JP2017117608A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To insulate a base and a main body of an appliance from each other, and to enhance the strength to prevent a connection part from being damaged, and to prevent a lighting fixture from falling even if a resin member melts due to high heat.SOLUTION: A first insulator 25 is covered penetrating a metal second connecting body 40 which is formed by combining a metallic cylindrical body 10 with a second insulator 35. A metal first connection body 16 is placed on the first insulator 25, and the second connection body 40 is rotated by 90 degrees. The second connecting body 40 is fixed to the first connecting body 16 by screws 42. Next, a base 7 is fastened to the first connecting body 16, and the lower end of the base 7 is fastened to a receiving part 27 of the first insulator 25. The strength can be improved by the metal first and second connecting bodies 16 and the cylindrical body 10. Since the screws 42 are fastened in the vertical direction, breakage can be prevented by applying only compression stress to the first and second insulators 25, 35.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a lighting fixture that is provided with a base attached to a socket suspended from a high place.

FIG. 25 shows a perspective view of a conventional luminaire main body 90 as viewed obliquely from above, and FIG. 26 shows a perspective view of the luminaire main body 90 as viewed obliquely from below. A large number of radiating fins 92 are integrally formed radially on the outside of the case main body 91 at the center of the luminaire main body 90.
Further, as shown in FIG. 26, a large number of light emitting diodes 93 are disposed on the lower surface of the case main body 91, and a lens or a cover is mounted on the irradiation surface side of the light emitting diodes 93.

  In the center of the upper surface of the luminaire main body 90, a cylindrical connecting portion 94 is provided from the case main body 91, and a base 95 is attached to the upper end of the connecting portion 94. A base 95 of the luminaire main body 90 is attached to a socket suspended from a high place such as a ceiling.

  27 shows a perspective view of the connecting portion 94 with the base 95 removed, and FIG. 28 shows a cross-sectional view of the connecting portion 94. A screw portion 96 for screwing with the base 95 is screwed around the upper portion of the connecting portion 94. The connecting portion 94 is made of a synthetic resin.

When the base 95 is strongly twisted to screw and attach the base 95 to the screw part 96 of the connection part 94, the tensile load is concentrated on the base of the screw part 96 indicated by the arrow in FIG. If it is made of resin (for example, made of polycarbonate), it may break.
Moreover, when the connection part 94 was exposed to high heat, it melt | dissolved because it was made of a synthetic resin, and there existed a problem that the lighting fixture main body 90 fell from a socket.

The present invention has been provided in view of the above-described problems, and provides a lighting apparatus having at least the following objects.
(1) Insulate the base and the instrument body.
(2) To increase the strength and prevent the connecting portion from being damaged.
(3) To prevent the luminaire from falling even if the resin member melts due to high heat.

Therefore, in the lighting fixture according to claim 1 of the present invention, the fixture main body 2 provided with the light source, and the connecting portion 3 having a base 7 on the upper portion and connected to the fixture main body 2 structurally and in circuit. In a lighting fixture having
A connecting body connected to the base 7, a cylindrical body 10 whose lower part is connected to the instrument body 2, and an insulator interposed between the connecting body and the cylindrical body 10. Yes.

  In the lighting fixture of Claim 2, the said connection body and the said cylinder 10 are metal, It is characterized by the above-mentioned.

In the lighting fixture of Claim 3, the said connection body is:
A metal first connecting body 16 having a through-hole 20 at a substantially central portion and having a screw portion 17 for screwing the base 7 into an outer peripheral surface, and the through-hole 20 of the first connecting body 16 are inserted. The upper part is composed of a second connection body 40 connected to the first connection body 16,
The insulator is
A first insulator 25 disposed on the lower surface side of the first connection body 16 and having a through-hole 26 through which the second connection body 40 penetrates at a substantially central portion, and the first insulator 25. And a through-hole 37 through which the second connection body 40 penetrates at a substantially central portion. The receiving portion 44 of the second connection body 40 allows the second connection body 40 to A second insulator 35 to be held,
The upper portion of the cylindrical body 10 is held by the first insulator 25 and the second insulator 35, and the second connecting body 40 is penetrated through a substantially central portion of the cylindrical body 10. A through-hole 33 through which the insulator 35 is passed,
The first connecting body 16 and the second connecting body 40 are screwed in the vertical direction.

