JP2011159469A - Luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a luminaire, which is improved in installation workability to an installation surface, and can secure safety even if a terminal block which relays electric connection of a lamp to a power supply line gets into an abnormal heating state. <P>SOLUTION: The ceiling downlight (luminaire) 1 includes an installation plate 2, a chassis 11, a terminal block 15, and a lamp 21. The installation plate 2 is flame-retardant. The installation plate 2 is fixed to a ceiling surface (installation surface) and includes a power supply line lead-in portion. The chassis 11 is also flame-retardant. The chassis 11 is located with a space on the side distant from the ceiling surface of the installation plate 2 and connected to the installation plate 2. The terminal block 15 is fixed to the chassis 11 or the installation plate 2, and the terminal block 15 is covered with the chassis 11 and the installation plate 2. The lamp 21 is supported on the chassis 11 through a lamp socket 18 on the side opposite to the installation plate 2 across the chassis 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lighting fixture such as a ceiling downlight directly attached to an installation surface such as a ceiling surface.

  By fixing the adapter to which the electric wire drawn from the ceiling is connected to the ceiling surface with a screw, between the stepped portion of this adapter and the ceiling surface, an approximately ring shape attached to the surface light emitting portion of the donut shape The outer frame is fixed, and the GX53 type fluorescent lamp with the GX53 type base standardized by IEC (International Electrotechnical Commission) is attached to the adapter, and the fluorescent lamp is illuminated from the hollow part (inner peripheral surface) of the surface light emitting part. A direct-mounting luminaire that takes in light and causes a surface light emitting portion to emit light is known as a conventional technique (see, for example, Patent Document 1).

  The adapter of the luminaire described in this Patent Document 1 is directly attached with its upper surface in contact with the ceiling surface, and a wiring groove is formed on this upper surface where wiring drawn from the back of the ceiling is arranged. A screw hole through which a screw for direct attachment is passed upward and a concave portion into which the upward convex portion of the GX53 socket portion is fitted are provided. Therefore, the adapter has a case shape. The pair of connection fittings arranged in the adapter are electrically connected to the wiring drawn into the adapter from the wiring groove, and the pair of pin electrodes provided in the GX53 socket portion are electrically connected to the connection fitting. Connected to each other.

JP 2009-295425 A (paragraphs 0008-0035, FIGS. 1 to 5)

  According to the prior art, before the adapter is screwed to the ceiling surface, it is necessary to connect the wiring drawn from the back of the ceiling to the connection fitting in the adapter. This connection work must be done at the high ceiling. In addition, when the wiring drawn from the back of the ceiling is connected to the connection fitting in the adapter, the adapter itself is in the way and the work cannot be performed while visually checking the connection fitting. For this reason, the prior art described in Patent Document 1 has a problem that the installation workability of the lighting fixture on the installation surface such as the ceiling surface is not good.

  Therefore, the object of the present invention is to improve the installation workability on the installation surface, and to ensure the safety when the terminal block that relays the electrical connection between the lamp and the power supply line becomes abnormally heated. It is to provide a luminaire.

  In order to solve the above-mentioned problem, the invention of claim 1 includes a flame retardant installation plate having a power line lead-in portion and fixed to the installation surface; and the side away from the installation surface with respect to the installation plate A flame retardant chassis connected to the installation plate at a distance from each other; a terminal block fixed to the chassis or the installation plate and covered with the chassis and the installation plate; And a lamp supported via a lamp socket on the opposite side of the installation plate.

  In the present invention, the power line lead-in portion can be formed by, for example, a through hole opened in the installation plate, or can be formed by a groove opened in the peripheral edge of the installation plate. In this invention, the installation plate and the chassis are usually formed in a substantially flat plate shape by processing a convex part, a cut-and-raised piece, or a hole or a notch groove, etc. While it is possible to form with a flat plate that does not have these processed parts, as a flame-retardant material forming these installation plate and chassis, metals can be preferably mentioned, but even if it is a synthetic resin There is no problem. In this invention, the terminal block is in contact with one of the chassis and the installation plate to which it is fixed, but is in a state of being separated from the other or in contact with both, in other words, The terminal block may be sandwiched between the chassis and the installation plate. In the present invention, an LED lamp using an LED as a light emitting element, an incandescent lamp, a fluorescent lamp, or the like can be used as the lamp. The lighting apparatus of the present invention is not limited to being installed on the ceiling surface, and can be installed on the floor surface or a wall surface extending from the ceiling to the floor, and the present invention is described in the embodiments. It can be applied to direct lighting fixtures other than ceiling downlights.

