Hair follicle transplantation instrument

Abstract

The utility model discloses a hair follicle transplantation instrument, which comprises a pen shell, the first motor is connected into the pen shell, the first motor is in driving connection with a connector, a connecting groove is formed in the end, away from the first motor, of the connector, and a through hole is formed in the center of the bottom of the connecting groove; one end of the pen point is clamped in the connecting groove, a connecting piece is connected between the connecting head and the pen point, and the other end of the pen point extends out of the end portion of the pen shell. According to the utility model, discarded parts can be reduced during maintenance, and more reusable structures are reserved, so that the use cost is reduced, the resource waste is reduced, and the service life of the pen is prolonged. And the method can be better popularized and applied.

Description

Technical Field

[0001] The utility model relates to a surgical instrument, in particular to a hair follicle transplantation instrument. Background Art

[0002] The hair transplant pen, also known as the hair follicle transplant instrument, is a surgical device used for hair follicle extraction and implantation in hair transplant surgery. In the hair transplant pen, the brushless motor drives the pen head to rotate and drill into the skin. The linear stepper motor in the hair transplant pen performs linear motion, which drives the clip in the pen head to clamp off the hair follicles through the structural transmission, and stores the hair follicles in the hollow needle tube of the pen head. Then, the hollow needle tube of the pen head enters the skin of the donor area, and the linear motion of the linear stepper motor is again transmitted through the structure to drive the push rod to implant the hair follicles in the skin of the donor area.

[0003] It can be seen that the hair transplant pen will form wounds on the human body during operation, and is generally recycled as a disposable device after use, resulting in high costs for device consumables and a large waste of resources. Therefore, there is an urgent need for a hair transplant pen with lower usage costs and greater environmental protection. Utility Model Content

[0004] The utility model aims to provide a hair follicle transplantation instrument to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] The solution of the utility model to solve the technical problem is:

[0006] A hair follicle transplantation instrument comprises: a pen case; a first motor connected to the pen case, the first motor drivingly connected to a connecting head, an end of the connecting head away from the first motor being provided with a connecting groove, a through hole being provided at the center of the groove bottom of the connecting groove; a pen tip, one end of which is clamped in the connecting groove, a connecting piece being connected between the connecting head and the pen tip, and the other end of the pen tip extending out of the end of the pen case.

[0007] This technical solution has at least the following beneficial effects: when working, the first motor can drive the connecting head to rotate. Since the pen tip is connected to the connecting head, the pen tip will also rotate with the connecting head. After use, since the pen tip is the main contact part with the human body, the pen tip needs to be removed from the pen shell for recycling. Specifically, the connecting piece is removed from between the connecting head and the pen tip, and then the pen tip is removed from the connecting groove. At this time, the new pen tip can be clamped in the connecting groove to achieve rapid positioning of the pen tip and the connecting head, and then the connecting piece is used to further tighten the connecting head and the pen tip to achieve disassembly and maintenance of the pen tip. In this way, the discarded part can be reduced during maintenance, and more reusable structures can be retained, thereby reducing the cost of use, reducing resource waste, and better promoting application.

[0008] As a further improvement of the above technical solution, the inner side wall of the connecting groove extends obliquely from the groove bottom to the groove opening in a direction away from the center of the connecting groove, and the shape of the end of the pen tip matches the shape of the connecting groove. The inner side wall of the connecting groove is arranged obliquely, so that a conical space with a larger groove opening and a smaller groove bottom is formed inside the connecting groove. At this time, the end of the pen tip and the connecting groove are connected to each other, which can improve the tightness of the connection between the two, better ensure that the connecting head keeps the coaxiality of the rotation of the pen tip and the rotation of the connecting head when driving the pen tip to rotate, and improve the stability of the pen tip during operation and use, thereby ensuring that the pen tip can be disassembled and assembled with the connecting head, and can also effectively ensure the stability of the pen tip.

