JP7706049B2 - Lighting fixtures and lighting equipment - Google Patents

Description

The present invention relates to a lighting fixture for outdoor use and a lighting apparatus having a lighting fixture attached to the end of a pole.

Conventionally, lighting fixtures with a cap provided above the lighting fixture body have been known. For example, Patent Document 1 discloses a lighting fixture with a cap provided above a cast body, which is a heat dissipating body. The cap has an inclination angle, which makes it difficult for fallen leaves and snow to accumulate on the lighting fixture body.

JP 2016-110931 A

However, the above-mentioned Patent Document 1 had the problem that when there was a large amount of snow or the surface of the cap was dirty, excessive snow would accumulate on the cap, placing too much weight on the lighting fixture and pole.

The present invention was made in consideration of the above problems, and aims to provide a lighting fixture and a lighting apparatus that prevent snow from accumulating on the lampshade located above the lighting fixture.

A lamp according to one aspect of the present disclosure includes a lamp body and a cover portion provided above the lamp body, the lamp body having a light source, a base portion to which the light source is attached, and a top plate portion having a heat dissipation portion on its upper surface that is thermally connected to the base, and the heat dissipation portion dissipates heat generated by the light source to a first space surrounded by the cover portion and the top plate portion or to the cover portion.

In addition, a lighting device according to one aspect of the present disclosure includes a lamp and a pole, and the lamp is provided at the end of the pole.

The lamp and lighting fixture according to one aspect of the present disclosure can prevent snow from accumulating on the lampshade located above the lamp.

FIG. 1 is an overall perspective view of a lighting device according to an embodiment of the present disclosure; FIG. 1 is a vertical cross-sectional view of a lamp according to an embodiment of the present disclosure. FIG. 1 is a vertical cross-sectional view of a cap portion according to an embodiment of the present disclosure.

The following describes the lamp and lighting device according to the embodiments with reference to the drawings. Note that the embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, component placement and connection forms, and process order shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Furthermore, among the components in the following embodiments, components that are not described in an independent claim that indicates a superordinate concept are described as optional components.

In addition, each figure is a schematic diagram and is not necessarily a precise illustration. In addition, in each figure, substantially the same configuration is given the same reference numeral, and duplicated explanations may be omitted or simplified. This is to avoid unnecessary redundancy in the explanation and to facilitate understanding by those skilled in the art.
(Embodiment)
Fig. 1 is an overall perspective view of a lamp according to an embodiment, Fig. 2 is a vertical cross-sectional view of the lamp according to the embodiment, and Fig. 3 is a vertical cross-sectional view of a lampshade according to the embodiment.

The following describes the lighting fixture and lighting equipment according to the embodiment with reference to Figures 1 to 3. Note that in Figures 1 to 3, only the end of the pole 2 (described later) that is on the lighting fixture side is shown, and other parts are omitted. Also, in Figures 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.

As shown in FIG. 1, the lamp 1 comprises a lamp body 10, a metal plate 20 that protrudes outward from the lamp body 10, and a shade portion 30 that is provided above the lamp body 10. The lamp body 10 has a light source 11, a base portion 12, a top plate portion 13, and a globe 14. The lighting fixture 3 according to the embodiment is a street light that comprises the lamp 1 and a pole 2, with the lamp 1 provided at the end of the pole 2.

The base 12 has an adaptor part 120 and a columnar part 121. The adaptor part 120 has an opening 120a at one end, a pole contact part 120b, and a pole fixing part 120c. In the embodiment, the end of the adaptor part 120 opposite the opening 120a is closed.

A method of fixing the pole 2 in the adapter part 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 fully inserted, the end of the pole 2 on the inserted side comes into contact with the pole contact part 120b. The inner surface of the pole contact part 120b has a stepped protrusion with different protrusion amounts. In the embodiment, each of the stepped side surfaces of the protrusion has approximately the same center in a horizontal cross section. When the pole 2 is fixed, it is positioned so that the side surface of the pole 2 is aligned with the side surface of the pole contact part 120b. In the embodiment, the pole contact part 120b has three side surfaces. Therefore, at least three poles with different outer diameters can be inserted.

However, the pole contact portion 120b only needs to have a side that conforms to the side of the pole 2, and the shape of the protrusion and the side shape are not limited to those in the embodiment. Furthermore, the protrusion is not limited to a stepped shape. Even if a stepped protrusion is used, the number of steps is not limited to three as in the embodiment.

Next, the pole 2 inserted into the opening 120a is fixed by the pole fixing part 120c. In the embodiment, the pole fixing part 120c has a screw that is long in one direction. The screw of the pole fixing part 120c is attached to the pole 2 so that it can move in the radial direction of the pole 2. Therefore, by tightening the screw of the pole fixing part 120c, the screw of the pole fixing part 120c presses the pole 2 from the side, and the pole 2 can be fixed.

In the embodiment, two pole contact parts 120b are provided. Therefore, the pole 2 is fixed at three points, namely, two or more pole contact parts 120b and the pole fixing part 120c. Therefore, the lighting fixture 1 can be more stable. The number of pole contact parts 120b is not limited to two, and may be one, or three or more.

