CN111001057B

CN111001057B - Application type subcutaneous indwelling needle

Info

Publication number: CN111001057B
Application number: CN201811166688.5A
Authority: CN
Inventors: 胡超宇
Original assignee: Puang Hangzhou Medical Technology Co ltd
Current assignee: Puang Hangzhou Medical Technology Co ltd
Priority date: 2018-10-08
Filing date: 2018-10-08
Publication date: 2021-08-03
Anticipated expiration: 2038-10-08
Also published as: CN111001057A

Abstract

The invention relates to the technical field of infusion, and particularly discloses an application type subcutaneous indwelling needle which at least comprises an indwelling mechanism, wherein the indwelling mechanism at least comprises an indwelling seat, the upper end of the indwelling seat is provided with an infusion connector, an indwelling steel needle is arranged in the center of the infusion connector, the lower end surface of the indwelling seat is a bonding part, the lower end of the indwelling seat is also provided with an indwelling soft needle protruding out of the bonding part, the indwelling soft needle and the indwelling steel needle are coaxially arranged, and a one-way liquid flow device is arranged between the indwelling steel needle and the indwelling soft needle. In the above-mentioned structure, keep somewhere the mechanism in have simultaneously and keep somewhere the steel needle and keep somewhere soft needle, wherein keep somewhere the part of soft needle and be located the subcutaneous, keep somewhere the steel needle and be located the infusion and connect, the aim at who so sets up need not to reuse the steel needle of syringe during the injection, only need will not take the link of the syringe of syringe needle or insulin transfer pump and infusion articulate can, have convenient to use, the wide technical advantage of application scope.

Description

Application type subcutaneous indwelling needle

Technical Field

The invention relates to the technical field of infusion, in particular to an application type subcutaneous indwelling needle.

Background

The use of indwelling needles, which typically include venous indwelling needles and subcutaneous indwelling needles, can reduce the pain associated with repeated punctures by the patient. Especially for diabetic patients, who require regular subcutaneous injections of insulin, the use of indwelling needles is more desirable. The existing indwelling needle used by the diabetic patient is only provided with a soft needle generally, and needs to be matched with a steel needle of an insulin syringe when in use, so that the size and the length of the steel needle are strictly limited; the difficulty of the needle insertion and puncture operation of a patient is high, and the convenience is poor; the steel needle is disposable, and the use cost is higher, and economic nature is poor.

Disclosure of Invention

The invention aims to solve the technical problems of inconvenient use and high cost of an indwelling needle used by a diabetic patient in the prior art.

In order to solve the technical problems, the technical scheme provided by the invention is as follows: the indwelling needle is characterized by at least comprising an indwelling mechanism, wherein the indwelling mechanism at least comprises an indwelling seat, an infusion connector is arranged at the upper end of the indwelling seat, an indwelling steel needle is arranged at the center of the infusion connector, the lower end face of the indwelling seat is a bonding part, an indwelling soft needle protruding out of the bonding part is further arranged at the lower end of the indwelling seat, the indwelling soft needle and the indwelling steel needle are coaxially arranged, and a one-way liquid flow device is arranged between the indwelling steel needle and the indwelling soft needle.

In a preferred embodiment, the indwelling steel needle is fixedly arranged relative to the indwelling seat, and the one-way liquid flow device is a one-way valve.

In a preferred embodiment, the remaining steel needle is fixedly arranged on a steel needle seat, the steel needle seat is movably arranged relative to the remaining seat, and the steel needle seat can move along the axial direction of the remaining steel needle.

In a preferred embodiment, the one-way liquid flowing device is a sealing plug which can be pierced by a remaining steel needle, and a compression resetting part is arranged between the steel needle seat and the sealing plug.

The puncture mechanism at least comprises a puncture seat and a puncture needle arranged in the center of the puncture seat, and the puncture needle penetrates through the indwelling steel needle and the indwelling soft needle.

In a preferred embodiment, the puncture mechanism is movably connected with the main housing in the axial direction in the main housing, an elastic launching mechanism is arranged between the puncture mechanism and the main housing, the connection structure between the indwelling mechanism and the puncture mechanism, and the puncture mechanism at least comprises two limit positions in the main housing: a puncture location and a location to be fired.

