Painless puncture needle and painless puncture method

Abstract

The present invention discloses a painless puncture needle and a painless puncture method thereof. The painless puncture needle comprises a transcutaneous electrical nerve stimulation electrode part and a bionic needle part; the bionic needle part includes a puncture needle tube, blades on both sides of the needle tube, a vibration control part and a needle head housing. The needle tube includes a pointed head, and a plurality of annular grooves are formed on the side wall. The blades are designed by imitating the edge of the mosquito mandibular mouthpart, and include three double-sided edge blades with uneven spacing. The puncture method enables the blades on both sides to move forward respectively, move backward respectively, or move together with the central needle, presenting four intermediate states; cycling through the four intermediate states can enable the central needle to continuously advance during the relative movement process, and well realizes the insertion process of the bionic mosquito mouthpart. The present invention has made an improved design of the needle structure on the basis of the bionic form, and combined with the bionic puncture method, can achieve painless puncture of micro-vessels.

Description

Technical Field

[0001] The present invention relates to the technical field of painless puncture, and more specifically, to a painless puncture needle and a painless puncture method thereof. Background Art

[0002] With the development of science and technology, the frequency of medical puncture is increasing. Puncture is used in clinical medical diagnosis and treatment methods such as tissue sample testing, blood tests, and injections. There are three main types of puncture needles on the market, namely blunt needles, edged needles, and knife needles. They are more destructive to tissues and the human body feels more strongly. Traditional blood collection needles also have the problem of strong pain. None of the three needles on the market can reduce the pain felt by the human body during the puncture process, nor do they use bionic structures to improve the special needs of specific groups of people. Special groups such as children and the elderly react more strongly to the pain during the puncture process, so there is an urgent need for a painless puncture needle that can reduce the pain of the human body.

[0003] The Chinese patent with publication number CN201810346735.8 and publication date 20191029 discloses a puncture needle with a blade edge, including a positioning head, at least two double-edged edges and a guide body; the positioning head is located at the front end of the guide body, and the double-edged edges are arranged on the outer surface of the guide body; the edges of the double-edged edges of the needle are all round edges, or part of them are round edges and part of them are angled edges. The invention also discloses a visual puncture needle, including the puncture needle. The visual puncture needle of the invention has a simple structure, is easy to use, and has good sealing performance. It can effectively reduce the puncture resistance of the puncture needle inserted into the abdominal cavity, and reduce the damage caused by the puncture process, which can shorten the operation time and reduce the surgical risk. However, there is still room for improvement in the invention. The essence of the invention lies in the improvement of the puncture needle, which is mainly used in the operation of various organs of the human body, but cannot be used for small blood collection needles and small venous punctures. In addition, the puncture needle does not provide a puncture method to reduce pain, and does not play a role in reducing the pain of the user during the puncture process.

[0004] Therefore, developing a needle capable of achieving painless puncture and a painless puncture method thereof is a technical problem to be solved urgently. Summary of the invention

[0005] Due to the above-mentioned defects in the prior art, the present invention provides a painless puncture needle and a painless puncture method thereof to solve the problem of how to achieve painless puncture and blood collection.

[0006] To achieve the above-mentioned object, on the one hand, the present invention provides a painless puncture needle, characterized in that it comprises a TENS transcutaneous electrical nerve stimulation electrode part and a bionic needle part;

[0007] The TENS transcutaneous electrical nerve stimulation electrode part includes a flexible electronic material patch and a TENS adjustable electrical stimulation power supply; the bionic needle part includes a puncture needle tube, blades on both sides of the needle tube, a vibration control part and a needle shell wrapping the needle tube and the blades; the flexible electronic material patch is arranged outside the free end surface of the needle shell, and includes a positive electrode and a negative electrode with a certain distance that can be attached to the skin surface.

[0008] Transcutaneous Electrical Nerve Stimulation (TENS) is a non-drug, non-invasive analgesic method that blocks the transmission of pain nerve signals by stimulating sensory nerves with a mild, trace amount of electric current, thereby achieving an analgesic effect. The present invention provides transcutaneous electrical nerve stimulation electrodes, which can reduce the pain of puncture suffered by a person by attaching flexible electronic material patches to both sides of the injection point, while not generating any additional pain caused by the voltage applied by the electrodes; a medium-high frequency, high-voltage power supply is applied to both ends of the electrodes, and the power supply strength varies from person to person, until slight pain is caused to the person; during injection, the power-on time is controlled so that the person can hardly feel the pain caused by the power-on, and then electrical stimulation is used for pain suppression; the main reason for pain suppression is that the large afferent fibers suppress the secondary pain neurons in the spinal cord. The electrodes are made of lead-tin alloy, which is easy to generate electrical stimulation, and because the human skin resistance is small, they can be used normally after applying a disinfectant solution.

