JP7382734B2 - lighting equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture that is attached to an attached part such as a ceiling.

2. Description of the Related Art Conventionally, lighting equipment is known to have a configuration including a heat sink that radiates heat generated from a light source unit that emits light. For example, the lighting device disclosed in Patent Document 1 includes a power supply case, an LED, a power supply board, a light-transmitting cover, and an arm. The power supply case has a storage part that stores the power supply board, and a mounting part on which the LED is mounted on the lower surface side. A plurality of fins are provided on the upper surface of the mounting portion so as to protrude upward as a heat sink.

JP 2018-14232 Publication

Since the lighting device disclosed in Patent Document 1 does not have a member that covers the upper surface of the fin, there is a risk that dust may accumulate between the fins and the heat dissipation function may deteriorate after long-term use. In order to prevent dust from accumulating between the fins, it is conceivable to provide an eave that covers the upper surfaces of the fins. However, in this case, it is necessary to provide a holding member such as a pillar member for holding the eaves separately from the heat sink, which increases the number of parts and processing effort, and complicates the assembly work of the device. Note that although the power supply case is provided with an eaves portion in Patent Document 1, it is not configured to cover the upper surface of the fins, and therefore dust accumulates between the fins after long-term use.

The present invention was made in order to solve the above-mentioned problems, and an object of the present invention is to provide a lighting fixture that can be easily assembled.

A lighting fixture according to the present invention includes a light source member that emits light, a heat sink to which the light source member is attached, and a power supply unit that supplies power to the light source member, wherein the heat sink is , a base portion to which the light source member is attached; a fin having a lower end surface connected to the base portion and rising upward from the base portion; and an eaves portion connected to the upper end surface of the fin and covering the upper surface of the fin. and an engaging part for sliding and detachably attaching the power supply unit, and the power supply unit is provided with a power supply leg part that slides and engages with the engaging part. The fin has a cylindrical portion provided at the center and a plurality of plate portions protruding radially from an outer periphery of the cylindrical portion, and at least some of the plate portions have a lower end surface that is closer to the base portion. At least some of the plate portions have upper end surfaces joined and connected to the eaves portion.

According to the lighting device of the present invention, the structure is simple in that the eave portion is simply connected to the upper end surface of the fin, and there is no need to provide a special component for attaching the eave portion, so the assembly work of the device is simplified. It can be done easily.

1 is a perspective view showing a lighting fixture according to Embodiment 1. FIG. 1 is an exploded perspective view of the lighting fixture according to Embodiment 1, viewed from above. FIG. 1 is an exploded perspective view of the lighting fixture according to Embodiment 1, viewed from below. FIG. 1 is a perspective view showing a power supply unit and a heat sink of the lighting fixture according to Embodiment 1. FIG. FIG. 2 is a front view of the lighting fixture according to Embodiment 1, showing a power supply unit and a heat sink. FIG. 3 is a perspective view showing a lighting fixture according to a second embodiment. FIG. 3 is an exploded perspective view showing a lighting fixture according to a second embodiment. FIG. 3 is an exploded perspective view showing a heat sink of a lighting fixture according to a second embodiment. FIG. 7 is a plan view of a fin that constitutes a heat sink of a lighting fixture according to a second embodiment.

Embodiments of the present invention will be described below with reference to the drawings. In each figure, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will be omitted or simplified as appropriate. Furthermore, the shape, size, arrangement, etc. of the configurations shown in each figure can be changed as appropriate within the scope of the present invention.

Embodiment 1.
FIG. 1 is a perspective view showing a lighting fixture according to Embodiment 1. FIG. 2 is an exploded perspective view of the lighting fixture according to the first embodiment, viewed from above. FIG. 3 is an exploded perspective view of the lighting fixture according to the first embodiment, viewed from below. FIG. 4 is a perspective view of the lighting fixture according to Embodiment 1, showing a power supply unit and a heat sink. FIG. 5 is a front view of the lighting fixture according to the first embodiment, showing a power supply unit and a heat sink.

As shown in FIGS. 1 to 3, the lighting fixture 100 according to the first embodiment includes a support section 1 that is attached to an attached part such as a ceiling, and a light source unit 5 that is held by the support section 1. ing. The support portion 1 includes an arm member 2 that is attached to the attached portion, a holding member 3 that connects the arm member 2 to the light source unit 5, and a fall prevention member 4 for the lighting fixture 100. The light source unit 5 includes a light source member 6 that emits light, a rectangular parallelepiped heat sink 7, a power supply unit 8 that supplies power to the light source member 6, and a cover member 9 that covers the light source member 6.

