JPH03224588A - Rotary type electric razor - Google Patents

Abstract

PURPOSE:To enhance the adhesion of a rotary inner blade against an outer blade and to improve the sharpness and to prevent the outer blade from being damaged by moving straightly an inner blade driving unit only in the vertical direction by a vertical motion guide means, and regulating its movement in the forward and backward and the left and right directions. CONSTITUTION:Between a motor 21 and the inside surface of a main body case 1, a vertical motion guide means 33 for regulating the movement in the forward and backward and the left and right directions of an inner blade driving unit 15 is provided. As for the vertical motion guide means 33, a forward/backward position control rib 58 is protruded and provided integrally from each inside surface of front and rear cases 1, and by guiding the motor 21 between these front and rear forward/backward position control ribs 58, 58, it is regulated that the whole unit 15 moves in the ward and the backward directions. Also, on the inside surface of the rear case 1b, a vertical circular recessed part 60 is formed, a pin 61 is protruded and provided from a motor holder, the pin 61 is fitted to the recessed part 60 so as to be freely slidable in only the vertical direction, and the moving regulation in the left and right directions of the unit 15 is also executed surely. In such a way, a stable adherence state of a rotary inner blade 19 against an outer blade 7 is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a rotary electric shaver, and more specifically to an improved guide structure of an inner blade drive unit thereof.

[Conventional technology]

As a rotary electric shaver, for example, a rotary inner cutter, a motor, and a drive transmission means for transmitting the motor output to the rotary inner cutter are integrally assembled into an inner cutter drive chassis to constitute an inner cutter drive unit, and the inner cutter is There is one in which the drive unit is always pushed up by a leaf spring inside the main body case to bring the inner cutter into close contact with the inner surface of the outer cutter.

[Problem to be solved by the invention]

However, when the inner cutter drive unit is always installed in the main body case in a push-up state, the inner cutter drive unit must be able to stably maintain a posture in which the inner cutter is always in close contact with the inner surface of the outer cutter, and also be able to release pressure. It is desired that the inner cutter drive unit be able to move up and down smoothly following the outer cutter being pushed, but if the inner cutter drive unit is simply supported by a leaf spring within the main body case as in the conventional example mentioned above, There is a lack of stability in regulating the position in the left and right direction, and it is difficult to obtain stable contact with the outer cutter. For example, when the outer blade is locally pushed due to pressure relief,
Localized gaps tend to form between the outer and inner blades, reducing the cutting quality, and may also pull hair in, causing unpleasant damage. Furthermore, if the inner cutter moves up and down in an inclined position relative to the outer cutter, there is a problem in that the sharpness of the inner cutter also decreases and the outer cutter may be damaged.

The present invention has been made to solve these problems, and it improves the guide structure of the inner blade drive unit in the above-mentioned rotary electric razor in which the inner blade drive unit is movable up and down. The purpose of this addition is to improve the adhesion of the rotary inner cutter to the outer cutter, improve sharpness, and prevent damage to the outer cutter.

[Means for Solving the Problem] As shown in FIGS. 1(a) and 1(b), the present invention has an arch-shaped outer blade 7 detachably attached to the upper side of the main body case 1.
The present invention is based on a rotary electric shaver having an inner cutter drive unit 15 supported vertically movably with respect to the main body case 1.

In addition, the inner cutter drive unit 15 includes a rotary inner cutter 19 that rotates in sliding contact with the inner surface of the outer cutter 7, and an inner cutter drive chassis 16 that rotatably supports the rotary inner cutter 19.
A motor 21 mounted on the inner blade drive chassis 16 and a drive transmission means 2 for transmitting the motor output to the rotary inner blade 19
2 are integrally combined.

Between the circumferential surface of the motor 21 and the inner surface of the main body case 1,
This is a problem in that the inner blade drive unit 15 is provided with a vertical movement guide means 33 that restricts movement of the inner blade drive unit 15 in a direction other than the vertical direction, that is, movement in the front-back and left-right directions.

[Effect]

In such a case, even if depressurization is applied to the outer cutter 7 entirely or locally, the inner cutter drive unit 15 will not tilt forward or backward or left or right due to the position regulation by the vertical movement guide means 33. , move straight up and down only. Therefore, even though the inner cutter drive unit 15 moves up and down, the rotary inner cutter 19 can always be in close and stable contact with the outer cutter 7 without any gaps.

