JP2916335B2 - lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture for performing indirect lighting using a plurality of straight tube fluorescent lamps.

[0002]

2. Description of the Related Art FIGS. 6 and 7 show the structure of a conventional lighting fixture for indirect lighting. In these figures, reference numeral 1 denotes a rectangular box-shaped appliance main body having an open lower surface, in which a trapezoidal reflector 2 which is upwardly convex is housed, and a back surface of the reflector 2 and an appliance are provided. The discharge lamp stabilizer 3 is accommodated in a space between the inner surface of the main body 1 and the discharge lamp stabilizer 3. Further, a straight tube-type fluorescent lamp 4 facing the reflection plate 2 is attached to the opening of the fixture body 1 via a lamp socket 5 along the inner surface of each side wall of the fixture body 1. The apparatus main body 1 is provided by being inserted into a mounting hole 6a formed in the ceiling plate 6, and is mounted on a suspension bolt (not shown) hanging from a ceiling slab (not shown). A rectangular frame-shaped cover 7 that covers the opening edge 1a of the instrument body 1 and each fluorescent lamp 4 is attached to the lower surface of the instrument body 1. The cover 7 is opaque.

In this luminaire for indirect illumination, light projected downward from the fluorescent lamp 4 is blocked by a cover 7. Then, the light projected upward from the fluorescent lamp 4 is reflected downward by the reflecting surface of the reflecting plate 2 and is projected downward through the opening 7a of the cover 7, thereby performing indirect illumination.

[0004]

Since the lighting fixture having the above-mentioned structure is an embedded fixture, there is a problem that the work for mounting on the ceiling is poor, and the ceiling cannot be illuminated, and the room can be widely and softly illuminated. In addition, since the fluorescent lamp 4 is surrounded by the apparatus main body 1 and the lamp cover 7, the heat emitted from the fluorescent lamp 4 is easily trapped in the apparatus main body 1 and the temperature tends to increase. There is also a problem.

An object of the present invention is to provide a lighting fixture for indirect lighting, which has good workability for mounting on a ceiling, can make the ceiling bright, and can reduce a rise in temperature.

[0006]

In order to achieve the above object, a lighting apparatus according to the present invention comprises a rectangular reflector mounted on a ceiling surface, and a straight tube reflector mounted on each peripheral portion of the reflector. A fluorescent lamp, a lamp having a central opening, and having a rectangular ring shape, and arranged to cover each of the fluorescent lamps from below.
The lamp cover and the inner and outer peripheral walls of the lamp cover
Away from the well and reflector, and
The reflective plate is provided with a ventilation space communicating with the central opening.
Supporting means for supporting the lamp cover .

[0007]

In the configuration of the luminaire for indirect illumination, the reflector uses the light projected upward from the fluorescent lamp toward the reflector as light for indirect illumination passing through the central opening of the lamp cover. Reflects downward. The lamp cover prevents the fluorescent lamp from being viewed directly from below the fixture, and since the outer peripheral wall is separated from the ceiling surface and the reflector, the fluorescent lamp attached to each peripheral portion of the reflector is provided. Light projected upward from the lamp to the outside of the reflector can illuminate all around the ceiling fixture. And reflection
By means of supporting the lamp cover on the plate, the lamp cover
The inner and outer peripheral walls of the bar are separated from the ceiling surface and the reflector,
The upper part of the fluorescent lamp is not blocked and
Lamp cover between the lamp cover and the ceiling or reflector
A ventilation gap communicating with the central opening of the
Air can flow through these central openings and ventilation gaps,
The air thus circulated allows the heat generated by the fluorescent lamp to escape around the ceiling fixture.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2, reference numeral 11 denotes a metal mounting base which is mounted on the ceiling surface A via a plurality of screws 12 (see FIG. 2). At both ends in the longitudinal direction of the base 11, downward edges 11a are bent at right angles. A power supply line lead-in hole 13 guided from the ceiling is formed in the mounting base 11, and a terminal block 14 is mounted on the lower surface. The terminal block 14 is connected to a power supply line (not shown) drawn from the ceiling, and is also connected to an in-apparatus wiring (not shown).

A reflecting plate 15 made of a metal plate having a square planar shape is mounted on the ceiling surface A via a mounting base 11. More specifically, vertical walls 15a (only one is shown in FIG. 2) formed on a pair of opposing side walls of the reflection plate 15 are overlapped with the downward edge 11a of the mounting base 11, and these are screwed with a screw 16 ( 1 and 2), the reflector 15 is attached to the ceiling surface A while covering the attachment base 11.

