An injection device for analyte sensor implantation

Abstract

An injection device for analyte sensor implantation includes a guide needle, a guide needle holder and a monitor holder. The guide needle is used to assist the analyte sensor to enter a base. The guide needle holder is provided with a first clamping part. The monitor holder is provided with a second clamping part, and the guide needle holder and the monitor holder are movably sleeved. The guide needle holder and the monitor holder have a first position and a second position. In the first position, the first clamping part is located between the second clamping part and the needle tip of the guide needle, and the first clamping part and the second clamping part are spaced apart. In the second position, the first clamping part and the second clamping part are in contact. When using the injection device, the monitor holder can be moved alone towards the side close to the base first, and then the monitor holder and the guide needle holder can be moved synchronously after the second clamping part and the first clamping part are in contact. Through the sequence of movement of the monitor holder and the guide needle holder and the cooperation of the second clamping part and the first clamping part, the use process of the injection device is simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an injection device for analyte sensor implantation. BACKGROUND

[0002] With the improvement of people's material life, the number of diabetes patients is also growing. Diabetes can cause coma, poisoning, neuropathy, cardiovascular and cerebrovascular disease and many other complications, so diabetes patients need to know whether their glucose level is within a safe range, but the traditional measurement method is cumbersome to use, has a deep incision, obvious pain and can only measure a single value, etc., which makes it difficult for diabetes patients to know their glucose level in real time. In order to enable diabetes patients to know their glucose level in real time, some patients choose to wear analyte sensors, which require the use of an injection device to insert the analyte sensor into the human body through the guide needle of the injection device so that the analyte sensor can come into contact with the body fluid.

[0003] The existing injection device includes a guide needle support and a monitor support, the guide needle support is fixed with a guide needle, and the monitor support is fixed with a monitor. When using the injection device, the monitor support and the guide needle support move synchronously. When the monitor support and the guide needle support move synchronously, in order to avoid interference with the use of the monitor later, the guide needle support needs to be moved away from the human skin or retracted a distance before the monitor is fixed on the human skin after the monitor support and the guide needle support move synchronously. The separate movement of the guide needle support increases the complexity of using the injection device. SUMMARY

[0004] The present application provides an injection device for analyte sensor implantation, which mainly aims to simplify the use process of the injection device.

[0005] In an embodiment of the present application, an injection device for analyte sensor implantation is provided, which includes:

[0006] a guide needle for assisting the analyte sensor to enter the base body;

[0007] a guide needle support, the guide needle support is provided with a first clamping part, and the guide needle is fixed to the guide needle support; and

[0008] a monitor support, the monitor support is provided with a second clamping part, and the guide needle support and the monitor support are movably sleeved;

[0009] The guide needle support and the monitor support have a first position and a second position; in the first position, the first clamping part is located between the second clamping part and the guide needle tip, and the first clamping part and the second clamping part are spaced apart; in the second position, the first clamping part and the second clamping part are in contact.

[0010] In an embodiment, the guide sleeve and the sensor cap are further included, the guide needle is fixed to the guide sleeve, and the guide sleeve is fixed to the guide needle support; in the first position, part of the guide sleeve, part of the guide needle, and the sensor cap are located at one end of the monitor support close to the guide needle tip, and the sensor cap and the guide sleeve are sleeved, and the axial length of the guide sleeve away from the end of the guide needle tip of the monitor support is L1; in the second position, the axial length of the guide sleeve away from the end of the guide needle tip of the monitor support is L2, and L1 < L2.

[0011] In an embodiment, the first elastic member and the sheath are further included; one end of the first elastic member abuts against the guide needle support, and the other end of the first elastic member abuts against the monitor support, and the first elastic member is in a compressed state; the sheath and the monitor support are movably sleeved, the guide needle support is sleeved on the inner side of the monitor support, and the sheath is sleeved on the outer side of the monitor support; the first stop part is arranged on the guide needle support, the first elastic member is located between the first stop part and the guide needle tip, in the first position, the first stop part abuts against the sheath.

[0012] In an embodiment, the monitoring module is further included; the monitor support includes an assembly plate and a plurality of first plate bodies; one end of the assembly plate close to the guide needle tip is a front end, one end of the assembly plate away from the guide needle tip is a rear end, and the monitoring module is detachably fixed to the front end; the plurality of first plate bodies are fixed to the rear end, and the second clamping part is arranged on the first plate body; the plurality of first plate bodies enclose an assembly cavity, the guide needle support is sleeved in the assembly cavity, and the sheath is sleeved outside the assembly cavity.

[0013] In an embodiment, the second elastic member is further included, one end of the second elastic member abuts against the sheath, and the other end of the second elastic member abuts against the rear end of the assembly plate; the second elastic member is in a compressed state, and the second elastic member is used to provide power for the axial movement of the monitor support, so that the monitor support can synchronously move axially with the guide needle support.

[0014] In an embodiment, the monitoring device support further comprises a second plate body, one end of the second plate body is fixed to the rear end, the other end of the second plate body is provided with a first buckle part, the inner wall of the sheath is provided with a first buckle position, the first buckle part and the first buckle position are buckled and connected, so as to place the guide needle support and the monitoring device support in the first position, the first trigger body is arranged in the top of the upper cover, the first trigger body is used to move axially to the side close to the first buckle part, so as to release the connection between the first buckle part and the first buckle position.

[0015] In an embodiment, the monitoring device support further comprises a third plate body, one end of the third plate body is fixed to the rear end, the other end of the third plate body is provided with an abutting surface, the abutting surface is an inclined surface, the second trigger body is further arranged in the top of the upper cover, the second trigger body is used to move axially to the side close to the abutting surface, so as to abut with the abutting surface, when the second trigger body and the abutting surface abut, the second trigger body can provide the third plate body with a radial outward force and an axial force to the side close to the front end.

[0016] In an embodiment, the third plate body and the first plate body are connected circumferentially, the third plate body is provided with a third stop part close to the side of the sheath, the third stop part is located between the rear end and the abutting surface, the sheath is provided with a third surrounding part close to the side of the third plate body, the side close to each other of the third stop part and the third surrounding part is an inclined surface which is parallel to each other and inclined, in the first position, the third stop part and the third surrounding part are distributed axially, when the third stop part and the third surrounding part abut, the third surrounding part is used to assist the second holding part and the first holding part to separate.

