JP2020021541A - Illuminating device - Google Patents

Abstract

To provide an illuminating device whose cost is reduced by achieving commonality of components, and that can restrain deterioration of a pictogram.SOLUTION: An illuminating device 11 comprises: a main body 12; a light source part 23 provided inside the main body 12; a light guide plate 43 for guiding light emitted from the light source part 23; a translucent cover 42 covering the light guide plate 43; and a diffusion sheet 41 comprising a pictogram on a surface, for diffusing the light guided by the light guide plate 43, and arranged between the light guide plate 43 and the translucent cover 42.SELECTED DRAWING: Figure 3

Description

  Embodiments of the present invention relate to a lighting device.

  Conventionally, a guide light has an appliance body, a display unit attached to the appliance body, a lamp unit having a lamp for illuminating the display unit, a storage battery serving as an emergency power supply, and switching a power supply between a normal power supply and a storage battery to switch the lamp. A lighting device for lighting is provided. The display unit includes a panel case, a display panel attached to the panel case, and a light guide plate, and a pictogram is printed on a surface of the display panel.

  Such a guide light turns on a lamp using electric power from a commercial power supply or a storage battery, light emitted from the lamp is guided to a display panel by a light guide plate, and the guided light is used as a display on which a pictogram is printed. Radiated out of the instrument through the panel. The pictogram is displayed to guide the user to the evacuation exit.

  However, in the conventional structure, when the pictogram has directionality, it is necessary to prepare a plurality of types of display panels on which the pictogram is printed. Further, since the pictogram is printed on the surface of the display panel, there is a problem that the pictogram is deteriorated due to scratches and stains due to external contact or the like.

JP 2007-80682 A

  The problem to be solved by the present invention is to provide a lighting device that can reduce the cost by using common components and can suppress the deterioration of the pictogram.

  The lighting device according to the embodiment has a main body, a light source unit provided inside the main body, a light guide plate for guiding light emitted from the light source unit, a translucent cover covering the light guide plate, and a pictogram on the surface. And a diffusion sheet disposed between the light guide plate and the translucent cover, while diffusing the light guided by the light guide plate.

  ADVANTAGE OF THE INVENTION According to this invention, while reducing cost by sharing parts, it can be expected that pictogram degradation is suppressed.

FIG. 3 is a perspective view of the lighting device of the first embodiment in an assembled state. FIG. 2 is a perspective view of the lighting device in a disassembled state of a main body and a display body. It is a perspective view of the disassembled state of the display body of a lighting device same as the above. FIG. 4 is a schematic explanatory view showing a side view of the disassembled state of the display body of the lighting device. FIG. 3 is a diagram showing a pictogram printed on a diffusion sheet of the lighting device. It is a typical explanatory view showing a side view of a disassembled state of a display body of a lighting device of a second embodiment.

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

  1 is a perspective view of an exploded state of a main body of a lighting device and a display body, FIG. 2 is a perspective view of an assembled state of the lighting device, FIG. 3 is a perspective view of an exploded state of a display body of the lighting device, and FIG. FIG. 4 is a schematic explanatory view showing a side view of a disassembled state of the display body of FIG.

  As shown in FIGS. 1 and 2, the lighting device 11 is configured to be usable by being installed on an installation surface such as a ceiling surface or a vertical wall surface, and is detachably attached to the main body 12 and the main body 12. Display 13 is provided. Note that a direction perpendicular to the wide main surface side of each display body 13 attached to the main body 12 is called a display surface direction.

  The main body 12 has a top surface portion 16, a bottom surface portion 17, side surface portions 18 on both sides, and a back surface portion 19 disposed between the inside thereof, and an opening 20 covered with the display body 13 in the display surface direction is formed. ing. On the outer surface of the bottom portion 17 of the main body 12 and the outer surfaces of the side portions 18 on both sides, a recessed display body fitting portion 21 to which the display body 13 is fitted and fitted is formed corresponding to the mounting position of the display body 13. I have.

