WO2024053439A1

WO2024053439A1 - Electric nail filer

Info

Publication number: WO2024053439A1
Application number: PCT/JP2023/030838
Authority: WO
Inventors: 猛阿部
Original assignee: 東都産業株式会社
Priority date: 2022-09-05
Filing date: 2023-08-21
Publication date: 2024-03-14
Also published as: JP2024036261A

Abstract

Conventional electric nail filers are basically structured so as to shorten fingernails, and have problems that should be addressed, including the disadvantage for being unable to handle toenails that are too thick for a nail insertion opening thereof and the issue of failing to constantly file fingernails to have a uniform length when performing nail care. The method for removing filed nails has also been an issue. Said issue is attributed to the ill-formed shape of the nail insertion opening and the inappropriate way for arranging a filed nail powder removal fan. The present invention solves the problems by separately arranging hyponychium-abutting tip members in the upper part and lower part inside a file cover, and using the space between the upper and lower parts as a nail insertion opening for separately filing a fingernail and a toenail. Filing is performed by inserting and abutting an outer surface of the hyponychium-abutting tip member to a hyponychium at a fingertip, and bringing a nail into contact with a rotary file. For removing filed nail powder, a hose connection port is provided to the outer circumference of the file cover, a hose is connected thereto, and suctioning is performed by an external vacuum cleaner.

Description

electric nail sharpener

The present invention relates to an electric nail sharpener that sharpens nails by rotating a rotary file with a motor.

According to Patent Document 1 below, a conventional electric nail sharpener has a motor 6 built into a case 2, a rotary file 7 for a cylindrical vertical shaft attached to the upper end of the case, and a file storage part 3. , there is one in which a substantially square claw insertion hole 31 is attached. Additionally, a fan 8 is attached inside the file storage 3 to suck up the shavings. There is a device in which the cylindrical vertical shaft rotary file 7 and the supporting shaft surface (output shaft) 61 are oriented toward the vertical axis to sharpen nails. (For example, see Patent Document 1)
Furthermore, in the conventional electric nail sharpener as described above, a file cover is placed over the outer periphery of the rotary file for the cylindrical vertical shaft, and nails formed in a substantially square shape are inserted into the outer surface of the file cover. A mouth opening is provided, and this is also used to sharpen nails with a rotating file and the spindle surface facing the vertical axis. (For example, see Non-Patent Document 1)
Furthermore, a rotary cylindrical file for the horizontal axis is built into the file cover of the cylindrical main body case, and a claw insertion opening is provided along the horizontal axis surface of the rotary file for the horizontal axis. There is one that sharpens nails with the spindle surface facing the horizontal axis.
(For example, see Non-Patent Document 2)

