JPH0938354A - Swing type electric razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sweep flocks of hair by removing an outer blade holder and replace an inner blade in an extremely safe manner by a method wherein an operation body which moves back and forth following attaching and detaching of the outer blade holder is provided on the side of a swing base and a safety switch which is opened or closed by the operation body is provided on the side of a supporting wall. SOLUTION: In a swing type electric razor in which a swing base 24 between left and right supporting walls 15L is pivoted so as to swing back and forth about an axial center P and an inner blade of the rotary or reciprocating type is supported on the base 24, a safety switch 69 is provided between one of the walls 15L and the base 24 to turn on or turn off electricity to a motor 14. And an operation body 72 which moves back and forth to press or release the switch 69 following attaching and detaching of an outer blade holder 28 is disposed on the base 24. The body 72 has an operation element 72a adapted to contact the holder 28 on its one side and a contact element 72b adapted to push the switch 69 on its other side, both the elements protruding from respective side, and the body can be oscillated together with the base 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing type reciprocating or rotary electric shaver having a razor head which can swing freely.

[0002]

2. Description of the Related Art Generally, in an electric shaver, the outer blade holder is removed to clean the shavings. At this time, if the power switch is turned on carelessly, the inner blade is driven to scatter the shavings or to the user. Give a sense of fear. Therefore, for example, as disclosed in JP-A-5-31264, as a safety switch for a rotary electric shaver, a micro switch for controlling power supply to an inner blade driving motor is provided in a main body case, and an outer blade holder has a main body. In a normal state when mounted on the case, the switch is pressed by a part of the outer blade holder to close the power feeding circuit to the inner blade driving motor, but when the outer blade holder is removed, the pressing action due to this is released, and the power feeding circuit is There is one that I opened. According to this, the inner blade does not accidentally drive when the outer blade holder is removed during cleaning or replacement of the inner blade, which is safe.

[0003]

In recent years, a swinging type electric shaver in which a razor head formed by combining a reciprocating inner blade and an outer blade is supported on an upper portion of a main body case so as to be swingable back and forth (for example, JP Japanese Laid-Open Patent Publication No. 64-56089 and Japanese Laid-Open Patent Publication No. 6-335574) are now on the market, and it is required to take the same safety measures as those described above even in such a type of electric shaver. In this case, for example, the safety switch is provided on the razor head side so as to operate in conjunction with the operation of removing the outer blade, and the power supply circuit to the inner blade drive motor built in the main body case side and the safety switch are lead wires. It is possible to connect. However, such a type has a problem that the lead wire is easily broken as the razor head repeatedly swings.

An object of the present invention has been made in view of the above problems, and an object thereof is to provide a safety switch structure suitable for a swing type electric shaver.

[0005]

According to the present invention, a pair of left and right supporting walls 15L and 15R facing each other are projected upward from an upper surface of a main body case 1 having a built-in motor 14 for driving an inner blade. The rocking base 24 has an axis P between 15L and 15R.
It is swingably pivoted back and forth around and supports a rotary or reciprocating inner blade 25F (25B) on a swing base 24, and an outer blade 27F (2F that covers the inner blade 25F (25B).
7B) is detachably attached by an outer blade holder 28. In such a swing-type electric shaver, a safety switch 69 for interrupting / connecting the power supply to the motor 14 is provided between the opposing surfaces of one of the support walls 15L and 15R and the swing base 24 so that the support wall 15L or On the 15R side, actuating bodies 72 for advancing and retreating according to attachment and detachment of the outer blade holder 28 to push and release the safety switch 69 are arranged on the swing base 24 side, respectively. The actuating body 72 has an operator 72a which comes into contact with the outer blade holder 28 mounted on the swing base 24 side on one side surface thereof, and a safety switch 69 on the supporting wall 15L or 15R side on the other side surface thereof.
It is assumed that the contact portions 72b that press against each other are provided so as to project, and swing forward and backward around the axis P together with the swing base 24. Then, by attaching the outer blade holder 28, the operator 7
2a is pressed to move the operating body 72 backward, and the contact portion 72b presses the safety switch 69 to connect the electric power to the motor 14, and the operating body 72 is removed as the outer blade holder 28 is removed.
Moves forward and releases the pressure on the safety switch 69 to release the motor 1
It is configured to cut off the power supply to No. 4. The operating body 72
At least the contact portion 72b is formed in an arc shape along the swing direction of the swing base 24.

