Lamps and lighting fixtures

Abstract

To provide a lighting fixture that restrains snow from accumulating on the lighting fixture, and a luminaire.SOLUTION: A lighting fixture 1 comprises a lighting fixture body 10, and a shade part 30 provided on an upper part of the lighting fixture body 10. The lighting fixture body 10 comprises a light source 11, a base part 12 fitted with the light source 11, and a top plate part 13 comprising a heat dissipation part 140 thermally connected to the base part 12, on an upper surface. The heat dissipation part 140 dissipates heat emitted by the light source 11, to a first space X surrounded by the shade part 30 and the top plate part 13, or the shade part 30.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a lighting fixture used outdoors and a lighting apparatus having a lighting fixture provided at an end of a pole.

Background Art

[0002] Conventionally, a lighting fixture having a hat portion provided above a lighting fixture body is known. For example, Patent Document 1 discloses a lighting fixture having a hat portion provided above a casting body that is a heat sink. By having an inclination angle, the hat portion can prevent fallen leaves and snow from accumulating on the lighting fixture body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the above Patent Document 1, there is a problem that when the amount of snow accumulation is large or the surface of the hat portion is dirty, excessive snow accumulates on the hat portion, and too much load is applied to the lighting fixture and the pole.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a lighting fixture and a lighting apparatus that suppress snow accumulation on a hat portion provided above the lighting fixture.

Means for Solving the Problems

[0006] A lighting fixture according to an aspect of the present disclosure includes a lighting fixture body and a hat portion provided above the lighting fixture body. The lighting fixture body includes a light source, a base to which the light source is attached, and a top plate portion having a heat dissipation portion thermally connected to the base on an upper surface. The heat dissipation portion dissipates heat generated by the light source to a first space surrounded by the hat portion and the top plate portion or to the hat portion.

[0007] In addition, a lighting fixture according to an aspect of the present disclosure includes a lamp unit and a pole, and the lamp unit is provided at an end of the pole.

Advantages of the Invention

[0008] The lamp unit and the lighting fixture according to an aspect of the present disclosure can suppress snow from accumulating on a cap portion provided above the lamp unit.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0010] Hereinafter, a lamp unit and a lighting fixture according to an embodiment will be described with reference to the drawings. Note that each of the embodiments described below shows comprehensive or specific examples. Numerical values, shapes, materials, components, arrangement positions and connection forms of the components, order of steps, etc. shown in the following embodiments are merely examples and are not intended to limit the present disclosure. In addition, among the components in the following embodiments, components not described in the independent claims indicating the most general concept are described as optional components.

[0011] Each drawing is a schematic diagram and is not necessarily drawn precisely. Also, in each drawing, substantially the same configuration is denoted by the same reference numeral, and duplicate descriptions may be omitted or simplified to avoid making the description unnecessarily redundant and to facilitate understanding by those skilled in the art. (Embodiment) FIG. 1 is an overall perspective view of a lamp unit according to an embodiment. FIG. 2 is a vertical cross-sectional view of the lamp unit according to the embodiment. FIG. 3 is a vertical cross-sectional view of the cap portion according to the embodiment.

[0012] Hereinafter, the lighting fixture and the lighting apparatus according to the embodiment will be described with reference to FIGS. 1 to 3. In FIGS. 1 to 3, only the end portion on the lighting fixture side of the pole 2 to be described later is shown, and other portions are omitted. Also, in FIGS. 1 to 3, the longitudinal direction of the pole 2 is defined as the vertical direction, and the plane with the vertical direction as the normal direction is defined as the horizontal plane.

[0013] As shown in FIG. 1, the lighting fixture 1 includes a lighting fixture main body 10, a sheet metal 20 protruding outside the lighting fixture main body 10, and a cap portion 30 provided above the lighting fixture main body 10. The lighting fixture main body 10 has a light source 11, a base portion 12, a top plate portion 13, and a globe 14. Further, the lighting apparatus 3 according to the embodiment includes the lighting fixture 1 and the pole 2, and is a street lamp in which the lighting fixture 1 is provided at the end of the pole 2.

[0014] The base portion 12 has an adapter portion 120 and a columnar portion 121. The adapter portion 120 has an opening 120a with one end open, a pole contact portion 120b, and a pole fixing portion 120c. In the embodiment, one end of the adapter portion 120 opposite to the opening 120a is closed.

