An implantation tool

Abstract

The present application relates to a kind of implant tools, including main body, first guide channel fixed in the interior of main body, needle pulling device and elastic fixing part.First guide channel has two different cross-sectional dimensions, first cross-sectional dimension and the second cross-sectional dimension greater than first cross-sectional dimension.Needle pulling device is slidably arranged in first guide channel, and can reciprocate in channel.At least one elastic fixing part is circumferentially arranged in needle pulling device, and elastic fixing part is in the region corresponding to first cross-sectional dimension when in first position, and in the region corresponding to second cross-sectional dimension when in second position.The implant tool realizes the stable locking and release function of needle pulling device by the cooperation of guide channel and elastic fixing part, and can effectively improve the safety and smoothness of implanting and pulling needle process.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically to an implantation tool for implanting medical devices. Background Technology

[0002] In blood glucose management based on continuous glucose monitoring (CGM), a sensor needs to be implanted subcutaneously to achieve real-time monitoring of blood glucose levels. Typically, the implantation and removal of the CGM sensor are accomplished using a specialized implantation device. A guide needle is used to insert the sensor subcutaneously, and then the guide needle is removed at an appropriate time. However, existing removal mechanisms still have the following shortcomings in practical use: Firstly, the needle removal mechanism is prone to accidental triggering during daily operation or under external interference, leading to a decrease in operational safety. Secondly, the needle removal process is often not smooth enough, and the user has difficulty controlling it steadily, which increases the risk of patient discomfort and device malfunction. Third, in order to fix and release the needle, many devices have overly complex internal structures, which not only increases manufacturing costs but also increases maintenance difficulty and failure rate.

[0003] Therefore, how to design a needle removal mechanism that meets the requirements of safe and reliable needle removal while also having a simplified structure and avoiding accidental triggering has become a technical problem that urgently needs to be solved in the industry. Summary of the Invention

[0004] To address the problems of accidental triggering, unsmooth needle removal, and complex structure that easily occur during the implantation and removal of existing continuous glucose monitoring (CGM) systems, this invention provides an improved implantation tool that achieves safe and stable fixation of the needle or sensor and rapid and smooth release.

[0005] The implantation tool of the present invention includes a main body and a first guide channel fixed inside the main body. The first guide channel has a first cross-sectional dimension and a second cross-sectional dimension larger than the first cross-sectional dimension, for guiding and restricting the device components under different cross-sectional conditions. A reciprocating needle removal device is provided inside the tool, with at least one elastic fixing part arranged at a circumferential position of the needle removal device. In the first position, the elastic fixing part is located in the area corresponding to the first cross-sectional dimension, allowing the needle removal device to be reliably held and preventing accidental triggering. When switching to the second position, the elastic fixing part moves to the area corresponding to the second cross-sectional dimension, achieving smooth release of the needle, thereby ensuring smooth operation and safety.

[0006] To further ensure effective fixation of the needle-removing device by the elastic fixing part in the first position, the present invention forms a corresponding groove inside the first guide channel. This groove has a size corresponding to the first cross-sectional dimension and can circumferentially accommodate the elastic fixing part. Preferably, the elastic fixing part may include a claw, which engages with the groove when the elastic fixing part is in the first position; when the elastic fixing part is in the second position, the claw extends radially outward to the area corresponding to the second cross-sectional dimension, thereby completely releasing the grip on the needle-removing device. To better achieve the force transition of the claw between different positions, at least one stepped surface is also provided in the groove, and an inclined surface is formed axially in conjunction with the hollow cylindrical first guide channel. During the sliding process of the elastic fixing part, the inner diameter corresponding to the inclined surface gradually increases, causing the radial gripping force of the claw to decrease from strong to weak until it is completely released, thereby making the needle-removing action smoother.

[0007] Inside the needle removal device, the present invention also includes a first elastic component. When the clamping force of the chuck on the needle removal device is completely released, the first elastic component will push the needle removal device and the needle it drives away from the second position, ensuring that the needle can be removed from the implantation area in a timely and smooth manner.

[0008] Furthermore, to achieve automatic or semi-automatic switching from the first position to the second position, this invention also incorporates a propulsion device within the main body. The propulsion device includes a second elastic component and a push block installed within the main body. The elastic fixing part is fixed to the push block and slides along a predetermined trajectory in a second guide channel within the main body. By triggering the device, the push block slides from the first position to the second position, causing the elastic fixing part to move synchronously, thereby enabling the needle removal device to transition from a tightly locked state to a fully released state. This separate design effectively prevents accidental triggering and provides better continuity and stability during use.

