JPH11162402A - Electric lamp type fluorescent lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric lamp type fluorescent lamp wherein the rise of a beam of light is improved, and commodity value in appearance is prevented from lowering, also which has an auxiliary amalgam structure which can be easily installed in a fluorescent lamp of any shape, by rapidly moving mercury vapor of an auxiliary amalgam emitted by the heat of an electrode into a fluorescent tube in the time of startup of the electric lamp type fluorescent lamp. SOLUTION: This electric lamp type fluorescent lamp is provided with a fluorescent lamp 1, a lighting circuit 3, a case 4 having the lighting circuit 3 built-in, a globe 5 covering the fluorescent lamp 1, a main amalgam 8 and an auxiliary amalgam 9, then an outer peripheral instrument 6 is composed of the case 4 and the globe 5. Here, the interval from a tube end part 16 of the fluorescent lamp 1 to the auxiliary amalgam 9 is set larger than the interval from the tube end part 16 of the fluorescent lamp 1 to the electrode 12, and the interval between the auxiliary amalgam 9 and the electrode 12 is set to be 2-20 mm.

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 A bulb-type fluorescent lamp according to the prior art uses a main amalgam to optimize the mercury vapor pressure in a tube in order to prevent a reduction in luminous efficiency at high temperatures. However, this configuration utilizes the characteristic that the mercury vapor pressure of the main amalgam is lower than the vapor pressure of pure mercury. Therefore, in a low temperature state at the time of starting, the rising of the luminous flux is poor because the mercury vapor pressure is too low. However, there is a problem that it takes time to reach a steady state.

[0003] Techniques for solving this problem include:
There is a technique in which an auxiliary amalgam for temporarily releasing mercury at the time of starting is provided in a fluorescent lamp, and the luminous flux rising characteristic is improved by this configuration. This type of technique is disclosed, for example, in Japanese Utility Model Laid-Open No. 63-38252 and Japanese Utility Model Publication No. 4-47895.

FIG. 5 is a schematic diagram showing a conventional fluorescent lamp having an auxiliary amalgam according to the prior art.
The bulb-type fluorescent lamp shown in FIG. 5 is configured using an envelope 53 including a case 51 and a globe 52, a fluorescent tube 54 provided in the globe 52, and the like. A fluorescent film 55 is formed on the inner surface of the fluorescent tube 54, and a main amalgam 57, an auxiliary amalgam 58, an internal introduction wire 59, a mount 60, an electrode 61, and the like are provided near a tube end 56 of the fluorescent tube 54. Have been. In this prior art, the auxiliary amalgam 58 is provided with an electrode 61 attached to the tip of an internal lead wire 59 provided on a mount 60.
And the flare portion 63 of the mount 60.

According to the conventional compact fluorescent lamp, the auxiliary amalgam 5 which temporarily releases mercury at the time of starting is provided.
8 is connected to an internal lead-in wire 59 supporting the electrode 61 near the fluorescent tube end 56 to improve the luminous flux rising characteristic. That is, the auxiliary amalgam 58 is intended to improve the rise of the luminous flux by receiving the heat of the electrode 61 at the time of starting and discharging mercury into the tube.

FIG. 6 is a schematic structural view of a fluorescent lamp having an auxiliary amalgam according to the prior art. FIG. 7 is an enlarged sectional view of a portion VII in FIG. The fluorescent lamp shown in FIGS. 6 and 7 has a bent fluorescent tube 84, electrode portions 91 provided at both ends of the fluorescent tube 84, a dummy stem 83, and a main amalgam 8.
7 and auxiliary amalgam 88 and the like. A fluorescent film 85 is formed on the inner surface of the fluorescent tube 84.

In this conventional fluorescent lamp, an auxiliary amalgam 88 is provided in the middle of the bent fluorescent tube 84, that is, in the middle of the discharge path. Then, the auxiliary amalgam 88 in the middle of the discharge path receives the heat of the arc at the time of starting the fluorescent lamp and emits mercury vapor into the fluorescent tube 84, thereby improving the rise of the luminous flux.

[0008]

However, the above-mentioned prior art has the following problems. FIG.
Since the auxiliary amalgam 58 is provided on the tube end 56 side of the fluorescent tube 54 with respect to the electrode 61 in the bulb-type fluorescent lamp according to the prior art shown in FIG. 1, the mercury vapor released from the auxiliary amalgam 58 , Must pass through the vicinity of the electrode 61 into the fluorescent tube. However, since the mercury vapor has a property of moving to a lower temperature, it is difficult to pass near the electrode 61 where the temperature becomes high. Therefore, the auxiliary amalgam 5 released by the heat of the electrode 61
The mercury vapor No. 8 starts to move to the fluorescent tube end 56 side. Then, not only does the rise of the luminous flux become slow, but also the excess mercury vapor appears as black mercury at the tube end of the fluorescent tube, lowering the commercial value.

