JPS58112238A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To interrupt the high pressurization of intra-tube mercury vapor pressure and maintain lighting efficiency in high effectiveness by providing the coldest section at the middle section of a discharge path. CONSTITUTION:Since U-shaped curved two glow tubes 8 and 9 are communicated to each other through a communicating tube 10 and this communicating tube 10 is installed between the sections that are shifted toward the side of filament coils 15 and 15, space sections 22 and 23 that are separated from a discharge path 21 are formed almost at the middle section of the discharge path 21 and these spaces can be used as the coldest section. As a result, since the coldest section can be located at the middle section of the discharge path between the filament coils 15 and 15, the high pressurization of intra-tube mercury vapor pressure is interrupted and lighting efficiency can be maintained in high effectiveness.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a fluorescent lamp housed in an external container having a cap at one end.Technical background of the invention and its problems Fluorescent lamps are generally 1 with lower power consumption than incandescent light bulbs! Because it is easy to use and has a long life, the applicant has recently developed a fluorescent lamp device that can be used by attaching a screw-in cap to a fluorescent lamp and inserting it into an existing incandescent lamp socket. It has been put into practical use and is becoming widespread as a power-saving light source. This device has an outer aS composed of a cover equipped with a cap such as a 36-inch cap at one end and a globe capped at the other end of the cover, and a curved tube-shaped cap inside the envelope. It has a structure that accommodates a one-party lamp and a lighting circuit. It is necessary to make the discharge path length, that is, the total length of the pulp, as long as possible.Therefore, in this type of fluorescent lamp device, the center between both ends of the tube-shaped pulp should be formed into a substantially U-shape, and the center While forming a self-acidic part, 1 the center between the center-acidic part and both ends is formed into a substantially U-shape in a direction substantially orthogonal to the horizontal position including the above-mentioned U-shape, and a pair of both ends-acidic parts are formed. A generally saddle-shaped ceramic tube-shaped fluorescent lamp is used in which both end portions and the central defining portion of the two arms are adjacent to each other and positioned in the same direction.

By the way, when such a ceramic tube-shaped fluorescent lamp is placed in the innermost part of the lamp, the ambient temperature of the lamp rises, and due to this lI & symmetry, 1 atm of mercury inside the lamp rises. There is a possibility that the value becomes higher than the optimum value and the intensity of ultraviolet rays and visible rays decreases. As a countermeasure, ventilation holes are created on the circumferential surface of the gloves and covers to increase the ventilation inside the envelope, promoting the heat dissipation effect inside the envelope, and also using fluorescent lamps (by bringing outside air into contact with them). A conceivable method is to form the coldest part in a part of this fluorescent lamp. If the coldest part exists in a part of the fluorescent lamp, all excess mercury will condense in this coldest part, which will prevent the vapor pressure inside the tube from increasing and maintain a good light output. It has the advantage of

It is said that it is most preferable for this coldest part to exist in the central part of the discharge path of the fluorescent lamp or at the end Ilk outside the discharge path, and therefore, the coldest part is the deep part led out from both ends of the pulp. It is considered to be used. However, in order to make the depth part the coldest part, it is necessary to increase the length of the depth part to a certain extent so that the tip part extends outward from the pulp edge.
Considering that it is I11, there are disadvantages such as the lamp member being easily damaged during construction.

Purpose of the Invention The present invention was made based on the above circumstances.
The present invention aims to provide a fluorescent lamp that not only maintains good light output by reliably forming the coldest part in the center of the discharge path but also is free from damage.

Summary of the Invention In other words, the present invention achieves the above objects by separating two arc tubes curved into the same shape, each having an electrode at one end and being closed at the other end! 11R, and by connecting the other end of these arc tubes to the mounting plate with a communicating tube, the fluorescent lamp is installed. A discharge path is formed between the electrodes by connecting the two ends of the arc tube, and at the other end of the arc tube, a hollow space separate from the discharge path is formed, and the coldest part is formed in this hollow space. It is characterized by being made to do.

EXAMPLE OF THE INVENTION The present invention will be explained below based on an example shown in Figure 4.

FIG. 1 shows the overall shape of the fluorescent lamp device, and 1 is its cover. The cover 1 is narrowed at one end, and
It extends toward the other end (therefore, it is enlarged to form a substantially bowl-like shape, and a ferrule 1 of the type 2-1 is attached to this end, for example).

