JP2865267B2 - Discharge lamp and lighting device using this 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 novel discharge lamp and a lighting system using the same.

[0002]

2. Description of the Related Art Conventionally, in a lighting device provided with a so-called annular discharge lamp, it has been standardized to use a plurality of discharge lamps in combination in order to obtain a required illuminance in a room of, for example, about 4.5 to 10 tatami mats. I was For example, 30W + 30
W, 30W + 32W, 32W + 40W, or in some cases, three discharge lamps (for example, 30W + 32W + 40W) are combined so that the required illuminance can be obtained even in a larger room.

[0003]

The reason for this is that in a lighting device using a mere wire-wound ballast, it is inevitably necessary to thin out the lighting in order to reduce the light. However, even though lighting devices for lighting discharge lamps at high frequencies have become widespread, they are still routinely commercialized using a plurality of so-called annular discharge lamps in the same manner as lighting devices using a simple wound ballast. That is, in a lighting device that performs high-frequency lighting of a plurality of discharge lamps, it is possible to attain a dimming state by dimming all the discharge lamps at once without thinning-out lighting. Such lighting devices are very standard. An object of the present invention is to provide a reasonable discharge lamp that can replace a conventional annular discharge lamp and a lighting device using the lamp.

[0004]

Means for solving the problems are as described in the claims.

[0005]

According to the first and second aspects, the discharge path is made longer as a whole.
It is possible to obtain high W with one discharge lamp
is there. According to the third aspect, the strength of the discharge lamp is practically satisfied.
In minutes.

[0006]

An embodiment of the present invention will be described with reference to the drawings.

FIGS. 1, 2 and 3 are directly related to the claims.
This is an embodiment without the description, but is common to the embodiments described later.
Because there are many, it will be described in advance. FIGS. 1 and 2 include two substantially C-shaped inner tubes 1 and outer tubes 2 having different diameters arranged inside and outside so as to be located on the same plane. And the other end of each of the tubes 1 and 2 is connected to the communication tube 5
Constitute the discharge lamp 6 communicated with. The rated lamp power of the discharge lamp 6 is suitably about 50 to 110 W. FIG. 3A shows a lighting device directly mounted on a ceiling, which uses the discharge lamp 6 and a cover 8 for covering a high-frequency lighting circuit 7 in a central space of the discharge lamp 6. The illumination device covered with 9 is constituted. Then, the cover 8 is attached to the main body 10. FIG. 3B shows a ceiling-suspended lighting device using the discharge lamp 6 and a cover 8 for covering a high-frequency lighting circuit unit 7 in the center space of the discharge lamp 6. The illumination device covered by 11 is constituted. The cover 8 is attached to the main body 10
The cord 13 is pulled out from the cord cover 12 on the upper surface of the main body 10.

More specifically, as shown in FIGS.
The inner tube 1 and the outer tube 2 in the vicinity of the electrodes 3 and 4 are covered with a protective member 14 having a mating structure made of, for example, synthetic resin, and provided with terminals 15 connected to the electrodes 3 and 4, for example, having a mating structure made of synthetic resin. The terminal member 16 is configured to be rotatable to some extent with respect to the protection member 14. In addition, the terminal member 16 is a protective member 1
4 is located in the cutout part. The protective member 14 may have a synthetic resin filling structure. And
It has a substantially double annular discharge lamp shape as a whole. Further, the discharge lamp 6 is provided with a protection member 17 having a mating structure made of, for example, a synthetic resin that covers the inner tube 1 and the outer tube 2 on the opposite side of the electrodes 3 and 4. Note that the protective member 17 may have a synthetic resin filling structure. Also, as shown in FIG.
The socket 18 projects from the terminal 15 of the discharge lamp 6.
Is connected to the socket 18. A spring piece 19 is attached to the lower edge of the socket 18 to prevent the discharge lamp 6 from falling off, and the opposite side (protective member 17) of the discharge lamp 6 is supported by a spring-like holder 20.

