JP2013106878A - Light irradiation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light irradiation device that suppresses a drop in light quantity caused by moisture adhered to surfaces of bodies and hair.SOLUTION: The light irradiation device includes: an irradiation part 6 for radiating near infrared light; and a body 1 in which the irradiation part 6 is provided at one end. The irradiation part 6 has: a light source 7 that emits the near infrared light; and an irradiation port 11 that lets out the near infrared light of the light source 7 to the outside. The light source 7 has light-emitting diodes 10 for emitting light toward the irradiation port 11. The irradiation part 6 further includes: a heat transfer part 12 that transmits heat generated in the light source 7 during the light emission and releases the heat to the irradiation port 11 side.

Description

  The present invention relates to a light irradiation apparatus that irradiates near-infrared light on a living body surface to promote hair growth.

  Conventionally, as a light irradiation device for irradiating light on the surface of a living body, for example, a light irradiation type beauty device as shown in Patent Document 1 using a xenon lamp as a light source or a light emitting diode as shown in Patent Document 2 as a light source. There is a hair growth regulating light irradiation device used. The light irradiation type beauty apparatus as shown in Patent Document 1 suppresses the growth of hair such as hair by light emitted from a xenon lamp. In this light-irradiating beauty device, the amount of heat generated during light emission is large, and the heat generated during light emission may cause burns on the surface of the living body or thermal deformation of the lens provided at the irradiation port. The structure makes it difficult to transmit heat to the mouth.

  Moreover, in the hair growth adjusting light irradiation apparatus of patent document 2, it produces inflammation by irradiating the hair root part vicinity with the low energy light of the wavelength range of 600 nm or more and 1000 nm or less except the wavelength range of 870 nm or more and 910 nm or less. No hair growth is promoted.

JP 2010-142612 A JP 2008-246144 A

  And, in the hair growth regulating light irradiation device using a light emitting diode as a light source such as Patent Document 2, since the amount of heat generated at the time of light emission is smaller than that of a xenon lamp, compared to a light irradiation type beauty device using a xenon lamp, It is difficult to cause burns due to this heat and thermal deformation of the irradiated part. However, even the light irradiation device using the light emitting diode has a configuration in which heat is hardly transmitted to the irradiation port side (biological surface side) as in the light irradiation type beauty device using a xenon lamp.

  By the way, in the conventional hair growth adjusting light irradiation device, the so-called hair-growth light is irradiated with near-infrared light including a wavelength band that is easily absorbed by water on the living body surface. The amount of light may decrease due to absorption by water droplets attached to the hair on the surface.

  Therefore, in view of this situation, an object of the present invention is to provide a light irradiation device that suppresses a decrease in the amount of light due to moisture attached to the surface of a living body or hair.

  In order to solve the above-described problems, the present invention includes an irradiation unit that irradiates near infrared light, and a main body provided with the irradiation unit at one end, and the irradiation unit emits the near infrared light. And an irradiation port that emits the near infrared light of the light source to the outside, wherein the light source includes a light emitting diode that emits light toward the irradiation port, and the irradiation unit includes: The method further comprises a heat transfer unit that transfers heat generated in the light source during light emission and releases the heat to the irradiation port side.

  As this light irradiation device, the heat transfer portion covers the irradiation port, and has a light transmitting portion that transmits light from the light source at a position facing at least the light emitting diode in a portion covering the irradiation port. Is preferred.

  As this light irradiation device, the light source is composed of an LED board module in which a plurality of the light emitting diodes are arranged on the same plane, and a portion covering the irradiation port of the heat transfer unit is provided for each light emitting diode. It is preferable to have a lattice shape having

  As this light irradiation device, it is preferable that a transparent heat conductive member is provided in the light transmitting portion.

  As this light irradiation apparatus, it is preferable that the heat transfer portion includes a heat radiation fin that releases the heat to the irradiation port side, and the heat radiation fin is provided on the inner peripheral side of the irradiation port.

  As this light irradiation apparatus, it is preferable that the light source includes the light emitting diode that emits near infrared light having a wavelength band of 950 nm or 1450 nm.

  By adopting such a configuration, it is possible to suppress a decrease in the amount of light due to moisture adhering to the surface of the living body or hair using heat at the time of light emission, and to facilitate hair growth.

