CN210107260U

CN210107260U - Lighting device for vehicle and lighting device for vehicle

Info

Publication number: CN210107260U
Application number: CN201921328490.2U
Authority: CN
Inventors: 松田阳平
Original assignee: Toshiba Lighting and Technology Corp
Current assignee: Toshiba Lighting and Technology Corp
Priority date: 2018-09-14
Filing date: 2019-08-16
Publication date: 2020-02-21
Anticipated expiration: 2029-08-16
Also published as: JP2020047376A

Abstract

The utility model provides a can install light emitting component's for vehicle lighting device and vehicle lamps and lanterns easily on the base plate of locating the lamp holder. The lighting device for a vehicle of the embodiment includes: a pair of lamp caps; a substrate provided between one of the bases and the other base and having a wiring pattern; and at least one light emitting element electrically connected to the wiring pattern. The pair of caps are each provided with a flat surface substantially parallel to the surface of the substrate.

Description

Lighting device for vehicle and lighting device for vehicle

Technical Field

Embodiments of the present invention relate to a lighting device for a vehicle and a lighting device for a vehicle.

Background

There is a vehicular lighting device including a pair of bases and an airtight container provided between the bases and enclosing a filament (filament).

In recent years, from the viewpoint of energy saving, long life, and the like, a vehicle lighting device including a filament has been replaced with a vehicle lighting device including a light emitting diode (diode).

To this end, there is proposed a lighting device for a vehicle, including: a pair of lamp caps in a cylindrical shape; the substrate is arranged between the lamp holder and is provided with a light-emitting diode; and a wiring member for electrically connecting the wiring pattern (pattern) provided on the substrate and the cap.

In manufacturing such a vehicle lighting device, a light emitting diode is mounted on a substrate, and an end portion of the substrate on which the light emitting diode is mounted is provided at a base. However, when the end portion of the substrate is provided on the base, the worker may touch the light emitting diode. If an operator touches the light emitting diode, the light emitting diode may be contaminated or damaged.

In this case, the light emitting diode can be prevented from being touched by an operator by mounting the light emitting diode on the substrate after the substrate is disposed between the bases. However, if the substrate is provided between the base and the base, the base may interfere with the mounting device, and the mounting device may be difficult to mount the light emitting diode. In this case, although the light emitting diodes can be individually soldered by an operator, the productivity is lowered, and the manufacturing cost is increased.

Therefore, it is desired to develop a technology capable of easily mounting a light emitting element on a substrate provided on a base.

[ Prior art documents ]

[ patent document ]

Patent document 1: japanese patent laid-open No. 2004-241191

SUMMERY OF THE UTILITY MODEL

[ problem to be solved by the utility model ]

The present invention has been made to solve the above problems, and an object of the present invention is to provide a lighting device for a vehicle and a lighting device for a vehicle, in which a light emitting element can be easily mounted on a substrate provided with a base.

[ means for solving problems ]

The lighting device for a vehicle of the embodiment includes: a pair of lamp caps; a substrate provided between one of the bases and the other base and having a wiring pattern; and at least one light emitting element electrically connected to the wiring pattern. The pair of caps are each provided with a flat surface substantially parallel to the surface of the substrate.

In the vehicle lighting device according to the embodiment, the following configuration may be adopted: the wiring pattern has connection pads, and the pair of caps are directly connected to portions of the substrate where the connection pads are provided, respectively.

In the vehicle lighting device according to the embodiment, the following configuration may be adopted: the substrate is provided with a hole penetrating in a thickness direction of the substrate at a portion where the connection pad is provided, the pair of caps each have a base portion and a tip portion, the base portions are substantially parallel to a surface of the substrate, one end side of the tip portion is connected to the base portion, and the other end side is provided in the hole.

In the vehicle lighting device according to the embodiment, the following configuration may be adopted: the pair of caps respectively have a base portion substantially parallel to the surface of the substrate, and the base portions are mechanically and electrically connected to the portion of the substrate where the connection pad is provided.

In the vehicle lighting device according to the embodiment, the following configuration may be adopted: the pair of lamp caps have recesses each having an opening at an end face, and the portion of the substrate on which the connection pad is provided in the recess.

In the vehicle lighting device according to the embodiment, the following configuration may be adopted: the pair of lamp caps respectively have a pair of connecting portions that sandwich a portion of the substrate where the connection pad is provided.

The vehicle lamp of the embodiment includes: the vehicular illumination device of the embodiment; and a pair of brackets that hold a pair of bases provided in the vehicle lighting device.

In the vehicle lamp according to the embodiment, the following configuration may be adopted: the pair of brackets have support portions for supporting flat surfaces of the lamp head, respectively.

[ effects of the utility model ]

According to the embodiments of the present invention, it is possible to provide a lighting device for a vehicle and a lighting device for a vehicle, in which a light emitting element can be easily mounted on a substrate provided in a base.

