A needle aid for a continuous analyte monitor

Abstract

The utility model relates to medical instrument technical field discloses a kind of needle aid for in-vivo continuous analyte monitor, including shell, the pedestal for installing transmitter, the shell is equipped with trigger body, the trigger body is equipped with release body, the lower end of the release body is connected with needle holder, and the needle holder is equipped with guide needle;At least one set of limiting assembly is equipped in the shell, the guide hole of sliding sleeve is equipped in the limiting assembly in the trigger body, the release body is slidably arranged in the limiting assembly, the pedestal is arranged in the trigger body and is fixedly connected with the shell, and the release body is equipped with elastic member between the pedestal. The utility model has the beneficial effects of convenient to use, trigger stable, trigger process noise small.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a needle aid for an in vivo continuous analyzer monitor. Background Technology

[0002] A needle assist device is a medical aid primarily used to help patients or healthcare professionals perform subcutaneous or intramuscular injections more safely and accurately. It works by guiding a needle through the skin to implant a transmitter into the skin's surface. Its core functions include controlling the needle's insertion speed, depth, and angle to reduce patient discomfort and injection pain; preventing injections that are too deep, too shallow, or deviated due to manual operation errors, thus reducing the risk of needle exposure; and minimizing needlestick injuries for healthcare professionals and patients, thereby improving operational accuracy and enhancing safety.

[0003] Existing needle-implanting devices are typically complex in structure, often employing multiple springs to assist the implantation process. The assembly process is complicated, and the operation is complex and unstable. During operation, the skin needs to be pressed before the trigger button is pressed, which carries risks and can easily lead to unsuccessful triggering. The triggering process is also quite noisy, causing psychological fear in the user. Unsuccessful triggering requires replacement and re-triggering, further exacerbating the user's psychological fear. Utility Model Content

[0004] In order to solve the above-mentioned problems in the prior art, this utility model provides an auxiliary needle for an in vivo continuous analyte monitor that is easy to use, has stable triggering, and has low noise during the triggering process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A needle assist device for an in vivo continuous analyte monitor includes a housing and a base for mounting a transmitter. The housing contains a trigger body, and the trigger body contains a release body. The lower end of the release body is connected to a needle holder, and the needle holder has a guide needle. The housing contains at least one set of limiting components. The trigger body has a guide hole that slides outside the limiting components. The release body is slidably disposed within the limiting components. The base is disposed within the trigger body and fixedly connected to the housing. An elastic element is provided between the release body and the base.

[0006] In the initial state, the lower end of the trigger extends beyond the lower end of the housing, the base is located inside the trigger, the transmitter is located below the base and connected to the snap-fit ​​assembly on the base, and the release device is limited by the limiting assembly. When the trigger is pressed down to the guiding state, the limiting assembly maintains the limiting of the trigger, and the lower end of the guide pin extends beyond the lower end of the trigger. When the trigger continues to be pressed down to the firing state, the limiting assembly releases the limiting of the trigger, and the trigger drives the guide pin to move upward until it is completely separated from the transmitter, while the snap-fit ​​assembly separates from the transmitter. During use, the lower end of the trigger body is pressed against the skin surface. As the trigger body is pressed down, it first enters the guiding state. In the guiding state, the guide needle pierces the skin surface and guides the insertion of the transmitter. Then, as the trigger body continues to be pressed down, it enters the firing state. At this time, the guide needle and the transmitter are completely separated, and the locking component on the base separates from the transmitter, allowing the transmitter to be implanted into the skin. This type of needle aid is very simple to use, and the trigger body is moved by pressure to achieve triggering. It is more stable to use, the triggering process is gentler, and the noise is less, making it less likely to cause psychological fear to the user.

[0007] Preferably, the limiting component includes a first limiting member. The side of the first limiting member has a first guide groove distributed along the movement direction of the trigger body. The lower end of the first limiting member has a first limiting surface, which extends upwards from the lower end of the first limiting member and communicates with the first guide groove. The inner wall of the guide hole has a first stop bar that slides along the first guide groove. The outer wall of the release body has a first protrusion bar corresponding to the first limiting surface. In the guiding state, the lower end of the first stop bar extends beyond the upper end of the first limiting surface, causing the first protrusion bar to be limited by the first limiting surface and the first stop bar. In the firing state, the first stop bar moves to a position lower than the first limiting surface, causing the first protrusion bar to contact the limiting point and enter the first guide groove, moving upwards along the first guide groove, thus separating the guide pin from the transmitter.