[0006]

In the normal state where the outer blade holder 28 is attached, the actuating body 72 that swings and rotates together with the swing base 24 retracts and presses the safety switch 69 to connect power to the motor 14. In this connection state, the safety switch 69 is at a fixed position on the support wall L or 15R, but the contact portion 72b of the operating body 72 is formed long in the swinging direction, so that the operating body 72 is mounted on the swing base 24. Even if it swings back and forth integrally with, the safety switch 69 is continuously pushed. When the outer blade holder 28 is removed, the actuating body 72 moves forward to release the pressure on the safety switch 69 and cut off the power supply to the motor 14. Therefore, at this time, the inner blade 25F (25B) is not driven.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 2 to 6, this electric shaver is provided with a cutting head 2 on an upper part of a main body case 1, and a shaving blade unit 3 is attached to the cutting head 2. As shown in FIGS. 6, 7 and 29, the main body case 1 includes a front and rear case 1F and 1B having a front and rear half-divided structure that are screwed together, and a cover that is fitted and connected from the left and right to the combined front and rear cases 1F and 1B. It consists of cases 1L and 1R. Inside the main body case 1, a circuit board 4 and a battery 5 are provided.
Electrical components such as the above are incorporated, and a charging plug 6 is provided at the lower end of the main body case 1. On the front surface of the front case 1F, a knob 7 of a start / stop drive switch is provided so as to be slidable up and down, an indicator 8 for displaying a charging state is provided, and a decorative panel 100 exposes the knob 7 and the indicator 8. It is polymerized and fixed as described above. Further, as shown in FIG. 4, a shaving unit 9 and an operation knob 10 for swinging the shaving unit 9 back and forth are mounted on the upper portion of the rear surface of the main body case 1.

As shown in FIGS. 12 and 13, the cutting head 2 has a head case 11.
Reference numeral 1 denotes left and right case portions 11L and 11R and a central case portion 11C which are juxtaposed in the left-right direction and integrally coupled by screws 12.
The motor 14 having the output shafts 13L and 13R at both ends is held and held in a horizontal posture by the case portions 11L, 11C and 11R. From the left and right case portions 11L and 11R of the head case 11, a pair of left and right support walls 15L and 15R are erected so as to face each other, and the support walls 15L and 15R are projected upward and outward from the upper surface of the main body case 1. In addition, the head case 11 is supported by the front and rear cases 1F and 1B from the front and back so that the head case 11 can be vertically retracted within a certain range. Then, the shaving blade unit 3 is assembled between the protruding left and right support walls 15L and 15R.

In FIG. 7, each tip pin 17 of the thin arm 16 extending leftward and rightward from the lower portion of the central case portion 11C of the head case 11 has a boss 9 in the main body case 1.
The compression coil spring 19 is assembled between the left and right lower parts of the head case 11 and the spring receiver 18 of the main body case 1 while being fixed by being inserted into 0. Therefore, the entire cutting head 2 is elastically supported by the thin arm 16 and the compression coil spring 19 so as to be vertically floatable with respect to the main body case 1.
A rubber seal ring 20 is fitted between the bases of the left and right support walls 15L and 15R and the upper opening of the main body case 1 to prevent dust from entering the main body case 1 through the head case withdrawal position. It

