JP2019032956A - Light fitting - Google Patents

Abstract

To provide a light fitting which enables an arm to be moved by a light-weight and inexpensive structure in a manner such that interference between components is prevented even if a movable angle is large.SOLUTION: A light fitting according to an embodiment of the invention has: a light source part; a body in which the light source part is attached to the front surface side; an arm which has an attachment part and a pair of side plate parts, is connected to the body while supporting the body in a swingable manner, and is attached with the attachment part fixed to a ceiling; and a power source part which is provided connected to and is located closer to the back surface side relative to the body and between the pair of side plate parts and is formed in a manner such that its length as seen in a width direction of the side plate part is shorter than its length in a direction between the pair of side plate parts.SELECTED DRAWING: Figure 1

Description

  The technical field of the present invention relates to a lighting fixture.

  2. Description of the Related Art Conventionally, lighting fixtures are known in which an arm is fixed to a high ceiling or the like, and a light source is moved so that a light emitting surface faces downward. In such a lighting fixture, a frame for installing a power supply unit is provided on the back side of the light source unit.

  However, the provision of such a frame increases the weight of the lighting fixture and increases the cost. For this reason, weight reduction of the lighting fixture was desired.

JP 2013-007394 A

  The problem to be solved by the present invention is to provide a luminaire that can move a light source unit so that components do not interfere with each other with a light and inexpensive configuration even when the movable angle is large.

  A lighting fixture according to an embodiment of the present invention includes a light source part, a main body to which the light source part is attached on the front side, an attachment part and a pair of side plate parts, and supports the main body so that the main body can be swung. Connected and provided with an arm that is fixedly attached to the ceiling and attached to the ceiling, and connected to the back side of the main body and between the pair of side plate portions, and the length in the direction between the pair of side plate portions. And the power source part formed with a short length in the width direction of the side plate part.

According to the embodiment of the present invention, it is possible to provide a lighting fixture that can move the light source unit so that the components do not interfere with each other with a light and inexpensive configuration even when the movable angle is large.

It is a perspective view which shows the lighting fixture in embodiment of this invention. It is an exploded view which shows the lighting fixture in embodiment of this invention. It is a side view which shows the lighting fixture in embodiment of this invention. It is a side view which shows the modification of the lighting fixture in embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. In the following description, the installation location direction of the ceiling or the like to which the lighting apparatus according to the embodiment of the present invention is attached will be described as the back side, and the irradiation direction facing the back side will be described as the front side.

  As shown in FIGS. 1 and 2, the lighting apparatus according to the embodiment of the present invention includes an arm 1 formed in a substantially U-shape and a pair of side plates 12 and 12 of the arm 1 extending in the front-back direction. Connected to and fixed to the housing-like power supply unit 2, the plate-like connection unit 3 connected to the end of the arm 1, and the radiator 4 provided on the front side of the power supply unit 2 The plate-like main body 5 that connects and fixes the unit 3 and the radiator 4, the light source unit 6 that is provided on the front surface side of the main unit 5 and is supplied with power from the power source unit 2, and the light emission from the light source unit 6 And a light-transmitting cover portion 8 provided so as to cover the front surface of the light source portion 6 and the reflection portion 7.

  As shown in FIG. 1, the arm 1 is a thin plate member made of a metal such as aluminum or iron. The arm 1 has a long plate-like attachment portion 11 attached to an installation place such as a ceiling on the back side. The arm 1 also has a pair of side plate portions 12 formed so that both end portions of the attachment portion 11 are extended and bent toward the front side. A bent portion formed between the attachment portion 11 and the side plate portion 12 is referred to as a bent portion 13.

The attachment portion 11 is provided with a hole 111 penetrating in the front-back direction. When installing the luminaire according to the embodiment of the present invention in an installation place such as a ceiling, after passing through the hole 111 fixed to the installation place from the back side to the front side, a fixing member such as a nut Is fastened to the suspension bolt or the like from the front side of the mounting portion 11 to support and fix the arm 1.

The pair of side plate portions 12 and 12 have a power supply connection portion 121 between which a power supply portion 2 described later is connected and fixed by a fixing member (not shown) such as a screw. The power supply connection parts 121 are provided, for example, arranged in two places on a line parallel to the main surface (surface having the largest area) 21 of the power supply part 2.

Each of the pair of side plate portions 12 and 12 is provided with a circular fulcrum hole 122 through which a screw member can pass through in front of the power supply connection portion 121. Further, on the front side of the fulcrum hole 122, elongated holes 123 are provided on the circumference centering on the fulcrum hole 122, respectively.

As shown in FIG. 3, the side plate portion 12 has a narrow narrow portion 124 on the front side of the bent portion 13. The power connection part 121 is provided on the front side from the narrow part 124.