[0017] In an embodiment, a guide structure is arranged between the sheath and the upper cover, and / or a first limiting structure is arranged between the sheath and the upper cover, the first limiting structure is used to limit the relative position between the upper cover and the sheath.

[0018] In an embodiment, the sheath is provided with a avoiding slot, the outer wall of the assembly plate is provided with a limiting part, part of the limiting part passes through the avoiding slot and is arranged between the sheath and the upper cover, the avoiding slot is used for the axial movement of the limiting part, the inner wall of the upper cover is provided with a second limiting structure, the second limiting structure is used to limit the axial movement range of the limiting part.

[0019] In an embodiment, the monitoring device support further comprises a lower cover, the lower cover and the upper cover are detachably connected, one end of the sheath close to the lower cover is used to contact with the base body.

[0020] In one embodiment, a rotation-preventing structure is provided between the guide needle holder and the monitor holder.

[0021] In one embodiment, the guide needle holder comprises an outer ring body, a connecting body is provided on the outer wall of the outer ring body, one end of the connecting body is connected with the outer ring body, and the other end of the connecting body is connected with a guide plate, the first clamping part and the first stop part are provided on the guide plate; any one of a groove or a convex rib is provided on the inner wall of the assembly cavity, and the other one of a groove and a convex rib is provided on the outer side wall of the outer ring body, and the groove and the convex rib are embedded.

[0022] In one embodiment, a second guide structure is provided between the sheath and the monitor holder.

[0023] According to the injection device for analyte sensor implantation in the above embodiments, the first clamping part is provided on the guide needle holder, the second clamping part is provided on the monitor holder, and the guide needle holder and the monitor holder have two relative positions, namely the first position and the second position. In the first position, the first clamping part is located between the second clamping part and the guide needle tip, and the first clamping part and the second clamping part are spaced apart. In the second position, the first clamping part and the second clamping part are in contact. In this way, when the monitor holder moves towards the side close to the base body during use of the injection device, the monitor holder can first move alone, and the second clamping part on the monitor holder continuously moves towards the first clamping part on the guide needle holder until the second clamping part and the first clamping part are in contact, and then the monitor holder and the guide needle holder can move synchronously. In this process, the monitor holder and the guide needle holder are both in a one-way movement process, and by the order of movement of the monitor holder and the guide needle holder, the relative distance between the monitor holder and the guide needle holder can be increased, that is, the guide needle holder moves away from the base body or retracts relative to the monitor holder, thereby effectively simplifying the use process of the injection device. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is an exploded structural schematic diagram of the injection device in one embodiment of the present application;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of the guide needle holder in one embodiment of the present application;

[0026] Figure 3 It is a three-dimensional structural schematic diagram of the monitor holder in one embodiment of the present application;

[0027] Figure 4 It is an assembly structural schematic diagram of the guide needle holder and the monitor holder in one embodiment of the present application;

[0028] Figure 5 It is a three-dimensional structural schematic diagram of the sheath in one embodiment of the present application;

[0029] Figure 6 Partial perspective view of the injection device according to an embodiment of the present application;

[0030] Figure 7 Internal structure of the upper cover according to an embodiment of the present application;

[0031] Figure 8 Sectional view of the injection device according to an embodiment of the present application;

[0032] Figure 9 Perspective view of the injection device according to an embodiment of the present application;

[0033] Figure 10 Partial perspective view of the injection device according to an embodiment of the present application;

[0034] Figure 11 Sectional view of the injection device in initial position according to an embodiment of the present application (1);

[0035] Figure 12 Sectional view of the injection device in use according to an embodiment of the present application (1);

[0036] Figure 13 Sectional view of the injection device in initial position according to an embodiment of the present application (2);

[0037] Figure 14 Sectional view of the injection device in use according to an embodiment of the present application (2);

[0038] Figure 15 Sectional view of the injection device at the end of use according to an embodiment of the present application.

[0039] Explanation of reference signs: 10. guide needle, 11. guide sleeve, 20. guide needle holder, 21. outer ring body, 22. inner ring body, 23. connecting body, 24. guide plate, 241. first clamping portion, 242. first stop portion, 25. ridge, 30. monitor holder, 31. assembly plate, 31a. front end, 31b. rear end, 311. first guide portion, 3111. first guide groove, 3112. second guide groove, 312. limiting portion, 32. first plate body, 321. second clamping portion, 33. second plate body, 331. first clamping portion, 332. second stop portion, 34. third plate body, 341. abutting surface, 342. third stop portion, 35. groove, 36. sleeving member, 40. first elastic member, 50. sheath, 50a. distal end, 50b. proximal end, 51. outer tube, 511. outer tube guide groove, 512. second clamping portion, 513. avoiding groove, 514. second guide portion, 5141. first guide column, 5142. second guide column, 52. inner tube, 521. first guide rail, 5211. stop block, 522. second guide rail, 5221. first clamping position, 5222. first enclosing portion, 523. third guide rail, 5231. third enclosing portion, 524. protruding portion, 60. monitoring module, 61. sensor cap, 62. housing, 63. monitor, 64. analyte sensor, 65. adhesive patch, 70. second elastic member, 80. upper cover, 81. first actuating body, 82. second actuating body, 83. guide ridge, 84. first block body, 85. second block body, 86. third block body, 87. third clamping portion, 90. lower cover, 91. third clamping position, J. base body. DETAILED DESCRIPTION

[0040] The application will be further described below in connection with specific embodiments with reference to the attached drawings. Like elements in different embodiments are denoted by like reference numerals. In the following description, numerous specific details are described to provide a thorough understanding of the application. However, those skilled in the art will recognize that the application can be practiced without these specific details. In other instances, well-known structures have not been described in detail in order to avoid obscuring the application. In the following embodiments, many of the features are described in detail in order to make the application better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different cases, or can be replaced by other elements, materials, methods. In some cases, some operations related to the application are not shown or described in the specification in order to avoid the core of the application being overwhelmed by too much description, and it is not necessary for those skilled in the art to understand the related operations in detail according to the description in the specification and the general technical knowledge in the art.

[0041] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0042] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0043] like Figures 1-15 As shown, one embodiment of this application provides an injection device for implanting an analyte sensor 64, including: a guide needle 10, a guide needle support 20, and a monitor support 30.