  In the lighting fixture according to claim 4, a fixing piece 41 protruding in a lateral direction is provided on an upper portion of the second connection body 40, and the through hole 20 of the first connection body 16 has the When the second connecting body 40 is rotated approximately 90 degrees after passing through the second connecting body 40, the dimension between the two fixed pieces 41 is the width of the through-hole 20 of the first connecting body 16 The second connecting body 40 is screwed to the first connecting body 16 by a fixing piece 41.

  The lighting fixture according to claim 5 is characterized in that the outer diameter of the receiving portion 44 of the second connecting body 40 is made larger than the inner diameter of the through-hole 33 of the cylindrical body 10.

  According to the lighting fixture of the first aspect of the present invention, the fixture main body 2 provided with the light source, and the connecting portion 3 having the base 7 at the upper portion and connected to the fixture main body 2 in a structural and circuit manner. A connecting body connected to the base 7, a cylinder 10 whose lower part is connected to the apparatus body 2, and an insulator interposed between the connecting body and the cylinder 10. Therefore, it is possible to insulate the connection body connected to the base 7 and the cylindrical body 10 connected to the instrument body 2 side, and prevent the instrument body 2 side from being charged.

  According to the lighting fixture of Claim 2, the said connection body and the said cylinder 10 are metal, Even when the connection body side is tinged with electric charge, the luminaire main body 2 side is tinged with electric charge by an insulator. Can be prevented. Further, the strength can be improved by the metal connection body. Thereby, it can prevent that the connection part 3 is damaged.

According to the lighting fixture of Claim 3, the said connection body is provided with the through-hole 20 in the approximate center part, and the metal 1st connection body which has the screw part 17 which screws the said nozzle | cap | die 7 in an outer peripheral surface. 16 and a second connection body 40 that is inserted through the through-hole 20 of the first connection body 16 and the upper part is coupled to the first connection body 16.
The insulator is disposed on the lower surface side of the first connection body 16, and the first insulator 25 having a through-hole 26 through which the second connection body 40 penetrates in the substantially central portion, and the first 1 is provided on the lower surface side of the insulator 25, and has a through-hole 37 through which the second connection body 40 penetrates in a substantially central portion, and the second connection body 40 receives the second through the receiving portion 44. And the second insulator 35 held by the connection body 40,
The upper portion of the cylindrical body 10 is held by the first insulator 25 and the second insulator 35, and the second connecting body 40 is penetrated through a substantially central portion of the cylindrical body 10. A through-hole 33 through which the insulator 35 is passed,
Since the first connecting body 16 and the second connecting body 40 are screwed in the vertical direction, each component of the connecting portion 3 can be obtained by tightening the base 7 with respect to the first connecting body 16. Is fixed. That is, as shown in FIG. 23, when the base 7 is tightened with respect to the first connection body 16, a force that pushes the first connection body 16 upward as indicated by an arrow A is generated. As shown by the arrow B, the insulator 25 is pressed downward.
Further, the second connection body 40 screwed to the first connection body 16 is pushed upward as indicated by an arrow C. Further, the second insulator 35 supported by the second connection body 40 is pushed upward as indicated by an arrow D. Then, the cylindrical body 10 covering the second insulator 35 is pushed upward as indicated by an arrow E. Further, the first insulator 25 placed on the upper surface of the cylindrical body 10 is pushed upward as indicated by an arrow F, but the first insulator 25 is pushed downward by the base 7. Fixed to.
In this way, by tightening the base 7 with respect to the first connection body 16, each constituent member of the connecting portion 3 is fixed, and rattling of each constituent member can be prevented.

