JPH0544124B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a discharge lamp lighting fixture, and particularly to a discharge lamp lighting fixture that has an electronic lighting device and is mounted in a mounting hole provided on a mounting surface. It is something.

[Conventional technology]

Conventionally, in discharge lamp lighting equipment that uses a discharge lamp such as a single-cap fluorescent lamp, when arranging lighting electrical parts such as an electronic starter having electronic parts in the lighting equipment body, for example, as shown in Fig. 4. Like recessed downlights.

This embedded downlight is equipped with a socket 2 attached to the inner surface of the top plate 1b of a bottomed, substantially cylindrical lighting device main body 1, a single-cap fluorescent lamp 3 attached to the socket 2, and an electronic lighting device 4. It is.

The electronic lighting device 4 connects the electronic components 5 to the printed circuit board 6.
The locking support 7 is mounted on the lower surface of the top plate 1b of the lighting equipment main body 1 with the surface on which the electronic components are mounted facing the light-transmitting opening of the lighting equipment main body 1.
It is attached via an insulating plate 13.
This electronic lighting device 4 is covered with a protective cover 8 made of aluminum to prevent it from being touched from the opening side of the lighting device body 1 and to block the heat generated by the single-cap fluorescent lamp 3, thereby preventing the electronic parts of the electronic lighting device 4 from being touched. 5
It is ensured that there is no negative impact on the

Then, the lighting fixture body 1 is inserted into a mounting hole drilled in a mounting surface such as a ceiling, and the upper surface of the flange 1a formed at the periphery of the opening of the lighting fixture body 1 is brought into contact with the mounting surface to form the flange 1a. The mounting surface is sandwiched between the mounting bracket and the mounting bracket. A frame 11 is suspended from the lighting device main body 1 by a spring, contacts the mounting surface, and covers the flange portion 1a of the lighting device main body 1, and a reflection plate 12 is placed on this frame 11.

The reflecting plate 12 has an opening at its upper end through which the single-cap fluorescent lamp 3 is inserted, and the inside and outside of the reflecting plate 12 are communicated through this opening.

[Problem to be solved by the invention]

However, in the above configuration, even if the heat generated by the single-cap fluorescent lamp 3 is blocked by the protective cover 8, the temperature of the aluminum protective cover 8 itself rises, and the heat from the protective cover 8 is transferred to the protective cover 8. There were problems such as the possibility of adversely affecting the electronic components 5 facing each other.

Further, as a countermeasure, increasing the volume of the internal space of the protective cover 8 can be considered, but such a countermeasure has the problem of increasing the size of the lighting fixture main body 1.

The present invention has been made in view of the above-mentioned background, and its purpose is to prevent the heat generated from the discharge lamp from adversely affecting the electronic components of the electronic lighting device without significantly increasing the size of the lighting equipment. To provide a discharge lamp lighting device in which a lighting device main body is embedded and installed in an embedding hole provided in a mounting surface.

[Means to solve the problem]

A discharge lamp lighting apparatus according to the present invention has a socket for mounting a discharge lamp in a bottomed container-shaped lighting apparatus main body, and an electronic lighting device in which electronic components are mounted on a printed circuit board is installed in the lighting apparatus main body. , the electronic lighting device is attached to the top surface of the lighting device main body with the surface of the printed circuit board on which the electronic components are mounted facing the opposite side of the light-transmitting opening of the lighting device main body, and a protective cover covering the electronic lighting device is placed around the top surface of the lighting device main body. Attach it to the top of the lighting equipment body so that it is almost in close contact with the lighting equipment body at the part,
A step part with a smaller diameter than the printed circuit board of the electronic lighting device is formed on the protective cover, and the protective cover is brought into contact with the periphery of the printed circuit board at this step part, so that the lighting equipment body and the protective cover are in a state where no heat radiation holes are formed. The main body of the device is embedded into the mounting hole provided on the mounting surface.

[Effect]

According to the present invention, a printed circuit board with higher heat insulation properties than metal is interposed between the discharge lamp and the electronic components, and a protective cover that covers the electronic lighting device is in contact with the periphery of the printed circuit board, so that This prevents heat from being applied to electronic components.

〔Example〕

1 to 3 show one embodiment of the present invention, which will be explained below based on the drawings.

This embodiment is a recessed downlight, and the lighting fixture main body 1 has a bottomed, substantially cylindrical shape with its upper end closed, and has a flange 1a at its lower end, and a socket 2 is attached to the approximate center of the lower surface of the top plate 1b. A single-cap fluorescent lamp 3, which is a discharge lamp, is mounted vertically.