  In order to install the lighting fixture of the invention of claim 1 on the installation surface such as the ceiling surface, first, in a state where the power line drawn from the installation unit such as the ceiling is passed through the power line drawing unit of the installation plate, The installation plate is fixed to an installation surface such as a ceiling surface. Next, after connecting the power line passed through the power line lead-in part to the installation board or the terminal block fixed to the chassis, the chassis is connected to the installation board, and the chassis is connected between the installation board and the installation board. A stand is arranged. Thereafter, the lamp can be supported on the chassis, so that the luminaire can be directly installed on the installation surface.

  According to this lighting apparatus, when connecting the power supply line to the terminal block in the installation work, the installation plate and the chassis are not easily disturbed, and are connected to the terminal block fixed in advance to the installation plate or the chassis. Since this power line can be connected to the terminal block while visually recognizing the power line, the installation workability on the installation surface can be improved.

  Furthermore, there is a possibility that the terminal block may become abnormally heated for some reason. However, since the terminal block is covered with a flame retardant installation board and chassis, even if the above abnormal heat generation occurs, the heat spreads around the installation surface, lamps, etc. Can be prevented by the installation plate and the chassis.

  According to a second aspect of the present invention, in the first aspect of the invention, the power line lead-in portion is formed by a through hole opened in a central portion of the installation plate, and the power supply line lead-in portion is opposed to the central portion of the chassis. The terminal block is shifted and fixed to the chassis, and a wire insertion hole into which the power line is inserted is opened on a side surface of the terminal block located on the power line lead-in portion side. Yes.

  According to the second aspect of the present invention, the power supply line passed through the power supply line lead-in portion formed of the through hole can be bent and inserted into the electric wire insertion hole opened in the side surface of the terminal block. In this case, the distal end portion (terminal block side end portion) of the power supply line may be bent into a substantially L shape, and the action of the terminal block side end portion returning to the free state is weak. Therefore, as the power line can be easily connected to the terminal block, the installation workability of the lighting fixture can be further improved.

  The invention of claim 3 is the invention of claim 1 or 2, wherein the installation plate and the chassis are made of metal, and these are connected via a metal spacer, and the peripheral edge of the chassis and the installation plate It is characterized in that it is open over the entire circumference between the peripheral part of the two.

  According to the third aspect of the present invention, the heat generated while the lamp is lit can be released to the chassis, and can also be released from the chassis to the installation plate via the spacer. In addition, since the space between the installation plate and the chassis is open over the entire circumference, the heat of the installation plate and the chassis can be released into the air flowing between the installation plate and the chassis. Therefore, it is possible to suppress an excessive temperature rise of the lamp.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the chassis forms a partition wall between a power line passed through the power line lead-in portion and the lamp socket.

  In the invention of claim 4, the terminal block side end of the power line drawn between the installation plate and the chassis is directly touched to the lamp socket that is heated by the heat of the lamp that generates heat during lighting and becomes high temperature. Blocked by the chassis. Therefore, it can suppress that the insulation coating of the terminal block side edge part of a power wire overheats abnormally exceeding the heat-resistant temperature defined by the Electrical Appliance and Material Control Law.

  According to the first aspect of the present invention, the installation workability on the installation surface can be improved, and the safety is ensured in the event that the terminal block that relays the electrical connection between the lamp and the power supply line becomes abnormally heated. There is an effect that can be done.

  According to the invention of claim 2, in the invention of claim 1, there is an effect that the installation workability of the luminaire can be further improved as the power supply line can be easily followed by the terminal block.

  According to the invention of claim 3, in the invention of claim 1 or 2, there is an effect that the temperature rise of the lamp can be further suppressed.

  According to the invention of claim 4, in the invention of claim 3, it is further suppressed that the insulation coating of the terminal block side end portion of the power line drawn between the installation plate and the chassis is abnormally overheated. There is an effect that can be done.

It is a perspective view shown in the state where the ceiling downlight concerning one embodiment of the present invention was visually recognized from the slanting lower side. It is a perspective view shown in the state where the ceiling downlight concerning one embodiment was visually recognized from the slanting upper side. It is sectional drawing which shows the ceiling downlight which concerns on one Embodiment. It is a perspective view showing the lighting cover of the ceiling downlight concerning one embodiment, and the assembly arranged in the inside in the state where it separated. It is a side view which shows the assembly arrange | positioned in the lighting cover of the ceiling downlight which concerns on one Embodiment.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.

