JP7446121B2 - 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 fixtures that can be attached to an attached part such as a ceiling are known. For example, Patent Document 1 discloses a lighting device that includes a board on which a plurality of LED modules are mounted, a power supply unit that supplies power to the LED modules, and a heat dissipation member that releases heat from the LED modules into the air. has been done. The heat dissipation member, which is a heat sink, has a gate-shaped configuration that extends in one direction and includes a pair of side plates and a top plate. A substrate is fixed to the top surface of the top plate. A beam portion projecting downward is provided on the lower surface of the top plate along the longitudinal direction. A power supply device is housed in a space surrounded by a pair of side plates and a top plate. The power supply device has a substantially rectangular parallelepiped shape, and its left and right side surfaces are sandwiched between a pair of side plates of a heat dissipation member, and its top surface is in contact with a beam portion and bolted. By accommodating the power supply device inside the heat dissipation member, it is possible to provide a flat appearance with no unevenness, and it is also possible to downsize the device.

Japanese Patent Application Publication No. 2013-84469

However, in the lighting device of Patent Document 1, the left and right side surfaces of the power supply device are sandwiched between the pair of side plates of the heat dissipation member, and the top surface is in contact with the beam, so the contact area between the power supply device and the heat dissipation member is large. . Therefore, in this lighting device, much of the heat transferred from the board to the heat radiating member is transferred to the power supply device, and the power supply device may be damaged by the heat.

The present invention has been made to solve the above-mentioned problems, and provides a lighting device that can suppress the heat transferred from the light source to the power supply device through the heat sink, even if the power supply device is housed inside the heat sink. The purpose is to provide equipment.

A lighting fixture according to the present invention includes a light source unit that emits light, and a frame member that is provided at a lower part of the light source unit and holds the light source unit, and the light source unit includes a light source section that emits light and a frame member that holds the light source unit. , the heat sink includes a heat sink that radiates heat generated from the light source section, and a power supply device that supplies power to the light source section, and the heat sink includes a flat base section and a base section that stands up from one surface of the base section. It has a cylindrical cylindrical part and a plurality of fins protruding outward from the outer circumferential surface of the cylindrical part, and the cylindrical part has a curved surface protruding from the inner surface toward the outer surface so that the fins extend in the circumferential direction. the power supply device is inserted into the cylindrical interior of the cylindrical portion, and the outer surface of the power supply device is in contact with a protruding portion inside the waveform wall portion; ing.

According to the lighting device of the present invention, the cylindrical portion constituting the heat sink has a wavy wall portion that is wave-shaped along the circumferential direction due to the curved surface protruding from the inner surface side toward the outer surface side, and the power supply device is connected to the cylindrical portion. Since the outer surface of the power supply device is inserted into the cylinder of the section and the outer surface of the power supply device comes into contact with a protruding portion inside the corrugated wall section, the contact area between the tube section and the power supply device can be reduced. Therefore, even in a structure in which the power supply device is housed inside the heat sink, it is possible to suppress the heat transferred from the light source section to the power supply device through the heat sink.

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. FIG. FIG. 2 is a perspective view of the lighting fixture according to Embodiment 1, showing a light source unit and a frame member separated. FIG. 2 is an explanatory diagram schematically showing a lighting fixture according to Embodiment 1, in which a lens is housed in an inner cylindrical portion of a frame member. FIG. 3 is a plan view showing a heat sink of the lighting fixture according to Embodiment 1. FIG. 6 is a plan view showing a state in which the power supply device is inserted into the heat sink shown in FIG. 5. FIG. FIG. 2 is a perspective view showing a frame member of the lighting fixture according to the first embodiment. FIG. 7 is an exploded perspective view of a light source unit of a lighting fixture according to a second embodiment. FIG. 3 is a plan view showing a heat sink of a lighting fixture according to a second embodiment. FIG. 3 is a perspective view showing a light source unit of a lighting fixture according to a second embodiment. FIG. 7 is a perspective view of a heat sink of a lighting fixture according to Embodiment 3, showing how an electric wire holding part is attached. FIG. 7 is a perspective view of a heat sink of a lighting fixture according to Embodiment 3, showing a state in which an electric wire holding part is attached. FIG. 7 is a perspective view of a heat sink of a lighting fixture according to Embodiment 3, showing a state in which a light source section is attached to a base section. FIG. 7 is a perspective view showing an electric wire holding portion of a lighting fixture according to Embodiment 3;

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. FIG. 3 is a perspective view of the lighting fixture according to Embodiment 1, showing the light source unit and the frame member separated. FIG. 4 is an explanatory diagram schematically showing a lighting fixture according to Embodiment 1, in which a lens is housed in an inner cylindrical portion of a frame member. FIG. 5 is a plan view showing the heat sink of the lighting fixture according to the first embodiment. 6 is a plan view showing a state in which the power supply device is inserted into the heat sink shown in FIG. 5. FIG. In FIG. 6, the portion where the power supply device 4 is located is indicated by dots. FIG. 7 is a perspective view showing a frame member of the lighting fixture according to the first embodiment.

