JP6936084B2 - Lighting unit and vehicle lighting - Google Patents

Description

The present invention relates to a lamp unit and a vehicle lamp, and more particularly to a lamp unit and a vehicle lamp in which a plurality of light emitting diodes are provided on the surface of an element mounting substrate.

Vehicle lighting fixtures can generally switch between low beam and high beam. The low beam illuminates a nearby vehicle with a predetermined illuminance, and has a light distribution regulation that does not give glare to an oncoming vehicle or a preceding vehicle, and is mainly used when traveling in an urban area. On the other hand, the high beam illuminates a wide area and a distant place in front with a relatively high illuminance, and is mainly used when traveling at high speed on a road where there are few oncoming vehicles or preceding vehicles. Therefore, although the high beam is more visible to the driver than the low beam, there is a problem that glare is given to the driver or pedestrian of the vehicle existing in front of the vehicle.

In recent years, an ADB (Adaptive Driving Beam) technique for dynamically and adaptively controlling a high beam light distribution pattern based on the surrounding conditions of a vehicle has been proposed. ADB technology reduces glare given to a vehicle or pedestrian by detecting the presence or absence of a preceding vehicle, oncoming vehicle or pedestrian in front of the vehicle and dimming the area corresponding to the vehicle or pedestrian. be. In such ADB technology, it has been proposed that light emitting elements such as a plurality of LEDs (Light Emitting Diodes) are mounted in a row on a substrate to turn off the LEDs in an area corresponding to a vehicle or a pedestrian (). For example, Patent Document 1).

Further, in recent years, it has been proposed that a large number of light emitting elements are two-dimensionally arranged on a substrate and the high beam light distribution pattern is controlled in more detail by selectively switching off and on of the light emitting elements. In a vehicle lamp with such a two-dimensional arrangement of light emitting elements, it is necessary to increase the mounting density of the light emitting elements and improve the accuracy of the mounting position in order to irradiate the two-dimensional light distribution pattern well. be. When an LED is used as a light emitting element, a surface mount type package is adopted, and a structure in which each LED is positioned and mounted on a land formed on a substrate is adopted and mounted at high density.

FIG. 18 is a schematic plan view showing a light source module 1 using the conventionally proposed ADB technique. As shown in FIG. 18, in the conventional light source module 1, a connector 3 for electrically connecting to the outside is mounted on the substrate 2, and a wiring pattern 4 is formed on the surface of the substrate 2 by extending from the connector 3. , A plurality of LEDs 5 are mounted on the wiring pattern 4. Further, in the light source module 1, the vicinity of the LED5 mounting portion of the wiring pattern 4 is formed to be wide, and is used as a heat dissipation pattern for satisfactorily dissipating heat generated by the light emission of the LED5.

Further, in the conventional light source module 1 shown in FIG. 18, a plurality of LEDs 5 are arranged symmetrically with respect to the center of the substrate 2, but the outer shape of the substrate 2 is formed asymmetrically on the left side of the vehicle. It is possible to determine whether it is for the left side lamp to be mounted or for the right side lamp to be mounted on the right side. As a result, the left and right sides of the light source module 1 when combined with the heat sink and the lens holder are discriminated, and erroneous assembly is prevented.

JP-A-2015-16773

If the substrate 2 is provided with a notch, a positioning hole, or the like to make the substrate 2 asymmetrical as in the prior art shown in FIG. 18, the area for forming the wiring pattern or the like on the substrate 2 is limited. It becomes difficult to minimize the area of the substrate 2 and reduce the size. Further, the shape of the substrate 2 cannot be made common to the left and right, and the number of parts increases.

However, when the substrate 2 is miniaturized to have a symmetrical shape in order to reduce the size of the lamp unit on which the light source module 1 is mounted and the number of parts, the arrangement of the LEDs 5 and the outer shape of the substrate are both symmetrical. , It becomes difficult to distinguish left and right. In particular, in the light source module 1 using the ADB technique, since the LED 5 is individually lit and controlled, there is a problem that the lit position cannot be appropriately controlled if left and right misassembly occurs.

Therefore, it is an object of the present invention to provide a lamp unit and a vehicle lamp that can prevent erroneous assembly with a simple configuration regardless of the shape of the substrate on which the LED is mounted.

In order to solve the above problems, the lamp unit of the present invention is arranged on a mounting board on which a light emitting element and a connector portion are mounted on the front surface, a heat sink arranged on the back surface side of the mounting board, and on the front surface side of the mounting board. while being, and a lens holder which is secured by a plurality of fixing portions relative to the heat sink, the lens holder, erroneous assembly preventing portion at a position corresponding to the connector portion is formed, to the connector portion A semi-fitting prevention portion is formed which is located at a predetermined distance from the housing end of the pair of connectors to be fitted .

In such a lamp unit of the present invention, the lens holder is formed with an erroneous assembly prevention portion at a position corresponding to the connector portion mounted on the mounting board, so that the connector portion and the erroneous assembly prevention portion are formed. It is possible to prevent erroneous assembly on the left and right due to the interference of the two, and it is possible to prevent erroneous assembly with a simple configuration regardless of the shape of the substrate on which the LED is mounted.

Further, in one aspect of the present invention, the connector portion and the misassembly prevention portion are provided at positions asymmetrical with respect to the plurality of fixing portions.

Further, in one aspect of the present invention, a plurality of the connector portions are provided.

Further, in one aspect of the present invention, a lateral extension portion formed so as to project laterally from the lens holder is provided, and the erroneous assembly prevention portion is formed on the heat sink side of the lateral extension portion. There is .

Further, in one aspect of the present invention, a plurality of the connector portion and the semi-fitting prevention portion are provided, and the distance from the side surface of the lens holder to the semi-fitting prevention portion differs for each connector portion.

Further, in order to solve the above problems, the vehicle lighting fixture of the present invention is characterized by including the lighting fixture unit according to any one of the above.

In such a vehicle lamp of the present invention, it is possible to prevent erroneous assembly with a simple configuration regardless of the shape of the substrate on which the LED is mounted.

INDUSTRIAL APPLICABILITY The present invention can provide a lamp unit and a vehicle lamp that can prevent erroneous assembly with a simple configuration regardless of the shape of the substrate on which the LED is mounted.

It is an exploded perspective view which shows the lamp unit 100 in 1st Embodiment. It is a schematic perspective view which shows the light source module 40 in 1st Embodiment. It is a schematic plan view which shows the mounting substrate 41 in 1st Embodiment. It is a figure explaining the structure of the mounting substrate 41 in 1st Embodiment in detail, FIG. 4A is an exploded perspective view, and FIG. 4B is a schematic cross-sectional view. It is a schematic plan view which shows the light source module 40 in the state which each member is mounted on the mounting board 41. It is an enlarged perspective view which shows the submount 43 in an enlarged manner. It is a partially enlarged sectional view which shows the state which the submount 43 is mounted in the light emitting part mounting area 49. It is an enlarged plan view which shows the periphery of the light emitting part mounting area 49 in an enlarged manner. It is a perspective view which shows typically the lens holder 20 in 2nd Embodiment. It is an exploded perspective view which shows typically the alignment of the heat sink 50 and the lens holder 20 in 2nd Embodiment. FIG. 5 is a front view of a state in which a light source module 40 is mounted on a heat sink 50 and a lens holder 20 and a lens 10 are fixed, as viewed from the lens 10 side. FIG. 12A is a diagram schematically showing a state in which a light source module 40 and a reflector 30 are mounted on a heat sink 50 and a lens holder 20 and a lens 10 are fixed. FIG. 12A is a side surface seen from the side extending portion 204 side. 12 (b) is a side view seen from the fixed portion 202c side. FIG. 13 (a) is a perspective view schematically showing a structural example of the reflector 30 in the third embodiment, FIG. 13 (a) is a perspective view seen from the light extraction direction, and FIG. 13 (b) is a side facing the mounting substrate 41. It is a perspective view seen from. FIG. 14A is a diagram schematically showing a structural example of the reflector 30, FIG. 14A is a front view seen from the light extraction direction, and FIG. 14B is shown by AA in FIG. 14A. It is sectional drawing which is the alternate long and short dash line. It is a figure which shows typically the state which the reflector 30 is mounted on the light source module 40, FIG. 15A is a front view seen from the light extraction side, and FIG. 15B is a perspective view. It is a partially enlarged sectional view schematically showing the relationship between the light source module 40 and the reflector 30 in 4th Embodiment. FIG. 17A is a partially enlarged cross-sectional view schematically showing a modified example of the reflector 30, FIG. 17A is an example in which a taper is formed in the recess 304a, and FIG. 17B is an example in which the recess 304a is vertically formed. FIG. 17C is an example in which the entire recess 304a is formed of a curved surface. It is a schematic plan view which shows the light source module 1 using the ADB technique which has been proposed conventionally.

