JP5158456B2 - lighting equipment - Google Patents

Description

  Embodiments described herein relate generally to a lighting fixture using a light emitting element such as an LED as a light source.

  Conventionally, for the purpose of power saving in offices and living spaces, the illuminance sensor detects the illuminance of the surrounding environment and automatically controls the light output from fluorescent lamps and LEDs to maintain a substantially constant illuminance. Instruments are known.

  In these appliances used in offices and homes, there is a risk of malfunction caused by receiving light emitted from the main light source, so it is difficult to receive light from the main light source or cover members that cover the main light source. It protruded from the outer frame and the irradiation surface.

JP 2010-978899 A

  However, in the case of the above luminaires, even if the design of the luminaire is improved, the light receiving part such as the illuminance sensor and the human sensor protrudes from the cover member frame. Problems such as being restricted.

  This invention is made | formed in view of the said subject, and it aims at providing the lighting fixture with a sensor which can suppress deteriorating the designability in the lighting fixture provided with the sensor.

Luminaire according to an embodiment of the present invention, main body and having a mounting portion that is attached to the installed wiring accessories to the instrument mounting surface; having a white reflective layer; lighting device and disposed on the outer peripheral side of the mounting portion A substrate having a mounting surface directed toward the front surface and having a back surface disposed on the main body so as not to overlap the lighting device outside the lighting device; a plurality of light emitting elements mounted on the substrate along a circumferential direction; A sensor that is an area surrounded by the light emitting element and disposed between the mounting portion and the light emitting element; and a cover member that is attached to the main body and covers the light emitting element and the sensor. .

  According to the embodiment of the present invention, it is possible to provide a lighting fixture in which a sensor is provided in a translucent cover member without impairing the fixture design.

It is a perspective view which shows the lighting fixture which concerns on embodiment of this invention. It is a disassembled perspective view which shows the same lighting fixture. It is sectional drawing which shows the same lighting fixture. It is sectional drawing which shows the lighting fixture which concerns on embodiment which provided the shielding means of the lighting fixture. It is sectional drawing of the lighting fixture which concerns on 2nd Embodiment which concerns on embodiment of this invention. It is a partially expanded sectional view of a light guide.

  Embodiments of the present invention will be described below with reference to FIGS. In each drawing, the wiring connection relationship using lead wires or the like may be omitted. In addition, the same code | symbol is attached | subjected to the same part and the overlapping description is abbreviate | omitted.

  The lighting apparatus of the present embodiment is for a general house that is used by being attached to a hanging sealing body as a wiring apparatus installed on the apparatus mounting surface, and has a plurality of light emitting elements mounted on a substrate. The room is illuminated by light emitted from the section.

  1 to 3, the lighting fixture includes a main body 1, a light source 2, a diffusion member 3, a lighting device 4, a lighting device cover 5, a mounting portion 6, and a cover member 7. Moreover, the adapter A electrically and mechanically connected to the hooking sealing body Cb installed in the ceiling surface C as an instrument mounting surface is provided. Such a lighting fixture is formed in a round and circular appearance, and the front side is a light irradiation surface and the back side is a mounting surface to the ceiling surface C.

  The main body 1 is a chassis formed in a circular shape from a flat plate of a metal material such as a cold-rolled steel plate, and a circular opening 11 for disposing a mounting portion 6 described later is formed in a substantially central portion. Yes. Further, on the outer peripheral side of the flat portion 12 on the inner surface side to which the light source unit 2 is attached, a stepped portion 13 is formed toward the back side to form a bowl-shaped concave portion 14. A cover receiving member to which the cover member 7 is detachably attached is disposed at the step portion 13. More specifically, the cover receiving member is a cover metal fitting 75, and is arranged in the concave portion 14 formed by the stepped portion 13. Further, an elastic member 15 is provided on the back side of the main body 1.

  The light source unit 2 includes a substrate 21 and a plurality of light emitting elements 22 mounted on the substrate 21. The substrate 21 is disposed so that four arc-shaped substrates 21 having a predetermined width dimension are connected to each other, and is formed in a substantially circle shape as a whole. That is, the substrate 21 formed in a substantially circle shape as a whole is composed of four divided substrates 21.

