JPH0679413U - Nail sharpener - Google Patents

Abstract

(57) [Abstract] [Purpose] A conventional nail scraper that uses a motor to rotate the scraping part, if you do not accurately hold the position of your finger, may scratch meat or cause pain or feel unpleasant. There is
Further, there is a problem that the nail will stop when it is brought into strong contact with the scraping portion, so that it is possible to perform safe and accurate scraping easily regardless of who operates it. A battery 10, a motor 11 rotatably driven by the battery, a rotation reduction mechanism 12 for reducing the rotation of the motor, and a disk-shaped fixed to a rotation output shaft 13 of the rotation reduction mechanism are provided in cases 14 and 16. Each of the nail scraping portions 15 is accommodated, and an opening 17 for inserting a nail is formed in at least a part of the case facing the outer peripheral portion of the nail scraping portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric nail scraping device with improved operability.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, a so-called ordinary nail clipper, which mechanically cuts a nail by sandwiching the nail with a blade and using the force of a lever, has been widely used. According to this nail clipper, it is difficult to cut the nail in a good shape, and it is necessary to finish with a file, and it is dangerous because the nail may be cut deeply by mistake and the meat may be cut. In particular, elderly people, sick people, children, etc. need to be careful in handling. Also, since it makes a clicking sound, it is difficult to use in public. In order to solve such a problem, an electric nail scraping device has been proposed. FIG. 12 is a perspective view of a conventional electric nail scraping device. In the figure, 1 is a lower case containing a motor and a battery (not shown), 2 is a rotary plate made of a flat disk-shaped file which is directly connected to the output shaft of the motor, and 3 is an upper surface of the rotary plate 2. An upper case 4 for covering the rotary plate 2 so as to expose it in an angle range of about 45 °, 4 is a claw, and 5 is a finger. When a switch (not shown) is turned on, the motor rotates and the rotary plate 2 also rotates at high speed. When the tip of the claw 4 is brought into contact with the upper surface of the rotating rotary plate 2, the tip of the claw 2 in contact is scraped. This conventional device mainly polishes the nails rather than sharpening them.

[0003]

[Problems to be solved by the device]

 However, in such a conventional electric nail scraping device, unless the position of the finger is accurately held, the flesh under the nail comes into contact with the rotating plate 2, causing pain or discomfort. You may feel it. Further, since the rotary plate 2 is directly connected to the output shaft of the motor, if the pawl 4 is strongly contacted with the rotary plate 2, it will stop. For this reason, there is a problem that the optimum contact force is delicate, and it takes time to scrape when the contact is weak.

The present invention solves such a problem, and provides a nail scraping device which is safe and accurate for anyone who can perform sharp cutting in a short time.

[0005]

[Means for Solving the Problems]

 The nail scraping device according to the present invention includes a battery, a motor rotationally driven by the battery, a rotation reduction mechanism that reduces the rotation of the motor, and a cylindrical nail scraper fixed to the rotation output shaft of the rotation reduction mechanism in the case. Each part is accommodated, and an opening for inserting a claw is formed in at least a part of the case facing the outer peripheral part of the claw scraping part.

[0006] Furthermore, a finger contact plate that is rotatable with respect to the nail scraping portion is provided below the nail scraping portion. Further, the nail scraping portion is for rough cutting and finishing, and each has an opening for inserting a nail. In addition, the case has a powder reservoir in which the shavings are stored. The case has a brush that contacts the outer periphery of the nail scraping portion. Also, a cover is provided in the opening of the case. Further, a rotary fan for guiding the shavings to the powder reservoir is provided. Further, a means for transmitting the rotation is provided so that the rotation speed of the rotary fan becomes higher than the rotation speed of the claw scraping portion.

[0007]

[Action]

 When the tip of the nail is inserted into the opening of the case, the tip of the nail comes into contact with the peripheral surface of the scraping portion and the nail is scraped. Since the opening serves as a guide for the nail, the finger does not come into contact with the peripheral surface of the scraped portion. Further, since the rotation of the motor is decelerated to rotate the nail scraping portion, the rotation does not stop even if the nail scraping portion is pushed by the nail.