[0044] The guide pin 10 is used to assist the analyte sensor 64 in entering the substrate J (e.g., human skin).

[0045] The guide needle support 20 is provided with a first holding part 241, and the guide needle 10 is fixed to the guide needle support 20. The guide needle 10 is moved synchronously through the guide needle support 20.

[0046] The monitor bracket 30 is provided with a second holding part 321, and the guide needle bracket 20 and the monitor bracket 30 are movably connected.

[0047] The guide needle holder 20 and the monitor holder 30 have a first position and a second position relative to each other. In the first position, the first holding part 241 is located between the second holding part 321 and the tip of the guide needle 10, and the first holding part 241 and the second holding part 321 are spaced apart. In the second position, the first holding part 241 and the second holding part 321 are in contact.

[0048] The number of first retaining parts 241 and second retaining parts 321 can be one or more, and the number of first retaining parts 241 and second retaining parts 321 can be the same or different. For example, three first retaining parts 241 and one second retaining part 321 can be set, as long as the second retaining part 321 is aligned with any one of the first retaining parts 241. Alternatively, the number of first retaining parts 241 and second retaining parts 321 can be the same, and both can be set to multiple. In this way, multiple first retaining parts 241 and multiple second retaining parts 321 correspond one-to-one, facilitating a more stable force from the monitor bracket 30 to the guide needle bracket 20, enabling the monitor bracket 30 and the guide needle bracket 20 to move synchronously and stably.

[0049] The injection device for analyte sensor 64 implantation in the above embodiment is provided with a first clamping portion 241 on the guide needle support 20, a second clamping portion 321 on the monitor support 30, and two relative positions between the guide needle support 20 and the monitor support 30, namely the first position and the second position. In the first position, the first clamping portion 241 is located between the second clamping portion 321 and the needle tip of the guide needle 10, and the first clamping portion 241 and the second clamping portion 321 are spaced apart. In the second position, the first clamping portion 241 and the second clamping portion 321 are in contact. In this way, when the monitor support 30 moves towards the side close to the base J during use of the injection device, the monitor support 30 can first move alone, and the second clamping portion 321 on the monitor support 30 continuously moves towards the first clamping portion 241 on the guide needle support 20 until the second clamping portion 321 and the first clamping portion 241 are in contact, and then the monitor support 30 and the guide needle support 20 can move synchronously. In this process, the monitor support 30 and the guide needle support 20 are both in a one-way movement process, and by controlling the sequence of movement of the monitor support 30 and the guide needle support 20, the relative distance between the monitor support 30 and the guide needle support 20 can be increased, i.e. the guide needle support 20 will move or retract relative to the monitor support 30 away from the side close to the base J, effectively simplifying the use process of the injection device.

[0050] As shown in Figure 8 The injection device further comprises a guide sleeve 11, a sensor cap 61 and a monitoring module 60. The guide needle 10 is fixed to the guide sleeve 11, and the guide sleeve 11 is fixed to the guide needle support 20, i.e. the guide needle 10 is indirectly fixed to the guide needle support 20 through the guide sleeve 11. Specifically, part of the guide needle 10 is fixed in the guide sleeve 11, and the guide sleeve 11 can protect the guide needle 10. In the first position, part of the guide sleeve 11, part of the guide needle 10 and the sensor cap 61 are located at the end of the monitor support 30 close to the needle tip of the guide needle 10, and the sensor cap 61 and the guide sleeve 11 are sleeved. The monitoring module 60 comprises a monitor 63, and the monitoring module 60 is fixed to the end of the monitor support 30 close to the needle tip of the guide needle 10.

[0051] The sensor cap 61 is similar to the sterilization cap of the guide needle 10, providing protection for the guide needle 10. In the first position, part of the guide sleeve 11 protrudes and is placed on the end of the monitor bracket 30 near the tip of the guide needle 10, facilitating the installation and fixation of the sensor cap 61. When using the injection device, the sensor cap 61 is removed to expose the guide needle 10. At this time, if the monitor bracket 30 and the guide needle bracket 20 move synchronously, the guide sleeve 11 will first abut against the base J, leaving the monitoring module 60 a distance away from the base J, affecting the use of the monitoring module 60. Correspondingly, some structures need to be designed to assist the guide sleeve 11 in retraction, which increases the structural and operational complexity of the injection device. Correspondingly, the injection device designed in this application can increase the relative distance between the monitor support 30 and the guide needle support 20 by adjusting the sequence of their movements. In other words, the guide needle support 20 (and the guide sleeve 11 on it) will retract relative to the monitor support 30 towards the side away from the substrate J, effectively simplifying the structure and operation of the injection device.

[0052] In the first position, the axial length of the guide sleeve 11 at the end of the monitor bracket 30 away from the tip of the guide needle 10 is L1, for example... Figure 11 As shown. In the second position, the axial length of the guide sleeve 11 at the end of the monitor bracket 30 away from the tip of the guide needle 10 is L2, for example, as... Figure 12 As shown, where L1 < L2. L1 < L2 reduces the interference of the guide sleeve 11 on the monitoring module 60; the larger L2 is, the smaller the impact of the guide sleeve 11 on the monitoring module 60. More preferably, with... Figure 12 For example, the lower end of the guide sleeve 11 is flush with the lower end of the monitoring bracket, or the lower end of the guide sleeve 11 is recessed away from the tip of the guide needle 10 relative to the lower end of the monitoring bracket 30, so as to avoid the guide sleeve 11 affecting the use of the monitoring module 60.

[0053] like Figures 1-2 as well as Figure 5, the injection device further comprises a first elastic member 40 and a sheath 50. The first elastic member 40 has one end abutting against the guide needle holder 20 and the other end abutting against the monitor holder 30, and is in a compressed state. The sheath 50 movably sleeves the monitor holder 30, the guide needle holder 20 sleeves the inner side of the monitor holder 30, and the sheath 50 sleeves the outer side of the monitor holder 30. The guide needle holder 20 is provided with a first stop portion 242, the first elastic member 40 is located between the first stop portion 242 and the needle tip of the guide needle 10, and the first stop portion 242 abuts against the sheath 50 at the first position. Correspondingly, the inner wall of the sheath 50 is provided with a stop block 5211, and the first stop portion 242 abuts against the stop block 5211 on the sheath 50. The number relationship between the first stop portion 242 and the stop block 5211 can be the same as the number relationship between the first clamping portion 241 and the second clamping portion 321, that is, the number of the first stop portion 242 can be the same as or different from the number of the stop block 5211.

