WO2015045551A1

WO2015045551A1 - Lamp

Info

Publication number: WO2015045551A1
Application number: PCT/JP2014/068019
Authority: WO
Inventors: 篤史大野; 孝佳今成; 守幸関根
Original assignee: 岩崎電気株式会社
Priority date: 2013-09-25
Filing date: 2014-07-07
Publication date: 2015-04-02
Also published as: JP2015065032A; JP6244776B2

Abstract

The present invention makes it possible to maintain heat radiation properties and prevent electric shock in a lamp. A lamp is provided with a plurality of light source units (13) that comprise a mounting board (21) on the surface of a metal substrate having a substantially flat plate shape, said mounting board (21) having an LED (20) mounted thereto; and a support body (12) that comprises an insulating material and that supports the plurality of light source units (13). A heat-radiating fin (29) is provided to the rear surface of the substrate. The plurality of light source units (13) are attached so that one end section (13a) thereof surrounds and covers the support body (12) and arranged around the axis (C) of an LED lamp (1) so that the rear surface of each substrate faces inward. The lamp is additionally provided with a joining member that comprises an insulating material and that blocks an opening that is created by the other end sections (13b) of the plurality of light source units (13).

Description

lamp

The present invention relates to a lamp.

2. Description of the Related Art Conventionally, a lamp having a plurality of light source units each having a mounting substrate on which a light emitting element is mounted on the surface of a metal base, and the plurality of light source units are arranged around the axis of the lamp with the back surface of the base facing inward. Is known (see, for example, Patent Document 1). In the lamp of Patent Document 1, a heat radiating fin is provided on the back surface of the base.

JP 2013-122899 A

By the way, if the entire lamp is covered with a cover made of resin, glass, or the like with respect to a conventional lamp, contact between the user's or operator's hand or finger and the substrate is prevented, and electric shock is prevented. However, since heat is generated in the cover, the heat radiation performance by the heat radiation fins of the base body is deteriorated.
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a lamp capable of ensuring heat dissipation and preventing electric shock.

This specification includes all the contents of the Japanese Patent Application / Japanese Patent Application No. 2013-198280 filed on September 25, 2013.
In order to achieve the above object, the present invention includes a plurality of light source units each including a mounting substrate on which a light emitting element is mounted, and a base made of a plate-like metal material on which the mounting substrate is provided. A support body made of an insulating material that supports the light source unit, and each of the plurality of light source units is disposed around the support body with a back surface of the base body facing inward, and one end portion of the base body The base is provided with a cover made of an insulating material that covers the periphery of the base, and the other end of the base is insulated between the other end and the inside. Provided is a lamp comprising a lid made of a material.

Further, the present invention is characterized in that in the lamp described above, a heat radiating fin is provided on the back surface of the base.

Further, the present invention is characterized in that, in the lamp, a vent hole is formed in the lid.

Further, the present invention is characterized in that, in the lamp, the cover is provided with a flange that protrudes to an adjacent light source unit.

Further, the present invention is characterized in that, in the lamp, the mounting substrate is directly attached to the base.

Further, the present invention is characterized in that, in the lamp described above, the lid body is connected to the other end portions of the bases of the plurality of light source units, and is provided substantially flush with the tip end of the other end portion. To do.

According to the present invention, in the lamp, heat dissipation can be ensured and electric shock can be prevented.

FIG. 1 is a perspective view of the LED lamp according to the first embodiment. FIG. 2 is a side view of the LED lamp. FIG. 3 is a plan view of the LED lamp. FIG. 4 is an exploded perspective view of the LED lamp. FIG. 5 is a perspective view of the LED lamp with one of the light source units removed. FIG. 6 is an exploded perspective view of the light source unit. 7A and 7B are diagrams showing the light source unit, where FIG. 7A is a front view of the light source unit viewed from the back side, FIG. 7B is a plan view, and FIG. 7C is a side view. FIG. 8 is a chart showing an example of the correlation between the angle of the heat radiating fin (inclination angle) and the temperature of the light source unit. FIG. 9 is a table showing an example of the correlation between the interval between the heat radiating fins and the temperature of the light source unit. FIG. 10 is a perspective view of the LED lamp as viewed from above. FIG. 11 is a perspective view of the light source unit according to the second embodiment viewed from the back side. FIG. 12 is a plan view showing a light source unit and a light source unit according to the third embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
1 to 4 are diagrams showing a configuration of an LED lamp 1 according to a first embodiment, in which FIG. 1 is a perspective view, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. 4 is an exploded perspective view. It is.
As shown in FIG. 1, the LED lamp 1 is a so-called cap-type lamp in which an LED 20 as an example of a light-emitting element is used as a light source and has a cap 10. The base 10 is of a type that fits into an existing socket, and the LED lamp 1 can be mounted on an existing socket and used.
The LED lamp 1 extends like a bar like an arc tube of an HID lamp (discharge lamp), and emits radiated light substantially uniformly over the extending direction around the extending direction. Moreover, the LED lamp 1 has a light output that can be used in place of a high-power type existing discharge lamp such as an HID lamp.
In addition, it can replace with LED20 and can use arbitrary elements for the light emitting element of a light source.

