CN114027945B - Reusable needle assisting device and use method thereof - Google Patents
Reusable needle assisting device and use method thereof Download PDFInfo
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- CN114027945B CN114027945B CN202111135621.7A CN202111135621A CN114027945B CN 114027945 B CN114027945 B CN 114027945B CN 202111135621 A CN202111135621 A CN 202111135621A CN 114027945 B CN114027945 B CN 114027945B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B17/3468—Trocars; Puncturing needles for implanting or removing devices, e.g. prostheses, implants, seeds, wires
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6867—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
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- Animal Behavior & Ethology (AREA)
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- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
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Abstract
The invention provides a reusable needle assisting device and a using method thereof, wherein a restoring mechanism capable of enabling a needle assisting device to restore to an initial locking state is arranged in the needle assisting device, the needle assisting device comprises a needle withdrawing bin, a needle withdrawing bin knob, a trigger component reset button and the like, and a buckle in the needle assisting device returns to an initial position by pressing the restoring mechanism, so that a needle withdrawing spring is compressed again, and the needle assisting device can be used for next sensor implantation. The needle withdrawing process of the needle assisting device is more stable and smooth through the arrangement of the restoring mechanism, implantation and needle withdrawing operations can be repeatedly carried out for more times, the process of recovering the initial locking state of the needle assisting device is more stable and accurate, dislocation and clamping phenomena are avoided in the process from the unlocking state to the recovering of the initial locking state for more times, and therefore the needle assisting device and the emitter in the needle assisting device can be repeatedly used, and the needle assisting device is simple in structure and convenient to use.
Description
Technical Field
The invention belongs to the field of medical equipment, relates to a human physiological parameter monitoring device, and particularly relates to a reusable needle assisting device and a using method thereof.
Background
Implantable biosensors have the advantage of continuously measuring certain important physiological or pathological parameters in the body over time, such as the concentration of oxygen, glucose, lactic acid, etc., to obtain a comprehensive and accurate diagnostic or therapeutic effect. The method is used for continuously monitoring the physiological parameters of the human body, and 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 the user needs to continuously prick the finger to obtain discontinuous test values and 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. Likewise physiological parameters such as lactic acid, uric acid and the like can be monitored by the method.
To wear such continuous monitoring devices, it is also necessary to implement them with a needle aid. Generally, the introducer needle is placed over the front end of the sensor, and when the needle assist is activated, the introducer needle is advanced into the implantation site in synchronism with the sensor, and then the introducer needle is quickly withdrawn, leaving the sensor in the subcutaneous tissue. Whether the needle aid can work stably and reliably relates to the success or failure of the sensor implantation and also relates to the experience of a user.
With the increasing penetration of the needle aid, the existing needle aid can accurately and stably implant the sensor and withdraw the needle through the precise matching of the internal mechanism, and provides more comfortable use experience for patients as much as possible, which further increases the price of the needle aid. However, most of the current needle assisting devices, such as blood sugar detection devices, are basically disposable medical appliances for ensuring sanitation and sterility, including the needle assisting device, an emitter inside the needle assisting device and the like, are discarded after use, have higher use cost, bring certain economic pressure to patients, and are unfavorable for environmental protection and carbon neutralization.
CN110461217a provides a needle aid which can be used only once, and is discarded after one implantation, and there are cases in which the needle withdrawal process after the implantation is completed is easily blocked; CN110720930 provides a needle aid, which can realize repeated use, but its structure is complex, and multiple springs are needed to cooperate, once multiple uses, the situations of inaccurate cooperation position, blocked or misplacement easily occur, and real repeated use is difficult to realize. Therefore, the needle assisting device can be reused under the condition of ensuring safety and sanitation, so that the cost is reduced, the structure is simple, the use is convenient, and the needle assisting device is a problem which needs to be solved in the prior art.
Disclosure of Invention
In order to solve the above problems, the present invention provides a reusable needle assisting device and a method for using the same, wherein a restoring mechanism capable of restoring a needle assisting device from an implantation completion state to a locking state is provided, 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 triggering component returns to a locking position, so that the needle assisting device can be used for next sensor implantation. The needle assisting device is provided with the recovery mechanism, so that the process of recovering the locking state of the needle assisting device is more stable and accurate, dislocation and clamping phenomena are avoided in the process from the implantation completion state to the recovery locking state for more times, the needle assisting device in the needle assisting device can be reused, the needle withdrawing process of the needle assisting device is more stable and smooth, the implantation-needle withdrawing-resetting-implantation-needle withdrawing-resetting operation can be repeated for more times, and the needle assisting device is simple in structure and convenient to use.
The existing needle aid is in a locking state before being used, so that the needle aid can be stored and transported conveniently and is safer. After unlocking, the needle aid can enter a working state, and the operation of implanting the needle aid into skin can be immediately performed. By applying force to the needle assist, the introducer needle in the needle assist aids in implanting the sensor into the skin, and the introducer needle is then withdrawn quickly from the skin. After one implantation is completed, the needle aid is in a working completion state, and is in an unlocking state, but cannot return to the working state again to perform implantation operation again, cannot return to a locking state again, can only be abandoned, and generates great waste.
According to the needle aid, the restoring mechanism for helping the needle aid to restore to the locking state is arranged in the needle aid, and the needle aid can quickly restore to the initial locking state by pressing the restoring mechanism, so that the needle aid can be repeatedly used for many times, and the cost is saved.
In one aspect, the present invention provides a reusable needle-aid device comprising a needle-aid comprising a first state, a second state, and a third state;
the first state is a locking state, and at the moment, an elastic element in a cavity containing a sharp object of the needle aid is in a compressed state, and a trigger assembly of the needle aid is in locking position; the second state is a working state, at the moment, the trigger component of the needle aid 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;
the needle aid is also provided with a restoring mechanism, and force is applied to the restoring mechanism, so that the needle aid can be restored to the first state from the third state.
