Lighting fixture

Abstract

To provide a lighting fixture that enables an electric wire to be easily tension-fixed without reference to the size of a housing.SOLUTION: A lighting fixture comprises: a light source part; a power source part that supplies electric power to the light source part; a body part that holds the light source part and the power source part; and an electric wire that is connected to the power source part and pulled out to the outside of the body part. The body part has a housing in which the light source part is stored, a fin part that comprises a plurality of fins provided on the outside of the housing, and a tension fixing part that is provided in the fin part so as to tension-fix the electric wire.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a lighting fixture, and more particularly to a structure for restraining the tension of an electric wire of a lighting fixture.

Background Art

[0002] In a general lighting fixture, in order to prevent a force from being applied to a terminal portion to which an electric wire is connected when an external force is applied to the electric wire drawn out from the inside of the housing to the outside, a structure for restraining the tension of the electric wire is provided. For example, Patent Document 1 discloses that the electric wire is bent inside the appliance body and the tension of the electric wire is restrained by passing it through a plurality of notch grooves provided in the side wall portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when restraining the tension by bending the electric wire inside the appliance body as in Patent Document 1, when the lighting fixture is miniaturized, the inside of the appliance becomes narrow, and there is a problem that the tension restraining structure cannot be provided or the workability of restraining the tension deteriorates.

[0005] The present disclosure solves the above problems, and an object thereof is to provide a lighting fixture capable of easily restraining the tension of an electric wire regardless of the size of the housing.

Means for Solving the Problems

[0006] The lighting fixture according to the present disclosure includes a light source unit, a power supply unit that supplies power to the light source unit, a main body unit that holds the light source unit and the power supply unit, and an electric wire that is connected to the power supply unit and drawn out to the outside of the main body unit. The main body unit has a housing in which the power supply unit is accommodated, a fin unit including a plurality of fins provided outside the housing, and a tension stopper provided on the fin unit for tensioning the electric wire.

Effects of the Invention

[0007] According to the lighting fixture in the present disclosure, by providing the tension stopper for tensioning the electric wire on the fin unit provided outside the housing, it is possible to easily tension the electric wire regardless of the size of the housing.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the lighting fixture 100 according to the present disclosure will be described with reference to the drawings. In each drawing, those denoted by the same reference numerals are the same or corresponding ones, which is common throughout the specification. Note that in each drawing, the relative dimensional relationships or shapes of the respective constituent members may be different from the actual ones.

[0010] Embodiment 1. FIG. 1 is an external perspective view of a lighting fixture 100 according to Embodiment 1. FIG. 2 is an exploded perspective view of the lighting fixture 100 according to Embodiment 1. FIG. 3 is a schematic cross-sectional view of the lighting fixture 100 according to Embodiment 1. FIG. 4 is a bottom view of the lighting fixture 100 according to Embodiment 1. In the present disclosure, the surface that irradiates the light of the lighting fixture 100 is defined as the upper surface, and the surface opposite to the upper surface is defined as the bottom surface. Further, the direction from the upper surface to the bottom surface or from the bottom surface to the upper surface is defined as the vertical direction, the direction orthogonal to the vertical direction and along the long side direction of the light source unit 20 is defined as the left-right direction, and the direction orthogonal to the vertical direction and the left-right direction and along the short side direction of the light source unit 20 is defined as the depth direction for description.

[0011] The lighting fixture 100 of the present embodiment is, for example, a floodlight used as outdoor lighting. As shown in FIG. 1, the lighting fixture 100 includes a support portion 10 that is attached to an attachment portion (not shown) such as a mounting base or a pole, a light source unit 20 held by the support portion 10, and an electric wire 30 connected to the light source unit 20.

[0012] (Support portion 10) As shown in FIGS. 1 and 2, the support portion 10 is, for example, a member formed by bending a sheet metal into a U shape, and includes a fixing portion 11 provided with a plurality of mounting holes 111 and two arms 12 extending vertically from both ends of the fixing portion 11. The support portion 10 is fixed to the attachment portion through the plurality of mounting holes 111 provided in the fixing portion 11 with a fixing tool (not shown) such as a bolt. Further, the support portion 10 is rotatably attached to the light source unit 20 about the fixing tool 13 by fixing the arms 12 to the side surface of the light source unit 20 with a fixing tool 13 such as a bolt.

