JP2013225452A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of preventing invasion of winged insects into a cover without need of any special member and special process, and securing excellent illumination quality.SOLUTION: A lighting device, in which a peripheral edge of a cover 3 is fixed engaged with an externally fitted ring 21 forming an outer edge of a platy retainer for retaining a light source on one face, has a rib 21b around an end part of the externally fitted ring 21, so that the rib 21b is deformed as it is pressure-contacted to a flat part 32b of the cover 3 to fill gaps generated at an engagement part of the externally fitted ring 1 and the cover 3.

Description

  The present invention relates to an illumination device configured by attaching a cover to a plate-like holding body that holds a light source on one surface so as to cover the one surface.

  In recent years, a ceiling light that is directly attached to a ceiling surface and used as a lighting device for a living room has become widespread. The ceiling light includes a plate-like holding body that holds the light source on one surface, and a cover that is attached to the holding body so as to cover the one surface, and the holding light is separately attached to the fixing frame provided on the ceiling surface of the living room. The body is fixed, the peripheral edge of the cover is engaged with the outer edge of the holding body and attached, and the holding surface of the light source facing downward by the cover is covered.

  As a light source, a fluorescent tube is widely used, but in recent years, a ceiling light using a solid light emitting element such as an LED (light emitting diode) as a light source has been commercialized. The cover is a resin molded product having light diffusibility, and is configured so that the light emitted from the light source is diffused by the cover and emitted to the outside to illuminate the living room.

  In the ceiling light configured in this way, there is an inevitable gap in the engaging portion between the holding body and the cover, so that the beetle attracted by the light emission of the light source enters the inside of the cover through this gap. There is a problem. If a worm enters the cover, it will be visually recognized from outside the cover as a shadow that blocks the light emission of the light source, and the appearance will deteriorate, and the light emitted to the outside will decrease, resulting in a decline in illumination quality. .

  In order to cope with this problem, in general, a ring-shaped seal member is interposed in the engaging portion between the holding body and the cover, and the gap between the engaging portions is filled with the seal member to prevent the insects from entering. In the lighting device disclosed in Patent Document 1, a fluff layer is formed on one of the holding body and the cover, and the fluff layer is brought into contact with the other in the vicinity of the engaging portion. To prevent the intrusion.

JP 2009-99337 A

  However, in the configuration in which the seal member is interposed, a seal member as a separate member is necessary, which causes an increase in product cost due to an increase in the number of parts, and the user covers for internal inspection including replacement of the light source. When attaching / detaching, there is a possibility that the seal member may be damaged or lost, and the original intrusion prevention effect may not be obtained.

  On the other hand, in the configuration of Patent Document 1, since there are slight gaps between the hairs constituting the flocked layer, it is difficult to obtain the same invasion preventing effect as that of the sealing member described above, and the flocked layer is provided on the support or cover. A process for forming (floky process) is required separately, and there is a problem in that the productivity is lowered and the product cost is increased due to the addition of this process.

  The present invention has been made in view of such circumstances, and it is possible to effectively prevent the invasion of worms into the cover without requiring dedicated members and processes, and good illumination over a long period of time. It aims at providing the illuminating device which can ensure quality.

  An illumination device according to the present invention includes a light source, a plate-like holding body that holds the light source on one surface, and a cover that is attached with a peripheral edge engaged with an outer edge of the holding body and covers the one surface. The illumination device includes a rib that is provided around one of an outer edge of the holding body and a peripheral edge of the cover and is deformed by being pressed against an engaging portion with the other.

  In the present invention, a rib is provided around one of the outer edge of the holding body and the peripheral edge of the cover that are engaged with each other when the cover is attached. The rib is deformed by being pressed against the engaging portion when engaged with the other, and closes the gap existing in the engaging portion, thereby preventing the insects from entering the cover through the gap. A rib can be provided by integral molding with a holding body or a cover, and a dedicated member or process is not required. Since the deformation of the rib occurs in accordance with the shape of the pressed portion when the holding body and the cover are engaged, it is possible to reliably close the gap existing in the engaging portion and effectively prevent the insects from entering. .

