JP2000133002A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To economically replace a fluorescent lamp suitable for spotlighting by radially erecting and arranging respective inverter fluorescent lamps each one end of which is fitted to a feeding socket such that the tip of a fluorescent tube part at each of the other end is converged toward one point on a center axis on the front side of a reflecting mirror. SOLUTION: Inverter fluorescent lamps 5 each fitted to a feeding socket 9 are installed along radial lines 23 formed by connecting a converging point 22 that is an intersection between the center axis 21 of a reflecting mirror 1 and the opening surface of the reflecting mirror 1 with the center point of the fitting surface of the respective feeding sockets 9. That is, each of the fluorescent lamps 5 of a standard specification of which one end is fitted to the feeding socket 9 is radially erected and arranged so that the tips of fluorescent tube parts 6 are converged toward the converging point 22 of one point on the center axis 21 on the front side of the reflecting mirror 1. Thereby, the fluorescent lamps 5 can be more stored than the fluorescent lamps 5 installed in the reflecting mirror 1 so that their fluorescent tube parts 6 are parallel with the opening surface of the reflecting mirror 1, provided that the opening area is the same.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for photographing,
In particular, the present invention relates to a lighting device used for photographing by a digital camera.

[0002]

2. Description of the Related Art An incandescent light bulb, a halogen light bulb, and the like are generally used as an illumination device for photographing a camera using a film. However, these bulbs generate considerable heat and emit not only visible light, but also infrared radiation that is harmful to CCD imaging. Therefore, when taking a picture using a digital camera equipped with a CCD, it is necessary not only to pay attention to shortening the illumination lighting time in order to reduce the influence of heat generation. It had to be worn, which was troublesome, and required more intense lighting than usual to compensate for the light attenuation by the filter. Another problem is that the spectral characteristics of these bulbs are not sufficient for CCDs. On the other hand, fluorescent lamps generate less heat, do not emit infrared rays, and have good spectral characteristics with respect to CCDs. Therefore, they are suitable as light sources for photographing digital cameras. Interesting. For example, as this type of device, FIG.
As shown in FIG. 2, a surface-emitting type fluorescent lamp illuminating device A using a straight tube fluorescent lamp and the like are manufactured.

[0003]

However, in the case of a digital camera equipped with a CCD, in particular, when a line sensor system is adopted, fluorescent lamp lighting using a commercial power supply requires
There has been a problem that a striped light and shade may occur in a captured image due to a time difference due to flicker of a fluorescent lamp. Therefore,
It was necessary to minimize the effects of flicker, and thus it was necessary to avoid using ordinary fluorescent lamps, in which commercial power was directly applied to the fluorescent lamps. In addition, it is necessary to cope with various Kelvin numbers and to cope with an increase in the amount of light, and from this viewpoint, it has been believed that a fluorescent light source for exclusive use must be used. As described above, in the conventional photographing lighting device using a fluorescent lamp, an inverter fluorescent lamp dedicated to photographing is used to satisfy these requirements, and therefore, the cost is high, and a replacement product when worn out is required. There was a disadvantage that it was not easily available. The above is a problem in terms of cost and availability, but there are also many problems in use. For example, the one conventionally used is one in which straight tube type inverter fluorescent lamps are arranged in parallel on the surface of a planar reflector as shown in FIG. Although suitable, it was not suitable for so-called spot illumination that illuminates a narrow area strongly. So-called spot illumination has an important role in sharpening the description of a photographing object or in obtaining various image effects, but has not been able to meet expectations. The present invention has been made in order to improve the above-mentioned disadvantages, and an object of the present invention is to provide an illuminating device suitable for photographing of a digital camera equipped with a CCD. While taking advantage of the characteristics of existing fluorescent lights,
An object of the present invention is to provide a lighting device which is suitable for spot lighting for strongly illuminating a narrow area, and which can easily obtain a replacement fluorescent lamp when consumed at a low price, and which also takes measures against heat generation.

[0004]

According to the present invention, as a lighting device for photographing a digital camera, attention is paid to the fact that a fluorescent lamp does not emit infrared rays and has a good spectral characteristic as described above, and an inverter fluorescent lamp is used in order to prevent flicker. Under the recognition that it is preferable to use, by devising a method of mounting a fluorescent lamp in the light emitting unit of the photographing illumination device, without using a dedicated inverter fluorescent lamp sold exclusively for photographing, Inverter fluorescent lamp of standard specification can be used,
The present invention has been devised for a lighting device suitable for spot lighting in consideration of measures against heat generation.