[0008]

EXAMPLES Hereinafter, the nail scraping device according to the present invention will be described in detail. FIG. 1 is a sectional front view of an embodiment of the nail scraping device of the present invention. In FIG. 1, 10 is a battery, 11 is a DC motor that rotates when current is supplied from the battery 10 by turning on a switch (not shown), and 12 is a gear train that reduces the rotation of the motor 11 at a predetermined ratio. The rotation reduction mechanism 13 is a rotation output shaft of the rotation reduction mechanism 12. The battery 10, motor 11, and rotation reduction mechanism 12 are housed in a case 14. Reference numeral 15 denotes a claw scraping portion fixed to the rotary output shaft 13, 16 denotes a lid case detachably provided on the case 14, which covers the upper portion of the claw scraping portion 15, 17 denotes a claw between the case 14 and the lid case 16. The opening is formed at a position facing the outer periphery of the scraped portion 15. All the components are housed in the case 14 and the lid case 16 only by seeing the outer periphery of the nail scraping portion 15 from the opening 17.

FIG. 2 is a sectional front view of another embodiment in which components are vertically arranged. In FIG. 2, reference numeral 20 is a battery, 21 is a motor arranged above the battery 20, 22 is a rotation reduction mechanism, 23 is a rotary output shaft, 24 is a case, 25 is a nail scraper, and 26 is a detachable screw. The lid case 27 has an opening, and the case 24 has the same configuration as that of the embodiment of FIG. 1 except that the case 24 is formed in a vertically long cylindrical shape. 28 is a bottom case. The batteries 10 and 20 described above may be rechargeable batteries, or may be configured to be charged while being housed in the cases 14 and 24. Further, the lid cases 16 and 26 can be removed to clean the inside, and the nail scraping portions 15 and 25 can be replaced.

FIG. 3 is an enlarged sectional view of a main part of the embodiment shown in FIG. In FIG. 3, 18 is a fixed shaft which is loosely inserted concentrically in the rotary output shaft 13, and 19 is a screw for fixing the lid case 16 to the fixed shaft 18. When the switch is turned on and the motor 11 is rotated, this rotation is decelerated and the torque is increased, and the claw scraping portion 15 rotates with a strong torque. When the claw 4 is inserted into the opening 17 that serves as a guide, the tip of the claw is scraped on the outer periphery of the scraping part 15. Since the nail scraping portion 15 has a sufficient torque, it is not stopped by being pushed by the nail. Moreover, since the finger 5 hits the case 14 and does not enter the inside, the finger 5 is not scraped by the nail scraping portion 15. When the finger 5 is swung up and down as shown by the arrow, the tip of the nail 4 is rounded and smoothly scraped. The number of rotations of the nail scraping part is set so that the peripheral speed of the outer circumference thereof is the optimum value for the nail scraping. As a result of the experiment, the outer diameter of the nail scraping portion was 6.75 mm, and the optimum value was 600 to 1000 rpm. That is, when converted to the peripheral speed, it becomes 21 to 5.3 cm / sec. If the number of revolutions of the nail scraping portion is less than 600 rpm, it is uncomfortable because a rugged feeling is transmitted to the nail, and if it exceeds 1000 rpm, frictional heat increases and it is uncomfortable.

FIG. 4 is a view for explaining the surface shape of the nail scraping portion 15. The nail scraping portion 15 is made of a hard metal (for example, Vickers 600th place), and is formed into a cylindrical cylinder having an inner diameter of 2.5 mm and an outer diameter of 6.75 mm as an example, and a blade is formed on the outer periphery thereof. ing. The shape of the blade is, for example, 36 triangular wave shapes as shown in FIG. 4A, where a = 0.4 mm, b = 0.1 mm, and c = 0.2 mm. The above values are one example, and any value can be set near this value. This blade rotates in the direction of the arrow in FIG. Further, as shown in FIG. 4 (B), the blade may be uneven in the axial direction of the claw scraping portion (upward / downward direction in FIG. 4 (B)) instead of being a straight line. That is, the high tip of the blade rises or falls in the axial direction like a sine wave. The line shown by the broken line in the figure connecting the peaks and valleys forms a predetermined angle with respect to the side surfaces (upper and lower surfaces in FIG. 4B) of the nail scraping portion. This facilitates smooth scraping of the nail.

