JP2022081826A - Handpiece for optical depilation, and depilation processing device - Google Patents

Abstract

To provide a handpiece for optical depilation, obtaining light of a wavelength effective to depilation, and suppressing temperature rise of a contact part of the handpiece to the skin, and to provide a depilation processing device.SOLUTION: A handpiece for optical depilation includes: a light-emitting lamp; a reflection type filter reflecting light of a wavelength shorter than a predetermined wavelength of irradiation light of the light-emitting lamp; and an absorption type filter absorbing light of a wavelength shorter than the predetermined wavelength penetrating into the reflection type filter. A depilation processing device includes the handpiece for optical depilation.SELECTED DRAWING: Figure 1

Description

The present invention relates to a handpiece for photoepilation and a hair removal treatment device. In particular, the present invention relates to a photo-epilation handpiece and a hair-removal treatment device that perform hair removal treatment by irradiating a light beam emitted from a xenon tube among light-emitting lamps.

Conventionally, for beauty, photoepilation (flash hair removal) is performed in which light that emits heat in response to the melanin pigment of the hair root is irradiated to the skin surface in a pulsed manner to promote hair removal.

The principle of photo-hair removal is that the light energy absorbed by the hair root and the melanin around the hair root is converted into heat energy, which damages tissues such as hair roots, hair papillae, and hair matrix cells, resulting in hair regeneration. It is to suppress.

The handpiece of the optical epilator has a built-in light source, and pulsed light is emitted through a rectangular irradiation window. The practitioner grasps the handpiece, faces the irradiation window to the area to be depilated by the practitioner, and performs a predetermined operation such as pressing the irradiation button to emit pulsed light, thereby damaging the hair root (hair papilla). Promotes hair loss by giving and weakening.

For these reasons, a photophore with a sufficient amount of light is required for the handpiece of a cosmetic photoepilator, and therefore, a xenon tube has been the mainstream as a light source. However, if the area to be depilated is narrow, a handpiece using a xenon tube is too large to perform sufficient treatment on the target area, or if it is a soft and delicate area such as the face, xenon. Since there is a problem that the amount of light in the tube is too strong, the study of light emitting diodes is also underway recently.

On the other hand, since the xenon tube has a larger amount of light than the light emitting diode, it is still suitable for the treatment of a part having a wide hair loss area or a non-delicate part. However, the xenon tube consumes a large amount of power at a high voltage in order to obtain a predetermined amount of light, and the amount of heat generated is also large accordingly, so that the temperature of the irradiation window, which is a portion that comes into contact with the skin, becomes high. In addition, the irradiation light of the xenon tube has a wide frequency spectrum and contains a wavelength component that is not effective for hair removal.

As a wavelength component that is not effective for hair removal, for example, light having a wavelength of 530 nm or less for facial treatment and a wavelength of 600 nm or less for normal treatment is not effective for hair removal. Moreover, when irradiated with light containing these wavelengths, the subject may feel hot due to radiant heat. For this reason, it is necessary to block light having a wavelength that does not suppress the temperature rise of the handpiece or have a hair removal effect.

Japanese Unexamined Patent Publication No. 2019-213841

Therefore, the photo-hair removal device described in Patent Document 1 is provided with a water-cooled cooling unit for cooling the irradiation unit of the handpiece, and the cooling water is arranged in close proximity to the three directions of the irradiation lamp to further irradiate. By arranging the Peltier element between the lamp and the cooling water, it is configured to suppress the temperature rise due to heat generation.

However, although the effect of suppressing the temperature rise of the handpiece can be expected by such a configuration, the irradiation light of the irradiation lamp directly applied to the skin of the treated person contains a wavelength component that is not effective for hair removal. Therefore, the radiant heat makes the person to be treated feel hot.

The present invention has been made in view of such conventional problems, and first of all, it is not effective for hair removal including an ultraviolet region by using a reflective filter in order to obtain light having a predetermined wavelength effective for hair removal. A wavelength effective for hair removal by reflecting light shorter than a predetermined wavelength and then absorbing light shorter than a predetermined wavelength that has been irradiated at a large incident angle and transmitted through the reflective filter by the absorption type filter. It is an object of the present invention to provide a handpiece for photo-hair removal and a hair-removing treatment device configured to be able to obtain the light of the above.

The handpiece for photo-hair removal according to the present invention comprises a light emitting lamp, a reflective filter that reflects light having a wavelength shorter than a predetermined wavelength of the irradiation light of the light emitting lamp, and a predetermined wavelength transmitted through the reflective filter. It has an absorption type filter that absorbs light having a short wavelength.

Further, the light emitting lamp is characterized in that it is composed of a xenon tube.

Further, the reflective filter is characterized in that the surface facing the light emitting lamp is formed in a substantially concave shape.

The hair removal treatment apparatus according to the present invention includes a light emitting lamp, a reflective filter that reflects light having a wavelength shorter than a predetermined wavelength of the irradiation light of the light emitting lamp, and a wavelength shorter than a predetermined wavelength transmitted through the reflective filter. It is equipped with an absorption type filter that absorbs the light of the above, and a handpiece for photo-hair removal having.

According to the invention of claim 1, the photo-hair removal handpiece transmits a light emitting lamp, a reflective filter that reflects light having a wavelength shorter than a predetermined wavelength of the irradiation light of the light emitting lamp, and the reflective filter. Since it has an absorption type filter that absorbs light having a wavelength shorter than a predetermined wavelength, it is possible to obtain light having a wavelength effective for hair removal.