[0009] In summary, this invention, by arranging an elastic fixing part that can switch between a first position and a second position within the first guide channel, and in conjunction with a multi-step surface, a first elastic component, and a triggerable propulsion device, achieves the goals of high reliability, effective prevention of accidental triggering, stability, and structural simplification in the needle removal mechanism, greatly improving the safety and ease of operation of the CGM sensor implantation process. This implantation tool is compact and easy to use, meeting the needs of individuals and medical personnel for rapid, safe, and accurate needle implantation and removal. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall external structure of the implantation tool of the present invention; Figure 2 This is an exploded structural diagram of the implantation tool of the present invention; Figure 3 The implantation tool of this invention is along Figure 1A schematic diagram of the longitudinal section along line AA; Figure 4 This is a partial perspective view of the implantable tool component structure of the present invention from the lower side; Figure 5 This is a perspective view of the internal structure of the implantation tool of the present invention from a bottom angle; Figure 6 The implantation tool of this invention is along Figure 1 A schematic diagram of the cross-sectional structure taken from the middle BB line; Figure 7 The implantation tool of this invention is along Figure 6 A schematic diagram of the cross-sectional structure taken from the CC line. Detailed Implementation

[0011] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and preferred structural examples. It should be noted that these embodiments are mainly used to illustrate the technical features and working mechanism of the present invention and do not constitute a substantial limitation on the scope of protection of the present invention. After understanding the technical solution of the present invention, those skilled in the art can replace or modify the shape, material, or local structure of specific components. All equivalent substitutions based on the concept of the present invention should fall within the scope of protection of the present invention.

[0012] See Figure 1 and Figure 2 The implantation tool of the present invention includes a main body 101, the shape of which can be designed as cylindrical, elliptical, or an ergonomic gripping part 102 depending on the usage environment. The main body is cylindrical in shape, with structures at both the top and bottom ends for easy gripping or rotation. A safety lock 104 is provided on the top of the outer shell, which is cap-shaped and consists of a rotating part 105 and a baffle 106 located at the bottom of the rotating part. When the safety lock is rotated to the first position p1, the baffle 106 interferes with the trigger button 107 to prevent accidental activation; when the safety lock is rotated to the second position p2, the trigger button 107 can be pressed normally. To facilitate user rotation for unlocking, the outer periphery of the rotating part 105 is designed with corrugated or toothed anti-slip texture 108. The periphery of the safety lock 104 is also provided with scale markings 109 to indicate the rotation or sliding angle of the outer shell, helping the user to confirm the current locked or unlocked state.

[0013] The bottom of the outer casing is also equipped with a protective cap 111. The user can rotate and remove the protective cap 111 during implantation to expose the guide needle 112 used for implanting the CGM sensor, which is used to puncture the skin.

[0014] like Figure 3As shown, a propulsion device 113 is provided inside the main body. This propulsion device 113 is used to propel the medical device to complete the implantation action after the trigger button 107 is pressed. The propulsion device 113 includes a push block 114 and a second elastic member 115. The trigger device can be a mechanical fastener, a push button, a trigger structure, or other suitable button mechanism. For example, a rotatable latch can be used to restrict the movement of the push block 114. When the user needs to remove the needle, a slight twist or press of the latch will cause the push block 114 to disengage from its original restriction, and the energy stored in the second elastic member 115 will enable a one-time rapid sliding motion.

[0015] In other solutions, more complex forms such as motor drive or electromagnetic release can be used to meet the requirements of precision control, but the core principle is to release the push block 114 so that it can work together with the elastic fixing part 117 to complete the action from clamping to releasing.

[0016] Reference Figures 3 to 5 The tool includes a first guide channel 118 located inside the main body 101, with its cross-section gradually transitioning from a smaller first cross-sectional size to a larger second cross-sectional size; a needle removal device 119 capable of reciprocating within the first guide channel 118; and an elastic fixing part 117 arranged circumferentially around the needle removal device 119, enabling radial locking or release of the needle removal device 119 at different positions (first position and second position). This tool is optimized for subcutaneous implantation and needle removal of continuous glucose monitoring (CGM) sensors, effectively preventing false triggering and ensuring smooth operation and a simple structure when needle removal is required.

