JP3405672B2 - Light bulb type fluorescent lamp - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In a conventional fluorescent bulb, a main amalgam is used to optimize the mercury vapor pressure in the tube in order to prevent a decrease in luminous efficiency at high temperatures. However, this configuration utilizes the property that the mercury vapor pressure of the main amalgam is lower than the vapor pressure of pure silver, so that the mercury vapor pressure is too low in the low temperature state at the start, and the rise of the luminous flux is poor. However, there is a problem that it takes time to reach a steady state.

Techniques for solving this problem include:
There is a technique in which an auxiliary amalgam that temporarily emits mercury at the time of start-up is provided in the fluorescent lamp, and this configuration improves the luminous flux rising characteristics. This type of technology is disclosed in, for example, Japanese Utility Model Laid-Open No. 63-38252, Japanese Utility Model Publication No. 4-47895, and the like.

FIG. 5 is a schematic diagram of a bulb-type 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 phosphor coating 55 is formed on the inner surface of the fluorescent tube 54, and a main amalgam 57, an auxiliary amalgam 58, an internal lead wire 59, a mount 60, an electrode 61, etc. are provided near the tube end 56 of the fluorescent tube 54. Has been. In this conventional technique, the auxiliary amalgam 58 has an electrode 61 attached to the tip of an internal lead-in wire 59 provided on a mount 60.
And the flare portion 63 of the mount 60.

According to the bulb-type fluorescent lamp of the prior art, the auxiliary amalgam 5 which temporarily releases mercury at the time of starting.
8 is connected to an internal lead-in wire 59 that supports the electrode 61 near the end 56 of the fluorescent tube to improve the luminous flux rising characteristics. 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 view of a fluorescent lamp having an auxiliary amalgam according to the prior art. Then, FIG. 7 shows an enlarged cross-sectional view of the portion VII of 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 phosphor coating 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 curved fluorescent tube 84, that is, in the middle of the discharge path. 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 discharges the mercury vapor into the fluorescent tube 84, thereby improving the rising of the luminous flux.

[0008]

However, the above-mentioned prior art has the following problems. Figure 5
In the light bulb shaped fluorescent lamp according to the related art shown in FIG. 1, since the auxiliary amalgam 58 is provided closer to the tube end portion 56 side of the fluorescent tube 54 than the electrode 61, the mercury vapor emitted from the auxiliary amalgam 58 is , Must pass through the vicinity of the electrode 61 and move into the fluorescent tube. However, since mercury vapor has a property of moving to a lower temperature, it is difficult to pass through the vicinity of the electrode 61 where the temperature becomes high. Therefore, the auxiliary amalgam 5 released by the heat of the electrode 61
The mercury vapor of No. 8 starts to move to the fluorescent tube end 56 side. Then, not only the rising of the luminous flux is delayed, but also the excess mercury vapor appears as mercury blackening at the tube end of the fluorescent tube, which lowers 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 is delayed, and it is not possible to obtain a sufficient effect of improving the rising of the luminous flux. Further, 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, and therefore, a fluorescent lamp or the like in which one bulb is bent is required. Installation is very difficult. That is, it is very difficult to manufacture the fluorescent lamp according to this conventional technique, and thus it is difficult to mass-produce it.

Therefore, the present invention has been made in order 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 rapidly moved into the fluorescent tube. An object of the present invention is to provide a bulb-type fluorescent lamp having an auxiliary amalgam structure capable of improving the start-up, preventing a decrease in the commercial value of the appearance, and being easily installed in a fluorescent tube of any shape.

[0011]

A compact fluorescent lamp according to the present invention for achieving the above object comprises a fluorescent tube, a lighting circuit for lighting the fluorescent tube, and a case containing the lighting circuit. , At least one end of the fluorescent tube, which is located closer to the tube end than the electrode, controls the mercury vapor pressure in the tube during steady lighting, and is located near the electrode to release mercury at startup. In a compact bulb-shaped fluorescent lamp provided with an auxiliary amalgam, the auxiliary amalgam is 2 to 20 m toward the side opposite to the tube end of the fluorescent tube when viewed from the electrode.
connected to the flare of the mount at a distance of m
And said that you are.

