Electric razor

Abstract

To provide an electric razor which can effectively care a skin surface while suppressing damage onto the skin surface by an outer blade.SOLUTION: An electric razor 2 comprises: an outer blade 24 contacting a skin surface; an inner blade 28 which linearly reciprocates with respect to the outer blade 24, thereby cutting hairs on the skin surface in cooperation with the outer blade 24; and an electrode 30 which contacts the skin surface, and supplies a weak current to the skin surface. The electrode 30 has: a first electrode part 42 in which a first electrode plane 42a, that is arranged side by side with the outer blade 24, is formed; and a second electrode part 44 in which a second electrode plane 44a, that hangs down from the first electrode plane 42a along a direction crossing the first electrode plane 42a, is formed.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an electric shaver. [Background technology]

[0002] There is known an electric shaver that combines a shaving function for shaving body hair with a skin care function for caring for the skin surface (see, for example, Patent Document 1). The blade head of this type of electric shaver includes an outer blade, an inner blade that moves linearly back and forth relative to the outer blade, and an electrode unit for supplying a weak current to the skin surface. The outer blade includes a pair of net outer blades and a slit blade disposed between the pair of net outer blades. The electrode unit is disposed between one of the pair of net outer blades and the slit blade.

[0003] With the outer blade in contact with the skin surface, the inner blade moves back and forth in a straight line relative to the outer blade, so that the hair inserted in the blade hole of the outer blade is pinched and cut by the inner and outer blades. Also, with the electrode part in contact with the skin surface, a weak current is supplied from the electrode part to the skin surface, so that the skin surface can be cared for. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2006-343322 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the conventional electric razors described above, even when a user only wants to care for the skin surface, the outer blade and the electrode part come into contact with the skin surface at the same time, which creates the problem that the skin surface may be damaged by the outer blade.

[0006] The present invention has been made in consideration of these problems, and has an object to provide an electric shaver that can effectively care for the skin surface while suppressing damage to the skin surface caused by the outer blade. [Means for solving the problem]

[0007] In order to solve the above problems, an electric razor according to one embodiment of the present invention comprises an outer blade that contacts the skin surface, an inner blade that cooperates with the outer blade to cut hair on the skin surface by making a reciprocating linear motion relative to the outer blade, and an electrode that contacts the skin surface to supply a weak current to the skin surface, the electrode having a first electrode portion having a first electrode surface arranged alongside the outer blade, and a second electrode portion having a second electrode surface that hangs down from the first electrode surface in a direction intersecting the first electrode surface. Effect of the Invention

[0008] According to the electric shaver of one aspect of the present invention, it is possible to effectively care for the skin surface while suppressing damage to the skin surface caused by the outer blade. [Brief description of the drawings]

[0009] [Figure 1A] 1 is a perspective view showing an electric shaver according to an embodiment. [Figure 1B] 1 is a front view showing an electric shaver according to an embodiment. [Figure 1C] FIG. 1 is a side view showing an electric shaver according to an embodiment. [Figure 1D] FIG. 2 is a rear view showing the electric shaver according to the embodiment. [Diagram 2] FIG. 2 is a perspective view showing a blade head according to the embodiment. [Diagram 3] FIG. 2 is a front view showing a blade head according to the embodiment. [Figure 4] FIG. 2 is a top view showing a blade head according to the embodiment. [Diagram 5] FIG. 2 is a side view showing a blade head according to the embodiment. [Figure 6]6 is a cross-sectional view of a main part of a blade head according to the embodiment taken along line VI-VI in FIG. 4. [Figure 7A] 13 is a rear view showing the blade head according to the embodiment with the outer blade cassette removed. FIG. [Figure 7B] 11 is a top view showing the blade head according to the embodiment with the outer blade cassette removed. FIG. [Figure 8A] 5A and 5B are diagrams for explaining the arrangement of a first temperature sensor and a second temperature sensor in a blade head according to an embodiment. [Figure 8B] FIG. 2 is a perspective view showing a first temperature sensor according to the embodiment. [Figure 9] 1 is a block diagram showing a functional configuration of an electric razor according to an embodiment. [Figure 10] 5A to 5C are diagrams showing examples of application patterns of voltages applied to electrodes of the electric razor according to the embodiment. [Figure 11] 5A to 5C are diagrams showing examples of application patterns of voltages applied to electrodes of the electric razor according to the embodiment. [Figure 12] 5A to 5C are diagrams showing examples of application patterns of voltages applied to electrodes of the electric razor according to the embodiment. [Figure 13] 5A to 5C are diagrams showing examples of application patterns of voltages applied to electrodes of the electric razor according to the embodiment. [Figure 14A] FIG. 2 is a diagram illustrating how to use the electric razor in the first mode according to the embodiment. [Figure 14B] FIG. 11 is a diagram illustrating how to use the electric razor in the second mode according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the embodiment will be specifically described with reference to the drawings.

