JP4492478B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture including an annular fluorescent lamp and a light control member facing the annular fluorescent lamp.

  Conventionally, in a lighting fixture in which a large number of spaced light control pieces, such as baffles having baffle pieces, are arranged to face the lamp, the lamp cap supported by the lamp socket faces the region between the baffle pieces. The technique made to do is known (for example, refer patent document 1).

  Further, in a circular fluorescent lamp, high luminous efficiency is obtained by regulating the mercury vapor pressure in the bulb (translucent discharge vessel) to a substantially optimum value by the temperature of the coldest part of the bulb. For this purpose, the mount height of the second electrode provided at the other end of the bulb is made larger than the mount height of the first electrode provided at the one end of the bulb so as to obtain the mount height of the second electrode. A technique for forming the coldest portion where the tube wall temperature is lowest at the other end of the corresponding valve is known (see, for example, Patent Document 2).

The mount of the first electrode is called a low mount, and the mount of the second electrode is called a high mount. The brightness from the low-end side valve end to the first electrode is relatively bright compared to the brightness from the high-mount side valve end to the second electrode. It is also known that the brightness from the bulb end on the high mount side to the second electrode is relatively dark compared to the brightness from the bulb end on the low mount side to the first electrode.
Japanese Utility Model Publication No. 6-50142 (Claim 1, FIGS. 1-2) JP 2002-237275 A (paragraphs 0008, 0030, FIG. 2)

  A light control body having a large number of light control pieces arranged to face a lamp is used to obtain a predetermined light shielding angle by the light control pieces. In a lighting fixture equipped with this type of light control body, when the entire lamp cap faces the area between one light control piece, the size of this one light control piece area is set to the other light control piece. By making it larger than the space area, it is possible to improve the unevenness of the brightness of the area between the one light control piece opposed to the entire base and the brightness of the other light control piece areas. However, for this purpose, the area between the one light control pieces opposed to the entire base must be made considerably large, and thus unevenness of the light control piece intervals tends to be noticeable, which is not preferable in terms of the appearance of the instrument. In addition, the light control function by the light control piece that partitions the region between the one light control pieces facing the entire base, for example, the function of creating a predetermined light blocking angle, is greatly different from the light blocking angle formed by other light control pieces. Therefore, it is not preferable as a function of the light control member.

  Therefore, if it is configured so that there is no extreme difference in the size of the area between the light control pieces, one light control piece faces the base as exemplified in Patent Document 1.

  In such a luminaire of Patent Document 1, the area between the baffle pieces where the base of the lamp supported by the socket faces is darkened by the presence of the base and the socket, and the base and the socket are arranged in the dark area. The area between other baffle pieces that are not present becomes relatively bright. That is, the brightness of each region between the baffle pieces of the baffle becomes non-uniform, which is not preferable.

  Further, Patent Document 2 does not describe how the baffle is arranged with respect to the annular fluorescent lamp. In the arrangement of the baffle with respect to the ring-shaped fluorescent lamp, even when the technique of Patent Document 1 is applied, the area between the baffle pieces where the base of the ring-shaped fluorescent lamp is arranged is relatively smaller than the area between the other baffle pieces. Get dark.

  Therefore, the present inventor made a prototype of a lighting fixture having a configuration in which a single baffle piece is opposed to the center of the base of the ring-shaped fluorescent lamp, and the base is arranged over a region between two adjacent baffle pieces. In this case, the brightness difference due to the base was somewhat improved, but it was not sufficient, and it was found that there was room for improvement.

  When an annular fluorescent lamp that optimally regulates the mercury vapor pressure in the lamp by the coldest part formed in a part of the bulb is used as the annular fluorescent lamp, the effect of the coldest part of the bulb is added, Since the brightness of each area between the baffle pieces facing each other becomes uneven, it is found that there is room for further improvement.

  That is, the coldest part is on the high mount electrode side, and the brightness from the bulb end on the coldest part side to the second electrode is the brightness from the bulb end on the low mount electrode side to the first electrode. I have already mentioned that it is relatively darker than that. And in the said arrangement | positioning, the area | region between one baffle piece which the half site | part of a nozzle | cap | die opposes the darkest coldest part is the area | region between baffle pieces which the other half site | part adjacent to this and the bright low-mount side oppose. On the other hand, since it was relatively dark, it was found that uneven brightness when the device was visually recognized was conspicuous.