However, while the discharge lamp is lit with AC power, the light emitting elements such as LEDs are lit with DC power. Therefore, when the LED lamp 1 using the LED 20 as a light source is lit with an AC commercial power supply, the DC lamp 1 receives DC power through a power supply circuit (also referred to as a power conversion circuit) that converts AC power from the commercial power supply into DC power. Supplied.
The LED lamp 1 does not include the power supply circuit, but is provided with a power supply circuit on the socket side so that DC power is input from the socket through the base 10. In other words, when the LED lamp 1 is used by being mounted on an existing lamp for a discharge lamp, the LED lamp 1 is used after the ballast included in the lamp is replaced with the power supply circuit.

Next, the configuration of the LED lamp 1 will be described in detail.
As shown in FIGS. 1 to 4, the LED lamp 1 includes the base 10, a cylindrical mounting body 11 having the base 10 attached to one end, and a cylindrical shape connected to the other end of the mounting body 11. The support 12, a plurality of (three in the present embodiment) light source units 13 arranged around the support 12 and supported by the support 12, and the light source units 13 are combined. And a coupling member 14.
The LED lamp 1 has an elongated lamp shape extending in a rod shape as a whole. That is, each light source unit 13 is formed in a long plate shape having a longitudinal direction, surrounds the periphery of the axis C passing through the center of the bar shape of the LED lamp 1, and is arranged in alignment with the axis C in the longitudinal direction. It is supported by. The axis C and the central axis of the base 10 are substantially coincident.
The base 10 is a screw-in type (rotating type) generally called an E-type base such as E26 type or E39 type, and is configured according to the existing size, and is screwed into an existing socket. It is possible. Direct current power from a lighting power source is supplied to the base 10 through a socket (not shown), and each light source unit 13 is turned on. The base 10 may be a plug-in type.

FIG. 5 is a perspective view of the LED lamp 1 with one of the light source units 13 removed.
As shown in FIG.4 and FIG.5, the support body 12 is provided with the cylindrical part 15 and the some attachment part 16, and these are integrally formed by the insulating material provided with electrical insulation. A resin material is preferably used for this insulating material. The cylindrical part 15 is a cylindrical part (cylindrical in this example) centering on the axis C, and the attachment body 11 is connected to the one end part 15a. Further, the cylindrical portion 15 is formed in a so-called cap shape with the other end portion 15b closed by a top surface 15c.
Each of the plurality of attachment portions 16 is a portion to which one end portion 13a of the light source unit 13 is attached. That is, the mounting portion 16 has a substantially rectangular parallelepiped shape, and is erected on the top surface 15c of the cylindrical portion 15 so as to surround the periphery of the axis C with the outer peripheral surface 16b serving as the mounting surface of the light source unit 13 facing outward. ing. Each mounting portion 16 is provided at a position corresponding to the arrangement position of the light source unit 13. In the LED lamp 1, the mounting portions 16 are provided at three locations at equal intervals (120 ° intervals) in the circumferential direction of the cylindrical portion 15. . These mounting portions 16 are integrally coupled by a coupling portion 16a provided at a position overlapping the axis C.

In the outer peripheral surface 16 b of each attachment portion 16, an introduction hole 17 that communicates with the cylindrical portion 15 through the inside of the attachment portion 16 is formed. A lead wire (not shown) of the light source unit 13 is passed through the introduction hole 17, and this lead wire passes through the inside of the support body 12 and the attachment body 11 from the introduction hole 17 and is connected to the base 10.
A screw hole 18 is formed below the introduction hole 17 on the outer peripheral surface 16b. The light source unit 13 has a fixed hole portion 19 at one end portion 13a in the longitudinal direction, and the outer peripheral surface 16b of each mounting portion 16 is inserted by a screw 45 inserted through the fixed hole portion 19 and fastened to the screw hole portion 18. Fixed to. That is, each light source unit 13 has one end 13a supported by the mounting portion 16 and extends upward along the axis C so as to surround the axis C, and is supported by the support 12 in a cantilever manner. Yes.
By arranging the three light source units 13 so as to surround the axis C, a space R through which air can flow is formed on the inner side (the side of the axis C) surrounded by the light source units 13.

As shown in FIGS. 3 to 5, the other end portion 13 b in the longitudinal direction of the light source unit 13 is coupled to each other by a coupling member 14. The coupling member 14 is also a plate-like lid that closes the end of the space R in the direction of the axis C. More specifically, the coupling member 14 closes communication between the other end portion 13b of the light source unit 13 and the inner space R, and prevents entry from the other end portion 13b of the light source unit 13 into the inner space R. It is a lid.
In the LED lamp 1, the coupling member 14 has a shape in plan view seen from the other end portion 13 b side of the space R in order to close the other end portion 13 b side of the space R, that is, the other end portions of the three light source units 13. In this example, the shape is a substantially equilateral triangle shape. The coupling member 14 is made of an insulating material that insulates electricity, for example, an insulating plastic. Thus, by setting it as the structure which connects the other end parts 13b of the light source unit 13 by the coupling member 14, space R can be ensured large, ensuring the rigidity of the LED lamp 1 effectively.

