Applicator for insertion into in vivo analyte sensor

Abstract

The utility model discloses an applicator for inserting an analyte sensor in a body. The applicator comprises a base body, a contact piece, an emitter support, a locking part, a guide needle support, an elastic piece, an emitter and a guide needle. The contact piece is movably connected with the base body, the emitter support is connected with the base body, the locking part is arranged on the emitter support or the base body, and the locking part makes contact with the guiding needle support and is used for locking the guiding needle support on the emitter support. The contact piece is provided with an unlocking part, and the base body is configured to selectively move close to or away from the contact side of the contact piece. A user does not need to assemble the applicator before use, so that the structure of the applicator and the operation process of the user are simplified. And a user can unlock the guide needle bracket by tightly attaching the contact piece to the skin of a human body and pressing the base body in the use process, so that the guide needle is driven to be recovered through the elastic piece. The user does not need to additionally recover the guide needle, so that the recovery process of the guide needle is more reliable.

Description

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] Diabetes may cause many complications such as coma, poisoning, neuropathy, cardiovascular and cerebrovascular diseases, etc. Therefore, diabetic patients need to know whether their glucose levels are within the safe range. However, the traditional measurement method is cumbersome to use, has deep wounds, obvious pain, and can only measure a single value. As a result, diabetic patients cannot understand their own glucose levels in real time. In order to enable diabetic patients to understand their glucose levels in real time, some patients choose to wear analyte sensors. When wearing analyte sensors, an injection device (applicator) is required. The analyte sensor is inserted into the human body through the sharp object (introducer needle) of the injection device so that the analyte sensor contacts the body fluid.

[0003] However, most existing injection devices are divided into two components: a needle aid and a transmitter. The user assembles the needle aid and the transmitter when using the device. This assembly process increases the difficulty of use for the user. When the user lacks training, the pre-installation process is complicated, and the user's practical hands-on ability is insufficient, it is easy to cause the analyte sensor to fail to be inserted. In addition, due to lack of experience, it is difficult for the user to determine whether the sharp object of the injection device has been inserted in place, which can easily lead to the sharp object being retracted prematurely before the sensor can be properly implanted in the human body. Therefore, there is an urgent need for an applicator with a simpler structure and operation process and a more reliable retraction of the sharp object. Utility Model Content

[0004] The main purpose of the utility model is to provide an applicator with a simpler structure and operation process and more reliable recovery of sharp objects.

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

[0006] matrix;

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

[0008] A transmitter bracket, the transmitter bracket is connected to the base;

[0009] A locking portion, the locking portion being arranged on the transmitter bracket or the base;

[0010] An introducer needle bracket, the introducer needle bracket is arranged on the transmitter bracket, and the locking portion contacts the introducer needle bracket to lock the introducer needle bracket on the transmitter bracket;

[0011] Elastic parts;

[0012] a transmitter, the transmitter being connected to the transmitter bracket;

[0013] An introducer needle, the introducer needle being connected to the introducer 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 transmitter 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 transmitter 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 protruding 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 also 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 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 end of the elastic arm away from the transmitter mounting portion to shrink 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, and the first limiting groove 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 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.

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

[0026] In one embodiment, the transmitter bracket includes a transmitter mounting portion, the transmitter mounting portion has a mounting groove on a side facing the first opening, the transmitter is installed in the 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.

[0027] In one embodiment, 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.

[0028] In one embodiment, a connecting arm is provided in the middle portion of the guide needle bracket, a connecting buckle is provided on the connecting arm, 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 portion has a connecting through hole arranged opposite to the connecting arm, and the guide needle passes through the transmitter mounting portion 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 comprises 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 a side wall of the mounting groove, a mounting buckle is provided on a side of the mounting arm facing the transmitter, a snap-fitting groove corresponding to the mounting buckle is provided on the transmitter, and the mounting buckle is snap-fitted with the snap-fitting groove.

[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.