  The objective of this invention is providing the lighting fixture which can improve the nonuniformity of the brightness of the area | region between the light control pieces of the light control body resulting from a nozzle | cap | die.

  In order to solve the above-mentioned problems, the invention of claim 1 is an instrument main body; an annular fluorescent lamp attached to the instrument main body, and a base is mounted over both ends of the annular bulb, and one end of the bulb A ring-shaped fluorescent lamp in which the second electrode mount height provided at the other end of the bulb is larger than the mount height of the first electrode provided in the lamp; and a plurality of light control pieces arranged at intervals. A light control body attached to the fixture main body so as to face the fluorescent lamp, and one light control piece facing the base among the light control pieces is from the center of the base. And a light control member arranged close to the second electrode side.

  In the present invention and the following invention, the bulb refers to a light-transmitting discharge vessel, and both ends of the bulb are generally closed by end plate portions constituted by stems. The valve being tubular includes not only a complete ring shape and a shape lacking a part of the ring, but also a ring shape of a square, a ring, an ellipse or the like. And when it is the cyclic | annular form which one part lacked, the nozzle | cap | die made from a synthetic resin which covers the lack part can be mounted | worn over the both ends of a valve | bulb. The base is formed in a straight tube shape or a curved tube shape according to the annular shape of the valve.

  Further, in the present invention and the following invention, the pair of electrodes are individually sealed at both ends of the bulb to cause mercury vapor discharge between them, and are known such as a filament electrode and a ceramic electrode. An electrode can be used. The filament electrode has a structure in which an electron emitting material is applied to a tungsten double coil or triple coil, and both ends of the filament electrode airtightly penetrate the end plate portion of the bulb. Ceramic electrodes, for example, thermionic emission made of composite ceramics mainly composed of oxides of alkaline earth elements and transition metal elements in an electrically conductive container with an opening, and the surfaces are covered with transition metal elements or nitrides It has a structure containing a substance, and is supported at the tip of one lead-in wire.

  Further, in the present invention and the following invention, the light control body is a baffle or a louver or the like, and is provided to face the fluorescent lamp so as to obtain a predetermined light shielding angle or outside the predetermined range. It functions to block direct light from the fluorescent lamp. The light control pieces are preferably arranged at equal intervals, and the distance between adjacent light control pieces is preferably larger than the total length of the base, for example. In addition, even if the light control body has an integrated structure in which a large number of light control pieces are integrally formed on a frame-like portion formed in a ring shape in accordance with the size of the circular fluorescent lamp, a large number of light control pieces A plurality of light control elements having the above may be arranged continuously in a ring shape. As a means for attaching the light control body to the instrument body, it is possible to employ screwing or a structure in which a claw provided on the light control body is hooked on a nail receiver such as a slit-like hole provided in the instrument body or the like.

  In the present invention, the electrode mount height refers to the distance from the center axis of the electrode to the outer surface of the end plate portion of the valve to which the electrode is attached, when the electrode is a filament electrode. Is made of a ceramic electrode, it indicates the distance from the surface of the thermionic emission material to the outer surface of the end plate portion of the bulb to which this electrode is attached. And the mount height of a pair of electrode should just be provided with the difference of predetermined relative height. To increase the mounting height of one of the electrodes, for example, the length of the lead-in line in the bulb is increased, or the height of the stem that supports the penetrating air through the lead-in line is increased. Or by combining these two.

  Further, in the present invention, the center of the base refers to a position that is exactly ½ of the total length of the base. In the present invention, the size of the one light control piece facing the base toward the second electrode side, that is, the high mount side from the base of the base is adjacent to the light control piece facing the base. What is necessary is just to determine so that the brightness of the area between light control pieces may become substantially the same.

  In the first aspect of the invention, since the single light control piece opposed to the base of the annular fluorescent lamp is moved closer to the second electrode side of the fluorescent lamp than the center of the base, the single light control piece is The opposing area of a portion outside the coldest part of the bulb with respect to one of the regions between the light control pieces adjacent to the boundary is increased, the brightness of this region is improved, and the first electrode of the fluorescent lamp The opposed area of the bulb on the side where the is sealed is reduced, and the brightness of this region is lowered. As a result, the uneven brightness of each of the regions between the light control pieces adjacent to the light control piece as a boundary can be made inconspicuous.

