JP5994759B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device.

  In Patent Document 1, a case is disposed on the back side of a transparent display plate, a light guide plate is disposed between the display plate and the case, and the peripheral wall portion of the display plate and the surface peripheral portion of the case are welded. There is disclosed an illuminating device that is bonded and fixed by adhesion, and radiates light emitted from the surface of the light guide plate to the outside through the display plate.

Japanese Utility Model Publication No. 3-84890

2. Description of the Related Art Conventionally, a technique for forming an illumination by attaching an illumination device to an automobile ornament (an ornament with illumination) is known, and the illumination device of Patent Document 1 is an example.
In this ornament with illumination, it is conceivable to further improve the design by attaching a decorative member having light shielding properties to the surface.

In the illumination device of Patent Document 1, when a decorative member having a light shielding property is attached to the surface side of the display plate and the decorative member covers a part of the display plate, the display plate and the case It is necessary to arrange the coupling portion so that the coupling portion (joining portion) bypasses the decorative member.
Therefore, the area of the display panel exposed from the decorative member is reduced by the area of the coupling portion, and there is a problem that the design is impaired.

Moreover, in the illuminating device of patent document 1, since the connection part (joining part) of the said display board and the said case will be visible from the outside through the said transparent display board, the problem that the designability of an illuminating device is impaired. is there.
In particular, when welding is used for the joining portion, the appearance of the joining portion is poor, so that the design is greatly impaired.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide an illuminating device excellent in design.

  As a result of intensive studies in order to solve the above-mentioned problems, the present inventors have arrived at each aspect of the present invention as follows.

<First aspect>
The first aspect is
A light source that emits light;
A housing containing a light source;
A lens with a light source located on the back side;
A decorative member having a light shielding property covering a part of the surface of the lens;
An exposed portion exposed from the decorative member on the surface of the lens;
A lighting device including first to third joint portions, which are portions where an outer peripheral edge portion of a lens and a housing are joined,
The outer peripheral edge of the lighting device is formed by the outer peripheral edge of the lens and the outer peripheral edge of the decorative member,
The first joint is disposed on the back side of the outer peripheral edge of the exposed portion,
The second joint is disposed on the back side of the outer peripheral edge of the decorative member,
A 3rd junction part is a part which connects a 1st junction part and a 2nd junction part, and is an illuminating device arrange | positioned at the back surface side of a decoration member.

In the first aspect, the radiated light of the light source is radiated from the exposed portion of the lens to the outside of the lighting device, and the entire exposed portion emits light, whereby an excellent aesthetic lighting device can be realized.
Here, in the 1st situation, since the 3rd joined part is arranged on the back side of a decoration member (in other words, because the 3rd joined part is made to dig under the decoration member), the 3rd joined part Compared with the case where the portion is disposed on the back side of the exposed portion, the area of the exposed portion can be increased by the area of the third joint portion, and the design can be improved.

By the way, when the third joint portion is arranged on the back side of the exposed portion, light is not emitted from the portion located above the third joint portion in the exposed portion, and the portion becomes a non-light emitting portion. Due to the contrast with the exposed portion that emits light as a whole, the non-light emitting portion becomes very conspicuous, and the unity feeling of the lighting device is impaired.
On the other hand, in the 1st situation, since the 3rd joined part is arranged on the back side of a decoration member, it can prevent that a non-light-emitting part does not exist and a sense of unity of an illuminating device is spoiled. Therefore, the design can be further improved.

  In the first aspect, the third joint is disposed on the back side of the decorative member, and the third joint is covered with the decorative member, but the third joint is the first joint and the second joint. Since it is a part connecting the part, it is possible to reduce the area of the part covering the third joint part in the decorative member, and the area of the exposed part is increased by that much, thereby further improving the design. be able to.

<Second aspect>
According to a second aspect, in the first aspect, an outer peripheral edge portion of the exposed portion includes an inclined surface formed so that the lens becomes thinner toward the outer peripheral end surface, and the inclined surface covers the first joint portion. To do.
Here, the 1st junction part is arrange | positioned at the back surface side of the outer peripheral edge part of an exposed part, and when the 1st junction part is formed using welding, the appearance of a 1st junction part worsens. .
On the other hand, in the second aspect, an inclined surface is provided on the outer peripheral edge of the exposed portion, and the first joint is difficult to see through the lens from the outside of the lighting device due to reflection and refraction on the inclined surface. Therefore, the design property can be improved.

