JP4511082B2 - lighting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lighting fixture for starting and lighting a discharge lamp with an inverter-type electronic ballast, and more particularly to a lighting fixture suitable as an outdoor floodlight.
[0002]
[Prior art]
The projector uses an illuminator in which an iron core (copper iron) ballast or an inverter type electronic ballast is connected between the discharge lamp and its power supply. The apparatus is very heavy, and requires various kinds of combinations corresponding to power supply frequencies of 50 Hz and 60 Hz, power supply voltages of 100 V and 200 V, and has various disadvantages such as high heat generation temperature and high power consumption. .
[0003]
On the other hand, the inverter type electronic ballast is composed of electronic components such as a semiconductor element forming an inverter circuit for starting and lighting a discharge lamp with a rectangular wave, and is significantly lighter than an iron core type ballast, 50 Hz, Common specifications such as 60 Hz, 100 V, and 200 V are also possible, and it has the advantages of power saving and low heat generation temperature.
[0004]
However, if an inverter-type electronic ballast composed of electronic components such as semiconductor elements that are vulnerable to heat is incorporated in the fixture body of a lighting fixture, the durability life is impaired by the heat of the discharge lamp attached to the fixture body. There is a fear.
[0005]
For this reason, the inverter type electronic ballast is separated from the appliance main body and installed in a place different from the appliance main body. In addition, when an inverter-type electronic ballast is built in the appliance body, the appliance body can be made large in size with a large internal space or passed through the appliance body in order to suppress temperature rise in the appliance body due to heat generated by the discharge lamp. Pore etc. had to be formed.
[0006]
[Problems to be solved by the invention]
However, if the lighting fixture having a vent hole in the fixture main body containing the inverter type electronic ballast is installed outdoors, the inverter type electronic ballast may break down due to rainwater or moisture entering from the vent hole. Therefore, it is not suitable as an outdoor floodlight. In addition, if the main body of the appliance with the inverter-type electronic ballast is made large in size with a large internal space, or if the inverter-type electronic ballast is separated from the main body of the appliance and installed in another location, the entire lighting fixture will be made compact. Can not do it.
[0007]
Therefore, the present invention has a technical problem regarding a lighting fixture in which an inverter-type electronic ballast is connected between a discharge lamp and its power source, and that it can be used as an outdoor floodlight and has a compact configuration.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a lighting fixture in which an inverter type electronic ballast is connected between a discharge lamp and a power source thereof, wherein the inverter type electronic ballast includes a fixture main body to which the discharge lamp is attached; Is housed in a separate waterproof case, and the waterproof case and the instrument body are integrated by a stem that creates a gap between the two, and the inner surface of the lid that seals the opening of the waterproof case A circuit board on which electronic components constituting the inverter type electronic ballast are mounted, and when the inside of the waterproof case reaches a certain temperature due to heat generation and solar radiation of the inverter type electronic ballast, a power supply circuit for the lamp A return-type thermal fuse that shuts off and prevents breakage of the electronic component is provided in close contact with or close to the inner surface of the lid .
[0009]
According to the present invention, since the inverter type electronic ballast is housed in the waterproof case, there is no risk of malfunction due to rainwater or moisture. In addition, the waterproof case that houses the inverter-type electronic ballast is separate from the fixture body to which the discharge lamp is mounted, and creates a gap between the fixture body and the heat generated by the discharge lamp. There is no risk of losing the durable life of the inverter type electronic ballast.
[0010]
In addition, the appliance main body that does not incorporate the inverter type electronic ballast can be remarkably reduced in size, and the waterproof case that accommodates the inverter type electronic ballast may be a small one. Since they are integrated by a stem that creates a gap between them, the entire lighting fixture can be made very compact.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below with reference to the drawings.
1, 2, and 3 are a front view, a rear view, and a side view showing an example of a lighting fixture according to the present invention, and FIG. 4 is a perspective view showing an example of an inverter-type electronic ballast housed in a waterproof case. These are process drawings in which a moisture-proof coating is formed on the surface of the wiring board and the electronic component of the inverter type electronic ballast.