More specifically, a first solution is to provide a reflecting mirror 1 having a concave front section and a plurality of inverter fluorescent lamps having a bent fluorescent tube section 6 and a power supply section 8 provided at one end. 5
And a plurality of power supply sockets 9 disposed on the inner surface of the reflecting mirror 1; and lighting means for turning on the inverter fluorescent lamps 5, the inverter fluorescent lamps 5 having one end fitted to the power supply sockets 9. Are radiated and arranged such that the other end of the fluorescent tube portion converges toward one point 22 on the central axis 21 on the front surface side of the reflecting mirror 1 to constitute a lighting device.

A second solution is the first solution, wherein each of the inverter fluorescent lamps 5 whose one end is fitted to the power supply socket 9 is connected to the reflector tube 1 at the other end. Each of the inverter fluorescent lamps 5 having one end fitted to the power supply socket 9 instead of being erected radially so as to converge toward a point 22 on the central axis 21 on the front side, The only difference is that the fluorescent tube section 6 is arranged upright on the front side of the reflector 1 so that the fluorescent tube section 6 is parallel to the central axis 21 of the reflector 1. .

A third solution is that the first solution is different from the first solution in that a bowl-shaped reflector 1 having an open front is used instead of the reflector 1 having a concave open front. ,
Otherwise, it is the same as the first solving means.

The fourth solution is the same as the second solution, except that the reflecting mirror 1 having an open front is replaced by a bowl-shaped reflecting mirror 1 instead of the concave reflecting mirror 1 having an open front. ,
Otherwise, it is the same as the second solving means.

According to a fifth aspect of the present invention, in any one of the first to the fourth aspects, the outer surface of the reflecting mirror 1 is covered, and a gap 13 is provided between the reflecting mirror 1 and the reflecting mirror. The cover 12 to be installed, the warm air collecting space 14 provided in communication with the space 13, and the warm air remaining in the space 13 provided in the warm air collecting space 14 are forced toward the rear of the cover 12. And a blower 15 to be evacuated.

A sixth aspect of the present invention is the fifth aspect of the present invention, wherein the reflecting mirror 1 is provided with an intake hole 19 which is opened on the inner surface of the reflecting mirror 1 and communicates with the gap 13.

[0011]

First, in each of the first to fourth solving means, each of the inverter fluorescent lamps 5 having one end fitted to the power supply socket 9 is connected to the fluorescent tube portion 6 at the other end. The tip is the central axis 21 on the front side of the reflector 1
The fluorescent lamp 5 may be erected radially so as to converge toward a convergence point 22 which is one of the above points, or
Are arranged so as to be parallel to the central axis 21 of the reflecting mirror 1. Therefore, if the opening area of the reflecting mirror 1 is the same, a larger number of inverter fluorescent lamps are required as compared with the case where the inverter fluorescent lamp 5 is arranged so that the fluorescent tube section 6 is parallel to the opening surface of the reflecting mirror 1. The lamp 5 can be stored in the reflecting mirror 1. Further, since the tip of the fluorescent tube portion 6 of the inverter fluorescent lamp 5 is gathered near the central axis 21 of the reflecting mirror 1, the radiated light is concentrated near the central axis 21 of the reflecting mirror 1, and a strong luminous flux of the central light is emitted. Can be generated.

The fifth solving means has the following operation in addition to the functions of the first to fourth solving means. That is, the blower 15 removes the warm air staying in the gap 13,
Communication hole 16 between air gap and warm air collecting space and warm air collecting space 14
Through the warm air collecting space exhaust hole 18, the cover 12
Of the air gap 1
By causing a flow of air in 3 and cooling the reflecting mirror 1 from its back surface by this flow of air, it is possible to suppress a rise in the temperature of the inner surface space of the reflecting mirror 1 with which the inner surface of the reflecting mirror 1 contacts.