In some embodiments, the elastic element is in its longest state, meaning that the elastic element returns to its natural state.
In some ways, the elastic element may be in its longest state and may be fully restored to its natural state, still compressed, but to a lesser extent.
In some embodiments, the elastic element may be any element that has inertia and returns to elastic deformation, such as a spring, rubber, etc.
In some aspects, the inclusion of a sharp is a sharp that aids in implantation of the sensor into the skin, such as a guide needle or the like; the sharp object containing cavity, such as a needle withdrawing bin in a needle aid, can be used for containing a guide needle.
Further, the restoring mechanism comprises a first restoring mechanism and a second restoring mechanism, wherein 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 restoring mechanism can restore the trigger assembly to the locking position.
Further, the stress points of the first restoring mechanism and the second restoring mechanism for applying force can extend out of the casing from different openings of the casing of the needle aid respectively; 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 strip-shaped opening at the side edge of the shell, and the stress point of the second restoring mechanism can slide along the strip-shaped opening.
In some modes, when the needle aid is in the first state and the second state, the stress point of the first recovery mechanism is positioned in the shell, and the stress point of the second recovery mechanism is positioned at the lowest point of the strip-shaped opening and cannot be pressed.
In some modes, the stress point of the first restoring mechanism is located on one side of the top end of the shell and is not located in the middle of the top end, because the whole first restoring mechanism is located in the eccentric position of the needle aid and is not located in the middle, and therefore the stress point of the first restoring mechanism also extends out from one side of the top end of the shell.
In some embodiments, after the needle assist device is in the second state, implantation is accomplished by depressing the housing, thereby causing the needle assist device to enter the third state.
In some modes, when the needle aid 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 at the strip-shaped opening.
Further, the first restoring mechanism comprises a sharp object cavity and a movement track thereof, and after a force is applied to a stress point of the first restoring mechanism, the sharp object cavity is restored to the lowest position along the movement track, and the lowest position is that the sharp object cavity is directly combined with a transmitter base of the needle assisting device, so that an elastic element inside the sharp object cavity is compressed.
Further, 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 convex rib; the movement track is provided by positioning sheets in the shell, and the movement track is formed between adjacent positioning sheets.
In some embodiments, the needle retraction housing cover may be threadably coupled to the needle retraction housing using a needle retraction housing knob.
In some aspects, the sharp is an introducer needle for implantation.
In some embodiments, after implantation is completed, the needle retraction knob may be rotated to separate it from the needle retraction housing, the guide needle may be withdrawn from the needle retraction housing, and the needle retraction housing knob may be screwed down to be combined with the needle retraction housing for further use.
Further, 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 as to enable the needle withdrawing bin to move along the direction of the moving track; a notch is also arranged in the middle of each positioning sheet.
In some modes, the outer wall of the needle withdrawing bin is provided with three positioning ribs in total, the shell is provided with three positioning pieces in total, and a notch is arranged in the middle of each positioning piece.
Further, the stress point of the first restoring mechanism is positioned on the needle withdrawing bin cover, and the stress point of the second restoring mechanism is positioned on the reset button on the trigger component; the second restoring mechanism comprises a trigger assembly and a reset button on the trigger assembly.
Further, the sharp object containing cavity is directly combined with the emitter base of the needle aid, namely the needle withdrawing bin is fixed by the clamping jaw of the emitter base again; the elastic element is a needle withdrawing spring, the needle withdrawing spring is positioned in the needle withdrawing bin, and when the needle withdrawing bin is fixed by the clamping jaw, the needle withdrawing spring is compressed.
Further, the trigger assembly is provided with a trigger piece and a buckle, and after a force is applied to the stress point of the second restoring mechanism, the trigger assembly returns to the locking position: the trigger piece is blocked again by the initial limiting mechanism of the emitter base, so that the trigger assembly cannot be displaced, and the buckle returns to the initial position of the locking piece in the shell.
Further, a locking piece in the shell can be matched with a buckle on the trigger assembly, two dentate concave positions are arranged on the locking piece, wherein the dentate concave position at the nearest end is an initial position, the second dentate concave position is an unlocking position, and when the buckle is positioned at the initial position, the needle aid is in a first state; when the buckle is positioned in the unlocking position, the needle aid is in a second state; when the buckle leaves the unlocking position and continues to slide along the locking piece to the most distal end, the needle aid is in a third state; and removing the initial position and the unlocking position, wherein other parts of the locking piece are of a linear structure.
The distal end refers to the direction away from the skin, and the proximal end refers to the direction close to the skin.
Further, a limiting piece is further arranged in the shell, the trigger assembly can slide along the direction of the limiting piece, and a final bump for stopping the trigger assembly from sliding continuously is arranged at the end part of the limiting piece.
Further, the second state further includes a pre-implantation start-up state and an implant full process state; the implantation is in a static state before starting, the trigger component leaves the locking position, external force presses the shell at the moment, and the implantation whole process state comprises the whole process that the guide needle helps the sensor to be implanted into the skin, and then the guide needle is quickly retreated to withdraw.
In yet another aspect, the present invention provides a method for sensor implantation using a needle-assist device as described above, comprising the steps of:
(1) Pressing the needle withdrawing bin cover to the bottom, and pulling down a reset button of the trigger assembly to enable the needle assisting device to return to the first state;
(2) Triggering the needle aid to enter a second state;
(3) Completing implantation operation, and enabling the needle aid to enter a third state;
(4) The needle withdrawing bin cover is pressed to the bottom again, and the reset button of the trigger assembly is pulled down, so that the needle aid returns to the first state and waits for the next implantation operation.