[0008] Preferably, the limiting component further includes a second limiting member, a second guide groove is provided between the second limiting member and the first limiting member, a second limiting surface is provided at the lower end of the second limiting member, the second limiting surface is inclined upward from the lower end of the second limiting member and communicates with the second guide groove, a second stop bar is provided on the inner wall of the guide hole and slides along the second guide groove, a second protrusion bar is provided on the outer wall of the release body at the corresponding position of the second limiting surface, the length of the second stop bar is less than that of the first stop bar, and a connecting ear for connecting the sterilization component is provided on the needle seat. In the initial state, the lower end of the connecting ear extends beyond the lower end face of the housing. The second protrusion abuts against the second limiting surface and is blocked and limited by the second stop bar, forming a gap between the first protrusion and the first stop bar. When the trigger body is pressed down to the guiding pre-position state, the second stop bar releases its limitation on the second protrusion, allowing the release body to move under the action of the elastic element until the first protrusion and the first stop bar abut against each other. At this time, the lower end of the connecting ear moves upward to not extend beyond the lower end face of the housing. Then, the trigger body continues to press down to enter the guiding state. The initial state of the lower end of the connecting ear extending beyond the lower end face of the housing reduces the axial dimension of the housing. During use, when the trigger body is pressed down, it first enters the guiding pre-position state, in which the lower end of the connecting ear is completely retracted into the housing, preventing the connecting ear from pressing on the skin and causing discomfort. Then, it enters the guiding state and the firing state. This design reduces the overall volume of the needle aid and does not cause discomfort.

[0009] Preferably, the limiting components are configured in two sets, distributed circumferentially; the inner surfaces of the first and second limiting members are configured as concentric arc surfaces, and the trigger body is configured as a columnar structure; the trigger body is clearance-fitted with the inner surfaces of the first and second limiting members, so that when the trigger body moves from the initial state to the guide-prepare state, the release body simultaneously performs axial movement and circumferential rotation. The combined use of the two sets of limiting components makes the force on the release body more stable during the needle-assisted process.

[0010] Preferably, the surface of the trigger body is provided with several clearance grooves that penetrate the inner wall, and the inner wall of the housing is provided with several connecting pieces corresponding to the clearance grooves. The connecting pieces slide axially through the clearance grooves and extend into the trigger body, and the lower inner side of the connecting pieces is connected to the base. This arrangement achieves the connection between the housing and the base without adding any components.

[0011] Preferably, the lower inner side of the connecting piece is provided with a slot, and the edge of the base is engaged into the slot to form a snap-fit ​​fixation. The slot on the connecting piece engages with the edge of the base, facilitating installation and disassembly.

[0012] Preferably, the inner wall of the trigger body is provided with an elastic locking tab, and the lower inner side of the locking tab is provided with a locking protrusion. In the initial state, the locking protrusion is locked at the lower end of the base; when the trigger body moves upward, the locking tab deforms to avoid the locking protrusion from the base; the locking tab and locking protrusion limit the trigger body in the initial state, and can only move when the downward force of the trigger body reaches a preset value during use, thereby preventing the trigger body from being accidentally triggered and further improving the stability of use.

[0013] Preferably, the snap-fit ​​tab and the trigger body are configured as a single unit, and the snap-fit ​​protrusion and the snap-fit ​​tab are configured as a single unit. This structure reduces the number of parts and assembly, making the overall structure more streamlined.

[0014] Preferably, the latching assembly is configured in two sets, with the two sets of latching assemblies distributed on both sides of the base; the latching assembly includes a latch ear and a latch hook disposed on the inner side of the lower end of the latch ear, and the trigger body is provided with a driving part for driving the latch hook to open and close; in the initial state, the latch ear is located at the upper end of the driving part, and the driving part drives the latch hook to move closer to each other and latch with the transmitter; when the trigger body moves to the firing state, the latch ear is located at the lower end of the driving part, and the driving part drives the latch hook to move away from each other and separate from the transmitter.

