JP2014067504A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture where the projecting length of a housing part of a lighting unit downward from a ceiling surface is suppressed.SOLUTION: According to an embodiment of the invention, a lighting fixture includes a fixture body, a light source and a lighting unit. The fixture body includes: a top surface facing to a ceiling surface; a light source attachment surface fitted to the back side of the top surface; a first housing part projecting above the top surface and fitted to the back side of the ceiling surface; and a second housing part located under the first housing part and projecting below the ceiling surface. The lighting unit includes: a lighting device which is housed in a space surrounded by the first housing part and the second housing part and inside the first housing part and the second housing part and controls the lighting of the light source; and a distribution cable connecting the lighting device and the light source.

Description

  Embodiments described herein relate generally to a lighting fixture.

  In the base light directly attached to the ceiling surface, the lighting device and the storage portion of the wiring cable protruding below the ceiling surface are obstacles to thinning.

JP 2011-3434 A

  Provided is a lighting fixture in which a storage length of a lighting unit is suppressed from being protruded downward from a ceiling surface.

  According to the embodiment, the lighting fixture includes a fixture main body, a light source, and a lighting unit. The appliance main body has an upper surface directed to the ceiling surface, a light source mounting surface provided on the back side of the upper surface, a first storage portion protruding above the upper surface and provided on the back side of the ceiling surface, And a second storage portion protruding below the ceiling surface under the first storage portion. The light source is attached to the light source attachment surface of the instrument body. The lighting unit is housed in a space surrounded by the first housing portion and the second housing portion inside the first housing portion and the second housing portion. The lighting unit includes a lighting device that controls lighting of the light source, and a wiring cable that connects the lighting device and the light source.

  The lighting fixture can be made thinner.

The perspective view which looked at the light emission surface side of the lighting fixture of embodiment. The perspective view which looked at the upper surface side of the lighting fixture of embodiment. The perspective view of the mounting plate in the lighting fixture of embodiment. The perspective view of the light source holding plate in the lighting fixture of embodiment. The schematic cross section of the lighting fixture of embodiment. The schematic perspective view of the light source in the lighting fixture of embodiment. The schematic cross section which shows the attachment method of the lighting fixture of embodiment. The schematic cross section which shows the attachment method of the lighting fixture of embodiment. The schematic cross section which shows the other attachment form with respect to the ceiling surface of the lighting fixture of embodiment.

  Hereinafter, embodiments will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same element in each drawing.

Drawing 1 is a perspective view which looked at the light-emitting surface side of lighting fixture 1 of an embodiment.
FIG. 2 is a perspective view of the luminaire 1 as seen from the top side.
FIG. 5 is a schematic cross-sectional view of the lighting fixture 1 attached to the ceiling surface 100.

  The lighting fixture 1 of embodiment has the fixture main body 5, the light source 50, and the lighting unit 60 (shown in FIG. 5). As shown in FIG. 5, the luminaire 1 is attached to the ceiling surface 100 with the light emitting surface of the light source 50 facing downward.

  Here, two directions orthogonal to each other in a plane parallel to the ceiling surface 100 are defined as an X direction (first direction) and a Y direction (second direction). A direction (vertical direction) orthogonal to the X direction and the Y direction is defined as a Z direction (third direction).

The instrument body 5 has a mounting plate 10 shown in FIG. 3 and a light source holding plate 30 shown in FIG.
FIG. 3 is a perspective view of the mounting plate 10.

  The mounting plate 10 includes a first storage portion 14 extending in the Y direction and a pair of top plate portions 11 provided with the first storage portion 14 sandwiched in the X direction.

  The top surface 12 shown in FIG. 2 of the top plate 11 is directed to the ceiling. The 1st accommodating part 14 protrudes upwards rather than the upper surface 12 of the top-plate part 11, and is embedded in the back side of the ceiling surface 100, as shown in FIG.

  The first storage portion 14 is provided at the upper plate portion 15 extending in the Y direction and both ends in the short direction (X direction) of the upper plate portion 15, and hangs down from the upper plate portion 15 toward the top plate portion 11. And a pair of side plate portions 16. The side plate portion 16 also extends in the Y direction.

  The top plate portion 11 is integrally provided at the lower end portion of the side plate portion 16 and extends in the X direction and the Y direction. Outer frames 19 that hang downward from the top plate portion 11 are provided at both ends in the Y direction of the top plate portion 11 and at the end portion in the X direction on the side of the top plate portion 11 that is far from the first storage portion 14. ing.

  The mounting plate 10 is a metal plate molded body in which the top plate portion 11, the outer frame 19, and the first storage portion 14 are integrally provided.

Next, the light source holding plate 30 will be described.
FIG. 4 is a perspective view of the light source holding plate 30.

