JPH09258675A - Light emitting implement and light emitting device formed by using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the implement usable over a wide area for signboards, electrical illumination of store entrances, etc., by forming plural recessed curved surface parts for diffusing light to the inside surfaces of housing recessed parts for housing LED lamps and forming at least a part of the outside surfaces thereof as curved surfaces. SOLUTION: Translucent covers 2 are so formed that the upper parts thereof have an approximately conical shape and the lower parts in succession thereto are formed to a cylindrical shape. The housing recessed parts for housing the LED lamps 4 are formed within these covers 2 and the recessed curved surface parts for diffusing the light cast from the LED lamps 4 to the outer periphery side of the covers 2 are formed. In such a case, the spherical hole parts 2b, sectionally arc-shaped groove parts 2c and sectionally arc-shaped longitudinal groove parts 2d formed in the housing recessed parts intricately reflect and refract the light from the LED lamps 4 and diffuse the light through the covers 2 to their peripheral side parts. As a result, the circumferences of the light emitting implements 1 are brightly illuminated when the light emitting implements 1 are used by mounting the implements at electrical illumination signboards, etc., and, therefore, the signboards, etc., are distinctly visually recognized not only from the front surface side of the light emitting implements 1 but from the peripheral flanks thereof as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting device used for a signboard, an electric decoration at a store entrance, an illumination, a chandelier, or the like, and a light emitting device using the same.

[0002]

2. Description of the Related Art Conventionally, a miniature lamp consisting of an incandescent light bulb has been used as a light emitting device used for a lighting device for decoration such as illumination, illumination and chandelier. This bean lamp has poor durability and must be replaced frequently. Moreover, when a miniature lamp is used for a signboard or the like placed at a high place, the replacement is troublesome. And the mini lamp consumes a lot of power.

Therefore, it is conceivable to use a light emitting diode (hereinafter referred to as LED), an optical fiber, or a xenon tube lamp, which has excellent durability and consumes less power.

[0004]

However, since the above-mentioned LED, optical fiber and xenon lamp have good directional characteristics of light in only one direction and are inferior in diffusivity, they are widely diffused by decorative lighting such as signboards. It is not suitable for conspicuousness in multiple directions, and when it is desired to have diffusiveness for light, a large number must be used in close contact, which is expensive and impractical. there were.

Therefore, an object of the present invention is to diffuse light to the surroundings even when using a light-emitting material such as an LED, an optical fiber, and a xenon lamp, which has a weak light diffusing property, and can be used for signboards and store entrances. An object of the present invention is to provide a light emitting device that can be used inexpensively even in a wide area such as an electric decoration and a light emitting device using the light emitting device.

[0006]

As a means for achieving the above object, the invention of claim 1 has a light emitting body, a translucent cover body for covering the light emitting body, and a substrate. It is a light emitting diode lamp, and a housing recess for housing the light emitter is formed inside the translucent cover body, and a plurality of concave curved surface portions for diffusing light emitted from the light emitter are formed on the inner surface of the light emitter housing recess. And the translucent cover body is a light-emitting device in which at least a part of its outer surface is formed into a curved surface.

In the above description, the concave curved surface portion is a spherical surface or 2
It includes a concave portion having a quadric surface, and the light incident on the concave curved surface is reflected and refracted to diffuse the light. Then, unevenness is formed by providing a plurality of concave curved surface portions.

A second aspect of the present invention is the light-emitting device according to the first aspect, wherein the light-emitting body is an optical fiber lamp.

A light emitting device according to a third aspect is the light emitting device according to the first aspect, wherein the light emitter is a xenon lamp.

A fourth aspect of the present invention is the light-emitting device according to any one of the first to third aspects, wherein at least a part of the concave curved surface section is arcuate in cross section facing the peripheral side surface of the translucent cover body. Is formed in the groove portion, and a ridge portion is formed along the groove portion.

A fifth aspect of the present invention is the light-emitting device according to any one of the first to third aspects, wherein at least a part of the concave curved surface portion is a plurality of small hole portions formed in close contact with each other. Since this small hole portion also forms at least a part of the concave curved surface portion, it has a curved surface.

According to a sixth aspect of the present invention, there is provided the light emitting device according to any one of the first to third aspects, wherein at least a part of the concave curved surface section is a circular cross section facing the peripheral side surface of the translucent cover body. It is composed of a groove portion formed in an arc shape and a plurality of small hole portions formed in close contact with each other.