The arrangement of the locating piece in the shell and the arrangement of the locating convex rib on the outer wall of the needle withdrawing bin provide a needle withdrawing slideway for the needle withdrawing bin, so that the circumferential movement of the needle withdrawing bin can be prevented, the needle withdrawing process of the needle assisting device is more stable and smooth, and more implantation and needle withdrawing operations can be carried out; meanwhile, the matching of the needle withdrawing bin and the triggering component is more accurate, the process of restoring the locking state of the needle aid is more stable and accurate by pressing the needle withdrawing bin knob and the pull-down triggering component reset button, the fact that the buckle of the triggering component can be at the correct position every time is guaranteed, and dislocation and clamping phenomenon can not occur in the process from the third state to the first state for more times is guaranteed.
Simultaneously, the notch that sets up in the spacer can help the jack catch to open, makes the needle that moves back storehouse not fixed by the jack catch, moves back the needle rapidly under the effect of spring, prevents that the needle that moves back the process from appearing blocked, is difficult to the condition of moving back the needle, promotes further that the cooperation of needle storehouse and trigger assembly is more accurate, presses down needle storehouse knob and drop-down trigger assembly reset button and makes the process that helps the needle ware to resume locking state more stable, accurate, guarantees that the buckle of trigger assembly can both be in the exact position at every turn to guarantee to move back the needle process at more times to and can not produce dislocation and screens phenomenon from the in-process of third state to resume first state.
The locking piece in the shell removes the initial position and the unlocking position, and other parts are all linear structures, so that the needle aid is smoother when sliding from the second state to the third state, the phenomenon that the trigger assembly is blocked can not occur, and the needle aid is easier to recover from the third state to the first state.
The invention has the following beneficial effects:
1. the process of restoring the needle aid from the third state (implantation completion state) to the first state (locking state) is more stable and accurate, and the dislocation and clamping phenomenon can not be generated in the process of restoring the third state to the first state for more times;
2. Simultaneously, the implantation and needle withdrawing processes of the needle aid from the second state to the third state are more stable and smoother, and the implantation and needle withdrawing operations 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 the needle assisting device provided in embodiment 1;
FIG. 2 is an exploded view of the needle assist device of example 1;
fig. 3 is a schematic structural view of the needle aid provided in embodiment 1;
FIG. 4 is an exploded view of the internal structure of the needle aid 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 cartridge provided in embodiment 1;
FIG. 7 is a schematic view of the internal structure of the trigger assembly provided in embodiment 1;
FIG. 8 is a schematic view of the external structure of the trigger assembly provided in embodiment 1;
fig. 9 is a schematic diagram showing the upper structure of the emitter base provided in embodiment 1;
fig. 10 is a schematic view showing the lower structure of the emitter base provided in embodiment 1;
fig. 11 is a schematic structural view of the base provided in embodiment 1;
FIG. 12 is a schematic cross-sectional view of the needle aid of embodiment 2 from the third state to the first state and then from the second state to the third state;
FIG. 13 is a schematic cross-sectional view of the needle assist device according to embodiment 2 in a third state, wherein the needle assist device has been implanted and the guide needle has been retracted into the needle retraction chamber;
FIG. 14 is a schematic cross-sectional view showing a first state of the needle assist device according to embodiment 2, wherein the needle retraction knob is opened to pour the guide needle, and the needle assist device clamps the emitter;
FIG. 15 is a cross-section of a second state of the needle assist device provided in example 2, prior to implantation, with the needle assist device clamping the emitter and sensor assembly;
FIG. 16 is a schematic cross-sectional view showing the state of the implantation process in the second state of the needle aid according to example 2, wherein the needle aid clamps the emitter and sensor assembly in combination and then implants the retracting needle against the skin;
FIG. 17 is a schematic cross-sectional view of the trigger assembly of embodiment 2 in different positions;
fig. 18 is a schematic view of the trigger piece of the trigger assembly provided in embodiment 2 locked with the initial stop mechanism on the transmitter base.
Detailed Description
The following description of the preferred embodiments of the present invention in further detail with reference to the accompanying drawings, it should be noted that the following embodiments are intended to facilitate an understanding of the present invention, and are not intended to limit the invention in any way, and all of the features disclosed in the embodiments of the present invention, or all of the steps in the methods or processes disclosed, can be combined in any way, except mutually exclusive features and/or steps.
Example 1 the needle aid device provided by the invention
The needle assisting device provided in this embodiment is shown in fig. 1 to 11, in which fig. 1 is an overall structure schematic diagram of the needle assisting device, fig. 2 is an exploded view of the needle assisting device, fig. 3 is a structure schematic diagram of the needle assisting device, fig. 4 is an exploded view of an internal structure of the needle assisting device, fig. 5 is a structure schematic diagram of a housing, fig. 6 is a structure schematic diagram of a needle withdrawing bin, fig. 7 is an internal structure schematic diagram of a triggering assembly, fig. 8 is an external structure schematic diagram of the triggering assembly, fig. 9 is an upper structure schematic diagram of a transmitter base, fig. 10 is a lower structure schematic diagram of the transmitter base, and fig. 11 is a structure schematic diagram of the base.
As shown in fig. 1 and 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 a guide needle 50 and a sensor assembly 51, and a restoring mechanism 4 for restoring the needle assisting device 2 from a third state to a first state is provided in the needle assisting device 2, and includes a first restoring mechanism 401 and a second restoring mechanism 402. By pressing the restoring mechanism 4, the needle aid 2 can be quickly restored to the initial locking state, so that the needle aid can be repeatedly used for a plurality of times, and the cost is saved. Before being used, the needle aid 2 and the base 3 are separately and independently packaged, the base 3 containing the guide needle 50 and the sensor assembly 51 is subjected to sterilization treatment and sealed packaging, and the needle aid 2 is not subjected to sterilization treatment.
