CN114027945A

CN114027945A - Reusable needle assisting device and using method thereof

Info

Publication number: CN114027945A
Application number: CN202111135621.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Hangzhou Maili Biotechnology Co ltd
Current assignee: Hangzhou Bolicyto Health Technology Co ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-02-11
Anticipated expiration: 2041-09-27
Also published as: CN114027945B

Abstract

The invention provides a reusable needle assisting device and a using method thereof, wherein a return mechanism capable of enabling a needle assisting device to recover an initial locking state is arranged in the needle assisting device, the return mechanism comprises a needle withdrawing bin, a needle withdrawing bin knob, a trigger assembly reset button and the like, a buckle in the needle assisting device returns to an initial position by pressing the return mechanism, and a needle withdrawing spring is compressed again, so that the needle assisting device can be used for next sensor implantation. By arranging the return mechanism, the needle withdrawing process of the needle assistor is more stable and smooth, the needle implanting and withdrawing operations can be repeatedly carried out for more times, the process of restoring the initial locking state of the needle assistor is more stable and accurate, and the dislocation and clamping phenomena can not be generated in the process of restoring the initial locking state from the unlocking state for more times, so that the needle assistor and the emitter in the needle assistor device can be repeatedly used, and the needle assistor device has a simple structure and is convenient to use.

Description

Reusable needle assisting device and using method thereof

Technical Field

The invention belongs to the field of medical instruments, relates to a human body physiological parameter monitoring device, and particularly relates to a reusable needle assisting device and a using method thereof.

Background

The implanted biosensor has the advantage of continuously measuring some important physiological or pathological parameters, such as oxygen, glucose, lactic acid concentration, etc., which change with time in the body, thereby obtaining a comprehensive and accurate diagnosis or treatment effect. The physiological parameters of the human body are continuously monitored, and the method has important reference significance for diet, health, medication, exercise conditions and the like. In vitro blood glucose self-monitoring is a typical example, but the monitoring effect is greatly reduced because it requires continuous finger pricking to obtain discontinuous test values and requires the user to remember the test values. Continuous blood glucose monitoring utilizes an implanted blood glucose sensor to monitor blood glucose signals, and then data can be sent to receiving equipment through a transmitter, so that all-weather uninterrupted and visual blood glucose monitoring is realized. Physiological parameters such as lactic acid and uric acid can also be monitored by the method.

In order to wear such continuous monitoring devices, it is also necessary to do so by means of a needle booster. Generally, the introducer needle is fitted over the front end of the sensor, and when the needle booster is activated, the introducer needle is synchronized with the sensor and enters the implantation site, and then the introducer needle is rapidly withdrawn, leaving the sensor behind in the subcutaneous tissue. Whether the needle assisting device can work stably and reliably is related to the success of the implantation of the sensor and the experience of a user.

With the increasingly deep research on the needle assistor, the existing needle assistor can realize accurate and stable sensor implantation and needle withdrawal through the precise matching of an internal mechanism, and provides more comfortable use experience for patients as much as possible, so that the price of the needle assistor is further increased. However, most of needle boosters, such as blood sugar detection devices, are basically disposable medical devices to ensure sanitation and sterility, and include a needle booster and an emitter inside the needle booster, which are discarded after use, so that the use cost is high, certain economic pressure is brought to patients, and environmental protection and carbon neutralization are not facilitated.

CN110461217A provides a needle assisting device, which can be used only once, and is discarded after completing one implantation, and there is a situation that the needle withdrawing process after the implantation is easily blocked; CN110720930 provides a needle assisting device, can realize used repeatedly, but its structure is complicated, needs the cooperation of many springs, once used many times, appears the cooperation position inaccurate easily, blocked or the condition of dislocation, is difficult to realize true used repeatedly. Therefore, how to realize the repeated use of the needle assisting device under the condition of ensuring safety and sanitation, thereby reducing cost, having simple structure and convenient use, and being the problem which needs to be solved urgently at present.

Disclosure of Invention

In order to solve the problems, the invention provides a reusable needle assisting device and a using method thereof, wherein a restoring mechanism capable of restoring the needle assisting device from the implantation completion state to the locking state is arranged, the needle assisting device comprises a first restoring mechanism and a second restoring mechanism, a needle withdrawing spring of the needle assisting device is compressed again by pressing the restoring mechanism, and a trigger component returns to the locking position, so that the needle assisting device can be used for the next sensor implantation. By arranging the return mechanism, the process of the needle assister for recovering the locked state is more stable and accurate, and the dislocation and the clamping phenomenon are not generated in the process of recovering the locked state from the implantation finished state more times, so that the needle assister in the needle assister device can be repeatedly used, the needle withdrawing process of the needle assister can be more stable and smooth, the operations of implantation-needle withdrawing-reset-implantation-needle withdrawing-reset more times can be repeatedly performed, the structure is simple, and the use is convenient.

The prior needle booster is in a locked state before being used, so that the needle booster can be conveniently stored and transported and is safer. After the needle assisting device is unlocked, the needle assisting device can enter a working state, and the operation of implanting into the skin can be immediately carried out. By applying force to the needle assist device, the guide needle in the needle assist device assists the sensor in implanting into the skin, and then the guide needle is rapidly withdrawn from the skin. After the implantation is finished once, the needle assisting device is in a working finished state, although the needle assisting device is still in an unlocking state, the needle assisting device cannot return to the working state again to perform implantation operation again, cannot return to a locking state again, and can only be abandoned, so that great waste is generated.

According to the needle assistor provided by the invention, the return mechanism for helping the needle assistor to return to the locking state is arranged in the needle assistor, and the needle assistor can quickly return to the initial locking state by pressing the return mechanism, so that the needle assistor can be repeatedly used for many times, and the cost is saved.

In one aspect, the invention provides a reusable needle assist device comprising a needle assist comprising a first state, a second state and a third state;

the first state is a locking state, at the moment, an elastic element in a cavity containing a sharp object of the needle assisting device is in a compressed state, and a trigger component of the needle assisting device is in a locking position; the second state is a working state, at the moment, the trigger component of the needle booster leaves the locking position, and the elastic element is still in a compressed state; the third state is a work completion state, and the elastic element is in the longest state at the moment;

the needle assistor is also provided with a restoring mechanism, and force is applied to the restoring mechanism to enable the needle assistor to restore from the third state to the first state.

In some forms, the elastic element is in a longest state, meaning that the elastic element returns to a natural state.

