Applicator for inserting in-vivo analyte sensor

Abstract

Disclosed is an applicator for inserting an in-vivo analyte sensor. The applicator comprises a base body, a contact element, an emitter support, a locking part, a guide needle support, an elastic element, an emitter, and a guide needle. The contact element is movably connected to the base body. The emitter support is connected to the base body. The locking part is arranged on the emitter support or the base body. The locking part is in contact with the guide needle support and configured for locking the guide needle support on the emitter support. The contact element is provided with an unlocking part, and the base body is configured to selectively move towards or away from a contact side of the contact element. The present application does not require assembly before use, which is beneficial to simplifying the structure of the applicator and the operation process by the user. In the process of use, the contact element is made in close contact with the skin, and the base body is pressed to unlock the guide needle support, thereby driving the retrieval of the guide needle through the elastic element. The present application requires no additional guide needle retrieval operations, thus making the retrieval process of the guide needle more reliable.

Description

Applicator for inserting an analyte sensor into the body Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an applicator for inserting an analyte sensor into a body. Background Art

[0002] As people's material well-being improves, the number of people with diabetes is also increasing. Diabetes can cause numerous complications, including coma, poisoning, neuropathy, and cardiovascular and cerebrovascular disease. Therefore, diabetic patients need to know whether their glucose levels are within a safe range. However, traditional measurement methods are cumbersome, require deep wounds, are painful, and can only measure a single value, making it difficult for diabetic patients to understand their glucose levels in real time. To enable diabetic patients to understand their glucose levels in real time, some choose to wear analyte sensors. These sensors require an injection device (applicator) to insert the analyte sensor into the body through the sharp object (introducer needle) of the injection device, allowing the analyte sensor to come into contact with body fluids.

[0003] However, most existing injection devices consist of two components: a needle inserter and a transmitter. The user assembles the two components, which increases user difficulty. Lack of training, a complex pre-installation process, and insufficient hands-on skills can easily lead to failed analyte sensor insertion. Furthermore, due to user experience, it can be difficult to determine whether the sharp tip of the injection device is properly inserted, which can lead to premature retraction of the tip before the sensor can be properly implanted. Therefore, an applicator with a simpler structure and operation, and more reliable sharp tip retraction, is urgently needed. Technical issues

[0004] The main purpose of the present invention is to provide an applicator with simpler structure and operation process and more reliable recovery of sharp objects. Technical Solutions

[0005] In one embodiment, an applicator for inserting an analyte sensor into an in vivo body is provided, comprising:

[0006] matrix;

[0007] A contact member, the contact member being movably connected to the base, wherein the side of the contact member facing the human body is a contact side;

[0008] a transmitter bracket, the transmitter bracket being connected to the base;

[0009] a locking portion, the locking portion being provided on the transmitter bracket or the base;

[0010] a guide needle bracket, the guide needle bracket being arranged on the transmitter bracket, the locking portion being in contact with the guide needle bracket to lock the guide needle bracket on the transmitter bracket;

[0011] elastic parts;

[0012] a transmitter connected to the transmitter bracket;

[0013] a guide needle connected to the guide needle bracket;

[0014] In which, the contact piece has an unlocking part, and the base can move close to the contact side to drive the unlocking part to contact the launcher bracket to release the locking part from the guide needle bracket; the elastic piece is used to drive the guide needle bracket to move away from the launcher bracket when the locking part is unlocked, so as to drive the guide needle to be pulled out of the human body.

[0015] In one embodiment, the locking portion is engaged with the guide needle bracket.

[0016] In one embodiment, the locking portion includes an elastic arm and a locking buckle, the locking buckle is protruded from the elastic arm, and the locking buckle is engaged with the guide needle bracket; when the unlocking portion contacts the elastic arm, it drives the elastic arm to undergo elastic deformation, so that the locking buckle is disengaged from the guide needle bracket.

[0017] In one embodiment, the end of the elastic arm has a bent portion bent toward the inner wall of the base, and the bent portion is used to contact the unlocking portion to release the locking buckle from the guide needle bracket.

[0018] In one embodiment, the transmitter bracket further includes a transmitter mounting portion, the transmitter is connected to the transmitter mounting portion, and the guide needle bracket is arranged on the side of the transmitter mounting portion facing the base; one end of the elastic arm is connected to the side of the transmitter mounting portion facing the base, and the other end passes through the guide needle bracket; the locking buckle is located on the side wall of the elastic arm facing the guide needle bracket, and the locking buckle is clamped with the top of the guide needle bracket; the bending portion is located at the end of the elastic arm away from the guide needle bracket.

[0019] In one embodiment, a plurality of the locking portions are arranged around the center of the transmitter mounting portion, a plurality of the unlocking portions are provided on the contact member, and the plurality of the unlocking portions are arranged in a one-to-one correspondence with the plurality of the mounting portions.

[0020] In one embodiment, when the unlocking portion contacts the bending portion, it drives the elastic arm to shrink away from one end of the transmitter mounting portion toward the center of the transmitter mounting portion, so as to cushion the movement of the guide needle bracket away from the transmitter mounting portion.

[0021] In one embodiment, the base has a accommodating cavity, the accommodating cavity has a first opening on a side facing the human body, and the contact piece is movably arranged in the accommodating cavity; when the base moves toward or away from the contact side, the contact piece is retracted into or extended from the accommodating cavity from the first opening; and when the base moves toward the contact side, it first drives the guide needle and a part of the transmitter to be inserted into the human body, and then releases the locking part from the guide needle bracket.