(First Embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or equivalent components, members, and processes shown in the drawings shall be designated by the same reference numerals, and redundant description will be omitted as appropriate. FIG. 1 is an exploded perspective view showing a lamp unit 100 according to the present embodiment. The lamp unit 100 includes a lens 10, a lens holder 20, a reflector 30, a light source module 40, a heat sink 50, and a cooling fan 60, and each member is positioned with each other and fixed by a fixing means (not shown). There is.

The lens 10 is a member made of a translucent material and for irradiating the light from the light source module 40 forward so as to have a predetermined light distribution distribution, and corresponds to the projection lens in the present invention. The lens holder 20 is a member for holding the lens 10 in a state of maintaining the relative positional relationship between the light source module 40 and the reflector 30. The reflector 30 is a member arranged in front of the light source module 40 and reflecting the light from the light source module 40 forward, and corresponds to the optical member in the present invention.

The light source module 40 is a member that emits light in response to electric power and a signal supplied from the outside of the lamp unit 100, and the details will be described later. The heat sink 50 is a member having good thermal conductivity arranged in contact with the light source module 40 on the back surface of the light source module 40, and the cooling fan 60 having heat radiation fins formed on the back surface side is the back surface side of the heat sink 50. It is a member that is arranged in a heat sink and is supplied with electric power to generate an air flow.

In the lamp unit 100, when power and a signal are supplied from the outside, the light source module 40 emits light in response to the power and the signal, and the light reflected forward by the reflector 30 is forward in the lens holder 20 and through the lens 10. Is irradiated to. Further, the heat associated with the light emission of the light source module 40 is radiated into the air through the heat sink 50, and is cooled by the air blown from the cooling fan 60.

FIG. 2 is a schematic perspective view showing the light source module 40 in the present embodiment. The light source module 40 includes a mounting board 41, a wiring pattern 42, a submount 43, power supply connectors 44a and 44b, a metal wire 45a, a light absorbing resin portion 45, and a resist layer 46. An optical member mounting region 47 is formed in the optical member mounting region 47, and an optical member fixing portion 48 is formed in the optical member mounting region 47.

The mounting substrate 41 is a substantially flat member formed of a material having good thermal conductivity, and a wiring pattern 42 is formed on one surface thereof, and a plurality of submounts 43 and power supply connectors 44a and 44b are mounted. Has been done. Further, a resist layer 46 is formed so as to cover the wiring pattern 42. The material constituting the mounting substrate 41 is not limited, but it is preferable to use a metal having good thermal conductivity such as copper or aluminum.

Further, as the mounting substrate 41, a composite substrate in which an insulating substrate is bonded on a conductive substrate may be used, and examples thereof include a composite substrate in which a glass epoxy resin layer is bonded on a metal substrate. When the mounting substrate 41 is made of a metal substrate, it is preferable to form an antioxidant film on the back surface side of the mounting substrate 41 in order to prevent a decrease in thermal conductivity due to oxidation of the metal material. Examples of the method for forming the antioxidant film include preflux treatment and Au plating treatment, but Au plating treatment is preferable from the viewpoint of improving heat dissipation.

The wiring pattern 42 is a conductive pattern formed on the surface of the mounting board 41, and is for ensuring an electrical connection from the terminals of the power supply connectors 44a and 44b to the submount 43.

The submount 43 is mounted on the surface of the mounting substrate 41 and is electrically connected to the wiring pattern 42 by the metal wire 45a, and the submount 43 is supplied with electric power via the metal wire 45a to emit light according to the electric power. Is. The detailed structure of the submount 43 will be described later.

The power supply connectors 44a and 44b are members mounted on the surface of the mounting board 41 to secure an electrical connection with the outside, and a plurality of terminals are electrically connected to the wiring pattern 42, and the connector portion of the present invention is provided. Corresponds to. Although the shapes of the power supply connectors 44a and 44b are shown in a substantially rectangular parallelepiped in FIG. 2, the outer shape, terminal shape, and the like are not limited as long as they can be connected to correspond to known cable harnesses.

The lens holder 20 is fixed to the heat sink 50 by a plurality of fixing portions, and an erroneous assembly prevention portion is formed at a position corresponding to the power supply connectors 44a and 44b as described in detail in the second embodiment. (The illustration is omitted in FIGS. 1 and 2). As a result, it is possible to prevent left and right erroneous assembly due to interference between the power supply connectors 44a and 44b and the erroneous assembly prevention unit, and it is possible to prevent erroneous assembly with a simple configuration regardless of the shape of the mounting board 41 on which the LED is mounted. It will be possible.

Further, as will be described in detail later in the third embodiment, the reflector 30 extends to a position where it overlaps with the power supply connectors 44a and 44b in the surface view of the mounting board 41, and at least a part of the power supply connectors 44a and 44b. A connector concealing portion is formed to cover the connector (not shown in FIGS. 1 and 2). This makes it possible to improve the degree of freedom in component layout and suppress the influence of sunlight condensing on the member made of resin.

The metal wire 45a is a member for connecting the terminal provided on the submount 43 and the wiring pattern 42 formed on the mounting substrate 41, and is a metal conductive member that can be realized by a known wire bonding technique. be. The material constituting the metal wire 45a is not limited, and gold, copper, aluminum and the like can be used, but it is preferable to use gold.

The light-absorbing resin portion 45 is a resin member in which an inorganic filler and a light-absorbing material are mixed in a base resin, covers and seals a metal wire 45a, and corresponds to a wire protective resin portion in the present invention. The metal wire 45a may be sealed by the light absorbing resin portion 45 individually, but it is preferable to seal the plurality of metal wires 45a at once. As the base resin of the light-absorbing resin portion 45, a curable resin composition having high heat resistance, light resistance, and light transmissivity and good handling is preferable, and known sealing materials such as epoxy resin and silicone resin can be mentioned. Be done. In particular, in order to prevent the metal wire 45a from being deformed or broken due to stress applied to the metal wire 45a due to expansion or contraction of the light absorbing resin portion 45 due to heat, a silicone resin having a low elastic modulus after curing may be used as the base resin. preferable. Examples of the light-absorbing material mixed in the base resin include carbon filler and the like.