In some forms, the elastic element is in its longest possible state and is still compressed, but to a lesser extent, in order to return completely to its natural state.

In some forms, the elastic element may be any element that has inertia and can return to elastic deformation, such as a spring, rubber, etc.

In some forms, the inclusion of a sharp object is a sharp object that aids in the implantation of the sensor into the skin, such as an introducer needle or the like; the cavity containing the sharp object, such as a needle withdrawing bin in a needle assisting device, can be used for accommodating a guide needle.

Further, the restoring mechanism comprises a first restoring mechanism and a second restoring mechanism, and the first restoring mechanism can restore the elastic element in the cavity containing the sharp object from the longest state to the compressed state; the second return mechanism is capable of returning the trigger assembly to the locked position.

Further, the force bearing points of the first restoring mechanism and the second restoring mechanism for exerting force can respectively extend out of the shell from different openings of the shell of the needle booster; the stress point of the first restoring mechanism is positioned at the opening at the top end of the shell, the stress point of the second restoring mechanism is positioned at the elongated opening at the side edge of the shell, and the stress point of the second restoring mechanism can slide along the elongated opening.

In some modes, when the needle assisting device is in the first state and the second state, the stress point of the first restoring mechanism is located in the shell, and the stress point of the second restoring mechanism is located at the lowest point of the elongated opening and cannot be pressed.

In some embodiments, the force point of the first restoring mechanism is located on one side of the top end of the housing, but not in the middle of the top end, because the first restoring mechanism is located entirely off-center of the needle assisting device, and thus the force point of the first restoring mechanism also extends from one side of the top end of the housing.

In some embodiments, after the needle assist device is in the second state, the implantation is completed by pressing the housing, thereby bringing the needle assist device into the third state.

In some modes, when the needle assisting device is in the third state, the stress point of the first restoring mechanism extends out of the shell from the opening of the shell, and the stress point of the second restoring mechanism also rises to the highest point of the elongated opening.

Further, the first recovery mechanism comprises a sharp object containing cavity and a motion track thereof, and after a force is applied to a force-bearing point of the first recovery mechanism, the sharp object containing cavity is recovered to a lowest position along the motion track, wherein the lowest position is that the sharp object containing cavity is directly combined with the emitter base of the needle assisting device, so that the elastic element inside the sharp object containing cavity is compressed.

Furthermore, the sharp object containing cavity comprises a needle withdrawing bin and a needle withdrawing bin cover, the needle withdrawing bin cover is detachably connected with the needle withdrawing bin, and the outer wall of the needle withdrawing bin is provided with a positioning rib; the movement track is provided by locating plates in the shell, and the movement track is formed between adjacent locating plates.

In some modes, the needle withdrawing bin cover can be in screw connection with the needle withdrawing bin by using a needle withdrawing bin knob.

In some forms, the sharp is an introducer needle for implantation.

In some embodiments, after implantation, the needle withdrawal compartment knob can be rotated to separate the needle withdrawal compartment from the needle withdrawal compartment, the guide needle can be removed from the needle withdrawal compartment, and the needle withdrawal compartment knob can be tightened to combine the needle withdrawal compartment with the needle withdrawal compartment for subsequent use.

Furthermore, when the needle withdrawing bin and the trigger assembly are arranged in the shell, the positioning sheet can extend into the trigger assembly and is matched with the positioning convex edge of the needle withdrawing bin, so that the needle withdrawing bin moves along the direction of the moving track; the middle of each positioning plate is also provided with a gap.

In some modes, the outer wall of the needle withdrawing bin is provided with three positioning convex edges, the shell is provided with three positioning pieces, and the middle of each positioning piece is provided with a notch.

Furthermore, the stress point of the first return mechanism is positioned on the needle withdrawing bin cover, and the stress point of the second return mechanism is positioned on the reset button on the trigger assembly; the second return mechanism comprises a trigger assembly and a reset button on the trigger assembly.

Furthermore, the cavity containing the sharp object is directly combined with the emitter base of the needle booster, namely, the needle withdrawing bin is fixed by the claws of the emitter base again; the elastic element is a needle withdrawing spring which is positioned in the needle withdrawing bin, and when the needle withdrawing bin is fixed by the clamping jaws, the needle withdrawing spring is compressed.

Furthermore, the trigger assembly is provided with a trigger piece and a buckle, and after force is applied to a stress point of the second return mechanism, the trigger assembly returns to a locking position, namely: the trigger tab is again blocked by the initial stop mechanism of the transmitter base, disabling the displacement of the trigger assembly, while the latch is retracted back to the initial position of the locking tab in the housing.

Furthermore, a locking piece in the shell can be matched with a buckle on the trigger component, two tooth-shaped concave positions are arranged on the locking piece, wherein the tooth-shaped concave position at the most proximal end is an initial position, the second tooth-shaped concave position is an unlocking position, and when the buckle is positioned at the initial position, the needle assisting device is in a first state; when the buckle is positioned at the unlocking position, the needle assisting device is in a second state; when the buckle leaves the unlocking position and continues to slide along the locking piece to the farthest end, the needle assisting device is in a third state; the other parts of the locking piece are in a linear structure after the initial position and the unlocking position are removed.

The far end of the invention refers to the direction far away from the skin, and the near end refers to the direction close to the skin.

Furthermore, a limiting piece is further arranged in the shell, the trigger assembly can slide along the direction of the limiting piece, and a final position bump for stopping the trigger assembly from sliding continuously is arranged at the end part of the limiting piece.

Further, the second state also comprises an implantation starting state and an implantation whole process state; the whole implantation process state comprises the whole process that the guide needle assists the sensor to be implanted into the skin, and then the guide needle rapidly retreats and withdraws.

In another aspect, the present invention provides a method for implanting a sensor using the needle assisting device as described above, mainly comprising the steps of:

(1) the needle withdrawing bin cover is pressed to the bottom, and the reset button of the trigger assembly is pulled down to enable the needle assisting device to return to the first state;

(2) triggering the needle assisting device to enter a second state;

(3) completing the implantation operation, and enabling the needle assisting device to enter a third state;

(4) and pressing the needle withdrawing bin cover to the bottom again, and pulling down a reset button of the trigger assembly to enable the needle assisting device to return to the first state to wait for the next implantation operation.

