JPH09164278A - Electric pazor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely hold an inner blade body to an outer blade case. SOLUTION: In this electric razor with which the inner blade body 30 provided in an arrange hole 32 and equipped with an inner blade 35 having a blade part is rotated inside the outer blade case 20 equipped with an outer blade, a loop-shaped engage projecting part 24 protruded inside is formed on one terminal side of outer blade case 20, and an engage element 36 to be engaged with the engage projecting part 24 is provided at the outer peripheral part of blade part 35c provided on one terminal side of substrate part 35a of inner blade 35. At the same time, a guide part 35d to be slid and turned inside the arrange hole 32 is formed on the other terminal side of the substrate part 35a. When the inner blade body 30 is moved in the axial direction passing through the center of an inner blade stand 31 and pressure received from the engage projecting part 24 to the engage element 36 exceeds the energizing force of an elastic member 38, the inner blade 35 is turned toward the center of inner blade stand 31 with a guide part 38 as a turn supporting point, and the engage projecting part 24 and the engage element 36 are disengaged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric razor, and more particularly to holding an inner blade member in an outer blade case.

[0002]

2. Description of the Related Art In a conventional rotor type electric shaver (hereinafter simply referred to as an electric shaver), a main body case is provided with an installation chamber for arranging an inner blade, and a large number of openings are provided in the opening. An outer blade case having an outer blade having a whisker introduction hole is provided, and an inner blade body made up of an inner blade slidably contacting the inner surface of the outer blade and an inner blade base having the inner blade attached is arranged in the arrangement chamber. The inner blade is rotated by a motor provided in the main body case to cut the beard introduced from the beard introducing hole, so that the beard is shaved. It is adapted to be stored in the installation chamber. Then, when the whiskers accumulated in the arrangement chamber are discarded, the outer blade case is removed from the arrangement chamber, and then the inner blade body is removed and then discarded from the opening.

By the way, in the case where the outer blade case is removed from the installation chamber when the beard waste is thrown away, the inner blade remains in the installation chamber, so the operation switch is accidentally closed. If this is done, the motor rotates and the inner blade body rotates with the inner blade exposed, which is very dangerous. A conventional electric shaver that solves this problem will be described with reference to FIG.

FIG. 7 is a view in which a part of the main body of the electric razor is omitted, and 100 is a main body case. Inside the main body case 100, a motor 101 is installed by screws (not shown). ing. Further, in the figure of the main body case 100, an installation chamber 110 which is opened upward and is formed by an annular wall 111 is provided, and the output shaft 102 of the motor 101 is projected from a bottom wall 112 of the installation chamber 110. I am letting you. A male screw 113 is provided on the outer circumference of the opening. An outer blade 121 having a large number of beard introducing holes (not shown) is attached to the opening and the male screw 113 is attached.
Outer blade case 120 having a female screw 122 formed therein
Is attached by screwing the female screw 122 onto the male screw 113. An annular engaging rib 123 protruding inward is formed on the inner peripheral wall of the outer blade case near the outer peripheral edge of the outer blade 121.

The inner blade body 13 is disposed in the disposing chamber 110.
0 is provided. The inner blade body 130 is made of a synthetic resin and has an inner hole 131 provided with an arrangement hole 132, and a blade 133a is formed at one end side, that is, the outer blade 121 side, and is arranged movably in the arrangement hole 132. One end of the inner blade 133 is attached to the inner blade 133 and the other end of the inner blade 133 is attached to the inner blade 133.
And the blade 133a of the inner blade 133 is engaged with the outer blade 12
1 is composed of a spring 134 that urges the inner peripheral surface of the spring 1 into pressure contact. A coupling 135 is formed in the lower central portion of the inner blade base 131 in the drawing, and the coupling 135 is used to connect the output shaft 102 of the motor 101.
The inner blade body 130 is rotatably arranged in the arrangement chamber 110 by fitting it to the coupling 103 attached to the.

