JP7145681B2 - lighting equipment - Google Patents

Description

The present invention relates to a lighting fixture with a power supply unit.

Patent Literature 1 describes a lighting fixture that includes a main body in which a light source module is arranged, an arm that is rotatably attached to the main body, and a plug that is rotatably attached to the arm. The main body of Patent Document 1 includes a lamp having a light source module and a power supply unit that supplies power to the light source module. The lamp is arranged on the front side and the power supply unit is arranged on the back side. The power supply unit has a structure in which the lower surface side is covered with a semi-cylindrical cover in which the upper half of the cylinder is notched.

JP 2018-55855 A

In Patent Document 1, heat generated from the light source module is radiated using the cover as a heat radiation surface. However, the cover has a semi-cylindrical shape, so to speak, in a shape in which the upper half of the cylinder is notched, so there is a problem that the area of the heat dissipation surface is reduced by the notch, and the amount of heat dissipation is not sufficient. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lighting fixture capable of improving heat radiation performance of heat emitted from a light source module.

A lighting fixture according to the present invention includes a light source module, a power supply unit that supplies power to the light source module, a housing that accommodates the light source module and the power supply unit, an arm that is rotatably attached to the housing, and an arm is rotatably mounted on the component mounting surface of the housing, the housing includes a component mounting surface on which the light source module is mounted on the front side and the end of the arm is mounted on the back side; It has a cylindrical shape surrounding the outer peripheral surface of the surface, and has a side surface with a notch that allows rotation of the arm, and the arm bearing portion and the power supply unit are fastened together to the component mounting surface. It is.

According to the present invention, the side surface of the housing that houses the power supply unit is formed in a cylindrical shape with a cutout that allows the arm to rotate. It is configured in a cylindrical shape that does not Therefore, a large surface area for dissipating the heat of the light source module can be secured, and the heat dissipating property of the heat emitted from the light source module can be improved.

1 is a perspective view of lighting fixture 100 according to Embodiment 1 of the present invention. FIG. 1 is an exploded perspective view of lighting fixture 100 according to Embodiment 1 of the present invention. FIG. 1 is a schematic vertical cross-sectional view of a lighting fixture 100 according to Embodiment 1 of the present invention; FIG. 4 is an enlarged view of a portion surrounded by a dotted line in FIG. 3; FIG. FIG. 3 is a front view of a component mounting front surface 11-1a of the lighting fixture 100 according to Embodiment 1 of the present invention. FIG. 3 is a schematic cross-sectional view of a main part for explaining a holding structure of the condenser lens 15 in the lighting fixture 100 according to Embodiment 1 of the present invention; It is the figure which looked at the housing|casing 11 of the lighting fixture 100 which concerns on Embodiment 1 of this invention from the back side. It is the figure which looked at the state which removed the power supply unit 17 from the lighting fixture 100 which concerns on Embodiment 1 of this invention from the back side. It is the figure which looked at the lighting fixture 100 which concerns on Embodiment 1 of this invention from the back side.

Embodiment 1.
FIG. 1 is a perspective view of lighting fixture 100 according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view of lighting fixture 100 according to Embodiment 1 of the present invention. FIG. 3 is a schematic longitudinal sectional view of lighting fixture 100 according to Embodiment 1 of the present invention. FIG. 4 is an enlarged view of the portion enclosed by the dotted line in FIG. In the first embodiment, the side from which light is emitted is the front side, and the opposite side is the rear side. Further, in Embodiment 1, "upper", "lower", "right", "left", "front", and "rear" are based on the installation posture of lighting device 100 in FIG. .

The luminaire 100 includes a main body 10 , an arm 20 rotatably attached to the main body 10 at one end, and a plug 30 rotatably attached to the other end of the arm 20 . The luminaire 100 is used with the plug 30 attached to a duct rail (not shown), which is a part to be attached. The luminaire 100 is a so-called spotlight that emits narrow-angle illumination light, but is not limited to a spotlight.

As shown in FIGS. 1 to 4, the main body 10 includes a housing 11, a light source module 12 housed on the front side of the housing 11, an insulating sheet 14, and light emitted from the light source module 12. A condensing lens 15 for condensing or diffusing light and a lens holder 16 for holding the condensing lens 15 are provided. The main body 10 further includes a power supply unit 17 that is housed on the rear side of the housing 11 and that supplies power to the light source module 12 .

