Retaining structure in an implantation tool and implantation tool

Abstract

The present application relates to the technical field of medical devices, in particular to a retreat prevention structure in an implantation tool, which comprises a shell, a pushing member and a retreat prevention member; the pushing member is located in the shell and is buckled with the shell, the pushing member has a first position buckled on the shell and a second position after being moved from the shell; the retreat prevention member is located in the shell; a rotation driving member is arranged in the shell, which is arranged corresponding to the retreat prevention member, to drive the retreat prevention member to rotate after the pushing member is moved from the buckle, so that the retreat prevention member is dislocated with the pushing member, and the pushing member is limited to move back from the second position to the first position by the retreat prevention member. Meanwhile, an implantation tool is also provided. The retreat prevention structure in the implantation tool and the implantation tool can reduce the processing and manufacturing difficulty, and can more stably limit the back movement of the pushing member.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a stop structure in an implantation tool and the implantation tool itself. Background Technology

[0002] An implantable continuous glucose monitoring (ICM) system is used to monitor blood glucose levels in the human body. By inserting a sensor into the subcutaneous tissue, it can achieve real-time dynamic monitoring of blood glucose levels. An ICM system only requires one sensor implantation and connects via Bluetooth to continuously monitor blood glucose data, eliminating the pain of needle pricks required by traditional blood glucose meters and overcoming the cumbersome operation of traditional blood glucose meters that can only monitor blood glucose once per use.

[0003] For dynamic implantable continuous glucose monitoring systems, the implantation tool for the sensor is an essential device, which allows the sensor to be implanted into the human body simply and quickly.

[0004] Existing implantation tools typically include a housing, a projector, a transmitter, a sensor, and an implantation needle. The projector is snapped into the housing, and the transmitter, sensor, and implantation needle are all mounted on the projector. When the user uses the implantation tool, the projector disengages from the housing, and a drive spring moves the projector, which in turn moves the transmitter, sensor, and implantation needle synchronously. Once the projector has moved a certain distance, the implantation needle pierces the patient's body, thus delivering the sensor into the subcutaneous tissue.

[0005] To avoid the reuse of implantation tools and for safety reasons, existing implantation tools incorporate a spring arm on the ejector component. When the ejector component disengages from the housing and moves a certain distance, the spring arm extends outward. The structure on the housing blocks the spring arm, thus preventing the ejector component from returning to its initial position. This avoids the reuse of the implantation tool and also prevents the implantation needle from being exposed after use, thus preventing accidental injury and improving safety.

[0006] However, existing technologies employ a method of mounting a projectile arm on the launcher. From the moment the launcher begins to move, the projectile arm experiences sliding resistance and friction, thus placing high demands on its dimensional accuracy. Furthermore, the projectile arm cannot be too thick; excessive recoil force would deform it, thereby compromising its ability to protect against accidental injury. Summary of the Invention

[0007] Existing technologies that use a spring arm on the ejector to restrict its retraction suffer from several drawbacks. These drawbacks include high dimensional accuracy requirements for the spring arm, significant manufacturing difficulties, and the spring arm's susceptibility to deformation under stress, resulting in ineffective retraction control and lingering safety hazards. This invention provides a retraction-stopping structure for an implantation tool. This structure includes a retraction-stopping element, and a rotating drive on the housing to rotate the retraction-stopping element. When the ejector disengages and moves, the rotating drive rotates the retraction-stopping element, causing it to misalign with the ejector. This misaligned retraction-stopping element effectively restricts the ejector's retraction. This structure eliminates the need for a spring arm on the ejector, reducing manufacturing complexity. Furthermore, the misaligned retraction-stopping element can withstand greater retraction forces, ensuring better control over the ejector's retraction.

[0008] A back-stopping structure for an implantation tool includes a housing, a pusher, and a back-stopping element;

[0009] The ejector is located in the housing and is snapped to the housing. The ejector has a first position snapped onto the housing and a second position after being disengaged from the housing.

[0010] The anti-reverse component is located within the housing;

[0011] A rotation drive is provided inside the housing, which is configured to correspond to the anti-reverse member. After the ejector is disengaged and moved, the rotation drive drives the anti-reverse member to rotate, so that the anti-reverse member is misaligned with the ejector, thereby restricting the ejector from moving back from the second position to the first position.

