Applicator for an analyte sensor

Abstract

The applicator of the analyte sensor claimed in the present invention includes a housing, an ejection expansion member, a first elastic member and a locking member. The ejection expansion member is slidably installed in the housing, and the first elastic member is disposed between the ejection expansion member and the housing. The locking member is rotatably installed in the housing. Wherein, a position interference portion is formed between the locking member and the ejection expansion member, and the locking member is configured to rotate relative to the housing in response to the push of the position interference portion to control the locking between the ejection expansion member and the locking member. During the locking process of the applicator of the present invention during operation, there is a rigid contact between the ejection expansion member and the locking member, avoiding elastic deformation of components, which can effectively reduce the failure risk caused by elastic deformation of components, improving the reliability and experience of the applicator. At the same time, the applicator has an adaptive assembly locking function, which can improve the convenience of assembly of the applicator.

Description

Technical Field

[0001] The present invention belongs to the technical field related to medical devices, and particularly relates to an applicator for an analyte sensor. Background Art

[0002] An analyte sensor is a device that combines biological components and physicochemical monitors for detection and analysis, preferably a continuous glucose monitor; among them, a continuous glucose monitor is a small-sized minimally invasive wearable device, also known as a Continuous Glucose Monitoring System (CGMS). CGM dynamic blood glucose monitoring refers to the technology of monitoring the change in glucose concentration in interstitial fluid under the skin through a glucose sensor, which can provide continuous, comprehensive, and reliable all-day blood glucose information to understand the blood glucose fluctuation. During monitoring, it is necessary to use an applicator in the continuous glucose monitor to eject a probe with a glucose sensor and attach it to the skin to complete the probe implantation process (referred to as the needle-assisting process), thereby assisting the glucose sensor to monitor the blood glucose value in the subcutaneous tissue. Among them, the ejection switch of the continuous blood glucose monitoring applicator is the key to triggering the entire ejection-needle-assisting process, and it is required that the ejection switch can effectively complete the locking and releasing actions of the ejection structural member, and at the same time be convenient for the user to operate with one hand.

[0003] Currently, the ejection switches of CGM applicators in the existing market usually adopt a snap-type structure, specifically including a sliding snap and a SNAP snap. Among them, when operating the sliding snap-type ejection switch, the user needs to press the outer shell forcefully to deform the cantilever snap structure connected to the outer shell to disengage from the rail limit, and slide relative to other structural members to complete the ejection-needle-assisting process; the SNAP snap-type ejection switch uses plastic male and female snaps. During the locking process, the male snap needs to be press-fitted into the female snap in an interference manner, and during the releasing process, the button needs to be pressed to deform the male snap again to disengage from the female snap to complete the releasing process. However, in the ejection switches with the above two snap-type structures, the locking and releasing processes of the snaps both rely on the elastic deformation of their own structural members, which poses a risk of fatigue damage and hook detachment failure, thus affecting the reliability and experience. Summary of the Invention

[0004] In view of this, it is necessary to provide an applicator for an analyte sensor to solve the above technical problems.

[0005] An applicator for an analyte sensor includes an outer shell, an ejection expansion member, a first elastic member, and a locking member. The ejection expansion member is slidably installed in the outer shell. The first elastic member is disposed on the movement path of the ejection expansion member and abuts against the outer shell and the ejection expansion member respectively. The locking member is rotatably installed in the outer shell.

[0006] Wherein, a position interference portion is formed between the locking member and the ejection expansion member, and the locking member is configured to rotate relative to the housing in response to the push of the position interference portion to control the locking between the ejection expansion member and the locking member.

[0007] In this application, by using the position interference portion between the ejection expansion member and the locking member, the ejection expansion member can drive the rotation of the locking member during the sliding process in the housing, and thereby achieve the locking between the ejection expansion member and the locking member. Furthermore, during the locking process when the applicator operates, the ejection expansion member and the locking member are in rigid contact, avoiding elastic deformation of the components. This can effectively reduce the failure risk caused by the elastic deformation of the components, improving the reliability and experience of the applicator. At the same time, the locking between the locking member and the ejection expansion member is realized by the sliding of the ejection expansion member, enabling the applicator to have an adaptive assembly locking function, which improves the convenience of assembling the applicator.