Specifically, the reflective filter reflects light having a wavelength shorter than a predetermined wavelength that is not effective for hair removal or facial, and transmits light having a wavelength that is effective for hair removal. Further, the absorption type filter absorbs light having a wavelength shorter than a predetermined wavelength that has been transmitted without being reflected by the reflection type filter. Therefore, it is possible to transmit light having a wavelength longer than a predetermined wavelength effective for hair removal and irradiate the skin of the person to be treated through the light guide. As a result, the person to be treated can be treated for hair removal.

Further, since the light of a predetermined wavelength of the light emitting lamp is reflected by the reflection type filter, the temperature rise of the absorption type filter can be suppressed. Further, since the absorption type filter absorbs light having a wavelength shorter than 530 nm, which has no effect on hair removal, radiant heat can be reduced. Therefore, it is possible to solve the problem that the person to be treated feels hot due to radiant heat.

Further, when light of a predetermined wavelength or less is absorbed by using only an absorption type filter that absorbs light having a wavelength shorter than a predetermined wavelength, the light energy of the wavelength absorbed by the absorption type filter becomes heat. For this reason, the heat generation of the absorption type filter becomes large, and the temperature rise becomes large. As a result, the absorption type filter deteriorates and the transmittance decreases, so that it is necessary to replace the absorption type filter regularly. Therefore, in order to suppress the temperature rise of the absorption type filter, it is necessary to increase the cooling capacity of a separate water cooling device, Peltier element, or the like, which complicates the cooling device.

However, by using the reflection type filter and the absorption type filter together, the reflection type filter reflects light having a wavelength shorter than a predetermined wavelength, so that the absorption of the light energy of the absorption type filter is reduced and the heat generation is suppressed. Can be done. Therefore, it is possible to suppress the temperature rise of the absorption type filter. Further, by suppressing the temperature rise of the absorption type filter, it is possible to prevent the absorption type filter from deteriorating and to significantly extend the replacement period of the absorption type filter. Further, it is possible to avoid complicating the cooling device of the handpiece.

According to the second aspect of the present invention, the light emitting lamp is characterized by being composed of a xenon tube. Therefore, it is possible to provide a handpiece that is equipped with a xenon tube that is convenient for treatment of a portion having a wide hair removal target area and that reduces radiant heat that irradiates light having a wavelength effective for hair removal.

According to the third aspect of the present invention, the reflective filter is characterized in that the surface facing the light emitting lamp is formed in a substantially concave shape. Therefore, the incident angle of the light emitted from the light emitting lamp to the reflective filter with a large irradiation angle can be reduced. As a result, the amount of light that reflects light having a wavelength shorter than a predetermined wavelength can be increased, and the amount of light that passes through the reflective filter and reaches the absorption type filter can be reduced.

Further, this can suppress the heat generation of the absorption type filter. Therefore, it is possible to suppress the temperature rise of the absorption type filter. Further, by suppressing the temperature rise of the absorption type filter, it is possible to prevent the absorption type filter from deteriorating and to significantly extend the replacement period of the absorption type filter. Further, it is possible to avoid complicating the cooling device of the handpiece.

According to the invention of claim 4, the hair removal treatment apparatus includes a light emitting lamp, a reflective filter that reflects light having a wavelength shorter than a predetermined wavelength of the irradiation light of the light emitting lamp, and a predetermined one that has passed through the reflective filter. It is provided with an absorption type filter that absorbs light having a wavelength shorter than the wavelength of the above, and a handpiece for photo-hair removal.

For this purpose, by providing a handpiece with a large amount of light that cuts light having a wavelength shorter than a predetermined wavelength and irradiates light having a wavelength effective for hair removal, an appropriate treatment can be performed and the person to be treated is performing the treatment. It is possible to provide a hair removal treatment apparatus that does not feel hot by touching the irradiation window or feel hot due to radiant heat.

It is a schematic block diagram of the hair removal treatment apparatus which concerns on this invention. It is a top view and a side view of the handpiece equipped with the xenon tube of the hair removal treatment apparatus which concerns on this invention. It is a figure which shows the example of the frequency spectrum of the xenon tube used for a handpiece, and the frequency spectrum after passing through an absorption type filter. It is explanatory drawing which the wavelength of the light which passes through a reflection type filter changes by the incident angle of light. It is a perspective view which shows the positional relationship between a xenon tube and a filter. It is explanatory drawing of the arrangement of the filter of the handpiece for photo-epilation which concerns on 1st Embodiment of this invention, and the reflected light and transmitted light. It is explanatory drawing of the incident angle and the reflection angle of the light of the filter of the handpiece for photo-epilation which concerns on 1st Embodiment of this invention. It is explanatory drawing of the arrangement of the filter of the handpiece for photo-epilation which concerns on 2nd Embodiment of this invention, and the reflected light and transmitted light. It is explanatory drawing of the incident angle and the reflection angle of the light of the filter of the handpiece for photo-epilation which concerns on the 2nd Embodiment of this invention. It is a schematic structural side view which shows the cooling mechanism of a handpiece.

<Basic configuration of hair removal treatment device>
Hereinafter, the basic configuration of the hair removal processing apparatus 300 provided with the handpiece for photo-epilation according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a hair removal treatment device 300 according to the present invention. The hair removal processing device 300 shown in this figure is composed of a handpiece 5A equipped with a xenon tube connected to the device main body 1 via a device main body 1 and a connection cable 80, or a handpiece (not shown) equipped with a light emitting diode. This is an example.