Japanese Patent Application Publication No. 10-201525

Patent Document 1 and Non-Patent Document 1 have a cylindrical vertically rotating file built into a main body case containing a motor, and when in use, the main axis of the main body case and the rotating file are oriented vertically to sharpen nails. Since this is the basic principle, it is referred to herein as a rotary file for a cylindrical vertical axis.
In Non-Patent Document 2 and Drawing 8 of this specification, a cylindrical horizontal-axis rotary file is built in, and a claw insertion opening is provided along the spindle of the horizontal-axis rotary file.
When using these, it is basic to sharpen nails with the rotary file and the support shaft oriented laterally, so they are referred to herein as rotary files for cylindrical horizontal shafts.
As mentioned above, there are two types of rotary shafts for cylindrical rotary files: a rotary file type for the vertical axis and a rotary file type for the horizontal axis.
1 to 7 of Embodiments 1 to 4 of the present invention, which will be described below, have a rotary file for a cylindrical vertical axis, and FIG. 8 of Embodiment 5 shows a rotary file for a cylindrical horizontal axis. It is located.
The electric nail sharpeners described in Patent Document 1 and Non-Patent Document 1 both rotate a rotary file for a cylindrical vertical axis built into a file cover of a main body case, and these rotary files for a cylindrical vertical axis. A file cover was placed over the outer periphery of the file cover, and a nail was inserted into the outer surface of the file cover through a nail insertion opening formed in a substantially rectangular shape to make a short cut.
There is a problem in that it is not possible to guide the tips of the toes and fingers in a U-shape along the cylindrical outer peripheral surface of the rotary file to shave the nails through such a substantially square nail insertion opening.
This is because the claw insertion opening is formed as a substantially square opening, and the claw insertion opening is not formed in a U-shape along the cylindrical outer peripheral surface of the rotary file.
Because the shape of the nail insertion opening is approximately square, you can simply insert the nail and file it short, but if you want to extend the tip of the nail to a certain length and file it for nail care (nail beautification), etc., you can use a rotating file. When they come into contact, the rotational vibration causes the toes and fingertips to shake, causing the lengths of each nail to be uneven, causing the problem that the nails cannot be scraped evenly.
In the shape of the approximately square nail insertion opening according to Patent Document 1 and Non-Patent Document 1, unlike the shape of the tip-like edge provided in the subungual skin contacting tip member of the present specification described below, the shape of the nail insertion opening is The shape of the nail insertion opening made it impossible to insert the nail into the subungual skin and touch it against the subungual skin.
The above-mentioned application to the subungual skin means to firmly attach it to the subungual skin at the back of the nail and press it slightly. The hypoungual skin, which is the name of the nail, is located at the base (base) that attaches between the back side of the toe and the fingertip, and is also called hyponychium (see hyponychium 33 in Figure 2). ). The direction of the nail plate side edges 26 at both the left and right ends described below is also the name of the nail, and is commonly known as the stress point (load point) position of the nail.
In addition, a suction fan 8 for sucking up nail shavings is built into the file storage section 3 shown in Patent Document 1, and if the nail shavings accumulate inside, cleaning becomes difficult.
The present invention aims to solve the problems of the conventional configuration as described above, and the subungual skin abutment tip member is inserted into the file cover attached to the main body case of the present invention through a rotating file. are placed separately on the upper and lower sides, and the tip of either the upper or lower subungual skin is applied to the subungual skin on the back of the nail while contacting the rotating file and scraping, and the outer periphery of the file cover and the vicinity of the nail insertion opening. The goal is to construct a fingertip movement space and a guiding concave wall surface that serve as a guiding path for guiding the fingertip.
Furthermore, the subungual skin abutting tip member is moved forward and backward, and the forward extension width is adjusted.As a nail beauty, the length of the nail can be freely adjusted and scraped to adjust the length and shape of the nail. It is.
In addition, the purpose is to remove nail shavings that accumulate inside the file cover by connecting a hose to an external vacuum cleaner or the like.