[0012] Preferably, the anti-reverse member is snapped together with the ejector member, and an elastic member is provided between the anti-reverse member and the ejector member, the elastic member being used to drive the anti-reverse member to move back from the second position to the first position;

[0013] The rotation drive is used to drive the anti-reverse member to rotate when the anti-reverse member moves backward.

[0014] Preferably, the anti-reverse member is provided with a rotating structure that cooperates with the rotating drive member, wherein one of the rotating structure and the rotating drive member is an inclined structure, and the other is a bone block that can slide along the inclined structure.

[0015] Preferably, the rotating structure is an inclined structure, and the anti-reverse component includes a cap base and a cap head disposed on the top of the cap base. Two cap heads are symmetrically arranged, and each cap head is provided with the inclined structure. The bone block corresponds one-to-one with the inclined structure.

[0016] Preferably, a mating structure is provided between the anti-reverse member and the ejector member. The mating structure includes a vertically arranged guide groove and an anti-reverse bone that matches the guide groove. The guide groove is provided on one of the anti-reverse member and the ejector member, and the anti-reverse bone is provided on the other of the anti-reverse member and the ejector member.

[0017] When the anti-reverse component is fastened onto the ejector component, the anti-reverse bone is inserted into the guide groove;

[0018] The rotation drive is used to drive the anti-reverse member to rotate after the anti-reverse bone slides out of the guide groove when the anti-reverse member moves back, so that the anti-reverse bone and the guide groove are misaligned.

[0019] Preferably, the guide groove or the anti-reverse bone is formed on the outer periphery of the anti-reverse member.

[0020] Preferably, the housing is provided with a guide groove for guiding the rotation of the anti-reverse member, and the rotation drive member is disposed on the groove wall of the guide groove.

[0021] Preferably, the drive button on the housing is provided with a positioning boss, which is used to restrict the anti-reverse member from rotating back after being driven to rotate by the rotation drive member.

[0022] Preferably, the anti-retraction component is a needle cap in the implantation tool used to drive the implantation needle to retract, and the elastic component is a needle retraction spring.

[0023] An implantation tool comprising a backstop structure, a transmitter, a sensor, and an implantation needle as described in any of the preceding implantation tools;

[0024] The launcher can be detachably mounted on the launcher;

[0025] The sensor is mounted on the transmitter;

[0026] The implanted needle is disposed on the pusher and passes through the sensor.

[0027] Compared with the prior art, the anti-retraction structure in the implantation tool provided by the present invention includes a housing, a propellant, and an anti-retraction component. The propellant is located in the housing and is snap-fitted to the housing. The propellant has a first position snapped onto the housing and a second position after being disengaged from the housing. The anti-retraction component is located in the housing. A rotation drive is provided inside the housing, corresponding to the anti-retraction component, to drive the anti-retraction component to rotate after the propellant is disengaged, so as to misalign the anti-retraction component with the propellant, thereby restricting the propellant from retracting from the second position to the first position. The anti-retraction structure in the implantation tool drives the anti-retraction component to rotate, thereby misaligning the anti-retraction component with the propellant, thus blocking the propellant and restricting its retraction. This type of anti-retraction structure can withstand greater retraction force and can more stably restrict the retraction of the propellant. In addition, this type of structure eliminates the need for a spring arm on the ejector to stop the recoil, thereby reducing the difficulty of processing and manufacturing. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A top view of a backstop structure in an implantation tool provided in one embodiment;

[0030] Figure 2 For along Figure 1 The sectional view along direction AA shown (when neither the ejector nor the anti-reverse component has disengaged);

[0031] Figure 3 For along Figure 1 The sectional view along direction AA shown (when the ejector and the stopper are disengaged and the stopper is not rotating).

[0032] Figure 4 A three-dimensional structural schematic diagram of a backstop component provided in one embodiment;

[0033] Figure 5 A three-dimensional structural schematic diagram of a propellant provided in one embodiment;

[0034] Figure 6 A three-dimensional structural diagram of a stopper and a pusher provided in one embodiment (when the stopper and the pusher are separated and the stopper is not rotating);

[0035] Figure 7 A three-dimensional structural diagram of a retaining member and a pushing member provided in one embodiment (after the retaining member and the pushing member are separated, and after the retaining member is rotated).

[0036] Figure 8 A three-dimensional structural schematic diagram of the housing provided in one embodiment;

[0037] Figure 9 A three-dimensional structural diagram of the anti-retraction structure in an implantation tool provided in one embodiment, after cross-section.

