JP2018028985A - Luminaire and heat sink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire which can be installed on an attic having a low height from an opening having a small diameter and secure a sufficient heat radiation amount.SOLUTION: A luminaire includes: a light source 60 which emits laser light; an elongated heat sink 70 which houses the light source 60 and radiates heat from the light source 60; an optical fiber 40 which guides the laser light emitted from the light source 60; and a lamp fitting unit 20 which converts the laser light guided by the optical fiber 40 into a different wavelength to emit light having a predetermined color. The heat sink 70 has a first bending part (a first hinge 73) which can bend relative to a longitudinal direction of the heat sink 70.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an illumination device using laser light as a light source and a heat sink provided in the illumination device.

  2. Description of the Related Art Conventionally, a technique is known in which a phosphor is emitted using laser light as excitation light, converted into a desired light color, and illuminated (see, for example, Patent Document 1). When such a technique is applied to a downlight type illumination device, a laser unit that emits laser light and a lamp unit that emits illumination light caused by the laser light can be separated. Thereby, it becomes possible to make a lamp small. By reducing the size of the lamp, it is possible to reduce the opening for attaching the lamp unit to the ceiling, and thus it is possible to realize various design features of the illumination space.

JP2013-254689A

  Here, when the lighting device is installed, there is a case where the laser unit is inserted from the opening of the ceiling and placed behind the ceiling. The laser unit includes a semiconductor laser element that emits laser light and a heat sink for cooling the semiconductor laser element. However, it is necessary to make the heat sink small so that the laser beam can enter the opening. If the heat sink is made smaller, the heat radiation amount of the entire heat sink is also reduced, and there is a possibility that the semiconductor laser element cannot be reliably cooled. On the other hand, as a cross-sectional area where the heat sink can be inserted into the opening, it is also considered to increase the heat dissipation by making it long, but in such a case, the heat sink hits the ceiling surface of the ceiling behind the insertion, There is a possibility that a heat sink cannot be placed behind the ceiling.

  Therefore, an object of the present invention is to provide a lighting device and a heat sink that can be installed from a small-diameter opening with respect to a low ceiling, and that can secure a sufficient heat dissipation amount. is there.

  An illumination device according to one embodiment of the present invention includes a light source that emits laser light, a long heat sink that houses the light source and radiates heat from the light source, and an optical fiber that guides the laser light emitted from the light source. A lamp unit that emits light of a predetermined color by converting the laser light guided by the optical fiber to a different wavelength, and the heat sink has a first bent portion that can be bent in the longitudinal direction of the heat sink.

  A heat sink according to another aspect of the present invention is a long heat sink that houses a light source that emits laser light and dissipates heat from the light source, and is a bent portion that can be bent with respect to the longitudinal direction of the heat sink. Have

  ADVANTAGE OF THE INVENTION According to this invention, while being installable from a small-diameter opening part with respect to the low ceiling, the illuminating device and heat sink which can ensure sufficient heat dissipation can be provided.

It is sectional drawing which shows the usage condition of the illuminating device which concerns on embodiment. It is a front view which shows schematic structure of the laser unit which concerns on embodiment. It is a schematic diagram which shows the 1st process of the construction method of the illuminating device which concerns on embodiment. It is a schematic diagram which shows the 2nd process of the construction method of the illuminating device which concerns on embodiment. It is a schematic diagram which shows the 3rd process of the construction method of the illuminating device which concerns on embodiment. It is a schematic diagram which shows the 4th process of the construction method of the illuminating device which concerns on embodiment. 6 is a cross-sectional view illustrating a schematic configuration of a heat sink according to Modification 1. FIG. 10 is a cross-sectional view illustrating a schematic configuration of a heat sink according to Modification 2. FIG. 10 is a cross-sectional view showing a schematic configuration of a heat sink according to Modification 3. FIG. It is sectional drawing which shows the bent state of the heat sink which concerns on the modification 3.

  Below, the illuminating device which concerns on embodiment of this invention is demonstrated using drawing. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement of components, connection forms, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a mimetic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected about the same structural member.

