JP4710946B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture.

  2. Description of the Related Art Conventionally, there is known a ceiling-embedded lighting fixture 1 in which a lamp 6 is housed in a cylindrical fixture body 4 disposed on a ceiling back 2 as shown in FIG. Here, as the lamp 6 in the lighting fixture 1, a single-base lamp 6 b in which a base 31 for connection is provided at one end of a straight-tube-like arc tube 30 is used, and this single-base lamp 6 b is an inner periphery of the fixture body 4. It is accommodated in the lamp arrangement part 21 which is the space in the instrument main body 4 in a state protruding inward from the surface. Therefore, as shown in FIG. 7 (b), the side portion of the one-piece lamp 6b in the lamp arrangement portion 21 becomes a gap portion K, and when the one-piece lamp 6b is caused to emit light, uneven brightness occurs. is there. Furthermore, since the arc tube 30 is arranged using a part of the area of the lamp arrangement part 21 in the single-cap lamp 6b, it is not possible to obtain high illuminance efficiently.

  By the way, in recent years, a flat lamp 6a capable of obtaining a high illuminance with a small area as shown in FIG. 8 has been developed (see, for example, Patent Document 1), and the flat lamp 6a is replaced with a single-piece lamp 6b. It is also possible to use it. According to this, the arc tube 30 can be disposed using most of the area of the lamp disposing portion 21 and high illuminance can be obtained efficiently. Occurrence can also be suppressed, and the occurrence of uneven brightness can also be suppressed.

  However, the base 31 (connection terminal portion) for connecting the flat lamp 6a shown in FIG. 8 protrudes above the flat lamp 6a. When this is applied to the luminaire 1 as it is, it is connected to the base 31. Therefore, the lamp socket 20 must be arranged in the appliance main body 4 so as to overlap the base 31, and as a result, the height of the appliance main body 4 becomes long, and the ceiling back 2 having a small height allowance. There is a risk that the instrument body 4 cannot be disposed.

  Furthermore, although the lower surface opening 4a of the instrument body 4 may be provided with a cover body 5 having translucency, in this case, a cover for attaching the cover body 5 to the instrument body 4 in the instrument body 4 is provided. The attachment part 11 needs to be provided. In the luminaire 1 of FIG. 7, the cover mounting portion 11 can be disposed in the gap portion K of the lamp disposing portion 21 with a sufficient space, but the flat lamp 6a of Patent Document 1 is replaced with a single cap lamp 6b. Instead, when used in the lighting fixture 1, the gap portion K of the lamp placement portion 21 is substantially eliminated, so that it is also a problem to secure a space for arranging the cover mounting portion 11. When the cover mounting portion 11 is disposed on the luminaire, it is necessary to increase the diameter of the fixture main body 4 to cope with it, which may increase the size of the luminaire 1.

In other words, the flat lamp 6a is not applied to the ceiling-embedded lighting fixture 1 because the lighting fixture 1 increases in size as described above.
JP 10-208889 A

  The present invention has been made in view of the above points. The object of the present invention is to efficiently arrange a flat lamp and other parts in the instrument body to suppress the occurrence of luminance unevenness and achieve high illuminance. It is an object of the present invention to provide a lighting apparatus that can be ensured and made compact.

  In order to solve the above-described problem, in the lighting fixture according to claim 1, the flat lamp 6a in which the arc tube 30 provided with the bases 31 for connection at both ends of the tube is spirally formed in a plane, A pair of lamp sockets for connecting the appliance main body 4 that accommodates the flat lamp 6a therein, a cover body 5 that is attached to the lower surface opening 4a of the appliance main body 4, and each base 31 disposed at the outer peripheral end of the flat lamp 6a The lamp socket 20 is disposed along the inner peripheral surface of the fixture body 4, and the cover attachment portion 11 for attaching the cover body 5 to the fixture body 4 is a flat surface. It is characterized in that it is disposed at a position shifted in the circumferential direction from the lamp socket 20 on the inner peripheral surface of the instrument body 4 in view. According to the flat lamp 6a arranged in the fixture main body 4, a high illuminance can be secured in the lighting fixture 1 in a space-saving manner. In addition, since the base 31 and the lamp socket 20 of the flat lamp 6a are connected to each other in the plane (plane) of the flat lamp 6a, the height dimension of the appliance body 4 can be suppressed, Since the cover attaching portion 11 is disposed at a position shifted in the circumferential direction from the lamp socket 20 on the inner peripheral surface of the instrument main body 4 in plan view, the cover attaching portion 11 effectively uses the planar area in the instrument main body 4. Thus, the outer diameter of the instrument body 4 can be suppressed. Therefore, the lighting fixture 1 can be made compact.