[0022] In one embodiment, the inner wall of the accommodating cavity is provided with a first limiting groove, which extends in a direction perpendicular to the first opening; the contact piece includes a contact body and a limiting portion, the limiting portion is connected to the contact body, and the limiting portion is movably arranged in the limiting groove to guide the contact body to move along the extension direction of the limiting groove.

[0023] In one embodiment, the inner wall of the accommodating cavity is provided with a resistance rib, and the contact piece includes a contact body and a resistance arm. The contact body is movably connected to the inner wall of the accommodating cavity, one end of the resistance arm is connected to the contact body, and the other end is provided with a resistance arm buckle, and the resistance arm buckle is used to cooperate with the resistance rib.

[0024] In one embodiment, the inner wall of the accommodating cavity is provided with a first positioning arm, and the first positioning arm is provided with a positioning groove; the transmitter bracket includes a transmitter mounting portion and a second positioning arm, one end of the second positioning arm is connected to the transmitter mounting portion, and the other end is provided with a positioning arm buckle, and the positioning arm buckle is clamped with the positioning groove.

[0025] In one embodiment, a cover is further included, which is detachably connected to the base to close the first opening.

[0026] In one embodiment, the emitter bracket includes an emitter mounting portion, and the emitter mounting portion has a mounting groove on a side facing the first opening. The emitter is installed in the sensor mounting groove, the guide needle passes through the middle of the emitter, and the analyte sensor of the emitter is arranged in the guide needle.

[0027] In one embodiment, the guide needle bracket is arranged on the side of the transmitter mounting portion facing away from the first opening, the guide needle bracket has a accommodating cavity, and the accommodating cavity has a second opening on the side facing the transmitter mounting portion; the elastic member is arranged in the accommodating cavity, one end of the elastic member abuts against the inner wall of the guide needle bracket, and the other end abuts against the transmitter mounting portion.

[0028] In one embodiment, a connecting arm is provided in the middle of the guide needle bracket, a connecting buckle is provided on the connecting arm, and a connecting groove is provided at the tail end of the guide needle, and the connecting groove is engaged with the connecting buckle; the transmitter mounting part has a connecting through hole arranged opposite to the connecting arm, and the guide needle passes through the transmitter mounting part from the connecting through hole.

[0029] In one embodiment, a plurality of first clearance holes are provided on a side of the guide needle bracket away from the second opening, the locking portion includes an elastic arm, and the first clearance holes are used for the elastic arm to pass through.

[0030] In one embodiment, a second limiting groove is provided on the inner side wall of the guide needle bracket, and the extension direction of the second limiting groove is perpendicular to the second opening; the locking portion includes an elastic arm, and the second limiting groove is used to cooperate with the elastic arm to guide the guide needle bracket to move in a direction perpendicular to the second opening.

[0031] In one embodiment, a mounting arm is provided on the side wall of the mounting slot, a mounting buckle is provided on the side of the mounting arm facing the transmitter, a connecting slot corresponding to the connecting buckle is provided on the transmitter, and the mounting buckle is connected to the connecting slot.

[0032] In one embodiment, the contact piece has an inner cavity, and the inner cavity has a third opening on the side facing the human body; the transmitter mounting portion and the guide needle bracket are located in the inner cavity; a through hole is provided on the side of the contact piece away from the third opening, and the guide needle bracket is located in the through hole, and the through hole is used for the guide needle bracket to move away from the transmitter mounting portion.

[0033] In one embodiment, a plurality of second clearance holes are provided on a side of the contact member away from the third opening, the base body includes a first positioning arm, and the second clearance holes are used for the first positioning arm to pass through.

[0034] In one embodiment, the inner wall of the contact piece further has a limiting structure, and the limiting structure is used to cooperate with the transmitter bracket and / or the guide needle bracket. Beneficial effects

[0035] According to the above-described embodiment, an applicator for inserting an analyte sensor into the body comprises a base, a contact member, a locking portion, a transmitter holder, a guide needle holder, an elastic member, a transmitter, and a guide needle. The contact member is movably connected to the base, with the side of the contact member facing the human body being the contact side. The transmitter holder is connected to the base, and the locking portion is disposed on the transmitter holder or the base. The guide needle holder is disposed on the transmitter holder, and the locking portion contacts the guide needle holder to lock the guide needle holder to the transmitter holder. The transmitter is connected to the transmitter holder, and the guide needle is connected to the guide needle holder. The contact member has an unlocking portion, and the base can move toward the contact side, driving the unlocking portion to contact the transmitter holder, thereby releasing the locking portion from the guide needle holder. The elastic member is used to drive the guide needle holder to move away from the transmitter holder when the locking portion is unlocked, thereby driving the guide needle holder to be withdrawn from the human body. On the one hand, the transmitter and guide needle are pre-installed on the transmitter bracket and the guide needle bracket respectively, eliminating the need for the user to assemble them before use, thereby simplifying the structure of the applicator and the user's operation process. On the other hand, during use, the user places the contact piece close to the human skin and presses the base. When the base moves closer to the contact side, it drives the guide needle and part of the transmitter into the human body, and drives the unlocking part to contact the transmitter bracket to unlock the guide needle bracket, thereby driving the guide needle to be recovered through the elastic restoring force of the elastic part. The entire operation process does not require the user to judge whether the guide needle is inserted in place, nor does it require additional operations to recover the guide needle, which reduces the user's subjective judgment and operational errors, making the guide needle recovery process more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG1 is a schematic structural diagram of an applicator in a closed state according to an embodiment of the present application;

