Implantation device for analyte sensor

Abstract

The invention provides an implantation device of an analyte sensor. The implantation device comprises a shell, a sheath, a monitor bracket, a first elastic piece, a guide needle bracket and a second elastic piece, the sheath is provided with a locking part; the monitor bracket is provided with a matching part; the matching part is used for being locked with the locking part; the shell is used for abutting against the matching part so as to unlock the matching part and the locking part; the first elastic piece is mounted between the sheath and the monitor bracket; the shell is used for abutting against the first elastic piece before abutting against the matching part; after the matching part and the locking part are unlocked, the first elastic piece can drive the monitor support to move towards the far end, the second elastic piece is arranged between the monitor support and the guide needle support, and the second elastic piece is used for driving the guide needle support to move towards the near end after the guide needle support moves towards the far end to a preset position. According to the implantation device of the analyte sensor, the situation that the sheath triggers the guide needle support to retract in advance is prevented, and the implantation success rate of the analyte sensor is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an implantable device for an analyte sensor. Background Art

[0002] Diabetes can lead to numerous complications, including coma, poisoning, neuropathy, and cardiovascular and cerebrovascular disease. Therefore, diabetic patients need to know whether their glucose levels are within a safe range. However, traditional measurement methods are cumbersome, require deep wounds, are painful, and can only measure a single value, making it difficult for diabetic patients to understand their glucose levels in real time. To enable diabetic patients to understand their glucose levels in real time, some choose to wear analyte sensors. These sensors require an implantable device, which is inserted into the body through an introducer needle to allow the sensor to come into contact with body fluids.

[0003] The analyte sensor is installed on the guide needle, and the monitor is installed on the monitor bracket of the implant device. The monitor bracket is locked with the sheath before use, and a spring is set between the sheath and the monitor bracket. When the user unlocks the monitor bracket, the monitor bracket can move toward the part of the human body to be implanted under the action of the spring. The monitor bracket can drive the guide needle on the guide needle bracket to penetrate the human body to insert the analyte sensor into the human body.

[0004] The guide needle needs to be retracted when it is implanted to a certain depth in the human body, that is, the guide needle bracket needs to be retracted when it moves to a preset position. An abutment structure is provided on the sheath to initiate the retraction of the guide needle bracket. However, after the sheath and the monitor bracket are unlocked, the elastic force of the spring will cause the sheath to retract first relative to the shell outside the sheath, resulting in a change in the position of the abutment structure of the sheath, so that the guide needle bracket is activated to retract by the abutment structure of the sheath before it moves to the preset position. This causes the guide needle to retract before the analyte sensor is fully implanted in the human body, thereby increasing the failure rate of the analyte sensor implantation. Summary of the Invention

[0005] The present invention provides an analyte sensor implantation device, which can solve the problem that a sheath retracts before an introducer needle support retracts, resulting in a high implantation failure rate of the analyte sensor.

[0006] In order to solve the above technical problems, the present application provides an implantation device for an analyte sensor, comprising a shell, a sheath, a monitor bracket, a first elastic member, a guide needle bracket, and a second elastic member. The sheath has a distal end and a proximal end arranged opposite to each other, and the distal end is used to contact the part of the human body to be implanted; the sheath is movably connected to the shell so that the shell can move toward the distal end relative to the sheath; the sheath has a locking portion; the monitor bracket is used to install the monitor; the monitor bracket has a matching portion, and the matching portion is used to lock with the locking portion; the shell is used to abut against the matching portion to release the lock between the matching portion and the locking portion; the first elastic member is installed between the sheath and the monitor bracket; the shell is used to abut against the first elastic member before abutting against the matching portion, so that one end of the first elastic member abuts against the shell, and the second elastic member is used to abut against the first elastic member before abutting against the matching portion. The other end of an elastic member abuts against the monitor bracket; after the mating portion and the locking portion are unlocked, the first elastic member can drive the monitor bracket to move toward the distal end; the guide needle bracket is used to install the guide needle, and when the monitor bracket moves toward the distal end, it can drive the guide needle bracket to move toward the distal end; the second elastic member is arranged between the monitor bracket and the guide needle bracket, and the second elastic member is used to drive the guide needle bracket to move toward the proximal end after the guide needle bracket moves toward the distal end to a preset position; when the guide needle bracket moves toward the proximal end, it can abut against the sheath to promote the synchronous movement of the sheath.

[0007] In one embodiment, an assembly cavity is provided in the shell, at least part of the sheath is located in the assembly cavity and is slidably connected to the shell, and the side of the assembly cavity close to the distal end has an opening. Before the guide needle bracket pushes the sheath to move, the distal end of the sheath is set outside the assembly cavity through the opening, or the end face of the distal end of the sheath is flush with the opening; after the guide needle bracket pushes the sheath to move, the sheath can abut the cavity wall of the assembly cavity close to the proximal end, and the distal end of the sheath is located in the assembly cavity.

[0008] In one embodiment, a sliding channel is provided in the sheath and passes through the sheath, and the monitor bracket can slide in the sliding channel; a mounting position is provided in the monitor bracket, and the guide needle bracket is installed at the mounting position; a first abutting portion and a locking portion are provided at the proximal end, and the first abutting portion is provided on the moving path of the guide needle bracket when it moves toward the proximal end, so as to abut against the guide needle bracket.

[0009] In one embodiment, the monitor bracket has a pushing portion, and the guide needle bracket has a second abutting portion. Before the mating portion is unlocked, the second abutting portion is located on the movement path of the pushing portion, and the pushing portion is used to push the second abutting portion when the monitor bracket moves toward the distal end; the sheath has a first unlocking portion, and the first unlocking portion is used to release the stop of the second abutting portion by the pushing portion after the guide needle bracket moves to a preset position.

[0010] In one embodiment, the monitor bracket has a third abutment portion, which is connected to the pushing portion in a circumferential direction. The first unlocking portion has a first inclined surface. When the guide needle bracket moves toward the distal end to a preset position, the third abutment portion can abut the first inclined surface and slide on the first inclined surface. The first inclined surface is used to guide the third abutment portion so that the third abutment portion drives the pushing portion to break away from the movement path of the second abutment portion.

[0011] In one embodiment, the sheath has an elastic stop portion; before the pushing portion abuts against the second abutting portion, the pushing portion is spaced apart from the second abutting portion, the elastic stop portion limits the guide needle bracket on the side of the guide needle bracket close to the proximal end, and the second elastic member has an elastic restoring force toward the proximal end; the monitor bracket has a first limiting portion, which is located on the outside of the elastic stop portion before the pushing portion abuts against the second abutting portion to limit the elastic stop portion, and the first limiting portion is separated from the elastic stop portion after the pushing portion abuts against the second abutting portion, and the elastic stop portion expands toward the outside under the action of the elastic force of the elastic stop portion to disengage from the movement path of the guide needle bracket.

[0012] In one embodiment, the elastic stop portion has a second inclined surface, the guide needle bracket has a third inclined surface, and the second inclined surface is used to abut against the third inclined surface to limit the guide needle bracket.

[0013] In one embodiment, the sheath has an annular outer wall and an annular inner wall, and the annular outer wall is sleeved on the outer circumference of the annular inner wall; the monitor bracket has a mounting portion, and the mounting portion is located on the side of the annular inner wall away from the proximal end; the matching portion, the pushing portion and the first limiting portion are all connected to the side of the mounting portion away from the distal end, and before the matching portion is unlocked, the matching portion and the pushing portion are located on the inner side of the annular inner wall, and the first limiting portion and the first elastic member are located between the annular outer wall and the annular inner wall; an elastic stop portion and a first unlocking portion are provided on the annular inner wall, and the first elastic member abuts against the mounting portion.

[0014] In one embodiment, the guide needle bracket is located on the side of the mounting portion close to the proximal end, and the guide needle bracket is located on the inner side of the pushing portion and the mating portion; the second elastic member is located between the mounting portion and the guide needle bracket; a through hole is provided on the mounting portion for allowing the guide needle to pass through the mounting portion, and the side of the mounting portion close to the distal end is used to install a monitor.

