JP2653925B2 - 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 an open-bottom type luminaire using a straight tube fluorescent lamp, and more particularly to an improvement in the arrangement of a reflector in which a lighting device is housed on the back side and a lamp socket. The present invention relates to a lighting device that is thin and thin.

[0002]

2. Description of the Related Art FIG. 4 shows the structure of a conventional two-lamp lighting fixture embedded and fixed in a ceiling. The instrument body 1 having an open lower surface has a pair of left and right reflective side walls 1a arranged in a C-shape in a cross section in the width direction, and a horizontal reflective ceiling wall 1b extending between upper ends of the side walls 1a. The reflector 2 is installed in the instrument body 1. The reflector 2 has a pair of left and right flat reflectors 2a integrally connected at their lower ends to form a substantially V-shaped cross section in the width direction. It is attached to the instrument main body 1 via.
A lighting device 4 housed shallowly behind the reflector 2 is attached to the reflective ceiling wall 1a, and the reflective ceiling wall 1b
At both ends in the length direction (perpendicular to the plane of FIG. 4), socket mounting bases 5 each having a length extending over the entire width of the reflective ceiling wall 1b are fixed. A lamp socket 6 located between the reflection side wall 1a and the reflection plate 2a is attached to the both sides of the mounting base 5 which are separated from the reflector 2 downward in the vertical direction. The lamp sockets 6 each support a straight fluorescent lamp 7. In FIG. 4, reference numeral 8 denotes a plurality of parallel louver plates 9 provided below the reflector 2 so as to intersect in the width direction of the reflector 2.
Is a ceiling board. In the lighting fixture having such a configuration,
The lower end of the reflector 2 is substantially the same as the height position of the open lower surface of the appliance body 1, and a light shielding angle α of, for example, 30 ° is formed by the opening edge 1 c of the appliance body 1 and the lower end of the reflector 2. Have been.

[0003]

In the luminaire having the above construction, the maximum width Z of the reflector 2 is set to be the shortest distance between the tube walls of the pair of fluorescent lamps 7 so that the reflector 2 can be removed for maintenance or the like. Y, and the position of the lower surface of the appliance body 1 and the lower end of the reflector 2 with respect to the fluorescent lamp 7 is at a predetermined height X to obtain the light shielding angle α.
Need. Since the reflector 2 whose upper and lower ends are determined by such conditions is formed by integrally connecting the lower ends of the pair of flat reflectors 2a, the included angle β between the flat reflectors 2a of these reflectors 2 is obtained. Is small. However, since the lighting device 4 is stored on the back side of the reflector 2, the reflector 2 needs a large height dimension to enable the storage.
Further, in the lighting fixture having the above-described configuration, the socket mounting base 5 and the lamp socket 6 are provided side by side in the vertical direction, so that the height W between the lower end of the lamp socket 6 and the reflective ceiling wall 1b is large. In addition to the dimension W, the above-described height dimension X is required. Therefore, for these reasons, the conventional lighting fixture has a problem that its height V is large. As a result, the cost of materials and packaging of the equipment has increased, and the total cost of the equipment has been large.

SUMMARY OF THE INVENTION It is an object of the present invention to make it difficult to attach / detach a lamp, to make a difference in brightness between a reflective side wall of a fixture main body and a reflector opposed thereto, or to reduce fixture efficiency. An object of the present invention is to provide a lighting device that can be made thin.

[0005]

In order to achieve the above object, a lighting fixture according to the present invention has left and right reflecting side walls and a horizontal reflecting ceiling wall extending between upper ends of the side walls, and has a cross section in a width direction. Has a substantially U-shape, an appliance body having an open lower surface, a reflector facing the reflective side wall and provided obliquely to the opening, and a lighting device housed on the back side of the reflector, A socket mounting base provided at both ends in the longitudinal direction of the appliance body, a lamp socket mounted diagonally on the mounting base and disposed between the reflective side wall and the reflector, and supported by the lamp socket And the reflector is provided with an oblique first
A reflecting portion, and an oblique second reflecting portion bent to the back side of the reflector within an angle formed by an extension of the first reflecting portion and a vertical line of the reflecting ceiling wall connected to an upper end of the reflecting portion. And the boundary between the two reflecting portions is positioned above the height position at the center of the lamp.

