JP2017050146A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of suppressing deterioration of heat radiation performance and capable of achieving a tensile force stopper having a simplified structure.SOLUTION: A lighting fixture includes: a light source 30; a fixture body 10 in which the light source 30 is arranged inside, and which includes a heat radiation fin 14 and a base part 13 in which a heat radiation fin 14 stands; a power supply part 80 for supplying power to the light source 30; and an electric wire 90 in which one end is electrically connected to the light source 30, and the other end is electrically connected to the power supply part 80. The base part 13 has a first surface 13a and a second surface 13b opposing to the first surface 13a. At the base part 13, a first insertion hole 131 and a second insertion hole 132 are formed for penetrating between the first surface 13a and the second surface 13b. The electric wire 90 is inserted in the first insertion hole 131 and the second insertion hole 132. Out of the electric wire 90, the portion from the first insertion hole 131 to the second insertion hole 132 is arranged on the second surface 13b side.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a luminaire in which electric wires for power supply are arranged outside.

  A conventional lighting fixture, for example, a downlight, is a lamp having a light source composed of an LED, a power supply unit that outputs power to be supplied to the LED, and a power supply unit that supplies power to the light source separately from the lamp. (For example, patent document 1 and patent document 2).

  The lamp has a fixture main body in which a light source is attached and a radiation fin for dissipating heat from the light source is provided.

  One end of the electric wire is electrically connected to the light source by being connected to a connection terminal inside the instrument body, for example. On the other hand, the other end of the electric wire is drawn out of the instrument body through an insertion hole provided in the instrument body, and is connected to the power supply unit.

  Here, since both the lamp and the power supply unit are heavy, when tension such as the weight of the lamp is applied to the electric wire during construction of such a lighting fixture, the tension is not applied to both ends of the electric wire. It is necessary to provide a so-called tension stopper.

  For example, in the lighting fixture disclosed in Patent Document 1, a part of the heat dissipating fin provided in the fixture main body is cut out to form a housing portion for the electric wire, and a part of the electric wire drawn out from the fixture main body is used as the housing portion. Is housed in. Further, a method has been proposed in which the accommodated electric wire is wound around a projecting portion provided inside the accommodating portion, the accommodating portion is covered with a cover, and the electric wire is sandwiched between the cover and the instrument body.

  Moreover, in the lighting fixture disclosed by patent document 2, while forming the groove part for arrange | positioning an electric wire in an instrument main body, the method of attaching the tension | tensile_strength member which consists of a pressing piece for clamping the electric wire arrange | positioned at a groove part is also possible. Proposed.

JP 2012-48996 A JP 2014-235918 A

  However, in the lighting fixture disclosed in Patent Document 1, since the shape of the electric wire housing portion is complicated, the manufacturing cost increases. Furthermore, the dimension of an instrument main body becomes large by providing an accommodating part. Moreover, there is also a problem that the heat radiation performance of the heat radiating fins is lowered by forming the accommodating portion in a part of the heat radiating fins.

  Moreover, in the lighting fixture disclosed by patent document 2, since it is necessary to ensure the space for forming a groove part, the structure of a groove part is restrict | limited to the shape and dimension of an instrument main body. Moreover, the structure of the instrument main body becomes complicated with the formation of the groove. This increases the manufacturing cost of the instrument body. Moreover, since the pressing piece for pressing an electric wire to an instrument main body is required, there also exists a problem that component cost increases.

  Therefore, the present invention provides a lighting apparatus that can suppress a decrease in heat dissipation performance and can realize a tension stopper having a simplified configuration.

  In order to solve the above-described problems, an aspect of a lighting fixture according to the present invention includes a light source, a fixture main body including the light source disposed therein, and a heat sink fin and a base portion on which the heat sink fin is erected, and the light source. A power supply unit that supplies power to the light source, and an electric wire having one end electrically connected to the light source and the other end electrically connected to the power supply unit, the base including the first surface and the first A first insertion hole and a second insertion hole penetrating between the first surface and the second surface are formed in the base portion; Is inserted through the first insertion hole and the second insertion hole, and a portion of the electric wire from the first insertion hole to the second insertion hole is disposed on the second surface side.

  ADVANTAGE OF THE INVENTION According to this invention, the lighting fixture which can suppress the fall of heat dissipation performance and can implement | achieve the tension | tensile_strength stop which has the simplified structure can be provided.

