JPS6016029Y2 - fluorescent lamp device - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a fluorescent lamp device that can be used in place of an incandescent light bulb and that can save power.

[Technical background of the invention and its problems]

Fluorescent lamps are more efficient than ordinary incandescent lamps and can be used with lower power consumption, so they have recently been widely used in combination with fluorescent lamps and ordinary incandescent lamps.

Fluorescent lamp devices have been developed that are equipped with screw-in caps such as the E26 type, and also incorporate ballasts, starting circuits, etc., so that they can be screwed into existing incandescent light bulb sockets.

In the fluorescent lamp used in this device, the center of a straight tube bulb is bent into a substantially U-shape to form a central bent part, and the above-mentioned U-shape is formed between this central bent part and both ends. 1 pair of both end curved portions are formed by bending them into a substantially U-shape in a direction substantially orthogonal to the containing plane, and the both end portions and the central curved portion are located adjacent to each other in the same direction. It is curved into a saddle shape,
Efforts have been made to reduce the external dimensions.

Therefore, this curved tube fluorescent lamp is dimensionally compatible with incandescent light bulbs, and it is also possible to effectively place a long bulb in a limited space, increasing the total luminous flux. There are advantages such as being able to

By the way, this interspecies tube type fluorescent lamp is usually lit inside a globe for reasons such as light diffusion and improving the appearance, and therefore the inside of the globe becomes high temperature due to the heat generated by lighting the lamp. It is easy to become.

When a fluorescent lamp is used at a high ambient temperature inside the globe, the mercury vapor pressure becomes higher than the optimum value, and the intensity of ultraviolet rays as well as the intensity of visible radiation emitted from the phosphor decreases significantly. Problems such as poor lighting efficiency occur.

[Purpose of invention]

This idea was created based on these circumstances.
Provided is a fluorescent lamp device in which it is possible to form the coldest part in the central curved part, to reliably prevent mercury vapor pressure from increasing in the bulb, and to maintain high lighting efficiency. This is what I am trying to do.

[Summary of the idea]

That is, in order to achieve the above object, the present invention extends the central curved portion of a curved tube-shaped fluorescent lamp, which is approximately in the shape of a saddle, toward the base side beyond a plane passing through the end faces of both ends to which the electrodes are sealed. It is characterized by

[Example of idea]

The present invention will be explained below based on an embodiment shown in the drawings.

In the figure, reference numeral 1 denotes a base, which is formed into a substantially bowl shape with a circumferential surface shaped like a paraboloid of revolution.

A screw-in type cap 2, such as an E26 type cap, is attached to the center of one side of the base 1.

A flange portion 3 is provided at the other end opening of the base 1, and a substantially spherical globe 4 is crowned on the flange portion 3.

The glove 4 is made of a translucent synthetic resin material such as polycarbonate, and a plurality of protrusions 6 are provided on the circumferential side of the opening 5 at intervals in the circumferential direction.

These convex portions 6... are recessed portions 7 provided in the flange portion 3.
A glove 4 and a base 1, which are removably fitted to..., are combined.

The globe 4 and the base 1 are coupled together to form an envelope 8 whose appearance resembles a White Ball (trade name) type incandescent light bulb.

A partition plate 9 is attached to the opening 5 at the other end of the base 1 with screws 10...
This partition plate 9 is fixed through the opening 5.
The inside of the envelope 8 is divided into a base 1 side and a glove 4 side.

As a preferable example, the surface of the partition plate 9 on the globe 4 side forms a light-reflecting surface, and a curved tube-shaped fluorescent lamp 11 is fixed on this light-reflecting surface.

This curved tube-shaped fluorescent lamp 11 has a straight tube-shaped glass bulb bent into a substantially U-shape at the center between both end portions 12 and 12 to form a central curved portion 13, and this central curved portion. 13 and both ends 12.・A pair of both end bent portions 14, 14 are formed by bending the space between the two end portions 12.
2 and the central curved portion 13 are located adjacent to each other in the same direction, and both end portions 12.12 and both end curved portions 14, 14
In addition, four straight pipe portions 15a to 15d connecting the both end curved portions 14.14 and the central curved portion 13 are bent into a generally saddle shape that are juxtaposed in a positional relationship forming four vertices of a quadrangle.