[0015] Preferably, the driving part includes a guide groove distributed along the moving direction of the trigger body, an inner protrusion strip on the inner wall of the upper end of the guide groove, and an outer protrusion strip on the outer wall of the lower end of the guide groove. The outer side of the latch is provided with a connecting arm, and the outer end of the connecting arm is provided with a connecting block. When the connecting arm is at the upper end of the guide groove, the inner protrusion strip presses against the outer side of the latch, causing the two latches to move closer to each other. When the connecting arm is at the lower end of the guide groove, the outer protrusion strip pulls the connecting block outward, causing the two latches to move away from each other.

[0016] Therefore, this invention has the advantages of being easy to use, having stable triggering, and having low noise during the triggering process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 for Figure 1 Exploded view.

[0019] Figure 3 This is a schematic diagram of the internal structure of the shell.

[0020] Figure 4 This is a schematic diagram of a trigger body.

[0021] Figure 5 This is another perspective view of the trigger body.

[0022] Figure 6 This is a schematic diagram of the base structure.

[0023] Figure 7 for Figure 2 A magnified view of a portion of point A in the middle.

[0024] Figure 8 This is a schematic diagram of the structure of the released body in its initial state.

[0025] Figure 9 This is a schematic diagram showing the release body in the pre-guided state.

[0026] Figure 10 This is a schematic diagram showing the release body in a guided state.

[0027] Figure 11 This is a schematic diagram showing the release of the object from the guidance state to the launch state.

[0028] Figure 12 This is a schematic diagram of the release body in the firing state.

[0029] Figure 13 This is a schematic diagram of the initial state of the snap-fit ​​component.

[0030] Figure 14 This is a schematic diagram of the state of the card-connected component in the launch state. Detailed Implementation

[0031] To make the technical problem to be solved, the technical solution, and the beneficial technical effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the scope of protection of the present utility model.

[0032] It should be understood that the terms "first," "second," etc., used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly specifying the number of technical features indicated. Features specified as "first" or "second" may expressly or implicitly indicate that at least one of those features is included.

[0033] like Figures 1-7The illustrated needle aid for an in vivo continuous analyte monitor includes a housing 1 and a base 5 for mounting a transmitter 6. The housing 1 contains a trigger body 2, and the trigger body 2 contains a release body 3. The lower end of the release body 3 is connected to a needle holder 4, and the needle holder 4 has a guide needle 41. The housing 1 contains at least one set of limiting components 10. The trigger body 2 has a guide hole 20 that slides outside the limiting components 10. The release body 3 is slidably disposed within the limiting components 10. The base 5 is disposed within the trigger body 2 and fixedly connected to the housing 1. An elastic element 7 is provided between the release body 3 and the base 5. In the initial state... The lower end of the trigger body 2 extends beyond the lower end of the housing 1. The base 5 is located inside the trigger body 2. The transmitter 6 is located on the lower side of the base 5 and connected to the snap-fit ​​assembly 50 on the base 5. The release body 3 is limited by the limiting assembly 10. When the trigger body 2 is pressed down to the guiding state, the limiting assembly 10 maintains the limitation on the release body 3, and the lower end of the guide pin 41 extends beyond the lower end of the trigger body 2. When the trigger body 2 continues to be pressed down to the firing state, the limiting assembly 10 releases the limitation on the release body 3, and the release body 3 drives the guide pin 41 to move upward until it is completely separated from the transmitter 6. At the same time, the snap-fit ​​assembly 50 separates from the transmitter 6.

[0034] The limiting component 10 includes a first limiting member 11. The side of the first limiting member 11 is provided with a first guide groove 111 distributed along the movement direction of the trigger body 2. The lower end of the first limiting member 11 is provided with a first limiting surface 112. The first limiting surface 112 extends upward from the lower end of the first limiting member 11 and communicates with the first guide groove 111. The inner wall of the guide hole 20 is provided with a first stop bar 21 that slides along the first guide groove 111. The outer wall of the release body 3 is connected to the first limiting surface 11. A first protrusion 31 is provided at the corresponding position; in the guiding state, the lower end of the first stop bar 21 extends beyond the upper end of the first limiting surface 112, so that the first protrusion 31 is limited by the first limiting surface 112 and the first stop bar 21; in the firing state, the first stop bar 21 moves to a position lower than the lower end of the first limiting surface 112, so that the first protrusion 31 is released from the limitation and enters the first guide groove 111 and moves upward along the first guide groove 111, so that the guide pin 41 is separated from the transmitter 6.

