CN110274209B

CN110274209B - Vehicle headlamp

Info

Publication number: CN110274209B
Application number: CN201910175303.XA
Authority: CN
Inventors: 河合宏树; 花田旭; 高田贤一; 末次麻希子
Original assignee: Koito Manufacturing Co Ltd
Current assignee: Koito Manufacturing Co Ltd
Priority date: 2018-03-15
Filing date: 2019-03-08
Publication date: 2021-09-14
Anticipated expiration: 2039-03-08
Also published as: CN209744276U; CN110274209A

Abstract

The invention aims to provide a vehicle headlamp capable of restraining the enlargement. A vehicle headlamp of the present invention includes: a first light-emitting element (55) that emits first light (L1) that is low beam light, with a normal line (N1) to the emission surface of the first light-emitting element directed obliquely downward toward the front; a second light-emitting element (63) which is disposed below the first light-emitting element, faces a normal line (N2) of the emission surface obliquely upward in the front direction, and emits second light (L2) that becomes high-beam light; a light shielding section (43) extending forward from between the first light emitting element and the second light emitting element; and a projection lens (20) which is disposed in front of the light shielding portion and directly transmits a part of the first light and a part of the second light, wherein a focal point (20f) of the projection lens is formed between the projection lens and a front end (43c) of the light shielding portion, and the second light-emitting element is disposed closer to the focal point of the projection lens than the first light-emitting element.

Description

Vehicle headlamp

Technical Field

The present invention relates to a vehicle headlamp.

Background

As a vehicle headlamp represented by an automobile headlamp, there is known a vehicle headlamp mounted with a low beam light source for illuminating a front at night and a high beam light source for illuminating a distance farther than the low beam. The light from the high beam light source includes light emitted upward from the low beam. In addition, there is known a vehicle headlamp in which the light source is provided in one lamp unit.

For example, patent document 1 listed below discloses a vehicle lamp including a first light source that emits light upward, a first reflector that is arranged to cover the first light source from above, a second light source that emits light downward, and a second reflector that is arranged to cover the second light source from below. In this vehicle lamp, light emitted from the first light source and reflected by the first reflector and light emitted from the second light source and reflected by the second reflector are irradiated through the projection lens disposed in front of the first light source and the second light source.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2014-229441

Disclosure of Invention

Problems to be solved by the invention

In the vehicle lamp disclosed in patent document 1, the light emitted from the first light source is emitted upward with respect to the optical axis of the projection lens. In order to allow the light emitted upward to enter the projection lens disposed in front of the first light source, the light emitted from the first light source needs to be reflected forward by the first reflector. Such a first reflector is provided to protrude largely forward to cover the first light source. The second reflector is also arranged to protrude largely forward. However, if the first reflector and the second reflector are increased in size, the vehicle lamp tends to be increased in size.

Accordingly, an object of the present invention is to provide a vehicle headlamp capable of suppressing an increase in size.

Means for solving the problems

In order to solve the above problem, a vehicle headlamp according to the present invention includes: a first light emitting element that emits first light having a low beam, with a normal line of an emission surface of the first light emitting element directed obliquely downward toward the front; a second light emitting element which is disposed below the first light emitting element, has a normal line of an emission surface directed obliquely upward in front, and emits second light that becomes high beam; a light shielding portion disposed between the first light emitting element and the second light emitting element in a vertical direction; and a projection lens disposed in front of the light shielding portion and directly transmitting a part of the first light and a part of the second light, wherein a focal point of the projection lens is located between the projection lens and a distal end of the light shielding portion, and the second light-emitting element is disposed closer to the focal point of the projection lens than the first light-emitting element.

In the vehicle headlamp, a part of the first light and a part of the second light directly pass through the projection lens. That is, a part of the first light and a part of the second light are incident on the projection lens without being reflected and pass through the projection lens. Since the first light emitting element and the second light emitting element are arranged such that a part of the first light and a part of the second light are directly incident on the projection lens, the vehicle headlamp does not need a large reflector as described in patent document 1. Therefore, the vehicle headlamp can be prevented from being enlarged.

In the vehicle headlamp, the second light emitting element is disposed closer to the focal point of the projection lens than the first light emitting element. That is, the second light-emitting element is disposed closer to the focal point of the projection lens than the first light-emitting element in at least one of the front-back direction and the vertical direction. Therefore, the light intensity of the second light beam, which becomes a high beam, can be more easily increased than the light intensity of the first light beam, which becomes a low beam, at the focal point of the projection lens. Therefore, in the vehicle headlamp, the maximum luminous intensity of the high beam that is transmitted through the projection lens and irradiated forward can be increased as compared with the maximum luminous intensity of the low beam. On the other hand, by disposing the first light-emitting element at a position farther from the focal point of the projection lens than the second light-emitting element, the irradiation range of the first light can be more easily expanded on the focal point plane of the projection lens than the irradiation range of the second light. Therefore, in the vehicle headlamp, the irradiation range of the low beam can be further expanded than the irradiation range of the high beam.

In addition, the second light emitting element is preferably arranged such that a normal line of an emission surface of the second light emitting element is closer to a vertical direction than a normal line of an emission surface of the first light emitting element in a position forward of the first light emitting element.

By disposing the second light-emitting element in a position forward of the first light-emitting element, the second light-emitting element can be easily brought closer to the focal point of the projection lens than the first light-emitting element. Here, when the angle formed by the normal line of the emission surface of the second light-emitting element and the vertical plane is about the same as the angle formed by the normal line of the emission surface of the first light-emitting element and the vertical plane, it is difficult for one of the first light and the second light to pass through the vicinity of the focal point of the projection lens. By arranging the second light emitting element such that the normal line of the emission surface of the second light emitting element is more vertical than the normal line of the emission surface of the first light emitting element, the first light emitting element and the second light emitting element can be arranged such that both the second light and the first light can pass through the vicinity of the focal point of the projection lens. Therefore, the light intensities of the low beam and the high beam of the vehicle headlamp can be improved.

Preferably, the other part of the first light is irradiated onto an upper surface of the light shielding portion, and the upper surface of the light shielding portion has a first reflecting surface that reflects the other part of the first light toward a focal point of the projection lens.

By reflecting the other part of the first light in this manner, the first light is condensed at the focal point of the projection lens, and the light intensity of the low beam can be further improved.

Preferably, the other part of the second light is irradiated to a lower surface of the light shielding portion, and the lower surface of the light shielding portion has a second reflecting surface that reflects the other part of the second light toward a focal point of the projection lens.

By reflecting the other part of the second light in this manner, the second light is condensed at the focal point of the projection lens, and the luminous intensity of the high beam can be further improved.

In addition, it is preferable that a plurality of the second light emitting elements are arranged in parallel in the left-right direction, and an average interval of the second light emitting elements arranged in a center portion in the left-right direction is smaller than an average interval of the second light emitting elements arranged in at least one end portion in the left-right direction.

By adjusting the average interval between the plurality of second light-emitting elements as described above, the maximum luminous intensity near the center of the high beam can be increased as compared with the case where the same number of second light-emitting elements are arranged at equal intervals.

Effects of the invention

As described above, according to the present invention, it is possible to provide a vehicle headlamp capable of suppressing an increase in size.

Drawings

Fig. 1 is a diagram illustrating a lamp including a light source unit according to the present embodiment.

Fig. 2 is a perspective view of the lamp unit and the support unit shown in fig. 1.

Fig. 3 is an exploded perspective view of the lamp unit shown in fig. 1 as viewed from the front.

Fig. 4 is an exploded perspective view of the lamp unit shown in fig. 1 as viewed from the rear.

Fig. 5 is a perspective view of the heat sink.

Fig. 6 is a schematic sectional view of the heat sink.

Fig. 7 is a front view of the first substrate, the second substrate, and the flexible printed circuit substrate.

Fig. 8 is a diagram showing a state where the first substrate is mounted on a heat sink.

Fig. 9 is a diagram showing a state in which the first substrate and the second substrate are mounted on the heat sink.

Fig. 10 is a view showing a state where the second substrate is mounted on the heat sink.

Fig. 11 is a schematic cross-sectional view through the flexible printed circuit board in fig. 9.

Fig. 12 is a perspective view of the light source unit.

Fig. 13 is a front view of the light source unit.

Fig. 14 is a schematic cross-sectional view of the light source unit.

Fig. 15 is a perspective view of the support plate as viewed from the front.

Fig. 16 is a perspective view of the support plate as viewed from the rear.

Fig. 17 is an enlarged view of a portion surrounded by a broken line XVII in fig. 14.

Fig. 18 is a view showing the second substrate in fig. 9 in a plan view.

Fig. 19 is a view showing a state where the second substrate is fixed to the heat sink.

Fig. 20 is a schematic sectional view of the lamp unit.

Fig. 21 is a view showing a light distribution pattern.

Description of the reference numerals

1: a vehicle headlamp; 3: a lamp unit; 20: a projection lens; 20 f: a focal point; 25: a lens holder; 30: a support plate; 40: a reflector unit; 43: a light shielding portion; 43 c: a front end of the light shielding portion; 50: a first substrate; 55: a first light emitting element; 60: a second substrate; 63: a second light emitting element; 70: a flexible printed circuit substrate; 80: a heat sink; 81: a fan; l1: a first light; n1: a normal to an exit surface of the first light emitting element; l2: a second light; n2: a normal to an exit surface of the second light emitting element.

Detailed Description

Hereinafter, a mode for implementing the vehicle headlamp according to the present invention will be described by way of example with reference to the accompanying drawings. The following embodiments are provided for the purpose of facilitating understanding of the present invention and are not intended to be limiting. The present invention can be modified and improved according to the following embodiments without departing from the scope of the present invention.

(first embodiment)

First, the configuration of the lamp of the present embodiment will be described.

Fig. 1 is a diagram illustrating a lamp including a light source unit according to the present embodiment. In the present embodiment, the lamp is a vehicle headlamp. Generally, vehicle headlamps are provided in the left and right directions in front of a vehicle, and the left and right headlamps are configured to be substantially symmetrical in the left and right directions. Therefore, in the present embodiment, one vehicle headlamp will be described.

As shown in fig. 1, a vehicle headlamp 1 of the present embodiment includes a housing 2, a lamp unit 3, and a support unit 4 as main components. Fig. 1 is a side view of the vehicle headlamp 1, and fig. 1 shows the housing 2 in a cross-sectional view for easy understanding.

Next, the case 2 will be explained.

The housing 2 includes a lamp housing 11, a front cover 12, and a rear cover 13 as main components. A front cover 12 having light permeability is fixed to the lamp housing 11 so as to close the opening of the lamp housing 11. An opening smaller than the opening in the front is formed in the rear of the lamp housing 11, and a rear cover 13 is fixed to the lamp housing 11 to close the opening.

A space formed by the lamp housing 11, the front cover 12 closing the front opening of the lamp housing 11, and the rear cover 13 closing the rear opening of the lamp housing 11 is defined as a lamp chamber R. The lamp unit 3 and the support unit 4 are housed in the lamp chamber R.

Next, the support unit 4 will be explained.

Fig. 2 is a perspective view of the lamp unit and the support unit shown in fig. 1. As shown in fig. 1 and 2, the support unit 4 includes a bracket 15, a first link arm 16a, and a second link arm 16b as main components. The bracket 15 is a frame-shaped body, and includes a base portion 15a extending in the left-right direction,

column portions

15b, 15c extending upward from both left and right end portions of the base portion 15a, respectively, and a support portion 15d extending in the left-right direction and connected to upper end portions of the two

column portions

15b, 15 c. The lamp unit 3 is disposed between the pedestal portion 15a and the support portion 15 d. The upper portion of the lamp unit 3 and the support portion 15d of the bracket 15 are connected by a first connecting arm 16a, and the lamp unit 3 is suspended from the support portion 15d of the bracket 15. The lower portion of the lamp unit 3 and the base portion 15a of the bracket 15 are coupled by a second connecting arm 16b, and the base portion 15a side of the second connecting arm 16b is coupled to a driving unit, not shown, attached to the base portion 15a via a gear, not shown, and the like. In this way, the lamp unit 3 is attached to the bracket 15 via the first connecting arm 16a and the second connecting arm 16 b. The lamp unit 3 is rotatable in the left-right direction and tiltable in the front-rear direction with respect to the bracket 15 by a drive unit, not shown, attached to the base portion 15 a. The bracket 15 is fixed to the housing 2 by a mechanism not shown.

Next, the lamp unit 3 will be explained.

Fig. 3 is an exploded perspective view of the lamp unit shown in fig. 1 as viewed from the front. Fig. 4 is an exploded perspective view of the lamp unit shown in fig. 1 as viewed from the rear. Fig. 3 and 4 also show the first connecting arm 16a and the second connecting arm 16b of the support unit 4. As shown in fig. 3 and 4, the lamp unit 3 of the present embodiment includes a projection lens 20, a lens holder 25, and a light source unit LU as main components.