  In FIG. 1 to FIG. 3, reference numeral 1 indicates a direct-mounted lighting fixture such as a ceiling downlight. The ceiling downlight 1 includes an installation plate 2, a chassis 11, a terminal block 15, a lamp socket 18, a lamp 21, a lighting cover 31, and the like.

  The installation plate 2 is a flame retardant material such as a metal, specifically an iron plate, and also has heat resistance. As shown in FIG. 2, the outer shape of the installation plate 2 is substantially circular, although it has a plurality of cutout grooves 3a on its peripheral portion. The installation plate 2 has a plurality of cut-and-raised pieces 3b on the periphery thereof as shown in FIGS. Each cut-and-raised piece 3b is in contact with an installation surface, for example, an indoor ceiling surface C (see FIGS. 3 and 5) of the building, and in order to separate the installation plate 2 from the ceiling surface C by a predetermined distance, 4 and 5 is bent upward).

  A power line lead-in part 4 (see FIG. 3) made of, for example, a circular through hole is opened at the center of the installation plate 2, and a ring-shaped power bush 5 is fitted into the power line lead-in part 4 Installed.

  As shown in FIGS. 2 and 4, the installation plate 2 is provided with a pair of screw projections 6 and 7 protruding from the back side of the installation plate 2 with the power line lead-in portion 4 interposed therebetween. One screwing portion 6 has a substantially dart hole-shaped fixing hole 6a. The other screwing portion 7 has a pair of fixing holes 7a and 7b.

  The installation plate 2 has a mounting screw (not shown) that is screwed into the ceiling surface C through the fixing hole 6a from the front side (the lower side in the figure) and one of the fixing holes 7a and 7b on the front side of the installation plate 2 ( It is fixed to the ceiling surface C by another mounting screw (not shown) that is inserted into the ceiling surface C through the lower side in the drawing.

  As shown in FIGS. 3 to 5, a plurality of, for example, two spacers 8 projecting to the front side of the installation plate 2 are attached by metal fixing screws 9. That is, the spacer 8 is made of a metal pipe having a polygonal outer periphery. At the same time, the installation plate 2 is provided with a spacer receiving portion 2a by forming a polygonal recess corresponding to the shape of one end (upper end in the figure) of the spacer 8. The fixing screw 9 passes through the spacer receiving portion 2a and is screwed into the spacer 8 with one end of the spacer 8 fitted to the spacer receiving portion 2a. Thereby, the spacer 8 is fixed in a state of being prevented from rotating with respect to the installation plate 2 and protrudes to the front side of the installation plate 2.

  The chassis 11 is a flame retardant material, for example, a metal plate, specifically an iron plate, and also has heat resistance. As shown in FIG. 4, the chassis 11 is made of, for example, a flat disk having a smaller diameter than the installation plate 2. The chassis 11 is connected to the installation plate 2 and is disposed so as to be opposed to the ceiling surface C on the side farther from the installation plate 2, specifically the front side of the installation plate 2.

  For this connection, a pair of substantially daruma-shaped connection holes 12 (see FIG. 4) are formed in the peripheral portion of the chassis 11. A connecting screw 13 with a metal washer (see FIG. 3) is screwed upward at the other end (lower end in the figure) of each spacer 8. The connecting operation using these connecting screws 13 is performed according to the following procedure.

  First, in a state where both the connecting screws 13 are not completely screwed, the heads of these connecting screws 13 are passed through the large-diameter hole portion of the connecting hole 12, and then the connecting screw 13 is inserted into the narrow hole portion of the connecting hole 12. The chassis 11 is rotated so that the screw shaft portion passes. As a result, the chassis 11 is temporarily held so as not to fall by being caught by the heads of the two connection screws 13, and the lower end surface (tip surface) of the spacer 8 faces the edge of the narrow hole portion of the connection hole 12. Close by. Next, the chassis 11 is fixed to the lower end portions of both spacers 8 by rotating the connecting screws 13 in the tightening direction. In this case, since the spacer 8 is fitted to the spacer receiving portion 2a as described above, the spacer 8 is not rotated with the connection screw 13 being screwed.

