JP5594549B2 - Light bulb shaped lamp and lighting apparatus using this light bulb shaped lamp - Google Patents

Description

  Embodiments described herein relate generally to a light bulb shaped lamp that emits light emitted from an LED (Light Emitting Diode) to the outside and a lighting fixture using the light bulb shaped lamp.

  In recent years, LED bulbs have been commercialized that can achieve longer life and lower power consumption than ordinary incandescent bulbs.

  As the temperature rises, the lifetime of the LED decreases as the light output decreases. Therefore, a lamp using an LED as a light source is configured to improve heat dissipation of the LED in order to suppress an increase in the temperature of the LED.

  This type of LED bulb, for example, as disclosed in Patent Document 1, dissipates heat generated from LEDs from a plurality of fins and an LED module on which a plurality of LEDs are surface-mounted. A heat dissipating part, a glove attached to the heat dissipating part, covering the LED module and emitting light emitted from the LED to the outside, and a base provided on the opposite side of the glove.

JP 2010-56059 A

  Conventional LED light bulbs are miniaturized to a size close to that of general incandescent light bulbs defined in JIS, but are not similar to incandescent light bulbs for general illumination due to their large radiators. In addition, the emission direction of the emitted light of the plurality of LEDs is mainly orthogonal to the surface on which the plurality of LEDs are surface-mounted.

  For this reason, in the conventional LED bulb, most of the radiated light of the plurality of LEDs is in a direction orthogonal to the mounting surface, and since the proportion of the globe is small, the radiated light from the mounting surface toward the heat sink The amount of light is so small that it cannot be brightened over the entire surface of the glass sphere like an incandescent light bulb for general illumination.

  Therefore, the present embodiment has been made in view of such problems, and provides a light bulb shaped lamp that can brighten the entire lamp, such as an incandescent light bulb, and a lighting fixture using the light bulb shaped lamp. With the goal.

Light emitting module have a light emitting surface, the back surface side of the light-emitting surface is attached to one side of the heat conductor; self-ballasted lamp according to the present embodiment includes a heat conducting member provided along the central axis of the lamp A translucent globe provided to cover the heat conductor and the light emitting module so that the light emitting module has a maximum diameter portion and the light emitting module is substantially disposed at the maximum diameter portion ; and a drive for driving the light emitting module A circuit ; and a base provided on the other side of the heat conductor .

  According to the light bulb shaped lamp and the lighting fixture using this light bulb shaped lamp according to the present embodiment, the entire lamp can be brightened like an incandescent light bulb.

Sectional drawing of the lightbulb-shaped lamp which concerns on embodiment of this invention. The front view of the lightbulb-shaped lamp of FIG. The perspective view which shows the structure of the heat conductor and heat radiator of FIG. The perspective view which fractured | ruptured partially which showed the structure of the thermal radiation body and base of FIG. Sectional drawing which shows the structure of the principal part of the lightbulb-shaped lamp which concerns on a 1st modification. Sectional drawing which shows the structure of the light bulb shaped lamp which concerns on a 2nd modification. The perspective view which shows the structure of the heat conductor and heat radiator of the lightbulb-shaped lamp which concern on a 3rd modification.

A light bulb shaped lamp according to an embodiment of the present invention is provided with a metal heat dissipating body having a wiring insertion hole and a flat surface on one end side; a columnar portion, and one end side of the columnar portion; A wide portion having a mounting surface on one end side that is larger than the width of the columnar portion and orthogonal to the central axis of the lamp, and the columnar portion side is attached to substantially the center of the flat surface of the radiator. A metal heat conductor provided so as to extend to one end along the central axis of the lamp; and a mounting surface having a light emitting surface, and a back surface side of the light emitting surface is a wide portion of the heat conductor A light-emitting module attached so as to be in surface contact with the light-transmitting member; and a translucent layer provided so as to cover the heat conductor and the light-emitting module so that the light-emitting module has a maximum diameter portion and is substantially disposed at the maximum diameter portion. provided at the other end of the radiator, and a resin holder comprising a through hole; cover and tree It is accommodated in the holder, and a driving circuit for driving the light emitting module; one is connected to the drive circuit and the other lead wire connected to the light emitting module via wire insertion hole of the through hole and the heat radiating body of the resin holder ; are provided with; a mouthpiece provided on the other end side of the heat conductor.
In the embodiments of the present invention and the following claims, the definitions and technical meanings of terms are as follows unless otherwise specified.

