JP2020047516A - Vehicular lighting device and vehicular lighting fixture - Google Patents

Abstract

To provide a vehicular lighting device from which desired light distribution can be obtained when the vehicular lighting device is fitted to a holder of a vehicular lighting fixture, and to provide a vehicular lighting fixture.SOLUTION: A vehicular lighting device includes: a pair of sockets; a substrate installed between one of the sockets and the other socket and having a wiring pattern; at least one light-emitting device electrically connected to the wiring pattern; and a cover for covering the light-emitting device. Ends of the cover in a direction that the pair of sockets face are provided at side faces of the sockets.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a vehicle lighting device and a vehicle lamp.

There is a vehicular lighting device including a pair of bases and an airtight container provided between the bases and the base and in which a filament is sealed.
In recent years, from the viewpoint of energy saving and long life, a vehicle lighting device provided with a filament has been replaced by a vehicle lighting device provided with a light emitting diode.
Therefore, there has been proposed a vehicle lighting device including a pair of cylindrical bases, and a substrate provided between the bases and having a light emitting diode.

Here, the vehicle lighting device provided with the filament irradiates light substantially uniformly around the airtight container. Therefore, when attaching the vehicle lighting device provided with the filament to the holder of the vehicle lamp, it is not necessary to consider the mounting direction.
On the other hand, a vehicle lighting device provided with a light emitting diode emits light mainly in a direction substantially perpendicular to the surface of the substrate. Therefore, when mounting the vehicle lighting device provided with the light emitting diode to the holder of the vehicle lamp, a desired light distribution may not be obtained unless the mounting direction is considered.
Thus, there has been a demand for the development of a technology capable of obtaining a desired light distribution when the vehicle lighting device is mounted on a holder of a vehicle lamp.

JP 2004-241191 A

  The problem to be solved by the present invention is to provide a vehicle lighting device and a vehicle lighting device capable of obtaining a desired light distribution when the vehicle lighting device is attached to a holder of the vehicle lighting device.

  The lighting device for a vehicle according to the embodiment includes: a pair of bases; a base provided with a wiring pattern provided between one base and the other base; and electrically connected to the wiring pattern. At least one light emitting element; and a cover covering the light emitting element. An end of the cover in a direction in which the pair of bases face each other is provided on a side surface of the base.

  According to the embodiment of the present invention, it is possible to provide a vehicle lighting device and a vehicle lighting device capable of obtaining a desired light distribution when the vehicle lighting device is mounted on a holder of the vehicle lighting device.

FIG. 1 is a schematic perspective view illustrating a vehicle lighting device according to an embodiment. FIG. 2 is a schematic exploded view of the vehicle lighting device. It is a schematic diagram for illustrating the vicinity of the end of the cover and a holder. (A), (b) is a schematic diagram for illustrating the vicinity of the end of the cover and a holder according to another embodiment. It is a schematic perspective view for illustrating the case where a tip part is omitted. FIG. 9 is a schematic exploded view illustrating a vehicle lighting device according to another embodiment. It is a schematic diagram for illustrating the vicinity of the end of the cover and a holder. It is a schematic perspective view for illustrating the lighting device for vehicles concerning other embodiments. It is a schematic side view for illustrating the lighting device for vehicles concerning other embodiments. It is a schematic plan view for illustrating the lighting device for vehicles concerning other embodiments. It is a schematic perspective view for illustrating the vehicular lamp concerning this embodiment. It is a schematic perspective view for illustrating the holder concerning other embodiments.

Hereinafter, embodiments will be described with reference to the drawings. In each of the drawings, similar components are denoted by the same reference numerals, and detailed description will be omitted as appropriate.
As the vehicle lighting device 1 according to the present embodiment, for example, those used for a room lamp, a meter lamp, a reading lamp, and the like provided in an automobile, a railway vehicle, and the like can be exemplified. However, the application of the vehicle lighting device 1 is not limited to these.

(Vehicle lighting system)
FIG. 1 is a schematic perspective view for illustrating a vehicle lighting device 1 according to the present embodiment.
FIG. 2 is a schematic exploded view of the vehicle lighting device 1.
As shown in FIGS. 1 and 2, the vehicle lighting device 1 includes a light emitting unit 10, a base 20, and a cover 30.
The light emitting unit 10 includes a substrate 11, a light emitting element 12, a resistor 13, and a diode 14.

  The substrate 11 has a plate shape. The central portion of the substrate 11 is provided with a convex portion 11c that projects in a direction perpendicular to the direction in which the pair of bases 20 face each other. The protrusions 11c can be provided one by one on both sides of the substrate 11. The width W1 of the end of the substrate 11 on the base 20 side can be shorter than the width W2 of the base 20. The width W3 of the central portion of the substrate 11 (the distance between the tops of the protrusions 11c) can be longer than the width W1 of the end of the substrate 11 on the base 20 side. In this case, the width W3 of the central portion of the substrate 11 can be longer than the width W2 of the base 20, can be shorter than the width W2 of the base 20, and the width W2 of the base 20 can be reduced. Can be the same as The width dimension is a dimension in a direction orthogonal to a direction in which the pair of bases 20 face each other. In order to facilitate replacement with a conventional vehicle lighting device having a filament, the width dimension W3 of the central portion of the substrate 11 can be set to 20 mm or less, for example, about 6.4 mm.

