JP7205699B2 - Vehicle lighting device and vehicle lamp - Google Patents

Description

TECHNICAL FIELD Embodiments of the present invention relate to vehicle lighting devices and vehicle lamps.

BACKGROUND ART There is a vehicle lighting device that includes a socket and a light emitting module that is provided on one end of the socket and has a light emitting diode (LED).
When such a vehicle lighting device is attached to a vehicle lamp, the end of the socket on the side where the light-emitting module is provided is inserted into a hole provided in the housing of the vehicle lamp, whereby the vehicle lamp is mounted. By rotating the device, the bayonet provided on the outer surface of the socket is held by the housing of the vehicle lamp. Such a mounting method is called a twist lock.

In this case, an operator manually attaches the vehicle lighting device to the housing of the vehicle lamp or removes the vehicle lighting device from the housing of the vehicle lamp. Since such work is performed in a narrow space, there are cases where the vehicle lamp is rotated in a tilted state or the vehicle lamp is tightened with excessive force. In such a case, the bayonet may be unevenly shaved, or the torque may not be managed, and there is a risk that the abnormality of the sealing member (gasket) may go unnoticed. On the other hand, if the tightening force for the vehicle lighting device is too small, the vehicle lighting device may fall off the housing of the vehicle lamp.

In this case, it is conceivable to use a dedicated jig for mounting the vehicle lighting device, but a dedicated jig is prepared for each type of vehicle lighting device, or a large number of types are available at sales bases and repair bases around the world. Distributing a dedicated jig is not realistic.
Therefore, there has been a demand for the development of a technique that facilitates the appropriate mounting of a vehicle lighting device.

JP 2013-247093 A

The problem to be solved by the present invention is to provide a vehicle lighting device and a vehicle lamp that can be easily and appropriately attached.

A vehicle lighting device according to an embodiment includes a flange, a mounting portion provided on one side of the flange, and a plurality of heat radiation fins provided on a side of the flange opposite to the mounting portion. and a light-emitting module provided at the end of the mounting portion opposite to the flange side and having at least one light-emitting element. The plurality of radiating fins are arranged along the central axis of the socket, and when the vehicle lighting device is viewed from the direction along the central axis of the socket, at least one of the plurality of radiating fins has a shape of , is a polygon centered on the central axis.

According to the embodiments of the present invention, it is possible to provide a vehicle lighting device and a vehicle lamp that can be easily and appropriately attached.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic perspective view for illustrating the vehicle lighting apparatus which concerns on this Embodiment. FIG. 2 is a schematic perspective view when the vehicle lighting device in FIG. 1 is viewed from a radiation fin side; FIG. 2 is a schematic plan view when the vehicle lighting device in FIG. 1 is viewed from a direction along the central axis of the socket; It is a schematic perspective view for illustrating the vehicle lighting apparatus which concerns on other embodiment. It is a schematic perspective view for illustrating the vehicle lighting apparatus which concerns on other embodiment. 1 is a schematic partial cross-sectional view for illustrating a vehicle lamp; FIG.

Hereinafter, embodiments will be illustrated with reference to the drawings. In addition, in each drawing, the same reference numerals are given to the same constituent elements, and detailed description thereof will be omitted as appropriate.

(Vehicle lighting device)
The vehicle lighting device 1 according to the present embodiment can be installed in, for example, an automobile or a railroad vehicle. As the vehicle lighting device 1 provided in an automobile, for example, a front combination light (for example, a combination of a daytime running lamp (DRL), a position lamp, a turn signal lamp, etc.) and a rear combination light. Examples include those used for lights (for example, an appropriate combination of stop lamps, tail lamps, turn signal lamps, back lamps, fog lamps, etc.). However, the applications of the vehicle lighting device 1 are not limited to these.

FIG. 1 is a schematic perspective view for illustrating a vehicle lighting device 1 according to this embodiment.
FIG. 2 is a schematic perspective view of the vehicle lighting device 1 in FIG. 1 when viewed from the side of the radiation fins 14a and 14b.
As shown in FIGS. 1 and 2 , the vehicle lighting device 1 can be provided with a socket 10 , a light emitting module 20 , a power supply section 30 , and a heat transfer section 40 .