Further, a plurality of engaging pieces 136 (only one is shown in the drawing) for engaging with the engaging ribs 123 are provided on the outer periphery of the upper portion of the inner blade base 131. The engagement piece 136 has a thin wall thickness so that it can be deformed in the vertical direction in the drawing. Then, as shown in the figure, the inner blade 1
When the inner blade stand 131 of 30 is put in a predetermined position inside the outer blade case 120, the tip end portion of the engagement piece 136 is in a relationship of engaging with the engagement rib 123 provided on the outer blade case 120. The inner blade base 131, that is, the inner blade body 130
In the figure, when it moves downward, the engagement piece 36 engages with the engagement rib 123 and the inner blade body 130 moves to the outer blade case 120.
It is designed to be held within. Therefore, when the outer blade case 120 is removed from the arrangement chamber 110, the inner blade body 130 is held in the outer blade case 120. That is, when the outer blade case 120 is removed from the disposing chamber 110, such as when throwing away beard scraps, the inner blade body 130 is removed together with the outer blade case 120, and thus only the inner blade body 130 is disposing the disposing chamber 110. It is not left inside and can prevent the above-mentioned dangers.

Then, the inner blade body 130 is replaced with the outer blade case 120.
In the case of taking it out from the inside, when the lower part of the inner blade base 131 is grasped with a finger and pulled so as to be drawn out downward in the drawing, the tip end part of the engagement piece 136 is deformed or bent toward the upper side and the engagement rib is formed. Since it comes off from 123, the inner blade 13
0 can be taken out from the outer blade case 120. On the contrary, when the inner blade body 130 is inserted into the outer blade case 120, the lower end portion of the inner blade base 131 is pinched with a finger and pushed upward in the figure, contrary to the case of taking it out, and the tip portion of the engagement piece 136 is pushed. Is bent downward, and the front end portion is engaged with the engaging rib 123.
When it goes over, the engaging piece 136 returns to its original state due to its own elastic force, and its tip end engages with the engaging rib 123.

Because of the above-mentioned structure,
When the outer blade case 120 is removed from the arrangement chamber 110, such as when the beard scraps accumulated in the arrangement chamber 110 are discarded or the inner blade body 130 is cleaned, the inner blade body 130 is Since it is removed together with the inner blade body 130 when the outer blade case 120 is removed.
However, the coupling 135 provided on the inner blade base 131 and the coupling 104 are not left in the installation chamber 110 in the engaged state, and the danger can be prevented as described above.

However, the above-mentioned conventional structure has the engaging ribs 12
Since the engaging piece 136 that engages with No. 3 is made of synthetic resin, it is forcibly bent each time the inner blade body 130 is attached to or detached from the outer blade case 120, so that it engages when used for a long period of time. The bending of the piece 136 causes it to be broken, and this fatigue causes damage to the piece 136.
A situation occurs in which engagement with 23 cannot be ensured. As a result, when the outer blade case 120 is removed, the inner blade 130 is left behind in the installation chamber 110, and there is a problem that the same risk as in the conventional case occurs.

[0010]

As described above, in the conventional structure in which the inner blade body 130 is held in the outer blade case 120, the engaging piece 136 engaging with the engaging rib 123 is made of synthetic resin. During repeated attachment / detachment of the inner blade body 130 to / from the outer blade case 120, the inner blade body 130 is damaged due to fatigue caused by the bending motion that is forcibly applied, and the engagement with the engagement rib 123 becomes uncertain due to some wear. As a result, when the outer blade case 120 is removed, the inner blade body 130 is left behind inside the installation chamber 110, and if the operation switch is accidentally closed, the exposed inner blade body 130 rotates, which is dangerous. There is a problem that a condition occurs.

[0011]

The present invention has been made in view of the above circumstances, and the invention according to claim 1 is such that a drive shaft for transmitting the rotational force of a motor provided inside is arranged and the outside is opened. In addition, a main body case having an installation chamber provided with mounting means on the outer periphery and an outer blade having a large number of whiskers introduction holes formed in a substantially cylindrical shape are mounted on the other end, and detachable from the mounting means on the other end. An outer blade case having attachable means that can be attached, an inner blade base having a circular shape and a coupling means that can be engaged with and disengaged from the drive shaft at the center of one side surface, and in which an installation hole is formed, metal Provided on the inner blade and the inner blade base, which is made of a thin plate and is loosely fitted in the mounting hole, and a blade portion having a blade at the tip edge is provided on one end side of the substrate portion located on the outer blade side. Bullet that urges the inner blade toward the outer blade In an electric shaver including an inner blade body made of a member, an annular engaging protrusion protruding inward is formed on an inner peripheral wall near one end side of the outer blade case, and an outer peripheral portion of the blade portion of the inner blade. An engaging piece that engages and disengages with the engaging convex portion is formed, and a guide portion that is slidable and rotatable in the arrangement hole is formed on the other end side of the substrate portion, and the inner blade body is When the pressing force that the engaging piece receives from the engaging projection exceeds the urging force of the elastic member by moving in the axial direction passing through the center of the blade base and the urging force of the elastic member is exceeded, the inner blade uses the guide portion as a fulcrum for the inner blade. It is an electric razor that is rotated in the direction of the center of the table to release the engagement between the engagement protrusion and the engagement piece,
The invention according to claim 2 is the guide part according to the invention according to claim 1, wherein at least one of the fitting projection and the fitting piece slides an engagement piece in a tip direction of the engagement projection. It is an electric razor that has formed.

