Hair extraction and implantation apparatus and hair extraction and implantation method

Abstract

A hair extraction and implantation apparatus and a hair extraction and implantation method. The hair extraction and implantation apparatus comprises a main unit (1), a hair extractor (2), and a hair implanter (3). The main unit (1) is used for controlling the hair extractor (2) and the hair implanter (3). The main unit (1) comprises a negative pressure system. The negative pressure system is used for providing a negative pressure for the hair extractor (2) and the hair implanter (3). The hair extractor (2) is used for achieving hair extraction and punching, and utilizes the negative pressure to achieve suction of waste liquid and waste. The hair implanter (3) is used for achieving hair implantation, and utilizes the negative pressure to achieve suction of hair. The hair implanter (3) comprises a hair implantation needle (36) and an ejector pin (35). The hair implantation needle (36) is used for placing the hair. The ejector pin (35) is used for pushing the hair out of the hair implantation needle (36). The main unit (1) is further used for counting the number of times of pushing with the ejector pin (35).

Description

Hair transplant device and hair transplant method CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 202311753525.8 filed on December 19, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to a medical device, and more particularly to a hair transplantation device and a hair transplantation method. Background Art

[0003] Microneedle hair removal refers to the use of a hollow microneedle (punching needle) to aim at the root of the hair and cut into the hair follicles, and then lift the hair follicles and place them in a special collection box. Microneedle hair transplantation refers to the use of microneedles to punch holes in the scalp, and after punching, the hair follicles are placed into the injection microneedles, and the injection microneedles are used to place the hair follicles into the holes to complete the hair transplantation. In the related technology, hair removal, punching, hair transplantation and counting mainly rely on manual operation by the doctor. Therefore, in the process of hair removal and hair transplantation, a doctor and four nurses need to cooperate with each other to complete the operation, and the transplantation efficiency is low. On the other hand, since the aperture of the needles used for hair removal and punching is exactly the same, the hair follicles do not fit tightly after entering the holes, and there is a high probability that the hair follicles will not survive. Summary of the Invention

[0004] The present disclosure provides a hair transplantation device and a hair transplantation method to at least improve the transplantation efficiency and / or solve the problem of hair follicle survival rate.

[0005] In a first aspect, the present disclosure provides a hair removal and transplantation device, comprising a main unit, a hair remover, and a hair transplanter; the main unit is used to control the hair remover and the hair transplanter; the main unit includes a negative pressure system; the negative pressure system is used to provide negative pressure for the hair remover and the hair transplanter. The hair remover is used to extract and punch hair, and uses negative pressure to absorb waste liquid and waste; the hair transplanter is used to transplant hair and uses negative pressure to absorb hair; the hair transplanter includes a hair transplant needle and a thimble. The hair transplant needle is used to place hair; the thimble is used to push hair out of the hair transplant needle. The main unit is also used to count the number of times the thimble is pushed.

[0006] Secondly, to solve the problem of hair survival rate during hair transplantation, the present disclosure provides a hair transplantation method, which uses the hair transplantation device as described above. The hair removal punch includes a needle head, and the diameter of the needle head of the hair removal punch used for punching is smaller than the diameter of the needle head of the hair removal punch used for hair removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG1 is a schematic diagram of a hair transplant device from a first perspective according to some embodiments of the present disclosure;

[0008] FIG2 is a schematic diagram of a hair transplant device from a second perspective according to some embodiments of the present disclosure;

[0009] FIG3 is a schematic diagram of a hair removal device of a hair removal and transplantation device according to some embodiments of the present disclosure;

[0010] FIG4 is a schematic diagram of a hair removal punch needle of a hair removal and transplantation device according to some embodiments of the present disclosure;

[0011] FIG5 is a partial enlarged view of point A in FIG4 ;

[0012] FIG6 is a schematic diagram of a hair transplanter of a hair transplant device according to some embodiments of the present disclosure;

[0013] FIG7 is a schematic diagram of a negative pressure system of a hair transplant device according to some embodiments of the present disclosure; and

[0014] FIG8 is a schematic diagram of electrical connections of a control device of a hair transplant device according to some embodiments of the present disclosure.