[0009] Furthermore, the TENS adjustable electrical stimulation power source is a transcutaneous nerve electrical stimulation current source with adjustable frequency, variable pulse width and adjustable current. In actual operation, the frequency, current intensity and pulse width of the electrical stimulation can be adjusted according to the general feeling of the person receiving the puncture.

[0010] Furthermore, the needle tube comprises a pointed tip, and a plurality of annular grooves are formed on the side wall. The annular grooves can reduce the resistance when the needle tube is inserted, thereby further reducing the pain of puncture.

[0011] Furthermore, the blade is designed to imitate the patterns, spacing and blade curvature of the edge of the mandibles of mosquitoes, and includes a three-way edge sharpening design with uneven spacing.

[0012] Furthermore, the width, spacing and depth of the annular groove are different. Starting from the free end point of the puncture needle housing, the ratio of width b is 1:2:3, the ratio of depth h is 5:6:8, and the ratio of spacing d is 7:13:17. This feature can more effectively cut human tissue with less human sensation, and better play the role of reducing pain.

[0013] Furthermore, the edge spacing starts from the free end point of the blade, which conforms to the ratio of 7:13:17 of the mosquito mandible edge in the bionic structure.

[0014] Furthermore, the vibration control part includes two rotating pairs controlled by motors, two transmission rods, the connecting parts of the syringe blades on both sides, a central push rod, a linkage device, and a program control part; each rotating pair on one side includes a gear transmission or a worm and worm gear transmission structure, which can convert the rotational motion of the motor into a linear motion, thereby controlling the forward and backward movement of the blade, and the movements can be asynchronous; the central push rod can push the syringe forward; the linkage device can connect and bind the central push rod and the transmission rods on both sides and push or retract them together; the program control part can control the advancing distance of the blade and the syringe. The vibration mode of the blade can achieve a back-and-forth vibration similar to simple harmonic vibration.

[0015] On the other hand, the present invention provides a painless puncture method, which is characterized in that it is realized by the above-mentioned painless puncture needle, and includes the following steps:

[0016] Step S1, preparation stage, including a detection step and an exhaust step: Keep the syringe part protruding from the needle housing to an appropriate position; Check the electrode power supply to ensure the normal operation of the power supply part;

[0017] Step S2, painless application stage: Plan the needle insertion position according to the medical imaging data of the puncture object and the personal experience of the practitioner, and disinfect the target area; Apply a flexible electronic material patch containing positive and negative electrode patches at the position, and adjust the TENS microcurrent to an appropriate size;

[0018] Step S3, puncture stage: Name the blade parts on both sides as side A and side B respectively; It includes the following sub-steps:

[0019] Step S31, the main push rod of the motor is pushed out by 1-4 mm to make the needle enter the human body;

[0020] Step S32, the blade on side A is pushed forward, the blade on side B keeps slightly vibrating, and the syringe keeps still;

[0021] Step S33, the syringe is pushed forward and the blade on side A retracts;

[0022] Step S34, the blade on side B is pushed forward, the blade on side A keeps slightly vibrating, and the syringe keeps still;

[0023] Step S35, the syringe is pushed forward and the blade on side B retracts;

[0024] Step S36, repeat steps S32 to S35 until the needle reaches the puncture distance of the positioning reference;

[0025] Step S4, needle withdrawal stage: It includes the following sub-steps:

[0026] Step S41, the syringe retracts backward and the blade on side B advances slightly;

[0027] Step S42: The blade on the B side retracts backward, the blade on the A side remains vibrating slightly, and the syringe needle remains stationary.

[0028] Step S43: The syringe needle retracts backward, and the blade on the A side advances slightly.

[0029] Step S44: The blade on the A side advances forward, the blade on the B side remains vibrating slightly, and the syringe needle remains stationary.

[0030] Step S45: Repeat steps S41 to S44 in a loop until the distance between the needle tip and the positioning reference needle outside the body reaches the required value.

[0031] Step S46: The main push rod of the motor retracts 1 - 4 mm to make the needle tip leave the human body.

[0032] In the described puncture method, the two side blades move forward or backward separately or move together with the syringe needle, presenting four intermediate states. Cycling through these four intermediate states enables the syringe needle to continuously advance during relative movement, thus well realizing the insertion process of the bionic mosquito mouthpart.

