JP2018137067A - Waterproof joint structure of light-emitting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof joint structure of a light emitting device, in which an LED light source arranged inside a joint member is not likely to be damaged due to water getting wet, and the device can be efficiently assembled. SOLUTION: In a waterproof joint structure of a light emitting device composed of connecting a plurality of light guide rods 1, 1 ..., a plurality of peripheral surface light emitting type light guide rods 1 and 1; LED light sources 2 and 2 arranged in close proximity to each other; a joint member 3 in which recesses 31 and 31 are provided on at least two different surfaces and the LED light sources 2 and 2 are fixed in these recesses 31 and 31. And; A light-transmitting sealing plug 4 that is mounted in the recess 31 of the joint member 3 without a gap and is arranged between the LED light source 2 and the end face of the light guide rod 1 in the recess 31. A transparent soft resin or an elastomer was used as the material of the sealing stopper 4. [Selection diagram] Fig. 1

Description

  The present invention improves the joint structure of the light emitting device, and more specifically, not only can a plurality of light guide rods be connected via the joint member, but also the LED light source disposed inside the joint member The present invention relates to a waterproof joint structure of a light-emitting device that does not have a risk of breakdown due to moisture or the like.

  In recent years, in the field of light decoration and the like, the use of light emitting devices using peripheral light emitting type light guide rods (specifically, rods having a core layer and a clad layer having a predetermined refractive index difference) has progressed. It is out. When these light emitting devices are enlarged, the light guide distance from one light source is limited, and therefore, a plurality of light guide bars are often connected and assembled through a joint member with a light source.

  In addition, the applicant has previously developed a joint member with an LED light source and has filed a patent application. However, since the conventional joint member with a light source has not been provided with waterproofing measures, the light emitting device can be used outdoors. When used, water droplets and moisture that have entered the inside of the joint member wet the LED light source, causing the LED light source to malfunction.

  On the other hand, conventionally, in the connection structure between the light source device and the light guide rod (light transmission tube), a flange-type base is attached to the end of the light guide rod, and the projection of the base and the cylindrical joint portion of the light source device A technology is also known in which a ring-shaped packing member is placed between the joint portion and a cap nut-type cap member is tightened into the joint portion to prevent water droplets or moisture from entering the joint portion. (See Patent Document 1).

  However, regarding the waterproof structure described in the above-mentioned document 1, after assembling the light emitting device, after inserting the light guide rod into the insertion hole of the cap member, the base is fixed to the end portion of the light guide rod by caulking or the like. In addition, since it was necessary to tighten the cap member into the joint part with the cap attached with the packing inserted into the joint part, there was a disadvantage that the assembly work of the equipment at the site could not be performed efficiently. .

JP-A-9-171128

  The present invention has been made in view of the above-described problems, and the object of the present invention is to connect a plurality of light guide rods via a joint member, and to arrange the light guide rods inside the joint member. It is an object of the present invention to provide a waterproof joint structure for a light emitting device that does not cause the LED light source to break down due to water soaking and that can efficiently assemble the device.

  Means employed by the present inventor for solving the above-described problems will be described with reference to the accompanying drawings.

  That is, the present invention relates to a waterproof joint structure of a light-emitting fixture constituted by connecting a plurality of light guide bars 1, 1. LED light sources 2 and 2 arranged close to the end face; at least two or more different surfaces provided with recesses 31 and 31 in which the LED light sources 2 and 2 are fixed A member 3; a light-transmitting hermetically mounted between the LED light source 2 in the recess 31 and the end surface of the light guide rod 1 and mounted in the recess 31 of the joint member 3 without a gap. It is characterized by including a stopper 4 and using a transparent soft resin or elastomer as the material of the sealing stopper 4.

  Further, the sealing plug 4 is preferably a concave lens shape in order to increase the light incident efficiency from the LED light source 2 to the light guide rod 1.

  Further, a ring-shaped packing member 5 that is compressed between the outer peripheral surface of the light guide rod 1 inserted into the concave portion 31 and the inner wall surface of the concave portion 31 is disposed in the concave portion 31 of the joint member 3. By doing, a waterproof effect can be heightened more.

  Further, in the present invention, in order to enhance the waterproof effect, the light guide rod is formed in a portion capable of covering the outer peripheral surface of the joint member 3 and covering the opening of the concave portion 31 of the joint member 3. A cap member 6 provided with an insertion hole 61 into which 1 is inserted can be attached. In this case, a soft resin or elastomer having a thermal conductivity of 1.5 W / m · K or more is used as the material of the cap member 6. It can be used to increase heat dissipation.

