JPH09231825A - Fluorescent lamp device and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the light absorptive loss by the case of a luminaire by forming a fluorescent lamp of a specific light emission tube, giving a specific value range to the ratio of the overall length of the lamp to the exposed length of the tube, and also giving a specific value range to the angle which the tangential line tying the tube center to the case periphery forms relative to the center axis. SOLUTION: This fluorescent lamp device has a light emission tube 1 in such a configuration that six straight bulbs 1a are connected together at the end part 1c and a part near the end part on the base end side so that one bent discharge path is formed as a whole, where electrodes are furnished at the two ends. A case 3 is structured so that the bas end of the tube 1 is supported by one end 3b and a base piece 4 is provided at the other end, and accommodates a lighting circuit to light the light emission tube so that the total power consumption becomes 25 W or below. The conditions D/L<=0.55 and 2θ<=57 deg. should be satisfied, where L is overall length of lamp, D is exposed length of tube, and θ is the mean of angles formed on the center line by the tangential line tying to the case periphery centering on the position D/2 away from the tip of the tube 1 on the lamp axis.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a fluorescent lamp device and a lighting fixture.

[0002]

2. Description of the Related Art A plurality of straight tube bulbs are arranged in parallel, the internal spaces of the bulbs are connected at their respective ends, and one bent discharge path is formed as a whole, and filament electrodes are provided at both ends of the discharge path. The formed (sealed) arc tube and the end of the arc tube where the electrodes are arranged are supported at one end, and the other end is
2. Description of the Related Art A fluorescent lamp device is known that includes a case having a base that fits in a socket and a lighting circuit device that is built in the case and that lights an arc tube at a high frequency.

As the fluorescent lamp device, for example, a lamp whose outer diameter is 12.5 mm and which achieves a brightness equivalent to that of an incandescent lamp of 100 W or a brightness equivalent to that of an incandescent lamp of 60 W is widely used. .

By the way, in a fluorescent lamp device which can obtain a brightness equivalent to that of an incandescent lamp of 100 W, the discharge length of the arc tube is long,
Therefore, in general, the total exposed length of the lamp in the axial direction of the device is long. In addition, even in a fluorescent lamp device that can obtain a brightness equivalent to that of an incandescent lamp of 100 W, it is possible to shorten the exposed length of the lamp by complicating the bending of the discharge path in response to the demand for compactness. It is considered. On the other hand, in a fluorescent lamp device capable of obtaining a brightness equivalent to that of an incandescent lamp of 60 W, the discharge length of the arc tube is short, and therefore, the total exposed length of the lamp in the axial direction of the device is relatively short.

[0005]

However, in the structure of the fluorescent lamp device, if the total exposed length of the lamp in the axial direction of the device becomes short, the following drawbacks are noticeable. That is, when the exposed length of the lamp becomes shorter, the light absorption by the case becomes relatively large. Until now, the circuit loss was large, so it was more important to reduce the circuit loss than to reduce the optical absorption loss.
Since the circuit loss has been reduced, the light absorption loss has come to the fore, and in this respect, the lamp efficiency is impaired.

An object of the present invention is to provide a fluorescent lamp device in which light absorption loss due to a case of an arc tube is reduced and a lighting fixture equipped with the fluorescent lamp device.

[0007]

According to the fluorescent lamp device of the present invention, six straight tube bulbs are connected to the inner space of the bulb near the respective end portions on the end side and the base end side. An arc tube in which one curved discharge path is formed as an electrode, and electrodes are disposed near the base end sides of the bulbs located at both ends of the discharge path; and the base end side of the arc tube is supported at one end, A case having a base at the end; a lighting circuit housed inside the case and lighting the arc tube so that the total power consumption is 25 W or less, and the total length from the tip of the base to the tip of the arc tube is L,
The exposed length of the arc tube from the tip of the arc tube to the case is D, and the position distant from the tip of the arc tube by D / 2 on the center axis of the device is the arc tube center, and the tangent line connecting the center of the arc tube and the peripheral surface of the case is the device. When the average value of the angle formed with the central axis is θ, the relationship is D / L ≦ 0.55 2θ ≦ 57 °.