The arrangement of the positioning sheet in the shell and the arrangement of the positioning convex edge on the outer wall of the needle withdrawing bin provide a needle withdrawing slideway for the needle withdrawing bin, can prevent the circumferential movement of the needle withdrawing bin, ensures that the needle withdrawing process of the needle assistor is more stable and smoother, and can carry out implantation and needle withdrawing operations for more times; simultaneously also make the cooperation of withdrawing the needle storehouse and triggering the subassembly more accurate, press and withdraw needle storehouse knob and drop-down and trigger the subassembly and reset the button and make the process that helps needle ware to resume the locking condition more stable, accurate, guarantee that the buckle that triggers the subassembly can both be in exact position at every turn, guarantee can not produce dislocation and screens phenomenon from the third state to the in-process that resumes the first state more.

The opening that sets up in the spacer simultaneously, can help the jack catch to open, it is fixed by the jack catch not to make to move back the needle storehouse, move back the needle rapidly under the effect of spring, prevent that the needle process of moving back from appearing blocked, be difficult to the condition of moving back the needle, it is more accurate to further urge the cooperation of advancing and retreating the needle storehouse and trigger assembly, it is more stable to press down needle storehouse knob and pull down the process that trigger assembly reset button made to help the needle ware to resume lock condition, it is accurate, guarantee that trigger assembly's buckle can both be in the exact position at every turn, guarantee the needle process of moving back at the many times, and can not produce dislocation and screens phenomenon from the third state to the in-process of resuming first state.

The locking piece in the shell is removed from the initial position and the unlocking position, and other parts are of linear structures, so that the needle assisting device is smoother when sliding from the second state to the third state, the phenomenon that the trigger assembly is clamped cannot occur, and the needle assisting device is smoother when being restored from the third state to the first state more easily.

The invention has the following beneficial effects:

1. the process that the needle assistor returns to the first state (locking state) from the third state (implantation completion state) is more stable and accurate, and dislocation and clamping phenomena cannot be generated in the process that the needle assistor returns to the first state from the third state more times;

2. meanwhile, the needle assisting device is more stable and smoother in the process of implanting and withdrawing the needle from the second state to the third state, and the operation of implanting and withdrawing the needle can be repeatedly carried out for more times;

3. the needle assisting device can be reused.

Drawings

FIG. 1 is a schematic view of the overall structure of a needle assisting device provided in example 1;

FIG. 2 is an exploded view of the needle assisting device provided in example 1;

FIG. 3 is a schematic structural view of the needle assisting device provided in embodiment 1;

FIG. 4 is an exploded view of the inner structure of the needle assisting device provided in example 1;

fig. 5 is a schematic structural view of the housing provided in embodiment 1;

fig. 6 is a schematic structural view of the needle withdrawing magazine provided in embodiment 1;

fig. 7 is a schematic internal structural diagram of the trigger assembly provided in embodiment 1;

fig. 8 is an external structural schematic diagram of the trigger assembly provided in embodiment 1;

fig. 9 is a schematic top view of the emitter base according to embodiment 1;

FIG. 10 is a schematic view showing the lower structure of the transmitter base provided in example 1;

fig. 11 is a schematic structural view of a base provided in embodiment 1;

FIG. 12 is a schematic sectional view of the needle assisting device according to embodiment 2, taken along the whole process from the third state to the first state, and then from the second state to the third state;

FIG. 13 is a sectional view of the needle assisting device provided in embodiment 2 in a third state, in which the needle assisting device has been implanted and the guide needle has been retracted into the needle retracting magazine;

FIG. 14 is a sectional view of the needle holder according to embodiment 2 in a first state in which the needle withdrawal knob is opened to withdraw the introducer needle, and the needle holder holds the emitter in the initial state;

FIG. 15 is a cross-section of a needle assist device provided in example 2 in a second state, prior to start of implantation, wherein the needle assist device grips the emitter and sensor assembly;

FIG. 16 is a sectional view of the needle assisting device provided in example 2, showing the state of the implantation process in a second state, in which the needle assisting device holds the emitter and the sensor assembly, and then the needle is retracted after being implanted against the skin;

fig. 17 is a schematic cross-sectional view of the trigger assembly provided in embodiment 2, taken at different positions and latched in different states;

fig. 18 is a schematic view of the trigger piece of the trigger assembly provided in embodiment 2 blocking and locking with the initial limit mechanism on the transmitter base.

Detailed Description

In the following, preferred embodiments of the invention are described in further detail with reference to the accompanying drawings, it being noted that the following embodiments are intended to facilitate the understanding of the invention without limiting it in any way, and that all features disclosed in the embodiments of the invention, or all steps of the disclosed methods or processes, may be combined in any way, except for mutually exclusive features and/or steps.

EXAMPLE 1 needle assist device provided by the invention

Fig. 1 to 11 show a needle assisting device provided in this embodiment, where fig. 1 is a schematic diagram of an overall structure of the needle assisting device, fig. 2 is an exploded diagram of the needle assisting device, fig. 3 is a schematic diagram of a structure of the needle assisting device, fig. 4 is an exploded diagram of an internal structure of the needle assisting device, fig. 5 is a schematic diagram of a structure of a housing, fig. 6 is a schematic diagram of a structure of a needle withdrawing bin, fig. 7 is a schematic diagram of an internal structure of a trigger assembly, fig. 8 is a schematic diagram of an external structure of the trigger assembly, fig. 9 is a schematic diagram of an upper structure of a transmitter base, fig. 10 is a schematic diagram of a lower structure of the transmitter base, and fig. 11 is a schematic diagram of a structure of the base.

As shown in fig. 1 and fig. 2, the reusable needle assisting device 1 provided in this embodiment is composed of a needle assisting device 2 for implanting a sensor and a base 3 for carrying an introducer needle 50 and a sensor assembly 51, and a restoring mechanism 4 for restoring the needle assisting device 2 from the third state to the first state is provided inside the needle assisting device, and includes a first restoring mechanism 401 and a second restoring mechanism 402. By pressing the return mechanism 4, the needle assisting device 2 can be quickly restored to the initial locking state, so that the needle assisting device can be repeatedly used for many times, and the cost is saved. Before use, the needle aid 2 and the base 3 are separately packaged, the base 3 containing the guide needle 50 and the sensor assembly 51 is sterilized and hermetically packaged, and the needle aid 2 is not sterilized.

Preferably, the first return mechanism 401 comprises a needle withdrawing magazine 5, a needle withdrawing magazine knob 6 (corresponding to a needle withdrawing magazine cover) and a needle withdrawing magazine slide 17 provided by a positioning piece 16 on the housing 8; the second return mechanism comprises a trigger assembly 9 and a reset button 7 on the trigger assembly 9.

