JP2021106078A - Vehicular illuminating device, vehicular illuminating device set, and vehicular lighting fixture - Google Patents

Abstract

To provide a vehicular illuminating device, a vehicular illuminating device set, and a vehicular lighting fixture that can standardize a base part provided with a light emitting element.SOLUTION: A vehicular illuminating device according to an embodiment comprises a base part provided with at least one light emitting element, and an optical element provided on the base part and capable of housing the light emitting element internally. Some region of the optical element has higher transmittance of light than that of the other region.SELECTED DRAWING: Figure 1

Description

Embodiments of the present invention relate to vehicle lighting devices, vehicle lighting device sets, and vehicle lighting fixtures.

Wedge-based bulbs without a base are used as vehicle lighting devices. Wedge-based bulbs are incandescent bulbs. Therefore, from the viewpoints of power saving and long life, wedge-based light bulbs have come to be replaced with vehicle lighting devices equipped with light emitting diodes.

Here, the required light irradiation direction differs depending on the application of the vehicle lighting device. Wedge-based bulbs have a wide range of light distribution characteristics, making them easy to handle in a variety of applications.
On the other hand, the light emitting diode mainly irradiates light in a direction substantially perpendicular to the light emitting surface. Therefore, the mounting angle of the light emitting diode is changed so that the light is irradiated in a predetermined direction according to the application of the vehicle lighting device. For example, when irradiating light in a direction orthogonal to the direction in which the vehicle lighting device is inserted into the socket, a light emitting diode is provided on the surface of the plate-shaped base. For example, when irradiating light in the direction of inserting the vehicle lighting device into the socket, a light emitting diode is provided on the end face of the T-shaped base.

However, in this way, a plurality of types of bases having different configurations are required depending on the light irradiation direction (use of the vehicle lighting device). As a result, the manufacturing cost of the vehicle lighting device has increased.
Therefore, it has been desired to develop a technique capable of standardizing the base on which the light emitting element is provided.

Japanese Unexamined Patent Publication No. 2013-105652

An object to be solved by the present invention is to provide a vehicle lighting device, a vehicle lighting device set, and a vehicle lighting device capable of standardizing a base on which a light emitting element is provided.

The vehicle lighting device according to the embodiment includes a base provided with at least one light emitting element; and an optical element provided at the base and capable of accommodating the light emitting element inside. Some regions of the optical element have higher light transmittance than other regions.

According to the embodiment of the present invention, it is possible to provide a vehicle lighting device, a vehicle lighting device set, and a vehicle lighting device capable of standardizing a base on which a light emitting element is provided.

It is a schematic front view for exemplifying the vehicle lighting device which concerns on this embodiment. It is a schematic side view for exemplifying the vehicle lighting device which concerns on this embodiment. It is a schematic exploded view for exemplifying the installation of a light distribution control unit. It is a schematic side view for exemplifying the light distribution control part. It is a schematic perspective view for exemplifying the vehicle lighting device which concerns on another embodiment. (A) is a schematic perspective view for exemplifying a convex portion according to another embodiment. (B) is a cross-sectional view taken along the line AA of the convex portion in (a). (A) is a schematic perspective view for exemplifying a light distribution control unit according to another embodiment. (B) is a schematic plan view of the light distribution control unit. It is a schematic diagram for exemplifying the vehicle lighting device set which concerns on this embodiment. It is a schematic diagram for exemplifying the vehicle lamp equipment which concerns on this embodiment.

Hereinafter, embodiments will be illustrated with reference to the drawings. In each drawing, similar components are designated by the same reference numerals and detailed description thereof will be omitted as appropriate.
Examples of the vehicle lighting device 1 according to the present embodiment include those used for room lamps, meter lamps, reading lights, braking lights, turn signal lights, tail lights, etc. provided in automobiles, railroad vehicles, and the like. Can be done. However, the application of the vehicle lighting device 1 is not limited to these.

(Vehicle lighting device)
FIG. 1 is a schematic front view for exemplifying the vehicle lighting device 1 according to the present embodiment.
FIG. 2 is a schematic side view for exemplifying the vehicle lighting device 1 according to the present embodiment.
As shown in FIGS. 1 and 2, the vehicle lighting device 1 may be provided with a base 10, a light emitting circuit 20, and a light distribution control unit 30.

The base 10 can be a plate-like body. The planar shape of the base 10 can be, for example, a rectangle. In order to facilitate replacement with the conventional wedge-based bulb, the width dimension W of the base 10 can be 5.0 mm to 15.0 mm, for example, about 10.0 mm. The width dimension W is the dimension of the base 10 in the direction orthogonal to the direction in which the vehicle lighting device 1 is inserted into the socket 101.