Next, the light source unit LU will be explained.

As shown in fig. 3 and 4, the light source unit LU of the present embodiment includes, as main components, a support plate 30, a reflector unit 40, a first substrate 50, a second substrate 60, two flexible printed circuit boards 70, a heat sink 80, and a fan 81.

Next, the heat sink 80 will be explained.

Fig. 5 is a perspective view of the heat sink, and fig. 6 is a schematic sectional view of the heat sink. Fig. 6 also shows a fan 81. As shown in fig. 4 to 6, the heat sink 80 is formed of, for example, metal, and includes a first bottom plate 82, a second bottom plate 83, a peripheral wall portion 84, and a rectifying plate 85 as main components.

The first bottom plate 82 is a plate-like body extending obliquely upward in the front direction and rightward and leftward. In the present embodiment, the first mounting surface 86, the first rib 87, the boss 88, and the recess 89 are formed on the front surface 82f of the first base plate 82. The first mounting surface 86 is a surface on which at least a part of the first board 50 is mounted, and is an end surface of the base 90 that protrudes forward from the front surface 82f of the first base plate 82, and is substantially parallel to the front surface 82f of the first base plate 82. The term "substantially parallel" in the present specification includes a completely parallel state, and also includes a state in which one of the two is inclined by about 1 ° with respect to the other. Of the outer edges of the first mounting surface 86, an outer edge 86e located at the lower end extends in the left-right direction.

As shown in fig. 5, a first rib 87 is formed in a region below the front surface 82f of the first bottom plate 82, and the first rib 87 projects forward from the front surface 82 f. Therefore, the first rib 87 is inclined with respect to the normal line of the first mounting surface 86. The first rib 87 extends upward from below when the first mounting surface 86 is viewed in plan, and is inclined upward with respect to the first mounting surface 86. In the present embodiment, the first rib 87 has a circular cross section perpendicular to the longitudinal direction.

Two bosses 88 are formed above the first ribs 87, and the bosses 88 protrude forward from the front surface 82f of the first bottom plate 82, similarly to the first ribs 87. Therefore, the bosses 88 are inclined with respect to the normal line of the first mounting surface 86. Each boss 88 extends upward from below when the first mounting surface 86 is viewed in plan, and is inclined upward with respect to the first mounting surface 86. An abutment surface 88s substantially perpendicular to the first mounting surface 86 is formed on the outer peripheral surface of the boss 88 on the lower side. In addition, the substantially vertical state in this specification includes a completely vertical state, and also includes a state in which one is inclined by about 1 ° with respect to the other from the completely vertical state. In the present embodiment, the abutment surface 88s of each boss 88 is a plane extending in the left-right direction when the first mounting surface 86 is viewed in plan, and is not parallel to the vertical direction, which is the extending direction of the first rib 87 when the first mounting surface 86 is viewed in plan.

Concave portions 89 are formed on the right and left sides of the first mounting surface 86. The concave portion 89 is

The front surface 82f of the first base plate 82 is recessed on the side opposite to the first placement surface 86. In the present embodiment, the concave portion 89 is recessed in an arc shape in a vertical cross section as will be described later.

The second bottom plate 83 is a plate-like body extending obliquely downward and leftward and rightward in the front direction. The outer edge of the upper side of the second bottom plate 83 is connected to the outer edge of the lower side of the first bottom plate. In the present embodiment, the second mounting surface 91, the second rib 92, the rib reinforcing portion 93, the protrusion 94, and the two bosses 100 are formed on the front surface 83f of the second bottom plate 83. The second mounting surface 91 is a surface on which at least a part of the second substrate 60 is mounted, and is an end surface of the base 95 protruding forward from the front surface 83f of the second bottom plate 83, and is substantially parallel to the front surface 83f of the second bottom plate 83. Therefore, a normal line extending toward the second substrate 60 of the second mounting surface 91 intersects with a normal line extending toward the first substrate 50 of the first mounting surface 86, and an angle formed between the first mounting surface 86 and the second mounting surface 91 is less than 180 degrees. Therefore, the first mounting surface 86 and the second mounting surface 91 are not parallel to each other, and the angle formed by the first substrate 50 and the second substrate 60 is also smaller than 180 degrees. Further, since the first bottom plate 82 and the second bottom plate 83 are plate-shaped bodies, the back surface 82b of the first bottom plate 82 is inclined with respect to the back surface 83b of the second bottom plate 83, and the angle formed between the back surface 82b of the first bottom plate 82 and the back surface 83b of the second bottom plate 83 is larger than 180 degrees. Specifically, the back surface 82b of the first bottom plate 82 is inclined obliquely upward toward the front, and the back surface 83b of the second bottom plate 83 is inclined obliquely downward toward the front. Fig. 6 is a cross-sectional view perpendicular to the front surface 82f of the first base plate 82 and the front surface 83f of the second base plate 83. Since the first bottom plate 82 and the second bottom plate 83 are each a plate-like body as described above, fig. 6 is also a cross-sectional view perpendicular to the back surface 82b of the first bottom plate 82 and the back surface 83b of the second bottom plate 83. Further, an outer edge 91e of the outer edge of the second mounting surface 91, which is positioned at the upper end on the first mounting surface 86 side, is substantially parallel to an outer edge 86e of the outer edge of the first mounting surface 86, which is positioned at the lower end on the second mounting surface 91 side.

As shown in fig. 5, a second rib 92 is formed in a region below the front surface 83f of the second bottom plate 83, and the second rib 92 projects forward from the front surface 83f of the second bottom plate 83. Therefore, the second ribs 92 are inclined with respect to the normal line of the second mounting surface 91. The second rib 92 extends downward from above and is inclined downward with respect to the second mounting surface 91 when the second mounting surface 91 is viewed in plan. In the present embodiment, the second rib 92 has a circular cross section perpendicular to the longitudinal direction. The second rib 92 and the first rib 87 are substantially parallel to each other. The second mounting surface 91 is visible when viewed from the front, which is the front end side of the first rib 87 in the extending direction of the first rib 87. Further, the first mounting surface 86 can be visually recognized when viewed from the front, which is the front end side of the second rib 92 in the extending direction of the second rib 92.

A rib reinforcing portion 93 is formed on the lower side of the outer peripheral surface of the second rib 92, and the rib reinforcing portion 93 is connected to the front surface 83f of the second bottom plate 83. The rib reinforcing portion 93 prevents the second rib 92 from falling downward with respect to the second mounting surface 91. In addition, the strength of the second rib 92 is improved as compared with the case where the rib reinforcing portion 93 is not provided. In the present embodiment, the rib reinforcing portion 93 is provided so as not to contact the second substrate 60.

Projections 94 are formed on both sides of the second bottom plate 83 in the left-right direction. Each of the projections 94 projects from the front surface 83f of the second bottom plate 83 in the direction normal to the second placement surface 91. Contact surfaces 94s substantially perpendicular to the second mounting surface 91 are formed on the outer peripheral surfaces of the upper and lower sides of the respective projections 94. In the present embodiment, the contact surface 94s is a plane extending in the left-right direction when the second mounting surface 91 is viewed in plan, and the contact surface 94s is not parallel to the vertical direction, which is the extending direction of the second rib 92, when the second mounting surface 91 is viewed in plan. The second rib 92 projects further than the projection 94 in the normal direction of the second mounting surface 91.

Bosses 100 are formed on both sides of the second base plate 83 in the left-right direction, and the projection 94 is located between the bosses 100. Each boss 100 protrudes forward from the front surface 83f of the second bottom plate 83 substantially in parallel with the second rib 92. The tip of each boss 100 is a plane that is substantially vertical and substantially perpendicular to the protruding direction of the boss 100. The substantially vertical state in this specification includes a true vertical state and also includes a state inclined by about 1 ° from the true vertical state. At the tip end of each boss 100, a female thread 100a is formed along the boss 100 from the end surface.

A flow member recess 96 is formed in the first bottom plate 82 between the outer peripheral surface of the lower side of the base 90 and the front surface 83f of the second bottom plate 83 on the upper side of the base 95. The two surfaces are arranged from the first mounting surface 86 side toward the second mounting surface 91 side, and the angle formed by the two surfaces is less than 180 degrees. The flow member recess 96 is connected to the two faces. In the present embodiment, as shown in fig. 6, the flow member recess 96 has a substantially V-shaped vertical cross section. The vertical cross-sectional shape of the flow member recess 96 is not particularly limited, and may be, for example, U-shaped.

As shown in fig. 5, a protrusion 97 protruding forward is formed on the surface of the predetermined flow member recess 96. The projection 97 projects further than the first mounting surface 86 in the normal direction of the first mounting surface 86. An abutment surface 97s substantially perpendicular to the first mounting surface 86 is formed on the upper outer peripheral surface of the projection 97. The abutment surface 97s is located below the abutment surface 88s of the boss 88 formed on the first base plate 82. In the present embodiment, the flow member recess 96 is connected to the outer peripheral surface of the lower side of the base 90 and the front surface 83f of the second bottom plate 83 on the upper side of the base 95. Therefore, the protrusion 97 crosses the flow member recess 96 in the vertical direction. In the present embodiment, two protrusions 97 are formed, and the contact surface 97s is a plane extending in the left-right direction when the first mounting surface is viewed in plan, and the contact surface 97s is not parallel to the vertical direction, which is the extending direction of the first rib 87, when the first mounting surface 86 is viewed in plan.

The peripheral wall portion 84 is a cylindrical body extending in the front-rear direction. As shown in fig. 4, a part of the front end of the peripheral wall portion 84 is fixed to the back surface 82b of the first bottom plate 82 and the back surface 83b of the second bottom plate 83. The rear end of the peripheral wall portion 84 is an open end, and an opening 84H is formed. In the present embodiment, the peripheral wall portion 84 is constituted by a pair of side walls 84a, an upper wall 84b, and a lower wall 84 c. The pair of

side walls

84a, 84a are plate-like bodies extending in the front-rear direction and the up-down direction at a predetermined interval. The front outer edges of the pair of

side walls

84a, 84a are connected to the rear surface 82b of the first bottom plate 82 and the rear surface 83b of the second bottom plate 83 from the upper outer edge of the first bottom plate 82 to the lower outer edge of the second bottom plate 83. As shown in fig. 6, the upper wall 84b is a plate-like body that is positioned above the upper outer edge of the first bottom plate 82, connects the upper outer edges of the pair of side walls 84a, and extends in the front-rear direction and the left-right direction. The lower wall 84c is a plate-like body that is positioned below the lower outer edge of the second bottom plate 83, connects the lower outer edges of the pair of side walls 84a, and extends in the front-rear direction and the left-right direction.

The heat sink 80 is provided with a first air vent 98a defined by the inner surface of the upper wall 84b and the upper outer edge of the first bottom plate 82. The first vent 98a is disposed forward of the connection portion 99 between the first bottom plate 82 and the second bottom plate 83 and on the first bottom plate 82 side of the connection portion 99. The heat sink 80 is formed with a second air vent 98b defined by an inner surface of the lower wall 84c and an outer edge of the lower side of the second bottom plate 83. The second ventilation port 98b is disposed at a position forward of the connection portion 99 between the first bottom plate 82 and the second bottom plate 83 and on the second bottom plate 83 side of the connection portion 99. The first vent 98a and the second vent 98b communicate the internal space and the external space of the peripheral wall portion 84.

The rectifying plate 85 is a plate-like body disposed in the internal space of the peripheral wall portion 84 and extending from the front end side to the rear end side of the peripheral wall portion 84. As shown in fig. 4, in the present embodiment, the rectifying plate 85 extends in the front-rear direction and the up-down direction, the upper outer edge of the rectifying plate 85 is connected to the inner peripheral surface of the upper wall 84b of the peripheral wall portion 84, and the lower outer edge of the rectifying plate 85 is connected to the inner peripheral surface of the lower wall 84c of the peripheral wall portion 84. As shown in fig. 6, the front outer edge 85f of the rectifying plate 85 is connected to the back surface 82b of the first bottom plate 82 and the back surface 83b of the second bottom plate 83. The outer edge 85b of the rectifying plate 85 on the rear side is positioned on the front side of the opening 84H. In fig. 6, the outer edge 85f on the front side and the outer edge 85b on the rear side of the rectifying plate 85 are shown by broken lines. In the present embodiment, the heat sink 80 includes a plurality of flow rectification plates 85. The plurality of baffle plates 85 respectively cross the first vents 98a when viewed from the front in the opening direction of the first vents 98a, and cross the second vents 98b when viewed from the front in the opening direction of the second vents 98 b. Further, some of the plurality of baffle plates 85 have protrusions 85a extending forward from the second vent 98b and protruding toward the space outside the peripheral wall portion 84.

