WO2021053880A1

WO2021053880A1 - Electric razor

Info

Publication number: WO2021053880A1
Application number: PCT/JP2020/019597
Authority: WO
Inventors: 明彦山口
Original assignee: 佛山有限会社
Priority date: 2019-09-18
Filing date: 2020-05-18
Publication date: 2021-03-25
Also published as: JP6687958B1; JP2021045296A

Abstract

With respect to an electric razor comprising an inner blade, an outer blade which is disposed so as to be laid over the inner blade, and a drive mechanism for causing relative movement between the inner blade and the outer blade, the present invention addresses the problem of increasing the number and speed of relative sliding movements between the inner blade and the outer blade to the extent possible in order to suppress degradation of the cutting ability of the blades and suppressing the progress of abrasion on the inner blade and the outer blade to the extent possible. The electric razor 1 comprises an inner blade 2, an outer blade 3 which is disposed so as to be laid over the inner blade, and a drive mechanism G for causing relative movement between the inner blade and the outer blade, the electric razor 1 being characterized in that the drive mechanism comprises an ultrasonic emitter 4 and a horn 5 which is integrally connected to the ultrasonic emitter in the amplitude direction and amplifies the amplitude of the ultrasonic emitter.

Description

Electric razor

The present invention relates to an electric razor used for, for example, shaving, and particularly to an electric razor having improved sharpness.

Conventionally, as an electric razor used for shaving and the like, as proposed in Patent Document 1, an inner blade and an outer blade slidably attached to the inner blade are provided, and the inner blade is provided with an electric magnet and a spring. It is known that the inner blade is reciprocally slid with respect to the outer blade by reciprocating with a linear drive mechanism consisting of the above, and the whiskers and the like that have entered the inner blade and the outer blade are cut. ing.

Japanese Unexamined Patent Publication No. 2015-21158

By the way, in the above-mentioned conventional technique, since the drive mechanism for reciprocating the inner blade is composed of an electromagnet and a spring, there is a limit to the number and speed of reciprocating movements of the inner blade.

For this reason, it is expected that the speed at the turning position of the reciprocating movement of the inner blade will be significantly reduced, and the sharpness will be reduced.

In addition, since the speed at which the whiskers are cut is low, the resistance applied to the inner and outer blades is large, which causes a problem that the inner and outer blades wear quickly.

The present invention has been made in view of the above-mentioned conventional defects, and includes an inner blade, an outer blade provided so as to overlap the inner blade, and a drive mechanism for relatively moving the inner blade and the outer blade. In the electric razor equipped with, the number and speed of relative sliding between the inner and outer blades is increased as much as possible to suppress the decrease in sharpness and the progress of wear of the inner and outer blades is suppressed as much as possible. It is an issue to be done.

In order to solve the above-mentioned problems, the electric razor of the present invention includes an inner blade, an outer blade provided so as to overlap the inner blade, and a drive mechanism for relatively moving the inner blade and the outer blade. The drive mechanism is integrally connected to the ultrasonic transmitter in the amplitude direction of the ultrasonic transmitter, and includes a horn that amplifies the amplitude of the ultrasonic transmitter. It is characterized by that.

With such a configuration, the vibration generated by the ultrasonic transmitter is amplified by the horn and transmitted to the inner or outer blade, and these inner and outer blades are superimposed. Slide back and forth in the plane direction.

In the state where the inner blade and the outer blade are relatively reciprocated in this way, the whiskers and the like that invade the inner blade and the outer blade are cut.

Here, the vibration generated by the ultrasonic transmitter is 20,000 times per second, and therefore the relative speed between the inner blade and the outer blade becomes high.

As a result, the cutting speed of the whiskers and the like is increased to improve the sharpness, and the resistance at the time of cutting is reduced, and the sharpness is also improved from this point.
Moreover, by reducing the resistance at the time of cutting, the wear of the inner blade and the outer blade is reduced, thereby extending the life of the outer blade and the inner blade and reducing the frequency of replacement of these.

On the other hand, the amplitude of the vibration generated by the ultrasonic transmitter is amplified by the horn and transmitted to the inner or outer blade.

As a result, the reciprocating distance of the inner blade or the outer blade becomes longer.
When the reciprocating distance of the inner blade or the outer blade becomes longer, the cutting area of the whiskers or the like expands, and the cutting efficiency of the whiskers or the like is improved.

The drive mechanism can be connected to either the inner blade or the outer blade.