[0037] FIG2 is a schematic diagram of the structure of the applicator after the cover is removed in one embodiment of the present application;

[0038] FIG3 is a cross-sectional view of an applicator in a closed state according to an embodiment of the present application;

[0039] FIG4 is a cross-sectional view of the applicator after the cover is removed in one embodiment of the present application;

[0040] FIG5 is a cross-sectional view of the applicator when the guide needle contacts the skin in one embodiment of the present application;

[0041] FIG6 is a cross-sectional view of the applicator when the guide needle is inserted into the skin according to one embodiment of the present application;

[0042] FIG7 is a schematic structural diagram of a substrate in one embodiment of the present application;

[0043] FIG8 is a schematic structural diagram of a cover body in one embodiment of the present application;

[0044] FIG9 is a schematic structural diagram of a transmitter bracket from one perspective in one embodiment of the present application;

[0045] FIG10 is a schematic structural diagram of a transmitter bracket from another perspective in one embodiment of the present application;

[0046] FIG11 is a schematic diagram of the internal structure of the guide needle bracket according to an embodiment of the present application;

[0047] FIG12 is a schematic structural diagram of the back of the guide needle bracket according to an embodiment of the present application;

[0048] FIG13 is a schematic diagram of the structure of the exterior of a contact member in one embodiment of the present application;

[0049] FIG14 is a schematic diagram of the structure inside the contact member in one embodiment of the present application;

[0050] FIG15 is a schematic diagram of the structure of a transmitter and a guide needle in one embodiment of the present application;

[0051] FIG16 is a cross-sectional view of an applicator after removing the cover in another embodiment of the present application;

[0052] Figure numerals: 100, base; 110, accommodating cavity; 120, first opening; 130, first limiting groove; 140, convex strip; 150, first positioning arm; 151, positioning groove; 160, base limiting rib; 170, resistance rib; 200, contact piece; 210, contact side; 220, unlocking part; 230, contact body; 240, resistance arm; 241, resistance arm buckle; 250, inner cavity; 260, third opening; 270, through hole; 280, second clearance hole; 290, limiting structure; 291, columnar limiting rib; 292, limiting rib with inclined surface; 2010, limiting part; 300, transmitter bracket; 310, locking part; 311, Elastic arm; 312, locking buckle; 313, bending portion; 320, transmitter mounting portion; 321, mounting slot; 322, mounting arm; 323, mounting buckle; 324, snap-in slot; 325, connecting through hole; 330, second positioning arm; 331, positioning arm buckle; 400, guide needle bracket; 410, accommodating cavity; 420, second opening; 430, connecting arm; 431, connecting buckle; 440, first clearance hole; 450, second limiting slot; 500, elastic part; 600, transmitter; 610, medical adhesive tape; 620, analyte sensor; 630, snap-in slot; 700, guide needle; 710, connecting slot; 800, cover body; 810, limiting surface of cover body. Modes for Carrying Out the Invention

[0053] The present invention will be further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions, and for those skilled in the art, it is not necessary to describe these related operations in detail. They will fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0054] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0055] Component numbers used herein, such as "first" and "second," are used solely to distinguish the components being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0056] The present embodiment provides an applicator for inserting an analyte sensor into an in vivo body.

[0057] 1-16 , the applicator includes a base 100 , a contact member 200 , a transmitter bracket 300 , a locking portion 310 , an introducer needle bracket 400 , an elastic member 500 , a transmitter 600 , and an introducer needle 700 .

[0058] The contact member 200 is movably connected to the base 100, with the side of the contact member 200 facing the human body being the contact side 210. The emitter holder 300 is connected to the base 100, and a locking portion 310 is provided on the emitter holder 300 or the base 100. The guide needle holder 400 is provided on the emitter holder 300, and the locking portion 310 contacts the guide needle holder 400 to lock the guide needle holder 400 to the emitter holder 300. The elastic member 500 is provided between the analyte sensor 600 and the guide needle holder 400. The emitter 600 is connected to the emitter holder 300, and the guide needle 700 is connected to the guide needle holder 400. The contact member 200 has an unlocking portion 220. The base 100 is configured to selectively move toward or away from the contact side 210 of the contact member 200. When the base 100 moves toward the contact side 210, it drives the guide needle 700 and a portion of the transmitter 600 into the human body, and drives the unlocking portion 220 into contact with the transmitter bracket 300, thereby releasing the locking portion 310 from the guide needle bracket 400. When the locking portion 310 is unlocked, the elastic member 500 is used to drive the guide needle bracket 400 away from the transmitter bracket 300, thereby withdrawing the guide needle 700 from the human body.

[0059] On the one hand, the transmitter 600 and guide needle 700 are pre-installed on the transmitter holder 300 and guide needle holder 400, respectively, eliminating the need for user assembly prior to use. This simplifies the applicator's structure and user operation, and reduces the number of parts, thereby reducing costs. On the other hand, during use, the user places the contact member 200 against the skin and presses against the base 100. As the base 100 moves toward the contact side 210, it drives the guide needle 700 and a portion of the transmitter 600 into the body, causing the unlocking member 220 to contact the transmitter holder 300, unlocking the guide needle holder 400. The elastic restoring force of the elastic member 500 then retracts the guide needle 700. This entire operation eliminates the need for the user to determine whether the guide needle 700 is properly inserted or to perform the additional operation of retracting the guide needle 700. This reduces user error and subjective judgment, thereby making the guide needle 700 retraction process more reliable. Specifically, in the embodiment shown in FIGS. 1-15 , the locking portion 310 is provided on the transmitter bracket 300 , and in the embodiment shown in FIG. 16 , the locking portion 310 is provided on the base 100 .

