JP2003272436A - Luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a luminaire capable of precluding generation of a steep change in temperature in an amalgam part by an air flow even if the luminaire is furnished with a fluorescent lamp of amalgam type. <P>SOLUTION: The luminaire comprising the fluorescent lamp 1 furnished at its base 1b with an amalgam part 5, a reflecting plate 2 installed surrounding the lamp part 1a of the lamp 1 is equipped with a rate-of-flow reducing means to reduce the rate of flow of the air A flowing around the amalgam part 5 of the fluorescent lamp 1. The rate-of-flow reducing means is formed from a lamp base cover 7 installed in such a condition as approximately blocking the gap between the inner end face of the lamp base 1b and the peripheral edge of a lamp inserting hole 3, an air passage arranged around the lamp base 1b and socket 4, a bent part of the air passage, etc. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture, and more particularly to a structure of a lighting fixture using an amalgam type single-ended die fluorescent lamp.

[0002]

2. Description of the Related Art Some lighting fixtures are constructed by using a single-ended die fluorescent lamp (hereinafter referred to as a fluorescent lamp) capable of reducing power consumption. As shown in FIG. This type of lighting fixture has a fluorescent lamp 1 and a reflector plate 2 surrounding the lamp portion 1a, that is, a tapered shape in which one end surface is substantially closed and the other end surface is opened. It has the reflection plate 2 which has. That is,
A lamp insertion hole 3 for inserting the base portion 1b of the fluorescent lamp 1 is formed on one end surface of the reflection plate 2 which is substantially closed, and the back side of the reflection plate 2 is inserted through the lamp insertion hole 3. The base portion 1b of the fluorescent lamp 1 that protrudes inward is inserted into the socket 4 and connected.

In these fluorescent lamps 1, there are two types having different determinants of the lamp characteristics, one of which is a normal type in which the lamp characteristics are determined by the temperature of the coldest spot. The other one is the amalgam type in which the lamp characteristics are determined by the temperature of the amalgam that is the mercury vapor supply source. Further, the amalgam type fluorescent lamp 1 has characteristics that it maintains optimum characteristics in a wider temperature range and particularly good characteristics in a high temperature range as compared with a normal type fluorescent lamp.

By the way, when the fluorescent lamp 1 is of the amalgam type, as shown in FIG. 17, the amalgam portion 5 as the lamp characteristic determining portion has the base portion 1b.
It is generally provided in. In recent years, there has been a demand for further miniaturization of the fluorescent lamp 1, but in order to realize such miniaturization, the ambient temperature of the lamp during lighting rises and the mercury vapor pressure is reduced. Since it is necessary to prevent the luminous efficiency from becoming too high and the luminous efficiency being deteriorated, the amalgam type fluorescent lamp 1 is more frequently used than the normal type.

[0005]

By the way, in the conventional lighting equipment, the base portion 1b of the fluorescent lamp 1 and the socket 4 are both open, and are exposed to the outside air. Often Therefore, when it is installed in a room where an air conditioning system such as a plenum return is used and forced convection occurs in the lighting equipment, or when it is installed outdoors and the outside airflow blows on the fluorescent lamp 1, the fluorescent lamp The amalgam part 5 provided in the first base part 1b is rapidly cooled and causes a remarkable temperature drop, and as a result of the change in the lamp characteristic, the brightness is significantly decreased.

The present invention has been made in view of the above facts, and an object of the present invention is to provide an amalgam type fluorescent lamp in spite of the fact that the amalgam portion is abruptly changed by the flow of air. Another object of the present invention is to provide a luminaire having a configuration capable of preventing a significant decrease in illuminance and a significant decrease in illuminance.

[0007]

According to a first aspect of the present invention, there is provided a lighting fixture including a fluorescent lamp having an amalgam portion on a base, and a reflector plate surrounding the lamp portion of the fluorescent lamp. In order to achieve the above object, there is provided flow rate reducing means for reducing the flow rate of the air flowing near the amalgam portion of the fluorescent lamp.

The luminaire according to the invention of claim 2 is claim 1
The cap portion of the fluorescent lamp is projected outward from the lamp insertion hole formed in the reflecting plate, and the flow rate reducing means includes the inner end surface of the cap portion and the lamp insertion hole. It is characterized in that it is a mouthpiece cover attached in a state in which it substantially closes the periphery.