In the light source module 40 of the present embodiment, by covering the metal wire 45a with the light absorbing resin portion 45 and sealing the metal wire 45a, it is possible to prevent a conductive foreign substance from adhering to the metal wire 45a and causing a short circuit. Further, since the light-absorbing resin portion 45 contains a light-absorbing material, the light from the sub-mount 43 reaches the metal wire 45a and is reflected, and is irradiated to the outside of the lamp unit 100 as stray light. Can be prevented. In particular, when the light emitting element included in the submount 43 is selectively lit by using the ADB technique, it is possible to prevent the stray light reflected by the metal wire 45a from reaching the non-irradiated region, and the light emitting element can be emitted at a high density. It is possible to suppress the occurrence of glare while implementing.

When forming the light-absorbing resin portion 45, the base resin obtained by kneading the inorganic filler and the light-absorbing material is supplied onto the metal wire 45a by a dispenser or the like and then cured. The viscosity and thixotropy after kneading the light-absorbing material can be arbitrarily adjusted by selecting the base resin material and adjusting the amount of inorganic filler added in consideration of the moldability after application and the stress on the feeding wire. It is possible. The thixotropic property is (0.5 rpm viscosity) / (5 rpm viscosity) at 23 ° C., 0.5 rpm viscosity, and 5 rpm viscosity in the E-type viscometer, depending on the ejectability of the dispenser / moldability after application. Viscosity) is preferably 2.0 or more and 3.5 or less from the viewpoint of handling. When the thixotropy is set to this range, the fluidity of the base resin is maintained appropriately, and even if the submount 43 is not surrounded by a dam member or the like, the resin flows out and the metal wire 45a is exposed, and the metal wire 45a is exposed. It is possible to prevent gaps between the two and gaps in the lower part.

As will be described in detail later in the fourth embodiment, a recess is formed on the surface of the reflector 30 facing the mounting substrate 41 at a position overlapping the light absorbing resin portion 45 which is a wire protective resin portion in a plan view. .. As a result, interference between the reflector 30 and the light absorbing resin portion 45 can be prevented even if the reflecting surface is brought close to the light emitting element.

The resist layer 46 is an insulating film-like member formed on the surface side of the mounting substrate 41 so as to cover the wiring pattern 42. The material constituting the resist layer 46 is not limited, but the light reflectance in the region where the resist layer 46 is formed is uniform in order to suppress stray light due to the difference in light reflection between the surface of the mounting substrate 41 and the wiring pattern 42. It is preferable to use a light-reflecting material or a light-absorbing material so as to form a light-reflecting material.

The optical member mounting region 47 is a region on the surface of the mounting substrate 41 for mounting the reflector 30 which is an optical member, and is a region where the resist layer 46 is not formed and the surface of the mounting substrate 41 is exposed. The optical member mounting area 47 is located on both sides of the mounting board 41 with the area on which the submount 43 is mounted, and the reflector 30 is brought into contact with the optical member mounting area 47 and fixed to the submount. The reflector 30 can be arranged across the 43.

The optical member fixing portion 48 is a through hole provided in the optical member mounting region 47. The reflector 30 is brought into contact with the optical member mounting area 47, and a fixing member such as a screw is inserted into the optical member fixing portion 48 from the surface side of the mounting board 41 to fix the mounting board 41 and the reflector 30 to the heat sink 50. The formation position of the optical member fixing portion 48 will be described in detail later, but the submount 43 is arranged between the two optical member fixing portions 48.

FIG. 3 is a schematic plan view showing the mounting substrate 41 in the present embodiment. As shown in FIG. 2, a wiring pattern 42 is formed on the mounting substrate 41, and a resist layer 46 is formed so as to cover the wiring pattern 42. As shown in FIG. 3, the optical member mounting area 47, the light emitting unit mounting area 49 on which the sub mount 43 is mounted, the portion for bonding the metal wire 45a, and the power feeding connector mounting portion 44a1 on which the power feeding connectors 44a and 44b are mounted. A resist layer 46 is formed in a region excluding a portion connecting the terminals of the power supply connectors 44a and 44b with 44b1.

As described above, the light emitting unit mounting area 49 is an area for mounting a plurality of submounts 43, and is formed so that the submounts 43 can be arranged in two rows with the left and right directions in the drawing as the longitudinal direction. Further, the line L1 connecting the centers of the optical member fixing portions 48 has a positional relationship so as to cross substantially the center of the light emitting portion mounting region 49 along the longitudinal direction.

4A and 4B are views for explaining the structure of the mounting substrate 41 in the present embodiment in detail, FIG. 4A is an exploded perspective view, and FIG. 4B is a schematic cross-sectional view. As shown in FIG. 4A, the mounting substrate 41 is composed of a laminated structure of a metal plate 41a, an adhesive sheet 41b, and a glass epoxy resin layer 41c. The adhesive sheet 41b and the glass epoxy resin layer 41c are formed with openings 49b and 49c having a shape corresponding to the light emitting portion mounting region 49, respectively, and the positions of the openings 49b and 49c are the same. The openings 49b and 49c may be formed in advance in the predetermined regions of the adhesive sheet 41b and the glass epoxy resin layer 41c and attached in alignment with each other. The metal plate 41a and the glass epoxy resin layer 41c may be attached by the adhesive sheet 41b. After that, the openings 49b and 49c may be formed collectively by cutting or the like.

As shown in FIG. 4B, the adhesive sheet 41b and the glass epoxy resin layer 41c are laminated around the light emitting portion mounting area 49, and the wiring pattern 42 and the resist layer 46 are formed on the glass epoxy resin layer 41c. There is. Inside the light emitting portion mounting region 49, the surface of the metal plate 41a is partially exposed in the region corresponding to the openings 49b and 49c. Further, as described above, since the resist layer 46 is not formed in the optical member mounting region 47, the glass epoxy resin layer 41c is exposed in the optical member mounting region 47.

In the light source module 40 of the present embodiment, the resist layer 46 is not formed in the optical member mounting region 47, and the reflector 30 which is an optical member is directly mounted and fixed on the glass epoxy resin layer 41c. As a result, the positional deviation between the reflector 30 and the submount 43 caused by the variation in the film thickness of the resist layer 46 is suppressed, and the relative positional relationship between the optical member and the light emitting element 43c is precisely aligned to provide good light distribution characteristics. It is possible to irradiate light with. Further, by attaching the glass epoxy resin layer 41c to the metal plate 41a using the adhesive sheet 41b, it is not necessary to form an insulating layer containing a high thermal conductive filler on the metal plate 41a, which reduces the manufacturing process and manufacturing cost. It is possible to reduce the amount.

FIG. 5 is a schematic plan view showing the light source module 40 in a state where each member is mounted on the mounting substrate 41. Solder is applied to the power supply connector mounting portions 44a1, 44b1 and the terminal connection portion of the mounting board 41 shown in FIG. 4, and the surface mount type power supply connectors 44a, 44b are mounted by solder reflow. Further, the back surface of the submount 43 and the metal plate 41a exposed in the light emitting portion mounting area 49 are fixed with an adhesive, and after arranging a plurality of submounts 43 in two rows along the longitudinal direction, a metal wire is formed by wire bonding. The submount 43 and the wiring pattern 42 are electrically connected by 45a. Finally, the light absorbing resin portion 45 is applied to the plurality of metal wires 45a with a dispenser and cured. As described above, the line L1 connecting the centers of the optical member fixing portions 48 is located substantially in the center along the longitudinal direction of the submounts 43 arranged in two rows.

