JP7044023B2 - Light emitting device - Google Patents

Description

The present invention relates to a light emitting device.

Conventionally, a grill lamp using a rod-shaped light guide body attached to a crosspiece of a grill of a vehicle is known (see, for example, Patent Document 1). The grill lamp described in Patent Document 1 is attached to the grill rail using a fastening means such as a band or a clip. Further, in order to prevent these engagement means from being directly viewed and spoiling the aesthetic appearance, a dummy mall is provided to hide the engagement means behind.

Japanese Unexamined Patent Publication No. 2001-105966

However, in the grill lamp described in Patent Document 1, since it is necessary to use members such as dummy moldings in order to hide the engaging means such as bands and clips, the time and member cost for attaching those members are required. There is a problem that it is wasted.

One of the objects of the present invention is a light emitting device using a rod-shaped light guide that can be attached to a member having a small width, and a separate member is required to maintain the aesthetic appearance in the attached state. The purpose is to provide a light emitting device that does not.

One aspect of the present invention provides the following light emitting devices [1] to [6] in order to achieve the above object.

[1] A light emitting element and a rod-shaped light guide body that propagates the light emitted from the light emitting element to the inside and emits the light from a linear light extraction surface provided along the length direction thereof. , Which is integrally molded with the light guide, covers the surface of the light guide on the opposite side of the light extraction surface, is made of a material that reflects the light, and has a mounting portion for mounting to an external member. A light emitting device having a material and.
[2] The above-mentioned [1], wherein the reflective material has a structure in which the mounting portion is provided on the opposite side of the light guide body and is mounted on a member located on the opposite side of the light guide body. Light emitting device.
[3] The light emission according to the above [1] or [2], wherein the maximum width of the portion provided with the light extraction surface matches the maximum width of the portion provided with the light extraction surface of the light guide body. Device.
[4] The light emitting device according to the above [1] or [2], wherein the surface between the light extraction surface of the light guide and the surface covered with the reflective material is covered with a reflective film.
[5] The light emitting device according to the above [4], wherein the outer edge of the light extraction surface is covered with the reflective film for adjusting the light emitting area.
[6] The plurality of the light guide bodies are integrally molded so as to form a predetermined pattern, and the reflective material is formed on the surface of the plurality of the light guide bodies on the opposite side of the light extraction surface. The light emitting device according to any one of the above [1] to [5], which covers the light emitting device.

According to the present invention, it is a light emitting device using a rod-shaped light guide that can be attached to a member having a small width, and does not require a separate member to maintain the aesthetic appearance in the attached state. Can be provided.

FIG. 1A is a side view seen from a direction perpendicular to the length direction of the light emitting device according to the first embodiment of the present invention. FIG. 1B is a vertical cross-sectional view of a light emitting device cut along the length direction. FIG. 2 is a vertical cross-sectional view of a light emitting device cut along a plane including a mounting portion along the width direction. 3 (a) and 3 (b) are perspective views showing the state before and after the light emitting device is attached to the member to be attached, respectively. FIG. 4 is a vertical cross-sectional view of a light emitting device having a mounting portion according to a modified example. 5 (a) and 5 (b) are perspective views showing states before and after mounting the light emitting device having the mounting portion according to the modified example to the member to be mounted. FIG. 6 is a vertical cross-sectional view of a light emitting device having a mounting portion according to another modification. 7 (a) and 7 (b) are perspective views showing a state before and after mounting a light emitting device having a mounting portion according to another modification to a member to be mounted. FIG. 8 is a schematic view of a front grill of a vehicle, which is an example of a member (design member) to be attached to a light emitting device. FIG. 9A is a vertical cross-sectional view of a light emitting device according to a second embodiment of the present invention, in which the side surface of the light guide body is covered with a reflective film. FIG. 10 is a vertical sectional view of a light emitting device according to a third embodiment of the present invention. FIG. 11 is a front view of the front grille in which the light emitting device is attached to the linear portions at both ends. FIG. 12A is a top view of the light emitting device according to the fourth embodiment of the present invention. FIG. 12B is a front view of the front grill to which the light emitting device is attached. FIG. 12 (c) is a front view of the front grill with the light emitting device attached.

