing portion 406, and the screw 61 is screwed to the left mounting boss 116. Thereby, the fixing portion 606 as the second fixing portion is fixed to the fixing portion 126 as the first fixing portion, the fixing portion 126 is fixed to the fixing portion 406, the fixing portion 406 is fixed to the mounting boss 116, and as shown in fig. 1, the second lamp unit 1B is mounted to the first lamp unit 1A. When the second lamp unit 1B is mounted to the first lamp unit 1A, the second heat sink 600 is fastened to the upper heat sink 121 together with the screws 61 for fixing the upper heat sink 121 and the reflector 400 to the lower heat sink 111. When the second lamp unit 1B is mounted to the first lamp unit 1A, the fixing portion 126 and the fixing portion 606 are in communication with each other. Thereby, the upper heat sink 121, the fixing portion 406, the lower heat sink 111, the first substrate 101, the first holder 503, the second holder 803, and the second heat sink 600 are electrically connected to each other.

As shown in fig. 1, when the second lamp unit 1B is mounted to the first lamp unit 1A, the second holder 803 of the second lens unit 800 abuts against the left side surface of the first holder 503 of the first lens unit 500. In the front-rear direction, the front surface of the second holder 803 is located substantially at the same position as the front surface of the first holder 503, but the second holder 803 extends rearward of the first holder 503, and the second substrate 603 is located rearward of the first substrate 101.

Next, the mounting of the first lamp unit 1A to which the second lamp unit 1B is mounted to the bracket 1C will be described. Fig. 8 is a rear view of the first lamp unit 1A to which the second lamp unit 1B is attached, and fig. 9 is a view illustrating attachment of the first lamp unit 1A to which the second lamp unit 1B is attached to the bracket 1C.

In the first lamp unit 1A, mounting bosses 901 are provided on each of the lower side heat sink 114 and the upper side heat sink 124. In the present embodiment, an example is shown in which two mounting bosses 901 are provided on the lower side fin 114, and one mounting boss 901 is provided on the upper side fin 124. The number of mounting bosses 901 provided on each of the lower fins 114 and the upper fins 124 is not particularly limited, and the number of mounting bosses 901 may be provided on at least one of the lower fins 114 and the upper fins 124.

The mounting bosses 901 on the lower fins 114 are provided between the lower fins 114 and connected to the adjacent lower fins 114. The mounting boss 901 extends in the front-rear direction, and is provided so as not to protrude from the lower fin 114 in the front-rear direction.

The mounting bosses 901 on the upper side heat sink 124 side are provided between the upper side heat sinks 124 and connected to the upper surfaces of the upper side heat sinks 124 and the upper side substrate 123 adjacent thereto. The mounting boss 901 extends in the front-rear direction, and is provided so as not to protrude from the upper side fin 124 in the front-rear direction.

Screw holes 67 are provided in positions of the bracket 1C corresponding to the mounting bosses 901. A screw 69 penetrates each screw hole 67, and the screw 69 is independently screwed to the mounting boss 901. Thereby, as shown in fig. 1, the first lamp unit 1A mounted with the second lamp unit 1B is mounted to the bracket 1C. At this time, the lower substrate 113, the lower heat sink 114, the upper substrate 123, the upper heat sink 124, and the mounting boss 901 of the first lamp unit 1A are in contact with the bracket 1C. In addition, the second substrate 603 and the second heat sink 604 of the second lamp unit 1B are separated from the bracket 1C.

In the present embodiment, since the first lamp unit 1A to which the second lamp unit 1B is attached to the bracket 1C, even if the bracket 1C is deformed, the deviation of the deformed second lamp unit 1B from the first lamp unit 1A can be suppressed.

As described above, the vehicle headlamp 1 includes: a first lamp unit 1A including a fixing portion 126 as a first fixing portion; a second lamp unit 1B including a fixing portion 606 as a second fixing portion fixed to the fixing portion 126; and a bracket 1C to which the first lamp unit 1A is mounted.

In the vehicle headlamp 1, the second lamp unit 1B is fixed to the fixing portion 126 by the fixing portion 606, and the first lamp unit 1A to which the second lamp unit 1B is attached to the bracket 1C. Therefore, even if the bracket 1C is deformed, the second lamp unit 1B can be prevented from being deviated from the first lamp unit 1A by the deformation. Thus, the relative deviation of the light distribution patterns of the lights from the first lamp unit 1A and the second lamp unit 1B can be suppressed.

The fixing portion 606 is fixed to the fixing portion 126 by a screw 61 penetrating a screw hole 607 of the fixing portion 606, and the fixing portion 126 is fixed to the lower substrate 113 by a screw 61 penetrating the screw holes 127 and 607 of the fixing portion 126 and 606, respectively.