In an electric nail sharpener in which a motor in the main body case is connected to a rotary file for a cylindrical vertical shaft in a file cover, as shown in FIGS. 1 to 7 of this specification, the rotary file for a cylindrical vertical shaft is The outer circumferential end surface 36 of the subungual skin abutment tip member 4, which is arranged separately into an upper and a lower part via a 5, is formed into a semicircular U-shaped, approximately semi-elliptical shape, and forms a nail insertion opening 8, A tip-shaped edge is formed on the outer peripheral end surface 36, and the tip-shaped edge is inserted up to the subungual skin 33 on the back of the nail, and while abutting against the subungual skin, the nail is brought into contact with the rotary file 5 to sharpen the nail. I do.
In addition, the outer peripheral end surface 36 of the subungual skin applying tip member 4 is formed into a substantially semi-elliptical shape of the semicircular U shape with respect to the outer peripheral surface of the file cover 3 on which the subungual skin applying tip member 4 is arranged. A fingertip movement space 15 and a guiding concave wall surface 18 are formed along the tip-shaped edge.
The purpose is to guide the fingertips and toes along a substantially semielliptical shape of the semicircular U shape.
Further, the outer circumferential end surface 36 facing the front 7 side of the subungual skin abutment tip member 4 is moved in the front direction 7 and separated from the rotary file 5, so that the forward extension width of the subungual skin abutment tip member 4 is moved. 17 to be able to adjust entry and exit.
By doing so, the forward extension width 17 can be adjusted in and out by adjusting the length for shaving the toes of fingers for nail care (beautification of nails), etc., and the shape of the U-shaped subungual skin contact tip member 4 can be adjusted. Guide your fingertips along the lines to adjust the length and shape of your nails.
In addition to the above-mentioned means, there is an electric nail sharpener in which a motor in the main body case is connected to a rotary file type for the cylindrical horizontal shaft in the file cover, as shown in FIG. 8 of this specification. Via the axis-oriented rotary file 5, along the direction of the horizontal axis of the rotary file, the front end surface 40 on the side of the nail insertion opening 8 by the subungual skin abutment tip member 4 arranged separately in the upper and lower parts, It forms a pointed edge.
In addition, the outer surface of the subungual skin abutment tip member 4 is formed by covering it in a rounded shape along the cylindrical outer circumferential surface of the cylindrical horizontal axis rotating file 5, and The purpose is to provide a fingertip movement space 15 that serves as a guide path for the fingertip.
The tip-like edge is inserted into the subungual skin of the back of the nail, and the nail is brought into contact with the rotary file 5 while being placed against the subungual skin, and the nail is shaved while guiding the fingertip along the fingertip movement space 15. .
Also for the rotary file 5 for the cylindrical horizontal axis, the front end face 40 facing the front 7 side of the lower subungual skin abutment tip member 4 is moved in the direction of the front 7 side to rotate the file 5 for the cylindrical horizontal axis. Separate from the rotary file 5 and adjust the forward width 17 of the subungual skin abutting end member 4 serving as the lower part.
In an electric nail sharpener that connects a motor inside the main body case and a rotating file inside the file cover, a hose connection port is provided on the outer periphery of the file cover to connect the hose, and suction from a vacuum cleaner or the like is provided from the outside. By this method, nail shavings inside and outside the file cover are removed by suction.
In the above, it is explained that the upper and lower subungual skin abutment tip members are separated and used, but the method of arranging the upper and lower parts is for convenience and ease of handling, and this fact is not explained here. It is also described in

claims

1 and 3 of the present patent claims.
However, it is not always necessary to separate the upper and lower parts of the subungual skin contacting end members, and depending on the application, it may be useful to use only one of the upper and lower subungual skin contacting end members separately. This method is described as an example starting from the second line of the top row of page 14 below.

The tip-shaped edge of the subungual skin contact member 4, which is separated into upper and lower parts, slightly presses against the subungual skin of the finger and toenails to prevent them from moving and prevents shaking of the toes and fingertips. Can be easily scraped. In addition, the pointed edge that rests on the subungual skin acts as a stopper to prevent the nail from being cut too deeply, making it safe.
The outer periphery of the upper and lower subungual skin abutting end members 4 disposed on the rotary file 5 for the vertical axis is formed into a substantially semi-elliptical shape with a semicircular U shape, and the outer circumferential surface of the file cover 3 is also shaped like the semicircular U shape. By providing the fingertip movement space 15 and the guiding concave surface 18 along a substantially semi-elliptical shape, the guiding path of the fingertip is facilitated, and the nail plate side edges 26 at both left and right ends can be shaved short to adjust the shape of the nail. be able to.
The guiding path of the fingertip is also facilitated in the fingertip movement space 15 outside the outer surface of the subungual skin abutting tip member 4 formed and arranged on the substantially rounded outer surface of the rotary file for the horizontal axis shown in FIG.
By rotating the movable operating knob 21 connected to the subungual skin abutting end member 4, the subungual skin abutting end member 4 is moved in seven directions forward, separated from the rotary file 5, and moved away from the rotating file 5 to extend forward width 17. By adjusting the nails, you can freely and evenly shave the length of your nails to a certain length, and you can adjust the shape when dressing your nails.
A thin bellows hose 27 is connected to the hose connection port 19 provided on the outer periphery of the file cover 3, and connected to a vacuum cleaner from the outside. It is easy to clean by suctioning and removing dust, and it can be kept clean at all times.

