JP2023181066A - Optical element, vehicular illumination device, and vehicular lighting fixture - Google Patents

Abstract

To provide an optical element, a vehicular illumination device, and a vehicular lighting fixture whose light distribution characteristics and light emitting region are equivalent to the light distribution characteristics and the light emitting region of a wedge-base electric bulb.SOLUTION: An optical element has a concave part having a dimension in a direction orthogonal to a central axis of the optical element gradually decreasing toward a light emitting element side. An end part on the light emitting element side in a first region of an inner wall of the concave part is a flat surface orthogonal to the central axis of the optical element. A second region is provided between an opening of the concave part and the first region, and includes a curved surface protruding toward the outside of the optical element. A third region is provided between the opening of the concave part and the second region, and includes a curved surface protruding toward the outside of the optical element. A fourth region is provided between the opening of the concave part and the third region, and includes a curved surface protruding toward the outside of the optical element.SELECTED DRAWING: Figure 5

Description

Embodiments of the present invention relate to optical elements, vehicular lighting devices, and vehicular lamps.

Wedge-based light bulbs without caps are used as vehicle lighting devices. Wedge base light bulbs are incandescent light bulbs. Therefore, from the viewpoint of power saving and longevity, wedge-based light bulbs are increasingly being replaced with vehicle lighting devices equipped with light-emitting elements such as light-emitting diodes.

However, the light distribution characteristics and light emitting area of the light emitting element are different from those of the wedge base light bulb. Therefore, when replacing a wedge-based light bulb with a vehicle lighting system equipped with a light-emitting element, the light distribution characteristics and light-emitting area of the vehicle lighting system equipped with a light-emitting element are different from those of the wedge-based light bulb. It is preferable to make them equal.

Therefore, it has been desired to develop a technology whose light distribution characteristics and light emitting area are equivalent to those of a wedge-based light bulb.

Japanese Patent Application Publication No. 2013-105652

The problem to be solved by the present invention is to provide an optical element, a vehicle lighting device, and a vehicle lamp whose light distribution characteristics and light emitting area are equivalent to those of a wedge-based light bulb. .

The optical element according to the embodiment is an optical element provided in a vehicle lighting device including a light emitting element. The optical element is provided on the light emitting side of the light emitting element, and is provided on an end surface opposite to the light emitting element side, and the dimension in the direction perpendicular to the central axis of the optical element is on the light emitting element side. It has a concave portion that gradually decreases as it increases. The inner wall of the recess has a first region, a second region, a third region, and a fourth region arranged in a direction along the central axis of the optical element. The first region is located on the light emitting element side, and an end of the first region on the light emitting element side is a flat surface perpendicular to the central axis of the optical element. The second region is provided between the opening of the recess and the first region, and includes a curved surface that projects toward the outside of the optical element. The third region is provided between the opening of the recess and the second region, and includes a curved surface that projects toward the outside of the optical element. The fourth region is provided between the opening of the recess and the third region, and includes a curved surface that projects toward the outside of the optical element.

According to embodiments of the present invention, it is possible to provide an optical element, a vehicular lighting device, and a vehicular lamp whose light distribution characteristics and light emitting area are equivalent to those of a wedge-based light bulb.

1 is a schematic exploded view for illustrating a vehicle lighting device according to an embodiment. FIG. FIG. 3 is a schematic perspective view for illustrating a light emitting section and a connecting section. FIG. 3 is a schematic diagram of an optical element viewed from the Z direction. FIG. 3 is a schematic diagram of an optical element viewed from the Y direction. 5 is a sectional view taken along line AA of the optical element in FIG. 4. FIG. FIG. 3 is a schematic diagram of an optical element viewed from the X direction. 7 is a sectional view taken along line BB of the optical element in FIG. 6. FIG. 5 is a sectional view taken along line CC of the optical element in FIG. 4. FIG. FIG. 7 is a schematic perspective view for illustrating an optical element according to another embodiment. FIG. 3 is a schematic diagram of an optical element viewed from the Z direction. FIG. 3 is a schematic diagram of an optical element viewed from the Y direction. 12 is a sectional view taken along the line DD of the optical element in FIG. 11. FIG. FIG. 3 is a schematic diagram of an optical element viewed from the X direction. 14 is a sectional view taken along line EE of the optical element in FIG. 13. FIG. 14 is a sectional view taken along line FF of the optical element in FIG. 13. FIG. 12 is a sectional view taken along line GG of the optical element in FIG. 11. FIG. FIG. 7 is a schematic perspective view for illustrating a vehicle lighting device according to another embodiment. FIG. 18 is a schematic perspective view of the vehicle lighting device in FIG. 17 viewed from the opposite side in the Y direction. (a) to (c) are diagrams for illustrating the effects of optical elements. 1 is a schematic diagram illustrating a vehicle lamp according to an embodiment of the present invention; FIG.

Hereinafter, embodiments will be illustrated with reference to the drawings. Note that in each drawing, similar components are denoted by the same reference numerals, and detailed explanations are omitted as appropriate.
Further, arrows X, Y, and Z in each figure represent three directions orthogonal to each other. For example, the Z direction is a direction along the central axis of the vehicle lighting device. The X direction is the width direction of the portion of the vehicle lighting device that is attached to the socket terminal of the socket. The Y direction is the thickness direction of the portion of the vehicle lighting device that is attached to the socket terminal of the socket.

(Optical elements and vehicle lighting devices)
The vehicular lighting device 1 according to the present embodiment is a vehicular lighting device that can be attached to socket terminals 101a and 101b of a socket 101 provided in a vehicular lamp 100. Examples of the vehicle lighting device 1 include those used for room lamps, meter lamps, reading lights, brake lights, direction indicator lights, tail lights, etc. provided in automobiles, railway vehicles, and the like. However, the uses of the vehicle lighting device 1 are not limited to these.

FIG. 1 is a schematic exploded view for illustrating a vehicle lighting device 1 according to the present embodiment.
FIG. 2 is a schematic perspective view illustrating the light emitting section 10 and the connecting section 20.
Note that FIG. 2 shows a case where the light emitting section 10 and the connecting section 20 in FIG. 1 are viewed from the opposite side in the Y direction.

As shown in FIGS. 1 and 2, the vehicle lighting device 1 is provided with, for example, a light emitting section 10, a connecting section 20, an optical element 30, a housing 40, and a terminal 50.

