WO2021171681A1

WO2021171681A1 - Electric shaver

Info

Publication number: WO2021171681A1
Application number: PCT/JP2020/038076
Authority: WO
Inventors: 美咲近藤; 清水　宏明; 村木　健一; 楊　康太郎
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2020-02-25
Filing date: 2020-10-08
Publication date: 2021-09-02
Also published as: JP2021132757A; EP4112252A4; EP4112252A1; CN115135470A

Abstract

An electric shaver according to the present disclosure comprises: an outer blade which makes contact with the skin surface; an inner blade which cuts body hair on the skin surface in cooperation with the outer blade by means of a reciprocating linear movement with respect to the outer blade; and an electrode which makes contact with the skin surface and supplies a weak electric current to the skin surface. The electrode has: a first electrode part on which is formed a first electrode surface disposed side by side with the outer blade; and a second electrode part on which is formed a second electrode surface that is suspended from the first electrode surface in a direction intersecting the first electrode surface.

Description

Electric razor

This disclosure relates to an electric razor.

An electric razor that has both a shaving function for shaving body hair and a skin care function for skin care is known (see, for example, Patent Document 1). The blade head of this type of electric razor includes an outer blade, an inner blade that reciprocates linearly with respect to the outer blade, and an electrode portion for supplying a weak electric current to the skin surface. The outer blade has a pair of net outer blades and a slit blade arranged between the pair of net outer blades. The electrode portion is arranged between one of the pair of net outer blades and the slit blade.

With the outer blade in contact with the skin surface, the inner blade reciprocates linearly with respect to the outer blade, so that the hair inserted into the blade hole of the outer blade is cut by the scissors between the inner blade and the outer blade. NS. Further, the skin surface can be cared for by supplying a weak electric current from the electrode portion to the skin surface in a state where the electrode portion is in contact with the skin surface.

Japanese Unexamined Patent Publication No. 2006-343322

However, with the conventional electric razor described above, even if the user only wants to care for the skin surface, the outer blade and the electrode portion come into contact with the skin surface at the same time, so that the skin surface is damaged by the outer blade. The problem arises that there is a risk.

The present disclosure has been made in view of such a problem, and an object of the present invention is to provide an electric razor capable of effectively caring for the skin surface while suppressing damage to the skin surface caused by the outer blade. And.

In order to solve the above problems, the electric razor according to one aspect of the present disclosure has an outer blade that comes into contact with the skin surface and a reciprocating linear motion with respect to the outer blade, thereby cooperating with the outer blade to make the skin. An inner blade for cutting body hair on the surface and an electrode that contacts the skin surface and supplies a weak electric current to the skin surface are provided, and the electrode has a first electrode surface arranged side by side with the outer blade. It has a formed first electrode portion and a second electrode portion on which a second electrode surface is formed that hangs down from the first electrode surface along a direction intersecting the first electrode surface. ..

According to the electric razor according to one aspect of the present disclosure, it is possible to effectively care for the skin surface while suppressing damage to the skin surface due to the outer blade.

It is a perspective view which shows the electric razor which concerns on embodiment. It is a front view which shows the electric razor which concerns on embodiment. It is a side view which shows the electric razor which concerns on embodiment. It is a rear view which shows the electric razor which concerns on embodiment. It is a perspective view which shows the blade head which concerns on embodiment. It is a front view which shows the blade head which concerns on embodiment. It is a top view which shows the blade head which concerns on embodiment. It is a side view which shows the blade head which concerns on embodiment. FIG. 6 is a cross-sectional view of a main part of the blade head according to the embodiment according to the VI-VI line of FIG. It is a rear view which shows the blade head which concerns on embodiment with the outer blade cassette removed. It is a top view which shows the blade head which concerns on embodiment with the outer blade cassette removed. It is a figure for demonstrating the arrangement of the 1st temperature sensor and the 2nd temperature sensor in the blade head which concerns on embodiment. It is a perspective view which shows the 1st temperature sensor which concerns on embodiment. It is a block diagram which shows the functional structure of the electric razor which concerns on embodiment. It is a figure which shows an example of the application pattern of the voltage applied to the electrode of the electric razor which concerns on embodiment. It is a figure which shows an example of the application pattern of the voltage applied to the electrode of the electric razor which concerns on embodiment. It is a figure which shows an example of the application pattern of the voltage applied to the electrode of the electric razor which concerns on embodiment. It is a figure which shows an example of the application pattern of the voltage applied to the electrode of the electric razor which concerns on embodiment. It is a figure for demonstrating the use method in the 1st mode of the electric razor which concerns on embodiment. It is a figure for demonstrating the use method in the 2nd mode of the electric razor which concerns on embodiment.

Hereinafter, the embodiment will be specifically described with reference to the drawings.

Note that all of the embodiments described below show comprehensive or specific examples. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, etc. shown in the following embodiments are examples, and are not intended to limit the present disclosure. Further, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept are described as arbitrary components.

Also, each figure is a schematic diagram and is not necessarily exactly illustrated. In each figure, substantially the same configuration is designated by the same reference numerals, and duplicate description will be omitted or simplified.