[0006]

According to the structure of the present invention, since the lamp socket is mounted diagonally on the socket mounting base, the socket mounting base and the lamp socket do not line up in the vertical direction. Therefore, the lamp socket can be brought closer to the reflective ceiling wall of the fixture body regardless of the height dimension of the socket mount. Since the reflector has a configuration in which the upper end of the first oblique reflector is connected to the second oblique reflector that bends to the back of the reflector, the second reflector moves away from the lamp toward the socket mount. Is located. Therefore, a work space necessary for the operation of attaching and detaching the lamp can be secured between the reflector and the lamp. In addition, by providing the second oblique reflecting portion that is bent on the back side of the reflector, the inclination of the first reflecting portion can be increased, and the lighting device can be stored deeply behind the reflector. Furthermore, since the boundary between the first reflector and the second reflector is located above the height of the center of the lamp, light is applied to this reflector facing the first reflector occupying most of the reflector. The lamp wall area of the lamp that can be made incident can be made large, and this area can be made substantially the same as the lamp wall area of the lamp that can face the reflecting side wall of the instrument body and make light incident on this side wall. In addition, since both the first reflector and the second reflector are oblique,
Light incident thereon can be reflected downward.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1 to FIG. 3, reference numeral 21 denotes an open-bottomed sheet-metal device main body embedded and fixed in a ceiling.
It extends long in a direction perpendicular to the plane of the drawing of FIG. The main body 21 has left and right reflective side walls 22a and 22b arranged in a C-shape in a cross section in the width direction, and both ends in the longitudinal direction of the main body main part including a horizontal reflective ceiling wall 23 extending over the upper ends thereof. End plates 24 (see FIG. 3) are attached to the respective parts. The surface of the instrument body 21 is a reflection surface. In FIG. 2, reference numeral 23a denotes a reinforcing bead provided on the reflective ceiling wall 23 along the length direction thereof.

The instrument body 21 has a lower edge 21a protruding outward on the lower surface thereof. This lower edge 21a is shown in FIG.
The lower surface of the ceiling plate 25 shown in FIG. This lower edge 21a
And a straight line passing through a fluorescent lamp 29 described later and the lower edge 21.
The horizontal line passing through a is a light shielding angle α of approximately 30 degrees (see FIG. 1).
Are formed to intersect.

At both ends in the longitudinal direction of the instrument body 21, metal socket mounts 26 (only one is shown) are provided. The mounting legs 26a of the mounting base 26 are fixed to the surface of the reflective ceiling wall 23 as shown in FIG. 2, and the socket mounting base 26 has left and right inclined portions 27a, 2a.
7b. One inclined portion 27a is located on one reflective side wall 22a side and is inclined in a direction opposite to the side wall 22a, and the other inclined portion 27b is located on the other reflective side wall 22b side, It is inclined in the opposite direction to the side wall 22b.

A lamp socket 28 is mounted on each of the slanted portions 27, 27b so as to be substantially orthogonal to the slanted portions 27, 27b. Therefore, a pair of lamp sockets 28 mounted on one socket mounting base 26 are arranged in a C shape as shown in FIG. A straight tube-shaped fluorescent lamp 29 extending over the lamp socket 28 facing the length direction of the appliance body 21 is detachably supported.

A lighting device 30 is fixed on the surface of the reflective ceiling wall 23 of the fixture body 21 between the socket mounts 26. Further, a reflector mounting fixture 31 (only one is shown) is provided at each of both ends in the longitudinal direction of the instrument body 21. The mounting tool 31 includes a pair of arm portions 32a.
A spring 32 fixed to the surface of the reflective side wall 23 with
Each arm 32a has a locking projection 33a, and is formed of a locking member 33 fixed to a lower portion of each arm 32a that is inclined to approach each other.

The reflective side walls 22a and 22b are provided on the surface of the reflective ceiling wall 23 via the reflective plate attachments 31.
A reflector 34 located therebetween is attached. Reflector 3
Numeral 4 is made of a metal plate having substantially the same length as the instrument main body 21. As shown in FIG. 2 and the like, left and right reflecting plates 35a and 35b provided diagonally with respect to the lower surface opening of the instrument main body 1 , And have a substantially V-shaped cross section in the width direction. The included angle β between the reflection plates 35a and 35b is large (compared to the conventional case shown in FIG. 4). One reflecting plate 35a faces one reflecting side wall 22a with one fluorescent lamp 29 interposed therebetween, and the other reflecting plate 3a.
5b also faces the other reflective side wall 22b with the other fluorescent lamp 29 therebetween. The lower end of the reflector 34 is substantially the same as the height position of the lower edge 21a of the instrument body 21, that is, the lower edge 2
1a is located at the same height position or slightly above as shown in the figure, and a straight line passing through the lower end and the fluorescent lamp 29 and a horizontal line passing through the lower edge 21a have a light shielding angle α of about 30 degrees (see FIG. 1) and cross each other.

Each of the reflecting plates 35a and 35b has a slit-shaped engaging hole (not shown) which can be engaged with the engaging member 33 at both ends in the longitudinal direction. The reflector 34 is moved so as to press against the reflective ceiling wall 23 while flexing the spring 32 through the open lower surface of the instrument body 21, and hooks the latch hole on the latch protrusion 33 a of the latch member 33. Thereby, as shown in FIG. 1 and FIG. To remove the reflector 34, the locking projection 33a is pushed into the back side of the reflectors 35a and 35b while bending the spring 32, and the engagement between the locking projection 33a and the retaining hole is released to release the reflector 34. Should be lowered.

