CN217366771U

CN217366771U - Micro-syringe

Info

Publication number: CN217366771U
Application number: CN202220188876.3U
Authority: CN
Inventors: 董清
Original assignee: Anhui Provincial Hospital First Affiliated Hospital of USTC
Current assignee: Anhui Provincial Hospital First Affiliated Hospital of USTC
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-09-06
Anticipated expiration: 2032-01-24

Abstract

The utility model discloses a micro-injector, which comprises a needle cylinder with a pull rod and a pressing component, wherein one end of the pull rod is arranged outside the needle cylinder and is connected with the pressing component, the other end of the pull rod is connected with the inner wall of a working cylinder through a piston, the working cylinder is arranged inside the needle cylinder, the volume of the working cylinder meets the application requirement, the needle cylinder is provided with a needle cylinder nozzle, and the needle cylinder nozzle is communicated with the inside of the working cylinder; the pushing assembly comprises a spiral cylinder and a connecting support, the spiral cylinder is rotatably connected to the outer surface of the needle cylinder, one end of the connecting support is connected with the pull rod, and the other end of the connecting support is connected with the outer surface of the spiral cylinder. The utility model discloses a set up linking bridge and be connected the pull rod of control injection with the spiral section of thick bamboo, thereby reach the purpose of control injection volume through rotating the decline of spiral section of thick bamboo control pull rod. The injection device effectively prevents the inaccurate injection dosage and also prevents the condition that the injection flows out due to the falling of the pull rod caused by the gravity factor of the pull rod.

Description

Micro-syringe

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to micro-injector.

Background

The smallest size disposable syringe currently used clinically is 1ML, and the smallest marked scale is 0.1 ML. With the development of medical and care technologies, smaller dose injections of drugs are required for clinical care, such as insulin injection, intradermal injection, etc. In particular, the national health commission office of 4 months in 2021 prints a skin test guiding principle of B lactam antibacterial drugs, and the dose of intradermal injection is updated to be 0.02ML-0.03ML, so that the traditional injector cannot meet the actual demand due to the injection of the drugs with small dose.

The existing low-dose injector is similar to the existing mainstream injector, and the accommodating cavity in the needle cylinder is only reduced, so that the volume of the accommodating cavity is suitable for accommodating low-dose injection. However, since the minimum scale mark of the small-dose syringe is greatly reduced, a nurse can easily cause the excessive amount of the injected liquid medicine by injecting a small amount of the liquid medicine, and the injection dose is not controlled well. Secondly, as the injection dosage is greatly reduced, the volume of the syringe body is also greatly reduced, so that the marking line of the minimum scale marked on the syringe body is too small and too thin, so that the scale cannot be seen clearly during the injection of the micro-medicament, and the injection dosage is inaccurate.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a micro-injector to solve prior art, because the unsafe technical problem of injection dosage that current low dose syringe operation inconvenience and lead to.

In order to solve the above technical problem, the utility model particularly provides the following technical scheme:

a micro-injector comprises a needle cylinder with a pull rod and a pressing component which is rotatably connected to the outer surface of the needle cylinder, wherein one end of the pull rod is arranged outside the needle cylinder and is connected with the pressing component through a connecting support, the other end of the pull rod extends towards the inside of the needle cylinder and is connected with the inner wall of a working cylinder through a piston, the working cylinder is arranged inside the needle cylinder, the volume of the working cylinder meets the application requirement, a needle cylinder nozzle is arranged at one end, far away from the connecting support, of the needle cylinder, and the needle cylinder nozzle penetrates through the needle cylinder and is communicated with the inside of the working cylinder; the pressing component comprises a spiral cylinder and a connecting support, the spiral cylinder is rotatably connected to the outer surface of the needle cylinder, one end of the connecting support is connected with the pull rod, and the other end of the connecting support is connected with the outer surface of the spiral cylinder.

As an optimized scheme of the utility model, the ring channel has been seted up to the spiral section of thick bamboo surface, the upside cell wall and the downside cell wall of ring channel all are provided with the spacing groove, the spacing inslot is provided with the rotor plate, the rotor plate with linking bridge keeps away from the one end of pull rod is connected.

As an optimized scheme of the utility model, the cylinder is through seting up external screw thread on the cylinder surface with the spiral shell is connected, the external screw thread is non-closed formula external screw thread, exists a breach promptly and will the external screw thread ends, the breach along the axis direction of cylinder is past the reverse extension of cylinder mouth.

As an optimized scheme of the utility model, the cylinder surface is provided with scale mark A and scale mark B, scale mark A sets up the external screw thread below is used for showing the dose of injection, scale mark B sets up be used for showing in the breach the removal height of spiral section of thick bamboo, the breach upwards extends and surpasss the external screw thread.