[0015] In one embodiment, the proximal end has a top wall, which is located on the side of the first elastic member away from the distal end, and the first elastic member is assembled between the top wall and the monitor bracket; a notch is provided on the top wall that passes through the top wall, and the first elastic member is exposed in the notch, and the shell has a fourth abutment portion, and the notch is used for the fourth abutment portion to pass through so that the fourth abutment portion can abut against the first elastic member.

[0016] The present application also provides an implantation device for an analyte sensor, which includes a shell, a sheath, a monitor bracket, a first elastic member, and a guide needle bracket. The housing comprises a second unlocking portion and a fourth abutting portion; the sheath comprises a distal end and a proximal end oppositely disposed, the distal end being configured to contact a portion of the human body to be implanted; the sheath is movably connected to the housing so that the housing can move distally relative to the sheath; the sheath comprises a locking portion; a monitor bracket is configured to mount a monitor; the monitor bracket is mounted within the sheath, the monitor bracket comprising a mating portion configured to lock with the locking portion, the second unlocking portion being located on a side of the mating portion away from the distal end, the second unlocking portion being configured to abut against the mating portion to release the lock between the mating portion and the locking portion; a first elastic member is mounted between the fourth abutting portion and the monitor bracket, the fourth abutting portion being located on a side of the first elastic member away from the distal end, the fourth abutting portion being configured to abut against the first elastic member before the second unlocking portion abuts against the mating portion, so that the housing is subjected to the elastic restoring force of the first elastic member when moving distally; after the mating portion and the locking portion are released, the elastic restoring force of the first elastic member can drive the monitor bracket to move distally; and a guide needle bracket is configured to mount a guide needle, and the monitor bracket can drive the guide needle bracket to move distally.

[0017] In one embodiment, before the housing moves toward the distal end, in the movement direction of the housing, the distance between the first elastic member and the fourth abutting portion is smaller than the distance between the second unlocking portion and the fitting portion.

[0018] In one embodiment, the proximal end has a top wall, which is located on the side of the first elastic member away from the distal end, and the first elastic member is assembled between the top wall and the monitor bracket; a notch is provided on the top wall that passes through the top wall, and the first elastic member is exposed in the notch, and the notch is used for the fourth abutting portion to pass through so that the fourth abutting portion can abut against the first elastic member.

[0019] In one embodiment, the fourth abutment portion includes an abutment wall and a blocking portion, the number of the abutment walls is at least two, and the at least two abutment walls are arranged at intervals along the circumferential direction of the first elastic member. The blocking portion is protruded on the side of the abutment wall facing the first elastic member, and the blocking portion is located on the inner side of the first elastic member in the radial direction of the first elastic member.

[0020] In one embodiment, the sheath has an annular outer wall and an annular inner wall, the annular outer wall is arranged at intervals on the outer circumference of the annular inner wall, and the top wall is connected to the side of the annular outer wall away from the distal end and the side of the annular inner wall away from the distal end; the first elastic member is assembled between the annular outer wall and the annular inner wall to be arranged on the outer circumference of the annular inner wall; the notch is connected to the gap between the annular outer wall and the annular inner wall.

[0021] In one embodiment, the number of the notches and the fourth abutting portions is at least two, at least two notches are arranged at intervals along the circumferential direction, and each fourth abutting portion is respectively arranged opposite to each notch.

[0022] In one embodiment, the monitor bracket has a pushing portion, and the guide needle bracket has a second abutting portion. Before the mating portion is unlocked, the second abutting portion is located on the movement path of the pushing portion, and the pushing portion is used to push the second abutting portion when the monitor bracket moves toward the distal end.

[0023] In one embodiment, the sheath has an elastic stop portion; before the pushing portion abuts against the second abutting portion, the pushing portion is spaced apart from the second abutting portion, and the elastic stop portion limits the guide needle bracket on the side of the guide needle bracket close to the proximal end, and the implantation device of the analyte sensor includes a second elastic member, which is installed between the monitor bracket and the guide needle bracket, and the second elastic member has an elastic restoring force toward the proximal end; the monitor bracket has a first limiting portion, which is located on the outside of the elastic stop portion before the pushing portion abuts against the second abutting portion to limit the elastic stop portion, and the elastic stop portion has a second inclined surface, and the guide needle bracket has a third inclined surface, and the second inclined surface is used to abut against the third inclined surface to limit the guide needle bracket.

[0024] In one embodiment, the mating portion has a fourth inclined surface, the second unlocking portion has a fifth inclined surface, the shell can slide in a straight line relative to the sleeve, the fourth inclined surface is used to abut and slide relative to the fifth inclined surface, and the second unlocking portion drives the mating portion to move in a radially outward direction to release the lock between the mating portion and the locking portion.

[0025] In one embodiment, the mating portion includes an extension arm and a snap block connected to each other, the snap block has a fourth inclined surface on the side away from the extension arm, and the locking portion has an installation channel; when the mating portion is locked with the locking portion, the end of the extension arm close to the snap block is located in the installation channel, the first abutting surface of the snap block close to the extension arm abuts against the end surface of the locking portion away from the distal end, and the installation channel is located radially outward from the first abutting surface.

[0026] The implant device of the analyte sensor is configured by arranging a first elastic member between the shell and the monitor bracket, so that the fourth abutting portion of the shell can abut against the first elastic member before the second unlocking portion abuts against the matching portion, that is, the fourth abutting portion abuts against the first elastic member before the monitor bracket and the sheath are unlocked; since the force of the accidental touch is often smaller than the elastic restoring force of the first elastic member, when the shell is accidentally touched and causes the shell to abut against the first elastic member, the elastic restoring force of the first elastic member can serve as resistance to resist the force of the accidental touch, and the force of the accidental touch is not sufficient to overcome the elastic restoring force of the first elastic member to cause the shell to move toward the distal end, and when the shell abuts against the first elastic member, the second unlocking portion has not yet abutted against the matching portion, that is, the first elastic member acts as an anti-accidental touch part that provides resistance, which can prevent the matching portion from being unlocked, thereby achieving an anti-accidental touch effect. When the user presses the shell and the user's pressing force is greater than the elastic restoring force of the first elastic member, the shell can be driven to move toward the distal end while abutting against the first elastic member, so that the second unlocking part of the shell abuts against the matching part to release the lock between the matching part and the locking part, so that the monitor bracket can move relative to the sheath. The monitor bracket can move toward the distal end driven by the elastic restoring force of the first elastic member, and drive the guide needle bracket to move toward the distal end, so that the guide needle can assist the analyte sensor to be implanted into the human body. The anti-trigger part of the implantation device of the analyte sensor of the present application is the first elastic member. The user does not need to remove the anti-trigger part before use, and no unnecessary operation is caused to the user. While having the anti-mistouch function, the user can directly press the shell to trigger it during use, which is easy for the user to operate.

