JP6624546B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture.

  In a conventional lighting fixture, for example, a lighting fixture for a spotlight, a lamp body having an opening for emitting light, a light source mounted inside the lamp body, and a reflection controlling the light distribution of light emitted from the light source. A member, and a lens to which light from the reflecting member is incident.

  In the lighting fixture, a solid light emitting element such as an LED is employed as a light source (for example, Patent Document 1). LEDs have the features of having a long life and low power consumption. On the other hand, the luminous efficiency of the LED decreases due to a rise in temperature due to heat generation during lighting. Therefore, in the lighting fixture disclosed in Patent Literature 1, radiation fins are provided to suppress a temperature rise of the LED.

JP 2010-073654 A

  However, in the lighting device disclosed in Patent Literature 1, since the radiation fins are exposed to the outside, there is a problem that dust easily accumulates between the radiation fins, and the radiation efficiency is reduced by the dust. Moreover, in the lighting fixture 1, in order to remove dust from the heat radiation fins, it is necessary to clean the gaps between the heat radiation fins having a complicated shape, which requires a great deal of labor. Further, in terms of design, the exposed surface of the lighting fixture is required to have a simple appearance having no uneven structure, and thus it is not preferable that the radiation fins, screws, and the like are exposed to the outside.

  Therefore, the present invention provides a lighting fixture that can reduce the uneven structure on the exposed surface and has good heat dissipation efficiency.

  In order to solve the above problem, one embodiment of a lighting device according to the present invention includes a light source including a solid-state light-emitting element, a lamp body in which the light source is disposed, and a power supply circuit that supplies power to the light source. A power supply box, an arm having one end connected to the power supply box, and the other end connected to the lamp body, and an arm support base for supporting the arm, and the lamp body has a tube open at both ends. A cylindrical portion having a cylindrical shape, and a partition formed integrally with the cylindrical portion and partitioning the internal space of the cylindrical portion into a front space and a rear space, and, in the rear space, the cylindrical portion and the partition. A rear fin-like portion having a fin-like shape formed integrally with at least one of the partition walls, wherein the light source is mounted on a mounting surface that is one surface of the partition wall portion in the front space, and the rear fin-like portion is disposed rearward. It is arranged so that it does not come out of the light body from the space Arm support base, in the rear space, is fixed to the fixture, the arm is arranged on a side surface opening formed in the side surface of the cylindrical portion.

  ADVANTAGE OF THE INVENTION According to this invention, the unevenness | corrugation structure in an exposed surface can be reduced and the lighting fixture with good heat dissipation efficiency can be provided.

FIG. 1 is a perspective view illustrating an appearance of a lighting device according to an embodiment. FIG. 2 is a partially exploded perspective view of the lighting fixture according to the embodiment. FIG. 3 is a partially exploded perspective view of the lighting fixture according to the embodiment. FIG. 4 is a cross-sectional view of the lighting fixture according to the embodiment. FIG. 5 is a cross-sectional view of the lighting fixture according to the embodiment. FIG. 6 is a perspective view illustrating an appearance of the lighting fixture according to the embodiment. FIG. 7 is a perspective view illustrating an appearance of the lamp body according to the embodiment. FIG. 8 is a perspective view illustrating an appearance of the lamp body according to the embodiment. FIG. 9 is a cross-sectional view illustrating a configuration of a lighting device of a comparative example. FIG. 10A is a cross-sectional view illustrating a simulation result of a temperature distribution in the lighting fixture according to the embodiment. FIG. 10B is a cross-sectional view illustrating a simulation result of a temperature distribution in the lighting fixture of the comparative example. FIG. 11 is a cross-sectional perspective view showing an arrangement of components when a lead wire is inserted into an insertion hole of an arm in the lighting device according to the embodiment.

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

  Each drawing is a schematic diagram, and is not necessarily strictly illustrated. In each of the drawings, substantially the same components are denoted by the same reference numerals, and redundant description will be omitted or simplified.

(Embodiment)
[1. Constitution]
First, the configuration of the lighting fixture according to the embodiment will be described.

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

  FIG. 2 is a partially exploded perspective view of lighting device 1 according to the present embodiment. In FIG. 2, among the components of the lighting fixture 1, the lamp 10, the light source 30 disposed inside the lamp 10, and the light source 30 are arranged in front (on the positive side in the z-axis direction in FIG. 2) of the light source 30. The components to be performed are shown.

  FIG. 3 is a partially exploded perspective view of lighting device 1 according to the present embodiment. FIG. 3 shows the lamp 10 and the components disposed closer to the rear (the negative side in the z-axis direction in the figure) of the lamp 10 among the components of the lighting fixture 1.

  FIG. 4 is a cross-sectional view of lighting device 1 according to the present embodiment. FIG. 4 shows a cross-sectional view of the luminaire 1 along a cross section that passes through the optical axis J and is parallel to the yz plane in the drawing.

  FIG. 5 is a cross-sectional view of lighting device 1 according to the present embodiment. FIG. 5 is a cross-sectional view of the luminaire 1 taken along a section passing through the optical axis J and parallel to the zx plane in the figure.

  FIG. 6 is a perspective view showing the appearance of lighting device 1 according to the present embodiment. FIG. 6 mainly shows the rear part (the negative side in the z-axis direction in the figure) of the lighting fixture 1.

  As shown in FIGS. 1 to 3, the lighting fixture 1 is a spotlight, and mainly includes a lamp body 10, a light source 30, a mounting member 32, a connecting member 36, a reflecting member 40, an optical member 50, and a light control member. 60, an arm 70, a leaf spring 80 and a power supply box 90. Hereinafter, each component of the lighting fixture 1 will be described.

[1-1. Lantern]
The lamp body 10 is a member in which the light source 30 is disposed as shown in FIGS. The lamp body 10 also functions as a heat sink that radiates heat generated from the light source 30. Hereinafter, the lamp body 10 will be described in detail with reference to FIGS. 7 and 8 in addition to FIGS. 4 and 5.