FIG. 1 is a perspective view illustrating an appearance of a lighting apparatus according to an embodiment. FIG. 2 is a cross-sectional view of the lighting fixture according to the embodiment. FIG. 3 is a perspective view showing an appearance of the lamp according to the embodiment. FIG. 4 is a side view showing the appearance of the lamp according to the embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, component arrangement positions, connection forms, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment)
[1. overall structure]
First, a schematic configuration of a lighting fixture according to an embodiment will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a perspective view showing an appearance of a lighting fixture 1 according to the present embodiment.

  FIG. 2 is a cross-sectional view of the lighting fixture 1 according to the present embodiment. FIG. 2 shows a cross section passing through the optical axis J of the luminaire 1.

  In each figure, a direction parallel to the optical axis J is a y-axis direction, and two directions perpendicular to the optical axis J and perpendicular to each other are a z-axis direction and an x-axis direction. In the present embodiment, the y-axis direction is the vertical direction.

  The luminaire 1 is an embedded luminaire such as a downlight that illuminates light downward (floor, wall, etc.) by being embedded in a mounted portion such as a ceiling of a building. In the present embodiment, the luminaire 1 has a direction in which light is emitted from the luminaire 1 (light emission direction) as the front, and a direction opposite to the light emission direction as the rear. That is, when the ceiling surface on which the luminaire 1 is installed is used as a reference, the floor side direction (downward) from the ceiling surface is the front side, and the upper side direction (upward) from the ceiling surface is the rear side. Moreover, the y-axis direction negative side is the front, and the y-axis direction positive side is the rear.

  As shown in FIGS. 1 and 2, the lighting fixture 1 includes a lamp 2, a power supply unit 80, and an electric wire 90. As shown in FIG. 2, the lamp 2 includes a fixture main body 10, a frame body 20, a light source 30, a reflecting member 40, an optical member 50, and a tubular member 60.

  Hereinafter, each component (component) of the lighting fixture 1 will be described in detail with reference to FIGS. 1 and 2. Although details are not shown or described in detail, the lighting fixture 1 is appropriately provided with a locking portion for connecting and fixing the constituent members.

[1-1. Instrument body]
As shown in FIG. 2, the fixture body 10 is the main body of the lighting fixture 1 and includes a light source 30 therein. The instrument body 10 functions as a mounting base to which the light source 30 is attached. The instrument body 10 also functions as a heat sink that dissipates heat generated by the light source 30. Therefore, the instrument main body 10 is good to be comprised with material with high heat conductivity, such as a metal material. The instrument body 10 is made of, for example, aluminum die casting made of aluminum.

  As shown in FIG. 2, the instrument main body 10 includes a shade portion 11, an attachment portion 12, a base portion 13, and a radiation fin 14. Hereinafter, the configuration of the instrument body 10 will be described with reference to FIG. 3 in addition to FIGS. 1 and 2.

  FIG. 3 is a perspective view showing an appearance of the lamp 2 according to the present embodiment.

  As shown in FIG. 2, the attachment portion 12 is a trapezoidal portion to which the light source 30 is attached. A light source 30 is disposed on the front side of the mounting portion 12, and a base portion 13 and a plurality of radiating fins 14 are erected on the rear side of the mounting portion 12. Thereby, the heat generated by the light source 30 is efficiently conducted to the base portion 13 and the plurality of radiating fins 14. The attachment portion 12 is formed with a drawing hole 121 for drawing the electric wire 90 from the inside of the instrument body 10 to the outside. The electric wire 90 electrically connected to the light source 30 inside the instrument main body 10 is inserted through the extraction hole 121 and extracted to the outside, and is connected to the power supply unit 80.

  As shown in FIG. 2, the shade portion 11 is a cylindrical portion that is provided on the periphery of the attachment portion 12 and surrounds the optical axis J of the light source 30. The light emitted from the luminaire 1 is emitted from the front end portion of the shade portion 11. A reflection member 40, an optical member 50, and a cylindrical member 60 are disposed inside the shade portion 11.

