Needle assisting device

Abstract

The invention provides a needle assisting device. The needle assisting device implants the sensor into target tissue through percussion. The needle assisting device comprises a supporting piece, an operating piece and a percussion seat. The proximal end of the support is in contact with the skin of a user. The operating part is arranged around the supporting part and can move relative to the supporting part in the far and near direction. The firing seat moves in a proximal direction relative to the support member in response to the operating member, causing the sensor to be implanted into the target tissue. The operating part can be operated to move from a first position to a second position relative to the supporting part and stop at the second position, and in the first position, relative movement of the operating part relative to the supporting part is insufficient to cause the needle assisting device to be triggered. And at the second position, the operating piece can be operated to move from the second position to the third position relative to the supporting piece, so that the needle assisting device is triggered. According to the percussion mechanism needing to execute two-step operation on the operation piece, most unconscious percussion operation can be filtered out, and therefore the risk that the needle assisting device is accidentally percussed is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of medical device technology, and in particular, to a needle-assist device. Background Technology

[0002] Medical devices that monitor a user's health by implanting sensors into the user's target tissue are known. For example, a continuous tissue fluid glucose monitor monitors glucose in a user's blood tissue fluid by percutaneously implanting a sensor into the user's target tissue. For several reasons, such as the sensors' typically being soft, implantation requires the use of an assist device. The assist device is activated by an operation to implant the sensor into the user's target tissue. To facilitate sensor implantation, the activation of the assist device is usually straightforward, increasing the likelihood of accidental activation. Accidental activation can pose safety risks, such as puncture wounds to the user. Accidental activation can also cause the medical device and / or the assist device to malfunction, resulting in financial loss. Summary of the Invention

[0003] In view of this, the present disclosure provides a needle assist device designed to reduce the risk of accidental firing.

[0004] The needle-implanting device disclosed herein implants a sensor into target tissue via firing. The device includes a support, an operating member, and a firing pin. The proximal end of the support rests on the user's skin. The operating member is partially disposed around the support and is movable relative to the support in a proximal direction. Movement of the operating member relative to the support in the proximal direction causes the firing pin to move proximally, thereby implanting the sensor into the target tissue. The operating member can be operated to move relative to the support from a first position to a second position, where, in the first position, the relative movement of the operating member relative to the support is insufficient to fire the needle-implanting device. In the second position, the operating member can be operated to move relative to the support from the second position to a third position, thereby firing the needle-implanting device.

[0005] Therefore, the user needs to first perform the first step of the operation, moving the actuator from the first position relative to the support to the second position, before performing the second step, moving the actuator from the second position relative to the support to the third position to fire the needle assist device. This firing mechanism, which requires performing a switching operation on the actuator before firing, can filter out most unintentional firing operations, thereby reducing the risk of the needle assist device being accidentally fired.

[0006] Alternatively or supplementally, the direction of movement of the operating element from the first position to the second position is different from its direction of movement from the second position to the third position.

[0007] Because the direction of movement of the actuator from the first position to the second position proximally differs from its direction of movement from the second position to the third position, the operating direction of the first step differs from that of the second step. This difference in operating direction helps to filter out unintentional firing to a greater extent, thereby reducing the risk of accidental firing of the needle assist device.

[0008] Alternatively or supplementally, the operating member can be rotated from a first position relative to the support member in a circumferential direction about an axis to a second position, and can be moved from the second position relative to the support member in a proximal direction to a third position.

[0009] Accordingly, the operating element moves from the first position to the second position through a rotational motion, and then moves from the second position to the third position through a moving motion. Correspondingly, the first step is a rotational operation, and the second step is a pressing operation. The rotational and pressing operations have a significant difference, and the greater the difference in operation, the more effectively unintentional firing can be filtered out, helping to reduce the risk of accidental firing of the needle assist device.

[0010] Alternatively or supplementarily, when the operating member is in the first position, movement of the operating member relative to the support member in the proximal direction is restricted. When the operating member is in the second position, movement of the operating member relative to the support member in the proximal direction is permitted.

[0011] Therefore, when the actuator is in the first position, it will not move proximally even if the user presses it. The user must first rotate the actuator to move it to the second position before pressing it to fire the needle assist device. This eliminates the possibility of firing the needle assist device with a single press. Furthermore, by observing whether the actuator can move proximally relative to the support, the user can determine whether the actuator is currently in the first or second position, further reducing the risk of accidental firing of the needle assist device.

[0012] Alternatively or supplementally, the operating member includes a first abutment portion, and the support member includes a second abutment portion. When the operating member is in a first position, the first abutment portion restricts movement of the operating member relative to the support member in a proximal direction by abutting against the second abutment portion. When the operating member is in a second position, the first abutment portion separates from the second abutment portion to allow movement of the operating member relative to the support member in a proximal direction.

[0013] When the operating member is in the first position, the mutual abutment of the first abutment on the operating member and the second abutment on the support member restricts the movement of the operating member in the proximal direction, thus restricting firing. When the operating member moves to the second position, the first and second abutments separate, allowing the operating member to move in the proximal direction, thus allowing firing. This structure has the advantages of being simple and easy to implement.

[0014] Alternatively or supplementarily, the operating member is fitted onto the outer periphery of the support member. The first abutment includes a protrusion on the inner circumferential surface of the operating member, and the second abutment includes a first guide groove on the outer circumferential surface of the support member. The first guide groove receives the protrusion and has a sealing end and an open end opposite each other in the circumferential direction. The sealing end and the open end are arranged sequentially along the circumferential direction. As the operating member moves from the first position to the second position, the protrusion exits the first guide groove via the open end.

[0015] According to the above structure, a unique guide path is formed between the open end and the closed end of the first guide groove. During the movement of the operating component from the first position to the second position, the protrusion moves along the trajectory defined by the first guide groove; that is, the protrusion moves from the first guide groove towards the open end to the second position. The closed end of the first guide groove ensures that the protrusion cannot continue to move towards the closed end when it comes into contact with it, effectively preventing the user from turning the operating component in the wrong direction. Similarly, during the assembly of the operating component and the support component, the protrusion naturally slides into the first guide groove through the open end, eliminating the need for precise alignment and reducing assembly difficulty.

[0016] Alternatively, a second guide groove is provided on the outer peripheral surface of the support member. The second guide groove extends distally from the opening end of the first guide groove.

[0017] During the assembly of the operating component and the support component, the protrusion can move along the second guide groove. By guiding the protrusion through the second guide groove, the operating component can be quickly assembled into position relative to the support component.

[0018] Alternatively or supplementally, the needle assist device also includes an energy storage element. In a first position, the travel of the operating member relative to the support member is insufficient to cause the energy storage element to release potential energy; in a second position, the travel of the operating member relative to the support member is sufficient to cause the energy storage element to release potential energy, thereby driving the needle assist device to fire.

[0019] When the operating element is in the first position, the user presses it. Even when the operating element reaches the final position, the accumulator remains charged and will not fire. In the second position, the operating element can release the accumulator under user input, thus triggering the device. By limiting and allowing the release of potential energy from the accumulator, accidental firing of the device can be avoided when the operating element is pressed in the first position. Instead, the device can be rotated before being pressed, allowing the device to fire.