  By such connection, the chassis 11 is disposed substantially parallel to the installation plate 2. In this state, a space between the peripheral edge of the chassis 11 and the peripheral edge portion of the installation plate 2 is opened over the entire periphery of the instrument body including the installation plate 2, the chassis 11, and the spacer 8 (see FIG. 4). . Further, the central portion of the chassis 11 is closed without any holes. As a result, the chassis 11 serves as a partition wall between a power line lead-in portion, which will be described later, and the lamp socket 18.

  The terminal block 15 is used to relay a power line, which will be described later, to the lamp 21, and is disposed between the installation plate 2 and the chassis 11 as shown in FIGS. 3 to 5. Specifically, one of the installation plate 2 and the chassis 11, preferably in contact with the chassis 11, is fixed by screwing or the like. The terminal block 15 is covered with the installation plate 2 and the chassis 11 on both sides in the thickness direction, and is separated from the installation plate 2.

  The fixing position of the terminal block 15 to the chassis 11 is shifted from the center of the chassis 11 facing the power line lead-in portion 4 of the installation plate 2. The terminal block 15 has a wire insertion hole 16. This electric wire insertion hole 16 is opened in the side surface of the terminal block 15 located in the power wire drawing-in part 4 side. Here, the side surface on the power supply line lead-in part 4 side refers to the side face closest to the power supply line lead-in part 4 among, for example, four side faces that form a peripheral surface of the terminal block 15 and are continuous with each other. Therefore, the side surface in which the electric wire insertion hole 16 is opened and the power line lead-in portion 4 face each other up and down diagonally in FIG. The terminal block 15 incorporates a quick connection terminal (not shown) for electrically and mechanically connecting the core wire of the insulation-coated electric wire inserted into the electric wire insertion hole 16.

  The lamp socket 18 is fixed to the front surface (lower surface in the drawing) of the chassis 11 using screws (not shown). The lamp socket 18 has a G53-type base 19 (see FIG. 3) conforming to the IEC standard. A G53 type lamp 21 conforming to the IEC standard is attached to the base 19.

  As shown in FIG. 3, the lamp 21 includes a lamp base 22, a metal substrate 23, a plurality of light emitting sections 24, a reflector 25, a lamp cover 26, and the like.

  The lamp base 22 is made of aluminum die cast, and has a heat radiating fin 22a on the periphery thereof. The metal substrate 23 is composed of, for example, an aluminum base layer and an insulating layer laminated thereon, and the base layer is fixed to the lamp base 22 in close contact with the lamp base 22.

  Each light emitting section 24 has a plurality of LED (light emitting diode) chips mounted on the insulating layer, and a phosphor-containing sealing member that seals these chips. These light emitting sections 24 can emit a desired light color by mixing the emission color of the LED chip and the emission color emitted by the phosphor excited by this light, depending on the combination of the LED chip and the phosphor. It is preferable to use one that emits light. When the lamp 21 is lit, each light emitting section 24 emits light, and each LED chip generates heat, but this heat is transmitted to the lamp base 22 through the metal substrate 23, and heat is dissipated around the lamp base 22. It is discharged into the atmosphere from the fins 22a and the instrument body described later.

  The reflector 25 is screwed to the lamp base 22 so as to cover the metal substrate 23. The reflector 25 is a resin molded product, and has a plurality of reflecting mirror portions 25a that are individually continuous on the light emission side with respect to each light emitting portion 24, and the beam angle and the like by these reflecting mirror portions 25a. Is controlled. The lamp cover 26 is made of a diffuse translucent synthetic resin, and is attached to the lamp base 22 so as to cover the reflector 25 from the light emitting side. The lamp cover 26 is not essential for the lamp 21 and can be omitted.

  Note that reference numeral 20 in FIG. 3 denotes a pair of electrode pins attached to the lamp socket 18. These electrode pins 20 and the quick connection terminals in the terminal block 15 are electrically connected by an insulation coating electric wire (not shown) wired over them. Further, as the lamp 21 is attached to the lamp socket 18 to the electrode pin 20, a power receiving terminal (not shown) of the lamp 21 comes into contact, and the power receiving terminal and the electrode pin 20 are electrically connected. ing. In addition, the power receiving terminal is connected to a terminal portion of a wiring pattern (not shown) provided on the insulating layer of the metal substrate 23, so that power can be supplied to the lamp 21.

  The illumination cover 31 is made of a translucent material, preferably a diffuse translucent synthetic resin, and has a cylindrical shape with both axial ends open. The illumination cover 31 has a plurality of engaging protrusions 32 (see FIG. 4 and the like) on the inner peripheral surface of the installation surface side opening edge (upper end opening edge in the figure).

