KR0184947B1 - Compact fluorescent lamp unit having first and second sealed end portions separated by a support member - Google Patents

Abstract

Provided is a fluorescent lamp device capable of preventing deterioration of a holding part or the like without increasing the size.

At the end of life, when one of the emitters of the electrode coils 28 is consumed, one glow discharge of about 100 V occurs between the electrode coils 28 and 28. The impact of the ions increases and the electrode coil 28 on the side consumed by the emitter is overheated, burned out, and disconnected, and the inverter circuit 12 stops oscillation. At the end of the lifetime of the fluorescent lamp 21, it is possible to prevent the temperature of the periphery of the electrode coil 28 from rising more than necessary without continuously performing glow discharge between the electrode coils 28 and 28. The lamp attachment cylinder 23 holding the end portion 26 of the valve 25 of the fluorescent lamp 12 can prevent deterioration.

Description

Fluorescent lamp

1 is a cross-sectional view showing an embodiment of the fluorescent lamp device of the present invention.

2 is an exploded perspective view excluding the glove.

3 is a perspective view showing one step of forming an electrode coil.

4 is a perspective view showing the following process shown in FIG. 3 for forming an electrode coil;

FIG. 5 is a perspective view showing the following process shown in FIG. 4 for forming an electrode coil. FIG.

6 is a graph showing the spectral characteristics when the glove does not contain an ultraviolet absorber.

7 is a graph showing the spectral characteristics when the glove contains an ultraviolet absorber.

8 is a graph showing the relationship between amalgam and temperature.

9 is a circuit diagram showing an inverter circuit.

10 is a perspective view of the lighting apparatus.

* Explanation of symbols for main parts of the drawings

1 cover 2 cylindrical part

3: clasp 4: partition plate

5 rising side wall 6 flange portion

7: slit 8: slit

9: hook projection 11: fixed nail

12 inverter circuit 13 printed circuit board

14: circuit component 15: connection terminal

21 fluorescent lamp 22 external lead wire

23: cylinder portion with a lamp 25: valve

26: end portion 27: the center bending portion

28: electrode coil 29: auxiliary amalgam

28a: main wire 28b: sub wire

31: coffin 32: amalgam

33,34,41: thermosetting adhesive 35: glove

36: head 37: material storage

38: outer covering device 41: adhesive

51: full-wave rectifier a, b, c, d: terminal

C1, C2, C3, C4, C5: Capacitor L1: Inductor

Q1, Q2: field effect transistor CT1: input winding

CT2, CT3: control winding D1: diode

E: Commercial AC power supply F1: Fuse

FL: Fluorescent lamp device L2: Choke coil

Q3: trigger element R1: resistance

M1: first molybdenum wire M2: second molybdenum wire

ZD1, ZD2: Zener Diodes

The present invention relates to a fluorescent lamp device and a lighting device of a preheating type that can always stop oscillation of an inverter circuit at the end of its life.

In recent years, compact fluorescent lamps having a fluorescent lamp in which one zig-zag discharge path is formed as a whole by a saddle-shaped glass tube have been widely used.

As a bulb type fluorescent lamp incorporating this inverter circuit, for example, a structure described in Japanese Patent Application Laid-Open No. 61-168856 is known.

In Japanese Unexamined Patent Application Publication No. 61-168856, a twisted clasp for incandescent bulbs is formed in a plastic main body, and a glass tube is bent into a saddle shape on the outer side of the partition plate in the basic body. A lamp unit having an electrode coil having an emitter is provided at both ends of the stable glass tube, and the electrode coil vicinity of the lamp unit is attached and fixed to a holding part formed in the base body portion, and a glove containing the lamp portion is provided in the base body portion. Is attached to. An external lead wire is formed at both ends of the electrode coil, and the external lead wire is connected to the inverter circuit in the partition plate, and a voltage is applied between the electrode coils by the inverter circuit, and is transferred from the glow discharge to the arc discharge between the electrode lamps. The fluorescent lamp is lit.

However, in the configuration described in Japanese Patent Application Laid-Open No. 61-168856, when any emitter of the pair of electrode coils in the lamp portion is consumed and the fluorescent lamp ends, the electrode coil is heated and the holding portion is heated. It has a problem of deterioration.