[0020] Alternatively or supplementarily, the support member is provided with a positioning part. In a first position and a second position, the movement of the positioning part in the axial direction is restricted, and the positioning part abuts against the firing seat, restricting the movement of the firing seat in the proximal direction to limit the release of potential energy by the energy storage member. In a third position, the movement of the positioning part in the axial direction is permitted, and the energy storage member is allowed to release elastic potential energy.

[0021] When the operating member moves from the first position to the end position, the positioning part abuts against the firing seat to position the firing seat relative to the support member. At this time, the energy storage element is restricted by the firing seat, meaning it is in an energy storage state and will not release potential energy. When the operating member moves from the second position to the third position, the positioning part separates from the firing seat along with the operating member, releasing the positioning of the firing seat. At this time, the firing seat also releases the restriction on the energy storage element, causing the energy storage element to release instantaneously, pushing the firing seat to move proximally along the support member, thus firing the needle assist device.

[0022] Alternatively or supplementally, the firing pin has a third abutment, and the operating member has a fourth abutment. The positioning part positions the firing pin by abutting against the third abutment. As the operating member moves from the first position to the second position via the end position, the positioning part remains abutting against the fourth abutment. As the operating member moves from the second position to the third position, the positioning part separates from the fourth abutment.

[0023] According to the above structure, when the operating member moves to the end position, the continuous contact between the fourth abutment and the positioning member forms a lock, ensuring that the third abutment and the positioning member remain firmly in contact, thereby reliably maintaining the energy storage state of the energy storage member. When the operating member continues to move to the third position, the fourth abutment and the positioning member disengage, simultaneously causing the positioning member to separate from the third abutment, achieving precise interlocking release. Controlling the release of the energy storage member by moving the operating member relative to the support member ensures ease of operation.

[0024] Alternatively or supplementally, the fourth abutment includes a first mating part and a second mating part, which are arranged sequentially in a direction opposite to the circumferential direction, and the top edge of the second mating part is closer to the proximal end of the operating member than the top edge of the first mating part.

[0025] In this implementation, the fourth abutment includes a first mating part and a second mating part. Before the user rotates the operating component, the positioning part engages with the first mating part. Because the top edge of the first mating part is farther from the proximal end of the operating component, even if the operating component is pressed and moved from the first position to the proximal position, the positioning part remains proximal to the top edge of the first mating part, maintaining abutment against it. In other words, before rotating the operating component, direct pressing will not cause the needle assist device to fire. After the user rotates the operating component, the positioning part engages with the second mating part. Because the top edge of the second mating part is closer to the proximal end of the operating component, as the operating component is pressed and moved from the second position to the proximal position, the positioning part moves from proximal to distal to the top edge of the second mating part, disengaging from it. In other words, after rotating the operating component, direct pressing will cause the needle assist device to fire. This implementation has advantages such as simple and compact structure and convenient operation.

[0026] Alternatively or supplementally, the needle assist device also includes an elastic element. The actuating element moves from a first position relative to the support member to a terminated position by receiving a first actuating force in the proximal direction. After the first actuating force is removed, the actuating element is moved from the terminated position to a second position by an elastic restoring force of the elastic element in the distal direction opposite to the proximal direction. The actuating element moves from the second position relative to the support member to a third position by receiving a second actuating force in the proximal direction, thereby causing the needle assist device to fire.

[0027] Accordingly, the firing mechanism is as follows: the first operating force only moves the operating component to the termination position and compresses the elastic element. The operating force must be released to allow the operating component to automatically reset to the second position under the action of the elastic element before the second operating force is applied to complete the final firing. The user needs to operate the operating component twice consecutively in the proximal direction, and also needs to remove the operation in between. This mechanism can more effectively avoid accidental firing.

[0028] Alternatively or supplementally, the actuator is moved proximally relative to the support until the distance between the proximal end of the actuator and the proximal end of the support is less than or equal to the firing distance, causing the needle assist to fire. When the actuator is in the terminated position, the distance between the proximal end of the actuator and the proximal end of the support is greater than the firing distance. When the actuator is in the third position, the distance between the proximal end of the actuator and the proximal end of the support is less than or equal to the firing distance.

[0029] In this way, the first step of the operation, that is, the first press of the operating device, will not cause the needle to fire; the second step of the operation, that is, the second press of the operating device, will cause the needle to fire.

[0030] Alternatively or supplementarily, the operating member is fitted onto the support member. The inner circumferential surface of the operating member has a guided protrusion, and the outer circumferential surface of the support member has a first guide groove and a second guide groove arranged sequentially and interlocking with each other along a circumferential direction. The first guide groove extends proximally as it extends circumferentially. The second guide groove extends distally from the first guide groove as it extends circumferentially. As the operating member moves from a first position to a final position, the guided protrusion moves through the first guide groove to the junction of the first and second guide grooves. As the operating member moves from the final position to a second position, the guided protrusion moves from the junction through the second guide groove and beyond the second guide groove.

[0031] Guided by the first and second guide grooves, the operating member can move from the first position to the termination position under the action of the first operating force, and can leave the second guide groove under the elastic restoring force of the elastic member after the first operating force is removed, thus preparing for firing.

[0032] On the other hand, this disclosure also provides a needle-implanting device. This device implants a sensor into target tissue via firing. The device includes an actuating element that receives a multi-step operation to cause the device to fire.

[0033] Therefore, users need to perform multiple steps separately to fire the needle assist device. This firing mechanism, which requires separate multi-step operations on the operating components, can filter out most unintentional firing operations, thereby reducing the risk of the needle assist device being accidentally fired.

[0034] Alternatively or supplementally, a multi-step operation may include a first step and a second step, wherein the first step and the second step are different operations.

[0035] Because the first and second steps are distinct operations, their execution methods differ. These two steps can only be performed by the user with conscious intent to fire the needle. Therefore, this method helps to further reduce the risk of accidental firing.

[0036] Alternatively or as an alternative, the first step is a rotation operation, and the second step is a pressing operation.

[0037] Therefore, the significant differences between the first and second steps help to further reduce risks.

[0038] Alternatively or supplementally, a multi-step operation may consist of a first step and a second step. The first step and the second step are identical operations.

[0039] Since the first and second steps are two identical operations, the user's operation when firing the needle will have good continuity, which will make the firing operation more convenient.

[0040] Alternatively or supplementally, both the first and second steps involve pressing.

[0041] The needle-fighting device is activated by pressing on both sides, making it more convenient to operate. Attached Figure Description

[0042] It should be understood that the following figures only illustrate certain embodiments of this disclosure and should not be construed as limiting the scope.

[0043] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0044] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0045] Figure 1 This is a schematic diagram of the structure of a medical device according to an embodiment of the present disclosure.

[0046] Figure 2 This is a schematic diagram of the structure of an acupuncture device according to an embodiment of the present disclosure.

[0047] Figure 3 for Figure 2 An exploded view of the needle-aid device.

[0048] Figure 4 yes Figure 3 An exploded view of the needle-aid device body.

[0049] Figure 5 yes Figure 3 The diagram shows the structure of the needle assist device body, where the operating component is located in the first position.

[0050] Figure 6 yes Figure 3 The diagram shows the structure of the needle assist device body, where the operating component is located in the second position.

[0051] Figure 7 yes Figure 3 The diagram shows the structure of the needle assist device body, with the operating component located in the third position.

[0052] Figure 8 yes Figure 3 The image shows a longitudinal sectional view of the needle assist device body, with the operating element located in the second position.