  In the present invention, in order to enhance the waterproof effect, the outer peripheral surface of the joint member 3 and the outer peripheral surface of the light guide rod 1 can be integrally covered with the heat shrinkable tube 7.

  On the other hand, in the present invention, regardless of the presence or absence of the sealing plug 4, as a waterproof joint structure of the light emitting device, a plurality of circumferential light emitting type light guide bars 1, 1; The LED light sources 2 and 2 to be arranged; at least two or more different surfaces, provided with concave portions 31 and 31; and the joint members 3 in which the LED light sources 2 and 2 are fixed in the concave portions 31 and 31; A structure including a light guide rod 1 inserted into the recess 31 of the joint member 3 and a ring-shaped packing member 5 in a compressed state between the inner wall surface of the recess 31 is adopted. You can also

  As for the material of the packing member 5, it is preferable to use a soft resin or elastomer having a visible light transmittance of 10% or less in order to suppress light leakage to the outside of the light guide rod 1.

  On the other hand, in the present invention, regardless of the presence or absence of the sealing plug 4 or the packing member 5, as a waterproof joint structure of the light emitting device, a plurality of circumferential light emitting type light guide bars 1, 1; LED light sources 2 and 2 arranged close to each other; at least two or more different surfaces provided with recesses 31 and 31 and the LED light sources 2 and 2 fixed in the recesses 31 and 31 3; an insertion hole 61 into which the light guide rod 1 is inserted is provided in a portion that can cover the outer peripheral surface of the joint member 3 and covers the opening of the concave portion 31 of the joint member 3. In this case, a soft resin or elastomer having a thermal conductivity of 1.5 W / m · K or more is used as the material of the cap member 6.

  As for the material of the joint member 3, it is preferable to use a resin material having a thermal conductivity of 1.5 W / m · K or more in order to ensure sufficient heat dissipation.

  As for the material of the cap member 6, it is preferable to use a soft resin or elastomer having a visible light transmittance of 10% or less in order to suppress light leakage outside the light guide rod 1.

  Further, in the present invention, regardless of the presence of the sealing plug 4, packing member 5, cap member 6, as the waterproof joint structure of the light emitting device, a plurality of peripheral surface light emitting type light guide rods 1, 1; LED light sources 2 and 2 arranged close to the end face of the rod 1; at least two or more different surfaces are provided with recesses 31 and 31, and the LED light sources 2 and 2 are fixed in these recesses 31 and 31. It is also possible to adopt a configuration including the joint member 3 and the heat shrinkable tube 7 that integrally covers the outer peripheral surface of the joint member 3 and the outer peripheral surface of the light guide rod 1.

  In the present invention, a light-transmitting sealing plug is installed without gaps in front of the LED light source fixed in the concave portion of the joint member, so that water droplets and moisture can be blocked by the sealing plug. Therefore, it is possible to prevent a failure due to water wetting of the LED light source. In addition, since the transparent sealing plug transmits the light emitted from the LED light source to the end face of the light guide bar, the light emission performance of the light guide bar can be prevented from being deteriorated.

  On the other hand, in the present invention, it is also possible to adopt a structure in which a ring-shaped packing member is disposed in the concave portion of the joint member as a waterproof joint structure. In this case, the outer peripheral surface of the light guide rod inserted into the joint member By filling a gap between the inner wall of the recess and the inner wall with a packing member, it is possible to block the intrusion of water droplets and moisture, and thus it is possible to prevent a failure due to water wetting of the LED light source, similar to the sealing plug.

  On the other hand, in the present invention, it is also possible to employ a structure in which the cap member is covered with the recess opening of the joint member as a waterproof joint structure. In this case, the light guide rod is not formed in the insertion hole of the cap member. By inserting, it is possible to block water droplets and moisture from entering the recess. Therefore, as with the above-described sealing plug, it is possible to prevent a failure due to wetness of the LED light source.

  In the present invention, it is also possible to adopt a structure in which the joint member and the light guide rod are integrally covered with the heat shrinkable tube as the waterproof joint structure, in which case, the gap between the cap member and the joint member with the heat shrinkable tube, Alternatively, since the gap between the cap member and the light guide rod or the gap between the joint member and the cap member can be covered, the intrusion of water droplets and moisture into the recess can be blocked to prevent the LED light source from being damaged due to water.

  Therefore, in this invention, the waterproof measure of a light-emitting fixture can be performed by employ | adopting the said waterproof joint structure individually or in combination of two or more. Further, when assembling the light emitting device, except for the structure using the heat shrinkable tube, basically, the light guide rod is simply inserted into the concave portion of the joint member, so that the assembling work can be quickly performed on site.