  The lighting device according to the present invention is characterized in that a plurality of the ribs are arranged side by side.

  In the present invention, ribs are arranged in a plurality of rows on one of the outer edge of the holding body and the peripheral edge of the cover, and these ribs are deformed by pressure contact with the other to multiplex the gaps existing in the engaging portion. To prevent the invasion of worms.

  Moreover, the illuminating device which concerns on this invention has the said engaging part has a flat part press-contacted to the said rib.

  In the present invention, the rib is pressed against the flat portion provided in the engaging portion, and the rib is reliably deformed to close the gap of the engaging portion, thereby preventing the insects from entering more effectively.

  Moreover, the illumination device according to the present invention is characterized in that the holding body includes a mounting part for a peripheral component that is optically isolated from the light source at a central portion of one surface that holds the light source. .

  In the present invention, a mounting part for a peripheral component is provided at the center of one surface of the holding body that holds the light source, the mounting part and the light source are optically isolated, and the light emitted from the light source is arranged around the mounting part. There is no possibility that the projected image of the peripheral part appears on the cover without hitting the part and the projected image of the peripheral part appears on the cover, resulting in a decrease in illumination quality. Peripheral components include a power source circuit for the light source, a circuit board including a control circuit, a connecting member for connecting the circuit board to a commercial power source, and a fixing member for fixing the holding body to the ceiling surface.

In the lighting device according to the present invention, the rib provided on one of the outer edge of the holding body and the peripheral edge of the cover that are engaged with each other is deformed by pressure contact with the other to close the gap of the engaging portion. The present invention has excellent effects such that it is possible to prevent the invasion of worms without requiring dedicated members and processes, and it is possible to ensure good illumination quality over a long period of time with a simple configuration. Play.

It is a disassembled perspective view of the illuminating device which concerns on embodiment. It is a longitudinal cross-sectional view which shows the half part of the illuminating device which concerns on embodiment. It is a top view of a holding body. It is an expanded sectional view of the engaging part of an exterior ring and a cover. It is explanatory drawing of the shaping | molding method of an exterior ring. It is sectional drawing which shows other embodiment of an armor ring.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 1 is an exploded perspective view of the lighting device according to the embodiment, and FIG. 2 is a longitudinal sectional view showing a half part of the lighting device according to the embodiment. The lighting device includes a light source 1, a plate-like holding body 2 that holds the light source 1 on one surface, and a cover 3 that is attached to the holding body 2 so as to cover the holding surface of the light source 1.

  As shown in FIG. 2, the holding body 2 is configured by attaching an annular outer ring 21 to the outer periphery of a disk-shaped chassis 20. FIG. 3 is a plan view of the holding body 2. As shown in the figure, the chassis 20 includes a mounting hole 22 formed in the center, a support ring 23 formed in a double circular shape with the outside of the mounting hole 22 protruding to one surface side, and an outer peripheral portion. And a flange part 24 formed by bending so as to project obliquely toward the one surface side. Such a chassis 20 can be manufactured in one step by molding a metal plate such as a steel plate or an aluminum plate.

  The outer ring 21 is a resin molded product having a property of diffusing and transmitting light, such as polycarbonate resin. As shown in FIG. And fixed at a plurality of locations (see FIG. 3) to constitute the outer edge of the holding body 2.

  The light source 1 is an LED light source configured by mounting a plurality of LEDs 11 on one surface of a strip-shaped substrate 10 as shown in FIG. 1, and a flattened chassis between a support ring 23 and a flange 24. A plurality of (eight in the figure) LEDs 10 are arranged with the mounting surface of the LED 11 facing the longitudinal direction of the substrate 10 on the circumference concentric with the chassis 20 and the LED 11 mounting surface facing outward. 2). The light source 1 is not limited to the illustrated LED light source, and may be another light source such as a ring-shaped fluorescent tube.

