Syringe

Abstract

The injector comprises a main machine module and an injection module, the lower end of the main machine module is provided with a containing space with a downward opening, the injection module is detachably installed in the containing space, and an injection needle is installed on the injection module. According to the scheme, the host module and the injection module are designed into a split type, the host module can be reused, the injection module is designed into a disposable mode, the host module can be reused by disassembling and replacing the injection module, and the use cost of equipment is remarkably reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical apparatus and instruments, and particularly relates to a syringe. BACKGROUND

[0002] In the prior art, a hand-push syringe or a screw rod type syringe cannot realize infusion of small pill doses of liquid medicine due to the precision of the structure thereof; or in order to achieve input of small pill doses of liquid medicine, the liquid medicine needs to be diluted, thereby causing damage to the skin at the injection site, and in addition, there may be precipitates in the diluted liquid, thereby being not conducive to absorption of the effective components of the liquid medicine.

[0003] It is difficult for the hand-push syringe or the screw rod type syringe to achieve the requirement of high-density injection in a small area through back-and-forth injection, and it is difficult to effectively control the point of infusion.

[0004] Due to the influence of increased pressure caused by blockage or agglomeration when the hand-push syringe or the screw rod type syringe receives input liquid from an injection object, it is difficult to realize high-precision infusion within the outlet pressure range of 0-16 psi.

[0005] Based on the above problems, some hydraulic delivery schemes appear in the prior art, such as a medical infusion system with the application number 202410739030.8 and the name thereof, which comprises a shell, a medicine storage device, a driving liquid device, a volumetric micropump, a liquid path communication assembly and a controller, the liquid path communication assembly is arranged between the suction end of the volumetric micropump and the liquid outlet end of the driving liquid device, and the liquid path communication assembly is used to control the on-off between the suction end of the volumetric micropump and the liquid outlet end of the driving liquid device; in the scheme, the driving module, the medicine storage device module, the control module and the shell of the syringe are an integral whole, and the whole syringe after use can only be discarded.

[0006] Therefore, the technical problem to be solved by the present application is how to improve the structure of the syringe, so that part of the structure of the syringe can be reused. UTILITY MODEL CONTENT

[0007] To solve the above technical problems, the utility model provides a syringe, in the scheme, the host module and the injection module are designed in a split type, the host module can be reused, the injection module is designed in a disposable manner, and through disassembly and replacement of the injection module, reuse of the host module can be preserved.

[0008] Specifically, the utility model provides a syringe, which comprises a host module and an injection module, the lower end of the host module is provided with an accommodation space with an opening facing downward, the injection module is detachably installed in the accommodation space, and an injection needle is installed on the injection module.

[0009] Preferably, the injection module comprises a drug liquid storage and a first pump, and the first pump is used to deliver the liquid in the drug liquid storage to the injection needle.

[0010] Preferably, the injection module comprises a driving module and a drug storage module, the drug storage module has an injection cavity, a seal driving part is slidably installed in the injection cavity, the seal driving part divides the injection cavity into a driving chamber and a drug liquid storage chamber, the drug storage module is provided with a drug outlet through the drug liquid storage chamber, and the injection needle is installed on the drug outlet.

[0011] The driving module is used to deliver a driving medium into the driving chamber.

[0012] Preferably, the driving module has a driving medium storage and a second pump, and the second pump is used to deliver the driving medium in the driving medium storage into the driving chamber.

[0013] Preferably, the drug storage module has an end cover for shielding the injection cavity, and the end cover is provided with a flow channel through the driving chamber.

[0014] Preferably, a port at one end of the flow channel is provided with a first rubber plug, another port of the flow channel is provided with a second rubber plug, and a middle part of the flow channel is through the driving chamber.

[0015] Preferably, an outlet needle is installed on an outlet of the second pump, the outlet needle passes through the first rubber plug and is through the flow channel, and a discharge valve is detachably installed on the second rubber plug.

[0016] Preferably, the drug storage module is provided with a drug adding port through the drug liquid storage chamber, and a third rubber plug is installed on the drug adding port.

[0017] Preferably, a position adjusting device is installed on an inner wall of the containing space, and the position adjusting device is used to adjust the position of the injection module.

[0018] Preferably, the position adjusting device is a three-axis module.

[0019] Or, the position adjusting device is a two-axis module; or, the position adjusting device is a one-axis module.

[0020] Further, the first pump and the second pump adopt a volumetric micropump.

[0021] Further, the seal driving part can adopt a piston or an elastic diaphragm.