  By using the substrate 21 thus divided, it is possible to suppress the deformation of the substrate 21 by absorbing thermal contraction at the divided portion of the substrate 21. In addition, although it is preferable to use the board | substrate 21 divided | segmented into plurality, you may make it use the board | substrate of 1 sheet integrally formed in the substantially circle shape.

  The board | substrate 21 consists of a flat plate of the glass epoxy resin (FR-4) which is an insulating material, and the wiring pattern is formed with the copper foil on the surface side. Further, a white resist layer acting as a reflective layer is applied on the wiring pattern, that is, on the surface of the substrate 21. The material of the substrate 21 can be a ceramic material or a synthetic resin material when an insulating material is used. Furthermore, when it is made of metal, a metal base substrate in which an insulating layer is laminated on one surface of a base plate having good thermal conductivity such as aluminum and excellent heat dissipation can be applied.

  The light emitting element 22 is an LED, which is a surface mount type LED package. A plurality of LED packages are arranged along the circumferential direction of a plurality of circle-shaped substrates 21, that is, in a plurality of rows on a substantially circumference centered on the mounting portion 6, and in this embodiment, two rows on the inner peripheral side and the outer peripheral side. Has been implemented. In addition, the LED package has a light emission color of daylight white N and a light bulb color L, which are alternately arranged, and the adjacent light emitting elements 22 in each row are arranged at substantially equal intervals. It is arranged in a space. Color adjustment is possible by adjusting the current flowing through the LED package of daylight white color and bulb color.

  The light emitting elements 22 are not necessarily mounted in a plurality of rows. For example, you may make it mount in 1 row along the circumferential direction. The number of columns and the number of the light emitting elements 22 can be appropriately set according to a desired output.

  The LED package is roughly composed of an LED chip disposed in a main body formed of ceramics or synthetic resin, and a translucent resin for molding such as epoxy resin or silicone resin that seals the LED chip. It is configured. The LED chip is a blue LED chip that emits blue light. The translucent resin is mixed with a phosphor so that daylight white or light bulb color light can be emitted.

  In addition, LED may be made to mount an LED chip directly on the board | substrate 21, and you may make it mount a bullet-type LED, and a mounting system and a format are not exceptionally limited.

  The diffusing member 3 is a lens member, and is made of, for example, a transparent synthetic resin having an insulating property such as polycarbonate or acrylic resin, and is integrally formed in a substantially circle shape along the arrangement of the light emitting elements 22 to emit light. It is disposed so as to cover the entire surface of the substrate 21 including the element 22.

  In addition, the lens member has two ridges in the circumferential direction facing the light emitting element 22 on the substantially circular inner peripheral side portion and outer peripheral side portion, and a continuous ridge portion 31 having a constant cross-sectional shape is continuous. Is formed. A U-shaped groove 32 is continuously formed along the circumferential direction inside the protruding portion 31. Therefore, the U-shaped groove 32 is arranged to face the plurality of light-emitting elements 22, and the plurality of light-emitting elements 22 are accommodated and covered in the U-shaped groove 32. It is in a state.

  Further, a flat portion 33 extending in the width direction is formed from the protruding portions 31 so that the entire surface of the substrate 21 is covered.

  According to the lens member configured as described above, the light emitted from the plurality of light emitting elements 22 is diffused and radiated mainly by the protrusions 31 in the inner circumferential direction and the outer circumferential direction on the circumference. That is, the light emitted from the light emitting element 22 is mainly diffused and emitted in the radial direction with the circle-shaped center where the light emitting element 22 is disposed as the origin.

  Therefore, it is possible to improve the uniformity of the irradiation light by the light emitted from the plurality of light emitting elements 22 by the lens member. Further, the graininess due to the luminance of each light emitting element 22 can be suppressed. In this case, it is desirable to set the light distribution angle by diffusion to about 120 to 160 degrees.

  Moreover, since the flat part 33 is formed in the diffusing member 3 so as to cover the entire surface of the substrate 21, the charging part is covered and protected by the diffusing member 3.

  Note that the diffusing member 3 may not be integrally formed in a substantially circle shape. For example, corresponding to the divided substrates 21, the substrates 21 may be divided and formed. In this case, the plurality of light emitting elements 22 mounted on one substrate 21 are continuously covered with the diffusing member 3.