According to the first aspect of the invention having the above-mentioned structure, the engaging piece provided on the inner blade and engaging with the engaging projection formed on the outer blade case is elastic for urging the inner blade. Since the engaging piece is disengaged by rotating in the direction of the center of the inner blade against the urging force of the member, the engaging piece does not bend, and therefore fatigue due to bending does not occur It is possible to prevent damage due to it, and since the engaging piece is made of metal like the inner blade, it does not wear, and therefore, it is possible to prevent the engagement from becoming uncertain due to this wear. And the invention according to claim 2 is
In addition to the function of the above-mentioned claim 1, since the engaging projection and the engaging piece are easily engaged and disengaged by the guide, the inner blade can be easily attached and detached to and from the outer blade case. It has the effect of being able to.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, A is a rotary electric shaver (hereinafter simply referred to as an electric shaver), and 1 is a main body case of the electric shaver A. The main body case 1 is formed in a substantially cylindrical shape, and a motor 2 is installed therein by a screw (not shown), and a battery (not shown) that supplies electric power to the motor is provided inside the main body case 1. Is stored. Further, in the figure of the main body case 1, a concave portion 1 formed by engraving the main body case 1 inward and surrounding it with an annular wall 11a is formed.
2 and an arrangement chamber 1 for arranging an inner blade body 30 which will be described later and which is formed by an annular wall 11b formed by projecting above the concave portion 12 and has an opening 11c on the outer side, that is, in the drawing.
No. 0 is provided, and the output shaft 2a of the motor 2 projects from the through hole 14 provided in the bottom wall 13 of the installation chamber 10. A coupling 3 as a drive shaft for transmitting the rotational force of the motor 2 is attached to the output shaft 2a. A centering shaft 3a is formed at the tip of the coupling 3, and an engaging portion 3b made of irregularities is provided at the base. Further, a male screw 15 as an attaching means is formed on the outer periphery of the annular wall 11b of the arrangement chamber 10.

An outer blade case 20 made of synthetic resin is detachably attached to the disposing chamber 10.
The outer blade case 20 is formed in a substantially cylindrical shape by an annular wall 21, and an outer blade 22 having a large number of beard introducing holes (not shown) is formed on one end side thereof, that is, the upper side in FIG. It is attached to the outer blade case 20 by integral molding. Further, a female screw 23 as a means to be attached is formed on the other end side of the outer blade case 20, that is, on the inner peripheral surface opposite to the side to which the outer blade 22 is attached, and this female screw 23 is attached to the outer periphery of the annular wall 11b. Male screw formed on 15
The installation chamber 1 by screwing into or unscrewing from
It is designed to be attached and detached to 0.

Further, an annular engaging projection 24 projecting inward is formed on the inner peripheral wall on the one end side of the outer blade case 20, that is, on the side on which the outer blade 22 is mounted. The engaging convex portion 24 is provided with a guide portion 2 that is inclined so as to gradually widen from the tip portion toward the base portion.
4a and 24b are formed. This guide portion 24a, 2
The reference numeral 4 b functions to slide the tip end portion of the engagement piece 36, which will be described later, toward the tip end portion of the engagement protrusion portion 24 to facilitate the engagement and disengagement from the engagement protrusion portion 24.

Next, the inner blade body 30 which is detachably mounted in the mounting chamber 10 will be described. This inner blade 30
Is composed of an inner blade base 31, an inner blade 35 movably attached to the inner blade base 31, and a spring 38 as an elastic member for urging the inner blade 35 toward the outer blade 22. And, the inner blade base 31 is made of synthetic resin, as shown in FIG.
As shown in FIG. 2, it is formed in a circular shape, and has a shaft center coinciding with the central axis of the inner blade base 31 in the central portion on the lower surface side in the figure, and is fitted to the centering shaft portion 3a of the coupling 3. As a coupling means having a centering bearing portion 31a and an engaging portion 31b which is formed below the centering bearing portion 31a and which is formed on the engaging portion 3b of the coupling 3 so as to engage and disengage. A coupling 31c is formed. Further, as shown in FIG. 2, the inner blade base 31 is provided with three inner blades 35 formed in a radial position from the center thereof so as to penetrate therethrough in a direction parallel to the central axis in a loosely fitted state. Arrangement hole 32
Is provided. The outer diameter of the inner blade base 31 is set to be slightly smaller than the inner diameter of the engaging projection 24 formed on the outer blade case 20.