It is sectional drawing which showed typically the light irradiation apparatus of an example of embodiment. It is a top view same as the above. It is (a) top view of a LED board module, (b) is a side view. It is a perspective view of a heat-transfer part. It is a perspective view of the heat-transfer part of a 1st modification. It is (a) sectional drawing of a 2nd modification, (b) is a top view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the light irradiating apparatus of the present embodiment is mainly composed of a bottomed cylindrical main body 1 and an irradiation unit 6 that emits light for hair growth and irradiates the living body with this light. The light irradiation device is used in a state in which the side surface 1a of the main body 1 is gripped and the irradiation unit 6 provided at one end (first end portion 1b) on the opened side of the main body 1 is in contact with the surface of the living body. .

  The main body 1 has a rectangular cylindrical shape. As shown in FIG. 2, the first end 1b of the cylinder and the second end 1c (bottom) on the opposite side are rectangular in plan view, and the first end 1b. Has a rectangular opening. As shown in FIG. 1, the main body 1 includes a power supply unit 2 for supplying power for light emission to the irradiation unit 6, a control unit 3 for controlling the operation of the irradiation unit 6 for light emission, and the like. The conductive path 4 is connected to each other. The power supply unit 2 is, for example, a rechargeable built-in power supply such as a secondary battery, and supplies power to the control unit 3 and the irradiation unit 6 through the conductive path 4.

  The conductive path 4 is further provided with a switch 5 for switching between energization and interruption (power supply on / off). The main body 1 is exposed to the outer shell and is provided with an operation unit (not shown). Then, by operating this operation unit, power supply on / off of the conductive path 4 is switched via the switch 5. Further, the conductive path 4 is mainly formed of a conductive member such as a lead wire or a terminal fitting, for example, as a power supply line for power supply, a signal line for transmitting a control signal from the control unit 3, or the like. Function. The conductive path 4 includes a first conductive part 4a that electrically connects the power supply part 2 and the control part 3, and a second conductive part 4b that electrically connects the control part 3 and the irradiation part 6. Have.

  The control unit 3 is disposed between the power supply unit 2 and the irradiation unit 6 in the conductive path 4, and power from the power supply unit 2 is supplied to the control unit 3 and is also transmitted via the control unit 3. To be supplied. And the control part 3 performs light emission control so that the light source 7 may carry out pulse lighting.

  The irradiation unit 6 receives heat from the light source 7 electrically connected to the control unit 3 via the conductive path 4, the irradiation port 11 that contacts the edge 11a with the living body surface, and irradiates this heat. It has a heat transfer section 12 that discharges on the mouth 11 side, and the opening of the first end 1b is the irradiation port 11.

  The light source 7 is mainly composed of an LED substrate module 8 in which a plurality of light emitting diodes 10 are mounted on a substrate 9. As shown in FIG. 3, the LED substrate module 8 includes a rectangular plate-like substrate 9 and a plurality (16 in the present embodiment) of light emitting diodes 10, and the light emitting diode 10 is one plate surface of the substrate 9. (First plate surface 9a).

  The light-emitting diode 10 is a light-emitting body having directivity that emits light in a predetermined direction, and emits invisible (invisible) light (near-infrared light) in the near-infrared wavelength band. . As the wavelength band of this light, near-infrared light having a wavelength band of 950 nm or 1450 nm is preferable, and the irradiation unit 6 preferably emits near-infrared light having only one or both of these wavelength bands. The light emitting diodes 10 are arranged on the first plate surface 9a so that the direction of the emitted light is substantially parallel and substantially perpendicular to the first plate surface 9a.

  Therefore, the light source 7 is configured to emit near infrared light emitted from the light emitting diode 10 in a direction substantially orthogonal to the first plate surface 9a and away from the first plate surface 9a. By irradiating near-infrared light on the surface of a living body such as the scalp, it is possible to facilitate the growth of hair near the irradiated living body surface (the hair growth effect can be easily enhanced). Hereinafter, the direction in which the near-infrared light (irradiation light) is emitted is referred to as an irradiation direction L as shown in FIG.