FIG. 6 is an exploded perspective view of the light source unit 13. 7 is a view showing the light source unit 13, FIG. 7 (a) is a front view of the light source unit 13 seen from the back side, FIG. 7 (b) is a plan view, and FIG. 7 (c) is a side view. It is.
The light source unit 13 emits radiated light using the LED 20 as a light source, and is a rectangular module extending along the axis C. The light source unit 13 is formed longer in the direction of the axis C than in the width direction thereof, and is formed in a rectangular shape when viewed from the front.

The LED lamp 1 includes three light source units 13, and these light source units 13 face the back surface 22 d of each base 22 inward and extend in the same direction as the axis C, and are equally spaced around the axis C. And is supported by the support 12. Thereby, light will be radiated | emitted to the range over the perimeter of the axis line C. FIG.
These light source units 13 all have the same structure and shape, and when configuring the LED lamp 1 with different light outputs, the number of light source units 13 corresponding to the desired light output is around the support 12. Arranged.
In the LED lamp 1, when the light source unit 13 is arranged around the axis C, a gap G <b> 1 is provided between the adjacent light source units 13. By providing the gap G1, external air can be taken into the space R through the gap G1 and the light source unit 13 can be cooled.

The light source unit 13 includes a mounting substrate 21 on which the LEDs 20 are mounted, a base body 22 to which the mounting substrate 21 is attached, and a cover 30 that covers the mounting substrate 21.
The mounting board 21 is a substantially rectangular plate-like printed wiring board, and a plurality of LEDs 20 and an electrode pattern 21a that constitutes a charging unit by soldering the lead wires are provided on the surface thereof. The electrode pattern 21a is formed at the end of the mounting substrate 21, and is electrically connected to each LED 20 in series or in parallel through a printed wiring (not shown).
The LED 20 is formed by arranging a large number of LED elements, for example, in a lattice shape in a substantially rectangular range in plan view, and molding the surface thereof with a thin thickness with a resin material, and substantially the entire surface emits light. As shown in FIG. 6, a plurality of (two in the illustrated example) LEDs 20 are arranged in series in the axis C direction on the mounting substrate 21 with almost no gap so that linear light emission can be obtained by these LEDs 20. It has become.

The base 22 is formed by forming a metal material (for example, aluminum), which is a kind of high thermal conductivity material having high thermal conductivity, into an elongated rectangular plate shape, and receives heat generated by the base for packaging the mounting substrate 21 and the LED 20. It functions as a heat sink that dissipates heat.
More specifically, as shown in FIG. 6, the base body 22 is formed in a thin plate shape (plate shape with a flat front and back) having a surface area that can accommodate the mounting substrate 21 therein, and the surface 22c A mounting portion 22f is formed. The mounting portion 22f is a recess having a depth that allows the mounting substrate 21 to be substantially flush with the base 22. The mounting portion 22f is formed in a planar shape so that the bottom surface of the mounting portion 22f can be in close contact with the mounting substrate 21. The heat transfer from the substrate to the base 22 is enhanced. The mounting substrate 21 is directly attached to the mounting portion 22f without using a sheet-like electrical insulating member or the like. For this reason, the heat of the mounting substrate 21 is efficiently transmitted to the base body 22.

A substantially rectangular lead-out hole 23 penetrating the base 22 is provided at one end 22 a in the longitudinal direction of the base 22, and the lead wire passes through the lead-out hole 23 and is drawn out to the back surface 22 d side. A cylindrical section 24 having a rectangular cross section connected to the edge of the outlet hole 23 is formed on the rear surface 22d so as to stand on the rear surface 22d. Further, on the back surface 22d, protrusions 25 are provided on both sides of the cylinder part 24, and each protrusion 25 is formed on both sides of the cylinder part 24 so as to extend in the axis C direction.
The fixed hole portion 19 is formed closer to the end of the one end portion 22a than the cylindrical portion 24 is. Further, the one end portion 22a is provided with a fixing hole portion 22g fixed by a screw 45.
The base body 22 is positioned by the cylindrical portion 24 being inserted into the introduction hole 17 (FIG. 5) and the pair of protrusions 25 are fitted to the both side surface portions 16 c (FIG. 5) of the mounting portion 16, and is fixed by screws 45. .

A rod-like connecting stay portion 26 that protrudes toward the axis C is provided upright on the back surface 22 d of the other end portion 22 b in the longitudinal direction of the base body 22. The connecting stay portion 26 is located at a substantially central position in the width direction of the base body 22, and at a position entering the end portion 22 a side from the end surface 27 of the other end portion 22 b of the base body 22 by the thickness of the coupling member 14. Is provided. A screw hole 26a is formed at the tip of the connection stay portion 26, and the coupling member 14 is fixed to the connection stay portion 26 by a coupling member fixing screw 28 fastened to the screw hole 26a.