Drawings

Fig. 1 is a schematic perspective view illustrating a vehicle lighting device according to the present embodiment.

Fig. 2 is a schematic exploded view of the lighting device for a vehicle.

Fig. 3(a) and 3(b) are schematic views illustrating the application of the bonding material of the comparative example.

Fig. 4(a) and 4(b) are schematic views illustrating the application of the bonding material according to the present embodiment.

Fig. 5 is a schematic perspective view for illustrating a case where the tip portion is omitted.

Fig. 6 is a schematic exploded view illustrating a vehicle lighting device according to another embodiment.

Fig. 7 is a schematic perspective view illustrating a vehicle lighting device according to another embodiment.

Fig. 8 is a schematic side view illustrating a vehicle lighting device according to another embodiment.

Fig. 9 is a schematic plan view illustrating a vehicle lighting device according to another embodiment.

Fig. 10 is a schematic perspective view for illustrating the vehicular lamp of the present embodiment.

Fig. 11 is a schematic perspective view illustrating a stand according to another embodiment.

[ description of symbols ]

1: lighting device for vehicle

1 a: lighting device for vehicle

1 b: lighting device for vehicle

1 c: lighting device for vehicle

10: light emitting part

10 a: light emitting part

11: substrate

11 a: hole(s)

11 b: wiring pattern

11 bb: connection pad

12: light emitting element

15: substrate

20: lamp holder

20 a: terminal section

20a 1: flat surface

20 b: connecting part

20b 1: base part

20b 2: front end part

21: lamp holder

21 a: concave part

21 b: flat surface

22: lamp holder

22 b: flat surface

23: lamp holder

23a flat surface

23 b: connecting part

100: vehicle lamp

101: frame body

103: support frame

103 a: support frame

103a 1: supporting part

300: joining material

301: mask and method for manufacturing the same

Detailed Description

Hereinafter, embodiments are illustrated with reference to the drawings. In the drawings, the same constituent elements are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

As the vehicular illumination device 1 of the present embodiment, for example, an illumination device used for an interior lamp (room lamp), an instrument lamp (meter lamp), a reading lamp, and the like provided in an automobile, a train, or the like can be exemplified. However, the application of the vehicle lighting device 1 is not limited to these.

(Lighting device for vehicle)

Fig. 1 is a schematic perspective view illustrating a vehicle lighting device 1 according to the present embodiment.

Fig. 2 is a schematic exploded view of the lighting device 1 for a vehicle.

As shown in fig. 1 and 2, the vehicle lighting device 1 includes a light emitting portion 10 and a base 20.

The light emitting section 10 is provided with a substrate 11, a light emitting element 12, a resistor 13, and a diode 14.

The substrate 11 has a plate shape. The planar shape of the substrate 11 may be a quadrangle. The planar shape of the substrate 11 illustrated in fig. 1 and 2 is rectangular. The width dimension W1 of the base plate 11 may be shorter than the width dimension W2 of the lamphead 20. 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 easily replace the conventional vehicle lighting device including the filament, the width W1 of the substrate 11 may be 20mm or less, for example, about 6.4 mm.

However, the planar shape or the width dimension W1 of the substrate 11 is not limited to the example. For example, the width of the substrate 11 at which the light emitting element 12 is provided may be longer than the width of the substrate 11 at both ends. At this time, the width dimension of the portion of the substrate 11 where the light emitting elements 12 are provided may be longer than the width dimension W2 of the base 20. Thus, the number and arrangement of the light emitting elements 12 can be easily changed. Further, if the substrate 11 is provided with a portion having a long width dimension, the lighting device 1 for a vehicle can be gripped with fingers when the lighting device is attached to and detached from the bracket 103 of the vehicle lamp 100. Therefore, the vehicle illumination device 1 can be easily attached to and detached from the bracket 103.

A hole 11a is provided near the end of the substrate 11 on the base 20 side. The hole 11a is a portion provided with the connection pad 11bb provided in the substrate 11. One hole 11a is provided near each of both end portions of the substrate 11. The hole 11a penetrates the thickness direction of the substrate 11. The tip portion 20b2 of the connection portion 20b of the base 20 is provided inside the hole 11 a.

The substrate 11 may be formed of an insulating material. The substrate 11 may be made of an inorganic material such as ceramics (e.g., alumina or aluminum nitride), an organic material such as phenol paper or epoxy glass, or the like. The substrate 11 may be a metal plate whose surface is coated with an insulating material. In the case where the surface of the metal plate is coated with an insulating material, the insulating material may be one containing an organic material or one containing an inorganic material.

