JP2003303510A - Illumination device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that heat generated by one lighting device may cause other lighting devices to be heated when a plurality of lighting devices are housed in a main body case attached to an upper part of a reflection shade. <P>SOLUTION: A main body case 2 which is attached to the upper part of the reflection shade and has heat radiation hole 8 formed on an outer circumference is provided to house a cylindrical lighting device fixing member 16 with a plurality of lighting devices 17 attached to the outer circumference with an approximately equal spacing inside the main body case 2. Heat generated from one lighting device 17 housed in the main body case 2 is avoided by the lighting device fixing member 16 from affecting other lighting devices, and heat generated from each lighting device 17 is facilitated to be radiated through the heat radiation hole 8 located near the lighting device 7 to outside the main body case 2. <P>COPYRIGHT: (C)2004,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 mounted on a ceiling surface or the like by a hanging method.

[0002]

2. Description of the Related Art Heretofore, there has been known a luminaire which has a main body case containing a lighting device and the like, and a reflective shade which is connected to a lower side of the main body case and stores a lamp, and which is mounted on a ceiling surface by a hanging method. Has been. Some of these large luminaires have a plurality of lamps inside the reflective shade.

When a plurality of lamps are provided in the reflective shade, as many lighting devices as the number of the lamps are housed in the main body case.

A partition wall is provided between the lower part of the main body case and the upper part of the reflective shade. This partition wall
It functions as a mounting part for the lamp socket or to improve the reflection performance of the reflection shade.

[0005]

In a lighting fixture in which a plurality of lighting devices are housed in the main body case, the heat generated from a certain lighting device heats another lighting device, which results in durability of the lighting device. It is one of the causes of deterioration of sex.

Further, the heat generated from the lamp housed in the reflective shade tends to stay in the reflective shade, which is one of the causes of deterioration in durability of the lamp and socket.

An object of the present invention is to heat another lighting device by heat generated from a certain lighting device when a plurality of lighting devices are housed in a main body case attached to the upper part of the reflection shade. Is to prevent.

Another object of the present invention is to smoothly dissipate the heat generated from the lamp housed in the reflective shade without staying in the reflective shade.

[0009]

According to a first aspect of the present invention, there is provided a lighting fixture comprising: a bowl-shaped reflective shade having an opening formed in a lower portion thereof; A main body case; a cylindrical lighting device fixing member, in which a plurality of lighting devices are attached to the outer peripheral portion at substantially equal intervals and housed in the main body case; a plurality of sockets connected to the lighting device; A plurality of lamps attached to the socket and disposed inside the reflective shade.

Here, the shape of the tubular lighting device fixing member may be either a cylindrical shape or a rectangular tube shape, and when there are four lighting devices accommodated in the main body case, the lighting device fixing member is provided. When the number of the lighting devices is three, and the number of the lighting devices accommodated in the main body case is three, it is preferable that the lighting device fixing member has a triangular shape. Attaching a plurality of lighting devices to the outer peripheral surface of such a tubular lighting device fixing member,
By housing the lighting device fixing member in the main body case, each lighting device is arranged so that the distance between the lighting devices is maximized within a possible range, and heat generated from a certain lighting device is generated. Radiation lessens other lighting devices. Further, by using the lighting device fixing member, it is possible to prevent heat generated from a certain lighting device from reaching another lighting device by convection or reflection.

Therefore, it is less likely that the heat generated from a certain lighting device housed in the main body case will heat other lighting devices, and the heat generated from each lighting device is near the lighting device. Dissipation of heat to the outside of the main body case is promoted from the heat dissipation hole located at. This prevents each lighting device from being deteriorated in durability due to the influence of heat generated from another lighting device.

According to a second aspect of the present invention, in the luminaire according to the first aspect, a partition for partitioning a space in the reflection shade where the lamp is arranged and a space in the main body case where the lighting device is arranged. A wall is provided, a communication hole that connects the space in which the lamp is arranged and the cylindrical space of the lighting device fixing member is formed in the partition wall, and a second heat dissipation hole is formed in the upper portion of the main body case. There is.