  The light source holding plate 30 includes a second storage portion 35 extending in the Y direction and a pair of light source attachment portions 31 provided with the second storage portion 35 sandwiched in the X direction.

  The light source mounting portion 31 is formed in a plate shape, and a light source mounting surface 33 is formed on the lower surface thereof. The light source attachment portion 31 is superimposed on the lower surface 13 of the top plate portion 11 of the attachment plate 10. As shown in FIG. 5, the light source mounting surface 33 is directed downward from the ceiling surface 100 in a state where the light source mounting portion 31 is superimposed on the top plate portion 11 of the mounting plate 10.

  A light source 50 is attached to the light source attachment surface 33. A substrate 51 of the light source 50 is screwed to the light source mounting portion 31, for example.

  As shown in FIGS. 1, 2, and 5, the second storage portion 35 is provided directly below the first storage portion 14 of the mounting plate 10 and protrudes below the ceiling surface 100. The second storage part 35 extends in the Y direction, and the length of the second storage part 35 in the Y direction is the same as the length of the first storage part 14 in the Y direction.

  The second storage portion 35 includes a pair of side wall portions 36 and a bottom portion 37 that is provided integrally with the lower end portions of the pair of side wall portions 36 and connects the lower end portions of the pair of side wall portions 36. The side wall portion 36 and the bottom portion 37 extend in the Y direction.

  The pair of side wall portions 36 are inclined with respect to the light source attachment surface 33 so as to form a V-shaped cross section, and extend in the Y direction on the side of the light source 50 attached to the light source attachment surface 33.

  A reflection plate 39 that is inclined with respect to the light source attachment surface 33 and extends in the Y direction is provided at the end of the light source attachment portion 31 that is far from the second storage portion 35. The lower surface of the reflecting plate 39 is inclined with an obtuse angle with respect to the light source mounting surface 33.

  The lower surface of the reflecting plate 39 is mirror-finished or white-coated, and the lower surface of the reflecting plate 39 has reflectivity for light emitted from the light source 50.

  The side surface of the side wall portion 36 of the second storage unit 35 and the light source mounting surface 33 are also mirror-finished or white-coated, and these surfaces have reflectivity with respect to the light emitted from the light source 50.

  The light source holding plate 30 is a molded body of a metal plate in which the light source attachment portion 31, the second storage portion 35, and the reflection plate 39 are integrally provided.

  A plurality of light sources 50 are attached to the light source attachment surface 33. For example, two light sources 50 are arranged in the Y direction on each of the pair of light source mounting surfaces 33 sandwiching the second storage portion 35 in the X direction.

  FIG. 6 is a perspective view of the light source 50.

  The light source 50 includes a rectangular plate-shaped substrate 51 and a plurality of light emitting elements 52 mounted on the substrate 51 and arranged in the longitudinal direction of the substrate 51. For example, two rows of light emitting elements 52 are arranged in the longitudinal direction of the substrate 51 for one substrate 51. The light emitting surface of the light source 50 (the mounting surface of the light emitting element 52) is directed below the light source mounting surface 33.

  The light emitting element 52 is, for example, a light emitting diode (LED). For example, when a gallium nitride (GaN) compound semiconductor is used as the material of the active layer of the LED, short wavelength light having a wavelength of 500 nm or less can be obtained. However, the material of the active layer is not limited to the gallium nitride compound semiconductor.

  In addition to the LED, the light emitting element 52 may be, for example, an organic light emitting diode (OLED), an inorganic electroluminescence light emitting element, an organic electroluminescence light emitting element, or other. An electroluminescent light emitting element or the like can be used.

  The light emitting element 52 also includes a phosphor layer. In the embodiment, for example, the light emitting element 52 includes blue light by a combination of an LED that emits blue light and a phosphor layer that includes the phosphor that absorbs the blue light (excitation light) and converts the light into yellow light. As a mixed color of light and yellow light, light such as white or light bulb color is emitted.

  Since the light source holding plate 30 is a metal plate, it also functions as a heat radiating plate for radiating the heat of the light source 50 to the mounting plate 10 and the ceiling surface 100.

  The light source holding plate 30 is detachably attached to the attachment plate 10 as will be described later. The back surface (upper surface) of the light source mounting portion 31 of the light source holding plate 30 is overlapped with the lower surface 13 of the top plate portion 11 of the mounting plate 10.

  In this state, the second storage portion 35 of the light source holding plate 30 is stacked under the first storage portion 14 of the mounting plate 10. A space 20 (shown in FIG. 5) surrounded by the first storage portion 14 and the second storage portion 35 is provided inside the first storage portion 14 and the second storage portion 35 that are stacked one above the other. It is formed.

  The lighting unit 60 is accommodated in the space 20 as shown in FIG. The lighting unit 60 includes a lighting device 61 that controls lighting of the light source 50 and a wiring cable (internal wiring) 62 that connects the lighting device 61 and the light source 50. .