[0038] Figure 10 for Figure 9 A magnified view of a portion of region B shown;

[0039] Figure 11 A partially sectional top view of the drive button, housing, and anti-reverse component provided in one embodiment;

[0040] Figure 12 Top view of an implantation tool provided in one embodiment;

[0041] Figure 13 For along Figure 12 A cross-sectional view along the CC direction (when not in use);

[0042] Figure 14 For along Figure 12 The cross-sectional view shown in the CC direction (after use);

[0043] Explanation of reference numerals in the attached figures:

[0044] The implantation tool includes a backstop structure 100, a housing 10, a rotation drive component 11, a limiting arm 12, a guide groove 13, a groove wall 131, a drive button 14, a positioning boss 141, a drive spring 15, a pusher component 20, a snap-fit ​​spring arm 21, a backstop bone 22, a backstop component 30, a rotation structure 31, a guide groove 32, a cap base 33, a cap head 34, a positioning block 341, a step portion 342, an elastic component 40, a pressure needle tube 50, a spiral groove 51, a conversion tube 60, and an insertion block 61.

[0045] Transmitter 200;

[0046] Sensor 300;

[0047] 400 needles were implanted. Detailed Implementation

[0048] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] It should be noted that when a component is referred to as "mounted on", "fixed on", or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0050] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0051] This invention provides a retraction prevention structure for an implantation tool, comprising a housing, a propellant, and a retraction prevention member. The propellant is located within the housing and is snap-fitted to the housing. The propellant has a first position snapped onto the housing and a second position after disengaging from the housing. The retraction prevention member is located within the housing. A rotation drive is disposed within the housing, corresponding to the retraction prevention member, and is used to drive the retraction prevention member to rotate after the propellant has disengaged, thereby misaligning the retraction prevention member with the propellant and restricting the propellant from retracting from the second position to the first position. The retraction prevention structure in the implantation tool, by driving the retraction prevention member to rotate, causes the retraction prevention member to misalign with the propellant, thus blocking the propellant and restricting its retraction. This type of retraction prevention structure can withstand greater retraction forces and more stably restricts the retraction of the propellant. Furthermore, this structure eliminates the need for a spring arm on the propellant for retraction prevention, thereby reducing manufacturing difficulty.

[0052] Please refer to the following: Figures 1 to 7In one embodiment, a backstop structure 100 is provided in an implantation tool, which mainly addresses the problems of poor effectiveness in limiting the retraction of the pusher component in existing implantation tools and the high difficulty in manufacturing. The backstop structure 100 in the implantation tool is provided with a backstop component. After the pusher component disengages and moves, the backstop component rotates, causing the backstop component and the pusher component to misalign, thereby allowing the backstop component to block the pusher component and restrict its retraction.

[0053] The anti-retraction structure 100 in the implantation tool includes a housing 10, a ejector 20, and an anti-retraction component 30. The ejector 20 is located within the housing 10 and is snap-fitted to the housing 10. The ejector 20 has a first position snapped onto the housing 10 and a second position after being disengaged from the housing 10. It should be noted that in this embodiment, "snap-fitting" refers to a connection between two components via a corresponding snap-fit ​​structure, allowing the two components to separate in a given state. The first position is the position of the ejector 20 when the implantation tool is not in use, at which point the ejector 20 is snapped onto the housing 10. The second position is the position of the ejector 20 after the implantation tool has been used, at which point the ejector 20 has disengaged from the housing 10 and moved a certain distance under the influence of a drive spring. For example, as... Figure 2 and Figure 3 As shown, the first position is Figure 2 The position of the ejector 20 described above, and the second position is... Figure 3 The position of the ejector 20 described in the text.

[0054] The anti-retraction member 30 is located within the housing 10, and a rotation drive member 11 is disposed within the housing 10, corresponding to the anti-retraction member 30. Specifically, the rotation drive member 11's position within the housing 10 corresponds to the anti-retraction member 30, allowing the rotation drive member 11 to contact the anti-retraction member 30 when it is in a specific position, thereby controlling the position of the anti-retraction member 30. The rotation drive member 11 drives the anti-retraction member 30 to rotate after the ejector member 20 disengages, causing the anti-retraction member 30 to misalign with the ejector member 20, thus restricting the ejector member 20 from retracting from the second position to the first position.