  The illumination cover 31 passes through the notch grooves 3a of the installation plate 2 screwed to the ceiling surface C so that the engagement projections 32 are positioned on the back side of the installation plate 2, and then these engagement projections By rotating the illumination cover 31 in the circumferential direction until 32 hits the cut and raised piece 3b, the back surface of the peripheral portion 3c (see FIG. 2) of the installation plate 2 sandwiched between the cutout groove 3a and the cut and raised piece 3b. The engaging projection 32 is hooked on the mounting plate 2 and attached to the installation plate 2. The lighting cover 31 covers the assembly including the installation plate 2, the chassis 11, the lamp socket 18, and the lamp 21, and the lamp cover 26 of the lamp 21 emits light from the lighting cover 31 as shown in FIG. It faces the side opening (lower end opening in the figure) 33.

  A procedure for installing the ceiling downlight 1 having the above-described configuration on the ceiling surface C as an installation surface will be described.

  First, a pair of spacers 8 are screwed in advance with fixing screws 9, and an installation plate 2 is prepared in which connecting screws 13 are respectively screwed into the lower ends of the spacers 8. A power line (not shown) drawn from the back of the ceiling is passed through the power line lead-in portion 4, and the installation plate 2 is fixed to the ceiling surface C in this state. As described above, this fixing operation is performed by passing the mounting screws through one of the fixing holes 7a and 7b and the fixing holes 6a from the lower side of the installation plate 2 and screwing these screws into the ceiling surface C. Thus, the installation plate 2 is fixed to the ceiling surface C so as to cover a part of this surface.

  Next, the chassis 11 to which the terminal block 15 is attached in advance is brought close to the installation plate 2, and in this state, the tip of the power supply line is inserted into the wire insertion hole 16 of the terminal block 15 so that the power supply line and the terminal block 15 are connected. Connecting. In this case, the installation plate 2 and the chassis 11 are unlikely to get in the way, and the power supply line can be connected to the terminal block 15 while visually confirming the terminal block 15 and the power supply line connected thereto, so that the installation workability can be improved. .

  In addition, at the time of the connection, the distal end portion of the power supply line can be bent into a substantially L shape and inserted into the electric wire insertion hole 16 opened in the side surface of the terminal block 15. The action of the end part) to return to the free state is weak. Such bending of the power supply line and the direction of insertion thereof are conceptually indicated by a two-dot chain line arrow in FIG. Therefore, as the power line can be more easily connected to the terminal block 15, the installation workability of the ceiling downlight 1 on the ceiling surface C can be further improved.

  On the other hand, when the terminal block 15 is fixed to the installation plate 2, it is necessary to bend the terminal block side end of the power line into a substantially U shape, and in such a bent state, the free state The resilience to return to is strong. Therefore, the connection work to the terminal block 15 must be performed while maintaining the bent state in the substantially U shape so that the terminal block side end bent in the approximately U shape does not return to the free state. So workability is not good.

  After connecting the power supply line, while pushing back the surplus drawer part of the power supply line to the back of the ceiling, the connection screw 13 is inserted into the pair of connection holes 12 of the chassis 11 and then the chassis 11 is rotated. The chassis 11 is temporarily held by the connecting screw 13. Thereafter, each connecting screw 13 is screwed in, and the pair of spacers 8 are sandwiched between the installation plate 2. Thus, the chassis 11 is connected to the installation plate 2 in a state in which heat conduction from the chassis 11 to the installation plate 2 can be performed via the spacer 8, and the terminal block 15 is provided between the chassis 11 and the installation plate 2. Arranged. Thus, the instrument body is assembled.

  In a state where this assembly is completed, the entire circumference of the instrument body, that is, the circumference of the installation plate 2 and the peripheral edge of the chassis 11 are opened over the entire circumference. It is possible to insert a finger or the like between Therefore, when the terminal block side end portion of the power line connected to the terminal block 15 drawn from the back of the ceiling in the assembled state of the appliance main body is in contact with the chassis 11, the terminal block side end portion of the power line Can be pushed up so that this part does not contact the chassis 11.

  Thereafter, the lamp socket 18 is screwed to the lower side of the chassis 11 and the lamp socket 18 and the terminal block 15 are electrically connected using an electric wire (not shown). Then, the lamp 21 is attached to the lamp socket 18 from the light emitting side (lower side in the figure). In this way, an assembly made up of components other than the lighting cover 31 is directly attached to the ceiling surface C.

