JP6055458B2 - Lighting device - Google Patents

Description

  Embodiments described herein relate generally to a lighting device.

In general, in an illumination device using LEDs, an LED that generates light is arranged on one surface of a base, and LE
A spherical globe is provided so as to cover D, and light from the LED is diffused and emitted to the outside. In such an illuminating device, the heat from the LED is transferred to the base and radiated from the other surface (heat radiating surface) in contact with the outside air of the base to the outside.

In the lighting device using LED, the lighting device using an ordinary filament (incandescent light bulb, etc.)
The realization of the total luminous flux (a scale indicating the degree of brightness of the light emitted from the LED) is required.

In order to increase the total luminous flux, it is necessary to use a higher-brightness LED, so the amount of heat generated from the LED increases accordingly. The heat generated by the LED affects the LED element itself and the circuit board of the power supply circuit, etc., and the performance of the LED element and circuit board will deteriorate, improving the heat dissipation performance of the lighting device. In order to achieve this, it is necessary to increase the surface area of the heat dissipation surface of the base.

Therefore, in order to improve the heat dissipation performance, it is necessary to increase the size of the lighting device.

JP 2010-198807 A

  Provided is a lighting device with improved heat dissipation performance without increasing the size of the lighting device.

An illumination device according to an embodiment includes a light source that emits light, an outer surface, a hollow heat transfer member on which the light source is placed on the outer surface, the light source, and at least a part of the outer surface. And a light guide member covering the line.

The block diagram of the illuminating device which concerns on 1st embodiment. The block diagram which shows the example of the rotation mechanism of the mounting member used for the illuminating device which concerns on 1st embodiment. Explanatory drawing of the function of the 1st member used for the illuminating device which concerns on 1st embodiment. Explanatory drawing of the function of the light guide member used for the illuminating device which concerns on 1st embodiment. Explanatory drawing of the flow of the air around the illuminating device which concerns on 1st embodiment. The block diagram which shows the 1st modification of the illuminating device which concerns on 1st embodiment. The block diagram which shows the 2nd modification of the illuminating device which concerns on 1st embodiment. The block diagram of the illuminating device which concerns on 2nd embodiment. The block diagram of the illuminating device which concerns on 3rd embodiment. The block diagram which shows the modification of a glove part.

  Hereinafter, embodiments for carrying out the invention will be described.

(First embodiment)
FIG. 1 is a configuration diagram of an illumination device 100 according to the first embodiment. 1A is an external view of the lighting device 100, FIG. 1B is a cross-sectional view of the lighting device 100 taken along a plane including the axis (AA line) in FIG. 1A, and FIG. c) shows the illumination device 100 in the direction of arrow X in FIG.
FIG. 1D is an enlarged view of a region (S1) surrounded by a broken line in FIG.

  Hereinafter, the configuration of the illumination device 100 will be described in detail.

In this embodiment, the case where the illuminating device 100 is mounted | worn by the socket provided in the indoor ceiling etc. as an example is assumed. At this time, the gravity direction is defined as the lower side, and the ceiling direction is defined as the upper side based on the lighting device 100.

The lighting device 100 in FIG. 1A is configured such that when the lighting device 100 functions as lighting, the globe unit 10 from which light is emitted from the surface and the lighting device 100 are screwed into a socket (not shown), for example. When fixing, the base part 20 which becomes an electrical and mechanical connection part is provided.
In the present embodiment, the illumination device 100 has a symmetrical shape with the axis in FIG. Hereinafter, this axis (the axis of symmetry of the illumination device 100) is referred to as the central axis of the illumination device 100.

As shown in FIG. 1, in the state where the central axis direction of the lighting device 100 and the direction of gravity are aligned and mounted on the socket, the lighting device 100 has the base portion 20 positioned on the upper side and the globe portion 10 positioned on the lower side. To do. When power is supplied to the socket by an indoor power source or the like, light is emitted from the surface of the globe 10 and the lighting device 100 functions as illumination.

(Glove part)
As shown in FIG. 1 (b), the globe unit 10 includes a hollow heat transfer member 11, a light guide member 12 provided so as to cover the heat transfer member 11 along the shape of the heat transfer member 11, and a heat transfer member. A light source 13 placed on the surface of the heat member 11 and a first member 14 that contacts the light guide member 12 and faces the light source 13 through the light guide member 12 are provided.

