Integrated indwelling needle and needle inserting device and infusion system thereof

Abstract

The invention provides an integrated remaining needle, a needle inserting device thereof and an infusion system, the integrated remaining needle comprises a soft needle and a hard needle, and the soft needle is sleeved on the periphery of the hard needle. The integrated remaining needle is adopted in the needle inserting device, and the needle inserting device is adopted in the infusion system. According to the scheme, the hard needle is sleeved with the soft needle, after the hard needle is inserted into the tissue, the soft needle can be inserted into the tissue of the human body together with the hard needle, the hard needle can be pulled out of the soft needle due to the fact that the soft needle is connected with the hard needle in a sleeved mode, and therefore the pain caused by the hard needle can be effectively reduced; the problem that pain is brought by an existing integrated hard needle is effectively solved, and meanwhile the problems of winding and mistaken touch caused by the fact that an infusion tube is externally arranged are solved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to an integrated indwelling needle, its needle insertion device and infusion system. Background Art

[0002] A hydraulic infusion pump sucks hydraulic liquid from a liquid reservoir based on a positive displacement micropump, pumps it into the liquid cavity of a hydraulic medicine reservoir, thereby pushing the piston of the hydraulic medicine reservoir forward, and then pushing the medicine liquid in the medicine cavity of the hydraulic medicine reservoir to be pumped out. The pumped-out medicine liquid needs to be infused into the human body through an indwelling needle.

[0003] The indwelling needles of patch-type hydraulic infusion pumps are mainly divided into two types: integrated hard needles and separable soft needles.

[0004] Soft needles usually adopt a separable type and require a separate medicine delivery hose. The external hose is easily detached or blocked due to external forces, and even when the pipeline is accidentally pulled, the patch-type hydraulic infusion pump will be pulled away from the human body, resulting in the product being unable to continue to be used or even damaged.

[0005] Therefore, an integrated hard needle is needed to solve the problems caused by the external pipeline.

[0006] For example, in the existing public patent CN119139577A, a medicine liquid supply device and its usage method, the integrated hard needle used in this patent has a relatively small volume for the hydraulic infusion pump. However, if the user moves, there will be a foreign body sensation and discomfort. Moreover, due to structural limitations, the integrated hard needle is generally set at the edge of the product. With the movement of the user, it is easy to cause the needle to detach or move up and down, causing pain to the user, and even the product cannot be used continuously after the needle detaches from the human body.

[0007] Therefore, the technical problem to be solved by this application is: how to reduce the pain caused by the integrated hard needle. Summary of the Invention

[0008] To solve the above technical problems, this application proposes an integrated indwelling needle, its needle insertion device and infusion system. This solution adopts the scheme of sleeving a soft needle outside the hard needle. When the hard needle penetrates into the tissue, the soft needle will be driven into the human tissue together. Since the soft needle and the hard needle are sleeved and connected, the hard needle can be pulled out from the soft needle, thereby effectively reducing the pain caused by the hard needle.

[0009] This application proposes an integrated indwelling needle, including a soft needle and a hard needle, and the soft needle is sleeved on the outer periphery of the hard needle.

[0010] At the same time, this application also proposes a needle insertion device including the above integrated indwelling needle.

[0011] Preferably, it further includes:

[0012] A housing assembly, the housing assembly having a chamber, and an opening communicating with the chamber being provided on the bottom surface of the housing assembly;

[0013] A propulsion assembly, the propulsion assembly being installed in the chamber;

[0014] A base assembly, the base assembly being used for installing the integrated indwelling needle, and the base assembly being installed on the output end of the propulsion assembly;

[0015] The opening is used to provide a moving channel for the base assembly.

[0016] Preferably, the propulsion assembly is an elastic structure.

[0017] Preferably, the propulsion assembly is installed in the chamber through a locking assembly, and the locking assembly has a locking portion and an unlocking opening;

[0018] A rotation adjustment structure for rotating and adjusting the propulsion assembly is provided in the housing assembly, for making the propulsion assembly engage with the locking portion or the unlocking opening;

[0019] The locking portion is used for locking the elastic structure in a compressed state;

[0020] The unlocking opening is used for releasing the elastic structure in a compressed state.

