JP2015138636A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which efficiently transmits light of light emitting elements to a light guide plate.SOLUTION: A lighting device includes: a device body 10 including multiple LED elements 15b and an adapter attachment hole 11a with which an attachment adapter 100 is engaged; and a light guide cover body 31 which guides light of the multiple LED elements 15b. An opening part 31c is formed at a position of the light guide cover body 31 which corresponds to the attachment adapter 100. The lighting device includes: a lid part 41 which is inserted from the opening part 31c and covers the attachment adapter 100; and a light guide cap 42 which closes the opening part 31c, receives light from an emission part, and emits the light to the exterior.

Description

  The present invention relates to a lighting device including a plurality of light emitting elements as a light source.

  For example, in a ceiling lighting device (so-called ceiling light) equipped with a plurality of light emitting elements (LEDs), a technique for emitting light by causing light from the light emitting elements to enter a light guide plate has been proposed (see Patent Document 1). ).

JP 2013-239284 A

  However, in the illuminating device using the light emitting element and the light guide plate described in Patent Document 1, if the alignment between the light emitting element and the incident portion of the light guide plate is not accurate, optical loss due to light leakage, or light passing through the light guide plate There is a risk that light will not be guided.

  An object of this invention is to provide the illuminating device which can transmit the light of a light emitting element reliably to a light-guide plate.

  The present invention includes a device main body including a plurality of light emitting elements and an attachment hole that is locked to an adapter, and a light guide cover main body that covers the device main body and guides light of the plurality of light emitting elements, and the light guide The cover body is formed with an opening at a position corresponding to the adapter, inserted from the opening, covers the adapter, closes the opening, and receives light from the light guide cover body. And a light guide cap that emits light to the outside.

  ADVANTAGE OF THE INVENTION According to this invention, the illuminating device which can transmit the light of a light emitting element reliably to a light-guide plate can be provided.

It is an external appearance perspective view which shows the LED lighting apparatus which concerns on this embodiment. It is a disassembled perspective view which shows the LED lighting apparatus which concerns on this embodiment. It is the longitudinal cross-sectional view and A part enlarged view which show the LED lighting apparatus which concerns on this embodiment. It is a disassembled perspective view which shows a center cap. (A) is a top view of the center cap after an assembly | attachment, (b) is BB arrow sectional drawing of (a). It is the C section enlarged view of FIG. It is sectional drawing which shows a state when a center cap is mounted | worn with the apparatus main body.

  Hereinafter, an LED lighting device (LED ceiling light) according to an embodiment of the present invention will be described in detail with reference to the drawings. The LED lighting device 1 (lighting device) according to the present embodiment includes, for example, a mounting adapter 100 (adapter, which engages with an indoor wiring device (not shown) such as a hooking rosette or hooking ceiling provided on a ceiling surface of a house. 1), it is connected to an external power source and fixed at a predetermined position on the ceiling surface for use.

FIG. 1 is an external perspective view of the LED lighting device according to the present embodiment. FIG. 1 shows a state before the center cap 40 is attached. In FIG. 1, the upper side of the paper is the ceiling side, and the lower side of the paper is the floor side.
As shown in FIG. 1, the LED lighting device 1 is, for example, a round shape, and includes a device main body 10, a cover member 30, and a center cap 40. As described above, the LED lighting device 1 according to the present embodiment is used by attaching the center cap 40 after the device main body 10 to which the cover member 30 is fixed is attached to the attachment adapter 100 on the ceiling side.

FIG. 2 is an exploded perspective view of the LED lighting device according to the present embodiment.
As shown in FIG. 2, the apparatus main body 10 includes a main body base 11, an adapter receiving portion 12, a power supply board 13, a heat radiating plate 14, an LED light source board 15, an LED cover 16, and the like.