On the other hand, in order to prevent the deterioration of the holding portion, it is necessary to keep the electrode coil at a predetermined distance from both ends where the glass tube is attached to the base body, so that the distance of the glass tube becomes long and the fluorescent lamp becomes large.

The present invention has been made in view of the above problems, and an object thereof is to provide a fluorescent lamp device and a lighting device which can prevent deterioration of a holding part or the like without increasing the size.

The fluorescent lamp device described in the first embodiment includes a fluorescent lamp having a pair of electrode coils having an emitter, an inverter circuit connecting one end of each pair of electrode coils to light up the fluorescent lamp; Devices connected between the other ends of the pair of electrode coils and externally covering the energized capacitor for resonance In a fluorescent lamp device housed in a device, a voltage is applied from the inverter circuit between the paired electrodes, the electrode coil is disconnected, and the oscillation of the inverter circuit occurs even when the emitter at the end of its life is consumed. To stop.

In the fluorescent lamp device according to the second embodiment, the fluorescent lamp device according to the first embodiment has an electrode coil of 8 MG to 12 MG and a lamp current of 250 mA to 350 mA.

In the fluorescent lamp device according to the third embodiment, in the fluorescent lamp device according to the second embodiment, the cold resistance value of the electrode coil is 2? To 4? And the resistance value of 5? Is set between the output end of the inverter circuit and the resonance capacitor. In the case of a short circuit, the voltage between the output terminals of the inverter circuit is an effective value of 260V or more.

The fluorescent lamp device according to the fourth embodiment includes a fluorescent lamp having a pair of electrode coils having an emitter, an inverter circuit connecting one end of each pair of electrode coils to light up the fluorescent lamp; In a fluorescent lamp device housed in a device that covers a resonant capacitor that is always energized and connected between the other ends of the pair of electrode coils, the electrode coil has a resistance of 8 MG to 12 MG and a cold resistance of 2 Ω to 4 Ω. The lamp current is 250 mA to 350 mA, and when the output end of the inverter circuit and the resonant capacitor are short-circuited with a resistance value of 5?, Respectively, the voltage between the output terminals of the inverter circuit is an effective value of 260 V or more.

The illuminating device described in the fifth embodiment is provided with the fluorescent lamp device in the first to fourth embodiments on the instrument body.

In the fluorescent lamp device of the first embodiment, the electrode coil is normally heated by applying a voltage of the inverter circuit to the electrode coil, and the electrode coil is always preheated, and the arc is discharged between the electrode coils, and the lamp is turned on. Even when the emitter is consumed at the end, a voltage is applied from the inverter circuit between the paired electrodes to cause a glow discharge, thereby disconnecting the electrode coil, stopping the oscillation of the inverter circuit, and ending the life of the electrode coil at the end of its life. By continuing, the surroundings of the fluorescent lamps are prevented from deteriorating.

In the fluorescent lamp device according to the first embodiment, in the fluorescent lamp device according to the first embodiment, the electrode coils are 8 MG to 12 MG and the lamp current is 250 mA to 350 mA, so that it can be reliably discharged, The electrode coil is reliably disconnected in a short time, and a long temperature rise is suppressed.

In the fluorescent lamp device according to the third embodiment, in the fluorescent lamp device according to the second embodiment, the cold resistance value of the electrode coil is 2? To 4 ?, and the short circuit between the output end of the inverter circuit and the resonance capacitor is 5? In this case, since the voltage between the output terminals of the inverter circuit is 260 V or more as an effective value, the electrode coil is reliably disconnected, and a long temperature rise is suppressed.

In the fluorescent lamp device according to the fourth embodiment, the electrode coils have 8 MG to 12 MG, cold resistance of 2 Ω to 4 Ω, lamp current of 250 kHz to 350 Ω, and 5 Ω between the output end of the inverter circuit and the resonance capacitor. When short-circuited by the resistance value, the voltage between the output terminals of the inverter circuit is more than 260V as an effective value. Therefore, it normally turns on by arc discharge between the electrode coils, and turns on the inverter between paired electrodes even when the emitter is exhausted at the end of its life. By applying a voltage from the circuit and causing glow discharge, the electrode coil is disconnected, the oscillation of the inverter circuit is stopped, and the electrode coil continues to overheat at the end of its life, thereby preventing deterioration around the fluorescent lamp. .

