Applicator

Abstract

The applicator of the present application comprises a first shell, a second shell at least partially accommodated in the first shell, a pushing block in sliding connection with the second shell, a first elastic member installed between the first shell and the pushing block in a pre-compressed manner, and an analyte sensor installed on the pushing plate. The pushing block is provided with a hook plate capable of penetrating through the second shell and being in clamping cooperation with the second shell. The top wall of the first shell is provided with a trigger member extending towards the hook plate. The trigger member can drive the hook to be separated from the second shell under the driving of the top wall, so that the pushing block can drive the analyte sensor to pop out of the second shell under the pushing of the first elastic member in the pre-compressed state. In this way, the applicator is free of buttons on the outside, which not only saves the setting of the unlocking safety device matched with the buttons, but also maintains the continuity and beauty of the appearance of the applicator. In addition, the stability of the user when using the applicator is also improved.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to an applicator. Background Technology

[0002] An applicator is a tool used to help an analytical sensor be worn by a user.

[0003] Currently, the buttons used to trigger the ejection and insertion of the analyte sensor in existing applicators are usually exposed on the applicator itself. However, since the button's placement clearly guides the user to touch and press it, an additional safety device is needed to prevent accidental activation and insertion of the analyte sensor. This would add an extra step of unlocking the safety device. Furthermore, the exposed button creates a discontinuous and abrupt appearance on the applicator, affecting its overall aesthetics. Summary of the Invention

[0004] In view of this, it is necessary to provide an applicator for solving the above-mentioned technical problems.

[0005] An applicator includes a first housing, a second housing, a pusher block, a first elastic element, and an analyte sensor. The second housing is at least partially housed within the first housing and slidably connected to the pusher block. The pusher block has a hook plate that can pass through the second housing and engage with it. The first elastic element is pre-compressed and installed between the first housing and the pusher block. The analyte sensor is mounted on the pusher block.

[0006] A trigger is provided on the top wall of the first housing. The trigger extends toward the hook plate and can drive the hook plate away from the second housing under the action of the top wall, so that the push block can push the analyte sensor out of the second housing under the push of the first elastic member in the pre-compressed state.

[0007] Understandably, by placing the trigger element that controls the hook plate to detach from the second housing on the top wall of the first housing facing the second housing, and then using a pre-compressed first elastic element to drive the push block to eject the analyzer sensor from the second housing, the applicator can be made buttonless. This not only eliminates the need for a matching button unlocking safety device, but also maintains the continuity and aesthetics of the applicator's appearance. In addition, the ejection of the analyzer sensor from the second housing by the push block is not affected by the trigger element driven by pressing the top wall, thus improving the stability of the applicator when used by the user.

[0008] In one embodiment, the second housing is formed with a baffle, and a hook plate passing through the second housing can be engaged with the baffle;

[0009] The trigger has a pushing slope, and the trigger can elastically deform by pushing the hook plate away from the baffle through the pushing slope.

[0010] In one embodiment, the top wall is further provided with a latching member, and the second housing is provided with a latching engagement member. Along the movement direction of the trigger member, the latching member abuts against the latching engagement member, and the latching member can drive the latching engagement member and / or the latching member to undergo elastic deformation under the action of the top wall.

[0011] Understandably, the trigger needs to overcome the elastic deformation of the snap-fit ​​parts and / or snap-fit ​​parts in order to push the hook plate upward. In this way, the applicator can be designed differently according to different user needs to facilitate user operation.

[0012] In one embodiment, the first housing is further provided with a positioning member, and the second housing is provided with a positioning engagement member, wherein the positioning member and the positioning engagement member slide engagement along the movement direction of the trigger member.

[0013] In one embodiment, the push block is further provided with a limiting plate, which slides in conjunction with the second housing along the movement direction of the trigger.

[0014] In one embodiment, the limiting plate extends through the second housing; wherein the limiting plate has a hook portion that can abut against the second housing under the action of the pushing block.

[0015] In one embodiment, the applicator further includes a retraction block movably mounted on the push block;

[0016] The analyte sensor is equipped with a probe, and the retraction block is equipped with an auxiliary needle. The auxiliary needle forms an inward accommodating cavity, and the probe is housed within the accommodating cavity.