[0013] (Light source unit 20) As shown in FIGS. 2 and 3, the light source unit 20 has a light source portion 2 that irradiates light, a power supply portion 3 that supplies power to the light source portion 2, a main body portion 4 that holds the light source portion 2 and the power supply portion 3, and a fall prevention portion 5 attached to the main body portion 4. The light source portion 2 has a cover frame 21, a cover 22, a lens 23, a light source module 24, and a mounting plate 25.

[0014] The cover frame 21 is composed of a steel plate processed into a rectangular frame shape. The cover frame 21 holds the cover 22 and is attached to the main body 4 by a fixture 211 such as a screw. The cover 22 is composed of a rectangular-shaped tempered glass, and packing 221 for water stop is provided on the four sides of the cover 22. The lens 23 is arranged on the optical axis of the light source module 24 and controls the traveling direction of the light emitted from the light source module 24. The lens 23 is attached to the mounting plate 25 by a fixture 231 such as a screw.

[0015] The light source module 24 has a plurality of light-emitting elements 241 arranged in a matrix and a substrate 242 on which the plurality of light-emitting elements 241 are mounted. The plurality of light-emitting elements 241 are, for example, surface-mount type or COB type LED elements that emit daylight white light. Alternatively, the plurality of light-emitting elements 241 may be solid laser elements, semiconductor laser elements, or organic EL elements. Note that the arrangement of the plurality of light-emitting elements 241 is not limited to the example in FIG. 2 and may be arranged radially from the center of the substrate 242. The light source module 24 is attached to the mounting plate 25 by a fixture 243 such as a screw. The mounting plate 25 is composed of, for example, an aluminum plate, and in a state where the lens 23 and the light source module 24 are attached, it is attached to the main body 4 by a fixture 251 such as a screw.

[0016] The power supply unit 3 has a lighting device 31 and a substrate 32. The lighting device 31 is electrically connected to the plurality of light-emitting elements 241 by wiring (not shown) and supplies power for lighting the plurality of light-emitting elements 241. The substrate 32 holds the lighting device 31 and is attached to the main body 4 by a fixture (not shown) such as a screw. An electric wire 30 is connected to the terminal block of the substrate 32, and power from commercial power provided outside is supplied to the lighting device 31 via the electric wire 30.

[0017] As shown in FIGS. 2 to 4, the main body 4 has a housing 41, a fin portion 42, and a tension fixing portion 43 provided on the fin portion 42. The housing 41 and the fin portion 42 of the main body 4 are integrally formed by aluminum die casting.

[0018] The housing 41 has a box shape with an open top surface. Inside the housing 41, there is a mounting portion 411 for mounting the mounting plate 25. Also, around the opening of the housing 41, there is a flange 412 for mounting the cover 22 and the cover frame 21. As shown in FIG. 4, on the bottom surface of the housing 41, there is a lead-out hole 413, and the electric wire 30 connected to the power supply unit 3 is passed through the lead-out hole 413 and led out to the outside of the housing 41.

[0019] As shown in FIG. 3, in the present embodiment, the lens 23, the light source module 24, and the power supply unit 3 are housed inside the housing 41, and the housing 41 is closed by the cover 22 and the cover frame 21. Specifically, the power supply unit 3 is housed inside the housing 41 and fixed to the bottom surface of the housing 41 by a fixing tool (not shown) such as a screw. Also, the lens 23 and the light source module 24 are fixed to the mounting portion 411 of the housing 41 by the fixing tool 251 via the mounting plate 25. Further, the cover 22 and the cover frame 21 are arranged on the flange 412 of the housing 41 and fixed to the housing 41 by the fixing tool 211. With such a configuration, it is possible to prevent water from entering the inside of the housing 41 and use the lighting fixture 100 as outdoor lighting.

[0020] As shown in FIG. 4, the fin portion 42 is composed of a plurality of fins 421 provided on the outer sides of the side surface and the bottom surface of the housing 41. The plurality of fins 421 dissipate the heat generated from the light source module 24 and the power supply unit 3. In the present embodiment, the plurality of fins 421 extending in the depth direction (short side direction) of the housing 41 are arranged at intervals in the left-right direction (long side direction) of the housing 41.

[0021] The strain relief portion 43 is a structure for strain-relieving the electric wire 30. As shown in FIG. 4, the strain relief portion 43 is provided on the fin portion 42 formed on the outside of the housing 41. Details of the strain relief portion 43 will be described later.