Next, the fan 81 will be explained.

As shown in fig. 6, the fan 81 is disposed rearward of the rectifying plate 85 in the internal space of the peripheral wall portion 84, and the outer periphery of the fan 81 is surrounded by the peripheral wall portion 84. The fan 81 is fixed to the heat sink 80 by screws 81a shown in fig. 4. In the present embodiment, the fan 81 sends air to the back surface 82b of the first bottom plate 82 and the back surface 83b of the second bottom plate 83. That is, the air flow direction between the

rear surfaces

82b and 83b and the fan 81 is from the rear to the front. The fan 81 is configured to be capable of switching the air blowing direction to the opposite direction. That is, the fan 81 can also send air to the opening 84H side by switching the air blowing direction to the opposite direction, instead of sending air to the back surface 82b of the first bottom plate 82 and the back surface 83b of the second bottom plate 83. As described above, the first vent 98a and the second vent 98b are located forward of the connection portion 99 of the first bottom plate 82 and the second bottom plate 83, respectively. Therefore, the first air vent 98a and the second air vent 98b are disposed on the opposite side of the connection portion 99 between the first bottom plate 82 and the second bottom plate 83 from the fan 81 side in the cross section perpendicular to the back surface 82b of the first bottom plate 82 and the back surface 83b of the second bottom plate 83.

Next, the first substrate 50, the second substrate 60, and the flexible printed circuit board 70 will be described.

Fig. 7 is a front view of the first substrate, the second substrate, and the flexible printed circuit substrate. In fig. 3 and 4, the flexible printed circuit board 70 is shown in a bent state, but in fig. 7, the flexible printed circuit board 70 is shown in a non-bent state, and a state in which the first substrate 50 and the second substrate 60 are spread on the same plane is shown.

The first substrate 50 is a plate-like body, and is made of, for example, metal. A through hole 51 penetrating in the plate thickness direction is formed in the first substrate 50. Two first contact surfaces 51s are formed on the inner peripheral surface of the first substrate 50 defining the through-hole 51, and the two first contact surfaces 51s are planes that face each other and are substantially parallel to each other in a range from one surface to the other surface of the first substrate 50. That is, the first contact surface 51s is a part of the inner peripheral surface of the first substrate 50 defining the through-hole 51. The first contact surface 51s is provided substantially perpendicular to the front surface and the back surface of the first substrate 50. The through-hole 51 is formed at a position corresponding to the first rib 87 in the first base plate 82 of the heat sink 80, and the distance between the two first contact surfaces 51s is set to be slightly larger than the outer diameter of the first rib 87. For example, the distance between the two first abutment surfaces 51s may be set to be about 0.05mm to 0.1mm larger than the outer diameter of the first rib 87.

In a plan view of the first substrate 50, a side surface on one side in a direction parallel to the first contact surface 51s is set as a second contact surface 52s substantially perpendicular to the first contact surface 51 s. In addition, when the first substrate 50 is viewed in plan, a positioning concave portion 53 whose outer edge is recessed toward the second contact surface 52s side is formed in the outer edge on the side opposite to the second contact surface 52s side. A third contact surface 53s is formed on a side surface of the first substrate 50 defining the positioning recess 53, and the third contact surface 53s is substantially perpendicular to the first contact surface 51s in a range from one surface of the first substrate 50 to the other surface. The positioning recess 53 is formed at a position corresponding to the boss 88 in the first base plate 82 of the heat sink 80, and two positioning recesses 53 are formed. The distance between the second contact surface 52s and the third contact surface 53s is set to be slightly smaller than the distance between the contact surface 88s of the boss 88 and the contact surface 97s of the protrusion 97 in the heat sink 80. For example, the distance between the second abutment surface 52s and the third abutment surface 53s may be set to be smaller than the distance between the abutment surface 88s of the boss 88 and the abutment surface 97s of the projection 97 by about 0.05mm to 0.1 mm. Further, the first substrate 50 is formed with a notch 54 extending from the outer edge of the second contact surface 52s side to a predetermined position on the opposite side of the second contact surface 52s side. In the present embodiment, two cutouts 54 are formed.

A first light-emitting element 55 and a thermistor 56 are mounted on one surface of the first substrate 50. In a top view

In the case of the first substrate 50, the first light-emitting element 55 is positioned on the second contact surface 52s side, and the thermistor 56 is positioned on the opposite side to the second contact surface 52s side. In the present embodiment, the center of gravity 50G of the first substrate 50 is located between the first light emitting element 55 and the thermistor 56.

The first light emitting element 55 emits the first light as a low beam. That is, the first light-emitting element 55 is a low-beam light-emitting element. The first light emitting element 55 is arranged such that a normal line of an emission surface from which the first light is emitted is directed obliquely downward in the forward direction. Further, a plurality of first light emitting elements 55 are provided in parallel in the left-right direction. In the present embodiment, seven first light emitting elements 55 are provided.

As the first light emitting element 55, for example, an LED is used. In the present embodiment, as described above, the plurality of first light-emitting elements 55 are arranged in parallel in the left-right direction. Thus, the first light emitting element 55 is provided as an LED array composed of a plurality of LEDs. The LED arrays are connected in series by a power supply circuit 57 formed on the first substrate 50. The thermistor 56 is connected to a thermistor circuit 58 formed on the first substrate 50. The first light-emitting element 55, the thermistor 56, the power supply circuit 57, and the thermistor circuit 58 are insulated from the first substrate 50 by an insulating layer, not shown, provided on the surface of the first substrate 50.

The second substrate 60 is a plate-like body, and is made of, for example, metal. A through hole 61 penetrating in the plate thickness direction is formed in the second substrate 60. Two first contact surfaces 61s are formed on the inner peripheral surface of the second substrate 60 defining the through-hole 51, and the two first contact surfaces 61s are planes that face each other and are substantially parallel to each other in a range from one surface of the second substrate 60 to the other surface. That is, the first contact surface 61s is a part of the inner peripheral surface of the second substrate 60 defining the through-hole 61. The first contact surface 61s is provided substantially perpendicular to the front surface and the back surface of the second substrate 60. The through-hole 61 is formed at a position corresponding to the second rib 92 in the second base plate 83 of the heat sink 80, and the distance between the two first contact surfaces 61s is set to be slightly larger than the outer diameter of the second rib 92. For example, the distance between the two first abutment surfaces 61s may be set to be about 0.05mm to 0.1mm larger than the outer diameter of the second rib 92.

When the second substrate 60 is viewed in plan, a positioning concave portion 62 that is concave in a direction substantially perpendicular to the first contact surface 61s is formed on the outer edge of the second substrate 60. Two second contact surfaces 62s are formed on the side surface of the second substrate 60 defining the positioning recess 62, and the two second contact surfaces 62s face each other in a range from one surface of the second substrate 60 to the other surface thereof and are substantially perpendicular to the first contact surface 61 s. The positioning recess 62 is formed at a position corresponding to the protrusion 94 of the second bottom plate 83 of the heat sink 80, and two positioning recesses 62 are formed in the second substrate 60. The distance between the two second abutment surfaces 62s in each positioning recess 62 is set to be slightly larger than the distance between the two abutment surfaces 94s in the protrusion 94. For example, the distance between the two second abutment surfaces 62s may be set to be about 0.05mm to 0.1mm larger than the distance between the two abutment surfaces 94s in the protrusion 94.

A second light-emitting element 63 and a connector 64 are mounted on one surface of the second substrate 60. In a plan view of the second substrate 60, the second light-emitting element 63 is located on one side in a direction parallel to the first contact surface 61s, and the connector 64 is located on the other side. In the present embodiment, the center of gravity 60G of the second substrate 60 is located between the second light emitting element 63 and the connector 64.

The second light emitting element 63 and the connector 64 are electrically connected by a power supply circuit 65 formed on the second substrate 60. The second light emitting element 63 is disposed below the first light emitting element 55 and emits the second light as the high beam. That is, the second light emitting element 63 of the present embodiment is a high beam light emitting element. The second light emitting element 63 is arranged such that the normal line of the emission surface from which the second light is emitted is directed obliquely upward in the forward direction. Further, a plurality of second light emitting elements 63 are provided in parallel in the left-right direction. In the present embodiment, the number of the second light emitting elements 63 is greater than the number of the first

light emitting elements

55, and 12 light emitting elements are provided. As will be described later, the second light-emitting element 63 is disposed closer to the focal point of the projection lens 20 than the first light-emitting element 55. Further, the average interval of the second light emitting elements 63 arranged in the center portion in the left-right direction is smaller than the average interval of the second light emitting elements 63 arranged in at least one end portion in the left-right direction. For example, when the plurality of second light-emitting elements 63 arranged in the left-right direction are trisected into three groups, i.e., a left end group, a center group, and a right end group, the average interval of the second light-emitting elements 63 in the center group is smaller than the average interval of the second light-emitting elements 63 in at least one of the left end group and the right end group. In the present embodiment, as shown in fig. 7, the average interval of the second light emitting elements 63 arranged in the center portion in the left-right direction is smaller than the average interval of the second light emitting elements 63 arranged in the right end portion when viewed from the front.

As such a second light emitting element 63, for example, an LED is used. In the present embodiment, as described above, the plurality of second light emitting elements 63 are provided in parallel in the left-right direction. Therefore, the second light emitting element 63 is provided as an LED array composed of a plurality of LEDs. In the present embodiment, the second light emitting element 63 is an LED array including a plurality of LEDs arranged in parallel in a direction perpendicular to the first contact surface 61s in a plan view of the second substrate 60. In this LED array, two adjacent LEDs are connected in parallel by the power supply circuit 65, and light can be emitted or not emitted in units of two LEDs connected in parallel.

The second substrate 60 is provided with a first power feeding wiring 66a, a second power feeding wiring 66b, a first thermistor wiring 67a, and a second thermistor wiring 67b, each of which has one end connected to the connector 64. In the present embodiment, the first thermistor wire 67a is located closer to the power feeding circuit 65 in a direction substantially perpendicular to the first contact surface 61s in a plan view of the second substrate 60. In a plan view of the second substrate 60, the first power feeding wiring 66a is located between the power feeding circuit 65 and the first thermistor wiring 67a in a direction substantially perpendicular to the first contact surface 61 s. The second thermistor wire 67b is located on the other side of the feeding circuit 65 in the direction substantially perpendicular to the first contact surface 61s in a plan view of the second substrate 60. The second power feeding wiring 66b is located between the power feeding circuit 65 and the second thermistor wiring 67b in a direction substantially perpendicular to the first contact surface 61s in a plan view of the second substrate 60. A not-shown wire harness is connected to the connector 64. The number of the connectors 64 is not particularly limited, and fig. 7 shows an example in which two connectors 64 are mounted in parallel in a direction substantially perpendicular to the first contact surface 61 s. The second light-emitting element 63, the power supply circuit 65, the first power supply wiring 66a, the second power supply wiring 66b, the first thermistor wiring 67a, and the second thermistor wiring 67b are insulated from the second substrate 60 by an insulating layer, not shown, provided on the surface of the second substrate 60.

In the present embodiment, the two flexible printed circuit boards 70 are configured to be substantially bilaterally symmetrical. Hereinafter, one will be described, and the description of the other will be appropriately omitted. The flexible printed circuit board 70 has flexibility, and is composed of, for example, an insulating sheet and a metal film provided on one surface of the insulating sheet. The flexible printed circuit board 70 of the present embodiment includes a substantially rectangular tape portion 73, a first connection portion 71 connected to one end of the tape portion 73 in the longitudinal direction, and a second connection portion 72 connected to the other end of the tape portion 73 in the longitudinal direction. The width of the belt portion 73 in the direction perpendicular to the longitudinal direction is set smaller than the width of the first connection portion 71 and the second connection portion 72 in the direction. In the present embodiment, the band portion 73 is formed with a slit 73s substantially parallel to the longitudinal direction of the band portion 73. With this slit 73s, the bending rigidity of the belt portion 73 is reduced as compared with the case where the slit 73s is not formed. In particular, the rigidity of the belt portion 73 in the direction perpendicular to the longitudinal direction is reduced. The widths of the first connection portion 71, the second connection portion 72, and the belt portion 73 are not particularly limited. For example, the width of the belt portion 73 may be set to be larger than the widths of the first connection portion 71 and the second connection portion 72. The width of the belt portion 73 may vary in the longitudinal direction of the belt portion 73. The band 73 may not have the slit 73 s.