As an optimized scheme of the utility model, linking bridge with the pull rod is detachable rotation connection, linking bridge with the rotor plate rotates to be connected.

In order to solve the technical problem, the utility model discloses still further provide following technical scheme:

compared with the prior art, the utility model following beneficial effect has:

the utility model discloses a set up linking bridge and be connected the pull rod of control injection with the spiral section of thick bamboo, thereby through rotating the purpose that the spiral section of thick bamboo control pull rod descends and reach the control injection volume, the method of injecting the dosage of will controlling changes into the descending height through the control spiral section of thick bamboo by manual control injection dynamics for the dosage of medicine injection has obtained accurate control, makes the treatment process more perfect. And also prevents the injection liquid from flowing out due to the falling of the pull rod caused by the gravity of the pull rod.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary and that other implementation drawings may be derived from the provided drawings by those of ordinary skill in the art without inventive effort.

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a cross-sectional view of the present invention.

The reference numerals in the drawings denote the following, respectively:

1. a pull rod; 2. a needle cylinder; 3. pressing the assembly; 4. connecting a bracket; 5. a piston; 6. a working barrel; 7. a syringe nozzle; 8. a spiral cylinder; 9. an annular groove; 10. a limiting groove; 11. a rotating sheet; 12. an external thread; 13. a notch; 14. scale line A; 15. scale line B; 16. an injection needle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 and fig. 2, the utility model provides a microinjector, a needle cylinder 2 with a pull rod 1 and a pressing component 3 which is rotatably connected on the outer surface of the needle cylinder 2, one end of the pull rod 1 is arranged outside the needle cylinder 2 and is connected with the pressing component 3 through a connecting bracket 4, the other end of the pull rod 1 extends towards the inside of the needle cylinder 2 and is connected with the inner wall of a working cylinder 6 through a piston 5, the working cylinder 6 is arranged inside the needle cylinder 2, the volume of the working cylinder 6 meets the application requirement, one end of the needle cylinder 2 away from the connecting bracket 4 is provided with a needle cylinder nozzle 7, and the needle cylinder nozzle 7 penetrates through the needle cylinder 2 and is communicated with the inside of the working cylinder 6; the pressing component 3 comprises a spiral cylinder 8 and a connecting support 4, the spiral cylinder 8 is rotatably connected to the outer surface of the needle cylinder 2, one end of the connecting support 4 is connected with the pull rod 1, and the other end of the connecting support is connected with the outer surface of the spiral cylinder 8.

The working cylinder 6 is used for storing injection, the pull rod 1 is connected with the inner wall of the working cylinder 6 in a sliding mode through the piston 5, and the piston 5 moves up and down in the working cylinder 6 to absorb external injection into the working cylinder 6 or discharge the injection in the working cylinder 6 through the syringe nozzle 7. And because this device supplies to inject the injection use of small dose, consequently the volume of working barrel 6 can be less relatively, if can cause the condition that medical staff can't see clearly to take place on working barrel 6 with the scale mark ruling, so set up working barrel 6 inside cylinder 2, there is the great cylinder 2 of volume to cover it in working barrel 6 outside promptly, not only can normally use working barrel 6 to inject the injection this moment, but also can be through ruling the scale mark at 2 surface of cylinder, thereby reach the effect of observation scale mark that can show, avoided because seeing clearly the medical accident that the scale mark leads to.

In addition, the spiral cylinder 8 is rotatably connected with the outer surface of the needle cylinder 2 and is connected with the pull rod 1 through the connecting bracket 4. If want to push the time to medicine in the working barrel 6, rotate spiral section of thick bamboo 8 and make its decline, spiral section of thick bamboo 8 can tractive linking bridge 4 this moment, and linking bridge 4 drives pull rod 1 and descends, alright with the purpose that need not artifical application of force injection, accurate control injection volume in reaching.

Annular groove 9 has been seted up to 8 surfaces of spiral section of thick bamboo, and the upside cell wall and the downside cell wall of annular groove 9 all are provided with spacing groove 10, are provided with rotor plate 11 in the spacing groove 10, and rotor plate 11 is connected with the one end that linking bridge 4 kept away from pull rod 1.

When the spiral cylinder 8 rotates around the needle cylinder 2, the rotating plate 11 mounted on the spiral cylinder 8 rotates in the limiting groove 10, and when the spiral cylinder 8 descends, the rotating plate 11 in the limiting groove 10 is driven to descend together, so that the connecting bracket 4 and the pull rod 1 connected with the connecting bracket 4 are driven to descend, and the purpose of injecting the injection liquid is finally achieved.