[0060] It should be noted that the transmitter 600 may include or not include an electronic control unit. The guide needle bracket 400 and the guide needle 700 may be directly connected, indirectly connected, or integrally formed by injection molding.

[0061] Referring to Figures 1 and 2 , in actual use, the user will first need to unscrew cover 800 and remove it from base 100 to expose contact member 200 and guide needle 700. It should be noted that the tip of guide needle 700 is a certain distance from the edge of third opening 260. This distance ensures that when the user places contact member 200 against the body, guide needle 700 does not immediately pierce the skin. Specifically, the user can rotate base 100 in the direction indicated by arrow a in Figure 1 and rotate cover 800 in the direction indicated by arrow b in Figure 1 to unscrew cover 800.

[0062] Next, referring to Figures 4-6, the user holds the base 100 after removing the cover 800, places the contact member 200 extending from the base 100 in contact with the position on the human body where the sensor is to be worn, and then presses the base 100 toward the human body. Specifically, the user can press the base 100 in the direction indicated by arrow c in Figures 4-6. At this time, the contact member 200 remains stationary relative to the human body, and the base 100 and other components within the base 100 as a whole approach the human skin. After approaching a certain distance, the guide needle 700 begins to penetrate the skin. After continuing to approach a certain distance, the electrode wrapped by the guide needle 700 begins to enter the skin along the punctured wound. When the guide needle 700 penetrates the human body to a sufficient depth, the unlocking portion 220 squeezes the bent portion 313 of the elastic arm 311, causing the elastic arm 311 to retract toward the center of the transmitter bracket 300. This releases the locking catch 312 on the elastic arm 311 from the guide needle bracket 400. This in turn causes the elastic member 500 to push the guide needle bracket 400 away from the human body, and the guide needle bracket 400 pulls the guide needle 700 out of the human body, thereby achieving needle retraction. Specifically, the unlocking portion 220 moves relative to the base 100 in the direction indicated by arrow d in FIG6 , and applies a force in the direction indicated by arrow e to the bent portion 313.

[0063] 1-6 , in one embodiment, the locking portion 310 is engaged with the guide needle bracket 400 .

[0064] The locking portion 310 locks the guide needle bracket 400 by snapping together. Specifically, the locking portion 310 and the guide needle bracket 400 can be snapped together by a buckle, a slot or other suitable snapping structures.

[0065] 1-6 , in one embodiment, the locking portion 310 includes an elastic arm 311 and a locking buckle 312. The locking buckle 312 is protruding from the elastic arm 311 and engages with the guide needle bracket 400. When the unlocking portion 220 contacts the elastic arm 311, the elastic arm 311 is elastically deformed, thereby releasing the locking buckle 312 from the guide needle bracket 400.

[0066] The guide needle bracket 400 is locked by the locking buckle 312 engaging the guide needle bracket 400, so that the guide needle bracket 400 will not be pushed away from the transmitter bracket 300 by the elastic member 500 when locked. When the lock needs to be released, the unlocking portion 220 squeezes the elastic arm 311, causing the elastic arm 311 to elastically deform, thereby driving the locking buckle 312 to release the engagement with the guide needle bracket 400. Of course, in other embodiments, the locking method of the locking portion 310 and the guide needle bracket 400 is not limited to a snap-on connection. For example, the locking portion 310 can also lock the guide needle bracket 400 by bonding, damping fit, magnetic fit, or other suitable methods.

[0067] Please refer to Figures 6, 9 and 10. In one embodiment, the end of the elastic arm 311 has a bending portion 313 bent toward the inner wall of the base 100. The bending portion 313 is used to contact the unlocking portion 220 to release the locking buckle 312 from the guide needle bracket 400.

[0068] On the one hand, the bending allows the end of the elastic arm 311 to extend into the movement path of the unlocking portion 220, allowing the unlocking portion 220 to contact the bent portion 313 of the elastic arm 311 during relative movement between the base 100 and the contact member 200. On the other hand, the inclined surface where the bent portion 313 contacts the unlocking portion 220 acts as a guide, guiding the unlocking portion 220 to gradually press the end of the elastic arm 311 toward the center of the transmitter bracket 300.

[0069] Referring to Figures 4-6, 9, and 10, in one embodiment, the transmitter bracket 300 further includes a transmitter mounting portion 320, the transmitter 600 being connected to the transmitter mounting portion 320, and the guide needle bracket 400 being disposed on the side of the transmitter mounting portion 320 facing the base 100. One end of the elastic arm 311 is connected to the side of the transmitter mounting portion 320 facing the base 100, and the other end passes through the guide needle bracket 400. A locking buckle 312 is located on the side wall of the elastic arm 311 facing the guide needle bracket 400 and is engaged with the top of the guide needle bracket 400. A bent portion 313 is located on the end of the elastic arm 311 facing away from the guide needle bracket 400.

[0070] On the one hand, the transmitter mounting portion 320 supports the transmitter 600. On the other hand, because the bent portion 313 is located at the end of the elastic arm 311 away from the guide needle bracket 400, when the user pushes the base 100 toward the body, the unlocking portion 220 will not squeeze the elastic arm 311 before contacting the bent portion 313, allowing the guide needle 700 to be inserted into the body to a sufficient depth before triggering the needle retraction action.

