JP2022163778A - Vehicular illuminating device, and vehicular lighting fixture - Google Patents

Abstract

To provide a vehicular illuminating device that can improve reliability related to connection to a socket terminal, and a vehicular lighting fixture.SOLUTION: A vehicular illuminating device according to an embodiment can be fitted to a socket provided in a vehicular lighting fixture. The vehicular illuminating device comprises: a board; a wiring pattern provided on the board, and comprising a terminal electrically connected to a socket terminal provided in the socket; a light emitting element electrically connected to the wiring pattern; and a holding part provided between the terminal and an end part of the board on the side of the terminal, and holding a tip side of the socket terminal.SELECTED DRAWING: Figure 1

Description

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

Baseless wedge base bulbs have been used as vehicle lighting devices. A wedge-based bulb is an incandescent bulb. Therefore, from the viewpoint of power saving, long life, etc., wedge base light bulbs have come to be replaced with vehicle lighting devices equipped with light emitting diodes.

The wedge base light bulb is attached by being pushed into a socket provided in the vehicle lamp. When a vehicle lighting device having light emitting diodes is used instead of the wedge base light bulb, it is preferable that the socket in which the wedge base light bulb is mounted can be used as it is.

Therefore, there has been proposed a vehicle lighting device that includes a substrate on which light-emitting diodes are mounted and a housing to which a pair of leads (terminals) are attached. However, if the housing is provided, it becomes impossible to reduce the size and cost of the vehicle lighting device.
In this case, if a substrate provided with a pair of terminals is used instead of a housing provided with a pair of leads, the size and cost of the vehicle lighting device can be reduced. A substrate provided with a pair of terminals is inserted into a recess provided in the socket, and a portion of the substrate provided with the terminals is sandwiched between socket terminals provided inside the recess. Therefore, the vehicle lighting device is held by the socket terminal due to the elastic force of the socket terminal. Also, the vehicle lighting device is electrically connected to an external power supply or the like via the socket terminal.

In this case, the elastic force of the socket terminal increases or decreases depending on the amount of deformation of the socket terminal. Holding power may be weakened.

Since the vehicle lighting system is subject to vibrations caused by driving and vibrations from the engine, etc., if the force holding the vehicle lighting system becomes weak, the position of the vehicle lighting system may shift and the light distribution characteristics may change. There is a risk that the reliability of the electrical connection with an external power source or the like will be lowered, or that the vehicle lighting device will fall off the socket.
Therefore, it has been desired to develop a technique capable of improving the reliability of the connection with the socket terminal.

JP 2013-105652 A

The problem to be solved by the present invention is to provide a vehicle lighting device and a vehicle lamp capable of improving the reliability of connection with a socket terminal.

A vehicle lighting device according to an embodiment is a vehicle lighting device that can be attached to a socket provided in a vehicle lamp. The vehicle lighting device includes a substrate; a wiring pattern provided on the substrate and having terminals electrically connected to socket terminals provided on the socket; and a light emitting element electrically connected to the wiring pattern. and a holding portion provided between the terminal and the terminal-side end portion of the substrate and holding the tip side of the socket terminal.

According to the embodiments of the present invention, it is possible to provide a vehicle lighting device and a vehicle lamp capable of improving the reliability of connection with a socket terminal.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic perspective view for illustrating the vehicle lighting apparatus which concerns on 1st Embodiment. FIG. 4 is a schematic perspective view for illustrating connection by connection pads; (a) to (c) are schematic perspective views for illustrating holding portions according to other embodiments. It is a schematic perspective view for illustrating the vehicle lighting apparatus which concerns on 2nd Embodiment. 1 is a schematic diagram for illustrating a vehicle lamp according to an embodiment; FIG.

Hereinafter, embodiments will be illustrated with reference to the drawings. In addition, in each drawing, the same reference numerals are given to the same constituent elements, and detailed description thereof will be omitted as appropriate.
A vehicle lighting device according to the present embodiment is a vehicle lighting device that can be attached to a socket provided in a vehicle lamp. Vehicle lighting devices include, for example, interior lamps, meter lamps, reading lights, brake lights, direction indicator lights, taillights, and the like provided in automobiles and railway vehicles. However, the applications of the vehicle lighting device are not limited to these.

(Vehicle lighting device according to the first embodiment)
FIG. 1 is a schematic perspective view for illustrating a vehicle lighting device 1 according to the first embodiment. As shown in FIG. 1 , the vehicle lighting device 1 is provided with, for example, a light emitting portion 10 , a connection portion 20 , a positioning portion 30 and a cover 40 .