Next, the inner blade 35 is made of a thin metal plate, and its width, that is, the A dimension shown in FIG. 5 is set to be smaller than the width direction of the mounting hole 32, that is, the B dimension shown in FIG. 5 by a predetermined dimension. A board portion 35a and a blade portion 35 having a blade 35b on one end side of the board portion 35a as shown in FIGS.
c is provided, and an engaging piece 36 that engages and disengages with the engaging projection 24 provided on the outer blade case 20 is formed on the outer side of the blade portion 35c. That is, in this engaging piece 36, as shown in FIG. 3, the board portion 35a of the inner blade 35 is the inner blade base 31.
When it is in a state parallel to the axis passing through the center of the inner edge of the inner blade base 31, it is in a relationship of engaging with the engaging protrusion 24 as shown in FIG. It is set so that the engagement with the engagement convex portion 24 is released, that is, the engagement is disengaged when it is rotated by.

Guide portions 35d and 35d are formed on both sides in the width direction of the other end of the substrate portion 35a, and the guide portions 35d and 35d are slightly projected from both sides of the substrate portion 35a. It is formed and is set to be smaller than the dimension of the arrangement hole 32 in the width direction by a predetermined dimension. That is, when the inner blade 35 is biased in the direction of the outer blade 22 by the spring 38, the inner blade 35 is guided in the installation hole 32 by the guide portions 35d and 35d and moves upward, and When the engaging piece 36 is guided by the guide portion 24a or 24b of the engaging convex portion 24, that is, when the tip end portion of the engaging piece 36 is pressed by the guide portions 24a and 24b, the inner blade 35 rotates. The size is set to allow inclining inward. Therefore, the inner blade 35 functions to guide the inside of the installation hole 32 in the vertical direction in FIG. 1 by the guide portions 35d and 35d and to guide the rotation when tilted. .

A spring receiving portion 35e is formed at the widthwise center of the base plate portion 35a and above the guide portions 35d, 35d. The spring receiving portion 35e is formed in the base plate portion 35a.
It communicates with a guide groove 35f opened at the lower edge of a.

One end of the spring 38 is attached to a mounting portion 35h provided on the lower surface side of the inner blade base 35, and the other end of the spring 38 is introduced from an opening of the guide groove 35f so as to receive the spring receiving portion. It is positioned at 35e. When the inner blade 35 is biased upward by the spring 38, the spring receiving portion 35e is provided at the central portion in the width direction of the substrate portion 35a and above the guide portions 35d, 35d. , The guide portions 35d, 3
5d is well balanced in the arrangement hole 32, that is, the inside blade 35 can be smoothly moved in the arrangement hole 32 in the vertical direction because it is guided in the arrangement hole 32 without tilting to the left and right.

Since the inner blade body 30 and the outer blade case 20 are configured as described above, the inner blade base 31 of the inner blade body 30 is located at a predetermined position in the outer blade case 20 as shown in FIGS. In the state of being put in the outer blade case 2,
Since it has a relationship of engaging with the engaging convex portion 24 formed to 0, the inner blade base 31, that is, the inner blade body 30 is held in the outer blade case 20 by this engagement. Therefore, even when the outer blade case 20 is removed from the arrangement chamber 10, the inner blade body 30 is held in the outer blade case 20. That is, when the outer blade case 20 is removed from the installation chamber 10 when throwing away the beard waste,
Since the inner blade body 30 is removed together with the outer blade case 20, the inner blade body 30 is exposed in the installation chamber 10 as in the conventional case.
Even if the operation switch S is accidentally closed, there is no danger that the inner blade body 30 will rotate.

Next, the operation of attaching and detaching the outer blade case 20 and the inner blade body 30 configured as described above will be described.