In FIGS. 1 and 8 to 10, lid plates 21L and 21R and caps 22L and 22R are fitted and fixed on the outer sides of the respective support walls 15L and 15R, and the right side support wall 15R and its lid plate 21R. A drive transmission means by a gear transmission mechanism 23 for transmitting the motor output to the shaving blade unit 3 is provided in the space between the two. This gear transmission mechanism 23
Is the first fixed to the one output shaft 13R of the motor 14.
Transmission gear G1, second transmission gear G2 meshing with this, second
A third transmission gear G3 integrally connected to the transmission gear G2, a fourth transmission gear G4 meshing with the third transmission gear G3, a fifth transmission gear G5 and a fifth transmission gear integrally connected to the fourth transmission gear G4. It is composed of a sixth transmission gear G6 meshing with G5, a seventh transmission gear G7 meshing with the sixth transmission gear G6, and a final transmission gear G8 integrally connected to the seventh transmission gear G7. The output of the other output shaft 13L of the motor 14 is transmitted to the drive system of the shaving unit 9.

As shown in FIG. 8, the shaving blade unit 3 includes a swing base 24 pivotably supported between the support walls 15L and 15R about a left-right axis P, and a pair of cylinders. Inner blade holder 26 in which parallel rotating inner blades 25F and 25B are axially supported in parallel with the axis P, and mesh-shaped front and rear 2
An outer blade holder 28 in which an outer blade 27F / 27B is stretched in an arch shape is provided. As shown in FIGS. 8 and 20, the swing base 24 is formed in a shallow box shape that is closed by the fitting and mounting of the upper cover plate 29, and the mountain-shaped bracket portions 24L and 24R erected from the left and right sides thereof are supported. Shaft 30L / 3
Support wall 15 in the head case 11 via the 0R
It is pivotally connected to L15R. Inside the swing base 24, an engagement lock mechanism 31 of the inner blade holder 26 (see FIG. 22) and an engagement lock mechanism 32 of the outer blade holder 28 (see FIG. 23) are incorporated, as will be described later.

As shown in FIG. 17, the inner blade holder 26 is
Side walls 26L and 26R are erected from the left and right ends of a bottom wall 26C that forms a flat litter receiving surface S, and the rotary inner blades 25F and 25B are axially supported in parallel between the side walls 26L and 26R. In addition, a space Q (see FIG. 22) is formed between the rotating inner blades 25F and 25B and the debris receiving surface S into which the cleaning brush can be inserted from the front and the rear. Also, each rotating inner blade 25
The input gears GF and GB integrated with the F and 25B are installed outside the right side wall 26R, and the cover bodies 33L and 33R are fitted and connected to the outside of each side wall 26L and 26R. The input gear G is provided on the cover body 33R.
An opening 34 is formed to expose a part of F and GB facing each other. By exposing the facing parts of the input gears GF and GB in this manner, the swing base 24 of the inner blade holder 26 is exposed.
With this, the exposed portions of the input gears GF and GB can be easily meshed with the final transmission gear G8 in the gear transmission mechanism 23, respectively.

In FIG. 17, the left and right side walls 26L and 26R of the inner blade holder 26 are engaged in the shape of a chevron that allows the left and right bracket portions 24L and 24R of the swing base 24 to be engaged as guide portions from above. The parts 35L and 35R are formed. Engagement portion 35L / 3 to bracket portion 24L / 24R
By engaging 5R, the inner blade holder 26 is positioned with respect to the swing base 24, that is, the axis of each rotary inner blade 25F / 25B is the axis of the final transmission gear G8. It is assembled in a state of being located at a constant distance from the heart P. These bracket portions 24L and 24R and the engaging portion 35L
The engagement shape with 35R is configured in a front-rear asymmetric shape having the step portion d only on the front side, and the inner blade holder 26 is left and right by changing the shape of the left and right engagement guide portions in this way. It can be prevented from being assembled in reverse.