〔Effect of the invention〕

According to the rotary electric shaver of the present invention, the vertical movement guide means 33 allows the inner blade drive unit 15 to move straight only in the vertical direction, and its movement in the front and rear and left and right directions is restricted. On the other hand, rotary inner blade 19
A state in which the blades are always in close contact with each other in a stable manner can be obtained, which improves sharpness and also prevents damage to the outer blade 7. Furthermore, the vertical movement guide means 33 uses the motor 21, which is one of the constituent members of the inner cutter drive unit 15, and guides the flat, smooth motor 21 without any unevenness. Since the motor 21 and the inner cutter drive chassis 16 are integrated, the vertical movement of the rotary inner cutter 19 can be guided stably and reliably, which is advantageous.

〔Example〕

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

In Figures 2 to 4, the main body case 1 of this
The front and rear cases 1a and 1b are butted against each other and integrally connected with screws 2 or the like. A pair of front and rear circuit boards 3 and 4 are installed in the lower half of the main body case 1, with two rechargeable batteries 5 such as nickel-cadmium batteries arranged between the side boards 3 and 4. A charging plug unit 6 is attached.

In FIGS. 3, 6, and 8, a mesh-shaped outer cutter 7 is attached to the upper part of the main body case 1 via a holder 8 thereof, which is curved into an arch shape. The outer blade holder 8
As shown in FIG. 6, it consists of an inner holder 8a and an outer holder 8b that is separably stacked on the outside of the inner holder 8a.
is sandwiched between the mating surfaces of the inner and outer holders 8a and 8b.

As shown in FIG. 8, the fixed rear end 7b of the outer cutter 7 is caulked and welded to the rear wall of the inner holder 8a, and the movable front end 7a of the outer cutter 7 is attached to the front wall of the inner holder 8a. The outer cutter 7 is connected to a support plate 9 via a zigzag-shaped spring 10, so that the outer cutter 7 is always pulled toward the movable front end 7a. At this time, in order to suppress the sliding resistance of the outer cutter 7 with the rotary inner cutter 19 as much as possible and to reduce the longitudinal width of the outer cutter holder 8, as shown in FIG. In order to reduce the wrapping angle around the rotary inner cutter 19, the movable front end 7a of the outer cutter 7 is stretched along the downwardly expanding tapered part 13 formed on the front surface of the inner holder 8a, and the support plate 9 is attached to the inner holder 8a. The tapered portion 13 is provided on the front surface of the holder 8a.
It is fixed by caulking and welding to a straight part 14 that is continuously formed vertically below. Further, the upper and lower ends 10a and 10b of the zigzag-shaped spring 10 are rotatably connected to the movable front end 7a of the outer cutter 7 and the support plate 9, respectively.

Therefore, when the outer cutter 7 is pressed against the skin, the outer cutter 7 compresses and deforms the spring 10 and moves downward, and when the outer cutter 7 is removed from the skin, the outer cutter 7 expands and moves upward due to the restoring force of the spring 10. Return. At this time, the outer cutter 7 places the movable piece 34 integrally connected to the front end 7a of the movable side on the front surface of the inner holder 8a in a shape that is slightly sunken below the tapered part 13 and in the shape of the tapered part 13. By sliding the guide groove 13a in the vertical direction along the guide groove 13a formed in parallel with the guide groove 13, the guide groove 13a is guided straightly and smoothly in the vertical direction. Further, when the outer cutter 7 moves up and down, the spring 10 is connected to its upper and lower ends 10a and 10.
b are rotatably connected to the movable front end 7a of the outer cutter 7 and the support plate 9, respectively, so that the difference in angle between the tapered part 13 and the straight part 14 on the front surface of the inner holder 8a is absorbed, and the outer cutter 7 The front end 7a of the movable side appropriately contracts and expands in order to move up and down smoothly on the tapered portion 13.

The left and right wall portions of the inner holder 8a are held by locking pawls 12 with knobs attached to the left and right upper ends of the main body case 1 via springs 11, respectively, so as to be retractable.