A plurality of long plate-shaped heat radiation fins 29 are provided upright on the back surface 22 d of the base 22. The radiating fins 29 are formed on the back side of the mounting portion 22f so that the heat of the mounting substrate 21 housed in the mounting portion 22f on the surface 22c can be efficiently radiated. A plurality of radiating fins 29 are provided in a range over the entire width direction of the base body 22, and a plurality of radiating fins 29 are provided in a range over a section between the connecting stay portion 26 and the cylindrical portion 24 in the longitudinal direction. ing.
Each radiating fin 29 extends in a direction inclined with respect to the axis C. That is, the radiating fins 29 are provided in a shape that is not parallel to the longitudinal direction of the base 22 but extends in a direction inclined by a predetermined angle. The inclination angle of each radiation fin 29 is the same, and the height and thickness of each radiation fin 29 are the same over its entire length. In addition, the radiating fins 29 are provided to extend linearly at equal intervals and in parallel. In addition, the inclination angle of each radiation fin 29 does not need to be the same, and it is not necessary to form all the radiation fins 29 in parallel. Further, the radiating fins need not be equally spaced.

The cover 30 covers the surface 22 c of the base 22 and forms a waterproof structure with the base 22. The cover 30 is formed in a rectangular shape in a front view corresponding to the shape of the surface 22c and covers substantially the entire surface 22c, and an outer periphery provided over the entire periphery of the edge of the cover body 31. And a surface cover portion 32. The cover main body 31 is formed with a dome-shaped bulging portion 31 a having a semicircular cross section at a position corresponding to the LED 20. Here, the entire cover 30 is made of a material having translucency and electrical insulation, and in this example, is made of a resin material.
The outer peripheral surface cover portion 32 is formed so as to cover the outer peripheral portion 22e, which is the outer surface of the base member 22, over the entire periphery. When the cover 30 is attached, the outer peripheral surface cover portion 32 is attached to the inner surface of the outer peripheral surface cover portion 32. The outer peripheral portion 22e of 22 enters and fits.

In the outer peripheral surface cover portion 32, a plate-like flange portion 33 protruding toward the side (outer side) is formed on the long-side outer peripheral portion 32 a which is a pair of outer peripheral portions extending in parallel with the axis C. The flange portion 33 is provided at the tip of the outer peripheral surface cover portion 32 in the protruding direction, and is provided over substantially the entire length of the cover 30.
A waterproof packing (not shown) is interposed between the cover 30 and the base body 22. The cover 30 includes a seat portion 31 b through which the screw 45 is inserted in the cover main body portion 31. The cover main body 31 and the base body 22 are fastened together with the mounting portion 16 by screws 45.

Here, the radiation fin 29 will be described in detail.
In the present embodiment, a gap G1 is provided between adjacent light source units 13 in the circumferential direction (the direction around the axis C), and the space R is formed from the gap G1 or the gap between the light source unit 13 and the support 12. Part of the air that has flowed in passes through the ventilation path 35 between the radiation fins 29 and cools the radiation fins 29.
When the LED lamp 1 shown in FIG. 2 is arranged vertically so that the axis C is oriented in the vertical direction, one side in the width direction of the base 22 is an inlet 35a (FIG. 7) of the airflow W flowing through the ventilation path 35, and the width direction The other side becomes the discharge port 35b of the airflow W. Since the air heated by the light source unit 13 flows upward, the flow flowing from each inlet 35a at a lower position to each outlet 35b at a higher position becomes dominant.

Since the light source unit 13 is formed longer in the direction of the axis C than in the width direction, the radiation fins 29 are arranged in parallel to the axis C by arranging the radiation fins 29 inclined with respect to the axis C. Compared with the case, the distance of the ventilation path 35 is short. For this reason, an air current can be efficiently passed through the air passage 35, and the heat of the light source unit 13 can be efficiently radiated. Further, since the radiating fins 29 are inclined and extend with respect to the axis C, the airflow passing through the radiating fins 29 on the lower side of the light source unit 13 is discharged from the upper and lower intermediate outlets 35b, and the lower side heat is supplied. Can be prevented from affecting the upper radiation fin 29. For this reason, it can prevent that heat concentrates on the upper radiation fin 29, and can cool the light source unit 13 efficiently. Furthermore, when each radiating fin is arranged in parallel to the axis C, the inflow direction of the airflow is limited to the vertical direction, but by extending the radiating fin 29 by inclining, the vertical direction and the lateral direction Airflow can be used. For this reason, an air flow can be efficiently flowed to the ventilation path 35, and the light source unit 13 can be cooled efficiently.
As shown in FIG. 5, the adjacent light source units 13 are the same components, and the inclination directions of the heat radiation fins 29 are also the same between the adjacent light source units 13.

FIG. 8 is a chart showing an example of the correlation between the angle S (inclination angle) at which the radiating fin 29 extends with respect to the axis C and the temperature of the light source unit 13. FIG. 8 shows the result when the LED lamp 1 is vertically arranged, and shows the result of the test conducted by the present inventors. Here, in FIG. 8, the angle S of the radiation fin 29 is an angle with respect to the reference line L (FIG. 7) orthogonal to the axis C.
As shown in FIG. 8, when the angle S of the radiating fin 29 was 0 °, that is, an angle orthogonal to the axis C, the temperature of the light source unit 13 was the highest. This is considered to be because the airflow hardly flows in the ventilation path 35.