[0011] The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, component arrangement and connection forms, steps, and order of steps shown in the following embodiments are merely examples and are not intended to limit the present invention. Furthermore, among the components in the following embodiments, components that are not described in an independent claim showing a top concept are described as optional components.

[0012] In addition, each drawing is a schematic diagram and is not necessarily a precise illustration. In each drawing, the same reference numerals are used for substantially the same configurations, and duplicated explanations are omitted or simplified.

[0013] (Embodiment) [1. Overall structure of an electric shaver] First, the overall structure of an electric shaver 2 according to an embodiment will be described with reference to Fig. 1A to Fig. 1D. Fig. 1A is a perspective view showing an electric shaver 2 according to an embodiment. Fig. 1B is a front view showing an electric shaver 2 according to an embodiment. Fig. 1C is a side view showing an electric shaver 2 according to an embodiment. Fig. 1D is a rear view showing an electric shaver 2 according to an embodiment.

[0014] 1A to 1D, the left-right direction of the electric razor 2 is the X-axis direction, the front-rear direction of the electric razor 2 is the Y-axis direction, and the up-down direction of the electric razor 2 is the Z-axis direction.

[0015] The electric shaver 2 according to the embodiment is an electric shaver that combines a shaving function for shaving body hair (beard) growing 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 shaver 2 includes a razor body 4 and a blade head 6.

[0016] The razor body 4 has a grip portion 8 and a connecting portion 10. The grip portion 8 is formed in a generally cylindrical shape with a bottom, and is formed in an elongated shape along the up-down direction (Z-axis direction). The grip portion 8 is formed of, for example, resin. When using the electric razor 2, a user holds the grip portion 8 with his or her hand. Note that a secondary battery (not shown) for supplying power to each electronic component and the like is disposed inside the grip portion 8.

[0017] As shown in Figures 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 of the electric razor 2 on and off. The current changeover switch 14 is a switch for switching the weak current supplied to the skin surface from the electrodes 30 (described below) between, for example, three levels ("strong", "weak", and "off"). The temperature changeover switch 16 is a switch for switching the temperature of the electrodes 30 between, for example, three levels ("high", "low", and "off").

[0018] As shown in Fig. 1C and Fig. 1D, a counter electrode 18 made of, for example, metal is disposed on the back surface 8b of the grip portion 8. The counter electrode 18 is formed in an elongated shape along the longitudinal direction (Z-axis direction) of the grip portion 8. The counter electrode 18 is preferably disposed, shaped, and sized so that the palm or fingers of the user are surely in contact with the counter electrode 18 when the user holds the grip portion 8 with his / her hand. The material of the counter electrode 18 is not limited to metal, and may be, for example, a conductive resin, or an insulating resin with a surface coated with metal plating.

[0019] The connecting part 10 is disposed at one end in the longitudinal direction of the grip part 8. The connecting part 10 connects the blade head 6 to the grip part 8 so as to be swingable in the front-rear direction (Y-axis direction) or the left-right direction (X-axis direction) or both.

[0020] The blade head 6 has a blade surface 20 for shaving body hair growing on the skin surface while in contact with the skin surface. The blade head 6 also swings in the front-back direction or the left-right direction or both directions relative to the razor body 4. This allows the blade surface 20 to conform to the shape of the skin surface and come into close contact with the skin surface when the user holds the grip portion 8 with his / her hand and moves the blade head 6 over the skin surface while pressing the blade surface 20 against the skin surface.

[0021] [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 the main part of the blade head 6 according to the embodiment taken along line VI-VI in Fig. 4. 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 view 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.

[0022] As shown in FIGS. 2 to 5, the blade head 6 includes a blade frame 22, an outer blade 24, a roller 26, an inner blade 28, and an electrode 30. The blade frame 22 includes an outer blade 24, an outer blade 24, a roller 26, an inner blade 28, and an electrode 30.

[0023] The blade frame 22 has a frame body 32 and an outer blade cassette 34. The frame body 32 is connected to one end in the longitudinal direction of the grip part 8 via a connecting part 10 so as to be swingable in the front-rear direction or the left-right direction or both. The outer blade cassette 34 is attached to the frame body 32 so as to be detachable.

