JP2831080B2 - Rotary electric razor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rotary electric shaver, and more particularly to an improved support structure for a rotary inner blade.

[Conventional technology]

As a rotary electric razor, for example,
As shown in Japanese Patent Publication No. 106171 and Japanese Utility Model Laid-Open Publication No. 57-72876, a cylinder type rotary inner blade which rotates in sliding contact with the inner surface of the outer blade is supported by left and right bearing stands. There is one that is supported in the main body case so that it can float vertically.

[Problems to be solved by the invention]

However, in the above-mentioned conventional example, the left bearing stand and the right bearing stand that support the rotary inner blade have a structure separated and independent from each other, and are merely connected via the rotary inner blade. Absent. For this reason, when the outer blade is pressed against or separated from the skin during shaving, a difference occurs in the floating amount of one of the left and right bearing stands and the floating amount of the other due to a change in the pressing position or the pressing force. , And a floating time lag such that one moves down before the other easily occurs. Due to the quantitative or temporal deviation of the floating between the left and right bearing stands, a twist occurs between the shafts at both ends of the rotary inner cutter and the bearing stand, which hinders rotation of the inner cutter, generates noise, Problems such as a decrease in sharpness due to inclination of the rotary inner blade with respect to the blade occur.

The present invention relates to a rotary electric shaver in which the rotary inner blade is incorporated so as to be able to float up and down as described above, by improving the structure of a pair of left and right bearing stands supporting the rotary inner blade. An object of the present invention is to prevent twisting around both end axes of the inner cutter and to prevent inclination of the rotary inner cutter.

[Means for solving the problem]

In the rotary electric shaver according to the present invention, an arch-shaped outer blade 55 is detachably mounted on the main body case 1 as shown in FIG. 1, and the inner blade drive unit 3 is vertically movable on the main body case 1. It is supported by.

The inner blade drive unit 3 includes a cylindrical rotary inner blade 4 that slides and rotates on the inner surface of the outer blade 55, a pair of left and right bearing stands 5 and 6 that support shafts 12 at both left and right ends of the rotary inner blade 4,
The chassis 7 supporting the left and right bearing stands 5 and 6 is integrally combined.

The chassis 7 includes left and right chassis 7a and 7b integrally connected to respective lower ends of the left and right bearing stands 5 and 6. The inner blade drive unit 3 is configured such that the upper ends of the left and right chassis 7a and 7b Are installed so as to protrude upward through left and right slits 35 provided at the bottom.

The motor 9 is provided below the upper wall 34 in the main body case 1, and the driving force of the motor 9 is applied to the chassis 7 by the rotary inner blade 4.
A drive transmission means 10 for transmitting power to the vehicle is mounted.

Below the rotary inner cutter 4, the two bearing stands 5 and 6 are integrally connected by a beam member 13 and assembled into a rigid structure. Above the upper wall 34 of the main body case 1, the rotary inner cutter 4 , A pair of left and right bearing stands 5 and 6, and a beam member
13 is characterized in that the three members are integrally moved up and down with respect to the main body case 1.

[Action]

The rigidized left and right bearing pedestals 5 and 6 change their shapes or tilt even when a strong pressing force is applied by the outer blade 55 receiving skin pressure or when they are accidentally dropped. In this case, the support of the rotary inner blade 4 is firm.

Further, when the outer blade 55 is pressed against or separated from the skin, a change in the pressing position or the pressing force causes a change in the amount of floating or time between the left and right bearing stands 5 and 6. Does not occur.

〔The invention's effect〕

According to the rotary electric shaver of the present invention, since the pair of left and right bearing stands 5 and 6 are integrally connected to each other by the beam member 13 to form a rigid structure, there is no twist around the both end shafts 12 of the rotary inner blade 4. As a result, the rotary inner blade 4 can always be rotated smoothly and quietly, and the inclination of the rotary inner blade 4 can be prevented, so that the sharpness can be improved. Further, it can sufficiently withstand an unexpected drop impact and the like, so that a stable and reliable support state of the rotary inner blade 4 can be ensured for a long period of time. In this respect, the occurrence of rotational runout can be advantageously prevented.

〔Example〕

An embodiment of a rotary electric shaver according to the present invention will be described with reference to the drawings.

In FIGS. 3 and 4, the main body case 1 is shown.
Are integrally connected with the front and rear cases 1a and 1b by screws 2 or the like.