[First Embodiment]
(Configuration of light emitting device)
FIG. 1A is a side view of the light emitting device 1 according to the first embodiment of the present invention as viewed from a direction perpendicular to the length direction. FIG. 1B is a vertical cross-sectional view of the light emitting device 1 cut along the length direction.

The light emitting device 1 is a linear light source capable of emitting linear light. Further, since the light emitting device 1 itself has a small width, it can be attached to a member having a small width.

The light emitting device 1 is a reflective material 11 composed of a light emitting element 12, a rod-shaped light guide body 10 that propagates and emits light emitted from the light emitting element 12, and a material that reflects light emitted from the light emitting element 12. Has.

The light guide body 10 has a linear light extraction surface (upper surface) 10a provided along the length direction thereof. The reflective material 11 covers the bottom surface 10b on the opposite side of the light extraction surface 10a of the light guide body 10, and reflects the light propagating inside the light guide body 10 toward the light extraction surface 10a.

The light emitted from the light emitting element 12 is taken into the light guide body 10 from the light intake surface 10c, propagates inside the light guide body 10 along the length direction thereof, and is emitted from the light extraction surface 10a. .. The light capture surface 10c is typically provided at one end of the light guide body 10 in the length direction, as shown in FIG. 1 (b).

The light guide body 10 and the reflective material 11 are integrally molded by two-color molding or insert molding. Therefore, it is possible to prevent moisture and dust from entering the interface between the light guide body 10 and the reflective material 11.

The light guide body 10 is made of a material transparent to light emitted from the light emitting element 12, such as polycarbonate (PC) or polymethylmethacrylate (PMMA). The light guide body 10 may be colorless and transparent, may be colored and transparent, and may contain a diffusing material such as acrylic beads or glass beads.

As shown in FIG. 1B, the light guide body 10 preferably has a plurality of steps 10d on the bottom surface 10b on the opposite side of the light extraction surface 10a. The plurality of steps 10d are provided along the length direction of the light guide body 10. By providing the step 10d, the light propagating inside the light guide body 10 can be efficiently reflected toward the light extraction surface 10a.

The rod-shaped "bar" having the shape of the light guide body 10 includes not only a straight rod but also a polygonal linear rod and a curved rod, and the light guide body 10 is a target to be attached to the light emitting device 1. It can take a shape according to the shape of the member.

The reflective material 11 is made of acrylonitrile, butadiene, styrene (ABS) or the like. Further, the reflective material 11 is preferably a white member containing a white dye such as titanium oxide in order to efficiently reflect the light propagating inside the light guide body 10. If it is desired to avoid seeing white when the light emitting device 1 is not lit, the reflective material 11 may be a black member containing a black dye such as carbon black.

The reflective material 11 has a mounting portion 11a for mounting on an external member. As shown in FIG. 1, a plurality of mounting portions 11a are provided along the length direction of the light emitting device 1 (the length direction of the reflector 11).

In the reflective material 11, the attachment portion 11a is provided on the opposite side of the light guide body 10, and has a structure such that it can be attached to a member located on the opposite side of the light guide body 10. The mounting portion 11a is a rod-shaped member having a protrusion at the tip for fixing to the member to be mounted by snap-fitting.

FIG. 2 is a vertical cross-sectional view of the light emitting device 1 cut at a surface including the mounting portion 11a along the width direction. Here, the width direction is the left-right direction in FIG. 2, and is a direction orthogonal to the length direction.

3 (a) and 3 (b) are perspective views showing the state before and after the light emitting device 1 is attached to the member 50 to be attached, respectively. FIGS. 3A and 3B show a part of the portion of the light emitting device 1 provided with the light extraction surface 10a. Further, in FIGS. 3A and 3B, the reflector 11 side of the light emitting device 1 is on the upper side in order to show the state of the mounting portion.

