JP2013084434A - Lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp that can obtain high heat radiation performance.SOLUTION: The LED lamp 1 includes an LED board 16 on which LEDs 15 are mounted, a base plate 13 as a flat plate part on which the LED board 16 is loaded, and a cylindrical part 2 which extends from a rear face 13A of the base plate 13 and has a base 3 installed on the terminal end and an electric circuit board 8 housed inside. A plurality of heat radiation fins 25 which extend along the cylindrical part 2 with a gap against the cylindrical part 2 radially with the cylindrical part 2 as a center are provided on the rear face 13A of the base plate 13, and a coupling part 105 which couples end parts of the cylindrical part 2 side of at least two heat radiation fins 25 and forms an airflow route F against the cylindrical part 2 is provided.

Description

  The present invention relates to a cap-type lamp using a light emitting element such as an LED (Light Emitting Diode) or an organic EL (Electro Luminescence) as a light source.

In recent years, with the increase in output and cost of LEDs, which are a kind of semiconductor light-emitting elements, cap-type LED lamps that can be used as an alternative to light bulbs have become widespread. In general, this type of LED lamp has an LED substrate on which an LED is mounted mounted on a flat disk, and a cylindrical portion containing an electric circuit board such as a power circuit is connected to the back of the flat disk. A cap is provided at the end of the cylindrical portion (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).
Further, in this type of LED lamp, a heat dissipation structure in which a flat disk and a cylindrical portion are formed of a heat conductive material and a large number of heat dissipation fins are provided in the cylindrical portion is generally employed. By providing such a heat dissipation structure, a high-power LED can be mounted.

JP 2010-010134 A JP 2009-206104 A JP 2011-60754 A

However, the conventional heat dissipating fins cannot obtain a sufficient heat dissipating performance, and in particular, the heat generated in the cylindrical portion cannot be efficiently dissipated.
This invention is made | formed in view of the situation mentioned above, and aims at providing the lamp | ramp which can obtain high heat dissipation performance.

  In order to achieve the above object, the present invention provides a substrate on which a light emitting element is mounted, a flat plate portion on which the substrate is mounted, a base extending from the back surface of the flat plate portion, and a terminal at the end, and an electric circuit substrate inside. In the lamp provided with the tubular portion housed, a plurality of pieces extending along the tubular portion with a gap between the tubular portion and a radial shape around the tubular portion on the back surface of the flat plate portion. A heat dissipating fin is provided, and at least two end portions of the heat dissipating fins on the cylindrical portion side are connected to each other, and a connecting portion that forms an air flow path between the end portions is provided.

  According to the present invention, in the lamp described above, a distribution fin that divides the air flow into each set is provided between a set of radiating fins connected by the connecting portion and another set.

  Further, the present invention is characterized in that in the above lamp, a short heat radiation fin having a length from the back surface of the flat plate portion shorter than that of the heat radiation fin is provided between the heat radiation fins connected by the connection portion. To do.

  Further, the present invention provides the above lamp, wherein a plurality of annular radiating fins are provided on the back surface of the flat plate portion, the length from the back surface of the flat plate portion being shorter than the short heat radiating fin, and surrounding the cylindrical portion. It is characterized by providing.

  Further, the present invention is characterized in that the lamp includes a heat conduction member provided between the heat generating component of the electric circuit board and the cylindrical portion, and transmitting heat of the heat generating component to the cylindrical portion. To do.

  According to the present invention, a plurality of flat portions arranged radially on the back surface of the flat plate portion on which the substrate on which the light emitting element is mounted is placed, and extending along the cylindrical portion with a gap from the cylindrical portion. The heat sink fins are provided, the end portions of at least two heat dissipating fins on the cylindrical portion side are connected to each other, and a connecting portion that forms an air flow path is provided between the end portions. Thereby, the outer peripheral surface of a cylindrical part can be air-cooled with the air which passes along an airflow path, and the electric circuit board accommodated in the inside of a cylindrical part can be cooled.

It is a figure which shows the LED lamp apparatus provided with the LED lamp which concerns on embodiment of this invention. It is a figure which shows the external appearance structure of an LED lamp, (A) is a top view, (B) is a side view, (C) is a bottom view. It is an upper perspective view which decomposes | disassembles and shows an LED lamp. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. It is a bottom view of the LED lamp of the state which removed the annular waterproof packing. It is VI-VI sectional drawing of FIG. It is VII-VII sectional drawing of FIG. It is the top view to which some C-shaped fins were expanded. It is the top view which looked at the housing | casing from the base-plate side. It is XX sectional drawing of FIG. It is an enlarged view of the termination | terminus of an insulation cylinder part. It is a figure which shows the fall prevention structure of an LED lamp. It is a figure which shows a band, (A) is a top view, (B) is a perspective view which shows the state in which the wire for fall prevention was attached. It is a figure which shows typically the positional relationship of the gravity center position of an LED lamp, and a support hole, (A) shows an installation state, (B) shows a drop-off state. It is a figure which shows typically the positional relationship of the gravity center position of the LED lamp of a reference structure, and a support hole, (A) shows an installation state, (B) shows a drop-off state. It is a sectional view of a base board. It is a figure which expands and shows the engaging part of a glove and a base board. It is a reference lineblock diagram of the structure where a glove is screwed and attached to a base board. It is a figure which expands and shows the mounting part of the LED lamp to the exposed socket.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the following embodiments, an LED lamp having an LED as a light source is exemplified as a lamp having a light emitting element as a light source. However, the present invention is not limited to this, and other light emission such as an organic EL, for example. The present invention can also be applied to a lamp having an element as a light source.

FIG. 1 is a diagram showing an LED lamp device 95 including the LED lamp 1 according to the present embodiment.
An LED lamp device 95 shown in the figure is an outdoor installation type lighting fixture used for outdoor signboard illumination and the like, and is attached to the LED lamp 1, a lamp holder 60 to which the LED lamp 1 is mounted, and the LED lamp 1. An annular waterproof packing 70 is provided.
The lamp holder 60 is a holder to which an existing light bulb can be mounted. The LED lamp 1 is configured to have substantially the same shape and optical characteristics as the existing light bulb, and is mounted on the lamp holder 60 instead of the existing light bulb. Can be used.

Specifically, the lamp holder 60 includes a cylindrical holder housing 62, and an arm mounting portion to which a support arm (not shown) is rotatably attached to a terminal portion 62 </ b> A of the holder housing 62. 64 is provided.
The front end 60B of the holder housing 62 opens with a diameter that engages with no gap on the surface of the glass bulb of the light bulb when the existing light bulb is mounted. Intrusion of water from the portion 66 is prevented. In addition, in the same figure, the protrusion 68 provided in the front-end | tip 60B of the holder housing | casing 62 is a member for fixing the guard member (not shown) which covers and protects the LED lamp 1 or the existing light bulb.

Inside the holder housing 62, a socket 65 into which the base of the existing bulb lamp and the base 3 of the LED lamp 1 are screwed is disposed. The socket 65 is connected to a power supply line drawn from outside, and power is supplied from the base 3 to the LED lamp 1 or the existing light bulb lamp through the socket 65.
The annular waterproof packing 70 is a rubber molded member, is detachably attached to a cylindrical portion 2 (described later) of the LED lamp 1, and closes the opening of the lamp holder 60 when the LED lamp 1 is attached to the lamp holder 60. Water intrusion from the gap between the lamp holder 60 and the LED lamp 1 is prevented.
The annular waterproof packing 70 is used for the purpose of preventing water from entering the lamp holder 60. For example, the LED lamp 1 is attached to the lamp holder 60 installed indoors or a socket exposed to the outside. When waterproofing is not required, such as when used, it is not necessary to attach the annular waterproof packing 70. However, dust or the like can be prevented from entering by installing the annular waterproof packing 70 during indoor use.

Next, the configuration of the LED lamp 1 will be described in detail.
2A and 2B are diagrams showing an external configuration of the LED lamp 1, FIG. 2A is a plan view, FIG. 2B is a side view, and FIG. 2C is a bottom view. 3 is an exploded top perspective view showing the LED lamp 1, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. In these drawings, the annular waterproof packing 70 is attached to the LED lamp 1.

The LED lamp 1 according to the present embodiment includes a light emitting unit 12, a cylindrical part 2 that extends downward and substantially perpendicular to the center of the rear surface of the light emitting unit 12, and has a base 3 provided on the terminal side, and a light emitting unit 12. A plurality of heat dissipating fins 25 provided on the back surface of the annular waterproof packing 70, and the annular waterproof packing 70 is fitted into the tubular portion 2.
The light emitting unit 12 emits light upward from substantially the entire upper surface 12A, and as shown in FIG. 3, a plurality of LEDs 15 serving as light sources and a substantially circular LED substrate in plan view on which these LEDs 15 are mounted. 16, a globe 22, and a base plate 13 as a flat plate portion provided integrally with the tip 2 </ b> C of the cylindrical portion 2.

The base plate 13 is a substantially disc-shaped member having a diameter larger than that of the cylindrical portion 2 as viewed from above, and the cylindrical portion 2 is substantially vertical downward from a substantially central portion of the back surface 13A of the base plate 13. It extends to. As shown in FIG. 3, an insertion opening 14 connected to the cylindrical portion 2 is opened on the surface of the base plate 13, and a power source (power conversion device) for lighting the LED 15 and an electric circuit board 8 mounted with a drive circuit are inserted. It is inserted from the opening 14 and stored in the cylindrical portion 2.
The base plate 13 and the cylindrical portion 2 are integrally molded from the same material, that is, a resin molding using a mold from a heat conductive resin material. A housing 35 of the LED lamp 1 is configured by the insulating cylinder portion 10.

A plurality of LEDs 15 are arranged side by side so as to form an annular arrangement that is substantially concentric with the cylindrical portion 2. From the outer peripheral side light emitting portion 15 </ b> A arranged in an annular shape on the outer peripheral side of the base plate 13, Also includes an inner circumferential light emitting portion 15B arranged in an annular shape on the inner circumferential side. Here, as an example, the outer light emitting portion 15A has 30 elements arranged at equal intervals, and the inner light emitting portion 15B has 15 elements arranged at equal intervals. When viewed per unit area, the outer light emitting portion 15A has a larger proportion of LED elements than the inner light emitting portion 15B, and the outer light emitting portion 15A has a unit area larger than the inner light emitting portion 15B. The amount of heat generated per hit is large.
The LED 15 is formed, for example, by packaging an LED element. In this embodiment, a white LED is used as the LED 15. Needless to say, an LED having a light emitting color other than white may be used for the LED 15.
As shown in FIG. 3, the LED substrate 16 is formed in a substantially disk shape, a plurality of LEDs 15 are mounted on the upper surface, and are fixed to the upper surface of the base plate 13 with a plurality of screws 18.

  A lead wire lead-out opening 17 is opened substantially at the center of the LED substrate 16, and a pair of lead wires 21A and 21B (FIG. 4) for supplying power from the electric circuit board 8 housed in the cylindrical portion 2 are led out. It is drawn out through the opening 17 and is electrically connected to a circuit pattern (not shown) formed on the upper surface of the LED substrate 16, and power is supplied to each LED 15 through the circuit pattern to light it.

