JP4420379B2 - Electric razor - Google Patents

Description

  The present invention relates to an electric razor in which an outer blade cassette is floatingly supported so as to freely move up and down and tilt left and right.

  It is known that the outer blade cassette is supported in a floating manner in an electric razor (see Patent Document 1). There, three outer blade cassettes are supported in a floating manner by an outer blade case assembled to the outer blade frame. The outer blade cassette is formed into a cassette using a plastic frame having a square frame structure and a mesh blade that is held in an arch shape by the frame as components. A pair of left and right elastic leg pieces are provided in a C shape on the lower surface of the outer blade cassette frame mounted in front and behind the outer blade case, and these elastic leg pieces are arranged on the upper surface of the opening wall of the outer blade frame. By receiving it, the front and rear outer blade cassettes are supported in a floatable manner.

  An electric razor that supports an outer blade cassette in a floating manner by an elastic arm provided on the outer blade case side is known (see Patent Document 2). In this case, elastic arms are integrally formed on the left and right side walls of the outer cutter case, and the frame of the outer cutter cassette is floated and supported by a pair of left and right elastic arms.

JP-A-8-126782 (paragraph number 0019, FIG. 2) Japanese Patent No. 30801001 (paragraph number 0015, FIG. 2)

  According to the outer blade support structure of Patent Document 1, since the elastic leg piece is provided integrally with the frame of the outer blade cassette, the structure for floatingly supporting the outer blade can be simplified. However, the elastic leg pieces are not received by the outer cutter case to which the outer cutter cassette is attached, but are received by the outer cutter frame to which the outer cutter case is assembled, so the urging force of the outer cutter cassette tends to vary. There is a possibility that the outer blade cassette cannot be smoothly supported by floating. This is because the initial elastic force of the elastic leg pieces varies due to the molding error between the outer blade case and the outer blade frame, and the assembly errors when both are assembled, and the pushing force of the outer blade cassette varies.

  In this respect, in the electric razor of Patent Document 2, since the outer blade cassette is floated and supported by the elastic arm provided on the side wall of the outer blade case, variations in the initial elastic force of the elastic arm can be ignored, and the outer blade cassette is pushed up to a certain extent. Can be energized with force. The problem is that since the elastic arms are provided on the front and rear sides of the left and right side walls of the outer blade case, it is physically difficult to increase the length of the elastic arms (front and rear length), and it is difficult to optimize the spring characteristics. . This is because the amount of change in elastic force is large when the elastic arm is displaced by a certain amount. Although the spring characteristics cannot be improved by devising the shape and structure of the elastic arm, there are limitations. A short elastic arm may be fatigued in a short period of time and its elasticity may be lost early. Since the pair of front and rear elastic arms are integrally formed on the inner surface of the side wall of the outer cutter case, there is a disadvantage that the molding die becomes complicated and the manufacturing cost of the outer cutter case increases.

  An object of the present invention is to provide an electric shaver that not only has a simple structure, but also optimizes the spring characteristics of an elastic body provided integrally with a structure that supports the outer blade and can smoothly support the outer blade cassette. There is to do.

In the electric razor of the present invention, the razor head is provided with the inner blade 51 and the outer blade cassette 13 circumscribing the inner blade 51, and the outer blade cassette 13 is floated by the elastic body 42 provided on the outer blade holder 12. I support it. The outer blade cassette 13 includes an arch-shaped outer blade 36 and an outer blade frame 37 that supports the outer blade 36. A plurality of elastic bodies 42 that elastically support the outer blade frame 37 are integrally formed on the inner surface of the outer blade holder 12. The elastic body 42 is formed including left and right laterally long elastic arms 44 extending substantially parallel to the front and rear walls 26 a of the outer blade holder 12 . The outer blade holder 12 includes a square frame-shaped main case body 26 and a reinforcing frame 27 that connects the left and right walls 26b of the main case body 26 or the front and rear walls 26a of the main case body 26. An elastic body 42 that elastically supports the outer blade frame 37 is formed on the reinforcing frame 27 (Claim 1).

A plurality of outer blade cassettes 13 are arranged between the front and rear walls 26 a of the main case body 26 and the reinforcing frame 27. As shown in FIG. 9, a pair of left and right elastic bodies 42 for floatingly supporting the outer blade cassette 13 are integrally formed on the front and rear sides of the reinforcing frame 27, respectively.