[0015] The corresponding relationship between the reference numerals and component names in Figures 1-8 is as follows: 1. Main unit; 11. Control panel; 2. Hair remover; 3. Hair implanter; 41. Vacuum pump; 42. Air distributor; 43. Pressure gauge; 44. Solenoid pinch valve; 45. Three-way solenoid valve; 46. Filter plate; 47. Gas cylinder; 51. Control device; 52. Foot switch; 61. Air switch; 62. Power shunt board; 21. Tail cover; 22. Motor housing; 23. Connecting cover; 24. Needle sleeve housing; 25. Third connecting vessel; 26. Motor; 261. Motor shaft; 262, coupling; 27, hair removal punch needle; 271, needle head; 2711, cutting part; 2712, expansion part; 2713, limiting part; 272, needle body; 273, power assist sleeve; 2731, raised part; 2732, annular groove; 2733, coaxial part; 28, needle sleeve; 281, connecting sleeve; 282, coaxial sleeve; 29, bearing; 31, tail shell; 311, first communicating vessel; 32, shell body; 321, first sealed chamber; 322, hollow chamber; 323, spring; 324, ejector seat; 3241, pin hole; 33, negative pressure shell; 331, second sealed chamber; 332, isolation plug; 333, second communicating vessel; 34, head shell; 35, ejector; 36, hair transplant needle. DETAILED DESCRIPTION

[0016] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present disclosure more clearly understood, the present disclosure is further described in detail below with reference to the accompanying drawings and embodiments.

[0017] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly or indirectly attached to the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The "connection" is not limited to fixed connection or movable connection. The specific connection method should be determined based on the specific technical problem to be solved.

[0018] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure 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 should not be understood as a limitation on the present disclosure.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the present disclosure, "plurality" means two or more, unless otherwise specifically defined.

[0020] According to some embodiments of the present disclosure, a hair removal and transplantation device is provided, comprising a main unit 1, a hair removal device 2, and a hair transplantation device 3. The main unit 1 is used to control the hair removal device 2 and the hair transplantation device 3, and the main unit 1 includes a power supply for driving the hair removal device 2 to complete hair extraction. A negative pressure system is provided in the main unit 1, and the negative pressure system provides negative pressure for the hair removal device 2 and the hair transplantation device 3. Negative pressure is used to complete the absorption of waste and waste liquid during hair removal and punching, and the absorption of hair and waste liquid and waste during hair transplantation; negative pressure can also be used to complete the hair transplantation operation of the hair transplantation device 3.

[0021] The hair remover 2 is used to extract and punch hair, and uses negative pressure to absorb waste liquid and waste; the hair transplanter 3 is used to transplant hair, and uses negative pressure to absorb hair; the hair transplanter 3 includes a hair transplant needle 36 and a thimble 35; the hair transplant needle 36 is used to place hair; the thimble 35 is used to push hair out of the hair transplant needle 36; the host 1 is also used to count the number of times the thimble 35 is pushed.

[0022] With the hair transplantation device according to some embodiments of the present disclosure, a hole is made in the scalp using the hair removal device 2 before transplantation. Negative pressure is then used to draw the hair into the hair transplantation needle 36. The hair transplantation needle 36 is then inserted into the hole, and the hair is pushed from the hair transplantation needle 36 into the hole using the ejector pin 35, thereby completing the hair transplantation. The host device 1 can determine the number of implanted hair follicles by recording the number of times the ejector pin 35 is pushed. This significantly reduces the workload of medical staff and improves their work efficiency.

[0023] In some embodiments, the hair transplanter 3 further includes a first housing and a push-pin mechanism. The push-pin mechanism includes a piston and a reciprocating mechanism. A push-pin 35 is connected to the piston. The reciprocating mechanism pushes the piston to reciprocate, thereby driving the push-pin 35 to push and retract.