Preferably, as shown in fig. 3 and 4, the needle assisting device 2 is formed by sequentially assembling the housing 8, the trigger assembly 9, the needle withdrawing bin 5, the needle withdrawing spring 22 and the emitter base 10 into a whole from top to bottom; the upper end of the needle withdrawing bin 5 is provided with a threaded opening 11 matched with the needle withdrawing bin knob 6, and the needle withdrawing bin knob 6 can be matched with the threaded opening 11 to be screwed tightly; the upper end of the trigger component 9 is provided with a cavity 12 matched with the reset button 7 of the trigger component 9, and the reset button 7 can be at least partially arranged in the cavity 12; the needle withdrawing bin knob 6 and the reset knob 7 can respectively extend out of the shell 8 from different openings on the shell 8 to enable the needle booster to restore the locking state. The top of the shell 8 is provided with a circular arc-shaped opening 13 for the needle withdrawing bin knob 6 to extend out of the shell 8, and the side edge of the shell 8 is provided with a strip-shaped opening 14 for the reset button 7 of the trigger assembly 9 to extend out of the shell 8. The needle withdrawal compartment knob 6 is not located in the middle of the top end of the housing 8 from the side of the top end of the housing 8, because the first restoring means 401 is located entirely off-center of the needle aid 2 and not in the middle, and therefore the needle withdrawal compartment knob 6 also protrudes from the side of the top end of the housing 8.

Preferably, as shown in fig. 6, the outer wall of the needle withdrawing bin 5 is provided with a positioning convex rib 15; as shown in fig. 5, a positioning piece 16 is provided in the housing 8; when the needle withdrawing bin 5 and the trigger component 9 are installed in the shell 8, the positioning sheet 16 can extend into the trigger component 9 and be matched with the positioning convex rib 15 of the needle withdrawing bin 5, so that the circumferential rotation of the needle withdrawing bin 5 is limited. The number of the positioning sheets 16 corresponds to the number of the positioning ribs 15 of the needle withdrawing bin 5, and the plurality of positioning sheets 16 are encircled into a cylindrical shape. In the shell 8, a needle withdrawing bin slideway 17 is arranged between adjacent positioning sheets 16 and can be matched with a positioning rib 15 of the needle withdrawing bin 5 for the needle withdrawing bin slideway 17 to slide; still be equipped with the opening 18 in the spacer 16, be used for helping the jack catch 26 to open, it is not fixed by jack catch 26 to make to move back needle storehouse 5, move back the needle rapidly under the effect of needle withdrawal spring 22, prevent that the needle withdrawal process from appearing being blocked, be difficult to the condition of moving back the needle, it is more accurate also to make the cooperation of moving back needle storehouse 5 and trigger component 9 simultaneously, it is more stable with the process that drop-down reset button 7 made to help needle ware 2 to resume lock state to press to move back needle storehouse knob 6, it is accurate, guarantee that the buckle 40 of trigger component 9 can both be in the exact position at every turn, guarantee can not produce dislocation and screens phenomenon from the third state to the in-process of resuming first state more.

The positioning piece 16 is arranged on the shell 8, and the positioning piece 16 extends into the trigger assembly 9 and is matched with the positioning convex rib 15 of the needle withdrawing bin 5, so that a needle withdrawing bin slide way 17 is provided for the needle withdrawing bin 5. By arranging the needle withdrawing bin 5 and providing the positioning convex edges 15 and the positioning sheets 16 of the needle withdrawing bin slide ways 17, the needle withdrawing process of the needle assistor 2 is more stable and smooth, and more times of implantation and needle withdrawing operations can be carried out; meanwhile, the needle withdrawing bin 5 and the trigger assembly 9 are more accurately matched, the process of recovering the locking state of the needle assisting device 2 is more stable and accurate by pressing the needle withdrawing bin knob 6 and the pull-down reset button 7, the buckle 40 of the trigger assembly 9 is guaranteed to be positioned at the correct position every time, and dislocation and clamping phenomena can not occur from the third state to the first state at more times.

Preferably, the needle withdrawing cartridge 5 further comprises a needle holder 19, a cartridge 20, a baffle 21 and a needle withdrawing spring 22; needle holder 19 is located at the lower side inside cartridge 20 for holding guide needle 50; the end part 23 of the needle holder is tightened, so that the guide needle 50 can not fall off and can only move in the direction away from the skin; the tail part 24 of the needle holder is arranged on the baffle 21 in the bin 20; the needle withdrawing spring 22 has one end connected to the emitter base 10 and the other end connected to the baffle 21 inside the cartridge 20. The tail of the guide needle 50 is sleeved with the rubber cover 52, so that the tail size is increased, after the rubber cover 52 at the tail of the guide needle 50 enters the needle holder 19 under certain pressure, the guide needle 50 can be firmly gripped by the end part 23 of the needle holder, cannot fall off in the direction close to the skin, and can only be displaced in the direction far away from the skin, so that after the guide needle 50 penetrates the skin, the guide needle can be rapidly withdrawn from the end part 23 of the needle holder in the direction far away from the skin under the inertia effect of the needle withdrawing spring 22.

Preferably, as shown in fig. 8 and 9, the emitter base 10 is provided with a claw 26, a needle passing through hole 27, an initial limit mechanism 28 and a positioning boss 55; the needle withdrawing spring 22 and the needle withdrawing bin 5 can be sleeved on the needle passing through hole 27, and specifically should be positioned outside the needle passing through hole 27, wrap the needle passing through hole 27 and then be arranged in the clamping jaws 26; the clamping jaws 26 are surrounded by a plurality of clamping jaws, the number of the clamping jaws 26 is 3 in the embodiment, a bump 29 is arranged at the end part of each clamping jaw 26, and the notch 18 in the positioning piece 16 can be used for limiting the bump 29 of the clamping jaw 26 and preventing the clamping jaw 26 from continuously moving away from the skin; the initial limiting mechanism 28 is positioned at the periphery of the emitter base 10 and is used for enabling the needle booster 2 to be in an initial locking state; the emitter 31 is clamped below the emitter base 10 by means of elastic clamping fasteners 30. As shown in fig. 2, the transmitter 31 includes a transmitter upper cover 32 and a transmitter lower cover 33, in which a circuit board is mounted; the emitter lower cover 33 is provided with a space for accommodating the guide needle 50 and the sensor suite 51 in advance, and the base 3 is provided with a sensor groove 25 for bearing the guide needle 50 and the sensor suite 51; during unlocking of the needle assisting device 2, the base 3 can push the guide needle 50 and the sensor set 51 upwards, so that the guide needle 50, the sensor set 51 and the emitter 31 are assembled together; after the detection is completed, the sensor kit 51 is taken out, and the emitter 31 can be recycled. The lower cover 33 of the emitter may contain a double-sided adhesive tape to help the emitter 31 adhere to the skin after emission. The transmitter upper cover 32 is provided with a guide pin through hole 53 and an alignment groove 54, and the alignment groove 54 can be matched with a positioning boss 55 of the transmitter base 10, so as to confirm the position of the transmitter 31 when being combined with the transmitter base 10.