In a preferred embodiment, the elastic launching mechanism is an annular elastic rope, the inner side of the main casing body is provided with a pair of elastic rope limiting portions, the puncture seat is provided with a pair of elastic rope limiting grooves, and the elastic rope connects the puncture mechanism and the main casing body together through the elastic rope limiting portions and the elastic rope limiting grooves.

In a preferred embodiment, at least two sets of guiding and limiting mechanisms are arranged between the puncture seat and the main shell, and each guiding and limiting mechanism is provided with a puncture position limiting part and a to-be-launched position limiting part.

In a preferred embodiment, the guiding and limiting mechanism at least comprises a first clamping piece arranged on the inner wall of the main shell and a second clamping piece arranged on the outer wall of the puncture seat, and the second clamping piece has elasticity; the first clamping piece comprises a group of clamping edges which are arranged oppositely, a guide groove which is matched with the second clamping piece is formed between the clamping edges, and guide grooves which are matched with the clamping edges are arranged on two sides of the second clamping piece.

According to a preferred embodiment, the upper end of the first clamping piece is provided with a first limiting step, the upper end of the second clamping piece is provided with a second limiting step matched with the first limiting step, the puncture mechanism is located at a position to be launched, and the first limiting step is matched with the second limiting step.

According to a preferred embodiment, the lower end of the clamping edge is provided with a third limiting step, a fourth limiting step matched with the three phases of the third limiting step is arranged in the puncturing seat close to the upper end of the second clamping piece, the puncturing mechanism is located in a puncturing state, and the third limiting step is matched with the fourth limiting step.

The utility model provides a preferred embodiment, keep somewhere the chamber in the upper end of seat, infusion connects and is located keep somewhere the intracavity, it is equipped with the protective cover on the chamber to keep somewhere, the central point of protective cover puts and is equipped with the flexible portion of being made by flexible material.

In a preferred embodiment, the infusion connector is internally provided with internal threads, and the side wall of the infusion connector is provided with a plurality of notches.

The application type subcutaneous indwelling needle of the embodiment has the indwelling steel needle and the indwelling soft needle simultaneously in the indwelling mechanism, wherein the part of the indwelling soft needle is positioned subcutaneously, the indwelling steel needle is positioned in the infusion joint, the aim of the arrangement is that the steel needle of the injector is not needed to be reused during injection, only the connecting end of the injector without a needle head or the insulin infusion pump is needed to be connected with the infusion joint, and the application range is wide. In addition, set up elasticity firing mechanism between puncture mechanism and the main casing body, realized the puncture through elasticity firing mechanism, had convenient to use, puncture rapidly and the less benefit of patient's sense of pain.

Drawings

FIG. 1 is a schematic view showing the configuration of an applicator type hypodermic needle of the present embodiment in an inactivated state;

FIG. 2 is a schematic view showing the exploded structure of the application type hypodermic needle of the present embodiment;

FIG. 3 is a schematic perspective view of the main housing of the application type hypodermic needle of the present embodiment in a top view;

FIG. 4 is a schematic perspective view of the main housing of the application type hypodermic needle of the present embodiment in a bottom view;

FIG. 5 is a schematic view showing the structure of the puncturing mechanism in the application type hypodermic needle of the present embodiment;

FIG. 6 is a structural view of the puncture mechanism in the application type hypodermic needle of the present embodiment in a bottom view;

FIG. 7 is a schematic view showing the connection of the puncturing mechanism to the main housing in a puncturing state in the application type hypodermic needle of the present embodiment;

FIG. 8 is a sectional view of the state shown in FIG. 7;

FIG. 9 is a schematic view showing the connection of the puncture mechanism to the main housing in a state ready for firing in the application-type hypodermic needle of the present embodiment;

fig. 10 is a sectional view of the state shown in fig. 9;

FIG. 11 is a schematic view showing the construction of an indwelling mechanism for an applied subcutaneous indwelling needle according to the present embodiment;

FIG. 12A is a cross-sectional view of the indwelling mechanism in the application-type subcutaneous indwelling needle according to the present embodiment;

FIG. 12B is a sectional view of the indwelling mechanism of the second embodiment of the application-type hypodermic needle of this embodiment;

