Hair implanting device

Abstract

The utility model discloses a hair transplantation device which is mainly composed of a puncture needle, a hollow part, a shell, a pressing ejector pin and a spring. The shell is divided into a front shell and a rear shell which are detachable, and the interior is limited through a step structure; the hollow part comprises an extending head and a positioning rod, and the positioning rod is provided with a needle seat groove with two through sides and a step limiting structure; a sharp tip and a hair follicle placing groove are arranged at the top end of a needle tube of the puncture needle, and a needle seat is meshed with the shell through threads and embedded into a needle seat groove to slide. The ejector pin and the spring are installed at the tail of the hollow part in a linkage mode, the hollow part is controlled to move front and back through pressing, and stretching and retracting of the puncture needle are achieved. The device adjusts the puncture depth through rotation, the pressing operation is rapid to reset, the structure is compact, the operation is accurate, the hair transplanting efficiency can be improved, and the risk of hair follicle damage can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of medical surgery, specifically relating to a hair transplant device. Background Technology

[0002] In modern society, the fast pace of life and increasing pressure have made hair loss a more and more common problem, affecting people of all ages and professions. Globally, the number of people troubled by hair loss continues to rise. Hair loss not only severely impacts a patient's appearance but also negatively affects their mental health and social activities, thus creating a strong demand for efficient and safe hair transplantation technology. Hair transplantation surgery, as an important means of solving hair loss problems, is receiving increasing attention.

[0003] Currently, autologous hair transplantation is the mainstream method for treating hair loss, mainly including two operation modes: one is the traditional manual mode of "drilling holes first and then implanting hair", that is, drilling holes in the scalp first and then implanting hair follicles into the holes; the other is using a push-in hair transplant pen to complete the hair follicle implantation at the same time as drilling holes.

[0004] However, existing hair transplant pen devices on the market have many shortcomings that urgently need to be addressed:

[0005] Unreasonable structural design

[0006] Most hair transplant pens have complex structures and poor durability, making them prone to deformation and damage during use. In particular, the hollow component and the protruding head are often designed as a single unit, which cannot be disassembled, causing significant inconvenience in use and installation. If these two components malfunction during surgery, the inability to quickly replace them not only delays the procedure but also increases the time hair follicles are exposed to air, reducing their survival rate. Furthermore, the non-removable design makes thorough cleaning and disinfection difficult, hindering the removal of dirt and bacteria and increasing the risk of postoperative infection, thus failing to meet the requirements of efficient and safe hair transplant surgery.

[0007] The needle extension length is not adjustable.

[0008] Hair transplant surgery requires doctors to precisely control the drilling depth based on the patient's scalp condition, the area to be transplanted, and the characteristics of the hair follicles. However, current hair transplant pens lack adjustable needle extension length, resulting in inconsistent puncture depths. Drilling too deep can cause mechanical damage to the hair follicles, disrupting their internal structure and affecting nutrient supply; drilling too shallow cannot provide sufficient space for the hair follicles to take root, leading to unstable follicle roots and easy shedding. This seriously affects the quality of the surgery and the survival rate of the hair follicles, hindering the development of hair transplant surgery.

[0009] Hair follicle placement slot design flaws

[0010] Precise implantation of hair follicles is key to successful hair transplantation, but the current hair follicle placement slot design of hair transplant devices is too simplistic and has significant shortcomings:

[0011] Lack of a continuous, unobstructed follicle placement slot: Most existing hair transplant devices lack a continuous, unobstructed follicle placement slot that opens from the back of the pointed tip of the needle and connects to the inside of the tip. In practice, this leads to frequent jamming and bending during follicle placement, making it difficult for doctors to accurately push the follicles to the target location. Inaccurate follicle placement severely affects the establishment of nutrient exchange channels between the follicles and surrounding tissues, reducing follicle survival rates. Conversely, hair transplant devices with a continuous, unobstructed follicle placement slot have a significant advantage when dealing with large areas of baldness or complete baldness. Doctors can quickly and clearly observe the follicle implantation status without obstruction, greatly improving the accuracy and success rate of the transplant.

[0012] Lack of Adjustable Extension Length Hair Follicle Placement Gauges: Existing hair follicle placement gauges lack a design where the front end is not directly connected to the sharp tip, the rear end is lengthened, and the extension length can be flexibly adjusted along a specific direction on the side wall of the needle. In areas with mild hair loss, such as localized or single-point transplantation, native hair can obstruct the doctor's view. Doctors often choose to shave the hair before transplantation, which not only affects postoperative aesthetics but also exposes the transplanted area, increasing the risk of infection. If a hair follicle placement gauge with adjustable extension length were available, doctors could maintain a certain distance between the hair follicle placement point and the hair root during localized transplantation, avoiding obstructed vision, achieving precise transplantation without shaving, and ensuring postoperative aesthetics and the safety of the transplanted area.

[0013] Lack of limiting structure

[0014] Hair transplant surgery demands extremely high precision, as the depth of needle puncture directly affects the rooting depth and survival rate of hair follicles. However, traditional hair transplant pens lack a limiting structure, making it difficult for doctors to control the needle's extension length and resulting in significant operational inconsistencies. On one hand, this leads to inconsistent implantation depths; excessively deep punctures can damage hair follicles and surrounding tissues, disrupting the growth microenvironment and hindering nutrient delivery; while insufficient depth fails to provide rooting space for the follicles, reducing the survival rate. On the other hand, unstable needles are prone to deviating from their intended trajectory, accidentally injuring other parts of the scalp and causing complications such as pain, bleeding, and infection, causing suffering for the patient and affecting the surgical process. Therefore, adding a limiting device to the hair transplant pen is urgently needed.

[0015] Needle tip angle has no reference mark

[0016] Hair transplant surgery is a complex procedure that requires adjustments based on each patient's scalp curvature, hair transplant area layout, and follicle implantation direction. However, traditional hair transplant pens lack reference markers for needle tip angle. When drilling, the needle becomes covered in blood, making it impossible for the doctor to visually determine the needle's angle. They must rely on visual estimation and manual adjustment of the pen's angle. This not only easily accelerates needle tip deformation and damage but also limits the doctor's operational flexibility, making the procedure cumbersome and increasing surgery time. Furthermore, mismatched angles can easily lead to operational errors, such as puncturing off-target or deviating from the intended position, affecting normal follicle growth, reducing survival rates, and causing uneven hair distribution, sparse hair in certain areas, or extensive follicle necrosis post-surgery. This reduces patient satisfaction and hinders the improvement of surgical quality.