[0027] In the implantation device of the analyte sensor of the present application, the shell is the part pressed by the user to drive the shell to move relative to the sheath to release the lock of the monitor bracket and the sheath, and the shell will first abut the first elastic member in the sheath before unlocking the monitor bracket, so that when the monitor bracket and the sheath are unlocked, one end of the first elastic member abuts the shell, and the other end of the first elastic member abuts the monitor bracket. Therefore, when the monitor bracket and the sheath are unlocked, the end of the first elastic member away from the monitor bracket abuts the shell instead of the sheath, thereby preventing the problem that the first elastic member will push the sheath to retract at the moment the monitor bracket and the sheath are unlocked, so that when the monitor bracket moves toward the part to be implanted in the human body, the position of the sheath is relatively stable, preventing the sheath from triggering the retraction of the guide needle bracket in advance, so as to improve the success rate of the analyte sensor implantation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of an implantable device for an analyte sensor according to an embodiment of the present application; Figure 2 A cross-sectional view of an implantable device of an analyte sensor provided in an embodiment of the present application in an initial state; Figure 3A schematic structural diagram of a housing provided in one embodiment of the present application; Figure 4 A schematic structural diagram of a sheath provided in one embodiment of the present application; Figure 5 Another cross-sectional view of the implant device of the analyte sensor provided by one embodiment of the present application in the initial state; Figure 6 A schematic structural diagram of the sheath, monitor bracket, guide needle bracket, and first elastic member provided in an embodiment of the present application in an initial state; Figure 7 An exploded view of the monitor bracket, the guide needle bracket, and the second elastic member provided in one embodiment of the present application; Figure 8 A schematic structural diagram of a sheath provided in an embodiment of the present application from another perspective; Figure 9 A schematic diagram of the structure of a guide needle bracket and a monitor bracket provided in one embodiment of the present application; Figure 10 An exploded view of an implantable device for an analyte sensor according to an embodiment of the present application; Figure 11 Another cross-sectional view of the implant device of the analyte sensor provided by one embodiment of the present application in the initial state; Figure 12 This is a schematic diagram of the structure of the implantation device of the analyte sensor provided in one embodiment of the present application after the guide needle support and the sheath are completely retracted; Figure 13 This is a structural schematic diagram of the analyte sensor implant device provided by one embodiment of the present application when the first unlocking portion abuts the third abutting portion.

[0029] Reference numerals: housing 10, second unlocking portion 11, fifth inclined surface 111, fourth abutting portion 12, abutting wall 121, blocking portion 122, housing body 13, assembly cavity 131, opening 1311, slider 1312, protrusion 14, trigger portion 15, sheath 20, distal end 21, proximal end 22, slide rail 23, second limiting portion 24, locking portion 25, installation channel 251, first abutting portion 252, top wall 26, notch 261, annular outer wall 27, sliding channel 271, sliding body 2711, channel opening 2712, annular Inner wall 28, elastic stop portion 29, second inclined surface 291, first unlocking portion 200, first inclined surface 201, monitor bracket 30, slide groove 31, matching portion 32, fourth inclined surface 321, extension arm 322, snap block 323, third abutting portion 33, mounting portion 34, through hole 341, pushing portion 35, first limiting portion 36, mounting position 361, first elastic member 40, guide needle bracket 50, second abutting portion 51, third inclined surface 52, second elastic member 60, monitor 70, guide needle 80, needle sleeve 81, cover 90. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions, and for those skilled in the art, it is not necessary to describe these related operations in detail. They will fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0031] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0032] Component numbers used herein, such as "first" and "second," are used solely to distinguish the components being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0033] The terms "parallel" and "perpendicular" are defined in terms of the current state of the art, rather than being absolutely strict definitions in a mathematical sense. A small amount of deviation is allowed, and being approximately parallel or approximately perpendicular is acceptable. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0° and 10°. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80° and 100°. The directional terms mentioned in the embodiments of the present application, such as "upper", "inner", "outer", "side", etc., are only with reference to the direction when the product is used. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0034] Most existing implantable devices use a button trigger. To prevent accidental button triggering, they often include an anti-trigger component, which requires users to remove the anti-trigger component before use, creating unnecessary user operations. The present invention provides an analyte sensor implantable device that addresses this issue of requiring additional user operations due to the addition of an anti-trigger component.

[0035] Please refer to Figure 1 and Figure 2 The present application provides an implantable device for an analyte sensor (hereinafter referred to as an implantable device), which includes a housing 10, a sheath 20, a monitor bracket 30, a first elastic member 40, and a guide needle bracket 50. Figure 2 and Figure 3 As shown, the housing 10 has a second unlocking portion 11 and a fourth abutting portion 12. Specifically, the housing 10 also has a housing body 13. The housing body 13 of the housing 10 defines an assembly cavity 131. A portion of the sheath 20 is positioned within the assembly cavity 131. The sheath 20 has a distal end 21 and a proximal end 22 that are positioned opposite each other. The distal end 21 is intended to contact the portion of the human body where the analyte sensor is to be implanted (hereinafter referred to as the "implantation site"). The proximal end 22 is the end distal from the implantation site. The second unlocking portion 11 and the fourth abutting portion 12 are disposed on the wall of the assembly cavity 131, located on the side of the assembly cavity 131 near the proximal end 22.

[0036] The sheath 20 is movably connected to the housing 10 so that the housing 10 can move toward the distal end 21 relative to the sheath 20 when a pressing force toward the distal end 21 is applied. Specifically, the sheath 20 is slidably connected to the housing 10. Figure 3 and Figure 4As shown, one of the outer wall of the sheath 20 and the inner wall of the assembly cavity 131 can be provided with a slider 1312, and the other can be provided with a slide rail 23. The slider 1312 cooperates with the slide rail 23 to enable the sheath 20 to be slidably connected to the housing 10. Preferably, the sheath 20 and the housing 10 slide relative to each other in a straight line direction, that is, the slide rail 23 is a linear slide rail 23 to ensure the sliding stability between the sheath 20 and the housing 10. One end of the slide rail 23 is close to the proximal end 22, and the other end of the slide rail 23 is close to the distal end 21. Specifically, the extension direction of the slide rail 23 is parallel to the central axis of the sheath 20. Figure 3-Figure 5 As shown, a second limiting portion 24 is provided on the outer wall of the sheath 20, and a protrusion 14 is provided on the inner wall of the assembly cavity 131. The second limiting portion 24 and the protrusion 14 are at least partially arranged opposite to each other, and at least a portion of the second limiting portion 24 is stopped at the side of the protrusion 14 away from the distal end 21 to prevent the shell 10 from moving relative to the sheath 20 toward the side close to the proximal end 22.

[0037] like Figure 2 and Figure 6 As shown, the monitor bracket 30 is installed in the sheath 20, and the side of the monitor bracket 30 facing the distal end 21 is used to install the monitor 70. Specifically, as shown in FIG. Figure 7 and Figure 8 As shown, the sheath 20 is provided with a sliding channel 271 that passes through the proximal end 22 and the distal end 21 of the sheath 20, and the monitor bracket 30 is connected to the inner wall of the sliding channel 271. At least a portion of the monitor bracket 30 is located within the sliding channel 271. The monitor bracket 30 can slide within the sliding channel 271 after being unlocked from the sheath 20. The monitor bracket 30 is provided with a sliding groove 31, and the inner wall of the sliding channel 271 is provided with a sliding body 2711. The sliding groove 31 cooperates with the sliding body 2711. The sliding groove 31 is a linear sliding groove 31, so that the monitor bracket 30 and the sheath 20 can slide relative to each other along a straight line, thereby ensuring sliding stability between the two.

[0038] like Figure 2 and Figure 6As shown, the proximal end 22 of the sheath 20 has a locking portion 25, and the side of the monitor bracket 30 close to the proximal end 22 has a matching portion 32, and the matching portion 32 is used to lock with the locking portion 25. When the matching portion 32 is locked with the locking portion 25, the monitor bracket 30 and the sheath 20 cannot slide relative to each other, that is, the monitor bracket 30 and the sheath 20 are relatively locked. The second unlocking portion 11 of the shell 10 is located on the side of the matching portion 32 away from the distal end 21. When the shell 10 is not subjected to pressing pressure, that is, when the implant device is in the initial state, the second unlocking portion 11 and the matching portion 32 are relatively spaced apart. When the shell 10 is subjected to pressing pressure, the shell 10 moves toward the distal end 21 relative to the sheath 20, so that the distance between the second unlocking portion 11 and the matching portion 32 gradually decreases until the second unlocking portion 11 abuts against the matching portion 32, and further presses the shell 10 so that the shell 10 continues to move relative to the sheath 20 toward the distal end 21. The second unlocking portion 11 can release the lock of the matching portion 32 and the locking portion 25, so that the monitor bracket 30 and the sheath 20 can achieve relative sliding.