  In order to solve the above-mentioned problems, the invention of claim 2 includes an instrument main body; an annular fluorescent lamp attached to the instrument main body; and a large number of light control pieces arranged at intervals. A light control body attached to the instrument body so that the light control piece is opposed to the base of the annular fluorescent lamp, and the light control piece is attached to the fixture body. And a light control body formed such that each of the spaces between the light control pieces adjacent to the boundary is larger than the space between the other light control piece regions positioned so as to sandwich the pair of light control piece regions. is doing.

  In the present invention, the annular fluorescent lamp may be either a fluorescent lamp that regulates the mercury vapor pressure at the coldest part or a fluorescent lamp that does not have the coldest part that regulates the mercury vapor pressure. Further, in the present invention, the arrangement of the single light control piece facing the base is not particularly limited. However, when using an annular fluorescent lamp that regulates the mercury vapor pressure at the coldest part, the high-mount-side electrode that forms the coldest part from the center of the die is equipped with a single light control piece facing the die. It is more preferable to arrange it close to (the second electrode) in order to improve uneven brightness in the area between the light control pieces adjacent to the single light control piece.

  According to the second aspect of the present invention, since the base is arranged so as to extend over the region between the two light control pieces adjacent to each other with the single light control piece facing the base, the brightness of the region between the two light control pieces is set. The decrease in height is suppressed. In addition, the distance between two light control pieces adjacent to each other with a single light control piece as a boundary is larger than the space between other light control pieces adjacent to the two light control pieces. . For this reason, as the area facing the bulb in the region between the two light control pieces adjacent to each other with the single light control piece facing the base increased, the base facing the region between the two light control pieces Can reduce the decrease in brightness. Therefore, the area between the two light control pieces adjacent to each other with the one light control piece facing the base as a boundary is suppressed relative to the other light control piece region not facing the base. As a result, uneven brightness in the areas between the light control pieces of the light control body can be made inconspicuous.

  According to the lighting fixture of the first aspect of the present invention, the base is caused by the arrangement of the single light control piece of the light control body facing the base of the annular fluorescent lamp having the coldest part for improving the efficiency. Therefore, it is possible to improve the uneven brightness of the area between the light control pieces of the light control body.

  According to the lighting fixture of the second aspect of the present invention, the distance between the two light control pieces adjacent to the light control piece of the light control body opposed to the base of the annular fluorescent lamp is adjacent to these. By making it larger than the interval between the other light control piece regions, it is possible to improve the non-uniform brightness of the region between the light control pieces of the light control body due to the base.

  A first embodiment of the present invention will be described with reference to FIGS.

  Reference numeral 1 in FIG. 1 indicates the system ceiling. This system ceiling 1 is constructed by arranging ceiling frames (not shown) in a lattice shape, and mainly mounting a ceiling panel 2 having a shape corresponding to this space in each of the partitioned square space portions, and an arbitrary rectangular space portion. It is formed by mounting the lighting fixture 3 according to the present embodiment.

  As shown in FIGS. 2 and 4, the lighting fixture 3 includes a fixture body 11, an annular fluorescent lamp 21, and a baffle 41 as a light control body, for example.

  An instrument main body 11 having a square shape in plan view, for example, a square, includes a main body frame 12 having a central portion opened in a regular square shape, and a center plate 13 attached to the main body frame 12 and covering the opening of the central portion. Have. As shown in FIG. 1, nothing may be attached to the center plate 13, or various sensors such as smoke detectors and devices (not shown) such as emergency lights may be attached. In the main body frame 12, each of the side walls 12a (only two side walls parallel to each other are shown in FIG. 4) and the center plate 13 are disposed, and the reflecting plates 14 (only two are representative in FIG. 4). Is attached). End faces of the reflectors 14 adjacent to each other at right angles are continuous with each other at the four corners of the main body frame 12.

  The fluorescent lamp 21 has a square ring shape corresponding to the outer shape of the instrument body 11. For example, the fluorescent lamp 21 includes a bulb 22 having a tube diameter of 16 mm, which is bent into a square ring having a length and width of 500 mm, and a synthetic resin base 23 which is attached to both ends of the bulb 22 which are close to each other. By using this fluorescent lamp 21, it is possible to reduce the thickness of the lighting fixture 3 mounted on the ceiling of the room. As will be described later, the base 23 has a base pin (not shown) connected to an introduction line that supports the electrode, and a lamp socket S (see FIG. 2) is connected to the base pin. Yes. The length of the base 23 is (40-50) mm.