  In each outer blade cassette 13, the three peripheral walls of the left and right side walls 37 b of the outer blade frame 37 and the front and rear walls 37 a facing the front and rear walls 26 a of the outer blade holder 12 are guided and supported by the outer blade holder 12 so as to be slidable up and down. As shown in FIG. 6, the elastic arm 44 of the elastic body 42 in the free state extends substantially horizontally (Claim 3).

  As shown in FIG. 4, an elongated engagement groove 40 that inherits the urging force of the elastic body 42 is formed in each of the outer blade frames 37 that are opposed to each other with the reinforcing frame 27 interposed therebetween. A protrusion 45 provided at the free end of the elastic arm 44 is engaged with the engagement groove 40 (Claim 4).

  In a state where the outer blade cassette 13 mounted on the outer blade holder 12 is pushed up by the inner blade 51 and restricted in movement by a stopper provided on the outer blade holder 12, the outer blade cassette 13 is pushed up and biased by the elastic body 42. (Claim 5).

  The center blade 11 is disposed between the pair of front and rear outer blade cassettes 13. A through hole 47 for the drive shaft 57 that drives the center blade 11 is formed in the left and right center of the reinforcing frame 27. The lower end of the spring 58 that pushes up and biases the center blade 11 is received and supported by a spring seat 48 provided on the reinforcing frame 27. The spring seat 48 is formed between the base 43 of the elastic arm 44 and the passage 47 (Claim 6).

In the present invention, since the outer blade cassette 13 is directly supported by the elastic body 42 provided on the outer blade holder 12 side, the initial elastic force of the elastic body 42 does not vary and the floating support structure of the outer blade cassette 13 is provided. It can be simplified. Moreover, since the elastic body 42 is formed including the left and right laterally long elastic arms 44 extending substantially parallel to the front and rear walls 26a of the outer blade holder 12, the spring characteristics of the elastic body 42 can be optimized by the length of the elastic arms 44. Specifically, the rate of change in elastic force when the elastic arm 44 is deformed by a certain amount can be reduced, and the outer blade cassette 13 can be moved and urged softly by that amount. Since the elastic arm 44 is formed along the longitudinal direction of the outer blade holder 12, the length of the elastic arm 44 can be set to a necessary and sufficient length, so that an elastic body 42 that is less susceptible to fatigue failure and excellent in durability can be obtained. benefits may form an elastic body 42 in a more molding die having a simple structure Ru mower.

A reinforcing frame 27 that connects the left and right walls 26b is provided on the inner surface of the main case body 26 constituting the outer blade holder 12, and a plurality of outer blade cassettes 13 are floated and supported on the front and rear sides of the reinforcing frame 27, respectively. When the elastic bodies 42 are provided in pairs on the left and right, the outer blade cassette 13 can be moved and urged by the cooperative action of the elastic body 42 and the reinforcing frame 27, so that the elastic force for moving and urging the outer blade cassette 13 can be further softened. Can be. In addition to simplifying the floating support structure, there is an advantage that the labor of assembling can be reduced as compared with the conventional electric shaver. When a large external force is applied, the reinforcing frame 27 can be elastically deformed to allow the external force to escape, so that excessive external force is applied to the elastic body 42 and the durability can be further improved. Since the left and right length of the elastic body 42 can be set to necessary and sufficient length, even when forming thick the elastic arm 44 for ensuring strength, Ru mower advantage of optimization of the spring characteristics of the elastic body 42.

In the electric razor in which the outer blade holder 12 is provided with a pair of front and rear outer blade cassettes 13, if the three peripheral walls of each outer blade cassette 13 are guided and supported by the outer blade holder 12, the outer blade cassette 13 is stably supported. The displacement can be guided in the vertical and horizontal directions, and the whiskers can be cut smoothly as much as there is no waste in the floating operation. If the elastic arms 44 of the elastic body 42 extend substantially horizontally in the free state, the elastic arms 44 can exert an elastic force in each of the upper and lower regions in the free state and move the outer blade cassette 13 with a softer elastic force. can urge floating structure tends to follow the changes in the skin surface outer blade cassette 13 is Ru obtained.

When the protrusion 45 provided at the free end of the elastic arm 44 is engaged and connected to the engagement groove 40 provided in the outer blade frame 37 to float and support the outer blade cassette 13, the protrusion 45 is interposed between the outer blade frame 37 and the elastic arm 44. Since the transmission of the external force and the elastic force can be performed smoothly without any loss, the outer blade cassette 13 can be compared with a floating support structure in which the lower end surface of the outer blade frame 37 is received by the free end of the elastic arm 44, for example. Smooth and quick return movement. Since the displacement limit of the elastic arm 44 can be limited to within the range of the engaging groove 40, Ru can be prevented that excessive external force acts on the elastic body 42.

