JP3262168B2 - Bulb-type fluorescent lamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact fluorescent lamp.

[0002]

2. Description of the Related Art Conventionally, in a fluorescent lamp, for example, as described in Japanese Patent Application Laid-Open No. 1-220360, a bulb having a bent discharge path formed by sequentially connecting three substantially U-shaped tubes. There is known a configuration of a fluorescent lamp that is miniaturized while securing a discharge path length by forming electrodes at both ends of the bulb.

In such a fluorescent lamp, the main amalgam controls the mercury vapor pressure in the bulb to an appropriate range during steady operation, the mercury adsorbs floating mercury in the bulb when extinguished, and adsorbs in the early stage of operation including start-up. Auxiliary amalgam which releases liposome may be used. The main amalgam is housed in an exhaust tube protruding from the sealed end of the tube at one end of the valve, and the auxiliary amalgam is located at the end of the tube located in the middle of the valve. .

However, when the main amalgam is accommodated in a thin exhaust tube protruding from the end of the bulb at one end of the bulb where the electrode is sealed, the temperature of the main amalgam rises due to the influence of heat from the electrodes. The mercury vapor pressure is not effectively suppressed, and there is a problem that the luminous flux is reduced due to the excessive mercury vapor pressure, and the mercury vapor pressure at the other end of the bulb away from the main amalgam is made uniform. And it is difficult to stabilize.

Further, as described in Japanese Utility Model Publication No. 4-47893, the main amalgam is accommodated in a narrow tube protruding from an end of a tube located at an intermediate portion among three tubes of a valve. Known fluorescent lamps are known. In this fluorescent lamp, the thermal effect of the electrode on the main amalgam is reduced, the excessive rise in the temperature of the main amalgam is suppressed, the vapor pressure of mercury is kept in an appropriate range, and the distance from the main amalgam to each end of the bulb is reduced. The distance is almost uniformly shortened so as to make the mercury vapor pressure in the entire valve uniform and stable.

However, if the main amalgam is housed in a thin tube protruding from the end of the tube located in the middle of the three tubes of the bulb, the main amalgam is hard to warm up because it is too far from the electrode, and particularly, However, when the ambient temperature of the fluorescent lamp is low and the temperature of the main amalgam itself is low, such as at startup, the temperature of the main amalgam does not quickly reach the temperature most suitable for its operation, and the rate at which mercury is released is reduced. As a result, there is a problem that the rising characteristic of the light beam is inferior and it takes time to reach a stable state.

[0007]

As described above, as described in Japanese Patent Application Laid-Open No. 1-220360, the main amalgam protrudes from the end of the bulb at one end where the electrode is sealed. When housed in a small exhaust tube, the temperature of the main amalgam becomes too high due to the heat from the electrodes, and the mercury vapor pressure at the tube side at the other end of the valve away from the main amalgam becomes uniform and stable. There are difficult problems,
Further, as described in Japanese Utility Model Publication No. 4-47893, when the main amalgam is housed in a narrow tube protruding from an end of a tube located at an intermediate portion of the three tubes of the valve, The amalgam is too far away from the electrodes and is hard to warm up,
There is a problem that it takes time for the light flux to reach a stable state.

In recent years, with the miniaturization of fluorescent lamps,
Although the miniaturization of the valve is desired, in a configuration in which a narrow tube for exhaust is provided at the end of the valve, it is necessary to reduce the diameter of the narrow tube as the valve is reduced in diameter. When the diameter is reduced, the exhaust conductance becomes worse and the exhaust efficiency is reduced. Even if the diameter of the thin tube is not reduced, there is also a problem that the sealing step becomes difficult because the distance between the pair of inner wells supporting the electrode is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made in response to a reduction in the diameter of a bulb, and has a mercury vapor pressure within an appropriate range, and can shorten the time until the luminous flux is stabilized at the time of starting. It is an object of the present invention to provide a shaped fluorescent lamp.