A seventh aspect of the present invention is the light-emitting device according to any one of the fourth and sixth aspects, wherein the concave curved surface portion is a hole formed of a spherical surface formed facing the top of the translucent cover body. It includes a part.

An eighth aspect of the present invention is the light-emitting device according to any one of the first to seventh aspects, wherein the translucent cover body has a spherical top surface.

According to a ninth aspect of the present invention, there is provided the light emitting device according to any one of the first to eighth aspects, wherein the outer peripheral side portion on the top side of the translucent cover body is formed into a stepped arcuate curved surface. There is.

The invention according to claim 10 is the light emitting device according to any one of claims 1 to 9, wherein the light emitting device is detachably fitted to a translucent cover. A translucent cap member that covers the cover body is provided.

The invention of claim 11 has a light emitting body, a translucent cover body for covering the light emitting body, and a substrate, and the light emitting body is a light emitting diode lamp. A translucent cap member that is detachably fitted to the translucent cover body and covers the translucent cover body is provided, and the translucent cap member is provided with a recessed portion that accommodates the translucent cover body. A plurality of concave curved surface portions for diffusing light emitted from the light emitting body are formed on the inner surface.

A twelfth aspect of the present invention is the light-emitting device according to the eleventh aspect, wherein the light-emitting body is an optical fiber lamp.

A thirteenth aspect of the present invention is the light-emitting device according to the eleventh aspect, wherein the light-emitting body is a xenon lamp.

The invention of claim 14 is the invention of claims 11 to 1.
3. The light emitting device according to any one of 3, wherein at least a part of the concave curved surface portion has a hole portion having a spherical surface formed facing the top portion of the translucent cap member, and a peripheral portion of the translucent cap member. And a groove portion having a circular arc cross section facing the side surface.

The fifteenth aspect of the invention is the first to fourteenth aspects.
A light emitting device in which a plurality of the light emitting devices according to any one of 1 to 3 are provided on a rail portion, and the rail portion is provided with a space holding member for holding a space between the light emitting devices.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. 1, 3 and 5 show a light emitting device according to a first embodiment of the present invention. The light emitting device 1 has a translucent cover 2, a substrate 3 and an LED lamp 4 as main components. The LED lamp 4 is preferably an ultra-high brightness LED.

The light-transmitting cover 2 is preferably a light-transmitting member, for example, an integrally molded product of acrylic resin. The light-transmitting cover 2 has an upper portion formed in a substantially conical shape, and a lower portion following the upper portion is formed in a cylindrical shape. A housing recess 2 a for housing the LED lamp 4 is formed inside the translucent cover 2. A concave curved surface portion for diffusing light emitted from the LED lamp 4 to the outer peripheral side of the translucent cover 2 is formed on the inner surface of the housing concave portion 2a. That is, L
The light emitted from the ED lamp 4 has strong directivity to the front side (upper side in the figure) of the LED lamp 4 and weak diffusivity, so that this light is diffused to the peripheral side portion of the translucent cover 2. First, a spherical hole 2b is formed in a portion facing the top of the translucent cover 2. The spherical hole 2b diffuses the light emitted from the LED lamp 4 to the front side to the peripheral side and the inward side of the housing recess 2a by the lens effect. The accommodation recess 2a on the lower side of the spherical hole 2b is shown in FIG.
As shown in (a), it is formed in a spherical portion (dome-shaped portion) that is slightly larger than the spherical hole portion 2b, and this spherical portion (dome-shaped portion) is formed in the axial direction of the translucent cover 2. A groove 2c having an arcuate cross section is continuously provided along the groove 2c. An axial ridge is formed between the groove portions 2c. The groove portion 2c having an arcuate cross section also serves to diffuse the light from the LED lamp 4 to the peripheral side portion of the translucent cover 2 by the lens effect. Further, a vertical groove portion 2d having an arcuate cross section along the axial direction of the translucent cover 2 is continuously provided below the groove portion 2c having an arcuate cross section, and a ridge is formed between the vertical groove portions 2d. There is. The vertical groove portion 2d also serves to diffuse the light from the LED lamp 4 to the peripheral side portion of the translucent cover 2 by the lens effect. In this manner, the spherical hole 2b, the arcuate cross-section groove 2c, and the arcuate cross-section vertical groove 2d formed in the accommodation recess 2a reflect and refract light from the LED lamp 4 in a complicated manner, and thus the translucent cover 2 When the light emitting device is attached to an illuminated signboard or the like and used, the surroundings of the light emitting device 1 are brightly illuminated so that not only the front side of the light emitting device 1 but also the front side of the light emitting device 1 are transmitted. , It will be clearly visible from the direction of the peripheral surface.