[0024] The reciprocating mechanism includes a first sealed chamber 321 provided in the first shell and a spring 323 provided in the first sealed chamber 321; one end of the spring 323 abuts the first shell, and the other end abuts the piston; the first sealed chamber 321 is communicated with the first communicating vessel 311; the first communicating vessel 311 is communicated with the negative pressure system; the air pressure in the first sealed chamber 321 can be reduced by the negative pressure system, so that the piston squeezes the spring 323, and the piston drives the spring 323 to retract; after the negative pressure system stops working, the spring 323 resets and pushes the ejector 35 forward, completing the pushing of the ejector 35.

[0025] The piston is provided with a hollow cavity 322 extending therethrough and an ejector seat 324 for mounting an ejector pin 35. The ejector pin 35 is mounted on the ejector seat 324, which is threadedly engaged with the hollow cavity 322. To prevent the ejector seat 324 from separating from the piston due to low air pressure in the first sealed cavity 321, a pin hole 3241 is provided on the piston and the ejector seat 324. The engagement of a pin with the pin hole 3241 secures the ejector seat 324 to the piston.

[0026] The first housing further includes a second sealed cavity 331. The hair implant needle 36 is in communication with the second sealed cavity 331. The second sealed cavity 331 is in communication with a second communicating vessel 333. The second communicating vessel 333 is in communication with a negative pressure system.

[0027] In some embodiments, the first housing of the hair transplanter 3 may further include a tail housing 31, a body 32, a negative pressure housing 33, and a head housing 34; the tail housing 31, body 32, negative pressure housing 33, and head housing 34 are sequentially connected. In some embodiments, the tail housing 31, body 32, negative pressure housing 33, and head housing 34 are sequentially connected using threads, and sealing rings may be provided at the connections between the tail housing 31, body 32, negative pressure housing 33, and head housing 34. A first connecting member 311 is provided on the tail housing 31 and threadedly connected thereto. A spring 323 cavity is provided within the tail housing 31; one end of the spring 323 is disposed within the spring 323 cavity. A piston is disposed within the body 32 and is also provided with a sealing ring, which seals the first sealed cavity 321. A second sealed cavity 331 is provided within the negative pressure housing 33, and a second connecting member 333 is provided on the negative pressure housing 33, communicating with the second sealed cavity 331. An isolation plug 332 is provided between the second sealed cavity 331 and the hollow cavity 322. The isolation plug 332 is threadedly connected to the negative pressure shell 33. The isolation plug 332 isolates the hollow cavity 322 from the second sealed cavity 331. A hole is provided in the center of the isolation plug 332 for the ejector pin 35 to penetrate. A hair transplant needle 36 is provided on the head shell 34. The ejector pin 35 passes through the hollow cavity 322, the isolation plug 332, the second sealed cavity 331, and the head shell 34 in sequence. The diameter of the ejector pin 35 is smaller than that of the hair transplant needle 36. When the spring 323 is retracted, the ejector pin 35 is located at the rear of the hair transplant needle 36, and the hair transplant needle 36 is connected to the second sealed cavity 331. Because the second sealed cavity 331 is connected to the negative pressure system, the hair transplant needle 36 can absorb hair. When the spring 323 is released, the ejector pin 35 passes through the hair transplant needle 36 along its axis, pushing the hair out of the hair transplant needle 36.

[0028] In some embodiments, the host 1 may further include a control device 51. The control device 51 is used to receive an adjustment signal from the first sealed cavity 321 and send a signal to the negative pressure system to adjust the pressure in the first sealed cavity 321. The control device 51 counts the number of times the ejector 35 is pushed by calculating the adjustment signal. When the first negative pressure system is connected to the first communicating vessel 311, the ejector 35 is retracted. When the connection between the first negative pressure system and the first communicating vessel 311 is cut off, the first communicating vessel 311 is connected to the outside world, the spring 323 is released, and the ejector 35 is pushed forward. At this time, the control device 51 completes one count.