[0017] Disadvantages of a single-sloping pointed design

[0018] Traditional hair transplant pens often use a single-slanted tip design, which has the following obvious drawbacks:

[0019] Insufficient structural strength: The single-beveled pointed structure makes the sharp part too thin, unable to withstand greater pressure during frequent punctures, and easily deformed and damaged. Concentrated puncture resistance: The single-beveled design causes the resistance to be concentrated on one bevel during puncture, unlike the multi-faceted needle which can distribute the resistance to multiple surfaces, increasing the difficulty of puncture and requiring greater force to complete the puncture. Low surgical efficiency: Because the needle is easily deformed and damaged, the hair transplant pen or needle needs to be replaced frequently, interrupting the surgical process, reducing the efficiency of drilling holes, and prolonging the surgical time.

[0020] Design defects of hair follicle groove and needle tip angle

[0021] Traditional hair transplant needles have a significant design flaw. The opening of the hair follicle placement slot is not on either side of the needle tip's axis, making it difficult to match the orientation of the hair follicle slot with the actual needle insertion angle.

[0022] During the rapid needle insertion procedure in hair transplant surgery, this angular deviation becomes apparent, causing numerous adverse effects. Firstly, it severely obstructs the doctor's view, hindering clear observation of follicle placement and needle insertion. Secondly, under external force, hair follicles within the graft are highly susceptible to displacement, and in severe cases, may even shift and fall out. This undoubtedly significantly interferes with the doctor's precise operation and can cause physical damage to the follicles due to collisions or friction. Once follicles are damaged, their survival rate after implantation will inevitably decrease, ultimately negatively impacting the overall outcome of the hair transplant surgery and preventing the achievement of the desired results.

[0023] Lack of needle protective cover

[0024] Traditional hair transplant pens do not have dedicated needle protective caps on their tips. During daily operation, storage, and handling, the needles are exposed, which can easily injure the hands of medical staff and poses a significant safety hazard.

[0025] Material and usage issues

[0026] Traditional hair transplant pens are mostly made of stainless steel and are reusable, which has many drawbacks. In terms of manufacturing, stainless steel is difficult to process, requiring specialized and complex equipment and sophisticated techniques. The production process is cumbersome, has a long production cycle, and is costly. When reused, dirt and bacteria easily remain on the stainless steel surface. Cleaning and disinfection require professional cleaning agents and multiple procedures. Even slight carelessness can lead to cross-infection, seriously threatening patient safety and hindering mass production.

[0027] In conclusion, developing a medical hair transplant device that can overcome the above-mentioned shortcomings and integrate high efficiency, safety, precision, and low cost is of great practical significance and has an urgent market demand. Utility Model Content

[0028] A hair transplant device, characterized in that it is mainly composed of a puncture needle (1), a hollow part (2), a shell (3), a pressing needle (4), a spring (5) and a protective sleeve (6);