As shown in FIGS. 3 and 4, the base plate 13 has a tray shape having a side wall 19 along the periphery of the flat disk, and a globe 22 that covers the LED substrate 16 is formed on the inner peripheral surface of the side wall 19. Engaged and held. An O-ring 26 as a seal member is provided between the globe 22 and the base plate 13, and the O-ring 26 is engaged with the side wall 19 as the glove 22 is engaged with the side wall 19 of the globe 22 and the base plate 13. The light emitting unit 12 is waterproofed. The mounting structure of the globe 22 and the base plate 13 will be described later in detail.
Although not illustrated, the globe 22 is provided with the name of the LED lamp 1 on the inner surface by printing, engraving, or the like. Thereby, even if the LED lamp 1 is exposed to wind and rain, the nameplate does not disappear and does not disappear due to rubbing.

  The heat radiating fins 25 are provided radially around the cylindrical portion 2 when viewed from the back surface 13 </ b> A of the base plate 13. Each radiation fin 25 is provided so as to extend from the back surface 13 </ b> A along the cylindrical portion 2, and radiates heat generated by the LED substrate 16 placed on the base plate 13. Each radiation fin 25 is formed integrally with the cylindrical portion 2 when the casing 35 is injection molded.

  The end 2A of the cylindrical portion 2 is integrally provided with a cylindrical insulating cylindrical portion 10 formed of an insulating material in order to insulate between the base 3 and the cylindrical portion 2, and is shown in FIG. As shown, the base 3 is attached to the terminal end 10 </ b> A of the insulating cylinder portion 10. The electric circuit board 8 is accommodated from the front end side of the cylindrical portion 2 to the insulating cylinder portion 10 and is electrically connected to the base 3 through lead wires 21A and 21B at the end portion on the insulating cylinder portion 10 side. Yes.

The base 3 includes a cylindrical shell 5 that is threaded into a socket 65 (for example, E39 or E26 (E39 in this embodiment) type socket) of the existing lamp holder 60, and an end portion of the shell 5. And an eyelet 7 provided via an insulating portion 6 on the top of the shell, and the shell 5 and the eyelet 7 are configured to have a shape and size that can be attached to an existing socket. Thereby, the said LED lamp 1 can be mounted | worn with the socket 65 of the said lamp holder 60 which mounts and uses the existing socket and the existing light bulb, and can use it as an alternative of the existing light bulb.
Since the shell 5 and the cylindrical portion 2 are electrically insulated by the insulating cylindrical portion 10 as described above, even if the cylindrical portion 2 is formed of a conductive material, the shell of the base 3 The insulation between 5 and the cylindrical part 2 is maintained well.

By the way, although a high heat radiation performance can be obtained by using a metal material such as aluminum for the cylindrical portion 2, the casing 35 including the cylindrical portion 2 becomes heavy, so that the existing socket has insufficient strength. There is also.
Therefore, in the present embodiment, a thermally conductive resin is used as the material of the cylindrical portion 2, an insulating resin is used as the material of the insulating cylindrical portion 10, and the insulating cylindrical portion 10 is integrally formed on the cylindrical portion 2 by insert molding. doing.

  By forming the cylindrical portion 2 from a heat conductive resin, the LED lamp 1 can be made lighter than when the casing 35 is formed of a metal material such as aluminum, and the LED lamp 1 can be used as an alternative to a light bulb. Even when it is mounted on the socket or the existing lamp holder 60, there is no need for work or members for reinforcing the existing socket or the existing lamp holder 60 in order to support the weight of the LED lamp 1, and it can be used as it is. Moreover, since the number of the radiation fins 25 can be increased by reducing the weight, the surface area can be increased and the heat dissipation can be improved more efficiently. As such a heat conductive resin, a resin material having a heat conductivity of 2 W / mK or more and excellent heat conductivity is preferable. For example, a highly heat conductive carbon fiber (in this embodiment, Lahima manufactured by Teijin Ltd. (registered) A polycarbonate resin mixed with a trademark)) can be suitably used.

However, although the insulating cylinder part 10 is integrally formed on the cylindrical part 2 by insert molding of a resin material, the insulating cylinder part 10 is firmly bonded. ) May cause a gap and may impair waterproofness.
Therefore, as shown in FIG. 4, the engagement uneven portion 2B is formed on the inner peripheral surface of the terminal end 2A of the cylindrical portion 2, and the engagement surface is formed on the outer peripheral surface in front of the opening end of the insulating cylindrical portion 10. An engaging uneven portion 10B that engages with the uneven portion 2B is formed to form a so-called labyrinth-like engaging structure, and the area of the connecting portion is increased to increase the bonding strength. Further, a flange 10C with which the terminal end 2A of the tubular portion 2 abuts is formed below the engaging uneven portion 10B of the insulating tubular portion 10 to prevent water from entering the labyrinth-like engaging structure portion. . With such a labyrinth-like engagement structure and the flange 10C, waterproofness is maintained even when a gap occurs in the insert molding surface due to cracks due to aging, etc. at the joint between the tubular portion 2 and the insulating tubular portion 10. The durability corresponding to the lifetime of the LED 15 is obtained.
The shape of the joining surface between the terminal end 2A of the tubular portion 2 and the opening end (insertion end) of the insulating tubular portion 10 is not limited to the labyrinth shape, and any shape that can improve waterproofness and joining strength can be obtained. For example, it can be an arbitrary shape such as a wedge shape. Further, the joining of the tubular portion 2 and the insulating tubular portion 10 may be performed by assembly by screw tightening or the like as long as various performance requirements are satisfied, other than by insert molding.

Next, a structure for housing the electric circuit board 8 in the cylindrical portion 2 will be further described.
As shown in FIG. 4, the electric circuit board 8 is formed in a length extending from the tip 2 </ b> C of the cylindrical portion 2 to the insulating cylindrical portion 10, and is engaged with the internal shapes of the cylindrical portion 2 and the insulating cylindrical portion 10. It has a shape to be formed.
That is, the upper diameter R (FIG. 4) of the cylindrical portion 2 is formed to be approximately the same as the upper lateral width of the electric circuit board 8, and when the electric circuit board 8 is inserted into the cylindrical portion 2, the insulating portion is insulated. The electric circuit board 8 is held between the holding parts 116 and 116 (FIG. 9) formed inside the cylindrical part 10, and the electric circuit board 8 is fixed in the cylindrical part 2.

At this time, in the cylindrical portion 2, if the upper diameter R is reduced to about the upper width of the electric circuit board 8 to achieve compactness, the electric circuit board 8 comes close to the cylindrical portion 2, and the cylindrical portion 2. The electrical insulation performance between the circuit board 8 and the electric circuit board 8 deteriorates. Therefore, an insulating sheet 28 wound around the electric circuit board 8 is provided in the cylindrical part 2, and the entire inner surface of the cylindrical part 2 is covered with the insulating sheet 28. The insulation performance between the cylindrical portions 2 is improved.
The insulating sheet 28 is formed into a cylindrical shape by winding one or more strips (in this embodiment, two windings) of a single belt-like sheet having flexibility and insulating properties. When inserted, the insulating sheet 28 expands by rewinding, and is mounted so as to cover the inner surface of the tubular portion 2 by the rewinding force at this time.
As described above, the insulating sheet 28 is formed in a band shape, inserted into the insertion opening 14 of the base plate 13 in a wound state, and mounted in the cylindrical portion 2 by rewinding the insulating sheet 28. The insulating sheet 28 can be easily attached so as to cover the entire inner surface of the portion 2.
Furthermore, the notch part 28B is provided in the lower edge part 28A (see FIG. 3) of the insulating sheet 28, and the insulating sheet 28 is aligned with the protrusion 14A (see FIG. 9) provided inside the cylindrical part 2. Since the positions of both end portions of the insulating sheet 28 to be wrapped when being wound can be determined, the cylindrical portion 2 can be made more compact. That is, when the portion where both end portions of the insulating sheet 28 wrap is inserted into the cylindrical portion 2, it is in a state where it does not know where it comes. The clearance of the cylindrical part 2 between the edge of the electric circuit board 8 is necessary, but the wrapped portion of the insulating sheet 28 is the edge of the electric circuit board 8 and the cylindrical part. By positioning with the projection 14A so as to avoid the gap between the two, the clearance between the edge of the electric circuit board 8 and the cylindrical portion 2 takes into account the thickness corresponding to the number of turns of the insulating sheet 28. Get better. Thereby, since a clearance can be made small, the cylindrical part 2 can be made further compact.

  As described above, the lower end side of the electric circuit board 8 inserted into the tubular portion 2 is sandwiched between the sandwiching portions 116 and 116 (FIG. 9) and is fixed in the tubular portion 2. At this time, the upper end portion 8 </ b> C of the electric circuit board 8 is pressed downward via the fixing bush 27 by the LED board 16 attached to the base plate 13.

More specifically, as shown in FIG. 4, a heat generating component 8X provided in a power supply circuit for lighting the LED 15 is mounted on the electric circuit board 8, and the heat generating component 8X has, for example, a metal having high thermal conductivity. A heat sink 29 made of metal is provided. 3 and 4, reference numeral 29 </ b> B is a meat stealing recess 29 </ b> B. By applying a grease-like thermally conductive silicon filler to the surface of the heat generating component 8X or the heat sink 29 and bringing them into close contact with each other, the heat generated by the heat generating component 8X is transmitted to the heat sink 29.
The fixed bush 27 is provided between the heat sink 29 and the cylindrical portion 2, and a contact protrusion 27 </ b> A is integrally provided on the upper end of the fixed bush 27. The contact protrusion 27A is pressed against the bottom surface of the LED board 16, whereby the electric circuit board 8 is pressed through the heat sink 29 and the heat generating component 8X.

  The fixed bush 27 is an elastic body having relatively good heat conductivity. When the fixed bush 27 is pressed against the cylindrical portion 2 by the heat sink 29, a heat conducting member 29D including the heat sink 29 and the fixed bush 27 is configured. The heat of the heat generating component 8X is transmitted to the cylindrical portion 2 through the heat conducting member 29D, and is radiated from the outer peripheral surface of the cylindrical portion 2 to the outside.

In this embodiment, as shown in FIGS. 3 and 4, the heat sink 29 is extended to the vicinity of the cylindrical portion 2, and the fixed bush 27 formed in a cap shape is covered on the tip portion 29 </ b> A. Is pressed against the cylindrical portion 2.
With this configuration, since the thickness of the fixing bush 27 interposed between the heat sink 29 and the cylindrical portion 2 is reduced, heat transfer from the heat sink 29 to the cylindrical portion 2 is facilitated.
When the fixing bush 27 is thinned, the elastic force is reduced correspondingly, and the electric circuit board 8 may be pushed by the fixing bush 27 and the heat sink 29 at the time of fixing. It is desirable to have a shape having cushioning properties that can suppress the bending.

Further, if the heat radiation from the surface of the heat sink 29 to the atmosphere of the cylindrical portion 2 is large, heat is trapped in the cylindrical portion 2 and may affect other circuit components. Therefore, in the heat sink 29, a heat radiation fin shape (uneven shape) is formed only at the tip portion 29A covered by the fixed bush 27, and the cap shape of the fixed bush 27 so as to enter and come into contact with the heat sink fin shape unevenness. The heat is transmitted to the fixed bush 27 from the shape of the heat dissipating fin of the distal end portion 29A rather than the peripheral surface.
Thereby, heat radiation can be suppressed from the heat sink 29 into the atmosphere of the cylindrical portion 2, and heat generation can be efficiently transmitted to the cylindrical portion 2.

