JP2002042734A - Fluorescent lamps and lighting devices - Google Patents

Abstract

[PROBLEMS] To provide a fluorescent lamp which can withstand heat even in a glass bulb and can be easily provided with a magnet, prevents light flickering, and has improved light emission characteristics and workability of the lamp, and this lamp. It is an object of the present invention to provide a lighting device having: SOLUTION: A glass bulb 1 having a discharge path, a phosphor coating 5 formed on the surface of the glass bulb 1, a mount member 3A having an electrode 33 disposed in the glass bulb 1, and a Curie point of 750K. A fluorescent lamp L1 including the above-described permanent magnet M, a discharge medium made of mercury and a rare gas sealed in the bulb 1, and a lighting device 9 having the lamp L1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp capable of reducing flickering of light emission at the time of lighting and a lighting device equipped with the fluorescent lamp.

[0002]

2. Description of the Related Art In a fluorescent lamp, a very small amount of mercury and a rare gas such as argon are sealed as a discharge medium in a tube-shaped glass bulb, and the ultraviolet region of a transition spectrum of mercury atoms by discharge is used as an excitation source of a phosphor. It is used as a light source and plays a leading role in light emission. It has become a mainstay of lighting instead of an incandescent light bulb because of its excellent luminous efficiency and energy saving.

As a lighting method of the fluorescent lamp, a high-frequency lighting method using an inverter has recently been adopted because it has advantages such as small size, light weight, increased efficiency, and no flickering of light and is easy on eyes. However, ballast lighting methods, which are called iron-type ballasts or wire-wound ballasts, are still widely used because of their cost and the relationship with existing lighting equipment.

In this ballast lighting method, the fluorescent lamp emits light stably by vibrating an anode, which will be described later. However, when the tube diameter of a glass bulb such as a fluorescent lamp is reduced and the input power is reduced to a low wattage, the anode is There has been a problem that the vibration is not easily performed smoothly, and the flicker of light is likely to occur, which gives visual discomfort.

[0005] In order to start the lighting of the fluorescent lamp, first, the electrodes are preheated to emit thermoelectrons from the emitter (electron-emitting substance) and a predetermined voltage is applied between the pair of electrodes. As a result, the thermoelectrons on the cathode side are accelerated in the direction of the electrode (anode) on the opposite side to start discharging, and excite mercury electrons in the glass bulb to generate ultraviolet rays having a wavelength of 254 nm, thereby exciting the phosphor. Emit visible light.

[0006] In the vicinity of the electrode in the discharging process, electrons are emitted from the electrode during a cathode cycle, and electrons are incident on the electrode during an anode cycle. In this anode cycle, anode oscillation occurs.

That is, in the anode cycle, electrons are accelerated by the anode drop voltage and reach the anode voltage with large energy. Then, it collides with mercury electrons near the electrodes, causing excessive ionization. As a result, the electron density increases near the anode, and the anode drop voltage temporarily becomes zero, but thereafter, the electrons gradually diffuse and the electron density decreases. When the electron density decreases to a predetermined level, an anode drop voltage is generated again, electrons are accelerated, and the electron density increases. This cycle is called "anode vibration" and is a few kilohertz.
This vibration is repeated at a cycle of z.

In a state where the anode vibration is generated stably, light is emitted from the fluorescent lamp in a relatively stable state. However, when the anode vibration is repeatedly generated and extinguished irregularly, the fluorescent lamp emits light. The emitted light will flicker.

The cause of the disappearance of the anode vibration is that mercury ions ionized by the accelerating electrons in the anode cycle accumulate in an internal space surrounded by the last turn of the coil, and the mercury ions supplement the electrons reaching the anode surface. This is probably because the electron current is dispersed and flows into the entire coil, and the increase in electron density due to the anode drop voltage is unlikely to occur.

[0010] When the above-mentioned anode vibration is repeatedly generated and extinguished, flickering occurs due to the pulsation of the lamp current, and it is known that this phenomenon is particularly prominent in a low wattage fluorescent lamp, so improvement is desired. Was rare.

Therefore, a means for suppressing flickering of light due to irregular anode vibration in this fluorescent lamp is described in, for example, Japanese Patent Application Laid-Open No. 58-53151.

That is, the lead wire itself provided at the end of the bulb and provided with a filament electrode is constructed of a magnet or a magnetic material, and one of the lead wires is an N pole and the other is an S lead.
As a pole, a magnetic flux parallel to the longitudinal direction of the filament electrode is generated at the end of the bulb, and this magnetic flux deflects the discharge path in the bulb to the inner wall of the bulb to promote recombination of electrons, thereby generating anode glow. It describes that flicker is prevented.

[0013]

As described above, the flicker of light can be prevented by applying a magnetic field to the lead wire on which the filament electrode is provided, and the lead wire is made of a magnetic material and the magnetic force is applied from outside the bulb as described in the above-mentioned publication. Any configuration may be used, but the following problems were found when the lead wire itself was made of a magnet using a material described in the publication.

That is, (1) it is difficult in terms of plastic workability to form a thin lead wire having a diameter of about 0.5 to 1.0 mm using the magnet material described in the publication.