[0039] The first elastic member 40 is mounted between the fourth abutting portion 12 of the housing 10 and the monitor bracket 30. Specifically, the first elastic member 40 may be a spring. The fourth abutting portion 12 is located on the side of the first elastic member 40 away from the distal end 21. When the housing 10 is not subjected to a pressing force, one end of the first elastic member 40 abuts the monitor bracket 30, while the other end of the first elastic member 40 may abut the fourth abutting portion 12 instead of the sheath 20. Alternatively, the other end of the first elastic member 40 may abut the sheath 20 instead of the fourth abutting portion 12. Alternatively, the other end of the first elastic member 40 may abut both the sheath 20 and the fourth abutting portion 12. The fourth abutment 12 is used to abut against the first elastic member 40 before the second unlocking portion 11 abuts against the matching portion 32. After the shell 10 is subjected to the pressing force, the shell 10 moves relative to the sheath 20 toward the distal end 21, so that the fourth abutment 12 will abut on the first elastic member 40, and the shell 10 continues to move relative to the sheath 20 toward the distal end 21. At this time, the second unlocking portion 11 and the matching portion 32 have not yet abutted, that is, the sheath 20 and the monitor bracket 30 are relatively fixed. The fourth abutment 12 will compress the first elastic member 40, so that when the shell 10 moves toward the distal end 21, it is affected by the elastic restoring force of the first elastic member 40, that is, the user needs to overcome the elastic restoring force of the first elastic member 40 to continue to move the shell 10 toward the distal end 21. The shell 10 further moves toward the distal end 21 under the action of the pressing force until the second unlocking portion 11 abuts against the matching portion 32 and is unlocked, and the sheath 20 and the monitor bracket 30 can move relative to each other.

[0040] Before the user presses the housing 10, the mating portion 32 and the locking portion 25 are locked, the second unlocking portion 11 and the mating portion 32 are spaced apart, and the fourth abutting portion 12 may or may not abut the first elastic member 40. After the user presses the housing 10, before the second unlocking portion 11 abuts the mating portion 32, the fourth abutting portion 12 abuts the first elastic member 40. Therefore, before the mating portion 32 is unlocked by the second unlocking portion 11, the user needs to press the housing 10 further to overcome the elastic restoring force of the first elastic member 40. Only then does the mating portion 32 abut the second unlocking portion 11, unlocking the mating portion 32 and the locking portion 25.

[0041] In one embodiment, in the initial state of the implant device, that is, before the housing 10 moves toward the distal end 21, the distance between the first elastic member 40 and the fourth abutting portion 12 is less than the distance between the second unlocking portion 11 and the mating portion 32 in the direction of movement of the housing 10. The distance between the first elastic member 40 and the fourth abutting portion 12 may be zero or greater than zero, while the distance between the second unlocking portion 11 and the mating portion 32 is greater than zero. This ensures that, after the housing 10 moves, the abutment between the first elastic member 40 and the fourth abutting portion 12 occurs before the abutment between the second unlocking portion 11 and the mating portion 32.

[0042] After the locking portion 25 and the matching portion 32 are unlocked, the elastic restoring force of the first elastic member 40 can drive the monitor bracket 30 to move toward the distal end 21 relative to the sheath 20. Figure 2 and Figure 9 As shown, the guide needle bracket 50 is set on the monitor bracket 30. During the movement of the monitor bracket 30 toward the distal end 21, it can drive the guide needle bracket 50 to move toward the distal end 21. The guide needle bracket 50 is used to install the guide needle 80. The analyte sensor can be set on the guide needle 80. The movement of the guide needle bracket 50 toward the distal end 21 can drive the guide needle 80 to move toward the distal end 21 until the guide needle 80 penetrates the part to be implanted in the human body, so that the guide needle 80 successfully assists the analyte sensor to be inserted into the human body, so that the analyte sensor can contact the human body fluids, and the monitor 70 can detect the user's glucose level through the analyte sensor.

[0043] The implantation device of the analyte sensor is provided with a first elastic member 40 between the shell 10 and the monitor bracket 30. The fourth abutting portion 12 of the shell 10 can abut against the first elastic member 40 before the second unlocking portion 11 abuts against the matching portion 32, that is, the fourth abutting portion 12 abuts against the first elastic member 40 before the monitor bracket 30 and the sheath 20 are unlocked; because the force of the accidental touch is often smaller than the elastic restoring force of the first elastic member 40, when the shell 10 is accidentally touched and causes the shell 10 to abut against the first elastic member 40, the elastic restoring force of the first elastic member 40 can serve as a resistance to resist the force of the accidental touch, and the force of the accidental touch is not sufficient to overcome the elastic restoring force of the first elastic member 40 so that the shell 10 moves further toward the distal end 21, and when the shell 10 abuts against the first elastic member 40, the second unlocking portion 11 has not yet abutted against the matching portion 32, that is, the first elastic member 40 at this time acts as an anti-accidental touch component that provides resistance to prevent the matching portion 32 from being unlocked, thereby achieving anti-accidental touch. False touch effect; when the user presses the shell 10, when the user's pressing force is greater than the elastic restoring force of the first elastic member 40, the shell 10 can be driven to move toward one side of the distal end 21 while abutting against the first elastic member 40, so that the second unlocking portion 11 of the shell 10 abuts against the matching portion 32, releasing the lock between the matching portion 32 and the locking portion 25, so that the monitor bracket 30 can move relative to the sheath 20. The monitor bracket 30 can move toward the distal end 21 driven by the elastic restoring force of the first elastic member 40, and drive the guide needle bracket 50 to move toward the distal end 21, so that the guide needle 80 can assist the analyte sensor to be implanted in the human body. The anti-trigger part of the implant device of this application is the first elastic member 40. The user does not need to remove the anti-trigger part before use, and will not cause unnecessary operations to the user. While having the anti-false touch function, the user can directly press the shell 10 to trigger it when in use, which is easy for the user to operate.

[0044] In one embodiment, if Figure 2 and Figure 3 As shown, the mating portion 32 has a fourth inclined surface 321, and the second unlocking portion 11 has a fifth inclined surface 111. The shell 10 can slide in a straight line relative to the sheath 20. The fourth inclined surface 321 is used to abut and slide relative to the fifth inclined surface 111. The second unlocking portion 11 drives the mating portion 32 to move in a radially outward direction to release the lock between the mating portion 32 and the locking portion 25.

[0045] In one embodiment, if Figure 7 As shown, the mating portion 32 includes an extension arm 322 and a buckle block 323 connected to each other. The end of the extension arm 322 close to the proximal end 22 is connected to the buckle block 323. The monitor bracket 30 has a mounting portion 34. The end of the extension arm 322 close to the distal end 21 is connected to the mounting portion 34. The buckle block 323 has a fourth inclined surface 321 on the side away from the extension arm 322. Figure 4 As shown, the locking portion 25 has a mounting channel 251 therein. Figure 2 As shown, when the engaging portion 32 is locked with the locking portion 25, the end of the extension arm 322 near the latch block 323 is located within the mounting channel 251. The latch block 323 has a first abutting surface on the side of the extension arm 322 that abuts against the end surface of the locking portion 25 away from the distal end 21, preventing the monitor bracket 30 from moving toward the distal end 21 under the action of the first elastic member 40. The mounting channel 251 is located radially outward of the first abutting surface. After the second unlocking portion 11 pushes the latch block 323 outward, the first abutting surface of the latch block 323 moves toward the mounting channel 251 until the first abutting surface disengages from the end surface of the locking portion 25 away from the distal end 21 and is positioned opposite the mounting channel 251. This frees the latch block 323 from being restricted by the locking portion 25, allowing it to pass through the mounting channel 251. The monitor bracket 30 can then move toward the distal end 21 under the action of the first elastic member 40.