[0029] The housing (3) is composed of a detachably connected front housing (302) and a rear housing (301), which are internally connected. The inner diameter (3021) of the front section of the front housing (302) is smaller than the inner diameter (3022) of the rear section, forming a step at the connection between the two. The inner side of the rear section is provided with a threaded structure (3023). The inner diameter (3011) of the front section of the rear housing (301) is larger than the inner diameter (3012) of the rear section, and a step is also formed on the inner side. The hollow part (2) is installed inside the housing (3) and is composed of a protruding head (201) and a positioning rod (202), which are internally connected. The positioning rod (202) is provided with a needle seat groove (2021), which is perpendicular to the axial direction of the positioning rod (202) and penetrates vertically on both sides. The side wall of the rod (202) has a front section outer diameter larger than the top section outer diameter, forming a first step structure (2023), and a middle section outer diameter larger than the front and rear sections outer diameter, forming a second step structure (2024); the head of the protruding head (201) has a conical structure (2011), and a marking point (2014) is provided on the outer side of the head; the puncture needle (1) consists of a needle seat (101) and a needle tube (102), which are connected inside. The head of the needle tube (102) has a sharp tip structure, and a hair follicle placement groove (103) is provided on the needle tube behind the sharp tip. The hair follicle placement groove (103) and the marking point (2014) on the head of the protruding head (201) are on the same side of the device axis, and the hair follicle placement groove (103) is located on the same side of the device axis. The sharp tip structure (105) is located on both sides of the axial direction of the device and is tilted in opposite directions at a certain angle. For example, if the hair follicle placement groove (103) is on the left side of the axial direction, the tip of the sharp tip structure (105) is on the right side of the axial direction, and the tilt angle of the sharp tip structure (105) is not parallel to the direction of the hair follicle placement groove (103), but has a specific included angle; the outer side of the needle seat (101) is circular and has a thread (1011), and the two sides of the axial direction are flat structures. The thickness of the flat structure is less than the width of the needle seat groove (2021). The puncture needle (1) is tilted, and the needle head is guided through the needle seat groove (2021) to the front end of the protrusion head (201). The needle seat (101) can move axially within the needle seat groove (2021) and the housing; the protrusion head (101) can move axially within the needle seat groove (2021) and the housing. The outer diameter of the head (201) is smaller than the inner diameter of the front section of the front housing (3021). The outer diameter of the top end of the positioning rod (202) is smaller than the inner diameter of the front section of the front housing (3021). The outer diameter of the front section is larger than the inner diameter of the front section of the front housing (3021) and smaller than the inner diameter of its rear section (3022). The inner diameter of the front section of the rear housing (301) is larger than the outer diameter of the middle section of the positioning rod (202). The inner diameter of the rear section is smaller than the outer diameter of the middle section of the positioning rod (202). The inner step of the front housing (302) forms an axial extension limit on the first step structure (2023) of the head of the positioning rod (202). The inner step of the rear housing (301) forms an axial retraction limit on the second step structure (2024) of the middle section of the positioning rod (202).The pressure pin (4) consists of a pressure pin (401) and a pressing member (402). The pressure pin (401) is axially mounted on the front end of the pressing member (402) and the two are concentrically arranged. The spring (5) is sleeved on the outside of the pressure pin (401) and its front end abuts against the pressing member (402). The pressure pin (4) passes through the pressure pin (401) from the inner side of the tail of the positioning rod (202) of the hollow part (2) to the tail of the needle seat of the puncture needle (1), and extends from the inside of the needle tube to the hair follicle placement at the head of the needle tube. At the groove (103), the front end of the pressing member (402) is fixedly connected to the tail end of the positioning rod (202). The front end of the spring (5) abuts against the tail end of the needle seat (101) and the rear end abuts against the front end of the pressing member (402). The natural length of the spring is greater than the distance from the tail end of the needle seat (101) to the front end of the pressing member (402). When the needle seat (101) and the pressing member (402) are assembled together, the needle seat is fixed to the inner thread of the housing by the thread, and the spring (5) is located in the middle of the two. And in a compressed state, under the continuous backward elastic force of the spring (5), the second step structure (2024) of the positioning rod (202) contacts the inner step of the rear housing (301) to form a limit, so that the hollow part (2) is kept in a specific axial position; when the entire device is assembled, the head of the needle tube (102) extends axially to the outer front end of the protrusion head (201), and the top of the ejector pin (401) is located at the front end of the protrusion head (201) and is located at the needle tube (102). The tip is located inside the axial point of the hair follicle placement groove (103); the hollow part (2) can rotate 360 ​​degrees inside the housing (3), and clamps the needle seat (101) by cooperating with the flat structure on both sides of the needle seat (101) through the needle seat groove (2021). The needle seat (101) is adjusted and fixed axially in the housing (3) by cooperating with the thread structure (3023) on the inner side of the housing (3) through the outer thread (1011).Throughout the entire forward and backward movement of the needle seat (101) within the housing (3), the spring (5) remains compressed. When the housing (3) is fixed and the pressing member (402) is rotated, the hollow part (2) and the puncture needle (1) rotate as a whole. When rotating clockwise, the needle seat (101) moves axially toward the front end of the housing under the threaded engagement. Due to the elastic force of the spring (5), the second step structure (2024) of the positioning rod (202) continues to contact the inner step of the rear housing (301). The axial forward and backward positions of the hollow part (2), the protruding head (201), and the pressing member (402) relative to the housing (3) remain unchanged. Only the needle seat (101) moves axially within the needle seat groove (2021) and within the housing, thereby causing the needle tube (102) to move toward the front end of the protruding head (201). When rotating counterclockwise, the needle seat (101) moves backward under the threaded engagement. The spring (5) remains compressed and continues to apply a backward elastic force to the hollow part (2). The second step structure (2024) of the positioning rod (202) is always in contact with the inner step of the rear housing (301). The needle tube (102) retracts backward. Based on the linkage between the protruding head (201), the positioning rod (202) and the pressing part (402), the axial extension length of the needle tube (102) can also be adjusted by rotating the protruding head (201). During this process, due to the elastic force of the spring (5), the second step structure (2024) of the positioning rod (202) is continuously in contact with the inner step of the rear housing (301) and the hollow part (2) remains unchanged in the axial front-back position inside the housing (3). Only by pressing the pressing part (402) to overcome the elastic force of the spring (5) will the axial front-back position of the hollow part (2) and the housing (3) change.When the fixed housing (3) is pressed against the pressing member (402) at its axial front end, the hollow member (2) moves axially towards the front end of the housing, and the protruding head (201) and the ejector pin (401) move forward synchronously. During this period, the axial position of the needle seat (101) and the needle tube (102) of the puncture needle (1) relative to the housing (3) remains unchanged. As the pressing is pushed forward, the first step structure (2023) of the head of the positioning rod (202) contacts the inner step of the front housing (302). When the two contacts, the front end of the protruding head (201) moves to the front of the needle tip of the needle tube (102), and at the same time, the front end of the ejector pin (401) also moves to the protruding position of the needle tip of the needle tube (102). The needle tip side is located at the protruding head (201). 1) On the inside, when the pressing part (402) is released, under the backward elastic force of the spring (5), the pressing part (402), the hollow part (2), the protruding head (201) and the ejector pin (401) move backward along the axial direction simultaneously. At this time, the second step structure (2024) of the positioning rod (202) contacts and limits the inner step of the rear housing (301). After the movement is completed, the needle tip of the needle tube (102) is located at the outer front end of the protruding head (201), and the top of the ejector pin (401) returns to the initial position located inside the axial point of the hair follicle placement groove (103) at the rear section of the needle tip of the needle tube (102). The protective sleeve (6) is sleeved on the front end of the protruding head (201), and the head of the puncture needle (1) is located inside the protective sleeve (6).

[0030] The needle hub (101) of the puncture needle is made of plastic, and the needle tube (102) is made of stainless steel. The two are integrally formed by bonding, injection molding, interference fit and other methods.

[0031] The pressing pin (4) and the pressing pin (401) are made of stainless steel, and the pressing part (402) is made of plastic. The two are integrally formed by bonding, injection molding, interference fit and other methods.

[0032] The hollow component (2) and the shell (3) are made of plastic. The protective sleeve (6) is made of plastic or silicone. The protruding head (201) and the positioning rod (202) of the hollow component (2) are both detachable. The outer diameter of the protruding head (201) is the same as the outer diameter of the top of the positioning rod (202). The outer diameter of the protruding head (201) is less than the inner diameter of the front section of the front shell by ≤0.05mm. The outer diameter of the rear section of the positioning rod (202) is less than the inner diameter of the rear section of the rear shell (301) by ≤0.05mm.

[0033] The puncture needle (1), hollow part (2), shell (3), pressure needle (4), spring (5) and protective sleeve (6) are sterilized with ethylene oxide or steam and can be used for single use.

[0034] The surface of the housing (3) is ergonomically designed and has a textured surface with anti-slip features.