[0071] 4-6, 9 and 13, in one embodiment, a plurality of locking portions 310 are arranged around the center line of the transmitter mounting portion 320, a plurality of unlocking portions 220 are provided on the contact member 200, and the plurality of unlocking portions 220 are arranged in one-to-one correspondence with the plurality of mounting portions.

[0072] On the one hand, providing multiple locking portions 310 facilitates more stable locking of the guide needle holder 400 from multiple positions, thereby improving the safety of the applicator. On the other hand, since multiple unlocking portions 220 are provided corresponding to the locking portions 310, when the user pushes the base 100 toward the body, the multiple unlocking portions 220 can correspondingly contact the multiple locking portions 310, thereby achieving simultaneous unlocking of the multiple locking portions 310, thereby ensuring the convenience of the unlocking process.

[0073] Please refer to Figures 4-6, 9 and 10. In one embodiment, when the unlocking portion 220 contacts the bending portion 313, it drives the elastic arm 311 to move away from one end of the transmitter mounting portion 320 and retract toward the center of the transmitter mounting portion 320 to cushion the movement of the guide needle bracket 400 away from the mounting portion.

[0074] When the needle is retracted, the guide needle holder 400 and the guide needle 700 are pushed away from the transmitter holder 300 by the elastic member 500. During this process, the elastic potential energy of the elastic member 500 is converted into the kinetic energy of the guide needle holder 400 and the guide needle 700. If the guide needle holder 400 directly hits the base 100 at this time, it will cause a sharp impact and loud noise. In this embodiment, when the unlocking portion 220 squeezes the end of the elastic arm 311, causing the end of the elastic arm 311 to contract toward the center of the transmitter mounting portion 320, the end of the elastic arm 311 extends to the movement path of the guide needle holder 400 away from the transmitter mounting portion 320. This causes the guide needle holder 400 to first contact the elastic arm 311, which acts as a buffer, thereby reducing the impact and noise, and improving the user experience.

[0075] Referring to Figures 3 and 7 , in one embodiment, a base body 100 has a receiving cavity 110. The side of the receiving cavity 110 facing the human body has a first opening 120, and a contact member 200 is movably disposed within the receiving cavity 110. When the base body 100 moves toward or away from the contact side 210, the contact member 200 retracts from the first opening 120 into or out of the receiving cavity 110. When the base body 100 moves toward the contact side 210, it first drives the guide needle 700 and a portion of the transmitter 600 into the human body, and then releases the lock 310 from the guide needle bracket 400.

[0076] A portion of the contact member 200 is accommodated by the accommodating cavity 110 of the base 100. When the user brings the contact member 200 into contact with the human body, a portion of the contact member 200 extends out of the accommodating cavity 110 from the first opening 120. When the user pushes the base 100 toward the human body, the portion of the contact member 200 extending out of the accommodating cavity 110 gradually shrinks from the first opening 120 into the accommodating cavity 110.

[0077] 3, 7, and 13, in one embodiment, a first limiting groove 130 is defined on the inner wall of the accommodating cavity 110. The limiting groove extends perpendicularly to the first opening 120. The contact 200 includes a contact body 230 and a limiting portion 2010. The limiting portion 2010 is connected to the contact body 230 and movably disposed in the limiting groove to guide the contact body 230 to move along the extending direction of the limiting groove.

[0078] On the one hand, when the user pushes the base 100 toward the body, the first limiting groove 130 cooperates with the limiting portion 2010 to guide the contact body 230 in the direction of extension of the first limiting groove 130, allowing the contact member 200 to retract more smoothly into the accommodating cavity 110. On the other hand, the cooperation between the first limiting groove 130 and the limiting portion 2010 also prevents relative rotation between the contact member 200 and the base 100. Specifically, in this embodiment, the first limiting groove 130 is formed by two adjacent ridges 140. In other embodiments, the first limiting groove 130 may also be formed by a depression in the inner wall of the accommodating cavity 110.

[0079] Please refer to Figures 7 and 13. In one embodiment, a resistance rib 170 is provided on the inner wall of the accommodating chamber 110. The contact member 200 includes a contact body 230 and a resistance arm 240. The contact body 230 is movably connected to the inner wall of the accommodating chamber 110. One end of the resistance arm 240 is connected to the contact body 230, and the other end is provided with a resistance arm buckle 241. The resistance arm buckle 241 is used to cooperate with the resistance rib 170.

[0080] The cooperation between the resistance arm buckle 241 and the resistance rib 170 enhances the resistance when the user pushes the base 100 , thereby improving the feedback sense when the user pushes the base 100 and reducing the possibility of the guide needle 700 being triggered by mistake.

[0081] 3-5 and 9 , in one embodiment, a first positioning arm 150 is provided on the inner wall of the accommodating cavity 110, and a positioning slot 151 is provided on the first positioning arm 150. The transmitter bracket 300 includes a transmitter mounting portion 320 and a second positioning arm 330. One end of the second positioning arm 330 is connected to the transmitter mounting portion 320, and the other end is provided with a positioning arm buckle 331, which engages with the positioning slot 151.

[0082] The positioning arm buckle 331 is engaged with the positioning slot 151 to achieve the connection between the transmitter bracket 300 and the base 100, so that when a user pushes the base 100, the transmitter bracket 300 can be driven to move. Of course, in other embodiments, the connection between the transmitter bracket 300 and the base 100 is not limited to the engagement. For example, the transmitter bracket 300 can also be connected by bonding, screw connection, or other suitable connection methods.