  According to the lighting fixture of claim 4, the fixing pieces 41 protruding in the lateral direction are respectively provided on the upper portion of the second connection body 40, and the through-hole 20 of the first connection body 16. When the second connection body 40 is rotated approximately 90 degrees after the second connection body 40 is passed through the second connection body 40, the dimension between the two fixed pieces 41 is the through-hole 20 of the first connection body 16. The second connection body 40 falls from the first connection body 16 because the second connection body 40 is screwed to the first connection body 16 by the fixing piece 41. Can be prevented.

  According to the lighting apparatus of claim 5, the outer diameter of the receiving portion 44 of the second connecting body 40 is larger than the inner diameter of the through-hole 33 of the cylindrical body 10, so that the first insulation is achieved. Even if the body 25 and the second insulator 35 are melted down by high heat, the receiving portion 44 of the second connecting body 40 does not fall out of the through-hole 33 of the cylindrical body 10, so that the cylindrical body 10, that is, the lighting fixture side falls. Can be prevented.

It is the perspective view seen from diagonally upward of the lighting fixture main body in embodiment of this invention. It is the perspective view seen from diagonally lower of the lighting fixture main body in embodiment of this invention. It is a perspective view of the cylinder in an embodiment of the invention. It is a front view of the connection part in embodiment of this invention. It is AA sectional drawing of FIG. 4 in embodiment of this invention. It is a disassembled perspective view of the connection part in embodiment of this invention. It is the perspective view seen from diagonally upward of the 1st connection body in embodiment of this invention. It is the perspective view seen from diagonally lower of the 1st connection body in an embodiment of the invention. (A)-(d) is the top view of the 1st connection body in embodiment of this invention, AA sectional drawing of (a), a bottom view, and a side view. It is the perspective view seen from diagonally upward of the 1st insulator in embodiment of this invention. It is the perspective view seen from diagonally lower of the 1st insulator in embodiment of this invention. (A)-(d) is a top view of the 1st insulator in embodiment of this invention, AA sectional drawing of (a), a bottom view, and a side view. It is the perspective view seen from diagonally upward of the 2nd insulator in embodiment of this invention. It is the perspective view seen from diagonally lower of the 2nd insulator in embodiment of this invention. (A)-(d) is a top view of the 2nd insulator in embodiment of this invention, AA sectional drawing of (a), a bottom view, and a side view. It is the perspective view seen from diagonally upward of the 2nd connection body in embodiment of this invention. It is the perspective view seen from the diagonally lower side of the 2nd connection body in embodiment of this invention. (A)-(e) is the top view of the 2nd connection body in embodiment of this invention, a front view, a bottom view, a side view, and AA sectional drawing of (d). (A) (b) is explanatory drawing which shows the assembly process of the connection part in embodiment of this invention. (A) (b) is explanatory drawing which shows the assembly process of the connection part in embodiment of this invention. (A) (b) is explanatory drawing which shows the assembly process of the connection part in embodiment of this invention. (A) (b) is explanatory drawing which shows the assembly process of the connection part in embodiment of this invention. It is operation | movement explanatory drawing at the time of fixing the nozzle | cap | die in embodiment of this invention to the 1st connection body. It is explanatory drawing when the 1st insulator and 2nd insulator in embodiment of this invention melted down. It is a perspective view of the lighting fixture main body seen from diagonally upward of the prior art example. It is a perspective view of the lighting fixture main body seen from diagonally downward of the prior art example. It is a perspective view of the cylinder of a prior art example. It is sectional drawing of the cylinder of a prior art example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a perspective view of the luminaire main body 1 according to the present invention as viewed obliquely from above, and FIG. 2 shows a perspective view of the luminaire main body 1 as viewed obliquely from below.

The luminaire main body 1 includes a lower main body 2 having a substantially circular portion and a substantially cylindrical connecting portion 3 projecting from the upper surface of the main body 2. A large number of light emitting diodes 4 are provided on the lower surface of the instrument body 2 as in the conventional example, and a substantially square case 5 is disposed on the upper surface of the instrument body 2.
A power supply unit for driving and lighting the light emitting diode 4 is housed in the case 5, and a large number of radiating fins 6 are radially formed integrally with the case 5 of the power supply unit.

