Nail clippers

Abstract

This utility model discloses a nail clipper, comprising a hinged first clamping body (A) and a second clamping body (B). The clamping heads (A3, B3) have a 3-5 prismatic bent structure, a length of 12-25 mm, a narrow concave top surface, and a horizontally straight surface. The angle β between the side surface and the top surface is 80°-100° (preferably 90°). The inner beveled surface forms a 25°-55° cutting section with the top surface, including a working cutting edge and a driven cutting edge that fit tightly together for cutting. The angle α between the tip of the top surface and the axis of the clamping body is 120°-170°. The bent clamping head design of this utility model makes the nail clipper easy to use. The sharp clamping head facilitates insertion into the nail groove and provides good visibility. The curved top surface design conforms to the curvature of the nail, making nail trimming more efficient and easier.

Description

Technical Field

[0001] This utility model relates to the field of personal care tools, specifically to a nail clipper with optimized structure. Background Technology

[0002] Existing nail trimming tools (such as nail clippers and nail pliers) have significant shortcomings in complex trimming scenarios, especially for patients with paronychia or those who require fine trimming. The problems with the plier head structure of traditional tools are particularly prominent:

[0003] The contradiction between penile groove penetration and blind spot: The thick tip of the pliers and the unreasonable bending angle make it difficult to penetrate the nail groove and obstruct vision, which can easily injure the skin and aggravate infection.

[0004] Cutting efficiency and nail damage issues: The straight cutting surface of the beveled or narrow pliers tip does not match the curvature of the nail, resulting in uneven force and nail splitting;

[0005] Imbalance between structural strength and user experience: thinning the tip makes it prone to wobbling, while thickening it exacerbates obstruction and makes penetration more difficult, making it hard to balance "sharpness-stability-operability".

[0006] Existing technologies have not solved the problem of adapting the pliers head shape and cutting angle to the curvature of the nail, and lack a structural design that takes into account multiple performance aspects. This utility model achieves the following through innovative pliers head shape, linkage structure, and contour:

[0007] Easy to operate: Optimized bending angle and grip fulcrum, conforming to ergonomics;

[0008] Deep cutting with no blind spots: The narrowed pliers head design ensures stable cutting while providing clear observation of the nail groove;

[0009] Precise fit: The concave top surface and the 25°-55° inner bevel provide stronger shearing force to perfectly match the curvature of the nail.

[0010] The optimized design significantly improves trimming efficiency and comfort, making it suitable for cases involving paronychia and fine trimming. Utility Model Content

[0011] The nail clippers of this utility model include:

[0012] A nail clipper includes: a first clipper body and a second clipper body, which are hinged together at the middle of the clipper body by a hinge joint; the first clipper body and the second clipper body respectively include a handle at the rear end and a head at the front end; the head is bent and raised to one side and has a multi-faceted (3-5 facets) bent structure with a length of 12-25 mm, including:

[0013] The top surface is concave along its length and gradually narrows to a sharp point from the bend to the outer end. The concave design better conforms to the curvature of the nail. In the horizontal direction, the top surface is flat, providing better visibility during cutting.

[0014] The included angle β formed by the side surface and the top surface satisfies 80°≤β≤100°; the side surface is straight or slightly convex arc-shaped, and gradually narrows from the bend to the outer end to form a sharp shape;

[0015] The inner bevel intersects with the top surface to form a cutting section at 25° to 55°; the inner bevel gradually narrows from wide to narrow at the tip, and the concave arc-shaped top surface of the pliers head matches the inner bevel, which can conform to the curvature of the nail and reduce resistance and the risk of splitting during trimming;

[0016] The shearing part includes: an active cutting edge, disposed on the edge of the inner inclined surface, the active cutting edge and the inner inclined surface being on the same plane; or the active cutting edge and the inner inclined surface forming an angle θ, where θ is 5° to 30°, and the root of the active cutting edge is connected to the inner inclined surface; and a driven cutting edge, disposed on the edge of the top surface, coplanar with the top surface; when the jaws are closed, the active cutting edge and the driven cutting edge are completely in contact, forming a shearing engagement;

[0017] The line connecting the tip of the top surface and the inflection point of the bend forms an angle (α) of 120°≤α≤170° with the axis of the side of the clamp body.

