JP2011233469A - Led lamp and lighting device using the same - Google Patents

Abstract

An LED lamp having a structure for efficiently releasing heat from an LED and an illumination device using the LED lamp are provided.
An LED lamp 100 includes an LED substrate 3 on which a plurality of LEDs 4 are mounted, a base 1 detachably connected to a power supply socket, and an LED 4 and the base 1 that are electrically connected to light the LED 4 The lighting device 2 to be operated, the heat sink 6 having the plate-like heat transfer portion 61 and the heat dissipating portion 62 composed of a plurality of rod-like bodies 63 standing on one surface of the heat transfer portion 61, and the lighting device 2 are accommodated. And a metal base 5 having a plate-like installation part 53 on which the LED board 3 and the heat sink 6 are installed. The LED board 3 is installed on one surface of the installation part 53. The heat sink 6 is installed on the other surface of the installation part 53, and the rod-like body 63 stands on the opposite side of the LED substrate 3 with the installation part 53 and the heat transfer part 61 interposed therebetween.
[Selection] Figure 2

Description

  The present invention relates to an LED lamp using a light emitting diode (hereinafter referred to as LED) as a light source and an illumination device using the LED lamp.

  Various technologies have been developed to use LEDs with low power consumption and long life in lighting devices. For example, Patent Document 1 proposes an LED lamp that can be directly mounted on a conventional incandescent light bulb socket by providing a base of the same standard as a base used for an incandescent light bulb.

JP 2001-243807 A

  In an LED lamp, it is necessary to use a plurality of LEDs in order to obtain brightness equivalent to that of an incandescent bulb. When the LED emits light, the LED itself generates heat, but when a plurality of LEDs are installed in the lamp, the amount of heat generation increases. If this heat cannot be radiated to the outside, the life of the LED will be reduced or destroyed. In the LED lamp of Patent Document 1, this problem due to heat generation is not sufficiently considered.

  This invention is made | formed in view of such a problem, and it aims at providing the LED lamp which has a structure which discharge | releases the heat | fever from LED efficiently, and an illuminating device using the same.

In order to achieve the above object, an LED lamp according to a first aspect of the present invention includes an LED substrate on which a plurality of LEDs are mounted,
A base detachably connected to a power supply socket;
A lighting device that is electrically connected to the LED and the base and lights the LED;
A heat sink having a plate-shaped heat transfer section and a heat dissipation section composed of a plurality of rod-like bodies that are forested on one surface of the heat transfer section;
A metal frame having a housing part in which the lighting device is housed and a plate-like installation part in which the LED substrate and the heat sink are installed;
The LED substrate is installed on one surface of the installation part,
The heat sink is installed on the other surface of the installation part,
The rod-shaped body is erected toward the opposite side of the LED board across the installation part and the heat transfer part,
It is characterized by that.

In addition, the gantry has a cylindrical side portion having an opening end on one side with the installation portion as a bottom plate,
The side part may be arranged so as to surround the heat sink.

  The rod-like body may be a cylinder or a polygonal column.

  The rod-shaped body may be a hollow tubular body.

  Moreover, when the base is attached to the socket for power supply having a flange at the open end, the end of the radiated heat radiation portion may be formed so as to contact the flange.

  In addition, when the base is mounted on the power supply socket having a flange at the open end, the open end of the side surface portion of the gantry may be formed so as to contact the flange.

In order to achieve the above object, an illumination device according to a second aspect of the present invention is equipped with the LED lamp.
It is characterized by that.

  The lighting device may be a traffic signal lamp.

In addition, it has a light-transmitting cover colored in red, yellow, or blue, or a lamp mounting portion covered with a non-colored light-transmitting cover,
The LED lamp may be mounted on the lamp mounting portion.

  The LED lamp that emits light of the same color as the color of the translucent cover may be mounted on the lamp mounting portion.

  ADVANTAGE OF THE INVENTION According to this invention, the LED lamp which has a structure which discharge | releases the heat | fever from LED efficiently, and an illuminating device using the same can be provided.

It is a front view of the LED lamp which concerns on embodiment of this invention. It is a principal part schematic longitudinal cross-sectional view of the LED lamp which concerns on embodiment of this invention. It is a perspective view of the heat sink concerning an embodiment of the invention. It is the bottom view which looked at the LED lamp which concerns on embodiment of this invention from the nozzle | cap | die side. It is a cross-sectional view at the time of making the rod-shaped body of the heat sink which concerns on embodiment of this invention into a polygon. It is a cross-sectional view at the time of making the rod-shaped body of the heat sink which concerns on embodiment of this invention into a tubular body. It is a principal part schematic longitudinal cross-sectional view at the time of mounting | wearing the socket for power supply with the LED lamp shape | molded so that a rod-shaped body may contact a flange part. It is a principal part schematic longitudinal cross-sectional view at the time of mounting | wearing the socket for power supply with the LED lamp shape | molded so that a side part may contact a flange part. It is a front view of the traffic signal lamp which concerns on embodiment of this invention. It is a principal part schematic sectional drawing of the traffic signal lamp which concerns on embodiment of this invention.