[0024] 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 in this order in the front-rear direction. The first net outer blade 24a, the slit blade 24b, and the second net outer blade 24c define the blade surface 20 described above. 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. In the present embodiment, the outer blade 24 has three outer blades, but is not limited to this, and the outer blade 24 may have any number of outer blades.

[0025] As shown in Fig. 2 and Fig. 4, each of the first net outer blade 24a and the second net outer blade 24c is formed in an elongated shape along the left-right direction (X-axis direction) (one example of a predetermined direction) and is arranged approximately parallel to each other. In the XZ front view shown in Fig. 3, each of the first net outer blade 24a and the second net outer blade 24c is formed in an arc shape curved along the longitudinal direction (X-axis direction) so as to be convex upward (positive side of the Z axis). In addition, 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 formed in an inverted U-shape curved along the short side direction (Y-axis direction) so as to be convex upward. Each of the first net outer blade 24a and the second net outer blade 24c has a plurality of blade holes (not shown) formed therein.

[0026] As shown in Fig. 2 and Fig. 4, the slit blade 24b is formed in an elongated shape along the left-right direction and is disposed approximately parallel to each of the first net outer blade 24a and the second net outer blade 24c. In the YZ side view shown in Fig. 5, the slit blade 24b is formed in an approximately inverted U-shape along the short side direction (Y-axis direction). That is, the upper surface of the slit blade 24b (the surface that defines the blade surface 20) is formed as a flat surface. The slit blade 24b has a plurality of slit-shaped blade holes 36 (see Fig. 4).

[0027] As shown in Fig. 2 and Fig. 4, the roller 26 is rotatably supported by the outer blade cassette 34. The roller 26 is formed long in the left-right direction and is disposed between the first net outer blade 24a and a first electrode portion 42 (described later) of the electrode 30. As shown in Fig. 6, the roller 26 protrudes toward the skin surface side (the positive side of the Z axis) beyond the blade surface 20 of the outer blade 24 and the first electrode surface 42a (described later) of the first electrode portion 42. That is, the roller 26 protrudes toward the skin surface side beyond a plane 38 (indicated by a dashed line in Fig. 6) including the blade surface 20 and the first electrode surface 42a.

[0028] As shown in Fig. 7A, the inner blade 28 is supported by the frame 32 via the inner blade driver 40, and is disposed between the outer blade 24 and the frame 32. As shown in Fig. 7B, the inner blade 28 has three inner blades, namely, 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 disposed opposite the first net outer blade 24a, the slit blade 24b, and the second net outer blade 24c, respectively.

[0029] As the inner blade driver 40 is driven, the first inner blade 28a, the slit inner blade 28b, and the second inner blade 28c move linearly back and forth at a predetermined amplitude in the left and right direction relative to the first net outer blade 24a, the slit blade 24b, and the second net outer blade 24c, respectively. As a result, the hair inserted into each blade hole of the first net outer blade 24a and the second net outer blade 24c and the blade hole 36 of the slit blade 24b is cut by pinching through the cooperation of the first net outer blade 24a, the slit blade 24b, and the second net outer blade 24c with the first inner blade 28a, the slit inner blade 28b, and the second inner blade 28c.

[0030] The electrode 30 is for caring for the skin surface by supplying a weak current to the skin surface while 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 as a plate having a substantially inverted J shape as a whole when viewed in a YZ cross section. The material of the electrode 30 is not limited to metal, and may be, for example, a conductive resin, or an insulating resin with a metal plating coated on its surface.

[0031] 2 to 5, the first electrode portion 42 is disposed on the top surface (the surface on which the blade surface 20 is disposed) of the blade head 6. A first electrode surface 42a is formed on the outer surface of the first electrode portion 42. The first electrode surface 42a is disposed side by side with the blade surface 20 in the front-rear direction (a direction substantially perpendicular to the left-right direction).

[0032] As shown in FIG. 3, the first electrode surface 42a is formed in an arc shape that curves along the left-right direction so as to be convex upward. At this time, the curvature of the arc shape of the first electrode surface 42a is approximately the same as the curvature of each of the arc shapes of the first net outer blade 24a and the second net outer blade 24c. As a result, in the first mode described later, when the blade surface 20 and the first electrode surface 42a are simultaneously brought into contact with the skin surface, the blade surface 20 and the first electrode surface 42a can be pressed against the skin surface with approximately the same pressure. 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 cared for gently. In addition, it is also possible to prevent only the first electrode surface 42a from being strongly pressed against the skin surface, so that the blade surface 20 can be firmly attached to the skin surface, and shaving can be effectively performed.