[0035] According to the applicator for inserting an analyte sensor in vivo in the above-mentioned embodiment, the applicator includes a substrate, a contact member, a locking portion, a transmitter bracket, a guide needle bracket, an elastic member, a transmitter and a guide needle. The contact member is movably connected to the substrate, and the side of the contact member facing the human body is the contact side. The transmitter bracket is connected to the substrate, and the locking portion is arranged on the transmitter bracket or the substrate. The guide needle bracket is arranged on the transmitter bracket, and the locking portion contacts the guide needle bracket to lock the guide needle bracket on the transmitter bracket. The transmitter is connected to the transmitter bracket, and the guide needle is connected to the guide needle bracket. The contact member has an unlocking portion, and the substrate can move close to the contact side, driving the unlocking portion to contact the transmitter bracket to release the locking of the guide needle bracket by the locking portion. The elastic member is used to drive the guide needle bracket to move away from the transmitter bracket when the locking portion is unlocked, so as to drive the guide needle to be withdrawn from the human body. On the one hand, the transmitter and the guide needle are pre-installed on the transmitter bracket and the guide needle bracket respectively, and the user does not need to assemble them before use, which is conducive to simplifying the structure of the applicator and the user's operation process. On the other hand, during use, the user presses the contact piece against the human skin and presses the base. When the base moves close to the contact side, it drives the guide needle and a part of the transmitter to be inserted 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, and to perform additional operations to recover the guide needle, which reduces the user's subjective judgment and operation errors, thereby making the recovery process of the guide needle more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structure of the applicator in a closed state in one embodiment of the present application;

[0037] Figure 2 This is a schematic diagram of the structure of the applicator after the cover is removed in one embodiment of the present application;

[0038] Figure 3 A cross-sectional view of an applicator in a closed state in one embodiment of the present application;

[0039] Figure 4 This is a cross-sectional view of an applicator after removing the cover in one embodiment of the present application;

[0040] Figure 5 This is a cross-sectional view of the applicator when the guide needle contacts the skin in one embodiment of the present application;

[0041] Figure 6 This is a cross-sectional view of the applicator when the guide needle is inserted into the skin in one embodiment of the present application;

[0042] Figure 7 This is a schematic structural diagram of a substrate in one embodiment of the present application;

[0043] Figure 8 This is a schematic diagram of the structure of a cover body in one embodiment of the present application;

[0044] Fig. 9 This is a structural schematic diagram of a transmitter bracket from one perspective in one embodiment of the present application;

[0045] Fig.10 This is a structural schematic diagram of a transmitter bracket from another perspective in one embodiment of the present application;

[0046] Fig.11 This is a schematic diagram of the structure inside the guide needle bracket in one embodiment of the present application;

[0047] Fig.12 This is a schematic structural diagram of the back of the guide needle bracket in one embodiment of the present application;

[0048] Fig.13 This is a schematic diagram of the structure of the outside of a contact member in an embodiment of the present application;

[0049] Fig.14 This is a schematic diagram of the structure inside the contact element in one embodiment of the present application;

[0050] Fig.15 This is a schematic diagram of the structure of a transmitter and a guide needle in one embodiment of the present application;

[0051] Fig.16 This 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 part; 320, transmitter mounting part; 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 member; 600, transmitter; 610, medical adhesive patch; 620, analyte sensor; 630, snap-in slot; 700, guide needle; 710, connecting slot; 800, cover body; 810, limiting surface of cover body. DETAILED DESCRIPTION

[0053] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can 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 can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0055] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

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

[0057] Please refer to Figure 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, and the side of the contact member 200 facing the human body is the contact side 210. The transmitter bracket 300 is connected to the base 100, and the locking part 310 is arranged on the transmitter bracket 300 or the base 100. The guide needle bracket 400 is arranged on the transmitter bracket 300, and the locking part 310 contacts the guide needle bracket 400 to lock the guide needle bracket 400 on the transmitter bracket 300. The elastic member 500 is arranged between the analyte sensor 600 and the guide needle bracket 400. The transmitter 600 is connected to the transmitter bracket 300, and the guide needle 700 is connected to the guide needle bracket 400. The contact member 200 has an unlocking portion 220, and the base 100 is configured to selectively move close to or away from the contact side 210 of the contact member 200. When the base 100 moves close to the contact side 210, it is used to drive the guide needle 700 and a part of the transmitter 600 to be inserted into the human body, and drive the unlocking portion 220 to contact the transmitter bracket 300 to release the locking portion 310 from locking the guide needle bracket 400. The elastic member 500 is used to drive the guide needle bracket 400 to move away from the transmitter bracket 300 when the locking portion 310 is unlocked, so as to drive the guide needle 700 to be withdrawn from the human body.