[0035] The limiting component 10 further includes a second limiting member 12. A second guide groove 121 is provided between the second limiting member 12 and the first limiting member 11. The second guide groove 121 is distributed along the movement direction of the trigger body 2. A second limiting surface 122 is provided at the lower end of the second limiting member 12. The second limiting surface 122 extends upward from the lower end of the second limiting member 12 and communicates with the second guide groove 121. A second stop 22 that slides along the second guide groove 121 is provided on the inner wall of the guide hole 20. A second protrusion 32 is provided on the outer wall of the release body 3 at a position corresponding to the second limiting surface 122. In some embodiments, the length of the second stop 22 is less than that of the first stop 21. In other embodiments, the length of the second protrusion 32 is the same as that of the first protrusion 31. The end of the lower end of the second limiting surface 122 that is inclined upward is higher than the end of the lower end of the first limiting surface 121 that is inclined upward. As long as the height of the end of the inclined upward of the limiting surface and the length of the protrusion match each other, the release body 3 can move axially and rotate circumferentially synchronously.

[0036] The needle hub 4 is provided with a connecting ear 42 for connecting the sterilization component; in the initial state, the lower end of the connecting ear 42 extends beyond the lower end face of the housing 1, the second protrusion 32 abuts against the second limiting surface 122 and is blocked and limited by the second stop 22, and a gap is formed between the first protrusion 31 and the first stop 21; when the trigger body 2 is pressed down to the guide pre-position state, the second stop 22 releases the limitation on the second protrusion 32, so that the release body 3 moves under the action of the elastic member 7 until the first protrusion 31 abuts against the first stop 21, at which time the lower end of the connecting ear 42 moves upward to not extend beyond the lower end face of the housing 1; then the trigger body 2 continues to be pressed down to enter the guide state.

[0037] In some embodiments, the elastic element 7 is configured as a compression spring, and the limiting components 10 are configured in two sets, with the two sets of limiting components 10 distributed circumferentially; the inner surfaces of the first limiting component 11 and the second limiting component 12 are configured as concentric arc surfaces, and the trigger body 2 is configured as a columnar structure; the trigger body 2 is clearance-fitted with the inner surfaces of the first limiting component 11 and the second limiting component 12, so that when the trigger body 2 moves from the initial state to the guide pre-position state, the release body 3 simultaneously performs axial movement and circumferential rotation.

[0038] like Figure 4 and Figure 5 As shown, the surface of the trigger body 2 is provided with several clearance grooves 23 that penetrate the inner wall. The inner wall of the housing 1 is provided with several connecting pieces 13 corresponding to the clearance grooves 23. The connecting pieces 13 slide axially through the clearance grooves 23 and extend into the trigger body 2. The inner side of the lower end of the connecting piece 13 is connected to the base 5. The inner side of the lower end of the connecting piece 13 is provided with a retaining groove 130. The edge of the base 5 is engaged in the retaining groove 130 to form a snap-fit ​​fixation.

[0039] like Figure 4 and Figure 13 As shown, the inner wall of the trigger body 2 is provided with an elastic snap-fit ​​piece 24, and the lower inner side of the snap-fit ​​piece 24 is provided with a snap-fit ​​protrusion 25; in the initial state, the snap-fit ​​protrusion 25 is snapped into the lower end of the base 5; when the trigger body 2 moves upward, the snap-fit ​​piece 24 deforms to avoid the snap-fit ​​protrusion 25 from the base 5. In some embodiments, the snap-fit ​​piece 24 and the trigger body 2 are configured as an integral structure, and the snap-fit ​​protrusion 25 and the snap-fit ​​piece 24 are configured as an integral structure.

