JP6955618B2 - Lighting device - Google Patents

Description

The present invention relates to a lighting device, and more particularly to a lighting device using an LED (Light Emitting Diode).

In recent years, LEDs (Light Emitting Diodes) for lighting fixtures have been used in order to save energy and extend the service life in lighting fixtures installed in poor temperature environments such as in urban areas and in caves in urban areas. It is planned.

As a lighting fixture using an LED, a lighting device in which a light source using an LED is housed in a tubular body is known (see, for example, Patent Document 1 and Patent Document 2).

Further, as the light source is changed to LED, it is important to take measures against heat generation of LED, which is an electronic component, and its power supply module.

In the lighting device of Patent Document 1, the light source unit is housed in a cylindrical glove with both ends open, and each of the both end edges of the glove is inserted into a closing member to close the light source unit. In this lighting device, the support for screwing the substrate holder that holds the power supply substrate is formed of a high thermal conductive material such as aluminum to serve as a heat sink that absorbs the heat generated by the LED, and absorbs the heat generated by the LED. The heat is conducted to the closing member.

Further, in the LED lighting lamp of Patent Document 2, the press-processed heat radiating plate is brought into close contact with the inner surface of the lamp shade so that the generated heat is discharged to the outside through the lamp shade.

As described above, in the conventional lighting fixtures using LEDs, it is common to dissipate heat generated by the light source from the entire case through the lamp shade surrounding the light source and the side end faces.

Japanese Unexamined Patent Publication No. 2013-51193 Japanese Unexamined Patent Publication No. 2012-43558

However, in recent years, the lighting fixtures installed in the cave have been further miniaturized, and in the lighting fixtures to be miniaturized by using LEDs, the LEDs and the lighting fixtures are reduced in order to prevent the luminous efficiency of the LEDs from being lowered due to high temperature. There was a need for a structure that could handle the high heat generation of the power supply.

An object of the present invention is to provide a lighting device that can be miniaturized even in a cave, efficiently dissipates heat, and can be used stably for a long time.

The lighting device of the present invention
In a lighting device having a housing formed by accommodating a light emitting portion in a translucent tubular portion and closing both ends of the translucent tubular portion with closed portions.
The housing includes a partition plate for partitioning the inside of the housing, so that a light emitting region for accommodating at least the light emitting portion formed on one side of the partition plate and the light emitting region on the other side of the partition plate are provided. anda spatial region that will be formed adjacent to,
The partition plate has thermal conductivity and is arranged by being fitted inside the inner peripheral portion on one side of the opening end connection portion made of a hard material of the closing portion, which is joined to the translucent cylinder portion. Being done
The translucent cylinder portion is arranged so as to be fitted inside the inner peripheral portion on the other side of the opening end connection portion.
Lighting device.

According to the present invention, it is possible to reduce the size even in a cave, efficiently dissipate heat, and to use it stably for a long time.

It is a right side view of the lighting apparatus which concerns on embodiment of this invention. It is a top view of the lighting apparatus which concerns on embodiment of this invention. It is a rear view which shows the base end part of the lighting apparatus which concerns on embodiment of this invention. It is a front view which shows the tip part of the lighting apparatus which concerns on embodiment of this invention. FIG. 3 is a cross-sectional view taken along the line BB of FIG. It is a figure which shows the state which the cap part was removed at the base end side of the lighting apparatus which concerns on embodiment of this invention. FIG. 1 is a cross-sectional view taken along the line AA of FIG. It is a perspective view which shows the light source unit of the lighting apparatus which concerns on embodiment of this invention. It is a figure which provides for the explanation of the internal temperature distribution of the lighting apparatus which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the lighting device according to the present embodiment, the direction of leading out from the housing of the cable for emitting the light source in the housing will be described as the proximal end side. The direction indicating the base end and the expressions indicating the directions of other tips (front), left, right, etc. are not absolute ones used to explain the configuration and operation of each part of the lighting device 1. It is relative. That is, it is appropriate when each part of the lighting device 1 has the posture shown in the figure, but when the posture changes, it should be changed and interpreted according to the change in the posture.