[0059] On the one hand, the transmitter 600 and the guide needle 700 are pre-installed on the transmitter bracket 300 and the guide needle bracket 400 respectively, and the user does not need to assemble them before use, which is conducive to simplifying the structure of the applicator and the user's operation process, and the number of parts is less, which is conducive to reducing costs. On the other hand, during use, the user puts the contact member 200 close to the human skin and presses the base 100. When the base 100 moves close to the contact side 210, it drives the guide needle 700 and a part of the transmitter 600 to be inserted into the human body, and drives the unlocking part 220 to contact the transmitter bracket 300 to unlock the guide needle bracket 400, thereby driving the guide needle 700 to be recovered through the elastic restoring force of the elastic member 500. The entire operation process does not require the user to judge whether the guide needle 700 is inserted in place, and to perform additional operations to recover the guide needle 700, which reduces the errors of the user's subjective judgment and operation, thereby making the recovery process of the guide needle 700 more reliable. Specifically, in Figure 1-15 In the embodiment shown, the locking portion 310 is disposed on the transmitter bracket 300. Fig.16 In the illustrated embodiment, the locking portion 310 is disposed on the base body 100 .

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

[0061] Please refer to Figure 1 and 2 In actual application scenarios, the user needs to first unscrew the cover 800 and remove the cover 800 from the base 100 to expose the contact piece 200 and the guide needle 700. It should be noted that at this time, the needle tip of the guide needle 700 is a certain distance away from the edge of the third opening 260. This distance ensures that the guide needle 700 will not immediately pierce the skin when the user puts the contact piece 200 against the human body. Specifically, the user can move along Figure 1 The base 100 is rotated in the direction indicated by the arrow a, and Figure 1 The cover body 800 is rotated in the direction indicated by the arrow b, thereby unscrewing the cover body 800.

[0062] Next, please refer to Figure 4-6 The user holds the base 100 after removing the cover 800, puts the contact piece 200 extending from the base 100 in contact with the position where the sensor needs to be worn on the human body, and then presses the base 100 toward the human body. Figure 4-6The base 100 is pressed in the direction indicated by the middle arrow c. At this time, the contact piece 200 remains stationary relative to the human body, and the base 100 and other components in 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 bending portion 313 of the elastic arm 311, causing the elastic arm 311 to contract toward the center of the transmitter bracket 300, thereby unlocking the locking buckle 312 on the elastic arm 311 and the guide needle bracket 400, and then causing the elastic member 500 to push the guide needle bracket 400 away from the human body, and the guide needle bracket 400 drives the guide needle 700 to be pulled out of the human body, thereby realizing the needle retracting action. Specifically, the unlocking portion 220 is relative to the base 100 along Figure 6 The movable member 310 moves in the direction indicated by the arrow d, and applies a force in the direction indicated by the arrow e to the bending portion 313.

[0063] Please refer to Figure 1-6 In one embodiment, the locking portion 310 is snap-fitted to 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] Please refer to Figure 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 the locking buckle 312 is engaged with the guide needle bracket 400. When the unlocking portion 220 contacts the elastic arm 311, the elastic arm 311 is elastically deformed, so that the locking buckle 312 is released from the guide needle bracket 400.

[0066] The guide needle bracket 400 is locked by the locking buckle 312 and 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 in the locked state. When it is necessary to release the lock, the elastic arm 311 is squeezed by the unlocking part 220, so that the elastic arm 311 is elastically deformed, thereby driving the locking buckle 312 to release the locking connection with the guide needle bracket 400. Of course, in other embodiments, the locking method of the locking part 310 and the guide needle bracket 400 is not limited to the locking method. For example, the locking part 310 can also lock the guide needle bracket 400 by bonding, damping matching, magnetic attraction matching or other suitable methods.

[0067] Please refer to Figure 6 , 9And 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, and 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 end of the elastic arm 311 is extended to the movement path of the unlocking portion 220 by bending, so that the unlocking portion 220 can contact the bent portion 313 of the elastic arm 311 when the base 100 and the contact member 200 move relative to each other. On the other hand, the inclined surface where the bent portion 313 contacts the unlocking portion 220 plays a guiding role, which can guide the unlocking portion 220 to gradually press the end of the elastic arm 311 toward the center of the transmitter bracket 300.