As shown in FIGS. 3A and 3B, the member 50 to be attached is provided with the attached portion 51 at a position corresponding to the attached portion 11a, and the attached portion 11a is attached to the attached portion 51. By snap-fitting, the light emitting device 1 can be attached to the member 50.

In order to securely fix the light emitting device 1 by the member 50, the mounting portions 11a are provided alternately at one end and the other end in the width direction of the reflector 11 with the protrusions facing inward.

The attached portion 51 is provided with protrusions in the width direction that sandwich the attached portion 11a from both sides in order to prevent the position shift of the light emitting device 1.

Further, as shown in FIG. 2, the maximum width W of the portion of the light emitting device 1 provided with the light extraction surface 10a coincides with the maximum width of the portion of the light guide body 10 provided with the light extraction surface 10a. Therefore, the width of the light emitting device 1 is small, and the light emitting device 1 can be attached to a member having a small width. Further, since the members other than the light guide body 10 cannot be seen on the outside of the light emitting surface when viewed from the light extraction surface 10a side, it is not necessary to separately use a member for hiding the member that impairs the aesthetic appearance.

Here, the width of the light emitting device 1 and the members included in the light emitting device 1 is the length in the left-right direction of FIG. 2, that is, the light emitting device 1 is viewed from the light extraction surface 10a side (upper side in FIG. 2). When, it is the length in the direction orthogonal to the length direction.

The mounting portion of the reflective material is not limited to the mounting portion 11a. Hereinafter, a modified example of the mounting portion will be described.

FIG. 4 is a vertical cross-sectional view of a light emitting device 1 having a mounting portion 21a, which is a modification of the mounting portion 11a. The cutting position of the cross section of the light emitting device 1 shown in FIG. 4 corresponds to the cutting position of the cross section of the light emitting device 1 shown in FIG. 5 (a) and 5 (b) are perspective views showing states before and after mounting the light emitting device 1 having the mounting portion 21a on the member 50 to be mounted.

Similar to the mounting portion 11a, a plurality of mounting portions 21a are provided along the length direction of the light emitting device 1 (the length direction of the reflective material 21).

In the reflective material 21, the mounting portion 21a is provided on the opposite side of the light guide body 10 and has a structure such that it can be mounted on a member located on the opposite side of the light guide body 10. The mounting portion 21a is a rod-shaped member having a protrusion at the tip for fixing to the member 50 to be mounted by snap-fitting.

As shown in FIGS. 5A and 5B, the member 50 to be attached is provided with the attached portion 52 at a position corresponding to the attached portion 21a, and the attached portion 21a is attached to the attached portion 52. By snap-fitting, the light emitting device 1 can be attached to the member 50.

The mounting portion 21a is provided with a protrusion facing outward near the center of the reflective material 11 in the width direction, and snap-fits to the inside of the annular mounted portion 52.

In order to securely fix the light emitting device 1 by the member 50, the mounting portions 11a are provided with protrusions that face one direction in the width direction of the reflector 11 and those that face the other direction alternately.

Further, as shown in FIG. 4, even in the form of using the mounting portion 21a, the light extraction surface 10a of the light guide body 10 is provided with the maximum width W of the portion where the light extraction surface 10a of the light emitting device 1 is provided. It matches the maximum width of the part. Therefore, the width of the light emitting device 1 is small, and the light emitting device 1 can be attached to a member having a small width. Further, when viewed from the light extraction surface 10a side, the members other than the light guide body 10 cannot be seen on the outside of the light emitting surface, so that it is not necessary to separately use a member for hiding the member that impairs the aesthetic appearance.

FIG. 6 is a vertical cross-sectional view of a light emitting device 1 having a mounting portion 31a, which is a modification of the mounting portion 11a. The cutting position of the cross section of the light emitting device 1 shown in FIG. 6 corresponds to the cutting position of the cross section of the light emitting device 1 shown in FIG. 7 (a) and 7 (b) are perspective views showing a state before and after attaching the light emitting device 1 having the attachment portion 31a to the member 50 to be attached.