(Embodiment)
[1. Overall structure of electric razor]
First, the overall structure of the electric razor 2 according to the embodiment will be described with reference to FIGS. 1A to 1D. FIG. 1A is a perspective view showing the electric razor 2 according to the embodiment. FIG. 1B is a front view showing the electric razor 2 according to the embodiment. FIG. 1C is a side view showing the electric razor 2 according to the embodiment. FIG. 1D is a rear view showing the electric razor 2 according to the embodiment.

In FIGS. 1A to 1D, the left-right direction of the electric shaving 2 is the X-axis direction, the front-back direction of the electric shaving 2 is the Y-axis direction, and the vertical direction of the electric shaving 2 is the Z-axis direction.

The electric razor 2 according to the embodiment is an electric razor having both a shaving function for shaving the hair (beard) grown on the skin surface of the human body and a skin care function for caring for the skin surface of the human body. As shown in FIGS. 1A to 1D, the electric razor 2 includes a razor main body 4 and a blade head 6.

The razor body 4 has a grip portion 8 and a connecting portion 10. The grip portion 8 is formed in a substantially bottomed cylindrical shape, and is formed in a long shape along the vertical direction (Z-axis direction). The grip portion 8 is made of, for example, resin or the like. When using the electric razor 2, the user grips the grip portion 8 by hand. A secondary battery (not shown) for supplying electric power to each electronic component or the like is arranged inside the grip portion 8.

As shown in FIGS. 1A and 1B, a power switch 12, a current changeover switch 14, and a temperature changeover switch 16 are arranged on the front surface 8a of the grip portion 8. The power switch 12 is a switch for switching the power on / off of the electric razor 2. The current changeover switch 14 is a switch for switching the weak current supplied from the electrode 30 (described later) to the skin surface in, for example, three stages (“strong”, “weak”, and “off”). The temperature changeover switch 16 is a switch for switching the temperature of the electrode 30 in, for example, three stages (“high”, “low”, and “off”).

As shown in FIGS. 1C and 1D, a counter electrode portion 18 made of metal, for example, is arranged on the back surface 8b of the grip portion 8. The counter electrode portion 18 is formed in a long shape along the longitudinal direction (Z-axis direction) of the grip portion 8. It is preferable that the counter electrode portion 18 has an arrangement, shape and size so that the user's palm or finger surely contacts the counter electrode portion 18 when the user grips the grip portion 8 by hand. .. The material of the counter electrode portion 18 is not limited to metal, and may be, for example, a conductive resin or a surface of an insulating resin coated with metal plating.

The connecting portion 10 is arranged at one end of the grip portion 8 in the longitudinal direction. The connecting portion 10 swingably connects the blade head 6 to the grip portion 8 in the front-rear direction (Y-axis direction), the left-right direction (X-axis direction), or both directions.

The blade head 6 has a blade surface 20 for shaving the body hair that grows on the skin surface in a state of being in contact with the skin surface. Further, the blade head 6 swings in the front-rear direction, the left-right direction, or both directions with respect to the razor main body 4. As a result, when the user grips the grip portion 8 by hand and moves the blade head 6 on the skin surface while pressing the blade surface 20 against the skin surface, the blade surface 20 follows the shape of the skin surface. It comes into close contact with the skin surface.

[2. Blade head structure]
Next, the structure of the blade head 6 will be described with reference to FIGS. 2 to 8B. FIG. 2 is a perspective view showing the blade head 6 according to the embodiment. FIG. 3 is a front view showing the blade head 6 according to the embodiment. FIG. 4 is a top view showing the blade head 6 according to the embodiment. FIG. 5 is a side view showing the blade head 6 according to the embodiment. FIG. 6 is a cross-sectional view of a main part of the blade head 6 according to the embodiment according to the VI-VI line of FIG. FIG. 7A is a rear view showing the blade head 6 according to the embodiment with the outer blade cassette 34 removed. FIG. 7B is a top view showing the blade head 6 according to the embodiment with the outer blade cassette 34 removed. FIG. 8A is a diagram for explaining the arrangement of the first temperature sensor 48 and the second temperature sensor 50 in the blade head 6 according to the embodiment. FIG. 8B is a perspective view showing the first temperature sensor 48 according to the embodiment.

As shown in FIGS. 2 to 5, the blade head 6 has a blade frame 22, an outer blade 24, a roller 26, an inner blade 28, and an electrode 30.

The blade frame 22 has a frame body 32 and an outer blade cassette 34. The frame body 32 is swingably connected to one end of the grip portion 8 in the longitudinal direction via the connecting portion 10 in the front-rear direction, the left-right direction, or both directions. The outer blade cassette 34 is detachably attached to the frame body 32.

The outer blade 24 is supported by the outer blade cassette 34. The outer blade 24 has three outer blades, that is, a first net outer blade 24a, a slit blade 24b, and a second net outer blade 24c. The first net outer blade 24a, the slit blade 24b, and the second net outer blade 24c are arranged side by side in this order in the front-rear direction. The above-mentioned blade surface 20 is defined by the first net outer blade 24a, the slit blade 24b, and the second net outer blade 24c. Each of the first net outer blade 24a, the slit blade 24b, and the second net outer blade 24c may be formed of a metal such as stainless steel, or may be formed of a resin. Further, in the present embodiment, the outer blade 24 has three outer blades, but the present invention is not limited to this, and the outer blade 24 may have an arbitrary number of outer blades.

