JPH11306816A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize the emitted light of a double-ring type discharge lamp by arranging an annular outer tube and an annular inner tube, so that inner tube is situated within the plane including the outer tube on the inside of the outer tube, and allowing one-side ends of the outer tube and the inner tube to communicate with each other to form a discharge path. SOLUTION: An equipment body 1 has three lamps 7a, 7b, 7c differing in diameter, a lighting device housing part 2, a lamp part 3 and a connecting part 4 and is fixed to a ceiling. The lamps 7a, 7b, 7c are arranged in a nesting form, where a minor diameter one is arranged in the inside space of a minor diameter one and concentrically arranged within a single plane. According to this, the temperature of the coldest point can be kept at about 40 deg.C, and the emission efficiency as fluorescent lamp can be kept substantially at coldest temperature. The light emitted from each lamp 7a, 7b, 7c to an illuminating surface will not be shielded by the other lamps, and the utilization efficiency of light as illuminating lights can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting apparatus using a so-called double ring discharge lamp.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, an outer tube 11 and an inner tube 12 each formed in an annular shape are formed in the same plane by disposing the inner tube 12 on the inner peripheral side of the outer tube 11. In addition, a fluorescent lamp called a double ring discharge lamp 7 is provided which is arranged on a concentric circle, and has one end of an outer tube 11 and an inner tube 12 communicated with each other via a bridge portion 13 to form one discharge path. (See JP-A-6-203798). A protection member 14 is provided at the other end of the outer tube 11 and the inner tube 12 in the double ring discharge lamp 7, and a connection terminal (not shown) for connecting to the discharge lamp lighting device is provided at the protection member 14. Can be

[0003] Fig. 4 shows a lighting apparatus using a double ring type discharge lamp of this type. This lighting fixture includes two double ring-shaped discharge lamps (hereinafter, abbreviated as lamps) 7a and 7c having different optical path lengths (that is, diameters) 7a and 7c and a discharge lamp lighting device (high-frequency inverter block) 5 as a fixture body 1. Since the discharge lamp lighting device 5 and the small-diameter lamp 7c are arranged in a vertically overlapping manner, the large-diameter lamp 7a and the small-diameter lamp 7c are vertically displaced. Are arranged in a shape. Further, the discharge lamp lighting device 5 and the lamps 7a and 7c
The reflector 8 has a function of controlling the light distribution of the lamps 7a and 7b, and the discharge lamp lighting device 5 uses radiant heat from the lamps 7a and 7c.
Has a heat-shielding and heat-dissipating function so as not to be directly heated. The illustrated example is a lighting fixture that is directly attached to a ceiling surface using a rosette or the like, and a molded part 10 for attachment to the ceiling is provided in a space inside the small-diameter lamp 7c.

[0004]

SUMMARY OF THE INVENTION
Since the two lamps 7a and 7c are arranged vertically displaced, a part of the light radiated downward from the lamp 7a is cut off by the lamp 7c, and the light is radiated downward from the lamps 7a and 7c. There is a problem that the light radiated to the light is not effectively used for illumination.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to illuminate light emitted from each double ring-shaped discharge lamp while using a plurality of double ring-shaped discharge lamps. It is an object of the present invention to provide a lighting device which can be effectively used for the lighting.

[0006]

According to a first aspect of the present invention, an annular outer tube and an annular inner tube are disposed such that the inner tube is located on the inner peripheral side of the outer tube and in a plane including the outer tube. A double-ring discharge lamp in which one end of the outer tube and the inner tube are connected to each other to form one discharge path, and a fixture body for mounting a plurality of double-ring discharge lamps having different optical path lengths from each other. Each of the double ring-shaped discharge lamps is nested in one plane in such a manner that a double ring-shaped discharge lamp with a small optical path length is arranged on the inner peripheral side of the double ring-shaped discharge lamp with a large optical path length. It consists of

[0007] According to a second aspect of the present invention, in the first aspect of the present invention, the fixture body includes a lamp portion for accommodating a double ring type discharge lamp,
The lamp unit is separate from the lighting unit storage unit that stores the discharge lamp lighting device, and the lamp unit and the lighting device storage unit are connected to each other via a connection unit.

According to a third aspect of the present invention, in the second aspect of the present invention, at least a part of the storage space of the double ring type discharge lamp in the lamp part is covered with a lamp shade made of a translucent material. is there.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the lamp shade covers the entire circumference of the double ring discharge lamp.

According to a fifth aspect of the present invention, in the second aspect of the present invention, the storage space for the double annular discharge lamp in the lamp portion is set to be equal to or larger than the tube diameter of the double annular discharge lamp and equal to or smaller than twice the tube diameter. Is what is being done.