  The lighting device 61 includes a lighting circuit that converts alternating current of a commercial power source into direct current and outputs the converted light to the light source 50 to light the light emitting element 52, and a cover (case) that covers the lighting circuit. The lighting circuit controls the lighting state of the light emitting element 52 by controlling the magnitude of power supplied to the light emitting element 52 and the power supply time (lighting time) based on an external control signal.

  The lighting device 61 is stored on the upper side (the first storage unit 14 side) in the space 20 formed by the first storage unit 14 and the second storage unit 35. The wiring cable 62 is housed below the lighting device 61 in the space 20. A part of the lighting device 61 may be in the space inside the second storage part 35.

  Next, with reference to FIG.7 and FIG.8, the attachment method of the lighting fixture 1 is demonstrated.

  As shown in FIG. 7, first, the mounting plate 10 is attached to the ceiling surface 100 in a state where the lighting unit 60 is stored in the first storage portion 14.

  Before the attachment plate 10 is attached to the ceiling surface 100, the lighting device 61 of the lighting unit 60 is fixed to the upper plate portion 15 of the first storage portion 14 by, for example, screws. Alternatively, after attaching the mounting plate 10 to the ceiling surface 100, the lighting unit 60 is inserted into the first storage portion 14 from below the first storage portion 14, and the lighting device 61 is fixed to the upper plate portion 15. May be. The lighting device 61 may be fixed to the side plate portion 16.

  The mounting plate 10 is attached to the ceiling surface 100 by fastening parts. 7 and 8 illustrate a mounting structure using, for example, bolts 91 and nuts 92 as fastening parts.

  The bolt 91 is attached to the ceiling or a structure fixed to the ceiling, and the lower end portion of the bolt 91 protrudes below the ceiling surface 100.

  A slit 101 is formed in the ceiling surface 100. The slit 101 extends in the same direction as the longitudinal direction of the first storage portion 14 (direction passing through the paper surface in FIG. 7). A pair of bolts 91 is provided across the slit 101.

  As shown in FIG. 2, a through hole 18 is formed in each of the pair of top plate portions 11 of the mounting plate 10. The bolt 91 is passed through the through hole 18. At this time, the 1st accommodating part 14 is inserted in the slit 101 formed in the ceiling surface 100, and is put into a ceiling back. As shown in FIG. 8, the top surface of the top plate portion 11 is in contact with the ceiling surface 100 and overlapped.

  The lower end portion of the bolt 91 protrudes below the top plate portion 11 through the through hole 18, and a nut 92 is coupled to the lower end portion as shown in FIG. The top plate portion 11 is attached to the ceiling surface 100 by the fastening force of the bolt 91 and the nut 92.

  As shown in FIG. 2, a through hole 17 is formed in the upper plate portion 15 of the first storage portion 14. The external wiring wired on the back of the ceiling is drawn into the first storage portion 14 through the through hole 17 and connected to the lighting device 61 via a connector (not shown).

  At this time, the light source holding plate 30 has not been attached to the mounting plate 10 yet. Therefore, the work of connecting the external wiring to the lighting device 61, the mounting operation of the lighting device 61 to the first storage portion 14, and the fastening operation of the nut 92 to the bolt 91 are not hindered by the light source holding plate 30.

  After the above operation is completed, the light source holding plate 30 is attached to the mounting plate 10. The light source holding plate 30 is detachably attached to the mounting plate 10. For example, a V-shaped spring is attached to one of the light source holding plate 30 and the mounting plate 10, and a latching portion for latching the V-shaped spring is provided on the other, and the V-spring is latched by the latching portion. The light source holding plate 30 is detachably attached to the attachment plate 10.

  Before the light source holding plate 30 is attached to the mounting plate 10, the substrate 51 of the light source 50 is screwed to the light source holding portion 31 of the light source holding plate 30, for example.

  Further, the wiring cable 62 connected to the lighting device 61 is connected to a connector (not shown) mounted on the substrate 51 of the light source 50, and the lighting device 61 is electrically connected to the light source 50. Alternatively, the wiring cable 62 may be connected to the light source 50 first, and the wiring cable 62 may be connected to the lighting device 61 when the light source holding plate 30 is attached.

  The second storage portion 35 of the light source holding plate 30 is stacked under the first storage portion 14 of the mounting plate 10, and the wiring cable 62 is stored in the space inside the second storage portion 35.

  By arranging the wiring cable 62 in a space below the lighting device 61, the wiring cable 62 is close to the hand without being hidden by the lighting device 61 for an operator who works from below the ceiling surface 100. It is easy to connect the cable 62 to the light source 50 or the lighting device 61.

