JP2011204845A - Light emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emitting device using a solid light emitting element which is provided with a waterproofing function etc., with simple constitution.SOLUTION: The light emitting device 10 includes: a light emitting portion 12 comprising the solid light emitting element 11; a body case 13 where the light emitting portion is arranged; a translucent cover member 14 engaged with a side face of the body case so as to cover the light emitting portion; and an elastic seal member 15 interposed between the side face of the body case and an inner surface of the translucent cover member.

Description

  The present invention relates to a light emitting device using a solid light emitting element such as a light emitting diode as a light source.

  In recent years, light-emitting devices using solid-state light-emitting elements, particularly light-emitting diodes, have been used as light sources for various lighting fixtures such as bulb-type LED lamps, downlights, spotlights, etc. In addition, mobile phones, backlights of various information terminals, and advertisements for billboards indoors and outdoors are being developed in various fields. For example, Patent Document 1 discloses a signboard illumination device using a light emitting diode as a light source.

JP 2009-036953 A

  On the other hand, in the signage lighting apparatus used indoors and outdoors, it is required to have functions such as waterproofing and dustproofing in order to protect the light emitting part composed of the light emitting diodes from rainwater and dust. In the above-mentioned Patent Document 1 (see paragraph [0025]), the substrate on which the optical lens and the light emitting diode are mounted is resin-molded to provide a function such as waterproofing. However, since the resin mold for providing this type of waterproofing function seals the light emitting diode so as to be completely shielded from the outside air, generally a silicone resin having fluidity is used as the light emitting diode. In the manufacturing process, a resin filling operation and steps such as curing and drying after the filling are required in the manufacturing process, and there is a problem that the working efficiency is lowered and the cost is increased. For this reason, in this type of light emitting device that requires functions such as waterproofing, it is an important issue how to provide functions such as waterproofing and dustproofing without cost.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a light-emitting device using a solid-state light-emitting element that can have a function such as waterproofing with a simple configuration.

  The invention of the light-emitting device according to claim 1 is a light-emitting unit comprising a solid-state light-emitting element; a main body case in which the light-emitting unit is disposed; and a translucent cover member fitted to a side surface of the main body case so as to cover the light-emitting unit And an elastic sealing member interposed between the side surface of the main body case and the inner side surface of the translucent cover member. According to the present invention, the translucent cover member fitted to the side surface of the main body case so as to cover the light emitting portion, and the elastic sealing member interposed between the side surface of the main body case and the inner side surface of the translucent cover member Thus, in a light emitting device using a solid light emitting element, it is possible to provide a function such as waterproofing with a simple configuration.

  In the present invention, the light emitting device is preferably applied to a signboard illumination device installed indoors and outdoors, particularly outdoors. Various lighting fixtures for homes such as downlights embedded in, etc., various lighting fixtures for facilities and business such as stores and offices, and various lighting devices and display devices such as guide lights, emergency lights, and indicator lights Furthermore, the present invention may be applied to a backlight light source in a large-sized thin television, a liquid crystal display, various information terminals, and the like. Since the light-emitting device is used in the various and various lighting devices described above, it is usually used by connecting a plurality of light-emitting devices. However, the light-emitting device may be composed of one light-emitting device.

  The solid light emitting element is allowed to be composed of a solid light emitting element such as a light emitting diode, a semiconductor laser, or an organic EL. The light-emitting unit composed of these solid-state light-emitting elements is configured by mounting the solid-state light-emitting element on a substrate. For example, a light-emitting diode is mounted on the substrate by using a SMD (Surface Mount Device) type to configure the light-emitting unit. It is preferable to use a COB (Chip on Board) technology, however, a large number of light emitting diodes are mounted in a regular or regular order, such as a matrix, staggered, or radial, in a planar form to emit light. The part may be configured. The solid light-emitting element may be composed of one or a plurality, and the necessary number is selected according to the application.