Both ends 12 of such a curved fluorescent lamp 11
．． 12 respectively have electrodes 16. Mount 17 with I6
．． 17 is sealed, and this curved tube-shaped fluorescent lamp 11
is fixed in the glove 4 with both end portions 12.12 and the central curved portion 13 facing toward the partition plate 9, that is, the base 1 side.

A ballast 18 is attached to the center of the light output surface of the partition plate 9, and the ballast 18 is surrounded by the straight pipe portions 15a to 15d of the curved fluorescent lamp 11.

Further, the circumferential surface of the base 1 is provided with a plurality of ventilation holes 19 for communicating the inside and outside of the base 1, and the partition plate 9 is provided with holes located around the ballast 18 and connected to the inside of the base 1. A communication hole 20 for communicating with the inside of the glove 4 is provided.

On the other hand, the central curved portion 13 of the curved fluorescent lamp 11 extends toward the base 1 from a plane passing through the end faces of both end portions 12.12 to which the mounts 17.17 are sealed.

That is, this central curved portion 13 has both end curved portions 14, 14.
When forming the center curved portion 13 and both end portions 12.12, by bending a portion that is slightly biased toward both end portions 12.12 than the intermediate portion, both end portions 12.12 are formed. The straight pipe parts 15a to 15d are led out in the pipe axis direction from the plane passing through the end face, and therefore, there are essentially four straight pipe parts 15.
Among a to 15d, the central curved portion 13 and both end curved portions 14,1
The total length of the straight pipe portions 15b and 15c connecting the straight pipe portions 4 and 4 is longer than the total length of the other straight pipe portions 15a and 15d.

It goes without saying that the electrodes 16.16 are connected to the cap 2 via a ballast 18 and a circuit for starting and lighting a lighting tube (not shown) or the like.

According to this configuration, the circuit for starting and lighting consisting of the curved fluorescent lamp 11, the ballast 18, etc. is integrated into the envelope 8 equipped with the base 2, so that the existing circuit can be used. It can be turned on by simply screwing it into an incandescent bulb socket.

In this device, the central curved portion 13 of the curved tube-shaped fluorescent lamp 11 is extended toward the base 1 side from the plane passing through the end faces of both end portions 12.12. When the light is turned on, the distance from the curved part 13 to both ends 12.12 where the lighted raw eel also generates heat becomes longer, so the central curved part 13 is less likely to be affected by the heat of the electrode 16.16, and other parts The tube wall temperature is kept relatively low compared to the other parts.

This also applies when the ballast 18 is placed in a position surrounded by the straight pipe parts 15a to 15d of the fluorescent lamp 11 as in the above embodiment, and when the ballast 18 is
This also applies to the case where the cap 2 is installed closer to the cap 2 than the plane passing through the end faces of the both end portions 12 and 12 of the cap 1.

That is, when the ballast 18 is provided in a position surrounded by the straight pipe portions 15a to 15d of the fluorescent lamp 11 as in the above embodiment, the thermal influence of the electrodes 16. The central curved portion 13 is less susceptible to thermal effects when the electrodes 16, 16 are further away from each other.

In addition, the ballast 18 is connected to both ends 12.12 of the fluorescent lamp 11.
If the central curved portion 13 is located farther away from the electrodes 16, 16 in terms of distance, it will be less susceptible to thermal effects.

Therefore, the mercury vapor pressure becomes low in the central bent part 13, and all the excess mercury in the pipe is removed from the central bent part 13.
3 and the vicinity thereof, and this part acts as the so-called coldest part, so that the temperature of the central bent part 13 is affected and the mercury vapor pressure in the tube is prevented from increasing.

Therefore, even though the curved fluorescent lamp 11 is housed in a closed space within the globe 4, the mercury vapor pressure is prevented from increasing, and the light output can be maintained at a good level.

In particular, when the lamp is lit with the base 2 facing down, heat is collected at the top of the globe 4 due to convection.

Therefore, when the lamp is lit with the cap 2 facing down, the central curved portion 13 is located below both end portions 12 and 12 which are heat generating portions.
is less susceptible to thermal effects, making it more convenient to form the coldest part.

The present inventor housed the curved tube-shaped fluorescent lamp 11 as described above in an envelope 8 having an outer diameter of 110φ together with a ballast 18, etc., and lit the lamp with the base facing down, keeping the tube length constant. When the relationship between the extension length of the central curved portion 13 and the light output was investigated, the results shown in FIG. 4 were obtained.

The light output shown in FIG.
It is expressed as a relative value when the light power when a curved tube-shaped fluorescent lamp placed on the same plane as the end face of 2.12 is housed is taken as 100 (%).