  1-3 is a heat radiating part in which a plurality of heat radiating fins 14 are erected. The base portion 13 is erected on the rear side of the attachment portion 12. In the present embodiment, the base portion 13 is plate-shaped and has a first surface 13a and a second surface 13b facing away from the first surface 13a, as shown in FIGS. As shown in FIG. 2, a plurality of radiating fins 14 are erected on the first surface 13 a and the second surface 13 b of the base portion 13. In the present embodiment, the plurality of heat radiating fins 14 are plate-like, and are erected substantially vertically on the first surface 13a and the second surface 13b.

  The base 13 also functions as a tension stopper for the electric wire 90. As shown in FIG. 2, the base 13 is formed with a first insertion hole 131 and a second insertion hole 132 that penetrate between the first surface 13 a and the second surface 13 b. By inserting the electric wire 90 through the first insertion hole 131 and the second insertion hole 132, the base portion 13 functions as a tension stopper for the electric wire 90. The structure of the tension stop by the base 13 will be described later.

  The plurality of heat radiating fins 14 are plate-shaped heat radiating portions, and are provided on the rear side of the instrument body 10. The plurality of heat radiating fins 14 are erected on the base portion 13 as shown in FIGS. In the present embodiment, as shown in FIGS. 2 and 3, the plurality of radiating fins 14 are erected on the attachment portion 12 and the base portion 13. Thereby, the heat generated by the light source 30 is efficiently conducted from the mounting portion 12 to the plurality of heat radiation fins 14.

[1-2. Frame]
The frame body 20 is a member for attaching the lamp 2 to an attached portion such as a ceiling. In the present embodiment, as shown in FIGS. 2 and 3, the frame body 20 is a substantially cylindrical member that surrounds the shade portion 11 of the instrument body 10. Moreover, in this Embodiment, it is comprised so that the emission direction of the emitted light from the lamp 2 can be changed by changing the relative angle of the instrument main body 10 with respect to the fixed frame 20. That is, the luminaire 1 according to the present embodiment is a universal downlight.

  The frame body 20 can be formed of, for example, a metal material such as aluminum.

[1-3. light source]
The light source 30 is a light emitting module, and is a light source that emits predetermined light radially. In the present embodiment, the light source 30 is a light emitting module having an LED. The light source 30 is configured to emit white light, for example. The light source 30 is configured by a COB (Chip On Board) type LED, and a base 302, a plurality of LEDs 304 that are bare chips (LED chips) mounted on the base 302, and the LEDs 304 are sealed to form a phosphor. And a sealing member. In this embodiment, the sealing member collectively seals all the LEDs 304, but the configuration of the sealing member is not limited to this. It is good also as a structure which forms a sealing member in the shape of a plurality of lines along the sequence direction of LED304 arranged in the shape of a line.

  The base 302 is a mounting substrate for mounting a plurality of LEDs 304, and is, for example, a ceramic substrate, a resin substrate, an insulating-coated metal base substrate, or the like. In addition, the base 302 is, for example, a plate having a flat surface that is rectangular in a plan view, and the bottom surface (rear surface) of the base 302 is attached to and fixed to the attachment portion 12 of the instrument body 10. The base 302 is formed with a pair of electrode terminals (a positive electrode terminal and a negative electrode terminal) for receiving DC power for causing the LED 304 (light source 30) to emit light from the outside (not shown).

  The light source 30 configured as described above is disposed inside the instrument main body 10. In this Embodiment, the light source 30 is being fixed to the front side of the attaching part 12 of the instrument main body 10 with the attachment member 32 and the connection member 36 which are shown by FIG.

  The attachment member 32 is a member for attaching the light source 30 to the attachment portion 12 of the instrument body 10. In the present embodiment, the attachment member 32 is a rectangular frame-like member, and regulates the position of the light source 30 in the direction perpendicular to the optical axis J. The attachment member 32 can be formed using resin materials, such as polybutylene terephthalate (PBT) and a polycarbonate, for example.

  The connection member 36 is a member for regulating the position of the light source 30 in the optical axis J direction. For example, the connection member 36 has a through-hole for allowing a screw to pass therethrough, and the connection member 36 is fixed to the attachment portion 12 and the attachment member 32 by a screw inserted into the through-hole. At that time, a part of the connection member 36 presses the light source 30 toward the mounting portion 12 to regulate the position of the light source 30 in the optical axis J direction (y-axis direction).