The lighting fixture according to the invention of claim 3 is claim 1
What is described, the base portion of the fluorescent lamp protruding from the lamp insertion hole of the reflector is connected to the socket,
An air flow path serving as a flow rate reducing means is provided around the base and the socket.

The lighting equipment according to the invention of claim 4 is claim 3
And a socket cover provided around the base and the socket constitutes an air flow path.

The luminaire according to the invention of claim 5 is claim 3
The air flow passage is characterized by being provided with a reduced flow velocity space having a larger cross-sectional area and a larger capacity than the air inlet and the air outlet.

A lighting fixture according to a sixth aspect of the invention is the fifth aspect.
The socket cover, which is disposed so as to surround the mouthpiece part and the socket and whose outer end face is closed, constitutes a reduced flow velocity space of the air flow path.

A lighting fixture according to a seventh aspect of the present invention is the sixth aspect.
The socket cover, which is provided around the base and the socket and has the outer end face closed, constitutes a deceleration space of the air flow path, and the lamp insertion hole of the reflector plate is an air passage. While being an inlet, an opening of the socket cover formed at a position close to the lamp insertion hole is an air outlet.

The luminaire according to the invention of claim 8 is claim 1
The air flow path is provided around the base part of the fluorescent lamp and the socket to which the fluorescent light lamp is connected, and the bent part of the air flow path is a flow rate reducing means. There is.

A lighting fixture according to a ninth aspect of the invention is the eighth aspect.
The outer peripheral portion of the socket mounting plate to which the socket is attached is inclined toward the outer end portion of the socket cover that is disposed so as to surround the base portion and the socket. It is characterized in that the bent portion of the air flow path is constituted by the end portion and the peripheral portion of the inclined socket mounting plate.

According to a tenth aspect of the present invention, there is provided a lighting fixture according to the first aspect, wherein flow rate reducing means is provided between the base portion of the fluorescent lamp and the peripheral portion of the lamp insertion hole formed in the reflector. It is characterized in that an air constricting section is provided.

According to an eleventh aspect of the present invention, there is provided the luminaire according to the tenth aspect, wherein the gap provided between the outer end surface of the base portion and the peripheral edge portion of the lamp insertion hole is an air contraction portion. Is characterized by.

The luminaire according to the twelfth aspect of the present invention is the luminaire according to the tenth aspect, wherein the peripheral portion of the lamp insertion hole is bent toward the lamp portion of the fluorescent lamp. It is characterized in that an air contraction portion is constituted by the peripheral portion of the lamp insertion hole thus formed.

A lighting fixture according to a thirteenth aspect of the present invention is the lighting fixture according to the first aspect, characterized in that an air flow passage serving as a flow rate reducing means is provided at a position separated from the lamp insertion hole of the reflection plate. I am trying.

An illumination device according to a fourteenth aspect of the present invention is the illumination device according to the thirteenth aspect, in which an opening communicating with the outside is formed at a position separated from the lamp insertion hole of the reflector. Constitutes an air flow path which serves as a flow rate reducing means.

The luminaire according to a fifteenth aspect of the present invention is the luminaire according to the thirteenth or fourteenth aspects, wherein an auxiliary reflector is attached to the outside of the reflector having the opening. It is characterized in that the auxiliary reflector is also formed with an opening that is displaced from the opening of the reflector.

According to a sixteenth aspect of the present invention, there is provided a lighting fixture according to any one of the thirteenth to fifteenth aspects, wherein the periphery of the base portion and the socket of the fluorescent lamp is sealed by a reflection plate. Characterize.

According to a seventeenth aspect of the present invention, there is provided a lighting fixture according to any one of the thirteenth to sixteenth aspects, wherein an end portion of an opening formed at a position separated from the lamp insertion hole of the reflector plate is It is characterized in that it is inclined toward the lamp portion of the fluorescent lamp.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIG. 1 is a sectional view showing an overall structure of a lighting fixture according to Embodiment 1, and FIG. 2 is a perspective view showing a main structure thereof. The luminaire according to the first embodiment is a vertical type, and its basic structure is the same as that of the conventional form. Therefore, in FIGS. 1 and 2, parts and portions that are the same as those in FIG. Is attached.

The vertical lighting fixture according to the first embodiment is shown in FIG.
As shown in FIG. 2, the fluorescent lamp 1 and the reflector plate 2 surrounding the lamp portion 1a, that is, one end surface (upper surface in the figure) is substantially closed, and the other end surface (FIG. And a reflection plate 2 having a tapered shape whose lower surface is open. The fluorescent lamp 1 here is an amalgam type, and an amalgam part 5 is provided in the base part 1b thereof.