As shown in FIG. 18, the outer blade holder 28 is
Left and right side walls 28L and 28R are formed in a hollow shape including front and rear wall portions 28F and 28B and left and right side walls 28L and 28R.
In this case, a pair of front and rear recessed grooves 36 are formed by notches for bypassing the support shafts at the left and right ends of each of the rotating inner blades 25F and 25B when the outer blade holder 28 is assembled to the swing base 24 from above. . Pins 39 for caulking and welding the front and rear end pieces 37, 38 for tensioning the outer blade shown in FIG. 19 are provided inside the front and rear wall portions 28F, 28B. Left and right side walls 28
Longitudinal grooves 41 that engage and support the central end piece 40 for tensioning the outer blade from the left and right are formed in the front and rear intermediate portions of the inner surface of the L / 28R.

Each of the end pieces 37, 38, 40 is formed by plastic molding. As shown in FIGS. 19 and 22, one end of each outer blade 27F, 27B on the upper side of the inner blade rotating direction A is Fixing pins 40a and 38 protruding from the central end piece 40 and the rear end piece 38, respectively.
It is fixed by caulking and welding to a. Also, each outer blade 2
The other end portion of the inner blade rotation direction A of 7F / 27B on the lower side is elastic arms 37b / 40b integrally formed with the front end piece 37 and the central end piece 40 so as to be elastically movable in the vertical direction.
By caulking and welding the movable pins 37c and 40c projecting from it, the movable pins 37c and 40c are attached in a pulled state.

In this way, by fixing one end of each outer blade 27F / 27B on the upper hand side in the inner blade rotation direction and pulling the other end on the lower side of the inner blade rotation direction, each outer blade 27F / 27B rotates. Under the sliding contact resistance with the inner blades 25F and 25B, it is pulled toward the lower side of the inner blade rotation direction A, and the outer blades 27F and 27B tend to loosen on the lower side of the rotation direction A. It can be well suppressed, and the adhesion of the outer blades 27F and 27B to the inner rotating blades 25F and 25B can be constantly improved, and the sharpness can be improved.

As shown in FIG. 19, each outer blade 27F / 27
On the rear end side corresponding to the upper side of the inner blade rotation direction A of B, long holes 42F and 42B for introducing long hair are arranged in a row in the left-right direction along the rotation direction. Then, as shown in FIGS. 18 and 22, a comb-shaped hair straightening member 43 for aligning long hairs in the middle of the front and rear outer blades 27F and 27B to facilitate introduction into the long holes 42F of the front outer blade 27F. Is laterally extended across the left and right side walls, and a comb 44 for facilitating the introduction of long hair into the long hole 42B of the rear outer blade 27B is integrally formed at the upper end of the rear wall portion 28B of the outer blade holder 28. It The hair straightening member 43 is integrally formed of plastic, and both ends thereof have left and right side walls 28L.2 of the outer blade holder 28.
8R is engaged with and supported by a vertically elongated groove 45 formed so as to be vertically movable, and is pushed upward by a leaf spring 46 externally fitted and connected to the central end piece 40 so that the hair straightening member 43 is smooth against the skin. The long hair can be satisfactorily trimmed by following.

Engagement lock mechanism 32 of the outer blade holder 28
The configuration of is shown in FIGS. 20, 21 and 23. A pair of front and rear locking claws 50 are formed on the left and right sides of the swing base 24.
Compressive coil spring 5 that can move forward and backward through 1
2 is assembled so as to be urged to project. The protruding ends of the locking claws 50 are urged to engage with the engaging recesses 53 formed on the inner surface of the lower portion of the outer blade holder 28, whereby the outer blade holder 28
Is fixed to the swing base 24 at a predetermined mounting position.
Further, a pair of swing links 55 are pivotally supported by a support shaft 54 standing upright in the center of the swing base 24 so as to intersect with each other in an X shape, and each is supported by a long hole 55a formed at an end of each swing link 55. The pin 50a provided on the lower surface of the locking claw 50 is engaged. An operating member 56, which is guided so as to be movable only in the left and right direction, is provided on the upper part of the swinging link 55, and each swinging link 55 is provided in laterally triangular cam holes 56a formed at two positions on the left and right sides of the operating member 56. The upright cam follower pin 55b is engaged. When the engagement lock of the outer blade holder 28 is effective, the cam follower pins 55b are located at the left and right ends of the bottom of the triangular cam hole 56a, and the operating member 56 is moved to the right in the figure from this state. Then, each cam follower pin 55b is pulled toward the apex side of the triangular cam hole 56a, and each swing link 5 is pulled.
5 is folded and rocked, each locking claw 50 is displaced backwards against the compression coil spring 52, and the engagement lock is released.