Preferably, the first return mechanism 401 comprises a needle retraction magazine 5, a needle retraction magazine knob 6 (corresponding to a needle retraction magazine cover) and a needle retraction magazine slide 17 provided by a positioning tab 16 on the housing 8; the second restoring 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 aid 2 is formed by sequentially assembling a shell 8, a trigger assembly 9, a needle withdrawing bin 5, a needle withdrawing spring 22 and a transmitter base 10 from top to bottom into a whole; 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 screwed with the threaded opening 11 in a matched manner; the upper end of the trigger assembly 9 is provided with a cavity 12 matched with the reset button 7 of the trigger assembly 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, and are used for enabling the needle aid to restore to a locking state. The top of the shell 8 is provided with a circular arc opening 13, the needle withdrawing bin knob 6 can extend out of the shell 8, the side edge of the shell 8 is provided with a strip-shaped opening 14, and the reset button 7 of the trigger assembly 9 can extend out of the shell 8. The needle-withdrawing-bin knob 6 is located at the side of the top end of the shell 8, not at the middle of the top end, because the first restoring mechanism 401 is located at the eccentric position of the needle aid 2 as a whole and not at the middle, and therefore the needle-withdrawing-bin knob 6 also extends from the side of the top end of the shell 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 arranged in the shell 8; when the needle-withdrawing bin 5 and the trigger assembly 9 are assembled into the shell 8, the positioning sheet 16 can extend into the trigger assembly 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 pieces 16 corresponds to the number of the positioning ribs 15 of the needle withdrawing bin 5, and the plurality of positioning pieces 16 are enclosed into a cylinder shape. A needle-withdrawing bin slideway 17 is arranged between adjacent positioning sheets 16 in the shell 8 and can be matched with the positioning convex edges 15 of the needle-withdrawing bin 5 so as to enable the needle-withdrawing bin slideway 17 to slide; still be equipped with opening 18 in the spacer 16 for help jack catch 26 open, make and move back needle storehouse 5 not fixed by jack catch 26, move back the needle rapidly under the effect of needle return spring 22, prevent to move back the needle in-process and appear by the card, be difficult to the condition of moving back the needle, also make simultaneously move back needle storehouse 5 and trigger assembly 9's cooperation more accurate, press back needle storehouse knob 6 and pull-down reset button 7 and make the process that helps needle ware 2 resumes the locking state more stable, accurate, guarantee that trigger assembly 9's buckle 40 can both be in the exact position each time, guarantee can not produce dislocation and screens phenomenon in more in-process from the third state to resume the first state.
By arranging the positioning sheet 16 on the shell 8, and enabling the positioning sheet 16 to extend into the trigger assembly 9 and be matched with the positioning convex rib 15 of the needle withdrawing bin 5, a needle withdrawing bin slideway 17 is provided for the needle withdrawing bin 5. By arranging the needle withdrawing bin 5 and providing the positioning convex edge 15 and the positioning sheet 16 of the needle withdrawing bin slideway 17, the needle withdrawing process of the needle assisting device 2 is more stable and smooth, and more times of implantation and needle withdrawing operations can be carried out; meanwhile, the matching of the needle withdrawing bin 5 and the triggering component 9 is more accurate, the process of restoring the locking state of the needle aid 2 by pressing the needle withdrawing bin knob 6 and the pull-down reset button 7 is more stable and accurate, the buckle 40 of the triggering component 9 is ensured to be in the correct position every time, and dislocation and clamping phenomenon can not be generated in the process from the third state to the first state for more times.
Preferably, the needle withdrawing bin 5 further comprises a needle holder 19, a bin barrel 20, a baffle 21 and a needle withdrawing spring 22; the needle holder 19 is positioned at the lower side inside the bin 20 and is used for clamping the guide needle 50; the needle holder end 23 is tightened, so that the guide needle 50 cannot fall off and can only move away from the skin; the tail 24 of the needle holder is arranged on a baffle 21 in the bin barrel 20; one end of the needle withdrawing spring 22 is connected with the emitter base 10, and the other end is connected with the baffle 21 in the bin barrel 20. The tail of the guide needle 50 is sleeved with the rubber cover 52, so that the tail size is increased, after the tail rubber cover 52 of the guide needle 50 enters the needle holder 19 under the action of certain pressure, the tail rubber cover is tightly gripped by the end 23 of the needle holder and cannot fall off in the direction approaching the skin, but can only displace in the direction separating from the skin, and therefore, after the guide needle 50 penetrates the skin, the guide needle can be rapidly withdrawn from the end 23 of the needle holder in the direction separating from the skin under the inertia 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 limiting 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, namely, the needle withdrawing spring is positioned outside the needle passing through hole 27, wraps the needle passing through hole 27, and is arranged in the claw 26; the claws 26 are surrounded by a plurality of claws, in this embodiment, the number of the claws 26 is 3, the end of each claw 26 is provided with a bump 29, the notch 18 in the positioning piece 16 can be used for limiting the bump 29 of the claw 26, and the claw 26 is prevented from being displaced in the direction 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 aid 2 to be in an initial locking state; the transmitter 31 is held under the transmitter base 10 by the elastic holding fastener 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 lower emitter 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 the unlocking of the needle aid 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 set 51 is taken out, and the emitter 31 can be recovered and reused. The lower emitter cover 33 may contain double sided adhesive tape to aid in adhering the emitter 31 to the skin after it is emitted. The 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 the positioning boss 55 of the emitter base 10, so as to confirm the position of the emitter 31 when combined with the emitter base 10.