The device main body 1 includes an operation unit 3 equipped with operation switches and indicators, a control unit (not shown) for performing various control processes composed of circuits such as a microcomputer, and a xenon tube 100A mounted on a handpiece. It has a power supply unit (not shown) that supplies power to the light emitting diode and a cooling unit (not shown) that recovers the heat associated with the light emission of the xenon tube 100A and the light emitting diode with cooling water and cools it. ing.

As shown in FIG. 1, the apparatus main body 1 of the hair removal processing apparatus 300 provided with the photo-epilation handpiece according to the present invention has a substantially rectangular shape and a tabletop shape in which the operation portion 3 is formed on a slope. As shown in FIG. 1, the operation unit 3 is provided with an operation panel 30 and a key switch 32. The operation panel 30 includes an emergency stop button 31, a display panel 33, a MODE button 34, an OK button 35, and a SELECT button 36.

The display panel 33 is a display device that displays various setting states, alarms, and the like, and is composed of a liquid crystal display and the like. The MODE button 34 is a button for selecting one of the processing modes A to D and F, and the A to D and F modes divide the light irradiation point into modes such as face and body. .. The OK button 35 is a button for confirming the setting contents after setting each mode. The SELECT button 36 is a button for increasing or decreasing the intensity of the irradiation light, and the intensity of the light is increased or decreased each time the button is pressed.

The emergency stop button 31 is a button for forcibly stopping the irradiation of light or the like in the event of an emergency. The key switch 32 is a switch for inserting a key (not shown) and turning it clockwise to enable operation, and turning it counterclockwise to stop the function. Needless to say, if the key switch 32 is removed, the hair removal treatment function will be stopped.

The connector portion 8 is arranged below the front surface of the apparatus main body 1 and is a connection connector for connecting the connection cable 80. The connector portion 8 is provided with an electric system connector 81 and a cooling system connector 82, respectively. In this configuration example, one connection cable 80 can be connected, but the number is not limited to one. For example, two hands in total are provided on the left and right sides of the lower front surface of the apparatus main body 1. The pieces may be used alternately so that the treatment can be performed.

The connection cable 80 is a cable for connecting the device main body 1 to the handpiece 5A equipped with the xenon tube 100A shown in FIG. 2 or the handpiece (not shown) equipped with a light emitting diode. Either the handpiece 5A or the handpiece equipped with the light emitting diode is connected to the tip of the connection cable 80.

As the light emitting lamp of the handpiece, a xenon tube 100A and a light emitting diode can be considered as described above. Hereinafter, an example in which a handpiece 5A equipped with a xenon tube 100A having a large amount of light is connected will be described.

The connection cable 80 connects the device main body 1 and the handpiece 5A, and cools the signal line for exchanging various signals between the device main body 1 and the handpiece 5A, the power line for supplying electric power to the xenon tube 100A, and the handpiece 5A. It houses a cooling water pipe that circulates cooling water for the purpose. One end of the connection cable 80 is connected to the connector portion 8 and the other end is connected to the handpiece main body 50 via the grip portion 59.

<Handpiece equipped with xenon tube>
As shown in the plan view of FIG. 2A and the side view of FIG. 2B, the handpiece 5A equipped with the xenon tube 100A is a handpiece main body having a substantially convex semicircular arc shape in the side view and a substantially flat shape in the front view. A display 53 and a first irradiation button 51 are provided on the upper surface of the 50. That is, a display 53 consisting of a small circular irradiation preparation lamp is arranged at the tip of the semicircular upper surface, and the handpiece main body 50 is held at a position on the ventral surface of the tip of the index finger behind the display 53. A first irradiation button 51 is arranged, and an irradiation counter 54 composed of a liquid crystal display window is further arranged behind the first irradiation button 51.

As shown in the side view of FIG. 2B, the handpiece 5A has a slightly concave central portion on both side surfaces of the handpiece main body 50 and a semicircle along the semicircular upper surface on the upper side surface. It is formed in an arcuate convex shape. By forming the handpiece 5A in such a shape, the grip portion 59 or the handpiece main body 50 is gripped, and the irradiation portion 55 is operated so as to face the portion to be depilated.

Further, a second irradiation button 52 is arranged below the base portion of the grip portion 59 of the handpiece main body 50. The xenon tube 100A is configured to emit a pulse when either the first irradiation button 51 or the second irradiation button 52 is operated. When the xenon tube 100A is not irradiated, a weak current is applied to cause shimmer light emission so that the xenon tube 100A emits light with good response during irradiation.

The practitioner confirms that the display 53 of the handpiece 5A is in the stopped state (lit in red), grips the handpiece main body 50 or the grip portion 59 according to the treatment site of the hair removal treatment, and opens the irradiation window 57. Press it against the skin surface of the treatment site and bring it into close contact horizontally. Then, once the first or second irradiation buttons 51 and 52 are pressed, the standby state (lights up in blue) is set and irradiation is possible. By pressing the same first or second irradiation buttons 51 and 52 again within the waiting time (for example, 10 seconds), the pulsed light is emitted from the irradiation window 57. As described above, the practitioner performs the hair removal treatment.
The handpiece 5A does not need to include all the components such as the first irradiation button 51, the second irradiation button 52, and the irradiation counter 54 described above, and may be selected according to the intended use and purpose. good.