(2) The magnet material described in the publication has a low heat resistance and is used in the process of sealing a glass bulb and a mount in the lamp manufacturing process, and in the case of a non-straight lamp, in the process of bending and exhausting the bulb. It cannot withstand temperatures rising to about 800 ° C. and loses its function as a magnet.

(3) Further, mechanical inconveniences such as inability to cope with vibration or impact applied to the filament electrode or difficulty in connection by welding or hooking due to low extensibility of the lead wire. May occur.

The inventors of the present invention have investigated the structure of a lamp which can be mounted as it is on a new or existing lighting device of ballast lighting system and which does not cause flickering even if a magnet is used.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. It is possible to easily provide a magnet in a glass bulb while being thermally resistant. It is an object to provide an improved fluorescent lamp and a lighting device having this lamp.

[0019]

According to a first aspect of the present invention, there is provided a fluorescent lamp comprising: a glass bulb having a discharge path; a phosphor coating formed on the surface of the glass bulb; It is characterized by comprising a mount member having electrodes provided therein, a permanent magnet having a Curie point of 750 K or more, and a discharge medium containing mercury and a rare gas sealed in the bulb.

In this fluorescent lamp, if a permanent magnet having a Curie point of 750 K or more, preferably 900 K or more is provided in the bulb, sealing of the bulb and the mount for lamp manufacture can be achieved.
It is possible to prevent the magnet from withstanding the temperature at which the valve is heated in each step of bending (bending) the valve and exhausting the valve and losing the magnetic force.

The fluorescent lamp emits light when energized, and during operation, the diffusion of electrons and ions near the permanent magnet disposed in the bulb is accelerated by the influence of the magnetic force, and short-period anode vibration is generated. be able to. Thereby, near the electrode,
Light flicker can be prevented from occurring.

The Curie point of the permanent magnet is 750 K in the case of a straight tube type lamp which does not have a straight bulb or the like.
As described above, in the case of a non-straight tube lamp which heats and softens a bulb in an annular, U-shaped or meandering shape and bends (bends) it may be 1100K or more. Any permanent magnet having a Curie point about 50 ° C. higher than the above temperature in consideration of variations in thickness and the like may be used.

In the case of this non-straight tube lamp, it is better to bend the bulb first and then mount and seal the bulb than to bend the bulb after sealing the bulb and the mount. It is preferable because the thermal effect on the surface is low.

The fluorescent lamp to which the present invention is applied is as follows:
It can be used not only for ballast lighting type lighting fixtures using iron core type ballasts but also for high frequency lighting type fixtures.
The type of fluorescent lamp can be applied to a general type, a rapid start type, a compact type, and the like.

The shape of the glass bulb of the fluorescent lamp is not limited to a straight shape, but also a non-linear shape such as an annular shape, a U shape or a W shape, or a bent shape by connecting a plurality of glass tubes. Or a flat plate.

The electrodes are not limited to the coiled filaments, but may have other configurations. Further, the electrodes are not limited to hot cathodes but may be cold cathodes.

[0027] The fluorescent lamp according to claim 2 of the present invention comprises:
A glass bulb having a discharge path, a phosphor coating formed on the surface of the glass bulb, a permanent magnet having a Curie point of 750 K or more attached to a mount member having electrodes disposed in the glass bulb, And a discharge medium comprising mercury and a rare gas sealed in the bulb.

A permanent magnet is attached to a member constituting the mount, and the same operation as in the first aspect is achieved.

That is, the permanent magnet may be directly attracted and attached to the internal lead wire, support wire, shield or the like made of magnetic metal constituting the mount, or the internal lead wire, support wire, shield or stem may be attached. , Sandwiched by exhaust pipes, crimped, welded, wound through support members, etc.
It can be securely and firmly attached.

[0030] The fluorescent lamp according to claim 3 of the present invention comprises:
A glass bulb having a discharge path, a phosphor coating formed on the surface of the glass bulb, a mount member having electrodes disposed in the glass bulb, and a curie provided in the discharge path in the glass bulb. It is characterized by comprising a permanent magnet having a point of 750K or more and a discharge medium made of mercury and a rare gas sealed in the bulb.

A metal body such as a lead wire, an exhaust pipe or a stem is provided at an intermediate portion of the discharge path, and a permanent magnet is attached to these members directly or via a support member, thereby providing the same as in the above-mentioned claim 1. Plays a significant effect.

A fluorescent lamp according to a fourth aspect of the present invention comprises:
The permanent magnet provided in the glass bulb is Sm ₂ C
o ₁₇ , Sm ₂ (Co _1-x F _x ) ₁₇ (where 0 ≦ x ≦
0), Fe _{1- xy} Cr _x Co _y (0.1 ≦ x ≦ 0.3,
0.05 ≦ y ≦ 0.15).

The above composition is Sm_Two Co₁₇The magnet consisting of
Curie point is about 1200K, Sm_Two (Co_0.8 Fe_0.2 )
₁₇Consists of a Curie point of about 1100K, Fe_0.6 
Cr _0.2 Co_0.4 Has a Curie point of about 950
K, and all magnets are sealed, bent, and exhausted.
Can withstand heating temperature.