  The connection member 36 is also a member to which an electric wire 90 that supplies current to the light source 30 is connected. The luminaire 1 according to the present embodiment includes one connection member 36 at each end of the light source 30 in the z-axis direction. One connection member 36 has a high-potential-side wire and the other connection member 36 has a low potential. The side wirings are connected to each other. The connection member 36 is provided with electrodes (not shown) that supply current to the light source 30. The electrode is connected to an electrode terminal formed on the light source 30.

  The housing of the connection member 36 can be formed using a resin material such as PBT or polycarbonate, for example. The electrode of the connection member 36 can be formed using a conductive member such as copper.

[1-4. Reflective member]
The reflecting member 40 shown in FIG. 2 is a member that controls the light distribution from the light source 30. In the present embodiment, the reflecting member 40 reflects the light from the light source 30 toward the optical member 50. As shown in FIG. 2, the reflecting member 40 has a substantially cylindrical shape in which an opening through which the optical axis J passes is formed.

  As shown in FIG. 2, the reflecting member 40 has an inner diameter from the end on the side where the light from the light source 30 is incident (the positive side in the y-axis direction) toward the end where the light is emitted. It has a substantially cylindrical shape configured to gradually increase. The light from the light source 30 is reflected on the inner surface of the reflecting member 40.

  The reflecting member 40 can be formed using a hard white resin material such as PBT, for example. The reflecting member 40 may be provided with a metal film such as aluminum on the inner surface.

[1-5. Optical member]
The optical member 50 shown in FIG. 2 is a translucent member into which light from the reflecting member 40 is incident. The optical member 50 may have a function of controlling and emitting the light distribution of the light incident from the reflecting member 40. In the present embodiment, the optical member 50 is a Fresnel lens. The optical member 50 condenses the light from the reflecting member 40 and emits light having a substantially circular cross section.

  The optical member 50 is formed using a translucent material. For example, the optical member 50 can be formed using a transparent resin material such as PMMA (acrylic) or polycarbonate, or a transparent material such as a glass material.

[1-6. Cylindrical member]
The cylindrical member 60 is a member arrange | positioned at the inner surface of the shade part 11 of the instrument main body 10, as FIG. 2 shows. The cylindrical member 60 is disposed on the inner side of the shade part 11 and on the front side of the optical member 50.

  In the present embodiment, the inner surface (surface on the optical axis J side) of the cylindrical member 60 is a black glare suppressing surface. For this reason, the part ahead of the optical member 50 on the inner surface of the shade portion 11 is covered with the inner surface of the cylindrical member 60 that is a black glare suppressing surface. Thereby, the glare in the inner surface of the shade part 11 is suppressed.

  The inner surface of the cylindrical member 60 is not particularly limited as long as it is a black glare suppressing surface. The black glare-suppressing surface can be realized, for example, by applying a matte treatment to the surface painted black. Further, the black glare-suppressing surface can be realized by applying a texturing process to a surface coated with black or a surface made of a black member. Furthermore, in order to further suppress glare on the inner surface of the cylindrical member 60, a stepped portion (baffle) may be provided on the inner surface of the cylindrical member 60 as shown in FIG.

  The cylindrical member 60 can be formed using resin materials, such as a polycarbonate and PBT, for example.

[1-7. Power supply part]
The power supply unit 80 shown in FIGS. 1 and 2 is a power supply device that supplies power to the light source 30. For example, the power supply unit 80 includes a power supply circuit that generates power for causing the LED 304 of the light source 30 to emit light. Specifically, the power supply unit 80 converts AC power from an external power source such as a commercial power source into DC power of a predetermined level by rectification, smoothing, stepping down, and the like. The DC power generated by the power supply unit 80 is supplied to the light source 30 via the electric wire 90 and the connection member 36.

  The power supply unit 80 includes, for example, a printed circuit board and a plurality of electronic components mounted on the printed circuit board. The electronic component mounted on the circuit board is for lighting the light source 30. For example, a capacitive element such as an electrolytic capacitor or a ceramic capacitor, a resistive element such as a resistor, a rectifier circuit element, a coil element, a choke coil ( Choke transformer), a noise filter, a diode, or a semiconductor element such as an integrated circuit element. The power supply unit 80 may be combined with a dimming circuit, a booster circuit, or the like.

  The power supply unit 80 (power supply circuit) configured as described above is installed outside the instrument body 10. For example, the power supply unit 80 is housed in a metal or resin case, and is disposed on the back of the ceiling as a power supply box.

