JP5342481B2 - Lighting equipment for light-emitting display board - Google Patents

Description

  The present invention relates to a lighting device for a light-emitting display plate used for a light-emitting display plate such as a signboard, a display plate, a guide plate, and a light-type license plate that emits light.

  In order to improve nighttime visibility, license plates used in automobiles and the like include a letter type license plate in which a character portion of a metal plate is punched and a transparent synthetic resin plate is installed in that portion. On the back side of the light license plate, a light license plate lighting device (light emitting display light device) is arranged, and the light of the light license plate is illuminated with a light license plate. The instrument shines.

  A general lighting device for a light-emitting license plate includes a light source unit in which a light source such as a light emitting diode is disposed, a light guide plate, a case for housing them, and the like. The letters on the license plate are shined by being emitted from the surface.

JP 2009-300957 A Japanese Patent Laid-Open No. 10-338074

  Light license plate luminaires are used under severe weather conditions such as typhoons and thunderstorms, climatic conditions such as use in coastal areas, and conditions where vibrations are always applied. A situation such as a short circuit is assumed. Therefore, usually, measures are taken to prevent a failure of the light source unit from intrusion, vibration, etc. of water or the like by sealing the lid and the housing constituting the case in which the light source unit is accommodated with an adhesive.

  However, since the failure of the light source unit due to the entry of water or the like, vibration, or the like cannot be completely prevented, the light source unit may fail. In this case, conventionally, since the light source unit is housed in the bonded case, it is not possible to remove only the light source unit and replace it with a new light source unit. The repair cost was very high.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a lighting fixture for a light emitting display panel that is excellent in exchangeability of a light source unit.

  The light-emitting display panel lighting fixture of the present invention includes a light source unit in which light sources made of light-emitting diodes are arranged at predetermined intervals in the length direction, and an emission surface that emits light emitted from the light source. And a fixed detachable member for fixing the light source unit to the case and for detaching the light source unit from the case, and an opening for allowing the light source unit to be taken in and out is formed in the case. .

  In the light emitting display panel lighting device, it is preferable that a guide groove is formed in the case, and the light source unit is installed in the guide groove.

  In the lighting fixture for a light emitting display panel, it is preferable that at least one of a side surface and a bottom surface of the guide groove is provided with a rib that contacts the light source unit.

  Further, in the light-emitting display panel lighting device, the light source unit has an end portion formed in a different shape for each rated voltage, and the light source unit having a different rated voltage is not installed in the guide groove. It is preferable that a stopper portion that engages with the shape of the end portion is provided.

  Further, in the lighting device for a light emitting display panel, the fixed detachable member includes a bolt and a plate material on which an internal thread portion is formed, and a sealing portion that seals the opening at an end portion of the light source unit A bolt hole is formed in the sealing portion of the light source unit and the case, and the bolt is screwed into the female screw portion of the metal plate through the sealing portion of the light source unit and the bolt hole of the case. In addition, it is preferable that the opening is sealed by the sealing portion of the light source unit.

  In the light emitting display panel lighting device, it is preferable that the light source unit is installed on a side surface of the case in the vertical direction.

  Moreover, the said lighting device for light emission display panels WHEREIN: The said case is comprised from a cover body and a container, and it is preferable that the said cover body and the said container are fixed by bolting.

  Moreover, it is preferable that the said lighting fixture for light emission display boards is a lighting type number plate lighting fixture with which a light type number plate is mounted | worn.

  According to the present invention, even when a light source unit fails, only the light source unit can be removed and replaced with a new light source unit.

It is a model exploded perspective view which shows an example of a structure of the lighting fixture for light emission display boards which concerns on this embodiment. (A) is a model perspective view which shows an example of a structure of a light source unit, (B) is a model side view which shows an example of a structure of a light source unit. It is a schematic diagram which shows the fixed location of a light source unit and a case. It is a schematic diagram which shows another example of the fixing location of a light source unit and a case. It is a schematic diagram which shows another example of the fixing location of a light source unit and a case. It is a schematic diagram which shows another example of the fixing location of a light source unit and a case. It is a partial schematic cross-sectional view of the housing body of the case. It is a schematic plan view which shows an example of the structure of the back surface of the lighting fixture for light emission display boards. It is a schematic cross section which shows the edge part shape of a light source unit, and the edge part shape of a guide groove.