When the amount of heat generated by the light-emitting element 12 is large, the substrate 11 is preferably formed using a material having high thermal conductivity in view of heat dissipation. Examples of the material having high thermal conductivity include ceramics such as alumina and aluminum nitride, a highly thermally conductive resin, and a material obtained by coating the surface of a metal plate with an insulating material. The highly thermally conductive resin is obtained by, for example, mixing a filler (filler) containing alumina, carbon (carbon), or the like with a resin such as polyethylene terephthalate (PET) or nylon (nylon).

The thickness of the substrate 11 may be set to 0.8mm to 2.2mm, for example, about 1.6 mm. However, the thickness of the substrate 11 is not limited to the illustrated example.

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 11 bb. The mounting pad 11ba is electrically connected to the connection pad 11 bb.

The mounting pad 11ba may be provided in a central region of the substrate 11.

The connection pad 11bb may be provided so as to surround the hole 11a, for example. The connection pad 11bb can also be further provided inside the hole 11 a.

The wiring pattern 11b is formed of a conductive material. The wiring pattern 11b may be formed of a low-resistance metal such as silver, copper, or aluminum.

The wiring pattern 11b may 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 to each other through a conductive via (via) penetrating the substrate 11 in the thickness direction, or can be electrically connected to each other through a conductive material provided inside the via 11 a.

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, the number of types or the number of components to be mounted can be increased, and thus the vehicle lighting device 1 can be easily protected or made multifunctional.

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 11 b. The light emitting element 12 can be mounted on the mounting pad 11 ba. The light emitting element 12 is, for example, a light emitting diode, an organic light emitting diode, a laser diode (laser diode), or the like.

As the light emitting element 12, for example, a surface mount type light emitting element such as a Plastic Leaded Chip Carrier (PLCC) type can be used. The light emitting element 12 may be a light emitting element having a lead wire, such as a shell type light emitting element. The light-emitting element 12 illustrated in fig. 1 and 2 is a surface-mount light-emitting element.

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. When the light emitting element 12 is provided on one surface of the substrate 11, a light distribution characteristic is biased. However, when the lighting device 1 for a vehicle is used for a vehicle interior lamp (for example, an interior lamp, an instrument lamp, a reading lamp, or the like), light may be irradiated to one side of the lighting device 1 for a vehicle. Therefore, when the vehicular illumination device 1 is used as an interior lamp, such light distribution characteristics are preferably adopted.

The number, size, arrangement, and the like of the light emitting elements 12 are not limited to those exemplified, and may be appropriately changed according to the size, use, and the like of the vehicle illumination device 1. In addition, 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 may be provided on at least one of one surface and the other surface of the substrate 11. In the case illustrated in fig. 1 and 2, the resistor 13 is provided on the other surface of the substrate 11. Further, when 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, it is possible to suppress a phenomenon in which light emitted from the light emitting element 12 is absorbed by the resistor 13 or blocked by the resistor 13.

The resistor 13 is electrically connected to the wiring pattern 11 b. The resistor 13 can be connected in series with the light emitting element 12 via the wiring pattern 11 b.

The resistor 13 can be a current limiting resistor.

The resistor 13 may be one that adjusts the luminance of the light emitting element 12. Since the forward voltage characteristics of the light-emitting element 12 vary, the luminance (luminous flux, luminance, luminosity, and illuminance) of the light-emitting element 12 varies when the applied voltage between the anode (anode) terminal and the ground (ground) terminal is constant. Therefore, the value of the current flowing through the light emitting element 12 is within a predetermined range by the resistor 13 so that the luminance of the light emitting element 12 is within the predetermined range. At this time, the value of the current flowing through the light emitting element 12 can be made to fall within a predetermined range by changing the resistance value of the resistor 13.

The resistor 13 may be a surface-mount resistor, a resistor having a lead wire (oxide metal film resistor), a film-like resistor formed by a screen printing method, or the like, for example. The resistor 13 illustrated in fig. 1 and 2 is a surface-mount resistor. The number, size, arrangement, and the like of the resistors 13 are not limited to those exemplified, and may be appropriately changed in accordance with the number, specifications, and the like of the light emitting elements 12.

In addition, the film-shaped resistor is easy to adjust the resistance value. Therefore, when the resistance value is adjusted, a film-shaped resistor is preferably used. In this case, the resistance value can be adjusted as follows. First, a film-like resistor (resistor 13) is formed on the surface of the substrate 11 by a screen printing method or the like. Next, the resistor 13 is irradiated with laser light to remove a part of the resistor 13. The resistance value of the resistor 13 is changed by the size of the removed portion or the like. At this time, if a part of the resistor 13 is removed, the resistance value increases.

The diode 14 may be provided on at least one of one surface and the other surface of the substrate 11. In the case illustrated in fig. 1 and 2, the diode 14 is provided on the other surface of the substrate 11. Further, when 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, it is possible to suppress a phenomenon in which light emitted from the light emitting element 12 is absorbed by the diode 14 or blocked by the diode 14.

The diode 14 is electrically connected to the wiring pattern 11 b. The diode 14 can be connected in series with the light emitting element 12 via the wiring pattern 11 b.