  In addition, the light emitting diodes 10 are arranged on the substrate 9 at substantially equal intervals and in predetermined positions in plan view. Specifically, as shown in FIG. 3, a row in which four light emitting diodes 10 are arranged along one direction (first side of the substrate 9) on the substrate 9 is orthogonal to the one direction on the substrate 9. Four (four rows) are arranged along the other direction (second side of the substrate 9).

  As shown in FIG. 1, the light source 7 (LED board module 8) is provided inside the main body 1, and the irradiation port 11 is located at the tip of the light source 7 in the irradiation direction L. Therefore, the light emitted from the light source 7 is emitted as irradiation light from the first end 1 b to the outside of the main body 1 through the irradiation port 11.

  As shown in FIG. 2, the irradiation port 11 is opened in a rectangular shape, and the light source 7 is located inside (inner peripheral side) of the irradiation port 11 in a plan view. The edge 11 a of the irradiation port 11 is formed by the outer shell of the main body 1, and when the light irradiation is performed by the irradiation unit 6, the entire edge 11 a is in contact with the surface of the living body. Therefore, near-infrared light (invisible irradiation light) emitted from the irradiation port 11 is surrounded by a portion (inside the edge portion 11a) located in the irradiation port 11 on the surface of the living body contacting the edge portion 11a. Irradiate the region).

  As shown in FIG. 4, the heat transfer section 12 is formed by bending a highly heat conductive plate material having a higher thermal conductivity than the air and the substrate 9 into a C shape. It is made of metal that easily transfers heat. And the heat-transfer part 12 transfers the heat which generate | occur | produced in the light source 7 by light emission etc. to the irradiation port 11 side, cools the light source 7, and provides this heat | fever to the biological body surface.

  The heat transfer section 12 includes a heat absorbing section 13 that absorbs heat from the light source 7, a heat radiating section 15 that releases heat received by the heat absorbing section 13 on the irradiation port 11 side, and heat from the heat absorbing section 13 to the heat radiating section 15. And a connecting portion 14 for communication.

  As shown in FIG. 1, the heat absorbing portion 13 is mainly composed of C-shaped ends. And the heat absorption part 13 is a flat plate shape substantially parallel to the substrate 9, the plate surface is in contact with the second plate surface of the substrate 9 (opposite side of the first plate surface 9a), and is attached to the LED substrate module 8. The light of the light emitting diode 10 is absorbed through the substrate 9.

  The connecting portion 14 has a flat plate shape substantially parallel to the irradiation direction L. And the connection part 14 is thermally connected to the heat absorption part 13 in the edge in the irradiation direction L of a flat plate, and the edge on the irradiation port 11 side is thermally connected to the heat dissipation part 15. Connected. Therefore, the connection part 14 thermally connects the heat absorption part 13 and the heat dissipation part 15.

  The heat dissipating portion 15 is a flat plate having a plate surface substantially orthogonal to the irradiation direction L, covers the irradiation port 11, and in plan view, as shown in FIG. An opening 21 is provided at the overlapping position.

  The opening portion 21 is provided with a lattice portion 22, and the light emitting diode 10 is positioned directly opposite to the irradiation direction L in a plan view between the lattices (gap). Therefore, this gap serves as a translucent portion 23 for transmitting light from the light source 7. In other words, as shown in FIG. 4, the heat radiating part 15 includes a frame part 20 along the edge part 11 a of the irradiation port 11, and an opening part partitioned in a lattice pattern on the inner peripheral side of the frame part 20. 21 is provided, and the space between the lattices is a light-transmitting portion 23.

  Moreover, when the edge part 11a of the irradiation port 11 is contact | abutted to the biological body surface, the thermal radiation part 15 is contact | abutted to the site | part enclosed by the edge part 11a of the biological body surface. And the heat radiating part 15 provides the heat | fever of the light source 7 transmitted via the heat absorption part 13 and the connection part 14 to the biological surface which contact | abutted. Therefore, the living body surface to which heat is applied can easily evaporate water droplets attached to the living body surface, or the circulation of the living body can be easily promoted by the thermal effect.