As described above, since the light emitting device 1 of the present embodiment sufficiently diffuses the light from the LED lamp 4 by the spherical or arcuate curved surface formed on the inner surface thereof, the light is diffused on the outer surface thereof. The structure for this does not necessarily have to be provided. Therefore, since it may be formed in a simple dome shape, or a decorative shape such as a doll may be formed, the degree of freedom in design and decorativeness are enhanced.

Further, in the light emitting device 1, a spherical surface portion 2e is formed on the outer surface of the top portion thereof. Further, the substantially conical portion on the upper portion of the outer peripheral surface is formed as a step-shaped ring-shaped portion 2f having an arc-shaped cross section. Such spherical surface portion 2e and ring-shaped portion 2f
Also, due to the lens effect, the light from the LED lamp 4 is complicatedly reflected, refracted, and diffused to the peripheral side portion. Further, since this outer surface shape is basically formed by a curved surface, it is highly safe in use.

As shown in FIG. 5A, the substrate 3 has L
A mounting hole 3a for mounting the ED lamp 4 is formed, and a terminal 5 into which the leg 4a of the LED lamp 4 is fitted is fitted into the mounting hole 3a, and the terminal 5 is projected from the bottom surface of the substrate 3. . The substrate 3 is made of a translucent cover 2 with an adhesive.
Fixed to A reflector may be provided on the upper surface of the substrate 3 by superposition. The light emitting device 1 assembled in this way
FIG. 1 shows a light emitting device in which a plurality of light emitting devices are arranged side by side. In this light emitting device, a light emitting device 1 is mounted on a rail member 7 via a pedestal portion 6.
It is attached to. The rail member 7 has a long groove 7
a is formed, and the flat cable 8 is embedded in the long groove 7a. The flat cable 8 is connected to the power cord 9. The substrate 3 of the light emitting device 1 is fixed to the U-shaped pedestal portion 6 with an adhesive or the like, and the pedestal portion 6 is fixed to the rail member 7 with an adhesive or the like. A hole (not shown) for inserting the terminal 5 of the LED lamp 4 is formed in the pedestal portion 6, and the terminal 5 is connected to the flat cable 8. When the light emitting device 1 is attached to the rail member 7, a U-shaped blindfold plate 10 that holds the space between the light emitting devices 1 and 1 is attached. Therefore, if the length of the blind plate 10 is adjusted, the interval between the light emitting devices 1 and 1 can be adjusted, and fine positioning at the time of mounting is unnecessary. The light emitting device assembled in this manner is attached to an illuminated signboard, a frame body at the entrance of a building, or the like with an adhesive, a screw, or the like.

FIG. 2 shows a rail member 70 according to another embodiment. This light emitting device is an example in which the light emitting device and the power source are connected by the lead wire 11 instead of the flat cable. A recess 70a is formed in the rail member 70, and the lead wire 11 is housed in the recess 70a. Blindfold 1
The use of 0 attached to the rail member 70 is the same as in the above embodiment.

FIGS. 4 and 6 show a second embodiment of the translucent cover 2 used in the light emitting device 1. In the translucent cover 2, a small hole portion 2g extending in the axial direction of the translucent cover 2 is closely formed in a housing recess 2a for housing the LED lamp 4. As shown in FIG. 6 (b), the small holes 2g are radially arranged from the axis of the translucent cover 2 and are densely arranged with the axes of the small holes 2g, 2g ... is there. The small hole 2g has a circular cross section and a spherical bottom. Therefore, the small hole portion 2g finely diffuses the light from the LED lamp 4 by the lens effect. In this embodiment, two LED lamps 4 are used.

