Hair follicle scalpel

Abstract

The hair follicle scalpel comprises a scalpel head part located at the front end, a transition part located in the middle and a scalpel handle part located at the rear end, the scalpel head part and the scalpel handle part are cylindrical, the transition part is a circular truncated cone, extraction holes are formed in the scalpel head part, the transition part and the scalpel handle part, and a follicle taking opening is formed in the hair follicle scalpel. The capsule taking opening extends from the knife head part side to the knife handle part side, the capsule taking opening is communicated with the taking hole, the length of the capsule taking opening is 7-8 mm, and the width of the capsule taking opening is 0.1-0.13 mm; the length of the cutter head part is 4-5.4 mm, the length of the cutter handle part is 8-10 mm, and the concentricity of the cutter head part, the transition part and the cutter handle part is within 0.02 mm; a cutting edge is formed on the tool bit part, the cutting edge consists of an outer edge and an inner edge, the inclined plane angle of the outer edge is 3-4 degrees, the inclined plane angle of the inner edge is-4--3 degrees, and the cutting edge is 0.002-0.004 mm.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a hair follicle scalpel. Background Art

[0002] A follicle scalpel is a medical device used in hair follicle-related surgeries. During a hair transplant, the doctor can use it to precisely extract healthy hair follicles from a donor area (such as the back of the head), minimizing damage to the follicles and ensuring their survival rate after transplantation. In the recipient area (such as a bald area), the follicle scalpel can be used to precisely create tiny channels suitable for follicle implantation, allowing the extracted follicles to be successfully implanted.

[0003] Figure 1 This is a schematic diagram of the structure of an existing hair follicle scalpel. Figure 2 It is a schematic diagram of the blade structure of an existing hair follicle scalpel, such as Figure 1 and Figure 2 As shown, the existing hair follicle scalpel is made of stainless steel and includes a handle 100 and a blade head 200. A cutting edge 300 is formed at the end of the blade head 200, and the cutting edge 300 is arranged outward to form an outer blade. The bevel angle of the cutting edge 300 is 15°, the length L of the blade head 200 is 8 mm, and the aperture D of the extraction hole of the blade head 200 is 0.8 or 1 mm.

[0004] When using the existing hair follicle scalpel, the handle 100 is first clamped onto the hair follicle extraction instrument so that the cutter head 200 is exposed from the hair follicle extraction instrument. The surgeon performing the hair follicle extraction inserts the cutter head 200 into the human scalp. Then, under the action of the hair follicle extraction instrument, the hair follicle scalpel rotates at high speed. Because the high-speed rotating hair follicle scalpel is provided with a cutting edge 300, the cutter head 200 can cut off the tissue around the hair follicle. As the rotating hair follicle scalpel continues to be inserted, the hair follicle can be completely extracted into the extraction hole of the cutter head 200. Then, the extracted hair follicle is removed from the cutter head 200, and the removed hair follicle can be transplanted.

[0005] The length of human scalp hair follicles is generally 3mm to 5mm. Therefore, the length of the blade head of the existing hair follicle scalpel is relatively too long. The surgeon performing hair follicle extraction generally inserts the entire blade head 200 into the scalp, which can easily lead to damage to the scalp capillaries when extracting the hair follicles. As a result, it takes a long time for the scalp at this location to repair later. At the same time, because the blade 300 is an outer blade, the blade diameter at the blade position is consistent with the aperture of the extraction hole, which can easily damage the hair follicles when extracting the hair follicles, thereby affecting the survival rate of the hair follicles. In addition, the existing hair follicle scalpels are difficult to meet the requirements of high-precision surgery in terms of blade accuracy, concentricity and surface finish. In addition, the traditional method of manufacturing hair follicle scalpels makes it difficult to ensure the consistency and stability of the hair follicle scalpels, which will affect the surgical effect and patient experience.