[0033] Further, in step S2, the TENS power-on pulse frequency is maintained at 40 - 60 Hz; the included angle between the positive and negative electrode patches is 110 - 130 degrees, the applied voltage is 30 - 50 V, and the magnitude of the passing current is 20 - 30 mA.

[0034] Further, in step S3 or S4, after each cycle is executed, the relative distance between the syringe needle and the two side blades should remain unchanged; the advancing or retracting distance of the two side blades each time is the step size, and the retracting or advancing distance is 1 / √2 of the step size. This feature controls the progress and stepping uniformity of the puncture process and further reduces pain.

[0035] Further, in step S3 or S4, when the remaining advancing or retracting distance is less than the step size, the advancing or retracting distance each time is taken as 1 / √2 of the previous advancing or retracting distance.

[0036] Compared with the prior art, the above invention has the following advantages or beneficial effects:

[0037] (1) The structure of the traditional puncture needle is improved: a bionic design of organisms such as mosquitoes is carried out, and on the basis of bionics, an improved design of a bionic syringe needle with annular grooves plus bionic blades on both outer sides is made.

[0038] (2) The serrated structure of the mosquito mandible is mainly bionically designed on the two side blades, and the serration shape, width, and the ratio of the blade depth are controlled to be basically the same as those of the mosquito mandible, further reducing the friction during the puncture process.

[0039] (3) The two-sided blades can move forward separately, move backward separately, and move together with the syringe. There are a total of four intermediate states. Cycling through these four states enables the syringe to continuously advance during relative movement, achieving the insertion process of the bionic mosquito mouthpart;

[0040] (4) By the forward movement and vibration of the two-sided blades respectively, a bionic mosquito mouthpart is realized, which can perform relative movement so that the tissue near the puncture does not undergo excessive deformation, thereby achieving painlessness;

[0041] (5) Percutaneous electrical nerve stimulation electrodes are provided. By attaching flexible electronic material patches on both sides of the injection point, the pain caused by the puncture on the human body can be reduced. At the same time, no additional pain caused by the voltage applied by the electrodes is generated, further reducing the pain sensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, the present invention, its features, appearance, and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and the emphasis is on showing the gist of the present invention.

[0043] Figure 1 It is a structural diagram inside the painless puncture needle in an embodiment of the present invention;

[0044] Figure 2 It is a bottom view of the outside of the painless puncture needle in an embodiment of the present invention;

[0045] Figure 3 It is a side view of the outside of the painless puncture needle in an embodiment of the present invention;

[0046] Figure 4 It is a cross-sectional view inside the painless puncture needle in an embodiment of the present invention;

[0047] Figure 5 It is a three-dimensional structural schematic diagram inside the painless puncture needle in an embodiment of the present invention;

[0048] Figure 6 It is a partial side view inside the painless puncture needle in an embodiment of the present invention;

[0049] Figure 7 It is a side view of the blade of the painless puncture needle in an embodiment of the present invention;

[0050] Figure 8 It is a flowchart of the painless puncture method in an embodiment of the present invention;

[0051] Figure 9 It is a schematic diagram of a non-parallel plate capacitor in an embodiment of the present invention;

[0052] Among them, 1 is a needle tube, 12 is a needle shell, 2 is a blade, 31 is a rotating pair, 4 is a flexible electronic material patch, 5 is a positive electrode, and 6 is a negative electrode. DETAILED DESCRIPTION

[0053] The structure of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0054] Example 1

[0055] A painless puncture needle comprises a bionic needle portion and a TENS transcutaneous electrical nerve stimulation electrode portion; see Figure 1 The painless puncture needle comprises a needle tube 1, blades 2 on both sides of the needle tube, and a vibration control part of the needle tube and the blades; see Figure 2 and Figure 3 The TENS transcutaneous electrical nerve stimulation electrode part includes a flexible electronic material patch 4 and a TENS adjustable electrical stimulation power supply; the flexible electronic material patch 4 is arranged outside the free end surface of the needle shell 12, and includes a positive electrode 5 and a negative electrode 6 with a certain distance that can be attached to the skin surface.

[0056] In this embodiment, the TENS adjustable electrical stimulation power source is a transcutaneous nerve electrical stimulation current source with adjustable frequency, variable pulse width, and adjustable current.