[0046] In one embodiment, if Figure 2 、 Figure 3 and Figure 7 As shown, the monitor bracket 30 has a third abutting portion 33, and the housing 10 has a trigger portion 15. In the initial state of the implant device, the trigger portion 15 abuts against the side of the third abutting portion 33 facing the proximal end 22 to further prevent accidental touch by the user. When the user applies a pressing force to the housing 10, the trigger portion 15 can push the third abutting portion 33 outward, so that the third abutting portion 33 is out of the motion path of the trigger portion 15, allowing the housing 10 to move toward the distal end 21. When the third abutting portion 33 abuts the trigger portion 15, the fourth abutting portion 12 of the housing 10 can be spaced apart from the first elastic member 40. When the user applies a pressing force, the housing 10 moves toward the distal end 21, allowing the fourth abutting portion 12 to abut against the first elastic member 40. When the user further applies a pressing force, the housing 10 moves further toward the distal end 21, causing the second unlocking portion 11 to abut against the mating portion 32.

[0047] like Figure 2 and Figure 6As shown, in one embodiment, the proximal end 22 of the sheath 20 has a top wall 26, which is located on a side of the first elastic member 40 away from the distal end 21. The first elastic member 40 is assembled between the top wall 26 and the monitor bracket 30. A notch 261 is defined in the top wall 26 and extends through the top wall 26. The first elastic member 40 is exposed in the notch 261. The notch 261 is configured to allow the fourth abutting portion 12 to pass through, thereby enabling the fourth abutting portion 12 to abut against the first elastic member 40. In this embodiment, before the housing 10 moves toward the distal end 21, the fourth abutting portion 12 of the housing 10 can have a certain distance from the first elastic member 40, that is, the fourth abutting portion 12 does not abut the first elastic member 40, and the two ends of the first elastic member 40 respectively abut the top wall 26 and the monitor bracket 30. When the housing 10 moves toward the distal end 21 until the fourth abutting portion 12 abuts the first elastic member 40, the user can overcome the elastic restoring force of the first elastic member 40 and further press the housing 10, thereby causing the housing 10 to push the first elastic member 40 to compress, causing the first elastic member 40 to separate from the top wall 26. The user further presses the housing 10 until the second unlocking portion 11 unlocks the mating portion 32 and the locking portion 25, and the user completes the triggering process. By providing a notch 261 on the top wall 26, the fourth abutting portion 12 can abut the first elastic member 40 installed in the sheath 20, so that the implant device can achieve the function of preventing accidental touch.

[0048] In one embodiment, if Figure 2 and Figure 3 As shown, the fourth abutting portion 12 includes an abutting wall 121 and a blocking portion 122. The number of the abutting walls 121 is at least two, for example, Figure 3 In the embodiment, there are three abutting walls 121. At least two abutting walls 121 are arranged at intervals along the circumferential direction of the first elastic member 40. It should be noted that the circumferential, radial, and axial directions described in this application can all refer to the circumferential, radial, and axial directions of the first elastic member 40. The blocking portion 122 is protruding from the side of the abutting wall 121 facing the first elastic member 40. The abutting wall 121 is used to abut the first elastic member 40. The blocking portion 122 is located on the inner side of the first elastic member 40 in the radial direction of the first elastic member 40. That is, when the abutting wall 121 abuts the first elastic member 40, the blocking portion 122 is located on the inner side of the first elastic member 40, thereby ensuring the stability of the abutment between the abutting wall 121 and the first elastic member 40, thereby ensuring the stability of the anti-accidental touch function.

[0049] In one embodiment, if Figure 2 、 Figure 4 and Figure 8As shown, the sheath 20 has an annular outer wall 27 and an annular inner wall 28. A sliding channel 271 is defined within the annular outer wall 27. The annular outer wall 27 is spaced apart and sleeved around the outer periphery of the annular inner wall 28, i.e., the annular inner wall 28 is located within the sliding channel 271. The top wall 26 is connected to the side of the annular outer wall 27 away from the distal end 21 and the side of the annular inner wall 28 away from the distal end 21. The first elastic member 40 is assembled between the annular outer wall 27 and the annular inner wall 28 to sleeve around the outer periphery of the annular inner wall 28. A notch 261 communicates with the gap between the annular outer wall 27 and the annular inner wall 28, such that the notch 261 exposes the first elastic member 40.

[0050] Further, if Figure 2 and Figure 7 As shown, the monitor bracket 30 has a mounting portion 34, which is disposed within the sliding channel 271 and located on the side of the annular inner wall 28 away from the proximal end 22. A mating portion 32 is connected to the side of the mounting portion 34 away from the distal end 21. Before the mating portion 32 is unlocked, the mating portion 32 is located inside the annular inner wall 28. A locking portion 25 is provided protruding from the inner wall of the annular inner wall 28 near the proximal end 22, and the locking portion 25 is locked with the mating portion 32. A portion of the mounting portion 34 is disposed opposite the space inside the annular inner wall 28, while another portion of the mounting portion 34 is disposed opposite the gap between the annular inner wall 28 and the annular outer wall 27, so that the other portion of the mounting portion 34 can abut the first elastic member 40, that is, the first elastic member 40 can abut against the mounting portion 34.

[0051] In one embodiment, if Figure 3 and Figure 4 As shown, the number of the notches 261 and the fourth abutting portion 12 is at least two, at least two notches 261 are arranged at intervals along the circumferential direction, and each fourth abutting portion 12 is arranged opposite to each notch 261. Figure 6 As shown, each notch 261 can expose a different circumferential portion of the first elastic member 40, so that each fourth abutting portion 12 can extend into the corresponding notch 261 to abut against a different circumferential portion of the first elastic member 40. Thus, when a user presses the housing 10, a relatively uniform resistance is applied at each circumferential position of the housing 10.

[0052] In one embodiment, if Figure 2As shown, the implant device further includes a guide needle 80, an opening 1311 on the side of the assembly cavity 131 near the distal end 21, and a channel opening 2712 on the side of the sliding channel 271 near the distal end 21. When the mating portion 32 is locked with the locking portion 25, the guide needle 80 is located inside the sheath 20, and there is a distance between the guide needle 80 and the channel opening 2712. As a result, when the user initially places the distal end 21 of the sheath 20 against the part of the human body to be implanted, there will be a distance between the guide needle 80 and the part of the human body to be implanted; this prevents the guide needle 80 from contacting the skin when the sheath 20 first contacts the human body, thereby preventing a negative experience for the user.

[0053] In some embodiments, as Figure 2 and Figure 10 As shown, the implant device may further include a cover 90, which is disposed on a side of the housing 10 near the distal end 21 to close the opening 1311 of the housing 10 and the channel opening 2712 of the sliding channel 271 of the sheath 20, thereby protecting the various components within the sheath 20. The cover 90 may be detachably connected to the housing 10, for example, by a snap connection, a threaded connection, a magnetic connection, or the like.

[0054] In one embodiment, if Figure 2 and Figure 9 As shown, the monitor bracket 30 has a pushing portion 35 connected to the side of the mounting portion 34 away from the distal end 21 and located on the inner side of the annular inner wall 28. The guide needle bracket 50 has a second abutting portion 51 located on the movement path of the pushing portion 35. The pushing portion 35 is used to push the second abutting portion 51 when the monitor bracket 30 moves toward the distal end 21. That is, when the monitor bracket 30 moves toward the distal end 21 under the action of the first elastic member 40, the pushing portion 35 can abut the second abutting portion 51 on the side away from the distal end 21 and, under the action of the first elastic member 40, push the second abutting portion 51 so that the second abutting portion 51 also moves toward the distal end 21. In this way, the guide needle 80 can assist in inserting the analyte sensor into the human body.

[0055] In one embodiment, if Figure 4 、 Figure 6 and Figure 11 As shown, the sheath 20 has an elastic stop portion 29. Before the push portion 35 abuts the second abutting portion 51, the push portion 35 is spaced apart from the second abutting portion 51. The elastic stop portion 29 limits the guide needle holder 50 on the side of the guide needle holder 50 near the proximal end 22. The implant device also includes a second elastic member 60, which is mounted between the mounting portion 34 of the monitor holder 30 and the guide needle holder 50. Part of the structure of the mounting portion 34 of the monitor holder 30 is located on the side of the second elastic member 60 facing the distal end 21. The second elastic member 60 has an elastic restoring force toward the proximal end 22.