When the outer blade cassette 13 pushed up by the inner blade 51 is restricted in movement by a stopper provided on the outer blade holder 12, if the outer blade cassette 13 is pushed up and biased by the elastic body 42, the outer blade cassette 13 The elastic body 42 exerts an elastic force in the direction of always pushing up, and the elastic force of the elastic body 42 increases as the sinking amount or tilting amount of the outer blade cassette 13 increases. Therefore, the outer blade cassette 13 pressed into the skin is increased. and promptly by return movement to the movement restriction has been waiting position by the stopper, Ru can be smoothly follow the changes in the skin surface.

When the lower end of the spring 58 that pushes up and urges the center blade 11 is received and supported by a spring seat 48 provided between the base portion 43 and the through hole 47 of the elastic arm 44, the elastic arm 44 and the spring 58 are brought into contact with each other and buffered. while preventing to, both members 44, 58 are aggregated disposed reinforcing frame 27, Ru simplifies the internal structure of the razor head.

  1 to 11 show an embodiment of an electric shaver according to the present invention. In FIG. 2, the electric razor is composed of a main body case 1 and an operation unit assembled to the main body case 1. A switch panel 2 is provided on the front surface of the main body case 1, and a switch knob 3 for starting the motor and an indicator lamp 4 for displaying the operation state are provided above and below the switch panel 2. Although not shown, on the back side of the main body case 1, a wrinkle blade unit is provided.

  The operation unit includes a lower half electrical component unit and a razor head provided on the upper part. The electrical component unit is configured by assembling a circuit board, a secondary battery 7, a motor 8, and the like to a plastic molded electrical component holder. On the circuit board, a switch that is switched by the switch knob 3 described above, electronic components that constitute a control circuit, LEDs, and the like are mounted. The electrical component unit is accommodated in the main body case 1 and sealed.

  As shown in FIG. 3, the razor head is provided with a pair of front and rear main blades 10, a center blade 11 disposed between the pair of main blades 10, a drive mechanism for driving them, and the like. The main blade 10 is composed of outer blade cassettes 13 and 13 that are floatingly supported by the outer blade holder 12, inner blade units 14 and 14 that reciprocally slide in contact with the outer blades 13 and 13, and the like. The center blade 11 includes an outer center blade 11a, an inner center blade 11b, and a blade receiving frame 15 that supports the outer center blade 11a.

  As shown in FIGS. 5 and 6, the outer blade holder 12 includes a pair of front and rear outer blade cassettes 13 and 13, an upper case 16 that supports the center blade 11, and a lower case 17 that supports the upper case 16. . The lower case 17 is made of a plastic product having a rectangular frame shape whose upper and lower surfaces are open. The lower case 17 is externally fitted to the head case 18 of the razor head, and is engaged and captured by lock claws 19 incorporated in the left and right ends of the head case 18. Is done.

  For this purpose, engaging recesses 20 that engage with the locking claws 19 are formed in the front and rear surfaces of the left and right side walls of the lower case 17. The lock claw 19 is formed integrally with the lock release button 21 and is urged to move in a direction in which the lock claw 19 is engaged with the recess 20 by a compression coil spring 22 shown in FIG. When the lock release button 21 is pushed against the spring 22, the lock claw 19 comes out of the engaging recess 20, so that the lower case 17 can be removed from the razor head. A pair of front and rear engagement protrusions 24 for engaging and capturing the upper case 16 are formed on the inner surfaces of the left and right side walls of the lower case 17, and the upper case 16 is positioned front and rear in the front and rear center of the left and right side walls facing the upper surface opening. Guide ribs 25 are formed (see FIG. 7).

  The upper case 16 is integrally formed with a rectangular frame-shaped main case body 26 whose upper and lower surfaces are open, and a reinforcing frame 27 that is provided in parallel with the front and rear walls 26a of the main case body 26 and connects the lower portions of the left and right side walls 26b. It consists of a plastic molded product. A longitudinal groove 28 that engages with the previous guide rib 25 is formed on the outer surface of the left and right side walls 26b of the main case body 26, and an engagement recess 29 that engages with the previous engagement protrusion 24 is formed on the lower and front sides thereof. It is.