As described above, the insulating sheet 28 covers the inner surface of the cylindrical portion 2, and the insulating sheet 28 is made of a material having high thermal conductivity, and is transmitted from the fixed bush 27 to the cylindrical portion 2. It does not inhibit heat.
In this way, the insulating sheet 28 has high thermal conductivity, and by providing the fixing bush 27 that is a heat conductive member that thermally connects the circuit component of the electric circuit board 8 and the insulating sheet 28, Both insulation and heat dissipation of the electric circuit board 8 can be improved.
Furthermore, as long as the predetermined insulating performance is satisfied, the insulating sheet 28 is provided with a cutout portion in which a range in which the fixed bush 27 abuts is cut, so that the fixed bush 27 is brought into direct contact with the tubular portion 2, and the insulating sheet 28 is The heat may be transmitted from the fixed bush 27 directly to the tubular portion 2 without being interposed.

  In FIG. 3, reference numeral 270 denotes a substantially rod-like insulating bush made of a rubber part made of silicon material, which is attached to the upper end portion 8 </ b> C of the electric circuit board 8 and pressed against the LED board 16 facing the insertion opening 14. By providing the insulating bushing 270 between the electric circuit board 8 and the LED board 16, the withstand voltage performance can be enhanced.

FIG. 5 is a bottom view of the LED lamp 1 with the annular waterproof packing 70 removed, and FIG. 6 is a sectional view taken along line VI-VI in FIG. 7 is a sectional view taken along line VII-VII in FIG.
As described above, the casing 35 including the cylindrical portion 2 and the base plate 13 is provided with a plurality of heat radiation fins 25 so as to improve heat dissipation.
The radiating fins 25 are each thin plate-like, and a large number of the radiating fins 25 are provided substantially radially about the axis of the cylindrical portion 2 when viewed from the back surface 13A of the base plate 13. These radiating fins 25 have fin base portions 25B, which are the base portions, connected to the back surface 13A of the base plate 13, and the radiating fins 25, the cylindrical portion 2 and the base plate 13 are molded from the above-described heat conductive resin to the mold. It is integrally formed by resin molding using Thus, by integrally molding the base plate 13 and the heat radiating fins 25, the thermal resistance between the base plate 13 and the heat radiating fins 25 is suppressed, the amount of heat transfer to the heat radiating fins 25 is increased, and high heat radiating performance is achieved. can get.

  Moreover, although the radiation fin 25 extends downward (from the base 3 side) from the back surface 13 </ b> A of the base plate 13 extending along the cylindrical portion 2, it is separated from the cylindrical portion 2 by providing a gap S. Yes. Then, two adjacent radiating fins 25 are made into one set, and the ends of the set of radiating fins 25 on the cylindrical portion 2 side are connected by a connecting portion 105, so that they are arranged in a substantially C shape. Fins (hereinafter referred to as “C-shaped fins 101”) in which the open portions of the pair of heat radiation fins 25 are closed by the connecting portions 105 are integrally formed.

According to the C-shaped fin 101, since the air flow path F is formed between the tubular portion 2 and the connecting portion 105 as shown in FIG. 5, the outer peripheral surface of the tubular portion 2 is cooled by air. The electric circuit board 8 housed inside is cooled.
In particular, as described above, since heat of the heat generating component 8X of the electric circuit board 8 is conducted to the cylindrical portion 2 through the fixing bush 27 and the heat sink 29, the cylindrical portion 2 is caused by air passing through the air flow path F. By being cooled, the electric circuit board 8 is efficiently cooled.

  In the present embodiment, two adjacent radiating fins 25 are connected by the connecting portion 105, but the ends of the three or more adjacent radiating fins 25 on the cylindrical portion 2 side may be connected by the connecting portion 105. it can.

  As shown in FIG. 5, between the above-mentioned C-shaped fin 101, which is a set of the radiation fins 25 connected by the connecting portion 105, and the other C-shaped fin 101, these C-shaped fins are provided. Distributing fins 103 are provided that distribute the airflow flowing into the cylindrical portion 2 through the gaps 101 to the C-shaped fins 101. The distribution fin 103 extends from the back surface 13 </ b> A of the base plate 13 along the tubular portion 2, and provides a gap by the separating portion 91 between the distribution fin 103 and the tubular portion 2. . By distributing the airflow passing between the C-shaped fins 101 by the distribution fins 103, the cooling unevenness on the outer peripheral surface of the cylindrical portion 2 is hardly generated, and the cooling can be performed uniformly.

  Further, as shown in FIG. 1, the distribution fin 103 is formed so that the length from the base plate 13 along the cylindrical portion 2 is shorter than the heat radiation fin 25. As a result, air can move between the C-shaped fins 101 beyond the sorting fins 103, so that the air is uniformly distributed by the sorting fins 103.

  The pair of heat radiation fins 25 facing each other between the adjacent C-shaped fins 101 are formed in parallel to each other, and the heat radiation fins 25 and The distribution fins 103 are formed in parallel.

  On the back surface 13A of the base plate 13, short radiating fins 102 are also provided between the radiating fins 25 that are connected by a connecting portion 105 to form a C-shaped fin 101, as shown in FIG. The short radiating fins 102 are shorter than the radiating fins 25 from the back surface 13 </ b> A of the base plate 13 along the cylindrical portion 2, and are formed to the same extent as the distribution fins 103. Each short heat radiating fin 102 assists the heat dissipation of the base plate 13 so that a higher-power LED 15 can be mounted, the length is shorter than that of the heat radiating fin 25, and the end on the cylindrical portion 2 side. Since the portion 102D is separated from the connecting portion 105 and the gap Sa is provided, the air flow in the C-shaped fin 101 is not hindered, and the C-shaped fin 101 responsible for the main heat dissipation is provided. The cooling performance is not hindered.

In addition, as shown in FIG. 5, an outer annular fin 106 and an inner annular fin 107 are formed on the back surface 13 </ b> A of the base plate 13 as annular annular radiation fins surrounding the cylindrical portion 2. . The outer annular fin 106 and the inner annular fin 107 are formed so that the length from the back surface 13 </ b> A of the base plate 13 along the cylindrical portion 2 is shorter than the short heat radiation fin 102. These outer annular fins 106 and inner annular fins 107 generate randomness in the airflow in the C-shaped fins 101 and between the C-shaped fins 101, thereby improving the cooling performance.
In addition, since the outer annular fin 106 and the inner annular fin 107 are short, the outer annular fin is used when the LED lamp 1 is used in a posture in which the light emitting portion 12 is located below the base 3 (so-called downward lighting). 106, the inner annular fin 107, and the space defined by the C-shaped fin 101 do not collect water or the like.

  The outer annular fin 106 is formed directly below the outer peripheral side light emitting portion 15A, and the inner annular fin 107 is formed immediately below the inner peripheral side light emitting portion 15B, and is located on the outer peripheral side of the connecting portion 105. Thus, by arranging the outer annular fin 106 and the inner annular fin 107 directly under the LED 15, the heat of the LED 15 can be efficiently radiated and the base plate 13 can be reinforced.

  In the present embodiment, as described above, in addition to the heat radiation fins 25, the short heat radiation fins 102, the distribution fins 103, the outer annular fins 106, and the inner annular fins 107 are provided on the back surface 13A of the base plate 13. ing. At this time, if each of them is lengthened, the heat dissipation performance can be improved, but if so, the weight of the housing 35 is increased. Thus, in the present embodiment, the weight of the housing 35 is suppressed by lengthening only the heat radiation fins 25 of the C-shaped fins 101 responsible for main heat radiation and shortening the others. However, since the moment applied to the fin root of the back surface 13A increases as the fin length increases, the heat radiation fin 25 is made thicker than the other fins to increase the strength.

  Here, after the resin molding of the casing 35 including the base plate 13 and the heat radiation fins 25, paint or chemicals are applied to the surface in order to improve weather resistance and designability. In this coating step, in the conventional LED lamp having a general configuration, the radiation fins 25 extend radially from the tubular portion 2, and the end of the radiation fin 25 on the base plate 13 side is the back surface 13 </ b> A of the base plate 13. Therefore, there is a problem that the corner of the joint between the cylindrical portion 2 and the heat radiating fin 25 and the base plate 13 is difficult to contain paint, and when the application amount is increased, sagging occurs on the front side of the fin. . For this reason, in the application process, it is necessary to apply a small amount of paint or the like divided into a plurality of times, which increases the number of applications and leads to an increase in cost.

  On the other hand, in the LED lamp 1 of the present embodiment, as described above, it is the base portion of the radiation fin 25 that is a connection point with the base plate 13 between all the radiation fins 25 and the cylindrical portion 2. A separation portion 91 that separates the radiation fin 25 and the tubular portion 2 is provided from the fin base portion 25 </ b> B to the fin tip 25 </ b> A, and a gap S is provided between the radiation fin 25 and the tubular portion 2.

Thereby, in the coating application process to the housing 35, no liquid pool is generated between the heat radiating fins 25 and the cylindrical portion 2, so that the amount of liquid applied per time is increased and the number of times of application is reduced. Thus, the paint can be easily applied to the housing 35 without unevenness. In particular, by spraying the paint using a spray or the like, the paint wraps around the cylindrical portion 2 through the separation portion 91, and the paint can be applied evenly over a wide range by one application.
Furthermore, by providing the separation part 91, the housing 35 can be reduced in weight and the material cost can be suppressed. Further, when the LED lamp 1 is used, rainwater or the like does not collect between the heat radiation fin 25 and the cylindrical portion 2.

  In addition to this, even in the short heat radiation fin 102 provided in the C-shaped fin 101, since the gap Sa is provided between the connecting portion 105, the uneven coating of the C-shaped fin 101 is also uneven. Can be prevented.

As shown in FIG. 1, the C-shaped fin 101 (radiating fin 25), short radiating fin 102, and sorting fin 103 are arranged from the back surface 13 </ b> A (FIG. 2) of the base plate 13 to the opening edge 66 of the holder housing 62. The fan-shaped fins 101 (radiating fins 25), the short radiating fins 102, and the distributing fins 103 extend in the axial direction of the cylindrical portion 2. The length is formed so as to gradually decrease from the inner peripheral side toward the outer peripheral side. Thus, by forming the heat radiation fins 25 and the like in a substantially fan shape when viewed from the side, when the LED lamp 1 is mounted on the lamp holder 60, it is possible to enhance the sense of unity with the lamp holder 60 and enhance the design. be able to.
As shown in FIG. 6, the fin tip 101 </ b> A of the C-shaped fin 101 is formed horizontally (perpendicular to the axis of the tubular portion 2), and the annular waterproof packing 70 attached to the tubular portion 2. The upper surface of the abuts.