  The light emitting part has a substrate for disposing a solid light emitting element, and the substrate is preferably composed of a synthetic resin such as an epoxy resin or a glass epoxy material from the viewpoint of electrical insulation, but from the viewpoint of thermal conductivity Further, it may be made of a metal having good thermal conductivity such as ceramics, aluminum, or copper. In addition, the shape is preferably a circular substrate in order to form a circular light-emitting portion, but it may be a polygonal shape such as a triangle, hexagon, or octagon even if it is rectangular such as a square or rectangle. Further, it may have an elliptical shape or the like, and all shapes for obtaining a desired light distribution characteristic are allowed.

  The main body case in which the light emitting unit is disposed has an electrical insulating property, for example, it is advantageous in terms of cost to be composed of a synthetic resin such as PBT (polybutylene terephthalate). In consideration of the above, it may be composed of a metal such as aluminum having good thermal conductivity, or may be composed of a synthetic resin such as a high thermal conductivity resin if the cost is appropriate.

  The translucent cover member is preferably fitted to cover the entire side surface of the main body case so as to cover the light emitting part from the viewpoint of effectively performing airtightness by the seal member. Instead, it may be fitted so as to cover a part of the side surface. In short, fitting means with all side surfaces of the main body case capable of ensuring airtightness by the seal member is allowed.

  Further, an elastic seal member is interposed between the side surface of the main body case and the inner side surface of the translucent cover member. That is, since the uniform pressure is applied by simply fitting the translucent cover member from the upper side of the main body case, the sealing performance can be easily improved.

  For example, when the translucent cover member is applied to an illumination device for a signboard, it has a light control unit such as a lens body or a reflector that can control light distribution in order to uniformly irradiate a wide range of advertisement contents. However, a translucent cover member that does not have a light control unit may be used here. In addition, the translucent cover member is formed, for example, in a cylindrical shape with a bottom made of transparent acrylic resin, and the entire translucent cover member includes a portion that covers the light emitting portion and a portion that is fitted to the side surface of the main body case. Although it is advantageous in terms of cost to be configured with light, a part, for example, a part fitted to the side surface of the main body case may be configured to be opaque, and at least the light emitting part It suffices if the portion covering the surface has translucency. In addition, it is preferable that the translucent cover member is made of a transparent material such as a synthetic resin or glass from the viewpoint of reducing light loss, but even if it is made translucent such as milky white to diffuse light, May be composed of a light-transmitting body made of various colors such as coloring depending on the application.

  The seal member is interposed between the side surface of the main body case and the cover member, and is permitted to be formed of a synthetic resin such as elastic silicone rubber, or a packing of natural rubber or synthetic rubber. In order to improve the airtightness, a band-like shape having a predetermined width and a ring-like shape along the side surface of the main body case is suitable, but it is interposed in a part of the side surface of the main body case. It may be an O-ring or the like. In addition, the airtightness in the present invention is preferably configured so as to completely block the intrusion of outside air. However, for example, a small ventilation hole for heat dissipation may be formed, such as dust or rainwater. As long as the airtightness is substantially maintained to such an extent that does not enter.

  According to a second aspect of the present invention, in the light emitting device according to the first aspect, the seal member has an insertion portion for inserting the introduced electric wire in an airtight manner. According to the present invention, the sealing member has an insertion portion for inserting the introduced electric wire in an airtight manner, thereby providing a more reliable function such as waterproofing with a simple configuration in the light emitting device using the solid light emitting element. It becomes possible. In the present invention, the insertion part for inserting the electric wire in an airtight manner is preferably formed integrally with the seal member, but each is formed separately by resin molding or the like, and mechanical engagement means or adhesive means It may be integrated by, for example.

  According to the first aspect of the present invention, the translucent cover member that is fitted to the side surface of the main body case so as to cover the light emitting portion, and the interposition between the side surface of the main body case and the inner side surface of the translucent cover member. With the elastic sealing member, a light-emitting device using a solid light-emitting element, which can have a function such as waterproofing with a simple configuration, can be provided.

  According to the second aspect of the present invention, the sealing member has the insertion portion that allows the introduced electric wire to be inserted in an airtight manner, so that the light emitting device using the solid light emitting element has a simple structure and more reliable waterproofing. Thus, it is possible to provide a light-emitting device capable of having the above functions.