It is a front view showing the waterproof joint structure of the light-emitting device in Example 1 of this invention. It is sectional drawing showing the waterproof joint structure of the light-emitting device in Example 1 of this invention. It is a front view showing the example of a change of the joint member in Example 1 of this invention. It is sectional drawing showing the example of a change of the sealing stopper in Example 1 of this invention. It is sectional drawing showing the waterproof joint structure of the light-emitting device in Example 2 of this invention. It is sectional drawing showing the example of a change of the waterproof joint structure of the light-emitting device in Example 2 of this invention.

“Example 1”
First, Example 1 of the present invention will be described below with reference to FIGS. In the figure, what is indicated by reference numeral 1 is a light guide rod, and what is indicated by reference numeral 2 is an LED light source. What is indicated by reference numeral 3 is a joint member, and what is indicated by reference numeral 4 is a sealing plug. What is indicated by reference numeral 5 is a packing member, and what is indicated by reference numeral 6 is a cap member.

"Waterproof joint structure for light emitting devices"
[1] Basic Configuration of Joint Portion First, in the present embodiment, as shown in FIGS. 1 and 2, a plurality of peripheral surface light emitting type light guide rods 1 and 1, and these light guide rods 1 and 1 are provided. The LED light sources 2 and 2 arranged close to the end surface and a plurality of concave portions 31 and 31 into which the light guide rods 1 and 1 are inserted are provided on different surfaces, and the LED light sources 2 are respectively provided in the concave portions 31 and 31. A joint part of the light emitting device is constituted by the joint member 3 to which 2 is fixed, and the plurality of light guide bars 1, 1 are connected in the length direction via the joint part.

[2] Waterproof structure of the joint portion Also, in the concave portion 31 of the joint member 3, there is no light between the LED light source 2 and the end face of the light guide rod 1 as shown in FIGS. A permeable sealing plug 4 is mounted without any gaps, and the sealing plug 4 blocks intrusion of water droplets and moisture so that the LED light sources 2 and 2 in the recess 31 do not get wet. Further, by using a light transmissive material for the sealing plug 4, light is incident on the light guide rod 1 from the LED light source 2 without any problem.

  Further, in this embodiment, as shown in FIGS. 2A and 2B, a ring-shaped packing member 5 is attached in the concave portion 31 of the joint member 3, and the packing member 5 is inserted into the concave portion 31. The light guide rod 1 is compressed between the outer peripheral surface and the inner wall surface of the recess 31. As a result, like the sealing plug 4, the packing member 5 can block water and moisture from entering, so that the waterproof effect in the recess 31 can be enhanced.

  Furthermore, in this embodiment, as shown in FIGS. 1 and 2 (a) (b), a cap member 6 having a shape capable of covering the outer peripheral surface of the joint member 3 is attached to the joint member 3, An insertion hole 61 for inserting the light guide rod 1 is provided in a portion covering the opening of the recess 31 of the cap member 6. As a result, if the light guide rod 1 is inserted into the insertion hole 61 of the cap member 6 without a gap, the cap member 6 can block intrusion of water droplets, moisture and the like as in the case of the sealing plug 4. The waterproof effect can be enhanced.

[3] About the light guide rod Next, each component of the joint part of the light emitting device will be described. First, with respect to the light guide rod 1, in this embodiment, a rod-like extruded product including a core layer made of acrylic resin having a predetermined refractive index and a clad layer made of fluorine resin is used. As long as it has peripheral light emitting properties, those formed from other resin materials and inorganic materials, and those formed by other manufacturing methods can be used. Further, the cross-sectional shape of the light guide rod 1 is not particularly limited, and includes a plate shape having a large aspect ratio.

[4] LED Light Source Regarding the LED light source 2, a compact chip type is used in this embodiment, but a cannonball type can also be used. In addition, the LED light source 2 can be not only a single color light emitting type but also a multiple color light emitting type, and a plurality of LED light sources 2 can be arranged in the recess 31 of the joint member 3.

[5] Regarding the joint member In addition, as for the joint member 3, in this embodiment, as shown in FIG. 1, the two opposing surfaces are provided with the concave portions 31 and 31, but at least two different surfaces are used. If the recesses 31 and 31 are formed, for example, a shape having three or more recesses 31 and 31 as shown in FIG. 3 or a shape having the recesses 31 and 31 on two orthogonal surfaces should be adopted. You can also. Further, in this embodiment, a fixing surface for attaching the LED light source 2 is formed in the concave portion 21 of the joint member 3, and a wiring space for connecting a lead wire to the LED light source 2 is provided on the back side (see FIG. Not shown).