[0008] In one embodiment, the position interference portion includes a locking pin and inclined teeth. On the movement path of the ejection expansion member, the inclined teeth have a first guiding inclined surface, and through the abutting cooperation between the first guiding inclined surface and the locking pin, the locking member is driven to rotate relative to the housing under the push of the ejection expansion member.

[0009] It can be understood that through the above structural arrangement of the locking pin and the inclined teeth, by using the abutting cooperation between the locking pin and the first guiding inclined surface on the inclined teeth, the ejection expansion member is driven to rotate the locking member during the sliding process in the housing, thereby specifically realizing the structural arrangement of the position interference portion between the ejection expansion member and the locking member, which has the effects of simplifying the structure and facilitating the rotation drive of the locking member by the ejection expansion member during the sliding process.

[0010] In one embodiment, a part of the ejection expansion member is sleeved on the locking member. Wherein, the locking pin is arranged on the ejection expansion member, and the inclined teeth are arranged on the locking member;

[0011] Or, a part of the locking member is sleeved on the ejection expansion member. Wherein, the inclined teeth are arranged on the ejection expansion member, and the locking pin is arranged on the locking member.

[0012] It can be understood that through the above structural arrangement, different embodiments of the ejection expansion member and the locking member in the applicator are specifically realized.

[0013] In one embodiment, a plurality of locking members and limiting bumps are further formed between the ejection expansion member and the locking member. The plurality of limiting bumps are arranged at intervals in sequence along the circumferential direction of the outer shell. Wherein, a channel is formed between two adjacent limiting bumps;

[0014] The locking member can pass through the channel and abut against one of the limiting bumps to lock the ejection expansion member to the locking member.

[0015] It can be understood that through the above structural settings of the limiting bumps and the locking members, and by using the cooperation or non - cooperation between the locking members and the limiting bumps, the locking or unlocking of the ejection expansion member on the locking member is specifically realized. And, by arranging the plurality of limiting bumps at intervals in sequence along the circumferential direction of the outer shell, a circumferential repeating unit is formed between the ejection expansion member and the locking member, and the repeated use of the applicator can be achieved through the continuous rotational movement of the locking member itself, which can improve the reusability of the applicator.

[0016] In one embodiment, a sliding portion is provided on the outer peripheral edge of the ejection expansion member, and a sliding mating portion is provided on the inner peripheral wall of the outer shell. Through the cooperation between the sliding portion and the sliding mating portion, the ejection expansion member is slidably mounted into the outer shell.

[0017] It can be understood that through the above structural settings between the sliding portion and the sliding mating portion, by using the cooperation between the sliding portion and the sliding mating portion, the sliding mounting of the ejection expansion member in the outer shell is specifically realized.

[0018] In one embodiment, a positioning shaft is provided on the outer shell, and a through - hole is formed on the locking member to match the positioning shaft. The positioning shaft penetrates through the through - hole so that the locking member is rotatably mounted on the positioning shaft;

[0019] Wherein, a limiting buckle is provided on the part of the positioning shaft extending out of the through - hole, and the limiting buckle abuts against the locking member to axially limit the locking member to the positioning shaft.

[0020] It can be understood that through the cooperation between the positioning shaft and the through - hole above, and then using the limiting buckle to limit the locking member, the rotational assembly of the locking member in the outer shell is specifically realized.

[0021] In one embodiment, the applicator further includes a button. The button is slidably mounted on the outer shell and cooperates with the locking member. The button can push the locking member to rotate relative to the outer shell to release the locking between the locking member and the ejection expansion member.

[0022] It can be understood that through the structural setting of the above buttons and by using the rotation drive of the buttons on the locking member, the purpose of releasing the lock between the locking member and the ejection expansion member is achieved, so that the ejection expansion member slides relative to the outer shell under the elastic potential energy of the first elastic member, that is, the release of the ejection expansion member during the operation of the applicator is realized.