[0022] As shown in Fig. 2, the fall prevention part 5 is composed of a wire and connection terminals provided at both ends of the wire. The fall prevention part 5 is connected to the side surface of the housing 41 and the part to be attached to which the lighting fixture 100 is attached. Even if the light source unit 20 is detached from the support part 10 by the fall prevention part 5, it is possible to suppress the light source unit 20 from falling.

[0023] (Electric wire 30) The electric wire 30 is an outlet wire or a captive cable. One end is connected to the power supply part 3 housed inside the housing 41, the other end is drawn out of the housing 41, and is connected to a commercial power supply or the like. The electric wire 30 drawn out of the housing 41 is tension-fixed by a tension fixing part 43 provided outside the housing 41.

[0024] Subsequently, with reference to Figs. 4 to 7, the structure of the tension fixing part 43 in the lighting fixture 100 of the present embodiment will be described. Fig. 5 is an exploded perspective view of the lighting fixture 100 according to Embodiment 1 as viewed from the bottom side. Fig. 6 is a partial side view of the lighting fixture 100 according to Embodiment 1. Fig. 7 is an enlarged perspective view of the tension fixing part 43 in the lighting fixture 100 according to Embodiment 1.

[0025] For primary wiring connected to the power supply inside the fixture and drawn out of the fixture like the electric wire 30 of the lighting fixture 100, it is stipulated by the Electrical Appliance and Material Safety Act that tension fixing should be performed. Here, in the case of a structure in which the power supply part 3 is housed in the housing 41 like the lighting fixture 100 of the present embodiment, when the main body part 4 is miniaturized, it is impossible to provide a tension fixing structure inside the housing 41, or the tension fixing work becomes difficult. Therefore, in the lighting fixture 100 of the present embodiment, a tension fixing part 43 is provided outside the housing 41.

[0026] As shown in FIGS. 4 and 5, the electric wire 30 connected to the power supply unit 3 is drawn out of the housing 41 from a lead-out hole 413 provided on the bottom surface of the housing 41. A bush bracket 414 and a cord bush 415 are attached to the lead-out hole 413 by fixing tools 416 such as bolts and washers. The electric wire 30 drawn out of the housing 41 is tension-fixed by a tension fixing portion 43 provided on the fin portion 42.

[0027] As shown in FIGS. 4 to 7, the tension fixing portion 43 is constituted by a part of a plurality of fins 421 that constitute the fin portion 42. Specifically, as shown in FIGS. 5 to 7, the tension fixing portion 43 is constituted by four adjacent fins 421a, 421b, 421c, and 421d. Among the four fins 421a to 421d, grooves 431 extending in the left-right direction of the housing 41 are provided in the fins 421b, 421c, and 421d. In other words, the fins 421b, 421c, and 421d are divided into two in the depth direction by the grooves 431. The width of the groove 431 is the outer diameter of the electric wire 30 + 0.5 to 1.0 mm. The groove 431 is formed, for example, by notching the fins 421b, 421c, and 421d in the left-right direction.

[0028] The electric wire 30 drawn out from the lead-out hole 413 is bent in an S shape and fitted into three gaps between the four fins 421a to 421d and the groove 431. By bending the electric wire 30 in an S shape between the fins 421a to 421d, the fins 421b and 421c can receive tension with respect to the pulling direction of the electric wire 30, and a structure can be obtained in which no tension is applied to the power supply unit 3 connected to the electric wire 30.

[0029] Also, the tension stopper 43 is provided at a position away from the heat generation region 33 of the power supply unit 3. Specifically, when the bottom surface of the housing 41 is viewed in plan as shown in FIG. 4, the tension stopper 43 is provided at a position that does not overlap with the heat generation region 33 of the power supply unit 3. The heat generation region 33 of the power supply unit 3 is a region where components that generate heat during driving are arranged among the components constituting the power supply unit 3, and is a region where the temperature becomes high when the lighting fixture 100 is lit. In FIG. 4, the heat generation region 33 is indicated by a broken line. The power supply unit 3 is housed inside the housing 41 and fixed to the bottom surface of the housing 41. As shown in FIG. 4, the heat generation region 33 of the power supply unit 3 is located near the center of the bottom surface of the housing 41. And the tension stopper 43 is arranged avoiding the heat generation region 33 of the power supply unit 3. In other words, the grooves 431 of the fins 421b, 421c, and 421d are provided outside the heat generation region 33 of the power supply unit 3, and the portions of the fins 421b, 421c, and 421d that do not overlap with the heat generation region 33 constitute the tension stopper 43.