  Thus, by providing the heat transfer section 12, the heat of the light source 7 having a smaller amount of heat than that of the xenon lamp can be applied to the living body surface, and a part of the irradiation light in the near-infrared wavelength band can be obtained. It is possible to easily suppress the light amount from being absorbed by the water droplets. And by suppressing the fall of light quantity, the hair-growth effect by light irradiation can be made easy to increase, the increase in the irradiation time by light quantity fall can be suppressed, and it can make it easy to perform light irradiation to a user. it can. Further, since blood circulation is easily promoted by the thermal effect, for example, it becomes easy to supply nutrients to cells, so that hair can be easily grown and the hair growth effect can be easily enhanced.

  Furthermore, since the heat absorption part 13 absorbs the heat of the LED board module 8 and cools the light source 7, it is possible to easily reduce the heat resistance limit required for the constituent members of the light source 7, and the cost due to the limitation of the heat resistance performance. The increase can be easily suppressed.

  Hereinafter, modifications of the heat transfer section 12 illustrated in FIGS. 5 and 6 will be described. Note that the description of the same configuration as that described above is omitted.

  In the first modification shown in FIG. 5, the heat transfer section 12 (heat radiating section 15) does not include the lattice section 22. In this example, the entire rectangular region in which the light emitting diodes 10 are arranged serves as one light transmitting portion 23, is transparent to the opening portion 21, and has a higher thermal conductivity than air or the substrate 9. Is provided.

  Specifically, the heat radiating portion 15 is mainly composed of a rectangular frame portion 20, and the frame portion 20 has one opening 21 on the inner peripheral side. The opening 21 is positioned so as to overlap with a rectangular region in which the light emitting diodes 10 are arranged in plan view. The entire opening 21 is covered with a heat transfer member 25 in plan view.

  The heat transfer member 25 is formed of a transparent and highly heat conductive member, and the irradiation unit 6 irradiates the surface of the living body with the light from the light source 7 via the heat transfer member 25. Note that the transparency in the heat transfer member 25 refers to an optical function capable of transmitting the irradiation light without substantially reducing the amount of light. In other words, the heat transfer member 25 changes the directivity of irradiation light (light from the light source 7), such as a condenser lens or a diffusion lens, or transmits it without changing the directivity of the irradiation light. It is an optical functional member such as a member.

  The heat transfer member 25 is thermally connected and attached to the frame portion 20, and the heat of the light source 7 absorbed by the heat absorption portion 13 is transmitted through the frame portion 20. The outer surface of the heat transfer member 25 facing the irradiation direction L is substantially flush with the plate surface contacting the living body surface of the frame portion 20, and this outer surface when the frame portion 20 contacts the living body surface. Contacts the surface of the living body.

  Therefore, the heat transfer member 25 can impart the transmitted heat to the surface of the living body, suppress a decrease in the amount of light due to water droplets, and impart a thermal effect, thereby making it easier to enhance the hair growth effect. And since the whole area | region which has arrange | positioned the light emitting diode 10 was made into the one opening part 21, the diffuser lens which spreads the light of the light source 7 over the whole opening part 21 is used for the heat-transfer member 25, for example, and the opening part 21 is used. Irradiation light can be irradiated to substantially the entire portion overlapping with.

  In the second modification shown in FIG. 6, the heat transfer unit 12 (heat dissipation unit 15) does not include the lattice unit 22 and the heat transfer member 25. In this example, the heat radiation fins 28 are provided in the openings 21, and heat is applied from the heat radiation fins 28 to the surface of the living body via air.

  Specifically, four connection portions 14 are provided so as to surround the four sides of the substrate 9, the connection portions 14 are arranged in a rectangular shape in plan view, and an end portion of the connection portion 14 facing the irradiation direction L is The frame portion 20 is provided in a rectangular shape along the plan view shape of the connecting portion 14. And the frame part 20 has a width dimension (a dimension toward the inner peripheral side in a plan view) of the plate surface that comes into contact with the surface of the living body substantially the same as the plate thickness of the connection part 14, and the opening 21 is the connection part. It has substantially the same shape as the inside of the 14 rectangle. Therefore, the frame part 20 has a space 27 between the light emitting diode 10 in plan view. In the space 27, heat radiating fins 28 are arranged.