The connecting portion 3 is disposed on the upper surface of the case 5 with screws, and a base 7 is attached to the upper end of the connecting portion 3. FIG. 3 is a perspective view of a substantially cylindrical tubular body 10 made of a metal, for example, an aluminum material, that constitutes the outer shell of the connecting portion 3. A rigid rib is provided around the lower portion of the tubular body 10. 11 is integrally formed.
A fixing base 12 for fixing to the case 5 of the instrument main body 2 is integrally formed from the lower edge of the cylindrical body 10.

FIG. 4 shows a front view of the connecting portion 3, but the rib 11 and the fixing base 12 that are not particularly related to the main part of the present invention are not shown for convenience of explanation. 4 and the subsequent drawings also depict the lower part of the cylindrical body 10 of the connecting portion 3 in a simplified manner.
FIG. 5 is a cross-sectional view taken along line AA in FIG. 4, and FIG. 6 is an exploded perspective view of the connecting portion 3.

  Next, each structural member of the connection part 3 is demonstrated. In FIG. 1 to FIG. 6, a base 7 is disposed at the upper part of the connecting portion 3, and an electrode 13 is provided at the upper end of the base 7. Around the base 7, a screw portion 15 as an electrode paired with the electrode 13 is threaded through an insulating material 14 for insulating the electrode 13.

As shown in FIG. 5, a first connection body 16 is disposed inside the base 7. FIG. 7 is a perspective view of the first connection body 16 as viewed obliquely from above, and FIG. 8 is a perspective view of the first connection body 16 as viewed from obliquely below.
9A is a plan view of the first connection body 16, FIG. 9B is a cross-sectional view taken along the line AA in FIG. 9A, and FIG. 9C is the first connection body 16. FIG. 4D shows a side view of the first connecting body 16.

The first connecting body 16 is made of metal, for example, aluminum material, and is formed in a substantially cylindrical shape as shown in FIGS. 7 to 9, and has a threaded portion of the base 7 on the outer peripheral portion. A threaded portion 17 for screwing with the inner surface of 15 is threaded.
The first connecting body 16 is formed with a through-hole 20 penetrating vertically. As shown in FIGS. 9A and 9C, the through-hole 20 is expanded in an arc shape on both sides of the central portion. The whole is formed in a substantially rectangular shape.

Further, as shown in FIGS. 7 and 9A and 9B, the upper surface of the first connection body 16 is formed with step portions 21 that are slightly recessed on both sides of the through-hole 20. The upper surface of 21 is a flat surface, and a screw hole 22 is threaded downward.
A stepped stopper 23 is formed on each stepped portion 21. Moreover, as shown in FIG.8 and FIG.9 (c), the circular-arc-shaped protrusion 24 is integrally suspended by the both sides of the lower surface of the 1st connection body 16. As shown in FIG.

  FIG. 10 is a perspective view of the first insulator 25 disposed on the lower side of the first connecting body 16 as viewed from obliquely above. FIG. 11 is a perspective view of the first insulator 25 as viewed from obliquely below. A perspective view is shown. 12A is a plan view of the first insulator 25, FIG. 12B is a cross-sectional view taken along the line AA in FIG. 12A, and FIG. 12C is the first insulator 25. (D) is a side view of the first insulator 25, respectively.

The material of the first insulator 25 is made of an insulating material such as synthetic resin, and a central portion of the first insulator 25 has a through-hole penetrating vertically in the same shape as the through-hole 20. 26 is formed. Further, the upper portion of the first insulator 25 has a smaller diameter than the lower portion, and a flat portion on the outer peripheral side serves as a receiving portion 27.
On both sides of the through hole 26 on the upper surface of the first insulator 25, a substantially arc-shaped recess 30 is respectively provided, and the protrusion 24 of the first connector 16 is inserted into the recess 30. It is like that. In addition, substantially arc-shaped recesses 31 are also provided on both sides of the lower surface of the first insulator 25.