The socket 10 can have a mounting portion 11 , a bayonet 12 , a flange 13 , heat radiating fins 14 a , 14 b and a holder 15 .
The mounting portion 11 can be provided on the surface of the flange 13 opposite to the side on which the heat radiating fins 14a and 14b are provided. The external shape of the mounting portion 11 can be columnar. The external shape of the mounting portion 11 is, for example, a cylindrical shape. The mounting portion 11 can have a concave portion 11a that opens to the end face opposite to the flange 13 side. The light emitting module 20 can be provided on the bottom surface of the recess 11a with the heat transfer section 40 interposed therebetween.

The mounting portion 11 can be provided with at least one slit 11b. A corner of the substrate 21 can be provided inside the slit 11b. The dimension (width dimension) of the slit 11 b in the circumferential direction of the mounting portion 11 can be made slightly larger than the dimension of the corner portion of the substrate 21 . By doing so, the substrate 21 can be positioned by inserting the corner portion of the substrate 21 into the slit 11b.

Further, by providing the slit 11b, the planar shape of the substrate 21 can be enlarged. Therefore, the number of elements mounted on the substrate 21 can be increased. Alternatively, since the external dimensions of the mounting portion 11 can be reduced, the size of the mounting portion 11 can be reduced, and thus the size of the vehicle lighting device 1 can be reduced.

The bayonet 12 can be provided on the outer surface of the mounting portion 11 . For example, the bayonet 12 protrudes outward from the vehicle lighting device 1 . Bayonet 12 can be opposed to flange 13 . A plurality of bayonet 12 can be provided. The bayonet 12 can be used when mounting the vehicle lighting device 1 to the housing 101 of the vehicle lamp 100 . Bayonet 12 can be used for twist locks.

The flange 13 can have a plate shape. In the case illustrated in FIGS. 1 and 2, the flange 13 has a disk shape. The outer surface of the flange 13 can be positioned further outside the vehicle lighting device 1 than the outer surface of the bayonet 12 .

Two radiation fins 14a can be provided. At least one radiation fin 14b can be provided. That is, a plurality of radiation fins can be provided. The radiation fins 14a and the radiation fins 14b can be provided on the side of the flange 13 opposite to the mounting portion 11 side. The radiation fins 14a and the radiation fins 14b can be arranged side by side in a direction crossing the central axis 10a of the socket 10. As shown in FIG. In the direction in which the heat radiating fins 14a and 14b are arranged, the heat radiating fins 14a can be provided on both sides of the row.

The radiation fins 14a can have ribs 14a1. The ribs 14a1 may, for example, protrude in the opposite direction to the radiation fins 14b. If the ribs 14a1 protrude to the side opposite to the radiation fins 14b, the ribs 14a1 do not block the flow of air flowing between the radiation fins 14a and 14b.

In addition, the end portion 14a2 of the radiation fin 14a in the direction intersecting the central axis 10a of the socket 10 can be inclined toward the adjacent radiation fin 14b. The rigidity of the radiation fins 14a can be improved by providing the ribs 14a1 or by inclining the end portions 14a2.

Further, although the plate-shaped heat radiation fins 14a are illustrated, a thick block-shaped heat radiation fin 14a may be used. For example, the radiation fins 14a may have a thickness that is at least twice the thickness of the radiation fins 14b. In this case, the rib 14a1 can be provided, the end portion 14a2 can be inclined, or these can be omitted. In addition, in order to reduce the weight and improve the heat dissipation, it is also possible to provide a concave portion that opens to the end surface (top surface).

The radiation fins 14b can be plate-shaped. If the radiation fins 14b are plate-shaped, it becomes easy to provide a plurality of radiation fins 14b in a narrow space. Therefore, heat dissipation can be improved. In this case, the rigidity of the radiation fins 14b is smaller than that of the radiation fins 14a, but since the radiation fins 14a having a large rigidity are provided on both sides of the radiation fins 14b, the radiation fins 14b may be damaged by an external force. can be suppressed.

The holder 15 can have a cylindrical shape. The holder 15 can be provided on the side of the flange 13 opposite to the mounting portion 11 side. For example, the holder 15 can be spaced apart from the heat radiating fins 14b in a direction crossing the direction in which the heat radiating fins 14a and 14b are arranged. Inside the holder 15, end portions of the plurality of power supply terminals 31 can be exposed. A connector 105 can be inserted inside the holder 15 . The connector 105 inserted inside the holder 15 can be electrically connected to the plurality of power supply terminals 31 .