The sixth solving means has the following operation in addition to the functions of the first to fourth solving means. That is, the blower 15 forcibly exhausts not only the warm air staying in the gap 13 but also the warm air in the inner space of the reflecting mirror 1 toward the rear of the cover 12 through the air inlet 19. Therefore, not only the suppression of the temperature rise in the inner space of the reflecting mirror 1 due to the cooling from the back surface of the reflecting mirror 1 due to the flow of the air in the gap 13, but also the direct flow of the inverter fluorescent light By cooling the lamp 5 and the reflecting mirror 1 from the surface, it is possible to suppress an increase in the temperature of the inner space of the reflecting mirror 1. In addition, by forcibly exhausting the air in the inner space of the reflecting mirror 1 behind the cover 12 through the intake hole 19, the air from the opening surface of the reflecting mirror 1 toward the back of the cover 12 can be obtained. An air flow is generated, and the air flow moves the warm air in the inner space of the reflecting mirror 1 heated by the heat generated by the inverter fluorescent lamp 5 toward the photographing object in front of the opening surface of the reflecting mirror 1. Can be prevented.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a lighting device according to an embodiment of the present invention. First, a first embodiment will be described. FIG.
FIG. 2 is an external front view of this embodiment, FIG. 2 is an external side view of this embodiment, FIG. 3 is a side view of an inverter fluorescent lamp used in this embodiment, FIG. 4 is a plan view of the inverter fluorescent lamp, and FIG. FIG. 6 is a longitudinal sectional view of the light emitting unit of the embodiment, FIG. 6 is a transverse sectional view of the light emitting unit of the present embodiment, and FIG. 7 is a front view of the light emitting unit without the fluorescent lamp of the embodiment.

The external appearance of this embodiment is configured as shown in FIGS. That is, the appearance of the light projecting unit is such that a hemispherical metal cover 12 is provided on the outer surface of the hollow hemispherical concave reflecting mirror 1 made of metal, and between the cover 12 and the reflecting mirror 1. The void 13 is formed. Specifically, spacers 11 are sandwiched between the cover 12 and the reflecting mirror 1 at several places, and the cover 12 is fixed to the reflecting mirror 1 with screws and nuts. Then, a column mounting portion 2 is provided near the top of the outer surface of the cover 12, and a universal joint portion 24 provided with a fastening handle 25 is mounted on the lower surface of the bottom of the column mounting portion 2, and the column 3 is attached to the universal joint portion 24. Attach the tip,
Further, the support 3 is supported by a pedestal 4. Therefore, by moving the tightening handle 25, the illumination direction of the light emitting section can be freely controlled. The radius of curvature of the reflecting mirror 1 and the diameter of the front opening surface of the light projecting unit are determined according to the size of the target area to be spot-illuminated.

Next, an inverter fluorescent lamp used in this embodiment will be described. As described above, in the lighting device for photographing, in order to prevent flickering, an ordinary fluorescent lamp in which commercial power is directly applied to the fluorescent lamp using a lighting circuit including a lighting tube and a choke coil cannot be used. This is because it is necessary to avoid a problem that a striped light and dark may occur in a captured image due to a time difference due to flicker of the fluorescent lamp. Therefore, it is necessary to use an inverter fluorescent lamp that discharges at a high frequency using an inverter.
In order to mount the inverter fluorescent lamp inside the relatively small light emitting portion (reflecting mirror 1), the power supply portion is not a straight tube type provided at both ends of the fluorescent tube portion, but a fluorescent tube. Using a type in which the power supply section is provided at one end of the fluorescent tube section by bending the section is most suitable in terms of ease of wiring, aesthetics by reducing the number of exposed wires, and saving mounting space. is there.

In this embodiment, as shown in FIGS. 3 and 4, an inverter fluorescent lamp 5 in which a fluorescent tube portion is bent in a U-shape.
Use Such inverter fluorescent lamps are already widely available on the market as standard inverter fluorescent lamps, and the amount of light is slightly lower than that of conventional inverter fluorescent lamps dedicated to shooting, but the cost is much lower and it is available. Is also easy. Also, ones corresponding to various Kelvin numbers are manufactured. 3 and 4, the inverter fluorescent lamp 5 generally includes a fluorescent tube part 6, a base part 7, and a power supply part 8. An inverter circuit (not shown) for turning on and emitting the fluorescent tube section 6 is incorporated in the base section 7, and the power supplied to the power supply section 8 is once rectified into DC and then converted into high-frequency AC by this inverter circuit. And supplied to a fluorescent lamp. Since the fluorescent lamp is lit by the inverter circuit, a lighting circuit including a lighting tube and a choke coil is unnecessary. Since the inverter circuit can be configured by a semiconductor circuit, it can contribute to reduction in size and weight.

In this embodiment, as the fluorescent lamp, the inverter fluorescent lamp 5 having one U-shaped fluorescent tube is used. However, the present invention is not limited to this, and a fluorescent lamp having a plurality of U-shaped fluorescent tubes may be used. The shape of the fluorescent tube is not limited to the U-shape, but may be a W-shape or the like. Alternatively, a ball-shaped inverter fluorescent lamp may be used.

