JP4976877B2 - lighting equipment - Google Patents

Description

  The present invention relates to a luminaire using a flat lamp.

  Conventionally, as a lighting fixture, one using an annular arc tube as disclosed in Patent Document 1, for example, is well known. In the lighting fixture using the annular arc tube, it is common to arrange the lighting device and the power connection portion by using the central space surrounded by the arc tube, and this arrangement makes it possible to arrange the lighting device and the power connection portion. It is also possible to prevent shadows from appearing on the translucent cover.

However, the lighting fixture using the annular arc tube requires a large-diameter arc tube in order to ensure a certain level of brightness, and there is a problem that the entire fixture becomes large in the radial direction. There is also a problem that uneven brightness occurs because the central space does not emit light.
JP 2003-197383 A

  This invention is invented in view of the said problem, Comprising: While forming the whole instrument compactly in radial direction, the lighting fixture which can ensure sufficient brightness, without producing a brightness nonuniformity is provided. This is the issue.

In order to solve the above-mentioned problems, the present invention is applied to a box-shaped appliance main body 1 having a flat reflecting surface 1a, a lighting device 2 and a power supply connecting portion 3 housed in the appliance main body 1, and a reflecting surface 1a of the appliance main body 1. a spiral planar ramp 4 mounted on, and and a transparent cover 5 mounted so as to cover the flat lamp 4, the lighting device 2 and the power supply connecting portion 3, the reflection surface 1a of the equipment main body 1 The lighting device 2 is arranged in a region substantially coincident with the projection surface of the flat lamp 4 to be formed, and the lighting device 2 is formed in a rectangular shape when viewed from the projection direction, and adjacent to the long side of the lighting device 2. Thus, the lighting fixture is characterized in that the power supply connection portion 3 is arranged.

In the lighting fixture having the above-described configuration, the spiral flat lamp 4 that can ensure sufficient brightness even with a small diameter and does not cause uneven brightness is used as a light source. The lighting device 2 and the power supply connecting portion 3 are arranged in a region substantially coincident with the projection plane, and the lighting device 2 is formed to have a rectangular shape when viewed from the projection direction. By arranging the power supply connecting portion 3 adjacent to the side, a very compact lighting fixture in the radial direction is realized.

In the invention according to claim 1, the lighting device and the power supply connecting portion are compactly housed in the fixture body, and the entire fixture is formed compact in the radial direction, but sufficient brightness is ensured without causing uneven brightness. There is an effect that can be.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. 1 to 3 show an example lighting apparatus according to an embodiment of the present invention. The lighting fixture of this example includes a fixture main body 1 formed in a box shape, a lighting device 2 accommodated in the fixture main body 1, and a power supply connection portion 3 also accommodated in the fixture main body 1 (see FIG. 3). The flat lamp 4 mounted on the flat reflecting surface 1a formed on the outer surface of the instrument body 1 and the flat lamp 4 and the transmissive cover 5 covering the instrument body 1 constitute a main body. In FIG. 3, the flat lamp 4 is omitted.

  The appliance main body 1 is installed on an appliance installation surface C (see FIG. 1) such as a ceiling, and a flat plate-like attachment in which the opening portion of the main body case 6 opened on one side is fixed to the appliance installation surface C. It is formed by covering with a plate 7. The bottom wall outer surface of the bottomed cylindrical main body case 6 forms the reflection surface 1 a of the instrument main body 1, and the peripheral wall outer surface of the main body case 6 forms the side peripheral surface 1 b of the instrument main body 1. That is, the outer surface of the main body case 6 has a shape in which the side peripheral surface 1b is erected from the peripheral edge of the reflective surface 1a. Further, in the side peripheral surface 1b, a portion on the side close to the reflective surface 1a is defined as a tapered surface 8. A portion extending from the surface 8 toward the side away from the reflecting surface 1a is a vertical surface 9 formed perpendicular to the reflecting surface 1a.

  As shown in FIG. 3, the lighting device 2 is an inverter type that forms a rectangular parallelepiped, and is electrically connected to the power supply connection portion 3 in the instrument main body 1. Both the lighting device 2 and the power supply connecting portion 3 are arranged in the center of the inner surface of the bottom wall that forms the disc shape of the main body case 6, and this lighting device 2 is further installed on the reflection surface 1 a of the instrument main body 1. A pair of lamp sockets 10 are electrically connected. The arrangement of the lighting device 2 and the power supply connection unit 3 will be described in detail again.

  The flat lamp 4 is a fluorescent lamp comprising an arc tube 11 formed in a double spiral shape so that the overall shape is substantially a disc shape, and a pair of caps 12 provided at both ends of the arc tube 11. The base 12 is electrically connected to the lighting device 2 through the lamp socket 10 by electrically connecting the bases 12 to the corresponding lamp socket 10. As shown in FIG. 4, the arc tube 11 is centered on the longitudinal intermediate portion 11a, and the portion extending from the intermediate portion 11a in the longitudinal direction to the other portion is the same. It has a double spiral shape spirally wound in the direction of rotation. As a result, the flat lamp 4 of the present example emits light on the entire surface including the central portion, and ensures sufficient brightness even with a small diameter, for example, as compared with a conventional annular lamp. Can be obtained, and brightness unevenness is not generated.

