JPH07284578A - Rotary electric razor - Google Patents

Abstract

PURPOSE:To improve the rigidity of left and right supporting frames for supporting an inner blade, to stably and surely transmit driving from a driving motor to the inner blade and to maintain the degree of parallelization between both the bearings of the inner blade. CONSTITUTION:Left and right supporting frames 40 and 41 are molded by plastic materials for reducing weight and cost. However, the supporting frames 40 and 41 molded by plastic are infererior to holding or twisting rigidity. Then, the rigidity of the supporting frames 40 and 41 is compensated by utilizing a driving motor 44 of a rigid body as the driving source of an inner blade 2. Therefore, motor holding cylinders 49 and 50 are integrally molded at the supporting frames 40 and 41, and the supporting frames 40 and 41 are integrally coupled by tapping screws 58 while integrally holding the driving motor 44 in the lateral posture between these motor holding cylinders 49 and 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric shaver having a cylinder type inner blade.

[0002]

2. Description of the Related Art A rotary electric shaver, like other rotary or reciprocating electric shavers, has a rotary inner blade that is used when the outer blade is pressed against or separated from the skin during shaving. In order to improve the sharpness, it is necessary to keep the outer blade up and down so as to keep it in close contact with the inner surface of the outer blade and to follow the vertical movement of the outer blade.

As described above, as means for arranging the inner blade of the rotary electric shaver so as to be vertically movable, the inner blade, the pair of left and right support frames for supporting the inner blade, the drive motor, and the rotation of the drive motor are transmitted to the inner blade. There is one in which four drive transmission means are integrally combined to form a drive unit, and the drive unit is provided so as to be vertically movable with respect to the main body case (for example, Japanese Patent Laid-Open No. 3-140184).
There, since the drive motor is mounted in a vertical posture with respect to the pair of left and right support frames that support the inner blade, both the drive motor shaft and the inner blade shaft are orthogonal to each other, and the motion transmission between the two shafts is performed. It is necessary to use a gear mechanism that turns in a right angle direction.

On the other hand, there is one in which a drive motor is mounted in a lateral posture with respect to a pair of left and right support frames for supporting the inner blade (Japanese Patent Laid-Open No. 2-131793). According to this, since the shaft of the inner blade and the shaft of the drive motor can be arranged in parallel to each other, a gear mechanism that changes the direction perpendicular to the motion transmission between the shafts, such as a drive motor mounted in a vertical position. Is unnecessary, the number of motion transmission gears between both shafts can be reduced, and there is an advantage that it can be compactly incorporated in the main body case.

[0005]

However, in the above rotary type electric shaver in which the drive motor is mounted in the lateral position, the motor holding cylinder, which is a separate body, is provided on the inner surface side of one of the left and right support frames. It is mounted and the drive motor is cantilevered by this motor holding cylinder. The left and right support frames are integrally connected to each other by connecting a long stay protruding from the inner surface of the one support frame to the other support frame with a screw. Therefore, even if the long stay is slightly bent, the parallelism between the inner blade bearings is likely to be out of order, which causes a reduction in sharpness. Further, since the drive motor is held in a cantilever manner, rattling or wobbling easily occurs between the shaft of the drive motor and the drive transmission gear, which may hinder smooth drive transmission. In this case, it is conceivable to utilize the rigidity of the drive motor itself in order to increase the rigidity of the drive unit. However, the drive motor is held by only one support frame and held by the other support frame. Therefore, it cannot be said that the rigidity of the drive motor itself is sufficiently useful for increasing the rigidity of the drive unit. Furthermore, since the support frame and the motor holding cylinder are composed of separate members,
The cost is high, and the assembly work is inferior because of the time and effort required to integrally connect the both.