In order to make the emitter 31 recyclable, a battery is required to be installed in the sensor set 51, and since the battery occupies a certain space, the introducer needle 50 and the sensor set 51 are required to be arranged at an eccentric position of the needle assistor 2, but not in the middle, so that the first recovery mechanism 401 is integrally arranged at the eccentric position of the needle assistor 2, and the needle withdrawal bin knob 6 also extends out from one side of the top end of the housing 8.

Preferably, as shown in fig. 7 and 8, the trigger assembly 9 comprises a jaw-defining cavity 35 and a sleeve 36; the jaw-defining cavity 35 may be used to define the jaws 26 inwardly toward each other; the bottom of the jaw limiting cavity 35 is provided with an inward-concave jaw limiting groove 37 corresponding to each jaw 26; the top of the claw limiting cavity 35 is provided with a needle withdrawing bin limiting block 38 which protrudes outwards and is used for limiting the needle withdrawing bin 5 to continuously move towards the direction far away from the skin; the sleeve 36 is provided with a trigger sheet 39, a buckle 40 and a limit groove 41; the triggering pieces 39 are more than one tongue piece with one end fixed and arranged around the wall of the sleeve 36, in the embodiment, the number of the triggering pieces 39 is 3, and when the upper end of the triggering piece 39 is abutted against the initial limiting mechanism 28 of the emitter base 10, the needle assisting device 2 is in an initial locking state; the buckles 40 are circumferentially arranged around the top of the sleeve 36, the number of the buckles is more than one, and the number of the buckles 40 in the embodiment is 3; the limiting grooves 41 are hollow grooves located on the wall of the sleeve 36, and are arranged around the wall of the sleeve 36, and the number of the limiting grooves 41 is more than one, and in this embodiment, the number of the limiting grooves 41 is also 3. The jaw-defining chamber 35 may be used to define the jaws 26 moving inwardly together, thereby holding the needle withdrawal magazine 5 by the projections 29 at the ends of the jaws 26 and placing the needle withdrawal spring 22 in compression; when the claw 26 slides downwards to the claw limiting groove 37, the claw 26 becomes loose because the claw limiting groove 37 is inwards sunken, and the lug 29 at the end part of the claw is difficult to fix the needle withdrawing bin 5, so that the needle withdrawing bin 5 is separated from the claw 26 under the action of the needle withdrawing spring 22.

Preferably, as shown in fig. 5, a limiting piece 42 and a locking piece 43 are further arranged in the housing 8; the limiting sheet 42 can be matched with the limiting groove 41 on the trigger component 9 for positioning the trigger component 9, the trigger component 9 can slide along the direction of the limiting sheet 42 and cannot rotate circumferentially, and the end part of the limiting sheet 42 is provided with a final-position lug 44; the locking piece 43 can be matched with the buckle 40 on the trigger component 9, and two tooth-shaped concave positions are arranged on the locking piece 43, wherein the most proximal tooth-shaped concave position is an initial position 45, and the second is an unlocking position 46. The locking piece 43 in the housing 8 is provided with the initial position 45 and the unlocking position 46, and other parts are linear structures, so that the needle assistor 2 can slide from the second state to the third state more smoothly, the phenomenon that the trigger assembly 9 is clamped cannot occur, and the needle assistor 2 can return from the third state to the first state more easily and more smoothly.

Preferably, the base 3 can be used for carrying the guiding needle 50 and the sensor set 51, and can also be used for pushing the trigger piece 39 of the trigger assembly 9 away from the initial limiting mechanism 28, so that the buckle 40 of the trigger assembly 9 enters the unlocking position 46 from the initial position 45, and the needle assisting device 2 enters the unlocking state from the initial locking state. When the buckle 40 is located at the initial position 45, the needle assisting device 2 is in a first state (a locking state); when the buckle 40 is pushed to the unlocking position 46, the needle assisting device 2 is unlocked to enter a second state; when the buckle 40 passes over the unlocking position 46 and reaches the starting critical position 47, the needle assisting device 2 starts the implantation process until the implantation is completed, and after the guide needle 50 is withdrawn, the needle assisting device 2 enters a third state.

The method for implanting the sensor by using the needle assisting device 1 provided by the embodiment mainly comprises the following steps:

(1) the needle withdrawing bin knob 6 is pressed to the bottom, and the reset button 7 of the trigger assembly 9 is pulled down, so that the needle assisting device 2 returns to the first state;

(2) placing a guide needle 50 and a sensor kit 51 on the base, and performing sterilization treatment;

(3) inserting the needle assisting device 2 into the base 3, enabling the needle assisting device 2 to enter a second state from a first state, and enabling the guide needle 50 and the sensor suite 51 on the base 3 to enter the lower cover 33 of the emitter;

(4) taking down the needle assisting device 2, placing the needle assisting device on the skin to be implanted, pressing down the shell, implanting the sensor into the skin with the help of the guide needle 50, withdrawing the guide needle 50, completing the implantation operation, and enabling the needle assisting device 2 to enter a third state;

(5) the needle withdrawing cabin knob 6 is pressed to the bottom again, and the reset button 7 of the trigger assembly 9 is pulled down, so that the needle assisting device 2 is returned to the first state to wait for the next implantation operation.

EXAMPLE 2 Process for restoring a needle Assist device provided by the present invention from a third State to a first State

The specific structure of the needle assistor 2 provided in this embodiment is as shown in embodiment 1, the needle assistor 2 has three states, which are a first state, a second state and a third state, wherein a cross-sectional view of the whole process that the needle assistor 2 goes from the third state to the first state and then goes through the second state to the third state is shown in fig. 12, a cross-sectional view of the third state of the needle assistor 2 is shown in fig. 13, a cross-sectional view of the first state of the needle assistor 2 is shown in fig. 14, a cross-sectional view of the state before implantation start in the second state of the needle assistor 2 is shown in fig. 15, a cross-sectional view of the implantation process state in the second state of the needle assistor 2 is shown in fig. 16, and a cross-sectional view of different positions of the buckle 40 of the trigger assembly 9 in different states is shown in fig. 17.