  Moreover, in the lighting fixture which concerns on Claim 2, the main body attaching part 10 for attaching a fixture main body 4 to the ceiling material 3 in plane view in Claim 1 in the fixture main body 4 is planar view. It is characterized in that it is arranged at a position shifted in the circumferential direction from the lamp socket 20 and the cover mounting portion 11 on the inner peripheral surface of the instrument body 4. According to this, the cover attaching portion 11 can also be efficiently arranged so as to effectively use the plane area in the appliance main body 4, and the outer diameter of the appliance main body 4 can be suppressed, and the lighting fixture can be obtained. 1 can be made compact.

  In the present invention, the flat lamp and other parts are efficiently arranged in the fixture body of the lighting fixture, and while ensuring high illuminance while suppressing the occurrence of uneven brightness, the lighting fixture is made compact. Has the advantage of being able to.

Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  The luminaire 1 of this example shown in FIGS. 1 to 5 is a ceiling-embedded luminaire in which a lamp 6 is housed in a fixture body 4 disposed on the ceiling back 2 with the lower surface opening 4a facing the ceiling opening 3a. As shown in FIG. 2 (a) and FIG. 3, equipment 15 such as an instrument body 4 and a lighting device 15a, which are formed in a cylindrical shape and are attached to the ceiling material 3, is mounted. A part has a top plate set 7 that constitutes the top surface of the instrument body 4 and a cover body 5 that is mounted so as to close the lower surface opening 4 a of the instrument body 4. A flat lamp 6a is used for the lamp 6 disposed in the housed state inside the instrument body 4 as will be described in detail later.

  The instrument body 4 is formed in a bottomed cylindrical shape having a lower surface opening 4a, and a flange portion 8 protruding outward is formed on the edge of the lower surface opening 4a. A top surface portion 4b of the instrument body 4 is formed with a notch-shaped insertion hole 9 (see FIG. 6), and the instrument body 4 is provided on the peripheral surface portion 4c of the instrument body 4 having a bottomed cylindrical side surface. A main body attaching portion 10 for attaching to the ceiling material 3 and a cover attaching portion 11 for attaching the cover body 5 to the instrument main body 4 are provided. Here, as shown in FIG. 2B, the main body mounting portion 10 is configured to have a pivotal leg 10a that is pivotally supported by the instrument main body 4 and can protrude into and out of the peripheral surface portion 4c. In addition, although the body attachment part 10 of this example is provided in a pair at the opposing position of the side surface of the instrument body 4, the number of the installation may be arbitrary. Further, the cover attaching portion 11 has a pair of engaging claws 11 a that engage the attaching spring member 24 of the cover body 5.

  The top plate set 7 has a substrate 12 as a main body, and this substrate 12 closes the insertion hole 9 and is fixed to the top surface portion 4b of the instrument body 4 with a fixing tool 42 such as a screw (see FIG. 6). And a device mounting plate portion 14 that suspends the device 15 such as a lighting device 15a that includes a ballast or the like and lights the lamp 6 and a power supply connection portion 15b that is connected to an external power source and takes in electricity. Yes. One end of the device mounting plate portion 14 is pivotally supported by one end of the main body top plate portion 13 so as to be rotatable up and down (12a in the figure is a pivotal support portion), and the other end of the device mounting plate portion 14 is attached to the ceiling material 3. A ground leg 16 is formed for grounding so as to be placed. A lamp suspension member 17 is suspended from the main body top plate portion 13. The lamp suspension member 17 has a suspension plate portion 19 installed at the lower ends of the pair of leg portions 18, and a pair of bases 31 of the flat lamp 6 a are connected to both ends of the lower surface of the suspension plate portion 19. A lamp socket 20 is attached. That is, the lower part of the suspension board part 19 is a lamp disposition part 21 to which the flat lamp 6a is detachably attached. In this example, the lamp socket 20 located close to the lighting device 15a side is a high-pressure side socket.

