JP2007095394A - Downlight - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To lower the temperature of an appliance while restricting embedding height, in a downlight embedded in an embedding hole of a ceiling. <P>SOLUTION: This downlight 1 is provided, in an appliance body 2 having a top plate 9 on the upper surface, with a heat shield plate 3 molded integrally with a frame body covering an opening edge part thereof, and provided with an auxiliary top plate 10 attached to the upper surface of the heat shield plate 3. The auxiliary top plate 10 is projected from the appliance body 2 by crossing an insertion hole 21 of the appliance body 2 and arranged so as to be nearly flush with the top plate 9. The auxiliary top plate 10 pushes up a heat insulation material 20 under the roof together with the top plate 9. By increasing the length at which the heat insulation material 20 is pushed up like that, the volume of a part covered with the heat insulation material 20 can be widely ensured without increasing the embedding height of the appliance. Thereby, the heat of the downlight 1 can be radiated in the secured space, whereby the temperature of the appliance can be lowered. Since the top plate 9 and the auxiliary top plate 10 are separately installed, they can be installed without changing the diameter of the embedding hole 19. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a downlight embedded in a ceiling.

  Conventionally, this type of downlight, for example, as shown in FIG. 18, is embedded in an embedding hole 19 formed in the ceiling plate 18 and has a top plate 9 on the upper surface, A reflector 4 provided inside, a lamp 5 having a light emitting part disposed inside the reflector 4, a socket 6 for mounting the lamp 5, and a lower surface of the top plate 9, 5 includes a terminal block 8 for supplying power via a socket 6. Here, the reflection plate 4 is attached to the instrument body 2 by a nut 14. The socket 6 is provided across the insertion port 33 provided in the upper part of the side surface of the instrument body 2 and the upper part of the side surface of the reflector 4, and is mounted across the insertion port 42 in which the socket packing 15 is disposed. The airtightness in the room is achieved by a frame 32 that covers the edge of the opening provided on the lower surface of the instrument body 2 and a main body packing 12 that is provided on the flange portion 22 provided at the edge of the opening of the lower surface of the instrument body 2. It is secured. In order to reduce the temperature of the power supply wire inserted into the instrument shell and the terminal block 8, the volume of the portion covered with the heat insulating material 20 by the top plate 9 is secured widely.

Further, in the same downlight, a heat insulating material support that supports the heat insulating material on the back of the ceiling is provided on the upper part of the instrument main body, and this heat insulating material support is arranged to protrude upward from the instrument main body, It is possible to adjust the amount of upward protrusion from the instrument body. In order to reduce the temperature of the power supply cable to be inserted into the instrument shell and terminal block, the insulator supporter supports the insulator and increases the distance from the outer surface of the instrument body to the insulator so that it is covered by the insulator. There is known one that ensures a large volume (see Patent Document 1).
Japanese Utility Model Publication No. 62-191002

  In the conventional downlight as described above, in the former structure, the top plate 9 has a width smaller than the diameter of the embedding hole 19, and in order to secure a large volume of the portion covered with the heat insulating material, Length is increased. In order to insert the long top plate 9 through the small-diameter embedding hole 19, a high embedding height on the ceiling is required, and the ceiling cannot be installed in a narrow space. In the latter structure shown in Patent Document 1, the amount of upward protrusion of the heat insulating material support tool from the instrument body is adjusted according to the height of the embedded ceiling. Therefore, when the height behind the ceiling is high, the insulation support material is fixed at a position that largely protrudes upward from the instrument body, and a large distance from the outer surface of the instrument body to the insulation material can be secured. A large volume of the covered portion can be secured. However, when the embedding height of the ceiling is low, the heat insulating material support is fixed at a position that protrudes upward from the device main body, so that a large distance from the outer surface of the device main body to the heat insulating material cannot be secured. It was difficult to ensure a large volume of the portion covered with the material.

  The present invention has been made in order to solve the above-described conventional problems, and an object thereof is to provide a downlight that can reduce the temperature of the instrument while suppressing the embedded height.