FIG. 5 is a view for explaining the surface shape of another embodiment of the nail scraping portion 15. In the claw scraping portion of FIG. 5 (A), a loose circumferential groove 15a is formed in the center of the outer circumference of the claw scraping portion so that when the claw hits the outer peripheral surface, it does not escape to the end. . Also, with this shape, the tips of the nails are rounded so that burrs do not appear on the nails, which is more effective when used for finishing. In the nail scraping portion of FIG. 5B, three thin nail scraping portions 15a, 15b, and 15c having the same shape are stacked by shifting the pitch of the blade by half a pitch. This nail scraping portion has an effect similar to that of the embodiment shown in FIG. Although three sheets are stacked in this example, it is needless to say that two sheets may be stacked and three or more sheets may be stacked.

FIG. 6 is a sectional view of an embodiment capable of rough cutting and finish cutting. In FIG. 6 (A), 33 is a rotary output shaft, 34 is a case, 35-1 is a nail sharpening part for fine finishing of the blade, 35-2 is a nail sharpening part for rough cutting of the blade, and 36. Is a lid case, 37-1 is an opening for finishing, 37-2 is an opening for rough cutting, and 39 is a screw for attaching and detaching the lid case 36. The nail scraping parts 35-1 and 35-2 rotate as one body at the same rotation speed. First, the nail is inserted into the opening 37-2 to roughly cut the nail, and after the nail has been scraped to some extent, the nail is then inserted into the opening 37-1 to finish the nail scraping. In FIG. 6 (B), 35-3 is a nail cutting portion for rough cutting which has a smaller diameter than the nail cutting portion 35-1 and rotates integrally therewith, and 37-3 is an opening portion for this rough cutting. The claw scraping parts 35-1 and 35-3 have the same rotation speed, but the claw scraping part 35-3 has a lower rotation speed of the outer periphery where the blade is formed, so that the claws can be easily scraped during rough cutting. Is getting worse.

FIG. 7 is a sectional view of an embodiment in which shavings are prevented from scattering. In FIG. 7A, 43 is a rotary output shaft, 44 is a case, 45 is a claw scraping portion, 46 is a lid case, 47 is an opening, and 49 is a screw. Further, 44a is a powder reservoir formed in the case 44, and 44b is a brush provided in the case 44 so as to be arranged above the powder reservoir. The tip of the brush 44b comes into contact with the outer peripheral surface of the nail scraping portion 45. When shaving the nail, the shavings are cleaned by the brush 44b, and the shavings are collected in the powder reservoir 44a. The powder reservoir 44a is formed so as to be freely taken out from the case 44, and the powder accumulated in the powder reservoir 44a can be discarded after being taken out. A sponge or the like may be used instead of the brush. Since the outer peripheral portion of the nail scraping portion 45 is always washed by the brush 44b, there is no problem that powder is accumulated in the groove of the blade and cutting is dropped.

Further, in FIG. 7A, reference numeral 50 is a cover portion made of a volume elastic body such as sponge or rubber, which can be replaced by removing the lid case 46. The cover portion 50 is formed with a claw insertion portion 50a having a size that allows a claw to be loosely inserted, and is mounted so as to fill the opening 47. Therefore, although the claws can be easily inserted by the cover part 50, the powder generated by being scraped inside by the claw scraping part 45 does not come out from the opening 47, that is, the case 44. FIG. 7B is a front view of the opening 47. It goes without saying that this cover portion can be applied to each embodiment other than the embodiment of FIG.