[0029] In some embodiments, the hair retrieval device 2 may include a second housing, a hair retrieval punch 27, and a motor 26. The second housing includes a tail cover 21, a motor housing 22, a needle housing 24, and a connecting cover 23. The tail cover 21, motor housing 22, connecting cover 23, and needle housing 24 are sequentially connected. The tail cover 21 is provided with a third connecting vessel 25 and a second hollow cavity 322. The tail of the motor 26 is connected to the tail cover 21, which also includes a cable hole for the power supply 26 cable to pass through. A sealing ring seals the cable hole and the cable of the motor 26. The tail cover 21 is threadedly connected to the motor housing 22. In some embodiments, a sealing ring is provided at the connection between the tail cover 21 and the motor housing 22. The motor 26 is disposed within the motor housing 22. The connecting cover 23 includes an isolation plate, a first connecting shell, and a second connecting shell. The first connecting shell is threadedly connected to the motor housing 22. A hole is provided in the middle of the isolation plate for the power supply shaft 261 to pass through. The second connecting shell is threadedly connected to the needle housing 24. A connecting cavity and a coaxial cavity are provided in the needle housing 24 .

[0030] The interior of the hair extraction punch needle 27 is hollow. A needle sleeve 28 is provided on the hair extraction punch needle 27. The needle sleeve 28 includes a connecting sleeve 281 and a coaxial sleeve 282. The hair extraction punch needle 27 and the needle sleeve 28 are coaxially arranged. The motor shaft 261 is a hollow shaft. A coupling 262 is provided on the motor shaft 261, and the connecting sleeve 281 is inserted into the coupling 262 and connected to the motor shaft 261. The motor shaft 261 drives the coupling sleeve and the coaxial sleeve 282 to rotate by driving the coupling 262. The coupling 262 and the connecting sleeve 281 are both arranged in a connecting cavity. A bearing 29 is provided in the coaxial cavity; the coaxial sleeve 282 passes through the bearing 29. The bearing 29 allows the coaxial sleeve 282 to rotate freely in the coaxial cavity. The coaxial cavity also allows the hair extraction punch needle 27 to rotate around the same axis during rotation, thereby avoiding problems such as large deviations causing needle skipping.

[0031] The hair retrieval needle 27 passes through the needle sleeve 28 and the motor shaft 261, extending into the second hollow cavity 322 and communicating with the third communication vessel 25. When the negative pressure system is connected to the third communication vessel 25, the head of the hair retrieval needle 27 absorbs waste liquid and waste, keeping the head clean and facilitating operation by medical personnel. The hair retrieval needle 27 rotates due to the friction between the motor shaft 261 and the needle sleeve 28.

[0032] To address the inconvenience of replacing the hair retrieval punch 27, a hair retrieval punch 27 is provided according to other embodiments of the present disclosure. The hair retrieval punch 27 is provided with a booster sleeve 273; the booster sleeve 273 is fixedly connected to the hair retrieval punch 27. The booster sleeve 273 includes a raised portion 2731, an annular groove 2732, and a coaxial portion 2733; the annular groove 2732 is provided between the raised portion 2731 and the coaxial portion 2733. When the hair retrieval punch 27 is inserted into the hair retrieval device 2, the coaxial portion 2733 is inserted into the coaxial sleeve 282 and contacts the coaxial sleeve 282.

[0033] In some embodiments, the inner diameter of the connecting sleeve 281 is compatible with the outer diameter of the hair retrieval punch 27, allowing it to rotate due to friction. The inner diameter of the coaxial sleeve 282 is slightly larger than the outer diameter of the hair retrieval punch 27. The inner diameter of the coaxial sleeve 282 is compatible with the outer diameter of the coaxial portion 2733 of the boosting sleeve 273, allowing it to rotate the boosting sleeve 273. The combined action of the boosting sleeve 273 and the connecting sleeve 281 allows the hair retrieval punch 27 to rotate smoothly and maintain rotation around the same axis, avoiding the problem of skipped needles.