In this configuration, since the fixing portion 606 of the second heat sink 600 is fixed to the fixing portion 126 by the screw 61 that fixes the fixing portion 126 of the upper heat sink 121 to the lower heat sink 111, the number of screws 61 can be reduced as compared with the case where the fixing portion 126 and the fixing portion 606 are fixed by different screws. In order to facilitate heat dissipation from the heat sink, the first heat sink 100 including the fixing portion 126 and the second heat sink 600 including the fixing portion 606 are made of metal. Therefore, when the fixing portion 126 and the fixing portion 606 are fixed by the screw 61, the fixing portion 126 can be prevented from being deformed by the stress applied from the fixing portion 606 to the fixing portion 126, compared with the case where the fixing portion 126 and the fixing portion 606 are made of resin. This can suppress the second lamp unit 1B from being deviated from the first lamp unit 1A due to the deformation of the fixing portion 126. The fixing portion 606 may not be fixed to the fixing portion 126 by the screw 61, and the fixing portion 126 may not be fixed to the lower substrate 113 by the screw 61, as long as the second lamp unit 1B is attached to the first lamp unit 1A.

In addition, the first heat sink 100 and the second heat sink 600 are in communication with each other via the fixing portion 126 and the fixing portion 606.

According to this configuration, heat generated by the light emitted from each of the first lamp unit 1A and the second lamp unit 1B can be efficiently conducted between the first heat sink 100 and the second heat sink 600 based on free electrons flowing back and forth between the fixing portion 126 and the fixing portion 606. Thereby, heat generated when the first lamp unit 1A emits the first light can be conducted from the first heat sink 100 to the second heat sink 600, and the heat can be radiated from the second heat sink 600. In addition, heat generated when the second lamp unit 1B emits the second light can be conducted from the second heat sink 600 to the first heat sink 100 and radiated from the first heat sink 100. When the fixing portion 126 made of metal is electrically connected to the fixing portion 606, the fixing portion 606 may be soldered to the fixing portion 126. The fixing portion 126 and the fixing portion 606 may not be conductive with each other.

In addition, the second holder 803 of the second lens unit 800 abuts the left side surface of the first holder 503 of the first lens unit 500. Thereby, the second holder 803 can be restrained from rotating relative to the first holder 503.

In the present embodiment, the fixing portion 606 as the second fixing portion is fixed to the fixing portion 126 as the first fixing portion in the attachment of the second lamp unit 1B to the first lamp unit 1A. In the present embodiment, the second substrate 603 is fastened to the upper heat sink 121 by the screws 61 for fixing the upper heat sink 121 and the reflecting mirror 400 to the lower heat sink 111. However, the first fixing portion and the second fixing portion are not limited to the fixing portion 126 and the fixing portion 606, respectively, and the attachment of the second lamp unit 1B to the first lamp unit 1A is not necessarily limited to the simultaneous fastening using the screw 61. Therefore, the following description will explain the modified examples.

Fig. 10 is a schematic view of the vehicle headlamp 1 according to the present modification, and fig. 11 is a view for explaining the attachment of the second lamp unit 1B to the first lamp unit 1A according to the present modification. In the present modification, the configuration of the second holder 803, the first fixing portion, and the second fixing portion of the second lamp unit 1B are different from those of the embodiment.

The second holder 803 of the present modification includes a flat plate-shaped leg 815 and a flat plate-shaped fixing portion 817 as a second fixing portion. The leg 815 and the fixing portion 817 are provided at each of the upper and lower sides of the second holder 803. The material of the leg 815 and the fixing portion 817 may be metal.

The leg 815 extends in the front-rear direction and is coupled to the right end of the fixing portion 807 and the right end of the second holder 803. A fixing portion 817 is coupled to the front end of the leg 815. The fixing portion 817 is integrally formed with the leg portion 815 and extends rightward from the distal end. Screw holes 819 are provided in each fixing portion 817.

When the second lamp unit 1B is attached to the first lamp unit 1A, the upper fixing portion 817 is disposed at the upper left fixing portion 507 which is the first fixing portion in the present modification, and the lower fixing portion 817 is disposed at the lower left fixing portion 507 in the present modification. At this time, the screw 63 penetrates the screw hole 819 of the upper fixing portion 817 and the screw hole 509 of the upper left fixing portion 507, and is screwed into the upper left screw hole 109 of the first substrate 101. The other screw 63 penetrates the screw hole 819 of the lower fixing portion 817 and the screw hole 509 of the lower left fixing portion 507, and is screwed into the lower left screw hole 109 of the first substrate 101. Thereby, the second lamp unit 1B is mounted to the first lamp unit 1A. When the second lamp unit 1B is mounted to the first lamp unit 1A, the second holder 803 is fastened to the first holder 503 together by the screws 63 that fix the first holder 503 to the first substrate 101. When the second lamp unit 1B is mounted to the first lamp unit 1A, the fixing portion 507 and the fixing portion 817 are in communication with each other. Thereby, the upper heat sink 121, the fixing portion 406, the lower heat sink 111, the first substrate 101, the first holder 503, the second holder 803, and the second heat sink 600 are electrically connected to each other. In the present modification, the second holder 803 of the second lens unit 800 is also adjacent to the left side surface of the first holder 503 of the first lens unit 500.

