Electric shaver

Abstract

The invention provides an electric shaver which can prevent residual shaving and can perform uniform deep shaving on the face and the peripheral part which are formed by complex shapes. A main body of the electric shaver is provided with: a rotary blade unit having a first outer blade and a first inner blade that rotates while being in sliding contact with the inner surface of the first outer blade; a reciprocating blade unit having a curved arc-shaped second outer blade and a second inner blade that reciprocates while being in sliding contact with the inner surface of the second outer blade; the reciprocating blade unit is arranged on the main body in a manner that the second outer blade can move up and down, and the rotary blade unit is arranged on the main body in a manner that the top of the second outer blade is positioned at any position. Each of the upper surfaces of the first outer blades is tiltable to a position parallel to a tangent plane where a farthest portion of the upper surfaces of the first outer blades, which is farthest from the second outer blade, and the upper surface of the second outer blade are tangent.

Description

Technical Field

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

[0002] Conventional electric shavers are broadly classified into two types: rotary electric shavers having a rotary blade unit and reciprocating electric shavers having a reciprocating blade unit (also sometimes referred to as a foil blade unit). Furthermore, electric shavers having both types of blade units have also been developed (see Patent Document 1: Japanese Patent Application Publication No. 2013-070749).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2013-070749 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] As exemplified in Patent Document 1, rotary electric shavers generally have the following characteristics: they are easy to shave long and curly beards, but difficult to achieve a deep shave. On the other hand, reciprocating electric shavers have the following characteristics: they are difficult to shave long and curly beards, but easy to achieve a deep shave. Therefore, the electric shaver exemplified in Patent Document 1 is an electric shaver that utilizes the advantages of both a rotary blade unit and a reciprocating blade unit.

[0008] However, the inventors have conducted in-depth research and have discovered the following problem: using only a rotary blade unit and a reciprocating blade unit does not allow for a thorough shaving of complex facial shapes and surrounding areas such as the jaw (to the neck) and under the nose. Specifically, this problem arises: shaving residue is generated, especially on long and curly beards, and a deep shave is not possible, resulting in an aesthetically pleasing shave.

[0009] Solutions for solving problems

[0010] The present invention has been made in view of the above-mentioned situation, and its object is to provide an electric shaver that is designed to prevent shaving residue, especially on long and curly beards, on the face and surrounding areas having complex shapes, and can perform a uniform deep shave on the entire surface of the target area, thereby achieving an aesthetically pleasing shaved state.

[0011] The electric shaver of one technical solution comprises: a rotating blade unit having a first outer blade in an annular or disc-shaped shape and a first inner blade that rotates while sliding in contact with the inner surface of the first outer blade; a reciprocating blade unit having a second outer blade in a curved arc shape and a second inner blade that reciprocates while sliding in contact with the inner surface of the second outer blade; and a motor. The essential elements of the electric shaver are: the reciprocating blade unit is arranged on the main body in such a manner that the second outer blade can move up and down, and the rotating blade unit is arranged on the main body in such a manner that when the top of the second outer blade is in any position, the upper surface of the first outer blade can be tilted to a position parallel to a tangent plane that is tangent to the upper surface of the second outer blade and the farthest part of the upper surface of the first outer blade that is farthest from the second outer blade.

[0012] This improves the close contact of the outer blades with respect to the face and surrounding areas having a complex shape, prevents shaving residues on long and curly beards, and enables a uniform deep shave.

[0013] For example, a configuration may be adopted in which two sets of the rotary blade units are provided and the rotary blade units are arranged such that a line connecting the centers of the rotary blade units in a plan view is parallel to the longitudinal direction of the reciprocating blade unit.

[0014] For example, a configuration may be adopted in which two sets of the reciprocating blade units are provided and arranged in series so that the center lines of the respective longitudinal directions are aligned in a plan view.

[0015] Furthermore, it is preferable to include a flexible arm for transmitting the driving force of the motor to the first inner blade.

[0016] Effects of the Invention

[0017] According to the present invention, the outer blade can improve the close contact of the face and surrounding areas with complex shapes. In particular, by preventing the shaving residue of long and curly beards and performing a uniform deep shave on the entire target area, a beautiful shaved state can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram (perspective view) showing an example of an electric shaver according to a first embodiment of the present invention.

[0019] Figure 2 Yes Figure 1 Schematic diagram (exploded perspective view) of an example of a driving mechanism of an electric shaver shown.