[1-8. Electrical wire]
As shown in FIG. 2, the electric wire 90 is a conductive wire for electrically connecting the light source 30 and the power supply unit 80. Specifically, the electric wire 90 is a power supply line for supplying DC power for lighting the light source 30 from the power supply unit 80 to the light source 30. The electric wire 90 has one end electrically connected to the light source 30 and the other end electrically connected to the power supply unit 80. One end of the electric wire 90 is electrically connected to the light source 30 fixed to the instrument main body 10, and the other end of the electric wire 90 is drawn out from the instrument main body 10 and electrically connected to the power supply unit 80.

  In the present embodiment, a pair of electric wires 90 are provided. One of the pair of electric wires 90 is a high-potential side first power line, and the other of the pair of electric wires 90 is a low-potential side second power line. Each of the pair of electric wires 90 is a lead wire constituted by, for example, a core wire made of a conductive material such as alloy copper and an insulating resin film covering the core wire. Core wires at both ends of each electric wire 90 are exposed to be connected to each of the connection member 36 and the power supply unit 80.

  Specifically, one end of each electric wire 90 is connected to a connector portion provided on the connection member 36. In the present embodiment, since the connector portion of the connecting member 36 is a quick connection terminal, the core wire exposed from one end of each electric wire 90 is inserted into the connector portion, thereby connecting the one end of the electric wire 90 and the connecting member 36 to the machine. And electrical connection. The connector portion of the connection member 36 is electrically connected to an electrode terminal provided on the base 302 of the light source 30.

  On the other hand, the other end of each electric wire 90 is connected to the output terminal of the power supply unit 80. For example, the other end of the electric wire 90 and the power supply unit 80 are mechanically and electrically connected by inserting the core wire exposed from the other end of each electric wire 90 into the output terminal of the power supply unit 80 that is a fast connection terminal. Can do.

  In addition, in this Embodiment, although the electric wire 90 and the light source 30 or the power supply part 80 were connected by the quick connection terminal, it does not restrict to this. For example, the electric wire 90 and the light source 30 or the power supply unit 80 may be electrically and mechanically connected by a conductive adhesive such as solder.

  As shown in FIGS. 1 and 2, in the present embodiment, the pair of electric wires 90 is covered with a protective tube 91. That is, two electric wires 90 are inserted through one protective tube 91. The protection tube 91 is a tube that protects the electric wire 90 and is formed of an insulating material. For example, the protective tube 91 is made of rubber that is elastically deformed, and is formed of an insulating resin material having elasticity such as an elastomer.

  The electric wire 90 is drawn out of the instrument body 10 through the drawing hole 121. The electric wire 90 drawn to the outside of the instrument body 10 is inserted into the first insertion hole 131 and the second insertion hole 132 in a bent state, and among the electric wires 90, the first insertion hole 131 to the second insertion hole 132 are inserted. The portion up to is arranged on the second surface 13b side of the base portion 13. By arranging the electric wire 90 in this way, the tension applied to the portion of the electric wire 90 between the second insertion hole 132 and the power supply unit 80 is inserted into the first portion of the electric wire 90 from the inside of the instrument body 10. Propagation to the portion up to the hole 131 can be suppressed. That is, in the present embodiment, the first insertion hole 131 and the second insertion hole 132 function as a tension stopper for the electric wire 90. In addition, the tension stop structure of the electric wire 90 will be described later.

  In the present embodiment, since the electric wire 90 is inserted through the protection tube 91, the protection tube 91 is inserted through the first insertion hole 131 and the second insertion hole 132 in a bent state.

[2. Tension stopper configuration]
Next, the tension stop structure of the electric wire 90 in the lighting fixture 1 which concerns on this Embodiment is demonstrated using FIG.2 and FIG.4.

  FIG. 4 is a side view showing an appearance of the lamp 2 according to the present embodiment. FIG. 4 shows an appearance of the first surface 13a of the base portion 13 in a plan view.