It is an object of the present invention to provide a rotary electric shaver in which the drive motors are mounted on the left and right support frames in a horizontal position as described above, and the left and right support frames are lighter and less expensive than metal materials. By molding with a plastic material, the rigidity of the drive motor itself can be used in this case to increase the rigidity of the drive unit, thus ensuring parallelism between the inner blade bearings and smoothness of drive transmission. The point is to further improve the assemblability.

[0007]

A rotary electric shaver on which the present invention is based has a main body case 1 as shown in the drawings.
Is provided with an arch-shaped outer blade 3, a cylinder-type inner blade 2 that rotates in sliding contact with the inner surface of the outer blade 3 about the horizontal axis, and a drive unit 47 for the inner blade 2. A pair of facing left and right support frames 40, 41, a drive motor 44, and a drive transmission means 45 for transmitting the rotational force of the drive motor 44 to the inner blade 2 are integrally combined. In addition, the present invention is based on the left and right support frames 4
Numerals 0 and 41 are formed of plastic material, and motor holding cylinders 49 and 50 are integrally formed on the inner wall surfaces of the supporting frames 40 so as to face each other. Forming the accommodating portion 61 to be arranged, the drive unit 47 includes the left and right support frames 40.4.
1 is a drive motor 4 for each motor holding cylinder 49/50.
4 are laterally held together and are integrally coupled to each other, and the inner blade 2 is supported between the upper ends of the left and right support frames 40 and 41 via bearings 42 and 43. Drive unit 47,
The inner blade 2 projects upward from the main body case 1 so that the drive motor 44 is housed inside the main body case 1.
It is characterized in that it is supported so as to be able to float vertically. It is more preferable that the portions of the left and right support frames 40 and 41 projecting upwardly and outwardly of the body case 1 directly below the inner blade 2 are integrally connected by a beam member 64 made of a rigid material.

[0008]

The left and right support frames 40, 41 are the drive motor 4 which is a rigid body between the motor holding cylinders 49, 50 integrated with them.
Since the four are integrally held and connected to each other, the bending and twisting of the left and right support frames 40 and 41 can be prevented by the rigidity of the drive motor 44. Therefore, the drive motor 44
There is no dimensional change due to rattling or wobbling between the shaft 59 and the drive transmission means 45, and the dimensional stability between them is excellent, and drive transmission from the drive motor 44 to the inner blade 2 can be performed reliably and reliably. Further, the dimensional stability is excellent between the bearings 42 and 43 of the support frames 40 and 41, and both bearings 42 and 43 of the inner blade 2 are
The parallelism between them can be maintained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rotary electric shaver according to the present invention will be described with reference to the drawings. 2 to 4, the electric shaver has a structure in which a cutting head 4 including a rotary inner blade 2 and a mesh-shaped outer blade 3 is provided on an upper portion of a main body case 1. The bottom of the body case 1 is provided with a plug 6 of both charging and AC types.

In FIGS. 5 and 9, the main body case 1 is made by abutting the front and rear cases 1a and 1b made of plastic, and integrally joined with the upper and lower tightening screws 5. As shown in FIGS. 5 and 10, a front panel 7 for makeup is provided on the outer surface of the front case 1a, and a power switch button 9 is provided at a lower standby position (switch-off position) shown by a solid line in FIG. It is mounted so that it can be slid up and down over the motor starting position (switch-on position) one step higher. The switch button 9 is integrally connected with a switch operating plate 10 arranged along the inner surface of the front case 1a, and a leaf spring 10a provided on the switch operating plate 10 is provided in the main body case 1 by vertically sliding the switch button 9. The terminals of the drive circuit on the circuit board 11 are opened and closed. The circuit board 11 is equipped with a rechargeable battery 12 such as a nicad, a plug 6, and the like.

On the other hand, as shown in FIGS. 5 and 11, a rear panel 13 for makeup is provided on the outer surface of the rear case 1b, and a shaving unit 14 is provided on the upper portion thereof, and the unit 14 is projected around a support shaft 15. An upper and lower slide type shaving operation button 16 for switching between a use posture and a retracted storage posture is arranged vertically and provided.