The housing 11 has a disk-shaped component mounting surface 11-1 and a cylindrical side surface that surrounds the outer peripheral surface of the component mounting surface 11-1 and has a tapered side surface whose diameter decreases from the front side to the rear side. 11-2. The side surface 11-2 includes a surface 11-1a on the front side of the component mounting surface 11-1 (hereinafter referred to as the component mounting front surface) and a surface 11-1a on the rear side of the component mounting surface 11-1 (hereinafter referred to as the component mounting back surface) 11- 1b are formed by extending to the front side and the back side. The side surface 11-2 is formed by injection molding an aluminum alloy. The axial direction of the side surface 11-2 coincides with the optical axis C direction of the lighting device 100. FIG.

Since the side surfaces 11-2 extend from the component mounting front surface 11-1a and the component mounting rear surface 11-1b, the heat radiation area of the housing 11 is increased and the heat radiation is high. A notch 11-2a extending in the direction of the optical axis C is formed on the side surface 11-2 on the back side of the component mounting surface 11-1. The notch 11-2a extends from the rear end of the side surface 11-2 to the center in the optical axis C direction. The notch 11-2a allows the arm 20 to rotate. The notch 11-2a also functions as a discharge path for the air inside the housing 11 that has been heated by the heat generated by the light source module 12. As shown in FIG.

The light source module 12 is fixed to the component mounting front surface 11-1a via the insulating sheet 14. As shown in FIG. The light source module 12 includes a light emitting module 12-2, a socket front portion 12-1 that holds the light emitting module 12-2 from the front side, and a socket rear portion 12-3 that holds the light emitting module 12-2 from the rear side. have. The light emitting module 12-2 includes a COB (Chip on Board)-LED which is a light emitting element. The light emitting module 12-2 may have multiple LEDs instead of the COB-LEDs.

In front of the light source module 12 , a condensing lens 15 is arranged inside the housing 11 while being sandwiched by a pair of left and right lens holders 16 . The structure for holding the condenser lens 15 will be described below with reference to FIGS. 5 and 6. FIG.

FIG. 5 is a front view of the component mounting front surface 11-1a of the lighting fixture 100 according to Embodiment 1 of the present invention. FIG. 6 is a schematic cross-sectional view of a main part explaining a holding structure of the condenser lens 15 in the lighting fixture 100 according to Embodiment 1 of the present invention.
As shown in FIG. 6, the lens holder 16 that holds the condenser lens 15 has a convex portion 16-1 formed on the rear surface thereof. A boss 11-3a is formed on a component mounting front surface 11-1a facing the rear surface of the lens holder 16, and the convex portion 16-1 is fitted to the boss 11-3a to allow the lens holder 16 to mount the component. It is held on the front face 11-1a. Further, as shown in FIG. 5, ribs 11-4a are formed on the component mounting front surface 11-1a so as to protrude toward the front side. It supports holder 16 . The boss 11-3a and the rib 11-4a also function as a spacer that secures a space for arranging the light source module 12 between the lens holder 16 and the component mounting front surface 11-1a. In this manner, the lens holder 16 is configured to contact the component mounting front surface 11-1a with the bosses 11-3a and the ribs 11-4a, thereby suppressing an increase in contact area with the component mounting surface 11-1.

In the above configuration, heat generated by the light source module 12 is transmitted to the housing 11 through the insulating sheet 14 . That is, the heat generated by the light source module 12 is first transmitted to the component mounting surface 11-1 through the insulating sheet 14, and further transmitted from the component mounting surface 11-1 to the side surface 11-2. Then, the heat is dissipated into the air from the side surface 11-2. Since the side surface 11-2 functions as a heat radiation surface in this way, compared to the configuration in which the side surface 11-2 is, for example, semi-cylindrical, the cylindrical shape of the side surface 11-2 in the first embodiment provides high heat radiation. It is possible to dissipate heat efficiently.

A notch 11-2a is formed in the side surface 11-2, and the notch 11-2a is positioned on the upper side when the main body 10 is in a horizontal posture. Therefore, the heat of the light source module 12 can be dissipated from the inside of the housing 11 to the outside through the notch 11-2a by natural convection.