  FIG. 7 is a perspective view showing the appearance of the lamp body 10 according to the present embodiment. FIG. 7 mainly shows the front space 121 side of the lamp body 10.

  FIG. 8 is a perspective view showing the appearance of lamp body 10 according to the present embodiment. FIG. 8 mainly shows the rear space 122 side of the lamp body 10.

  As shown in FIG. 4, the lamp body 10 is formed integrally with the cylindrical portion 11 having a cylindrical shape with both ends opened, and the inner space of the cylindrical portion 11 is moved forward. A partition 16 is provided to partition a space 121 and a rear space 122. In the present embodiment, the tubular portion 11 of the lamp body 10 is a substantially cylindrical tubular body. Since the partition 16 is formed integrally with the tubular portion 11, heat generated from the light source 30 can be efficiently conducted to the tubular portion 11. Here, since the cylindrical portion 11 is exposed to the outside, it is cooled by external air.

  As shown in FIG. 4, the lamp body 10 includes a front opening 111, a rear opening 112, and a side opening 113. The front opening 111 is an opening located in front (on the positive side in the z-axis direction in each drawing). The rear opening 112 is an opening located rearward (negative side in the z-axis direction in each drawing). The side opening 113 is a slit-shaped opening formed on the side surface of the tubular portion 11. As described above, the cylindrical portion 11 has a simple external shape with almost no uneven structure in a portion other than the side opening 113 on the side surface.

  As shown in FIGS. 4 and 5, in the front space 121 of the lamp body 10, the light source 30 is mounted on the mounting surface 161 which is one surface of the partition 16. As shown in FIG. 4, the mounting member 32, the reflecting member 40, the optical member 50, and the light control member 60 are arranged in the front space 121. Further, as shown in FIG. 5, a connection member 36 is further disposed in the front space 121.

  As shown in FIGS. 4 and 7, the lamp body 10 includes the light shielding wall portion 14 in the front space 121. The light shielding wall portion 14 is a portion that stands on the mounting surface 161 and surrounds the light source 30. In the present embodiment, the light-shielding wall portion 14 extends forward (on the positive side in the z-axis direction) from the mounting surface 161 and surrounds the light source 30. The light-shielding wall portion 14 is configured such that, of the light emitted from the light source 30, a part of the light leaked from the gap between the reflection member 40 and the mounting surface 161 (or the light source 30) is transmitted to the cylindrical portion 11 of the lamp body 10. Leakage between the reflection member 40 is suppressed. Thereby, light leakage from between the cylindrical portion 11 in front of the lighting fixture 1 (on the positive side in the z-axis direction in each drawing) and the reflecting member 40 can be suppressed.

  As shown in FIG. 7, the lamp body 10 includes a plurality of front fin-shaped portions integrally formed on at least one of the partition wall portion 16 and the cylindrical portion 11 in the front space 121. 15 is provided. The front fin portion 15 has a function of conducting heat from at least one of the partition wall portion 16 and the tubular portion 11 and dissipating heat. In the present embodiment, as shown in FIG. 7, the front fin-shaped portion 15 is formed integrally with both the tubular portion 11 and the partition 16. Thereby, the heat generated from the light source 30 is efficiently transmitted from the partition 16 to the cylindrical portion 11 through the front fin portion 15. Further, the front fin-shaped portion 15 is arranged so as not to go out of the lamp body 10 from the front space 121. Thereby, the uneven structure on the exposed surface of the lighting fixture 1 can be suppressed.

  As shown in FIG. 7, an insertion hole 162 and two through holes 164 are formed in the partition 16 of the lamp body 10. The insertion hole 162 is a hole through which a lead wire 92 for supplying power from the power supply circuit included in the power supply box 90 to the light source 30 is inserted, and is formed in the partition wall portion 16. The inner diameter of the insertion hole 162 is substantially the same as the outer diameter of the lead wire 92. This suppresses light from leaking from the insertion hole 162 to the rear space 122.

  The through hole 164 is a through hole for fixing the arm support base 20 that supports the arm 70 to the partition 16. The two screws 26 shown in FIG. 3 are screwed into the screw holes formed at the front end (positive side in the z-axis direction) of the arm support 20 through the through holes 164, so that the arm support 20 is partitioned. It is fixed to the section 16.

  As shown in FIGS. 4 and 8, the lamp body 10 includes a plurality of rear fins having a fin shape integrally formed in at least one of the cylindrical portion 11 and the partition 16 in the rear space 122. A section 17 is provided. The rear fin portion 17 is arranged so as not to go out of the lamp body 10 from the rear space 122. As shown in FIG. 8, at least two of the plurality of rear fin portions 17 are erected near an insertion hole 162 through which the lead wire 92 is inserted. The position of the lead wire 92 is regulated by the rear fin-like portion 17 which is provided near the insertion hole 162 and stands upright at a position sandwiching the insertion hole 162 in the x-axis direction. Therefore, the lead wire 92 can be easily arranged at a predetermined position. Further, when the lead wire 92 is inserted into the inside of the arm 70, the position of the lead wire 92 is regulated, so that the insertion operation can be easily performed. The position regulating function of the lead wire 92 will be described later.

  The lamp body 10 is formed of a metal material. In the present embodiment, the lamp body 10 is formed through, for example, an aluminum die casting process. The coating color of the outer surface of the lamp body 10 may be selected according to the use of the lighting fixture 1 or the like. In the present embodiment, the lamp body 10 is painted white.

[1-2. Arm support]
The arm support 20 is a member that supports the arm 70. The arm support base 20 is fixed to the lamp body 10 in the rear space 122 as shown in FIG. In the present embodiment, the arm support base 20 is fixed to the rear space 122 side of the partition 16.