  The main body base 11 is a part formed by processing a steel plate (for example, SPCC) into a substantially circular shape, and is formed in a substantially concave shape so that the concave surface faces the floor side. An adapter mounting hole 11a (mounting hole) in which the mounting adapter 100 is mounted is formed at the center of the main body base 11 in the radial direction.

  A ring-shaped packing 11 b is bonded and fixed to the upper surface of the main body base 11. By sealing the gap between the main body base 11 and the ceiling surface by the packing 11b, it is possible to prevent dust and the like from entering the apparatus main body 10 from the outside.

  The adapter receiving portion 12 is formed of a flame-retardant synthetic resin (for example, PBT: polybutylene terephthalate resin), and is fixed to the main body base 11 with a ring-shaped fixing portion 12a and an inner peripheral edge portion of the fixing portion 12a. And a cylindrical portion 12b extending to the floor side (downward). The cylindrical portion 12b is formed with a plurality of locking portions 12c (two in this embodiment) where the center cap 40 described later is locked.

  The power supply board 13 includes a lighting circuit board and the like, and is fixed to the main body base 11 via an insulating plate (not shown). The insulating plate is formed of a resin material such as polypropylene having electrical insulating properties and flame retardancy. Further, the power supply board 13 is disposed in a heat dissipation space surrounded by the main body base 11 and a heat dissipation plate 14 which will be described later while maintaining electrical insulation.

  Moreover, the power supply board 13 is electrically connected to the mounting adapter 100 via an electric wire (not shown). As a result, the LED lighting device 1 is supplied with power through the indoor wiring device (not shown), the mounting adapter 100, and the power supply board 13, respectively.

  The heat radiating plate 14 is formed by processing a steel plate into a substantially circular shape, and is made of a metal having good thermal conductivity such as a galvanized steel plate. Further, the heat radiating plate 14 is formed to have a larger diameter than the main body base 11, and is fixed to the main body base 11 so as to protrude radially outward from the main body base 11.

  In addition, a circular through hole 14 a is formed at a position corresponding to the cylindrical portion 12 b of the adapter receiving portion 12 at the radial center of the heat radiating plate 14. Moreover, the heat sink 14 has the cylinder part 14b extended toward the ceiling side from the opening edge part of the through-hole 14a. Further, the heat radiating plate 14 is fixed to the main body base 11 with a part of the tip (upper end) of the cylindrical portion 14 b inserted into the cylindrical portion 12 b of the adapter receiving portion 12. Although not shown, the cylindrical portion 14b is formed so that a position corresponding to the locking portion 12c is cut away. Further, the heat dissipation plate 14 is increased in strength by applying a squeezing process.

  Further, the heat radiating plate 14 is provided with a highly reflective coating, and has a function of reflecting light traveling from the LED element 15b toward the ceiling to the floor. In addition, it may replace with the structure which gives highly reflective coating to the heat sink 14 and the structure which arrange | positions the reflective sheet which consists of a white resin sheet in the floor surface side of the heat sink 14 may be sufficient. By using the reflection sheet, the LED lighting device 1 can be manufactured at low cost.

  The LED light source board 15 includes a ring-shaped wiring board 15a and a plurality of LED elements 15b (light emitting elements) arranged in an annular shape on one surface side (floor surface side) of the wiring board 15a. Yes. The LED element 15b includes, for example, an element that emits white light and an element that emits warm light, and is configured by alternately arranging the elements in the circumferential direction. . As a result, light of three colors of light bulb color, light bulb color + daylight color, and daylight color can be emitted. Further, by adding a dimming mechanism to the LED element 15b, it becomes possible to radiate light of a finer color.

  The wiring board 15a is formed, for example, by forming an insulating layer and a copper foil pattern on a substantially annular metal plate made of an aluminum alloy, and a copper foil pattern and a copper plate on a flat plate of a resin having a good thermal conductivity (for example, a polyimide resin). It is configured by forming a solder resist or the like.