[0010]

According to a first aspect of the present invention , there is provided a bulb-type fluorescent lamp having a tube outer diameter of 8 to 11 mm and three or more U-shaped lamps.
And a bulb in which electrodes are sealed at the ends of the tube where both ends of the discharge path are located ; and a bulb of which ends are located at both ends of the bulb.
At the end where the electrodes are not sealed and at both ends of the bulb
Located in the middle connected to be sandwiched by
A thin tube sealed at one end of a tubular body;
The electrode of the tube to be placed is sealed at the unsealed end.
Main amalgam contained in a closed capillary ; the tubular body of the tube located in the middle of the valve being an unsealed end and
An auxiliary amalgam disposed at an end remote from the amalgam ; a cover to which the arc tube is attached; and a lighting circuit housed in the cover.

In this configuration, the outer diameter of the pipe is 8-11.
a mm, the valve discharge passage is formed in the bent shape three or more tube are sequentially connected, at both ends of the valve
The main amal at the end of the side of the tube where the electrodes are not sealed
The gum is sealed with a tubule located in the middle of the valve
From the end a and the main amalgam is not the end remote I by the auxiliary amalgam to FuSo luminous flux during startup with keeping the mercury vapor pressure within an appropriate range to shorten the time to stabilize. A small tube in the middle of the valve is sealed.
Auxiliary amalgam is placed at the end that is not
Even if the valve is as thin as 8-11mm, it is sealed
Auxiliary amalgam can be installed separately from the tubing, making production easier
Become.

A bulb-type fluorescent lamp according to claim 2 is the bulb-type fluorescent lamp according to claim 1, wherein the main amalgam is
An opening communicating with the inside of the accommodated thin tube from the inside of the tube
The minute is narrowed .

In this configuration, the main amalgam is contained.
Opening that communicates with the inside of the contained thin tube from the inside
The main amalgam in the tubule
Ru can be securely held.

[0014] self-ballasted fluorescent lamp according to claim 3, in claim 1 or 2 self-ballasted fluorescent lamp according, four or more
In a bulb with the upper tube connected sequentially, it is located near the middle position of the discharge path formed by each electrode at both ends of the bulb.
Auxiliary amalgam is provided at the end of the tubular body .

In this configuration, four or more pipes are
In a bulb configured by connecting sequentially, a tube close to an intermediate position of a discharge path formed by each electrode at both ends of the bulb .
By auxiliary amalgam at the end portion is provided, the rising characteristics of the light beam is improved.

According to a fourth aspect of the present invention, there is provided a bulb-type fluorescent lamp.
Item 4. The bulb-shaped fluorescent lamp according to any one of Items 1 to 3
The valves are arranged so that each tube corresponds to each side of the triangular cross section.
Is placed.

In this configuration, each tube of the valve is
Being arranged corresponding to each side of the cross section triangle
Thus, the valve can be made compact.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the fluorescent lamp of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show an embodiment of the present invention. FIG. 1 (a) is a development view of a fluorescent lamp bulb, and FIG. 1 (b) is a part A of FIG. 1 (a). 2, FIG. 2 is a side view of the fluorescent lamp, FIG. 3 is a plan view seen through a globe of the fluorescent lamp, and FIG. 4 is a partial cross-sectional view of the fluorescent lamp.

In the drawing, reference numeral 11 denotes a bulb-type fluorescent lamp (hereinafter, referred to as a bulb-type fluorescent lamp). The bulb-type fluorescent lamp 11 has a cover 13 having an E26-type base 12 and a translucent glove 14. , An arc tube 15 housed in a glove 14,
A lighting circuit 16 housed in the cover 13 is provided. And the envelope composed of the cover 13 and the globe 14
It is formed in an outer shape that approximates the standard dimensions of a general lighting bulb. That is, the height H1 including the base 12 is 110 to 125.
mm, the outer diameter D1 of the globe 14 is 50-60.
mm, and the outer diameter D2 of the cover is formed to be about 40 mm. The general lighting bulb is defined in JIS C 7501.
Is defined as The description will be made with the base 12 side being the lower side and the glove 14 side being the upper side.

The cover 13 has a cover body 21 made of a heat-resistant synthetic resin such as polybutylene terephthalate (PBT). The cover main body 21 has a substantially cylindrical shape that expands upward, and has a lower end covered with a base 12 such as an E26 type and fixed by bonding or caulking.

The globe 14 is made of a transparent or light-diffusing milky white or the like, and is formed of glass or synthetic resin into a smooth curved surface having substantially the same shape as a glass bulb of a general lighting bulb. The portion is fitted and fixed inside the opening at the upper end of the cover 13. The globe 14 can be combined with another member such as a diffusion film to improve the uniformity of luminance.