Fig. 1 is a partial cross-sectional side view of the first embodiment of the present invention when using a rotary file for vertical axis. , Same as above, a front view seen from the left side of FIGS. 1 and 2. FIG. FIG. 6 is a side partial cross-sectional view of the second embodiment of the rotary file system for vertical shafts. FIG. FIG. 8 is a single subungual skin abutment tip member showing a fourth embodiment, in which (a) is a plan view and (b) is a side sectional view taken along line B-B in (a). A side partial sectional view showing the embodiment when using a rotary file type for the horizontal axis

Embodiment 1 The embodiment 1 of the present invention will be described below based on FIGS. 1 to 4. As the name suggests, the subungual skin abutment tip member 4 of the present invention is a tip member for abutting against the subungual skin (base).
To explain based on Embodiment 1 shown in FIGS. 1 to 4, a file cover 3 is connected to the upper surface of the main body case 2 in which the motor 1 is built, and subungual skin pads are placed in the upper and lower parts of the file cover 3. The tip members 4 are arranged separately.
The side surface shape of the upper and lower subungual skin abutment tip members 4 is formed into a U-shape in Japanese Katakana, and these are integrated, and the planar outer periphery is approximately semi-elliptical with a semicircular U shape (Figs. 4 and 4). (see FIG. 7), a bevel 9 is provided on the outer peripheral end face 36 along the substantially semi-elliptical shape, and the bevel chamfers 9 are formed on the inclined face of the staggered bevels 9 on both the upper and lower sides, so that the outer peripheral end face 36 has a protruding end. Configure the edges.
A rotary file 5 for the vertical axis, which is cylindrical and extends in the longitudinal direction, is sandwiched between the upper subungual skin contact tip member 4 and the lower subungual skin contact tip member 4, and is mounted in a sandwich manner. 5 and the file support shaft 6 are connected by a connecting output shaft 24 (see FIG. 1), and rotated by the motor 1.
In addition, the front 7 and rear 11 described below are shown in the left and right direction with respect to the side view in FIG. 1, and the front view in FIG. As shown in FIGS. 1 to 4, the outer circumferential end surface 36 of the tip facing the front 7 side of the upper and lower subungual skin abutment tip members 4 is shaped in a semicircle so as to follow the rounded shape of the cylindrical file surface 10. Form into shape. Then, while maintaining the parallel width 12 (see FIG. 4), the planar outer circumferential end surface 36 of the upper and lower subungual skin abutting tip members 4 is formed into a semicircular U-shaped approximately semielliptical shape. (See Figure 4).
Each of the upper and lower subungual skin contact tip members 4 is a thin flat plate with a thickness of about 2 mm, and a bevel 9 is provided on the outer peripheral end surface 36 along the semicircular U-shaped outer periphery to form a tip-like edge. The gap between the upper subungual skin contact tip member 4 and the lower subungual skin contact tip member 4 is approximately 3 mm, and a nail insertion opening 8 (see Figures 1 and 2) is provided to accommodate thick feet. Allows nails to be inserted.
A passage hole 20 (see FIGS. 1 and 4), which is an elliptical hole, is used to pass the file support shaft 6 (see FIGS. 1 and 4) through the upper and lower subungual skin contact end members 4 formed in this way. are provided so as to penetrate through the upper and lower subungual skin abutment tip members 4.
In addition, as shown in FIGS. 1 and 4, on the rear surface of the upper and lower subungual skin contact tip members 4,
The movable operation knob 21 equipped with a threaded bolt 38 (see FIGS. 1 and 4) for moving the upper and lower subungual skin abutment tip members 4 in the forward direction 7 is inserted into the hole 22 (see FIGS. 1 and 4). A threaded hole 23 (see FIGS. 1 and 4) is formed on the rear surface of the subungual skin abutting tip member 4 by passing a threaded bolt 38 therethrough (see FIGS. 1 and 4) and passing a stopper ring 41 (see FIGS. 1 and 4) therethrough. Attach the threaded bolt 38 by engaging it.
The inside of the stopper ring 41 is ring-shaped and is sandwiched between the movable operation knob 21 and the thick rear surface of the file cover 3, and the stopper ring 41 is attached to a threaded bolt 38 and set screw 34 (see Fig. 1), etc. Fix it so that it does not move or spin idly.
During use, by turning the movable operating knob 21 left and right, the threaded bolt 38 that engages with the threaded hole 23 allows the integrated upper and lower subungual skin contact tip members 4 to be telescopically moved forward 7 and backward 11. Then, the forward width 17 (see FIG. 1) of the rounded tip outer circumferential end surface 36 facing the front side 7 is adjusted in and out.
FIG. 2 shows a state in which the tip-shaped edge, which is the outer peripheral end surface 36 of the lower subungual skin abutting tip member 4, is inserted and pressed against the subungual skin 33, and the toe 16 is brought into contact with the rotary file 5 and shaved. It shows.
The guide concave wall surface 18 shown in FIGS. 1 to 4 is a guide path for guiding the fingertip by forming a concave wall surface in the depth direction from the front 7 side to the rear 11 side of the lower subungual skin abutment tip member 4. Configure.
At the same time as the guide concave wall surface 18, a fingertip movement space 15 (see FIGS. 1 to 3) is provided, which serves as a guide path for guiding the fingertip during nail sharpening.
In addition, a fingertip moving space 15 is also provided on the upper surface of the upper subungual skin abutment tip member 4, which serves as a guide path for guiding the toe tip when sharpening the toenail.
The subungual skin abutment tip member 4 has an outer circumferential end surface 36 facing the front side 7 extended and retracted to the shortest extent, so that the forward width 17 (see FIG. 1) projects approximately 1 mm back and forth from the file surface 10 of the rotary file 5 to provide a gap. The file surface 10 is not exposed from the outer peripheral end surface 36 to prevent deep nail cutting.
When the upper and lower subungual skin abutting tip members 4 are operated to move forward, even if the dimension of the forward extension width 17 by the outer circumferential end surface 36, which has a rounded tip surface facing the front side 7, is extended and changes, the rotation will not occur. Since the file 5 is fixed and does not move, the protrusion width dimensions of the left and right side protrusion widths 31 (see Fig. 4) on both sides of the parallel width 12 (see Fig. 4) do not change, and are always kept at a constant protrusion gap of about 1 mm. This prevents the nail from being cut too deeply and allows the nail plate side edges 26 on both the left and right ends (see Fig. 4) to be cut short.
Insert the subungual skin 33 (see FIG. 2) of the nail along the tip-like edge of the outer peripheral end surface 36 of the upper and lower subungual skin applying tip members 4 formed in a semicircular U shape, and place it on the subungual skin. I'm trying to guess.
By making the bevel 9 of the outer circumferential end face 36 formed on the tip-like edge into a single-sided bevel shape, even if the subungual skin contacting tip member 4 is a slightly thick member, it can be shaped to easily fit the subungual skin 33. .
Note that the surface of the bevel 9 does not necessarily have to be a single bevel. For example, a thin flat plate-shaped member may be used to form a rounded surface, a wedge surface, etc., and a slightly polished tip-like edge. Needless to say, it should be made to fit the skin 33 easily.
In addition, the file cover 3 is provided with a hose connection port 19 (see Fig. 1), and a bellows hose 27 is connected to the file cover 3, and the bellows hose 27 is connected from the outside to a small handy cleaner, etc. (see FIG. 3) and suction holes 35 (see FIGS. 1 to 4) to remove the shavings.
When filing nails in the direction of the nail plate side edges 26 (see FIG. 4) on both the left and right sides, guide the fingertips 14 and toes 16 along the left and right guide concave wall surfaces 18 in the rear 11 direction to the central side of the rotary file shaft 6. By moving the toe, even if the toe tip 16 is lengthened, the protrusion width dimension of the side protrusion width 31 (see Fig. 4) on both sides remains constant, so the nail can be shaved short in the direction of the nail plate side edges 26 at both left and right ends. You can adjust the shape of. The above is the explanation based on the first embodiment.