Therefore, in FIG. 3, the left and right locking claws with knobs 1
2 against the spring 11, the outer cutter 7 can be removed from the main case 1 together with the holder 8. In addition,
In FIG. 6, reference numeral 116 indicates the outer cutter holder 8 when not in use.
Indicates a protection camp for covering.

An inner blade drive unit 15 is incorporated into the main body case 1. As shown in FIG. 5, the inner blade drive unit 15 includes an inner blade drive chassis 16, an inner blade unit 20, and a motor 2.
1 and a drive transmission means 22 are integrally combined.

As shown in FIGS. 3 and 7, the inner blade drive chassis 1
6 is formed into a U-shape as a whole when viewed from the front, and has left and right chassis 16a, 16b and a bottom chassis 16c, and the upper ends of the left and right chassis 16a, 16b protrude upward from the slit 18 in the upper wall 17 of the main body case 1. So that the main case 1
be incorporated within. The gaps between the left and right chassis 16a, 16b and each slit 18 are closed with hair intrusion prevention rubber 117.

The inner cutter unit 20 has a rotary inner cutter 19 with a spiral cutting edge, and the upper wall 17 of the main body case l is arranged such that the rotary inner cutter 19 rotates in sliding contact with the inner surface of the outer cutter 7.
The upper end portions of left and right chassis 16a and 16b protruding from the chassis are horizontally supported in a removable manner.

The motor 21 and a gear transmission type drive transmission means 22 for transmitting the rotation of the motor 21 to the rotary inner cutter 19 are mounted on the inner cutter drive chassis 16.

A motor holder 23 is superimposed on the bottom chassis 16c of the inner blade drive chassis 16 and integrally connected with screws 24. The motor 21 is held in the motor holder 23 in a vertical position with the screws 24 collinear with each other.

In FIG. 3, the drive transmission means 22 fixes an output gear 27 to an upper output shaft 25 that protrudes from the upper end of the motor 21 upwardly from the motor holder 23 and the bottom chassis 16c, and connects the left and right chassis 16a above the bottom chassis 16c. A driving shaft 28 is rotatably supported between the driving shafts 16b, a gear 29 fixed to the axial center of the driving shaft 28 meshes orthogonally with the output gear 27, and a gear fixed to the right end of the driving shaft 28 3
0 is meshed with a multistage gear 31 housed in the right chassis 16b.

In FIGS. 3 and 7, left and right chassis 16a, 1
Inner cutter unit 2 detachably installed between the upper ends of 6b
0 is a cylinder-shaped rotary inner cutter 19, a shaft 35 protruding from both left and right ends of the rotary inner cutter 19, and a shaft 35 on the right end side.
An inner cutter holder 37 that rotatably supports the
It is made by integrally combining. The inner cutter holder 37 includes a bottom-open housing 38 that accommodates the bearing 36;
It has a connecting frame 39 that projects horizontally from the lower part of the housing 38 to the left side, and inside the housing 38, two upper and lower gears 40a fixed on the shaft 35 and a gear 40b meshing with the gear 40a are assembled. The lower circumferential surface of the lower gear 40b faces the open bottom of the housing 38 so as to be releasably engaged with the uppermost gear of the multi-stage gear 31 of the drive transmission means 22.

7 and 9, regarding the structure for attaching and detaching the inner cutter unit 20 to the upper end of the inner cutter drive chassis 16, the upper end side of the right chassis 16b is provided with a housing holder that receives and supports the housing 38 of the inner cutter unit 20. Part 41
will be established. A bearing 42 that supports the left shaft 35 of the rotary inner cutter 19 in a removable manner is provided on the upper end side of the left chassis 16a.
The housing 43 that accommodates the
1 and is integrally extended and formed to be higher than 1.

Further, as shown in FIG. 9, a connecting hole 44 is formed in the lower part of the housing 43 of the left chassis 16a, into which the tip 39a of the connecting frame 39 of the inner blade holder 37 is inserted and supported in a removable manner. Further, the left chassis 16a is provided with a locking means for locking the leading end 39a of the connecting frame 39 from coming out of the connecting hole 44. The locking means includes an inner blade release button 45 mounted on the outside of the left chassis 16a so as to be slidable up and down. On the inner surface of the inner blade release button 45, a lock pawl 46 that can be freely engaged and disengaged from the inside of the tip 39a of the connecting frame 39 is integrally provided. The inner cutter release button 45 is always urged upward by a spring 47, and maintains a state in which the lock pawl 46 engages with the tip 39a of the connecting frame 39 from below.