As shown in FIG. 1, mounting portions 15b projecting toward the mutually approaching direction are bent at the upper ends of another pair of opposite side walls of the reflecting plate 15, and the lower surfaces of these mounting portions 15b are bent. , A lighting device 17 is attached to each. As the lighting device 17, an electronic ballast formed by combining transistors and other electronic components is used, and the thickness shown in the figure is as thin as about 20 mm. Instead of this electronic ballast, a discharge lamp ballast having a coil attached to an iron core may be used as the lighting device 17, and the lighting device 17 and the terminal block 14 may be used.
Are electrically connected to each other via a detachable connector (not shown).

The corners of the reflection plate 15, ie, the four corners, are supported.
The socket mounting plates 19 are respectively mounted via, for example, hollow columns 18 forming means . Each socket mounting plate 1 spaced below the reflecting plate 15 by the length of the column 18
9, a lamp socket 20, as shown in FIG.
The lamp holder 21 and the cover holding part 22 are attached respectively. A lead wire (not shown) connected to a terminal fitting (not shown) of the lamp socket 20 is wired through the inside of the support column 18 and connected to the lighting device 17.

Lamp socket 20 and lamp holder 2
1, the lamp socket 20 and the lamp holder 21 mounted on the same socket mounting plate 19 are mounted so that they are turned 90 degrees each other. A straight tube-type fluorescent lamp 23 is detachably attached to each peripheral portion of the reflection plate 15 via the lamp socket 20 and the lamp holder 21. The four fluorescent lamps 23 are bar-shaped lamps each having a base with a discharge path bent in a U-shape. The bases are detachably connected to the lamp socket 20. In this mounted state, the fluorescent lamp 23 protrudes slightly outward from the reflector 15 as shown in FIG.

A lamp cover 24 made of an opaque material such as a synthetic resin or a metal plate has a central opening 24a and is formed in a rectangular ring shape.
3 is arranged. The cover 24 is larger than the reflection plate 15 and is detachably provided via cover attaching means. The cover attaching means includes the cover holding portion 22 and the connecting member 2 which is provided at four corners of the lamp cover 24 so as to project upward to be detachable from the cover holding portion 22.
5 are formed.

More specifically, as shown in FIGS. 4 and 5, the cover holding portion 22 is formed by incorporating a leaf spring 28 in a hollow holding portion main body 27 having a through hole 26 in the lower wall. The leaf spring 28 is formed of a pair of U-shaped hooking pieces 28
In the free state, the latching pieces 28a come into contact with each other by their own elastic force as shown by a two-dot chain line in FIG. The connecting member 25 has a thickness that can be inserted into the through hole 26, has an annular engaging groove 25a at the upper end thereof, and has a taper upper portion than the groove 25a.

The cover attaching means is provided with a connecting member 25.
Through the through hole 26, the locking piece 28 of the leaf spring 28
a is pushed open against its elastic force, and immediately thereafter, these engaging pieces 28a are elastically engaged with the engaging grooves 25a. With this engagement, the lamp cover 24 can be attached and held below the reflecting plate 15. . Therefore, the cover 24 can be easily attached by a one-touch operation of pushing up the lamp cover 24 after the alignment. Of course, even when it is necessary to remove the lamp cover 24 at the time of lamp replacement or the like, the lamp cover 24 can be easily removed by pulling down the cover 24 against the spring force of the leaf spring 28. .

As shown in FIG. 1, the lamp cover 24
Are obliquely upward inner peripheral wall 24b and obliquely upward outer peripheral wall 2
4c, and covers each fluorescent lamp 23. The inner peripheral walls 24b and 24c are inclined in opposite directions so that the inner peripheral walls 24b and 24c gradually widen toward the upper end. The upper end of the inner peripheral wall 24b is separated from the reflector 15 and the upper end of the outer peripheral wall 24c located outside the outer periphery of the reflector 15 is separated from the ceiling surface A.
You. Therefore, the inner and outer peripheral walls 24b and 24c are
Between the well A and the reflector 15, a central opening 24a is provided.
Is formed, and this gap G is
The flow of air passing through is allowed.

Each frame piece of the lamp cover 24 is provided with a number of slits 29 extending between the roots of the inner and outer peripheral walls 24b and 24c. These slits 29 prevent the lower surface of the lamp cover 24 from being darkened by passing a part of the light going downward from the fluorescent lamp 23, and allow the air for cooling the fluorescent lamp 23 to flow below the lamp cover 24. It comes to take in from. Instead of these slits 29, a milky white translucent panel may be provided in the area where the slits 29 are provided, or the entire lamp cover 24 may be formed of a milky white translucent material. May be omitted in the present invention.

The lighting fixture for indirect lighting having the above configuration is attached to the ceiling surface A as follows. First, the ceiling surface A
The mounting base 11 is fixed via screws 12. Next, after connecting the terminal block 14 side and the lead wire on the reflection plate 15 side via the connector (not shown), the reflection plate 15 is fixed to the mounting base 11 with screws 16 and the ceiling surface A
The reflection plate 15 is directly attached to. Thereafter, the fluorescent lamps 23 are respectively placed on the lower side of the peripheral portion of the reflector 15 in the lamp socket 20.
And the lamp holder 21. Finally, the lamp cover 24 is mounted via the lamp mounting means as described above.