The heat generated in the light emitting module 20 is mainly transmitted to the heat radiation fins 14a and 14b via the mounting portion 11 and the flange 13. As shown in FIG. The heat transmitted to the heat radiation fins 14a and 14b is mainly released to the outside from the heat radiation fins 14a and 14b. Therefore, it is preferable to form the socket 10 from a material having high thermal conductivity. For example, socket 10 can be formed from a metal such as an aluminum alloy.

Moreover, in recent years, it is desired that the socket 10 can efficiently dissipate the heat generated in the light emitting module 20 and be lightweight. Therefore, it is preferable that the mounting portion 11, the bayonet 12, the flange 13, the heat radiation fins 14a, 14b, and the holder 15 are made of a highly thermally conductive resin. The highly thermally conductive resin includes, for example, a filler made of resin and inorganic material. The high thermal conductive resin can be, for example, a resin such as PET (polyethylene terephthalate) or nylon mixed with a filler made of carbon, aluminum oxide, or the like.

If the socket 10 includes a highly thermally conductive resin and the mounting portion 11, the bayonet 12, the flange 13, the heat radiation fins 14a, 14b, and the holder 15 are integrally molded, the heat generated in the light emitting module 20 can be efficiently dissipated. can dissipate heat. Also, the weight of the socket 10 can be reduced. Mounting portion 11, bayonet 12, flange 13, radiation fins 14a and 14b, and holder 15 can also be integrally molded with power supply portion 30 using an insert molding method or the like.

Also, for example, any one of the mounting portion 11, bayonet 12, flange 13, radiation fins 14a, 14b, and holder 15 may contain high thermal conductivity resin, and the rest may contain metal.

The light emitting module 20 can have a substrate 21 , a light emitting element 22 , a resistor 23 , a control element 24 , a frame portion 25 and a sealing portion 26 . The light emitting module 20 can be provided at the end of the mounting portion 11 opposite to the flange 13 side.
The substrate 21 can be adhered to the heat transfer section 40 . The adhesive is preferably an adhesive with high thermal conductivity. For example, the adhesive can be an adhesive mixed with a filler using an inorganic material. The inorganic material is preferably a material with high thermal conductivity (for example, ceramics such as aluminum oxide and aluminum nitride). The thermal conductivity of the adhesive can be, for example, 0.5 W/(m·K) or more and 10 W/(m·K) or less.

The substrate 21 may have a plate shape. The planar shape of the substrate 21 can be, for example, a square. The material and structure of the substrate 21 are not particularly limited. For example, the substrate 21 can be made of an inorganic material such as ceramics (for example, aluminum oxide or aluminum nitride), or an organic material such as paper phenol or glass epoxy. Alternatively, the substrate 21 may be a metal plate whose surface is covered with an insulating material. When the surface of the metal plate is covered with an insulating material, the insulating material may be made of an organic material or an inorganic material. When the amount of heat generated by the light emitting element 22 is large, it is preferable to form the substrate 21 using a material with high thermal conductivity from the viewpoint of heat dissipation. Examples of materials with high thermal conductivity include ceramics such as aluminum oxide and aluminum nitride, high thermal conductive resins, and metal plates coated with an insulating material. Further, the substrate 21 may have a single layer structure or may have a multilayer structure.

Also, a wiring pattern 21 a can be provided on the surface of the substrate 21 . The wiring pattern 21a can be formed of, for example, a material containing silver as a main component, or a material containing copper as a main component.

At least one light emitting element 22 can be provided. In the vehicle lighting device 1 illustrated in FIG. 1, a plurality of light emitting elements 22 are provided. The light emitting element 22 can be provided on the side of the substrate 21 opposite to the bottom side of the recess 11a. The light emitting element 22 can be provided inside the frame portion 25 . The light-emitting element 22 can be electrically connected to the wiring pattern 21a provided on the surface of the substrate 21 . In this case, the plurality of light emitting elements 22 can be electrically connected in series. Also, the light emitting element 22 can be electrically connected in series with the resistor 23 .