The heat transfer member 11 is a member that conducts heat generated by the light source 13 inside the heat transfer member 11 and transfers part of the heat to the light guide member 12. The heat transfer member 11 has, for example, a general light bulb shape as shown in FIG. Specifically, as shown in the drawing, the heat transfer member 11 includes a spherical head portion 11a and a truncated cone-shaped body portion 11b which are integrally formed. The trunk portion 11b has an opening at one end in the central axis direction. In addition, as a material of the heat-transfer member 11, it is preferable to use the metal material which is excellent in heat conductivity, such as aluminum. Moreover, although the inside of the heat transfer member 11 is filled with air, a reduced pressure atmosphere lower than the atmospheric pressure may be used. Below, the heat transfer member 11
Is defined as a first inner surface, and a surface opposite to the first inner surface is defined as a first outer surface (surface).

The light guide member 12 is a light transmissive member such as glass or synthetic resin, and guides light inside. As the shape of the light guide member 12, similarly to the heat transfer member 11, it has a spherical head portion 12 a and a truncated cone-shaped body portion 12 b. Below, the surface which contacts the 1st outer surface of the heat-transfer member 11 of the light guide member 12 directly or indirectly through the below-mentioned sheet | seat (not shown) is made into the 2nd inner surface, this 2nd.
A surface opposite to the inner surface is defined as a second outer surface (surface). On the second inner surface or the second outer surface of the light guide member 12, in order to scatter light, a scattering mark 30 formed by, for example, silk printing or cutting is provided over the entire surface.

The first outer surface of the heat transfer member 11 and the second inner surface of the light guide member 12 are bonded to each other with heat transfer thermal grease or adhesive material (for example, heat conductivity 1.0 to 100 W / mK) having excellent heat conductivity. (
Can be fixed by contact). As will be described later, when the heat of the heat transfer member 11 is released to the outside of the lighting device 100 via the light guide member 12, the contact thermal resistance between the heat transfer member 11 and the light guide member 12 is small. It is because it is so preferable.

Further, when the lighting device 100 functions as illumination, the light guide member 12 has a high temperature (about 125 ° C.) in the vicinity of the light source 13, so that the material is polycarbonate (visible light transmittance) having excellent heat resistance. 90%) or cycloolefin polymer (visible light transmittance 92%) is preferably used.

The light source 13 is a chip having a plate-like substrate on which one or more light emitting elements (not shown) such as LEDs are mounted on one surface, and generates visible light such as white light. As an example, when a light-emitting element that generates blue-violet light having a wavelength of 450 nm is used, the light-emitting element is sealed with a resin material or the like containing a phosphor that absorbs blue-violet light and generates yellow light having a wavelength of about 560 nm. As a result, blue-violet light and yellow light are mixed, and as a result, the light source 13 generates white light.

The light source 13 transmits the surface opposite to the surface on which the light emitting element of the substrate is provided through a heat conductive sheet (not shown) having electrical insulation and excellent thermal conductivity. It is preferable to be provided on the first outer surface of the heat member 11. As will be described later, in order to transmit the heat generated by the light source 13 to the heat transfer member 11, it is preferable that the contact thermal resistance between the light source 13 and the heat transfer member 11 is as small as possible. This is because the member 11 is preferably electrically insulated. At this time, the surface on which the light emitting element of the light source 13 is provided is the second surface of the light guide member 12.
Contact the inner surface.

Thus, since the light source 13 is mounted on the first outer surface of the heat transfer member 11, the lighting device 100 is used.
In the design stage, since the installation position of the light source 13 can be appropriately determined between the heat transfer member 11 and the light guide member 12, the degree of freedom of the arrangement position of the light source 13 is increased.

In the present embodiment, the light source 13 is located between the heat transfer member 11 and the light guide member 12 in the central axis direction (that is, the direction of gravity) of the lighting device 100 in a state where the lighting device 100 is mounted on the socket. It is provided at the tip located at the bottom, more specifically at the tip of the spherical head 11a.

As will be described later, the air flowing around the lighting device 100 flows in the reverse direction of gravity by natural convection, but by providing the light source 13 at the tip in the direction of gravity in this way, the air can be efficiently used by cooler air. The glove part 10 can be cooled.