According to a sixth aspect of the present invention, in the first aspect of the invention, there is provided an empty space excluding a space for disposing the double ring-shaped discharge lamp in the appliance body, which is disposed in the same plane as the double ring-shaped discharge lamp. An electric light lighting device is provided.

According to a seventh aspect of the present invention, in the invention of the sixth aspect, an outer space of the double annular discharge lamp having the largest optical path length among the double annular discharge lamps attached to the appliance body, and an optical path length is smaller. The discharge lamp lighting device is arranged by using the minimum inner space of the double ring type discharge lamp.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, a part of the components constituting the discharge lamp lighting device, which generates a larger amount of heat than other components, is a double ring type discharge lamp having a maximum optical path length. And the other components are arranged in the inner space of the double ring discharge lamp having the shortest optical path length.

According to a ninth aspect of the present invention, in the invention of the eighth aspect, the projecting height of the discharge lamp lighting device from the fixture body is
It is adapted to the tube diameter of the double ring type discharge lamp.

According to a tenth aspect of the present invention, in the first to ninth aspects of the present invention, the discharge lamp lighting device applies a high frequency voltage to the double ring type discharge lamp when the double ring type discharge lamp is lit at rated operation. It consists of a high frequency inverter circuit.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) In this embodiment, as shown in FIG. 1, three lamps 7a, 7b, and 7c having different diameters are provided in a fixture body 1, and the fixture body 1 is fixed to a ceiling. Lighting device housing portion 2 for housing discharge lamp lighting device 5 and lamp portion 3 for housing lamps 7a, 7b, 7c.
And a connecting part 4 for connecting the lighting device housing part 2 and the lamp part 3
And The lamps 7a, 7b, 7c are arranged on a nest in such a manner that a small-diameter lamp is arranged in an inner space of a large-diameter lamp, and are arranged in one plane. Further, the lamps 7a, 7b, 7c are arranged substantially concentrically. The discharge lamp lighting device 5 includes a lamp 7a,
A high-frequency inverter circuit that applies a high-frequency voltage to 7b and 7c has higher luminous efficiency than when lighting at a commercial power supply frequency.

Here, the lamps 7a, 7b and 7c have a rated power of 41 W and a rated lamp current of 0.430.
A, rated voltage of 96V, rated power of 68W, rated lamp current of 0.430A, rated voltage of 160V, rated power of 97W, rated lamp current of 0.430
A, a lamp having a rated voltage of 229 V is used, and the optical path length of these lamps 7a, 7b, 7c is 1400 to 2500.
mm, and the tube diameter becomes 18 to 29 mm. These lamps 7
By using a, 7b, and 7c and arranging them in one plane, the distance between the lamps 7a, 7b, and 7c is reduced, and the lamps are heated by radiant heat. In other words, the temperature at the coldest point (near the end opposite to the end where the filaments of the outer tube and the inner tube are arranged) can be kept at around 40 ° C., and the luminous efficiency as a fluorescent lamp can be maintained. Can be kept to a maximum. In addition, each lamp 7a, 7
b, 7c are radiated to the irradiation surface by other lamps 7a,
7b and 7c are not interrupted, and the use efficiency of light for illumination is increased.

As described above, the discharge lamp lighting device 5 is housed in the lighting device housing portion 2 provided separately from the lamp portion 3, and is arranged separately from the lamps 7a, 7b, 7c. The discharge lamp lighting device 5 is not heated by the radiant heat from the lamps 7a, 7b, 7c, and the components constituting the discharge lamp lighting device 5 are not heated and deteriorated. That is, the reliability of the discharge lamp lighting device 5 is improved, and the life of the lighting fixture is prolonged.

The lamp unit 3 has a lamp shade 6 formed of a translucent material. In this embodiment, the lamp shade 6 is arranged so as to surround substantially the entire circumference of the lamps 7a, 7b, 7c. That is, light emitted from the lamps 7a, 7b, 7c is emitted in almost all directions, and in addition to direct light, indirect light reflected on a ceiling surface or the like is used for illumination. In addition, the light distribution area can be increased, and the light output of the entire lighting fixture increases.

Since the lamps 7a, 7b, 7c are arranged in one plane, the lamp shade 6
Of the lamps 7a, 7b, 7c can be set to be equal to or less than the tube diameter of the lamps 7a, 7b, 7c. That is, the thickness of the lamp unit 3 can be reduced. Moreover, since the lamps 7a, 7b, 7c are arranged in one plane, replacement of the lamps 7a, 7b, 7c is facilitated. (Embodiment 2) In this embodiment, as shown in FIG. 2, two lamps 7a and 7c are attached to the instrument body 1. In the present embodiment, the lamps 7a, 7
c is not arranged separately from the discharge lamp lighting device 5,
It is located relatively adjacent to the instrument body 1. However,
The discharge lamp lighting device 5 is arranged using a space outside the large-diameter lamp 7a and a space inside the small-diameter lamp 7c. The discharge lamp lighting device 5 is mounted on one circuit board 9, and the components constituting the discharge lamp lighting device 5 are distributed and arranged as described above, so that the internal space of the appliance body 1 is effectively used. Therefore, the mounting area is increased. The height of the discharge lamp lighting device 5 protruding from the appliance body 1 is adjusted to the tube diameter of the lamps 7a and 7c, whereby the vertical dimension of the lamp shade 6 is reduced.
It is possible to make the tube diameter of a or 7c or less than twice the tube diameter, and it is possible to reduce the thickness of the lighting fixture.
The lamps 7a and 7c and the discharge lamp lighting device 5 are separated by a reflector 8.