  As shown in FIG. 6, the lower portion of the substantially cylindrical tubular body 10 is opened, and a through-hole 33 similar to the through-hole 26 is formed in the upper portion of the tubular body 10. Further, arc-shaped convex portions 34 are integrally projected on both sides of the through hole 33 on the upper surface of the cylinder 10. The convex portion 34 is inserted into the concave portion 31 of the first insulator 25 and positioned.

FIGS. 13 to 15 show the second insulator 35, FIG. 13 shows a perspective view of the second insulator 35 as seen obliquely from above, and FIG. 14 shows the oblique view of the second insulator 35 from obliquely below. FIG.
15A is a plan view of the second insulator 35, FIG. 15B is a cross-sectional view taken along the line AA in FIG. 15A, and FIG. 15C is the second insulator 35. (D) is a side view of the second insulator 35, respectively.

  As a material of the second insulator 35, synthetic resin is used, and the second insulator 35 is formed in a substantially cylindrical shape. The lower surface of the second insulator 35 is open, and a projecting part 36 is integrally projected on the upper part. The projecting part 36 has a through hole similar to the through hole 33 penetrating vertically. 37 is perforated.

16 to 18 show the second connection body 40, FIG. 16 shows a perspective view of the second connection body 40 as seen obliquely from above, and FIG. 17 shows the second connection body 40 from obliquely below. FIG.
18A is a plan view of the second connection body 40, FIG. 18B is a front view of the second connection body 40, and FIG. 18C is a bottom view of the second connection body 40. The figure (d) shows the side view of the 2nd connection body 40, and the figure (a) has shown AA sectional drawing of (d), respectively.

The material of the second connection body 40 is made of metal, for example, aluminum material, and is formed in a substantially cylindrical shape having upper and lower surfaces opened. Fixing pieces 41 having a substantially U-shaped cross section are formed on both sides of the upper portion of the second connection body 40 so as to integrally protrude sideways. Insertion holes 43 through which screws 42 (see FIG. 6) are inserted are drilled in the bottoms of both fixed pieces 41, respectively. In addition, the shape of the upper part including the fixing piece 41 of the 2nd connection body 40 respond | corresponds to the shape of each said through-hole 20 ....
Further, a disc-shaped receiving portion 44 is integrally formed around the lower end of the second connection body 40 so as to protrude.

Next, the assembly process of the connection part 3 is demonstrated using FIGS. First, as shown in FIG. 19A, the second insulator 35 is covered with the second connector 40, and the upper portion of the second connector 40 is put into the through-hole 37 of the second insulator 35. To penetrate. In this state, the upper part of the second connection body 40 is in a state of protruding from the second insulator 35 (see FIG. 19B).
In this state, as shown in FIG. 5, since the receiving portion 44 of the second connection body 40 receives the second insulator 35, the second insulator 35 falls off from the second connection body 40. There is no.

  Next, as shown in FIG. 19B, the cylindrical body 10 is covered and the upper part of the second connecting body 40 is passed through the through-hole 33 of the cylindrical body 10. In this state, as shown in FIG. 5, since the cylindrical body 10 is received by the second insulator 35, the cylindrical body 10 does not fall off from the second insulator 35.

Next, as shown in FIG. 20A, the first insulator 25 is placed on the upper surface of the cylindrical body 10, and the projecting portion 36 of the second insulator 35 is placed inside the first insulator 25. Insert into. In this case, the upper portion of the second connection body 40 is passed through the through-hole 26 of the first insulator 25, and the convex portion 34 on the upper surface of the cylindrical body 10 is formed on the first insulator 25 as shown in FIG. 5. It is made to fit in the recessed part 31 provided in the lower surface.
Thereby, the first insulator 25 is positioned with respect to the cylindrical body 10.