  If the width dimension W3 of the central portion of the substrate 11 is longer than the width dimension W1 of the end portion of the substrate 11 on the base 20 side, the number and arrangement of the light emitting elements 12 can be easily changed. Further, when attaching / detaching the vehicle lighting device 1 to / from the holder 103 of the vehicle lamp 100, a finger can be put on the central portion of the substrate 11. Therefore, attachment and detachment of the vehicle lighting device 1 to and from the holder 103 are facilitated.

  A hole 11a is provided in the vicinity of the end of the substrate 11 on the base 20 side. The hole 11a is provided in a portion of the substrate 11 where the connection pad 11bb is provided. The holes 11 a are provided one by one in the vicinity of both ends of the substrate 11. The hole 11a penetrates through the substrate 11 in the thickness direction. Inside the hole 11a, a distal end portion 20b2 of the connection portion 20b of the base 20 is provided.

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

When the light emitting element 12 generates a large amount of heat, the substrate 11 is preferably formed using a material having a high thermal conductivity from the viewpoint of heat radiation. Examples of the material having a high thermal conductivity include ceramics such as aluminum oxide and aluminum nitride, a high thermal conductive resin, and a metal plate whose surface is coated with an insulating material. The high thermal conductive resin is, for example, a resin obtained by mixing a filler such as aluminum oxide or carbon (carbon) with a resin such as PET (polyethylene terephthalate) or nylon.
The thickness of the substrate 11 can be not less than 0.8 mm and not more than 2.2 mm, for example, about 1.6 mm. However, the thickness of the substrate 11 is not limited to the illustrated one. The substrate 11 may have a single-layer structure or a multi-layer structure.

On one surface of the substrate 11, a wiring pattern 11b is provided. The wiring pattern 11b has a mounting pad 11ba and a connection pad 11bb. The mounting pad 11ba and the connection pad 11bb are electrically connected.
The mounting pad 11ba can be provided at a central portion of the substrate 11.
The connection pad 11bb can be provided, for example, so as to surround the hole 11a. The connection pad 11bb can be further provided inside the hole 11a.
The wiring pattern 11b is formed from a conductive material. The wiring pattern 11b can be formed from a low-resistance metal such as silver, copper, or aluminum.

Further, the wiring pattern 11b can be provided on the other surface of the substrate 11. The wiring pattern 11b provided on one surface of the substrate 11 and the wiring pattern 11b provided on the other surface of the substrate 11 can be electrically connected by a conductive via penetrating in the thickness direction of the substrate 11. Alternatively, the connection can be made electrically through a conductive material provided inside the hole 11a.
If the wiring pattern 11b is also provided on the other surface of the substrate 11, elements such as the resistor 13 and the diode 14 can be mounted on the other surface of the substrate 11. Therefore, since the types and the number of elements to be mounted can be increased, it is easy to protect the vehicle lighting device 1 and to achieve multi-functionality.

At least one light emitting element 12 is provided on one surface of the substrate 11. The light emitting element 12 is electrically connected to the wiring pattern 11b. The light emitting element 12 can be mounted on the mounting pad 11ba. The light emitting element 12 can be, for example, a light emitting diode, an organic light emitting diode, a laser diode, or the like.
The light emitting element 12 can be, for example, a surface mounted light emitting element such as a PLCC (Plastic Leaded Chip Carrier) type. Further, the light emitting element 12 may be, for example, a light emitting element having a lead wire such as a shell type. The light emitting element 12 illustrated in FIGS. 1 and 2 is a surface mount type light emitting element.

  Further, the light emitting element 12 may be mounted by a COB (Chip On Board). When the light emitting element 12 is mounted by COB, the light emitting element 12 in a chip shape, wiring for electrically connecting the light emitting element 12 to the wiring pattern 11b, a frame-shaped member surrounding the light emitting element 12 and the wiring, A sealing portion or the like provided inside the frame-shaped member and covering the light emitting element 12 and the wiring can be provided on one surface of the substrate 11. Further, the sealing portion may include a phosphor. The phosphor may be, for example, a YAG phosphor (yttrium aluminum garnet phosphor). It should be noted that the type of the phosphor is not limited to the illustrated one. The type of the phosphor can be appropriately changed according to the use of the vehicle lighting device 1 or the like so as to obtain a desired emission color.