[0017] It is understandable that the auxiliary needle on the retraction block is used to assist the probe on the analyzer sensor in inserting into the user's subcutaneous tissue. In this way, the probe on the analyzer sensor can be protected during the implantation process in the user's subcutaneous tissue, preventing the probe from being damaged by pressure.

[0018] In one embodiment, the applicator further includes a second elastic element, which is pre-compressed and installed between the retraction block and the push block;

[0019] The push block is also provided with an elastic claw, which can abut against the inner peripheral wall of the second housing; wherein, there is a position interference portion between the elastic claw and the retraction block, and the elastic claw is configured to elastically deform in a direction away from the retraction block in response to the pushing of the retraction block.

[0020] Understandably, using a pre-compressed second elastic element to automatically retract the retraction block into the applicator prevents physical injury and visual impact to the user from the auxiliary needle being exposed.

[0021] In one embodiment, the elastic claw has an inclined surface that abuts against the retracting block along the direction of movement of the retracting block relative to the pushing block, and forms the position interference portion.

[0022] In one embodiment, a groove is provided on the outer peripheral wall of the retracting block, and the elastic claw can slide and engage with the groove along the direction of movement of the retracting block relative to the pushing block.

[0023] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0024] The applicator of the present invention has a trigger element for controlling the hook plate to detach from the second housing, which is located on the top wall of the first housing facing the second housing. A pre-compressed first elastic element is used to drive the push block to eject the analyzer sensor from the second housing. In this way, there are no buttons on the outside of the applicator, which not only eliminates the need for a matching button unlocking safety device, but also maintains the continuity and aesthetics of the applicator's appearance. In addition, the ejection of the analyzer sensor from the second housing by the push block is not affected by the action of the trigger element when the top wall is pressed, thus improving the stability of the applicator when used by the user. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an applicator provided in one embodiment of this application;

[0027] Figure 2 This is an exploded view of an applicator provided in an embodiment of this application;

[0028] Figure 3This is a schematic diagram of the structure of the first housing provided in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the structure of the second housing provided in an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the structure of a push block provided in an embodiment of this application;

[0031] Figure 6 This is a schematic diagram of the structure of a rollback block provided in an embodiment of this application;

[0032] Figure 7 This is a cross-sectional view of the applicator provided in an embodiment of this application in its initial state, wherein the first housing is in a hidden state;

[0033] Figure 8 This is a schematic diagram of the structure of the applicator provided in an embodiment of this application in its initial state;

[0034] Figure 9 for Figure 8 Enlarged view of the middle P section;

[0035] Figure 10 This is a schematic diagram of the structure of the top arm of the first housing in an applicator provided in an embodiment of this application when it is pressed;

[0036] Figure 11 This is a schematic diagram of the structure of the applicator provided in an embodiment of the present application when the push block is fully ejected from the second housing;

[0037] Figure 12 This is a schematic diagram of the structure of the retraction block in the applicator provided in an embodiment of this application when it completes its retraction.

[0038] Reference numerals: 100, applicator; 10, first housing; 101, top wall; 11, trigger element; 111, pushing inclined surface; 12, snap-fit ​​element; 121, protruding tooth; 1211, inclined surface; 13, positioning element; 20, second housing; 201, inner peripheral wall; 21, baffle; 22, snap-fit ​​mating element; 221, stop beam; 23, positioning mating element; 30, pushing block; 301, protruding buckle; 31, hook plate; 32, limiting plate; 321, hook part; 33, elastic claw; 331, inclined surface; 40, first elastic element; 50, analyte sensor; 51, probe; 60, retraction block; 61, auxiliary needle; 611, accommodating cavity; 62, outer peripheral wall; 621, groove; 70, second elastic element. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] like Figures 1 to 3 and Figure 5 As shown, an embodiment of the present application provides an applicator 100, including a first housing 10, a second housing 20, a pusher block 30, a first elastic member 40, and an analytical sensor 50. The second housing 20 is at least partially housed within the first housing 10 and is slidably connected to the pusher block 30. The pusher block 30 is provided with a hook plate 31, which can pass through the second housing 20 and engage with it. The first elastic member 40 is pre-compressed and installed between the first housing 10 and the pusher block 30. The analytical sensor 50 is installed on the pusher block 30. The top wall 101 of the first housing 10 is provided with a trigger member 11, which extends toward the hook plate 31. The trigger member 11 can drive the hook plate 31 to disengage from the second housing 20 under the action of the top wall 101, so that the pusher block 30, under the push of the first elastic member 40 in a pre-compressed state, can cause the analytical sensor 50 to pop out from the second housing 20. It should be noted that the aforementioned analyte sensor 50 can be embedded in the push block 30 and limited by the protrusion 301 on the push block 30, thus preventing the analyte sensor 50 from falling off the push block 30 under the action of gravity.