  As the light emitting module, for example, a flat light source unit having a light emitting surface on which a plurality of LEDs are surface-mounted is used, but an organic EL or the like may be used in addition to the LEDs. The light emitting module is disposed such that the light emitting surface is opposite to the mounting surface, and the mounting surface on the back surface side of the light emitting surface is disposed on the base.

  If the light emitting module is attached to one side and the base is attached to the other side, the base body may be formed integrally or separately, such as a module mounting part, a heat radiating part, or a base mounting part. I do not care.

  The base also transmits heat generated from the attached light emitting module. For example, a metal member having good thermal conductivity is used. An example of the metal member having good thermal conductivity is a die-cast member using aluminum or the like. Of course, the present invention is not limited to the die-cast member using aluminum or the like, and other metal members may be used. The shape of the heat conductor may be any shape as long as it effectively transfers heat.

  The base also radiates heat generated from the light emitting module. For example, a metal member having good thermal conductivity is used. As a metal member having good thermal conductivity, for example, a die-cast member using aluminum or the like is used similarly to the radiator. Of course, it is not limited to the die-cast member using aluminum or the like, and other metal members may be used.

  The shape of the substrate is not particularly limited as long as it effectively radiates heat. For example, a plurality of radiating fins are provided radially on the side surface from the center of the radiating body to the outside. Configure.

  The base is provided on the opposite side of the base to which the light emitting module is attached, and the shape thereof is not limited, such as a screw-in type or a pin type. That is, the base is interposed between the light emitting module and the base, and it is desirable to reduce the height dimension in the lamp mounting direction if a predetermined heat dissipation effect can be obtained.

  The globe covers the light emitting module and the heat conductor and emits light emitted from the light emitting surface of the light emitting module to the outside, and the portion covering the light emitting module and the heat conductor has translucency. Is done. As the member having translucency, for example, a resin member having translucency and diffusivity is used, and as this resin member, for example, a thermoplastic plastic such as polycarbonate is used.

  In addition, the shape of the globe is preferably such that the portion covering the light emitting module and the heat conductor is formed in a smooth curved surface close to the shape of a glass bulb of a general incandescent bulb, and the top side is configured in a substantially spherical shape. .

Further, in the light bulb shaped lamp, the light emitting module configured to be larger than the opening diameter of the globe is disposed in the vicinity of the maximum diameter portion of the globe, and the globe has two upper and lower portions in the vicinity of the maximum diameter portion. You may divide and comprise.

  In the cross section of the light bulb shaped lamp cut along the central axis of the light bulb shaped lamp, the width of the light emitting surface of the light emitting module is configured to be larger than the opening diameter of the globe at the connecting portion between the globe and the radiator. ing. In this case, it is desirable to arrange the light emitting surface of the light emitting module at the maximum diameter of the globe.

Since the width dimension of the light emitting surface of the light emitting module is configured to be larger than the opening diameter of the globe at the connection portion between the globe and the heat radiating body, usually mounting the light emitting module in one glove Have difficulty. However, in the present embodiment, the globe is divided into two upper and lower parts in the direction perpendicular to the central axis direction of the light bulb shaped lamp in the vicinity of the light emitting surface of the light emitting module, that is, the maximum diameter portion of the globe. Composed. For this reason, the light emitting module can be easily mounted in the glove.
Further, the light bulb shaped lamp may have a light distribution means for distributing the irradiation light from the light emitting module.

  The light distribution means may be a means for reflecting the light from the light emitting module in a direction different from the irradiation direction, or a means for guiding the light directed toward one side in a different direction. In short, all the light irradiated toward the top of the globe is allowed as long as the light distribution that allows the entire globe to shine is possible.

And the lighting fixture of embodiment which concerns on this invention comprises the said lightbulb-shaped lamp; The lighting fixture main body which has a socket with which the said lightbulb-shaped lamp is mounted | worn. Therefore, it is possible to provide a lighting fixture having the same effect as the light bulb shaped lamp of the present embodiment.
(Embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 4 relate to the light bulb shaped lamp of the present embodiment, FIG. 1 is a sectional view of the light bulb shaped lamp according to the present embodiment, and FIG. 2 is a front view of the light bulb shaped lamp of FIG. 3 is a perspective view showing the configuration of the heat conductor and the heat radiator of FIG. 1, and FIG. 4 is a partially broken perspective view showing the configuration of the heat radiator and the base of FIG.