As described in the first aspect, since the heat receiving temperature differs between the straight tube lamp and the non-straight tube lamp, the magnets may be selectively used.

A lighting device according to a fifth aspect of the present invention is a lighting device having a fixture body, an iron core type ballast provided on the fixture body, and a lighting circuit device provided on the fixture body and connected to the lighting circuit device. And a fluorescent lamp according to any one of claims 1 to 4.

The fluorescent lamp according to any one of claims 1 to 4 is connected to a lighting circuit device having an iron core type ballast, and is lit to provide a lighting device having the functions described in claims 1 to 4. Can be provided.

[0037]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is a front view of a straight tube fluorescent lamp L1, and FIG. 2 is a partially enlarged cross-sectional front view of one end of the lamp L1 of FIG.

In FIG. 1, reference numeral 1A denotes a straight bulb which forms a discharge path made of soda lime glass and has an outer diameter of about 29.
mm and a length of about 600 mm. 2 and 2 are valves 1
The stem 31 of the mount 3A is a sealing portion formed at the end of the A.
Flare part is sealed. The stem 3 of this mount 3A
1 is sealed with an exhaust pipe 32 and a pair of lead wires 4 and 4.

The lead wires 4 are made of a magnetic metal such as a nickel-plated iron wire or a nickel wire.
1 and a welding wire 42 made of a dumet wire or the like and an external lead wire 43 such as a copper wire or a nickel wire.
A sealing wire 42 is sealed to the stem 31 and a coil-shaped electrode 33 wound with a tungsten wire filament is connected to the internal lead wires 41, 41 by means such as welding or hooking. . An emitter mainly composed of at least one oxide selected from barium Ba, calcium Ca and strontium Sr is applied and filled in the coil turns of the coiled electrode 33.

.. Are permanent magnets having Curie points.
For example, Sm of 750K or more_Two Co ₁₇(Samarium-Ko
The volume of pellets composed of (Bald) is about 20 mm.^Three 
Or a cylinder about 3mm in diameter x about 2-3mm in height
The inner lead wires 41 and 4 are shaped by their own magnetic force.
It is attached in a state where it is adsorbed to 1.

Reference numeral 5 denotes a phosphor coating formed on the inner surface of the glass bulb 1A. The phosphor coating 5 is coated with, for example, a three-wavelength rare-earth phosphor or a continuous-wave emission halophosphate phosphor. A liquid medium or amalgam-like mercury Hg and a rare gas such as argon Ar, krypton Kr, xenon Xe or the like, alone or in a mixture, are sealed in 1A as a discharge medium at about 300 Pa (Pascal).

The base 6 covers the sealing portions 2 at both ends of the bulb 1A, and is joined with an adhesive. The terminal of the base is connected to the external lead wires 43 led out of the sealing portion 2. Thus, a fluorescent lamp L1 having a rating of 20 W is configured.

Then, a base 6 is attached to a socket connecting the fluorescent lamp L1 to a lighting circuit device having an iron core type ballast, and electricity is supplied to the coiled electrode 33 via the lead wires 4 and 4.

The two coil-shaped electrodes 3 facing each other by this energization
A discharge is generated in a discharge path formed by the bulb 1A between the bulbs 3 and 33, ultraviolet rays such as 254 nm and 185 nm are generated from the evaporated mercury, and the phosphor is excited to turn on the lamp L1.
It shows predetermined light emission characteristics.

The lamp L1 is connected to the coiled electrode 3
The permanent magnets M, M
Since the internal lead wires 41 and 41 themselves have a magnetic force, the electrons and ions in the vicinity of the coiled electrode 33 are rapidly diffused by the influence of the magnetic force during lighting, and a very short-cycle anode vibration is generated. I do.

As a result, not only does flickering of light not occur in the vicinity of the electrode 33, but also the anode vibration is stably generated during lighting, so that the luminous efficiency of the lamp L1 is increased by increasing the anode drop voltage during lighting. The lamp L1 does not flicker due to a drop or an unstable anode drop voltage, and no discomfort is felt visually. Also, when the inner diameter of the bulb 1A was made smaller and the input power was reduced, the anode vibration could not be carried out smoothly and the light sometimes flickered. This was solved.

What is important is that the Curie point of the permanent magnet M disposed on the mount 3A in the fluorescent lamp L1 is 7 points.
When the temperature is equal to or higher than the Curie point, the temperature is about 400 ° C. at which the temperature near the internal lead wire 41 increases when the glass bulb 1A and the stem 31 of the mount 3A are heated and melted for sealing. Approximately 4 atmospheres of the impurity gas discharge temperature inside the valve 1A in the exhaust process inside the valve 1A
It can withstand temperatures of about 50 ° C.

Incidentally, the sealing portion 2 at the end of the valve 1A
In addition, the firing temperature of the adhesive for joining the base 6 through the adhesive is about 200 ° C. or less, and the temperature at the time of the base joining operation is lower than the temperature of the sealing and exhausting steps and has little effect.