Further, in the fluorescent lamp according to the prior art shown in FIGS. 6 and 7, since the auxiliary amalgam 88 is provided in the middle of the discharge path, only the heat of the starting arc can be received. , Cannot receive heat from the electrode portion 91. Therefore, the temperature rise of the auxiliary amalgam 88 becomes slow, and a sufficient effect of improving the rise of the luminous flux cannot be obtained. Also, in order to provide the auxiliary amalgam 88 in the middle of the discharge path, a mount (dummy stem 83 or the like) for supporting the auxiliary amalgam 88 is required. Installation is very difficult. That is, since it is very difficult to manufacture the fluorescent lamp according to the related art, mass production is difficult.

Accordingly, the present invention has been made to solve such a problem, and the mercury vapor of the auxiliary amalgam released by the heat of the electrode at the time of starting is quickly moved into the fluorescent tube to thereby reduce the luminous flux. It is an object of the present invention to provide a light bulb-type fluorescent lamp having an auxiliary amalgam structure which can be easily installed on a fluorescent tube of any shape, while improving startup and preventing a reduction in commercial value in appearance.

[0011]

According to the present invention, there is provided a fluorescent tube, a lighting circuit for lighting the fluorescent tube, a case incorporating the lighting circuit, and at least one of the fluorescent tubes. At one end, a main amalgam which is located closer to the end of the tube than the electrode and controls the mercury vapor pressure in the tube at the time of steady lighting, and an auxiliary amalgam which is located near the electrode and emits mercury at startup is provided. In the compact fluorescent lamp, the distance from the tube end of the fluorescent tube to the auxiliary amalgam is greater than the distance from the tube end of the fluorescent tube to the electrode, and the distance between the auxiliary amalgam and the electrode is 2 ~
It has a configuration that is 20 mm.

According to the bulb-type fluorescent lamp of the present invention, the auxiliary amalgam is located closer to the center of the fluorescent tube than the electrode provided on the fluorescent tube (when viewed from the electrodes, On the opposite side of the tube end) and near the electrode. Therefore, the mercury vapor released from the auxiliary amalgam due to the heat of the electrode can quickly move into the fluorescent tube without passing near the electrode portion. As a result, the rising of the luminous flux of the bulb-type fluorescent lamp becomes good, and the mercury vapor does not become excessive at the end of the fluorescent tube, so that mercury blackening can also be prevented. Further, when the distance between the electrode and the auxiliary amalgam exceeds 20 mm, in the process of manufacturing the fluorescent tube, if the support rod is slightly inclined when the mount is inserted into the fluorescent tube, the support rod Shaved the phosphor on the inner surface of the fluorescent tube,
The appearance may be significantly impaired. Further, when the distance between the electrode and the auxiliary amalgam is less than 2 mm, the auxiliary amalgam receives the heat of the electrode too much and the effect is not maintained until its life, or indium or the like of the auxiliary amalgam. In some cases, the electrodes are sputtered and the hot electrons of the electrodes do not fly, resulting in a shorter life. Therefore, in the present invention, in consideration of the above, the distance between the auxiliary amalgam and the electrode is set to 2 mm or more and 20 mm or less.

In the bulb-type fluorescent lamp according to the present invention, the electrode is connected to a flare portion of the mount via an internal lead-in wire, and the auxiliary amalgam is connected to the mount of the mount via a support rod. Preferably, it is connected to the flare.

According to this preferred embodiment, the auxiliary amalgam is provided in the vicinity of the electrode via the support rod, so that two or more bulbs can be formed only by a lamp having one discharge path formed by a bridge or the like. For example, it is also possible to easily install one bulb such as a double U-shaped bulb on a bent lamp. That is, it is possible to provide a bulb-type fluorescent lamp that can be easily manufactured for lamps of any shape.

In the bulb-type fluorescent lamp according to the present invention, the electrode is connected to a flare portion of a mount via an internal lead-in, and the auxiliary amalgam is connected to the internal lead-in via a support rod. Is preferably connected to

According to this preferred embodiment, since the supporting rod supporting the auxiliary amalgam is directly connected to the internal introduction line, heat from the electrode at the time of starting is reduced by the internal introduction line and the internal introduction line. Via the support rod, it will be conducted directly to the auxiliary amalgam. Then, the auxiliary amalgam can efficiently receive heat from the electrode at the time of starting, and accordingly, the temperature of the auxiliary amalgam rises faster. Therefore,
If the temperature of the auxiliary amalgam rises faster, the mercury vapor from the auxiliary amalgam also diffuses faster, so that the light flux of the compact fluorescent lamp rises better.

