JPH08250067A - Bulb shape fluorescent lamp - Google Patents

Abstract

PURPOSE: To provide a bulb shape fluorescent lamp wherein a beam rise up characteristic is improved immediately after lighting the lamp further to prevent blackening of a fluorescent tube without losing product value of the lamp. CONSTITUTION: A mount 5, having an exhaust tube 2 and an electrode 4 supported by an internal lead wire 3, is provided in both end parts of a bulb, further in a position in the vicinity of the electrode 4, to provide a double U-shaped fluorescent tube 1 of connecting an auxiliary amalgam 6 to an internal introducing wire 3. A main amalgam 11 is provided in the exhaust tube 2 of the mount 5 of the fluorescent tube 1. In the auxiliary amalgam 6, indium is plated to a stainless steel mesh plate of plane shape formed in a rectangular shape with one end part formed into a fork by cutting. The auxiliary amalgam 6 has a plurality of side surfaces and two main surfaces of surface area larger than the respective surface area of these side surfaces and in a position in the vicinity of the electrode 4, so that one of this main surfaces is opposed to the electrode 4, the auxiliary amalgam is fixedly welded to the internal introducing wire 3.

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 bulb-type fluorescent lamp, a main amalgam is provided in a tube, a pair of electrodes is provided at both ends of the tube, and an auxiliary amalgam is provided near the electrode of an internal lead wire supporting the electrodes. A fluorescent tube, a holder fixedly holding both ends of the fluorescent tube, a lighting circuit for lighting the fluorescent tube, a case housing the lighting circuit, and a fluorescent tube held by the holder, and It is provided with a case and a glove forming an envelope (Japanese Patent Laid-Open No. 62-64044, Japanese Patent Laid-Open No. 4-47657, etc.).

The auxiliary amalgam is used to receive radiant heat from the electrodes and convective heat in the fluorescent tube, release mercury into the fluorescent tube as the temperature rises, and improve the rising of the luminous flux. It is a mesh plate plated with indium. This auxiliary amalgam has two main surfaces having a large surface area and side surfaces, and the main surfaces are welded to the inner lead wires in a direction perpendicular to the electrodes, in other words, facing the wall surface of the fluorescent tube. It is fixed.

[0004]

However, in such a conventional light bulb type fluorescent lamp, since the main surface of the auxiliary amalgam is oriented in the direction perpendicular to the electrodes, the area receiving the radiant heat generated by the electrodes. Is small. Therefore, there is a problem that the emission of mercury from the auxiliary amalgam into the fluorescent tube is delayed, and the rise of the luminous flux is delayed.

Further, since the main surface of the auxiliary amalgam is perpendicular to the electrodes, that is, the main surface faces the wall surface of the fluorescent tube, part of mercury emitted from the auxiliary amalgam adheres to the wall surface of the fluorescent tube. Or it will penetrate. As a result, the amount of mercury that contributes to light emission decreases at the beginning of lighting,
There is a problem that not only the rising of the luminous flux is delayed, but also the fluorescent tube is blackened and the appearance of the lamp is significantly impaired, resulting in a decrease in commercial value.

The present invention has been made to solve such a problem, and improves the luminous flux rising characteristics immediately after the lamp is turned on and prevents the blackening of the fluorescent tube, thereby deteriorating the commercial value of the lamp. The purpose is to provide a compact fluorescent lamp.

[0007]

SUMMARY OF THE INVENTION A self-ballasted fluorescent lamp according to the present invention comprises a main amalgam in a tube, a pair of electrodes at both ends of the tube, and an electrode of an internal lead wire for supporting the electrode. And a fluorescent tube provided with an auxiliary amalgam near the
In a light bulb-shaped fluorescent lamp provided with a holder fixedly holding both ends of the fluorescent tube, and containing the fluorescent tube, and a globe forming an envelope with a case, one of the main surfaces of the auxiliary amalgam At least a part of the structure is provided so as to face the electrode.

[0008]

With this configuration, since at least a part of one main surface of the auxiliary amalgam faces the electrode, it becomes easy to receive radiant heat and convective heat of the electrode, and mercury of the auxiliary amalgam adheres to the fluorescent tube wall surface. Alternatively, penetration can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A compact fluorescent lamp according to an embodiment of the present invention shown in FIG. 1 (hereinafter referred to as the product A of the present invention) has a double U-shaped fluorescent tube 1. The fluorescent tube 1 is provided with a mount 5 having an electrode 4 supported by an exhaust tube 2 and an internal lead-in wire 3 at both ends of a bulb having a phosphor film formed on its inner surface.
In addition, an auxiliary amalgam 6 is provided near the electrode 4 on the internal lead-in wire 3. Further, a holder 7 in which both ends of the fluorescent tube 1 are fixedly held with an adhesive, a lighting circuit 8 for lighting the fluorescent tube 1, and a case 9 in which the lighting circuit 8 is housed.
And accommodates the fluorescent tube 1 fixedly held by the holder 7,
Moreover, the case 9 and the globe 10 forming an envelope are provided. A main amalgam 11 is provided in the exhaust pipe 2 connected to the end of the fluorescent tube 1.