The power supply unit 2 is fixed and connected between the side plate portions 12 and 12 of the arm 1.

The power source unit 2 is formed as a metal substantially rectangular parallelepiped housing as shown in FIG. 1, and as shown in FIG. 2, the terminal unit 22 having terminals connectable to an external power source and the lighting of the light source unit 6 to be described later A control board 23 that performs control is provided. The power supply unit 2 has, for example, a main surface 21 having the largest area on the front side and the back side. In the vicinity of the center of the main surface 21 on the back side, a cord hole 24 is formed for electrical connection with a light source unit 6 described later and a cord (not shown).

As shown in FIGS. 1 and 3, the length of the power supply unit 2 in the front-back direction is formed shorter than the length of the side plate unit 12 in the front-back direction. Specifically, the back main surface of the power supply unit 2 has a space between the mounting part 11 of the arm 1 and a fixing member such as a screw in the hole 111 when the mounting part 11 of the arm 1 is attached to the installation location. It is attached so that it can be installed.

In the embodiment of the present invention, as shown in FIG. 3, the side surface of the power supply unit 2 is provided at a position at least partially overlapping the narrow portion 124 when viewed from the side surface on the side plate portion 12 side.

Further, as shown in FIG. 1, the length X between the pair of side plate portions 12, 12 of the power supply unit 2 is formed to be substantially the same as that between the pair of side plate portions 12, 12.

Further, the length Y, which is the length in the width direction of the side plate portion 12 in the power supply unit 2, is shorter than the length X between the pair of side plate portions 12 and 12 of the power supply unit 2. The length Y, which is the length in the width direction of the side plate 12 in the power supply unit 2, is 30 degrees along the long hole 123 between the connecting unit 3 and the light source unit 6 connected to the connecting unit 3 described later. It is formed in a length that does not come into contact with the heatsink 4 when it is moved. Further, the length Y, which is the length in the width direction of the side plate portion 12 in the power supply unit 2, is formed to be longer than the width of the side plate portion 12.

Thus, when the main body 5 and the light source section 6 are swung along the long hole 123, the circular surface of the power supply section 2 and the main body 5 are connected without forming the length in the longitudinal direction of the side plate section 12 of the arm 1 long. The effect is that the back surface of the radiator 4 is less likely to interfere.

The connecting portion 3 is formed as a substantially L-shaped metal thin plate, for example, and is provided so that the front side is connected to a body 5 described later and extends to the back side. The pair of connecting portions 3 are provided at positions facing each other that can be connected to the pair of side plate portions 12, 12 of the arm 1.

The connecting portion 3 has a rear side communication hole 31 and a front side communication hole 32 corresponding to the fulcrum hole 122 and the long hole 123 of the arm 1. The back side communication hole 31 and the front side communication hole 32 are each formed in a circular shape. The back-side communication hole 31 is connected to the fulcrum hole 122, and the front-side communication hole 32 is connected to the arm 1 and the connecting portion 3 by inserting a fixing member such as a screw together with the elongated hole 123.

When the lighting apparatus according to the embodiment of the present invention is attached to the installation place, first, a fixing member such as a screw is inserted into the back side communication hole 31 and the fulcrum hole 122 to support and connect the arm 1 and the connecting portion 3. Then, the radiator 3, the main body 5, and the light source unit 6 connected to the coupling part 3 and the coupling part 3 can be slid so that the front side communication hole 32 extends along the long hole 123.

At this time, when the swing angle is increased, the back side outer edge of the swinging main body 5 and the radiator 4 is less likely to interfere with the vicinity of the front side outer edge of the power source 2 fixed to the arm 1. The length Y in the width direction of the side plate portion 12 in 2 is formed such that the length is shortened with the power supply connecting portion 121 connected to the side plate portion 12 as a substantial center.

The radiator 4, the main body 5 connected to the connecting portion 3 and the connecting portion 3, the heat sink 4, the main body 5, connected to the connecting portion 3 and the connecting portion 3 in a state where the light source portion 6 can swing relative to the arm 1. Adjust the angle of the light source part 6, insert a fixing member such as a screw into the front side communication hole 32 and the long hole 123 and tighten it, and connect the connecting part 3 and the radiator 4, the main body 5, and the light source connected to the connecting part 3. The part 6 and the arm 1 are supported and fixed.

The radiator 4 is composed of a plurality of fins made of metal pieces having excellent heat dissipation and formed in a plurality of substantially rectangular shapes provided in parallel so as to protrude to the back side of the rectangular plate-shaped metal main body 5. The plurality of fins are provided in parallel in a direction in which the longitudinal direction is orthogonal to the attachment portion 11 and the side plate portion 12 of the arm 1.