The lighting device 1 shown in FIGS. 1 to 7 emits light by electric power supplied from the outside via the cable 2. The lighting device 1 is used, for example, by connecting a mold receptacle at the end of the cable 2 to a branch portion in which a main cable laid along the extending direction of the cable tunnel is branched at predetermined intervals in the cable tunnel. .. The cable 2 is watertightly connected to the branch portion by the mold receptacle 2a.

The lighting device 1 includes a light source 60 and a power supply module 30 for driving the light source 60, and is provided adjacent to a light emitting chamber (light emitting region) 1a having translucency and a light emitting chamber 1a, and is provided in the light emitting chamber 1a. It has closed chambers (adjacent space regions) 1b and 1c at room temperature different from the temperature. The closed chambers 1b and 1c are adjacent to the light emitting chamber 1a in the axial direction of the light transmitting cylinder portion 11, that is, in the axial direction of the light emitting chamber 1a.

In the lighting device 1 of the present embodiment, the inside of the hollow housing 10 is divided into a plurality of spatial regions of a light emitting chamber 1a and a closed chamber 1b and 1c. In the lighting device 1, the temperature of the light emitting chamber 1a is prevented from becoming high by the closed chambers 1b and 1c having a temperature difference with respect to the light emitting chamber 1a. In the present embodiment, the room temperature of the closed chambers 1b and 1c is lower than the room temperature of the light emitting chamber 1a. Further, the lighting device 1 is a immersion-proof type and satisfies, for example, JIS C 0920 IPX7. A closed chamber may be provided adjacent to the closed chambers 1b and 1c. A configuration may be configured in which two or more closed chambers are provided with the light emitting chamber 1a sandwiched in the axial direction of the light transmitting cylinder portion 11. In that case, the room temperature of the closed chamber becomes lower as the distance from the light emitting chamber 1a increases.

A specific configuration will be described.

The housing 10 of the lighting device 1 accommodates the light source 60 and the power supply module 30, and has a tubular translucent tubular portion 11 having translucency and closing portions 12a and 12b that close both ends of the translucent tubular portion 11. And have. In the present embodiment, the closing portions 12a and 12b have open end connecting portions 13 and 15 and cap portions 14 and 16. By attaching the cap portions 14 and 16 to the translucent cylinder portion 11 via the opening end portion connecting portions 13 and 15, the translucent cylinder portion 11 and the housing 10 itself are completely sealed.

The power supply module 30 is connected to the cable 2 and the light source 60, and when power is supplied via the cable 2, the light source 60 is driven to emit light.

The power supply module 30 may be configured in any way as long as it emits light from a light source. In the present embodiment, it is a DC power supply device that supplies DC to the LED to emit light.

The power supply module 30 is fixed to the power supply mounting portion of the chassis 40 so that the heat generated during driving is conducted through the power supply mounting portion. In the present embodiment, for example, it is fastened by a fastening member 32 such as a screw shown in FIG.

The light source 60, together with the power supply module 30, constitutes a light emitting portion housed in the translucent cylinder portion 11.
The light source 60 is an LED in the present embodiment, and consumes less power than, for example, an incandescent lamp or a glow starter type or rapid start type fluorescent lamp.

The light source 60 has a plurality of LEDs and is fixed to the chassis 40 together with the power supply module 30.

The chassis 40 is a long one extending in the longitudinal direction, and in the present embodiment, the chassis 40 is formed so as to extend in the axial direction of the translucent cylinder portion 11 by a heat conductive member that conducts heat. .. The chassis 40 is made of aluminum in this embodiment.

The chassis 40 has a power supply mounting portion (first horizontal portion 45) to which the power supply module 30 is mounted, and a light source mounting portion (second horizontal portion 48) to which the light source 60 is mounted.

The chassis 40 is provided with a power supply mounting portion and a light source mounting portion so as to be located at positions separated from each other. In the present embodiment, the chassis 40 has a ridge portion 44 processed so that the center of a long plate having thermal conductivity is convex, and a lower end portion of the ridge portion 44, as shown in FIG. It has a second horizontal portion 48 provided in the vehicle.

The ridge portion 44 is formed in an inverted U-shape in cross section by a first horizontal portion 45 forming an upper surface portion that is a horizontal plane and both side portions 46 that incline downward from both sides of the first horizontal portion 45. There is.