  A light source unit 23 for illuminating the display 13 is attached to an upper portion inside the opening 20 of the main body 12. As the light source unit 23, for example, an LED is used, a plurality of LEDs are surface-mounted on an elongated substrate, and the light source unit 23 is disposed below the opening 20 in a direction in which light is emitted. A mounting unit 25 having a battery mounting portion 24 is mounted on a lower side in the opening 20. The mounting unit 25 includes a terminal block 26 to which an electric wire for supplying a normal power supply such as a commercial power supply to the lighting device 11 is connected, a battery 27 serving as an emergency power supply to be mounted on the battery mounting portion 24, A lighting unit 28 for lighting a light source included in the light source unit 23 by switching with an emergency power supply is mounted.

  An attachment hole (not shown) for attaching the lighting device 11 to the ceiling surface and an electric wire insertion hole (not shown) through which an electric wire is inserted are formed in the upper surface portion 16 of the main body 12.

  At a position near one end of the bottom surface portion 17 of the main body 12, a battery attachment / detachment port 34 is provided to allow the battery 27 to be attached / detached to / from the battery attachment portion 24 of the attachment unit 25 disposed inside. , A battery opening / closing cover 35 is attached so as to be openable and closable. Further, at a position near the other end of the bottom portion 17 of the main body 12, a plurality of inspection switches 36 for inspecting the battery 27 and the lighting unit 28, and a plurality of light emitting diodes for displaying the state of the light source provided in the battery 27 and the light source unit 23 are provided. Is displayed.

  As shown in FIG. 3, the display body 13 includes a cover body 40 detachably attached to the main body 12, a reflection sheet 44, a light guide plate 43, a diffusion sheet 41, and a translucent cover 42 attached to the cover body 40. It has.

  The cover body 40 fits into the display body fitting part 21 of the upper surface part 16 of the main body 12 and fits into the display body fitting part 21 of the bottom part 17 of the main body 12 and the upper light source cover part 45 covering the light source part 23. A lower L-shaped overlapping portion 46 overlapping the lower surface of the main body 12 and a side surface portion 47 fitted into the display body fitting portion 21 of the side surface portion 18 of the main body 12 are integrally formed. Further, between the light source cover portion 45 and the overlapping portion 46 and the side surface portion 47 of the cover body 40, a storage recess 48 into which the reflection sheet 44, the light guide plate 43, the diffusion sheet 41, and the translucent cover 42 are fitted is formed. A partition plate 49 is formed to cover the inner surface of the storage recess 48. An insertion groove 50 into which the reflection sheet 44, the light guide plate 43, the diffusion sheet 41, and the translucent cover 42 are inserted is formed between the upper part of the partition plate 49 and the lower part of the light source cover part 45. The width of the insertion groove 50 between the upper part of the partition plate 49 and the lower part of the light source cover part 45 is larger than the thickness of the translucent cover 42 and the light guide plate 43. It is formed so that it can be easily inserted. Further, a plurality of locking claws 51 are protruded from both side surfaces and a bottom surface in the storage recess 48.

  As shown in FIG. 3, the reflection sheet 44, the light guide plate 43, the diffusion sheet 41, and the translucent cover 42 are arranged in this order from the partition plate 49 toward the front.

  The reflection sheet 44 is, for example, a sheet material made of a synthetic resin colored white, and is formed so that the surface is a reflection surface. The reflection sheet 44 reflects the light of the light source guided from the light guide plate 43 toward the partition plate 49 toward the display surface.

  The light guide plate 43 is formed of, for example, a synthetic resin such as an acrylic resin or a polycarbonate resin, and is formed by dot printing in which ink containing a light transmission control material (white pigment) is regularly printed on a surface facing the light emission surface, Light distribution means such as a prism cut shape or dot processing for providing a plurality of irregularities on the surface facing the light emitting surface, and a rough surface processing for polishing the surface facing the light emitting surface to provide fine irregularities are provided. Has the function of guiding the reflected light to the light exit surface. The light guide plate 43 has an upper surface as an incident surface of light from a light source, and a surface facing the translucent cover 42 as an exit surface of light. The light guide plate 43 is formed such that the rear side facing the light exit surface is inclined so that the thickness dimension in the direction perpendicular to the vertical direction becomes smaller as approaching from the upper surface to the lower surface.