  In order to achieve the above object, the invention of claim 1 is characterized in that an instrument body having an opening on the lower surface, embedded in an embedding hole formed in the ceiling, provided inside the instrument body, and having an opening on the lower surface. In a downlight comprising a reflector having a lamp, a lamp having a light emitting portion disposed inside the reflector, and a socket to which the lamp is mounted, the ceiling provided on the upper surface of the fixture body and supporting the heat insulating material on the back of the ceiling. It is provided with an auxiliary top plate that is disposed on substantially the same plane as the top plate, protrudes from the instrument body in a different direction from the top plate, and supports the heat insulating material together with the top plate.

  The invention according to claim 2 is the downlight according to claim 1, wherein the instrument body has an insertion port for inserting the auxiliary top plate after the instrument body is inserted into the embedded hole in the ceiling.

  The invention of claim 3 is the downlight according to claim 1, wherein a heat shield for shielding heat is disposed between the instrument body and the reflector, and the auxiliary top plate is a reflector or a heat shield. It is formed integrally.

  According to a fourth aspect of the present invention, in the downlight according to the second aspect, the instrument main body has a gate shape straddling the opening.

  According to a fifth aspect of the present invention, in the downlight according to the first aspect, the instrument main body has an insertion port for inserting the auxiliary top plate, and the auxiliary top plate is attached to the upper part of the instrument main body or the top plate. Is.

  According to a sixth aspect of the present invention, in the downlight according to the first aspect, the auxiliary top plate is provided at an upper portion of the instrument body, and is installed at a predetermined position by sliding the auxiliary top plate.

  According to a seventh aspect of the present invention, in the downlight according to the first aspect, the auxiliary top plate is provided at an upper portion of the instrument body, and is installed at a predetermined position by rotating the auxiliary top plate.

  The invention according to claim 8 is the downlight according to claim 3 or 5, wherein the socket is disposed below the auxiliary top plate across the insertion opening of the instrument body in the attached state. .

  According to a ninth aspect of the present invention, in the downlight according to the fourth or eighth aspect, the terminal block is provided on the auxiliary top plate.

  According to a tenth aspect of the present invention, in the downlight according to any one of the first to ninth aspects, the top plate is longer than the auxiliary top plate.

  According to the first aspect of the present invention, the length that the appliance pushes up the heat insulating material behind the ceiling in the attached state is the same as the length of the auxiliary top plate as compared with the conventional downlight with only the top plate. The length (the length obtained by adding the length of the top plate and the auxiliary top plate) becomes long, and a large volume of the portion covered with the heat insulating material can be secured. Accordingly, since the heat can be radiated in the reserved space without increasing the height of the embedding as in the conventional case, the instrument temperature can be reduced.

  According to the invention of claim 2, even if the instrument length is long, since the top plate and the auxiliary top plate are constructed separately, it can be constructed even from a small-diameter embedded hole. Since the auxiliary top plate can be disposed at a position where the auxiliary top plate is inserted through the insertion opening of the instrument body and supports the heat insulating material on the back of the ceiling, it is easy to construct the auxiliary top on the back of the ceiling.

  According to invention of Claim 3, since an auxiliary | assistant top plate can be attached to an instrument main body integrally with a reflecting plate or a heat shield, it becomes possible to reduce a construction man-hour.

  According to the invention of claim 4, since the interference part with the embedding hole is reduced in the instrument body, the workability can be improved. In addition, since complicated drilling in the tool body is not required, the number of parts processing steps can be reduced, and the cost can be reduced.

  According to the invention of claim 5, the auxiliary top plate is a separate component from the instrument body and the top plate, and it becomes possible to construct the auxiliary top plate after constructing the instrument body. The construction can be made as long as possible, and the volume of the portion covered with the heat insulating material can be secured widely. Thereby, reduction of instrument temperature is attained.

  According to the invention of claim 6, since it becomes possible to store the auxiliary top plate in the top plate at the time of packing, the packing size can be reduced. Moreover, since the insertion hole for an auxiliary | assistant top plate becomes unnecessary in an instrument main body, parts processing man-hours and cost can be reduced.