[0069] Please refer to Figure 4-6 , 9 and 10, in one embodiment, the transmitter bracket 300 further includes a transmitter mounting portion 320, the transmitter 600 is connected to the transmitter mounting portion 320, and the guide needle bracket 400 is arranged 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. The locking buckle 312 is located on the side wall of the elastic arm 311 facing the guide needle bracket 400, and the locking buckle 312 is clamped with the top of the guide needle bracket 400, and the bending portion 313 is located at the end of the elastic arm 311 away from the guide needle bracket 400.

[0070] On the one hand, the transmitter 600 is supported by the transmitter mounting portion 320. On the other hand, since the bending 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 human body, the unlocking portion 220 will not squeeze the elastic arm 311 before contacting the bending portion 313, so that the guide needle 700 can be inserted into the human body to a sufficient depth before the needle retraction action is triggered.

[0071] Please refer to Figure 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 one-to-one correspondingly to the plurality of mounting portions.

[0072] On the one hand, the provision of multiple locking parts 310 is conducive to more stably locking the guide needle bracket 400 from multiple positions, thereby facilitating the improvement of the safety of the applicator. On the other hand, since multiple unlocking parts 220 corresponding to the locking parts 310 are provided, when the user pushes the base 100 toward the human body, the multiple unlocking parts 220 can contact the multiple locking parts 310 correspondingly, thereby achieving simultaneous unlocking of the multiple locking parts 310, thereby facilitating the convenience of the unlocking step.

[0073] Please refer to Figure 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 shrink away from one end of the transmitter mounting portion 320 toward the center of the transmitter mounting portion 320, so as to buffer the movement of the guide needle bracket 400 away from the mounting portion.

[0074] When the needle retracting action is realized, the guide needle bracket 400 and the guide needle 700 are pushed away from the transmitter bracket 300 by the elastic member 500. In this process, the elastic potential energy of the elastic member 500 is converted into the kinetic energy of the guide needle bracket 400 and the guide needle 700. If the guide needle bracket 400 directly hits the base 100 at this time, it will cause a violent impact and a loud noise. In this embodiment, when the unlocking part 220 squeezes the end of the elastic arm 311 so that the end of the elastic arm 311 shrinks toward the center of the transmitter mounting part 320, the end of the elastic arm 311 extends to the movement path of the guide needle bracket 400 away from the transmitter mounting part 320. This makes the guide needle bracket 400 contact with the elastic arm 311 first, and the elastic arm 311 plays a buffering role, thereby reducing the impact and noise, and improving the user experience.

[0075] Please refer to Figure 3 and 7 In one embodiment, the base 100 has a receiving cavity 110, and the receiving cavity 110 has a first opening 120 on a side facing the human body, and the contact member 200 is movably disposed in the receiving cavity 110. When the base 100 moves toward or away from the contact side 210, the contact member 200 is retracted into or extended from the receiving cavity 110 from the first opening 120. When the base 100 moves toward the contact side 210, the guide needle 700 and a part of the transmitter 600 are first driven to be inserted into the human body, and then the locking part 310 is released from the locking of 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] Please refer to Figure 3 , 7 In one embodiment, the inner wall of the accommodating cavity 110 is provided with a first limiting groove 130, and the limiting groove extends in a direction perpendicular to the first opening 120. The contact member 200 includes a contact body 230 and a limiting portion 2010, the limiting portion 2010 is connected to the contact body 230, and the limiting portion 2010 is movably disposed in the limiting groove to guide the contact body 230 to move along the extension direction of the limiting groove.

[0078] On the one hand, when the user pushes the base 100 toward the human body, the first limiting groove 130 and the limiting portion 2010 cooperate to guide the contact body 230 to move along the extension direction of the first limiting groove 130, so that the contact member 200 can be more smoothly retracted into the accommodating cavity 110. On the other hand, the cooperation between the first limiting groove 130 and the limiting portion 2010 can also prevent the contact member 200 and the base 100 from rotating relative to each other. Specifically, in this embodiment, the first limiting groove 130 is formed by two adjacent convex strips 140. In other embodiments, the first limiting groove 130 can also be formed by a depression on the inner wall of the accommodating cavity 110.

[0079] Please refer to Figure 7 and 13 In one embodiment, a resistance rib 170 is provided on the inner wall of the accommodating cavity 110, and the contact piece 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 cavity 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] Please refer to Figure 3-5 9, in one embodiment, the inner wall of the accommodating cavity 110 is provided with a first positioning arm 150, and the first positioning arm 150 is provided with a positioning groove 151. 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, and the positioning arm buckle 331 is snap-fitted with the positioning groove 151.