The needle cylinder 2 is connected with the spiral cylinder 8 through an external thread 12 arranged on the outer surface of the needle cylinder 2, the external thread 12 is a non-closed external thread, namely, a gap 13 is formed to cut off the external thread 12, and the gap 13 extends along the axial direction of the needle cylinder 2 to the reverse direction of the needle cylinder mouth 7.

The outer surface of the cylinder 2 is provided with graduation mark A14 and graduation mark B15, graduation mark A14 is arranged below the external thread 12 for displaying the dosage of the injection, graduation mark B15 is arranged in a gap 13 for displaying the moving height of the screw cylinder 8, and the gap 13 extends upwards to exceed the external thread 12.

The needle cylinder 2 is connected with the spiral cylinder 8 through the external thread 12 arranged on the outer surface of the needle cylinder 2, so that the method for controlling the injection dosage is changed from manual control of the injection force into control of the descending height of the spiral cylinder 8, the injection dosage of the medicine is accurately controlled, and the treatment process is more complete. And also prevents the injection liquid from flowing out due to the falling of the pull rod 1 caused by the gravity of the pull rod 1. The notch 13 of the external thread 12 is provided to provide a graduation mark B15 in the notch 13, so that when the screw cylinder 8 ascends or descends, it can be clear how much amount of connection to the descending amount is achieved through the graduation mark B15, thereby achieving the purpose of controlling the injection amount.

The connecting bracket 4 is detachably and rotatably connected with the pull rod 1, and the connecting bracket 4 is rotatably connected with the rotating sheet 11. In the actual use process, an injection needle 16 can be sleeved at the mouth end of the syringe 2, so that the injection needle can be inserted into the skin of a patient for injection. In the use, can use the control of the slow accuracy of spiral section of thick bamboo 8 to inject when injecting, but when needing to aspirate medicine with medicine deposit in working barrel 6, the slow suction of spiral section of thick bamboo 8 delays work efficiency, therefore, be detachable rotation connection with linking bridge 4 and pull rod 1, linking bridge 4 rotates with rotor plate 11 to be connected, when needs aspirate outside medicine, with linking bridge 4 and pull rod 1 disconnection, and because linking bridge 4 rotates with rotor plate 11 to be connected, can rotate linking bridge 4 this moment and make it keep away from pull rod 1, carry pull rod 1 alright absorption outside medicine again, the improvement that is showing absorbs the work efficiency of medicine, medical staff's operating time has been saved.

The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.

Claims

1. A micro-injector is characterized by comprising a needle cylinder (2) with a pull rod (1) and a pressing component (3) which is rotatably connected to the outer surface of the needle cylinder (2), wherein one end of the pull rod (1) is arranged outside the needle cylinder (2) and is connected with the pressing component (3) through a connecting support (4), the other end of the pull rod (1) extends towards the inside of the needle cylinder (2) and is connected with the inner wall of a working cylinder (6) through a piston (5), the working cylinder (6) is arranged inside the needle cylinder (2), the volume of the working cylinder (6) meets application requirements, one end, far away from the connecting support (4), of the needle cylinder (2) is provided with a needle cylinder nozzle (7), and the needle cylinder nozzle (7) penetrates through the needle cylinder (2) and is communicated with the inside of the working cylinder (6);

the lower pressing component (3) comprises a spiral cylinder (8) and a connecting support (4), the spiral cylinder (8) is rotatably connected to the outer surface of the needle cylinder (2), one end of the connecting support (4) is connected with the pull rod (1), and the other end of the connecting support is connected with the outer surface of the spiral cylinder (8).

2. The micro-syringe as claimed in claim 1, wherein the outer surface of the spiral cylinder (8) is provided with an annular groove (9), the upper groove wall and the lower groove wall of the annular groove (9) are provided with limit grooves (10), the limit grooves (10) are provided with rotating pieces (11), and the rotating pieces (11) are connected with one end of the connecting bracket (4) far away from the pull rod (1).

3. A micro-injector according to claim 1, characterized in that the needle cylinder (2) is connected to the screw cylinder (8) by means of an external thread (12) provided on the outer surface of the needle cylinder (2), the external thread (12) being a non-closed external thread, i.e. there is a gap (13) terminating the external thread (12), the gap (13) extending in the axial direction of the needle cylinder (2) in the direction opposite to the needle cylinder mouth (7).

4. A micro-injector according to claim 3, characterized in that the outer surface of the barrel (2) is provided with graduation marks a (14) and B (15), the graduation marks a (14) being arranged below the external thread (12) for displaying the dose of injection liquid, the graduation marks B (15) being arranged in the gap (13) for displaying the displacement height of the screw barrel (8), the gap (13) extending upwards beyond the external thread (12).

5. A micro-syringe according to claim 2, characterized in that the connecting bracket (4) is detachably and rotatably connected with the pull rod (1), and the connecting bracket (4) is rotatably connected with the rotating piece (11).