JPH1021731A - Ceiling recessed luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a shade so as to avoid abnormal temperature rise of a luminaire main body in a ceiling in which heat insulation is executed. SOLUTION: An opening part 13 is formed and buried in a ceiling 10 in which heat insulation is executed to the upper surface, the lower surface of a lamp 20 is made flush with a ceiling surface 22 or projected to the lower part than the ceiling surface 22, and air flow ports 27, 28 are formed between the lower surface of the shade 19 covering the lower surface of the lamp 20 and the ceiling surface 22 of the shade 19. A decoration frame 21 may be installed on the ceiling surface 22 in the surrounding of the opening part 13, and in this case the lower surface of the lamp 20 is made almost flush with the lower surface of the decoration frame 21 or projected to the lower part than the lower surface of the decoration frame 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-mounted lighting device to be embedded in a thermally insulated ceiling.

[0002]

2. Description of the Related Art Conventionally, there is a ceiling-mounted lighting fixture in which a lighting fixture such as a spotlight is buried in a heat-insulated ceiling. The lower surface of the lamp is buried above the ceiling surface to prevent glare. In addition, there has been proposed a highly attractive lighting device in which a lower surface of a lamp of a ceiling-mounted lighting device is covered with a shade, and diffused light transmitted through the shade goes around the ceiling surface.

[0003]

However, in conventional ceiling-mounted lighting fixtures, when the ceiling is insulated, the lower surface of the lamp cannot be covered with a shade. That is, if the lighting fixture is further covered with a shade after being insulated, there is a problem that heat is stored and the fixture body becomes hot. In particular, the power supply line connection terminal, which is a VA branch point, reaches a high temperature of 60 ° C., which may damage the insulating coating of the power supply line. In addition, there is also a problem that the ceiling cloth is discolored by heat and the appearance is deteriorated.

[0004] It is an object of the present invention to provide a ceiling-mounted luminaire in which a shade can be mounted on an insulated ceiling while avoiding an abnormal rise in the temperature of the luminaire body.

[0005]

According to a first aspect of the present invention, there is provided a ceiling-mounted lighting device in which an opening is formed in a ceiling whose upper surface is insulated and the lamp is substantially flush with the ceiling surface. It is characterized in that the air flow openings are formed below the lower surface of the shade covering the lower surface of the lamp, and between the shade and the ceiling surface.

According to the ceiling-embedded lighting device of the first aspect, the lower surface of the shade covering the lower surface of the lamp and the air flow opening between the shade and the ceiling surface are respectively formed. Air is sucked into the interior and exhausted from between the ceiling and the ceiling at the top of the shade. In this air circulation process, the heat of the lamp protruding substantially flush with or below the ceiling surface is taken away, and an abnormal rise in the temperature of the appliance body can be prevented. In addition, since the lower surface of the lamp is covered with the shade, the diffused light transmitted through the shade hits the ceiling surface, and the whole becomes bright.

According to a second aspect of the present invention, there is provided a ceiling-mounted lighting device according to the first aspect, wherein the lower surface of the lamp projects substantially flush with or below the lower surface of the decorative frame provided on the ceiling surface around the opening. It was made. According to the ceiling-mounted lighting device of the second aspect, in addition to the effect of the first aspect, by projecting the lower surface of the lamp substantially flush with or below the lower surface of the decorative frame,
The lamp is located further down, and the amount of protrusion from the ceiling surface increases. As a result, more heat is taken away by the air flowing in the shade, and an abnormal rise in the temperature of the instrument body can be further prevented. In addition, the amount of light entering the ceiling surface increases, and the brightness further increases.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 1 to 3, reference numeral 10 denotes a ceiling, 11 denotes an embedded lighting fixture embedded in an opening 13 of the ceiling 10, and 12 denotes a heat insulating material installed on an upper surface of the ceiling 10. The heat insulating material 12 is made of glass wool, rock wool, or the like.

The embedded lighting fixture 11 has a fixture body 17 having a downward opening with a socket 14, a reflector 15, and other electric parts (not shown) built therein, and an L on the side of the fixture body 17.
It is composed of a power supply line connection terminal block 16 serving as a VA branch point provided via a shape fitting 18, and a shade 19 covering the lower surface of the lamp. A packing 23 is provided on the lower edge of the appliance body 17 and abuts against a ceiling surface 22 around the opening 13 to prevent dust and the like from entering the ceiling from between the ceiling 10 and the appliance body 17. . Note that the fixture main body 17 locks a mounting bracket (not shown) protruding from the outer periphery to the upper surface of the ceiling 10, and the ceiling fitting 10 and the lower end edge of the fixture main body 17 connect the mounting bracket to the upper end of the fixture main body 17.
Is installed.