FIG. 6 is an enlarged perspective view showing the sub mount 43 in an enlarged manner. In the submount 43, a plurality of submount wirings 43b are formed on the submount substrate 43a, a plurality of light emitting elements 43c are mounted on the submount wiring 43b, and the side surfaces of the plurality of light emitting elements 43c are collectively light-reflecting. The resin portion 43d is sealed. Further, the light-reflecting resin portion 43d is not formed on a part of the submount substrate 43a, and the surface of the submount substrate 43a and the submount wiring 43b are exposed. The light emitting element 43c is flip-chip mounted inside the light-reflecting resin portion 43d so as to straddle the adjacent submount wirings 43b.

The submount substrate 43a is a substantially rectangular flat plate-shaped member made of a material having good insulating properties and good thermal conductivity, and is made of, for example, Si, AlN, or the like. The submount wiring 43b is a conductive pattern formed on one surface of the submount substrate 43a, and is electrically connected to the light emitting element 43c and the metal wire 45a is wire-bonded.

The light emitting element 43c is a member that is electrically connected to two metal wires 45a and emits light when a voltage is applied between the metal wires 45a, and is composed of a combination of an LED chip and a phosphor material. .. As the LED chip, a known compound semiconductor material such as a GaN system that emits a wavelength of blue, purple, or ultraviolet light as primary light can be used. As the phosphor material, a known material that is excited by the primary light and irradiates a desired secondary light can be used, and a material that obtains white color by mixing with the primary light from the LED chip and a plurality of phosphor materials can be used. It can be used to obtain white color by mixing a plurality of secondary lights.

The light-reflecting resin portion 43d is a member in which light-reflecting fine particles are mixed in the base resin, and examples thereof include a white resin in which fine particles such as titanium oxide are mixed, and the light emitted by the light emitting element 43c is satisfactorily reflected. Further, the light-reflecting resin portion 43d surrounds the light-emitting element 43c and is filled with the side surface sealed, and reflects the light emitted from the side surface of the light-emitting element 43c toward the inside of the light-emitting element 43c. As a result, the light emitted from the light emitting element 43c does not leak sideways from the side surface of the light emitting element 43c, and is satisfactorily irradiated to the outside from the upper surface of the light emitting element 43c.

As shown in FIG. 6, in the plurality of light emitting elements 43c arranged along the longitudinal direction of the submount 43, the distance between the side surfaces of the adjacent light emitting elements 43c is d1, and the distance between the centers of the light emitting elements 43c is d1. It is d2. As shown in FIG. 2, a plurality of submounts 43 are arranged in two rows above and below to form a light source unit, and a plurality of submount substrates 43a extending in the longitudinal direction are arranged adjacent to each other to form the first row. In addition to the configuration, the submount substrate 43a in the second row is arranged adjacent to the first row.

FIG. 7 is a partially enlarged cross-sectional view showing a state in which the submount 43 is mounted in the light emitting portion mounting area 49. The submount substrate 43a is fixed on the metal plate 41a exposed in the light emitting portion mounting region 49 with an adhesive, and the side surface of the light emitting element 43c on the submount substrate 43a is sealed with the light reflecting resin portion 43d. One end of the metal wire 45a is wire-bonded to the region on the submount substrate 43a where the light-reflecting resin portion 43d is not formed.

In the light source module 40 of the present embodiment, a plurality of light emitting elements 43c are mounted on the submount substrate 43a, and a metal wire 45a is wire-bonded to the submount wiring 43b formed on the surface of the submount substrate 43a to generate electric power. Supply. As a result, a large current can be supplied by the metal wire 45a having a high melting point, and the luminous intensity of the light source module 40 can be increased, as compared with mounting the light emitting element 43c directly on the wiring pattern 42 using solder. .. Further, by mounting the submount substrate 43a on the exposed metal plate 41a in the light emitting portion mounting area 49 and fixing it with an adhesive having a high heat resistant temperature, it is possible to mount the light emitting element 43c using solder. The heat-resistant temperature can be set high, and a large current can be supplied and the brightness can be increased.

As shown in FIG. 7, the wiring pattern 42 formed on the glass epoxy resin layer 41c is covered with the resist layer 46, but the resist layer 46 is formed at a position where the other end of the metal wire 45a is wire-bonded. Not. The entire metal wire 45a is sealed with a light absorbing resin portion 45, and is filled at the wire bond positions at both ends of the metal wire 45a and at the upper and lower portions of the metal wire 45a. The light absorbing resin portion 45 is formed adjacent to the light reflecting resin portion 43d at the wire bond position of the submount substrate 43a. In FIG. 7, the adhesive sheet 41b is not shown.

As described above, the sub-mount 43 is mounted on the metal plate 41a in the light emitting portion mounting area 49 without passing through the glass epoxy resin layer 41c, and the height dimension of the light emitting element in the sub mount 43 is the glass epoxy resin layer 41c. Greater than the thickness dimension of. Here, the height dimension of the light emitting element in the submount 43 is the distance from the bottom surface of the submount substrate 43a to the upper surface of the light emitting element 43c, and is, for example, about 1.3 mm.

In the light source module 40 of the present embodiment, since the height of the submount 43 is larger than the total thickness of the adhesive sheet 41b, the wiring pattern 42, and the resist 46, the upper surface of the light emitting element 43c, which is the light extraction surface of the submount 43, is glass. It is located above the epoxy resin layer 41c. As a result, it is possible to prevent the light emitted from the submount 43 from being incident on the side surface of the glass epoxy resin layer 41c and being blocked, and it is possible to satisfactorily extract the light and irradiate the light with desired light distribution characteristics.

In the light source module 40 of the present embodiment, after the metal plate 41a and the glass epoxy resin layer 41c are bonded to each other with the adhesive sheet 41b, the optical member fixing portion 48 is formed by punching from the back surface side of the mounting substrate 41. When the thickness dimension of the glass epoxy resin layer 41c is 0.05 mm to 0.2 mm, preferably 0.075 mm to 0.15 mm, burrs generated on the metal plate 41a during punching are suppressed by the glass epoxy resin layer 41c, and optical The reflector 30, which is a member, can be precisely aligned and fixed.

FIG. 8 is an enlarged plan view showing the periphery of the light emitting unit mounting area 49 in an enlarged manner. As shown in FIG. 8, the light-absorbing resin portion 45 collectively seals a plurality of metal wires 45a, covers the wiring pattern 42 from the wire bond position to the sub-mount 43, and has light reflectivity. It is formed up to a position adjacent to the resin portion 43d. Further, a plurality of submounts 43 are arranged along the left-right direction, and two rows are arranged adjacent to each other in the up-down direction to form the light source unit of the present invention.

In the light source unit in which the submounts 43 are arranged in the upper and lower two rows, the light emitting elements 43c are also arranged in two rows, and the line L2 shown in FIG. 8 is the light emitting center line indicating the intermediate position of the two rows of light emitting elements 43c. .. The light emitting center line L2 substantially coincides with the line L1 connecting the centers of the optical member fixing portions 48 shown in FIG. 5, and is an optical member on an extension line of the light emitting center line L2 of the plurality of light emitting elements 43c. The reflector 30 is fixed.

In the light source module 40 of the present embodiment, since the line L1 connecting the centers of the optical member fixing portions 48 and the light emitting center line L2 of the submount 43 substantially coincide with each other, the mounting substrate 41 is warped. In addition, by fastening the reflector 30 on the light emitting center line L2, the warp can be reduced and the positional relationship between the light source unit and the optical member can be appropriately set. Further, when the mounting board 41 including the heat sink 50 and the reflector 30 are fastened together, the back surface side of the light emitting portion mounting area 49 can be brought into close contact with the heat sink, and the heat dissipation characteristics are the same as those of the mounting board 41 without warpage. Can be obtained.