The arm member 2, as shown in FIGS. 1 to 3, is a mounting member for mounting the lighting fixture 100 to a portion to be mounted such as a ceiling. The arm member 2 has an inverted U shape. At both ends of the arm member 2, a shaft hole 20 and an arcuate hole 21 are formed vertically side by side. The arm member 2 is rotatably attached to the side surface of the heat sink 7 at both ends by a bolt 22 passed through the shaft hole 20 through the holding member 3 and a bolt 23 passed through the arcuate hole 21 .

The holding member 3 is provided to rotatably attach the arm member 2 to the heat sink 7, as shown in FIGS. 1 to 3. The holding member 3 includes a rectangular flat plate part 30 that abuts the side surface of the heat sink 7 , an upper mounting part 31 that protrudes from the upper end of the flat plate part 30 and comes into contact with the upper surface of the heat sink 7 , and a lower end part of the flat plate part 30 that protrudes from the lower end of the flat plate part 30 . The heat sink 7 has a lower mounting portion 32 that comes into contact with the lower surface of the heat sink 7. The flat plate portion 30 is formed with a through hole 34 through which the shaft of the bolt 22 passes, and a through hole 35 through which the shaft of the bolt 23 passes. Furthermore, nuts 33 for tightening the bolts 22 and 23 are attached to the inner surface of the flat plate portion 30. The upper mounting portion 31 is formed with a through hole through which a connecting member such as a screw is passed. The upper mounting portion 31 is fixed to the upper surface of the heat sink 7 by a connecting member. Further, the lower mounting portion 32 is formed with a through hole through which a connecting member such as a screw is passed. The lower mounting portion 32 is fixed to the lower surface of the heat sink 7 by a connecting member. Note that the lower mounting portion 32 also has the function of holding the cover member 9 so that it does not fall by sandwiching the flange portion 90 of the cover member 9 with the lower surface of the heat sink 7.

The fall prevention member 4 is provided to prevent the lighting fixture 100 from falling, as shown in FIGS. 1 to 3. The fall prevention member 4 includes a wire 40, a first attachment part 41 provided at one end of the wire 40 and fixed to the attached part, and a second attachment part 41 provided at the other end of the wire 40 and attached to the heat sink 7. 42.

The light source member 6 has a structure in which a plurality of light emitting elements 61 are mounted on a substrate 60, as shown in FIGS. 2 and 3. The light source member 6 is attached to the lower surface of the heat sink 7 by adhesive or the like, and receives power from the power supply unit 8 to cause the light emitting element 61 to emit light.

The heat sink 7 radiates heat generated by the light source member 6, as shown in FIGS. 1 to 5. The heat sink 7 includes a base portion 70 to which the light source member 6 is attached, a fin 72 whose lower end surface is connected to the base portion 70 and which rises upward from the base portion 70, and a fin 72 which is connected to the upper end surface of the fin 72 and whose lower end surface is connected to the base portion 70. It has an eave part 71 that covers the upper surface. The base portion 70 forms the lower surface of the heat sink 7. The eaves portion 71 forms the upper surface of the heat sink 7. The heat sink 7 is made of a material with good heat dissipation, such as aluminum, and is formed into a substantially rectangular parallelepiped shape by extrusion molding.

The fin 72 has a lower end surface integrally connected to the base part 70, and has a plurality of plate parts 72a rising upward from the base part 70, which are arranged in parallel at regular intervals. The upper end surface of the plate portion 72a is integrally connected to the eaves portion 71. Although the plate portion 72a is provided perpendicularly to the base portion 70 and the eaves portion 71, the plate portion 72a is not limited to the perpendicular angle, and may be at an angle that intersects the base portion 70 and the eaves portion 71. Although not shown, the fin 72 may have a configuration in which only the upper end surface of a portion of the plate portion 72a is integrally connected to the eaves portion 71.

Among the plurality of plate parts 72a, the plate parts 72a at both ends forming the side surfaces of the heat sink 7 are formed with through holes 7a to prevent interference between the nuts 33 of the holding member 3 and the bolts 22 and 23. Note that the through hole 7a may be a screw hole into which the shaft portions of the bolts 22 and 23 are screwed. In this case, the nut 33 can be omitted. Further, the plate portion 72a may have a structure in which only the portion where the screw hole is formed is thick. Incidentally, the means for preventing interference between the plate portion 72a, the nut 33, the bolt 22, and the bolt 23 is not limited to the through hole 7a, and may be, for example, a groove shape into which the nut 33, the bolt 22, and the bolt 23 are fitted. Unlike the case of forming the through hole 7a, the groove shape can be formed together with extrusion molding when molding the heat sink 7. Therefore, the number of steps required for processing the heat sink 7 can be reduced, and manufacturing costs can be suppressed.

