JPS62287546A - Manufacture of bent tube fluorescent lamp - Google Patents

Abstract

PURPOSE:To effectively increase exhaust efficiency and improve massproductivity by making exhaust processing using an exhaust tube with no amalgamation metal arranged. CONSTITUTION:An amalgam 5 consisting of indium and mercury is supplied after inserting a solid bar 4 into an exhaust tube 2a. Then, the exhaust tube 2a and 3a of a glass bulb 1 are attached airtight to respective heads B and C of an air exhauster A to make exhaust processing inside the bulb mainly through the exhaust tube 3a. After that, the tubes 2a and 3a are chipped off to obtain a bent fluorescent lamp 6. In this instance, the alamgam 5 is arranged only on the tube 2a with no arrangement on the tube 3a. Accordingly, exhaust resistance of the tube 3a becomes substantially small compared to that of the tube 2a, and exhaust processing is done using the tube 3a, resulting in increased exhaust efficiency.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for manufacturing a curved tube fluorescent lamp, and in particular to a method for manufacturing a curved tube fluorescent lamp, in particular a method for manufacturing a curved fluorescent lamp, in which amalgam is housed in an exhaust pipe extending from an end of a glass bulb. This invention relates to a method for exhausting a double U-shaped curved tube fluorescent lamp.

[Prior art]

Generally, in a fluorescent lamp device, as disclosed in Japanese Utility Model Publication No. 59-4446, an envelope consisting of a pace and a globe equipped with an E-shaped cap is divided into a first space and a second space using a partition plate. A double U-shaped curved fluorescent lamp having an exhaust pipe at the pulp end is placed in a first space on the glove side, and each exhaust pipe is inserted into a second space on the pace side through a partition plate. The exhaust pipe is housed so as to protrude from the exhaust pipe, and an amalgam or an amalgam-forming metal is disposed within each exhaust pipe.

According to this fluorescent lamp device, since the amalgam or amalgam-forming metal is disposed in the exhaust pipe protruding into the second space, when the curved fluorescent lamp is turned on, the interior of the first space is Even if the temperature becomes high, the decrease in efficiency can be reduced and the desired light output can be obtained.

[Problem that the invention seeks to solve]

Incidentally, in this fluorescent lamp device, the curved tube type fluorescent lamp is manufactured, for example, as follows. First, amalgam or amalgam-forming metal is supplied to exhaust pipes extending from both ends of a glass bulb. Next, the glass bulbs are set in an exhaust system such that each exhaust pipe is airtightly attached to a corresponding exhaust head. Next, in this state, predetermined exhaust operations such as exhausting impure gas from the glass bulb and filling with inert gas are performed through each exhaust pipe.

Afterwards, each exhaust pipe is manufactured by fy pumping.

However, the curved tube type fluorescent lamp necessarily has to be made compact because the fluorescent lamp device has a compact structure so that it can be used in the same way as an incandescent light bulb as a substitute for an incandescent light bulb. For this reason, as the diameter of the glass bulb is reduced, the diameter of the exhaust pipe is also reduced.

Accordingly, as the effective evacuation path in the evacuation pipe is reduced in the area where the amalgam or amalgam-forming metal is located, evacuation resistance increases and the evacuation process takes an undesirably long time.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for manufacturing a curved tube fluorescent lamp that can effectively improve exhaust treatment properties with a simple structure.

[Means to solve the problem]

Therefore, in order to achieve the above-mentioned object, the present invention is directed to the exhaust treatment of a curved fluorescent lamp, which is formed by sealing a stem having an exhaust pipe at both ends of a glass bulb. Only the amalgam or amalgam-forming metal is supplied, and the other exhaust pipe is mainly used for exhaust treatment.

[For production]

According to this invention, among the exhaust pipes extending from both ends of the glass bulb, amalgam or amalgam-forming metal is arranged only in one of the exhaust pipes, and the other exhaust pipe, which is not arranged with the amalgam or the amalgam-forming metal, is used. This is used for exhaust treatment. For this reason, exhaust efficiency can be effectively increased and mass productivity can also be improved.

[Embodiment flD] Next, an example of application of the present invention to a double U-shaped curved tube fluorescent lamp will be described with reference to FIGS. 1 to 3. In the figure, 1 is a glass bulb bent into a double U shape, and at least exhaust pipes 2a and 3a are provided at both ends of the glass bulb.
The stems 2 and 3 having the same diameter are sealed together.