Now, let us return to the description of FIGS. 1 to 4. FIG.
As described above, the power supply unit 17 is accommodated in the space behind the component mounting surface 11-1 in the housing 11. As shown in FIG. The power supply unit 17 has a configuration in which a power supply board (not shown) is provided in a unit housing 17a. The power supply unit 17 is accommodated in the housing 11 while being covered with a sheet metal case 18 as shown in FIGS. By covering the power supply unit 17 with the case 18, the charging portion of the power supply unit 17 can be enclosed and the occurrence of tracking and the like can be suppressed. Moreover, the heat dissipation of the power supply unit 17 can be improved through the case 18 . Note that the case 18 may be made of a material other than sheet metal, such as resin.

As shown in FIGS. 2 and 4, the unit housing 17a and the case 18 of the power supply unit 17 are open on the side facing the component mounting back surface 11-1b. That is, since it is covered with the unit housing 17a and the component mounting back surface 11-1b, the openings 17b and 18a are formed on the sides of the unit housing 17a and the case 18 facing the component mounting back surface 11-1b. Thereby, the material cost and processing cost of the unit housing 17a and the case 18 can be reduced.

Here, the first embodiment employs a structure in which the power supply unit 17 is accommodated inside the housing 11 and is configured to suppress the heat generated from the light source module 12 from being transmitted to the power supply unit 17 . A specific structure will be described below with reference to FIG.

As shown in FIG. 4, the power supply unit 17 is arranged in the housing 11 at a position separated from the component mounting back surface 11-1b in the direction of the optical axis C of the lighting device 100 by a gap distance G1. The gap distance G1 may be appropriately set in consideration of the weight balance of the main body 10, which will be described below. By arranging the power supply unit 17 apart from the component mounting back surface 11-1b in this way, it is possible to suppress the heat emitted from the light source module 12 and transmitted to the component mounting surface 11-1 from being transmitted to the power supply unit 17. FIG.

A gap G2 is provided between the power supply unit 17 and the side surface 11-2 of the housing 11. As shown in FIG. A gap G3 is provided between the back surface of the power supply unit 17 and the case 18 . By arranging the power supply unit 17 between the side surface 11-2 of the housing 11 and the case 18 with the gap G2 and the gap G3 in between, the gap becomes a heat insulating space, and the light source module 12 is separated from the housing. The heat transmitted to 11 can be suppressed from being transmitted to the power supply unit 17.例文帳に追加In addition, the space defined by the gap G2 and the gap G3 also functions as a space for dissipating heat generated from the main body of the power supply unit 17 and contributes to promotion of heat dissipation of the power supply unit 17 . In addition, since the rear side of the side surface 11-2 of the housing 11 is not closed and is open, the heat generated from the main body of the power supply unit 17 is efficiently dissipated into the air from the rear side of the housing 11. be done.

Further, by providing the gap G2 and the gap G3, it is possible to widen the degree of freedom in routing the wiring from the light source module 12 to the power supply unit 17 and the connection position of the wiring.

As a structure for suppressing heat transfer to the power supply unit 17, the thickness of the component mounting surface 11-1 is configured to be approximately the same as the thickness of the socket front surface 12-1. As a result, the thermal resistance of the component mounting surface 11-1 can be reduced compared to the case where the component mounting surface 11-1 is made thinner than the socket front surface portion 12-1. Therefore, the heat transfer from the light source module 12 to the component mounting surface 11-1 can be promoted, and as a result, the heat of the light source module 12 can be efficiently diffused into the housing 11 to be dissipated.

Then, as shown in FIG. 4, the thickness of the side surface 11-2 on the back side from the component mounting surface 11-1 becomes thicker as it approaches the component mounting back surface 11-1b from the back side in the optical axis C direction. As a result, the thermal resistance of the rear side of the side surface 11-2 from the component mounting surface 11-1 becomes smaller as it approaches the component mounting surface 11-1. Therefore, heat transfer from the component mounting surface 11-1 to the side surface 11-2 can be promoted. Also, from a different point of view, the thickness of the side surface 11-2 of the housing 11 on the rear side from the component mounting surface 11-1 becomes thinner as it moves away from the component mounting surface 11-1 in the optical axis C direction. Such a shape increases the contact area of the side surface 11-2 with the air, thereby improving the heat dissipation from the side surface 11-2.