[0022] Beneficial effects:

[0023] 1) This scheme uses a positive displacement micropump as a driver, which can achieve ultra-low pill dose injection.

[0024] 2) This scheme adopts hydraulic drive mode, which uses the incompressible characteristics of liquid to ensure the pumping accuracy under 0-16 psi.

[0025] 3) The injection module is designed to be detachable, so that the host module can be reused, which significantly reduces the user's use cost.

[0026] 4) The position adjusting device is provided in this scheme, which can accurately control the injection position of the injection needle to achieve high-density injection in a small area.

[0027] 5) The injection module and the host module are connected through PIN pins, which realizes the transmission of power control signals.

[0028] 6) Elastic film can be used instead of the piston in the hydraulic drug reservoir, which is used to divide the liquid cavity and the drug cavity. When the volume of the driving liquid in the liquid cavity increases, the elastic film deforms and protrudes into the drug cavity, thereby pushing the drug liquid in the drug cavity out of the front needle.

[0029] 7) It is provided with a display screen, which can display the product state, and the screen can also set the pumping plan, and the single injection dose and the number of injection points can be set. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows.

[0031] Figure 1 is a structural schematic view of the injector in embodiment 1;

[0032] Figure 2 is an exploded view between the injection module and the luer needle in embodiment 1;

[0033] Figure 3 is a structural schematic view of the injector in embodiment 2;

[0034] Figure 4 is an exploded view between the injection module and the luer needle in embodiment 2;

[0035] Figure 5 is a structural schematic view of the driving module in embodiment 2;

[0036] Figure 6 is a structural schematic view of the drug reservoir module in embodiment 2;

[0037] Figure 7 is a structural schematic view of the host module in embodiment 3;

[0038] Figure 8 is a structural schematic diagram of a first embodiment of the position adjusting device in the host module in Example 4;

[0039] Figure 9 is a structural schematic diagram of a second embodiment of the position adjusting device in the host module in Example 4;

[0040] Figure 10 is a schematic diagram of the control relationship on the host module.

[0041] In the drawings, the reference signs involved are as follows:

[0042] 11 - host module; 12 - injection module; 13 - containing space; 14 - luer needle; 15 - first PIN pin adapter; 16 - second PIN pin adapter; 17 - guide part; 18 - screen; 19 - control circuit board; 20 - dosing button; 21 - power switch; 22 - battery; 23 - charging port; 24 - drug liquid storage; 25 - first pump; 26 - first liquid path switch; 27 - needle adapter; 28 - drive module; 29 - drug storage module; 30 - guide protrusion; 31 - limiting groove; 32 - sealing drive part; 33 - drive chamber; 34 - drug liquid storage chamber; 35 - drug outlet; 36 - drive medium storage; 37 - second pump; 38 - end cover; 39 - flow channel; 40 - first rubber plug; 41 - second rubber plug; 42 - liquid outlet needle; 43 - exhaust valve; 44 - liquid inlet needle; 45 - second liquid path switch; 46 - vertical slide rail assembly; 47 - horizontal slide rail assembly; 48 - third rubber plug. DETAILED DESCRIPTION

[0043] The technical solutions of the present application will be further described below in combination with specific embodiments, but the present application is not limited to these embodiments.

[0044] Example 1

[0045] As shown in Figure 1 and Figure 2 , the present embodiment proposes an injector, which comprises a host module 11 and an injection module 12, the lower end of the host module 11 is provided with a containing space 13 with an opening downward, the injection module 12 is detachably installed in the containing space 13, and an injection needle is installed on the injection module 12. Among them, the injection needle adopts a luer needle 14.

[0046] In the present scheme, the host module 11 and the injection module 12 are designed in a split type, the host module 11 can be reused, and the injection module 12 is designed in a disposable manner, by detaching and replacing the injection module 12, the reuse of the host module 11 can be preserved.

[0047] Further, the accommodating space 13 is provided with a first PIN pin adapter plate 15, and the top of the injection module 12 is provided with a second PIN pin adapter plate 16.

[0048] Further, the top of the injection module 12 is further provided with a guide part 17, and the main machine module 11 is provided with a guide groove for inserting and mounting the guide part 17, for guiding and aligning with the main machine module 11, and the injection module 12 and the main machine module 11 can be connected by buckling, magnetism, insertion or bolt connection, etc., to ensure that the injection module 12 can be disassembled and replaced.