The thickness T of the base 10 can be 0.5 mm to 3.0 mm, for example, about 2.0 mm. However, the width dimension W and the thickness T of the base portion 10 are not limited to those illustrated, and can be appropriately changed according to the dimensions of the recess of the socket 101 into which the base portion 10 is inserted.

The base 10 can be formed from an insulating material. The base 10 can be formed from an inorganic material such as ceramics (for example, aluminum oxide or aluminum nitride), an organic material (for example, paper phenol, glass epoxy, resin, etc.) or the like. Further, the base 10 may be a metal plate whose surface is coated with an insulating material.

The heat generated in the light emitting element 21 is transmitted to the base 10, and is discharged from the base 10 to the outside through the socket 101. Therefore, in consideration of suppressing the temperature rise of the light emitting element 21, it is preferable to form the base 10 using a material having high thermal conductivity. Examples of the material having high thermal conductivity include ceramics such as aluminum oxide and aluminum nitride, high thermal conductive resin, and a metal plate whose surface is coated with an insulating material. The high thermal conductive resin can be, for example, a resin such as PET (Polyethylene terephthalate) or nylon mixed with a filler using aluminum oxide, carbon (carbon) or the like.

A wiring pattern 10a1 can be provided on one surface 10a of the base portion 10. The wiring pattern 10a1 can be formed from a low resistance metal such as copper, aluminum, or silver. The wiring pattern 10a1 may have, for example, a mounting pad 10a1a and terminals 10a1b.

Circuit components constituting the light emitting circuit 20 can be mounted on the mounting pads 10a1a.
A pair of terminals 10a1b can be provided. The pair of terminals 10a1b can be provided in the vicinity of one end of the base 10. When the base 10 is attached to the socket 101, each of the pair of terminals 10a1b can come into contact with the socket terminals 101a and 101b provided in the socket 101. In this case, by bringing one socket terminal 101a provided on the socket 101 into contact with the one terminal 10a1b, the one socket terminal 101a can be electrically connected to the electrode of one polarity of the light emitting element 21. .. Further, by bringing the other socket terminal 101a into contact with the other terminal 10a1b, the other socket terminal 101a can be electrically connected to the electrode of the other polarity of the light emitting element 21.

The terminals 10a1b can also be provided on the other surface 10b of the base 10. The terminals 10a1b provided on the surface 10b can be provided at positions facing the terminals 10a1b provided on the surface 10a. The terminals 10a1b provided on the surface 10b can be electrically connected to the terminals 10a1b provided on the surface 10a via conductive vias. If the terminals 10a1b are also provided on the surface 10b, the reliability of contact with the socket terminals 101a and 101b provided on the socket 101 can be improved.

The light emitting circuit 20 may include, for example, a light emitting element 21, a resistor 22, a capacitor 23, and a diode 24.
At least one light emitting element 21 can be provided. The light emitting element 21 can be provided, for example, on the surface 10a of the base portion 10 in the vicinity of the end portion on the side opposite to the side on which the pair of terminals 10a1b are provided.

The light emitting element 21 may be, for example, a light emitting diode, an organic light emitting diode, a laser diode, or the like.
The light emitting element 21 can be, for example, a surface mount type light emitting element such as a PLCC (Plastic Leaded Chip Carrier) type, a bullet type light emitting element having a lead wire, or a chip-shaped light emitting element. However, considering the miniaturization of the vehicle lighting device 1, the light emitting element 21 is preferably a surface mount type light emitting element or a chip-shaped light emitting element. The light emitting element 21 illustrated in FIG. 1 is a surface mount type light emitting element.

When the light emitting element 21 is a chip-shaped light emitting element, the light emitting element 21 can be mounted on the mounting pad 10a1a by a COB (Chip On Board). In this case, the chip-shaped light emitting element 21, the wiring for electrically connecting the light emitting element 21 and the mounting pad 10a1a, the frame-shaped member surrounding the light emitting element 21 and the wiring, and the frame-shaped member provided inside the frame-shaped member to emit light. A sealing portion that covers the element 21 and the wiring can be provided on the surface 10a of the base portion 10. In addition, a phosphor can be included in the sealing portion. The phosphor can be, for example, a YAG-based phosphor (yttrium-aluminum-garnet-based phosphor). The types of phosphors are not limited to those illustrated. The type of phosphor can be appropriately changed so as to obtain a desired emission color according to the application of the vehicle lighting device 1.