The light emitting surface of the light emitting element 12 is substantially parallel to the surface of the substrate 11. The light emitting element 12 emits light mainly in a direction perpendicular to the surface of the substrate 11. If the light emitting element 12 is provided on one surface of the substrate 11, the light distribution characteristics will be uneven. However, in the case where the vehicle lighting device 1 is used as a vehicle interior light (for example, a room lamp, a meter lamp, a reading light, or the like), light may be applied to one side of the vehicle lighting device 1. Therefore, when the vehicle lighting device 1 is used as a vehicle interior light, it is preferable to have such light distribution characteristics.
The number, size, arrangement, and the like of the light emitting elements 12 are not limited to those illustrated, but 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 12 are provided, the plurality of light emitting elements 12 can be connected in series.

  The resistor 13 can be provided on at least one of one surface and the other surface of the substrate 11. In the case illustrated in FIGS. 1 and 2, the resistor 13 is provided on the other surface of the substrate 11. If the light emitting element 12 is provided on one surface of the substrate 11 and the resistor 13 is provided on the other surface of the substrate 11, light emitted from the light emitting element 12 is absorbed by the resistor 13 or blocked by the resistor 13. Can be suppressed.

The resistor 13 is electrically connected to the wiring pattern 11b. The resistor 13 can be connected in series with the light emitting element 12 via the wiring pattern 11b.
The resistor 13 can be a current limiting resistor.
Further, the resistor 13 can adjust the brightness of the light emitting element 12. Since the forward voltage characteristics of the light emitting element 12 vary, if the applied voltage between the anode terminal and the ground terminal is kept constant, the brightness (luminous flux, luminance, luminous intensity, and illuminance) of the light emitting element 12 is reduced. Variations occur. Therefore, the value of the current flowing through the light emitting element 12 is set within the predetermined range by the resistor 13 so that the brightness of the light emitting element 12 falls within the predetermined range. In this case, by changing the resistance value of the resistor 13, the value of the current flowing through the light emitting element 12 can be set within a predetermined range.

  The resistor 13 can be, for example, a surface-mounted 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 13 illustrated in FIGS. 1 and 2 is a surface-mount type resistor. The number, size, arrangement, and the like of the resistors 13 are not limited to those illustrated, but can be appropriately changed according to the number, specifications, and the like of the light emitting elements 12.

  The resistance of the film-shaped resistor can be easily adjusted. Therefore, when adjusting the resistance value, it is preferable to use a film-shaped resistor. In this case, the adjustment of the resistance value can be performed as follows. First, a film-shaped resistor (resistor 13) is formed on the surface of the substrate 11 by using a screen printing method or the like. Next, a part of the resistor 13 is removed by irradiating the resistor 13 with a laser beam. Then, the resistance value of the resistor 13 is changed depending on the size of the removed portion. In this case, if a part of the resistor 13 is removed, the resistance value increases.

  The diode 14 can be provided on at least one of one surface and the other surface of the substrate 11. In the case illustrated in FIGS. 1 and 2, the diode 14 is provided on the other surface of the substrate 11. If the light emitting element 12 is provided on one surface of the substrate 11 and the diode 14 is provided on the other surface of the substrate 11, light emitted from the light emitting element 12 may be absorbed by the diode 14 or blocked by the diode 14. Can be suppressed.

The diode 14 is electrically connected to the wiring pattern 11b. The diode 14 can be connected in series with the light emitting element 12 via the wiring pattern 11b.
When at least one of the resistor 13 and the diode 14 is provided on the other surface of the substrate 11, the shape of the wiring pattern 11b provided on one surface and the other surface of the substrate 11 and the arrangement of the conductive vias are different. , The resistor 13 and the diode 14 may be connected in series with the light emitting element 12.
The diode 14 is provided to prevent a reverse voltage from being applied to the light emitting element 12 and to prevent pulse noise from being applied to the light emitting element 12 from the reverse direction.

In addition, electrical components such as transistors, capacitors, and integrated circuits can be provided on the substrate 11 as needed.
In addition, a covering portion that covers a part of the wiring pattern 11b or a film-shaped resistor may be provided. The covering portion may be, for example, a film made of a white solder resist, a film made of a glass material, or the like.
Note that the resistor 13, the diode 14, and the electric component do not necessarily need to be provided on the substrate 11. For example, the resistor 13, the diode 14, and the electric component can be provided on a circuit board or the like provided on the vehicle lamp 100.
However, if the resistor 13, the diode 14, and the electric components are provided on the substrate 11, the protection and the multifunctionality of the vehicle lighting device 1 can be achieved without modifying the existing vehicle lamp 100.

The base 20 is provided as a pair. The light emitting section 10 (substrate 11) is provided between one base 20 and the other base 20.
As shown in FIG. 2, the base 20 has a terminal portion 20a and a connection portion 20b.
A space can be provided inside the terminal portion 20a. In this case, the space can be opened at both ends of the terminal portion 20a. If a space is provided inside the terminal portion 20a, the weight of the base 20 and the weight of the vehicle lighting device 1 can be reduced.