As shown in FIGS. 2 and 4, each of the first net outer blade 24a and the second net outer blade 24c is elongated along the left-right direction (X-axis direction) (an example of a predetermined direction). It is formed and arranged substantially parallel to each other. In the front view of XZ shown in FIG. 3, each of the first net outer blade 24a and the second net outer blade 24c is convex in the upward direction (plus side of the Z axis) in the longitudinal direction (X axis). It is formed in a rounded shape that curves along the direction). Further, in the YZ side view shown in FIG. 5, each of the first net outer blade 24a and the second net outer blade 24c is along the lateral direction (Y-axis direction) so as to be convex upward. It is formed by being curved in an inverted U shape. A plurality of blade holes (not shown) are formed in each of the first net outer blade 24a and the second net outer blade 24c.

As shown in FIGS. 2 and 4, the slit blade 24b is formed in a long shape along the left-right direction, and is substantially parallel to each of the first net outer blade 24a and the second net outer blade 24c. Have been placed. In the YZ side view shown in FIG. 5, the slit blade 24b is formed in a substantially inverted U shape (U shape) along the lateral direction (Y axis direction). That is, the upper surface of the slit blade 24b (the surface defining the blade surface 20) is formed as a flat surface. A plurality of slit-shaped blade holes 36 (see FIG. 4) are formed in the slit blade 24b.

As shown in FIGS. 2 and 4, the roller 26 is rotatably supported by the outer blade cassette 34. The roller 26 is formed in a long shape along the left-right direction, and is arranged between the first net outer blade 24a and the first electrode portion 42 (described later) of the electrode 30. As shown in FIG. 6, the roller 26 projects toward the skin surface side (plus side of the Z axis) of the blade surface 20 of the outer blade 24 and the first electrode surface 42a (described later) of the first electrode portion 42. ing. That is, the roller 26 projects toward the skin surface side from the plane 38 (indicated by the alternate long and short dash line in FIG. 6) including the blade surface 20 and the first electrode surface 42a.

As shown in FIG. 7A, the inner blade 28 is supported by the frame body 32 via the inner blade driver 40, and is arranged between the outer blade 24 and the frame body 32. As shown in FIG. 7B, the inner blade 28 has three inner blades, that is, a first inner blade 28a, a slit inner blade 28b, and a second inner blade 28c. The first inner blade 28a, the slit inner blade 28b, and the second inner blade 28c are arranged so as to face the first net outer blade 24a, the slit blade 24b, and the second net outer blade 24c, respectively.

By driving the inner blade driver 40, the first inner blade 28a, the slit inner blade 28b, and the second inner blade 28c are the first net outer blade 24a, the slit blade 24b, and the second net outer blade, respectively. With respect to 24c, it reciprocates linearly with a predetermined amplitude in the left-right direction. As a result, the body hair inserted into the respective blade holes of the first net outer blade 24a and the second net outer blade 24c and the blade hole 36 of the slit blade 24b becomes the first net outer blade 24a and the slit blade 24b. The second net outer blade 24c is cut by sandwiching the first inner blade 28a, the slit inner blade 28b, and the second inner blade 28c in cooperation with each other.

The electrode 30 is for caring for the skin surface by supplying a weak electric current to the skin surface in contact with the skin surface. As shown in FIGS. 2 to 5, the electrode 30 is made of, for example, metal and is supported by the outer blade cassette 34. The electrode 30 has a first electrode portion 42 and a second electrode portion 44, and is formed in a substantially inverted J-shaped plate shape in a YZ cross-sectional view as a whole. The material of the electrode 30 is not limited to metal, and may be, for example, a conductive resin or a surface of an insulating resin coated with metal plating.

As shown in FIGS. 2 to 5, the first electrode portion 42 is arranged on the top surface of the blade head 6 (the surface on which the blade surface 20 is arranged). A first electrode surface 42a is formed on the outer surface of the first electrode portion 42. The first electrode surface 42a is arranged side by side with the blade surface 20 in the front-rear direction (direction substantially perpendicular to the left-right direction).

As shown in FIG. 3, the first electrode surface 42a is formed in a rounded shape that curves along the left-right direction so as to be convex upward. At this time, the curvature of the radius shape of the first electrode surface 42a is the same (including substantially the same) as the curvature of each radius shape of the first net outer blade 24a and the second net outer blade 24c. As a result, when the blade surface 20 and the first electrode surface 42a are brought into contact with the skin surface at the same time in the first mode described later, the blade surface 20 and the first electrode surface 42a are brought into contact with the skin at substantially the same pressure. Can be pressed against the surface. As a result, it is possible to prevent only the blade surface 20 from being strongly pressed against the skin surface, so that the skin surface can be gently cared for. Further, since it is possible to avoid that only the first electrode surface 42a is strongly pressed against the skin surface, the blade surface 20 can be firmly adhered to the skin surface, and shaving can be effectively performed. ..