[0006] Therefore, the utility model provides a new hair follicle scalpel to meet the requirements of high-precision surgery. Utility Model Content

[0007] In view of the shortcomings of the existing technology, the utility model provides a hair follicle scalpel to meet the requirements of high-precision surgery. The specific technical solution is as follows:

[0008] A hair follicle scalpel comprises: a blade head at the front end, a transition portion in the middle, and a handle at the rear end; the blade head and the handle are cylindrical, the transition portion is a frustum; extraction holes are formed inside the blade head, the transition portion, and the handle; a capsule removal opening is provided on the hair follicle scalpel, extending from the blade head side toward the handle side, the capsule removal opening being connected to the extraction hole, the capsule removal opening having a length of 7 mm to 8 mm, and a width of 0.1 mm to 0.13 mm;

[0009] The length of the blade head is 4 mm to 5.4 mm, the length of the handle is 8 mm to 10 mm, and the concentricity of the blade head, the transition portion, and the handle is within 0.02 mm.

[0010] The cutting edge is formed on the cutting head, and the cutting edge consists of an outer cutting edge and an inner cutting edge. The bevel angle of the outer cutting edge is 3° to 4°, the bevel angle of the inner cutting edge is -4° to -3°, and the cutting edge is 0.002mm to 0.004mm.

[0011] Preferably, the outer diameter of the cutter head is 0.95 mm to 1.1 mm, and the inner diameter of the cutter head is 0.75 mm to 0.9 mm.

[0012] Preferably, the inner diameter of the transition portion is 0.75 mm to 0.9 mm.

[0013] Preferably, the outer diameter of the handle portion is 1.5 mm to 2.35 mm, and the inner diameter of the handle portion is 0.75 mm to 0.9 mm.

[0014] Preferably, the surface finish of the hair follicle scalpel is Ra0.03~Ra0.08.

[0015] Compared with the existing technology, the utility model has the following beneficial effects:

[0016] 1. This utility model simplifies the existing hair follicle scalpel, making the entire structure simpler. The hair follicle scalpel is made of a special composite ceramic material. During production, the concentricity of each part of the hair follicle scalpel is maintained within 0.02mm, giving the hair follicle scalpel a high concentricity. The high concentricity of the hair follicle scalpel enables high-precision surgery and can improve the survival rate of hair follicles.

[0017] 2. The cutting edge of the hair follicle scalpel in this utility model is composed of an outer blade and an inner blade. This ensures that the aperture at the cutting edge is inconsistent with the aperture of the extraction hole, which can reduce trauma. In addition, the bevel angle of the outer and inner blades is limited, which makes the hair follicle scalpel have a sharper and thinner cutting edge. At the same time, the cutting edge is 0.002mm~0.004mm, achieving an ultra-fine cutting edge and high cutting edge precision. This can avoid causing large wounds on the scalp when cutting and extracting hair follicles, thereby improving the survival rate of hair follicles.

[0018] 3. The length of the hair follicle scalpel blade in this utility model is set according to the length of the scalp hair follicles. The length of the blade head is set at 4mm to 5.4mm, which matches the length of the scalp hair follicles. This prevents the blade head from being excessively inserted into the scalp, thereby preventing scalp damage and further avoiding damage to the hair follicles, thereby improving the survival rate of hair follicles.

[0019] 4. The hair follicle scalpel of this utility model is provided with a follicle removal opening. The follicle removal opening is arranged on the side of the hair follicle scalpel and extends from the blade head side toward the handle side. When the extracted hair follicle enters the extraction hole, the follicle can be removed from the hair follicle scalpel through the follicle removal opening, thereby improving the convenience of operation of the hair follicle scalpel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0021] Figure 1 It is a structural diagram of an existing hair follicle scalpel;

[0022] Figure 2 It is a schematic diagram of the blade structure of an existing hair follicle scalpel;

[0023] Figure 3 This is a schematic structural diagram of the hair follicle scalpel of the present utility model;

