JP2009172095A - Cosmetic appliance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cosmetic appliance having light emitting diode lamps emitting red light as a light source which irradiates the skin with light having a wavelength with the greatest irradiation effect under a certain safety condition or the like. <P>SOLUTION: Twenty one light emitting diode lamps 1 emitting light having a wavelength of 625±5 nm are arranged on a lamp arrangement plate 2. The distance between the outer surface 3a of the bottom of the cap 3 and a light emitting point of each light emitting diode is set at 10 mm. A treatment is carried out by abutting the outer surface 3a (the energy density of the outer surface is 10±1 mW/square cm) on the skin. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cosmetic device that irradiates skin such as a face with light having a certain wavelength, for example, to beautify the skin, that is, to improve stains, wrinkles, etc., and particularly to red light emitted from a light emitting diode lamp. It relates to what is irradiated.

Conventionally, lasers and light-emitting diode lamps have been used as light sources in a cosmetic device that irradiates the skin with light of a certain wavelength to make the skin beautify. However, in a cosmetic device using a laser as a light source, burns, pigmentation, or the like may occur on the skin depending on the experience, proficiency level of the operator, skin quality of the patient, and the like. On the other hand, those using light-emitting diode lamps as light sources do not require a cooling device because they have little self-heating, and as a result, it is possible to make the entire cosmetic device compact, and in recent years, they have been widely used in the field of beauty. It has become.
JP-A-2005-276

By the way, among cosmetics that use light emitting diode lamps as light sources, those that emit red light have a relatively long red light wavelength of 610 to 750 nanometers, so that the influence of irradiation reaches the deep layers of the dermis. On the other hand, the bandwidth of this red light is relatively wide as described above, and it is unlikely that the effects and effects on the skin are the same at each wavelength in the band (for example, red light of 610 nanometers). And 750 nanometer red light are unlikely to have the same effect on the skin).
Therefore, when manufacturing a cosmetic device such as the one described above that emits red light, it is necessary to grasp which wavelength in the band is most preferable for the skin, and to perform irradiation at that wavelength. It is important to do. In this case, even if the wavelength is preferable for the skin, if the irradiation energy density is too large or if the irradiation time is too long, it is considered that unfavorable results such as pigmentation and occurrence of erythema are caused. The density and irradiation time should be determined in advance in consideration of the safety and operability of the cosmetic device, and based on that assumption, the wavelength at which the most favorable effect can be obtained while satisfying the assumption is grasped. The aim should be to produce a cosmetic device that is irradiated at that wavelength.
The present invention has been made in view of the circumstances as described above, and uses a light emitting diode lamp that emits red light as a light source, and has the largest preferable irradiation effect on the skin under certain conditions related to safety and the like. The purpose is to provide a cosmetic device that is irradiated at a wavelength.

First, an experiment was conducted to determine which wavelength of red light in the red light wavelength band (610 to 750 nanometers) has the most favorable effect on the skin. In this experiment, the irradiation energy density and one irradiation time were fixed to 10 ± 1 milliwatt / square centimeter and 10 minutes, respectively, in consideration of the safety and operability of the cosmetic device.
Further, the irradiation light to be investigated has a wavelength of 610 ± 5 nanometers (hereinafter referred to as the first wavelength), 625 ± 5 nanometers (hereinafter referred to as the second wavelength), 700 ± 15 nanometers (hereinafter referred to as the third wavelength). The following samples irradiated with these lights are referred to as a first sample, a second sample, and a third sample. A sample for which the experiment is completed without any irradiation is called a fourth sample.