7A to 7C show a light emitting device 100 provided with a transparent cap member 12 which is detachably fitted to the transparent cover 2 and which houses and covers the transparent cover 2. Is shown. In the light emitting device 100, the cover that covers the LED lamp 4 has a substantially double structure. The inner translucent cover 2 is similar to the cover part of the mini lamp,
A translucent member having a uniform thickness is formed in a substantially mountain shape, and no unevenness such as a curved surface for diffusing light is formed. On the other hand, the light-transmissive cap member 12 has, as in the light-transmissive cover 2 of each of the above-described embodiments, an unevenness formed by a curved surface for diffusing light on the inner surface thereof. As a structure for the light diffusion, an accommodating recess 12a for accommodating the translucent cover 2 is formed inside the translucent cap member 12, and the accommodating recess 12a has an inner surface for accommodating the light emitting device 100. Spherical hole 1 at the site facing the top
2b is formed. This spherical hole 12b is an LED
The light radiated from the lamp 4 to the front side is diffused inward by the lens effect to the peripheral side and the inner side of the housing recess 12a. A substantially cylindrical portion having a diameter larger than that of the spherical hole portion 12b is formed in the accommodation recess 12a below the spherical hole portion 12b, and a cross-sectional circle along the axial direction of the translucent cap member 12 is formed on the inner surface thereof. The arc-shaped groove 12c is continuously provided. And each groove 12
An axial ridge is formed between c and 12c. Further, below that, a substantially cylindrical portion having a diameter larger than that of the substantially cylindrical portion having the groove 12c is formed, and an inner surface thereof is provided with a groove portion 12d having an arcuate cross section continuously along the axial direction. 1
A ridge is formed between 2d. These groove portions 12c and 12d having an arcuate cross section also serve to diffuse the light emitted from the LED lamp 4 and transmitted through the translucent cover 2 to the peripheral side portion of the translucent cap member 12 by the lens effect.

Since the inner diameter of the substantially cylindrical portion of the translucent cap member 12 in which the groove 12c is formed is substantially the same as the outer diameter of the translucent cover 2, the translucent cap is formed. The member 12 can be fitted to the translucent cover 2 and is detachable.

The outer surface of the translucent cap member 12 is
The top portion of the spherical portion 12 corresponds to the spherical hole portion 12b.
e, and the lower peripheral side portion thereof is formed as a curved trapezoidal portion 12f. Therefore, this outer surface configuration also further enhances the lens effect of diffusing light. Further, since this outer surface shape is basically formed by a curved surface, it is highly safe in use.

It is preferable that both the transparent cover 2 and the transparent cap member 12 are integrally molded products of acrylic resin. Further, the translucent cover 2 may be provided so that it can be fitted to the substrate 3.

In such a light emitting device 100, since the translucent cap member 12 can be easily attached and detached, it is easy to replace the translucent cap member 12 when it is soiled, and the LED lamp 4 has a high sealing property. Therefore, the durability is also improved. further,
If a plurality of translucent cap members 12 having a decorative shape on the outer surface are prepared and appropriately replaced, the decorative property can be enhanced. Since other configurations are substantially the same as those of the above-described light emitting device 1, corresponding members are designated by the same reference numerals.

In the light emitting device 100, a concave curved surface portion for diffusing light is formed on the light transmitting cap member 12 side. On the contrary, the first and second embodiments are made. As shown in the light emitting device 1, the translucent cap member 12 may not have such a structure by forming a concave curved surface portion or the like for diffusing light on the translucent cover 2 side. Even in this case, the translucent cap member can be replaced, and various decorative shapes can be applied, as in the above-described embodiment.

LED which is a light emitting body in each of the above embodiments
The lamp 4 may be replaced with an optical fiber or a xenon lamp. Since these optical fibers or xenon lamps have strong directional characteristics of light in one direction and weak diffusivity, the structure of the translucent cover for diffusing light shown in each of the above embodiments is effective.

[0036]

According to the first aspect of the present invention, a housing recess for housing an LED lamp is formed inside a translucent cover body, and a plurality of concave curved surfaces for diffusing light are formed on an inner surface of the housing recess. Since at least a part is formed into a curved surface, light can be diffused in the peripheral side surface direction of the translucent cover body by a lens effect, and it can be used for a large area such as a signboard or a store entrance lighting. Since it is a light emitting device and uses an LED lamp, it has high durability, and it is inexpensive because it can be used in a small number.