As shown in FIGS. 2 to 5, the second electrode portion 44 is arranged on the front surface of the blade head 6 (the surface hanging from the top surface of the blade head 6 toward the front surface 8a side of the grip portion 8). A second electrode surface 44a is formed on the outer surface of the second electrode portion 44. The second electrode surface 44a extends continuously from the first electrode surface 42a. Specifically, the second electrode surface 44a hangs down from the first electrode surface 42a along the direction intersecting the first electrode surface 42a (minus side of the Z axis). The second electrode surface 44a has a larger area than the first electrode surface 42a.

As shown in FIG. 4, when the blade surface 20 is viewed in the XY plane, the second electrode surface 44a is curved in the left-right direction so as to be convex toward the front (minus side of the Y axis). It is formed in a rounded shape. Thereby, in the second mode described later, when the second electrode surface 44a is brought into contact with the skin surface, for example, the second electrode surface 44a can be efficiently fitted to the recessed surface of the face.

Further, as shown in FIGS. 5 and 6, the boundary portion 46 between the first electrode surface 42a and the second electrode surface 44a is formed in a rounded shape. As a result, when the blade surface 20 and the first electrode surface 42a are brought into contact with the skin surface at the same time in the first mode described later, and in the second mode described later, the second electrode surface 44a is brought into the skin. When it comes into contact with the surface, it is possible to secure a large contact area of the first electrode surface 42a or the second electrode surface 44a with respect to the skin surface.

As shown in FIG. 8A, a first temperature sensor 48 and a second temperature sensor 50 (an example of a temperature sensor) are embedded in the first electrode surface 42a and the second electrode surface 44a, respectively. The first temperature sensor 48 detects the temperature of the skin surface in contact with the first electrode surface 42a. The second temperature sensor 50 detects the temperature of the skin surface in contact with the second electrode surface 44a. As shown in FIGS. 8B (a) and 8B, the first temperature sensor 48 includes a temperature detection block 52 and a heat insulating sheet 54. The temperature detection block 52 detects the temperature of the skin surface in contact with the first electrode surface 42a, and outputs temperature data indicating the detected temperature to the control unit 62 (described later). The heat insulating sheet 54 is arranged so as to cover the surface of the temperature detection block 52, and blocks heat transfer from the first electrode portion 42 to the temperature detection block 52. Since the configuration of the second temperature sensor 50 is the same as the configuration of the first temperature sensor 48, the description thereof will be omitted.

[3. Functional configuration of electric razor]
Next, the functional configuration of the electric razor 2 according to the embodiment will be described with reference to FIGS. 9 to 13. FIG. 9 is a block diagram showing a functional configuration of the electric razor 2 according to the embodiment. Each of FIGS. 10 to 13 is a diagram showing an example of an application pattern of a voltage applied to the electrode 30 of the electric razor 2 according to the embodiment.

As shown in FIG. 9, the electric razor 2 has a first temperature sensor 48, a second temperature sensor 50, a drive unit 56, a voltage supply unit 58, a heater 60, and a control unit 62 as functional configurations. And have.

The first temperature sensor 48 detects the temperature of the skin surface in contact with the first electrode surface 42a, and outputs temperature data indicating the detected temperature to the control unit 62. The second temperature sensor 50 detects the temperature of the skin surface in contact with the second electrode surface 44a, and outputs temperature data indicating the detected temperature to the control unit 62.

The drive unit 56 is a motor for driving the inner blade driver 40. Although not shown in FIGS. 1A to 1D, the drive unit 56 is arranged inside, for example, the razor main body 4.

The voltage supply unit 58 is a voltage supply source for applying a predetermined voltage to the electrode 30. Although not shown in FIGS. 1A to 1D, the voltage supply unit 58 is arranged inside, for example, the razor main body 4. When the voltage supply unit 58 applies a predetermined voltage to the electrode 30, a weak current of, for example, about several μA is supplied to the skin surface in contact with the electrode 30. A bioelectric current of 100 to 200 μA flows through the human body, and it has been demonstrated that the natural healing power is enhanced by passing a weak current close to this bioelectric current from outside the body to the human body.

The voltage supply unit 58 sets the predetermined voltage applied to the electrode 30 as a) a DC voltage having a constant voltage value L1 as shown in FIG. 10, b) a DC voltage of a square wave L2 as shown in FIG. 11, and c) FIG. The AC voltage of the sinusoidal wave L3 as shown in 12 or d) the AC voltage of the square wave L4 as shown in FIG. 13 can be applied. Further, although not shown, the voltage supply unit 58 may apply an AC voltage such as a triangular wave as a predetermined voltage to be applied to the electrode 30. In the example shown in FIG. 10, the voltage supply unit 58 applies a DC voltage having a constant voltage value V1 in the range of 0.01 to 20V to the electrode 30 in order to activate the skin tissue on the skin surface. Is preferable. When the constant voltage value L1 is lower than 0.01V, the skin surface cannot be kept in a normal potential state. On the other hand, when the constant voltage value L1 exceeds 20 V, an excessive current may flow on the skin surface and the cells on the skin surface may decrease due to electrolysis.