The inner blade drive unit 3 is incorporated in the main body case 1. As shown in FIG. 1, the inner blade drive unit 3 supports a cylindrical rotary inner blade 4, a pair of left and right bearing stands 5 and 6 supporting the rotary inner blade 4, and supports the left and right bearing stands 5 and 6. And a motor 9 mounted on the chassis 7
And a drive transmitting means 10 for transmitting the rotation of the motor 9 to the rotary inner blade 4.

The rotary inner blade 4 cuts a spiral cutting blade 11 to both end surfaces 4a in the axial direction, and integrally protrudes a shaft 12 from each center of both right and left end surfaces. The entire surface of the rotary inner blade 4 including the shafts 12 at both ends thereof is subjected to a surface gloss treatment with a ceramic coating such as TiN to reduce the adhesion of fuzz and to give the shaft 12 slipperiness.

The shafts 12 at the left and right ends of the rotary inner blade 4 are mounted on the left and right bearing stands 5.
6 is supported. The left and right bearing stands 5 and 6 are made of a rigid material such as zinc die cast, brass metal, etc.
The beam members 13 made of the same rigid material are used for the bearing blocks 5 and 6.
And integrated into a rigid structure. That is, as shown in FIG.
6 comprises frame-like beam members 13a and 13b projecting horizontally and integrally from the lower ends, respectively. The beam members 13a and 13b are overlapped with each other and integrally connected to each other to form the left and right bearing bases 5. -Six are assembled into a rigid structure with their axes aligned.

As shown in FIG. 8, the chassis 7 is
A U-shaped front view of a plastic left and right chassis 7a and 7b integrally connected to each lower end of the plastic chassis 6 and a plastic bottom chassis 7c that integrally connects the lower ends of the left and right chassis 7a and 7b. Assembled into shape.

A motor 9 is integrally mounted with a motor holder 14 below the bottom chassis 7c of the chassis 7.

The drive transmission means 10 mounted on the chassis 7 is, as shown in FIG.
The output gear 16 is fixed to the output shaft 15 protruding above the bottom chassis 7c, and the left and right chassis 7a
The connecting shaft 17 is rotatably supported between 7b, and the face gear 19 fixed to the axial center of the connecting shaft 17 is connected to the output gear 16.
And a gear fixed orthogonally to the left end of the connecting shaft 17
20 meshes with a multi-stage gear 21 housed in the left chassis 7a.

A gear 23a fixed on the left shaft 12 of the rotary inner blade 4 and a gear 23b meshing with the gear 23a are incorporated on the outer side of the left bearing stand 5 and two upper and lower gears are mounted. With the lower gear 23b facing the multi-stage gear 2
It meshes with the top gear of 1. Therefore, the rotation of the motor 9 is transmitted to the rotary inner blade 4 via the connecting shaft 17, the multi-stage gear 21, and the gears 23a and 23b.

Next, an example of an assembling order of the inner blade drive unit 3 having the above structure will be described.

First, as shown in FIG. 7, a connecting shaft 17 is installed between the left and right chassis 7a and 7b, the multi-stage gear 21 is incorporated in the left chassis 7a, and the right bearing base 6 is welded to the upper end of the right chassis 7b by swaging or the like. At the same time, the tip of the beam member 13b protruding from the bearing base 6 is integrally joined to the upper end of the left chassis 7a by swaging or the like. At the lower part of the right bearing base 6, as shown in FIG. 10, there is formed a coupling hole 24 into which the tip of the beam member 13a is inserted and supported so that it can be inserted and removed. Outside the right bearing base 6 and the right chassis 7b, the tip of the beam member 13a
An inner blade removal plate 25 that locks so as not to fall out of 4 is mounted slidably up and down. A lock claw 26 that engages with and disengages from the tip of the beam member 13a is integrally protruded from the inner surface of the inner blade removal plate 25. The inner blade removing plate 25 is always urged upward by a spring 27 so as to maintain the engagement state in which the lock claw 26 engages with the tip of the beam member 13a from below. Thus, the assembly of the upper assembly of the inner blade drive unit 3 is completed.

