JPS6196647A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To minimize the increase in the internal temperature of the ballast case, installed adjacent to the chassis and apart from the base, by installing a ballast in the ballast case and packing a thermoconductive-resin-system filler between the inner surface of the ballast case and the ballast. CONSTITUTION:A ballast case 19 made of a synthetic resin is installed adjacent to a chassis 14 and apart from a base 16. A ballast 20 is installed in the ballast case 19. A thermoconductive-resin-system filler 30 is packed between the ballast case 19 and the ballast 20. The heat generated in the ballast 20 during lighting is efficiently transmitted to the ballast case 19 through the filler 30. Part of the heat reaching the ballast case 19 is discharged outside after being transmitted through the chassis 14, a cylindrical section 14a, a cover 11 and the base 16. And, part of the heat is discharged outside after being transmitted through the chassis 14, a globe space 32 and a globe 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fluorescent lamp device for illumination with a screw-in base.

[Conventional technology]

This type of fluorescent lamp device has a screw-in base, so it can be used by being attached to an existing incandescent lamp socket.

As illustrated in FIG. 5, a conventional fluorescent rung device of this type has a chassis 2 to which a screw-type base 1 is attached.
, a ballast 3 held on the side opposite to the base of the chassis 2, a so-called saddle-shaped curved tube-shaped fluorescent lamp 4, and a translucent globe 5 that covers the outside of the fluorescent lamp 4. It is configured to include a cover 6 that covers the chassis 2 and the like.

The cover 6 and the glove 5 constitute a spherical envelope.

Furthermore, electrical circuit components including a lighting tube are housed within the envelope. By screwing the cap 1 into a door or a fitting installed on the ceiling, it can be used in the same way as a conventional incandescent light bulb.

[Problem that the invention seeks to solve]

However, in the structure in which the K fluorescent rung 4 and the ballast 3 are housed in one envelope as described above, the ambient temperature of the fluorescent rung 4 tends to rise due to the heat generated from the ballast 3.

When the temperature of the light lamp 4 rises, the mercury vapor pressure within the lamp becomes higher than the optimum level, which may cause a decrease in the intensity of ultraviolet rays and visible light. Furthermore, if the distance between the fluorescent lamp and the ballast is increased in order to reduce the thermal influence, the envelope becomes larger and weighs more.

In addition, as a measure to suppress the rise in ambient temperature of the fluorescent lamp f4, a ballast case 8 is provided between the chassis 2 and the fluorescent lamp 4 as shown in FIG. It is also considered to partition the space on the side of the vessel 3.

However, in such a structure, a space 9 exists between the ballast 3 and the ballast case 8.

This space 9 does not have a heat insulating effect, but this space 9
Since it is difficult for air to flow through the ballast case 8, heat may build up inside the ballast case 8, which may even cause a rise in temperature.

Also, by applying a face to the outer surface of the ballast 3,
In addition to electrical insulation, rust prevention, and prevention of rattling noise, they are also used to improve heat dissipation. However, performing face treatment causes some problems in the process. Therefore, it is desirable to be able to improve heat dissipation without performing face treatment.

[Means for solving problems]

In order to solve the above problems, the fluorescent lamp device of the present invention includes a chassis to which a screw-type cap is attached to the end, a ballast arranged on the opposite side of the chassis, and a curved tube shape. In a fluorescent lamp device comprising a fluorescent lamp and a glove covering the outside of the fluorescent lamp, a ballast case is provided on the anti-Japanese gold side of the chassis, and the ballast is accommodated in the ballast case. , characterized in that a heat conductive resin filler is filled between the inner surface of the ballast case and the ballast.

[Effect]

According to the above configuration, the heat generated in the ballast is transmitted to the ballast case via the resin filler, and further transmitted to the chassis and dissipated to the base side. Further, the resin-based filler is interposed between the ballast and the ballast case, so that the ballast is reliably fixed.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In FIG. 1, reference numeral 10 indicates an envelope made of synthetic resin.

The envelope 10 includes a cover 11 located on the upper side in the figure, and
A translucent globe 12 located on the lower side of the figure and a shell,
It has a spherical shape.

A synthetic resin chassis 14 is provided inside the cover 11. A cylindrical portion 74 & is provided at one end of the chassis 14 . A male threaded portion 15 for attaching a cap is formed on the outer periphery of this cylindrical portion 14m.

A cap 16 is screwed onto this male threaded portion 15.

The cap 16 is of the same type as the screw-in cap of a general-purpose incandescent light bulb, and is provided with an eyelet terminal 12 for power supply on the end surface.

Furthermore, a stabilizer case 19 made of synthetic resin is provided on the opposite side of the chassis 14. The stabilizer case 19 has a substantially box shape with an open top side in the drawing. Then, the open end 19a of the ballast case 19 is attached to the pair of legs 14b of the chassis 14 by high frequency bonding or other appropriate means.
.

14b. A space 14c is provided between the legs 14b, 14b through which air can circulate. A stabilizer 20 is housed within the stabilizer case 19.

In addition, a curved tube-shaped fluorescent lamp 21 is placed on the anti-Japanese gold side of the chassis 14.
is placed. This fluorescent lamp 2 is curved to form a so-called saddle shape. In FIG. 2, the fluorescent lamp 21 is shown expanded and shown in a plan view. The fluorescent lamp 21 has a substantially U-shaped portion 21h located in the center and inverted U-shaped portions 21b located on both sides thereof.

21b. Although it is shown in a plan view in FIG. 2, in reality, the plane containing this inverted U-shaped portion 21b is curved in a direction that intersects the plane containing the U-shaped portion 21m. It has a three-dimensional saddle shape.