The explanation will be based on the second embodiment shown in FIG. 5. The same parts as those shown in FIGS. 1 to 4 of the first embodiment will be omitted, and only the different parts will be explained.
In FIG. 5, separate upper and lower subungual skin contacting end members 4 are arranged in the file cover 3, and the upper subungual skin contacting end member 4 and the lower subungual skin contacting end member 4 are arranged. In between, a cylindrical rotary file 5 for the vertical axis is sandwiched and mounted, and is rotatable by a motor 1 on a file support shaft 6, thereby forming a nail insertion opening 8.
The shape of the upper and lower subungual skin abutment tip members 4 is substantially the same as the shape of the first embodiment, and is formed into a substantially semi-elliptical shape with a planar outer periphery having a semicircular U shape.
A passage hole 20 for the file support shaft 6 to pass through is formed in the lower subungual skin contact end member 4, and a hole 22 is provided by raising the rear part in an L shape, and a threaded bolt 38 is inserted in that part. The tip is inserted and pinned so that it does not come off, and the threaded bolt 38 is connected by idle rotation through the blind hole 22.
The movable operating knob 21 provided on the threaded bolt 38 is connected to the threaded bolt 38 through the threaded hole 23 of the file cover 3 through engagement therewith. The tips of the threaded bolts 38, which are connected in an L-shape at the rear, rotate idly from side to side through the blind holes 22, and are connected to the lower subungual skin abutment tip member 4, and are connected to the threaded holes 23 of the file cover 3. By left and right rotation of the movable operation knob 21 of the engaged threaded bolt 38, the lower subungual skin abutment tip member 4 is moved in the front and back direction to adjust the forward extension width 17 and adjust the length of the toe of the hand. Make it possible to adjust and cut freely.
The upper part of the subungual skin abutment tip member 4 in FIG. 5 can be manufactured and placed alone in the file cover 3, or can be molded integrally with the file cover 3, so either can be selected.
It is also possible to reverse the upper and lower parts of these upper and lower subungual skin abutment tip members 4.
The above is the explanation based on the second embodiment.