[0034] When the hair retrieval punch 27 needs to be replaced, the hair retrieval punch 27 can be removed from the hair retrieval device 2 using pliers or a dedicated insertion and extraction tool with the aid of the annular groove 2732 and the raised portion 2731. Conversely, the hair retrieval punch 27 can be inserted into the hair retrieval device 2. By cooperating with the hair retrieval punch 27 and the hair retrieval device 2 according to some embodiments of the present disclosure, a detachable connection between the hair retrieval punch 27 and the hair retrieval device 2 is achieved.

[0035] To address the issues of efficiency and scalp damage during hair removal and perforation, another embodiment of the present disclosure provides a hair removal and perforation needle 27. The hair removal and perforation needle 27 includes a needle head 271 and a needle body 272; the booster sleeve 273 is disposed on the needle body 272. The needle head 271 includes a cutting portion 2711, an expansion portion, and a limiting portion 2713.

[0036] The inner diameter of the needle body 272 is 1.12-1.13 mm, and the outer diameter is 1.46-1.47 mm; the inner diameter of the needle head 271 is 0.55-0.85 mm. The outer diameter of the restricting portion 2713 is slightly smaller than the outer diameter of the needle body 272. The cutting portion 2711 and the expansion portion are conical, with the normal of the cutting portion 2711 forming an angle of 20-26 degrees with the axis of the hair retrieval needle 27, and the normal of the expansion portion forming an angle of 2-4 degrees with the axis of the hair retrieval needle 27.

[0037] During use, the cutting portion 2711 can quickly break the scalp, while the expanding portion 2712 can expand the opening from a relatively small position, facilitating hair removal. The limiting portion 2713 can have an outer diameter slightly smaller than the needle body 272, forming a platform at the junction of the two. This limits the insertion depth of the hair removal punching needle 27, preventing damage to the scalp caused by excessive insertion.

[0038] During use, a larger inner diameter punching needle 27 can be used for hair removal, while a smaller inner diameter can be used for hair drilling. This approach reduces scalp damage. Because the punching hole diameter is smaller than the hair removal hole diameter, the hole will more tightly wrap the hair follicle after transplantation, making it easier for the hair follicle to obtain nutrients, thereby improving hair survival.

[0039] Example 7

[0040] Based on the above embodiments, this embodiment provides a negative pressure system; in some embodiments, the negative pressure system may include a vacuum pump 41, an air distribution exhaust 42, a pressure gauge 43, a three-way solenoid valve 45, a filter plate 46, a gas cylinder 47 and an electromagnetic clamp valve.

[0041] The vacuum pump 41 is connected to the air distribution row 42; the air distribution row 42 is connected to a pressure gauge 43, and the vacuum degree in the negative pressure system can be displayed by the pressure gauge 43; the air pressure row is also connected to a filter disc 46 and a three-way solenoid valve 45, and the electric three-way solenoid valve is connected to the first communicating vessel 311; the first communicating vessel 311 is controlled by the three-way solenoid valve 45 to be connected to the negative pressure system or the atmosphere; the filter disc 46 is connected to the gas cylinder 47, and most of the waste liquid and waste can be intercepted by the gas cylinder 47; the gas cylinder 47 is connected to the electromagnetic pinch valve 44, and the electromagnetic pinch valve 44 is connected to the second communicating vessel 333 and the third communicating vessel 25, and the second communicating vessel 333 and the third communicating vessel 25 are controlled to be connected to the negative pressure system through the electromagnetic pinch valve 44.