A lamp insertion hole 3 is formed on one end surface of the reflection plate 2 so that the base portion 1b of the fluorescent lamp 1 provided with the amalgam portion 5 is projected outward. The base portion 1b of the fluorescent lamp 1 that protrudes from the insertion hole 3 to the back surface side of the reflection plate 2 is inserted into the socket 4 and connected. In addition, the base portion 1 of the fluorescent lamp 1
b, that is, between the inner end surface of the base portion 1b provided with the amalgam portion 5 and the peripheral edge portion of the lamp insertion hole 3 formed on the one end surface of the reflection plate 2, both of them are in close contact with each other, A mouthpiece cover 7 that substantially blocks between these is attached.

Therefore, the flow of air from the inside of the reflection plate 2 through the lamp insertion hole 3 toward the periphery of the base portion 1b of the fluorescent lamp 1 is blocked by the base cover 7 and the amalgam portion. The flow rate of air flowing in the vicinity of 5 is reduced by the cap cover 7. Note that at least the inner surface of the base cover 7 is preferably a mirror surface similar to the inner surface of the reflection plate 2 in order to secure the light reflection efficiency.

That is, in the luminaire having such a structure, the base cover 7 functions as a flow rate reducing means for reducing the flow rate of the air flowing near the amalgam portion 5 of the fluorescent lamp 1. Therefore, in the lighting fixture according to the first embodiment, the flow rate reducing means for reducing the flow rate of the air flowing near the amalgam part 5 of the fluorescent lamp 1 is provided, which is provided in the base part 1b of the fluorescent lamp 1. As a result, the amalgam part 5 thus obtained is not rapidly cooled by the flow of air to cause a remarkable temperature decrease, and as a result, the brightness of the fluorescent lamp 1 does not decrease. (Embodiment 2) FIG. 3 is a sectional view showing the overall structure of a lighting fixture according to Embodiment 2, and FIG. 4 is a plan view thereof. Note that the lighting fixture according to the second embodiment is a horizontal type in which a fluorescent lamp is arranged in parallel with the open surface of the reflector, and in this respect, the structure is different from the vertical lighting fixture according to the first embodiment. Since there is no fundamental difference due to this, parts and portions in FIGS. 3 and 4 that are the same as those in FIGS. 1 and 2 are given the same reference numerals, and detailed description thereof is omitted here. .

Further, in other embodiments including the second embodiment, that is, other embodiments described below, the fluorescent lamp 1 is of the amalgam type regardless of whether the fluorescent lamp 1 is horizontal or vertical. Since the amalgam portion 5 is provided in the mouthpiece portion 1b in the same manner, the illustration of the amalgam portion is omitted.

The horizontal lighting fixture according to the second embodiment is shown in FIG.
As shown in FIG. 4, the fluorescent lamp 1 and the reflection plate 2 arranged so as to surround the lamp portion 1a, that is, one end surface (upper surface in the drawing) is substantially closed and the other end surface (FIG. And a reflection plate 2 having a tapered shape whose lower surface is open. A lamp insertion hole 3 is formed on the side surface of the reflection plate 2 so that the base portion 1b of the fluorescent lamp 1 having the amalgam portion is projected to the outside. The fluorescent lamp protruding from the lamp insertion hole 3 is formed. Base 1b of lamp 1
Are inserted into and connected to the socket 4 attached to the socket attachment plate 8.

At this time, the side surface of the reflection plate 2 is provided with a socket cover 9 surrounding the base 1b of the fluorescent lamp 1 and the socket 4, that is, a cylindrical shape with both ends open. The socket cover 9 it has is attached. Further, at this time, the peripheral edge portion 8a of the socket mounting plate 8 is inclined toward the outer end portion of the socket cover 9, and the inclined peripheral edge portion 8a of the socket mounting plate 8 has a narrow gap. It is opposed to the outer end portion of the socket cover 9 through S1.

In the case of such a structure, the base portion 1b of the fluorescent lamp 1, that is, the base portion 1b provided with the amalgam portion is passed from the inside of the reflection plate 2 through the lamp insertion hole 3.
The flow of the air A toward the surroundings must flow in the socket cover 9 and then in the gap S1.
Therefore, at this time, the air flow path of the air A flowing around the base portion 1b of the fluorescent lamp 1 and the socket 4 is constituted by the socket cover 9, and moreover, the peripheral edge portion 8a of the socket mounting plate 8 and the socket are attached. Since the bent portion of the air flow path is formed by the cover 9 and the air A,
It becomes difficult to flow around b.