The light emitting element 22 can be, for example, a light emitting diode, an organic light emitting diode, a laser diode, or the like.
The format of the light emitting element 22 is not particularly limited. The light-emitting element 22 is, for example, a surface-mounted light-emitting element such as a PLCC (Plastic Leaded Chip Carrier) type, a bullet-shaped light-emitting element having lead wires, or a chip-shaped light-emitting element mounted by a COB (Chip On Board). and so on. In this case, if chip-shaped light emitting elements 22 are mounted by COB, many light emitting elements 22 can be provided in a narrow area. Therefore, it is possible to reduce the size of the light-emitting module 20 and thus the size of the vehicle lighting device 1 .

In the vehicle lighting device 1 illustrated in FIG. 1, a plurality of chip-shaped light emitting elements 22 are provided. The chip-shaped light emitting element 22 can be any one of a flip chip type light emitting element, an upper electrode type light emitting element, and an upper and lower electrode type light emitting element. The upper electrode type light emitting element or the upper and lower electrode type light emitting elements can be electrically connected to the wiring pattern 21a by wire bonding, for example. A flip chip type light emitting element can be directly mounted on the wiring pattern 21a.

The resistor 23 can be provided on the side of the substrate 21 opposite to the bottom side of the recess 11a. The resistor 23 can be electrically connected to the wiring pattern 21 a provided on the surface of the substrate 21 . The resistor 23 can be, for example, a surface-mounted resistor, a resistor having lead wires (metal oxide film resistor), or a film resistor formed using a screen printing method or the like. Note that the resistor 23 illustrated in FIG. 1 is a film resistor.

The material of the film resistor can be ruthenium oxide (RuO ₂ ), for example. A film resistor can be formed using, for example, a screen printing method and a firing method. If the resistor 23 is a film-like resistor, the contact area between the resistor 23 and the substrate 21 can be increased, so heat dissipation can be improved. Also, a plurality of resistors 23 can be formed at once. Therefore, productivity can be improved. In addition, variations in resistance values of the plurality of resistors 23 can be suppressed.

Here, since the forward voltage characteristics of the light emitting element 22 vary, if the voltage applied between the anode terminal and the ground terminal is constant, the brightness of the light emitted from the light emitting element 22 (luminous flux, luminance) , luminous intensity, and illuminance). Therefore, the value of the current flowing through the light emitting element 22 can be kept within a predetermined range by the resistor 23 so that the brightness of the light emitted from the light emitting element 22 is within a predetermined range. In this case, by changing the resistance value of the resistor 23, the value of the current flowing through the light emitting element 22 can be kept within a predetermined range.

When the resistor 23 is a surface-mounted resistor or a resistor having lead wires, the resistor 23 having an appropriate resistance value can be selected according to the forward voltage characteristics of the light emitting element 22 . If the resistor 23 is a film resistor, the resistance value can be increased by removing part of the resistor 23 . For example, a part of the resistor 23 can be easily removed by irradiating the resistor 23 with laser light. The number, size, arrangement, and the like of the resistors 23 are not limited to those illustrated, and can be appropriately changed according to the number and specifications of the light emitting elements 22 .

The control element 24 can be provided on the side of the substrate 21 opposite to the bottom side of the recess 11a. The control element 24 can be electrically connected to the wiring pattern 21 a provided on the surface of the substrate 21 . The control element 24 can be provided to prevent reverse voltage from being applied to the light emitting element 22 and to prevent pulse noise from being applied to the light emitting element 22 from the reverse direction. Control element 24 may be, for example, a diode.

In addition, a pull-down resistor can be provided for detecting disconnection of the light emitting element 22 and preventing erroneous lighting. Also, a covering portion may be provided to cover the wiring pattern 21a, the film-like resistor, and the like. The cover may contain, for example, a glass material.

In the case of a chip-shaped light emitting element 22, a frame portion 25 and a sealing portion 26 can be provided.
The frame portion 25 can be provided on the side of the substrate 21 opposite to the bottom side of the concave portion 11a. Frame 25 can be glued onto substrate 21 . The frame portion 25 may have a frame shape. A light-emitting element 22 can be provided in a region surrounded by the frame portion 25 . For example, the frame 25 can surround multiple light emitting elements 22 . The frame portion 25 can be made of resin. The resin can be, for example, a thermoplastic resin such as PBT (polybutylene terephthalate), PC (polycarbonate), PET, nylon, PP (polypropylene), PE (polyethylene), PS (polystyrene).