The predetermined voltage applied by the voltage supply unit 58 may be any kind of voltage, for example, a constant voltage, a pulse voltage, or a voltage whose voltage value fluctuates periodically. For example, when the predetermined voltage is a DC voltage and the voltage value such as the pulse voltage (60 Hz to 1 MHz) fluctuates, the average voltage value or the peak voltage value is within the above range of 0.01 to 20 V. It is preferable to have it. Further, when constant current control is performed, it is preferable that the average voltage value of a predetermined voltage is within the above range of 0.01 to 20 V. On the other hand, when the predetermined voltage is an AC voltage, the peak voltage value of the predetermined voltage is preferably in the above range of 0.01 to 20 V. Here, when the predetermined voltage is an AC voltage, a weak current can be supplied to the skin surface even if the voltage value is relatively low, and the frequency is increased even if the voltage value is relatively high. It is possible to reduce the electrical pain given to the user.

In the present embodiment, the case where the voltage supply unit 58 performs constant voltage control has been described, but the present invention is not limited to this, and constant current control may be performed. In this case, the voltage value fluctuates depending on the conditions and the like. Therefore, even in this case, the average voltage value or the peak voltage value is preferably in the range of 0.01 to 20V.

The heater 60 is a heat source for heating the electrode 30. Although not shown in FIGS. 1A to 1D, the heater 60 is arranged inside, for example, the blade head 6.

The control unit 62 controls the drive unit 56 based on the operation of the power switch 12 by the user. Specifically, when the user operates the power switch 12 to turn on the power of the electric razor 2, the control unit 62 controls the drive unit 56 so as to drive the inner blade driver 40. When the user operates the power switch 12 to turn off the power of the electric razor 2, the control unit 62 controls the drive unit 56 so as to stop the drive of the inner blade driver 40.

The control unit 62 may control the drive unit 56 based on the detection result of the first temperature sensor 48 or the second temperature sensor 50. Specifically, when the temperature of the skin surface detected by the first temperature sensor 48 or the second temperature sensor 50 is equal to or higher than the threshold value, the control unit 62 determines that the skin surface is inflamed. Then, the drive unit 56 is controlled so as to reduce the amplitude of the inner blade 28. As a result, it is possible to suppress the burden on the skin surface during shaving. On the other hand, when the temperature of the skin surface detected by the first temperature sensor 48 or the second temperature sensor 50 is less than the above threshold value, the control unit 62 determines that the skin surface condition is good. The drive unit 56 is controlled so as to increase the amplitude of the inner blade 28. This makes it possible to shave the body hair deeply during shaving.

Further, the control unit 62 controls the voltage supply unit 58 based on the operation of the current changeover switch 14 by the user. Specifically, when the user operates the current changeover switch 14 to switch the weak current supplied from the electrode 30 to the skin surface to "strong", the control unit 62 supplies the weak current from the electrode 30 to the skin surface. The voltage supply unit 58 is controlled so that the weak current to be generated becomes the first current value. When the user operates the current changeover switch 14 to switch the weak current supplied from the electrode 30 to the skin surface to "weak", the control unit 62 receives the weak current supplied from the electrode 30 to the skin surface. The voltage supply unit 58 is controlled so that the second current value is smaller than the first current value. When the user operates the current changeover switch 14 to switch the weak current supplied from the electrode 30 to the skin surface to "OFF", the control unit 62 supplies the weak current from the electrode 30 to the skin surface. The voltage supply unit 58 is controlled so as to stop.

Further, the control unit 62 switches the drive unit 56 and the voltage supply unit from one of the first mode in which shaving and skin care are performed at the same time and the second mode in which only skin care is performed. Control 58. In the first mode, the control unit 62 controls the drive unit 56 so as to drive the inner blade driver 40, and controls the voltage supply unit 58 so that a weak current is supplied from the electrode 30 to the skin surface. do. In the second mode, the control unit 62 controls the drive unit 56 so as to stop the drive of the inner blade driver 40, and the voltage supply unit 58 so that a weak current is supplied from the electrode 30 to the skin surface. To control.

Further, the control unit 62 controls the energization of the heater 60 based on the operation of the temperature changeover switch 16 by the user. Specifically, when the user operates the temperature changeover switch 16 to switch the temperature of the electrode 30 to "high", the control unit 62 sets the temperature of the electrode 30 to be the first temperature. Controls the energization of the heater 60. When the user operates the temperature changeover switch 16 to switch the temperature of the electrode 30 to "low", the control unit 62 makes the temperature of the electrode 30 a second temperature lower than the first temperature. In addition, the energization of the heater 60 is controlled. When the user operates the temperature changeover switch 16 to switch the temperature of the electrode 30 to "OFF", the control unit 62 stops the energization of the heater 60 so that the electrode 30 is not heated by the heater 60.

The control unit 62 may control the energization of the heater 60 based on the detection result of the first temperature sensor 48 or the second temperature sensor 50. Specifically, the control unit 62 may control the energization of the heater 60 so that the temperature of the electrode 30 is higher (or lower) than the temperature of the skin surface. In this way, the control unit 62 adjusts the temperature of the electrode 30 according to the temperature of the skin surface, so that the user can bring the electrode 30 into contact with the skin surface at a comfortable temperature during shaving or skin care. Can be done. In addition, an appropriate temperature difference between the skin surface and the electrode 30 can be maintained, and the skin surface can be cared for at an appropriate temperature regardless of the timing or place where the electric razor 2 is used.