<Third aspect>
In a second aspect, the third aspect includes a plate-like light guide disposed between the lens and the light source, and the inclined surface covers the end of the light guide.
In the third aspect, the radiated light of the light source is incident on the light guide with the back surface of the light guide as the incident surface, and is diffused and guided in the entire surface direction inside the light guide. Is emitted as an exit surface.

Then, the light emitted from the light guide enters the lens with the back surface of the lens as the incident surface, and is emitted from the exposed portion of the lens.
Therefore, in the third aspect, the lens can be formed into a substantially plate shape having a large area, and thus the above-described operation and effect of the first aspect can be further enhanced.
In addition, since the inclined surface of the lens covers the end portion of the light guide, the gap between the end portion of the light guide and the housing is attached to the lens from the outside of the lighting device due to reflection and refraction on the inclined surface. Since it becomes difficult to see through, the design can be improved.

<Fourth aspect>
The fourth aspect is the first to third aspects,
A hook-like engagement convex portion formed on either the lens or the housing;
A groove-like engagement recess formed on the other side of the lens or the housing,
By engaging the engaging convex portion with the engaging concave portion, the lens and the housing are joined in a liquid-tight state.

  In the fourth aspect, since it is possible to prevent the liquid from entering the housing, the light source is not exposed to the liquid, and particularly when the lighting device is used outdoors (for example, as an exterior member of a vehicle). In case) can improve waterproofness.

FIG. 1A is a top view of a lighting device 10 according to an embodiment of the present invention. FIG. 1B is an end view of a cross section of the lighting device 10, and is an end view taken along the line X1-X1 in FIG. FIG. 1C is an end view of a cross section of the lighting device 10 and is an end view taken along the line X2-X2 in FIG. FIG. 2A is an end view of a longitudinal section of the lighting device 10, and is an end view as indicated by arrows Y1-Y1 in FIGS. 1A and 1C. FIG. 2B is an end view of a cross section of the lighting device 10, and is an end view as indicated by arrows Y2-Y2 in FIGS. 1A and 1C. The end view of the principal part longitudinal cross-section of the illuminating device 10. FIG.

  Hereinafter, a lighting device 10 according to an embodiment of the present invention will be described with reference to the drawings. In addition, in each drawing, in order to make the explanation easy to understand, the dimensional shape and the arrangement location of the constituent members of the lighting device 10 are schematically illustrated in an exaggerated manner. May not always match.

As shown in FIGS. 1 to 3, the lighting device 10 includes a decorative member 20 (notches 21 and 22, plated layer M), a decorative member 30 (notched portion 31 and plated layer M), and a lens 40 (mounting recess 41, 42, exposed parts 43 and 44, extending parts 45 to 47, engaging convex part 48, inclined surface 49), sheet material 50, light guide 60 (concave part 61, 62), housing 70 (accommodating concave part 71, connecting part) 72, engaging recess 73), light emitting members 81 and 82 (LED 83, wiring board 84), first joint P1, second joint P2, third joint P3, etc., and used as an ornament with illumination of an automobile. .
By the way, ornament refers to all decorative items such as emblems attached to automobiles and automobile manufacturer logos.

The decorative member 20 has a substantially flat rectangular shape in plan view, and both ends in the short direction are bent at an obtuse angle on the back surface side, and a cutout portion 21 is formed in the left corner portion of the decorative member 20 in the figure. A notch 22 is formed in the right corner portion of the figure 20.
The decorative member 30 has a substantially flat rectangular shape in plan view, and three side portions in plan view are bent at an obtuse angle on the back surface side, and a notch 31 is formed in the corner portion of the remaining one side excluding the three side portions. ing.