[0054] For the convenience of description, one end of the sheath 50 is named as a distal end 50a and the other end is named as a proximal end 50b, and the distal end 50a is used to abut against the base J. In use of the injection device, the sheath 50 abuts against the base J, the sheath 50 is stationary relative to the base J, and the monitor holder 30 moves axially relative to the sheath 50 or moves towards the base J. As shown in Figure 11 When the second clamping portion 321 on the monitor holder 30 and the first clamping portion 241 on the guide needle holder 20 are not in contact, the stop block 5211 on the sheath 50 gives the guide needle holder 20 a downward force, and the first elastic member 40 (for example, a spring) in the compressed state gives the guide needle holder 20 an upward force, and under the cooperation of the stop block 5211 and the first elastic member 40, the position of the guide needle holder 20 relative to the sheath 50 is unchanged. Figure 11 When the second clamping portion 321 and the first clamping portion 241 are in contact when the monitor holder 30 continues to move towards the base J (i.e., the monitor holder 30 moves downward in the middle), the monitor holder 30 can drive the guide needle holder 20 to move synchronously towards the base J. Figure 12 As shown in

[0055] As shown in Figure 3As shown, specifically, the monitor support 30 includes an assembly plate 31 and a plurality of first plate bodies 32. The assembly plate 31 has a front end 31a close to the tip of the guide needle 10 and a rear end 31b away from the tip of the guide needle 10, and the monitoring module 60 is detachably fixed to the front end 31a. The plurality of first plate bodies 32 are all fixed to the rear end 31b, and the first plate bodies 32 are provided with second clamping portions 321. The plurality of first plate bodies 32 enclose an assembly cavity, the guide needle support 20 is sleeved in the assembly cavity, and the sheath 50 is sleeved outside the assembly cavity. The plurality of first plate bodies 32 enclose the assembly cavity, and the assembly cavity is formed relative to a ring-shaped or cylindrical body. This can not only reduce the weight of the monitor support 30, but also facilitate the first stop portion 242 on the guide needle support 20 to abut against the stop block 5211 on the sheath 50 through the space in the circumferential direction of the adjacent first plate body 32.

[0056] As shown in Figure 1 and Figure 8 , the injection device further comprises a second elastic member 70, one end of the second elastic member 70 abuts against the sheath 50, and the other end of the second elastic member 70 abuts against the rear end 31b of the assembly plate 31. The second elastic member 70 is in a compressed state, and the second elastic member 70 is used to provide power for the axial movement of the monitor support 30, so that the monitor support 30 can move axially synchronously with the guide needle support 20. Under the action of the second elastic member 70, power can be provided through the mechanical structure of the injection device itself to facilitate the movement of the monitor support 30 and the synchronous movement of the monitor support 30 and the guide needle support 20, so that the user does not need to apply power to the monitor support 30, thereby simplifying the use process of the injection device. Moreover, when the user relies on the force to act on the monitor support 30, different users cannot guarantee the movement distance of the monitor support 30 due to differences in experience, use methods, etc., that is, it is difficult to guarantee the depth of the guide needle 10 inserted into the human skin. However, by using the injection device of the present application, the pre-set compression deformation amount of the second elastic member 70 can be combined with the structure of the injection device to better guarantee the consistency of the length of the guide needle 10 inserted into the human skin.

[0057] Specifically, as shown in Figure 5 , the sheath 50 comprises an outer tube 51 and an inner tube 52 connected together, and the second elastic member 70 (for example, a spring) is sleeved in the space between the outer tube 51 and the inner tube 52. Based on the difference in use scenarios of the outer tube 51 and the inner tube 52, the axial length of the outer tube 51 is greater than the axial length of the inner tube 52. When the sheath 50 comprises the outer tube 51 and the inner tube 52, the installation space provided for the second elastic member 70 facilitates the compact design of the structure of the injection device and the shortening of the axial length of the injection device. In other embodiments, the second elastic member 70 can also be placed between the inner tube 52 and the assembly plate 31, one end of the second elastic member 70 abuts against the inner tube 52, and the other end of the second elastic member 70 abuts against the rear end 31b of the assembly plate 31.

[0058] like Figures 3-7 In this embodiment, the injection device further includes a top cover 80, which is movably sleeved on the outside of the sheath 50. The monitor bracket 30 also includes a second plate 33, one end of which is fixed to the rear end 31b, and the other end of which is provided with a first latching part 331. The inner wall of the sheath 50 is provided with a first latching position 5221, and the first latching part 331 and the first latching position 5221 are latched together to place the guide needle bracket 20 and the monitor bracket 30 in a first position. The top of the top cover 80 is provided with a first actuating body 81, which is used to move axially toward the side closer to the first latching part 331 to release the connection between the first latching part 331 and the first latching position 5221.

[0059] The first latching part 331 and the first latching position 5221 cooperate to lock or restrict the position of the monitor bracket 30 relative to the sheath 50. When the position of the monitor bracket 30 is locked or restricted, the states of the first elastic element 40 and the second elastic element 70 are also restricted, and the position of the guide needle bracket 20 is also restricted. When the injection device needs to be used, the sheath 50 is brought into contact with the human skin, such as... Figure 11 As shown, the user only needs to press the top cover 80 towards the skin to cause the first actuating body 81 to move axially towards the side closer to the first latching part 331, thereby releasing the connection between the first latching part 331 and the first latching position 5221. After the connection between the first latching part 331 and the first latching position 5221 is released, under the action of the first elastic member 40, the monitor bracket 30 will move towards the side closer to the skin until the second holding part 321 on the monitor bracket 30 and the first holding part 241 on the guide needle bracket 20 contact. Then, the compressed second elastic member 70 continues to drive the monitor bracket 30 and the guide needle bracket 20 to move synchronously until the monitoring module 60 of the monitor bracket 30 comes into contact with the skin (e.g., as shown). Figure 12 As shown, the monitor bracket 30 and guide needle bracket 20 can no longer move, and at this time the guide needle 10 assists the analyzer sensor 64 to enter the human skin.