  As shown in FIGS. 1 and 2, an LED bulb 1 that is a bulb-type lamp according to the present embodiment includes an LED module 2 that is a light emitting module having a light emitting surface 2A, a heat conductor 3 that constitutes a base, and heat dissipation. It has a body 4, a resin holder 5, a base 6, and a globe 7.

  The LED module 2 is a flat light source unit having a light emitting surface 2A on which a plurality of LEDs 11 are surface-mounted. As shown in FIG. 3, the LED module 2 is configured as a light emitting surface 2 </ b> A by mounting a plurality of LEDs 11 on one surface of a flat rectangular parallelepiped substrate 10.

Further, the wiring 13 is drawn out from the side surface portion of the LED module 2, and the wiring 13 is connected to the connector 14. A lead wire 9 from the drive circuit 8 is connected to the connector 14. The LED module 2 is disposed such that the light emitting surface 2A faces outward, that is, on the opposite side of the mounting surface, and the mounting surface on the back surface side of the light emitting surface 2A is attached in close contact with the heat conductor 3.
The heat conductor 3 transmits heat generated from the attached LED module 2, and is formed of, for example, a die-cast member using aluminum or the like.

The heat conductor 3 has a circular cross-sectional shape perpendicular to the central axis SS, and the same diameter from the middle as the diameter of the cross-section gradually decreases from the mounting surface of the LED module 2 toward the mounting surface of the radiator 4. And a shape having a diameter portion. In other words, the cross-sectional shape parallel to the central axis SS of the heat conductor 3 has a curved portion that gradually narrows toward the mounting direction S of the LED bulb 1 indicated by the arrow in FIG. And a straight line portion parallel to the central axis SS. In other words, the diameter of the heat conductor 3 gradually increases along the central axis SS from the radiator 4 toward the LED module 2 and toward the LED module 2 side direction. It has a three-dimensional shape consisting of a flange part.

As shown in FIGS. 1 and 3, the heat conductor 3 has a surface 3x to which the LED module 2 is attached, a wiring through hole 3a provided along the central axis SS, and a surface 3x opposite to the surface 3x. And a screw portion 3b provided so as to protrude from the base end portion. The wiring through hole 3a is a hole penetrating from the surface 3x via the screw portion 3b in the main body of the heat conductor 3. The lead wire 9 is inserted into the wiring through hole 3a.
The heat conductor 3 is attached to the heat radiating body 4 by screwing the screw portion 3b into a screw hole 4b provided on the upper surface of the heat radiating body 4 described later.

  The heat radiating body 4 radiates heat generated from the LED module 2 transmitted to the heat conductor 3, and is formed of, for example, a die-cast member using aluminum or the like.

  Further, as shown in FIGS. 2 and 3, the heat dissipating body 4 is provided with a plurality of heat dissipating fins 4 a radially on the side surface from the center of the heat dissipating body 4 toward the outside. The heat generated from the LED module 2 transmitted by the heat conductor 3 is transmitted to the plurality of heat radiation fins 4a through the heat radiation body 4, and is radiated from the plurality of heat radiation fins 4a.

  As shown in FIG. 2, the plurality of heat radiation fins 4a are provided so as to be substantially parallel to the central axis SS (see FIG. 1). However, the present invention is not limited to this. Alternatively, it may be provided in a spiral shape.

  Further, as described above, the surface of the radiator 4 that contacts the heat conductor 3 is provided with a screw hole 4b for screwing the screw portion 3b of the heat conductor 3, and an outer edge of this surface. The part is provided with a locking groove 4c for locking a globe 7 to be described later. Further, the screw hole 4b communicates with the wiring through hole 4d penetrating from the surface in contact with the heat conductor 3 to the lower surface. Therefore, the wiring through hole 4d of the heat radiating body 4 communicates with the wiring through hole 3a of the heat conductor 3 through the screw hole 4b.