  As shown in FIG. 2, the electric wire 90 is drawn out of the instrument body 10 through the drawing hole 121. Here, the binding band 92 may be wound around the protective tube 91 in a portion of the protective tube 91 that covers the electric wire 90 that is disposed inside the instrument main body 10. Thereby, it can suppress that the electric wire 90 pulls out from the protection tube 91. FIG. Further, the diameter of the protective tube 91 is substantially the same as the diameter of the extraction hole 121, and the diameter of the portion of the protective tube 91 around which the binding band 92 is wound is larger than the diameter of the protective tube 91. Therefore, when the tension is applied to the portion of the electric wire 90 and the protective tube 91 that is disposed outside the instrument main body 10, the portion of the protective tube 91 where the binding band 92 is not wound is pulled out from the extraction hole 121. However, in the portion of the protective tube 91 around which the binding band 92 is wound, the extraction hole 121 does not come out. For this reason, by winding the binding band 92 or the like around a portion of the protective tube 91 that is disposed inside the instrument main body 10, it is possible to suppress tension from being applied to the portion of the protective tube 91 and the electric wire 90. Thereby, when performing the operation | work which draws out the protection tube 91 and the electric wire 90 from the instrument main body 10, it can suppress that tension | tensile_strength is added to the electric wire 90 inside the instrument main body 10. FIG. That is, it is possible to suppress the tension from being applied between the electric wire 90 and the quick connection terminal inside the instrument body 10.

  As described above, it is possible to suppress the tension from being applied to the electric wire 90 inside the instrument body 10 by the binding band 92, but the tension that can be suppressed by the binding band 92 is relatively small. For example, when a tension of about the weight of the lamp 2 (for example, several kg) is applied to the protective tube 91 and the electric wire 90, the binding band 92 can be removed from the protective tube 91. Therefore, the lighting fixture 1 according to the present embodiment further includes a tension stop configuration using the first insertion hole 131 and the second insertion hole 132 formed in the base portion 13.

  As shown in FIG. 2, the protective tube 91 and the electric wire 90 drawn out of the instrument body 10 from the drawing hole 121 are inserted into the first insertion hole 131 and the second insertion hole 132. Specifically, portions of the protective tube 91 and the electric wire 90 from the lead-out hole 121 to the first insertion hole 131 are arranged on the first surface 13a side of the base 13 and the first insertion hole 131 to the second insertion hole. The portion up to 132 is arranged on the second surface 13 b side of the base portion 13. Moreover, the part from the 2nd penetration hole 132 to the power supply part 80 among the protection tubes 91 and the electric wires 90 is arrange | positioned at the 1st surface 13a side of the base 13 at least in the 2nd penetration hole 132 vicinity.

  In this Embodiment, as FIG. 2 shows, the part from the 1st penetration hole 131 to the 2nd penetration hole 132 among the protection tubes 91 and the electric wires 90 is bent in a U shape. For this reason, for example, when tension is applied to the portion of the protective tube 91 and the electric wire 90 from the second insertion hole 132 to the power supply unit 80, first, friction force is generated between the second insertion hole 132 and the protection tube 91. Arise. Moreover, the protection tube 91 and the electric wire 90 in the vicinity of the second insertion hole 132 are bent substantially at right angles by the tension. That is, since the radius of curvature of the protection tube 91 and the electric wire 90 in the vicinity of the second insertion hole 132 is reduced, the protection tube 91 is strongly pressed by the second insertion hole 132 by the elastic force of the protection tube 91 and the electric wire 90. Thereby, the frictional force between the second insertion hole 132 and the protective tube 91 is further increased. For this reason, it is suppressed that the said tension | tensile_strength applies to the part from the 2nd penetration hole 132 to the 1st penetration hole 131 among the protection tube 91 and the electric wire 90. FIG.

  Further, when the tension is applied from the second insertion hole 132 to the first insertion hole 131 in the protection tube 91 and the electric wire 90, the protection tube 91 and the electric wire 90 in the vicinity of the first insertion hole 131 are substantially perpendicular. Bend. That is, the curvature radius of the protection tube 91 and the electric wire 90 in the vicinity of the first insertion hole 131 is reduced. For this reason, the protection tube 91 is strongly pressed by the first insertion hole 131 by the elastic force of the protection tube 91 and the electric wire 90. Thereby, the frictional force is further increased between the first insertion hole 131 and the protective tube 91. Therefore, it is suppressed that the said tension | tensile_strength applies to the part from the 1st penetration hole 131 to the extraction hole 121 among the protection tube 91 and the electric wire 90. FIG.

