JP2023134081A - Illuminating tool and illuminating device comprising illuminating tool - Google Patents

Abstract

To provide an illuminating tool that can effectively restrain a rise in temperature even if the amount of light is increased, and an illuminating device comprising the same.SOLUTION: A light source part 31 for applying light outward is provided on a side wall part 2b of a case 2. A plurality of heat dissipation fins 6 having a long plate-like shape in the axial direction of the case are provided on an inner surface of the side wall part 2b at a position corresponding to the light source part 31 and radially protruded toward the inside of the case 2. An air intake port 41 for introducing gas to the inside from the outside is provided in a wall part of the case 2 closer to the side of a tip than the light source part 31. An air exhaust port 42 for discharging gas to the outside from the inside is provided in the wall part of the case 2 closer to the side of a base end than the light source part 31. An electric fan 5 for making gas flow toward the air exhaust port 42 from the air intake port 41 is provided inside the case 2.SELECTED DRAWING: Figure 1

Description

The present invention relates to a lighting fixture in which a light source unit that emits light outward is provided on a side wall of a housing, and a lighting device equipped with the same.

2. Description of the Related Art In recent years, various lighting fixtures having light source sections made of LED elements have been provided for illumination or decoration purposes. These lighting devices include a light source section in which a plurality of LED elements are surface-mounted on the front end side of a housing, and a translucent cover that covers the light source section. Since LED elements have the disadvantage that when the temperature rises to 90°C or higher, the light output decreases and the life span is shortened, it is said that it is preferable to suppress the temperature to 50°C or lower. Therefore, in conventional lighting fixtures, heat dissipation fins for absorbing and releasing heat generated from the LED elements of the light source section are provided on the surface of the light source support stand opposite to the light source section (for example, Patent Document 1 reference).

By the way, when providing a lighting fixture that increases the amount of light and can irradiate over a wide angle by providing many light sources on the side wall of the housing, the amount of heat generated also increases and there is a risk of deterioration of the elements. As a cooling structure for such a lighting device, the present applicant has already proposed a structure in which a plurality of cylindrical bodies through which outside air circulates are provided along the circumferential direction, and a light source is attached to the outer peripheral surface of each cylindrical body ( (See Patent Document 2). However, although the surroundings of these cylindrical bodies are cooled, heat tends to be trapped between the cylindrical bodies, particularly in the center of the housing, and there is a certain limit to the cooling performance.

Japanese Patent Application Publication No. 2011-108590 Japanese Patent Application Publication No. 2014-99397

SUMMARY OF THE INVENTION In view of the above-mentioned situation, an object of the present invention is to provide a lighting device that can effectively suppress a temperature rise even when the amount of light is increased, and a lighting device equipped with the lighting device.

That is, the present invention includes the following inventions.
(1) A light source section that emits light outward is provided on the side wall of the casing, and a plate-shaped plate that is long in the axial direction of the casing is provided on the inner surface of the side wall at a position corresponding to the light source section. A plurality of heat dissipation fins are provided to protrude radially toward the inside of the housing, and an intake port for taking in gas from the outside to the inside is provided on a wall portion of the housing on the distal side of the light source portion, and An exhaust port for discharging gas from the inside to the outside is provided on a wall portion closer to the proximal end than the light source, and an electric fan is provided inside the casing to flow the gas from the intake port to the exhaust port. Lighting equipment provided.

(2) The side wall portion of the housing is configured by arranging a plurality of plate-shaped portions with good heat conductivity that are long in the axial direction of the housing and arranged along the circumferential direction of the housing, and the outer surface of the plate-shaped portion is The lighting device according to (1), wherein the light source section is attached to a side thereof, and the radiation fin is provided on an inner surface side of the plate-shaped section.

(3) A plate-shaped base portion fixed to the inner surface side of the plate-shaped portion, and a bent piece extending inward from the housing from one or both ends of the base portion in the circumferential direction. The lighting fixture according to (1) or (2), further comprising a radiation fin body in which the bent piece is the radiation fin.

(4) The electric fan is a blower-type electric fan that takes in gas from an intake port in the axial direction and exhausts it radially outward, and the intake port is placed inside the housing at a position corresponding to the exhaust port inside the housing. The lighting device according to any one of (1) to (3), which is provided coaxially with the casing with the distal end of the body facing.

(5) The air intake ports are arranged at intervals along the circumferential direction at corresponding positions facing the end side of the radiating fin on the casing distal end side in an outer area excluding a predetermined center area of the casing's distal end wall. The lighting equipment described in any one of (1) to (4), which is installed multiple times at different times.