As described above, by using the heat-resistant permanent magnet M having a Curie point of 750 K or more, the lamp L1 can be manufactured without any problem through the ordinary fluorescent lamp sealing and evacuation processes. .

Further, since the permanent magnet M is formed in a pellet shape such as a cylindrical shape, it can be easily formed, and can be attached by the self-adsorbing force of the magnet M by forming the internal lead wire 41 from a magnetic metal. However, there is an advantage that the mounting operation in the manufacturing process of the mount 3A can be easily performed.

The fluorescent lamp L1 (20W type) and the conventional fluorescent lamp having no permanent magnet (the structure other than the presence or absence of the magnet is the same as the lamp L1) at the initial lighting and 5
FIGS. 3A to 3D show a state in which the lamp voltage waveform after lighting for 000 hours is observed with an oscilloscope.

FIGS. 3 (a) and 3 (b) show the initial state of the fluorescent lamp L1 of the present invention and after 5000 hours of operation, and FIG.
(C) and (d) are the initial lighting of the conventional fluorescent lamp and 5
This is a voltage waveform after lighting for 000 hours, in which the vertical axis represents voltage (V) and the horizontal axis represents time (sec).

As is apparent from the figure, the fluorescent lamp L1 of the present invention has an initial lighting time and 50 times less than the conventional fluorescent lamp.
After lighting for 00 hours, the cycle of the anode vibration was short, and flickering was little or no.

FIG. 4 shows another embodiment of the fluorescent lamp of the present invention. The figure is a cross-sectional front view in which a part of one end of the lamp as a main part is cut away. In the figure, the same parts as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

In the fluorescent lamp L2 shown in FIG. 4, the stem 31 of the mount 3B is connected to the bulbs 1A in addition to the leads 4 and 4.
A support wire 44 made of a magnetic metal such as SUS (stainless steel) is implanted, and a nickel-plated iron plate is provided at the end of the support wire 44 so as to surround the side surface of the coil-shaped electrode 33. A metal ring 45 formed in a tubular or cap-like shape such as a rectangle, an oval, an oval or a circle is connected by means such as welding. Further, a permanent magnet M having a heat resistance of Curie point of 750K or more and having the same composition as that described above is attached to an intermediate portion of the support wire 44 in a state of being attracted by its own magnetic force.

The fluorescent lamp L in which the mount 3B is sealed
2, the permanent magnet M can withstand the sealing and exhausting steps to which the thermal effect is applied, similarly to the fluorescent lamp L1 of the above embodiment.

By the action of the permanent magnet M attached to the support wire 43 implanted in the stem 31, not only does the flicker of light not occur in the vicinity of the electrode 33, but also the anode vibration is stably generated during lighting. Therefore, the luminous efficiency of the lamp L2 does not decrease due to an increase in the anode drop voltage during lighting, and the entire lamp L2 does not flicker due to the instability of the anode drop voltage. No pleasure.

Further, a metal ring 45 provided so as to surround the coil-shaped electrode 33 catches a flying object from the electrode 33 and prevents it from going to the bulb 1A, and shields the electrode 33 which becomes the highest temperature during lighting. This has the effect of improving the appearance.

In the case of a lamp using the mount 3B surrounding the coiled electrode 33 and provided with the metal ring 45, the permanent magnet M may be attached to the metal ring 45 or the permanent magnet M may be used to form the metal ring 45 itself. You may do so.

Further, when the mount 3B having this shape is used, the following may be performed. That is, on one side surface (for example, the inner surface side) of the metal ring 45, there is provided a belt-like body to which a mercury alloy made of an alloy powder of mercury and titanium is adhered, a mercury releasing structure called GMEDIS (trade name), or the like. At the same time, a getter made of an alloy of aluminum and zirconium is applied to the other side surface (outer surface side) in a belt shape.

The lamp L2 provided with the mount 3B having such a structure exhausts the inside of the bulb 1A through the exhaust pipe 32 of the stem 31, activates the electrode 33, fills in a rare gas such as argon, and then exhausts. Tube 32 is sealed. When the metal ring 45 is induction-heated by a high-frequency induction heating coil (not shown) from the outside of the valve 1A, the mercury alloy or the mercury-releasing structure is heated to evaporate and release mercury.
A predetermined amount of mercury can be sealed in the bulb 1A.

The fluorescent lamp L2 is mounted on a socket of a lighting device such as a lighting fixture (not shown).
Lighting is performed by energizing the coiled electrodes 33, 33 via the lighting circuit device.

In the same manner as described above, the lamp L2 also has a stable anode vibration due to the action of the heat-resistant permanent magnet M attached to the support wire 43 implanted in the stem 31, so that no light flicker occurs. In addition to feeling better,
At the time of lighting, the coil-shaped electrodes 33, 3 which became high temperature by energization
Due to the heat of 3, the temperature of the metal ring 45 disposed surrounding the electrode 33 also rises, and the mercury alloy and the mercury releasing structure are heated and new mercury remaining in the mercury alloy and the like is gradually introduced into the valve 1A. The amount of mercury that is released and absorbed by the phosphor tympanic membrane 5 or the like can be newly replenished.