The lighting fixture 100 shown in FIG. 1 is a downlight that is inserted into a small-diameter embedded hole formed in an installation target such as a ceiling, for example. The small-diameter embedded hole is, for example, a circular hole with a diameter of about 75 mm to 85 mm. Note that when the embedded hole is square, the length of the diagonal line is approximately 75 mm to 85 mm. This lighting fixture 100 includes a light source unit 10 that emits light, and a frame member 20 that is provided below the light source unit 10 and holds the light source unit 10.

The light source unit 10 irradiates light toward a room or the like. The light source unit 10 is held by a frame member 20. As shown in FIGS. 1 and 2, the light source unit 10 includes a light source section 1, a lens 2, a heat sink 3, a power supply device 4, and a terminal block 5.

The light source section 1 emits light. As shown in FIGS. 2 to 4, the light source section 1 includes a light emitting board 1a, a socket 1b, a light shielding sheet 1c, and an insulating sheet 1d. The light emitting board 1a is a board on which light emitting elements are mounted. The light emitting element is, for example, a COB (Chip On Board)-LED. The socket 1b has an opening in the center and holds the light emitting board 1a fitted into the central opening. Light emitted from the light emitting element is irradiated through the opening of the socket 1b. An electric wire (not shown) connected to the power supply device 4 is connected to the socket 1b. In the light source section 1, a power supply device 4 and a light emitting board 1a are electrically connected via the electric wire. The light shielding sheet 1c is provided to prevent light emitted from the light emitting elements from leaking into the surroundings when entering the lens 2. The light-shielding sheet 1c has an annular shape, and is disposed such that the opening edge is sandwiched between the lower surface of the socket 1b and the upper edge of the lens 2. The insulating sheet 1d has a flat plate shape, is arranged between the light emitting substrate 1a and the heat sink 3, and is provided to insulate the light emitting substrate 1a and the heat sink 3.

As shown in FIGS. 2 to 4, the lens 2 has a truncated cone shape that widens toward the irradiation side. The lens 2 controls light distribution so that the light emitted from the light emitting element is irradiated in a target direction. A flange portion 2a projecting outward is provided on the bottom edge of the lens 2 on the irradiation side. An entrance recess 2b is formed on the upper surface of the lens 2 to allow light emitted from the light emitting element to enter the inside. Note that the lens 2 is not limited to the illustrated shape, and may have other shapes.

As shown in FIGS. 1 to 3, the heat sink 3 includes a disk-shaped base portion 30, a cylindrical tube portion 31 rising from the upper surface of the base portion 30, and a plurality of tubes protruding from the outer peripheral surface of the tube portion 31 in the radial direction. It has two fins 32. The heat sink 3 is formed by pressing a metal with high thermal conductivity, such as an aluminum alloy, into a casting mold. Alternatively, the heat sink 3 is formed by pushing a metal material such as an aluminum alloy into a forging die and compressing it. The heat sink 3 emits heat transmitted from the light source section 1 attached to the lower surface of the base section 30 into the air through the fins 32.

As shown in FIG. 5, the base portion 30 is formed with a connection hole 30a for attaching the light source portion 1. As shown in FIG. As shown in FIG. 2, the light source section 1 has an insulating sheet 1d brought into contact with the lower surface of the base section 30, and a connecting member 8 such as a screw passed through a through hole formed in the socket 1b and the insulating sheet 1d. It is fixed to the base part 30 by screwing into the connection hole 30a.

Further, as shown in FIG. 5, the base portion 30 is formed with a wire hole 30b through which an output wire (not shown) for supplying power from the power supply device 4 to the light emitting substrate 1a is passed. The wire hole 30b is formed within a range surrounded by the cylindrical portion 31. Furthermore, a mounting hole 30c for fixing the light source unit 10 to the frame member 20 is formed in the base portion 30. The attachment hole 30c is formed on the outside of the cylindrical portion 31. The shaft portion of the joining member 9, such as a screw shown in FIG. 2, is passed through the attachment hole 30c. Further, as shown in FIG. 5, the base portion 30 is formed with a notch portion 30d that is a portion of the outer peripheral edge.

As shown in FIG. 5, the cylindrical portion 31 has wavy wall portions 31a and 31b which form a wave shape along the circumferential direction by curved surfaces of the same shape that protrude from the inner surface toward the outer surface. The corrugated wall portions 31a and 31b are formed at two locations at intervals in the circumferential direction of the tube portion 31 so as to be opposed to each other in the radial direction of the tube portion 31. In the case of the illustrated example, two curved surfaces are formed on one wave-shaped wall surface portion 31a, and three curved surfaces are formed on the other wave-shaped wall surface portion 31b. The cylindrical portion 31 has a non-wavy wall surface provided between the wavy wall portions 31a and 31b in the circumferential direction.