[0012]
In the lighting fixture of this example, an inverter type electronic ballast 2 connected between the discharge lamp 1 and its power source is housed in a waterproof case 4 that is separate from the fixture body 3 to which the discharge lamp 1 is attached. The instrument body 3 and the waterproof case 4 are both made of aluminum die casting or the like, and are integrated by one or more stems 5 and 5 that generate a gap L of about several centimeters therebetween.
[0013]
The appliance body 3 is provided with a socket 6 for mounting the discharge lamp 1 therein, and a frame 10 that covers the discharge lamp 1 is provided on the front surface side, and a radiating fin that dissipates heat of the discharge lamp 1 on the rear surface side. 8 is formed. The frame body 10 is configured to be detachably attached to the front surface of the instrument body 3 with a snap lock 9 and to which a transparent or diffusive front glass 11 is attached.
[0014]
The waterproof case 4 is provided with a lid body 12 that seals an opening formed on the rear surface side thereof, and wiring boards 13a and 13b in which electronic components constituting the inverter electronic ballast 2 are mounted on the inner surface of the lid body 12. Is attached.
[0015]
The lid 12 of the waterproof case 4 is made of a metal plate having heat radiating fins 14 or similar convex portions formed on the outer surface thereof, and is detachably attached to the opening of the waterproof case 4 with screws 24. Yes.
[0016]
Further, an endless rib 15 for mounting a waterproof ring-shaped packing to be brought into close contact with the opening of the waterproof case 4 is formed on the inner surface of the lid 12, and a recess 16 is formed inside the rib 15. At the same time, the wiring boards 13 a and 13 b and the electronic components mounted thereon are arranged so as to fit within the surface of the lid body 12 surrounded by the endless ribs 15.
[0017]
The inverter-type electronic ballast 2 is used at 130 ° C., for example, at 130 ° C. to prevent the electronic components forming the inverter circuit from being damaged due to heat generated by the rectification phenomenon at the end of the lamp life or lamp abnormality. It is equipped with a 130 ° C resettable thermal fuse (not shown) that shuts off the power supply circuit.
[0018]
However, according to an outdoor experiment, if the discharge lamp 1 remains on during the summertime when the temperature is high and the solar radiation is strong, the synergism between the heat generated by the inverter electronic ballast 2 and the solar heat Due to the action, when the ambient temperature in the waterproof case 4 suddenly rises above the operating temperature of the 130 ° C. resettable temperature fuse and the resettable temperature fuse is activated, the surface of the electronic components mounted on the wiring boards 13a and 13b The temperature may already exceed the use upper limit temperature of the electronic component by 10 ° C. or more.
[0019]
Therefore, when the inside of the waterproof case 4 reaches a certain temperature due to the heat generated by the inverter-type electronic ballast 2 and the solar heat, separately from the reset type thermal fuse that operates by detecting the heat generated by the abnormality at the end of the lamp life. A reset type thermal fuse 17 is provided to shut off the lamp power circuit.
[0020]
The temperature fuse 17 is preferably a 100 ° C. resettable temperature fuse that operates at approximately 100 ° C., for example, using a 90 ° C. resettable temperature fuse that operates at 90 ° C., the lighting start time of the discharge lamp 1: 6 pm 30 minutes, actual lighting effect: If set to 7:00 pm, inverter type to turn on the sun's solar radiation and the lamp under the windless temperature of 30 ° C in midsummer west Due to the heat generated by the electronic ballast 2, the temperature inside the waterproof case 4 slightly exceeds 90 ° C. after about 30 minutes from the start of lighting, and the thermal fuse is activated around 7 pm when the actual lighting effect is required. It has been confirmed by experiments that there is a possibility of causing a problem that the lamp is turned off.
[0021]
On the other hand, if the 100 ° C. reset type thermal fuse 17 is used, there is no fear of causing such a problem. The thermal fuse 17 is mounted on a wiring board 13b attached in close contact with the inner surface of the lid 12 of the waterproof case 4 to which solar heat is directly transmitted, and is provided in close proximity to or in close proximity to the inner surface of the lid 12. If so, the temperature of the waterproof case 4 due to forgetting to turn off the lamp is promptly detected and the lamp power supply is shut off, so that the electronic components mounted on the wiring boards 13a and 13b may be damaged beyond the upper limit temperature of use. Can be solved reliably.