  The resin holder 5 is attached to the side of the radiator 4 opposite to the side on which the heat conductor 3 is attached. This resin holder 5 is formed in a cylindrical shape with one end side closed using an insulating resin member, and in a state in which a drive circuit 8 for driving the LED module 2 is accommodated, It is fitted in a base 6 which will be described later. The resin holder 5 is filled with an insulating member 6b such as silicon in order to insulate the drive circuit 8.

The base 6 has a hollow portion 6 a inside, and a resin holder 5 that houses the drive circuit 8 is built in the hollow portion 6 a. That is, the base 6 incorporates all or part of the drive circuit 8 in the hollow portion 6 a by the resin holder 5.
In order to insulate the drive circuit 8, an insulating member 6b such as silicon is also filled in the gap between the hollow portion 6a and the resin holder 5.

  Thus, by incorporating the drive circuit 8 of the LED module 2 into the hollow portion 6a of the base 6 via the resin holder 5, the temperature rise of the drive circuit 8 can be suppressed and the life of the drive circuit 8 can be maintained. .

  In the present embodiment, the globe 7 covers the LED module 2 and the heat conductor 3 and emits the emitted light from the light emitting surface 2A of the LED module 2 to the outside. The part which covers is configured to have translucency. The globe 7 constitutes a light distribution means for distributing the irradiation light from the LED module 2.

  As the member having translucency, for example, a resin member having translucency and diffusibility is used, and this resin member is made of, for example, thermoplastic plastic such as polycarbonate.

  In addition, the shape of the globe 7 is desirably configured such that a portion covering the LED module 2 and the heat conductor 3 is formed up to the vicinity of the base like a glass bulb of a general incandescent bulb. That is, the globe 7 is integrally formed with a spherical portion formed in a substantially spherical shape, and a substantially cylindrical reduced diameter portion gradually reduced in diameter to a smaller diameter than the spherical portion below the spherical portion, The spherical portion has a maximum diameter portion indicating the maximum diameter portion of the globe 7. The reduced diameter portion is formed with an open end at one end (the lower end in the figure) of the globe 7, and this open end is attached to the base.

  In the present embodiment, the LED bulb 1 has a width dimension L1 of the light emitting surface 2A of the LED module 2 in the cross section of the LED bulb 1 cut along the central axis SS which is also the central axis of the LED bulb 1. The opening 7 is configured to be larger than the opening diameter L2 of the globe 7 at the connection portion between the globe 7 and the radiator 4.

  In this case, the light emitting surface 2A of the LED module 2 is desirably arranged at a position corresponding to the maximum diameter L3 of the globe 7 in the cross section of the LED bulb 1 cut along the central axis SS.

  Since the width L1 of the light emitting surface 2A of the LED module 2 is configured to be larger than the opening diameter L2 of the globe 7 at the connection portion between the globe 7 and the radiator 4, the LED module 2 is usually one It is difficult to put it in the globe 7.

However, in the present embodiment, the globe 7 is divided into two in the vertical direction in the direction of the central axis SS of the LED bulb 1 in the vicinity of the light emitting surface 2A of the LED module 2, that is, at the maximum diameter L3 portion of the globe 7. Composed. That is, the globe 7 includes an upper globe 7A and a lower globe 7B, and the lower globe 7B is locked to the radiator 4.
In addition, these division | segmentation gloves 7A and 7B adhere to each other's division line part by ultrasonic welding, vibration welding, etc.
Therefore, since the globe 7 is divided into two parts, the LED module 2 can be easily mounted in the globe 7.
Next, a method for assembling such an LED bulb 1 will be described with reference to FIGS.

The operator houses the drive circuit 8 in the resin holder 5 and fills the gap portion inside with an insulating member 6b such as silicon, thereby insulating the drive circuit 8 and the resin holder 5 from each other.
In this case, two through holes 5b are provided on the upper surface of the resin holder 5, and lead wires 9 from the drive circuit 8 are drawn out from the two through holes 5b, respectively.

  Then, the resin holder 5 is fitted into the hollow portion 6 a of the base 6. Also in this case, the gap portion in the hollow portion 6a of the base 6 is insulated from the drive circuit 8 and the resin holder 5 by filling an insulating member 6b such as silicon.