This replenishment of mercury can be carried out not only in a large amount but in a short time, but also in an appropriate amount for a long time, so that the emission characteristics of the fluorescent lamp L2 can be maintained at a high value for a long time, and the getter can be used when the lamp L2 is turned on. The temperature is raised to adsorb the impurity gas in the bulb 1A, and the blackening of the wall of the bulb 1A is reduced, so that the life of the lamp L2 can be extended.

The permanent magnet M is directly attached to the metal ring 45 surrounding the coiled electrode 33,
When the metal ring 45 itself is formed by the permanent magnet M, the heating of the metal ring 45 by the high-frequency induction heating coil requires an operation under conditions in consideration of the Curie point of the permanent magnet M.

The fluorescent lamp L2 (20W type) and the conventional fluorescent lamp having no permanent magnet (the structure is the same as that of the lamp L2 except for the presence or absence of the magnet). FIG. 5 shows a state in which the voltage waveform is observed with an oscilloscope, similarly to FIGS.
(A) to (d).

FIGS. 5 (a) and 5 (b) show the fluorescent lamp L2 of the present invention at the initial lighting and after 1000 hours of lighting.
(C) and (d) show the initial lighting of the conventional fluorescent lamp and 1
This is a voltage waveform after lighting for 000 hours, in which the vertical axis represents voltage (V) and the horizontal axis represents time (sec).

As is apparent from the figure, the fluorescent lamp L2 of the present invention has an initial lighting time and 10 times less than the conventional fluorescent lamp.
After lighting for 00 hours, the cycle of the anode vibration was short, and flickering was little or no.

In the above embodiment, the description has been given of the straight tube fluorescent lamps L1 and L2 in which the bulb shape of the fluorescent lamp is straight. However, the present invention is not limited to the straight bulb type lamp, and the bulb shape is annular. It may be bent in a non-straight shape such as a U-shape or a W-shape, or may be bent or bent by connecting a plurality of straight valves.

FIGS. 6 (a), 6 (b) and 7 show another embodiment of the fluorescent lamp of the present invention. FIG. 6 (a) is a front view of an annular fluorescent lamp L3, and FIG. 6 (b). FIG. 7 is a cross-sectional front view of the U-shaped fluorescent lamp L4 with a part of one end cut away, and FIG. 7 is a front view of a bent fluorescent lamp L5 to which a plurality of bent glass tubes are connected. The same parts as those described above are denoted by the same reference numerals and description thereof will be omitted.

The annular fluorescent lamp L3 shown in FIG.
The sealing portions 2 and 2 that seal the mounts 3A at both ends of the glass bulb 1B having a straight circularly curved shape are close to each other, and the base 6 is removed by bridging the sealing portions 2 and 2 at both ends. Is being worn.

The U-shaped fluorescent lamp L4 shown in FIG. 6 (b) has seal portions (pinch seal portions) 2, 2 formed by crushing both ends of a glass bulb 1C whose straight shape is bent into a U shape. The bead mount 3C and the exhaust pipe 32 are sealed. This bead mount 3C has a pair of internal leads 4
The intermediate portions 1 and 41 are embedded and fixed in the glass beads 46, and the permanent magnets M having the same composition as described above are attached to the support wires 47 made of a magnetic metal such as SUS, which are implanted in the glass beads 46, by magnetic attraction. The structure.

The bent fluorescent lamp L5 shown in FIG.
Is formed, for example, by connecting through a connecting tube 12 holes formed near the ends of three glass tubes 11, 11, and 11 that are bent in a U-shape and closed at both ends to form a bulb 1D. This bulb 1D is one in which one discharge path is formed through each of the glass tubes 11,..., And the block located at the end is formed by a mount 3A or a bead mount 3C using the stem 31 described above.
Here, for example, this is performed by crush sealing portions (pinch seal portions) 2 and 2 which seal the bead mount 3C. The fluorescent lamp L5 shown in FIG. 7 has a triangular shape when viewed from the tube axis direction even when the glass tubes 11, 11, 11 are arranged in a plane as shown. The valve may have a shape juxtaposed with the shape.

The fluorescent lamps L3 to L5 whose discharge paths are bent in an annular, U-shaped or meandering shape depend on the glass material of the bulbs 1B to 1D in the bulb bending process. Generally, since the glass tube is heated and softened to about 700 to 800 ° C. and bent into a predetermined shape, the permanent magnet M in the bulbs 1B to 1D is heated to about 700 ° C. which is higher than that of a straight bulb. Reach.

However, these fluorescent lamps L3 to L5
Generates a magnetic field without losing magnetic force by using the permanent magnet M having a high Curie point that withstands the temperature in the bulbs 1B to 1D at the time of bending, and is similar to the lamps L1 and L2 of the above-described embodiment. At the time of lighting, mount 3A or 3C
By the attracting action of the permanent magnet M attached to the lead wire 41 or the support wire 47, the fluorescent lamps L3 to L5 of improved quality can be provided, in which the anode vibration is stabilized, the light does not flicker, and the visual perception is improved.