  The external shape of the terminal portion 20a is not particularly limited. However, in consideration of attaching and detaching the terminal portion 20a to and from the holder 103 of the vehicular lamp 100, at least the external shape of the portion of the terminal portion 20a held by the holder 103 should be cylindrical or a part of a cylinder. Is preferred. The external shape of the terminal portion 20a illustrated in FIG. 2 is a part of a cylinder.

  In addition, a flat surface 20a1 substantially parallel to the surface of the substrate 11 can be provided on the side surface of the base 20 (terminal portion 20a). In this case, if the flat surface 20a1 is provided on the side on which the light emitting element 12 is provided, the distance between the screen printing mask and the surface of the substrate 11 becomes long, In addition, interference between the base 20 (terminal portion 20a) and the light emitting element 12 can be suppressed.

When no element or the like is mounted on the surface of the substrate 11 opposite to the side on which the light emitting element 12 is provided, it is not necessary to provide the flat surface 20a1 on the side opposite to the side on which the light emitting element 12 is provided. .
However, if the flat surface 20a1 is provided on the side opposite to the side on which the light emitting element 12 is provided, the flat surface 20a1 can be brought into contact with the support 103a1 of the holder 103. Therefore, the posture of the vehicle lighting device 1 can be stabilized, and it becomes easy to obtain a desired light distribution.

The connection portion 20b is provided at an end of the base 20 on the substrate 11 side. The external shape of the connection part 20b can be L-shaped. The connection part 20b has a base part 20b1 substantially parallel to the surface of the substrate 11, and a tip part 20b2 extending in the thickness direction of the substrate 11. The tip portion 20b2 is provided in the hole 11a of the substrate 11. That is, each of the pair of bases 20 has a base 20b1 substantially parallel to the surface of the substrate 11, and a tip 20b2 having one end connected to the base 20b1 and the other end provided in the hole 11a. In this case, the tip portion 20b2 may be press-fitted into the hole 11a, may be soldered to the hole 11a, or may be bonded to the hole 11a with a conductive adhesive. That is, the base 20 and the substrate 11 may be electrically and mechanically connected.
Further, the tip portion 20b2 can be soldered to the connection pad 11bb. The tip portion 20b2 can be bonded to the connection pad 11bb with a conductive adhesive.

  The terminal portion 20a and the connection portion 20b can be integrally formed by a die casting method, a press molding method, a sheet metal method, or the like. Further, the terminal portion 20a and the connection portion 20b may be joined by welding, brazing, or the like.

  The base 20 (terminal portion 20a, connection portion 20b) is formed from a conductive material. The base 20 can be formed from a low-resistance metal such as a copper alloy or an aluminum alloy, for example. Further, a plating layer made of nickel, chromium, or the like can be provided on the surface of the base 20.

The cover 30 covers at least the light emitting element 12. If the cover 30 covers the light emitting element 12, it is possible to suppress the worker or the like from touching the light emitting element 12. Therefore, the light emitting element 12 can be prevented from being stained or damaged.
The cover 30 can cover the wiring pattern 11b provided on the surface of the substrate 11 on the light emitting element 12 side. If the cover 30 covers the wiring pattern 11b, it is possible to suppress a worker or the like from touching the wiring pattern 11b. Therefore, it is possible to suppress the wiring pattern 11b from being stained or damaged.

  The end of the cover 30 in the direction in which the pair of bases 20 face each other is provided on a side surface of the base 20. The vicinity of the end of the cover 30 in the direction in which the pair of bases 20 face each other (hereinafter, simply referred to as the vicinity of the end of the cover 30) covers a part of the side surface of the base 20 (terminal portion 20a). For example, the vicinity of the end of the cover 30 covers a part of the side surface of the base 20 (terminal portion 20a) in a direction perpendicular to the surface of the substrate 11. In the case illustrated in FIGS. 1 and 2, the end of the cover 30 is provided on the flat surface 20a1 of the base 20 (terminal 20a).

Here, the vehicle lighting device provided with the filament irradiates light substantially uniformly around the airtight container. Therefore, when attaching the vehicle lighting device provided with the filament to the holder 103 of the vehicle lamp 100, it is not necessary to consider the mounting direction.
On the other hand, the vehicle lighting device 1 including the light emitting element 12 emits light mainly in a direction substantially perpendicular to the surface of the substrate 11. Therefore, when the vehicle lighting device 1 including the light emitting element 12 is mounted on the holder 103 of the vehicle lamp 100, a desired light distribution may not be obtained unless the mounting direction is considered.

  Therefore, in vehicle lighting device 1 according to the present embodiment, the end of cover 30 is provided on the side surface of base 20 (terminal portion 20a). In this manner, when the vehicle lighting device 1 is mounted on the holder 103, the side surface of the cover 30 can be brought into contact with the holder 103.

  FIG. 3 is a schematic view illustrating the vicinity of the end of the cover 30 and the holder 103. In the case illustrated in FIG. 3, the vicinity of the end of the cover 30 is provided on the flat surface 20a1 of the base 20 (terminal 20a).