Here, the partition wall may be formed as a bottom plate of the main body case, or may be formed as a top plate of the reflection shade, and functions as a mounting portion of the lamp socket or a reflection wall. Anything can be used as long as it has a function of improving the reflection performance of the shade. Further, the number of partition walls is not limited to one, and two or more partition walls may exist. Further, the partition wall may be formed by using a material having a low thermal conductivity such as stainless steel. In that case, a space where the lamp is arranged and a space where the lighting device is arranged in the main body case are formed. It is possible to reduce the influence of mutual heat.

Therefore, the heat generated from the lamp disposed inside the reflection shade enters the tubular space of the lighting device fixing member in the main body case through the communication hole, and passes through the tubular space to the main body. Heat is dissipated to the outside of the main body case from the second heat dissipation hole formed in the upper part of the case. Thereby, the heat generated from the lamp is smoothly dissipated. Moreover, the lighting device is hardly heated by the heat generated from the lamp.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a lighting fixture, FIG.
FIG. 3 is a vertical cross-sectional view showing an enlarged part of FIG. 3 and FIG.

The lighting equipment of this embodiment comprises a reflective shade 1, a main body case 2, and a plurality of lamps 3.

The reflection shade 1 is formed in a bowl shape having an opening 4 at the bottom, and the inner peripheral surface thereof is painted in a white color suitable for reflecting light.

The main body case 2 is a case member connected to the upper portion of the reflective shade 1, and the first lower portion of the main body case 2 is provided with a first member.
First bottom surface part 5 which is a partition wall and second partition wall which is a second partition wall
A bottom portion 6 is provided, and a suspending member 7 for suspending the main body case 2 on a ceiling surface or the like is attached to the upper portion of the main body case 2. A large number of laterally elongated slit-shaped heat dissipation holes 8 are formed on the side surface of the main body case 2, and a second slit is formed on the upper surface of the main body case 2.
A heat dissipation hole 9 is formed. Four sockets 10 projecting downward are attached to the second bottom surface portion 6.

A reflective shade fixing metal fitting 11 which is a third partition wall is attached to the second bottom surface portion 6. The reflection shade fixing fitting 11 is attached to the second bottom surface portion 6 by screwing a nut 13 onto a screw 12. When the reflection shade fixing bracket 11 is attached to the second bottom surface portion 6, the upper edge of the reflection shade 1 is sandwiched between the outer peripheral edge of the reflection shade fixing bracket 11 and the bottom peripheral edge of the body case 2. Thus, the reflection shade 1 is connected to the main body case 2.

A hole having a diameter larger than the outer dimension of the socket 10 through which the socket 10 is penetrated when the reflective shade fixing metal fitting 11 is attached to the second bottom surface portion 6 is formed in the reflective shade fixing metal fitting 11. The hole serves as a communication hole 14 that connects the lower side of the reflective shade fixing bracket 11 (the space in the reflective shade 1 where the lamp 3 is arranged) and the upper side.
Further, the second bottom surface portion 6 is formed with a communication hole 15 that communicates the lower side and the upper side of the second bottom surface portion 6.

On the upper surface side of the first bottom surface portion 5 of the main body case 2, there is fixed a lighting device fixing metal fitting 16 in the form of a square cylinder which is a lighting device fixing member. This lighting device fixing bracket 16 is formed with four fixing surface portions 16a outwardly, and a lighting device 17 for controlling the lighting of the lamp 3 is fixed to each fixing surface portion 16a. On the inner peripheral side of the lighting device fixing bracket 16,
A cylindrical space 16b is formed.

In the first bottom surface portion 5 of the main body case 2, the cylindrical space 16b above the first bottom surface portion 5 and the first bottom surface portion 5 are provided.
A communication hole 18 that communicates with the lower side is formed.

