JP5587681B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device.

  When a lighting device having a light source such as an LED is used outdoors or around the water, the lighting unit including the substrate on which the light source is mounted is filled with resin to seal the lighting unit in order to protect it from water and moisture. It has been known. For example, Patent Literature 1 proposes a lighting fixture 40 as shown in FIG. The lighting fixture 40 includes a substantially cylindrical fixture body 41 having an opening 42. An LED unit 44 having an LED 43 that radiates light to the outside through the opening 42 is housed inside the instrument body 41, and a lens unit 45 that controls light distribution from the LED unit 44 is open to the LED unit 44. 42 side is provided. In addition, a transparent cover 46 that covers the LED unit 44 and the lens unit 45 is provided on the opening 42 side with respect to the lens unit 45 inside the instrument body 41, and a translucent resin is filled outside the cover 46. Yes. The filled translucent resin is formed as a sealing portion 47 that covers the entire outer surface of the cover 46, and the LED unit 44 inside the cover 46 is sealed by the sealing portion 47. An air layer 48 is formed between the inner side surface of the cover 46 and the lens portion 45.

  According to this lighting fixture 40, the LED unit 44 inside the cover 46 is sealed by the sealing portion 47, so that waterproofness can be ensured. In addition, since the light refraction effect is obtained by the air layer 48 between the inner side surface of the cover 46 and the lens portion 45, the light from the LED unit 44 can be controlled to a desired light distribution.

JP 2008-293928 A

  However, depending on the material of the translucent resin, the color of the irradiated light may change by absorbing a specific wavelength of the irradiated light from the LED unit 44. There is a problem that selection is difficult. Further, since the translucent resin itself is deteriorated and discolored and the deteriorated discoloration may affect the irradiation light, the selection of the translucent resin is more difficult. Furthermore, since the sealing portion 47 is formed over the entire outer surface of the cover 46 in the instrument main body 41, there is a problem that a large amount of translucent resin is required and filling time is required, and cost reduction is desired. ing.

  The present invention has been made in view of the circumstances as described above, and provides a lighting device that can reduce the amount of resin in the sealing portion by suppressing the influence of the sealing portion on the optical performance while ensuring waterproofness. The challenge is to do.

  An illuminating device of the present invention includes a lighting case having a bottom wall and a peripheral side wall standing upright on the outer periphery of the bottom wall and having an opening on an opposite surface of the bottom wall, and an illumination unit disposed on the bottom wall in the lighting case And a cover that is disposed inside the lighting case and covers the lighting part and emits light from the lighting part to the outside through the opening, and the inside of the lighting case is filled with resin and seals the lighting part inside the cover. The cover has an opening, and the cover has a translucent cover that covers the illumination part disposed inside the opening and the edge of the opening protrudes toward the peripheral side wall. And a flange portion disposed on the bottom wall of the cover, the cover portion and the flange portion excluding at least a light emitting surface for emitting light from the illumination portion to the outside are covered with the sealing portion. It is characterized by being.

  In this lighting device, a wiring part is provided in the illumination part, a wiring opening part penetrating inward and outward is provided in the cover part of the cover, and a plate-like rib is provided on the outer peripheral surface of the cover part at the peripheral part of the wiring opening part. It is preferable that the wiring opening is sealed by filling the inside of the rib with a resin in a state where the wiring opening is inserted into the wiring opening.

  In this illuminating device, it is preferable that a light guide part that guides light from the illuminating part is formed in the cover part of the cover.

  In this illumination device, it is preferable that a lens surface is formed on at least one of the light exit surface of the cover portion of the cover and the light incident surface of light from the illumination portion.

  In the illumination device of the present invention, the cover excluding the light emitting surface is covered with the sealing portion. Thereby, the waterproofness of the illumination part inside a cover is ensured, and the influence of the sealing part which gives to optical performance can be suppressed. Moreover, the resin amount of the sealing part can be reduced.

It is sectional drawing which shows one Embodiment of the illuminating device of this invention. It is a disassembled perspective view except the sealing part in the illuminating device of FIG. It is sectional drawing of the illuminating device of another embodiment. It is sectional drawing which shows the state which installed the illuminating device of another embodiment in the ceiling material. It is sectional drawing of the illuminating device of another embodiment, (a)-(d) is an example which formed each lens surface in the cover part, respectively. It is sectional drawing of the conventional lighting fixture.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view showing an embodiment of a lighting device of the present invention. FIG. 2 is an exploded perspective view of the lighting device of FIG.

  The lighting device 1 includes a cylindrical lighting case 2, a lighting unit 4 accommodated in the lighting case 2, a cover 10 that covers the lighting unit 4, and a sealing unit 30 that seals the lighting unit 4. ing.