In addition, by mixing particles such as titanium oxide into the resin, the reflectance of the light emitted from the light emitting element 22 can be improved. Moreover, the frame part 25 can also be formed from white resin, for example. At least a part of the inner surface of the frame portion 25 can be an inclined surface that is inclined away from the central axis of the frame portion 25 as the distance from the substrate 21 increases. If the inner surface of the frame portion 25 is a slanted surface, it becomes easier for the light incident on the inner surface to be emitted toward the front side of the vehicle lighting device 1 . The frame portion 25 can have a function of defining the formation range of the sealing portion 26 and a function of a reflector.

Note that the frame portion 25 may be omitted. When the frame portion 25 is omitted, a dome-shaped sealing portion 26 is formed on the substrate 21 . In this case, if the frame portion 25 is provided, the formation range of the sealing portion 26 can be defined.

The sealing portion 26 can be provided in a region surrounded by the frame portion 25 . The sealing portion 26 can be provided so as to cover the area surrounded by the frame portion 25 . That is, the sealing portion 26 can be provided so as to cover the light emitting element 22 . The sealing portion 26 can be formed from a translucent material. The sealing portion 26 can be formed, for example, by filling a region surrounded by the frame portion 25 with resin. The filling of the resin can be performed using, for example, a liquid dispensing device such as a dispenser. The filling resin can be, for example, a silicone resin. Also, the sealing portion 26 can contain a phosphor. The phosphor can be, for example, a YAG-based phosphor (yttrium-aluminum-garnet-based phosphor). However, the type of phosphor can be appropriately changed so that a predetermined emission color can be obtained according to the application of the lighting device 1 for a vehicle.

The power feeding portion 30 can have a plurality of power feeding terminals 31 and insulating portions 32 .
The plurality of power supply terminals 31 may be rod-shaped and have electrical conductivity. A plurality of power supply terminals 31 can be arranged side by side in a predetermined direction. One end of the plurality of power supply terminals 31 protrudes from the bottom surface of the recess 11 a and can be electrically and mechanically connected to the wiring pattern 21 a provided on the substrate 21 . For example, one end of the power supply terminal 31 can be soldered to the wiring pattern 21a. The other ends of the plurality of power supply terminals 31 can be exposed inside the holder 15 . Note that the number, shape, arrangement, etc. of the power supply terminals 31 are not limited to those illustrated, and can be changed as appropriate.

As previously mentioned, socket 10 is preferably formed from a material with high thermal conductivity. However, materials with high thermal conductivity may have electrical conductivity. For example, metals such as aluminum alloys and highly thermally conductive resins containing fillers made of carbon have electrical conductivity. Therefore, the insulating portion 32 can be provided to insulate between the plurality of power supply terminals 31 and the conductive socket 10 . The insulating portion 32 can also have a function of holding the plurality of power supply terminals 31 . Note that if the socket 10 is made of an insulating, highly thermally conductive resin (for example, a highly thermally conductive resin containing a filler made of aluminum oxide), the insulating portion 32 can be omitted. In this case, the socket 10 can hold multiple power supply terminals 31 .

The insulating part 32 can have insulating properties. The insulating portion 32 can be formed from a resin having insulating properties. For example, the insulating portion 32 can be press-fitted into a hole provided in the socket 10 or adhered to the inner surface of the hole. Also, the socket 10 and the power supply portion 30 can be integrally molded by an insert molding method.

The heat transfer section 40 can be provided between the substrate 21 and the bottom surface of the recess 11a. The heat transfer section 40 can be adhered to the bottom surface of the recess 11a. The adhesive that bonds the heat transfer section 40 and the bottom surface of the recess 11a can be the same as the adhesive that bonds the substrate 21 and the heat transfer section 40, for example.

Alternatively, the heat transfer section 40 can be embedded in the bottom surface of the recess 11a by an insert molding method. The heat transfer section 40 can also be attached to the bottom surface of the recess 11a via a layer made of thermal conductive grease (radiating grease). The type of thermal conductive grease is not particularly limited, but for example, modified silicone may be mixed with a filler using a material with high thermal conductivity (for example, ceramics such as aluminum oxide and aluminum nitride). can. The thermal conductivity of the thermal conductive grease can be, for example, 1 W/(m·K) or more and 5 W/(m·K) or less.