Here, of the components constituting the discharge lamp lighting device 5, those which generate a large amount of heat and have a remarkable temperature rise are arranged in the outer space of the large-diameter lamp 7a, and the other components are arranged. By arranging in the space inside the small-diameter lamp 7c, it is possible to reduce the temperature rise of each component due to the radiant heat of the lamps 7a and 7c.

The space for disposing the discharge lamp lighting device 5 is limited to the space outside the large-diameter lamp 7a and the small-diameter lamp 7a.
The space between the large-diameter lamp 7a and the small-diameter lamp 7c is not limited to the space inside c, and can be used for mounting components.

[0023]

According to the first aspect of the present invention, an annular outer tube and an annular inner tube are disposed so that the inner tube is located on the inner peripheral side of the outer tube and in a plane including the outer tube. A double annular discharge lamp in which one end of the inner tube communicates with one end to form a single discharge path, and an appliance body for mounting a plurality of double annular discharge lamps having different optical path lengths from each other. Each of the double ring-shaped discharge lamps is arranged in a nested manner in one plane in such a manner that a double ring-shaped discharge lamp having a small optical path length is arranged on the inner peripheral side of a large double ring-shaped discharge lamp, Since a plurality of double ring-shaped discharge lamps are nested in one plane using a plurality of double ring-shaped discharge lamps, a plurality of double ring-shaped discharge lamps are arranged at a relatively short distance, and are heated by mutual radiant heat. Will be. As a result, the coldest point temperature can be maintained at a relatively high temperature, and the state of high luminous efficiency can be maintained. Further, the light emitted for illumination from each double ring-shaped discharge lamp is not blocked by the other double ring-shaped discharge lamps, and the efficiency of using the light for illumination can be increased.

According to a second aspect of the present invention, in the first aspect of the present invention, the fixture main body includes a lamp portion for accommodating a double ring type discharge lamp,
The lighting unit is separate from the lighting unit and includes a lighting device storage unit that stores the discharge lamp lighting device, and the lamp unit and the lighting device storage unit are connected to each other via a connection unit, and a double ring type The discharge lamp and the discharge lamp lighting device can be arranged separately, and the thermal influence on the other of the double ring type discharge lamp and the discharge lamp lighting device can be reduced. In particular, since deterioration can be suppressed by suppressing a rise in temperature of components constituting the discharge lamp lighting device, reliability can be improved and a long life of the discharge lamp lighting device can be expected.

According to a third aspect of the present invention, in the second aspect of the present invention, at least a part of the storage space of the double annular discharge lamp in the lamp portion is covered with a lamp shade made of a translucent material. Yes, light distribution can be controlled by lamp shade.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the lamp shade covers the entire circumference of the double annular discharge lamp, and the light distribution area is increased.

According to a fifth aspect of the present invention, in the second aspect of the present invention, the storage space for the double annular discharge lamp in the lamp portion is set to be equal to or larger than the tube diameter of the double annular discharge lamp and equal to or smaller than twice the tube diameter. By reducing the thickness of the storage space for the double-ring discharge lamp, the thickness of the lighting fixture can be reduced.

According to a sixth aspect of the present invention, in the first aspect of the invention, there is provided an empty space excluding a space for disposing the double ring-shaped discharge lamp in the appliance body, which is disposed in the same plane as the double ring-shaped discharge lamp. An electric lamp lighting device is provided, and by arranging the discharge lamp lighting device and the double ring type discharge lamp in one plane, it is possible to reduce the thickness of the lighting equipment.

According to a seventh aspect of the present invention, in the invention of the sixth aspect, the outer space of the double annular discharge lamp having the largest optical path length among the double annular discharge lamps attached to the fixture body, and the optical path length is smaller. The discharge lamp lighting device is arranged by using a space inside the double ring type discharge lamp which is the minimum,
The mountable area of the discharge lamp lighting device can be widened by effectively utilizing the space in the appliance body.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, of the components constituting the discharge lamp lighting device, a component having a larger calorific value than other components is replaced with a double ring type discharge lamp having a maximum optical path length. And the other parts are arranged in the inner space of the double-ring type discharge lamp having the shortest optical path length, and it is possible to suppress a rise in the temperature of the parts constituting the discharge lamp lighting device. .