The light emitting surface of the light emitting element 21 can be substantially parallel to the surface 10a of the base 10. For example, the light emitting element 21 mainly irradiates light in a direction perpendicular to the surface 10a of the base 10.
The number, size, arrangement, etc. of the light emitting elements 21 are not limited to those illustrated, and can be appropriately changed according to the size, application, and the like of the vehicle lighting device 1. When a plurality of light emitting elements 21 are provided, the plurality of light emitting elements 21 can be connected in series.

The resistor 22 can be provided, for example, on the surface 10a of the base portion 10 in a region between the pair of terminals 10a1b and the light emitting element 21.
The resistor 22 can be, for example, a surface mount type resistor, a resistor having a lead wire (metal oxide film resistor), a film-shaped resistor formed by using a screen printing method, or the like. The resistor 22 illustrated in FIG. 1 is a surface mount type resistor. If the surface mount type resistor is used, the mounting area can be reduced, so that the width dimension W of the base 10 can be easily matched with the width dimension of the portion where the lead of the wedge base bulb is provided.

Here, since the forward voltage characteristics of the light emitting element 21 vary, if the applied voltage between the anode terminal and the ground terminal is made constant, the brightness of the light emitted from the light emitting element 21 (luminous flux, brightness). , Luminous intensity, illuminance). Therefore, the value of the current flowing through the light emitting element 21 can be set within a predetermined range by the resistor 22 so that the brightness of the light emitted from the light emitting element 21 falls within a predetermined range. In this case, by changing the resistance value of the resistor 22, the value of the current flowing through the light emitting element 21 can be kept within a predetermined range.

When the resistor 22 is a surface mount type resistor or a resistor having a lead wire, the resistor 22 having an appropriate resistance value can be selected according to the forward voltage characteristic of the light emitting element 21. When the resistor 22 is a film-like resistor, the resistance value can be increased by removing a part of the resistor 22.

Further, the resistor 22 can further have a role of preventing an excessive current from flowing through the light emitting element 21.
The number, size, arrangement, etc. of the resistors 22 are not limited to those illustrated, and can be appropriately changed according to the number, specifications, and the like of the light emitting elements 21.

The capacitor 23 can be provided, for example, on the surface 10a of the base 10 in a region between the pair of terminals 10a1b and the light emitting element 21. The capacitor 23 can be provided, for example, for noise suppression and for smoothing the voltage. The capacitor 23 can be, for example, a surface mount type capacitor 23. If the surface mount type capacitor 23 is used, the mounting area can be reduced, so that it is easy to match the width dimension W of the base 10 with the width dimension of the portion where the lead of the wedge base bulb is provided.

The diode 24 can be provided, for example, on the surface 10a of the base 10 in a region between the pair of terminals 10a1b and the light emitting element 21. The diode 24 can be, for example, a surface mount diode, a diode having a lead wire, or the like. The diode 24 illustrated in FIG. 1 is a surface mount diode.

Here, since the wedge-based light bulb is an incandescent light bulb, one of the pair of leads may be electrically connected to the positive side of the power supply, and the other lead may be electrically connected to the negative side of the power supply. That is, the wedge-based bulb is non-polar. On the other hand, the light emitting element 21 such as a light emitting diode has polarity. Therefore, a diode can be provided to prevent the reverse voltage from being applied to the light emitting element 21.

Further, considering the replacement with the wedge-based light bulb, it is preferable to provide the vehicle lighting device 1 with a non-polar circuit. If the vehicle lighting device 1 is provided with a non-polar circuit, there is no directionality in mounting on the socket 101 as in the wedge-based light bulb. Therefore, the installation work of the vehicle lighting device 1 becomes easy.

For example, if a bridge circuit (bridge diode) is configured by using four diodes, a non-polar circuit can be provided in the vehicle lighting device 1. The diode 24 illustrated in FIG. 1 is a so-called two-element diode. If the diode 24 is a two-element diode, the bridge circuit can be formed by using the two diodes 24, so that the mounting area can be reduced. Therefore, it becomes easy to match the width dimension W of the base portion 10 with the width dimension of the portion where the lead of the wedge base bulb is provided.

The number, size, arrangement, etc. of the resistor 22, the capacitor 23, and the diode 24 are not limited to those illustrated. For example, at least a part of these elements may be provided on the surface 10b of the base 10. In this case, a wiring pattern can be provided on the surface 10b, and at least a part of these elements can be electrically connected to the wiring pattern. Further, a conductive via that penetrates the base portion 10 in the thickness direction is provided, and the wiring pattern 10a1 provided on the surface 10a and the wiring pattern provided on the surface 10b can be electrically connected by the conductive via.