Also, as shown in FIG. 7, the motor holder 14 is superimposed on the lower side of the bottom chassis 7c and integrally joined with screws 29,
The motor 9 is mounted on the motor holder 14 with the
Hold together with 29. Further, a vibrator 69 is incorporated between the bottom chassis 7c and the motor holder 14. This vibrator 69
Is a movable comb blade 63 for shaving which will be described later.
(See FIG. 4). As shown in FIG. 6, the front end thereof has a claw portion 70 which engages with the drive piece 64 (see FIG. 4) on the movable comb blade 63 side, and A longitudinally long hole 72 that fits into the eccentric cam 71 on the output shaft 15 at the front and rear middle.
And a hole 74 at the rear end for fitting into a pin 73 protruding from the upper surface of the motor holder 14. Therefore,
The vibrator 69 swings about the pin 73 in response to the rotation of the eccentric cam 71. The motor holder 14
In order to reduce the friction with the upper surface, a small projection 76 is provided on the upper surface, and the vibrator 69 is mounted thereon. The vibrator 69 is compactly housed in the concave portion 75 on the bottom side of the bottom chassis 7c so as not to hinder the swinging motion (see FIG. 9). This completes the assembly of the lower assembly of the inner blade drive unit 3.

Then, as shown in FIG. 8, the lower ends of the left and right chassis 7a and 7b of the upper set of the inner blade drive unit 3 are placed on the upper side of the lower chassis 7c of the lower set and tightened with screws 30, so that the left and right chassis 7a and 7a. The lower ends of 7b are integrally connected by a bottom chassis 7c. The screw 33 is tightened from above the inside of the frame-shaped beam member 13b.

As shown in FIGS. 3 and 8, the left shaft 12 of the rotary inner blade 4 is supported on the left bearing base 5 via the bearing metal 31, and gears 23a and 23b are provided outside the left bearing base 5. At the same time, the gear cover 22 is mounted and the inner blade assembly is completed.

Finally, as shown in FIGS. 8 and 10, the right shaft 12 of the rotary inner cutter 4 is inserted into and supported by the right bearing base 6, and
The left bearing stand 5 is mounted on the upper end of the left chassis 7a and removably integrated. At this time, the tip of the beam member 13a of the left bearing stand 5 of the rotary inner blade 4 is inserted into a guide groove 32 provided on the inner surface of the beam member 13b of the right bearing stand 6 as shown in FIG. As a result, the right shaft 12 is inserted into the bearing metal 33 in the right bearing stand 6 as shown by a two-dot chain line in FIG.
To be inserted. When the tip of the beam member 13a is inserted into the coupling hole 24, the tip abuts against the taper of the lock claw 26 of the inner blade removal plate 25, and the removal plate 25 is once pressed down against the spring 27, thereby lowering the beam member 13a. When the tip of the beam member 13 passes over the lock claw 26, the release plate 25 is automatically moved upward by the spring 27, and the lock claw 26 is engaged with the inside of the tip of the beam member 13 to be locked. As shown in FIG. 3, the left bearing stand 5 and the gear cover 22 are connected to the left chassis 7a.
Is fixed at the upper end of the drive transmission means 1
A state in which the zero-stage multi-stage gear 21 meshes with the uppermost stage gear is obtained.

By locking the tip of the beam member 13a with the lock claw 26 of the inner blade removing plate 25 in this manner, the left and right bearing stands 5, 6 are integrally and firmly connected to each other by the beam members 13a, 13b to be rigid. You.

Thus, the inner blade drive unit 3 thus assembled is, as shown in FIG. 3 and FIG.
Between the front and rear cases 1a and 1b.

At this time, the inner blade drive unit 3 includes the left and right chassis 7a
The upper end of 7b is assembled so as to protrude upward from the left and right slits 35 of the upper wall 34 of the front and rear cases 1a and 1b. The gap between the left and right chassis 7a, 7b and each slit 35 is closed in advance by a flexible hair penetration preventing rubber 36 provided in each chassis 7a, 7b.

The inner blade drive unit 3 has front and rear support arms 37, which are elastically deformable only in the vertical direction from the left and right ends of the plastic motor holder 14, and are integrally and horizontally protruded in the horizontal direction. Connect the tip 37a of the arm 37 to the front and rear cases 1a and 1
The entire inner blade drive unit 3 is supported so as to be able to float in the vertical direction via the elastic deformation of the left and right support arms 37 by being engaged and fixed to the concave portion 39 provided in each inner wall of b. A compression spring 41 is interposed between the bottom side of the bottom chassis 7c and a spring receiver 40 fixed to the main body case 1 so as to correspond to the lower side of the bottom chassis 7c. Push upward to urge.