[0024] Figure 4 This is a schematic diagram of the blade structure of the hair follicle scalpel of the present utility model;

[0025] Figure 5 This is a schematic diagram of the blade structure of the hair follicle scalpel provided by the utility model;

[0026] Figure 6 This is a comparison diagram of the blade structure of the hair follicle scalpel provided by the utility model. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0029] In the description of this utility model, "several" means one or more, "more" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first," "second," and "third" are used solely for descriptive purposes and to distinguish technical features, and are not to be construed as indicating or implying relative importance, or implicitly specifying the number or order of the technical features indicated.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0031] See Figure 3 and Figure 4 The hair follicle scalpel in the present invention includes: a blade head 1 at the front end, a transition part 2 located in the middle, and a handle part 3 located at the rear end. The blade head 1 and the handle part 3 are cylindrical, and the transition part 2 is a frustum. An extraction hole 6 is formed inside the blade head 1, the transition part 2, and the handle part 3. The hair follicle scalpel is provided with a capsule removal opening 4, which extends from the side of the blade head 1 to the side of the handle part 3. The capsule removal opening 4 is connected to the extraction hole 6. A cutting edge 5 is formed on the blade head 1, and the cutting edge 5 consists of an outer blade 51 and an inner blade 52.

[0032] Specifically, the blade head 1, the transition portion 2, and the handle portion 3 are integrally formed. The handle portion 3 is used to attach to a hair follicle extraction instrument, thereby enabling the installation of a hair follicle scalpel, while the blade head 1 and the cutting edge 5 thereon are used to cut and extract hair follicles. The transition portion 2 is configured as a frustum to better connect the blade head 1 and the handle portion 3, which have different outer diameters. This creates a transition structure between the blade head 1 and the handle portion 3, avoiding stress concentration at the direct connection between the blade head 1 and the handle portion 3, which have different outer diameters. This allows for more uniform force transmission from the handle portion 3 to the blade head 1, effectively reducing stress mutations caused by rotational speed changes or external forces, and lowering the risk of fracture at the connection between the blade head 1 and the handle portion 3.

[0033] See Figure 3 The length of the follicle removal opening 4 is 7 mm to 8 mm, and the width of the follicle removal opening 4 is 0.1 mm to 0.13 mm. The follicle removal opening 4 is connected to the extraction hole 6 inside the hair follicle scalpel. The hair follicles extracted by the blade head 1 enter the extraction hole 6. The follicle removal opening 4 is configured to extend from the blade head 1 toward the handle 3 and exceed the transition portion 2. This is to facilitate the removal of hair follicles from the extraction hole 6 from the blade head 1 when the hair follicle scalpel is clamped by the hair follicle extraction instrument, thereby improving the convenience of follicle removal.

[0034] See Figure 3The length L1 of the blade head 1 is 4 mm to 5.4 mm, the length L2 of the shank 3 is 8 mm to 10 mm, and the concentricity of the blade head 1, the transition portion 2, and the shank 3 is within 0.02 mm. The step bevel angle of the transition portion 2 is 18° to 20°.

[0035] Specifically, since scalp hair follicles are generally 3mm to 5mm long, the length L1 of the blade head 1 is set to 4mm to 5.4mm, typically 5.4mm. This allows for complete extraction of hair follicles without damaging scalp capillaries due to an excessively long blade head 1. The length of the handle 3 is set to ensure that the hair follicle scalpel is stably mounted on the hair follicle extraction instrument.