As shown in FIG. 7, a guide frame 48 is integrally extended between the upper ends of the left and right chassis 16a and 16b in a horizontal state, and guide grooves 49 are provided at the front and rear of the inner surface of the guide frame 48, respectively. It is provided in accordance with the height position of the hole 44. By inserting the tip 39a of the connecting frame 39 into this guide groove 49 from the right end side and sliding the entire inner cutter unit 20 horizontally to the left, the tip 39a of the connecting frame 39
9a is inserted into the connecting hole 44.

In this way, the inner blade unit 20 is mounted on the left and right chassis 16a.
6b, the inner blade unit 20 is
Slide the connecting frame 39 into the guide groove 49 from the right chassis 16b toward the left chassis 16a, insert the left shaft 35 into the bearing 42 as shown by the two-dot chain line in FIG. The tip end 39a of is inserted into the connecting hole 44. When the tip 39a of the connecting frame 39 is inserted into the connecting hole 44, the tip 39a comes into contact with the taper of the lock claw 46 of the inner blade removal button 45, and the button 45 is once pushed down against the spring 47, and the tip 39a is inserted into the connecting hole 44. When the button 45 passes over the lock claw 46, the button 45 is automatically moved upward by the spring 47, and the button 45 is moved upwardly by the spring 47.
6 is plunged into engagement with the inside of the tip 39a of the connecting frame 39 and locked. In addition, as shown in FIG. 3, the inner cutter unit 20
The housing 38 of the right chassis 16b fits onto the housing receptacle 41, so that the gear 40b in the housing 38 meshes with the gear 31 of the drive transmission means 22. In this installed state of the inner cutter unit 20, the connecting frame 39 is inserted and supported in the connecting hole 44, and the locking claw 46
By locking the extraction in a stopper-like manner, a state is obtained in which vertical, longitudinal, and horizontal movements of the inner cutter unit 20 are regulated.

At this time, since the inner cutter unit 20 is integrally equipped with the inner cutter holder 37, the inner cutter holder 37, especially the housing 38 part, can be held between the fingers and directly attached to the spiral cutting edge of the rotary inner cutter 19. It can be installed safely without touching it. Further, by sliding the connecting frame 39 onto the guide frame 48, it can be easily attached.

Note that the rotary inner cutter 19 may be cleaned even when it is mounted on the inner cutter drive chassis 16. In this case, as shown in FIG. 10 (al), as a cleaning brush 50, a handle 51 is provided with brush bristles 52 of normal hardness and bristles 53 harder than that, and An arcuate recess 53a along the circumference of the rotary inner blade 19 is formed on the tip side of the rotary inner blade 19.As shown in FIG. If the hard brush bristles 53 are applied to a part of the circumference of one axial end of the rotary inner cutter 19 and slid toward the other axial end, the hard brush bristles 53 form a continuous spiral shape from one axial end of the rotary inner cutter 19 to the other end. Since the rotary inner blade I9 slides along the blade groove, hair is scraped off while the rotary inner blade I9 is forcibly rotated.

When removing the rotary inner blade 19 for cleaning or replacing it with a new one, place the outer blade 7 in the holder 8.
When the inner cutter release button 45 is pulled down against the spring 47 after removing it from the upper part of the main body case 1, the lock claw 46 is pulled out downward from inside the tip 39a of the connecting frame 39, and the entire inner cutter unit 20 is removed. By sliding the inner cutter unit 20 to the right, the inner cutter unit 20 can be removed from the inner cutter drive chassis 16.

3 and 7, the inner blade drive chassis 16 has front and rear support arms 54, 54 which are elastically deformable only in the vertical direction from the left and right ends of the plastic motor holder 23.
are integrally protruded horizontally in the left-right direction, and the tips 54a of each support arm 54 are engaged and fixed in a recess 55 provided on the inner wall of the main body case l, so that the entire inner blade drive unit 15 is attached to the left and right support arms 54. It is supported so that it can move up and down through elastic deformation. The stroke of the vertical movement is about 2 mm. A compression spring 57 is interposed between the bottom side of the inner blade drive chassis 16 and a spring receiver 56 fixed to the main body case 1 side so as to correspond to the bottom side of the inner blade drive chassis 16, and the entire inner blade drive unit 15 is moved by the spring 57. By always pressing upward on the outer cutter side, the upper circumference of the rotary inner cutter 19 is always kept in close contact with the inner surface of the outer cutter 7.