[0040] like Figure 6 , Figure 13 and Figure 14 As shown, the latching assembly 50 is configured in two sets, with the two sets of latching assemblies 50 distributed on both sides of the base 5. The latching assembly 50 includes a latch 501 and a latch hook 502 disposed on the inner side of the lower end of the latch 501. The trigger body 2 is provided with a driving part 26 for driving the latch hook 502 to open and close. In the initial state, the latch 501 is located at the upper end of the driving part 26, and the driving part 26 drives the latch hook 502 to move closer to each other and latch with the transmitter 6. When the trigger body 2 moves to the firing state, the latch 501 is located at the lower end of the driving part 26, and the driving part 26 drives the latch hook 502 to move away from each other and separate from the transmitter 6. The driving unit 26 includes a guide groove 260 distributed along the moving direction of the trigger body 2, an inner protrusion 261 provided on the inner wall of the upper end of the guide groove 260, and an outer protrusion 262 provided on the outer wall of the lower end of the guide groove 260. The outer side of the latch 501 is provided with a connecting arm 503, and the outer end of the connecting arm 503 is provided with a connecting block 504. When the connecting arm 503 is at the upper end of the guide groove 260, the inner protrusion 261 presses against the outer side of the latch 501, causing the two latches 502 to move closer to each other. When the connecting arm 503 is at the lower end of the guide groove 260, the outer protrusion 262 pulls the connecting block 504 outward, causing the two latches 502 to move away from each other.

[0041] Referring to the accompanying drawings, the principle of this utility model is as follows: Initial state as... Figure 8 As shown, the upper end of the second protrusion 32 acts on the second limiting surface 122, the side of the second protrusion 32 abuts against the second stop 22 for limiting, the first protrusion 31 is located at the lower end of the first limiting surface 112, and a gap is formed between the first protrusion 31 and the first stop 21; when the trigger body 2 is pressed down to Figure 9 In the guided forward position shown, the second stop bar 22 releases the restriction on the second protrusion bar 32, at which time the first protrusion bar 31 moves along the first limiting surface 112 until it abuts against the first stop bar 21 (as shown). Figure 10As shown), the release body 3 moves a certain displacement along the axial direction while rotating a certain angle circumferentially. During the movement of the release body 3, it drives the connecting ear 42 on the needle hub to move upward, so that the lower end of the connecting ear 42 does not exceed the lower end face of the housing (to prevent the connecting ear 42 from pressing on the skin and causing discomfort); Figure 10 In the indicated state, continue pressing down on trigger body 2. Because the first protrusion 31 on release body 3 is always blocked and limited by the first stop 21, in the guiding state, when trigger body 2 moves, release body 3 does not move, allowing the guide needle to guide the transmitter into the skin; when trigger body 2 moves to Figure 11 In the launch state shown, the first stop bar 21 and the first protrusion bar 31 are released from their limiting positions. At this time, the first protrusion bar 31 and the second protrusion bar 32 enter the first guide groove 111 and the second guide groove 121, respectively. Figure 12 and Figure 14 As shown, under the action of the elastic element 7, the release body 3 moves upward to the bottom of the housing, thereby causing the guide pin to separate from the transmitter, and at the same time the locking assembly 50 moves to... Figure 14 As shown, hook 502 is open and completely separated from the transmitter, thus enabling the transmitter to be implanted into the skin. All of the above actions are triggered in a preset sequence by the trigger body during the pressing process. Overall, it is very convenient to use, the triggering action is very stable, and it is not prone to jamming or accidental triggering. Furthermore, it operates with low noise, minimizing psychological burden and fear for the user.

[0042] In the description of this utility model, it should be understood that the directions or positional relationships indicated by up, down, left, right, inner end, outer end, one end, and the other end are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the purpose of more clearly describing the technical solution of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as a limitation of this utility model.

[0043] Although specific embodiments of the present invention are described in detail herein, they are given for illustrative purposes only and should not be construed as limiting the scope of the present invention. Various substitutions, alterations, and modifications may be conceived without departing from the spirit and scope of the present invention.

Claims

1. A needle aid for an in vivo continuous analyte monitor, comprising a housing (1) and a base (5) for mounting a transmitter (6), characterized in that, The housing (1) is provided with a trigger body (2), the trigger body (2) is provided with a release body (3), the lower end of the release body (3) is connected to a needle seat (4), and the needle seat (4) is provided with a guide needle (41). The housing (1) is provided with at least one set of limiting components (10), the trigger body (2) is provided with a guide hole (20) that is slidably sleeved outside the limiting components (10), the release body (3) is slidably disposed in the limiting components (10), the base (5) is disposed in the trigger body (2) and fixedly connected to the housing (1), and an elastic element (7) is provided between the release body (3) and the base (5).