The wire bond position of the wiring pattern 42 is provided along the upper and lower sides in the drawing of the light emitting portion mounting area 49, and the metal wire 45a is wire-bonded to the submount 43 in the upper row in the drawing from the upper part in the drawing. A metal wire 45a is wire-bonded to the submount 43 in the lower row in the drawing from the lower part in the drawing. Therefore, the light emitting elements 43c in the first row and the second row are located between the metal wire 45a connected to the first row and the metal wire 45a connected to the second row.

In the vehicle lamp using the lamp unit 100 of the present invention, electric power is selectively supplied to the light emitting element 43c from the outside via the power supply connectors 44a and 44b, the wiring pattern 42, the metal wire 45a, and the submount wiring 43b. Then, the light emitting element 43c is turned on. The light distribution of the entire light source unit is determined by lighting the selected light emitting element 43c among the plurality of submounts 43 constituting the light source unit, and the lamp unit 100 is determined by the ADB technique via the reflector 30 and the lens 10. Illuminate a two-dimensional light distribution pattern forward.

(Second Embodiment)
Next, the second embodiment of the present invention will be described with reference to FIGS. 9 to 12. The description of the contents overlapping with the first embodiment will be omitted. FIG. 9 is a perspective view schematically showing the lens holder 20 in this embodiment. FIG. 9 shows a view of the lens holder 20 as viewed from the side mounted on the heat sink 50. As shown in FIG. 9, the lens holder 20 is erroneously assembled with the holder side wall portion 201, the fixing portions 202a to 202c, the positioning pin 203, the lateral extension portion 204, and the semi-fitting prevention portions 205a and 205b. It has prevention parts 206a and 206b.

FIG. 10 is an exploded perspective view schematically showing the alignment of the heat sink 50 and the lens holder 20 in the present embodiment. As shown in FIG. 10, fixing holes 502a to 502c and positioning holes 503 are formed on the mounting surface of the heat sink 50, and the light source module 40 and the reflector 30 are positioned and mounted.

The holder side wall portion 201 is a substantially cylindrical portion constituting the main body of the lens holder 20, one end portion holds the light incident surface side of the lens 10, and the other end portion is arranged so as to face the heat sink 50. Will be done. A plurality of fixing portions 202a to 202c, a positioning pin 203, a side extending portion 204, and erroneous assembly prevention portions 206a and 206b are integrally formed on the holder side wall portion 201 on the heat sink 50 side. Further, a structure for positioning and fixing the lens 10 is formed on the lens 10 side of the holder side wall portion 201 (not shown).

The fixing portions 202a to 202c are screw holes formed so as to project outward from the holder side wall portion 201 in the outward direction and the heat sink 50 direction, and are located at positions corresponding to the fixing holes 502a to 502c provided in the heat sink 50. It is formed. Since the fixing portions 202a to 202c are provided so as to project toward the heat sink 50 side, the distance between the holder side wall portion 201 and the heat sink 50 is secured, and the distance between the light source module 40 and the holder side wall portion 201 is also secured.

The positioning pin 203 is a pin-shaped portion formed in the vicinity of the fixing portions 202a to 202c and projecting in the heat sink 50 direction, and is formed at a position corresponding to the positioning hole 503 provided in the heat sink 50.

The lateral extension portion 204 is a flat plate-shaped portion formed by projecting outward from the holder side wall portion 201 on a cylindrical shape, and is formed at a position substantially corresponding to the power supply connectors 44a and 44b of the light source module 40. There is. Semi-fitting prevention portions 205a and 205b and erroneous assembly prevention portions 206a and 206b are formed on the heat sink 50 side of the side extension portion 204.

The semi-fitting prevention portions 205a and 205b are ribs erected on the heat sink side of the lateral extension portion 204, and are located on the outer periphery of the holder side wall portion 201 at a predetermined distance from the outer circumference of the holder side wall portion 201. It is formed in parallel. The protruding height of the semi-fitting prevention portions 205a and 205b toward the heat sink is such that when the lens holder 20 is fixed to the heat sink 50, it may interfere with the housing of the harness side connector connected to the power feeding connectors 44a and 44b. The height of. Further, the positions where the semi-fitting prevention portion 205a and the semi-fitting prevention portion 205b are formed are different from each other in the distance from the outer periphery of the holder side wall portion 201.

The erroneous assembly prevention portions 206a and 206b are ribs erected on the heat sink side of the lateral extension portions 204, and are formed by extending from the outer periphery of the holder side wall portion 201 toward the semi-fitting prevention portions 205a and 205b. Has been done. The protruding heights of the erroneous assembly prevention portions 206a and 206b toward the heat sink are set to be about the same as those of the semi-fitting prevention portions 205a and 205b. Further, the erroneous assembly prevention portions 206a and 206b are formed at positions and shapes along the housings of the power supply connectors 44a and 44b, respectively.

In the example shown in FIG. 2, the power supply connectors 44a and 44b each have a different number of terminals and have different widths, and the power supply connectors 44a and 44b are arranged asymmetrically on the mounting board 41 rather than evenly on the left and right sides. There is. Therefore, the power supply connectors 44a and 44b are in asymmetrical positions with respect to the arrangement of the plurality of fixing portions 202a to 202c for fixing the lens holder 20 to the heat sink 50, and the erroneous assembly prevention portions 206a and 206b are also fixed portions. It is provided asymmetrically with respect to the arrangement of 202a to 202c. Here, the asymmetry with respect to the arrangement of the fixed portions 202a to 202c means that at least two of the fixed portions 202a to 202c are not symmetrical with respect to the erroneous assembly prevention portions 206a and 206b.

As shown in FIGS. 9 and 10, in the lens holder 20 of the present embodiment, the distance between the lens 10 and the heat sink 50 is secured by the heights of the holder side wall portion 201 and the fixed portions 202a to 202c, and the lens 10 and the light source are used. The distance from the module 40 is secured. Further, the fixed portions 202a to 202c secure a distance between the holder side wall portion 201 and the heat sink 50, and the light source module 40 and the reflector 30 are held so as to be aligned with each other without interfering with the holder side wall portion 201.

Next, the functions of the semi-fitting prevention portions 205a and 205b and the misassembly prevention portions 206a and 206b will be described with reference to FIGS. 11 and 12. FIG. 11 is a front view of a state in which the light source module 40 is mounted on the heat sink 50 and the lens holder 20 and the lens 10 are fixed, as viewed from the lens 10 side. FIG. 12 is a diagram schematically showing a state in which the light source module 40 and the reflector 30 are mounted on the heat sink 50 and the lens holder 20 and the lens 10 are fixed, and FIG. 12 (a) is a diagram showing a state in which the lens holder 20 and the lens 10 are fixed. It is a side view seen from the side, and FIG. 12B is a side view seen from the fixed portion 202c side.

As shown in FIGS. 11 and 12, the positioning pin 203 is inserted into the positioning hole 503 of the heat sink 50, the fixing portions 202a to 202c and the fixing holes 502a to 502c are aligned, and screwed with screws. The lens holder 20 is fixed to the heat sink 50. Further, the harness-side connectors 400a and 400b corresponding to the power supply connectors 44a and 44b are inserted into the power supply connectors 44a and 44b, respectively. Here, only the housing portion of the harness-side connectors 400a and 440b is shown, and the wiring for connecting the harness-side connectors 400a and 400b to the outside is not shown.

