JPS6240489Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a discharge lamp with a double-tube structure housed in an outer bulb and having, for example, a U-shaped inner tube as a discharge path, and connected to a light bulb base via an adapter with a built-in ballast. The present invention relates to a discharge lamp device.

Figure 1 shows a conventional example, in which a discharge space 3 is kept airtight by an outer tube 1 and a stem (button stem) 2.
This is a compact fluorescent lamp that houses two U-shaped inner tubes 4 bent in a U-shape, and the inner surface of the U-shaped inner tubes 4 is coated with a fluorescent substance 5. Further, one end of the U-shaped inner tube 4 is hermetically fixed around the electrode 6 by glass welding, and the other open end 7 is used to cause discharge between the two electrodes 6, 6. 8 is a lighting device section, and 9 is a swan base type cap.

Figures 2a to 2d show the above-mentioned lighting device for the fluorescent lamp, in which the lighting circuit is composed of a four-way internal winding coil 10 as shown in figure a, and the central space is A coupling fitting 11 as shown in FIG. 2B is installed, and the lamp is mechanically fixed by the fitting 11 and electrically connected at the same time, thereby constructing a circuit as shown in FIG. 1C. The specific structure of the lighting device and lamp section is as shown in Figure d.
The tip b of the cap 9 is connected to a spring contact 12 inside the coupling fitting 11 while being insulated from the coupling fitting 11. In addition, the coupling fitting 11 is connected to the chiyoke coil 1.
0 (terminal c in figure d), and a cylindrical coupling body 13 provided at the center of the lamp stem 2 is connected to the coupling fitting 11 by pins e and e provided on the coupling body 13. The lamp part and the lighting device part 8 are combined together. In addition, the starter S is shown in the figure d.
As shown in FIG. FIG. 3 is a perspective view of the appearance of the lamp part, and numeral 15 in the figure indicates a protrusion that is the trace of an exhaust port.

Such conventional discharge lamp devices have the following drawbacks.

(1) Since the exhaust port mark 15 at the tip of the lamp remains as a protrusion, this part is easily damaged.

(2) When the lamp stem 2 is welded to the outer tube 1, it is easy to warp, making it difficult to orient the joining body 13, which should be installed perpendicularly to the stem 2.

(3) It is difficult to position the combined body 13 at the center of the lamp stem 2 because there is no guide.

The present invention was devised in view of these drawbacks, and will be described below based on examples. FIG. 4 is an exploded perspective view of the lamp section, in which an exhaust port is provided perpendicularly to the stem at the center of the stem, and the combined body 13 and the starter S are installed using the protrusion 15 after the exhaust sealing as a guide. be.

Fig. 5 shows a different embodiment, which is equipped with a noise prevention capacitor 18 and a thermal protector 16, and furthermore, in order to reduce the temperature rise of each component, there are many parts in contact with the outside air. There is. In other words, this is a preferred embodiment in that the structure is such that the heat generated from the lamp stem and ballast is not accumulated within the case 19. Electrical wiring except for the lamp and starter is done on the board 24,
Each terminal corresponds to the circuit shown in FIG. terminal c′,
The lead wires coming out from d' are connected to two contacts of the cap 9, respectively. Reference numeral 17 denotes a spring contact piece, which makes contact with the contact piece 22 of the lamp portion to form the entire circuit shown in FIG. Mechanical support of the lamp part is achieved by fitting the coupling part 21 attached to the lamp stem into the engagement hole of the bottom plate 20 of the lighting device part 8 using a pair of hooking claws and rotating it. Reference numerals 22 and 23 are contact pieces, and at the same time, they also have the function of supporting and fixing the starter S. Therefore, in this embodiment, the contact pieces 22, 23 and the starter S are fixed and wired using the protrusion 15 of the exhaust port as a guide, and then the connecting part 21 is fitted, and the part 21 is fixed and the protrusion 15 is fixed. protection. Also, keep the stem, which is a source of heat, away from each component. In other words, a structure in which the distance between the starter S and the stem is increased and a gap is also provided between the lighting device and the stem is more preferable in terms of reducing the temperature rise of each component and easing restrictions on materials, etc.

FIG. 6 is a perspective view of the lamp section of the above embodiment. Regarding the components equivalent to the conventional example,
The same reference numerals are given.

As described above, the present invention uses a double-tube structure discharge lamp that houses an inner tube that forms a discharge path in a discharge space that is kept airtight by an outer tube and a stem, and a lighting device with a built-in ballast. In a discharge lamp device that is connected to a light bulb cap through a part, the protrusion of the exhaust port of the outer bulb is placed in the center of the stem, and the lighting device parts are arranged around the protrusion, so that the stem It has been possible to provide a discharge lamp device in which it is easy to position and orient the parts of the lighting device mounted on the lamp, and in addition, the protrusion of the outer bulb can be protected and the lamp can be prevented from being damaged.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional example, and FIGS. 2 a to 2 d show the same lighting device part in more detail.
1 is a perspective view of a chiyoke coil, b is a perspective view of a coupling fitting, c is a lighting circuit diagram, d is a partial cross-sectional front view of the lamp section and lighting device section, FIG. 3 is an external perspective view of the lamp section, and FIG. 4 5 is an exploded perspective view showing one embodiment of the present invention, and FIGS. 5 a to 5 c show different embodiments.
FIG. 6 is an exploded perspective view of the lighting device section, b is an exploded perspective view of the lamp section, c is a lighting circuit diagram, and FIG. 6 is an external perspective view of the lamp section.

Claims (1)

[Scope of utility model registration request] A discharge lamp with a double tube structure, consisting of an inner tube that forms a discharge path in a discharge space kept airtight by an outer tube and a stem, is connected to a light bulb base via a lighting device with a built-in ballast. In a discharge lamp device formed by connecting
A discharge lamp device characterized in that a protrusion of the exhaust port of the outer bulb is disposed at the center of the stem, and lighting device parts are disposed around the protrusion.