  According to the invention of claim 7, since it becomes possible to store the auxiliary top plate in the top plate at the time of packing, the packing size can be reduced. Moreover, since the insertion hole for an auxiliary | assistant top plate becomes unnecessary in an instrument main body, parts processing man-hours and cost can be reduced.

  According to invention of Claim 8, since a socket is arrange | positioned in the direction different from a top plate, the heat conduction to a top plate can be reduced, Thereby, the heat conduction from a top plate to an instrument main body is also reduced. Therefore, the instrument temperature can be reduced.

  According to the ninth aspect of the invention, wiring between the socket and the terminal block is facilitated, and the number of assembling steps can be reduced, so that the cost can be reduced.

  According to invention of Claim 10, since the length of an auxiliary top plate is shorter than a top plate, if it is the embedding height which can embed a top plate, an auxiliary top plate can be constructed reliably and workability improvement Can be planned.

  A downlight according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a downlight 1 according to the first embodiment, and FIG. 2 shows a part A of FIG. FIG. 3 shows the downlight 1 partially disassembled. The downlight 1 is an illuminating device that is embedded in an embedding hole 19 formed in the ceiling plate 18 and irradiates light indoors through an opening on the lower surface. The downlight 1 includes a substantially cylindrical instrument body 2 having an opening on the lower surface, a heat shield plate 3 for shielding heat inside the instrument body 2, and an opening on the lower surface inside the heat shield plate 3. A substantially bowl-shaped reflector 4 is provided. In the downlight 1, the light emitting portion of the lamp 5 is arranged inside the reflector 4, a socket 6 for mounting the lamp 5, a socket base 7 for fixing the socket 6, and the lamp 5 via the socket 6. And a terminal block 8 for supplying power.

  The instrument body 2 includes a top plate 9 having a substantially rectangular plate shape on the upper surface, an insertion port 21 for inserting the auxiliary top plate 10 and the socket 6 in the upper part of the side surface, and a mounting bracket 11 ( 3). The fitting 11 is housed inside the instrument body 2 when inserted through the embedded hole 19, and protrudes outward from the side surface of the instrument body 2 when inserted through the embedded hole 19 and on the back of the ceiling. The instrument main body 2 has a collar portion 22 at the opening edge of the lower surface, and the collar portion 22 is covered with the main body packing 12 on the entire circumference. When the instrument body 2 is embedded in the embedding hole 19, the instrument body 2 is fixed by sandwiching the ceiling plate 18 at the edge of the embedding hole 19 between the mounting bracket 11 and the flange portion 22 of the instrument body 2. The instrument body 2 has a screw 13 projecting downward from the inner upper surface. The heat shield plate 3, the reflection plate 4, the socket base 7 and the auxiliary top plate 10 are attached to the screw 13 and fixed by a nut 14. . The top plate 9 has one end portion in the longitudinal direction attached to the upper surface of the instrument body 2, and the other end portion of the top plate 9 is disposed so as to protrude in a direction opposite to the side of the instrument body 2 having the insertion port 21. Yes. A terminal block 8 is attached to the lower surface of the end portion of the top plate 9 protruding from the instrument body 2. When the downlight 1 is attached to the ceiling board 18, the top board 9 pushes up the heat insulating material 20 constructed on the back of the ceiling.

  The heat shield plate 3 includes a heat shield body 31 that covers the outer surface of the reflector 4 and a frame body 32 that is provided continuously with the heat shield body 31 and covers the opening edge of the instrument body 2. The heat shield plate 3 has an insertion port 33 for inserting the socket 6 in the upper part of the side surface, and a socket packing 15 is provided at the edge of the insertion port 33 of the heat shield plate 3. Is shielded from the ceiling. Further, the frame body 32 covers the main body packing 12 disposed in the instrument main body 2, and also shields the room and the back of the ceiling by sandwiching the main body packing 12 between the frame body 32 and the ceiling plate 18.