[0021] Preferably, the base assembly includes:

[0022] A soft needle base, a soft needle being installed at the lower end of the soft needle base, the soft needle base having a first medicine cavity for penetrating the needle hole of the soft needle, and a liquid medicine flow channel for communicating with the first medicine cavity being provided on the soft needle base, and an airtight rubber stopper for shielding the first medicine cavity being provided at the upper end of the soft needle base;

[0023] A hard needle base, the hard needle base being located above the soft needle base, and the hard needle base being used for installing the hard needle, the lower end of the hard needle passing through the airtight rubber stopper and the needle hole of the soft needle and extending below the soft needle, and the upper end of the hard needle base being connected to the lower end of the propulsion assembly.

[0024] In addition, the present application also proposes an infusion system including the above-mentioned needle insertion device.

[0025] Further, it further includes a main body and an attaching piece, the needle insertion device being installed on the main body, and the attaching piece being provided on the bottom surface of the main body;

[0026] A needle insertion port is provided on the main body, and the needle insertion port provides a moving channel for the soft needle of the needle insertion device.

[0027] Preferably, the needle insertion device is detachably mounted on the main body.

[0028] Preferably, the interior of the main body housing has a cavity, in which a liquid reservoir, a micropump, a medicine reservoir and a medicine outlet pipeline are provided. The liquid inlet end of the micropump communicates with the liquid reservoir, the liquid outlet end of the micropump communicates with the piston chamber of the medicine reservoir, and the second medicine chamber of the medicine reservoir is connected to the liquid medicine flow channel of the soft needle base through a medicine outlet flow channel assembly.

[0029] Preferably, the medicine outlet flow channel assembly includes a liquid outlet needle, a sealing rubber plug and a medicine outlet pipeline. A liquid outlet needle is provided at the medicine outlet of the medicine reservoir, a sealing rubber plug is provided at the input end of the medicine outlet pipeline, and the liquid outlet needle passes through the sealing rubber plug and communicates with the medicine outlet pipeline.

[0030] Preferably, the medicine reservoir has a second medicine chamber, and a liquid medicine detection assembly is connected in the second medicine chamber;

[0031] The liquid medicine detection assembly includes a circuit board and two electrode wires. One ends of the two electrode wires are electrically connected to the circuit board respectively, and the other ends of the two electrode wires are arranged at intervals in the medicine outlet flow channel assembly. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art.

[0033] Figure 1 is a schematic structural diagram of the integrated indwelling needle in Embodiment 1;

[0034] Figure 2 is a three-dimensional structural diagram of the needle insertion device in Embodiment 2;

[0035] Figure 3 is an internal structural diagram of the needle insertion device in Embodiment 2;

[0036] Figure 4 is a schematic diagram of the positional relationship between the lower housing and the propulsion assembly of the needle insertion device in Embodiment 2;

[0037] Figure 5 is a three-dimensional structural diagram of the upper housing of the needle insertion device in Embodiment 2;

[0038] Figure 6 is a three-dimensional view of the lower housing of Embodiment 2 from one perspective;

[0039] Figure 7 is a three-dimensional view of the lower housing of Embodiment 2 from another perspective;

[0040] Figure 8It is a schematic diagram of the positional relationship between the locking part and the unlocking port in Embodiment 2;

[0041] Figure 9 It is a schematic perspective view of the infusion system in Embodiment 3;

[0042] Figure 10 It is a schematic perspective view of the main unit in Embodiment 3;

[0043] Figure 11 It is a schematic diagram of the internal structure of the main unit in Embodiment 3;

[0044] Figure 12 It is a schematic diagram of the positional relationship between the soft needle base and the needle insertion port in Embodiment 3;

[0045] Figure 13 It is a schematic diagram of the positional relationship between the piston chamber and the second medicine chamber in Embodiment 3;

[0046] Figure 14 It is Figure 11 A partial enlarged structural schematic diagram at A in

[0047] The reference numerals involved in the drawings are as follows:

[0048] 1 - Needle insertion device; 2 - Locking assembly; 3 - Elastic locking component; 11 - Soft needle; 12 - Hard needle; 13 - Housing assembly; 14 - Opening; 15 - Pushing assembly; 16 - Base assembly; 17 - Locking part; 18 - Unlocking port; 19 - Soft needle base; 20 - First medicine chamber; 21 - Medicine liquid flow channel; 22 - Sealing rubber stopper; 23 - Hard needle base; 24 - Main unit; 25 - Attachment piece; 26 - Liquid storage device; 27 - Micro pump; 28 - Medicine storage device; 29 - Medicine outlet pipeline; 30 - Piston chamber; 31 - Second medicine chamber; 32 - Push rod part; 33 - Support part; 34 - Strip-shaped plate; 35 - Card interface; 36 - First spring; 37 - Upper housing; 38 - Lower housing; 39 - Guide seat; 40 - Insertion interface; 41 - Round opening; 42 - Strip-shaped opening; 43 - Clamping plate; 44 - Installation opening; 45 - Arc-shaped through opening; 46 - Guide plate; 47 - Limiting block; 48 - Pressing block; 49 - Second spring; 50 - Piston part; 51 - Clamping block part; 52 - Arc-shaped groove; 53 - Clamping groove; 54 - Circular groove; 55 - Needle insertion port; 56 - Buckle part; 57 - Card slot; 58 - Battery; 59 - Medicine adding port; 60 - Liquid outlet needle; 61 - Sealing rubber stopper; 62 - Medicine outlet. Detailed implementation manners

[0049] The technical solutions of the present application will be further described below in conjunction with specific embodiments, but the present application is not limited to these embodiments.

[0050] Embodiment 1

[0051] As Figure 1As shown in the figure, this embodiment proposes an integrated indwelling needle, which includes a soft needle 11 and a hard needle 12, and the soft needle 11 is sleeved on the outer periphery of the hard needle 12.

[0052] In this embodiment, a scheme of sleeving the soft needle 11 outside the hard needle 12 is adopted. When the hard needle 12 penetrates into the tissue, the soft needle 11 will be driven to penetrate into the human tissue together. Since the soft needle 11 and the hard needle 12 are sleeved and connected, the hard needle 12 can be pulled out from the soft needle 11, thereby effectively reducing the pain caused by the hard needle 12.

[0053] Embodiment 2

[0054] As Figures 2 to 8 shown in the figure, this embodiment proposes a needle insertion device 1 including the above integrated indwelling needle, where the indwelling needle is located at the middle position of the bottom surface of the needle insertion device 1.

[0055] The needle insertion device 1 further includes:

[0056] A housing assembly 13, the housing assembly 13 has a chamber, as Figure 7 shown in the figure, an opening 14 communicating with the chamber is provided on the bottom surface of the housing assembly 13;

[0057] A propulsion assembly 15, the propulsion assembly 15 is installed in the chamber;

[0058] A base assembly 16, the base assembly 16 is used to install the integrated indwelling needle, and the base assembly 16 is installed on the output end of the propulsion assembly 15;

[0059] The opening 14 is used to provide a moving channel for the base assembly 16.

[0060] In this solution, the propulsion assembly 15 is used to drive the base assembly 16 to move linearly, so as to drive the indwelling needle to penetrate into the human tissue.

[0061] Furthermore, the propulsion assembly 15 is an elastic structure.

[0062] Furthermore, the propulsion assembly 15 is installed in the chamber through a locking assembly 2, and the locking assembly 2 has a locking portion 17 and an unlocking port 18;

[0063] A rotation adjustment structure for rotating and adjusting the propulsion assembly 15 is provided in the housing assembly 13, so as to make the propulsion assembly 15 engage with the locking portion 17 or the unlocking port 18;

[0064] The locking portion 17 is used to lock the elastic structure in the compressed state;

[0065] The unlocking port 18 is used to release the elastic structure in the compressed state.

[0066] Further, the propulsion assembly 15 includes:

[0067] A push rod portion 32, the lower end of the push rod portion 32 is connected to the base assembly 16, and a support portion 33 is fixed on the peripheral surface of the push rod portion 32;

[0068] A strip plate 34, the strip plate 34 is fixed on the peripheral surface of the push rod portion 32, and a clamping interface 35 is provided at one end of the strip plate 34 away from the axis of the push rod portion 32; the clamping interface 35 is used to be clamped on the locking portion 17, or the clamping interface 35 is used to disengage the strip plate 34 from the unlocking port 18;

[0069] A first spring 36, the first spring 36 is sleeved on the outer periphery of the strip plate 34, and one end of the first spring 36 is used to abut against the locking assembly 2, and the other end of the first spring 36 is used to abut against the support portion 33.