First, as shown in FIG. 1, a glass blank rod 4 is inserted into the first exhaust pipe 2a, and an amalgam 5 made of indium and mercury is supplied. Then, the first and second exhaust pipes 2a and 3a of the glass bulb 1 are attached to the respective heads B and C of the exhaust device A in an airtight manner, and the impurities in the glass bulb are mainly removed through the second exhaust pipe 3a. Perform exhaust treatment such as discharging gas or filling with inert gas.

After completing the predetermined exhaust process, the first and second exhaust pipes 2a, 3
Chip off a. As a result, a curved tube-shaped fluorescent lamp 6 shown in FIG. 2 is obtained. The curved fluorescent lamp 6 is housed in an envelope 8 together with a ballast 7, as shown in FIG. 3, for example. This envelope 8 is composed of a base 10 having, for example, an E-shaped cap 9 and a light-transmitting globe 11, and a partition plate 12 divides the inside of the envelope into first and second spaces. It is divided into 3a and 3b. The curved fluorescent lamp 6 is connected to the first space 8a through the first and second exhaust pipes 2a.
, 3a are housed so as to protrude into the second space 8b via the partition plate 12, and the ballast 7 is housed in the second space 8b. Note that the second exhaust pipe 3a does not need to protrude into the second space 8b through the partition plate 12.

In this way, the amalgam 5 is placed in the first exhaust pipe 2a of the glass bulb 1, and the amalgam 5 is placed in the second exhaust pipe 3a. .

Not placed. For this purpose, the second exhaust pipe 3ai and the first
The exhaust resistance is much smaller than that of the exhaust pipe 2a. Since the exhaust treatment is performed using the second exhaust pipe 3a with low exhaust resistance, the exhaust efficiency can be significantly increased and the processability (mass productivity) can also be improved.

Moreover, since the glass empty rod 4 and the amalgam 5 are sequentially arranged in the first exhaust pipe 2a, the amalgam 5 is removed during the exhaust treatment.
Even if it becomes fluid, it can reliably prevent it from moving into the glass bulb. Therefore, the optical output characteristics can be kept constant.

It should be noted that the present invention is not limited to the above-mentioned embodiments; for example, the amalgam may be supplied to the exhaust pipe prior to the exhaust treatment, or may be supplied during the exhaust treatment, for example after the activation treatment of the electrode emitter. Alternatively, it can also be carried out by removing it from the exhaust system, supplying it, and then attaching it to the exhaust system again. Alternatively, instead of amalgam, only an amalgam-forming metal can be supplied, and amalgamation can be carried out using mercury dripped during the exhaust treatment. In addition to indium, appropriate metals such as tin and bismuth can be used as the amalgam-forming metal. Furthermore, the glass bulb can be of any suitable shape, such as a double U-shape or a U-shape.

〔Effect of the invention〕

As described above, according to the present invention, exhaust treatment is performed using an exhaust pipe in which no amalgam or amalgam-forming metal is disposed, so that exhaust efficiency can be effectively increased and mass productivity can also be improved.

[Brief explanation of drawings]

The drawings are explanatory diagrams of the method of the present invention, in which Fig. 1 is a cutaway side view of the main part showing the state in which the glass bulb is set in the exhaust device, Fig. 2 is a perspective view showing the state in which the evacuation process is completed, and Fig. 3 FIG. 2 is a partially cutaway side view showing the state of application to a fluorescent lamp device. In the figure, 1 is a glass bulb, 2.3 is a stem, and 2a. 3a is an exhaust pipe, 5 is an amalgam (or amalgam-forming metal), and A is an exhaust device.

Claims (4)

[Claims] (1) When exhausting a curved fluorescent lamp made of a glass bulb with a stem having exhaust pipes sealed at both ends, amalgam or amalgam-forming metal is supplied only to one exhaust pipe, and mainly to the other end. A method for manufacturing a curved tube fluorescent lamp, characterized in that exhaust treatment is performed using an exhaust pipe. (2) The method for manufacturing a curved tube fluorescent lamp according to claim 1, characterized in that, prior to exhaust treatment, amalgam or amalgam-forming metal is supplied to only one exhaust pipe. (3) The curved pipe according to claim 1, characterized in that the glass bulb is filled with inert gas during exhaust treatment, and then amalgam or amalgam-forming metal is supplied only to one exhaust pipe. A method of manufacturing a shaped fluorescent lamp. (4) Claim 1, characterized in that the glass bulb has one to three or more U-shaped meandering parts.
A method for manufacturing a curved tube fluorescent lamp according to paragraph 1.