  The reflection plate 4 has a flange portion 41 at the opening edge of the lower surface, and has an insertion port 42 for inserting the socket 6 at the upper portion of the side surface.

  The socket 6 crosses the insertion port 42 of the reflector 4, the insertion port 33 of the heat shield plate 3, and the insertion port 21 of the instrument body 2, and forms a predetermined angle with respect to the vertical axis of the instrument body 2. And attached to one end of the socket base 7. One end portion of the socket base 7 to which the socket 6 is attached is disposed so as to protrude to the side having the insertion port 33 of the heat shield plate 3, and the other end portion of the socket base 7 is disposed on the heat shield plate 3. Installed on top.

  The auxiliary top plate 10 has a substantially rectangular shape, and one side in the longitudinal direction is bent in a step shape. In the attached state, the auxiliary top plate 10 is arranged so that the side bent in a stepped shape is attached to the upper surface of the heat shield plate 3 and protrudes from the instrument body 2 across the insertion port 21 of the instrument body 2. Further, the portion of the auxiliary top plate 10 that protrudes from the instrument body 2 is substantially flush with the top plate 9.

  The airtight packing 16 is attached to the inner upper surface of the instrument main body 2 in a state of being inserted into the screws 13 of the instrument main body 2, and shields between the room and the back of the ceiling.

  Further, the airtightness of the room is ensured by shielding the room and the back of the ceiling by the heat shield plate 3, the main body packing 12, the socket packing 15, and the airtight packing 16.

  Next, the construction procedure of the downlight 1 having the above configuration will be described. The top plate 9 is inserted into the embedding hole 19 from the side protruding from the instrument body 2, and the top plate 9 is inserted between the ceiling plate 18 and the heat insulating material 20. When the entire top plate 9 is inserted between the ceiling plate 18 and the heat insulating material 20, and the upper surface of the instrument body 2 is inserted through the embedding hole 19, the instrument body 2 is pushed upward. Thereby, the top plate 9 pushes up the heat insulating material 20. The fixture body 2 is fixed by sandwiching the ceiling plate 18 at the opening edge of the embedding hole 19 between the collar portion 22 of the appliance main body 2 and the mounting bracket 11. Next, the socket 6 is inserted through the insertion port 33 of the heat shield plate 3. The reflection plate 4 is disposed inside the heat shield plate 3, and the socket 6 is inserted through the insertion opening 42 of the reflection plate 4. Subsequently, the auxiliary top plate 10, the socket base 7, and the heat shield are inserted into the screw 13 protruding inside the instrument body 2 while the auxiliary top plate 10, the socket 6, and the socket base 7 are inserted through the insertion port 21 of the instrument body 2. The plate 3 and the reflection plate 4 are attached to the screw 13, and the nut 14 is screwed into the screw 13 and fixed. Finally, the lamp 5 is attached to the socket 6.

  In the downlight 1 configured as described above, since the length of the auxiliary top plate 10 is shorter than the top plate 9, if the space behind the ceiling is an embedding height at which the top plate 9 can be embedded, the auxiliary top plate is surely provided. 10 can be constructed, and the auxiliary top plate 10 can be constructed on the instrument main body 2 integrally with the heat shield plate 3 or the reflecting plate 4, so that the number of construction steps can be reduced.

  Moreover, since the auxiliary top plate 10 supports the heat insulating material 20 on the back of the ceiling together with the top plate 9, the instrument length is longer than the conventional downlight 1 of only the top plate 9, and without increasing the instrument height, A large volume of the portion covered with the heat insulating material 20 can be secured. Thereby, since the downlight 1 can radiate heat in a widely secured space, it is possible to reduce the temperature of the instrument shell, the construction material, the contact portion, the frame surface, and the like. Furthermore, since the socket 6 is disposed in a different direction from the top plate 9, heat conduction from the socket 6 to the top plate 9 can be reduced. Thereby, since heat conduction from the top plate 9 to the instrument main body 2 is also reduced, the instrument outer temperature can be further reduced.