The first connection portion 71 is provided with a first power supply terminal 74a and a first thermistor terminal 75a, and the second connection portion 72 is provided with a second power supply terminal 74b and a second thermistor terminal 75 b. Further, the flexible printed circuit board 70 is provided with a power feeding wiring 74c for electrically connecting the first power feeding terminal 74a and the second power feeding terminal 74b through the tape portion 73. Further, a thermistor wire 75c is formed to electrically connect the first thermistor terminal 75a and the second thermistor terminal 75b through the band 73 similarly to the power supply wire 74 c. The power feeding wire 74c passes through one side of the tape portion 73 in a direction perpendicular to the longitudinal direction with reference to the slit 73s of the tape portion 73. On the other hand, the thermistor wire 75c passes through the other side of the tape portion 73 in the direction perpendicular to the longitudinal direction with reference to the slit 73s of the tape portion 73. That is, the flexible printed circuit board 70 has two

wires

74c, 75c extending from the first connection portion 71 to the second connection portion 72, and a gap 73s is formed between the two

wires

74c, 75 c.

Each of the flexible printed circuit boards 70 connects the first substrate 50 and the second substrate 60, and electrically connects the circuit formed on the first substrate 50 and the circuit formed on the second substrate 60. Specifically, the first connection portions 71 of the flexible printed circuit boards 70 are bonded to the mounting surface of the first substrate 50 on which the first light-emitting elements 55 are mounted, for example, by solder. The second connection portions 72 of the flexible printed circuit boards 70 are bonded to the mounting surface of the second substrate 60 on which the second light-emitting elements 63 are mounted, for example, by solder. In this way, the respective flexible printed circuit substrates 70 are connected to the first substrate 50 and the second substrate 60. The longitudinal directions of the tape portions 73 in the respective flexible printed circuit boards 70 are set to be substantially parallel to each other. In the present embodiment, the first contact surface 51s of the first substrate 50 and the first contact surface 61s of the second substrate 60 are substantially parallel to each other in a state where the first substrate 50 and the second substrate 60 are disposed on the same plane. In addition, the first substrate 50 is positioned on the first light-emitting element 55 side at the second substrate 60 on the second light-emitting element 63 side.

The first connection portions 71 of the respective flexible printed circuit boards 70 are located at substantially the same positions in a direction parallel to the first contact surface 51s in a plan view of the first substrate 50. The second connection portions 72 of the flexible printed circuit boards 70 are located at substantially the same positions in a direction parallel to the first contact surface 61s when the second substrate 60 is viewed in plan. The center of gravity 50G of the first substrate 50 and the first light emitting element 55 are located between the first connection portions 71 of the flexible printed circuit board 70. The first connection portion 71 of each flexible printed circuit board 70 is located on the opposite side of the first light-emitting element 55 side with respect to the center of gravity 50G of the first substrate 50. The center of gravity 60G of the second substrate 60 and the second light emitting element 63 are located between the second connection portions 72 of the flexible printed circuit board 70. Further, the center of gravity 50G of the first substrate 50 and the first light-emitting element 55 may not be located between the first connection portions 71. Further, the center of gravity 60G of the second substrate 60 and the second light emitting element 63 may not be located between the second connection portions 72. When viewed from the side of the flexible printed circuit board 70 opposite to the first substrate 50 side, a part of the tape portion 73 of each flexible printed circuit board 70 overlaps the notch 54 of the first substrate 50. The width of the slit 54 is set larger than the width of the belt portion 73. In the same viewing angle, the tape portion 73 of each flexible printed circuit board 70 does not overlap the first substrate 50 from the outer edge of the second substrate 60 across which the tape portion 73 crosses to a predetermined position in the notch 54. The tape portion 73 of the flexible printed circuit board 70 of the present embodiment does not overlap the first substrate 50 from the outer edge of the second substrate 60 across which the tape portion 73 crosses to the outer edge on the opposite side of the second substrate 60 out of the outer edges defining the notch 54 of the first substrate 50. In addition, when the first substrate 50 is viewed from above,

the first light-emitting element 55 of the first substrate 50 is disposed closer to the second substrate 60 than the edge of the notch 54 on the side opposite to the second substrate. The first light-emitting element 55 overlaps a portion of the band portion 73 that does not overlap the first substrate 50 in the manner described above, in a direction perpendicular to the longitudinal direction of the band portion 73.

Further, a cathode-side end 57c of the feeding circuit 57 formed on the first substrate 50 is connected to the first feeding terminal 74a of the one flexible printed circuit substrate 70. The anode-side end 57a of the feeding circuit 57 of the first substrate 50 is connected to the first feeding terminal 74a of the other flexible printed circuit board 70. Further, one end 58c on the cathode side of the thermistor circuit 58 formed on the first substrate 50 is connected to the first thermistor terminal 75a of the one flexible printed circuit board 70. One end 58a on the anode side of the thermistor circuit 58 formed on the first substrate 50 is connected to the first thermistor terminal 75a of the other flexible printed circuit board 70.

One end of the first power feeding wiring 66a of the second substrate 60 on the side opposite to the connector 64 is connected to the second power feeding terminal 74b of one of the flexible printed circuit boards 70. One end of the second power feeding wiring 66b of the second substrate 60 on the side opposite to the connector 64 is connected to the second power feeding terminal 74b of the other flexible printed circuit board 70. Further, one end of the first thermistor wire 67a on the side opposite to the connector 64 side of the second substrate 60 is connected to the second thermistor terminal 75b of one of the flexible printed circuit boards 70. One end of the second thermistor wire 67b of the second substrate 60 on the side opposite to the connector 64 is connected to the second thermistor terminal 75b of the other flexible printed circuit board 70.

By connecting the two flexible printed circuit boards 70 to the first substrate 50 and the second substrate 60 in this manner, the connector 64 of the second substrate 60 and the feeder circuit 65 of the first substrate 50 are electrically connected. Further, power is supplied to the first light emitting element 55 of the first substrate 50 via the connector 64. The connector 64 of the second substrate 60 is electrically connected to the thermistor circuit 58 of the first substrate 50, and a current is applied to the thermistor 56 of the first substrate 50.

Next, mounting of the first substrate 50 on the heat sink 80 will be described.

Fig. 8 is a diagram showing a state where the first substrate is mounted on a heat sink. As shown in fig. 8, the first substrate 50 is placed on the first placement surface 86 of the first base plate 82 of the heat sink 80 in a state where the first contact surface 51s is substantially parallel to the vertical direction and the first light-emitting element 55 side is positioned downward. When the first substrate is viewed in plan, the outer edge of the first mounting surface 86 is surrounded by the outer edge of the first substrate 50. In the present embodiment, since the grease as a flow member to be described later is applied to the surface of the first substrate 50 opposite to the side on which the first light-emitting element 55 is mounted, the grease is sandwiched between the surface of the first substrate 50 opposite to the side on which the first light-emitting element 55 is mounted and the first mounting surface 86. The first rib 87 of the first base plate 82 is inserted into the through hole 51 of the first base plate 50. As described above, since the first ribs 87 are inclined upward with respect to the first mounting surface 86 and extend upward from below when the first mounting surface 86 is viewed in plan, the first ribs 87 are inserted in a state inclined upward with respect to the opening direction of the through-hole 51. The center of the first rib 87 inserted into the through-hole 51 in this way is located between the two first abutment surfaces 51s when viewed from the front as the extending direction of the first rib 87. As described above, the distance between the two first abutment surfaces 51s is set to be slightly larger than the outer diameter of the first rib 87. Therefore, when the first substrate 50 moves along the first placement surface 86 in the direction perpendicular to the first contact surfaces 51s with respect to the heat sink 80, the outer peripheral surface of the first rib 87 contacts one of the two first contact surfaces 51 s. Here, as described above, when the first mounting surface 86 is viewed in a plan view, the first rib 87 extends upward from below, and the first contact surface 51s is substantially parallel to the vertical direction. Therefore, it can be understood that at least one of the outer peripheral surface on one side and the outer peripheral surface on the other side of the first rib 87 in the left-right direction, which is a direction perpendicular to the extending direction of the first rib 87 in a plan view of the first mounting surface 86, abuts against the first abutment surface 51 s. Therefore, the position of the first substrate 50 relative to the heat sink 80 in the direction parallel to the first mounting surface 86, in the direction perpendicular to the extending direction of the first ribs 87 when the first mounting surface 86 is viewed in plan, is limited to a predetermined range. In addition, at least one of the outer peripheral surface of one side and the outer peripheral surface of the other side of the first rib 87 in the direction perpendicular to the extending direction of the first rib 87 in a plan view of the first mounting surface 86 may always abut against the first abutment surface 51 s. For example, the first rib 87 may be pressed into the through-hole 51.

The two bosses 88 of the first base plate 82 enter the two positioning recesses 53 of the first base plate 50, respectively. As described above, the abutment surface 88s of the boss 88 is a flat surface perpendicular to the first mounting surface 86 and extending in the left-right direction when the first mounting surface 86 is viewed in plan. The third contact surface 53s on the side surface of the first substrate 50 defining the positioning recess 53 is set to be substantially perpendicular to the first contact surface 51s substantially parallel to the vertical direction. Therefore, the contact surface 88s and the third contact surface 53s face each other in a substantially parallel state.

The second contact surface 52s of the first substrate 50 is located above the protrusion 97 of the heat sink 80. As described above, the contact surface 97s of the projection 97 is a flat surface that is substantially perpendicular to the first mounting surface 86 and extends in the left-right direction when the first mounting surface 86 is viewed in plan. The second contact surface 52s of the first substrate 50 is substantially perpendicular to the first contact surface 51s substantially parallel to the vertical direction. Therefore, the contact surface 97s and the second contact surface 52s face each other in a substantially parallel state. As described above, the distance between the second abutment surface 52s and the third abutment surface 53s in the first substrate 50 is set to be slightly smaller than the distance between the abutment surface 88s of the boss 88 and the abutment surface 97s of the protrusion 97 in the heat sink 80. Therefore, when the first substrate 50 moves along the first placement surface 86 in a direction parallel to the first contact surface 51s with respect to the heat sink 80, the second contact surface 52s of the first substrate 50 contacts the contact surface 97s of the protrusion 97. Further, the third abutment surface 53s of the first substrate 50 abuts against the abutment surface 88s of the boss 88. Here, as described above, in a plan view of the first placement surface 86, the contact surface 88s is a flat surface extending in the left-right direction, and the contact surface 88s and the third contact surface 53s face each other in a substantially parallel state. Therefore, when the first placement surface 86 is viewed in plan, a tangent line at which the contact surface 88s and the third contact surface 53s contact extends substantially in the left-right direction. Therefore, the tangent line is substantially perpendicular to and not parallel to the extending direction of the first rib 87. As described above, in the case of the first mounting surface 86 as viewed in plan, the contact surface 97s is a flat surface extending in the left-right direction, and the contact surface 97s and the second contact surface 52s face each other in a substantially parallel state. Therefore, when the first placement surface 86 is viewed in plan, a tangent line at the time when the contact surface 97s and the second contact surface 52s contact each other extends substantially in the left-right direction. Therefore, the tangent line is substantially perpendicular to and not parallel to the extending direction of the first rib 87. Therefore, the position of the first substrate 50 relative to the heat sink 80 in the direction parallel to the first mounting surface 86 is limited to a predetermined range in the vertical direction, which is the extending direction of the first rib 87 when the first mounting surface 86 is viewed in plan. In at least one of the contact surface 88s and the third contact surface 53s and the contact surface 97s and the second contact surface 52s, the first rib 87 does not contact the first substrate 50 in the extending direction of the first rib 87 when the first placement surface 86 is viewed in plan. The second contact surface 52s of the first substrate 50 and the contact surface 97s of the projection 97 may always be in contact with each other, and the third contact surface 53s of the first substrate 50 and the contact surface 88s of the boss 88 may always be in contact with each other.

Further, since the first bottom plate 82 extends obliquely upward in the forward direction as described above, the first mounting surface 86 also extends obliquely upward in the forward direction, and the first substrate 50 mounted on the first mounting surface 86 also extends obliquely upward in the forward direction. As shown in fig. 8, when viewed from the front in the opening direction of the first vent 98a, a part of the first substrate 50 overlaps the first vent 98 a. As described above, the first substrate 50 is placed on the first placement surface 86 of the heat sink 80 in a state where the first contact surface 51s is substantially parallel to the vertical direction. The first light emitting element 55 is an LED array including a plurality of LEDs arranged in parallel in a direction substantially perpendicular to the first contact surface 51 s. Therefore, the LED arrays as the first light emitting elements 55 are arranged in the left-right direction.

Next, mounting of the second substrate 60 on the heat sink 80 will be described.

Fig. 9 is a diagram showing a state in which the first substrate and the second substrate are mounted on the heat sink. As shown in fig. 9, the second substrate 60 is placed on the second placement surface 91 of the second base plate 83 of the heat sink 80 in a state where the first contact surface 61s is substantially parallel to the vertical direction and the second light-emitting element 63 side is positioned on the upper side. When the second substrate 60 is viewed in plan, the outer edge of the second mounting surface 91 is surrounded by the outer edge of the second substrate 60. Furthermore, in

In fig. 9, the first substrate 50 side of the second substrate 60 and the second substrate 60 side of the first substrate 50 overlap, but the second substrate 60 and the first substrate 50 are separated. That is, the first substrate 50 and the second substrate 60 are mounted on the heat sink 80 with a predetermined gap therebetween.