  Further, the diffusion member 3 is not limited to a lens member, and a diffusion sheet or the like may be applied. In the light source unit 2 configured as described above, the substrate 21 is positioned around the mounting unit 6, and the mounting surface of the light emitting element 22 is disposed on the front side, that is, in the lower irradiation direction. . Further, the substrate 21 is attached in surface contact so that the back surface side of the substrate 21 is in close contact with the flat portion 12 on the inner surface side of the main body 1. Specifically, the diffusing member 3 is overlapped from the front side of the substrate 21, and the diffusing member 3 is attached to the main body 1 by a fixing means such as a screw S, so that the substrate 21 is connected to the main body 1 and the diffusing member 3. It is sandwiched between and pressed and fixed. That is, the substrate 21 and the diffusing member 3 are fastened together by one screw S.

  Accordingly, the substrate 21 is thermally coupled to the main body 1 so that heat from the substrate 21 is conducted from the back surface side to the main body 1 and radiated. The surface contact between the substrate 21 and the main body 1 is not limited to the case where the entire surface of the substrate 21 is in contact with the main body 1. It may be a partial surface contact.

  In addition, since the flat portion 33 of the diffusion member 3 is in surface contact with the mounting surface side of the substrate 21, heat is transmitted from the mounting surface side of the substrate 21 to the diffusion member 3 and passes through the diffusion member 3. Heat can be dissipated. That is, heat can be radiated from the front side of the substrate 21.

  The lighting device 4 includes a circuit board 41 and circuit components 42 such as a control IC, a transformer, and a capacitor mounted on the circuit board 41. The circuit board 41 is formed in a substantially arc shape so as to surround the periphery of the mounting portion 6, and the adapter A side is electrically connected, and is connected to a commercial AC power source via the adapter A. Accordingly, the lighting device 4 receives this AC power supply, generates a DC output, supplies the DC output to the light emitting element 22 via the lead wire, and controls the light emitting element 22 to be turned on.

  Such a lighting device 4 is disposed between the attachment portion 6 and the light source portion 2, that is, the substrate 21.

  The lighting device cover 5 is formed in a substantially short cylindrical shape by a metal material such as a cold rolled steel plate, and is attached to the main body 1 so as to cover the lighting device 4. The side wall 51 is inclined so as to expand toward the back side, and an opening 53 is formed in the front wall 52 so as to correspond to the attachment portion 6. Therefore, a part of the light emitted from the light emitting element 22 is reflected to the front side by the side wall 51 and effectively used. In addition, an arcuate guide recess 54 that is recessed toward the back surface is formed at the periphery of the opening 53.

  The attachment portion 6 is an adapter guide formed in a substantially cylindrical shape, and an engagement port 61 through which the adapter A is inserted and engaged is provided at the center portion of the adapter guide. The adapter guide is disposed corresponding to the opening 11 formed in the central portion of the main body 1. A base is formed on the outer periphery of the adapter guide so as to protrude from the outer periphery, and an electrical auxiliary component 62 such as an infrared remote control signal receiver or an illuminance sensor is disposed on the base. .

  Note that the attachment portion 6 is not necessarily a member referred to as an adapter guide or the like. For example, it may be an opening formed in the main body 1 or the like, and in essence, it means a member or a part that is opposed to the hooking sealing body Cb as a wiring device and to which the adapter A is engaged.

  The cover member 7 is formed in a substantially circular shape from a material having translucency, such as acrylic resin, and having a milky white diffusibility. The cover member 7 is detachably attached to the outer peripheral edge of the main body 1 so as to cover the front side of the main body 1 including the light source unit 2 and the electrical auxiliary component 62. Specifically, by rotating the cover member 7, the cover mounting bracket provided on the cover member 7 is engaged with the cover receiving bracket 75 disposed in the recess 14 in the step portion 13 on the outer peripheral portion of the main body 1. It is installed by doing. Further, when removing the cover member 7, the cover member 7 can be removed by rotating the cover member 7 in a direction opposite to that at the time of attachment and releasing the engagement between the cover attachment fitting 74 and the cover receiving fitting 75.

  The infrared remote control signal receiver, which is one component of the electrical auxiliary component 62, is an infrared light receiving IC, which is composed of a photodiode, an amplifier, or the like, which is a photoelectric conversion element, and controls infrared rays transmitted from the infrared remote control transmitter R. It operates to receive the signal and control the light emitting state of the light emitting element 61 and the like. The illuminance sensor is composed of a photodiode or the like, and operates to measure ambient brightness and output a detection signal. Accordingly, when the surroundings are bright, the light emitting element 61 may be turned on with dimming (dimming).