The decorative members 20 and 30 are integrally formed by injection molding of a synthetic resin material (for example, ABS resin). On the surface side of the decorative members 20 and 30, a metallic material having high reflectivity and decorative properties ( For example, a plated layer M of a chromium alloy or the like is formed, and the decorative members 20 and 30 have a light shielding property by the plated layer M.
In addition, on the surface of the plating layer M, decorative character codes, logos, and the like (not shown) are printed.

The lens 40 has a substantially flat rectangular shape in a plan view in which the left side in the figure in the longitudinal direction forms a semicircular shape, and the rear surface side of the lens 40 is formed flat, and the lens 40 has a slightly recessed mounting recess on the front surface side. 41 and 42 are formed, and an exposed portion 43 that is the left portion of the mounting recess 41 in the drawing and an exposed portion 44 that is a portion between the mounting recesses 41 and 42 are exposed from the surface of the lens 40.
The lens 40 is integrally formed by injection molding of a transparent synthetic resin material (for example, acrylic resin).

An extended portion 45 extending in the longitudinal direction of the lens 40 is formed at the right end portion of the exposed portion 43 in the short direction of the lens 40 in the figure.
Extending portions 46 and 47 extending in the longitudinal direction of the lens 40 are formed at both ends of the exposed portion 44 in the lateral direction of the lens 40.
Further, a hook-shaped engagement protrusion (engagement protrusion) 48 having a substantially triangular cross section that protrudes toward the back surface side of the lens 40 is provided upright on the entire circumference of the outer peripheral edge portion on the back surface side of the lens 40.

An inclined surface (C surface) 49 is formed in the outer peripheral edge portion on the surface side of the exposed portion 43 so that the lens 40 becomes thinner toward the outer peripheral end surface at a portion not connected to the mounting recess 41.
In addition, an inclined surface 49 is also formed at a portion of the outer peripheral edge on the surface side of the exposed portion 44 that is not connected to the mounting recesses 41 and 42.

  The sheet material 50 is a sheet shape having a size that is slightly smaller than the size of the lens 40 in plan view, and is formed of a transparent synthetic resin material. Various processing for decoration (for example, coloring processing, half mirror processing, patterning) Printing processing).

The light guide 60 has a substantially flat plate shape having the same size as the sheet material 50 in plan view, and is integrally formed by injection molding of a transparent synthetic resin material (for example, acrylic resin, polycarbonate resin, etc.).
Further, on the surface side of the light guide 60, concave portions 61 and 62 having a triangular groove shape in cross section are formed.

The housing 70 has a box shape with an upper surface opened, and includes a housing recess 71 formed in a bottom surface portion of the housing 70, and a connecting portion 72 that connects the outer peripheral edge of the housing 70 and the housing recess 71. It is integrally formed by injection molding of a resin material.
Further, a groove-like engaging recess 73 having a substantially triangular cross section is formed in the upper end surface of the entire outer peripheral edge of the housing 70.

The light emitting members 81 and 82 having the same configuration are arranged side by side along the longitudinal direction of the lighting device 10 and include an LED 83 and a wiring board 84 on which the LED 83 is mounted.
The LED 83 may be replaced with any light source (for example, a semiconductor light emitting element such as an EL element, a light bulb, or the like).

[How to assemble lighting device 10]
To assemble the lighting device 10, first, the light emitting members 81, 82 are accommodated in the housing recesses 71 of the housing 70 and fixed so that the LEDs 83 of the light emitting members 81, 82 face the opening side of the housing 70.
Then, a connector (not shown) formed on the housing 70 and a connection terminal (not shown) of the light emitting members 81 and 82 are connected by a connection cable (not shown) disposed in the housing recess 71.

Next, the light guide 60 is accommodated in the housing 70 so that the concave portions 61 and 62 of the light guide 60 face outward, and the back surface side of the outer peripheral edge of the light guide 60 is connected to the connection portion 72 of the housing 70. It is made to contact with the inner wall surface.
Subsequently, the sheet material 50 is attached onto the surface of the light guide 60, and the light guide 60 and the sheet material 50 having the same size and shape in plan view are overlapped without misalignment.