The opposing wavy wall portions 31a and 31b are formed by shifting the positions of their curved surfaces so that the tops of the wavy shapes do not face each other. This is done by dispersing the contact points between the outer surface of the power supply device 4 and the inner protruding portions of the corrugated wall portions 31a and 31b in the circumferential direction without biasing them to one part. This is to ensure that the inner surfaces of the shaped wall portions 31a and 31b are evenly sandwiched. That is, the lighting fixture 100 can firmly hold the power supply device 4 inside the cylindrical portion 31 of the heat sink 3. Note that, as shown in FIG. 5, it is preferable that the opposing wave-shaped wall portions 31a and 31b be formed by shifting the curved surfaces by a semicircular arc, but the present invention is not limited to this.

The fins 32 are provided to radiate heat generated from the light source section 1. As shown in FIG. 5, the fins 32 are provided on the corrugated wall portions 31a and 31b. In the illustrated example, as an example, five fins 32 are provided on the wavy wall portion 31a having two curved surfaces, and six fins 32 are provided on the wavy wall portion 31b having three curved surfaces. . Note that the number of fins 32 is not limited to the illustrated example.

The fins 32 are plate-shaped and have a surface substantially perpendicular to the upper surface of the base portion 30, and are provided at intervals in the circumferential direction of the cylindrical portion 31. The fins 32 are formed from the wavy wall portions 31a and 31b to the outer edge of the base portion 30 when viewed in plan as shown in FIG. Note that the fin 32 located at the location where the attachment hole 30c is formed has a length that takes into account the joining member 9 to be inserted into the attachment hole 30c. Further, at least a portion of the plurality of fins 32 protrudes outward from the tops of the curved surfaces of the wave-shaped wall portions 31a and 31b. As a result, the fins 32 can be provided as far away from the power supply device 4 as possible, so the fins 32 are less susceptible to the heat generated by the power supply 4, and the heat generated from the light source 1 can be effectively transferred to the outside. can be released to. The number of fins 32 or the area of the fins 32 may be changed depending on the brightness of the light source section 1, that is, the amount of heat emitted by the light source section 1.

The power supply device 4 changes the power supplied from the outside via the terminal block 5, and supplies power to the light emitting board 1a of the light source section 1. As shown in FIG. 2, the power supply device 4 has a structure in which a power supply board 4a is covered and protected by, for example, a cylindrical housing 4b. The housing 4b is made of resin, for example. As shown in FIG. 6, the power supply device 4 is inserted and housed inside the cylindrical portion 31 of the heat sink 3, and the outer surface of the housing 4b contacts the inner protruding portions of the corrugated wall portions 31a and 31b. A space for suppressing heat transferred from the heat sink 3 to the power supply device 4 is formed between the outer surface of the housing 4b and the curved surfaces of the corrugated wall portions 31a and 31b. By accommodating the power supply device 4 inside the cylindrical portion 31 of the heat sink 3, the lighting fixture 100 eliminates the need to separately install the power supply device 4, and can achieve miniaturization. Although not shown in the drawings, a control unit for wireless communication and the like may be housed inside the cylindrical portion 31 of the heat sink 3 together with the power supply device 4.

Further, the power supply device 4 and the light source section 1 are electrically connected through an output wire (not shown) passed through a wire hole 30b formed in the base section 30. In this lighting fixture 100, the power supply device 4 and the light source section 1 are arranged to face each other with the base section 30 in between, so the output wire can be shortened and less susceptible to noise. .

As shown in FIGS. 1 to 3, the terminal block 5 has a terminal to which an electric wire (not shown) connected to a commercial power source is connected and to which power is supplied from the commercial power source. The terminal block 5 supplies power supplied from a commercial power source to the power supply device 4 . The terminal block 5 is attached to a flat supporting member 50 that is fixed to the upper end surface of the cylindrical portion 31 of the heat sink 3 with a bonding member 50a such as a screw, using a bonding member 5a such as a screw. The support member 50 also functions as a lid that closes the upper opening of the cylindrical portion 31 of the heat sink 3.

As shown in FIGS. 3 and 7, the frame member 20 includes a reflector 6 that controls the light distribution so that the light emitted from the light emitting element is irradiated in a target direction, and a lighting fixture 100 that is mounted on a ceiling or the like. It has a mounting spring 7 that is fixed to the section.