As described above, the fixing portion 817 as the second fixing portion of the present modification is fixed to the fixing portion 507 as the first fixing portion by the screw 63 penetrating the screw hole 819 of the fixing portion 817, and the fixing portion 507 is fixed to the first substrate 101 by the screw 63 penetrating the screw holes 509 and 819 of the fixing portion 507 and the fixing portion 817, respectively.

In this configuration, since the fixing portion 817 of the second holder 803 is fixed to the fixing portion 507 by the screw 63 which fixes the fixing portion 507 of the first holder 503 to the first substrate 101, the number of screws 63 can be reduced as compared with the case where the fixing portion 507 and the fixing portion 817 are fixed by different screws. Further, since the fixing portion 817 is fixed to the fixing portion 507, the second holder 803 holding the second projection lens 801 can be prevented from being deviated from the first holder 503 holding the first projection lens 501, and thus the relative deviation of the light distribution patterns of the light emitted from the first projection lens 501 and the second projection lens 801 can be prevented.

Further, the first holder 503 and the second holder 803 are made of metal, and the second lamp unit 1B is attached to the first lamp unit 1A, and thus are electrically connected to each other via the fixing portion 507 and the fixing portion 817.

According to this configuration, heat generated by the light emitted from each of the first lamp unit 1A and the second lamp unit 1B can be efficiently conducted between the first holder 503 and the second holder 803 by the free electrons flowing back and forth between the fixing portion 507 and the fixing portion 817. Accordingly, heat generated when the first lamp unit 1A emits the first light can be conducted from the first holder 503 to the second heat sink 600 via the second holder 803, and the heat can be dissipated from the second holder 803 and the second heat sink 600. In addition, heat generated when the second lamp unit 1B emits the second light can be conducted from the second holder 803 to the first heat sink 100 via the first holder 503, and can be radiated from the first holder 503 and the first heat sink 100. When the fixing portion 507 and the fixing portion 817 made of metal are electrically connected, the fixing portion 817 may be soldered to the fixing portion 507. Further, the fixing portion 507 and the fixing portion 817 may not be electrically connected to each other.

The present invention has been described above by taking the above-described embodiments and modifications as examples, but the present invention is not limited to these embodiments and modifications.

In the case where the first lamp unit 1A emits both the light of the low beam light distribution pattern and the light of the additional light distribution pattern as the first light, the first lamp unit may be configured so that one of the first light source 303 and the first light source 307 emits the low beam light and the other of the first light source 303 and the first light source 307 emits the light of the additional light distribution pattern.

In the above embodiment, a heat transfer flow member such as a thermally conductive grease may be provided between the fixing portion 606, the fixing portion 126, the fixing portion 406, and the mounting boss 116. In each of the surfaces, fine irregularities may be formed on the surfaces facing each other. However, according to the vehicle headlamp 1, even if the irregularities are formed, the heat transfer flow member can fill the irregularities, and the heat transfer flow member can facilitate conduction of the members facing each other. In the present modification, a heat transfer flow member may be provided between the fixing portion 817 and the fixing portion 507.

In the above embodiment, a protrusion may be provided on the upper surface of the left fixing portion 126, and a recess into which the protrusion is fitted may be provided on the lower surface of the fixing portion 606. When the protrusion is fitted into the recess, the screw hole 127 of the fixing portion 126 overlaps the screw hole 607 of the fixing portion 606. Thereby, the insertion of the screw 61 into the fixing portion 606 and the fixing portion 126 is facilitated. In addition, the protrusion is fitted into the recess, so that the fixing portion 126 can be prevented from being deviated from the fixing portion 126. The fixing portion 126 may have a recess on its upper surface and a projection on its lower surface. Although the fixing portions 126 and 606 are described, the fixing portions 126 and 406 may be provided with protrusions and depressions as described above, and the fixing portions 817 and 507 in the modification.