When the angle S of the radiating fins 29 was 15 °, the temperature of the light source unit 13 was lower than when the angle S was 0 °. This is considered to be because the airflow easily flows through the ventilation path 35.
When the angle S of the radiating fin 29 was 90 °, that is, an angle parallel to the axis C, the temperature of the light source unit 13 was lower than when the angle S was 15 °. This is considered to be because the airflow flows through the ventilation path 35 more easily than when the angle S is 15 °.
When the angle S of the radiating fin 29 is 0 °, 15 °, and 90 °, the temperature value of the light source unit 13 can be connected by an approximate straight line A1, and the angle S of the radiating fin 29 and the temperature of the light source unit 13 are It can be seen that is in a linear relationship.

When the angle S of the radiating fin 29 is 30 °, the temperature of the light source unit 13 is significantly lower than that when the angle is 15 °, and is significantly lower than the temperature predicted from the approximate straight line A1. In addition, the temperature of the light source unit 13 when the angle S of the radiating fins 29 is 30 ° is lower than when the angle S of the radiating fins 29 is 90 °. This is because by tilting the radiating fins 29 with respect to the axis C, an effect of allowing the air flow to flow efficiently through the ventilation path 35 is obtained, and this effect is remarkably generated by setting the angle S to 30 °. It is thought that.

When the angle S of the radiating fin 29 is 45 °, the temperature of the light source unit 13 is lower than that when the angle S is 30 °, and is significantly lower than the temperature predicted from the approximate straight line A1.
When the angle S of the radiating fin 29 is 60 °, the temperature of the light source unit 13 is the lowest and is significantly lower than the temperature predicted from the approximate straight line A1.
When the angle S of the radiating fin 29 is 75 °, the temperature of the light source unit 13 is equivalent to that when the angle S is 45 °, and is significantly lower than the temperature predicted from the approximate straight line A1.

The value of the temperature of the light source unit 13 when the angle S of the radiating fins 29 is 0 °, 30 °, 45 °, 60 °, 75 °, and 90 ° can be connected by an approximate curve A2. The approximate curve A2 is a substantially quadratic curve in which the temperature of the light source unit 13 is the lowest when the angle S of the radiating fins 29 is 60 °.
From this experimental result, it is clear that when the angle S of the radiating fin 29 is in the range of 25 ° to 85 °, a significant difference from the result predicted from the approximate straight line A1 can be seen. The light source unit 13 can be effectively cooled by the radiation fins 29 by setting the angle S of the radiation fins 29 to a range of 25 ° to 85 °. Furthermore, it is more preferable that the angle S of the radiating fins 29 be in the range of 45 ° to 75 ° because the temperature of the light source unit 13 can be greatly reduced.

FIG. 9 is a chart showing an example of the correlation between the distance between the radiation fins 29 and the temperature of the light source unit 13. FIG. 9 shows the results when the angle S of the radiating fins 29 is set to 60 ° and the LED lamps are arranged vertically, and shows the results of tests conducted by the present inventors. Here, in FIG. 9, the interval between the radiation fins 29 is the distance between the opposing surfaces of the adjacent radiation fins 29.
As shown in FIG. 9, the temperature of the light source unit 13 was higher when the distance between the heat dissipating fins 29 was 12 mm than when the distance between the heat radiating fins 29 was 3 mm. The temperature value of the light source unit 13 when the distance between the radiation fins 29 is 3 mm and 12 mm can be connected by the approximate straight line B1.
When the interval between the heat radiating fins 29 was changed between 3 mm and 12 mm, the temperature of the light source unit 13 decreased as the interval increased from 3 mm, and was lowest at 6 mm. Further, the temperature of the light source unit 13 increased as the distance between the radiation fins 29 increased from 6 mm, and was highest at 12 mm. It is considered that the airflow can be efficiently flowed through the ventilation path 35 by setting the distance between the radiation fins 29 to 6 mm.

From this experimental result, it has been clarified that the temperature of the light source unit 13 can be lowered by setting the interval between the radiation fins 29 in the range of 4 mm to 11 mm, as predicted from the approximate straight line B1. Furthermore, it is more preferable that the temperature of the light source unit 13 can be greatly reduced by setting the interval between the radiation fins 29 to a range of 5 mm to 9 mm.

In the present embodiment, an electric shock prevention structure is provided so that a finger of a user or an operator does not touch the base body 22 and the heat radiation fin 29 from the outside of the LED lamp 1. Hereinafter, the structure for preventing electric shock will be described.
As shown in FIGS. 6 and 7, the outer peripheral surface cover portion 32 of the cover 30 is formed higher than the outer peripheral portion 22e of the base 22, and the light source unit 13 is placed on the back surface 22d side as shown in FIG. , The outer peripheral part 22e is one step lower than the outer peripheral surface cover part 32. Moreover, as shown in FIG.7 (c), in the side view, the outer peripheral part 22e is completely covered with the outer peripheral surface cover part 32, and is not exposed outside. The outer peripheral surface cover portion 32 is formed integrally with the cover 30 and is made of an insulating material.
The outer peripheral surface cover part 32 has a plurality of claw parts 34 projecting inward of the cover 30 at the tip part, and the cover 30 is fixed to the base body 22 by being caught by the end of the outer peripheral part 22e of the base body 22. Is done.