The electronic lighting device 4 has an electronic component 5 mounted on the top surface of a substantially disk-shaped printed circuit board 6, and includes a plurality of locking supports 7 made of insulating resin.
Thus, a gap is provided between the printed circuit board 6 and the top plate 1b, and the electronic component 5 is mounted above the top plate 1b of the lighting device main body 1 facing the opposite side of the light-transmitting opening of the lighting device main body 1.

The protective cover 8, which is approximately in the shape of a flat plate with a flange, has a stepped portion 8 having a slightly larger diameter than the printed circuit board 6 on the periphery of the opening of the bottomed tube, which has a slightly smaller diameter than the printed circuit board 6 of the electronic lighting device 4.
a, and the luminaire main body 1 is located at the tip of the stepped portion 8a.
An outer flange 8b having a slightly larger diameter is provided, and a rising portion 8c is provided at the tip of the outer flange 8b.
This protective cover 8 covers the top plate 1b of the lighting fixture body 1.
The rising portion 8c is placed over the top and is in contact with the side surface of the lighting fixture body 1, and the rising portion 8c
It is attached to the lighting fixture body 1 by a screw 9 which is inserted through and screwed into the side surface of the lighting fixture body 1.
Protective cover 8 attached to the lighting fixture body 1
The stepped portion 8a abuts against the periphery of the printed circuit board 6 of the electronic lighting device 4 and presses down the printed circuit board 6. A terminal block 10 is attached to the upper surface of the protective cover 8 and is wired to the electronic lighting device 4 and the socket 2 so that the single-cap fluorescent lamp 3 can be lit.

A frame 11 is suspended from the lighting fixture body 1 by a spring (not shown) and has its outer peripheral end surface in contact with the mounting surface.
The single-cap fluorescent lamp 3 is inserted into the single-cap fluorescent lamp 3.
A reflecting plate 12 is placed to cover the arc tube portion of the lamp and reflect light downward.

In this discharge lamp lighting equipment, no heat radiation holes are formed in the lighting equipment main body 1 or the protective cover 8.
It is possible to prevent any problems from occurring even if the insulation is constructed by blowing the insulation material when installing the insulation material by embedding it in the embedding hole provided on the mounting surface.

In this discharge lamp lighting fixture, the heat generated by the single-cap fluorescent lamp 3 is first blocked by the top plate 1b of the lighting fixture body 1, and then the heat added via the top plate 1b of the lighting fixture body 1 is used by the protective cover 8. It is shielded by the printed circuit board 6, which conducts heat more easily than metal.
Heat is dissipated by contacting the luminaire a, and the adverse effects of heat on the electronic components 5 can be avoided without increasing the size of the lighting fixture body.

In addition, the discharge lamp does not have to be a single-cap fluorescent lamp,
There may be no reflector.

〔Effect of the invention〕

Since the present invention is constructed as described above, the heat generated in the discharge lamp is blocked by the printed circuit board and is unlikely to be applied to the electronic components, and the protective cover is in contact with the periphery of the printed circuit board to prevent the heat of the printed circuit board from being applied to the protective cover. The negative effects of heat on electronic components can be avoided without increasing the size of the lighting fixture body. The protective cover comes into contact with the periphery of the printed circuit board, which prevents the printed circuit board from being damaged by vibrations and shocks during transportation, and the electronic lighting device is attached to the top of the lighting fixture, making it easy to assemble. .

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a sectional front view, FIG. 2 is an exploded perspective view of main parts, and FIG. 3 is a sectional view of main parts. FIG. 4 is a half-sectional front view showing a conventional example of the present invention. DESCRIPTION OF SYMBOLS 1...Lighting equipment body, 1b...Top plate, 2...Socket, 3...Single-cap fluorescent lamp, 4...Electronic lighting device, 5...Electronic components, 6...Printed circuit board, 8...
...Protective cover, 8a...Step, 11...Frame, 12
……a reflector.

Claims (1)

[Claims] 1. In a discharge lamp lighting fixture in which a socket for mounting a discharge lamp is disposed in a bottomed container-shaped lighting fixture body, and an electronic lighting device in which electronic components are mounted on a printed circuit board is installed in the lighting fixture body, the printed circuit board The electronic lighting device is attached to the upper surface of the top plate of the lighting device with the surface of the board on which the electronic components are mounted facing the opposite side of the light-transmitting opening of the lighting device, and a protective cover covering the electronic lighting device is illuminated around the periphery. It is attached to the upper part of the lighting equipment body so as to be in close contact with the lighting equipment body, and the protective cover is formed with a step portion that is smaller in diameter than the printed circuit board of the electronic lighting device. A discharge lamp lighting device characterized in that the main body and the protective cover are in a state in which no heat radiation holes are formed, and the main body of the lighting device is embedded and installed in an embedding hole provided on a mounting surface.