JP2020136206A - Lighting fixture - Google Patents

Abstract

To improve heat dissipation while securing design property.SOLUTION: In a lighting fixture, a lighting body 20 is installed at a ceiling plane 1 by an installation part 11, the lighting body 20 has a heat radiation fin 26 covered by a cylindrical exterior part 25, the exterior part 25 has a plane located on a side of the installation part 11 and cut out so as to expose part of the heat radiation fin 26, and the exterior part 25 has a plane located on an opposite side to the installation part 11 and covering the heat radiation fin 26 entirely.SELECTED DRAWING: Figure 1

Description

The present invention relates to a luminaire.

Patent Document 1 discloses a luminaire including a light source unit, a main body to which the light source unit is attached, and a cylindrical shade in which the light source unit and the main body are arranged.

Here, the main body functions as a heat sink that dissipates heat generated in the light source portion, and the heat radiated from the heat radiating portion of the main body is discharged to the outside through the rear opening of the shade.

Japanese Unexamined Patent Publication No. 2017-33804

By the way, in the invention of Patent Document 1, since the structure is such that heat is discharged only from the rear opening of the shade, the heat dissipation area is small. Therefore, in order to increase the heat radiating area, for example, it is conceivable to eliminate the shade covering the periphery of the heat radiating portion and expose the entire heat radiating portion.

However, if the entire heat radiating portion is exposed, the appearance is deteriorated and the design is impaired, which is not preferable.

The present invention has been made in view of the above points, and an object of the present invention is to make it possible to improve heat dissipation while ensuring design.

The present invention targets a lighting fixture provided with an installation portion installed on a predetermined installation surface and a lamp main body attached to the installation portion, and has taken the following solutions.

That is, in the first invention, the lamp body has a light source, a heat radiating portion that dissipates heat generated by the light source, and a tubular exterior portion that covers the periphery of the heat radiating portion. The surface on the side of the installation portion is cut out so that a part of the heat dissipation portion is exposed, and the surface of the exterior portion on the side opposite to the installation portion covers the entire heat dissipation portion.

In the first invention, the heat radiating portion of the lamp body is covered with a tubular exterior portion. Then, the surface of the exterior portion on the installation portion side, that is, the surface that is difficult to see when a person looks at the lighting fixture is cut out so that a part of the heat radiating portion is exposed.

As a result, the heat of the heat radiating portion is discharged not only from the opening of the tubular exterior portion but also from the notch portion of the exterior portion, and the heat radiating area of the heat radiating portion can be increased to improve the heat radiating property. ..

In addition, the surface of the exterior portion opposite to the installation portion, that is, the surface that is easily noticeable when a person looks at the lighting equipment, covers the entire heat dissipation portion. As a result, the heat radiating portion is not exposed from the exterior portion and the appearance is not deteriorated, and the design can be ensured.

When the installation surface of the lighting fixture is a ceiling surface, the upper surface of the exterior portion is cut out to expose a part of the heat radiating portion. Therefore, the heat of the heat radiating portion is easily discharged upward from the notch portion on the upper surface of the exterior portion.

In the second invention, in the first invention, the heat radiating portion has a plurality of heat radiating fins extending along the axial direction of the exterior portion and erected in a direction intersecting the installation portion.

In the second invention, the heat radiating portion has a plurality of heat radiating fins. The plurality of heat radiating fins extend along the axial direction of the exterior portion and are erected in a direction intersecting the installation portion. As a result, the fin surface of the heat radiating fin is exposed from the notch portion of the exterior portion, so that the heat radiating area of the heat radiating fin can be increased and the heat radiating property can be improved.

A third invention includes, in the first or second invention, a connecting portion that connects the installation portion and the lamp body, and the connecting portion rotatably supports the lamp body.

In the third invention, the lamp body is rotatably supported by the connecting portion. As a result, the lamp body can be rotated to freely adjust the light irradiation position. Here, the notch portion of the exterior portion can be formed at a position invisible to humans even when the main body of the lamp is rotated, so that the design can be ensured.