[0015] The method of fixing the pole 2 to the adapter portion 120 will be described in detail. First, one end of the cylindrical pole 2 is inserted into the opening 120a. When the pole 2 is inserted sufficiently, the inserted end portion of the pole 2 comes into contact with the pole contact portion 120b. On the inner peripheral surface of the pole contact portion 120b, protrusions with different protrusion amounts are formed in a stepped manner. In the embodiment, the centers of the stepped side surfaces of the protrusions are substantially the same in the horizontal cross-section. When the pole 2 is fixed, the side surface of the pole 2 is arranged along the side surface of the pole contact portion 120b. In the embodiment, the pole contact portion 120b has three side surfaces. Therefore, at least three types of poles with different outer diameters can be inserted.

[0016] However, the pole contact portion 120b only needs to have its side surface along the side surface of the pole 2, and the protruding shape and side surface shape are not limited to the embodiments. Further, the protrusion is not limited to being stepped. Also, even when adopting a stepped protrusion, the number of steps is not limited to three steps in the embodiments.

[0017] Next, the pole 2 inserted into the opening 120a is fixed by the pole fixing portion 120c. In the embodiment, the pole fixing portion 120c has a screw that is long in one direction. The screw of the pole fixing portion 120c is attached to the pole 2 so as to be movable in the radial direction of the pole 2. Therefore, by tightening the screw of the pole fixing portion 120c, the screw of the pole fixing portion 120c can press the pole 2 from the side surface and fix the pole 2.

[0018] In the embodiment, two pole contact portions 120b are provided. Therefore, the pole 2 is fixed at three points, namely, two or more pole contact portions 120b and the pole fixing portion 120c. Accordingly, the lighting fixture 1 can be made more stable. Note that the number of the pole contact portions 120b is not limited to two, and may be one or three or more. be provided.

[0019] The light source 11 is, for example, a solid-state light-emitting element. Also, the light source 11 is mounted on a substrate and has a drive circuit for driving the solid-state light-emitting element. As shown in FIG. 2, the light source 11 is fixed to the base 12 via the light source attachment portion 110. In the present embodiment, the light source attachment portion 110 fixes the light source 11 so as to face the inner surface of the globe 14.

[0020] The light source attachment portion 110 has a screw for fixing the light source 11 and a screw for attaching the light source attachment portion 110 to the base 12. Also, the solid-state light-emitting element of the light source 11 is, for example, an LED (Light Emitting Diode).

[0021] The columnar portion 121 has a side surface 122 and is surrounded by the glove 14. In the embodiment, the light source 11 is attached to the side surface 122 via the light source attachment portion 110. At this time, the light source 11, the light source attachment portion 110, the columnar portion 121, and the side surface 122 are thermally continuous. More specifically, at least a part of the light source attachment portion 110, the columnar portion 121, and the side surface 122 is composed of a thermally conductive member, and they are in thermal contact with each other. The thermally conductive member is, for example, a metal such as an aluminum alloy. Further, the light source 11 has a power supply line (not shown) and can emit light by receiving power supply from the outside via the power supply line. In the embodiment, the power supply line has a connection terminal that can be connected to one end of an electric wire that supplies power from the outside. The power supply line is, for example, a lead wire.

[0022] As shown in FIG. 3, the top plate portion 13 has a heat radiating portion 140. The heat radiating portion 140 is provided above the top plate portion 13 and is thermally continuous with the columnar portion 121. As described above, since the light source 11 and the columnar portion 121 are thermally continuous, the heat radiating portion 140 can radiate the heat generated by the light source 11. Further, the top plate portion 13 further has a top plate screw portion 130 in which a female screw projects in the vertical direction. Details will be described later, but the cap portion 30 is attached to the top plate screw portion 130, for example.

[0023] In the embodiment, the heat radiating portion 140 is a plurality of heat radiating fins arranged radially. Further, the heat radiating portion 140 may be integrally formed with at least a part of the columnar portion 121. At this time, the heat radiating portion 140 can efficiently radiate the heat generated by the light source 11. Note that the arrangement of the heat radiating fins is not limited to the radial arrangement, and for example, they may be arranged in a lattice shape. Further, the heat radiating fin is an example of the heat radiating portion 140, and the heat radiating portion 140 is not limited to only a configuration having the heat radiating fin.

[0024] The cover part 30 is attached above the lamp body 10 as described above and is configured to be detachable from the lamp body 10. Therefore, the cover part 30 can be retrofitted to an existing lamp to give the lamp the snow melting effect described later. In the embodiment, the cover part 30 includes a cover body 31, a cover attachment screw 32, and a cover attachment member 33. More specifically, the cover attachment member 33 fixed to the cover part 30 by the cover attachment screw 32 is attached to the top plate screw part 130, so that the cover part 30 is attached to the top plate part 13. In the embodiment, the cover attachment member 33 is formed by bending a sheet metal, but the configuration and material of the cover attachment member 33 are not limited to this.