In FIGS. 3 and 4, a vertical movement guide means 33 is provided between the motor 21 and the inner surface of the main body case 1 to restrict movement of the inner blade drive unit 15 in the front-back and left-right directions. As the vertical movement guide means 33, longitudinal position regulating ribs 58 are integrally provided to project from the inner surfaces of the front and rear cases 1a and 1b, and the motor 21 is guided between the front and rear longitudinal position regulating ribs 58, 58 to guide the inner blade. The movement of the entire drive unit 15 in the front-back direction is restricted. Further, by forming a vertically long circular recess 60 on the inner surface of the rear case 1b, and protruding a pin 61 from the motor holder 23, the pin 61 is fitted into the recess 60 so as to be slidable only in the vertical direction. , it also ensures that the movement of the inner blade drive unit 15 in the left and right direction is restricted. Therefore, these longitudinal position regulating ribs 58
, and the longitudinally elongated circular recess 60 and pin 61, the position of the inner cutter drive unit 1-15 in the longitudinal and lateral directions is stably regulated, and the rotary inner cutter 19 is in stable contact with the outer cutter 7. .

In FIG. 4, a switch case 69 is mounted on the outer surface of the front case la so as to be slidable in the vertical direction. A fixed comb blade 70 and a movable comb blade 7I for edge shaving are provided at the upper part of the inner surface of the switch case 69 so that each blade edge protrudes upward, and the motor output is transferred to the movable comb blade 71. It includes a driving piece 72 that transmits power. Further, the switch case 69 is integrally connected to a moderation plate 73 (see FIG. 5) arranged on the inner surface of the front case 1a.

The moderation plate 73 includes a switch plate spring 74 that comes into contact with and separates from the switch terminal on the circuit board 3 as the switch case 69 slides up and down, and a moderation protrusion 5 that protrudes from the inner surface of the front case 1a.
It has a moderation arm 75 that can be freely engaged with and detached from 9. As shown in FIG. 1(b), the moderating projections 59 are formed by forming the longitudinal movement regulating ribs 58 protruding from the inner surface of the front case 1a into an arc shape when viewed from the front, and three of these are arranged in the vertical direction. The longitudinal movement regulating rib 58 and the moderating protrusion 5
It has a structure that also serves as 9. However, the moderating projection 59 may be provided separately from the longitudinal movement regulating rib 58.

In this way, the switch case 69 moves the moderation arm 75 into engagement with the moderation protrusion 59 in a step-by-step manner, thereby moving the switch case 69 to the lower standby position (switch off position) shown in solid line in FIG. position (switch-off position) and one step higher, the crease shaving drive piece 72 engages with the crease shaving drive arm 76 on the upper output shaft 25 of the motor 21, and the driving force is transmitted to the movable comb blade 71. , a first upwardly projecting use position where the movable comb blades 71 and the fixed comb blades 70 are used together with the rotary inner blade 19 and outer blade 7 for shaving; (
The comb blades 71 and the fixed comb blades 70) are positioned and held at the second upwardly projecting use position, respectively. In FIG. 4, the movement stroke of the switch case 69 from the lower standby position to the motor starting position is indicated by the symbol SL, and the movement stroke from the motor starting position to the first upward protruding use position is indicated by the symbol S2, 2nd from the protruding use position
The movement stroke to the upwardly protruding use position is indicated by the symbol S, respectively.

4 and 5, the switch case 69 has a lock button 77 protruding from a hole 78 in the switch case 69 for holding the switch case 69 in a lower standby position and preventing accidental upward movement. The lower standby position of the switch case 69 is held by a lock claw 79 protruding from a moderation plate 73 as shown in FIG. When the button 77 is pressed, the lock claw 79 is disengaged from the engagement portion on the inner surface of the front case 1a, allowing the switch case 69 to slide upward.