  Finally, by attaching the illumination cover 31 that covers each of the components to the installation plate 2 according to the above-described installation procedure, all the installation work to the ceiling surface C of the ceiling downlight 1 is completed. The state directly attached to the ceiling surface C is shown in FIG.

  While the ceiling downlight 1 is lit, the LED chip included in each light emitting unit 24 of the lamp 21 generates heat. This heat is conducted to the lamp base 22 via the metal substrate 23 of the lamp 21, and is released to the outside from the heat radiation fin 22a. At the same time, part of the heat transmitted to the lamp base 22 is conducted to the metal chassis 11 via the lamp socket 18 and then to the metal installation plate 2 via the metal spacer 8. The A part of the heat generated by each light emitting portion 24 in this way can be released to the chassis 11, the spacer 8, and the installation plate 2, and can be emitted to the outside from these.

  The periphery of the chassis 11 and the periphery of the installation plate 2 are open over the entire periphery, and the lower end of the illumination cover 31 is opened by the light emitting side opening 33 of the illumination cover 31. Convection of outside air inside and outside the cover 31 is possible. Therefore, the heat radiated from the radiation fins 22 a of the lamp base 22, the chassis 11, the spacer 8, and the installation plate 2 can be released into the air flowing around the lamp base 22 and between the installation plate 2 and the chassis 11. .

  Therefore, the temperature rise of the light emitting part 24 of the lamp 21 can be suppressed. Accordingly, the light emission performance of the LED chip can be maintained, and the occurrence of color unevenness in each light emitting unit 24 can be suppressed.

  Furthermore, since the chassis 11 forms a partition wall between the lamp terminal 18 and the terminal block side end of the power supply line that is drawn into the instrument body and connected to the terminal block 15, the chassis 11 is heated by the lit lamp 21 and becomes high temperature. The chassis 11 can prevent the lamp socket 18 from being directly touched by the terminal block side end of the power line. Therefore, the insulation coating (usually made of vinyl chloride) at the terminal block side end of the power supply wire does not overheat abnormally beyond the heat resistance temperature (60 ° C in the case of the above materials) defined by the Electrical Appliance and Material Control Law. You can

  Further, while the ceiling downlight 1 directly attached to the ceiling surface C is lit, there is a possibility that the terminal block 15 may be abnormally heated for some reason. One of the causes is tracking when the overcurrent flows due to poor connection of the power line to the terminal block 15 or when water droplets condensed on the back of the ceiling enter the terminal block 15 through the power line. For example, a case where an excessive short-circuit current flows is considered.

  However, the terminal block 15 is covered from the upper and lower sides with the flame retardant installation plate 2 and the chassis 11. Therefore, even when the terminal block 15 is in an abnormally heated state as described above, the installation plate 2 and the chassis 11 prevent the heat from spreading around the ceiling surface C, the lamp socket 18, the lamp 21, and the like. it can. Therefore, the abnormal heat generation of the terminal block 15 is suppressed from damaging the surroundings, and the surrounding safety can be ensured.

  DESCRIPTION OF SYMBOLS 1 ... Ceiling downlight (lighting fixture), 2 ... Installation board, C ... Ceiling surface (installation surface), 4 ... Power line lead-in part, 8 ... Spacer, 11 ... Chassis, 15 ... Terminal block, 18 ... Lamp socket, 21 …lamp

Claims (4)

A flame-retardant installation plate having a power line lead-in portion and fixed to the installation surface;
A flame retardant chassis connected to the installation plate at a distance from the installation surface away from the installation surface;
A terminal block fixed to the chassis or the installation plate and covered with the chassis and the installation plate;
A lamp supported by the chassis via a lamp socket on the opposite side of the installation plate with the chassis as a boundary;
The lighting fixture characterized by comprising.   The power line lead-in part is formed by a through-hole opened in the center part of the installation plate, and the terminal block is fixed to the chassis by being shifted from the center part of the chassis facing the power line lead-in part. 2. The lighting apparatus according to claim 1, wherein a wire insertion hole into which the power supply line is inserted is opened on a side surface of the terminal block located on the power supply line lead-in side.   The installation plate and the chassis are made of metal, and these are connected via a metal spacer, and the periphery of the chassis and the periphery of the installation plate are open over the entire circumference. The lighting fixture according to claim 1 or 2, characterized in that   4. The lighting apparatus according to claim 3, wherein the chassis forms a partition wall between the lamp and the power line that is passed through the power line lead-in part.

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