  FIG. 1 is a schematic exploded perspective view showing an example of a configuration of a lighting fixture for a light-emitting display panel according to the present embodiment. As shown in FIG. 1, the light-emitting display panel lighting fixture 1 includes a light source unit 10, a reflection sheet 12, a light guide plate 14, a case including a lid 16 and a housing 18, a plate nut 22, and a light-emitting type. A light-emitting display board (not shown) such as a license plate. The lid body 16 includes a diffusion plate 24 and a frame body 26 disposed on the periphery thereof, and the frame body 26 and the diffusion plate 24 are integrated with an adhesive or the like.

  The light-emitting display panel lighting device 1 according to the present embodiment includes a lid 16 in which a diffusion plate 24 and a frame 26 are integrally formed on the front side (upper side in FIG. 1) of the light guide plate 14, and the back side (FIG. 1). The reflection sheet 12 is overlaid on the lower side of the upper side, and the light source unit 10 is disposed facing the side end face of the light guide plate 14. The lid body 16 and the frame body 26 are bolted with bolts 28 or the like so as to accommodate the light source unit 10, the reflection sheet 12, and the light guide plate 14. In order to improve the sealing between the lid 16 and the frame 26, packing rings 30 are provided in some bolt holes.

  The light guide plate 14 diffuses and emits light incident from the side end face opposed to the light source unit 10 over one side (or both sides) thereof. As the light guide plate 14, for example, an acrylic resin plate mixed with a light diffusing agent can be used. Examples of the light diffusing agent include spherical synthetic resin particles and inorganic particles such as titanium oxide. In the light guide plate 14 according to the present embodiment, the surface on which the diffusion plate 24 is overlapped is a light emission surface that emits light, and the opposite surface is a non-light emission surface in which light emission is blocked by the reflection sheet 12.

  The reflection sheet 12 reflects light emitted from the non-emission surface side of the light guide plate 14 toward the emission surface side to improve the luminance of the emission surface. Examples of the reflection sheet 12 include white paper, white synthetic resin sheet, paper having a metal reflection layer such as aluminum, or synthetic resin sheet. The reflection sheet 12 and the light guide plate 14 shown in FIG. 1 are separate bodies and are stacked on the non-emitting surface side of the light guide plate 14. Is also possible. In addition, in the reflection sheet 12 shown in FIG. 1, the side end surface facing the light source unit 10 has a protrusion 12a that is bent at a predetermined interval. With this configuration, light from the light source can be efficiently guided to the light guide plate 14. The protrusion 12a is spaced a predetermined distance so as to be positioned between the light emitting diodes disposed in the light source unit 10.

  The diffusion plate 24 promotes diffusion of light emitted from the emission surface of the light guide plate 14, and the surface opposite to the light guide plate 14 serves as an emission surface that emits light. Examples of the diffusion plate 24 include an acrylic plate mixed with a light diffusing agent. If the light diffusion action at the light guide plate 14 is sufficient, the diffusion plate 24 is not necessarily provided. In this case, the frame body 26 is disposed on the periphery of the light guide plate 14, and these are integrated with an adhesive or the like to form the lid body 16. Although the diffusion plate 24 and the light guide plate 14 shown in FIG. 1 are separate and are stacked on the light emission surface side of the light guide plate 14, they can be integrally laminated on the light emission surface of the light guide plate 14. It is.

  FIG. 2A is a schematic perspective view illustrating an example of the configuration of the light source unit, and FIG. 2B is a schematic side view illustrating an example of the configuration of the light source unit 10. As shown in FIG. 2, the light source unit 10 is formed by arranging a plurality of light emitting diodes 34 on a substrate 32, and the light emitting diodes 34 are arranged at predetermined intervals in the length direction of the substrate 32. A sealing portion 36 is provided at one end of the substrate 32. The sealing part 36 is a resin-molded product, and is obtained by molding one end of the substrate 32 with a resin material and molding it into a predetermined shape. The sealing part 36 functions as a lid for sealing an opening provided on the side surface of the case or the like as will be described later. As shown in FIG. 1, a lead wire 38 is connected to the substrate 32, and the lead wire 38 is connected to a power supply unit mounted on an automobile or the like, and is connected to the light emitting diode 34 via the lead wire 38 from the power supply unit. When the voltage is applied, the light emitting diode 34 emits light.