In FIGS. 4, 11 to 14, below the rotary inner cutter 19 of the main body case 1, a hair waste storage chamber 80 is formed to collect the hair falling from the inner cutter 19. 12th
As shown in the figure, the lint storage chamber 80 is formed in the shape of a slide consisting of a straight line part 80b that slopes downward from the inner bottom surface 80a and a circular arc part 80c that is continuously formed below the straight part 80b. A discharge port 81 is formed at the lower end side of the rear case 1b so as to face the upper outer side of the rear case 1b. A shutter 82 is attached to the discharge port 81 of the hair collection chamber 80 around a shaft 83 between the closed position of the discharge port 81 (see FIG. 12) and the open position of the discharge port 81 protruding outward (see FIG. 13). Approximately 90
Pivotally mounted for free rotation. The shutter 82 is interlocked and connected to an opening/closing lever 84 provided on one side of the main body case 1 so as to be slidable up and down by a predetermined stroke, and when the lever 84 is slid, the shutter 82 is rotated to open and close around a shaft 83 . In addition, a scraping blade 85 is pivoted in the interior of the hair collection chamber 80 so as to be rotatable approximately 124 degrees around a shaft 86 between a standby position (see Fig. 12) and a scraping end position (see Fig. 13). be done. Note that the shaft 83 and the shaft 86 are on the same axis. As shown in FIG. 12, in the standby position of the raking blade 85, the tip 85a of the blade 85 is connected to the lint trap so that the hair that will fall from the rotary inner cutter 19 will smoothly and reliably flow into the trap 80 while the rotary inner cutter 19 continues to rotate. A hair waste inflow opening 87 is formed between the inner bottom surface 80a of the chamber 80 and the linear portion 80b so as to substantially coincide with the downward tangential direction of the inner cutter circumference.

When the scraping blade 85 rotates from the standby position toward the discharge port, its tip 85a forms the arcuate portion 80 of the inner bottom surface 8'Oa.
The tip 8 gradually approaches b, and continues in this close state.
When 5a rotates along the arc portion 80b to the end position of scraping, the hair on the inner bottom surface 80a is scraped out from the discharge port 81. The scraping blade 85 rotates in conjunction with the opening operation of the shutter 82 in the rotation range from the standby position until the tip 85a approaches the inner bottom surface 80a, and thereafter rotates in the direction of the discharge port. This is done automatically using the restoring force of the spring 88. For that purpose, the first
As shown in FIGS. 1 and 14, a torsion coil spring 88 is hung between the scraping blade 85 and the main body case 1.

When the spring 88 is in the initial wound state, one end 88a of the spring 88 is inserted into a hole 90 provided in the side wall 89 of the lint storage chamber 80, and the other end 88
b passes through a groove 91 formed in the side wall 89 in an arc shape centered on the shaft 83, and then passes through the side wall 9 of the scraping blade 85.
They are respectively locked in holes 93 provided at intermediate positions between the shaft 86 and the tip 85a in No. 2.

In such a case, as shown in Fig. 12,
When the discharge port 81 is closed and the scraping blade 85 is in the standby position, the spring 88 expands and the scraping blade 85 is expanded by the restoring force.
is rotated upward, and the base end 85b of the scraping blade 85 presses against the upper end 82a of the shutter 82 to hold the shutter 82 in a closed state. In this way, the shutter 82 closes,
While the scraping blade 85 is on standby, the rotary inner blade 19
The hair that falls from the hair flows into the hair collection chamber 80 through the opening 87 and is collected therein. At this time, in the gap between the circumference of the rotary inner cutter 19 rotating in the direction of arrow P and the front guide frame 48, as shown in FIG. By forming the gap narrowly, it is possible to increase the flow velocity of the hair within the gap, and the hair can smoothly flow into the opening 87. Also,
The scraping blade 85 is in a standby state and prevents hair from scattering outside from the frontage 87 due to the winding up of the air flow shown by the arrow M generated within the hair waste storage chamber 80 as the rotary inner blade 19 rotates. do the work.