[0056] like Figure 7 and Figure 11 As shown, the monitor bracket 30 has a first limiting portion 36. Before the push portion 35 abuts the second abutting portion 51, the first limiting portion 36 is located outside the elastic stop portion 29 to limit the elastic stop portion 29 outward. When limited by the first limiting portion 36, the elastic stop portion 29 exerts an elastic force that expands outward. The elastic stop portion 29 has a second inclined surface 291, and the guide needle bracket 50 has a third inclined surface 52. The second inclined surface 291 is configured to abut against the third inclined surface 52. As a result, the elastic stop portion 29 limits the guide needle bracket 50, preventing it from moving toward the proximal end 22. When the guide needle bracket 50 needs to move toward the proximal end 22, the third inclined surface 52 tends to push the second inclined surface 291 toward the proximal end 22 and the outside, and the first limiting portion 36 limits the elastic stop portion 29 on the outside, so that the elastic stop portion 29 cannot move toward the outside, thereby preventing the guide needle bracket 50 from moving toward the proximal end 22 at this time.

[0057] As a result, the guide needle bracket 50 has a tendency to move toward the proximal end 22 under the action of the elastic restoring force of the second elastic member 60, but the elastic stop portion 29 abuts against the guide needle bracket 50 on the other side of the guide needle bracket 50 away from the second elastic member 60, so that before the pushing portion 35 abuts against the second abutting portion 51, the guide needle bracket 50 maintains its position unchanged under the action of the elastic stop portion 29 and the second elastic member 60.

[0058] from Figure 2 It can be seen that the guide needle 80 is provided with a needle sheath 81, and a portion of the needle sheath 81 extends beyond the end surface of the monitor bracket 30 toward the distal end 21. If the guide needle bracket 50 and the monitor bracket 30 move directly and synchronously when the matching portion 32 and the locking portion 25 are unlocked, the needle sheath 81 will prevent the monitor 70 from being attached to the human skin. Therefore, this embodiment is provided with an elastic stopper 29 and a second elastic member 60. After the matching portion 32 and the locking portion 25 are unlocked, when the monitor bracket 30 starts to move toward the distal end 21, The guide needle bracket 50 maintains its position under the action of the elastic stop portion 29 and the second elastic member 60 until the monitor bracket 30 moves to the point where the pushing portion 35 abuts against the second abutting portion 51. At this time, the distal end 21 of the monitor bracket 30 is flush with the distal end 21 of the needle sleeve 81, and the elastic restoring force of the first elastic member 40 is greater than the elastic restoring force of the second elastic member 60. As a result, the pushing portion 35 can push the second abutting portion 51 toward the distal end 21, so that the monitor bracket 30 and the guide needle bracket 50 move synchronously.

[0059] As described in the background art, the present application needs to solve the problem that the sheath 20 retracts before the guide needle bracket 50 retracts, resulting in a high failure rate of analyte sensor implantation. Based on this, the implantation device may include a shell 10, a sheath 20, a monitor bracket 30, a first elastic member 40, a guide needle bracket 50, and a second elastic member 60. The sheath 20 has a distal end 21 and a proximal end 22 that are relatively arranged, and the distal end 21 is used to contact the part of the human body to be implanted; the sheath 20 is movably connected to the shell 10 so that the shell 10 can move relative to the sheath 20 toward the distal end 21; the sheath 20 has a locking portion 25; the monitor bracket 30 is used to install the monitor 70; the monitor bracket 30 has a mating portion 32, and the mating portion 32 is used to lock with the locking portion 25; the shell 10 is used to abut against the mating portion 32 to release the lock between the mating portion 32 and the locking portion 25; the first elastic member 40 is installed at between the sheath 20 and the monitor bracket 30; the housing 10 is used to abut against the first elastic member 40 before abutting against the matching portion 32, so that one end of the first elastic member 40 abuts against the housing 10 and the other end of the first elastic member 40 abuts against the monitor bracket 30; after the matching portion 32 and the locking portion 25 are unlocked, the first elastic member 40 can drive the monitor bracket 30 to move toward the distal end 21; the guide needle bracket 50 is used to install the guide needle 80, and when the monitor bracket 30 moves toward the distal end 21, it can drive the guide needle bracket 50 to move toward the distal end 21. Among them, the specific description of each feature of this embodiment and the embodiments below can refer to the description of the above embodiment, and can be combined with the content of any of the above embodiments to have the same features and achieve the same effects, and will not be repeated here.

[0060] The second elastic member 60 is disposed between the monitor bracket 30 and the guide needle bracket 50. The second elastic member 60 is used to drive the guide needle bracket 50 toward the proximal end 22 after the guide needle bracket 50 moves toward the distal end 21 to a preset position. When the guide needle bracket 50 moves to the preset position, the guide needle 80 should have assisted the analyte sensor in piercing the body's intended implant site. The surface of the monitor 70 facing the distal end 21 may have an adhesive member, and the adhesive member of the monitor 70 is adhered to the body's intended implant site. When the monitor bracket 30 and the guide needle bracket 50 move synchronously to the guide needle bracket 50's preset position, the monitor bracket 30 can release its push on the guide needle bracket 50, allowing the guide needle bracket 50 to move toward the proximal end 22 under the elastic restoring force of the second elastic member 60, while the monitor 70 and the analyte sensor remain in the body's intended implant site due to the adhesive member.

[0061] When the guide needle bracket 50 moves toward the proximal end 22, it can abut against the sheath 20 to push the sheath 20 to move synchronously, so that the sheath 20 moves toward the implanted part away from the human body, so that the sheath 20 is retracted into the interior of the housing 10. The state in which the sheath 20 is fully retracted into the interior of the housing 10 can be referred to. Figure 12 .

[0062] In the implant device, the shell 10 is the part pressed by the user to drive the shell 10 to move relative to the sheath 20 to release the lock of the monitor bracket 30 and the sheath 20, and the shell 10 will first abut the first elastic member 40 in the sheath 20 before abutting the monitor bracket 30, so that when the monitor bracket 30 and the sheath 20 are unlocked, one end of the first elastic member 40 abuts the shell 10, and the other end of the first elastic member 40 abuts the monitor bracket 30. As a result, when the monitor bracket 30 and the sheath 20 are unlocked, the end of the first elastic member 40 away from the monitor bracket 30 abuts the shell 10 instead of the sheath 20, thereby preventing the monitor bracket 30 from being unlocked. The problem that the first elastic member 40 pushes the sheath 20 to retract at the moment the monitor bracket 30 and the sheath 20 are unlocked makes the position of the sheath 20 relatively stable when the monitor bracket 30 moves toward the part to be implanted in the human body, preventing the sheath 20 from triggering the retraction of the guide needle bracket 50 in advance, so as to improve the success rate of the analyte sensor implantation. The sheath 20 will not retract when the monitor bracket 30 moves toward the part to be implanted in the human body, but after the guide needle bracket 50 retracts, that is, after the analyte sensor is implanted, the guide needle bracket 50 pushes the sheath 20 to retract. The timing of the retraction of the sheath 20 will not affect the implantation of the analyte sensor.

[0063] In addition, when the guide needle bracket 50 retracts, it drives the sheath 20 to retract, which can reduce the sound of the guide needle bracket 50 retracting into the shell 10. The guide needle bracket 50 will not directly hit the shell 10 during the retraction process, but will first abut against the sheath 20 and retract into the shell 10 synchronously with the sheath 20, which greatly reduces the sound of the guide needle bracket 50 retracting into the shell 10 and improves the user experience.

