JPH06131905A - lighting equipment - Google Patents

Abstract

(57) [Summary] [Object] The object of the present invention is to be able to form a thin shape,
The purpose is to obtain a lighting device for indirect lighting, which has good installation workability on the ceiling. [Structure] A reflecting plate 22 connected to a mounting base 11 directly mounted on a ceiling surface A has a pair of reflecting portions 22a, 22a having an arcuate cross section, which are convex upward, connected in the width direction, and a center portion in the width direction. Has a central convex portion 22b which tapers gradually downward. Straight tube fluorescent lamps 25 facing the reflecting surface of the reflector 22 are attached to both ends of the reflector 22 in the width direction, and lamp covers 24 that cover the lamps 25 from below are attached to both ends of the reflector 22 in the width direction. Set up. Following the shape of the central convex portion 22b of the reflecting plate 22, the lighting device 14 is housed at least partially in the inter-reflecting portion gap 26 formed on the back side of the central convex portion 22b, and the mounting base 11 and the reflecting plate 22 are provided. It is characterized in that it is arranged between.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art FIGS. 6 and 7 show the structure of a conventional luminaire for indirect lighting. In the drawings, reference numeral 1 denotes a rectangular box-shaped instrument main body with an open lower surface, inside which is housed a reflector plate 2 having an arcuate cross-section that is convex upward, and the back surface of the reflector plate 2 A discharge lamp ballast 3 is housed in the space between the inner surface of the appliance body 1. Further, straight tube fluorescent lamps 4 are mounted in the instrument body 1 so as to face both sides of the reflector 2 via lamp sockets 5, respectively. The fixture body 1 has a mounting hole 6 formed in the ceiling plate 6.
It is provided by being inserted into a and is attached to a hanging bolt (not shown) hanging from a ceiling slab (not shown). Then, a rectangular frame-shaped cover 7 that covers the opening edge 1 a of the instrument body 1 and the fluorescent lamp 4 is attached to the lower surface of the instrument body 1. The cover 7 is opaque.

In this illuminating device for indirect illumination, the light projected downward from the fluorescent lamp 4 is blocked by the cover 7. Then, the light projected upward from the fluorescent lamp 4 is reflected downward by the reflecting surface of the reflecting plate 2 as shown by the arrow in FIG. 6, and projected downward through the opening 7a of the cover 7, This provides indirect lighting.

[0004]

Since the luminaire having the above-mentioned structure is an embedded luminaire, there is a problem that the installation workability on the ceiling is poor. Further, in the lighting device having the above-described configuration, since the cross section of the reflection plate 2 in the width direction has a single arc shape, the reflection plate 2
Is deep. Therefore, there is a problem that the thickness of the instrument main body 1 that houses the reflector 2 is large. Therefore, it is not appropriate to use the lighting fixture as a ceiling-mounted lighting fixture.

An object of the present invention is to obtain a lighting fixture for indirect lighting, which can be formed thin and has good installation workability on the ceiling.

[0006]

In order to achieve the above object, the luminaire of the present invention comprises a mounting base directly mounted on the ceiling surface and a pair of reflecting portions having an arcuate cross section which is convex upward. A reflector having a central convex portion that is continuous in the width direction and gradually tapers downward in the widthwise central portion; connecting means for connecting the reflector to the mounting base; and a reflecting surface of the reflecting plate. And straight tube fluorescent lamps respectively attached to both widthwise ends of the reflector, and lamp covers respectively provided at both widthwise ends of the reflector covering the fluorescent lamps from below, Lighting that is arranged between the mounting base and the reflection plate by accommodating at least a part in the inter-reflection space formed on the back side of the central convex portion according to the shape of the central convex portion of the reflecting plate. And a device.

[0007]

In the structure of the luminaire for indirect illumination, the lamp cover blocks the light projected downward from the fluorescent lamp, and the reflector plate shields the light projected upward from the fluorescent lamp.
It reflects downward as light for indirect illumination that passes between the lamp covers. Further, since the mounting base is fixed to the ceiling surface and the connecting means connects the reflecting plate to the mounting base fixed to the ceiling surface, a ceiling-mounted lighting fixture can be configured. Further, since the reflector has a pair of reflectors having an arcuate cross section, the depth of both reflectors can be reduced to reduce the height of the reflector, and at the back side of the central convex portion of both reflectors. The thickness of the fixture can be reduced because at least a part of the lighting device arranged between the reflection plate and the mounting base is housed therein by using the formed gap between the reflection parts.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. 1 to 4 is a screw 12 on the ceiling surface A
It is a mounting base mounted via (see FIG. 3). The base 11 is a base main portion 1 that overlaps with the ceiling surface A.
As shown in FIG. 3, the base main portion 1 is formed of a metal plate formed by integrally bending downward edges 11b on both side edges of 1a.
A power line lead-in hole 13 is formed in 1a.

As shown in FIG. 3, a lighting device 14 is attached to the lower surface of the base main portion 11a, and
A terminal block 15 is attached near the hole 13. The lighting device 14 uses an electronic ballast that is a combination of transistors and other electronic components, and the thickness shown in the figure is as thin as about 20 mm. Instead of the electronic ballast, a ballast for a discharge lamp having a coil attached to an iron core may be used as the lighting device 14.