To discharge the hair from the hair collection chamber 80, the opening/closing lever 84 is slid upward to rotate the shutter 82 around the shaft 83 to open upward. Then, the scraping blade 85 is initially pushed by the upper end 82a of its shank 82 and rotates toward the scraping end position, but at this time, as shown in FIG. When the movable point A, which is the joint part with the spring 85, reaches the dead center on the line segment β connecting the fixed point B, which is the joint part with the side wall 92 of the other end 88a of the spring 88, and the center of the shaft 86 ( At the position where the distance between the movable point A and the fixed point B is the shortest), the spring 88 is most strongly coiled and deformed, and when it passes its dead center, the spring 88 changes its posture,
Due to its spreading restoring force, the scraping blade 85 suddenly moves to its base end 8.
5b is separated from the upper end 82a of the shutter 82 and rapidly rotated to the scraping end position. Therefore, the hair waste storage chamber 80
The rapid rotation of the scraping blade 85 causes the tip 85a to forcefully scrape out the hair from the outlet 81 and prevent it from adhering to the area around the outlet 81 or the hand holding the main body case 1. It is properly discharged without any problems. Since this scraping of hair is performed by directing the discharge port 81 toward a predetermined disposal location such as a waste container, the hair does not scatter around and contaminate the surrounding area.

As shown in FIG. 13, the scraping blade 85 has an end 92a of its side wall 92 in contact with the inner surface of the shutter 82 at the scraping end position. Therefore, at this time, the shutter 82 is activated by the opening/closing lever 8.
When the scraping blade 85 is rotated closed by the pulling down operation of step 4, the scraping blade 85
is pushed and moved by the inner surface of the shutter 82 and rotates back toward the standby position, and when the spring 88 crosses the dead center at the line segment β, its expanding restoring force automatically returns the raking blade 85 to the standby position. It will be done.

In FIGS. 3, 4, 15, and 16, the charging plug unit 6 built into the bottom side of the main case 1 is sandwiched and fixed between the front and rear cases 1a and 1b as shown in FIG. Plug board 111 and Plug board 111
A fixed socket 94 is fixed to the bottom side of the board 111 so that power can be supplied via a power cord, and a movable socket 94 for charging is attached to the bottom side of the board 111 so that it can be slid left and right and can be plugged into a wall outlet etc. It is integrally combined with the type plug 95. The fixed socket 94 and the movable plug 95 can be used alternatively.

There is a plug outlet 9 on one side of the bottom of the front and rear cases la and 1b.
6, and an operating groove 9'7 is opened in the bottom surface thereof. The plug outlet 96 can be opened and closed by a plug cover 98 mounted above the plug outlet 96 on one side of the front and rear cases 1a and 1b so as to be slidable up and down. The corners of the front and rear cases 1a and 1b on the side where the plug exit/exit port 96 is provided are formed into an oil cross-sectional shape that is rounded in the vertical and longitudinal directions, and the lower end of the plug cover 98 is also formed in the front and rear cases 1a and 1b. It is formed into a rounded shape corresponding to the shape of the corner (see FIGS. 15 and 16).

Therefore, even if the main body case 1 is gripped strongly, the corners will not cause any damage to the palm.

In FIGS. 15 and 16, the plug board 11
A plug blade holder 101, which is U-shaped in plan view, is attached to the lower surface of the plug blade holder 101 so as to be slidable in the left-right direction by a predetermined stroke across both the front and rear sides of the fixed socket throat 94. The plug blade holder 101 has a plug blade insertion hole 102 at its tip 101a, and hook engagement grooves 103 on its front and rear sides.
03 is slidably engaged with the front and rear hooks 104 protruding downward from the front and rear ends of the plug board 111.

The movable plug 95 has a pair of front and rear plug blades 99 and a blade stand 100 integrally connected to the base end thereof.

The movable plug 95 has a plug blade 99 inserted into the plug blade insertion hole 102 of the plug blade holder 101 so as to straddle both the front and rear sides of the fixed socket 94.

Further, an operation knob 105 is attached to the bottom side of the blade base 100, and this operation knob 105 is slidable in the left and right direction in the operation groove 97 together with the movable plug 95. Recesses 106 provided at the left and right end positions
・It is said that each can be freely engaged and detached from 107.

As shown in FIGS. 15 and 16, the operation knob 105
When the movable plug 95 is engaged with the recess 107 at the right end of the operating groove 97, the movable plug 95 is in a state where the plug blade 99 and the plug blade holder 101 are moved in and out of the plug opening 96.