  FIG. 4 shows the downlight 1 according to the second embodiment. The instrument body 2 is formed in a gate shape straddling the opening on the lower surface, and has a ring-shaped collar portion 22 projecting outward on the lower surface of the portal-shaped instrument body 2 so as to cover the collar portion 22. A main body packing 12 is attached, and a mounting bracket 11 is provided on the side surface of the instrument main body 2 so as to protrude outward. Other configurations are the same as those of the first embodiment.

  In the downlight 1 configured as described above, the implement main body 2 can reduce the interference portion with the embedding hole 19 of the ceiling plate 18, so that the workability can be improved. In addition, since complicated hole machining on the tool body 2 is not required, the number of parts processing man-hours can be reduced, and the cost can be reduced.

  FIG. 5 shows the downlight 1 according to the third embodiment, and FIG. 6 shows the downlight 1 disassembled. The instrument main body 2 has an insertion opening 23 for inserting the socket 6 in the upper side surface on the side from which the top plate 9 projects, and the top plate 9 attached to the upper surface of the instrument main body 2 includes the socket base 7 and It is integrally formed. The auxiliary top plate 10 separated from the heat shield plate 3 has a substantially rectangular shape, and the strength is maintained by bending at both ends in the longitudinal direction. The auxiliary top plate 10 is disposed inside the upper surface of the instrument body 2 so as to protrude from the insertion port 21 of the instrument body 2. Other configurations are the same as those of the first embodiment.

  Next, the construction procedure of the downlight 1 having the above configuration will be described. Before the instrument body 2 is embedded in the embedding hole 19 formed in the ceiling plate 18, the socket 6 is inserted into the insertion port 23 of the instrument body 2 and attached to the socket base 7 of the top plate 9. The instrument main body 2 is embedded in the embedding hole 20 formed in the ceiling plate 18 by the same procedure as in the first embodiment, and the instrument main body 2 is fixed by the collar portion 22 of the instrument main body 2 and the mounting bracket 11. Next, the auxiliary top plate 10 is inserted into the insertion port 21 of the instrument main body 2, and one end portion in the longitudinal direction of the auxiliary top plate 10 is attached to the screw 13 protruding inside the instrument main body 2. Is inserted. Other procedures are the same as those in the first embodiment.

  In the downlight 1 configured as described above, since the auxiliary top plate 10 can be applied after the installation of the instrument body 2, the length of the auxiliary top plate 10 can be made as long as possible. Therefore, a large volume of the portion covered with the heat insulating material 20 can be secured. Thereby, temperature reductions, such as an instrument outline, a construction material, a contact part, and a frame surface, are attained.

  FIG. 7 shows the instrument body 2 of the downlight 1 according to the fourth embodiment. The auxiliary top plate 10 has a substantially rectangular shape, and the strength is maintained by bending the both ends in the longitudinal direction. The auxiliary top plate 10 is disposed on the top plate 9 and has an operation bar 17 on the lower surface of the auxiliary top plate 10. A long hole 24 is formed in the B direction on the upper surface of the instrument body 2 and the top plate 9. The operation bar 17 penetrates the top plate 9 and a long hole 24 formed in the upper surface of the instrument main body 2 and protrudes into the instrument main body 2, and operates the operation bar 17 in the B direction along the long hole 24. Thus, the auxiliary top plate 10 is slid to a predetermined position. Other configurations are the same as those of the first embodiment.

  Next, the construction procedure of the downlight 1 having the above configuration will be described. Before embedding the instrument body 2 in the embedding hole 19 formed in the ceiling plate 18, the socket is inserted into the insertion port 23 of the instrument body 2 and attached to the socket base 7 of the top plate 9. As shown in FIG. 8, the auxiliary top plate 10 is disposed on the top plate 9, and the instrument body 2 is embedded in the embedding hole 19 formed in the ceiling plate 18 by the same procedure as in the first embodiment. The instrument body 2 is fixed by the collar portion 22 of the instrument body 2 and the mounting bracket 11. Next, as shown in FIG. 9, the operation bar 17 protruding from the auxiliary top 10 into the instrument body 2 is operated, and the auxiliary top 10 is slid in the B direction and arranged at a predetermined position. Other procedures are the same as those in the first embodiment. Moreover, if the auxiliary top plate 10 is not slid to a predetermined position, as shown in FIG. 10, the operation bar 17 interferes when the heat shield plate 3 and the reflection plate 4 are attached to the screw 13 inside the instrument body 2. .