  The cover body 5 is formed by attaching the outer edge of the disc-shaped translucent panel 22 to the annular peripheral frame 23 via a packing (not shown). The translucent panel 22 is a semi-milky white plate that does not directly transmit the illumination light from the lamp 6, and the surface thereof is matted. This prevents a person who looks at the lighting device from the room from feeling dazzling. A pair of mounting spring members 24 are attached to the peripheral frame 23 so as to be able to protrude upward, and a reflecting plate 28 protruding upwards along the inner diameter edge of the peripheral frame 23 is provided. The reflection plate 28 is for diffusing the illumination light from the lamp 6 so that the translucent panel 22 is uniformly illuminated. The inner diameter of the peripheral frame 23 is formed to be approximately the same as the maximum outer diameter of a flat lamp 6a described later, and the exposed portion (translucent surface) of the translucent panel 22 in the inner diameter portion of the peripheral frame 23 is a flat lamp. It is designed to be approximately the same as the maximum outer diameter of 6a.

  When this cover body 5 is mounted so as to close the lower surface opening 4a of the instrument body 4, an upward biasing force is generated when the mounting spring material 24 is locked to the locking claw 11a of the instrument body 4. By doing so, the upper surface of the peripheral frame 23 is brought into elastic contact with the lower surface of the flange portion 8 of the fixture main body 4 without any gap, so that insects and the like can be prevented from entering the lighting fixture 1. The mounting spring material 24 of this example is configured by a substantially Ω-shaped spring material in which a loop-shaped endless line portion 29 is provided so as to protrude from the peripheral frame 23. The mounting spring member 24 is formed with a mountain-shaped guide portion 29a at its upper end so that the mounting spring member 24 can be smoothly inserted and locked between the pair of locking claws 11a from below. The attachment work to the instrument body 4 is facilitated. In this example, a pair of mounting spring members 24 are provided at positions facing the peripheral frame 23, and the cover mounting portion 11 that locks the spring material 24 is also provided on the inner peripheral surface of the instrument body 4 (the inner peripheral portion of the peripheral surface portion 4 c). A pair is provided at opposite positions.

  As shown in FIG. 4, the flat lamp 6 a used in the lamp 6 of the present example includes a light emitting tube 30 formed in a double spiral shape in plan view so that the overall shape is substantially a disk shape, and the length direction of the light emitting tube 30. Are connected to the lighting device 15 a via the lamp socket 20 by electrically connecting each base 31 to the corresponding lamp socket 20. .

  The arc tube 30 is formed in a double spiral shape by winding both side portions in the length direction into a spiral shape in the same direction around a middle portion in the length direction in a plane. By forming the tube 30 in a thin flat shape and a double spiral shape, a flat lamp 6a in which the entire surface including the central portion in a plan view emits light in a flat shape can be formed. Compared with the single-cap lamp 6b having the arc tube 30, the lamp 6 can be made smaller and ensure high output illuminance. In addition, an intermediate portion in the length direction of the arc tube 30 serving as the center of the double spiral is formed to be thicker than the other portions, and a part of the middle portion protrudes to one side of the flat lamp 6a. The projecting portion 30a is the coldest spot of the arc tube 30, thereby realizing stable light emission of the flat lamp 6a.

  The pair of caps 31 provided on the arc tube 30 are arranged at point-symmetrical positions around the center of the double spiral arc tube 30 in plan view. The length of the arc tube 30 located between each base 31 and a part of the arc tube 30 located inside the base 31 in the length direction and inside the same part as the part of the arc tube 30 in the length direction. A portion of the direction is filled with a filler 33, and the pair of bases 31 are connected to each other by a bridge 34 arranged on one surface side (upper side) of the flat lamp 6a. And the bridge 34 prevents the double spiral flat lamp 6a from being deformed. The filler 33 provided between each base 31 and the arc tube 30 and between the arc tubes 30 is provided on the surface (lower surface) of the bridge 34 on the flat lamp 6a side, and overlaps with the bridge 34 in plan view. Therefore, the area where the arc tube 30 is blocked by the filler 33 and the bridge 34 is small, and the loss of light is small.