According to a ninth aspect of the present invention, in accordance with the eighth aspect of the present invention, the projecting height of the discharge lamp lighting device from the fixture body is
It is adapted to the diameter of the double-ring type discharge lamp and, combined with the arrangement of the double-ring type discharge lamp and the discharge lamp lighting device in one plane, enables thinner lighting equipment. Become.

According to a tenth aspect of the present invention, in the first to ninth aspects of the present invention, the discharge lamp lighting device applies a high frequency voltage to the double ring discharge lamp at the time of rated lighting of the double ring discharge lamp. It is composed of a high-frequency inverter circuit, and has higher luminous efficiency than the case of lighting at a commercial power frequency.

[Brief description of the drawings]

FIG. 1A is a schematic cross-sectional view showing a first embodiment of the present invention, and FIG. 1B is a plan view showing an arrangement state of a double ring discharge lamp in the first embodiment.

FIG. 2 is a schematic sectional view showing Embodiment 2 of the present invention.

FIG. 3 is a plan view showing a double ring type discharge lamp.

FIG. 4 is a schematic sectional view showing a conventional example.

[Description of Signs] 1 Appliance body 2 Lighting device storage unit 3 Lamp unit 4 Connecting unit 5 Discharge lamp lighting device 6 Lamp shade 7, 7a, 7b, 7c Double annular discharge lamp 8 Reflector 9 Circuit board 11 Outer tube 12 Inner tube 13 Bridge

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nagatoshi Toshikazu 1048, Okadoma, Kadoma, Osaka Prefecture, Matsushita Electric Works, Ltd. (72) Inventor Hiroshi Konishi 1048, Okadoma, Oaza, Kadoma, Osaka, Japan Matsushita Electric Works ( 72) Inventor Akihiro Kishimoto 1048 Kadoma, Kadoma, Osaka Pref.Matsushita Electric Works Co., Ltd. (72) Inventor Murayama ▲ Yori ▼ Shin 1048 Kadoma, Kadoma, Kadoma, Osaka Pref.

Claims (10)

[Claims] 1. An annular outer pipe and an annular inner pipe are disposed such that the inner pipe is located on the inner peripheral side of the outer pipe and in a plane including the outer pipe, and one ends of the outer pipe and the inner pipe are connected to each other. And a fixture body for mounting a plurality of double ring-shaped discharge lamps having different optical path lengths, and a double ring-shaped discharge lamp having a large optical path length. A lighting apparatus characterized in that the double ring-shaped discharge lamps having a small optical path length are arranged on the inner peripheral side of the light emitting element, and the double ring-shaped discharge lamps are nested in one plane. 2. The apparatus main body comprises a lamp part for housing a double ring type discharge lamp, and a lighting device housing part which is separate from the lamp part and houses a discharge lamp lighting device. The lighting device according to claim 1, wherein the device housings are connected to each other via a connecting portion. 3. The luminaire according to claim 2, wherein at least a part of a storage space of the double annular discharge lamp in the lamp unit is covered with a lamp shade made of a translucent material. 4. The luminaire according to claim 3, wherein the lamp shade covers the entire circumference of the double annular discharge lamp. 5. The storage space for the double ring-shaped discharge lamp in the lamp part is set to be equal to or larger than the tube diameter of the double ring-shaped discharge lamp and equal to or smaller than twice the tube diameter. Lighting equipment. 6. A discharge lamp lighting device is provided in an empty space of the appliance body excluding a space in which a double ring-shaped discharge lamp is arranged, wherein the discharge lamp lighting device is arranged in the same plane as the double ring-shaped discharge lamp. The lighting fixture according to claim 1. 7. An outer space of a double ring-shaped discharge lamp having a maximum optical path length and a space inside of a double ring-shaped discharge lamp having a minimum optical path length among the double ring-shaped discharge lamps mounted on the apparatus main body. 7. The lighting apparatus according to claim 6, wherein the discharge lamp lighting device is arranged by using the following. 8. A component having a larger calorific value than other components constituting the discharge lamp lighting device is arranged in an outer space of the double ring type discharge lamp having a maximum optical path length, and other components are arranged. The lighting device according to claim 7, wherein the lighting device is arranged in a space inside a double ring-shaped discharge lamp having a minimum optical path length. 9. The discharge lamp lighting device according to claim 6, wherein a protruding height of the discharge lamp lighting device from the fixture main body is adjusted to a tube diameter of the double annular discharge lamp. lighting equipment. 10. The discharge lamp lighting device according to claim 1, wherein the discharge lamp lighting device comprises a high-frequency inverter circuit for applying a high-frequency voltage to the double-ring discharge lamp at the time of rated lighting of the double-ring discharge lamp. 10. The lighting fixture according to any one of 9 above.