As shown in FIGS. 5 and 11, the convex portion or the like formed on the lower portion of the rear case 1b is provided with a marking such as a lot number, a manufacturing type name, a manufacturer's name, etc., by marking or printing. The display section 17 is exposed to the outside through a window section 18 provided in the lower portion of the rear panel 13. By configuring the rear wall structure of the main body case 1 with the rear case 1b and the rear panel 13 in this way, even when the rear panel 13 is formed of an expensive material and the rear case 1b is replaced for repair or repair, The expensive rear panel 13 can be used as it is, and when the rear panel 13 is plated on its surface, it becomes impossible or difficult to engrave or print the above-mentioned display, but it is also possible to cope with such cases. It is possible and advantageous.

The outer blade 3 is removably attached to the upper portion of the main body case 1 with an outer blade holder 19. As shown in FIG. 14, the outer blade 3 is bent in an arch shape along the inner blade 2 inside the outer blade holder 19 and is held and fixed to the outer blade frame 20. As shown in FIG. 12, the outer cutter frame 20 includes front and rear frame portions 20c and 20d that are opposed to each other and connect the left and right frame portions 20a and 20b to the front lower portions and the rear lower portions of the left and right frame portions 20a and 20b, respectively. Is formed into a rectangular frame shape. The outer blade 3 is bent in an arch shape, and the front and rear ends 3a and 3b of the outer blade 3 are bent to the front and rear frame portions 20c and 20 of the outer blade frame 20.
and the front and rear frame portions 20c and 20d are overlapped on each outer surface of d.
Of the outer blade receiving step portion 22 having an arcuate shape in which the left and right ends 3c and 3d having an arcuate shape are protruded from the inner surfaces of the left and right frame portions 20a and 20b. Receiving and supporting each on the arc edge (see FIG. 6). In this way, the outer blade 3 has four ends 3a
3b, 3c and 3d are four-sided frame portions 20c and 20 of the outer blade frame 20.
By tightly integrally fixing to d. 20a and 20b, respectively, a strong sticking state in which the skin pressing force is less likely to locally deform is obtained.

The outer blade frame 20 having the outer blade 3 stretched is
Front, rear, left and right walls 19a, 19b, 19c, 19 shown in FIG.
It is vertically movably fitted into the outer cutter holder 19 having a rectangular cylindrical shape having d from below by a predetermined stroke, and after this fitting, the disk-shaped piece 23 is attached to the left and right walls 19c and 19d of the outer cutter holder 19. The notches 24 at the respective upper ends are fitted into the square holes 25 provided at the upper ends of the left and right frame portions 20a and 20b of the outer cutter frame 20 to integrally connect the two (see FIG. 6). As shown in FIG. 14, the outer blade holder 19 is provided with a backing plate 30 on the outer surface of the front wall 19a thereof and a comb 31 for guiding the long hair or curly hair to the outer blade 3 on the outer surface of the rear wall 19b thereof. There is.

12 to 14, the upper limit of movement of the outer cutter 3 in the outer cutter holder 19 is restricted by the outer cutter holder 1.
9 and the outer blade frame 2
It is carried out by engagement with the protrusion 27 provided on the 0. The lower limit movement regulation is that the pins 28 protruding from the inner surfaces of the attachment plate 30 and the comb 31 are passed through the front wall 19a and the rear wall 19b and then protruded toward the inner surface of the outer blade holder 19, and the pins 28 are This is performed by engaging with a notch 29 provided at the lower end of the outer blade frame 20.