Similar to the mounting portion 11a, a plurality of mounting portions 31a are provided along the length direction of the light emitting device 1 (the length direction of the reflective material 31).

In the reflective material 31, the mounting portion 31a is provided on the opposite side of the light guide body 10, and has a structure such that it can be mounted on a member located on the opposite side of the light guide body 10. The mounting portion 31a is a rod-shaped member having a screw hole for fixing to the member 50 to be mounted by screwing.

As shown in FIGS. 7A and 7B, the member 50 to be mounted is provided with a mounted portion 53 at a position corresponding to the mounting portion 31a, and the mounting portion 31a and the mounted portion 52 are provided. The light emitting device 1 can be attached to the member 50 by screwing with the screw 60.

The attached portion 53 is a portion provided with a hole for passing the screw 60 of the plate-shaped member 50. Align the holes of the mounted portion 53 with the screw holes of the mounting portion 31a, and fix them with screws 60 from the mounted portion 53 side.

Further, as shown in FIG. 6, even in the form of using the mounting portion 31a, the light extraction surface 10a of the light guide body 10 is provided with the maximum width W of the portion where the light extraction surface 10a of the light emitting device 1 is provided. It matches the maximum width of the part. Therefore, the width of the light emitting device 1 is small, and the light emitting device 1 can be attached to a member having a small width. Further, when viewed from the light extraction surface 10a side, the members other than the light guide body 10 cannot be seen on the outside of the light emitting surface, so that it is not necessary to separately use a member for hiding the member that impairs the aesthetic appearance.

The structure of the mounting portion of the light emitting device 1 is not limited to that of the mounting portions 11a, 21a, 31a described above.

As the light emitting element 12, an LED is typically used. The LED is a small light emitting element, has low power consumption and heat generation, and has a long life, so that it is suitable for use as a light emitting element 12. The light emitting element 12 may be installed at both ends of the light guide body 10 in the length direction. In that case, light intake surfaces 10c are provided at both ends of the light guide body 10 in the length direction.

The light emitting element 12 is mounted on the substrate 13. The substrate 13 is a wiring board having wiring connected to the electrodes of the light emitting element 12. Further, the substrate 13 is fixed on the support member 14.

The installation space of the light emitting element 12 surrounded by the light guide body 10, the reflector 11, and the support member 14 is sealed by the light guide body 10, the reflector 11, and the support member 14 for waterproofing. preferable.

FIG. 8 is a schematic view of the front grill 70 of the vehicle, which is an example of a member (design member) to be attached to the light emitting device 1.

The front grill 70 has a frame 71 and a mesh 72 installed in the frame. The opening 73 of the mesh 72 functions as an intake port for taking air into the engine or radiator of the vehicle.

In the example shown in FIG. 8, the mesh 72 is composed of a linear portion 72a extending in the vertical direction and a linear portion 72b extending in the horizontal direction, and the linear portions 72a at both ends serve as a member 50 to be attached to the light emitting device 1. It is formed.

The linear portions 72a at both ends of the member 50 have attachment portions such as attachment portions 51, 52, and 53, and by attaching attachment portions such as attachment portions 11a, 21a, and 31a of the light emitting device 1 to the attachment portions. , The linear light emitting device 1 is fixed to the front side of the linear portions 72a at both ends. As a result, the linear portions 72a at both ends of the mesh 72 can be made to emit light linearly.

When the light emitting device 1 is installed on the front grill 70, since the width of the light emitting device 1 is small, a part of the member does not protrude from the linear portion 72a and the appearance is not deteriorated. Further, since the opening area of the mesh 72 is not narrowed, the intake function of the front grill 70 is not deteriorated.

The attachment target of the light emitting device 1 is not limited to the front grill, and can be attached to a linear member such as a bumper or a plating molding.

[Second Embodiment]
The second embodiment of the present invention differs from the first embodiment in that the side surface of the light guide body is covered with a reflective film. The same members as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified.