At this time, since the holder side wall portion 201 of the lens holder 20 is held at a predetermined distance from the heat sink 50 by the fixing portions 202a to 202c, the mounting board 41, the power feeding connectors 44a and 44b, and the harness side connectors 400a and 400b are one. The portion can be located outside the holder side wall portion 201. Further, as shown in FIG. 11, the lateral extending portion 204 is positioned so as to cover between the power feeding connectors 44a and 44b and the harness side connectors 400a and 400b in a plan view. As described above, the power supply connectors 44a and 44b have different numbers of terminals and widths, and the harness-side connectors 400a and 400b also have different numbers of terminals and widths. Further, the depths of the housing portions of the harness-side connectors 400a and 400b are also different, and the amount of protrusion from the holder side wall portion 201 to the outside is also different.

As shown in FIG. 12B, in the fitted state in which the harness-side connectors 400a and 400b are sufficiently fitted into the power supply connectors 44a and 44b, respectively, the semi-fitting prevention portions 205a and 205b are the harness-side connectors 400a, respectively. It is located further outside from the holder side wall portion 201 than the housing portion of 400b, and the semi-fitting prevention portions 205a and 205b and the outer end portions of the harness side connectors 400a and 400b are separated by a predetermined distance.

On the other hand, in the semi-fitted state in which the harness-side connectors 400a and 400b are not sufficiently fitted into the power supply connectors 44a and 44b, respectively, the outer ends of the harness-side connectors 400a and 400b are larger than the semi-fitting prevention portions 205a and 205b. Since it is located on the outside, when the lens holder 20 is assembled to the heat sink 50, the semi-fitting prevention portions 205a and 205b interfere with the housing portions of the harness side connectors 400a and 400b, and the lens holder 20 assembly work cannot be performed. ..

As described above, in the lamp unit 100 of the present embodiment, in the work of assembling the lens holder 20 to the heat sink 50, the harness side connector 400a, depending on the presence or absence of interference between the semi-fitting prevention portions 205a, 205b and the harness side connectors 400a, 400b, The semi-fitted state of 400b can be checked. If the semi-fitting prevention portions 205a and 205b interfere with the housing portions of the harness-side connectors 400a and 400b, push the interfering harness-side connectors 400a and 400b into the power supply connectors 44a and 44b and insert them sufficiently. It is fitted and put into a fitted state.

As a result, the lamp unit 100 is assembled with the harness-side connectors 400a and 400b in a semi-fitted state, and it is possible to prevent the harness-side connectors 400a and 400b from falling off from the power supply connectors 44a and 44b due to vibration or the like during use. Further, as shown in FIGS. 12A and 12B, the semi-fitting prevention portions 205a and 205b are located outside the harness-side connectors 400a and 400b, and the tip thereof is a heat sink 50 rather than the harness-side connectors 400a and 400b. It protrudes to the side. As a result, it is possible to prevent the fitting state from being loosened due to vibration or the like during use of the lamp unit 100 and falling off after the semi-fitting state.

As shown in FIGS. 11 and 12 (a) and 12 (b), the misassembled prevention portions 206a and 206b are located between the power supply connectors 44a and 44b, respectively, and their tips are heat sinks rather than the harness-side connectors 400a and 400b. It is provided so as to project to the 50 side. Therefore, when the left and right sides of the light source module 40 are correctly mounted on the heat sink 50, the erroneous assembly prevention portions 206a and 206b do not interfere with the power supply connectors 44a and 44b and are inserted between them. At this time, the side surfaces of the erroneous assembly prevention portions 206a and 206b may come into contact with the power supply connectors 44a and 44b, and a predetermined interval may be secured.

On the other hand, if the left and right sides of the light source module 40 are erroneously mounted on the heat sink 50, the positions of the power supply connectors 44a and 44b are different from the correct mounting positions. The lens holder 20 cannot be assembled due to interference with the lens holder 20. This is because the power supply connectors 44a and 44b are provided at positions asymmetrical with respect to the mounting board 41 and the fixed portions 202a to 202c, and the erroneous assembly prevention portions 206a and 206b are also provided corresponding to the asymmetrical positions. Because.

As described above, in the lamp unit 100 of the present embodiment, in the work of assembling the lens holder 20 to the heat sink 50, the left and right of the light source module 40 are determined by the presence or absence of interference between the erroneous assembly prevention portions 206a and 206b and the power supply connectors 44a and 44b. Can be checked to see if it is correctly mounted on the heat sink 50. When the misassembly prevention portions 206a and 206b interfere with the power supply connectors 44a and 44b, the left and right sides of the light source module 40 are incorrect, so the light source module 40 is removed and replaced with the correct one. This makes it possible to prevent erroneous assembly of the light source module 40 with a simple configuration regardless of the shape of the mounting substrate 41.

Although FIGS. 1 to 12 show an example in which two power supply connectors 44a and 44b are provided as the connector portions, the shape of the connector portions is not limited and may be singular or three or more. When a plurality of power supply connectors 44a and 44b are provided as the connector portions, the number of terminals per connector portion can be reduced and the housing size of the connector portion can be reduced as compared with the case where a single power supply connector 44a is provided. As a result, the force required to insert the harness-side connector is small, so that the work in the assembly process of the lamp unit 100 can be facilitated.

Further, when a single power supply connector 44a is provided as a connector portion on the mounting board 41, it is important that the power feeding connector 44a is provided asymmetrically with respect to the mounting board 41 and the fixed portions 202a to 202c. Even when a single power supply connector 44a is provided in this way, by providing the erroneous assembly prevention portion 206a at the corresponding position of the lens holder 20, the power supply connector 44a is asymmetrical with respect to the fixed portions 202a to 202c, and power is supplied. Misassembly on the left and right can be prevented by interference between the connector 44a and the erroneous assembly prevention unit 206a.

Further, as the semi-fitting prevention portions 205a and 205b corresponding to the power supply connectors 44a and 44b, respectively, the harness side connectors to be fitted to the power supply connectors 44a and 44b by making the distance from the side surface of the holder side wall portion 201 different. The semi-fitting state can be checked according to the sizes of 400a and 400b. Further, if the left and right sides of the light source module 40 are erroneously attached, the semi-fitting prevention portions 205a and 205b will interfere with the harness side connectors 400a and 400b, and the semi-fitting prevention portions 205a and 205b also cause the light source module. You can check for 40 misassembly.

As described above, in the lamp unit 100 of the present embodiment and the vehicle lamp using the lamp unit 100, the lens holder 20 has the misassembly prevention unit 206a, which is located at a position corresponding to the power supply connectors 44a and 44b mounted on the mounting substrate 41. Since the 206b is formed, it is possible to prevent erroneous assembly on the left and right due to interference between the power supply connectors 44a and 44b and the erroneous assembly prevention portions 206a and 206b. It is possible to prevent assembly.

(Third Embodiment)
Next, the third embodiment of the present invention will be described with reference to FIGS. 13 to 15. The description of the contents overlapping with the first embodiment will be omitted. 13A and 13B are perspective views schematically showing a structural example of the reflector 30 in the present embodiment, FIG. 13A is a perspective view seen from the light extraction direction, and FIG. 13B is a mounting substrate 41. It is a perspective view seen from the opposite side. 14 is a diagram schematically showing a structural example of the reflector 30 in the present embodiment, FIG. 14 (a) is a front view seen from the light extraction direction, and FIG. 14 (b) is FIG. 14 (a). It is sectional drawing in the alternate long and short dash line shown by AA in the inside.

As shown in FIGS. 13 and 14, the reflector 30 of the present embodiment includes two substrate contact portions 301 on both sides, and the substrate contact portions 301 are provided with positioning holes 302a and 302b and fixing holes 303. ing. Further, the first reflecting portion 304, the second reflecting portion 305, and the third reflecting portion 306 are integrally formed between the two substrate contact portions 301, and the upper end of the third reflecting portion 306 is extended. The connector concealing portion 307 is formed.