Further, the circuit components constituting the light emitting circuit 20 are not limited to those illustrated. For example, the type of circuit component can be appropriately changed according to the function required for the vehicle lighting device 1. For example, a Zener diode, a thermistor, an integrated circuit, or the like can be appropriately provided as circuit components. The integrated circuit may include, for example, at least one of a blinking circuit, a constant current circuit, and a lighting circuit (drive circuit).

The circuit parts can also be provided in the housing 102 of the vehicle lighting device 100 on which the vehicle lighting device 1 is mounted. By doing so, the configuration of the vehicle lighting device 1 can be simplified, so that the cost of the vehicle lighting device 1 can be reduced. However, if the circuit component is provided in the vehicle lighting device 1, even if the socket to which the wedge-based light bulb is mounted is used as it is, the vehicle lighting device 1 can be protected and multifunctional.

Further, a cover 40 for covering circuit components such as a resistor 22, a capacitor 23, and a diode 24 can be further provided. The cover 40 can cover the area of the base 10 where the circuit components are provided. In this case, the region of the base 10 where the terminals 10a1b are provided can be exposed from the cover 40. The cover 40 is not always necessary, and may be provided as needed.

Here, since the wedge-based light bulb is an incandescent light bulb, it has a wide light distribution characteristic. Therefore, in the case of a wedge-based light bulb, even if the required light irradiation direction is different, the light can be irradiated in the required light irradiation direction.
On the other hand, since the light emitting element 21 mainly irradiates light in a direction substantially perpendicular to the light emitting surface, the light irradiation direction is determined by the mounting direction of the light emitting element 21. In this case, if the light irradiation directions are different, it is conceivable to change the mounting angle of the light emitting element 21 so that the light is irradiated in a predetermined direction.

For example, it is conceivable to prepare a plurality of types of bases having different shapes according to the light irradiation direction and select a base having an appropriate shape according to the light irradiation direction. However, if this is done, the manufacturing process and inventory control may become complicated, and the manufacturing cost may increase.

Therefore, the vehicle lighting device 1 is provided with a light distribution control unit 30.
FIG. 3 is a schematic exploded view for exemplifying the installation of the light distribution control unit 30.
FIG. 4 is a schematic side view for exemplifying the light distribution control unit 30.
As shown in FIGS. 3 and 4, the light distribution control unit 30 can have an optical element 30a and a holding unit 30b.

When the light distribution control unit 30 is attached to the base 10, the light emitting element 21 is housed in the space 30a1 inside the optical element 30a. At least a part of the light emitted from the light emitting element 21 is incident on the inner wall of the optical element 30a. As shown in FIG. 1, when the light distribution control unit 30 is viewed from a direction perpendicular to the surface 10a on which the light emitting element 21 is provided, the light distribution control unit 30 (optical element 30a) is the light of the light emitting element 21. It can be provided at a position where it overlaps with at least a part of the exit surface. For example, as shown in FIGS. 1 and 2, the light distribution control unit 30 (optical element 30a) can be provided at a position overlapping the light emitting surface of the light emitting element 21.
The external shape of the optical element 30a may be, for example, a part of a sphere, a polyhedron, or the like.

A part of the optical element 30a can have a higher light transmittance than the other regions. The region having high light transmittance can be, for example, a region including the opening 30a2 or a material having high transmittance (for example, a transparent material). If a region having a high light transmittance is provided, more light can be irradiated in the direction in which the region having a high light transmittance is provided. For example, the optical element 30a illustrated in FIGS. 1 to 4 is provided with an opening 30a2 substantially perpendicular to the surface 10a of the base 10. Therefore, the light emitted from the light emitting element 21 in a direction substantially perpendicular to the surface 10a of the base portion 10 can be emitted in a direction substantially parallel to the surface 10a through the opening 30a2. Therefore, the light irradiation direction can be changed by appropriately changing the position and shape of the region having high light transmittance.
Furthermore, by appropriately changing the size and number of regions having high light transmittance, the intensity of the irradiated light can be adjusted and the area of the irradiated region can be adjusted.

Further, if the region having high light transmittance is the opening 30a2, the transmitted light is not attenuated, so that the utilization efficiency of the light emitted from the light emitting element 21 can be improved. Further, since the space 30a1 inside the optical element 30a is connected to the external space through the opening 30a2, it becomes easy to release the heat generated in the light emitting element 21 to the outside. Therefore, it becomes easy to suppress the temperature rise of the light emitting element 21.

