JPS6314322Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention is a curved tube-shaped fluorescent lamp placed in a bulb-shaped envelope equipped with a cap, and a device for starting and lighting the fluorescent lamp. The present invention relates to a fluorescent lamp device that accommodates a lighting circuit for lighting the lamp and can be used by directly inserting it into an existing incandescent lamp socket.

(Prior art) Conventionally, this type of fluorescent lamp device has a lighting circuit such as a fluorescent lamp and a chiyoke ballast placed in the same space within the envelope, so the envelope is kept in a sealed state. When the fluorescent lamp is turned on, the temperature inside the envelope rises due to the heat from the fluorescent lamp and ballast, and this thermal effect causes the mercury vapor pressure of the fluorescent lamp to exceed the optimum value, reducing luminous efficiency. A problem arises. By the way, the cause of the temperature rise inside the envelope is due to the heat generated by the ballast and the fluorescent lamp as mentioned above, so the inside of the envelope is divided into the cover side and the glove side through a heat insulating plate. However, it is conceivable to house the lighting circuit components in the chamber on the cover side, and to house the fluorescent lamp in the chamber on the glove side.

(Problem that the invention aims to solve) However, even if the inside of the envelope is divided in this way, the temperature of the chamber on the glove side rises due to the heat generated from the fluorescent lamp housed here, and the electrodes are especially sealed. A large amount of heat is generated near both ends of the lamp, and this heat raises the temperature inside the globe and heats the lamp bulb, causing a problem in that mercury vapor pressure increases. Therefore, in order to suppress the temperature rise inside the glove as much as possible, an important issue for this type of device is how to efficiently exhaust the heat from the fluorescent lamp to the outside.
There was still room for improvement in terms of thermal performance.

The present invention was developed based on these circumstances, and is a fluorescent lamp that can efficiently radiate heat from the fluorescent lamp to the outside, suppress the temperature rise inside the glove as much as possible, and improve luminous efficiency. The purpose is to provide equipment.

[Structure of the invention] (Means for solving the problem) The invention divides the inside of the envelope into two chambers, a cover side and a glove side, by a heat insulating plate, and a lighting circuit is installed in the cover side chamber. In addition, curved tube-shaped fluorescent lamps are housed in the chambers on the glove side, and a heat sink is provided in the chamber on the glove side of the heat insulating plate, and a cylindrical portion is integrally provided on the heat sink. , characterized in that both ends of the fluorescent lamp are inserted and fixed in close contact with the cylindrical part, and a heat radiation wall part exposed around the envelope is provided around the outer periphery of the heat radiation plate. do.

(Function) According to the present invention, when the lamp generates heat while it is lit, the heat near the electrode portion, which generates a particularly large amount of heat, is transmitted to the heat radiating plate through the cylindrical portion, and is exhausted to the outside air through the heat radiating wall portion. Therefore, heat is released before the temperature inside the globe rises, and the temperature of the lamp is prevented from rising, thereby preventing an excessive rise in mercury vapor pressure and improving luminous efficiency.

(Example) The present invention will be described below based on an example shown in the drawings.

In the figure, reference numeral 1 denotes a cover made of a metal material such as aluminum, and is formed into a substantially bowl shape with a circumferential surface shaped like a paraboloid of revolution. A screw-in base 3 is attached to the top of one end of the cover 1 via an electrical insulator 2 such as heat-resistant rubber, and a substantially spherical globe 4 is mounted on the opening side of the other end. The globe 4 is made of a transparent synthetic resin material, glass, or the like, and the crown of the globe 4 constitutes an envelope 5 whose appearance resembles a ball-shaped light bulb. The inside of the envelope 5 is divided into a storage chamber 7 on the cover 1 side and a light emitting chamber 8 on the glove 4 side by a heat dissipation partition plate 6 having a substantially disc shape. The heat dissipation partition plate 6 is made of a lightweight metal material with excellent thermal conductivity, such as aluminum alloy, and is fastened and fixed onto a flange portion 9 protruding from the inner peripheral edge of the opening of the cover 1 via screws 10. ing. Therefore, in this embodiment, most of the peripheral wall of the storage chamber 7 is made of metal material. Further, on the outer peripheral edge of the heat dissipation partition plate 6, a heat dissipation wall portion 11 that stands up in the shape of a flange is integrally molded continuously in the circumferential direction. The heat dissipation wall portion 11 is curved along the curvature of the circumferential surface of the envelope 5 and is exposed on the circumferential surface, and constitutes a part of the envelope 5. A locking claw 12 provided at the periphery of the opening of the glove 4 is fixed to the inner circumferential portion of the heat dissipating wall portion 11, so that the heat dissipating wall portion 11 is sandwiched between the cover 1 and the glove 4. It is. In this embodiment, the rising height h of the heat radiation wall portion 11 is set to about 5 mm.

On the other hand, in the light emitting chamber 8 of the envelope 5, a curved tube-shaped fluorescent lamp 13 is accommodated. This fluorescent lamp 13 has a bulb 15 having electrodes 14, 14 sealed at both ends, which is bent into a substantially U-shape at the center between both ends 16, 16, and this curved part 17 and both ends. 16, 16 is curved into a substantially U-shape in a direction substantially perpendicular to the plane containing the U-shape, and its overall shape resembles a saddle for horseback riding, so it is called a saddle-shaped saddle. It is called a light lamp. This fluorescent lamp 13 is housed and held in the light emitting chamber 8 with both end portions 16, 16 and the curved portion 17 facing the heat dissipation partition plate 6 side. That is, in the case of the present embodiment, the hollow cylindrical part 18 has both end parts 16, 16 erected integrally on the partition plate 6,
18 to bring the both ends 16, 16 into close contact with the inner surfaces of the cylindrical parts 18, 18, and by locking the curved part 17 to the support stay 19 on the heat dissipation partition plate 6, the above posture is achieved. It is fixed.