According to the light bulb type fluorescent lamp of the present invention, the auxiliary amalgam is closer to the central portion of the fluorescent tube than the electrodes provided on the fluorescent tube (the fluorescent tube of the fluorescent tube when viewed from the electrode). It is provided 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 through the vicinity of the electrode portion. As a result, the luminous flux rise of the compact fluorescent lamp becomes good, and since mercury vapor does not become excessive at the tube end portion of the fluorescent tube, mercury blackening can also be prevented. Further, when the distance between the electrode and the auxiliary amalgam exceeds 20 mm, if the support rod is tilted even a little when the mount is inserted into the fluorescent tube in the process of manufacturing the fluorescent tube, the support rod is not supported. Scrapes the phosphor on the inner surface of the fluorescent tube,
The appearance may be significantly impaired. When the distance between the electrode and the auxiliary amalgam is less than 2 mm, the auxiliary amalgam receives too much heat from the electrode and the effect is not maintained until the end of its life. There is a case where the electrodes are sputtered and the thermoelectrons of the electrodes do not fly and the life is shortened. 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.

Further, in the compact fluorescent lamp according to the present invention, the electrode is connected to a flare portion of the mount through an internal lead-in wire, and the auxiliary amalgam is connected to the flare portion of the mount through a support rod. It is preferably connected to the flare portion.

According to this preferable example, since the auxiliary amalgam is provided in the vicinity of the electrode via the support rod, only a lamp having two or more bulbs forming one discharge path by a bridge or the like is used. Instead, it is easily possible to install a single bulb such as a double U shape on a bent lamp. That is, it is possible to provide a compact fluorescent lamp that can be easily manufactured into any shape lamp.

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

According to this preferable example, since the support rod supporting the auxiliary amalgam is directly connected to the internal lead-in wire, the heat from the electrode at the time of start-up is applied to the internal lead-in wire and the internal lead-in wire. It will be conducted directly to the auxiliary amalgam through the support rod. Then, the auxiliary amalgam can efficiently receive the heat from the electrode at the time of starting, and accordingly, the temperature rise of the auxiliary amalgam also becomes faster. Therefore,
As the temperature of the auxiliary amalgam rises faster, the mercury vapor from the auxiliary amalgam also diffuses faster, so the luminous flux of the compact fluorescent lamp rises better.

Further, in the light bulb type fluorescent lamp according to the present invention, it is preferable that the auxiliary amalgam is provided so as to be located in the arc during discharging. According to this preferable example, the auxiliary amalgam is located on the central side of the fluorescent tube with respect to the electrode provided on the fluorescent tube (opposite the tube end of the fluorescent tube when viewed from the electrode). , And so as to be located in the arc during discharge. Therefore, 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 by these heats can move quickly into the fluorescent tube without passing through the vicinity of the electrode portion. As a result, the luminous flux rises in the bulb-type fluorescent lamp, the mercury vapor does not become excessive at the end of the fluorescent tube, and mercury blackening can be prevented.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) A light bulb type fluorescent lamp according to the first embodiment of the present invention shown in FIGS. 1 and 2 has a base 7 having a base 7 attached to one end side thereof, and a case 4 A glove 5 is attached to the end opening, and the case 4
The envelope 6 is constituted by the glove 5 and the globe 5. In the envelope 6, a fluorescent tube 1 and a lighting circuit 3 for lighting the fluorescent tube 1 are housed. In this embodiment, the double U type fluorescent tube 1 is used. Fluorescent tube 1
Both ends 15 of the fluorescent lamp 1 are held by a holder 2, and a phosphor coating 17 is applied to the inner surface of the fluorescent tube 1. Further, both ends 15 of the fluorescent tube 1 are provided with a main amalgam 8 located closer to the tube end 16 than the electrode 12 and for controlling the mercury vapor pressure in the tube during steady lighting. Electrode 1
2 consists of a tungsten filament coil,
It is installed and held at the tip of the internal lead-in wire 11. The auxiliary amalgam 9 that emits mercury at the time of starting is connected to the flare portion 14 of the mount 13 via the support rod 10. At this time, the auxiliary amalgam 9 is closer to the central portion of the fluorescent tube 1 than the electrodes 12 at both ends 15 of the fluorescent tube 1 (electrode 1
It is provided on the side opposite to the tube end portion 16 when viewed from 2.