[0043] It is understandable that the trigger 11, which controls the hook plate 31 to disengage from the second housing 20, is located on the top wall 101 of the first housing 10 facing the second housing 20. The pre-compressed first elastic member 40 is then used to drive the push block 30 to eject the analyzer sensor 50 from the second housing 20. In this way, the applicator 100 has no external buttons, which not only eliminates the need for a matching button unlocking safety device, but also maintains the continuity and aesthetics of the applicator 100's appearance. In addition, the push of the hook plate 31 by the trigger 11 and the ejection of the analyzer sensor 50 from the second housing 20 by the push block 30 are independent of each other and do not affect each other. This improves the stability when the user uses the applicator 100, and the different pressing pressures when pressing the top wall 101 of the first housing 10 will not affect the ejection of the push block 30 from the second housing 20.

[0044] It should be noted that the top wall 101 mentioned above specifically refers to the side wall of the first housing 10 facing the second housing 20, and the top wall 101 of the first housing 10 has a certain elasticity, so that when the user presses the top wall 101 from the outside, it can drive the trigger 11 to move and push the top bed over the hook plate 31 of the second housing 20. For this reason, the first housing 10 can be set as a plastic housing with a relatively thin wall thickness. Correspondingly, the second housing 20 and the pushing block 30 can also be set as plastic parts.

[0045] like Figure 4 , Figure 7 As shown, in some embodiments, the second housing 20 is formed with a baffle 21, and the hook plate 31 passing through the second housing 20 can be snapped onto the baffle 21. That is, the push block 30 can be limited to the second housing 20 by the snapping engagement between the hook plate 31 and the baffle 21, so that the first elastic member 40 installed between the push block 30 and the first housing 10 can be kept in a pre-compressed state.

[0046] like Figure 3 As shown, in some embodiments, the trigger 11 has a pushing slope 111, and the trigger 11 can push the hook plate 31 away from the baffle 21 through the pushing slope 111 to undergo elastic deformation, which can realize the pushing of the hook plate 31 away from the baffle 21.

[0047] For example, there are two hook plates 31, which can be simultaneously engaged with the baffle 21. This improves the stability of the push block 30 when it is assembled and limited on the second housing 20. Correspondingly, the trigger member 11 has two abutting ramps 111, which correspond one-to-one with the two hook plates 31. Of course, those skilled in the art can also set the number of hook plates 31 to one, three, four, etc., which will not be elaborated here.

[0048] like Figure 3 , Figure 4 As shown, in some embodiments, the top wall 101 is further provided with a latching member 12, and the second housing 20 is provided with a latching engagement member 22. Along the movement direction of the trigger member 11, the latching member 12 abuts against the latching engagement member 22, and the latching member 12 can drive the latching engagement member 22 and / or the latching member 12 to undergo elastic deformation under the action of the top wall 101. That is to say, when the user presses the top wall 101 and drives the trigger member 11 to move, it needs to overcome the abutment limit between the latching member 12 and the latching engagement member 22. In other words, the pressing force of the user when pressing the top wall 101 needs to be greater than the force required for the latching member 12 and / or the latching engagement member 22 to undergo elastic deformation. In this way, the applicator 100 can be designed differently according to different user needs to facilitate user operation. It should be noted that different users (such as children and adults) apply different pressure when pressing the top wall 101 of the first housing 10. Therefore, the pressure can be adjusted by changing the force required for the elastic deformation of the above-mentioned snap fastener 22 and / or snap fastener 12.

[0049] For example, the latching member 12, driven by the top wall 101, can cause the latching mating member 22 to undergo elastic deformation. Therefore, the structural strength of the latching mating member 22 can be adjusted by changing its size, wall thickness, etc., thereby driving the applicator 100 to eject the push block 30 from the second housing 20 under different pressing pressures. Of course, those skilled in the art will also understand that the latching member 12, driven by the top wall 101, can also undergo elastic deformation, or that the latching member 12 and the latching mating member 22 can undergo elastic deformation simultaneously; this will not be elaborated upon here.

