JPS6151743A - Incandescent lamp-type fluorescent lamp - Google Patents

Abstract

PURPOSE:To reduce the size of an incandescent lamp-type fluorescent lamp by using pins and plate electrodes to electrically connect the discharge tube and the base. CONSTITUTION:The discharge tube of an incandescent lamp-type fluorescent lamp and its base can be attached to and detached from each other. And, they are electrically connected through metallic pins 11. In a base case 7, a stabilizer 8 and a starter 9 are installed and also female electrodes 13 consisting of metallic springs are installed which are connected to pins 11. A bottom case 10 having a male thread on its peripheral surface is attached to the bottom 5 of the outer tube. A movable ring 12 having a female thread on its inner surface is attached around the base. The discharge tube and the base are mechanically connected together through the bottom case 10 and the movable ring 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a self-ballasted fluorescent lamp, and particularly to a light-weight and inexpensive toga structure thereof.

B. BACKGROUND OF THE INVENTION FIG. 1 shows a block diagram of a self-ballasted fluorescent lamp, which is the object of the present invention. This lamp is known from Japanese Patent Application Laid-Open No. 54-44370. The lamp consists of a discharge tube part and a base part.

The discharge tube portion consists of an outer tube 1 forming an airtight space and an inner tube 3 located inside the outer tube 1 and having a filament-shaped electrode 2 sealed at one end and open at the other end into the space. A small amount of mercury and a rare gas of several Torr are sealed inside the outer tube 1, and a phosphor 4 is coated on the inside of the inner tube 1.

The discharge tube section generates low-pressure mercury vapor discharge in the same way as a normal fluorescent lamp, and emits light by converting the generated ultraviolet rays into visible light using the phosphor 4. FIG. 1 is an example, and the number and shape of inner tubes and the number of electrodes may vary depending on the lamp.

Basically, the feature is that the outer tube 1 forms a discharge space. The inner surface of the outer tube 1 may be coated with a diffusion film, etc. The base portion is attached to the base 5 of the outer tube 1 and has a screw-in sleeve 6, and a stabilizer 8 inside the base case 7. and starter 9.

A choke coil is usually used for the ballast 8, and a bimetallic glow lamp is often used for the starter 9, but these may also be electronic type including semiconductor circuits.

With the above configuration, this lamp can be used by connecting directly to a light bulb socket, and is characterized by higher efficiency and longer life than incandescent light bulbs. This type of lamp, which is currently on the market, has a discharge tube part and a base part fixed to each other, and both are disposable. However, typically the lifespan of a discharge tube is several thousand hours, and the lifespan of a ballast is about seven years. In other words, even when the discharge tube reaches the end of its life, the ballast is still usable, and it would be a great waste to throw away both of them together.

In order to eliminate this waste, the discharge tube part and the cap part should be made detachable, and this point is mentioned in the previous known example, but no specific method is described. As a specific method for this, a lamp different from the lamp with the structure shown in Fig. 1 is used.
There is a known method. This lamp consists of a straight tube fluorescent lamp bent into a hollow shape, placed in a light bulb-shaped plastic case, and an adapter containing a ballast part that can be attached and detached via a threaded sleeve. However, since the threaded sleeve has a large connecting portion, it is not suitable for miniaturization, and the number of contacts is also limited to two. Another option would be to make a fixture specifically for light bulb-shaped fluorescent lamps, which would have the ballast built into the lighting fixture just like regular fluorescent lamps, but this would not be as versatile.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for attaching and detaching a discharge tube portion and a base portion of a compact fluorescent lamp in a simple manner and suitable for downsizing.

[Summary of the invention]

Miniaturization was made possible by using pins or flat plate electrodes for the electrical connection between the discharge tube and the cap. For mechanical connections, screw-type rings or spring-type fasteners were used to strengthen the connection.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

2 shows the lamp shown in FIG. 1, in which the discharge tube portion and the base portion are detachable, and the electrical connection is made via a metal pin 11. A stabilizer 8 and a starter 9 are housed in the base case 7, and an mf using a metal spring is installed.
f113 is provided and connected to pin 11. The outer tube base 5 has a bottom case 1o with a male thread cut on the outer periphery.
is attached, and a movable ring 12 with a female thread cut on the inner surface is provided on the first cap part, and the 6-pin connection mechanically connected by these two is small and has a contact point, unlike a screw-in sleeve. It is possible to reduce the number of digits to four as shown in FIG. Furthermore, if the discharge tube part and the cap part are attached with screws, they will not come off accidentally and are highly stable.

If an inexpensive bimetallic glow lamp or the like is used as the starter, only the starter 9 may be housed in the discharge tube portion as shown in FIG. In this case, the number of pins 11 can be reduced.

In FIG. 4, a female electrode 13 is provided on the bottom case 10, and a pin 11 is provided on the base.