The light emitting section 10 has, for example, a substrate 11 and a light emitting element 12 .
The substrate 11 has a plate shape, for example, and has a surface 11a and a surface 11d facing the surface 11a. The planar shape of the substrate 11 is, for example, a portion of a circle containing the center point. however. The planar shape of the substrate 11 is not limited to the illustrated one. The planar shape of the substrate 11 may be, for example, a polygon. The planar shape of the substrate 11 can be appropriately changed according to the number and arrangement of the light emitting elements 12 .

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

When the amount of heat generated by the light emitting element 12 is large, it is preferable to form the substrate 11 using a material with high thermal conductivity from the viewpoint of heat dissipation. Examples of materials with high thermal conductivity include ceramics such as aluminum oxide and aluminum nitride, high thermal conductive resins, and metal core substrates. The high thermal conductive resin is, for example, a resin such as PET (polyethylene terephthalate) or nylon mixed with a filler made of aluminum oxide, carbon, or the like.

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

A wiring pattern 11b is provided on the surface 11a of the substrate 11 opposite to the connection portion 20 side. The wiring pattern 11b has, for example, mounting pads 11b1. The light emitting element 12 is electrically connected to the mounting pad 11b1. The wiring pattern 11b is made of, for example, a low resistance metal such as copper, aluminum or silver.

At least one light emitting element 12 can be provided on the surface 11 a of the substrate 11 .
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 bullet-shaped light emitting element having a lead wire. The light-emitting element 12 illustrated in FIG. 1 is a surface-mounted light-emitting element.

Also, the light emitting element 12 can be a chip-shaped light emitting element. A chip-shaped light emitting element can be mounted by COB (Chip On Board), for example. In this case, a chip-shaped light emitting element, a wiring for electrically connecting the chip-shaped light emitting element and the wiring pattern 11b, a frame-shaped member surrounding the chip-shaped light emitting element and the wiring, and inside the frame-shaped member A chip-shaped light emitting element and a sealing portion that covers the wiring can be provided on the surface 11 a of the substrate 11 . Also, the sealing portion can contain a phosphor. The phosphor can be, for example, a YAG-based phosphor (yttrium-aluminum-garnet-based phosphor). It should be noted that the types of phosphors are not limited to those exemplified. The type of phosphor can be appropriately changed according to the application of the vehicle lighting device 1 so as to obtain a desired emission color.

A light emitting surface of the light emitting element 12 can be substantially parallel to the surface 11 a of the substrate 11 . For example, the light emitting element 12 mainly emits light in a direction perpendicular to the surface 11 a of the substrate 11 .
The number, size, arrangement, and the like of the light emitting elements 12 are not limited to those illustrated, and can be appropriately changed according to the size, application, and the like of the vehicle lighting device 1 . 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 connecting portion 20 has, for example, a substrate 21, a circuit component 22, and a holding portion 23. As shown in FIG.
The substrate 21 has, for example, a plate shape and extends in a direction substantially perpendicular to the surface 11 d of the substrate 11 . When viewed from a direction parallel to the surface 11d of the substrate 11, the shape of the substrate 21 can be substantially rectangular, for example. The substrate 21 is provided on the surface 11 d of the substrate 11 . For example, the end surface 21c of the substrate 21 on the substrate 11 side can be adhered to the surface 11d of the substrate 11 .

The width dimension W of the substrate 21 can be 5.0 mm to 15.0 mm, eg, about 10.0 mm, to facilitate replacement with the wedge base bulb. However, the width dimension W of the substrate 21 is not limited to the illustrated one, and can be appropriately changed according to the dimension of the recess of the socket 101 into which the substrate 21 is inserted. Note that the width dimension W is, for example, the dimension of the substrate 21 in the direction orthogonal to the direction in which the vehicle lighting device 1 is inserted into the socket 101 .

The thickness T of the substrate 21 can be, for example, approximately 0.1 mm to 3.0 mm. In this case, if the thickness T of the substrate 21 is thin, the thickness of the holding portion 23, which will be described later, can be increased. Moreover, if the thickness T of the substrate 21 is thin, the manufacturing cost of the substrate 21 can be reduced, and the manufacturing cost of the vehicle lighting device 1 can be reduced. However, if the thickness T of the substrate 21 is too thin, the substrate 21 may be damaged when the vehicle lighting device 1 is inserted into the socket 101, for example. Therefore, the thickness T of the substrate 21 is preferably about 0.1 mm to 2.0 mm. If the thickness T of the substrate 21 is within this range, the thickness of the holding portion 23 can be optimized, the manufacturing cost of the substrate 21 can be reduced, and damage to the substrate 21 can be suppressed.