[0057] See also Figures 4 to 6 The needle tube includes a pointed tip, and a plurality of annular grooves are formed on the side wall. The width b, spacing d and depth h of the annular grooves are different. Starting from the free end point of the puncture needle shell, the ratio of the width b is 1:2:3, the ratio of the depth h is 5:6:8, and the ratio of the spacing d is 7:13:17. Starting from the free end point of the puncture needle shell, the specific value of the width b of the annular groove can be 0.1mm, 0.2mm, 0.3mm; the specific value of the depth h can be 0.05mm, 0.06mm, 0.8mm; the specific value of the spacing d can be 0.7mm, 1.3mm, 1.7mm.

[0058] See also Figure 7 The blade 2 is designed to imitate the pattern, spacing, and blade curvature of the edge of the mosquito mandible mouthparts, and includes three bidirectional edge cutting designs with uneven spacing. The edge spacing starts from the free end point of the blade, which conforms to the ratio of the mosquito mandible edge in the bionic structure of 7:13:17. Starting from the free end point of the blade, the specific value of the edge spacing can be selected as 1.81mm, 3.38mm, and 4.40mm.

[0059] See also Figure 1, the vibration control part includes two rotating pairs 31 controlled by motors, two transmission rods, the connecting parts of the needle blades on both sides, a central push rod, a linkage device, and a program control part; each of the rotating pairs 31 on one side includes a gear transmission or a worm and worm gear transmission mechanism, which can convert the rotational motion of the motor into a linear motion, thereby controlling the forward and backward movement of the blade, and the movements can be asynchronous; the central push rod can push the syringe forward; the linkage device can connect and bind the central push rod and the transmission rods on both sides and push them forward or backward together; the program control part can control the advancing distance of the blade and the syringe.

[0060] See Figure 8 , a painless puncture method is realized through the above painless puncture needle, including the following steps:

[0061] Step S1, preparation stage, including a detection step and an exhaust step: Keep the syringe protruding from the needle housing to a fixed position and keep the needle part fixed well; Check the power-on condition of the electrode to ensure the normal operation of the power supply part.

[0062] Step S2, painless application stage: Plan the needle insertion position according to the medical imaging data of the puncture object and the personal experience of the practitioner and disinfect the target area; Apply a flexible electronic material patch containing positive and negative electrode patches at the position and adjust the TENS microcurrent to an appropriate size.

[0063] Step S3, puncture stage: Name the blade parts on both sides as side A and side B respectively; It includes the following sub-steps:

[0064] Step S31, the main push rod of the motor is pushed out by 1-4 mm to make the needle enter the human body; In this embodiment, 2 mm is selected.

[0065] Step S32, the blade on side A is pushed forward, the blade on side B keeps slightly vibrating, and the syringe keeps still.

[0066] Step S33, the syringe is pushed forward and the blade on side A retracts.

[0067] Step S34, the blade on side B is pushed forward, the blade on side A keeps slightly vibrating, and the syringe keeps still.

[0068] Step S35, the syringe is pushed forward and the blade on side B retracts.

[0069] Step S36, repeat steps S32 to S35 in a loop until the needle reaches the puncture distance of the positioning reference.

[0070] Step S4, needle withdrawal stage: It includes the following sub-steps:

[0071] Step S41, the syringe retracts backward and the blade on side B advances slightly.

[0072] Step S42: The blade on the B side retracts backward, the blade on the A side remains slightly vibrating, and the syringe needle remains stationary.

[0073] Step S43: The syringe needle retracts backward, and the blade on the A side advances slightly.

[0074] Step S44: The blade on the A side advances forward, the blade on the B side remains slightly vibrating, and the syringe needle remains stationary.

[0075] Step S45: Repeat steps S41 to S44 in a loop until the distance of the needle tip from the positioning reference needle outside the body is reached.

[0076] Step S46: The main push rod of the motor retracts 1 - 4 mm to separate the needle tip from the human body; in this embodiment, 2 mm is selected.

[0077] In this embodiment, in step S2, the TENS power-on pulse frequency is maintained at 40 - 60 Hz, and specifically, 50 Hz can be selected. The included angle between the positive and negative electrode patches is 110 - 130 degrees, the applied voltage is 30 - 50 V, and the magnitude of the passing current is 20 - 30 mA; specifically, the included angle is 120 degrees, the applied voltage is 40 V, and the passing current is 25 mA.

[0078] In step S3 or S4, after each cycle is executed, the relative distance between the syringe needle and the blades on both sides should remain unchanged; the distance of each forward or backward movement of the blades on both sides is the step size, and the retraction or advancement distance is 1 / √2 of the step size.