  In the illuminance sensor, an output obtained from the illuminance sensor having sensitivity characteristics in the visible light region is detected and transmitted to the lighting device 5. However, since the light source unit 3 and the electrical auxiliary component 62 are disposed in the diffusing cover member 7, the light diffusing action of the cover member 7 and the reflected light reflected from the inner surface of the cover member 7 are detected. By doing so, for example, the illuminance sensor may sense the illuminance in the area immediately below the appliance and the illuminance diffused in the cover member 7, and the dimming system may be lowered. In such a case, it is conceivable to control by the control means of the lighting device 4. For example, when the illuminance detection value detected through the cover member 7 increases and the illuminance error with the actual floor illuminance increases, the illuminance error is deleted from the illuminance detection value detected by the illuminance sensor. By correcting, it is possible to ensure a highly reliable operation that can improve the detection accuracy of the illuminance sensor.

  Further, when the illuminance sensor senses diffused light or reflected light in the cover member 7 and the dimming system may be lowered, as another method, for example, as shown in FIG. An indirect light blocking member 82 capable of blocking light may be disposed between the inner surface of the cover member 7. In the present embodiment, the indirect light shielding member 82 is a black cylindrical sponge, the illuminance sensor detection unit as the electric auxiliary component 62 is positioned in the cylindrical opening, and the upper and lower surfaces of the sponge are mounted on the mounting unit 6 surface and The cover member 7 is closely attached. In addition, in the case where a means for suppressing malfunction of the illuminance sensor is provided, the configuration thereof is not limited. Further, not only the illuminance sensor but also means for suppressing malfunction of the human sensor or the like are further provided. It doesn't matter.

  Thus, in the state where the cover member 7 is attached to the main body 1, the inner surface side of the cover member 7 is in surface contact with the front wall 52 of the lighting device cover 5 or is disposed in proximity. In addition, in the notch of the lighting device cover 5, the infrared remote control signal receiving portion of the electrical auxiliary component 62 and the illuminance sensor are interposed, and are arranged close to the inner surface of the cover member 7. Note that heat generated from the lighting device 4 and the like is conducted to the lighting device cover 5 that is in contact with or in close proximity to the lighting device cover 5 and further conducted to the cover member 7 to promote heat dissipation.

  In addition, the distance between the diffusing member 3 and the cover member 7 is set to 20 to 60 mm, preferably 30 to 50 mm. As a result, the light emitted from the light emitting element 22 is diffused to improve the uniformity of the irradiated light, and the heat conducted from the mounting surface side of the substrate 21 to the diffusing member 3 through the cover member 7 is effective. The heat is dissipated.

  The adapter A is electrically and mechanically connected to a hooking sealing body Cb installed on the ceiling surface C by a hooking blade provided on the upper surface side, and has a substantially cylindrical shape. Is provided so that it always protrudes to the outer peripheral side by a built-in spring. The locking portion A1 is immersed by operating a lever provided on the lower surface side. Further, a power cord for connecting to the lighting device 4 is led out from the adapter A, and is connected to the lighting device 4 via a connector.

  Next, the attachment state to the ceiling surface C of a lighting fixture is demonstrated. First, the adapter A is electrically and mechanically connected to the hanging sealing body Cb installed on the ceiling surface C in advance. From this state, the fitting body 6 is pushed up by hand from below until the engaging portion 61 of the adapter A is securely engaged with the engaging port 61 of the adapter guide while the engaging portion 61 of the adapter guide as the mounting portion 6 is aligned with the adapter A. To install. Then, the cover member 7 is attached to the main body 1. This attachment completion state is shown. At this time, the elastic member 15 is interposed in close contact between the ceiling surface C and the back side of the main body 1, and the lighting fixture is fixed to the ceiling surface C.

  Further, when removing the luminaire, it can be removed by removing the cover member 7 and operating the lever provided on the adapter A to disengage the engaging portion A1 of the adapter A.