[0064] In one embodiment, if Figure 2 As shown, the housing 10 is provided with an assembly cavity 131, at least part of the sheath 20 is located in the assembly cavity 131 and is slidably connected to the housing 10, and the assembly cavity 131 has an opening 1311 on one side close to the distal end 21. Before the guide needle bracket 50 pushes the sheath 20 to move, the distal end 21 of the sheath 20 is set outside the assembly cavity 131 through the opening 1311, or the end surface of the distal end 21 of the sheath 20 is flush with the opening 1311. Figure 12 As shown, after the guide needle bracket 50 pushes the sheath 20 to move, the sheath 20 can abut the cavity wall of the assembly cavity 131 near the proximal end 22, and the distal end 21 of the sheath 20 is located in the assembly cavity 131, that is, the sheath 20 completes the process of retracting into the shell 10.

[0065] In one embodiment, if Figure 2 As shown, the sheath 20 is provided with a sliding channel 271 that passes through the sheath 20, and the monitor bracket 30 can slide in the sliding channel 271 after the matching portion 32 and the locking portion 25 are unlocked. Figure 6 and Figure 7 As shown, a mounting position 361 is provided in the monitor bracket 30, and the guide needle bracket 50 is installed at the mounting position 361. The proximal end 22 of the sheath 20 is provided with a first abutting portion 252 and a locking portion 25. The first abutting portion 252 is provided on the moving path of the guide needle bracket 50 when it moves toward the proximal end 22, so as to abut against the guide needle bracket 50. That is, the guide needle bracket 50 first moves independently relative to the sheath 20 toward the proximal end 22. After the guide needle bracket 50 moves to abut against the first abutting portion 252, the guide needle bracket 50 can push the first abutting portion 252 of the sheath 20, so that the guide needle bracket 50 and the sheath 20 retract synchronously. The first abutting portion 252 and the locking portion 25 can both be located on the inner side of the annular inner wall 28. Figure 6 In the embodiment of FIG. 2 , the first abutting portion 252 is provided on the locking portion 25 .

[0066] In one embodiment, as described above, Figure 2 As shown, the monitor bracket 30 has a pushing portion 35, and the guide needle bracket 50 has a second abutting portion 51. Before the mating portion 32 is unlocked, the second abutting portion 51 is located on the movement path of the pushing portion 35. The pushing portion 35 is used to push the second abutting portion 51 when the monitor bracket 30 moves toward the distal end 21. Figure 2 and Figure 13 As shown, the sheath 20 has a first unlocking portion 200, which is used to release the stop of the push portion 35 on the second abutting portion 51 after the guide needle bracket 50 moves to the preset position. Figure 4 and Figure 7 As shown, the monitor bracket 30 has a third abutting portion 33, which is connected to the pushing portion 35 in the circumferential direction, and the first unlocking portion 200 has a first inclined surface 201 on a side away from the distal end 21. Figure 4 、 Figure 7 and Figure 13 As shown, when the guide needle holder 50 moves toward the distal end 21 to a preset position, that is, after the guide needle holder 50 assists in implanting the analyte sensor into the human body, the third abutting portion 33 can abut against the first inclined surface 201 and slide on the first inclined surface 201. The first inclined surface 201 is used to guide the third abutting portion 33 so that the third abutting portion 33 moves inward. The third abutting portion 33 drives the pushing portion 35 to move inward as well, causing the pushing portion 35 to separate from the second abutting portion 51. The pushing portion 35 is then disengaged from the movement path of the second abutting portion 51, thereby releasing the position restriction of the pushing portion 35 on the guide needle holder 50. The guide needle holder 50 moves toward the proximal end 22 under the action of the second elastic member 60. In this way, the guide needle 80 can be automatically retracted.

[0067] In one embodiment, if Figure 6As shown, the sheath 20 has an elastic stop portion 29; before the pushing portion 35 abuts against the second abutting portion 51, the pushing portion 35 is spaced apart from the second abutting portion 51, and the elastic stop portion 29 limits the guide needle bracket 50 on the side of the guide needle bracket 50 close to the proximal end 22, and the second elastic member 60 has an elastic restoring force toward the proximal end 22; Figure 11 As shown, the monitor bracket 30 has a first limiting portion 36. Before the push portion 35 abuts the second abutting portion 51, the first limiting portion 36 is located outside the elastic stop portion 29 to limit the elastic stop portion 29 from expanding outward. In one embodiment, the elastic stop portion 29 has a second inclined surface 291, and the guide needle bracket 50 has a third inclined surface 52. The second inclined surface 291 is configured to abut against the third inclined surface 52 to limit the position of the guide needle bracket 50. The above process has been described in detail above. It should be noted that after the push portion 35 abuts the second abutting portion 51, the first limiting portion 36 moves downward to a position separated from the elastic stop portion 29. Under the action of its own elastic restoring force, the elastic stop portion 29 expands outward to disengage from the movement path of the guide needle bracket 50, thereby preventing the elastic stop portion 29 from affecting the retraction of the guide needle bracket 50 when the guide needle bracket 50 moves toward the proximal end 22.

[0068] In one embodiment, if Figure 2 As shown, as described above, the sheath 20 has an annular outer wall 27 and an annular inner wall 28, and the annular outer wall 27 is sleeved on the outer periphery of the annular inner wall 28; the monitor bracket 30 has a mounting portion 34, and the mounting portion 34 is located on the side of the annular inner wall 28 away from the proximal end 22; Figure 2 and Figure 9 As shown, the fitting portion 32, the pushing portion 35, the third abutting portion 33 and the first limiting portion 36 are all connected to the side of the mounting portion 34 away from the distal end 21. Among them, the fitting portion 32, the pushing portion 35 and the third abutting portion 33 are all elastic arm structures, one end of the elastic arm structure is connected to the mounting portion 34, and the other end of the elastic arm structure extends toward the side away from the mounting portion 34 to form a slender arm. The slender structure allows the elastic arm structure to be offset toward the inside or outside relative to the mounting portion 34 to achieve the unlocking function of each process. Before the fitting portion 32 is unlocked, the fitting portion 32, the pushing portion 35 and the third abutting portion 33 are all located on the inside of the annular inner wall 28, the first limiting portion 36 and the first elastic member 40 are located between the annular outer wall 27 and the annular inner wall 28, and the first elastic member 40 abuts against the mounting portion 34. As shown Figure 4 As shown, an elastic stop portion 29 and a first unlocking portion 200 are provided on the annular inner wall 28 .

[0069] In one embodiment, if Figure 2 and Figure 7As shown, the guide needle holder 50 is located on the side of the mounting portion 34 near the proximal end 22 and is located inside the push portion 35, the mating portion 32, and the third abutting portion 33. The second elastic member 60 is located between the mounting portion 34 and the guide needle holder 50. The mounting portion 34 is provided with a through-hole 341 for allowing the guide needle 80 to pass through the mounting portion 34. The side of the mounting portion 34 near the distal end 21 is used to mount the monitor 70.

[0070] like Figure 2 As shown, the movement process and use process of the implant device are as follows: the user removes the cover 90 from the shell 10 and abuts the distal end 21 of the sheath 20 against the part of the human body to be implanted. At this time, it is the initial state. The trigger portion 15 of the shell 10 abuts against the side of the third abutting portion 33 facing the proximal end 22. The second unlocking portion 11 of the shell 10 is spaced apart from the matching portion 32. The fourth abutting portion 12 of the shell 10 is spaced apart from or abuts against the first elastic member 40. Figure 2 In the figure, the fourth abutting portion 12 abuts against the first elastic member 40, the first elastic member 40 abuts against the top wall 26 of the sheath 20, the matching portion 32 is locked with the locking portion 25, and the elastic stop portion 29 of the sheath 20 limits the guide needle bracket 50 on the side of the guide needle bracket 50 close to the proximal end 22. The first elastic member 40 and the second elastic member 60 both have elastic restoring force, and the pushing portion 35 is spaced apart from the second abutting portion 51.