The perspective view which decomposes | disassembles and shows the light-emitting device which is embodiment of this invention. The light emitting device is also shown, (a) is a cross-sectional view showing a part cut, (b) is a cross-sectional view of the main part taken along the line bb in FIG. The figure which similarly shows the dimensional relationship of each component in a light-emitting device. The lighting device for signboards using the light emitting device is also shown, (a) is a front view showing a part cut away, (b) is a front view showing a state in which 16 light emitting devices are connected, and (c) is 4 in the same manner. The front view which shows the state connected individually, (d) is a front view which shows one light-emitting device. FIG. 6 is a cross-sectional view illustrating a modification of the light-emitting device with a part thereof cut;

  Hereinafter, embodiments of the light emitting device according to the present invention will be described.

  The light-emitting device of this embodiment is a small light-emitting device that is connected to a lighting device for signboards. As shown in FIGS. 1 to 3, the light-emitting device 10 includes a solid-state light-emitting element 11. A light emitting part 12 comprising: a light emitting part 12; a main body case 13 in which the light emitting part is disposed; a translucent cover member 14 covering the light emitting part; It comprises an electric wire 16 for supplying power to the light emitting element.

  The solid-state light emitting element 11 is composed of a light emitting diode (hereinafter referred to as “LED”) in this embodiment, and the LED 11 includes six LED chips having the same performance, and in this embodiment, a high-luminance and high-output blue LED chip. It is composed of a high-intensity, high-power SMD type LED that emits white light by a yellow phosphor excited by. The SMD type LED 11 transmits blue light emitted from a blue LED chip, excites a yellow phosphor with blue light to convert it into yellow light, and the transmitted blue light and yellow light are mixed to produce white light. Of light is emitted.

  LED11 comprised above is mounted in the board | substrate 12a, and comprises the light emission part 12. As shown in FIG. The substrate 12a is made of a glass epoxy material having a substantially disk shape, and a wiring pattern is formed on one side (front side), and the SMD type LED 11 is mounted on the center thereof to constitute the light emitting unit 12. The In the drawing, reference numeral 12a1 denotes a notch formed on the outer periphery of the substrate 12a so as to face the diameter direction, and is used for positioning when the substrate 12a is supported on the main body case 13.

  The main body case 13 is a member for disposing the light emitting portion 12 and is made of a heat-resistant and electrically insulating member, in this embodiment, a synthetic resin made of PBT (polybutylene terephthalate). The main body case 13 includes a case body 13a having a substantially cylindrical shape with a bottom, a fitting receiving portion 13b formed on a cylindrical outer peripheral side surface of the case body, a diametrically opposed side surface of the fitting receiving portion, and a cylindrical shaft A pair of introduction portions 13c that are provided along the direction (vertical direction) and that are formed of bowl-shaped grooves for introducing and guiding an electric wire, and a packing receiving portion 13d that is formed stepwise on the outer periphery excluding the introduction portion. A substrate support portion 13e formed of a circular flat surface formed at the upper end portion of the bottomed cylinder, an electric wire housing portion 13f formed of an annular recess formed around the substrate support portion, and a pair of formed at the bottom portion of the cylinder It consists of a mounting piece 13g, and these members are integrally formed by resin molding.

  In the above, the pair of introduction portions 13c are formed in a substantially vertical direction with respect to the flat horizontal surface of the substrate support portion 13e, thereby reducing the lateral extension of the main body case 13 and reducing the size. ing. At the same time, as will be described later, a constant force can be efficiently applied to the sealing member of the electric wire introduction portion. Moreover, the fastening parts (screw etc.) of a main body case and a cover member etc. can be reduced. The pair of attachment pieces 13g are members for attaching the main body case 13 to, for example, an attachment panel of a sign lighting device, and are integrally formed in an L shape so as to protrude outward from the bottom surface of the case body 13a. And is configured such that a gap K is formed between the panel and the panel when mounted on the mounting panel. The interval K communicates with a space portion formed on the back side of the substrate support portion 13e. Thereby, the back side of the board | substrate support part 13e is cooled by external air, and the heat which generate | occur | produces from LED11 is thermally radiated.

