JP6713904B2 - Light source module for vehicle lamp and vehicle lamp - Google Patents

Description

The present invention relates to a light source module for a vehicle lamp and a vehicle lamp.

2. Description of the Related Art Recent vehicle lighting fixtures are gradually increasing in number with LEDs as a light source, as the brightness and cost of light emitting diodes (LEDs) are increasing. LEDs have the advantages of long life and low power consumption. On the other hand, when the temperature rises, the luminous efficiency is reduced and the life is shortened. Therefore, it is necessary to efficiently radiate the heat generated by the LED to the outside by using a heat sink (for example, refer to Patent Document 1 below).

For example, Patent Document 1 below discloses a configuration in which a circuit board on which an LED and a drive circuit for driving the LED are mounted is attached to a heat sink, and the heat sink is integrally attached to a connector.

However, in the case of such a configuration, it is necessary to mount the mounting components forming the LED and the drive circuit on the same surface of the circuit board. In this case, the size of the circuit board is increased, and thus the vehicle lamp is increased in size. Moreover, the assembly of the heat sink and the connector becomes very complicated.

JP, 2011-171277, A

The present invention has been proposed in view of such conventional circumstances, and is a light source module for a vehicular lamp that is excellent in cooling performance and can be downsized, and such a light source module for a vehicular lamp. It is an object of the present invention to provide a vehicle lamp including the above.

In order to achieve the above object, the present invention provides the following means.
[1] A first substrate provided with a light emitting element,
A second substrate provided with a drive circuit for driving the light emitting element;
A first housing provided with a heat dissipation portion for dissipating heat generated by the light emitting element;
A second housing provided with a connector portion electrically connected to the first substrate and the second substrate,
The first substrate is attached to the first housing,
The said 2nd board|substrate is attached to the said 2nd housing|casing in the state which is not in contact with the said 1st housing|casing, The light source module for vehicle lamps characterized by the above-mentioned.
[2] The first casing includes a front wall portion and a peripheral wall portion that surrounds a periphery of the front wall portion on the back side.
The second housing has a rear wall portion that faces the back surface of the front wall portion with a space in between, and is attached to the back surface side of the first housing,
The first substrate is attached to the front side of the front wall portion,
The said 2nd board|substrate is attached to the front surface side of the said rear wall part in the state which is not in contact with the said surrounding wall part, The light source module for vehicle lamps as described in said [1] characterized by the above-mentioned.
[3] The connector portion has a lead terminal attached in a state of penetrating the rear wall portion in the front-rear direction,
The lead terminal is inserted into a first hole portion provided in the first substrate and a second hole portion provided in the second substrate, respectively. Electrically connected to the second substrate,
The light source module for a vehicle lighting device according to [2], wherein the front wall portion is provided with a third hole portion that penetrates the lead terminal in a non-contact state.
[4] The second housing has a pedestal portion protruding from the front surface of the rear wall portion,
The light source module for a vehicle lighting device according to [2] or [3], wherein the second substrate is attached to the pedestal part with a space from the front surface of the rear wall part.
[5] The light source module for a vehicular lamp according to [4], wherein the second substrate has a fourth hole that penetrates a protrusion provided on the pedestal.
[6] The vehicular lamp according to any one of [1] to [5], wherein the heat radiating portion is configured by at least a part or all of the first housing. Light source module.
[7] The light source module for a vehicle lamp according to any one of [1] to [6], wherein the light emitting element emits any one of red light, orange light, and white light. ..
[8] Among the light emitting elements that emit any of the red light, the orange light, and the white light, at least two or more light emitting elements having different colors are mounted on the first substrate. [7] The light source module for a vehicle lamp according to [7].
[9] A vehicle lamp including the vehicle light source module according to any one of [1] to [8].

As described above, according to the present invention, a light source module for a vehicular lamp that has excellent cooling performance and can be downsized, and a vehicular lamp including such a light source module for a vehicular lamp are provided. It is possible.

1 is a perspective view showing a configuration of a light source module for a vehicle lamp according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing a configuration of a light source module for vehicle lighting shown in FIG. 1. It is sectional drawing which shows the structure of the light source module for vehicle lamps shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Note that, in the drawings used in the following description, in order to make the features easy to understand, there are cases in which characteristic portions are enlarged for convenience, and the dimensional ratios of the respective constituent elements are not necessarily the same as the actual ones. Make it not exist.