(Embodiment)
Hereinafter, embodiments will be described.

[Configuration of lighting device]
FIG. 1 is a cross-sectional view illustrating a usage mode of the lighting device according to the embodiment.

  As shown in FIG. 1, the illuminating device 1 is a downlight type illuminating device attached to the ceiling of a building. The lighting device 1 includes a laser unit 10, a lamp unit 20, and a power supply unit 30. The laser unit 10 and the lamp unit 20 are optically connected by an optical fiber 40. The laser unit 10 and the power supply unit 30 are electrically connected by a power cable 50. The lighting device 1 is placed on the top surface of the ceiling 2 with the lamp unit 20 inserted into the opening 3 of the ceiling 2. That is, the lighting device 1 is disposed on the ceiling 4 except for a part of the lamp unit 20. For example, if the opening 3 has a circular shape in a plan view with a diameter of Dmm, the height H of the ceiling back 4 is 2.22 × Dmm. Specifically, the diameter D of the opening 3 is 45 mm, and the height H of the ceiling back 4 is 100 mm.

  Next, the laser unit 10 will be described with reference to FIGS. 1 and 2. FIG. 2 is a front view showing a schematic configuration of the laser unit 10 according to the embodiment. Specifically, FIG. 2 is a view of the laser unit 10 in FIG. 1 as viewed from above.

  The laser unit 10 includes a light source 60 and a heat sink 70. The light source 60 is a light source that emits laser light. The light source 60 is, for example, a semiconductor laser element that emits laser light having a wavelength of bluish purple to blue (430 to 490 nm). Laser light emitted from the light source 60 enters the optical fiber 40 from a light incident surface that is one end surface of the optical fiber 40, and is emitted from a light emitting surface that is the other end surface of the optical fiber 40. For this reason, the light incident surface of the optical fiber 40 is disposed so as to face the light source 60.

  As shown in FIGS. 1 and 2, the heat sink 70 is a long heat sink that houses a part of the optical fiber 40 and the light source 60 and radiates heat from the light source 60. The heat sink 70 has a cross-sectional shape in a plane perpendicular to the longitudinal direction that is smaller than the opening 3 over the entire length. For this reason, the heat sink 70 can be accommodated in the ceiling back 4 from the opening 3.

  The heat sink 70 includes a first bent portion that can be bent with respect to the longitudinal direction of the heat sink 70. Specifically, the heat sink 70 is formed in a rectangular parallelepiped shape and is divided into a first heat radiating portion 71 and a second heat radiating portion 72. The first heat radiating portion 71 and the second heat radiating portion 72 are connected by a first hinge 73 that is a first bent portion. Thereby, one of the first heat radiating portion 71 and the second heat radiating portion 72 is rotatable about the first hinge 73 with respect to the other. The total length L of the heat sink 70 in a state where the first heat radiating portion 71 and the second heat radiating portion 72 are arranged in a straight line is longer than the height H of the ceiling back 4. Further, the first hinge 73 is disposed at the center in the longitudinal direction of the heat sink 70. For this reason, each full length L1, L2 of the 1st thermal radiation part 71 and the 2nd thermal radiation part 72 becomes equivalent. The total lengths L1 and L2 are shorter than the height H of the ceiling back 4. And the 1st thermal radiation part 71, the 2nd thermal radiation part 72, and the 1st hinge 73 are formed with the metal with comparatively high heat conductivity, such as aluminum and copper, for example.

  The first heat radiating portion 71 is formed in a hollow rectangular parallelepiped shape, and the light source 60 is attached therein. Specifically, a concave portion 712 extending along the longitudinal direction of the first heat radiating portion 71 is formed on the joint surface 711 of the first heat radiating portion 71 with the second heat radiating portion 72. A light source 60 is installed on the bottom surface. Further, a through hole 713 extending along the longitudinal direction of the first heat radiating portion 71 is formed on the bottom surface of the recess 712. A power cable 50 is connected to the light source 60 through the through hole 713. In addition, a locking portion 77 that locks the second heat radiating portion 72 that is linearly arranged with respect to the first heat radiating portion 71 is provided on one side surface of the first heat radiating portion 71.