As shown in FIGS. 3 and 4, a pair of leaf springs 16 are fixed by rivets 17 to both longitudinal ends of the base main portion 11a. These leaf springs 16
Has a locking portion 16a bent in a substantially U shape, and this locking portion 16a is a downward edge 11b of the mounting base 11.
Through the hole 18 formed in the. The leaf spring 16 can move in and out of the hole 18 due to its elastic deformation.

A reflecting plate unit 21 is detachably attached to the mounting base 11 from below via a connecting means 30 which will be described later. The reflector unit 21 includes a reflector 22, a pair of left and right end plates 23, and a pair of lamp covers 2.
4, and two straight tube fluorescent lamps 25 are detachably attached to the unit 21.

The reflection plate 22 formed by bending a metal plate is
As shown in FIG. 1, a pair of reflecting portions 22a having an arcuate cross-section that is convex upward are formed in a row in the width direction. By having such a reflection portion 22a, the reflection plate 22
A central convex portion 22b that tapers downward is formed in the central portion in the width direction of the, and the inter-reflector plate gap 26 (see FIG. 1) that follows the shape of the central convex portion 22b is formed on the back surface (upper surface). ) Has been formed. Both side edges of the reflector 22 are curled to the back surface side.

As shown in FIGS. 2 and 3, the end plates 23 made of synthetic resin cover the both ends in the longitudinal direction of the reflection plate 22 and are connected to the reflection plate 22 by screwing or the like. Both end portions of the end plates 23 in the longitudinal direction (the same as the width direction of the reflection plate 22) are projected downward, and the lamp sockets 27 (only one is shown in FIG. 5) are separately provided on the inner surfaces of the respective portions. Installed. The fluorescent lamp 25 is provided in the lamp socket 27 facing the longitudinal direction of the reflector 22.
Both ends of are connected. Therefore, the fluorescent lamps 25 are attached to both ends of the reflection plate 22 in the width direction and face the lower surface (reflection surface) of the reflection plate 22.

The lead wire (not shown) connected to the lamp socket 27 is pulled out along the inner surface of the end plate 23 (the surface where the end surface of the reflection plate 22 abuts), and the reflection plate 22 is then drawn.
Shown in the lead wire drawn from the lighting device 14 and the terminal block 15 through the notch (not shown) that is cut at the end of the lighting device 14 to form a hole between the end plate 23 and the rear surface of the reflection plate 22. Not connected to each other via removable connectors.

A non-translucent lamp cover 24 made of a synthetic resin or a metal plate is arranged between the end plates 23 and covers the lower half of the fluorescent lamp 25. This cover 24
Is attached so as to be rotatable in the directions of arrows B and C in FIG. 1 via pivots 28 (see FIG. 1) inserted at both ends in the longitudinal direction of the curling edge portion 22c of the reflection plate 22.
As shown in FIG. 1, the fluorescent lamp 25 is held in a position to cover it by a torsion spring (not shown).

The reflecting plate unit 21 having the above-mentioned structure has the width dimension and the dimension in the longitudinal direction which are equal to those of the mounting base 11.
Is formed to be larger than the width dimension and the dimension in the longitudinal direction. Then, connecting fittings 29 are attached by spot welding to the back surfaces of both reflecting portions 22a of the reflecting plate 22, respectively. As shown in FIG. 4, the vertical plate portions of these connecting fittings 29 are provided with engaging holes 29a for engaging and disengaging the engaging portions 16a of the leaf springs 16. The leaf spring 16 and the connecting fitting 29 form a connecting means 30.

The luminaire for indirect illumination having the above-described structure is attached to the ceiling surface A as follows. First, the ceiling surface A
The mounting base 11 is fixed to the ceiling surface A with the screws 12 by overlapping the base main portion 11a. Next, after connecting the mounting base 11 side and the lead wire on the reflection plate unit 21 side through the connector (not shown), the reflection plate unit 21 is mounted on the mounting bracket 29 and the mounting base 11 attached thereto. It is pressed against the ceiling surface A side with the leaf spring 16 aligned.

Then, the leaf spring 16 is pushed by the vertical plate portion of the connecting fitting 29 guided to the outer surface of the downward edge portion 11b of the mounting base 11, and the locking portion 16a thereof is inserted into the hole 18 of the downward edge portion 11b. After being displaced while elastically deforming in the direction of the arrow in FIG.
When the locking holes 29a of the
Due to the elastic return of the leaf spring 16, the locking portion 16a
Is passed through. Therefore, with a simple one-touch operation of pushing up the reflection plate unit 21, the connection fitting 29 can be hooked on the plate spring 16 to connect the reflection plate unit 21 to the mounting base 11.

Finally, the lamp cover 24 of the reflection plate unit 21 is manually rotated about the pivot 28 as shown by the chain double-dashed line in FIG. 1, and the fluorescent lamp 25 is attached to the reflection plate unit 21 in this state. Install. By the above procedure, the attachment of the instrument to the ceiling surface A is completed.