As described above, in the heat sink 7, the fins 72, the base portion 70, and the eaves portion 71 are integrally connected, so that the heat generated by the light source member 6 transferred from the base portion 70 is transferred from the fins 72 to the eaves portion. The heat can be transferred to the fins 71 and radiated by the fins 72 and the eaves part 71. Therefore, the heat sink 7 according to the first embodiment can be made lighter by reducing the number of plate portions 72a that constitute the fins 72, for example, and can have a large heat transfer area and improve heat dissipation efficiency.

A recess 71a is formed in the central portion of the eaves portion 71 and extends from one end edge to the other end edge. The recess 71a is provided with an engaging portion 73 to which the power supply unit 8 is detachably attached. The engaging portion 73 is a pair of L-shaped claw portions 73a bent outward, and is formed in a rail shape along the longitudinal direction of the recess 71a. Further, as shown in FIG. 4, a notch-shaped holding portion 71b into which a power supply wire 84 for connecting the light source member 6 and the power supply unit 8 and supplying power to the light source member 6 is fitted is formed on one end edge side of the recess 71a. is formed.

The power supply unit 8 supplies power to the light source member 6. As shown in FIGS. 1 to 5, the power supply unit 8 includes a cylindrical rectangular parallelepiped power supply case 80, a lighting circuit section (not shown) provided inside the power supply case 80, and a power supply case 80 at both ends of the power supply case 80. It has an end plate 81 that closes the opening. A power supply leg portion 83 that engages with an engagement portion 73 formed on the heat sink 7 is provided on the lower surface of the power supply case 80 . The power supply legs 83 are a pair of L-shaped claws 83a bent inward, and are formed in a rail shape along the longitudinal direction of the power supply case 80. Further, the end plate 81 is formed of, for example, a sheet metal, and is attached to the power supply case 80 with a packing interposed therebetween. Moreover, an opening is formed in one of the two end plates 81 for passing a power wire 84 connected to the lighting circuit section into the inside of the power supply case 80, and a power supply is provided in the opening. A socket 82 is provided to hold an electric wire 84.

The power supply unit 8 can be attached to the heat sink 7 by inserting the power supply leg part 83 into the engaging part 73 from one end side of the recessed part 71a of the eaves part 71 and sliding it toward the other end side. In order to prevent the power supply unit 8 from shifting in the sliding direction, the power supply case 80 is fixed to the heat sink 7 with a joining member 85 such as a screw. In the lighting fixture 100, by attaching the power supply unit 8 so as to be integrated with the heat sink 7, heat generated by the power supply unit 8 can be transferred to the heat sink 7, so that a rise in temperature of the power supply unit 8 can be suppressed. . Note that the orientation of the engaging portion 73 and the orientation of the claw portion 83a of the power supply leg portion 83 may be reversed. Further, the claw portion 73a of the engaging portion 73 and the claw portion 83a of the power source leg portion 83 are not limited to a structure in which they are slid into engagement, but may be structured in such a manner that they are pushed into engagement using elastic deformation.

The cover member 9 has a box shape with an opening on the side facing the light source member 6, and covers and protects the light source member 6 attached to the base portion 70 of the heat sink 7. The cover member 9 is made of, for example, a transparent material. The cover member 9 is provided with a flange portion 90 that projects outward along the opening edge. A plurality of through holes 90a are formed in the flange portion 90, through which shaft portions of joint members 91 such as screws pass. The cover member 9 is attached to the heat sink 7 by bringing the flange portion 90 into contact with the base portion 70 of the heat sink 7 and using a joining member 91 passed through the through hole 90a.

Note that although not shown in the drawings, the cover member 9 may have a structure in which a lens unit or a reflector is provided inside. When a lens unit is provided inside the cover member 9, the cover member 9 may be fixed to the heat sink 7 after the light source member 6 is integrated with the lens unit. Thereby, positional deviation between the light emitting element 61 and the lens unit can be suppressed, and assembly work can be performed easily.

As described above, the lighting fixture 100 according to the first embodiment includes the light source member 6 that emits light and the heat sink 7 to which the light source member 6 is attached. The heat sink 7 includes a base portion 70 to which the light source member 6 is attached, a fin 72 whose lower end surface is connected to the base portion 70 and which rises upward from the base portion 70, and a fin 72 which is connected to the upper end surface of the fin 72 and whose lower end surface is connected to the base portion 70. It has an eave part 71 that covers the upper surface. Therefore, since the lighting fixture 100 covers the upper surface of the fin 72 with the eaves portion 71, it is possible to prevent dust from accumulating on the fin 72. Furthermore, the structure is simple in that the eaves section 71 is simply connected to the upper end surface of the fins 72, and there is no need to provide any special component for attaching the eaves section 71, so that the assembly work of the instrument can be easily performed. I can do it.