  In the figure, 13h is a support piece for fixing a translucent cover member 14 to be described later, 13j is a fixing piece for fixing the band B for stopping the electric wire 16, and 13k is an outer peripheral edge of one end of the case body 13a. The notch 12a1 of the substrate 12a is fitted into the positioning projection piece formed so as to face the diameter direction and protrude upward, thereby positioning the substrate 12a. These members are also integrally formed with the case body 13a by resin molding. The parts constituting the main body case 13 are simplified in configuration so that they can be integrally formed of resin, improving workability during assembly, and suppressing an increase in cost.

  In the present embodiment, the translucent cover member 14 is integrally formed by resin molding into a cylindrical shape having one end closed with a transparent acrylic resin and having an opening 14a at the other end (hereinafter referred to as the present invention). In the embodiment, the translucent cover member is simply referred to as “cover member”). A lens body 14b for controlling the light distribution of the light emitted from the light emitting unit 12 is integrally formed at one end of the closed cylinder. Further, the inner side surface of the cylinder is fitted into a fitting receiving portion 13 b provided on the side surface of the main body case 13. 3, the inner diameter dimension d1 of the cylindrical inner surface of the cover member 14 is equal to or larger than the outer diameter d2 (FIG. 1) of the side surface outer peripheral portion of the main body case 13, in other words, the fitting receiving portion 13b. d1 ≧ d2), and a gap S is formed between the fitting receiving portion 13b of the main body case 13 and the inner surface of the cover member 14.

  The lens body 14b for controlling the light distribution of the light emitted from the light emitting unit 12 is optically designed so that the light distribution beam angle is about 80 ° so as to expand the light beam to the surroundings. When used, the light is uniformly irradiated over a wide range. In addition, 14c in the figure is a support piece provided corresponding to the support piece 13h of the main body case 13, and is a member for fixing the cover member 14 with a screw. In addition, four pressing portions 14 d that protrude inward are formed integrally and at substantially equal intervals in the radial direction on the upper inner surface of the cover member 14. The pressing portion 14 d is a member for supporting the substrate 12 a of the light emitting unit 12 by pressing it against the substrate support portion 13 e of the main body case 13 from above. The lens body 14b, the support piece 13h, and the holding portion 14d described above are simplified in configuration so that they can be integrally formed with resin, and, like the main body case 13, the workability during assembly is improved and the cost is reduced. The rise is suppressed.

  The sealing member 15 is interposed in a gap S formed between the side surface of the main body case 13 and the inner side surface of the cover member 14, thereby blocking the inside of the cover member 14, that is, the light emitting unit 12 from the outside air. In this embodiment, it is composed of a silicone rubber having elasticity, a band shape having a predetermined width, and a ring-shaped packing (hereinafter, in this embodiment, the seal member is referred to as “packing”. "). The packing 15 integrally forms a pair of insertion portions 15a for inserting the wires 16 in an airtight manner, corresponding to the pair of introduction portions 13c for introducing the wires formed in the body case 13 in a substantially vertical direction. The insertion portion 15a is integrally formed on the inner peripheral surface of the ring of the packing 15 having a ring shape so as to have an insertion hole 15b that is opposed to the diameter direction and penetrates therethrough. As shown in FIG. 3, the inner diameter d3 of the insertion hole 15b is formed to be equal to or smaller than the outer diameter dimension d4 of the electric wire 16 (d3 ≦ d4), and the elasticity of the packing 15 is used to force the electric wire 16 into Simultaneously with the expansion of the insertion hole 15b, the inner peripheral surface of the insertion hole 15b is brought into close contact with the outer peripheral surface of the electric wire 16 by a repulsive force due to elasticity, and airtightness between the electric wire 16 and the insertion hole 15b is ensured. In the drawing, reference numeral 15c denotes a convex strip formed integrally over the outer peripheral surface and inner peripheral surface of the ring-shaped packing 15 and the outer peripheral surface of the insertion portion 15a formed integrally with the inner peripheral surface. The convex part which consists of three rings is formed in the up-down direction with a predetermined space | interval. The insertion portion 15a, the insertion hole 15b, and the ridge portion 15c are simplified in configuration so that they can be integrally formed by molding silicone rubber, and in the same manner as the main body case 13 and the cover member 14, The workability is improved, and the increase in cost is suppressed.