  The second heat radiating portion 72 is formed in a rectangular parallelepiped shape, and a slit 721 along the longitudinal direction is formed on the outer surface of the second heat radiating portion 72 over the entire length of the second heat radiating portion 72. By this slit 721, the optical fiber 40 protrudes outward from the second heat radiating portion 72 and is greatly curved. That is, refraction of the optical fiber 40 at the time of construction or after construction can be suppressed, and damage to the optical fiber 40 can be prevented. Further, the joint surface 722 of the second heat radiating portion 72 with the first heat radiating portion 71 is the joint surface 711 of the first heat radiating portion 71 in a state where the first heat radiating portion 71 and the second heat radiating portion 72 are arranged in a straight line. Close contact with. This adhesion is maintained by the locking portion 77 locking the second heat radiating portion 72 to the first heat radiating portion 71. Even if the first heat radiating portion 71 and the second heat radiating portion 72 are not in close contact with each other, the first hinge 73 serves as a heat transfer path, so that the first heat radiating portion 71 passes through the first hinge 73 to the second heat radiating portion 72. Heat can be dissipated even from the second heat dissipating part 72 by moving the heat. However, as described above, when the first heat radiating portion 71 and the second heat radiating portion 72 are in close contact with each other, more heat can be transmitted to the second heat radiating portion 72, and heat dissipation can be improved.

  Next, the lamp unit 20 will be described with reference to FIG.

  The lamp unit 20 is a downlight that emits light of a predetermined color by converting laser light into different wavelengths. Specifically, the lamp unit 20 includes a housing 21, a holding unit 22, a light emitting unit 80, and a lens 90.

  The casing 21 is a casing having an outer appearance that houses the holding unit 22, the light emitting unit 80, and the lens 90. The diameter of the casing 21 is set smaller than the diameter D of the opening 3 so that the casing 21 is inserted into the opening 3 of the ceiling 2. The casing 21 is made of a metal having a relatively high thermal conductivity such as aluminum or copper.

  The holding unit 22 is a cylindrical member that holds the optical fiber 40 and is accommodated in the housing 21 along the central axis of the housing 21. The holding unit 22 is provided with an optical fiber 40 along the central axis of the holding unit 22, and the light emitting surface of the optical fiber 40 is exposed from one end of the holding unit 22.

  The light emitting unit 80 is accommodated in the housing 21 so as to face the light emitting surface of the optical fiber 40. The light emitting unit 80 is an optical element that emits light of a predetermined color by converting the laser light into a different wavelength when irradiated with the laser light from the light emitting surface of the optical fiber 40. The light emitting unit 80 includes a substrate and a fluorescent unit stacked on the substrate. A board | substrate hold | maintains a fluorescence part, for example, is formed from translucent materials, such as glass and sapphire. The fluorescent part includes, for example, phosphor particles that are excited by laser light to emit fluorescence in a dispersed state, and the phosphor emits fluorescence when irradiated with laser light. Specifically, examples of the fluorescent portion include those in which phosphor particles are dispersed inside a base material made of transparent resin or glass, or those obtained by solidifying phosphor particles. That is, it can be said that the fluorescent part is a wavelength conversion member that converts laser light into fluorescence.

  In the case of the present embodiment, the fluorescent part emits white light, and two types of phosphors, a red phosphor that emits red light and a yellow phosphor that emits yellow light, are emitted at an appropriate ratio. include. The fluorescent part may include three types of phosphors: a red phosphor that emits red light by laser light irradiation, a blue phosphor that emits blue light, and a green phosphor that emits green light.

  The type and characteristics of the phosphor are not particularly limited. However, since a relatively high-power laser beam serves as excitation light, it is desirable to have a high heat resistance. In addition, the type of the substrate that holds the phosphor in a dispersed state is not particularly limited, but if the transparency is high, the white light radiation efficiency may be high. In addition, since a laser beam having a relatively high output is incident, one having high heat resistance is preferable.

