JPH01300979A - Electric shaver - Google Patents

Abstract

PURPOSE:To provide ease of attaching an inner blade on an inner blade attachment by attaching the inner blade attachment with the inner blade free to slide along a rotary spindle penetrating the bottom wall of a shaving dust receiver, and providing magnets that repulse each other on the surfaces of the inner blade attachment and the bottom wall facing each other. CONSTITUTION:A rotary spindle 4 is provided penetrating the bottom wall 2a of a shaving dust receiver 2, and an inner blade attachment 12 fitted with inner blades 13 is attached from to slide along the rotary spindle 4. Magnets 17 and 7 that magnetically repulse each other are attached on the end of the inner blade attachment 12 and the bottom wall 2a respectively so that the inner blade attachment 12 usually tends to slide upward causing the inner blade 13 to be pressed against an outer cutter 10. The magnets 17 and 7 can be easily attached, and when an electric magnet is adopted to the magnet 7, the repulsion force is controllable by regulating electrical current to be applied, so that the compression force of the inner blade 13 against the outer cutter 10 is also adjustable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric shaver with an improved structure for applying blade pressure.

[Conventional technology]

The blade pressure applying structure that presses the inner cutter a against the outer cutter is, as shown in Fig. 7, in a rotary electric shaver, the mounting provided on the inner cutter stand C allows the inner cutter a to be moved vertically into the hole d. At the same time, a wire spring (in some cases, a leaf spring) is attached to the lower surface of the inner cutter base C corresponding to the inner cutter a, and the tip of the wire spring e is attached to the lower end of the inner cutter a. It is inserted through a small hole f drilled in the part, and the inner cutter a is urged by the spring force of a wire spring e and pressed against the outer cutter.

In addition, as shown in Fig. 8, in a reciprocating electric shaver, an inner blade drive member i is integrated with a drive base j to convert eccentric rotation about an eccentric axis relative to a rotation axis g into a reciprocating motion in the left and right direction. A coil spring is wound around the shaft k, and the spring force of the coil spring biases the entire inner cutter m attached to the drive shaft k, and the inner cutter fixed to the inner cutter m is A is pressed against the outer blade.

[Problem to be solved by the invention]

As mentioned above, in the past, spring material was used to apply blade pressure, so in reciprocating type models, the coil springs often accidentally fly off during assembly. As a result, there were problems such as loss of coil springs, resulting in waste, and assembly was difficult. Furthermore, when the inner cutter body is removed from the drive shaft for cleaning, a stopper structure is required to hold the coil spring so that it does not get lost. It was also troublesome to put on and take off the body.

The rotary type uses a large number of wire springs, and since these wire springs are thin and small in shape, they are difficult to handle and difficult to assemble.

In addition, in any type of electric shaver, it is necessary to increase the spring force in order to adjust the variable blade pressure, and in that case, the inner blade body must be removed, so it is difficult to adjust the blade pressure during use. It was impossible to adjust the blade pressure arbitrarily.

The present invention aims to provide a rotating type electric shaver that is easy to assemble and handle, and furthermore, a reciprocating type electric shaver that is similarly easy to handle and whose inner cutter body can be easily attached and detached. The object of the present invention is to obtain a razor, and a further object is to obtain a rotary and reciprocating electric shaver whose blade pressure can be arbitrarily adjusted during use.

[Means to solve the problem]

In order to achieve the above object, the rotary electric shaver of the present invention has a rotary shaft inserted through the bottom wall of the shavings tray of the main body case, and is slidably rotated by the rotary shaft along the axial direction. In addition, magnets are provided on mutually opposing surfaces of the inner cutter base of the inner cutter body and the bottom wall to form a magnetic repulsion effect therebetween.

Further, the inner blade drive member is provided with an inner blade drive member that converts eccentric rotation of the eccentric shaft with respect to the rotating shaft into a reciprocating motion in the left and right direction, and a drive shaft of the inner blade drive member that protrudes from the upper wall of the main body case in which this drive member is installed. In a reciprocating electric shaver in which an inner cutter body is attached to, in order to achieve the above object, the inner cutter base of the inner cutter body is slidable along the axial direction of the drive shaft. A permanent magnet is provided on the inner cutter base, and a magnet is provided on the upper wall of the drive base or the main body case to form a magnetic repulsion effect between the two and the permanent magnet.

Furthermore, in a rotary or reciprocating electric shaver, in order to achieve the above purpose, the magnet attached to the main body case side is formed of an electromagnet, and a current control section is inserted into the energization circuit of this electromagnet. This is what I did.