The left end portion 56b of the operating member 56 is shown in FIG.
1 and 7, the inner end of the lock release button 58 provided on the left side surface of the cutting head 2 is inserted into the through hole 57 provided in the swing base 24 as shown in FIGS.
, And the operation member 56 can be pressed and displaced in the unlocking direction as described above by pushing the lock release button 58 against the return spring 59. When the outer cutter holder 28 is mounted as shown in FIG. 23, the outer cutter holder 28 is simply moved to the swing base 24.
Engagement lock mechanism 32
Locks automatically.

Engagement lock mechanism 31 of the inner blade holder 26
The configuration of is shown in FIGS. 20, 21 and 22. As shown in FIG. 22, a pair of front and rear locking claws 60 are attached to the front and rear of the swing base 24 so as to be movable forward and backward through the opening 61 and to be urged to project by the compression coil spring 62. On the other hand, as shown in FIGS. 17 and 22, left and right thick protrusions 63 are provided in the front and rear of the inner blade holder 26, respectively, and between the left and right thick protrusions 63, a thin wall that is elastically deformable in the front-rear direction. A lower piece-shaped operation knob 64 is provided, and the left and right end portions of the projecting end of each locking claw 60 are provided with a thick protrusion 63.
The inner blade holder 26 is fixed to the swing base 24 at a predetermined mounting position by urging and engaging with the engaging recessed portion 65 provided on the inner surface of the.

As shown in FIGS. 21 and 22, the inner blade holder 2
With 6 engaged and locked, front and rear operation knobs 64
When the pinch is deformed inward, the locking tab 60 is moved backward by the operation knob 64 against the compression coil spring 62 and the engagement lock is released. When mounting the inner blade holder 26, the engagement lock mechanism 31 is automatically locked by simply pushing the inner blade holder 26 into the swing base 24 from above.

FIGS. 1, 24, 25 and 30 show a safety switch mechanism for cutting off and connecting the power supply to the motor 14 when the outer blade holder 28 is attached and detached. The safety switch mechanism includes a safety switch 69 provided on the left side support wall 15L side of the cutting head 2 and an actuating body 72 provided on the left side bracket portion 24L side of the swing base 24. The safety switch 69 has a pair of terminals 70, 71 formed by punching out a conductive metal plate having elasticity on the outer surface of the support wall 15L so that the upper end portions 70a, 71a of the terminals 70, 71a are opposed to each other in the inner and outer directions and overlap each other. . In the normal state, the upper terminal 70 a of the outer terminal 70 is the inner terminal 7
The lower ends of both terminals 70 and 71 are wired and connected to an electric circuit on the board so as to contact the upper end portion 71a of 1 and prevent the energization of the motor 14 from being restrained.

In the bracket portion 24L of the swing base 24,
Actuator 7 for pressing / releasing the outer terminal 70
2 is attached. The actuation body 72 is capable of swinging back and forth integrally with the swing base 24 about the swing axis P of the swing base 24, and is movable back and forth in the direction of the axis P.
It is attached to L. An operating element 72a is projected inward from the operating body 72, and the operating element 72a is attached to the bracket portion 24.
It is inserted into a through hole 74 opened in L parallel to the axis P direction.
Further, an arc-shaped contact portion 72b along the swing direction of the swing base 24 is provided outwardly from the actuation body 72 so as to project outward.
2b is penetrated through the arcuate through hole 73 (see FIG. 12) of the support wall 15L to face the upper end portion 70a of the terminal 70. The actuating body 72 is always urged forward by the coiled spring 68 toward the swing base 24.