The reflector 6 includes a conical and cylindrical reflecting section 60 that expands toward the irradiation side, an annular flange 61 that protrudes radially from the outer periphery of the reflecting section 60, and a circular flange 61 extending along the opening edge of the reflecting section 60. A cylindrical inner cylinder part 62 is provided on the outer periphery of the inner cylinder part 62 and stands up from the top surface of the reflection part 60 toward the light source unit 10; It has an outer cylinder part 63.

The reflector 60 controls the light distribution so that the light emitted from the light emitting element is irradiated in a target direction.

The collar portion 61 comes into contact with the lower surface of the ceiling when the light source unit 10 is inserted into the hole, and covers the edge of the hole.

As shown in FIGS. 4 and 7, the inner cylinder portion 62 is formed with an inner diameter slightly larger than the outer diameter of the flange portion 2a of the lens 2. The lens 2 of the light source unit 10 is accommodated within the cylinder of the inner cylinder portion 62 . The lens 2 is accommodated through the upper end opening of the inner cylinder part 62, and the flange part 2a is placed on the edge of the opening of the reflection part 60. When the heat sink 3 of the light source unit 10 is attached to the frame member 20, the movement of the lens 2 housed in the inner cylinder part 62 is restricted by pressing the upper edge of the entrance recess 2b into the socket 1b via the light shielding sheet 1c. , its position is fixed. Therefore, the lighting fixture 100 has a simple structure for attaching the lens 2, and the workability of the assembly work can be improved. Furthermore, since the lighting fixture 100 does not require any special processing on the lens 2, it is easy to manufacture and can contribute to reducing manufacturing costs.

Further, as shown in FIG. 7, the inner cylinder part 62 is provided with a convex wall part 62a that protrudes from the upper edge toward the light source unit 10 and makes surface contact with the outer peripheral surface of the socket 1b of the light source part 1. The convex wall portion 62a is provided, for example, in a range of about ⅓ of the circumference of the upper end edge of the inner cylinder portion 62. The convex wall portion 62a is provided to guide the light source portion 1 to the inner cylinder portion 62 when the light source unit 10 is attached to the frame member 20. In other words, in the lighting fixture 100, when the light source unit 10 is attached to the frame member 20, the upper edge of the lens 2 can be reliably pressed by the light source part 1 guided to the inner cylinder part 62, so that the assembly work is simplified. It is possible to improve workability and contribute to quality improvement.

As shown in FIG. 7, the outer cylinder part 63 has an inner diameter larger than the inner diameter of the inner cylinder part 62, and is provided so as to cover the outer peripheral surface of the inner cylinder part 62. The space between the inner peripheral surface of the outer cylinder part 63 and the outer peripheral surface of the inner cylinder part 62 corresponds to the position of the wire hole 30b formed in the base part 30. The output wire passed through the wire hole 30b of the base portion 30 is housed in the space. Thereby, the lighting fixture 100 can protect the output wires from the outside, and can have a good-looking appearance without exposing the output wires.

Further, as shown in FIGS. 4 and 7, the outer cylindrical portion 63 has an upper edge that protrudes more toward the light source unit 10 than the upper end of the inner cylindrical portion 62. As shown in FIGS. The outer cylinder part 63 is configured to support the base part 30 by placing it on the upper edge thereof when the light source unit 10 is attached to the frame member 20. A gap is formed between the lower surface of the base portion 30 and the upper edge of the inner cylindrical portion 62 for passing the output wire therethrough. The output wire passed through the wire hole 30b of the base portion 30 is connected to the light emitting board 1a of the light source portion 1 through the gap. Further, by forming the gap, when attaching the light source unit 10 to the frame member 20, it is possible to prevent the output wire from being accidentally pinched between the base portion 30 and the inner cylinder portion 62. If the output wire is accidentally caught between the base portion 30 and the inner cylinder portion 62, it will hinder the work of attaching the light source unit 10 to the frame member 20, and there is also a risk that the output wire will be damaged.

Moreover, two protrusions 63b protruding radially inward are provided on the upper end edge of the outer cylindrical portion 63 at intervals in the circumferential direction. An engagement hole 63c through which the shaft of the joining member 9 passes is formed in the protrusion 63b. The engagement hole 63c is formed at a position corresponding to the attachment hole 30c formed in the base portion 30 of the heat sink 3. That is, in the lighting fixture 100, the light source unit 10 is assembled into a frame by bringing the lower surface of the base portion 30 of the heat sink 3 into contact with the upper edge of the outer cylinder portion 63, and screwing the joining member 9 into the mounting hole 30c and the engagement hole 63c. It is attached to member 20.