The material of the substrate 21 can be, for example, the same as the material of the substrate 11 described above. The heat generated in the light emitting element 12 is transmitted to the substrate 21 through the substrate 11, for example, and released from the substrate 21 to the outside through the socket 101. As shown in FIG. Therefore, considering suppression of temperature rise of the light emitting element 12, it is preferable to form the substrate 21 using a material with high thermal conductivity. Examples of materials with high thermal conductivity include ceramics such as aluminum oxide and aluminum nitride, high thermal conductive resins, and metal core substrates. In this case, the material of substrate 21 may be the same as or different from that of substrate 11 .

A wiring pattern 21 a 1 can be provided on the surface 21 a of the substrate 21 . The wiring pattern 21a1 can be formed from a low-resistance metal such as copper, aluminum, or silver.

The wiring pattern 21a1 has, for example, mounting pads 21a1a, terminals 21a1b, and connection pads 21a1c.
The mounting pads 21a1a can be provided in a region between the region of the surface 21a where the terminals 21a1b are provided and the end of the surface 21a on the substrate 11 side. A circuit component 22 is mounted on the mounting pad 21a1a.

A pair of terminals 21a1b can be provided near the end of the substrate 21 on the side opposite to the light emitting section 10 side. When the substrate 21 is attached to the socket 101 , the pair of terminals 21 a 1 b are electrically connected to the socket terminals 101 a and 101 b provided on the socket 101 . In this case, by electrically connecting the socket terminal 101a provided in the socket 101 to one terminal 21a1b, the socket terminal 101a is connected to one polarity of the light emitting element 12 via the wiring pattern 21a1 and the wiring pattern 11b. It can be electrically connected to the electrodes. Further, by electrically connecting the socket terminal 101b to the other terminal 21a1b, the socket terminal 101b is electrically connected to the electrode of the other polarity of the light emitting element 12 via the wiring pattern 21a1 and the wiring pattern 11b. be able to.
That is, the wiring pattern 21 a 1 is provided on the substrate 21 and has terminals 21 a 1 b electrically connected to the socket terminals 101 a and 101 b provided on the socket 101 .
Also, the light emitting element 12 is electrically connected to the wiring pattern 21a1 via the wiring pattern 11b.

Further, in the case of the vehicle lighting device 1 illustrated in FIG. can be provided. In this case, the terminals 21a1b provided on the surface 21b can be provided at positions facing the terminals 21a1b provided on the surface 21a. The terminals 21a1b provided on the surface 21b can be electrically connected to the terminals 21a1b provided on the surface 21a through conductive vias. If the terminals 21a1b are provided on the surface 21a and the surface 21b, the reliability of the electrical connection between the pair of terminals 21a1b and the socket terminals 101a and 101b provided on the socket 101 can be improved. .

FIG. 2 is a schematic perspective view for illustrating connection by the connection pad 11c and the connection pad 21a1c.
As shown in FIGS. 1 and 2, a pair of connection pads 21a1c can be provided in the vicinity of the end of the substrate 21 on the light emitting section 10 side. A pair of connection pads 11 c are provided on the surface 11 d of the substrate 11 . The pair of connection pads 11c are electrically connected to the wiring pattern 11b provided on the surface 11a of the substrate 11 through conductive vias or the like.

As shown in FIG. 2 , the connection pad 21 a 1 c and the connection pad 11 c are electrically connected by the joint 24 . The joint portion 24 is formed by soldering, for example. That is, the wiring pattern 21 a 1 provided on the substrate 21 is electrically connected to the wiring pattern 11 b provided on the substrate 11 through the joint portion 24 .

Circuit components 22 may be, for example, diodes 22a, resistors 22b, capacitors 22c, and the like.
Since the wedge base bulb is an incandescent bulb, one of a pair of leads can be electrically connected to the positive side of the power supply and the other lead can be electrically connected to the negative side of the power supply. That is, wedge-based bulbs are non-polar. On the other hand, the light emitting element 12 such as a light emitting diode has a polarity. Therefore, a diode can be provided to prevent a reverse voltage from being applied to the light emitting element 12 .

Moreover, considering the replacement with the wedge-based light bulb, it is preferable to provide the vehicle lighting device 1 with a non-polar circuit. If the vehicle lighting device 1 is provided with a non-polar circuit, there is no directivity when it is attached to the socket 101, similarly to the wedge base light bulb. Therefore, the mounting work of the vehicle lighting device 1 is facilitated.