Next, FIGS. 4 and 5 show an embodiment of the present invention.
You. FIG. 4 shows two substantially semicircular inner tubes 1 arranged on the same plane so as to form a substantially annular shape as a whole, and a substantially C-shaped outer tube arranged on the same plane outside the inner tube 1. An outer tube 2 is provided, and electrodes 3,
The discharge lamp 6 comprises a communication tube 5 and the other end of the inner tube 1 and the end of the outer tube 2 are connected to each other by a communication tube 5. FIG. 5 shows two substantially semi-circular outer tubes 2 arranged on the same plane so as to form a substantially annular shape as a whole, and a substantially C inside the outer tube 2 arranged on the same plane. An inner tube 1 is formed, and electrodes 3,
The discharge lamp 6 includes a communication tube 5 and the other end of the outer tube 2 and the end of the inner tube 1 are connected to each other by a communication tube 5. Other structures of these discharge lamps 6 are almost the same as those shown in FIGS. The configuration of a lighting device using these discharge lamps 6 is also substantially the same as that shown in FIG.

According to this embodiment, the discharge path can be lengthened as a whole, and a high discharge lamp with a high W can be obtained with one discharge lamp 6, which is reasonable. Then, a lamp having a rated lamp power of about 50 to 110 W which is not available in the conventional annular discharge lamp can be easily obtained.
Thus, the required illuminance in the case of a general room size can be obtained with one discharge lamp 6, which is reasonable. Further, in this discharge lamp 6, the inner tube 1 and the outer tube 2 are arranged inside and outside so as to be located on the same plane, and the thickness (height) of the lamp can be reduced, so that a thin and simple lighting device can be easily obtained. It is also possible. In particular, it is possible to use thin gloves and shades for the lighting device. From another point of view, the degree of freedom in designing gloves and shades (especially height setting) is increased. Next, the terminal member 16
Can be easily attached to and detached from the socket 18 of the lighting device, and in this case, an excessive force is hardly applied to the terminal 15. Further, the strength of the discharge lamp 6 can be sufficiently high for practical use.

[0011]

As described above, according to the present invention, one discharge lamp having a high W (for example, a rated lamp power of 50 to 1).
(Approximately 10 W) can be easily obtained, and it is reasonable to obtain the required illuminance with a single discharge lamp in the case of a general room size. Also, the thickness (height) of the lamp can be reduced,
It is also possible to easily obtain a thin and simple lighting device. In particular, it is possible to use thin gloves and shades for the lighting device. From another point of view, the degree of freedom in designing gloves and shades (especially height setting) is increased. Further, the discharge lamp can be easily attached to and detached from the socket of the lighting device, and in this case, an excessive force is not easily applied to the terminal. Furthermore, there is an effect that the strength of the discharge lamp can be made sufficiently practical.

[Brief description of the drawings]

FIG. 1 is a plan view of a discharge lamp showing an embodiment not directly related to claims .

FIG. 2 is a sectional view of the same.

FIGS. 3A and 3B are cross-sectional views of a lighting device using the same discharge lamp, respectively.

FIG. 4 is a plan view of a discharge lamp showing an embodiment of the present invention .

FIG. 5 is a plan view of a discharge lamp showing another embodiment of the present invention .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner tube 2 Outer tube 3 Electrode 4 Electrode 5 Communication tube 6 Discharge lamp 7 High frequency lighting circuit part 8 Cover 9 Globe 11 Seed 14 Protective member 15 Terminal 16 Terminal member 17 Protective member

Claims (4)

(57) [Claims] 1. Two substantially semi-circular inner tubes arranged on the same plane so as to form a substantially annular shape as a whole, and a substantially C-shaped outer tube arranged on the same plane outside the inner tube. A discharge lamp comprising a tube, having electrodes at one end of the inner tube facing each other, and having the other end of the inner tube and the ends of the outer tube communicated with each other via a communication tube. 2. An outer tube having two substantially semicircular arcs arranged on the same plane so as to form a substantially annular shape as a whole, and a substantially C-shaped inner tube arranged on the same plane inside the outer tube. A discharge lamp comprising a tube, having electrodes at one end of the outer tube facing each other, and having the other end of the outer tube and the ends of the inner tube communicated with each other via a communication tube. 3. The discharge lamp according to claim 1, wherein a protection member for covering the inner tube and the outer tube is provided on a side opposite to the electrode. 4. A discharge lamp according to claim 1, wherein a cover for covering a high-frequency lighting circuit is provided in a central space of the discharge lamp, and the discharge lamp is covered with gloves and shades. Lighting equipment.