The region other than the region having high light transmittance can be a region having high reflectance. For example, a reflective film is provided on the incident surface (inner wall) of light in a region with high reflectance, light scattering particles such as titanium oxide are included in the material in the region with high reflectance, and a white material is used in the region with high reflectance. Can be formed using. If a region having a high reflectance is provided, the light incident on the region having a high reflectance can be reflected and emitted to the outside from the region having a high light transmittance. Therefore, the utilization efficiency of the light emitted from the light emitting element 21 can be improved.

The holding portion 30b can have a convex portion 30b1 and a protrusion 30b2. The convex portion 30b1 can be a pin-shaped body. One end of the convex portion 30b1 can be connected to the end of the optical element 30a on the base 10 side. The other end side of the convex portion 30b1 can be provided inside the base portion 10. The protrusion 30b2 can be provided at the end of the convex portion 30b1 on the side opposite to the optical element 30a side. The protrusion 30b2 projects in a direction intersecting the direction in which the convex portion 30b1 extends. As shown in FIG. 3, when the light distribution control unit 30 is attached to the base portion 10, the holding portion 30b is inserted into the hole 10c that penetrates the base portion 10 in the thickness direction. The convex portion 30b1 is provided inside the hole 10c, and the protrusion 30b2 comes into contact with the surface 10b of the base portion 10, so that the light distribution control unit 30 is held on the surface 10a of the base portion 10.

The protrusion 30b2 can also be omitted. When the protrusion 30b2 is omitted, the protrusion 30b1 can be press-fitted into the hole 10c or adhered. However, if the protrusion 30b2 is provided, the reliability of holding the optical element 30a can be improved. Further, since the holding portion 30b may be simply inserted into the hole 10c, the mounting work becomes easy.

At least one holding portion 30b can be provided. In this case, if the number of the holding units 30b is reduced, the work of attaching the light distribution control unit 30 becomes easy. For example, if the cross-sectional shape of the convex portion 30b1 and the cross-sectional shape of the hole 10c are polygonal, the position of the light distribution control unit 30 is located in the rotational direction around the holding portion 30b even if the number of the holding portions 30b is one. It is possible to suppress the deviation. In the case of the example shown in FIG. 1, the cross-sectional shape of the convex portion 30b1 and the cross-sectional shape of the hole 10c are rectangular.

The holding portion 30b may be omitted, and the optical element 30a may be adhered to the surface 10a of the base portion 10. However, if the optical element 30a is attached to the surface 10a of the base portion 10 by using the holding portion 30b, the bonding step can be omitted, so that the manufacturing time can be shortened and the manufacturing cost can be reduced.

The light distribution control unit 30 can be formed of, for example, a resin or a metal. In this case, the optical element 30a and the holding portion 30b can be integrally formed by using, for example, an injection molding method or a die casting method. For example, if the light distribution control unit 30 is formed by using a metal having a high reflectance such as a white resin or aluminum, the above-mentioned region having a high reflectance can be easily formed. For example, if the light distribution control unit 30 is formed of resin, the weight and cost of the vehicle lighting device 1 can be reduced.

The vehicle lighting device 1 according to the present embodiment has different light by appropriately changing the position and shape of the region having high light transmittance provided in the light distribution control unit 30 (optical element 30a). It becomes possible to correspond to the irradiation direction of. In this case, even if the required light irradiation direction changes, it is not necessary to change the base 10 provided with the light emitting circuit 20. That is, even when the required light irradiation direction is different depending on the application of the vehicle lighting device 1, the base 10 on which the light emitting element 21 is provided can be shared.

In this case, a plurality of types of light distribution control units 30 are required to correspond to various light irradiation directions (various uses), but the light distribution control unit 30 is easily formed by using an injection molding method or the like. And the manufacturing cost is low. Therefore, the manufacturing cost does not increase significantly.
Further, when the holding portion 30b is provided, the light distribution control portion 30 can be attached to the base portion 10 simply by inserting the holding portion 30b into the hole 10c. Therefore, it is possible to prevent the manufacturing process and work contents from becoming complicated.

FIG. 5 is a schematic perspective view for exemplifying the vehicle lighting device 1a according to another embodiment. As shown in FIG. 5, the vehicle lighting device 1a may be provided with a base 11, a light emitting circuit 20, and a light distribution control unit 31.