The fin 72 has a lower end surface integrally connected to the base part 70, and has a configuration in which a plurality of plate parts 72a rising from the base part 70 are arranged in parallel at intervals. At least some of the plate portions 72a have upper end surfaces integrally connected to the eaves portion 71. Therefore, in the lighting fixture 100, the heat sink 7 having the eaves part 71 can be integrally manufactured as, for example, an extrusion molded product, so that the components can be simplified and the assembly work can be easily performed. Further, since there is no need to bend or drill holes in the fins 72 in order to attach the eaves portions 71, the processing does not require much time and effort, and manufacturing costs can be suppressed.

Further, in the heat sink 7, since the fins 72, the base portion 70, and the eaves portion 71 are integrally connected, the heat generated by the light source member 6 transferred from the base portion 70 is transferred from the fins 72 to the eaves portion 71. The heat can be transferred and radiated by the fins 72 and the eaves part 71. Therefore, in the lighting fixture 100, the number of plate portions 72a constituting the fins 72 can be reduced to reduce the weight of the heat sink 7, and the heat transfer area can be increased to improve heat radiation efficiency.

Furthermore, the lighting fixture 100 according to the first embodiment includes a power supply unit 8 that supplies power to the light source member 6. The eaves part 71 is provided with an engaging part 73 for detachably attaching the power supply unit 8. On the other hand, the power supply unit 8 is provided with a power supply leg portion 83 that engages with the engagement portion 73. Therefore, the lighting fixture 100 is easy to use because the power supply unit 8 can be easily attached to and detached from the heat sink 7 as needed.

Embodiment 2.
Next, a lighting fixture according to the second embodiment will be explained based on FIGS. 6 to 9. FIG. 6 is a perspective view showing a lighting fixture according to the second embodiment. FIG. 7 is an exploded perspective view showing a lighting fixture according to the second embodiment. FIG. 8 is an exploded perspective view showing the heat sink of the lighting fixture according to the second embodiment. FIG. 9 is a plan view of a fin that constitutes a heat sink of a lighting fixture according to Embodiment 2. Note that the same components as those of the lighting fixture described in Embodiment 1 are given the same reference numerals, and the description thereof will be omitted as appropriate.

As shown in FIGS. 6 and 7, a lighting fixture 101 according to Embodiment 2 includes a support section 1 that is attached to an attached part such as a ceiling, and a light source unit 5 that is held by the support section 1. ing. The support portion 1 includes an arm member 2 that is attached to the attached portion, a holding member 3 that connects the arm member 2 to the light source unit 5, and a fall prevention member 4 for the lighting fixture 101. The light source unit 5 includes a light source member 6 that emits light, a rectangular parallelepiped heat sink 7, a power supply unit 8 that supplies power to the light source member 6, and a cover member 9 that covers the light source member 6.

The lighting fixture 101 of the second embodiment differs from the lighting fixture 100 of the first embodiment in the configuration of the heat sink 7. As shown in FIGS. 8 and 9, the heat sink 7 of the lighting fixture 101 of the second embodiment includes a flat base portion 74 to which the light source member 6 is attached, and a lower end surface connected to the base portion 74. It has a fin 76 rising upward from 74 and an eaves portion 75 connected to the upper end surface of the fin 76 and covering the upper surface of the fin 76 .

The base portion 74, the eaves portion 75, and the fins 76 are made of a material with good heat dissipation, such as aluminum material. The base portion 74 has a rectangular shape, and, as shown in FIG. 9, has a plurality of through holes 74a through which a joining member 77 such as a pin or a screw is passed. Similarly, the eaves portion 75 is also square in shape, and has a plurality of through holes 75a through which connecting members 78 such as pins or screws are passed.

As shown in FIGS. 8 and 9, the fin 76 has a centrally provided cylindrical portion 76a and a plurality of plate portions 76b that protrude radially from the outer periphery of the cylindrical portion 76a. The cylindrical portion 76a is cylindrical, but may be hollow, such as a rectangular tube. Furthermore, the number of plate portions 76b is not limited to the illustrated twelve. The fins 76 in the second embodiment are formed by extrusion molding. The fins 76 are formed by cutting extruded material to the required length. The cut surface of the fin 76 serves as an end surface connected to the base portion 74 and the eaves portion 75 . In other words, since the fins 76 can make the vertical lengths of all the plate parts 76b uniform, the end surfaces of all the plate parts 76b can be brought into uniform contact with the base part 74 and the eaves part 75. .