  The arm support base 20 includes a radiator 28 that is thermally connected to the lamp body 10. As described above, in the present embodiment, the arm support base 20 is fixed to the partition 16 of the lamp body 10. Thereby, the heat radiating portion 28 of the arm support base 20 has a function of radiating heat generated from the light source 30. In the present embodiment, as shown in FIG. 6, the heat radiating section 28 is disposed on the rear side (the negative side in the z-axis direction) of the arm support base 20. The heat radiating portion 28 has an uneven shape and has an exposed surface exposed to the outside. In the present embodiment, the heat radiating portion 28 has a substantially disk shape, and a plurality of grooves are formed on the main surface on the side exposed to the outside along substantially the y-axis direction. The grooves increase the surface area of the heat radiating portion 28, so that the heat radiating efficiency can be improved.

  As shown in FIGS. 4 and 5, the heat radiating portion 28 closes the rear opening 112 which is the opening on the rear space 122 side of the lamp body 10. By closing the rear opening 112 by the heat radiating portion 28 in this manner, the plurality of rear fin-shaped portions 17, the lead wires 92, and the like arranged in the rear space 122 of the lamp body 10 are prevented from being visually recognized from the outside. it can. Note that the description “closed” does not necessarily mean complete sealing. For example, even if a gap required to insert the heat radiating portion 28 (that is, the arm support base 20 in the present embodiment) from the rear opening portion 112 is provided between the heat radiating portion 28 and the rear opening portion 112. Good. Further, it is only necessary that the heat radiating portion 28 is closed to the extent that almost the inside of the rear space 122 of the lamp body 10 is not visible.

  Further, an exposed surface 280 that is an outwardly facing surface of the rear space 122 of the heat radiating unit 28 is disposed inside the rear space 122. Thereby, even when the exposed surface 280 of the heat radiating portion 28 has an uneven structure as in the present embodiment, it is possible to suppress the uneven structure from being visible from outside the lighting fixture 1.

  The arm support base 20 includes an arm support 242 as shown in FIG. The arm support part 242 is a part that supports the arm 70. In the present embodiment, the cross section of the arm support 242 has a substantially semicircular shape, and corresponds to the shape of the other end 74 of the arm 70.

  The arm support base 20 is formed of a metal material. In the present embodiment, the arm support base 20 is formed through, for example, an aluminum die casting process. The paint color of the outer surface of the arm support 20 may be selected according to the use of the lighting fixture 1 or the like. In the present embodiment, the arm support base 20 is painted white like the lamp body 10.

[1-3. light source]
The light source 30 is a light source including a solid state light emitting device. As shown in FIGS. 4 and 5, the light source 30 is a light source that is disposed inside the lamp body 10 and emits light that is emitted from the lighting fixture 1. In the present embodiment, the light source 30 is a light emitting module having an LED (Light Emitting Diode), and is an LED light source that emits predetermined light radially. The light source 30 is configured to emit, for example, white light. The light source 30 includes a COB (Chip On Board) type LED, and as shown in FIG. 3, a base 302, a plurality of LEDs 304 which are bare chips (LED chips) mounted on the base 302, and A sealing member that seals the LED 304 and includes a phosphor. Note that, in the present embodiment, the sealing member collectively seals all the LEDs 304, but the configuration of the sealing member is not limited to this. A configuration in which the sealing member is formed in a plurality of lines along the arrangement direction of the LEDs 304 arranged in a line may be employed.

  The light source 30 is mounted on the mounting surface 161 of the partition 16 as shown in FIG. In the lighting fixture 1 shown in each drawing, the optical axis J of the light source 30 is in the z-axis direction in each drawing.

  The base 302 is a mounting substrate for mounting the plurality of LEDs 304, and is, for example, a ceramic substrate, a resin substrate, or a metal base substrate coated with insulation. The base 302 is, for example, a plate having a plane that is rectangular in plan view. The base 302 (the negative side in the z-axis direction in FIG. 2) is mounted on the mounting surface 161 of the partition 16. Fixed. Although not shown, 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 (the light source 30) to emit light from the outside.

[1-4. Mounting member]
The attachment member 32 is a member for attaching the light source 30 to the partition 16. As shown in FIG. 2, the mounting member 32 includes a regulating portion 322 and a second locking portion 324.

  The restricting unit 322 restricts the position of the light source 30 in the direction perpendicular to the optical axis J (x-axis direction and y-axis direction). The restricting portion 322 has a rectangular frame shape having an opening at the center. The opening formed in the center of the regulating portion 322 has a shape corresponding to the light source 30, and the light source 30 is arranged in the opening. The mounting member 32 is arranged on the mounting surface 161 of the partition 16 and is fixed to the partition 16 by the connecting member 36 and the screw 38. More specifically, a through hole 326 is formed in the regulating portion 322 of the mounting member 32, and the screw 38 is screwed into a screw hole formed in the partition wall 16 through the through hole 326, The mounting member 32 is fixed to the partition 16. Thereby, the mounting member 32 and the light source 30 arranged in the opening thereof are fixed to the partition 16.

  The second locking portion 324 is a claw-shaped portion for supporting the reflection member 40, and locks the second locked portion 440 of the reflection member 40 as shown in FIG. In the present embodiment, the mounting member 32 includes two second locking portions 324. The second locking portion 324 has a substantially L-shape, and an inclined surface (projection) protruding from the end of the second locking portion 324 in a direction away from the optical axis J is used as a second locked portion. The second locking portion 324 locks the second locked portion 440 by being inserted into the portion 440.

  The attachment member 32 can be formed using, for example, a resin material such as polybutylene terephthalate (PBT) or polycarbonate.