As shown in FIGS. 1 to 3, in the LED lamp 1, since the base 22 is covered by the outer peripheral surface cover portion 32 of the cover 30, an operator or the like does not directly touch the base 22, and the base 22 Electric shock due to touching is prevented.
Each light source unit 13 is arranged so as to form a space R of a substantially regular polygon (substantially regular triangle in the present embodiment) on the inner side, and the gap G1 is formed at each vertex of the substantially regular polygon. Formed in position. The gap G1 is a gap in the circumferential direction of the LED lamp 1 formed between the adjacent light source units 13, and extends the flange 33 from the cover 30 to the gap G1 (that is, toward the adjacent light source unit 13). , Its size has been adjusted.

That is, the gap G1 is a gap between the tips of the adjacent flanges 33. The size of the gap G1 is set so that the test finger T having a predetermined shape formed on the assumption of a human finger can only enter the space R to a predetermined depth. Specifically, the predetermined depth is a depth at which the test finger T (FIG. 3) that has entered the space R does not come into contact with the radiation fins 29. For this reason, it is possible to prevent the finger of an operator or the like from entering the space R and touching the heat radiation fin 29 by the flange portion 33 while taking the air from the gap G <b> 1 to cool the heat radiation fin 29.

As shown in FIGS. 3 to 5, the coupling member 14 is a plate-like lid formed in a substantially regular polygon shape that is slightly smaller than the substantially regular polygon shape of the space R. The end portion 13b is partitioned to close the opening Rk (that is, formed by being edged by the other end portion 13b).
The coupling member 14 is provided with a ventilation hole 40 near each vertex of the substantially regular polygonal shape, and a central hole 41 is also provided at a central portion overlapping the axis C.
Further, the coupling member 14 includes a seat portion 42 through which the coupling member fixing screw 28 is inserted between the adjacent ventilation holes 40.
The surface 14a of the coupling member 14 is flat except for the hole portion. Receiving portions 43 projecting toward the space R are formed at positions corresponding to the respective seat portions 42 on the back surface of the coupling member 14.

The coupling member 14 is coupled to each light source unit 13 by placing the receiving portion 43 on the coupling stay portion 26 and fastening the coupling member fixing screw 28 inserted through the seat portion 42 into the screw hole 26a. That is, the other end 13b of each light source unit 13 is integrally coupled via the coupling member 14, and the opening Rk at the upper end of the space R (the end opposite to the base 10 of the LED lamp 1) is the coupling member. 14 is blocked.
The surface 14 a of the coupling member 14 is provided substantially flush with the upper end surface 30 a (tip surface) of the cover 30 of the light source unit 13. For this reason, even if it is the structure which provided the coupling member 14 and improved the rigidity of the light source unit 13, the LED lamp 1 can be reduced in size.

Since the coupling member 14 is slightly smaller than the substantially regular polygonal shape of the space R, an upper gap G <b> 2 (FIG. 10) is formed between the outer peripheral surface of the coupling member 14 and the light source unit 13. As described above, since the upper gap G2, the ventilation hole 40, and the central hole 41 are provided on the coupling member 14 side, air can enter and leave the space R from the upper gap G2, the ventilation hole 40, and the central hole 41, and heat is radiated. The fins 29 can effectively dissipate heat.
The upper gap G2 is set to a size that is smaller than the gap G1 so that the test finger T does not touch the radiating fins 29 through the upper gap G2. For this reason, a finger of an operator or the like is prevented from touching the heat radiation fin 29.
Further, the ventilation hole 40 and the central hole 41 of the coupling member 14 are set to a size that prevents the test finger T from touching the radiation fin 29 through the ventilation hole 40 and the central hole 41. For this reason, a finger of an operator or the like is prevented from touching the heat radiation fin 29.

FIG. 10 is a perspective view of the LED lamp 1 as viewed from above. FIG. 10 shows a state where one light source unit 13 is removed.
As shown in FIG. 10, a relatively large corner gap G3 is formed between the apex of the substantially regular polygonal shape of the coupling member 14 and the upper end of the gap G1. The corner gap G3 is set to a size such that the test finger T does not touch the radiating fin 29 through the corner gap G3. For this reason, it is possible to prevent a finger of an operator or the like from touching the radiating fin 29 while adopting a configuration in which air enters and leaves the space R from the corner gap G3.
On the one end 13a side, a relatively large corner gap G4 is formed between the support 12 and the lower end of the gap G1. The corner gap G4 is set to a size such that the test finger T does not touch the radiating fin 29 through the corner gap G4. For this reason, it is possible to prevent a finger of an operator or the like from touching the radiation fin 29 while adopting a configuration in which air enters and leaves the space R from the corner gap G4.

As described above, according to the first embodiment to which the present invention is applied, the LED lamp 1 includes the plurality of light source units 13 having the mounting substrate 21 on which the LEDs 20 are mounted on the surface 22c of the base body 22, The plurality of light source units 13 are arranged around the axis C of the LED lamp 1 with the back surface 22d of each base 22 facing inward and with a gap G1 therebetween, and the back surface 22d of the base 22 has an axial direction of the axis C. Radiating fins 29 are provided so as to be inclined with respect to the surface.
Thereby, it is possible to flow an air flow from the direction different from the direction of the axis C of the LED lamp 1 and the direction of the axis C to the ventilation path 35 which is a flow path of the radiation fin 29, and the air flow to the ventilation path 35 of the radiation fin 29. Since it can flow efficiently, the heat of the LED lamp 1 can be efficiently radiated by the radiation fins 29. Further, since the airflow passing through the heat radiation fins 29 on the lower side of the light source unit 13 is discharged from the upper and lower middle discharge ports 35b, heat can be prevented from concentrating on the upper heat radiation fins 29, and the light source unit can be efficiently used. 13 can be cooled.