(Embodiment 1)
As shown in FIG. 1, the LED lamp 100 according to Embodiment 1 is an LED lamp having a shape in which a cylindrical side surface portion 52 is covered with a hemispherical light-transmitting cover 7. This LED lamp 100 is used by inserting a base 1 into a power supply socket (not shown). Hereinafter, the LED lamp 100 will be described with reference to the drawings.

  As shown in FIG. 2, the LED lamp 100 includes a base 1, a lighting device 2, an LED substrate 3, an LED 4, a frame 5, a heat sink 6, a translucent cover 7, and an insulating cylinder 8. The

  The base 1 is a rotary base for mounting in a socket for an incandescent lamp, for example. The base 1 is formed with a spiral groove on the outer peripheral surface, and is screwed into a power supply socket having a corresponding groove. The base 1 supplies an AC voltage (for example, 100 V) supplied from the socket to the lighting device 2 through the lead wire 9.

  The lighting device 2 has a function of converting the AC voltage supplied from the base 1 into a predetermined DC voltage. The lighting device 2 supplies the converted DC voltage to the LED substrate 3 through the lead wire 10.

  The LED substrate 3 is a substrate on which a plurality of LEDs 4 are mounted and a wiring pattern for sending a DC voltage to the LEDs 4 via the lead wires 10 is formed.

  The LED 4 is a light emitting diode that emits visible light such as red, yellow, blue, and white. The LED 4 emits light to the outside by power feeding from the LED substrate 3.

  The translucent cover 7 is a hemispherical cover made of milky white resin. As shown in FIG. 2, the translucent cover 7 is installed on the gantry 5 so as to cover the LED substrate 3. The translucent cover 7 transmits light emitted from the LED 4 and refracts and diffuses the light of the LED 4 that is strong in one direction (high directivity).

  The gantry 5 includes a cylindrical storage portion 51, a cylindrical side surface portion 52, and a disk-shaped installation portion 53 having a circular hole formed in the center. The gantry 5 is integrally formed by connecting the opening end of the side surface portion 52 to the outer periphery of the disc-shaped installation portion 53 and connecting the opening end of the accommodating portion 51 to a place where the hole of the installation portion 53 is formed. Structure. Further, the gantry 5 is made of metal.

  The accommodating part 51 is a cylindrical body in which the lighting device 2 is accommodated. The housing part 51 is insulated by the insulating cylinder 8 so that the lighting device 2 does not come into contact with the housing part 51.

  The insulating cylinder 8 is a cylinder composed of a nonconductive resin. As shown in FIG. 2, the insulating cylinder 8 covers the lighting device 2 so that the lighting device 2 does not come into contact with surrounding metals (the gantry 5 and the base 1). Further, as shown in FIG. 2, the insulating cylinder 8 connects the base 1 and the mount 5 so as not to contact each other.

  The side surface portion 52 is a portion that becomes a handle when the LED lamp 100 is attached to the power supply socket. The side surface portion 52 is disposed so as to surround the heat sink 6 described later.

  In the installation portion 53, the LED substrate 3 and the heat sink 6 are installed. The surface where the LED 4 of the LED substrate 3 is not mounted is installed on one surface of the installation unit 53, and the heat sink 6 is installed on the other surface of the installation unit 53.

  The heat sink 6 has a function as a so-called heat radiator that releases heat transmitted from the installation portion 53 to the outside. As shown in FIG. 3, the heat sink 6 includes a plate-shaped heat transfer portion 61 and a heat dissipation portion 62.

  The heat transfer section 61 is a circular metal plate with a circular hole formed in the center, and a plurality of rod-shaped bodies 63 are installed on one surface as shown in FIG. As shown in FIG. 2, the heat transfer unit 61 is installed with the other surface facing the LED substrate 3 with the installation unit 53 interposed therebetween. Moreover, the heat transfer part 61 is installed so that the accommodating part 51 may be inserted in the center hole, as shown in FIG.

  The heat dissipating part 62 is composed of a plurality of metal rods 63. This rod-shaped body 63 has a cylindrical shape, and is installed so as to stand toward the opposite side of the LED substrate 3 with the installation portion 53 interposed therebetween.

  As described above, the LED substrate 3 is disposed in the vicinity of the installation portion 53 of the gantry 5, and the heat generated by the LED 4 is quickly transmitted from the LED substrate 3 to the installation portion 53. Since the heat transfer part 61 of the heat sink 6 is arranged close to the installation part 53, the heat transmitted to the installation part 53 is directly transferred to the heat transfer part 61. Since the rod-shaped body 63 protrudes from the heat transfer section 61, the heat transmitted to the heat transfer section 61 is immediately transmitted to the rod-shaped body 63 and released to the outside.