  In order to increase the frictional force between the first insertion hole 131 and the second insertion hole 132 and the protective tube 91, the diameters of the first insertion hole 131 and the second insertion hole 132 are substantially the same as the thickness of the protective tube 91. It is preferable that they match. Further, when the protective tube 91 is not used, it is preferable that the diameters of the first insertion hole 131 and the second insertion hole 132 substantially coincide with the thickness of the electric wire 90. Here, the thickness of the protective tube 91 and the electric wire 90 means the maximum dimension (maximum diameter) in their cross section. In the present embodiment, the diameter of the extraction hole 121, the first insertion hole 131 and the second insertion hole 132, and the thickness of the protective tube 91 are about 7 to 8 mm.

  The shorter the center-to-center distance between the first insertion hole 131 and the second insertion hole 132, the better the performance as a tension stopper, but it is difficult for the protective tube 91 and the electric wire 90 to be inserted. Considering the performance and workability of the tension stopper, the center distance is preferably about 3 to 10 times the thickness of the protective tube 91 or the electric wire 90. In the present embodiment, the center-to-center distance is about 50 mm.

  The deterioration of the heat dissipation performance in the base 13 due to the formation of the first insertion hole 131 and the second insertion hole 132 in the base 13 is negligible. However, in order to further reduce the amount of decrease in heat dissipation performance, the arrangement of the first insertion hole 131 and the second insertion hole 132 is preferably a position where the influence on the heat dissipation performance is small, that is, a position far from the light source 30. At least one of the first insertion hole 131 and the second insertion hole 132 is disposed at a position closer to the end portion 13d farther from the light source 30 than the end portion 13c closer to the light source 30 of the base portion 13 shown in FIG. It is preferable. Accordingly, since at least one of the first insertion hole 131 and the second insertion hole 132 is disposed at a position close to the end portion 13d, that is, a position that is easily accessible by an assembly operator of the lighting fixture 1, the protective tube 91 and The operation of inserting the electric wire 90 into each insertion hole can be facilitated.

  Moreover, in this Embodiment, as FIG. 4 shows, the extraction hole 121, the 1st insertion hole 131, and the 2nd insertion hole 132 are arrange | positioned in the same straight line L shape in planar view of the 1st surface 13a. Yes. Thereby, since it is not necessary to bend the protective tube 91 and the electric wire 90 in the direction perpendicular to the straight line L, the operation of inserting the protective tube 91 and the electric wire 90 through the extraction hole 121, the first insertion hole 131, and the second insertion hole 132 is performed. Can be facilitated.

  As described above, in the lighting fixture 1 according to the present embodiment, the tension applied from the second insertion hole 132 to the power supply unit 80 among the protective tube 91 and the electric wire 90 is the main body of the protective tube 91 and the electric wire 90. It can suppress adding to the part of 10 inside. Further, in the present embodiment, the tension stopper can be realized by a simplified configuration. For this reason, the cost increase by providing the structure of a tension stop can be suppressed. Moreover, in this Embodiment, the fall of the thermal radiation performance of the base 13 by providing a tension stop structure can be suppressed.

[3. Summary]
As described above, the lighting fixture 1 according to the present embodiment includes the light source 30, the fixture main body 10 including the base 13 on which the light source 30 is disposed, and the radiation fins 14 and the radiation fins 14 are erected. And a power supply unit 80 for supplying power to the power supply 30. The luminaire 1 further includes an electric wire 90 having one end electrically connected to the light source 30 and the other end electrically connected to the power supply unit 80. The base 13 has a first surface 13a and a second surface 13b facing away from the first surface 13a, and the base 13 has a first insertion hole 131 penetrating between the first surface 13a and the second surface 13b. And the 2nd penetration hole 132 is formed. The electric wire 90 is inserted through the first insertion hole 131 and the second insertion hole 132, and a portion of the electric wire 90 from the first insertion hole 131 to the second insertion hole 132 is disposed on the second surface 13b side. The

  Thereby, the fall of the heat dissipation performance in the base 13 can be suppressed, and a tension stopper having a simplified configuration can be realized. Since the structure of the tension stopper is simplified, an increase in cost due to the provision of the tension stopper structure can be suppressed.

  Moreover, in the lighting fixture 1 according to the present embodiment, the appliance main body 10 is formed with a drawing hole 121 for drawing out the electric wire 90 from the inside of the appliance main body 10 to the outside. The extraction hole 121, the first insertion hole 131, and the second insertion hole 132 may be arranged in the same straight line in the plan view of the first surface 13a.