[0020] Figure 3 Yes Figure 1 The diagram is a schematic view (perspective view) of an example of outer blades and inner blades of a rotary blade unit of an electric shaver.

[0021] Figure 4 Yes Figure 1 The diagram is a schematic view (perspective view) of an example of outer blades and inner blades of a reciprocating blade unit of an electric shaver.

[0022] Figures 5A to 5C It is an explanation Figure 1 The diagram is for explaining the operation of the rotary blade unit and the reciprocating blade unit of the electric shaver shown.

[0023] Figure 6 It is an explanation Figure 1 The diagram shows an electric shaver in use.

[0024] Figure 7A and Figure 7B It is an explanation Figure 1 The diagram shows an electric shaver in use.

[0025] Figure 8A and Figure 8B It is an explanation Figure 1 The diagram shows an electric shaver in use.

[0026] Figure 9 This is a schematic diagram (perspective view) showing another example of the electric shaver according to the first embodiment of the present invention.

[0027] Figure 10 It is a schematic diagram (side view) showing an example of an electric shaver according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0028] (First embodiment)

[0029] Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. Figure 1 : is a schematic diagram (perspective diagram) showing an example of the electric shaver 1 of this embodiment. Figure 2 This is a schematic diagram (exploded perspective view) showing an example of a drive mechanism for an electric shaver 1. For ease of explanation, arrows are used in the figures to indicate up and down, left and right, and front and back directions. In all figures used to illustrate the embodiments, components having the same functions are denoted by the same reference numerals, and duplicate descriptions thereof are omitted.

[0030] The electric shaver 1 of this embodiment includes a main body 2. The upper portion of the main body 2 is formed into a head 3 (in this application, "main body" is used as a general term including the head). Figure 1As shown, it is configured as an integral body so as not to be able to swing relative to the main body 2, or it may be configured as a separate body so as to be able to swing relative to the main body 2 (not shown).

[0031] Inside the main body 2 are a motor M (one in this embodiment) that drives the inner blades (described later); a battery (not shown) that supplies power to the motor M; and a control unit (not shown) that controls a series of operations, including the rotational drive of the motor M. The battery may be a storage battery or a dry cell. A switch (not shown) for turning the power on and off is also provided on the front surface of the main body 2.

[0032] On the other hand, a plurality of blade units are provided in the head portion 3. For example, two sets (or one set or three or more sets) of rotary blade units 4 and one set (or two or more sets) of reciprocating blade units 5 are provided. Furthermore, the reciprocating blade unit 5 may be supported in the main body 2 at a position lower than the head portion 3 (not shown).

[0033] Specifically, if Figure 1 As shown, the two sets of rotary blade units 4 are arranged so that the first outer blades 11 (described later) constituting the units have the same diameter and their upper surfaces are at the same height, and are arranged so that the line connecting their centers when viewed from above is parallel to the longitudinal direction of the reciprocating blade unit 5 (the reciprocating direction of the second inner blades 22 (described later)). In addition, one set of reciprocating blade units 5 is arranged so that the second outer blades 21 (described later) constituting the unit have a length that spans both ends of the two first outer blades 11.

[0034] First, the rotary blade unit 4 will be described. The rotary blade unit 4 of this embodiment includes a first outer blade 11 in an annular shape (which may be arranged in one row or in two or more rows) and a first inner blade 12 that rotates while sliding in contact with the inner surface of the first outer blade 11. Alternatively, the first outer blade may be configured as a disk-shaped (so-called dome-shaped) structure (not shown).

[0035] The first outer blade 11 and the first inner blade 12 are mounted in a combined state on the blade holder 10. The blade holder 10 is mounted on the head 3 in such a manner that a spring member (not shown) is interposed therebetween so as to be able to swing forward, backward, left, right, and move up and down.

[0036] The first outer blade 11 of this embodiment is formed into an integral structure by using a flat metal material of a predetermined thickness (thicker than the second outer blade 21 described later) formed by a stainless steel alloy or the like, and performing die-cutting, drawing, bending and other processes based on stamping. The first outer blade 11 has a roughly cup-shaped shape with the periphery bent downward. In addition, a plurality of beard entry openings 13 (only a portion of the beard entry openings 13 are marked with reference numerals for simplicity of the figure) are formed from the outer surface, i.e., the upper surface 11a, to a portion of the side surface 11b (or only on the upper surface 11a) for the beard to enter. Thus, the lower end of the beard entry opening 13 and the front end of the first inner blade 12 (small blade 14) described later can be used to clamp and cut the beard entering the beard entry opening 13. In addition, the beard entry opening 13 can adopt various shapes such as a radial slit shape, a circular hole shape, or a combination of the above shapes.