3 and 4, between the motor 9 and the inner surface of the main body case 1, there is provided a vertical movement guide means for regulating the movement of the inner blade drive unit 3 in the front-rear and left-right directions. The front and rear cases 1a and 1b
From the respective inner surfaces of the front and rear position restricting ribs 42, and guides the motor 9 between the front and rear front and rear position restricting ribs 42 to restrict the entire inner blade drive unit 3 from moving in the front and rear direction. . Also, while forming a vertically long circular concave portion 43 on the inner surface of the rear case 1b, a pin 44 protrudes from the motor holder 14,
The pin 44 is fitted into the recess 43 so as to be slidable only in the vertical direction, so that the movement of the inner blade drive unit 3 in the left-right direction is also ensured. By aligning the axis of the motor 9 with the center of gravity of the inner blade drive unit 3 as shown in FIG. 1, the force (weight distribution) applied to the left and right support arms 37 in the assembled state to the main body case 1 ) Are equalized so that the inner blade drive unit 3 can float in a well-balanced manner.

A pair of front and rear circuit boards 45 and 46 disposed before and after the motor 9 and two rechargeable batteries 47 such as nickel cadres located on the left and right sides of the motor 9 are incorporated in the lower half of the main body case 1. .

As shown in FIG. 4, the rotary inner blade 4 of the main body case 1 is provided.
A lint storage chamber 51 for storing lint falling from the inner blade 4 is formed below the inner blade 4. The lint storage chamber 51 is provided with a shutter 53 for opening and closing the discharge port 52 and a scraping blade 54 for scraping lint to the discharge port 52 in conjunction with the opening and rotating operation of the shutter 53.

In FIGS. 3, 4 and 11, the main body case 1
A mesh-shaped outer blade 55 is attached to the upper part of the upper part by being curved in an arch shape through a holder 56 of the outer blade 55. Outer blade holder 56
Consists of an inner holder 56a and an outer holder 56b which is detachably superposed on the outer side of the inner holder 56a as shown in FIG.
Is sandwiched between the mating surfaces of the inner and outer holders 56a and 56b. No.
As shown in FIG. 12, a fixed rear end 55b of the outer blade 55 is swaged and welded to the outer wall of the inner holder 56a, and a movable front end 55a of the outer blade 55 is in front of the inner holder 56 as shown in FIG. The outer blade 55 is always pulled toward the movable front end 55a by being connected to a support plate 57 attached to the wall via a zigzag spring 58.

Therefore, when the outer blade 55 is pressed against the skin, the outer blade 55 contracts and deforms the spring 58 and moves downward.When the outer blade 55 is separated from the skin, the outer blade 55 is raised by the expansion restoring force of the spring 58. Move and return.

The left and right wall portions of the inner holder 56a are engaged and held by knob-equipped locking claws 60 mounted on the left and right upper ends of the main body case 1 via springs 59 so as to be freely retractable. Therefore, in FIG. 3, when the locking pawls 60 with the left and right knobs are pushed in against the spring 59, the outer blade 55 can be removed from the main body case 1 together with the outer blade holder 56.

The synergistic effect of the spring 58 that pulls the outer cutter 55 and the compression spring 41 that pushes up the entire inner cutter drive unit 3 improves the adhesion between the outer cutter 55 and the rotary inner cutter 4.

In FIG. 3, the rotary inner blade 4 cuts the cutting edge 11 to the left and right end surfaces 4a as described above in order to make the effective length of the spiral cutting edge 11 as long as possible. In such a case, the left and right ends of the cutting blade 11 may scratch and break the outer blade 55. Therefore, as shown in FIG. 3 and FIG. 12, the upper ends of the arcs of the bearing pedestals 5 and 6 and the outer periphery of the rotary inner blade 4 are made substantially flush. That is, the curvature of the arc at the upper end of each arc of the bearing pedestals 5 and 6 and the curvature of the imaginary cutting edge arc connecting the cutting edges of the cutting edges 11 of the rotary inner cutter 4 are made substantially the same. Height and cutting edge of rotary inner blade 4
The height of the top of 11 is almost the same. Then, the left and right end surfaces 4a of the rotary inner blade 4 are mounted in the state where the rotary inner blade 4 is mounted.
And the inner surfaces of the bearing pedestals 5 and 6 are closely opposed to each other, and in this state, the left and right ends of the outer cutter 55 are received at the upper ends of the respective arcs of the bearing pedestals 5 and 6. The edge 6a of the right bearing stand 6 is chamfered, and the edge 22a of the gear cover 22 of the left bearing stand 5 is chamfered.
The outer blade 55 is also prevented from being caught on the edges 6a and 22a.