  The inner diameter d5 of the packing 15 is formed to be equal to or smaller than the outer diameter d2 of the side surface outer peripheral portion of the main body case 13, that is, the fitting receiving portion 13b (d5 ≦ d2). Further, the outer diameter d7 of the packing 15 is equal to or larger than the inner diameter d1 of the cover member 14 (d7 ≧ d1), in other words, the packing thickness dimension t1 is formed to be equal to or larger than the interval dimension t2 of the gap S (t1 ≧ t2). To do. Further, the outer diameter d9 of the insertion portion 15a is formed to be equal to or larger than the inner diameter d10 of the groove of the introduction portion 13c for introducing the electric wire (d9 ≧ d10).

  The electric wire 16 is an electric wire for supplying power to the LED 11 of the light emitting unit 12 from a separate power supply unit. The electric wire 16 is composed of a two-core covered electric wire, one on the + side and one on the negative side. The covered portion of the electric wire is inserted into the groove 13c, the tip portion thereof is pushed into the insertion hole 15b of the packing 15 as described above, and the tip having the peeled off portion is connected to the input terminal portion of the substrate 12a by soldering or the like. Further, as the electric wire, the electric wire 17 for feeding when a plurality of the light emitting devices 10 are connected and used is used, and the electric wire for feeding is also opposed to the introducing portion 13c into which the electric wire for feeding is inserted in the same manner as described above. Is inserted into the other introduction portion 13c provided, and further pushed into the other insertion hole 15b of the packing 15, and the tip is connected to a feed terminal provided on the substrate 12a. As shown in FIG. 2, a power supply wire 16 and a feed wire 17 are drawn from the bottom of the main body case 13 in the diameter direction.

  Next, an assembly procedure of the light emitting device 10 configured as described above will be described. First, the tip portions of the power supply wire 16 and the feed wire 17 are pushed into the insertion portion 15a of the packing 15, and the peeled tip is pulled out from the insertion hole 15b, and soldered to the input terminal and the feed terminal of the substrate 12a. Connecting. At this time, the surplus electric wires are accommodated in the recesses of the electric wire accommodating portion 13 f formed in the main body case 13. Thereby, since the inner diameter d3 of the insertion hole 15b is formed to be equal to or smaller than the outer diameter dimension d4 of the electric wire 16 (d3 ≦ d4), the inner peripheral surface of the insertion hole 15b is in close contact with the outer peripheral surface of the electric wire 16, and the electric wire 16 , 17 and the packing 15 are secured. Next, the electric wires 16 and 17 drawn to the left and right of the main body case 13 are fixed to the fixing piece 13j by the band B with screws.

  Next, the integrated substrate 12 a, packing 15 and electric wires 16, 17 are inserted into the main body case 13. That is, while the packing insertion portion 15a through which the electric wires 16 and 17 are inserted is fitted into the groove of the introduction portion 13c formed in the side surface of the main body case 13 in a substantially vertical direction, the packing 15 is slightly opened against the elasticity while being slightly opened. 13 is fitted into the fitting receiving portion 13b on the outer periphery of the side surface, and the lower end portion of the packing 15 is brought into contact with the packing receiving portion 13d. Accordingly, the inner diameter d5 of the packing 15 is formed to be smaller than the outer diameter d2 of the fitting receiving portion 13b of the main body case 13 (d5 ≦ d2), and the lower end portion of the packing 15 is the packing receiving portion of the main body case 13. Since it is in contact with 13d, the inner peripheral surface of the packing 15 is in close contact with the fitting receiving portion 13b of the main body case 13, and the airtightness between the packing 15 and the main body case 13 is ensured. At this time, the packing 15 has a band shape, a plurality of protrusions 15c are formed on the inner peripheral surface, and the packing receiving portion 13b of the main body case 13, that is, the side surface of the main body case having a large area is closely attached. Therefore, more effective airtightness can be secured.