[1-5. Connection member]
The connection member 36 is a member to which a wiring (not shown) for supplying a current to the light source 30 is connected. As shown in FIG. 2, the lighting fixture 1 according to the present embodiment includes two connection members 36, and one connection member 36 has a high potential side wiring, and the other connection member 36 has a low potential side wiring. Wirings are connected respectively. The connection member 36 is provided with an electrode (not shown) for supplying a current to the light source 30. The electrode is connected to an electrode terminal formed on the light source 30.

  The connection member 36 also has a function of regulating the position of the light source 30. The connecting member 36 is formed with a through hole through which a screw 38 penetrates. The screw 38 inserted into the through hole fixes the connecting member 36 to the partition 16 and the mounting member 32. At this time, as shown in FIG. 5, the portion on the optical axis J side of the connecting member 36 presses the light source 30 toward the partition 16 to regulate the position of the light source 30 in the optical axis direction (z-axis direction). I do.

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

[1-6. Reflective member]
The reflection member 40 is a member that controls the distribution of light from the light source 30. In the present embodiment, the reflecting member 40 reflects light from the light source 30 toward the optical member 50, as shown in FIG. The reflection member 40 has a substantially cylindrical shape in which an opening through which the optical axis J passes is formed.

  The reflecting member 40 is configured such that the inner diameter gradually increases from the end on the side where light from the light source 30 is incident (negative side in the z-axis direction) toward the end on the side where the light is emitted. It has a substantially cylindrical shape. Light from the light source 30 is reflected on the inner surface of the reflection member 40.

  As shown in FIG. 5, a second locked portion 440 locked to the second locking portion 324 of the mounting member 32 is provided on the outer surface side of the reflection member 40. The second locked portion 440 is a hole provided in a member erected on the outer surface side of the reflection member 40. When the second locked portion 440 is locked by the second locking portion 324, the reflection member 40 is locked by the mounting member 32. Thereby, the reflection member 40 is attached to the partition 16 via the attachment member 32.

  As shown in FIG. 2, three third locking portions 410 are provided at the light emission side end of the reflection member 40. The third locking portion 410 is a claw-shaped portion that locks the optical member 50.

  The reflection member 40 can be formed using a hard white resin material such as polybutylene terephthalate (PBT).

[1-7. Optical member]
As shown in FIG. 4, the optical member 50 includes a light incident surface 510 on which light from the reflecting member 40 is incident, and a light exit surface 520 on which light incident on the light incident surface 510 is emitted. Material. The optical member 50 may have a function of controlling the light distribution of the light incident from the reflection member 40 and emitting the light. In the present embodiment, the optical member 50 is a Fresnel lens. Thereby, the lighting fixture 1 can form the spot-shaped illumination region by condensing the emitted light.

  As shown in FIG. 2, the optical member 50 is provided with three third locked portions 530 on a peripheral portion. In the present embodiment, third locked portion 530 is a portion having a concave shape provided on light emission surface 520 of optical member 50. The optical member 50 is locked to the reflecting member 40 by locking the third locked portion 530 of the optical member 50 to the third locking portion 410 of the reflecting member 40. Thereby, the optical member 50 is attached to the partition 16 via the reflection member 40 and the attachment member 32. Further, by arranging the optical member 50 at the end on the light emission side of the reflection member 40, the light emitted from the reflection member 40 is efficiently incident on the optical member 50.

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

[1-8. Light control member]
As shown in FIG. 4, the light control member 60 has an entrance opening 610 through which light emitted from the optical member 50 enters, and an exit opening 620 through which light incident on the entrance opening 610 exits. Further, it is a substantially cylindrical member disposed inside the lamp body 10 and on the light emitting surface 520 side of the optical member 50. The light control member 60 is separate from the lamp body 10 as shown in FIG.

  The light control member 60 is arranged such that the optical axis J passes through the entrance opening 610 and the exit opening 620 as shown in FIGS. Further, as shown in FIG. 4, the outer diameter of the emission opening 620 of the light control member 60 is substantially equal to the inner diameter of the front opening 111 of the lamp body 10. Thereby, it is possible to suppress the emission light passage area of the front opening 111 of the lamp body 10 from being reduced by the light control member 60. Further, it is possible to suppress the leakage of the emitted light from between the lamp body 10 and the light control member 60.

  As shown in FIG. 4, the light control member 60 is disposed near the front opening 111 of the lamp body 10 so that the emission opening 620 is located. The length of the light control member 60 in the optical axis J direction (z-axis direction) is approximately the length from the light exit surface 520 of the optical member 50 to the front opening 111 of the lamp body 10. Thus, the light control member 60 can cover a portion of the inner surface of the lamp body 10 from the vicinity of the light emitting surface 520 of the optical member 50 to the vicinity of the front opening 111 of the lamp body 10. Here, the inner surface (the surface on the optical axis J side) of the light control member 60 is a black glare suppressing surface. Thus, the inner surface near the front opening 112 of the lamp body 10 is covered with the inner surface of the light control member 60 which is a black glare suppressing surface. Thereby, glare on the inner surface near the front opening 112 of the lamp body 10 is suppressed.

  The inner surface of the light control 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 performing a matting process on a surface painted black. Further, the black glare suppressing surface can also be realized by subjecting a surface painted black or a surface made of a black member to graining. Further, in order to further suppress glare on the inner surface of the light control member 60, a step portion (baffle) may be provided on the inner surface of the light control member 60 as shown in FIG.

  The light control member 60 includes a first locked portion 660 on the outer periphery as shown in FIGS. The light control member 60 is held inside the lamp body 10 by the first locked portion 660 being locked by the first locking portion 114. In the present embodiment, first locked portion 660 has a convex shape and is locked by first locking portion 114 having a concave shape. Thus, the light control member 60 can be easily attached simply by inserting it into the front opening 111 of the lamp body 10. Therefore, in the lighting fixture 1 according to the present embodiment, a black glare suppressing surface can be more easily formed on the inner surface of the lamp 10 than when the inner and outer surfaces of the lamp 10 are separately painted.