As shown in FIGS. 1 and 2, the light emitting unit 10 includes, for example, a substrate 11 (corresponding to an example of a first substrate) and a light emitting element 12.
The substrate 11 is provided, for example, at the end of the storage section 41 of the housing 40 on the opposite side to the insertion section 42 side. The substrate 11 has a plate shape, for example, and has a surface 11a (corresponding to an example of a first surface) and a surface 11b (corresponding to an example of a second surface) opposing the surface 11a. The planar shape of the substrate 11 is, for example, a part of a circle including the center point. However, the planar shape of the substrate 11 is not limited to that illustrated. The planar shape of the substrate 11 may be, for example, a polygon.

Substrate 11 can be formed from an insulating material. The substrate 11 is made of, for example, an inorganic material such as ceramics (eg, aluminum oxide or aluminum nitride), or an organic material such as paper phenol or glass epoxy. Further, the substrate 11 may be, for example, a metal core substrate in which the surface of a metal plate is coated with an insulating material.

When the light emitting element 12 generates a large amount of heat, it is preferable to form the substrate 11 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, highly thermally conductive resins, and metal core substrates. The highly thermally conductive resin is, for example, a resin such as PET (Polyethylene terephthalate) or nylon mixed with a filler such as aluminum oxide.

The thickness of the substrate 11 is, for example, about 0.5 mm to 3.0 mm. However, the thickness of the substrate 11 is not limited to that illustrated, and can be changed as appropriate.

A wiring pattern 11c is provided on the surface 11a of the substrate 11. The wiring pattern 11c has, for example, a mounting pad. The light emitting element 12 is electrically connected to the mounting pad. The wiring pattern 11c is made of, for example, a low resistance metal such as copper, aluminum, or silver.

At least one light emitting element 12 can be provided on the surface 11a of the substrate 11. The center of the light emitting surface of the light emitting element 12 overlaps with the central axis 1a of the vehicle lighting device 1.
The light emitting device 12 can be, for example, a light emitting diode, a laser diode, an organic light emitting diode, or the like.

The light emitting element 12 can be, for example, a surface mount type light emitting element such as a PLCC (Plastic Leaded Chip Carrier) type. Further, the light emitting element 12 can also be a light emitting element having a bullet-shaped lead wire, for example. Note that the light emitting element 12 illustrated in FIGS. 1 and 2 is a surface-mounted light emitting element.

Further, the light emitting element 12 can also be a chip-shaped light emitting element. The chip-shaped light emitting element can be mounted using, for example, COB (Chip On Board). In this case, the chip-shaped light-emitting element, the wiring that electrically connects the chip-shaped light-emitting element and the wiring pattern 11c, the frame-shaped member surrounding the chip-shaped light-emitting element and the wiring, and the inside of the frame-shaped member A sealing portion that covers the chip-shaped light emitting element and wiring can be provided on the surface 11a of the substrate 11. Further, the sealing portion can contain a phosphor. The phosphor can be, for example, a YAG-based phosphor (yttrium-aluminum-garnet-based phosphor). Note that the type of phosphor is not limited to those illustrated. The type of phosphor can be changed as appropriate to obtain a desired emission color depending on the use of the vehicle lighting device 1 and the like.
The light emitting surface of the light emitting element 12 can be substantially parallel to the surface 11a of the substrate 11.

The connection section 20 includes, for example, a substrate 21 (corresponding to an example of a second substrate) and a circuit component 22.
The substrate 21 has a wiring pattern 21e electrically connected to the light emitting element 12, and is provided inside the housing 40.

The substrate 21 has a plate shape, for example, and extends in a direction substantially perpendicular to the surface 11b of the substrate 11. The board 21 has, for example, a mounting section 21a and a mounting section 21b. The mounting part 21a and the mounting part 21b can be formed integrally.

When viewed from the Y direction, the mounting portion 21a may have a rectangular shape, for example. One end of the mounting portion 21a is provided on the surface 11b of the substrate 11. For example, one end of the mounting portion 21a can be bonded to the surface 11b of the substrate 11. Alternatively, a convex portion may be provided at one end of the mounting portion 21a, and a hole, a recess, a groove, etc., into which the convex portion of the mounting portion 21a is fitted may be provided on the surface 11b of the substrate 11.

The width dimension of the mounting portion 21a can be, for example, approximately 5.0 mm to 15.0 mm. However, the width dimension of the mounting portion 21a can be changed as appropriate depending on the size of the board 11, the number and size of the circuit components 22, etc. Note that the width dimension of the mounting portion 21a is the dimension of the mounting portion 21a in the X direction.
The thickness of the mounting portion 21a can be, for example, approximately 0.1 mm to 3.0 mm. Note that the thickness of the mounting portion 21a is the dimension of the mounting portion 21a in the Y direction.

When viewed from the Y direction, the shape of the mounting portion 21b can be, for example, a quadrangle. One end of the mounting portion 21b is provided at the end of the mounting portion 21a on the opposite side to the substrate 11 side. The mounting portion 21b extends in the Z direction from the end of the mounting portion 21a on the opposite side to the substrate 11 side.

The width dimension of the mounting section 21b is smaller than the width dimension of the mounting section 21a. The thickness of the mounting portion 21b can be the same as the thickness of the mounting portion 21a.
The mounting portion 21b can be provided, for example, at the center of the mounting portion 21a in the X direction.

The material of the substrate 21 (the mounting portion 21a, the mounting portion 21b) can be, for example, the same as the material of the substrate 11 described above. Heat generated in the light emitting element 12 is transmitted to the substrate 21 via the substrate 11, for example, and is emitted from the substrate 21 to the outside via the terminals 50 and the like. Therefore, in consideration of suppressing the temperature rise of the light emitting element 12, it is preferable to form the substrate 21 using a material with high thermal conductivity. Examples of materials with high thermal conductivity include ceramics such as aluminum oxide and aluminum nitride, highly thermally conductive resins, and metal core substrates. In this case, the material of the substrate 21 may be the same as the material of the substrate 11, or may be different.

A wiring pattern 21e can be provided on the surface 21c and the surface 21d of the substrate 21 (mounting section 21a, mounting section 21b). The wiring pattern 21e provided on the surface 21c and the wiring pattern 21e provided on the surface 21d can be electrically connected, for example, via a conductive via. The wiring pattern 21e is made of, for example, a low resistance metal such as copper, aluminum, or silver. The wiring pattern 21e is electrically connected to the wiring pattern 11c provided on the substrate 11 via the connecting portion 21e2. The connecting portion 21e2 may be formed, for example, by soldering.