The first member 14 is a member that reflects a part of the light incident from the light source 13 into the light guide member 12 into the light guide member 12 and transmits the remaining light to the external space of the illumination device 100. First member 14
With the heat transfer member 11 and the light guide member 12 fixed, the curved surface faces the light source 13 at a position that contacts the light guide member 12 and faces the light source 13 through the light guide member 12. Provided. As the first member 14, for example, a beam splitter can be used.

The first member 14 only needs to reflect a part of the light from the light source 13 into the light guide member 12. Instead of the beam splitter, light such as milky white glass, milky white acrylic, or milky white polycarbonate is used. A scattering member can also be used. In this case, a part of the scattered light is reflected into the light guide member 12.

(Base part)
As shown in FIG. 1B, the base portion 20 is provided inside the mounting member 21 with a conductive mounting member 21 provided in the opening of the heat transfer member 11, and supplies power to the light source 13. Power supply circuit 22 is provided.

The mounting member 21 is a member having a female screw or a male screw formed on the surface for mounting in the socket. In the present embodiment, the mounting member 21 has a hollow cylindrical shape having one end opened and a rotating shaft serving as a rotation center when the mounting member 21 is mounted on the socket. As a material, it is preferable to use a metal material such as conductive aluminum. In the present embodiment, the rotation axis of the mounting member 21 coincides with the central axis of the lighting device 100.

The power supply circuit 22 is provided by being sealed in a case 23 made of, for example, resin that is fixed inside the mounting member 21, and supplies power supplied from the socket to the light source 13. Specifically, since an AC voltage is applied from the indoor socket, the power supply circuit 22 has an AC voltage (for example,
100V) and converted to a DC voltage, the DC voltage is applied to the light source 13. The mounting member 21 and the power supply circuit 22 are electrically connected. Further, the power supply circuit 22
And the light source 13 are electrically connected by a wiring 25.

Depending on the indoor design, when the lighting device 100 is mounted on the socket, the central axis direction of the lighting device 100 may not coincide with the direction of gravity. In this case, the light source 13
Is not necessarily provided at the tip of the lighting device 100 in the central axis direction, and is preferably provided at the tip of the heat transfer member 11 in the gravitational direction when mounted on the socket. At this time, the heat transfer member 11 and the mounting member 21 are electrically insulated, and the heat transfer member 11
Is connected to the mounting member 21 so as to be rotatable about a rotation axis.

Accordingly, when the lighting device 100 is mounted on the socket, when the center axis direction of the lighting device 100 does not coincide with the direction of gravity, the user manually rotates the globe 10 to transfer the position of the light source 13 to the heat. It can be brought close to the tip of the member 11 in the direction of gravity.

FIG. 2 is a diagram illustrating an example of the rotation mechanism of the mounting member 21. 2 is an enlarged view of a region (S2) surrounded by a broken line in FIG. In the example of FIG. 2, the first heat transfer member 11
The first fitting member 24 a provided on the inner surface and the second fitting member 24 b provided on the case 23 fixed inside the mounting member 21 are fitted to each other, whereby the mounting member 21 is rotated. At this time, it is also possible to limit the rotation angle within a predetermined range by providing a stopper (not shown).

(Description of function)
Hereinafter, the function of the illumination device 100 will be described in detail with reference to FIGS. 3 to 7.

FIG. 3 is a diagram illustrating the function of the first member 14. FIG. 4 is a diagram illustrating the function of the light guide member 12, and FIG. 5 is a diagram illustrating the flow of air around the lighting device 100.

When power is supplied to the socket by an indoor power source or the like in a state where the base part 20 of the lighting device 100 is attached to a socket provided on the ceiling or the like of the room, the power circuit 22 is connected to the power source circuit 22 via the member 21 of the base part 20. On the other hand, an alternating voltage is supplied. Further, a constant current is supplied to the light source 13 through the power supply circuit 22. Thereby, the light source 13 emits light.

The light emitted from the light source 13 enters the first member 14 provided at a position facing the light source 13. A part of the light travels straight through the first member 14 or is refracted by the first member 14 and is transmitted to the external space of the lighting device 100 (FIG. 3).