The piece 23 is a left and right frame portion 2 of the outer blade frame 20.
It is attached to the outer blade holders 0a and 20b and is attached to the outer blade holder 19 so as to follow the vertical movement of the outer blade frame 20. As a result, for example, if the piece 23 is formed in a circular shape similar to the end face shape of the inner blade 2, as the outer blade frame 20 moves up and down with respect to the outer blade holder 19 by the pressing of the outer blade 3, The piece 23 moves up and down in the notch 24 in a side view, and this movement gives an impression to the user as if the inner blade 2 itself exhibited such a vertical floating on the inner surface of the outer blade 3. Furthermore, if the piece 23 is formed in a circular shape similar to the end surface shape of the inner blade 2 and is made of a transparent body, and the outer blade frame 20 is made transparent, the rotation state of the end surface of the inner blade 2,
The rotation status of the gear 65, which will be described later, or the rotation status of the disks when the disks are arranged separately from the gear 65 can be seen from the outside and the feeling of a rotary electric shaver can be presented to the outside.

The outer blade holder 19 is detachably attached to the upper portion of the main body case 1 as described above. Therefore, as shown in FIG. 6, the outer blade holder 19 is provided with recesses 34 on the inner surfaces of the left and right walls 19c and 19d of the outer blade holder 19, and is attached to the upper and left sides of the main body case 1 via springs 35 so as to be retractable. By engaging the concave portion 34 with the engaging element 36, the mounted state of the outer blade holder 19 is maintained. In addition, slits 33 are formed on the left and right walls 19c and 19d of the outer blade holder 19.
And a detaching button 37 is attached to the slit 33 so as to be elastically displaceable inward and outward with the upper end portion 37a of the detaching button 37 as a fulcrum. The button 37 when the outer blade holder 19 is attached
The outer blade holder 19 can be pulled out upward from the upper portion of the main body case 1 by pushing the lower end portion 37b of the blade inward with the finger to retract the engaging member 36 against the spring 35.

As shown in FIG. 15, the inner blade 2 is a cylinder type and has a plurality of spiral cutting blades 38 on its peripheral surface, and a shaft 39 is integrally projected from the center of each of the left and right end surfaces. is doing. As shown in FIG. 6, the inner blade 2 has a bearing 42, between the upper end portions of the left and right support frames 40, 41 facing each other.
It is rotatably supported via 43. A drive motor 44 and a drive transmission means 45 for reducing the rotation of the drive motor 44 and transmitting the rotation to the inner blade 2 are mounted on the left and right support frames 40 and 41. These inner blades 2, left and right support frames 40.4
The drive unit 47 is configured by integrally combining the drive motor 44, the drive motor 44, and the drive transmission means 45. The drive unit 47 is supported by the main body case 1 by an elastic support member 46 so as to be vertically floatable.

The left and right support frames 40 and 41 are each formed in a vertically long plate shape such as polyacetal or composite plastic filled with a reinforcing material, and as shown in FIG. Motor holding cylinders 49 and 50, which respectively hold the left and right halves of the outer surface of 44, are integrally formed to project. A pair of front and rear coupling bosses 51 are integrally formed on the lower side of each motor holding cylinder 49, 50.

As shown in FIG. 15, the elastic support member 46 is formed of a hard plastic such as polyacetal in a U shape and has a motor support wall 52 which supports the lower left and right peripheral surfaces of the drive motor 44. From the bottom side of the support wall 52, two thin elastic arms 53 and 54 are respectively horizontally and outwardly projecting outwardly in a cantilever manner integrally in a cantilever manner. The elastic arms 53 and 54 are configured to be elastically swingable only in the vertical direction by forming the plate thickness in the vertical direction thin and forming the plate width in the front-back direction wide. Further, the elastic arms 53 and 54 have the bent portion 53 in the middle thereof.
By forming a. 54a, the elastic swing radius can be independently changed to some extent. The front ends of the front and rear elastic arms 53, 53 and 54, 54 are integrally connected by front and rear connecting pins 55 for engaging and fixing to the inner wall of the main body case 1. A coupling boss 56 is integrally formed on the lower side of the motor support wall 52 in the front-rear direction. A cutout portion 57 having a shape corresponding to the motor support wall 52 of the elastic support member 46 is formed in the lower half portions of the protruding ends of the left and right motor holding cylinders 49 and 50.