A description will be given based on Example 3 shown in FIG. 6.
1 to 5 will be omitted, and only the different parts will be explained.
This is a method in which the upper and lower subungual skin abutting tip members 4 are integrally formed and arranged with the file cover 3. In this case, by integrally forming with the file cover 3 by resin molding etc., the cost is low and manufacturing is easy. There are some characteristics. The U-shaped removable ring 42 shown in FIG. 6 is fitted into the rotary file 5 from the front side 7 and serves as a safety protection ring when sharpening nails.
The upper subungual skin contacting tip member 4 is integrally formed with the file cover 3 on the head side, and the lower subungual skin contacting end member 4 is integrally formed with a guiding concave wall surface 18 provided on the file cover 3. .
A method of moving the upper and lower subungual skin abutting end members 4, which are integrated with the file cover 3, in seven forward directions and separating them from the cylindrical vertical axis rotating file 5 will be described below.
Inside the file cover 3, a rotary file 5 for the vertical axis is fixed to the upper surface of the main body case 2 by a file fixing support member 28 with a fixing screw 32 so as not to move.
A movable operating knob 21 of a threaded bolt 38 is passed through the rear outer surface of the file cover 3 through a blind hole 22 and engaged with a threaded hole 23 provided in a file fixing support member 28 in the file cover 3.
By rotating the movable operating knob 21, the threaded bolt 38 engages with the threaded hole 23 provided in the file fixing support member 28, and at the same time, the file cover 3 is tightened to the movable operating knob 21 within the spatial range of the cover inner space 13. The file cover 3 and the subungual skin abutment tip member 4 can be moved forward in seven directions within a cover movable range 29.
When returning to the original position, the file cover 3 is moved in the rear direction 11 while being supported by the stopper ring 41 by rotating the movable operation knob 21 in the opposite direction. The shape of the upper and lower subungual skin contact tip members 4 is formed into a substantially U-shaped semi-ellipse as in the first embodiment, and is provided with a passage hole 20 through which the file support shaft 6 passes.
As described above, in order to separate the upper and lower subungual skin abutment tip members 4 from the rotary file 5, a separation opening 30 as shown in FIG. Therefore, the upper and lower subungual skin abutment tip members 4 are separated from the rotary file 5 together with the file cover 3.
In addition, the above-mentioned separation opening 30 is used as a suction opening for nail shavings during nail filing, and as an insertion opening for a removable subungual skin abutment tip member 4 that is attached later in FIG. 7, which will be described below. The above is the explanation based on the third embodiment.

