JPS58181263A - Fluorescent lamp device - Google Patents

Abstract

PURPOSE:To prevent any reduction of the luminous efficiency of a fluorescent lamp device by joining a non-linear fluorescent lamp and a globe by means of a thermoconductive medium at the time when the lamp is sealed in the globe, and providing concaves and convexes on a part of the surface of the globe which touches the medium. CONSTITUTION:A mount structure 2 which supports both a non-linear fluorescent lamp 1 having a U shape or the like and a glow starter 9 is sealed with both a case 8 provided with a ballast 6 and having a base 7 and a globe 3 made of glass or the like, so that an incandescent lamp can be substituted for the mount structure 2. In addition, the curved surface of the lamp 1 and the curved surface of the globe 3 are thermally joined by means of a thermoconductive medium 4 such as a metal or rubber, and concaves and convexes 5 are provided on a part of the surface of the globe 3 which touches the medium 4. Owing to the above constitution, reduction in the optical output of the lamp 1 can be suppressed by making the temperature of the tube wall of the lamp 1 almost equal to that of the outer wall of the globe 3. Besides, the value of the fluorescent lamp device can be increased by preventing the appearance incongruity of the globe 3.

Description

[Detailed Description of the Invention] The present invention relates to a fluorescent lamp device, particularly one having a structure in which a non-linear fluorescent lamp is sealed with a globe. A shaped fluorescent lamp device was requested, and a non-linear fluorescent lamp such as a U-shaped fluorescent lamp or a sheath-shaped fluorescent lamp was sealed together with a lighting tube inside a translucent globe made of glass or plastic. A single-cap type fluorescent lamp device, which is integrated with a lighting device and has a lamp base completely attached, has been put into practical use.

Since such a device is intended to be used in place of an incandescent light bulb, it is required to be compact, and it is necessary to accommodate the ballast and fluorescent light within a limited space.

However, when a fluorescent lamp is hermetically stored in a small-volume globe, the temperature of the tube wall of the fluorescent lamp increases and reaches above the optimum mercury vapor pressure temperature, resulting in a significant decrease in the luminous efficiency of the fluorescent lamp. Put it away. In order to eliminate this drawback, it is possible to suppress the decrease in luminous efficiency to some extent by providing a large number of ventilation holes in the glove and ballast compartments and cooling the tube wall of the fluorescent lamp. According to the report, insects and other insects enter through the ventilation holes while the bulb is on, making it unsightly, and heat convection attracts dust from the outside, which accumulates on the inner surface of the globe and reduces the transmittance of the globe. The disadvantage is that the luminous flux retention rate inside the lens is poor.

The present invention lowers the tube wall temperature of the non-linear fluorescent lamp and regulates the mercury vapor pressure inside the tube, even when the non-linear fluorescent lamp is sealed inside a translucent globe and is turned on. To provide a fluorescent lamp device that prevents a decrease in luminous efficiency and has a beautiful appearance.

That is, the present invention hermetically seals a non-linear strip light with a globe, thermally couples the non-linear strip light and the globe via a thermally conductive medium excluding gas, and This device is characterized by a fluorescent lamp device in which the surface of the globe on which the thermally conductive medium is located has an uneven surface.

As the thermally conductive medium in the present invention, metals, rubber, polymeric resins, glass, etc. alone or in combination are suitable.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front sectional view of a main part of a fluorescent lamp according to an embodiment of the present invention, and FIG. 2 is a side sectional view of the main part. In these figures, a non-linear strip light 1 is supported on a mount structure 2 made of resin or the like, and the non-linear strip light 1 is sealed with a transparent globe 3. 1
The curved surface portion of the globe 3 is thermally coupled to the maximum curved surface portion of the globe 3 by a thermally conductive medium 4 excluding gas, and the thermally conductive medium 4
Irregularities 5 are provided on the surface of the glove 3 on which the gloves are located.

The fluorescent lamp 1 shown in this embodiment has a tube diameter of about 16 m and a distance between electrodes of about 270 mm, and is formed by forming a linear fluorescent lamp into a U-shape without cutting it.
It is a double-bend type fluorescent lamp that is further bent into a U-shape to form a concavity. The phosphor can be used as appropriate depending on the purpose and use, as in conventional fluorescent lamps, but in this example, a rare earth phosphor was used and the color temperature was adjusted to 2800K.

When the non-linear band lamp is connected to a ballast that carries a tube current of Q23Ai and is lit in the air, it consumes about 9W of power, which is about 65011. A luminous flux of m is obtained. However, when this fluorescent lamp is sealed in a transparent glass globe with a total diameter of 70mm and a length of 80mm and lit using the same ballast, the tube current is Q2.
The power was increased by 1 to 7A, and the luminous flux decreased to about 460°Cm.

Generally, the optimum mercury vapor pressure for fluorescent lamps is when the tube wall temperature is approximately 40°C.
It is well known that when the bulb is turned on in a sealed globe with a small volume, the tube wall temperature rises to 70 degrees Celsius or more, and the luminous flux decreases.