In FIG. 6, the left and right support frames 40.
Reference numeral 41 indicates that the left and right sides of the drive motor 44 in a horizontal position are fitted in the left and right motor holding cylinders 49 and 50 so as to embrace them integrally, and the protruding ends of the two motor holding cylinders 49 and 50 are butted. By connecting the motor support wall 52 of the elastic support member 46 between the cutout portions 57, 57 of the protruding ends of the motor holding cylinders 49, 50, the coupling bosses 51, 56 are formed.
Are aligned in a straight line. Thus, as shown in FIG. 8, the left and right support frames 40 and 41 are integrated with each other via the drive motor 44 by inserting and fastening the fastening members 58 such as tapping screws and rivets into the coupling bosses 51 and 56. Be combined. As shown in FIG. 7, the end surface of the drive motor 44 on the side where the shaft 59 protrudes is fastened to the left-side support frame 40 with a screw 60 so as to be more firmly connected.

In FIG. 6, an accommodating portion 61 in which the drive transmission means 45 is disposed is provided on the outer wall surface side of one of the supporting frames 40, and the shaft 5 of the drive motor 44 is provided below the accommodating portion 61.
9 is projected. The drive transmission means 45 is a drive motor 44.
The output gear 62 is fixed to the end of the shaft 59, and the gear 62 is meshed with the lowermost gear of the multi-stage gear 63 that is axially supported by the accommodating portion 61. The housing 61 is closed by a cover 61a.

The upper ends of the left and right support frames 40 and 41 are integrally connected by a beam member 64 having a bearing 43 at one end as shown in FIG. As shown in FIG. 15, the beam member 64 is made of a material having high rigidity such as a die cast product or brass, and holes 64a are provided at both ends of the beam member 64, and the holes 64a are formed in each of the left and right support frames 40 and 41. The caulking pins 40a and 41a protruding from the upper end are inserted and caulked integrally. As a result, it is possible to further strengthen the prevention of deformation such as bending and twisting of the support frames 40 and 41, and it is possible to more reliably maintain the parallelism between the support frames 40 and 41. The inner blade 2 is detachably attached to the upper ends of the support frames 40 and 41 so that the inner blade 2 can be cleaned and replaced. Therefore, as shown in FIGS. 6 and 15, the left side bearing 42 and the gears 65 and 66 are provided at the end of the left side shaft 39 of the inner blade 2, and the coupling frame 67 is formed from the lower side of the bearing 42. It is integrally projecting rightward so as to be located on the lower side of 2.

To mount the inner blade 2 on the support frames 40 and 41, the right shaft 39 of the inner blade 2 is inserted into and removed from the right bearing 43, and the left bearing 42 is attached to the left support frame 40. Removably coupled to the top. When mounting the inner blade 2, the tip of the coupling frame 67 of the inner blade 2 is slid along the groove 64b provided in front and rear of the inner surface of the beam member 64, and the right shaft 39 is attached to the same side as shown in FIG. Bearing 43
It is inserted in the coupling hole 68 provided on the lower side. When the tip of the coupling frame 67 is inserted into the coupling hole 68, the tip abuts against the taper of the locking claw 70 provided on the inner blade removing plate 69, and the releasing plate 69 is automatically resisted against the spring 71 once. Push down. When the tip of the coupling frame 67 passes over the lock claw 70, the inner blade removing plate 69 automatically moves upward by the spring 71, and the lock claw 7
0 plunges into the inside of the tip of the coupling frame 67 and locks.

By mounting the inner blade 2, the left bearing 42 is fixedly fixed to the upper end of the left supporting frame 40 as shown in FIG. 6, and the gear 66 is the multistage gear 63 of the drive transmission means 45.
It is possible to obtain a state of meshing with the uppermost gear of. Therefore,
The rotation of the drive motor 44 is performed by the multistage gear 63 and the gear 66.
-Transmitted to the inner blade 2 via 65.