In the case where at least one of the resistor 13 and the diode 14 is provided on the other surface of the substrate 11, at least one of the resistor 13 and the diode 14 may be connected in series with the light-emitting element 12 by the shape of the wiring patterns 11b provided on one surface and the other surface of the substrate 11 or the arrangement of the conductive through holes.

The diode 14 is provided to prevent a reverse voltage from being applied to the light emitting element 12 and to prevent a pulse noise (pulse noise) from being applied to the light emitting element 12 in a reverse direction.

Electronic components such as a transistor (transistor), a capacitor (capacitor), and an integrated circuit can be provided on the substrate 11 as needed.

Further, a coating portion covering a part of the wiring pattern 11b, a film-like resistor, or the like may be provided. For example, a film containing a white solder resist (solder resist), a film containing a glass material, or the like can be used as the coating portion.

The resistor 13, the diode 14, and the electronic components are not necessarily provided on the substrate 11. For example, the resistor 13, the diode 14, and the electronic components may be provided on a circuit board or the like provided in the vehicle lamp 100.

However, if the resistor 13, the diode 14, and the electronic components are provided on the substrate 11, the vehicle lighting device 1 can be protected and made multifunctional without modifying the existing vehicle lamp 100.

The base 20 is provided with a pair. The light emitting portion 10 (substrate 11) is provided between one of the bases 20 and the other base 20.

As shown in fig. 2, the base 20 includes a terminal portion 20a and a connecting portion 20 b.

A space can be provided inside the terminal portion 20 a. By providing a space inside the terminal portion 20a, the weight of the base 20 and thus the vehicle lighting device 1 can be reduced.

The external shape of the terminal portion 20a is not particularly limited. However, considering the case where the terminal portion 20a is attached to and detached from the bracket 103 of the vehicle lamp 100, it is preferable that at least a portion held by the bracket 103 of the terminal portion 20a has an external shape of a portion of a cylindrical shape or a column.

The external shape of the terminal portion 20a illustrated in fig. 2 is a part of a cylinder.

The base 20 (terminal portion 20a) can be provided with a flat surface 20a1 substantially parallel to the surface of the substrate 11. In this case, when the flat surface 20a1 is provided on the side of the substrate 11 where the light-emitting element 12 is provided, it is possible to suppress a phenomenon in which the distance between the mask (mask) for screen printing and the surface of the substrate 11 becomes long, or the cap 20 (terminal portion 20a) interferes with the light-emitting element 12 or the like when the light-emitting element 12 is mounted or the like.

Here, when the light-emitting element 12 is mounted on the substrate 11, the bonding material 300 such as solder paste or silver paste can be applied to a predetermined position (for example, on the mounting pad 11 ba) of the substrate 11 by a screen printing method.

Fig. 3(a) and 3(b) are schematic views illustrating the application of the bonding material 300 of the comparative example.

Fig. 3(b) is a schematic cross-sectional view taken along line a-a in fig. 3 (a).

As shown in fig. 3(a) and 3(b), the vehicle lighting device of the comparative example is provided with a substrate 11 and a base 220.

The base 220 is provided with a pair. The substrate 11 is disposed between the cap 220 and the cap 220. The base 220 has a cylindrical shape. The base 220 is not provided with the flat surface 20a1 substantially parallel to the surface of the substrate 11.

When the bonding material 300 is applied to a predetermined position on the substrate 11 by a screen printing method, a mask 301 having a hole 301a at the predetermined position is used. The mask 301 is provided substantially parallel to the surface of the substrate 11. At this time, if the distance L1 between the mask 301 and the substrate 11 becomes longer, the shape accuracy, the dimension accuracy, and the position accuracy of the joining material 300 applied to the substrate 11 become worse. Since the vehicle lighting device 201 of the comparative example includes the base 220 having a cylindrical shape, the mask 301 interferes with the outer peripheral surface of the base 220. Therefore, it is difficult to shorten the distance L1 between the mask 301 and the substrate 11.

The same applies to the case where the bonding material 300 is applied to the surface on the opposite side of the substrate 11.

Fig. 4(a) and 4(b) are schematic views illustrating the application of the bonding material 300 according to the present embodiment.

Fig. 4(B) is a schematic cross-sectional view taken along line B-B in fig. 4 (a).

In fig. 4(a) and 4(b), the connection portion 20b is omitted and depicted.

As described above, the vehicle lighting device 1 of the present embodiment is provided with the substrate 11 and the base 20. The base 20 is provided with a flat surface 20a1 substantially parallel to the surface of the substrate 11.

When the flat surface 20a1 is provided on the base 20, the mask 301 can be brought into contact with the flat surface 20a 1. Therefore, as shown in fig. 4(a) and 4(b), the distance L between the mask 301 and the substrate 11 can be shortened. If the distance L between the mask 301 and the substrate 11 can be shortened, the shape accuracy, the dimensional accuracy, and the positional accuracy of the bonding material 300 applied to the substrate 11 can be improved.