  FIG. 3 is a schematic diagram illustrating a fixing portion between the light source unit and the case. As shown in FIG. 3, an opening 40 for inserting the light source unit 10 is provided on the side surface of the case 20 (the lid body 16 and the housing body 18). By providing the opening 40, the light source unit 10 can be taken in and out of the opening 40 without removing the lid 16 and the housing 18 of the case.

  The light source unit 10 and the case 20 are fixed by a fixing member. The fixing member shown in FIG. 3 is constituted by a plate nut 22 formed with a bolt 44 and a female screw portion 46 into which the bolt 44 is screwed. As shown in FIG. 1, the plate nut 22 is provided with a recess 22 a (may be an opening) for inserting the light source unit 10. The sealing portion 36 and the case 20 are formed with bolt holes 48 and 50 that engage with the female screw portion 46 of the plate nut 22.

  For example, when mounting the light source unit 10, the substrate 32 of the light source unit 10 is inserted from the opening 40, and the bolt hole 48 of the sealing portion 36 is engaged with the bolt hole 50 of the case 20 and the female screw portion 46 of the plate nut 22. The light source unit 10 is fixed to the case 20 by screwing the bolts 44 into the female screw portions 46 of the plate nut 22 through the sealing portions 36 and the bolt holes 48 and 50 of the case 20. At that time, since the opening 40 of the case 20 is closed by the sealing portion 36, the inside of the case 20 is sealed, and the light source unit 10 can be protected from rain, dust, and the like. Further, when the light source unit 10 fails or is at the end of its life, the light source unit 10 can be removed from the opening 40 and replaced with a new light source unit 10 by removing the bolts 44 of the fixing member.

  The configuration of the fixing member is limited to the plate nut 22 in which the bolt 44 and the female screw portion 46 shown in FIG. 3 are formed as long as the light source unit 10 can be fixed to the case 20 and can be detached from the case 20. is not. For example, a general annular nut or the like may be used instead of the plate material such as the plate nut 22, but it is preferable to employ the plate nut 22 in terms of the assembly strength of the light source unit 10. Hereinafter, other examples of the fixing member will be described.

  FIG. 4 is a schematic diagram illustrating another example of a fixing portion between the light source unit and the case. As shown in FIG. 4, the fixing member may be composed of, for example, a locking claw 52 formed so as to protrude outside the sealing portion 36 and a locking hole 54 formed in the case 20. Good. The light source unit 10 is fixed to the case 20 by fitting the locking claw 52 into the locking hole 54, and the light source unit 10 is detached from the case 20 when pulled out. The locking claw 52 and the locking hole 54 are not particularly limited as long as the light source unit 10 can be fixed to the case 20. For example, the locking claw 52 is attached to the case 20. A locking hole 54 may be provided in the sealing portion 36.

  FIG. 5 is a schematic diagram illustrating another example of a fixing portion between the light source unit and the case. As shown in FIG. 5, bolt holes 48 and 50 are formed in the end portion of the substrate 32 of the light source unit 10 and the case 20, and when the light source unit 10 is attached, the light source unit 10 is inserted from the opening 40. The hole 48 is engaged with the bolt hole 50 of the case 20 and the annular nut 22 (substantially a female thread portion), and the bolt 44 is screwed into the annular nut 22 via the board 32 and the bolt holes 48, 50 of the case 20. As a result, the light source unit 10 is fixed to the case 20. And the sealing part 36 separate from the light source unit 10 is fitted into the opening 40 to seal the inside of the case 20. In this case, the sealing portion 36 is preferably made of a rubber material or the like in order to improve the sealing property of the opening 40. Further, when the light source unit 10 fails or is at the end of its life, the fixing member bolt 44 is removed, the light source unit 10 is removed from the opening 40, and is replaced with a new light source unit 10.

  FIG. 6 is a schematic diagram illustrating another example of a fixing portion between the light source unit and the case. As shown in FIG. 6, a fixing member that fixes the light source unit 10 is attached to the case 20. The fixing member includes a shaft portion 56, a support shaft 58, and an arm portion 60, and the arm portion 60 slides around the support shaft 58. Further, as shown in FIG. 6, a locking hole 54 is provided on the case 20 side, and the end of the arm portion 60 is fitted into the locking hole 54, so that the light source unit 10 is attached to the case 20. Fixed.