  The light control member 60 can be formed using, for example, a resin material such as polycarbonate and PBT. As described above, by forming the light control member 60 using a resin material, the light control member 60 can be easily manufactured at low cost.

[1-9. arm]
The arm 70 is a member having one end 73 connected to the power supply box 90 and the other end 74 connected to the lamp body 10. In the present embodiment, as shown in FIG. 3, the arm 70 includes an arm body 72, one end 73, and the other end 74. The other end 74 has a substantially cylindrical rotating shaft protruding in opposite directions. In the present embodiment, the other end 74 includes a substantially cylindrical rotating shaft extending in a direction perpendicular to the optical axis J and the longitudinal direction of the arm 70. The arm 70 is rotatably attached to the arm support 20 by the other end 74 of the arm 70 being sandwiched between the leaf spring 80 and the arm support 242 of the arm support 20. That is, in the present embodiment, the arm 70 is connected to the lamp 10 via the arm support 20. As shown in FIGS. 4 and 6, the arm 70 is disposed in a side opening 113 formed on a side surface of the tubular portion 11. That is, the arm 70 is inserted into the lamp body 10 from the outside through the side opening 113.

  Hereinafter, the detailed configuration of the arm 70 will be described with reference to FIG.

  As shown in FIG. 4, an insertion hole 76 is formed inside the arm 70 in the longitudinal direction of the arm 70. A lead wire 92 is inserted into the insertion hole 76, and power is supplied from the power supply box 90 to the light source 30 via the lead wire 92. Thus, since the lead wire 92 is not exposed to the outside, damage to the lead wire 92 is suppressed. Further, since the lead wire 92 cannot be seen from the outside of the lighting fixture 1, it is preferable in terms of design.

  The arm 70 is formed of a metal material. In the present embodiment, the arm 70 is formed through, for example, an aluminum die casting process.

[1-10. Leaf spring]
The leaf spring 80 is an elastic member for rotatably attaching the arm 70 to the arm support base 20. In the present embodiment, the leaf spring 80 has a substantially C-shape as shown in FIG. 3, and is screwed together with the arm support base 20 while holding the other end 74 of the arm 70 therebetween. It is fixed to the arm support base 20 by 86 and 88. Thus, the arm 70 is attached to the arm support base 20.

  Since the other end 74 of the arm 70 is sandwiched between the leaf spring 80 and the arm support 20, the arm 70 is rotatable about the other end 74 with respect to the arm support 20. The torque required to rotate the arm 70 can be adjusted by adjusting the amount of screwing of the spring 88 that fixes the leaf spring 80 to the arm support 20. The screw 88 is arranged at a position that can be adjusted by a driver from the side opening 113 of the lamp body 10 in a state where the lighting fixture 1 is assembled. Thereby, the user can adjust the torque required to rotate the arm 70 without disassembling the lighting fixture 1.

  The leaf spring 80 is formed of a metal material. In the present embodiment, leaf spring 80 is formed of, for example, iron.

[1-11. Power box]
The power supply box 90 illustrated in FIG. 3 is a housing in which a power supply circuit that supplies power to the light source 30 is built. In the present embodiment, a power supply circuit built in power supply box 90 converts AC power supplied from outside power supply box 90 to DC power, and converts the DC power to LED 304 of light source 30 via lead wire 92. To supply.

  The outer wall portion of the power supply box 90 is formed from a metal material, a resin material, or the like. In the present embodiment, for example, the outer wall portion is formed of aluminum.

[2. Heat dissipation configuration]
Next, a heat radiation configuration of lighting device 1 according to the present embodiment will be described.

  In the lighting fixture 1, as described above, as shown in FIG. 4, the lamp body 10 is formed integrally with the cylindrical portion 11 having a cylindrical shape with both ends opened, A partition 16 is provided to partition the internal space of the tubular portion 11 into a front space 121 and a rear space 122. Further, the lamp body 10 includes a rear fin-like portion 17 having a fin-like shape formed integrally with at least one of the cylindrical portion 11 and the partition wall portion 16. The light source 30, which is a heat source, is disposed on the mounting surface 161 of the partition 16, as shown in FIG. Thereby, heat is efficiently conducted from the partition 16 to the tubular portion 11 formed integrally with the partition 16. Therefore, heat can be efficiently radiated without forming irregularities on the outer surface of the cylindrical portion 11. Further, in the present embodiment, as shown in FIGS. 4 and 8, the rear fin-shaped portion 17 is formed integrally with the tubular portion 11 and the partition 16 so that Heat can be conducted to the tubular portion 11 through the rear fin portion 17. Thereby, the heat radiation efficiency of the lighting fixture 1 can be further improved.

  Further, in the lighting fixture 1, as shown in FIG. 7, since the front fin portion 15 and the partition 16 are formed integrally, heat is conducted from the partition 16 to the front fin 15. Thereby, the heat generated from the light source 30 can be more efficiently dissipated. Furthermore, in the lighting fixture 1, as shown in FIG. 7, the light-shielding wall portion 14, the front fin-shaped portion 15, the cylindrical portion 11, and the partition wall portion 16 are integrally formed. Thereby, in the lighting fixture 1, since heat is efficiently conducted from the partition 16 to the cylindrical portion 11 via the light shielding wall 14 and the front fin portion 15, heat radiation efficiency can be improved. .

  Further, in the lighting fixture 1, as shown in FIG. 4, the heat radiation efficiency is further improved by thermally connecting the arm support base 20 having the heat radiation part 28 to the partition part 16.

  Here, in the lighting fixture 1 according to the present embodiment, the improvement of the heat conduction efficiency between the tubular portion 11 and the partition 16 by forming the tubular portion 11 and the partition 16 integrally is described. For this reason, the heat conduction efficiency of the lighting fixture of the comparative example is compared.