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

[0083] Please refer to Figure 1 , 3 In one embodiment, the applicator further includes a cover 800 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 helpful in preventing the guide needle 700 from being triggered by mistake. Specifically, in the present 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 Figure 3 , 9 and 10, in one embodiment, the transmitter bracket 300 includes a transmitter mounting portion 320, the transmitter mounting portion 320 has a mounting groove 321 on the side facing the first opening 120, the transmitter 600 is installed in the mounting groove 321, the guide needle 700 passes through the middle of the transmitter 600, and the analyte sensor 620 of the transmitter 600 is arranged in the guide needle 700.

[0086] On the one hand, the transmitter 600 is installed on the transmitter bracket 300 through the installation groove 321, so that the transmitter bracket 300 can drive the transmitter 600 to move when it moves. On the other hand, since the analyte sensor 620 of the transmitter 600 is wrapped in 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 Figure 3 , 9 In one embodiment, a mounting arm 322 is provided on the side wall of the mounting groove 321, a mounting buckle 323 is provided on the side of the mounting arm 322 facing the transmitter 600, a snap-fitting groove 630 corresponding to the mounting buckle 323 is provided on the transmitter 600, and the mounting buckle 323 is snap-fitted with the snap-fitting groove 630.

[0088] The transmitter 600 is fixed in the installation slot 321 by the cooperation between the installation buckle 323 and the clamping slot 630. Specifically, a plurality of installation buckles 323 and clamping slots 630 may be provided one-to-one around the circumference of the analysis sensor to more stably fix the transmitter 600. In other embodiments, the transmitter 600 may also be fixed in the installation slot 321 by bonding or other suitable connection methods.

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

[0090] Please refer to Figure 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 can make the transmitter 600 fit closely to the human skin.

[0091] Please refer to Figure 4-6 , 11 and 12, in one embodiment, the guide needle bracket 400 is arranged on the side of the transmitter mounting portion 320 away from the first opening 120, the guide needle bracket 400 has a receiving cavity 410, and the side of the receiving cavity 410 facing the transmitter mounting portion 320 has a second opening 420. The elastic member 500 is arranged in the receiving cavity 410, one end of the elastic member 500 abuts against the inner wall of the guide needle bracket 400, and the other end abuts against the transmitter mounting portion 320.

[0092] The accommodating cavity 410 of the guide needle bracket 400 accommodates the elastic member 500 and a part of the guide needle 700 in a compressed state, so that when the locking portion 310 releases the locking of the guide needle bracket 400, the elastic member 500 in the accommodating cavity 410 will restore its deformation under the action of its own elastic restoring force and push the guide needle bracket 400 to move in a direction away from the transmitter mounting portion 320. Specifically, the elastic member 500 in this embodiment is configured as a spring, and in other embodiments, the elastic member 500 may also be a spring or other suitable elastic structure.

[0093] Please refer to Figure 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] Since the first clearance hole 440 is provided on the guide needle bracket 400, the elastic arm 311 of the transmitter bracket 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 in a one-to-one correspondence along the circumference of the guide needle bracket 400.

[0095] Please refer to Figure 4-6, 11 and 12, in one embodiment, a second limiting groove 450 is provided on the inner side wall of the guide needle bracket 400, and the extension direction of the second limiting groove 450 is perpendicular 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 used 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 facilitating improving the stability of the movement direction of the guide needle bracket 400.

[0097] Please refer to Figure 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 guide needle 700 is fixed on the guide needle bracket 400 by the snap fit between the connection buckle 431 and the connection groove 710. On the other hand, the guide needle 700 passes through the transmitter mounting portion 320 from the connection hole 325, so that the transmitter mounting portion 320 does not hinder the guide needle 700 from being inserted into the human body. Specifically, the end of the guide needle 700 used for inserting into the human body is the tip, and the end opposite to the tip is the tail. In other embodiments, the connection between the guide needle 700 and the guide needle bracket 400 can also be bonding, interference fit or other suitable connection methods.

[0099] Please refer to Figure 4-6 , 13 and 14, in one embodiment, the contact member 200 has an inner cavity 250, and the inner cavity 250 has a third opening 260 on the side facing the human body. The transmitter mounting portion 320 and the guide needle bracket 400 are located in the inner cavity 250. A through hole 270 is provided on the side of the contact member 200 away from the third opening 260, and the guide needle bracket 400 is located in the through hole 270, and the through hole 270 is used for the guide needle bracket 400 to move away from the transmitter mounting portion 320.