  The fluorescent lamp 21 is supported by a plurality of lamp holders (not shown) attached to the ceiling wall of the main body frame 12, and is located directly below the reflecting plate 14 and is built in the instrument main body 11. In this case, the fluorescent lamp 21 disposed between the side wall 12a of the main body frame 12 and the center plate 13 has a base 23 parallel to one side wall 12a of the main body frame 12 and substantially the center in the longitudinal direction of the side wall 12a. Built in.

  As shown in FIG. 5, both ends of the valve 22 are arranged so as to face each other, and a stem 24 or a stem 25 is sealed to them. The pair of stems 24 and 25 is formed of a flare stem, and a pinch seal portion 24a or 25a is formed at one end of the stem glass tube, and a flare portion 24b or 25b is formed at the other end. A pair of lead wires 26 penetrates the pinch seal portion 24a of the stem 24 in an airtight manner. Similarly, a pair of lead wires 27 penetrates the pinch seal portion 25a of the stem 25 in an airtight manner.

  The stems 24 and 25 are provided with narrow tubes 28 or 29. One thin tube 28 is disposed at one end of the valve 22, and the other thin tube 29 is disposed at the other end of the valve 22. These capillaries 28 and 29 are welded by forming an opening in the vicinity of the pinch seal portion 24a or 25a at the back of the flare portion 24b or 25b, and the tip-off portion 28a or 29a having an airtight tip at the tip. It is formed and protrudes from the stem 24 or 25 to the outside. The thin tubes 28 and 29 are communicated with the valve 22 through the openings.

  By connecting both ends of the first electrode 30 made of a filament electrode to the tips of the pair of lead wires 26, the electrode 30 is sealed on one end side of the bulb 22. Similarly, by connecting both ends of the second electrode 31 made of a filament electrode to the tips of the other pair of lead wires 27, the electrode 31 is sealed on the other end side of the bulb 22.

  The stem 24, the narrow tube 28, and the first electrode 30 constitute a low mount 32. Similarly, the stem 25, the thin tube 29, and the second electrode 31 constitute a high mount 33. These mounts 32 and 33 are provided so as to protrude from the end of the base 23. The mount height A of the high mount 33 having the second electrode 31 is larger than the mount height B of the low mount 32 having the first electrode 30. Further, the tube wall at the end of the bulb 22 facing the stem 25 of the high mount 33 forms the coldest portion 22 a where the tube wall temperature is lowest when the fluorescent lamp 21 is lit.

  The baffle 41 is detachably attached to the instrument body 11 so as to face the fluorescent lamp 21 by attachment means (not shown). As shown in FIGS. 1 and 2, the baffle 41 is formed by arranging, for example, four baffle elements 42 as a light control element in a square annular shape.

  The baffle element 42 has the same configuration, and is formed, for example, by attaching a baffle piece 44 as a large number of light control pieces extending in the short direction of the frame 43 to a long rectangular frame 43. The baffle pieces 44 are parallel to each other and provided at equal intervals. These baffle pieces 44 are opposed directly below the bulb with a positional relationship orthogonal to the bulb 22 of the fluorescent lamp 21. The baffle 41 obtains a predetermined light shielding angle by a large number of baffle pieces 44 that the baffle 41 has, and this light shielding angle is defined by the size of the mutual interval between the baffle pieces 44. In addition, it is preferable that the baffle pieces 44 are equally spaced from each other so that the baffle pieces 44 can have the same light shielding angle and the appearance of the lighting fixture 23 is good, but the baffle pieces 44 are not evenly spaced. It is also possible to provide.

  In a state where the four baffle elements 42 are arranged at predetermined positions of the instrument body 11 as shown in FIG. 2, one baffle piece 42 (reference numeral 44a for identification with other baffle pieces) is provided. Is opposed to the base 23. The baffle piece 44a is provided so as to be positioned at the longitudinal center of one side wall 12a. The other baffle pieces 44 are arranged at equal distances based on the baffle piece 44a. The baffle pieces 44 that the other baffle elements 42 have are also arranged at the same distance.