[Effect]

In the rotary or reciprocating electric shaver configured as described above, a magnet is provided on the inner cutter base of the inner cutter that is slidably fitted to the rotating shaft or the drive shaft, and a magnet is provided on the main body case side. Magnets (which can be permanent magnets or electromagnets) form magnetic repulsion between them, so
In response to this repulsive force, the inner cutter body is pressed against the outer cutter of the outer cutter body.

Further, for the above-mentioned reasons, the inner blade of the reciprocating electric shaver can be attached by simply slidingly fitting it onto the drive shaft, making it easy to attach and detach the inner cutter to the drive shaft.

In addition, the magnet provided on the main body case side is an electromagnet, and the current control unit inserted into the current-carrying circuit controls the magnitude of the magnetic force of the electromagnet, so by adjusting it, the magnitude of the magnetic repulsion can be adjusted. Works to change arbitrarily as needed.

〔Example〕

A first embodiment in which the present invention is applied to a rotary electric shaver shown in FIGS. 1 and 2 will be described below.

1 in the figure is the main body case, and there are 2 shavings receptacles on the top.
is formed. The beard shavings receiver 2 has a cylindrical shape with a bottom,
A male thread groove is formed on its outer peripheral surface. A motor 3 built into the main body case 1 is fixed to the bottom wall 2a of the hair shavings receiver 2, and a rotating shaft 4 of the motor 3 is inserted through the bottom wall 2a. Note that 5 in FIG. 1 is an O-ring-shaped backing that prevents hair chips from entering the main body case 1 through the insertion portion of the rotating shaft 4.

Then, the upper surface of the bottom wall 2a, that is, the inner cutter stand 12 to be described later.
A magnet 7 is attached to the opposite surface. The magnet 7 is a ring-shaped permanent magnet magnetized along its thickness direction. Note that the magnet 7 is attached via an adhesive or is attached to the main body case 1 by insert molding.

Reference numeral 8 denotes an outer cutter body, which is formed from an outer cutter stand 9 and an outer cutter 10 attached to the outer cutter stand 9, and the inner surface of the outer cutter stand 9 has a female thread groove that is screwed into the above-mentioned male thread groove. It is provided. This outer cutter body 8 is detachably screwed into the shavings receiver 2 and attached thereto.

The inner cutter body 11 is removably attached to the rotating shaft 4 and is fitted to be slidable along the axial direction of the rotating shaft 4. This inner cutter body 11 is formed from an inner cutter base 12 made of resin and a plurality of inner cutters 13 implanted on the upper surface of this base 12 by insert molding.

In addition, a fitting hole 14 is provided in the center of the inner cutter base 12 and opens on the lower surface thereof, and an engagement step 15 formed at the back of the fitting hole 14 and a flat portion 16 formed on the rotating shaft 4 are provided. By engaging with the rotary shaft 4, the rotary shaft 4 is rotated integrally with the rotary shaft 4.

Further, a magnet 17 is provided on the lower surface of this inner cutter stand 12 so as to face the magnet 7 described above. This magnet 7 also uses a ring-shaped permanent magnet that is magnetized along its thickness direction, and this magnet 17 is attached via adhesive or is attached to the main body case 1 by insert molding. It is being

The polarities of the opposing surfaces of this magnet 17 and the magnet 7 are the same, and a magnetic repulsion is formed between them to apply the necessary blade pressure to the inner cutter 13.

In such a configuration, the inner cutter body 11 is inserted into its fitting hole 1.
4 is fitted and attached to the rotating shaft 4, the magnets 7 and 17 are closely opposed to each other, and due to the magnetic repulsion force formed between them, this force and the weight of the inner blade body 11 are combined. ,
The inner cutter body 11 is fitted and held at the tip of the rotating shaft 4 so as not to come off. When the outer blade 8 is screwed in and attached to the upper part of the main body case 1 in this state, the entire inner blade 11 is pushed down against the magnetic repulsion.

Then, since the magnets 7 and 17 come closer together, the magnetic repulsion between them becomes stronger, and the inner cutter 13 of the inner cutter body 11 is pressed against the outer cutter 10 of the outer cutter body 8, applying the necessary blade pressure. It is something that will be done.

Since magnetic repulsion is used to apply blade pressure as described above, wire springs and leaf springs that were conventionally required can be omitted, and furthermore, the inner blade body 11 is a single molded part. So,
The number of parts during assembly can be reduced, and the troublesome effort of attaching the inner cutter 13 to the inner cutter stand 12 together with the spring material can be omitted, and therefore assembly can be facilitated.