[0025] The cover part 30 and the top plate part 13 form a first space X. As described above, the heat radiating part 140 can radiate the heat generated by the light source 11. Therefore, the heat generated by the light source 11 is radiated into the first space X. At this time, the temperature of the cover body 31 increases due to the heat radiated into the first space X, so that the cover part 30 can have a snow melting effect. For the above reasons, the lamp 1 according to the embodiment can suppress snow accumulation on the cover part.

[0026] Note that the cover part 30 can be formed of a heat conductive member such as an aluminum alloy to enhance the snow melting effect.

[0027] Also, the heat radiating part 140 may be in thermal contact with the cover part 30. At this time, the heat generated by the light source 11 is directly heat transferred from the heat radiating part 140 to the cover part 30, so that the snow melting effect of the cover part 30 can be enhanced. At this time, the heat radiating part 140 may be in direct contact with the cover body 31 or may be in direct contact with the cover attachment member 33.

[0028] Also, a gap g is provided between the lamp body 10 and the cover part 30. That is, the first space X and the external space Z, which is the space outside the lamp body 10, communicate with each other through the gap g. At this time, air flows in and out between the external space Z and the first space X, so that the heat radiating effect of the heat radiating part 140 can be further enhanced.

[0029] The globe 14 is composed of a translucent member such as glass or resin, and diffuses the light emitted by the light source 11 to the outside of the luminaire body 10. Further, the globe 14, the top plate portion 13, and the base portion 12 form a second space Y in the luminaire body 10. At this time, the top plate portion 13 partitions the first space X and the second space Y. Therefore, even when condensation occurs due to the air in the first space X being cooled, the top plate portion 13 can suppress water droplets from entering the second space Y and protect the light source 11. More preferably, the top plate portion 13 closes the space between the first space X and the second space Y. With this configuration, even when the cap portion 30 is removed, the top plate portion 13 can prevent fallen leaves, snow, etc. from entering the second space Y and protect the light source 11.

[0030] The sheet metal 20 protrudes from the opening 120a to the outside of the luminaire body 10. The sheet metal 20 is attached to the columnar portion 121 and can attach a power supply line for supplying power to the light source 11. In the embodiment, the power supply line connected to the light source 11 and the power supply line connected to an external power source are clamped by an annular member that can be screwed onto the sheet metal 20. And the terminal of the power supply line connected to the light source 11 and the terminal of the power supply line connected to an external power source are connected on the sheet metal 20.

[0031] Therefore, the luminaire 1 according to the embodiment does not need to separately provide a member for fixing the power supply line, and the structure can be simplified. Also, since wiring can be done on the sheet metal 20, the wiring work is easy. Also, it is possible to facilitate the introduction of the power supply line into the pole 2. Note that the method of fixing the power supply line to the sheet metal 20 is not limited to the above. For example, clamping using an elastic body may be used. (Effect) Here, the main points of the luminaire and the lighting fixture according to the embodiment will be described again.

[0032] The lighting fixture 1 according to the embodiment includes a lighting fixture main body 10 and a cap portion 30 provided above the lighting fixture main body 10. The lighting fixture main body 10 has a light source 11, a base portion 12 to which the light source 11 is attached, and a top plate portion 13 having a heat dissipation portion 140 thermally connected to the base portion 12 on the upper surface. The heat dissipation portion 140 dissipates the heat generated by the light source 11 to the first space X surrounded by the cap portion 30 and the top plate portion 13 or to the cap portion 30.

[0033] The lighting fixture 1 having the above configuration can suppress snow from accumulating on the lighting fixture 1.

[0034] Also, in the lighting fixture 1 according to the embodiment, at least a part of the base portion 12 and the heat dissipation portion 140 may be integrally formed.

[0035] The lighting fixture 1 having the above configuration can efficiently dissipate the heat generated by the light source 11.

[0036] Also, in the lighting fixture 1 according to the embodiment, the heat dissipation portion 140 may be in thermal contact with the cap portion 30.

[0037] The lighting fixture 1 having the above configuration can enhance the snow melting effect of the cap portion 30.

[0038] Also, in the lighting fixture 1 according to the embodiment, the lighting fixture main body 10 may further have a globe 14 that transmits the light emitted by the light source 11. The base portion 12, the globe 14, and the top plate portion 13 may form a second space Y. The top plate portion 13 may partition the first space X and the second space Y.