The rotary inner blade 4 has, for example, a diameter of an imaginary cutting edge circle connecting the cutting edges of the cutting edges 11 of 10 mm, and the number of the cutting edges 11 is
By setting the lead angle of 12 teeth and cutting blade 11 to 20 degrees,
Even when the outer blade 55 is pressed against the skin in a state where the rotary inner blade 4 is elastically contacted with the inner surface of the outer blade 55, the outer blade 55 is not
It will not fall into the groove between them and be damaged.

In FIG. 4, a switch case 61 is mounted on the outer surface of the front case 1a so as to be slidable vertically.
A fixed comb blade 62 and a movable comb blade 63 for shaving are provided at the upper portion on the inner surface side of the switch case 61 so that each blade edge protrudes upward, and is transmitted to the movable comb blade 63 by inheriting the motor output. A drive piece 64 is provided. As shown in FIGS. 5 and 13, the switch case 61 includes a front case 1a.
Is integrated with the moderating plate 65 disposed on the inner surface side of the boss. The moderating plate 65 is a switch leaf spring 66 which comes into contact with and separates from the switch terminals on the circuit board 45 as the switch case 61 slides up and down.
And a moderation arm 68 that is detachable from a moderation projection 67 protruding from the inner surface of the front case 1a. Its moderation protrusion 67
As shown in FIG. 13, the front-rear position regulating ribs 42 projecting from the inner surface of the front case 1a are formed in an arc shape when viewed from the front, and three of them are provided in a vertical direction. It has a structure that also serves as the moderation projection 67 and the moderation projection 67. However, the moderation protrusion 67 may be provided separately from the front / rear position regulating rib 42.

Thus, the switch case 61 sequentially engages the moderating arm 68 with the moderating projection 67 in a stepwise manner, thereby lowering the standby position (switch-off position) indicated by a solid line in FIG. Position (switch-on position)
And the drive piece 64 for shaving is further advanced to the motor 9
Movable comb blade engaged with the claw 70 of the vibrator 69 on the output shaft 15
A driving force is transmitted to 63, a first upper projecting use position in which the movable comb blade 63 and the fixed comb blade 62 are used in combination with the rotary inner blade 4 and the outer blade 55 for shaving, and The upper and lower shaving blades (movable comb blade 63 and fixed comb blade 62) are positioned and held at the second upwardly protruding use positions, respectively. In Figure 4, the moving stroke of the motor start position from the lower standby position of the switch case 61 is the sign S _1, also movement stroke from the motor starting position to the first upper projecting use position is the sign S _2, yet a movement stroke from 1 upwardly projecting use position to the second upwardly projecting use position are respectively by reference numeral S _3.

As shown in FIG. 14, when the rotary inner blade 4 and the outer blade 55 for shaving are used in combination, first, long hair is shaved first with a fixed comb blade 62 and a movable comb blade 63 for sharp shaving. Subsequently, the hair is further shaved with the outer blade 55 and the rotary inner blade 4.

When removing the rotary inner blade 4 for cleaning or replacing it with a new one, the outer blade 55 is attached to the holder 56.
When both are removed from the upper part of the main body case 1 and the inner blade removing plate 25 is pulled down against the spring 27, the lock claw 26 is pulled out from the inside of the tip of the beam member 13a, and the rotary inner blade 4 and the left By sliding the bearing base 13a rightward, the rotary inner blade 4 can be removed from the right bearing base 6.

3, 4, 15 and 16, a plug unit 90 of a charging and alternating current type is mounted on the bottom side of the main body case 1. This plug unit 90
As shown in the figure, a plug board 111 sandwiched and fixed between the front and rear cases 1a and 1b, and a fixed socket 94 fixed to the lower surface side of the plug board 111 and capable of supplying power via a power cord.
And a movable plug 95 for charging, which is slidably mounted on the lower surface of the substrate 111 in the left-right direction and can be inserted into a wall outlet or the like. The fixed socket 94 and the movable plug 95 are alternatively usable.