  The lighting case 2 is formed in a synthetic resin or metal box shape, and is composed of a rectangular bottom wall 2a and a rectangular peripheral side wall 2b rising from the outer peripheral four sides of the bottom wall 2a. The facing surface has an opening 3.

  The illumination unit 4 includes a light source 5 such as an LED and a substrate 6 having a diameter smaller than that of the bottom wall 2a on which the light source 5 is mounted. The substrate 6 on which the light source 5 is mounted is disposed on the bottom wall 2 a of the lighting case 2 so that the light source 5 is disposed on the opening 3 side of the lighting case 2 and is housed in the lighting case 2. Thereby, the light from the light source 5 is irradiated outside through the opening 3 of the illumination case 2.

  The cover 10 is disposed inside the illumination case 2 so as to cover the illumination unit 4, and has a cylindrical cover unit 11 having an opening 12 and an outer periphery of the opening 12 of the cover 11. It is comprised from the flange part 26 currently formed in the shape. In the present embodiment, the illumination unit 4 is arranged inside the opening 12 formed on one surface of the rectangular box-shaped cover unit 11, and the periphery of the substrate 6 and the light source mounting surface are covered with the cover unit 11. . Here, the inner surface 13 of the cover part 11 and the light source 5 are separated from each other, and an air layer 17 is formed between the cover part 11 and the light source 5. Further, the cover portion 11 has the same or substantially the same height as the peripheral side wall 2 b of the lighting case 2, and the outer side surface 14 of the cover portion 11 located on the opening 3 side is formed on the peripheral side wall 2 b of the lighting case 2. The upper end surface 2c is formed at the same height or substantially the same height. The flange portion 26 protrudes from the edge of the opening 12 of the cover portion 11 toward the peripheral side wall 2 b of the lighting case 2 and is formed in a bowl shape, and the back surface is in contact with the bottom wall 2 a of the lighting case 2. The outer shape of the flange portion 26 has a rectangular shape that substantially matches the inner shape of the peripheral side wall 2 b of the lighting case 2. Therefore, in the state where the cover 10 is disposed inside the lighting case 2, the side end of the flange portion 26 of the cover 10 is in contact with the peripheral side wall 2b of the lighting case 2, or there is almost no gap. It has become. The flange portion 26 has a width (projection length from the opening portion 12 of the cover portion 11 toward the peripheral side wall 2b) of 1 mm so that the resin flows easily when the resin of the sealing portion 30 described later is filled. The above is preferable. The lighting case 2 is set to such a size that the flange portion 26 having such a width is secured.

  In the present embodiment, the cover portion 11 and the flange portion 26 are integrally formed of a transparent synthetic resin such as an acrylic resin or a polycarbonate resin, and have translucency. For this reason, the light from the light source 5 of the illumination unit 4 passes through the cover unit 11 and is emitted from the light emitting surface 15 of the cover unit 11. Here, the light emitting surface 15 of the cover portion 11 is formed on a surface (outer surface 14) opposite to the surface (inner surface 13) of the cover portion 11 facing the light source 5. It refers to the surface that exits to the outside through the opening 3 of the illumination case 2.

  The sealing part 30 is formed by filling the space outside the cover 10 inside the lighting case 2 with resin, and thereby the lighting part 4 inside the cover 10 is sealed. Here, the outer surface 14 of the cover portion 11 and at least the outer surface of the flange portion 26 excluding at least the light emitting surface 15 are covered with the sealing portion 30. In the present embodiment, as described above, the outer surface 14 of the cover portion 11 located on the opening 3 side is formed at the same height or substantially the same height as the upper end surface 2 c of the peripheral side wall 2 b of the lighting case 2. . For this reason, even when the interior of the lighting case 2 is completely filled with resin, a part of the outer surface 14 of the cover part 11, that is, the outer surface 14 located on the opening 3 side is not covered with the resin and exposed to the outside. This exposed surface is used as a light emitting surface 15, and light from the light source 5 is irradiated from the light emitting surface 15 to the outside.

  The resin forming the sealing part 30 may not be transparent, and is not particularly limited as long as it is used as a sealing material. For example, a synthetic resin such as an epoxy resin that is easily available and inexpensive can be used.

  As described above, in the present embodiment, since the periphery of the light emitting surface 15 except the light emitting surface 15 in the cover 10 is covered with the sealing portion 30, the waterproof property of the illumination unit 4 inside the cover 10 is ensured. However, the influence which the sealing part 30 has on the light emission surface 15 can be suppressed. The resin amount of the sealing part 30 can also be reduced. Moreover, since the sealing part 30 is not formed inside the cover 10 and the air layer 17 is formed between the cover part 11 of the cover 10 and the illumination part 4, the light performance of the illumination part 4 is improved. There is also an advantage that it is hardly affected by the sealing portion 30. Furthermore, when the light guide material is disposed facing the light emitting surface 15 of the cover portion 11, the height of the cover portion 11 is adjusted as appropriate to shorten the distance between the light emitting surface 15 and the illumination portion 4. By doing, the distance between a light guide material and the illumination part 4 can also be shortened, and the light-incidence efficiency to a light guide material can be improved.