[0036] Specifically, the follicle scalpel rotates at high speed during follicle extraction. Rotation of the handle 3 causes the entire follicle scalpel to rotate, thereby cutting and extracting the follicles. If the concentricity between the blade head 1 and the handle 3 is poor, the blade head 1 rotates as the handle 3 rotates, but the blade head 1 generates an irregular force distribution when entering the scalp, causing uneven pressure and tension on the hair follicles, which can easily cause follicle deformation, rupture, or partial damage, significantly reducing the survival rate of the follicles. Furthermore, poor concentricity means that the central axis of the follicle scalpel deviates significantly from the desired axis for actual operation. This makes it difficult for the surgeon to accurately control the insertion direction and depth of the blade head 1 during follicle extraction, resulting in inaccurate extraction positioning, damage to surrounding healthy follicles and tissue, and reduced quality and success rate of follicle extraction. The concentricity of the blade head 1, the transition portion 2, and the handle 3 of the follicle scalpel of the present invention is within 0.02 mm, enabling the follicle scalpel to perform high-precision surgeries while improving the survival rate of hair follicles.

[0037] See Figure 3 and Figure 4 A cutting edge 5 is formed on the cutter head 1, and the cutting edge 5 consists of an outer cutting edge 51 and an inner cutting edge 52. The bevel angle of the outer cutting edge 51 is 3°~4°, the bevel angle of the inner cutting edge 52 is -4°~-3°, and the cutting edge 5 is 0.002mm~0.004mm.

[0038] Specifically, the cutting edge of the hair follicle scalpel provided by the present invention differs from that of existing hair follicle scalpels. Existing hair follicle scalpels use an outer blade, which has a uniform diameter at the cutting edge. However, because the hair follicle has a pocket-shaped structure, with a smaller upper portion and a larger lower portion, a uniform cutting edge diameter can easily damage the follicle during extraction, affecting its survival rate. The cutting edge of the hair follicle scalpel provided by the present invention, however, uses an outer blade 51 and an inner blade 52. The diameter of the cutting edge is inconsistent with, and larger than, the diameter of the extraction hole. This design targets the shape and structure of the hair follicle to improve its survival rate during extraction.

[0039] For details, see Figure 4 and Figure 5 The tip formed by the intersection of the outer blade 51 and the inner blade 52 is impossible to be processed into a sharp point in the actual processing process. Figure 4 The theoretical absolute tip is shown. The tip formed by the intersection of the outer blade 51 and the inner blade 52 of the actual processed hair follicle scalpel under a high-power microscope is as follows: Figure 5 As shown, the intersection of the outer blade 51 and the inner blade 52 appears sharp to the naked eye, but in reality, the intersection of the outer blade 51 and the inner blade 52 has an invisible width. The 0.002mm-0.004mm of the cutting edge 5 represents the width B of the intersection of the outer blade 51 and the inner blade 52 as observed under a high-power microscope. This width determines the sharpness of the hair follicle scalpel. The minimum width of the intersection of the outer blade 51 and the inner blade 52 is 0.002mm, which is only 0.001 of two units. Therefore, the hair follicle scalpel of the present invention has a higher sharpness.

[0040] See Figure 4 and Figure 6 Specifically, the outer blade 51 and the inner blade 52 of the cutting edge 5 have the same bevel angle, and the angle value is 3°~4°. Figure 6 The cutting edge 5 represented by the dashed line is a cutting edge 5 composed of an outer blade 51 and an inner blade 52 with a bevel angle of 3°, while the cutting edge 5 represented by the solid line is a cutting edge 5 composed of an outer blade 51 and an inner blade 52 with a bevel angle of 15°. Under the premise that the outer and inner blades are of the same length, the cutting edge 5 composed of an outer blade and an inner blade with a smaller bevel angle can make the tube wall of the blade head 1 thinner, and the entire cutting edge 5 is thinner and sharper. This can avoid causing large wounds on the scalp when cutting and extracting hair follicles, because excessive wounds can cause damage such as squeezing, stretching, or tearing of the hair follicles during the extraction process, thereby reducing the survival rate of the hair follicles. At the same time, large wounds can cause more bleeding and increase the possibility of scarring after healing. Therefore, the hair follicle scalpel in the present invention can further improve the survival rate of hair follicles and reduce the increase in postoperative risks.