  The lens 90 is a light distribution control lens that controls the light distribution of the light emitted from the light emitting unit 80. The surface of the lens 90 that faces the light emitting unit 80 has a shape that allows the light emitted from the light emitting unit 80 to be taken into the lens 90 as much as possible. The shape of the facing surface of the lens 90 is optimized on the assumption that the positional relationship (interval) between the lens 90 and the light emitting unit 80 is constant.

  Next, the power supply unit 30 will be described with reference to FIG.

  The power supply unit 30 is a long power supply unit for supplying power to the light source 60. The power supply unit 30 has a cross-sectional shape that is smaller than the opening 3 as viewed from a direction orthogonal to the longitudinal direction over the entire length. For this reason, the power supply unit 30 can be accommodated in the ceiling back 4 from the opening 3.

  The power supply unit 30 includes a second bent portion that can be bent with respect to the longitudinal direction of the power supply unit 30. Specifically, the power supply unit 30 is formed in a rectangular parallelepiped shape and is divided into a first member 31 and a second member 32. The 1st member 31 and the 2nd member 32 are connected by the 2nd hinge 33 which is a 2nd bending part. Thereby, one of the first member 31 and the second member 32 is rotatable about the second hinge 33 with respect to the other. The total length M of the power supply unit 30 in a state where the first member 31 and the second member 32 are arranged in a straight line is longer than the height H of the ceiling back 4. Further, the second hinge 33 is disposed at the center in the longitudinal direction of the power supply unit 30. For this reason, each full length M1, M2 of the 1st member 31 and the 2nd member 32 becomes equivalent. The total lengths M1 and M2 are shorter than the height H of the ceiling back 4.

  The first member 31 includes a first case 311 formed in a hollow rectangular parallelepiped shape, a first substrate 312 disposed in the first case 311, and a first power supply circuit 313 mounted on the first substrate 312. I have.

  The second member 32 is disposed closer to the laser unit 10 than the first member 31. The second member 32 includes a second case 321 formed in a hollow rectangular parallelepiped shape, a second substrate 322 disposed in the second case 321, and a second power supply circuit 323 mounted on the second substrate 322. ing.

  The first case 311 and the second case 321 are made of, for example, resin or metal. The first case 311 and the second case 321 are rotatably connected by the second hinge 33. The first power supply circuit 313 and the second power supply circuit 323 are electrically connected by a flexible wiring 34. The wiring 34 has a certain length of margin when the first member 31 and the second member 32 are arranged in a straight line. For example, the first member 31 is rotated with respect to the second member 32 by the second hinge 33, and the first power supply circuit 313 and the second power supply circuit 323 are separated in the circumferential direction around the second hinge 33. However, the electrical connection between the first power supply circuit 313 and the second power supply circuit 323 is always maintained by extending the wiring 34.

[Construction method of lighting equipment]
Next, the construction method of the illuminating device 1 is demonstrated with reference to FIG.1 and FIG.3 ~ FIG.6. 3-6 is a schematic diagram which shows 1 process of the construction method of the illuminating device 1 which concerns on embodiment. 3 to 6, the parts that are not arranged on the ceiling 4 are illustrated as hanging. However, in practice, the parts are held by the operator and the power cable 50 and the optical fiber 40 are not connected. The load is suppressed.

  As shown in FIG. 3, the operator inserts the first member 31 of the power supply unit 30 into the opening 3 of the ceiling 2 and arranges it on the ceiling 4. At this time, the operator bends the power supply unit 30 by rotating the first member 31 with respect to the second member 32 via the second hinge 33.

  Next, as shown in FIG. 4, the operator inserts the second member 32 of the power supply unit 30 into the opening 3 of the ceiling 2 and arranges it on the ceiling back 4. At this time, the operator arranges the first member 31 and the second member 32 in a straight line, and arranges the power supply unit 30 on the ceiling 4 with the power supply unit 30 extended. Thereby, the power supply unit 30 whose total length M1 is longer than the height of the ceiling back 4 can be smoothly arranged on the ceiling back 4.