The circuit component 22 is mounted on the wiring pattern 21e provided in the mounting portion 21a. The wiring pattern 21e is electrically connected to a pair of connection pads 21e1 provided on the mounting portion 21b. That is, the pair of connection pads 21e1 are provided on the substrate 21 (mounting portion 21b) and electrically connected to the light emitting element 12. The connection pad 21e1 can be formed integrally with the wiring pattern 21e, for example. The connection pads 21e1 are provided on the surface 21c and the surface 21d of the substrate 21 (mounting portion 21b). Each of the pair of connection pads 21e1 is electrically connected to socket terminals 101a and 101b provided in the socket 101 via the terminal 50. By electrically connecting the socket terminal 101a provided on the socket 101 to one of the connection pads 21e1 via the terminal 50, the socket terminal 101a is connected to the light emitting element 12 via the wiring pattern 21e and the wiring pattern 11c. It can be electrically connected to an electrode of one polarity. Also, by electrically connecting the socket terminal 101b to the other connection pad 21e1 via the terminal 50, the socket terminal 101b can be connected to the other polarity of the light emitting element 12 via the wiring pattern 21e and the wiring pattern 11c. It can be electrically connected to an electrode.

Note that although FIGS. 1 and 2 illustrate the case where the circuit components 22 are provided on both sides of the mounting section 21a, the circuit components 22 may be provided on one surface of the mounting section 21a. . However, if the circuit components 22 are provided on both sides of the mounting section 21a, the mounting section 21a can be made smaller, and by extension, the vehicle lighting device 1 can be made smaller.

The circuit component 22 can be a passive device or an active device used to configure a light emitting circuit having the light emitting device 12.
The circuit components 22 can be, for example, a diode 22a, a resistor 22b, a capacitor 22c, etc.
However, the types of circuit components 22 are not limited to those illustrated, and can be changed as appropriate depending on the configuration of the light emitting circuit having the light emitting element 12. For example, the circuit component 22 may be a positive characteristic thermistor, a negative characteristic thermistor, a Zener diode, an inductor, a surge absorber, a varistor, a transistor such as an FET or a bipolar transistor, an integrated circuit, an arithmetic element, etc. in addition to those described above. . The integrated circuit may include, for example, at least one of a blinking circuit, a constant current circuit, and a lighting circuit (drive circuit).

Here, the light emitting element 12 such as a light emitting diode has polarity. Therefore, a diode can be provided to prevent reverse voltage from being applied to the light emitting element 12. In this case, if there is no directionality when attaching the vehicle illumination device 1 to the socket 101 of the vehicle lamp 100, the installation work of the vehicle illumination device 1 becomes easier.

For example, if a bridge circuit (bridge diode) is configured using four diodes, the vehicle lighting device 1 can be provided with a non-polar circuit. The diode 22a illustrated in FIG. 2 is a so-called two-element diode. If the diode 22a is a two-element diode, a bridge circuit can be constructed using the two diodes 22a, so the mounting area can be reduced.

The resistor 22b can be, for example, a surface-mounted resistor, a resistor with a lead wire (metal oxide film resistor), a film resistor formed using a screen printing method, or the like. Note that the resistor 22b illustrated in FIG. 1 is a surface-mounted resistor. By using a surface-mounted resistor, the mounting area can be reduced.

Here, since there are variations in the forward voltage characteristics of the light emitting element 12, when the voltage applied between the anode terminal and the ground terminal is constant, the brightness (luminous flux, luminance) of the light emitted from the light emitting element 12 is , luminous intensity, illuminance). Therefore, the value of the current flowing through the light emitting element 12 is kept within a predetermined range by the resistor 22b connected in series with the light emitting element 12 so that the brightness of the light emitted from the light emitting element 12 is within a predetermined range. do it like this. In this case, by changing the resistance value of the resistor 22b, the value of the current flowing through the light emitting element 12 can be made to fall within a predetermined range.

For example, if the resistor 22b is a surface-mounted resistor or a resistor with a lead wire, the resistor 22b having an appropriate resistance value is selected according to the forward voltage characteristics of the light emitting element 12. For example, if the resistor 22b is a film resistor, the resistance value can be increased by removing a portion of the film resistor.

Further, the resistor 22b can also have the role of preventing excessive current from flowing into the light emitting element 12.
The number, size, arrangement, etc. of the resistors 22b are not limited to those illustrated, and can be changed as appropriate depending on the number, specifications, etc. of the light emitting elements 12.

The capacitor 22c can be provided, for example, for noise countermeasures and voltage smoothing. The capacitor 22c can be, for example, a surface-mounted capacitor 22c. By using a surface-mounted capacitor 22c, the mounting area can be reduced.

Furthermore, for example, at least a portion of the circuit component 22 may be provided on the substrate 11.
Furthermore, for example, at least a portion of the circuit component 22 may be provided in the casing 102 of the vehicle lamp 100 to which the vehicle lighting device 1 is mounted. In this way, 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 22 is provided in the vehicle lighting device 1, it becomes easy to protect the vehicle lighting device 1 and make it multi-functional.

As shown in FIG. 1, the optical element 30 can be provided to cover the light emitting side of the light emitting section 10 (light emitting element 12). For example, the optical element 30 can be provided to cover the surface 11a of the substrate 11. For example, a pair of attachment parts 31 can be provided at the end of the optical element 30 on the light emitting part 10 side. The optical element 30 is removably attached to the housing 40 using a pair of attachment parts 31. The optical element 30 can be formed from a translucent resin such as polycarbonate or acrylic, for example.
The optical element 30 protects the light emitting section 10 (light emitting element 12) and controls the light distribution characteristics and light emitting area of the light emitted from the light emitting element 12.
Note that details regarding the optical element 30 will be described later.

The housing 40 has a storage section 41 and an insertion section 42. The storage section 41 and the insertion section 42 can be formed integrally. The housing 40 (accommodating part 41, insertion part 42) can be formed from an insulating material such as resin, for example. The housing 40 can be formed, for example, by injection molding.