  The double support ring 23 provided on the chassis 20 is used as a mounting seat for the circuit board 4. As shown in FIG. 1, the circuit board 4 is a flat plate formed in an annular shape, and circuit components constituting a power supply circuit and a control circuit for the light source 1 are mounted on one surface thereof. The circuit board 4 has an outer periphery overlapped with the outer support ring 23 and fixed with a set screw 27 (see FIG. 2), and an inner periphery is overlapped with the inner support ring 23 via an adapter ring 40 to support the inner and outer sides. The mounting surface of the circuit component is attached outward so as to span between the rings 23.

  The circuit board 4 attached in this way is connected to the board 10 constituting the light source 1 by wiring (not shown) along the bottom surface of the chassis 20. An insulating sheet 41 having an annular shape is attached to the entire surface of the flat portion between the inner and outer support rings 23 to ensure insulation between the circuit board 4 and the chassis 20.

  The outer support ring 23 is also used as a mounting seat for the shield 42. The shield 42 is a ring made of a conductive metal having the cross-sectional shape shown in FIG. 2, and the outer periphery is fixed to the outer support ring 23 in an overlapping manner, and the circuit is formed by an extension that rises obliquely inward. It is attached so as to cover the mounting surface of the substrate 4 with an appropriate distance. The shield 42 attached in this way electromagnetically shields the circuit board 4 from the external environment, and serves to prevent malfunction of the circuit on the circuit board 4. The shield 42 also functions as a support member that supports the inner periphery of the cover 3 and the reflection sheet 12 as described later.

  The reflection sheet 12 is a resin sheet having a trapezoidal cross section in which the entire lower bottom side is open as shown in FIG. 2, and formed in a wide ring shape as shown in FIG. The reflection sheet 12 has an upper base along the bottom surface of the chassis 20 to which the light source 1 is attached (a flat portion between the support ring 23 and the flange 24) and is fastened together with the substrate 10 by the set screw 26 described above. The outer hypotenuse is aligned with the inner surface of the flange portion 24 of the chassis 20 and fixed to the chassis 20 together with the outer ring 21 by the set screw 25 described above. Further, the oblique side on the inner side of the reflection sheet 12 extends so as to surround the mounting portion of the shield 42 described above, and the inner peripheral edge of the oblique side is fixed to the top portion of the shield 42 together with a cover 3 described later by a set screw 28. .

  A window hole is formed in the reflection sheet 12 according to the mounting position of each of the plurality of LEDs 11 on the substrate 10 constituting the light source 1. The LEDs 11 mounted on the plurality of substrates 10 are exposed through corresponding window holes as shown in FIG. 2, and these exposed portions are covered with a diffusion lens 13. As shown in FIG. 1, the diffusing lens 13 is a resin lens formed in an annular shape so as to correspond to the arrangement circumference of the LEDs 11 on the bottom surface of the chassis 20, and collects all the LEDs 11 exposed from the reflective sheet 12. It is attached to cover.

  The illumination device is configured by covering the mounting surface of the light source 1 of the chassis 20 configured as described above with a cover 3. The cover 3 is a resin disc having a property of diffusing and transmitting light such as polycarbonate resin, and has a cross-sectional shape curved with a large curvature as shown in FIG. 2 and is slightly larger than the outer ring 21. It has an outer diameter.

  A circular opening 30 is formed at the center of the cover 3, and a circular engagement recess 31 is formed at the peripheral edge of the opening 30 so as to be recessed toward the center of curvature of the cover 3. The outer peripheral edge of the cover 3 is integrally formed with an engagement protrusion 32 that rises toward the center of curvature, and the cover 3 engages the outer peripheral engagement protrusion 32 with the outer ring 21 from the outside, while the inner peripheral engagement The joint recess 32 is overlapped on the top of the shield 42 and fixed together with the reflection sheet 12 by the set screw 28 described above, so that the entire bottom surface of the chassis 20 holding the light source 1 is covered.

  A center cover 33 is detachably mounted in the engagement recess 31 at the center of the cover 3. The center cover 33 is a resin molded product having a disk shape substantially the same diameter as the engagement recess 31, and is fitted into the engagement recess 33 and attached so as to cover the opening 30 as shown in FIG. 2.