FIG. 13 is a cross-sectional view of the applicator hypodermic needle of FIG. 12A in an injection configuration;

FIG. 14 is a schematic structural view of a steel needle holder and an indwelling steel needle in the application-type subcutaneous indwelling needle of the present embodiment;

FIG. 15 is a schematic view of the retaining mechanism and the protective cover of the application type hypodermic needle of the present embodiment;

FIG. 16 is a structural view showing the indwelling needle in the applied subcutaneous needle in accordance with the present embodiment in a bottom view;

FIG. 17 is a schematic view showing the structure of a indwelling base which is fitted and connected to a indwelling base in the application-type subcutaneous indwelling needle according to the present embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example one

As shown in FIGS. 1 and 2, the present embodiment of an applicator type hypodermic indwelling needle comprises at least a main housing 10, a puncture mechanism 40 and an indwelling mechanism 50. The two ends of the main shell 10 are both open structures, in an unopened state, the upper opening of the main shell 10 is closed by a closing sticker 30, and the edge of the closing sticker 30 is provided with a flange 31 which is convenient for tearing off the closing sticker by hand; the lower end of the main housing 10 is open and provided with a cover 20, and the edge of the cover 20 is also provided with a protrusion 21 for facilitating the separation of the cover from the main housing.

As shown in fig. 11 to 13, in the indwelling mechanism 50 of the present embodiment, the indwelling mechanism 50 is connected to the main housing 10 by the puncture mechanism in an inactivated state, and after the indwelling mechanism is activated, the adhesive portion 5204 of the indwelling mechanism is adhered to the skin of the patient, and the main housing 10 and the puncture mechanism 40 are discarded.

In the present embodiment, the indwelling mechanism 50 according to the first embodiment includes, as shown in fig. 11 and 12A, an indwelling base 51 and an indwelling base 52 which is connected to the indwelling base 51 in a fitting manner. Wherein, the upper part of the retention seat 51 is provided with a retention cavity 52, the center of the retention cavity 52 is provided with an infusion connector 53 extending upwards, and the center of the infusion connector 53 is provided with a retention steel needle 54. On the side of the retention base 51 remote from the retention lumen 52 is provided a soft retention needle 55 communicating with a steel retention needle 54 which, in use, is partially embedded under the skin of the patient.

As shown in fig. 14, the indwelling steel needle 54 is fixedly mounted on the steel needle holder 511. Wherein the indwelling steel needle 54 has a lower end 542 near the side of the indwelling soft needle and an upper end 541 far from the side of the indwelling soft needle. The steel needle holder 511 is provided with an annular boss 514, and the annular boss 514 has an upper step surface 516 and a lower step surface 515.

In this embodiment, the steel needle holder 511 is movably provided with respect to the indwelling needle 51, and the steel needle holder 511 is movable in the axial direction of the indwelling needle 54. Specifically, as shown in fig. 12A, the center of the retention base 51 is provided with a movable cavity 510 for accommodating the steel needle base, wherein the steel needle base 511 is located in the movable cavity 510, the retention soft needle 55 is connected to the retention base 52 through a soft needle base 5205, the lower end surface of the retention base 52 is an adhesive portion 5204, and in the activated state, the surface of the adhesive portion 5204 is covered with a layer of release paper.

The step surface 516 on the annular boss 514 of the steel needle holder 511 is used for limiting the upper limit position of the steel needle holder 511 in the movable cavity, the steel needle holder 511 below the annular boss 514 is sleeved with the compression resetting component 512, and the compression resetting component 512 acts on the lower step surface 515 of the annular boss 514. In the present embodiment, the compression return member 512 is preferably a compression spring, but the compression return member may have another structure having a compression return function, for example, a sleeve made of rubber.