That is, in the structure according to the second embodiment,
The bent portion of the air flow path is configured by the peripheral edge portion 8a of the socket mounting plate 8 and the socket cover 9, and the bent portion of the air flow path functions as a flow rate reducing means. Then, since the flow rate reducing means for reducing the flow rate of the air A flowing near the amalgam portion of the fluorescent lamp 1 is provided, the amalgam portion is not cooled rapidly by the air A. Further, the structure is not limited to such a structure, and even if only the base 1b of the fluorescent lamp 1 and the periphery of the socket 4 are surrounded by the socket cover 9, the socket cover 9 becomes an air flow path for restricting the flow of the air A, Since this air flow path functions as a flow rate reducing means, it is difficult for the air A to flow into the periphery of the base portion 1b. (Embodiment 3) FIG. 5 is a sectional view showing the overall structure of a horizontal lighting fixture according to Embodiment 3, and FIG. 6 is a plan view thereof.
FIG. 7 is a cross-sectional view showing the overall structure of the vertical lighting fixture, and FIG. 8 is a perspective view showing the structure of the main part thereof. Since the structure of these lighting fixtures is basically the same as those of the first and second embodiments,
5 to 8, parts and portions that are the same as those in FIGS. 1 to 4 are given the same reference numerals, and detailed description thereof will be omitted.

The horizontal lighting fixture according to the third embodiment is shown in FIG.
Further, as shown in FIG. 6, the fluorescent lamp 1 and the reflector 2 arranged so as to surround the lamp portion 1a thereof are provided. From the lamp insertion hole 3 formed on the side surface of the reflector 2. The base part 1b of the fluorescent lamp 1 protruding to the outside, that is, the base part 1b provided with an amalgam part (not shown).
Is connected to the socket 4. Then, a socket cover 10 whose outer end face is closed is attached to the side surface of the reflection plate 2, and the socket cover 10 having the inner diameter X is
The fluorescent lamp 1 is arranged after surrounding the base portion 1b of the fluorescent lamp 1 and the socket 4.

That is, the socket cover 10 here constitutes an air flow path provided around the base 1b and the socket 4, and depending on the socket cover 10,
The cross-sectional area through which the air A passes is larger than both the lamp insertion hole 3 having the inner diameter Y, which is the air inlet, and the gap S2 between the reflector 2 and the socket cover 9, which is the air outlet. A flow velocity space is constructed. Further, since the socket cover 10 constitutes a reduced flow velocity space of the air flow path, the air A flowing from the inside of the reflection plate 2 through the lamp insertion hole 3 into the periphery of the base portion 1b of the fluorescent lamp 1. After the flow is greatly expanded, the flow is greatly reduced as it passes through the gap S2 between the reflection plate 2 and the socket cover 10.

Therefore, the air A becomes less likely to flow into the reduced flow velocity space of the air flow path composed of the socket cover 10, and the socket cover 10 flows in the vicinity of the base portion 1b of the fluorescent lamp 1 provided with the amalgam portion. It functions as a flow rate reducing means for reducing the flow rate of A. That is, since the flow rate reducing means for reducing the flow rate of the air A flowing near the amalgam portion of the fluorescent lamp 1 is provided, the air A
Does not cause rapid cooling of the amalgam part. It should be noted that even if the periphery of the base portion 1b of the fluorescent lamp 1 and the socket 4 is surrounded by the socket cover 10 whose outer end surface is closed, the air A becomes difficult to flow in, so that the amalgam portion is not cooled rapidly. Disappear.

On the other hand, in the vertical lighting fixture according to the third embodiment, the structure as shown in FIGS. 7 and 8 is adopted. That is, this vertical luminaire includes a fluorescent lamp 1 and a reflector plate 2 that is arranged so as to surround the lamp portion 1a, and a lamp insertion hole formed in one end face of the reflector plate 2. The base portion 1b of the fluorescent lamp 1 protruding from 3 is connected to the socket 4. Then, a socket cover 10 whose outer end surface is closed is attached to one end surface of the reflection plate 2, and the socket cover 10 having an inner diameter X surrounds the base portion 1b of the fluorescent lamp 1 and the socket 4. .