[0042] In some embodiments, the control device 51 can be electrically connected to the push switch, the three-way solenoid valve 45, and the solenoid pinch valve 44; this electrical connection can be wired or wireless. The push switch is used to issue a pressure regulation signal for the first sealed chamber 321, wherein the regulation signal includes an on or off signal. Upon receiving the on signal, the control device 51 controls the three-way solenoid valve 45 to connect the first communication vessel 311 to the negative pressure system, thereby creating a negative pressure state within the first sealed chamber 321. Upon receiving the off signal, the control device 51 connects the first sealed chamber 321 to the air via the three-way solenoid valve 45.

[0043] The control device 51 is electrically connected to the control panel 11, which is used to display hair transplant information, including the number of transplanted hairs. The control panel 11 is also used to send control signals to the control device 51, controlling the solenoid pinch valve 44 to connect the second connector 333 and the third connector 25 to the negative pressure system. Upon receiving a set of on and off signals, the control device 51 increments the number of transplanted hairs by one. Thus, the number of transplanted hairs can be displayed in real time on the control panel 11.

[0044] Since hair transplantation requires repeated operations, in order to free the hands of medical personnel, in some embodiments, the push switch used is a foot switch 52.

[0045] In some embodiments, the hair transplant device includes two hair transplanters 3 and two foot switches 52. The two hair transplanters 3 are respectively connected to an electromagnetic pinch valve 44 and a three-way electromagnetic valve 45, and are connected in parallel to the negative pressure system. The two foot switches 52 respectively control the two three-way electromagnetic valves 45.

[0046] In some embodiments, the hair transplant device further includes an electrical system equipped with an automatic voltage transformer to adapt to various power supply environments. The electrical system includes an air switch 61, a power switch, and a power shunt board 62, enabling the electrical system to power electrical devices.

[0047] According to some embodiments of the present disclosure, a hair transplantation method is provided, which uses the hair transplantation device described in the above embodiments.

[0048] In some embodiments, the microneedle refers to a punching needle used for punching.

[0049] In some embodiments, the hair transplant method may include steps 1 to 3.

[0050] In step 1, take the hair:

[0051] Insert the hair into the needle 271 of the hair remover 2 and slowly insert the needle 271 into the scalp to sever the hair follicle from the scalp. The negative pressure system absorbs waste liquid and waste, and also loosens the hair follicles, facilitating subsequent hair extraction. Remove the hair with tweezers and place it in a dedicated tray.

[0052] In step 2, change the needle and punch the hole:

[0053] Use a tool to take out the hair removal punching needle 27, replace the needle 271 of the hair removal device 2 with a needle 271 with a smaller aperture, and punch a hole in the hair transplant site.

[0054] In step 3, hair transplant:

[0055] The push switch of the hair transplant device is controlled to retract the ejector pin 35 and connect the hair transplant needle 36 to the negative pressure system, thereby allowing the hair to be absorbed. The hair transplant needle 36 is aligned with the punched needle hole, and the push switch is controlled to release the ejector pin 35 to implant the hair into the hole.

[0056] The technical solutions according to some embodiments of the present disclosure have at least the following beneficial technical effects:

[0057] 1. Microneedle hair transplantation on the market mainly uses the number of implanted hair follicles as the basis for charging. The host computer is used to count the number of times the needle is pushed, and then the number of implanted hairs is counted, which can reduce the workload of doctors.

[0058] 2. The annular groove on the hair removal punching needle can be used to easily replace the hair removal punching needle, so that one person can use one needle to avoid cross infection.

[0059] 3. The use of a negative pressure system facilitates the collection of waste liquid and waste during hair removal, drilling, and hair transplantation, which can reduce the doctor's workload and improve the doctor's work efficiency.

[0060] The embodiments of the present disclosure are merely explanations of the present disclosure and are not limitations of the present disclosure. After reading this specification, those skilled in the art may make non-creative modifications to the embodiments as needed, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present disclosure.