Next, a method of mounting the inverter fluorescent lamp 5 will be specifically described. The present invention is characterized by a method of mounting the inverter fluorescent lamp 5 housed in the reflecting mirror 1. For example, the mounting of the inverter fluorescent lamp 5 on the reflecting mirror 1 is shown in FIG.
This is performed as shown in FIGS. The fluorescent lamp 5 is mounted so that its tip is concentrated on one point on the central axis of the reflecting mirror 1,
For this reason, the size of the inverter fluorescent lamp is set to be smaller than the radius of the hemispherical reflecting mirror 1 when the power supply unit 8 of the inverter fluorescent lamp 5 is mounted on the power supply unit 10 of the power supply socket 9.

In this embodiment, the inverter fluorescent lamp 5 is
In this embodiment, twelve power supply sockets 9 into which the power supply portion 8 of the inverter fluorescent lamp 5 is fitted are provided on the inner surface of the reflector 1 as shown in FIG. It is installed vertically so as to face the inside of 1. Specifically, a total of twelve power supply sockets 9 drawn on the inner surface of the double concentric circle and four on the inner circle are drawn on the inner surface of the mirror 1 with the center of the mirror 1 as the center. Hang legs at equal intervals.

Then, in FIGS. 5 and 6, since the reflecting mirror 1 is a hemispherical concave mirror, the vertical line at any point on the inner surface of the reflecting mirror 1 is the center point of the opening surface of the reflecting mirror 1, That is, it passes through the intersection 22 between the central axis 21 of the reflecting mirror 1 and the opening surface of the reflecting mirror 1. Therefore, a convergence point 22 which is an intersection of the central axis 21 of the reflecting mirror 1 and the opening surface of the reflecting mirror 1;
Inverter fluorescent lamps 5 fitted to the power supply sockets 9 are provided along radial lines 23 connecting the center points of the fitting surfaces of the power supply sockets 9.

In this embodiment, the convergence point 22 is set to the intersection between the central axis 21 of the reflecting mirror 1 and the opening surface of the reflecting mirror 1. However, the present invention is not limited to this. As long as one point is on the front side of the reflecting mirror 1, another point may be used. That is, each of the inverter fluorescent lamps 5 having one end fitted to the power supply socket 9 is connected to the fluorescent tube portion 6 at the other end.
May be radially arranged so as to converge toward a convergence point 22 which is a point on the central axis 21 on the front side of the reflecting mirror 1. In addition, it is not necessary that all of the tips of the fluorescent tube portions 6 converge toward the convergence point 22 exactly, and some deviations are allowed.

The above-described method of mounting the inverter fluorescent lamp 5 has the following advantages since the inverter fluorescent lamp 5 is disposed upright on the inner surface of the reflecting mirror 1. That is, in the same manner as in the conventional system, that is, in the same manner as in the conventional fluorescent lamp illuminating device in which fluorescent lamps are arranged in parallel on the surface of a planar reflecting plate (in this case, the fluorescent tube portion of the fluorescent lamp is the opening surface of the illuminating device). And the opening area of the reflecting mirror 1 is smaller than that in the case where the inverter fluorescent lamp 5 is disposed in the reflecting mirror 1 so that the fluorescent tube portion 6 is parallel to the opening surface of the reflecting mirror 1. If they are the same, the lighting device of the present embodiment can accommodate more inverter fluorescent lamps 5. Therefore, by increasing the number of used fluorescent lamps, it is possible to use standard fluorescent lamps, which are already widely available in the market, without using the dedicated fluorescent lamps used exclusively for photography, which are used in conventional fluorescent lighting devices. With only this, it is possible to generate intense light per unit opening area of the light projecting unit which is equal to or higher than that of the conventional fluorescent lamp lighting device. Further, in this embodiment, the inverter fluorescent lamp 5 is erected radially on the central axis 21 of the reflecting mirror 1 so as to converge at a point on the front side of the reflecting mirror 1. Since the tip of the part 6 is concentrated near the central axis of the reflecting mirror 1, the radiated light is concentrated near the central axis of the reflecting mirror 1, so that a strong luminous flux of the central light can be generated. Therefore, the lighting device according to the present embodiment can provide a lighting device suitable for spot lighting that illuminates a narrow area strongly. Further, in the lighting device of the present embodiment, since the inverter fluorescent lamp of the standard specification which is already widely available on the market is used, it is possible to provide a lighting device which is inexpensive and easily obtains a replacement fluorescent lamp when worn out. .