As shown in fig. 12, the needle assisting device 2 comprises a first state, a second state and a third state; the first state is a locking state, the needle withdrawing spring 22 is in a compressed state, and the trigger component 9 of the needle assisting device 2 is in a locking position; the second state is a working state, at this time, the trigger assembly 9 leaves the locking position, and the needle withdrawing spring 22 is still in a compressed state; the third state is a work completed state in which the needle withdrawing spring 22 is in the longest state.

Preferably, the second state further comprises a pre-implantation initiation state (bottom right of fig. 12) and a full implantation procedure state (bottom left of fig. 12). The whole implantation process state comprises the whole process that the guide needle 50 assists the sensor to be implanted into the skin, and then the guide needle 50 rapidly retreats and withdraws.

Referring to FIG. 13, the needle assisting device 2 is provided with a restoring mechanism 4, and a force is applied to the restoring mechanism 4 to restore the needle assisting device from the third state to the first state, including a first restoring mechanism 401 and a second restoring mechanism 402. The first restoring mechanism 401 is capable of restoring the elastic element (in this embodiment, the needle-withdrawing spring 22) in the chamber 405 containing the sharp object from the longest state to the compressed state; the second return mechanism 402 enables the trigger assembly 9 to return to the locked position.

As shown in fig. 13 and 14, the force application points 403 and 404 of the first restoring mechanism 401 and the second restoring mechanism 402 can respectively extend out of the housing 8 from different openings of the housing 8; the force point 403 of the first restoring mechanism 401 is located at the top opening 13 of the housing 8, the force point 404 of the second restoring mechanism 402 is located at the elongated opening 14 of the side of the housing 8, and the force point 404 of the second restoring mechanism 402 can slide along the elongated opening 14. When the needle assister 2 is in the first state and the second state, the force point 403 of the first restoring mechanism 401 is located inside the housing 8, and the force point 404 of the second restoring mechanism 402 is located at the lowest point of the elongated opening 14 and cannot be pressed, so that when the needle assister 2 is in the second state, the housing 8 (and the first restoring mechanism 401 and the second restoring mechanism 402 cannot be pressed) needs to be pressed to complete implantation, thereby entering the third state; when the needle assisting device is in the third state, the force bearing point 403 of the first restoring mechanism 401 extends out of the housing 8 from the opening of the housing 8, and at this time, the force bearing point 404 of the second restoring mechanism 402 also rises to the highest point of the elongated opening 14.

Preferably, the first restoring mechanism 401 comprises a sharp object containing cavity 405 and its moving track (in this embodiment, the needle withdrawing carriage 17), and when a force is applied to the force applying point 403 of the first restoring mechanism 401, the sharp object containing cavity 405 is restored to the lowest position (i.e. the position closest to the skin) along the needle withdrawing carriage 17, and the sharp object containing cavity 405 is engaged with the transmitter base 10 again, so that the needle withdrawing spring 22 inside the sharp object containing cavity 405 is compressed.

Preferably, the chamber 405 containing the sharp objects comprises a needle withdrawing bin 5 and a needle withdrawing bin knob 6, the needle withdrawing bin knob 6 is detachably connected with the needle withdrawing bin 5 in a spiral manner, and the outer wall of the needle withdrawing bin 5 is provided with a positioning rib 15 (fig. 6); the needle withdrawal compartment slide 17 is provided by positioning pieces 16 (fig. 5) in the housing 8, and the needle withdrawal compartment slide 17 is formed between adjacent positioning pieces 16. The sharp object in this embodiment is an introducer needle 50 for implantation. After implantation, the needle withdrawal bin knob 6 is rotated to separate the needle withdrawal bin 5 from the needle withdrawal bin 6, the guide needle 50 is poured out of the needle withdrawal bin 5, and the needle withdrawal bin knob 6 is screwed to be combined with the needle withdrawal bin 5 for the next use.

Preferably, when the needle withdrawing bin 5 and the trigger assembly 9 are installed in the housing 8, the positioning piece 16 can extend into the interior of the trigger assembly 9 and cooperate with the positioning rib 15 of the needle withdrawing bin 5, so that the needle withdrawing bin 5 can move according to the needle withdrawing bin slide way 17.

Preferably, the force point 403 of the first return mechanism 401 is located on the needle withdrawal knob 6, and the force point 404 of the second return mechanism 402 is located on the reset button 7 on the trigger assembly 9; the second return mechanism 402 includes a trigger assembly 9 and a reset button 7 on the trigger assembly 9.

Preferably, the chamber 405 containing the sharp object is directly combined with the emitter base 10, that is, the needle withdrawing bin 5 is fixed by the claws 26 of the emitter base 10 again; the needle withdrawing spring 22 is positioned in the needle withdrawing bin 5, and when the needle withdrawing bin 5 is fixed by the clamping jaws 26, the needle withdrawing spring 22 is compressed.

Preferably, the trigger assembly 9 is provided with a trigger piece 39 and a buckle 40, and after a force is applied to the force-bearing point 404 of the second return mechanism 402, the return of the trigger assembly 9 to the locking position means that: the trigger tab 39 is again stopped by the initial stop 28 of the launcher base 10, disabling the displacement of the trigger assembly 9, while the catch 40 is again retracted to the initial position 45 of the locking tab 43 in the housing 8.

Preferably, as shown in fig. 17, a locking piece 43 in the housing 8 is capable of cooperating with the catch 40 on the trigger assembly 9, the locking piece 43 is provided with two tooth-like recessed positions, wherein the tooth-like recessed position at the most proximal end is an initial position 45, and the second is an unlocked position 46, and when the catch 40 is located at the initial position 45, the needle assisting device 5 is in the first state; when the buckle 40 is located at the unlocking position 46, the needle assisting device 2 is in a second state before implantation starting; when the buckle 40 leaves the unlocking position 46 and crosses the critical position 47, the needle assisting device 2 enters the implantation process state of the second state; when the catch 40 continues to slide along the locking tab 43 to the most distal end, the needle assisting device 2 is in the third state.

Preferably, a limiting piece 42 is further disposed in the housing 8, the trigger assembly 9 can slide along the direction of the limiting piece 42, and a final position bump 44 for stopping the trigger assembly 9 from sliding continuously is disposed at an end of the limiting piece 42.