[0018] The intersection of the side surface and the inner bevel is polished to form a transitional narrow surface. The cross-section of the transitional narrow surface is convex arc-shaped and has a width of 0.5 to 2 mm to avoid scratches and enhance structural strength.

[0019] Furthermore, the pliers head narrows inward on the side opposite to the top surface, with the thickness reduction being 1 / 6 to 1 / 2 of the combined thickness of the front end of the pliers body. This thickness reduction makes the tip of the pliers head sharper and reduces shearing resistance.

[0020] Furthermore, the width of the pliers head gradually narrows from the width c1 at the bend to the width c2 at the tip, forming a sharp shape, wherein 3mm≤c1≤7mm and 0.2mm≤c2≤1.5mm.

[0021] Furthermore, the thickness of the pliers head gradually narrows from the thickness e1 at the narrowed recess to the thickness e2 at the tip, forming a sharp shape, wherein 3mm≤e1≤6mm and 0.2mm≤e2≤1mm. The pliers head narrowing structure with this gradually changing thickness works together to further optimize the shearing performance.

[0022] Preferably, the included angle β formed by the intersection of the side surface and the top surface is 90°.

[0023] Furthermore, when the pliers head is closed, a square, elliptical, or oval or irregularly shaped hole conforming to the principles of fluid dynamics is formed at the middle position near one end of the pliers body to discharge the cutting chips. This design facilitates the removal of cutting chips and also facilitates the cutting at the root of the pliers head.

[0024] Furthermore, it also includes an elastic reset element disposed on the inner side of the clamp body or between the clamp handles, wherein the elastic reset element is a torsion spring, a spring or a spring sheet (spring sheet), used to realize the automatic reset of the clamp body.

[0025] Preferably, the elastic reset element is a torsion spring, with both ends of the torsion spring abutting against the clamp body, and the central shaft of the torsion spring being sleeved on the hinge.

[0026] Furthermore, the clamp body has a split structure, including a two-sided split type or a single-sided covering type, and it cooperates with the clamp head.

[0027] Furthermore, the split-type clamp body is provided with a reinforcing structure that mates with the clamp head.

[0028] Furthermore, the reinforcing structure includes guide ribs or snap-fit ​​structures.

[0029] This invention optimizes the design of the pliers head structure, the connection relationship of each component, and the overall shape, making it more convenient to use, eliminating blind spots during trimming, and better conforming to the curvature of the nail, thus improving comfort and convenience and making nail trimming more efficient and easier. Attached Figure Description

[0030] Figure 1-9 This is a view of the two-sided split clamp body structure; Figure 10-15 View of the enclosed clamp body structure; Figure 16-18 This is a structural diagram showing the side of the pliers head opposite the top surface when it is not narrowed.

[0031] Figure 1: Closed front view

[0032] Figure 2: Reverse view of the open mouth

[0033] Figure 3: Closed left view

[0034] Figure 4: Closed right view

[0035] Figure 5: Closed top view

[0036] Figure 6: Partial oblique view of the open mouth

[0037] Figure 7: Closed front view

[0038] Figure 8: Cross-sectional view of the pliers head when closed

[0039] Figure 9: Disassembly diagram (showing the installation location of the torsion spring)

[0040] Figure 10: Closed front view (wrap-around clamp body)

[0041] Figure 11: Closed reverse view (wrap-around clamp body)

[0042] Figure 12: Closed left view (wrap-around clamp body)

[0043] Figure 13: Closed right view (wrap-around clamp body)

[0044] Figure 14: Closed front oblique view (wrap-around clamp body)

[0045] Figure 15: Closed top view (wrap-around clamp body)

[0046] Figure 16: Closed left view (not narrowed)

[0047] Figure 17: Closed right view (not narrowed)

[0048] Figure 18: Closed front view of the pliers head with the head closed and cross-sectional view of the pliers head (not zoomed in). Detailed Implementation

[0049] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0050] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0051] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings.

[0052] Example 1 - Two-sided split clamp body

[0053] As shown in Figures 1-9, the nail clippers of this embodiment include:

[0054] The first clamp body A and the second clamp body B are hinged together at the middle clamp body A1 and B1 by a hinge joint C.