  When power is supplied to the lighting device 4 in a state where the lighting fixture is attached to the ceiling surface C, the light emitting elements 22 are energized through the substrate 21 and the light emitting elements 22 are turned on. The light emitted from the light emitting element 22 is diffused in the radial direction by the diffusion member 3 that continuously covers the plurality of light emitting elements 22 and is emitted to the front side. The light emitted to the front side is diffused and transmitted by the cover member 7 and irradiated outward. Therefore, it is possible to improve the uniformity of the irradiated light and to suppress the graininess due to the brightness of each light emitting element 22.

  Further, a part of the light traveling toward the inner peripheral side in the radial direction is reflected to the front side by the inclined side wall 51 in the lighting device cover 5 and is effectively used.

  Further, since the cover bracket 75 is disposed at the step portion 13 formed on the outer periphery of the main body 1, the amount of protrusion to the front side is small, and it becomes an obstacle for light emitted from the light emitting element 22. Can be suppressed.

  On the other hand, the heat generated from the light emitting element 22 is effectively conducted to the main body 1 and is dissipated over a wide area because the back side of the substrate 21 is in surface contact with the main body 1. Further, since the step portion 13 is located along the outer periphery of the substrate 21 in the vicinity of the outer peripheral side of the substrate 21, the heat radiation area can be increased by the step portion 13, and the heat dissipation effect at the outer peripheral portion of the main body 1. Can be increased. In addition, the step portion 13 can provide a reinforcing effect of the main body 1.

  In addition, since the lighting device 4 is disposed between the mounting portion 6 and the substrate 21, the lighting device 4 is reduced from being thermally affected by the substrate 21. This is because the heat of the substrate 21 is conducted toward the outer peripheral direction of the main body 1 and tends to be radiated.

  Further, since the cover member 7 comes into surface contact with the lighting device cover 5, heat generated from the lighting device 4 is conducted to the lighting device cover 5 and further conducted to the cover member 7 for heat dissipation. Can do.

  In addition, since the flat portion 33 of the diffusing member 3 is in surface contact with the mounting surface side of the substrate 21, heat can be radiated from the mounting surface side of the substrate 21 through the diffusing member 3 and also from the front surface side. Become. Further, in this case, since the diffusing member 3 covers the entire surface of the substrate 21, the charging unit is protected.

  As described above, according to the present embodiment, since the electrical auxiliary component 62 is disposed in the cover member 7, the designability of the instrument body can be improved. In addition, even when the appliance main body 1 is attached to a window or the like, since the illuminance sensor does not receive external light directly, it is possible to suppress deterioration in illuminance detection accuracy due to external light, and thus the arrangement of the appliance 1 in the living space is limited. Can also be suppressed.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, a solid light emitting element such as an LED or an organic EL can be applied as the light emitting element. In this case, the number of light emitting elements is not particularly limited.

  Next, FIGS. 5 and 6 show a second embodiment. FIG. 5 is a cross-sectional view showing a state in which the lighting apparatus according to the present embodiment is attached to the ceiling, and FIG. 6 is an enlarged view showing a portion surrounded by a line in FIG.

  In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  5 and 6, the lighting fixture includes a fixture main body 1, a light source unit 2, a lighting device 4, and a center member 4. Furthermore, the luminaire includes an illuminance sensor 62a as an electrical auxiliary component, a cover member 7, a central cover member 8, and an indirect light source unit 9.

  As shown in the drawing, the light source unit 2 includes light emitting elements 22 having a light emission color of neutral white (N) and a light bulb color (L) in an inner peripheral row and an outer peripheral row. Are arranged alternately on the circumference at regular intervals. The light emitting element 22 is an LED chip that emits blue light. In the translucent resin, a phosphor is mixed, and in order to be able to emit white light of daylight white (N) and light bulb color (L), the light is mainly complementary to the blue light. Yellow phosphors that emit some yellow light are used.

  As the light emitting elements 22 mounted in the middle row, those emitting light in red (R), green (G), and blue (B) are used.

  The light-emitting elements 22 that emit red (R), green (G), and blue (B) are sequentially arranged on the circumference sequentially from red (R), green (G), and blue (B) at substantially equal intervals. It is arranged with a gap.