[0037] The first inner blade 12 of the present embodiment is composed of a plurality of small blades 14 (only a part of the small blades 14 is marked with reference numerals for the sake of simplicity of the figure), and the plurality of small blades 14 are formed by using a flat metal material of a predetermined thickness formed by a stainless steel alloy or the like, performing die-cutting, bending and other processing based on a stamping process and making a part of the flat plate portion 12a stand up relative to the plate surface. As an example, Figure 3 As shown, the small blade 14 is formed so that the front end surface is inclined toward the front side in the rotation direction. Therefore, the upper end edge on the front side in the rotation direction becomes the blade tip.

[0038] The radial width of the blade 14 of the present embodiment is formed as identical from the top to the bottom, and as an example, is to have radial width and be about 1mm and circumferential width and be the roughly prism shape of the rectangular cross section of about 0.5mm, and length (length from the root to the blade tip) is formed as about 3mm. But, be not limited to this size shape.

[0039] In addition, in the present embodiment, the 1st outer blade 11 has the annular structure that is two rows in radial direction, and the blade 14 of the 1st inner blade 12 corresponding thereto also becomes the structure that two rows, so-called double track are set in radial direction. But, be not limited to this, also can be made as (not shown) more than one row or three rows.

[0040] In addition, a driving force transmission member (a flexible arm in this embodiment) 16 (see FIG. 1 ) is provided for transmitting the driving force of the motor M to the first inner blade 12 via the gear portion 42 to rotate the first inner blade 12. Figure 2As an example, the first inner blade 12 is fixed to the inner blade base 15 and is connected to the driving force transmission member (flexible arm) 16 at the lower portion of the inner blade base 15 by means of a driving pin or the like (not shown) (or directly). In addition, the "flexible arm" refers to a member formed into a coil spring shape by using a metal material, for example, and refers to a rotational force transmission member whose length and inclination are variable within a predetermined range (however, it is not limited to this structure).

[0041] The action of bringing the first inner blade 12 into sliding contact with the first outer blade 11 may be produced by utilizing the flexible arm 16 described above, or by compressing a spring member mounted on a drive pin (not shown).

[0042] Next, the reciprocating blade unit 5 will be described. The reciprocating blade unit 5 of this embodiment includes a curved arc-shaped second outer blade 21 and a second inner blade 22 that reciprocates while sliding in contact with the inner surface of the second outer blade 21 .

[0043] The second outer blade 21 and the second inner blade 22 are mounted on the blade holder 20 in such a manner that, when combined, they are interposed with a spring member (not shown) and the like so as to be able to swing forward and backward, left and right, and to move up and down. Furthermore, the blade holder 20 is mounted on the head 3 or a position below the head 3 (or a position involving both) in such a manner so as to be able to move up and down.

[0044] The second outer blade 21 of this embodiment is constructed by using a flat metal plate of a predetermined thickness (thinner than the first outer blade 11 described above) made of a stainless steel alloy or the like, and then bending this flat plate into an arcuate (arched) shape, thereby securing it to the outer blade base 23. Here, "arc-shaped" refers to a shape that appears like an inverted U when cut along a plane perpendicular to the longitudinal direction. Numerous beard entry openings 19 are formed through the upper surface 21a of the second outer blade 21 (specifically, the arcuately curved top 21b and peripheral portion 21c) for the entry of beards (only some of these beard entry openings 19 are denoted by reference numerals for simplicity). This allows the lower end of these beard entry openings 19 and the tip of the second inner blade 22 (small blade 24), described later, to pinch and cut the beards that enter these openings. Furthermore, the beard entry openings 19 can have various shapes, such as a mesh or circular hole.