[0033] As shown in Figs. 2 to 5, the second electrode portion 44 is disposed on the front surface of the blade head 6 (a surface that hangs down from the top surface of the blade head 6 toward the front surface 8a 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 in a direction intersecting with the first electrode surface 42a (the negative side of the Z axis). The second electrode surface 44a has a larger area than the first electrode surface 42a.

[0034] 4, when the blade surface 20 is viewed in the XY plane, the second electrode surface 44a is formed in an arc shape that curves along the left-right direction so as to be convex toward the front (the negative side of the Y axis). This allows the second electrode surface 44a to efficiently fit, for example, a concave surface of the face when the second electrode surface 44a is brought into contact with the skin surface in the second mode described below.

[0035] 5 and 6, the boundary 46 between the first electrode surface 42a and the second electrode surface 44a is formed in a rounded shape. This ensures a large contact area between the first electrode surface 42a or the second electrode surface 44a and the skin surface when the blade surface 20 and the first electrode surface 42a are simultaneously brought into contact with the skin surface in a first mode described below, and when the second electrode surface 44a is brought into contact with the skin surface in a second mode described below.

[0036] 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 (a) and (b) of FIG. 8B, the first temperature sensor 48 has 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 a control unit 62 (described later). The heat insulating sheet 54 is disposed so as to cover the surface of the temperature detection block 52, and blocks the transfer of heat from the first electrode unit 42 to the temperature detection block 52. The configuration of the second temperature sensor 50 is the same as that of the first temperature sensor 48, and therefore a description thereof will be omitted.

[0037] [3. Functional configuration of electric shaver] Next, the functional configuration of the electric razor 2 according to the embodiment will be described with reference to Fig. 9 to Fig. 13. Fig. 9 is a block diagram showing the 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 voltage applied to the electrodes 30 of the electric razor 2 according to the embodiment.

[0038] As shown in FIG. 9, the electric shaver 2 includes, as its functional components, 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.

[0039] 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.

[0040] The drive unit 56 is a motor for driving the inner blade driver 40. Although not shown in Figures 1A to 1D, the drive unit 56 is disposed inside the razor body 4, for example.

[0041] 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 disposed, for example, inside the razor 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. Note that a bioelectric current of 100 to 200 µA flows in 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 through the human body from outside the body.

[0042] The voltage supply unit 58 can apply a) a DC voltage of a constant voltage value L1 as shown in FIG. 10, b) a DC voltage of a square wave L2 as shown in FIG. 11, c) an AC voltage of a sine wave L3 as shown in FIG. 12, or d) an AC voltage of a square wave L4 as shown in FIG. 13, as the predetermined voltage to be applied to the electrode 30. Although not shown, the voltage supply unit 58 may apply an AC voltage such as a triangular wave as the predetermined voltage to be applied to the electrode 30. In the example shown in FIG. 10, it is preferable that the voltage supply unit 58 applies a DC voltage of a constant voltage value V1 in the range of 0.01 to 20 V to the electrode 30 in order to activate the skin tissue on the skin surface. If the constant voltage value L1 is lower than 0.01 V, the skin surface cannot be maintained in a normal potential state. On the other hand, if the constant voltage value L1 exceeds 20 V, an excessive current flows on the skin surface, and cells on the skin surface may be killed by electrolysis.

[0043] The predetermined voltage applied by the voltage supply unit 58 may be any type of voltage, such as a constant voltage, a pulse voltage, or a voltage whose value varies periodically. For example, when the predetermined voltage is a DC voltage and the voltage value varies, such as a pulse voltage (60 Hz to 1 MHz), the average voltage value or the peak voltage value is preferably within the above-mentioned range of 0.01 to 20 V. When constant current control is performed, the average voltage value of the predetermined voltage is preferably within the above-mentioned 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 within the above-mentioned range of 0.01 to 20 V. Here, when the predetermined voltage is an AC voltage, even if the voltage value is relatively low, a weak current can be supplied to the skin surface, and even if the voltage value is relatively high, the electrical pain given to the user can be reduced by increasing the frequency.

[0044] In this embodiment, the voltage supply unit 58 performs constant voltage control, but the present invention is not limited to this, and constant current control may be performed. In this case, since the voltage value varies depending on the conditions, it is preferable that the average voltage value or the peak voltage value is within the range of 0.01 to 20 V.

[0045] The heater 60 is a heat source for heating the electrode 30. Although not shown in Fig. 1A to Fig. 1D, the heater 60 is disposed inside the blade head 6, for example.