  As shown in the figure, a light source cover 25 is provided on the front side of the light source 2. The light source cover 25 is made of, for example, a transparent synthetic resin having an insulating property such as polycarbonate or acrylic resin, and is integrally formed in a substantially circle shape along the arrangement of the light emitting elements 22, and includes the light emitting elements 22. Are arranged so as to cover the entire surface of the substrate 21.

  Therefore, the light emitted from the light emitting element 22 passes through the light source unit cover 25. Further, since the entire surface of the substrate 21 is covered, the charging unit is covered with the light source unit cover 25 to ensure insulation.

  The lighting device 4 is attached to and covered with the lighting device cover 45 and is arranged on the back side of the main body 1. In this case, the circuit board 41 is attached with the circuit component 42 facing the front side (the lower side in the drawing).

  The indirect light source unit 9 is provided on the back side of the main body 1 and mainly has a function of illuminating the ceiling surface brightly. The indirect light source unit 9 includes a substrate 91 and a plurality of light emitting elements 92 mounted on the substrate 91.

  Substrates 91 on which the light emitting elements 92 are mounted are attached to four locations on the side wall 35 a of the lighting device cover 35. These substrates 91 are covered with a box-like translucent cover 93.

  The light emitting element 92 is an LED, like the light source unit 2, and is a surface mount type LED package. The light emitting element 92 is connected to the lighting device 4 and controlled to be lit.

  Further, on the back side of the lighting device cover 45, a lighting fixture mounting spring member is mounted in the vicinity thereof corresponding to the mounting position of the indirect light source unit 9. The spring member is made of a metal such as stainless steel, and is formed by bending a horizontally long rectangular plate spring.

  As shown with reference to FIG. 5, the center member 10 is made of a synthetic resin material such as PBT resin, is formed in a substantially short cylindrical shape, and has an opening 10a that is hooked at the center and faces the sealing body Cb. have. An annular space 10b is formed around the opening 10a, and an illuminance sensor 62a as an electrical auxiliary component 62 described later is disposed in the space 10b.

  Further, a light receiving window 10c facing the light receiving portion of the illuminance sensor 62a and a plurality of key-like engagement holes are formed on the front wall of the center member 10. Furthermore, a plurality of engaging protrusions that protrude toward the front side are formed on the outer peripheral edge of the front wall. The light receiving window 10c is formed at the front end of a cylindrical guide tube extending inward from the front wall.

  As shown mainly in FIG. 5, the center member 10 configured in this manner is attached to the chassis with a flange on the back side screwed to the chassis via the light source cover 25. The center member 10 can be directly or indirectly attached to the chassis, and its specific attachment configuration is not limited.

  The illuminance sensor 62a is composed of a sensor element such as a photodiode, and operates to detect ambient brightness and output a detection signal. Thereby, when the surroundings are bright, the light source unit 2, that is, the light emitting element 22 is controlled to be dimmed (dimmed) and lit.

  The illuminance sensor 62a is mounted on the substrate 62b, and is disposed and attached in the space 10b of the center member 10 so that the light receiving portion thereof faces the light receiving window 10c. More specifically, the substrate 62b is screwed to the boss of the center member 10, the illuminance sensor 62a is accommodated in the guide tube, and the light receiving portion thereof is disposed so as to face the light receiving window 10c.

  The cover member 7 is formed in a substantially circular shape from a translucent material such as an acrylic resin and has a milky white diffusibility, and a circular opening 71 is formed in the center. A plurality of notches that oppose a plurality of engagement protrusions (not shown) in the center member 10 are formed in the opening edge E of the opening 71. Further, a cover member decorative frame is attached to the outer peripheral portion of the cover member 7, and the cover member decorative frame 72 is formed of a transparent material made of acrylic resin or the like.

  The cover member 7 is detachably attached to the outer peripheral edge of the main body 1 so as to cover the front side of the main body 1 including the light source section 2. Specifically, by rotating the cover member 7, the cover member mounting bracket 74 provided on the cover member 7 is engaged with the cover member receiving bracket 75 provided in the recess formed by the protruding portion of the main body 1. Can be installed by joining.

  The center cover member 8 is formed in a circular shape from a material such as a transparent acrylic resin. The center cover member 8 corresponds to the opening 71 of the cover member 7, is attached to the front wall of the center member 10, and is disposed so as to cover and close the opening 10 a of the center member 10.