<First Embodiment>
Next, the first embodiment of the present invention will be described. FIG. 3 is a diagram showing an example of the frequency spectra of the irradiation light 100 of the xenon tube 100A used for the handpiece 5A and the transmitted light 101 of the reflection type filter 12 described later. According to the frequency spectrum of the irradiation light 100 of the xenon tube 100A, the wavelength of the light is 300 nm to 1200 nm, which extends from the ultraviolet region to the infrared region. However, in FIG. 3, 750 nm or more is omitted.
In addition, the energy of light is higher for light with a shorter wavelength than the relational expression of E = hν = h / λ (E: light energy, h: Planck constant, ν: frequency, λ: wavelength). big.

On the other hand, the wavelength of light that is generally effective for hair removal is 600 nm to 800 nm. Further, it is said that a wavelength from 530 nm is effective for facial (skin surface pigment removal).

However, as shown in the frequency spectrum of the irradiation light 100 in FIG. 3, the xenon tube 100A contains a large amount of wavelength components shorter than the wavelength of 530 nm. In particular, it has a steep pointed waveform in the region of 440 nm to 500 nm. Therefore, in order to obtain light having a wavelength longer than 530 nm, an absorption type filter 11 is used to remove components having a wavelength shorter than 530 nm.

Then, as can be seen from this figure, the absorption type filter 11 absorbs a very large amount of light energy having a wavelength of 600 nm or less. The light energy absorbed by the absorption type filter 11 becomes heat. This heat causes the temperature rise and deterioration of the absorption type filter 11 described above. Then, since the absorption type filter 11 deteriorates and the transmittance decreases, there arises a problem that the absorption type filter 11 needs to be replaced periodically. Therefore, it cannot be said that the measure of using the absorption type filter 11 to absorb a wavelength component shorter than the wavelength of 530 nm, which is not effective for hair removal, is sufficient.

Therefore, in the present invention, the reflection type filter 12 is used in combination with the absorption type filter 11. Specifically, of the light emitted by the xenon tube 100A, the light having a wavelength shorter than the cut wavelength is reflected by the reflective filter 12 and has a wavelength shorter than the cut wavelength transmitted by the reflective filter 12 without being completely reflected. The absorption type filter 11 is configured to absorb light. As a result, the light energy absorbed by the absorption type filter 11 is reduced, the temperature rise of the absorption type filter 11 is suppressed, thereby preventing the deterioration of the absorption type filter 11 and extending the replacement period of the absorption type filter 11. be able to.

The frequency spectrum of the transmitted light 101 when the irradiation light 100 of the xenon tube 100A is vertically irradiated to the reflective filter 12 having a cut wavelength of 600 nm is as shown in FIG. As shown in this figure, the reflective filter 12 hardly reflects light having a wavelength of 530 nm or less and does not transmit it. On the contrary, light having a wavelength longer than 600 nm is almost transmitted without being reflected. Therefore, the irradiation light 100 and the transmitted light 101 almost overlap each other at around 610 nm. From this, it can be seen that light having a wavelength of 610 nm or more is transmitted as it is without being reflected.

The cut wavelength is a wavelength at which light having a wavelength shorter than a predetermined wavelength is reflected and light having a wavelength longer than the predetermined wavelength is transmitted. By specifying the cut wavelength of the reflection type filter 12 at the time of manufacture, it is possible to obtain a reflection type filter 12 that reflects light having a wavelength shorter than the specified wavelength. Therefore, once manufactured, the cut frequency of the reflective filter 12 cannot be changed. For this purpose, we will manufacture after determining the specifications of the cut wavelength.

FIG. 4 shows the frequency spectra of the transmitted light 101 to 103 when the reflective filter 12 is irradiated with the irradiation light 100 of the xenon tube 100A. The transmitted light 101 in this figure is the same as the transmitted light 101 in FIG. 3 when the reflective filter 12 is vertically irradiated with the irradiation light of the xenon tube 100A, and FIG. 4 is an enlarged view of FIG. From FIG. 4, it can be seen that the treated person is irradiated with light having a wavelength that is not effective for hair removal.

Further, the transmitted light 102 in FIG. 4 is a frequency spectrum when the reflective filter 12 is irradiated with the irradiation light 100 of the xenon tube 100A at an angle of 45 degrees. As can be seen from the transmitted light 102, when the irradiation light 100 is irradiated with an inclination of 45 degrees, it can be seen that light having a wavelength shorter than the cut wavelength passes through the reflective filter 12. In other words, it can be seen that the cut wavelength of the reflective filter 12 is substantially shifted to the ultraviolet region.

The transmitted light 103 in FIG. 4 is a frequency spectrum when the reflective filter 12 is irradiated with the irradiation light 100 of the xenon tube 100A at an angle of 60 degrees. As can be seen from the frequency spectrum of the transmitted light 103, it can be seen that the transmitted light 103 of the reflective filter 12 is further increased as compared with the case where the irradiation light 100 of the xenon tube 100A is tilted by 45 degrees. In other words, it can be seen that the wavelength that is the cut wavelength of the reflective filter 12 is further shifted to the ultraviolet region. That is, it can be seen that in the reflective filter 12, the transmitted light 101 to 103 increases as the irradiation angle of the irradiation light 100 increases.