For example, if a bridge circuit (bridge diode) is configured using four diodes, the vehicle lighting device 1 can be provided with a non-polar circuit. The diode 22a illustrated in FIG. 1 is a so-called two-element diode. If the diode 22a is a two-element diode, the two diodes 22a can be used to configure a bridge circuit, so the mounting area can be reduced. Therefore, it becomes easy to match the width dimension W of the substrate 21 with the width dimension of the portion where the lead of the wedge base bulb is provided.

The resistor 22b can be, for example, a surface-mounted resistor, a resistor having lead wires (metal oxide film resistor), or a film resistor formed using a screen printing method or the like. Note that the resistor 22b illustrated in FIG. 1 is a surface mount type resistor. Since the surface-mounted resistor can reduce the mounting area, it is easy to match the width W of the substrate 21 to the width of the lead-mounted portion of the wedge base bulb.

Here, since the forward voltage characteristics of the light emitting element 12 vary, if the voltage applied between the anode terminal and the ground terminal is constant, the brightness of the light emitted from the light emitting element 12 (luminous flux, luminance) , luminous intensity, and illuminance). Therefore, the value of the current flowing through the light emitting element 12 is kept within a predetermined range by the resistor 22b so that the brightness of the light emitted from the light emitting element 12 is within a predetermined range. In this case, by changing the resistance value of the resistor 22b, the value of the current flowing through the light emitting element 12 can be kept within a predetermined range.

For example, if the resistor 22b is a surface-mounted resistor or a resistor having lead wires, the resistor 22b having an appropriate resistance value is selected according to the forward voltage characteristics of the light emitting element 12 . For example, if the resistor 22b is a film resistor, removing part of the resistor 22b can increase the resistance value.

In addition, the resistor 22b can also serve to prevent an excessive current from flowing through the light emitting element 12. FIG.
The number, size, arrangement, and the like of the resistors 22b are not limited to those illustrated, and can be appropriately changed according to the number and specifications of the light emitting elements 12. FIG.

The capacitor 22c can be provided, for example, as a countermeasure against noise or for smoothing the voltage. The capacitor 22c can be, for example, a surface mount capacitor 22c. Since the mounting area can be reduced by using the surface-mounted capacitor 22c, the width dimension W of the substrate 21 can be easily matched with the width dimension of the portion where the leads of the wedge base bulb are provided.

Although the diode 22a, the resistor 22b, and the capacitor 22c are provided on the surface 21a, for example, at least part of these elements can be provided on the surface 21b facing the surface 21a. In this case, a wiring pattern can be provided on the surface 21b, and at least some of these elements can be electrically connected to the wiring pattern. Moreover, conductive vias are provided to penetrate the substrate 21 in the thickness direction, and the conductive vias can electrically connect the wiring pattern 21a1 provided on the surface 21a and the wiring pattern provided on the surface 21b.

Further, for example, at least part of these elements can be provided on the surface 11d of the substrate 11, which faces the surface 11a. In this case, a wiring pattern can be provided on the surface 11d and at least some of these elements can be electrically connected to the wiring pattern. Further, conductive vias are provided to penetrate the substrate 11 in the thickness direction, and the conductive vias can electrically connect the wiring pattern 11b provided on the surface 11a and the wiring pattern provided on the surface 11d.

Also, the circuit component 22 is not limited to the illustrated one. For example, circuit component 22 can be a passive or active device used to construct a light emitting circuit with light emitting element 12 . For example, the circuit component 22 may be, in addition to those described above, a positive characteristic thermistor, a negative characteristic thermistor, an inductor, a surge absorber, a varistor, a transistor such as an FET or a bipolar transistor, a Zener diode, an integrated circuit, an arithmetic element, or the like. . The integrated circuit can include, for example, at least one of a flashing circuit, a constant current circuit, and a lighting circuit (drive circuit).

At least part of the circuit component 22 may be provided in the housing 102 of the vehicle lamp 100 to which the vehicle lighting device 1 is mounted. In this way, the configuration of the vehicle lighting device 1 can be simplified, so that the cost of the vehicle lighting device 1 can be reduced. However, if the circuit component 22 is provided in the vehicle lighting device 1, even if the socket in which the wedge base light bulb is mounted is used as it is, the vehicle lighting device 1 can be protected and multi-functionalized. .