[0017] like Figure 3 As shown, the first guide channel 118 is typically a hollow cylinder. (As...) Figure 3 and Figure 6 As shown, the hollow cylinder 140 of the first guide channel 118 is integrally formed with the shell wall 120 of the main body and is connected at the top; the hollow cylinder away from the top connection is suspended in the air, and its end is provided with an opening 121, so that the internally housed components (including the elastic fixing part 117 and the needle removal device 119) can slide out from the opening 121.

[0018] To facilitate the fitting of the elastic fixing part 117, a groove 123 is provided on the inner wall of the guide channel 118. The groove 123 extends axially along the first guide channel 118 and is parallel to the channel's central axis ax in space. One or more grooves 123 can be provided, and each groove 123 is parallel to the others.

[0019] The groove 123 corresponds to the first cross-sectional dimension R1. That is, in the narrower area of ​​the first guide channel 118, the groove 123 provides an embedding space for the claw 124 of the elastic fixing part 117. Once the claw 124 or other elastic components are in this area, a stable clamping effect on the needle pulling device 119 can be achieved.

[0020] The first cross-sectional dimension R1 refers to the distance from any corresponding point on the groove 123 to the center o of the first guide channel 118 on the cross-section of the groove 123. When the cross-section of the groove 123 described in this application is an arc, the first cross-sectional dimension R1 is the radius of the arc; if the cross-section of the groove 123 is a straight line, the distance from each point on the straight line to the center of the circle (i.e., the distance from the apex of the circle to the center of the circle) constitutes a certain range, which is related to the width of the groove 123. Its specific value can be calculated by those skilled in the art based on relevant trigonometric geometric formulas, and will not be elaborated here.

[0021] Furthermore, the grooves 123 are evenly distributed on the arms 120 of the first guide channel 118.

[0022] Furthermore, the depth of the groove 123 at different positions in the axial direction can be different.

[0023] Furthermore, the groove 123 includes at least one stepped surface, which corresponds to the first cross-sectional dimension. The stepped surface gradually increases in cross-sectional dimension along the axial direction of the first guide channel, forming an axially extending inclined surface 125. The inclined surface 125 causes the cross-sectional diameter of the groove 123 to gradually increase away from the connection between the first guide channel 118 and the top. Due to the presence of this inclined surface, the elastic member 117 at the position p3 with a smaller cross-sectional diameter (e.g., Figure 7 (As shown) can firmly hold the needle removal device 119 (such as) Figure 3 (as shown); at the same time, the diameter of the upper end of the inclined surface 125 is set to be smaller than the diameter of the elastic component 117 in the released state, thereby generating an elastic pre-tightening force, so that the claw 124 of the elastic component 117 tightly holds the front end of the needle removal device 119, forming an interference force, which effectively prevents axial acceleration change caused by drops, collisions, etc., thereby avoiding the problem of accidental triggering or the needle removal device 119 detaching from the implantation guide needle 112.

[0024] Furthermore, due to the presence of the inclined plane 125, the first cross-sectional dimension R1 exhibits a continuous change, which is a uniform linear change within a certain numerical range.

[0025] like Figure 3 , Figure 5 and Figure 7 As shown, to achieve a smooth transition from tight clamping to gradual release, the groove 123 may be provided with one or more stepped surfaces 126 in the axial direction ax. The cross-section of the stepped surface 126 has a second cross-sectional dimension R2, which refers to the distance from the center of the cross-section circle to the section line of the stepped cross-section. Unlike the first cross-sectional dimension R1, the second cross-sectional dimension R2 is a jump dimension, and multiple second cross-sectional dimensions R2 can be formed by setting multiple stepped structures.

[0026] Furthermore, the second cross-sectional dimension R2 is greater than the first cross-sectional dimension R1; if multiple second cross-sectional dimensions R2 are provided, the smallest second cross-sectional dimension R2 should also be greater than the largest first cross-sectional dimension R1.

[0027] Through the design of the groove 123 and the stepped surface 126, the present invention achieves an orderly transformation of the needle removal device 119 from "small cross-section tightly holding and locking" to "large cross-section completely releasing" while maintaining a relatively simple overall structure.

[0028] like Figure 3 As shown, the needle removal device 119 can be in the shape of a long and thin shaft as a whole, or in the shape of a sleeve in part. Its outer diameter matches the inner diameter of the first guide channel 118, but still leaves enough sliding clearance.