The base 11 can have a portion 11a (corresponding to an example of the first portion) and a portion 11b (corresponding to an example of the second portion).
The portion 11a has a plate shape and can have the same configuration as the base portion 10 described above. However, the light emitting element 21 and the optical element 31a are not provided in the portion 11a. The light emitting element 21 and the optical element 31a are provided on the surface of the portion 11b opposite to the portion 11a side.
The portion 11b has a plate shape and can be provided on the end surface of the portion 11a on the side opposite to the side where the terminals 10a1b are provided. That is, although the above-mentioned base 10 was a plate-like body, the base 11 has a three-dimensional structure such as a T-shape.
The material of the portion 11a and the material of the portion 11b can be the same as the material of the base 10 described above.

The portion 11a and the portion 11b can be integrated by using, for example, an injection molding method. By doing so, the manufacturing cost can be reduced.
Further, the plate-shaped portion 11a and the plate-shaped portion 11b can be manufactured separately and assembled by press-fitting, bonding, screwing, or the like. In this way, the resistor 22, the capacitor 23, the diode 24, and the like can be mounted on the plate-shaped portion 11a. The light emitting element 21 can be mounted on the plate-shaped portion 11b. Therefore, mounting of these circuit components becomes easy. When assembling the portion 11a and the portion 11b, the wiring pattern provided in the portion 11a and the wiring pattern provided in the portion 11b can be electrically connected by soldering or the like.

The configuration of the light distribution control unit 31 can be the same as the configuration of the light distribution control unit 30 described above. That is, the light distribution control unit 31 can have an optical element 31a and a holding unit 31b.
When the light distribution control unit 31 is attached to the portion 11b of the base portion 11, the light emitting element 21 is housed in the space 31a1 inside the optical element 31a. At least a part of the light emitted from the light emitting element 21 is incident on the inner wall of the optical element 31a. As shown in FIG. 5, the optical element 31a can be provided so as to cover the light emitting element 21.

A part of the optical element 31a can have a higher light transmittance than the other regions. The region having high light transmittance can be, for example, a region including the opening 31a2 or a material having high transmittance (for example, a transparent material). As shown in FIG. 5, the region having high light transmittance can be the opening 31a2. The opening 31a2 can be a hole.

If a region having a high light transmittance is provided, the light emitted from the light emitting element 21 in a direction substantially perpendicular to the surface 11b1 of the portion 11b is emitted to the outside through the region having a high light transmittance. Can be done. Therefore, the light irradiation direction can be changed by appropriately changing the position and shape of the region having high light transmittance.
Furthermore, by appropriately changing the size and number of regions having high light transmittance, the intensity of the irradiated light can be adjusted and the area of the irradiated region can be adjusted.

Further, if the region having high light transmittance is the opening 31a2, the transmitted light is not attenuated, so that the utilization efficiency of the light emitted from the light emitting element 21 can be improved. Further, since the space 31a1 inside the optical element 31a is connected to the external space through the opening 31a2, it becomes easy to release the heat generated in the light emitting element 21 to the outside. Therefore, it becomes easy to suppress the temperature rise of the light emitting element 21.

The region other than the region where the light transmittance is high can be the same as in the case of the optical element 30a described above.

At least one holding portion 31b can be provided. The light distribution control unit 31 illustrated in FIG. 5 is provided with two holding units 31b. Similar to the case of the holding portion 30b described above, the holding portion 31b can have a convex portion and a protrusion. The convex portion and the protrusion of the holding portion 31b can be the same as the convex portion 30b1 and the protrusion 30b2 of the holding portion 30b. When a plurality of holding portions 31b are provided, the cross-sectional shape of the convex portion may be a circle, a polygon, or the like.

When the light distribution control unit 31 is attached to the portion 11b, the holding portion 31b is inserted into the hole 11b2 that penetrates the portion 11b in the thickness direction. The convex portion is provided inside the hole 11b2, and the protrusion comes into contact with the surface 11b3 of the portion 11b, so that the light distribution control unit 31 is held on the surface 11b1 of the portion 11b.

If the light distribution control unit 31 is provided, the same effect as that of the light distribution control unit 30 described above can be obtained.
That is, even if the required light irradiation direction changes, it is not necessary to change the base 11 provided with the light emitting circuit 20. That is, even when the required light irradiation direction is different depending on the application of the vehicle lighting device 1a, it is possible to standardize the base 11 on which the light emitting element 21 is provided.

In this case, a plurality of types of light distribution control units 31 are required to correspond to various light irradiation directions (various uses), but the light distribution control unit 31 is easily formed by using an injection molding method or the like. And the manufacturing cost is low. Therefore, the manufacturing cost does not increase significantly.
Further, when the holding portion 31b is provided, the light distribution control portion 31 can be attached to the base portion 11 simply by inserting the holding portion 31b into the hole 11b2. Therefore, it is possible to prevent the manufacturing process and work contents from becoming complicated.