[0083] Referring to FIGS. 1 , 3 and 8 , in one embodiment, the applicator further includes a cover 800 , which is detachably connected to the base 100 to close the first opening 120 .

[0084] When the applicator is not in use, closing the first opening 120 by the cover body 800 can protect the contact member 200 and the guide needle 700, and is also beneficial to prevent the guide needle 700 from being triggered by mistake. Specifically, in this embodiment, the inner wall of the cover body 800 is threadedly connected to the outer wall of the base 100. In other embodiments, the cover body 800 and the base 100 can also be snap-fitted, bonded, or interference-fitted, etc. Specifically, the applicator has a base limiting rib 160 on the side facing the cover body 800, and a cover limiting surface 810 is provided inside the cover body 800. The cover limiting surface 810 is used to interfere with the base limiting rib 160 to limit the assembly depth of the cover body 800 and the base 100.

[0085] Please refer to Figures 3, 9 and 10. In one embodiment, the transmitter bracket 300 includes a transmitter mounting portion 320, and the transmitter mounting portion 320 has a mounting groove 630 on the side facing the first opening 120. The transmitter 600 is installed in the sensor mounting groove 630, the guide needle 700 passes through the middle of the transmitter 600, and the analyte sensor 620 of the transmitter 600 is disposed in the guide needle 700.

[0086] On the one hand, the mounting groove 630 enables the transmitter 600 to be mounted on the transmitter bracket 300, so that the movement of the transmitter bracket 300 can drive the transmitter 600 to move. On the other hand, because the analyte sensor 620 of the transmitter 600 is enclosed within the guide needle 700, when the guide needle 700 is inserted into the human body, the analyte sensor 620 can be driven into the human body.

[0087] Please refer to Figures 3, 9 and 10. In one embodiment, a mounting arm 322 is provided on the side wall of the mounting slot 630, and a mounting buckle 323 is provided on the side of the mounting arm 322 facing the transmitter 600. A snap-fitting slot 630 corresponding to the mounting buckle 323 is provided on the transmitter 600, and the mounting buckle 323 is snap-fitted to the snap-fitting slot 630.

[0088] The transmitter 600 is fixed in the mounting groove 630 by the cooperation between the mounting buckle 323 and the snap-fit ​​groove 630. Specifically, a plurality of mounting buckles 323 and snap-fit ​​grooves 630 can be provided in a one-to-one correspondence around the circumference of the analytical sensor to more stably fix the transmitter 600. In other embodiments, the transmitter 600 can also be fixed in the mounting groove 630 by bonding or other suitable connection methods.

[0089] 3 , 9 and 10 , in one embodiment, a slot 324 is provided on the edge of the emitter mounting portion 320 . The slot 324 is used to position and cooperate with the inner wall of the contact member 200 to limit the movement direction of the emitter mounting portion 320 within the contact member 200 .

[0090] 3 and 15 , in one embodiment, a medical adhesive patch 610 is provided on the side of the transmitter 600 facing the human body, and the medical adhesive patch 610 allows the transmitter 600 to fit tightly against the human skin.

[0091] 4-6, 11, and 12, in one embodiment, a guide needle holder 400 is disposed on a side of the transmitter mounting portion 320 facing away from the first opening 120. The guide needle holder 400 has a receiving cavity 410, and a second opening 420 is formed on the side of the receiving cavity 410 facing the transmitter mounting portion 320. An elastic member 500 is disposed within the receiving cavity 410, with one end of the elastic member 500 abutting against the inner wall of the guide needle holder 400 and the other end abutting against the transmitter mounting portion 320.

[0092] The accommodating cavity 410 of the guide needle holder 400 accommodates the compressed elastic member 500 and a portion of the guide needle 700. This allows the elastic member 500 within the accommodating cavity 410 to recover its shape under its own elastic restoring force when the locking portion 310 releases the guide needle holder 400, pushing the guide needle holder 400 away from the transmitter mounting portion 320. Specifically, in this embodiment, the elastic member 500 is configured as a spring. In other embodiments, the elastic member 500 may also be a spring or other suitable elastic structure.

[0093] 4-6, 11 and 12, in one embodiment, a plurality of first clearance holes 440 are provided on a side of the guide needle bracket 400 away from the second opening 420. The locking portion 310 includes an elastic arm 311, and the first clearance holes 440 are used for the elastic arm 311 to pass through.

[0094] Because the first clearance hole 440 is provided on the guide needle holder 400, the elastic arm 311 of the transmitter holder 300 can pass through the first clearance hole 440 and out of the accommodating cavity 410, thereby preventing the accommodating cavity 410 from interfering with the contact between the elastic arm 311 and the unlocking portion 220. Specifically, a plurality of first clearance holes 440 and elastic arms 311 can be provided along the circumference of the guide needle holder 400 in a one-to-one correspondence.

[0095] 4-6, 11, and 12, in one embodiment, a second limiting groove 450 is provided on the inner sidewall of the guide needle bracket 400, and the second limiting groove 450 extends perpendicularly to the second opening 420. The base 100 includes a first positioning arm 150, and the locking portion 310 includes an elastic arm 311. The second limiting groove 450 is configured to cooperate with the elastic arm 311 to guide the guide needle bracket 400 to move in a direction perpendicular to the second opening 420.

[0096] When the elastic member 500 drives the guide needle bracket 400 to move away from the transmitter mounting portion 320, the second limiting groove 450 cooperates with the elastic arm 311 to guide the guide needle bracket 400 to move along the extension direction of the second limiting groove 450, thereby helping to improve the stability of the movement direction of the guide needle bracket 400.