The socket cover 10 here is also the base portion 1b.
And an air flow path around the socket 4, and the socket cover 10 also connects the lamp insertion hole 3 having an inner diameter Y, which is an air inlet, and the reflector 2 and the socket cover 9, which are air outlets. A cross-sectional area through which the air A passes is larger than any of the gaps S2, and a deceleration space having a large capacity is formed. Therefore, the socket cover 10
The air A is less likely to flow into the reduced flow velocity space of the air flow path configured by the socket cover 10, and this socket cover 10 reduces the flow rate of the air A flowing near the base portion 1b of the fluorescent lamp 1 having the amalgam portion. As a result of functioning as the flow rate reducing means, the amalgam portion is not cooled rapidly by the flow of the air A. (Embodiment 4) FIG. 9 is a sectional view showing the overall structure of a horizontal lighting fixture according to Embodiment 4, and FIG. 10 is a sectional view showing the overall structure of a vertical lighting fixture. Regardless of whether it is a horizontal type or a vertical type, the structure of the lighting fixture according to the fourth embodiment is basically the same as that of the first to third embodiments. Therefore, in FIGS. 9 and 10, the same parts and portions as those in FIGS. 1 to 8 are designated by the same reference numerals, and detailed description thereof will be omitted.

The vertical lighting fixture and the horizontal lighting fixture according to the fourth embodiment are, as shown in FIGS. 9 and 10, a fluorescent lamp 1 and a reflector plate 2 surrounding the lamp portion 1a. The base portion 1b of the fluorescent lamp 1 having an amalgam portion (not shown) is connected to the socket 4 through the lamp insertion hole 3 formed in the reflection plate 2. . In this case, the lamp insertion hole 3
The inner diameter Y is set smaller than the outer diameter Z of the mouthpiece 1b, and a narrow gap S3 is formed between them.

A narrow gap S is also provided between the outer end surface of the base portion 1b of the fluorescent lamp 1 and the peripheral portion of the lamp insertion hole 3.
4, a gap S4 having a gap of, for example, about 5 mm is provided. Therefore, from the inside of the reflector 2 to the socket 4
The flow of the air A toward the surroundings of the socket A must pass through the gap S4 and then through the gap S3, and the flow of the air A is reduced in these gaps S3 and S4. It will be difficult to flow into the surrounding area.

That is, these gaps S3, S4 function as air contraction portions, and the presence of such air contraction portions causes the flow of air A in the vicinity of the base portion 1b of the fluorescent lamp 1, That is, convection hardly occurs. Therefore, the gaps S3 and S4, which are the air constriction parts, are
It also functions as a flow rate reducing means for reducing the flow rate of the air, and as a result of providing the flow rate reducing means for reducing the flow rate of the air A flowing in the vicinity of the amalgam portion of the fluorescent lamp 1, the amalgam portion suddenly moves. It does not cool and cause a significant temperature drop. (Embodiment 5) FIG. 11 is a sectional view showing the overall structure of a vertical lighting fixture according to Embodiment 5, and FIG. 12 is a sectional view showing the overall structure of a horizontal lighting fixture. Regardless of whether it is a horizontal type or a vertical type, the structure of the lighting fixture according to the fourth embodiment is basically the same as that of the first to fourth embodiments. Therefore, in FIGS. 11 and 12, the same parts and portions as those in FIGS. 1 to 10 are designated by the same reference numerals, and detailed description thereof will be omitted.

The vertical lighting fixture and the horizontal lighting fixture according to the fifth embodiment are, as shown in FIGS. 11 and 12, a fluorescent lamp 1 and a reflector plate 2 surrounding the lamp portion 1a. And the base portion 1b of the fluorescent lamp 1 protruding outward from the lamp insertion hole 3 formed in the reflection plate 2, that is, the base portion 1b provided with an amalgam portion (not shown) is the socket 4 Are linked to. The peripheral portion of the lamp insertion hole 3 at this time is bent toward the lamp portion 1 a of the fluorescent lamp 1.

Therefore, the flow of the air A from the inside of the reflection plate 2 to the periphery of the base portion 1a and the socket 4 is the peripheral portion of the lamp insertion hole 3, that is, the lamp insertion hole 3 bent inward. The air A collides with the peripheral portion and is returned to the inside of the reflection plate 2, so that the air A is supplied to the base portion 1a and the socket 4.
It becomes difficult to flow into the surrounding area. That is, in the vertical lighting device and the horizontal lighting device according to the fifth embodiment, the peripheral portion of the bent lamp insertion hole 3 functions as an air contracting portion.