Here, when the vehicle lighting device 1 (substrate 21) is attached to the socket 101 of the vehicle lamp 100, the portion of the substrate 21 provided with the terminals 21a1b is connected to the socket terminals 101a and 101b provided in the socket 101. sandwiched between The vehicle lighting device 1 is held by the socket terminals 101a and 101b due to the elastic force of the socket terminals 101a and 101b. In addition, the vehicle lighting device 1 is electrically connected to an external power supply or the like via the socket terminals 101a and 101b.

In this case, the elastic force of the socket terminals 101a and 101b increases or decreases depending on the amount of deformation of the socket terminals 101a and 101b. For example, the elastic force of the socket terminals 101a and 101b varies depending on the thickness of the portion of the vehicle lighting device 1 sandwiched between the socket terminals 101a and 101b (the thickness of the substrate 21 and the thickness of the terminals 21a1b). Therefore, the force for holding the vehicle lighting device 1 may be weakened due to manufacturing errors in the dimensions of the socket terminals 101a and 101b, manufacturing errors in the thickness of the substrate 21, manufacturing errors in the thickness of the terminals 21a1b, and the like.

Since the vehicle lighting device 1 is subjected to vibrations caused by traveling and vibrations from the engine and the like, when the force holding the vehicle lighting device 1 becomes weak, the position of the vehicle lighting device 1 shifts and the light distribution characteristics deteriorate. change, the reliability of the electrical connection with an external power supply or the like may deteriorate, or the vehicle lighting device 1 may fall out of the socket 101 .

Therefore, the connecting portion 20 is provided with a holding portion 23 that holds the tip end sides of the socket terminals 101a and 101b.
The holding portion 23 can be provided, for example, in the vicinity of the end of the substrate 21 on the terminal 21a1b side. The holding part 23 can be provided, for example, between the terminal 21a1b and the end of the substrate 21 on the terminal 21a1b side.

Further, for example, a pad 23a can be provided on the surface 21a of the substrate 21 . The pad 23a can be provided between the terminal 21a1b and the end of the substrate 21 on the terminal 21a1b side. When the pad 23a is provided, the holding part 23 can be provided on the pad 23a.

Also, the pads 23a can be provided on the surface of the substrate 21 on which the wiring pattern 21a1 is provided. In this way, the pad 23a can be formed together with the wiring pattern 21a1. In this case, the material and thickness of the pad 23a can be the same as the material and thickness of the terminal 21a1b.

The holding portion 23 can be bonded to the pad 23a using, for example, a low melting point metal such as solder or an adhesive. The holding portion 23 has a plate-like shape and can be made of, for example, a metal such as aluminum alloy or stainless steel, an organic material such as resin, or an inorganic material such as ceramics.
Note that when the holding portion 23 is made of an insulating material such as resin or ceramics, one holding portion 23 can be provided for a pair of terminals 21a1b.

The terminal 21a1b can also be provided in the area where the pad 23a is provided, and the holding portion 23 can be bonded onto the terminal 21a1b. Alternatively, the holding portion 23 can be directly bonded to the surface 21a of the substrate 21 without providing the pad 23a. However, if the holding portion 23 is joined to the pad 23a and the terminal 21a1b, for example, in the step of mounting the circuit component 22, the holding portion 23 can be joined to the pad 23a and the terminal 21a1b. By doing so, productivity can be improved and manufacturing costs can be reduced.

When the vehicle lighting device 1 is attached to the socket 101 of the vehicle lamp 100, the tip sides of the socket terminals 101a and 101b come into contact with the side surface and the edge of the holding portion 23 on the light emitting portion 10 side. Therefore, for example, when vibration or the like is applied to the vehicle lighting device 1 , the tip sides of the socket terminals 101 a and 101 b are caught by the side surfaces and edges of the holding portion 23 . Therefore, the position of the vehicle lighting device 1 is displaced, the light distribution characteristics are changed, the reliability of the electrical connection with an external power source is lowered, and the vehicle lighting device 1 may come off from the socket 101 . can be suppressed. That is, if holding portion 23 is provided, reliability of connection with socket terminals 101a and 101b can be improved.

In this case, if the thickness of the portion of the vehicle lighting device 1 where the holding portion 23 is provided is too thin, the force for holding the vehicle lighting device 1 becomes weak. If the portion of the vehicle lighting device 1 where the holding portion 23 is provided is too thick, it becomes difficult to attach the vehicle lighting device 1 to the socket 101 . For example, the thickness of the portion of the vehicle lighting device 1 where the holding portion 23 is provided can be about 0.1 mm to 0.3 mm.