The globe 14 and a valve 31 described later are used.
In combination with the above, the light output irradiated in the direction of the base 12 increases, and a light distribution characteristic close to that of a general lighting bulb can be obtained.

The lighting circuit 16 is a horizontal circuit board, that is, a disc-shaped circuit board arranged perpendicular to the longitudinal direction of the arc tube 15.
A plurality of components (electric components) 25 and 26 are mounted on both sides of the circuit board 24, that is, on the lower surface on the base 12 side and on the upper surface on the arc tube 15 side, and an inverter circuit (high frequency Lighting circuit).

The circuit board 24 has a substantially disk shape, a diameter (maximum width dimension) of 1.2 times or less a maximum width D3 in a direction in which the valves 31 described later are juxtaposed, and is formed to be about 40 mm. .

Of the plurality of components 25 and 26, components 25 such as electrolytic capacitors and film capacitors having relatively low heat resistance are mounted on the lower surface of the circuit board 24, and relatively heat resistant components are mounted on the upper surface of the circuit board 24. A component 26, such as a chip-shaped REC (rectifier, rectifying element, diode bridge), a transistor, a resistor, and the like, having a small thickness and a thickness of about 2 to 3 mm is mounted. .

The arc tube 15 has a bulb 31, and a phosphor (phosphor layer) 32 is formed on the inner surface of the bulb 31. In the bulb 31, for example, a rare gas such as argon or mercury is filled as a sealing gas. Enclosed, a pair of electrodes 33 at both ends of the bulb 31
Are sealed by a pinch seal.

The valve 31 has three pipes 34a, 34b, 34c. The pipes 34a, 34b, 34c have, for example, an outer pipe diameter of 8 to 11 mm, an inner pipe diameter of 6 to 9 mm, and a wall thickness. Is 0.7 to 1.0
mm glass cross section is almost cylindrical and length is 11
0-130mm tube is smoothly curved at the middle part
It is formed in a substantially U-shape with 35. That is, each of the tubes 34a, 34b, and 34c includes a bent portion 36 that smoothly reverses, and a pair of straight pipe portions 37 that are continuous with each other at both ends of the bent portion 36.

Both ends of the tube 34b at the intermediate portion of the bulb 31 and one ends of the tubes 34a, 34c at both ends of the bulb 31 are sequentially connected by a communication tube 38 to form one continuous discharge path 39. ing. Bulb height H2 is 50-60mm, discharge path length is 200
~ 300mm, maximum width D3 in the direction of juxtaposition of valves is 32 ~ 43mm
Is formed.

In a state where the bulb 31 is incorporated in the bulb-type fluorescent lamp 11, the top 35 (bent portion 36) of each of the tubes 34a, 34b, and 34c has a longitudinal direction in which the vertical direction of the bulb-type fluorescent lamp 11 is the longitudinal direction. Are located at equal intervals on one circumference centered on the center axis of the pipe, and the straight pipe portions 37 of the pipes 34a, 34b, 34c
Are also positioned at equal intervals on a predetermined circumference centered on the central axis of the bulb-shaped fluorescent lamp 11, that is, each of the tubes 34a, 34b,
A straight pipe portion 37 of 34c is arranged corresponding to each side of the triangular cross section. Further, for each straight pipe part 37, the distance between the straight pipe parts 37 adjacent to each other in the circumferential direction is different from that of the pipe bodies 34a, 3a.
It is formed to be smaller than the outer diameter of 4b, 34c.

At one end of each of the pipes 34a, 34b, 34c, cylindrical thin tubes 40a, 40b, 40c, also called exhaust pipes, are protruded in communication with each other. However, the pipes at both ends of the valve 31
The thin tubes 40a, 40c of 34a, 34c protrude from the end (non-electrode side) opposite to the end where the electrode 33 is sealed. Valve 31
The exhaust of the inside is performed through each of the small tubes 40a, 40b and the small tube 40c or a part of these small tubes 40a, 40b, and 40c.
It is sealed by fusing 0b and 40c. FIG. 1 is a schematic view showing a state before each of the thin tubes 40a, 40b, 40c is sealed. The tube 34 is used for the thin tubes 40a, 40b, and 40c.
Openings 41 communicating with each other are formed in a, 34b and 34c, and the inner diameter L2 of the opening 41 is smaller than the inner diameter L1 of the inner part of the thin tubes 40a, 40b and 40c.