Further, in the housing chamber 7 in the envelope 5, a high frequency lighting circuit 20 is provided as a circuit for lighting the fluorescent lamp 13.
is accommodated. Since this high frequency lighting circuit 20 is already well known, a detailed explanation thereof will be omitted, but as shown in FIG.
A high frequency conversion circuit 2 converts the output voltage of the rectifier circuit 22 into a high frequency voltage and outputs it, and also supplies this high frequency voltage to the fluorescent lamp 13.
3, and a single yoke coil ballast 24 interposed between the conversion circuit 23 and the fluorescent lamp 13. Such a high frequency lighting circuit 20 is constructed by arranging various circuit elements (not shown) in parallel on a circuit board 25 which also serves as a heat insulating board of the present invention, and this heat insulating circuit board 25 is connected to the cover 1 are jointly fastened to the flange portion 9 of the screws 10 through screws 10. Therefore, the thermally insulated circuit board 2
5 also divides the inside of the envelope 5 into a storage chamber 7 on the side of the cover 1 and a light emitting chamber 8 on the side of the glove 4, so as to isolate heat from each other.

According to such a configuration, during lighting, both ends 16, 16 of the fluorescent lamp 13 generate significant heat due to the presence of the electrodes 14, 14;
is a cylindrical part 1 protruding from a metal heat dissipation partition plate 6
8, 18 and is in close contact with the inner surface thereof, the heat at both ends 16, 16 is transferred to the cylindrical portion 18, 1.
The heat is efficiently transmitted to the heat dissipation partition plate 6 side through 8. A heat dissipation wall portion 11 is provided on the outer circumference of the heat dissipation partition plate 6 and is exposed to the outside air by being exposed to the circumferential surface of the envelope 5. Heat is radiated to the outside of the envelope 5 by heat conduction between the wall portion 11 and the outside air. Therefore, the heat emitted from the fluorescent lamp 13 is less likely to be trapped inside the envelope 5, so the temperature rise inside the envelope 5 can be suppressed, and the mercury vapor pressure inside the fluorescent lamp 13 is kept in the optimum range. can be controlled to maintain high luminous efficiency. In particular, in this embodiment, since the cover 1 is also made of metal such as aluminum, the heat transferred from the fluorescent lamp 13 to the heat dissipation partition plate 6 is transmitted to the entire cover 1 through the contact portion between the heat dissipation partition plate 6 and the cover 1. This increases the heat dissipation area and contributes to improving the heat dissipation effect.

Furthermore, in this embodiment, since the high-frequency lighting circuit 20 is used as the lighting circuit for the fluorescent lamp 13, a high-frequency electromagnetic field is generated from the single-yoke coil ballast 24, etc.; Since the parts are made of metal, the entire high frequency lighting circuit 20 is covered with a conductive layer. Therefore, the high-frequency electric field is absorbed by this conductive layer, so leakage to the outside is reduced, and communication failures and the like can be prevented.

In the above embodiment, the fluorescent lamp is shaped like a saddle, but it may be simply curved into a U-shape, and the lighting circuit is not limited to a high-frequency lighting circuit, and a chiyoke coil type ballast may be used. It may be a general lighting circuit.

[Effects of the invention] According to the invention described in detail above, both ends of the fluorescent lamp are inserted and fixed in close contact with the cylindrical part integrally protruding from a metal heat sink, and the outer periphery of the heat sink is Since a heat dissipation wall section is provided on the outer surface of the envelope, the heat at both ends of the fluorescent lamp, which generates the most heat, is efficiently transferred to the heat dissipation plate. The transmitted heat is radiated to the outside of the envelope through thermal conduction with the outside air through the heat radiating wall. Therefore, the heat of the fluorescent lamp is less likely to be trapped inside the envelope, which makes it possible to suppress the temperature rise of the fluorescent lamp, prevent excessive rise in mercury vapor pressure, and maintain high luminous efficiency. There are advantages.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. 3 is a configuration diagram showing an outline of a high-frequency lighting circuit. 1...Cover, 3...Base, 4...Glove,
5... Envelope, 6... Heat dissipation partition plate, 7, 8... Chamber (accommodation chamber, light emitting chamber), 11... Heat dissipation wall portion, 13...
Curved tube fluorescent lamp, 14... electrode, 16... both ends, 20... lighting circuit (high frequency lighting circuit), 2
5...Heat insulated circuit board.

Claims (1)

[Scope of utility model registration request] The envelope consists of a cover with a cap at one end and a translucent globe that covers the opening at the other end of the cover, and has electrodes at both ends, and these ends are connected to each other. In a fluorescent lamp device that houses curved fluorescent lamps located adjacent to each other in the same direction and a lighting circuit for lighting the fluorescent lamps, the inside of the envelope is covered with a heat insulating plate. Divided into two rooms: side and glove side.
A lighting circuit is housed in the chamber on the cover side, a fluorescent lamp is housed in the chamber on the glove side, and a metal heat sink is provided in the chamber on the glove side from the heat insulating plate. Both ends of the fluorescent lamp are closely inserted and fixed into the cylindrical part, and the outer periphery of the heat dissipation plate has a heat dissipation plate exposed on the circumferential surface of the envelope. A fluorescent lamp device characterized by having a wall section.