According to the findings obtained by the present inventors, when the distance L between the flat surface 20a1 and the substrate 11 in the direction perpendicular to the surface of the substrate 11 is 1.0mm or less, the shape accuracy, the dimensional accuracy, and the positional accuracy of the joining material 300 applied to the substrate 11 can be easily improved. In this case, the distance L may be 0mm, that is, the surface of the substrate 11 may be flush with the flat surface 20a 1.

Further, by providing the distance L in this manner, when the light-emitting element 12 or the like is placed on the bonding material 300 applied to the substrate 11 using a mounting device or the like, it is possible to suppress interference between the base 20 and the light-emitting element 12 or the like.

However, the distance L is not limited to the example.

In the case where no component or the like is mounted on the surface of the substrate 11 opposite to the side where the light-emitting element 12 is provided, it is not necessary to provide the flat surface 20a1 opposite to the side where 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 portion 103a1 of the holder 103. Therefore, the posture of the vehicle illumination device 1 can be stabilized, and a desired light distribution can be easily obtained.

The connection portion 20b is provided at an end portion of the base 20 on the substrate 11 side. The connecting portion 20b may have an L-shaped external shape. The connection portion 20b has a base portion 20b1 substantially parallel to the surface of the board 11, and a tip portion 20b2 extending in the thickness direction of the board 11. The distal end portion 20b2 is provided in the hole 11a of the substrate 11. That is, the pair of caps 20 each have a base portion 20b1 and a tip portion 20b2 substantially parallel to the surface of the substrate 11, and the tip portion 20b2 has one end connected to the base portion 20b1 and the other end provided in the hole 11 a. At this time, the distal end portion 20b2 may be pressed into the hole 11a, welded to the hole 11a, or bonded to the hole 11a with a conductive adhesive. That is, the cap 20 and the substrate 11 need only be electrically and mechanically connected.

Also, the front end portion 20b2 can be soldered to the connection pad 11 bb. The front end portion 20b2 can also be bonded to the connection pad 11bb by a conductive adhesive.

The terminal portion 20a and the connecting portion 20b can be integrally formed by die casting (die cast), press forming (press), sheet metal forming, or the like. The terminal portion 20a and the connecting portion 20b may be joined by welding, soldering, or the like.

The tip end portion 20b2 may be omitted.

Fig. 5 is a schematic perspective view for illustrating a case where the distal end portion 20b2 is omitted.

As shown in fig. 5, when the tip portion 20b2 is omitted, the base portion 20b1 may be connected to the board 11. For example, the base 20b1 can be welded to the connection pad 11 bb. Further, the base portion 20b1 can also be bonded to the connection pad 11bb by a conductive adhesive. That is, each of the pair of bases 20 has a base portion 20b1 substantially parallel to the surface of the substrate 11. The base portion 20b1 is mechanically and electrically connected to the portion of the substrate 11 where the connection pad 11bb is provided.

In this case, the hole 11a of the substrate 11 can be omitted. In this way, the structure of the vehicle illumination device 1 can be simplified.

However, if the tip end portion 20b2 and the hole 11a are provided, the posture of the substrate 11 can be stabilized, and the desired light distribution can be easily obtained. Further, the bonding strength between the substrate 11 and the base 20 can be improved.

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

With the vehicle lighting device 1 of the present embodiment, the light emitting element 12 can be easily mounted on the substrate 11 provided on the base 20. Further, since the light emitting portion 10 (substrate 11) can be directly held by the connecting portion 20b, the substrate 11 can be held by a simple structure. Further, the wiring pattern 11b and the base 20 can be electrically connected without providing a separate wiring or the like.

Fig. 6 is a schematic exploded view illustrating a vehicle lighting device 1a according to another embodiment.

As shown in fig. 6, the lighting device 1a for a vehicle is provided with a light emitting portion 10a and a base 21.

The light emitting section 10a is provided with a substrate 15 and a light emitting element 12. The light emitting unit 10a is not provided with the resistor 13 and the diode 14.

The substrate 15 has a plate shape. The width W3 of the end portions on both sides of the base plate 15 is shorter than the width W2 of the base 21. The width of the end 11c of the substrate 11 can be reduced for the substrate 15. The connection pad 11bb can be provided on the surface of the end portion 11 c.

The base 21 is provided with a pair. The external shape of the base 21 is not particularly limited. The external shape of the base 21 can be the same as the external shape of the terminal portion 20a, for example. The base 21 is provided with a recess 21 a. The recess 21a is open at an end surface of the base 21 on the substrate 15 side and a side surface of the base 21. Inside the recess 21a, an end portion 11c is provided. At this time, the end portion 11c may be press-fitted into the recess 21a, or a gap may be provided between the end portion 11c and the inner wall of the recess 21 a. Further, at least one of the end surface of the base 21 and the inner wall of the recess 21a can be welded to the connection pad 11bb or bonded thereto with a conductive adhesive.