  FIG. 9 is a cross-sectional view illustrating a configuration of a lighting fixture 8 of a comparative example. FIG. 9 shows a cross section of the lighting fixture 8 along a cross section that passes through the optical axis J and is parallel to the yz plane, with the optical axis J of the lighting fixture 8 as the z-axis direction, as in FIG.

  As shown in FIG. 9, the lighting device 8 of the comparative example includes a light source 830, a reflecting member 840, an optical member 850, a light control member 860, and an arm 870, similarly to the lighting device 1 according to the present embodiment. The lighting fixture 8 includes a partition 816 and a tubular part 811 as in the lighting fixture 1. The light source 830 is mounted on the mounting surface 861 of the partition 816. On the other hand, in the lighting fixture 8, the partition 816 and the cylindrical portion 811 are not formed integrally. That is, the tubular portion 811 and the partition 816 are separate bodies. Further, in the lighting fixture 8, a fin-shaped heat radiating portion is integrally formed at a rear portion (negative side in the z-axis direction) of the partition wall portion 816. The result of simulating the heat conduction in the lighting fixture 8 of the comparative example and the lighting fixture 1 according to the present embodiment will be described with reference to FIGS. 10A and 10B.

  FIG. 10A is a cross-sectional view showing a simulation result of a temperature distribution in lighting device 1 according to the present embodiment.

  FIG. 10B is a cross-sectional view illustrating a simulation result of a temperature distribution in the lighting fixture 8 of the comparative example.

  10A and 10B, the temperature from 30 ° C. to 130 ° C. is shown in gray scale. 10A and 10B, the closer the color is to white, the higher the temperature is, and the closer the color is to black, the lower the temperature is.

  As shown in FIGS. 10A and 10B, the temperature is highest near light sources 30 and 830 in both the present embodiment and the comparative example. However, it can be seen that the lighting fixture 1 according to the present embodiment has a lower overall temperature than the lighting fixture 8 of the comparative example. For example, as a result of the simulation, it has been found that, in the lighting fixture 1, the temperature of the hottest part of the partition 16 is lower than the temperature of the hottest part of the partition 816 of the comparative example by 10 ° C. or more. This is presumably due to the fact that in the lighting fixture 1, heat is efficiently conducted from the partition 16 to the tubular portion 11, and heat is efficiently radiated. On the other hand, in the lighting fixture 8 of the comparative example, heat is not efficiently transmitted from the partition 816 to the cylindrical portion 811 and the heat of the partition 816 is not efficiently radiated to the outside air. It is presumed that there is heat inside. In the lighting device 8 of the comparative example, the cylindrical portion 811 and the partition 816 are in contact with each other, but are separate bodies. Therefore, the thermal resistance at the contact portion between the partition 816 and the cylindrical portion 811 is large. Therefore, heat is not efficiently conducted from the partition 816 to the cylindrical portion 811. Moreover, in the lighting fixture 8 of the comparative example, by applying the heat conductive grease on the contact surface between the partition wall portion 816 and the cylindrical portion 811, the heat transfer efficiency from the partition wall portion 816 to the cylindrical portion 811 is improved. However, heat conduction efficiency is not improved as much as when the partition 816 and the cylindrical portion 811 are formed integrally. In addition, since a step of applying heat conductive grease is added in the manufacturing process of the lighting fixture, the labor, time, and cost required for manufacturing increase. Further, the heat conduction grease may leak to the outside of the lighting fixture, and the exposed surface of the lighting fixture may be stained.

  As described above, in the lighting fixture 1 according to the present embodiment, since heat can be radiated more efficiently than the lighting fixture 8 of the comparative example, a decrease in the luminous efficiency of the LED of the light source 30 can be suppressed.

[3. Lead wire position regulation configuration]
Next, a configuration for restricting the position of the lead wire 92 according to the present embodiment will be described.

  As shown in FIG. 8, at least two of the plurality of rear fin portions 17 are in the vicinity of the insertion hole 162 through which the lead wire 92 is inserted, and the insertion hole 162 is connected to the x-axis. It is erected at the position sandwiched in the direction. The position of the lead wire 92 in the x-axis direction is regulated by the rear fin-like portion 17 erected near the insertion hole 162. Therefore, the lead wire 92 can be easily arranged at a predetermined position. Further, when the lead wire 92 is inserted into the inside of the arm 70, the position of the lead wire 92 is regulated, so that the operation of inserting the lead wire 92 can be easily performed. The insertion operation will be described with reference to FIG.

  FIG. 11 is a cross-sectional perspective view showing the arrangement of components when the lead wire 92 is inserted into the insertion hole 76 of the arm 70 in the lighting fixture 1 according to the present embodiment.

  As shown in FIG. 11, when the lead wire 92 is inserted into the insertion hole 76 of the arm 70, the arm 70 is attached to the arm support 20, and the longitudinal direction of the arm 70 is in the optical axis J direction. Maintain a posture that follows. Then, the arm 70 is arranged behind the lamp body 10 (negative side in the z-axis direction), and the tip of the lead wire 92 is inserted into the insertion hole 76 of the arm 70. Subsequently, the lead wire 92 is inserted into the insertion hole 76 of the arm 70 while moving the arm 70 in the direction of the arrow in FIG. 11 (the positive direction in the z-axis direction).

  As described above, since the lead wire 92 is inserted into the insertion hole 76 of the arm 70, the lead wire 92 is pushed to the positive side in the z-axis direction by the arm 70, so that the lead wire 92 is bent in the x-axis direction in FIG. There are cases. However, in the lighting fixture 1 according to the present embodiment, since the rear fin-like portion 17 regulates the position of the lead wire 92 in the x-axis direction, the bending of the lead wire 92 is suppressed. Thus, the lead wire 92 can be easily inserted into the insertion hole 76 of the arm 70.

[4. appearance]
Next, the appearance of the lighting fixture 1 according to the present embodiment will be described.