  As shown in FIG. 7, the base plate 13 is formed so that its thickness gradually becomes thinner from the inner peripheral part 13 </ b> B connected to the cylindrical part 2 toward the outer peripheral part 13 </ b> C. Specifically, in the base plate 13, the mounting surface 13 </ b> D to which the LED substrate 16 is mounted is formed perpendicular to the axis of the cylindrical portion 2, and the back surface 13 </ b> A on which the heat radiating fins 25 are formed extends to the outer periphery. The taper surface becomes thinner toward the side. For this reason, as for the base plate 13, the thermal resistance to the radiation fin 25 becomes small toward the outer peripheral portion 13C side where the plate thickness is reduced. Further, since the base plate 13 is formed with a thick inner peripheral portion 13B and has high rigidity, it is possible to prevent the attachment surface 13D from warping and to improve the flatness of the attachment surface 13D.

FIG. 8 is an enlarged plan view of a part of the C-shaped fin 101.
As shown in FIG. 8, the radiating fin 25 constituting the C-shaped fin 101 includes a thick portion 110 in which the plate thickness of the fin base portion 25 </ b> B is substantially equal to the plate thickness of the connecting portion 105, and the fin base portion. The thin-walled portion 111 is formed so that the plate thickness of 25B gradually decreases from the end of the thick-walled portion 110 toward the distal end side on the outer peripheral side of the radiating fin 25. A boundary portion 110 </ b> A (FIG. 8) between the thick portion 110 and the thin portion 111 is located between the outer annular fin 106 and the inner annular fin 107.
Thus, since the plate | board thickness of fin base part 25B of the thermal radiation fin 25 which comprises the C-shaped fin 101 was formed so that plate | board thickness might become thin toward the outer peripheral side, the C-shaped fin 101 is closer to the outer peripheral side. It is lightweight.

  In the present embodiment, as described above, the C-shaped fin 101 is formed in a substantially fan shape in a side view that draws a gentle arc, and the C-shaped fin 101 extends in the axial direction of the tubular portion 2. Since the extending length is formed so as to gradually become shorter from the inner peripheral side toward the outer peripheral side, when an external force acts on the C-shaped fin 101, the fin base portion 25B of the C-shaped fin 101 is applied. Such a bending moment becomes smaller as the outer peripheral side of the C-shaped fin 101 having a shorter axial length. For this reason, the plate | board thickness of the fin base part 25B of the radiation fin 25 which comprises the square-shaped fin 101 corresponding to a bending moment can be formed thinly toward the outer peripheral side.

Further, in order to prevent sinking of the mounting surface 13D that occurs during resin molding, it is conceivable to make the base plate 13 thicker than the plate thickness of the C-shaped fin 101 at the fin base portion 25B. The thermal resistance from the base plate 13 to the C-shaped fin 101 increases. However, in the present embodiment, the base plate 13 is formed so as to be thinner toward the outer peripheral portion 13C side in correspondence with the plate thickness of the fin base portion 25B of the radiating fin 25 that is thinner toward the outer peripheral side. While improving the heat dissipation of the plate 13, it is possible to prevent sink marks during resin molding from occurring on the mounting surface 13D. By preventing the occurrence of sink marks on the mounting surface 13D, the flatness of the mounting surface 13D is improved and the adhesion between the mounting surface 13D and the LED substrate 16 is improved, so that the heat dissipation of the base plate 13 can be improved. More specifically, if a sink occurs in the fin base portion 25B of each square-shaped fin 101, a gap is formed between the mounting surface 13D and the LED board 16 at this portion, but the occurrence of sink is prevented. By doing so, attachment surface 13D and LED board 16 can be stuck, and heat dissipation can be improved.
Furthermore, since the base plate 13 and the C-shaped fin 101 are formed thinner toward the outer peripheral side, the housing 35 can be reduced in weight.
Further, since the base plate 13 and the C-shaped fin 101 are formed thinner toward the outer peripheral side, the heat dissipation on the outer peripheral side is increased, and therefore the outer peripheral side light emission that generates a larger amount of heat than the inner peripheral side light emitting unit 15B. The heat of the portion 15A can be efficiently radiated.
Even when the base plate 13 and the C-shaped fin 101 are manufactured by aluminum die casting, sinking can be suppressed by adopting the configuration of the present embodiment.

As shown in FIGS. 6-8, the thickness of the radiation fin 25, the short radiation fin 102, the distribution fin 103, the outer annular fin 106, and the inner annular fin 107 constituting the C-shaped fin 101 is the fin base portion. It is formed so as to become gradually thinner in the axial direction from 25B toward the end on the base 3 side. For this reason, the thickness of each fin acts as a taper, and the casing 35 can be easily released in the axial direction when the casing 35 is molded by a mold.
Further, the fin base portions 25B of the heat radiation fins 25, the short heat radiation fins 102, the distribution fins 103, the outer annular fins 106, and the inner annular fins 107 that constitute the C-shaped fins 101 have groove portions 115 on both sides of each fin. Is formed. The groove 115 is formed over the entire length of each fin. Since the groove 115 can narrow the shrinkage range of the resin in the vicinity of the fin base portion 25B, the range of sink marks generated on the mounting surface 13D can be reduced, and at the same time, the surface area of the base plate 13 can be increased.

  As shown in FIGS. 1 to 4, the annular waterproof packing 70 has a substantially frustoconical shape (substantially trapezoidal cross section) that is continuous with an arc drawn by the outer shape 25 </ b> D of the radiating fin 25 when viewed from the side. In addition, the contour shape composed of the heat radiation fins 25 and the annular waterproof packing 70 is formed so as to be equal to the contour shape of the glass bulb of the existing light bulb, and prevents problems caused by the difference in shape when replacing the existing light bulb. Is planned.

Here, as the material of the cylindrical portion 2, a resin material mixed with high thermal conductivity carbon fiber (hereinafter referred to as "thermal conductivity fiber") is used. In this resin material, It is known that anisotropy occurs in the thermal conductivity due to the orientation of the thermally conductive fibers.
In the present embodiment, the heat radiation capacity of the cylindrical portion 2 is increased by orienting the heat conductive fibers so that the thermal conductivity from the cylindrical portion 2 and the base plate 13 to the heat radiation fins 25 is increased. The orientation of the heat conducting fibers is controlled by the direction in which the resin flows during resin injection molding.

Next, a configuration in which the lead wires 21A and 21B are passed through the terminal end 10A of the insulating cylinder portion 10 will be described.
FIG. 9 is a plan view of the housing 35 viewed from the base plate 13 side.
As shown in FIG. 9, a pair of sandwiching portions 116, 116 are provided on the inner peripheral surface of the insulating cylinder portion 10 so as to protrude and support the edge portion of the electric circuit board 8. The sandwiching portions 116, 116 are arranged to face each other at a position slightly deviated from the center of the insulating cylinder portion 10, and the electric circuit board 8 has an orientation in which the plate surface is parallel to the axis of the insulating cylinder portion 10. Thus, it is supported at a position slightly shifted from the center of the insulating cylinder portion 10.

10 is a cross-sectional view taken along the line XX of FIG.
As shown in FIGS. 4, 9, and 10, the insulating cylinder portion 10 is closed by a bag portion 120 formed at the terminal end 10A. Specifically, the bag portion 120 includes a plate portion 121 provided so as to close the terminal end 10A inside the end face of the terminal end 10A, and a pair of protruding portions 122A in which a part of the plate portion 121 protrudes toward the eyelet 7 side. 122B. The protruding portions 122A and 122B are surrounded by a cylindrical portion 123 formed at the end of the terminal end 10A, and a portion where the protruding portions 122A and 122B are not formed inside the cylindrical portion 123 is from an end surface 123A of the cylindrical portion 123. The recess 124 is also recessed.

The protrusions 122A and 122B protrude from the end surface 123A of the cylindrical portion 123 toward the eyelet 7, and are formed so as to taper toward the tip. The end of the housing 35 on the eyelet 7 side is the tip of the protrusions 122A and 122B.
Wiring holes 125A and 125B penetrating the projecting portions 122A and 122B are formed at the leading ends of the projecting portions 122A and 122B, and the lead wires 21A and 21B extending from the electric circuit board 8 pass through the wiring holes 125A and 125B, respectively. It passes through and extends to the base 3 side. The wiring holes 125 </ b> A and 125 </ b> B are arranged on the center line of the insulating cylinder portion 10 parallel to the electric circuit board 8 in plan view. Further, an enlarged diameter portion 129 is formed at the ends of the wiring holes 125A and 125B, and the lead wires 21A and 21B are easily bent at the enlarged diameter portion 129.

On the inner surface side of the bag portion 120, the partition wall 126 is formed so that the plate portion 121 protrudes toward the light emitting portion 12 side by forming the protrusion portions 122 </ b> A and 122 </ b> B so that the center portion of the plate portion 121 remains. The partition wall 126 divides the space in the terminal end 10A having a substantially cylindrical cross section into approximately two equal parts. The partition wall 126 passes through the center of the insulating cylinder portion 10 and is arranged in a direction substantially orthogonal to the plate surface of the electric circuit board 8.
As shown in FIG. 9, the lead wires 21 </ b> A and 21 </ b> B are each drawn from a position straddling the partition wall 126 in the lower part of the electric circuit board 8.

  A pair of introducing portions 127A and 127B are formed on the inner side surfaces of the protruding portions 122A and 122B to guide the lead wires 21A and 21B to the wiring holes 125A and 125B. The introduction portions 127A and 127B are conical (funnel-shaped) depressions that taper toward the wiring holes 125A and 125B at the tip, so that the lead wires 21A and 21B can be reliably guided to the wiring holes 125A and 125B. Further, the space in the terminal end 10A is substantially divided into two by the partition wall 126 and is occupied by the introduction portions 127A and 127B, and the lead wires 21A and 21B always come into contact with the introduction portions 127A and 127B. 21A and 21B can be reliably guided to the wiring holes 125A and 125B.

  At the time of assembly, the electric circuit board 8 is inserted into the eyelet 7 side along the holding parts 116 and 116, and accordingly, the lead wires 21 </ b> A and 21 </ b> B below the electric circuit board 8 are The guide portions 127A and 127B are partitioned by the partition wall 126 and positioned below the lead wires 21A and 21B, respectively, are guided in the funnel shape of the lead portions 127A and 127B, and are reliably guided to the wiring holes 125A and 125B. .

As shown in FIG. 4, the lead wire 21 </ b> A drawn out from the wiring hole 125 </ b> A passes through the inside of the base 3 and is connected to the eyelet 7. On the other hand, the lead wire 21 </ b> B drawn out from the wiring hole 125 </ b> B is bent outward at the terminal end 10 </ b> A of the insulating tube portion 10 and extends along the outer surface of the insulating tube portion 10, and is connected to the shell 5.
As described above, since the wiring holes 125A and 125B for drawing out the lead wires 21A and 21B are provided before the lead wire 21B is bent outward, the lead wires 21A and 21B are entangled with each other, and the lead wire due to the entanglement is provided. The short circuit of 21A and 21B can be prevented. Further, by providing the introduction portions 127A and 127B, the lead wires 21A and 21B can be easily passed through the wiring holes 125A and 125B, so that the diameters of the wiring holes 125A and 125B are approximately the same as those of the wiring holes 125A and 125B. Even when the gap hardly occurs, these lead wires 21A and 21B can be easily passed.