Now, slide the plug cover 98 upward to open the plug exit/exit port 96, and insert the operation knob 105 into the recess 107 at the right end.
When the hook 104 is disengaged and slid to the left along the operating groove 97, the hook 104 first engages with the hook engagement groove 1.
The plug blade 99 protrudes from the plug blade insertion hole 102 and the plug exit/exit opening 96 until it reaches the right end inside the plug blade 99 . When the operating knob 105 is further slid to the left until it engages with the recess 106 at the left end of the operating groove 97, the plug blade holder 101 is engaged with the hook 104 and the right end in the hook engaging groove 103. The plug blade 99 is pushed in that direction together with the plug blade 99, and as shown in FIGS. 17 and 18, the plug blade 99 projects from the plug outlet 96 by a predetermined amount, and the tip 101a of the plug blade holder 101 also It protrudes from the plug exit/exit port 96. The plug blade holder 1
In the protruding state of .degree. 1, the flat tip 101a is set to be in line with the straight portion S continuing upward from the rounded portion R of the convex section corner of the main body case 1. Therefore, even when the plug blade 99 is made to protrude from the plug outlet 96 at the convex cross-section corner during charging, the tip 101a of the plug blade holder 101 is attached to the outlet 1-C (the first
(See the two-dot chain line in Fig. 7) can be brought into surface contact, 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 stand 100. Then, in order to return the movable plug 95 to the plug exit/removal slot 96, the operating knob 105 may be slid within the groove 97 until it engages with the recess 107 at the right end of the operating groove 97. .

[Another example]

In the above embodiment, the rotary inner cutter 19 in the inner cutter drive unit 15 is detachably attached to the inner cutter drive chassis 16, but they may be integrally combined in a non-removable manner. Furthermore, the drive transmission means 22 may be, for example, belt transmission instead of gear transmission.

[Brief explanation of drawings]

FIG. 1 (al is a side view schematically showing the main parts of a rotary electric shaver according to the present invention, FIG. 1 (bl is a front view thereof, and FIGS. 2 to 18 are views showing one embodiment of the present invention. Figure 2 is a perspective view, Figure 3 is a longitudinal front view of the whole, Figure 4 is a longitudinal side view of the whole, Figure 5 is an exploded perspective view of the whole, and Figure 6 is the protection camp and outside. FIG. 7 is an exploded perspective view of the inner cutter drive unit; FIG. 8 is a cross-sectional view of the outer cutter holder; FIG. 9 is a cross-sectional view showing the inner cutter unit being installed; 10
Figure (a) is a front view of the cleaning brush, Figure 10 (b) is a perspective view showing how it is used, Figure 11 is a side view of the lint storage chamber, and Figure 12 is shown with the shutter closed. Figure 13 is a sectional view of the hair collection chamber with the shutter open, Figure 14 is an exploded perspective view of the hair removal mechanism, and Figure 15 is with the movable plug retracted. Fig. 16 is a sectional view taken along line X-X in Fig. 15, Fig. 17 is a longitudinal sectional front view of the bottom of the main case shown with the movable plug protruding, Fig. 18 is a sectional view taken along the line Y-Y in FIG. 17. 1...Body case, 7...Outer blade, 15...Inner blade drive unit, 16...Inner blade drive chassis, 19...Rotary inner blade, 21... ... Motor, 22 ... Drive transmission means, 33 ... Vertical movement guide means. Figure 8 Figure 4/6a 4Φ Figure 0 (a) Ji is Figure 0 Figure (b) Ko Figure 3 Figure 17 Figure 8 Figure 6 Procedure amendment stamp button March 7, 1990

Claims (1)

[Claims] 1. An arch-shaped outer cutter (7) detachably attached to the upper side of the main body case (1), and an inner cutter drive unit supported so as to be vertically movable with respect to the main body case (1). (15), wherein the inner blade drive unit (15) includes a rotary inner cutter (19) that rotates in sliding contact with the inner surface of the outer cutter (7);
Inner blade drive chassis (16) that rotatably supports 19)
and a motor (2) mounted on the inner blade drive chassis (16).
1), and the output of the motor (21) is connected to the rotary inner blade (
19) and a drive transmission means (22) for transmitting power to the inner blade drive unit (15). and a vertical movement guide means (33) for regulating movement in the left and right directions.