Wherein, the upper end of the soft needle seat 5205 is provided with a sealing plug 56 as a one-way liquid flow device. As shown in fig. 12A, in the non-injection state, the lower end 542 of the indwelling needle 54 is separated from the sealing plug 56 by the action of the compression restoring member, and the lower side of the sealing plug 56 is a fluid flow chamber 59 communicating with the indwelling soft needle 55. As shown in fig. 13, when a syringe (e.g., an insulin pen) without a needle is connected to the infusion connector, the upper end 541 of the indwelling steel needle 54 communicates with the injection solution in the syringe, and the syringe compression steel needle holder 511 descends until the lower end 542 of the indwelling steel needle 54 pierces and communicates with the flow chamber 59 through the sealing plug 56, thereby completing the injection. After the injection is completed, the steel needle seat 511 is restored to the state shown in fig. 12A by compressing the restoring component, and the sealing plug 56 can prevent the injection from flowing back or blood returning.

In the present embodiment, as shown in fig. 11, it is preferable that the inside of the liquid feeding adapter 53 is provided with female threads, and a plurality of notches 57 are provided on the side wall of the liquid feeding adapter. Wherein the internal thread is intended for a threaded connection with the end of an insulin syringe or insulin pump. Set up the aim at of a plurality of breachs 57, because the material that constitutes the infusion and connects generally is the plastics material, certain deformability has, after setting up a plurality of breachs, when the infusion, threaded connection can be realized just to plug with the strength a little the tip of insulin syringe or insulin pump, need not to connect soon, the benefit lies in, owing to leave the seat and bond together with patient's skin, the process of connecting soon can cause the pulling to skin, there is the discomfort and produces, simultaneously, whether connect soon and also can't accurate judgement in place, if continue rotatory power too big after connecting soon in place, then probably cause and leave seat and skin separation.

In a preferred embodiment, as shown in fig. 15, the retaining base 50 is further provided with a protecting cover 70 adapted to the retaining cavity 58, and a hook 71 and a slot 517 adapted to each other are further provided between the protecting cover 70 and the retaining base 51. The protective cover 70 is used to protect the indwelling lumen from contamination, and can be opened when injection is required, and after injection is completed, the protective cover is connected with the indwelling seat in a matching manner to cover the indwelling lumen. It should be noted that, in the inactivated state, the protecting cover is connected with the retention seat. The puncture needle must pass the protective cap during the puncture procedure. In one embodiment, a through hole for accommodating the puncture needle is arranged at the center of the protective cover; in another embodiment, the protective cover is provided with a flexible portion 72 made of flexible material at its center, which is advantageous in that the puncture hole will automatically contract after the puncture needle is withdrawn, and the sealing and dust-proof performance is better.

As shown in fig. 16 and 17, in a preferred connection structure of the indwelling base 51 and the indwelling base 52 of the present embodiment, a connection column 5101 is disposed at a lower side of the indwelling base, an inner cavity of the connection column 5101 is a movable cavity 510, and a plurality of radial buckles 5102 are disposed on an outer periphery of a lower end of the connection column 5101. Correspondingly, the upper side of the indwelling base 52 is provided with a connecting sleeve 5201 matched with the connecting column 5101, the connecting sleeve 5201 is provided with a cylinder bottom 5202, and the cylinder bottom 5202 is provided with clamping grooves 5203 which are connected with the radial buckles 5102 in a one-to-one correspondence in quantity and structure.

As shown in fig. 5 and 6, the puncture mechanism 40 of the present embodiment includes a puncture base 41 and a puncture needle 44 disposed at the center of the puncture base, wherein the outer diameter of the puncture needle 44 is smaller than the diameters of the indwelling steel needle and the indwelling soft needle, and the puncture needle 44 penetrates the indwelling steel needle and the indwelling soft needle in the state of fig. 1, 7 to 10. Wherein, the upper end of the puncture seat 41 is provided with a lifting part 42, the upper edge of the lifting part 42 is provided with a convex edge 43, which is convenient for the finger lifting operation of the patient.

In the present embodiment, as shown in fig. 2, 7-10, the lancing mechanism 40 is axially movably coupled within the main housing 10 relative to the main housing. Also, an elastic launching mechanism 60 is provided between the puncturing mechanism 40 and the main casing 10. Wherein the lancing mechanism 40 includes at least two extreme positions within the main housing 10, a lancing position as shown in FIGS. 7 and 8 and a cocked position as shown in FIGS. 9 and 10, respectively. It should be noted that the applicator type hypodermic indwelling needle of the present embodiment is arranged such that the puncture mechanism 40 is located at the puncture position in the inactivated state shown in fig. 1.