In the lighting apparatus described in the fifth embodiment, since the fluorescent lamp apparatuses of the first to fourth embodiments are attached to the mechanism body, deterioration can be prevented.

EXAMPLE

Hereinafter, an embodiment of a lighting device of the present invention will be described with reference to the drawings for a lighting device using a fluorescent lamp of the bulb type (FL).

In the fluorescent lamp device FL shown in FIG. 1, 1 is a cover, and the cover 1 is made of heat-resistant synthetic resin such as PBT resin, and at one end of the cover 1, a cylindrical portion 2 is provided. The cylindrical portion 2 is integrally formed, and a twisted clasp 3 such as an Edison type E26 type or the like is deposited, and the clasp 3 is formed by an adhesive or caulking or the like. It is fixed to 2).

In addition, the other end of the cover 1 is closed by the partition plate 4, and the partition plate 4 is formed of a heat resistant synthetic resin such as, for example, a PBT resin, and has a substantially circular dish shape. In addition, as shown in Fig. 2, the partition plate 4 is provided with a flanged part 6 on the upper edge of the opening side edge of the raised side wall 5, and the flange 6 has a circumferential direction. In this manner, four locking tongues 7 are formed, for example.

And these locking tongue pieces 7 are formed so that this flange part 6 may be divided in the circumferential direction by the slit 8 formed in the flange part 6. For this reason, these latching tongues 7 are elastically deformable in the radial direction.

Moreover, the locking projection 9 which hangs these locking tongues 7 is integrally formed in the inner surface of the cover 1 corresponding to these locking tongues 7. That is, when the cover 1 and the partition plate 4 butt against each other, the catching tongue 7 elastically deforms and rides over the catching 9 and catches the cover 1 and the partition plate 4 with the catching tongue 7. It is coupled by the engagement of the locking projection (9).

In addition, the fixing nails 11 and 11 are formed in the flange part 6 of the partition board 4, and the other fixing nail 11 is raised from the bottom wall of the position other than the partition board 4. As shown in FIG. Then, the printed circuit board 13 of the inverter circuit 12 which is a lighting device for high frequency is filtered by these fixed nails 11.

In addition, the inverter circuit 12 is located in a space covered by the cover 1 and attached to the partition plate 4, and the inverter circuit 12 is a high frequency circuit using a transistor inverter for the circuit board 13. The circuit part 14 for lighting is mounted and comprised.

In addition, the connection terminal 15 protrudes and is provided in one end of the printed circuit board 13, and these connection terminals 15 are electrically connected to the circuit components 14, and the saddle type fluorescent lamp The external lead wire 22 of the lamp 21 is wound and connected. The fluorescent lamp 21 may be any one of a U shape and a W shape.

And the lower surface of the partition board 4 is integrally formed with the cylinder part 23 and 23 with a lamp | ramp as a holding part. Fluorescent lamps 21 are attached to these lamp-mounted cylinders 23 and 23. The fluorescent lamps 21 have a power consumption of 15 W to 17 W and a lamp current of 250 mA to 350 mA. The brightness is about 60 W incandescent bulbs.

In the fluorescent lamp 21, both ends 26 and 26 of the valve 25 in which a phosphor film (not shown) is formed on the inner surface and a diluent gas such as mercury and argon are enclosed are arranged in parallel with each other. It is located in the direction of the clasp (3), and has a central bent portion 27 bent in a U-shape between the two ends (26, 26), the central bent portion 27 is both ends (26) It is curved to face the same direction as (26).

In addition, electrode coils 28 and 28 are sealed at both ends 26 and 26 of the valve 25, and auxiliary amalgams 29 and 29 are attached to these electrode coils 28 and 28, respectively. Then, the pair of external lead wires 22, 22 connected to the electrode coils 28, 28 are led outward from the end portions 26, 26 of the valve 25, respectively, so that the connection terminals 15, 15 are connected. For example, it is wound several times and connected.