  Two lamp pins 35 parallel to the end face of each base 31 are projected in parallel to the plane (plane) of the flat lamp 6a. Specifically, the protruding direction of the lamp pin 35 provided on one base 31 and the protruding direction of the lamp pin 35 provided on the other base 31 are opposite to each other. The pair of lamp pins 35 of each base 31 protrude from the center of the end face of the base 31 that is circular, and are arranged side by side in a direction perpendicular to the plane (plane) of the flat lamp 6a that emits light in a planar shape.

  The lamp socket 20 includes a socket main body 36 that is fixed to the suspension plate portion 19 and a cylindrical cross-section that is rotatably housed inside a cylindrical holding portion 37 that opens on the base 31 side formed in the socket main body 36. A C-shaped rotating body 38 is rotatably accommodated. An operation lever 40 that protrudes through a notch 39 formed in the front wall portion of the holding portion 37 is provided at an end portion in the circumferential direction of the rotating body 38. A pair of contacts (not shown) are fixed on the inner surface of the rotating body 38.

  As shown in FIG. 4, the flat lamp 6a is inserted into the lamp disposition portion 21 from below so that its center is located at the center of the instrument body 4 in plan view, and the lamp pin 35 provided on the base 31 of the flat lamp 6a. Is electrically and mechanically connected to the lamp socket 20 arranged in the same plane as the flat lamp 6a, and the lamp support spring 41 supports the arc tube 30 or the base 31 so that the lamp suspension member 17 It is attached.

  Specifically, in order to connect the flat lamp 6a to each lamp socket 20, the flat lamp 6a is connected to each base 31 with the C-shaped rotating body 38 opened downward as shown in FIG. A pair of lamp pins 35 are inserted into the rotating body 38 (in this case, they are temporarily supported by the lamp support spring 41 at the same time), and then the operating lever 40 is operated as shown in FIG. By moving, a pair of lamp pins 35 are held by a pair of contacts provided on each rotating body 38, and the pair of contacts and the pair of lamp pins 35 are electrically connected. Thereby, the flat lamp 6a and the lamp socket 20 are connected within the plane (plane) of the flat lamp 6a. In order to release the connection between each lamp socket 20 and the flat lamp 6a, the reverse operation is performed.

  FIG. 1 shows an arrangement structure of the lighting fixture 1 on the ceiling material 3. In order to attach the lighting fixture 1 to the ceiling, it is inserted from the equipment mounting plate portion 14 of the substrate 12 fixed to the fixture body 4 from below the ceiling opening 3a toward the ceiling back 2, and then the pivot leg 10a is operated. After the pivot leg 10a is not projected outward from the peripheral surface portion 4c of the instrument body 4, the instrument body 4 is inserted into the ceiling opening 3a, and the flange portion 8 of the instrument body 4 is inserted through the packing 43 (see FIG. 6). The upper surface of the edge of the ceiling opening 3a of the ceiling material 3 is brought into contact with the lower surface of the ceiling material 3 and the pivotal leg 10a is operated to protrude outward from the peripheral surface portion 4c of the instrument body 4. Abut so that it rests on. Thereby, the ceiling material 3 is sandwiched between the flange portion 8 and the pivot leg 10a, and the lighting fixture 1 is fixed to the ceiling material 3 (FIG. 2B).

  Here, since the equipment mounting plate portion 14 is pivotally supported by the main body top plate portion 13, the lighting fixture 1 can be mounted even when the height of the ceiling back 2 is low. Moreover, although the recessed part 4d used as the outer peripheral side becomes low in the corner | angular part of the top | upper surface and side surface of the instrument main body 4, the lighting fixture 1 in case the height allowance of the ceiling back 2 is low also by this It is possible to install. Further, the pivot leg 10a is movable up and down with respect to the fixture body 4, and the lighting fixture 1 can be attached to the ceiling material 3 of different thickness by adjusting the vertical position of the pivot leg 10a with respect to the fixture body 4. It is. In addition, since the grounding leg 16 of the device mounting plate portion 14 is grounded so as to be placed on the ceiling material 3, the load of the device 15 attached to the device mounting plate portion 14 can be supported by the ceiling material 3. Stable arrangement | positioning to the ceiling material 3 of the lighting fixture 1 is enabled.