The arc tube has the same shape as the arc tube used in the compact fluorescent lamp whose model name is FDL and is defined by JIS-C7601-1989. Therefore, the arc tube may be formed by connecting three bulbs that are bent in a U shape, or may be a combination of three bulbs that are so-called H tubes that are connected. Will meander.

The case includes, but is not limited to, one having a substantially spherical appearance. In the case where the appearance is a substantially spherical shape or a substantially cylindrical shape, the cross section perpendicular to the axial direction of the device becomes a substantially circular shape, and in this case, the angle formed by the tangent line connecting the center of the arc tube and the peripheral surface of the case with the central axis of the device is It is equal no matter which direction you draw the tangent line. However, in the case of a cube,
Since the angle differs depending on the direction of the tangent line, it is sufficient to measure at multiple points and average them.

The lighting circuit is not particularly limited, but a high frequency lighting circuit with a small circuit loss is suitable. The relationship of D / L ≦ 0.55 means that the exposed length of the arc tube is small. Further, the relationship of 2θ ≦ 57 ° means that the case has a reduced cross-sectional size. Here, the value of D / L is 0.
When it exceeds 55, the luminescence center moves away from the case, and the problem of light absorption does not increase. That is, when D / L exceeds 0.55, there is no difference in light absorption which is a practical problem due to the difference in θ. On the other hand, when 2θ exceeds 57 °, the amount of light absorption in the case cannot be reduced.

The power consumption of 25 W or less means 25
This is because the fluorescent lamp device that exceeds W has a long arc tube and the problem of light absorption due to the case is less likely to appear.

In the fluorescent lamp device according to the second aspect of the present invention, the six straight tube bulbs are respectively arranged at the corner positions of the hexagon, and the internal space of the bulb is close to the tip end side and the base end side end portion. An arc tube that is connected to form a single bent discharge path, and electrodes are disposed near the bulb base end side located at both ends of the discharge path; and the base end side of the arc tube is supported at one end And a case with a base at the other end, the cross section of which is orthogonal to the tube axis of the straight tube bulb of the arc tube, has a substantially circular cross section; the case is housed inside the case and emits light with a total power consumption of 25 W or less. A lighting circuit for lighting the tube is provided, and the total length from the tip of the base to the tip of the arc tube is L, the exposure length of the arc tube from the tip of the arc tube to the case is D, and the direct exposure of the arc tube around the central axis of the device The radius of the circle that touches the outer circumference of the pipe valve group is r, and the diameter of the support case When the R, and having a relationship of D / L ≦ 0.55 r / R ≦ 0.50.

In the present invention, the arc tube, the case, the lighting circuit, the power consumption, etc. are the same as in the case of the invention of claim 1.

The relationship of D / L ≦ 0.55 and r / R ≦ 50 is that the exposed length of the arc tube is small and the size of the cross section of the case is relatively small with respect to the exposed part of the arc tube. It means to do.

According to a third aspect of the present invention, in the fluorescent lamp device according to the first or second aspect, the inner diameter of the straight tube bulb is
It is 12 mm or less, and the lighting circuit is a high-frequency lighting circuit.

A fluorescent lamp device according to a fourth aspect of the present invention is the fluorescent lamp device according to any one of the first to third aspects, wherein the case has a substantially circular cross section perpendicular to the axis of the device, and the base is a screw-type base. The outer diameter Bd and the outer diameter Cd of the case have a relationship of Bd / Cd ≧ 0.45.

A lighting fixture according to a fifth aspect of the present invention comprises the fluorescent lamp device according to any one of the first to fourth aspects, and a lighting fixture main body equipped with the fluorescent lamp device.

The luminaire main body includes, for example, an incandescent lamp fixture. Any device may be used as long as it has a socket that fits with the base.

The fluorescent lamp device according to the first aspect of the present invention is attached to a lighting fixture having a socket for an incandescent light bulb or the like to be turned on. Since the arc tube has the same shape as the FDL type, the length of the arc tube exposed from the case in the device axial direction becomes smaller. Therefore, the light emission center approaches the case, and the light emission amount on the case increases due to the light emission center approaching the case. At this time, generally, most of the light emitted to the case is reflected, but the amount of absorbed light cannot be ignored. However, in this fluorescent lamp device, since the size of the cross section of the case is made small, the light irradiation amount to the case can be reduced, and the light absorption amount in the case can also be reduced. That is, the amount of light irradiation to the case is reduced and the amount of light absorption is reduced / suppressed, and the fluorescent lamp device functions as a lamp with improved lamp efficiency.