Next, a second embodiment in which the present invention is applied to the reciprocating electric shaver shown in FIGS. 3 and 4 will be described.

Reference numeral 21 in FIG. 3 is a main body case, and an outer blade 22 is removably attached to the upper part of the case 21, covering the upper wall 21a of the case 21. The outer cutter body 22 is formed from an outer cutter stand 23 and an outer cutter 24 detachably attached to the outer cutter stand 23. A motor 26 is fixed to the lower surface of a base plate 25 built into the main body case 21, and an inner blade drive member 27 is fixed to the upper surface. The inner blade drive member 27 is an elastic resin molded product, and as shown in detail in FIG. 4, it integrally connects a pair of fixing parts 28 fixed to the base plate 25 and a drive stand 29. Flexible deformation section 30
and a drive shaft 31 integrally protruding from the upper surface of the drive base 29.

The flexible deformation section 30 allows the drive base 29 to move in the left and right direction by its flexible deformation.

A cam groove 32 opening on the lower surface of the drive base 29 is provided along a direction perpendicular to the moving direction of the drive base 29, and an eccentric shaft 33 is engaged with this groove 32. The eccentric shaft 33 is protruded from a balancer 35 fixed to the rotation shaft 34 of the motor 26 at a position eccentric from the rotation shaft 34 . Therefore, the rotation of the rotary shaft 34 is caused by the engagement between the eccentric shaft 33 that rotates eccentrically relative to the rotation shaft 34 and the cam groove 32, and the movement of the drive base 29 in the left and right direction accompanied by the flexible deformation of the flexible deformation section 30. This is converted into reciprocating motion.

A magnet 36 is attached to the upper surface of this drive base 29. A ring-shaped permanent magnet is used as the magnet 36, and is magnetized along the thickness direction. Note that this magnet 36 is attached via an adhesive or is attached to the inner blade drive member 27 by insert molding.

The drive shaft 31 has a stepped shape, and its small diameter side extends through a through hole 37 provided in the upper wall 21 and projects out of the main body case 21. A flexibly deformable beard debris intrusion prevention sheet 38 is attached to the drive shaft 31, and this sheet 38 is provided to close the through hole 37. An inner blade body 39 is detachably attached to the drive shaft 31.

The inner cutter body 39 has a large number of arch-shaped inner cutters 41 arranged side by side at regular intervals on an inner cutter base 40 made of resin or the like, and a fitting hole 42 is provided in the center of the inner cutter base 40. It is provided.

The inner cutter stand 40 is attached to the drive shaft 31 by fitting the fitting hole 42 into the drive shaft 31 so as to be slidable along the axial direction thereof. A magnet 43 is provided on the lower surface of the inner cutter stand 40 in correspondence with the magnet 36 described above. This magnet 43 uses a permanent magnet that is magnetized along its thickness direction, and this magnet 43 is attached via an adhesive or insert molded to the inner cutter stand 40. installed. The polarities of the facing surfaces of this magnet 43 and the magnet 36 are the same, and a magnetic repulsion is formed between them to apply necessary blade pressure to the inner cutter 41.

In such a configuration, the inner blade body 39 is inserted into its fitting hole 4.
2 is fitted onto the drive shaft 31 and installed, the magnet 36.43
Since the comrades meet with the upper wall 21a of the main body case 21 in between, the magnetic repulsion force formed between them causes
Due to this force and the weight of the inner cutter body 39, the inner cutter body 39 is fitted and held at the tip of the drive shaft 31 so as not to come off.

When the outer blade 22 is attached to the upper part of the main body case 21 in this state, the entire inner blade 39 is pushed down against the magnetic repulsion. Then, the magnet 36
．． 43 are closer to each other, the magnetic repulsion between them is strengthened, and the inner cutter 41 of the inner cutter body 39 is closer to the outer cutter 2 of the outer cutter body 22.
4 to apply the necessary blade pressure.

Therefore, since the coil spring that was conventionally required can be omitted, handling during assembly is facilitated, and assembly is facilitated. Moreover, since the coil spring is omitted, there is no need for a stopper structure to prevent the inner cutter body 39 from coming off from the drive shaft 31, which not only simplifies the structure, but also allows the inner cutter body 39 to be driven. Since the inner cutter body 39 can be simply slidably fitted onto the shaft 31 and removed from the drive shaft 31 by simply pulling it out, the inner cutter body 39 can be easily attached to and removed from the drive shaft 31.