[0071] The user presses the shell 10 toward the distal end 21 of the sheath 20, and the trigger portion 15 pushes the third abutting portion 33 to expand outward, so that the shell 10 can move downward toward the distal end 21. During the downward movement of the shell 10, the fourth abutting portion 12 of the shell 10 first passes through the notch 261 of the sheath 20 and abuts against the first elastic member 40. The shell 10 continues to move downward to compress the first elastic member 40, and the first elastic member 40 is separated from the top wall 26. Then the shell 10 continues to move downward, and the second unlocking portion 11 abuts against the matching portion 32 to unlock the lock between the matching portion 32 and the locking portion 25. The user completes the triggering process.

[0072] After the lock between the fitting portion 32 and the locking portion 25 is released, the monitor bracket 30 moves toward the distal end 21 under the action of the elastic restoring force of the first elastic member 40, and the guide needle bracket 50 maintains its position unchanged under the action of the second elastic member 60 and the elastic stop portion 29 until the monitor bracket 30 moves down to the pushing portion 35 and abuts against the second abutting portion 51, and the monitor bracket 30 drives the guide needle bracket 50 to move down synchronously.

[0073] like Figure 13As shown, when the monitor bracket 30 moves down to the point where the first unlocking portion 200 abuts against the third abutting portion 33, the first unlocking portion 200 pushes the third abutting portion 33 toward the inside, and the third abutting portion 33 drives the pushing portion 35, so that the pushing portion 35 separates from the second abutting portion 51, thereby releasing the position restriction of the monitor bracket 30 on the guide needle bracket 50. At this time, the monitor 70 has been attached to the human body, and the guide needle 80 has assisted the analyte sensor in being implanted in the human body. Under the action of the second elastic member 60, the guide needle bracket 50 moves back toward the proximal end 22, as shown in FIG. Figure 6 As shown, when the guide needle bracket 50 moves to the proximal end 22 of the sheath 20, the guide needle bracket 50 pushes the first abutment portion 252 of the sheath 20, so that the guide needle bracket 50 and the sheath 20 retract synchronously. Finally, as shown in FIG. Figure 12 As shown, the sheath 20 and the guide needle bracket 50 are completely retracted into the housing 10, and the implantation device completes the entire process of the guide needle 80 assisting the analyte sensor to be implanted into the human body and then retracted.

[0074] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art can make several simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. An implantable device for an analyte sensor, characterized in that: include: case; a sheath having a distal end and a proximal end disposed opposite each other, the distal end being configured to contact a portion of a human body to be implanted; the sheath being movably connected to the housing so that the housing can move relative to the sheath toward the distal end; and the sheath having a locking portion; A monitor bracket, the monitor bracket being used to mount a monitor; the monitor bracket having a mating portion, the mating portion being used to lock with the locking portion; the housing being used to abut against the mating portion to release the locking between the mating portion and the locking portion; a first elastic member, the first elastic member being installed between the sheath and the monitor bracket; the housing being configured to abut against the first elastic member before abutting against the mating portion, so that one end of the first elastic member abuts against the housing and the other end of the first elastic member abuts against the monitor bracket; after the mating portion and the locking portion are unlocked, the first elastic member is capable of driving the monitor bracket to move toward the distal end; a guide needle bracket, the guide needle bracket being used to mount the guide needle, and the monitor bracket being able to drive the guide needle bracket to move toward the distal end when moving toward the distal end; And a second elastic member, which is arranged between the monitor bracket and the guide needle bracket. The second elastic member is used to drive the guide needle bracket to move toward the proximal end after the guide needle bracket moves toward the distal end to a preset position; when the guide needle bracket moves toward the proximal end, it can abut against the sheath to promote the synchronous movement of the sheath.

2. The analyte sensor implant device according to claim 1, characterized in that An assembly cavity is provided in the shell, at least part of the sheath is located in the assembly cavity and is slidably connected to the shell, the assembly cavity has an opening on a side close to the distal end, and before the guide needle bracket pushes the sheath to move, the distal end of the sheath is arranged outside the assembly cavity through the opening, or the end face of the distal end of the sheath is flush with the opening; after the guide needle bracket pushes the sheath to move, the sheath can abut the cavity wall of the assembly cavity close to the proximal end, and the distal end of the sheath is located in the assembly cavity.

3. The implantable device of the analyte sensor according to claim 1, characterized in that A sliding channel passing through the sheath is provided in the sheath, and the monitor bracket can slide in the sliding channel; a mounting position is provided in the monitor bracket, and the guide needle bracket is installed in the mounting position; a first abutting portion and a locking portion are provided at the proximal end, and the first abutting portion is provided on the moving path of the guide needle bracket when it moves toward the proximal end, so as to abut against the guide needle bracket.

4. The implantable device of the analyte sensor according to any one of claims 1 to 3, characterized in that: The monitor bracket has a pushing portion, and the guide needle bracket has a second abutting portion. Before the mating portion is unlocked, the second abutting portion is located on the movement path of the pushing portion, and the pushing portion is used to push the second abutting portion when the monitor bracket moves toward the distal end; the sheath has a first unlocking portion, and the first unlocking portion is used to release the stop of the second abutting portion by the pushing portion after the guide needle bracket moves to a preset position.

5. The implantable device of the analyte sensor according to claim 4, characterized in that: The monitor bracket has a third abutment portion, which is connected to the pushing portion in a circumferential direction. The first unlocking portion has a first inclined surface. When the guide needle bracket moves toward the distal end to a preset position, the third abutment portion can abut against the first inclined surface and slide on the first inclined surface. The first inclined surface is used to guide the third abutment portion so that the third abutment portion drives the pushing portion to break away from the movement path of the second abutment portion.

6. The implantable device of the analyte sensor according to claim 4, characterized in that: The sheath has an elastic stop portion; before the pushing portion abuts against the second abutting portion, the pushing portion and the second abutting portion are spaced apart, the elastic stop portion limits the guide needle bracket on a side of the guide needle bracket close to the proximal end, and the second elastic member has an elastic restoring force toward the proximal end; The monitor bracket has a first limiting portion, which is located on the outside of the elastic stop portion before the pushing portion abuts against the second abutting portion to limit the elastic stop portion. The first limiting portion is separated from the elastic stop portion after the pushing portion abuts against the second abutting portion. The elastic stop portion expands outward under the elastic force of the elastic stop portion to break away from the movement path of the guide needle bracket.

7. The implantable device of the analyte sensor according to claim 6, characterized in that: The elastic stopping portion has a second inclined surface, the guide needle bracket has a third inclined surface, and the second inclined surface is used to abut against the third inclined surface to limit the guide needle bracket.

8. The implantable device of the analyte sensor according to claim 6, characterized in that The sheath has an annular outer wall and an annular inner wall, and the annular outer wall is sleeved on the outer circumference of the annular inner wall; the monitor bracket has a mounting portion, and the mounting portion is located on the side of the annular inner wall away from the proximal end; the matching portion, the pushing portion and the first limiting portion are all connected to the side of the mounting portion away from the distal end, and before the matching portion is unlocked, the matching portion and the pushing portion are located on the inner side of the annular inner wall, and the first limiting portion and the first elastic member are located between the annular outer wall and the annular inner wall; the elastic stop portion and the first unlocking portion are provided on the annular inner wall, and the first elastic member abuts against the mounting portion.

9. The implantable device of the analyte sensor according to claim 8, characterized in that The guide needle bracket is located on the side of the mounting portion close to the proximal end, and the guide needle bracket is located on the inner side of the pushing portion and the mating portion; the second elastic member is located between the mounting portion and the guide needle bracket; a through hole is provided on the mounting portion, and the through hole is used for allowing the guide needle to pass through the mounting portion, and the side of the mounting portion close to the distal end is used for installing a monitor.

10. The analyte sensor implant device according to claim 1, characterized in that The proximal end has a top wall, which is located on the side of the first elastic member away from the distal end, and the first elastic member is assembled between the top wall and the monitor bracket; a notch is provided on the top wall passing through the top wall, and the first elastic member is exposed in the notch, and the shell has a fourth abutting portion, and the notch is used for the fourth abutting portion to pass through so that the fourth abutting portion can abut against the first elastic member.

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