The central curved portion 21c of the fluorescent lamp 21 is engaged with a hook-shaped support portion 24 projecting from the ballast case 19. Also, the base 21 d of the fluorescent lamp 2, 2
1 d is held by a lamp support 25 which is also integrally molded into the ballast case 19 . The outside of the fluorescent lamp 21 is covered by the globe 12. Further, a lighting tube 27 as a starting element is attached to the lamp support part 25,
A noise prevention capacitor 28 is attached. The above circuit components constitute an electric circuit similar to that of a general fluorescent lamp, as shown in FIG.

As shown in FIG. 3, a heat conductive resin filler 30 is filled between the ballast case 19 and the ballast 20. As this resin-based filler 30, for example, a polyester resin or an epoxy resin-based compound is used. When assembling this fluorescent lamp device, this resin-based filler 30 is placed in a predetermined amount in the ballast case 19 in an uncured state, and the ballast 20 is placed on top of the ballast case 19 and pushed in. , it flows and fills the gap between the ballast case 19 and the ballast 20, and hardens.

In the fluorescent lamp device configured as above,
Heat generated in the ballast 20 during lighting is efficiently transmitted to the ballast case 19 side via the resin filler 30. A part of the heat reaching the ballast case 19 is transferred from the chassis 14 to the cylindrical part 1.
4a → is transmitted to the cover 11 and the base 16, and is radiated to the outside. In addition, a part of the heat is transmitted from the chassis 14 to the glove inner space 32 to the glow f12 and radiated to the outside. Thus, according to this embodiment, the heat of the ballast 20 can be trapped inside the ballast case 19. By transmitting heat throughout the fluorescent lamp device, heat dissipation efficiency is improved. As a result, the ambient temperature of the fluorescent lamp 21 can be prevented from becoming too high, so the lamp lighting efficiency is improved and the brightness of the lamp is increased.

In order to further downsize this type of fluorescent lamp device, the ballast case 19 is also required to be downsized as much as possible. However, as the ballast case 19 becomes smaller, the gap between the ballast case 19 and the ballast 20 inevitably becomes narrower. In this case, if the resin-based filler 30 has poor fluidity, the filler 30 may not flow properly into the gap.

Therefore, when the gap is extremely narrow like this, it is effective to mix inorganic powder into the resin filler 30. Examples of inorganic powder include calcium carbonate powder,
Alternatively, powdered glass fiber is suitable.

The mixing ratio is 1 part resin to 0.0 parts inorganic powder by weight.
It should be about 1 to 2.5. Heat dissipation improves as the proportion of inorganic powder increases. However, if the ratio of the inorganic powder exceeds 2.5, the fluidity of the resin deteriorates, making it difficult to fill the gaps.

Preferable results can be obtained by using about 2 parts of the inorganic powder to 1 part of the resin. Furthermore, if granular inorganic material is used instead of inorganic powder, it is difficult for the charging material 30 to adhere to the surface of the ballast case 19 or the ballast 20, and sufficient heat conduction efficiency cannot be obtained. . For this reason, inorganic substances are not granular,
Preferably, it is in the form of a fine powder.

Another embodiment of the present invention is shown in FIG. In this embodiment, a pair of thermally conductive plates 35, 35 are arranged within the ballast case 19. This heat conduction plate 35.35
For example, a metal plate with good thermal conductivity, such as aluminum, is used by bending it. And heat conduction plate 35.35
35*, 35* are brought into contact with the stabilizer 20, and the ends 35b, 35b are made to extend toward the base 16 side. The end portions 35b, 35b side portions are brought into pressure contact with the inner surfaces of the legs 14b, 14b of the chassis.

Therefore, according to this embodiment, the heat of the ballast 20, particularly the lower surface of the coil, can be guided toward the base via the heat conductive plates 35, 35. In other words, heat conduction to the fluorescent lamp 2 side can be reduced.

〔Effect of the invention〕

Since the present invention is configured as described above, the heat of the ballast can be efficiently dissipated to the base side.
Temperature rise inside the ballast case can be reduced.

Therefore, it is possible to prevent the ambient temperature of the fluorescent lamp from rising excessively, and it is possible to prevent a decrease in light output due to an increase in mercury vapor pressure.

Furthermore, since heat dissipation is improved, it is possible to make the entire device smaller and lighter than before, and in some cases, face treatment can be omitted due to good heat dissipation. Moreover, since there is a resin filler between the ballast case and the ballast,
It is effective in ensuring the identification of the ballast and also in preventing the occurrence of noise during lighting.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the present invention;
The figure is a cross-sectional view of the fluorescent rung device, the second figure is a circuit diagram, and the third figure is a cross-sectional view of the fluorescent rung device.
The figure is an enlarged sectional view of the ballast part. FIG. 4 is an enlarged sectional view of a ballast portion showing another embodiment of the present invention, and FIG. 5 is a sectional view showing a conventional fluorescent lamp device. 12...Glove, 14...Chassis, 16...
Base, 19... Ballast case, 20... Ballast, 2
1... Fluorescent lamp, 30... Resin-based filler, 35
...Heat conduction plate.

Claims (2)

[Claims] (1) A chassis to which a screw-type cap is attached to the end, a ballast and a curved fluorescent lamp arranged on the side opposite to the cap of the chassis, and a glove that covers the outside of the fluorescent lamp. In the fluorescent lamp device, a ballast case is provided on the side opposite to the base of the chassis, the ballast is accommodated in the ballast case, and heat is generated between the inner surface of the ballast case and the ballast. A fluorescent lamp device characterized by being filled with a conductive resin filler. (2) A heat conductive plate is arranged inside the ballast case, a part of the heat conductive plate is brought into contact with the ballast, and an end of the heat conductive plate is extended toward the base, and this end The fluorescent lamp device according to claim 1, characterized in that a side portion thereof is brought into contact with a part of the chassis.