FIG. 11 is an enlarged view of the terminal end 10 </ b> A of the insulating cylinder portion 10.
On the outer peripheral surface of the terminal end 10 </ b> A of the insulating cylinder portion 10, a screw portion 33 that engages with the inner peripheral surface of the shell 5 is formed. Further, a wiring groove 34 extending in the axial direction of the insulating cylinder portion 10 is formed on the outer peripheral surface of the terminal end 10 </ b> A, and the wiring groove 34 is provided so as to be carved into a part of the screw portion 33. A lead wire 21B that is bent from the inside of the insulating tube portion 10 and extends outward is embedded in the wiring groove 34 and extends toward the tube portion 2 side. That is, in a state where the shell 5 is attached to the insulating cylinder portion 10, the lead wire 21 </ b> B passes through the wiring groove 34 inside the shell 5 and is joined to the outer peripheral surface of the shell 5 in the vicinity of the open end of the shell 5. The end 34A of the wiring groove 34 is located on the end surface 123A of the cylindrical portion 123, and the protrusions 122A and 122B protrude outward from the end 34A of the wiring groove 34 toward the eyelet 7 side.
Further, the wiring groove 34 through which the lead wire 21B passes is connected to the inside of the insulating cylinder portion 10, and the inside of the insulating cylinder portion 10 communicates with the eyelet 7 and the cylindrical portion 2 via the wiring holes 125A and 125B. ing. For this reason, air can enter and exit the cylindrical portion 2 through the wiring groove 34 and the wiring holes 125A and 125B, thereby preventing condensation in the cylindrical portion 2.

When attaching the base 3 to the insulating cylinder portion 10, the shell 5 is caulked from the outer peripheral side of the insulating cylinder portion 10 and fixed in a state where the shell 5 is engaged with the screw portion 33 of the insulating cylinder portion 10.
A pair of caulking pilot holes 56 of the base 3 are provided on the side surface of the insulating cylinder portion 10, and the shell 5 of the base 3 is caulked at the position of the pilot hole 56 so that the shell 5 enters the pilot hole 56. Since 5 is deformed, the deformation amount of the shell 5 is increased, and the strength of the caulking portion can be increased.

When the LED lamp 1 is installed in a downward lighting state that illuminates the lower part, the bag part 120 constitutes the upper surface of the casing 35. In the present embodiment, since the bag portion 120 protrudes upward from the end surface 123A of the insulating cylinder portion 10 and the wiring holes 125A and 125B are located above the end surface 123A in the downward lighting state, Even if water enters the upper surface of the body 35 due to condensation, rain, or the like, this water can be prevented from entering the housing 35 from the wiring holes 125A and 125B. In addition, when the amount of water intrusion is large, water collects in the concave portion 124 on the upper surface portion, but since the wiring holes 125A and 125B are located above the end surface 123A, water enters the wiring holes 125A and 125B. Can be prevented.
Furthermore, since the wiring holes 125A and 125B are located above the end 34A of the wiring groove 34, even if water enters the upper surface portion of the housing 35 through the wiring groove 34, the water wiring holes 125A and 125B. Can be prevented from entering. For this reason, it is possible to prevent water from entering the housing 35 from the wiring holes 125 </ b> A and 125 </ b> B while allowing air to enter and exit the cylindrical portion 2 through the wiring groove 34 to prevent condensation in the housing 35. .

Next, the LED lamp 1 is installed at a high place and is suitable for use in a case where the LED lamp 1 is installed in a so-called downward lighting state that illuminates an irradiation object such as a signboard, a wall surface, or a room disposed vertically below. The fall prevention structure 1 will be described.
FIG. 12 is a diagram illustrating a fall prevention structure for the LED lamp 1.
As shown in FIGS. 1 to 3, 5, and 12, the LED lamp 1 includes a pair of metal pins 130 and 130 that are connected to the C-shaped fin 101, and a pair of pins that are connected to the pin 130. The LED lamp 1 is connected to a metal band 133 fixed to the lamp holder 60, so that the LED lamp 1 is connected via the fall prevention wire 131. To the lamp holder 60.
In addition, as the wire 131 for prevention of fall, if it functions as a supporting member which supports the LED lamp 1, arbitrary members of a rod shape or a string shape can be used.

As shown in FIG. 5, each pin 130 is stretched between a pair of adjacent C-shaped fins 101 with the distribution fin 103 interposed therebetween. Specifically, the pin 130 is spanned between the radiating fins 25 and 25 arranged substantially parallel to each other so as to be substantially orthogonal to the surfaces of the radiating fins 25 and 25. In this way, since the pin 130 is connected to the plurality of heat radiation fins 25, 25, the pin 130 is firmly fixed.
The radiating fins 25, 25 have support holes 134, 134 in the middle part of the radiating fins 25, 25 extending in the radial direction of the base plate 13, and both ends of the pin 130 are inserted into the support holes 134, 134. By doing so, it is attached to the radiation fins 25, 25. The pin 130 is provided at an intermediate portion in the height direction of the heat radiating fin 25 and is located below the sorting fin 103.

The pin 130 is inserted into the support hole 134 so that the flange portion 130A at one end is brought into contact with the one heat radiation fin 25, and is fixed by a fixing ring 130B fitted into the other end penetrating the support hole 134 of the other heat radiation fin 25. Fixed to the radiation fins 25, 25. In the present embodiment, since the radiating fins 25 and 25 are disposed substantially parallel to each other, the support holes 134 and 134 can be easily formed in the radiating fins 25 and 25 by machining or the like after resin molding. The support holes 134 and 134 may be formed at the time of resin molding by a punching mechanism provided in a mold for molding the housing 35. In this case as well, the radiating fins 25 and 25 are substantially parallel to each other. Thus, the support holes 134 and 134 can be easily formed.
Moreover, the pins 130 and 130 are provided in a pair so as to face each other with the cylindrical portion 2 interposed therebetween.
The fall prevention wire 131 is formed by caulking a portion formed in a ring shape by bending both ends of the wire with a caulking portion 131D, and has a pin connecting portion 131A hooked to the pin 130 at one end. A band connecting portion 131B to be connected is provided at the other end. The pin connecting portion 131A has a hook 131C that is hooked on the pin 130 at the ring-shaped portion.

13A and 13B are diagrams showing the band 133, where FIG. 13A is a plan view, and FIG. 13B is a perspective view showing a state in which a fall prevention wire 131 is attached.
As shown in FIG. 13, the band 133 includes a C-shaped ring portion 135 formed by bending a belt-shaped plate into an annular shape, an adjusting portion 136 provided at an open end of the C-shaped ring portion 135, and a C-shaped ring. And a pair of wire connecting portions 137 and 137 formed to protrude from the outer peripheral surface of the portion 135.
The adjusting portion 136 includes a nut portion 136A formed at one end of the C-shaped ring portion 135, a hole portion 136B formed at the other end of the C-shaped ring portion 135, and a bolt 136C screwed to the nut portion 136A. Have. The band 133 can change the diameter of the C-shaped ring part 135 by tightening the bolt 136C inserted through the hole 136B into the nut part 136A, thereby adjusting the binding force of the band 133 to the lamp holder 60. can do.

  The wire connecting portions 137 and 137 are formed with holes 137A to which the band connecting portion 131B of the fall preventing wire 131 is connected, respectively, and the fall preventing wire 131 rotates around the wire connecting portions 137 and 137. Is possible. The wire connecting portions 137 and 137 are provided at positions facing each other corresponding to the pins 130 and 130. The wire connecting portions 137 and 137 are provided at positions where the drop preventing wires 131 are substantially parallel to the axis of the LED lamp 1 in a state where the drop preventing wires 131 are connected to the pins 130.

  The band 133 is wound around and fixed to a band winding portion 60C provided on the outer peripheral surface near the tip 60B of the lamp holder 60. A step portion 60D that protrudes outward is formed on the front end 60B side of the band winding portion 60C, and when the band 133 moves in a direction to come out of the lamp holder 60, the band portion 60D abuts on the band 60D. 133 is retained in the axial direction of the lamp holder 60.

When the LED lamp 1 is attached to the lamp holder 60, first, the hook 131 </ b> C of each fall prevention wire 131 is connected to the pins 130, 130 of the LED lamp 1 to connect the band 133 to the LED lamp 1. Next, the LED lamp 1 is inserted into the lamp holder 60 from the base 3 side while passing through the lamp holder 60 in a state where the band 133 is expanded, and the band 133 is temporarily fixed to the band winding portion 60 </ b> C of the lamp holder 60. In this state, the band 133 is loosened by the adjusting portion 136, can rotate on the outer peripheral surface of the lamp holder 60, and has a diameter that does not come off the lamp holder 60.
Next, the base 3 of the LED lamp 1 is screwed into the socket 65 by rotating the LED lamp 1. At this time, the band 133 rotates together with the LED lamp 1. Thus, since the LED lamp 1 is screwed in a state where the LED lamp 1 is connected to the lamp holder 60 via the fall prevention wire 131 and the band 133, when the LED lamp 1 is attached to the lamp holder 60, It can suppress that the LED lamp 1 falls. Moreover, also when removing the LED lamp 1 from the lamp holder 60, the fall of the LED lamp 1 can be suppressed by rotating the LED lamp 1 with the band 133 loosened.

  After the LED lamp 1 is screwed into the socket 65, the band 133 is completely tightened by the adjusting unit 136, thereby fixing the band 133 at a predetermined position of the band winding unit 60 </ b> C of the lamp holder 60. Thereby, the LED lamp 1 is fixed to the lamp holder 60 via the pair of fall prevention wires 131 and 131, and is prevented from dropping. That is, even if the engagement between the base 3 and the socket 65 is released for some reason, the LED lamp 1 is fixed to the lamp holder 60 by the fall prevention wires 131 and 131, so that the fall is prevented.

Further, by adjusting the position at which the band 133 is fixed, the tension for compressing the annular waterproof packing 70 between the C-shaped fin 101 and the tip 60 </ b> B of the lamp holder 60 is applied to the fall prevention wires 131 and 131. Is granted. For this reason, even if a vibration acts, it can prevent that a clearance gap is made between the annular waterproof packing 70 and the lamp holder 60, and can improve waterproofness.
Furthermore, the weight of the LED lamp 1 is shared by the fall prevention wires 131 and 131 and the socket 65, and the load acting on the socket 65 is reduced. It can be prevented from being deformed or damaged.
Further, since the LED lamp 1 is supported by the fall-preventing wires 131 and 131 facing each other with the cylindrical portion 2 interposed therebetween, even if the engagement between the base 3 and the socket 65 is released, the LED lamp 1 is attached to the lamp holder 60. Can be prevented from coming off. For example, when the LED lamp 1 is supported by only one fall prevention wire 131, the LED lamp 1 can be prevented from falling, but the fall prevention wire 131 and the LED lamp 1 rotate around the pin 130. Then, it is conceivable that the LED lamp 1 is detached from the lamp holder 60.
In the present embodiment, the fall prevention wire 131 is described as being provided in a pair. However, only one fall prevention wire 131 is provided according to the weight of the LED lamp 1 or an assumed load. The LED lamp 1 may be supported by a single fall prevention wire 131.

Moreover, in this embodiment, although demonstrated as an example the pin 130 spanned between the two radiation fins 25 and 25 as a connection member, this invention is not limited to this, A connection member May be configured to span between two or more radiating fins 25. For example, a ring-shaped connecting member that goes around the cylindrical portion 2 and is inserted into the support holes 134 provided in all (12) radiating fins 25 is provided, and the fall prevention wire 131 is attached to the connecting member. You may connect.
Further, a string-like wire may be used for the connecting member instead of the rod-like pin 130.