In a preferred embodiment, two guiding and limiting mechanisms are provided between the puncture seat 41 and the main housing 10, and each guiding and limiting mechanism has a puncture position limiting part and a to-be-launched position limiting part. In this embodiment, as shown in fig. 3-6, the guiding and limiting mechanism comprises a first clamping piece 12 arranged on the inner wall of the main housing and a second clamping piece 46 arranged on the outer wall of the puncturing seat.

The first clamping piece 12 comprises a group of clamping edges 17 which are oppositely arranged, and a guide groove 16 which is matched with the second clamping piece 46 is formed between the clamping edges 17. Wherein, the two sides of the second clamping piece 46 are provided with guide grooves 48 corresponding to the clamping edges 12, and the second clamping piece 46 has elasticity. Second clamping piece 46 cooperates with guide groove 16 and clamping edge 12 cooperates with guide groove 48 to form a guide mechanism.

In this embodiment, the first limiting step 15 is located at the upper end of the first clamping piece 12, wherein the second limiting step 47 extending radially outwards and matching with the first limiting step 15 is located at the upper end of the second clamping piece 46. And when the puncture mechanism is positioned at the position to be launched, the first limiting step 15 is matched with the second limiting step 47.

In this embodiment, the lower end of the clamping edge 12 is provided with a third limiting step 13, wherein a fourth limiting step 49 matched with the third limiting step 13 is arranged inside the puncture seat 41 and close to the upper end of the second clamping piece 46. When the puncture mechanism is in the puncture state, the third limiting step 13 is matched with the fourth limiting step 49.

In this embodiment, the elastic launching mechanism 60 disposed between the main housing 10 and the puncture seat 41 is an annular elastic cord. As shown in fig. 3 and 4, a pair of elastic cord limiting portions 14 is disposed at a position close to the third limiting step 13 inside the main housing, and correspondingly, as shown in fig. 5, a pair of elastic cord limiting grooves 45 is disposed on the puncture base 41, and the elastic cord connects the puncture mechanism and the main housing together through the elastic cord limiting portions 14 and the elastic cord limiting grooves 45.

In this embodiment, a connection structure is provided between the indwelling mechanism 50 and the puncturing mechanism 40, and as shown in fig. 6, 8, 10, and 11, the connection structure includes a flange 513 provided on the outer side of the indwelling base and a catching portion 410 provided on the inner side of the lower end of the second catch 46 on the puncturing base, and the catching portion 410 is engaged with the flange 513 to connect the indwelling mechanism 50 and the puncturing mechanism 40 together.

The inactivated state of the application type hypodermic indwelling needle of the present embodiment is shown in fig. 1, and the use thereof is as follows:

step 1, tearing off a sealing sticker 30 at the upper end of a main shell 10;

step 2, separating the sealing cover 20 at the lower end of the main shell 10;

step 3, tearing off release paper on the surface of the bonding portion 5204;

step 4, lifting the puncture mechanism to the state shown in fig. 9 and fig. 10, wherein the indwelling mechanism and the puncture mechanism are in a state to be launched;

step 5, as the main shell body is a plastic piece and has certain deformability, the extrusion part 11 arranged on the main shell body oppositely is extruded until the first limit step 15 is separated from the second limit step 47, the puncture mechanism and the indwelling mechanism are launched to the state shown in fig. 7 and 8, at this time, the lower end of the indwelling soft needle enters the skin of the patient, and the bonding part 5204 is bonded with the skin of the patient;

step 6, removing the main shell and the puncture mechanism, and sticking and retaining the retaining mechanism on the skin of the patient;

step 7, as shown in fig. 13, the tip of the syringe without the steel needle is connected to the infusion joint of the indwelling mechanism at the time of injection to complete the injection.

Example two

The present embodiment is different from the first embodiment in the structure of the indwelling mechanism 50. In this embodiment, as shown in FIG. 12B, the indwelling needle 54 is directly and fixedly connected to the indwelling needle 51, and the indwelling needle and the indwelling soft needle communicate with each other through a check valve 518 as a one-way fluid flow means.