  By the way, the power supply board 13 and the LED light source board 15 described above generate heat when operated. In general, the LED element 15b, which is a semiconductor element, has a heat-sensitive property, and emits high-intensity light by flowing a large current at a low voltage during use. Therefore, the LED element 15b itself and surroundings are generated by heat generated by the light emission. The member deteriorates. In order to suppress such deterioration and realize a long life and high reliability, it is required to perform appropriate heat dissipation.

  In this embodiment, by providing the main body base 11 and the heat radiating plate 14 configured as described above, the volume of the heat radiating space is increased (the amount of air in the heat radiating space is increased), and the power supply board 13 and the LED light source board. The heat dissipation efficiency of 15 can be improved. As a result, the luminous efficiency of the LED element 15b can be increased.

  The LED cover 16 is formed in an annular shape so as to cover the entire LED light source substrate 15. The LED cover 16 is formed in a film shape from a colorless and transparent synthetic resin (for example, PET: polyethylene terephthalate resin). Further, the LED cover 16 is fixed to the outer periphery of the heat radiating plate 14 together with the LED light source substrate 15 via screws (not shown).

  Although not shown, the LED lighting device 1 may be provided with a security light. The security light can be configured, for example, by arranging a warm color LED element (not shown) in the vicinity of the LED element 15b.

  The cover member 30 includes a light guide cover main body 31, a ring cover 32, and a center cap 40.

  The light guide cover main body 31 has a function of guiding the light emitted from the plurality of LED elements 15b to the floor side, and a function as a cover of the LED lighting apparatus 1 disposed on the outermost side (floor side) of the LED lighting apparatus 1. And have. Thus, by arranging the light guide cover body 31 on the outermost side, the performance of the LED element 15b can be utilized to the maximum extent.

  The light guide cover main body 31 is integrally formed by injection molding or the like using a resin having translucency and electrical insulation made of, for example, PMMA (polymethyl methacrylate resin). In addition, the material of the light guide cover main body 31 is not limited to PMMA, as long as it has translucency and electrical insulation, and may be other resins such as polystyrene resin and polycarbonate resin, Moreover, it is not limited to resin, Glass etc. may be sufficient.

  The light guide cover main body 31 has a light guide plate 31a formed in a dish shape so that the concave surface faces the ceiling, and a flange portion (bump portion) 31b formed along the outer periphery of the light guide plate 31a. Configured. Further, a circular opening 31c penetrating in the vertical direction (ceiling side floor side) is formed at the radial center of the light guide plate 31a. The opening 31c is formed at a position corresponding to the mounting adapter 100, that is, a position where the mounting adapter 100 exposed from the apparatus main body 10 installed on the ceiling through the opening 31c can be seen.

  In the collar portion 31b, screw insertion holes 31d for screwing the light guide plate 31a to the heat radiating plate 14 are formed at a plurality of positions at intervals in the circumferential direction. The collar portion 31b is formed with a plurality of notches 31e having a concave shape at positions not overlapping the screw insertion hole 31d.

  The ring cover 32 is arranged so as to overlap under the flange portion 31b (floor side) of the light guide plate 31a so that the entire flange portion 31b including the screw insertion hole 31d and the notch 31e cannot be seen from the floor side. belongs to. For example, by painting the ring cover 32 with a light-shielding material (for example, silver), it is possible to make the collar portion 31b inconspicuous due to light and dark when the LED lighting device 1 is turned on. Note that the ring cover 32 may be milky white so as to emit light uniformly so that light can be used effectively.

  The ring cover 32 is formed with a protrusion 32a protruding upward (toward the ceiling) at a position corresponding to the notch 31e. As a result, the ring cover 32 can be attached to the light guide cover main body 31 by fixing the protrusion 32a to the notch 31e by bonding or the like after the light guide cover main body 31 is screwed to the heat sink 14.