Next, a fixing structure between the arm 20 and the housing 11 will be described.
FIG. 7 is a diagram of the housing 11 of the lighting device 100 according to Embodiment 1 of the present invention as viewed from the rear side. FIG. 8 is a rear view of the lighting fixture 100 according to Embodiment 1 of the present invention with the power supply unit 17 removed.

The arm 20 is a member that rotatably supports the main body 10 with an arm shaft 21 . Arm 20 has a hole through which arm shaft 21 passes at the end opposite to the side connected to plug 30 . The arm shaft 21 is passed through this hole, and both ends of the arm shaft 21 are supported by the arm bearing portions 22 as shown in FIG.

The arm bearing portion 22 holds the arm 20 via the arm shaft 21, and is firmly attached to the component mounting back surface 11-1b. In Embodiment 1, the arm bearing portion 22 is firmly attached to the component attachment back surface 11-1b by screwing at four locations, as will be described in detail below. The arm bearing portion 22 is composed of a pair of left and right L-shaped members each having a bearing surface 22a formed with a shaft hole through which the arm shaft 21 is passed and a mounting surface 22b extending perpendicularly from the bearing surface 22a. is formed with two upper and lower through-holes for screwing.

The mounting surface 22b is screwed to the component mounting back surface 11-1b at two locations far from the plane P including the optical axis C as shown in FIG. 8 among the four screwing locations. Specifically, the screw 40 is passed through the through hole of the mounting surface 22b and fastened to the screw hole 11-6 (see FIG. 7) formed in the component mounting back surface 11-1b. Since the arm 20 is thus fixed to the component mounting back surface 11-1b via the arm shaft 21 and the arm bearing portion 22, the main body portion 10 is rotatable by the arm shaft 21. As shown in FIG. Specifically, the main body 10 can be rotated from a horizontal posture in which the optical axis C is horizontal to a vertical posture in which the optical axis C is vertical, and the direction of light irradiation can be changed in the vertical direction. It is possible. Of the four screwing locations, two locations near the plane P including the optical axis C are used for fastening the arm bearing portion 22 and the power supply unit 17 together, as will be described later.

Next, the connection between the power supply unit 17 and the plug 30 will be described with reference to FIGS. 3 and 4. FIG.
The power supply unit 17 is electrically connected to the plug 30 by a harness 31 . The harness 31 is extended from the plug 30 along the arm 20 as shown in FIG. It is passed from the front side to the back side. The harness 31 is pulled into the power supply unit 17 through the opening 18a of the case 18 and the opening 17b of the power supply unit 17 and electrically connected to a power supply board (not shown).

As described above, the harness 31 is supported by the wire support portion 23 of the arm 20, and when the position of the arm 20 changes, the harness 31 also moves along with the positional movement. The harness 31 moves in the space defined by the gap distance G1 between the power supply unit 17 and the component mounting back surface 11-1b as a moving space. The wire supporting portion 23 that supports the harness 31 and the opening 17b of the power supply unit 17 are both arranged in the same area in the direction of the optical axis C, specifically in the center of the direction of the optical axis C within the side surface 11-2. . Therefore, the harness 31 can be arranged at the shortest distance from the wire support portion 23 to the power supply unit 17, and the length of the harness 31 can be shortened.

Next, a structure for fixing the power supply unit 17 inside the housing 11 will be described with reference to FIGS. 7 to 9. FIG.

FIG. 9 is a diagram of the lighting fixture 100 according to Embodiment 1 of the present invention as seen from the rear side.
A hollow boss 11-3b protruding toward the back side is formed on the component mounting back surface 11-1b to which the power supply unit 17 is fixed. A projection (not shown) formed on the front side of the power supply unit 17 is fitted into the boss 11-3b, thereby fixing the power supply unit 17 to the component mounting back surface 11-1b. A rib 11-4b protruding toward the rear side is formed on the component mounting rear surface 11-1b, and the tip surface of the rib 11-4a contacts the front surface of the power supply unit 17 to support the power supply unit 17. there is

In addition, a partition plate 11-5 protruding toward the back side is formed on the component mounting back surface 11-1b so as to extend in the left-right direction. The partition plate 11-5 divides the space on the rear side of the component mounting rear surface 11-1b into an upper space for housing the arm 20 and a lower space for housing the power supply unit 17. As shown in FIG. On the back side of the partition plate 11-5, as shown in FIG. 4, a space is secured between the openings 17b and 18a on the front sides of the power supply unit 17 and the case 18, through which the harness 31 passes.