The light source unit 13 is formed longer in the direction of the axis C than in the width direction, and a plurality of LEDs 20 are arranged in the direction of the axis C.
Thereby, since the distance of the ventilation path 35 of the airflow along the radiation fin 29 can be shortened and the airflow can be efficiently flowed to the ventilation path 35 of the radiation fin 29, the heat of the LED lamp 1 is efficiently radiated by the radiation fin 29. it can.
In addition, since the angle S of the radiating fin 29 with respect to the reference line L orthogonal to the axis C is in the range of 25 ° to 85 °, the airflow can be efficiently passed through the ventilation path 35 of the radiating fin 29, and the LED lamp 1 Can be efficiently radiated by the radiation fins 29.
In addition, heat can be efficiently radiated by setting the distance between the radiation fins 29 to a range of 4 mm to 11 mm.

Further, according to the first embodiment to which the present invention is applied, the LED lamp 1 includes a plurality of light sources in which the mounting substrate 21 on which the LEDs 20 are mounted is provided on the surface 22c of the base 22 made of a substantially flat metal material. The unit 13 and a support 12 made of an insulating material and supporting the plurality of light source units 13 are provided. The light source unit 13 includes a cover 30 made of an insulating material that covers the mounting substrate 21 and the outer peripheral portion 22e of the base body 22, The one end portion 13a is attached so as to cover the support 12 from the periphery, and is disposed around the axis C of the LED lamp 1 with the back surface 22d of each base member 22 facing inward. The LED lamp 1 includes a plurality of light source units. 13 is provided with a coupling member 14 made of an insulating material that closes an opening formed by the other end 13b.
For this reason, the heat dissipation of the mounting substrate 21 is enhanced by the metal base 22. Further, the cover 30 made of an insulating material covering the outer peripheral portion 22e of the base 22 can prevent the finger from directly touching the outer peripheral portion 22e as well as the surface 22c. In addition, since the opening formed by the other end portion 13b of the light source unit 13 is blocked by the coupling member 14 made of an insulating material, the coupling member 14 made of an insulating material means that a finger enters the opening portion Rk made by the other end portion 13b. Therefore, it is possible to prevent the finger from coming into contact with the heat radiation fin 29. Thereby, since it is not necessary to cover the whole LED lamp 1 with a cover or the like, the heat dissipation of the LED lamp 1 can be ensured and an electric shock can be prevented.

In addition, since the cover 30 and the coupling member 14 that cover the outer peripheral portion 22e are provided, it is possible to prevent a finger from touching the radiation fins 29 on the back surface 22d of the base 22.
Moreover, since the ventilation hole 40 is formed in the coupling member 14, favorable heat dissipation can be obtained while preventing an electric shock.

Furthermore, since the collar part 33 protruding in the gap G1 between the light source units 13 is provided, it is possible to prevent an electric shock by preventing the finger from entering the gap G1, and to dissipate heat from the gap G1.
Further, since the mounting substrate 21 is directly attached to the base 22, heat is efficiently transmitted from the mounting substrate 21 to the base 22. For this reason, heat can be efficiently radiated through the radiation fins 29. Even in the configuration in which the mounting substrate 21 is directly attached to the base body 22, it is possible to prevent the finger from touching the base body 22 by the electric shock prevention structure.

Further, the coupling member 14 couples the other end portions 13b to each other and is provided substantially flush with the upper end surface 30a of the other end portion 13b. For this reason, while being able to prevent an electric shock with a simple structure using the coupling member 14 which couple | bonds the other end part 13b, the LED lamp 1 can be made compact by the part which the coupling member 14 does not protrude.

In addition, the said 1st Embodiment shows the one aspect | mode which applied this invention, Comprising: This invention is not limited to the said 1st Embodiment.
In the said 1st Embodiment, although the clearance gap G1 was demonstrated as what is a clearance gap between the front-end | tips of the adjacent collar part 33, this invention is not limited to this. For example, you may set the magnitude | size of the clearance gap G1 by adjusting the thickness of the outer peripheral surface cover part 32, without providing the collar part 33. FIG.
Moreover, in the said 1st Embodiment, although the LED lamp 1 was demonstrated as what is vertically arrange | positioned so that the axis line C may become vertical, this invention is not limited to this, LED lamp 1 is shown. You may lay down. For example, a horizontal arrangement in which the axis C is oriented in the horizontal direction is also possible, and in this case as well, the radiation fins 29 are inclined with respect to the vertical airflow, so air can be taken in from each light source unit gap G1, Since the air warmed by the heat from the LED 20 escapes to the outside through the gap G1 on the opposite side, heat can be radiated efficiently.