The thin tube 40a (or the thin tube 40c) closest to the electrode 33 among the thin tubes 40a, 40b, 40c of the tubes 34a, 34b, 34c, that is, the end of the valve 31 where the electrode 33 of the tube 34a is sealed. Amalgam 42 is sealed in the thin tube 40a at the end opposite to the part (non-electrode side) when sealing the thin tube 40a. The amalgam 42 is an alloy composed of bismuth, indium and mercury, is formed in a substantially spherical shape having a diameter larger than the opening 41 of the thin tube 40a, and controls the mercury vapor pressure in the valve 31 to an appropriate range. Has an action. The amalgam 42 may be made of an alloy of a combination of tin and lead, in addition to bismuth and indium.

In the bulb 31, an auxiliary amalgam which adsorbs mercury floating in the bulb when the lamp is turned off and releases the adsorbed mercury in the initial stage of the lighting including the start of the lamp may be arranged as required.

The electrode 33 is a filament coil composed of a triple coil formed by triple winding a tungsten (W) wire.
43, and this filament coil 43 is a beat stem 44
The wells 45 are supported by a pair of wells (introduction lines) 45 fixed to the outside of the tubes 34a, 34c via a dumet wire 46 sealed to glass at the ends of the tubes 34a, 34c. It is connected to the derived wire 47. The dumet wire 46 is sealed by a pinch seal portion 48 at the end of the valve. Then, when the bulb 31 is incorporated into the bulb-type fluorescent lamp 11, the wire 47 is connected to the lighting circuit 16.
Note that the filament coil 43 of the electrode 33 in FIG. 4 and the like is schematically shown.

Also, in FIG.
The relationship between the inner diameter b of the communication tube 38 and the width c of the electrode 33 is shown. The communication tube 38 is formed by connecting the openings formed by heating and melting before the sealing of the thin tubes 40a, 40b, and 40c and then blowing them out.

The inner diameter a of the bulb 31 and the inner diameter b of the communication pipe 38 are set to satisfy the relation of 0.6 <a / b <1.0, so that the lamp starting voltage can be reduced and the rise of the light output can be improved. .

The inner diameter a of the bulb of the bulb 31 and the width c of the electrode 33 are:
(Ac) / 2 <1.5 mm, that is, the distance between the inner surface of the bulb of the bulb 31 and the electrode 33 is set to 1.5 mm or less, and the bulb 31 melts due to excessive heat generation of the electrode 33 at the end of the lamp life. As a result, the sealed gas leaks and the lamp is turned off.

Alternatively, the weight of the electrode 33 per 200 mm is set within the range of 13 mg ± 30. The electrode 33 is generally thick, and it is difficult for the electrode 33 to be disconnected at the end of the lamp life. The side can be destroyed, stopped, and turned off.

Alternatively, the electrode 33 has a coil shape, the width c of the electrode 33 is in the range of 4 to 7 mm, and the number of 3rd turns of the coil per unit length is set to 1.3 turns / mm or more. At the end of the lamp life, glow discharge concentrates on the electrode 33, so that it is easy to disconnect and the lamp is not lit.

The bulb-shaped fluorescent lamp 11 thus configured has an input power rating of 14 W and the arc tube 15 has
At a high frequency of 2.5 W power, the lamp current is 280
mA, lamp voltage is 65V, phosphor of 3 wavelength emission type
With the use of 32, the total luminous flux is 810 lm.

Next, the operation will be described.

A plurality of thin tubes 40 provided at an intermediate portion of the valve 31
Of the a, 40b, and 40c, the amalgam 42 is sealed in the thin tube 40a closest to the electrode 33, thereby preventing the temperature of the amalgam 42 from becoming too high due to the thermal influence from the electrode 33. You can easily get warm.

That is, the amalgam 42 is connected to the electrode of the bulb 31.
Compared to the case where 33 is arranged at the sealed end, the heat effect from the electrode 33 on the amalgam 42 is reduced, the excessive rise in the temperature of the amalgam 42 is suppressed, and the mercury vapor pressure is maintained in an appropriate range. In addition, the distance from the amalgam 42 to both ends of the bulb 31 can be reduced, and the mercury vapor pressure in the entire bulb 31 can be made uniform and stable. Also, compared to the case where the amalgam 42 is arranged in the tube 34b in the middle part of the valve 31, the amalgam 42 can be easily heated,
The rising characteristics of the luminous flux are improved, and the time required to reach a stable state can be shortened.