[0060] like Figure 3 As shown, the second plate 33 has a first latching part 331 on its radially upward inner side and a second stopping part 332 on its radially upward outer side. Figure 5 As shown, the inner wall of the inner tube 52 of the sheath 50 is provided with a first guide rail 521 and a second guide rail 522. The first guide rail 521 is provided with a stop block 5211. The second guide rail 522 is provided with a first buckle position 5221 at one end near the proximal end 50b and a first enclosure part 5222 at one end near the distal end 50a.

[0061] like Figure 11As shown, initially, the first clamping portion 331 and the first clamping position 5221 are clamped to limit the position of the monitor support 30 relative to the sheath 50, and at this time, the second stop portion 332 and the first surrounding portion 5222 are spaced apart axially. The surface of the first clamping portion 331 and the first trigger body 81 that approach each other is an inclined surface. When the upper cover 80 is pressed down, the first trigger body 81 moves axially downward, and the first trigger body 81 and the first clamping portion 331 abut, and the first trigger body 81 gives the first clamping portion 331 a radial outward force and an axial downward force to release the connection between the first clamping portion 331 and the first clamping position 5221.

[0062] As shown in FIG. 6, the first clamping portion 331 is a clamping block, and the first clamping position 5221 is a clamping groove. Figure 12 As shown, under the action of the second elastic member 70, the monitor support 30 is moved to a preset position, at which time the implantation of the analyte sensor 64 is also completed, and the second stop portion 332 and the first surrounding portion 5222 abut to limit the excessive movement of the monitor support 30 and cause unnecessary extrusion damage to the human skin. When the monitor 63 moves axially, the second stop portion 332 moves in the second guide rail 522.

[0063] As shown in FIG. 6, the first clamping portion 331 is a clamping block, and the first clamping position 5221 is a clamping groove. Figure 5 and Figure 7 As shown, the first clamping position 5221 is two adjacent clamping blocks in the circumferential direction, and there is a gap between the two clamping blocks. The end surface of the first clamping portion 331 contacts the clamping block, and the first trigger body 81 is a T-shaped block to facilitate the first trigger body 81 to pass through the gap formed in the first clamping position 5221 to press the first clamping portion 331 to the side of the distal end 50a.

[0064] The number of second plate bodies 33 can be one or more. The second plate body 33 and the first plate body 32 are two independent plate bodies, and the second plate body 33 and the first plate body 32 form an assembly cavity to facilitate the monitor support 30 and the guide needle support 20 to have more contact area and better support. In other embodiments, the second plate body 33 and the first plate body 32 can be an integral structure, or the second plate body 33 and the first plate body 32 are the same plate body, for example, the first clamping portion 241 is arranged on the side wall of the second plate body 33, so that the second plate body 33 can also play the role of the first plate body 32.

[0065] As shown in FIG. 6, the first clamping portion 331 is a clamping block, and the first clamping position 5221 is a clamping groove. Figures 3-7As shown, in the embodiment of the present application, the monitor support 30 further comprises a third plate body 34, one end of the third plate body 34 is fixed to the rear end 31b, and the other end of the third plate body 34 is provided with an abutting surface 341 which is an inclined surface. The inner top of the upper cover 80 is further provided with a second touch body 82, the second touch body 82 is used to move axially to the side close to the abutting surface 341, so as to abut against the abutting surface 341. When the second touch body 82 and the abutting surface 341 abut against each other, the second touch body 82 can give the third plate body 34 a force radially outward and a force axially to the side close to the front end 31a. Through the cooperation of the second touch body 82 and the abutting surface 341, the force required to press the upper cover 80 is increased, that is, the user needs to press the upper cover 80 with greater force, so that the designed injection device has the function of preventing accidental opening, and the phenomenon that the monitor support 30 is unlocked from the position by gently pressing the upper cover 80 is avoided.

[0066] As shown in the drawings, Figure 3 The third plate body 34 and the first plate body 32 are connected circumferentially, the third plate body 34 is provided with a third stop portion 342 close to the sheath 50, and the third stop portion 342 is located between the rear end 31b and the abutting surface 341. The inner wall of the inner tube 52 of the sheath 50 is provided with a third guide rail 523, and the third guide rail 523 is provided with a third surrounding portion 5231. The surface close to each other of the third stop portion 342 and the third surrounding portion 5231 is an inclined surface which is parallel to each other. Figure 13 As shown, in the first position, the third stop portion 342 and the third surrounding portion 5231 are axially spaced, and the third stop portion 342 can move along the third guide rail 523. Figure 14 As shown, when the third stop portion 342 moves downward and abuts against the third surrounding portion 5231, the inclined surfaces between the third stop portion 342 and the third surrounding portion 5231 make the third surrounding portion 5231 provide the third stop portion 342 with a force radially inward and a force axially upward, so as to assist the second clamping portion 321 and the first clamping portion 241 to be radially staggered and axially spaced. When the second clamping portion 321 and the first clamping portion 241 are separated, that is, not in contact, the first elastic member 40 and the second elastic member 70 are still in a compressed state, at this time, the second elastic member 70 will continue to give the monitor support 30 a downward force, but the first elastic member 40 will give the guide needle support 20 an upward force, and the guide needle support 20 will synchronously drive the guide needle 10 to move upward, that is, the guide needle 10 is taken out from the human skin.

[0067] As shown in the drawings, Figure 15The monitoring module 60 comprises a sensor cap 61, a housing 62, a monitor 63, an analyte sensor 64, and an adhesive 65. The monitor 63 is fixed in the housing 62, and the analyte sensor 64 is partially fixed in the housing 62 and partially inserted into the guide needle 10. One end of the housing 62 is detachably fixed to the assembly plate 31, and the other end is bonded to the adhesive 65, and the end of the adhesive 65 away from the assembly plate 31 is used to bond to the human skin. When the guide needle 10 is removed from the human skin, the user moves the upper cover 80 upward (i.e., moves away from the base J), the assembly plate 31 is separated from the housing 62, and the monitoring module 60 is fixed to the base J. It can be understood that, based on the use requirements of the monitoring module 60, the connection strength between the housing 62 and the assembly plate 31 is lower than the bonding strength of the adhesive 65 and the housing 62.