The drive unit 47 constructed as described above
Is assembled between the front and rear cases 1a and 1b of the main body case 1. At this time, as shown in FIGS. 3 and 6, the upper ends of the left and right support frames 40, 41 supporting the inner blade 2 project upward from the left and right slits 72 provided in the upper walls of the front and rear cases 1a, 1b, The drive motor 44 is incorporated so as to be housed in the main body case 1. Left and right support frames 40.4
The gap between 1 and each slit 72 is closed in advance by a flexible rubber hair intrusion prevention plate 73 provided in the intermediate portion of each support frame 40, 41. As shown in FIGS. 6 and 7, the front and rear ends of the connecting pins 55 of the left and right elastic arms 53 and 54 are bosses 74 provided on the inner walls of the front and rear cases 1a and 1b.
It is engaged and fixed in the hole 74a.

By incorporating the drive unit 47 in this manner, the entire drive unit 47 is supported so as to be able to float in the vertical direction through elastic deformation of the left and right elastic arms 53 and 54. Further, as shown in FIG. 6, a push-up spring 76 is interposed between each bottom side of the left and right motor holding cylinders 49 and 50 and a spring receiver 75 provided on the main body case 1 side, and the push-up spring 76 drives the push-up spring 76. The inner blade 2 is brought into close contact with the inner surface of the outer blade 3 by always pushing the entire unit 47 upward and urging it.

5 and 7, the shaving unit 14 mounted on the rear surface side of the main body case 1 has a fixed comb blade 78 fixed to the shaving holder 77 and a movable comb blade 7.
Movable comb blade 7 consisting of 9 and inheriting motor output
A movable comb blade 79 is provided with an engaging element 80 which is transmitted to the movable comb 9. The shaving unit 14 is stored in a storage position along the outer surface of the rear case 1b with the cutting edge facing downward (solid line in FIG. 5).
And a use posture in which the blade edge is projected rearward (indicated by a chain double-dashed line in the figure) so as to be rotatable about the support shaft 15. The posture switching operation is performed by the shaving operation button 16 provided on the outer surface of the rear case 1b so as to be vertically slidable.
And a shaving lever 81 for connecting the operation button 16 and the shaving unit 14.

The drive unit 47 includes a drive motor 4
A shaving drive arm 82 (see FIG. 6) for transmitting the rotation of 4 to the movable comb blade 79 is incorporated. The drive arm 82 is formed in an L shape in plan view, and has a forked portion 83 that engages with an engaging element 80 on the side of the movable comb blade 79 at one end and a drive motor at the other end as shown in FIGS. 6 and 7. Bifurcated portions 85, which engage with eccentric pins 84a on a disk 84 integrally formed on the end surface of the output gear 62 of 44, are provided so as to project upward. The drive arm 82 is passed through an opening 86a formed by engaging a groove-shaped piece 86 below the motor holding cylinder 49 of the support frame 40, and a boss 87 provided at an intermediate portion of the drive arm 82 is provided as described above. The motor support wall 52 is rotatably pivotally attached to a support pin 88 provided on the lower surface side of the motor support wall 52. At this time, as shown in FIG. 8, the drive arm 82 receives the rotation of the eccentric pin 84a, and the support pin 8
8, the driving force is transmitted to the movable comb blade 79 by engaging the engaging element 80 with the forked portion 83 in the projecting use posture of the shaving unit 14 shown by the chain double-dashed line in FIG. It

When cleaning dust and replacing the inner blade 2, the outer blade 3
A safety switch mechanism 89 is provided for the safety purpose of not mechanically turning on the power switch button 9 when the outer blade holder 19 is removed. As shown in FIGS. 17 and 18, the safety switch mechanism 89 includes the switch operation plate 10 on the inner surface side of the front case 1a.
An operator 90 is provided at a higher portion so as to be swingable back and forth around a horizontal shaft 91 provided at an upper and lower intermediate portion thereof.
The upper end 90a of the switch is projected from the hole 92 of the front case 1a, and the lower end 90b thereof is exposed to the upper end of the switch operating plate 10. Then, the operator 90 is constantly urged by the spring 93 in a counterclockwise direction so that the upper end 90a is projected outward from the hole 92. As a space required for the swinging stroke of the upper end 90a of the operator 90, a dead space formed between the outer arc portion 44a of the drive motor 44 and the inner surface of the front case 1a is used. Can be compactly housed inside the narrow case of the body case 1.