At least one holding portion 23 can be provided. However, as shown in FIG. 1, if a pair of holding portions 23 are provided, it is possible to prevent the vehicle lighting device 1 from tilting. That is, if a pair of holding portions 23 are provided, the reliability of connection with socket terminals 101a and 101b can be further improved.

1 illustrates the holding portion 23 provided on the surface 21a side of the substrate 21, the holding portion 23 can be provided on at least one of the surface 21a side and the surface 21b side of the substrate 21. . In this case, if the number of holding portions 23 is increased, the reliability of connection with socket terminals 101a and 101b can be further improved, but the force required to attach and detach vehicle lighting device 1 is increased. Therefore, it is preferable that the number and arrangement of the holding portions 23 are appropriately determined in consideration of the vibration applied to the vehicle lighting device 1 and maintainability.

Next, returning to FIG. 1, the positioning portion 30 and the cover 40 will be described.
As described above, the connection portion 20 is connected to the surface 11d of the substrate 11 using an adhesive or the like. When the connecting portion 20 is connected to the substrate 11, if there is a positional deviation, the light distribution characteristics may fluctuate. Further, if the positional deviation becomes excessively large, there is a possibility that a defect will occur in the joint portion 24 described above. In this case, if a jig is used to connect the connecting portion 20 to the substrate 11, it may be difficult to keep the positional deviation within a predetermined range depending on the precision of the jig. In addition, if the operator corrects the positional deviation, the number of man-hours increases, which may increase the manufacturing cost.

Therefore, the vehicle lighting device 1 is provided with the positioning portion 30 . The positioning part 30 has, for example, a convex part 31 provided on the substrate 21 and a concave part 32 provided on the substrate 11 . By fitting the convex portion 31 provided on the substrate 21 into the concave portion 32 provided on the substrate 11, the connecting portion 20 and the substrate 11 can be aligned.

For example, the convex portion 31 can be formed integrally with the substrate 21 . When the convex portion 31 is formed integrally with the substrate 21 , the thickness and material of the convex portion 31 can be the same as the thickness T and material of the substrate 21 . For example, the convex portion 31 can be formed by notching the vicinity of the edge of the substrate 21 on the substrate 11 side. Further, for example, the convex portion 31 can be an element (separate part) attached to the substrate 21 . When the convex portion 31 is used as an element to be attached to the substrate 21, the convex portion 31 can be adhered to the end surface 21c of the substrate 21 on the substrate 11 side, or the convex portion 31 can be embedded.

At least one positioning part 30 can be provided. In this case, it is preferable to provide a pair of positioning portions 30 as shown in FIG. If a pair of positioning parts 30 are provided, the positioning accuracy can be improved.

The cover 40 can be provided on the light emitting side of the light emitting section 10 . For example, the cover 40 can be provided so as to cover the surface 11 a of the substrate 11 . The shape of the cover 40 can be appropriately changed according to the light distribution characteristics required for the vehicle lighting device 1 and the like.

The cover 40 may be transparent or colored. It is also possible to scatter the light by providing unevenness on the light exit surface of the cover 40 . Cover 40 may also be coated with or include light scattering particles, such as particles of titanium oxide, or phosphor. A film containing a material with high light reflectance (for example, aluminum) may be provided on the inner and outer walls of the cover 40 to give the cover 40 a reflector function.

Note that the cover 40 can also be omitted. However, if the cover 40 is provided, it is possible to suppress the external force from being applied to the light emitting element 12 and the like. Further, if the cover 40 has the function of an optical element such as a lens, the degree of freedom in optical design of the vehicle lamp 100 can be increased.

Also, a cover 41 that covers the circuit component 22 may be further provided. The cover 41 can cover the area of the substrate 21 where the circuit component 22 is provided. In this case, the area of the substrate 21 where the terminals 20 a 1 b are provided can be exposed from the cover 41 . Note that the cover 41 is not necessarily required, and may be provided as required.

FIGS. 3A to 3C are schematic perspective views for illustrating holding portions 123 to 333 according to other embodiments.
As shown in FIG. 3A, the holding portion 123 has a columnar shape and can be provided near the end of the substrate 21 on the terminal 21a1b side. The holding portion 123 can protrude from at least one of the surface 21 a and the surface 21 b of the substrate 21 . For example, the holding portion 123 can be adhered or pressed into a hole penetrating between the surface 21a and the surface 21b of the substrate 21 . Moreover, the holding part 123 can also be adhered or press-fitted, for example, to the inside of a groove that opens to the surface 21a, the surface 21b, and the end of the substrate 21 .
When the vehicle lighting device 1 is attached to the socket 101 of the vehicle lamp 100 , the tip sides of the socket terminals 101 a and 101 b come into contact with the side surfaces and edges of the holding portion 123 .