[0046] The control unit 62 controls the drive unit 56 based on the user's operation of the power switch 12. Specifically, when the user operates the power switch 12 to turn on the electric shaver 2, the control unit 62 controls the drive unit 56 to drive the inner blade driver 40. When the user operates the power switch 12 to turn off the electric shaver 2, the control unit 62 controls the drive unit 56 to stop driving the inner blade driver 40.

[0047] The control unit 62 may control the driving 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, the control unit 62 determines that inflammation is occurring on the skin surface and controls the driving unit 56 to reduce the amplitude of the inner blade 28. This makes it 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 lower than the threshold, the control unit 62 determines that the condition of the skin surface is good and controls the driving unit 56 to increase the amplitude of the inner blade 28. This makes it possible to shave body hair closely during shaving.

[0048] The control unit 62 also controls the voltage supply unit 58 based on the user's operation of the current switch 14. Specifically, when the user operates the current switch 14 to switch the weak current supplied from the electrode 30 to the skin surface to "strong", the control unit 62 controls the voltage supply unit 58 so that the weak current supplied from the electrode 30 to the skin surface is a first current value. When the user operates the current switch 14 to switch the weak current supplied from the electrode 30 to the skin surface to "weak", the control unit 62 controls the voltage supply unit 58 so that the weak current supplied from the electrode 30 to the skin surface is a second current value smaller than the first current value. When the user operates the current switch 14 to switch the weak current supplied from the electrode 30 to the skin surface to "off", the control unit 62 controls the voltage supply unit 58 so that the supply of the weak current from the electrode 30 to the skin surface is stopped.

[0049] The control unit 62 also controls the drive unit 56 and the voltage supply unit 58 to switch between a first mode in which shaving and skin surface care are performed simultaneously, and a second mode in which only skin surface care is performed, to the other. In the first mode, the control unit 62 controls the drive unit 56 to drive the inner blade actuator 40, and controls the voltage supply unit 58 to supply a weak current to the skin surface from the electrode 30. In the second mode, the control unit 62 controls the drive unit 56 to stop driving the inner blade actuator 40, and controls the voltage supply unit 58 to supply a weak current to the skin surface from the electrode 30.

[0050] The control unit 62 also controls the energization of the heater 60 based on the user's operation of the temperature selector switch 16. Specifically, when the user operates the temperature selector switch 16 to switch the temperature of the electrode 30 to "high", the control unit 62 controls the energization of the heater 60 so that the temperature of the electrode 30 becomes a first temperature. When the user operates the temperature selector switch 16 to switch the temperature of the electrode 30 to "low", the control unit 62 controls the energization of the heater 60 so that the temperature of the electrode 30 becomes a second temperature lower than the first temperature. When the user operates the temperature selector 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.

[0051] 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 when shaving or caring for the skin surface. 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 of using the electric shaver 2.

[0052] Furthermore, the control unit 62 may control the heater 60 so as to make the temperature of the electrode 30 different between the first mode and the second mode. Specifically, the control unit 62 may control the heater 60 so as to make the temperature of the electrode 30 in the first mode higher than the temperature of the electrode 30 in the second mode, for example. This allows the user to bring the electrode 30 into contact with the skin surface at a comfortable temperature in both the first mode and the second mode, even if the appropriate temperature of the electrode 30 in each of the first mode and the second mode is different.

[0053] [4. How to use an electric razor] [4-1. How to use in the first mode] Next, a method of using the electric shaver 2 according to the embodiment will be described with reference to Fig. 14A. Fig. 14A is a diagram for explaining a method of using the electric shaver 2 according to the embodiment in the first mode.

[0054] When the user operates the power switch 12 to turn on the electric shaver 2, the control unit 62 switches to a first mode in which shaving and skin care are performed simultaneously.

[0055] 14A, the user holds the grip portion 8 with his / her hand and simultaneously brings 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 into contact with the skin surface. This allows shaving to be performed by shaving the body hair on the skin surface in contact with the blade surface 20, while at the same time providing care for the skin surface by supplying a weak current of, for example, about several μA from the first electrode portion 42 to the skin surface.

[0056] When the user holds the grip portion 8 by hand and presses the blade head 6 against the skin surface, the roller 26 receives the greatest force pressing the blade head 6 against the skin surface. This reduces frictional resistance of the rotating roller 26, so that the blade surface 20 and the first electrode surface 42a can be moved over the skin surface with little friction while being firmly pressed against the skin surface. As a result, shaving and skin care can be performed simultaneously while minimizing the burden on the skin surface.