  Thereafter, as described above, the flat lamp 6a is arranged on the lamp arrangement portion 21 via the lamp socket 20, and the cover body 5 is attached, so that the lighting fixture 1 is attached to the ceiling member 3 as shown in FIG. It is arranged. Here, the lamp arrangement portion 21 is positioned inside the instrument body 4. Accordingly, the flat lamp 6 a disposed in the lamp disposition portion 21 is accommodated inside the instrument body 4. Further, the cover body 5 is mounted on the instrument body 4 by engaging the mounting spring member 24 with the cover mounting portion 11, but the reflector 28 of the cover body 5 is directly below the outer edge portion of the flat lamp 6a. The light emitted from the flat lamp 6a can be irradiated downward without substantially leaking.

  In the lighting fixture 1 of this example, the flat lamp 6a formed by spirally forming the arc tube 30 in the plane is used for the lamp 6 as described above. Therefore, the plane in the lamp disposition portion 21 in the fixture main body 4 is used. Since the arc tube 30 can be positioned with high density in the area, that is, the gap portion K of the lamp disposition portion 21 that is generated when the one-piece lamp 6b is used can be substantially eliminated, and thus uneven brightness occurs. In addition, the lamp disposition portion 21 can be effectively used to efficiently obtain high illuminance. Further, in this example, the semi-milky translucent panel 22 and the reflecting plate 28 provided in the cover body 5 further suppress the occurrence of luminance unevenness.

  Further, the flat lamp 6a of the present example is formed so that the outer diameter is different in the circumferential direction so that the base 31 is located at the maximum diameter portion. Specifically, the outer diameter of the flat lamp 6 a is formed so as to gradually decrease in the winding direction from the maximum diameter portion where the base 31 is located to the center of the arc tube 30. Since the instrument body 4 has a perfect circular inner peripheral surface, as shown in FIG. 1B, the maximum diameter portion where the base 31 of the flat lamp 6a is located is close to the inner peripheral surface of the instrument main body 4. In the remaining outer diameter portion of the flat lamp 6a, a gap S having a relatively wide gap width is interposed between the inner peripheral surface of the instrument body 4 and the flat lamp 6a.

  Here, the lamp socket 20 is disposed along the proximity area 26 to the maximum diameter portion of the flat lamp 6 a on the inner peripheral surface of the fixture body 4, and the flat lamp 6 a is disposed on the lamp disposing portion 21. At the time of installation, the base 31 positioned at the maximum diameter portion of the flat lamp 6 a is connected to the lamp socket 20 disposed in the proximity area 26. Thus, since the base 31 and the lamp socket 20 of the flat lamp 6a are respectively connected and connected within the plane (plane) of the flat lamp 6a, the height dimension of the appliance body 4 can be suppressed.

  Further, the peripheral surface portion 4c of the instrument main body 4 is provided with a main body attaching portion 10 and a cover attaching portion 11, which are arranged in the circumferential direction from the lamp socket 20 on the inner peripheral surface of the instrument main body 4 in a plan view. It is arranged at each shifted part. That is, the main body attaching portion 10 and the cover attaching portion 11 are disposed at a portion (non-proximity region 27) on the inner peripheral surface of the instrument main body 4 where the gap S is interposed between the main body attaching portion 10 and the cover attaching portion 11. As described above, the main body mounting portion 10 and the cover mounting portion 11 are disposed in a portion shifted in the circumferential direction from the lamp socket 20 on the inner peripheral surface of the instrument main body 4 in a plan view, and thus are not hindered by the lamp socket 20. It can arrange | position with respect to the empty space (gap S) in the instrument main body 4 which can be operated easily. That is, since the main body attaching portion 10 and the cover attaching portion 11 can be disposed in the instrument main body 4 so as to effectively use the planar area in the instrument main body 4, the outer diameter of the instrument main body 4 can also be suppressed.

  As described above, the lighting fixture 1 of the present example can simultaneously suppress the height dimension and the outer diameter dimension of the fixture body 4, and can effectively be made compact.