[0049] In order to improve the use experience of the equipment, the shell of the main machine module 11 is provided with a screen 18, a control circuit board 19, a dosing button 20, a power switch 21, a battery 22 and a charging port 23, etc.

[0050] As shown in the figure, Figure 10 The power switch 21 provides a power-on instruction to the circuit board 19. The circuit board 19 provides power supply and signal instruction to the screen. The dosing button 20 provides a dosing instruction to the circuit board 19. The circuit board 19 provides power supply and control instruction to the position adjusting device. The circuit board 19 provides power supply and control signal to the first PIN pin adapter plate.

[0051] In the scheme, the injection module 12 is as follows:

[0052] The injection module 12 comprises a liquid medicine reservoir 24 and a first pump 25, and the first pump 25 is used to deliver the liquid in the liquid medicine reservoir 24 to the injection needle.

[0053] Further, the inlet end of the first pump 25 is connected with the liquid medicine reservoir 24 through a first liquid path switch 26, and the outlet of the first pump 25 is connected with the injection needle through a needle adapter 27.

[0054] Further, the first pump 25 adopts a volumetric micropump. By using the ultra-low pill dosage feature of 0.2 microliters / 0.1 microliters of the volumetric micropump, ultra-low pill dosage injection is realized.

[0055] The working process of the embodiment is as follows:

[0056] Firstly, liquid medicine is added to the liquid medicine reservoir 24;

[0057] Secondly, the user rotates the luer needle 14 to the luer interface of the injection module 12;

[0058] Thirdly, the injection module 12 is integrally installed into the accommodating space 13 of the main machine module 11;

[0059] Fourth step, turn on the power switch 21 and the first liquid circuit switch 26. The first pump 25 will automatically start pumping the medicine, and the air inside the first pump 25 and the needle adapter 27 will be purged.

[0060] Fifth step, set the pumping plan on screen 18 and place it at the location where infusion is needed, turn on the drug delivery button 20, and pump 25 will start working according to the pumping plan;

[0061] Step 6: After pumping is complete, remove the entire injection module 12 and discard it.

[0062] This embodiment has a simple structure and is easy to operate. It can deliver low-dose medicine with high precision at 0-16psi. At the same time, the main unit module 11 is reusable, which reduces the user's operating costs.

[0063] Example 2

[0064] like Figures 3 to 6 As shown, the installation method of the injection module 12 in the accommodating space 13 is the same in both Embodiment 1 and Embodiment 2. The difference between Embodiment 1 and Embodiment 2 is that the driving method and injection method of the injection module 12 have been improved. In this embodiment, the injection module 12 is designed as a split two-part unit, as detailed below:

[0065] The injection module 12 includes a drive module 28 and a drug reservoir module 29. The drug reservoir module 29 is provided with a guide protrusion 30, and the drive module 28 is provided with a limiting groove 31 for mounting the guide protrusion 30. In addition, the drug reservoir module 29 and the drive module 28 can be connected by means of snap-fit ​​connection, magnetic connection, adhesive, plug-in connection or bolt connection.

[0066] In this design, the injection module 12 is designed as two separate parts, which makes the production and processing simpler and more convenient.

[0067] The drug reservoir module 29 has an injection chamber, in which a sealing drive unit 32 is slidably installed. The sealing drive unit 32 divides the injection chamber into a drive chamber 33 and a drug storage chamber 34. The drug reservoir module 29 is provided with a drug outlet 35 that communicates with the drug storage chamber 34. The injection needle is installed on the drug outlet 35. The drug outlet 35 is a Luer interface.

[0068] The sealing drive unit 32 can be a piston or an elastic diaphragm. The working principle of the piston is existing technology and will not be described in detail here. The working principle of the elastic diaphragm is as follows: as the liquid in the drive chamber 33 increases, the elastic diaphragm bulges towards the liquid storage chamber 34, thereby pushing the liquid out.

[0069] The drive module 28 is used to deliver the drive medium into the drive chamber 33.

[0070] Further, the driving medium adopts driving liquid. Further, the driving liquid adopts oxygen-free pure water.

[0071] Further, the driving module 28 has a driving medium storage 36 and a second pump 37 for delivering the driving medium in the driving medium storage 36 to the driving chamber 33.

[0072] Further, the drug storage module 29 has an end cover 38 for shielding the injection chamber, the end cover 38 is provided with a flow channel 39, the flow channel 39 is through the driving chamber 33. The port at one end of the flow channel 39 is provided with a first rubber plug 40, the other port of the flow channel 39 is provided with a second rubber plug 41, a part of the flow channel 39 is through the driving chamber 33.