The handpiece 5A using the reflective filter 12 having such characteristics will be described in detail below. FIG. 5 is a schematic layout of the xenon tube 100A, the reflection type filter 12, and the absorption type filter 11. As shown in this figure, in order from the top in the Z direction, the xenon tube 100A, the flat plate-shaped reflective filter 12, the flat plate-shaped absorption filter 11, and the rectangular light guide 15 are spaced apart from each other in this order. It is arranged. Here, the directions of X, Y, and Z are the left side surface of this figure, that is, the left-right direction is X, the front-back direction is Y, and the up-down direction is Z when viewed from the extension of the axis of the light source B of the xenon tube 100A. .. Here, the light source B of the xenon tube 100A is represented by the point B.

Further, in the present embodiment, an example in which the reflection type filter 12, the absorption type filter 11 and the light guide body 15 are arranged at predetermined intervals will be described, but the reflection type filter 12, the absorption type filter 12 and the absorption type are described in the above order. The filter 11 and the light guide body 15 may be arranged in close contact with each other.
Further, the light guide body 15 is made of sapphire. Sapphire has high transparency and does not absorb light, so it hardly generates heat. For this reason, it is most suitable for use on the part that comes into contact with the skin of the person to be treated.

Here, the relationship between the incident light and the reflected light will be described with reference to FIG. The incident angle of the irradiation light 100 irradiated at the angle θ1 formed by the perpendicular line from the xenon tube 100A to the reflective filter 12 is the angle θ1 formed by the perpendicular line formed from the light source B of the xenon tube 100A to the reflective filter 12. Further, the reflection angle is the same angle θ1 as the angle θ1 of the incident angle. That is, the light irradiated from the xenon tube 100A to the reflection type filter 12 at an incident angle of θ1 is reflected by the reflection angle of an angle of θ1.

FIG. 7 is a view of the left side surface in FIG. 5, that is, a view in the Y direction from an extension of the axis of the light source B of the xenon tube 100A. Here, light having a wavelength shorter than the cut wavelength is shown by a broken line. Hereinafter, in order not to complicate the explanation, the description will be focused on light having a wavelength shorter than the cut wavelength.

In FIG. 7, the irradiation light 100 perpendicularly irradiated to the reflective filter 12 from the xenon tube 100A is reflected as reflected light 101b having a wavelength shorter than the cut wavelength. Further, light having a wavelength longer than the cut wavelength is transmitted as transmitted light 101.

Next, in FIG. 7, in the irradiation light 100 irradiated from the xenon tube 100A to the reflection type filter 12 with an incident angle of θ1, a part of the light having a wavelength shorter than the cut wavelength becomes the reflected light 102b and the reflection angle. Is reflected at an angle θ1. Further, the remaining light becomes transmitted light 102a and passes through the reflective filter 12. Therefore, among the light having a wavelength shorter than the cut wavelength because the wavelength of the reflected light is shifted to the ultraviolet side, the light that is not reflected as the reflected light 102b becomes the transmitted light 102a and is larger than the cut wavelength. It passes through the reflective filter 12 together with light having a long wavelength.

The transmitted light 102a of the reflection type filter 12 is refracted by the refractive index of the reflection type filter 12 and is incident on the absorption type filter 11, and is also transmitted by the absorption type filter 11 with a predetermined refraction. Therefore, the paths of the reflected light 102b and the transmitted light 102a are as shown in FIG. Since the incident angle and the reflection angle are equal, the reflection angle is also the angle θ2 when the incident angle of the reflection type filter 12 described below is the angle θ2.

Next, in FIG. 7, in the irradiation light 100 irradiated from the xenon tube 100A to the reflection type filter 12 with an incident angle of θ2, a part of the light having a wavelength shorter than the cut wavelength is reflected as the reflected light 103b. The rest becomes transmitted light 103a and passes through the reflective filter 12. Therefore, since the wavelength of the reflected light shifts toward the ultraviolet ray, the reflected light 103b is reflected among the light having a wavelength shorter than the cut wavelength, and the reflection angle is reflected at the angle θ2. The unreflected light becomes transmitted light 103a, and is transmitted by the reflective filter 12 with predetermined refraction together with light having a wavelength longer than the cut wavelength.

The transmitted light 103a of the reflection type filter 12 is incident on the absorption type filter 11 and is transmitted by the absorption type filter 11 with predetermined refraction. Therefore, the paths of the reflected light 103b and the transmitted light 103a are as shown in FIG.

Moreover, as the angles θ1 and θ2 incident from the xenon tube 100A become larger, the reflected light 103b having a wavelength shorter than the cut wavelength of the reflective filter 12 decreases, and the transmitted light 103a increases.

On the other hand, light having a wavelength shorter than the cut wavelength of the strong irradiation light 100 vertically irradiated directly under the xenon tube 100A is reflected by the reflection type filter 12. Therefore, the light having a wavelength shorter than the cut wavelength that has been obliquely irradiated and transmitted through the reflective filter 12 without being reflected by the reflective filter 12 is absorbed, and the light having a wavelength shorter than the cut wavelength provided in the next stage is absorbed. By absorbing with the absorption type filter 11, it is possible to prevent light having a wavelength shorter than the cut wavelength from being transmitted. Therefore, the light energy absorbed by the absorption type filter 11 can be reduced.