  Further, the configuration is not limited to the configuration in which the fall prevention wire 131 is attached to the lamp holder 60 using the band 133, but one end side of the string-like fall prevention wire 131 is fixed around the lamp holder 60 and the other end is fixed to the LED. It may be fixed to the pin 130 of the lamp 1 to prevent the fall.

  Here, since the LED lamp 1 is heavier than a normal incandescent bulb or the like, the load on the socket 65 and the base 3 is increased. For this reason, when the LED lamp 1 is mounted on a lamp holder 60 having an existing socket 65 designed for an incandescent light bulb, vibrations from, for example, a car traveling on a road are applied, and the influence is affected by the socket 65 or When accumulated in the base 3, the socket 65, the base 3, and the like are damaged, and the possibility of falling off the lamp holder 60 increases.

In the present embodiment, as described above, the two fall prevention wires 131 extending from the lamp holder 60 are connected to the two locations of the pins 130 and 130 of the LED lamp 1, so that the LED lamp 1 is dropped from the socket 65. Even so, dropping from the lamp holder 60 is prevented.
However, as described above, since the LED lamp 1 is heavier than a heat-generating bulb or the like, if the LED lamp 1 falls off from the socket 65 and is greatly shaken when the LED lamp 1 is suspended in the air by the fall prevention wire 131, For example, there is a possibility that a large impact is received by colliding with an object to be irradiated such as a signboard and the damage is caused by the impact.
Therefore, in the present embodiment, in order to suppress the swing width of the LED lamp 1 when the LED lamp 1 is dropped from the socket 65, the support hole 134 for supporting the pin 130 is provided between the light emitting portion 12 and the base 3 with its own gravity center of gravity. It is set as the structure provided in the position near the nozzle | cap | die 3 from the position Gx.

FIG. 14 is a diagram schematically showing the positional relationship between the gravity center position Gx of the LED lamp 1 and the support hole 134, FIG. 14 (A) shows the installation state, and FIG. 14 (B) shows the falling state. .
The own weight gravity center position Gx is the gravity center position of the own weight of the LED lamp 1. However, as the own weight of the LED lamp 1, when there is an accessory that is attached to the LED lamp 1, such as the annular waterproof packing 70, for example, when the LED lamp 1 is removed from the socket 65, the weight including the accessory is included. Is used under its own weight.

When the LED lamp 1 is used in the downward lighting state, as shown in FIG. 14A, the LED lamp 1 is oriented so that the light emitting portion 12 faces vertically downward and the base 3 is positioned vertically above the light emitting portion 12. The base 3 is attached to the socket 65 and installed.
In this installed state, as shown in FIG. 14B, when the base 3 is removed from the socket 65, the LED lamp 1 has its own gravity center of gravity position Gx directly below the support hole 134 to which the fall prevention wire 131 is connected. The support hole 134 is pivoted so as to be positioned.
In the LED lamp 1 of the present embodiment, the support hole 134 is provided at a position closer to the base 3 than the gravity center position Gx of the own weight. In the installed state, the gravity center position Gx of the own weight is already vertically below the support hole 134. Therefore, the rotation of the LED lamp 1 at the time of dropping is about the horizontal displacement between the gravity center position Gx of the own weight and the support hole 134, and the swing width of the LED lamp 1 accompanying this rotation can be kept relatively small. .

  On the other hand, as shown in FIG. 15A, in the case of the LED lamp 1 of the reference configuration in which the support hole 134 is disposed at a position closer to the light emitting unit 12 than the gravity center position Gx, the base 3 is removed from the socket 65. As shown in FIG. 15 (B), the center of gravity Gx located on the vertical upper side of the support hole 134 is pivoted about the support hole 134 so that the gravity center position Gx moves directly below the support hole 134. With this rotation, the swing width of the LED lamp 1 becomes relatively large.

That is, as in this embodiment, by providing the support hole 134 at a position closer to the base 3 than the gravity center position Gx, the amount of rotation of the LED lamp 1 when the base 3 is removed from the socket 65 can be reduced. Therefore, the swing width of the LED lamp 1 can be kept relatively small.
As a result, even if the LED lamp 1 loosens and falls out of the socket 65 and falls off, the swinging width at the time of dropping is small, so collision with an irradiated object such as a signboard is avoided and even if it collides, Since the impact can be suppressed, the LED lamp 1 can be prevented from being damaged.

  As described above, since the impact applied to the support hole 134 is suppressed, the housing 35 of the LED lamp 1 is made of a resin material whose strength is lower than that of a metal material. Even when the connecting portion (the support hole 134 in the present embodiment) of the fall prevention wire 131 is integrally formed, the connecting portion can be prevented from being damaged.

Further, in the present embodiment, when the support holes 134 are provided in the heat radiating fins 25, the light emitting portion is located more than the support holes 134 so that the support holes 134 are located closer to the base 3 than the gravity center position Gx. The weight balance is designed so that the gravity center position Gx is located on the 12th side.
As a result, the support holes 134 can be provided in the radiation fins 25. When the LED lamp 1 is mounted on the lamp holder 60 and used, the support holes 134 do not enter the lamp holder 60 and fall. The prevention wire 131 can be easily connected.

In the present embodiment, the support hole 134 provided in the radiating fin 25 is exemplified as the connection portion of the fall prevention wire 131. However, the present invention is not limited to this, and any structure may be used as long as the fall prevention wire 131 can be connected. The following structure can be used.
Further, as the fall prevention wire 131, any rod-like or string-like member may be used as long as it is a support member that supports the LED lamp 1 with one end connected and fixed to a stable location such as a building or the lamp holder 60. it can.

Next, a structure for attaching the globe 22 to the base plate 13 will be described.
As the mounting structure of the globe 22, a screwing structure that is screwed onto the base plate 13 is generally used. However, in the screwed structure, since the globe 22 rotates many times when the globe 22 is attached, there is a problem that distortion due to the kinking of the O-ring 26 is caused by this rotation, and the sealing performance is lowered.
Therefore, in this embodiment, the mounting structure of the globe 22 is not a screwed structure, but an engagement structure of a protrusion and a groove, so that distortion of the O-ring 26 accompanying the mounting of the globe 22 is suppressed.

FIG. 16 is a cross-sectional view of the base plate 13.
As shown in FIG. 16 and FIG. 1, the base plate 13 is formed in a tray shape having a side wall 19, and the stepped portion 200 of one step is formed on the inner peripheral surface of the side wall 19 over the entire circumference. Is formed. The step portion 200 is formed thicker by protruding the lower end 19B side of the side wall 19 to the inner side than the upper end 19A side, and the lower step peripheral surface 200A that is the peripheral surface on the lower end 19B side of the step portion 200 is A plurality of guide holding grooves 201 are formed.
On the other hand, as shown in FIG. 3, the globe 22 has an edge portion 22A extending vertically in a substantially cylindrical shape, and a plurality of protrusions 202 protruding outward are provided on the outer peripheral surface of the edge portion 22A. . When attaching the globe 22 to the base plate 13, the protrusion 202 of the edge 22 </ b> A of the globe 22 is engaged with and held in the guide holding groove 201 of the side wall 19 of the base plate 13.

More specifically, as shown in FIG. 16, the guide holding groove 201 includes an introduction groove 201A and a holding groove 201B. The introduction groove 201A is a groove for introducing the protrusion 202 of the globe 22 from the upper end 19A side, and is formed by providing a vertical groove on the lower peripheral surface 200A of the step portion 200. The holding groove 201B is a lateral groove that is continuous with the introduction groove 201A and extends in the circumferential direction Xs while being gently inclined downward.
When the projection 202 of the globe 22 is introduced into the introduction groove 201A of the guide holding groove 201 and introduced into the guide holding groove 201, and the globe 22 is rotated, the projection 202 is gently guided downward along the holding groove 201B. Thus, the globe 22 is pushed into the base plate 13 side.

  As shown in FIG. 17, a flange 203 is formed on the edge 22 </ b> A of the globe 22 above the protrusion 202. When the protrusion 202 of the globe 22 is guided by the guide holding groove 201 and pushed into the base plate 13. The flange 203 comes into contact with the upper end 19A of the side wall 19 and cannot be pushed in, so that the globe 22 is held by the base plate 13.

In addition, as described above, an O-ring 26 is provided between the globe 22 and the base plate 13 as an example of a seal member that prevents water from entering through the gap between them. The O-ring 26 is attached not to the step portion 200 of the base plate 13 but to the outer peripheral surface of the edge portion 22A of the globe 22 (the surface facing the side wall 19). Specifically, an O-ring engagement protrusion 204 is provided below the flange 203 of the globe 22 over the entire circumference of the edge portion 22A. The flange 203 and the O-ring engagement protrusion 204 form an O-ring insertion groove 205, and the O-ring 26 is fitted and attached to the O-ring insertion groove 205.
The O-ring 26 mounted in the O-ring insertion groove 205 is pressed between the inner peripheral surface of the side wall 19 of the base plate 13 and the O-ring insertion groove 205 when the globe 22 is attached to the base plate 13. The gap between the globe 22 and the base plate 13 is sealed.
Moreover, in this embodiment, although illustration is abbreviate | omitted, a caulking agent is inject | poured over the perimeter between the O ring 26 and the side wall 19 of the base board 13, and the double seal structure is comprised. Moreover, by introducing the caulking agent, the introduction groove 201A of the guide holding groove 201 is sealed, and the hole formed in the stepped portion 200 is closed by the introduction groove 201A in a top view. Thereby, even if the globe 22 is loosened, the introduction groove 201A that is the exit of the projection 202 is blocked, so that the globe 22 can be prevented from falling.

Now, in such a seal structure, when the globe 22 is attached to the base plate 13 while rotating, the O-ring 26 is rubbed by the side wall 19 of the base plate 13, so that the rotation amount when attaching the globe 22 is large. As a result, the O-ring 26 is liable to be distorted due to rubbing from the side wall 19.
Therefore, in this embodiment, as shown in FIG. 16, the length Lh extending in the circumferential direction Xs of the holding groove 201B of the guide holding groove 201 is smaller than the entire circumference of the lower stage circumferential surface 200A, at least shorter than the half circumference, Preferably, the rotation angle when the globe 22 is rotated by the guide of the holding groove 201B is 30 degrees. Thereby, compared with the structure in which the globe 22 is attached by screwing, the rotation amount when attaching the globe 22 can be limited to the length Lh in the circumferential direction Xs of the holding groove 201B, so that the distortion of the O-ring 26 is reduced. A decrease in waterproof performance can be prevented.

FIG. 18 is a reference configuration diagram of a structure in which the globe 22 is attached to the base plate 13 by screwing.
As shown in this figure, the glove 22 has a screwing structure in which a stepped portion 200 is formed on the side wall 19 of the base plate 13, and a screw groove 210 is formed on the lower peripheral surface 200 </ b> A of the stepped portion 200. There may be a structure in which the edge portion 22A is screwed. Further, as a sealing structure using the O-ring 26, as shown in the figure, a structure in which the O-ring 26 is placed on the upper end surface 200B of the stepped portion 200 and pressed by the flange 203 of the globe 22 to be sealed can be considered. .

