Electric nail clippers

Abstract

The invention provides an electric nail clipper, and aims to solve the problems that the existing electric nail clipper takes a long time to repair longer nails and is poor in adaptability to nails with different curvatures. The nail clipper comprises a shell, a clipper head and a groove for a nail to pass through are arranged on the shell, the clipper head extends out of the shell, penetrates out of the shell from the side face of the groove, passes through the groove, penetrates into the shell from the other side face, opposite to the side face, of the groove and is blocked at a groove opening, and the groove is configured in a mode that when the nail passes through the groove, the clipper head is inserted into the groove opening. A nail can be cut off or ground by the tool bit. Therefore, the fingernails with any curvature can enter the grooves to be cut off or ground, the longer fingernails are cut off by the tool bit when passing through the grooves, and the shorter fingernails are ground when passing through the grooves.

Description

Technical Field

[0001] The invention relates to the field of nail clippers, and in particular to an electric nail clipper. Background Art

[0002] Electric nail clippers are a daily necessity for personal care, which assist users in trimming nails by means of electric drive. Existing electric nail clippers are mainly composed of a housing, a motor and a cutting shaft, wherein the surface of the cutting shaft is provided with spiral cutting patterns, the motor drives the cutting shaft to rotate, and a nail entrance is provided on the housing. After the nail extends into the interior of the housing through the nail entrance, the nail is ground by the rotating cutting shaft, thereby trimming the nail. Therefore, the existing electric nail clippers achieve the purpose of trimming nails by completely grinding the nails into small particles, and it takes a long time to trim longer nails, which directly affects the efficiency of trimming nails. Secondly, the nail entrance of the existing electric nail clippers can only allow nails within a certain curvature range to be inserted, and has poor adaptability to nails of different curvatures, which indirectly affects the efficiency of trimming nails.

[0003] Therefore, it is necessary to provide an electric nail clipper to solve the above-mentioned technical problems. Summary of the invention

[0004] The invention provides an electric nail clipper, aiming to solve the problem that the existing electric nail clippers take a long time to trim long nails and have poor adaptability to nails with different curvatures.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: An embodiment of the present invention provides an electric nail clipper, which includes a shell, a cutter head is provided on the shell, a motor is provided in the shell, the cutter head cooperates with the output shaft of the motor, and a switch for controlling the operation of the motor is also provided on the shell. The characteristics are: the shell is provided with a groove for the nail to pass through, the cutter head extends from the shell, passes out of the shell from the side of the groove, passes through the groove, and then passes into the shell from the other side opposite to the groove to be blocked at the groove mouth, and the groove is configured so that when the nail passes through the groove, the nail can be cut or ground by the cutter head.

[0006] In the present technical solution, since the groove is provided for the passage of nails, nails of any curvature can enter the groove. Once entering the groove, the nails will be cut off or ground and will no longer interfere with the entry of subsequent nails. The solution is more adaptable to nails of different curvatures. Since a cutter head is provided at the mouth of the groove for the passage of nails to block the mouth of the groove, a longer nail will be cut off by the cutter head when passing through the groove, and a shorter nail will be ground when passing through the groove. The solution is more efficient in repairing longer nails.

[0007] As a preferred embodiment of the above technical solution, the cutter head includes a working end and a shaft, the working end has an outer diameter of less than 2 mm and is provided with a blade, and the shaft includes a shaft portion with a polygonal cross section and a shaft portion with a circular cross section, which are respectively used to transmit torque and sleeve bearings. The beneficial effects of this preferred technical solution are: since the outer diameter of the working end used for cutting or grinding nails is small, the cutting conditions can be increased and the grinding conditions can be reduced, and the efficiency of nail repair is improved; since the shaft portion has a polygonal cross section, the torque transmission is more reliable and efficient; since the shaft portion with a circular cross section cooperates with the bearing, the friction is effectively reduced and sufficient radial support is provided for the cutting of nails.

[0008] As a preferred embodiment of the above technical solution, the groove is a through groove including two side surfaces and a bottom surface, and holes for the working end of the cutter head to pass through and in are respectively provided at the edge positions of the two side surfaces. The beneficial effects of this preferred technical solution are: since the groove is a through groove, sufficient space and conditions are provided for the nail to pass through; since holes for the working end of the cutter head to pass through and in are respectively provided at the edge positions of the two side surfaces, the working end of the cutter head is positioned at the edge of the groove, so that the working end of the cutter head is closer to the fingertips to achieve a more thorough effect of trimming nails.