[0053] Figure 9 yes Figure 3 The longitudinal sectional view of the needle assist device body, wherein the operating element is located in the third position.

[0054] Figure 10 yes Figure 3A longitudinal sectional view of the needle-assist device body, in which the first energy storage element is released.

[0055] Figure 11 yes Figure 3 A longitudinal sectional view of the needle-assist device body, in which the second energy storage element is released.

[0056] Figure 12 for Figure 4 A longitudinal sectional view of the operating component.

[0057] Figure 13 for Figure 4 A schematic diagram of the supporting components.

[0058] Figure 14 for Figure 4 A schematic diagram of the firing mechanism.

[0059] Figure 15 for Figure 4 A schematic diagram of the needle-pulling component.

[0060] Figure 16 This is a longitudinal sectional view of the needle assist body according to Modified Example 1, wherein the operating member is located in the first position.

[0061] Figure 17 This is a longitudinal sectional view of the needle assist body according to Modified Example 1, wherein the operating member is located in the termination position.

[0062] Figure 18 This is a longitudinal sectional view of the needle assist body according to Modified Example 1, wherein the operating member is located in the second position.

[0063] Figure 19 This is a longitudinal sectional view of the needle assist body according to Modified Example 1, wherein the operating member is located in the third position.

[0064] Figure 20 To show Figure 16 A schematic diagram of the structure of the fourth abutment part and the positioning part of the needle assist device body.

[0065] Figure 21 To show Figure 17 A schematic diagram of the structure of the fourth abutment part and the positioning part of the needle assist device body.

[0066] Figure 22 To show Figure 18 A schematic diagram of the structure of the fourth abutment part and the positioning part of the needle assist device body.

[0067] Figure 23 To show Figure 19 A schematic diagram of the structure of the fourth abutment part and the positioning part of the needle assist device body.

[0068] Figure 24 The diagram shows the structure of the needle assist body according to Modified Example 2, wherein the operating element is located in the first position.

[0069] Figure 25 The diagram shows the structure of the needle assist body according to Modified Example 2, wherein the operating member is located in the termination position.

[0070] Figure 26 The diagram shows the structure of the needle assist body according to Modified Example 2, wherein the operating element is located in the second position.

[0071] Figure 27 The diagram shows the structure of the needle assist body according to Modified Example 2, wherein the operating element is located in the third position.

[0072] Figure 28 for Figure 24 A partial cross-sectional view of the needle-aid device body.

[0073] Figure 29 for Figure 25 A partial cross-sectional view of the needle-aid device body.

[0074] Figure 30 for Figure 26 A partial cross-sectional view of the needle-aid device body.

[0075] Figure 31 for Figure 27 A partial cross-sectional view of the needle-aid device body. Detailed Implementation

[0076] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0077] Traditional needle-flicking devices are prone to accidental firing.

[0078] To reduce the risk of accidental firing, this disclosure provides a needle assist device. Firing of the needle assist device requires the operating element of the device to receive multi-step operations from the user. Exemplarily, the operating element first needs to receive a first step operation from the user, causing it to move from a first position relative to a support member and stop at a second position. Then, it needs to receive a second step operation from the user, causing it to move from the second position relative to the support member of the needle assist device from the second position to a third position, thereby causing the needle assist device to fire.

[0079] According to the needle assist device provided in this disclosure, the user needs to perform the first step operation on the operating component, moving it from a first position relative to the support to a second position, before performing the second step operation, moving it from a second position relative to the support to a third position, thereby firing the needle assist device. This firing mechanism, which requires multiple steps to activate the operating component, can filter out most unintentional firing operations, thus reducing the risk of accidental firing of the needle assist device.

[0080] The needle assist device according to this disclosure will be described below with reference to specific embodiments and accompanying drawings. For ease of understanding, before introducing the needle assist device according to this disclosure, examples of medical devices to which the needle assist device is applicable will be provided.

[0081] <Example Medical Device> refer to Figure 1 This disclosure provides a medical device 10. The medical device 10 may include a device body 11, a sensor 12, and an attachment 13. The device body 11 is used to house devices such as printed circuit boards. The sensor 12 may have an elongated structure to be suitable for implantation into a user's target tissue. With the aid of the sensor 12 implanted in the target tissue, the medical device 10 can monitor the user's physiological data indicators. The attachment 13 may be adhesive to attach the device body 11 to the patient's skin by adhesion upon contact with the skin.

[0082] Sensor 12 may be flexible. It should be understood that, in this text, the term "flexible" is intended to describe that sensor 204 is relatively soft to be suitable for prolonged placement in tissue, reducing tissue irritation during placement and minimizing user discomfort. Due to its flexibility, sensor 12 is often difficult to insert directly into target tissue on its own and requires implantation with the assistance of a needle applicator.

[0083] In one embodiment, the medical device 10 can be used to monitor analytes in a patient's tissue fluid. Conversely, in other embodiments of this disclosure, the medical device 10 can also be used to monitor other physiological data indicators of the patient.

[0084] <Example Needle Aid Device> refer to Figure 2 This disclosure provides a needle assist device 100. For ease of understanding, the overall structure of the needle assist device 100 will be described below by way of example. It should be noted that the structure of the needle assist device 100 should not be limited to the following description. For example, one or more elements mentioned below may be omitted or replaced, and their layout relationships may be changed.

[0085] refer to Figure 2 and Figure 3The needle assist device 100 may include a needle assist device body 101 and a cover 102. The cover 102 is detachably mounted on the proximal end of the needle assist device body 101 to substantially enclose the internal space of the needle assist device body 101, preventing the internal space from being contaminated by the external environment. In the current embodiment, the medical device 10 is part of the needle assist device 100 and is housed within the internal space of the needle assist device body 101. Conversely, in other embodiments, the medical device 10 may be an additional component separate from the needle assist device 100 and installed onto the needle assist device 100 before use.

[0086] For ease of description, the directional terms “near” and “far” are used in this document to describe elements such as the needle aid body 101 and its components. In this document, during the firing of the needle aid 100 to assist in the implantation of the sensor 204, the end (or side) of an element that is closer to the target tissue is defined as the proximal end (or proximal side), and the end (or side) that is farther from the target tissue is called the distal end (or distal side).

[0087] Taking the needle-aid body 101 as a reference, the direction from its distal end to its proximal end is defined as the proximal direction, and the direction from its proximal end to its distal end is defined as the distal direction. In the attached diagram, the proximal direction is indicated by arrow Z-, and the distal direction is indicated by arrow Z+. The proximal and distal directions can be collectively referred to as the proximal-distal direction.

[0088] refer to Figure 4 The needle assist device body 101 may include an operating component 20, a support component 30, a firing mechanism 40, a needle removal mechanism 50, and a needle assist 60.

[0089] The operating element 20 can receive operations from the user and move proximally relative to the support 30, causing the firing seat 41 to move proximally and drive the sensor 12 to implant into the target tissue. In other words, the user can fire the needle assist device 20 by operating the operating element 20. This disclosure does not impose any particular limitation on the construction of the operating element 20, as long as it can be easily operated. In the current embodiment, the operating element 20 can be a hollow capsule with a proximal opening, serving both as a receiver of operations and as a housing to house at least a portion of the support 30, firing mechanism 40, needle removal mechanism 50, and needle assist device 60.