As shown in FIG. 3B, the holding portion 223 has a plate shape and can be provided at the end of the substrate 21 on the terminal 21a1b side. The holding portion 223 can protrude from at least one of the surface 21 a and the surface 21 b of the substrate 21 . The holding part 223 can be adhered or welded to the edge of the substrate 21 .
When the vehicle lighting device 1 is attached to the socket 101 of the vehicle lamp 100 , the tip sides of the socket terminals 101 a and 101 b come into contact with the side surfaces and edges of the holding portion 223 .

As shown in FIG. 3C, the holding portion 323 can be provided at the end of the substrate 21 on the terminal 21a1b side. The holding part 323 has, for example, a portion facing the end of the substrate 21 and a portion facing the surface 21 a or the surface 21 b of the substrate 21 . Further, the holding part 323 can have, for example, a portion facing the edge of the substrate 21 , a portion facing the surface 21 a of the substrate 21 , and a portion facing the surface 21 b of the substrate 21 . The holding portion 323 can be formed by, for example, bending a plate material or molding by injection molding or the like.
When the vehicle lighting device 1 is attached to the socket 101 of the vehicle lamp 100 , the tip sides of the socket terminals 101 a and 101 b come into contact with the side surfaces and edges of the holding portion 323 .

The materials, number, etc. of the holding portions 123 to 333 can be, for example, the same as those of the holding portion 23 described above.
If the holding portions 123 to 333 are provided, the same functions and effects as those of the holding portion 23 described above can be obtained.

In the case of the holding portions 123 to 333 or the holding portion 23 without the pad 23a, the holding portion can be directly bonded to the substrate 21. FIG.

(Vehicle lighting device according to the second embodiment)
FIG. 4 is a schematic perspective view for illustrating the vehicle lighting device 1a according to the second embodiment. As shown in FIG. 4, the vehicle lighting device 1a includes, for example, a substrate 51, a light emitting element 12, a circuit component 22, a holding portion 23, and a cover 40a.

The substrate 51 has a plate-like shape and extends in a direction in which the vehicle lighting device 1a is inserted into the socket 101, for example. The planar shape of the substrate 51 can be, for example, substantially rectangular. The thickness T2 and width dimension W1 of the substrate 51 can be, for example, the same as the thickness T and width dimension W of the substrate 21 described above. The material of the substrate 51 can be, for example, the same as the material of the substrate 21 described above.

A surface 51a of the substrate 51 is provided with a wiring pattern 51a1. The wiring pattern 51a1 is made of, for example, a low-resistance metal such as copper, aluminum, or silver.

The wiring pattern 51a1 has, for example, a mounting pad 21a1a, a terminal 21a1b, and a mounting pad 11b1.
The mounting pad 11b1 can be provided near one end of the substrate 51 . The light emitting element 12 is mounted on the mounting pad 11b1.

The mounting pads 21a1a can be provided in the area between the area where the terminals 21a1b are provided and the area where the mounting pads 11b1 are provided on the surface 51a. A circuit component 22 is mounted on the mounting pad 21a1a.

A pair of terminals 21a1b can be provided near the end of the substrate 51 on the side opposite to the light emitting element 12 (mounting pad 11b1) side. When the substrate 51 is attached to the socket 101 , the pair of terminals 21 a 1 b are electrically connected to the socket terminals 101 a and 101 b provided on the socket 101 . In this case, by electrically connecting the socket terminal 101a provided in the socket 101 to one terminal 21a1b, the socket terminal 101a is electrically connected to the electrode of one polarity of the light emitting element 12 via the wiring pattern 51a1. can be connected to Also, by electrically connecting the socket terminal 101b to the other terminal 21a1b, the socket terminal 101b can be electrically connected to the electrode of the other polarity of the light emitting element 12 via the wiring pattern 51a1.

In the case of the vehicle lighting device 1a illustrated in FIG. 4, the terminal 21a1b is provided on the surface 51a of the substrate 51. 51b. In this case, the terminals 21a1b provided on the surface 51b can be provided at positions facing the terminals 21a1b provided on the surface 51a. The terminal 21a1b provided on the surface 51b can be electrically connected to the terminal 21a1b provided on the surface 51a through a conductive via. If the terminals 21a1b are provided on the surfaces 51a and 51b, the reliability of the electrical connection between the pair of terminals 21a1b and the socket terminals 101a and 101b provided on the socket 101 can be improved. .