Here, the electrode coil 28 is composed of triple coils as shown in FIGS.

That is, first, as shown in FIG. 3, the first molybdenum wire M1 and the main are arranged in parallel with the first molybdenum wire M1 of 6.3 MG. The 1.8-mg sub-wire 28b is wound by 0.08 mm pitch on the wire 28a, and the 1st molybdenum wire M1 is burned out. In addition, unit MG shows the mass represented by mg per 200 mm of length.

Next, as shown in FIG. 4, the main wire 28a and the sub wire 28b formed in this FIG. 3 are wound by 0.2 mm pitch to the 2nd molybdenum wire M2 of 100MG.

Then, the second molybdenum wire M2 is burned out, and as shown in FIG. 5, the number of turns per predetermined length is 3, the diameter is 1.0 mm, and the electrode coil 28 having a pitch of 0.7 mm is formed.

The electrode coil 28 has a cold resistance value of 2.6 Ω at an ambient temperature of 25 ° C.

In addition, fine pipes 31 and 31 protrude from both ends 26 and 26 of the valve 25, and at least one of these thin pipes 31 and 31 controls amalgam for controlling the vapor pressure of mercury during lighting. 32 is housed.

In addition, the auxiliary amalgam 29 and the amalgam 32 consist of bismuth (Bi)-indium (In)-lead (Pb)-mercury (Hg), and the ratio of each metal is 45.0 wt% <Bi <58.0 wt%, 1.5wt% ≦ In ≦ 4.5wt%, 35.0wt% ≦ Pb ≦ 47.0wt% and 2.5wt% ≦ Hg ≦ 6.0wt%, preferably 50.6wt% ≦ Bi ≦ 52.6wt%, 2.6wt% ≤ In ≤ 3.2 wt%, 39.5 wt% ≤ Pb ≤ 41.5 wt% and 3.6 wt% ≤ Hg ≤ 4.4 wt%.

In the fluorescent lamp 21, both ends 26 and 26 are inserted into the lamp mounting cylinders 23 and 23 formed in the partition plate 4 from below the partition plate 4, and these end portions ( It is fixed to the partition plate 4 by the thermosetting adhesive 33, such as silicone type, filled between 26 and 26 and the lamp mounting cylinder parts 23 and 23. As shown in FIG. The center bent portion 27 of the fluorescent lamp 21 is joined to the bottom surface of the partition plate 4 by a thermosetting adhesive 34 such as silicon.

For this reason, the fluorescent lamp 21 is fixed to the partition plate 4 by the three places of the both ends 26 and 26, and the center bending part 27 in total.

The fluorescent lamp 21 is covered with, for example, a glass glove 35, and the glass glove 35 has a cup shape with an open upper end.

The glove 35 may be made of transparent or optically acidic synthetic resin or glass, and the glove 35 may have a straight head 36 with a slightly smaller diameter at the upper end opening.

In addition, a material storage portion 37 is formed continuously at the opening end portion of the head portion 36 over the entire circumference, and the material current portion 37 heats the upper end opening portion of the glove 35. By softening, the molten material gathers and the material is current.

Moreover, the apparatus 38 which covered the outer part with the cover 1 and the glove 8 is comprised.

In addition, when the fluorescent lamp 21 is turned on by using the inverter circuit 12, the amount of ultraviolet light due to the rise of the tube wall load cannot be ignored. Therefore, a diffusion film (not shown) is formed on the inner surface of the glove 35. For example, ultraviolet absorbers of ultraviolet absorbing inorganic fine particles such as ultraviolet absorbing metal oxides absorbing ultraviolet rays containing ultraviolet rays having a wavelength of 185 nm are mixed to block ultraviolet rays.

In addition, since the ultraviolet-absorbing inorganic fine particles have an average particle diameter of less than 1 µm, the linear transmittance is increased, the visible light diffusing effect is reduced, and the volatile components adhere to the linear transmittance, and the inside is visible. Inorganic fine particles having an average particle diameter of 1 µm or more are mixed.