  In the downlight 1 configured as described above, the auxiliary top plate 10 is housed in the top plate 9 at the time of packing, so that the packing size can be reduced. Moreover, since the instrument main body 2 does not require the insertion port 21 for allowing the auxiliary top plate 10 to be inserted, the number of parts processing steps can be reduced, and the cost can be reduced.

  FIG. 11 shows the instrument body 2 of the downlight 1 according to the fifth embodiment. The auxiliary top plate 10 has a substantially rectangular shape, is arranged on the top of the top plate 9, and has an operation bar 17 on the lower surface of the auxiliary top plate 10. An arc-shaped long hole 25 is formed in the upper surface of the instrument body 2 and the top plate 9. The operation bar 17 penetrates the long hole 25 formed in the upper surface of the top plate 9 and the instrument main body 2 and protrudes into the instrument main body 2, and operates the operation bar 17 in the C direction along the long hole 25. Thereby, the auxiliary top plate 10 is rotated to a predetermined position. Other configurations are the same as those of the first embodiment.

  Next, the construction procedure of the downlight 1 having the above configuration will be described. Before the instrument body 2 is embedded in the embedding hole 19 formed in the ceiling plate 18, the socket 6 is inserted into the insertion port 23 of the instrument body 2 and attached to the socket base 7 of the top plate 9. As shown in FIG. 11, the auxiliary top plate 10 is disposed on the top plate 9, and the instrument body 2 is embedded in the embedded hole 19 formed in the ceiling plate 18 by the same procedure as in the first embodiment. The instrument body 2 is fixed by the collar portion 22 of the instrument body 2 and the mounting bracket 11. Next, as shown in FIG. 12, the operation bar 17 protruding from the auxiliary top 10 into the instrument body 2 is operated to rotate the auxiliary top 10 in the C direction and arrange it at a predetermined position. Other procedures are the same as those in the first embodiment. Further, if the auxiliary top plate 10 is not rotated to a predetermined position, the operation bar 17 interferes when the heat shield plate 3 and the reflection plate 4 are attached to the screws 13 inside the instrument body 2, and the auxiliary top plate 10 is predetermined. As shown in FIG. 13, the operating rod 17 is inserted into the hole 34 provided on the upper surface of the heat shield plate 3 only when the position is rotated to the position.

  The downlight 1 configured as described above is different from the downlight 1 of the fourth embodiment in the method of moving the auxiliary top plate 10, but the configuration and arrangement of the auxiliary top plate 10 at the time of packaging are the same as those of the fourth embodiment. Therefore, the same effect as in the fourth embodiment can be obtained.

  FIG. 14 shows the downlight 1 according to the sixth embodiment. The terminal block 8 is provided on the lower surface of the end protruding from the instrument main body 2 or the heat shield 3 of the auxiliary top plate 10. Other configurations are the same as those of the first embodiment.

  In the downlight 1 configured as described above, wiring between the socket 6 and the terminal block 8 becomes easy, and the number of assembling steps can be reduced, so that the cost can be reduced.

  Next, various modifications are shown. FIG. 15 shows a modification of the instrument main body 2 of the downlight 1 according to the first or second embodiment. Here, the insertion port 21 of the instrument body 2 is provided so as to be in a position rotated 90 degrees on the horizontal plane with respect to the top plate 9, and thus the position of the insertion port 21 is different from that of the top plate 9. Any direction is acceptable.