In this embodiment, the inverter fluorescent lamps 5 are arranged radially upright. However, as shown in FIG. 8 (longitudinal sectional view of the reflecting mirror of the application example 1 of the first embodiment), the inverter fluorescent lamps 5 are provided. 5 may be arranged so as to be parallel to the central axis 21 of the reflecting mirror 1. In this case, if the opening area of the reflecting mirror 1 is the same, a larger number of inverter fluorescent lamps 5 can be accommodated as compared with the case where the reflecting mirrors 1 are arranged upright, and a lighting device suitable for more powerful spot lighting. Can be provided. In this embodiment, the reflector 1 is a bowl-shaped reflector.
Although a hemispherical concave mirror as a seed is used, another bowl-shaped reflecting mirror, for example, a crescent-shaped or parabolic-shaped reflecting mirror may be used. In this case, it is possible to provide an illumination device in which the shape of the reflecting mirror is optimal according to the application. Further, the reflecting mirror 1 is not limited to a bowl shape, and is shown in FIG. 9 (a longitudinal sectional view of the reflecting mirror of the application example 2 of the first embodiment).
A frustoconical shape or a pyramid shape as shown in FIG. In this case, since the structure is simple, it is possible to provide a lighting device which is easy to manufacture and inexpensive.

Next, cooling of the light projecting section will be described. FIG.
As described above, a hemispherical metal cover 12 is provided on the outer surface of the reflecting mirror 1, and a gap 13 is formed between the cover 12 and the reflecting mirror 1. The pole mounting part 2
It is attached near the top of the outer surface of the cover 12. Then, the name of the space inside the column mounting portion 2 is referred to as a warm air collecting space 14. A blower 15 is disposed above the inside of the warm air collecting space 14, and the blower 15 is held by a blower holding plate 17 provided on the inner wall of the warm air collecting space 14. On the upper surface of the warm air collecting space 14, a slit serving as a warm air collecting space exhaust hole 18 is provided. A gap 13 is provided near the top of the cover 12 to which the column mounting portion 2 having the warm air collecting space 14 is attached.
Cover 12 so that the air and the warm air collecting space 14 communicate with each other.
And a communication hole 16 between the air gap and the warm air collecting space is provided.
In addition, an intake hole 19 penetrating through the reflecting mirror 1 is provided near the bottom of the reflecting mirror 1 so as to open on the inner surface of the reflecting mirror 1 and communicate with the gap 13. The blower 15 not only warms up in the air gap 13 but also heats up the inner space of the reflecting mirror 1 through the air hole 19 and the communication hole 16 between the air gap and the warm air collecting space and the warm air collecting space 14. The fan of the blower 15 is installed with the direction of the fan set so as to forcibly exhaust air toward the rear of the cover 12 by the warm air collecting space exhaust hole 18.

In the above configuration, when the inverter fluorescent lamp 5 is turned on, the heat generated by the inverter fluorescent lamp 5 is transmitted to the reflecting mirror 1 via the power supply socket 9 and the inner space of the reflecting mirror 1, and the reflecting mirror 1 is turned on. The temperature rises and the void 13
Raise the temperature of the stagnant air. But blower 1
5 forcibly exhausting the warm air staying in the gap 13 toward the rear of the cover 12 by the warm air collecting space exhaust hole 18 through the gap / warm air collecting space communication hole 16 and the warm air collecting space 14. As a result, an air flow is generated in the air gap 13 and the reflecting mirror 1 is cooled from the back surface by the air flow, whereby a rise in the temperature of the inner surface space of the reflecting mirror 1 in contact with the inner surface of the reflecting mirror 1 can be suppressed. Also, blower 15
By not only warm air staying in the gap 13 but also warm air in the inner space of the reflecting mirror 1,
Air is forcibly exhausted to the rear of the cover 12. Therefore, not only the above-described cooling of the reflecting mirror 1 but also cooling of the inverter fluorescent lamp 5 and the reflecting mirror 1 directly from the surface by the inflow of air from the opening surface of the reflecting mirror 1, Temperature rise in the inner space can be suppressed. Not only that, but also the reflecting mirror 1
By forcibly exhausting the air in the inner surface space behind the cover 12 from the opening surface of the reflecting mirror 1,
2, an air flow is generated toward the back of the mirror 2, and due to the air flow, the warm air in the inner space of the reflecting mirror 1 heated by the heat generated by the inverter fluorescent lamp 5 is captured in front of the opening surface of the reflecting mirror 1. Movement toward the object can be prevented.