[0050] like Figure 3 , Figure 4 and Figure 9As shown, the snap-fit ​​component 22 is configured as a door frame structure. The snap-fit ​​component 12 has multiple protrusions 121, which are arranged sequentially along the movement direction of the trigger component 11. When the applicator 100 is in the initial state, the stop beam 221 on the snap-fit ​​component 22 is engaged between two adjacent protrusions 121. In this way, the assembly limit of the first housing 10 on the second housing 20 can be achieved, preventing the first housing from detaching from the second housing 20. Afterward, when the snap-fit ​​component 12 can push the snap-fit ​​component 22 with the inclined surface 1211 on the protrusions 121 under the action of the top wall 101, the push of the snap-fit ​​component 22 by the inclined surface 1211 can cause the snap-fit ​​component 22 to undergo elastic deformation, and allow the protrusions 121 on the snap-fit ​​component 12 located outside the stop beam 221 to bypass the stop beam 221 and move into the snap-fit ​​component 22. Of course, those skilled in the art can also set the buckle 12 as a door frame structure, and the buckle mating part 22 has protruding teeth arranged sequentially along the movement direction of the trigger 11, which will not be elaborated here.

[0051] As can be seen from the above, the fastener 12 and the fastener 22 correspond one-to-one. In this embodiment, the number of fasteners 12 is set to three, and the three fasteners 12 are arranged at intervals along the circumferential direction of the first housing 10. Of course, in other embodiments, the number of fasteners 12 can also be set to two, four, five, or even more.

[0052] like Figure 3 , Figure 4 As shown, in some embodiments, the first housing 10 is further provided with a positioning member 13, and the second housing 20 is provided with a positioning mating member 23. Along the movement direction of the trigger member 11, the positioning member 13 and the positioning mating member 23 are slidably engaged. In this way, the relative rotation between the first housing 10 and the second housing 20 can be restricted, so that when the user uses the applicator 100, the applicator 100 can only be triggered by pressing the top wall 101 of the first housing 10. It should be noted that when the push block 30 is assembled into the second housing 20, it can also be circumferentially limited with the second housing.

[0053] like Figure 5 As shown, in some embodiments, the push block 30 is provided with a limiting plate 32, which slides in conjunction with the second housing 20 along the movement direction of the trigger member 11. That is, the push block 30 is circumferentially limited and assembled onto the second housing 20, thereby restricting the push block 30 from rotating relative to the second housing 20 during the process of popping out of the second housing 20.

[0054] like Figure 10As shown, in some embodiments, the limiting plate 32 is disposed through the second housing 20; wherein, the limiting plate 32 has a hook portion 321, which can abut against the second housing 20 under the drive of the push block 30, thereby limiting the maximum stroke of the push block 30 when it moves relative to the second housing 20, that is, limiting the push block 30 when it pops out from the second housing 20, thus preventing the push block 30 from detaching from the second housing 20.

[0055] As can be seen from the above, the first elastic element 40 is applied inside the applicator 100 to elastically push the push block 30. Therefore, the first elastic element 40 can be set as a spring. Of course, for those skilled in the art, the first elastic element 40 can also be set as a rubber sleeve, corrugated tube, etc. with higher elasticity.

[0056] It is understood that the probe 51 on the analyte sensor 50 is used to implant into the user's subcutaneous tissue for detecting analytes in the user's body. These analytes may specifically include glucose concentration, acetylcholine, amylase, bilirubin, cholesterol, human chorionic gonadotropin (hCG), creatine kinase (e.g., CK-MB), creatine, DNA, fructosamine, glucose, glutamine, growth hormone, hormones, ketones, lactate, peroxides, prostate-specific antigen (PSA), prothrombin, RNA, thyroid-stimulating hormone (TSH), and / or troponin. Of course, the analyte sensor 50 can also be used to monitor drug concentrations, such as antibiotics (e.g., gentamicin, vancomycin, etc.), digoxin, disused drugs, theophylline, and warfarin.