[0097] Please refer to Figures 4-6, 11 and 12. In one embodiment, a connecting arm 430 is provided in the middle of the guide needle bracket 400, and a connecting buckle 431 is provided on the connecting arm 430. The tail end of the guide needle 700 has a connecting groove 710, and the connecting groove 710 is engaged with the connecting buckle 431. The transmitter mounting part 320 has a connecting through hole 325 arranged opposite to the connecting arm 430, and the guide needle 700 passes through the transmitter mounting part 320 from the connecting through hole 325.

[0098] On the one hand, the snap-fit ​​engagement between the connecting buckle 431 and the connecting slot 710 secures the guide needle 700 to the guide needle holder 400. On the other hand, the guide needle 700 passes through the transmitter mounting portion 320 via the connecting hole 325, ensuring that the transmitter mounting portion 320 does not obstruct the insertion of the guide needle 700 into the human body. Specifically, the end of the guide needle 700 intended for insertion into the human body is the pointed end, and the end opposite the pointed end is the tail end. In other embodiments, the connection between the guide needle 700 and the guide needle holder 400 may also be achieved through bonding, interference fit, or other suitable connection methods.

[0099] Referring to Figures 4-6, 13, and 14, in one embodiment, contact member 200 has an inner cavity 250, with a third opening 260 on the side facing the human body. Transmitter mounting portion 320 and guide needle holder 400 are located within inner cavity 250. A through-hole 270 is defined on the side of contact member 200 facing away from third opening 260. Guide needle holder 400 is located within through-hole 270, allowing guide needle holder 400 to move away from transmitter mounting portion 320.

[0100] The inner cavity 250 of the contact member 200 accommodates the transmitter mounting portion 320 and the guide needle holder 400. On the one hand, because the inner cavity 250 of the contact member 200 has a third opening 260, the base 100 can drive the guide needle 700 to penetrate the human skin through the third opening 260. On the other hand, because the contact member 200 has a through hole 270, when the locking portion 310 releases the lock on the guide needle holder 400, the guide needle holder 400 can move out of the inner cavity 250 of the contact member 200 through the through hole 270, so that the contact member 200 does not hinder the retraction of the guide needle holder 400.

[0101] 4-6, 13 and 14, in one embodiment, a plurality of second clearance holes 280 are provided on a side of the contact member 200 away from the third opening 260, the base 100 includes a first positioning arm 150, and the second clearance holes 280 are used for the first positioning arm 150 to pass through.

[0102] Because the second clearance hole 280 is provided on the contact member 200, the first positioning arm 150 of the base body 100 can extend through the second clearance hole 280 into the inner cavity 250 of the contact member 200, thereby enabling the second positioning arm 330 on the emitter bracket 300 in the inner cavity 250 to engage with the first positioning arm 150. Specifically, multiple second clearance holes 280 and first positioning arms 150 can be provided along the circumference of the contact member 200 in a one-to-one correspondence.

[0103] 4-6 , 13 and 14 , in one embodiment, the inner wall of the contact member 200 further has a limiting structure 290 , and the limiting structure 290 is used to cooperate with the transmitter bracket 300 and / or the guide needle bracket 400 .

[0104] The movement of the transmitter bracket 300 and / or the guide needle bracket 400 in the inner cavity 250 is limited by the limiting structure 290. Specifically, referring to FIG14 , the limiting structure 290 may include a columnar limiting rib 291 and a limiting rib 292 having an inclined surface. In other embodiments, the limiting structure 290 may also be configured in an arc, a triangle, or other suitable shape according to actual needs.

[0105] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art can make several simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. An applicator for inserting an in-vivo analyte sensor, characterized in that, it comprises: a substrate; a contact member, the contact member is movably connected to the substrate, and the side of the contact member facing the human body is the contact side; a transmitter bracket, the transmitter bracket is connected to the substrate; a locking portion, the locking portion is provided on the transmitter bracket or the substrate; a guide needle bracket, the guide needle bracket is provided on the transmitter bracket, and the locking portion contacts the guide needle bracket to lock the guide needle bracket on the transmitter bracket; an elastic member; a transmitter, the transmitter is connected to the transmitter bracket; a guide needle, the guide needle is connected to the guide needle bracket; wherein, the contact member has an unlocking portion, the substrate can move close to the contact side, driving the unlocking portion to contact the transmitter bracket to release the locking of the locking portion on the guide needle bracket; the elastic member is used to drive the guide needle bracket to move away from the transmitter bracket in the state where the locking portion is unlocked, so as to drive the guide needle to withdraw from the human body.

2. The applicator according to claim 1, characterized in that, the locking portion is snap-connected to the guide needle bracket.

3. The applicator according to claim 2, characterized in that, the locking portion includes an elastic arm and a locking buckle, the locking buckle protrudes from the elastic arm, and the locking buckle is snap-connected to the guide needle bracket; when the unlocking portion contacts the elastic arm, it drives the elastic arm to elastically deform, so that the locking buckle is disengaged from the snap connection with the guide needle bracket.

4. The applicator according to claim 3, characterized in that, the end of the elastic arm has a bent portion bent towards the inner wall of the substrate, and the bent portion is used to contact the unlocking portion so that the locking buckle is disengaged from the snap connection with the guide needle bracket.