[0029] In practice, the needle removal device 119 can be integrally formed or composed of multiple sleeves or other components to accommodate sensor guide needles 112 of different specifications.

[0030] The needle removal structure 119 has a needle removal hook 127 inside for connecting with the guide needle 112. The needle removal hook 127 hooks onto the connecting cap 128 on the top of the guide needle 112, which extends downward from the top of the needle removal device 119. The needle removal hook 127 is elastic and can open radially to make room when the guide needle 112 is inserted, and then re-hooks onto the top of the needle removal structure 119. It should be noted that this connection is a one-way connection, that is, when the needle removal device 119 slides upward, the guide needle 112 will also slide upward, and the connecting cap 128 cannot disengage from the needle removal hook 127.

[0031] To ensure the needle can be quickly and smoothly withdrawn after implantation, the present invention includes a first elastic component 129 inside the needle removal device 119. This component is typically a helical spring, leaf spring, or shape memory alloy elastic element. The first elastic component 129 is installed inside the needle removal device 119 and surrounds the needle removal hook 127 and the connecting cap 128. Its function is to eject the needle removal device 119, thereby quickly pulling the sensor implantation needle 112 out of the skin while leaving the sensor in the human skin tissue.

[0032] When the needle removal device 119 is firmly held by the elastic fixing part 117, the first elastic component 129 is in a compressed or pre-tightened state; once the holding force is released, the first elastic component 129 will quickly "push out" the needle removal device 119 along the guide channel 118.

[0033] like Figure 4As shown, the elastic fixing component 117 is disposed on the pushing block 114. The pushing block 114 is generally cylindrical and has a generally closed bottom 1141. The elastic fixing component 117 includes an annular base plate 131 fixed on the bottom. The base plate 131 is connected to the bottom by a plurality of reinforcing ribs 132.

[0034] The elastic fixing component 117 can be a plurality of independent claws 124 evenly distributed circumferentially on the annular base plate 131, or it can be an integrally formed annular structure, or it can be a structure connected to the base plate 131 through an assembly structure. The claws 124 can generate elastic deformation in the radial direction. When the needle removal device 119 is ejected, the claws 124 elastically give way, and then the independent claws 124 elastically return to their original position after the needle removal device 119 is ejected by the spring.

[0035] When multiple jaws 124 are used, each jaw 124 can deform independently in the radial direction to adapt to changes in the groove 123 or the stepped surface 126, thereby ensuring that the needle removal device 119 is uniformly gripped in the first position. It should be noted that inside the groove 123, the jaws 124 grip the needle removal device 119 radially inward, and the jaws 124 produce radially inward elastic deformation. When the jaws 124 slide from the first position p3 (groove 123) to the second position p4 (outside the groove), due to the change in the cross-sectional size of the first guide channel 118 from the first cross-sectional size R1 to the larger second cross-sectional size R2, the jaws 124 return to their radially outward state.

[0036] When the pawl 124 is outside the groove 123, under the pushing action of the needle removal device 119, the pawl 124 can generate a radially outward elastic offset. This elastic offset causes the pawl 124 to rotate radially outward by a certain angle. After the needle removal device 119 ejects the pawl 124, the pawl 124 elastically resets. This elastic reset causes the annular base plate 131 to rotate radially outward and inward by the same angle.

[0037] In a preferred embodiment, the first position refers to the position of the chuck 124, the needle extraction device 119, and the push block 114 when the implantation tool is in the locked state. In the first position, the chuck 124 is in the groove 123. The first guide channel 118 has a first cross-sectional size, and the chuck 124 is embedded in the area corresponding to the smaller cross-section of the first guide channel 118, thus achieving a tight locking of the needle extraction device 119. This prevents the needle extraction device 119 from accidentally loosening during transportation or initial operation. Furthermore, due to the restriction of the inner wall, the chuck 124 cannot easily expand radially outward, ensuring the stability of the needle extraction device 119.

[0038] In a preferred embodiment, the second position refers to the position of the implantation tool after unlocking, when the push block 114 is pushed out. When an appropriate external force is applied or the trigger mechanism is activated, the elastic fixing part 117 slides to a region with a larger inner diameter of the channel, the claw 124 expands radially outward, releasing the clamping force on the needle removal device 119, and the spring 129 inside the needle removal device 119 pushes the needle removal device 119 upward along the first guide channel 118, so that the needle removal device 119 overcomes the resistance of the claw 124, thereby enabling the needle removal action to be completed smoothly.