[0045] The 2nd inner blade 22 of the present embodiment becomes by using the flat plate-shaped metal material of the predetermined thickness formed by stainless steel alloy etc. and makes this flat plate-shaped metal material bend in arc shape (arch shape), namely bend into the shape of the inverted letter U in the cross-sectional view cut with the face orthogonal to the longitudinal direction and be fixed to the structure of inner blade base 25.As an example, many small blades 24 of arc shape (arch shape) are formed integrally in the 2nd inner blade 22 (only a part of small blade 24 is recorded with reference numeral for the simplification of figure).The upper surface 22a (specifically, the top 22b of the shape that is curved in arc shape and the surface of peripheral portion 22c) of this 2nd inner blade 22 (small blade 24) becomes the curved surface that slides in contact with the lower surface (inner surface of top 21b and peripheral portion 21c) of the 2nd outer blade 21.

[0046] In addition, a driving force transmission member (vibrator) 26 (see FIG. 2 ) is provided for transmitting the driving force of the motor M to the second inner blade 22 via the gear portion 42 to vibrate (reciprocate) the second inner blade 22. Figure 2 ). In this embodiment, the structure is as follows: the rotational motion of the motor M is converted into the reciprocating motion of the vibrator 26 via the crankshaft 27. As an example, the second inner blade 22 is fixed to the inner blade base 25, and is connected to the driving force transmission member (vibrator) 26 at the lower part of the inner blade base 25 by means of a supporting member or the like (not shown) (or directly). In addition, without being limited to the above structure, a structure (not shown) can also be set to use a linear motor or the like to make the vibrator 26 (i.e., the second inner blade 22) reciprocate.

[0047] The action of bringing the second inner blade 22 into sliding contact with the second outer blade 21 may be achieved by compressing a spring member mounted on the aforementioned support member (not shown) or by utilizing other structures (not shown).

[0048] Next, the operation of the electric shaver 1 according to this embodiment will be described. Figures 5A to 5C : is an explanatory diagram for explaining the operation of each blade unit 4, 5. Figures 6 to 8A 、 Figure 8B 1 is an explanatory diagram illustrating a state in which the electric shaver 1 is used.

[0049] First, if Figure 5AAs shown, a state in which the top 21b of the second outer blade 21 of the reciprocating blade unit 5 (in a state not tilted and not moved up and down) and the upper surface 11a of the first outer blade 11 of the rotary blade unit 4 (in a state not tilted and not moved up and down) are at the same height is defined as a "basic state." The reciprocating blade unit 5 is configured to be movable up and down between a position in which the top 21b of the second outer blade 21 is higher than the upper surface 11a of the first outer blade 11 and a position in which the top 21b of the second outer blade 21 is lower than the upper surface 11a of the first outer blade 11, relative to this "basic state."

[0050] On the other hand, the rotary blade unit 4 is configured so that, with respect to the above-mentioned "basic state," when the top 21b of the second outer blade 21 of the reciprocating blade unit 5 is located at any position, the upper surface 11a of the first outer blade 11 can be tilted to a position parallel to a tangent plane tangent to the farthest portion 11c of the upper surface 11a of the first outer blade 11, which is farthest from the second outer blade 21, and the upper surface 21a of the second outer blade 21. Specifically, as Figure 5B As shown, the rotary blade unit 4 is configured so that, when the top 21b of the second outer blade 21 is located at a higher position relative to the upper surface 11a of the first outer blade 11, the upper surface 11a of the first outer blade 11 can be tilted to a position parallel to the tangent plane P1 that is tangent to the upper surface 21a of the second outer blade 21 and the farthest portion 11c farthest from the second outer blade 21. Figure 5C As shown, the rotary blade unit 4 is configured such that, when the top 21b of the second outer blade 21 is located at a lower position relative to the upper surface 11a of the first outer blade 11, the upper surface 11a of the first outer blade 11 can be tilted to a position parallel to a tangent plane P2 tangent to the farthest portion 11c farthest from the second outer blade 21 and the upper surface 21a of the second outer blade 21. In addition, the "parallel" mentioned here is not limited to strict parallelism, but also includes the case of slight deviation.

[0051] Furthermore, as described above, by providing the flexible arm 16 for transmitting the driving force of the motor M to the first inner blade 12, a structure in which multiple sets (two sets in this embodiment) of rotary blade units 4 are tilted independently (not in conjunction with each other) can be realized.