In the bulb-type fluorescent lamp according to the present invention, it is preferable that the auxiliary amalgam is provided so as to be located in an arc during discharge. According to this preferred example, the auxiliary amalgam is located closer to the center of the fluorescent tube than the electrode provided on the fluorescent tube (the side opposite to the tube end of the fluorescent tube when viewed from the electrode). , And located in the arc during discharge. Therefore, since the auxiliary amalgam can receive not only the heat of the electrode at the time of starting but also the heat of the arc,
The temperature rise of the auxiliary amalgam is accelerated. Therefore, the mercury vapor released from the auxiliary amalgam due to the heat can quickly move into the fluorescent tube without passing near the electrode portion. As a result, the rising of the luminous flux of the bulb-type fluorescent lamp is improved, and the mercury vapor does not become excessive at the end of the fluorescent tube, and blackening of mercury can be prevented.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) A bulb-type fluorescent lamp according to a first embodiment of the present invention shown in FIGS. 1 and 2 has a base 4 attached to the top of one end side of a case 4 and another The glove 5 is attached to the end side opening, and the case 4
An envelope 6 is constituted by the globe 5 and the globe 5. The fluorescent lamp 1 and a lighting circuit 3 for lighting the fluorescent lamp 1 are accommodated in the envelope 6. In the present embodiment, a double U-type fluorescent tube 1 is used. Fluorescent tube 1
Are held by the holder 2, and a fluorescent film 17 is applied to the inner surface of the fluorescent tube 1. Further, the main amalgam 8 is provided at both ends 15 of the fluorescent tube 1, which is located closer to the tube end 16 than the electrode 12 and controls the mercury vapor pressure in the tube during steady lighting. Electrode 1
2 comprises a filament coil made of tungsten,
It is erected and held at the tip of the internal introduction wire 11. The auxiliary amalgam 9 which releases mercury at the time of starting is connected to the flare section 14 of the mount 13 via the support rod 10. At this time, the auxiliary amalgam 9 is located closer to the center of the fluorescent tube 1 than the electrodes 12 at both ends 15 of the fluorescent tube 1 (electrode 1).
2 when viewed from the opposite side of the tube end 16).

Here, examples of the main amalgam 8 include those having a composition of 69.3% by weight of bismuth, 28.5% by weight of indium, and 3.5% by weight of mercury. The auxiliary amalgam 9 is, for example, one obtained by plating indium on a metal mesh base such as a stainless steel mesh.

When the light bulb shaped fluorescent lamp having the above-described configuration is started, the auxiliary amalgam 9 provided on the center portion of the fluorescent tube 1 with respect to the electrodes 12 on both ends 15 of the fluorescent tube 1 is turned on. Receiving heat turns into mercury vapor. Since the mercury vapor has a property of moving to a lower temperature, the mercury vapor emitted from the auxiliary amalgam 9 is heated by the electrode 12 having a high temperature.
To the center of the fluorescent tube 1 on the opposite side from the center. As a result, the light beam rises quickly.

Here, the bulb-type fluorescent lamp according to the first embodiment of the present invention (hereinafter referred to as "first present invention") and the bulb-type fluorescent lamp according to the prior art described with reference to FIG. (Hereinafter, referred to as a “first conventional product”) and a fluorescent lamp according to the prior art described with reference to FIGS. 6 and 7 (hereinafter, referred to as a “second conventional product”), and respective luminous fluxes are produced. The rise characteristics were measured. The distance between the auxiliary amalgam near the electrode and the electrode was 5 mm for all of the first present invention, the first conventional product, and the second conventional product. The measurement conditions are
The ambient temperature was 25 ° C. and the input voltage was 100V.

FIG. 4 shows the measurement results of the light flux rising characteristics performed as described above. In FIG. 4, the horizontal axis represents the lighting time (seconds), and the vertical axis represents the relative luminous flux (%), and represents the measurement results for each fluorescent lamp. The measurement result of the first product of the present invention is represented by curve A, the measurement result of the first conventional product is represented by curve B, and the measurement result of the second conventional product is represented by curve C. Here, the relative luminous flux (%) shown in FIG. 4 represents the luminous flux value of the fluorescent lamp at each lighting time relative to the luminous flux value of the fluorescent lamp in a stable state as a reference (100%). is there.