[0023] In one embodiment, a thimble is provided on the button, and a second guiding inclined surface is provided on the locking member. Through the abutting cooperation between the thimble and the second guiding inclined surface, the button can drive the locking member to rotate relative to the outer shell.

[0024] It can be understood that through the structural setting of the above thimble and the second guiding inclined surface, by using the abutting cooperation between the thimble and the second guiding inclined surface, the driving of the button to rotate the locking member in the outer shell is realized, which has the functions of simplifying the structure and facilitating the rotational drive of the locking member during the movement of the button.

[0025] In one embodiment, the applicator further includes a second elastic member, which is arranged on the movement path of the button and abuts against the outer shell and the button respectively to drive the button to reset elastically.

[0026] It can be understood that through the structural setting of the above second elastic member, by using the structural characteristics of the second elastic member, the button can be reset under the elastic potential energy of the second elastic member when the external force is removed, so as to meet the usage requirements of the repeated use of the applicator.

[0027] In one embodiment, the applicator further includes a sensor, which is arranged inside the outer shell;

[0028] Wherein, the sensor abuts against the ejection expansion member, and under the drive of the ejection expansion member, the probe part on the sensor can extend out of the outer shell.

[0029] It can be understood that through the above structure of the sensor, the usage requirements of applying the applicator to an applicator for an analyte sensor can be met.

[0030] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0031] The applicator of the analyte sensor of the present invention utilizes the position interference part between the ejection expansion member and the locking member, so that during the sliding process of the ejection expansion member in the outer shell, the rotation of the locking member can be driven, and thereby the locking between the ejection expansion member and the locking member can be realized. Furthermore, during the locking process when the applicator operates, the ejection expansion member and the locking member are in rigid contact, avoiding elastic deformation of the components. In this way, the failure risk caused by the elastic deformation of the components can be effectively reduced, improving the reliability and experience of the applicator. At the same time, the locking between the locking member and the ejection expansion member is realized by the sliding of the ejection expansion member, enabling the applicator to have an adaptive assembly locking function, which improves the convenience of assembling the applicator. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0033] Figure 1 It is an exploded view of the applicator of the analyte sensor provided by the first embodiment of the present application;

[0034] Figure 2 It is a cross-sectional view of the applicator of the analyte sensor provided by the first embodiment of the present application;

[0035] Figure 3 It is a schematic structural diagram of the outer shell in the present application;

[0036] Figure 4 It is a schematic structural diagram of the outer shell from another perspective in the first embodiment of the present application;

[0037] Figure 5 It is a schematic structural diagram of the ejection expansion member in the first embodiment of the present application;

[0038] Figure 6 It is a schematic structural diagram of the locking member in the first embodiment of the present application;

[0039] Figure 7 It is a schematic structural diagram of the button in the first embodiment of the present application;

[0040] Figure 8 、 Figure 9 、 Figure 10 and Figure 11 It is a schematic diagram of the movement trajectory of the locking pin during its movement in the locking member in the first embodiment of the present application;

[0041] Figure 12A cross-sectional view of the applicator of the analyte sensor provided in the second embodiment of the present application.

[0042] Reference numerals: 100, applicator; 10, housing; 11, inner peripheral wall; 111, sliding fit portion; 1111, rib; 12, positioning shaft; 121, limiting buckle; 13, buckle groove; 20, ejection expansion member; 21, locking pin; 22, outer peripheral edge; 221, sliding portion; 2211, groove; 30, first elastic member; 40, locking member; 41, inclined tooth; 411, first guiding inclined surface; 412, second guiding inclined surface; 42, limiting protrusion; 421, channel; 422, limiting groove; 43, through hole; 50, button; 51, ejector pin; 52, buckle; 53, limiting protrusion; 60, second elastic member; 70, sensor; 71, probe; 80, sealing cover. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] It should be noted that when an element is referred to as being "provided on" another element, it can be directly provided on the other element or there may also be an intermediate element. When an element is considered to be "provided on" another element, it can be directly provided on the other element or there may be an intermediate element at the same time. When an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there may be an intermediate element at the same time.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0046] The applicator 100 of the analyte sensor claimed in the present application is applied to a blood glucose monitor, specifically for implanting the probe 71 on the sensor 70 for detecting blood glucose into the skin of a user. Of course, for those skilled in the art, the sensor 70 of the applicator 100 is not limited to detecting the blood glucose of the user, and can also be used to detect ketone, lactate, oxygen, hemoglobin A1C, etc. of the user, which can be specifically achieved by replacing the sensor 70, and will not be elaborated herein.