[0057] In this way, by simultaneously performing shaving and skin care, the wounded skin tissue is repaired by the weak current, and the barrier function of the stratum corneum can be repaired and promoted, especially when the skin is rough. As a result, the skin surface after shaving can be made moist and smooth, improving the condition of the skin surface. In addition, since the weak current is supplied to the skin surface, the electrical stimulation given to the user is weak, and the user does not feel electrical pain. Furthermore, since the electrode 30 is not in electrical contact with the outer blade 24 of the blade head 6, even if the outer blade 24 is made of metal, the outer blade 24 will not be electrically oxidized and corroded, and it is possible to prevent the sharp part of the metallic blade surface 20 from being electrolytically corroded and chipping of the blade.

[0058] In addition, when the user holds the grip portion 8 with his / her hand, the user's palm or fingers come into contact with the counter electrode portion 18 arranged on the grip portion 8. As a result, when the first electrode surface 42a is brought into contact with the skin surface to be shaved, a closed circuit is formed between the electrode 30 and the counter electrode portion 18 via the user's body. As a result, a weak current flows easily through the user's body, and a voltage having the same potential is always applied to the skin surface to be shaved. In addition, since the user's palm or fingers come into contact with the counter electrode portion 18 simply by holding the grip portion 8 with his / her hand, the grip portion 8 to be held can be used to enhance the weak electrical stimulation effect.

[0059] Furthermore, when a DC voltage is applied to the electrode 30, a negative potential can be applied to the skin surface being shaved by making the electrode 30 a cathode and the counter electrode section 18 an anode. This allows the skin surface to be kept at a normal potential, allowing for effective skin care.

[0060] [4-2. How to use in the second mode] Next, a method of using the electric shaver 2 according to the embodiment will be described with reference to Fig. 14B. Fig. 14B is a diagram for explaining a method of using the electric shaver 2 according to the embodiment in the second mode.

[0061] The user operates the current selector switch 14 to switch the weak current supplied to the skin surface from the electrode 30 to "strong" or "weak." This causes the control unit 62 to switch to a second mode in which only skin surface care is performed.

[0062] As shown in FIG. 14B, the user holds the grip portion 8 with his / her 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 by supplying a weak current of, for example, about several μA from the second electrode portion 44 to the skin surface. In addition, the control portion 62 stops driving the inner blade actuator 40, so that unnecessary consumption of the secondary battery built into the electric shaver 2 can be suppressed.

[0063] [5. Effects] As described above, in this embodiment, the electric shaver 2 includes the outer blade 24 that contacts the skin surface, the inner blade 28 that cuts body hair on the skin surface in cooperation with the outer blade 24 by making a reciprocating linear motion relative to the outer blade 24, and the electrode 30 that contacts the skin surface to supply a weak current to the skin surface. The electrode 30 includes a first electrode portion 42 having a first electrode surface 42a disposed alongside the outer blade 24, and a second electrode portion 44 having a second electrode surface 44a that hangs down from the first electrode surface 42a in a direction intersecting with the first electrode surface 42a.

[0064] According to this, when the user wants to simultaneously shave and care for the skin surface, the user simultaneously contacts the outer blade 24 and the first electrode surface 42a to the skin surface. When the user wants to only care for the skin surface, the user does not contact the outer blade 24 to the skin surface, but only contacts the second electrode surface 44a to the skin surface. This allows the user to effectively care for the skin surface while suppressing damage to the skin surface by the outer blade 24 when the user only wants to care for the skin surface.

[0065] In this embodiment, the boundary 46 between the first electrode surface 42a and the second electrode surface 44a is formed in a rounded shape.

[0066] As a result, for example, when the outer blade 24 and the first electrode surface 42a are simultaneously brought into contact with the skin surface, or when only the second electrode surface 44a is brought into contact with the skin surface, a large contact area of ​​the first electrode surface 42a or the second electrode surface 44a with the skin surface can be ensured.

[0067] In the present embodiment, the outer cutter 24 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 42a is arranged in parallel with the outer cutter 24 in a direction substantially perpendicular to the predetermined direction and is formed in a rounded shape with substantially the same curvature as the rounded shape of the outer cutter 24 along the predetermined direction.

[0068] According to this, for example, when the outer blade 24 and the first electrode surface 42a are simultaneously brought into contact with the skin surface, the outer blade 24 and the first electrode surface 42a can be pressed against the skin surface with approximately the same pressure. As a result, it is possible to prevent only the outer blade 24 from being pressed strongly against the skin surface, so that the skin surface can be cared for gently. In addition, it is possible to prevent only the first electrode surface 42a from being pressed strongly against the skin surface, so that the outer blade 24 can be firmly attached to the skin surface, and shaving can be performed effectively.