The above procedure completes the installation of the luminaire on the ceiling surface A. FIG. 1 shows a state in which the luminaire is mounted on the ceiling surface A. The four fluorescent lamps 23 mounted on the periphery of the reflector 15 face the reflector 15 and the fixture around the ceiling A, respectively. ing.

According to the lighting fixture for indirect lighting mounted as described above, there is no trouble in processing the hole for embedding the fixture in the ceiling, and the ceiling face A can be directly mounted on the ceiling A more easily than the embedded lighting fixture. It can be attached to the ceiling and has good workability.

When the fluorescent lamp 23 of the lighting fixture for indirect lighting directly attached to the ceiling surface A is turned on, the light projected upward from the fluorescent lamp 23 toward the reflection plate 15 is shown in FIG. As shown by the arrow B, the light is reflected downward by the reflection plate 15, and is radiated to the lower irradiated portion as light for indirect illumination through the opening 24 a of the lamp cover 24. In addition, the entire area around the reflector 15 from the fluorescent lamp 23
The light projected upward toward the illuminated portion is reflected downward by the entire device around the ceiling surface A as shown by an arrow C in FIG.

As described above, light can be reflected downward by using not only the reflecting plate 15 but also the vicinity of the fixture on the ceiling surface A, so that a wide light distribution can be obtained, and the entire periphery of the fixture can be obtained. By illuminating the ceiling surface A of the ceiling, it is possible to prevent shadows from forming around the appliances,
Can be made brighter around the appliance.

The lamp cover 24 is provided with the fluorescent lamp 2.
The cover 24 and the reflection plate 1 are not covered
5 and a ventilation gap G corresponding to the height of the column 18 is formed.
And the ventilation corresponding to the ceiling A
Gap G is formed and these gaps G
The space communicates with the central opening 24a of the lamp cover 24
Flows upward through these ventilation paths
Emitted from the fluorescent lamp 23 by the flow of air
Heat can be quickly released around the ceiling A
You. Therefore, the heat of the fluorescent lamp 23 does not stay in the apparatus, and the rise in the temperature of the appliance can be suppressed.

[0024]

As described in detail above, according to the lighting fixture of the present invention, the ceiling-mounted lighting fixture can be used in spite of indirect lighting, so that the installation work of the fixture on the ceiling can be performed. The ceiling lamp can be brightened by illuminating the entire area around the ceiling with the light projected upward from the fluorescent lamps attached to each peripheral part of the reflector toward the outside of the reflector. The heat generated by the lamp cover
From the center opening of this cover to the reflector and ceiling
Ceiling side through the ventilation gap secured by the support means between
The temperature rise of the appliance can be reduced without releasing the heat to the surroundings and keeping the appliance warm.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a configuration of an entire lighting fixture for indirect lighting according to an embodiment of the present invention.

FIG. 2 is an exemplary exploded perspective view showing the lighting apparatus according to the embodiment;

FIG. 3 is an exemplary perspective view showing the entire lighting apparatus according to the embodiment;

FIG. 4 is an exploded perspective view showing a configuration of a cover attaching means of the lighting fixture according to the embodiment.

FIG. 5 is a sectional view showing the configuration of the cover attaching means shown in FIG. 4;

FIG. 6 is a schematic cross-sectional view showing the configuration of an entire lighting fixture for indirect lighting according to a conventional example.

FIG. 7 is an exploded perspective view showing the entire lighting apparatus according to the conventional example.

[Explanation of symbols]

A: ceiling surface, G: ventilation gap, 11: mounting base, 15
... reflecting plate, 18 ... post (support means) , 19 ... socket mounting plate, 20 ... lamp socket, 21 ... lamp holder,
22: cover holding part (cover attaching means), 23: fluorescent lamp, 24: lamp cover, 24a: opening, 24
... inner peripheral wall, 24c ... outer peripheral wall, 25 ... connecting tool (cover attaching means).

Continuation of the front page (56) References JP-A 3-64415 (JP, U) JP-A 59-149309 (JP, U) JP-A 61-126504 (JP, U) JP 2-27455 (JP) , Y2) (58) Field surveyed (Int. Cl. ⁶ , DB name) F21S 3/02 F21V 17/00

Claims (1)

(57) [Claims] 1. A rectangular reflector mounted on a ceiling surface,
A straight tube fluorescent lamp attached respectively to each peripheral portion of the reflecting plate forms a rectangular ring having a central opening, each
Lamp cover placed over fluorescent lamp from below
And the inner and outer peripheral walls of this lamp cover
The central opening is separated from the reflector and between them.
The lamp is provided on the reflector by providing a ventilation interval communicating with the lamp.
A lighting device comprising: a support unit configured to support the cover .