In the fourth invention, in any one of the first to third inventions, the surface of the exterior portion on the installation portion side is cut out over a range of approximately half in the circumferential direction.

In the fourth invention, the surface of the exterior portion on the installation portion side is cut out over a range of approximately half in the circumferential direction. For example, when the installation surface of the lighting fixture is the ceiling surface, the upper half of the exterior portion is cut out.

In this way, even when a person looks at the lighting equipment, the heat dissipation area can be increased by cutting out the exterior part to the position where the heat dissipation part cannot be visually recognized, thereby improving the heat dissipation while ensuring the design. it can.

According to the present invention, it is possible to improve heat dissipation while ensuring design.

It is a perspective view which shows the structure of the lighting equipment which concerns on this embodiment. It is a side view which shows the state which luminaire is installed on the ceiling surface. It is the A direction arrow view of FIG. It is a figure corresponding to FIG. 2 which shows the state which changed the irradiation direction of a luminaire. It is a B direction arrow view of FIG. It is a rear view for demonstrating the notch range of the exterior part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely an example, and is not intended to limit the present invention, its application, or its use.

As shown in FIGS. 1 and 2, the luminaire 10 is, for example, a spotlight installed on the ceiling surface 1 (installation surface). The luminaire 10 includes an installation unit 11, a lamp body 20 that emits illumination light, and a connecting arm 12 (connecting unit) that connects the installation unit 11 and the lamp body 20.

The installation unit 11 is composed of a power supply box in which a power supply circuit is housed. The installation portion 11 is attached to a mounting rail 2 provided on the ceiling surface 1. The mounting rail 2 is provided with a contact portion (not shown). The installation portion 11 is electrically connected to the contact portion when it is attached to the attachment rail 2. The installation unit 11 supplies electric power to the lamp body 20.

The connecting arm 12 rotatably supports the lamp body 20. Specifically, the connecting arm 12 and the lamp body 20 are fastened by a knob bolt 13. Then, by loosening the knob bolt 13, the lamp body 20 can be rotated around the shaft portion of the knob bolt 13 and the posture of the lamp body 20 can be changed. Further, by tightening the knob bolt 13, the lamp body 20 can be maintained in an arbitrary posture. As a result, the illumination light can be emitted in a predetermined direction.

The lamp body 20 has a lens holder 21 and an exterior portion 25. The lens holder 21 and the exterior portion 25 are formed in a cylindrical shape and are arranged so as to be arranged in a line in the axial direction.

A light source 22 and a lens 23 are arranged inside the lens holder 21. The lens holder 21 is rotatable in the circumferential direction. When the lens holder 21 is rotated in the circumferential direction, the lens 23 moves forward or backward along a guide mechanism (not shown). This makes it possible to change the focal length of the illumination light.

The light source 22 is composed of a light emitting module having an LED (Light Emitting Diode). The light source 22 is configured to emit white light, for example. The light source 22 is, for example, a COB (Chip On Board) type LED module. The light source 22 receives electric power from the power supply circuit of the installation unit 11 and emits illumination light.

The light source 22 is attached to a base portion 27 of a heat radiating fin 26 (heat radiating portion). The heat radiating fin 26 dissipates heat generated by the light source 22. A plurality of heat radiation fins 26 are provided in a vertically erected posture at intervals in the thickness direction.

The periphery of the heat radiation fin 26 is covered with an exterior portion 25. The exterior portion 25 and the heat radiating fin 26 are integrally formed by, for example, aluminum die casting.

The exterior portion 25 is formed in a cylindrical shape. The entire heat radiation fin 26 is covered by a surface (lower surface in FIG. 2) of the exterior portion 25 opposite to the installation portion 11. Here, the lower surface of the exterior portion 25 is a surface that is easily noticeable when a person looks at the luminaire 10. Therefore, the exterior portion 25 covers the entire heat radiation fin 26 so that the heat radiation fin 26 is not exposed from the lower surface of the exterior portion 25 (see FIG. 3). As a result, the heat radiating fins 26 are not exposed from the exterior portion 25 and the appearance is not deteriorated, and the design can be ensured.