[0069] In this embodiment, when the outer cutter 24 is viewed from above, the second electrode surface 44a is formed in a rounded shape.

[0070] 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 concave surface of the face.

[0071] In the present embodiment, the electric shaver 2 further includes a roller 26 that is disposed between the outer blade 24 and the first electrode portion 42 and protrudes toward the skin surface side beyond the outer blade 24 and the first electrode portion 42.

[0072] 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 receives the greatest force pressing the outer blade 24 and the first electrode surface 42a against the skin surface. This reduces the frictional resistance of the rotating roller 26, so that the outer blade 24 and the first electrode surface 42a can be moved on the skin surface with little friction while being firmly pressed against the skin surface. As a result, shaving and skin care can be performed at the same time while reducing the burden on the skin surface.

[0073] In addition, in this embodiment, the electric razor 2 further includes a drive unit 56 that causes the inner blade 28 to move back and forth in a linear manner relative to the outer blade 24, and a control unit 62 that controls the shaver to switch from one of a first mode in which the drive unit 56 is driven and a weak current is supplied to the skin surface from the electrode 30, and a second mode in which the drive unit 56 is stopped and a weak current is supplied to the skin surface from the electrode 30, to the other.

[0074] According to this, since the same electrode 30 is used in the two modes, the electric shaver 2 can be made compact, and the electrode 30 can be easily applied to a targeted location on the skin surface.

[0075] Furthermore, in this embodiment, control unit 62 controls the temperature of electrode 30 in accordance with the temperature of the skin surface.

[0076] This allows the user to bring the electrode 30 into contact with the skin surface at a comfortable temperature when shaving or caring for the skin surface.

[0077] In the present embodiment, the control unit 62 performs control so that the temperature of the electrode 30 differs between the first mode and the second mode.

[0078] As a result, even if the appropriate temperature of the electrode 30 differs between the first mode and the second mode, the user can contact the electrode 30 with the skin surface at a comfortable temperature in either the first mode or the second mode.

[0079] In the present embodiment, the electric shaver 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 driving unit 56 based on the detection result of the first temperature sensor 48 (second temperature sensor 50).

[0080] This allows the electrodes 30 or the driving unit 56 to be appropriately controlled according to the temperature of the skin surface.

[0081] 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).

[0082] This allows for appropriate shaving depending on the temperature of the skin surface.

[0083] 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).

[0084] This allows appropriate care of the skin surface according to the temperature of the skin surface.

[0085] Also, in this embodiment, the electric razor 2 has an outer cutter 24 and an electrode 30 provided on the blade head 6, and the electrode 30 is formed with a first electrode surface 42a arranged alongside the outer cutter 24, and a second electrode surface 44a extending downward from the first electrode surface 42a to the front side of the blade head 6.

[0086] According to this, when the user wants to simultaneously shave and care for the skin surface, the user simultaneously contacts the outer blade 24 and the first electrode surface 42a to the skin surface. When the user wants to only care for the skin surface, the user does not contact the outer blade 24 to the skin surface, but only contacts the second electrode surface 44a to the skin surface. This allows the user to effectively care for the skin surface while suppressing damage to the skin surface by the outer blade 24 when the user only wants to care for the skin surface.

[0087] In this embodiment, the boundary 46 between the first electrode surface 42a and the second electrode surface 44a is formed in a rounded shape.

[0088] As a result, for example, when the outer blade 24 and the first electrode surface 42a are simultaneously brought into contact with the skin surface, or when only the second electrode surface 44a is brought into contact with the skin surface, a large contact area of ​​the first electrode surface 42a or the second electrode surface 44a with the skin surface can be ensured.

[0089] In the present embodiment, the outer cutter 24 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 42a is arranged in parallel with the outer cutter 24 in a direction substantially perpendicular to the predetermined direction and is formed in a rounded shape with substantially the same curvature as the rounded shape of the outer cutter 24 along the predetermined direction.

[0090] According to this, for example, when the outer blade 24 and the first electrode surface 42a are simultaneously brought into contact with the skin surface, the outer blade 24 and the first electrode surface 42a can be pressed against the skin surface with approximately the same pressure. As a result, it is possible to prevent only the outer blade 24 from being pressed strongly against the skin surface, so that the skin surface can be cared for gently. In addition, it is possible to prevent only the first electrode surface 42a from being pressed strongly against the skin surface, so that the outer blade 24 can be firmly attached to the skin surface, and shaving can be performed effectively.