Then, the lens 40 is attached to the opening side of the housing 70 so that the mounting recesses 41 and 42 of the lens 40 face outward, and the engagement convex portion 48 on the outer peripheral edge of the rear surface side of the lens 40 is attached to the housing 70. In the state engaged with the engagement recess 73 on the upper end surface of the outer peripheral edge, the engagement protrusion 48 is engaged with the first to third joints (joint lines) P1 to P3 shown in FIG. By ultrasonic welding the recess 73, the outer peripheral edge of the lens 40 and the outer peripheral edge of the housing 70 are joined and fixed so as to be in a liquid-tight state.
Here, the dimensional shape of the engaging convex portion 48 and the engaging concave portion 73 is set so that the engaging convex portion 48 and the engaging concave portion 73 are engaged with each other without a gap.

  The method of joining and fixing the housing 70 and the lens 40 is not limited to ultrasonic welding as long as a good liquid-tight state can be obtained, and any welding method (for example, vibration welding, induction welding, high-frequency welding, (Semiconductor laser welding, thermal welding using a heater, etc.) may be used, and not only the welding method, but any method (for example, screwing, bonding, etc.) may be used.

Then, the sheet material 50 and the light guide body 60 are sandwiched and fixed between the back surface side of the lens 40 and the inner wall surface of the connection portion 72 of the housing 70, and the sheet material 50 and the light guide body 60 are fixed to the lens 40. Is positioned at the set position.
As a result, the lens 40, the sheet material 50, the light guide 60, and the housing 70 are integrated.

Thereafter, the decorative member 20, 30 is attached to the lens 40, and the decorative member 20, 30 is fitted in the mounting recess 41, 42 of the lens 40, and the lens 40 and the decorative member 20, 30 are joined and fixed. Then, the lens 40 and the surface side of the decorative members 20 and 30 are substantially flush with each other, and the lighting device 10 is integrated to complete the assembly.
As a method of joining and fixing the lens 40 and the decorative members 20 and 30, any method (for example, screwing, bonding, ultrasonic welding, etc.) may be used as long as a reliable fixing state can be obtained. .

Here, the dimensions of the mounting recesses 41 and 42 and the decorative members 20 and 30 are set so that the mounting recesses 41 and 42 of the lens 40 and the decorative members 20 and 30 are securely fitted to each other.
In addition, the extending portions 45 and 46 and the cutout portions 21 and 22 have dimensions and shapes so that the extended portions 45 and 46 of the lens 40 and the cutout portions 21 and 22 of the decorative member 20 are securely fitted, respectively. Is set.
In addition, the dimensional shape of the extending portion 47 and the cutout portion 31 is set so that the extended portion 47 of the lens 40 and the cutout portion 31 of the decorative member 30 are securely fitted.

  Thereafter, a connector (not shown) formed on the housing 70 is connected to a vehicle wire harness (not shown), and direct current power is supplied from the in-vehicle battery (not shown) to the lighting device 10 via the wire harness to emit light. The LEDs 83 of the members 81 and 82 are caused to emit light.

[Operation of Lighting Device 10]
The light emitted from the LEDs 83 of the light emitting members 81 and 82 is incident on the light guide 60 with the back surface of the light guide 60 as the incident surface, and is reflected and refracted with the inner wall surfaces of the recesses 61 and 62 of the light guide 60 as the reflecting surfaces. Then, the light guide body 60 is diffused and guided in the entire surface direction, and the entire surface of the light guide body 60 is emitted as the exit surface.
Light emitted from the light guide 60 enters the lens 40 with the back surface of the lens 40 as an incident surface, and is emitted from the surfaces of the exposed portions 43 and 44 of the lens 40 exposed from the decorative members 20 and 30.

Here, in the locations where the LEDs 83 of the light emitting members 81 and 82 are disposed and the locations where the recesses 61 and 62 of the light guide 60 are disposed, the light emitted from the LEDs 83 of the light emitting members 81 and 82 diffuses in the entire surface of the light guide 60. Is set to be.
A technique for causing the light guide 60 to function as a planar light emitting device (planar illumination device) by using reflection and refraction by the concave portions 61 and 62 formed on the surface of the light guide 60 is a known technology (for example, For example, JP 2012-43617 A will be omitted.

[Operations and effects of the embodiment]
According to the illumination device 10 of the present embodiment, the following actions and effects can be obtained.