Claims

1. A hair removal and transplantation device, comprising a main unit, a hair removal device and a hair transplantation device; The host is used to control the hair remover and the hair implanter; The host comprises a negative pressure system, and the negative pressure system is used to provide negative pressure for the hair remover and the hair implanter; The hair remover is used to extract and punch hair, and to absorb waste liquid and waste by using negative pressure; The hair transplanter is used to achieve hair transplantation and utilizes negative pressure to achieve hair absorption; The hair transplanter comprises a hair transplant needle and a thimble, wherein the hair transplant needle is used to place hair, and the thimble is used to push the hair out of the hair transplant needle; and The host is also used to count the number of times the ejector pin is pushed.

2. The hair transplantation device according to claim 1, wherein: The hair implant also includes a first shell and a needle pushing mechanism; the needle pushing mechanism includes a piston and a reciprocating mechanism; the ejector pin is connected to the piston; the reciprocating mechanism pushes the piston to perform reciprocating motion, thereby driving the ejector pin to push and retract.

3. The hair transplantation device according to claim 2, wherein: The reciprocating mechanism includes a first sealed cavity provided in a first shell and a spring provided in the first sealed cavity; one end of the spring abuts against the first shell, and the other end abuts against the piston; the first sealed cavity is communicated with a first communicating vessel; the first communicating vessel is communicated with the negative pressure system; the air pressure in the first sealed cavity can be reduced by the negative pressure system, so that the piston squeezes the spring, and the piston drives the spring to retract; after the negative pressure system stops working, the spring resets and pushes the ejector forward to complete the pushing.

4. The hair transplantation device according to claim 3, wherein: A second sealed cavity is also provided in the first shell; the hair implant needle is connected to the second sealed cavity; the second sealed cavity is connected to the second communicating vessel, and the second communicating vessel is connected to the negative pressure system.

5. The hair transplantation device according to claim 3, wherein: The host also includes a control device, which is used to receive an adjustment signal from the first sealed cavity and send a signal to the negative pressure system to adjust the pressure in the first sealed cavity; the control device counts the number of times the ejector is pushed by calculating the adjustment signal.

6. The hair transplantation device according to claim 3, wherein: The hair extractor comprises a second shell, a hair extracting punching needle and a motor; the motor and the hair extracting punching needle are arranged in the second shell; a third connecting vessel is arranged at the tail of the second shell; the hair extracting punching needle is hollow inside; the motor drives the hair extracting punching needle to rotate, and the hair extracting and punching are realized by the hair extracting punching needle; The motor includes a motor shaft, which is a hollow shaft. One end of the hair removal punch needle passes through the second shell and extends out from the head of the second shell, and the other end passes through the motor shaft and is connected to the first communicating vessel; the third communicating vessel is connected to the negative pressure system.

7. The hair transplantation device according to claim 6, wherein: The hair retrieval device also includes a coupling and a needle sleeve; the needle sleeve is mounted on the hair retrieval punching needle; the coupling is mounted on the motor shaft and the needle sleeve; the motor shaft drives the needle sleeve to rotate through the coupling; the needle sleeve is tightly matched with the hair retrieval punching needle, and drives the hair retrieval punching needle to rotate through friction.

8. The hair transplantation device according to claim 7, wherein: The second housing comprises a needle sleeve shell, a motor shell and a connection cover; the motor is arranged in the motor shell; the needle sleeve is arranged in the needle sleeve shell; the needle sleeve shell is connected to the motor shell through the connection cover; the needle sleeve shell and the connection cover are detachably connected.

9. The hair transplantation device according to claim 6, wherein: The hair retrieval punch needle is provided with a power-assisting sleeve, and the power-assisting sleeve is provided with an annular groove; the annular groove is used for cooperating with an insertion and extraction tool when inserting and extracting the hair retrieval punch needle.

10. A method for hair transplantation, using the hair transplantation device according to claim 9, wherein the hair transplantation punch comprises a needle head, wherein: The diameter of the needle of the hair removal punching needle used for punching is smaller than the diameter of the needle of the hair removal punching needle used for hair removal.

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