[0039] In this embodiment, the axially inclined design of the groove 123 is key to achieving a smooth transition during the needle removal action. When the elastic fixing part 117 passes through the inclined surface 125, the claw 124 gradually overcomes the radial pressure of the inner wall, and the clamping force thus exhibits a continuous change from strong to weak, avoiding the risk of impact or malfunction caused by sudden unlocking.

[0040] In some embodiments, during the movement from the first position to the second position, multiple steps 126 are provided at the end of the groove 123 to reduce the radial dimension jump of each step 126. That is, multiple ramps and steps are combined to allow the needle removal device 119 to gradually reduce the clamping force in multiple stages, thereby obtaining a more flexible release process.

[0041] Figure 3 and Figure 7 The diagram illustrates a second guide channel 311 separately provided inside the main body. This channel is distributed parallel to the first guide channel 118, so that when the push block 114 moves axially, it can be linked with the elastic fixing part 117 in the first guide channel 118. Similarly, the top of the wall 312 of the second guide channel is integrally formed with the top of the main body 101, and the top of the second guide channel 311 is suspended below it.

[0042] An elastic member cavity 314 is formed between the wall of the first guide channel 118 and the wall 312 of the second guide channel. A second elastic member 115 is installed in the cavity 314. The top of the second elastic member 115 abuts against the top of the main body 101, and the bottom of the second elastic member 115 abuts against the bottom of the push block 114.

[0043] In this embodiment, the second elastic component 115 can be a helical spring or a gas spring.

[0044] After the trigger button 107 is pressed, the wall of the push block 114 can slide within the second guide channel 311, thereby driving the second elastic member 115 to move from the first position to the second position. An elastic fixing part 117 can be installed on it by mechanical connection or hinge, so that when the push block 114 is driven by an external force (such as spring force or manual pressing), the elastic fixing part 117 changes position along the first guide channel 118.

[0045] Normally, the push block 114 is held in the first position under the action of the locking or triggering device; when the triggering device is activated, the push block 114 slides to the second position under the driving force of the second elastic member 115, thereby driving the elastic fixing part 117 to cross the inclined plane 123 and gradually release the gripper 124.

[0046] The following describes in detail the method of using the implantation tool of this application: In the initial preparation, the operator checks the implantation tool of the present invention and unlocks the safety lock 104 and the protective cap 111 below to expose the sensor implantation needle 112. At this time, the locking action of the elastic fixing part 117 and the claw 124 prevents the needle removal device 119 from being accidentally loosened.

[0047] During the implantation process, the operator holds the main body 101 and presses the trigger button 107. The second elastic component 115 pushes the block 114, piercing the needle into the target tissue (such as subcutaneous tissue), and the sensor component is then brought into the appropriate position in the human body. During this process, the pushing block 114, the elastic fixing part 117, the needle removal device 119, and the sensor implantation needle 112 move from the first position to the second position, and the CGM device main body 321 is attached to the human skin with medical adhesive.

[0048] Once the sensor positioning is complete and the radial constraint of the needle removal device 119 is released, the elastic force generated by the first elastic component 129 will quickly pull the needle removal device 119 and the needle out from under the skin, while simultaneously pushing the needle removal device 119 away from the elastic fixing part 117. The needle removal device 119 then re-enters the first guide channel 118. At this time, the needle and the needle removal hook 127 also move together, completely leaving the implantation area, while the sensor remains in place to continue performing its monitoring function.

[0049] Compared to traditional implantation tools or needle removal mechanisms, this invention exhibits significant advantages in the following aspects: To avoid accidental triggering: The groove 123 of the first guide channel 118 cooperates with the claw 124 to make the elastic fixing part 117 firmly hold when in the first position, which is not easily triggered by daily minor collisions or drags.

[0050] Smooth needle removal: The beveled transition design makes the deformation process of the 124 chuck smooth, and the radial clamping force gradually decreases, ensuring the smoothness of needle removal and reducing potential damage to the patient's subcutaneous tissue.

[0051] With a simple structure, it is easy to manufacture and assemble: the elastic fixing part 117 and the propulsion device 113 can achieve the locking-releasing function by only needing to process one or more guide channels 118 and grooves 123 in the main body 101. This eliminates the need for complex multiple mechanical couplings or too many parts, significantly reducing manufacturing costs and maintenance difficulty.