The present invention interposes a thermally conductive medium, such as silicone, between the curved surface portion of the non-linear band light and the largest curved surface portion of the globe 3, so that the heat of the tube wall of the non-linear band light 1 is thermally conductive. The temperature of the tube wall of the non-linear strip lamp 1 at the contact point with the thermally conductive medium 4 is changed to the globe 3 by conducting the heat through the medium 4 to the globe 3.
When the mercury vapor pressure inside the tube was regulated by maintaining it at approximately the same temperature as the surface temperature of the tube, the tube current decreased to Q24A and the luminous flux rose to about 5001 m when lit with the same ballast. The decrease in tube current when the same ballast is used indicates that the mercury vapor pressure inside the tube has clearly decreased, and the rate of decrease in luminous flux has decreased accordingly.

In the above embodiment, the thermally conductive medium 4 is a two-component RTA silicone rubber (Shin-Etsu Chemical Co., Ltd. (7)).
"KE-104RTV j)" fr: approx. 30C
C. Used. Transparent RTV silicone rubber was used because it has excellent weather resistance, heat resistance, and good translucency.Although it is a relatively viscous liquid at room temperature, it hardens in a short period of time when heated and has a rubber-like appearance. It is elastic and has a buffering effect for the non-linear band lamp 1 and the globe 3, and does not emit corrosive gases.

However, even when the glove is transparent and a white diffusion film (not shown) is coated on its inner surface,
It was found that there was a clear difference between the silicone-filled part and the other parts, which caused a very difficult defect in terms of appearance.

As a result of various inspections to eliminate this defect, we found that by creating irregularities on the inner and outer surfaces of the glove where the silicone is located, or on both sides, the silicone-filled part becomes visible in appearance, and there is no discomfort at all. In addition, it was confirmed that the globe surface area of the silicone-filled portion increased, the cooling effect increased, and the luminous flux increased.

FIGS. 3 and 4 are cross-sectional views of the translucent glove 3 according to the present invention, and as shown in FIG. 3, a ring-shaped unevenness may be provided, and as shown in FIG. Hemispherical unevenness may be provided on the surface of the glove.Furthermore, as shown in FIG. 6, unevenness may be provided with a triangular cross section.

The unevenness according to the present invention can be applied to any translucent glove such as glass or plastic, and can of course be applied not only to the silicone-filled portion but also to cases where similar unevenness is provided throughout the globe. . Of course, it is also possible to provide unevenness having a shape other than that shown in the embodiment, and the two dimensions of the unevenness can be determined as appropriate.

FIG. 6 shows an example of application to a fluorescent lamp other than a double-bend type fluorescent lamp, such as a U-shaped fluorescent lamp.
'' The same effects as in each of the embodiments described in Section 2 can be obtained.

FIG. 7 shows an example in which the fluorescent lamp device according to the present invention is integrated with a case 8 equipped with a ballast 6 and a light bulb base 7 attached to form a single-cap type fluorescent lamp device. In this embodiment, a lighting tube 9 is attached to the mount structure 2. A globe 3 made of translucent glass was provided with ring-shaped unevenness 6 only in the portion filled with silicone 4.

The non-linear band lamp shown in this example has a tube outer diameter of approximately 16 mm, an electrode distance of approximately 270 mm, uses a rare earth phosphor, and has a color temperature of approximately 2 mm.
Adjusted to 800K. The glove has a diameter of 75 mm and a length of about 1 mm.
It consists of a glass globe with a diameter of 0.00 mm, a white diffusion film 10i is applied to the inner surface, and a ring-shaped unevenness 6 with a width of about 2 cylinders is provided on the top of the globe, and the outer wall surface of the non-linear band light 1 and the unevenness 6 of the globe 3 are provided. Transparent silicone (Shin-Etsu Chemical Co., Ltd.'s KE-
104RTVJ) is filled with approximately 20CG, approximately 1001
11: It was heated and hardened. When a ballast 6 that flows a current of about 023 A was installed and the light was turned on at 25° C., a luminous flux of about 4801 m was obtained with an input power of 13 W. In addition, there was almost no discomfort in appearance between the silicone-filled part and the other parts of the glove.

As explained above, the present invention seals a non-linear band light with a globe, and a thermally conductive medium excluding gas is interposed between the curved surface portion of the non-linear band light and the largest curved surface of the globe. thermally coupling the non-linear band light and the globe;
9. of the thermally conductive medium.

By providing unevenness on the glove where the heat conduction medium is located, the appearance of the part of the glove where the heat transfer medium is located and the part where it is not can be eliminated, increasing the product value, and improving the cooling effect due to the increase in the surface area of the glove. Phase 1 is compact and has little reduction in light output, so it is useful as a fluorescent lamp device that can be used in place of a light bulb.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a front sectional view of the main part of a fluorescent lamp device which is an embodiment of the present invention, Fig. 2 is a side sectional view of the main part, and Figs. 3 and 4 are respectively FIG. 6 is a partially cutaway sectional view showing another example of the globe. FIG. 6 is a partially cutaway sectional view showing another example of the globe. FIG. 7 is a front sectional view showing an example in which the present invention is applied to a single-capped fluorescent lamp device. 1... Non-linear band light, 3... Globe, 4... Thermal conductive medium, 6... Unevenness. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 4 Figure 5 Figure 6 Figure 43 Figure 7

Claims (1)

[Claims] The non-linear fluorescent lamp is sealed with a globe, and the non-linear fluorescent lamp and the globe are thermally connected via a thermally conductive medium excluding gas between the non-linear fluorescent lamp and the globe. What is claimed is: 1. A fluorescent lamp device, characterized in that the surface of the globe, on which the thermally conductive medium is located, is provided with irregularities.