First, as one embodiment of the present invention, a light source module 1 for a vehicular lamp shown in FIGS. 1 to 3, for example, will be described. 1. FIG. 1 is a perspective view showing the configuration of the light source module 1 for a vehicle lamp. FIG. 2 is an exploded perspective view showing a configuration of the light source module 1 for a vehicle lamp. FIG. 3 is a cross-sectional view showing the configuration of the light source module 1 for a vehicle lamp. In the drawings shown below, an XYZ orthogonal coordinate system is set, and the X-axis direction is the front-back direction of the vehicle lamp light source module 1, the Y-axis direction is the left-right direction of the vehicle lamp light source module 1, and the Z-axis direction. The vertical direction of the light source module 1 for a vehicle lamp will be shown respectively.

As shown in FIGS. 1 to 3, the light source module 1 for a vehicle lamp of the present embodiment is a vehicle LED lamp, and constitutes, for example, a socket with a coupler called DICS (Direct Insert Coupler Socket). ..

Specifically, this vehicle lamp light source module 1 includes a first substrate 3 provided with a light emitting element 2, a second substrate 5 provided with a drive circuit 4 for driving the light emitting element 2, and a light emitting element. The first housing 7 provided with the heat dissipation portion 6 for dissipating the heat generated by the second body 2 and the second housing 7 provided with the connector portion 8 electrically connected to the first substrate 3 and the second substrate 5. A housing 9 is provided.

The light emitting element 2 is, for example, a chip LED (SMD LED) that emits white light, and is mounted on one surface (front surface) of the first substrate 3. Further, as the chip LED, a high output type LED for vehicle lighting is used. Note that the number of the light emitting elements 2 is not limited to one and may be plural. The color of the light emitted by the light emitting element 2 is not limited to the white light described above, but may be appropriately changed depending on the application of the vehicle light source module 1 such as orange light or red light. Further, among the above-described red light, orange light, and white light, at least two or more light emitting elements 2 having different colors may be mounted on the first substrate 3.

The first substrate 3 is a rectangular flat plate-shaped printed wiring board (PWB), and one surface (front surface) of the insulating substrate is provided with wiring (not shown) electrically connected to the light emitting element 2. It consists of a wiring board. The first substrate 3 is provided with a plurality of (two in the present embodiment) first holes 10a and 10b penetrating the first substrate 3. The first hole portions 10a, 10b are portions into which lead terminals 19a, 19b of the connector portion 8 to be described later are inserted, and the first light emitting element 2 and the electric light emitting element 2 described above are provided around the first hole portions 10a, 10b. Lands (not shown) that form part of the wirings that are electrically connected are provided.

The second substrate 5 is a rectangular flat plate-shaped printed circuit board (PCB) larger than the first substrate 3, and mounting components (not shown) constituting the drive circuit 4 are mounted on the PWB described above. It has a structure. The second substrate 5 is a single-sided or double-sided wiring substrate in which at least one surface (front surface) or both surfaces (front surface and back surface) of the insulating substrate are provided with wiring (not shown) electrically connected to the mounted components. ..

The second substrate 5 is provided with a plurality of (four in the present embodiment) second hole portions 11 a to 11 d penetrating the second substrate 5. The second hole portions 11a to 11d are portions into which lead terminals 19a to 19d of the connector portion 8 described later are inserted, and the drive circuit 4 described above is configured around the second hole portions 11a to 11d. The land (not shown) forming a part of the wiring electrically connected to the mounted component is provided.

The first housing 7 has a substantially circular flat plate-shaped front wall portion 7a, a substantially cylindrical peripheral wall portion 7b surrounding the front and rear sides of the front wall portion 7a, and a diameter from the rear surface side of the peripheral wall portion 7b. It has a substantially annular flat plate-shaped enlarged diameter portion 7c that protrudes in the radial direction, and a substantially cylindrical extension portion 7d that surrounds the rear side of the enlarged diameter portion 7c. Further, on the back surface of the expanded diameter portion 7c, a fitting protrusion 12 having a substantially rectangular tubular shape with rounded four corners is provided so as to project.