Therefore, between the base portion 1b of the fluorescent lamp 1 and the peripheral portion of the lamp insertion hole 3 formed in the reflection plate 2, there is provided an air constricting portion which serves as a flow rate reducing means. Therefore, the flow rate of the air A flowing in the vicinity of the amalgam portion of the fluorescent lamp 1 is reduced by the flow rate reducing means that is the air contracting section. Therefore, the amalgam portion provided in the base portion 1b of the fluorescent lamp 1 will not be rapidly cooled by the flow of the air A. (Sixth Embodiment) FIG. 13 is a sectional view showing the overall structure of a horizontal lighting fixture according to a sixth embodiment, and FIG. 14 is a sectional view showing the overall structure of a horizontal lighting fixture according to a first modification thereof.
FIG. 15 is a sectional view showing the overall structure of a horizontal lighting fixture according to the second modification. Since the structure of the horizontal lighting fixture according to the sixth embodiment is basically the same as that of the second to fifth embodiments, the parts and portions in FIGS. 13 to 15 that are the same as those in FIGS. 2 to 12 are the same. The reference numerals are given and detailed description is omitted here.

The horizontal lighting fixture according to the sixth embodiment is shown in FIG.
As shown by 3, a fluorescent lamp 1 and a reflector 2 arranged so as to surround the lamp portion 1a are provided, and an amalgam portion (not shown) is provided on a side surface of the reflector 2. A lamp insertion hole 3 is formed to allow the base portion 1b of the provided fluorescent lamp 1 to project to the outside. The base portion 1b of the fluorescent lamp 1 which protrudes from the lamp insertion hole 3 to the outside is inserted and connected to the socket 4 attached to the socket attachment plate 8.

An auxiliary reflector 11 is provided outside the reflector 2.
Is attached, and the auxiliary reflection plate 11 is connected to the socket attachment plate 8. Further, at this time, the reflection plate 2
An opening 12 through which air A circulates is formed at one end surface (upper surface in the figure) of the auxiliary plug 11 selected at a position separated from the lamp insertion hole 3 and faces the opening 12 of the auxiliary reflection plate 11. The opening 13 is also formed at the position to be opened. That is, the reflecting plate 2 and the auxiliary reflecting plate 11 of the horizontal lighting apparatus according to the sixth embodiment are formed with openings 12 and 13 facing each other and communicating with the outside.
13 constitutes a main air flow path, that is, an air flow path which acts as a flow rate reducing means for the base portion 1b of the fluorescent lamp 1.

In the case of such a structure, the air A flowing from the inside of the reflector 2 to the outside is formed on the side surface of the reflector 2 and has a small area through which the base portion 1b of the fluorescent lamp 1 is inserted. It will flow not through the lamp insertion hole 3 but through the large-area openings 12 and 13 that form the air flow path that serves as a flow rate reducing means. Therefore, the flow rate reducing means for reducing the flow rate of the air A flowing near the amalgam portion of the fluorescent lamp 1 is provided, and the base portion 1b of the fluorescent lamp 1 protruding from the lamp insertion hole 3, that is, the amalgam. The air A does not flow near the part.

As a result, the amalgam portion will not be rapidly cooled by the flow of the air A. In addition, in the lighting fixture according to the present embodiment,
Although the auxiliary reflection plate 11 having the opening 13 is attached, it goes without saying that such an auxiliary reflection plate 11 may be omitted.

Furthermore, in the horizontal lighting fixture according to the sixth embodiment, the opening 12 of the reflector 2 and the opening 13 of the auxiliary reflector 11 are provided as in the first modification shown in FIG. It is preferable that they are displaced from each other. With such a structure, the light passing through the opening 12 of the reflection plate 2 can be reflected by the auxiliary reflection plate 11 while ensuring the air flow path.

Furthermore, a structure like the second modification shown in FIG. 15, that is, a structure in which the base portion 1b of the fluorescent lamp 1 and the periphery of the socket 4 are sealed by the reflection plate 2 and the socket mounting plate 8 is adopted. It is also possible to do so. That is, if such a structure is adopted, the base portion 1 of the fluorescent lamp 1 passes through the lamp insertion hole 3 from the inside of the reflection plate 2.
This is because it is possible to effectively prevent the air A from flowing into the surroundings of b. (Embodiment 7) FIG. 16 is a sectional view showing the overall structure of a horizontal lighting fixture according to Embodiment 7. The basic structure of the horizontal lighting fixture according to the seventh embodiment is the same as that of the second embodiment.
16, the same parts and portions as those in FIGS. 2 to 15 are designated by the same reference numerals, and detailed description thereof will be omitted.