The reflector 34 attached as described above.
Most of the socket mount 26 and the reflector mount 31 are housed and arranged on the back side, respectively, and the lighting device 30 is also housed and arranged. The lighting device 30 is a reflector 3
4 is deeply housed (compared to the prior art shown in FIG. 4). Escapes (not shown) such as water or holes for projecting the socket 28 are provided at both ends in the length direction of the reflection plates 35a and 35b.

As shown in detail in FIG. 2, each of the reflectors 35a and 35b has a lower first reflector A and an upper second reflector B connected to the upper end thereof. The portion A occupies most of the reflection plates 35a and 35b. The second reflector B is bent to the back side of the reflector 34 within an angle γ formed by the extension line C of the first reflector A and the vertical line D of the reflective ceiling wall 23. As shown in FIG. 1, the width E between the upper ends of the second reflecting portions B is the shortest distance F between the tube walls of the pair of fluorescent lamps 29.
Less than. The boundary G between the first and second reflecting portions A and B, which are corner portions, is disposed above the height of the center H of the fluorescent lamp 29, and the separation dimension I is shown in FIG.
Is shown in

In FIGS. 1 to 3, reference numeral 36 denotes a sheet metal louver plate provided in parallel with each other, and these are mounted below the reflector 34 so as to cross the reflector 34. These louver plates 36 are attached to and detached from the open lower surface of the instrument body 21 with the attachment and detachment of the reflector 34 in a state of being attached to the reflector 34. Moreover, a straight line passing through the lower edge of the louver plate 36 and the lower end of the tube wall of the fluorescent lamp 29 and a horizontal line passing through the lower edge of the louver plate 36 form a light-shielding angle (not shown) of approximately 15 ° and intersect. It has become so.

In the two-lamp luminaire having the above-described structure, the lamp sockets 28 are obliquely mounted on a pair of inclined portions 27a and 27b of a socket mounting base 26 fixed to the reflective ceiling wall 23 of the luminaire main body 21. Thus, these lamp sockets 28 are arranged in a C shape. Therefore, the socket mount 26 and the lamp socket 28 do not line up in the vertical direction, so that the socket mount 26 does not cause the height J (see FIG. 2) of the appliance body 21 to increase, and the lamp socket does not become large. 28 is also oblique, so that all of the protruding length from the oblique portion does not cause the height J of the instrument main body 21 to increase. Therefore, regardless of the height of the socket mount 26, the lamp socket 28 can be brought closer to the reflective ceiling wall 23, and the height of the reflector 34 can be reduced accordingly.

In addition, since the reflector 34 is formed by bending the second reflector B on the back side of the reflector 34, the included angle β between the first reflectors A can be increased. for that reason,
The inclination of the first reflector A is increased, so that the lighting device 30 can be deeply stored behind the reflector 34 and the height of the reflector 34 can be further reduced.

That is, for these reasons, despite the provision of the height K required to obtain the desired light shielding angle α between the lower end of the instrument body 21 and the fluorescent lamp 29,
The height J of the instrument body 21 can be reduced, that is, the entire instrument can be made thinner. And, by this thinning, the material cost of the device main body 21, the packaging cost of the device, and the transportation cost are reduced, so that the total cost can be reduced. Moreover, since the material can be reduced due to the reduction in the thickness of the equipment, the weight of the equipment is reduced, so that the handling is easy and the workability of mounting the equipment on the ceiling can be improved.

The reflectors 35a, 35 of the reflector 34
b has a configuration in which an oblique second reflecting portion B that bends to the back side of the reflector 34 is connected to the upper side of the first reflecting portion A, and the second reflecting portion B is a socket with respect to the tube wall of the fluorescent lamp 29. It is located away from the mount 26 side. Therefore, a work space necessary for attaching and detaching the lamp can be secured between the reflecting plates 35a and 35b and the fluorescent lamp 29.

In the case where the reflector is constituted only by the reflector having the large included angle β without providing the second reflector B, an extension line C of the first reflector A (see FIG. 2) is used as a fluorescent light. Closer to the lamp 29 (this means that the smaller the height of the reflector 34, the larger the included angle β and the smaller the height of the reflector 34 so that the lighting device 30 can be stored deeper behind the reflector 34.
Remarkable. ). However, by bending and providing the second reflecting portion B on the back side of the reflector 34 as described above, it is possible to avoid inconvenience such as supporting the lamp replacement. In addition, the provision of the second reflecting portions B allows the second reflecting portions B
The maximum width E of the reflectors 34 formed between the lamps 29
Can be made smaller than the shortest distance F between the tube walls, so that even when the fluorescent lamp 29 is mounted, the reflector 34 can be attached and detached without hitting them.