  Next, as shown in FIG. 20B, the first connection body 16 is placed on the upper surface of the first insulator 25. In this case, as shown in FIG. 5, the protrusion 24 on the lower surface of the first connection body 16 is fitted into the recess 30 on the upper surface of the first insulator 25, so that the first connection body 16 is It will be positioned with respect to the insulator 25.

Next, as shown to Fig.21 (a), the 2nd connection body 40 is rotated 90 degree | times. When the second connecting body 40 is rotated by 90 degrees, the outer surface of the fixing piece 41 of the second connecting body 40 comes into contact with the stopper 23 of the first connecting body 16 so that the second connecting body 40 becomes the first connecting body 40. It is positioned with respect to the connection body 16.
As a result, as shown in FIG. 5, the fixing piece 41 of the second connection body 40 is positioned on the upper surface of the stepped portion 21 of the first connection body 16, and the fixing piece 41 of the second connection body 40. The insertion hole 43 is located at a position corresponding to the screw hole 22 of the first connection body 16.

  Next, as shown in FIG. 21B, the screw 42 is screwed into the screw hole 22 of the first connecting body 16 through the insertion hole 43 of the second connecting body 40 (see FIG. 5). As a result, the second connection body 40 and the first connection body 16 are fixed by the screw 42.

  Next, as shown in FIGS. 22 (a) and 22 (b), the base 7 is put on the first connecting body 16, and the screw portion 15 of the base 7 is screwed onto the screw portion 17 of the first connecting body 16. Then, the base 7 is fixed to the first connection body 16. By fixing to the first connecting body 16 until the peripheral edge of the lower end of the base 7 reaches the upper surface of the receiving part 27 around the first insulator 25, the assembly of the connecting part 3 is completed as shown in FIG. To do.

  Here, by tightening the base 7 with respect to the first connection body 16, each component of the connecting portion 3 is fixed. That is, as shown in FIG. 23, when the base 7 is tightened with respect to the first connection body 16, a force that pushes the first connection body 16 upward as indicated by an arrow A is generated. As shown by the arrow B, the insulator 25 is pressed downward.

Further, the second connection body 40 screwed to the first connection body 16 is pushed upward as indicated by an arrow C. Further, the second insulator 35 supported by the second connection body 40 is pushed upward as indicated by an arrow D. Then, the cylindrical body 10 covering the second insulator 35 is pushed upward as indicated by an arrow E. Further, the first insulator 25 placed on the upper surface of the cylindrical body 10 is pushed upward as indicated by an arrow F, but the first insulator 25 is pushed downward by the base 7. Fixed to.
In this way, by tightening the base 7 with respect to the first connection body 16, each constituent member of the connecting portion 3 is fixed, and rattling of each constituent member can be prevented.

  Thereby, conventionally, there is a possibility that the tensile load is concentrated on the base portion of the screw portion 96 of the cylindrical connecting portion 94 and the connecting portion 94 is cracked. In this embodiment, the cylindrical body 10 is made of an aluminum material. Since the first insulator 25 and the second insulator 35 made of synthetic resin are only subjected to compressive stress in the vertical direction, the first insulator 25 made of synthetic resin and the second insulator 35 It is possible to prevent the two insulators 35 from cracking.

Here, as shown in FIG. 5, the metal first connection body 16 and the second connection body 40 are in contact with the base 7 to which the power source is connected, and thus are charged. Since the metallic cylinder 10 is in contact with the fixture body 2 of the lighting fixture body 1, it is not good to charge the fixture body 2 side.
Therefore, in the present embodiment, the first insulator 25 and the second insulator 35 are interposed between the metal first connecting body 16 and the second connecting body 40 and the metal cylinder 10. As a result, the first insulator 25 and the second insulator 35 are used to insulate the metal first connecting body 16 and the second connecting body 40 from the metal cylinder 10. ing. Thereby, it is possible to prevent the device body 2 from being charged.