  [1] The lighting device 10 includes an LED 83 (light source), a housing 70 in which the LED 83 is accommodated, a lens 40 in which the LED 83 is disposed on the back surface side, and a light-blocking decorative member that covers a part of the surface of the lens 40. 20, 30, exposed portions 43, 44 exposed from the decorative members 20, 30 on the surface of the lens 40, and first to third joint portions that are portions where the outer peripheral edge portion of the lens 40 and the housing 70 are joined. P1-P3.

The outer peripheral edge of the lighting device 10 is formed by the outer peripheral edge of the lens 40 and the outer peripheral edges of the decorative members 20 and 30.
The first joint portion P1 is disposed on the back side of the outer peripheral edge portions of the exposed portions 43 and 44.
The second joint portion P2 is disposed on the back side of the outer peripheral edge portions of the decorative members 20 and 30.
The third joint portion P3 is a portion that connects the first joint portion P1 and the second joint portion P2, and is disposed on the back side of the decorative members 20 and 30.

In the illuminating device 10, the radiated light of the LED 83 is radiated from the exposed portions 43 and 44 of the lens 40 to the outside of the illuminating device 10, and the entire exposed portions 43 and 44 of the lens 40 emit light, thereby realizing an excellent aesthetic appearance.
Here, in the illuminating device 10, since the 3rd junction part P3 is arrange | positioned on the back surface side of the decoration members 20 and 30 (in other words, the 3rd junction part P3 is made to sneak under the decoration members 20 and 30). Therefore, the area of the exposed portions 43 and 44 can be increased by the area of the third joint portion P3 as compared with the case where the third joint portion P3 is disposed on the back side of the exposed portions 43 and 44. , Design properties can be improved.

By the way, when the 3rd junction part P3 is arrange | positioned on the back surface side of the exposed parts 43 and 44, light is not radiated | emitted from the part located above the 3rd junction part P3 in the exposed parts 43 and 44, and the part Since this is a non-light emitting portion, the non-light emitting portion becomes very conspicuous by contrast with the exposed portions 43 and 44 that emit light as a whole, and the sense of unity of the lighting device is impaired, so that the appearance is significantly deteriorated. There is a drawback.
On the other hand, in the illuminating device 10, since the 3rd junction part P3 is arrange | positioned at the back surface side of the decoration members 20 and 30, a non-light-emitting part does not exist and it can prevent that the unity feeling of an illuminating device is impaired. Therefore, the design properties can be further enhanced.

  Moreover, in the illuminating device 10, although the 3rd junction part P3 is arrange | positioned at the back surface side of the decoration members 20 and 30, and the 3rd junction part P3 is coat | covered with the decoration members 20 and 30, 3rd junction part P3 is covered. Since it is a part which connects the 1st junction part P1 and the 2nd junction part P2, it is possible to make small the area of the part which coat | covers the 3rd junction part P3 in the decoration members 20 and 30, and it exposes only that much. Since the areas of the portions 43 and 44 are increased, the design can be further improved.

[2] The outer peripheral edge of the exposed portions 43 and 44 of the lens 40 is provided with an inclined surface 49 formed so that the lens 40 becomes thinner toward the outer peripheral end surface, and the inclined surface 49 covers the first joint P1. To do.
Here, the 1st junction part P1 is arrange | positioned at the back surface side of the outer periphery part of the exposed parts 43 and 44, and when the 1st junction part P1 is formed especially using ultrasonic welding, it is 1st. The appearance of the joint P1 is deteriorated.

On the other hand, in the illuminating device 10, the lens 40 is moved from the outside of the illuminating device 10 due to reflection on the inclined surface 49 of the lens 40 indicated by an arrow α in FIG. 3 and refraction (not shown) on the inclined surface 49. Since it becomes difficult to see the 1st junction part P1 through, the design property can be improved.
Further, since the inclined surface 49 of the lens 40 covers both the end portion of the sheet material 50 and the end portion of the light guide 60, the gap portion between these end portions and the housing 70 is reflected or refracted by the inclined surface 49. As a result, it becomes difficult to see through the lens 40 from the outside of the illumination device 10, so that the design can be improved.