[0068] As shown in Figure 5 , the outer wall of the inner tube 52 is provided with a protruding portion 524, and the protruding portion 524 corresponds to the position of the guide rail on the inner wall of the outer tube 51, for example, one protruding portion 524 is arranged on the outer wall of the inner tube 52 corresponding to the position of the first guide rail 521, the second guide rail 522, and the third guide rail 523. The protruding portion 524 can maintain the wall thickness of the inner tube 52 at the position of the guide rail, that is, to make the wall thickness difference of the inner tube 52 at different positions in the circumferential direction as small as possible, thereby facilitating the protection of the structural strength of the inner tube 52.

[0069] As shown in Figures 6-7 and Figure 13 , a guide structure is arranged between the sheath 50 and the upper cover 80, for example, an outer tube guide groove 511 is arranged on the outer wall of the outer tube 51 of the sheath 50, and a corresponding guide rib 83 is arranged on the inner wall of the upper cover 80. The outer tube guide groove 511 and the guide rib 83 cooperate to assist the axial movement of the upper cover 80 relative to the sheath 50. A first limiting structure is arranged between the sheath 50 and the upper cover 80, and the first limiting structure is used to limit the relative position between the upper cover 80 and the sheath 50. For example, a second buckle portion 512 is arranged on the outer wall of the outer tube 51 of the sheath 50 near the proximal end 50b, and a first block 84 is arranged on the inner wall of the upper cover 80. When the sheath 50 is inserted into the upper cover 80 during assembly of the injection device, the second buckle portion 512 and the first block 84 are buckled and connected, and at the same time, the position of the upper cover 80 relative to the sheath 50 can be limited due to the contact between the first trigger body 81 and the first buckle position 5221 or the contact between the second trigger body 82 and the abutting surface 341. As shown in Figure 14 , when the upper cover 80 is pressed down, the second buckle portion 512 will not affect the movement of the upper cover 80.

[0070] As shown in Figures 3-7As shown, the sheath 50 is provided with a relief groove 513, the outer side wall of the assembly plate 31 is provided with a limiting portion 312, part of the limiting portion 312 passes through the relief groove 513 and is arranged between the sheath 50 and the upper cover 80, and the relief groove 513 is used for axial movement of the limiting portion 312. The inner wall of the upper cover 80 is provided with a second limiting structure, and the second limiting structure is used for limiting the axial movement range of the limiting portion 312. Specifically, the relief groove 513 is arranged on the side wall of the outer tube 51 of the sheath 50, and the second limiting structure is the second block 85 and the third block 86 which are axially spaced apart and arranged on the inner wall of the upper cover 80. The second block 85 and the third block 86 limit the axial movement range of the limiting portion 312, that is, limit the axial movement range of the assembly plate 31 (the monitor support 30), so that the length of the guide needle 10 inserted into the human skin is consistent each time the injection device is used, and the phenomenon that the insertion length of the guide needle 10 is inconsistent when different users use the injection device is avoided, thereby ensuring the use effect of the injection device.

[0071] As shown in the drawings, Figure 1 The injection device further includes a lower cover 90, the lower cover 90 and the upper cover 80 are detachably connected, and one end of the sheath 50 close to the lower cover 90 is used for contacting the base J. Specifically, the outer side wall of the upper cover 80 is provided with a third buckle portion 87, the inner side wall of the lower cover 90 is provided with a third buckle site 91, the third buckle portion 87 and the third buckle site 91 are buckled and connected, and the upper cover 80 and the lower cover 90 are detachably connected. In other embodiments, the third buckle site 91 can be arranged on the inner side wall of the upper cover 80, the third buckle portion 87 can be arranged on the outer side wall of the lower cover 90, or the upper cover 80 and the lower cover 90 are connected in a threaded connection, adhesive connection or other connection mode.

[0072] More preferably, in the embodiment of the present application, the anti-rotation structure is arranged between the guide needle support 20 and the monitor support 30. As shown in the drawings, Figure 2 and Figure 4 Specifically, the guide needle support 20 includes an outer ring body 21, the outer wall of the outer ring body 21 is provided with a connecting body 23, one end of the connecting body 23 is connected with the outer ring body 21, the other end of the connecting body 23 is connected with a guide plate 24, the guide plate 24 is provided with a first clamping portion 241 and a first stop portion 242, for example, the end of the guide plate 24 away from the front end 31a of the assembly plate 31 is provided with the first stop portion 242, and the side wall of the guide plate 24 is provided with the first clamping portion 241. The inner wall of the assembly cavity is provided with any one of a groove 35 or a convex rib 25, the outer side wall of the outer ring body 21 is provided with the other one of the groove 35 and the convex rib 25, and the groove 35 and the convex rib 25 are concave-convexly embedded, for example, the inner wall of the assembly cavity is provided with the groove 35, the outer side wall of the outer ring body 21 is provided with the convex rib 25, the number of the groove 35 is consistent with the number of the convex rib 25, for example, the groove 35 and the convex rib 25 are both provided as three, and taking the convex rib 25 as an example, the three convex ribs 25 are arrayed around the axis of the guide needle support 20.

[0073] The guide plate 24 can be slidably connected through the monitor support 30 and the first guide rail 521, for example, the guide plate 24 is slidably connected through the space between the first plate body 32 and the second plate body 33 and the first guide rail 521. This structure can preliminarily prevent the rotation of the guide needle support 20. In cooperation with the convex rib 25 and the groove 35, the position of the guide needle support 20 in the circumferential direction relative to the monitor support 30 can be further accurately limited, so as to avoid the rotation of the guide needle support 20 relative to the monitor support 30, and thus prevent the rotation of the guide needle 10 when the injection device is used, thereby avoiding the pain or the phenomenon of increasing the trauma to the user.

[0074] As shown in Figures 2-4 The guide needle support 20 further includes an inner ring body 22, the first elastic member 40 is sleeved in the space between the inner ring body 22 and the outer ring body 21, and the guide sleeve 11 is fixed on the inner ring body 22. The assembly plate 31 in the assembly cavity is provided with a sleeving member 36, the outer ring body 21 is sleeved on the outer side of the sleeving member 36, and the assembly plate 31 in the sleeving member 36 is provided with a through hole for the guide sleeve 11 to pass through. The sleeving member 36 is, for example, a sleeve structure.