  Further, the outer diameter d9 of the insertion portion 15a is formed to be equal to or larger than the inner diameter d10 of the groove of the introduction portion 13c for introducing the electric wire (d9 ≧ d10), and the protruding portion 15c extends over the outer peripheral surface of the insertion portion 15a. Since it is formed, the outer periphery of the insertion portion 15a is in close contact with the inner surface of the vertical introduction portion 13c, and the air tightness in the introduction portion 13c of the electric wire is ensured by the insertion portion 15a of the packing 15 (FIG. 2 (b)). .

  Next, the substrate 12 a is placed on the substrate support portion 13 e of the main body case 13. At this time, the notch 12a1 of the substrate 12a is fitted to the protruding piece 13k of the main body case 13 for positioning. Next, as described above, with the substrate 12a, the packing 15, and the electric wires 16 and 17 supported by the main body case 13, the cover member 14 is covered with the substrate 12a on which the LEDs 11 are mounted, that is, the light emitting unit 12. In this way, the outer periphery of the packing 15 is pushed into and fitted into the outer periphery of the packing 15 while resisting the elasticity of the packing. And the support piece 14c of the cover member 14 and the support piece 13h of the main body case 13 are match | combined, and it fixes with a screw | thread.

  Thereby, the outer diameter d7 of the packing 15 is formed to be equal to or larger than the inner diameter d1 of the cover member 14 (d7 ≧ d1), so that the outer peripheral surface of the packing 15 and the inner surface of the cover member 14 are in close contact with each other and the gap S is closed. 14 and the main body case 13 are secured. At this time, the packing 15 has a band shape, a plurality of ridges 15c are formed on the outer peripheral surface and the inner peripheral surface, and the side surface of the main body case having a large area and the inner side surface having a large area of the cover member. Since it can be made to adhere, more effective airtightness can be secured. At the same time, by inserting the cover member 14 from the upper side of the main body case 13, a force in the direction of the arrow a shown in FIG. 2B is applied to the insertion portion 15a of the packing 15, and the insertion portion 15a, that is, the insertion portion. The plurality of ridges 15c formed on the outer peripheral surface of the wire can be effectively pressed against the inner surface of the wire introduction portion 13c formed in the vertical direction with a constant force and can be effectively sealed. Further, since the cylindrical cover member 14 is simply fitted from the upper side of the cylindrical main body case 13 and uniform pressure is applied from the periphery to these sealed portions, the sealing performance can be easily improved.

  Further, the cover member 14 is simply fitted from the upper side of the main body case 13, and at the same time, the four pressing portions 14d formed on the inner side surface of the cover member 14 cause the four places around the substrate 12a of the light emitting unit 12 to be in the main body case. It is pressed and fixed from above to the 13 substrate support portions 13e. At this time, if necessary, the substrate 11 was fixed in close contact with a substrate support portion 13e having a flat surface via a sheet of silicone resin or epoxy resin having good thermal conductivity, an adhesive, or the like, and generated in the LED 11. Heat is effectively transferred to the back side of the substrate support 13e.

  This completes the assembly work. In this assembling operation, there is no need for a resin filling operation and steps such as curing and drying after the filling as in the prior art, so that the problem of an increase in cost can be solved without reducing the work efficiency. At the same time, each component has a simple structure that can be integrally molded with synthetic resin, the assembly work can be done with simple work, and the work efficiency can be further improved, making it suitable for mass production. Can be provided.

  As described above, the airtightness of the main body case 13, the cover member 14, and the wire insertion portion 15a is secured, and the airtightness of the light emitting portion 12 with respect to the outside air, that is, the LED 11 having functions such as waterproof and dustproof with a simple configuration is used. The light emitting device 10 is configured. Further, the light emitting device 10 of the present embodiment is configured as a small light emitting device in which the outer diameter of the cover member 14 is about 50 mm.