Further, the control unit 62 may control the heater 60 so that the temperature of the electrode 30 differs between the first mode and the second mode. Specifically, the control unit 62 may control the heater 60 so that the temperature of the electrode 30 in the first mode is higher than the temperature of the electrode 30 in the second mode, for example. As a result, even if the appropriate temperature of the electrode 30 in each of the first mode and the second mode is different, the user can use the electrode at a comfortable temperature in both the first mode and the second mode. 30 can be brought into contact with the skin surface.

[4. How to use an electric razor]
[4-1. How to use in the first mode]
Next, a method of using the electric razor 2 according to the embodiment will be described with reference to FIG. 14A. FIG. 14A is a diagram for explaining how to use the electric razor 2 according to the embodiment in the first mode.

When the user operates the power switch 12 to turn on the power of the electric razor 2, the control unit 62 switches to the first mode in which shaving and skin care are performed at the same time.

As shown in FIG. 14A, the user grips the grip portion 8 by hand so that the blade surface 20 of the blade head 6 and the first electrode surface 42a of the first electrode portion 42 of the electrode 30 are on the skin surface. Make contact at the same time. As a result, shaving is performed to shave the hair on the skin surface in contact with the blade surface 20, and at the same time, care is performed on the skin surface in which a weak current of, for example, about several μA is supplied from the first electrode portion 42 to the skin surface.

When the user grips the grip portion 8 by hand and presses the blade head 6 against the skin surface, the roller 26 receives the force of pressing the blade head 6 against the skin surface most. As a result, the rotating roller 26 reduces the frictional resistance, so that the blade surface 20 and the first electrode surface 42a can be moved on the skin surface so as to slide with less friction while firmly pressing against the skin surface. can. As a result, shaving and skin care can be performed at the same time while suppressing the burden on the skin surface.

By performing shaving and skin care at the same time in this way, the wounded skin tissue is repaired by a weak electric current, and the barrier function of the stratum corneum of the skin can be repaired and promoted, especially when the skin is rough. can. As a result, the condition of the skin surface after shaving can be made moist and smooth, and the condition of the skin surface can be improved. Further, since a weak electric current is supplied to the skin surface, the electrical stimulus given to the user is also weak, and the user is not electrically hurt. Further, since the electrode 30 is not in electrical contact with the outer blade 24 of the blade head 6, the outer blade 24 is electrically oxidized and corroded even when the outer blade 24 is made of metal. In particular, it is possible to prevent the sharp portion of the metal blade surface 20 from being electrolytically corroded and causing blade spillage.

Further, when the user grips the grip portion 8 by hand, the user's palm or finger comes into contact with the counter electrode portion 18 arranged in the grip portion 8. As a result, when the first electrode surface 42a is brought into contact with the skin surface to be shaving, a closed circuit is formed between the electrode 30 and the counter electrode portion 18 via the user's human body. As a result, a weak current easily flows through the human body of the user, and a voltage having the same potential is always applied to the skin surface to be shaving. Further, since the user's palm or finger comes into contact with the counter electrode portion 18 simply by grasping the grip portion 8 by hand, the grip portion 8 to be gripped can be used to enhance a weak electrical stimulation effect. ..

Further, when a DC voltage is applied to the electrode 30, by using the electrode 30 as a cathode and the counter electrode portion 18 as an anode, a negative potential can be given to the skin surface to be shaving. As a result, the skin surface can be maintained in a normal electric potential state, and the skin surface can be effectively cared for.

[4-2. How to use in the second mode]
Next, a method of using the electric razor 2 according to the embodiment will be described with reference to FIG. 14B. FIG. 14B is a diagram for explaining how to use the electric razor 2 according to the embodiment in the second mode.

The user operates the current changeover switch 14 to switch the weak current supplied from the electrode 30 to the skin surface to "strong" or "weak". As a result, the control unit 62 switches to the second mode in which only the skin surface is cared for.

As shown in FIG. 14B, the user grips the grip portion 8 by hand and brings the second electrode surface 44a of the second electrode portion 44 of the electrode 30 into contact with the skin surface. At this time, the blade surface 20 does not come into contact with the skin surface. As a result, shaving is not performed, and only skin care is performed in which a weak current of, for example, about several μA is supplied from the second electrode portion 44 to the skin surface. Since the control unit 62 stops driving the inner blade driver 40, it is possible to suppress unnecessary consumption of the secondary battery built in the electric razor 2.

[5. effect]
As described above, in the present embodiment, the electric razor 2 cooperates with the outer blade 24 on the skin surface by reciprocating linearly with respect to the outer blade 24 in contact with the skin surface and the outer blade 24. It includes an inner blade 28 for cutting body hair and an electrode 30 that comes into contact with the skin surface and supplies a weak current to the skin surface. The electrode 30 is arranged in a direction intersecting the first electrode portion 42 on which the first electrode surface 42a arranged side by side with the outer blade 24 is formed, and the first electrode surface 42a to the first electrode surface 42a. It has a second electrode portion 44 on which a second electrode surface 44a hanging along the surface is formed.