Further, a convex portion 63d that fits into the notch 30d of the base portion 30 of the heat sink 3 is formed on a part of the upper edge of the outer cylinder portion 63. The cutout portion 30d of the base portion 30 and the convex portion 63d of the outer cylinder portion 63 serve as a positioning mechanism when the base portion 30 is supported by the upper end edge of the outer cylinder portion 63. In other words, when attaching the light source unit 10 to the frame member 20, the lighting fixture 100 can easily position the light source unit 10 by fitting the convex portion 63d and the cutout portion 30d, thereby simplifying the assembly work. Workability can be improved.

Furthermore, as shown in FIGS. 1, 2, and 7, the outer cylindrical portion 63 is provided with a mounting groove 63a on its outer surface into which one end of the mounting spring 7 is fitted and fixed. Three mounting grooves 63a are provided at intervals in the circumferential direction.

The attachment spring 7 is made of an elastic material such as stainless steel, and is a leaf spring formed by curving a band-shaped plate material. As shown in FIG. 7, the attachment spring 7 has a base end attached to the attachment groove 63a of the outer cylinder part 63, and protrudes toward the outside of the outer cylinder part 63 in the radial direction. When the lighting fixture 100 is viewed from the side, the mounting spring 7 has an arched shape that is convex upward. In the illustrated example, three attachment springs 7 are provided at intervals in the circumferential direction of the outer cylinder portion 63.

After the mounting spring 7 is elastically deformed toward the light source unit 10, it is inserted together with the light source unit 10 into an embedded hole formed in a ceiling or the like. When the attachment spring 7 is released from its elastic deformation, a warping force (restoring force) generated toward the ceiling or the like generates three forces that pull the light source unit 10 upward as a reaction. The light source unit 10 is fixed by the warping force of the mounting spring 7 and by the flange 61 of the reflector 6 coming into contact with the ceiling or the like.

As described above, the lighting fixture 100 according to the first embodiment includes the light source unit 10 that emits light and the frame member 20 that holds the light source unit 10. The light source unit 10 includes a light source section 1 that emits light, a heat sink 3 that radiates heat generated from the light source section 1, and a power supply device 4 that supplies power to the light source section 1. The heat sink 3 includes a flat base portion 30, a cylindrical tube portion 31 rising from one surface of the base portion 30, and a plurality of fins 32 protruding outward from the outer peripheral surface of the tube portion 31. are doing. The cylindrical portion 31 has wavy wall portions 31a and 31b which are curved and protrude from the inner surface toward the outer surface and are wave-shaped along the circumferential direction. The power supply device 4 is inserted into the cylindrical interior of the cylindrical portion 31, and the outer surface of the power supply device 4 is in contact with the inner protruding portions of the corrugated wall portions 31a and 31b.

In other words, the lighting fixture 100 according to the first embodiment can reduce the contact area between the cylindrical portion 31 and the power supply device 4, and thus has a compact structure in which the power supply device 4 is housed inside the heat sink 3. Even if there is, heat transferred from the light source section 1 to the power supply device 4 through the heat sink 3 can be suppressed. Therefore, the lighting fixture 100 can suppress damage to the power supply device 4 and maintain its quality over a long period of time.

Further, the wave-shaped wall portions 31a and 31b are formed at intervals in the circumferential direction of the cylindrical portion 31 so as to be opposed to each other in the radial direction of the cylindrical portion 31. The opposing wavy wall surfaces 31a and 31b are formed by shifting the positions of their curved surfaces so that the tops of the wavy shapes do not face each other.

Therefore, in the lighting fixture 100 according to the first embodiment, the contact points between the outer surface of the power supply device 4 and the inner protruding portions of the corrugated wall portions 31a and 31b are arranged in the circumferential direction without being localized. Therefore, the outer surface of the power supply device 4 is evenly sandwiched between the inner surfaces of the corrugated wall portions 31a and 31b. In other words, since the power supply device 4 is firmly held inside the cylindrical portion 31 of the heat sink 3, the lighting fixture 100 can be used safely and with confidence because there is no risk that the power supply device 4 will be misaligned due to external impact or the like. can do.

Further, at least a portion of the plurality of fins 32 protrudes outward from the tops of the curved surfaces of the wave-shaped wall portions 31a and 31b. Therefore, in the lighting fixture 100, by providing at least some of the fins 32 at a position as far away from the power supply device 4 as possible, the fins 32 are less likely to be affected by the heat generated by the power supply device 4, and the heat generated from the light source section 1 is reduced. Heat can be effectively released to the outside.

Embodiment 2.
Next, a lighting fixture according to the second embodiment will be explained based on FIGS. 8 to 10. FIG. 8 is an exploded perspective view of the light source unit of the lighting fixture according to the second embodiment. In the power supply device 4 of FIG. 8, the power supply board 4a is omitted and only the housing 4b is illustrated. FIG. 9 is a plan view showing a heat sink of a lighting fixture according to the second embodiment. FIG. 10 is a perspective view showing a light source unit 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. 8 to 10, the lighting fixture according to the second embodiment differs from the first embodiment in the configuration of the heat sink 3.