Further, a light extraction opening 308 is formed between the first reflection unit 304 and the second reflection unit 305, and a light extraction opening 308 is formed between the second reflection unit 305 and the third reflection unit 306. Part 309 is formed. Further, a recess 304a is formed on the side of the first reflecting portion 304 facing the mounting substrate 41, and a recess 306a is formed on the side of the third reflecting portion 306 facing the mounting substrate 41.

The substrate contact portion 301 is a thin plate-shaped portion located at both ends of the reflector 30 in the width direction, and is formed corresponding to the position and shape of the optical member mounting region 47 on the mounting substrate 41. Further, the first reflecting portion 304, the second reflecting portion 305, and the third reflecting portion 306 are bridged and integrally formed between the left and right substrate contact portions 301. The surface of the substrate contact portion 301 facing the mounting substrate 41 is flat and comes into surface contact with the optical member mounting region 47 over substantially the entire area.

The positioning holes 302a and 302b are through holes formed in the substrate contact portion 301, and are formed corresponding to the positions and shapes of the positioning pins for the optical members provided in the heat sink 50. The light source module 40 and the reflector 30 are positioned by inserting the positioning pins for the optical member into the through holes and the positioning holes 302a and 302b provided in the light source module 40. The shape of the positioning hole 302a is substantially oval, and there is some play when the positioning pin is inserted. The shape of the positioning hole 302b is substantially circular, and the pin is precisely fitted when the positioning pin is inserted.

The fixing hole 303 is a through hole formed in the substrate contact portion 301, and is formed corresponding to the position and shape of the screw hole provided in the heat sink 50 and the optical member fixing portion 48 of the light source module 40. .. The reflector 30 and the mounting substrate 41 are fixed to the heat sink 50 by bringing the reflector 30 into contact with the optical member mounting region 47 and inserting a fixing member such as a screw into the fixing hole 303 from the surface side of the mounting substrate 41.

The first reflecting portion 304 is formed substantially parallel to the second reflecting portion 305 and the third reflecting portion 306 so as to bridge between the two left and right substrate contact portions 301, and the light extraction opening 308 side is tapered. It is a member that has a shape as a reflective surface. Further, a recess 304a is formed on the surface of the first reflecting portion 304 facing the mounting substrate 41. The position of the first reflecting portion 304 corresponds to the position of the light absorbing resin portion 45 on the mounting substrate 41, and has a length and a width covering the entire light absorbing resin portion 45.

The second reflecting portion 305 is formed substantially parallel to the first reflecting portion 304 and the third reflecting portion 306 so as to bridge between the two left and right substrate contact portions 301, and is formed on the light extraction opening 308 side and the light extraction opening 308 side. The light extraction opening 309 side is a member having a tapered reflective surface.

The third reflecting portion 306 is formed substantially parallel to the first reflecting portion 304 and the second reflecting portion 305 so as to bridge between the two left and right substrate contact portions 301, and the light extraction opening 309 side is tapered. It is a member that has a shape as a reflective surface. The reflective surface of the third reflective portion is extended in the lens 10 direction, and the connector concealing portion 307 is extended and integrally formed at the tip portion thereof. Further, a recess 306a is formed on the surface of the third reflecting portion 306 facing the mounting substrate 41. The position of the third reflecting portion 306 corresponds to at least the position of the light absorbing resin portion 45 on the mounting substrate 41, and has a length and width covering the entire light absorbing resin portion 45.

The connector concealing portion 307 is a portion formed by extending the tip of the reflecting surface of the third reflecting portion 306 in a direction substantially parallel to the mounting substrate 41, and is located in the lens 10 direction with respect to the substrate contact portion 301. There is. The distance of the connector concealing portion 307 from the surface of the mounting board 41 is at least larger than the housing height of the power supply connectors 44a and 44b. Further, the width of the connector concealing portion 307 is set to cover at least a part of the power feeding connectors 44a and 44b.

The light extraction opening 308 is an opening formed between the first reflecting portion 304 and the second reflecting portion 305, and corresponds to the position and shape of a plurality of light emitting elements 43c mounted on the light source module 40. ing. The light extraction opening 309 is an opening formed between the second reflecting portion 305 and the third reflecting portion 306, and corresponds to the position and shape of the plurality of light emitting elements 43c mounted on the light source module 40. ing.

The recess 304a is a recess provided on the surface of the first reflecting portion 304 facing the mounting substrate 41 over substantially the entire length direction of the first reflecting portion 304, and is provided at a predetermined distance from the light extraction opening 308. It is formed from the vertical position to the side opposite to the light extraction opening 308. The recess 306a is a recess provided on the surface of the third reflecting portion 306 facing the mounting substrate 41 over substantially the entire length direction of the third reflecting portion 306, and is provided at a predetermined distance from the light extraction opening 309. It is formed from the vertical position to the side opposite to the light extraction opening 308.

15A and 15B are views schematically showing a state in which the reflector 30 is mounted on the light source module 40, FIG. 15A is a front view seen from the light extraction side, and FIG. 15B is a perspective view. be. The light source module 40 and the reflector 30 are arranged on the heat sink 50, the positioning pins of the heat sink 50 are inserted into the positioning holes 302a and 302b, and the screws are screwed into the fixing holes 303 to fix the light source module 40 and the reflector 30.

As shown in FIGS. 15A and 15B, when the mounting substrate 41 is viewed in a plan view, the first reflecting portion 304 and the third reflecting portion 306 each cover the light absorbing resin portion 45 on the mounting substrate 41. A plurality of light emitting elements 43c are exposed from the light extraction openings 308 and 309. Further, the connector concealing portion 307 extends to a position where it overlaps with a part of the power feeding connectors 44a and 44b, and covers at least a part of the resin constituting the power feeding connectors 44a and 44b. Here, an example is shown in which the connector concealing portion 307 covers a part of the power supply connectors 44a and 44b and a part of the power supply connector 44a and 44b is exposed, but the power supply connector 44a and 44b may be entirely covered.

The lamp unit 100 of the present embodiment includes a lens 10 as a projection lens as shown in FIG. 1, and a plurality of light emitting elements 43c are arranged in the vicinity of the rear focal point of the lens 10. When electric power is supplied through the power supply connectors 44a and 44b, the light source module 40 lights up according to the supplied electric power, and the emitted light is taken out through the light extraction openings 308 and 309. The light from the light emitting element 43c is reflected by the reflecting surfaces of the first reflecting unit 304, the second reflecting unit 305, and the third reflecting unit 306 arranged in the vicinity of the light emitting element 43c, and passes through the lens holder 20 and the lens 10. Then, it is irradiated forward with a desired light distribution.

Also in this embodiment, the mounting board 41 is arranged in the vertical direction and the power feeding connectors 44a and 44b are arranged below the optical axis of the lens 10 as shown in FIG. Since the harness connection side of the power supply connectors 44a and 44b faces downward in this way, even if water droplets are generated in the lamp unit 100, the water droplets do not collect inside the power supply connectors 44a and 44b. Further, since the connector concealing portion 307 covers at least a part of the power feeding connectors 44a and 44b, the sunlight incident from the lens 10 is blocked by the connector concealing portion 307, and the sunlight is condensed on the feeding connectors 44a and 44b. It can be prevented from being melted.

Further, the first reflecting portion 304 and the third reflecting portion 306 include a light absorbing resin portion 45 which is a wire protective resin portion, and extend to a position where the light absorbing resin portion 45 overlaps and partially cover the light absorbing resin portion 45. It also has a function as a protective resin concealing portion in the present invention. Therefore, the sunlight incident from the lens 10 is blocked by the first reflecting portion 304 and the third reflecting portion 306, and it is possible to prevent the sunlight from condensing on the light absorbing resin portion 45 and being melted.