The fluorescent lamp device according to the second aspect of the present invention is attached to a lighting fixture having a socket for an incandescent light bulb and the like, and is turned on. Also, since the arc tube is configured in the same shape as the FDL type, the length of the arc tube exposed from the case in the device axial direction is reduced. In other words, by reducing the exposed length of the arc tube and setting the size of the cross section of the case to be smaller than the exposed part of the arc tube, the light irradiation amount and light absorption amount for the case can be reduced and suppressed. Is planned,
Functions as a fluorescent lamp device with improved lamp efficiency.

In the fluorescent lamp device of the third aspect of the present invention, since the tube diameter is small, the discharge length is shorter than that of the fluorescent lamp apparatus having the same lamp input and having a large tube diameter. Therefore, the length of the arc tube exposed from the case in the device axial direction becomes small, and the light emission center comes close to the case. However, since the size of the cross section of the case is reduced, the light irradiation amount to this case can be reduced, and the light absorption amount in the case can also be reduced.

In the fluorescent lamp device according to the invention of claim 4, the supporting case is such that the shape of the case is substantially circular in a cross section perpendicular to the axis of the device and the case has a relationship of Bd / Cd ≧ 0.45 with respect to the base. Is getting smaller. Therefore, it is easy to reduce the light irradiation amount to the case and the light absorption amount to the case.

Since the luminaire of the fifth aspect of the present invention has the fluorescent lamp device of the first to fourth aspects, a bright luminaire can be obtained because the light absorption loss of the fluorescent lamp device is reduced.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION A fluorescent lamp device according to the present invention will be described with reference to FIGS.

FIG. 1 is a front view of one embodiment, FIG. 2 is a bottom view of the same, and FIG. 3 is a partially cutaway sectional view of FIG.

The fluorescent lamp device includes an arc tube 1, a case 3 that supports the arc tube 1 and has a lighting circuit component 2 built therein.
It is composed of a base 4 provided at one end of the case 3. Here, the arc tube 1 is arranged such that six straight tube bulbs 1a are located in a hexagonal shape, and each end portion is connected by connecting portions 1b and 1c, and the inner space of the bulb as a whole is one. They are connected so that a bent discharge path is formed. This shape is the same as the arc tube used in the compact fluorescent lamps whose model name is FDL, which is specified in JIS-C7601-1989. In other words, from a different point of view, it is a shape in which three U-shaped bent valves are connected.

Filament electrodes 5 are provided at both ends of the discharge path. Here, the two ends 1d having the filament electrode 5 and the two ends 1e having no electrode are juxtaposed. In addition, while there are two connecting portions 1b of the straight tube valve 1a near the end portion 1d side where the filament electrode 5 is formed (sealed), the filament electrode 5
There are three connection portions 1c on the other end side where no is formed. The connecting portion 1c is formed by a U-shaped bend of a straight pipe valve having an outer diameter of 12.5 mm and an inner diameter of 10.5 mm, and the connecting portion 1b has an outer diameter of 12.5 mm and an inner diameter between the side walls of the corresponding straight pipe valve 1a. Is formed by connecting with a 10.3 mm glass tube. Further, in the arc tube 1, each straight tube bulb 1a has a length of 75 mm and a discharge path length of 310 mm. Inside the arc tube 1, several milligrams of mercury and several torr of argon gas are enclosed. Furthermore, the filament electrode 5 is implanted in a flare stem (not shown).

One end of the arc tube 1 is inserted into a fitting hole 3a formed in the case 3, and is fixed with a heat-resistant silicone adhesive 7. Therefore, from the flat portion 3b of the case 3 supporting the arc tube 1 to the connecting portion 1c at the tip of the arc tube 1.
Up to the distance, that is, the exposed axial total length D of the arc tube 1 is 75 mm.