  The diffusion sheet 41 is a sheet in which a diffusion material is dispersed on one side of a transparent resin sheet that is thinner than the light guide plate 43 and the translucent cover 42, and has a function of diffusing incident light. As shown in FIG. 4, the diffusion sheet 41 has a diffusion surface 411 in which a diffusion material is dispersed on one side, and a pictogram representing a pattern, a character, an arrow, or the like indicating guidance on the other side opposite to the one side. Has a pictogram printing surface 412 printed by, for example, inkjet printing or screen printing. That is, the diffusion sheet 41 has the diffusion surface 411 and the pictogram printing surface 412. By printing the pictogram on the surface opposite to the diffusion surface 411, the pictogram can be printed satisfactorily, and since no ink is printed on the diffusion surface 411, there is no possibility that the degree of diffusion of the diffusion surface 411 is reduced. The pictogram is printed with green ink, the light emitted from the light guide plate 43 and passing through the pictogram is converted to green, and the light passing through the unprinted portion becomes white light. Therefore, the pictogram is sharpened by the contrast of the light color due to the light irradiation and can be visually recognized. The diffusion sheet 41 is disposed such that the diffusion surface 411 faces the light-transmitting cover 42 and the pictogram printing surface 412 faces the light guide plate 43.

  The light-transmitting cover 42 has a light-transmitting property, and has an edge portion 52 for fitting the diffusion sheet 41 and the light guide plate 43 on both sides and a lower side, and a recessed step portion 53 formed on an upper side. . That is, the diffusion sheet 41 is sandwiched between the translucent cover 42 and the light guide plate 43. A plurality of engagement holes 54 are formed in the edge 52 so as to be able to be locked to each locking claw 51.

  Then, the upper end of the light-transmitting cover 42 in which the light guide plate 43 and the diffusion sheet 41 are incorporated is inserted obliquely from below into the insertion groove 50 of the cover body 40 in which the reflection sheet 44 is provided in the direction of the display surface of the partition plate 49. The step portion 53 of the light cover 42 is engaged with the lower portion of the light source cover portion 45, and the lower side of the light cover 42 is rotated so as to be fitted into the recess 48 of the cover body 40. When the translucent cover 42 is fitted into the storage recess 48, each engaging hole 54 of the translucent cover 42 is engaged with each locking claw 51 of the storage recess 48, and the light is locked in the fitted state. Have been.

  In this way, the lighting device 11 prints the pictogram on the diffusion sheet 41, and thus the diffusion sheet 41 is printed even when the directionality of the pictogram is different, such as one that guides rightward or one that guides leftward depending on the installation location. It is only necessary to replace the members, and members other than the diffusion sheet 41 can be used in common, so that manufacturing costs can be reduced. Further, the diffusion sheet 41 is thinner than the translucent cover, and is less likely to be broken and damaged, so that it is easy to store.

  In addition, since the diffusion sheet 41 on which the pictogram is printed is covered with the translucent cover 42, the lighting device 11 can prevent the pictogram from coming into contact with the pictogram from the outside. Thereby, deterioration of the pictogram due to scratches and dirt can be suppressed.

  Also, as shown in FIG. 5, the diffusion sheet 41 on which different pictograms are printed as shown in FIG. 5A or FIG. Appropriate pictograms can be easily changed accordingly.

  Further, in order to uniformly emit the light derived from the light guide plate 43 to the outside, it is necessary to provide a diffusion member such as the diffusion sheet 41. By printing a pictogram on the surface of the diffusion sheet 41, the number of parts is increased. Can be reduced. This pictogram is printed on the diffusion sheet 41 having a smaller thickness than the light guide plate 43 and the translucent cover 42, so that the distance between the diffusion surface and the printing surface becomes shorter. Spread. Further, for example, when a pictogram is printed on the translucent cover 42, the translucent cover 42 is difficult to print because the edge 52 and the recessed step 53 are formed, and the printing according to the shape of the cover is performed. Machine is required. On the other hand, since the diffusion sheet 41 is thinner and has a uniform shape than the light-transmitting cover 42, it is easier to manufacture than when printing is performed on the light-transmitting cover 42.

  Next, the light emission path of the illumination device 11 will be described with reference to FIG.

