JPS63152809A - Recessed type lighting fixture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a recessed lighting fixture suitable for being embedded in a heat-insulated ceiling surface.

(Prior Art) Recently, insulation materials have been installed in ceilings mainly in general houses for the purpose of energy saving (reducing heating and cooling loads) and sound insulation. ``Therefore, it may be necessary to use recessed lighting fixtures on insulated ceiling surfaces.

However, if a regular incandescent light bulb is buried in the ceiling and covered with insulating material, the heat dissipation of the fixture is poor, which not only shortens the life of the fixture, but also causes a fire. There is a risk.

In other words, the temperature of the outside of the construction material and the equipment adjacent to it is 90°C.
If it exceeds 'C, there is a risk that the construction materials will catch fire due to low temperature ignition over time. Also, the temperature of the lamp base is 160℃.
If this value is exceeded, the adhesive that fixes the glass bulb of the lamp to the base will deteriorate before the wire breaks, and problems such as loosening of the bulb may occur.

(Problems to be Solved by the Invention) For this reason, the heat insulating material and the lighting fixture are generally separated when the fixture is installed. However, with this method, the insulation material must be separated from the required area at the location where the appliance is installed, which not only makes installation laborious, but also lacks reliability as there is a risk that the insulation material may come close to the appliance after installation. It's something.

Therefore, in order to prevent the above-mentioned problem from occurring even if the appliance is covered with a heat insulating material, for example,
As shown in @, it has been proposed that the reflector has a double structure consisting of a light distribution control reflector and an outer reflector that reflects radiant heat from the reflector.

This product covers the lamp with a double-layered reflector, which prevents the outside temperature of the device from rising too high. It has to be formed to cover a large outer reflecting plate, and the entire reflecting plate has a double structure, which increases the size of the device and requires a large amount of material for the reflecting plate, which is disadvantageous in that it becomes expensive.

The present invention has been made in consideration of the above-mentioned circumstances, and it is possible to prevent the equipment from increasing in size, and reduce the material i of the reflecting plate to prevent excessive temperature rise in each part of the equipment, especially the outer shell. The purpose is to provide recessed lighting equipment.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a reflector section between a first reflector section covering a lamp and the first reflector section above the first reflector section. It is characterized by comprising a second reflecting plate portion formed with a gap therebetween.

(Function) The heat generated from the lamp when the lamp is lit is the lamp input (W)
Approximately 80% of the energy becomes radiant energy, which causes a rise in the temperature of each part of the appliance. However, since the reflector part is formed into a double structure with a gap in the upper part of the lamp, the reflector part located on the outside is The first reflector reflects the radiant heat from the reflection plate located inside. The air layer between the device and the second reflecting plate portion generates heat, suppressing the temperature rise of each part of the device, especially the outside, and improving safety.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
Figures 1 and 2 show a first embodiment of the invention. Reference numeral 1 denotes a device main body, which is formed into a cylindrical shape having a top plate portion 2 on the upper surface and a light projection opening 3 on the lower surface, and is buried in the ceiling surface. In this embodiment, this instrument main body 1 has upper and lower parts.
It is formed of a cylindrical base part 4 with an open bottom surface and a lid body 5 that covers the top opening of this base part 4 to form the top plate part 2, and is fitted into a mounting hole 6 drilled in the ceiling surface A to attach to the ceiling. It is buried in surface A. Reference numeral 7 denotes a socket, and the socket 7 may be made of porcelain, for example, and formed in a cylindrical shape with a lamp base insertion opening 8 at one end, and a holder (not shown) disposed inside. . This socket 7 is installed in a socket holder 9 provided on the top plate portion 2 with the base insertion opening 8 facing downward, and is disposed within the instrument body 1. The socket holder 9 is formed into an annular shape of aluminum with a recess 10 into which the socket 7 fits in the middle part and a gap B around the periphery, and has an upper edge 11 fixed to the top plate part 2.

The socket 7 is fitted into the recess 10 of the socket holder 9 and is attached with its side surface in contact with the inner wall 12. 13
is a lamp attached to the socket 7, and this lamp 13 can be an incandescent light bulb. Reference numeral 14 denotes a first reflector part, which has an opening 15 on its lower surface facing the light projection opening 3 of the fixture main body 1, and a bowl located above the lamp 13 to cover the lamp 13. It has a cylindrical reflective surface section 18 which is continuous with the bowl-shaped reflective surface section 16 via a stepped section 17, and is disposed within the instrument main body 1. In this embodiment, the first reflecting plate part 14 has a lamp insertion hole 19 on the upper surface and is formed of aluminum as a mirror surface for controlling the light distribution of each reflecting surface part 16.18.
It is mounted on a frame 20 that covers the edge.