[0055] The first clamp body A and the second clamp body B respectively include clamp handles A2 and B2 located at the rear end and clamp heads A3 and B3 located at the front end;

[0056] The pliers heads A3 and B3 are bent to one side and have a 5-sided bent structure, with a length of 18mm, including:

[0057] The top surfaces A3-1 and B3-1 are concave arc-shaped along the length direction, and gradually narrow to a sharp point from the bend to the outer end; along the transverse direction, the top surfaces A3-1 and B3-1 are flat, which better conforms to the curvature of the nail;

[0058] The included angle β formed by the intersection of the sides A3-2 and B3-2 with the top surfaces A3-1 and B3-1 is 90°; the sides A3-2 and B3-2 are straight and gradually narrow from the bend to the outer end to form a sharp shape;

[0059] The inner bevels A3-3 and B3-3 intersect with the top surfaces A3-1 and B3-1 to form 35° cutting portions A4 and B4; the inner bevels A3-3 and B3-3 gradually narrow from wide to pointed, and the concave arc-shaped top surface of the pliers head fits the inner bevels to conform to the curvature of the nail, reducing resistance and the risk of splitting during trimming;

[0060] The shearing portions A4 and B4 include:

[0061] Active cutting surfaces A4-1 and B4-1 are located at the edges of inner inclined surfaces A3-3 and B3-3. The angle θ between active cutting surfaces A4-1 and B4-1 and inner inclined surfaces A3-3 and B3-3 is 15°, and the root of the active cutting surfaces is connected to the inner inclined surfaces.

[0062] Driven cutting surfaces A4-2 and B4-2 are located at the edges of top surfaces A3-1 and B3-1 and are coplanar with top surfaces A3-1 and B3-1. When the pliers heads A3 and B3 are closed, the active cutting surfaces A4-1 and B4-1 are completely in contact with the driven cutting surfaces A4-2 and B4-2 to form a shearing fit.

[0063] The line connecting the tip of the top surface A3-1 and B3-1 to the inflection point of the bend forms a 160° angle α with the axis of the side of the clamp body A1 and B1, making it more convenient to use;

[0064] The intersections of the sides A3-2 and B3-2 with the inner bevels A3-3 and B3-3 are ground to form transitional narrow surfaces A3-4 and B3-4, with a convex arc shape (2mm wide). This convex arc design echoes the concave arc shape of the top surfaces A3-1 and B3-1, not only avoiding skin scratches through a smooth transition, but also dispersing stress during shearing through the curved surface structure, enhancing the structural strength of the pliers tip, and improving overall stability while maintaining sharp cutting performance.

[0065] like Figure 8As shown, the pliers heads A3 and B3 include: top surface A3-1, B3-1, side surface A3-2, B3-2, and inner bevel surface A3-3, B3-3 as three main surfaces, plus two narrow surfaces: transition narrow surfaces A3-4, B3-4, and active cutting surfaces A4-1, B4-1, that is, 5 edges.

[0066] like Figure 3-4 As shown, the pliers heads A3 and B3 narrow inward on the side opposite to the top surfaces A3-1 and B3-1, with the thickness reduction being 1 / 3 of the combined thickness of the front end of the pliers body. For example, if the combined thickness of the front end of the pliers body is 6mm, then the thickness reduction is 2mm, making the tip thinner to enhance sharpness and reduce shearing resistance.

[0067] like Figure 7 As shown, the width of the pliers A3 and B3 gradually narrows from the width c1 at the bend to the width c2 at the tip, forming a sharp shape, where c1=5mm and c2=0.2mm.

[0068] like Figure 4 As shown, the thickness of the clamp heads A3 and B3 gradually narrows from the thickness e1 at the narrowed recess to the thickness e2 at the tip, forming a sharp shape, where e1=3mm and e2=0.2mm. This gradual change in thickness, together with the narrowing structure described in claim 2, further optimizes the shearing performance.

[0069] like Figure 1 As shown, when the pliers heads A3 and B3 are closed, an oval hole K is formed in the middle of one end of the pliers body A1 and B1. This design facilitates the removal of cutting debris and the cutting at the root of the pliers head, while also allowing the user to observe the cutting position.