[0070] Wherein the support portion 33 can be an annular plate, and an annular cylindrical shell is fixed at the edge of the annular plate, and the annular cylindrical shell is located on the outer periphery of the first spring 36.

[0071] Wherein, the number of the strip plates 34 is multiple and they are evenly distributed in a circumferential array with the axis of the push rod portion 32 as the reference.

[0072] In the initial state, the first spring 36 is in a compressed state, and at this time the clamping interface 35 is used to be clamped on the locking portion 17; when the push rod portion 32 is rotated so that the clamping interface 35 enters the unlocking port 18, under the action of the first spring 36, the entire adjustment plate slides downward along the unlocking port 18, which is used to drive the base assembly 16 to move downward, so as to insert the indwelling needle into the human tissue.

[0073] Further, the housing assembly 13 includes an upper housing 37 and a lower housing 38, and the upper housing 37 and the lower housing 38 are rotatably connected.

[0074] Further, the structure for rotating and adjusting the push rod portion 32 in this solution is as follows:

[0075] A guide seat 39 is fixed in the inner cavity of the upper housing 37, and an insertion interface 40 is provided in the guide seat 39. The push rod portion 32 and the strip plate 34 are movably installed in the insertion interface 40 along the vertical direction, and the insertion interface 40 is used to limit the rotation of the push rod portion 32, so that the push rod portion 32 rotates synchronously with the upper housing 37, achieving the purpose of rotation adjustment.

[0076] The insertion interface 40 includes a circular opening 41 and a strip-shaped opening 42. The circular opening 41 is used to install the push rod portion 32, and the strip-shaped opening 42 is used to install the strip plate 34.

[0077] Among them, the number of the strip-shaped openings 42 is multiple, and the multiple strip-shaped openings 42 are evenly distributed in a circumferential array with the axis of the circular opening 41 as the reference.

[0078] Furthermore, the number of the strip-shaped openings 42 is the same as the number of the strip-shaped plates 34.

[0079] Furthermore, the locking assembly 2 includes:

[0080] A clamping plate 43, the clamping plate 43 is fixed on the top of the lower housing 38, the clamping plate 43 has a mounting opening 44 for passing through the push rod portion 32, and one end of the clamping plate 43 close to the mounting opening 44 forms a locking portion 17.

[0081] And the unlocking opening 18 is opened on the clamping plate 43, and the unlocking opening 18 communicates with the mounting opening 44.

[0082] As an implementation manner of this embodiment, an arc-shaped through opening 45 is provided on the clamping plate 43.

[0083] A guide plate 46 is fixed on the inner wall of the top cover of the upper housing 37. The lower end of the guide plate 46 passes through the arc-shaped through opening 45 and extends to the lower part of the clamping plate 43. A limiting block 47 is provided at the lower end of the guide plate 46, and the limiting block 47 is attached to the lower surface of the clamping plate 43.

[0084] Furthermore, the end of the first spring 36 abuts against the clamping plate 43.

[0085] As an implementation manner of this embodiment, an elastic locking component 3 is provided between the clamping plate 43 and the upper housing 37, and the elastic locking component 3 is used to lock the upper housing 37 and the lower housing 38.

[0086] Furthermore, the elastic locking component 3 includes a pressing block 48, and the pressing block 48 is installed on the guide seat 39 through a second spring 49.

[0087] A pressing block 48 is provided on the side wall of the upper housing 37.

[0088] A clamping block portion 51 is provided at the bottom of the pressing block 48.

[0089] An arc-shaped groove 52 and a clamping groove 53 are provided on the upper surface of the clamping plate 43. The clamping groove 53 is arranged along the radial direction of the lower housing 38. One end of the clamping groove 53 close to the axis of the lower housing 38 communicates with the arc-shaped groove 52, and the clamping groove 53 is located at the end of the arc-shaped groove 52.

[0090] The engaging groove 53 is used to restrict the circumferential movement of the engaging block portion 51, and the pressing block 48 is used to drive the engaging block portion 51 into the arc-shaped groove 52. At this time, the rotation of the upper housing 37 is facilitated.

[0091] In the initial state, under the action of the second spring 49, the engaging block portion 51 is located in the engaging groove 53. Manually press the pressing block 48. At this time, the second spring 49 contracts, and the engaging block portion 51 enters the arc-shaped groove 52. Manually rotate the upper housing 37. Under the action of the upper housing 37, the engaging block portion 51 moves in the arc-shaped groove 52.