[0009] As a further improvement of the above technical solution, the inner side wall of the connecting groove is formed with a pressing plane protruding toward the center of the connecting groove, the pressing plane is closely attached to the outer side wall of the pen tip, and the connecting piece is inserted into the pen tip from the position of the outer side of the connecting tip facing the pressing plane and connected to the pen tip. When the end of the pen tip is clamped in the connecting groove, the pressing plane of the inner side wall of the connecting groove and the outer side wall of the pen tip are closely attached to each other to form a stable pressing plane. At this time, the connecting piece is inserted into the pen tip from the position facing the pressing plane. The connecting piece presses the two together at this position, which can improve the stability when the two are pressed against each other, and the pressing plane can also be used to limit the relative rotation of the two.

[0010] As a further improvement of the above technical solution, a card block is provided on the inner side wall of the connecting groove, and a card slot is provided on the outer side of the pen tip, and the card block is connected in cooperation with the card slot. When the end of the pen tip is connected to the connecting groove, the card block and the card slot are opposite to each other, and as the end of the pen tip is inserted into the connecting groove, the card block and the card slot are connected in cooperation with each other to achieve a quick connection between the pen tip and the connecting groove, and when the connecting head drives the pen tip to rotate, the card block and the card slot can be used to limit the relative rotation of the two, which is beneficial to improve the structural stability of the connecting piece.

[0011] As a further improvement of the above technical solution, a motor screw is connected inside the pen housing, and the motor screw has a movable end that can reciprocate along the axial direction of the pen housing, and a coupling is connected to the movable end, and the coupling is detachably connected to a push rod, and one end of the push rod passes through the through hole and protrudes from the pen head. The pen housing is equipped with an electric screw. When in use, the push rod is driven by the movable end of the electric screw to push out the hair follicles in the pen head. After completion, the push rod is driven by the movable end of the electric screw to return and reset. In addition, the push rod and the coupling are detachable structures, and the push rod can be disassembled and maintained according to the needs of use, further reducing the overall maintenance cost.

[0012] As a further improvement of the above technical solution, a channel is provided in the coupling along the axial direction of the pen housing, a mounting hole connected to the channel is provided on the outer side of the coupling, the push rod is inserted into the channel, a top screw is installed in the mounting hole, and the push rod is pressed against the inner side of the channel by the top screw. When the push rod and the coupling are connected to each other, the end of the push rod is inserted into the channel, and the position of the push rod in the channel can be flexibly adjusted according to the use needs, so as to adjust the protruding length of the push rod during use. After the adjustment is completed, the top screw is locked, and the push rod is pressed against the inner side of the channel by the end of the top screw, so as to fix the push rod in the coupling. When the push rod and the coupling need to be separated from each other, it is only necessary to move the top screw in the direction away from the channel. In this way, the push rod and the coupling can be conveniently and stably connected detachably, and the position of the push rod can also be adjusted according to the use needs, so that the use is more flexible.

[0013] As a further improvement of the above technical solution, the movable end is a hollow structure, the end of the push rod passes through the inside of the movable end and protrudes from the side of the motor screw away from the pen head, and a micro switch is provided in the pen housing opposite to the end of the push rod protruding from the motor screw, and one end of the push rod can press against or move away from the micro switch. The end of the push rod directly passes through the hollow movable end, and when the electric screw drives the push rod to return to the reset position, the end of the push rod abuts against the micro switch, which can trigger the micro switch, and the micro switch is connected to the electrical components of the peripheral device, such as a counter, a display, etc., so that it is convenient to know that the push rod is reset to the position, so as to better judge the working status of the hair transplant pen and improve the convenience of operation.

[0014] As a further improvement of the above technical solution, a buzzer is connected inside the pen housing, and the micro switch is electrically connected to the buzzer. When the push rod is reset to its position, the micro switch is triggered, and the micro switch conducts the circuit connected to the buzzer, so that the buzzer starts to emit a sound, from which the user can easily judge the working status of the hair transplant pen, thereby improving the convenience of operation.

[0015] As a further improvement of the above technical solution, the utility model further includes an electric control box, on which an electric control switch is provided, and the electric control switch is electrically connected to the first motor. The electric control box is separated from the pen case, which can reduce the weight of the hair transplant pen, especially the weight of the pen case away from the pen head. When operating, the user can operate the electric control box and the pen case with his left and right hands respectively, and improve work efficiency and stability through the coordination of the left and right hands.