Further, part of the light is reflected at the interface between the light guide member 12 and the first member 14, and the light guide member 1.
2 is incident. Among these, the light satisfying the total reflection condition (reflection angle θ> critical angle θm) at the interface between the light guide member 12 and the external space is the interface between the light guide member 12 and the external space, and the light guide member 12.
The light guide member 12 is guided (propagated) while repeating total reflection at the interface between the heat transfer member 11 and the heat transfer member 11 (FIG. 4A).

Light that is scattered by the scattering mark 30 and does not satisfy the total reflection condition is emitted from the light guide member 12 to the external space without being totally reflected at the interface between the light guide member 12 and the external space. Thereby, light is inject | emitted from the 2nd outer surface of the light guide member 12, ie, the whole surface of the glove | globe part 10, (FIG.4 (b)).

At this time, heat is generated in the light source 13 as the light emitting element emits light. This heat is transmitted from the light source 13 to the heat transfer member 11 through the sheet. Then, the heat transferred to the heat transfer member 11 transfers through the heat transfer member 11. Furthermore, the heat transferred inside the heat transfer member 11 is transferred from the heat transfer member 11 to the light guide member 12. At this time, as described above, between the light source 13 and the heat transfer member 11 and the heat transfer member 11.
And the light guide member 12 are thermally connected to each other by a member having excellent thermal conductivity, so that heat can be efficiently transferred.

Further, since the light source 13 is in contact with the light guide member 12, heat can be directly transferred to the light guide member 12 without using the heat transfer member 11.

As described above, the heat transmitted to the light guide member 12 is transmitted from the second outer surface of the light guide member 12 to the lighting device 100.
The heat is dissipated in the external space. At this time, since heat can be radiated from the entire second outer surface of the light guide member 12, heat can be efficiently discharged from the lighting device 100 by radiating heat from a wide area.

In the present embodiment, the light guide member 12 is described as an example of a configuration that covers the entire first outer surface of the heat transfer member 11, but covers a part of the heat transfer member 11 (for example, only the head 11a). In this case, in addition to the heat radiation from the second outer surface of the light guide member 12, the first heat transfer member 11 may be configured.
It is also possible to radiate heat directly from the outer surface.

The heat resistance of the light guide member 12 affects the heat radiation from the light guide member 12. The thermal resistance R (K / W) of a flat plate having a thickness l (m), a surface area A (m ² ), and a thermal conductivity k (W / mK) is given by l / (kA). In order not to inhibit the heat radiation from the light guide member 12, the thermal resistance R is preferably set to 3 (K / W) or less.

For example, when the light guide member 12 has a thickness l = 0.005 (m) and a surface area A = 0.01 (m ² ), the thermal resistance is 2.5 if polycarbonate or acrylic (thermal conductivity k≈0.2 (W / mK)). If it is about (K / W) or glass (thermal conductivity k≈1.25 (W / mK)), it will be about 0.4 (K / W).

The heat exhausted from the lighting device 100 warms the temperature around the lighting device 100. And
As shown in FIG. 5, the heated air rises along the periphery of the lighting device 100 through the surface of the glove part 10 and the surface of the base part 20 by natural convection to the upper side, that is, in the reverse direction of gravity. The surface of the lighting device 100 is further cooled by this air flow.

At this time, as the air flows upward along the periphery of the lighting device 100, the temperature of the flowing air gradually increases. That is, the temperature of the upstream air in the vicinity of the tip of the glove part 10 in the gravity direction is the lowest, and the temperature of the downstream air rises as the cap part 20 is approached. On the other hand, in the globe part 10, the vicinity of the light source 13 is the highest temperature.

A difference between the temperature of the surface of the lighting device 100 and the temperature of the surrounding air (hereinafter, temperature difference ΔT) affects the heat transfer for discharging heat from the lighting device 100. That is, the amount of heat discharged by heat transfer is proportional to the temperature difference ΔT.

Therefore, by providing the light source 13 at the tip of the heat transfer member 11 in the gravitational direction as in the present embodiment, ΔT can be increased compared to the case where it is provided on the downstream side, and the lower temperature on the upstream side is lower. The glove part 10 can be efficiently cooled by air.

Furthermore, since the light source 13 is provided at a location relatively close to the surface of the globe part 10,
Most of the heat from the light source 13 can be directly discharged from the light guide member 12 to the outside, and the globe portion 10 can be efficiently cooled.