[0090] The support member 30 provides support for other components. Exemplarily, a portion of the support member 30 may be fitted over the actuating member 20, and the proximal end of the support member 30 may extend beyond the actuating member 20 from its proximal opening, resting on the user's skin. Specifically, during implantation, the proximal end of the support member 30 may be pressed against the user's target tissue to position the needle applicator 100 relative to the target tissue. By way of example only, the support member 30 may be generally cylindrical or at least partially cylindrical. The actuating member 20 may be partially disposed around the support member 30 and is movable relative to the support member 30 in the proximal and distal directions.

[0091] The firing mechanism 40 is used to move the assist needle 60 and the medical device 10 proximally relative to the support 30, causing the assist needle 60 and the sensor 12 housed within the assist needle 60 to penetrate the user's target tissue. In this document, this action performed by the firing mechanism 40, along with the assist needle 60 and the medical device 10, is referred to as firing. Specifically, the firing mechanism 40 may include a firing seat 41. The firing seat 41 responds to the movement of the operating member 20 proximally relative to the support 30, causing the sensor 12 to implant into the target tissue.

[0092] The needle removal mechanism 50 is used to move the auxiliary needle 60 distally after the sensor 12 is implanted, so that the auxiliary needle 60 is quickly pulled out from the target tissue and the sensor 12 is left in the target tissue.

[0093] The assist needle 60 may include a needle head 61 and a connecting portion 62. The needle head 61 is used to insert into the target tissue, while the connecting portion 62 is connected to the needle removal mechanism 50. By way of example only, the needle head 61 may have a semi-enclosed cross-section, thereby forming an internal space for accommodating the sensor 12.

[0094] To reduce the risk of accidental firing, the actuator 20 fires the needle assist device 100 by receiving multiple actions. That is, after obtaining the needle assist device 100, if the user performs only one action on the actuator 20, the needle assist device 100 will not fire; it will only fire if the user performs multiple actions, such as two actions. This firing mechanism, which requires multiple actions on the actuator to fire, filters out most unintentional firing attempts, thereby reducing the risk of accidental firing of the needle assist device 100.

[0095] For example, refer to Figures 5 to 7 The operating unit 20 can first receive the first step of the operation from the user, and then... Figure 5 The first position of the middle relative support 30 moves to and stops at Figure 6 The second position relative to the support member 30, and then, through receiving the second step operation, by Figure 6 The second position in the middle is moved to Figure 7 The third position in the process causes the needle assist device 100 to fire. Thus, after obtaining the needle assist device 100, the user needs to perform the first and second steps sequentially on the operating member 20 to move the operating member 20 relative to the support member 30 from the first position through the second position to the third position, thereby causing the needle assist device 100 to fire. This helps to further reduce the risk of accidental firing of the needle assist device 100.

[0096] To further reduce the risk of accidental firing, the first and second steps can be performed differently. This results in the movement direction of the actuator 20 from the first position to the second position in the first step being different from its movement direction from the second position to the third position in the second step. Because the first and second steps are different, their operation methods differ. This difference in operation can only be performed by the user with conscious intent to fire the needle. Therefore, this method helps to further reduce the risk of accidental firing.

[0097] In the current embodiment, the first step can be a rotation operation, and the second step can be a pressing operation. When performing the rotation operation, the user can hold the operating component 20 with one hand and the support component 30 with the other, rotating the operating component 20 relative to the support component 30. This causes the operating component 20 to rotate relative to the support component 30 around an axis S along a circumferential direction (i.e., the Y direction in the figure). Figure 5 The first position in the middle rotates to Figure 6 The second position in the middle. Here, axis S can extend in the proximal direction. When performing the pressing operation, the user can first place the proximal end of the support 30 against the target tissue, and then press the operating member 20 in the proximal direction, so that the operating member 20 is from Figure 6 The second position moves along a proximal direction (i.e., the Z-direction) to... Figure 7 The third position in the process causes the needle assist device 100 to fire. Since there is a significant difference between the rotation operation and the pressing operation, the greater the difference in operation, the more it can filter out unintentional firing operations, thus helping to reduce the risk of the needle assist device 100 being accidentally fired.

[0098] Users may skip the first step and directly perform the second step. To prevent the needle assist device 100 from being accidentally fired in this situation, in the current embodiment, when the operating member 20 is in the first position, the movement of the operating member 20 relative to the support member 30 in the proximal direction is restricted; when the operating member 20 is in the second position, the movement of the operating member 20 relative to the support member 30 in the proximal direction is permitted.

[0099] Therefore, when the operating element 20 is in the first position, even if the user presses the operating element 20, it will not move proximally. The user must first rotate the operating element 20 to move it to the second position before pressing it to fire the needle assist device 100. On the one hand, this eliminates the possibility of firing the needle assist device 100 with a single press. On the other hand, by observing whether the operating element 20 can move proximally relative to the support, the user can determine whether the operating element 20 is currently in the first or second position, which helps to further reduce the risk of accidental firing of the needle assist device 100.

[0100] To limit the movement of the operating member 20 from the first position in the proximal direction, refer to Figure 12 and Figure 13 The operating member 20 may be provided with a first abutment 21, and the support member 30 may be provided with a second abutment 31. For example... Figure 5 As shown, when the operating member 20 is in the first position, the first abutment portion 21 abuts against the second abutment portion 31 in the proximal direction, restricting the movement of the operating member 20 relative to the support member 30 in the proximal direction. When the operating member 20 is in the second position, the first abutment portion 21 separates from the second abutment portion 31, allowing the operating member 20 to move relative to the support member 30 in the proximal direction.

[0101] When the operating member 20 is in the first position, the mutual abutment of the first abutment portion 21 on the operating member 20 and the second abutment portion 31 on the support member 30 restricts the movement of the operating member 20 in the proximal direction, thus restricting firing. When the operating member 20 moves to the second position, the first abutment portion 21 and the second abutment portion 31 separate, allowing the operating member 20 to move in the proximal direction, thus allowing firing. This structure has the advantages of being simple and easy to implement.

[0102] This disclosure does not impose any particular limitations on the construction of the first abutment 21 and the second abutment 22. It is acceptable as long as the first abutment 21 and the second abutment 31 can move proximally relative to the support 30 via the abutment limiting operating member 20. As an example, see [reference needed]. Figure 12 and Figure 13 The first abutment 21 may include a protrusion 21 provided on the inner circumferential surface of the operating member 20, and the second abutment 31 may include a first guide groove 311 provided on the outer circumferential surface of the support member 30. The first guide groove 311 has a sealing end 3111 and an opening end 3112 that are opposite each other in the circumferential direction. The sealing end 3111 and the opening end 3112 are arranged sequentially along the circumferential direction (i.e., the Y direction). Figure 5 and Figure 6 As shown, as the operating member 20 rotates from the first position to the second position, the protrusion 211 leaves the first guide groove 311 through the open end 3112.

[0103] According to the above structure, a unique guide path is formed between the open end 3112 and the blocking end 3111 of the first guide groove 311. During the process of the operating member 20 moving from the first position to the second position, the protrusion 211 moves along the trajectory defined by the first guide groove 311, that is, the protrusion 211 moves to the second position along the first guide groove 311 towards the open end 3112. The blocking end 3111 of the first guide groove 311 ensures that when the protrusion 211 moves towards the blocking section 3111, it comes into contact with the blocking end 3111 and cannot continue to move towards the blocking end 3111. This effectively prevents the user from turning the operating member 20 in the wrong direction.