The power supply module 30 is fixed to the surface side of the first horizontal portion 45.

Further, the chassis 40 extends horizontally from the lower ends of both side portions 46 that are inclined downward from both sides of the first horizontal portion 45 of the ridge portion 44, and is horizontally different in height position from the first horizontal portion 45. The extending second horizontal portion 48 is configured as a light source mounting portion. The second horizontal portion 48 extends horizontally and parallelly, and each lower surface functions as a light source mounting portion, and a plurality of LEDs, which are light sources 60, are linearly mounted on each lower surface at predetermined intervals. ing.

In the present embodiment, the light sources 60 are arranged side by side so as to irradiate the horizontal lower surface downward along the longitudinal direction.

As a result, the plurality of light sources 60 attached to the chassis 40 and the power supply module 30 are arranged apart from each other in the vertical direction and at positions shifted in the horizontal direction.

Further, the chassis 40 has a first horizontal portion 45, both side portions 46, and a second horizontal portion 48 that are bent and joined to each other. As a result, as compared with the case where the chassis 40 is a long flat plate-shaped member, the surface area within the area in a plan view can be increased, the heat conduction amount can be increased, and the heat dissipation amount can be increased.

Heat dissipation partition plates 52 and 54 are joined to both ends of the chassis 40. In the present embodiment, connecting plates 56 having contact surfaces orthogonal to the extending direction of the chassis 40 and having thermal conductivity are fixed to both ends of the chassis 40. The chassis 40 is joined to the heat radiating partition plates 52 and 54 via the connecting plate 56 in a state of surface contact. The chassis 40 and the connecting plate 56 are joined via a heat conductive joining means or joining member such as welding or fastening with screws or the like.

The heat radiating partition plates 52 and 54 are a closed chamber (spatial area) adjacent to the light emitting chamber 1a accommodating the power supply module 30 and the light source 60 in the lighting device 1 in the axial direction of the light transmitting cylinder portion 11 with respect to the light emitting chamber 1a. It is divided into 1b and 1c.

The heat radiating partition plates 52 and 54 are composed of heat conductive members that conduct heat.

In the present embodiment, the heat radiating partition plates 52 and 54 are disk-shaped members made of alumite-treated aluminum. The heat radiating partition plates 52 and 54 are not limited to the disk-shaped members, but are not limited to the disk-shaped members, but are the light emitting chamber 1a accommodating the power supply module 30 and the light source 60 in the lighting device 1, and the axial direction of the light transmitting cylinder portion 11 with respect to the light emitting chamber 1a. Any method may be formed as long as it is divided into the adjacent closed portions (spatial regions) 1b and 1c. For example, the heat radiating partition plates 52 and 54 have a rectangular, elliptical, and polygonal heat radiating plate to which the end portion of the chassis 40 is attached, and an opening closed from the radiating plate, and the opening end portion. It may be composed of a disk-shaped frame that can be fitted into the connecting portions 13 and 15.

The heat radiating partition plates 52 and 54 are arranged so as to face each other with the chassis 40 interposed therebetween, and are provided on their respective central axes so as to be orthogonal to the chassis 40.

The heat radiation partition plate 52 has an insertion hole (not shown). A connection cable connected to the power supply module 30 is inserted into the insertion hole of the heat radiation partition plate 52, and the connection cable is connected to the cable 2. The connection cable may be the same cable as the cable 2.

The heat radiating partition plates 52 and 54 are arranged in the vicinity of both ends of the translucent cylinder portion 11, and in the present embodiment, they are joined to the one-end side openings 132 and 152 of the opening end connecting portions 13 and 15 to be transparent. A light emitting chamber 1a is formed together with the light cylinder portion 11 and the one-end side portions of the opening end portion connecting portions 13 and 15, respectively.
The heat radiating partition plates 52 and 54 are arranged so as to be intimately fitted to the inner circumferences of the opening end connection portions 13 and 15, that is, the inner circumferences of the housing 10. The heat radiating partition plates 52 and 54 are fixed so as to airtightly close the inner diameters of the opening end connecting portions 13 and 15.