  As shown in FIGS. 1 and 6, in the lighting fixture 1 according to the present embodiment, since the lamp body 10 in which the light source 30 is disposed has a simple shape of a substantially cylindrical shape, at least the lamp There are almost no irregularities on the side surface of the body 10. Thereby, in the lighting fixture 1, a simple appearance can be realized.

  Further, as shown in FIG. 6, in the lighting fixture 1, the connecting portion between the other end 74 of the arm 70 and the arm support 20 is disposed inside the lamp body 10, and the opening width of the side opening 113. Is substantially the same as the thickness of the arm 70. As a result, the side opening 113 is closed by the arm 70, so that the connection portion between the arm 70 and the arm support base 20, the lead wire 92, and the rear fin shape are formed from outside the lighting fixture 1 through the side opening 113. The part 17 and the like can be suppressed from being visually recognized. That is, the appearance of the lighting fixture 1 can be further simplified. Here, the thickness of the arm 70 refers to the thickness in the x-axis direction at a position corresponding to the opening of the arm body 72. The opening width of the side opening 113 refers to the width of the side opening 113 in the x-axis direction. The thickness of the arm 70 is substantially the same as the opening width of the side opening 113 when the thickness of the arm 70 is smaller than the opening width of the side opening 113 and 70% or more of the opening width. It means something.

  Further, in the lighting fixture 1, as shown in FIGS. 4 and 5, the end surface 118 of the lamp body 10 on the rear space 122 side and the envelope surface of the exposed surface 280 of the heat dissipating portion 28 have a continuous smooth concave shape. A curved surface. Here, the envelope of the exposed surface 280 is a surface formed by an envelope in a cross section of the exposed surface 280 passing through the optical axis J. In the present embodiment, the end surface 118 and the envelope surface of the exposed surface 280 of the heat radiating portion 28 form one spherical surface. Thereby, since the end face 118 and the exposed surface 280 are felt as an integral curved surface in appearance, the unevenness of the groove in the exposed surface 280 can be suppressed.

  As described above, in the lighting fixture 1 according to the present embodiment, a simple appearance can be realized by reducing the uneven structure on the exposed surface of the side surface and the rear surface (the negative surface in the z-axis direction) of the lamp body 10. .

[5. Effects etc.]
As described above, the lighting fixture 1 according to the present embodiment includes the light source 30 including the solid-state light emitting element, the lamp body 10 in which the light source 30 is disposed, and the power supply circuit for supplying power to the light source 30. And a power supply box 90. In addition, the lighting fixture 1 includes an arm 70 having one end 73 connected to the power supply box 90 and the other end 74 connected to the lamp body 10, and the arm support base 20 supporting the arm 70. The lamp body 10 has a tubular portion 11 having a tubular shape with both ends opened, and is formed integrally with the tubular portion 11, and the internal space of the tubular portion 11 is divided into a front space 121 and a rear space 122. A partition 16 is provided for partitioning. Further, the lamp body 10 includes, in the rear space 122, a rear fin-shaped portion 17 having a fin-shaped shape integrally formed with at least one of the cylindrical portion 11 and the partition wall 16. The light source 30 is attached to the attachment surface 161 which is one surface of the partition 16 in the front space 121, and the rear fin-shaped portion 17 is arranged so as not to go out of the lamp body 10 from the rear space 122. The arm support base 20 is fixed to the lamp body 10 in the rear space 122, and the arm 70 is disposed in a side opening 113 formed on the side surface of the tubular portion 11.

  Thus, in the lighting fixture 1, the rear fin-shaped portion 17 does not come out of the lamp body 10. Further, since the arm 70 is attached to the arm support base 20 in the rear space 122, an uneven structure such as a screw at a connection portion between the arm support base 20 and the arm 70 is arranged inside the lamp body 10. Thereby, the uneven structure on the exposed surface of the lighting apparatus 1 can be reduced. That is, the lighting fixture 1 can realize a simple appearance. Further, in the lighting fixture 1, since the partition 16 to which the light source 30 is attached is formed integrally with the tubular portion 11, heat generated from the light source 30 is efficiently transmitted to the tubular portion 11. Thereby, heat can be efficiently radiated from the cylindrical portion 11 to the outside air.

  In addition, in the lighting fixture 1 according to the present embodiment, a heat radiating portion 28 that is thermally connected to the lamp body 10 is provided. The heat radiating portion 28 closes the rear opening 112 on the rear space 122 side of the lamp body 10, and an exposed surface 280 which is an outward facing surface of the rear space 122 of the heat radiating portion 28 is disposed inside the rear space 122. You may.

  Thus, by providing the heat radiating portion 28 thermally connected to the lamp body 10, the heat radiation efficiency from the lamp body 10 can be further improved. In addition, the heat radiating portion 28 closes the rear opening 112 on the rear space 122 side, so that the uneven structure such as the rear fin-shaped portion 17 in the rear space 122 is suppressed from being viewed from outside the lighting fixture 1. it can. In addition, since the heat radiating portion 28 is disposed in the rear space 122, even when the exposed surface 280 of the heat radiating portion 28 has an uneven structure, the uneven structure is suppressed from being seen from outside the lighting fixture 1. can do.

  Further, in lighting device 1 according to the present embodiment, end surface 118 on rear space 122 side of lamp body 10 and the envelope surface of exposed surface 280 of heat radiating portion 28 form a continuous smooth curved surface having a concave shape. May be.

  Thereby, since the end face 118 and the exposed surface 280 are felt as an integral curved surface in appearance, the unevenness of the groove in the exposed surface 280 can be suppressed.

  Further, in lighting device 1 according to the present embodiment, the opening width of side opening 133 may be substantially the same as the thickness of arm 70.