5. The applicator according to claim 4, characterized in that, the transmitter bracket further includes a transmitter mounting portion, the transmitter is connected to the transmitter mounting portion, and the guide needle bracket is provided on the side of the transmitter mounting portion facing the substrate; one end of the elastic arm is connected to the side of the transmitter mounting portion facing the substrate, and the other end passes through the guide needle bracket; the locking buckle is located on the side wall of the elastic arm facing the guide needle bracket, and the locking buckle is snap-connected to the top of the guide needle bracket; the bent portion is located at one end of the elastic arm away from the guide needle bracket.

6. The applicator according to claim 5, characterized in that, a plurality of the locking portions are arranged around the center of the transmitter mounting portion, and a plurality of the unlocking portions are provided on the contact member, and the plurality of unlocking portions are arranged in one-to-one correspondence with the plurality of mounting portions.

7. The applicator according to claim 5, characterized in that, when the unlocking portion contacts the bent portion, it drives the end of the elastic arm away from the transmitter mounting portion to contract towards the center of the transmitter mounting portion, so as to buffer the movement of the guide needle bracket away from the transmitter mounting portion.

8. The applicator according to any one of claims 1-7, characterized in that, The base has a accommodating cavity, and the accommodating cavity has a first opening on a side facing the human body, and the contact piece is movably arranged in the accommodating cavity; when the base moves close to or away from the contact side, the contact piece is retracted into or extended from the accommodating cavity from the first opening; and when the base moves close to the contact side, it first drives the guide needle and a part of the transmitter to be inserted into the human body, and then releases the locking part from the guide needle bracket.

9. The applicator of claim 8, It is characterized in that The inner wall of the accommodating cavity is provided with a first limiting groove, which extends in a direction perpendicular to the first opening; the contact piece includes a contact body and a limiting portion, the limiting portion is connected to the contact body, and the limiting portion is movably arranged in the limiting groove to guide the contact body to move along the extension direction of the limiting groove.

10. The applicator of claim 8, It is characterized in that The inner wall of the accommodating cavity is provided with a resistance rib, and the contact piece includes a contact body and a resistance arm. The contact body is movably connected to the inner wall of the accommodating cavity, one end of the resistance arm is connected to the contact body, and the other end is provided with a resistance arm buckle, and the resistance arm buckle is used to cooperate with the resistance rib.

11. The applicator of claim 8, It is characterized in that A first positioning arm is provided on the inner wall of the accommodating cavity, and a positioning groove is provided on the first positioning arm; the transmitter bracket includes a transmitter mounting part and a second positioning arm, one end of the second positioning arm is connected to the transmitter mounting part, and the other end is provided with a positioning arm buckle, and the positioning arm buckle is clamped with the positioning groove.

12. The applicator of claim 8, It is characterized in that A cover body is also included, which is detachably connected to the base body and is used to close the first opening.

13. The applicator of claim 8, It is characterized in that The transmitter bracket includes a transmitter mounting portion, and the transmitter mounting portion has a mounting groove on one side facing the first opening. The transmitter is installed in the sensor mounting groove, the guide needle passes through the middle of the transmitter, and the analyte sensor of the transmitter is arranged in the guide needle.

14. The applicator of claim 13, It is characterized in that The guide needle bracket is arranged on the side of the transmitter mounting portion away from the first opening, the guide needle bracket has a accommodating cavity, and the accommodating cavity has a second opening on the side facing the transmitter mounting portion; the elastic member is arranged in the accommodating cavity, one end of the elastic member abuts against the inner wall of the guide needle bracket, and the other end abuts against the transmitter mounting portion.

15. The applicator of claim 14, It is characterized in that A connecting arm is provided in the middle of the guide needle bracket, and a connecting buckle is provided on the connecting arm. The tail end of the guide needle has a connecting groove, and the connecting groove is engaged with the connecting buckle; the transmitter mounting part has a connecting through hole arranged opposite to the connecting arm, and the guide needle passes through the transmitter mounting part from the connecting through hole.

16. The applicator of claim 14, It is characterized in that On one side of the guiding needle bracket away from the second opening, a plurality of first relief holes are provided. The locking portion includes an elastic arm, and the first relief holes are for the elastic arm to pass through.

17. The applicator according to claim 14, wherein, a second limiting groove is provided on the inner side wall of the guiding needle bracket, and the extending direction of the second limiting groove is perpendicular to the second opening; the locking portion includes an elastic arm, and the second limiting groove is used to cooperate with the elastic arm to guide the guiding needle bracket to move in a direction perpendicular to the second opening.

18. The applicator according to claim 13, wherein, a mounting arm is provided on the side wall of the mounting groove, a mounting buckle is provided on the side of the mounting arm facing the emitter, and a clamping groove corresponding to the mounting buckle is provided on the emitter, and the mounting buckle is clamped with the clamping groove.

19. The applicator according to claim 13, wherein, the contact member has an inner cavity, and the inner cavity has a third opening on the side facing the human body; the emitter mounting portion and the guiding needle bracket are located in the inner cavity; a through hole is provided on the side of the contact member away from the third opening, and the guiding needle bracket is located in the through hole, and the through hole is for the guiding needle bracket to move away from the emitter mounting portion.

20. The applicator according to claim 19, wherein, a plurality of second relief holes are provided on the side of the contact member away from the third opening, the base body includes a first positioning arm, and the second relief holes are for the first positioning arm to pass through.

21. The applicator according to claim 19, wherein, the inner wall of the contact member further has a limiting structure, and the limiting structure is used to cooperate with the emitter bracket and / or the guiding needle bracket.

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