The points described above have the following advantages.
Generally, there are many types of objects to be photographed, but these objects are not always heat-resistant, and are, for example, plants such as flowers, foods such as Japanese confectionery, cakes, and the like, and are sensitive to heat. There are also things. In the case of such an object to be photographed, it is necessary to minimize the influence of the heat generated by the lighting device at the time of photographing. I can't. Therefore, in order to minimize the influence of heat generation on a subject that is weak to heat, it is necessary to suppress the heat generated by the fluorescent lamp illuminating device as much as possible, and secondly to capture the heat generated by the fluorescent lamp illuminating device as much as possible. It is necessary to prevent it from moving toward the object. From this point of view, as described above, the lighting device of the present embodiment can firstly suppress a rise in the temperature of the inner surface space of the reflecting mirror 1 in which air directly connected to the air around the object to be photographed stays. . Second, in addition to the above, the warm air heated by the heat generated by the inverter fluorescent lamp 5 due to the flow of air from the opening surface of the reflecting mirror 1 to the rear of the cover 12 captures the image in front of the opening surface of the reflecting mirror 1. Movement toward the object can be prevented. Therefore, by the synergistic effect of the above two factors, the influence of the heat generated by the fluorescent lamp illuminating device on the heat-sensitive imaging object can be reduced even more effectively. Therefore, it is possible to provide an illuminating device that is less affected by heat generation on an imaging target that is vulnerable to heat.

In this embodiment, one communication hole 16 between the air gap and the warm air collecting space and one suction hole 19 are provided near the top of the cover 12 and near the bottom of the reflector 1, respectively. There may be a plurality of places and a plurality of places. In that case, a further cooling effect can be expected. Further, in this embodiment, since the blower 15 is disposed above the inside of the warm air collecting space 14 in the column mounting portion 2, the exhausted air is discharged upward, and behind the lighting device, Although there is an advantage that the exhaust air does not hit the operator who operates this lighting device and the operator does not feel uncomfortable, there is also a method of disposing the blower 15 behind the inside of the warm air collecting space 14. In that case, the flow of air becomes smoother, and a further cooling effect can be expected.

A commercial power supply is used as a power supply for the lighting apparatus of the present embodiment. The commercial power supply is connected to the power supply section 8 of the inverter fluorescent lamp 5 and the blower 15 through the power supply socket 9.
Supplied to Although not shown, a power plug and a power cable for this purpose are attached to the lighting device of the present embodiment, and internal wiring for supplying power from the power cable to the power supply socket 9 and the blower 15 is provided in the present embodiment. And a switch for turning on and off the power supply are provided on the upper surface of the column mounting portion 2 of this embodiment.
Here, by storing the internal wiring for supplying the power from the power cable to the power supply socket 9 in the gap 13, the internal wiring can be prevented from being exposed to the outside, and a lighting device with excellent aesthetic appearance can be provided.

In this embodiment, since the inverter fluorescent lamp 5 is used, since the substantial lighting means is built in the inverter fluorescent lamp 5, the above-mentioned power plug, power cable, internal wiring and switch are provided in the lighting device. As a result, the lighting means is constituted. However, it is not limited to the method using the inverter circuit built into the fluorescent lamp,
There is also a method in which an inverter circuit is built in the support mounting portion 2. In this way, this inverter circuit also
It is included in the lighting means as the lighting device described above. In this case, the driving inverter circuits for the plurality of fluorescent lamps can be integrated into one, which can contribute to the cost reduction of the lighting device.

Next, a second embodiment will be described. FIG.
FIG. 3 is a vertical sectional view of a light projecting unit of this embodiment. This embodiment is exactly the same as the first embodiment except that the lighting device of the first embodiment is not provided with an intake hole 19 that is provided near the bottom of the reflecting mirror 1 and penetrates the reflecting mirror 1.

In the second embodiment, since the structure is somewhat simpler than that of the second embodiment, it is possible to provide a lighting device which is easy to manufacture and inexpensive. Further, the following effects are provided among the effects described in the first embodiment. That is, only by using the inverter fluorescent lamp of the standard specification, it is possible to generate intense light equivalent to or higher than that of the conventional fluorescent lamp lighting device. In addition, since the inverter fluorescent lamps are erected radially,
The central light can generate a strong luminous flux. Therefore, an illumination device suitable for spot illumination that illuminates a narrow area strongly can be provided.
In addition, since the inverter fluorescent lamp of the standard specification is used, it is possible to provide a lighting device which is inexpensive and easily available. Also, due to the inflow of air from the opening surface of the reflecting mirror by the blower described in the first embodiment, the temperature rise in the inner space of the reflecting mirror is suppressed, and the flow of air from the opening surface of the reflecting mirror to the back of the cover 12. Although the heat generated by the inverter fluorescent lamp cannot be prevented from moving to the object to be photographed, the internal space of the reflecting mirror can be prevented by cooling from the back of the reflecting mirror due to the flow of air in the gap between the reflecting mirror and the cover. Temperature rise can be suppressed. Therefore, it is possible to provide an illumination device that is less affected by heat generation on an imaging target that is vulnerable to heat.