  The intermediate portion 11 a of the arc tube 11 is formed to be thicker than the other portions, and a portion of the intermediate portion 11 a protrudes to one side of the flat lamp 4, thereby making this protruding portion the coldest point of the arc tube 11. Further, as shown in FIG. 4, between each base 12 and a part of the arc tube 11 positioned inside thereof, and between a part of the arc tube 11 and the other part of the arc tube 11 positioned inside thereof. In between, the filler 13 is filled. Further, the pair of caps 12 are connected by a bridge 14, and the filler 13 and the bridge 14 prevent deformation of the double spiral arc tube 11.

  Two pins 15 are juxtaposed on the end face of each base 12 in a direction perpendicular to the plane on which the arc tube 11 is spirally arranged. The pair of bases 12 are in point-symmetrical positions with the intermediate portion 11a of the arc tube 11 as the center, and the end surfaces of the bases 12 face in opposite directions, so the protruding direction of the pin 15 of one base 12 is The other cap 12 has a direction opposite to the protruding direction of the pin 15. With this arrangement, the entire flat lamp 4 including the base 12 and the pin 15 can be configured most compactly. Further, the clearance between a filament (not shown) disposed between the pair of pins 15 in the arc tube 11 and the inner surface of the arc tube 11 is also maximum under the condition that the arc tube 11 is curved in a spiral shape. Can be secured to the limit.

  A pair of lamp sockets 10 provided on the reflecting surface 1a of the instrument body 1 is as shown in FIG. 5, and a socket body 16 attached and fixed to the reflecting surface 1a, and a cross-sectional circle recessed in the socket body 16 are provided. It comprises a rotating body 18 having a C-shaped cross section that is rotatably housed in a holding portion 17 having a shape. An operation lever 19 protrudes radially outward from the circumferential end of the rotating body 18, and the operation lever 19 protrudes to the outside through a notch 20 provided in the socket body 16. ing. A pair of contacts (not shown) are fixed to the inner peripheral surface of the rotating body 18.

  A pair of support springs 21 (see FIGS. 1 to 3) having a substantially C-shaped cross section are further fixed to the reflecting surface 1 a of the instrument body 1, and when the flat lamp 4 is mounted on the instrument body 1. First, the flat lamp 4 is temporarily held by the support spring 21. Then, as shown in FIG. 5 (a), the rotating body 18 having a C-shaped cross section is positioned so that the internal space communicates with the notch portion 20 of the socket body 16, and then each base is passed through the notch portion 20. Twelve pairs of pins 15 are inserted into the rotating body 18. Thereafter, each rotating body 18 is rotated by the operation lever 19 to the state shown in FIG. 5B, and the pair of pins 15 are held in a state of being in electrical contact with the pair of contacts of each rotating body 18. In addition, what is necessary is just to perform the reverse procedure to the above in order to remove the flat lamp 4 from each lamp socket 10.

  The transmission cover 5 includes a disc-shaped bottom wall portion 5a, a cylindrical peripheral wall portion 5b extending in a substantially orthogonal direction from the entire periphery of the bottom wall portion 5a, and a further tip of the peripheral wall portion 5b. The main body is composed of a flange-shaped attachment portion 5c extending inwardly from the edge. On the side peripheral surface 1b of the instrument body 1, a spring member 22 formed so that the upper end portion protrudes by curving outward is disposed. The spring members 22 are provided at a plurality of locations (three locations in the illustrated example) at equal intervals in the circumferential direction, and the protruding portions of the spring members 22 engage the attachment portions 5 c of the transmission cover 5. The locking portion 22a.

  Each spring member 22 is arranged to bend when a force is applied to the locking portion 22a from the outside to move the locking portion 22a inward. Accordingly, the transmissive cover 5 is covered from the reflective surface 1a side with the flat lamp 4 mounted, and the attaching portion 5c of the transmissive cover 5 is pressed against the engaging portions 22a of the spring members 22 to push in the engaging portions. 22a moves inward. Then, the locking portion 22a is elastically restored outward at a predetermined mounting location where the mounting portion 5c is further pushed in and over the locking portion 22a. The transmissive cover 5 is attached to the instrument body 1 at the mounting location.

  FIG. 1 shows a state in which a flat lamp 4 and a transmission cover 5 are attached to the instrument body 1. The taper surface 8 formed on the side peripheral surface 1b of the instrument body 1 is inclined so as to expand in a direction away from the reflection surface 1a (that is, the flat lamp 4 attached thereto). Between the inner surface of the peripheral wall part 5b of the transmission cover 5, it provides so that a predetermined clearance may be formed over the perimeter. This gap communicates with a gap formed between the reflecting surface 1a of the instrument body 1 and the inner surface of the bottom wall portion 5a of the transmission cover 5, and direct light emitted from the end of the flat lamp 4 is transmitted through this gap. The entire surface of the peripheral wall 5b of the transmission cover 5 is irradiated.