[0009] As a preferred embodiment of the above technical solution, the housing is provided with a first spur gear, a second spur gear, a third spur gear, a first bevel gear, a second bevel gear, and a bearing for providing radial support for the cutter head, which are used to rotate around the rotation axis and have a polygonal axial hole with the same shape as the polygonal cross-sectional shaft part of the cutter head and can be inserted to drive the cutter head to rotate. The first bevel gear is sleeved on the output shaft of the motor, the second bevel gear and the third spur gear are sleeved on the same shaft and rotate synchronously, the first bevel gear is meshed with the second bevel gear, the third spur gear is meshed with the second spur gear, the second spur gear is meshed with the first spur gear, and the polygonal cross-sectional shaft part of the cutter head cooperates with the axial hole of the first spur gear to form a linkage cooperation between the cutter head and the motor. The beneficial effect of this preferred technical solution is that since the first spur gear has a polygonal axial hole with the same cross-sectional shape as the polygonal cross-sectional shaft part of the cutter head and can be inserted to drive the cutter head to rotate, which directly cooperates with the cutter head shaft, the transmission efficiency is improved, the structure is simplified, and the space required for the cutter head transmission components is saved.

[0010] As a preferred embodiment of the above technical solution, the shell gradually widens toward both ends along the axis of the cutter head at the corresponding position of the cutter head, and a space for the first straight gear to be placed is formed in the shell directly below the cutter head by gradually widening, and part of the side surface formed by the gradual widening is a concave arc surface that assists the positioning of the fingertips. The beneficial effect of this preferred technical solution is that: since the shell gradually widens toward both ends along the axis of the cutter head at the corresponding position of the cutter head, a larger space for the placement of the first straight gear is formed in the shell directly below the cutter head; since part of the side surface formed by the gradual widening is a concave arc surface that assists the positioning of the fingertips, it assists the positioning of the nail without blocking the line of sight.

[0011] As a preferred embodiment of the above technical solution, the housing includes an upper end cover, a middle housing, and a lower housing that are separately arranged; the first bevel gear, the second bevel gear, the third spur gear, the second spur gear, the first spur gear, and the motor are arranged in the lower housing; and the cutter head and the bearing are arranged in the middle housing. The beneficial effect of this preferred technical solution is that since the housing includes an upper end cover, a middle housing, and a lower housing that are separately arranged, it is convenient to produce, assemble, and disassemble parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the external structure of a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the groove structure after the upper end cover is removed according to a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of a specific embodiment of the present invention with the middle shell and the upper end cover removed; Figure 4 It is a schematic diagram of the internal gear transmission structure of a specific embodiment of the present invention; Figure 5 A schematic diagram of the structure of a cutter head according to a specific embodiment of the present invention; Figure 6 It is a schematic diagram of the matching structure of the cutter head, the bearing and the first spur gear in a specific embodiment of the present invention; Figure 7 It is a schematic diagram of the structure of the first straight gear in a specific embodiment of the present invention; Figure 8 Illustrate the ergonomics of the electric nail clipper of the present invention; Fig. 9 It is a schematic diagram of an explosion of a specific embodiment of the present invention.

[0013] Numbers in the figure: 10, housing, 100, groove, 101, groove side, 102, groove bottom, 103, positioning concave arc surface, 20. Switch, 30. Motor, 40. Cutter head, 401. Cutter head working end, 402. Cutter head polygonal cross-section shaft portion, 403. Cutter head circular cross-section shaft portion, 50, bearing, 501, bearing inner ring, 502, bearing outer ring, 60. The first straight gear, 601. The polygonal axial hole of the first straight gear, 4. First bevel gear, 5. Second bevel gear, 6. Third spur gear, 7. Second spur gear. DETAILED DESCRIPTION

[0014] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present invention.