FIG. 3 is a longitudinal sectional view and an enlarged view of a portion A showing the LED lighting device according to the present embodiment.
As shown in FIG. 3, a plurality of grooves 31f are concentrically formed on the inner surface of the light guide plate 31a. Thus, by forming the groove 31f on the inner surface of the light guide plate 31, dust and the like can be prevented from accumulating in the groove 31f, and light can be emitted stably.

  The groove 31f is formed from the outer periphery of the light guide plate 31a to the vicinity of the opening 31c. Thereby, the light of the LED element 15b can be emitted from the entire surface of the light guide plate 31a. Although not shown, each groove 31f is further subjected to graining. Thereby, the light in the groove 31f can be diffused.

  As shown in the enlarged view of the A part of FIG. 3, the light guide plate 31a is disposed opposite to the LED element 15b and guides the light incident on the incident part 31i and the incident part 31i where the light of the LED element 15b is incident. And an emission part 31o that guides and emits light toward the center of the optical plate 31a.

  The incident portion 31i is a portion corresponding to a range T corresponding to the thickness of the light guide plate 31a, and is formed in an annular shape along the array of the LED elements 15b. The arrangement of the LED elements 15b is not limited to an annular shape, and may be arranged in other shapes such as a quadrangular shape and a pentagonal shape.

  By the way, if the LED element 15b and the incident portion 31i are not properly positioned, an optical loss may occur and light may not be guided to the light guide plate 31a. For this reason, positioning of the LED element 15b and the incident part 31i becomes important.

  The emitting portion 31o includes a curved portion 31o1 extending from the incident portion 31i toward the floor, and a flat plate portion 31o2 formed continuously from the curved portion 31o1 and formed in a disk shape in the horizontal direction. Have. When the light from the LED element 15b is incident from the incident portion 31i, the light is emitted to the outside (floor side) of the light guide plate 31a while being guided to the emitting portion 31o.

FIG. 4 is an exploded perspective view showing the center cap.
As shown in FIG. 4, the center cap 40 includes a lid portion 41 that covers the mounting adapter 100 (see FIG. 2), and a light guide cap 42 that closes the opening 31 c formed in the light guide plate 31 a. Has been.

  The lid portion 41 includes a disc portion 41a and a cylindrical portion 41b extending from the peripheral portion of the disc portion 41a to the ceiling side.

  Grooves 41c and 41c extending in the vertical direction are formed on the outer peripheral surface of the cylindrical portion 41b. The grooves 41c and 41c are arranged so as to face each other across the radial center of the disc portion 41a. The upper end 41c1 and the lower end 41c2 of each groove 41c are open upward and downward.

  The cylindrical portion 41b is formed with a pair of claw portions 41d and 41d. The claw portions 41d and 41d are arranged to face each other at a position different from the groove 41c across the center in the radial direction of the disc portion 41a. Further, the tip of the claw portion 41d protrudes radially outward from the outer peripheral surface 41b1 of the cylindrical portion 41b. The claw portion 41d is formed on the cylindrical portion 41b so as to be elastically deformable in the radial direction.

  The light guide cap 42 has a disc portion 42a and a cylindrical portion 42b extending from the peripheral portion of the disc portion 42a to the ceiling side.

  The disc portion 42a is formed with a collar portion 42c that protrudes radially outward from the cylindrical portion 42b. When the center cap 40 is attached to the apparatus main body, the collar portion 42c comes into contact with the peripheral edge portion of the opening 31c so that the insertion of the center cap 40 into the opening 31c is restricted.

  Locking protrusions 42d and 42d having an L shape in a side view are formed on the upper end portion of the cylindrical portion 42b so as to protrude upward. The locking protrusions 42d and 42d are disposed so as to face each other across the radial center of the disc portion 42a. Further, the distal end portion 42d1 of the locking projection 42d protrudes radially outward from the outer peripheral surface 42b1 of the cylindrical portion 42b.

  Further, a locking hole 42e for locking the claw portion 41d of the lid portion 41 is formed in the cylindrical portion 42b below the locking projection 42d. FIG. 4 shows one locking hole 42e, and FIG. 5B shows both locking holes 42e.