When appropriate, the outer blade holder 2 as shown in FIG.
8 is attached, the lower end portion of the left side wall 28L of the outer blade holder 28 is pressed against the operator 72a of the actuating body 72 protruding from the through hole 74 of the swing base 24, and this contact action is performed. As a result, the actuating body 72 is pushed and retracted toward the support wall 15L against the force of the spring 68, and the outward contact portion 72b pushes the upper end portion 70a of the outer terminal 70 outward to elastically displace the inner portion. The terminal 71 is separated from the upper end portion 71a so that the motor 14 can be energized. That is, when the outer blade holder 28 is attached, the motor 14 can be started. When the motor 14 is energized, since the contact portion 72b of the operating body 72 is formed in an arc shape so as to follow the swinging direction of the swing base 24, the operating body 72 is integrated with the swing base 24. Even when swinging back and forth, the contact portion 72b is maintained by keeping the upper end portion 70a of the outer terminal 70 away from the upper end portion 71a of the inner terminal 71.

When the outer blade holder 28 is removed, FIG.
As described above, the actuating body 72 is released from the pressing contacting action by the outer blade holder 28, and thus is moved forward by the spring 68 toward the swing base 24. With this forward movement, the outer terminal 70
Since the pressing action of the contact portion 72b is released, the upper end portion 70a of the contact portion comes into contact with the upper end portion 71a of the inner terminal 71. At this time, even if the drive switch is accidentally turned on by the knob 7, the motor 14 is activated. There is no such thing. When removing the outer blade holder 28, the safety switch 69 is set on the support wall 15L.
Even in the fixed position above, the contact portion 72b of the actuating body 72 is formed in an arc shape as described above, so that the swing base 2
4 is stopped at any swing angle position, the contact portion 7
2b always ensures the upper end 70a of the outer terminal 70
Contact the upper end 71a of the inner terminal 71 with the motor 1
Prevent the power supply to 4 from being restrained. Therefore, it is safe to remove the outer blade holder 28 to clean the rotating inner blades 25F and 25B, or to replace the entire inner blade holder 26.

In the rotary type electric shaver having the above structure,
Only the shaving blade unit 3 with respect to the cutting head 2 having the motor 14 and the gear transmission 23 has the gear transmission 23.
By oscillating and swinging about the axis P of the final transmission gear G8, the shaving blade unit 3 easily follows difficult-to-shave portions such as unevenness of the face and the mandibular region. In this case, FIG.
When the front side of the main body case 1 is directed to the skin H and the shaving blade unit 3 is applied to the skin as shown in FIG.
Tries to be swung in the forward direction A (the direction away from the skin) by the reaction force from the skin H. At this time, when the shaving blade unit 3 is in the position tilted forward from the neutral position, the axis P is The oscillating base 2 in sliding contact with the surface of the final transmission gear G8
The right bracket portion 24R of No. 4 has a frictional sliding contact force received from the final transmission gear G8, and a rotating inner blade 25 that rotates forward.
The shaving blade unit 3 is swung in the rearward direction B due to the sliding contact reaction force received by the outer blades 27F and 27B from the F / 25B, and this acts in the direction of pressing the shaving blade unit 3 against the skin. The adhesion between the shaving blade unit 3 and the skin H is improved, and good sharpness is brought about.