As described above, in the lamp unit 100 of the present embodiment and the vehicle lamp using the lamp unit 100, the reflector 30 is formed with a connector concealing portion 307 that extends to a position overlapping the power supply connectors 44a and 44b and covers at least a part thereof. As a result, it is possible to improve the degree of freedom in component layout and suppress the influence of sunlight condensing on the member made of resin.

(Fourth Embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIGS. 16 and 17. The description of the contents overlapping with the third embodiment will be omitted. FIG. 16 is a partially enlarged cross-sectional view schematically showing the relationship between the light source module 40 and the reflector 30 in the present embodiment.

As shown in FIG. 16, a plurality of submounts 43 are mounted on the mounting substrate 41, and a light absorbing resin portion 45 is formed adjacent to the submount 43. Here, the configuration of the submount 43 is the same as that shown with reference to FIG. 6 in the first embodiment, and the light absorbing resin portion 45 is the same as that shown with reference to FIG. 8 in the first embodiment. The metal wire 45a is sealed. Further, in order to seal the entire metal wire 45a, the light absorbing resin portion 45 is formed so as to be higher than the light emitting surface of the submount 43, for example, about 0.3 mm.

In this embodiment as well as in the third embodiment, the first reflecting portion 304 and the third reflecting portion 306 of the reflector 30 are arranged so as to cover the light absorbing resin portion 45. Further, recesses 304a and 306a are formed on the surfaces of the first reflecting portion 304 and the third reflecting portion 306 facing the mounting substrate 41 at positions overlapping with the light absorbing resin portion 45 in a plan view. The depths of the recesses 304a and 306a are, for example, about 0.2 to 0.5 mm.

In the present embodiment, the recesses 304a and 306a are formed at positions overlapping the light-absorbing resin portion 45 of the reflector 30, so that a margin between the upper end surfaces of the recesses 304a and 306a and the light-absorbing resin portion 45 is provided. Can be secured. Therefore, even if the height varies by, for example, about 0.2 mm due to a manufacturing error when the light absorbing resin portion 45 is formed, the reflector 30 can be prevented from interfering with the light absorbing resin portion 45, and the reflector 30 can be prevented from interfering with the light absorbing resin portion 45. It is possible to bring the reflecting surface of the light emitting element 43c closer to the light emitting surface of the light emitting element 43c.

Further, as shown in FIG. 16, the lower portions of the reflecting surface 304b and 306b are formed at the lower ends of the reflecting surface of the first reflecting portion 304 and the third reflecting portion 306 to positions lower than the recesses 304a and 306a, respectively, and the reflectors are formed. The upper end surfaces of the recesses 304a and 306a are located above the lower end of the reflective surface of 30. As a result, the lower reflection surfaces 304b and 306b can be brought closer to the light emitting surface of the submount 43 than the recesses 304a and 306a to, for example, about 0.3 to 0.4 mm, and the reflecting surface of the reflector 30 can be brought closer to the light emitting element 43c. It is possible to prevent the reflector 30 from interfering with the light absorbing resin portion 45 while reducing the light loss by making the reflectors closer to each other.

Further, as shown in FIG. 16, in a plan view, the end portions of the submount 43 and the end portions of the recesses 304a and 306a are substantially aligned with each other, preventing the recesses 304a and 306a from being formed wider than necessary. As a result, the widths of the reflecting surface lower portions 304b and 306b protruding downward from the recesses 304a and 306a can be secured, and the strength of the reflecting surface lower portions 304b and 306b can be secured.

FIG. 17 is a partially enlarged cross-sectional view schematically showing a modified example of the reflector 30 of the present embodiment, FIG. 17 (a) is an example in which a taper is formed in the recess 304a, and FIG. 17 (b) is a recess. An example is in which the 304a is formed vertically, and FIG. 17C is an example in which the entire recess 304a is formed with a curved surface. The shape of the recess 304a shown in FIGS. 17 (a) to 17 (c) is an example, and the shape is not limited. The same applies to the recess 306a formed on the surface of the third reflecting portion 306 facing the mounting substrate 41. Regardless of the shape of the recesses 304a and 306a, the upper end surfaces of the recesses 304a and 306a are farther from the mounting substrate 41 than the lower reflection surfaces 304b and 306b, so that interference with the light absorbing resin portion 45 can be prevented. ..

As described above, in the lamp unit 100 of the present embodiment and the vehicle lamp using the lamp unit 100, the reflecting surface is a light emitting element by forming recesses 304a and 306a at positions overlapping with the light absorbing resin portion 45 of the reflector 30. It is possible to prevent the reflector 30 from interfering with the light absorbing resin portion 45 even if the reflector 30 is brought close to the light absorbing resin portion 45.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention.

100 ... Optical unit 10 ... Lens 20 ... Lens holder 30 ... Reflector 40 ... Light source module 50 ... Heat sink 60 ... Cooling fan 201 ... Holder side wall portions 202a to 202c ... Fixed portion 203 ... Positioning pin 204 ... Lateral extension portions 205a, 205b ... Semi-fitting prevention part 206a, 206b ... Misassembly prevention part 301 ... Board contact part 302a ... Positioning hole 303 ... Fixing hole 304 ... First reflection part 305 ... Second reflection part 306 ... Third reflection part 304a, 306a ... Recesses 304b, 306b ... Reflective surface lower part 307 ... Connector concealing part 308, 309 ... Light extraction opening 400a ... Harness side connector 41 ... Mounting board 41a ... Metal plate 41b ... Adhesive sheet 41c ... Glass epoxy resin layer 42 ... Wiring Pattern 43 ... Submount 43a ... Submount substrate 43b ... Submount wiring 43c ... Light emitting element 43d ... Light reflective resin parts 44a, 44b ... Power supply connector 44a1, 44b1 ... Power supply connector mounting part 45 ... Light absorbing resin part 45a ... Metal Wire 46 ... Resist layer 47 ... Optical member mounting area 48 ... Optical member fixing portion 49 ... Light emitting part mounting area 49b, 49c ... Openings 502a to 502c ... Fixing hole 503 ... Positioning hole

Claims (6)

A mounting board with a light emitting element and a connector on the surface,
A heat sink arranged on the back surface side of the mounting board and
It is provided with a lens holder that is arranged on the surface side of the mounting substrate and is fixed to the heat sink by a plurality of fixing portions.
The lens holder has an erroneous assembly prevention portion formed at a position corresponding to the connector portion, and a semi-fitting prevention portion located at a predetermined distance from the housing end of a pair of connectors to be fitted to the connector portion. A lighting unit characterized by being formed. The lamp unit according to claim 1.
A lamp unit characterized in that the connector portion and the misassembly prevention portion are provided at positions asymmetrical with respect to the plurality of fixing portions. The lamp unit according to claim 1 or 2.
A lamp unit characterized in that a plurality of the connector portions are provided. The lamp unit according to any one of claims 1 to 3.
A lateral extension portion formed so as to project laterally from the lens holder is provided.
The erroneous assembly prevention portion is a lamp unit characterized in that it is formed on the heat sink side of the lateral extension portion. The lamp unit according to any one of claims 1 to 4.
A lamp unit characterized in that a plurality of the connector portion and the semi-fitting prevention portion are provided, and the distance from the side surface of the lens holder to the semi-fitting prevention portion is different for each connector portion. A vehicle lamp comprising the lamp unit according to any one of claims 1 to 5.

Images