2. The needle applicator for an in vivo continuous analyte monitor according to claim 1, characterized in that, The limiting component (10) includes a first limiting member (11). The side of the first limiting member (11) is provided with a first guide groove (111) distributed along the movement direction of the trigger body (2). The lower end of the first limiting member (11) is provided with a first limiting surface (112). The first limiting surface (112) is inclined upward from the lower end of the first limiting member (11) and communicates with the first guide groove (111). The inner wall of the guide hole (20) is provided with a first stop (21) that slides along the first guide groove (111). The outer wall of the release body (3) is provided with a first protrusion (31) corresponding to the first limiting surface (112).

3. The needle applicator for an in vivo continuous analyte monitor according to claim 2, characterized in that, The limiting component (10) further includes a second limiting member (12), a second guide groove (121) is provided between the second limiting member (12) and the first limiting member (11), a second limiting surface (122) is provided at the lower end of the second limiting member (12), the second limiting surface (122) is inclined upward from the lower end of the second limiting member (12) and communicates with the second guide groove (121), the inner wall of the guide hole (20) is provided with a second stop (22) that slides along the second guide groove (121), the outer wall of the release body (3) is provided with a second protrusion (32) corresponding to the second limiting surface (122), the length of the second stop (22) is less than that of the first stop (21), and the needle seat (4) is provided with a connecting ear (42) for connecting the sterilization component.

4. The needle applicator for an in vivo continuous analyte monitor according to claim 3, characterized in that, The limiting components (10) are configured in two sets, and the two sets of limiting components (10) are distributed circumferentially; the inner surfaces of the first limiting member (11) and the second limiting member (12) are configured as circular arc surfaces, and the trigger body (2) is configured as a columnar structure; the trigger body (2) is clearance-fitted with the inner surfaces of the first limiting member (11) and the second limiting member (12), so that when the trigger body (2) moves from the initial state to the guide pre-position state, the release body (3) simultaneously performs axial movement and circumferential rotation.

5. The needle applicator for an in vivo continuous analyte monitor according to claim 1, characterized in that, The surface of the trigger body (2) is provided with several relief grooves (23) that penetrate the inner wall. The inner wall of the housing (1) is provided with several connecting pieces (13) corresponding to the relief grooves (23). The connecting pieces (13) slide axially through the relief grooves (23) and extend into the trigger body (2). The lower inner side of the connecting piece (13) is connected to the base (5).

6. The needle applicator for an in vivo continuous analyte monitor according to claim 5, characterized in that, The lower inner side of the connecting piece (13) is provided with a slot (130), and the edge of the base (5) is inserted into the slot (130) to form a snap-fit ​​fixation.

7. A needle applicator for an in vivo continuous analyte monitor according to claim 1, 5, or 6, characterized in that, The inner wall of the trigger body (2) is provided with an elastic snap-fit ​​piece (24), and the lower inner side of the snap-fit ​​piece (24) is provided with a snap-fit ​​protrusion (25).

8. The needle applicator for an in vivo continuous analyte monitor according to claim 7, characterized in that, The snap-fit ​​piece (24) and the trigger body (2) are configured as an integral structure, and the snap-fit ​​protrusion (25) and the snap-fit ​​piece (24) are configured as an integral structure.

9. The needle applicator for an in vivo continuous analyte monitor according to claim 1, characterized in that, The transmitter (6) is located on the lower side of the base (5) and connected to the snap-fit ​​assembly (50) on the base (5). The snap-fit ​​assembly (50) is configured in two sets, and the two sets of snap-fit ​​assemblies (50) are distributed on both sides of the base (5). The snap-fit ​​assembly (50) includes a latch (501) and a hook (502) located on the inner side of the lower end of the latch (501). The trigger body (2) is provided with a drive part (26) for opening and closing the hook (502).

10. A needle applicator for an in vivo continuous analyte monitor according to claim 9, characterized in that, The drive unit (26) includes a guide groove (260) distributed along the moving direction of the trigger body (2), an inner protrusion (261) provided on the inner wall of the upper end of the guide groove (260), and an outer protrusion (262) provided on the outer wall of the lower end of the guide groove (260). The outer side of the latch (501) is provided with a connecting arm (503), and the outer end of the connecting arm (503) is provided with a connecting block (504). When the connecting arm (503) is at the upper end of the guide groove (260), the inner protrusion (261) presses against the outer side of the latch (501) so that the two latches (502) move closer to each other; when the connecting arm (503) is at the lower end of the guide groove (260), the outer protrusion (262) pulls the connecting block (504) outward so that the two latches (502) move away from each other.

Images