[0075] Preferably, a second guide structure is arranged between the sheath 50 and the monitor support 30. As shown in Figures 3-5 The outer side wall of the assembly plate 31 is provided with at least one first guide part 311, and the inner wall of the outer tube 51 of the sheath 50 is provided with at least one second guide part 514. The first guide part 311 and the second guide part 514 are arranged one by one to enhance the smoothness of the axial movement of the monitor support 30 relative to the sheath 50. Specifically, the first guide part 311 includes a first guide groove 3111 and a second guide groove 3112 arranged on the side wall of the assembly plate 31, and the second guide part 514 includes a first guide column 5141 and a second guide column 5142 arranged on the inner wall of the outer tube 51. The first guide groove 3111 and the first guide column 5141 are matched in concave-convex, and the second guide groove 3112 and the second guide column 5142 are matched in concave-convex. Here, the two groups of guide structures can ensure the guiding effect when the monitor support 30 moves, and the length of the first guide groove 3111 is L3, the length of the second guide groove 3112 is L4, and L4 < L3. The length of L4 can be equal to the thickness of the assembly plate 31. It should be noted that the lengths refer to the lengths in the axial direction of the monitor support 30. The length of the first guide groove 3111 is larger, which can be matched with the first guide column 5141 to ensure the stability of the connection between the monitor support 30 and the sheath 50 under the premise of guiding.

[0076] The use method of the injection device designed in the present application is as follows:

[0077] As shown in Figures 9-10As shown, when using the injection device, the user needs to open the lower cover 90 first, and remove the lower cover 90 to expose the guide needle 10 and the adhesive pad 65. At this time, the tip of the guide needle 10 is away from the distal end 50a of the sheath 50 by a distance, which ensures that the guide needle 10 will not first penetrate the skin when the user adheres the distal end 50a of the sheath 50 to the skin of the human body. Specifically, the user can rotate the lower cover 90 to unscrew the lower cover 90.

[0078] After adhering the distal end 50a of the sheath 50 to the skin of the human body, as shown in Figure 11 As shown, the first clamping portion 241 and the second clamping portion 321 are spaced apart, the first stop portion 242 and the stop block 5211 abut, the first buckle portion 331 and the first buckle site 5221 are buckled and connected, and the first trigger body 81 and the first buckle portion 331 are adjacent. As shown in Figure 13 As shown, the abutment surface 341 and the third surrounding stop portion 5231 are spaced apart, and the second trigger body 82 contacts the abutment surface 341. At this time, the first elastic member 40 and the second elastic member 70 in the injection device are in a compressed state.

[0079] After adhering the distal end 50a of the sheath 50 to the skin of the human body, the user presses the upper cover 80 towards the skin side, as shown in Figure 11 As shown, the first trigger body 81 extrudes the first buckle portion 331 to move downwards, and the monitor support 30 moves downwards. At the same time, as shown in Figure 13 As shown, the second trigger body 82 extrudes the abutment surface 341 to move downwards, which also causes the monitor 63 to move downwards. After the monitor 63 moves downwards by a distance, the second clamping portion 321 and the first clamping portion 241 are buckled, and under the action of the second elastic member 70, the monitor support 30 and the guide needle support 20 move downwards synchronously by a distance. At this time, as shown in Figure 12 As shown, the second clamping portion 321 and the first clamping portion 241 are buckled, as shown in Figure 14 As shown, the inclined surface of the third stop portion 342 contacts the inclined surface of the third surrounding stop portion 5231, and the third surrounding stop portion 5231 gives the third stop portion 342 a radial inward force and an axial upward force, so that the second clamping portion 321 on the first plate body 32 and the first clamping portion 241 on the guide needle support 20 are separated. After the second clamping portion 321 and the first clamping portion 241 are separated, under the action of the first elastic member 40 in a compressed state, the guide needle support 20 is given an upward force, and the needle retraction operation is realized. Moreover, in the process of needle retraction, because the anti-rotation structure is provided between the monitor support 30 and the guide needle support 20, the guide needle 10 can be retracted into the sheath 50 without rotating. Before the upper cover 80 is pressed, the relative position between the upper cover 80 and the sheath 50 is as shown in Figure 11 or Figure 13 After the upper cover 80 is pressed, the relative position between the upper cover 80 and the sheath 50 is as shown in Figure 12 or Figure 14As shown.

[0080] The injection device is used to implant the analyte sensor 64 and retract the guide needle 10. The analyte sensor 64 and the guide needle 10 are implanted and retracted within less than one second after the upper cover 80 is pressed. That is, after the upper cover 80 is pressed, the user can quickly pull the upper cover 80 away from the skin. The upper cover 80, the sheath 50, and the monitor 63 move away from the skin. At this time, as shown, the shell 62 of the monitoring module 60 and the assembly plate 31 of the monitor support 30 are separated. Figure 15

[0081] The injection device designed in the present application has the following advantages:

[0082] Through the structural design and the first elastic member 40 and the second elastic member 70 set in advance, the monitor support 30 and the guide needle support 20 can move according to the preset distance. Since the monitor support 30 moves first, the preset distance of the monitor support 30 is larger. Therefore, when the injection device is used, the user does not need to rely on the user's experience to achieve consistent guide needle 10 implantation effect, ensure the success rate of guide needle 10 implantation, and avoid the situation that the guide needle 10 is implanted excessively or insufficiently due to the user's lack of experience. Moreover, the injection device designed only needs to press the upper cover 80 to achieve the guide needle 10 implantation, without the need to assemble the injection device, thereby reducing the difficulty of use for the user.

[0083] After the guide needle 10 is implanted, the third stop portion 342 and the third surrounding stop portion 5231 cooperate to release the limit of the monitor support 30 and the guide needle support 20, and the guide needle 10 is retracted after reaching the preset movement distance in the entire use process. Therefore, it is not necessary to worry about whether the guide needle 10 is retracted too early, thereby ensuring the success rate of guide needle 10 implantation.

[0084] The anti-rotation structure is added to the monitor support 30 and the guide needle support 20. The anti-rotation structure can avoid the rotation of the guide needle 10 during the implantation of the guide needle 10 and the rotation of the guide needle 10 during the retraction of the guide needle 10. The retraction action of the guide needle 10 is more reliable and the pain is lower.