[0055] In other words, the rotation drive 11 will only drive the anti-reverse member 30 to rotate after the ejector 20 has disengaged from the housing 10. By driving the anti-reverse member 30 to rotate by a certain angle, the rotation drive 11 causes a certain degree of misalignment between the anti-reverse member 30 and the ejector 20 in the circumferential direction, resulting in interference between them. This prevents the ejector 20 from retracting further towards the first position. For example, as... Figure 3 As shown, the anti-reverse member 30 is used to block and restrict the upward retraction movement of the pusher member 20.

[0056] By using the anti-retraction component 30 to restrict the retraction of the injection component 20, the secondary use of the implantation tool can be avoided, and the implantation needle can be prevented from being exposed after use, thus preventing accidental injury and improving safety.

[0057] Understandably, existing implantation tools use a spring arm on the ejector component to restrict its retraction. When the implantation tool is not in use and the ejector component is secured to the housing, the spring arm is compressed inward by the inner wall of the housing. After the implantation tool is used, the spring arm extends outward after the ejector component moves a certain distance, and the structure on the housing blocks the spring arm, limiting the ejector component's retraction. However, the spring arm experiences sliding resistance and friction from the moment the ejector component begins to move, placing high demands on the dimensional accuracy of the spring arm and making manufacturing difficult. Furthermore, the spring arm cannot be too thick, resulting in a smaller force it can withstand. If the retraction force on the spring arm is too great, it will deform, losing its restraining function on the ejector component, thus rendering the implantation tool ineffective in preventing accidental injury.

[0058] The anti-retraction structure 100 in the implantation tool provided in this embodiment uses the rotation drive 11 to cooperate with the anti-retraction member 30. By driving the anti-retraction member 30 to rotate, the anti-retraction member 30 and the pusher member 20 are misaligned, thereby blocking the pusher member 20. This reduces the manufacturing difficulty, and the misaligned anti-retraction member 30 can limit the pusher member 20 to withstand a greater retraction force, which can better ensure the restriction of the pusher member 20's retraction. At the same time, the overall structure will not affect the normal use of the implantation tool.

[0059] Preferably, in one embodiment, the anti-retractor 30 is snap-fitted to the ejector 20, and an elastic element 40 is provided between the anti-retractor 30 and the ejector 20. The elastic element 40 is used to drive the anti-retractor 30 to move back from the second position to the first position, and the rotation drive 11 is used to drive the anti-retractor 30 to rotate when it moves back. Here, the elastic element refers to a component made of elastic material that can deform under external force and return to its initial state after the external force is reduced or eliminated. That is, in this embodiment, the elastic element 40 provides power to drive the anti-retractor 30 to move, and during the movement of the anti-retractor 30, the rotation drive 11 drives the anti-retractor 30 to rotate, thereby causing the anti-retractor 30 to rotate. Here, "moving back from the second position to the first position" only refers to the direction of movement. That is, the elastic element 40 driving the anti-reverse element 30 to move back from the second position to the first position means that the elastic element 40 drives the anti-reverse element 30 to move back from the direction of the second position to the direction of the first position (e.g., ...). Figure 3 As shown (in the upward retraction movement), the elastic element 40 is not limited to simply moving the stop element 30 back to the first position, but can move past the first position. In the initial state, the stop element 30 is snapped into the ejector 20, and the elastic element 40 is in a compressed state. When the ejector 20 disengages and moves to the second position, the stop element 30 moves synchronously with the ejector 20. After moving a certain distance, the elastic element 40 begins to extend, thereby driving the stop element 30 back, causing the stop element 30 to disengage from the ejector 20. After the stop element 30 retracts a certain distance, the rotation drive 11 contacts the stop element 30, causing the stop element 30 to rotate, thus misaligning the stop element 30 with the ejector 20. The stop element 30 blocks the ejector 20 from above, preventing the ejector 20 from retracting further. Of course, in other embodiments, the location and specific connection structure of the anti-retraction member 30 can be selected according to actual needs. It is not necessarily required to be snapped onto the pusher 20 and driven by the elastic member 40. It is sufficient that when the pusher 20 is disengaged and moves, the rotation drive member 11 drives the anti-retraction member 30 to rotate, thereby restricting the pusher 20 from retraction. In this embodiment, by snapping the anti-retraction member 30 onto the pusher 20 and driving it with the elastic member 40, the reliability of the position of the anti-retraction member 30 when the implantation tool is not in use can be improved, and the anti-retraction member 30 can also be stably driven to move and rotate.