As described above, among the plurality of thin tubes 40a, 40b, and 40c provided at the intermediate portion of the bulb 31, the thin tube 4 closest to the electrode 33 is used.
By enclosing the amalgam 42 in 0a (or the thin tube 40c), it is possible to prevent the temperature of the amalgam 42 from becoming too high due to the thermal influence from the electrode 33, and it is possible to easily warm the amalgam 42 at the time of start-up. The pressure can be kept in an appropriate range, and the time until the luminous flux is stabilized at the time of starting can be shortened.

By enclosing the amalgam 42 in the non-electrode side thin tube 40a of the tube 34a located at one end of the bulb 31, the mercury vapor pressure is kept in an appropriate range and the time until the luminous flux is stabilized at the time of starting is shortened. can do.

Since the portion of the opening 41 communicating with the inside of the tubular body 34a is narrower than the inner portion of the thin tube 40a in which the amalgam 42 is sealed, the amalgam 42 can be reliably held in the thin tube 40a.

When the inner diameter of the valve 31 is as thin as 6 to 9 mm,
Although it becomes difficult to form the thin tubes 40a, 40c together at the ends of the tubes 34a, 34c located at both ends of the valve 31 having the electrodes 33, the non-electrode sides of the tubes 34a, 34c located at both ends are difficult. By forming the thin tubes 40a and 40c at the ends, it can be easily manufactured.
Further, even if the valve 31 has a small tube inner diameter of 6 to 9 mm, there is no need to excessively reduce the diameter of the small tubes 40a, 40b, and 40c.

By arranging the three tubes 34a, 34b, and 34c of the valve 31 corresponding to the respective sides of the triangular cross section, the valve 31 can be formed without being bent into a complicated shape such as a saddle shape. The bulb 31 can be configured in a small size and can be applied to the bulb-type fluorescent lamp 11.

If the inner diameter of the bulb 31 is as small as 6 to 9 mm, the secondary voltage of the lighting circuit 16 is increased, so that the voltage at the time of starting the lamp needs to be increased and the rise of the light output is delayed. At the end of the lamp life, there is a problem that the electrode 33 generates heat and has a thermal effect on resin products such as the cover body 21 supporting the bulb 31. These problems are caused by the inner diameter a of the bulb 31 and the communicating pipe. 0.6 with the inner diameter b of 38
<A / b <1.0, the inner diameter a of the valve 31 and the electrode
This can be solved by setting the width c of 33 to the relationship of (ac) / 2 <1.5 mm.

The inner diameter a of the valve 31 and the inner diameter b of the communication pipe 38 are set to have a relationship of 0.6 <a / b <1.0, and the size of the inner diameter a of the valve 31 Increasing the inner diameter b can lower the lamp starting voltage and improve the rise of the light output.

The relationship between the inner diameter a of the bulb of the bulb 31 and the width c of the electrode 33 is (ac) / 2 <1.5 mm, that is, the distance between the inner surface of the bulb of the bulb 31 and the electrode 33 is set to 1.5 mm or less. However, by bringing the inner surface of the bulb 31 closer to the electrode 33, the bulb 31 melts and leaks due to the heat generated by the electrode 33 at the end of the lamp life, and the arc tube 15 can be turned off.

Alternatively, if the weight per 200 mm of the electrode 33 is set within the range of 13 mg ± 30, it becomes difficult for the electrode 33 to be disconnected at the end of the lamp life. Even if tube 15 does not leak,
15 can be turned off.

Alternatively, if the number of turns of the coil per unit length of the electrode 33 is set to 1.3 turns / mm or more, the glow discharge is concentrated on the electrode 33 at the end of the lamp life, so that the electrode 33 is liable to be disconnected. 15 can be turned off.

The lighting fixture can be constructed by mounting the bulb-type fluorescent lamp 11 on a fixture main body having a socket for connecting a general lighting bulb.

If necessary, an auxiliary amalgam may be provided. With this auxiliary amalgam, mercury can be released in the initial stage of lighting, and the rising characteristics of the luminous flux can be improved.

