JPH0512803B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an indirect lighting fixture that once reflects a luminous flux emitted from a light source by a reflective mirror and then provides illumination with the reflected light.

[Conventional technology]

Traditionally, this type of indirect lighting equipment has been
As shown in the figure, a reflecting shade 2 which is open toward the opening of the instrument body 1 is placed inside the instrument body 1 whose bottom surface is open, and a light source 3 is emitted from the light source 3 arranged inside the opening rim of the instrument body 1. A device is provided in which the emitted light beam is once reflected by a reflecting shaft 2 and then the reflected light is taken out from an opening in the device body 1. That is, a recess 5 is formed at the opening edge of the instrument body 1, and is surrounded by the inner circumferential surface of the instrument body 1 and a light-shielding frame 4 disposed around the opening edge of the instrument body 1, and whose upper surface is open. A light source 3 is disposed within this recess 5, and the light beam from the light source 3 is blocked from the sides and downward. The light beam radiated upward through the opening of the recess 5 is reflected downward by the reflection shaft 2, and the reflected light is radiated downward from the opening of the instrument body 1.

[Problem to be solved by the invention]

By the way, as the light source 3, as shown in FIG. 5, a single-cap type fluorescent lamp is used, in which the internal spaces of a pair of straight tubes are communicated at one end of the straight tubes, and a cap is provided at the other end of each straight tube. If used, the following problems arise when replacing the light source 3. That is, in order to make the light source 3 replaceable, the socket 6 for receiving the cap of the light source 3 is attached to the main body 1 of the device so as to be rotatable around a rotation axis in a plane perpendicular to the longitudinal direction of the light source 3. It is installed. Therefore, the other end of the light source 3 rotates around one end in the longitudinal direction. Here, as shown by the arrow in FIG. 6a, the tip of the light source 3 may be pulled out downward to attach and detach the light source 3 to the socket 6, or as shown by the arrow in FIG. It is conceivable that the light source 3 can be attached to and removed from the socket 6 by pulling out the tip of the light source 3 to the side, but in either configuration, if you try to pull out the light source 3, it will hit the light shielding frame 4. The light source 3 cannot be replaced unless it is removed. That is, the work of replacing the light source 3 includes the work of attaching and detaching the light shielding frame 4, which poses a problem of poor workability. The present invention aims to solve the above-mentioned problems, and aims to provide an indirect lighting fixture that eliminates the need to remove a light-shielding frame and the like when replacing a light source, and improves workability.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention includes a device main body that is formed in a box shape with an open bottom surface and has a recess that opens upward on the inner peripheral side of the opening; A reflector disposed above the opening surface of the recess, a light source having a cap in one place and disposed within the recess, and a cap of the light source disposed within the recess are connected. A space is provided between the opening edge of the recess and the lower edge of the reflector, and the internal spaces of the pair of straight tubes in which the light sources are parallel to each other are communicated at one end, and both straight tubes are connected at one end. A fluorescent lamp having a cap at the other end of the tube, which can be freely moved in and out between a position where the reflector projects into the chamber and a position where it is housed in the recess through the above-mentioned space. A socket supporting the ends of a pair of straight pipes is pivotally attached to the main body of the instrument so as to be rotatable around a rotation axis parallel to the direction in which both straight pipes are arranged. The substantially central portion faces the substantially central portion of the reflective sheath in a direction perpendicular to the arrangement direction.