[0016] As a further improvement of the above technical solution, a bearing is connected between the inner side of the pen shell and the outer side of the pen head. The pen head is connected to the inner side of the pen shell through the bearing, which can effectively reduce the jumping of the pen head during use and further improve the stability of the pen head when it rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following is a brief description of the drawings required for the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present utility model, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall internal structure of the utility model.

[0019] Figure 2 It is a stereoscopic diagram of a connector of the present utility model.

[0020] Figure 3 It is a three-dimensional diagram of a pen tip of the utility model.

[0021] Figure 4 It is a stereoscopic diagram of the coupling of the utility model.

[0022] Figure 5 It is a three-dimensional diagram of the electric control box of the utility model.

[0023] In the accompanying drawings: 100-pen housing, 110-bearing, 200-first motor, 210-connecting head, 211-connecting groove, 212-through hole, 213-pressing plane, 214-block, 300-pen head, 310-slot, 410-motor screw, 420-coupling, 421-channel, 422-mounting hole, 430-push rod, 500-electric control box, 510-electric control switch. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are 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 on the present invention.

[0026] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] Reference Figure 1 A hair follicle transplantation instrument comprises a pen housing 100, a first motor 200 and a pen tip 300, wherein the first motor 200 is connected to the pen housing 100, and the first motor 200 is driven to be connected to a connector 210, and an end of the connector 210 away from the first motor 200 is provided with a connecting groove 211, and a through hole 212 is provided at the center of the bottom of the connecting groove 211. In practical applications, the first motor 200 is a hollow motor to make room for a structural member to pass through along the axial direction of the pen housing 100; one end of the pen tip 300 is clamped in the connecting groove 211, and a connector is connected between the connector 210 and the pen tip 300, and the other end of the pen tip 300 extends out of the end of the pen housing 100. In practical applications, the connector can be a structural member such as a screw or a bolt.

[0029] As can be seen from the above, when working, the first motor 200 can drive the connecting head 210 to rotate. Since the pen head 300 is connected to the connecting head 210, the pen head 300 will also rotate with the connecting head 210. After use, since the pen head 300 is the main contact part with the human body, the pen head 300 needs to be removed from the pen shell 100 for recycling. Specifically, the connecting piece is removed from between the connecting head 210 and the pen head 300, and then the pen head 300 is removed from the connecting groove 211. At this time, a new pen head 300 can be clamped in the connecting groove 211 to achieve rapid positioning of the pen head 300 and the connecting head 210, and then the connecting piece is used to further tighten the connecting head 210 and the pen head 300 to achieve disassembly and maintenance of the pen head 300. In this way, the discarded part can be reduced during maintenance, and more reusable structures are retained, thereby reducing the use cost, reducing resource waste, and better promoting application.

[0030] The connecting groove 211 may be a groove body extending straightly. In order to improve the tightness of the connection between the pen tip 300 and the connecting groove 211, in this embodiment, the inner side wall of the connecting groove 211 extends obliquely from the groove bottom to the groove opening in a direction away from the center of the connecting groove 211, and the shape of the end of the pen tip 300 is adapted to the shape of the connecting groove 211. The inner side wall of the connecting groove 211 is arranged obliquely, so that a conical space with a larger groove opening and a smaller groove bottom is formed inside the connecting groove 211. At this time, the end of the pen tip 300 and the connecting groove 211 are mutually matched and connected, which can improve the tightness of the connection between the two, better ensure that the connecting head 210 keeps the coaxiality of the rotation of the pen tip 300 and the rotation of the connecting head 210 when driving the pen tip 300 to rotate, and improve the stability of the pen tip 300 when it is operated and used, thereby ensuring that the pen tip 300 can be disassembled and assembled with the connecting head 210, and the working stability of the pen tip 300 can be effectively ensured.