  The front and rear outer blade cassettes 13 are supported by the upper case 16 so as to be slidable up and down. For this purpose, a pair of left and right guide walls 32 (see FIG. 6) are provided in the center of the inner surface of the front and rear walls 26a of the main case body 26, and guide protrusions 33 (see FIG. 8) are provided on the front and rear surfaces of the left and right side walls 26b of the main case body 26. ). A regulation wall 35 that regulates the upward movement of the outer blade cassette 13 is formed on the inner surface of the guide wall 32. A groove 34 is formed between the front and rear guide projections 33 to guide and support the center blade 11 so as to be slidable up and down.

  The outer blade cassette 13 includes an outer blade 36 made of a sheet-like mesh blade formed by an etching method or an electroforming method, and an outer blade frame 37 that holds the outer blade 36 in an arch shape. The outer blade frame 37 is made of a plastic molded product in which front and rear walls 37a and arch-shaped left and right side walls 37b are integrally formed, and a vertically long slide groove 38 that is guided and supported by the guide protrusion 33 is formed through the left and right side walls 37b. To do. As shown in FIG. 9, a slide protrusion 39 that is guided and supported by the previous guide wall 32 is formed on one of the front and rear walls 37a so as to protrude in the front-rear direction, and the other of the front and rear walls 37a is engaged with an elastic body to be described later. The engaging groove 40 is formed through. The engagement grooves 40 are formed in a long hole shape that is long on the left and right, and are formed at two locations near the left and right ends of the front and rear walls 37a (see FIG. 6).

  In order to float and support the front and rear outer blade cassettes 13 attached to the upper case 16, a pair of left and right elastic bodies 42 are integrally formed on the front and rear surfaces of the reinforcing frame 27 as shown in FIGS. ing. The elastic body 42 includes a base 43 that rises upward from the upper surface of the reinforcing frame 27, an elastic arm 44 that extends laterally continuously from the base 43, and a pin that projects in front of (or behind) the free end of the elastic arm 44. The elastic arm 44 in the free state extends in the horizontal direction and is parallel to the reinforcing frame 27 (see FIG. 6). Since the reinforcing frame 27 and the pair of front and rear elastic bodies 42 are formed integrally with the main case body 26, the structure for pushing up and urging the outer blade cassette 13 can be simplified, and the number of components and the number of assembly steps can be reduced accordingly. This can reduce the manufacturing cost of electric razors. By providing the reinforcing frame 27, the structural strength of the main case body 26 can be improved, and damage to the outer blade holder 12 due to a drop impact or the like can be well prevented.

  A through-hole 47 for the drive shaft 53 that drives the inner center blade 11b is formed in a vertically penetrating manner at the center of the left and right sides of the reinforcing frame 27, and spring seats 48 are recessed on the upper surface sides of the left and right ends. The spring seat 48 is provided for receiving the lower end of a spring 58 for the center blade 11 described later.

  In FIG. 4, the inner blade unit 14 includes an inner blade 51 formed of a slit blade and an inner blade frame 52 that supports the inner blade 51. The inner blade 51 is formed by press-molding a sheet-shaped inner blade blank formed by an etching method, and is different from the outer blade 36 in that a horseshoe-shaped cross-sectional shape can be self-held. A passive piece 55 that is engaged and connected to the drive shaft 54 of the vibrator 53 is integrally provided at the lower portion of the inner blade frame 51, and is a compression coil type interposed between the drive shaft 54 and the passive piece 55. The whole inner blade unit 14 is pushed upward and biased by the spring 56. The tension of the spring 56 is set sufficiently larger than the elastic force of the previous elastic body 42. Therefore, the entire inner blade unit 14 can always be brought into close contact with the outer blade 36 even though the inner blade unit 14 is supported by the drive shaft 54 so as to be vertically movable and tiltable to the left and right.

  The vibrator 53 converts the rotational power of the motor 8 into a reciprocating operation and transmits it to the inner blade unit 14 via the drive shaft 54, and simultaneously drives the inner center blade 11b to reciprocate with the drive shaft 57 provided separately (see FIG. 3). ). Between the inner center blade 11b and the reinforcing frame 27, a pair of left and right compression coil springs 58 (see FIG. 4) that push up and bias the inner center blade 11b are arranged. The vibrator 53 can transmit the reciprocating power to the saw blade unit by pushing up the slide knob of the saw blade from the standby position.

