JP2009028268A - Light irradiating beauty instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform proper beauty treatment by light irradiation corresponding to the state of the skin by feeding back a change in the blood flow rate of the skin. <P>SOLUTION: This light irradiating beauty instrument is equipped with a light source part 2 for irradiating the skin with light for the beauty of the skin, a skin blood flow rate detecting means 3 for detecting the blood flow rate of the skin irradiated with the light from the light source part 2 and a control means 4 for controlling the light output of the light source part on the basis of the skin blood flow rate data obtained by the skin blood flow rate detecting means. The light irradiation is controlled according to the change in the blood flow rate of the skin by the light irradiation. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a light-irradiated beauty instrument that irradiates light to the skin for skin beauty.

  There are various types of light-irradiated beauty instruments that aim to beautify the skin by irradiating light, such as those that use laser light as the irradiating light and those that use low-power non-coherent light. In addition, there is one that detects the skin color and controls the light irradiation time according to the skin color (Patent Document 1), and the one that performs feedback control of light irradiation by an inlet signal corresponding to the electromagnetic wave on the skin surface (Patent Document 1) 2).

However, the former has a problem in that it cannot perform light irradiation control according to changes in the state of the skin during light irradiation. Moreover, in the latter, although feedback control is performed, the change of the blood flow rate by light irradiation cannot be fed back.
JP-A-5-146517 JP-A-9-285520

  The present invention has been invented in view of the above-mentioned conventional problems, and can provide feedback of changes in skin blood flow and can perform appropriate light irradiation beauty according to the state of the skin. It is an object to provide a beauty tool.

  In order to solve the above-mentioned problems, a light irradiation beauty instrument according to the present invention detects a blood source for irradiating the skin with light for skin beauty, and a blood flow rate of the skin irradiated with light from the light source And a control means for controlling the light output of the light source unit based on the skin blood flow data obtained by the skin blood flow detection means. Light irradiation is controlled in accordance with changes in skin blood flow due to light irradiation.

  Preferably, the control means determines whether or not the skin blood flow detection means is in contact with the skin from the output of the skin blood flow detection means and stops the light output from the light source unit when it is determined that the control means is not in contact. .

  As the skin blood flow rate detection means, a non-contact type that measures the skin blood flow rate in a non-contact manner can be suitably used.

  In the present invention, since light irradiation is controlled according to a change in skin blood flow due to light irradiation, it is possible to perform appropriate light irradiation according to changes in the state of the skin.

  Hereinafter, the present invention will be described based on an embodiment shown in the accompanying drawings. FIG. 1 shows a hand-held light-irradiating beauty instrument, and is attached to one end side of a housing 1 that is formed in a size that can be held by hand. Includes a light source 2 and a blood flow sensor 3 as skin blood flow detection means, and a control unit 4 for controlling light output from the light source 2 and a notification unit 5 are provided in the housing 1. Has been.

  The light source unit 2 includes a light source 20 and a cover 21 made of a light transmissive material disposed in the light irradiation opening. The cover 21 has a lens function such as light collection and light diffusion, and a wavelength. Those having a cutting function can be used. Although what kind of thing may be used as the said light source 20, what outputs the low output non-coherent light is used here.

  The blood flow sensor 3 is arranged at the periphery of the light irradiation opening and detects the blood flow of the skin by simultaneously contacting the skin when the light irradiation opening is brought into contact with the skin. As shown in FIG. 2, it comprises a sensor unit 30 and a spring 31 that urges the sensor 30, and when pressed against the skin, the contact pressure between the sensor unit 30 and the skin is kept substantially constant.

  The sensor unit 30 outputs laser light toward the skin and receives scattered light that has returned to the epidermis by scattering from skin tissue or blood cells. At this time, the light scattered by the moving red blood cells has a frequency transition. (Doppler shift) occurs, but the blood flow volume (blood volume × speed) in the tissue is obtained from the degree of this transition. Note that the scattered light of the tissue that is not moving can be excluded because it has the same frequency as the incident light. In FIG. 2, 30a is a laser light projection unit, and 30b is a scattered light receiving unit.

  If the light irradiation opening is pressed against the skin where the light is to be irradiated and the switch is turned on, the light source 20 of the light source 2 is turned on to start light irradiation on the skin, and at the same time, the blood flow sensor 3 causes the skin blood flow. Measure. When light irradiation is effectively acting on the skin, the blood flow volume of the skin increases. However, when blood flow is measured at a predetermined time interval (for example, every 1 minute), for example, a predetermined blood flow after 5 minutes. If an increase in the flow rate is not detected, the light irradiation intensity of the light from the light source unit 2 is increased by 1.5 times, and the light irradiation is stopped when a sufficient increase in blood flow is obtained.

  Moreover, the control part 4 alert | reports to a user that the light irradiation output is changed by operating the said alerting | reporting part 5 (for example, a speaker and a notification lamp) in the above light output control.

  When the irradiation is completed, the operation of the light source unit 2 and the blood flow sensor 3 is stopped via the control unit 4 by operating the switch again. A timer function may be mounted on the control unit 4 so that irradiation is automatically stopped, for example, in 20 minutes from the start of use.

  The interval of detection of skin blood flow should be detected at least 1 second or less, and when the detected skin blood flow is almost zero, the light irradiation output is stopped as the light irradiation opening is separated from the skin. It may be. If the light-irradiating opening is separated from the skin, light will leak out and this light may hurt your eyes. At this time, the light irradiation is stopped, which increases safety. In addition, the risk of mis-irradiation can be prevented without adding a separate safety device sensor.

  If the part that will come into contact with the skin is made of an elastic material that follows the uneven shape of the skin (including the curved surface), excluding the part of the blood flow sensor 3, for example, urethane sponge, light will leak further. Can be prevented.

  As the laser Doppler blood flow sensor 3, a non-contact type sensor is also provided. However, when this is used, a laser blood flow sensor 3 that does not bother the skin blood flow sensor 3 in contact with the skin during light irradiation is obtained. be able to. FIG. 3 shows an example of a light irradiation beauty instrument using such a non-contact blood flow sensor 3. The light source unit 2 is a movable arm with respect to the main body unit 10 used in a state of being placed on a desk or the like. 11, the light irradiation direction is variable, and the user can receive light irradiation from the light source unit 2 on the skin such as the face in an arbitrary posture. The blood flow sensor 3 is disposed on the surface of the light source unit 2. The light source unit 2 may be attached to the main body unit 10 so as to freely adjust the angle without using the movable arm 11.

It is a schematic sectional drawing of an example of embodiment of this invention. The blood flow rate sensor same as the above is shown, (a) is a sectional view, (b) is a perspective view of the sensor unit. FIG. 5 shows another example, in which (a) is a perspective view of a light source unit, and (b) and (c) are side views.

Explanation of symbols

2 light source unit 3 blood flow sensor 4 control unit 5 notification unit

Claims (3)

  Obtained by a light source unit that irradiates the skin with light for skin beauty, a skin blood flow detection unit that detects a blood flow rate of the skin irradiated with light from the light source unit, and a skin blood flow detection unit A light-irradiating cosmetic device comprising: control means for controlling light output of the light source unit based on skin blood flow data.   The control means determines whether the skin blood flow detection means is in contact with the skin from the output of the skin blood flow detection means, and stops the light output from the light source unit when it is determined that the skin blood flow detection means is not in contact. The light-irradiated beauty device according to claim 1.   2. The light irradiation cosmetic device according to claim 1, wherein the skin blood flow rate detection means is a non-contact type that measures the skin blood flow rate in a non-contact manner.

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