[0091] In this embodiment, when the outer cutter 24 is viewed from above, the second electrode surface 44a is formed in a rounded shape.

[0092] 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 concave surface of the face.

[0093] (Other variations) As described above, the embodiments have been described as examples of the technology disclosed in this application. However, the technology of the present invention is not limited to this, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are appropriately made. In addition, it is also possible to combine the components described in the above embodiments to create new embodiments.

[0094] In the above embodiment, the second electrode portion 44 is disposed on the front side of the blade head 6, but this is not limiting and the second electrode portion 44 may be disposed on the rear side of the blade head 6 (a surface hanging down from the top surface of the blade head 6 to the rear side 8b of the grip portion 8). In this case, the second electrode surface 44a is disposed hanging down from the first electrode surface 42a to the rear side of the blade head 6. [Industrial Applicability]

[0095] The present invention is applicable, for example, to an electric shaver that combines a shaving function with a skin care function. [Explanation of symbols]

[0096] 2. Electric razor 4 Razor body 6 blade head 8 Grip 8a front 8b Back 10 Connection part 12 Power Switch 14 Current changeover switch 16 Temperature switch 18 Counter electrode part 20 Blade surface 22 blade frame 24 Outer blade 24a First net outer blade 24b Slit blade 24c 2nd net outer blade 26 Laura 28 Inner blade 28a First inner blade 28b Slit inner blade 28c Second inner blade 30 electrodes 32 Frame 34 Outer blade cassette 36 Blade hole 38 plane 40 Inner blade driver 42 First electrode part 42a first electrode surface 44 Second electrode part 44a second electrode surface 46 Border 48 First Temperature Sensor 50 Second Temperature Sensor 52 Temperature detection block 54 Heat Insulation Sheet 56 Drive unit 58 Voltage supply section 60 Heater 62 Control section

Claims

1. An electric shaver to be held and used by a user, An outer blade that contacts the skin surface of the user; an inner blade that cuts body hair on the skin surface in cooperation with the outer blade by performing a reciprocating linear motion relative to the outer blade; a drive unit that causes the inner blade to perform a reciprocating linear motion relative to the outer blade; An electrode that contacts a skin surface to supply a weak current to the skin surface; a control unit that controls switching from one of a first mode in which the drive unit is driven and a weak current is supplied from the electrode to a skin surface, and a second mode in which the drive unit is stopped and a weak current is supplied from the electrode to a skin surface, The electrode is a first electrode portion having a first electrode surface disposed next to the outer cutter; a second electrode portion having a second electrode surface extending downward from the first electrode surface in a direction intersecting the first electrode surface; In the first mode, in order to simultaneously perform shaving and skin care, the electric shaver is held by the user so that the outer blade and the first electrode surface are in contact with the skin surface at the same time, and the second electrode surface is not in contact with the skin surface; In the second mode, in order to care for the skin surface without shaving, the user holds the electric shaver so that the second electrode surface is in contact with the skin surface and the outer blade and the first electrode surface are not in contact with the skin surface. Electric razor.

2. The boundary between the first electrode surface and the second electrode surface is formed in a rounded shape.

2. The electric shaver according to claim 1.

3. The outer blade is formed in an elongated shape along a predetermined direction and in a rounded shape along the predetermined direction, The first electrode surface is arranged in parallel with the outer cutter in a direction substantially perpendicular to the predetermined direction, and is formed in a curved shape having substantially the same curvature as the curved shape of the outer cutter along the predetermined direction.

3. The electric shaver according to claim 1 or 2.

4. When the outer cutter is viewed in plan, the second electrode surface is formed in a rounded shape. The electric shaver according to any one of claims 1 to 3.

5. The electric shaver further includes a roller disposed between the outer blade and the first electrode portion and protruding toward the skin surface side beyond the outer blade and the first electrode portion. The electric shaver according to any one of claims 1 to 4.

6. The electric shaver further includes a heater for heating the electrodes. The control unit controls the energization of the heater so as to make the temperature of the electrode different between the first mode and the second mode. The electric shaver according to any one of claims 1 to 5.

7. The electric shaver further includes a temperature sensor for detecting a temperature of a skin surface in contact with the electrodes. The control unit controls the electrodes or the drive unit based on a detection result of the temperature sensor. The electric shaver according to any one of claims 1 to 6.

8. The control unit controls the amplitude of the inner blade based on the detection result of the temperature sensor.

8. The electric shaver according to claim 7.

9. The control unit controls the temperature of the electrode based on a detection result of the temperature sensor.

8. The electric shaver according to claim 7.

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