[0015] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Fig. 9 As shown, the present embodiment is an electric nail clipper, comprising a shell 10, on which a cutter head 40 is provided, inside of which a motor 30 is provided, the cutter head cooperates with an output shaft of the motor, the shell is also provided with a switch 20 for controlling the operation of the motor, the shell 10 is provided with a groove 100 for the passage of a nail, the cutter head extends from the shell 10, passes through the shell from a side surface 101 of the groove, passes through the groove 100, and then passes through the shell from another side opposite thereto to be blocked at the mouth of the groove, the groove being configured such that when a nail passes through the groove 100, the nail can be cut or ground by the cutter head 40.

[0016] When in use, since the groove 100 allows the nail to pass completely, nails of any curvature can enter the groove 100. Once entering the groove 100, the nails will be cut off or ground and will no longer interfere with the entry of subsequent nails. The scheme is more adaptable to nails with different curvatures. Since a cutter head 40 is provided at the opening of the groove for the nail to pass through to block the opening of the groove, when a longer nail passes through the groove 100, it will be cut off by the cutter head 40, and when a shorter nail passes through the groove 100, it will be ground by the cutter head 40. The scheme is more efficient in repairing longer nails.

[0017] In a specific embodiment of the present invention, the cutter head 40 comprises a working end 401 and a shaft, wherein the working end 401 has an outer diameter less than 2 mm and is provided with a blade, and the shaft comprises a shaft portion 402 with a polygonal cross section and a shaft portion 403 with a circular cross section, which are respectively used to transmit torque and sleeve the bearing 50. When in use, since the working end 401 for cutting or grinding nails has a smaller outer diameter, the cutting conditions can be increased and the grinding conditions can be reduced, making the nail repairing more efficient; due to the polygonal cross section of the shaft portion 402, the torque transmission is more reliable and efficient; since the circular cross section of the shaft portion 403 cooperates with the inner ring 501 of the bearing 50, the friction is effectively reduced and sufficient radial support is provided for the cutting of nails.

[0018] In the specific embodiment of the present invention, the groove 100 is a through groove including two side surfaces 101 and a bottom surface 102, and holes are respectively provided at the edge positions of the two side surfaces for the working end 401 of the cutter head to pass through and in. When in use, since the groove 100 is a through groove, sufficient space and conditions are provided for the nail to pass through; since holes are respectively provided at the edge positions of the two side surfaces 101 for the working end of the cutter head to pass through and in, the working end 401 of the cutter head is positioned at the edge of the groove, so that the working end 401 of the cutter head is closer to the fingertips to achieve a more thorough effect of trimming the nails.

[0019] In a specific embodiment of the present invention, the housing 10 is provided with a first spur gear 60, a second spur gear 7, a third spur gear 6, a first bevel gear 4, a second bevel gear 5 and a bearing 50 for providing radial support for the cutter head 40, which is used to rotate around a rotation axis and has a polygonal axial hole 601 with the same shape as the polygonal cross-sectional shaft portion 402 of the cutter head and can be inserted and drive the cutter head 40 to rotate. The first bevel gear 4 is sleeved on the output shaft of the motor 30, the second bevel gear 5 and the third spur gear 6 are sleeved on the same axis and rotate synchronously, the first bevel gear 4 is meshed with the second bevel gear 5, the third spur gear 6 is meshed with the second spur gear 7, the second spur gear 7 is meshed with the first spur gear 60, and the polygonal cross-sectional shaft portion 402 of the cutter head cooperates with the axial hole 601 of the first spur gear to form a linkage cooperation between the cutter head 40 and the motor 30. When in use, since the first spur gear 60 has a polygonal axial hole 601 with the same cross-sectional shape as the polygonal cross-sectional shaft part 402 of the cutter head, which can be inserted into and drive the cutter head 40 to rotate and directly cooperates with the cutter head shaft, the transmission efficiency is improved, the structure is simplified, and the space required for the cutter head driving component is saved.

[0020] In a specific embodiment of the present invention, the housing 10 gradually widens toward both ends along the axis of the cutter head at the position corresponding to the cutter head, and a space for the first spur gear to be placed is formed in the housing just below the cutter head by gradually widening, and part of the side surface formed by the gradually widening is a concave arc surface 103 that assists the fingertips in positioning. When in use, since the housing gradually widens toward both ends along the axis of the cutter head at the position corresponding to the cutter head, a larger space for the first spur gear 60 to be placed is formed in the housing just below the cutter head; since part of the side surface formed by the gradually widening is a concave arc surface 103 that assists the fingertips in positioning, it assists in positioning the nail without blocking the line of sight.