  The central cover member 8 is formed with a circular transmission part 81 facing the light receiving window 10c of the illuminance sensor 62a, and a plurality of key-like engagements formed on the front wall of the center member 10 on the back side. A plurality of L-shaped engagement protrusions that are opposed to the joint hole are formed.

  In addition, it is desirable to stick an opaque film material or the like on the front surface side of the central cover member 8 leaving at least the transmission part 81.

  6A and 6B show the positional relationship between the opening edge E of the cover member 7 and the light receiving window 10c of the illuminance sensor 62a formed in the center member 10 in the attaching process of the center cover member 8. To explain.

  As shown in FIG. 6A, in the state where the cover member 7 is attached to the main body 1, that is, the state before the central cover member 8 is attached, the opening edge E of the cover member 7 is the front surface of the center member 10. It is located more on the front side and on the front side than the light receiving window 10c of the illuminance sensor 6.

  As shown in FIG. 6B from this state, by attaching the central cover member 8, the opening edge E of the cover member 7 is positioned on the back side from the front surface of the center member 10. Specifically, the opening edge E of the cover member 7 is positioned on the back side from the light receiving window 10 c of the illuminance sensor 6.

  As shown in FIG. 6A, if the opening edge E of the cover member 7 is located on the front side of the light receiving window 10c of the illuminance sensor 62a, the light is emitted from the light source unit 2 and diffused by the cover member 7. Alternatively, the guided light may enter the light receiving window 10c and affect the illuminance sensor 62a.

  However, as shown in FIG. 6B, the opening edge E of the cover member 7 is positioned on the back side from the front surface of the center member 10, and is positioned on the back side from the light receiving window 10c of the illuminance sensor 62a. It is possible to suppress the light from the unit 2 from affecting the illuminance sensor 62a.

  Further, a thin portion 82 having a small thickness is formed as an indirect light shielding member 76 serving as a malfunction control unit around the light receiving window 10c of the illuminance sensor 62a in the central cover member 8. Since the thin portion 82 can partially reduce the amount of light that is guided from the light source unit 2 to the central cover member 8, the illuminance sensor 62a receives light from the cover member 7 and the central cover member 8. It is possible to suppress malfunction. In addition, a reflective portion, a notch portion, or the like that affixes a black tape around the periphery, applies a black coating, or guides light guided in the cover member 7 in a direction different from the illuminance sensor 62a. By forming, the light shielding effect is enhanced, and the effect of suppressing the light from the light source unit 2 from affecting the illuminance sensor 62a is enhanced.

  In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible in the range which does not deviate from the summary of invention. Moreover, the said embodiment is shown as an example and is not intending limiting the range of invention. For example, in the above-described embodiment, a description has been given of using a light emitting element such as an LED suitable as a light source, but the light source is not particularly limited, and hinders application to a lighting fixture using a fluorescent lamp or the like as the light source. It is not a thing.

DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Light source part, 3 ... Diffusing member (lens member), 4 ... Lighting apparatus, 5 ... Lighting apparatus cover, 6 ... Mounting part (adapter guide), DESCRIPTION OF SYMBOLS 7 ... Cover member, 8 ... Center cover member, 13 ... Step part, 21 ... Board | substrate, 22 ... Light emitting element (LED), 31 ... Projection part, 33 ... Flat part, 74 ... cover mounting bracket, 75 ... cover receiving member (cover receiving bracket), A ... adapter, C ... fixture mounting surface (ceiling surface), Cb ... wiring fixture (pull) Hanging sealing body), 10 ... Center member

Claims (3)

A main body having a mounting portion to be attached to a wiring device installed on the device mounting surface;
A lighting device disposed on the outer peripheral side of the mounting portion;
A substrate on which the mounting surface having a white reflective layer is directed to the front side and the back side is disposed on the main body so as not to overlap the lighting device outside the lighting device;
A plurality of light emitting elements mounted on the substrate along a circumferential direction;
A sensor which is a region surrounded by the light emitting element and which is disposed between the mounting portion and the light emitting element;
A cover member attached to the main body and covering the light emitting element and the sensor;
The lighting fixture characterized by comprising. The lighting device according to claim 1, wherein the light emitting element and the sensor are arranged in the same direction.   The lighting apparatus according to claim 1, further comprising: a malfunction suppression unit configured to suppress malfunction of the sensor by receiving light in the cover member.

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