In addition, simply increasing the average particle diameter deteriorates the film surface and creates a shade. Thus, it contains 30% or more of the average particle diameter of 1 µm and 30% of the average particle diameter of 1 µm or more. Including the above, you may disperse | distribute distribution of particle diameter widely.

In addition, when coating the inside of the glove 35, materials as shown in Table 1 may be mixed.

By incorporating the ultraviolet absorbent into the glove 35 in this manner, conventionally, as shown in FIG. 6, a spectrum having a peak around 365 nm can be absorbed, and as shown in FIG. 7, the amount of ultraviolet radiation is reduced. Can be irradiated around visible light.

As shown in FIG. 1, the head portion 36 of the glove 35 has a ring shape formed between the inner surface of the cover 1 and the rising side wall 5 of the partition plate 4. The glove 35 is sandwiched between the inner surface of the cover 1 and the rising side wall 5 of the partition plate 4 by a thermosetting adhesive 41 such as silicone. In addition, the thermosetting adhesive 41 may be bonded to at least one of the inner surface of the cover 1 or the rising side wall 5 of the partition plate 4.

In addition, this thermosetting adhesive 41 is thermosetting, for example, silicone type is used, and the hardness at the time of hardening is 20 or more and 50 or less, In the case of silicone type, by adjusting the mixing ratio of the hardening | curing agent mixed with silicone, It is possible to change the hardness.

And the size of the outer covered device which consists of the cover 1 and the glove 35 is about 520 cm <3>, and is set to 600 cm <3> or less.

Next, the circuit configuration of the inverter circuit 12 will be described with reference to FIG.

A capacitor C1 is connected in parallel with the power supply E through fuses F1 at both ends of the commercial AC power supply E, and an inductor L1 is connected between the capacitor C1 and the full-wave rectifier 51. Connect. The electrolytic capacitor C2 is connected between the output terminals of the full-wave rectifier 51, and the drain of the field effect transistor Q1 is connected to the + pole of the electrolytic capacitor C2. A drain of the field effect transistor Q2 is connected to the source of Q1 and a negative electrode of C2 is connected to the source of Q2. One end of the input winding CT1 of the saturable current transformer CT is connected to the source of the field effect transistor Q1 and the drain of the field effect transistor Q2.

Further, the control winding CT2 of the saturable current transformer CT is connected between the gate and the source of the field effect transistor Q1, and the saturation current transformer CT is controlled between the gate and the source of the field effect transistor Q2. Connect the winding CT3. Further, a series circuit in which the Zener diode ZD1 and the Zener diode ZD2 are connected in reverse characteristics between the gate and the source of the field effect transistor Q2 and the series circuit of the resistor R1 and the capacitor C3 are connected in parallel. do.

Further, a series circuit of the resistor R2 and the capacitor C4 is connected in parallel with the C2, and the trigger element Q3 is connected to the gate of the Q2 from the midpoint of the R2 and the C4. The anode of the diode D1 is connected from the midpoint of R2 and C4, and the cathode is connected to the source of Q1. The resistor R3 is connected between the drain and the source of Q1.

The terminal a is connected in series to the saturable current transformer CT1 through the choke coil L2 and the condenser C4, and the terminal b is connected to the negative electrode of the full-wave rectifier 51, and the terminal a One end of each of the electrode coils 28 and 28 is connected to the terminal and b).

The terminals c and d are connected to both ends of the capacitor C5, and the other ends of the electrode coils 28 and 28 are connected to the terminals c and d.

In addition, the cold resistance value of the electrode coil 28 between the terminals a and c and between the terminals b and d is set to 2?

In addition, when the resistance value is shorted to 5? Between the terminals a and c and between the terminals b and d, a voltage of 260 V or more is generated between the terminals a and b.

Then, the procedure of assembling the fluorescent lamp device will be described.