Reference numeral 21 denotes a second reflecting plate section, which has a socket insertion hole 22 on the upper surface and an opening on the lower surface, and is formed into a deep dish shape, and is similar to the first reflecting plate section 14. A gap C exists between the upper part of the reflector plate 14 and the first reflector part 14, and the radiant heat from the first reflector part 14 is reflected. Then, the second reflector section 21 engages the lower opening edge 23 with the step section 17 of the first reflector section 140, and
It is possible to install the device in a state where it is placed on the reflector section 14 of

Further, this second reflector portion 21 is arranged so that the opening edge 23 is connected to the lamp 1.
3 and above the tip of the lamp 13 and above the first reflector section 14.

Reference numeral 24 denotes a terminal device, and this terminal device 24 is provided on the outer surface of the top plate portion 2 of the instrument main body 1 so as to be offset laterally.

25 is a heat insulating material arranged on the ceiling surface A, and this heat insulating material 25
is formed into a mat shape of, for example, glass wool, rock wool, urethane foam, etc., and is disposed to cover the device body 1.

Next, the operation of this embodiment will be explained. lamp 13
By lighting up the lamp 13, the heat generated from the lamp 13 causes the temperature of each part of the appliance to rise. Since the second reflection plate part 14.21 is formed with a gap C, the radiant heat from the bowl-shaped reflection surface part 15 of the first reflection plate part 14 located inside is transferred to the second reflection plate part 21. reflected and is insulated by this gap C,
Socket 7 Temperature rise is suppressed and appliance body 1
Temperature rises outside, especially above, are suppressed.

Moreover, since the opening edge 23 of the second reflector part 21 is brought into contact with the first reflector part 14 by engaging with its stepped part 17, the heat in the upper part of the first reflector part 14 is absorbed. First reflector section 14
Since the heat is conducted to the cylindrical reflective surface part 18 and dissipated, a rise in temperature of the outer part of the appliance body 1, which is particularly close to the construction material of the ceiling surface A, is effectively prevented. Safe to use.

It was confirmed that the instrument performance was fully demonstrated.

FIG. 3 shows a second embodiment of the invention. Note that the same parts as those in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

That is, in this second embodiment, a second reflecting plate part 21a for controlling light distribution is disposed on the inner surface of the upper part of the first reflecting plate part 14, with a gap C therebetween. Light distribution is controlled by the cylindrical reflective surface portion 18 of the plate portion 14 and the second reflective plate portion 21a.

In this embodiment, the opening edge 23a of the second reflecting plate part 21a is fixed to the inner surface of the step part 17 of the first reflecting plate part 14 by a fixing means such as spot welding.
It is integrally formed with 4.

In this second embodiment, the first. Second reflector part 1
4 and 218 are integrally formed, handling is easy and construction work on the ceiling surface A can be easily performed.

FIG. 4 shows a third embodiment of the present invention, in which the same parts as in the first embodiment are given the same reference numerals and their explanation will be omitted. In this third embodiment, the second reflector part 21b is formed into a disk shape with an opening on the lower surface and is attached to the socket holder 9, and the edge of the opening is placed close to the top of the first reflector part 14. It was established.

In this third embodiment, since the second reflector part 21b is formed on the top of the first reflector part 14, excessive temperature rise in the cap of the lamp 13 attached to the socket 7 can be effectively prevented. It can be prevented.

Although the present invention has been described with respect to the above embodiments, the present invention is not limited thereto. For example, the socket holder does not have to be formed with a gap. However, by forming the socket with a gap, it is more effective in preventing an excessive temperature rise in each part of the appliance, especially in the socket.

〔Effect of the invention〕

As detailed above, according to the present invention, there is a gap between the first reflector part covering the lamp and the first reflector part above the first reflector part. By forming it with a second reflector part that is provided in parallel with the second reflector part, it is possible to reduce the heat transmitted from the reflector part to the main body of the instrument, and since only the upper part of the reflector part is formed with a double structure, the reflector The device can be made smaller in size compared to a device having a double structure as a whole, and less material is required for the reflector, so it can be provided at a low cost.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, FIG. 1 is a longitudinal cross-sectional view, FIG. 2 is an enlarged longitudinal cross-sectional view of a reflecting plate portion, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a partially cutaway sectional view showing a third embodiment of the present invention. 1... Appliance body, 2... Top plate part. 3... Light emitting aperture, 7... Socket. 9...Socket holder, 13...Lamp. 14...First reflecting plate section. 21.21a, 21b--second reflecting plate section. C... 1st. Gap between the second reflector parts. Patent Applicant Toshiba Electric Materials Corporation Agent Patent Attorney Ono 1) Hiroki Yoshi 1 Figure 2 Figure 3

Claims (1)

[Claims] (1) A cylindrical appliance body with a light projection opening on the bottom surface and buried in the ceiling surface, a socket disposed inside this appliance body, a lamp attached to this socket, and the above-mentioned light projection on the bottom surface. A first reflecting plate part having an opening facing the opening and covering the lamp, and a gap formed between the first reflecting plate part and the first reflecting plate part above the first reflecting plate part. A recessed lighting fixture characterized by comprising: a second reflecting plate portion;