  As a result, the side opening 113 is closed by the arm 70, so that the connection portion between the arm 70 and the arm support base 20, the lead wire 92, and the rear fin shape are formed from outside the lighting fixture 1 through the side opening 113. The part 17 and the like can be suppressed from being visually recognized. That is, the appearance of the lighting fixture 1 can be further simplified.

  In addition, in the lighting fixture 1 according to the present embodiment, a lead wire 92 for supplying power from the power supply circuit to the light source 30 is provided, and the lead wire 92 has one end and the other end electrically connected to the light source 30 and the power supply circuit, respectively. And may be inserted into an insertion hole 162 formed in the partition 16. Further, the position of the lead wire 92 may be regulated by the rear fin-shaped portion 17.

  Thereby, the position of the lead wire 92 is regulated, so that bending of the lead wire 92 is suppressed. Therefore, the lead wire 92 can be easily inserted into the insertion hole 76 of the arm 70.

  Further, in lighting device 1 according to the present embodiment, lamp body 10 has a front fin shape having a fin shape integrally formed in at least one of cylindrical portion 11 and partition portion 16 in front space 121. A unit 15 may be provided. The front fin portion 15 may be arranged so as not to go out of the lamp body 10 from the front space 121.

  Thereby, since the front fin-like portion 15 has a function of conducting and radiating heat from at least one of the partition wall portion 16 and the tubular portion 11, the heat radiation efficiency of the lighting fixture 1 can be further improved. In addition, since the front fin-like portion 15 is arranged so as not to go out of the lamp body 10 from the front space 121, the uneven structure on the exposed surface of the lighting fixture 1 can be suppressed.

  Moreover, in the lighting fixture 1 according to the present embodiment, the lamp body 10 includes the light-shielding wall portion 14 erected on the mounting surface 161 and surrounding the light source 30, and the light-shielding wall portion 14, the front fin-shaped portion 15, The partition part 16 and the cylindrical part 11 may be formed integrally.

  Thereby, in the lighting fixture 1, since heat is efficiently transmitted from the partition part 16 to the cylindrical part 11 via the light shielding wall part 14 and the front fin-like part 15, the heat radiation efficiency can be further improved. it can.

(Modifications, etc.)
As described above, the lighting fixture 1 according to the present invention has been described based on the embodiment, but the present invention is not limited to the above embodiment.

  For example, in the above-described embodiment, the rear fin-shaped portion 17 is formed integrally with both the tubular portion 11 and the partition 16, but the configuration of the rear fin-shaped portion 17 is not limited to this. The rear fin-shaped portion 17 may be formed integrally with at least one of the tubular portion 11 and the partition 16.

  Further, in the above-described embodiment, the front fin-shaped portion 15 is formed integrally with any of the cylindrical portion 11, the partition wall portion 16, and the light shielding wall portion 14. It is not limited to. The front fin portion 15 may be formed integrally with at least one of the tubular portion 11, the partition wall portion 16, and the light shielding wall portion 14.

  Further, in the above embodiment, the COB type LED is used as the light source 30, but another solid state light emitting device may be used. For example, an SMD (Surface Mount Device) type LED may be used. Further, another solid light emitting element such as an organic EL (Electro Luminescence) element may be used.

  In addition, a form obtained by applying various modifications conceivable by those skilled in the art to each embodiment, or realized by arbitrarily combining components and functions in each embodiment without departing from the spirit of the present invention. Embodiments are also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 10 Lamp body 11 Cylindrical part 14 Light shielding wall part 15 Front fin part 16 Partition part 17 Back fin part 20 Arm support base 30 Light source 28 Heat radiating part 70 Arm 73 One end 74 Other end 90 Power supply box 92 Lead Line 113 Side opening 118 End face 121 Front space 122 Back space 161 Mounting surface 162 Insertion hole 280 Exposed surface

Claims (6)

A light source including a solid state light emitting device;
A lamp body in which the light source is disposed,
A power supply box internally provided with a power supply circuit for supplying power to the light source,
An arm having one end connected to the power supply box and the other end connected to the lamp body;
An arm support for supporting the arm ,
A radiator thermally connected to the lamp body ,
The lamp body is
A cylindrical portion having a cylindrical shape with both ends opened,
A partition wall portion formed integrally with the tubular portion and partitioning an internal space of the tubular portion into a front space and a rear space,
In the rear space, a rear fin-like portion having a fin-like shape formed integrally with at least one of the cylindrical portion and the partition wall portion,
The light source is attached to an attachment surface that is one surface of the partition in the front space,
The rear fin portion is arranged so as not to go out of the lamp body from the rear space,
The arm support is fixed to the lamp body in the rear space,
The arm is disposed at a side opening formed on a side surface of the cylindrical portion ,
The radiator closes a rear opening on the rear space side of the lamp body,
A lighting fixture in which an exposed surface, which is a surface facing the outside of the rear space of the heat radiating portion, is disposed inside the rear space . An end surface of the rear space side of the lamp body, wherein the envelope surface of the exposed surface of the heat radiating portion, the lighting instrument according to claim 1 which forms a concave continuous smooth curved surface. Opening width of said lateral opening, the luminaire according to claim 1 or 2 wherein the thickness of the arm and is substantially the same. A lead wire for supplying power to the light source from the power supply circuit,
One end and the other end of the lead wire are electrically connected to the light source and the power supply circuit, respectively, are inserted into insertion holes formed in the partition, and the position is regulated by the rear fin-shaped portion. lighting device according to any one of claims 1-3. The lamp body includes a front fin-like portion having a fin-like shape integrally formed with at least one of the cylindrical portion and the partition wall portion in the front space,
The lighting device according to any one of claims 1 to 4 , wherein the front fin-shaped portion is arranged so as not to go out of the lamp body from the front space. The lamp body is provided upright on the mounting surface, and includes a light shielding wall surrounding the light source,
The lighting device according to claim 5 , wherein the light-shielding wall, the front fin-like portion, the partition, and the tubular portion are integrally formed.