The socket 14 is equipped with a lamp 20 such as a mini krypton bulb. Also, the reflection plate 1
The lower edge of 5 reaches the ceiling surface 22 around the opening 13 and is bent upward to form a decorative frame 21. Note that the lower surface of the lamp 20 projects slightly below the lower surface of the decorative frame 21. The seed 19 is made of a thin sheet of diffusion translucency (for example, paper or resin), and is formed in an inverted conical shape having a vent 27 on the lower surface. The shade 19 is suspended from the instrument body 17 via a plurality of fixtures 24.
That is, as shown in FIG. 2, a plurality of locking holes 25 are formed at predetermined intervals on the lower surface of the decorative frame 21, and the attachment holes 29 are opened in the shade 19. Then, an outwardly bent locking piece 30 at the upper end of the mounting tool 24 is inserted into the locking hole 25 and locked by the restoring force of the spring steel, and the shade 19 is screwed into the screw hole 31 at the lower end of the mounting tool 24. The shade 19 is fixed by fastening the fastener 26 inserted through the mounting hole 29.
The length of the attachment 24 is set so that a ventilation slit 28 for air circulation is formed between the upper end of the shade 19 and the lower surface of the decorative frame 21.

FIG. 3 is a top view of the embedded lighting fixture 11 mounted on the ceiling 10 in this manner. According to the ceiling-mounted lighting device configured as described above, the rising airflow that has entered the shade 19 through the ventilation hole 27 on the lower surface of the shade 19 is exhausted through the ventilation slit 28 between the shade 19 and the decorative frame 21. You. In this air circulation process, the heat of the lamp 20 protruding substantially flush with or below the lower surface of the decorative frame 21 can be taken away, and a rise in the temperature of the embedded lighting fixture 11 can be suppressed. Therefore, discoloration of the ceiling surface 22 due to heat can be prevented, the temperature of the insertion portion of the power supply line connection terminal block 16 can be suppressed to 45 ° C., and damage to the insulating coating of the power supply line can be prevented.

Further, since the lower surface of the lamp 20 is covered with the shade 19, the diffused light transmitted through the shade 19 is
Also, the whole becomes bright. In addition, by making the light of the lamp 20 wrap around the ceiling surface 22, a highly attractive lighting device can be provided. Further, since the lower surface of the lamp 20 is covered with the shade 19, the direct light of the lamp 20 can be emitted directly below the vent 27 of the shade 19 or the shade 1
9 is one of the ventilation slits 28 between the upper end of the frame 9 and the decorative frame 21. In a normal life, there is no special situation such as looking up the lighting fixture from directly below or looking into the ventilation slit 28 at the upper end of the shade 19. Thus, glare can be prevented.

Further, by projecting the lower surface of the lamp 20 substantially flush with or below the lower surface of the decorative frame 21, the position of the lamp 20 shifts downward and separates from the appliance body 17. Heat load can be reduced. Further, the instrument body 17 and the shade 19 are separate bodies, and the shade 19 can be replaced to easily respond to a change in taste.

Further, since the socket 14 and the lamp 20 are in the vertical direction, the lamp 20 can be easily replaced. Another embodiment of the present invention is shown in FIGS. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. In this embodiment, an annular decorative frame 40 is installed on the ceiling surface 22 around the embedded lighting fixture 11 separately from the reflector. The lower surface of the lamp 20 projects below the lower surface of the decorative frame 40.

The shade 19 is suspended by a plurality of hanging members 41, and the mounting hole 29 of the shade 19 is reinforced. FIGS. 5 and 6 show how the mounting hole 29 is reinforced. Reference numeral 50 denotes a reinforcing cylindrical body having large-diameter portions 52 and 53 each having a large diameter at one end and small diameters at the other end. The reinforcing cylinder 50 is inserted through the hole 29, and the retaining ring 51 is fitted and fixed to the small-diameter enlarged diameter portion 53.