[0047] As Figure 1 , Figure 2 shown, the applicator 100 provided by the first embodiment of the present application includes a housing 10, an ejection expansion member 20, a first elastic member 30 and a locking member 40. The ejection expansion member 20 is slidably installed in the housing 10. The first elastic member 30 is disposed on the movement path of the ejection expansion member 20 and abuts against the housing 10 and the ejection expansion member 20 respectively. The locking member 40 is rotatably installed in the housing 10. Wherein, an external interference portion is formed between the locking member 40 and the ejection expansion member 20, and the locking member 40 is configured to rotate relative to the housing 10 in response to the pushing of the position interference portion to control the locking between the ejection expansion member 20 and the locking member 40. That is to say, during the process that the ejection expansion member 20 slides in the housing 10 and compresses the first elastic member 30, the ejection expansion member 20 can drive the locking member 40 to rotate in the housing 10 by using the position interference portion therebetween, and the rotated locking member 40 can be used to lock the ejection expansion member 20. It should be noted that the above first elastic member 30 is set as a spring, an elastic rubber sleeve, etc.

[0048] It can be understood that during the locking process of the applicator 100 in this embodiment, the contact between the ejection expansion member 20 and the locking member 40 is rigid, avoiding elastic deformation of the components. This can effectively reduce the failure risk caused by the elastic deformation of the components, improving the reliability and experience of the applicator 100. At the same time, the locking between the locking member 40 and the ejection expansion member 20 is realized by the sliding of the ejection expansion member 20, making the applicator 100 have an adaptive assembly locking function, which can improve the assembly convenience of the applicator 100.

[0049] As Figure 3 , Figure 5 shown, a sliding portion 221 is provided on the outer peripheral edge 22 of the ejection expansion member 20, and a sliding mating portion 111 is provided on the inner peripheral wall 11 of the housing 10. Through the cooperation between the sliding portion 221 and the sliding mating portion 111, the ejection expansion member 20 is slidably installed in the housing 10, specifically realizing the sliding connection of the ejection expansion member 20 on the housing 10, so that the ejection expansion member 20 can only axially slide in the housing 10 to compress the first elastic member 30 under the drive of an external force.

[0050] Specifically, the sliding part 221 is set as the groove 2211 formed on the outer peripheral edge 22 of the elastic expansion member 20, the sliding mating part 111 is set as the rib 1111 on the inner peripheral wall 11 of the housing 10, and the number of the groove 2211 and the rib 1111 is set to three. Of course, the number of the groove 2211 and the rib 1111 is not limited to three groups, and the two can be set to two groups, four groups, or even more groups. For those skilled in the art, the sliding part 221 can also be set as the rib, and the sliding mating part 111 can be set as the groove, which will not be elaborated here.

[0051] As Figure 4 , Figure 6 shown, a positioning shaft 12 is further provided on the housing 10, and a through hole 43 is formed on the locking member 40 for matching the positioning shaft 12. The positioning shaft 12 penetrates through the through hole 43 so that the locking member 40 is rotatably mounted on the positioning shaft 12. Among them, a limit buckle 121 is provided on the part of the positioning shaft 12 extending out of the through hole 43, and the limit buckle 121 abuts against the locking member 40 to axially limit the locking member 40 to the positioning shaft 12, thus specifically realizing the rotational connection of the locking member 40 in the housing 10. It should be noted that the above limit buckle 121 can specifically be set as a convex buckle with a certain elasticity to meet the use requirements for the assembly of the locking member 40 on the positioning shaft 12 of the housing 10. Of course, the number of the limit buckles 121 can be set to two, three, or even more according to the use requirements, which will not be elaborated here.