[0092] Furthermore, a circular groove 54 for installing the second spring 49 is provided on the side surface of the guiding seat 39.

[0093] In this embodiment, the number of arc-shaped grooves 52 is two, and the number of arc-shaped through openings 45 is two. The centers of the circles where the arc-shaped grooves 52 and the arc-shaped through openings 45 are located coincide with the axis of the upper housing 37.

[0094] As an implementation manner of this embodiment, the base assembly 16 includes:

[0095] A soft needle base 19. A soft needle 11 is installed at the lower end of the soft needle base 19. The soft needle base 19 has a first medicine cavity 20 for penetrating the needle hole of the soft needle 11, and a liquid medicine flow channel 21 for communicating with the first medicine cavity 20 is provided on the soft needle base 19. A sealing rubber plug 22 for shielding the first medicine cavity 20 is provided at the upper end of the soft needle base 19;

[0096] A hard needle base 23. The hard needle base 23 is located above the soft needle base 19, and the hard needle base 23 is used to install the hard needle 12. The lower end of the hard needle 12 passes through the sealing rubber plug 22 and the needle hole of the soft needle 11 and extends below the soft needle 11. The upper end of the hard needle base 23 is connected to the lower end of the push rod portion 32.

[0097] Embodiment 3

[0098] As Figures 2 to 13 shown, this embodiment proposes an infusion system including the needle insertion device 1 of Embodiment 2.

[0099] The infusion system further includes a main unit 24 and an attachment piece 25. The needle insertion device 1 is installed on the main unit 24, and the attachment piece 25 is provided on the bottom surface of the main unit 24;

[0100] A needle insertion port 55 is provided on the main unit 24, and the needle insertion port 55 provides a moving channel for the soft needle 11 of the needle insertion device 1.

[0101] Among them, the indwelling needle is located in the middle position of the main unit 24. This solves the problem that users are prone to a foreign body sensation and discomfort when wearing the indwelling rigid needle 12 during activities. Compared with the prior art solution where the needle insertion is at the edge, this solution is more stable, can effectively reduce the movement of the indwelling needle in the body, thereby reducing discomfort, ensuring the reliability of product application, and protecting the personal safety of users.

[0102] As an implementation manner of this embodiment, the needle insertion device 1 is detachably installed on the main unit 24. Further, the needle insertion device 1 and the main unit 24 are snap-connected. A snap portion 56 is provided at the lower end of the needle insertion device 1, and a card slot 57 for installing the snap portion 56 is provided on the main unit 24. The snap portion 56 and the card slot 57 can be rotationally engaged, or other forms of snap connection in the prior art can be adopted.

[0103] As an implementation manner of this embodiment, the interior of the housing of the main unit 24 has a cavity, and a liquid reservoir 26, a micropump 27, a medicine reservoir 28, and a medicine outlet pipeline 29 are provided in the cavity. Among them, a piston portion 50 in the medicine reservoir 28 divides the internal space of the medicine reservoir 28 into a piston chamber 30 and a second medicine chamber 31.

[0104] The liquid inlet end of the micropump 27 is communicated with the liquid reservoir 26, the liquid outlet end of the micropump 27 is communicated with the piston chamber 30 of the medicine reservoir 28, and the second medicine chamber 31 of the medicine reservoir 28 is connected to the liquid medicine flow channel 21 of the soft needle base 19 through a medicine outlet flow channel assembly.

[0105] The liquid reservoir 26 is provided with a separate liquid reservoir chamber and a waterproof and breathable hole. A rubber plug is provided on the waterproof and breathable hole. During the sterilization and storage processes, it is in a sealed state, and only during user use can it be breathable, ensuring the pressure balance inside and outside the medicine reservoir and isolating it from other electrical components to prevent the liquid reservoir from leaking and damaging other components.

[0106] In this solution, the liquid reservoir 26 is located inside the main unit 24, eliminating the need for an external infusion pipeline, solving the problem that an external infusion pipeline is prone to winding and accidental contact, and ensuring the reliability of the product.

[0107] Further, the micropump 27 is a positive displacement micropump 27.