Since the inventions of claims 2 and 3 use an optical fiber lamp or a xenon lamp as a light emitting body, the same effects as those of the invention of claim 1 can be obtained.

According to a fourth aspect of the present invention, at least a part of the concave curved surface portion is formed in a groove portion having an arcuate cross section facing the peripheral side surface of the translucent cover body, and a ridge portion is formed along the groove portion. Therefore, the diffusibility of light is excellent due to the lens effect of the groove and the reflection effect of the ridge.

According to the fifth aspect of the present invention, since at least a part of the concave curved surface portion is a plurality of small holes formed in close contact with each other, light can be diffused finely.

According to the sixth aspect of the present invention, at least a part of the concave curved surface portion is formed in the circular arc groove portion and the small hole portion, so that the diffusion of light to the peripheral side surface is improved.

According to the seventh aspect of the present invention, since a spherical hole is formed in the concave curved surface portion so as to face the top of the transparent cover body, light in the top direction (front side) of the transparent cover body is formed. Can be particularly diffused.

According to the eighth aspect of the present invention, since the top of the transparent cover is formed into a spherical surface, it is possible to improve the diffusibility of light toward the top (front side) of the transparent cover.

According to the ninth aspect of the present invention, since the outer peripheral side portion on the top side of the translucent cover body is formed into a stepped arcuate curved surface in cross section, the diffusion of light to the outer peripheral side portion is improved.

According to the tenth aspect of the invention, the translucent cap member can be easily attached and detached, so that it can be easily replaced, and since it has a double structure, the hermeticity is high and the durability is improved. According to the invention of claim 11, which also improves decorativeness, a translucent cap member is detachably fitted to a translucent cover body accommodating the LED lamp, and light is diffused to the inner surface of the recess of the translucent cap member. Since a plurality of concave curved surface portions are formed, the light from the LED lamp can be diffused in the circumferential side surface direction of the light emitting device, and the translucent cap member, which is a member for this light diffusion, can be easily replaced. Therefore, the LED lamp 4 has high airtightness and improved durability. Further, since the outer shape of the translucent cap member has a decorative shape and can be replaced, the decorative property is also improved.

In the twelfth and thirteenth aspects of the invention, since the light-emitting body is an optical fiber lamp or a xenon lamp, the same effect as that of the eleventh aspect of the invention can be obtained.

In the fourteenth aspect of the present invention, since the concave curved surface portion of the translucent cap member is composed of the spherical hole portion and the groove portion having the arcuate cross section, the light diffusing property is excellent.

According to the fifteenth aspect of the present invention, the rail portion is provided with the space holding member for holding the space between the light emitting devices.
The arrangement and attachment of the light emitting device are easy.

[Brief description of drawings]

FIG. 1 is a perspective view of a light emitting device.

FIG. 2 is a perspective view of another embodiment of the rail member.

FIG. 3 is a perspective view of the light emitting device of the first embodiment.

FIG. 4 is a perspective view of a light emitting device of a second embodiment.

5A is a cross-sectional view of the light emitting device of the first embodiment, and FIG. 5B is a bottom view thereof.

FIG. 6 (a) is a sectional view of a light emitting device of a second embodiment, and FIG. 6 (b) is a bottom view thereof.

7 (a) is a perspective view of a light emitting device having a translucent cap member, FIG. 7 (b) is a perspective view of the translucent cap member, and FIG. 7 (c) is a perspective view thereof. It is a bottom view.

FIG. 8

[Explanation of symbols]

 1,100 Light emitting device 2 Transparent cover body 2a, 12a Housing recessed portion 2b, 12b Concave curved surface portion (spherical hole portion) 2c, 12c Concave curved surface portion (circular arc groove portion in cross section) 2d Concave curved surface portion (vertical groove portion in cross section) 2e , 12e curved surface part (spherical surface part) 2f curved surface part (circular arc-shaped cross-section part) 2g concave curved surface part (small hole part) 12d concave curved surface part (arc-shaped groove part in cross section) 12f curved surface part (substantially trapezoidal part) 3 substrate 4 light emission Diode lamp 7 Rail member 10 Spacing member (blind plate)

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[Procedure amendment]

[Submission date] July 11, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of drawings]

FIG. 1 is a perspective view of a light emitting device.

FIG. 2 is a perspective view of another embodiment of the rail member.

FIG. 3 is a perspective view of the light emitting device of the first embodiment.