Thereafter, the operator fixes the resin holder 5 fitted to the base 6 and the radiator 4. In this case, the protrusion 5c provided on the resin holder 5 and the recess 4e provided on the heat radiating body 4 are fixed by locking. Alternatively, the convex portion 5c and the concave portion 4e may be fixed with an adhesive, or may be fixed using silicon or the like. As a result, the resin holder 5 fitted to the base 6 is fixed to the radiator 4.
Further, the lead wire 9 drawn out from the resin holder 5 is drawn out through the wiring through hole 4d and the screw hole 4b of the radiator 4 as shown in FIG.

  Thereafter, the operator inserts the locking claw portion 7y provided on the opening side of the lower glove 7B (see FIG. 1) into the locking groove 4c (see FIG. 4) on the surface of the heat radiating body 4 and locks it. To do. In addition, although this latching groove 4c and the latching claw part 7y comprised the uneven shape as shown in FIG. 1, the heat radiator 4 and the lower glove 7B were fixed, it is not limited to this. Instead, other structures or other fixing methods may be used.

  Then, as shown in FIG. 3, the worker accommodates the heat conductor 3 to which the LED module 2 is attached in advance in the lower glove 7B, and the screw portion 3b of the heat conductor 3 is screwed into the screw of the heat radiator 4. The heat conductor 3 is fixed to the heat radiating body 4 by being screwed into the hole 4b.

  In this case, the lead wire 9 drawn out from the screw hole 4b of the radiator 4 is passed through the wiring through hole 3a of the heat conductor 3, and the end of the lead wire 9 drawn out is connected to the connector 14 of the LED module 2. Connecting.

  In addition, the connection between the heat conductor 3 and the heat radiating body 4 is not only screwed into the screw hole 4b of the screw portion 3b, but the fixing state may be strengthened using a filler such as an adhesive or silicon. .

Finally, the operator joins the lower glove 7B so as to match the upper glove 7A, and fixes by forming the welded portion 7x by, for example, ultrasonic welding.
In this way, the LED bulb 1 as shown in FIG. 2 can be assembled.

Thus, in this embodiment, since the globe 7 is divided into two parts, the LED module 2 can be easily placed in the globe 7 even with the LED module 2 having a large area of the light emitting surface 2A with good luminous efficiency. The LED bulb 1 can be easily assembled.
Next, the operation of the LED bulb according to the present embodiment will be described with reference to FIG.

  In the LED bulb 1 according to the present embodiment, a globe 7 configured using a resin member having translucency and diffusibility covers the LED module 2 and the heat conductor 3, and the light emitting surface 2 </ b> A of the LED module 2. The radiated light from is emitted to the outside. Further, the light emitting surface 2A of the LED module 2 is arranged at a position corresponding to the maximum diameter L3 of the globe 7 in the cross section of the LED bulb 1 cut along the central axis SS.

  In the LED bulb 1 having such a configuration, the light emitted from the light emitting surface 2A of the LED module 2 is mostly emitted from the LED 10 in a direction orthogonal to the light emitting surface 2A. Since it is composed of a resin member having transparency and diffusibility, a part of the emitted light is reflected on the inner surface of the upper globe 7A or diffused inside the upper globe 7A and emitted from the globe 7A. Further, it diffuses also in the direction of the cap 6 in the lower globe 7B through the gap between the globe 7 and the heat conductor 3.

In this case, in the LED bulb 1 of the present embodiment, the lower globe 7B fixed to the radiator 4 on the lower side (the base 6 direction side) from the light emitting surface 2 of the LED module 2 is the same as the upper globe 7A. Since it is comprised with the resin member which has a permeability | transmittance and a diffusivity, a diffused light can be radiate | emitted outside. That is, the light from the light emitting surface 2A of the LED module 2 and the diffused light are emitted to the outside, so that the entire globe 7 is brightened.
Therefore, according to the present embodiment, the entire lamp can be brightened like an incandescent bulb.

  Further, since the globe 7 is divided into the upper globe 7A and the lower globe 7B, the LED module 2 can be easily mounted in the globe 7, and the LED bulb 1 can be easily assembled.

  The radiator 4 is interposed between the heat conductor 3 and the base 6, and if a certain amount of heat dissipation effect can be obtained, the height dimension in the direction of the central axis SS of the lamp can be reduced. The LED bulb 1 can be lit with a shape close to that of a general incandescent bulb and light distribution.