In the above embodiment, the left fixing portion 406, the left fixing portion 126, and the fixing portion 606 are overlapped in this order, but the order of the overlapping is not particularly limited as long as these are fastened together. For example, the left fixing portion 406, the fixing portion 606, and the left fixing portion 126 may be overlapped in this order. In this case, among the right mounting boss 116, the right fixing portion 406, and the right fixing portion 126, a gap is provided between the right fixing portion 406 and the right fixing portion 126 in accordance with the thickness of the fixing portion 606 in the up-down direction. Therefore, a member for filling the gap may be provided. The member is, for example, a plate-like member, and screw holes through which screws 61 are inserted are provided in the member. By this means, the right fixing portion 406 and the right fixing portion 126 can be prevented from rattling.

In the present modification, the upper left fixing portion 507 and the upper fixing portion 817 are overlapped in this order, and the lower left fixing portion 507 and the lower fixing portion 817 are overlapped in this order, but the order of the overlapping is not particularly limited as long as these are fastened together. For example, the upper fixing portion 817 and the upper left fixing portion 507 may overlap with each other in this order, and the lower fixing portion 817 and the lower left fixing portion 507 may overlap with each other in this order. In this case, gaps are provided between the upper right fixing portion 507 and the first substrate 101, and between the lower right fixing portion 507 and the first substrate 101, in accordance with the thickness of the fixing portion 817 in the front-rear direction. Therefore, a member for filling the gap may be provided. The member is, for example, a plate-like member, and screw holes through which screws 63 are inserted are provided in the member. Based on this member, shake in the first holding frame 503 can be suppressed.

In the above embodiment, the materials of the first holder 503 and the second holder 803 may be resin. Four fixing portions 507 are shown, but three may be used. In this case, one of the three fixing portions 507 is located at the left and right centers of the upper surface, and the remaining two fixing portions 507 are located at the left and right ends of the lower surface as in the embodiment.

The reflecting mirror 400 may be disposed so as not to be separated from the lower substrate 113. The mounting boss 116 may not be provided, and the screw 61 may be screwed to the lower substrate 113 through the screw hole 127 and the screw hole 407.

The first lamp unit 1A may not be a PES type lamp unit.

The first predetermined direction is not limited to the horizontal direction, and the second predetermined direction is not limited to the vertical direction.

[ Industrial Applicability ]

According to the present invention, there is provided a vehicle headlamp capable of suppressing a relative deviation of a light distribution pattern of light from each of a plurality of lamp units, which is usable in the field of vehicle headlamps of automobiles and the like.

Claims (5)

1. A headlight for a vehicle is characterized in that,

The vehicle headlamp includes:

A first lamp unit that includes a first fixing portion and emits first light that is at least one of light of a light distribution pattern of a low beam and light of an additional light distribution pattern that is added to the light distribution pattern of the low beam to form a light distribution pattern of a high beam;

a second lamp unit that includes a second fixing portion fixed to the first fixing portion and emits a second light having a different light distribution pattern from the first light; and

And a bracket for mounting the first lamp unit.

2. The vehicle headlamp according to claim 1, wherein,

The first lamp unit is provided with a first heat sink including a pair of heat sinks,

One of the heat sinks includes one of the substrates extending in a first predetermined direction,

The radiator of the other party includes: a second substrate disposed on one main surface of the first substrate; and the first fixing part is arranged on the other substrate,

The second lamp unit is provided with a second radiator comprising the second fixing part,

Screw holes through which screws pass are respectively arranged on the first fixing part and the second fixing part,

The second fixing portion is fixed to the first fixing portion by the screw penetrating the screw hole of the second fixing portion,

The first fixing portion is fixed to the one substrate by the screw penetrating the screw hole of each of the first fixing portion and the second fixing portion.

3. The vehicle headlamp according to claim 2, wherein,

The first radiator and the second radiator are mutually communicated through the first fixing part and the second fixing part.

4. The vehicle headlamp according to claim 1, wherein,

The first lamp unit includes:

a first lens unit that projects the first light to the front of a vehicle; and

A first heat sink including a first substrate extending in a second predetermined direction and configured with a first lens unit,

The first lens unit includes: a first projection lens; and a first holder including the first fixing portion and holding the first projection lens, the first holder being disposed on a front surface of the first substrate,

The second lamp unit includes: a second projection lens that projects the second light to the front of the vehicle; and a second holder including the second fixing portion and holding the second projection lens,

Screw holes through which screws pass are respectively arranged on the first fixing part and the second fixing part,

The second fixing portion is fixed to the first fixing portion by the screw penetrating the screw hole of the second fixing portion,

The first fixing portion is fixed to the first substrate by the screw penetrating the screw hole of each of the first fixing portion and the second fixing portion.

5. The vehicle headlamp according to claim 4, wherein,

The first holder and the second holder are made of metal, and are in communication with each other via the first fixing portion and the second fixing portion.