[0057] like Figure 2 , Figure 6 and Figure 7 As shown, in some embodiments, the applicator 100 further includes a retraction block 60, which is movably mounted on the push block 30. The analyte sensor 50 has a probe 51, and the retraction block 60 is provided with an auxiliary needle 61. The auxiliary needle 61 forms an inwardly accommodating cavity 611, in which the probe 51 is received. This protects the probe 51 on the analyte sensor 50 during implantation into the user's subcutaneous tissue, preventing damage from pressure. It should be noted that the auxiliary needle 61 on the retraction block 60 extends outward relative to the probe 51. Therefore, during the implantation of the probe 51 into the user's subcutaneous tissue, the auxiliary needle 61 can first insert into the subcutaneous tissue, effectively protecting the probe 51.

[0058] For example, the retraction block 60 is mounted on the side of the push block 30 away from the analyte sensor 50, and the auxiliary pin 61 on the retraction block 60 can pass through the push block 30 and at least partially wrap around the probe 51, so that the push block 30 can simultaneously drive the analyte sensor 50 and the retraction block 60 to pop out from the second housing 20 under the push of the first elastic member 40.

[0059] like Figure 2 , Figure 7 , Figure 8 , Figures 10 to 12 As shown, in some embodiments, the applicator 100 further includes a second elastic element 70, which is pre-compressed and installed between the retraction block 60 and the push block 30. The push block 30 is also provided with an elastic claw 33, which can abut against the inner peripheral wall 201 of the second housing 20. A position interference portion exists between the elastic claw 33 and the retraction block 60, and the elastic claw 33 is configured to elastically deform in response to the pushing of the retraction block 60, moving away from the retraction block 60. Thus, the pre-compressed second elastic element 70 can be used to automatically retract the retraction block 60 into the interior of the applicator 100, preventing physical injury and visual impact to the user due to the exposed auxiliary needle 61. It should be noted that the second elastic element 70 is analogous to the first elastic element 40; therefore, the second elastic element 70 can also be a spring, a highly elastic rubber sleeve, a bellows, etc.

[0060] For example, the elastic claw 33 has a bevel 331 that abuts against the retracting block 60 and forms a position interference portion along the direction of movement of the retracting block 60 relative to the pushing block 30.

[0061] It is understandable that the retracting block 60, under the pushing of the pre-compressed second elastic element 70, tends to move relative to the pushing block 30. This allows the elastic claw 33 to have an outward elastic deformation tendency under the drive of the retracting block 60. Since the pushing block 30 compresses the first elastic element 40 and is housed within the second housing 20, the inner peripheral wall 201 of the second housing 20 will abut against the elastic claw 33, restricting the outward expansion and deformation of the elastic claw 33. This allows the applicator 100, in its initial state, to have the elastic claw 33 on the pushing block 30 abut against the inner peripheral wall 201 of the second housing 20. The push block 30 is positioned on the retraction block 60. At the same time, the retraction block 60 is kept in a state of compression of the second elastic member 70 due to the limitation of the inclined surface 331 on the elastic claw 33. When the push block 30 is pushed off the second housing 20 by the first elastic member 40, the elastic claw 33 will disengage from the inner peripheral wall 201 of the second housing 20 under the drive of the push block 30, and release the inner peripheral wall 201 from the outward expansion deformation of the elastic claw 33. Then, the retraction block 60 can disengage from the push block 30 under the push of the pre-compressed second elastic member 70, and realize the automatic retraction of the retraction block 60.

[0062] like Figure 6 As shown, in some embodiments, a groove 621 is provided on the outer peripheral wall 62 of the retraction block 60. The elastic claw 33 slides and engages with the groove 621 along the direction of movement of the retraction block 60 relative to the push block 30, thereby achieving circumferential positioning between the retraction block 60 and the push block 30.