  In the above embodiment, the outer side surface 14 of the cover portion 11 located on the opening 3 side is formed at the same height or substantially the same height as the upper end surface 2 c of the peripheral side wall 2 b of the lighting case 2. It is not limited to. For example, the height of the cover portion 11 and the height of the peripheral side wall 2b of the lighting case 2 are set so that the outer side surface 14 of the cover portion 11 located on the opening 3 side is higher or lower than the upper end surface 2c of the peripheral side wall 2b. Can be set. Of course, in any case, it is considered that the space outside the cover 10 inside the lighting case 2 is filled with resin so that the portion of the cover portion 11 excluding the light emitting surface 15 is covered with resin. .

  In FIG. 3, sectional drawing of the illuminating device of another embodiment is shown. The same parts as those in the lighting apparatus shown in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof is omitted.

  The board 6 of the illumination unit 4 is provided with a wiring connector 8 for supplying power and a wiring unit 7 such as wiring. In the illumination unit 4 of FIG. It is provided on the surface. The cover portion 11 of the cover 10 is formed with a wiring opening 18 penetrating inward and outward having a shape substantially matching the outer shape of the wiring connector 8, and the wiring connector 8 communicates with the outside through the wiring opening 18. Yes.

  On the outer surface 14 of the cover portion 11, a plate-like rib 19 rises outward at a peripheral edge slightly away from the edge of the wiring opening 18 and is provided in a substantially square shape so as to surround the wiring opening 18. In a state where the wiring connector 8 is inserted into the wiring opening 18, the space surrounded by the ribs 19 is filled with resin to form the wiring opening sealing portion 31. The wiring opening 18 is sealed by the wiring opening sealing portion 31, and the waterproofness of the illumination unit 4 inside the cover 10 is ensured. The height of the rib 19 and the distance from the rib 19 to the edge of the wiring opening 18 are preferably 1 mm or more so that the resin flows easily when the resin is filled.

  The resin forming the wiring opening sealing portion 31 is not particularly limited as long as it is used as a sealing material. For example, a synthetic resin such as an epoxy resin that is easily available and inexpensive can be used.

  In this embodiment, when the wiring part 7 penetrating the cover 10 is provided in the illumination part 4, the waterproofness of the illumination part 4 inside the cover 10 can be more effectively ensured. Since resin only needs to be filled inside the rib 19 at the peripheral edge of the wiring opening 18, a large amount of resin is not required, and the influence on the light emitting surface 15 can be reduced.

  In FIG. 4, sectional drawing of the state which installed the illuminating device of another embodiment in the ceiling material is shown. The same parts as those in the lighting apparatus shown in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof is omitted.

  In the illuminating device 1 of FIG. 1, it is possible to ensure the waterproofness of the illuminating unit 4. However, in order to further improve the reliability, the illuminating unit 4 should be located deeper than the disturbance environment. . For example, when a lighting device is installed in a bathroom as bath lighting, the reliability is further improved because it is in an environment with less moisture when it is disposed on the back side of the ceiling than on the bathroom side.

  In the lighting device 1 of FIG. 4, the cover 10 and the light guide material are integrally formed. That is, in the cover part 11, the light guide part 24 that leads the light of the illumination part 4 is formed by projecting the part facing the illumination part 4 outward from the opening 3 of the illumination case 2. The light guide 24 is made of a member having translucency and a high refractive index, and has an appropriate shape according to the usage pattern of the lighting device 1. In the present embodiment, the long member is substantially rectangular in cross section. In the present embodiment, the cover portion 11 including the light guide portion 24 and the flange portion 26 are integrally formed of a transparent synthetic resin such as an acrylic resin or a polycarbonate resin to form the cover 10. The lighting device 1 is installed on the back surface side of the ceiling material 32, the light guide portion 24 is provided through the ceiling material 32, and the light emitting surface 25 (light emission surface 15) of the light guide portion 24 is exposed indoors. ing. A sealing material 33 made of water-resistant synthetic resin, rubber, or the like is disposed at the peripheral edge of the light emitting surface 25 of the light guide 24, and from the indoor side through a gap between the ceiling material 32 and the light guide 24. Watertightness is ensured so that moisture does not enter the back side of the ceiling material 32.

  Thus, in this embodiment, since the illuminating device 1 is installed in the back surface side of the ceiling material 32, and the illumination part 4 exists in the position behind the disturbance environment, the waterproofness of the illumination part 4 is ensured more effectively. . Moreover, since the light guide part 24 is formed in the cover part 11, even if the illumination part 4 exists in the back position from disturbance environment, the fall of optical performance is suppressed.