In conclusion, the above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An application type subcutaneous indwelling needle at least comprises an indwelling mechanism, a main shell (10) and a puncture mechanism (40) arranged in the main shell, and is characterized in that the indwelling mechanism at least comprises an indwelling seat (51), the upper end of the indwelling seat is provided with a transfusion connector (53), an indwelling steel needle (54) is arranged at the center of the transfusion connector, the lower end surface of the indwelling seat (51) is provided with a bonding part (5204), the lower end of the indwelling seat (51) is also provided with an indwelling soft needle (55) protruding out of the bonding part (5204), the indwelling soft needle (55) and the indwelling steel needle (54) are coaxially arranged, and a one-way liquid flow device is arranged between the indwelling steel needle (54) and the indwelling soft needle (55); the puncture mechanism at least comprises a puncture seat (41) and a puncture needle (44) arranged in the center of the puncture seat, and the puncture needle (44) penetrates through the remaining steel needle (54) and the remaining soft needle (55); puncture mechanism is equipped with elasticity firing mechanism (60) in the main casing body relative main casing body axial swing joint in the main casing body, puncture mechanism includes two extreme positions at least in the main casing body: a puncture position and a position to be launched; elasticity emission mechanism (60) are cyclic annular elasticity rope, main casing body inboard is equipped with a pair of elasticity rope spacing portion (14), be equipped with a pair of elasticity rope spacing groove (45) on the puncture seat, the elasticity rope links together puncture mechanism and main casing body through elasticity rope spacing portion (14) and elasticity rope spacing groove (45).

2. An applicator hypodermic needle according to claim 1, wherein said retaining steel needle (54) is fixedly arranged relative to the retaining base (51) and said one-way fluid means is a one-way valve (518).

3. An application type hypodermic indwelling needle according to claim 1, wherein the indwelling steel needle (54) is fixedly arranged on a steel needle holder (511), the steel needle holder (511) is movably arranged relative to the indwelling needle (51), and the steel needle holder (511) is movable in the axial direction of the indwelling steel needle (54).

4. An applicator type hypodermic indwelling needle according to claim 2, wherein the one-way flow means is a sealing plug (56) pierceable by a steel indwelling needle (54), and a compression return means (512) is provided between the steel needle holder (511) and the sealing plug (56).

5. An applicator subcutaneous indwelling needle according to claim 1, where a connecting structure is provided between the indwelling mechanism and the puncture mechanism.

6. The applicator-type hypodermic indwelling needle according to claim 1, wherein at least two sets of guiding and limiting mechanisms are provided between the puncture base and the main housing, the guiding and limiting mechanisms having a puncture position limiting part and a to-be-fired position limiting part.

7. An application type hypodermic indwelling needle according to claim 6, wherein the guiding and limiting mechanism comprises at least a first member (12) provided on the inner wall of the main housing and a second member (46) provided on the outer wall of the puncture base, the second member having elasticity; the first clamping piece comprises a group of clamping edges (17) which are arranged oppositely, a guide groove (16) which is matched with the second clamping piece is formed between the clamping edges, and guide grooves (48) which are matched with the clamping edges are arranged on two sides of the second clamping piece.

8. An application type hypodermic indwelling needle according to claim 7, wherein the first clamping member has a first limit step (15) at the upper end thereof, the second clamping member has a second limit step (47) at the upper end thereof adapted to the first limit step, and the first limit step and the second limit step cooperate with each other when the puncture mechanism is in the ready-to-fire position.

9. The application type hypodermic needle according to claim 7, wherein the lower end of the clamping edge is provided with a third limiting step (13), the inner part of the puncture seat near the upper end of the second clamping part is provided with a fourth limiting step (49) which is adapted to the three-phase limiting step, the puncture mechanism is in the puncture state, and the third limiting step is adapted to the fourth limiting step.

10. The applicator type hypodermic indwelling needle according to any one of claims 1 to 9, wherein the indwelling needle is provided with an indwelling chamber (58) at the upper end thereof, the infusion connector (53) is located in the indwelling chamber, a protective cover (70) is provided on the indwelling chamber, and a flexible portion (72) made of a flexible material is provided at the center of the protective cover (70).

11. An applicator hypodermic needle according to any one of claims 1-9, wherein the infusion connector is internally threaded and the infusion connector is provided with a plurality of notches (57) in its side wall.