Next, a third embodiment will be described. FIG.
FIG. 3 is a vertical sectional view of a light projecting unit of this embodiment. In the present embodiment, the metal cover 12 provided on the outer surface of the reflecting mirror 1 and the blower 15 incorporated in the warm air collecting space 14 are removed from the lighting device of the second embodiment. This is exactly the same as the two embodiments. In this embodiment, the column mounting part 2 is directly joined to the outer surface of the reflecting mirror 1.

In the third embodiment, the first
Compared with the embodiment and the second embodiment, since the structure is much simpler, it is possible to provide a lighting device which is easy to manufacture and inexpensive. Further, the following effects are provided among the effects described in the second embodiment. That is, only by using the inverter fluorescent lamp of the standard specification, it is possible to generate intense light equivalent to or higher than that of the conventional fluorescent lamp lighting device. In addition, since the inverter fluorescent lamps are arranged radially upright, it is possible to generate a luminous flux with strong central light. Therefore, an illumination device suitable for spot illumination that illuminates a narrow area strongly can be provided. In addition, since the inverter fluorescent lamp of the standard specification is used, it is possible to provide a lighting device which is inexpensive and easily available.

In the lighting device of the above-described embodiment, the stand type has been described. However, the present invention is not limited to the stand type, and a lighting device in which the light projecting portion is suspended from a ceiling or the like can be considered.

[0036]

The lighting device of the present invention has the following effects. Since the lighting device according to claim 1 can store more inverter fluorescent lamps than the conventional fluorescent lamp lighting device, the number of used fluorescent lamps can be increased without using an inverter fluorescent lamp dedicated to photographing. Only by using the standard inverter fluorescent lamp, it is possible to generate intense light equal to or higher than that of the conventional fluorescent lamp lighting device. In addition, since the inverter fluorescent lamps are erected radially, it is possible to generate a strong luminous flux of the central light. Therefore, an illumination device suitable for spot illumination that illuminates a narrow area strongly can be provided. In addition, since the inverter fluorescent lamp of the standard specification is used,
It is possible to provide a lighting device in which replacement fluorescent lamps can be easily obtained when consumed at a low price.

The lighting device according to the second, third and fourth aspects has the same effect as the lighting device according to the first aspect.

The lighting device according to the fifth aspect has the following effects in addition to the effects of the lighting device according to the first aspect. In other words, the cooling from the back surface of the reflecting mirror due to the flow of air in the gap between the reflecting mirror and the cover caused by the blower can suppress a rise in the temperature of the inner surface of the reflecting mirror. A lighting device with less influence can be provided. In addition, since the internal wiring is housed in the gap, a lighting device having an excellent appearance of the fluorescent lamp lighting device can be provided.

The lighting device according to the sixth aspect has the following effects in addition to the effects of the lighting device according to the fifth aspect. That is, not only cooling from the back surface of the reflecting mirror due to the flow of air in the gap between the reflecting mirror and the cover caused by the blower,
By cooling the inverter fluorescent lamp and the reflecting mirror directly from the surface by the inflow of air from the opening surface of the reflecting mirror, it is possible to suppress a temperature rise in the inner space of the reflecting mirror. In addition, due to the flow of air from the opening of the reflector to the back of the cover caused by the blower, the warm air in the inner space of the reflector, heated by the heat generated by the inverter fluorescent lamp, is taken in front of the opening of the reflector. It can prevent you from moving towards things.
Therefore, it is possible to provide an illuminating device that is less affected by heat generation on an imaging object that is vulnerable to heat than the illuminating device according to the fifth aspect.

[Brief description of the drawings]

FIG. 1 is an external front view of a first embodiment.

FIG. 2 is an external side view of the first embodiment.

FIG. 3 is a side view of an inverter fluorescent lamp.

FIG. 4 is a plan view of an invatar fluorescent lamp.

FIG. 5 is a longitudinal sectional view of a light emitting unit according to the first embodiment.

FIG. 6 is a cross-sectional view of a light emitting unit according to the first embodiment.

FIG. 7 is a front view of the light emitting unit excluding the fluorescent lamp of the first embodiment.

FIG. 8 is a longitudinal sectional view of a reflecting mirror of an application example 1 of the first embodiment.