[0070] like Figure 6 , Figure 9 As shown, the elastic reset element Q between the inner sides of the clamp bodies A1 and B1 or between the clamp handles A2 and B2 is a torsion spring. The two ends of the torsion spring abut against the clamp bodies A1 and B1 respectively, and the central shaft of the torsion spring is sleeved on the hinge C.

[0071] As shown in Figures 1-9, the clamp bodies A1 and B1 are a two-sided structure and cooperate with the clamp heads A3 and B3. The clamp bodies are provided with guide ribs A1-1 and B1-1 that cooperate with the clamp heads, which enhances the stability of the clamp head structure.

[0072] Example 2 - Single-sided enveloping clamp body

[0073] As shown in Figures 10-15, the nail clippers of this embodiment include:

[0074] A first clamp body A and a second clamp body B are hinged together at the middle clamp body A1 and B1 via a hinge joint C. The first clamp body A and the second clamp body B each include clamp handles A2 and B2 at the rear end and clamp heads A3 and B3 at the front end. The clamp heads A3 and B3 are bent to one side and have a triangular bending structure, with a length of 15mm, and include:

[0075] The top surfaces A3-1 and B3-1 are concave arc-shaped along the length direction, and gradually narrow from the bend to the outer end to form a sharp point; along the horizontal direction, the top surfaces A3-1 and B3-1 are flat, making it easy for the user to observe the trimming position; the concave arc shape along the length direction conforms to the curvature of the nail.

[0076] The included angle β formed by the intersection of the sides A3-2 and B3-2 with the top surfaces A3-1 and B3-1 is 90°; the sides A3-2 and B3-2 are slightly convex arc-shaped and gradually narrow from the bend to the outer end to form a sharp shape;

[0077] The inner bevels A3-3 and B3-3 intersect with the top surfaces A3-1 and B3-1 to form cutting portions A4 and B4 at a 45° angle; the inner bevels A3-3 and B3-3 gradually narrow from wide to pointed, and the concave arc-shaped top surface of the pliers head fits the inner bevels to conform to the curvature of the nail, reducing resistance and the risk of splitting during trimming;

[0078] The shearing portions A4 and B4 include:

[0079] Active cutting surfaces A4-1 and B4-1 are located at the edges of inner inclined surfaces A3-3 and B3-3. Active cutting surfaces A4-1 and B4-1 are on the same plane as inner inclined surfaces A3-3 and B3-3, and the root of the active cutting surface is connected to the inner inclined surface.

[0080] Driven cutting surfaces A4-2 and B4-2 are located at the edges of top surfaces A3-1 and B3-1 and are coplanar with top surfaces A3-1 and B3-1. When the pliers heads A3 and B3 are closed, the active cutting surfaces A4-1 and B4-1 are completely in contact with the driven cutting surfaces A4-2 and B4-2 to form a shearing fit.

[0081] The line connecting the tip of the top surface A3-1 and B3-1 to the inflection point of the bend forms an angle α of 150° with the axis of the side of the clamp body A1 and B1;

[0082] The intersections of the sides A3-2 and B3-2 with the inner bevels A3-3 and B3-3 are ground to form transitional narrow surfaces A3-4 and B3-4, the cross-section of which is convex arc-shaped (0.5mm wide). This convex arc design echoes the concave arc shape of the top surfaces A3-1 and B3-1. The convex arc grinding process creates a smooth transition, avoiding the sharp edges from scratching the skin. At the same time, the convex arc shape can disperse the stress during shearing and improve the fatigue strength of the pliers head.

[0083] The clamp heads A3 and B3 consist of three surfaces: top surface A3-1 and B3-1, side surface A3-2 and B3-2, and inner inclined surface A3-3 and B3-3, which are three edges.

[0084] like Figure 12-13 As shown, the pliers heads A3 and B3 narrow inward on the side opposite to the top surfaces A3-1 and B3-1, with the thickness reduction being 1 / 2 of the combined thickness of the front end of the pliers body. If the combined thickness of the front end of the pliers body is 12mm, then the thickness reduction is 6mm, making the tip thinner to enhance sharpness and reduce shearing resistance.

[0085] like Figure 14 As shown, the width of the pliers A3 and B3 gradually narrows from the width c1 at the bend to the width c2 at the tip, forming a sharp shape, where c1 = 4 mm and c2 = 1 mm.