In order to enable the emitter 31 to be recycled, a battery needs to be installed in the sensor suite 51, and because the battery occupies a certain space, the guide needle 50 and the sensor suite 51 need to be arranged at the eccentric position of the needle aid 2 and not positioned in the middle, so that the whole first restoring mechanism 401 is positioned at the eccentric position of the needle aid 2, and the needle withdrawing bin knob 6 also extends out from one side of the top end of the shell 8.
Preferably, as shown in fig. 7 and 8, the trigger assembly 9 comprises a jaw defining cavity 35 and a sleeve 36; the pawl defining cavity 35 may be used to define the pawl 26 to be drawn inwardly; the bottom of the claw limiting cavity 35 is provided with a claw limiting groove 37 which is concave inwards corresponding to each claw 26; the top of the claw limiting cavity 35 is provided with an outward protruding needle-withdrawing bin limiting block 38 for limiting the needle-withdrawing bin 5 to continuously move away from the skin; the sleeve 36 is provided with a trigger piece 39, a buckle 40 and a limit groove 41; the number of the trigger pieces 39 is more than one and the number of the trigger pieces 39 is 3 in the embodiment, and when the upper end of the trigger piece 39 abuts against the initial limiting mechanism 28 of the emitter base 10, the needle aid 2 is in an initial locking state; the number of snaps 40 is more than one, in this embodiment 3, circumferentially arrayed around the top of the sleeve 36; the number of the limiting grooves 41 is more than one and the number of the limiting grooves 41 in the embodiment is 3 as well, and the limiting grooves 41 are hollow grooves on the wall of the sleeve 36 and are arranged around the wall of the sleeve 36. The jaw defining cavity 35 may be used to define the jaws 26 inwardly toward one another so as to secure the needle retraction magazine 5 by the projection 29 at the end of the jaws 26 and to place the needle retraction spring 22 in a compressed state; when the claw 26 slides down to the claw limiting groove 37, the claw limiting groove 37 is recessed inwards, so that the claw 26 is loosened, the protruding block 29 at the end part of the claw is difficult to fix the needle withdrawing bin 5, and 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 also arranged in the shell 8; the limiting piece 42 can be matched with the limiting groove 41 on the trigger assembly 9 and used for positioning the trigger assembly 9, the trigger assembly 9 can slide along the direction of the limiting piece 42 and cannot rotate circumferentially, and a final position lug 44 is arranged at the end part of the limiting piece 42; the locking piece 43 can be matched with the buckle 40 on the trigger assembly 9, and two tooth-shaped concave positions are arranged on the locking piece 43, wherein the tooth-shaped concave position at the nearest end is an initial position 45, and the second tooth-shaped concave position is an unlocking position 46. The locking piece 43 in the shell 8 removes the initial position 45 and the unlocking position 46, and other parts are all in linear structures, so that the needle aid 2 can slide from the second state to the third state more smoothly, the phenomenon that the trigger assembly 9 is blocked can not occur, and the needle aid 2 can return from the third state to the first state more smoothly more easily.
Preferably, the base 3 is configured to carry the guide needle 50 and the sensor assembly 51, and is further configured to push the trigger tab 39 of the trigger assembly 9 away from the initial limit mechanism 28 to move the catch 40 of the trigger assembly 9 from the initial position 45 into the unlocked position 46, thereby moving the needle assist device 2 from the initial locked state into the unlocked state. When the catch 40 is in the initial position 45, the needle aid 2 is in the first state (locked state); when the catch 40 is pushed to the unlocking position 46, the needle aid 2 is unlocked into the second state; when the catch 40 passes the unlocking position 46 and reaches the start threshold 47, the needle aid 2 starts the implantation procedure until the implantation is completed, and after the guide needle 50 is withdrawn, the needle aid 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) Pressing the needle withdrawing bin knob 6 to the bottom, and pulling down the reset button 7 of the trigger assembly 9 to enable the needle aid 2 to return to the first state;
(2) Placing a guide needle 50 and a sensor suite 51 on the base, and performing sterilization treatment;
(3) Inserting the needle aid 2 into the base 3 to enable the needle aid 2 to enter a second state from the first state, and enabling the guide needle 50 and the sensor suite 51 on the base 3 to enter the lower emitter cover 33;
(4) The needle aid 2 is taken down and placed on the skin to be implanted, the shell is pressed down, the sensor is implanted into the skin with the help of the guide needle 50, the guide needle 50 is withdrawn, the implantation operation is completed, and the needle aid 2 enters a third state;
(5) The needle withdrawing bin 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 aid 2 returns to the first state and waits for the next implantation operation.
Embodiment 2 the needle aid provided by the invention returns to the first state from the third state
The specific structure of the needle aid 2 provided in this embodiment is shown in embodiment 1, the needle aid 2 has three states, namely, a first state, a second state and a third state, wherein the whole process section of the needle aid 2 from the third state to the first state and then from the second state to the third state is shown in fig. 12, the third state section of the needle aid 2 is shown in fig. 13, the first state section of the needle aid 2 is shown in fig. 14, the state section of the needle aid 2 before implantation in the second state is shown in fig. 15, the implantation process section in the second state of the needle aid 2 is shown in fig. 16, and the different position section of the buckle 40 of the trigger assembly 9 in different states is shown in fig. 17.
As shown in fig. 12, the needle aid 2 includes a first state, a second state, and a third state; wherein the first state is a locking state, the needle withdrawing spring 22 is in a compressed state, and the trigger assembly 9 of the needle aid 2 is in a locking position; the second state is the 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 completion state in which the needle retracting spring 22 is in the longest state.