[0041] In a preferred embodiment, the outer diameter of the blade head 1 is 0.95 mm to 1.1 mm, and the inner diameter of the blade head 1 is 0.75 mm to 0.9 mm. The inner diameter of the blade head 1 is also the diameter of the extraction hole 6. The blade head 1 within this numerical range is suitable for the general population and ensures the survival rate of the extracted hair follicles. In a preferred embodiment, the inner diameter of the transition portion 2 is 0.75 mm to 0.9 mm. The inner diameter of the transition portion 2 is also the diameter of the extraction hole 6.

[0042] In a preferred solution, the outer diameter of the handle portion 3 is 1.5 mm to 2.35 mm, and the inner diameter of the handle portion 3 is 0.75 mm to 0.9 mm. The inner diameter of the handle portion 3 is also the aperture of the extraction hole 6 .

[0043] In a preferred embodiment, the surface finish of the hair follicle scalpel is Ra0.03-Ra0.08. Specifically, the surface finish of the outer blade 51 and the inner blade 52 of the hair follicle scalpel is Ra0.03, and the surface finish of the rest of the hair follicle scalpel is Ra0.08.

[0044] Example 1

[0045] This embodiment 1 provides a hair follicle scalpel, the total length of the hair follicle scalpel is 17 mm ± 0.5 mm, the effective length of the blade head 1 is 7 mm ± 0.5 mm, the effective length of the blade head 1 includes the length of the blade head 1 itself and the length of the transition portion 2, wherein the length of the blade head 1 itself is 5.4 mm ± 0.5 mm, the installation length of the handle 3 is 10 mm ± 0.5 mm, the aperture of the extraction hole 6 of the hair follicle scalpel is 0.75 mm ± 0.05 mm, that is, the entire inner diameter of the hair follicle scalpel is 0.75 mm ± 0.05 mm, the outer diameter of the blade head 1 is 0.95 mm ± 0.05 mm, the outer diameter of the handle 3 is 1.5 mm ± 0.05 mm, the step bevel angle of the transition portion 2 is 19.5°, the bevel angle of the outer blade 51 is 4°, the bevel angle of the inner blade 52 is -4°, the cutting edge 5 is 0.002 mm, and the length of the follicle extraction opening 4 is 8 The width of the follicle extraction opening 4 is 0.1 mm. The hair follicle scalpel provided in Example 1 can ensure the survival rate of the extracted hair follicles to the greatest extent.

[0046] The present invention also provides a method for manufacturing the hair follicle scalpel described above, the manufacturing method comprising the following steps:

[0047] S1. Injecting the modulated special composite ceramic material into a mold and heating the mold to shape the special composite ceramic material in the mold to obtain a cylindrical initial workpiece.

[0048] The special composite ceramic material is formed by mixing a specific ratio of ingredients. Unlike existing ceramic materials used for scalpels, this special composite ceramic material can make the hair follicle scalpel different from existing stainless steel scalpels and make it easier to process the scalpel with high precision and a sharper edge. Furthermore, the special composite ceramic material, formed by mixing a specific ratio of ingredients, gives the scalpel a higher hardness, making it less prone to wear during use and maintaining its sharpness for a long time. In contrast, metal scalpels may become blunt after repeated use, requiring frequent replacement.

[0049] Specifically, after the prepared special composite ceramic material in step S1 is injected into the mold, the mold is heated to 170° C. to 200° C. for 5 minutes to 8 minutes.

[0050] For example, when manufacturing the hair follicle scalpel in Example 1, the prepared special composite ceramic material is injected into a mold having a circular cavity, and then the mold is heated to 180° C. for 5 minutes.