Further, a link mechanism provided with link pieces having swing ends on both sides centering on the swing shaft is interposed between the inner blade and the outer blade, and each swing end portion of the link piece. It is also possible to connect the inner blade and the outer blade to each other.

With such a configuration, both the inner blade and the outer blade are moved relative to each other in opposite directions, and the relative moving speed of these blades is further increased.

Further, it is possible to provide a plurality of the inner blade and the outer blade.
With such a configuration, the cutting region is widened and the cutting efficiency is improved.

According to the present invention, the number and speed of relative sliding between the inner and outer blades can be increased as much as possible to suppress a decrease in sharpness, and the progress of wear of the inner and outer blades can be suppressed as much as possible.

In the front view which shows the 1st Embodiment of this invention, (a) shows the assembled state, and (b) shows the partially disassembled state. The connection structure of the inner blade and the drive mechanism in the 1st Embodiment of this invention is shown, (a) is a partial sectional front view, (b) is a plan view, and (c) is a partial sectional view of a modified example. The front view, (d) is a view of the assembled state of (c). It shows the 1st Embodiment of this invention and is the schematic diagram of the drive mechanism. It is a vertical sectional view of the main part which shows the 2nd Embodiment of this invention. It is a top view which shows the 3rd Embodiment of this invention.

Hereinafter, the first embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 indicates an electric razor according to the present embodiment.

As shown in FIG. 1, the electric razor 1 has an inner blade 2, an outer blade 3 provided so as to overlap the inner blade 2 in a surface contact state, and these inner blades 2 and outer blades 3. A horn 5 including a drive mechanism G for relative movement, the drive mechanism G being integrally connected to the ultrasonic transmitter 4 in the amplitude direction of the ultrasonic transmitter 4, and amplifying the amplitude of the ultrasonic transmitter 4. And have.

The drive mechanism G is mounted in a bottomed cylindrical casing 6 via a vibration absorbing material 7 such as rubber.

A storage battery 8 for supplying driving power to the ultrasonic transmitter 4 is housed in the bottom of the casing 6, and a tip cover 9 to which an outer blade 3 is mounted is mounted in the opening at the tip. ..

The tip cover 9 is formed in a tubular shape, and has a large-diameter base portion 9a that is detachably attached to the casing 6 via a locking claw 6a formed in the opening of the casing 6, and an axial direction from the base portion 9a. It is provided with a blade mounting portion 9b having a small diameter extending to.

The inner blade 2 is detachably attached to the tip of the horn 5 via a coupler 10, is projected from the opening of the casing 6, and is inserted into the blade attachment portion 9b attached to the casing 6. It has become so.

When the inner blade 2 is inserted into the blade mounting portion 9b, the inner blade 2 is superposed on the outer blade 3 mounted on the side surface of the blade mounting portion 9b in a surface contact state.

As shown in FIG. 2A, the coupler 10 includes an engaging piece 10a that is engaged with the annular locking groove 5a formed at the tip of the horn 5 so as to sandwich the horn 5. A set spring 11 for pressing the engaging piece 10a with the horn 5 is provided, and by engaging the engaging piece 10a with the locking groove 5a from the radial direction of the horn 5, FIGS. 2 (a) and 2 (b) are provided. ), The inner blade 2 is attached to the drive mechanism G.

Then, the vibration evoked by the ultrasonic transmitter 4 of the drive mechanism G is transmitted toward the tip of the horn 5, and the amplitude is indicated by arrows (a), (b), and (c) in FIG. As shown, it is gradually amplified and reaches its maximum at the tip of the horn 5.

The electric razor 1 of the present embodiment configured in this way removes the inner blade 2 by amplifying the vibration generated by the ultrasonic transmitter 4 by the horn 5 and transmitting it to the inner blade 2. It slides back and forth in the surface direction superimposed on the blade 3.

In the state where the inner blade 2 and the outer blade 3 are relatively reciprocated in this way, the whiskers and the like that invade the inner blade 2 and the outer blade 3 are cut.

Here, the vibration generated by the ultrasonic transmitter 4 is about 20,000 times per second, and therefore, the relative speed between the inner blade 2 and the outer blade 3 can be increased.

As a result, the sharpness can be improved by increasing the cutting speed of whiskers and the like and reducing the resistance at the time of cutting.

Moreover, by reducing the resistance at the time of cutting, it is possible to reduce the wear of the inner blade 2 and the outer blade 3, thereby extending the life of the outer blade 2 and the inner blade 3 and replacing them frequently. Can be reduced.