[0022]
In addition, the inverter type electronic ballast 2 is formed with an insulating moisture-proof coating on the entire surfaces of the wiring boards 13a and 13b and the electronic components mounted on the wiring boards 13a and 13b in order to more reliably prevent failure due to rainwater or moisture. Housed in a water discharge case 4.
[0023]
First, as shown in FIG. 5A, the moisture-proof coating is formed by placing the wiring boards 13a and 13b in the dip tank 18 with the inner surface of the lid 12 provided with the inverter type electronic ballast 2 facing downward. It is immersed in a stored melt 19 of an insulating resin such as silicon rubber, and the melt 19 is attached to the entire surfaces of the wiring boards 13a and 13b and the electronic components mounted thereon.
[0024]
Next, as shown in FIG. 5 (2), the wiring boards 13a and 13b are lifted from the dip tank 18, and the excess melt dripping from the wiring boards 13a and 13b is dropped into the dip tank 18, and then the FIG. As shown in (3), the lid 12 is turned over so that the inner surface of the lid 12 faces upward, and is attached to the surfaces of the wiring boards 13a and 13b and the electronic component in the state where the lid 12 is placed on a stand as shown in FIG. Curing the insulating resin.
[0025]
If the insulating resin is silicon rubber, it will drip if it is not stored and cured in the processing posture shown in FIG. 5 (2) for a whole day. However, the wiring boards 13a and 13b and the electronic components mounted thereon are endless. Since it is arranged so as to fit within the surface of the lid 12 surrounded by the ribs 15, even if sagging occurs from the surfaces of the wiring boards 13a and 13b and the electronic components in the state of FIG. Accumulates in a recess 16 formed inside the endless rib 15 of the lid 12 and is blocked by the endless rib 15 so as not to flow out of the lid 12.
[0026]
Therefore, since it is not necessary to maintain the processing posture of FIG. 5 (2) and store it all day and night in order to cure the silicon rubber, there is no insulating property on the wiring boards 13a and 13b and the surface of the electronic component of the inverter type electronic ballast 2. The work process for forming the moisture barrier film is greatly simplified.
[0027]
A cabtyre 20 for wiring a power cord or the like connected to the inverter type electronic ballast 2 is provided on the lower surface side of the waterproof case 4. Further, at least one of the stems 5, 5 that integrates the instrument main body 3 and the waterproof case 4 forms a pipe through which a lamp cord that supplies power to the discharge lamp 1 is inserted.
[0028]
The waterproof case 4 is attached with a mounting bracket 21 for direct attachment for attaching a lighting fixture to an outer wall of a building. The mounting bracket 21 is made of a metal bar bent in a U-shape, and both ends thereof are fixed to the left and right ends of the waterproof case 4 by angle adjusting screws 22 and 22 that variably adjust the mounting angle of the mounting bracket 21. In addition, the radiation fin 23 is formed in the surface of the angle adjustment screws 22 and 22, respectively.
[0029]
In the lighting fixture configured as described above, the inverter type electronic ballast 2 connected between the discharge lamp 1 and its power source is housed in the waterproof case 4 and the wiring board constituting the inverter type electronic ballast 2. Since the insulating moisture-proof coating is formed on the entire surfaces of the electronic components 13a and 13b and the electronic components mounted thereon, the electronic components are not likely to be damaged by rainwater or moisture.
[0030]
In addition, the waterproof case 4 that accommodates the inverter type electronic ballast 2 is separate from the instrument body 3 to which the discharge lamp 1 is attached, and a gap L is generated between the instrument body 3 and the instrument case 3. Therefore, there is no possibility that the endurance life of the inverter-type electronic ballast 2 is impaired by the heat of the discharge lamp 1 attached to the appliance body 3.
[0031]
In addition, the inverter-type electronic ballast 2 housed in the waterproof case 4 is equipped with a 100 ° C. resettable temperature fuse 17 that operates at approximately 100 ° C. and shuts off the power supply circuit of the lamp. It is possible to reliably prevent the temperature in the waterproof case 4 from exceeding the upper limit use temperature of the electronic component due to the heat generated by the inverter electronic ballast 2 and solar heat.