  The holder 103 has a base 103a and a pair of plate-like bodies 103b. A plate-like body 103b is provided at each of both ends of the base 103a. The pair of plate bodies 103b extend in a direction substantially perpendicular to the surface of the base 103a. The pair of plate members 103b sandwich the base 20 by elastic force. A bent portion 103c is provided at an end of the plate 103b opposite to the base 103a. The bent portion 103c is inclined in a direction away from the central axis of the holder 103 toward the distal end.

  As shown in FIG. 3, if the side surface 30 c of the cover 30 can contact the holder 103, the rotation of the vehicle lighting device 1 inside the holder 103 can be suppressed. Therefore, if the vehicle lighting device 1 is attached to the holder 103, light can be emitted in a desired direction, and it becomes easy to obtain a desired light distribution. Further, even when vibrations caused by traveling are applied to the vehicle lighting device 1, the posture of the vehicle lighting device 1 can be stabilized.

  When the vehicle lighting device 1 is mounted on the holder 103, the side surface 30c of the cover 30 may be in contact with the holder 103, or a gap may be provided. However, the gap is preferably small, and more preferably, the side surface 30c of the cover 30 and the holder 103 are in contact with each other.

FIGS. 4A and 4B are schematic diagrams illustrating the vicinity of an end of a cover 30 and a holder 103 according to another embodiment.
As shown in FIGS. 4A and 4B, a protrusion 30 d can be further provided on the side surface 30 c of the cover 30. The protrusion 30d protrudes in a direction perpendicular to the direction in which the pair of bases 20 face each other. The projection 30d protrudes from the side surface 30c of the cover 30. The protrusions 30d can be provided one by one on the side surfaces 30c on both sides of the cover 30. The protrusion 30 d can be provided near the end of the cover 30. The protrusion 30d is capable of contacting the holder 103 on which the base 20 is mounted.

In this case, as shown in FIG. 4A, the protrusion 30d may be in contact with the bent portion 103c, or a gap may be provided between the protrusion 30d and the bent portion 103c. . Further, as shown in FIG. 4 (b), on the base 103a side of the bent portion 103c, the protrusion 30d may be brought into contact with the plate 103b, or between the protrusion 30d and the plate 103b. May be provided with a gap.
In addition, the protrusion 30d may be in contact with the bent portion 103c and the plate 103b, or a gap may be provided between the protrusion 30d and the bent 103c and the plate 103b. .
However, when a gap is provided, the smaller the gap, the better.

  By providing the protrusion 30d, it becomes easier to suppress the rotation of the vehicle lighting device 1 inside the holder 103. Therefore, if the vehicle lighting device 1 is attached to the holder 103, light can be emitted in a desired direction, and it is easier to obtain a desired light distribution. Further, even if vibrations due to traveling are applied to the vehicle lighting device 1, it becomes easier to stabilize the posture of the vehicle lighting device 1, and it is further easier to obtain a desired light distribution.

  Further, as shown in FIGS. 1 and 2, a space in which the light emitting element 12 and the like are stored can be provided inside the cover 30. An opening 30 a is provided at an end of the cover 30. The openings 30a can be provided at both ends of the cover 30. If the opening 30a is provided, the space inside the cover 30 and the space outside the cover 30 can be connected. In this manner, an airflow flowing between the inside and the outside of the cover 30 can be formed. Therefore, heat generated in the light emitting element 12 can be efficiently radiated.

  Further, a pair of holding portions 30b can be provided on the side surface 30c of the cover 30. The pair of holding portions 30b protrude toward the substrate 11 side. Each of the pair of holding parts 30b holds the convex part 11c of the substrate 11. For example, a hole 30b1 is provided in the holding unit 30b. The protrusion 11c is provided inside the hole 30b1. Further, the pair of holding portions 30b can sandwich the substrate 11 by the elastic force.

  The cover 30 can be formed from a light-transmitting material. The cover 30 can be formed from, for example, an acrylic resin or a polycarbonate resin. However, the material of the cover 30 is not limited to the illustrated one. In addition, the cover 30 may be colored or include light scattering particles. The cover 30 may have an optical element such as a lens.

Further, the above-described tip portion 20b2 of the base 20 may be omitted.
FIG. 5 is a schematic perspective view for illustrating a case where the distal end portion 20b2 is omitted.
In FIG. 5, the cover 30, the resistor 13, the diode 14, and the like are omitted.
As shown in FIG. 5, when the tip portion 20b2 is omitted, the base portion 20b1 may be connected to the substrate 11. For example, the base 20b1 can be soldered to the connection pad 11bb. Further, the base 20b1 can be bonded to the connection pad 11bb with a conductive adhesive. That is, each of the pair of bases 20 has a base 20 b 1 that is substantially parallel to the surface of the substrate 11. The base 20b1 is mechanically and electrically connected to a portion of the substrate 11 where the connection pads 11bb are provided.