The storage section 41 has a cylindrical shape and is open at one end. The light emitting section 10 (substrate 11) and the connecting section 20 (substrate 21) are housed inside the storage section 41. The substrate 11 can be provided so as to close the opening of the storage section 41. In this way, it is possible to prevent dirt and the like from entering the inside of the storage section 41. Further, the posture and position of the substrate 21 can be stabilized. Therefore, it is possible to suppress excessive force from acting on the terminal 50.

The insertion portion 42 has a plate shape and is provided at the end of the storage portion 41 on the opposite side to the opening side. The insertion portion 42 is attached to the socket terminals 101a and 101b. A space is provided inside the insertion portion 42 into which the mounting portion 21b of the board 21 is inserted. When viewed from the Y direction, the shape of the insertion portion 42 can be, for example, a square.

As shown in FIG. 1, a pair of terminals 50 can be provided. The pair of terminals 50 are provided at the center of the insertion portion 42 in the X direction (width direction) in the thickness direction of the insertion portion 42, with the central axis 1a of the vehicle lighting device 1 interposed therebetween. The pair of terminals 50 are electrically connected to the wiring pattern 21e (connection pad 21e1) of the substrate 21.
For example, one end side of the pair of terminals 50 is electrically connected to the connection pad 21e1 inside the housing 40. For example, the other end side of the pair of terminals 50 is provided on the surfaces 42a and 42b in the thickness direction of the insertion portion 42 outside the housing 40.

The terminal 50 includes, for example, a first contact portion 51, a second contact portion 52, and a connection portion 53. The second contact portion 52 faces the first contact portion 51 . The first contact portion 51 and the second contact portion 52 extend in the Z direction. One end of the connecting portion 53 is connected to the first contact portion 51 , and the other end of the connecting portion 53 is connected to the second contact portion 52 .

The first contact portion 51, the second contact portion 52, and the connection portion 53 have a plate shape and are integrally formed. Terminal 50 is formed from a conductive material. The terminal 50 is made of metal such as copper alloy or stainless steel, for example.

The first contact portion 51 is provided inside the insertion portion 42 . The first contact portion 51 is electrically connected to the connection pad 21e1 provided on the mounting portion 21b. For example, the first contact portion 51 can be bonded to the connection pad 21e1 using a conductive material. The conductive material is, for example, solder or conductive adhesive.
The second contact portion 52 is provided on the surfaces 42a and 42b of the insertion portion 42. The second contact portion 52 can be brought into contact with the socket terminals 101a, 101b.

The terminal 50 can be formed, for example, as follows.
First, a strip-shaped conductive member is bonded to the connection pad 21e1 using a conductive material. Next, the connecting portion 20 to which the strip-shaped conductive member is joined is installed inside the housing 40 (insertion portion 42). Subsequently, the strip-shaped conductive member is bent to form a terminal 50 having a first contact portion 51, a second contact portion 52, and a connecting portion 53. Note that the terminal 50 shown in FIG. 1 represents the terminal 50 after being bent.

Alternatively, the terminal 50 may be formed by bending a strip-shaped conductive member, and the formed terminal 50 may be inserted into the insertion portion 42. Then, for example, a paste-like conductive material is applied to the connection pad 21e1 of the mounting part 21b, the connection part 20 is mounted inside the housing 40 to which the terminal 50 is attached, and the paste-like conductive material is hardened. The first contact portion 51 and the connection pad 21e1 can also be bonded together.

If the first contact portion 51 and the connection pad 21e1 are bonded, the electrical connection between the first contact portion 51 and the connection pad 21e1 is maintained even if vibrations due to driving are applied. be able to. Further, it is possible to prevent the light emitting section 10 and the connecting section 20 from falling off from the housing 40.

Next, the optical element 30 will be further explained.
Wedge base light bulbs are incandescent light bulbs that emit light in almost all directions. On the other hand, the light emitting element 12 mainly emits light forward. Therefore, the light distribution characteristics and light emitting area of the light emitting element 12 are different from the light distribution characteristics and light emitting area of the wedge base light bulb. For example, in the case of the light emitting element 12, the luminous intensity is high at the front (polar angle 0° to 50°), and the luminous intensity is extremely low at the rear (polar angle 90° to 100°).

When replacing the wedge base light bulb with the vehicle lighting device 1 equipped with the light emitting element 12, the light distribution characteristics and light emitting area of the vehicle lighting device 1 equipped with the light emitting element 12 are the same as the light distribution characteristics and light emitting area of the wedge base light bulb. It is preferable to make them equal.
Therefore, an optical element 30 is provided on the light emitting side of the light emitting element 12. The optical element 30 emits a part of the incident light in a direction intersecting the central axis 1a of the vehicle illumination device 1.
FIG. 3 is a schematic diagram of the optical element 30 viewed from the Z direction.
FIG. 4 is a schematic diagram of the optical element 30 viewed from the Y direction.
FIG. 5 is a sectional view taken along line AA of the optical element 30 in FIG.
FIG. 6 is a schematic diagram of the optical element 30 viewed from the X direction.
FIG. 7 is a sectional view taken along line BB of the optical element 30 in FIG.
FIG. 8 is a sectional view taken along line CC of the optical element 30 in FIG.

As shown in FIG. 1, the appearance of the optical element 30 can be, for example, approximately cylindrical. For example, the central axis 30a of the optical element 30 can be made to substantially overlap the central axis 1a of the vehicle lighting device 1.
As shown in FIGS. 3, 5, and 7, a recess 30b1 is provided in the end surface 30b of the optical element 30 on the opposite side to the light emitting element 12 side. The central axis of the recessed portion 30b1 overlaps with the central axis 30a of the optical element 30. The dimension of the recessed portion 30b1 in the direction orthogonal to the central axis 30a gradually decreases toward the light emitting element 12 side.