[0030] Since the main body portion 4 also serves as a heat sink for the power supply unit 3, the bottom surface of the housing 41 becomes hot depending on the output of the lighting fixture 100. Therefore, if the tension stopper 43 is provided near the heat generation region 33 (heat source) of the power supply unit 3, heat may be transferred to the electric wire 30 disposed in the tension stopper 43, and the electric wire 30 may be thermally damaged. Therefore, in the present embodiment, the tension stopper 43 is arranged avoiding the heat generation region 33 of the power supply unit 3 which is the heat source. Thereby, thermal damage of the electric wire 30 can be suppressed, and the range of the heat-resistant temperature of the electric wire 30 to be used is widened. As a result, the options for the electric wire 30 that can be used for the lighting fixture 100 increase.

[0031] Also, the tension stopper 43 is disposed near the lead-out hole 413 through which the electric wire 30 is led out from the housing 41. In the case of FIG. 4, the lead-out hole 413 of the electric wire 30 is provided at the right end of the bottom surface of the housing 41 in the left-right direction, and the tension stopper 43 is provided on the right side of the center of the bottom surface of the housing 41. Further, in the case of FIG. 4, the lead-out hole 413 of the electric wire 30 is provided on the front side of the bottom surface of the housing 41 in the depth direction, and the tension stopper 43 is provided on the front side of the center of the bottom surface of the housing 41. Thereby, the length of the electric wire 30 can be shortened, and the cost can be reduced.

[0032] Also, as shown in FIGS. 5 to 7, a notch 432 is provided at the location where the tension stopper 43 receives the tension of the electric wire 30. In the examples of FIGS. 5 to 7, among the fins 421a to 421d that constitute the tension stopper 43, the notch 432 is provided at the corner in contact with the electric wire 30 of the second fin 421c from the right. Then, the bent portion of the electric wire 30 is disposed in the notch 432 of the fin 421c. The notch 432 may be provided at the corner in contact with the electric wire 30 at the upper part of the third fin 421b from the right, or may be provided on both the fin 421b and the fin 421c. Further, the notch 432 is not limited to being provided at the corner of the fin 421c, and may be formed by notching a part of the side in contact with the bent portion of the electric wire 30 of the fin 421c.

[0033] The size of the notch 432 shall be larger than the outer diameter of the electric wire 30. Specifically, the length in the vertical direction and the depth direction of the notch 432 shall be the outer diameter of the electric wire 30 + 0.5 to 1.0 mm. As shown in FIG. 6, by providing the tension stopper 43 with the notch 432 having a length in the vertical direction and a depth direction (D in FIG. 6) of the outer diameter of the electric wire 30 + 0.5 to 1.0 mm, a gap G is formed between the tension-stopped electric wire 30 and the bottom surface of the housing 41. The length of the gap G is about 5 mm. Thereby, the electric wire 30 is tension-stopped without contacting the bottom surface of the housing 41. Thereby, it is possible to prevent the electric wire 30 from directly receiving the heat of the housing 41 and suppress the heat loss of the electric wire 30. As a result, the range of the heat-resistant temperature of the electric wire 30 to be used is widened, and the options of the electric wire 30 that can be used for the lighting fixture 100 are increased. The shape of the notch 432 is not limited to a rectangle as shown in FIGS. 5 to 7, and may be a shape curved along the outer periphery of the electric wire 30.

[0034] As shown in FIGS. 4 to 7, the electric wire 30 tension-fixed to the tension fixing portion 43 is restricted from moving in the vertical direction by the fastener 433. The fastener 433 is a rectangular flat metal fitting. The fastener 433 is arranged to cover the electric wire 30 fitted in the gap between the fins 421a to 421d, and is fixed to the bottom surface of the housing 41 by a fixture 434 such as a screw. The fastener 433 prevents the electric wire 30 from detaching from the tension fixing portion 43. Note that the shape of the fastener 433 is not limited to the example shown in FIGS. 4 to 7, and may be a shape curved according to the diameter of the electric wire 30.

[0035] As described above, the lighting fixture 100 of the present embodiment has a tension fixing portion 43 for tension-fixing the electric wire 30 outside the housing 41. Thereby, the electric wire 30 can be easily tension-fixed regardless of the size of the housing 41. Further, since the tension fixing portion 43 of the present embodiment is configured by using a part of the fin portion 42 of the main body portion 4 that dissipates heat from the lighting fixture 100, it is not necessary to form a structure for tension fixing separately from the main body portion 4, and the manufacturing cost can also be reduced.