Furthermore, the third embodiment of the present invention shown in FIG.
In the configuration of the embodiment, the magnet 36 is formed of an electromagnet, and a current control section 44 is inserted into a current supply circuit for the electromagnet 36.

The current control unit 44 can be arbitrarily adjusted on the outer surface of the main body case 21, and although a variable resistor is used in the case shown in the figure, the current control unit 44 is not limited to this. From the selection switch to be selected to the current control unit 44
may be formed. The energizing circuit has an on/off switch 45 and a power source 46. Note that the configuration other than the fishing gear described above is the same as that of the second embodiment, so a description thereof will be omitted.

In this third embodiment, since the current control section 44 is configured to control the same amount of electricity as in the second embodiment, the magnitude of the magnetic force generated by the magnet 36 can be adjusted by the current control section 44. Through this adjustment, the magnitude of the magnetic repulsion between the opposing magnets 36 and 43 can be changed arbitrarily as needed, so there is an advantage that the blade pressure can be adjusted arbitrarily during use depending on conditions such as the thickness of the beard. .

It goes without saying that the technical concept of the third embodiment can also be applied to the rotary electric shaver shown in the first embodiment.

A fourth embodiment of the present invention shown in FIG.
The magnet 36 provided on the side is connected to the upper wall 21 of the main body case 21.
It is attached to the upper surface of a, and the magnet 43 provided on the inner cutter stand 40 is attached so as to face the magnet 36.
The rest of the configuration is the same as that of the second embodiment, so the explanation thereof will be omitted. Also in this embodiment, the intended purpose of the present invention can be achieved.

Note that the present invention is not limited to the above-mentioned embodiments. For example, in the case of a magnet provided in the inner cutter stand, magnetic particles or powder are mixed into the resin material forming the inner cutter stand, and the magnet is integrated with the inner cutter stand. may be provided.

〔Effect of the invention〕

As described above, according to the present invention, in the rotary or reciprocating electric shaver of claim 1.2, the magnetic repulsion between the magnet provided on the inner blade body and the magnet provided on the main body side is reduced. In the electric shaver according to claim 3, the spring member for applying blade pressure is omitted, and the electromagnet on the main body case side is controlled by the current control section to generate the magnetic force. Since it has a structure that allows you to adjust the repulsive force, you can adjust the blade pressure arbitrarily during use.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention;
The figure is a cross-sectional view of the upper part of the razor, and FIG. 2 is a perspective view showing the upper part of the main body case and the inner cutter separated from the upper part. Third
4 and 4 show a second embodiment of the present invention, FIG. 3 is a partially sectional front view, and FIG. 4 is a perspective view of the inner cutter drive member and the inner cutter body supported by the inner cutter drive member. It is a diagram. FIG. 5 is a perspective view showing essential parts of a third embodiment of the present invention. FIG. 6 is a partially sectional front view of a fourth embodiment of the present invention. FIG. 7 is a sectional view showing the upper part of a conventional rotary electric shaver, and FIG. 8 is a partially sectional front view of a conventional reciprocating electric shaver. 1.21... Main body case, 2... Beard scraps receptacle, 2
a... Bottom wall, 4, 34... Rotating shaft, 7.36...
Magnet, 11.39... Inner blade body, 12.40... Inner cutter stand, 17.43... Magnet, 21a... Upper wall, 27.
...Inner blade drive member, 29...Drive base, 31...Drive shaft, 33...Eccentric shaft, 44...Current control unit. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Scope of Claims] 1. In a rotary type, an inner blade body is rotated by the rotating shaft so as to be slidable along the axial direction of the rotating shaft inserted through the bottom wall of the shavings receptacle of the main body case. 2. An electric shaver characterized in that magnets are provided on mutually opposing surfaces of the inner cutter base of the inner cutter body and the bottom wall to form a magnetic repulsion effect therebetween. 2. A drive shaft of the inner cutter drive member that is provided with an inner cutter drive member that converts the eccentric rotation of the eccentric shaft with respect to the rotating shaft into a reciprocating motion in the left and right direction, and that protrudes from the upper wall of the main body case in which the drive member is installed. In the reciprocating type with an inner cutter body attached to the inner cutter body, the inner cutter base of the inner cutter body is slidably fitted to the drive shaft along the axial direction thereof, and
An electric shaver characterized in that a magnet is provided on the inner cutter stand, and a magnet that forms a magnetic repulsion effect with the magnet is provided on the drive stand or the upper wall of the main body case. 3. The electric shaver according to claim 1 or 2, wherein the magnet attached to the main body case side is formed of an electromagnet, and a current control section is inserted into the energization circuit of the electromagnet.