On the other hand, the surface of the exterior portion 25 on the installation portion 11 side (upper surface in FIG. 2) is cut out so that a part of the heat radiation fins 26 is exposed. Here, the upper surface of the exterior portion 25 is a surface that is difficult to see when a person looks at the luminaire 10. Therefore, even if the heat radiation fins 26 are exposed from the upper surface of the exterior portion 25, the appearance is not deteriorated.

Here, the heat radiating fin 26 extends in the axial direction of the exterior portion 25 and stands in a direction intersecting the installation portion 11. Therefore, by exposing the fin surface of the heat radiating fin 26 from the notched portion 25a of the exterior portion 25, the heat radiating area of the heat radiating fin 26 can be increased.

When the heat radiating fins 26 are exposed from the cutout portion 25a of the exterior portion 25 in this way, the heat of the heat radiating fins 26 is discharged rearward from the rear opening (right side in FIG. 2) of the exterior portion 25 and the exterior. It is also discharged upward from the notched portion 25a of the portion 25. As a result, the heat dissipation area of the heat dissipation fins 26 can be increased to improve heat dissipation.

As shown in FIG. 4, the lamp body 20 is rotatably supported by the connecting arm 12. As a result, the lamp body 20 can be rotated to freely adjust the light irradiation position. Here, the notch portion 25a of the exterior portion 25 is formed at a position invisible to humans even when the lamp body 20 is rotated, so that the design can be ensured (FIG. FIG. 5).

Further, it is preferable that the exterior portion 25 increases the heat radiation area of the heat radiation fin 26 by cutting out the heat radiation fin 26 to a position where the heat radiation fin 26 cannot be visually recognized even when a person looks at the lighting fixture 10.

In the present embodiment, as shown in FIG. 6, the surface of the exterior portion 25 on the installation portion 11 side is cut out over a range of approximately half in the circumferential direction. In the present embodiment, since the installation surface of the lighting fixture 10 is the ceiling surface 1, the upper half of the exterior portion 25 is cut out. As a result, it is possible to improve heat dissipation while ensuring design.

<< Other Embodiments >>
The embodiment may have the following configuration.

In the present embodiment, the case where the installation surface of the luminaire 10 is the ceiling surface 1 has been described, but for example, the installation surface of the luminaire 10 may be a wall surface. In this case, the surface of the exterior portion 25 on the wall surface side may be cut out so that a part of the heat radiation fins 26 is exposed.

As described above, the present invention is extremely useful and has high industrial applicability because it has a highly practical effect of being able to improve heat dissipation while ensuring design.

1 Ceiling surface (installation surface)
10 Lighting equipment 11 Installation part 12 Connecting arm (connecting part)
20 Lamp body 22 Light source 25 Exterior part 26 Heat dissipation fins (heat dissipation part)

Claims (4)

A luminaire having an installation portion installed on a predetermined installation surface and a lamp main body attached to the installation portion.
The lamp body has a light source, a heat radiating portion that dissipates heat generated by the light source, and a tubular exterior portion that covers the periphery of the heat radiating portion.
The surface of the exterior portion on the installation portion side is cut out so that a part of the heat dissipation portion is exposed.
The surface of the exterior portion opposite to the installation portion is a lighting fixture that covers the entire heat dissipation portion. In claim 1,
The heat radiating portion is a lighting fixture having a plurality of heat radiating fins extending along the axial direction of the exterior portion and standing in a direction intersecting the installation portion. In claim 1 or 2,
A connecting portion for connecting the installation portion and the lamp body is provided.
The connecting portion is a lighting fixture that rotatably supports the lamp body. In any one of claims 1 to 3,
A lighting fixture whose surface on the installation portion side of the exterior portion is cut out over a range of approximately half in the circumferential direction.

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