FIG. 6A is a schematic perspective view for exemplifying the convex portion 30b1a according to another embodiment.
FIG. 6B is a cross-sectional view taken along the line AA of the convex portion 30b1a in FIG. 6A.
The cross-sectional shape of the convex portion 30b1 and the cross-sectional shape of the hole 10c illustrated in FIG. 1 are rectangular, but the cross-sectional shape of the convex portion and the cross-sectional shape of the hole may be a regular polygon. For example, as shown in FIG. 6B, the cross-sectional shape of the convex portion 30b1a and the cross-sectional shape of the hole 10c can be a regular hexagon. If the cross-sectional shape of the convex portion and the cross-sectional shape of the hole are regular polygons, the position of the light distribution control unit 30 in the rotation direction around the convex portion can be determined by appropriately selecting the direction in which the convex portion is inserted into the hole. You can choose. Therefore, even if the required light irradiation directions increase, the light distribution control unit 30 can be shared. In this case, if the number of angles of the regular polygon is increased, the light irradiation direction can be selected in more detail.

FIG. 7A is a schematic perspective view for exemplifying the light distribution control unit 32 according to another embodiment.
FIG. 7B is a schematic plan view of the light distribution control unit 32.
As shown in FIGS. 7A and 7B, the light distribution control unit 32 can include an optical element 30a, a convex portion 30b1b, a protrusion 30b2, and a positioning portion 32a.

The convex portion 30b1b can be the same as the convex portion 30b1. However, the cross-sectional shape of the convex portion 30b1b and the cross-sectional shape of the hole into which the convex portion 30b1b is inserted are circular.
The positioning portion 32a has a pin shape, and one end is provided at the end of the optical element 30a to which the convex portion 30b1b is connected. The positioning portion 32a is inserted into the holes provided in the base portion 10 and the portion 11b. If the positioning portion 32a is provided, even if the cross-sectional shape of the convex portion 30b1b is circular, it is possible to suppress the position of the light distribution control unit 32 from being displaced in the rotational direction around the convex portion 30b1b. ..

Further, the base portion 10 and the portion 11b can be provided with a plurality of holes into which the positioning portion 32a is inserted. The plurality of holes can be provided on the circumference centered on the center of the hole into which the convex portion 30b1b is inserted. In this way, the position of the light distribution control unit 32 in the rotation direction centered on the convex portion 30b1b can be selected by appropriately selecting the hole into which the positioning unit 32a is inserted. Therefore, even if the required light irradiation directions increase, the light distribution control unit 32 can be shared. In this case, if the number of holes is increased, the light irradiation direction can be selected in more detail.

(Vehicle lighting device set 200)
As described above, by appropriately changing the position and shape of the region having high light transmittance provided in the light distribution control unit (optical element), it is possible to correspond to different light irradiation directions. Therefore, even when the required light irradiation direction differs depending on the application of the vehicle lighting device, it is possible to standardize the base on which the light emitting element 21 is provided.

FIG. 8 is a schematic view for exemplifying the vehicle lighting device set 200 according to the present embodiment.
As illustrated in FIG. 8, the vehicle lighting device set 200 can have a base 10 provided with at least one light emitting element 21 and a plurality of types of light distribution control units (optical elements). A plurality of types of light distribution control units (optical elements) can accommodate the light emitting element 21 inside. In each of the plurality of types of light distribution control units (optical elements), some regions have higher light transmittance than other regions. At least one of the position, shape, number, and size of the region having high light transmittance is different for each of a plurality of types of light distribution control units (optical elements). Although two types of light distribution control units (optical elements) are illustrated in FIG. 8, there may be three or more types of light distribution control units (optical elements). Further, the form and configuration of the base portion and the light distribution control unit (optical element) are not limited to those illustrated.

With the vehicle lighting device set 200 according to the present embodiment, a desired vehicle lighting device can be configured by selecting an appropriate light distribution control unit according to the required light irradiation direction. .. As described above, since the base 10 provided with the light emitting circuit 20 can be shared, it is possible to reduce the manufacturing cost and the manufacturing time.

In this case, a plurality of types of light distribution control units are required to correspond to various light irradiation directions (various uses), but the light distribution control unit can be easily formed by using an injection molding method or the like. It can be done and the manufacturing cost is low. Therefore, the manufacturing cost does not increase significantly.
Further, when the holding portion is provided, the light distribution control portion can be attached to the base portion simply by inserting the holding portion into the hole. Therefore, it is possible to prevent the manufacturing process and work contents from becoming complicated.