[0060] Please refer to the following: Figure 13 and Figure 14 Specifically, in one embodiment, the ejector 20 is provided with a latching spring arm 21, and the anti-reverse member 30 is disposed on the inner side of the latching spring arm 21. The ejector 20 uses the latching spring arm 21 to latch the anti-reverse member 30 onto the ejector 20 and compress the elastic member 40. When the ejector 20 is in the first position, the outer side of the latching spring arm 21 is pressed by the limiting arm 12 on the housing 10, preventing the latching spring arm 21 from swinging outward, thereby stably latching the anti-reverse member 30 onto the ejector 20 and stably compressing the elastic member 40. When the ejector 20 disengages and moves a certain distance, the latching spring arm 21 separates from the limiting arm 12, thus freeing the outward swing of the latching spring arm 21. At this point, the elastic element 40 drives the anti-reverse element 30 to retract, squeezing the latching spring arm 21 outward and causing the anti-reverse element 30 to disengage from the ejector 20. When the anti-reverse element 30 moves a certain distance, the rotation drive 11 guides and drives the anti-reverse element 30 to rotate, causing the anti-reverse element 30 to misalign with the ejector 20 in the circumferential direction, thereby blocking the ejector 20 from above. Due to the obstruction of the anti-reverse element 30, applying force from below the ejector 20 cannot cause it to retract.

[0061] Please continue reading. Figures 1 to 7 Preferably, in one embodiment, the anti-reverse member 30 is provided with a rotating structure 31 that cooperates with the rotating drive member 11. One of the rotating structure 31 and the rotating drive member 11 is an inclined surface structure, and the other is a bone block that can slide along the inclined surface structure. That is, when the rotating structure 31 is an inclined surface structure, the rotating drive member 11 is a bone block; when the rotating structure 31 is a bone block, the rotating drive member 11 is an inclined surface structure. In this embodiment, through the cooperation between the bone block and the inclined surface structure, the rotation of the anti-reverse member 30 can be driven by the force of the elastic member 40 moving the anti-reverse member 30, without needing to apply additional rotational force to the anti-reverse member 30. When the elastic member 40 drives the anti-retraction member 30 to retract, the rotating structure 31 on the anti-retraction member 30 comes into contact with the rotating drive member 11, and the bone block slides along the inclined structure, thereby guiding the anti-retraction member 30 to rotate, converting the linear movement of the anti-retraction member 30 into movement while rotating.

[0062] Specifically, in one embodiment, the rotation drive 11 is a bone block fixedly disposed within the housing 10, and the rotation structure 31 is an inclined structure formed on the anti-retraction member 30. This structural design reduces manufacturing difficulty, requiring only the addition of a bone block within the housing 10, without the need for additional protruding inclined structures.

[0063] Specifically, in one embodiment, the rotating structure 31 is disposed on the top of the anti-reverse member 30, which can reduce the processing difficulty and also allow the anti-reverse member 30 to contact the rotating drive member 11 earlier, ensuring that the elasticity of the elastic member 40 can drive the anti-reverse member 30 to rotate.

[0064] Preferably, in one embodiment, multiple rotating structures 31 are sequentially spaced along the circumference of the anti-reverse member 30, and each rotating structure 31 corresponds to one rotating drive member 11. By arranging multiple rotating structures 31 and multiple rotating drive members 11 in the circumferential direction to cooperate, the force on the anti-reverse member 30 can be made more stable when it is driven to rotate. Specifically, in one embodiment, two rotating structures 31 are provided on the anti-reverse member 30, and two rotating drive members 11 are correspondingly provided on the housing 10.

[0065] Preferably, in one embodiment, a mating structure is provided between the anti-retraction member 30 and the ejector member 20. The mating structure includes a vertically arranged guide groove 32 and an anti-retraction rib 22 that matches the guide groove 32. The guide groove 32 is disposed on one of the anti-retraction member 30 and the ejector member 20, and the anti-retraction rib 22 is disposed on the other of the anti-retraction member 30 and the ejector member 20. That is, when the guide groove 32 is disposed on the anti-retraction member 30, the anti-retraction rib 22 is disposed on the ejector member 20; when the guide groove 32 is disposed on the ejector member 20, the anti-retraction rib 22 is disposed on the anti-retraction member 30. When the anti-retraction member 30 is engaged with the ejector member 20, the anti-retraction rib 22 is inserted into the guide groove 32. The rotation drive 11 is used to rotate the stop member 30 when the stop member 30 retracts, after the stop bone 22 slides out of the guide groove 32, so that the stop bone 22 and the guide groove 32 are misaligned. That is, in one embodiment, after the elastic member 40 drives the stop member 30 to retract, the stop member 30 and the ejector 20 move relative to each other. After the stop bone 22 exits from the guide groove 32, the rotation drive 11 then contacts the stop member 30. The guide groove 32 and the stop bone 22 provide circumferential positioning for the stop member 30 and the ejector 20, requiring them to be circumferentially aligned for relative insertion. In addition, the rotation of the stop member 30 also serves to block the ejector 20.