[Effect]

According to the above configuration, the light source enters and exits through the gap formed between the opening edge of the recess that accommodates the light source and the opening edge of the reflective shade so that the light beam emitted from the light source is not viewed directly. The light source can be replaced with the light source protruding into the reflection chamber, and unlike conventional configurations, there is no need to remove the light shielding frame when replacing the light source, which improves work efficiency.
Further, the fluorescent lamp is formed in a shape in which the internal spaces of a pair of straight tubes whose light sources are parallel to each other are connected at one end, and a base is provided at the other end of both straight tubes,
A socket supporting the ends of the pair of straight pipes is provided in the arrangement direction of the pair of straight pipes so as to be able to move in and out between the position where the reflector protrudes into the recess and the position where it is accommodated in the recess through the above-mentioned gap. It is rotatably attached to the main body of the instrument so as to be rotatable around a rotation axis parallel to the axis, and the approximately central portion of both straight pipes in the arrangement direction is directed toward the approximately central portion of the reflective receptacle in a direction perpendicular to the arrangement direction. By doing so, the reflective surface of the reflector is positioned in the direction in which the luminous flux increases in the light distribution curve of the light source, which has the advantage of increasing the utilization efficiency of the luminous flux emitted from the light source.

【Example】

As shown in FIG. 2, the instrument main body 1 is formed into a box shape with an opening at the bottom. As shown in FIG. 1, a flange 7 is provided around the entire opening of the instrument body 1.
will be provided. The appliance body 1 is suspended via hanging bolts 8 fixed to a structural material such as a ceiling slab, and is placed on the ceiling with a flange 7 overlapping the lower surface of the periphery of a mounting hole 10 provided in a ceiling material 9. be done. Around the opening of the instrument body 1, a light-shielding frame 4 having a substantially L-shaped cross section is disposed around the entire circumference, with a part of the horizontal piece overlapping the lower surface of the flange 7, and the light-shielding frame 4 has a cross section that overlaps the inner peripheral surface of the instrument body 1 and the light-shielding frame. A recess 5 surrounded by 4 and having an open upper surface is formed. The light shielding frame 4 is attached to the main body 1 by a mounting spring 11 made of a scissor spring formed in a substantially V shape.
is attached to. That is, the lower end of the attachment spring 11 is fixed to the light-shielding frame 4, and both legs come into elastic contact with a pair of holding fittings 12 fixed to the instrument body 1, respectively. Both holding fittings 12 are spaced apart, and the distance between the legs of the mounting spring 11 is regulated by both holding fittings 12. When the light shielding frame 4 is pulled downward, when the light shielding frame 4 moves downward by a predetermined amount, the locking portions 13 provided at the tips of both legs of the mounting spring 11 are locked to the holding metal fittings 12, and the light shielding frame is closed. 4 is prevented from falling off. Further, when the light shielding frame 4 is moved upward from this state, the mounting spring 11 is held by the holding fitting 12 by increasing the opening angle of the legs. Inside the instrument main body 1, a reflecting cage 2 whose lower surface is open is disposed. Reflector 2 is the instrument body 1
It is fixed to the instrument main body 1 via a mounting bracket 20 fixed to the inner peripheral surface of the instrument body 1. The opening edge of the reflective shank 2 is located above the opening surface of the recess 5, and a gap is formed between the upper end of the vertical piece of the light-shielding frame 4 and the lower end of the reflective shank 2. In the recess 5 provided on each side of the opening edge of the device body 1, a socket mount 14 and a spring mount 15 are installed.
and are spaced apart in the direction along each side of the instrument body 1
is fixed. The socket mount 14 and the spring mount 15 are each fixed to the inner circumferential surface of the peripheral wall of the instrument body 1.
The distal end surface with 5 is an inclined surface that moves away from the inner circumferential surface of the instrument main body 1 toward the bottom, and is formed on the same plane. A central piece of a holding frame 16 formed in a substantially U-shape is fixed to the distal end surface of the socket mounting base 14, and the socket 6 is held between both legs of the holding frame 16. The socket 6 is mounted so as to be rotatable around a rotation shaft 17 parallel to the longitudinal direction of the central piece of the holding frame 16. The light source 3 connected to the socket 6 is, as shown in FIG. In the lamp, both straight tubes are spaced apart from each other in the direction of the rotation axis 17. The end of the light source 3 opposite to the socket 6 is held by a support spring 18 fixed to the front end surface of a spring mount 15. Further, a lighting circuit component 21 such as a ballast necessary for lighting the light source 3 is arranged in a space between the inner circumferential surface of the appliance main body 1 and the outer circumferential surface of the reflector 2. According to the above configuration, the light beam emitted from the light source 3 is radiated through the space between the opening edge of the reflection frame 2 and the upper end of the vertical piece of the light-shielding frame 4, and almost all of the light beam is reflected. After being reflected by the beam 2, the light is radiated downward through an opening surrounded by a light-shielding frame 4. In this way, indirect lighting can be achieved.
Here, the light source 3 having the above configuration has a light distribution curve d as shown in FIG. Therefore, the light from the light source 3 is effectively used. Moreover, the above arrangement also makes the brightness distribution on the reflective surface of the reflector 2 uniform. On the other hand, when replacing the light source 3, it is sufficient to pull out the light source 3 into the instrument main body 1 as shown by the dashed line in FIG. That is, when the light source 3 is removed from the support spring 18 and the socket 6 is rotated relative to the holding frame 16, the light source 3 is moved between the reflector 2 and the light shielding frame 4.
It is pulled out into the instrument main body 1 through. By inserting and removing the light source 3 from the socket 6 in this state, the light source 3 can be easily replaced.