  A feature of the lighting device according to the embodiment is an engagement structure between the outer ring 21 constituting the outer edge of the holding body 2 and the peripheral edge of the cover 3. FIG. 4 is an enlarged cross-sectional view of the engaging portion between the outer ring 21 and the cover 3. As shown in this figure, the engaging protrusion 32 erected on the peripheral edge of the cover 3 is provided with an engaging claw 32 a that has its tip bent at a substantially right angle and extends inward in the radial direction of the cover 3. The cover 3 is provided with a flat portion 32b that is substantially parallel to the engaging claw 32a at the peripheral edge where the engaging protrusion 32 rises.

  The outer ring 21 has an umbrella-like shape that covers the outer edge of the flange portion 24 of the chassis 20 by being bent toward the attachment side of the cover 3. The outer ring 21 is provided with an engagement flange 21a projecting radially outward from the outer peripheral surface, and the cover 3 has an engagement flange 21a between the engagement claw 32a and the flat portion 32b. It is held and engaged with the outer ring 21. In this engagement, the outer ring 21 and the cover 3 are aligned, the engagement claw 32a at the tip of the engagement protrusion 32 is brought into contact with the outer edge of the engagement flange 21a, and the periphery of the cover 3 is brought into contact with the outer ring 21. By being pushed in, it is realized with elastic deformation of the resin outer ring 21 and the engaging projection 32.

  On the end surface of the outer ring 21 that contacts the flat portion 32b of the cover 3 by this engagement, a rib 21b is provided on the entire inner periphery, and the rib 21b is formed on the flat portion 32b as shown in FIG. It is crushed and deformed by being pressed, and acts to close the gap between the outer ring 21 and the cover 3. Further, due to the reaction of the deformation of the rib 21b, the engagement flange 21a is pushed in a direction away from the cover 3 and comes into close contact with the engagement claw 32a, and the gap in this portion is effectively blocked.

  FIG. 5 is an explanatory diagram of a method for forming the outer ring 21. The resin-made outer ring 21 is manufactured by combining the upper mold 6 and the lower mold 7 indicated by a two-dot chain line in the drawing, and injecting and solidifying the resin at the joint portion between the two. The rib 21b provided as described above comprises an inner mold 70 and an outer mold 71 in which the lower mold 7 for molding the same side surface can be separated at the circumferential position of the rib 21b, and the outer mold 21 is in contact with the outer periphery of the inner mold 70. By providing chamfers 72 at the corners of the mold 71, the mold 71 can be easily and accurately molded.

  As shown in FIG. 2, the lighting device configured as described above is used with the holding body 2 fixed to the ceiling surface 5 of the living room so that the mounting surface of the light source 1 faces downward. The holding body 2 is fixed by, for example, fitting a mounting hole 22 in the center of the chassis 20 into a fixing frame 50 separately provided at a corresponding position on the ceiling surface 5, and engaging a fixing tool 51 with the frame 50. This is realized by holding the peripheral edge of the mounting hole 22 between the frame body 50 and the fixture 51. The holding body 2 can be removed by releasing the engagement of the fixture 51.

  The center cover 33 is removed when the holder 2 is attached or detached. The engagement and disengagement operations of the fixing tool 51 can be performed from the opening 30 opened by removing the center cover 33. The center cover 33 is mounted after the holding body 2 is fixed, closes the opening 30, and prevents peripheral components including the frame body 50, the fixture 51, the shield 42, the circuit board 4 and the like from being seen from the outside. .

  The fixture 51 also serves as a connector for connecting the circuit board 4 to a commercial power supply via the adapter ring 40. The power supply circuit and the control circuit on the circuit board 4 are operated by operations of a remote controller, a wall switch, etc. The LED 11 on the substrate 10 held by the holding unit 2 emits light. Light emitted from the LED 11 is diffused by the diffusing lens 13, reflected by the reflection sheet 12, spreads throughout the entire interior of the holding body 2, passes through the cover 3, and is emitted outside to illuminate the living room. As described above, the cover 3 is made of resin having the property of diffusing and transmitting light, and the light emitted from the light source 1 is emitted over the entire surface of the cover 3 so that the living room can be well illuminated.