[0052] As Figure 5 , Figure 6 shown, the position interference part formed between the elastic expansion member 20 and the locking member 40 of the applicator 100 includes a locking pin 21 and an inclined tooth 41. On the movement path of the elastic expansion member 20, the inclined tooth 41 has a first guiding inclined surface 411. Through the abutting cooperation between the first guiding inclined surface 411 and the locking pin 21, using the structural characteristics of the first guiding inclined surface 411, the acting force of the locking pin 21 pushing against the first guiding inclined surface 411 of the inclined tooth 41 is decomposed. Then, combined with the axial limitation of the locking member 40 in the housing 10, it can be realized that the locking member 40 can be driven to rotate relative to the housing 10 under the push of the elastic expansion member 20, thereby specifically realizing the structural setting of the position interference part between the elastic expansion member 20 and the locking member 40, which has the functions of simplifying the structure and facilitating the rotational drive of the locking member 40 by the elastic expansion member 20.

[0053] Specifically, in the applicator 100 of this embodiment, the ejection expansion member 20 partially sleeved on the device locking member 40, wherein the locking pin 21 is arranged on the ejection expansion member 20, and the inclined teeth 41 are arranged on the locking member 40. It should be noted that the locking pin 21 on the ejection expansion member 20 of the applicator 100 can be arranged to fit on the outer peripheral wall of the locking member 40, and the inclined teeth 41 on the locking member 40 are specifically arranged in an annular structure to meet the purpose of unlocking the ejection expansion member 20 with the locking member 40 subsequently.

[0054] A plurality of limiting bumps 42 and locking members are further formed between the ejection expansion member 20 and the locking member 40 in the applicator 100. The plurality of limiting bumps 42 are arranged at intervals in sequence along the circumferential direction of the outer shell 10. Among them, a channel 421 is formed between two adjacent limiting bumps 42. The locking member can pass through the channel 421 and abut against one of the limiting bumps 42 to lock the ejection expansion member 20 to the locking member 40. That is to say, the ejection expansion member 20 can drive the locking member to first pass through the channel 421 and pass through the limiting bump 42, and then under the drive of the rotation of the locking member 40, the circumferential position of the locking member and the limiting bump 42 will change, so that when the ejection expansion member 20 is reset under the elastic push of the first elastic member 30, the locking member can abut against one of the limiting bumps 42, that is, to realize the locking of the ejection expansion member 20 on the locking member 40. It should be noted that a limiting groove 422 is formed on one end face of the limiting bump 42 facing the direction of the inclined teeth 41, so that the limiting bump 42 can abut against the locking member with the limiting groove 422 to realize the locking between the ejection expansion member 20 and the locking member 40.

[0055] Specifically, the locking member of this embodiment is arranged on the ejection expansion member 20, and the locking member is specifically set as the above-mentioned locking pin 21; the plurality of limiting bumps 42 are arranged on the locking member 40, specifically on the outer peripheral wall of the locking member 40. Of course, for those skilled in the art, the locking member and the locking pin 21 can be set as two independent components, which will not be elaborated here.

[0056] It can be understood that arranging the plurality of limiting bumps 42 at intervals in sequence along the circumferential direction of the outer shell 10 enables a circumferential repeating unit between the ejection expansion member 20 and the locking member 40, and the purpose of repeated use of the applicator 100 can be achieved through the continuous rotational movement of the locking member 40 itself, which can improve the reusability of the applicator 100.