In the first embodiment, the cover 30 made of an insulating material has been described as covering the mounting substrate 21 and the outer peripheral portion 22e of the base body 22, but the cover 30 may not be integrated. For example, the outer peripheral surface cover part 32 and the cover main body part 31 may be configured separately and the outer peripheral surface cover part 32 may be an insulator.
In the first embodiment, the light source unit 13 has been described as being disposed so as to form a substantially equilateral triangular space R on the inside thereof. However, the present invention is not limited to this, and for example, the light source unit 13. May be arranged so as to form a substantially square space inside. In this case, the coupling member 14 is also formed in a substantially regular square according to the shape of the space.
Moreover, in the said 1st Embodiment, although each radiation fin 29 was demonstrated as what was extended linearly, this invention is not limited to this. Each radiating fin 29 should just incline with respect to the axis C between the inflow port 35a and the discharge port 35b, seeing the flow path as a whole, for example, between the inflow port 35a and the discharge port 35b. May be curved.

<Second Embodiment>
Hereinafter, a second embodiment to which the present invention is applied will be described with reference to FIG. In the second embodiment, parts that are configured in the same manner as in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.
In the first embodiment, the height of each radiating fin 29 has been described as being the same over its entire length, but in the second embodiment, the height of the radiating fin 29 is the length direction thereof. This is different from the first embodiment described above.

FIG. 11 is a perspective view of the light source unit 113 according to the second embodiment viewed from the back side.
The light source unit 113 includes a base body 122 and a cover 30. The base 122 is the same as the base 22 except for the shape of the radiation fins 129.
The radiating fin 129 is formed so that its height gradually increases as it goes from the inlet 35a side of the airflow W to the outlet 35b.
According to the second embodiment, in order to make the portion of the radiation fin 129 on the discharge port 35b side that can efficiently radiate heat by rectifying the airflow fin 129 and adjusting the airflow higher than the portion on the inflow port 35a side, The heat radiation fin 129 can be reduced in weight while securing the heat radiation performance of the heat radiation fin 129.

<Third Embodiment>
Hereinafter, a third embodiment to which the present invention is applied will be described with reference to FIG. In the third embodiment, parts that are configured in the same manner as in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.
In the first embodiment, the adjacent light source units 13 are the same components, and the inclination direction of the radiation fins 29 is also assumed to be the same between the adjacent light source units 13. The third embodiment is different from the first embodiment in that the inclination direction of the radiation fins 29 is different between adjacent light source units 13.

FIG. 12 is a plan view illustrating the light source unit 13 and the light source unit 213 according to the third embodiment. Here, in FIG. 12, a state in which the light source unit 13 and the light source unit 213 are unfolded on a plane in a direction removed from the LED lamp 1 is shown.
The light source unit 213 is formed symmetrically with respect to the light source unit 13 with respect to the axis C. Since the light source unit 13 and the light source unit 213 are bilaterally symmetric, the same reference numerals are given to the respective parts and description thereof is omitted here.

In the light source unit 13 and the light source unit 213, the inflow ports 35a are arranged adjacent to each other, and the discharge ports 35b are located far from each other.
According to the third embodiment, the adjacent light source units 13 and the heat radiation fins 29 of the light source units 213 are formed substantially symmetrically with respect to the axis C, and therefore, the heat radiation fins of one adjacent light source unit 13. It is possible to prevent the warmed airflow W discharged from the 29 outlets 35 b from flowing into the inlets 35 a of the radiation fins 29 of the other light source unit 213. For this reason, it is difficult to be affected by the heat from the adjacent light source units, and the heat radiation fins 29 can efficiently radiate heat.

1 LED lamp (lamp)
DESCRIPTION OF SYMBOLS 12 Support body 13,113,213 Light source unit 13a One end part 13b Other end part 14 Connection member (lid body)
20 LED (light emitting device)
21 mounting

substrate

22, 122 base 22c surface 22e outer peripheral part (peripheral part)
22d Back surface 29,129 Radiation fin 30 Cover 30a Upper end surface (tip surface)
32 Outer peripheral surface cover part 33 Gutter part 40 Ventilation hole C axis

Claims

A plurality of light source units each including a mounting substrate on which a light emitting element is mounted, and a base made of a plate-like metal material on which the mounting substrate is provided;
A support made of an insulating material that supports the plurality of light source units, and
Each of the plurality of light source units is
Arranged around the support with the back side of the base facing inward, supported by the support at one end of the base,
The surface of the base is provided with a cover made of an insulating material that covers the peripheral edge of the base,
The lamp is characterized in that the other end portion of the base body is provided with a lid made of an insulating material that closes between the other end portion and the inner side.
The lamp according to claim 1, wherein a heat radiating fin is provided on a back surface of the base.
The lamp according to claim 1 or 2, wherein a ventilation hole is formed in the lid.
The lamp according to any one of claims 1 to 3, wherein the cover is provided with a flange that protrudes to an adjacent light source unit.
The lamp according to any one of claims 1 to 4, wherein the mounting substrate is directly attached to the base.
The said cover body couple | bonds the other end part of each base | substrate of the said several light source unit, and is provided in the front-end | tip of the said other end part, and substantially flush. Lamp described in.