As is apparent from FIG. 4, the rise of the luminous flux of the first product of the present invention (curve A) is a relative luminous flux value 10 seconds after lighting as compared with the first conventional product (curve B). , About 15%. In addition, under the same conditions, compared to the second conventional product (curve C), it is improved by about 10%. Further, when observing the appearance of each fluorescent lamp, it is found that the first and second conventional lamps are turned on one after lighting.
Within 0 minutes, blackening occurred near the end of the fluorescent tube,
No blackening occurred for the first product of the present invention.

Next, in order to examine the relationship between the distance between the electrode 12 and the auxiliary amalgam 9 constituting the first product of the present invention and the relative luminous flux value, the distance between the electrode 12 and the auxiliary amalgam 9 was changed. Then, the luminous flux value was measured. The results are shown in the following [Table 1]. In Table 1, the relative luminous flux value (%) is based on the luminous flux value of the fluorescent lamp in a stable state (1).
00%), the luminous flux value of the fluorescent lamp 10 seconds after lighting is relatively expressed.

[0025]

[Table 1]

As apparent from the above [Table 1], the electrode 1
By reducing the distance between 2 and the auxiliary amalgam 9, the rising of the luminous flux can be gradually improved. From this, it can be seen that it is very effective to apply not only the heat of the arc but also the heat of the electrode 12 in order to accelerate the temperature rise of the auxiliary amalgam 9 and improve the rise of the light flux.

Table 1 also shows the relative luminous flux values of the first conventional product and the second conventional product when the distance between the electrode and the auxiliary amalgam is 5 mm. Comparing these conventional products with the first present invention product, by adopting a configuration like the first present product, in a wide range of the distance between the electrode and the auxiliary amalgam (range of 0 mm to 30 mm), It was confirmed that there was an effect on the rise of the luminous flux. In particular, it was confirmed that when the distance between the electrode and the auxiliary amalgam was within 20 mm, a remarkable effect was obtained.

Also, the distance between the electrode and the auxiliary amalgam is 2
If the distance exceeds 0 mm, the support rod 1 is inserted when the mount 13 is inserted into the fluorescent tube 1 during the manufacturing process of the fluorescent tube 1.
If the angle 0 is slightly tilted, there is a possibility that the support rod 10 scrapes the phosphor 17 on the inner surface of the fluorescent tube 1 and significantly deteriorates the appearance. On the contrary, when the distance between the electrode 12 and the auxiliary amalgam 9 is less than 2 mm, the auxiliary amalgam 9 receives too much heat of the electrode 12 and the effect is not maintained until its life, or the indium of the auxiliary amalgam 9 is reduced. There is a problem that the thermal electrons of the electrode 12 are not sputtered due to being sputtered on the electrode 12 and the life is shortened.

From the above, the distance between the electrode 12 and the auxiliary amalgam 9 is preferably 2 mm or more and 20 mm or less. In addition, in consideration of manufacturing variations, the distance between the electrode 12 and the auxiliary amalgam 9 is 4 to 15 m.
It is desirable to set it to about m.

(Second Embodiment) FIG. 3 is an enlarged sectional view of a main part (a part corresponding to II part in FIG. 1) of a bulb-type fluorescent lamp according to a second embodiment of the present invention. It is. The bulb-type fluorescent lamp according to the present embodiment has basically the same configuration as the bulb-type fluorescent lamp according to the first embodiment, except that the support rod 30 supporting the auxiliary amalgam 29 is connected to the internal introduction line 31. To connect the auxiliary amalgam 29 to the electrode 1
2 in that it is located closer to the center of the fluorescent tube 1 than 2.

Here, a bulb-shaped fluorescent lamp according to the second embodiment having the above-described configuration (hereinafter, referred to as a "second invention product") is produced, and this is also described in the first embodiment. In the same manner as in the above case, the luminous flux rising characteristics were measured. The result is shown as a curve D in FIG. 4 described above.

As is apparent from FIG. 4, the configuration of the second product of the present invention makes the rising of the light flux even better than that of the first product of the present invention. As described above, the rise of the luminous flux of the second invention product was better than that of the first invention product because the internal introduction line 31
This is probably because the support rod 30 supporting the auxiliary amalgam 29 was connected.