In the present embodiment, since the grease as a flow member to be described later is applied to the surface of the second substrate 60 opposite to the side on which the second light-emitting element 63 is mounted, similarly to the first substrate 50, the grease is sandwiched between the surface of the second substrate 60 opposite to the side on which the second light-emitting element 63 is mounted and the second mounting surface 91. The second rib 92 of the second base plate 83 is inserted into the through hole 61 of the second base plate 60. As described above, since the second rib 92 is inclined downward with respect to the second mounting surface 91 and extends downward from above when the second mounting surface 91 is viewed in plan, the second rib 92 is inserted in a state inclined downward with respect to the opening direction of the through-hole 61. The center of the second rib 92 inserted into the through-hole 61 in this way is located between the two first abutment surfaces 61s when viewed from the front as the extending direction of the second rib 92. As described above, the distance between the two first abutment surfaces 61s is set to be slightly larger than the outer diameter of the second rib 92. Therefore, when the second substrate 60 moves along the second placement surface 91 in the direction perpendicular to the first contact surfaces 61s with respect to the heat sink 80, the outer peripheral surface of the second rib 92 contacts one of the two first contact surfaces 61 s. Here, as described above, when the second mounting surface 91 is viewed in plan, the second rib 92 extends downward from above, and the first contact surface 61s is set substantially parallel to the vertical direction. Therefore, it can be understood that at least one of the outer peripheral surface on one side and the outer peripheral surface on the other side of the second rib 92 in the lateral direction, which is the direction perpendicular to the extending direction of the second rib 92 when the second mounting surface 91 is viewed in plan, abuts against the first abutment surface 61 s. Therefore, the position of the second substrate 60 relative to the heat sink 80 in the direction parallel to the second mounting surface 91, in the direction perpendicular to the extending direction of the second ribs 92 when the second mounting surface 91 is viewed in plan, is limited to a predetermined range. In addition, at least one of the outer peripheral surface of one side and the outer peripheral surface of the other side of the second rib 92 in the direction perpendicular to the extending direction of the second rib 92 in a plan view of the second mounting surface 91 may always abut against the first abutment surface 61 s. For example, the second rib 92 may be press-fitted into the through hole 61.

The two protrusions 94 of the second base plate 83 enter the two positioning recesses 62 of the second substrate 60, respectively. As described above, the abutment surfaces 94s formed on the outer peripheral surfaces of the upper and lower sides of the projection 94 are respectively formed as planes that are substantially perpendicular to the second mounting surface 91 and extend in the left-right direction when the second mounting surface 91 is viewed in plan. Two second contact surfaces 62s facing the side surfaces of the second substrate 60 defining the positioning recess 62 are set to be substantially perpendicular to the first contact surface 61s substantially parallel to the vertical direction. Therefore, the contact surface 94s and the second contact surface 62s are opposed to each other in a substantially parallel state. As described above, the distance between the two second abutment surfaces 62s in each positioning concave portion 62 is set to be slightly larger than the distance between the two abutment surfaces 94s in the protrusion 94. Therefore, when the second substrate 60 moves along the second placement surface 91 along the first contact surface 61s with respect to the heat sink 80 in a direction parallel to the first contact surface 61s, the first contact surface 61s and one of the contact surfaces 94s that face each other abut against each other. Here, as described above, the contact surface 94s is a flat surface extending in the left-right direction when the second placement surface 91 is viewed in plan, and the contact surface 94s and the second contact surface 62s face each other in a substantially parallel state. Therefore, when the second placement surface 91 is viewed in plan, a tangent line at which the contact surface 94s and the second contact surface 62s contact each other extends substantially in the left-right direction. Therefore, the tangent line is substantially perpendicular to and not parallel to the extending direction of the second rib 92. Therefore, the position of the second substrate 60 in the direction parallel to the second mounting surface 91 with respect to the heat sink 80, in the direction parallel to the first contact surface 61s, is limited to a predetermined range. In a state where the contact surface 94s and the second contact surface 62s are in contact with each other, the second rib 92 does not contact the second board 60 in the extending direction of the second rib 92 when the second mounting surface 91 is viewed in plan. The second contact surface 62s of the second substrate 60 and the contact surface 94s of the projection 94 may always be in contact with each other. For example, the protrusion 94 may be pressed into the positioning recess 62.

Further, since the second bottom plate 83 extends obliquely forward and downward as described above, the second mounting surface 91 also extends obliquely forward and downward, and the second substrate 60 mounted on the second mounting surface 91 also extends obliquely forward and downward. As shown in fig. 9, the second substrate 60 overlaps the second vent 98b when viewed from the front in the opening direction of the second vent 98 b. As described above, the second substrate 60 is placed on the second placement surface 91 of the heat sink 80 in a state where the first contact surface 61s is substantially parallel to the vertical direction. The second light emitting element 63 is provided as an LED array arranged in a direction substantially perpendicular to the first contact surface 61 s. Therefore, the LED arrays as the second light emitting elements 63 are arranged in the left-right direction. In addition, as described above, since the first light-emitting element 55 side of the first substrate 50 is positioned on the second light-emitting element 63 side of the second substrate 60, the second light-emitting element 63 is positioned on the first substrate 50 side of the second substrate 60 with respect to the second substrate 60 side. The first light-emitting element 55 is located on the second substrate 60 side of the first substrate 50 with respect to the first substrate 50 side.

When viewed from the side of the flexible printed circuit board 70 opposite to the heat sink 80 side, the tape portions 73 of the two flexible printed circuit boards 70 do not overlap with the first substrate 50 from the outer edge of the second substrate 60 across which the tape portions 73 cross to a predetermined position in the notch 54. In addition, in the same viewing angle, the first light-emitting element 55 of the first substrate 50 overlaps the portion of the band portion 73 that does not overlap the first substrate 50 in the direction perpendicular to the longitudinal direction of the band portion 73. In addition, in the same view angle, the concave portion 89 on one side of the heat sink 80 crosses the edges on both sides of the flexible printed circuit board 70 in the direction perpendicular to the longitudinal direction of the flexible printed circuit board 70 on one side. The other concave portion 89 crosses edges on both sides of the other flexible printed circuit board 70 in a direction perpendicular to the longitudinal direction of the other flexible printed circuit board 70.

Fig. 10 is a view showing a state where the second substrate is mounted on the heat sink, and is a partially enlarged view of the second substrate and the heat sink as viewed from the side. As described above, some of the plurality of baffle plates 85 have the protruding portions 85a that extend forward from the second vent ports 98b and protrude toward the space outside the peripheral wall portion 84. As shown in fig. 10, the protruding portion 85a is in contact with a surface of the second substrate 60 opposite to the side on which the second light-emitting element 63 is mounted. That is, the second substrate 60 is placed on the second placement surface 91 of the second base plate 83 and also on the protruding portion 85 a.

Next, a description will be given of a state of the flexible printed circuit board 70 in a state where the first substrate 50 and the second substrate 60 are mounted on the heat sink 80.

In the present embodiment, the two flexible printed circuit boards 70 are substantially in the same state in a state where the first substrate 50 and the second substrate 60 are mounted on the heat sink 80. Therefore, one will be described below, and the description of the other will be omitted. Fig. 11 is a schematic cross-sectional view through the flexible printed circuit board in fig. 9, and is a schematic cross-sectional view parallel to the longitudinal direction of the tape portion 73 of the flexible printed circuit board 70. As described above, the first connection portion 71 is joined to the mounting surface 50s of the first substrate 50 on which the first light-emitting element 55 is mounted, and the second connection portion 72 is joined to the mounting surface 60s of the second substrate 60 on which the second light-emitting element 63 is mounted. Therefore, the first connection portion 71 is connected to the side opposite to the first mounting surface 86 of the first substrate 50, and the second connection portion 72 is connected to the side opposite to the second mounting surface 91 of the second substrate 60. As shown in fig. 11, the tape portion 73 of the flexible printed circuit board 70 is bent in a convex shape toward the heat sink 80 at a position closer to the first substrate 50 side than the first connection portion 71 between the first substrate 50 and the second substrate 60. In the present embodiment, the tape portion 73 of the flexible printed circuit board 70 passes through the first mounting surface 86 side region with respect to the first connection portion 71 and passes through the notch 54 of the first substrate 50. The concave portion 89 of the heat sink 80 is recessed in an arc shape in a vertical cross section and is recessed toward the opposite side of the first mounting surface 86 to the flexible printed circuit board 70 side. The band portion 73 of the flexible printed circuit board 70 also passes through the concave portion 89. The flexible printed circuit board 70 thus bent does not contact the heat sink 80. Further, for example, due to dimensional errors of the first substrate 50, the second substrate 60, the heat sink 80, and the like, the first substrate 50 and the second substrate 60 may be displaced in the left-right direction, which is a direction perpendicular to the longitudinal direction of the belt portion 73, and a stress may be generated in the left-right direction in the belt portion 73. However, as described above, by forming the slit 73s in the belt portion 73, the rigidity of the belt portion 73 in the direction perpendicular to the longitudinal direction is particularly reduced as compared with the case where the slit 73s is not formed. Therefore, even when a stress in the left-right direction is generated in the belt portion 73, the stress acting on the first connection portion and the second connection portion can be reduced as compared with the case where the slit 73s is not formed, and the occurrence of a problem can be suppressed.

Next, the reflector unit 40 will be explained.

Fig. 12 is a perspective view of the light source unit, fig. 13 is a front view of the light source unit, and fig. 14 is a schematic sectional view of the light source unit. As shown in fig. 12 and 13, the reflector unit 40 has, as main components, a reflector 41 for the first light-emitting element 55, a first side reflector 41a for the first light-emitting element 55, a second side reflector 41b for the first light-emitting element 55, a reflector 42 for the second light-emitting element 63, a first side reflector 42a for the second light-emitting element 63, a second side reflector 42b for the second light-emitting element 63, and a light shielding portion 43.

The reflector unit 40 is disposed on the opposite side of the first substrate 50 from the heat sink 80. The reflector unit 40 is fixed to the heat sink 80 so that the first substrate 50 is sandwiched between the reflector unit 40 and the heat sink 80. In the present embodiment, two screws 46 are used to fix the reflector unit 40 to the heat sink 80.

As shown in fig. 4, the reflector unit 40 also has a rib 44. The rib 44 extends toward the first board 50, and a part of one end of the rib 44 on the first board 50 side contacts a mounting surface 50s of the first board 50 on which the first light-emitting element 55 is mounted. Therefore, the first substrate 50 is pressed against the first mounting surface 86 of the heat sink 80 by the reflector unit 40 and fixed to the heat sink 80. In the present embodiment, the reflector unit 40 has a plurality of ribs 44, and when the first substrate 50 is viewed in a plan view, the portions of the ribs 44 that contact the first substrate 50 overlap the first mounting surface 86. Therefore, the first substrate 50 can be more appropriately pressed against the first mounting surface 86, and the relative position of the first substrate 50 with respect to the heat sink 80 can be suppressed from changing due to vibration or the like.

In the present embodiment, as described above, since the grease as the fluid member is applied to the surface of the first substrate 50 opposite to the side on which the first light-emitting element 55 is mounted, the grease 24 is sandwiched between the first substrate 50 and the first mounting surface 86 as shown in fig. 14. Therefore, when the first substrate 50 is pressed against the first mounting surface 86, a part of the grease 24 may be pushed out from between the first substrate 50 and the first mounting surface 86. As described above, the first placement surface 86 is an end surface of the base 90 that protrudes forward from the front surface 82f of the first base plate 82, and the outer edge of the first placement surface 86 is surrounded by the outer edge of the first base plate 50. Therefore, the excess grease 24 pushed out from between the first base plate 50 and the first mounting surface 86 is pushed out onto the front surface 82f of the first base plate 82 around the base 90. Therefore, the adhesion of a part of the excess grease 24 to the mounting surface 50s of the first substrate 50 on which the first light-emitting element 55 is mounted is suppressed, and the adhesion of the excess grease 24 to the first light-emitting element 55 is suppressed.