  Of course, at this time, the connecting operation between the lamp socket 20 and the flat lamp 6a can be performed without any trouble without the main body mounting portion 10 and the cover mounting portion 11 being in the way. Furthermore, since the main body attachment portion 10 and the cover attachment portion 11 are disposed in the inner peripheral surface portion (non-proximity region 27) of the instrument main body 4 where the gap S is interposed between the main body attachment portion 10 and the cover lamp 6a. A gap S having a wide gap width can be used as a work space, and the workability to the main body attachment portion 10 and the cover attachment portion 11 is improved. The main body mounting portion 10 and the cover mounting portion 11 are also arranged on the peripheral surface portion 4c of the instrument main body 4 so as not to overlap with each other in plan view. Each of the above operations can be performed from below without hindrance (without being obstructed by each other's members).

  FIG. 6 shows a lighting apparatus 1 according to another example of the embodiment of the present invention. This example basically follows the structure of the previous example, and changes some of its components. In the following, changes are described. That is, in this example, three main body attaching portions 10 are provided, one more than the previous example. In consideration of the load balance between the instrument body 4 and the top plate set 7, the body attachment portions 10 are arranged at substantially equal intervals in the circumferential direction on the peripheral surface portion 4 c of the instrument body 4, but are not limited thereto. Absent. Further, the suspension plate portion 19 of the previous example is configured by a disk-like plate 19a that covers all the upper part of the flat lamp 6a, whereas the suspension plate portion 19 of the present example has a bridge 34 of the flat lamp 6a. A rectangular plate 19b that covers the upper side and a decorative plate 19c that is attached to the lower surface of the rectangular plate 19b. The lamp sockets 20 are attached to both ends of the rectangular plate 19b, and notches 19c1 through which the lamp sockets 20 are inserted are formed on both ends of the substantially disc-shaped decorative plate 19c. The luminaire 1 of this example is slightly different from the previous example, although there are the above changes, and the perspective view is substantially the same as FIG. 2A and the luminaire 1 is arranged on the ceiling in FIG. Needless to say, it has the same advantages as described in the previous example (such as compactness of the lighting fixture 1).

  Moreover, in the said embodiment, although the thing of the type which has the translucent panel 22 and obstruct | occludes the lower surface of the instrument main body 4 was illustrated as the cover body 5, it does not have the translucent panel 22, but is comprised only with the surrounding frame 23. It can also be replaced with a decorative frame body.

The state which has arrange | positioned the lighting fixture of embodiment of this invention to the ceiling is shown, (a) is a sectional side view, (b) is the bottom view of the state which removed the cover body in (a). is there. (A) is a perspective view of the lighting fixture same as the above, (b) is a side view of the principal part of the state which has arrange | positioned the lighting fixture which removed the cover body to the ceiling. It is a disassembled perspective view of a lighting fixture same as the above. It is a flat lamp same as the above, (a) is a side view, (b) is a bottom view. It is explanatory drawing explaining the attachment of the flat lamp to a lamp socket same as the above, (a) is a perspective view of the state just before attachment of the flat lamp to a lamp socket, (b) enabled the flat lamp to be attached. It is a perspective view of the lamp socket of a state. It is the lighting fixture in the other example of embodiment of this invention, Comprising: (a) is the disassembled perspective view seen from diagonally upward, (b) is the exploded perspective view seen from diagonally downward. It is an example of a prior art, (a) is a sectional side view, (b) is a bottom view. It is the perspective view which looked at the flat lamp of the other example of the prior art from the downward direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Ceiling back 3 Ceiling material 3a Ceiling opening 4 Appliance main body 4a Bottom opening 5 Cover body 6a Flat lamp 10 Main body attaching part 11 Cover attaching part 20 Lamp socket 30 Arc tube 31 Cap

Claims (2)

  A flat lamp in which arc tubes having connection bases at both ends of the tube are spiraled in the plane, an instrument main body that accommodates the flat lamp inside, a cover body that is attached to the lower surface opening of the instrument main body, A lighting fixture comprising a pair of lamp sockets for connection to each base disposed at the outer peripheral end of the flat lamp, wherein the lamp socket is disposed along the inner peripheral surface of the fixture body, A lighting fixture, wherein a cover mounting portion for attaching a body to a fixture body is disposed at a position shifted in a circumferential direction from the lamp socket on the inner peripheral surface of the fixture body in a plan view.   A part of the main body mounting part that protrudes into the equipment body and attaches the equipment body to the ceiling material is arranged at a position shifted in the circumferential direction from the lamp socket and cover mounting part on the inner peripheral surface of the equipment body in plan view. The lighting fixture according to claim 1, wherein

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