  When the power supply unit 30 is arranged, the operator electrically connects an electrical cable (not shown) provided in advance on the ceiling 4 and the first power supply circuit 313 of the first member 31.

  Next, as shown in FIG. 5, the operator inserts the first heat radiating portion 71 of the laser unit 10 into the opening 3 of the ceiling 2 and arranges it on the ceiling back 4. At this time, the operator bends the laser unit 10 by rotating the first heat radiating portion 71 with respect to the second heat radiating portion 72 via the first hinge 73.

  Next, as shown in FIG. 6, the operator inserts the second heat radiating portion 72 of the laser unit 10 into the opening 3 of the ceiling 2 and arranges it on the ceiling back 4. At this time, the operator arranges the first heat radiating portion 71 and the second heat radiating portion 72 in a straight line, and locks the second heat radiating portion 72 with the locking portion 77. And an operator arrange | positions in the ceiling back 4 in the state which extended the heat sink 70. FIG. Thereby, the heat sink 70 whose total length L1 is longer than the height of the ceiling back 4 can be smoothly arranged on the ceiling back 4.

  Next, as shown in FIG. 1, the operator inserts the lamp unit 20 into the opening 3 of the ceiling 2 and fixes the lamp unit 20 to the ceiling 2. Thereby, construction of the lighting device 1 is completed.

[Effects, etc.]
As described above, the lighting device 1 according to the present embodiment includes the light source 60 that emits laser light, the long heat sink 70 that houses the light source 60 and radiates heat from the light source 60, and the light source 60. An optical fiber 40 that guides emitted laser light, and a lamp unit 20 that emits light of a predetermined color by converting the laser light guided by the optical fiber 40 into different wavelengths. The heat sink 70 has a first hinge 73 (first bent portion) that can be bent with respect to the longitudinal direction of the heat sink 70.

  The heat sink 70 according to the present embodiment is a long heat sink that houses a light source 60 that emits laser light and radiates heat from the light source 60, and is freely bent with respect to the longitudinal direction of the heat sink 70. A first bent portion (first hinge 73).

  According to this configuration, since the heat sink 70 has the first hinge 73 that can be bent, the heat sink 70 can be bent by the first hinge 73. By bending the heat sink 70 having a length L longer than the height H of the ceiling back 4, the heat sink 70 can be installed from the opening 3 having a small diameter with respect to the ceiling back 4 having a low height H. In addition, since the total length L of the heat sink 70 is larger than the height H of the ceiling back 4, it is possible to secure a sufficient heat dissipation amount.

  Further, the first hinge 73 is disposed at the center in the longitudinal direction of the heat sink 70.

  According to this configuration, since the first hinge 73 is provided at the center in the longitudinal direction of the heat sink 70, the heat sink 70 can be bent with a good balance, and workability during construction can be improved.

  The first bent portion is the first hinge 73.

  According to this configuration, since the first bent portion is the first hinge 73, the heat sink 70 can be bent with a simple structure.

  The illumination device 1 also includes a long power supply unit 30 for supplying power to the light source 60 and a power cable 50 that electrically connects the power supply unit 30 and the light source 60. The power supply unit 30 has a second hinge 33 (second bent portion) that can be bent with respect to the longitudinal direction of the power supply unit 30.

  According to this configuration, since the power supply unit 30 has the bendable second hinge 33, the power supply unit 30 can be bent by the second hinge 33. The power supply unit 30 can be installed from the small-diameter opening 3 with respect to the ceiling back 4 having a low height H by bending the power supply unit 30 having a total length M longer than the height H of the ceiling back 4. .

  Further, the second hinge 33 is disposed at the center in the longitudinal direction of the power supply unit 30.

  According to this structure, since the 2nd hinge 33 is provided in the center part in the longitudinal direction of the power supply unit 30, the power supply unit 30 can be bent with sufficient balance, and workability | operativity at the time of construction can be improved.

  The second bent portion is the second hinge 33.

  According to this configuration, since the second bent portion is the second hinge 33, the power supply unit 30 can be bent with a simple structure.