Further, the inner wall of the recess 30b1 includes, for example, a region 30b1a (corresponding to an example of a first region), a region 30b1b (corresponding to an example of a second region), and a region 30b1c (corresponding to a third region) arranged in the Z direction. (corresponding to an example of the fourth region), and a region 30b1d (corresponding to an example of a fourth region).
The region 30b1a is located on the light emitting element 12 side (on the bottom side of the recess 30b1). The end of the region 30b1a on the light emitting element 12 side can be a flat surface perpendicular to the central axis 30a. The side surface of the region 30b1a is, for example, a curved surface (for example, a part of a spherical surface) that protrudes toward the inside of the optical element 30.
The region 30b1b is located between the opening of the recess 30b1 and the region 30b1a (on the opening side of the region 30b1a). The region 30b1b is, for example, a curved surface that projects toward the outside of the optical element 30.
The region 30b1c is located between the opening of the recess 30b1 and the region 30b1b (on the opening side of the region 30b1b). The region 30b1c is, for example, a curved surface that projects toward the outside of the optical element 30.
The region 30b1d is located between the opening of the recess 30b1 and the region 30b1c (on the opening side of the region 30b1c). The region 30b1d is, for example, a curved surface that projects toward the outside of the optical element 30.
Further, the radius of curvature of the curved surface of the region 30b1d is larger than the radius of curvature of the curved surface of the region 30b1c. The radius of curvature of the curved surface of the region 30b1c is larger than the radius of curvature of the curved surface of the region 30b1b.

Further, as shown in FIGS. 3, 5, 7, and 8, a recess 30b4 is provided on the inner wall of the recess 30b1. The recessed portion 30b4 extends, for example, in the X direction. The shape of the recess 30b4 when viewed from the Z direction can be rectangular.

As shown in FIGS. 3, 4, and 6, a pair of regions 30b3 in which a plurality of recesses 30b2 are provided is provided at the periphery of the end surface 30b. The pair of regions 30b3 are provided at positions that are point symmetrical about the central axis 30a. The central angle of the region 30b3 can be, for example, 100°.

As shown in FIGS. 4, 5, 6, and 8, a pair of recesses 30c1 are provided on the side surface 30c of the optical element 30. The pair of recesses 30c1 are provided at positions that are symmetrical about the central axis 30a.
Further, as shown in FIG. 4, the rotational position of the region 30b3 provided with the plurality of recesses 30b2 about the central axis 30a of the optical element 30 is the same as the rotational position of the recess 30c1. Can be done. That is, in the Z direction, a region 30b3 (a plurality of recesses 30b2) can be provided above the recess 30c1 (on the opening side of the recess 30b1).

As shown in FIG. 8, a surface 30c1a of the recessed portion 30c1 on the central axis 30a side can be a curved surface that projects outward. The surface 30c1a can be, for example, a part of a cylindrical surface. The center 30c1b of the radius of curvature of the curved surface 30c1a is provided at a position that does not overlap with the central axis 30a. For example, the center 30c1b is provided at a position outwardly away from the central axis 30a.
Moreover, unevenness for diffusing light can be provided on the surface of the surface 30c1a. The unevenness can be formed by, for example, knurling.

As shown in FIGS. 4, 5, and 6, inside the recess 30c1, below the surface 30c1a (on the side opposite to the opening side of the recess 30b1), there are a plurality of concave curved surfaces lined up along the surface 30c1a. 30c1c is provided. The end of the concave curved surface 30c1c on the side of the surface 30c1a is inclined in a direction toward the central axis 30a.

Next, an optical element 130 according to another embodiment will be illustrated.
The optical element 130, like the optical element 30 illustrated in FIG. 1, can be provided so as to cover the light emission side of the light emitting section 10 (light emitting element 12). For example, the optical element 130 can be provided to cover the surface 11a of the substrate 11. For example, a pair of attachment parts 31 can be provided at the end of the optical element 130 on the light emitting part 10 side. The optical element 130 is removably attached to the housing 40 using a pair of attachment parts 31. The optical element 130 can be made of a translucent resin such as polycarbonate or acrylic, for example. The optical element 130 protects the light emitting unit 10 (light emitting element 12) and controls the light distribution characteristics and light emitting area of the light emitted from the light emitting element 12.

FIG. 9 is a schematic perspective view illustrating the optical element 130.
FIG. 10 is a schematic diagram of the optical element 130 viewed from the Z direction.
FIG. 11 is a schematic diagram of the optical element 130 viewed from the Y direction.
FIG. 12 is a sectional view taken along the line DD of the optical element 130 in FIG.
FIG. 13 is a schematic diagram of the optical element 130 viewed from the X direction.
FIG. 14 is a cross-sectional view of optical element 130 taken along line EE in FIG.
FIG. 15 is a cross-sectional view taken along line FF of optical element 130 in FIG.
FIG. 16 is a sectional view taken along line GG of the optical element 130 in FIG.

As shown in FIG. 9, the appearance of the optical element 130 can be, for example, approximately cylindrical. For example, the central axis 130a of the optical element 130 can be made to substantially overlap the central axis 1a of the vehicle lighting device 1.
As shown in FIGS. 9, 10, 12, and 14, a recess 130b1 (corresponding to an example of a first recess) is provided on the end surface 130b of the optical element 130 on the side opposite to the light emitting element 12. It is being The central axis of the recess 130b1 overlaps with the central axis 130a of the optical element 130. The dimension of the recess 130b1 in the direction orthogonal to the central axis 130a gradually decreases toward the light emitting element 12 side.

Further, like the recess 30b1 of the optical element 30 described above, the inner wall of the recess 130b1 has, for example, a region 30b1a, a region 30b1b, a region 30b1c, and a region 30b1d arranged in the Z direction.
Furthermore, similar to the recess 30b1 of the optical element 30 described above, a recess 30b4 is provided on the inner wall of the recess 130b1.

Similar to the end surface 30b of the optical element 30 described above, a pair of regions 30b3 in which a plurality of recesses 30b2 (corresponding to an example of a third recess) are provided are provided at the periphery of the end surface 130b. The pair of regions 30b3 are provided at positions that are point symmetrical about the central axis 130a. The central angle of the region 30b3 can be, for example, 100°.

Similar to the side surface 30c of the optical element 30 described above, the side surface 130c of the optical element 130 is provided with a pair of recesses 130c1 (corresponding to an example of a second recess). The pair of recesses 130c1 are provided at positions symmetrical about the central axis 130a.
Further, as shown in FIG. 11, the rotational position of the region 30b3 provided with the plurality of recesses 30b2 about the central axis 130a of the optical element 130 is the same as the rotational position of the recess 130c1. Can be done. That is, in the Z direction, a region 30b3 (a plurality of recesses 30b2) can be provided above the recess 130c1 (on the opening side of the recess 130b1).

As shown in FIG. 16, a surface 30c1a of the recess 130c1 on the central axis 130a side can be a curved surface that projects outward. The surface 30c1a can be, for example, a part of a cylindrical surface. The center 30c1b of the radius of curvature of the curved surface 30c1a is provided at a position that does not overlap with the central axis 130a. For example, the center 30c1b is provided at a position outwardly away from the central axis 130a.
Moreover, unevenness for diffusing light can be provided on the surface of the surface 30c1a. The unevenness can be formed by, for example, knurling.