Preferably, the second state also includes a pre-implant start-up state (lower right view of fig. 12) and an implant full process state (lower left view of fig. 12). The implantation is in a static state before starting, the trigger assembly 9 leaves the locking position, and the external force presses the shell 8 at the moment, so that the implantation whole process state comprises the whole process that the guide needle 50 helps the sensor to be implanted into the skin, and then the guide needle 50 is quickly withdrawn.
As shown in fig. 13, the needle aid 2 is provided with a return mechanism 4, and a force is exerted on the return mechanism 4 to enable the needle aid to return from the third state to the first state, comprising a first return mechanism 401 and a second return mechanism 402. The first restoring mechanism 401 can restore the elastic element (the needle withdrawing spring 22 in this embodiment) contained in the sharp object cavity 405 from the longest state to the compressed state; the second return mechanism 402 can return the trigger assembly 9 to the locked position.
As shown in fig. 13 and 14, the force bearing points 403 and 404 of the first restoring mechanism 401 and the second restoring mechanism 402, respectively, where the force is applied, may protrude from different openings of the housing 8 outside the housing 8; the stress point 403 of the first restoring mechanism 401 is located at the top opening 13 of the housing 8, the stress point 404 of the second restoring mechanism 402 is located at the elongated opening 14 on the side of the housing 8, and the stress point 404 of the second restoring mechanism 402 can slide along the elongated opening 14. When the needle aid 2 is in the first state and the second state, the stress point 403 of the first restoring mechanism 401 is located inside the housing 8, and the stress point 404 of the second restoring mechanism 402 is located at the lowest point of the elongated opening 14, so that when the needle aid 2 is in the second state, the housing 8 is required to be pressed (but the first restoring mechanism 401 and the second restoring mechanism 402 cannot be pressed) to complete implantation, and thus the third state is entered; when the needle aid is in the third state, the stress point 403 of the first restoring mechanism 401 extends out of the housing 8 from the opening of the housing 8, and the stress point 404 of the second restoring mechanism 402 also rises to the highest point at the elongated opening 14.
Preferably, the first restoring mechanism 401 includes a sharp object containing cavity 405 and its movement track (in this embodiment, the needle withdrawing cabin slide 17), and after a force is applied to the force bearing point 403 of the first restoring mechanism 401, the sharp object containing cavity 405 returns to the lowest position (i.e. closest to the skin) along the needle withdrawing cabin slide 17, at which time the sharp object containing cavity 405 is combined with the emitter base 10 again, so that the needle withdrawing spring 22 inside the sharp object containing cavity 405 is compressed.
Preferably, the sharp object containing cavity 405 comprises a needle withdrawing bin 5 and a needle withdrawing bin knob 6, the needle withdrawing bin knob 6 is detachably and spirally connected with the needle withdrawing bin 5, and a positioning convex rib 15 (fig. 6) is arranged on the outer wall of the needle withdrawing bin 5; the needle-withdrawal slide 17 is provided by spacers 16 (fig. 5) in the housing 8, with adjacent spacers 16 forming the needle-withdrawal slide 17 therebetween. The sharp object in this embodiment is the introducer needle 50 for implantation. When implantation is completed, the needle withdrawing bin knob 6 can be rotated to be separated from the needle withdrawing bin 5, the guide needle 50 is withdrawn from the needle withdrawing bin 5, and the needle withdrawing bin knob 6 is screwed to be combined with the needle withdrawing bin 5 so as to be used next time.
Preferably, when the needle-withdrawing bin 5 and the trigger assembly 9 are assembled into the shell 8, the positioning piece 16 can extend into the trigger assembly 9 and be matched with the positioning convex rib 15 of the needle-withdrawing bin 5, so that the needle-withdrawing bin 5 moves along the direction of the needle-withdrawing bin slideway 17.
Preferably, the stress point 403 of the first restoring mechanism 401 is located on the needle withdrawing bin knob 6, and the stress point 404 of the second restoring mechanism 402 is located on the reset knob 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 sharp object containing cavity 405 is directly combined with the emitter base 10, meaning that the needle withdrawing bin 5 is again fixed by the claw 26 of the emitter base 10; the needle return spring 22 is located in the needle return magazine 5, and the needle return spring 22 is compressed when the needle return magazine 5 is held by the catch 26.
Preferably, the trigger assembly 9 is provided with a trigger piece 39 and a buckle 40, and after a force is applied to the stress point 404 of the second restoring mechanism 402, the trigger assembly 9 returns to the locked position: the trigger tab 39 is again blocked by the initial stop mechanism 28 of the transmitter base 10, rendering the trigger assembly 9 unable to displace, while the catch 40 is retracted again to the initial position 45 of the locking tab 43 in the housing 8.
Preferably, as shown in fig. 17, the locking piece 43 in the casing 8 can be matched with the buckle 40 on the trigger assembly 9, and two tooth-shaped concave positions are arranged on the locking piece 43, wherein the nearest tooth-shaped concave position is an initial position 45, the second tooth-shaped concave position is an unlocking position 46, and when the buckle 40 is positioned at the initial position 45, the needle aid 5 is in a first state; when the buckle 40 is positioned in the unlocking position 46, the needle aid 2 is in a pre-implantation starting state of the second state; when the buckle 40 leaves the unlocking position 46 and passes the critical position 47, the needle aid 2 enters an 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 aid 2 is in the third state.
Preferably, a limiting piece 42 is further arranged in the shell 8, the trigger assembly 9 can slide along the direction of the limiting piece 42, and a final bump 44 for stopping the trigger assembly 9 from sliding continuously is arranged at the end of the limiting piece 42.