It is to be noted that the lamps L3 to L5 and the like having bent bulbs for the above-described reasons are obtained by bending the bulb into a predetermined shape rather than bending the bulb into a predetermined shape after sealing the mount in a straight bulb. By sealing the mount, a magnet M having a low Curie point can be used because the thermal effect on the permanent magnet M is small and the degree of safety against heat can be increased.

Further, in the fluorescent lamps L1 to L5 of the above embodiment, the permanent magnets M are disposed on the mounts 3A to 3C which are sealed at the ends of the bulbs 1A to 1D. The permanent magnet M may be provided facing the discharge path in the bulb 1D as shown by.

In FIG. 7, one end 11a of the intermediate glass tube 11 has a sealing portion 21 in which the lead wire 4 is hermetically sealed.
Are formed, and a permanent magnet M is disposed on the inner lead wire 41 of the lead wire 4. The portion of the lead wire 4 projecting outside may be cut after the lead wire 4 is sealed.

When the permanent magnet M is disposed facing the intermediate portion of the discharge path in the bulb 1D, the magnetic force of the magnet M causes the lamp L5 to turn on when the lamp L5 is turned on, similarly to the case where the permanent magnet M is mounted on the mounts 3A to 3C. The diffusion of electrons and ions near the magnet M is accelerated by the influence of the magnetic force, and short-period anode vibration is generated.

As a result, not only the flickering of the light is hardly perceived, but also the anode vibration is stably generated during the lighting, so that the luminous efficiency of the lamp L5 is reduced due to the increase in the anode drop voltage during the lighting. The entire lamp L5 does not flicker due to the unstable anode drop voltage.

Further, the permanent magnet M at the intermediate portion of the discharge path is not limited to one, and may be provided at a plurality of locations. The permanent magnet M is provided between the mount sealed at the bulb end and the intermediate portion. It may be provided at a location or only one location.

In each of the fluorescent lamps L1 to L5 of the above embodiment, the permanent magnet M is directly adsorbed to a metal member such as a lead wire of the mounts 3A to 3C sealed in the bulbs 1A to 1D. However, the arrangement of the permanent magnet M in the valve is not limited to the arrangement directly on the metal member, but may be carried out by sandwiching, crimping, welding, or other members between other members (which may be a non-magnetic material). May be attached.

In FIG. 7, the sealing portion 22 is formed by sealing the exhaust pipe 32a at the other end 11b of the intermediate glass tube 11 so as to pass through the inside and outside of the glass tube 11.
The inside of the valve 1D may be evacuated and a rare gas may be filled using a.

That is, the respective exhaust pipes 32, 32, 32 of the valve 1D in which the sealing of the sealing portions 2, 2, 21, 22 has been completed.
a is airtightly connected to an exhaust port of an exhaust device (not shown), and the inside of the valve 1D is exhausted from the exhaust pipes 32 at both ends while heating the valve 1D to about 450 ° C.

Then, when the inside of the valve 1D reaches a predetermined degree of vacuum, an inert gas, for example, argon Ar, is continuously supplied from the central exhaust pipe 32a at a pressure of about 3.000 Pa. When the inside of the bulb 1D is cleaned by the inert gas flow, the coiled electrodes 33, 33 are energized while continuing the flow of the inert gas to decompose and activate the emitter applied to the electrodes 33, 33.

After the disassembly of the emitter is completed, the exhaust pipes 32, 32 at both ends are sealed, and about 300 Pa of argon Ar is sealed from the central exhaust pipe 32a.
The fluorescent lamp L5 is obtained by closing the exhaust pipe 32a.

As described above, the exhaust pipes 32, 32, 32a are provided at both ends and the intermediate portion of the valve 1D, and the exhaust pipes 32, 3 at both ends are provided.
2 is used for evacuation, and the exhaust pipe 32a in the middle is filled with an inert gas, so that the impure gas such as carbon dioxide gas generated during the flow of the inert gas and the decomposition of the emitter is discharged from the valve 1.
The distance passing through the inside of the valve 1D can be shortened, and adsorption to the inner wall of the valve 1D can be reduced.

Incidentally, the method of exhausting while flowing the inert gas into the valve 1D may include performing only the exhaust without flowing the inert gas on the way, and this is repeated alternately. You may. The inert gas used for the flow is preferably the same as the inert gas finally sealed in the valve 1D.

The three exhaust pipes 32, 32, 3
A fluorescent lamp (product type: EFD13EL-Z) manufactured by the above-described exhaust method provided with 2a, and manufactured by a conventional method in which two exhaust pipes are provided, an inert gas is supplied from one of the exhaust pipes, and exhausted from the other exhaust pipe. With the fluorescent lamp (product type: EFD13EL-Z)
The luminous flux value after time was measured.

As a result, the conventional fluorescent lamp provided with two exhaust pipes has an initial light flux of 852 Lm and a light flux of 81 hours after 100 hours.
The fluorescent lamp provided with three exhaust pipes had an initial light flux of 854 Lm and a light flux of 853 Lm after 100 hours had a light flux maintenance rate of 99.9% while the light flux maintenance rate was 95.1% at 0 Lm. It is considered that this lamp has no residual impure gas in the bulb, the blackening of the bulb 1D is extremely reduced, and the luminous flux maintenance rate can be improved.

