JPH0294319A - Recessed lighting fixture - Google Patents

Abstract

PURPOSE:To prevent overrise of the temp. of a terminal table by furnishing a socket holder on the undersurface of a heat shutting member provided inside of a lighting fixture body, and arranging a picking between a lamp and a lamp insert hole in a reflecting body covering the lamp. CONSTITUTION:In the body 1 of a lighting fixture a heat shutting member 42 is installed with gap formed to the top plate, and on the undersurface of this heat shutting member 42, a socket holder 9 is installed to bear a socket. A lamp 16 fitted in this socket 7 is enclosed by a reflecting body 17 with its undersurface having an opening, and a packing 30 is arranged between the lamp and a lamp insert hole in the reflecting body 17. Accordingly this packing 30 prevents temp. rise of the air to be heated by the lamp 16, while the heat shutting member 42 suppresses temp. rise of the fixture, particularly the top plate 2. Thus, the temp. rise of a terminal table 29 is reduced.

Description

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

(Prior Art) In a recessed lighting fixture that is embedded in a ceiling surface and uses, for example, an incandescent light bulb, the temperature inside the fixture body and the outside surface of the fixture body rises significantly due to the heat generated by the lamp. As a result, the adhesive strength between the lamp bulb and the lamp cap may deteriorate, causing the lamp bulb to fall, or construction materials that touch the outside surface of the lamp body may ignite at low temperatures, causing a fire. If the terminal block is installed on the outer surface of the top plate of the device, the insulation of the terminal block itself or the insulation of the electrical connection wire (for example, F cable) may cause sparks, which may cause a fire. There was a problem.

These problems become more pronounced when the insulation is embedded in a ceiling surface that has been insulated by laying or spraying it.

As a method for preventing the above-mentioned abnormal temperature rise, for example, the method disclosed in Japanese Utility Model Application Laid-open No. 136421/1983 has been proposed. This device is provided with a reflector that covers the lamp and controls light distribution, and an outer reflector that reflects the radiant heat from the reflector is disposed to cover the reflector.

Further, each of the reflecting plate and the outer reflecting plate is provided with a through hole through which the neck portion of the lamp bulb and the socket can be inserted, and the peripheral edge of the through hole is opposed to the outer surface of the socket.

(Problems to be Solved by the Invention) However, in the lighting fixture shown in the above-mentioned Japanese Utility Model Application No. 60-136421, a gap is formed between the periphery of the through hole of each reflecting plate and the outer surface of the socket. There was a problem in that air heated by the heat from the lamp rose through the socket, raising the temperature of the upper part of the socket and the upper part of the appliance body. In particular, the temperature of the terminal block provided on the outer surface of the top plate of the appliance body increases significantly, and the temperature of the terminal fitting of the terminal block may exceed a specified value.

By the way, in technical document 121 "Recessed lighting fixtures" of the Japan Lighting Industry Association, it is stated that
o, the part up to the height) temperature below 90℃, same technical document 1
09 "screwless terminal" specifies that the temperature of the metal contact piece of the terminal block be 90°C or less, and JIS C8140 stipulates that the lamp base temperature be 160°C or less.

The present invention has been made in consideration of the above-mentioned circumstances, and it is an object of the present invention to provide a recessed lighting fixture that satisfactorily prevents excessive temperature rise of the terminal block provided on the outer surface of each part of the fixture, especially the top plate. .

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a terminal block on the outer surface of the top plate portion of the device body, in which a gap is formed between the device body and the top plate portion. A heat shield is provided, a socket holder for supporting the socket is provided on the lower surface of the heat shield, and a reflector having a lamp insertion hole on the upper surface and an opening on the lower surface covers the lamp mounted in the socket. , and a packing is provided between the lamp insertion hole of the reflector and the lamp.