In such a structure, when the lighting equipment is hung on a ceiling surface or the like to be lit, the main body case 2
Inside, heat is generated from each lighting device 17. Since each lighting device 17 is fixed to each fixing surface portion 16a of the lighting device fixing bracket 16 in the shape of a rectangular tube, each lighting device 17 is arranged so that the distance between the lighting devices 17 is maximized within a possible range. In particular, the interval between the lighting devices 17 in the back-to-back state becomes large. This allows
The heat generated from one lighting device 17 is less likely to reach another lighting device 17 by radiation. Further, the presence of the lighting device fixing bracket 16 prevents heat generated from a certain lighting device 17 from reaching the other lighting device 17 due to convection or reflection. Then, the heat generated from each lighting device 17 is radiated to the outside of the main body case 2 through the heat dissipation hole 8 near the lighting device 17. Thereby, each lighting device 17
Is prevented from being deteriorated in durability due to the influence of heat generated from the other lighting device 17.

When this lighting equipment is turned on, heat is also generated from each lamp 3. The heat generated from the lamp 3 is transmitted through the communication holes 14, 15, 18 as shown by the arrows in FIG.
Through the cylindrical space 16b of the lighting device fixing bracket 16 and rise in the cylindrical space 16b to raise the main body case 2
Heat is dissipated to the outside of the main body case 2 through the second heat dissipation hole 9 formed in. Here, the communication holes 14, 15, 18 and the cylindrical space 16
Since b and the second heat radiating hole 9 are arranged in the vertical direction, the air warmed by the heat from the lamp 3 communicates with these communicating holes 14, 15, 18 and the cylindrical space 16b and the second heat radiating hole 9b. And the heat generated from the lamp 3 can be smoothly dissipated. Therefore, it is possible to prevent deterioration in durability of the lamp 3, the socket 10, etc., which occurs when the heat generated from the lamp 3 stays in the reflection shade 1. The heat generated from the lamp 3 is applied to the lighting device 17
The heat is radiated to the outside of the main body case 2 without heating.

[0025]

According to the lighting apparatus of the first aspect of the present invention, it is less likely that the other lighting device is heated by the heat generated from a certain lighting device housed in the main body case. Since the heat generated from each lighting device is promoted to be dissipated to the outside of the main body case from the heat dissipation hole located near the lighting device, each lighting device is affected by the heat generated from other lighting devices. It is possible to prevent the durability from decreasing.

According to the invention described in claim 2, in the luminaire according to claim 1, a space in which the lamp is arranged in the reflection shade and a space in which the lighting device is arranged in the main body case are provided. A partition wall is provided, and a communication hole that connects the space in which the lamp is arranged and the cylindrical space of the lighting device fixing member is formed in the partition wall, and the second heat dissipation hole is formed in the upper portion of the main body case. Therefore, the heat generated from the lamp arranged inside the reflective shade enters the tubular space of the lighting device fixing member in the main body case through the communication hole, and passes through the tubular space to the main body. The second heat radiation hole formed in the upper part of the case radiates heat to the outside of the main body case, so that the heat generated from the lamp can be smoothly radiated, and the heat generated from the lamp stays in the reflection shade. To be able to prevent a reduction in durability such as a lamp or a socket generated, further, it is possible to prevent the heat of the lighting device due to the heat generated by the lamp.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a lighting fixture according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a part thereof.

FIG. 3 is a horizontal cross-sectional view showing an arrangement state of a lighting device in a main body case.

[Explanation of symbols]

1: Reflective shade, 2: Main body case, 3: Lamp, 4: Opening, 5: Partition wall, 6: Partition wall, 8: Heat dissipation hole, 9: Second heat dissipation hole, 10: Socket, 11: Partition wall, 14 : Communication hole,
15: Communication hole, 16: Lighting device fixing member, 16b: Cylindrical space, 17: Lighting device, 18: Communication hole

Claims (2)

[Claims] 1. A bowl-shaped reflective shade having an opening formed in a lower portion; a body case attached to an upper portion of the reflective shade and having a heat dissipation hole formed in an outer peripheral portion; A tubular lighting device fixing member to which a lighting device is attached and housed in the main body case; a plurality of sockets connected to the lighting device;
A plurality of lamps arranged inside the reflective shade. 2. A partition wall is provided to partition a space in the reflection shade where the lamp is arranged and a space in the main body case where the lighting device is arranged, and the lamp is arranged on the partition wall. The lighting fixture according to claim 1, wherein a communication hole that communicates the space with the cylindrical space of the lighting device fixing member is formed, and a second heat dissipation hole is formed in an upper portion of the main body case.