According to this, when the user wants to perform shaving and skin care at the same time, for example, the outer blade 24 and the first electrode surface 42a are brought into contact with the skin surface at the same time. Further, for example, when the user wants to care only for the skin surface, the user brings only the second electrode surface 44a into contact with the skin surface without contacting the outer blade 24 with the skin surface. As a result, when the user wants to perform only the skin surface care, the skin surface care can be effectively performed while suppressing the damage to the skin surface by the outer blade 24.

Further, in the present embodiment, the boundary portion 46 between the first electrode surface 42a and the second electrode surface 44a is formed in a rounded shape.

According to this, for example, when the outer blade 24 and the first electrode surface 42a are brought into contact with the skin surface at the same time, or when only the second electrode surface 44a is brought into contact with the skin surface, the first with respect to the skin surface is obtained. It is possible to secure a large contact area between the electrode surface 42a or the second electrode surface 44a.

Further, in the present embodiment, the outer blade 24 is formed in a long shape along a predetermined direction and in a rounded shape along a predetermined direction. The first electrode surface 42a is arranged side by side with the outer blade 24 in a direction perpendicular to a predetermined direction (including substantially vertical), and has a radius-shaped curvature of the outer blade 24 along the predetermined direction. It is formed in a rounded shape with the same (including substantially the same) curvature as the above.

According to this, for example, when the outer blade 24 and the first electrode surface 42a are brought into contact with the skin surface at the same time, the outer blade 24 and the first electrode surface 42a are pressed against the skin surface with substantially the same pressure. Can be done. As a result, it is possible to prevent only the outer blade 24 from being strongly pressed against the skin surface, so that the skin surface can be gently cared for. Further, since it is possible to avoid that only the first electrode surface 42a is strongly pressed against the skin surface, the outer blade 24 can be firmly adhered to the skin surface, and shaving can be effectively performed. ..

Further, in the present embodiment, when the outer blade 24 is viewed in a plan view, the second electrode surface 44a is formed in a rounded shape.

According to this, for example, when only the second electrode surface 44a is brought into contact with the skin surface, the second electrode surface 44a can be efficiently fitted to the recessed surface of the face.

Further, in the present embodiment, the electric razor 2 is further arranged between the outer blade 24 and the first electrode portion 42, and protrudes toward the skin surface side from the outer blade 24 and the first electrode portion 42. A roller 26 is provided.

According to this, when the user presses the outer blade 24 and the first electrode surface 42a against the skin surface at the same time, the roller 26 exerts the most force to press the outer blade 24 and the first electrode surface 42a against the skin surface. You will receive a lot. As a result, the rotating roller 26 reduces the frictional resistance, so that the outer blade 24 and the first electrode surface 42a can be moved on the skin surface so as to slide with less friction while firmly pressing the outer blade 24 and the first electrode surface 42a against the skin surface. .. As a result, shaving and skin care can be performed at the same time while suppressing the burden on the skin surface.

Further, in the present embodiment, the electric razor 2 further drives a drive unit 56 that causes the inner blade 28 to reciprocate linearly with respect to the outer blade 24, and drives the drive unit 56 and applies a weak current from the electrode 30 to the skin surface. It includes a first mode for supplying and a control unit 62 for stopping the driving of the driving unit 56 and controlling to switch from one of the second modes for supplying a weak current from the electrode 30 to the skin surface to the other.

According to this, since the same electrode 30 is used in the two modes, the electric razor 2 can be made compact, and the electrode 30 can be easily applied to the target portion on the skin surface.

Further, in the present embodiment, the control unit 62 controls the temperature of the electrode 30 according to the temperature of the skin surface.

According to this, the user can bring the electrode 30 into contact with the skin surface at a comfortable temperature during shaving or skin care.

Further, in the present embodiment, the control unit 62 controls the temperature of the electrode 30 to be different between the first mode and the second mode.

According to this, even if the appropriate temperature of the electrode 30 in each of the first mode and the second mode is different, the user can enjoy a comfortable temperature in both the first mode and the second mode. The electrode 30 can be brought into contact with the skin surface.

Further, in the present embodiment, the electric razor 2 further includes a first temperature sensor 48 (second temperature sensor 50) that detects the temperature of the skin surface in contact with the electrode 30. The control unit 62 controls the electrode 30 or the drive unit 56 based on the detection result of the first temperature sensor 48 (second temperature sensor 50).

According to this, the electrode 30 or the driving unit 56 can be appropriately controlled according to the temperature of the skin surface.

Further, in the present embodiment, the control unit 62 controls the amplitude of the inner blade 28 based on the detection result of the first temperature sensor 48 (second temperature sensor 50).

According to this, shaving can be appropriately performed according to the temperature of the skin surface.

Further, in the present embodiment, the control unit 62 controls the temperature of the electrode 30 based on the detection result of the first temperature sensor 48 (second temperature sensor 50).

According to this, it is possible to appropriately care for the skin surface according to the temperature of the skin surface.

Further, in the present embodiment, in the electric razor 2, the blade head 6 is provided with the outer blade 24 and the electrode 30, and the electrode 30 has the first electrode surface 42a arranged side by side with the outer blade 24 and the first electrode surface 42a. A second electrode surface 44a that hangs down from the electrode surface 42a to the front side of the blade head 6 is formed.