The opening at the other end of the cover 1 is covered with a light bulb-shaped light-transmitting globe 1, and the globe 1 and the cover 1 constitute an envelope 4. The envelope 4 of this embodiment has an appearance similar to that of a white pole type incandescent current. Incidentally, on the same surface of the cover 1 and the glove 1, a plurality of ventilation holes t... and σ... are provided, respectively, to communicate the inside and outside of the envelope 4.

Inside such an outside 5lltt-, a fluorescent lamp 1 according to the book *a does not light up and is not displayed. This fluorescent lamp 1 consists of two 11-piece 1g lamps formed in a substantially V-shape as shown in block 111.

1 are airtightly connected to each other by a communicating tube 10, and the molding procedure will be explained first. That is, two glass bulbs 11.12 with phosphor coatings (not shown) coated on their inner surfaces are prepared in advance, and a filament coil 15 is attached to one end 13.14 of each glass bulb J1°11. Along with purchasing the equipped mount XL,
The other end opening is closed and the arc tube 1. Form #.

And these arc tubes8. #Other end 7 F'*J
The one-sided structure has a communication hole 19. at a position shifted toward the mount 16.16 from the other end @1F, 1#.
10 will be established. Next, the arc tubes 8 and 8 are arranged parallel to each other and spaced apart from each other, and the communication holes 19 and 20 are made to directly face each other. A glass encounter tube 1 is placed on the opening edge of the communication hole 1e and go.
The openings at both ends of 0 are brought together, and this abutting part is heated
1ll and place KII together. Note that an encounter tube 10 is provided between the other end of the light tube 1.9*x r I J 1,
Arc tube 8. #A discharge path 21 is formed that connects the filament coils 16 and 18 with each other. In addition, the communicating tube 10 is joined at the other end 17/1B at a position biased toward the mount 16.16 than the terminal end, so that in the other end @ J r , J I,
Mounting the communication pipe 10 as a block 1g; 1. Hollow portions zz and zs located on the opposite side from - are formed, and therefore these holes @12 and 1M are connected to the intermediate portion of the discharge path 11 at a position away from the discharge path 11. next,
The planned bending portions 14.15 at the axial centers of the arc tubes/1 and 9 arranged side by side are heated and softened using a burner, etc., and the planned bending portions 14.11 are bent into a substantially U-shape in the same direction. to form a curved part 16.2"l. With this self-restraint, the arc tube 8.#
is U-shaped, one end s11゜14 and the other end 117F
t J # are formed in such a shape that they are adjacent to each other and positioned in the same direction. Incidentally, the arc tube whose molding has been completed, 8. After the inside of the arc tubes 1 and 1 is evacuated, a predetermined amount of inert gas and mercury are sealed inside, and then the mounts 16 and 16 are filled with inert gas and mercury.
The exhaust pipes za and za are tapped and the fluorescent lamp 7
completed as. The fluorescent lamp 2 lamp 1 manufactured by the above-mentioned procedure has one end IIJJ.

14 and the other end IT, 18 are fixed in the other end opening of this cover 1 in a posture facing toward one cover, and one end WA13#14 and the other end @Jl, xll are connected to the ventilation hole 1g... is close to.

According to such a fluorescent lamp 1, the arc tubes 8 and 1 are communicated with each other through the communication tube 10, and the communication tube 10 is connected to the arc tube 1. The filament coil 115.1S, that is, one end @I J
, 74 Since it was constructed between the evenly biased parts, the discharge path z
1, there is an empty space 12°2 located away from the discharge path z1.
3 is formed, and this empty space ax z t z g can be used as the coldest part. Therefore, since the coldest part is located at the filament coil 1M and Xi leap, the effect of providing the coldest part, that is, the function of preventing the mercury vapor pressure inside the tube from increasing, is fully exhibited. It is possible to maintain high lighting efficiency. At the same time, the exhaust pipes z, s, and z a are small in diameter and easily damaged.
There is no need to extend the lamps, and there is an advantage that the proportion of unnecessary parts generated during lamp manufacturing is significantly reduced.

Note that the present invention is not limited to the first embodiment described above, and FIG. 5 shows a second embodiment of the present invention. This second
In the embodiment, a pair of approximately U-shaped curved portions 111*, llb and j! are provided at two locations in the middle of the arc tube 1.1. a.J! b
A fluorescent lamp 11 is shown in which the following are continuously formed.

Further, a third embodiment of the present invention shown in FIG. 6 has an arc tube 11.
1141 m of approximately U-shaped curves at three locations along I.
, 4 l b , 41 a jli and 42 a.

A fluorescent lamp 41 in which 41b and 41e are successively formed is shown.