  The outer blade cassette 13 and the center blade 11 are assembled to the upper case 16 as described below. First, the spring 58 is assembled to the reinforcing frame 27, the center blade 11 is assembled to the upper case 16 from the upper surface side, and the blade receiving frame 15 is guided and supported by the groove 34 so as to be vertically slidable. Next, the front and rear outer cutter cassettes 13 are assembled between the front and rear walls 26a of the main case body 26 and the reinforcing frame 27. As shown in FIG. The main case body 26 is assembled so as to face the front and rear walls 26a. That is, the front outer blade cassette 13 has the slide projection 39 facing forward, and the rear outer blade cassette 13 is assembled into the upper case 16 from the upper surface side with the slide projection 39 facing rearward. The three peripheral walls of each outer blade frame 37 excluding the peripheral wall facing 27 are guided and supported by the guide protrusions 33 and the guide walls 32 so as to be slidable in the vertical direction. In this state, the projections 45 of the pair of left and right elastic bodies 42 are engaged with the left and right engagement grooves 40 of the outer blade frame 37 from the outer surface side, whereby the entire outer blade cassette 13 can be supported in a floating manner.

  The upper case 16 in the above state is engaged and attached to the lower case 17 from the upper surface side, and the outer blade holder 12 is assembled. The outer blade holder 12 is externally fitted to the head case 18 and is locked and held by the lock claw 19 so as not to be separated. In this mounted state, the inner blade unit 14 is pushed up by the spring 58 and is brought into close contact with the inner surface of the outer blade 36 to push up the outer blade cassette 13 to the advance limit position. At this time, the outer blade cassette 13 is held at the position where the lower end of the slide groove 38 is received by the guide protrusion 33 and at the same time, the slide protrusion 39 is received by the restriction wall 35 provided on the guide wall 32. That is, the guide protrusion 33 and the restriction wall 35 function as a stopper for defining the advance limit position of the outer blade cassette 13. In this state, the elastic arm 44 of the elastic body 42 is elastically deformed so that the projection 45 is positioned slightly below the base portion 43 as shown in FIG. 1, and therefore the outer blade cassette 13 is pushed up by the elastic body 42. It is energized.

  In the use state, the outer blade 36 is pressed against the skin, and the outer blade cassette 13 and the inner blade unit 14 are pressed down against the biasing force of the elastic body 42 and the spring 58 by the pressing reaction force. When the pressing force against the skin is released, the outer blade cassette 13 and the inner blade unit 14 are pushed up by the elasticity of the elastic body 42 and the spring 58, and return to the advance limit position.

  FIG. 12 shows another embodiment of the upper case 16. There, the front and rear walls 26 a of the main case body 26 are connected by a pair of left and right reinforcing frames 27, and elastic bodies 42 are integrally provided on the left and right side surfaces of each reinforcing frame 27. Since others are the same as the previous embodiment, the same reference numerals are assigned to the same members, and descriptions thereof are omitted. The same applies to the following embodiments. If necessary, the reinforcing frame 27 can be formed in a T shape in plan view.

  FIG. 13 shows still another embodiment of the outer blade holder 12. In this case, rib-shaped reinforcing frames 27 are integrally formed on the inner surfaces of the front and rear walls of the outer blade holder 12, and elastic bodies 42 are integrally formed on the opposing surfaces of the front and rear reinforcing frames 27. In this case, the outer blade holder 12 floats and supports the front and rear of one outer blade cassette 13 with four elastic bodies 42.

  In the above embodiment, the case where the outer blade holder 12 is constituted by the upper case 16 and the lower case 17 has been described. However, this is not necessary, and the outer blade holder 12 may be constituted by one independent component. it can. The elastic body 42 and the outer blade frame 37 need not be connected to the protrusion 45 via the engaging groove 40. For example, the free end of the elastic arm 44 can receive and support the lower end surface of the outer blade frame 37 to float and support the outer blade cassette 13. The groove center of the engagement groove 40 does not need to be horizontal, and can be tilted obliquely, or the groove can be formed in a curved shape. The base portion 43 of the elastic arm 44 can be provided at the left and right ends of the reinforcing frame 27, and the pair of elastic arms 44 can be provided in a left-right opposed manner. The protrusion 45 does not need to be formed in a pin shape, and can be formed in a rib shape.