FIG. 1 is a diagram for explaining the procedure of the experiment. As shown in the figure (a), human neonatal foreskin-derived fiber cells (9000 cells) were used as an alternative to human skin, seeded in a 35 mm petri dish together with a medium, under 37 ° C, 5% CO ₂ In culture. Then, once a day, as shown in FIGS. (B), (c), and (d), the medium was separately collected, and 0.7 ml of buffer solution (HBSS) was added instead. The cells were irradiated with red light of the predetermined wavelength for each sample for 10 minutes from above so that the irradiation energy density at the bottom of the petri dish was 10 ± 1 milliwatt / square centimeter (for example, the first The sample is irradiated with red light of the first wavelength). In addition, the 4th sample which is not receiving irradiation at all was left in the buffer solution without receiving irradiation with specific wavelength light in the state of FIG.

After the irradiation treatment, the buffer solution was removed as shown in FIGS. 4E and 4F, and the collected medium was returned again as shown in FIG. 2G.
A series of culture and irradiation treatments for 24 hours, that is, 1 day as described above were repeated for 7 days. On the third day only, the medium was changed instead of returning the collected medium as shown in FIG.

Next, the effect of irradiation on each sample subjected to the culture and irradiation treatment as described above was examined.
First, the number of cells on day 6 and day 7 after cell seeding was counted. The counting results are shown in FIG. As can be seen from the figure, on the 6th and 7th days of culture, the second sample irradiated with light having a wavelength of 625 ± 5 nanometers has significantly higher cell proliferation ability than the non-irradiated fourth sample. However, in the sample irradiated with light of other wavelengths, the difference from the fourth sample is not recognized.
Next, the 7th day culture medium of the second sample irradiated with light of wavelength 625 ± 5 nm and the fourth sample not irradiated was collected, stored at −20 ° C., and hyaluron in the culture supernatant. The amount of acid was measured by the ELISA method. FIG. 3 shows the measurement results. As can be seen from FIG. 3, the second sample irradiated with light having a wavelength of 625 ± 5 nanometers shows an increasing tendency in the amount of hyaluronic acid.
From the experimental results as described above, when the irradiation energy density and the time of one irradiation are fixed to 10 ± 1 milliwatt / square centimeter and 10 minutes, respectively, taking into account the safety of the cosmetic device, etc. The wavelength having the largest preferable irradiation effect is about 625 ± 5 nanometers.

In the invention of claim 1, based on the above knowledge, a cosmetic device for irradiating light from a light emitting diode lamp to the skin for the purpose of beauty is configured as follows.
That is, a light source unit in which a plurality of light emitting diode lamps that emit light having a wavelength of 625 ± 5 nanometers are arranged on a flat lamp arrangement plate,
Interval holding used to maintain the distance from the light emitting portions of the plurality of light emitting diode lamps to the skin irradiated by the light emitting diode lamps at a distance where the light irradiation energy density on the skin is 10 ± 1 milliwatt / square centimeter. And
When a predetermined switch input is obtained, power supply to the plurality of light emitting diode lamps is started to start light emission of the plurality of light emitting diode lamps. And an irradiation time control unit for stopping the light emission by stopping the power supply.

  According to a second aspect of the present invention, the gap holding portion is a cap that is worn in a state of covering the light source portion, and the bottom portion that comes into contact with the skin is made of a relatively thin light-transmitting transparent material. In the wearing state, the distance from the light emitting portion of the plurality of light emitting diode lamps is a flat surface at the desired distance.

  As described in detail above, the present invention uses a light-emitting diode lamp that emits red light as a light source, and irradiation is performed at a wavelength with the largest preferable irradiation effect on the skin under certain conditions related to safety and the like. Since it is applied to a cosmetic device, it is possible to provide a cosmetic device effective for the favorable irradiation effect on the skin, that is, the activation of fibroblasts in the skin dermis and the resulting increase in hyaluronic acid, and the improvement of wrinkles, etc. .

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 4 shows the configuration of the light source unit 10 that is the main part of the present embodiment and the positional relationship between the light source unit 10 and the gripping housing unit 20. FIG. 4A is a front view of the light source unit 10 when viewed from the front. 21 light-emitting diode lamps 1 that emit light having a total output of 0 and 4 watts and a wavelength of 625 ± 5 nanometers (in the figure, only three light-emitting diode lamps are shown, Are drawn along a circumference of 40 mm in diameter on the disk-shaped lamp arrangement plate 2. The light emitting diode lamp 1 can be observed from the front side through a transparent cap 3.