(Vehicle lamp 100)
FIG. 9 is a schematic view for exemplifying the vehicle lamp 100 according to the present embodiment.
In the following, as an example, the case where one of the above-mentioned vehicle lighting devices 1 is provided will be illustrated, but at least one vehicle lighting device 1 may be provided. Further, at least one vehicle lighting device 1a may be provided.
As shown in FIG. 9, the vehicle lighting device 100 may be provided with a vehicle lighting device 1, a socket 101, a housing 102, and a cover 103.

As shown in FIG. 9, the socket 101 can be provided in the housing 102. The vehicle lighting device 1 can be mounted on the socket 101. The socket 101 can be formed from, for example, an insulating material such as resin.
Further, in FIG. 9, although the case where the socket 101 and the housing 102 are provided separately is illustrated, the socket 101 and the housing 102 may be integrally formed.

The socket 101 may be provided with a recess that opens at one end. A vehicle lighting device 1 (base 10) can be inserted into the recess. Further, inside the recess, a pair of socket terminals 101a corresponding to one voltage polarity (for example, plus) and a pair of socket terminals 101b corresponding to the other voltage polarity (for example, minus) can be provided. As described above, if the vehicle lighting device 1 is provided with a non-polar circuit, the mounting direction of the vehicle lighting device 1 (base 10) is not limited.

The pair of socket terminals 101a (101b) can be elastically deformed. When the base portion 10 is inserted into the recess, the socket terminals 101a and 101b can come into contact with the terminals 10a1b of the base portion 10, respectively. A power source or the like provided outside the vehicle lamp 100 can be electrically connected to the pair of socket terminals 101a (101b). A circuit board may be provided on at least one of the inside and the outside of the housing 102 so that the pair of socket terminals 101a (101b) and the power supply or the like are electrically connected via the circuit board.

The shape of the housing 102 can be, for example, a box shape in which one end side is open. The housing 102 can be formed of, for example, a resin that does not transmit light.
The cover 103 can be provided so as to close the opening of the housing 102. The cover 103 can be formed of a translucent resin or the like. The cover 103 may have a function such as a lens or may suppress glare. Further, the cover 103 can be provided on the housing 102 so as to be openable and closable, or can be provided on the housing 102 so as to be removable.

In addition, optical elements such as a reflector and a lens can be provided inside the housing 102.

As shown in FIG. 9, the light emitting element 21 mainly irradiates light in a direction perpendicular to the surface 10a of the base 10. As described above, the light incident on the inner wall of the light distribution control unit 30 (optical element 30a) is irradiated to the outside of the light distribution control unit 30 through the region (opening 30a2) having high light transmittance. .. Therefore, by selecting an appropriate light distribution control unit from a plurality of types of light distribution control units in which the positions and shapes of regions having high light transmittance are different from each other, it is possible to correspond to various light irradiation directions (various uses). can do.

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

1 Vehicle lighting device, 1a Vehicle lighting device, 10 base, 10a surface, 10b surface, 20 light emitting circuit, 21 light emitting element, 30 light distribution control unit, 30a optical element, 30a1 space, 30a2 opening, 30b holding part, 30b1 Convex part, 31 Light distribution control part, 11 base part, 11a part, 11b part, 31b holding part, 32 light distribution control part, 100 vehicle lighting equipment, 101 socket, 101a socket terminal, 101b socket terminal, 200 vehicle lighting device set

Claims (6)

With a base provided with at least one light emitting element;
With an optical element provided at the base and capable of accommodating the light emitting element inside;
Equipped with
A vehicle lighting device in which a part of the optical element has a higher light transmittance than the other regions. The vehicle lighting device according to claim 1, wherein the region having high light transmittance is an opening. The vehicle lighting device according to claim 1 or 2, wherein one end is provided on the optical element and the other end is further provided with a convex portion provided inside the base portion. The base is
With the first part that has a plate shape;
With a second portion having a plate shape and provided on one end face of the first portion;
Have,
The vehicle lighting according to any one of claims 1 to 3, wherein the light emitting element and the optical element are provided on a surface of the second portion opposite to the first portion side. Device. With a base provided with at least one light emitting element;
With multiple types of optical elements that can store the light emitting element inside;
Equipped with
In each of the plurality of types of optical elements, some regions have higher light transmittance than other regions.
A vehicle lighting device set in which at least one of the positions, shapes, numbers, and sizes of the regions having high light transmittance is different for each of the plurality of types of optical elements. With the vehicle lighting device according to any one of claims 1 to 4.
With a socket provided in the vehicle lighting device into which a base can be inserted;
Vehicle lighting fixtures equipped with.

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