[0031] In the above embodiment, the inner side wall of the connecting groove 211 is a conical surface extending in an annular shape. When the connecting member passes through the connecting head 210 and is connected to the pen tip 300, it is easy for the connecting member to offset the pressure between the connecting head 210 and the connecting groove 211. In order to improve the stability of the force applied when the two are connected to each other, as shown in FIG. Figure 2 As shown, in this embodiment, the inner wall of the connecting groove 211 is formed with a pressing plane 213 protruding toward the center of the connecting groove 211, and the pressing plane 213 is tightly attached to the outer wall of the pen tip 300. The connecting member is inserted into the pen tip 300 from the outer side of the connecting head 210 facing the pressing plane 213 and connected to the pen tip 300. In actual application, pressing planes 213 can be protruded on both sides of the groove on the inner side of the connecting groove 211. At this time, two structures that can respectively cooperate with the two pressing planes 213 are also formed on the outer side of the pen tip 300. When the end of the pen tip 300 is clamped in the connecting groove 211, the pressing plane 213 of the inner wall of the connecting groove 211 and the outer wall of the pen tip 300 are tightly attached to each other to form a stable pressing plane 213. At this time, the connecting piece is inserted into the pen tip 300 from a position opposite to the pressing plane 213. The connecting piece presses the two together at this position, which can improve the stability of the two when they are pressed against each other, and the pressing plane 213 can also be used to limit the relative rotation of the two.

[0032] There are many structural forms in which the pen tip 300 is clamped in the connecting groove 211, such as Figure 3As shown, in this embodiment, a clamping block 214 is provided on the inner side wall of the connecting groove 211, and a clamping groove 310 is provided on the outer side of the pen head 300, and the clamping block 214 is connected in cooperation with the clamping groove 310. When the end of the pen head 300 is connected to the connecting groove 211, the clamping block 214 and the clamping groove 310 are opposite to each other, and as the end of the pen head 300 is inserted into the connecting groove 211, the clamping block 214 and the clamping groove 310 are connected in cooperation with each other to realize the quick clamping connection between the pen head 300 and the connecting groove 211, and when the connecting head 210 drives the pen head 300 to rotate, the relative rotation of the two can be limited by the cooperation between the clamping block 214 and the clamping groove 310, which is conducive to improving the structural stability of the connecting member. In actual applications, there can be multiple blocks 214 on the inner wall of the connecting groove 211, for example, four blocks 214 are evenly arranged on the inner side of the connecting groove 211. Similarly, there are four slots 310 on the outer side of the pen tip 300. The four slots 310 cooperate with the four blocks 214 respectively, so as to further improve the stability of the pen tip 300 and the connecting groove 211 when they are connected to each other.

[0033] In the hair transplant pen, there is a structure that can drive the push rod 430 to reciprocate. Specifically, the pen housing 100 is connected with a motor screw 410, and the motor screw 410 has a movable end that can reciprocate along the axial direction of the pen housing 100. The movable end is connected with a coupling 420, and the coupling 420 is detachably connected with a push rod 430. One end of the push rod 430 passes through the through hole 212 and protrudes from the pen head 300. The pen housing 100 is equipped with an electric screw. When in use, the push rod 430 is driven by the movable end of the electric screw to push out the hair follicles in the pen head 300. After completion, the push rod 430 is driven by the movable end of the electric screw to return and reset. In addition, the push rod 430 and the coupling 420 are detachable structures, and the push rod 430 can be disassembled and maintained according to the use needs, further reducing the overall maintenance cost.

[0034] As a specific structure of the push rod 430 and the coupling 420 being detachably connected, in this embodiment, as Figure 4As shown, a channel 421 is provided in the coupling 420 along the axial direction of the pen housing 100, and a mounting hole 422 connected to the channel 421 is provided on the outer side of the coupling 420, and the push rod 430 penetrates into the channel 421, and a top screw is installed in the mounting hole 422, and the push rod 430 is pressed against the inner side of the channel 421 by the top screw. When the push rod 430 and the coupling 420 are connected to each other, the end of the push rod 430 is inserted into the channel 421, and the position of the push rod 430 in the channel 421 can be flexibly adjusted according to the needs of use, thereby adjusting the protruding length of the push rod 430 during use. After the adjustment is completed, the top screw is locked, and the end of the top screw is used to press the push rod 430 against the inner side of the channel 421 to fix the push rod 430 in the coupling 420. When the push rod 430 and the coupling 420 need to be separated from each other, it is only necessary to move the top screw in the direction away from the channel 421. In this way, the push rod 430 and the coupling 420 can be detachably connected conveniently and firmly, and the position of the push rod 430 can also be adjusted according to the needs of use, which is more flexible to use.