As shown in FIG. 9, FIG. 11, FIG. 12, FIG. 13, and FIG. A portion 130c1c may be provided. As shown in FIG. 9, FIG. 11, FIG. 12, FIG. 13, and FIG. 15, when providing a plurality of convex portions 130c1c, the plurality of convex portions 130c1c can be provided side by side in the Z direction.

12, FIG. 13, and FIG. 15, the tip of the convex portion 130c1c does not protrude to the outside of the side surface 130c of the optical element 130. It is also possible to have a configuration in which it is positioned or a configuration in which it protrudes. When a plurality of protrusions 130c1c are provided, the positions of the tips of the protrusions 130c1c may be the same or different. In this case, the light distribution characteristics and light emitting area of the light emitted from the light emitting element 12 can also be controlled by the positions of the tips of the plurality of convex parts 130c1c. For example, as shown in FIGS. 12 and 13, the tips of the plurality of convex portions 130c1c are positioned closer to the central axis 130a of the optical element 130 as the convex portions 130c1c are provided upward (on the opening side of the recessed portion 30b1). You can make it like this. In this way, it becomes easy to set the light distribution characteristics and light emitting area of the light emitted from the light emitting element 12 within a predetermined range.

As shown in FIG. 15, the shape of the convex portion 130c1c when viewed from the Z direction can be a part of a ring centered on the central axis 130a of the optical element 130.
As shown in FIGS. 12 and 13, the dimensions of the convex portion 130c1c in the Z direction gradually increase from the tip side toward the central axis 130a side of the optical element 130. Furthermore, at least one of the two surfaces of the convex portion 130c1c in the Z direction may be an inclined surface. The inclined surface may be a flat surface, a convex curved surface, or a concave curved surface. Further, when a plurality of convex portions 130c1c are provided, the lowest convex portion 130c1c (on the side opposite to the opening side of the concave portion 130b1) may be provided on the inner wall of the concave portion 130c1 in the Z direction.

The number, size, shape, and position of the tip of the convex portions 130c1c can be changed as appropriate depending on the light distribution characteristics and light emitting area required of the vehicle lighting device 1. The number, size, shape, and position of the tip of the convex portions 130c1c can be appropriately determined, for example, by conducting experiments or simulations.

In the above, a case has been exemplified in which the optical element 30 (130) is provided in a vehicle lighting device including the light emitting section 10, the connecting section 20, the housing 40, and the terminal 50. However, the optical element 30 (130) can also be provided in a vehicle lighting device that does not include the housing 40 and the terminal 50.

FIG. 17 is a schematic perspective view illustrating a vehicle lighting device 61 according to another embodiment.
FIG. 18 is a schematic perspective view of the vehicle lighting device 61 in FIG. 17 viewed from the opposite side in the Y direction.
As shown in FIGS. 17 and 18, the vehicle lighting device 61 is provided with, for example, a light emitting section 10, a connecting section 62, and an optical element 30 (130).

The connection portion 62 includes, for example, a substrate 63 and a circuit component 22.
The substrate 63 has a plate shape, for example, and extends in a direction substantially perpendicular to the surface 11b of the substrate 11. When viewed from the Y direction, the shape of the substrate 63 can be, for example, a square. One end of the substrate 63 is provided on the surface 11b of the substrate 11. For example, one end of the substrate 63 can be adhered to the surface 11b of the substrate 11. Alternatively, a convex portion may be provided at one end of the substrate 63, and a hole, a recess, a groove, etc., into which the convex portion of the substrate 63 is fitted may be provided on the surface 11b of the substrate 11. The dimensions and material of the substrate 63 can be, for example, the same as those of the substrate 21 described above.

Similar to the substrate 21 described above, a wiring pattern 21e can be provided on the surface 63a and the surface 63b of the substrate 63. The wiring pattern 21e provided on the surface 63ac and the wiring pattern 21e provided on the surface 63b can be electrically connected, for example, via a conductive via. The wiring pattern 21e is electrically connected to the wiring pattern 11c provided on the substrate 11 via the connecting portion 21e2. The connecting portion 21e2 may be formed, for example, by soldering.

Similar to the substrate 21 described above, circuit components 22 are mounted on the wiring pattern 21e. Although the circuit component 22 is provided on both sides of the substrate 63 as an example, the circuit component 22 may be provided on one surface of the substrate 63. However, if the circuit components 22 are provided on both sides of the board 63, the size of the board 63 and, by extension, the size of the vehicle lighting device 61 can be reduced.

Furthermore, similar to the substrate 21 described above, the wiring pattern 21e is electrically connected to a pair of connection pads 21e1 provided on the substrate 63. The pair of connection pads 21e1 can be formed integrally with the wiring pattern 21e, for example. The connection pads 21e1 are provided on the surface 63a and the surface 63b of the substrate 63. Each of the pair of connection pads 21e1 is directly electrically connected to socket terminals 101a and 101b provided on the socket 101.

The arrangement of the pair of connection pads 21e1 can be similar to that of the substrate 21 described above. For example, the pair of connection pads 21e1 are opposed to each other. The pair of connection pads 21e1 are provided at the center of the substrate 63 in the width direction (X direction) in the thickness direction (Y direction) of the substrate 63, sandwiching the central axis 61a of the vehicle lighting device 61. In the width direction (X direction) of the substrate 63, the connection pad 21e1 provided on the surface 63a is provided at the center of the surface 63a. In the width direction of the substrate 63, the connection pad 21e1 provided on the surface 63b is provided at the center of the surface 63b.

Further, in the width direction (X direction) of the substrate 63, a pair of connection pads 21e1 can be provided side by side on the surface 63a of the substrate 63. In this case, the pair of connection pads 21e1 can be provided at positions symmetrical about the center line in the width direction (X direction) of the substrate 63 as an axis of symmetry. The pair of connection pads 21e1 can be provided at the same position as the pair of lead wires provided on the wedge base light bulb. Although a case has been described in which the pair of connection pads 21e1 are provided on the surface 63a of the substrate 63, the pair of connection pads 21e1 can also be provided on the surface 63b of the substrate 63, or the pair of connection pads 21e1 can be provided on the surface 63a and surface 63b of the substrate 63. It can also be provided in

If the pair of connection pads 21e1 are provided at the same position as the pair of lead wires provided on the wedge-based light bulb, the vehicle lighting device 61 can be attached to the socket to which the wedge-base bulb is attached. In other words, the socket can be used for multiple purposes.