Some of the plurality of plate parts 76b have lower end surfaces joined and connected to the base part 74, and upper end faces joined and connected to the eaves part 75. Specifically, receiving parts 79 for inserting the joining members 77 and 78 are formed in some of the plurality of board parts 76b. The heat sink 7 has the base part 74 in contact with the lower end surface of the fin 76, the joining member 77 inserted into the through hole 74a and the receiving part 79, the eaves part 75 in contact with the upper end surface of the fin 76, and the joining member 78 is inserted into the through hole 75a and the receiving portion 79.

Note that the lighting fixture 101 according to the second embodiment has a configuration in which the power supply unit 8 is placed on the upper surface of the eaves part 75 of the heat sink 7 and joined by a joining member 85, as shown in FIGS. 6 and 7. However, as described in Embodiment 1, the eaves part 75 is provided with the engaging part 73 for detachably attaching the power supply unit 8, and the power supply unit 8 is provided with the engaging part 73 for attaching the power supply unit 8 to the engaging part 73. A configuration in which leg portions 83 are provided may also be used.

As described above, since the lighting fixture 101 of the second embodiment covers the upper surface of the fin 76 with the eaves portion 75, it is possible to prevent dust from accumulating on the fin 76 due to long-term use. Furthermore, the structure is simple, with the eaves section 75 simply connected to the upper end surface of the fins 76, and there is no need to provide any special components for attaching the eaves section 75, so assembly work can be easily performed. . Further, since the fins 76 can be uniformly brought into contact with the base portion 74 and the eaves portion 75, the heat dissipation performance at the end surfaces that come into contact with the base portion 74 and the eaves portion 75 can be improved.

Although the lighting fixtures 100 and 101 have been described above based on the embodiments, the lighting fixtures 100 and 101 are not limited to the configurations of the embodiments described above. For example, the lighting fixture 100 and the lighting fixture 101 may be attached to a part other than the ceiling. Further, the illustrated lighting fixture 100 and lighting fixture 101 are merely examples, and may include other components. Furthermore, the configurations of the fins 72 and fins 76 are not limited to the illustrated configurations, and may take other configurations. Further, the engaging portion 73 provided on the eaves portion 71 is not necessarily provided and may be omitted. Further, the power supply leg part 83 provided on the power supply unit 8 may be omitted, and the power supply unit 8 may be configured to be detachable with only the engaging part 73 of the eaves part 71. In short, the lighting fixtures 100 and 101 are subject to a range of design changes and application variations that are commonly made by those skilled in the art without departing from the technical concept thereof.

1 support part, 2 arm member, 3 holding member, 4 fall prevention member, 5 light source unit, 6 light source member, 7 heat sink, 7a through hole, 8 power supply unit, 9 cover member, 20 shaft hole, 21 arcuate hole, 22, 23 bolt, 30 flat plate part, 31 upper mounting part, 32 lower mounting part, 33 nut, 34, 35 through hole, 40 wire, 41 first mounting part, 42 second mounting part, 60 substrate, 61 light emitting element, 70 base part, 71 eave part, 71a recessed part, 71b holding part, 72 fin, 72a plate part, 73 engaging part, 73a claw part, 74 base part, 74a through hole, 75 eave part, 75a through hole, 76 fin, 76a cylinder part, 76b plate part, 77, 78 joining member, 79 receiving part, 80 power supply case, 81 end plate, 82 socket, 83 power supply leg part, 83a claw part, 84 power supply wire, 85 joining member, 90 flange part, 90a penetration hole, 91 joining member, 100, 101 lighting fixture.

Claims (2)

A lighting fixture comprising a light source member that emits light, a heat sink to which the light source member is attached, and a power supply unit that supplies power to the light source member,
The heat sink is
a base portion to which the light source member is attached;
a fin whose lower end surface is connected to the base portion and rises upward from the base portion;
an eaves portion connected to the upper end surface of the fin and covering the upper surface of the fin;
an engaging part for sliding and detachably attaching the power supply unit,
The power supply unit is provided with a power supply leg that slides and engages with the engagement part,
The fin is
A cylinder part provided in the center,
a plurality of plate parts protruding radially from the outer periphery of the cylindrical part,
At least some of the plate portions have lower end surfaces joined and connected to the base portion,
At least some of the plate portions are connected at upper end surfaces to the eaves portion . The lighting fixture according to claim 1 , wherein the engaging portion is provided in the eave portion.

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