That is, the pair of bases 21 each have a recess 21a opened at an end surface. The portion of the substrate 15 where the connection pad 11bb is provided in the recess 21 a.

By providing the end portion 11c inside the concave portion 21a, the posture of the substrate 15 can be stabilized, and a desired light distribution can be easily obtained. Further, the bonding strength between the substrate 15 and the base 21 can be improved.

The base 21 may be provided with a flat surface 21b substantially parallel to the surface of the substrate 15. The operation and effect of the flat surface 21b can be the same as those of the flat surface 20a1 described above.

The material of the base 21 can be the same as the material of the base 20, for example.

With the vehicle lighting device 1a of the present embodiment, the light emitting element 12 can be easily mounted on the substrate 15 provided on the base 21. Further, since the light emitting portion 10a (substrate 15) can be directly held by the recess 21a, the substrate 15 can be held by a simple structure. Further, the wiring pattern 11b and the cap 21 can be electrically connected without providing a separate wiring or the like.

Fig. 7 is a schematic perspective view illustrating a vehicle lighting device 1b according to another embodiment.

As shown in fig. 7, the lighting device 1b for a vehicle is provided with a light emitting unit 10 and a base 22.

In fig. 7, the resistor 13, the diode 14, and the like are omitted.

The base 22 is provided with a pair. The external shape of the base 22 is not particularly limited. The external shape of the base 22 can be the same as the external shape of the terminal portion 20a, for example. The base 22 is provided with a recess 22 a. The recess 22a is open at the end surface of the base 22 on the substrate 11 side. The vicinity of the end of the substrate 11 is provided inside the recess 22 a. In this case, the end of the substrate 11 may be press-fitted into the recess 22a, or a gap may be provided between the end of the substrate 11 and the inner wall of the recess 22 a. Further, at least either one of the end surface of the base 22 and the inner wall of the recess 22a can be welded to the connection pad 11bb or bonded thereto with a conductive adhesive.

In addition, even when a gap is provided between the end of the substrate 11 and the inner wall of the recess 22a, the end of the substrate 11 (the connection pad 11bb) can be brought into contact with the inner wall of the recess 22a by applying pressure to the base 22 to deform the base 22.

That is, the pair of bases 22 each have a recess 22a opened at an end surface. The portion of the substrate 11 provided with the connection pad 11bb is provided in the recess 22 a.

By providing the end portion of the substrate 11 in the recess 22a, the posture of the substrate 11 can be stabilized, and a desired light distribution can be easily obtained. Further, the bonding strength between the substrate 11 and the base 22 can be improved.

The base 22 may be provided with a flat surface 22b substantially parallel to the surface of the substrate 11. The operation and effect of the flat surface 22b can be the same as those of the flat surface 20a1 described above.

The material of the base 22 can be the same as the material of the base 20, for example.

With the vehicle lighting device 1b of the present embodiment, the light-emitting element 12 can be easily mounted on the substrate 11 provided on the base 22. Further, since the light emitting portion 10 (substrate 11) can be directly held by the recess 22a, the substrate 11 can be held by a simple structure. Further, the wiring pattern 11b and the cap 22 can be electrically connected without providing a separate wiring or the like.

Fig. 8 is a schematic side view illustrating a vehicle lighting device 1c according to another embodiment.

Fig. 9 is a schematic plan view illustrating a vehicle lighting device 1c according to another embodiment.

As shown in fig. 8 and 9, the vehicle lighting device 1c includes a light emitting portion 10 and a base 23.

In fig. 8 and 9, the resistor 13, the diode 14, and the like are omitted.

The base 23 is provided with a pair. The base 23 has a terminal portion 20a and a connecting portion 23 b.

The connecting portion 23b is provided at an end of the terminal portion 20a on the substrate 11 side. The connecting portion 23b is provided in a pair. The vicinity of the end of the substrate 11 is provided between the front end portions of the connection portions 23 b. The pair of connecting portions 23b hold the vicinity of the end portions of the substrate 11 by an elastic force. Further, the front end portion of the connection portion 23b is in contact with the connection pad 11 bb. That is, the pair of caps 23 respectively have a pair of connection portions 23b, and the pair of connection portions 23b sandwich a portion of the substrate 11 where the connection pad 11bb is provided.

Further, the leading end portion of the connection portion 23b may be soldered to the connection pad 11bb or bonded to the connection pad 11bb by a conductive adhesive.

The terminal portion 20a and the connecting portion 23b can be integrally formed by a die-casting method, a press-forming method, a sheet metal method, or the like. The terminal portion 20a and the connecting portion 23b may be joined by welding, soldering, or the like.