Fig.5 (a) is a top view of the center cap after an assembly | attachment, (b) is BB arrow sectional drawing of (a).
As shown in FIG. 5A, the outer diameter of the cylindrical portion 41b of the lid portion 41 is formed slightly smaller than the inner diameter of the light guide cap 42, and the lid portion 41 is inserted into the cylindrical portion 42b of the light guide cap 42. It is configured to be possible. At this time, the protrusion 42 f of the light guide cap 42 is inserted so as to be positioned in the groove 41 c of the lid 41. Thereby, the rotation operation within the light guide cap 42 of the lid portion 41 is restricted, and the claw portion 41d can be easily inserted into the locking hole 42e (see FIG. 5B). When the lid portion 41 is inserted along the inner wall surface of the cylindrical portion 42b of the light guide cap 42, the claw portion 41d is inserted while being elastically deformed, and the tip of the claw portion 41d is positioned in the locking hole 42e. In addition, the claw portion 41d is elastically restored and the tip portion is inserted into the locking hole 42e, whereby the lid portion 41 is held (integrated) by the light guide cap 42. The center cap 40 is provided to the user in a state where the lid portion 41 and the light guide cap 42 are assembled in advance.

6 is an enlarged view of a portion C in FIG. 2, and FIG. 7 is a cross-sectional view showing a state in which the center cap is locked to the apparatus main body.
As shown in FIG. 6, the latching | locking part 12c is formed in the inner peripheral wall surface 12d of the lower end part of the cylindrical part 12b. That is, the latching | locking part 12c has the frame part 12e formed in a front view U-shape. The frame portion 12e includes a horizontal portion 12e1 extending along the circumferential direction and vertical portions 12e2 and 12e2 extending downward from both ends in the circumferential direction of the horizontal portion 12e1. The lower end of the vertical part 12e2 coincides with the lower end of the cylindrical part 12b.

  Further, the frame portion 12e is formed to be wide in the circumferential direction, and a protruding portion 12f that protrudes radially inward from the inner peripheral wall surface 12d is formed in the frame portion 12e on a substantially half side in the circumferential direction. Moreover, the cylindrical part 12b located in the horizontal part 12e1 and the protrusion part 12f is formed with a rectangular through hole 12g penetrating in the radial direction. An insertion portion 12h through which the locking projection 42d is inserted is formed between the projection 12f and one vertical portion 12e2.

  When attaching the center cap 40 to the apparatus main body 10, first, the apparatus main body 10 is fixed to an attachment adapter 100 attached to the ceiling side (see FIG. 1). Then, a power line extending from the apparatus main body 10 is connected to the mounting adapter 100. Then, the center cap 40 is inserted from the opening 31c with the locking projection 42d facing upward (see FIGS. 2 and 3). At this time, the position of the locking protrusion 42d and the position of the insertion part 12h of the locking part 12c are matched in the vertical direction. And 42 d of latching protrusions are penetrated from the lower side to the insertion part 12h (refer FIG. 6) of the latching | locking part 12c (S1 direction of FIG. 6). Then, by rotating the center cap 40 in the direction S2 in FIG. 6, the locking projection 42d moves to the projection 12f side. As a result, as shown in FIG. 7, the distal end portion 42d1 of the locking projection 42d is positioned above the protruding portion 12f, so that the locking projection 42d is elastically returned to the outside in the radial direction, and the distal end of the locking projection 42d. The part 42d1 is inserted into the through hole 12g. Thereby, the center cap 40 is locked to the apparatus main body 10 (cylindrical part 12b). As described above, the tip 42d1 of the locking protrusion 42d is inserted into the through hole 12g, so that the center cap 40 can be prevented from rotating backward and dropping off from the apparatus main body 10.