FIG. 16 shows a modification of the auxiliary top plate 10 of the downlight 1 according to the fourth embodiment. Here, the auxiliary top plate 10 is formed integrally with the heat shield plate 3. FIG. 17 shows a modification of the socket base 7 of the downlight 1 according to the seventh embodiment. Here, the socket base 7 is integrally formed with the auxiliary top plate 10. Thereby, the number of assembling steps can be reduced, and the cost can be reduced.
In addition, this invention is not restricted to the structure of the said various embodiment, A various deformation | transformation is possible in the range which does not change the meaning of invention.

Sectional drawing of the downlight which concerns on Embodiment 1 of this invention. The enlarged view of the A section of FIG. The disassembled perspective view of the downlight partially decomposed | disassembled which concerns on Embodiment 2 of this invention. The perspective view of the downlight which concerns on Embodiment 3 of this invention. The perspective view of the downlight which concerns on Embodiment 4 of this invention. The disassembled perspective view of the downlight which was decomposed | disassembled. The perspective view of the downlight which concerns on Embodiment 5 of this invention. The perspective view of the instrument main body before the auxiliary top plate of the downlight moves. The perspective view of the instrument main body in which the auxiliary top plate of the downlight is moving. Sectional drawing of the instrument main body in which the auxiliary top plate of the downlight is moving. The perspective view of the instrument main body before the auxiliary | assistant top plate of the downlight which concerns on Embodiment 6 of this invention moves. The perspective view of the instrument main body after the auxiliary top plate of the downlight moves. Sectional drawing of the instrument main body after the auxiliary top plate of the downlight moves. The perspective view of the downlight which concerns on Embodiment 7 of this invention. The perspective view of the modification of the instrument main body which concerns on Embodiment 1 and Embodiment 2 of this invention. The disassembled perspective view of the modification of the auxiliary top plate which concerns on Embodiment 4 of this invention. The perspective view of the modification of the socket stand concerning Embodiment 7 of this invention. The sectional side view of the downlight of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Downlight 2 Apparatus main body 21 Insertion opening 3 Heat shield plate 4 Reflection plate 5 Lamp 6 Socket 7 Socket stand 8 Terminal block 9 Top plate 10 Auxiliary top plate 18 Ceiling plate 19 Embedded hole 20 Thermal insulation

Claims (10)

An instrument body embedded through an embedding hole formed in the ceiling and having an opening on the lower surface, a reflector plate provided inside the instrument body and having an opening on the lower surface, and a light emitting portion inside the reflector plate In a downlight comprising a lamp disposed in a socket and a socket in which the lamp is mounted,
A ceiling plate provided on the upper surface of the instrument body and supporting the heat insulating material on the back of the ceiling;
A downlight comprising: an auxiliary top plate disposed on substantially the same plane as the top plate, protruding from the instrument body in a direction different from the top plate, and supporting a heat insulating material together with the top plate.   2. The downlight according to claim 1, wherein the instrument main body has an insertion port through which the auxiliary top plate is inserted after the instrument main body is inserted into an embedding hole in the ceiling. Between the instrument body and the reflector, a heat shield that shields heat is disposed,
The downlight according to claim 1, wherein the auxiliary top plate is formed integrally with the reflection plate or the heat shield plate.   The downlight according to claim 2, wherein the instrument main body has a gate shape that straddles the opening. The instrument body has an insertion port for inserting the auxiliary top plate,
The downlight according to claim 2, wherein the auxiliary top plate is attached to an upper portion of the instrument body or the top plate.   The downlight according to claim 1, wherein the auxiliary top plate is provided on an upper portion of the instrument main body, and is installed at a predetermined position by sliding the auxiliary top plate.   The downlight according to claim 1, wherein the auxiliary top plate is provided at an upper portion of the instrument main body, and is installed at a predetermined position by rotating the auxiliary top plate.   The downlight according to claim 3 or 5, wherein the socket is disposed below the auxiliary top plate across the insertion opening of the instrument body in the attached state.   The downlight according to claim 4 or 8, wherein the terminal block is provided on the auxiliary top plate.   The downlight according to any one of claims 1 to 9, wherein the top plate is longer than the auxiliary top plate.