FIG. 9 is a longitudinal sectional view of a reflecting mirror according to an application example 2 of the first embodiment.

FIG. 10 is a longitudinal sectional view of a light emitting unit according to a second embodiment.

FIG. 11 is a longitudinal sectional view of a light emitting unit according to a third embodiment.

FIG. 12 is a perspective view of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Reflecting mirror 2 Post mounting part 3 Post 4 Base 5 Inverter fluorescent lamp 6 Fluorescent tube part of inverter fluorescent lamp 7 Base part of inverter fluorescent lamp 8 Power supply part of inverter fluorescent lamp 9 Power supply socket 10 Power supply socket of power supply socket 11 Spacer 12 Cover Reference Signs List 13 air gap 14 warm air collecting space 15 blower 16 communication hole between air gap and warm air collecting space 17 blower holding plate 18 warm air collecting space exhaust hole 19 intake hole 21 central axis of reflecting mirror 22 convergence point 23 radial line 24 universal joint 25 tightening handle A Conventional fluorescent lighting equipment

Claims (6)

[Claims] 1. A reflecting mirror 1 having a concave section with an open front surface.
A plurality of inverter fluorescent lamps 5 in which the fluorescent tube section 6 is bent and a power supply section 8 is provided at one end, a plurality of power supply sockets 9 disposed on the inner surface of the reflecting mirror 1, and the inverter fluorescent lamp 5 Lighting means for turning on the light, and connecting each of the inverter fluorescent lamps 5 having one end fitted to the power supply socket 9 to a point on the central axis 21 on the front side of the reflecting mirror 1 at the other end of the fluorescent tube tip. An illumination device, which is erected radially so as to converge toward 22. 2. A reflecting mirror 1 having an open front surface and a concave cross section.
A plurality of inverter fluorescent lamps 5 in which the fluorescent tube section 6 is bent and a power supply section 8 is provided at one end, a plurality of power supply sockets 9 disposed on the inner surface of the reflecting mirror 1, and the inverter fluorescent lamp 5 A lighting means for lighting is provided, and each of the inverter fluorescent lamps 5 whose one end is fitted to the power supply socket 9 is connected to the central axis 2 of the reflecting mirror 1 by the fluorescent tube portion 5.
An illumination device, which is arranged upright on the front side of the reflection mirror 1 so as to be parallel to the illumination device 1. 3. A bowl-shaped reflecting mirror 1 having an open front surface, a plurality of inverter fluorescent lamps 5 having a fluorescent tube portion 6 bent and a power supply portion 8 provided at one end, and disposed on the inner surface of the reflecting mirror 1. A plurality of power supply sockets 9, and lighting means for lighting the inverter fluorescent lamps 5, wherein each of the inverter fluorescent lamps 5 having one end fitted to the power supply sockets 9 is connected to the other end of the fluorescent tube part. Converges toward a point 22 on the central axis 21 on the front side of the reflecting mirror 1,
A lighting device that stands radially. 4. A bowl-shaped reflecting mirror 1 having an open front surface, a plurality of inverter fluorescent lamps 5 having a bent fluorescent tube section 6 and a power supply section 8 provided at one end, and disposed on an inner surface of the reflecting mirror 1. A plurality of power supply sockets 9, and lighting means for lighting the inverter fluorescent lamp 5, and each of the inverter fluorescent lamps 5 having one end fitted to the power supply socket 9, and the fluorescent tube part 6 of the inverter fluorescent lamp 5. An illuminating device, which is erected on the front side of the reflecting mirror 1 so as to be parallel to the central axis 21 of the reflecting mirror 1. 5. A cover 12 which covers an outer surface of the reflecting mirror 1 and is provided with a gap 13 between the reflecting mirror 1 and the cover 12.
And the warm air collecting space 1 provided in communication with the space 13
4 and the air gap 1 provided in the warm air collecting space 14.
The lighting device according to any one of claims 1 to 4, further comprising: a blower (15) for forcibly exhausting the warm air remaining in the cover (3) behind the cover (12). 6. A cover 12 which covers an outer surface of the reflector 1 and is provided with a gap 13 between the reflector 1 and the cover 12.
A suction hole 19 opened on the inner surface of the reflecting mirror 1 and communicating with the gap 13, a warm air collecting space 14 provided in communication with the gap 13, and provided in the warm air collecting space 14; 5. The blower according to claim 1, further comprising: a blower for forcibly exhausting warm air remaining in the gap and an inner space of the reflector toward the rear of the cover. Lighting equipment.