A description will be given based on Example 4 shown in FIG. 7.
In this method, as shown in FIG. 7, a removable and removable lower subungual skin abutting end member 4 manufactured as a single unit is inserted and placed inside the file cover from the front 7 side.
The removable and removable lower subungual skin abutment tip member 4 shown in FIG. 7 is not a movable file cover 3 as shown in the third embodiment shown in FIG. 6, but is based on the above-mentioned

embodiments

1 and 2. This is a method in which the file cover 3 is used in a fixed manner, the lower subungual skin abutting tip member 4 is removed, and a removable and insertable lower subungual skin abutting tip member 4 shown in FIG. 7 is used instead. be.
To explain these based on FIG. 7, (a) and (b) are the subungual skin abutment tip member 4 for the lower part, and (b) is a side sectional view taken along the line BB in (a).
The subungual skin abutment tip member 4 for the lower part is formed into a substantially semi-elliptical shape of a semicircle U, and the outer circumferential end surface 36 is configured as a tip-shaped edge.
A passage hole 20 for a file support shaft 6 is provided in the center of the lower subungual skin contact tip member 4, and the file support shaft 6 is inserted from the front 7 side toward the rear 11 side.
The lower subungual skin abutting tip member 4 inserted from the front 7 side acts as a stopper with the file support shaft 6 when the outer circumferential end surface 36 facing the front 7 side is expanded and contracted in the shortest distance, and the through hole 20 acts as a stopper. The extension width 17 can be adjusted, and the length and shape of the nail can be adjusted by fixing it so that it does not move.
To explain these attachment methods using FIG. 6 as an example, the part from which the lower subungual skin abutting tip member 4 in FIG. This is a method of inserting it into the cover 3 and arranging it. The arrangement method is to insert it through a four-way opening 30 provided in the file cover 3 shown in FIG.
In addition, the subungual skin abutting tip member 4 for the lower part (a) and (b) may be inserted and used instead of the subungual skin abutting tip member for the upper side. This is the explanation of the fourth embodiment.
In the above-mentioned embodiment, the method of use is explained by providing the upper and lower subungual skin contacting tip members 4, but this is to make the use and handling convenient and easy. For example, the upper subungual skin contacting tip member 4 Nails on hands and feet can be easily shaved using only the member 4, and it is not necessarily necessary to combine it with the lower subungual skin abutment tip member 4.
For example, when using the upper subungual skin contact tip member 4 to shave the nails of the hand, if the main body case 2 is used upside down, it can serve as the lower subungual skin contact member 4, so that the upper subungual skin contact member 4 can be It is also possible to arrange only one side of the skin contact tip member 4 alone.
When sharpening the toenail with the upper subungual skin contact tip member 4 according to the above-mentioned Examples 1 to 3, the main body case 2 is tilted and directed toward the toe, and the upper subungual skin contact tip member 4 is used to shave the toenail. Scrape 4 while applying it to the subungual skin at the bottom of your toenail. For this purpose, the slopes of the beveled edges 9 provided at the top and bottom are alternately formed in the top and bottom so that they can fit the subungual skin of the hands and feet.

A description will be given based on Example 5 shown in FIG. 8.
In an electric nail sharpener in which a motor 1 in a flat main body case 2 is connected to a rotary file 5 for a cylindrical horizontal shaft in a file cover 3, the upper and lower parts are connected via the rotary file 5 for a cylindrical horizontal shaft. A protruding edge is provided on the front end surface 40 of the separately arranged subungual skin abutting tip member 4 on the nail insertion opening 8 side, and the outer surface of the subungual skin abutting tip member 4 is connected to the cylindrical horizontal axis. A fingertip movement space 15 is provided on the outer surface of the subungual skin contact tip member 4 by covering it along the cylindrical rounded outer peripheral surface of the rotary file 5 and serving as a guide path for the fingertip.
The tip of the finger can be smoothly guided within the fingertip movement space 15 when the pronged edge provided on the front end surface 40 is inserted into the subungual skin and brought into contact with the rotary file 5 for the horizontal axis for scraping. The outer surface of the subungual skin contact tip member 4 is rounded.
Although the shape of the tip-like edge provided on the front end surface 40 described above is such that it can be easily inserted into the subungual skin, the shape of the tip-like edge can be formed in a wide variety of ways, so any shape can be used. good.
In addition, in addition to forming the outer surface of the subungual skin abutment tip member 4 in a rounded shape along the cylindrical rounded outer circumferential surface of the cylindrical horizontal axis rotating file 5, Any shape, such as an L shape or a Z shape, will work.
The subungual skin abutment tip members 4 at the upper and lower portions of FIG. 8 are extended in the depth direction along with the nail insertion opening 8 along the horizontal axis direction of the cylindrical horizontal axis rotary file 5.
A movable operating knob 21 of a threaded bolt 38 passes through a knob moving hole 25 formed in the file cover 3 and is connected to the rear end of the lower subungual skin contact tip member 4 .
By loosening the movable operating knob 21 and moving it in the forward 7 direction along the knob movement hole 25, the lower subungual skin abutment tip member 4 is made to protrude toward the front 7 side, and the forward protrusion width 17 is To freely adjust the length of the toe of the hand and shave by adjusting the ingress and egress.
In the direction of the nail plate side edge 26, which is to be shaved short, the upper subungual skin abutting tip member 4 is turned inside out and shaved.
The file cover 3 and main body case 2 that incorporate the above-mentioned rotary file 5 for the horizontal axis can be used in any shape, such as a flat body or a cylindrical body (for example, see the above-mentioned Non-Patent Document 2). Therefore, it is possible to select any shape of the main body case.
These file covers 3 are provided with hose connection ports 19, and the shavings inside the case are removed by suction from the outside. The above is the explanation based on the fifth embodiment.