[0035] The shape of the hair follicle placement groove (103) at the head of the puncture needle (1) (102) can be square, round, a combination of square and round, elliptical, triangular, trapezoidal, polygonal, V-shaped, U-shaped, star-shaped, wavy, or irregular, to adapt to different hair follicle placement needs.

[0036] The needle tube (102) of the puncture needle (1) is provided with two types of hair follicle placement slots (103): the first type is open (108), and the second type is extended (107).

[0037] The first type: open type (108), the hair follicle placement groove opens from the rear side of the sharp tip structure (105) at the top of the needle tube (102), and its interior is interconnected with the interior of the sharp tip structure (105), thus forming a continuous and through space.

[0038] The second type: extended type (107). The front end of this hair follicle placement slot is not directly connected to the sharp tip structure (105), while the rear end extends a certain length along a specific direction on the side wall of the needle tube (102). This length is designed according to the hair transplant operation requirements to adapt to different hair follicle placement scenarios.

[0039] The needle tube (102) of the puncture needle (1) is provided with two types of hair follicle placement grooves (103). The extended (107) hair follicle placement groove can be adjusted axially back and forth via the extension head (201) to determine the length of the extended hair follicle placement groove extending from the inside of the extension head.

[0040] The needle tube (102) of the puncture needle (1) has a sharp tip structure (105) at the top. The sharp tip is composed of multiple intersecting planes (106). Each plane is irregularly distributed around the tip of the needle. The overall shape resembles a rhomboid angle composed of multiple asymmetrical planes, which improves puncture efficiency and durability and reduces tissue damage.

[0041] This utility model provides a hair transplant device, which has the following advantages and can effectively solve the technical problems existing in traditional hair transplant pens:

[0042] The detachable design facilitates maintenance and replacement.

[0043] The housing (3) and hollow component (2) of this utility model adopt a detachable design. The front housing (302) and the rear housing (301) can be separated, and the protruding head (201) and the positioning rod (202) can be detachably connected. This design solves the problem that the hollow component and the protruding head of the traditional hair transplant pen are an integral design and cannot be disassembled. It facilitates quick replacement of parts, reduces surgical delays, and facilitates cleaning and disinfection, reducing the risk of postoperative infection.

[0044] The needle extension length is adjustable to adapt to different surgical needs.

[0045] This invention achieves axial front-to-back adjustment and fixation of the puncture needle (1) through the cooperation of the threaded structure (1011) and the inner threaded structure (3023) of the shell (3). Doctors can precisely control the drilling depth according to the patient's scalp condition, hair transplant area and hair follicle characteristics, avoiding the problem of excessive or shallow puncture caused by the non-adjustable needle extension length of traditional hair transplant pens, thereby improving the survival rate of hair follicles and the quality of surgery.

[0046] Unique hair follicle placement slot design, adaptable to diverse hair transplant needs

[0047] The first type (continuous through-type hair follicle placement slot): This hair follicle placement slot (103) opens from the rear side of the sharp tip structure (105) at the top of the needle tube (102), and its interior is interconnected with the interior of the sharp tip structure (105). During hair follicle placement, it can be smoothly and stably positioned with the help of this continuous space, greatly reducing the risk of jamming and bending. Doctors can accurately push hair follicles to the target position, improving the accuracy of hair follicle placement, facilitating the establishment of nutrient exchange channels between hair follicles and surrounding tissues, and improving the survival rate of hair follicles. It has significant advantages in treating large areas of baldness or completely bald areas. Doctors can clearly observe the hair follicle implantation status without visual obstruction, greatly improving the efficiency, accuracy and success rate of hair transplantation.

[0048] The second model (flexible extendable hair follicle placement slot):

[0049] The front end of this hair follicle placement slot is not directly connected to the sharp tip structure (105), while the rear end extends a certain length along the axial sidewall of the needle tube (102). This length is designed according to the needs of hair transplantation operations to adapt to different hair follicle placement scenarios. The extended hair follicle placement slot can be adjusted axially back and forth via the protruding head (201) to determine the length of the extended hair follicle placement slot extending from the inside of the protruding head. In local or single-point planting areas with mild hair loss, native hair will obstruct the doctor's view. Usually, doctors will choose to shave the hair before planting. This method not only affects the postoperative aesthetics but also exposes the planting area, increasing the risk of infection. If a hair follicle placement slot with a flexible adjustable extension length is available, the doctor can keep a certain distance between the hair follicle placement point and the hair root during local planting, avoiding obstruction of vision, achieving precise planting without shaving, and ensuring postoperative aesthetics and the safety of the planting area.

[0050] The limiting structure design allows for precise control of the puncture depth.

[0051] This invention achieves the limitation of the extension and retraction of the puncture needle (1) through the cooperation of the inner step of the front housing (302) with the first step structure (2023) of the positioning rod (202), and the cooperation of the inner step of the rear housing (301) with the second step structure (2024) of the positioning rod (202). This design solves the problem of inconsistent puncture depth caused by the lack of limiting structure in traditional hair transplant pens, ensuring that the hair follicle rooting depth is moderate and improving the survival rate.

[0052] The outer diameter of the protruding head (201) is the same as the outer diameter of the top of the positioning rod (202). The outer diameter of the protruding head (201) is less than the inner diameter of the front section of the front housing by ≤0.05mm. The outer diameter of the rear section of the positioning rod (202) is less than the inner diameter of the rear section of the rear housing (301) by ≤0.05mm.

[0053] 360-degree rotation function to adapt to diverse surgical needs

[0054] The hollow component (2) of this invention can rotate 360 ​​degrees inside the housing (3) and clamp the needle seat (101) of the puncture needle (1) through the needle seat groove (2021), thereby realizing the overall rotation of the puncture needle (1). This design solves the problem of puncture and drilling deviation caused by the non-adjustable needle angle of traditional hair transplant pens, adapts to the needs of different patients' scalp curvature, hair transplant area and hair follicle implantation direction, and improves surgical flexibility.

[0055] The sharp, multi-faceted tip design improves puncture efficiency and durability.