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

When the bulb-shaped fluorescent lamp configured as described above is started, the auxiliary amalgam 9 provided on the central portion side of the fluorescent tube 1 rather than the electrodes 12 on both ends 15 of the fluorescent tube 1 is replaced by the auxiliary electrode amalgam 9. It receives heat and becomes mercury vapor. Since mercury vapor has a property of moving to a lower temperature, the mercury vapor emitted from the auxiliary amalgam 9 is heated to a high temperature by the electrode 12
It moves to the central part side of the fluorescent tube 1 on the opposite side. As a result, the luminous flux rises quickly.

Here, the light bulb type fluorescent lamp according to the first embodiment of the present invention (hereinafter referred to as the "first present invention product") and the light bulb type fluorescent lamp according to the prior art described with reference to FIG. (Hereinafter, referred to as “first conventional product”) and a fluorescent lamp according to the conventional technology described with reference to FIGS. 6 and 7 (hereinafter, referred to as “second conventional product”), The rising characteristics were measured. The distance between the electrode and the auxiliary amalgam in the vicinity of the electrode was 5 mm for all of the first invention product, 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 luminous 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 (%), showing the measurement results for each fluorescent lamp. The measurement result of the first invention product 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 is a relative representation of the luminous flux value of the fluorescent lamp at each lighting time, with the luminous flux value of the fluorescent lamp when stable as a reference (100%). is there.

As is apparent from FIG. 4, the rise of the luminous flux of the first invention product (curve A) is a relative luminous flux value 10 seconds after lighting, as compared with the first conventional product (curve B). , Improved by about 15%. Also, under the same conditions, it is improved by about 10% as compared with the second conventional product (curve C). Furthermore, observing the appearance of each fluorescent lamp, it was found that the first and second conventional products were
Blackening occurred near the tube end of the fluorescent tube within 0 minutes.
No blackening occurred in the first invention product.

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

[0025]

[Table 1]

As is clear from the above [Table 1], the electrode 1
By decreasing the distance between 2 and the auxiliary amalgam 9, the rise of the luminous flux can be gradually improved. From this, it is understood 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 luminous 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 products of the first invention, by adopting the configuration of the products of the first invention, 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 is 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 is within 20 mm, a remarkable effect is obtained.

Further, the distance between the electrode and the auxiliary amalgam is 2
When it exceeds 0 mm, the support rod 1 is used when the mount 13 is inserted into the fluorescent tube 1 in the manufacturing process of the fluorescent tube 1.
If 0 is slightly inclined, there is a possibility that the support rod 10 scrapes the phosphor 17 on the inner surface of the fluorescent tube 1 and significantly impairs the appearance. Further, 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 from the electrode 12 and the effect is not maintained until its life, or the indium content of the auxiliary amalgam 9 is reduced. There is a problem that the electrode 12 is sputtered and the thermoelectrons of the electrode 12 do not fly 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. Further, in consideration of variations in manufacturing, 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 cross-sectional view of a main part (corresponding to a portion II in FIG. 1) of a compact fluorescent lamp according to a second embodiment of the present invention. Is. The bulb-type fluorescent lamp according to the present embodiment basically has the same configuration as the bulb-type fluorescent lamp according to the first embodiment, but the support rod 30 supporting the auxiliary amalgam 29 is connected to the internal lead-in wire 31. By connecting the auxiliary amalgam 29 to the electrode 1
The difference is that the fluorescent lamp 1 is located closer to the center of the fluorescent tube 1 than the second fluorescent lamp.

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

As is apparent from FIG. 4, when the structure of the second invention product is used, the rising of the luminous flux is further improved as compared with the first invention product. As described above, the reason why the rising of the luminous flux of the second invention product is better than that of the first invention product is that the internal introduction line 31 is
It is considered that this is because the support rod 30 supporting the auxiliary amalgam 29 was connected.