  In the lighting device 11, light is emitted from the light source unit 23, and the light is incident on the upper surface of the light guide plate 43. The light incident on the light guide plate 43 is guided and emitted to the diffusion sheet 41 in the display surface direction. Light leaking from the light guide plate 43 to the rear side is reflected by the reflection sheet 44 and is emitted to the diffusion sheet 41 via the light guide plate 43. The light incident on the diffusion sheet 41 passes through the pictogram printing surface 412, is diffused by the diffusion surface 411, and is emitted to the outside through the translucent cover.

  That is, since the light is converted to green by the printing surface of the diffusion sheet 41 and then diffused by the diffusion surface, the white and green light can be diffused over a wide range.

  Accordingly, by printing the pictogram on the diffusion sheet 41, the deterioration of the pictogram can be suppressed, and the lighting device can have a good diffusion property.

  Also, since the diffusion sheet 411 is provided on one side of the diffusion sheet and the pictogram printing surface 412 is provided on the other side, the front and back of the diffusion sheet can be easily distinguished. It is possible to suppress the risk of incorrectly arranging.

  Next, a second embodiment will be described with reference to the drawings.

  The basic configuration of the lighting device of the second embodiment is the same as that of the first embodiment, but differs in the diffusion sheet.

  FIG. 6 is a schematic explanatory view showing a side view of the disassembled state of the display body of the illumination device according to the second embodiment. As shown in FIG. 6, the diffusion sheet 41 has a pictogram printing surface 412 on one surface side, and has a diffusion surface 411 on the other surface side opposite to one side surface. The diffusion sheet 41 is disposed such that the pictogram printing surface 412 faces the light-transmitting cover 42 and the diffusion surface 411 faces the light guide plate 43. That is, in the second embodiment, the diffusion surface 411 of the diffusion sheet 41 of the first embodiment and the pictogram printing surface 412 are arranged so as to be reversed.

  Next, a light emission path of the illumination device 11 of the second embodiment will be described with reference to FIG.

  In the lighting device 11, light is emitted from the light source unit, and the light enters the upper surface of the light guide plate 43 and is emitted to the diffusion sheet 41. Light leaking from the light guide plate 43 to the rear side is reflected by the reflection sheet 44 and is emitted to the diffusion sheet 41 via the light guide plate 43. The light incident on the diffusion sheet 41 is diffused by the diffusion surface 411, passes through the pictogram printing surface 412, passes through the translucent cover, and is emitted to the outside.

  That is, the light is diffused by the diffusion surface of the diffusion sheet 41 and then converted to green by the printing surface. Therefore, the contrast of the pictogram can be displayed well.

  Therefore, by printing the pictogram on the diffusion sheet 41, it is possible to suppress deterioration of the pictogram and to provide an illumination device that can display the pictogram well.

  In addition, although the form in which the pictogram is printed on the diffusion sheet 41 by, for example, inkjet printing or screen printing has been described in the embodiment, the present invention is not limited to this. For example, a spray coat may be used.

  Although an embodiment of the present invention has been described, this embodiment is provided by way of example and is not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

DESCRIPTION OF SYMBOLS 11 Illumination device 12 Main body 13 Display body 23 Light source part 40 Cover body 41 Diffusion sheet 42 Translucent cover 43 Light guide plate 44 Reflection sheet 45 Light source cover part 46 Overlapping part

Claims (3)

Body and;
A light source unit provided inside the main body;
A light guide plate for guiding light emitted from the light source unit;
A light-transmitting cover that covers the light guide plate;
A diffusion sheet having a pictogram on its surface, diffusing the light guided by the light guide plate, and disposed between the light guide plate and the translucent cover;
A lighting device comprising:   2. The diffusion sheet according to claim 1, wherein the diffusion sheet has a diffusion surface on one surface side, has the pictogram on the other surface side, and is arranged such that the one surface side is opposed to the translucent cover. 3. The lighting device according to claim 1. The diffusion sheet according to claim 1, wherein the diffusion sheet has a pictogram on one surface side, has a diffusion surface on the other surface side, and is arranged so that the one surface side faces the light guide plate. Lighting equipment.

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