[0056] The sharp tip structure (105) at the top of the puncture needle (1) of this invention is composed of multiple intersecting planes (106), with each plane irregularly distributed around the tip, forming an overall shape resembling a rhomboid angle composed of multiple asymmetrical planes. This design solves the problems of insufficient strength, concentrated puncture resistance, and easy deformation and damage of the traditional hair transplant pen's single-sloping tip structure. It can evenly distribute puncture resistance, improve puncture efficiency and durability, and reduce surgical interruption time.

[0057] Protective case design enhances security

[0058] This utility model is equipped with a protective sleeve (6) for covering the front end of the protruding head (201) of the hollow part (2) to protect the head of the puncture needle (1). This design solves the risk of hand injury to medical personnel caused by the lack of a needle protective sleeve in traditional hair transplant pens, and improves the safety of operation and storage.

[0059] Ergonomic design enhances operational comfort.

[0060] The shell (3) of this utility model adopts an ergonomic design and has a textured surface with anti-slip texture, which makes it easy for doctors to hold and operate, reduces surgical fatigue, and improves operating comfort and stability.

[0061] Materials and sterilization design meet medical safety requirements.

[0062] The puncture needle (1), hollow part (2), shell (3), pressure needle (4), spring (5) and protective sleeve (6) of this utility model can be sterilized with ethylene oxide or steam and can be used for single use. They are suitable for mass production, have low cost, meet medical safety requirements, and reduce the risk of cross-infection.

[0063] The hair follicle placement slot and marking point are designed on the same side to improve operational accuracy.

[0064] In this invention, the hair follicle placement groove (103) and the marking point (2014) on the outer side of the protruding head (201) of the hollow component (2) are both located on the same side of the device's axis. This ingenious structural design greatly facilitates the doctor's operation. In hair transplant surgery, since blood stains are unavoidable during the puncture process, traditional hair transplant needles lack a similar design, making it difficult for doctors to accurately judge the needle angle. They often have to rely on experience and rough visual estimation, increasing the uncertainty and difficulty of the operation, easily leading to puncture deviations, and affecting the hair follicle implantation effect. By setting the hair follicle placement groove and the marking point on the same side, this invention allows doctors to intuitively and quickly judge the needle angle, ensuring the accuracy of puncture and implantation, and significantly improving the success rate of the surgery.

[0065] In this invention, the hair follicle placement groove is positioned on opposite sides of the device's axial direction, with the groove and the pointed tip structure (105) at a specific angle. This arrangement ensures that external force is applied effectively to the hair follicle during needle insertion, stabilizing it within the groove and preventing displacement or loss.

[0066] The position and angle of the hair follicle placement groove (103) and the sharp tip structure (105) ensure a high survival rate of hair follicles. This allows doctors to have less obstruction of their vision during surgery, clearly see the hair follicles and the puncture process, accurately control each stage of the surgery, and greatly improve the success rate and effect of hair transplantation. Attached Figure Description

[0067] Figure 1 This is a schematic diagram of the overall structure of a hair transplant device according to the present invention.

[0068] Figure 2 This is a schematic diagram of the hollow component (2) of a hair transplant device of this utility model.

[0069] Figure 3 This is a schematic diagram of the housing (3) of a hair transplant device according to the present invention.

[0070] Figure 4 This is a schematic diagram of the pressing pin (4) of the hair transplant device of this utility model.

[0071] Figure 5 This is a schematic diagram of the puncture needle (1) of the hair transplant device of this utility model.

[0072] Figure 6 This is a schematic diagram of the puncture needle (1) of the hair transplant device of this utility model.

[0073] Figure 7 This is a schematic diagram of the puncture needle (1) of the hair transplant device of this utility model.

[0074] Figure 8 This is a schematic diagram of the installation method of the puncture needle (1) and hollow part (2) of the hair transplant device of this utility model.

[0075] Figure 9 This is a schematic diagram of the installation method of the hollow part (2) and the shell (3) of the hair transplant device of this utility model.

[0076] Figure 10 This is a schematic diagram of the installation method of the hair transplant device of the present invention, including the pressure pin (4), the hollow part (2), and the shell (3).

[0077] Figure 11 This is a schematic diagram simulating the use of the hair transplant device of this utility model in the surgical puncture state.

[0078] Figure 12 This is a schematic diagram simulating the use of the hair transplant device of this utility model in the process of transplanting hair follicles.

[0079] In the picture

[0080] The components are: puncture needle (1), hollow part (2), housing (3), pressure pin (4), spring (5), and protective sleeve (6). The housing (3) includes: front housing (302), rear housing (301), front section inner diameter of the front housing (3021), rear section inner diameter of the front housing (3022), threaded structure on the inner side of the rear section of the front housing (3023), front section inner diameter of the rear housing (3011), rear section inner diameter of the rear housing (3012), hollow part protrusion (201), hollow part positioning rod (202), positioning rod needle seat groove (2021), and positioning rod first step structure (202). 3) Positioning rod second step structure (2024), protruding head conical structure (2011), protruding head outer side marked with a mark point (2014), puncture needle seat (101), puncture needle tube (102), puncture needle sharp tip structure (105), puncture needle hair follicle placement groove (103), needle seat outer side is circular and has threads (1011), pressure pin pin (401), pressure pin pressing part (402), open hair follicle groove (108), extended hair follicle groove (107), puncture needle sharp tip is composed of multiple intersecting planes (106). Example

[0081] Example 1: Assembly and Inspection of Hair Transplant Device

[0082] Hair transplant device installation method

[0083] Step 1: Install the puncture needle onto the positioning rod

[0084] The puncture needle (1) is tilted so that its tip is inserted into the needle seat groove (2021) of the positioning rod (202) until the tip of the puncture needle (1) protrudes from the front end of the protrusion head (201). This process requires ensuring that the flat structures on both sides of the needle seat (101) are aligned with the needle seat groove (2021) for subsequent operations.

[0085] Step 2: The component is inserted into the front housing.

[0086] Insert the hollow part (2) with the puncture needle (1) installed, along with other components, into the inner side of the front housing (302) from the rear end. Note that during insertion, ensure that the outer diameter of the protruding head (201) is smaller than the inner diameter (3021) of the front section of the front housing (302) so that the positioning rod (202) can pass smoothly through the internal space of the front housing (302).