However, since the O-ring 26 is sandwiched between the step portion 200 of the globe 22 and the base plate 13, when the glove 22 is loosely screwed and slightly moves upward with respect to the base plate 13, the O The pressing force of the ring 26 is weakened and the waterproof performance is deteriorated.
On the other hand, in this embodiment, since the O-ring 26 is sandwiched between the O-ring fitting groove 205 of the edge 22 </ b> A of the globe 22 and the side wall 19 of the base plate 13, the globe 22 is attached to the base plate 13. Even if it moves upward, the gap between the O-ring fitting groove 205 of the edge 22A of the globe 22 and the side wall 19 of the base plate 13 does not change greatly, and the pressing force of the O-ring 26 is maintained. The sealing performance is not weakened.

  Further, although the strength of the protrusion 202 of the globe 22 is inferior to that of the screw thread in the screwed structure of FIG. 18, in the mounted state of the globe 22, the repulsive force by the O-ring 26 is the O of the edge 22 </ b> A of the globe 22. Since it acts between the ring fitting groove 205 and the side wall 19 of the base plate 13 and does not act in the direction of pushing up the flange 203 of the globe 22 from the stepped portion 200 of the side wall 19, the repulsive force of the O-ring 26 is the protrusion 202. Damage can be prevented without any load.

Further, in the screwed structure of FIG. 18, since the screw groove 210 is provided in the lower circumferential surface 200A, the lower circumferential surface 200A protrudes inward by the amount of the thread 210A of the screw groove 210, and the thickness of the side wall 19 increases. End up. In addition, in order to maintain the strength of each groove of the screw groove 210, it is necessary to increase the thickness direction between the grooves by increasing the height direction of the screw thread 210A, so that the height of the side wall 19 is also increased.
Thus, in the screwed structure, the side wall 19 is thicker and higher, so that the volume is increased, the weight of the housing 35 is increased, and the weight difference from the conventional glass bulb lamp is increased. Moreover, since the side wall 19 is high, the light shielding amount of the light 212 radiated from the LED 15 is increased, leading to a decrease in instrument efficiency.

On the other hand, in this embodiment, since it is not necessary to provide the screw groove 210 in the side wall 19, the thickness and height of the side wall 19 can be suppressed, the weight of the housing 35 can be reduced, and the light of the LED 15 can be reduced. The light shielding amount is also reduced, and the efficiency of the appliance is increased.
Moreover, as shown in the above-mentioned FIG. 17, in this embodiment, the reflective surface 215 is provided in the inner peripheral surface of the edge part 22A of the globe 22, By reflecting the light 212 which injects into the side wall 19 from LED15, Furthermore, the instrument efficiency is increased.

  In the present embodiment, the O-ring 26 is used as a seal member that seals between the globe 22 and the base plate 13, but a packing member or the like having another shape may be used as the seal member.

Incidentally, the LED lamp 1 of the present embodiment can be used not only by being mounted on the lamp holder 60 shown in FIG. 1 but also by being mounted on the exposed socket 65. When the socket 65 is installed outdoors, in order to prevent water from entering the socket 65, the socket 65 and the base 3 are attached with a substantially cylindrical waterproof packing 230 as shown in FIG. The portion Bx is covered to prevent water from entering from the opening 65A of the socket 65.
Further, the waterproof packing 230 is flexible and has a function of preventing the falling off by connecting the LED lamp 1 to the socket 65 since the tubular portion 2 of the LED lamp 1 and the socket 65 are fastened. In particular, the waterproof packing 230 of the present embodiment has a reduced diameter so that the socket mounting body 238 which is the body portion on the side mounted on the socket 65 is firmly tightened, so that the waterproof packing 230 is connected to the socket. 65 is firmly connected.

  However, the outer peripheral surface of the tubular portion 2 of the LED lamp 1 is formed in a tapered surface shape that narrows toward the base 3. Therefore, if no measures are taken, there is a problem that when the screwing of the LED lamp 1 and the socket 65 starts to loosen, the tight contact between the waterproof packing 230 and the tubular portion 2 of the LED lamp 1 is deteriorated and the waterproof property is deteriorated. is there. Furthermore, when the LED lamp 1 and the socket 65 begin to loosen, the tightness of the tubular portion 2 of the LED lamp 1 by the waterproof packing 230 is also weakened, so that the function of preventing the LED lamp 1 from dropping from the socket 65 is weakened. .

In particular, since the LED lamp 1 has a relatively high output and is suitable for use in outdoor signboard lighting and light-up lighting, the LED lamp 1 is susceptible to vibrations from automobiles traveling on nearby roads. The screwing of the LED lamp 1 and the socket 65 may start to loosen.
Further, when the object to be irradiated is illuminated from above by placing the base 3 above the light emitting unit 12 at a position higher than the irradiation target such as a signboard, the socket by the weight of the LED lamp 1 is used. Since force is always applied in the direction of dropping from 65, once it begins to loosen, it may fall off as it is.

Therefore, in the present embodiment, as shown in FIG. 19, the upper edge portion 230 </ b> A of the waterproof packing 230 is engaged over the entire circumference at a position above the base 3 on the outer peripheral surface of the cylindrical portion 2. A convex portion 232 as an engaging structure portion to be provided is provided, and a concave portion 234 that engages with the convex portion 232 is provided on the inner peripheral surface of the upper edge portion 230A of the waterproof packing 230 over the entire circumference.
Thereby, even if the screwing of the LED lamp 1 and the socket 65 is loosened, the upper edge portion 230A of the waterproof packing 230 continues to be engaged with the convex portion 232 as the engaging structure portion, so that the waterproof property is deteriorated. There is no. Further, in order for the LED lamp 1 to fall off from the socket 65, the convex portion 232 of the tubular portion 2 has to get over the concave portion 234 of the upper edge portion 230A of the waterproof packing 230, so that the function of suppressing the fall off of the LED lamp 1 is also obtained. to continue.

In addition to this, since the convex portion 232 of the cylindrical portion 2 and the concave portion 234 of the waterproof packing 230 are engaged with each other, a sealing property due to the engagement of the concave and convex portions is obtained, and from the upper edge portion 230A of the waterproof packing 230 Infiltration of water can be suppressed.
Furthermore, a plurality of convex portions 236 are provided on the inner peripheral surface of the waterproof packing 230 over the entire circumference, and these convex portions 236 also enhance the sealing performance, and the waterproof packing 230 and the cylindrical portion. By further increasing the frictional force between the two, a further drop-off suppressing effect can be obtained.

In addition, it is good also as a structure which provides a recessed part as an engaging structure part in the cylindrical part 2 instead of the convex part 232, provides a convex part in the upper edge part 230A of the waterproof packing 230, and engages these.
In addition, when the LED lamp 1 is used indoors, it is not always necessary to use a waterproof packing like the waterproof packing 230, and the LED lamp 1 is attached to the cylindrical portion 2 of the LED lamp 1 and tightens the cylindrical portion 2. Any member can be used as long as it is a tubular member and has a structure for fastening the tubular portion 2 to the socket 65.

  As described above, according to the present embodiment, the following effects can be obtained.

That is, according to the present embodiment, the O-ring 26 is provided on the outer peripheral surface of the edge portion 22A of the globe 22 while being provided with the O-ring 26 that is pressed with the side wall 19 of the base plate 13 over the entire circumference. A guide holding groove 201 is provided on the inner peripheral surface of the side wall 19 of the base plate 13 so as to introduce the protrusion 202 of the globe 22 from the upper end 19A side and guide it in the circumferential direction to hold the globe. It was set as the structure provided.
With this configuration, the rotation amount when attaching the globe 22 can be suppressed to the guide amount in the circumferential direction by the guide holding groove 201 as compared with the structure in which the globe is attached by screwing in particular, thereby reducing distortion of the seal member when attaching the globe. , Can prevent the deterioration of waterproof performance.

Further, according to the present embodiment, the O-ring 26 is fitted into the O-ring fitting groove 205 provided over the entire circumference on the outer circumferential surface of the edge 22 </ b> A of the globe 22, and the inner circumferential surface of the side wall 19 of the base plate 13. The O-ring 26 is pressed between the O-ring fitting groove 205 and sealed.
According to this configuration, even if the globe 22 moves upward with respect to the base plate 13, there is a large change in the gap between the O-ring fitting groove 205 of the edge 22 </ b> A of the globe 22 and the side wall 19 of the base plate 13. Since the pressing force of the O-ring 26 is maintained, the sealing performance is not weakened.
Further, the repulsive force by the O-ring 26 acts between the O-ring fitting groove 205 of the edge 22 </ b> A of the globe 22 and the side wall 19 of the base plate 13 to push up the flange 203 of the globe 22 from the stepped portion 200 of the side wall 19. Since it does not act in the direction, the repulsive force of the O-ring 26 does not become a load on the protrusion 202, and damage can be prevented.

  Further, according to the present embodiment, the reflection surface 215 that reflects the light 212 incident on the side wall 19 from the LED 15 is provided on the inner peripheral surface of the edge 22A of the globe 22, so that the light blocked by the side wall 19 is illuminated. The efficiency of the equipment can be increased.

  In addition, according to the present embodiment, the cylindrical shape is formed on the back surface 13A of the base plate 13 on which the LED board 16 on which the LEDs 15 are mounted is placed, with the cylindrical portion 2 and the gap S spaced apart from each other radially. A plurality of radiating fins 25 extending along the portion 2 are provided, the ends of the two adjacent radiating fins 25 on the cylindrical portion 2 side are connected, and an air flow path F is formed between the cylindrical portions 2 The portion 105 is provided. Thereby, the outer peripheral surface of the cylindrical part 2 can be air-cooled by the air passing through the air flow path F, and the electric circuit board 8 housed in the cylindrical part can be cooled.

  In particular, since the heat conducting member 29D for transferring the heat of the heat generating component 8X to the cylindrical portion 2 is provided between the heat generating component 8X of the electric circuit board 8 and the cylindrical portion 2, the heat generating component 8X of the electric circuit substrate 8 is provided. The heat can be efficiently cooled and the circuit can be operated stably.

Further, according to the present embodiment, an air current is formed between each of the C-shaped fins 101, which is a set of the radiating fins 25 connected by the connecting portion 105, and the other C-shaped fins 101. The distribution fins 103 that are divided into the fins 101 are provided.
According to this configuration, since the airflow passing between the C-shaped fins 101 is distributed by the distribution fins 103, uneven cooling on the outer peripheral surface of the tubular portion 2 is less likely to occur, and uniform cooling can be achieved.

In addition, according to the present embodiment, the short radiating fin 102 whose length from the back surface 13A of the base plate 13 is shorter than the radiating fin 25 is provided between the radiating fins 25 constituting the C-shaped fin 101. did.
According to this configuration, the heat dissipation of the base plate 13 is assisted, the LED 15 with higher output can be mounted, and the length is shorter than the heat radiation fins 25. This prevents the air flow from being hindered and does not hinder the cooling performance of the C-shaped fins 101 that mainly perform heat dissipation.