A pair of right and left power supply unit mounting portions 17-1 projecting toward the arm 20 in a rear view are formed on the front surface of the case 18 that houses the power supply unit 17, as shown in FIG. The power supply unit mounting portion 17-1 abuts on the mounting surface 22b of the arm bearing portion 22 from the rear side. A through hole penetrating in the front-rear direction is formed in the power supply unit mounting portion 17-1. A screw 41 is passed through this through-hole and two through-holes near the plane P including the optical axis C among the four through-holes formed in the mounting surface 22b of the arm bearing portion 22. 1b, the case 18 is fixed together with the arm bearing portion 22 to the component mounting back surface 11-1b. In this manner, the power supply unit 17 and the arm bearing portion 22 are fastened together to the component mounting back surface 11-1b at the case 18 portion, so that the number of screws used for fastening can be reduced.

Here, the power supply unit mounting portion 17-1 protrudes from the opening 17b of the power supply unit 17 to the front side by a gap distance G1. In this manner, the power supply unit mounting portion 17-1 protrudes forward by the gap distance G1, so that the power supply unit 17 is mounted apart from the component mounting back surface 11-1b by the gap distance G1 as described above.

Next, the weight balance of the body portion 10 will be described.
Since the weight of the main body 10 is applied to the arm shaft 21, if the weight of the main body 10 is not balanced in the direction of the optical axis C with the arm shaft 21 as a reference, the main body 10 will move to the arm shaft 21 after the lighting apparatus 100 is installed. can rotate around That is, there is a possibility that the posture of the main body 10 is changed unintentionally, and the light irradiation area moves from the original irradiation position. Therefore, in order to suppress such an unintended change in posture of the main body 10, it is preferable that the center of gravity of the main body 10 is aligned with or brought close to the arm axis 21. As shown in FIG.

Here, as shown in FIG. 3, the arm shaft 21 is arranged substantially in the center of the housing 11 in the direction of the optical axis C in a side view. In order to position the arm shaft 21 substantially in the center of the optical axis C direction, the component mounting surface 11-1 is arranged closer to the light source module 12 side than the center of the housing 11 in the optical axis C direction.

Since the arm bearing portion 22 is arranged substantially in the center of the housing 11 in the direction of the optical axis C in this way, when the body portion 10 is rotated around the arm shaft 21 to change the light irradiation area, In addition, the amount of movement of the irradiation area relative to the amount of rotation can be reduced. For example, when the arm bearing portion 22 is arranged at the end of the housing 11 on the back side, the light source module 12 arranged on the front side in the housing 11 and the arm shaft 21 are separated from each other in the direction of the optical axis C. Therefore, the amount of movement of the irradiation area with respect to the amount of rotation of the main body 10 is increased. That is, when the user grips and rotates the body portion 10 to change the irradiation region, the irradiation region moves more than the user expects with respect to the amount of rotation of the body portion 10 . In contrast, in Embodiment 1, the arm bearing portion 22 is arranged substantially in the center in the direction of the optical axis C, so that the amount of rotation of the body portion 10 and the amount of movement of the irradiation area accompanying the rotation of the body portion 10 and can be approached sensuously.

In order to bring the center of gravity of the main body 10 closer to the arm shaft 21, the arrangement position of the power supply unit 17, which is one of the heavy components arranged in the main body 10, should be considered. Specifically, in the design stage, the position of the power supply unit 17 in the optical axis C direction may be adjusted based on the weight of the power supply unit 17 to adjust the weight balance of the main body 10 . In the case of the first embodiment, the center of gravity of the main body 10 is located slightly behind the arm shaft 21 when viewed from the side. Specifically, the weight balance ratio between the light source module 12 side and the power supply unit 17 side in a side view with the arm axis 21 as the center (a:b weight balance ratio in FIG. 3) is approximately 4.5:5. 0.5.