[0087] Step 3: Rear housing installation

[0088] The front end of the rear housing (301) is inserted through the tail of the positioning rod (202) so that the rear housing (301) and the front housing (302) fit together. The inner diameter of the front section of the rear housing (301) is larger than the outer diameter of the middle section of the positioning rod (202), and the inner diameter of the rear section is smaller than the outer diameter of the middle section of the positioning rod (202), ensuring that the rear housing (301) can be accurately fitted into the appropriate position, preparing for the subsequent limiting function.

[0089] Step 4: Install the pressing component and spring

[0090] Install the pressing element (402) and spring (5) forward from the tail of the positioning rod (202). Sleeve the spring (5) over the ejector pin (401), and pass the ejector pin (401) from the inside of the tail of the positioning rod (202) of the hollow part (2) to the tail of the puncture needle (1) and extend to the hair follicle placement groove (103). Then fix the front end of the pressing element (402) to the tail of the positioning rod (202), while making the front end of the spring (5) abut against the tail of the needle seat (101) and the rear end abut against the front end of the pressing element (402).

[0091] Step 5: Adjusting the position of the puncture needle

[0092] By rotating the pressing component (402), the flat position of the needle seat groove (2021) of the positioning rod (202) and the flat position of the needle seat (101) are used to drive the outer thread (1011) of the needle seat (101) to match the inner thread structure (3023) of the front housing (302). When the pressing component (402) is rotated continuously, when it is rotated clockwise, the needle tube (102) will move forward relative to the protruding head (201), increasing the distance of the needle tip extension; when it is rotated counterclockwise, the needle tube (102) will retract backward, reducing the distance of the needle tip extension. At the same time, since the protruding head (201) of the hollow component (2), the positioning rod (202) and the pressing component (402) are assembled into a whole structure, rotating the protruding head (201) can also drive the puncture needle (1) to rotate as a whole, thereby adjusting the extension length of the needle tube (102).

[0093] During the adjustment of the length and position of the puncture needle (1), it is necessary to constantly ensure that the tip angle of the needle tube (102) is always on the same side of the device axis as the mark (2014) on the outer side of the protruding head (201). This is because in the subsequent hair transplant surgery, the doctor will visually judge the angle of the needle tip by observing the mark (2014) on the protruding head (201), thereby ensuring the accuracy of puncture and hair follicle implantation. After the precise adjustment of the position and angle of the puncture needle is completed, the installation of the entire hair transplant device is finished.

[0094] How to use

[0095] Preoperative preparation

[0096] 1. Select a hair transplant device in good condition and carefully check whether the puncture needle (1), hollow part (2), shell (3), pressure needle (4), spring (5) and protective sleeve (6) are damaged or deformed.

[0097] The hair transplant device undergoes strict disinfection, which can be achieved using ethylene oxide or steam sterilization to ensure that the device meets medical safety standards.

[0098] Based on the actual condition of the patient's scalp, such as thickness, hair follicle characteristics, and specific requirements of the hair transplant area, the extension length of the puncture needle (1) is precisely adjusted by rotating the pressing component (402).

[0099] hair transplant procedure

[0100] 1. Hair follicle placement

[0101] The patient assumes a suitable position, and local anesthesia is administered to the hair transplant site. The protective sheath (6) is removed, and the hair follicle is carefully placed into the hair follicle placement groove (103) at the tip of the puncture needle (1) vial (102) using professional tweezers. During placement, carefully observe the marking point (2014) on the outer side of the protruding head (201) to ensure that the hair follicle placement direction is consistent with the marking point for accurate subsequent implantation.

[0102] Simultaneous operation of puncture and hair follicle implantation

[0103] The doctor holds the casing (3) with their hand, using the textured surface to maintain a stable grip and prevent the device from slipping during the procedure. The angle of the puncture needle (1) is adjusted according to the marked point (2014) to align it with the hair transplant site. The needle is then quickly and steadily inserted into the scalp, maintaining appropriate force and speed to ensure a good perforation effect.

[0104] Once the puncture needle has penetrated the scalp to the predetermined depth, keep the device stationary. At this point, press the pressure piece (402) at the tail end. At the moment of pressing, the protruding head (201) will extend forward, while the needle tube (102) will retract backward. Under the inertial effect of this relative motion, the pin (401) inside the needle tube (102) will push the hair follicle, accurately pushing the hair follicle into the pore of the scalp.

[0105] Repeat operation

[0106] Release the pressing component (402), and the elastic force of the spring (5) will reset the hollow component (2) and the puncture needle (1), and the second step structure (2024) of the positioning rod (202) will re-contact the inner step of the rear shell (301). Following the above steps, perform multiple hair follicle implantation operations sequentially until the hair transplantation task in that area is completed. During the operation, if it is necessary to fine-tune the extension length of the puncture needle (1), the pressing component can be rotated at any time.

[0107] Unique hair follicle placement slot design, adaptable to diverse hair transplant needs

[0108] The first type (continuous through-type hair follicle placement slot): This hair follicle placement slot (103) opens from the rear side of the sharp tip structure (105) at the top of the needle tube (102), and its interior is interconnected with the interior of the sharp tip structure (105). During hair follicle placement, it can be smoothly and stably positioned with the help of this continuous space, greatly reducing the risk of jamming and bending. Doctors can accurately push hair follicles to the target position, improving the accuracy of hair follicle placement, facilitating the establishment of nutrient exchange channels between hair follicles and surrounding tissues, and improving the survival rate of hair follicles. It has significant advantages in treating large areas of baldness or completely bald areas. Doctors can clearly observe the hair follicle implantation status without visual obstruction, greatly improving the efficiency, accuracy and success rate of hair transplantation.