As described above, the absorption type filter 11 and the reflection type filter 12 are used in combination to reflect the irradiation light 100 of the xenon tube 100A, and the absorption type filter 11 absorbs the transmitted light 102a to 103a not reflected by the reflection type filter 12. By configuring the above, the light energy absorbed by the absorption type filter 11 can be reduced. As a result, the temperature rise of the absorption type filter 11 can be suppressed. Further, it is possible to prevent deterioration of the absorption type filter 11 and extend the replacement period.

<Second Embodiment>
Next, a second embodiment of the present invention will be described. In this embodiment, the surface of the reflective filter 12 facing the light emitting lamp is formed in a substantially concave shape. Further, the surface of the reflection type filter 12 facing the absorption type filter 11 may be formed in a substantially convex surface shape to form a substantially concavo-convex lens shape. Further, the surface facing the absorption type filter 11 may be formed on a flat surface to form a substantially concave flat lens. Further, the surface facing the absorption type filter 11 may be formed in a substantially concave surface shape to be formed in a substantially concave lens shape.

When the surface facing the absorption type filter 11 is formed on a flat surface, that is, in a substantially concave flat lens shape, it is not necessary to process one side of the reflection type filter 12, and the distance between the reflection type filter 12 and the facing absorption type filter 11 can be maintained. Adhesion or attachment to the handpiece body 50 becomes easy.

Further, when the surface facing the absorption type filter 11 is formed in a substantially concave surface shape, that is, in a substantially biconcave lens shape, the transmitted light 102 to 103 and 102a to 103a are widely diffused, so that the radius of curvature R should be adjusted. Therefore, the intensities of the transmitted light 102 to 103 and 102a to 103a can be appropriately adjusted.

Hereinafter, in the present embodiment, a case where the surface facing the absorption type filter 11 is formed in a substantially concave surface shape and formed in a substantially concave-convex lens shape will be described as an example. FIG. 8 is a view of the left side surface in FIG. 5, that is, a view in the Y direction from an extension of the axis of the light source B of the xenon tube 100A. As shown in this figure, the reflection type filter 12, the absorption type filter 11, and the light guide body 15 are arranged in this order from the top in the Z direction at predetermined intervals. Then, the reflective filter 12 forms a surface facing the xenon tube 100A in a substantially concave cross section having a radius of curvature R, and forms the opposite surface, that is, a surface facing the absorption type filter 11 in a substantially convex cross section. is doing. The difference between the second embodiment and the first embodiment is that the shape of the cross section of the reflective filter 12 is formed in a substantially concavo-convex lens shape. Other than this, it is the same as the first embodiment.

In this embodiment, an example in which they are arranged at predetermined intervals will be described, but even if the reflection type filter 12, the absorption type filter 11, and the light guide body 15 arranged in the above order are brought into close contact with each other. good. In this case, since the shape of the reflection type filter 12 is formed in a substantially concavo-convex lens shape, the surface of the absorption type filter 11 and the light guide body 15 facing the reflection type filter 12 is formed on the surface of the reflection type filter 12. It is curved to fit the shape. Alternatively, depending on the radius of curvature of the concave surface, the surface of the absorption type filter 11 and the light guide body 15 facing the reflection type filter 12 may remain flat.

Next, the relationship between the irradiation angle of the xenon tube 100A and the transmitted light will be described. In FIG. 8, as for the irradiation light 100 perpendicularly irradiated to the reflection type filter 12 from the xenon tube 100A, light having a wavelength shorter than the cut wavelength is reflected as reflected light 101b. Further, light having a wavelength longer than the cut wavelength becomes transmitted light 101 and passes through the reflective filter 12.

Next, in FIG. 8, in the irradiation light 100 irradiated from the xenon tube 100A to the reflection type filter 12 at an angle θ1, a part of the light having a wavelength shorter than the cut wavelength is reflected as the reflected light 102b, and the rest thereof. Becomes transmitted light 102a and passes through the reflective filter 12. Therefore, among the light having a wavelength shorter than the cut wavelength because the wavelength of the reflected light is shifted to the ultraviolet side, the light that is not reflected as the reflected light 102b becomes the transmitted light 102a and is larger than the cut wavelength. It passes through the reflective filter 12 as transmitted light 102 together with light having a long wavelength.

The transmitted light 103a of the reflection type filter 12 is refracted by the refractive index of the reflection type filter 12 and is incident on the absorption type filter 11, and is also transmitted by the absorption type filter 11 with a predetermined refraction. Therefore, the paths of the reflected light 102b and the transmitted light 102a are as shown in FIG.

However, in the case of the present embodiment, when the irradiation angle to the reflection type filter 12 is the angle θ1, the incident angle is not the angle θ1 but the angle α. Then, since the incident angle and the reflection angle are equal to each other, the reflection angle is the angle α. This will be described in detail below.

Here, the angle of incidence of the light emitted from the xenon tube 100A at the angle θ1 on the reflective filter 12 is, as shown in FIG. 9, with respect to the point C which is the center of the radius of curvature R of the concave surface of the reflective filter 12. It becomes an angle α. Here, the angle α is obtained. A perpendicular line is drawn from the point C to the lowest point F of the reflective filter 12. Then, the lengths of the points C and F are the radius of curvature R.

Further, the intersection point where the light emitted at the angle θ1 is applied to the reflective filter 12 is defined as a point D. Therefore, when the point C is connected to the point D by a straight line, the length of the point C and the point D is also the radius of curvature R. Therefore, assuming that the light source of the xenon tube 100A is a point B, a triangle composed of a point C, a point B, and a point D is formed.