As described above, according to the lighting device for indirect lighting, there is no trouble of processing a hole for embedding the device in the ceiling, and the lighting device is directly attached to the ceiling surface A more easily than the embedded lighting device. The installation workability to the ceiling is good.

When the fluorescent lamp 25 of the lighting device for indirect lighting directly attached to the ceiling surface A is turned on, this lamp 2
The light projected downward from 5 is blocked by the lamp cover 24 and is not irradiated as direct light to the irradiated portion. The light projected upward from the fluorescent lamp 25 is separately reflected downward by both reflecting portions 22a of the reflecting plate 22 as shown by the thin line arrow in FIG. 1, and passes between the lamp covers 24. And is irradiated to the irradiated portion as light for indirect illumination.

The mounting state of the lighting equipment on the ceiling surface A is shown in FIG.
, The lower part of the lighting device 14 mounted on the mounting base 11 is housed in the inter-reflecting part gap 26 on the back side of the central convex part 22b of the reflecting plate 22, and the both reflecting parts 2 are
The reflective portion 22a is in contact with the back surface of 2a and serves as a heat dissipation plate.

In the direct lighting fixture for indirect illumination of the ceiling, since the reflector 22 is formed by connecting a pair of reflecting portions 22a having an arcuate cross section in the width direction, the openings of these reflecting portions 22a are formed. The width F is reduced, and the depth (in other words, the height of the reflection plate 22) H (see FIG. 1) can be reduced. Therefore, the thickness dimension J of the entire instrument can be reduced accordingly. It is also possible to increase the depth of both reflecting portions 22a with the opening width F as it is, but if this is done, the reflected light will be concentrated underneath the fixture, and therefore for indirect illumination. Is not suitable as a lighting fixture. In addition, since the lower part of the lighting device 14 arranged between the reflecting plate 22 and the mounting base 11 is housed in the inter-reflecting part gap 26 formed on the back side of the central convex part 22b between both reflecting parts 22a, The thickness dimension J of the entire fixture can be reduced according to the vertical overlapping dimension I of the reflector 22 and the lighting device 14. Therefore, it is possible to realize a thin ceiling-mounted luminaire for indirect lighting.

Further, due to the dimensional difference between the mounting base 11 and the reflection plate unit 21, the ceiling surface A and the reflection plate unit 21.
Space E surrounding the mounting base 11 with the peripheral part of
Is formed. This space E is a ceiling surface A if necessary.
When the reflection plate unit 21 is removed from the housing, that is, when the reflection plate unit 21 does not come off the mounting base 11 despite its strong pulling, the locking portion 16a of the leaf spring 16 is pushed into the hole 18. Used as a work space. Moreover, the presence of such a space E prevents the mounting base 11 from being visually recognized from below, and visually gives the impression that the entire lighting fixture is floating above the ceiling surface A, and makes the fixture thinner. Can make you feel.

The present invention is not limited to the above embodiment. For example, the lamp cover 24 may be made of a translucent material. Further, the lighting device 14 may be attached to the back surface of the reflection plate 22, or the end plate 23 made of synthetic resin and the main body of the lamp socket 27 may be integrally formed.

[0026]

As described above in detail, according to the luminaire of the present invention, the luminaire can be directly attached to the ceiling in spite of the fact that the illuminator is used for indirect illumination. In addition to the fact that the depth of the reflector can be reduced, the arrangement of the lighting device in the gap between the reflectors formed on the back side of the central convex portion of both reflectors of this reflector allows the entire fixture to be A thin luminaire having a small thickness can be provided.

[Brief description of drawings]

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

FIG. 2 is a diagram showing the entire lighting fixture according to the embodiment as viewed from the direction of arrow Z in FIG.

FIG. 3 is an exploded perspective view of the entire lighting fixture according to the embodiment.

FIG. 4 is an exploded cross-sectional view of a connecting means of the lighting equipment according to the embodiment.

FIG. 5 is an enlarged perspective view showing a part of a reflection plate unit of the lighting equipment according to the embodiment.

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

FIG. 7 is an exploded perspective view of the entire lighting fixture according to the conventional example.

[Explanation of symbols]

11 ... Mounting base, 14 ... Lighting device, 22 ... Reflector,
22a ... Reflecting part, 22b ... Central convex part, 24 ... Lamp cover, 25 ... Fluorescent lamp, 26 ... Gap between reflecting parts, 30 ...
Connection means.

Claims (1)

[Claims] 1. A mounting base that is directly mounted on a ceiling surface, and a pair of reflecting portions having an upwardly convex arcuate cross-section in the width direction, which are tapered toward the center in the width direction. A reflection plate having a convex portion, a connecting means for connecting the reflection plate to the mounting base, and a straight tube-shaped silica tube which is attached to both end portions in the width direction of the reflection plate so as to face the reflection surface of the reflection plate. An optical lamp, a lamp cover that covers these fluorescent lamps from below and is provided at both ends in the width direction of the reflection plate, respectively, and on the back side of this central projection that follows the shape of the central projection of the reflection plate. A luminaire comprising: a lighting device, at least a part of which is housed in the formed inter-reflector space, and which is disposed between the mounting base and the reflector.