As shown in fig. 13, when the needle assisting device 2 is in the third state, which is the implantation completed state, the needle withdrawing spring 22 is in the longest state (the longest state here does not necessarily mean that the needle withdrawing spring 22 is completely restored to the natural state, and the needle withdrawing spring 22 may be in the natural state or may still be in the compressed state, and only the degree of compression is lighter than that of other times); the needle withdrawing bin 5 is separated from the clamping jaw 26, is positioned at the farthest end of the needle withdrawing bin slideway 17 and is blocked by a needle withdrawing bin limiting block 38 of the trigger component 9; the retaining groove 41 (fig. 8) of the trigger assembly 9 slides along the retaining piece 42 (fig. 5) to the far end, and is stopped by the final position projection 44 at the end of the retaining piece 42. The needle withdrawing bin knob 6 extends out of the shell 8 from the circular arc opening 13 of the shell 8, and the reset button 7 of the trigger assembly 9 is positioned at the uppermost end of the side edge of the shell 8 provided with the long strip-shaped opening 14. At this time, the needle withdrawing cabin knob 6 is pressed down, and the trigger assembly reset button 7 is pulled down, so that the needle assisting device 2 is returned to the first state (fig. 14), and then the next implantation operation can be performed. At the moment, the needle withdrawing spring 22 is compressed again, the needle withdrawing bin 5 withdraws along the needle withdrawing bin slide way 17 and is fixed by the emitter clamping jaws 26 again; the trigger assembly 9 is retracted along the retention tab 42 and extends the longest distance 406 out of the housing 8, and the catch 40 returns to the home position 45 (fig. 17), with each trigger tab 39 again being blocked by the home retention mechanism 28 (fig. 18).

In the locking process of returning to the first state from the third state, the needle withdrawing cabin knob 6 is pressed to the bottom, when the trigger piece 39 is blocked by the initial limiting mechanism 28 of the emitter base 10, the trigger piece cannot go down continuously, at the moment, the trigger piece is just right to the initial position, the trigger piece is in the locking state, the initial position 45 and the unlocking position 46 are both inclined planes, the buckle 40 is thin, the initial position 45 and the unlocking position 46 of the locking piece 43 and the critical position 47 are easy to move, and the phenomenon that the buckle 40 is blocked and fixed only by the unlocking position 46 in the process of returning to the first state cannot occur.

The needle assistor 2 in the first state needs to be unlocked to enter the pre-implantation start state (fig. 15) in the second state with the help of the base 3, and the implantation operation can be performed only by placing the needle assistor 2 on the base 3, and aligning the bottom of the needle assistor 2 with the corresponding position of the base 3, for example, a foolproof groove 48 is arranged below the sleeve 36 of the trigger assembly 9 of the needle assistor 2, and a foolproof block 49 (fig. 11) corresponding to the foolproof groove 48 is arranged on the base 3, so that the bottom of the needle assistor 2 and the base 3 are aligned to determine the position through the foolproof groove 48 and the foolproof block 49 in the matching unlocking process. After aligning, the needle assisting device 2 is pressed down, the base 3 forces each trigger piece 39 of the trigger assembly 9 to leave the initial limiting mechanism 28 at the same time, the buckle 40 is pushed from the initial position 45 to the unlocking position 46, so that the needle assisting device 2 enters the unlocking state, and the guide needle 50 and the sensor assembly 51 which are arranged on the base 3 are also pressed into the emitter lower cover 33 in the needle assisting device 2 and assembled with the emitter 31, wherein the needle-shaped flexible sensor in the sensor assembly 50 is exposed below the emitter lower cover. Since the unlocking is performed by the base 3, the unlocking degree is controlled by the depth of the groove in the base 3, and when the trigger piece 39 is pressed, the trigger piece is pushed open, but since the moving distance is limited by the depth of the groove in the base 3, the buckle 40 is only pushed to the unlocking position 45 from the initial position 45, and cannot directly go over the unlocking position 45 to continue upward.

Fig. 15 shows a schematic diagram of a state before implantation start in the second state of the needle assister 2, and fig. 16 shows a schematic diagram of a state of an implantation process in the second state of the needle assister 2.

At this time, only the skin position of the sensor to be implanted is aligned, the housing 8 of the needle assisting device 2 is pressed, the housing 8 descends, the locking piece 43 in the housing 8 descends, the buckle 40 of the trigger assembly moves from the unlocking position 46 to the starting critical position 47, once the starting critical position 47 is exceeded, the implantation process is started, the needle-shaped flexible sensor is rapidly implanted into the skin along with the guide needle 50, then the trigger assembly 9 moves further away from the skin, when the claw limiting groove 37 contacts the emitter claw 26, the emitter claw 26 loses the fixation of the claw limiting cavity 35, the needle withdrawing bin 5 is separated from the limitation of the emitter claw 26 under the action of the needle withdrawing spring 22 and moves towards the direction away from the skin along the needle withdrawing bin slideway 17, and the needle holder 19 is prompted to rapidly withdraw the guide needle 50 from the skin. With the further release of the force of the needle withdrawing spring 22, the needle withdrawing bin 5 continues to move away from the skin until the needle withdrawing bin stop block 38 is hit, and the trigger assembly 9 reaches the final position and is stopped by being blocked by the final position bump 44. FIG. 15 is a cross-sectional view of the needle withdrawn following the needle booster holding the emitter and sensor assembly 51 in combination, implanted against the skin; fig. 16 is a cross-sectional view of the needle holder holding emitter 31 and sensor combination in the final position after implantation and the guided needle is retracted into the needle withdrawal compartment. At this time, the sensor front end has been implanted into the skin, and the transmitter 31 has also been adhered to the skin by the double-sided adhesive tape. At this time, the needle withdrawing bin knob 6 is rotated to be separated from the needle withdrawing bin 5, the guide needle 50 is poured out from the needle withdrawing bin 5, and then the needle withdrawing bin knob 6 is screwed to be combined with the needle withdrawing bin 5 for the next use.

After the implantation is completed, the needle assisting device 2 is still in the unlocked state, and the needle withdrawing spring 22 is in the longest state (the longest state herein does not necessarily mean that the needle withdrawing spring 22 is completely restored to the natural state, and the needle withdrawing spring 22 may be in the natural state or may still be in the compressed state, and only the compression degree is lighter than that in other times); the needle withdrawing bin 5 is separated from the emitter clamping jaws 26, is positioned at the farthest end of the needle withdrawing bin slide way 17 (the far end refers to the direction far away from the skin, and the near end refers to the direction close to the skin), and is blocked by a needle withdrawing bin limiting block 38 of the trigger assembly 9; the limiting groove 41 of the trigger assembly 9 slides to the farthest end along the limiting sheet 42 and is blocked by the final position lug 44 at the end part of the limiting sheet 42.