In the light emitting device 1, the width is made as small as possible, and the side surface 10e of the light guide body 10 is the reflective film 11 so that the reflective film 11 cannot be seen on the outside of the light emitting surface when viewed from the light extraction surface 10a side. Not covered by. Here, the side surface 10e is a surface between the light extraction surface 10a and the bottom surface 10b.

FIG. 9A shows a vertical surface of the light emitting device 1 in which the side surface 10e of the light guide body 10, that is, the surface between the light extraction surface 10a and the bottom surface 10b covered with the reflective material 11 is covered with the reflective film 15. It is a sectional view.

The reflective film 15 is made of a material that reflects light emitted from a light emitting element 12 such as chromium (Cr), and is formed by plating or the like. Further, by providing the reflective film 15, it is possible to prevent dirt and water droplets from adhering to the side surface 10e. The thickness of the reflective film 15 is, for example, about 1 to 30 μm, and has almost no effect on the width of the light emitting device 1.

Further, as shown in FIG. 9, the maximum width W1 of the portion of the light emitting device 1 provided with the light extraction surface 10a is the thickness of the reflection film 15 of the portion of the light guide body 10 provided with the light extraction surface 10a. Matches the maximum width including.

FIG. 9B is a vertical cross-sectional view of the light emitting device 1 covered with the reflective film 15 up to the outer edge of the light extraction surface 10a. The size of the light emitting area can be adjusted by the size of the region covered by the reflective film 15 of the light extraction surface 10a.

[Third Embodiment]
The third embodiment of the present invention is different from the first embodiment in the mounting structure of the light emitting device. The same members as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified.

FIG. 10 is a vertical sectional view of the light emitting device 2 according to the third embodiment of the present invention. The light emitting device 2 shown in FIG. 10 is cut at a surface including a mounting portion 41a along the width direction.

The light emitting device 2 is used by fitting the light guide body 10 into a member 50 to be attached, for example, a linear hole 54 provided along the center line in the length direction of the linear portion 72a of the front grill 70. ..

The light emitting device 2 is fitted from the back side of the member 50, aligns the positions of the screw holes of the mounting portion 41a with the holes of the member 50, and is screwed from the member 50 side with screws 60.

FIG. 11 is a front view of the front grill 70 in which the light emitting device 2 is attached to the linear portions 72a at both ends. In this case, the light emitting device 2 emits light on the center line of the linear portions 72a at both ends.

When the light emitting device 2 is attached to the member 50, the reflective material 41 is located on the back side of the light guide body 10 and the member 50, and therefore cannot be seen from the light extraction surface 10a side. Further, the head of the screw 60 may be visible from the light extraction surface 10a side, but since the size is small, the influence on the aesthetic appearance is small. Therefore, it is not necessary to separately use a member for hiding a member that spoils the aesthetic appearance.

[Fourth Embodiment]
The fourth embodiment of the present invention is different from the first embodiment in the shape of the light emitting device. The same members as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified.

FIG. 12A is a top view of the light emitting device 3 according to the fourth embodiment of the present invention. The light guide body 100 of the light emitting device 3 has a shape in which a plurality of rod-shaped light guide bodies are integrally combined so as to form a predetermined pattern. In the example shown in FIG. 12 (a), the light guide 100 has a grid pattern that matches the grid pattern of 72 of the mesh of the front grill 70.

The reflector of the light emitting device 3 is the light extraction surface of the light guide body 100 (FIG. 12 (a)), similarly to the reflector 11 covering the bottom surface 10b on the opposite side of the light extraction surface 10a of the light guide body 10 in the light emitting device 1. Covers the bottom surface (the surface on the back side of FIG. 12A) on the opposite side of the front side surface of the above.

In addition, the reflective material of the light emitting device 3 has the same characteristics as the reflective material 11 of the light emitting device 1. The reflector mounting portion of the light emitting device 3 has, for example, the same structure as the mounting portions 11a, 21a, or 31a, and is provided along the outer frame of the lattice pattern of the light emitting device 3. The area where the light emitting element 12 of the light emitting device 3 is installed is usually provided outside the grid pattern.