[0057] It should be noted that the number of locking pins 21 on the ejection and expansion member 20 in the applicator 100 is three, the number of inclined teeth 41 on the locking member 40 is six, and the number of limiting bumps 42 is six. The six limiting bumps 42 are spaced apart in pairs to form six channels 421. The three locking pins 21 can be in abutting cooperation with the corresponding three limiting bumps 42 at the same time, which can improve the stability when the ejection and expansion member 20 is in locking cooperation with the locking member 40. Of course, the number of locking pins 21 on the ejection and expansion member 20, the number of inclined teeth 41 and limiting bumps 42 on the locking member 40 is not limited to that shown in the figure. For those skilled in the art, the number of locking pins 21 can be set to two, and the number of inclined teeth 41 and limiting bumps 42 can both be set to four. Or, the number of locking pins 21 can be set to four, and the number of inclined teeth 41 and limiting bumps 42 can both be set to eight, which will not be elaborated here.

[0058] As Figure 1 , Figure 2 shown, the applicator 100 further includes a button 50. The button 50 is slidably mounted on the housing 10 and cooperates with the locking member 40. The button 50 can push the locking member 40 to rotate relative to the housing 10 to release the locking between the locking member 40 and the ejection and expansion member 20. That is to say, the applicator 100 can use the button 50 to drive the rotation of the locking member 40 and achieve the purpose of releasing the locking between the locking member 40 and the ejection and expansion member 20, so that the ejection and expansion member 20 slides relative to the housing 10 under the elastic potential energy of the first elastic member 30, that is, to realize the release of the ejection and expansion member 20 when the applicator 100 works.

[0059] As Figure 6 , Figure 7 shown, a thimble 51 is provided on the button 50, and a second guiding inclined surface 412 is provided on the locking member 40. Through the abutting cooperation between the thimble 51 and the second guiding inclined surface 412, and using the structural characteristics of the second guiding inclined surface 412, the button 50 can drive the locking member 40 to rotate relative to the housing 10, which has the effect of simplifying the structure and facilitating the button 50 to drive the rotation of the locking member 40 during movement. It should be noted that the number of thimbles 51 and the second guiding inclined surfaces 412 is multiple, and the two correspond to each other, so that the button 50 can drive the rotation of the locking member 40 through the abutting cooperation between the thimble 51 and the second guiding inclined surface 412.

[0060] Preferably, the second guiding inclined surface 412 is provided on the inclined teeth 41, which has the effect of simplifying the structure of the locking member 40. Of course, in order to realize the setting of the second guiding inclined surface 412 on the locking member 40, a component independent of the inclined teeth 41 can also be separately provided on the locking member 40, which will not be elaborated here.

[0061] Among them, a buckle 52 is provided on the button 50, and a buckle groove 13 matching the buckle 52 is formed on the outer shell 10. Through the cooperation between the buckle 52 and the buckle groove 13, the button 50 is limited to the outer shell 10, so as to prevent the button 50 from detaching from the outer shell 10. It should be noted that the length of the buckle groove 13 is greater than the length of the buckle 52, so that the button 50 can slide axially on the outer shell 10.

[0062] As Figure 1 、 Figure 2 shown, the applicator 100 further includes a second elastic member 60. The second elastic member 60 is disposed on the movement path of the button 50 and abuts against the outer shell 10 and the button 50 respectively, so as to drive the button 50 to reset elastically. In this way, by utilizing the structural characteristics of the second elastic member 60, the button 50 can be reset under the action of the elastic potential energy of the second elastic member 60 when the external force is released, so as to meet the usage requirement of the repeated use of the applicator 100. It should be noted that the above-mentioned second elastic member 60 is specifically set as a spring, an elastic rubber sleeve, etc.

[0063] As Figure 7 shown, a limiting convex column 53 is provided on the button 50, and the second elastic member 60 is sleeved on the limiting convex column 53. By utilizing the cooperation between the limiting convex column 53 and the second elastic member 60, the second elastic member 60 can be prevented from moving left and right during the process of being compressed by the button 50, thereby ensuring the effective rebound of the second elastic member 60.