[0035] In order to improve the accuracy of judging the working status, in this embodiment, the movable end is a hollow structure, the end of the push rod 430 passes through the inside of the movable end and protrudes from the side of the motor screw 410 away from the pen head 300, and a micro switch is provided in the pen housing 100 at one end facing the push rod 430 and protruding from the motor screw 410, and one end of the push rod 430 can press against or move away from the micro switch. The end of the push rod 430 directly passes through the hollow movable end, and when the electric screw drives the push rod 430 to return to the reset position, the end of the push rod 430 abuts against the micro switch, which can trigger the micro switch, and the micro switch is connected to the electrical components of the peripheral device, such as a counter, a display, etc., so that it is convenient to know that the push rod 430 is reset to the position, thereby better judging the working status of the hair transplant pen and improving the convenience of operation.

[0036] Furthermore, a buzzer is connected inside the pen housing 100, and the micro switch is electrically connected to the buzzer. When the push rod 430 is reset to its position, the micro switch is triggered, and the micro switch conducts the circuit connected to the buzzer, so that the buzzer starts to emit a sound, and from this point on, the user can easily judge the working status of the hair transplant pen, thereby improving the convenience of operation.

[0037] In the above embodiment, the control element can be directly installed at the end of the pen housing 100 away from the pen head 300, while in this embodiment, the control part is separated from the pen housing 100. Specifically, the utility model further includes an electric control box 500, such as Figure 5As shown, the electric control box 500 is provided with an electric control switch 510, and the electric control switch 510 is electrically connected to the first motor 200. The electric control box 500 and the pen housing 100 are separated from each other, which can reduce the weight of the hair transplant pen, especially the weight of the end of the pen housing 100 away from the pen head 300. When operating, the user can operate the electric control box 500 and the pen housing 100 with the left and right hands respectively, and improve the work efficiency and stability through the coordination of the left and right hands. In actual applications, the electric control switch 510 and other electrical components in the electric control box 500 can be connected to the first motor 200 and the motor screw 410 in the pen housing 100 by means of wires, or a wireless communication module can be added to directly connect the electric control switch 510 in the electric control box 500 with the first motor 200 and the motor screw 410 by wireless control.

[0038] In the above embodiment, the pen tip 300 can be directly connected to the connecting head 210, and in order to further improve the coaxiality between the pen tip 300 and the connecting head 210 during rotation, in this embodiment, a bearing 110 is connected between the inner side of the pen housing 100 and the outer side of the pen tip 300. The pen tip 300 is connected to the inner side of the pen housing 100 through the bearing 110, which can effectively reduce the jumping of the pen tip 300 during use and further improve the stability of the pen tip 300 during rotation. In practical applications, there can be only one bearing 110, or two bearings can be provided along the axial direction of the pen housing 100, and in order to facilitate the installation of the bearing 110, an annular groove can be provided on the inner side of the pen housing 100, and the outer ring of the bearing 110 can be installed in the annular groove for positioning.

[0039] In order to facilitate the understanding of the hair transplant pen, the instructions for the hair transplant pen are also provided here. When the hair transplant pen is used, it involves the mutual cooperation of multiple internal structures. The following is a brief description of the coordination action process:

[0040] Step 1: The end of the pen head 300 has a hollow needle tube, and the first motor 200 is started to rotate, and the pen head 300 is driven to rotate through the connecting head 210, so as to achieve the effect of rotating the pen head 300. A limit spring is arranged inside the pen head 300, and as the pen head 300 rotates, the limit spring is elastically deformed, and the hair follicle clip connected to the limit spring is in an open state, so that the hollow needle tube is drilled into the scalp.