(6) The lighting device according to (5), wherein a second light source unit that irradiates light outward is provided in the central region of the tip wall.

(7) The lighting device according to any one of (1) to (6), including a cylindrical translucent cover that covers a side wall of a casing that includes the light source section.

(8) The lighting device according to any one of (1) to (7), a socket portion to which the lighting device is electrically connected, and a socket portion provided on the tip side of the socket portion so as to surround the lighting device; A lighting device comprising a reflective umbrella with good heat conductivity and a reflective surface on its side surface, and a light-transmitting cover attached to the opening at the tip of the reflective umbrella, the lighting device being hermetically covered by the reflective umbrella and the cover. .

According to the present invention, the heat generated by the light source provided on the side wall of the housing is absorbed by the radiation fins and guided inside the housing where the radiation fins extend, and in the process, the electric fan Heat is efficiently radiated from the heat radiation fins into the gas taken in from the intake port and flowing to the exhaust port on the proximal end side, and is discharged together with the gas to the outside of the housing. Therefore, it is possible to prevent heat from accumulating in the center of the casing, effectively suppressing temperature rise.

Here, the side wall portion of the casing is configured by arranging a plurality of plate-like portions with good thermal conductivity that are long in the axial direction of the casing along the circumferential direction of the casing, and the outer surface of the plate-like portion In the case where the light source part is attached to the plate part and the radiation fin is provided on the inner surface of the plate part, the side wall part of the casing can be constructed of the minimum necessary material by the plate part supporting the light source part. In addition, since the heat of the light source part that the plate-like part receives can be efficiently exhausted as described above, the amount of light can be increased while significantly reducing the overall weight.

The plate-shaped base portion is fixed to the inner surface of the plate-shaped portion, and a bent piece extends inward from the circumferential direction of the base portion. In the case where a heat dissipating fin body in which the bent piece is the heat dissipating fin is provided, a plate-like member having such a base portion and a bent piece can be easily realized by pressing a plate material, and can be manufactured efficiently. can.

In addition, as an electric fan, a blower-type electric fan that takes in gas in the axial direction from the intake port and exhausts it radially outward is installed with the intake port located on the tip side of the housing at a position corresponding to the exhaust port inside the housing. If it is provided coaxially with the casing so as to face the casing, it is possible to realize efficient gas flow within the casing.

In addition, a plurality of intake ports are arranged at intervals along the circumferential direction at corresponding positions facing the end side of the radiating fin on the casing distal end side in an outer area excluding a predetermined center area of the casing's distal end wall. In the case where the heat dissipation fins are opened, the taken in gas can be efficiently guided between the edges and between the heat dissipation fins, and the heat from the heat dissipation fins can be efficiently radiated.

In addition, if a second light source unit that emits light outward is provided in the center area of the tip wall, it is possible to irradiate light not only around the periphery but also in the direction of the tip, ensuring uniform irradiation in all directions. We can provide lighting equipment that allows

In addition, with a cylindrical translucent cover that covers the side wall of the casing containing the light source, the light source can be protected and, as mentioned above, the generated heat can be dissipated through the inner heat dissipation fins. Heat can be dissipated into the gas flowing inside, preventing heat buildup.

Further, the lighting device according to the present invention includes a socket portion to which the lighting device is electrically connected, and a socket portion provided on a distal end side of the socket portion so as to surround the lighting device, and having a reflective surface on an inner surface and having good thermal conductivity. In a lighting device comprising a transparent reflective umbrella and a light-transmitting cover attached to an opening at the tip of the reflective umbrella, the lighting device is hermetically covered by the reflective umbrella and the cover. Even in a sealed state, the hot gas emitted from the exhaust port of the lighting device will move along the inner surface of the reflector, which has good thermal conductivity, toward the tip of the cover, and in the process, it will be reflected. The umbrella absorbs heat from the gas and releases the heat to the outside of the reflective umbrella.

The cooled gas that has had its heat removed hits the cover and flows toward the tip of the lighting fixture, is taken into the interior of the lighting fixture's casing from the lighting fixture's intake port, and is then passed through the radiating fins inside the lighting fixture to the light source section. The heat is received and exhausted again through the exhaust port of the lighting fixture, and guided to the inner surface of the reflective umbrella. By repeating this process, the heat generated in the light source of the lighting device is efficiently transferred to the reflective umbrella through the gas, and is radiated to the outside of the lighting device. Therefore, even though the lighting device is in a sealed state and protected from the external environment, heat can be prevented from being trapped inside the lighting device, and deterioration of the light source portion of the lighting device can be prevented.