The light source 11 is, for example, a solid-state light-emitting element. The light source 11 also has a drive circuit that is mounted on a substrate and drives 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 mounting part 110. In this embodiment, the light source mounting part 110 fixes the light source 11 so that it faces the inner surface of the globe 14.

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

The columnar part 121 has a side surface 122 and is surrounded by the globe 14. In the embodiment, the light source 11 is attached to the side surface 122 via the light source attachment part 110. At this time, the light source 11, the light source attachment part 110, the columnar part 121, and the side surface 122 are thermally connected. More specifically, the light source attachment part 110, the columnar part 121, and the side surface 122 are at least partially made of a thermally conductive material and are in thermal contact with each other. The thermally conductive material is, for example, a metal such as an aluminum alloy. The light source 11 has a power supply line (not shown) and can emit light by receiving power 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.

As shown in FIG. 3, the top plate portion 13 has a heat dissipation portion 140. The heat dissipation portion 140 is provided above the top plate portion 13 and is thermally connected to the columnar portion 121. As described above, the light source 11 and the columnar portion 121 are thermally connected, so the heat dissipation portion 140 can dissipate heat generated by the light source 11. The top plate portion 13 also has a top plate screw portion 130 with a male screw protruding in the vertical direction. The details will be described later, but the cap portion 30 is attached to the top plate screw portion 130, for example.

In the embodiment, the heat dissipation section 140 is a plurality of heat dissipation fins arranged radially. The heat dissipation section 140 may be molded integrally with at least a part of the columnar section 121. In this case, the heat dissipation section 140 can efficiently dissipate the heat generated by the light source 11. The heat dissipation fins are not limited to being arranged radially, and may be arranged, for example, in a lattice pattern. The heat dissipation fins are an example of the heat dissipation section 140, and the heat dissipation section 140 is not limited to only having a configuration with heat dissipation fins.

As described above, the cap portion 30 is attached to the top of the lamp body 10 and is configured to be detachable from the lamp body 10. Therefore, the cap portion 30 can be attached to an existing lamp to give the lamp a snow-melting effect, which will be described later. In the embodiment, the cap portion 30 has a cap portion main body 31, a cap portion attachment screw 32, and a cap portion attachment member 33. More specifically, the cap portion attachment member 33, which is fixed to the cap portion 30 by the cap portion attachment screw 32, is attached to the top plate screw portion 130, thereby attaching the cap portion 30 to the top plate portion 13. In the embodiment, the cap portion attachment member 33 is formed by bending sheet metal, but the configuration and material of the cap portion attachment member 33 are not limited to this.

The shade portion 30 and the top plate portion 13 form a first space X. As described above, the heat dissipation portion 140 can dissipate heat generated by the light source 11. Therefore, the heat generated by the light source 11 is dissipated into the first space X. At this time, the temperature of the shade portion main body 31 increases due to the heat dissipated into the first space X, so the shade portion 30 can have a snow-melting effect. For the above reasons, the lighting fixture 1 according to the embodiment can prevent snow from accumulating on the shade portion.

The cap portion 30 can be made of a heat-conducting material such as an aluminum alloy to enhance the snow-melting effect.

The heat dissipation section 140 may also be in thermal contact with the cap part 30. In this case, the heat generated by the light source 11 is directly transferred from the heat dissipation section 140 to the cap part 30, thereby improving the snow melting effect of the cap part 30. In this case, the heat dissipation section 140 may be in direct contact with the cap part main body 31, or may be in direct contact with the cap part attachment member 33.

A gap g is provided between the lamp body 10 and the shade portion 30. In other words, the first space X and the external space Z, which is the space outside the lamp body 10, are connected by the gap g. At this time, air flows in and out between the external space Z and the first space X, so the heat dissipation effect of the heat dissipation portion 140 can be further improved.

The globe 14 is made of a translucent material such as glass or resin, and diffuses the light emitted by the light source 11 to the outside of the lamp body 10. The globe 14, the top plate 13, and the base 12 form a second space Y in the lamp body 10. At this time, the top plate 13 separates the first space X from the second space Y. Therefore, even if condensation occurs due to the cooling of the air in the first space X, the top plate 13 can prevent water droplets from entering the second space Y and protect the light source 11. More preferably, the top plate 13 closes the gap between the first space X and the second space Y. With this configuration, even when the shade 30 is removed, the top plate 13 can prevent fallen leaves, snow, etc. from entering the second space Y and protect the light source 11.

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

Therefore, the lighting fixture 1 according to the embodiment does not require a separate member for fixing the power supply line, and the structure can be simplified. Furthermore, since the wiring can be performed on the metal plate 20, the wiring work is easy. Furthermore, the power supply line can be easily introduced into the pole 2. Note that the method of fixing the power supply line onto the metal plate 20 is not limited to the above. For example, the power supply line may be clamped using an elastic body.
(effect)
Here, the main points of the lighting fixture and the lighting apparatus according to the embodiment will be described again.

The lamp 1 according to the embodiment includes a lamp body 10 and a shade portion 30 provided above the lamp body 10. The lamp body 10 includes 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 on its upper surface that is thermally connected to the base portion 12. The heat dissipation portion 140 dissipates heat generated by the light source 11 to the first space X surrounded by the shade portion 30 and the top plate portion 13 or to the shade portion 30.