[0109] The second model (flexible extendable hair follicle placement slot):

[0110] The front end of this hair follicle placement slot is not directly connected to the sharp tip structure (105), while the rear end extends a certain length along the axial sidewall of the needle tube (102). This length is designed according to the needs of hair transplantation operations to adapt to different hair follicle placement scenarios. The extended hair follicle placement slot can be adjusted axially back and forth via the protruding head (201) to determine the length of the extended hair follicle placement slot extending from the inside of the protruding head. In local or single-point planting areas with mild hair loss, native hair will obstruct the doctor's view. Usually, doctors will choose to shave the hair before planting. This method not only affects the postoperative aesthetics but also exposes the planting area, increasing the risk of infection. If a hair follicle placement slot with a flexible adjustable extension length is available, the doctor can keep a certain distance between the hair follicle placement point and the hair root during local planting, avoiding obstruction of vision, achieving precise planting without shaving, and ensuring postoperative aesthetics and the safety of the planting area.

[0111] This invention has a simple structure and is easy to use. The overall structural design is closely based on the needs of clinical medicine and was developed according to the actual situation of medical personnel, so it has extremely high promotion value.

[0112] The above description of the embodiments is intended to enable those skilled in the art to understand and apply the technology of this application. Those skilled in the art can readily make various modifications to these examples and apply the general principles described herein to other embodiments without creative effort. Therefore, this application is not limited to the above embodiments, and any improvements and modifications made to this application by those skilled in the art based on the disclosure herein should be within the scope of protection of this application.

Claims

1. A hair transplant device, characterized in that, It is mainly composed of a puncture needle (1), a hollow part (2), a shell (3), a pressing pin (4), a spring (5), and a protective sleeve (6); The housing (3) is composed of a detachably connected front housing (302) and a rear housing (301), which are connected internally. The inner diameter (3021) of the front section of the front housing (302) is smaller than the inner diameter (3022) of the rear section, and a step is formed at the connection between the two. A threaded structure (3023) is provided on the inner side of the rear section. The inner diameter (3011) of the front section of the rear housing (301) is larger than the inner diameter (3012) of the rear section, and a step is also formed on the inner side. The hollow component (2) is installed inside the housing (3) and consists of an extension head (201) and a positioning rod (202). The interior is interconnected. The positioning rod (202) is provided with a needle seat groove (2021). The needle seat groove is perpendicular to the axial direction of the positioning rod (202) and penetrates the side wall of the positioning rod (202) on both sides. The outer diameter of the front section of the head is larger than the outer diameter of the top section, forming a first step structure (2023). The outer diameter of the middle section is larger than the outer diameter of the front and rear sections, forming a second step structure (2024). The head of the extension head (201) is conical (2011), and a marking point (2014) is provided on the outer side of the head. The puncture needle (1) consists of a needle seat (101) and a needle tube (102), which are interconnected on the inside. The head of the needle tube (102) is provided with a sharp tip structure (105). A hair follicle placement groove (105) is provided on the needle tube behind the sharp tip. 3) The hair follicle placement groove (103) and the head marking point (2014) of the protruding head (201) are on the same side of the device axis, and the hair follicle placement groove (103) and the needle tip structure (105) are located on opposite sides of the device axis, with a certain angle of inversion. For example, if the hair follicle placement groove (103) is on the left side of the axis, the tip of the sharp tip structure (105) is on the right side of the axis, and the tilt angle of the sharp tip structure (105) is not parallel to the direction of the hair follicle placement groove (103), and there is a specific angle; the needle seat (101) is circular on the outside and has a thread (1011), and the two sides of the axis are flat structures. The thickness of the flat structure is less than the width of the needle seat groove (2021). The puncture needle (1) is tilted, and the needle head is guided through the needle seat groove (2021) to the front end of the protruding head (201). The needle seat (101) can move axially in the needle seat groove (2021); The outer diameter of the protruding head (201) is smaller than the inner diameter of the front section of the front housing (3021). The outer diameter of the top end of the positioning rod (202) is smaller than the inner diameter of the front section of the front housing (3021). The outer diameter of the front section is larger than the inner diameter of the front section of the front housing (3021) and smaller than the inner diameter of its rear section (3022). The inner diameter of the front section of the rear housing (301) is larger than the outer diameter of the middle section of the positioning rod (202). The inner diameter of the rear section is smaller than the outer diameter of the middle section of the positioning rod (202). The inner step of the front housing (302) forms an axial extension limit on the first step structure (2023) of the head of the positioning rod (202). The inner step of the rear housing (301) forms an axial retraction limit on the second step structure (2024) of the middle section of the positioning rod (202). The pressing pin (4) consists of a pressing pin (401) and a pressing member (402). The pressing pin (401) is axially mounted on the front end of the pressing member (402) and the two are concentrically arranged. The spring (5) is sleeved on the outside of the pressing pin (401) and its front end abuts against the pressing member. The pressing pin (4) passes through the inner side of the tail of the positioning rod (202) of the hollow part (2) through the pressing pin (401) to the tail of the needle seat of the puncture needle (1), and extends from the inside of the needle tube to the hair follicle placement groove (103) at the head of the needle tube. The front end of the pressing member (402) is fixedly connected to the tail of the positioning rod (202), and the front end of the spring (5) abuts against the pressing member. The tail and rear end of the needle seat (101) abut against the front end of the pressing member (402). The natural length of the spring is greater than the distance from the tail of the needle seat (101) to the front end of the pressing member (402). When the needle seat (101) and the pressing member (402) are assembled together, the needle seat is fixed to the inner thread of the housing by the thread. The spring (5) is located in the middle of the two and is in a compressed state. Under the continuous backward elastic force of the spring (5), the second step structure (2024) of the positioning rod (202) contacts the inner step of the rear housing (301) to form a limit, so that the hollow part (2) is kept in a specific axial position. When the entire device is assembled, the head of the needle tube (102) extends axially to the front end of the protrusion head (201), and the top of the pin (401) is located at the front end of the protrusion head (201) and at the rear end of the needle tip of the needle tube (102), specifically inside the axial point of the hair follicle placement groove (103). The hollow component (2) can rotate 360 ​​degrees inside the housing (3). It clamps the needle seat (101) by engaging with the flat structures on both sides of the needle seat (101) through the needle seat groove (2021). Both are supported by the spring (5) and remain stable. The needle seat (101) engages with the threaded structure (3023) on the inner side of the housing (3) through the outer thread (1011), allowing for axial adjustment and fixation of the needle seat (101) within the housing (3). Throughout the entire forward and backward movement of the needle seat (101) within the housing (3), the spring (5) remains compressed. When the housing (3) is fixed... When the pressing component (402) is rotated, the hollow component (2) and the puncture needle (1) are rotated as a whole. When rotating clockwise, the needle seat (101) moves axially toward the front end of the housing under the threaded engagement. Due to the elastic force of the spring (5), the second step structure (2024) of the positioning rod (202) continues to contact the inner step of the rear housing (301). The axial front-back position of the hollow component (2), the protruding head (201), and the pressing component (402) relative to the housing (3) remains unchanged. Only the needle seat (101) is in the needle seat groove (2024). 21) The needle tube (102) moves axially within the inner shell and housing, thereby moving towards the front end of the protruding head (201). When rotating counterclockwise, the needle seat (101) moves backward under the threaded engagement. The spring (5) remains compressed, continuously applying a backward elastic force to the hollow part (2). The second step structure (2024) of the positioning rod (202) is always in contact with the inner step of the rear housing (301), and the needle tube (102) retracts backward. Based on the protruding head (201), the positioning rod (202), and the pressing part (402), The linkage between them can also be adjusted by rotating the extension head (201) to adjust the axial extension length of the needle tube (102). During this process, due to the elastic force of the spring (5), the second step structure (2024) of the positioning rod (202) and the inner step of the rear housing (301) are continuously in contact and limited. The axial front and back position of the hollow part (2) in the housing (3) remains unchanged. Only by pressing the pressing part (402) to overcome the elastic force of the spring (5) will the axial front and back position of the hollow part (2) and the housing (3) change. When the fixed housing (3) is pressed against the pressing member (402) at its axial front end, the hollow member (2) moves axially towards the front end of the housing, and the protruding head (201) and the ejector pin (401) move forward synchronously. During this period, the axial position of the needle seat (101) and the needle tube (102) of the puncture needle (1) relative to the housing (3) remains unchanged. As the pressing is pushed forward, the first step structure (2023) of the head of the positioning rod (202) contacts and limits the contact with the inner step of the front housing (302). When the two contact, the front end of the protruding head (201) moves to the front of the needle tip of the needle tube (102), and at the same time, the front end of the ejector pin (401) also moves to the front end of the needle tip of the needle tube (102) and extends out. The needle tip is then in the position of the protruding head (201). 01) On the inside, when the pressing part (402) is released, under the elastic force of the spring (5) moving backward, the pressing part (402), the hollow part (2), the protruding head (201) and the ejector pin (401) move backward in axial direction simultaneously. At this time, the second step structure (2024) of the positioning rod (202) contacts and limits the inner step of the rear shell (301). After the movement is completed, the needle tip of the needle tube (102) is located at the outer front end of the protruding head (201), and the top of the ejector pin (401) returns to the initial position located inside the axial point of the hair follicle placement groove (103) at the rear section of the needle tip of the needle tube (102). The protective sleeve (6) is sleeved on the front end of the protruding head (201), and the head of the puncture needle (1) is located inside the protective sleeve (6).