The base 23 may be provided with a flat surface 23a substantially parallel to the surface of the substrate 11. The operation and effect of the flat surface 23a can be similar to those of the flat surface 20a1 described above.

The material of the base 23 can be the same as the material of the base 20, for example.

With the vehicle lighting device 1c of the present embodiment, the light emitting element 12 can be easily mounted on the substrate 11 provided on the base 23. Further, since the light emitting portion 10 (substrate 11) can be directly held by the connecting portion 23b, the substrate 11 can be held by a simple structure. Further, the wiring pattern 11b and the cap 23 can be electrically connected without providing a separate wiring or the like.

As described above, the pair of bases 20(21, 22, 23) are directly connected to the portions of the substrates 11(15) where the connection pads 11bb are provided, respectively. Further, "direct connection" includes connection by elastic force, connection by pressure bonding, and connection by solder or conductive adhesive.

(vehicle lamp 100)

Fig. 10 is a schematic perspective view for illustrating the vehicle lamp 100 of the present embodiment.

In the following, the vehicle lighting device 1 described above is provided as an example. Although the case where one vehicle lighting device 1 is provided is exemplified, at least one vehicle lighting device 1 may be provided.

As shown in fig. 10, a vehicle lamp 100 is provided with a vehicle lighting device 1, a housing 101, a cover 102, and a bracket 103.

The frame 101 has a box shape with one end open. The frame 101 can be formed of, for example, a light-impermeable resin.

The cover 102 is provided to close the opening of the housing 101. The cover 102 may be formed of a resin having light transmittance. The cover 102 may have a function of a lens (lens) or the like, or may have a glare (glare) suppression function. The cover 102 is provided to the housing 101 so as to be openable and closable, or is provided to be detachable.

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. The brackets 103 are provided in a pair with respect to one vehicle lighting device 1. The bracket 103 holds the pair of bases 20 provided in the lighting device 1 for a vehicle by an elastic force. The holder 103 can be formed of metal such as phosphor bronze, for example. The holder 103 can be formed by, for example, a press forming method, a sheet metal method, or the like.

By mounting the vehicle lighting device 1 on the pair of brackets 103, the vehicle lighting device 1 and the brackets 103 are mechanically and electrically connected. A power supply or the like provided outside the vehicle lamp 100 is electrically connected to the pair of brackets 103. Further, a circuit board may be provided at least on one of the inner and outer surfaces of the housing 101, and the pair of holders 103 may be electrically connected to a power source or the like via the circuit board.

Fig. 11 is a schematic perspective view illustrating a holder 103a according to another embodiment.

As shown in fig. 11, a pair of brackets 103a is provided for one vehicle lighting device 1. The bracket 103a has a support portion 103a 1. The holder 103a may be one in which a support portion 103a1 is further provided on the holder 103.

That is, the pair of brackets 103a each have a support portion 103a1 that supports the flat surface 20a1 of the base 20. When the vehicle lighting device 1 is mounted on the pair of brackets 103a, the support portion 103a1 comes into contact with the flat surface 20a1 of the base 20. Therefore, the posture of the vehicle illumination device 1 can be stabilized, and a desired light distribution can be easily obtained.

(method of manufacturing Lighting device for vehicle)

First, the caps 20(21, 22, 23) are mechanically and electrically connected to the end portions of the substrates 11 (15).

For example, in the case of the vehicle lighting device 1 illustrated in fig. 1 and 2, the distal end portion 20b2 of the base 20 is provided in the hole 11a of the substrate 11, and the distal end portion 20b2 is soldered to the connection pad 11bb, or the distal end portion 20b2 is bonded to the connection pad 11bb with a conductive adhesive.

In the case of the vehicular illumination device 1 illustrated in fig. 5, the base portion 20b1 of the base 20 can be soldered to the connection pad 11bb, or the base portion 20b1 can be adhered to the connection pad 11bb by a conductive adhesive.

In the case of the vehicle lighting device 1a illustrated in fig. 6, the end portion 11c of the substrate 15 may be provided in the recess 21a of the base 21, and at least one of the end surface of the base 21 and the inner wall of the recess 21a may be welded to the connection pad 11bb or bonded thereto with a conductive adhesive.

In the case of the vehicle lighting device 1b illustrated in fig. 7, the end portion of the substrate 11 is provided in the recess 22a of the base 22, and at least one of the end surface of the base 22 and the inner wall of the recess 22a can be welded to the connection pad 11bb or bonded thereto with a conductive adhesive.

Further, the end portion (connection pad 11bb) of the substrate 11 may be brought into contact with the inner wall of the recess 22a by applying pressure to the base 22 to deform the base 22.

That is, the following steps can be included.

And a step of inserting the portion of the substrate 11 provided with the connection pad 11bb into the recess 22a of the base 22 opened at the end face.