As shown in FIGS. 7 and 8, the hanging member 41 locks the locking piece 45 at the upper end with the locking slit 25, and the reinforcing cylinder 50 inserted through the hole 29 of the shade 19. In addition, the cylindrical body 43 is inserted through the ring portion 46 at the lower end of the hanging member 41, and a groove 44 formed on the outer periphery of the cylindrical body 43.
The ring portion 46 of the hanging member 41 is fitted into (FIG. 4), and the fastener 42 is inserted into the cylinder 43, and the leg 42 'is hooked on the other end surface of the cylinder 43 and fixed.

The same effect as that of the above-described embodiment can be obtained in the ceiling-mounted lighting fixture thus configured. In each of the above embodiments, the shade 19
Although the shape is an inverted cone with an opening formed at the lower end, the shape is not limited to such a shape. For example, the shape may be an inverted pyramid or a tube. Further, the ventilation hole 27 at the lower end of the shade 19 is not limited to a circular shape, but may be, for example, a square.

Further, the decorative frame does not have to be particularly provided.
It is sufficient that the lower surface of the lamp 20 protrudes below the ceiling surface 22. If the lower surface of the lamp 20 protrudes below the ceiling surface 22 as described above, heat is taken away by the air flowing through the shade 19 and an abnormal rise in temperature of the lighting fixture can be prevented. Further, in place of the structure of the shade mounting portion in the ceiling-mounted lighting device shown in FIGS. 1 to 3, the structure of the shade mounting portion in the ceiling-mounted lighting device shown in FIGS. 4 to 8 is applied. Is also good.

[0019]

According to the ceiling-embedded lighting device of the first aspect, since the air flow openings are formed between the lower surface of the shade covering the lower surface of the lamp and the ceiling and the ceiling surface, respectively, the lower surface of the shade is provided. Air is sucked into the shade from above, and is exhausted from between the ceiling and the ceiling at the upper end of the shade. During this air circulation process, the lamps that protrude substantially flush with or below the ceiling surface take away the heat, preventing an abnormal rise in the temperature of the fixture body, discoloring the ceiling surface and insulating the power lines. Can be prevented from being damaged. Also, since the bottom of the lamp was covered with shade,
There is an effect that the diffused light transmitted through the seeds also hits the ceiling surface, so that the whole becomes bright and a highly attractive lighting device can be provided.

According to the ceiling-mounted lighting device of the second aspect, in addition to the function of the first aspect, the lower surface of the lamp projects substantially flush with or below the lower surface of the decorative frame, so that the lamp can be provided. It is located lower, and the amount of protrusion from the ceiling surface increases. As a result, more heat is taken away by the air flowing in the shade, and an abnormal rise in the temperature of the instrument body can be further prevented. In addition, the amount of light entering the ceiling surface also increases, which has the effect of further increasing the brightness.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a ceiling-mounted lighting device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a shade attachment portion according to the embodiment of the present invention.

FIG. 3 is a perspective view of a ceiling-mounted lighting device according to an embodiment of the present invention.

FIG. 4 is an exploded perspective view of a ceiling-mounted lighting device according to another embodiment of the present invention.

FIG. 5 is a sectional view showing a reinforcement structure of a shade according to another embodiment of the present invention.

FIG. 6 is a perspective view of a reinforcing member of a shade according to another embodiment of the present invention.

FIG. 7 is a front view of a fixture according to another embodiment of the present invention.

FIG. 8 is a sectional view of a shade attachment portion according to another embodiment of the present invention.

[Description of Signs] 10 Ceiling 11 Recessed lighting fixture 12 Insulation material 13 Opening 17 Fixture body 19 Seed 20 Lamp 21, 40 Makeup frame 22 Ceiling surface 27 Vent 28 Vent slit

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takashi Yuki 1-4-1 Shinsenri Nishimachi, Toyonaka-shi, Osaka National Housing Industry Co., Ltd.

Claims (2)

[Claims] 1. A recessed luminaire in which an opening is formed in a ceiling whose upper surface is insulated and formed so as to be buried, wherein a lower surface of the lamp projects substantially flush with or lower than the ceiling surface. An embedded ceiling lighting device, wherein an air flow opening is formed between the lower surface of the shade covering the lower surface and the shade and the ceiling surface. 2. The ceiling-mounted lighting device according to claim 1, wherein the lower surface of the lamp projects substantially flush with or below the lower surface of the decorative frame provided on the ceiling surface around the opening.