[0104] Continue to refer to Figure 12 and Figure 13 A second guide groove 312 may also be provided on the outer peripheral surface of the support member 30. The second guide groove 312 extends distally from the open end 3112 of the first guide groove 311. Accordingly, during the assembly process of the operating member 20 and the support member 30, the protrusion 211 can move along the second guide groove 312. By guiding the protrusion 211 with the second guide groove 312, the operating member 20 can be quickly assembled into position relative to the support member 30.

[0105] This disclosure does not impose any particular limitations on the firing mechanism 40. As long as the operating member 20 moves from the second position to the third position, the firing mechanism 40 can move proximally with the assist needle 60 to complete the implantation of the sensor 12. An exemplary implementation of the firing mechanism 40 is given below.

[0106] refer to Figure 4 The firing mechanism 40 may include a firing seat 41, a carrier 42, and an energy storage element 43, all three of which are disposed inside the support 30. The carrier 42 is fixed to the firing seat 41 and is used to releasably carry the medical device 10. Of course, in other examples, the two may also be an integral structure. The energy storage element 43 stores potential energy. In a first position, the stroke of the operating member 20 relative to the support 30 is insufficient to cause the energy storage element 43 to release potential energy. In a second position, the stroke of the operating member 20 relative to the support 30 is sufficient to cause the energy storage element 43 to release potential energy, thereby driving the needle assist device 100 to fire. The needle assist device 100 receives the firing operation, causing the energy storage element 43 to release potential energy. Driven by this potential energy, the firing seat 41, carrying the carrier 42 and the medical device 10, moves proximally, realizing the firing of the needle assist device 100. It is understandable that, in order to distinguish it from the energy storage device 52 mentioned below, the energy storage device 43 can also be referred to as the first energy storage device, and the energy storage device 52 can also be referred to as the second energy storage device.

[0107] refer to Figures 12 to 14The firing base 41 may be provided with a third abutment 411, the operating member 20 may be provided with a fourth abutment 22, and the support member 30 may be provided with a positioning part 32. In the first and second positions, the movement of the positioning part 32 in the axial direction is restricted, and the positioning part 32 abuts against the firing base 41, restricting the movement of the firing base 41 in the proximal direction to limit the release of potential energy by the energy storage member 43. In the third position, the movement of the positioning part 32 in the axial direction is permitted, and the energy storage member 43 is permitted to release elastic potential energy. By way of example only, the third abutment 411 may be provided on the outer peripheral surface of the firing base 41, the fourth abutment 22 may be provided on the inner peripheral surface of the operating member 20, the support member 30 may be provided with a spring arm 33 extending in the proximal direction (i.e., the Z+-Z- direction), and the positioning part 32 may be provided at the free end, i.e., the proximal end, of the spring arm 33.

[0108] The positioning part 32 may be provided with a first working surface 321, and the third abutting part 411 may be provided with a second working surface 412. The positioning part 32 and the third abutting part 411 abut against each other through the first working surface 321 and the second working surface 412. Both the first working surface 321 and the second working surface 412 are sloping surfaces extending radially inward along the proximal direction. The energy storage member 43 applies a force to the firing base 41 in the proximal direction. Since the first working surface 321 and the second working surface 412 are sloping surfaces with the above-described structure, this force, through the abutment of the first working surface 321 and the second working surface 412, gives the spring arm 33 a tendency to deform radially outward.

[0109] After receiving the first step operation and before receiving the second step operation, such as Figure 8 As shown, the operating member 20 is in the second position relative to the support member 30. At this time, the fourth abutment part 22 abuts against the positioning part 32, restricting the elastic deformation of the spring arm 33 in the radial direction, and keeping the positioning part 32 in the position abutting against the third abutment part 411. By abutting against the positioning part 32, the firing seat 41 will be positioned relative to the support member 30 in the near-far direction (i.e., the Z+-Z- direction), so that the energy storage member 43 retains energy storage.

[0110] After receiving the second step operation, the operating component 20 moves towards the support component 30 in a proximal direction. Figure 8 The second position in the middle is moved to Figure 9 The third position in the text. At this time, as... Figure 9 As shown, the positioning part 32 separates from the fourth abutment part 22, allowing the spring arm 33 to elastically deform radially outward. This radially outward elastic deformation of the spring arm 33 causes the positioning part 32 to separate from the third abutment part 411, thereby releasing the positioning of the firing base 41 in the near-far direction, allowing the energy storage element 43 to release its potential energy and drive the firing base 41 towards the near side. Figure 9 Move the position in the middle to Figure 10 The position in the middle is used to fire the needle assist device 100.

[0111] The energy storage element 43 can be an elastic element that stores potential energy through elastic deformation and releases it through elastic recovery. In a specific example, the energy storage element 43 can compress a spring, with its distal end pressing against the operating member 20 and its proximal end pressing against the firing seat 41. To prevent the operating member 20 from separating from the firing seat 41, in a more specific example, refer to... Figure 13 The support member 30 is also provided with a first claw 34. The first claw 34 restricts the operation member 20 from moving relative to the support member 30 from the first position and the second position in the distal direction by abutting against the top of the fourth abutment 22, thereby keeping the energy storage member 43 in a compressed state when the operation member 20 is in the first position and the second position.

[0112] It is understood that the energy storage element 43 is not limited to an elastic element. In a prospective example, the energy storage element 43 may also include two magnetic elements with opposite magnetic poles of the same shape, one of which may be fixed to the operating element 20 and the other magnetic element may be fixed to the firing base 41.

[0113] This disclosure does not impose any particular limitations on the needle removal mechanism 50. It is sufficient that the needle 60 can be quickly removed from the target tissue after the needle assist device 100 is fired. An exemplary implementation of the needle removal mechanism 50 is given below.

[0114] refer to Figure 4 The needle removal mechanism 50 may include a needle removal component 51 and an energy storage component 43. For ease of distinction, the energy storage component 43 may be referred to as the first energy storage component, and the energy storage component 52 may be referred to as the second energy storage component. The needle removal component 51 is connected to the assist needle 60. The second energy storage component 52 stores potential energy. After implantation, the potential energy of the second energy storage component 52 is released. Driven by this potential energy, the needle removal component 51 moves distally, carrying the assist needle 60, thereby removing the assist needle 60 from the target tissue and leaving the sensor 12 of the medical device 10 in the target tissue.

[0115] refer to Figure 12 The operating component 20 may be provided with a cylindrical portion 23. (See reference) Figure 14 The firing seat 41 may be provided with a second pawl 413, and the second pawl 413 has a third operating surface 414, which is a ramp surface that slopes radially outward along the proximal direction. (Reference) Figure 15 The distal end of the needle-pulling member 51 is provided with a fourth working surface 511, which is also a sloping surface inclined radially outward along the proximal direction. The second energy storage member 52 applies a force to the needle-pulling member 51 in the distal direction. Since the third working surface 414 and the fourth working surface 511 are sloping surfaces with the above-described structure, the force causes the second claw 413 to tend to deform radially outward through the abutment of the third working surface 414 and the fourth working surface 511.

[0116] like Figure 8 and Figure 9 As shown, before the needle assist device 100 fires, the second claw 413 is located inside the cylindrical portion 23. At this time, the cylindrical portion 23 binds the second claw 413, restricting its radial outward deformation and holding it in a position abutting against the needle removal member 51. Through this abutment against the second claw 413, the distal movement of the needle removal member 51 is restricted, allowing the second energy storage member 52 to retain its energy.