Moreover, in this embodiment, since the arrangement position of the light source 13 is the front-end | tip of the center axis direction of the illuminating device 100, the light from the light source 13 guides the inside of the light guide member 12 with symmetry. ,
The luminance distribution can be made to approach uniformly over the entire surface of the light guide member 12. That is, the unevenness of the luminance distribution within the second outer surface of the light guide member 12 can be reduced.

In the lighting device 100 of the present embodiment, the light guide member 12 that is divided into two at the cross section including the central axis is bonded to the heat transfer member 11 in a state where the light source 13 is provided on the heat transfer member 11. At the same time, the cross section of the divided light guide member 12 can be similarly produced by bonding them with thermal grease, an adhesive, or the like.

In addition, although the case where the light source 13 and the light guide member 12 are in contact has been described as an example, a space is provided between the light source 13 and the light guide member 12 as in the first modification shown in FIG. The structure which opposes may be sufficient. In this case, for example, by providing the heat transfer member 11 with an opening 40 that communicates the space between the light source 13 and the light guide member 12 and the space inside the heat transfer member 11, The high temperature air can be immediately separated from the light source 13 by circulating the air whose temperature rises inside the heat transfer member 11 and discharging the air to the outside space of the lighting device 100 through an opening (not shown).

Moreover, although the example using the material which can permeate | transmit a part of light from the light source 13 was demonstrated as the 1st member 14, a metal material etc. can also be used, for example. In this case, light is not irradiated directly under the first member 14, but light having a higher luminous intensity can be guided into the light guide member 12. Further, as in the second modified example shown in FIG. 7, the light source 13 is connected to the heat transfer member 11 so that the light from the light source 13 enters along the second inner surface (or second outer surface) of the light guide member 12. It can also be provided on the side. In this case, the first member 14 is not necessarily provided.

According to the illumination device 100 of the present embodiment, since the light source 13 is provided between the heat transfer member 11 and the light guide member 12, heat can be efficiently radiated, and the heat dissipation performance of the illumination device 100 is improved. It becomes possible.

Moreover, since it is not necessary to separately provide a base for supporting the light source as compared with a general LED lighting device as described in the background, the surface area of the globe part 10 can be increased, and only that much. The light distribution angle can be improved. Moreover, the temperature rise of the power supply circuit 22 can be prevented by separating the light source 13 from the power supply circuit 22.

(Second embodiment)
FIG. 8 is a configuration diagram of the illumination device 200 according to the second embodiment. 8A is an outline view of the lighting device 200, FIG. 8B is a cross-sectional view of the lighting device 200 taken along a plane including the axis (BB line) in FIG. 8A, and FIG. c) shows the lighting device 200 in the direction of arrow Y in FIG.
FIG.

The lighting device 200 is different from the lighting device 100 of the first embodiment in that the globe unit 10 includes the second member 15. In addition, about the structure same as the illuminating device 100 of 1st embodiment, description is abbreviate | omitted by attaching | subjecting the same code | symbol.

The second member 15 is provided on the second outer surface in the vicinity of the discontinuous portion (the boundary between the head portion 12a and the trunk portion 12b) of the light guide member 12, and after guiding the inside of the head portion 12a, This is a member that reflects a part of the light entering into the body 12b into the body 12b and diffuses a part of the light and transmits it to the external space. Second member 1
5 changes the reflection angle at the interface between the body 12b and the external space of the light entering the body 12b so as to satisfy the total reflection condition.

As the second member 15, for example, a beam splitter can be used as in the first member 14. Also, instead of a beam splitter, milky white glass or acrylic,
Polycarbonate or the like can also be used.

In the discontinuous part of the light guide member 12, when light that satisfies the total reflection condition and is guided in the head part 12a enters the trunk part 12b that is discontinuously connected to the head part 12a. It is conceivable that the total reflection condition is not satisfied.

Therefore, by providing the second member 15 in such a discontinuous portion, the reflection angle of the light entering the trunk portion 12b at the interface between the light guide member 12 and the external space is changed. Thereby, the light that enters the trunk portion 12b satisfies the total reflection condition again and guides the inside of the trunk portion 12b.