[0064] As Figure 1 、 Figure 2 shown, the applicator 100 further includes a sensor 70. The sensor 70 is disposed inside the outer shell 10; among them, the sensor 70 abuts against the ejection and expansion member 20, and under the drive of the ejection and expansion member 20, the probe 71 part of the sensor 70 can extend out of the outer shell 10, so as to meet the usage requirement of the applicator for an analyte sensor.

[0065] In addition, the applicator 100 further includes a sealing cover 80. The sealing cover 80 is installed on the outer shell 10 to cover the sensor 70 inside the outer shell 10. It should be noted that a medical adhesive tape (not shown in the figure) or a medical non-woven fabric (not shown in the figure) is connected to the sealing cover 80, so that the probe 71 on the sensor 70 can pierce the corresponding medical adhesive tape (not shown in the figure) or medical non-woven fabric (not shown in the figure) and be firmly inserted into the skin surface of the user.

[0066] As Figures 8 to 11As shown, when the user uses the applicator 100, first drive the ejection and expansion member 20 to compress the first elastic member 30 and move in the direction of the locking member 40. During this process, the locking pin 21 on the ejection and expansion member 20 can pass through the channel 421 between two adjacent limiting bumps 42 and abut against the first guiding inclined surface 411 of the inclined teeth 41 on the locking member 40. By using the inclined surface characteristic of the first guiding inclined surface 411, while the ejection and expansion member 20 drives the locking pin 21 to continue moving, it can realize the driving of the locking member 40 to rotate within the outer shell 10; thus, when the ejection and expansion member 20 loses the external force and is driven by the compressed first elastic member 30 to move in the reverse direction, the locking pin 21 on the ejection and expansion member 20 can abut against the corresponding limiting bump 42, and achieve the purpose of locking the ejection and expansion member 20 on the locking member 40; after that, press the button 50. Under the abutting and cooperating between the ejector pin 51 on the button 50 and the second guiding inclined surface 412 on the inclined teeth 41, the rotation driving of the locking member 40 is realized again. The locking pin 21 can drive the ejection and expansion member 20 to make a telescopic movement relative to the outer shell 10 under the pushing of the limiting bump 42, so that the locking pin 21 can disengage from the position where the limiting bump 42 is located, that is, achieve the release of the limitation of the limiting bump 42 on the locking pin 21. In this way, the ejection and expansion member 20 can drive the sensor 70 to slide within the outer shell 10 under the pushing of the first elastic member 30, and make the probe 71 on the sensor 70 partially extend out of the sealing cover 80. At the same time, the second elastic member 60 will drive the button 50 to perform elastic reset.

[0067] As Figure 12 shown, the applicator 100 provided in the second embodiment of the present application has basically the same structural composition and working principle as the applicator 100 in the first embodiment of the present application. The difference between the two is that: in this embodiment, a part of the locking member 40 is sleeved on the ejection and expansion member 20, and a position interference part is formed between the locking member 40 and the ejection and expansion member 20. The locking pin 21 in the position interference part is arranged on the locking member 40, and the inclined teeth 41 are arranged on the ejection and expansion member 20.

[0068] In addition, a blood glucose monitor provided in an embodiment of the present application includes a monitor main body (not shown in the figure) and the above-mentioned applicator 100, and the applicator 100 is installed on the monitor main body.

[0069] In summary, during the locking process of the applicator 100 of the present invention, there is a rigid contact between the ejection expansion member 20 and the locking member 40 during operation, avoiding elastic deformation of components. This can effectively reduce the failure risk caused by elastic deformation of components, improving the reliability and user experience of the applicator 100. At the same time, the applicator 100 has an adaptive assembly locking function, which improves the convenience of assembling the applicator 100. By continuously rotating the locking member 40, the loading-locking-release process of the ejection expansion member 20 is repeated, thereby improving the reusability of the applicator 100.

[0070] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

[0071] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as appropriate changes and variations are made within the spirit of the present invention, they fall within the scope of protection required by the present invention.