[0079] In this embodiment, the step size is selected as 3 mm. In step S3 or S4, when the remaining forward or backward distance is less than the step size, the forward or backward distance each time is taken as 1 / √2 of the previous forward or backward distance.

[0080] Specifically, during the puncture stage, the forward movement distance of the blades on both the A and B sides each time is denoted as S1, and the retraction distance of the blades is denoted as S2. Then, the total forward movement distance of the blades in one cycle is denoted as S1 - S2; after the forward movement of the left and right blades is completed in one cycle, in order to ensure that the relative distance between the syringe needle and both sides remains unchanged, the forward movement distance of the syringe needle should be

[0081] During the puncture process, when there are still 3 mm left from the blood vessel, the puncture distance decreases each time, approximately being

[0082] Since the inner diameter of the general elastic artery in the human body is 1.5 cm, the muscular artery is 6 mm, the vein is 5 mm, the arteriole is 37 microns, the capillary is 9 microns, and the venule is 20 microns. When drawing blood, the superficial vein in the elbow of the upper limb is generally used, with an inner diameter of about 3 - 5 mm. Taking 2.5 mm, which is a little smaller than the minimum value, so the step distance a each time n should satisfy:

[0083]

[0084] Since there is a situation where the last feed reaches the target blood vessel, the following should also be satisfied:

[0085]

[0086] where a1, a2... a n values form a geometric sequence, and a1 = 3mm; And so on,

[0087] Since the external current frequency is 50Hz, the vibration frequency of the stationary blade is maintained at 50Hz. Referring to the average puncture time of Chinese doctors being 1.5 seconds, the total time required for the entire puncture process should be within 3 seconds. During the puncture stage, the time required for each cycle should be around 0.5 seconds.

[0088] Calculate the electric potential and current between the two electrode plates through the capacitance of a non - parallel - plate capacitor. Assume Figure 9 The included angle between the two electrode plates shown is θ, the length of the electrode plate is a, the width is b, and the distance between the closest point of the two plates and the center of the circle is s.

[0089] Let the b - direction along one of the plates be the x - direction. At a frequency of 100KHz, the relative permittivity of muscle is 66.2, and that of fat is 12.7; at a frequency of 400KHz, the relative permittivity of muscle is 58.0, and that of fat is 11.6. Taking the average relative permittivity of the human body at 150KHz as 50.0. Taking the inner diameter of the needle as 16mm, estimate the distance between the two electrode plates when placed flat as 20mm, and the distance from the opened electrode plate to the center of the opening angle

[0090] Since there is an included angle between the two capacitor plates, the equipotential lines are rays with the center of the circle as the base point and sandwiched between the two electrode plates. Therefore, from the fact that the electric field intensity is perpendicular to the equipotential line, the direction of the electric field intensity E is along the circular arc direction. Then, the charge density and the distribution density of the electric field intensity with respect to the x - direction change, while there is no change in the distribution density along the length l of the capacitor plate. Let the charge density at point x be σ x ; Q = ∫dQ = ∫σ x adx.

[0091] Take a small plane with an area of Δs at point x. Using Gauss's theorem, construct a Gaussian surface along the electric field line. Since the side surface is made along the electric field intensity, the integral of the Gaussian surface is zero. The upper surface is inside the capacitor plate, and in a conductor, the Gaussian surface integral is also zero at equilibrium. The electric field intensity of the lower surface is E, and we get That is

[0092] Also, because where l x is the distance traveled along the tangent direction of the electric field intensity between the two plates at x;

[0093] Substituting into the above formula, we have:

[0094] Then the l at x x has a length of; l x = θ(s + x).

[0095] Then the expression for Q is:

[0096] Then the capacitance value of the capacitor is:

[0097] In a real device, the required voltage and the magnitude of the electrode charge can be determined from this formula, as well as the length a, width b, AC power supply frequency f, included angle θ between the two electrode plates, distance s from the electrode plate to the center of the opening angle, and the magnitude of the reference current.