The heat transfer section 40 is provided, for example, to facilitate the transfer of heat generated in the light emitting module 20 to the socket 10 . Therefore, it is preferable to form the heat transfer section 40 from a material having a high thermal conductivity. The heat transfer part 40 has a plate shape and can be made of metal such as aluminum, an aluminum alloy, copper, or a copper alloy, for example.

Here, when mounting the vehicle lighting device 1 to the housing 101 of the vehicle lamp 100, the portion of the mounting portion 11 provided with the bayonet 12 is inserted into the mounting hole 101a of the housing 101, and the vehicle lighting device is mounted. Rotate 1. Then, for example, the bayonet 12 is held by a fitting portion provided on the periphery of the mounting hole 101a. Such an attachment method is called a twist lock.

In general, when a vehicle lighting device is attached by a twist lock, an operator manually inserts the mounting portion 11 into the housing of the vehicle lighting device and rotates the vehicle lighting device. When removing the vehicle lighting device, the worker manually rotates the vehicle lighting device. Such work is performed in a narrow space inside the vehicle. Therefore, there is a possibility that the vehicular lighting device is inserted into the housing in an inclined state and then rotated as it is, or that the vehicular lighting device is rotated in an inclined direction and removed. In addition, there is a possibility that the vehicle lighting device is tightened with an excessive force. In such a case, the bayonet may be unevenly scraped, dust such as shavings may be generated inside the housing, and torque management may not be possible, and there is a risk that abnormalities such as seal members (gaskets) may go unnoticed. . On the other hand, if the tightening force for the vehicle lighting device is too small, there is a risk that the vehicle lighting device will fall off from the housing due to vibrations that accompany running.

In this case, it is conceivable to optimize the attachment using a dedicated jig for attaching and detaching the vehicle lighting device. However, there are many types of vehicle lighting devices, and many of them have different outer shapes and outer dimensions. In addition, attachment and detachment of the vehicle lighting device is performed at many locations such as a vehicle manufacturing factory, a vehicle repair shop, a vehicle sales base, and a vehicle lighting device sales base. In addition, such bases exist all over the world. Therefore, it is not realistic to prepare dedicated jigs for each of the many types of vehicle lighting devices and distribute them to bases all over the world.

Therefore, the vehicle lighting device 1 according to the present embodiment can be attached and detached using a general-purpose tool. In addition, tightening torque can be managed using a general-purpose measuring tool such as a torque wrench.

FIG. 3 is a schematic plan view of the vehicle lighting device 1 in FIG. 1 when viewed from a direction along the central axis 10a of the socket 10. As shown in FIG.
As shown in FIG. 3, when the vehicle lighting device 1 is viewed from the direction along the central axis 10a of the socket 10, the heat radiating fins 14a and 14b form a regular hexagon centered on the central axis 10a of the socket 10. can be provided inside. Also, at least two portions of the heat radiation fins 14a and 14b can be inscribed in a regular hexagon. In this case, it is preferable that the radiation fins 14a are inscribed in a regular hexagon. As described above, the rigidity of the radiation fins 14a is greater than the rigidity of the radiation fins 14b. Therefore, if the radiation fins 14a are inscribed in a regular hexagon, a larger force can be applied when attaching and detaching the vehicle lighting device 1 .

Further, it is more preferable that at least three or more of the radiation fins 14a and 14b are inscribed in the regular hexagon. If the number of heat radiation fins 14a and heat radiation fins 14b inscribed in the regular hexagon is increased, stress can be dispersed when torque is applied to the socket 10. FIG. Therefore, damage to the radiation fins 14a and 14b can be effectively suppressed. For example, as shown in FIG. 3, all the radiation fins 14a and 14b can be inscribed in a regular hexagon.

A holder 15 is provided on the side of the flange 13 on which the heat radiation fins 14a and 14b are provided. You can also make That is, at least two portions of the heat radiation fins 14a, the heat radiation fins 14b, and the holder 15 can be inscribed in a regular hexagon. In this way, stress can be further dispersed when torque is applied to the socket 10, so damage to the heat radiating fins 14a, 14b, and holder 15 can be more effectively suppressed.