[0108] As an implementation manner of this embodiment, a medicine adding port 59 communicating with the second medicine chamber 31 is provided on the housing of the main unit 24. A rubber plug is provided on the medicine adding port 59, and the needle tip of an external injection needle passes through the rubber plug of the medicine adding port 59 to add medicine to the second medicine chamber 31.

[0109] As an implementation manner of this embodiment, a battery 58 is also provided in the cavity.

[0110] Further, a controller and a liquid-electric switch are also provided on the host 24. The battery 58 is used for power supply, and the controller controls the operation of the micropump 27 through the liquid-electric switch.

[0111] Further, as Figure 14 shown, the drug outflow channel assembly includes a liquid outlet needle 60, a sealing rubber plug 61, and a drug outlet pipeline 29. The liquid outlet needle 60 is provided at the drug outlet 62 of the drug storage device 28. The input end of the drug outlet pipeline 29 is provided with a sealing rubber plug 61. The liquid outlet needle 60 passes through the sealing rubber plug 61 and is communicated with the drug outlet pipeline 29.

[0112] As an implementation manner of this embodiment, the drug storage device 28 has a second drug chamber 31, and a liquid medicine detection assembly is connected in the second drug chamber 31. The liquid medicine detection assembly is used to detect whether the liquid medicine in the soft needle 11 is full;

[0113] The liquid medicine detection assembly includes a circuit board and two electrode wires. One ends of the two electrode wires are respectively electrically connected to the circuit board, and the other ends of the two electrode wires are arranged at intervals in the drug outflow channel assembly.

[0114] Working principle: In the initial state, one ends of the two electrode wires are connected to the circuit board, and the other ends are far away from each other, and a circuit path cannot be formed; when the liquid medicine is full, a circuit path is formed between the two electrode wires due to the weak conductivity of the liquid medicine. By detecting the presence or absence of current between the two electrode wires, it can be determined whether the liquid medicine is full. However, after the electrode wires are installed in the drug outlet pipeline 29 of the drug outflow channel assembly, there is still a cavity between the electrode wires and the soft needle 11 in the direction of liquid outflow, and the volume of this part is a fixed value. Then, the appearance time of the filling reminder can be compensated by an algorithm, that is, it can be ensured that the liquid medicine is full between the second drug chamber 31 of the drug storage device 28 and the soft needle 11.

[0115] The working principle of this embodiment:

[0116] Initial state: The needle insertion device 1 is in the energy storage state, the hard needle base 23 and the push rod part 32 are rotationally buckled and fixed, the needle insertion device 1 is rotationally buckled and connected with the host 24, and the liquid medicine flow channel 21 on the soft needle base 19 is connected with the drug outlet pipeline 29 of the drug storage device 28.

[0117] Before use stage: The user adds liquid medicine to the second drug chamber 31 of the drug storage device 28 through the rubber plug on the fuel filling port with a syringe, and presses the liquid-electric switch. After the medicine adding and self-starting procedures are completed, the host 24 is attached to the surface of the human tissue through the attachment piece 25.

[0118] Needle insertion stage: Manually press the pressing block 48. At this time, the second spring 49 contracts, and the clamping block portion 51 enters the arc-shaped groove 52. Manually rotate the upper housing 37; the clamping interface 35 on the strip plate 34 moves from the locking portion 17 to the unlocking port 18. Under the action of the first spring 36, the push rod portion 32 drives the base assembly 16 to move downward, thereby piercing the hard needle 12 and the soft needle 11 into the human tissue together.

[0119] Rotate the needle insertion device 1 in the reverse direction so that the buckle portion 56 of the needle insertion device 1 is disengaged from the card slot 57 of the main unit 24, and then the hard needle base 23 and the hard needle 12 can be synchronously taken out, leaving the soft needle 11 in the human body. The user can install the dust-proof and waterproof cover included with the product on the needle insertion port 55 of the main unit 24 to make the needle insertion port 55 waterproof and dust-proof.

[0120] Usage stage: After the user sets the pumping plan and turns on the device again, the micropump 27 continuously pumps the driving liquid in the liquid reservoir 26 into the piston chamber 30 of the medicine reservoir 28, pushing the piston forward, and then pushing the liquid medicine along the medicine outlet pipeline 29 and the liquid medicine flow channel 21 into the needle hole of the soft needle 11, thereby realizing the infusion function.

[0121] For those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention.