  The light emitting device 10 configured as described above is used as a light source of a signboard illumination device. The light emitting device 10 having the above-described configuration can be used as a light source of a newly constructed signboard illumination device, but can be replaced with, for example, a straight tube fluorescent lamp in an existing signboard illumination device. It is small. Hereinafter, a procedure for constructing a new energy-saving signboard illumination device by replacing the light emitting device of the present invention with a fluorescent lamp with respect to an existing signboard illumination device using a fluorescent lamp as a light source will be described.

  The existing signboard lighting device 20 is a so-called internal lighting type lighting device, and as shown in FIG. 4A, displays a mounting panel 21 to which a fluorescent lamp is attached and advertising characters, figures, patterns, and the like. It consists of the front panel 22 comprised with the translucent member. In the figure, reference numeral 23 denotes a separate power supply unit. In the existing signboard lighting device, the light emitting device 10 having the above-described configuration using LEDs as light sources is installed in place of fluorescent lamps in order to save energy and extend the life. A plurality of light emitting devices 10, 36 in this embodiment, are connected so as to form a line. The light emitting devices 10 that form a line are bent, parallel to the mounting panel 21, and meandered. Arrange in a matrix. This is arranged so as to be along the fluorescent lamp that has been installed as an existing instrument. At this time, the light emitting device 10 fixes the pair of attachment pieces 13g formed on the main body case 13 to the attachment panel 21 with fixing means such as screws. The light emitting device 10 can also be arranged with a higher density than that of existing fluorescent lamps.

  As described above, a new signboard illumination device using an LED as a light source can be easily configured. When this signboard lighting device is turned on, light is emitted from each light emitting device 10 with a light distribution characteristic spreading to a light distribution angle of about 80 °, so that the front panel 22 having a large area is substantially even. More effective advertisement illumination can be performed by irradiating light that is equivalent to or more equal to that of a conventional fluorescent lamp. At the same time, it is possible to provide an energy-saving signboard lighting device that reduces power consumption due to the energy-saving effect of LEDs. Further, as shown in FIGS. 4B, 4C, and 4D, the light-emitting device 10 can be used in a continuous manner, and can be applied to existing or new signboard illumination devices of various sizes. Thus, a light-emitting device with excellent versatility can be provided. At the same time, since the light-emitting devices 10 are connected in a row, the light-emitting devices 10 in a row can be easily applied to lighting devices for signboards of various sizes by simply bending the light-emitting devices 10. Can be improved.

  Even if the sign lighting device is installed outdoors, even if rainwater or dust enters the mounting panel 21, the light emitting device 10 has functions such as waterproofing and dustproofing. It is possible to provide a safe signboard lighting device having a long life without causing deterioration of the light-emitting portion 12 due to dust or dust, and without causing leakage of electricity due to deterioration of electrical insulation resistance. The pair of attachment pieces 13g are integrally formed in an L shape so as to protrude outward from the bottom surface of the case body 13a, and when attached to the attachment panel 21, a gap K is formed between the pair of attachment pieces 13g. Therefore, water droplets or the like attached to the mounting panel 21 are prevented from falling through the gap K and entering from the bottom of the light emitting device 10. In addition, the light emitting device 10 is installed on the sign by an operator at the site selecting the position according to the state of the sign. However, the light emitting device of this embodiment can be installed in any direction. However, waterproofness is not hindered. In addition, since the main body case and the like are made of synthetic resin, a safe light-emitting device that is free from the risk of electric leakage or electric shock can be provided.