Claims

1. An applicator for an analyte sensor, characterized in that, It includes a housing (10), an ejection and expansion member (20), a first elastic member (30), and a locking member (40). The ejection and expansion member (20) is slidably mounted within the housing (10). The first elastic member (30) is disposed on the movement path of the ejection and expansion member (20) and abuts against the housing (10) and the ejection and expansion member (20) respectively. The locking member (40) is rotatably mounted within the housing (10). Wherein, a position interference portion is formed between the locking member (40) and the ejection and expansion member (20), and the locking member (40) is configured to rotate relative to the housing (10) in response to the push of the position interference portion to control the locking between the ejection and expansion member (20) and the locking member (40). The position interference portion includes a locking pin (21) and an inclined tooth (41). On the movement path of the ejection and expansion member (20), the inclined tooth (41) has a first guiding inclined surface (411). The first guiding inclined surface (411) is in abutting cooperation with the locking pin (21) to drive the locking member (40) to rotate relative to the housing (10) under the push of the ejection and expansion member (20).

2. The applicator for an analyte sensor according to claim 1, wherein, A part of the ejection and expansion member (20) is sleeved on the locking member (40). Wherein, the locking pin (21) is disposed on the ejection and expansion member (20), and the inclined tooth (41) is disposed on the locking member (40). Alternatively, a part of the locking member (40) is sleeved on the ejection and expansion member (20). Wherein, the inclined tooth (41) is disposed on the ejection and expansion member (20), and the locking pin (21) is disposed on the locking member (40).

3. The applicator for an analyte sensor according to claim 1, wherein A locking member and a plurality of limiting protrusions (42) are further formed between the ejection and expansion member (20) and the locking member (40). The plurality of limiting protrusions (42) are arranged at intervals in sequence along the circumferential direction of the housing (10). Wherein, a channel (421) is formed between two adjacent limiting protrusions (42). The locking member can pass through the channel (421) and abut against one of the limiting protrusions (42) to lock the ejection and expansion member (20) to the locking member (40).

4. The applicator for an analyte sensor according to claim 1, wherein A sliding portion (221) is provided on the outer peripheral edge (22) of the ejection and expansion member (20), and a sliding mating portion (111) is provided on the inner peripheral wall (11) of the housing (10). Through the cooperation between the sliding portion (221) and the sliding mating portion (111), the ejection and expansion member (20) is slidably mounted within the housing (10).

5. The applicator for an analyte sensor according to claim 1, wherein A positioning shaft (12) is provided on the housing (10), and a through hole (43) is formed on the locking member (40) for matching the positioning shaft (12). The positioning shaft (12) passes through the through hole (43) so that the locking member (40) is rotatably mounted on the positioning shaft (12). Wherein, a limit buckle (121) is provided on the part of the positioning shaft (12) extending out of the through hole (43), and the limit buckle (121) abuts against the locking member (40) to axially limit the locking member (40) to the positioning shaft (12).

6. The applicator for an analyte sensor according to claim 1, characterized in that, The applicator (100) further includes a button (50), the button (50) is slidably mounted on the housing (10) and cooperates with the locking member (40), and the button (50) can push the locking member (40) to rotate relative to the housing (10) to release the lock between the locking member (40) and the ejection expansion member (20).

7. The applicator of the analyte sensor according to claim 6, characterized in that, A thimble (51) is provided on the button (50), and a second guiding inclined surface (412) is provided on the locking member (40). Through the abutting cooperation between the thimble (51) and the second guiding inclined surface (412), the button (50) can drive the locking member (40) to rotate relative to the housing (10).

8. The applicator for an analyte sensor according to claim 6, wherein The applicator (100) further includes a second elastic member (60), the second elastic member (60) is arranged on the movement path of the button (50) and abuts against the housing (10) and the button (50) respectively to drive the button (50) to reset elastically.

9. The applicator for an analyte sensor according to claim 1, characterized in that, The applicator (100) further includes a sensor (70), and the sensor (70) is arranged inside the housing (10); Wherein, the sensor (70) abuts against the ejection expansion member (20), and driven by the ejection expansion member (20), the probe (71) part of the sensor (70) can extend out of the housing (10).

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