2. The hair transplant device according to claim 1, characterized in that, The puncture needle (1) has a needle seat (101) made of plastic and a needle tube (102) made of stainless steel. The two are integrally formed by bonding, injection molding, interference fit and other methods.

3. The hair transplant device according to claim 1, characterized in that, The pressing pin (4) and the pressing pin (401) are made of stainless steel. Made of steel, the pressing part (402) is made of plastic. The two are integrally formed by bonding, injection molding, interference fit and other methods.

4. The hair transplant device according to claim 1, characterized in that, The hollow component (2) and the housing (3) are made of plastic. The protective sleeve (6) is made of plastic or silicone. The protruding head (201) and the positioning rod (202) of the hollow component (2) are both detachable. The outer diameter of the protruding head (201) is the same as the outer diameter of the top of the positioning rod (202). The outer diameter of the protruding head (201) is less than the inner diameter of the front section of the front housing by ≤0.05mm. The outer diameter of the rear section of the positioning rod (202) is less than the inner diameter of the rear section of the rear housing (301) by ≤0.05mm. The stability of the device's front and rear extension is ensured by the precise gap.

5. The hair transplant device according to claim 1, characterized in that, The puncture needle (1), hollow part (2), shell (3), pressure needle (4), spring (5) and protective sleeve (6) are sterilized with ethylene oxide or steam and can be used for single use.

6. The hair transplant device according to claim 1, characterized in that, The surface of the housing (3) is ergonomically designed and has a textured surface with anti-slip features.

7. The hair transplant device according to claim 1, characterized in that, The shape of the hair follicle placement groove (103) at the head of the puncture needle (1) (102) can be square, round, a combination of square and round, elliptical, triangular, trapezoidal, polygonal, V-shaped, U-shaped, star-shaped, wavy, or irregular, to adapt to different hair follicle placement needs.

8. The hair transplant device according to claim 1, characterized in that, The needle tube (1) of the puncture needle (1) is provided with two types of hair follicle placement grooves (103): the first type is open (108) and the second type is extended (107). The first type: open (108) The hair follicle placement groove opens from the rear side of the sharp tip structure (105) at the top of the needle tube (102), and its interior is interconnected with the interior of the sharp tip structure (105), thereby forming a continuous and through space.

9. The hair transplant device according to claim 8, characterized in that, The second type: extended type (107). The front end of this hair follicle placement slot is not directly connected to the sharp tip structure (105), while the rear end extends a certain length on the axial side wall of the needle tube (102). This length is designed according to the hair transplant operation requirements to adapt to different hair follicle placement scenarios.

10. The hair transplant device according to claim 1, characterized in that, The needle extension (107) hair follicle placement groove of the puncture needle (1) can be adjusted axially back and forth via the extension head (201) to determine the length of the extension hair follicle placement groove extending from the inside of the extension head.

11. The hair transplant device according to claim 1, characterized in that, The needle tube (102) of the puncture needle (1) has a sharp tip structure (105) at the top. The sharp tip is composed of multiple intersecting planes (106). Each plane is irregularly distributed around the tip of the needle. The overall shape resembles a rhomboid angle composed of multiple asymmetrical planes, which improves puncture efficiency and durability and reduces tissue damage.

Images