In the present embodiment, the heat radiation partition plates 52 and 54 form the light source unit 20 together with the power supply module 30, the chassis 40, and the light source 60, and in the present embodiment, the connection plate 56. The light source unit 20 can form a light emitting chamber 1a partitioned by the heat radiating partition plates 52 and 54 simply by inserting the light source unit 20 into the light transmitting tube portion 11 to which the opening end connecting portions 13 and 15 are attached.

The translucent cylinder portion 11 is a tubular body formed of a material that transmits light, for example, glass or resin having translucency. In the present embodiment, the translucent tubular portion 11 is a tubular body made of polycarbonate.

The opening end connecting portions 13 and 15 are formed in a cylindrical shape, and are joined to each of both end portions of the translucent tubular portion 11 in a state where the inside is communicated with each other. Caps 14 and 16 are attached to the opening ends of the opening end connecting portions 13 and 15 on the opposite side of the opening end to which the translucent cylinder portion 11 is joined, and the opening ends on the opposite side are closed. NS. The opening end connection portions 13 and 15 close both ends of the translucent cylinder portion 11 together with the cap portions 14 and 16 in a sealed state.

The opening end connecting portions 13 and 15 form closed chambers 1b and 1c axially adjacent to the light emitting chamber 1a, and in the present embodiment, have a predetermined length in the axial direction.

The opening end connection portions 13 and 15 are internally fitted so that the heat radiation partition plates 52 and 54 are sealed at the intermediate portion in the axial direction.

The other end side openings 134 and 154 that open on the other end side in the axial direction of the opening end portion connecting portions 13 and 15 are sealed by fitting the cap portions 14 and 16, respectively.

In the present embodiment, the cap portions 14 and 16 are closed together with the opening end connecting portions 13 and 15 as the closing portions 12a and 12b to close and seal the translucent cylinder portion 11. The cap portions 14 and 16 are preferably formed of a material having thermal conductivity, and are formed of, for example, a resin. In the present embodiment, the cap portions 14 and 16 are formed of ABS resin together with the opening end portion connecting portions 13 and 15. It should be noted that the configuration may be such that both the opening ends are closed to both opening ends of the translucent cylinder portion 11 without going through the opening end connecting portions 13 and 15.

An insertion portion 3 into which the cable 2 is inserted is attached to the cap portion 14 on the base end portion side. The cable 2 is airtightly inserted through the insertion portion 3. That is, although the cable 2 is inserted through the housing 10, the inside of the housing 10 is sealed.

The opening end connection portions 13 and 15 have a hanging arm 19 for fixing to a fixing plate 18 for fixing the lighting device 1 at the installation location.

The hanging arm 19 is provided so as to project from a part of the outer periphery of the opening end connecting portions 13 and 15 in a direction orthogonal to the axial direction. When the fixing plate 18 is fixed to the ceiling surface of the cable tunnel, the lighting device 1 is held in a state of being suspended from the ceiling surface via the hanging arm 19.

In the lighting device 1, electric power is supplied to the power supply module 30 to cause the light source 60 to emit light. When the light source 60 emits light, the power supply module 30 and the LED that is the light source 60 generate heat, and this heat is transmitted to both ends through the chassis 40 and conducted to the heat dissipation partition plates 52 and 54.

The heat conducted to the heat radiating partition plates 52, 54 passes through the entire disk-shaped surface of the heat radiating partition plates 52, 54, and is a closed chamber 1b at room temperature, which is lower than the temperature in the light emitting chamber 1a accommodating the power supply module 30 and the light source 60. Heat is dissipated within 1c. The heat accumulated in the closed chambers 1b and 1c is dissipated to the outside air having a temperature lower than the room temperature of the closed chambers 1b and 1c through the materials of the cap portions 14 and 16, specifically the cap portions 14 and 16. NS.

FIG. 9 is a diagram for explaining the internal temperature distribution of the lighting device 1 according to the embodiment of the present invention. In FIG. 9, the internal temperature distribution of the lighting device 1 is shown by a temperature gradient corresponding to each room inside the lighting device 1.

As shown in FIG. 9, the temperature distribution of the light emitting chamber 1a and the closed chambers 1b and 1c when the light source 60 in the lighting device 1 is driven has the highest temperature in the translucent cylinder portion 11, and is located at both ends of the translucent cylinder portion 11. The temperature inside the opening end connecting portions 13 and 15 and the cap portions 14 and 16 is lower than the temperature inside the translucent cylinder portion 11. Further, the outside air becomes lower than the temperature inside the opening end connecting portions 13 and 15 and the cap portions 14 and 16, that is, the temperature inside the closed chambers 1b and 1c.