The electrode 12 is connected to the internal lead-in line 31. When starting, the heat of the electrode 12 is transferred to the internal lead-in line 31.
Conducts directly to Then, as described above, the support rod 30 supporting the auxiliary amalgam 29 is connected to the internal introduction line 3.
1 is directly connected. Then, the electrode 1 at the time of starting
The heat from 2 will be conducted directly to the auxiliary amalgam 29 via the internal introduction line 31 and the support rod 30. That is, the second present invention product can more efficiently receive the heat from the electrode 12 at the time of starting than the first present product, and accordingly, the temperature of the auxiliary amalgam 29 increases. Will also be faster. Therefore, if the temperature rise of the auxiliary amalgam 29 becomes faster, the auxiliary amalgam 2
Since the mercury vapor from No. 9 also diffuses quickly, as shown in FIG. 4, the second present invention is more effective than the first present invention,
The rising of the light beam becomes good.

Also in this embodiment, as in the first embodiment, it was confirmed that the vicinity of the tube end 16 of the fluorescent tube did not blacken. In each of the above embodiments, the case where the bulb-type fluorescent lamp is configured using the double U-type fluorescent tube has been described. However, the present invention is not limited to this configuration. The present invention can be applied to any shape of fluorescent tube, such as one having three or four or more bridges.

In each of the above embodiments, the case where bismuth indium is used as the main amalgam and indium is used as the auxiliary amalgam has been described. However, the present invention is not limited to these. Amalgam made of other metals such as amalgam using tin, amalgam using bismuth indium tin, or amalgam using bismuth indium tin may be used.

Further, in each of the above embodiments, the main amalgam and the auxiliary amalgam are described for the bulb-type fluorescent lamp provided at both ends of the fluorescent tube, but the present invention is not limited to this configuration. Depending on the case, it may be provided in only one of them.

[0037]

As described above, according to the present invention,
The mercury vapor of the auxiliary amalgam released by the heat of the electrodes at the time of start-up is quickly moved into the fluorescent tube to improve the rise of the luminous flux, to prevent a reduction in the commercial value of the appearance, and to make the fluorescent tube of any shape possible. A bulb-type fluorescent lamp having an auxiliary amalgam structure that can be easily installed can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a compact fluorescent lamp according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of a part II of the compact fluorescent lamp shown in FIG.

FIG. 3 is an enlarged sectional view of a main part (a part corresponding to part II in FIG. 1) of the compact fluorescent lamp according to the second embodiment of the present invention;

FIG. 4 is a diagram showing a light flux rising characteristic of the bulb-shaped fluorescent lamp according to each embodiment of the present invention and the bulb-shaped fluorescent lamp according to the related art.

FIG. 5 is a schematic sectional view of a compact fluorescent lamp having an auxiliary amalgam according to the prior art.

FIG. 6 is a schematic sectional view of a fluorescent lamp having an auxiliary amalgam according to the prior art.

FIG. 7 is an enlarged sectional view of a portion VII of the fluorescent lamp shown in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluorescent tube 2 Holder 3 Lighting circuit 4 Case 5 Glove 6 Envelope 7 Base 8 Main amalgam 9, 29 Auxiliary amalgam 10, 30 Support rod 11, 31 Internal introduction line 12 Electrode 13 Mount 14 Flare part 15 (of fluorescent tube) Ends 16 Tube end 17 (of fluorescent tube) 17 Phosphor

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kenji Itaya 1-1, Komachi, Takatsuki City, Osaka Prefecture Matsushita Electronics Corporation

Claims (4)

[Claims] 1. A fluorescent tube, a lighting circuit for lighting the fluorescent tube, a case containing the lighting circuit, and at least one end of the fluorescent tube located at a position closer to a tube end than an electrode. In a bulb-type fluorescent lamp including a main amalgam which controls mercury vapor pressure in a tube at the time of lighting and an auxiliary amalgam which is located near the electrode and emits mercury at the time of starting, the tube end of the fluorescent tube includes The distance to the auxiliary amalgam is greater than the distance from the tube end of the fluorescent tube to the electrode, and the distance between the auxiliary amalgam and the electrode is 2 to 2.
A bulb-type fluorescent lamp having a length of 20 mm. 2. The method according to claim 1, wherein the electrode is connected to a flared portion of the mount via an internal lead-in, and the auxiliary amalgam is connected to the flared portion of the mount via a support rod. The bulb-type fluorescent lamp according to claim 1. 3. The method according to claim 2, wherein the electrode is connected to a flared portion of the mount via an internal lead-in, and the auxiliary amalgam is connected to the internal lead-in via a support rod. Item 2. A bulb-type fluorescent lamp according to item 1. 4. The bulb-type fluorescent lamp according to claim 1, wherein the auxiliary amalgam is provided so as to be located in an arc during discharge. .