  Furthermore, if it comprises as a lighting fixture main body provided with the socket by which such an LED light bulb is mounted | worn, it is possible to implement | achieve the lighting fixture which can acquire the same effect as the above.

As described above, the LED bulb 1 according to the present embodiment described above may be configured as in first to third modifications described later. Such first to fifth modifications will be described with reference to FIGS.
(First modification)

  FIG. 5 is a cross-sectional view showing the configuration of the main part of the LED bulb according to the first modification of the present embodiment. In the first modification shown in FIG. 5, in order to radiate light from the light emitting surface 2A of the LED module 2 to the lower globe 7B as well as the inside of the upper globe 7A, the upper globe 7A A reflector mirror 15 is provided in the vicinity of the center of the inner peripheral surface.

  The reflector mirror 15 is, for example, a half mirror, and is formed using a resin member that is formed in a hemispherical shape and has characteristics such that it transmits a certain amount of light but reflects light in a predetermined direction on its outer peripheral surface. .

  The reflector mirror 15 may be fixed by being attached to a predetermined position of the upper glove 7A with a transparent adhesive or the like, or the upper glove 7A may be fixed using the same resin member as the upper glove 7A. It may be formed by molding integrally.

  Further, in order to more effectively increase the amount of light diffusion to the lower globe 7B side, the heat conductor 3 is configured so that the cross-sectional shape parallel to the central axis SS is T-shaped, The space between the inner peripheral surface of the globe 7B and the heat conductor 3 is enlarged.

  Further, the reflector mirror 15 may be configured by providing a transmissive resin member so as to be disposed between the inner peripheral surface of the upper globe 7A and the LED module 2 or the heat conductor 3.

According to such a first modification, more light and diffused light from the light emitting surface 2A of the LED module 2 can be emitted to the lower globe 7B as well as the upper globe 7A. The whole can be made brighter than in the above embodiment.
(Second modification)

  FIG. 6 is a cross-sectional view showing a configuration of an LED bulb according to a second modification of the present embodiment. As shown in FIG. 6, in order to further improve the thermal conductivity of the heat conductor 3, the LED bulb 1B of the second modified example is replaced with a heat pipe (Heat) in place of the heat conductor 3 of the present embodiment. The heat conductor 3B using the pipe 17 is provided.

The heat conductor 3B is configured by providing a heat pipe 17 in a portion between the LED module 2 and the heat radiator 4. And heat conductor 3B which has this heat pipe 17 is comprised so that the cross-sectional shape parallel to central axis SS may become a T-shape. A portion having a surface to which the LED module 2 is attached is formed of a die-cast member using aluminum or the like, as in the present embodiment.
At both ends of the heat pipe 17, screw portions are provided, and are fixed to the heat conductor 3 </ b> B and the heat radiator 4 by being screwed respectively.

  As is well known, the heat pipe 17 is made of a material having high thermal conductivity, for example, a pipe made of copper, in which a volatile liquid (working fluid) is sealed, and has a high thermal conductivity. Yes. In FIG. 9, the working liquid is sealed in the heat pipe 17, and the heat of the LED module 2 is efficiently moved to the heat radiating body 4.

  Therefore, according to the second modification, by providing the heat conductor 3B using the heat pipe 17, the thermal conductivity of the heat conductor 3B can be improved. Thereby, by improving the thermal conductivity of the heat conductor 3B, heat from the LED module 2 is efficiently transmitted to the heat radiating body 4, and the heat radiating action by the heat radiating body 4 prevents the temperature of the drive circuit 8 from being increased. The lifetime of the circuit 8 can be maintained.

Furthermore, since the temperature rise can be suppressed also in the LED module 2, radiation efficiency can be improved. Moreover, since the thermal conductivity in the lamp can be improved, the radiator 4 can be further reduced, and the irradiation area can be expanded by expanding the globe 7 in the direction of the base 6.
(Third Modification)

  FIG. 7 is a perspective view showing a configuration of a heat conductor and a heat radiator of an LED bulb according to a third modification of the present embodiment. As shown in FIG. 7, the LED light bulb of the third modified example is configured by providing a heat pipe 17 </ b> A between the side surface portion of the heat conductor 3 and the upper surface of the radiator 4 shown in FIG. 1.