  Further, as shown in FIG. 7, since the outer peripheral end surface 42a1 of the disc portion 42a of the light guide cap 42 is in a position facing the end surface 31c1 of the opening 31c, the light from the light guide plate 31a is transmitted to the light guide cap. 42 can be introduced efficiently (with little optical loss). As a result, the light guide cap 42 at the center can emit light substantially equal to the light guide plate 31a on the outside.

  Further, when removing the center cap 40, by rotating the center cap 40 in the direction opposite to the S2 direction in FIG. 6, the locking projection 42d is detached from the through hole 12g while being elastically deformed radially inward, The locking projection 42d moves from the projection 12f side to the insertion portion 12h side. By moving the locking projection 42d to the position of the insertion portion 12h, the center cap 40 comes out of the opening 31c by the action of its own weight and gravity.

  Thus, in this embodiment, in the LED lighting device 1 in which the light guide plate 31a is located on the outermost side, the opening 31c is formed at the center of the light guide plate 31a, so that the device main body 10 and the cover member 30 are screwed or the like. The LED element 15b on the apparatus body 10 side and the incident portion 31i of the light guide plate 31a can be reliably positioned. Further, the lid 41 can cover the mounting adapter 100 and the wiring cable, and the light guide cap 42 can receive the light from the emitting portion 31o and also cause the light guide cap 42 to shine. It becomes possible to shine the whole from the outside of the direction to the center (a central portion can be prevented from being darkened).

  Further, in the present embodiment, the center cap 40 can be attached to the apparatus main body 10 with the lid portion 41 held by the light guide cap 42, so that the light guide cap 42 and the lid portion 41 are attached separately. , Installation work can be simplified. Further, when the LED lighting device 1 is used, it is possible to prevent a problem that only the lid portion 41 falls off from the device main body 10.

  In the present embodiment, the lid portion 41 is held so as to be accommodated in the cylindrical portion 42b of the light guide cap 42 (see FIG. 3), thereby reducing the thickness of the light guide plate 31a in the vertical direction (vertical direction). Therefore, the LED lighting device 1 can be thinned.

  In addition, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning of this invention, it can change variously. For example, in the above-described embodiment, the configuration in which the lid portion 41 is held by the light guide cap 42 (in an integrated state) and attached to the apparatus main body 10 is described as an example. Even if it is the structure which locks the light guide cap 42 to the locking part formed in the cover part 41 after attaching the cover part 41 first, without providing the mechanism which integrates the cover part 41, for example. Good.

  Further, the shape of the LED lighting device 1 is not limited to a round shape, and may be other shapes such as a square shape such as a square, and a polygonal shape.

1 LED lighting device (lighting device)
10 Device Body 11 Body Base 11a Adapter Mounting Hole (Mounting Hole)
12 Adapter receiving part 13 Power supply board 14 Heat sink 15 LED light source board 15b LED element (light emitting element)
16 LED cover 30 cover member 31 light guide cover main body 31a light guide plate 31b collar portion 31c opening 31c1 end face 31e notch 31i incident portion 31o exit portion 32 ring cover 40 center cap 41 lid portion 42 light guide cap 42a disc portion (plate) Part)
42a1 end face 42b cylindrical part (cylinder part)

Claims (4)

An apparatus body including a plurality of light emitting elements and an attachment hole to be locked to the adapter;
A light guide cover body that covers the apparatus body and guides light of the plurality of light emitting elements, and
In the light guide cover body, an opening is formed at a position corresponding to the adapter,
A lid that is inserted from the opening and covers the adapter;
A lighting device comprising: a light guide cap that closes the opening and receives light from the light guide cover body and emits the light to the outside.   The lighting device according to claim 1, wherein the light guide cap is attached to the apparatus main body while holding the lid. The light guide cap has a cylindrical portion,
The lighting device according to claim 2, wherein the lid portion is held in the tube portion. The light guide cap has a plate portion that closes the opening,
4. The lighting device according to claim 1, wherein an end surface of the plate portion is disposed to face an end surface of the opening. 5.

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