In particular, since the light source 60 emits light from the power supply module 30, the heat generated by both the power supply module 30 and the light source 60 may increase the temperature in the light emitting chamber 1a in which both are arranged.

However, in the present embodiment, even if the light source 60 is a heat-sensitive LED, the light emitting chamber 1a is partitioned from the closed chambers 1b and 1c, so that the temperature inside the light emitting chamber 1a can be prevented from rising. The room temperature of the light emitting chamber 1a in the cable tunnel can be set to a predetermined temperature or less (for example, the temperature inside the light emitting chamber 1a in the outside air 40 [° C.] is 60 [° C.] or less).

As a result, even an LED that emits light from the power supply module 30 using the power supply module 30 can be stably emitted and used in the cave.

The lighting device 1 of the present embodiment is formed by accommodating the power supply module 30 in the translucent tubular portion 11 and closing both ends of the translucent tubular portion 11 with the closing portions 12a and 12b. It has a housing 10. The housing 10 includes a heat radiating partition plate 52 (54) that partitions the inside of the housing 10. As a result, the housing 10 is formed on one side of the heat radiating partition plate 52 (54) and at least on the light emitting region (light emitting chamber 1a) accommodating the power supply module 30 and on the other side of the heat radiating partition plate 52 (54). The light emitting region 1a is divided into a space region (closed chamber 1b, 1c) adjacent to the light emitting region 1a in the axial direction. As described above, in the lighting device 1 of the present embodiment, by partitioning the hollow housing 10 into a plurality of space regions, a temperature difference is generated from the space of the heat generating source, and the heat flow is generated by this temperature difference to efficiently perform the outside. Can dissipate heat to.
According to the lighting device 1, the size can be reduced, heat can be dissipated efficiently, and the lighting device 1 can be used stably for a long time.

The embodiments of the present invention have been described above. The above description is an example of a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto. That is, the description of the configuration of the device and the shape of each part is an example, and it is clear that various changes and additions to these examples are possible within the scope of the present invention.

The lighting device according to the present invention can be miniaturized, has the effect of efficiently dissipating heat and can be used stably for a long time, and is useful as a lighting device installed in a cave.

1 Lighting device 1a Light emitting room (light emitting area)
1b, 1c Blocked chamber (spatial area)
2 Cable 10 Housing 11 Translucent tube (cylinder)
12a, 12b Blocking part 13,15 Open end connecting part 14, 16 Cap part 18 Fixing plate 19 Hanging arm 20 Light source unit 30 Power supply module (light emitting part)
40 Chassis 44 Protruding part 45 1st horizontal part 46 Both sides 48 2nd horizontal part 52, 54 Heat dissipation partition plate (partition plate)
56 Connection plate 60 Light source (light emitting part)

Claims (3)

In a lighting device having a housing formed by accommodating a light emitting portion in a translucent tubular portion and closing both ends of the translucent tubular portion with closed portions.
The housing includes a partition plate for partitioning the inside of the housing, so that a light emitting region for accommodating at least the light emitting portion formed on one side of the partition plate and the light emitting region on the other side of the partition plate are provided. anda spatial region which is formed adjacent to,
The partition plate has thermal conductivity and is arranged by being fitted inside the inner peripheral portion on one side of the opening end connection portion made of a hard material of the closing portion, which is joined to the translucent cylinder portion. Being done
The translucent cylinder portion is arranged so as to be fitted inside the inner peripheral portion on the other side of the opening end connection portion.
Lighting device. The opening end connection portion is made of ABS resin.
The lighting device according to claim 1. It has a chassis in which both ends separated in the longitudinal direction are connected to each other in contact with the pair of the partition plates.
The chassis is
Top surface and
Both sides that descend from both sides of the upper surface and
It integrally has a lower surface portion provided on both sides from the lower end of the both side portions.
The power supply of the light emitting portion is arranged on the upper surface portion, and the light emitting portion is arranged on the lower surface portion.
The lighting device according to claim 1 or 2.

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