[0052] In the design and improvement of medical devices, in addition to the improvement measures listed in this embodiment, those skilled in the art can also make the following improvements or equivalent substitutions for the needle removal device 119 based on the content of this embodiment.

[0053] For example, in addition to ordinary coil springs, disc springs, rubber elastic pads, or shape memory alloy elastic sheets can also be used, as long as they can provide reliable elasticity; the main body can be designed in the form of a pistol grip, a flat curved surface, or a shape with a finger rest according to ergonomic needs to improve the comfort of use; a transparent window can also be set on the outer wall of the main body to observe the movement of the needle removal device 119 in the channel; in some higher standard medical environments, a protective sleeve or cap can be added to the outside of the needle removal device 119 to ensure that the needle is not accidentally exposed during the operation interval, thereby improving safety and sterility; if a more advanced application scenario is required, such as a hospital using intelligent instruments, the triggering device can be combined with electronic circuits so that the needle removal process is automatically completed by the controller according to sensor data or a predetermined program.

[0054] In summary, the implantation tool provided by this invention utilizes an innovative combination of a first guide channel and an elastic fixation part to achieve rapid, stable, and safe implantation and removal of the CGM sensor. The smooth transition between the axial and radial directions of the stepped and inclined surfaces effectively prevents accidental triggering and makes the removal process smoother. This invention has a simple structure, strong applicability, and can meet the dual needs of clinical and personal home use. It also provides a reliable and universal technical solution for the assembly and retrieval of needle-like or thread-like medical devices. Those skilled in the art can modify and equivalently replace the shape, material, or connection method of the various components involved in the embodiments of this invention according to specific application objectives. All modifications or adjustments that do not depart from the technical concept of this invention should be covered within the protection scope of this invention.

Claims

1. An implantation tool, characterized in that, include: main body; A first guide channel is disposed inside the main body, the first guide channel having a first cross-sectional dimension and a second cross-sectional dimension larger than the first cross-sectional dimension; The needle removal device is slidably disposed within the first guide channel and is capable of reciprocating within the first guide channel; At least one elastic fixing part is circumferentially arranged in the needle removal device. The elastic fixing part is located in the region corresponding to the first cross-sectional size in the first position and in the region corresponding to the second cross-sectional size in the second position.

2. The implantation tool according to claim 1, characterized in that, The first guide channel has a groove for circumferentially accommodating the elastic fixing part, and the groove has a cross-section corresponding to the first cross-sectional size.

3. The implantation tool according to claim 2, characterized in that, The elastic fixing part includes a claw. When the elastic fixing part is in a first position, the claw is accommodated in the groove. When the elastic fixing part is in a second position, the claw expands radially outward into the area corresponding to the second cross-sectional dimension.

4. The implantation tool according to claim 3, characterized in that, The groove includes at least one stepped surface, which corresponds to the first cross-sectional dimension.

5. The implantation tool according to claim 4, characterized in that, The first guide channel is in the shape of a hollow cylinder, and the cross-sectional dimension of the stepped surface gradually increases along the axial direction of the first guide channel, forming an inclined surface extending along the axial direction.

6. The implantation tool according to claim 5, characterized in that, When the elastic fixing part is in the first position, the inclined surface forces the claw to radially grip the needle removal device.

7. The implantation tool according to claim 6, characterized in that, When the elastic fixing part slides along the inclined surface from the first position to the second position, the inner diameter of the inclined surface gradually increases, and the radial clamping force of the claw on the needle removal device gradually decreases; when the elastic fixing part slides to the second position, the radial clamping force of the claw on the needle removal device is completely released.

8. The implantation tool according to claim 7, characterized in that, The needle removal device includes a first elastic component. When the clamping force of the chuck on the needle removal device is completely released, the first elastic component pushes the needle removal device and the needle it drives away from the second position.

9. The implantation tool according to claim 8, characterized in that, The needle removal device includes a needle removal hook, and the first elastic member surrounds the needle removal hook and the connecting cap of the needle.

10. The implantation tool according to claim 1, characterized in that, It also includes a propulsion device for advancing the elastic fixing part from the first position to the second position; wherein the propulsion device includes a second elastic component and a push block disposed within the main body; the main body also has a second guide channel for the push block to slide, and a triggering device for triggering the push block to slide from the first position along the second guide channel to the second position.

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