Further, the control unit 62 includes, for example, a microcontroller having one or more processors and one or more memories. The microcontroller realizes a function as a control unit 62 by executing a program recorded in one or more memories with one or more processors. The program may be pre-recorded in memory, provided by being recorded on a non-temporary recording medium such as a memory card, or provided through a telecommunication line. In other words, the above program is a program for causing one or more processors to function as the control unit 62.

(Other variants)
As described above, embodiments have been described as an example of the techniques disclosed in this application. However, the technique in the present disclosure is not limited to this, and can be applied to embodiments in which changes, replacements, additions, omissions, etc. are made as appropriate. It is also possible to combine the components described in the above embodiment to form a new embodiment.

In the above embodiment, the second electrode portion 44 is arranged in front of the blade head 6, but the present invention is not limited to this, and the back surface of the blade head 6 (from the top surface of the blade head 6 to the back surface 8b side of the grip portion 8). It may be placed on a hanging surface). In this case, the second electrode surface 44a is arranged so as to hang down from the first electrode surface 42a on the back surface side of the blade head 6.

The present disclosure is applicable to, for example, an electric razor having both a shaving function and a skin care function.

2 Electric razor 4 razor body 6 Blade head 8 Grip part 8a Front side 8b Back side 10 Connection part 12 Power switch 14 Current changeover switch 16 Temperature changeover switch 18 Counter electrode electrode part 20 Blade surface 22 Blade frame 24 Outer blade 24a First net outer blade 24b Slit blade 24c Second net outer blade 26 Roller 28 Inner blade 28a First inner blade 28b Slit inner blade 28c Second inner blade 30 Electrode 32 Frame 34 Outer blade cassette 36 Blade hole 38 Flat surface 40 Inner blade driver 42 First electrode portion 42a First electrode surface 44 Second electrode portion 44a Second electrode surface 46 Boundary portion 48 First temperature sensor 50 Second temperature sensor 52 Temperature detection block 54 Insulation sheet 56 Drive unit 58 Voltage supply unit 60 Heater 62 Control unit

Claims

The outer blade that comes into contact with the skin surface
An inner blade that cuts hair on the skin surface in cooperation with the outer blade by making a reciprocating linear motion with respect to the outer blade.
An electrode that comes into contact with the skin surface and supplies a weak electric current to the skin surface is provided.
The electrode is
A first electrode portion on which a first electrode surface arranged side by side with the outer blade is formed, and a first electrode portion.
An electric razor having a second electrode portion formed with a second electrode surface hanging from the first electrode surface along a direction intersecting the first electrode surface.
The electric razor according to claim 1, wherein the boundary portion between the first electrode surface and the second electrode surface is formed in a rounded shape.
The outer blade is formed in an elongated shape along a predetermined direction, and is formed in a rounded shape along the predetermined direction.
The first electrode surface is arranged side by side in a direction perpendicular to the outer blade and the predetermined direction, and has the same curvature as the radius shape of the outer blade along the predetermined direction. The electric razor according to claim 1 or 2, which is formed in the R shape of the above.
The electric razor according to any one of claims 1 to 3, wherein the second electrode surface is formed in a rounded shape when the outer blade is viewed in a plan view.
Claims 1 to 4 further include the electric razor, which is arranged between the outer blade and the first electrode portion, and includes a roller that projects toward the skin surface side of the outer blade and the first electrode portion. The electric razor according to any one of the above.
The electric razor further
A drive unit that causes the inner blade to reciprocate linearly with respect to the outer blade,
A first mode for driving the drive unit and supplying a weak current from the electrode to the skin surface, and a second mode for stopping the drive of the drive unit and supplying a weak current from the electrode to the skin surface. The electric razor according to any one of claims 1 to 5, further comprising a control unit that controls switching from one mode to the other.
The electric razor according to claim 6, wherein the control unit controls the temperature of the electrodes according to the temperature of the skin surface.
The electric razor according to claim 6 or 7, wherein the control unit controls the temperature of the electrode to be different between the first mode and the second mode.
The electric razor further comprises a temperature sensor that detects the temperature of the skin surface in contact with the electrodes.
The electric razor according to any one of claims 6 to 8, wherein the control unit controls the electrode or the drive unit based on the detection result of the temperature sensor.
The electric razor according to claim 9, wherein the control unit controls the amplitude of the inner blade based on the detection result of the temperature sensor.
The electric razor according to claim 9, wherein the control unit controls the temperature of the electrode based on the detection result of the temperature sensor.
An outer blade and an electrode are provided on the blade head, and the first electrode surface arranged side by side with the outer blade and the first electrode surface hang down from the first electrode surface to the front side or the back side of the blade head. An electric razor formed with an extending second electrode surface.
The electric razor according to claim 12, wherein the boundary portion between the first electrode surface and the second electrode surface is formed in a rounded shape.
The outer blade is formed in an elongated shape along a predetermined direction, and is formed in a rounded shape along the predetermined direction.
The first electrode surface is arranged side by side in a direction perpendicular to the outer blade and the predetermined direction, and has the same curvature as the radius shape of the outer blade along the predetermined direction. The electric razor according to claim 12 or 13, which is formed in the R shape of the above.
The electric razor according to any one of claims 12 to 14, wherein the second electrode surface is formed in a rounded shape when the outer blade is viewed in a plan view.