First, the printed circuit board 13 in which the circuit components 14, such as a high frequency point, were previously mounted on the upper surface of the partition board 4 is fastened through the fixing nail 11. In addition, the fluorescent lamp 21 is fixed to the lower surface of the partition plate 4, and the fluorescent lamp 21 has a lamp mounting tube 23 having end portions 26 and 26 formed on the partition plate 4, respectively. 23), and the end parts 26 and 26 of these valves 25 and the lamp mounting cylinder parts 23 and 23 are fixed with the thermosetting adhesive 33. As shown in FIG. In addition, the center bend 27 of the valve 25 is joined to the bottom surface of the partition plate 4 by the thermosetting adhesive 33. In this way, the fluorescent lamp 21 is fixed with the thermosetting adhesive 33 while the end portions 26 and 26 of the valve 25 are inserted into the lamp fitting cylinders 23 and 23, and the central bending portion 27 Is bonded to the bottom surface of the partition plate 4 by the thermosetting adhesive 34, and is fixed to the partition plate 4 by three places in total.

In this state, the partition plate 4 is attached to the cover 1. This operation causes the locking tongue 9 formed on the flange 6 of the partition plate 4 to pass over the locking protrusion 9 formed on the cover 1, and the locking tongue 7 elastically deforms. Engaged in the locking projection 9, the cover 1 and the partition plate 4 is coupled.

Next, the inverter circuit 12 and the clasp 3 are electrically connected, and this clasp 3 is fixed to the cylindrical part 2 of the cover 1.

After the assembly is completed, the thermosetting adhesive 41 is filled between the outer circumferential surface of the rising side wall 5 of the partition plate 4 and the inner surface of the opening portion of the cover 1. Since the thermosetting adhesive 41 joins the partition plate 4 and the cover 1, the partition plate 4 is adhered to the cover 1 and prevented from escaping. While the thermosetting adhesive 41 has not yet cured, the glove 35 is covered with the fluorescent lamp 21, and the opening end of the glove 35 is outside the rising side wall 5 of the partition plate 4. It fits in between the circumferential surface and the inner surface of the opening part of the cover 1, and fills it in the thermosetting adhesive 41 filled here. Then, the thermosetting adhesive 41 adheres through the inner surface and the outer surface of the head part 36 of the glove 35, and has the drying of the thermosetting adhesive 41 in this state.

And when the thermosetting adhesive 41 dries, the glove 35 is joined to the rising side wall 5 of the partition side 4 and the inner surface of the opening part of the cover 1 via this thermosetting adhesive 41.

In addition, as shown in FIG. 10, the fluorescent lamp device FL is attached to a luminaire 61 having an Edison socket to which an incandescent lamp is attached to form a lighting device.

The lighting operation of the fluorescent lamp 21 will be described with reference to FIG.

First, when the AC voltage of the commercial AC power supply is full-wave rectified by the full-wave rectifier 51, is smoothed by the field effect transistor Q2, and the capacitor C4 is charged and the capacitor C4 becomes equal to or greater than a predetermined voltage value. The trigger element Q3 is turned on, the capacitor C3 is charged by the ON operation of the trigger element Q3, and the field effect transistor Q2 is turned on by raising the voltage of the capacitor C3. In response to the saturation of the saturable current transformer CT, a voltage is applied from the gate of the field effect transistor Q1 and the gate of the field effect transistor Q2 to the control winding CT2 and the control winding CT3. By generating a high frequency current, the fluorescent lamp 21 is started and turned on, that is, an arc discharge of about 40 V is applied between the electrode coils 28 and 28, and the electrode coils 28 and 28 are always preheated.

For example, at the end of life, when the emitters of some of the electrode coils 28 are consumed, one glow discharge of about 100 V is generated between the electrode coils 28 and 28, and the impact of ions increases and the emi The electrode coil 28 on the side consumed by the rotor is heated, burned out and disconnected, and between the terminals a and c, or between the terminals b and d, the choke coil L2 is opened. And since the resonance capacitor C5 is opened, resonance stops and the inverter circuit 12 stops oscillation.

In the state where the end glow is generated in the electrode coil 28, the terminal voltage between the terminals a and b is about 270V, the electrode coil 28 has an effective voltage of 12V, and an effective current value of 2A. . In other words, when emitters are applied to the electrode coils 28 and 28 on both sides, the discharge can be reliably transferred to the arc discharge.