FIG. 8 is a sectional view of an embodiment of the modified example of FIG. In FIG. 8, 53 is a rotary output shaft, 54 is a case, 54a is a powder reservoir, 55 is a claw scraper, 56 is a lid case, 57 is an opening, and 59 is a screw. Further, 54b is a rotary fan for guiding the shavings to the powder reservoir 54a, 53a is a nut for fixing the rotary fan 54b to the rotary output shaft 53, and 55a is a rotary output at a position below the claw scraper 55. It is a ring-shaped finger contact plate rotatably provided on the shaft 53. The tip of the finger 5 is placed on the finger contact plate 55a and moved leftward and rightward so that the tip of the fingernail 4 is applied to the outer periphery of the fingernail scraping portion 55 to be ground. The nail scraping operation becomes easier. The claw shavings are attracted to the rotary fan 54b, guided to the powder reservoir 54a, and are accumulated there.

FIG. 9 is a sectional view of an embodiment of the modified example of FIG. In FIG. 9, 63 is a rotary output shaft, 64 is a case, 64a is a powder reservoir, 65 is a nail scraper, 65a is a finger contact plate, 66 is a lid case, 67 is an opening, and 69 is a screw. Further, 64b is a rotary fan integrally attached to the upper side of the nail scraping portion 65, and 66a is a hole for sucking air from above by the rotation of the rotary fan 64b. When the nail is scraped as in the case of FIG. 8, the air is sucked from the hole 66a and flows downward by the rotation of the rotary fan 64b, so that the scraped powder of the nail is guided to the powder reservoir 64a and accumulated therein.

FIG. 10 is a sectional view of an embodiment of the modified example of FIG. In FIG. 10, 73 is a rotary output shaft, 74 is a case, 74a is a powder reservoir, 74b is a rotary fan, 75 is a nail scraper, 75a is a finger pad, 76 is a lid case, 76a is a hole, and 77 is an opening. , 79 are screws. Further, 73a is a fan rotating shaft which is rotatably inserted coaxially in the center of the rotating output shaft 73 and has a rotating fan 74b fixed at its upper end with a screw 79. The rotation of the motor 11 is decelerated through the gears 12a and 12b and is transmitted to the rotating shaft 12c. The rotation of the rotary shaft 12c is transmitted to the rotary output shaft 73 via the gear 12d and the gear 12e, rotates the rotary output shaft 73 at a decelerated predetermined rotational speed, and the nail scraping portion 75 rotates integrally with the rotary output shaft 73. On the other hand, the rotation of the rotary shaft 12c is transmitted to the fan rotary shaft 73a via the gears 12f and 12g, and the fan rotary shaft 73a is rotated at a predetermined rotational speed, so that the rotary fan 74b rotates integrally with the fan rotary shaft 73a. Since the deceleration transmission is from the gear 12d to the gear 12e and the acceleration transmission is from the gear 12f to the gear 12g, the rotation speed of the rotary fan 74b is larger than the rotation speed of the claw scraping portion 75, and the shavings The amount of air for collecting the powder in the powder reservoir 74a increases.

FIG. 11 is a sectional view of an embodiment of the modified example of FIG. In FIG. 11, reference numeral 83 is a rotation output shaft, 83a is a fan rotation shaft, 84 is a case, 84a is a powder collecting portion, 85 is a nail scraping portion, 84b is a rotary fan disposed on the side of the nail scraping portion 85, and 85a. Is a finger pad, 86 is a lid case, 87 is an opening, and 89 is a screw. The fan rotation shaft 83a is arranged beside the rotation output shaft 83 and is rotatably supported by the case 84. The rotation of the motor 11 is transmitted to the fan rotation shaft 83a via the gears 12h and 12i. As a result, the rotary fan 84b fixed to the fan rotary shaft 83a rotates at a predetermined rotation speed. On the other hand, the rotation of the fan rotation shaft 83a is transmitted to the rotation output shaft 83 after being decelerated via the gear 12j and the gear 12k, and the claw scraping portion 85 1 fixed to the rotation output shaft 83 rotates integrally therewith. Since deceleration is transmitted from the gear 12j to the gear 12k, the rotation speed of the rotary fan 84b becomes larger than the rotation speed of the claw scraping portion 85, and the air volume for collecting the cutting powder in the powder collecting portion 84a increases.