Claims

1. An integrated indwelling needle, characterized in that: It comprises a soft needle (11) and a hard needle (12), wherein the soft needle (11) is sleeved on the outer circumference of the hard needle (12).

2. A needle insertion device, characterized in that: Comprising the integrated indwelling needle as described in claim 1.

3. The needle insertion device according to claim 2, characterized in that: Also includes: A housing component (13), the housing component (13) having a chamber, and a bottom surface of the housing component (13) having an opening (14) penetrating the chamber; a propulsion assembly (15), the propulsion assembly (15) being installed in the chamber; A base assembly (16), the base assembly (16) being used to mount the integrated indwelling needle, and the base assembly (16) being mounted on the output end of the propulsion assembly (15); The opening (14) is used to provide a movement passage for the base assembly (16).

4. The needle insertion device according to claim 3, characterized in that: The propulsion component (15) is an elastic structure.

5. The needle insertion device according to claim 4, characterized in that: The propulsion assembly (15) is installed in the chamber via a locking assembly (2), wherein the locking assembly (2) has a locking portion (17) and an unlocking port (18); The housing assembly (13) is provided with a rotation adjustment structure for rotationally adjusting the propulsion assembly (15), so as to enable the propulsion assembly (15) to engage with the locking portion (17) or the unlocking port (18); The locking portion (17) is used to lock the elastic structure in a compressed state; The unlocking opening (18) is used to release the elastic structure in a compressed state.

6. The needle insertion device according to claim 3, characterized in that: The base assembly (16) comprises: A soft needle base (19), wherein a soft needle (11) is mounted at the lower end of the soft needle base (19), the soft needle base (19) has a first medicine cavity (20) for penetrating the needle hole of the soft needle (11), and the soft needle base (19) is provided with a medicine liquid flow channel (21) for communicating with the first medicine cavity (20), and the upper end of the soft needle base (19) is provided with a sealed rubber plug (22) for shielding the first medicine cavity (20); A hard needle base (23), wherein the hard needle base (23) is located above the soft needle base (19), and the hard needle base (23) is used to install the hard needle (12), the lower end of the hard needle (12) passes through the needle hole of the sealed rubber plug (22) and the soft needle (11), and extends to the bottom of the soft needle (11), and the upper end of the hard needle base (23) is connected to the lower end of the propulsion assembly (15).

7. An infusion system, characterized in that: It comprises the needle insertion device according to any one of claims 2 to 6.

8. The infusion system according to claim 7, characterized in that: It also comprises a main unit (24) and an attachment sheet (25), wherein the needle insertion device (1) is installed on the main unit (24), and the attachment sheet (25) is arranged on the bottom surface of the main unit (24); The host (24) is provided with a needle insertion port (55), and the needle insertion port (55) provides a moving channel for the soft needle (11) of the needle insertion device (1).

9. The infusion system according to claim 8, characterized in that: The needle insertion device (1) is detachably mounted on the host machine (24).

10. The infusion system according to claim 8, characterized in that: The housing of the host (24) has a cavity inside, in which a liquid reservoir (26), a micro pump (27), a drug reservoir (28) and a drug outlet pipeline (29) are arranged, the liquid inlet end of the micro pump (27) is connected to the liquid reservoir (26), the liquid outlet end of the micro pump (27) is connected to the piston cavity (30) of the drug reservoir (28), and the second drug cavity (31) of the drug reservoir (28) is connected to the drug liquid flow channel (21) of the soft needle base (19) through a drug outlet flow channel component.

11. The infusion system according to claim 10, characterized in that: The drug outlet flow channel assembly comprises a liquid outlet needle (60), a sealing rubber plug (61) and a drug outlet pipeline (29); the drug outlet port (62) of the drug storage device (28) is provided with a liquid outlet needle (60); the input end of the drug outlet pipeline (29) is provided with a sealing rubber plug (61); the liquid outlet needle (60) passes through the sealing rubber plug (61) and is in communication with the drug outlet pipeline (29).

12. The infusion system according to claim 11, characterized in that: The drug storage device (28) has a second drug cavity (31), and a drug liquid detection component is connected to the second drug cavity (31); The drug liquid detection component includes a circuit board and two electrode wires, one end of the two electrode wires is electrically connected to the circuit board respectively, and the other ends of the two electrode wires are arranged in the drug outlet channel component at intervals.

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