As shown in fig. 13, when the needle booster 2 is in the third state, the implantation is completed, 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 still be in the compressed state, but the compression degree is lighter than that at other times); the needle withdrawing bin 5 is separated from the claw 26, is positioned at the most distal end of the needle withdrawing bin slideway 17 and is blocked by a needle withdrawing bin limiting block 38 of the trigger assembly 9; the limit groove 41 (fig. 8) of the trigger assembly 9 slides along the limit tab 42 (fig. 5) to the extreme end, blocked by the end tab 44 at the end of the limit tab 42. The needle withdrawing bin knob 6 extends out of the shell 8 from the arc-shaped opening 13 of the shell 8, and the reset button 7 of the trigger assembly 9 is positioned at the uppermost end of the elongated opening 14 arranged at the side edge of the shell 8. At this time, the needle aid 2 is returned to the first state (fig. 14) by pressing the needle-withdrawing-bin knob 6 and pulling down the trigger-component reset button 7, so that the needle aid can be used for the next implantation operation. At this time, the needle withdrawing spring 22 is compressed again, the needle withdrawing bin 5 is withdrawn along the needle withdrawing bin slideway 17 and is fixed again by the emitter claw 26; the trigger assembly 9 is retracted along the stop tab 42, extending the longest length 406 of the housing 8, and the catch 40 is returned to the initial position 45 (fig. 17), each of the trigger tabs 39 again being blocked by the initial stop mechanism 28 (fig. 18).
In the process of returning to the first state from the third state, the needle withdrawing bin 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 and cannot continue to move downwards, the trigger piece is just in the initial position and is in the locking state, the initial position 45 and the unlocking position 46 are inclined planes, the buckle 40 is very thin, the initial position 45 and the unlocking position 46 of the locking piece 43, the critical position 47 and the like are easy to move, and the phenomenon that the buckle 40 is blocked and fixed only to the unlocking position 46 in the process of returning to the first state does not occur.
The needle aid 2 in the first state is required to be unlocked with the aid of the base 3 to enter a pre-implantation starting state (fig. 15) in the second state, so that implantation operation can be performed, specifically, the needle aid 2 is placed on the base 3, the bottom of the needle aid 2 is aligned with the corresponding position of the base 3, if a fool-proof groove 48 is arranged below a sleeve 36 of a trigger assembly 9 of the needle aid 2, a fool-proof block 49 (fig. 11) corresponding to the fool-proof groove 48 is arranged on the base 3, and therefore, the bottom of the needle aid 2 and the base 3 are aligned with the fool-proof block 49 to determine the position in the process of matching unlocking. After alignment, the needle aid 2 is pressed down, the base 3 forces each trigger piece 39 of the trigger assembly 9 to leave the initial limit 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 aid 2 enters the unlocking state, and simultaneously the guide needle 50 and the sensor assembly 51 arranged on the base 3 are pressed into the emitter lower cover 33 in the needle aid 2 to be 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 by the base 3, the degree of unlocking is controlled by the depth of the groove in the base 3, and when pressed, the trigger piece 39 is pushed away, but since the distance of movement is limited by the depth of the groove in the base 3, the catch 40 will only push from the initial position 45 to the unlocking position 45, and will not directly go further upwards beyond the unlocking position 45.
A schematic representation of the state before implantation in the second state of the needle aid 2 is shown in fig. 15, and a schematic representation of the state of the implantation process in the second state of the needle aid 2 is shown in fig. 16.
At this time, only the skin position of the sensor to be implanted needs to be aligned, the casing 8 of the needle aid 2 is pressed, the casing 8 descends, the locking piece 43 in the casing 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 along the needle withdrawing bin slideway 17 in the direction away from the skin, and the needle holder 19 is promoted to rapidly withdraw the guide needle 50 from the skin. As the force of the needle retraction spring 22 is further released, the needle retraction cartridge 5 continues to move away from the skin until it is stopped after hitting the needle retraction cartridge stop 38, and the trigger assembly 9 stops at the final position blocked by the final position bump 44. FIG. 15 is a cross-sectional view of the needle assist grip emitter in combination with the sensor assembly 51, implanted with the rearward needle against the skin; fig. 16 is a final sectional view of the needle holder holding emitter 31 and sensor combination, with the implant completed and the introducer needle retracted into the needle retraction cartridge. At this point, the front end of the sensor has been implanted in the skin and the emitter 31 has been attached to the skin by 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 of the needle withdrawing bin 5, and the needle withdrawing bin knob 6 is screwed again to be combined with the needle withdrawing bin 5 so as to be used next time.
After implantation, the needle aid 2 is still in an unlocked state, and the needle withdrawing spring 22 is in the longest state (the longest state does not necessarily mean that the needle withdrawing spring 22 is completely restored to a natural state, and the needle withdrawing spring 22 can be in a natural state or still be in a compressed state, but the compression degree is lighter than that of other times); the needle withdrawing bin 5 is separated from the emitter claw 26 and is positioned at the most distal end (the distal end refers to the direction away from the skin and the proximal end refers to the direction close to the skin) of the needle withdrawing bin slideway 17, and is blocked by a needle withdrawing bin limiting block 38 of the trigger assembly 9; the limit slot 41 of the trigger assembly 9 slides along the limit tab 42 to the extreme end, blocked by the end tab 44 at the end of the limit tab 42.