In the above description, the case where at least two of the radiation fins 14a, the radiation fins 14b, and the holder 15 are inscribed in a regular hexagon was exemplified. You may make it touch. In this case, the polygon preferably has at least one pair of parallel sides. For example, polygons preferably have an even number of sides, such as quadrilaterals such as squares and rectangles, and hexagons, octagons, and the like. In this case, it is more preferable to use a regular hexagon that can be easily used with a general-purpose wrench, a general-purpose socket wrench, a general-purpose torque wrench, or the like. Also, the polygon preferably has dimensions that fit a socket wrench. If the polygon has dimensions suitable for a socket wrench, it becomes easy to manage the tightening torque using a general-purpose torque wrench.

FIG. 4 is a schematic perspective view for illustrating a vehicle lighting device 1a according to another embodiment. In the above description, at least two portions of the radiation fins 14a, 14b, and the holder 15 are inscribed in a polygonal shape, but the flange may be polygonal. That is, when the vehicle lighting device is viewed from the direction along the central axis of the socket, the shape of the flange may be a polygon centered on the central axis of the socket.
For example, in the case of the socket 10b illustrated in FIG. 4, the shape of the flange 13a is a regular hexagon when the vehicle lighting device 1a is viewed from the direction along the central axis 10ba of the socket 10b. Moreover, it is preferable that the center of gravity of the regular hexagonal flange 13a overlaps with the central axis 10ba of the socket 10b.

Also, the above-described embodiment and the present embodiment can be combined. For example, the shape of the flange 13a may be polygonal, and at least two portions of the heat radiation fins 14a, 14b, and the holder 15 may be inscribed in the polygon.

FIG. 5 is a schematic perspective view illustrating a vehicle lighting device 1b according to another embodiment. In the above-described one, the heat radiation fins 14a and the heat radiation fins 14b are arranged side by side in the direction intersecting the central axis 10a of the socket 10. As shown in FIG.
In the vehicle lighting device 1b illustrated in FIG. 5, a plurality of heat radiation fins 14c are provided side by side along the central axis 10ca of the socket 10c. In this case, the thickness of the radiation fins 14c can be made equal to or thinner than that of the flange 13a. At least one radiation fin 14c may be provided, but it is preferable to provide a plurality of radiation fins 14c in consideration of heat dissipation.

In addition, when the vehicle lighting device 1b is viewed from the direction along the central axis 10ca of the socket 10c, at least one of the plurality of radiation fins 14c is shaped like a polygon centering on the central axis 10ca. be able to. Note that the polygon can be the same as that described above. Also, the center of the polygon (the centroid of the polygon) can be made to overlap the central axis 10ca of the socket 10c. In this way, when attaching/detaching the vehicle lighting device 1b, a general-purpose tool or the like can be used to apply force to the heat radiation fins 14c. In this case, the bending moment applied to the radiating fin 14c is smaller than the bending moment applied to the radiating fins 14a and 14b, so damage to the radiating fin 14c can be suppressed.

In the case of the socket 10c illustrated in FIG. 5, when the vehicle lighting device 1b is viewed from the direction along the central axis 10ca of the socket 10c, the shape of the radiation fins 14c is a regular hexagon. Moreover, it is preferable that the center of gravity of the regular hexagonal radiator fins 14c overlaps with the central axis 10ca of the socket 10c. In addition, although the case where the shape of the flange 13a is a regular hexagon was illustrated, it is good also as the flange 13 etc. which have a circular shape, for example. However, if the flange 13a has a polygonal shape, force can be applied to at least one of the radiating fins 14c and the flange 13a having a polygonal shape.

(vehicle lamp)
Next, the vehicle lamp 100 is illustrated.
In the following description, as an example, the case where the vehicle lamp 100 is a front combination light provided in an automobile will be described. However, the vehicle lamp 100 is not limited to a front combination light provided in an automobile. The vehicle lighting device 100 may be a vehicle lighting device provided in an automobile, railroad vehicle, or the like. Moreover, below, the case where the lighting device 1 for vehicles is provided is illustrated as an example.

FIG. 6 is a schematic partial cross-sectional view for illustrating the vehicle lamp 100. As shown in FIG.
As shown in FIG. 6, the vehicle lamp 100 can be provided with a vehicle lighting device 1, a housing 101, a cover 102, an optical element 103, a sealing member 104, and a connector 105. FIG.