Further, the base 4 is an E26 type (the outer diameter B of the base 4 is
d is about 26 mm), the height of the base 4 is about 30 mm including the neck portion 3c of the case 3, and the spherical bulging portion of the case 3 is about 30 mm.
The length is 40mm and the total length L is 145mm. That is, the ratio of the exposed length D of the arc tube 1 from the tip of the arc tube 1 to the case 3 and the total length L from the tip of the base 4 to the tip of the arc tube 1 is D / L = 0.51.

Further, since the maximum diameter Cd of the spherical bulging portion of the case 3 is 50 mm, the ratio of the outer diameter Bd of the mouthpiece 4 to the maximum diameter Cd of the case 3 is Bd / Cd = 0.52.

Furthermore, the angle θ formed by the center of the exposed portion of the arc tube 1, that is, the tangent line T from the light emission center 0 to the peripheral surface (surface) of the case 3 and the axis passing through the light emission center 0.
Was 2θ = 55 °. In the figure, 7'denotes a heat-resistant silicone adhesive that joins the straight pipe valves 1a without causing any optical hindrance.

The lighting circuit component 2 in the case 3 is the case 3
It is mounted on the circuit board 8.

FIG. 5 is a circuit diagram of a lighting circuit housed in the case 3. The lighting circuit 9 uses a well-known series inverter 11 including a resonance circuit in which an inductance L2 and a capacitor C10 are connected in series as a high-frequency power circuit, and a capacitor C10 is connected in parallel to the arc tube 1 as a starting circuit. Therefore, both ends of each filament electrode 5 are connected to the power supply circuit side at the same potential. With such a circuit, no residual heat current flows through the filament electrode 5 of the arc tube 1 even at the time of starting, and the arc tube 1 is easily started and lit.

The start-up lighting of the fluorescent lamp device is as follows. That is, when the power is turned on, the series inverter 11 resonates and the high voltage generated on both sides of the capacitor C10 causes the arc tube 1 to start discharging.

FIG. 5 shows the center of the exposed portion of the arc tube 1 of the fluorescent lamp device, that is, the tangent line T from the light emission center 0 to the peripheral surface (surface) of the support case 3 and the axis line passing through the light emission center 0. FIG. 6 is a characteristic diagram showing a relationship between an angle θ formed and brightness. Note that this characteristic diagram is obtained by measuring the change in brightness by changing θ by changing the maximum diameter Cd of the case or changing the curvature of the spherical surface in the above fluorescent lamp device. The vertical axis is the relative value of brightness, and the horizontal axis is the value of 2θ.

As can be seen from FIG. 5, the smaller θ is, the more the brightness is improved, and the measurement result shows that the brightness is sharply reduced when 2θ exceeds 57 °. Here, the difference in brightness due to the θ is caused by the ratio of the exposed length D of the arc tube 1 from the tip of the arc tube 1 to the case 3 to the total length L from the tip of the base 4 to the tip of the arc tube 1, When D / L is small, for example, when D / L is set to 0.58, the brightness difference as described above does not appear even if θ is decreased. In order to satisfy the range of θ as described above, it is preferable to suppress the maximum diameter of the case 3, but the outer diameter Bd of the base 4 and the case 3
By setting the ratio of Bd / Cd to the maximum diameter Cd of 0.45 or more, 2θ can be easily made smaller than 57 °.

FIG. 6 is a perspective view of a lighting fixture equipped with the above fluorescent lamp device. This luminaire is a ceiling-embedded downlight, and it is intended to improve the fixture compatibility of a compact fluorescent lamp device. Here, the ceiling-embedded downlight is a lighting fixture body 12 that is embedded in the ceiling.
And a fluorescent lamp device 13, and the lighting fixture main body 12
Has a socket into which the E4 base 4 is fitted.

Next, another embodiment of the fluorescent lamp device will be described with reference to FIGS. 7 and 8.

FIG. 7 is a front view, and FIG. 8 is a bottom view showing an arrangement relationship of straight tube bulbs of the bent arc tube.

The fluorescent lamp device has the same basic structure as that of the first embodiment, and the arc tube 1, the case 3 that supports the arc tube 1, and the lighting circuit part 2 is built therein, and the case 3. It is composed of a base 4 provided at one end of the.