On the other hand, the amplitude of the vibration generated by the ultrasonic transmitter 4 can be amplified by the horn 5, whereby the moving distance of the reciprocating motion of the inner blade 2 can be lengthened.

By increasing the reciprocating distance of the inner blade 2 in this way, the cutting area by the inner blade 2 and the outer blade 3 can be widened, so that the cutting efficiency of whiskers and the like can be improved.

2 (c) and 2 (d) show a configuration in which the connecting structure of the inner blade 2 and the horn 5 is modified.

In this example, the inner blade 2 is provided with an engaging piece 12 having an engaging hole 2a penetrating in the vibration direction, and a coupler 13 connecting the inner blade 2 and the horn 5 is attached to the tip of the horn 5. ..

A stay 14 is provided in the middle portion of the coupler 13 so as to face the tip of the horn 5, and the stay 14 is slidable in the vibration direction of the horn 5 and is closest to the horn 5. A lock pin 15 whose position is regulated is mounted, and a set spring 16 for pressing the lock pin 15 toward the horn 5 is provided.

With such a configuration, the inner blade 2 has its locking piece 12 between the lock pin 15 and the tip of the horn 5, and the lock pin 15 is separated from the horn 5 while compressing the set spring 16. Push it in.

Then, when the engagement hole 2a of the locking piece 12 is superposed on the lock pin 15, as shown in FIG. 2D, the lock pin 15 is moved to the engagement hole 2a by the elastic force of the set spring 16. Engage in.

As a result, the inner blade 2 can be attached to the tip of the horn 5.
Further, the inner blade 2 can be removed from the horn 5 by the reverse operation.

FIG. 4 shows a second embodiment of the present invention.
In the electric razor 20 of the present embodiment, a link mechanism L having a link piece 21 having swing ends 21 on both sides centered on the swing shaft 21a is interposed between the inner blade 2 and the outer blade 3. , The inner blade 2 is connected to one swinging end of the link 21 piece, the outer blade 3 is connected to the other end of the link piece 21, and the inner blade 2 is further connected to the horn 5 via the coupler 13. The configuration is as follows.

With such a configuration, the operation of the link mechanism L is essential. As shown by the solid line arrow and the broken line arrow in FIG. 4, the inner blade 2 and the outer blade 3 are relatively moved in opposite directions to each other. These relative movement speeds can be further increased.

Further, in the above-described embodiment, an example in which one set of the inner blade 2 and the outer blade 3 is used is shown, but it is also possible to use two sets of these as in the third embodiment shown in FIG. Furthermore, it is possible to use three or more sets.

Note that the various shapes, combinations, dimensions, etc. of each component shown in each of the above embodiments are examples, and can be variously changed based on design requirements and the like.

For example, the inner blade 2 may be fixed and the outer blade 3 may be connected to the horn 5 so that the outer blade 3 is relatively moved to the fixed inner blade 2.

1 Electric razor 2 Inner blade 2a Engagement hole 3 Outer blade 4 Ultrasonic transmitter 5 Horn 5a Locking groove 6 Casing 6a Locking claw 7 Vibration absorber 8 Storage battery 9 Tip cover 9a Base 9b Blade mounting part 10 Coupler 10a Engagement Piece 11 Set spring 12 Locking piece 13 Coupler 14 Stay 15 Lock pin 16 Set spring 20 Electric razor 21 Link piece 21a Swing shaft G Drive mechanism L Link mechanism

Claims

An electric razor including an inner blade, an outer blade provided so as to overlap the inner blade, and a drive mechanism for relatively moving the inner blade and the outer blade, and the drive mechanism is an ultrasonic wave. A transmitter and a horn that is integrally connected in the amplitude direction of the ultrasonic transmitter and amplifies the amplitude of the ultrasonic transmitter are provided, and the inner blade is detachably attached to the tip of the horn via a coupler. This coupler is an electric razor characterized by having an engaging piece that is engaged so as to sandwich the tip of the horn and a set spring that presses the engaging piece against the horn.
A link mechanism having a link piece having swing ends on both sides centered on the swing shaft is interposed between the inner blade and the outer blade, and one swing end of the link piece is interposed. The electric razor according to claim 1, wherein the inner blade is connected and the outer blade is connected to the other end of the link piece.
The electric razor according to claim 1 or 2, wherein a plurality of the inner blade and the outer blade are provided.