The vehicle lighting device 1 can be attached to the housing 101 . The housing 101 can hold the mounting portion 11 . The housing 101 can have a box shape with one end side open. The housing 101 can be made of, for example, a resin that does not transmit light. The bottom surface of the housing 101 can be provided with a mounting hole 101a into which a portion of the mounting portion 11 provided with the bayonet 12 is inserted. A recess into which the bayonet 12 provided on the mounting portion 11 is inserted can be provided on the peripheral edge of the mounting hole 101a. Although the case where the housing 101 is directly provided with the mounting hole 101a is illustrated, the housing 101 may be provided with a mounting member having the mounting hole 101a.

When the vehicle lighting device 1 is attached to the vehicle lamp 100, the portion of the mounting portion 11 provided with the bayonet 12 is inserted into the mounting hole 101a, and the vehicle lighting device 1 is rotated. Then, for example, the bayonet 12 is held by a fitting portion provided on the periphery of the mounting hole 101a. Such an attachment method is called a twist lock. When removing the vehicle lighting device 1, the vehicle lighting device 1 may be rotated in the opposite direction.

As described above, a general-purpose wrench, a general-purpose socket wrench, a general-purpose torque wrench, or the like can be used for attaching and detaching the vehicle lighting device 1 . Therefore, appropriate attachment can be easily performed. In addition, appropriate detachment can be easily performed. In addition, since general-purpose tools can be used, there is no need to prepare dedicated jigs for each type of vehicle lighting device or to distribute dedicated jigs to bases all over the world.

The cover 102 can be provided so as to close the opening of the housing 101 . The cover 102 can be made of a translucent resin or the like. The cover 102 can also have a function such as a lens.

Light emitted from the vehicle lighting device 1 enters the optical element 103 . The optical element 103 can reflect, diffuse, guide, and condense the light emitted from the vehicle lighting device 1, and form a predetermined light distribution pattern. For example, the optical element 103 illustrated in FIG. 6 can be a reflector. In this case, the optical element 103 can reflect the light emitted from the vehicle lighting device 1 to form a predetermined light distribution pattern.

A seal member 104 can be provided between the flange 13 and the housing 101 . The seal member 104 may have an annular shape. The seal member 104 can be made of an elastic material such as rubber or silicone resin.

When the vehicle lighting device 1 is attached to the vehicle lamp 100 , the sealing member 104 is sandwiched between the flange 13 and the housing 101 . Therefore, the internal space of the housing 101 can be sealed by the sealing member 104 . Also, the elastic force of the sealing member 104 presses the bayonet 12 against the housing 101 . Therefore, it is possible to prevent the vehicular lighting device 1 from detaching from the housing 101 .

The connector 105 can be fitted to the ends of the plurality of power supply terminals 31 exposed inside the holder 15 . A power source (not shown) or the like can be electrically connected to the connector 105 . Therefore, by fitting the connector 105 to the ends of the plurality of power supply terminals 31 , the light emitting element 22 can be electrically connected to a power source (not shown).

Further, the connector 105 can be provided with a sealing member 105a. When the connector 105 having the seal member 105a is inserted into the holder 15, the inside of the holder 15 is sealed so as to be watertight.

Although some embodiments of the present invention have been illustrated above, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, changes, etc. can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof. Moreover, each of the above-described embodiments can be implemented in combination with each other.

Reference Signs List 1 vehicle lighting device 1a vehicle lighting device 1b vehicle lighting device 10 socket 10a center shaft 10b socket 10ba center shaft 10c socket 10ca center shaft 11 mounting portion 12 bayonet 13 flange 13a Flange 14a Radiation fin 14b Radiation fin 14c Radiation fin 15 Holder 20 Light emitting module 21 Substrate 22 Light emitting element 100 Vehicle lamp 101 Housing

Claims (3)

a socket having a flange, a mounting portion provided on one side of the flange, and a plurality of heat radiating fins provided on a side of the flange opposite to the mounting portion;
a light emitting module provided at the end of the mounting portion opposite to the flange side and having at least one light emitting element;
and
the plurality of heat radiation fins are provided side by side along the central axis of the socket;
A vehicle lighting device, wherein at least one of the plurality of radiation fins has a polygonal shape centered on the central axis when the vehicle lighting device is viewed from a direction along the central axis of the socket. 2. The vehicular lighting device according to claim 1 , wherein when the vehicular lighting device is viewed from a direction along the central axis of the socket, the shape of the flange is a polygon centering on the central axis. A vehicle lighting device according to claim 1 or 2 ;
a housing to which the vehicle lighting device is attached;
A vehicle lamp equipped with

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