  As described above, according to the present embodiment, the airtightness between the main body case 13 and the cover member 14 is ensured by the packing 15, and at the same time, the airtightness between the main body case 13 and the electric wires by the insertion portion 15 a formed in the packing 15. Therefore, it is possible to provide the light emitting device 10 having functions such as waterproofing and dustproofing of the light emitting unit 12 with respect to the outside air. In particular, since the packing 15 can be closely attached to the side surface of the main body case 13 having a large area and the inner side surface having a large area of the cover member 14, more effective airtightness can be ensured. In addition, since the airtightness is ensured by the side surface portion having a large area, the infiltration path for rainwater, dust, and the like is lengthened, and the entry of water, dust, and the like can be more effectively prevented. In particular, by fitting the cover member 14 from the upper side of the main body case 13, the cover member 14 can be efficiently pressed against the insertion portion 15 a of the packing 15 with a constant force, and the air tightness at the introduction portion of the electric wire is further ensured. can do. Further, since the cover member 14 is simply fitted from the upper side of the main body case 13 and a uniform pressure is applied to these sealed portions, the sealing performance can be easily improved.

  In addition, each component constituting functions such as waterproofing and dustproofing of the light emitting unit 12 has been simplified so that it can be integrally molded, so that workability during assembly can be improved. As in the prior art, a resin filling operation and steps such as curing and drying after filling are unnecessary, and an inexpensive light emitting device that suppresses an increase in cost can be provided. At the same time, the assembly operation can be performed with a simple operation, and a light-emitting device suitable for mass production can be provided. In particular, since the packing 15 is formed so as to have the insertion portion 15a through which the electric wire is inserted, it can be integrally formed by molding with the packing material, and the workability at the time of assembly can be further improved. In particular, in this embodiment, since the insertion portion 15a is formed integrally with the packing 15, in other words, the airtightness in the introduction portion of the electric wire is ensured with respect to the seal member that secures the airtightness between the main body case and the cover member. Since the sealing member for this purpose is integrally formed, the configuration can be further simplified. At the same time, extra parts for sealing the electric wires can be reduced, and cost reduction can be achieved by reducing the number of parts.

  Further, in the assembling work, the cover member 14 is fitted into the main body case 13, and simultaneously and automatically, the substrate 12 a of the light emitting part 12 is held by the holding part 14 d formed on the inner surface of the cover member 14. Since the case 13 is pressed and fixed to the substrate support portion 13e of the case 13, workability can be further improved. At the same time, an extra part for fixing is unnecessary, and the cost can be further reduced.

  In addition, since the light-emitting device of this embodiment is configured as a small and energy-saving light-emitting device using LEDs, it can not only provide a new energy-saving light-emitting device, but also can replace the light source of the existing lighting device. Therefore, the existing lighting device can be easily changed to an energy-saving lighting device. In particular, when applied to a signboard lighting device, it is possible to irradiate a light emitting panel having a large area substantially evenly, and to perform more effective advertising illumination. In addition, any number of light emitting devices can be connected and used, and a light emitting device having excellent versatility and excellent workability can be provided.

  As described above, in this embodiment, in the case of a small illuminating device installed indoors or the like that is not exposed to wind and rain, as shown in FIG. 5, the seal member is composed of one O-ring, and the mounting piece 13g. Instead of being formed into an L shape, the light emitting device may be configured to protrude horizontally from the main body case 13 to form a smaller and thinner light emitting device.

  In addition, the substrate 12a of the light emitting unit 12 has a screw or a silicone resin or epoxy having good thermal conductivity with respect to the substrate support unit 13e of the main body case 13 in order to dissipate the heat generated from the LED 11 more effectively. You may fix by means, such as adhesives which consist of resin. In the case of fixing with screws, if necessary, it is fixed in close contact with the substrate support portion 13e having a flat surface through a sheet of silicone resin or epoxy resin having good thermal conductivity, an adhesive, or the like. .

  In FIG. 5 showing the modification, the same parts as those in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted. Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Light-emitting device 11 Solid light emitting element 12 Light emission part 13 Main body case 14 Translucent cover member 15 Seal member 15a Insertion part 16 Electric wire

Claims (2)

A light emitting part comprising a solid light emitting element;
A main body case in which the light emitting unit is disposed;
A translucent cover member fitted to the side surface of the main body case so as to cover the light emitting portion;
An elastic sealing member interposed between the side surface of the main body case and the inner side surface of the translucent cover member;
A light-emitting device comprising: The light-emitting device according to claim 1, wherein the seal member has an insertion portion that inserts the introduced electric wire in an airtight manner.

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