[0085] The injection device has a simple structure and is easy to operate. Since the guide needle support 20 and the sheath 50 are directly provided with the abutting structure (i.e., the first stop portion 242 and the stop block 5211), during assembly, the guide needle support 20 is sleeved on the monitor support 30. Then, the monitor support 30 is sleeved or inserted in the sheath 50. The first buckle portion 331 and the first buckle position 5221 are buckled and connected. Therefore, the assembly of the injection device can be achieved without the need for additional jigs for assembly work. The injection device designed is relatively easy to assemble.

[0086] ​The above describes the present application by using specific examples, which is only used to help understand the present application and does not limit the present application. According to the idea of the present application, a person skilled in the art of the present application can make several simple deductions, deformations or substitutions.

Claims

1. An injection device for analyte sensor implantation, characterized by, The utility model relates to an analyte sensor insertion device, comprising: a guide needle for assisting analyte sensor insertion into a host; a guide needle holder having a first holding portion, the guide needle being fixed to the guide needle holder; a monitor holder having a second holding portion, the guide needle holder and the monitor holder being movably coupled; the guide needle holder and the monitor holder having a first position and a second position, in the first position, the first holding portion is located between the second holding portion and the tip of the guide needle, and the first holding portion and the second holding portion are spaced apart, in the second position, the first holding portion and the second holding portion are in contact; a first elastic member and a sheath, one end of the first elastic member is in abutment with the guide needle holder, the other end of the first elastic member is in abutment with the monitor holder, the first elastic member is in a compressed state, the sheath is movably coupled with the monitor holder, the guide needle holder is coupled inside the monitor holder, and the sheath is coupled outside the monitor holder, the guide needle holder has a first stop portion, the first elastic member is located between the first stop portion and the tip of the guide needle, in the first position, the first stop portion is in abutment with the sheath; a monitoring module, the monitor holder includes an assembly plate and a plurality of first plate bodies, one end of the assembly plate close to the tip of the guide needle is a front end, the other end of the assembly plate away from the tip of the guide needle is a rear end, the monitoring module is detachably fixed to the front end, the plurality of first plate bodies are fixed to the rear end, the first plate bodies are provided with the second holding portion, the plurality of first plate bodies enclose an assembly cavity, the guide needle holder is coupled inside the assembly cavity, and the sheath is coupled outside the assembly cavity; a second elastic member, one end of the second elastic member is in abutment with the sheath, the other end of the second elastic member is in abutment with the rear end of the assembly plate, the second elastic member is in a compressed state, and the second elastic member is used for providing power for axial movement of the monitor holder, so that the monitor holder can synchronously move axially with the guide needle holder. a guide sleeve and a sensor cap, the guide needle is fixed to the guide sleeve, the guide sleeve is fixed to the guide needle holder, in the first position, part of the guide sleeve, part of the guide needle and the sensor cap are located at one end of the monitor holder close to the tip of the guide needle, the sensor cap and the guide sleeve are coupled, and the axial length of the guide sleeve away from the tip of the guide needle at the other end of the monitor holder is L1, in the second position, the axial length of the guide sleeve away from the tip of the guide needle at the other end of the monitor holder is L2, and L1 < L2.

2. The injection device for analyte sensor implantation of claim 1, wherein, ​ 3. The injection device for analyte sensor implantation of claim 1, wherein, The monitoring instrument support further comprises a second plate body, one end of the second plate body is fixed to the rear end, and the other end of the second plate body is provided with a first buckle part; a first buckle position is arranged on the inner wall of the sheath, the first buckle part and the first buckle position are buckled and connected, so as to place the guide needle support and the monitoring instrument support in the first position; a first touch body is arranged in the top of the upper cover, the first touch body is used for moving axially to the side close to the first buckle part, so as to release the connection between the first buckle part and the first buckle position.

4. The injection device for analyte sensor implantation of claim 3, wherein, The monitoring instrument support further comprises a third plate body, one end of the third plate body is fixed to the rear end, and the other end of the third plate body is provided with an abutting surface, the abutting surface is an inclined surface; a second touch body is further arranged in the top of the upper cover, the second touch body is used for moving axially to the side close to the abutting surface, so as to abut against the abutting surface; when the second touch body and the abutting surface abut against each other, the second touch body can provide the third plate body with a force radially outward and a force axially to the side close to the front end.

5. The injection device for analyte sensor implantation of claim 4, wherein, The third plate body and the first plate body are connected in the circumferential direction, the third plate body is provided with a third stop part close to the side of the sheath, the third stop part is located between the rear end and the abutting surface; the sheath is provided with a third surrounding part close to the side of the third plate body, the side close to each other of the third stop part and the third surrounding part is an inclined surface which is parallel to each other and inclined; in the first position, the third stop part and the third surrounding part are distributed axially apart, when the third stop part and the third surrounding part abut against each other, the third surrounding part is used for assisting the second clamping part and the first clamping part to separate from each other.

6. The injection device for analyte sensor implantation of claim 3, wherein, The sheath and the upper cover are provided with a guide structure and / or a first limiting structure between them, the first limiting structure is used for limiting the relative position between the upper cover and the sheath.

7. The injection device for analyte sensor implantation of claim 3, wherein, The sheath is provided with a avoiding slot, the outer side wall of the assembly plate is provided with a limiting part, part of the limiting part passes through the avoiding slot and is placed between the sheath and the upper cover, the avoiding slot is used for the axial movement of the limiting part; the inner wall of the upper cover is provided with a second limiting structure, the second limiting structure is used for limiting the axial movement range of the limiting part.

8. The injection device for analyte sensor implantation of claim 3, wherein, The lower cover is detachably connected with the upper cover, and the end of the sheath close to the lower cover is used for contacting with the base body.

9. The injection device for analyte sensor implantation of claim 1, wherein, The guide needle support and the monitoring instrument support are provided with an anti-rotation structure.

10. The injection device for analyte sensor implantation of claim 9, wherein, The guide needle support comprises an outer ring body, the outer wall of the outer ring body is provided with a connecting body, one end of the connecting body is connected with the outer ring body, and the other end of the connecting body is connected with a guide plate, the guide plate is provided with the first clamping part and the first stop part; the inner wall of the assembly cavity is provided with any one of a groove or a convex rib, the outer side wall of the outer ring body is provided with the other one of a groove and a convex rib, and the groove and the convex rib are concave-convexly embedded.

11. The injection device for analyte sensor implantation of claim 1, wherein, The sheath and the monitoring instrument support are provided with a second guide structure.

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