In this case, the hole 11a of the substrate 11 can be omitted. With this configuration, the configuration of the vehicle lighting device 1 can be further simplified.
However, if the distal end portion 20b2 and the hole 11a are provided, the posture of the substrate 11 can be stabilized, and it becomes easy to obtain a desired light distribution. Further, the bonding strength between the substrate 11 and the base 20 can be improved.

  As described above, with the vehicle lighting device 1 according to the present embodiment, rotation of the vehicle lighting device 1 inside the holder 103 can be suppressed. Therefore, the posture of the vehicle lighting device 1 can be stabilized, and it becomes easy to obtain a desired light distribution. Further, since the light emitting section 10 (substrate 11) can be directly held by the connection section 20b, the substrate 11 can be held with a simple configuration. Further, the wiring pattern 11b and the base 20 can be electrically connected without separately providing a wiring or the like.

FIG. 6 is a schematic exploded view illustrating a vehicle lighting device 1a according to another embodiment. FIG. 7 is a schematic view illustrating the vicinity of the end of the cover 31 and the holder 103. As shown in FIG. 6, the vehicle lighting device 1a includes a light emitting unit 10a, a base 21, and a cover 31.
The light emitting section 10a is provided with a substrate 15 and a light emitting element 12. The light emitting unit 10a may further include a resistor 13 and a diode 14.
The substrate 15 has a plate shape. The width dimension W4 of both ends of the substrate 15 is shorter than the width dimension W2 of the base 21. The substrate 15 may have a reduced width at the end on the base side of the substrate 11. The connection pad 11bb can be provided near the end of the substrate 15.

The base 21 is provided as a pair. The external shape of the base 21 can be, for example, the same as the external shape of the terminal portion 20a. The base 21 is provided with a concave portion 21a. The concave portion 21 a is open on the end face of the base 21 on the substrate 15 side and on the side surface of the base 21. An end of the substrate 15 is provided inside the concave portion 21a. In this case, the end of the substrate 15 may be pressed into the recess 21a, or a gap may be provided between the end of the substrate 15 and the inner wall of the recess 21a. Further, at least one of the end face of the base 21 and the inner wall of the concave portion 21a can be soldered to the connection pad 11bb, or can be bonded with a conductive adhesive.
That is, each of the pair of bases 21 has the concave portion 21a opened on the end face. The portion of the substrate 15 where the connection pads 11bb are provided is provided in the recess 21a.

If the end of the substrate 15 is provided inside the concave portion 21a, the posture of the substrate 15 can be stabilized, and it becomes easy to obtain a desired light distribution. Further, the bonding strength between the substrate 15 and the base 21 can be improved.
The material of the base 21 can be, for example, the same as the material of the base 20.

As shown in FIGS. 6 and 7, the cover 31 covers at least the light emitting element 12. If the cover 31 covers the light emitting element 12, it is possible to suppress a worker or the like from touching the light emitting element 12. Therefore, the light emitting element 12 can be prevented from being stained or damaged.
Further, the cover 31 can cover the wiring pattern 11b provided on the surface of the substrate 11 on the light emitting element 12 side. If the cover 31 covers the wiring pattern 11b, it is possible to suppress a worker or the like from touching the wiring pattern 11b. Therefore, it is possible to suppress the wiring pattern 11b from being stained or damaged.

  The end of the cover 31 in the direction in which the pair of bases 21 face each other is provided on a side surface of the base 21. The vicinity of the end of the cover 31 in the direction in which the pair of bases 21 face each other (hereinafter, simply referred to as the vicinity of the end of the cover 31) covers a part of the side surface of the base 21. For example, the vicinity of the end of the cover 31 covers a part of the side surface of the base 21 in a direction perpendicular to the surface of the substrate 15. In this way, when the vehicle lighting device 1a is attached to the holder 103, the side surface of the cover 31 can be brought into contact with the holder 103.

  As shown in FIG. 7, if the side surface of the cover 31 contacts the holder 103, the rotation of the vehicle lighting device 1 a inside the holder 103 can be suppressed. Therefore, if the vehicle lighting device 1a is attached to the holder 103, light can be emitted in a desired direction, and it becomes easy to obtain a desired light distribution. Further, even if vibrations due to traveling are applied to the vehicle lighting device 1a, the posture of the vehicle lighting device 1a can be stabilized.

  Note that when the vehicle lighting device 1a is mounted on the holder 103, the side surface of the cover 31 may contact the holder 103, or a slight gap may be provided. However, it is preferable that the gap is small, and it is more preferable that the side surface of the cover 31 and the holder 103 are in contact with each other.

In addition, a pair of holding portions 31b can be provided on the side surface of the cover 31. The pair of holding portions 31b protrude toward the substrate 15 side. Each of the pair of holding portions 31b holds the protrusion 11c of the substrate 15. The holding section 31b can be the same as the holding section 30b described above.
The material of the cover 31 can be the same as the material of the cover 30 described above. In addition, the cover 31 can be colored or include light scattering particles. Further, the cover 31 may have an optical element such as a lens.