And a step of deforming the base 22 by applying pressure to the base 22 so that the portion of the substrate 11 where the connection pad 11bb is provided contacts the inner wall of the recess 22 a.

In the case of the vehicle illumination device 1c illustrated in fig. 8 and 9, the vicinity of the end of the substrate 11 is provided between the connection portion 23b and the connection portion 23b, and the substrate 11 is held by the elastic force. Further, the leading end portion of the connection portion 23b may be soldered to the connection pad 11bb or bonded to the connection pad 11bb by a conductive adhesive.

Next, the light-emitting element 12 is mounted on one surface of the substrate 11 (15). Further, the resistor 13, the diode 14, and the like may be mounted on the surface of the substrate 11(15) opposite to the side on which the light emitting element 12 is provided, as necessary.

When mounting the light emitting element 12, the resistor 13, the diode 14, and the like, first, the bonding material 300 is applied to a predetermined position of the substrate 11 by a screen printing method. At this time, as illustrated in fig. 4(a) and 4(b), the mask 301 is brought into contact with the flat surface 20a1(21b, 22b, 23 a).

Then, the light-emitting element 12 and the like are mounted on the bonding material 300 applied on the substrate 11(15) using a mounting apparatus or the like.

Then, the bonding material 300 is melted by a heating furnace or the like and solidified, whereby the light-emitting element 12 or the like can be mounted on the surface of the substrate 11 (15).

As described above, the method for manufacturing the vehicle illumination device according to the present embodiment may include the following steps.

And a step of mechanically and electrically connecting the caps 20(21, 22, 23) to the end portions of the substrates 11 (15).

And a step of bringing the mask 301 for the screen printing method into contact with the flat surfaces 20a1(21b, 22b, 23a) of the bases 20(21, 22, 23) provided at the end portions on both sides of the substrate 11 (15).

And a step of applying the bonding material 300 to a predetermined position of the substrate 11(15) through the mask 301.

The contents of each step can be the same as those described above, and therefore, detailed description thereof is omitted.

Here, if the light emitting element 12 is mounted on the substrate 11(15) and the substrate 11(15) on which the light emitting element 12 is mounted is provided on the base 20(21, 22, 23), there is a possibility that the worker may touch the light emitting element 12 when the substrate 11(15) is provided on the base 20(21, 22, 23). When the worker touches the light emitting element 12, the light emitting element 12 may be contaminated or the light emitting element 12 may be damaged.

According to the method of manufacturing the vehicle lighting device of the present embodiment, since the light emitting element 12 is mounted on the substrate 11(15) provided in the base 20(21, 22, 23), the operator can be prevented from touching the light emitting element 12.

Further, since the mask 301 is brought into contact with the flat surface 20a1(21b, 22b, 23a), the distance L between the mask 301 and the substrate 11(15) can be shortened. Therefore, the shape accuracy, the dimensional accuracy, and the positional accuracy of the bonding material 300 applied to the substrate 11(15) can be improved.

While the embodiments of the present invention have been described above, these embodiments are merely examples and are not intended to limit the scope of the present invention. These novel embodiments can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof. Further, the above embodiments can be combined with each other.

Claims

1. A lighting device for a vehicle, characterized by comprising:

a pair of lamp caps;

a substrate provided between one of the bases and the other base and having a wiring pattern; and

at least one light emitting element electrically connected to the wiring pattern,

the pair of caps are each provided with a flat surface substantially parallel to the surface of the substrate.

2. The vehicular illumination device according to claim 1,

the wiring pattern has a connection pad which is provided with a connection pad,

the pair of lamp caps are respectively and directly connected with the part of the substrate, which is provided with the connecting welding pad.

3. The vehicular illumination device according to claim 2,

a hole penetrating the thickness direction of the substrate is arranged on the part of the substrate provided with the connecting welding pad,

the pair of caps each have a base portion and a tip portion, the base portion being substantially parallel to the surface of the substrate, one end side of the tip portion being connected to the base portion, and the other end side being provided in the hole.

4. The vehicular illumination device according to claim 2,

the pair of bases each have a base portion substantially parallel to a surface of the base plate,

the base portion is mechanically and electrically connected with the portion of the substrate where the connection pad is provided.

5. The vehicular illumination device according to claim 2,

the pair of bases each have a recess opened at an end surface,

the part of the substrate provided with the connecting welding pad is arranged in the concave part.

6. The vehicular illumination device according to claim 2,

the pair of lamp caps respectively have a pair of connecting portions that sandwich a portion of the substrate where the connection pad is provided.

7. A lamp for a vehicle, characterized by comprising:

the vehicular illumination device according to any one of claims 1 to 6; and

and a pair of brackets that hold a pair of bases provided in the vehicle lighting device.

8. The vehicular lamp according to claim 7,

the pair of brackets have support portions for supporting flat surfaces of the lamp head, respectively.