  Furthermore, regarding the material of the joint member 3, in this embodiment, a polycarbonate resin having a thermal conductivity of 1.5 W / m · K or more is used in order to ensure sufficient heat dissipation. Other resin materials, metal materials such as aluminum and copper, ceramic materials, or composite materials thereof can be used as long as the materials have excellent properties.

[6] Regarding the sealing plug In the above-described sealing plug 4, an acrylic thermoplastic elastomer excellent in light transmission is used as a material in this embodiment, but a soft resin (for example, a transparent and flexible material) , Soft PVC, etc.) and other elastomers (for example, thermosetting silicone rubber and synthetic rubber) can also be used.

  In this embodiment, the incident efficiency of light from the LED light source 2 to the light guide rod 1 is increased by making the sealing plug 4 into a concave lens shape (divergent lens). In addition, as a concave lens shape, the shape of a biconcave lens other than a plano-concave lens and a concave meniscus lens can also be employ | adopted. When the sealing plug 4 does not require an optical function other than translucency, a flat plate shape as shown in FIG. 4 can be adopted.

[7] Packing member As for the packing member 5, silicone rubber is used as a material in the present embodiment. However, a soft resin (for example, soft PVC) or other elastomer (such as soft PVC) is used as long as it is a flexible material. For example, a thermoplastic elastomer or a synthetic rubber can be used. In particular, it is preferable to use a material having a visible light transmittance of 10% or less as a material of the packing member 5 in order to suppress light leakage to the outside of the light guide rod 1.

  In addition, regarding the attachment of the packing member 5 into the recess 31 of the joint member 3, there is no particular problem even if it is press-fitted, but in order to prevent the displacement of the packing member 5 in the recess 31, it is fixed with an adhesive or the like. Also good. As for the shape of the packing member 5, the thickness and the cross-sectional shape are not particularly limited as long as the ring shape does not cause a gap between the light guide rod 1 and the inner wall of the recess 31.

[8] Cap member As for the cap member 6, in the present embodiment, fluorine-based rubber is used as the material. However, if the material is flexible to some extent, a soft resin (for example, soft PVC) or other elastomer is used. (For example, a thermoplastic elastomer, a thermosetting silicone rubber, etc.) can also be used. In particular, it is preferable to use a material having a thermal conductivity of 1.5 W / m · K or more as the material of the cap member 6 in order to ensure heat dissipation. In addition, it is preferable to use a material having a visible light transmittance of 10% or less as a material of the cap member 6 in order to suppress leakage of light to the outside of the light guide rod 1.

“Example 2”
"Waterproof joint structure for light emitting devices"
[1] Waterproof structure of joint portion Next, a second embodiment of the present invention will be described with reference to FIG. In the figure, what is indicated by reference numeral 7 is a heat shrinkable tube. In Example 2, the outer peripheral surface of the joint member 3, the outer peripheral surface of the cap member 6, and the outer peripheral surface of the light guide rod 1 are integrally covered with the heat shrinkable tube 7 to form a joint portion of the light emitting device. Yes. Other configurations are the same as those in the first embodiment.

  With the above configuration, it is possible to prevent water droplets and moisture from entering the concave portion 31 of the joint member 3, so that the LED light source 1 can be prevented from getting wet. Moreover, the light guide rod 1 and the light source module can be protected from damage by being covered with the heat shrinkable tube 7. Moreover, when using a fluorine-type resin for the heat-shrinkable tube 7, a weather resistance can also be improved.

[2] Heat-shrinkable tube On the other hand, the heat-shrinkable tube 7 covers the entire light guide rod 1 using a light-transmitting fluororesin (PFA) as a material in this embodiment. Other resin materials such as polyolefin resin can be used as long as the material has heat shrinkability. As for the range covered with the heat-shrinkable tube 7, it is sufficient that at least the boundary part between the joint member 3 and the cap member 6 and the boundary part between the cap member 6 and the light guide rod 1 are covered. In the case where the heat shrinkable tube 7 is coated, a material having no light transmission property may be used for the heat shrinkable tube 7.

"Other structures using heat-shrinkable tubes"
The present invention is generally configured as described above. However, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the description of “Claims”. When the waterproof structure including the heat shrinkable tube 7 is adopted, as shown in FIG. 6, the gap between the light guide rod 1 and the opening of the concave portion 31 of the joint member 3 is formed in the heat shrinkable tube without using the cap member. It is also possible to prevent water droplets and moisture from entering by covering with 7.