Therefore, the fluorescent lamp 21 can be prevented from increasing in temperature more than necessary around the electrode coil 28 without continuing glow discharge between the electrode coils 28 and 28 at the end of the life of the fluorescent lamp 21. Deterioration of the attachment cylinder portion 23 holding the end portion 26 of the valve 25 of (21) can be prevented.

It is also conceivable to reduce the resistance of the electrode coil 28 in order to increase the output of the inverter circuit 12. However, shortening the entire length of the electrode coil 28 reduces the amount of emitter retention, which is not preferable. . In addition, if the MG is extremely small, the spot temperature rises abnormally, and the evaporation of the emitter is accelerated and the life is shortened. On the contrary, if the MG is extremely large, the spot is difficult to form and the lifetime is shortened by the sputter.

Here, as shown in Table 2, according to the experiment, when the main wire 28a is 6MG or less, the resistance of the electrode coil 28 rises, and the voltage applied between the terminal a and the terminal b is Since it does not glow, the two electrode coils 28 and 28 are energized and heated continuously, and the lamp part cylinder parts 23 and 23 deteriorate. On the other hand, when the main wire 28a is 14MG or more, the time until disconnection is too long, and there exists a possibility that the lamp attachment cylinder part 23 may deteriorate. Therefore, it is considered that the main wire 28a is preferably 8MG or more and 12MG or less.

According to the fluorescent lamp device described in the first embodiment, even when the emitter is consumed at the end of its life, a voltage is applied from the inverter circuit between the paired electrodes and the glow discharge is caused to disconnect the electrode coil, By stopping the oscillation and continuing the overheated state of the electrode coil, it is possible to prevent the surrounding of the fluorescent lamp from deteriorating without increasing the size of the device.

According to the fluorescent lamp device according to the second embodiment, in addition to the fluorescent lamp according to the first embodiment, the electrode coils are 8 MG to 12 MG and the lamp current is 250 mA to 350 mA, so that it can be reliably discharged, It is possible to reliably disconnect the electrode coil in a short time and to suppress a long temperature rise.

According to the fluorescent lamp device described in the third embodiment, in addition to the fluorescent lamp described in the second embodiment, the cold resistance values of the electrode coils are 2? To 4 ?, and the resistance values of 5? In the case of a short circuit, since the voltage between the output terminals of the inverter circuit is 260 V or more as an effective value, it is possible to reliably disconnect the electrode coil and to suppress the temperature rise for a long time.

In the fluorescent lamp device according to the fourth embodiment, the electrode coil has 8 MG to 12 MG, cold resistance of 2 Ω to 4 Ω, and a lamp current of 250 mA to 350 mA, between the output end of the inverter circuit and the resonance capacitor. When the circuits are shorted to resistance values of 5Ω, the voltage between the output terminals of the inverter circuit is 260V or more as an effective value, so that it can be discharged reliably, and the electrode coil can be reliably disconnected in a short time to suppress long-term temperature rise. have. According to the illuminating device described in the fifth embodiment, since the fluorescent lamp devices of the first to fourth embodiments are attached to the mechanism body, deterioration of thermal degradation can be prevented.

Claims (3)

A fluorescent lamp having a pair of electrode coils having an emitter, an inverter circuit connecting one end of each pair of electrode coils to light the fluorescent lamp, and a connection between the other ends of the pair of electrode coils In the fluorescent lamp device accommodated in the device covered with the resonant capacitor to be energized, the voltage is applied from the inverter circuit between the pair of electrodes even when the emitter at the end of life is exhausted, and the electrode coil Disconnecting and stopping oscillation of the inverter circuit. The fluorescent lamp device according to claim 1, wherein the electrode coils are 8 MG to 12 MG, and the lamp current is 250 mA to 350 mA. The cold resistance value of the electrode coil is 2Ω to 4Ω, and when the output end of the inverter circuit and the resonant capacitor are respectively shorted by a resistance of 5Ω, the voltage between the output end terminals of the inverter circuit is 260V or more as an effective value. Fluorescent lamp device, characterized in that.