[0073] Further, the outlet of the second pump 37 is provided with an outlet needle 42, the outlet needle 42 is through the first rubber plug 40 and the flow channel 39; the second rubber plug 41 is detachably provided with an exhaust valve 43. The inlet of the second pump 37 is provided with an inlet needle 44, the inlet needle 44 is connected with the driving medium storage 36 through a second liquid path switch 45.

[0074] The second liquid path switch 45 is used for controlling the liquid path connection between the driving medium storage 36 and the second pump 37, when the second liquid path switch 45 is opened, the liquid in the driving medium storage 36 also enters the second pump 37 along the pipeline, avoiding the damage of the second pump 37 caused by the long-term accumulation of the driving liquid at the inlet end of the second pump 37.

[0075] In the scheme, with the continuous pumping of the second pump 37, the pressure in the liquid cavity continues to increase, the pressure sensor attached to the second pump 37 will feedback the pressure value to the control circuit, when reaching the critical point, the user is reminded to remove the exhaust valve 43 on the screen 18 through software control, under the action of the second rubber plug 41, the flow channel 39 can still be sealed, the second rubber plug 41 on the end cover 38 can seal the liquid in the flow channel 39, preventing the leakage of the liquid.

[0076] Further, the second pump 37 adopts a positive displacement micropump. Using a positive displacement micropump as a driver, using the characteristics of 0.2 microliters / 0.1 microliters of ultra-low pill dose of the micro positive displacement pump, realizing the injection of ultra-low pill dose, and the drug does not pass through the pump cavity of the micro positive displacement pump, and does not change in nature because of the pressure and lifting in the process of repeated volume change of the micro pump cavity, without drug compatibility risk.

[0077] In the scheme, the hydraulic driving seal driving part 32 is driven to move, so that the drug liquid in the drug liquid storage cavity can flow out of the injection needle.

[0078] As an embodiment of the present embodiment, the drug reservoir module 29 is provided with a drug adding port penetrating the drug storage chamber 34, and the third rubber plug 48 is installed on the drug adding port. The external drug solution can be pierced by a needle and pass through the third rubber plug 48, so that the drug storage chamber 34 can be added with drug.

[0079] The workflow of the present embodiment is as follows:

[0080] 1) In the initial state, the drive module 28 and the drug reservoir module 29 are assembled together;

[0081] 2) The preparation process before use includes the following steps:

[0082] Step 2.1, the user rotates the luer needle 14 to the luer interface of the drug reservoir module 29;

[0083] Step 2.2, connect the drive module 28 to the external power supply, press the second liquid path switch 45 at the same time, the second pump 37 starts to pump the drive liquid, and the residual gas in the second pump 37 and the flow channel 39 is discharged outward through the exhaust valve 43;

[0084] Step 3.3, the control software judges whether the exhaust of the flow channel 39 is completed by detecting the pressure value of the outlet end of the second pump 37, when the exhaust is completed, the second pump 37 stops pumping, and the user is reminded to pull out the exhaust valve 43 through the screen 18 display or other prompt mode;

[0085] Step 3.4, place the drug reservoir module 29 vertically, and add drug to the drug storage chamber 34 through the drug adding port provided with the third rubber plug 48, when a drop of drug solution appears at the head end of the luer needle 14, it is judged that the drug cavity has been filled with drug solution, and the drug adding has been completed;

[0086] Step 3.5, the injection module 12 is installed into the accommodating space 13 at the lower end of the main machine module 11 through the limiting guide part 17, at this time, the electrical connection between the injection module 12 and the main machine module 11 is completed through the first PIN needle adapter plate 15 and the second PIN needle adapter plate 16;

[0087] 3) The use includes the following steps:

[0088] Step 3.1, turn on the power switch 21;

[0089] Step 3.2, set the pumping plan on the screen 18;

[0090] Step 3.3, open the protective cover of the luer needle 14, and place the whole machine product in a suitable position for injection on the skin to be injected;

[0091] Step 3.4: Press the drug administration button 20 to restart pump 37, allowing for the infusion of a certain volume of medication. Alternatively, after the infusion is complete, the control software can use commands to drive the Luer needle 14 to make minute displacements, thereby achieving high-density injection in a small area.

[0092] Step 3.5: After the infusion is completed, remove the entire injection module 12 and discard it.