In this lamp, the discharge tube part reaches the end of its life sooner, so
Only that will be replaced. Therefore, if there is a thin protrusion like a pin on the discharge tube part that is frequently replaced, it will be easily damaged. This point has been improved in Fig. 4. Also,
The starter 9 may be housed in the mouthpiece as shown in FIG.

FIG. 5 shows yet another embodiment in which the electrical connection is made by a flat electrode 14 provided on the bottom case 1o and a test electrode 15 provided on the base case 7. If a flat electrode is used, there will be fewer irregularities compared to a pin, making it easier to downsize and reducing the risk of damaging the electrode. In FIG. 5, the starter 9 may be housed in the base case 7. Further, the shape of the electrode 14 may not be flat but may be hemispherical or the like, and the flat electrode 14 may be provided on the base case 7' and the female electrode 15 may be provided on the bottom case. Also, both may be convex electrodes as long as the connection positions are matched.

In addition, in the embodiments shown in FIGS. 2 to 5, a movable ring 12 with a female thread cut is attached to the bottom case 10, and a male thread is cut to the one-cap case 7. Good too.

FIG. 6(a) shows yet another embodiment, in which a hole is provided in the bottom case 16, and a stopper 17 is provided in the base case 7, which can be fitted into the hole in the bottom case 16 using a spring made of metal or plastic. In this case, the discharge tube part and the cap part are mechanically connected. FIG. 6(b) shows the discharge tube section viewed from below, and the bottom case 16 has two holes. The number of holes and fasteners is not limited to two.

FIG. 7(a) shows yet another embodiment, in which a bottom case 18 provided with a convex portion and a base case 7 provided with a matching concave portion are connected by a stopper 17 using a spring in the same way as in FIG. It is something that connects. FIG. 7(b) is a view of the discharge tube portion of FIG. 7(a) from below. The convex portion and the concave portion are not limited to a cylindrical shape, but may be square.

FIG. 8 shows yet another embodiment, in which the bottom case 19 is provided with a male electrode 20 with a hole or groove, and the base case 7 is provided with an electrode 21 that also serves as a matching stopper to connect the two. By doing so, the discharge tube portion and the base portion are electrically and mechanically connected.

The embodiments shown in FIGS. 6 to 8 have the advantage that they can be connected with one touch. In FIGS. 6 and 7, the stopper 17 may be provided in the discharge tube portion, and a matching hole may be provided in the base portion. Further, in FIG. 8, the male electrode 2o may be provided in the base portion, and the female electrode 21 may be provided in the discharge tube portion. Also the number of electrical contacts.

The shape, position of the starter, etc. may be as described in the explanation of FIGS. 2 to 5.

Furthermore, if the outer tube side of the bottom case shown in FIGS. 2 to 8 is painted white, it will also serve as a light reflecting plate, and the luminous flux of the lamp will increase.

[Brief explanation of drawings]

Figures 1 to 5, Figure 6 (a), Figure 7 (a), and Figure 8 are longitudinal sectional views showing the structure of a compact fluorescent lamp, and Figure 6 (b).
) and FIG. 7(b) are respectively similar to FIG. 6(a) and FIG. 7(a).
) is a plan view of the discharge tube portion of the battery as viewed from below. 1... Outer tube, 2... Filament shaped electrode, 3...
Inner tube, 4... Fluorescent substance, 5... Outer tube base, 6...
Screw-in sleeve, 7... Base case, 8... Stabilizer, 9... Starter, 10, 16.1 [, 19...
Bottom case, 11...pin, 12...movable ring, 1
3.15... Female electrode, 14... Flat electrode, 17
...stop, 20...male electric t3 Figure Stone 4 Figure 2-Figure (phantom)

Claims (1)

[Claims] 1. An outer tube forming an airtight space, at least one inner tube located within the space and having one end sealed and the other end open to the space, and at least one inner tube located within the space. In a compact fluorescent lamp, one of which comprises at least two electrodes arranged at a sealed end within the inner tube, a cap attached to the base of the outer bulb, and a ballast and a starter housed in the cap. A light bulb-shaped fluorescent lamp characterized in that the outer bulb and the base portion are detachable via a convex-concave electrical contact. 2. The self-ballasted fluorescent lamp according to item 1, wherein the uneven electrical contacts are pins, flat electrodes, or hemispherical electrodes, and concave electrodes that match these. 3. The self-ballasted fluorescent lamp according to items 1 and 2, wherein the outer tube and the base portion are mechanically connected by a movable ring having an inner thread. 4. Item 1, wherein the outer tube and the cap portion are mechanically connected by a stopper using a spring made of metal or plastic, and a matching hole or groove.
The bulb-shaped fluorescent lamp according to item 2. 5. The self-ballasted fluorescent lamp according to item 1, wherein the uneven electrical contact also serves as a mechanical connection part between the outer tube and the base. 6. The light bulb shape according to items 1 to 5, wherein the case for attaching the convex or concave electrode to the outer tube is painted on the outer tube side in white or a color close to it. Fluorescent lamp.