Further, according to the present embodiment, the back surface 13A of the base plate 13 has a length from the back surface 13A shorter than that of the short heat radiation fin 102, and as a plurality of annular annular heat radiation fins surrounding the cylindrical portion 2. The outer annular fin 106 and the inner annular fin 107 are provided.
According to this configuration, the outer annular fin 106 and the inner annular fin 107 cause randomness in the airflow in the C-shaped fins 101 or between the C-shaped fins 101, and the residence time becomes longer. The cooling performance is improved.

  According to the embodiment, the base plate 13 to which the LED 15 is attached and the plurality of heat radiation fins 25 formed on the back surface 13A of the base plate 13 are integrally formed of resin, and the thickness of the base plate 13 and the heat radiation fins 25 is determined based on the thickness. By forming the plate 13 so as to be gradually thinner from the inner periphery toward the outer periphery, the heat dissipating fins 25 are also thickened on the thick base plate 13 on the inner peripheral side, and the heat dissipating fins 25 are also thin on the thin base plate 13 on the outer peripheral side. Therefore, it is possible to suppress the occurrence of resin sink at the fin base portion 25B of the heat dissipating fin 25 on the back surface 13A of the base plate 13, and to improve the flatness of the base plate 13 and efficiently radiate heat. In addition, on the inner peripheral side of the base plate 13, the strength of the heat radiating fin 25 can be secured by the thick base plate 13 and the thick radiating fin 25, and on the outer peripheral side, the thin base plate 13 and the thin radiating fin 25 can secure the strength. Heat dissipation can be improved.

Further, according to the present embodiment, the LEDs 15 are attached more to the outer peripheral side light emitting portion 15A on the outer peripheral side than the inner peripheral side light emitting portion 15B on the inner peripheral side of the base plate 13, and the heat generation amount on the outer peripheral side is large. However, since the base plate 13 on the outer peripheral side and the base plate 13 are formed thin and the thermal resistance on the outer peripheral side of the base plate 13 is small, heat can be efficiently radiated.
In addition, according to the present embodiment, the axial length of the radiating fin 25 is formed so as to be gradually reduced from the inner periphery to the outer periphery of the base plate 13, and therefore the bending moment acting on the radiating fin 25 is Although the inner peripheral side of the plate 13 is larger and the outer peripheral side is smaller, the thickness of the base plate 13 and the heat radiating fins 25 is formed so as to gradually become thinner from the inner periphery toward the outer periphery. Since the thickness can be reduced, both the strength and heat dissipation of the radiation fin 25 can be achieved.
Furthermore, according to the present embodiment, the thickness of the radiating fin 25 is formed so as to gradually become thinner from the back surface 13A of the base plate 13 toward the base 3 side, so that the slope of the radiating fin 25 is a taper when the mold is released. And the resin molding of the base plate 13 and the heat radiating fins 25 becomes easy.

  Further, according to the present embodiment, the tip of the insulating cylinder portion 10 provided with the base 3 to which the lead wires 21A and 21B extending from the LED 15 are connected is the bag portion 120, and the base 3 is locked to the outer periphery of the tip. A wiring that includes a terminal end 10A having a threaded portion 33, protrudes the bag portion 120 at the tip outwardly from the end surface 123A of the terminal end 10A, and leads the lead wires 21A and 21B through the protruding portions 122A and 122B of the bag portion 120. Since the holes 125A and 125B are provided, even if water such as condensation adheres to the vicinity of the terminal end 10A, the water hardly enters the wiring holes 125A and 125B of the protrusions 122A and 122B protruding outward from the end surface 123A. Therefore, it is possible to prevent water from entering the housing 35 of the LED lamp 1 from the wiring holes 125A and 125B.

  Further, according to the present embodiment, the inner surface of the bag portion 120 is formed with a pair of introduction portions 127A and 127B that guide the pair of lead wires 21A and 21B to the wiring holes 125A and 125B. The introduction portions 127A and 127B Since the inner surface of the bag part 120 is partitioned by a partition wall 126 that divides the bag part 120 into two parts, the introduction parts 127A and 127B are formed by a pair of introduction parts 127A and 127B that are formed by dividing the inner surface of the bag part 120 by the partition wall 126 into two parts. The corresponding wiring holes 125A and 125B can be reliably guided, and the assembly of the lead wires 21A and 21B can be improved.

In addition, according to the present embodiment, since the introduction portions 127A and 127B are conical depressions that taper toward the wiring holes 125A and 125B, the lead wires 21A and 21B can be easily arranged along the conical shape. Can be passed through the wiring holes 125A and 125B.
Further, a wiring groove 34 into which the lead wire 21B drawn out through the wiring hole 125B is fitted is formed on the outer peripheral surface of the terminal end 10A, and the bag portion 120 protrudes outwardly from the wiring groove 34. Therefore, it is possible to prevent water near the wiring groove 34 from entering the housing 35 of the LED lamp 1 from the wiring holes 125A and 125B of the bag portion 120.

  Further, according to the present embodiment, the plurality of heat radiation fins 25 formed on the base plate 13 are provided, the pin 130 is spanned between the two heat radiation fins 25, 25, and the fall prevention wire 131 is connected to the pin 130. Therefore, the fall prevention wire 131 can be connected with a simple structure in which the pin 130 is spanned between the radiation fins 25, 25, and the pin 130 is provided between the two radiation fins 25, 25. The heat radiation fins 25 can be provided, and the LED lamp 1 can be reliably prevented from falling. Further, there is no need to provide a dedicated member for fixing the pin 130.

  Further, according to the present embodiment, the heat radiation fins 25, 25 over which the pin 130 is spanned are provided substantially parallel to each other, and the pin 130 is supported by the support holes 134, 134 formed in the substantially parallel heat radiation fins 25, 25. Since the support holes 134 and 134 can be easily formed in the substantially parallel radiating fins 25 and 25, the pin 130 can be easily provided in the radiating fins 25 and 25.

In addition, according to the present embodiment, the fall prevention wire 131 is connected to the band 133 wound around the outer peripheral surface of the lamp holder 60 that supports the LED lamp 1, so that the band 133 is wound around the outer peripheral surface of the lamp holder 60. Thus, the LED lamp 1 can be prevented from falling with a simple configuration in which the fall preventing wire 131 is connected to the band 133. Further, since the band 133 is wound around the lamp holder 60, it is possible to deal with lamp holders having various shapes.
Further, the LED lamp 1 is rotated and screwed into the socket 65 of the lamp holder 60, and the band 133 has an adjusting portion 136 that can adjust the binding force of the band 133, so that the binding force is loosened. Since the band 133 is rotatable on the outer peripheral surface of the lamp holder 60, the fall preventing wire 131 is connected and the band 133 is slightly loosened to be rotatable on the outer peripheral surface of the lamp holder 60. Since the LED lamp 1 can be rotated in the state and the LED lamp 1 can be attached / detached, the LED lamp 1 can be prevented from dropping during the attachment / detachment work.

Moreover, according to this embodiment, the engagement structure which has the structure engaged with the waterproof packing 230 which is a cylindrical member which has the function which connects the cylindrical part 2 to the socket 65 in the outer peripheral surface of the cylindrical part 2. It was set as the structure provided with the convex part 232 as a part.
Thereby, even if the screwing of the LED lamp 1 and the socket 65 is loosened, the upper edge portion 230A of the waterproof packing 230 continues to be engaged with the convex portion 232 that is the waterproof packing engaging portion, so that the waterproof property is deteriorated. In addition, the effect of preventing the LED lamp 1 from falling off is not impaired by the engagement between the upper edge portion 230A of the waterproof packing 230 and the convex portion 232 which is the waterproof packing engaging portion.

  Further, according to the present embodiment, the waterproof packing engaging portion is configured by the convex portion 232 that engages with the upper edge portion 230 </ b> A of the waterproof packing 230 over the entire circumference of the cylindrical portion 2. Sealing performance is obtained by the engagement of the portion 232 and the waterproof packing 230, and water intrusion from the upper edge portion 230 </ b> A of the waterproof packing 230 can be suppressed.

  Moreover, according to this embodiment, since it was set as the structure which has the convex part 236 over a perimeter on the internal peripheral surface of the waterproof packing 230, waterproofness can be improved more.

Further, according to the present embodiment, the support hole 134 as a connecting portion to which the fall prevention wire 131 is connected is provided between the light emitting portion 12 and the base 3 at a position closer to the base 3 than the gravity center position Gx. did.
With this configuration, even when the LED lamp 1 is dropped from the socket 65 in a state in which the base 3 is arranged vertically above the light emitting unit 12 and the LED lamp 1 is mounted on the socket 65 so as to illuminate the lower part, the support hole 134 is removed. Since the gravity center position Gx of the self-weight is already vertically lower than that, the amount of rotation of the LED lamp 1 due to dropping can be reduced, and the swing width of the LED lamp 1 due to the rotation can be reduced. For example, it is possible to avoid collision of the irradiated object with a signboard or the like, and even if it collides, the impact at that time can be suppressed.

  In the present embodiment, since the support holes 134 are provided in the radiating fins 25, when the LED lamp 1 is mounted on the lamp holder 60 and used, the support holes 134 do not enter the lamp holder 60 and fall. The prevention wire 131 can be easily connected.

  The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

1 LED lamp (lamp)
2 Cylindrical part 2A Termination 3 Base 8 Electric circuit board 8X Heating component 12 Light emitting part 13 Base plate (flat plate part)
13A Back 15 LED (light emitting element)
16 LED substrate 22 Globe 25 Radiation fin 25A Fin tip 25B Fin base portion 27 Fixed bush 27A Abutting projection 28 Insulating sheet 29 Heat sink 29A Tip portion 29B Fitting recess 29D Heat conducting member 60 Lamp holder 62 Holder housing 70 Annular waterproof packing 91 Separating part 95 LED lamp device 101-shaped fin 101A fin tip 102 short radiating fin 102D end 103 sorting fin 105 connecting part 106 outer annular fin (annular radiating fin)
107 Inner annular fin (annular radiating fin)
F Airflow path S, Sa Clearance

Claims (5)

A lamp comprising: a substrate on which a light emitting element is mounted; a flat plate portion on which the substrate is mounted; and a cylindrical portion that extends from the back surface of the flat plate portion and is provided with a base at the end and contains an electric circuit board inside In
On the back surface of the flat plate portion, a plurality of radiating fins extending radially along the cylindrical portion with a gap from the cylindrical portion, with the cylindrical portion as a center,
The lamp | ramp characterized by providing the connection part which connects the edge parts by the side of the cylindrical part of the at least 2 said radiation fin, and forms an airflow path between the said cylindrical parts.   The lamp according to claim 1, further comprising a distribution fin that divides the airflow into each set between the set of radiating fins connected by the connecting portion and the other set.   The short radiating fin with the length from the back surface of the said flat plate part shorter than the said radiating fin is provided between each radiating fin connected by the said connection part, The Claim 1 or 2 characterized by the above-mentioned. lamp.   The back surface of the flat plate portion is provided with a plurality of annular annular heat dissipating fins having a length from the back surface of the flat plate portion shorter than the short heat dissipating fins and surrounding the cylindrical portion. The lamp according to any one of 1 to 3.   5. The apparatus according to claim 1, further comprising a heat conduction member that is provided between the heat generating component of the electric circuit board and the cylindrical portion and transmits heat of the heat generating component to the cylindrical portion. Lamp described in.

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