Therefore, since the sum of the internal angles of the triangles is π, ∠CBD is (π−θ1). Here, it is assumed that the ∠BCD consisting of the points B, C and D is the angle θ3, and the ∠CDB consisting of the points C, D and B is the angle α.
α = π- (π-θ1) -θ3 = θ1-θ3. That is, in the case of FIG. 7, the incident angle when the reflective filter 12 is irradiated with the angle θ1 is the angle θ1, whereas in the case of FIG. 9, when the reflective filter 12 is irradiated with the angle θ1. The angle of incidence of is α = θ1-θ3, and the angle α of the incident angle is smaller by the angle θ3 of ∠FCD than in the case of FIG.

From the above, even if the reflection type filter 12 is irradiated with the same angle θ1, in the case of FIG. 9, the incident angle is the angle α as compared with the case of FIG. 7, and the angle θ3 is smaller than the angle θ1. Therefore, the reflected light 103b increases and the transmitted light 103a decreases. Therefore, even if the transmitted light 103a is absorbed by the absorption type filter 11, the light energy is reduced. Therefore, the temperature rise can be further suppressed in FIG. 9 as compared with the case of FIG. 7.

Next, in FIG. 8, the irradiation light 103 irradiated from the xenon tube 100A to the reflective filter 12 at an angle θ2 will be described. In this case as well, as in the case where the irradiation angle is the angle θ1, all the light having a wavelength shorter than the cut wavelength becomes the reflected light 103b and is not reflected, and a part of the light becomes the transmitted light 103a to form the reflective filter 12. To Penetrate. Therefore, among the light having a wavelength shorter than the cut wavelength, the light that is not reflected as the reflected light 103b becomes the transmitted light 103a because the wavelength of the reflected light shifts to the ultraviolet side, and is larger than the cut wavelength. It passes through the reflective filter 12 as transmitted light 103 together with light having a long wavelength.

In this case, assuming that the angle θ1 which is the irradiation angle becomes the angle θ2, the angle θ3 becomes the angle θ4, and the angle α which is the incident angle becomes the angle β in FIG.
The formula of α = θ1-θ3 is β = θ2-θ4.
Here, assuming that the difference between the two is the angle Δθ,
Δθ = β-α = (θ2-θ4)-(θ1-θ3).
Here, in order to make the calculation easy to understand, consider the case where the angle θ4 is twice the angle θ3.
Therefore, if θ4 = 2 × θ3 is set, the angle Δθ is
Δθ = β-α = (θ2-θ4)-(θ1-θ3) = (θ2-2 × θ3)-(θ1-θ3)
= Θ2-2 × θ3-θ1 + θ3 = θ2-θ3-θ1 = θ2- (θ1 + θ3)
= (Θ2-θ1) −θ3.

As can be seen from this equation, although the incident angle changes from the angle θ1 to the angle θ2, the angle Δθ is further smaller than the angle (θ2-θ1) by the angle θ3.
As described above, even if the irradiation angle is increased from the angle θ1 to the angle θ2, the angle β of the incident angle does not increase so much.

From the above, even if the irradiation angle is increased and the reflection type filter 12 is irradiated, the angle β of the incident angle is not so large in the case of FIG. 9 as compared with the case of FIG. Therefore, the amount of reflected light 103b is larger than that in the case of FIG. 7, and the amount of transmitted light 103a is not so large. Therefore, the reflective filter 12 efficiently reflects the irradiation light 100 and suppresses the transmitted light 102a and 103a. Moreover, the light having a wavelength shorter than the predetermined wavelength of the strong light vertically irradiated directly under the xenon tube 100A is reflected as the reflected light 101b.

Therefore, the absorption type filter 11 absorbs the transmitted light 102a and 103a of the reflection type filter 12, but the light energy absorbed by the absorption type filter 11 is small. Therefore, according to the present embodiment, as compared with the case of FIG. 7, it is possible to further suppress the temperature rise, prevent deterioration of the absorption type filter 11, and extend the replacement period. Play.

<Handpiece cooling mechanism>
Next, the light energy absorbed by the absorption type filter 11 becomes thermal energy as described above. This heat energy is dissipated to the outside by a cooling mechanism provided inside the handpiece main body 50. As a result, the temperature rise of the handpiece main body 50 and the temperature rise of the absorption type filter 11 are suppressed. Hereinafter, the cooling mechanism built in the handpiece main body 50 will be described.

The xenon tube 100A is built in the handpiece 5A. The xenon tube 100A generates heat because a large current is passed in a pulse shape in order to emit light, and the temperature rise is large. Therefore, if no measures are taken, the handpiece 5A feels hot when it touches the skin of the person to be treated. Therefore, it is necessary to forcibly cool the xenon tube 100A and the handpiece main body 50.

Therefore, as shown in FIG. 1, the handpiece 5A on which the xenon tube 100A is mounted is connected to the apparatus main body 1 via the connector portion 8 and the connection cable 80. The connector portion 8 includes an electrical system connector 81 and a cooling system connector 82.

The electric system connector 81 arranges a power source for causing the xenon tube 100A to emit light, a power source for the Peltier unit for cooling the xenon tube 100A, and various signal lines to the handpiece 5A.

The cooling system connector 82 is a connector for passing cooling water for cooling the handpiece 5A and the xenon pipe 100A. It has two connectors, one for water supply and the other for water return.