1 is a vertical cross-sectional view showing a typical embodiment of a lighting device according to the present invention. FIG. 2 is a side view showing a typical embodiment of a lighting fixture used in the lighting device. FIG. 6 is an exploded perspective view showing the cover separated from the casing side of the lighting fixture. Similarly, a plan view of the lighting device seen from the tip side. AA sectional view of FIG. 2. Similarly, an exploded perspective view of the housing side of the lighting fixture. FIG. 3 is an exploded perspective view of a plate-shaped portion, a light source portion, and a heat dissipation fin separated from the case side of the lighting fixture. FIG. 6 is an explanatory diagram showing the flow state of air in the lighting device.

Hereinafter, embodiments according to the present invention will be described based on the drawings.

As shown in the longitudinal cross-sectional view of FIG. 1, the lighting device 1 according to the present invention includes a lighting fixture 10 according to the present invention, a socket portion 11 to which the lighting fixture 10 is electrically connected, and a distal end side of the socket portion 11. It is provided so as to surround the lighting device 10 and includes a reflective umbrella 12 having good thermal conductivity and having a reflective surface 120 on the inner surface, and a translucent cover 13 attached to the opening at the tip of the reflective umbrella 12. The lighting fixture 10 is hermetically covered by a reflector 12 and a cover 13. In this way, the lighting device 1 covers the lighting fixture 10 in a sealed state to protect it from the external environment, prevents heat generated by the light source section 31 from trapping inside the lighting fixture 10, and protects the lighting fixture 10 from the heat generated by the light source section 31. It is characterized by its ability to prevent deterioration.

The reflective umbrella 12 is composed of a base umbrella 121 fixed to the socket part 11 and a reflective umbrella 122 detachably attached to the tip side of the base umbrella 121 and having the reflective surface 120 formed on its inner surface. It is fixed to the tip edge of the reflective umbrella 122. By removing the reflective umbrella 122 from the base umbrella 121, the lighting fixture 10 can be replaced.

As shown in FIGS. 2 to 6, the lighting fixture 10 is provided with a light source 31 on the side wall 2b of the housing 2, which emits light outward. The light source section 31 is exemplified as one made of an LED element, but is not limited to this, and may be a conventional lighting device such as a fluorescent lamp, a halogen lamp made of a filament, or a high-intensity discharge lamp (high-pressure sodium lamp, metal halide lamp, mercury lamp). A wide variety of known light sources can be used as the light source of the device.

On the inner surface of the side wall portion 2b at a position corresponding to the light source portion 31, a plurality of plate-shaped heat dissipation fins 6, which are long in the axial direction of the housing 2, are provided to protrude radially toward the inside of the housing 2. More specifically, the casing 2 includes a case body 20 on the proximal side, which is provided with a cap 201 at the proximal end and contains necessary parts 111 such as a power supply circuit inside, and a distal frame 21 provided at the distal end. , a plurality of plate-shaped parts 22 having good thermal conductivity and long in the axial direction connect the case body 20 and the tip frame 21. A translucent cover 7 is attached to the outside of the plate portion 21 and the plurality of plate portions 22 .

In this way, each plate-shaped part 22 constitutes the side wall part 2b of the housing 2, and the radiation fins 6 are attached to the inner surface of each plate-shaped part 22, and the radiation fins 6 are attached to the outer surface of each plate-shaped part 22. The light source section 31 is attached. Therefore, the side wall portion 2b of the casing 2 can be constructed using the minimum necessary material by the plate portion 22 that supports the light source portion 31, and the heat of the light source portion 31 received by the plate portion 22 can be efficiently exhausted. Therefore, the amount of light can be increased while significantly reducing the overall weight.

The plate portion 22 is made of a metal plate having a constant width and made of a relatively lightweight and highly thermally conductive metal such as copper or aluminum, and as shown in FIGS. 6 and 7, The end 31a on the distal end side is fixed to the support piece 21c on the outer periphery of the distal end frame 21 by riveting, screwing, caulking, welding, or the like. The proximal end 22b of the plate-shaped portion 22 is fixed to the distal end of the case body 20 by riveting, screwing, caulking, welding, or the like. Although the fixing is performed with the radiation fin body 62 and the light source section 31 attached, the light source section 31 can also be attached after being fixed. The adjacent plate portions 22 are arranged at a certain distance from each other in the circumferential direction.