As shown in fig. 14, the light shielding portion 43 is disposed between the first light emitting element 55 and the second light emitting element 63 in the vertical direction. The light shielding portion 43 of the present embodiment extends forward from between the first light emitting element 55 and the second light emitting element 63. In the present embodiment, a part of the first light emitted from the first light-emitting element 55 is irradiated onto the upper surface of the light-shielding portion 43, and the upper surface of the light-shielding portion 43 has the first reflection surface 43a that reflects the part of the first light toward the focal point of the projection lens 20. The first reflecting surface 43a is a concave reflecting surface that extends forward from the first light emitting element 55 side and reflects a part of the first light forward. In the present embodiment, a part of the second light emitted from the second light emitting element 63 is irradiated onto the lower surface of the light shielding portion 43, and the lower surface of the light shielding portion 43 has the second reflecting surface 43d that reflects a part of the second light toward the focal point of the projection lens 20. The second reflecting surface 43b is a concave reflecting surface that extends forward from the second light emitting element 63 side and reflects a part of the second light forward. The front end 43c of the light shielding portion 43 has a shape corresponding to a cutoff line described later, and is gradually recessed rearward from the left and right ends toward the center.

The reflector 41 is disposed above the first light-emitting element 55, and has a third reflection surface 41r on the first light-emitting element 55 side so as to cover the upper side of the first light-emitting element 55. The third reflecting surface 41r and the first reflecting surface 43a of the light shielding portion 43 are a pair of reflectors arranged to extend in the left-right direction and sandwich the first light emitting element 55 from the upper and lower sides.

As shown in fig. 12 and 13, the first side reflector 41a is formed at a position on one side of the first light-emitting element 55 in the left-right direction in the space between the first reflection surface 43a of the light shielding portion 43 and the third reflection surface 41r of the reflector 41. The second side reflector 41b is formed on the other side of the first light-emitting element 55 in the space. The first side reflector 41a and the second side reflector 41b are formed so that the distance therebetween increases from the rear toward the front.

As shown in fig. 14, the reflector 42 is disposed below the second light emitting element 63, and has a fourth reflecting surface 42r covering the lower side of the second light emitting element 63 on the second light emitting element 63 side. The fourth reflecting surface 42r and the second reflecting surface 43b of the light shielding portion 43 are a pair of reflectors arranged to extend in the left-right direction and sandwich the second light emitting element 63 from the upper and lower sides.

As shown in fig. 12 and 13, the first side reflector 42a is formed at a position on one side of the second light emitting element 63 in the left-right direction in a space between the second reflection surface 43b of the light shielding portion 43 and the fourth reflection surface 42r of the reflector 42. The second side reflector 42b is formed on the other side of the second light emitting element 63 in the space. The first side reflector 42a and the second side reflector 42b are formed so that the distance therebetween increases from the rear toward the front.

Next, the support plate 30 will be explained.

Fig. 15 is a perspective view of the support plate as viewed from the front, and fig. 16 is a perspective view of the support plate as viewed from the rear. The support plate 30 has elasticity, and as shown in fig. 15 and 16, includes a base portion 31, a pair of fixing portions 32, a pair of first light-shielding portions 33, a second light-shielding portion 34, and a third light-shielding portion 35. In the present embodiment, the base portion 31, the pair of fixing portions 32, the pair of first light-shielding portions 33, the second light-shielding portion 34, and the third light-shielding portion 35 are integrally formed by bending a metal plate. As shown in fig. 12 and 13, the support plate 30 is fixed to the heat sink 80 so as to cover a part of the second substrate 60 from the mounting surface 60s on which the second light-emitting element 63 is mounted.

The base portion 31 is disposed on the opposite side of the second substrate 60 to the heat sink 80 side, and extends along the second substrate 60 between the connector 64 and the second light-emitting element 63. The base portion 31 has a convex portion 31a, and the convex portion 31a protrudes toward the second substrate 60 side and contacts a surface of the second substrate 60 opposite to the second mounting surface 91 side. That is, the convex portion 31a contacts the mounting surface 60s of the second substrate 60 on which the second light emitting element 63 is mounted. In the present embodiment, the base portion 31 has two convex portions 31 a. Fig. 18 is a diagram showing the second substrate in fig. 9 in a plan view, and is an enlarged view of the vicinity of the positioning recess 62. As shown in fig. 7, 9, and 18, the contact portions 31b of the mounting surface 60s of the second substrate 60 on which the second light-emitting element 63 is mounted, which contact the two convex portions 31a, are located on the opposite side of the second substrate 60 from the positioning concave portion 62 toward the second light-emitting element 63. The number and position of the protrusions 31a of the support plate 30 are not particularly limited. In other words, the number and position of the contact portions 31b of the second substrate 60 that contact the convex portions 31a are not particularly limited.

As shown in fig. 15 and 16, one fixing portion 32 of the pair of fixing portions 32 is coupled to one outer edge portion of the base portion 31 in the left-right direction. The other fixing portion 32 is coupled to the outer edge portion of the other side of the base portion 31 in the left-right direction. As shown in fig. 15 and 16, the pair of fixing portions 32 are fixed to two bosses 100 of the heat sink 80 by screws 101.

The pair of fixing portions 32 are configured to be substantially bilaterally symmetrical, and include an inner wall portion 32a, an outer wall portion 32b, and a front wall portion 32 c. The inner wall portion 32a extends in a direction substantially perpendicular to the base portion 31 on the side opposite to the second substrate 60 side with respect to the base portion 31, and is connected to the base portion 31. The front wall portion 32c is located forward of the inner wall portion 32a and on the opposite side of the inner wall portion 32a to the base portion 31. The front wall portion 32c is substantially orthogonal to the inner wall portion 32a, extends substantially in the vertical direction, and is connected to the inner wall portion 32 a. The outer wall portion 32b extends substantially parallel to the inner wall portion 32a at a position rearward of the front wall portion 32c, and is connected to the front wall portion 32 c. The front wall portion 32c extends substantially in the vertical direction, and is formed with a through hole penetrating in the plate thickness direction of the front wall portion 32 c. As described above, the second board 60 extends obliquely forward and downward, and therefore, the second board 60 also extends obliquely forward and downward along the base portion 31. Therefore, the front wall portion 32c of the fixing portion 32 is not parallel to the base portion 31. The boss 100 of the heat sink 80 is disposed in a space surrounded by the inner wall portion 32a, the outer wall portion 32b, and the front wall portion 32c of the fixing portion 32, and the fixing portion 32 is fixed to the heat sink 80 by screws 101.

The second light shielding portion 34 is connected to an outer edge portion of the base portion 31 on the connector 64 side. The second light shielding portion 34 has an upper wall portion 34a and a pair of connecting wall portions 34 b. The upper wall portion 34a is disposed above the connector 64 and extends substantially parallel to the base portion 31. One connecting wall portion 34b is connected to one side in the left-right direction of the outer edge portion of the base portion 31 on the connector 64 side, and extends to the opposite side to the second substrate 60 side. The outer edge portion of the one connecting wall portion 34b on the side opposite to the base portion 31 side is connected to the outer edge portion of the upper wall portion 34a on the second light emitting element 63 side. The other connecting wall portion 34b is connected to the other side in the left-right direction of the outer edge portion of the base portion 31 on the connector 64 side, and extends to the opposite side to the second substrate 60 side. The outer edge portion of the other connecting wall portion 34b on the side opposite to the base portion 31 side is connected to the outer edge portion of the upper wall portion 34a on the second light emitting element 63 side. Such a second light shielding portion 34 covers a part of the connector 64 on the side opposite to the second substrate 60 side.

The third light shielding portion 35 is connected to the first side reflector 41a for the first light emitting element 55 in the outer edge portion of the base portion 31 on the second light emitting element 63 side. The third light-shielding portion 35 has a rear side wall portion 35a, a folded portion 35b, a side wall portion 35c, and a front side wall portion 35d, and shields a part of the first light by the front side wall portion 35 d. The rear side wall portion 35a is disposed on the first side reflector 41a side of the first and second light-emitting

elements

55 and 63, among the positions on the opposite side of the second substrate 60 side of the base portion 31. The rear side wall portion 35a extends vertically and laterally and is connected to the base portion 31. The folded portion 35b is disposed at a position on the opposite side of the first side reflector 41a from the first light emitting element 55 side, out of the positions forward of the rear side wall portion 35 a. The folded portion 35b extends substantially parallel to the rear side wall portion 35a, and is connected to the rear side wall portion 35a on the side opposite to the first side reflector 41a side. The side wall portion 35c is disposed at a position on the opposite side of the first side reflector 41a to the first light emitting element 55 side, out of positions forward of the folded portion 35 b. The side wall portion 35c extends in a direction substantially parallel to the inner wall portion 32a of the fixing portion 32, and is connected to the first side reflector 41a side of the folded portion 35 b. The front side wall portion 35d is disposed on the first side reflector 41a side of the first light-emitting element 55 and the second light-emitting element 63, out of the positions forward of the first side reflector 41 a. The front side wall portion 35d extends vertically and laterally and is connected to the side wall portion 35 c. Such a front side wall portion 35d shields a part of the first light emitted from the first light emitting element.

Next, the fixing of the second substrate 60 to the heat sink 80 will be described in detail.

Fig. 19 is a view showing a state where the second substrate is fixed to the heat sink, and is a sectional view of the light source unit LU passing through the convex portion 31a of the base portion 31 of the support plate 30. In fig. 19, the vicinity of the convex portion 31a is shown. As described above, the support plate 30 is fixed to the heat sink 80 by fixing the pair of fixing portions 32 to the bosses 100 of the heat sink 80 with the screws 101. Specifically, the front wall portion 32c of the fixing portion 32 is formed such that the end surface of the boss 100 is substantially parallel to and slightly separated from the front wall portion 32c in a state where the convex portion 31a of the base portion 31 is in contact with the second base plate 60 and the through hole of the front wall portion 32c is aligned with the position of the female screw 100 a. The support plate 30 is fixed to the heat sink 80 by inserting screws 101 into through holes of the front wall 32c and screwing the screws into the female screws 100 a. At this time, the support plate 30 is pressed toward the heat sink 80 by the screw 101 so that the gap between the end face of the boss 100 and the front wall portion 32c is narrowed. Here, since the front wall portion 32c substantially parallel to the end surface of the boss 100 extends substantially in the vertical direction, the support plate 30 is pushed rearward by the screw 101. As described above, the convex portion 31a of the base portion 31 contacts the mounting surface 60s of the second substrate 60 on which the second light-emitting element 63 is mounted. Therefore, the support plate 30 is elastically deformed, and the elastic force of the support plate 30 acts on the contact portion 31b of the second base plate 60. Since the support plate 30 is pushed rearward, the elastic force F acting on the support plate 30 of the contact portion 31b is rearward as shown in fig. 19. The second substrate 60 is fixed to the heat sink 80 by the elastic force F of the support plate 30. Here, as described above, since the second board 60 mounted on the second mounting surface 91 extends obliquely forward and downward, the direction in which the support plate 30 is pushed in and the mounting surface 60s of the second board 60 on which the second light emitting element 63 is mounted are not perpendicular to and parallel to each other. Therefore, the direction of the elastic force F of the support plate 30 is not perpendicular to and parallel to the mounting surface 60s of the second board 60. Therefore, the elastic force F of the support plate 30 is composed of a force F1 directed in a direction perpendicular to the second mounting surface 91 and a force F2 along the second mounting surface 91. Further, since the second board 60 placed on the second placement surface 91 extends obliquely forward and downward, the force F2 along the second placement surface 91 out of the elastic force F of the support plate 30 is directed upward.

The second board 60 is pressed against the second mounting surface 91 by a force F1 directed in a direction perpendicular to the second mounting surface 91 among the elastic forces F of the support plate 30. Further, the second board 60 is pushed upward along the second mounting surface 91 by a force F2 along the second mounting surface 91 out of the elastic forces F of the support plate 30, and a part of the side surface of the second board 60 is pressed by the outer peripheral surface of the protrusion 94 of the heat sink 80. More specifically, as shown in fig. 19, the second abutment surface 62s on the lower side of the positioning recess 62 of the second substrate 60 is pressed against the abutment surface 94s on the lower side of the protrusion 94 of the heat sink 80. That is, the force F2 along the second mounting surface 91 among the elastic forces F of the support plate 30 is a force pressing the second board 60 against the abutment surface 94s on the lower side of the projection 94, and thus the second board 60 is pressed against the abutment surface 94s on the lower side of the projection 94, and the second board 60 is suppressed from being displaced along the second mounting surface 91 to the opposite side of the pressing direction with respect to the abutment surface 94 s.