Therefore, the generated impure gas is supplied to the valve 1
It has been found that it is possible to perform the efficient exhaust by reducing the adhesion to the inner wall of D and the like, and it is possible to reduce the blackening and improve the luminous flux maintenance ratio.

In the bulb 1D having such a structure, one end 11a or the other end 1a of the intermediate glass tube 11 is used.
1b, both the lead wire 4 for disposing the permanent magnet M and the exhaust pipe 32a may be sealed, or a stem having the exhaust pipe shown in FIG. 2 may be sealed.

Further, in the above-described various fluorescent lamps L1 to L5, the internal lead wires 41, 41 holding the coiled electrode 33 may protrude long toward the discharge space as shown in FIG.

If the tip of the internal lead wire has a short protruding length from the connecting portion of the coiled electrode, the anodic current irregularly moves between the end and the center of the coiled electrode. There was a problem of flickering.

Therefore, conventionally, a separate metal wire was connected to the tip of the internal lead wire as an anode by welding or the like to keep the anode current constant and prevent flickering. But,
In this configuration, work and equipment such as welding of a separate metal wire were required.

FIGS. 8A to 8C show a procedure for connecting the coil-shaped electrode 33 to the internal lead wire 41. FIG.

In this case, the internal lead wire 41 (FIG. 13A) is folded, for example, from a portion about 15 mm from the tip so that the vicinity of the bent portion is attached (FIG. 10B). The legs are placed crosswise, and the leading ends of the jumping lead wires 41 are pressed, and the legs are hooked (FIG. (C)).

At this time, by setting the length of the bent portion of the internal lead wire 41 and the leg portion of the electrode 33 to 5 mm or more, flicker can be prevented as in the case of the anode.

FIGS. 9 and 10 show an embodiment of a lighting apparatus according to the present invention. FIG. 9 is a perspective view of a lighting apparatus, and FIG.
0 is a cross-sectional front view in which a part of the bulb-type fluorescent lamp device is cut away.

The lighting device shown in FIG.
Is used with the fluorescent lamps L1 and L2 shown in FIGS. 1 and 4 mounted thereon. In FIG. 9, reference numeral 91 denotes a main body of a lighting fixture. The main body 91 has a housing 93 for accommodating a lighting circuit device 92 such as a fixture (not shown) for a building or the like, a power connection mechanism, an iron core type ballast and the like. Is provided. Are provided in the housing 93. Two fluorescent lamps having a mount 3A to which, for example, a permanent magnet M is attached are provided in the socket devices 95, 95,. L1 and L1 are mounted. Although not shown, a light control body such as a shade or a glove may be provided in the opening of the housing 93.

The fluorescent lamps L1 and L1 are supplied with power through a lighting circuit device 92 such as a power supply connection mechanism and a ballast, so that stable lighting can be achieved.

The lighting device shown in FIG. 10 is a light bulb type fluorescent lamp which can be turned on by mounting it on a conventional light bulb socket in which a fluorescent lamp having a bent glass tube bulb, a lighting circuit device and a base are integrally combined. The device 7.

This fluorescent lamp device (lighting device)
Is a fluorescent lamp L having a mount 3A to which a permanent magnet M is attached and having a glass tube bulb 1E bent into a saddle shape (WU type).
6 is joined to the base 71 via an adhesive or the like, and a lighting circuit device 75 including an iron core type ballast 73, a resistor, a capacitor 74, and the like is held on a substrate 72 opposed to the base 71. .

Reference numeral 76 denotes a cover member made of a synthetic resin material for covering the lighting circuit device 75. An E-shaped base 6 is attached to the base. Reference numeral 77 denotes a glove made of a light-transmitting synthetic resin material or glass, which has a shell shape covering the fluorescent lamp L6, and whose opening overlaps with the cover member 76 around the base 71 and is locked.

The illumination devices 9 and 7 shown in FIGS. 9 and 10 are used for the fluorescent lamps L1 and L
6, since the permanent magnet M is attached to the internal lead wire 4 of the mount 3A in the bulbs 1A and 1E, the anode vibration is generated stably during lighting as described above.
Light does not flicker.

Therefore, it is possible to provide the lighting devices 9 and 7 which have stable light emission characteristics and are not visually uncomfortable.

It is needless to say that the form of this lighting device can be applied according to the shape, use and purpose of various fluorescent lamps.

[0108]

According to the first aspect of the present invention, a permanent magnet which is excellent in heat resistance and does not decrease in magnetic force in the process of manufacturing the fluorescent lamp is provided in the bulb. It is possible to provide a fluorescent lamp of improved quality which does not cause flickering of light when the lamp is turned on and does not cause visual discomfort. This lamp can be used for lighting devices of ballast lighting system as well as high frequency lighting system.

According to the second aspect of the present invention, the permanent magnet is attached to a metal member such as an internal lead wire, a support wire or a shield, or a mount member such as a stem via a magnetic force of the magnet itself or a support member. The same effect as described in the item 1 is obtained.