[0066] Preferably, in one embodiment, the guide groove 32 or the anti-reverse bone 22 is formed on the outer periphery of the anti-reverse member 30, thereby further reducing the processing and manufacturing difficulty.

[0067] Specifically, in one embodiment, the anti-reverse member 30 includes a cap base 33 and a cap head 34 disposed on the top of the cap base 33, the guide groove 32 is formed on the outer periphery of the cap base 33, and the rotating structure 31 is formed on the cap head 34.

[0068] In one embodiment, two caps 34 are symmetrically arranged, and each cap 34 is provided with the inclined structure. More specifically, one side of each cap 34 is obliquely cut to form an inclined cut surface, which is the inclined structure. The bone blocks within the shell 10 correspond one-to-one with the inclined structure.

[0069] Specifically, in one embodiment, the guide groove 32 is formed on the outer periphery of the cap seat 33, and the anti-retraction bone 22 is formed on the ejector 20.

[0070] Please refer to section 2. Figure 3as well as Figure 8 Preferably, in one embodiment, the housing 10 is provided with a guide groove 13 for guiding the rotation of the anti-reverse member 30, and the rotation drive member 11 is disposed on the groove wall 131 of the guide groove 13. By providing the guide groove 13, when the rotation drive member 11 contacts the anti-reverse member 30, it can better guide the anti-reverse member 30 to rotate, preventing the anti-reverse member 30 from swaying. The elastic element 40 drives the anti-retractor 30 to retract. After the anti-retractor 30 moves a certain distance, a portion of the anti-retractor 30 (specifically, a portion of the cap 34) enters the guide groove 13. As the rotation drive 11 contacts the rotation structure 31, the rotation drive 11 generates resistance to the anti-retractor 30, causing the anti-retractor 30 to rotate. The groove wall 131 of the guide groove 13 then abuts against and restricts the outer wall of the anti-retractor 30 (specifically, the outer wall of the cap 34), ensuring that the anti-retractor 30 can only rotate and will not wobble laterally, thus ensuring the stability of the rotation process and the accuracy of the subsequent position of the anti-retractor 30. By using the guide groove 13 within the housing 10 to guide the rotation, the overall processing difficulty can be reduced.

[0071] Preferably, in one embodiment, the anti-retraction component 30 is a needle cap in the implantation tool used to retract the implantation needle, and the elastic component 40 is a needle retraction spring. That is, in this embodiment, the anti-retraction component 30 and the elastic component 40 are not additional structures added to the implantation tool, but rather structures derived from improvements to the existing structure of the implantation tool. Specifically, the needle cap in the needle retraction structure of the implantation tool is improved so that it can not only perform the needle retraction function but also the anti-retraction function. Of course, in other embodiments, the anti-retraction component 30 can be an additional component, or it can be another component in the needle retraction structure of the implantation tool, as long as it can perform the anti-retraction function. This embodiment, through this structural design, does not require adding new structural components to the implantation tool, simplifying the overall structure within the implantation tool. It eliminates the need for additional components to occupy space within the implantation tool, which is beneficial for the design of the internal structure of the implantation tool, and also allows the overall structure of the implantation tool to be more compact and simple.

[0072] Please refer to the following: Figure 4 , Figure 9 and Figure 10Preferably, in one embodiment, the anti-retraction structure 100 in the implantation tool further includes a pressure needle tube 50 and a conversion tube 60. The pressure needle tube 50 is connected to the implantation needle, and the conversion tube 60 is connected to the anti-retraction member 30. The conversion tube 60 is used to unlock and retract the pressure needle tube 50. When the elastic member 40 retracts the anti-retraction member 30, the conversion tube 60, being connected to the anti-retraction member 30, also retracts. During the retraction process, the conversion tube 60 unlocks the pressure needle tube 50 and then moves it. Since the implantation needle 400 is connected to the pressure needle tube 50, it simultaneously retracts the implantation needle 400, thereby achieving automatic needle withdrawal of the implantation needle 400.