[0063] In summary, as Figure 8 , Figures 10 to 12 As shown, when using the applicator 100, the user can press the top wall 101 of the first housing 10 to drive the trigger 11 toward the hook plate 31. By pushing the hook plate 31 with the trigger 11, the hook plate 31 can be elastically deformed. The deformed hook plate 31 can disengage from the baffle 21 of the second housing 20 and release the locking of the push block 30 on the second housing 20. In this way, the push block 30 can drive the analyzer sensor 50 and the retraction block 60 to pop out from the second housing 20 under the push of the pre-compressed first elastic member 40, and cause the auxiliary needle 61 and probe 51 on the retraction block 60 to be implanted into the user's subcutaneous tissue. Simultaneously, the elastic claw 33 follows the push block 30 to detach from the second housing 20, releasing the restriction of the inner peripheral wall 201 of the second housing 20 on the outward expansion and deformation of the elastic claw 33. That is, the lock between the retraction block 60 and the push block 30 is released, so the retraction block 60 can be pushed upward from the push block 30 and retract into the second housing 20 under the push of the pre-compressed second elastic element 70. In other words, when the user uses the applicator 100, by pressing the top wall 101 of the first housing 10, the first elastic element 40 and the second elastic element 70 can be used to realize the automatic implantation of the probe on the analyzer sensor 50 and the automatic retraction of the auxiliary needle 61 on the retraction block 60.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any appropriate changes and variations made to the above embodiments within the essential spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An applicator, characterized in that, The device includes a first housing (10), a second housing (20), a push block (30), a first elastic element (40), and an analyte sensor (50). The second housing (20) is at least partially housed within the first housing (10) and slidably connected to the push block (30). The push block (30) is provided with a hook plate (31) that can pass through the second housing (20) and engage with it. The first elastic element (40) is pre-compressed and installed between the first housing (10) and the push block (30). The analyte sensor (50) is mounted on the push block (30). A trigger (11) is provided on the top wall (101) of the first housing (10). The trigger (11) extends toward the hook plate (31), and the trigger (11) can drive the hook plate (31) to disengage from the second housing (20) under the action of the top wall (101), so that the push block (30) can drive the analyte sensor (50) to pop out from the second housing (20) under the push of the first elastic member (40) in the pre-compressed state.

2. The applicator according to claim 1, characterized in that, A baffle (21) is formed on the second housing (20), and a hook plate (31) passing through the second housing (20) can be snapped onto the baffle (21); The trigger (11) has a pushing slope (111), and the trigger (11) can push the hook plate (31) away from the baffle (21) through the pushing slope (111) to undergo elastic deformation.

3. The applicator according to claim 1, characterized in that, The top wall (101) is also provided with a fastening element (12), and the second housing (20) is provided with a fastening engagement element (22); along the movement direction of the trigger element (11), the fastening element (12) abuts against the fastening engagement element (22), and the fastening element (12) can undergo elastic deformation under the action of the top wall (101); And / or, the snap fastener (12) can drive the snap fastener (22) to undergo elastic deformation under the action of the top wall (101).

4. The applicator according to claim 1, characterized in that, The first housing (10) is further provided with a positioning member (13), and the second housing (20) is provided with a positioning fitting member (23). Along the movement direction of the trigger member (11), the positioning member (13) and the positioning fitting member (23) are slidably engaged.

5. The applicator according to claim 1, characterized in that, The push block (30) is also provided with a limiting plate (32), which slides in cooperation with the second housing (20) along the movement direction of the trigger (11).

6. The applicator according to claim 5, characterized in that, The limiting plate (32) is disposed through the second housing (20); The limiting plate (32) has a hook portion (321), which can abut against the second housing (20) under the action of the push block (30).

7. The applicator according to claim 1, characterized in that, The applicator (100) further includes a retraction block (60), which is movably mounted on the push block (30); The analyte sensor (50) is provided with a probe (51), and the retraction block (60) is provided with an auxiliary needle (61). The auxiliary needle (61) forms an inwardly accommodating cavity (611), and the probe (51) is housed in the accommodating cavity (611).

8. The applicator according to claim 7, characterized in that, The applicator (100) further includes a second elastic element (70), which is pre-compressed and installed between the retraction block (60) and the push block (30); The push block (30) is also provided with an elastic claw (33), which can abut against the inner peripheral wall (201) of the second housing (20); wherein, there is positional interference between the elastic claw (33) and the retraction block (60), and the elastic claw (33) is configured to elastically deform in a direction away from the retraction block (60) in response to the push of the retraction block (60).

9. The applicator according to claim 8, characterized in that, The elastic claw (33) has a ramp (331) that abuts against the push block (30) in the direction in which the retracting block (60) moves relative to the push block (30).

10. The applicator according to claim 9, characterized in that, A groove (621) is provided on the outer peripheral wall (62) of the retraction block (60). Along the direction of movement of the retraction block (60) relative to the push block (30), the elastic claw (33) can slide and engage with the groove (621).

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