  Further, as shown in FIG. 5, since the reflection plate 39 of the light source holding plate 30 is inclined with respect to the top plate portion 11, it does not collide with the bolt 91 and the nut 92, and the mounting plate 10, the reflection plate 39 and In the meantime, the accommodation space 21 for the bolt 91 and the nut 92 is secured. The reflection plate 39 is provided below the accommodation space 21 and covers the bolt 91 and the nut 92 from below the ceiling surface 100.

  According to the luminaire 1 of the embodiment described above, one of the upper side and the lower side as a storage unit for storing the lighting unit 60 on the basis of the top plate part 11 of the mounting plate 10 superimposed on the ceiling surface 100. The first storage portion 14 and the second storage portion 35 are provided so as to protrude in both directions without being biased.

  The entire lighting unit 60 may not be stored below the ceiling surface 100, and the protruding length of the lighting unit storage portion below the ceiling surface 100 can be suppressed. Conversely, it is not necessary to embed the entire lighting unit 60 in the back side of the ceiling surface 100, and the protruding length of the lighting unit storage portion to the back of the ceiling can be suppressed. As a result, the entire lighting fixture 1 can be thinned.

  By suppressing the protruding length of the lighting unit storage portion below the ceiling surface 100, it is possible to realize optical characteristics such that the lighting unit storage portion is less likely to be a shadow and the entire lower surface of the lighting fixture 1 is a light emitting surface.

  By suppressing the projection length of the lighting unit storage part to the back of the ceiling, the lighting fixture 1 can be placed on the ceiling surface without causing the lighting unit storage part to interfere with the structure of the back of the ceiling, even in places where the ceiling back space is limited. 100 can be attached.

  Further, although the light sources 50 are arranged along the Y direction, the reflective light source mounting surface 33, the reflecting plate 39 that is inclined with respect to the light source mounting surface 33, and the side wall portion 36 of the second storage portion 35. A uniform light-emitting surface can be realized by specular reflection and diffuse reflection.

  Moreover, the attachment plate 10 bears the attachment of the lighting fixture 1 to the ceiling surface 100, and the light source holding plate 30 is detachably attached to the attachment plate 10. Therefore, the lighting fixture 1 having a high degree of freedom in selecting optical characteristics and design properties can be obtained by replacing the light source holding plate 30 as necessary while maintaining the mounting strength of the lighting fixture 1 with respect to the ceiling surface 100 by the mounting plate 10. Can be provided.

  The mounting structure of the mounting plate 10 to the ceiling surface 100 is not limited to the mounting structure using the bolts 91 and the nuts 92, and the mounting plate 10 is mounted to the ceiling surface 100 using wood screws 95 as shown in FIG. May be.

  The wood screw 95 passes through the through hole 18 shown in FIG. 2 from below the top plate 11 and is screwed into the ceiling. Also in this case, since the reflection plate 39 of the light source holding plate 30 is inclined with respect to the top plate portion 11, the accommodation space 21 for the wood screw 95 is secured between the mounting plate 10 and the reflection plate 39. The reflection plate 39 is provided below the accommodation space 21 and covers the head of the wood screw 95 from below the ceiling surface 100.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Lighting fixture, 5 ... Appliance main body, 10 ... Mounting plate, 14 ... 1st accommodating part, 30 ... Light source holding plate, 33 ... Light source attaching surface, 35 ... 2nd accommodating part, 39 ... Reflecting plate, 50 ... Light source, 52 ... light emitting element, 60 ... lighting unit, 61 ... lighting device, 62 ... wiring cable

Claims (5)

An upper surface directed toward the ceiling surface, a light source mounting surface provided on the back side of the upper surface, a first storage unit protruding above the upper surface and provided on the back side of the ceiling surface, and the first storage unit An instrument body having a second storage portion protruding below the ceiling surface
A light source attached to the light source attachment surface of the instrument body;
A lighting unit housed in a space surrounded by the first housing portion and the second housing portion inside the first housing portion and the second housing portion, and lighting the light source A lighting unit having a lighting device to control, and a wiring cable connecting the lighting device and the light source;
Lighting equipment with The lighting device is housed on the upper side in the space,
The lighting fixture according to claim 1, wherein the wiring cable is housed below the lighting device in the space. The instrument body is
A mounting plate having the first storage portion and attached to the ceiling surface by a fastening component;
A light source holding plate having the light source mounting surface and the second storage portion and detachably attached to the mounting plate;
The lighting fixture according to claim 1 or 2, wherein:   The lighting fixture according to claim 3, wherein an accommodation space for the fastening component is formed between the mounting plate and the light source holding plate. The light source holding plate is
The lighting fixture according to claim 4, further comprising a reflector that is provided below the housing space of the fastening part, is inclined with respect to the light source mounting surface, and has reflectivity with respect to light emitted from the light source.

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