On the other hand, a lighting circuit for a wedge-based light bulb and a lighting circuit for a vehicle lighting device including a light emitting element have different configurations. Therefore, when a vehicle lighting device including a light emitting element is mistakenly attached to the socket of a wedge base light bulb, current may flow from the lighting circuit of the wedge base light bulb to the light emitting element, causing the light emitting element to malfunction.

In this case, in the vehicle lighting device 1 described above, the pair of terminals 50 are provided in the widthwise center of the insertion portion 42 in the thickness direction of the insertion portion 42, sandwiching the central axis 1a of the vehicle lighting device 1. It is being That is, the pair of terminals 50 are provided at different positions from the pair of lead wires provided on the wedge base light bulb.

Also, in the vehicle lighting device 61, if the pair of connection pads 21e1 are provided in the widthwise center of the substrate 63 in the thickness direction of the substrate 63, sandwiching the central axis 61a of the vehicle lighting device 61. , a pair of connection pads 21e1 are provided at different positions from a pair of lead wires provided on the wedge base light bulb.

If the pair of terminals 50 and the pair of connection pads 21e1 are provided at different positions from the pair of lead wires provided on the wedge base light bulb, the vehicle lighting device equipped with the light emitting element 12 can be attached to the socket of the wedge base light bulb. Even if the devices 1 and 61 are attached by mistake, it is possible to prevent current from flowing from the lighting circuit of the wedge base light bulb to the light emitting element 12. Therefore, failure of the light emitting element 12 can be suppressed.

FIGS. 19(a) to 19(c) are diagrams for illustrating the action of the optical element 30 (130). As shown in FIG. 19(a), light emitted from the light emitting element 12 toward the end of the region 30b1a of the recess 30b1 passes through the end of the region 30b1a and is emitted near the polar angle of 0°. do. Since the end portion of the region 30b1a is a flat surface, incident light can be efficiently transmitted therethrough. Furthermore, since the area of the end portion of the region 30b1a is small, it is possible to suppress an increase in the luminous intensity of the light emitted near the polar angle of 0°.

As shown in FIG. 19(b), light irradiated from the light emitting element 12 toward the region (region 30b1b, region 30b1c, and region 30b1d) on the inner wall of the recess 30b1 on the opposite side to the light emitting element 12 side is , and is reflected by the inner wall of the recessed portion 30b1, and is emitted in the vicinity of a polar angle of 45°. As described above, the radius of curvature of the curved surface of the region 30b1d is larger than the radius of curvature of the curved surface of the region 30b1c. The radius of curvature of the curved surface of the region 30b1c is larger than the radius of curvature of the curved surface of the region 30b1b. Therefore, the reflection directions of the light incident on each of the region 30b1b, the region 30b1c, and the region 30b1d can be aligned to some extent. As a result, the luminous intensity of light emitted in the vicinity of a polar angle of 45° can be increased.

As shown in FIG. 19(c), light emitted from the light emitting element 12 toward the area on the light emitting element 12 side (the side of the area 30b1a) of the inner wall of the recess 30b1 is reflected by the side of the area 30b1a. and enters the surface 30c1a of the recessed portion 30c1 (130c1). The light incident on the surface 30c1a of the recessed portion 30c1 (130c1) is emitted in the vicinity of a polar angle of 100°. At this time, the light is focused by the surface 30c1a. Therefore, the luminous intensity of light emitted near a polar angle of 100° can be increased.

If the optical element 30 (130) is provided, it is possible to efficiently irradiate light in the polar angle range of -100° to 100°, so that the light distribution characteristics and light emitting area of the vehicle illumination device 1 are The light distribution characteristics and light emitting area can be made to be equivalent to that of a wedge-based light bulb.

(vehicle lighting)
In one embodiment of the present invention, a vehicle lamp 100 including the vehicle lighting device 1 can be provided. The above description regarding the vehicle lighting device 1 and the modified example of the vehicle lighting device 1 (for example, the vehicle lighting device 61) can both be applied to the vehicle lamp 100.

FIG. 20 is a schematic diagram illustrating the vehicle lamp 100 according to the present embodiment.
In addition, although the case where one vehicle illuminating device 1 mentioned above is provided is illustrated below as an example, the at least one vehicle illuminating device 1 should just be provided. Further, at least one vehicle lighting device 61 may be provided, or both the vehicle lighting device 1 and the vehicle lighting device 61 may be provided.

As shown in FIG. 20, the vehicle lighting device 100 can be provided with, for example, a vehicle lighting device 1, a socket 101, a housing 102, and a cover 103.

The socket 101 can be provided in the housing 102. The insertion portion 42 of the housing 40 provided in the vehicle lighting device 1 is inserted into the socket 101 . The socket 101 is made of an insulating material such as resin, for example.
Further, although FIG. 20 illustrates a case where the socket 101 and the housing 102 are provided separately, the socket 101 and the housing 102 may be formed integrally.

The socket 101 can be provided with a recess that opens at one end. The vehicle lighting device 1 (insertion portion 42) is inserted into the recess. Moreover, a socket terminal 101a corresponding to one voltage polarity (for example, positive) and a socket terminal 101b corresponding to the other voltage polarity (for example, negative) can be provided inside the recess. Note that, as described above, as long as the vehicle lighting device 1 is provided with a non-polar circuit, the mounting direction of the vehicle lighting device 1 (insertion portion 42) is not limited.

The socket terminals 101a and 101b can be elastically deformed. When the insertion portion 42 is inserted into the recess, the socket terminals 101a and 101b are electrically connected to the terminal 50, respectively.

A lighting circuit or the like provided outside the vehicle lamp 100 can be electrically connected to the socket terminals 101a and 101b. Note that a lighting circuit may be provided on at least one of the inside and outside of the housing 102.

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

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

Note that when the vehicle lighting device 61 is provided, the board 63 provided in the vehicle lighting device 61 is inserted into the socket 101. The socket terminals 101a and 101b are each electrically connected to the connection pad 21e1.

Although several 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 forms, and various omissions, substitutions, changes, etc. can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents. Further, each of the embodiments described above can be implemented in combination with each other.