By pressing the needle-withdrawing bin knob 6 and pulling down the trigger assembly reset button 7, the needle aid 2 is restored to the initial locking position, and can be used for the next implantation operation. At this time, the needle withdrawing spring 22 is compressed again, the needle withdrawing bin 5 is withdrawn along the needle withdrawing bin slideway 17 and is fixed again by the emitter claw 26; the trigger assembly 9 is retracted along the stop tab 42, extending the longest length of the housing 8, the catch 40 returns to the initial position 45 and each trigger tab 39 is again blocked by the initial stop mechanism 28 (fig. 18).
Example 3 needle-aid device without locating plate in housing
The difference between the needle assisting device provided in this embodiment and embodiment 1 is that the positioning piece 16 is not provided in the housing, so that the needle withdrawing bin slideway 17 and the notch 18 are correspondingly omitted.
Example 4 comparison of use effects
In this example, the needle assisting devices provided in example 1 and example 3 were used, and the needle assisting device was returned to the initial locking state 20 times until implantation was completed, and the use effects of the needle assisting devices provided in example 1 and example 3 were compared, and the results are shown in table 1.
Table 1 use effect comparison list
It can be seen from table 1 that, by arranging the cylindrical positioning sheet 16 on the housing and making the positioning sheet 16 extend into the triggering assembly, thereby performing ingenious matching with the needle withdrawing bin 5, the stability and smoothness of the needle withdrawing process and the initial locking state recovery can be obviously improved by such design, so that the needle assisting device can perform more times of implantation and needle withdrawing and the operation of recovering the initial locking state more smoothly, the repeated use of the needle assisting device is truly realized, the cost of continuously monitoring the physiological index is greatly reduced, and the economic burden of a patient is lightened.
The application of the present invention is not limited thereto. Such as by its range of application in environmental protection. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (6)
1. A reusable needle assist device comprising a needle assist device, the needle assist device comprising a first state, a second state, and a third state;
the first state is a locking state, and at the moment, an elastic element in a cavity containing a sharp object of the needle aid is in a compressed state, and a trigger assembly of the needle aid is in locking position; the second state is a working state, at the moment, the trigger component of the needle aid 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;
the needle aid is also provided with a restoring mechanism, and force is applied to the restoring mechanism, so that the needle aid can be restored to the first state from the third state; 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 restoring mechanism can restore the triggering component to the locking position; the stress points of the first restoring mechanism and the second restoring mechanism for applying force can extend out of the shell from different openings of the shell of the needle aid respectively; 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 strip-shaped opening at the side edge of the shell, and the stress point of the second restoring mechanism can slide along the strip-shaped opening;
The first restoring mechanism comprises a sharp object cavity and a movement track thereof, and after a force is applied to a force bearing point of the first restoring mechanism, the sharp object cavity is restored to the lowest position along the movement track, wherein the lowest position is that the sharp object cavity is directly combined with a transmitter base of the needle assisting device, so that an elastic element in the sharp object cavity is compressed; the sharp object containing cavity is directly combined with the emitter base of the needle aid, namely the needle withdrawing bin is fixed by the clamping jaw of the emitter base again;
the cavity 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 convex rib; the movement track is provided by positioning sheets in the shell, and a movement track is formed between adjacent positioning sheets; 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 movement track, and a notch is further formed in the middle of each positioning sheet;
the trigger assembly is provided with a trigger piece and a buckle, and after a force is applied to a stress point of the second restoring mechanism, the trigger assembly returns to a locking position: the trigger piece is blocked again by the initial limiting mechanism of the emitter base, so that the trigger assembly cannot be displaced, and the buckle returns to the initial position of the locking piece in the shell.
2. The device of claim 1, wherein the force point of the first return mechanism is located on the needle retraction housing cover and the force point of the second return mechanism is located on the reset button on the trigger assembly; the second restoring mechanism comprises a trigger assembly and a reset button on the trigger assembly.
3. The device of claim 2, wherein the resilient element is a needle retraction spring positioned within the needle retraction chamber, the needle retraction spring being compressed when the needle retraction chamber is secured by the emitter jaw.
4. A device according to claim 3, wherein a locking tab in the housing is engageable with a catch on the trigger assembly, the locking tab having two toothed recesses therein, wherein the most proximal toothed recess is the initial position and the second is the unlocked position, the needle assist being in the first state when the catch is in the initial position; when the buckle is positioned in the unlocking position, the needle aid is in a second state; when the buckle leaves the unlocking position and continues to slide along the locking piece to the most distal end, the needle aid is in a third state; and removing the initial position and the unlocking position, wherein other parts of the locking piece are of a linear structure.
5. The device of claim 4, wherein the housing further comprises a limiting plate, the trigger assembly is slidable along the limiting plate, and a terminal projection is provided at an end of the limiting plate to terminate further sliding of the trigger assembly.
6. The apparatus of claim 5, wherein the second state further comprises a pre-implant start-up state and an implant full process state; when the trigger assembly is in a state before implantation starting, the trigger assembly leaves the locking position, and the external force presses the shell at the moment, so that the whole implantation process state can be entered; the implant process state includes the process of the introducer needle helping to implant the sensor into the skin and then the introducer needle is withdrawn quickly.
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| CN114767229B (en) * | 2022-04-14 | 2023-03-24 | 深圳可孚生物科技有限公司 | Auxiliary applicator for biosensor |
| CN115998985B (en) * | 2022-11-30 | 2024-09-24 | 宁波睿爱产品设计有限公司 | Needle aid capable of being used repeatedly |
| CN115998986B (en) * | 2022-11-30 | 2024-09-20 | 宁波睿爱产品设计有限公司 | Repeatable use needle aid for use |
| CN115844389B (en) * | 2022-12-28 | 2025-02-25 | 江苏鱼跃凯立特生物科技有限公司 | A biological monitoring sensor implant device and a continuous blood glucose monitor |
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