[0052] Next, as a specific usage status, use Figure 6The case of using the cheeks will be described. The cheeks are the largest area of ​​the face and its surroundings where beards are shaved. Therefore, various electric shavers have been developed in the past. These shavers have multiple (e.g., two or three sets) rotary blade units or multiple (e.g., two to six sets) reciprocating blade units, enabling efficient shaving in a shorter time compared to a single (one) unit. However, as mentioned above, rotary electric shavers have the following problem: they are easy to shave long and curly beards, but difficult to achieve a deep shave. On the other hand, reciprocating electric shavers have the following problem: they are easy to achieve a deep shave, but difficult to achieve a deep shave on long and curly beards. In contrast, the electric shaver 1 of this embodiment, which includes two rotary blade units 4 and one reciprocating blade unit 5 as a multiple blade unit structure, can prevent shaving residue, especially on long and curly beards, and achieve a uniform deep shave across the entire target area. When shaving the cheek, it is preferable to set each blade unit 4, 5 as the above Figure 5C Thus, you can shave your beard in a comfortable posture without lifting your elbows. Figure 5A 、 Figure 5B status to use.

[0053] In addition, as mentioned above, there is the problem that the beard cannot be fully shaved in the face and its surrounding areas such as the jaw (to the neck) and the nose, which are formed by a complex shape. In contrast, the electric razor 1 according to this embodiment can solve this problem.

[0054] Specifically, using Figure 7A and Figure 7B The following describes the use under the jaw. In the past, electric shavers, especially those with multiple blade units, it was difficult to fit the blades (outer blades) tightly to the complex shape of the jaw. Therefore, the user was forced to use the shaver with the face facing upwards. In contrast, Figure 7A As shown, in the electric shaver 1 of this embodiment, by setting each blade unit 4, 5 as the above Figure 5B The shaving razor blade 11 can be used in a state of being tilted upwards, and the first outer blade 11 and the second outer blade 21 (especially the first outer blade 11) can be easily brought into close contact with the jaw without forcing the user to turn his face upwards. Therefore, the first outer blade 11 can be used to shave long and curly beards without leaving any residue, and the second outer blade 21 can be used to shave deeply and beautifully. In addition, if Figure 7B As shown, by appropriately setting each blade unit 4, 5 to the above Figure 5C Use it in the state of being able to shave the submandibular area from the front to the back without missing any area and beautifully.

[0055] Next, use Figure 8A and Figure 8B The following describes the use under the nose. In conventional electric shavers, especially when equipped with multiple blade units, it is difficult to fit the blades (outer blades) closely to the complex shape and narrow width of the nose. Figure 8A As shown, in the electric shaver 1 of this embodiment, by setting each blade unit 4, 5 as the above Figure 5C The first outer blade 11 can be easily fitted closely to the nose. Figure 8B As shown, by setting each blade unit 4, 5 as the above Figure 5B The second outer blade 21 can be easily fitted under the nose. Thus, the first outer blade 11 can be utilized to shave long beards and curly beards without residue, and the second outer blade 21 can be utilized to perform deep shaving and shave beautifully.

[0056] (Second embodiment)

[0057] Next, an electric shaver 1 according to a second embodiment of the present invention will be described. Since the basic structure is the same as that of the first embodiment, the description will focus on the differences. Figure 10 1 is a schematic diagram (side view) showing an example of the electric shaver 1 of this embodiment. Figure 10 The arrow A in the figure indicates the direction of movement (up and down movement) of the reciprocating blade unit 5. The scale next to the arrow A indicates the orientation set for adjusting the movement of the reciprocating blade unit 5. For example, the unit is set so that it can move to two positions upward (orientation 1, orientation 2) and two positions downward (orientation -1, orientation -2) with the reference position (center position) as orientation 0 (however, this is not limited to this). Furthermore, in this embodiment, the rotary blade unit 4 is also provided on the main body 2 in the following manner: when the top 21b of the second outer blade 21 of the reciprocating blade unit 5 is in any position (five orientations in this embodiment), the upper surface 11a of the first outer blade 11 can be tilted to a position parallel to (not limited to strictly parallel to) a tangent plane tangent to the farthest portion 11c of the upper surface 11a of the first outer blade 11, which is farthest from the second outer blade 21, and the upper surface 21a of the second outer blade 21. This structure is the same as that of the first embodiment described above.

[0058] In this embodiment, the structure is as follows: a motor (first motor) M1 for driving the first inner blade 12 of the rotary blade unit 4 and a motor (second motor) M2 for driving the second inner blade 22 of the reciprocating blade unit 5 are respectively provided, and the rotational speeds can be set individually (in addition, in each unit 4, 5, when the number of units is multiple, it is also possible to have one motor in common or to have multiple motors corresponding to the number of units).