[0036] The above is the description of the embodiment. However, the present disclosure is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present disclosure. For example, the lighting fixture 100 is not limited to a projector used as outdoor lighting as in the above embodiment, and may be various lighting fixtures provided with a fin portion 42 for heat dissipation outside the housing 41.

[0037] Further, in the above embodiment, the tension fixing portion 43 is configured by four adjacent fins 421a to 421d, but it is not limited thereto, and it can be configured by at least three fins 421a to 421c.

[0038] Hereinafter, aspects of the present disclosure will be summarized as appendices.

[0039] (Appendix 1) A light source unit, A power supply unit that supplies power to the light source unit, a main body portion that holds the light source portion and the power supply portion; a wire connected to the power supply portion and drawn out to the outside of the main body portion, wherein the main body portion a housing that houses the power supply portion; a fin portion composed of a plurality of fins provided outside the housing; a tension stopper provided on the fin portion for tensioning the wire, (Appendix 2) The lighting fixture according to Appendix 1, wherein the tension stopper is configured by cutting out a part of the plurality of fins. (Appendix 3) The tension stopper is composed of at least three adjacent fins among the plurality of fins, The lighting fixture according to Appendix 1 or 2, wherein the wire is bent and fitted into a gap between the three fins to be tensioned. (Appendix 4) The lighting fixture according to any one of Appendices 1 to 3, wherein at least one fin constituting the tension stopper among the plurality of fins has a notch at a location where tension is applied to the wire. (Appendix 5) The lighting fixture according to Appendix 4, wherein the notch is larger than the outer diameter of the wire. (Appendix 6) The lighting fixture according to any one of Appendices 1 to 5, wherein the tension stopper is provided at a position that does not overlap with the heat generation region of the power supply portion in a plan view. (Appendix 7) The lighting fixture according to any one of Appendices 1 to 6, further comprising a fastener for preventing the wire from detaching from the tension stopper.

Description of Reference Numerals

[0040] 2 Light source unit, 3 Power supply unit, 4 Main body unit, 5 Fall prevention unit, 10 Support unit, 11 Fixing unit, 12 Arm, 13 Fixture, 20 Light source unit, 21 Cover frame, 22 Cover, 23 Lens, 24 Light source module, 25 Mounting plate, 30 Electric wire, 31 Lighting device, 32 Substrate, 33 Heat generating area, 41 Housing, 42 Fin part, 43 Tension stopper, 100 Lighting fixture, 111 Mounting hole, 211 Fixture, 221 Packing, 231 Fixture, 241 Light emitting element, 242 Substrate, 243 Fixture, 251 Fixture, 411 Mounting part, 412 Flange, 413 Lead-out hole, 414 Bush bracket, 415 Cord bush, 416 Fixture, 421, 421a, 421b, 421c, 421d Fin, 431 Groove, 432 Notch, 433 Fastener, 434 Fixture.

Claims

1. A light source unit, A power supply unit for supplying power to the light source unit, A main body unit for holding the light source unit and the power supply unit, And an electric wire connected to the power supply unit and drawn out to the outside of the main body unit. The main body unit includes A housing for accommodating the power supply unit, A fin unit composed of a plurality of fins provided outside the housing, And a tension stopper provided on the fin unit for preventing the electric wire from being tensioned. A lighting fixture having

2. The lighting fixture according to claim 1, wherein the tension stopper is configured by cutting out a part of the plurality of fins.

3. The tension stopper is composed of at least three adjacent fins among the plurality of fins, The lighting fixture according to claim 1, wherein the electric wire is bent and fitted into a gap between the three fins to be tension-stopped.

4. At least one fin constituting the tension stopper among the plurality of fins has a notch at a location where the tension of the electric wire is applied. The lighting fixture according to any one of claims 1 to 3.

5. The lighting fixture according to claim 4, wherein the notch is larger than the outer diameter of the electric wire.

6. The lighting fixture according to any one of claims 1 to 3, wherein the tension stopper is provided at a position that does not overlap with the heat generation region of the power supply unit in a plan view.

7. The lighting fixture according to any one of claims 1 to 3, further comprising a fastener for preventing the electric wire from detaching from the tension stopper.

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