In the heat sink 3, a power supply device 4 is inserted and housed inside a cylindrical portion 31. Here, if the outer periphery is surrounded like the cylindrical part 31 shown in Embodiment 1, the operator can check the inside of the cylindrical part 31 when inserting the power supply device 4 into the cylindrical part 31. Unable to confirm. Therefore, there is a risk that problems may occur during the work, such as not being able to insert the wire into the wire hole 30b, or the wire being bent midway and not being inserted to a predetermined position.

Therefore, as shown in FIGS. 8 and 9, a slit portion 33 is formed in the cylindrical portion 31 of the heat sink 3 in the second embodiment along the cylindrical axis direction. The slit portion 33 is formed in one of the non-wavy wall surfaces provided between the wavy wall portions 31a and 31b in the circumferential direction of the cylindrical portion 31. The slit portion 33 is formed from one end of the cylinder portion 31 to the other end in the cylinder axis direction. The slit portion 33 can be easily formed not only when the heat sink 3 is cast, but also when it is forged. Note that the slit portion 33 is not limited to the configuration in which it is formed from one end to the other end of the cylinder portion 31 in the cylinder axis direction, and may be provided only in a portion, for example.

A cover member 34 made of a metal plate that closes the slit portion 33 is attached to the cylindrical portion 31, as shown in FIGS. 8 and 10. Specifically, as shown in FIGS. 8 and 9, the cylindrical portion 31 is provided with claw portions 33a that are C-shaped in plan view at both ends in the circumferential direction forming the slit portion 33. There is. As shown in FIGS. 8 and 10, the cover member 34 is attached to the cylindrical portion 31 by fitting both end edges into the C-shaped interior of the claw portion 33a. Note that the claw portion 33a is not limited to the illustrated C-shape, but may have other shapes as long as the cover member 34 can be attached to the cylindrical portion 31.

The cover member 34 is attached to the cylindrical portion 31 after the power supply device 4 is inserted into the cylindrical portion 31 . Then, in the heat sink 3, after the cover member 34 is attached to the cylindrical part 31, as shown in FIG. 10, the support member 50 is fixed to the upper end surface of the cylindrical part 31 with the joining member 50a. The cover member 34 is restrained so that one end thereof abuts against the base portion 30 of the heat sink 3 and the other end thereof is closed by the support member 50 so that it cannot move. That is, the cover member 34 can be fixed by simply fixing the support member 50 to the upper end surface of the cylindrical portion 31. Furthermore, the cover member 34 can be easily formed by being made of a metal plate.

As described above, in the lighting device according to the second embodiment, the slit portion 33 is formed in the tube portion 31 of the heat sink 3 along the tube axis direction. Therefore, in this lighting fixture, when inserting the power supply device 4 into the inside of the cylindrical part 31, the operator can check the inside of the cylindrical part 31, so that it is possible to prevent the wire from being inserted into the wire hole 30b. It is possible to prevent operational problems such as not being able to insert the product to the specified position due to the product being bent midway. In particular, the lighting device according to the second embodiment is effective when the diameter of the cylindrical portion 31 is small or when the height of the cylindrical portion 31 is high.

Further, the slit portion 33 is formed from one end of the cylinder portion 31 to the other end in the cylinder axis direction. Therefore, in the lighting device according to the second embodiment, when inserting the power supply device 4 into the inside of the cylindrical portion 31, it is possible to reliably check the inside of the cylindrical portion 31.

A metal cover member 34 that closes the slit portion 33 is attached to the cylindrical portion 31 . Therefore, in the lighting device according to the second embodiment, the cover member 34 becomes a part of the cylindrical portion 31 and can cover and protect the power supply device 4 inserted into the cylindrical portion 31.

The cylindrical portion 31 is provided with claw portions 33a at both ends in the circumferential direction formed by the slit portion 33. The cover member 34 is attached to the cylindrical portion 31 with both ends thereof fitted into the claw portions 33a. Therefore, in the illumination device according to the second embodiment, the cover member 34 can be easily attached by simply fitting the cover member 34 to the claw portion 33a, so that the workability of the assembly work is good.

Embodiment 3.
Next, a lighting fixture according to the third embodiment will be explained based on FIGS. 11 to 14. FIG. 11 is a perspective view of a heat sink of a lighting fixture according to Embodiment 3, showing how an electric wire holding part is attached. FIG. 12 is a perspective view of a heat sink of a lighting fixture according to Embodiment 3, showing a state in which an electric wire holding part is attached. FIG. 13 is a perspective view of a heat sink of a lighting fixture according to Embodiment 3, showing a state in which a light source section is attached to a base section. FIG. 14 is a perspective view showing an electric wire holding section of a lighting fixture according to Embodiment 3. Note that the same components as those of the lighting equipment described in Embodiments 1 and 2 are given the same reference numerals, and the description thereof will be omitted as appropriate.