FIG. 4 is a perspective view of a light emitting device of a second embodiment.

5A is a cross-sectional view of the light emitting device of the first embodiment, and FIG. 5B is a bottom view thereof.

FIG. 6 (a) is a sectional view of a light emitting device of a second embodiment, and FIG. 6 (b) is a bottom view thereof.

7 (a) is a perspective view of a light emitting device having a translucent cap member, FIG. 7 (b) is a perspective view of the translucent cap member, and FIG. 7 (c) is a perspective view thereof. It is a bottom view.

[Explanation of reference numerals] 1,100 light emitting device 2 transparent cover body 2a, 12a accommodating concave portion 2b, 12b concave curved surface portion (spherical hole portion) 2c, 12c concave curved surface portion (circular arc groove portion) 2d concave curved surface portion (circular cross section) Arc-shaped vertical groove portion) 2e, 12e Curved surface portion (spherical surface portion) 2f Curved surface portion (circular arc-shaped cross-section portion) 2g Concave curved surface portion (small hole portion) 12d Concave curved surface portion (circular arc-shaped groove portion) 12f Curved surface portion (substantially trapezoidal portion) ) 3 substrate 4 light emitting diode lamp 7 rail member 10 spacing member (blind plate)

Claims (15)

[Claims] 1. A light-emitting body, a light-transmitting cover body that covers the light-emitting body, and a substrate, wherein the light-emitting body is a light-emitting diode lamp, and the light-emitting body is provided inside the light-transmitting cover body. Is formed, and a plurality of concave curved surface portions for diffusing light emitted from the light-emitting body is formed on the inner surface of the light-emitting body housing recess, and the translucent cover body is A light-emitting device, characterized in that at least a part of its outer surface is formed into a curved surface. 2. The light emitting device according to claim 1, wherein the light emitting body is an optical fiber lamp. 3. The light emitting device according to claim 1, wherein the light emitting body is a xenon lamp. 4. The recessed curved surface portion according to claim 1, wherein at least a part of the concave curved surface portion is formed in a groove portion having an arc-shaped cross section facing the peripheral side surface of the translucent cover body. A light-emitting device, wherein a ridge is formed along the groove. 5. The light emitting device according to claim 1, wherein at least a part of the concave curved surface portion is a plurality of small hole portions formed in close contact with each other. 6. The groove portion formed according to claim 1, wherein at least a part of the concave curved surface portion is formed in an arc-shaped cross section so as to face a peripheral side surface of the translucent cover body. A light emitting device comprising a plurality of small holes formed in close contact with each other. 7. The concave curved surface portion according to claim 4, wherein the concave curved surface portion includes a hole portion formed of a spherical surface facing the top portion of the translucent cover body. Luminaire. 8. The light emitting device according to claim 1, wherein the translucent cover body has a spherical top surface. 9. The light emitting device according to claim 1, wherein an outer peripheral side portion on the top side of the translucent cover body is formed into a stepped arc-shaped curved surface in cross section. . 10. The translucent cap member according to claim 1, wherein the light emitting device is detachably fitted to the translucent cover body and covers the translucent cover body. A light-emitting device characterized by being provided. 11. A light emitting body, a translucent cover body covering the light emitting body, and a substrate, wherein the light emitting body is a light emitting diode lamp, and the light transmissive cover body is detachably fitted to the light transmissive cover body. A translucent cap member is provided to cover the translucent cover body, and a concave portion of the translucent cap member that accommodates the translucent cover body has a light irradiated from the light-emitting body on its inner surface. A light-emitting device having a plurality of concave curved surface portions for diffusing light. 12. The light-emitting body according to claim 11,
A light-emitting device characterized by being an optical fiber lamp. 13. The light-emitting body according to claim 11,
A light emitting device characterized by being a xenon lamp. 14. The method according to claim 11, wherein at least a part of the concave curved surface portion has a spherical portion formed to face a top portion of the translucent cap member, and the hole portion has a spherical surface. A light emitting device, comprising: a groove portion having an arc-shaped cross section facing the peripheral side surface of the translucent cap member. 15. A light emitting device having a plurality of light emitting devices according to any one of claims 1 to 14 provided on a rail portion, wherein the rail portion has a space for maintaining a space between the respective light emitting devices. A light-emitting device comprising a holding member.