The apparatus main body 1 has a built-in cooling water tank for storing cooling water for water supply (not shown), a water supply pump for supplying cooling water, and a cooling water tank for cooling return water. Then, the cooling water for cooling the xenon tube 100A built in the handpiece 5A is sent via the cooling system connector 82 and the connection cable 80.

As shown in FIG. 10, the handpiece main body 50 of the handpiece 5A contains a fixture 56 made of substantially aluminum die-cast, which is close to the back surface of the xenon tube 100A and fixes both ends thereof. A water passage hole 56a is formed in the fixture 56 near the back surface of the xenon tube 100A. Then, one cooling water pipe 56b is inserted into the inlet of the water passage hole 56a, and the other cooling water pipe 56c is inserted into the outlet of the water passage hole 56a.

The back surface of the xenon pipe 100A is directly cooled by passing cooling water through a water passage formed by one cooling water pipe 56b, a water passage hole 56a and the other cooling water pipe 56c connected in this way. It is configured. One cooling water pipe 56b and the other cooling water pipe 56c are connected to the cooling system connector 82 and connected to the apparatus main body 1 via the connection cable 80, as shown in FIG. The materials of the cooling water pipes 56b and 56c are not limited to metal, rubber, plastic or the like.

Since the piping system is configured so that the cooling water circulates as described above, when the water pump (not shown) built in the apparatus main body 1 operates, the cooling water is sent to the handpiece 5A and the xenon pipe 100A. And the handpiece body 50 can be forcibly cooled.

Further, as shown in FIG. 10, a Peltier device 61 is attached to the side surface or both side surfaces of the fixture 56. The Peltier unit 61 is a rectangular thin plate-shaped semiconductor element that utilizes the Peltier effect that heat is transferred from one metal to the other when an electric current is passed through the joints of two types of metals. As shown in FIG. 10, the Peltier unit 61 has two lead wires drawn out and connected to the electric system connector 81 shown in FIG. 1, and a predetermined current is energized from the apparatus main body 1. As described above, the fixture 56 is further configured to be cooled by the Peltier unit 61.

With such a configuration, cooling of the xenon tube 100A and the handpiece 5A can be promoted. Further, in conjunction with the cooling of the fixture 56, the reflective filter 12 and the absorption type filter 11 mounted on the fixture 56 made of die-cast aluminum can also be cooled.

Therefore, the heat generated by the absorption type filter 11 absorbing the light energy of the irradiation light 100 of the xenon tube 100A is transferred to the fixture 56 made of aluminum die-cast. Then, it is cooled by passing water through the cooling water pipe 56b inserted into the Peltier unit 61 and the water passage hole 56a. As a result, the temperature rise of the absorption type filter 11 can be suppressed, the deterioration of the absorption type filter 11 can be prevented, and the replacement period can be extended.

As described above, since the handpiece 5A is cooled, the light guide body 15 disposed on the irradiation portion 55 of the handpiece main body 50 does not feel hot even if it touches the skin of the person to be treated. In addition, the skin of the treated person is not exposed to light having a wavelength shorter than a predetermined wavelength that is not effective for hair removal and is not felt hot, so that the treated person can be provided with a comfortable hair removal treatment service.

The present invention is not limited to the above-mentioned configuration examples and embodiments, but the above-mentioned configurations and configurations disclosed in the above-mentioned embodiments are replaced with each other or the combinations are changed, known inventions, and the above-mentioned configuration examples and embodiments. It also includes configurations in which the configurations disclosed in the above are replaced with each other or the combinations are changed. Further, the technical scope of the present invention is not limited to the above-mentioned configuration examples and embodiments, but extends to the matters described in the claims and their equivalents.

1 Device body 5A Handpiece 8 Connector part 11 Absorption type filter 12 Reflective type filter 15 Light guide 30 Operation panel 31 Emergency stop button 32 Key switch 33 Display panel 36 SELECT button 50 Handpiece body 51 1st irradiation button 52 2nd irradiation Button 53 Display 54 Irradiation counter 55 Irradiation part 56 Fixture 56a Water passage hole 56b Cooling water pipe 56c Cooling water pipe 57 Irradiation window 59 Grip part 61 Pertier unit 80 Connection cable 81 Electrical system connector 82 Cooling system connector 100A Xenon tube 100 Irradiation light 101 Transmitted light 101b Reflected light 102 Transmitted light 102a Transmitted light 102b Reflected light 103 Transmitted light 103a Transmitted light 103b Reflected light 300 Hair removal processing device θ1 to θ4 angle α, β angle B Light source C Center point R radius of curvature

Claims (4)

A light emitting lamp, a reflective filter that reflects light having a wavelength shorter than a predetermined wavelength of the irradiation light of the light emitting lamp, and an absorption type filter that absorbs light having a wavelength shorter than a predetermined wavelength transmitted through the reflective filter. , Has a photo-hair removal handpiece. The handpiece for photo-epilation according to claim 1, wherein the light emitting lamp is composed of a xenon tube. The handpiece for photo-epilation according to claim 1, wherein the reflective filter has a surface facing the light emitting lamp formed into a substantially concave surface. A light emitting lamp, a reflective filter that reflects light having a wavelength shorter than a predetermined wavelength of the irradiation light of the light emitting lamp, and an absorption type filter that absorbs light having a wavelength shorter than a predetermined wavelength transmitted through the reflective filter. A hair removal treatment device with a handpiece for photoremoval, which has.

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