The heat radiating portion 6 efficiently radiates the heat generated by the light emitting element 2 to the outside. Therefore, at least a part or all of the first housing 7 has a high thermal conductivity such as a metal material, a resin material, or a composite material thereof. It is configured by using. That is, the heat dissipation portion 6 may have a structure in which a heat dissipation member (heat sink) is attached to the first housing 7, or a structure in which the first housing 7 itself serves as a heat dissipation member (heat sink).

Further, the first housing 7 is provided with a plurality of slits 13 (three in the present embodiment) that cut out a part of the extension portion 7d in order to increase the heat radiation area of the heat radiation portion 6. Each slit 13 is formed so as to cut out the extension portion 7d from the rear end side of the extension portion 7d with a constant width in the front-rear direction. The plurality of slits 13 are arranged substantially evenly in the circumferential direction of the extension 7d.

The first housing 7 is provided with a plurality of (two in the present embodiment) third holes 14a and 14b penetrating the front wall 7a. The third holes 14a, 14b have a diameter larger than that of the first holes 10a, 10b in order to penetrate the lead terminals 19a, 19b of the connector section 8 described later in a non-contact state. The third holes 14a and 14b do not necessarily have to be provided according to the number of the lead terminals 19a and 19b, and one hole (opening) for penetrating the plurality of lead terminals 19a and 19b in a non-contact state (opening). It is also possible to form it as a part.

The second housing 9 has a substantially rectangular flat plate-shaped rear wall portion 9a having four rounded corners, and a substantially rectangular tubular socket portion 9b located on the back side of the rear wall portion 9a and having four rounded corners. I have. A fitting recess 15 having a substantially rectangular frame shape with rounded four corners is provided on the front surface of the rear wall 9a. The fitting concave portion 15 is provided between the outer peripheral wall 15a protruding forward from the outer peripheral portion of the rear wall 9a and the inner peripheral wall 15b protruding forward from the inner side of the outer peripheral wall 15a. ..

The second housing 9 also has a pedestal portion 16 that projects from the front surface of the rear wall portion 9a. The pedestal 16 is located at the center of the rear wall 9a and forms a circular step surface in plan view which is one step higher than the front surface of the rear wall 9a. In addition, a columnar protrusion 17 is provided at the center of the pedestal 16 so as to project. On the other hand, in the central portion of the second substrate 5, there is provided a fourth hole portion 18 which allows the protrusion 17 to penetrate therethrough.

The connector part 8 has a plurality of (four in the present embodiment) lead terminals 19a to 19d inside the socket part 9b. The lead terminals 19a to 19d are integrally attached to the second housing 9 in a state of penetrating the rear wall portion 9a in the front-rear direction. The lead terminals 19a to 19d include two lead terminals 19a and 19b that are relatively long on the front surface side of the rear wall portion 9a and two lead terminals that are relatively short on the front surface side of the rear wall portion 9a. It is composed of 19c and 19d.

In the light source module 1 for a vehicular lamp having the above-described configuration, the second substrate 5 heat crimps the tip of the protrusion 17 in the state where the protrusion 17 penetrates the fourth hole 18. As a result, it is attached on the stepped surface of the pedestal portion 16. In addition, the second substrate 5 has a land around each of the second hole portions 11a to 11d with the four lead terminals 19a to 19d penetrating the four second hole portions 11a to 11d, respectively. , Are electrically connected to the lead terminals 19a to 19d by fixing the lead terminals 19a to 19d with solder.

As a result, in the light source module 1 for a vehicle lamp, the second substrate 5 is attached to the front surface side of the second housing 9. From this state, the fitting recessed portion 15 provided on the front side of the second housing 9 is fitted with the fitting protruding portion 12 provided on the back side of the first housing 7. The fitting convex portion 12 fitted in the fitting concave portion 15 is fixed over the entire circumference by the adhesive S injected into the fitting concave portion 15.

As a result, in the vehicle lamp light source module 1, the back side of the first casing 7 and the front side of the second casing 9 are integrally attached. Further, in this state, the second substrate 5 is arranged so as to be opposed to the back surface of the front wall portion 7a with a space therebetween in a state of not being in contact with the peripheral wall portion 7b of the first housing 7. The third hole portions 14a and 14b penetrate the two long lead terminals 19a and 19b in a non-contact state.

From this state, the first substrate 3 is attached to the front surface of the front wall portion 7a using an adhesive (not shown) having high thermal conductivity. When the front wall portion 7a is made of a conductive material such as metal, the first substrate 3 is attached while being electrically insulated from the first housing 7.