[Modification 1]
Next, Modification 1 according to the present embodiment will be described with reference to FIG. FIG. 7 is a cross-sectional view illustrating a schematic configuration of a heat sink 70A according to the first modification. In the following description, the same portions as those of the lighting device 1 according to the embodiment are denoted by the same reference numerals, the description thereof is omitted, and only different portions are described.

  In the said embodiment, the case where the 1st bending part was the 1st hinge 73 was illustrated. In the first modification, the case where the first bent portion is the elastic body 74 will be described. As shown in FIG. 7, in the heat sink 70 </ b> A according to the first modification, the first heat radiating portion 71 and the second heat radiating portion 72 are connected by an elastic body 74. The elastic body 74 is a metal spring, for example. One end of the elastic body 74 is joined to the first heat radiating portion 71, and the other end is joined to the second heat radiating portion 72. Since the elastic body 74 is elastically deformed, the elastic body 74 is bent, and the positional relationship between the first heat radiating portion 71 and the second heat radiating portion 72 is variable. Further, heat from the first heat radiating portion 71 is also conducted to the second heat radiating portion 72 via the elastic body 74. Since the optical fiber 40 passes through the hollow portion of the elastic body 74, the path of the optical fiber 40 is not blocked even if the elastic body 74 is elastically deformed.

  Thus, since the first bent portion is the elastic body 74, the surface area of the first bent portion can be increased as compared with the case of the hinge. Therefore, the heat dissipation in the first bent portion can be enhanced.

  In the first modification, the case where the elastic body 74 is a spring is illustrated, but a structure formed of a material having elasticity (for example, an elastic resin such as rubber) may be used. In this case, the structure has thermal conductivity. The material itself forming the structure may have thermal conductivity, or the surface of the structure may be coated with the heat conductive material as long as the elastic deformation of the structure is not hindered. Thereby, heat can be conducted from the first heat radiating portion 71 to the second heat radiating portion 72 via the elastic body 74.

  In the first modification, the case where the first bent portion of the heat sink 70A is the elastic body 74 is illustrated, but the second bent portion of the power supply unit 30 can also be an elastic body. An example of a specific configuration of the second bent portion made of an elastic body is equivalent to the elastic body 74 shown in FIG.

[Modification 2]
Next, Modification 2 according to the present embodiment will be described with reference to FIG. FIG. 8 is a cross-sectional view illustrating a schematic configuration of a heat sink 70B according to the second modification.

  In the said embodiment, the case where the 1st bending part was the 1st hinge 73 was illustrated. In the second modification, a case where the first bent portion is the bellows-like tube 75 will be described. As shown in FIG. 8, in the heat sink 70 </ b> B according to the second modification, the first heat radiating portion 71 and the second heat radiating portion 72 are connected by a bellows-like tube 75. The bellows-like tube 75 is made of, for example, metal, and one end thereof is joined to the first heat radiating portion 71 and the other end is joined to the second heat radiating portion 72. By bending the bellows-like tube 75, the positional relationship between the first heat radiating portion 71 and the second heat radiating portion 72 is variable. Further, heat from the first heat radiating portion 71 is also conducted to the second heat radiating portion 72 through the bellows-like tube 75. Since the optical fiber 40 passes through the hollow portion of the bellows-like tube 75, the path of the optical fiber 40 is not blocked even if the bellows-like tube 75 is deformed.

  Thus, since the first bent portion is the bellows-like tube 75, the surface area of the first bent portion can be increased as compared with the case of the hinge. Therefore, the heat dissipation in the first bent portion can be enhanced.

  In the second modification, the case where the first bent portion of the heat sink 70B is the bellows-like tube 75 is illustrated, but the second bent portion of the power supply unit 30 can also be a bellows-like tube. An example of a specific configuration of the second bent portion made of the bellows-like tube is equivalent to the bellows-like tube 75 shown in FIG.