  In one baffle element 42 having a baffle piece 44 a facing the base 23, the baffle piece 44 a is disposed directly below the base 23, but the other baffle pieces 44 are projected below the base 23. Arranged out of the area. As shown in FIGS. 2 to 4, the baffle piece 44 a is arranged closer to the second electrode 31 side than the center C, that is, the high mantle 33 side with respect to the center C of the base 23. The alignment dimension D in this case is set so that the brightness of the areas between the baffle pieces (areas between the light control pieces) E1 and E2 adjacent to the baffle piece 44a is the same. This shift dimension D can be obtained from the results of various experiments. In the present specification, the brightness of the area between the baffles (area between the light control pieces) refers to the brightness brought about by the direct light from the fluorescent lamp 21 and the reflected light reflected by the reflecting plate 14.

  The luminaire 3 having the above-described configuration has a configuration in which the entire base 23 of the fluorescent lamp 21 does not face one of the regions between the baffle pieces 44 of the baffle 41 facing the annular fluorescent lamp 21. . For this reason, it can suppress that the said one baffle piece area | region becomes darker than another area | region.

  Further, the luminaire 3 has a configuration in which a single baffle piece 44 a facing the base 23 is moved closer to the second electrode 31 side of the fluorescent lamp 21 than the center C of the base 23. As a result, one of the baffle piece regions E1 and E2 adjacent to each other with the baffle piece 44a facing the base 23 as a boundary, specifically, the region B1 between the baffle pieces on the near side is the region E1. The facing area of the base 23 to the front surface decreases, and the facing area of the portion of the bulb 22 that is out of the coldest part 22a increases. Therefore, although the coldest part 22a faces this baffle piece area | region E1, the brightness of this area | region E1 is improved.

  In the other baffle piece region E2, the facing area of the base 23 to the region E2 increases, and the first electrode 30 of the fluorescent lamp 21 is sealed on the low mount 32 side. The opposing area of the valve 22 is reduced. Therefore, the brightness of the baffle piece inter-region E2 is lowered.

  Therefore, for the reasons described above, the brightness of each of the baffle piece areas E1 and E2 adjacent to each other with the baffle piece 44a opposed to the base 23 as the boundary is the same, and the pair of baffle piece areas E1 are the same. , E2 can be suppressed from becoming conspicuously dark with respect to the area between the other baffle pieces. That is, it is possible to improve the appearance of the lighting fixture 3 due to the difference in brightness in the region between the baffle pieces due to the base 23.

  Further, as described above, by bringing the single metal baffle piece 44a toward the second electrode 31 on the high mount 33 side, the heat in the peripheral region of the valve end on the second electrode 31 side is reduced to the one sheet. It becomes easy to radiate heat through the baffle piece 44a. For this reason, the coldest part 22a on the second electrode 31 side is easily formed stably, and the light emission efficiency of the fluorescent lamp 21 is improved and the appliance efficiency is also improved.

  FIG. 6 shows a second embodiment of the present invention. Since 2nd Embodiment is the same as 1st Embodiment except the matter demonstrated below, about the same structure, the same code | symbol as 1st Embodiment is attached | subjected and the description is abbreviate | omitted.

  In the second embodiment, one baffle piece 44 a of the baffle pieces 44 included in the baffle 41 detachably attached to the instrument body 11 so as to face the annular fluorescent lamp 21 is a base of the annular fluorescent lamp 21. 23. The position of the baffle piece 44a facing the base 23 is not particularly limited. However, since the annular fluorescent lamp 21 defines the mercury vapor pressure in the lamp by the coldest part 22a, as shown in FIG. A baffle piece 44a is provided so as to face the base 23 at a position close to the second electrode 31 on the high mount 33 side by the close dimension D with respect to the center C.

  An interval X between two baffle piece areas (areas between light control pieces) E1 and E2 adjacent to the baffle piece 44a and part of the cap 23 facing each other is the same. The distance Y between other baffle piece regions E3 provided adjacent to both sides of the baffle piece regions E1 and E2 is the same. Since the other baffle pieces 44 other than the baffle piece 44a are arranged at equal intervals, the interval Z between the other baffle piece regions E4 is the same as the interval Y of the other baffle piece region E3. .