That is, the arc tube 1 has six straight tube bulbs 1a.
Are arranged in parallel so that they are located in a hexagon,
The respective end portions are connected by connecting portions 1b and 1c, and the internal space of the bulb is connected so as to form one bent discharge path as a whole. A filament electrode 5 is provided at both ends of the discharge path, and two ends 1d having the filament electrode 5 and two ends 1e having no electrode are juxtaposed.

Further, while there are two connecting portions 1b of the straight pipe valve 1a which are close to the end portion 1d side where the filament electrode 5 is formed, the other end side where the filament electrode 5 is not formed is connected. There are three parts 1c. The connecting portion 1c is formed by a U-shaped bend of a straight pipe type valve having an outer diameter of 12.5 mm and an inner diameter of 10.5 mm, and the connecting portion 1b has an outer diameter of 12.5 mm between the side walls of the corresponding straight pipe valve 1a. The inner diameter is formed by connecting with a 10.3 mm glass tube.

Further, in the arc tube 1, each straight tube bulb 1a has a length of 75 mm and a discharge path length of 310 mm.
A few milligrams of mercury and a few torr of argon gas are enclosed inside, and the filament electrode 5 is further implanted in a flare stem (not shown).

One end of the arc tube 1 is inserted into a fitting hole 3a formed in the case 3, and is fixed with a heat-resistant silicone adhesive. The flat part 3b of the case 3 extends from the tip of the arc tube 1 to the tip. To the connecting portion 1c, that is, the exposed axial total length D of the arc tube 1 is 87.5 mm. Also, the base 4
Is an E26 type (the outer diameter Bd of the base 4 is about 26 mm), the height of the base 4 is about 30 mm including the neck portion 3c of the case 3, and the spherical bulge of the case 3 is about 72.5 mm, and the total length is L is 160 mm
It is. Further, the case 3 has a fitting hole 3a forming surface for supporting the arc tube 1 in a substantially circular shape having a diameter R of about 55 mm. That is, the total length from the tip of the base 4 to the tip of the arc tube 1 is L, the exposed length of the arc tube 1 from the tip of the arc tube 1 to the support case 3 is D, and the central axis O of the device is the center O to expose it. Assuming that the radius of the circle A contacting the outer circumference of the straight pipe valve 1a group is r and the end surface diameter R of the case 3 is D / L = 0.55, r / R =
It is 0.38.

In addition, the configuration of the lighting circuit in the case 3, the simple starting method, the input power to the arc tube 1 and the like are the same as those in the above-mentioned embodiment, and when the lighting operation is performed, the same operational effect is obtained. Admitted. That is, D / L ratio and r /
The smaller the R ratio, the better the brightness, and the measurement result shows D / L
= 0.55 and when r / R = 50 is exceeded, the brightness drops sharply. Here, the difference in brightness depending on the D / L ratio and the r / R ratio appears because the exposed length D of the arc tube 1 from the tip of the arc tube 1 to the case 3 and the tip of the base 4 to the tip of the arc tube 1. Up to the total length L, D / L is small. For example, when D / L is set to 0.60 or more, D / L
Even if the L ratio and the r / R ratio were reduced, the above-mentioned difference in brightness was not observed. In order to satisfy the range of the D / L ratio as described above, it is preferable to suppress the maximum diameter of the case 3, but the ratio Bd / Cd of the outer diameter Bd of the base 4 to the maximum diameter Cd of the case 3 is preferable. Should be 0.45 or more.

The present invention is not limited to the above examples, and various modifications can be made without departing from the spirit of the invention. For example, the arc tube may have a structure in which three sets of so-called H tubes are combined in place of the bending type of one bulb (or a combination of U-shaped bulbs).

[0047]

According to the fluorescent lamp device of the first aspect of the present invention, the light irradiation amount to the case can be reduced, and the light absorption amount in the support case can also be reduced. Therefore, a bright fluorescent lamp device can be provided.

According to the fluorescent lamp device of the second aspect of the present invention, the amount of light irradiation to the case can be reduced and the amount of light absorption in the case can be reduced as in the above case. Therefore, a bright fluorescent lamp device can be provided.