In the present embodiment, as described above, the two contact portions 31b are located on the opposite side of the second light-emitting element 63 side from the positioning recess 62 of the second substrate 60, and the protrusion 94 enters the positioning recess 62. That is, in a plan view of the second base plate 60, the lower abutment surface 94s of the protrusion 94 is positioned in the direction of the force F2 that presses the second base plate 60 against the lower abutment surface 94s of the protrusion 94 by the support plate 30 with respect to the contact portion 31 b. In the present embodiment, as shown in fig. 7, when the second board is viewed in plan, the two contact portions 31b overlap each other in a direction perpendicular to a direction of a force F2 in which the support plate 30 presses the second board 60 against the contact surface 94 s. One of the contact portions 31b corresponds to one of the protrusions 94, and the other contact portion 31b corresponds to the other protrusion 94. More specifically, as shown in fig. 19, when the second substrate 60 is viewed in plan, at least a part of the lower abutment surface 94s of one of the projections 94 is located between the straight line La and the straight line Lb. The straight line La is a straight line parallel to the direction of the force F2 in which the support plate 30 presses the second substrate 60 against the contact surface 94s in a plan view of the second substrate 60 and passing through one end of the one contact portion 31b in the direction perpendicular to the direction. The straight line Lb is parallel to the straight line La and passes through the other end of one of the contact portions 31 b. As shown in fig. 7, when the second substrate 60 is viewed in plan, at least a portion of the lower abutment surface 94s of the other protrusion 94 is located between the straight line Lc and the straight line Ld. Here, the positional relationship between the two protrusions 94 and the second base plate 60 shown by the broken lines in fig. 7 is a positional relationship in a state where the second base plate 60 is fixed to the heat sink 80 by the elastic force of the support plate 30. The straight line Lc is a straight line parallel to the direction of the force F2 with which the support plate 30 presses the second board 60 against the contact surface 94s in a plan view of the second board 60 and passing through one end of the other contact portion 31b in the direction perpendicular to the direction. The straight line Ld is a straight line parallel to the straight line Lc and passing through the other end of the other contact portion 31 b.

Further, a straight line La passing through one contact portion 31b is positioned on the opposite side to the other contact portion 31b side. The straight line Lc in the other contact portion 31b is located on the opposite side to the one contact portion 31b side. The straight line La and the straight line Lc are parallel to the direction of the force F2 in which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in plan. Therefore, the straight line La is also a straight line which is parallel to the direction of the force F2 in which the support plate 30 presses the second substrate 60 against the contact surface 94s and which passes through the end of the one contact portion 31b on the side opposite to the other contact portion 31b side in a plan view of the second substrate 60. The straight line Lc is also a straight line parallel to the straight line La and passing through the end of the other contact portion 31b opposite to the one contact portion 31 b. At least a part of the lower abutment surface 94s of one projection 94 and at least a part of the lower abutment surface 94s of the other projection 94 are located between the straight line La and the straight line Lc.

A straight line Lb passing through one of the contact portions 31b is located on the other contact portion 31b side, and a straight line Ld in the other contact portion 31b is located on the one contact portion 31b side. The straight line Lb and the straight line Ld are parallel to the direction of the force F2 in which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in plan. Therefore, the straight line Lb is also a straight line which is parallel to the direction of the force F2 in which the support plate 30 presses the second substrate 60 against the contact surface 94s and which passes through the end portion of the one contact portion 31b on the other contact portion 31b side in a plan view of the second substrate 60. The straight line Ld is also a straight line parallel to the straight line Lb and passing through the end portion of one of the other contact portions 31b on the contact portion 31b side. The center of gravity 60G of the second substrate 60 is located between the straight line Lb and the straight line Ld. Therefore, the center of gravity 60G of the second substrate 60 is also located between the straight line La and the straight line Lc.

In the present embodiment, as described above, since the grease 24 as a flow member is applied to the surface of the second substrate 60 opposite to the side on which the second light-emitting element 63 is mounted, the grease 24 is sandwiched between the second substrate 60 and the second mounting surface 91 as shown in fig. 14 and 19. Therefore, when the second substrate 60 is pressed against the second mounting surface 91, a part of the grease 24 may be pushed out from between the second substrate 60 and the second mounting surface 91. As described above, the second mounting surface 91 is an end surface of the base 95 protruding forward from the front surface 83f of the second bottom plate 83, and the outer edge of the second mounting surface 91 is surrounded by the outer edge of the second substrate 60. Therefore, the excess grease 24 pushed out from between the second substrate 60 and the second mounting surface 91 is pushed out onto the front surface 83f of the second bottom plate 83 around the base 95. Therefore, the adhesion of a part of the excess grease 24 to the mounting surface 60s of the second substrate 60 on which the second light-emitting element 63 is mounted is suppressed, and the adhesion of the excess grease 24 to the second light-emitting element 63 is suppressed. Further, the flow member is not limited to grease. The flow member is not limited to a member having fluidity at all times as long as it has fluidity at least when the first substrate 50 is placed on the first placement surface 86 and when the second substrate 60 is placed on the second placement surface 91. Therefore, the fluid members include uncured fluid members such as grease and adhesive which are not cured even after the first and

second substrates

50 and 60 are placed on the placement surfaces 86 and 91, and cured fluid members such as adhesive made of thermosetting resin which can be cured after the first and

second substrates

50 and 60 are placed on the placement surfaces, as shown in the present embodiment. The flow member sandwiched between the first substrate 50 and the first mounting surface 86 and the flow member sandwiched between the second substrate 60 and the second mounting surface 91 may be the same or different members.

As described above, the flow member recess 96 is formed between the outer peripheral surface of the lower side of the base 90 and the front surface 83f of the second bottom plate 83 on the upper side of the base 95 in the heat sink 80. An outer edge 86e of the outer edge of the first mounting surface 86 on the second mounting surface 91 side is substantially parallel to an outer edge 91e of the outer edge of the second mounting surface 91 on the first mounting surface 86 side, and extends in the left-right direction. The outer edge of the first mounting surface 86 is surrounded by the outer edge of the first substrate 50, and the outer edge of the second mounting surface 91 is surrounded by the outer edge of the second substrate 60. Therefore, an outer edge 86e of the outer edge of the first mounting surface 86 on the second mounting surface 91 side is an edge of the first mounting surface 86 on the second substrate 60 side in the region overlapping the first substrate 50. An outer edge 91e of the outer edge of the second mounting surface 91 on the first mounting surface 86 side is an edge of the second mounting surface 91 on the first substrate 50 side in the region overlapping the second substrate 60. That is, the flow member recess 96 is formed between the edge portion on the second substrate 60 side of the region overlapping with the first substrate 50 in the first mounting surface 86 and the edge portion on the first substrate 50 side of the region overlapping with the second substrate 60 in the second mounting surface 91. Therefore, a part of the grease 24 toward the second board 60 side of the excess grease 24 pushed out from between the first board 50 and the first mounting surface 86 can be accommodated in the flow member recess 96. Further, a part of the grease 24 toward the first board 50 out of the excess grease 24 pushed out from between the second board 60 and the second mounting surface 91 can be accommodated in the flow member recess 96. That is, a part of the excess grease 24 accumulated between the first substrate 50 and the second substrate 60 can be accommodated in the flow member recess 96.

As described above, the outer edge 86e of the outer edge of the first mounting surface 86, which is positioned at the lower end on the second mounting surface 91 side, is substantially parallel to the outer edge 91e of the outer edge of the second mounting surface 91, which is positioned at the upper end on the first mounting surface 86 side, and extends in the left-right direction. Therefore, the region sandwiched between the outer edge 86e and the outer edge 91e is a region in which the distance between the edge of the first mounting surface 86 on the second substrate 60 side in the region overlapping the first substrate 50 and the edge of the second mounting surface 91 on the first substrate 50 side in the region overlapping the second substrate 60 is the smallest. At least a portion of the flow member recess 96 is located in this region.

As shown in fig. 8, at least a part of the flow member recess 96 is located between a first straight line Lf passing through one end of the first light emitting element 55 of the first substrate 50 in the direction perpendicular to the direction from the first substrate 50 side toward the second substrate 60 side and parallel to the direction from the first substrate 50 side toward the second substrate 60 side, and a second straight line Ls passing through the other end and parallel to the first straight line Lf. That is, at least a part of the flow member recess 96 is located between a first straight line Lf passing through one end of the first light emitting element 55 in the left-right direction and parallel to the up-down direction and a second straight line Ls passing through the other end and parallel to the first straight line Lf. Although not illustrated, at least a part of the flow member recess 96 is located between a straight line that passes through one end of the second light emitting element 63 of the second substrate 60 in the direction perpendicular to the direction from the first substrate 50 side toward the second substrate 60 side and is parallel to the direction from the first substrate 50 side toward the second substrate 60 side, and another straight line that passes through the other end and is parallel to the straight line. That is, at least a part of the flow member recess 96 is located between a straight line passing through one end of the second light emitting element 63 in the left-right direction and parallel to the up-down direction and another straight line passing through the other end and parallel to the straight line.

Next, the projection lens 20 will be explained.

The projection lens 20 shown in fig. 1 to 4 is a plano-convex lens and is disposed in front of the light source unit LU. That is, the projection lens 20 is disposed forward of the light blocking portion 43. The projection lens 20 has a flange 21 on the outer periphery. Examples of the material for forming the projection lens 20 include resin and glass.

Further, the focal point of the projection lens 20 is located between the projection lens 20 and the front end 43c of the light shielding portion 43. Fig. 17 is an enlarged view of a portion surrounded by a broken line XVII in fig. 14. As shown in fig. 17, the focal point 20f of the projection lens 20 is located in front of the front end 43c of the light shielding portion 43.

As shown in fig. 17, the second light-emitting element 63 is disposed closer to the focal point 20f of the projection lens 20 than the first light-emitting element 55. Specifically, the second light-emitting element 63 of the present embodiment is disposed in front of the first light-emitting element 55. That is, the second light emitting element 63 is disposed closer to the focal point 20f of the projection lens 20 than the first light emitting element 55 in the front-rear direction. However, the second light emitting element 63 may be disposed at a position closer to the focal point 20f of the projection lens 20 than the first light emitting element 55 in the vertical direction. That is, the second light emitting element 63 may be disposed at a position closer to a horizontal plane passing through the focal point 20f of the projection lens 20 than the first light emitting element 55. Further, the second light-emitting element 63 of the present embodiment is arranged such that the normal N2 to the emission surface of the second light-emitting element 63 is closer to the vertical than the normal N1 to the emission surface of the first light-emitting element 55. That is, the first light-emitting element 55 and the second light-emitting element 63 are arranged such that an acute angle θ 2 formed by a normal N2 of the emission surface of the second light-emitting element 63 and a vertical plane VP parallel to the left-right direction is smaller than an acute angle θ 1 formed by a normal N1 of the emission surface of the first light-emitting element 55 and the vertical plane VP.

Next, the lens holder 25 will be explained.

The lens holder 25 shown in fig. 1 to 4 is disposed between the heat sink 80 and the projection lens 20. The projection lens 20 is fixed to a lens holder 25. By fixing the lens holder 25 to the heat sink 80, the relative positions of the projection lens 20, the lens holder 25, and the heat sink 80 are fixed. As described above, the reflector unit 40, the support plate 30, the first substrate 50, and the second substrate 60 are fixed to the heat sink 80. Accordingly, the relative positions of the reflector unit 40, the support plate 30, the first base plate 50, and the second base plate 60 with respect to the projection lens 20 and the lens holder 25 are also fixed.

The lens holder 25 has a cylindrical holding portion 26 and a leg portion 27. The lens holder 25 is formed of, for example, resin, and the holding portion 26 and the leg portion 27 are integrally formed. The holding portion 26 extends from the projection lens 20 side to the heat sink 80 side. The flange 21 of the projection lens 20 is fixed to the end of the holding portion 26 on the projection lens 20 side. The leg portion 27 extends from the end of the holding portion 26 on the heat sink 80 side toward the heat sink 80 side. In the present embodiment, the lens holder 25 has three leg portions 27. The two legs 27 are arranged side by side in the left-right direction, and the other leg 27 is arranged above the two legs 27 arranged side by side. Flange portions 28 are formed at respective ends of the three leg portions 27 on the radiator 80 side, and the flange portions 28 are fixed to the radiator 80 by screws 29.

Of the three legs 27 fixed to the heat sink 80 in this manner, the two juxtaposed legs 27 sandwich the pair of first light-shielding portions 33 of the support plate 30. Further, as described above, since the pair of first light-shielding portions 33 are respectively connected to the fixing portions 32 connected to the ends of the base portion 31 of the support plate 30 in the left-right direction, the pair of first light-shielding portions 33 are arranged in parallel in the left-right direction. Therefore, the first light shielding portion 33 is positioned between the projection lens 20 and one of the two leg portions 27 arranged in parallel, and the second light shielding portion 33 is positioned between the projection lens 20 and the other leg portion 27. By providing such a first light-shielding portion 33, at least a part of the sunlight that has entered through the projection lens 20 is irradiated to the first light-shielding portion 33 without being irradiated to the leg portion 27 of the lens holder 25. Therefore, damage of the lens holder 25 by sunlight is suppressed.