[0039] The lighting fixture 1 having the above configuration can protect the light source 11.

[0040] Also, in the lighting fixture 1 according to the embodiment, a gap g may be provided between the lighting fixture main body 10 and the cap portion 30. The first space X and the external space Z outside the lighting fixture main body 10 may be communicated by the gap g.

[0041] The lighting fixture 1 having the above-described configuration can further enhance the heat dissipation effect of the heat dissipation part 140.

[0042] Also, in the lighting fixture 1 according to the embodiment, the cap part 30 may be detachable from the lighting fixture body 10.

[0043] In the lighting fixture 1 having the above-described configuration, the cap part 30 can be retrofitted to an existing lighting fixture to prevent snow from accumulating on the lighting fixture.

[0044] Also, in the lighting fixture 1 according to the embodiment, the lighting fixture body 10 may have an adapter part 120 capable of fixing the pole 2. Further, the adapter part 120 may have an opening 120a into which one end of the pole 2 can be inserted.

[0045] The lighting fixture 1 having the above-described configuration can be attached to the pole 2 for attaching street lights, security lights, etc.

[0046] Also, the lighting apparatus 3 according to the embodiment includes the lighting fixture 1 and the pole 2, and the lighting fixture 1 is provided at the end of the pole 2.

[0047] The lighting apparatus 3 having the above-described configuration can prevent snow from accumulating on the lighting fixture 1. (Other embodiments) As described above, the lighting fixture 1 and the lighting apparatus according to the embodiment have been described, but the lighting fixture 1 and the lighting apparatus 3 according to the present disclosure are not limited to the embodiment.

[0048] For example, the cap part 30 does not necessarily have to be attached to the top plate part 13, and may be attached to the base part 12. At this time, the cap part 30 is preferably attached so as to be thermally connected to the light source 11.

[0049] Also, the gap g is not an essential component, and it is only necessary for the first space X and the external space Z to communicate with each other. For example, at least one of the lamp body 10 or the cap portion 30 may have air holes that communicate with the external space Z. Even in this case, since air can enter and exit between the external space Z and the first space X, the heat dissipation effect of the heat dissipation portion 140 can be further enhanced.

[0050] Also, the light source 11 does not necessarily have to be attached to the columnar portion 121 and may be attached to the adapter portion 120. At this time, it is preferable that the adapter portion 120 is thermally connected to the heat dissipation portion 140.

[0051] Also, the light source attachment portion 110 is not an essential component. For example, the light source 11 may be directly attached to the base portion 12 with an adhesive or the like. At this time, it is preferable that the adhesive has heat conductivity.

Explanation of Reference Numerals

[0052] 1 Lamp 10 Lamp Body 11 Light Source 120 Adapter Portion 120a Opening 13 Top Plate Portion 14 Glove 140 Heat Dissipation Portion 2 Pole 3 Lighting Fixture 30 Cap Portion X First Space Y Second Space Z External Space g Gap

Claims

1. A lighting fixture comprising a lighting fixture body and a cap portion provided above the lighting fixture body. The lighting fixture body has a light source, a base to which the light source is attached, and a top plate portion having a heat dissipation portion thermally connected to the base on its upper surface. The heat dissipation portion dissipates the heat generated by the light source to a first space surrounded by the cap portion and the top plate portion or to the cap portion. Lighting fixture.

2. At least a part of the base and the heat dissipation portion are integrally formed. The lighting fixture according to Claim 1.

3. The heat dissipation portion is in thermal contact with the cap portion. The lighting fixture according to Claim 1 or Claim 2.

4. The lighting fixture body further has a globe that transmits the light emitted by the light source. The base, the globe, and the top plate portion form a second space. The top plate portion separates the first space and the second space. The lighting fixture according to any one of Claims 1 to 3.

5. A gap is provided between the lighting fixture body and the cap portion. The lighting fixture according to any one of Claims 1 to 4, wherein the first space and the external space outside the lighting fixture body communicate with each other through the gap.

6. At least one of the lighting fixture body or the cap portion has air holes communicating with the external space outside the lighting fixture body and the cap portion. The lighting fixture according to any one of Claims 1 to 4.

7. The cap portion is detachable from the lighting fixture body. The lighting fixture according to any one of Claims 1 to 6.

8. The lighting fixture body has an adapter portion capable of fixing a pole. The adapter portion has an opening into which one end of the pole can be inserted. The lighting fixture according to any one of Claims 1 to 7.

9. A lighting fixture comprising the lighting fixture according to any one of Claims 1 to 8 and a pole. The lighting fixture is provided at an end of the pole. Lighting apparatus.

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