As shown in FIG. 24, a member for swinging the free end of a torsion coil type return spring 76 externally fitted and attached to the support boss 75 of the lock release button 58 on the left side of the cutting head 2 together with the shaving blade unit 3. When the shaving blade unit 3 is in a position tilted rearward from the neutral position by contacting the front end portion of the contact portion 72b of the motor starting and restraining operation piece 72, the shaving blade unit 3 is moved in the B direction. It is also possible to forcibly return the swing of No. 1 to the neutral position by the elastic reaction force of the return spring 76. The frictional sliding contact force from the final transmission gear G8 and the rotating inner blades 25F and 25B to the outer blades 27F and 27B.
As means for slowing the swinging of the shaving blade unit 3 in the forward tilted position in the B direction by the sliding contact reaction force received by FIG.
As shown in FIG. 5, the grease reservoir 9 is provided between the boss of the support wall 15L through which the support shaft 30L is inserted and the boss of the bracket 24L.
1 is provided to slow the swing in the B direction by the viscosity of the highly viscous grease sealed in the grease reservoir 91.

When shaving under the nose or the like, it is easier to use the shaving blade unit 3 so as not to swing, so that the cutting head 2 has a mechanism for fixing and using the shaving blade unit 3. It is mounted on the right support wall 15R. That is, as shown in FIGS. 26 to 28, the slide member 77 is engaged and mounted on the outside of the lid plate 21R mounted on the support wall 15R so as to be vertically movable via a pair of front and rear mounting arms 77F and 77B. At the same time, the pair of elastic arms 77a included in the slide member 77 elastically engages with the group of detent protrusions 78 included in the cover plate 21R, and can be slid and displaced between two upper and lower positions. In addition, the operation portion 77b provided on the slide member 77 has the cap 22R.
It is provided in the opening 79 and can be slid from the outside. Further, the mounting arms 77F / 77
The tip of B is the inner blade holder 26 in the shaving blade unit 3.
Is extended to a position where it can interfere with the right side cover body 33R.

In a normal use state, as shown in FIG. 26, the slide member 77 is in the lower position, and at this time, the mounting arms 77F and 77B are largely separated downward from the right side cover body 33R of the inner blade holder 26. The shaving blade unit 3 does not interfere with the mounting arms 77F and 77B, and the shaving blade unit 3 can freely swing. And
When the slide member 77 is moved to the upper position and held,
The tip of the mounting arm 77F / 77B is the right side cover body 33.
Interferes with the bottom of R. In this case, a recess 80 is formed in the lower end of the front side of the cover body 33R (see FIG. 17). Therefore, as shown in FIG. 27, the rear side of the shaving blade unit 3 is pushed up by the mounting arm 77B. It is fixed in a downward swinging posture, that is, in a posture that is suitable for being easily applied to under the nose.

Although the double inner blade type has been illustrated in the above embodiment, the present invention has a triple inner blade type in which three rotary inner blades 25F (25B) are arranged in parallel, or one rotary inner blade 25F ( 25B) can also be applied to a single inner blade type. In the above embodiment, the safety switch 6
9 is in a non-energized state when the inner terminal 71 and the outer terminal 70 are in contact with each other, and can be energized when separated from each other, but of course, the reverse is also possible. In this case, the terminal 71 is attached with the outer blade attached. The 70 contact each other, and the terminals 71, 70 may be separated from each other when the outer blade is removed. As the drive transmission means of the inner rotary blade 25F (25B), a belt transmission mechanism or a combination of a gear transmission mechanism and a belt transmission mechanism may be used instead of the gear transmission mechanism 23. The same can be applied to a swing type reciprocating electric razor.

[0031]

According to the present invention, the actuating body 72 that moves back and forth as the outer blade holder 28 is attached and detached is provided on the swing base 24 side, and the safety switch 69 that is opened and closed by the actuating body 72 is supported on the support wall. By arranging them on the 15L or 15R side respectively, even in the case of a swing type electric razor, the outer blade holder 28 is removed to remove dust and the inner blade 25F (25F).
B) can be replaced very safely.

[Brief description of drawings]

FIG. 1 is an enlarged view of a left half portion of a cutting head portion of a rotary electric shaver according to the present invention.

FIG. 2 is an overall perspective view.

FIG. 3 is an overall front view.