By pressing the needle withdrawing cabin knob 6 and pulling down the trigger component reset button 7, the needle booster 2 is returned to the initial locking position, and then can be used for the next implantation operation. At the moment, the needle withdrawing spring 22 is compressed again, the needle withdrawing bin 5 withdraws along the needle withdrawing bin slide way 17 and is fixed by the emitter clamping jaws 26 again; the trigger assembly 9 is retracted along the stop 42 and extends the longest out of the housing 8, the catch 40 returns to the home position 45, and each trigger piece 39 is again stopped by the home stop mechanism 28 (fig. 18).

EXAMPLE 3 needle assist device without splines in the housing

The needle assisting device provided by the embodiment is different from the needle assisting device provided by the embodiment 1 in that the positioning sheet 16 is not arranged on the shell, so that the needle withdrawing bin slide way 17 and the notch 18 are correspondingly lacked.

Example 4 comparison of the effects of use

This example compares the effects of using the needle assist devices provided in examples 1 and 3, respectively, after 20 times of returning the needle assist device to the initial locked state until the completion of the implantation, and the results are shown in table 1.

Table 1 comparison of usage effects list

As can be seen from the table 1, the cylindrical locating piece 16 is arranged on the shell, and the locating piece 16 extends into the trigger assembly, so that the needle withdrawing bin 5 is ingeniously matched, the design can obviously improve the stability and smoothness of the needle withdrawing process and the recovery of the initial locking state, the needle assisting device can be used for more times of implantation and needle withdrawing more smoothly, the operation of the recovery of the initial locking state is realized, the repeated use of the needle assisting device is really realized, the cost for continuously monitoring physiological indexes is greatly reduced, and the economic burden of a patient is reduced.

The application of the present invention is not limited thereto. Such as expansion according to the application range in the aspect of environmental protection. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A reusable needle assist device is characterized by comprising a needle assist device, wherein the needle assist device comprises a first state, a second state and a third state;

2. The device of claim 1, wherein the return mechanism comprises a first return mechanism and a second return mechanism, the first return mechanism being capable of returning the resilient element in the chamber containing the sharps member from a longest state to a compressed state; the second return mechanism is capable of returning the trigger assembly to the locked position.

3. The device of claim 2, wherein the force applying points of the first and second restoring mechanisms can respectively extend out of the housing from different openings of the housing of the needle assister; the stress point of the first restoring mechanism is positioned at the opening at the top end of the shell, the stress point of the second restoring mechanism is positioned at the elongated opening at the side edge of the shell, and the stress point of the second restoring mechanism can slide along the elongated opening.

4. The device of claim 3, wherein the first restoring mechanism comprises a sharp-object-containing cavity and a motion track thereof, and when a force is applied to a force-applying point of the first restoring mechanism, the sharp-object-containing cavity is restored to a lowest position along the motion track, the lowest position being that the sharp-object-containing cavity is directly combined with the emitter base of the needle booster, so that the elastic element inside the sharp-object-containing cavity is compressed.

5. The device as claimed in claim 4, wherein said chamber containing the sharp object comprises a needle withdrawing bin and a needle withdrawing bin cover, the needle withdrawing bin cover is detachably connected with the needle withdrawing bin, and the outer wall of the needle withdrawing bin is provided with a positioning rib; the movement track is provided by locating plates in the shell, and the movement track is formed between adjacent locating plates.

6. The device as claimed in claim 5, wherein when the needle withdrawing bin and the trigger assembly are assembled into the housing, the positioning plate can extend into the interior of the trigger assembly and cooperate with the positioning rib of the needle withdrawing bin to allow the needle withdrawing bin to move along the moving track, and a notch is further formed in the middle of each positioning plate.

7. The device of claim 6, wherein the force point of the first return mechanism is located on the retraction cage cover and the force point of the second return mechanism is located on the reset button on the trigger assembly; the second return mechanism comprises a trigger assembly and a reset button on the trigger assembly.

8. The device of claim 4, wherein the sharp-object containing cavity is directly engaged with the emitter base of the needle assisting device, and the needle withdrawing bin is fixed by the claw of the emitter base again.

9. The device of claim 4, wherein the resilient element is a needle retraction spring, the needle retraction spring being located within the needle retraction magazine, the needle retraction spring being compressed when the needle retraction magazine is secured by the emitter jaws.

10. The device as claimed in any one of claims 3 to 9, wherein the trigger assembly is provided with a trigger piece and a buckle, and after the force is applied to the stress point of the second restoring mechanism, the trigger assembly restores to the locking position: the trigger tab is again blocked by the initial stop mechanism of the transmitter base, disabling the displacement of the trigger assembly, while the latch is retracted back to the initial position of the locking tab in the housing.

11. The device as claimed in claim 10, wherein the locking piece in the housing is adapted to engage with a catch on the trigger assembly, the locking piece having two tooth-like recesses, wherein the proximal-most tooth-like recess is an initial position, and the second is an unlocked position, and when the catch is in the initial position, the needle assist device is in the first state; when the buckle is positioned at the unlocking position, the needle assisting device is in a second state; when the buckle leaves the unlocking position and continues to slide along the locking piece to the farthest end, the needle assisting device is in a third state; the other parts of the locking piece are in a linear structure after the initial position and the unlocking position are removed.

12. The device as claimed in claim 11, wherein a limiting piece is further provided in the housing, the trigger assembly can slide along the direction of the limiting piece, and a final position bump for stopping the trigger assembly from sliding continuously is provided at an end of the limiting piece.

13. The apparatus of claim 1, wherein the second state further comprises a pre-implantation initiation state and a full implantation procedure state; when the implant is in a state before the start of implantation, the trigger assembly leaves the locking position, and at the moment, the external force presses the shell, so that the whole implantation process state can be achieved; the full-process state of implantation comprises the whole process that the guide needle assists the sensor to be implanted into the skin, and then the guide needle is rapidly retracted and withdrawn.

14. A method of implanting a sensor using a needle assist device as claimed in any one of claims 1 to 12, comprising the steps of:

(2) triggering the needle assisting device to enter a second state;