  Although not shown in the figure, after the substrate 32 of the light source unit 10 is inserted from the opening 40 and the opening 40 is closed by the sealing portion 36, the sealing portion 36 is pressed toward the case 20. As described above, the light source unit 10 may be fixed to the case 20 by fitting a stretchable ring member to the outer periphery of the case 20.

  FIG. 7 is a partial schematic cross-sectional view of a case housing. As shown in FIG. 7, a guide groove 62 in which the light source unit 10 is installed is formed in the container 18. The guide groove 62 is for guiding the light source unit 10 inserted from the opening 40 to a predetermined position. The guide groove 62 prevents the light source unit 10 from being set at an inappropriate position, and allows the light source unit 10 to be removed smoothly. In addition, a plurality of ribs 64 (or one) may be provided on the side surface of the guide groove 62 in contact with the substrate 32 of the light source unit 10. Thereby, since the light source unit 10 is fixed in the guide groove 62, even if an impact is applied to the light-emitting display panel lighting device 1, positional deviation of the light source unit 10, vibration of the light source unit 10, and the like are suppressed and stable. Luminous performance can be maintained. In the present embodiment, the example in which the guide groove 62 is provided in the container 18 of the case 20 has been described. However, the guide groove 62 may be provided in at least one of the container 18 and the lid body 16. Further, the rib 64 formed in the guide groove 62 is not necessarily limited to the side surface, and may be formed on the bottom surface of the guide groove 62 as long as vibration of the light source unit 10 can be suppressed. It may be formed in both.

  Assuming a case where water enters the case 20 of the light-emitting display panel lighting device 1 according to the present embodiment, the water accumulates at the bottom (in the vertical direction) of the case 20. Therefore, in the present embodiment, the light source unit 10 may be disposed at any location in the case 20, but the light source unit 10 is disposed in the upper side surface in the vertical direction in the case 20 in order to avoid failure of the light source unit 10 due to water. It is preferable to install in.

  FIG. 8 is a schematic plan view showing an example of the configuration of the rear surface of the light-emitting display panel lighting fixture. In the general lighting fixture 1 for a light emitting display panel, the lid 16 and the container 18 are sealed with an adhesive because the assembly is easy. However, under severe conditions such as a typhoon, water enters the case 20 from the adhesive portion. Therefore, in this embodiment, the case 20 may be sealed with an adhesive or the like. However, as shown in FIGS. 1 and 8, the case 16 and the case 16 are accommodated in that the sealing property in the case 20 can be improved. It is preferable to seal the body 18 by bolting. The positions of the bolts 28 are not particularly limited, but a plurality of bolts 28 are preferably set around the periphery of the case 20 as shown in FIGS.

  FIG. 9 is a schematic cross-sectional view showing the end shape of the light source unit and the end shape of the guide groove. For example, as shown in FIG. 9 (A), a notch is formed on the container 18 side (the lower side of the figure) at the end of the substrate 32 of the light source unit 10 having a high rated voltage (for example, rated voltage 26.4 V). 66a is formed, and for example, as shown in FIG. 9B, the lid 16 side (upper side in the figure) at the end of the substrate 32 of the light source unit 10 having a low rated voltage (for example, rated voltage 13.2V). In addition, a notch 66b is formed. Then, in the case 20 that houses the light source unit 10 having a high rated voltage, as shown in FIG. 9A, a notch 66a formed in the light source unit 10 having a high rated voltage is formed in the guide groove 62 of the case 20. A stopper protrusion 68 is provided to engage with the shape of. That is, as shown in FIG. 9B, even if the light source unit 10 having a low rated voltage is to be assembled to the case 20 that houses the light source unit 10 having a high rated voltage, the stopper projection 68 cannot be assembled. . Normally, if the light source unit 10 having a low rated voltage is mistakenly assembled to a product using the light source unit 10 having a high rated voltage, the light source unit 10 having a low rated voltage is short-circuited. Such erroneous assembly is prevented, and damage to the light source unit 10 having a low rated voltage can be suppressed. On the other hand, the case 20 that houses the light source unit 10 having a low rated voltage may be provided with a stopper protrusion that engages with the shape of the notch 66b formed in the light source unit 10 having a low rated voltage. Even if the light source unit 10 having a high rated voltage is mistakenly assembled to a product using the voltage light source unit 10, the light emitting diode 34 is not turned on and the light source unit 10 having a high rated voltage is not short-circuited. It is not necessary to provide a part.