  Two reinforcing frames 27 are provided between the front wall 26 a and the rear wall 26 b of the main case body 26, and the three outer blade cassettes 13 are arranged between the front and rear walls 26 a and 26 b and the reinforcing frame 27. Can do. In that case, the front and rear surfaces of the central outer blade cassette 13 can be elastically supported by the elastic bodies 42 provided on the opposing surfaces of the front and rear reinforcing frames 27. If necessary, either the front or back of the central outer blade cassette 13 is supported by a guide provided on one reinforcing frame 27 so that it can float up and down, and is elastically supported by an elastic body 42 provided on the other reinforcing frame 27. be able to.

It is a vertical front view of a razor head. It is a front view of an electric razor. It is a vertical side view of a razor head. It is a disassembled front view of the razor head which fractured | ruptured the outer blade holder. It is a disassembled perspective view of a razor head. It is a disassembled sectional view of an outer blade holder. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is the top view which isolate | separated the outer blade cassette and the upper case. It is a vertical side view of the state which assembled the outer blade cassette in the upper case. It is a cross-sectional top view of the state which assembled the outer blade cassette in the upper case. It is a top view which shows another Example of an upper case. It is a cross-sectional top view which shows another Example of an upper case.

Explanation of symbols

11 Center blade 12 Outer blade holder 13 Outer blade cassette 26 Main case body 26a Front and rear walls 26b Main case body left and right walls 27 Reinforcement frame 36 Outer blade 37 Outer blade frame 37a Outer blade frame front and rear wall 37b Outer blade frame Left and right side walls 40 engaging groove 42 elastic body 43 elastic arm base 44 elastic arm 45 protrusion 47 through port 48 spring seat 51 inner blade 57 drive shaft 58 spring

Claims (6)

The razor head is provided with an inner blade (51) and an outer blade cassette (13) circumscribing the inner blade (51), and the outer blade cassette (13) is an elastic body (42) provided on the outer blade holder (12). ) Floating razor,
The outer blade cassette (13) includes an arcuate outer blade (36) and an outer blade frame (37) that supports the outer blade (36).
A plurality of elastic bodies (42) for elastically supporting the outer blade frame (37) are integrally formed on the inner surface of the outer blade holder (12),
Elastic bodies (42), Ri to form include front and rear walls (26a) and extending substantially parallel lateral oblong elastic arms of the outer cutter holder (12) (44) tare,
The outer blade holder (12) connects the square frame-shaped main case body (26) and the left and right walls (26b) of the main case body (26) or the front and rear walls (26a) of the main case body (26). A reinforcing frame (27),
A reinforcing frame (27), an electric shaver, characterized in tare Rukoto elastic body outer blade frame (37) elastically supporting (42) is formed. A plurality of outer blade cassettes (13) are arranged between the front and rear walls (26a) of the main case body (26) and the reinforcing frame (27),
The electric razor according to claim 1, wherein a pair of left and right elastic bodies (42) for floatingly supporting the outer blade cassette (13) are integrally formed on the front and rear sides of the reinforcing frame (27). In each outer cutter cassette (13), the three peripheral walls of the left and right side walls (37b) of the outer cutter frame (37) and the front and rear walls (37a) facing the front and rear walls (26a) of the outer cutter holder (12) are The blade holder (12) is supported and slidable up and down.
The electric shaver according to claim 2, wherein the elastic arm (44) of the elastic body (42) in the free state extends substantially horizontally. An elongated groove-like engagement groove (40) that inherits the urging force of the elastic body (42) is formed in each of the outer blade frames (37) facing forward and backward with the reinforcing frame (27) interposed therebetween,
The electric shaver according to claim 2 or 3, wherein a protrusion (45) provided at the free end of the elastic arm (44) is engaged with the engagement groove (40). In the state where the outer blade cassette (13) mounted on the outer blade holder (12) is pushed up by the inner blade (51) and restricted in movement by a stopper provided on the outer blade holder (12),
The electric shaver according to claim 2, 3 or 4, wherein the outer blade cassette (13) is pushed up and biased by an elastic body (42). A center blade (11) is disposed between the pair of front and rear outer blade cassettes (13),
A through hole (47) for the drive shaft (57) for driving the center blade (11) is formed in the left and right center of the reinforcing frame (27).
The lower end of the spring (58) that pushes up and biases the center blade (11) is received and supported by a spring seat (48) provided on the reinforcing frame (27),
Said spring seat (48), an electric razor according to any one of claims 2 to 5 is formed between the base (43) and passing opening (47) of the elastic arm (44).

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