[0098] Example 2

[0099] A painless puncture needle, whose structure and puncture method are similar to those in Example 1. Different from Example 1, for blood drawing from a small vein with an inner diameter of about 20 microns, the step size is selected as 18 μm. Therefore, the stepping distance a each time n should satisfy:

[0100]

[0101] Since there is a situation where the last knife advance reaches the target blood vessel, it should also satisfy:

[0102]

[0103] where a1, a2... a n values form a geometric sequence, and a1 = 18 μm; And so on,

[0104] Example 3

[0105] A painless puncture needle, whose structure and puncture method are similar to those in Example 1. Different from Example 1, for blood drawing from a capillary with an inner diameter of about 9 microns, the step size is selected as 8 μm. Therefore, the stepping distance a each time n should satisfy:

[0106]

[0107] Since there is a situation where the last feed reaches the target blood vessel, the following should also be satisfied:

[0108]

[0109] where a1, a2... a n values form a geometric sequence, and a1 = 8 μm; And so on.

[0110] In summary, the present invention provides a painless puncture needle and a painless puncture method thereof. The painless puncture needle includes a transcutaneous electrical nerve stimulation electrode part and a bionic needle part; the bionic needle part includes a puncture needle tube, blades on both sides of the needle tube, a vibration control part, and a needle head housing. The needle tube includes a pointed tip and a plurality of annular grooves are formed on the side wall. The blades are designed by imitating the edge of the mosquito mandibular mouthpart and include three double-sided edge blades with uneven spacing. The puncture method allows the blades on both sides to move forward or backward respectively, or move together with the central needle, presenting four intermediate states; cycling through the four intermediate states can make the central needle continuously advance during the relative movement, and well realizes the insertion process of the bionic mosquito mouthpart. The present invention improves the design of the needle structure on the basis of the bionic form, and combines with the bionic puncture method to achieve painless puncture of micro-vessels.

[0111] Those skilled in the art should understand that those skilled in the art can achieve variation examples in combination with the prior art and the above embodiments, which will not be elaborated here. Such variation examples do not affect the essence of the present invention and will not be elaborated here.

[0112] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and the equipment and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art, without departing from the scope of the technical solution of the present invention, can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. A painless puncture needle, characterized in that, It includes a TENS transcutaneous electrical nerve stimulation electrode part and a bionic needle part; The TENS transcutaneous electrical nerve stimulation electrode part includes a flexible electronic material patch and a TENS adjustable electrical stimulation power supply; the bionic needle part includes a puncture needle tube, blades on both sides of the needle tube, a vibration control part, and a needle head housing that wraps the needle tube and the blades; The flexible electronic material patch is arranged outside the free end face of the needle head housing and includes a positive electrode and a negative electrode with a certain distance that can be attached to the skin surface; The vibration control part includes two rotating pairs controlled by motors, two transmission rods, a connecting part of the blade on both sides of the needle tube, a central push rod, a linkage device, and a program control part; each side of the rotating pair includes a gear transmission or a worm and worm gear transmission structure, which can convert the rotational motion of the motor into a linear motion in one direction, thereby controlling the forward or backward movement of the unilateral blade, and the movements of the blades on both sides are not synchronized; the central push rod controls the forward or backward movement of the needle tube; the linkage device connects and binds the central push rod and the transmission rods on both sides and advances or retreats together; the program control part can control the advancing distance of the blade and the needle tube; The needle tube and the blades on both sides present four intermediate states during the puncture process: First, side A vibrates, side B moves forward, and the needle tube is stationary; Second, the needle tube moves forward, and side A moves backward; Third, side B vibrates, side A moves forward, and the needle tube is stationary; Fourth, the needle tube moves forward, and side B moves backward; According to the forward direction of forward or backward movement, cycle through the four intermediate states to make the needle tube continuously advance or retreat during the relative movement process; after each cycle is executed, the relative distance between the needle tube and the blades on both sides remains unchanged.

2. The painless puncture needle according to claim 1, characterized in that, The TENS adjustable electrical stimulation power supply is a transcutaneous electrical nerve stimulation current source with adjustable frequency, variable pulse width, and adjustable current.

3. The painless puncture needle according to claim 1, characterized in that, The needle tube includes a pointed head, and several annular grooves are opened on the side wall.

4. The painless puncture needle according to claim 1, characterized in that, The blades are designed by imitating the patterns, intervals, and blade arcs of the edges of the mosquito mandible mouthparts, and include a three-way edge opening design with uneven intervals.

5. The painless puncture needle according to claim 3, characterized in that, The widths, intervals, and depths of the annular grooves are different. Starting from the free end point of the puncture needle head housing, the ratio of the width b is 1:2:3, the ratio of the depth h is 5:6:8, and the ratio of the interval d is 7:13:

17.

6. The painless puncture needle according to claim 4, characterized in that, The edge interval starts from the free end point of the blade and conforms to the ratio of 7:13:17 of the edge of the mosquito mandible in the bionic structure.

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