(Function) Since the recessed lighting fixture of the present invention has packing provided between the lamp insertion hole of the reflector and between the lamps, it is possible to extremely prevent air heated by the lamp from rising. Furthermore, since a chopstick or a heating element is provided between the top plate and the reflector, it is possible to suppress the temperature rise outside the appliance, especially in the top plate. As a result, it was possible to reduce the temperature rise of the terminal block, and to keep the temperature of the metal contact piece below the standard value of 90'C.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1
is a device main body, and this device main body 1 has a top plate portion 2 on the top surface, a light projection opening 3 on the bottom surface, and is formed in a cylindrical shape, and has a ceiling surface A.
will be buried in In this embodiment, the device main body 1 is formed of a cylindrical base portion 4 with open top and bottom surfaces, and a lid body 5 that covers the top opening of the base portion 4 to form the top plate portion 2.
It is embedded in the ceiling A by fitting into a mounting hole 6 drilled in the ceiling surface A. Reference numeral 7 denotes a socket, which is made of, for example, porcelain and is formed into a cylindrical shape with a lamp base insertion opening 8 at one end, and a holder (not shown) can be disposed inside. 9 is a socket holder, and this socket holder 9
is a top wall 10, an annular inner wall 12 that forms a concave portion 11 with an opening on the lower surface continuous to the top wall 10, this inner wall 12,
There is a gap 1 between the outside of this inner wall 12 and this inner wall 12.
3, an annular outer wall 14 formed by the outer wall 1
4 and the inner wall 12, and a plurality of mounting pieces 40, in this embodiment, three mounting pieces 40 are provided on the lower surface wall 15 of the inner wall 12 and on the upper surface opening end periphery of the outer wall 14, projecting upward from the opening edge and extending laterally. It is made of aluminum, including the mounting part 41. In this embodiment, the lower wall 15 is formed with an inwardly inclined surface. Reference numeral 42 denotes a heating element provided with a gap formed between it and the top plate part 2, and the heating element 42 has a notch 43 on its periphery that fits into the mounting part 41 of the socket holder 9, for example. They are formed into a plate shape from a galvanized steel plate, and are attached to the top wall 10 of the socket holder 9 in a plurality, for example, two pieces, with spacers 44 keeping a gap between them in the upward and downward directions. Then, attach the socket holder 9 to the spacer 4
By attaching the heating element 42 to the top plate part 2 through the attachment part 41 with the attachment part 5, the heat exchanger 42 is disposed within the appliance main body 1 with a gap formed between it and the top plate part 2. Then, the socket 7 is fitted into the recess 11 with the base insertion opening 8 facing downward, and the socket 7 is inserted into the top wall 10.
is fixed to and supported by the socket holder 9. 16
is a lamp attached to the socket 7, and this lamp 16 can be an incandescent light bulb. 17 is a reflector; this reflector 17
An internal reflector 18 is provided on the top side of the device to form a double layer, and an air layer is formed between the device and the external reflector 19 to prevent heat conduction, thereby suppressing the rise in temperature inside the device. The internal reflector 18 has an opening facing the light projection opening on the lower surface, and a bent part 20 is formed at the end of the opening, and the external reflector 19 has a stepped part 21 that overlaps the bent part 20 in the middle part. The internal reflecting plate 18 is fixed to the external reflecting plate 19 by forming a bent portion and fixing the bent portion to the stepped portion by means such as spot welding. Reference numeral 23 denotes a frame provided in the opening 2 of the main body 1, which is not shown, but is a well-known
It is attached by engaging the engaging portion 24 of the main body 1 with an engaging means such as a spring. The reflector 17 is connected to the frame 23
The opening end is locked to an engaging step provided in the opening end. Lamp insertion holes 22 are provided on the top surfaces of the external and internal reflectors 19 and 20.
have. 30 is packing, this packing 3
0 is disposed between the lamp insertion hole 22 of the reflector 17 and the lamp 16. This packing 30 is made of silicone rubber, for example, and is arranged so as to close the gap between the lamp insertion hole 22 of the reflector and the lamp 16. 29 is a terminal block, and this terminal block 29 is provided on the outer surface of the top plate portion of the main body of the device. This terminal block 29 is provided on a mounting base 40 with a gap formed between it and the top plate, and is covered with a cover 41 made of silicone rubber, for example. Reference numeral 30 denotes a heat insulating material disposed on the ceiling A. This insulating material 30 is formed into a mat shape of, for example, glass wool, rock wool, urethane foam, etc., and is disposed to cover the appliance body 1.

Next, the operation of this embodiment will be explained. lamp 16
When the lamp 16 is turned on, the heat generated from the lamp 16 causes the temperature of each part of the appliance to rise.
, the air heated by the lamp 16 is prevented from rising as much as possible. Moreover, since a heat shield is formed between the top plate and the reflector, it is possible to suppress excessive temperature rises outside the appliance, especially at the top plate, and to prevent temperature rises at the terminal block installed on the top plate. The temperature of the internal metal contact piece could be kept below the standard value of 90°C.

Although the present invention has been described with respect to the above embodiments, the present invention is not limited thereto. For example, the reflector may be a single layer. Alternatively, the heating element may be provided directly on the top plate. Furthermore, the socket holder does not need to have a double structure as long as there is a socket mounting section.

[Effects of the Invention] As detailed above, the present invention provides a device in which a terminal block is provided on the outer surface of the top plate portion of an appliance body, a breaker is provided in the appliance body, and a socket is provided on the lower surface side of the heating element. a socket holder for supporting the lamp, roughly covering the lamp with a reflector having a lamp insertion hole on the top surface and an opening on the bottom surface, and
Packing is placed between the lamp insertion hole of the reflector and between the lamps, so the packing suppresses the rise of air heated by the lamp, and the heat shield prevents excessive temperature rise on the outside of the appliance, especially the top plate. Therefore, excessive temperature rise of the terminal block can be effectively prevented.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view, FIG. 2 is a perspective view showing a socket holder and a heat exchanger, and FIG.
The figure is a sectional view of the terminal block and an enlarged sectional view of the main part of FIG. 4. 1...The main body of the instrument. 2...Light projection aperture. 7...Socket 17...Reflector. 29...Terminal block 2...Top plate part 9...Socket holder 16...Lamp 30...Packing (including changes to content)

Claims (1)

[Claims] (1) A gap is formed between a cylindrical appliance body having a top plate portion on the upper surface and a light emitting opening on the lower surface and buried in the ceiling surface, and the above-mentioned top plate portion within this appliance body. A socket holder provided on the bottom side of the heat shield, a socket provided on the socket holder, a lamp attached to the socket, a lamp insertion hole on the top surface, and a lamp insertion hole on the bottom surface. a reflector having an opening facing the light projection opening and covering the lamp; a packing provided in the lamp insertion hole of the reflector and between the lamps; and a packing provided on the outer surface of the top plate of the appliance body. A recessed lighting fixture characterized by being equipped with a terminal block.