  In FIG. 5, sectional drawing of the illuminating device of another embodiment is shown. The same parts as those in the lighting apparatus shown in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof is omitted.

  In the present embodiment, a lens surface 20 is formed on the cover portion 11 of the cover 10, and the lens function is imparted to the cover 10 such that the cover portion 11 functions as a lens body.

  In the illuminating device 1 of FIG. 5A, the light emitting surface 15 of the cover portion 11 is a convex surface 21, and the light is the surface opposite to the light emitting surface 15 (the surface of the cover portion 11 facing the light source 5). The incident surface 16 is a flat surface. In this illuminating device 1, since the light from the light source 5 of the illumination part 4 is condensed on the convex surface 21, the light quantity irradiated outside can be increased.

  In the illuminating device 1 of FIG. 5B, the light emitting surface 15 of the cover portion 11 is a concave surface 22, and the light incident surface 16 is a flat surface. In this illuminating device 1, since the light from the light source 5 of the illuminating unit 4 is diffused by the concave surface 22, it can be irradiated to the outside over a wide range.

  In the illumination device 1 of FIG. 5C, the cover portion 11 has a prism shape. That is, the light emitting surface 15 of the cover portion 11 is an inclined surface 23 that is linearly inclined, the light incident surface 16 is a flat surface, and the thickness of the cover portion 11 increases from the right side to the left side of the drawing. ing. In this illuminating device 1, since the direction in which light from the light source 5 of the illuminating unit 4 is derived is changed by the inclined surface 23, the light emitted to the outside can be controlled to a desired light distribution.

  In the illumination device 1 of FIG. 5D, the light emitting surface 15 of the cover portion 11 is a flat surface, and the light incident surface 16 is a convex surface 21. In this illuminating device 1, since the light from the light source 5 of the illumination part 4 is condensed on the convex surface 21, light-incidence efficiency can be improved. Further, since the convex surface 21 is also formed on the side surface side (the peripheral side wall 2b side) on the inner side surface 13 of the cover portion 11, the light incident efficiency from the side of the light source 5 is enhanced.

  In the present embodiment, the light from the light source 5 is irradiated to the outside through two media having different refractive indexes, the air layer 17 and the cover portion 11. Such a change in refractive index further enhances optical performance such as light collecting property, diffusibility, light changing property, and light incident efficiency. In the present embodiment, the lens surface 20 such as the convex surface 21 or the concave surface 22 is formed on one surface of the light emitting surface 15 or the light incident surface 16 of the cover portion 11, but is not limited thereto, and is formed on both surfaces. It may be. Further, the lens surface 20 can also be a Fresnel lens surface or an uneven surface other than the lens surface described above.

DESCRIPTION OF SYMBOLS 1 Illumination device 2 Illumination case 2a Bottom wall 2b Peripheral side wall 2c Upper end surface 3 Opening 4 Illumination part 7 Wiring part 10 Cover 11 Cover part 12 Opening part 14 Outer side surface 15 Light-emitting surface 17 Air layer 18 Wiring opening part 19 Rib 20 Lens surface 24 Light guide part 26 Flange part 30 Sealing part 31 Wiring opening part sealing part

Claims (4)

An illumination case having a bottom wall and a peripheral side wall standing upright on the outer periphery of the bottom wall, and having an opening on an opposite surface of the bottom wall, an illumination unit disposed on the bottom wall in the illumination case, and the illumination case A cover which is disposed inside and covers the illumination unit and emits light from the illumination unit to the outside through the opening, and the illumination inside the cover is filled with resin inside the cover in the illumination case A sealing part that seals the part, and the cover has an opening part, and a transparent cover part that covers the illumination part disposed inside the opening part and an edge of the opening part A flange portion that protrudes toward the peripheral side wall and is formed in a bowl shape and disposed on the bottom wall, and the flange portion has a shape that substantially matches the inner shape of the peripheral side wall of the lighting case. The rear surface of which is in contact with the bottom wall of the lighting case. Ri, in the cover, the illumination device the cover portion and the flange portion at least except for the light emitting surface for emitting light to the outside from the illumination unit is characterized in that it is covered with the sealing portion.   The illumination part is provided with a wiring part, and the cover part of the cover is provided with a wiring opening penetrating inward and outward, and a plate-like rib is provided on the outer surface of the cover part at the peripheral edge of the wiring opening part. 2. The wiring opening is sealed by filling the inside of the rib with a resin in a state where the wiring opening is inserted into the wiring opening in the wiring opening. Lighting equipment.   The illumination device according to claim 1, wherein a light guide unit that guides light of the illumination unit is formed in the cover unit of the cover.   The illumination device according to claim 1, wherein a lens surface is formed on at least one of a light emission surface of the cover portion of the cover and a light incident surface of light from the illumination portion.

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