Even when the curvature of the head portion 12a is large, it is conceivable that the light guide is hindered in the same manner as when the discontinuous portion is provided. At this time, the second member 15 is partially formed on the second outer surface of the head 12a.
Can also be provided.

According to the illuminating device 200 of this embodiment, the light guide in the light guide member 12 can be assisted by providing the 2nd member 15 in the position where the reflection angle of light changes and it does not satisfy | fill total reflection conditions. . Thereby, it is possible to make the luminance distribution of the light uniformly approach the entire surface of the light guide member 12.

(Third embodiment)
FIG. 9 is a configuration diagram of a lighting apparatus 300 according to the third embodiment. 9A is an external view of the lighting device 300, FIG. 9B is a cross-sectional view of the lighting device 300 taken along a plane including the axis (CC line) in FIG. 9A, and FIG. FIG. 9C is a view of the lighting device 300 viewed from above in the arrow Z direction in FIG.

The lighting device 300 of the first embodiment is that the heat transfer member 11 and the light guide member 12 of the globe unit 10 have one or more first through holes 16a and second through holes 16b.
Different from zero. In addition, about the structure same as the illuminating device 100 of 1st embodiment, description is abbreviate | omitted by attaching | subjecting the same code | symbol.

In the present embodiment, each of the heat transfer member 11 and the light guide member 12 has one or a plurality of first through holes 16a and second through holes 16b. The first through hole 16 a penetrates the heat transfer member 11 and the light guide member 12, and air flows into the hollow of the heat transfer member 11. The second through hole 16b is
Similarly, air passes through the heat transfer member 11 and the light guide member 12, and air flows out from the hollow space of the heat transfer member 11 to the external space. In addition, it is preferable to provide the 1st through-hole 16a near the front-end | tip of the gravity direction of the heat-transfer member 11 and the light guide member 12. FIG. As a result, the air is convected by the lighting device 30.
Since the air rises upward from the vicinity of the tip in the direction of gravity along the circumference of 0, air easily flows into the hollow of the heat transfer member 11.

Since low-temperature air flows into the heat transfer member 11 by natural convection through the first through hole 16a, the air temperature inside the heat transfer member 11 decreases, and the first outer surface of the heat transfer member 11 In addition, the first inner surface of the heat transfer member 11 also functions as a heat radiating surface. The air that has flowed into the heat transfer member 11 and has been warmed flows out to the external space of the lighting device 300 through the second through hole.

Thereby, the thermal radiation performance of the illuminating device 300 can be improved. Heat transfer member 1
A fin or the like (not shown) that expands the heat radiation area may be provided on the first inner surface of 1.

In the above embodiment, the case of using the globe part 10 having a general light bulb shape (spherical head and truncated cone body) has been described as an example. However, as shown in FIG. A spherical illumination device (FIG. 10A), or an illumination device in which the globe 10 is cylindrical (FIG. 10B).
) Etc., various shapes may be used.

In addition, in order to give asymmetry to the light distribution, for example, the globe part 10 having an elliptical cross section perpendicular to the central axis of the lighting device may be used.

Moreover, you may provide a storage battery in the inside of the heat-transfer member 11 of an illuminating device. Thereby, the illuminating device can maintain light emission for a definite period of time also at the time of a power failure by charging at the time of electricity supply. In addition, you may provide the injection mechanism etc. which inject | pour a fire extinguishing material at the time of a fire inside the heat-transfer member 11 of an illuminating device.

According to the lighting device of at least one embodiment described above, it is possible to improve the heat dissipation performance without increasing the size of the lighting device.

These embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention and are also included in the invention described in the claims and the equivalents thereof.

  The invention described in the scope of claims at the time of the patent assessment of the original application of the present application will be appended below.

[1] a light source that emits light;
A hollow heat transfer member having an outer surface, on which the light source is mounted on the outer surface;
A light guide member that covers the light source and at least a part of the outer surface along the outer surface;
With
A cylindrical base provided in a part of the heat transfer member, comprising a base having a central axis passing through the center of a circle,
The said heat-transfer member is an illuminating device which can be rotated with respect to the said nozzle | cap | die centering | focusing on the said central axis.