According to the third aspect of the present invention, a metal body such as a lead wire, an exhaust pipe or a stem is provided at an intermediate portion of the discharge path, and a permanent magnet is attached to these members directly or via a support member. The same effects as those described in the first aspect are obtained.

According to the fourth aspect of the present invention, by using a magnet having a Curie point of 750 K or more, it is possible to withstand the heating temperatures in the sealing, bending, and exhausting steps. Since the heat receiving temperature differs between the straight tube lamp and the non-straight tube lamp, the magnets to be used may be properly used.

Further, in the invention according to claim 5, the fluorescent lamp according to any one of claims 1 to 4 is connected to a lighting circuit device having an iron core type ballast to be lit, whereby the fluorescent lamp is lit. It is possible to provide a lighting device having the same effects as described in the items 1 to 4.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a straight tube fluorescent lamp according to the present invention.

FIG. 2 is a partially enlarged sectional front view showing one end of the fluorescent lamp of FIG. 1;

FIGS. 3A and 3B are graphs showing lamp voltage waveforms of the fluorescent lamp according to the present invention and the conventional fluorescent lamp shown in FIG. 1 at the initial lighting and after lighting for 5000 hours, wherein FIGS. , Figures (c) and (d) are for a conventional fluorescent lamp.

FIG. 4 is a cross-sectional front view showing another embodiment of the fluorescent lamp according to the present invention, in which a part of one end of the lamp is cut away.

5 is a graph showing lamp voltage waveforms of the fluorescent lamp according to the present invention of FIG. 4 and a conventional fluorescent lamp at the initial lighting and after 1000 hours of lighting, and FIGS. 5A and 5B are the fluorescent lamps according to the present invention. , Figures (c) and (d) are for a conventional fluorescent lamp.

FIG. 6 shows another embodiment of the fluorescent lamp according to the present invention, wherein FIG. 6 (a) is a front view of a ring-shaped fluorescent lamp, and FIG.
It is sectional front view which cut out some one end parts of the character-shaped fluorescent lamp.

FIG. 7 is a front view showing another embodiment of the bent fluorescent lamp according to the present invention.

FIGS. 8A to 8C are explanatory diagrams showing a procedure for connecting a coiled electrode to an internal lead wire.

FIG. 9 is a perspective view showing an embodiment of a lighting device (lighting fixture) according to the present invention.

FIG. 10 is a partially cutaway front view showing another embodiment of a lighting device (bulb-shaped fluorescent lamp device) according to the present invention.

[Explanation of symbols]

 L1, L2: Fluorescent lamp (straight tube fluorescent lamp) L3: Fluorescent lamp (ring-shaped fluorescent lamp) L4: Fluorescent lamp (U-shaped fluorescent lamp) L5: Fluorescent lamp (bent fluorescent lamp) L6: Fluorescent lamp (bulb-shaped fluorescent lamp) Lamp) 1A to 1E: Glass bulb 2: Sealing part 3A to 3C: Mount 33: Electrode 4: Lead wire 41: Internal lead wire 5: Phosphor coating 7: Lighting device (lighting fixture) 9: Lighting device (light bulb type) Fluorescent lamp device) 91: main body of the fixture 92: lighting circuit device

Continuation of the front page (72) Inventor Yuichi Sakakibara 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Toshiba Lighting & Technology Corporation (72) Inventor Takashi Ito 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Toshiba Lighting & Technology Corporation In-company (72) Inventor Junya Tanaka 4-3-1 Higashi Shinagawa, Shinagawa-ku, Tokyo Toshiba Lighting & Technology Corporation

Claims (5)

[Claims] A glass bulb having a discharge path; a phosphor coating formed on a surface of the glass bulb; a mount member having electrodes disposed in the glass bulb; and a permanent magnet having a Curie point of 750K or more. A discharge medium comprising mercury and a rare gas sealed in the bulb; 2. A glass bulb having a discharge path; a phosphor coating formed on the surface of the glass bulb; and a Curie point attached to a mounting member having an electrode disposed in the glass bulb has a Curie point of 750K or more. And a discharge medium made of mercury and a rare gas sealed in the bulb. 3. A glass bulb having a discharge path; a phosphor coating formed on a surface of the glass bulb; a mount member having electrodes disposed in the glass bulb; A fluorescent lamp, comprising: a permanent magnet having a Curie point of 750K or more provided in the bulb; and a discharge medium made of mercury and a rare gas sealed in the bulb. 4. A permanent magnet provided in a glass bulb
Is Sm_Two Co₁₇, Sm _Two (Co_1-x Fe_x )₁₇(However,
0 ≦ x ≦ 0), Fe_1-xy Cr_x Co_y (However, 0.1 ≤ x
≦ 0.3, 0.05 ≦ y ≦ 0.15)
Claims 1 to 4, characterized in that it is a kind selected from
3. The fluorescent lamp according to any one of 3. 5. An apparatus main body; a lighting circuit device having an iron core type ballast provided on the apparatus main body; and a lighting circuit device provided on the apparatus main body and connected to the lighting circuit device.
And a fluorescent lamp according to any one of (4) to (4).