As is clear from FIG. 4, the longer the extension length of the central curved portion 13 is, the more the light output is improved. It is presumed that this is because the electrodes 16, 16 are less affected by heat, and the tube wall temperature is kept at a low temperature.

Further, in this embodiment, since the lamp is lit with the cap 2 facing downward, the central curved portion 13 comes into contact with the outside air flowing in from the ventilation holes 19 provided in the base 1 and is cooled.

Therefore, the temperature of the tube wall of the central curved portion 13 is kept lower, which is advantageous in preventing the mercury vapor pressure from increasing.

When the lamp 11 is turned on with the cap 2 facing toward the opposite direction, the coldest part of the fluorescent lamp 11 is the central curved part 13 or both end curved parts 14.
, 14.

That is, if the curved ends 14, 14 are sufficiently far away from the electrode 16.16, the curved ends 14, 14 will
．． 16 and forms the coldest part.

On the other hand, when the curved portions 14, 14 at both ends are thermally influenced by the electrodes 16.16, the farther the central curved portion 13 is from the electrodes 16, 16, the less it is influenced by the heat, forming the coldest portion. Maintain appropriate mercury vapor pressure.

Particularly in the above embodiment, when the lamp is lit with the cap 2 facing upward, the hot air inside the groove tube 4 and the base 1 rises toward the cap, but this hot air flows through the ventilation holes 19 and the communication holes 20.
It flows out through...

Therefore, the rise in temperature within the globe 4 can be suppressed, and the mercury vapor pressure can be made more appropriate.

In the above embodiment, the glove hanging side and the base head side are separated by a partition plate, but in implementing the present invention, the above partition plate is omitted and the glove and the inside of the base are directly communicated. You can also do it.

Therefore, curved tube fluorescent lamps are not limited to those that are fixed on the partition plate; for example, the stays can be extended from the base side,
It may be supported by this stay.

[Effect of idea]

The present invention described in detail above includes a curved tube-shaped fluorescent lamp which is bent into a roughly saddle shape in an inner space surrounded by a base equipped with a cap and a globe mounted on the base, and this fluorescent lamp. In the fluorescent lamp device, the curved fluorescent lamp is housed with its electrode-sealed ends and central curved portion facing toward the base. In addition, the central curved portion is extended toward the base side from a plane passing through the end faces of both ends.

According to this, the distance from the central curved part to both ends where the lighting inner shell also generates heat becomes longer, so at least when the lamp is lit with the base facing downward, the thermal influence of the electrodes on the central curved part is reduced, and this The temperature of the tube wall in the central curved portion is kept even lower.

Therefore, all excess mercury in the tube condenses at or near this central bend, and this area acts as the coldest part, so the mercury vapor pressure inside the bulb is not affected by the temperature of the central bend. This prevents the pressure from increasing.

Therefore, even though the curved fluorescent lamp is placed together with the circuit in a closed space surrounded by the base and the globe, it is possible to reliably prevent the mercury vapor pressure from increasing and maintain high lighting efficiency. It has excellent effects such as:

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with the first being a perspective view and the second being a perspective view.
Figure 3 and Figure 3 are cross-sectional views seen from different directions, Figure 4.
The figure is a characteristic diagram showing the relationship between the extension length of the central curved portion and the optical output. 1...Base, 2...Base, 4...
... Globe, 11 ... Curved fluorescent lamp, 12 ... Both ends, 13 ... Central curved part, 14 ... Both ends curved Part, 16...electrode, 18...circuit (ballast).

Claims (1)

[Scope of utility model registration request] A globe is placed on a base with a cap at one end, and a straight pipe valve is curved into a substantially U-shape at the center between both ends of the bulb in an internal space surrounded by the base and the globe. At the same time, the central curved part and both ends are curved into a substantially U-shape in a direction substantially orthogonal to a plane including the U-shape to form a pair of both-end curved parts. The above-mentioned curved tube type fluorescent lamp includes a curved tube type fluorescent lamp in which both end portions and the central curved portion are located adjacent to each other in the same direction, and a circuit for starting and lighting the curved tube type fluorescent lamp. The tube-shaped fluorescent lamp is housed with both ends to which the electrodes are sealed and the central curved section facing toward the base, and the central curved section is placed closer to the base than the plane passing through the end faces of both ends. A fluorescent lamp device characterized in that it has an extended length.