In addition, the first substrate 3 has the land around each of the first hole portions 10a and 10b with the two long lead terminals 19a and 19b penetrating the two first hole portions 10a and 10b, respectively. And the lead terminals 19a and 19b are fixed to each other by soldering so that they are electrically connected to the lead terminals 19a and 19b.

As a result, the long two lead terminals 19c and 19d of the plurality of lead terminals 19a to 19d are connected to the light emitting element 2 and the drive circuit 4 among the wirings provided on the first substrate 3 and the second substrate 5. It is electrically connected to a power supply line and a ground line for supplying power. On the other hand, the two short lead terminals 19c and 19d are electrically connected to a control line for transmitting a control signal to the drive circuit 4 among the wirings provided on the second substrate 5.

The light source module 1 for a vehicular lamp configured as described above is the vehicular lamp via the ring-shaped seal member (O-ring) 20 attached to the outer circumference of the expanded diameter portion 7c as the socket with the coupler described above. It is possible to detachably accommodate the inside of the lamp body (not shown) through a hole provided on the back side of the lamp body.

As described above, in the vehicle lamp light source module 1 of this embodiment, the first substrate 3 provided with the light emitting element 2 is attached to the first housing 7, and the second circuit provided with the drive circuit 4 is provided. The substrate 5 is attached to the second casing 9 in a state where it is not in contact with the first casing 7.

As a result, in the light source module 1 for a vehicular lamp according to the present embodiment, the first light emitting element 2 is provided as compared with the case where the light emitting element 2 and the drive circuit 4 are mounted on the same surface of the same substrate as in the related art. It is possible to make the substrate 3 of 1. Further, the heat radiating portion 6 provided in the first housing 7 can efficiently radiate the heat generated by the light emitting element 2 to the outside.

On the other hand, the second substrate 5 provided with the drive circuit 4 is arranged apart from the first substrate 3. As a result, in the vehicle lamp light source module 1 of the present embodiment, the light emitting element 2 can be stably driven by the drive circuit 4 without being affected by the heat generated by the light emitting element 2.

Further, the second substrate 5 is attached to the pedestal portion 16 with a space from the front surface of the rear wall portion 9a. As a result, in the light source module 1 for a vehicular lamp according to the present embodiment, it is possible to dispose the mounting components forming the drive circuit 4 not only on the front surface side of the second substrate 5 but also on the back surface side thereof. As a result, it is possible to make the second substrate 5 smaller than in the case where the mounted components forming the drive circuit 4 are arranged only on the front surface side of the second substrate 5.

As described above, the light source module 1 for a vehicular lamp according to the present embodiment has a structure excellent in cooling performance and can be further downsized.

The present invention is not necessarily limited to the above-mentioned embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the first substrate 3 is not necessarily limited to the configuration in which only the light emitting element 2 described above is mounted, and in addition to the light emitting element 2, a part of mounting components forming the drive circuit 4 may be provided. The configuration may be implemented. It is also possible to mount electronic components other than the mounting components that form the light emitting element 2 and the drive circuit 4 on the first substrate 3 and the second substrate 5 as described above.

Further, the second substrate 5 is not limited to the configuration in which the central portion is fixed to the pedestal portion 16 described above, but is fixed on the stepped surfaces of the plurality of pedestal portions provided in the peripheral portion of the second substrate 5. It may be configured to be. Further, the method of fixing the second substrate 5 to the pedestal portion 16 is not limited to the above-described thermal crimping, but it is also possible to fix it by, for example, screwing.

Further, the first casing 7 and the second casing 9 are integrally attached by fitting the fitting protrusion 12 and the fitting recess 15 described above. The configuration is not limited, and it is also possible to attach them integrally by screwing or the like. However, it is desirable to have a structure that can prevent the transfer of heat from the first housing 7 to the second housing 9.

Further, the light emitting element 2 is not necessarily limited to the above-mentioned chip LED (SMD LED), and may be any LED element mountable on the first substrate 3. As for the type of the light emitting element 2, a semiconductor light emitting element such as a laser diode (LD) or an organic EL (OLED) can be used in addition to the above-described LED.