Plug outlet 96 on the right side of the bottom of the front and rear cases 1a and 1b
And an operation groove 97 is opened on the bottom surface thereof. The plug outlet 96 is the plug outlet on the right side of the front and rear cases 1a and 1b.
Plug cover 98 slidably mounted vertically above 96
It can be opened and closed. The corners of the front and rear cases 1a and 1b on the side having the plug outlet 96 are formed in a curved cross section that is rounded up and down and in the front and rear direction, and the lower end of the plug cover 98 is also formed of the front and rear cases 1a and 1b. It is formed in a rounded shape corresponding to the shape of the corner (see FIGS. 15 and 16). Therefore, even if the body case 1 is squeezed strongly, the palm will not be damaged at the corner.

In FIGS. 15 and 16, on the lower surface of the plug substrate 111, a U-shaped plug blade holder 101 in plan view as shown in FIG. It is slidably assembled by a predetermined stroke. The plug blade holder 101
a front and rear hooks 104 each having a plug blade insertion hole 102 and hook engagement grooves 103 on the front and rear side surfaces thereof, and the front and rear hook engagement grooves 103 protruding downward from the front and rear ends of the plug substrate 111. Is slidably engaged with.

As shown in FIG. 19, the movable plug 95 has a pair of front and rear plug blades 99 and a blade base 100 integrally connected to a base end thereof. As shown in FIG. 16, the movable plug 95 allows the plug blade 99 to be inserted into the plug blade insertion hole 102 of the plug blade holder 101 by straddling the plug blade 99 on both front and rear sides of the fixed socket 94,
Front and rear projection holes 91 projecting from the front and rear sides of the blade base 100 and front and rear guide holes 92 opened in the front and rear side walls of the plug blade holder 101.
Has been fitted. An operation knob 105 is provided on the bottom side of the blade base 100.
The operation knob 105 is always urged downward by a spring 112, and the operation knob 105
5 and is freely slidable in the left-right direction, and is also freely disengageable from the recesses 106 and 107 provided at the left and right end positions of the operation groove 97, respectively. The recesses 106 and 107
19 is provided on a guide plate 113 for guiding the movable plug 95 in the operation groove 97, which is integrally extended from the fixed socket 94 as shown in FIG.

As shown in FIGS. 15 and 16, when the operation knob 105 is engaged with the concave portion 107 at the left end of the operation groove 97, the movable plug 95 moves the plug blade 99 and the plug blade holder 101 out of the plug. It is in a state of being retracted and stored inside the mouth 96.

Now, when the plug cover 98 is slid upward to open the plug outlet 96, the operation knob 105 is disengaged from the left end recess 107, and then slid rightward along the operation groove 97. The plug blade 99 protrudes from the plug blade insertion hole 102 and the plug outlet 96 until the projection 91 hits the right end wall in the guide hole 92.

When the operation knob 105 is further slid rightward until it engages with the concave portion 106 at the right end of the operation groove 97, the projection 91 pushes the right end wall in the guide hole 92, and the plug blade holder 101 is moved in that direction. Move with the plug blade 99 to the first
As shown in FIGS. 7 and 18, the plug blade 99 protrudes from the plug outlet 96 by a predetermined amount, and the tip 101a of the plug blade holder 101 also protrudes from the plug outlet 96. When the plug blade holder 101 protrudes, its flat tip 101
“a” is set so as to be linear with a straight line portion S that continues above the rounded portion R at the corner of the curved section of the main body case 1. At this time, the plug blade holder 101 and the movable plug 9
5 is locked by the operation knob 105 engaging with the concave portion 106.

Therefore, even when the plug blade 99 is protruded from the plug outlet 96 at the corner of the curved section during charging, the tip 101a of the plug blade holder 101 is connected to an outlet K such as a wall (see a two-dot chain line in FIG. 17). An interview can be performed, and a stable and reliable charging posture can be achieved.

Further, when charging is performed using the movable plug 95, the fixed socket 94 is closed by a socket cover 108 integrally formed on the bottom side of the blade base 100.