[0032]
Therefore, even if it is installed in a place exposed to rain or sunlight directly, there is no possibility that the inverter type electronic ballast 2 will break down. Therefore, lighting for outdoor sports facilities and outdoor commercial facilities, lighting for sign advertising, lighting for lighting, etc. It is suitable as an outdoor floodlight used for.
[0033]
Moreover, since the instrument main body 3 does not contain an inverter type electronic ballast, it can be remarkably reduced in size. On the other hand, since the waterproof case 4 needs only to accommodate the inverter type electronic ballast 2, a small-sized one is sufficient.
[0034]
Further, the waterproof case 4 is provided with the inverter type electronic ballast 2 attached to the lid body 12 that is in direct contact with the outside air, and the heat radiating fins 14 are formed on the outer surface of the lid body 12. Since the heat dissipating effect that diffuses the outside to the outside is enhanced, the size can be further reduced. And the lighting fixture which integrated the downsized instrument main body 3 and the waterproof case 4 with the stems 5 and 5 also becomes a very compact thing as a whole.
[0035]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, while being able to make compact the lighting fixture by which an inverter type electronic ballast is connected between a discharge lamp and its power supply, even if it makes a lighting fixture compact, it is inverter type | mold with the heat | fever of a discharge lamp. There is no possibility that the durable life of the electronic ballast will be impaired, and even if the lighting fixture is installed outdoors, there are various excellent effects that there is no possibility that the inverter type electronic ballast will fail due to rainwater or moisture.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of a lighting fixture according to the present invention. FIG. 2 is a rear view of the lighting fixture shown in FIG. 1. FIG. 3 is a side view of the lighting fixture shown in FIG. Fig. 5 is a perspective view showing an example of an inverter type electronic ballast. Fig. 5 is a process diagram for forming a moisture-proof coating on the surface of the inverter type electronic ballast.
1 ……………… Discharge lamp 2 ……………… Inverter type electronic ballast 3 ……………… Tool body 4 ……………… Waterproof case 5 ……………… Stem 12 …… ………… Cover body 13a ……………… Wiring board 13b ……………… Wiring board 14 ……………… Heat radiation fin 15 ……………… Endless rib 16 ……………… Recess 17 ……………… Reset type thermal fuse 21 ……………… Mounting bracket for direct mounting

Claims (6)

In a lighting fixture in which an inverter-type electronic ballast is connected between a discharge lamp and its power supply, the inverter-type electronic ballast (2) is a waterproof case that is separate from the fixture body (3) to which the discharge lamp is attached. (4) The waterproof case (4) and the instrument body (3) are integrated by a stem (5) that creates a gap (L) between the waterproof case (4) and the waterproof case (4). Wiring boards (13a, 13b) on which electronic components constituting the inverter type electronic ballast (2) are mounted are attached to the inner surface of the lid (12) that seals the opening of the inverter type electronic ballast ( A resettable temperature fuse (17) that shuts off the power circuit of the lamp to prevent damage to the electronic component when the inside of the waterproof case (4) reaches a certain temperature due to heat generation and solar heat of 2); Lid (12) Luminaire, characterized in that provided in close or close to the inner surface. The lid (12) The lighting instrument of claim 1 wherein comprising a metal plate formed with protrusions similar radiation fin (14) or its the outer surface. The lighting fixture according to claim 1 or 2, wherein the thermal fuse (17) is a 100 ° C resettable thermal fuse that operates at approximately 100 ° C. An endless rib (15) is formed on the inner surface of the lid (12) for attaching a ring-shaped packing to be in close contact with the opening of the waterproof case (4). A recess (16) is formed, and the wiring boards (13a, 13b) and the electronic components mounted on the wiring board (13a, 13b) are accommodated in the surface of the lid (12) surrounded by the endless rib (15). The lighting fixture of Claim 1, 2, or 3 arrange | positioned. An insulating moisture-proof coating is formed on the entire surface of the wiring board and the electronic component mounted thereon by immersing the wiring board (13a, 13b) in a melt of insulating resin . The lighting apparatus according to 3 or 4 . The lighting fixture according to claim 1, 2, 3, 4 or 5, wherein a mounting bracket (21) for direct attachment is attached to the waterproof case (4).

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