[0073] Specifically, in one embodiment, the pressure needle tube 50 has a spiral groove 51, and the conversion tube 60 is provided with a plug 61, which is inserted into the spiral groove 51. When the conversion tube 60 moves, the plug 61 moves along the spiral groove 51, thereby causing the pressure needle tube 50 to rotate, thus unlocking the pressure needle tube 50. Then, the conversion tube 60 drives the pressure needle tube 50 to move for needle withdrawal.

[0074] Specifically, in one embodiment, the conversion tube 60 is snapped onto the anti-retraction member 30, and the conversion tube 60 is provided with a snap-on spring arm. More specifically, in one embodiment, a positioning block 341 is provided at the top of the inner side of the cap 34, and a step portion 342 is provided at the bottom of the inner side of the cap 34. The positioning block 341 is used for positioning the conversion tube 60 during assembly. During assembly, the conversion tube 60 can be inserted into the anti-retraction member 30 from bottom to top, and then positioned by the positioning block 341. The step portion 342 facilitates the anti-retraction member 30 in driving the conversion tube 60 to retract.

[0075] Please refer to the following: Figure 11 Preferably, in one embodiment, the drive button 14 on the housing 10 is provided with a positioning boss 141, which is used to limit the retraction stop 30 from rotating back after being driven to rotate by the rotation drive 11. When the retraction stop 30 rotates under the drive of the rotation drive 11, the positioning boss 141 limits the retraction stop 30, thereby preventing the retraction stop 30 from rotating further, stabilizing the position of the retraction stop 30, and ensuring that the retraction stop 30 limits the pusher 20. For example, as Figure 11As shown, when the rotation drive 11 drives the cap 34 to rotate through the rotation structure 31, the rotation drive 11 is located on the front side of the cap 34 in the circumferential direction, while the positioning boss 141 is located on the rear side of the cap 34. Thus, the rotation drive 11 can restrict the cap 34 from rotating clockwise, while the positioning boss 141 can restrict the cap 34 from rotating counterclockwise. This prevents the anti-reverse member 30 from rotating after it has rotated, thereby ensuring the stability of the position of the anti-reverse member 30 and ensuring that the anti-reverse member 30 can stably block the pusher 20.

[0076] Specifically, in one embodiment, two positioning protrusions 141 are symmetrically arranged, and the two positioning protrusions 141 are arranged corresponding to the two caps 34.

[0077] Please refer to the following: Figures 12 to 14 Meanwhile, in one embodiment, an implantation tool is also provided, which includes a backstop structure 100, a transmitter 200, a sensor 300, and an implantation needle 400. The transmitter 200 is detachably mounted on the pusher 20, the sensor 300 is disposed on the transmitter 200, and the implantation needle 400 is disposed on the pusher 20 and passes through the sensor 300.

[0078] Specifically, in one embodiment, the implantation tool is an implantation tool used in a dynamic implantable continuous glucose monitoring system.

[0079] Specifically, in one embodiment, the pressure needle tube 50 is connected to the implantation needle 400, and the pressure needle tube 50 is rotatably locked onto the transmitter 200. Rotational locking refers to one component being fastened to another component by rotation. Forward rotation of this component locks it to the other component, while reverse rotation unlocks it. The rotational locking can employ any desired structure, such as a threaded structure or a rotating platform structure. In one embodiment, a rotating platform structure is used to achieve rotational locking between the pressure needle tube 50 and the transmitter 200.