[0021] In a specific embodiment of the present invention, the housing includes an upper end cover 11, a middle housing 12, and a lower housing 13 which are separately arranged. The first bevel gear 4, the second bevel gear 5, the third spur gear 6, the second spur gear 7, the first spur gear 60, and the motor 30 are arranged in the lower housing 13, and the cutter head 40 and the bearing 50 are arranged in the middle housing 12. When in use, since the housing 10 includes the upper end cover 11, the middle housing 12, and the lower housing 13 which are separately arranged, it is convenient to produce, assemble, and disassemble parts.

[0022] The present invention complies with ergonomics. Figure 8 As shown, when in use, hold the handle portion 14 of the present invention with one hand, and place the side of the nail at the cutter head with the other hand, with the fingertips attached to the concave arc surface 103, then turn on the switch 20 and the cutter head starts to rotate, and then keep the fingertips attached to the concave arc surface 103, send the nail into the groove, and the rotating cutter head will start to cut the nail that has entered until the nail is cut off from the other side. When the other hand needs to be trimmed, just rotate the present invention 180° along the axis 81 and hold it in the other hand and repeat the above process. During the whole process, the positioning and cutting of the concave arc surface will be very stable and accurate, the concave arc surface has a large curvature and the field of view will not be affected, the smaller notch only allows the nail to pass through, and the safety is also guaranteed, and the cutting of the handle portion 14 close to the cutter head will be more labor-saving and easy to control.

[0023] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electric nail clipper, comprising a housing, a cutter head disposed on the housing, a motor disposed in the housing, the cutter head and the motor output shaft being linked and coordinated, and a switch for controlling the motor operation being also disposed on the housing, characterized in that: The shell is provided with a groove for the nail to pass through, the cutter head extends from the shell, passes through the shell from the side of the groove, passes through the groove, and then passes into the shell from the other side opposite to the groove to block the groove mouth, and the groove is configured so that when the nail passes through the groove, the nail can be cut or ground by the cutter head.

2. The electric nail clipper according to claim 1, characterized in that: The cutter head comprises a working end and a shaft. The working end has an outer diameter less than 2 mm and is provided with a cutting edge. The shaft comprises a shaft part with a polygonal cross section and a shaft part with a circular cross section, which are respectively used for transmitting torque and sleeve bearings.

3. The electric nail clipper according to claim 2, characterized in that: The groove is a through groove including two side surfaces and a bottom surface, and holes for the working end of the cutter head to pass out and in are respectively arranged at the edge positions of the two side surfaces.

4. The electric nail clipper according to claim 3, characterized in that: The shell is provided with a first spur gear, a second spur gear, a third spur gear, a first bevel gear, a second bevel gear and a bearing for providing radial support for the cutter head, which are used to rotate around the rotation axis and have a polygonal axial hole with the same shape as the polygonal cross-sectional shaft part of the cutter head and can be inserted to drive the cutter head to rotate. The first bevel gear is sleeved on the output shaft of the motor, the second bevel gear and the third spur gear are sleeved on the same shaft and rotate synchronously, the first bevel gear is meshed with the second bevel gear, the third spur gear is meshed with the second spur gear, the second spur gear is meshed with the first spur gear, and the polygonal cross-sectional shaft part of the cutter head cooperates with the axial hole of the first spur gear to form a linkage cooperation between the cutter head and the motor.

5. The electric nail clipper according to claim 4, characterized in that: The shell gradually widens toward both ends along the axis of the cutter head at the corresponding cutter head position, and a space for accommodating the first straight gear is formed in the shell directly below the cutter head by the gradual widening. Part of the side surface formed by the gradual widening is a concave arc surface for assisting fingertip positioning.

6. The electric nail clipper according to claim 5, characterized in that: The shell includes an upper end cover, a middle shell, and a lower shell which are separately arranged. The first bevel gear, the second bevel gear, the third spur gear, the second spur gear, the first spur gear, and the motor are arranged in the lower shell, and the cutter head and the bearing are arranged in the middle shell.

Images