  The interval X between the baffle piece regions E1, E2 is larger than the interval Y of the baffle piece region E3. Under the condition that the interval Y between the baffle piece regions E3 in the lighting fixture 3 that is generally used is (80 to 100) mm, it is preferable to make the interval X larger by (30 ± 10) mm than the interval Y. . Below this set range, the effect of improving the non-uniform brightness of the baffle piece areas E1, E2 and the baffle piece area E3 tends to be insufficient as will be described later. As a result, the appearance of the lighting apparatus 3 is easily damaged.

  Further, the interval Z of the other inter-baffle piece region E4 may not be the same as the interval Y, but the same as the interval Y as in the present embodiment means that each baffle piece 44 other than the baffle piece 44a. In addition, the baffle pieces 44 can be arranged at the same angle, and the arrangement of the baffle pieces 44 is not uneven.

  Except for the matters described above, the second embodiment is the same as the first embodiment including the portions not shown in FIG. In the second embodiment, the base 23 is arranged so as to extend over two baffle piece adjacent regions E1 and E2 with a single baffle piece 44a facing the base 23 as a boundary. For this reason, it is suppressed that the brightness of these two baffle piece area | regions E1 and E2 falls because of the nozzle | cap | die 23, and becomes darker than the other baffle piece area | regions E3 and E4. In addition, an interval X between two baffle piece regions E1 and E2 adjacent to each other with a baffle piece 44a as a boundary is set between other baffle pieces provided so as to sandwich the two baffle piece regions E1 and E2. Since it is larger than the interval Y of the region E3, the area where the two baffle piece regions E1, E2 adjacent to each other with the baffle piece 44a facing the base 23 as a boundary is opposed to the valve 22 is increased. Along with this, it is possible to reduce a decrease in brightness due to the cap 23 facing these two baffle piece regions E1, E2.

  Accordingly, the two baffle piece regions E1 and E2 adjacent to each other with the baffle piece 44a facing the base 23 as a boundary are relative to the other baffle piece regions E3 and E4 not facing the base 23. Therefore, the conspicuous darkness is suppressed and the brightness of each baffle piece region of the baffle 41 can be made substantially the same.

  Furthermore, as described above, by bringing the single metal baffle piece 44a toward the second electrode 31, the brightness of each of the baffle piece adjacent areas E1 and E2 adjacent to the baffle piece 44a is increased. It becomes the same, and it can also control that these baffle piece area | regions E1 and E2 become conspicuously dark with respect to the other baffle piece area | regions E3 and E4. In addition, heat in the vicinity of the bulb end on the second electrode 31 side is easily radiated through the single baffle piece 44a. For this reason, the coldest part 22a on the second electrode 31 side is easily formed stably, the luminous efficiency of the fluorescent lamp 21 is improved, and the instrument efficiency is also improved.

  FIG. 7 shows a third embodiment of the present invention. Since 3rd Embodiment is the same as 1st Embodiment except the matter demonstrated below, about the same structure, the same code | symbol as 1st Embodiment is attached | subjected and the description is abbreviate | omitted.

  In the third embodiment, one baffle piece 44 a among the many baffle pieces 44 included in the baffle 41 detachably attached to the instrument body 11 so as to face the annular fluorescent lamp 21 is a base of the annular fluorescent lamp 21. 23. The position of the baffle piece 44a facing the base 23 is not particularly limited, but the baffle piece 44a is provided so as to be positioned at, for example, the center C of the base 23 when viewed from the front.

  The distances X and Y between the two baffle piece areas (areas between the light control pieces) E1 and E2 where a part of the base 23 adjacent to the baffle piece 44a faces each other are set to satisfy the relationship X <Y. Yes. A low mount 32 formed at one end of the bulb 22 of the annular fluorescent lamp 21 is disposed opposite to the baffle piece region E1 having a narrow interval, and the bulb 22 of the fluorescent lamp 21 is provided to the baffle piece region E2 having a wide interval. A high mount 33 formed at the other end of the is opposed to the other. Since the baffle pieces 44 other than the baffle pieces 44a are arranged at equal intervals, other baffle pieces 44b including the baffle piece regions provided adjacent to both sides of the baffle piece regions E1 and E2 are sandwiched. The intervals Z of the baffle piece regions E3 are the same, and these intervals Z are the same as the intervals X of the baffle piece regions E1.