  With the vehicle lighting device 1a according to the present embodiment, rotation of the vehicle lighting device 1a inside the holder 103 can be suppressed. Therefore, the posture of the vehicle lighting device 1a can be stabilized, and it becomes easy to obtain a desired light distribution. Further, since the light emitting portion 10a (substrate 15) can be directly held by the concave portion 21a, the substrate 15 can be held with a simple configuration. Further, the wiring pattern 11b and the base 21 can be electrically connected without separately providing a wiring or the like.

FIG. 8 is a schematic perspective view illustrating a vehicle lighting device 1b according to another embodiment.
The light emitting unit 10, the base 22, and the cover 31 are provided in the vehicle lighting device 1b.
In FIG. 8, the cover 31, the resistor 13, the diode 14, and the like are omitted.
The base 22 is provided as a pair. The external shape of the base 22 can be, for example, the same as the external shape of the terminal portion 20a. The base 22 is provided with a concave portion 22a. The recess 22a is open at the end face of the base 22 on the substrate 11 side. The vicinity of the end of the substrate 11 is provided inside the concave portion 22a. In this case, the end of the substrate 11 may be pressed into the recess 22a, or a gap may be provided between the end of the substrate 11 and the inner wall of the recess 22a. Further, at least one of the end face of the base 22 and the inner wall of the concave portion 22a can be soldered to the connection pad 11bb, or can be bonded with a conductive adhesive. If a gap is provided between the end of the substrate 11 and the inner wall of the recess 22a, the base 22 is deformed by applying pressure to the base 22 so that the end of the substrate 11 (the connection pad 11bb) and the recess are formed. The inner wall 22a can also be brought into contact.

  That is, each of the pair of bases 22 has the concave portion 22a opened to the end face. The portion of the substrate 11 where the connection pads 11bb are provided is provided in the recess 22a.

If the end of the substrate 11 is provided inside the concave portion 22a, the posture of the substrate 11 can be stabilized, and it becomes easy to obtain a desired light distribution. Further, the bonding strength between the substrate 11 and the base 22 can be improved.
The material of the base 22 can be, for example, the same as the material of the base 20.

  According to vehicle lighting device 1b according to the present embodiment, rotation of vehicle lighting device 1b inside holder 103 can be suppressed. Therefore, the posture of the vehicle lighting device 1b can be stabilized, and it becomes easy to obtain a desired light distribution. Further, since the light emitting section 10 (substrate 11) can be directly held by the concave portion 22a, the substrate 11 can be held with a simple configuration. Further, the wiring pattern 11b and the base 22 can be electrically connected without separately providing a wiring or the like.

FIG. 9 is a schematic side view illustrating a vehicle lighting device 1c according to another embodiment.
FIG. 10 is a schematic plan view illustrating a vehicle lighting device 1c according to another embodiment.
As shown in FIGS. 9 and 10, the vehicle lighting device 1 c includes a light emitting unit 10, a base 23, and a cover 31.
9 and 10, the resistor 13 and the diode 14 are omitted.
The base 23 is provided as a pair. The base 23 has a terminal portion 20a and a connection portion 23b.
The connection portion 23b is provided at an end of the terminal portion 20a on the substrate 11 side. The connection part 23b is provided in a pair. A portion near the end of the substrate 11 is provided between the tip portions of the connection portions 23b. The pair of connecting portions 23b hold the vicinity of the end of the substrate 11 by elastic force. In addition, the tip of the connection portion 23b is in contact with the connection pad 11bb. That is, each of the pair of bases 23 has a pair of connection portions 23b sandwiching a portion of the substrate 11 where the connection pad 11bb is provided.

Furthermore, the tip of the connection portion 23b may be soldered to the connection pad 11bb, or may be bonded to the connection pad 11bb with a conductive adhesive.
The terminal portion 20a and the connection portion 23b can be integrally formed by a die casting method, a press molding method, a sheet metal method, or the like. Further, the terminal portion 20a and the connection portion 23b may be joined by welding, brazing, or the like.
The material of the base 23 can be, for example, the same as the material of the base 20.

  According to vehicle lighting device 1c according to the present embodiment, rotation of vehicle lighting device 1c inside holder 103 can be suppressed. Therefore, the posture of the vehicle lighting device 1c can be stabilized, and it becomes easy to obtain a desired light distribution. Further, since the light emitting section 10 (substrate 11) can be directly held by the connection section 23b, the substrate 11 can be held with a simple configuration. Further, the wiring pattern 11b and the base 23 can be electrically connected without separately providing a wiring or the like.

  As described above, each of the pair of bases 20 (21, 22, 23) is directly connected to the portion of the substrate 11 (15) where the connection pads 11bb are provided. The "direct connection" includes connection by elastic force, connection by compression, connection by solder or conductive adhesive.

(Vehicle lamp 100)
FIG. 11 is a schematic perspective view illustrating the vehicle lamp 100 according to the present embodiment. In the following, a case where the above-described vehicle lighting device 1 is provided will be exemplified. Although the case where one vehicle lighting device 1 is provided is illustrated, at least one vehicle lighting device 1 may be provided.
As shown in FIG. 11, the vehicle lighting device 100 includes a vehicle lighting device 1, a housing 101, a cover 102, and a holder 103.