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

[0101] Please refer to Figure 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 body 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] Since the second clearance hole 280 is provided on the contact member 200, the first positioning arm 150 of the base body 100 can extend from the second clearance hole 280 into the inner cavity 250 of the contact member 200, so that the second positioning arm 330 on the emitter bracket 300 in the inner cavity 250 can be engaged with the first positioning arm 150. Specifically, a plurality of second clearance holes 280 and first positioning arms 150 can be provided in a one-to-one correspondence along the circumference of the contact member 200.

[0103] Please refer to Figure 4-6 , 13 and 14, in one embodiment, the inner wall of the contact member 200 also 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 support 300 and / or the guide needle support 400 in the inner cavity 250 is limited by the limiting structure 290. For details, please refer to Fig.14 The limiting structure 290 may include a columnar limiting rib 291 and a limiting rib 292 with an inclined surface. In other embodiments, the limiting structure 290 may also be configured to be an arc, a triangle or other suitable shapes according to actual needs.

[0105] The above specific 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. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. An applicator for inserting an analyte sensor in vivo, characterized in that include: matrix; A contact piece, wherein the contact piece is movably connected to the base body, and a side of the contact piece facing the human body is a contact side; a transmitter bracket, the transmitter bracket being connected to the base; a locking portion, the locking portion being arranged on the transmitter bracket or the base; An introducer needle bracket, the introducer needle bracket is arranged on the transmitter bracket, and the locking portion contacts the introducer needle bracket to lock the introducer needle bracket on the transmitter bracket; Elastic parts; a transmitter, the transmitter being connected to the transmitter bracket; An introducer needle, the introducer needle being connected to the introducer needle bracket; 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 transmitter 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 transmitter bracket when the locking part is unlocked, so as to drive the guide needle to be pulled out of the human body.

2. The applicator according to claim 1, characterized in that The locking portion is engaged with 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, wherein the locking buckle is protruding from the elastic arm and is engaged with the guide needle bracket; when the unlocking portion contacts the elastic arm, the elastic arm is driven to undergo elastic deformation, so that the locking buckle is released from the engagement 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 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.

5. The applicator according to claim 4, characterized in that The transmitter bracket also 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.

6. The applicator of claim 5, wherein: A plurality of locking portions are arranged around the center of the transmitter mounting portion, a plurality of unlocking portions are provided on the contact piece, and the plurality of unlocking portions are arranged in one-to-one correspondence with the plurality of mounting portions; when the unlocking portion contacts the bending portion, the end of the elastic arm away from the transmitter mounting portion is driven to contract 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.

7. The applicator according to any one of claims 1 to 6, characterized in that The base has a receiving cavity, and the receiving cavity has a first opening on a side facing the human body, and the contact piece is movably arranged in the receiving cavity; when the base moves close to or away from the contact side, the contact piece is retracted into or extended from the receiving cavity from the first opening; and when the base moves close to the contact side, the guide needle and a part of the transmitter are first driven to be inserted into the human body, and then the locking part of the guide needle bracket is released; the inner wall of the receiving cavity is provided with a first limiting groove, and the first limiting groove extends in a direction perpendicular to the first opening; the contact piece includes a contact body and a limiting part, the limiting part is connected to the contact body, and the limiting part is movably arranged in the limiting groove to guide the contact body to move along the extension direction of the limiting groove; the inner wall of the receiving 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 receiving 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.

8. The applicator of claim 7, wherein: 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.

9. The applicator of claim 7, wherein: A cover body is also included, which is detachably connected to the base body and is used to close the first opening.

10. The applicator of claim 7, wherein: The transmitter bracket includes a transmitter mounting portion, the transmitter mounting portion has a mounting groove on the side facing the first opening, the transmitter is mounted in the 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; 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.

11. The applicator of claim 10, 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 transmitter, a clamping groove corresponding to the mounting buckle is provided on the transmitter, and the mounting buckle is clamped with the clamping groove.

12. The applicator of claim 10, wherein: 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 part 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 part; a plurality of second clearance holes are provided on the side of the contact piece away from the third opening, the base includes a first positioning arm, and the second clearance hole is used for the first positioning arm to pass through; the inner wall of the contact piece also has a limiting structure, and the limiting structure is used to cooperate with the transmitter bracket and / or the guide needle bracket.

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