As shown in FIGS. 11 and 12, in the lighting fixture of Embodiment 3 as well, the base portion 30 of the heat sink 3 has an electric wire hole 30b for passing the electric wire 41. It is formed. As shown in FIG. 13, the power supply device 4 inserted into the cylindrical part 31 and the light source part 1 attached to the other surface of the base part 30 where the fins 32 are not provided are inserted into the wire hole 30b. They are electrically connected by an electric wire 41 passed through them. In the lighting equipment, for example, as shown in FIG. 3, when attaching the light source unit 10 to the frame member 20, the electric wire 41 may move unintentionally, and the electric wire 41 may move between the reflector 6 and the base part 30. There is a risk of getting caught. Therefore, in the lighting equipment, when attaching the light source unit 10 to the frame member 20, an operator needs to hold the electric wire 41 with his/her hand so that the electric wire 41 does not move, making the assembly work complicated.

Therefore, in the lighting device according to the third embodiment, as shown in FIG. 13, a wire holding portion 40 that holds the wire 41 passed through the wire hole 30b is provided on the other surface of the base portion 30 where the fins 32 are not provided. is provided.

The wire holding portion 40 is made of resin material. As shown in FIGS. 11 and 14, the wire holding section 40 includes an insertion section 40a that is inserted into an insertion hole 30e formed in the base section 30 and fixed therein, and an insertion section 40a that protrudes from the other surface of the base section 30. It has a stop part 40b. As shown in FIG. 11, two insertion holes 30e are formed in the vicinity of the wire hole 30b so as to sandwich the wire hole 30b from both sides of the base portion 30 in the circumferential direction. Further, the wire hole 30b is formed so as to be located in the space between the inner cylinder part 62 and the outer cylinder part 63. Note that the number of insertion holes 30e is not limited to the two illustrated, and there may be one or more.

As shown in FIG. 14, the insertion portion 40a has a cruciform cross-sectional shape. The insertion portion 40a is formed such that the maximum width of the cross is larger than the diameter of the insertion hole 30e, and deforms from side to side when inserted into the insertion hole 30e. Thereby, when the insertion part 40a is inserted into the insertion hole 30e, it comes into close contact with the inner surface of the insertion hole 30e, so that it becomes difficult to come off from the insertion hole 30e. Further, the insertion portion 40a has a tapered slope at its distal end to make it tapered so that it can be easily inserted into the insertion hole 30e. Although not shown in the drawings, a tapered slope may also be provided on the inner surface of the insertion hole 30e. This makes it easier to insert the insertion portion 40a into the insertion hole 30e, improving workability.

In addition, although the case where the insertion part 40a is cross-shaped was demonstrated, it is not limited to this shape. The insertion portion 40a may have any shape as long as it has a protrusion that deforms under insertion pressure and a recess that absorbs the deformed shape. As an example, the insertion portion 40a may have a star shape or a cylindrical shape with a corrugated periphery.

As shown in FIG. 13, the stop portion 40b protrudes outward from the base portion 30, forms a space between it and the socket 1b in which the electric wire 41 is placed, and restricts the movement of the electric wire 41 placed in the space. do. That is, the electric wire holding section 40 holds the electric wire 41 with the stop section 40b, and prevents the electric wire 41 from moving in an unintended direction such as outside. In addition, the electric wire holding part 40 may be configured to hold the electric wire 41 between the stop part 40b and the socket 1b.

The wire holding part 40 is arranged to face the space between the inner cylinder part 62 and the outer cylinder part 63 when the light source unit 10 is attached to the frame member 20. Therefore, the wire holding section 40 does not affect the light distribution of the light source section 1. Furthermore, even if the wire holding part 40 comes off the base part 30 of the heat sink 3, it will be held in the space between the inner cylinder part 62 and the outer cylinder part 63, so that it will not fall from the lighting fixture. Nor.

As described above, the power supply device 4 inserted into the cylindrical part 31 and the light source part 1 attached to the other surface of the base part 30 are connected to the base part 30 in the third embodiment. A wire hole 30b for passing the wire 41 is formed. The base portion 30 is provided with a wire holding portion 40 that protrudes from the other surface of the base portion 30 and holds the wire 41 passed through the wire hole 30b. That is, in the lighting fixture according to the third embodiment, since the electric wire 41 that connects the power supply device 4 and the light source section 1 through the electric wire hole 30b is firmly held by the electric wire holding section 40, the light source unit 10 When attaching the reflector to the frame member 20, it is possible to prevent the electric wire 41 from being caught between the reflector 6 and the base part 30. Therefore, in the lighting fixture according to the third embodiment, when attaching the light source unit 10 to the frame member 20, there is no need for the operator to hold the electric wire 41 by hand so that the electric wire 41 does not move, and the assembly work is facilitated. Become.