  Thereby, the operation | work which inserts the protection tube 91 and the electric wire 90 in the extraction hole 121, the 1st insertion hole 131, and the 2nd insertion hole 132 can be facilitated.

  In the luminaire 1 according to the present embodiment, at least one of the first insertion hole 131 and the second insertion hole 132 is an end portion on the side farther from the light source 30 than an end portion on the side closer to the light source 30 of the base portion 13. It may be arranged at a position close to.

  Thereby, the fall of the heat dissipation performance accompanying forming the 1st penetration hole 131 and the 2nd penetration hole 132 in base 13 can be controlled further. In addition, since at least one of the first insertion hole 131 and the second insertion hole 132 is disposed at a position close to the end portion 13d, that is, a position that is easily accessible by an assembly operator of the lighting fixture 1, the protection tube 91 and the electric wire The operation of inserting 90 through each insertion hole can also be facilitated.

  Moreover, in the lighting fixture 1 which concerns on this Embodiment, even if the diameter of the 1st penetration hole 131 and the 2nd penetration hole 132 is substantially corresponded with the thickness of the protective tube 91 which covers the thickness of the electric wire 90, or the electric wire 90. Good.

  Thereby, since the frictional force between the protection tube 91 or the electric wire 90 and the 1st penetration hole 131 and the 2nd penetration hole 132 can be increased more, the performance of tension stop can be improved.

(Variations, etc.)
As mentioned above, although the lighting fixture 1 which concerns on this invention was demonstrated based on embodiment, this invention is not limited to the said embodiment.

  For example, in the above embodiment, the radiating fins 14 are erected on the mounting portion 12, but the radiating fins 14 are not necessarily erected on the mounting portion 12.

  Moreover, in the said embodiment, although the drawer hole 121 was provided in the attaching part 12, you may provide in the shade part 11. FIG. However, when the lighting fixture 1 is a universal downlight, the user removes the lead-out hole 121 and the protective tube 91 (or the electric wire 90) provided in the shade portion 11 from the gap between the frame body 20 and the fixture main body 10. Visible. Therefore, it is preferable that the extraction hole 121 is provided in the attachment portion 12.

  Moreover, in the said embodiment, although the electric wire 90 was penetrated by the protective tube 91, the protective tube 91 does not need to be used.

  Moreover, in the said embodiment, although COB type LED was used in the light source 30, you may use another light emitting element. For example, an SMD (Surface Mount Device) type LED may be used. Moreover, you may use other solid light emitting elements, such as an organic EL (Electro Luminescence) element, or other light sources other than a solid light emitting element.

  In addition, the present invention can be realized by various combinations conceived by those skilled in the art for each embodiment, or by arbitrarily combining the components and functions in each embodiment without departing from the spirit of the present invention. This form is also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 10 Appliance main body 13 Base 13a 1st surface 13b 2nd surface 13c, 13d End part 14 Radiation fin 30 Light source 80 Power supply part 90 Electric wire 91 Protection tube 121 Lead-out hole 131 1st insertion hole 132 2nd insertion hole

Claims (4)

A light source;
The instrument main body including the light source disposed inside, and a heat sink and a base on which the heat sink is erected,
A power supply for supplying power to the light source;
One end is electrically connected to the light source, and the other end includes an electric wire electrically connected to the power supply unit,
The base has a first surface and a second surface facing away from the first surface;
The base has a first insertion hole and a second insertion hole penetrating between the first surface and the second surface,
The electric wire is inserted through the first insertion hole and the second insertion hole,
Of the electric wire, a portion from the first insertion hole to the second insertion hole is disposed on the second surface side. In the instrument body, a lead-out hole is formed for drawing out the electric wire from the inside of the instrument body to the outside.
The lighting apparatus according to claim 1, wherein the extraction hole, the first insertion hole, and the second insertion hole are arranged in the same straight line in a plan view of the first surface. The at least one of the first insertion hole and the second insertion hole is disposed at a position closer to an end portion on the side farther from the light source than an end portion on the side closer to the light source of the base portion. The luminaire described. The luminaire according to any one of claims 1 to 3, wherein the diameters of the first insertion hole and the second insertion hole substantially coincide with a thickness of the electric wire or a protective tube covering the electric wire. .

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