The electrode 12 is connected to the internal lead-in wire 31. At the time of starting, the heat of the electrode 12 is transferred to the internal lead-in wire 31.
Direct conduction to. Then, as described above, the support rod 30 supporting the auxiliary amalgam 29 has the internal lead wire 3
Directly connected to 1. Then, the electrode 1 at the time of starting
The heat from 2 will be directly conducted to the auxiliary amalgam 29 via the internal lead-in wire 31 and the support rod 30. That is, the second invention product can more efficiently receive the heat from the electrode 12 at the time of starting than the first invention product, and accordingly, the temperature rise of the auxiliary amalgam 29 is increased. Also becomes faster. Therefore, if the temperature rise of the auxiliary amalgam 29 becomes faster, the auxiliary amalgam 2
Since the mercury vapor from 9 also diffuses quickly, as shown in FIG. 4, the second invention product is more
The rising of the luminous flux becomes good.

It was also confirmed that in the present embodiment as in the first embodiment, no blackening occurs near the tube end 16 of the fluorescent tube. In each of the above embodiments, the case where the bulb-shaped fluorescent lamp is configured by using the double U-shaped fluorescent tube has been described, but the present invention is not limited to this configuration, and for example, a U-shaped tube. The present invention can be applied to fluorescent tubes of any shape, such as three or four or more bridge-bonded tubes.

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, but the present invention is not limited to these, and for example, bismuth / lead. -Amalgam made of other metal such as amalgam using tin, amalgam using bismuth-indium-lead, or amalgam using bismuth-indium-tin may be used.

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

[0037]

As described above, according to the present invention,
By quickly moving the mercury vapor of the auxiliary amalgam released by the heat of the electrode during startup to the inside of the fluorescent tube, the luminous flux rise is improved, preventing a decrease in the commercial value of the appearance, and for any fluorescent tube of any shape. A compact fluorescent lamp having an auxiliary amalgam structure that can be easily installed can be obtained.

[Brief description of 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 cross-sectional view of a main part of a II part of the compact fluorescent lamp shown in FIG.

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

FIG. 4 is a diagram showing the luminous flux rising characteristics of the compact fluorescent lamp according to each embodiment of the present invention and the compact fluorescent lamp according to the related art.

FIG. 5 is a schematic cross-sectional view of a bulb-type fluorescent lamp having an auxiliary amalgam according to the related art.

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

FIG. 7 is an enlarged cross-sectional view of part VII of the fluorescent lamp shown in FIG.

[Explanation of symbols]

1 fluorescent tube 2 holder 3 lighting circuit 4 cases 5 gloves 6 envelope 7 base 8 Lord Amalgam 9,29 Auxiliary amalgam 10,30 Support rod 11,31 Internal lead-in line 12 electrodes 13 mount 14 Flare part 15 Both ends (of fluorescent tube) 16 Tube end (of fluorescent tube) 17 Phosphor

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenji Itaya Kenji Itaya 1-1, Sachimachi, Takatsuki City, Osaka Prefecture Matsushita Electronic Industrial Co., Ltd. (56) Reference JP-A-9-147795 (JP, A) JP-A 59-180948 (JP, A) JP 2-100257 (JP, A) JP 1-102844 (JP, A) JP 1-220360 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01J 61/28 H01J 61/067 H01J 61/30

Claims (4)

(57) [Claims] 1. A fluorescent tube, a lighting circuit for lighting the fluorescent tube, a case having the built-in lighting circuit, and at least one end of the fluorescent tube, which is located on the tube end side with respect to the electrode and is stationary. In a compact fluorescent lamp equipped with a main amalgam that controls the mercury vapor pressure in the tube at the time of lighting and an auxiliary amalgam that is located near the electrode and emits mercury at the time of starting, the auxiliary amalgam is seen from the electrode. Contact at a distance 2~20mm toward the opposite side of the pipe end portion of the fluorescent tube Te
The bulb-shaped fluorescent lamp is characterized in that it is connected to the flare part of the mount . Wherein said electrodes are connected to the flared portion of the Ma <br/> mount via the internal lead-in wire, the auxiliary amalgam is connected to the flared portion of the mount through the support rod The bulb-type fluorescent lamp according to claim 1, wherein Wherein the electrode, through the internal lead-in wire is connected to said flared portion of said Ma <br/> mount, the auxiliary amalgam, which via a support rod connected to said internal lead wire The bulb-type fluorescent lamp according to claim 1, wherein 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. .