Then, in order to retract the movable plug 95 into the plug outlet 96, the operation knob 105 may be slid in the groove 97 until the operation knob 105 engages with the concave portion 107 at the left end of the operation groove 97. .

By combining the above-described components shown in FIG. 19, that is, the plug board 111, the plug blade holder 101, the fixed socket 94, the movable plug 95, and the operation knob 105, as shown in FIG. Plug unit
90 is completed, and in this state it becomes a part. In the state of the assembled parts, the operation of the operating knob 105 causes the movable plug 95 to protrude and retract, and the plug blade holder 101 to protrude and retract before the assembly into the main body case 1. It is possible to check in advance whether it can be performed normally.

(Another embodiment)

In the above embodiment, in order to make the rotary inner blade 4 easy to be attached and detached, the rigid body is integrally connected with the beam member 13 so that the left and right bearing stands 5 and 6 can be separated. However, the present invention is not limited to this. The bearing members 5 and 6 and the beam member 13 may be integrally formed of a rigid material such as metal to form a rigid body.

As a material for providing rigidity to these bearing stands 5 and 6 and the beam member 13, instead of metal or metal die-cast,
Glass beads, iron powder, or reinforced plastics such as plastics containing stainless steel powder may be used.

Further, in the above embodiment, the motor 9 and the drive transmission means 10 are allowed to float up and down together with the rotary inner blade 4, but instead, the motor 9 is fixed to the main body case 1 side, and the rotary inner blade 4, Only the left and right bearing pedestals 5 and 6 and the beam member 13 may be allowed to float freely, and the two may be connected by belt transmission instead of gear transmission.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing a main part of a rotary electric shaver according to the present invention, FIGS. 2 to 19 show one embodiment of the present invention, and FIG. 2 is a perspective view of the whole. 3 is an overall longitudinal front view, FIG. 4 is an overall longitudinal side view, FIG. 5 is an overall exploded perspective view, FIG. 6 is an exploded perspective view of a lower assembly of the inner blade drive unit, FIG. 7 is a perspective view showing an upper assembly and a lower assembly of the inner blade drive unit in a separated state, FIG. 8 is a perspective view showing the inner blade drive unit and a rotary inner blade in a separated state, and FIG. FIG. 10 is a cross-sectional view taken along the line AA in FIG. 10, FIG. 10 is a cross-sectional view showing the process of mounting the rotary inner blade, FIG. 11 is an exploded perspective view of the outer blade, FIG. FIG. 13 is a cross-sectional view taken along the line CC in FIG. 4, FIG. 14 is a side view showing an example of a shaving mode, and FIG. FIG. 16 is a vertical sectional front view of the bottom of the main body case shown in FIG. 15, FIG. 16 is a cross-sectional view taken along the line DD in FIG. 15, FIG. Is a sectional view taken along line EE in FIG. 17, and FIG. 19 is an exploded perspective view of the plug unit. 1 ... Main body case, 4 ... Rotary inner blade, 5.6 ... Left and right bearing stand, 13 ... Beam member, 55 ... Outer blade.

Claims (1)

(57) [Claims] An arcuate outer blade (55) is provided on a main body case (1).
The inner blade drive unit (3) is supported on the main body case (1) so as to be freely floatable in the vertical direction. The inner blade drive unit (3) is mounted on the inner surface of the outer blade (55). A cylindrical inner rotary blade (4) that slides and rotates with respect to the shaft; a pair of left and right bearing stands (5 and 6) that support shafts (12) at both left and right ends of the rotary inner blade (4); The left and right chassis (7a, 7b) integrally connected to the lower ends of the left and right bearing stands (5.6) are integrally combined with a chassis (7) supporting the (5, 6). The upper edge of the left and right chassis (7a, 7b) protrudes upward through left and right slits (35) provided in the upper wall (34) of the main body case (1). The motor (9) is provided below the upper wall (34) in the main body case (1). A drive transmission means (10) for transmitting the driving force of the motor (9) to the rotary inner blade (4) is mounted on the chassis (7), and a double bearing stand is provided below the rotary inner blade (4). (5.
6) The two members are integrally connected by a beam member (13) and are assembled into a rigid structure. Above the upper wall (34) of the main body case (1), a rotary inner blade (4) and a pair of right and left A rotary electric shaver, characterized in that the bearing stand (5, 6) and the beam member (13) move up and down with respect to the main body case (1) integrally.