The radiation fin 6 includes a plate-shaped base portion 60 fixed to the inner surface side of the plate-shaped portion 22, and a circumferential direction of the base portion 60 from the position of one or both (in this example, both) ends of the base portion 60 to the inside of the casing. Each bent piece 61 of a heat dissipating fin body 62 has a substantially U-shaped cross section and has bent pieces 61, 61 extending in a bent manner. By fixing the base portion 60 to the inner surface of the plate-shaped portion 22 by means such as screwing, adhesion, caulking, or eyelet processing, the bent pieces 61, 61 as the heat dissipation fins 6 are spaced apart from each other at a constant distance from the center. Projects in the axial direction.

The material of the radiation fin body 62 is not particularly limited as long as it has good thermal conductivity, but it is preferable to use a relatively lightweight metal plate made of copper, aluminum, or the like. The heat dissipation fin body 62 having such a heat dissipation fin 6 can be easily realized by pressing a plate material, and can be manufactured efficiently.

The light source section 31 includes a substrate module 310 and a light source 311 which is a plurality of LED elements attached to the outer surface of the substrate module 310, and the substrate module 310 is fixed to the surface of the plate-like section 22 by screws or the like.

As shown in FIGS. 3 and 4, the wall of the housing 2 on the distal side of the light source section 31 is provided with an inlet port 41 for taking in gas from the outside. The wall portion is provided with an exhaust port 42 for discharging gas from the inside to the outside. Furthermore, an electric fan 5 that flows gas from the intake port 41 toward the exhaust port 42 is provided at a suitable location inside the housing 2 .

Heat generated by the light source section 31 provided on the side wall section 2b of the housing 2 is absorbed by the heat radiation fins 6 and guided into the inside of the housing 2 where the radiation fins 6 extend, and in the process, the electric fan Heat is efficiently radiated from the radiation fins 6 into the gas taken in from the intake port 41 by the heat sink 5 and flowing to the exhaust port 42 on the proximal end side, and is discharged to the outside of the housing 2 together with the gas. This prevents heat from accumulating in the center of the housing 2, effectively suppressing temperature rise.

Specifically, the intake port 41 is located at the edge of the radiating fin 6 (bent piece 61) on the casing tip side in the outer region excluding the predetermined center region R1 of the tip frame 21 forming the tip wall of the casing 2. It is constituted by a plurality of openings 410 opened at intervals along the circumferential direction at corresponding positions facing 6a. In this way, air is supplied to the position facing the end side 6a, the gas taken in between the radiation fins 6 is guided, and the heat from the radiation fins 6 can be efficiently released.

A second light source section 32 that emits light outward (toward the tip end) is provided in the central region R1. Like the light source section 31, the second light source section 32 includes a substrate module 320 and a light source 321, which is a plurality of LED elements attached to the outer surface of the substrate module 320. It is fixed with screws or other means.

By providing the second light source section 32 at the tip in this way, it is possible to irradiate light not only to the surrounding area but also to the tip direction, and it is possible to provide a lighting device that can uniformly irradiate light in all directions. A plurality of second heat radiation fins 63 for radiating heat from the light source part 32 are protruded from the inner surface (base end side surface) of the center region R1 of the tip frame 21 where the light source part 32 is provided.

An efficient electric fan 5 is a blower type electric fan that takes in gas from an intake port in the axial direction and exhausts it radially outward. As shown in FIGS. 1 and 2, such an electric fan 5 is connected to the housing 2 with the intake port facing the front end of the housing 2 at a position corresponding to the exhaust port 42 inside the housing 2. They are coaxially arranged.

The electric fan 5 has a built-in electric motor in its center that rotates the fan, and takes in gas in the axial direction and exhausts it to the outside.As a result, a powerful rotation is generated inside the housing toward the electric fan 5. Turbulence forms. In order to efficiently send air to the intake port of the electric fan 5, a conical airflow control plate that forms an airflow to send air to the intake port is attached to the tip side of the electric fan inside the housing. Good too.

The cover 7 protects the light source parts 31 and 32, and an opening 70 is provided at a position corresponding to the opening 410 of the tip frame 21, communicating with the inside and outside and forming the intake port 41 together with the opening 410. .