  As described above, the exterior ring 21 that borders the outer periphery of the chassis 20 is made of resin having the property of diffusing and transmitting light, and part of the light emitted from the light source 1 illuminates the ceiling surface 5 through the exterior ring 21. There is no possibility that the shadow of the holding body 2 projected onto the surface 5 will be visually recognized by the user in the room, and good illumination quality can be ensured.

  Peripheral components such as the frame 50, the fixture 51, the shield 42, and the circuit board 4 are attached to the central portion of the chassis 20, and this attachment portion is attached to the light source 1 by the reflection sheet 12 provided as described above. It is optically isolated. Therefore, the light emitted from the light source 1 is emitted to the outside without hitting the peripheral component, and there is no possibility that the projection image of the peripheral component appears on the cover 3 and the illumination quality deteriorates. As described above, the circuit board 4 and the light source 1 are connected by wiring along the bottom surface of the chassis 20, and these wirings are also covered with the reflection sheet 12, so that a projected image of the wiring may appear on the cover 3. Nor.

  In the illumination device of the embodiment, the rib 21b provided on the outer ring 21 is provided on the cover 3 as described above at the engaging portion between the outer ring 21 constituting the outer edge of the holding body 2 and the peripheral edge of the cover 3. Since it is pressed against the flat portion 32b and is crushed and deformed, and the gap inevitably generated in the engaging portion between the outer ring 21 and the cover 3 is closed, the beetles attracted by the light emission of the light source 1 enter the cover 3. It can be surely prevented and good illumination quality can be ensured.

  The rib 21b having the above-described function can be integrally formed with the outer ring 21 by a simple improvement of the mold (lower mold 7) in the molding process of the resin outer ring 21, and prevents the insects from entering. The original object can be realized by a simple configuration that does not use a seal member as a separate member and does not require a separate process.

  Further, since the rib 21b provided on the outer ring 21 is pressed against the flat portion 32b provided on the cover 3, the rib 21b is deformed under uniform conditions over the entire circumference of the outer ring 21, and the engaging portion It is possible to more reliably block the gap in the gap.

  FIG. 6 is a cross-sectional view showing another embodiment of the outer ring 21. The outer ring 21 includes ribs 21b arranged in three rows in the radial direction on the end surface that should come into contact with the flat portion 32b when the cover 3 is attached. Since these ribs 21b are crushed and deformed by pressure contact with the flat portion 32b and close the gap between the outer ring 21 and the cover 3 at each position, a triple barrier is formed between the inside and outside of the cover 3. In this case, it is possible to more reliably prevent the insects from entering the cover 3. The number of ribs 21b arranged in parallel is not limited to the three shown in the figure, and may be two, or four or more if provided within the end face of the outer ring 21. Good.

  In the above embodiment, the rib 21b is provided on the end surface of the exterior ring 21, and the rib 21b is configured to be deformed by being pressed against the flat surface 32b of the cover 3. On the contrary, It goes without saying that a rib may be provided on the side 3 and the rib may be deformed by pressure contact with the outer ring 21.

DESCRIPTION OF SYMBOLS 1 Light source 2 Holder 3 Cover 21 Exterior ring 21b Rib 32b Flat part

Claims (4)

In a lighting device comprising: a light source; a plate-like holding body that holds the light source on one surface; and a cover that is attached with a peripheral edge engaged with an outer edge of the holding body and covers the one surface.
An illuminating device comprising a rib that is provided around one of an outer edge of the holding body and a peripheral edge of the cover and is deformed by being pressed against an engaging portion with the other.   The lighting device according to claim 1, wherein a plurality of the ribs are arranged side by side.   The lighting device according to claim 1, wherein the engaging portion includes a flat portion that is pressed against the rib.   The said holding body is equipped with the attachment part of the peripheral component provided in the center part of the one surface holding the said light source so that it was optically isolated with respect to the said light source. Lighting equipment.

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