[0117] like Figure 10 As shown, as the needle assist device 100 is fired, the firing seat 41 moves proximally, and the second claw 413 disengages from the cylindrical portion 23. Freed from the constraint of the cylindrical portion 23, the second claw 413 is able to elastically deform radially outward. This radially outward elastic deformation causes the second claw 413 to separate from the needle removal member 51, thereby releasing the restriction on the distal movement of the needle removal member 51, allowing the second energy storage member 52 to release potential energy and drive the needle removal member 51 distally. Figure 10 Move the position in the middle to Figure 11 The position is such that the 60 needle is pulled out from the target tissue.

[0118] The second energy storage element 52 can be an elastic element that stores potential energy through elastic deformation and releases potential energy through elastic recovery. In a specific example, the second energy storage element 52 can compress a spring, with its distal end pressing against the pin-pulling element 51 and its proximal end pressing against the firing seat 41 or the bearing element 42.

[0119] It is understood that the second energy storage element 52 is not limited to an elastic element. In a prospective example, the second energy storage element 52 may also include two magnetic elements with opposite magnetic poles, one of which may be fixed to the pin-pulling element 51, and the other magnetic element may be fixed to the firing base 41 or the carrier element 42.

[0120] The above description illustrates an example of a needle assist device 100 according to an embodiment of the present disclosure. Below, examples of modified needle assist devices according to the present disclosure will be described. It will be understood that the needle assist devices in the following modifications share many similar or identical elements with the needle assist device 100 described above. For the sake of brevity, similar or identical elements will be omitted by using similar or identical reference numerals.

[0121] <Modification of the needle assist device 1> The needle assist device according to Modification 1 of this disclosure includes a needle assist device body 101a. (See reference...) Figure 16The needle assist device body 101a may include an operating member 20a and a support member 30a. The operating member 20a is activated by sequentially receiving a first step operation and a second step operation, wherein the first step operation is a rotation operation and the second step operation is a pressing operation. That is, the operating member 20a can first receive a rotation operation... Figure 16 The first position in the middle rotates about the axis to Figure 18 The second position in the middle, and then receive the press operation by Figure 18 The second position in the middle moves along the proximal direction to Figure 19 The third position in the middle is used to fire the needle assist device.

[0122] Unlike the aforementioned embodiments, in Modification 1, when in the first position, the operating member 20a is allowed to move proximally relative to the support member 30a, but this will not cause the needle assist device to fire. Accordingly, when the operating member 20a is in the first position, if the user performs a pressing operation on the operating member 20a, although the operating member 20a can move proximally relative to the support member 30a, it will not cause the needle assist device to fire. Only by first performing a rotation operation on the operating member 20a and then performing a pressing operation can the needle assist device be fired. This avoids accidental firing of the needle assist device due to accidental pressing by the user.

[0123] Further, refer to Figure 16 The needle assist device body 101a may also include an energy storage element 43a, which drives the needle assist device to fire by releasing its stored potential energy. The implementation of the energy storage element 43a can be referred to the foregoing embodiments. For the sake of simplicity, it will not be described in detail here. (See reference...) Figure 16 and Figure 17 When the operating element 20a is in the first position, if the user performs a pressing operation on the operating element 20a, as the operating element 20a moves from the first position... Figure 16 The first position moves along the proximal direction to the termination position, and the energy storage member 43a is restricted from releasing potential energy. In Modification 1, the termination position refers to the extreme position of the operating member 20a in the proximal direction, starting from the first position. That is, after the operating member 20a reaches the termination position from the first position along the proximal direction, even if it continues to be pressed, the operating member 20a will not move further in the proximal direction relative to the support member 30b. (Reference) Figure 18 and Figure 19 When the operating member 20a is in the second position, as the operating member 20a moves from the second position to the third position in the proximal direction, the energy storage member 43b releases potential energy, which drives the needle assist device to fire.

[0124] When the operating element 20a is in the first position, even if the user presses it, the energy storage element 43a will not be released when the operating element 20a reaches the end position; the energy storage element 43a remains in an energy-storing state. Therefore, pressing the operating element 20a in the first position will not cause the needle assist device to fire accidentally. When the operating element 20a is in the second position, the operating element 43a can release the energy storage element under the user's operation, thus causing firing. In this way, by limiting and allowing the energy storage element 43a to release potential energy, it is possible to prevent the operating element 20a from being pressed in the first position and thus avoid accidental firing of the needle assist device, and to allow the operating element 20a to be rotated before being pressed, thereby causing the needle assist device to fire.

[0125] Further, refer to Figure 16 The needle assist body 101a may further include a firing seat 41a, and the support member 30a may be provided with a positioning part 32a. The positioning part 32a releasably positions the firing seat 41a to releasably restrict the movement of the firing seat 41a relative to the support member 30a in the proximal direction. The cooperation between the positioning part 32a and the firing seat 41a can be referred to the foregoing embodiments. For the sake of simplicity, it will not be described in detail here. Figure 16 and Figure 17 As shown, as the operating member 20a moves from the first position to the end position, the positioning part 32a positions the firing seat 41a relative to the support member 30a to limit the release of potential energy by the energy storage member 43a. Figures 18 to 20 As shown, as the operating member 20a moves from the second position to the third position, the positioning part 32a releases the firing seat 41a to allow the energy storage member 43a to release potential energy.

[0126] When the operating member 20a moves from the first position to the end position, the positioning part 32a abuts against the firing base 41a to position the firing base 41a relative to the support member 30a. At this time, the energy storage member 43a is restricted by the firing base 41a, that is, the energy storage member 43a is in an energy storage state and will not release potential energy. When the operating member 20a moves from the second position to the third position, the positioning part 32a separates from the firing base 41a as the operating member 20a moves, releasing the positioning of the firing base 41a. At this time, the firing base 41a also releases the restriction on the energy storage member 43a, causing the energy storage member 43a to release instantaneously, pushing the firing base 41a to move proximally along the support member 30a, thereby realizing the firing of the needle assist device.

[0127] Further, refer to Figure 16 The firing base 41a may be provided with a third abutment 411a, and the operating member 20a may be provided with a fourth abutment 22a. The positioning part 32a positions the firing base 41a by abutting against the third abutment 411a. Figure 16 and Figure 17As shown, as the operating member 20 moves from the first position to the end position, the positioning part 32a remains abutting against the fourth abutting part 22a, thereby holding the positioning part 32a in abutting against the third abutting part 411a. Figure 18 and Figure 19 As shown, as the operating member 20a moves from the second position to the third position, the positioning part 32a disengages from the fourth abutment part 22a, allowing the positioning part 32a to release the firing seat 41a by leaving the position abutting the third abutment part 411a.

[0128] According to the above structure, when the operating member 20a moves to the end position, the continuous contact between the fourth abutment part 22a and the positioning part 32a forms a lock, ensuring that the third abutment part 411a and the positioning part 32a remain firmly abutted, thereby reliably maintaining the energy storage state of the energy storage member 43a. When the operating member 20a continues to move to the third position, the fourth abutment part 22a disengages from the positioning part 32a, simultaneously causing the positioning part 32a to separate from the third abutment part 411a, achieving precise interlocking release. The release of the energy storage member 43a is controlled by the movement of the operating member 20a relative to the support member 30a, ensuring ease of operation.