[0086] like Figure 14 As shown, the thickness of the clamp heads A3 and B3 gradually narrows from the thickness e1 at the narrowed recess to the thickness e2 at the tip, forming a sharp shape, where e1=4mm and e2=1mm. This gradual change in thickness, together with the narrowing structure described in claim 2, further optimizes the shearing performance.

[0087] like Figure 10 As shown, when the pliers heads A3 and B3 are closed, a square hole K is formed in the middle of one end of the pliers body A1 and B1. This design facilitates the removal of cutting debris and the cutting at the base of the pliers head, while also allowing the user to observe the cutting position.

[0088] like Figures 11-12 As shown, the elastic reset element Q between the inner sides of the clamp bodies A1 and B1 or between the clamp handles A2 and B2 is a torsion spring. The two ends of the torsion spring abut against the clamp bodies A1 and B1 respectively, and the central shaft of the torsion spring is sleeved on the hinge C.

[0089] As shown in Figures 10-15, the clamp bodies A1 and B1 are single-sided covering structures and cooperate with the clamp heads A3 and B3. The clamp bodies are provided with snap-fit ​​structures A1-2 and B1-2 that cooperate with the clamp heads. The snap-fit ​​structures A1-2 and B1-2 reduce shaking during cutting and improve operational stability by accurately positioning the connection between the clamp heads and the clamp bodies.

[0090] Example 3 - The side of the pliers head opposite the top surface is not narrowed.

[0091] This embodiment uses the non-narrowed pliers head structure described in claim 1 (without adopting the thickness narrowing design of claim 2), and is suitable for trimming harder nails.

[0092] As shown in Figures 16-18, the clamp heads A3 and B3 do not narrow on the side opposite to the top surface, but still retain the core features of claim 1:

[0093] The pliers head has a 4-sided, 4-edge (top, side, inner bevel, and transition narrow face) bent structure, with a length of 21mm. The top surfaces A3-1 and B3-1 are concave arcs that gradually narrow to the tip, with widths c1=6mm and c2=0.5mm, and the arc-shaped top surface conforms to the curvature of the fingernail. The side surfaces A3-2 and B3-2 form an angle β=90° with the top surfaces A3-1 and B3-1. The inner bevel surfaces A3-3 and B3-3 form a 30° cutting section with the top surfaces A3-1 and B3-1. The active cutting surfaces A4-1 and B4-1 are coplanar with the inner bevel surfaces A3-3 and B3-3. The transition narrow faces A3-4 and B3-4 have a convex arc shape in cross-section (width 1.8mm). The overall structure of the pliers head is stable yet sharp. The line connecting the tip of the top surface and the inflection point of the bend forms a 170° angle with the axis of the sides A1 and B1 of the pliers body. Angle (α) makes it easier to use;

[0094] When the pliers heads A3 and B3 are closed, an oval hole K is formed in the middle of one end of the pliers body A1 and B1. Its shape, position and function are consistent with those shown in Figure 1 of Embodiment 1. This hole ensures the strength of the pliers head while facilitating the removal of cutting debris and the observation of the cutting position (corresponding to claim 6).

[0095] The elastic reset component Q adopts a torsion spring structure, with the two ends of the torsion spring abutting against the clamp body A1 and B1 respectively. The installation method is the same as that shown in Figures 6 and 9 of Embodiment 1. It is sleeved on the hinge component C to achieve automatic reset (corresponding to claims 7-8).

[0096] The clamp body adopts a two-sided split structure, and the clamp head is engaged with the guide ribs (which are consistent with the structure of guide ribs A1-1 and B1-1 shown in Figure 6) to enhance stability (corresponding to claims 9 and 11).