Further, by arranging the power supply unit 17 closer to the arm shaft 21 in the vertical direction, the center of gravity of the main body 10 is brought closer to the arm shaft 21, and deterioration of the weight balance of the lighting fixture 100 due to the movement of the arm 20 is suppressed. . This configuration will be described below with reference to FIG.
As described above, the partition plate 11-5 is formed on the component attachment back surface 11-1b, and the partition plate 11-5 is located in the space inside the housing 11 on the back side of the component attachment back surface 11-1b. A space below the height position is a space for arranging the power supply unit 17 . If the partition plate 11-5 is formed at the height of the optical axis C, the power supply unit 17 is arranged below the optical axis C. As shown in FIG. However, in Embodiment 1, the partition plate 11-5 is formed above the optical axis C, that is, at a position closer to the arm axis 21. It can be arranged closer to the arm shaft 21 side than the position.

By moving the power supply unit 17 closer to the arm shaft 21 in this way, the center of gravity of the main body 10 is brought closer to the arm shaft 21 , and deterioration of the weight balance of the lighting fixture 100 caused by the movement of the arm 20 can be suppressed.

As described above, according to the first embodiment, the side surface 11-2 of the housing 11 that houses the power supply unit 17 is formed in a cylindrical shape, and the side surface 11-2 allows the arm 20 to rotate. A notch 11-2a is formed. In other words, the side surface 11-2 of the housing 11 has a cylindrical shape with only necessary portions cut out. Therefore, compared to the conventional lighting fixture described in Patent Document 1, in which the case housing the power supply unit 17 has a semi-cylindrical shape, a wider surface area can be secured for dissipating the heat of the light source module 12. The heat dissipation effect can be enhanced.

In addition, since the notch 11-2a is positioned on the upper side with the side 11-2 of the housing 11 in a horizontal posture, the heat inside the side 11-2 passes through the notch 11-2a by natural convection. Heat can be radiated from the inside of the housing 11 to the outside.

The notch 11-2a is formed by extending from the rear end of the side surface 11-2 of the housing 11 in the direction of the optical axis C to the central portion. As a result, the attachment position of the arm 20 to the housing 11 can be set at the center of the side surface 11-2 of the housing 11 in the optical axis C direction.

Further, since the arm bearing portion 22 and the power supply unit 17 are fastened together to the component mounting surface 11-1, the number of screws used for fastening can be reduced.

10 main body, 11 housing, 11-1 component mounting surface, 11-1a component mounting front surface, 11-1b component mounting rear surface, 11-2 side surface, 11-2a notch, 11-3a boss, 11-3b boss, 11-4a rib, 11-4b rib, 11-5 partition plate, 11-6 screw hole, 12 light source module, 12-1 socket front part, 12-2 light emitting module, 12-3 socket back part, 14 insulating sheet, 15 condenser lens, 16 lens holder, 16-1 convex portion, 17 power supply unit, 17-1 power supply unit mounting portion, 17a unit housing, 17b opening, 18 case, 18a opening, 20 arm, 21 arm shaft, 22 arm Bearing portion 22a Bearing surface 22b Mounting surface 23 Wire support portion 23-1 Hole 30 Plug 31 Harness 40 Screw 41 Screw 100 Lighting fixture C Optical axis G1 Gap distance G2 Gap G3 Gap , the P plane.

Claims (3)

a light source module;
a power supply unit that supplies power to the light source module;
a housing that accommodates the light source module and the power supply unit therein;
an arm rotatably attached to the housing ;
an arm bearing portion for rotatably attaching the arm to the component mounting surface of the housing;
The housing has a cylindrical shape surrounding the component mounting surface on which the light source module is mounted on the front side and the end portion of the arm is mounted on the back side, and the outer peripheral surface of the component mounting surface. and a side surface formed with a notch that allows rotation ,
A lighting fixture in which the arm bearing portion and the power supply unit are fastened together to the component mounting surface . 2. The luminaire according to claim 1, wherein the notch is formed at a position on the upper side of the side surface of the housing in a horizontal posture in which the axial direction of the side surface faces the horizontal direction. 3. The lighting fixture according to claim 1, wherein the notch is formed in the side surface of the housing so as to extend from an end portion on the back side of the housing in the axial direction to a central portion.

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