  Further, the heat dissipating part 62 of the heat sink 6 is composed of a plurality of rod-like bodies 63. Since the rod-like bodies 63 have a large surface area, the contact area with the outside air is large. As a result, the heat generated by the LED 4 is efficiently released to the outside.

  Further, since the side surface portion 52 is provided on the gantry 5, the heat that has reached the side surface portion 52 through the installation portion 53 is efficiently released to the outside.

  Thus, the LED lamp 100 has a high heat dissipation effect. For this reason, even if a plurality of LEDs 4 are mounted on the LED substrate 3, heat generated from the plurality of LEDs 4 is efficiently dissipated, so that the lifetime reduction of the LEDs 4 and the destruction of the LEDs 4 are suppressed.

  The lighting device 2 also generates heat. The heat generated by the lighting device 2 is transmitted to the heat sink 6 through the housing part 51 and the installation part 53. Then, heat is dissipated in the same manner as described above. Further, since the heat generated by the lighting device 2 is also transmitted to the side surface portion 52 through the housing portion 51 and the installation portion 53, the heat is also released from the side surface portion 52. Thus, since the failure due to heat is also suppressed in the lighting device 2, the LED 4 can emit light stably.

  In the present embodiment, the shape of the rod-shaped body 63 of the heat sink 6 is a cylinder, but this shape is not limited to a cylinder. As shown in FIGS. 5A, 5B, and 5C, the rod 63 may be a polygonal column such as a hexagon, an octagon, or a star. Moreover, the rod-shaped body 63 may be a tubular body having a hollow center as shown in FIGS. 6 (A), 6 (B), and 6 (C). Since the surface area of the rod-shaped body 63 is increased, the heat dissipation efficiency is further improved.

  In addition, the housing portion 51 may be filled with a resin such as an epoxy resin. Since the epoxy resin or the like has a higher thermal conductivity than air, the heat generated by the lighting device 2 is transmitted to the housing portion 51 through the resin and can be radiated more efficiently.

  Moreover, it is preferable that a metal having high thermal conductivity is used as the material of the gantry 5 and the heat sink 6. For example, aluminum, copper, stainless steel and the like.

  The length of the rod-like body 63 of the heat sink 6 is arbitrary, but is preferably set as appropriate according to the power supply socket to be mounted. For example, as shown in FIG. 7, when the LED lamp 100 is mounted on the power supply socket 101 having the metal flange 11, the rod 63 is formed so that the tip of the rod 63 contacts the flange 11. It is preferable that Since the heat transmitted to the rod-shaped body 63 is transmitted to the flange portion 11, the heat is also released from the flange portion 11 to the outside. For this reason, more efficient heat dissipation can be performed.

  Further, the length of the side surface portion 52 of the gantry 5 is arbitrary, but is preferably set as appropriate according to the power supply socket to be mounted. For example, as shown in FIG. 8, the length of the side surface portion 52 is preferably such that the open end of the side surface portion 52 contacts the flange portion 11. The heat reaching the side surface portion 52 can be released to the outside through the flange portion 11, and more efficient heat dissipation can be performed.

  The translucent cover 7 is not limited to a milky white resin hemispherical cover, and may be a translucent cover of red, yellow, or blue. Further, instead of resin, a glass cover may be used. Moreover, the translucent cover 7 does not need to be installed.

(Embodiment 2)
An illumination device using the LED lamp 100 will be described using a traffic signal lamp as an example. As shown in FIG. 9, the traffic signal light 102 is a traffic signal light (signal) for a vehicle. The three colored covers 15 are red, yellow, and blue translucent colored covers 15, and LED lamps 100 that emit red, yellow, and blue light are mounted therein.

  As shown in FIG. 10, the traffic signal lamp 102 includes an LED lamp 100, a power supply socket 101, a reflecting mirror 12, a main body 13, a front plate 14, and a colored cover 15. The description of the LED lamp 100 is the same as that of the first embodiment, and will be omitted.

  The power supply socket 101 is a screw-type power supply socket having a metal flange portion 11. An incandescent bulb can be attached to the power supply socket 101, but in this embodiment, an LED lamp 100 that emits red, yellow, or blue light is attached. The power supply socket 101 is connected to a traffic signal controller (not shown) by an electric wire 16. The power supply socket 101 receives power supplied from the traffic signal controller and supplies power to the LED lamp 100.

  The reflecting mirror 12 is a parabolic curved reflecting mirror that reflects the light emitted from the LED lamp 100 toward the colored cover 15. There is an opening in the center of the reflecting mirror 12, and a power supply socket 101 to which the LED lamp 100 is attached is attached to the opening.