[0041] Step 2: The electric screw drives the backward linear motion, and the push rod 430 is connected through the action of the coupling 420 to make it move backward linearly. The small boss of the push rod 430 pulls the small bearing 110 connector baffle to resist the elastic deformation of the limit spring, and drives the small bearing 110 connector to move backward, so that the follicle clamp connector drives the follicle clamp to make a small-angle circular motion, so that the two follicle clamps are clamped together to achieve the effect of clamping off the hair follicles.

[0042] Step 3, first repeat step 1 to move the hollow needle tube into the scalp. Next, start the motor screw 410 to push the push rod 430 forward through the coupling 420, and release the elastic potential energy of the limit spring, so that the push rod 430 moves forward in the hollow needle tube, so that the hair follicles can be pushed out, completing the planting process.

[0043] The preferred implementation modes of the present invention are specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A hair follicle transplantation instrument, characterized in that: include: Pen case (100); A first motor (200) is connected to the pen housing (100); the first motor (200) is driven to be connected to a connector (210); an end of the connector (210) away from the first motor (200) is provided with a connecting groove (211); a through hole (212) is provided at the center of the bottom of the connecting groove (211); The pen tip (300) has one end clamped in the connecting groove (211), a connecting piece is connected between the connecting head (210) and the pen tip (300), the other end of the pen tip (300) extends out of the end of the pen housing (100), the inner side wall of the connecting groove (211) extends obliquely from the groove bottom to the groove opening in a direction away from the center of the connecting groove (211), and the shape of the end of the pen tip (300) is adapted to the shape of the connecting groove (211).

2. The hair follicle transplantation instrument according to claim 1, characterized in that: The inner side wall of the connecting groove (211) is formed with a pressing plane (213) protruding toward the center of the connecting groove (211), the pressing plane (213) is closely attached to the outer side wall of the pen tip (300), and the connecting piece is inserted from the outer side of the connecting head (210) directly facing the pressing plane (213) and connected to the inside of the pen tip (300).

3. The hair follicle transplantation instrument according to claim 1, characterized in that: The inner side wall of the connecting groove (211) is provided with a clamping block (214), the outer side of the pen head (300) is provided with a clamping groove (310), and the clamping block (214) is matched and connected in the clamping groove (310).

4. The hair follicle transplantation instrument according to claim 1, characterized in that: A motor screw (410) is connected inside the pen housing (100), and the motor screw (410) has a movable end that can reciprocate along the axial direction of the pen housing (100), and a coupling (420) is connected to the movable end, and the coupling (420) is detachably connected to a push rod (430), and one end of the push rod (430) passes through the through hole (212) and protrudes from the pen head (300).

5. The hair follicle transplantation instrument according to claim 4, characterized in that: A channel (421) is arranged inside the coupling (420) along the axial direction of the pen housing (100); a mounting hole (422) connected to the channel (421) is arranged on the outer side of the coupling (420); the push rod (430) penetrates into the channel (421); a top screw is arranged in the mounting hole (422); and the push rod (430) is pressed against the inner side of the channel (421) by the top screw.

6. The hair follicle transplantation instrument according to claim 5, characterized in that: The movable end is a hollow structure, the end of the push rod (430) passes through the interior of the movable end and protrudes from the side of the motor screw (410) away from the pen head (300), and a micro switch is provided in the pen housing (100) at one end of the push rod (430) protruding from the motor screw (410), and one end of the push rod (430) can press against or move away from the micro switch.

7. The hair follicle transplantation instrument according to claim 6, characterized in that: A buzzer is connected inside the pen housing (100), and the micro switch is electrically connected to the buzzer.

8. The hair follicle transplantation instrument according to claim 1, characterized in that: It also includes an electric control box (500), on which an electric control switch (510) is arranged, and the electric control switch (510) is electrically connected to the first motor (200).

9. The hair follicle transplantation instrument according to claim 1, characterized in that: A bearing (110) is connected between the inner side of the pen housing (100) and the outer side of the pen head (300).

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