In the above-described embodiments, the battery, the DC motor, and the rotation reduction mechanism are used as the drive source that rotationally drives the nail scraping portion, but Zeni is used as the drive source that rotates the nail scraping portion. However, it is also possible to set the torque of the mainspring to an appropriate rotation speed via the rotation speed increasing mechanism and rotate the claw scraping portion by the output shaft of the rotation speed increasing mechanism.

[0021]

[Effect of device]

 According to the present invention, by simply inserting the tip of the nail into the opening of the case, the nail can be scraped on the outer periphery of the rotating scraping portion, so that the position of the finger is not accurately maintained unlike the conventional case. However, the part of the meat under the nails will not be scraped, and it will not be painful or unpleasant. Also, since the rotation of the motor is decelerated and transmitted to the claw scraping part, it does not stop even if the claw comes into strong contact with the claw scraping part, and it is necessary to pay attention to the contact force as in the past. It also eliminates the need for time to scrape. Further, by providing a rotatable finger contact plate under the nail scraping portion, the operation of the finger becomes easy. In addition, by providing both rough cutting and finishing claw cutting parts, it is possible to cut quickly and finish finely. Further, a brush or a rotary fan can be provided to store the shavings of the nail in the powder reservoir. Thus, the present invention has many excellent effects.

[Brief description of drawings]

FIG. 1 is a sectional front view of an embodiment of the present invention.

FIG. 2 is a sectional front view of another embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a main part of the embodiment of FIG.

FIG. 4 is a diagram for explaining a surface shape of a shaving rotor.

FIG. 5 is a diagram for explaining the surface shape of another embodiment of the shaving rotor.

FIG. 6 is a sectional view of an embodiment capable of rough cutting and finish cutting.

FIG. 7 is a sectional view of an example in which shavings are prevented from scattering.

8 is a cross-sectional view of an embodiment of the modified example of FIG.

9 is a cross-sectional view of an embodiment of the modified example of FIG.

FIG. 10 is a cross-sectional view of an embodiment of the modified example of FIG.

11 is a cross-sectional view of an embodiment of the modified example of FIG.

FIG. 12 is a perspective view of a conventionally proposed electric nail scraping device.

[Explanation of symbols]

 10 Battery 11 DC Motor 12 Rotation Reduction Mechanism 13 Rotation Output Shaft 14 Case 15 Claw Sharpener 16 Lid Case 17 Opening 44a Powder Reservoir 44b Brush 50 Cover 50a Claw Insert 54b Rotating Fan 55a Finger Touch Plate

Claims (9)

[Scope of utility model registration request] 1. A battery, a motor rotatably driven by the battery, a rotation reduction mechanism for reducing the rotation of the motor, and a cylindrical nail scraping portion fixed to a rotation output shaft of the rotation reduction mechanism in the case. A nail scraping device, characterized in that an opening for accommodating a nail is formed in at least a part of a case that is housed and faces an outer peripheral portion of the nail scraping portion. 2. The nail scraping device according to claim 1, wherein a finger contact plate that is rotatable with respect to the nail scraping portion is provided below the nail scraping portion. 3. The nail scraping device according to claim 1, wherein the nail scraping portion includes one for rough cutting and one for finishing, each of which has an opening for inserting a nail. 4. The claw scraping device according to claim 1, wherein the case has a powder reservoir in which the scraping powder is stored. 5. The nail scraping device according to claim 1, wherein the case has a brush that contacts the outer periphery of the nail scraping portion. 6. The opening of the case according to claim 1,
A nail scraping device, which is provided with a cover portion into which nails are inserted but shavings do not pass. 7. The claw scraping device according to claim 4, further comprising a rotating fan for guiding the scraping powder to the powder reservoir. 8. The claw scraping device according to claim 7, further comprising means for transmitting the rotation so that the rotation speed of the rotary fan is higher than that of the claw scraping portion. 9. A case, which houses a mainspring, a rotary speed increasing mechanism for speeding up the rotation of the mainspring, and a cylindrical claw scraping portion fixed to a rotary output shaft of the rotary speed increasing mechanism, respectively. A nail scraping device characterized in that an opening for inserting a nail is formed in at least a part of a case facing an outer peripheral portion of the portion.