1 Motor 2 Main case 3 File cover 4 Undernail skin contact tip member 5 Rotating file 6 File support shaft 7 Front 8 Nail insertion opening 9 Bevel removal 11 Rear 15 Fingertip movement space 17 Front width 18 Guide concave wall surface 19 Hose connection port 21 Movable operation knob 26 Nail plate side edge 27 Bellows hose 31 Side protrusion width 33 Underung skin 36 Outer peripheral end surface 40 Front end surface

Claims

In an electric nail sharpener in which a motor in the main body case is connected to a rotary file for a cylindrical vertical axis in a file cover, an upper part and a lower part are separated in the file cover via the rotary file for a cylindrical vertical axis. a subungual skin abutting tip member is attached, and the outer circumferential end surface of the subungual skin abutting tip member is formed into a semicircular U-shaped approximately semi-elliptical shape, and between the upper and lower subungual skin abutting tip members. A nail insertion opening is configured along the substantially semi-elliptical shape, and the subungual skin applying tip member is moved forward by rotation of a movable operation knob connected to the subungual skin applying tip member. The facing outer circumferential end surface is moved in the forward direction and separated from the rotary file for the cylindrical vertical axis, the forward extension width of the subungual skin applying tip member is adjusted in and out, and a tip-like edge is provided on the outer circumferential end surface. The electric nail sharpener is characterized in that the tip-shaped edge is inserted into the subungual skin of the back of the nail, and the nail is brought into contact with a rotating file while being brought into contact with the subungual skin to shave the nail.
The electric nail sharpener according to claim 1, wherein a hose connection port is provided on the outer periphery of the file cover containing the rotary file, and a hose is connected thereto, and nail shavings are suctioned and removed from inside the file cover by suction from the outside. vessel.
In an electric nail sharpener that is connected to a motor in the main body case and a rotary file for a cylindrical horizontal axis in a file cover, the subungual skin abutting tip is separated into an upper part and a lower part via the rotary file for a cylindrical horizontal axis. A member is attached, and a nail insertion opening is formed between the upper and lower subungual skin applying tip members, and the outer surface of the subungual skin applying tip member is attached to the cylindrical shape of the rotary file for the cylindrical horizontal axis. The upper and lower subungual skin applying tip members are provided with tip-shaped edges on the front end surfaces thereof, and the tip-shaped edges are applied to the subungual skin at the back of the nail. This electric nail sharpener features an electric nail sharpener that sharpens the nail by inserting it up to the bottom of the nail and touching it against the subnail skin while bringing the nail into contact with a rotating file.
The front end surface facing the front side of the lower subungual skin abutment tip member is moved in the forward direction and separated from the rotary file for the cylindrical horizontal axis, and the forward width of the lower subungual skin abutment tip member is adjusted. The electric nail sharpener according to claim 3, characterized in that the electric nail sharpener is adjustable in and out.