[0051] S2. The initial workpiece in step S1 is subjected to a degreasing, debinding and sintering treatment, wherein the sintering treatment includes: placing the initial workpiece in a special furnace, heating it to 450°C~600°C, and sintering it for 60 hours, then cooling the initial workpiece to room temperature, placing the cooled initial workpiece in a special furnace again, heating it to 1500°C~1800°C, and sintering it for 24 hours~40 hours to obtain a prefabricated workpiece.

[0052] Specifically, since the material used for the hair follicle scalpel is a specially formulated composite ceramic material, the heated and formed cylindrical initial workpiece needs to be degreased and sintered to ensure that the hair follicle scalpel has high hardness. After the cylindrical initial workpiece is sintered for the first time, the sintered initial workpiece needs to be cooled. During cooling, water should not be poured on the initial workpiece, and it should be cooled naturally or with air. The process parameters for the two sintering processes of the formed initial workpiece are set according to the special composite ceramic material. The hair follicle scalpel made of the special composite ceramic material under these process parameters can meet the requirements of high-precision surgery in terms of hardness and strength.

[0053] S3, grinding the outer diameter of the prefabricated workpiece obtained in step S2, grinding the initial workpiece to the outer diameter size of the hair follicle scalpel, and processing the length to the specified length.

[0054] Specifically, step S3 involves machining the exterior of the follicle scalpel. Specifically, the prefabricated workpiece, which has undergone degreasing, binder removal, and sintering, is ground until the entire workpiece reaches the outer diameter of the scalpel's handle 3. The workpiece is then ground to a desired length, which typically exceeds the overall length of the scalpel to facilitate subsequent adjustments to the workpiece dimensions. During grinding, the surface finish of the prefabricated workpiece is maintained within Ra 0.08.

[0055] For example, when manufacturing the hair follicle scalpel in Example 1, the entire circular prefabricated workpiece after molding is ground to an outer diameter of 1.5 mm, with an outer diameter tolerance controlled at ±0.05 mm during grinding, and then the length of the ground prefabricated workpiece is processed to 20 mm.

[0056] S4. Perform inner diameter machining on the prefabricated workpiece obtained in step S3, and calibrate the concentricity during machining so that the concentricity of the inner diameter and the outer diameter of the prefabricated workpiece is within 0.02 mm.

[0057] Specifically, step S4 is to process the extraction hole of the hair follicle scalpel, and the inner diameter of the prefabricated workpiece obtained in step S3 is processed to the aperture of the extraction hole. During processing, the concentricity of the inner diameter and the outer diameter must be ensured to be within 0.02 mm.

[0058] For example, when processing the hair follicle scalpel in Example 1, an extraction hole is processed on the circular prefabricated workpiece with an outer diameter of 1.5 mm and a length of 20 mm. The diameter of the extraction hole is processed to 0.75 mm, and the diameter tolerance is controlled at ±0.05 mm.

[0059] S5. Processing the cutting edge of the prefabricated workpiece obtained in step S4, wherein the circular runout tolerance is controlled within 0.002 mm during the cutting edge processing, and the smoothness of the cutting edge bevel is Ra0.03.

[0060] Specifically, when processing the cutting edge 5 of the hair follicle scalpel, the outer blade 51 and the inner blade 52 of the cutting edge 5 need to be processed, which can be done using a dedicated circular grinding machine. At the same time, during grinding, the circular runout tolerance of the outer blade and the inner blade must be ensured to be within 0.002mm.

[0061] For example, when processing the cutting edge of the hair follicle scalpel in Example 1, the cutting edge 5 of the prefabricated workpiece with the extraction hole processed can be processed first and then the outer cutting edge. When using a dedicated circular grinding machine for processing, the surface finish of the outer cutting edge 51 and the inner cutting edge 52 must be ensured to be Ra0.03.

[0062] S6. Perform step processing and tool head processing on the prefabricated workpiece obtained in step S5, wherein the circular runout tolerance is controlled within 0.005 mm and the surface finish is within Ra0.08 during processing.