[0059] Furthermore, in this embodiment, the speed of each inner blade 12, 22, that is, the rotational speed of the first motor M1 of the rotary blade unit 4 and the rotational speed of the second motor M2 of the reciprocating blade unit 5, are set so as to change in accordance with (linked with) the moving position (orientation) of the reciprocating blade unit 5. For example, the setting is as shown in Table 1 below (however, the present invention is not limited to this).

[0060] [Table 1]

[0061]

[0062] Table 1 Setting of motor speeds according to orientation

[0063] Specifically, when the first outer blade 11 and the second outer blade 21 are arranged in a direction perpendicular to the axis of the head 3, that is, the moving direction (up and down moving direction) of the reciprocating blade unit 5, as a neutral position (orientation 0), when the second outer blade 21 is located at an orientation higher than the neutral position (orientation 1, 2), the rotational speed of the second motor M2 remains unchanged, and the rotational speed of the first motor M1 is set to a rotational speed lower than the rotational speed of the first motor M1 in the neutral position. In addition, when the second outer blade 21 is located at an orientation lower than the neutral position (orientation -1, -2), the rotational speed of the first motor M1 remains unchanged, and the rotational speed of the second motor M2 is set to a rotational speed higher than the rotational speed of the second motor M2 in the neutral position.

[0064] This configuration allows for shaving in the optimal orientation (at the optimal rotational speed of each motor M1 and M2, i.e., the optimal speed of each inner blade 12 and 22) according to the complex shape of the face. For example, the skin on the cheeks is relatively elastic and less prone to sagging, so selecting orientations -1 and -2 allows for shaving that prioritizes cutting performance. For another example, the skin under the jawline is prone to sagging, so selecting orientations 1 and 2 allows for shaving that minimizes damage.

[0065] As described above, the electric shaver 1 of the present invention is designed to prevent shaving residue, especially on long beards and curly beards, from being left on the face and surrounding areas having complex shapes, and to provide a uniform deep shave over the entire target area, thereby achieving an aesthetically pleasing shaved state.

[0066] In addition, the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention. For example, a structure with two sets of rotary blade units 4 and two sets of reciprocating blade units 5 can also be provided. Specifically, Figure 9 As shown, two sets of reciprocating blade units 5 are provided, with at least the second outer blades 21 having the same width (widthwise) and their top surfaces at the same height. These two sets of reciprocating blade units 5 are arranged in series so that the longitudinal centerlines of their respective second outer blades 21 (i.e., a line parallel to the longitudinal direction and perpendicular to the widthwise centerline) are aligned when viewed from above. This configuration further enhances the ability of the second outer blades 21 of the reciprocating blade units 5 to follow the skin, thereby further enhancing the aforementioned effects of the present invention.

Claims

1. An electric shaver comprising: a rotary blade unit having a first outer blade in the shape of an annulus or a disk and a first inner blade that rotates while sliding in contact with the inner surface of the first outer blade; a reciprocating blade unit having a second outer blade in the shape of a curved arc and a second inner blade that reciprocates while sliding in contact with the inner surface of the second outer blade; and a motor, wherein: The reciprocating blade unit is provided on the main body in such a manner that the second outer blade can move up and down. The rotary blade unit is arranged on the main body in the following manner: when the top of the second outer blade is in any position, the upper surface of the first outer blade can be tilted to a position parallel to a tangent plane tangent to the upper surface of the second outer blade and the farthest part of the upper surface of the first outer blade that is farthest from the second outer blade.

2. The electric shaver according to claim 1, characterized in that The rotary blade units are provided in two sets and are arranged such that a line connecting the centers of the rotary blade units in a plan view is parallel to the longitudinal direction of the reciprocating blade unit.

3. The electric shaver according to claim 2, characterized in that The electric shaver includes a flexible arm that transmits the driving force of the motor to the first inner blade.

4. The electric shaver according to any one of claims 1 to 3, characterized in that The reciprocating blade units are provided in two sets and are arranged in series so that their longitudinal center lines are aligned in a plan view.

5. The electric shaver according to claim 1, wherein The electric shaver includes a first motor for driving the first inner blades of the rotary blade unit and a second motor for driving the second inner blades of the reciprocating blade unit.

6. The electric shaver according to claim 5, characterized in that The electric shaver is set so that the rotation speeds of the first motor and the second motor vary according to the vertical position of the reciprocating blade unit.

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