As shown in FIG. 17A, when the outer blade holder 19 is detached from the main body case 1 and the upper end 90a of the operator 90 is projected by the force of the spring 93, the lower end 90b thereof is the switch operation plate 10. Since it is positioned so as to engage with the upper side of the switch operating plate 1 by the power switch button 9 at this time.
Disables the upward movement operation (switch on) of 0. When the outer blade holder 19 is attached to the main body case 1 as shown in FIG. 6B, the upper end 90a of the operator 90 is pushed down by the lower end of the outer cutter holder 19 and the lower end 90b is disengaged from the upper end of the switch operation plate 10. The power switch button 9 can be used to move the switch operation plate 10 upward. Therefore, when the outer blade holder 19 is removed for cleaning or the like, the inner blade 2 does not rotate carelessly, which is extremely safe.

Instead of mounting the charging plug 6 on the bottom of the main body case 1, the plug 6 is rotated around a shaft 95 in a recess 94 provided in the lower rear surface of the main body case 1 as shown in FIGS. It may be movably supported, and may be attached so as to be switchable between a projecting posture (B in FIG. 20) and a retracted posture (A in FIG. 20) with a knob 96 attached thereto. The projecting posture is maintained by engaging the engaging members 98 provided at both ends of the shaft 95 with the recesses 97a of the first moderation plate 97 provided inside the main body case 1, and the retracted posture is inside the main body case 1. To another second moderation plate 99 provided on the
It can be held by engaging with 8.

In the above embodiment, the left and right motor holding cylinders 49,
When the drive motor 44 is integrally hugged by 50, a motor support wall 52 which is a separate body from the motor holding cylinders 49 and 50.
Although the motor support wall 52 is omitted, the drive motor 44 may be integrally held only by the left and right motor holding cylinders 49 and 50. In addition, the elastic support member 46
Is the left and right support frames 40, 41 or the motor holding tube 4
It can also be formed so as to integrally project from 9.50. As the drive transmission means 45 between the shaft 59 of the drive motor 44 and the shaft 39 of the inner blade 2, belt transmission may be adopted instead of gear transmission.

[0034]

As described above, according to the present invention, the left and right support frames 40, 41 are drive motors 4 which are rigid bodies.
4 is held by the motor holding cylinders 49 and 50 and integrally connected. Therefore, the support frames 40 and 41 are made of plastic for weight reduction and cost reduction, and are easily inferior in bending rigidity and torsional rigidity, but this rigidity is increased by the rigidity of the existing drive motor 44 to increase special parts. Can be fully supplemented without. Therefore, the dimensional stability between the shaft 59 of the drive motor 44 and the drive transmission means 45 is excellent,
The drive transmission to the inner blade 2 can always be stably and reliably performed. In addition, the rigidity of the drive motor 44 can be used to stabilize the dimension between the bearings 42 and 43 at the upper ends of the support frames 40 and 41, so that stable rotation of the inner blade 2 can be guaranteed at all times and good sharpness is exhibited. can do. Further, since the motor holding cylinders 49, 50 are formed integrally with the support frames 40, 41, the assembly work for integrally connecting the left and right support frames 40, 41 via the drive motor 44 can be easily performed. The present invention also includes the left and right support frames 40 and 41.
Since the portions directly below the inner blade 2 are integrally connected by the beam member 64 made of a rigid material, there is no bending or twisting of the upper ends of the support frames 40, 41 when the inner blade 2 is attached or detached, and the support frames 40, 41 The dimensional stabilization between the bearings 42 and 43 at the upper end of the can be further enhanced.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view schematically showing a main part.