The auxiliary amalgam 6 has a rectangular shape with a short side of 2 mm and a long side of 7 mm, and as shown in FIG. 2, indium is plated on a planar stainless steel mesh plate whose one end is cut into two forks. It was done.
The auxiliary amalgam 6 has a plurality of side surfaces and two main surfaces each having a surface area larger than the surface area of each of the side surfaces, and one of the main surfaces faces the electrode 4 so as to face the electrode 4.
It is welded and fixed to one of the internal lead-in wires 3 at a position near. With this configuration, the auxiliary amalgam 6 is used for
Since the radiant heat and the convective heat can be efficiently received, mercury is actively released into the discharge space, and the luminous flux rises quickly in the initial stage of lighting. Also, auxiliary amalgam 6
Since the amount of mercury released from the fluorescent tube 1 toward the wall surface of the fluorescent tube 1 is reduced, the adhesion or penetration of mercury to the wall surface of the fluorescent tube 1 can be reduced, and the blackening of the fluorescent tube 1 is prevented.

Next, a compact fluorescent lamp of another embodiment of the present invention (hereinafter referred to as the present invention product B) will be described.

In this embodiment, in the same lamp configuration as the above embodiment, as shown in FIG.
The auxiliary amalgam 12 that has been twisted is fixed by welding to one of the internal introduction wires 3 holding the electrode 4, and the main surface of the one end of the auxiliary amalgam 12 faces the electrode 4 at the other end. It was done.

As a result, the auxiliary amalgam 12 and the internal lead-in wire 3 can be easily aligned during welding, and both of them can be more firmly fixed.

FIG. 4 shows the product A of the present invention, the product B of the present invention,
Also, the luminous flux rising characteristics of the conventional product are shown. In FIG.
The curve A is the product A of the present invention, the curve B is the product B of the present invention, and the curve C is the main surface of the auxiliary amalgam facing the wall surface of the fluorescent tube 1 and fixed by welding to the inner lead wire. Each case of the same conventional compact fluorescent lamp (conventional product) as in B and B is shown.

As is apparent from FIG. 4, the products A and B of the present invention have improved luminous flux rising characteristics at the initial stage of lighting as compared with the conventional products.

It was also confirmed that the products A and B of the present invention prevent the blackening which has conventionally occurred in the fluorescent tube.

[0017]

As described above, according to the present invention, the luminous flux can be started up faster than the conventional one, and further, the blackening of the fluorescent tube can be prevented to prevent the reduction of the commercial value. Form fluorescent lamp can be provided.

[Brief description of drawings]

FIG. 1 is a cutaway front view of a main part of a compact fluorescent lamp according to an embodiment of the present invention.

[FIG. 2] Similarly, an enlarged perspective view of a main part.

FIG. 3 is an enlarged perspective view of a main part of a compact fluorescent lamp that is another embodiment of the present invention.

FIG. 4 is a diagram showing a luminous flux rising characteristic of a compact fluorescent lamp.

[Explanation of symbols]

 1 Fluorescent tube 2 Exhaust tube 3 Internal introduction wire 4 Electrode 5 Mount 6,12 Auxiliary amalgam 8 Lighting circuit 11 Main amalgam

Claims (2)

[Claims] 1. A fluorescent tube in which a main amalgam is provided in a tube, a pair of electrodes is provided at both ends of the tube, and an auxiliary amalgam is provided in the vicinity of the electrode of an internal lead wire that supports the electrode, In a light bulb-shaped fluorescent lamp provided with a holder fixedly holding both ends of the fluorescent tube, and containing the fluorescent tube, and a globe forming an envelope with a case, one of the main surfaces of the auxiliary amalgam At least a part of the fluorescent lamp is provided so as to face the electrode. 2. The auxiliary amalgam is 9 in the middle part.
2. The screw is twisted by 0 °, one end of the auxiliary amalgam is fixed to the internal lead-in wire, and one main surface of the other end of the amalgam faces the electrode. The described bulb-shaped fluorescent lamp.