[0080] In one embodiment, the implantation tool operates as follows: After pressing the drive button 14 on the housing 10, the ejector 20 disengages from the housing 10. Then, the ejector 20 moves under the influence of the drive spring 15. When the ejector 20 has moved a certain distance, the implantation needle 400 pierces the skin, delivering a portion of the sensor 300 into the subcutaneous tissue. Then, the elastic element 40 moves the stopper 30 back, which simultaneously moves the conversion tube 60. The conversion tube 60 then first rotates the pressure needle tube 50 in the opposite direction, unlocking it from the transmitter 200. Finally, the elastic force of the elastic element 40 moves the stopper 30, the conversion tube 60, and the pressure needle tube. The implanted needle 400 and the 50 retract synchronously, automatically withdrawing the implanted needle 400 from the human body; when the rotating structure 31 on the anti-retraction member 30 contacts the rotating drive member 11, the anti-retraction member 30 rotates, and just as the anti-retraction member 30 is about to rotate, the guide groove 32 separates from the anti-retraction bone 22, and when the anti-retraction member 30 detaches from the pusher member 20, the implanted needle 400 is also completely detached from the human body, so the subsequent rotation of the anti-retraction member 30 will not cause any harm to the human body; when the movement of the anti-retraction member 30 stops, the anti-retraction member 30 will generate a certain retraction height difference (at this time, the needle tip of the implanted needle 400 is completely above the bottom surface of the pusher member 20), and the retraction height difference limits the distance that the pusher member 20 can retract. Because of the circumferential misalignment between the anti-retraction member 30 and the ejector member 20, when the ejector member 20 is retracted, it can only retract to the bottom surface of the anti-retraction member 30 and cannot move upwards. This ensures that the implantation needle 400 is fully retracted above the ejector member 20 and will not be exposed, thereby avoiding accidental injury in the future.

[0081] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A back-locking structure for an implantation tool, characterized in that, Includes the housing, the ejector, and the anti-recoil mechanism; The ejector is located in the housing and is snapped to the housing. The ejector has a first position snapped onto the housing and a second position after being disengaged from the housing. The anti-reverse component is located within the housing; The housing is provided with a rotation drive, which is configured to correspond to the anti-reverse member and drive the anti-reverse member to rotate after the ejector is disengaged and moved, so as to make the anti-reverse member misaligned with the ejector and restrict the ejector from moving back from the second position to the first position by the anti-reverse member. The anti-reverse component is snapped together with the ejector component, and an elastic component is provided between the anti-reverse component and the ejector component. The elastic component is used to drive the anti-reverse component to move back from the second position to the first position. The rotation drive is used to drive the anti-reverse member to rotate when the anti-reverse member moves backward.

2. The anti-retraction structure in the implantation tool according to claim 1, characterized in that, The anti-reverse component is provided with a rotating structure that cooperates with the rotating drive component, wherein one of the rotating structure and the rotating drive component is an inclined structure, and the other is a bone block that can slide along the inclined structure.

3. The anti-retraction structure in the implantation tool according to claim 2, characterized in that, The rotating structure is an inclined structure. The anti-reverse component includes a cap base and a cap head disposed on the top of the cap base. Two cap heads are symmetrically arranged, and each cap head is provided with the inclined structure. The bone block corresponds one-to-one with the inclined structure.

4. The anti-retraction structure in the implantation tool according to claim 1, characterized in that, A mating structure is provided between the anti-reverse member and the ejector member. The mating structure includes a vertically arranged guide groove and an anti-reverse bone that matches the guide groove. The guide groove is provided on one of the anti-reverse member and the ejector member, and the anti-reverse bone is provided on the other of the anti-reverse member and the ejector member. When the anti-reverse component is fastened onto the ejector component, the anti-reverse bone is inserted into the guide groove; The rotation drive is used to drive the anti-reverse member to rotate after the anti-reverse bone slides out of the guide groove when the anti-reverse member moves back, so that the anti-reverse bone and the guide groove are misaligned.

5. The anti-retraction structure in the implantation tool according to claim 4, characterized in that, The guide groove or the anti-reverse bone is formed on the outer periphery of the anti-reverse member.

6. The anti-retraction structure in the implantation tool according to claim 1, characterized in that, The housing is provided with a guide groove for guiding the rotation of the anti-reverse member, and the rotation drive member is disposed on the groove wall of the guide groove.

7. The anti-retraction structure in the implantation tool according to claim 1, characterized in that, The drive button on the housing is provided with a positioning boss, which is used to prevent the anti-reverse member from rotating back after being driven to rotate by the rotation drive member.

8. The anti-retraction structure in the implantation tool according to any one of claims 1 to 7, characterized in that, The retraction stop is a needle cap used in the implantation tool to retract the implantation needle.

9. An implantation tool, characterized in that, Includes the anti-retraction structure, transmitter, sensor, and implantation needle in the implantation tool as described in any one of claims 1 to 8; The launcher can be detachably mounted on the launcher; The sensor is mounted on the transmitter; The implanted needle is disposed on the pusher and passes through the sensor.

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