  The reflection surface 1a of the fixture body 1 is formed to have a slightly larger diameter than the projection surface of the flat lamp 4 with respect to the reflection surface 1a. Therefore, of the direct light emitted from the end of the flat lamp 4, the direct light that hits a region outside the projection surface of the flat lamp 4 on the reflecting surface 1 a illuminates the outer peripheral edge portion of the bottom wall portion 5 a by reflection. Become. The outer peripheral edge portion of the bottom wall portion 5a is a portion that is difficult to receive direct light from the flat lamp 4 and easily causes a shadow. However, the reflected light can compensate for the shadow and shine brightly.

  The arrangement of the lighting device 2 and the power supply connection portion 3 in the appliance main body 1 are both provided so as to be within an area substantially coincident with the projection surface of the flat lamp 4 on the reflection surface 1a. This region is a circular region that includes the projection surface and is formed to have a slightly larger diameter than the projection surface. The lighting device 2 that forms a rectangle when viewed from the projection direction is arranged at the center of the lighting device 2. The lighting device 2 and the power supply connection portion 3 are accommodated in the region by arranging the power supply connection portion 3 adjacent to the long piece side of the device 2.

  Further, as shown in FIG. 3 and the like, the mounting plate 7 of the instrument body 1 is provided with a lead-in hole 23 for introducing a power cord (not shown) at a location in the above-described region and facing the power connection portion 3. ing. The power cord introduced into the main body case 6 through the lead-in hole 23 is connected to the power supply connecting portion 3 below the lead-in hole 23.

  That is, in the luminaire of this example, by using the flat lamp 4 as the light source, it is possible to ensure sufficient brightness and prevent luminance unevenness while forming the light source itself with a small diameter. And, by making the structure in which the installation space of the lighting device 2, the power supply connection portion 3 and the power cord is efficiently accommodated in an area substantially coincident with the projection surface of the flat lamp 4 having a small diameter, the entire instrument can be obtained. It can be configured to have a small diameter.

  Note that the region may be provided so as to coincide with the projection surface of the flat lamp 4. In this case, an installation space for the lighting device 2, the power supply connection portion 3, and the power cord is accommodated in the projection surface of the flat lamp 4.

  What is shown in FIG. 6 is an example at the time of using the above-mentioned rectangular parallelepiped lighting apparatus 2 for another lighting fixture. The example of FIG. 6A is an example in which the lighting device 2 is arranged in parallel with a plurality of arc tubes 30 arranged in parallel, and is fixed to an appliance installation surface C composed of a wall side surface. The example of FIG. 6B is an example in which the lighting device 2 is arranged so as to be orthogonal to a plurality of light emitting tubes 30 arranged in parallel, and is suspended from above via a power cord 40.

  Next, another example of the lighting fixture in the embodiment of the present invention will be described with reference to FIG. 7, but the description of the same configuration as the above-described example will be omitted. In this example, the lighting device 2 is formed in a donut shape having a through hole 50 in the center, and the power supply connection portion 3 is disposed in the through hole 50.

  Although not shown, in this example, the lead-in hole 23 of the instrument body 1 is positioned at the center of the projection surface of the flat lamp 4. That is, it is possible to make a structure in which the installation space of the lighting device 2, the power supply connecting portion 3 and the power cord is efficiently stored in a circular region substantially coincident with the projection surface of the flat lamp 4 having a small diameter. The entire instrument can be configured to have a small diameter. In this example, the upper region may be provided so as to coincide with the projection surface of the flat lamp 4. In this case, the lighting device 2 is positioned on the outer peripheral side in the projection plane of the flat lamp 4, and the power supply connection portion 3 is positioned in the center in the projection plane.

It is sectional drawing of the example lighting fixture in embodiment of this invention. It is an exploded perspective view same as the above. It is a partially broken exploded perspective view of the state except a flat lamp same as the above. The flat lamp | ramp same as the above is shown, (a) is a front view, (b) is a side view. It is explanatory drawing of a lamp socket same as the above, (a) shows the state before mounting | wearing with a flat lamp, (b) has shown the state after mounting | wearing. (A), (b) is explanatory drawing which shows the example at the time of using a rectangular parallelepiped lighting apparatus for another lighting fixture. It is explanatory drawing of the lighting fixture of the other example in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Apparatus main body 1a Reflective surface 2 Lighting device 3 Power supply connection part 4 Plane lamp 5 Transmission cover

Claims (1)

A box-shaped fixture body with a flat reflective surface, a lighting device and a power supply connection part housed in the fixture body, a spiral flat lamp attached to the reflective surface of the fixture body, and a flat lamp mounted The lighting device and the power supply connection portion are arranged in a region substantially coincident with the projection surface of the flat lamp formed on the reflection surface of the fixture body, and the lighting device is arranged in the projection direction. The lighting apparatus is characterized in that it is formed in a rectangular shape when viewed from above, and a power supply connecting portion is disposed adjacent to the long side of the lighting device.

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