FIGS. 5 and 6 show an embodiment of the present invention. FIG. 5 is a development view of a fluorescent lamp bulb, and FIG. 6 is a circuit diagram of a lighting circuit of the fluorescent lamp.

One of the electrodes sealed at both ends of the bulb 31 is a preheating side electrode 33a, and the other is a non-preheating side electrode 3
3b, lighting circuit such as inverter connected to power supply E
16 corresponds to a lighting circuit system in which only one preheating side electrode 33a is preheated and started.

At one end of each of the pipes 34a, 34b, 34c of the valve 31, projecting tubes 40a, 40b, 40c are respectively provided so as to communicate with each other. Of these, the thin tubes 40a, 40c of the pipes 34a, 34c at both ends of the valve 31 are formed. Each of the electrodes 33a and 33b protrudes from the end (non-electrode side) opposite to the end where the electrodes 33a and 33b are sealed.

A main amalgam 42a as amalgam is sealed in the thin tube 40a closest to the preheating side electrode 33a.
The main amalgam 42a has the same configuration as the amalgam 42 described above.

An auxiliary amalgam 52a is attached to the wells 45 of the electrodes 33a and 33b, and the auxiliary amalgam 52a is enclosed in the bulb 31 together with the electrodes 33a and 33b. The auxiliary amalgam 52a is formed by plating or depositing indium on the surface of a metal foil such as stainless steel or nickel, or a high melting point metal foil such as molybdenum, tantalum or niobium.

The thin tube 4 of the tube 34b located in the middle of the valve 31
An auxiliary amalgam 52b is provided at an end opposite to 0b and at an end far from the main amalgam 42a. The auxiliary amalgam 52b has the same mercury vapor pressure characteristics as the auxiliary amalgam 52a, and adsorbs mercury vapor when the lamp is turned off and emits mercury vapor when the lamp is turned on.

The thin tube 40a closest to the preheating-side electrode 33a of the bulb 31, that is, the tube 3 located at one end of the bulb 31
By enclosing the main amalgam 42a in the thin tube 40a on the non-electrode side of 4a, the main amalgam 42a can be easily warmed by the heat from the preheating side electrode 33a at the time of starting, and the rising characteristics of the luminous flux can be improved.

Auxiliary amalgam placed on each electrode 33a, 33b
By using the auxiliary amalgam 52b disposed at the intermediate position between the electrode 52a and each of the electrodes 33a and 33b, mercury can be released in the early stage of lighting, and the rising characteristics of the luminous flux can be improved.

By enclosing in the valve 31 an auxiliary amalgam 52b having a mercury vapor pressure characteristic substantially similar to that of the main amalgam 42a and the auxiliary amalgam 52a,
In cooperation with 2a and the auxiliary amalgam 52a, the mercury vapor pressure in the bulb 31 can be kept in an appropriate range, and the time until the luminous flux is stabilized at the time of starting can be shortened.

In particular, when using the lighting circuit 16 of the type in which the preheating current flows as in this embodiment, the weight of the preheating side electrode 33a per 200 mm is 13 mg ±
By setting it within the range of 30, the preheating-side electrode 33a is unlikely to be disconnected at the end of lamp life, so that the lighting circuit 16 is destroyed and stopped before the arc tube 15 leaks, and the arc tube 15 leaks. If not, it can be turned off.

Next, another embodiment is shown in FIG.
FIG. 2 is a plan view seen through a globe of a fluorescent lamp.

The plurality of U-shaped tubes 34a, 34b, 34c are connected and bent so that the surfaces formed by the plurality of U-shaped tubes 34a, 34b, 34c become parallel and the surfaces face each other. A bulb 31 having a shaped discharge path 39 is formed.

In this case, the tubes 34a, 3
Since the distance L2 between the end of the adjacent tube 34b and the electrode 33 is smaller than the distance L1 between the other end of 4c and the electrode 33,
Providing the amalgam 42 (or the main amalgam 42a) in the end of the adjacent tubular body 34b improves the evaporation of mercury.

In each embodiment, four, five or more valve tubes may be connected.