[0129] As a specific implementation method, refer to Figure 20 The fourth abutment 22a may include a first mating part 221a and a second mating part 222a. The first mating part 221a and the second mating part 222a are arranged sequentially in a direction opposite to the circumferential direction Y. Figure 20 As shown, the top edge of the second mating portion 222a is closer to the proximal end of the operating member 20 than the top edge of the first mating portion 221a. In other words, in the distal direction, the top edge of the first mating portion 221a extends beyond the top edge of the second mating portion 222a.

[0130] like Figure 16 and Figure 20 As shown, when the operating member 20a is in the first position, the positioning part 32a abuts against the first mating part 221a. Figure 17 and Figure 21 As shown, when the operating member 20a is in the terminated position, the positioning part 32a is located near the top edge of the first mating part 221a and abuts against the first mating part 221a. That is, as the operating member 20a moves from the first position to the terminated position, the positioning part 32a remains abutting against the first mating part 221a.

[0131] like Figure 18 and Figure 22 As shown, when the operating member 20a is in the second position, the positioning part 32a abuts against the second mating part 222a. Figure 19 and Figure 23As shown, when the operating member 20a is in the third position, the positioning part 32a is located on the far side of the top edge of the second mating part 222a and is separated from the second mating part 222a. That is, as the operating member 20a moves from the second position to the third position, the positioning part 32a passes over the top edge of the second mating part 222a and abuts against the second mating part 222a.

[0132] In this implementation, the fourth abutment 22a includes a first mating part 221a and a second mating part 222a. Before the user rotates the operating member 20a, the positioning part 32a engages with the first mating part 221a. Since the top edge of the first mating part 221a is far from the proximal end of the operating member 20a, even if the operating member 20a is pressed and moved from the first position to the proximal position, the positioning part 32a remains proximal to the top edge of the first mating part 221a, maintaining abutment against it. In other words, direct pressing before rotating the operating member 20a will not cause the needle assist device to fire.

[0133] After the user rotates the operating member 20a, the positioning part 32a engages with the second mating part 222a. Since the top edge of the second mating part 222a is closer to the proximal end of the operating member 20a, as the operating member 20a is pressed and moves from the second position to the proximal direction to the third position, the positioning part 32a will move from the proximal side of the top edge of the second mating part 222a to its distal side, separating from the second mating part 222a. In other words, directly pressing the operating member after rotation will cause the needle ejector to fire.

[0134] This implementation method has advantages such as simple and compact structure and convenient operation.

[0135] <Modification 2 of the needle assist device> The needle assist device according to Modification 2 of this disclosure includes a needle assist device body 101b. (See reference...) Figure 24 The needle assist device body 101b may include an operating member 20b. In Modification 2, the operating member 20b receives a first step operation and a second step operation sequentially, causing the needle assist device to fire, and the first step operation and the second step operation are identical operations. Since the first step operation and the second step operation are two identical operations, the user's operation when firing the needle assist device will have better continuity, which will make the firing operation more convenient.

[0136] Furthermore, both the first and second steps can be pressing operations. Specifically, the user can first place the proximal end of the needle assist device body 101b against the target tissue, and then press the operating member 20b twice in the proximal direction, thereby causing the needle assist device to fire. Firing the needle assist device through two pressing operations makes the firing operation more convenient. Alternatively, in another embodiment, both the first and second steps can be rotating operations. Alternatively, in another embodiment, both the first and second steps can be pulling operations, that is, pulling the operating member 20b distally.

[0137] refer to Figures 28 to 31 The needle assist device body 101b may also include an elastic element 43b. In Variation 2, the elastic element 43b can serve as an energy storage element for the firing mechanism, cooperating with the firing seat 41b and the support member 42b to achieve firing of the needle assist device. The cooperation of the elastic element 43b with the firing seat 41b and the support member 42b can be referred to the previous description of the needle assist device 100. For the sake of brevity, it will not be described again here. Conversely, in another embodiment, the elastic element 43b may also be an additional component independent of the firing mechanism.

[0138] When the user performs the first step, that is, when pressing the operating member 20b for the first time, the user applies a first operating force to the operating member 20b in the proximal direction. Under the action of the first operating force, the elastic member 43b elastically deforms, and the operating member 20b relative to the support member 30b changes from... Figure 24 and Figure 28 Move the first position in the middle to Figure 25 and Figure 29 The termination position refers to the extreme position of the operating member 20b under the first operating force. That is, after the operating member 20b reaches the termination position, even if the first operating force continues to be applied, the operating member 20b will no longer move relative to the support member 30b.

[0139] Next, the user can stop pressing, removing the first operating force applied to the operating member 20b. As the first operating force is removed, the operating member 20b, driven by the elastic restoring force of the elastic member 43b in the distal direction, moves... Figure 25 and Figure 29 The end position in the middle is moved to Figure 26 and Figure 30 The second position in the list.

[0140] Next, the user can perform the second step, namely, pressing the operating member 20b a second time, applying a second operating force in the proximal direction to the operating member 20b. Under the action of the second operating force, the operating member 20b relative to the support member 30b... Figure 26 and Figure 30 The second position in the middle is moved to Figure 27 and Figure 31 The third position in the middle causes the needle to fire.

[0141] Accordingly, the firing mechanism is as follows: the first operating force only moves the operating member 20b to the termination position and compresses the elastic member 43b. The first operating force must be released to allow the operating member 20b to automatically reset to the second position under the action of the elastic member 43b before the second operating force is applied to complete the final firing. The user needs to operate the operating member 40b twice in a proximal direction, and the operating member 20b needs to be removed in between. This mechanism can more effectively avoid accidental firing.

[0142] Both the first and second presses cause the operating element 20b to displace proximally relative to the support element 30b. This displacement causes the fourth abutment 22b to displace proximally relative to the positioning element 32b, simultaneously reducing the distance between the proximal ends of the operating element 20b and the support element 30b. When this displacement is sufficiently large, the positioning element 32b will pass over the top edge of the fourth abutment 22b and separate from it. The distance between the proximal ends of the operating element 20b and the support element 30b when the positioning element 32b just passes over the top edge of the fourth abutment 22b is defined as the firing distance. In other words, when the distance between the proximal ends of the operating element 20b and the support element 30b is less than the firing distance, the needle assist device will be fired.

[0143] like Figure 25 As shown, when the operating member 20b is in the terminated position, the distance D1 between the proximal end of the operating member 20b and the proximal end of the support member 30b is greater than the firing distance. Figure 26 As shown, when the operating element 20b is in the third position, the distance D2 between the proximal end of the operating element 20b and the proximal end of the support 30b is less than or equal to the firing distance. Thus, when the user performs the first step, that is, presses the operating element 20b for the first time, the needle assist device will not fire; only when the user performs the second step, that is, presses the operating element 20b for the second time, will the needle assist device fire.

[0144] Further, refer to Figure 24 The inner circumferential surface of the operating member 20b may be provided with a guided protrusion 21b, and the outer circumferential surface of the support member 30b may be provided with a first guide groove 311b and a second guide groove 312b arranged sequentially and connected to each other along a circumferential direction (i.e., the Y direction in the figure). The first guide groove 311b extends towards the proximal side as it extends along the circumferential direction, and the second guide groove 312b extends towards the distal side from the first guide groove 311a as it extends along the circumferential direction.