  FIG. 24 shows a case where the first insulator 25 and the second insulator 35 made of synthetic resin are melted away by high heat, and the first insulator 25 and the second insulator 35 are absent. Yes. Since the outer diameter of the receiving portion 44 of the metal second connection body 40 is formed larger than the inner diameter of the through-hole 33 of the cylindrical body 10, the first insulator 25 and the second insulator 35 are Even if it melts, the receiving portion 44 of the second connecting body 40 does not come out of the through-hole 33 of the cylindrical body 10, so that it is possible to prevent the cylindrical body 10, that is, the luminaire main body 1 side from falling.

  Thus, in this embodiment, since the metal is used for the 1st connection body 16, the 2nd connection body 40, and the cylinder 10 which are the structural members of the connection part 3, the intensity | strength of the connection part 3 is improved. Can be made. Thereby, it can prevent that the connection part 3 is damaged.

  In addition, a fixing piece 41 protruding in the lateral direction is provided on the upper portion of the second connection body 40, and after the second connection body 40 has passed through the through-hole 20 of the first connection body 16. When the second connection body 40 is rotated by approximately 90 degrees, the dimension between the two fixed pieces 41 is larger than the width dimension of the through-hole 20 of the first connection body 16, and the first connection body Since the second connection body 40 is screwed to the first connection body 16 by the fixing piece 41, the second connection body 40 can be prevented from dropping from the first connection body 16.

  In addition, as a kind of power supply supplied to this lighting fixture main body 1, there exists a case of an alternating current power supply and a direct current power supply. In the case where the power source to be supplied is a DC power source, a DC power source is once created from the AC power source by a power circuit, and this DC power source is supplied to the base 7 of the lighting fixture body 1.

DESCRIPTION OF SYMBOLS 1 Lighting fixture main body 2 Appliance main body 3 Connecting part 7 Base 10 Tube 16 1st connection body 17 Screw part 20 Through-hole 25 1st insulator 26 Through-hole 33 Through-hole 35 2nd insulator 37 Through-hole 40 4th Connection body 2 41 Fixing piece 42 Screw 44 Receiving part

Claims (5)

In a lighting fixture having a fixture main body (2) provided with a light source and a connecting portion (3) having a base (7) at the upper portion and structurally and circuitically connecting to the fixture main body (2),
A connection body coupled to the base (7);
A cylinder (10) whose lower part is connected to the instrument body (2);
The lighting fixture characterized by interposing an insulator between the said connection body and the said cylinder (10).   The lighting apparatus according to claim 1, wherein the connection body and the cylindrical body are made of metal. The connection body is
A metal first connecting body (16) having a through-hole (20) in a substantially central portion and having a screw portion (17) screwing the base (7) on an outer peripheral surface;
The upper part is composed of a second connection body (40) that is inserted through the through hole (20) of the first connection body (16) and is connected to the first connection body (16),
The insulator is
A first insulator (25) disposed on a lower surface side of the first connection body (16) and having a through-hole (26) penetrating the second connection body (40) in a substantially central portion; ,
The first insulator (25) is disposed on the lower surface side, and has a through-hole (37) penetrating the second connector (40) at a substantially central portion thereof, and the second connector ( 40) and a second insulator (35) held by the second connector (40) by the receiving part (44),
The upper part of the cylinder (10) is held by the first insulator (25) and the second insulator (35), and the second connecting body is provided at a substantially central portion of the cylinder (10). A through hole (33) for penetrating the second insulator (35) penetrating (40);
The lighting apparatus according to claim 1, wherein the first connection body (16) and the second connection body (40) are screwed in the vertical direction.   Fixing pieces (41) projecting in the lateral direction are respectively provided on the upper part of the second connection body (40), and the second connection body (40) has a through hole (20). When the second connecting body (40) is rotated approximately 90 degrees after passing through the connecting body (40), the dimension between the two fixed pieces (41) is the same as that of the first connecting body (16). The second connecting body (40) is screwed to the first connecting body (16) with a fixing piece (41). Item 4. A lighting apparatus according to item 3.   The lighting apparatus according to claim 3, wherein an outer diameter of the receiving portion 44 of the second connecting body (40) is larger than an inner diameter of the through hole (33) of the cylindrical body (10). .

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