The cover 40 a can be provided on the light emitting side of the light emitting element 12 . For example, cover 40a can be attached to surface 51a of substrate 51 . The shape of the cover 40a can be appropriately changed according to the light distribution characteristics required for the vehicle lighting device 1a. The shape, material, etc. of the cover 40a can be the same as those of the cover 40 described above.
Moreover, similarly to the vehicle lighting device 1 described above, a cover 41a that covers the circuit component 22 can be further provided as necessary. The cover 41a can be similar to the cover 41 described above.

Since the holding portion 23 is also provided in the vehicle lighting device 1a according to the present embodiment, the operation and effect of the holding portion 23 described above can be enjoyed. Incidentally, when the holding portions 123 to 333 described above are provided instead of the holding portion 23, the functions and effects of the holding portions 123 to 333 can be obtained.

(Vehicle lamp 100)
FIG. 5 is a schematic diagram illustrating the vehicle lamp 100 according to the present embodiment.
In addition, although the case where the one vehicle lighting apparatus 1 mentioned above is provided below is illustrated as an example, at least one vehicle lighting apparatus 1 should just be provided. Moreover, at least one vehicle lighting device 1a described above may be provided, or the vehicle lighting device 1 and the vehicle lighting device 1a may be provided.

As shown in FIG. 5 , the vehicle lamp 100 can be provided with the vehicle lighting device 1 , the socket 101 , the housing 102 and the cover 103 .

The socket 101 can be provided in the housing 102 . The vehicle lighting device 1 can be attached to the socket 101 . The socket 101 is made of, for example, an insulating material such as resin.
5 illustrates the case where the socket 101 and the housing 102 are separately provided, the socket 101 and the housing 102 may be integrally formed.

The socket 101 can be provided with a recess opening at one end. The vehicle lighting device 1 (substrate 21) is inserted into the recess. Further, a socket terminal 101a corresponding to one voltage polarity (eg, plus) and a socket terminal 101b corresponding to the other voltage polarity (eg, minus) can be provided inside the recess. As described above, if the vehicle lighting device 1 is provided with a non-polar circuit, the mounting direction of the vehicle lighting device 1 (board 21) is not limited.

The socket terminals 101a and 101b are elastically deformable. When the board 21 is inserted into the recess, each of the socket terminals 101a and 101b is electrically connected to the terminal 21a1b. Also, the tip sides of the socket terminals 101 a and 101 b contact the side surfaces and edges of the holding portion 23 . Therefore, for example, when vibration or the like is applied to the vehicle lighting device 1, the position of the vehicle lighting device 1 shifts and the light distribution characteristics change, or the reliability of the electrical connection with an external power supply or the like deteriorates. Also, it is possible to prevent the vehicle lighting device 1 from falling off from the socket 101 .

That is, the socket 101 has socket terminals 101 a and 101 b held by the holding portion 23 provided in the vehicle lighting device 1 .

A power source or the like provided outside the vehicle lamp 100 can be electrically connected to the socket terminals 101a and 101b. A circuit board may be provided on at least one of the inside and outside of housing 102, and socket terminals 101a and 101b and a power source may be electrically connected via the circuit board.

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

In addition, optical elements such as reflectors and lenses can be provided inside the housing 102 .

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

1 vehicle lighting device 1a vehicle lighting device 10 light emitting part 12 light emitting element 20 connection part 20a1 wiring pattern 21a1b terminal 23 holding part 23a pad 100 vehicle lamp 101 socket 101a socket terminal, 101b socket terminal, 123 holding portion, 223 holding portion, 323 holding portion

Claims (5)

A vehicle lighting device attachable to a socket provided in a vehicle lamp,
a substrate;
a wiring pattern provided on the substrate and having terminals electrically connected to socket terminals provided on the socket;
a light emitting element electrically connected to the wiring pattern;
a holding portion provided between the terminal and an end portion of the substrate on the terminal side and holding the tip side of the socket terminal;
A vehicle lighting device comprising: Further comprising a pad provided on the substrate,
the pad is provided between the terminal and an end of the substrate on the terminal side;
The vehicle lighting device according to claim 1, wherein the holding portion is provided on the pad. 3. The vehicle lighting device according to claim 2, wherein the pad is provided on a surface of the substrate on which the wiring pattern is provided. The vehicle lighting device according to claim 1, wherein the holding portion is joined to the substrate. A vehicle lighting device according to any one of claims 1 to 4;
a socket having a socket terminal held by a holding portion provided in the vehicle lighting device;
A vehicle lamp equipped with

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