[0145] like Figure 24 and Figure 25As shown, as the operating member 20b moves from the first position to the end position, the guided protrusion 21b moves through the first guide groove 311b to the connection point between the first guide groove 311b and the second guide groove 312b. Figure 25 and Figure 26 As shown, as the operating member 20b moves from the termination position to the second position, the guided protrusion 21b passes through the second guide groove 312b and moves outside the second guide groove 312b from the connection of the two guide grooves 311b and 312b.

[0146] Guided by the first guide groove 311b and the second guide groove 312b, the operating member 20b can move from the first position to the termination position under the action of the first operating force, and can pass through and leave the second guide groove 312b under the drive of the elastic potential energy of the elastic member 43b after the first operating force is removed, thus preparing for firing.

[0147] Further, refer to Figure 26 and Figure 27 The outer peripheral surface of the support member 30b may be provided with a third guide groove 313b, which extends proximally from the second guide groove 312b. For example... Figure 26 and Figure 27 As shown, during the process of the operating member 20b being driven by the second operating force to move from the second position to the third position, the guided protrusion 21b is guided by the third guide groove 313b and moves along the third guide groove 313b to the proximal end of the third guide groove 313b, so that the operating member 20b moves along the expected trajectory to fire the needle assist device.

[0148] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0149] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part does not imply the exclusion of other components or parts.

[0150] It should be understood that although terms such as “first” or “second” may be used in this disclosure to describe various elements (such as the first abutment and the second abutment), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0151] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0152] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A needle aid, characterized in that The sensor is implanted into the target tissue by firing, and includes: a support member having a proximal end placed on the skin of a user; an operating member disposed partially around the support member and movable relative to the support member in a proximal-distal direction; and a firing seat, movement of the operating member relative to the support member in the proximal direction causes the firing seat to move proximally, driving the sensor to be implanted into the target tissue; wherein the operating member is operable to be moved from a first position to a second position relative to the support member, in the first position, relative movement of the operating member relative to the support member is insufficient to cause the needle helper to be fired; in the second position, the operating member is operable to be moved from the second position to a third position relative to the support member, thereby causing the needle helper to be fired.

2. The needle guide of claim 1, wherein The direction of movement of the operating member from the first position to the second position is different from the direction of movement of the operating member from the second position to the third position.

3. The needle guide of claim 2, wherein, The operating member is rotatable from the first position to the second position relative to the support member about an axis in a circumferential direction, and is movable from the second position to the third position relative to the support member in the proximal direction.

4. The needle guide of claim 3, wherein When the operating member is in the first position, movement of the operating member relative to the support member in the proximal direction is restricted; when the operating member is in the second position, movement of the operating member relative to the support member in the proximal direction is allowed.

5. The needle guide of claim 4, wherein, The operating member includes a first abutting portion, and the support member includes a second abutting portion; when the operating member is in the first position, the first abutting portion restricts movement of the operating member relative to the support member in the proximal direction by abutting with the second abutting portion in the proximal direction; when the operating member is in the second position, the first abutting portion is separated from the second abutting portion to allow movement of the operating member relative to the support member in the proximal direction.

6. The needle guide of claim 5, wherein, The operating member is sleeved on an outer periphery of the support member, the first abutting portion includes a protruding portion provided on an inner peripheral surface of the operating member, and the second abutting portion includes a first guide slot provided on an outer peripheral surface of the support member, the first guide slot receives the protruding portion and has a closed end and an open end opposite to each other in the circumferential direction, the closed end and the open end are arranged in sequence in the circumferential direction; As the operating member moves from the first position to the second position, the protruding portion exits the first guide slot through the open end.

7. The needle guide of claim 6, wherein An outer peripheral surface of the support member is further provided with a second guide slot extending in the distal direction from the open end of the first guide slot.

8. The needle guide of claim 4, wherein, Further comprising an energy storage member, in the first position, the stroke of the operating member relative to the support member is insufficient to cause the energy storage member to release potential energy, in the second position, the stroke of the operating member relative to the support member can cause the energy storage member to release potential energy, so that the potential energy drives the needle helper to be fired.

9. The needle guide of claim 8, wherein, The support member is provided with a positioning part. In the first position and the second position, the movement of the positioning part in the axial direction is restricted. The positioning part abuts against the firing seat and restricts the movement of the firing seat in the proximal direction to limit the release of potential energy by the energy storage member. In the third position, the movement of the positioning part in the axial direction is allowed, and the energy storage member is allowed to release elastic potential energy.

10. The needle guide of claim 9, wherein, The firing base is provided with a third abutment, and the operating member is provided with a fourth abutment. The positioning part positions the firing base by abutting against the third abutment. As the operating member moves from the first position to the second position via the termination position, the positioning part remains abutting against the fourth abutment. As the operating member moves from the second position to the third position, the positioning part separates from the fourth abutment.

11. The needle guide of claim 10, wherein, The fourth abutment includes a first mating part and a second mating part, which are arranged sequentially in a direction opposite to the circumferential direction. The top edge of the second mating part is closer to the proximal end of the operating member than the top edge of the first mating part.

12. The needle guide of claim 1, wherein, It also includes an elastic element, wherein the actuating member is moved from the first position relative to the support member by receiving a first operating force in the proximal direction, the actuating member is driven by an elastic restoring force of the elastic element in the distal direction opposite to the proximal direction after the first operating force is removed to move from the terminated position to the second position, and the actuating member is moved from the second position relative to the support member to the third position by receiving a second operating force in the proximal direction, thereby causing the needle assist device to fire.

13. The needle guide of claim 12, wherein, The actuator moves relative to the support in the proximal direction until the distance between the proximal end of the actuator and the proximal end of the support is less than or equal to the firing distance, causing the needle assist device to fire; when the actuator is in the termination position, the distance between the proximal end of the actuator and the proximal end of the support is greater than the firing distance; when the actuator is in the third position, the distance between the proximal end of the actuator and the proximal end of the support is less than or equal to the firing distance.

14. The needle guide of claim 13, wherein, The operating component is sleeved on the support component. The inner circumferential surface of the operating component is provided with a guided protrusion. The outer circumferential surface of the support component is provided with a first guide groove and a second guide groove arranged sequentially and connected to each other along a circumferential direction. The first guide groove extends towards the proximal direction as it extends along the circumferential direction, and the second guide groove extends from the first guide groove towards the distal direction as it extends along the circumferential direction. As the operating component moves from the first position to the termination position, the guided protrusion moves through the first guide groove to the connection point between the first guide groove and the second guide groove. As the actuating element moves from the termination position to the second position, the guided protrusion moves from the connection point through the second guide groove and out of the second guide groove.

15. A needle guide, characterized in that The sensor is implanted into the target tissue by firing, and includes an actuating element that causes the needle to fire by receiving a multi-step operation.

16. The needle guide of claim 15, wherein, The multi-step operation sequentially comprises a first step operation and a second step operation, the first step operation and the second step operation are different operations.

17. The needle guide of claim 16, wherein, The first step operation is a rotating operation, and the second step operation is a pressing operation.

18. The needle guide of claim 15, wherein, The multi-step operation sequentially comprises a first step operation and a second step operation, the first step operation and the second step operation are same operations.

19. The needle guide of claim 18, wherein, The first step operation and the second step operation are both pressing operations.

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