[0097] In the description of this specification, the references to terms such as "embodiment," "embodiment one," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0098] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A nail clipper, characterized in that, include: - A first clamp body (A) and a second clamp body (B), which are hinged together at the middle clamp body (A1, B1) by a hinge (C); - The first clamp body (A) and the second clamp body (B) respectively include a clamp handle (A2, B2) at the rear end and a clamp head (A3, B3) at the front end. - The pliers heads (A3, B3) are bent and raised to one side, with an overall length of 12-25mm, and have a multi-faceted bent structure with 3-5 ridges, including: - The top surface (A3-1, B3-1) is concave arc-shaped along the length direction, and gradually narrows to a sharp point from the bend to the outer end; along the transverse direction, the top surface (A3-1, B3-1) is flat. - The included angle β formed by the intersection of the side surfaces (A3-2, B3-2) and the top surface (A3-1, B3-1) satisfies 80°≤β≤100°; the side surfaces (A3-2, B3-2) are straight or slightly convex arc-shaped, and gradually narrow from the bend to the outer end to form a sharp shape; - The inner inclined surfaces (A3-3, B3-3) intersect with the top surfaces (A3-1, B3-1) to form a shear section (A4, B4) at a 25° to 55° angle; the inner inclined surfaces (A3-3, B3-3) gradually narrow from wide to pointed. - The shearing portions (A4, B4) include: The active cutting surfaces (A4-1, B4-1) are located at the edges of the inner inclined surfaces (A3-3, B3-3), and the active cutting surfaces (A4-1, B4-1) and the inner inclined surfaces (A3-3, B3-3) are on the same plane; or the active cutting surfaces (A4-1, B4-1) and the inner inclined surfaces (A3-3, B3-3) form an angle θ, where θ is 5° to 30°, and the root of the active cutting surface is connected to the inner inclined surface; The driven cutting surfaces (A4-2, B4-2) are located at the edge of the top surface (A3-1, B3-1) and are coplanar with the top surface (A3-1, B3-1); when the jaws (A3, B3) are closed, the driving cutting surfaces (A4-1, B4-1) and the driven cutting surfaces (A4-2, B4-2) are completely in contact, forming a shearing fit; - The line connecting the tip of the top surface (A3-1, B3-1) and the inflection point of the bend forms an angle of 120°≤α≤170° with the axis of the side of the clamp body (A1, B1); - The intersection of the side surfaces (A3-2, B3-2) and the inner bevel surfaces (A3-3, B3-3) is polished to form a transitional narrow surface (A3-4, B3-4). The cross-section of the transitional narrow surface is convex arc-shaped and the width is 0.5 to 2 mm to avoid scratching the skin during trimming.

2. The nail clipper according to claim 1, characterized in that, The clamp heads (A3, B3) narrow inward on the side opposite to the top surface (A3-1, B3-1), with the thickness reduction being 1 / 6 to 1 / 2 of the combined thickness of the front end of the clamp body. This thickness reduction makes the clamp head tip sharper and reduces shearing resistance.

3. The nail clippers according to claim 1, characterized in that, The width of the pliers (A3, B3) gradually narrows from the width c1 at the bend to the width c2 at the tip, forming a sharp shape, wherein 3mm≤c1≤7mm and 0.2mm≤c2≤1.5mm.

4. The nail clippers according to claim 1, characterized in that, The thickness of the clamp heads (A3, B3) gradually narrows from the thickness e1 at the narrowed recess to the thickness e2 at the tip, forming a sharp shape, wherein 3mm≤e1≤6mm and 0.2mm≤e2≤1mm.

5. The nail clippers according to claim 1, characterized in that, The included angle β formed by the intersection of the side surface and the top surface is 90°.

6. The nail clippers according to claim 1, characterized in that, When the clamp heads (A3, B3) are closed, a square, oval, or kidney-shaped hole (K) is formed in the middle of the end near the clamp body (A1, B1) for discharging shear chips.

7. The nail clippers according to claim 1, characterized in that, It also includes an elastic reset element (Q) disposed inside the clamp body (A1, B1) or between the clamp handles (A2, B2); the elastic reset element is a spring, used to realize the automatic reset of the clamp body.

8. The nail clipper according to claim 7, characterized in that, The elastic reset component (Q) is a torsion spring, with its two ends abutting against the clamp body (A1, B1) respectively, and the central shaft of the torsion spring is sleeved on the hinge component (C).

9. The nail clippers according to claim 1, characterized in that, The clamp body (A1, B1) is a split structure, including a two-sided split type or a single-sided covering type, and it cooperates with the clamp head (A3, B3).

10. The nail clippers according to claim 9, characterized in that, The mortise and tenon joint structure of the split-type mortise and tenon joint includes guide ribs (A1-1, B1-1) or snap-fit ​​structure (A1-2, B1-2).

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