[0070]

According to the self-ballasted fluorescent lamp according to claim 1, wherein, according to the present invention, a tube outer diameter of 8 to 11 mm, valve 3 or more of the tube are successively discharge path connected to the bent-shaped form smell
The electrodes of the tube located at both ends of the bulb are sealed.
The main amalgam at the end on the other side and the main amalgam at the end where the tubule of the tube located in the middle of the valve is not sealed.
By arranging the auxiliary amalgam far end from the arm, at the time of startup, the mercury vapor is released from the auxiliary amalgam
As a result, the time until the luminous flux is stabilized can be shortened. Valve
The tubing of the middle tube is attached to the unsealed end.
Since auxiliary amalgam is provided, the outer diameter of the pipe is as thin as 8 to 11 mm.
Even with a small valve, the auxiliary armature is
Lugum can be installed, making production easier.

According to the compact fluorescent lamp of the second aspect, in addition to the effect of the compact fluorescent lamp of the first aspect,
From the inner part of the thin tube containing the main amalgam into the tube
The narrow opening of the communication
The main amalgam can be reliably held .

According to the light bulb-shaped fluorescent lamp of the third aspect, in addition to the effect of the light bulb-shaped fluorescent lamp of the first or second aspect, four or more tubes are sequentially connected.
In a bulb, the discharge formed by each electrode at both ends of the bulb
By auxiliary amalgam at the end portion of the tube proximate the intermediate position of the road is <br/> arranged, it can be improved rising characteristics of luminous flux.

The bulb-shaped fluorescent lamp according to claim 4
According to this, the effect of the compact fluorescent lamp according to claim 1 or 2 is obtained.
In addition to the result, each tube of the valve corresponds to each side of the triangular cross section
The valve has a small configuration
Wear.

[Brief description of the drawings]

FIG. 1 shows an embodiment serving as a premise technology of the present invention,
(a) is a development view of a fluorescent lamp bulb, and (b) is an A of FIG. 1 (a).
It is an expanded sectional view of a part.

FIG. 2 is a side view of the fluorescent lamp.

FIG. 3 is a plan view seen through a globe of the fluorescent lamp.

FIG. 4 is a sectional view of a part of the fluorescent lamp;

FIG. 5 is a developed view of a bulb of the fluorescent lamp showing the embodiment of the present invention.

FIG. 6 is a circuit diagram of a lighting circuit of the fluorescent lamp;

FIG. 7 is a plan view seen through a globe of a fluorescent lamp showing another embodiment of the present invention.

[Explanation of symbols]

11 Fluorescent lamp 16 Lighting circuit 31 Bulb 33 Electrode 34a, 34b, 34c Tube 39 Discharge path 40a, 40b, 40c Small tube 42a Main amalgam 52b Auxiliary amalgam

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Takeo Yasuda 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Inside Toshiba Lighting & Technology Corporation (56) References JP-A 1-2220360 (JP, A) JP Hei 9-106782 (JP, A) JP-A-63-225470 (JP, A) JP 4-47895 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01J 61 / 28 H01J 61/30-61/34

Claims (4)

(57) [Claims] 1. A tube having an outer tube diameter of 8 to 11 mm , three or more U-shaped tubes being sequentially connected to form a bent discharge path, and both ends of the discharge path being positioned. a valve end electrodeposition <br/> poles are FuSo of; electrode of the tubular body located at both ends of the valve is not FuSo
Between the end of the valve and the pipe located at both ends of the valve
Sealed at one end of the middle tube which is connected as
And tubules; electrode of the tubular body located at both ends of the valve is not FuSo
Main amalgam contained in a capillary tube sealed at the side end
And; the thin tube of the tube located in the middle of the valve is not sealed
An auxiliary amalgam disposed at an end and at an end remote from the main amalgam ; a cover to which the arc tube is attached; and a lighting circuit accommodated in the cover; lamp. 2. An inner part of a thin tube containing a main amalgam.
2. The bulb-type fluorescent lamp according to claim 1, wherein an opening communicating with the inside of the tube is narrower than the opening . 3. A structure in which four or more tubes are sequentially connected.
Of the electrodes formed by the electrodes at both ends of the bulb
Auxiliary amalgam at the end of the tube close to the middle of the circuit
The bulb-type fluorescent lamp according to claim 1 or 2, wherein is disposed. 4. A valve is provided in which each pipe is provided on each side of a triangular section.
Claim 1 or Claim 2, characterized in that they are arranged correspondingly.
Is a bulb-shaped fluorescent lamp according to 2.