[2] a light source that emits light;
A hollow heat transfer member having an outer surface, on which the light source is mounted on the outer surface;
A light guide member that covers the light source and at least a part of the outer surface along the outer surface;
A cylindrical base provided in a part of the heat transfer member, comprising a base having a central axis passing through the center of a circle,
The light source is located on the central axis;
The light guide member is a lighting device having a flat portion at a location facing the light source.

[3] a light source that emits light;
A hollow heat transfer member having an outer surface, on which the light source is mounted on the outer surface;
A light guide member that covers the light source and at least a part of the outer surface along the outer surface;
A cylindrical base provided in a part of the heat transfer member, comprising a base having a central axis passing through the center of a circle,
The light source is located on the central axis;
The light guide member has an inner surface that directly or indirectly contacts the outer surface and a second outer surface opposite to the inner surface;
A scattering mark provided over the entire inner surface or the second outer surface;
A lighting device comprising:

[4] a light source that emits light;
A hollow heat transfer member having a spherical head and a truncated cone-shaped body, the light source being placed on the outer surface of the spherical head;
The light source, and a light guide member covering the outer surface of the spherical head and the outer surface of the truncated cone shape;
A cylindrical base provided in a part of the heat transfer member, comprising a base having a central axis passing through the center of a circle,
An illumination device in which the light source is located on the central axis.

[5] a light source that emits light;
A hollow heat transfer member having an outer surface, on which the light source is mounted on the outer surface;
A light guide member that covers the light source and at least a part of the outer surface along the outer surface;
A cylindrical base provided in a part of the heat transfer member, comprising a base having a central axis passing through the center of a circle,
The light source is located on the central axis;
A storage battery provided inside the heat transfer member;
A lighting device comprising:

[6] The light guide member is fixed to the outer surface of the heat transfer member via an adhesive member [1]
[5] The illumination device according to any one of [5].

[7] A cylindrical base provided in a part of the heat transfer member, the base having a central axis passing through the center of a circle,
The lighting device according to [1], wherein the light source is located on the central axis.

[8] A cylindrical base provided in a part of the heat transfer member, the base having a central axis passing through the center of a circle,
The lighting device according to any one of [2] to [6], wherein the heat transfer member is rotatable with respect to the base around the central axis.

[9] The illumination device according to any one of [1] to [8], further including a reflecting member that is in contact with the light guide member and is provided to face the light source via the light guide member.

[10] [1] to [9] having a through hole penetrating the heat transfer member and the light guide member
The lighting apparatus in any one.

[11] The illumination device according to [10], wherein the reflecting member transmits a part of the light emitted from the light source to the outside.

[12] The illumination device according to any one of [1] to [11], wherein the light guide member guides light emitted from the light source along an outer surface of the heat transfer member and emits the light to the outside. .

[13] Provided in the vicinity of the boundary between the outer surface of the head and the outer surface of the torso, part of light entering the torso from the head is reflected to the torso, and part of the light is external space [4] The illumination device according to [4], further including a member that transmits the light.

DESCRIPTION OF SYMBOLS 10 ... Globe part 11 ... Heat-transfer member 11a ... Head part 11b ... Body part 12 ... Light guide member 12a ... Head part 12b ... Body part 13 ... Light source 14 ... 1st member 15 ... 2nd member 16a ... 1st through-hole 16b ... 2nd through-hole 20 ... mouthpiece part 21 ... mounting member 22 ... power supply circuit 23 ... Case 24a ... first fitting member 24b ... second fitting member 25 ... wiring 30 ... scattering mark 40 ... opening 100, 200, 300 ... lighting device

Claims (5)

A light source that emits light;
A hollow heat transfer member having an outer surface;
A light guide member that covers at least a portion of the outer surface along the outer surface and guides light emitted from the light source;
A cylindrical base provided outside the heat transfer member;
A storage battery provided inside the heat transfer member;
A lighting device comprising: power supply means provided at least in part inside the base and supplying power to the light source .   The lighting device according to claim 1, wherein the light guide member is fixed to the outer surface of the heat transfer member via an adhesive member.   The lighting device according to claim 1, wherein the light source is located on a central axis passing through a center of a circle of the base.   The lighting device according to claim 1, wherein the heat transfer member is rotatable with respect to the base around the central axis.   The lighting device according to any one of claims 1 to 4, wherein the light guide member guides light emitted from the light source along an outer surface of the heat transfer member and emits the light to the outside.

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