FIG. 2 is a perspective view of the entire appearance as seen from the rear side.

FIG. 3 is a perspective view of the entire external communication seen from the front side with the outer blade removed.

FIG. 4 is an overall vertical sectional front view.

FIG. 5 is a vertical sectional side view of the whole.

FIG. 6 is a vertical sectional front view of a head portion.

FIG. 7 is a vertical sectional side view of a head portion.

8 is a cross-sectional view taken along the line AA in FIG.

FIG. 9 is an exploded perspective view of the whole.

FIG. 10 is an exploded perspective view of a front case.

FIG. 11 is an exploded perspective view of a rear case.

FIG. 12 is an exploded perspective view of an outer blade holder.

FIG. 13 is a vertical sectional front view of the outer blade holder, in which (A) shows a state where the outer blade is pushed up by the inner blade, and (B) shows a state where the outer blade is pushed down by the skin. There is.

FIG. 14 is a vertical cross-sectional side view of the outer blade holder, (A) shows a state where the outer blade is pushed up by the inner blade, and (B) shows a state where the outer blade is pushed down by the skin. There is.

FIG. 15 is an exploded perspective view of a drive unit.

FIG. 16 is a vertical sectional front view showing a state where the inner blade is being mounted.

FIG. 17 is a front view showing the safety switch mechanism, (A) showing a state where the outer blade is removed, and (B) showing a mounting state of the outer blade.

FIG. 18 is a rear view of the safety switch mechanism.

FIG. 19 is a vertical sectional front view of a charging plug portion showing another embodiment.

20 is a cross-sectional view taken along the line BB in FIG. 19, (A) shows a housed state of the charging plug, and (B) shows a protruding state of the charging plug.

21 is a cross-sectional view taken along the line CC of FIG.

[Explanation of symbols]

 1 Main Body Case 2 Inner Blade 3 Outer Blade 40/41 Support Frame 42/43 Bearing 44 Drive Motor 45 Drive Transmission Means 47 Drive Unit 49/50 Motor Holding Tube 61 Housing Section 64 Beam Member

Claims (2)

[Claims] 1. A main body case (1) is provided with an arch-shaped outer blade (3), a cylinder-shaped inner blade (2) which is slidably rotated around a horizontal axis with respect to an inner surface of the outer blade (3), and a drive unit (47) for the inner blade (2). The drive unit 47 includes a pair of left and right support frames 40 and 41 facing each other, the drive motor 44, and the drive motor 44.
In a rotary electric shaver that is integrally combined with a drive transmission means 45 that transmits the rotational force of the inner blade 2 to the inner blade 2, the left and right support frames 40 and 41 are molded of a plastic material, and the motor support is attached to the inner wall surface side of each of them. The holding cylinders 49 and 50 are integrally formed so as to be opposed to each other, and an accommodating portion 61 in which the drive transmission means 45 is disposed is formed on the outer wall surface side of one of the support frames 40. Support frames 40 and 41 are integrally coupled to each other in a state in which the drive motor 44 is held in the motor holding cylinders 49 and 50 in a horizontal posture, and the support frames 40 and 41 are provided between the upper ends of the left and right support frames 40 and 41. The inner blade 2 is configured to be supported via bearings 42 and 43. The drive unit 47 has a structure in which the inner blade 2 protrudes outside the main body case 1 and a drive motor. Rotary electric shaver 4 is characterized in that it is floating freely supported vertically relative to the body case 1 to fit inside the main body case 1. 2. A beam member 64 made of a rigid material integrally connects portions of the left and right support frames 40, 41 projecting upward and outwardly of the main body case 1 directly below the inner blade 2. Rotary electric razor as described.