The horizontal lighting fixture according to the seventh embodiment is also shown in FIG.
As shown by 6, a fluorescent lamp 1 and a reflector 2 arranged so as to surround the lamp portion 1a thereof are provided. Then, a lamp insertion hole 3 is formed on the side surface of the reflection plate 2, and a base portion 1b of the fluorescent lamp 1 protruding from the lamp insertion hole 3 to the outside, that is, an amalgam portion (not shown) is provided. The base portion 1b is connected to the socket 4. Further, an auxiliary reflection plate 11 is attached to the outside of the reflection plate 2, and these reflection plate 2 and auxiliary reflection plate 1 are attached.
1 has openings 12 and 13 facing each other.

Further, at this time, the respective ends of the openings 12 formed in the reflection plate 2 are inclined toward the lamp portion 1a of the fluorescent lamp 1. With such a structure, the flow of the air A is guided by the end portion of the opening portion 12, and the opening portions 12 and 13 formed in the reflection plate 2 and the auxiliary reflection plate 11 come from the inside of the reflection plate 2. It is a main air flow path of the air A flowing to the outside, and this air flow path acts as a flow rate reducing means for the base portion 1b of the fluorescent lamp 1.

That is, as a result of providing the flow rate reducing means for reducing the flow rate of the air A flowing near the amalgam part of the fluorescent lamp 1, the base portion 1b of the fluorescent lamp 1 protruding from the lamp insertion hole 3, that is, The air A does not flow near the amalgam portion, and the amalgam portion is not cooled rapidly by the flow of the air A. Furthermore, the end of each opening 12 has a fluorescent lamp 1.
When the light L emitted from the lamp part 1a of the fluorescent lamp 1 is reflected by these ends when the lamp part 1a is inclined, the light distribution state in the lighting fixture is improved. The advantage is also secured.

[0054]

According to the lighting apparatus of any one of claims 1 to 17, flow rate reducing means for reducing the flow rate of the air flowing near the amalgam part provided in the base part of the fluorescent lamp is provided. As a result, even if forced convection occurs in the lighting equipment or when the outdoor airflow is blown to the fluorescent lamp when it is installed outside the room, the amalgam part causes a sudden temperature drop due to the air flow. As a result, a significant reduction in illuminance can be prevented from occurring.

Further, in the lighting equipment according to any one of claims 3 to 9, since the base portion of the fluorescent lamp provided with the amalgam portion is not exposed to the outside air, the change in the lamp characteristics due to the decrease in the outside air temperature. The advantage that is unlikely to occur is also secured.

Further, in the lighting equipment according to the second, fifteenth and seventeenth aspects, it is possible to obtain an effect that the light distribution state can be improved especially in the case of a horizontal type.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an overall structure of a vertical lighting fixture according to a first embodiment.

FIG. 2 is a perspective view showing a main structure of a vertical lighting fixture according to the first embodiment.

FIG. 3 is a cross-sectional view showing an overall structure of a horizontal lighting fixture according to a second embodiment.

FIG. 4 is a plan view showing an overall structure of a horizontal lighting fixture according to a second embodiment.

FIG. 5 is a sectional view showing an overall structure of a horizontal lighting fixture according to a third embodiment.

FIG. 6 is a plan view showing an overall structure of a horizontal lighting fixture according to a third embodiment.

FIG. 7 is a sectional view showing an overall structure of a vertical lighting fixture according to a third embodiment.

FIG. 8 is a perspective view showing a main structure of a vertical lighting fixture according to a third embodiment.

FIG. 9 is a cross-sectional view showing the overall structure of a horizontal lighting fixture according to a fourth embodiment.

FIG. 10 is a sectional view showing the overall structure of a vertical lighting fixture according to a fourth embodiment.

FIG. 11 is a sectional view showing the overall structure of a vertical lighting fixture according to a fifth embodiment.

FIG. 12 is a cross-sectional view showing an overall structure of a horizontal lighting fixture according to a fifth embodiment.

FIG. 13 is a sectional view showing an overall structure of a horizontal lighting fixture according to a sixth embodiment.