The housing 101 has a box shape with one end opened. The housing 101 can be formed from, for example, a resin that does not transmit light.
The cover 102 is provided so as to close the opening of the housing 101. The cover 102 can be formed from a light-transmitting resin or the like. The cover 102 can have a function such as a lens, or can suppress glare. Further, the cover 102 can be provided on the housing 101 so as to be openable and closable, or can be provided detachably.

  The holder 103 is provided inside the housing 101. For example, the holder 103 can be fixed to the bottom surface of the housing 101. A pair of holders 103 is provided for one vehicle lighting device 1. The holder 103 holds the pair of bases 20 provided in the vehicle lighting device 1 by elastic force. The holder 103 can be formed from a metal such as phosphor bronze, for example. The holder 103 can be formed by, for example, a press molding method, a sheet metal method, or the like.

  By mounting the vehicle lighting device 1 on the pair of holders 103, the vehicle lighting device 1 and the holder 103 are mechanically and electrically connected. The pair of holders 103 are electrically connected to a power supply provided outside the vehicle lamp 100. Note that a circuit board may be provided on at least one of the inside and the outside of the housing 101, and the pair of holders 103 and a power supply may be electrically connected via the circuit board.

FIG. 12 is a schematic perspective view illustrating a holder 113 according to another embodiment.
As shown in FIG. 12, a pair of holders 113 can be provided for one vehicle lighting device. The holder 113 has a support portion 113a. The holder 113 can be obtained by further providing a support portion 113a on the holder 103.

  That is, each of the pair of holders 113 has the support portion 113a that supports the flat surface 20a1 of the base 20. When the vehicle lighting device 1 is mounted on the pair of holders 113, the support portion 113a and the flat surface 20a1 of the base 20 come into contact with each other. Therefore, it becomes easier to stabilize the posture of the vehicle lighting device 1, and it is further easier to obtain a desired light distribution.

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

  Reference Signs List 1 vehicle lighting device, 1a vehicle lighting device, 1b vehicle lighting device, 1c vehicle lighting device, 10 light emitting unit, 10a light emitting unit, 11 substrate, 11a hole, 11b wiring pattern, 11bb connection pad, 12 light emitting element, 15 Substrate, 20 base, 20a terminal, 20a1 flat surface, 20b connection, 20b1 base, 20b2 tip, 21 base, 21a recess, 22 base, 23 base, 23b connection, 30 cover, 30c side, 30d convex , 100 vehicle lamp, 101 housing, 103 holder, 113 holder, 113a support

Claims (11)

A pair of bases;
A substrate provided between one of the bases and the other base and having a wiring pattern;
At least one light emitting element electrically connected to the wiring pattern;
A cover covering the light emitting element;
With
The lighting device for a vehicle, wherein an end of the cover in a direction in which the pair of bases face each other is provided on a side surface of the base. On the side surface of the base, a flat surface substantially parallel to the surface of the substrate is provided,
The vehicle lighting device according to claim 1, wherein an end of the cover is provided on the flat surface.   The vehicle lighting device according to claim 1, wherein a side surface of the cover is capable of contacting a holder on which the base is mounted. A convex portion is provided on a side surface of the cover,
The vehicle lighting device according to claim 1, wherein the protrusion is configured to be able to contact a holder on which the base is mounted. The wiring pattern has a connection pad,
The vehicle lighting device according to any one of claims 1 to 4, wherein each of the pair of bases is directly connected to a portion of the substrate on which the connection pad is provided. In a portion of the substrate where the connection pads are provided, a hole is provided through the substrate in a thickness direction thereof,
6. The device according to claim 1, wherein each of the pair of bases has a base that is substantially parallel to a surface of the substrate, and a tip that has one end connected to the base and the other end provided in the hole. 7. The lighting device for a vehicle according to any one of the above. Each of the pair of bases has a base substantially parallel to the surface of the substrate,
The vehicle lighting device according to claim 1, wherein the base is mechanically and electrically connected to a portion of the substrate on which the connection pad is provided. Each of the pair of bases has a concave portion that opens on an end surface,
The vehicle lighting device according to claim 1, wherein a portion of the substrate on which the connection pad is provided is provided in the recess.   The vehicle lighting device according to any one of claims 1 to 5, wherein each of the pair of bases has a pair of connection portions that sandwich a portion of the substrate where the connection pad is provided. A vehicle lighting device according to any one of claims 1 to 9;
A pair of holders for holding a pair of bases provided in the vehicle lighting device;
A vehicle lighting device comprising: On a side surface of the base, a flat surface substantially parallel to a surface of a substrate provided in the vehicle lighting device is provided,
The vehicular lamp according to claim 10, wherein each of the pair of holders has a support portion that supports a flat surface of the base.

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