【Effect of the invention】

As described above, the present invention includes a device main body that is formed in a box shape with an open bottom surface and has a recess that opens upward on the inner peripheral side of the opening periphery; The light source includes a reflector disposed above the surface, a light source having a base in one place and disposed within the recess, and a socket disposed within the recess to which the base of the light source is connected. A gap is provided between the opening edge of the recess and the lower end edge of the reflector, and the internal spaces of the pair of straight tubes, in which the light sources are parallel to each other, are communicated at one end, and the other ends of both straight tubes are connected. It is a fluorescent lamp formed in a shape with a base provided in the above-mentioned space.
A socket supporting the ends of the pair of straight pipes is arranged parallel to the arrangement direction of the pair of straight pipes so that the reflector can move in and out between the position where it protrudes into the recess and the position where it is housed in the recess. It is rotatably attached to the main body of the instrument so as to be rotatable around a rotation axis, and the approximately central portion of both straight pipes in the arrangement direction is directed toward the approximately central portion of the reflecting shade in a direction perpendicular to the arrangement direction. Therefore, the light source can be replaced with the light source protruding inside the reflector, and unlike conventional configurations, there is no need to remove the light shielding frame when replacing the light source, which has the advantage of improving work efficiency. Moreover, the reflective surface of the reflective receptacle is located in the direction in which the light flux increases in the orientation curve of the light source, which has the advantage of increasing the utilization efficiency of the light flux emitted from the light source.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG.
The figure is an external perspective view of the same as above, FIG. 3 is an explanatory diagram of the operation of the light source used in the above, and FIG. 4 is a sectional view showing a conventional example.
FIG. 5 is a perspective view showing an example of a light source used in the above,
FIGS. 6a and 6b are sectional views of essential parts of the same as above, respectively. 1... Instrument body, 2... Reflector, 3... Light source, 5... Recess, 6... Socket, 17... Rotation axis.

Claims (1)

[Claims] 1. A device body formed into a box shape with an open bottom and a recess that opens upward on the inner periphery of the opening; a light source disposed within the recess, and a socket to which the base of the light source disposed within the recess is connected; A space is formed between the opening edge and the lower end edge of the reflector, and the light source connects the internal spaces of the pair of straight tubes parallel to each other at one end and connects the light source to the other end of both straight tubes. The fluorescent lamp is formed into a shape with a base, and includes a pair of straight tubes so that the reflector can move in and out between the position where it projects into the cavity and the position where it is housed in the recess through the above-mentioned space. A socket supporting the ends of the straight pipes is rotatably attached to the main body of the instrument so as to be rotatable around a rotation axis parallel to the arrangement direction of the pair of straight pipes. An indirect lighting device characterized in that the reflection is directed toward substantially the center of the shaft in a direction perpendicular to the direction.