[0093] Example 3

[0094] This embodiment improves upon embodiment 1 or 2 by modifying the position adjustment method of the injection module 12. The injection module 12 adopts a non-adjustable form, such as... Figure 7 As shown, the injection module 12 is directly installed on the inner wall of the accommodating space 13.

[0095] Example 4

[0096] Based on Embodiment 1 or 2, this embodiment improves the position adjustment method of the injection module 12. The injection module 12 is adjustable. At this time, a position adjustment device is installed on the inner wall of the accommodating space 13, and the injection module 12 is detachably installed on the output end of the position adjustment device in the accommodating space 13.

[0097] The position adjustment device is used to adjust the position of the injection module 12. In this solution, the position adjustment device can adjust the position of the injection needle, effectively control the infusion point, and thus achieve the requirement of high-density injection in a small area.

[0098] As one embodiment of Example 4, the position adjustment device is a three-axis module, wherein the three-axis module is the prior art, and the injection module 12 can be directly installed on the output end of the three-axis module.

[0099] As one embodiment of Example 4, the position adjustment device is a two-axis module. In this case, the position adjustment device has a vertical adjustment module and a horizontal adjustment module on the horizontal plane. Furthermore, the two-axis module is existing technology, and its structure will not be described in detail. Figure 9 As shown, the inner wall of the accommodating space 13 is equipped with a vertical slide rail assembly 46 and a horizontal slide rail assembly 47 for assisting the movement of the injection module 12.

[0100] As one embodiment of Example 4, the position adjustment device is a single-axis module. In this case, the position adjustment device has a vertical adjustment module for vertical adjustment of the injection needle. Furthermore, single-axis modules are existing technology, and their structure will not be described in detail. Figure 8 As shown, a vertical slide rail assembly 46 for assisting the movement of the injection module 12 is installed on the inner wall of the accommodating space 13.

[0101] It is obvious that for the person skilled in the art, without departing from the scope of the present invention, several modifications and improvements can be made, which are all within the scope of protection of the present invention.

Claims

1. A syringe characterized by, The utility model relates to a kind of injection device, including: Host module (11) and injection module (12), the lower end of the host module (11) is equipped with open downward containing space (13), the injection module (12) is detachably mounted in the containing space (13), and injection needle is installed on the injection module (12).

2. A syringe according to claim 1, wherein The injection module (12) includes a drug storage (24) and a first pump (25), the first pump (25) is used to deliver liquid in the drug storage (24) to the injection needle, and the first pump (25) is a positive displacement micropump.

3. The syringe of claim 1, wherein The injection module (12) includes a drive module (28) and a drug reservoir module (29), the drug reservoir module (29) has an injection chamber, the injection chamber is slidably mounted with a sealing drive part (32), the sealing drive part (32) divides the injection chamber into a drive chamber (33) and a drug storage chamber (34), the drug reservoir module (29) is provided with a drug outlet (35) penetrating the drug storage chamber (34), and the injection needle is installed on the drug outlet (35). The drive module (28) is used to deliver a drive medium into the drive chamber (33).

4. A syringe according to claim 3, wherein The drive module (28) has a drive medium storage (36) and a second pump (37), the second pump (37) is used to deliver the drive medium in the drive medium storage (36) into the drive chamber (33), and the second pump (37) is a positive displacement micropump.

5. A syringe according to claim 4, wherein The drug reservoir module (29) has an end cover (38) for shielding the injection chamber, the end cover (38) is provided with a flow channel (39), and the flow channel (39) penetrates the drive chamber (33).

6. A syringe according to claim 5, wherein The port of one end of the flow channel (39) is provided with a first rubber plug (40), the other port of the flow channel (39) is provided with a second rubber plug (41), and the middle part of the flow channel (39) penetrates the drive chamber (33).

7. A syringe according to claim 6, wherein The liquid outlet needle (42) is installed on the liquid outlet of the second pump (37), the liquid outlet needle (42) penetrates the first rubber plug (40) and the flow channel (39); and the second rubber plug (41) is detachably mounted with an exhaust valve (43).

8. The syringe of claim 3, wherein, The drug reservoir module (29) is provided with a drug inlet penetrating the drug storage chamber (34), and the drug inlet is installed with a third rubber plug (48).

9. The syringe of claim 1, wherein The inner wall of the containing space (13) is installed with a position adjusting device, and the position adjusting device is used to adjust the position of the injection module (12).

10. A syringe according to claim 9, wherein The position adjusting device is a three-axis module; Or, the position adjusting device is a two-axis module; or, the position adjusting device is a one-axis module.

Images