First, when throwing away beard scraps or cleaning the inner blade body 30, the inner blade body 30 is replaced with the outer blade case 2.
The case of removing from 0 will be described. First, as shown in FIG. 3, the outer blade case 20 is unscrewed from the installation chamber 10 and removed from the installation chamber 10, that is, the main body case 1. At this time, as described above, since the engaging projection 36 of the outer blade case 20 is engaged with the engaging piece 36 provided on the inner blade 35 attached to the inner blade base 31, the inner blade body 30 is not The blade is held in the blade case 20, that is, it is removed together with the outer blade case 20. Next, in order to remove the inner blade body 30 from the outer blade case 20, as shown in FIG. 4, the lower portion of the inner blade base 31, for example, the coupling 31c portion is picked with a finger and pulled out downward (in the direction of the arrow in the figure). When it is pulled to, the tip end portion of the engagement piece 36 receives a pressing force by the engagement convex portion 24, that is, the guide portion 24a, and when this pressing force exceeds the urging force of the spring 38, the inner blade body 35 causes the guide portion to move. 35d, 35d gradually inclines while rotating inwardly. And
With this rotation and downward movement, the engaging piece 36 gradually moves to the tip of the engaging convex portion 24 while being guided by the guide portion 24a, and further pulls out the inner blade body 30 downward. When it is pulled to, the engaging piece 36 slides while being guided by the guide portion 24a, gets over the tip end portion of the engaging convex portion 24 and the engagement is released or disengaged, and the inner blade body 30 is taken out from the outer blade case 20. be able to. Then, after taking out the inner blade body 30, the whiskers adhering to the inner blade base 31, the arrangement hole 32, the inner blade 35 and the like are removed and cleaned. Further, the whiskers accumulated in the arrangement chamber 10 are discarded.

Next, the operation for attaching the inner blade body 30 to the outer blade case 20 will be described.

As described above, the inner blade 30 is cleaned and the chamber 1 is arranged.
Outer blade case 20 when the work of throwing away the mustache of 0 is completed
And the inner blade body 30 is attached to the installation chamber 10. In this case, first, while lowering the inner blade body 30 with a finger, the inner blade body 30 is pushed upward in the figure contrary to the above-mentioned removal. Insert into the outer blade case 20. With this insertion, the tip end of the engagement piece 36 contacts the guide portion 24b of the engagement protrusion 24 and receives a pressing force. Then, when this pressing force exceeds the urging force of the spring 38, the inner blade body 35 is guided by the guide portions 35d, 35d and rotates while inclining inward. With this rotation and upward movement, the engagement piece 36 slides while being guided by the guide portion 24b and gradually moves to the tip end portion of the engagement convex portion 24, and the inner blade body 30 is further moved. When pushed upward, the engagement piece 36 rides over the tip end of the engagement protrusion 24 and the engagement protrusion 24.
That is, the inner blade body 30 is held in the outer blade case 20 by engaging with the guide portion 24a. In this state, the coupling 31c formed on the inner blade base 31 is engaged with the coupling 3b provided on the output shaft 2a of the motor 2 and is provided on the female screw 23 of the outer blade case 20 and the annular wall 11b of the installation chamber 10. It is attached by being screwed onto the male screw 15.

Next, the operation of the electric shaver A will be described.

First, as described above, the inner blade body 30 and the outer blade case 20 are attached to the main body case 1 to be in use. Then, as in the conventional case, the operation switch S is operated to drive the motor 2 to shave. When the shaving is continued, whiskers are accumulated in the disposition chamber 10. However, when the beard is discarded or the inner blade 30 is cleaned, the inner blade 30 is held as described above. Outer blade case 20 is provided in the chamber 10
Then, the inner blade body 30 is removed from the outer blade case 20 to dispose of the whiskers in the placement chamber 10, and the inner blade body 30 is taken out from the outer blade case 20 and cleaned as necessary. Then, after cleaning, the inner blade body 30 is put into the outer blade case 20 again and held in the outer blade case 20, and then the outer blade case 20 is attached to the arrangement chamber 10 to be in a use state.

When whiskers accumulate in the chamber 10, or when the inner blade 30 is cleaned, the inner blade 30 is held by the outer blade case 20, and the outer blade case 20 is held. Since it is removed together with the inner blade body 20, the inner blade body 30 is not left in the placement chamber 10 in an exposed state, so that the above-mentioned danger can be prevented. Since the engagement piece 36 formed on the inner blade 35 when the blade body 30 is attached or detached does not bend, there is no damage due to fatigue due to this bending,
Further, since the engagement piece 36 is made of metal, it is less likely to wear, so that the engagement due to this wear can be prevented from becoming uncertain.

Further, the engaging projection 24 has guide portions 24a, 2
4b is formed, the engagement piece 36 is fixed to the guide portion 2
Inner blade 3 for sliding while being guided by 4a and 24b
It can be easily attached to and removed from the outer blade case 20.