FIG. 14 is a cross-sectional view showing a first modification of the horizontal lighting fixture according to the sixth embodiment.

FIG. 15 is a cross-sectional view showing a second modification of the horizontal lighting fixture according to the sixth embodiment.

FIG. 16 is a sectional view showing an overall structure of a horizontal lighting fixture according to a seventh embodiment.

FIG. 17 is a cross-sectional view showing an overall structure of a conventional lighting fixture.

[Explanation of symbols] 1 fluorescent lamp 1a Lamp part 1b Base part 2 reflector 3 Lamp insertion hole 4 socket 5 Amalgam part 7 Clasp cover 8 socket mounting plate 9 Socket cover 10 Socket cover 11 Auxiliary reflector 12 Opening (reflector) 13 Aperture (auxiliary reflector)

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Claims (17)

[Claims] 1. A luminaire comprising: a fluorescent lamp having an amalgam portion provided on a base thereof; and a reflecting plate arranged so as to surround the lamp portion of the fluorescent lamp. A lighting fixture comprising flow rate reducing means for reducing a flow rate of air flowing near an amalgam part. 2. The base portion of the fluorescent lamp is projected outward from a lamp insertion hole formed in the reflecting plate,
2. The luminaire according to claim 1, wherein the flow rate reducing means is a base cover attached so as to substantially close the space between the inner end surface of the base portion and the peripheral portion of the lamp insertion hole. 3. The base portion of the fluorescent lamp that protrudes from the lamp insertion hole of the reflector is connected to the socket, and an air flow path serving as a flow rate reducing means is provided around the base portion and the socket. The luminaire according to claim 1, wherein: 4. The luminaire according to claim 3, wherein a socket cover provided surrounding the base portion and the socket constitutes an air flow path. 5. The luminaire according to claim 3, wherein the air flow passage is provided with a reduced flow velocity space having a larger cross-sectional area and a larger capacity than the air inlet and the air outlet. 6. The illumination according to claim 5, wherein the socket cover, which is disposed so as to surround the base portion and the socket and whose outer end surface is closed, constitutes a reduced flow velocity space of the air flow path. Equipment. 7. The socket cover, which is disposed so as to surround the base portion and the socket and whose outer end face is closed, constitutes a deceleration space of the air flow path, and the lamp insertion hole of the reflection plate is the air inlet port. On the other hand, the lighting device according to claim 6, wherein the opening of the socket cover formed at a position close to the lamp insertion hole serves as an air outlet. 8. An air flow path is provided around a base of a fluorescent lamp and a socket to which the base is connected, and a bent portion of the air flow path is a flow rate reducing means. The luminaire according to 1. 9. A peripheral edge portion of a socket mounting plate having a socket attached thereto is inclined toward an outer end portion of a socket cover arranged surrounding the base portion and the socket, and an outer end portion of the socket cover. 9. The luminaire according to claim 8, wherein the bent portion of the air flow path is constituted by the inclined peripheral portion of the socket mounting plate. 10. An air constricting portion serving as a flow rate reducing means is provided between the base portion of the fluorescent lamp and the peripheral edge portion of the lamp insertion hole formed in the reflecting plate. The luminaire according to 1. 11. The lighting fixture according to claim 10, wherein the gap provided between the outer end surface of the base portion and the peripheral portion of the lamp insertion hole is an air contraction portion. 12. A peripheral portion of the lamp insertion hole is bent toward the lamp portion of the fluorescent lamp, and an air contraction portion is constituted by the bent peripheral portion of the lamp insertion hole. The lighting fixture according to claim 10, wherein: 13. The luminaire according to claim 1, wherein an air flow path serving as a flow rate reducing means is provided at a position separated from the lamp insertion hole of the reflection plate. 14. An opening communicating with the outside is formed at a position separated from the lamp insertion hole of the reflection plate, and the opening constitutes an air flow passage which serves as a flow rate reducing means. The lighting fixture according to claim 13. 15. An auxiliary reflector is attached to the outside of the reflector having the opening, and the auxiliary reflector is also provided with an opening displaced from the opening of the reflector. 15. The lighting fixture according to claim 13 or claim 14. 16. The luminaire according to claim 13, wherein the base of the fluorescent lamp and the periphery of the socket are sealed by a reflector. 17. The method according to claim 13, wherein an end of an opening formed at a position separated from the lamp insertion hole of the reflection plate is inclined toward the lamp part of the fluorescent lamp. The luminaire according to any one of 16.