  The radiating fin 28 is formed in a shape extending from the end surface facing the inner peripheral side (opening 21 side) of the frame portion 20 or the plate surface facing the inner peripheral side of the connection portion 14 toward the inner peripheral side in plan view. A plurality (four in this example) are provided on each of the four sides of the frame portion 20. The radiating fins 28 are formed to extend in a direction substantially orthogonal to the provided side, and the radiating fins 28 are arranged at substantially equal intervals in the direction along the side, and the extension is performed. The light emitting diode 10 is positioned on the extended line of the direction. In other words, the frame portion 20 and the heat radiating fins 28 are provided between the light emitting diodes 10 on the inner peripheral side of the edge portion 11a in plan view.

  Furthermore, the radiating fins 28 are positioned such that the tips in the irradiation direction L are recessed (on the rear side) in the irradiation direction L as compared to the plate surface contacting the living body surface of the frame portion 20. When contacting the surface, the heat radiating fins 28 are difficult to contact the surface of the living body.

  Thus, by providing the heat radiation fins 28 in the heat radiation part 15, the heat from the abutted frame part 20 and the heat released from the heat radiation fins 28 are imparted to the living body surface, and water droplets are generated. It is possible to make it easy to enhance the hair-growth effect by suppressing a decrease in the amount of light and applying a thermal effect.

  The space 27 is formed between the frame portion 20 and the light emitting diode 10 and the heat radiation fins 28 are provided in the space 27, so that the heat is prevented from being blocked by the heat radiation portion 15 such as a lattice and the heat is raised. A configuration that can be used to improve the effect can be easily obtained. Furthermore, since it is difficult for the radiating fin 28 to come into contact with the surface of the living body, it is possible to make it difficult for the radiating fin 28 to be deformed due to contact with the surface of the living body.

  It should be noted that the present invention is not limited to the configuration of the embodiment and each modified example, and within the scope intended by the present invention, appropriate design changes can be made in the embodiment, each modified example, etc. It is possible to apply a combination of configurations as appropriate. For example, the heat transfer part 12 is formed of resin, or the frame part 20 and the lattice part 22 are formed as separate members, and the transparent heat transfer member 25 is integrally provided between the lattice parts 22. Also good. For example, the structure which does not provide the grating | lattice part 22 and the heat-transfer member 25 in the opening part 21 may be sufficient. The main body 1 is not limited to a rectangular cylindrical shape, and may be a cylindrical shape or the like, and the opening of the first end 1b is not limited to a rectangular shape.

  The light emitting diode 10 may emit light in a wavelength band other than the wavelength band in the near infrared region or light including a wavelength band other than in the near infrared region. In this case, for example, the light source 7 includes an optical member that emits near-infrared light toward the irradiation port 11 when light emitted from the light emitting diode 10 enters between the LED board module 8 and the irradiation port 11. Prepare.

DESCRIPTION OF SYMBOLS 1 Main body 6 Irradiation part 7 Light source 8 LED board module 10 Light emitting diode 11 Irradiation port 12 Heat transfer part 20 Frame part 22 Grid part 23 Light transmission part 25 Heat transfer member 28 Radiation fin L Irradiation direction

Claims (6)

An irradiation unit that irradiates near-infrared light and a main body provided with the irradiation unit at one end, and the irradiation unit emits the near-infrared light, and the near-infrared light of the light source externally A light irradiating device having an irradiation port for emitting light to
The light source includes a light emitting diode that emits light toward the irradiation port;
The light irradiation apparatus, further comprising a heat transfer unit that transfers heat generated in the light source during light emission and releases the heat to the irradiation port side. The heat transfer unit covers the irradiation port, and has a light-transmitting unit that transmits light from the light source at a position facing the light-emitting diode at least in a portion covering the irradiation port. The light irradiation apparatus according to 1. The light source is composed of an LED substrate module in which a plurality of the light emitting diodes are arranged on the same plane,
The light irradiation apparatus according to claim 2, wherein a portion of the heat transfer unit that covers the irradiation port has a lattice shape having the light transmitting part for each of the light emitting diodes. The light irradiation apparatus according to claim 2, wherein a transparent heat conductive member is provided in the translucent part. The heat transfer part includes a heat radiation fin that releases the heat to the irradiation port side,
The light irradiation apparatus according to claim 1, wherein the radiation fin is provided on an inner peripheral side of the irradiation port. 6. The light irradiation apparatus according to claim 1, wherein the light source includes the light emitting diode that emits near-infrared light having a wavelength band of 950 nm or 1450 nm.

Images