In the above embodiment, the engaging projections 24 are provided with the guide portions 24a and 24b to facilitate the attachment and detachment of the inner blade body 30 to and from the outer blade case 20, but this is not the case. It may be formed on the joint piece 36,
Further, the guide portion may be formed on both the engaging convex portion 24 and the engaging piece 30.

Further, in the above embodiment, the drive shaft is the coupling 3 attached to the output shaft 2a of the motor 2. However, this may be used as the drive shaft by making the output shaft 2a also serve as the coupling. is there.

Further, although the case where the present invention is applied to the rotary electric shaver has been described in the above embodiment, the present invention can also be applied to the reciprocating shaver.

[0034]

The present invention is configured as described above.
According to the first aspect of the present invention, the engagement piece that is provided on the inner blade and that engages with the engagement protrusion formed on the outer blade case is provided with an inner portion against the biasing force of the elastic member that biases the inner blade. The engagement piece is not bent because it is rotated in the direction of the center of the blade to release the engagement. Therefore, metal fatigue due to this bending does not occur, and damage caused by this metal fatigue is prevented. Further, since the engaging piece is made of metal like the inner blade, the engaging piece is less likely to be worn, so that the engagement due to the wearing can be prevented from becoming uncertain.

Further, in addition to the effect of the invention described in claim 1, the invention described in claim 2 further facilitates engagement and disengagement of the engaging convex portion and the engaging piece by the guide portion. This has the effect that the inner blade can be attached to and removed from the case easily and smoothly.

[Brief description of the drawings]

FIG. 1 is a side view in which a part of an embodiment of an electric shaver of the present invention is sectioned.

FIG. 2 is a plan view of the inner blade body of the above embodiment.

FIG. 3 is a cross-sectional view showing a state in which the outer blade case with the inner blade body attached is removed from the arrangement chamber according to the embodiment.

FIG. 4 is a cross-sectional view showing a state in which an inner blade body is removed from the outer blade case of the above embodiment.

FIG. 5 is a diagram showing a relationship between the inner blade and the arrangement holes of the inner blade base of the above embodiment.

6A and 6B are views showing the inner blade of the above embodiment, FIG. 6A is a front view, FIG. 6B is a plan view, and FIG.

FIG. 7 is a view showing a part of a main body of a conventional electric shaver.

[Explanation of symbols]

 A electric razor 1 main body of electric razor 2 motor 10 installation chamber 15 male screw (attaching means) 20 outer blade case 22 outer blade 23 female screw (attached means) 24 engaging convex portion 30 inner blade body 31 inner blade base 31c blade portion 32 arrangement hole 35 inner blade 35a base plate portion 35b blade 35c blade portion 35d guide portion 36 engaging pieces 24a, 24b guide portion

Claims (2)

[Claims] 1. A main body case having a drive chamber for transmitting the rotational force of a motor provided therein, having an opening on the outer side, and a mounting chamber provided with mounting means on the outer peripheral portion, and formed in a substantially cylindrical shape. And an outer blade case having a plurality of whiskers introducing holes on one end side and an attached means detachably attached to the attaching means on the other end side, and a circular shape formed at the center of one side surface. An inner blade base having a coupling means that can be engaged with and disengaged from the drive shaft and having a disposition hole formed therein, a base plate made of a thin metal plate that is loosely fitted in the disposition hole, and an outer blade side of the base plate part. An inner blade body having an inner blade provided with a blade portion having a blade on the tip edge on one end side located and an inner blade body provided with the inner blade base and an elastic member for urging the inner blade in the outer blade direction. In the electric razor, near the one end side of the outer blade case An annular engaging convex portion that protrudes inward is formed on the inner peripheral wall of the, and an engaging piece that engages and disengages with the engaging convex portion is formed on the outer peripheral portion of the blade portion of the inner blade, and the other end side of the substrate portion is formed. A guide portion that is slidable and rotatable in the mounting hole is formed, the inner blade body moves in the axial direction passing through the center of the inner blade base, and the engaging piece receives from the engaging convex portion. When the pressing force exceeds the urging force of the elastic member, the inner blade is rotated toward the center of the inner blade base with the guide portion as a fulcrum of rotation to engage the engagement protrusion with the engagement piece. An electric razor characterized by being released. 2. The electricity according to claim 1, wherein at least one of the fitting convex portion and the fitting piece is formed with a guide portion for sliding the engagement piece in a tip direction of the engagement convex portion. Razor.