The lighting fixture 1 having the above-mentioned configuration can prevent snow from accumulating on the lighting fixture 1.

In addition, in the lamp 1 according to the embodiment, at least a portion of the base 12 and the heat dissipation section 140 may be integrally molded.

The lighting fixture 1 having the above-mentioned configuration can efficiently dissipate heat generated by the light source 11.

In addition, in the lamp 1 according to the embodiment, the heat dissipation section 140 may be in thermal contact with the shade section 30.

The lighting fixture 1 having the above-mentioned configuration can enhance the snow-melting effect of the shade portion 30.

In addition, in the lamp 1 according to the embodiment, the lamp body 10 may further include a globe 14 that transmits the light emitted by the light source 11. The base 12, the globe 14, and the top plate 13 may form a second space Y. The top plate 13 may separate the first space X and the second space Y.

The lighting fixture 1 having the above-mentioned configuration can protect the light source 11.

In addition, in the lamp 1 according to the embodiment, a gap g may be provided between the lamp body 10 and the shade portion 30. The first space X and the external space Z outside the lamp body 10 may be connected by the gap g.

The lamp 1 having the above-mentioned configuration can further improve the heat dissipation effect of the heat dissipation section 140.

In addition, in the lamp 1 according to the embodiment, the shade portion 30 may be detachable from the lamp body 10.

In the lamp 1 having the above-mentioned configuration, the shade part 30 can be retrofitted to an existing lamp to prevent snow from accumulating on the lamp.

In addition, in the lighting fixture 1 according to the embodiment, the lighting fixture body 10 may have an adapter part 120 to which the pole 2 can be fixed. The adapter part 120 may have an opening 120a into which one end of the pole 2 can be inserted.

The lighting fixture 1 having the above-mentioned configuration can be attached to a pole 2 for mounting a street light, security light, etc.

The lighting fixture 3 according to the embodiment includes a lamp 1 and a pole 2, with the lamp 1 provided at the end of the pole 2.

The lighting fixture 3 having the above-described configuration can prevent snow from accumulating on the lighting device 1. (Other embodiments)
Although the lamp 1 and the lighting fixture according to the embodiment have been described above, the lamp 1 and the lighting fixture 3 according to the present disclosure are not limited to the embodiment.

For example, the hood 30 does not have to be attached to the top plate 13, and may be attached to the base 12. In this case, it is preferable that the hood 30 is attached so as to be thermally connected to the light source 11.

The gap g is not a required configuration, and it is sufficient that the first space X and the external space Z are in communication with each other. For example, at least one of the lamp body 10 and the shade part 30 may have an air hole that communicates with the external space Z. Even in this case, air flows in and out between the external space Z and the first space X, so the heat dissipation effect of the heat dissipation part 140 can be further improved.

In addition, the light source 11 does not have to be attached to the columnar part 121, and the light source 11 may be attached to the adapter part 120.
In this case, it is preferable that the adapter portion 120 is thermally connected to the heat dissipation portion 140.

In addition, the light source attachment section 110 is not a required component, and for example, the light source 11 may be attached directly to the base 12 with an adhesive or the like. In this case, it is preferable that the adhesive has thermal conductivity.

Reference Signs List 1: Lighting fixture 10: Lighting fixture body 11: Light source 120: Adapter portion 120a: Opening 13: Top plate portion 14: Globe 140: Heat dissipation portion 2: Pole 3: Lighting fixture 30: Shade portion X: First space Y: Second space Z: External space g: Gap

Claims (9)

The lamp includes a lamp body and a shade portion provided above the lamp body,
The lighting device body includes a light source, a base to which the light source is attached, and a top plate having a heat dissipation portion on an upper surface thereof, the heat dissipation portion being thermally connected to the base,
The heat dissipation portion is a lighting fixture that dissipates heat generated by the light source to a first space surrounded by the shade portion and the top plate portion or to the shade portion. The lamp according to claim 1 , wherein at least a portion of the base and the heat dissipation portion are integrally molded. 3. The lamp according to claim 1, wherein the heat dissipation portion is in thermal contact with the lampshade portion. The lamp body further includes a globe that transmits light emitted by the light source,
The base portion, the globe, and the top plate portion form a second space,
The lamp according to claim 1 , wherein the top plate separates the first space from the second space. A gap is provided between the lamp body and the lampshade,
The lamp according to claim 1 , wherein the first space and an external space outside the lamp body communicate with each other through the gap. 5. The lamp according to claim 1, wherein at least one of the lamp body and the shade portion has an air hole communicating with an external space outside the lamp body and the shade portion. The lamp according to claim 1 , wherein the shade portion is detachable from the lamp body. The lighting device body has an adapter part to which a pole can be fixed,
The adapter portion has an opening into which one end of the pole can be inserted.
A lamp according to any one of claims 1 to 7. A lighting device comprising: the lighting device according to any one of claims 1 to 8; and a pole;
A lighting fixture comprising the lighting fixture provided at the end of the pole.

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