Further, the present invention is not limited to the application of the present invention to the light source module 1 for a vehicle lamp that constitutes the above-mentioned DICS, and may be, for example, a vehicle headlight (headlamp), a tail lamp (taillight), or a side lamp. (Position lamp), auxiliary headlight (sub headlamp), front (rear) fog lamp (fog lamp), daytime lighting (daytime running) lamp, lid lamp, brake lamp (stop lamp), back lamp, The present invention can be widely applied to a light source module for a vehicular lamp used for a vehicular lamp such as a turn indicator (a winker lamp/a turn lamp).

For example, in the present invention, the DICS mounted with the light emitting elements 2 that emit white light and orange light, respectively, is used as a light source and is combined with a light guide such as a light guide rod or a light guide plate to obtain a DRL (Daytime Running Lamps). ) And a turn lamp, or a vehicle lamp having two functions of a position lamp and a turn lamp.

On the other hand, in the present invention, the DICS in which the light emitting elements 2 for emitting red light and orange light are respectively mounted is used as a light source and combined with a light guide body such as a light guide rod or a light guide plate to provide a tail lamp and a turn lamp. It is possible to configure a vehicular lamp having two functions.

On the other hand, in the present invention, the DICS in which the light emitting elements 2 for emitting red light, orange light, and white light are respectively mounted is used as a light source and combined with a light guide such as a light guide rod or a light guide plate to provide a tail lamp. It is possible to configure a vehicular lamp having three functions of a turn lamp and a back lamp.

DESCRIPTION OF SYMBOLS 1... Light source module for vehicle lamps 2... Light emitting element 3... 1st board 4... Drive circuit 5... 2nd board 6... Heat dissipation part 7... 1st housing 7a... Front wall part 7b... Peripheral wall part 7c... Expanded portion 7d... Extension portion 8... Connector portion 9... Second housing 9a... Rear wall portion 9b... Socket portions 10a, 10b... First hole portions 11a to 11d... Second hole portion 12... Fitting convex Part 13... Slits 14a, 14b... Third hole 15... Fitting recess 15a... Outer peripheral wall 15b... Inner peripheral wall 16... Pedestal 17... Projection 18... Fourth hole 19a to 19d... Lead terminal 20... Seal Member S... Adhesive

Claims (9)

A first substrate provided with a light emitting element,
A second substrate provided with a drive circuit for driving the light emitting element;
A first housing provided with a heat dissipation portion for dissipating heat generated by the light emitting element;
A second housing provided with a connector portion electrically connected to the first substrate and the second substrate,
The first substrate is attached to the first housing,
The said 2nd board|substrate is attached to the said 2nd housing|casing in the state which is not in contact with the said 1st housing|casing, The light source module for vehicle lamps characterized by the above-mentioned. The first housing has a front wall portion and a peripheral wall portion that surrounds the periphery of the front wall portion on the back side.
The second housing has a rear wall portion that faces the back surface of the front wall portion with a space in between, and is attached to the back surface side of the first housing,
The first substrate is attached to the front side of the front wall portion,
The said 2nd board|substrate is attached to the front surface side of the said rear wall part in the state which is not contacting with the said surrounding wall part, The light source module for vehicle lamps of Claim 1 characterized by the above-mentioned. The connector portion has a lead terminal attached in a state of penetrating the rear wall portion in the front-rear direction,
The lead terminal is inserted into a first hole portion provided in the first substrate and a second hole portion provided in the second substrate, respectively. Electrically connected to the second substrate,
The light source module for a vehicular lamp according to claim 2, wherein the front wall portion is provided with a third hole portion that penetrates the lead terminal in a non-contact state. The second housing has a pedestal portion protruding from the front surface of the rear wall portion,
The light source module for a vehicular lamp according to claim 2, wherein the second substrate is attached to the pedestal part with a space from the front surface of the rear wall part. The light source module for a vehicular lamp according to claim 4, wherein the second substrate has a fourth hole that allows a protrusion provided on the pedestal to pass therethrough. The light source module for a vehicular lamp according to any one of claims 1 to 5, wherein the heat dissipation part is configured by at least a part or all of the first housing. 7. The light source module for a vehicle lamp according to claim 1, wherein the light emitting element emits any one of red light, orange light, and white light. Among the light emitting elements that emit any one of the red light, the orange light, and the white light, at least two or more light emitting elements having different colors are mounted on the first substrate. 7. The light source module for a vehicle lamp according to item 7. A vehicle lamp comprising the light source module for a vehicle lamp according to any one of claims 1 to 8.

Images