  Under the condition that the interval Z of the baffle piece region E3 in the lighting fixture 3 generally used is (80 to 100) mm, the interval Y is preferably larger than the interval X by (30 ± 10) mm. . Below this set range, as will be described later, the effect of improving the uneven brightness of the baffle piece areas E1, E2 and the baffle piece area E3 tends to be insufficient. The uneven arrangement is conspicuous and the appearance of the luminaire 3 is easily damaged.

  Note that the interval Z of the other inter-baffle piece region E3 may not be the same as the interval X, but the fact that the interval Z is the same as the interval X as in the present embodiment is different from the baffle piece 44a. The baffle pieces 44 can have the same light shielding angle, and there is no uneven arrangement of the baffle pieces 44, which is preferable for improving the appearance of the lighting fixture 3.

  Except for the matters described above, the second embodiment is the same as the first embodiment, including portions not shown in FIG. In this 3rd Embodiment, since the nozzle | cap | die 23 is arrange | positioned so that the area | region E1, E2 between the two baffle pieces adjacent on the boundary of the one baffle piece 44a facing the nozzle | cap | die 23 may be arrange | positioned, the area | region between these two baffle pieces It is suppressed that the brightness of E1 and E2 falls and it becomes darker than the other area | region E3.

  In addition, since the baffle piece region E2 facing the second electrode 31 of the fluorescent lamp 21 is wider than the other baffle piece regions E1 and E3, the opposed area of the bulb 22 to the baffle piece region E2 Will increase. Therefore, although the coldest part 22a based on the high mount 33 faces the baffle piece region E2, the brightness of the region E2 is improved.

  Therefore, for the reasons described above, the brightness of each of the baffle piece areas E1 and E2 adjacent to each other with the baffle piece 44a facing the base 23 as a boundary is noticeably darker than the other baffle area E3. Can be suppressed. That is, it is possible to improve the appearance of the lighting fixture 3 due to the difference in brightness between the baffle pieces due to the base 23 and the high mount 33.

The perspective view which shows the state by which the lighting fixture which concerns on 1st Embodiment of this invention was installed in the system ceiling. The front view which shows the lighting fixture of FIG. The front view which expands and shows a part of lighting fixture of FIG. Sectional drawing shown along the F4-F4 line | wire in FIG. FIG. 2 is a front view of the annular fluorescent lamp included in the lighting apparatus of FIG. The front view which expands and shows a part of lighting fixture which concerns on 2nd Embodiment of this invention. The front view which expands and shows a part of lighting fixture which concerns on 3rd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 3 ... Lighting fixture, 11 ... Appliance main body, 21 ... Annular fluorescent lamp, 22 ... Bulb, 22a ... Coldest part, 23 ... Base, 30 ... 1st electrode, 31 ... 2nd electrode, 32 ... Mount height Low mount, 33 ... Mount with high mount, A, B ... Mount height, 41 ... Baffle (light control body), 44 ... Baffle piece (light control piece), 44a ... One baffle piece as a reference ( Light control piece), C ... Center of the base, D ... Alignment size, E1, E2 ... Area between adjacent baffle pieces (between light control pieces) with baffle piece 44a as a boundary

Claims (2)

An instrument body;
An annular fluorescent lamp attached to the main body of the apparatus, wherein a base is mounted over both ends of the annular bulb, and the other end of the bulb is higher than the mount height of the first electrode provided at one end of the bulb. A ring-shaped fluorescent lamp in which the mount height of the second electrode provided on the substrate is increased;
A light control body that has a large number of light control pieces arranged at intervals and is attached to the fixture body so as to face the fluorescent lamp, and faces the base in each light control piece. A light control member in which one light control piece is disposed closer to the second electrode side than the center of the base;
The lighting fixture characterized by comprising. An instrument body;
An annular fluorescent lamp attached to the instrument body;
The apparatus body has a large number of light control pieces arranged at intervals, and one light control piece among the light control pieces is opposed to the base of the ring-shaped fluorescent lamp so as to face the fluorescent lamp. The light control body is attached to the other light control piece, and each of the regions between the light control pieces adjacent to each other with the single light control piece as a boundary is positioned between the pair of light control pieces. A light control body formed larger than the space between the light control pieces;
The lighting fixture characterized by comprising.

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