Further, the present invention is not limited to the second and third embodiments described above, and a fourth embodiment of the present invention is shown in FIGS. 7 and 811. Fluorescent lamp 51 of this fourth embodiment
The two arc tubes are arranged in an annular shape in the same direction, and have two annular parts 52 and 51b coaxially.

Further, FIG. 9 and FIG. 10 show a fifth embodiment of the present invention. In this fifth embodiment, arc tubes 8.9 and 9 are arranged side by side with one end 11.14 and the other ends J y and J a4 facing in opposite directions, and between these arc tubes 8.9 there is a total length and Intermediate glass tubes 61 having a diameter substantially equal to that of the arc tube 1°9 and having both ends hermetically closed are arranged parallel to each other and spaced apart from each other, and both ends of the intermediate glass tube #1 are
and arc tube8. The other ends @1 F and III are hermetically joined by auxiliary tubes 64 and 68, and a communication tube 66 is constituted by the intermediate glass tube d1 and the auxiliary tubes 4 and 85. The arc tube 8.9 and the intermediate glass tube #1 are bent into an annular shape in the same direction, and the fluorescent lamp 10 has a shape coaxially provided with three annular portions 67, 68 and C#. is formed. In the case of this embodiment, a single fluorescent lamp can be provided that can replace a plurality of annular fluorescent lamps. In this fifth embodiment, a fluorescent film is formed on the inner surface of the intermediate glass tube #r.

Effects of the Invention The present invention, which has been described in detail above, is a fluorescent lamp housed in an envelope equipped with a base, and this fluorescent lamp has an electrode at one end, and the other end is hermetically closed. Two arc tubes curved in the same shape are placed in parallel and spaced apart, and the other ends of these arc tubes are hermetically joined by a communicating tube, and this communicating tube is connected to the lower end of the arc tube. The arc tubes are connected to each other at a position biased toward the electrode side to form an electrode-tube-shaped discharge path, and at the same time, a hollow space is formed at the lower end of the arc tube, away from the discharge path. It is a bright lamp. According to this, the empty space inside the arc tube can be used as the coldest part, and since this empty space is located in the middle of the discharge path, the effect of providing the coldest part, that is, the mercury inside the tube The function of preventing vapor pressure from becoming high is fully demonstrated, and lighting efficiency can be maintained at a high level. Furthermore, since the coldest part exists between the electrodes in this way, there is no need to extend the chip part, which is easily damaged by am, and the generation rate of unnecessary parts during lamp manufacturing is significantly reduced. Further, the fluorescent lamp of the present invention has the excellent effect of being able to be housed in a small space even though the discharge path can be made sufficiently long.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention.
The figure is a side view of the fluorescent lamp device, Figures 2 and 3 are perspective views showing the manufacturing process of the fluorescent lamp, Figure 4 is a sectional view of the fluorescent lamp, and Figure 5 is a second embodiment of the present invention. A perspective view showing an example; FIG. 6 is a perspective view showing a third embodiment of the present invention; FIG.
8 and 8 show a fourth embodiment of the present invention, FIG. 7 is a side view, FIG. 8 is a view taken along the line ■-■ in FIG. 7, and FIG.
1G and 1G show a fifth embodiment of the present invention, FIG. 9 is a side view, and FIG. 1θ is a view taken along the line x--X in FIG. 9. 2... Cap, 4... Envelope, 7.1B, 411°5
1, '; ro... Fluorescent lamp, 8.9... Arc tube, 10.6-... Communication tube, J5-... Electrode (filament coil), 21... Discharge path, 22... ...Empty section. Applicant's agent Patent attorney Takehiko Suzue -181- Figure 9 gio diagram -

Claims (3)

[Claims] (1) A fluorescent lamp housed in an envelope with a cap at one end, which consists of two identically shaped lamps with an electrode at one end and a closed end at the other end. Separate the luminous tubes! In addition to IW&, the ends of these arc tubes are hermetically joined by a communicating tube, and this communicating tube connects the arc tubes to each other at a portion of the other end of the arc tube that is biased toward the electrode side than the terminal island. At the same time, a discharge path is formed between the electrodes by communicating with each other, and at the other end of the arc tube, a 9 part separated from the discharge path is formed, and this empty part is the coldest part.
1 fluorescent lamp. (2) Claim 411 refers to self-admonition in a substantially U-shape at one or more places of the 11 party pipes that were examined using a communication pipe lamp. (3) The fluorescent lamp according to claim (1), wherein the arc tube has an annular shape.