  The main body 13 is a box made of resin or metal, and stores the reflecting mirror 12 with the LED lamp 100 mounted therein.

  The front plate 14 is a resin or metal front panel that covers the front surface of the main body 13. As shown in FIG. 9, three circular colored covers 15 are attached to the front plate 14.

  The colored cover 15 is a red, yellow, or blue translucent cover. The colored cover 15 allows a driver or the like to visually recognize red, yellow, or blue light from the traffic light 102 by allowing only red, yellow, or blue component light to pass therethrough.

  In the present embodiment, an LED lamp 100 that emits light of the same color as the color of the cover is mounted inside the colored cover 15. That is, a red light emitting LED lamp 100 is mounted inside the red colored cover 15, and a yellow light emitting LED lamp 100 is mounted inside the yellow colored cover 15. A blue light emitting LED lamp 100 is mounted inside the cover 15.

  This is a phenomenon in which when the sunlight enters from the front of the traffic signal light 102, such as early morning or sunset, the light of the lamp is drowned out by the sunlight reflected by the reflecting mirror 12, and it becomes impossible to visually recognize which color is lit. It is taken into consideration. This phenomenon occurs because the light of the lamp is greatly weakened by the colored cover 15 because the colored cover 15 allows only a specific color component to pass, and as a result, the sunlight exceeds the light of the lamp. .

  However, for example, if the red light emitting LED lamp 100 is mounted inside the red cover, the light from the LED lamp 100 is not weakened by the colored cover 15 because the lamp originally emits only red light. As a result, the driver can clearly distinguish between sunlight and signal light.

  In addition, when using the LED lamp 100 of red light emission, yellow light emission, and blue light emission, it may replace with the colored cover 15 and the non-colored cover may be installed in the front board 14. FIG.

  According to this embodiment, the traffic signal light which can attach or detach the LED lamp 100 easily can be provided.

  Moreover, in this Embodiment, although the traffic signal lamp for vehicles was shown as an example of a traffic signal lamp, this is not restricted to the traffic signal lamp for vehicles. It may be a traffic light for pedestrians, bicycles, railways, and trams. Moreover, the arrow light used for the traffic signal light for vehicles and a tram may be sufficient, and the warning light for a circuit breaker may be sufficient.

  Moreover, as an illuminating device using the LED lamp 100, a street light, a display light, a revolving light, a marker light, and a warning light may be used besides a traffic signal light.

1 base 2 lighting device 3 LED board 4 LED
DESCRIPTION OF SYMBOLS 5 Base 6 Heat sink 7 Translucent cover 8 Insulating cylinder 9, 10 Lead wire 11 Flange part 12 Reflector 13 Main body 14 Front plate 15 Colored cover 16 Electric wire 51 Storage part 52 Side part 53 Installation part 61 Heat transfer part 62 Heat radiation part 63 Rod body 100 LED lamp 101 Power supply socket 102 Traffic signal lamp

Claims (10)

An LED substrate on which a plurality of LEDs are mounted;
A base detachably connected to a power supply socket;
A lighting device that is electrically connected to the LED and the base and lights the LED;
A heat sink having a plate-shaped heat transfer section and a heat dissipation section composed of a plurality of rod-like bodies that are forested on one surface of the heat transfer section;
A metal frame having a housing part in which the lighting device is housed and a plate-like installation part in which the LED substrate and the heat sink are installed;
The LED substrate is installed on one surface of the installation part,
The heat sink is installed on the other surface of the installation part,
The rod-shaped body is erected toward the opposite side of the LED board across the installation part and the heat transfer part,
An LED lamp characterized by that. The mount has a cylindrical side surface portion having an opening end on one side with the installation portion as a bottom plate,
The side portion is disposed so as to surround the heat sink,
The LED lamp according to claim 1. The rod-like body is a cylinder or a polygonal column,
The LED lamp according to claim 1 or 2, wherein The rod-shaped body is a hollow tubular body,
The LED lamp according to any one of claims 1 to 3, wherein When the base is attached to the socket for power supply having a flange at the open end, the end of the radiated heat radiation portion is shaped so as to contact the flange,
The LED lamp according to any one of claims 1 to 4, wherein: When the base is mounted on a power supply socket having a flange at the open end, the open end of the side surface portion of the mount is shaped so as to contact the flange.
The LED lamp according to any one of claims 1 to 5, wherein: The LED lamp according to any one of claims 1 to 6 is mounted.
A lighting device characterized by that. The lighting device is a traffic light;
The lighting device according to claim 7. Having a light-transmitting cover colored in red, yellow, or blue, or a lamp mounting portion covered with a non-colored light-transmitting cover;
The LED lamp is mounted on the lamp mounting portion,
The lighting device according to claim 8. The LED lamp that emits light of the same color as the color of the translucent cover is mounted on the lamp mounting portion.
The lighting device according to claim 9.

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