  A light-emitting display plate is provided on the light-emitting surface side of the light-emitting display plate lighting device 1 according to the present embodiment. The light-emitting display board is, for example, a character printed on a light-transmitting sheet such as an advertisement, or a metal plate colored in a specified ground color, and the character portion is punched, and a transparent synthetic resin plate is pasted on the character portion. Written light license plate. The light-emitting display plate lighting device 1 according to the present embodiment is a light-emitting license plate lighting device used for a light-emitting license plate used in a harsh environment in that the light source unit 10 can be easily replaced. It is preferable to use as.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail more concretely, this invention is not limited to a following example.

  As shown in FIG. 1, a reflective sheet (142 × 297 mm) and a light guide plate (141 × 296 mm) are accommodated in a case container (165 × 330 × 13 mm), and the lid (162 × 327 × 7.3 mm) is accommodated. ) And the container and the lid were bolted. Further, light source units (substrate: 6.6 × 319 mm, light emitting diodes: 17 arranged at intervals of 7 to 40 mm, sealing portion: 14.8 × 12 mm) were prepared.

  Then, the light source unit was inserted from the opening of the case, fixed to the case with a fixing member, and subjected to a luminance test. Then, the light source unit was removed from the case, and another light source unit was repeatedly fixed, luminance tested, and removed. As a result, the variation in the position of the light source unit was within ± 0.1 mm in the longitudinal direction, and the variation in the distance between the light source and the light guide plate was also within 0.1 mm. Here, the luminance changes due to the variation in the position of the light source unit because the variation in the longitudinal direction is ± 0.6 mm or more and the variation in the distance between the light source and the light guide plate is 0.25 mm or more. It was confirmed that the example has a structure in which the luminance does not change even when the light source unit is replaced.

  DESCRIPTION OF SYMBOLS 1 Lighting fixture for light emission display boards, 10 Light source unit, 12 Reflective sheet, 12a Protrusion part, 14 Light guide plate, 16 Lid body, 18 Container, 20 Case, 22 Plate nut or annular nut, 22a Recessed part, 24 Diffusing plate, 26 Frame body, 28 bolt, 30 packing ring, 32 substrate, 34 light emitting diode, 36 sealing portion, 38 lead wire, 40 opening portion, 44 bolt, 46 female thread portion, 48, 50 bolt hole, 52 locking claw, 54 engagement Blind hole, 56 shaft part, 58 support shaft, 60 arm part, 62 guide groove, 64 rib, 66 notch part, 68 stopper protrusion.

Claims (6)

A light source unit in which light sources composed of light emitting diodes are arranged at predetermined intervals in the length direction;
A case that includes an emission surface that emits light emitted from the light source, and that houses the light source unit;
A fixed detachable member for fixing the light source unit to the case and for detaching from the case, and
The case is formed with an opening that allows the light source unit to be taken in and out ,
A guide groove is formed in the case, and the light source unit is installed in the guide groove,
The lighting fixture for a light emitting display panel , wherein ribs are provided on both side surfaces of the guide groove so as to contact the light source unit and sandwich the light source unit . The end of the light source unit is molded into a different shape for each rated voltage,
The bottom surface at the end of the guide groove is different as the rated voltage of the light source unit is not installed, the light emitting according to claim 1, wherein the stopper portion engaged with an end portion shape of the light source unit is characterized in that it is provided Lighting equipment for display boards. The fixed detachable member includes a bolt and a plate material on which an internal thread portion is formed,
A sealing portion that seals the opening is formed at an end of the light source unit,
Bolt holes are formed in the sealing portion of the light source unit and the case,
The bolt is screwed into the female screw portion of the metal plate via the sealing portion of the light source unit and the bolt hole of the case, and the opening is sealed by the sealing portion of the light source unit. The lighting fixture for a light-emitting display panel according to claim 1 or 2 . The light source unit lighting device according to any one of claims 1 to 3 , wherein the light source unit is installed on a side surface of the case in an upper part in a vertical direction. The case is composed of a lid and housing, the light emitting display panel according to any one of claims 1-4, characterized in that it is fixed by bolting to the container and the lid Lighting equipment. The light emitting display plate lighting device according to any one of claims 1 to 5 , wherein the light emitting display plate lighting device is a light type license plate lighting device attached to a light type license plate. lighting equipment.

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