The wire holding part 40 also includes an insertion part 40a that is inserted into an insertion hole 30e formed in the base part 30 and fixed therein, and a stop part 40b that protrudes from the other surface of the base part 30. ing. Generally, in the heat sink 3 formed by forging, it is difficult to form a portion that protrudes from the other surface of the base portion 30 where the fins 32 are not provided, due to the characteristics of the forging die. However, in the lighting device according to the third embodiment, the wire holding portion 40 can be attached to the base portion 30 by simply inserting the insertion portion 40a of the wire holding portion 40 into the insertion hole 30e of the base portion 30. Can be installed. Therefore, even if the heat sink 3 is formed by forging such as cold forging, it is possible to form a mechanism for holding the electric wire.

Note that the lighting fixture according to Embodiment 3 can also be implemented by combining the configurations described in Embodiment 2.

Although the lighting fixture 100 has been described above based on the first to third embodiments, the lighting fixture 100 is not limited to the configurations of the first to third embodiments described above. For example, the lighting fixture 100 may be attached to a part other than the ceiling. Further, the illustrated lighting fixture 100 is just an example, and may include other components. Further, the wave-shaped wall portions 31a and 31b may be provided over the entire circumference of the cylindrical portion 31, or may be provided only on a portion thereof. In short, the lighting fixture 100 is 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 light source section, 1a light emitting board, 1b socket, 1c light shielding sheet, 1d insulating sheet, 2 lens, 2a flange section, 2b entrance recess, 3 heat sink, 4 power supply device, 4a power supply board, 4b housing, 5 terminal block, 5a junction Member, 6 Reflector, 7 Mounting spring, 8, 9 Joint member, 10 Light source unit, 20 Frame member, 30 Base part, 30a Connection hole, 30b Wire hole, 30c Mounting hole, 30d Notch, 30e Insertion hole, 31 Cylindrical portion, 31a, 31b wave-shaped wall portion, 32 fin, 33 slit portion, 33a claw portion, 34 cover member, 40 wire holding portion, 40a insertion portion, 40b stop portion, 41 electric wire, 50 support member, 50a joining member , 60 reflective part, 61 flange part, 62 inner cylinder part, 62a convex wall part, 63 outer cylinder part, 63a mounting groove, 63b protrusion, 63c engagement hole, 63d convex part, 100 lighting fixture.

Claims (9)

A light source unit that emits light;
a frame member provided at a lower part of the light source unit and holding the light source unit,
The light source unit is
A light source unit that emits light;
a heat sink that radiates heat generated from the light source section;
a power supply device that supplies power to the light source section;
The heat sink has a flat base portion, a cylindrical tube portion rising from one surface of the base portion, and a plurality of fins protruding outward from an outer peripheral surface of the tube portion. ,
The cylindrical portion has a wavy wall portion having a wavy shape along the circumferential direction by a curved surface protruding from the inner surface side toward the outer surface side,
The power supply device is inserted into the tube of the cylindrical portion, and an outer surface of the power supply device is in contact with a protruding portion inside the corrugated wall portion. The wave-shaped wall portions are formed at intervals in the circumferential direction of the cylindrical portion so as to be opposed to each other in the radial direction of the cylindrical portion,
The lighting fixture according to claim 1, wherein the opposing wavy wall portions are formed by shifting the positions of the curved surfaces so that the tops of the wavy shapes do not face each other. The lighting fixture according to claim 1 or 2, wherein at least a portion of the plurality of fins protrudes outward from the top of the curved surface of the wavy wall portion. The lighting fixture according to any one of claims 1 to 3, wherein the cylindrical portion of the heat sink has a slit portion formed along the cylindrical axis direction. The lighting fixture according to claim 4, wherein the slit portion is formed from one end of the tube portion to the other end in the tube axis direction. The lighting fixture according to claim 4 or 5, wherein a metal cover member that closes the slit portion is attached to the tube portion. The cylindrical portion is provided with claw portions at both ends in the circumferential direction forming the slit portion,
7. The lighting fixture according to claim 6, wherein the cover member is attached to the cylindrical portion by fitting both edges thereof into the claw portion. A wire hole is formed in the base portion for passing a wire connecting the power supply device inserted into the cylindrical portion and the light source portion attached to the other surface of the base portion. Ori,
The lighting fixture according to any one of claims 1 to 7, further comprising an electric wire holding portion that protrudes from the other surface of the base portion and holds the electric wire passed through the electric wire hole. The electric wire holding part has an insertion part that is inserted into an insertion hole formed in the base part and fixed therein, and a stop part that projects from the other surface of the base part. 8. The lighting fixture according to 8.

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