As shown in FIG. 3, the length of the fin in the longitudinal direction is longer than the length of the power supply unit 2 in the same direction. This prevents the radiator 4 and the power supply unit 2 from colliding even if the connecting part 3 is swung along the long hole 123, and the airflow to the rear side of the radiator 4 is not hindered, Heat dissipation can be improved.

The main body 5 is thermally connected to the front side of the radiator 4. The main body 5 may be formed integrally with the radiator 4 or may be formed as a separate body and connected via a metal member or grease having excellent thermal conductivity. Further, the main body 5 and the light source unit 6 may be formed integrally or may be formed as separate bodies and connected via a metal member or grease having excellent thermal conductivity. The main body 5 is connected to the connecting portion 3 by a fixing member (not shown) such as a screw. The front surface of the connecting portion 3 may be formed integrally with the main body 5, and the connecting portion 3 at that time may be provided so as to protrude from the back side of the main body 5 instead of being substantially L-shaped.

The light source unit 6 shown in FIG. 2 is a substrate provided with a plurality of light emitting elements such as LEDs (Light Emitting Diodes) provided on the front side of the plate-like main body 5. The light source unit 6 is electrically connected to the power source unit 2 and emits light when supplied with power.

The reflection unit 7 shown in FIG. 2 is provided as a member that controls reflection of light emitted from the light source unit 6. For example, the reflecting portion 7 is formed as a resin-made cylindrical casing having an inner diameter that surrounds the plurality of light emitting elements of the light source section 6, and has a mirror surface portion on the inner periphery of the cylindrical casing, and emits light from the plurality of light emitting elements. Is reflected to irradiate the front side of the reflector 7. The reflection unit 7 may be formed of a plurality of cylindrical casings, or may be a mirror member provided so as to surround the periphery of the substrate of the light source unit 6.

The cover portion 8 is formed as a light-transmitting member such as glass or resin. The cover unit 8 is formed so as to cover the front surface and side surfaces of the reflection unit 7 and the light source unit 6, and is fixed to the substrate of the light source unit 6 from the front surface or the side surface by screwing or the like.

In the lighting apparatus according to the embodiment of the present invention, the length Y in the movable direction of the light source unit 6 in the power supply unit 2 is shorter than the length X in the direction perpendicular to Y, so that the arm 1 has a long hole 123. The power source unit 2 and the radiator 4 are less likely to interfere with each other when moving along.

In other words, the light source unit 6 can be reduced by a lighter and cheaper method than the conventional configuration that requires additional members such as a frame for mounting the power source unit 2 to make the light source unit 6 movable. The effect is that it is movable.

In the embodiment of the present invention, the power source unit 2 does not have to have a flat box shape as shown in FIG. 1, and the length Y may be formed to be equal to or less than the width of the side plate portion 12. In that case, the airflow on the back side of the radiator 4 is not obstructed, and higher heat dissipation can be expected.

In addition, the length X of the power supply unit 2 in the embodiment of the present invention may be shorter than the distance between the pair of side plate portions 12 and 12. In that case, the airflow on the back side of the radiator 4 is not obstructed, and higher heat dissipation can be expected.

As shown in FIG. 4, in another embodiment, the power supply unit 2 is formed with a front surface as an inclined surface whose height decreases toward the outer side in the width direction of the side plate portion 12. That is, in another embodiment shown in FIG. 4, when the radiator 4, the main body 5, and the light source unit 6 are slid along the long hole 123 on the front side of the power source unit 2, An inclination that hardly interferes with the trajectory is formed.

Although several embodiments of the present invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

1 ... arm
11 ... Mounting part
111 ... hole
12 ... Side plate
121… Power connection
122 ... fulcrum hole
123 ... Long hole
124 ... Narrow part
13 ... Bent part
2… Power supply
21 ... Main surface
22 ... Terminal
23… Control board
24 ... Cord hole
3 ... Connecting part
31… Rear side communication hole
32… Front side communication hole
4… Heat radiator
5 ... Body
6 ... Light source
7 ... Reflecting part
8 ... Cover part

Claims (4)

A light source unit;
A main body to which the light source unit is attached on the front side;
It has an attachment part and a pair of side plate parts, and is supported and connected so that the main body can be swung.
An arm to which the mounting portion is fixed to the ceiling;
Provided connected to the back side of the main body and between the pair of side plate parts,
A power supply unit formed such that the length in the width direction of the side plate part is shorter than the length in the direction between the pair of side plate parts;
A lighting fixture having. The lighting apparatus according to claim 1, wherein the power supply unit is fixed to the arm. The lighting fixture in any one of Claim 1 or 2 which has a heat radiator provided with the some metal plate provided in parallel so that it may protrude in the said main body back side. The lighting device according to any one of claims 1 to 3, wherein the power supply unit has a front surface formed as an inclined surface whose height decreases toward the outside in the width direction of the side plate portion.

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