  In this case, a through hole penetrating the side surface portion of the heat conductor 3 and the surface to which the LED module 2 is attached is provided, and the heat pipe 17A is inserted into the through hole so that one end portion of the heat pipe 17A is connected to the LED module 2. At the same time, a part of the peripheral surface of the heat pipe 17A is brought into contact with the inner peripheral surface of the through hole of the heat conductor 3.

  On the other hand, on the surface of the heat radiating body 4, a through hole 4 f is provided for inserting the heat pipe 17 </ b> A in contact with the outer peripheral surface of the other end of the heat pipe 17 </ b> A. The through holes 4f are provided in the heat radiating fins 4a of the heat radiating body.

  The heat pipe 17 is inserted into a through hole formed in the heat conductor 3, and the other end portion is inserted into a through hole 4f formed in the heat radiating fin 4a of the heat radiating body 4 to dissipate heat from the heat conductor 3. By fixing the body 4, the heat pipe 17 itself is also fixed.

  Therefore, according to the third modification, the heat pipe 17A is provided in the heat radiating fin 4a of the heat radiating body 4 in addition to the heat conductor 3, so that the heat conductor 3 is more than the embodiment shown in FIG. The thermal conductivity of can be improved. Thereby, like the 2nd modification, the heat conductivity of the heat conductor 3 is improved, the heat from the LED module 2 is efficiently transmitted to the heat radiating body 4, and it is driven by the heat radiating action by the heat radiating body 4. The temperature rise of the circuit 8 can be prevented and the life of the drive circuit 8 can be maintained.

Furthermore, since the temperature rise can be suppressed also in the LED module 2, radiation efficiency can be improved. Moreover, since the thermal conductivity in the lamp can be improved, the radiator 4 can be further reduced, and the irradiation area can be expanded by expanding the globe 7 in the direction of the base 6.
Note that the thickness or number of the heat pipes 17A may be set so that the luminous efficiency of the LED bulb 1 does not decrease.
Of course, in the LED bulbs of the first to fifth modifications described above, the same effects as in the present embodiment can be obtained.
The present invention is not limited to the above-described embodiments and modifications, and various changes and modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... LED bulb, 2 ... LED module, 2A ... Light-emitting surface, 3 ... Thermal conductor, 3a ... Wiring through-hole, 3b ... Screw part, 4 ... Radiator, 4a ... Radiation fin, 4b ... Screw hole, 4c ... Engagement Stop groove, 5 ... Resin holder, 6 ... Base, 6a ... Hollow part, 7 ... Globe, 7A ... Upper glove, 7B ... Lower glove, 8 ... Drive circuit, 9 ... Lead wire, 11 ... LED.

Claims (4)

A metal radiator having a wiring insertion hole and a flat surface on one end side;
A columnar part, and a wide part provided on one end side of the columnar part, having a width dimension larger than the width dimension of the columnar part and having a mounting surface orthogonal to the central axis of the lamp on one end side. The cylindrical portion side is attached to the substantially center of the flat surface of the radiator, and the wide portion side is a metal heat conductor provided so as to extend to one end side along the central axis of the lamp;
A light emitting module having a light emitting surface and attached so that the back surface side of the light emitting surface is in surface contact with the mounting surface of the wide portion of the heat conductor;
It has a maximum diameter portion, so that the light emission in the maximum diameter portion module is substantially disposed, and the light-transmitting cover which is provided to cover the thermal conductor and the light emitting module;
A resin holder provided at the other end of the radiator and provided with a through hole;
A drive circuit housed in a resin holder and for driving the light emitting module;
One is connected to the drive circuit, and the other is a lead wire connected to the light emitting module through the through hole of the resin holder and the wiring insertion hole of the radiator.
A mouthpiece provided on the other end side of the heat conductor;
A light bulb shaped lamp characterized by comprising: The translucent cover includes a spherical portion having a maximum diameter portion, and a reduced diameter portion connected to the spherical portion, and an opening end side of the reduced diameter portion is attached to one side of the radiator. The light bulb shaped lamp according to claim 1 . The light bulb shaped lamp according to claim 1 or 2, wherein the heat conductor is a die-cast member made of aluminum. A light bulb shaped lamp according to any one of claims 1 to 3 ;
A luminaire body having a socket in which the bulb lamp is mounted;
The lighting fixture characterized by comprising.

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