As described above, the upper wall portion 34a of the second light shielding portion 34 of the support plate 30 is disposed above the connector 64 and extends substantially parallel to the base portion 31. Therefore, the upper wall portion 34a of the second light shielding portion 34 is located between the connector 64 and the projection lens 20. By providing such a second light shielding portion 34, at least a part of the sunlight that has entered through the projection lens 20 is irradiated onto the upper wall portion 34a of the second light shielding portion 34 without being irradiated onto the connector 64. Therefore, damage of the connector 64 due to sunlight is suppressed. In addition, it is difficult to visually recognize the connector 64 through the projection lens 20, and the design of the lamp unit can be improved.

Next, the emission of light from the vehicle headlamp 1 of the present embodiment will be described.

Fig. 20 is a schematic cross-sectional view of the lamp unit, schematically showing an example of an optical path of light emitted from the first light-emitting element and the second light-emitting element. In fig. 20, the heat sink 80, the fan 81, and the like are not illustrated. Further, the angle of each reflecting surface, the reflection angle of light, the refraction angle, and the like may be inaccurate. As described above, the vehicle headlamp is symmetrical in the left and right of the vehicle. In the following description of the light distribution, the light distribution in the case where the vehicle headlamps provided on the left and right are turned on or off similarly will be described.

As shown in fig. 20, a part of the first light L1 emitted from the first light-emitting element 55 passes through the vicinity of the focal point 20f of the projection lens 20 without being reflected, and is directly incident on the rear surface side of the projection lens 20. The first light L1, which is another part of the first light L1 and is emitted from the center of the emission surface of the first light-emitting element 55 along the normal N1 shown in fig. 17, is reflected by the first reflection surface 43a of the light-shielding portion 43, passes through the vicinity of the focal point 20f of the projection lens 20, and enters the rear surface side of the projection lens 20. The other part of the first light L1 is reflected by the third reflection surface 41r of the reflector 41 and incident on the rear surface side of the projection lens 20. Although not illustrated, some of the first light L1 emitted from the first light-emitting element 55 and spreading in the left-right direction is reflected by the first and

second side reflectors

41a and 41b and enters the rear surface side of the projection lens 20. Further, of the first light L1, part of the light irradiated to the front side wall portion 35d of the third light shielding portion 35 of the support plate 30 is shielded by the front side wall portion 35 d. As described above, at least a part of the first light L1 incident from the flat incident surface on the rear surface side of the projection lens 20 passes through the projection lens 20 and the front cover 12 and is irradiated toward the front of the vehicle, thereby forming the light distribution of low beams shown in fig. 21 (a). In addition, in (a) in fig. 21, S denotes a horizontal line.

Further, a part of the second light L2 emitted from the second light emitting element 63 passes through the vicinity of the focal point 20f of the projection lens 20 without being reflected, and is directly incident on the rear surface side of the projection lens 20. The second light L2, which is the other part of the second light L2 and is emitted from the center of the emission surface of the second light-emitting element 63 along the normal N2 shown in fig. 17, is reflected by the second reflection surface 43b of the light-shielding portion 43, passes through the vicinity of the focal point 20f of the projection lens 20, and enters the rear surface side of the projection lens 20. The other part of the second light L2 is reflected by the fourth reflecting surface 42r of the reflector 42 and enters the rear surface side of the projection lens 20. Although not illustrated, some of the second light L2 emitted from the second light-emitting element 63 and spreading in the left-right direction is reflected by the first and

second side reflectors

42a and 42b and enters the rear surface side of the projection lens 20. Further, of the second light L2, part of the light irradiated to the front side wall portion 35d of the third light shielding portion 35 of the support plate 30 is shielded by the front side wall portion 35 d. As described above, at least a part of the second light L2 incident from the flat incident surface on the rear surface side of the projection lens 20 passes through the projection lens 20 and the front cover 12 and is irradiated toward the front of the vehicle. The light distribution of the second light L2 thus emitted is combined with the light distribution of the low beam to form the light distribution of the high beam shown in fig. 21 (B). In addition, in (B) in fig. 21, S denotes a horizontal line.

As described above, the vehicle headlamp 1 of the present embodiment includes the first light emitting element 55, the second light emitting element 63, the light shielding portion 43, and the projection lens 20. The focal point 20f of the projection lens 20 is located between the projection lens 20 and the front end 43c of the light shielding portion 43, and the second light-emitting element 63 is disposed closer to the focal point 20f of the projection lens 20 than the first light-emitting element 55.

In the vehicle headlamp 1 of the present embodiment, a part of the first light L1 and a part of the second light L2 are directly transmitted through the projection lens 20. That is, a part of the first light L1 and a part of the second light L2 enter the projection lens 20 without being reflected, and pass through the projection lens 20. Since the first light-emitting element 55 and the second light-emitting element 63 are arranged such that a part of the first light L1 and a part of the second light L2 are directly incident on the projection lens 20, the vehicle headlamp 1 does not need a large reflector as described in patent document 1. Therefore, the vehicle headlamp 1 of the present embodiment can be prevented from being increased in size.

In the vehicle headlamp 1 according to the present embodiment, the second light emitting element 63 is disposed closer to the focal point 20f of the projection lens 20 than the first light emitting element 55. Therefore, at the focal point 20f of the projection lens 20, the luminous intensity of the second light L2, which becomes a high beam, can be more easily increased than the luminous intensity of the first light L1, which becomes a low beam. Therefore, in the vehicle headlamp 1 of the present embodiment, the maximum luminous intensity of the high beam that is transmitted through the projection lens 20 and irradiated forward can be increased as compared with the maximum luminous intensity of the low beam. On the other hand, by disposing the first light-emitting element 55 at a position farther from the focal point 20f of the projection lens 20 than the second light-emitting element 63, the irradiation range of the first light L1 can be more easily expanded on the focal point plane of the projection lens 20 than the irradiation range of the second light L2. Therefore, in the vehicle headlamp 1 of the present embodiment, the irradiation range of the low beam can be further expanded than the irradiation range of the high beam.

In the vehicle headlamp 1 according to the present embodiment, the second light emitting element 63 is disposed forward of the first light emitting element 55, and the normal N2 of the emission surface of the second light emitting element 63 is closer to the vertical than the normal N1 of the emission surface of the first light emitting element 55. By disposing the second light emitting element 63 in a position forward of the first light emitting element 55, the second light emitting element 63 can be easily brought closer to the focal point 20f of the projection lens 20 than the first light emitting element 55. Here, when the angle formed by the normal N2 of the emission surface of the second light-emitting element 63 and the vertical plane VP is about the same as the angle formed by the normal N1 of the emission surface of the first light-emitting element 55 and the vertical plane VP, it is difficult for one of the first light and the second light to pass through the vicinity of the focal point 20f of the projection lens 20. By disposing the second light emitting element 63 so that the normal N2 of the emission surface of the second light emitting element 63 is more vertical than the normal N1 of the emission surface of the first light emitting element, the first light emitting element 55 and the second light emitting element 63 can be disposed so that both the second light and the first light can pass through the vicinity of the focal point 20f of the projection lens 20. Therefore, the light intensities of the low beam and the high beam of the vehicle headlamp 1 of the present embodiment can be improved.

In the vehicle headlamp 1 according to the present embodiment, the other part of the first light L1 is irradiated onto the upper surface of the light shielding portion 43, and the upper surface of the light shielding portion 43 has the first reflecting surface 43a that reflects the other part of the first light L1 toward the focal point 20f of the projection lens 20. By reflecting the other part of the first light L1 in this way, the first light L1 is converged at the focal point 20f of the projection lens 20, and the light intensity of the low beam can be further improved.

In the vehicle headlamp 1 according to the present embodiment, the other part of the second light L2 is irradiated onto the lower surface of the light shielding portion 43, and the lower surface of the light shielding portion 43 has the second reflecting surface 43b that reflects the other part of the second light L2 toward the focal point 20f of the projection lens 20. By reflecting the other part of the second light L2 in this way, the second light L2 is converged at the focal point 20f of the projection lens 20, and the luminous intensity of the high beam can be further improved.

In the vehicle headlamp 1 of the present embodiment, the plurality of second light emitting elements 63 are arranged in parallel in the left-right direction, and the average interval between the second light emitting elements 63 arranged in the center portion in the left-right direction is smaller than the average interval between the second light emitting elements 63 arranged in at least one end portion in the left-right direction. By adjusting the average interval between the plurality of second light-emitting elements 63 as described above, the maximum luminous intensity near the center of the high beam can be increased as compared with the case where the same number of second light-emitting elements 63 are arranged at equal intervals.

The present invention has been described above by taking the embodiments as examples, but the present invention is not limited thereto.

For example, in the above-described embodiment, an example has been described in which the acute angle θ 2 formed by the normal N2 of the emission surface of the second light-emitting element 63 and the vertical plane VP parallel to the left-right direction is smaller than the acute angle θ 1 formed by the normal N1 of the emission surface of the first light-emitting element 55 and the vertical plane VP. However, the magnitude of the acute angle θ 2 and the acute angle θ 1 is not particularly limited. However, by making the acute angle θ 1 and the acute angle θ 2 different from each other, the first light emitting element 55 and the second light emitting element 63 can be arranged such that both the second light L2 and the first light L1 pass through the vicinity of the focal point 20f of the projection lens 20. Therefore, the luminous intensities of the low beam and the high beam can be improved.

In the above-described embodiment, an example has been described in which the first light L1 emitted along the normal N1 of the emission surface of the first light-emitting element 55 is reflected by the first reflection surface 43a of the light-shielding portion 43 and passes through the vicinity of the focal point 20f of the projection lens 20. However, the first light L1 emitted along the normal N1 of the emission surface of the first light-emitting element 55 may not be reflected by the first reflection surface 43a of the light-shielding portion 43. For example, the first light L1 emitted along the normal N1 of the emission surface of the first light-emitting element 55 may pass through the vicinity of the focal point 20f of the projection lens 20 without being reflected and enter the rear surface side of the projection lens 20. The first reflecting surface 43a is not necessarily required.

In the above-described embodiment, an example has been described in which the second light L2 emitted along the normal N2 of the emission surface of the second light-emitting element 63 is reflected by the second reflection surface 43b of the light-shielding portion 43 and passes through the vicinity of the focal point 20f of the projection lens 20. However, the second light L2 emitted along the normal N2 of the emission surface of the second light-emitting element 63 may not be reflected by the second reflecting surface 43b of the light-shielding portion 43. For example, the second light L2 emitted along the normal N2 of the emission surface of the second light-emitting element 63 may pass through the vicinity of the focal point 20f of the projection lens 20 without being reflected and enter the rear surface side of the projection lens 20. The second reflecting surface 43b is not necessarily configured.

Industrial applicability of the invention

According to the present invention, a vehicle headlamp capable of being used in the field of vehicle headlamps for automobiles and the like is provided, which can suppress the increase in size.

Claims

1. A vehicle headlamp is characterized by comprising:

a first light emitting element that emits first light having a low beam, with a normal line of an emission surface of the first light emitting element directed obliquely downward toward the front;

a second light emitting element which is disposed below the first light emitting element, has a normal line of an emission surface directed obliquely upward in front, and emits second light that becomes high beam;

a light shielding portion disposed between the first light emitting element and the second light emitting element in a vertical direction; and

a projection lens disposed in front of the light shielding portion and directly transmitting a part of the first light and a part of the second light,

the focal point of the projection lens is located between the projection lens and the front end of the light shielding part,

the second light emitting element is disposed at a position closer to a focal point of the projection lens than the first light emitting element,

a portion of the first light and a portion of the second light pass through a vicinity of a focal point of the projection lens without being reflected.

2. The vehicular headlamp according to claim 1,

the second light emitting element is disposed so that a normal line of an emission surface of the second light emitting element is closer to a vertical direction than a normal line of an emission surface of the first light emitting element, in a position forward of the first light emitting element.

3. The vehicular headlamp according to claim 1,

another part of the first light is irradiated to the upper surface of the light shielding part,

the upper surface of the light shielding portion has a first reflection surface that reflects another part of the first light toward the focal point of the projection lens.

4. The vehicular headlamp according to claim 2,

5. The vehicle headlamp according to any one of claims 1 to 4,

the other part of the second light is irradiated to the lower surface of the light shielding portion, and the lower surface of the light shielding portion has a second reflecting surface that reflects the other part of the second light toward the focal point of the projection lens.

6. The vehicle headlamp according to any one of claims 1 to 4,

a plurality of the second light emitting elements are provided in parallel in the left-right direction,

the average interval of the second light emitting elements arranged in the center portion in the left-right direction is smaller than the average interval of the second light emitting elements arranged in at least one end portion in the left-right direction.

7. The vehicular headlamp according to claim 5,

8. The vehicle headlamp according to any one of claims 1 to 4,

the front end of the light shielding part is gradually recessed backward from the left and right ends toward the center.

9. The vehicle headlamp according to any one of claims 1 to 4,

the second light emitting element is disposed at a position closer to a horizontal plane passing through a focal point of the projection lens than the first light emitting element.