[Modification 3]
Next, Modification 3 according to the present embodiment will be described with reference to FIGS. 9 and 10. FIG. 9 is a cross-sectional view showing a schematic configuration of a heat sink 70C according to the third modification. FIG. 10 is a cross-sectional view showing a bent state of the heat sink 70C according to the third modification.

  In the said embodiment, the case where the 1st bending part was the 1st hinge 73 was illustrated. In the third modification, the case where the first bent portion is the wire 76 will be described. As shown in FIG. 9, in the heat sink 70 </ b> C according to the third modification, the first heat radiating portion 71 and the second heat radiating portion 72 c are connected by a deformable metal wire 76. Here, a through-hole 725 extending in the longitudinal direction along the slit 721 is formed in the second heat radiating portion 72 c according to the third modification. One end of the wire rod 76 is inserted into the through hole 725 while being joined to the first heat radiating portion 71. A fastener 78 that prevents the wire 76 from coming out of the through hole 725 is attached to the other end of the wire 76. By adjusting the position of the fastener 78 with respect to the wire rod 76, the first heat radiating portion 71 and the second heat radiating portion 72c can be maintained in a straight line (see FIG. 9), or the first heat radiating portion 71 and the first heat radiating portion 71 The positional relationship with the two heat radiating portions 72c can be changed. Specifically, as shown in FIG. 10, the positional relationship between the first heat radiating portion 71 and the second heat radiating portion 72 becomes variable by bending the wire 76. Further, the heat from the first heat radiating portion 71 is also conducted to the second heat radiating portion 72 through the wire 76.

(Other)
As mentioned above, although the illuminating device which concerns on this invention was demonstrated based on the said embodiment and modification, this invention is not limited to said embodiment and modification.

  For example, in the above-described embodiment, the case where the first bent portion is provided with respect to the central portion of the heat sink 70 is illustrated, but the first bent portion may be provided in a portion other than the central portion of the heat sink 70. . Moreover, although the case where one first bent portion is provided for the heat sink 70 is illustrated, a plurality of first bent portions may be provided for one heat sink 70. The same applies to the power supply unit 30 and the second bent portion.

  In addition, it is realized by arbitrarily combining the components and functions in each embodiment without departing from the gist of the present invention, and forms obtained by making various modifications conceivable by those skilled in the art to the embodiments and modifications. Forms to be made are also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Illuminating device 10 Laser unit 20 Lamp unit 30 Power supply unit 33 2nd hinge (2nd bending part)
40 Optical fiber 50 Power cable 60 Light source 70, 70A, 70B, 70C Heat sink 73 First hinge (first bent portion)
74 Elastic body (first bent part)
75 bellows-like tube (first bend)
76 Wire (first bent part)

Claims (11)

A light source that emits laser light;
A long heat sink that houses the light source and dissipates heat from the light source;
An optical fiber for guiding the laser light emitted from the light source;
A lamp unit that emits light of a predetermined color by converting the laser light guided by the optical fiber into different wavelengths, and
The said heat sink has a 1st bending part which can be bent with respect to the longitudinal direction of the said heat sink. The lighting device according to claim 1, wherein the first bent portion is disposed at a central portion in a longitudinal direction of the heat sink. The lighting device according to claim 1, wherein the first bent portion is a hinge. The lighting device according to claim 1, wherein the first bent portion is a bellows-like tube. The lighting device according to claim 1, wherein the first bent portion is an elastic body. A long power supply unit for supplying power to the light source;
A power cable for electrically connecting the power supply unit and the light source,
The lighting device according to claim 1, wherein the power supply unit includes a second bent portion that is freely bent with respect to a longitudinal direction of the power supply unit. The lighting device according to claim 6, wherein the second bent portion is disposed at a central portion in the longitudinal direction of the power supply unit. The lighting device according to claim 6 or 7, wherein the second bent portion is a hinge. The lighting device according to claim 6 or 7, wherein the second bent portion is a bellows-like tube. The lighting device according to claim 6, wherein the second bent portion is an elastic body. A long heat sink that houses a light source that emits laser light and radiates heat from the light source,
A heat sink having a bent portion that is freely bent with respect to the longitudinal direction of the heat sink.

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