In the fluorescent lamp device of the third aspect of the present invention, the tube diameter is small and the light emission center approaches the case, but the amount of light absorption in the case can be reduced. Therefore, a bright fluorescent lamp device can be provided.

In the fluorescent lamp device according to the invention of claim 4, the case has a substantially circular cross-sectional shape, and the case has a relationship of Bd / Cd ≧ 0.45 with respect to the base.
It is possible to easily reduce the light irradiation amount to the case and the light absorption amount in the case. Therefore, a bright fluorescent lamp device can be provided.

Since the luminaire of the fifth aspect of the present invention has the fluorescent lamp device of the first to fourth aspects, a bright luminaire can be obtained because the light absorption loss of the fluorescent lamp device is reduced.

[Brief description of drawings]

FIG. 1 is a front view of a fluorescent lamp device according to an embodiment of the present invention.

FIG. 2 is a bottom view of the same.

FIG. 3 is a cutaway sectional view of the same portion.

FIG. 4 is a lighting circuit diagram of the fluorescent lamp device according to the embodiment.

FIG. 5 is a characteristic diagram showing a relationship between θ and brightness of the fluorescent lamp device of the embodiment.

FIG. 6 is a perspective view of a lighting device according to an embodiment of the present invention.

FIG. 7 is a front view of a fluorescent lamp device according to another embodiment of the present invention.

FIG. 8 is a bottom view of the same.

[Explanation of symbols]

 1 ... Arc tube 1a ... Straight tube bulb 1b, 1c ... Connection part 1d, 1e ... End 2 ... Lighting circuit component 3 ... Case 4 ... Base 5 ... Filament electrode 9 ... Lighting circuit, 12 …… Lighting equipment body 13 …… Fluorescent lamp device

Claims (5)

[Claims] 1. A straight bulb is formed as a whole by connecting six straight tube bulbs to the inner space of the bulb near the ends on the end side and the base end side, respectively, and the discharge path is formed. An arc tube in which electrodes are disposed near the base end side of the bulb located at both ends of the bulb; and a case that supports the base end side of the arc tube at one end and has a base at the other end; And a lighting circuit for lighting the arc tube so that the power consumption of the arc lamp is 25 W or less, the total length from the tip of the base to the tip of the arc tube is L, the exposure length of the arc tube from the tip of the arc tube to the case is D, the device When the average value of the angle formed by the tangent line connecting the center of the arc tube and the peripheral surface of the case to the central axis of the device is θ, with the position of the arc tube center being D / 2 away from the tip of the arc tube on the center axis of /L≦0.55 2θ ≦ 57 °, which is a fluorescent lamp device. 2. Six straight pipe valves are respectively arranged at the corner positions of a substantially hexagonal shape, and the internal spaces of the valves are connected in the vicinity of the end portions of the valve front end side and the base end side, so that one bend is formed as a whole. An arc tube in which a discharge path is formed and electrodes are arranged near the bulb base end sides located at both ends of the discharge path; a base end side of the arc tube is supported at one end, and a base is provided at the other end. A case with a substantially circular cross section in the direction orthogonal to the tube axis of the straight tube bulb of the arc tube; housed inside the case, the overall power consumption is
A lighting circuit for lighting the arc tube so that it becomes 25 W or less; and the total length from the tip of the base to the tip of the arc tube is L, the exposure length of the arc tube from the tip of the arc tube to the case is D, and the central axis of the device is When the radius of the circle that is in contact with the outer circumference of the straight tube bulb group where the arc tube is exposed as the center is r and the diameter of the support case is R, the relationship of D / L≤0.55 r / R≤0.50 is established. Fluorescent lamp device. 3. The inner diameter of the straight pipe valve is 12 mm or less,
The fluorescent lamp device according to claim 1 or 2, wherein the lighting circuit is a high frequency lighting circuit. 4. The case has a substantially circular cross section perpendicular to the axis of the device, and the base is a screw-type base, and the outer diameter Bd of the base is
4. The fluorescent lamp device according to claim 1, wherein the outer diameter Cd of the case and the outer diameter Cd of the case have a relationship of Bd / Cd ≧ 0.45. 5. A lighting fixture comprising: the fluorescent lamp device according to claim 1; and a lighting fixture main body equipped with the fluorescent lamp device.