FIG. 4 is an overall rear view.

FIG. 5 is an overall side view.

FIG. 6 is an overall perspective view with a part cut away.

FIG. 7 is an overall vertical sectional front view.

FIG. 8 is a vertical sectional front view of a cutting head portion.

9 is an enlarged view of the right half of the cutting head section in FIG. 7.

FIG. 10 is a side view showing a transmission mechanism for driving an inner blade.

FIG. 11 is a perspective view of a cutting head unit assembled in a main body case.

FIG. 12 is a perspective view of a cutting head portion.

FIG. 13 is an exploded perspective view of a cutting head portion.

FIG. 14 is a perspective view of the cutting head portion with an outer blade holder removed.

FIG. 15 is a perspective view of the cutting head portion with an inner blade holder removed.

FIG. 16 is a perspective view showing an inner blade holder and an outer blade holder.

FIG. 17 is a perspective view showing a swing base and an inner blade holder.

FIG. 18 is an exploded perspective view of an outer blade holder.

FIG. 19 is an exploded perspective view showing an outer blade and its mounting component.

FIG. 20 is an exploded perspective view of a swing base.

FIG. 21 is a plan view showing the inside of the swing base.

FIG. 22 is a vertical sectional side view showing an engagement lock mechanism of the inner blade holder.

FIG. 23 is a vertical cross-sectional side view showing the engagement lock mechanism of the outer blade holder.

FIG. 24 is a side view showing a safety switch portion.

FIG. 25 is a vertical sectional front view showing a safety switch portion.

FIG. 26 is a side view showing a swing fixing means.

FIG. 27 is a side view showing the swing-fixing means operated in the swing-fixing state.

FIG. 28 is a front view showing the swing-fixing means.

FIG. 29 is an exploded perspective view of the whole.

FIG. 30 is an exploded perspective view of a safety switch portion.

[Explanation of symbols]

 1 Main Body Case 14 Motor 15L / 15R Support Wall 23 Gear Transmission Mechanism (Drive Transmission Means) 24 Swing Base 25F / 25B Rotating Inner Blade 27F / 27B Outer Blade 28 Outer Blade Holder 69 Safety Switch 72 Actuator 72a Manipulator 72b Contact Department

Claims (1)

[Claims] 1. A pair of left and right support walls 15L-1 facing each other.
5R is made to project upward from the upper surface of the main body case 1 containing the motor 14 for driving the inner blade, and the supporting walls 15L and 15R are provided.
A swing base 24 is pivotally supported between the swing base 24 so as to swing back and forth around an axis P, and a rotary or reciprocating inner blade 25F is mounted on the swing base 24.
(25B) while supporting the inner blade 25F (25
In the swing type electric shaver in which the outer blade 27F (27B) covering B) is detachably attached by the outer blade holder 28, one of the support walls 15L and 15R and the swing base 24 face each other. The power supply to the motor 14 is cut off between the surfaces.
The safety switch 69 to connect is the support wall 15L or 15R
On the side, the operating bodies 72 that move forward and backward with the attachment and detachment of the outer blade holder 28 to press and release the safety switch 69 are arranged on the swing base 24 side, respectively. An operator 72a, which comes into contact with the outer blade holder 28 mounted on the side of the swing base 24 on one side surface thereof
Are provided with projecting contact portions 72b for pressing the safety switch 69 on the supporting wall 15L or 15R side on the other side surface, and swing forward and backward around the axis P together with the swing base 24. When the holder 28 is attached, the operating element 72a is pressed and the actuating body 72 is retracted, and the contact portion 72b presses the safety switch 69 to connect the power to the motor 14, and the actuating body 72 is removed when the outer blade holder 28 is removed. Is configured to move forward to release the pressure on the safety switch 69 to cut off the energization to the motor 14, and at least the contact portion 72b of the operating body 72 has an arc shape along the swing direction of the swing base 24. An electric razor of the swing type characterized by being formed in.