  FIG. 4B is a side view of the light source unit 10 and the gripping housing unit 20 when viewed from the side. Only the cap 3 is a cut side view when cut along the center line of FIG. 4A. The distance from the outer surface 3a of the bottom surface of the cap 3 to the light emitting point position of each light emitting diode lamp, that is, the above-mentioned desired distance is 10 millimeters. Therefore, when power is supplied to the 21 light emitting diode lamps and they are lit, the energy density on the outer surface 3a is 10 ± 1 milliwatt / square centimeter. When a predetermined switch (not shown) is operated, each of the light emitting diode lamps is turned on by an irradiation time control unit in a control circuit unit (not shown) in the gripping housing unit 20, and then 10 minutes have passed. Turns off when

  When performing the treatment on the skin such as the face using the embodiment configured as described above, the switch is operated while the outer surface 3a of the cap 3 is in contact with the skin. As a result, the skin is irradiated with light having a wavelength of 625 ± 5 nanometers at an energy density of 10 ± 1 milliwatt / square centimeter for 10 minutes, and wrinkles and the like formed on the skin are improved. .

When the degree of improvement of the facial skin when the above embodiment was used in actual treatment was measured, it was as follows. That is, the treatment for 10 minutes using the above embodiment is performed 13 times at a rate of 3 times a week, and the state of facial wrinkles before and after the 13 times of treatment follows the line a in FIG. From 5 points to 3 points (in this case, the number of contacts between the line a and 皺 is used as the number of points. The same applies hereinafter), from 4 points to 3 points along the line b, to the line c Along the line, the number decreased from 5 to 3 and improvement was observed.
Also, the length of the eyelid heel before and after the 13 treatments was reduced from 1 to 0.82.

In the above-described embodiment, the gap holding portion is the transparent cap 3, but is not limited thereto, and may be a cylindrical shape having no portion corresponding to the bottom surface of the cap 3, for example.
The scope of the present invention is not limited to the above-described embodiment, and various modifications can be applied.

  The present invention has a possibility of being used in an industry for manufacturing a cosmetic device that improves the condition of the skin by irradiating the skin with light.

It is a figure explaining the procedure of the experiment for investigating the wavelength from which the most preferable effect on skin is acquired. It is a figure which shows the result of the said experiment. It is a figure which shows the result of the said experiment. It is a figure which shows the structure of the light source part in embodiment of this invention. It is a figure for demonstrating the result of the treatment using the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light emitting diode lamp 2 Lamp arrangement | positioning board 3 Cap 3a Outer surface 10 Light source part 20 Grasping housing part

Claims (2)

A cosmetic device that irradiates the skin with light from a light-emitting diode lamp for the purpose of beauty,
A light source unit in which a plurality of light emitting diode lamps that emit light having a wavelength of 625 ± 5 nanometers are disposed on a flat lamp disposition plate;
The distance from the light emitting part of the plurality of light emitting diode lamps to the skin irradiated by the light emitting diode lamp is a distance (hereinafter referred to as a desired distance) at which the light irradiation energy density on the skin is 10 ± 1 milliwatt / square centimeter. An interval holding unit used to maintain;
When a predetermined switch input is obtained, power supply to the plurality of light emitting diode lamps is started to start light emission of the plurality of light emitting diode lamps. A cosmetic device comprising: an irradiation time control unit that stops the light emission by stopping the power supply. The interval holding part is composed of a cap that is crowned in a state of covering the light source part, and the bottom surface part that comes into contact with the skin is made of a relatively thin light-transmitting transparent material, 2. The cosmetic device according to claim 1, wherein a distance from the light emitting portion of the light emitting diode lamp is a flat surface at the desired distance.

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