[3] The illuminating device 10 includes a hook-shaped engaging convex portion 48 formed on the outer peripheral edge portion of the lens 40 and a groove-shaped engaging concave portion 73 formed on the outer peripheral edge portion of the housing 70. By engaging the mating convex portion 48 with the engaging concave portion 73, the lens 40 and the housing 70 are joined in a liquid-tight state.
Therefore, since it is possible to prevent the liquid from entering the housing 70, the light emitting members 81 and 82 (LED 83 and wiring board 84) accommodated in the housing 70 are not exposed to the liquid, and the waterproofness can be improved. .

  [4] Since the illumination device 10 includes the plate-shaped light guide 60 disposed between the lens 40 and the LED 83, the lens 40 can be formed into a substantially plate shape having a large area. ] Can be further enhanced.

<Another embodiment>
The present invention is not limited to the above-described embodiment, and may be embodied as follows, and even in that case, operations and effects equivalent to or higher than those of the above-described embodiment can be obtained.

[A] In the above embodiment, the engaging convex portion 48 is formed on the lens 40, and the engaging concave portion 73 is formed on the housing 70.
However, an engagement recess may be formed in the lens 40, an engagement protrusion may be formed in the housing 70, and the engagement recess of the lens 40 and the engagement protrusion of the housing 70 may be engaged.

  [B] The plating layer M may be omitted from the decorative members 20 and 30. In this case, for example, the decorative members 20 and 30 are formed of a light-shielding material, or light shielding is performed on the surfaces of the decorative members 20 and 30. What is necessary is just to materialize the decoration members 20 and 30 which have light-shielding property by giving the coating which has property.

  [C] The decorative members 20 and 30, the lens 40, the sheet material 50, and the light guide 60 may have any planar shape.

[D] The number of light emitting members 81 and 82 is not limited to two, and an appropriate number of three or more may be provided.
In that case, the concave portions 61 and 62 of the light guide 60 may be provided for each light emitting member, as in the above embodiment.

  [E] The lighting device 10 is applied to an ornament with illumination of a car, but the present invention is not limited to a vehicle, and may be applied to lighting of any article (for example, an electric product, furniture, etc.). .

  The present invention is not limited to the description of each aspect and the embodiment. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims. The contents of publications and the like specified in the present specification are all incorporated by reference.

DESCRIPTION OF SYMBOLS 10 ... Illuminating device 20, 30 ... Decoration member 40 ... Lens 48 ... Engaging convex part 49 of lens 40 ... Inclined surface 60 of lens 40 ... Light guide 70 ... Housing 73 ... Engaging concave part 81, 82 of housing 73 ... Light emission Member 83 ... LED (light source)
P1 ... 1st junction part P2 ... 2nd junction part P3 ... 3rd junction part

Claims (4)

A light source that emits light;
A housing containing the light source;
A lens in which the light source is disposed on the back side;
A decorative member having a light shielding property covering a part of the surface of the lens;
An exposed portion exposed from the decorative member on the surface of the lens;
A lighting device including first to third joint portions, which are portions where the outer peripheral edge portion of the lens and the housing are joined,
The outer peripheral edge of the illumination device is formed by the outer peripheral edge of the lens and the outer peripheral edge of the decorative member,
The first joint portion is disposed on the back side of the outer peripheral edge of the exposed portion,
The second joint is disposed on the back side of the outer peripheral edge of the decorative member,
The said 3rd junction part is a part which connects the said 1st junction part and the said 2nd junction part, and is an illuminating device arrange | positioned at the back surface side of the said decoration member. The outer peripheral edge of the exposed portion includes an inclined surface formed so that the lens becomes thinner toward the outer peripheral end surface,
The inclined surface covers the first joint;
The lighting device according to claim 1. A plate-shaped light guide disposed between the lens and the light source;
The inclined surface covers an end of the light guide;
The lighting device according to claim 2. A hook-like engagement convex portion formed on either the lens or the housing;
A groove-shaped engaging recess formed on the other of the lens or the housing,
By engaging the engagement convex portion with the engagement concave portion, the lens and the housing are joined in a liquid-tight state.
The illuminating device as described in any one of Claims 1-3.

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