Further, the boundary G between the first reflecting portion A and the second reflecting portion B is higher than the height of the center H of the fluorescent lamp 29. For this reason, as shown in FIG. 2, the range δ of the facing surface where the fluorescent lamp 29 faces the first reflecting portion A and the range ε of the facing surface where the lamp 29 faces the reflective side wall 22a (or 22b) are made substantially the same. it can. In other words, a large lamp wall area of the fluorescent lamp 29 capable of allowing light to enter the reflecting portion A opposite to the first reflecting portion A occupying most of the reflecting plates 35a and 35b is secured, and this area is reduced. , Reflective side wall 22
a (or 22b) can be made substantially the same as the tube wall area of the fluorescent lamp 29 capable of making light incident on this side wall. Therefore, it is possible to prevent the brightness of the first reflective portion A, which is easily seen when looking up at the appliance, from being greatly different from the brightness of the reflective side walls 22a, 22b opposed thereto.

The boundary G is the center H of the fluorescent lamp 29.
When the position is below the height position, the opposing surface range δ is considerably smaller than the opposing surface range ε, and the first reflecting portion A is viewed darker than the bright reflecting side walls 22a and 22b. Therefore, the appearance of the device is poor.

Moreover, since the second reflecting portions B are all slanted, the light from the fluorescent lamp 29 incident thereon can be reflected downward. Therefore, the illumination efficiency can be improved as compared with the case where the second reflecting portion is provided vertically (the light cannot be reflected downward in such a configuration of the second reflecting portion).

The present invention is not limited to the above embodiment. For example, the present invention can be implemented not only for multiple lamps but also for a single lamp, and the louver plate 36 may be omitted. Further, the socket mount may also serve as an end of the reflector.
Moreover, the cross-sectional shape of the instrument body is substantially U-shaped,
Although the reflecting side walls on both sides are inclined in the above embodiment, the reflecting side walls may be vertical, and such a mode is included in the concept of the substantially U-shape in the present invention.

[0027]

According to the lighting fixture of the present invention described in detail above, the lighting fixture of the present invention faces the reflecting side wall of the fixture main body and is provided on the back side of the reflector provided obliquely with respect to the lower opening of the fixture main body.
The lighting device is housed, and a lamp socket disposed between the reflective side wall and the reflector is obliquely mounted on a socket mount provided at both ends in the longitudinal direction of the appliance body, and the reflectors are inclined with respect to each other. It has a different diagonal first reflector and a diagonal second reflector connected to the upper side, and the boundary between these reflectors is located above the height position of the center of the lamp supported by the socket. The height of the reflector has become smaller,
The entire fixture can be made thinner, and despite this thinning, the work space required for the operation of attaching and detaching the lamp can be secured between the reflector and the lamp, making it difficult to attach and detach the lamp. And the difference in the amount of light incident on the reflective side wall of the fixture body and the first reflective portion of the reflector facing the same from the lamp is reduced, so that these reflective side walls and the first reflective portion have substantially the same brightness. Light can be reflected by the second reflecting portion in a downward direction.
There is no reduction in instrument efficiency.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a configuration of a multi-lamp lighting device according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a configuration of a main part of the embodiment.

FIG. 3 is a perspective view of the entire multi-lamp lighting apparatus according to the embodiment.

FIG. 4 is a diagram showing a cross section of a configuration of a conventional multi-lamp lighting fixture.

[Explanation of symbols]

21: instrument body, 22a, 22b: reflective side wall, 23c ...
Reflective ceiling wall, 26: socket mount, 28: lamp socket, 29: fluorescent lamp, 30: lighting device, 34:
Reflector, A: first reflector, B: second reflector, G: boundary,
H: Lamp center.

Claims (1)

(57) [Claims] 1. An appliance body having left and right reflective side walls and a horizontal reflective ceiling wall extending between upper ends of these side walls, having a substantially U-shaped cross section in the width direction, and having an open lower surface; A reflector facing the side wall and obliquely provided with respect to the opening, a lighting device housed on the back side of the reflector, and a socket mount provided at both longitudinal ends of the appliance body; A lamp socket mounted obliquely on a mounting table and disposed between the reflective side wall and the reflector; and a lamp supported by the lamp socket, wherein the reflector has an oblique first reflector. When,
An oblique second reflecting portion bent to the back side of the reflector within an angle formed by an extension of the first reflecting portion and a vertical line of the reflecting ceiling wall connected to an upper end of the reflecting portion, A lighting fixture, wherein the boundary between the two reflecting portions is located above the height position at the center of the lamp.