  The use of the light emitting device having the waterproof joint structure according to the present invention is particularly suitable for use in a light decoration device, a warning device, a display device and the like used outdoors.

DESCRIPTION OF SYMBOLS 1 Light guide rod 2 LED light source 3 Joint member
31 Concave part 4 Seal plug 5 Packing member 6 Cap member
61 Insertion hole 7 Heat shrinkable tube

Claims (11)

A light-emitting fixture waterproof joint structure formed by connecting a plurality of light guide bars (1), (1), and a plurality of peripheral surface light-emitting type light guide bars (1), (1); LED light sources (2) and (2) arranged close to the end surface of (1); at least two or more different surfaces are provided with recesses (31) and (31), and these recesses (31) and (31) A joint member (3) in which the LED light sources (2) and (2) are fixed; and a recess (31) of the joint member (3) which is mounted without a gap and in the recess (31). A light-transmitting sealing plug (4) disposed between the LED light source (2) and the light guide rod (1).
A waterproof joint structure for a light-emitting device, wherein a transparent soft resin or elastomer is used as a material for the sealing plug (4).   The waterproof joint structure for a light-emitting device according to claim 1, wherein the sealing plug (4) has a concave lens shape.   A ring-shaped packing that is compressed between the outer peripheral surface of the light guide rod (1) inserted into the recess (31) and the inner wall surface of the recess (31) in the recess (31) of the joint member (3). The waterproof joint structure for a light-emitting device according to claim 1 or 2, wherein a member (5) is disposed.   Insertion hole into which the light guide rod (1) is inserted into a portion that covers the outer peripheral surface of the joint member (3) and covers the opening of the recess (31) of the joint member (3) A cap member (6) provided with (61) is attached, and a soft resin or elastomer having a thermal conductivity of 1.5 W / m · K or more is used as the material of the cap member (6). The waterproof joint structure for a light-emitting device according to any one of claims 1 to 3.   The heat shrinkable tube (7) integrally covers the outer peripheral surface of the joint member (3) and the outer peripheral surface of the light guide rod (1). The waterproof joint structure of the light-emitting device as described.   A light-emitting fixture waterproof joint structure formed by connecting a plurality of light guide bars (1), (1), and a plurality of peripheral surface light-emitting type light guide bars (1), (1); LED light sources (2) and (2) arranged close to the end surface of (1); at least two or more different surfaces are provided with recesses (31) and (31), and these recesses (31) and (31) A joint member (3) in which the LED light sources (2) and (2) are fixed; a guide member disposed in the recess (31) of the joint member (3) and inserted into the recess (31). A waterproof joint structure for a light-emitting device, comprising a ring-shaped packing member (5) that is compressed between the light rod (1) and the inner wall surface of the recess (31).   The waterproof joint structure for a light-emitting device according to claim 6, wherein a soft resin or elastomer having a visible light transmittance of 10% or less is used as a material of the packing member (5). A light-emitting fixture waterproof joint structure formed by connecting a plurality of light guide bars (1), (1), and a plurality of peripheral surface light-emitting type light guide bars (1), (1); LED light sources (2) and (2) arranged close to the end surface of (1); at least two or more different surfaces are provided with recesses (31) and (31), and these recesses (31) and (31) A joint member (3) in which the LED light sources (2) and (2) are fixed; a shape capable of covering the outer peripheral surface of the joint member (3); and a recess in the joint member (3) (31) A cap member (6) provided with an insertion hole (61) into which the light guide rod (1) is inserted in a portion covering the opening,
A waterproof joint structure for a light emitting device, wherein a soft resin or elastomer having a thermal conductivity of 1.5 W / m · K or more is used as a material of the cap member (6).   The waterproof joint structure for a light-emitting device according to claim 8, wherein a resin material having a thermal conductivity of 1.5 W / m · K or more is used as a material of the joint member (3).   The waterproof joint structure for a light-emitting device according to claim 8 or 9, wherein a soft resin or elastomer having a visible light transmittance of 10% or less is used as a material of the cap member (6).   A light-emitting fixture waterproof joint structure formed by connecting a plurality of light guide bars (1), (1), and a plurality of peripheral surface light-emitting type light guide bars (1), (1); LED light sources (2) and (2) arranged close to the end surface of (1); at least two or more different surfaces are provided with recesses (31) and (31), and these recesses (31) and (31) A joint member (3) in which the LED light sources (2) and (2) are fixed; and heat shrinkage that integrally covers the outer peripheral surface of the joint member (3) and the outer peripheral surface of the light guide rod (1). A waterproof joint structure for a light-emitting device, characterized by comprising a tube (7).