[0063] Specifically, step S6 is to process the transition part 2 and the blade head 1 of the hair follicle scalpel, and the blade head 1 and the transition part 2 are also ground using a special circular grinding machine, wherein the surface finish except the outer blade 51 and the inner blade 52 is Ra0.03, and the surface finish of the rest of the hair follicle scalpel is within Ra0.08.

[0064] For example, when machining the transition portion 2 and blade head 1 of the hair follicle scalpel described in Example 1, the prefabricated workpiece, which has already been edge-machined, is ground to machine the blade head 1 and transition portion 2. During grinding, the length of the transition portion 2 is ensured to be 1.6 mm ± 0.05 mm, the length of the blade head 1 is 5.4 mm ± 0.5 mm, and the outer diameter of the blade head 1 is 0.95 mm ± 0.05 mm. This essentially completes the outer diameter of the handle 3, the entire inner diameter of the hair follicle scalpel, the transition portion 2, and the blade head 1.

[0065] S7, processing the prefabricated workpiece obtained in step S6 to remove the follicle opening, thereby obtaining a hair follicle scalpel.

[0066] Specifically, step S6 involves machining the follicle retrieval opening 4 of the follicle scalpel. For example, when machining the follicle retrieval opening 4 of the follicle scalpel described in Example 1, the follicle scalpel, after machining the blade head 1 and transition portion 2, is slotted. A slot with a length of 8 mm ± 0.05 mm and a width of 0.1 mm is machined from the blade head 1 toward the handle 3. This slot is connected to the follicle scalpel's extraction hole. The handle 3 is then machined to length, bringing the entire follicle scalpel, which is 20 mm long, to a total length of 17 mm ± 0.5 mm. Alternatively, the circular initial workpiece obtained from the mold can be initially machined to a total length of 17 mm ± 0.5 mm, and then the remaining parts can be machined.

[0067] In summary, the hair follicle scalpel provided by the utility model has the characteristics of sharper blade, high concentricity and good surface finish, which can meet the requirements of high-precision hands, thereby reducing trauma during surgery, improving surgical effects and patient satisfaction.

[0068] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of illustration and description. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials or characteristics described can be combined in an appropriate manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various different choices and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A hair follicle scalpel, characterized in that: The hair follicle scalpel comprises: a blade head at the front end, a transition portion at the middle, and a handle portion at the rear end. The blade head and the handle portion are cylindrical, and the transition portion is a frustum. Extraction holes are formed inside the blade head, the transition portion, and the handle portion. The hair follicle scalpel is provided with a capsule removal opening, which extends from the blade head side to the handle side and is connected to the extraction hole. The length of the capsule removal opening is 7 mm to 8 mm, and the width of the capsule removal opening is 0.1 mm to 0.13 mm. The length of the blade head is 4 mm to 5.4 mm, the length of the handle is 8 mm to 10 mm, and the concentricity of the blade head, the transition portion and the handle is within 0.02 mm. Among them, a cutting edge is formed on the cutter head, and the cutting edge consists of an outer edge and an inner edge. The bevel angle of the outer edge is 3° to 4°, the bevel angle of the inner edge is -4° to -3°, and the cutting edge is 0.002mm to 0.004mm.

2. A hair follicle scalpel according to claim 1, characterized in that: The outer diameter of the cutter head portion is 0.95 mm to 1.1 mm, and the inner diameter of the cutter head portion is 0.75 mm to 0.9 mm.

3. The hair follicle scalpel according to claim 1, characterized in that: The inner diameter of the transition portion is 0.75 mm to 0.9 mm.

4. The hair follicle scalpel according to claim 1, characterized in that: The outer diameter of the handle portion is 1.5 mm to 2.35 mm, and the inner diameter of the handle portion is 0.75 mm to 0.9 mm.

5. The hair follicle scalpel according to claim 1, characterized in that: The surface finish of the hair follicle scalpel is Ra0.03-Ra0.08.

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