Additional notes regarding the above-described embodiments will be shown below.

(Additional note 1)
An optical element provided in a vehicle lighting device including a light emitting element,
The optical element is provided on the light emission side of the light emitting element,
a concave portion provided on an end surface opposite to the light emitting element side, the dimension of which in a direction perpendicular to the central axis of the optical element gradually decreases as it approaches the light emitting element side;
The inner wall of the recess has a first region, a second region, a third region, and a fourth region arranged in a direction along the central axis of the optical element,
The first region is located on the light emitting element side, and an end of the first region on the light emitting element side is a flat surface perpendicular to the central axis of the optical element,
The second region is provided between the opening of the recess and the first region, and includes a curved surface that protrudes toward the outside of the optical element,
The third region is provided between the opening of the recess and the second region, and includes a curved surface that protrudes toward the outside of the optical element,
The fourth region is an optical element provided between the opening of the recess and the third region, and includes a curved surface protruding toward the outside of the optical element.

(Additional note 2)
The optical element according to supplementary note 1, wherein the first region includes a curved surface that projects toward the inside of the optical element.

(Additional note 3)
The radius of curvature of the curved surface in the fourth region is larger than the radius of curvature of the curved surface in the third region, and the radius of curvature of the curved surface in the third region is larger than the radius of curvature of the curved surface in the second region. The optical element according to large appendix 1 or 2.

(Additional note 4)
The light emitted from the light emitting element toward the end of the first region on the light emitting element side is emitted near a polar angle of 0°,
The light emitted from the light emitting element toward the second region, the third region, and the fourth region is emitted in the vicinity of a polar angle of 45°,
The optical element according to any one of appendices 1 to 3, wherein the light emitted from the light emitting element toward the side of the first region is emitted at a polar angle of approximately 100°.

(Appendix 5)
A light emitting element;
a first substrate having a first surface on which the light emitting element is provided, and a second surface opposite to the first surface;
a second substrate provided on the second surface of the first substrate and extending in a direction substantially perpendicular to the second surface;
The optical element according to claim 1, provided on the first surface side of the first substrate;
a pair of connection pads provided on the second substrate and electrically connected to the light emitting element;
A vehicle lighting device equipped with.

(Appendix 6)
A housing comprising a storage part and an insertion part provided at one end of the storage part, having a plate shape, and being attached to a socket terminal of a socket provided in a vehicle lamp;
a pair of terminals provided in the widthwise center of the insertion portion in the thickness direction of the insertion portion, sandwiching the central axis of the vehicle lighting device;
further comprising;
the second substrate is provided inside the housing,
One end side of the pair of terminals is electrically connected to the connection pad inside the housing,
The vehicle lighting device according to appendix 5, wherein the other end side of the pair of terminals is provided on a surface in the thickness direction of the insertion portion outside the housing.

(Appendix 7)
The vehicle lighting device according to appendix 5 or 6;
a socket having a pair of socket terminals electrically connected to a pair of connection pads provided on the vehicle lighting device;
Vehicle lighting equipment equipped with.

Reference Signs List 1 vehicle illumination device, 1a central axis, 10 light emitting section, 11 substrate, 11a surface, 11b surface, 12 light emitting element, 21 substrate, 21e wiring pattern, 21e1 connection pad, 30 optical element, 30a central axis, 30b1 recess, 30b1a ~30b1d area, 40 housing, 41 storage section, 42 insertion section, 50 terminal, 61 vehicle lighting device, 61a central shaft, 63 board, 100 vehicle lamp, 101 socket, 101a socket terminal, 101b socket terminal

Claims (7)

An optical element provided in a vehicle lighting device including a light emitting element,
The optical element is provided on the light emission side of the light emitting element,
a concave portion provided on an end surface opposite to the light emitting element side, the dimension of which in a direction perpendicular to the central axis of the optical element gradually decreases as it approaches the light emitting element side;
The inner wall of the recess has a first region, a second region, a third region, and a fourth region arranged in a direction along the central axis of the optical element,
The first region is located on the light emitting element side, and an end of the first region on the light emitting element side is a flat surface perpendicular to the central axis of the optical element,
The second region is provided between the opening of the recess and the first region, and includes a curved surface that protrudes toward the outside of the optical element,
The third region is provided between the opening of the recess and the second region, and includes a curved surface that protrudes toward the outside of the optical element,
The fourth region is an optical element provided between the opening of the recess and the third region, and includes a curved surface protruding toward the outside of the optical element. The optical element according to claim 1, wherein the first region includes a curved surface protruding toward the inside of the optical element. The radius of curvature of the curved surface in the fourth region is larger than the radius of curvature of the curved surface in the third region, and the radius of curvature of the curved surface in the third region is larger than the radius of curvature of the curved surface in the second region. The optical element according to claim 1 or 2, which is large. The light emitted from the light emitting element toward the end of the first region on the light emitting element side is emitted near a polar angle of 0°,
The light emitted from the light emitting element toward the second region, the third region, and the fourth region is emitted in the vicinity of a polar angle of 45°,
The optical element according to claim 1 , wherein the light emitted from the light emitting element toward the side of the first region is emitted at a polar angle of approximately 100°. A light emitting element;
a first substrate having a first surface on which the light emitting element is provided, and a second surface opposite to the first surface;
a second substrate provided on the second surface of the first substrate and extending in a direction substantially perpendicular to the second surface;
The optical element according to claim 1, provided on the first surface side of the first substrate;
a pair of connection pads provided on the second substrate and electrically connected to the light emitting element;
A vehicle lighting device equipped with. A housing comprising a storage part and an insertion part provided at one end of the storage part, having a plate shape, and being attached to a socket terminal of a socket provided in a vehicle lamp;
a pair of terminals provided in the widthwise center of the insertion portion in the thickness direction of the insertion portion, sandwiching the central axis of the vehicle lighting device;
further comprising;
the second substrate is provided inside the housing,
One end side of the pair of terminals is electrically connected to the connection pad inside the housing,
6. The vehicle lighting device according to claim 5, wherein the other end side of the pair of terminals is provided on a surface in the thickness direction of the insertion portion outside the housing. A vehicle lighting device according to claim 5 or 6;
a socket having a pair of socket terminals electrically connected to a pair of connection pads provided on the vehicle lighting device;
Vehicle lighting equipment equipped with.

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