FIG. 12B is a front view of the front grill 70 to which the light emitting device 3 is attached. The portion of the mesh 72 corresponding to the mounting position of the outer frame of the light emitting device 3 is formed as the member 50 to be mounted. The portion of the mesh 72 that functions as a member 50 has attachment portions such as attachment portions 51, 52, and 53, and by attaching attachment portions such as attachment portions 11a, 21a, and 31a of the light emitting device 3 to the attachment portions. , The light emitting device 3 is fixed to the mesh 72.

FIG. 12C is a front view of the front grill 70 with the light emitting device 3 attached. The grid pattern of the light emitting device 3 and the grid pattern of the mesh 72 form one continuous grid pattern. As a result, a part of the region of the mesh 72 can be made to emit light in a grid pattern. Further, the opening of the grid pattern of the light emitting device 3 functions as an intake port of the front grill 70.

The area where the light emitting element 12 of the light emitting device 3 is installed can be hidden behind the frame 71 of the front grill 70, for example.

The pattern shape of the light emitting device 3 and the mesh 72, the mounting position of the light emitting device 3 on the mesh 72, and the like are not particularly limited. Further, the member to be attached to the light emitting device 3 is not limited to the front grill 70.

(Effect of embodiment)
According to the first to fourth embodiments, it is a light emitting device using a rod-shaped light guide that can be attached to a member having a small width, and is a separate member for maintaining the aesthetic appearance in the attached state. It is possible to provide a light emitting device that does not require.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be carried out within a range that does not deviate from the gist of the invention. Further, the above-described embodiment does not limit the invention according to the claims. It should also be noted that not all combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

1, 2, 3 Light emitting device 10, 100 Light guide 10a Light extraction surface 10b Bottom surface 10e Side surface 11, 21, 31, 41 Reflective material 11a, 21a, 31a, 41a Mounting part 15 Reflective film

Claims (4)

Light emitting element and
A rod-shaped light guide body that propagates the light emitted from the light emitting element to the inside and emits the light from a linear light extraction surface provided along the length direction thereof.
A reflective material that is integrally molded with the light guide, covers the surface of the light guide on the opposite side of the light extraction surface, is made of a material that reflects the light, and has a mounting portion for mounting to an external member. When,
Have,
A light emitting device having a structure in which the mounting portion of the reflective material is provided on the opposite side of the light guide body and is mounted on a member located on the opposite side of the light guide body . Light emitting element and
A rod-shaped light guide body that propagates the light emitted from the light emitting element to the inside and emits the light from a linear light extraction surface provided along the length direction thereof.
A reflective material that is integrally molded with the light guide, covers the surface of the light guide on the opposite side of the light extraction surface, is made of a material that reflects the light, and has a mounting portion for mounting to an external member. When,
Have,
A light emitting device in which the maximum width of the portion provided with the light extraction surface matches the maximum width of the portion provided with the light extraction surface of the light guide body. Light emitting element and
A rod-shaped light guide body that propagates the light emitted from the light emitting element to the inside and emits the light from a linear light extraction surface provided along the length direction thereof.
A reflective material that is integrally molded with the light guide, covers the surface of the light guide on the opposite side of the light extraction surface, is made of a material that reflects the light, and has a mounting portion for mounting to an external member. When,
Have,
A light emitting device in which a surface between the light extraction surface of the light guide and the surface covered with the reflective material is covered with a reflective film. Light emitting element and
A rod-shaped light guide body that propagates the light emitted from the light emitting element to the inside and emits the light from a linear light extraction surface provided along the length direction thereof.
A reflective material that is integrally molded with the light guide, covers the surface of the light guide on the opposite side of the light extraction surface, is made of a material that reflects the light, and has a mounting portion for mounting to an external member. When,
Have,
A plurality of the light guide bodies are integrally molded and combined in a plane shape so as to form a predetermined pattern.
A light emitting device in which the reflective material covers a surface of a plurality of the light guide bodies on the opposite side of the light extraction surface.

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