As shown in FIG. 8, in the lighting device 1 including the lighting device 10 according to the present invention, even if the lighting device 10 is in a sealed state, the hot gas emitted from the exhaust port 42 of the lighting device 10 can be removed. 91 moves along the inner surface 12b of the reflective umbrella 12, which has good thermal conductivity, toward the tip side where the cover 13 is located, and in the process, the reflective umbrella absorbs heat from the gas and transfers heat to the outside of the reflective umbrella 12. discharge.

Further, the cooled gas 90 from which heat has been removed hits the cover 13 and flows toward the tip side of the lighting fixture 10, and is taken into the interior of the casing 2 of the lighting fixture 10 from the air intake port 41 of the lighting fixture 10, and is returned to the lighting fixture 10. The heat of the light source section 31 is received from the heat dissipation fins 6 in the housing 2, and is again discharged from the exhaust port 42 of the lighting fixture 10, and guided to the inner surface 12b of the reflector 12. By repeating such a process, the heat generated in the light source section 31 of the lighting fixture 10 is efficiently transferred to the reflective umbrella 12 through the gases 90/91, and is radiated to the outside of the lighting device 1.

The reflective umbrella 12 is not particularly limited as long as it is made of a material with good thermal conductivity, but it is preferable to use a relatively lightweight metal plate made of copper, aluminum, or the like. The cover 13 is made of a translucent material such as polycarbonate.

1 Lighting device 2 Housing 2b Side wall portion 5 Electric fan 6 Radiation fin 6a End side 7 Cover 10 Lighting fixture 11 Socket portion 12 Reflector 12b Inner surface 13 Cover 20 Case body 21 Tip frame 21c Support piece 22 Plate portion 22b End portion 31 Light source part 31a End part 32 Light source part 41 Intake port 42 Exhaust port 60 Base part 61 Bent piece 62 Radiation fin body 63 Radiation fin 70 Opening 90, 91 Gas 111 Component 120 Reflection surface 121 Base umbrella 122 Reflection umbrella 201 Base 310 Board module 311 Light source 320 Substrate module 321 Light source 410 Aperture R1 Center region

Claims (8)

A light source unit that emits light outward is provided on the side wall of the housing.
A plurality of plate-shaped heat dissipation fins, which are long in the axial direction of the housing, are provided on the inner surface of the side wall at a position corresponding to the light source part, and protrude radially toward the inside of the housing,
An intake port for taking in gas from the outside to the inside is provided in a wall portion of the housing on a side closer to the tip than the light source portion,
An exhaust port for discharging gas from the inside to the outside is provided in a wall portion of the housing closer to the proximal end than the light source portion,
A lighting fixture, wherein an electric fan that flows gas from the intake port toward the exhaust port is provided inside the casing. The side wall portion of the housing is configured by arranging a plurality of plate-shaped portions with good thermal conductivity that are long in the axial direction of the housing and arranged along the circumferential direction of the housing,
The light source section is attached to the outer surface side of the plate-shaped section,
The lighting fixture according to claim 1, wherein the radiation fin is provided on the inner surface side of the plate-shaped portion. It has a plate-shaped base part fixed to the inner surface side of the plate-shaped part, and a bending piece that bends and extends inward from the casing from the position of one or both ends of the base part in the circumferential direction,
The lighting fixture according to claim 1 or 2, further comprising a radiation fin body in which the bent piece is the radiation fin. The electric fan is a blower-type electric fan that takes in gas from an intake port in the axial direction and exhausts it radially outward. The lighting device according to any one of claims 1 to 3, wherein the lighting device is provided coaxially with the housing with its side facing. A plurality of the intake ports are provided at intervals along the circumferential direction at corresponding positions facing the end side of the casing front end of the heat dissipation fin in an outer area excluding a predetermined center area on the front end wall of the casing. The lighting fixture according to any one of claims 1 to 4, which is opened. 6. The lighting device according to claim 5, wherein a second light source section that irradiates light outward is provided in the central region of the tip wall. The lighting device according to any one of claims 1 to 6, further comprising a cylindrical translucent cover that covers a side wall of a casing that includes the light source. The lighting device according to any one of claims 1 to 7,
a socket portion to which the lighting fixture is electrically connected;
a reflective umbrella with good thermal conductivity, which is provided on the tip side of the socket portion so as to surround the lighting device, and has a reflective surface on its inner surface;
and a translucent cover attached to the tip opening of the reflective umbrella,
A lighting device in which the lighting fixture is hermetically covered by the reflective umbrella and the cover.

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