CN221618174U - A medical syringe capable of quantitative injection - Google Patents

Abstract

The utility model discloses a medical injector capable of quantitative injection, in particular to the injector field, which comprises a needle cylinder, wherein a piston is inserted in the needle cylinder, a push rod is fixedly connected with the top of the piston, the push rod is inserted in the needle cylinder, the outer wall of the needle cylinder is provided with a shell, the inside rotation of shell is connected with the threaded rod, and the outer wall of threaded rod has the slider through threaded connection, and slider sliding connection is in the inside of shell, and the inside fixed mounting of slider has first spring, and the one end fixed mounting of first spring has the fastener. According to the utility model, the threaded rod and the sliding block are arranged, so that the threaded rod can be rotated to drive the sliding block to slide and rise, and finally the distance between the pressure rod and the top of the shell is changed, so that the effect of changing the quantitative injection quantity according to the injection requirement is achieved, the quantitative injection is convenient for medical staff, and the excessive or insufficient skin test liquid of the injection is prevented from influencing the test result of the skin test.

Description

A medical syringe capable of quantitative injection

Technical Field

The utility model relates to the field of syringes, and more specifically, to a medical syringe capable of quantitative injection.

Background Art

A syringe is a common medical device that uses a needle to extract or inject gas or liquid. A syringe can also be used in medical equipment, containers, and scientific instruments such as some chromatography to inject through a rubber diaphragm.

Chinese utility model CN210044610U discloses a medical quantitative syringe, comprising a syringe and a piston installed in the syringe; a core rod is fixed on the piston, and the core rod extends upward to the outside of the syringe; a guide ruler is fixed on the syringe, and a slide seat that can slide up and down along the guide ruler is provided on the guide ruler; the slide seat is fixedly connected to the core rod, and a guide hole is provided on the slide seat, and a rolling ball that matches the clearance with the guide hole is provided in the guide hole, and the left part of the rolling ball extends to the outside of the guide hole and abuts against the guide ruler, and a spring for driving the rolling ball to move toward the guide ruler is provided in the guide hole; a plurality of quantitative concave holes for the rolling ball to be inserted are provided on the guide ruler, the aperture of the quantitative concave holes is smaller than the diameter of the rolling ball, and the quantitative concave holes are arranged at equal intervals from top to bottom. The syringe provided by the utility model can realize quantitative push injection of liquid, but this arrangement cannot accurately perform quantitative injection during micro-injection, which easily leads to excessive or insufficient injection, and cannot truly perform micro-quantitative injection.

Utility Model Content

In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a medical syringe capable of quantitative injection. By providing a threaded rod and a slider, the threaded rod can be rotated so that the threaded rod drives the slider to slide up, and finally the distance between the pressure rod and the top of the shell is changed, so as to achieve the effect of changing the quantitative injection volume according to the injection requirements, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a medical syringe capable of quantitative injection, comprising a syringe, a piston is inserted into the interior of the syringe, a push rod is fixedly connected to the top of the piston, the push rod is inserted into the interior of the syringe, an outer wall of the syringe is provided with a shell, a threaded rod is rotatably connected to the interior of the shell, a slider is threadedly connected to the outer wall of the threaded rod, the slider is slidably connected to the interior of the shell, a first spring is fixedly installed inside the slider, a clamp is fixedly installed at one end of the first spring, the clamp is slidably connected to the interior of the slider, a clamp is provided on one side of the clamp, a scale is fixedly connected to the top of the clamp, a guide rod is inserted into the interior of the scale.

In a preferred embodiment, the guide rod is inserted into the interior of the clamping plate, and the guide rod is fixedly installed inside the housing.

In a preferred embodiment, a second spring is sleeved on the outer wall of the guide rod, the second spring is fixedly mounted on the bottom of the clamping plate, and the second spring is fixedly mounted inside the housing.

In a preferred embodiment, the scale member is inserted into the interior of the housing, and a pressure rod is fixedly connected to the top of the scale member, and the pressure rod is arranged on one side of the push rod.

In a preferred embodiment, a connector is inserted into the interior of the housing, and a clamping plate is fixedly connected to the bottom of the connector.

In a preferred embodiment, the clamp is slidably connected to the inside of the housing, and the clamp is arranged on the outer wall of the syringe.

In a preferred embodiment, a third spring is fixedly mounted on the bottom of the clamping plate, and the third spring is fixedly mounted inside the housing.

Technical effects and advantages of the utility model:

1. The utility model is provided with a threaded rod and a slider, and the threaded rod can be rotated so that the threaded rod drives the slider to slide up along the inside of the shell, and then the slider drives the first spring and the clamp to rise together, and finally the distance between the pressure rod and the top of the shell is changed, so as to achieve the effect of changing the quantitative injection amount according to the injection demand, which is convenient for medical staff to perform quantitative injection and prevent the injection of too much or too little skin test solution, which affects the test results of the skin test;

2. The utility model is provided with a connecting piece and a splint. When the outer shell is to be clamped on the syringe, the connecting piece on the outer shell is first pressed, so that the connecting piece pushes the splint to squeeze the third spring to contract, and then the syringe is inserted into the gap opened between the splint and the outer shell. Finally, the pressing of the connecting piece is stopped, and the third spring pushes the splint to be clamped on the syringe, and the outer shell is clamped and fixed on the syringe through the splint, so as to achieve the effect of quickly installing the outer shell and the syringe, and facilitate medical staff to replace the used syringes.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of the utility model.

FIG2 is a cross-sectional view of the shell structure of the present invention.

FIG3 is an enlarged structural view of section A of FIG2 of the present invention.

The accompanying drawings are marked as follows: 1. syringe; 2. piston; 3. push rod; 4. housing; 5. threaded rod; 6. slider; 7. first spring; 8. clamp; 9. clamp plate; 10. scale member; 11. guide rod; 12. second spring; 13. pressure rod; 14. connecting member; 15. splint; 16. third spring.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Embodiment 1: Referring to Figures 1-3 of the specification, a medical syringe capable of quantitative injection of the utility model comprises a syringe 1, as shown in Figure 2 for details, a piston 2 is inserted into the interior of the syringe 1, a push rod 3 is fixedly connected to the top of the piston 2, the push rod 3 is inserted into the interior of the syringe 1, and a shell 4 is provided on the outer wall of the syringe 1, as shown in Figure 3 for details, a threaded rod 5 is rotatably connected to the interior of the shell 4, a slider 6 is threadedly connected to the outer wall of the threaded rod 5, the slider 6 is slidably connected to the interior of the shell 4, a first spring 7 is fixedly installed inside the slider 6, a clamping member 8 is fixedly installed at one end of the first spring 7, the clamping member 8 is slidably connected to the interior of the slider 6, a clamping plate 9 is provided on one side of the clamping member 8, a scale member 10 is fixedly connected to the top of the clamping plate 9, and a guide rod 11 is inserted into the interior of the scale member 10.

It should be noted that, when the amount of quantitative injection is adjusted for the first time, the threaded rod 5 is rotated to make the threaded rod 5 drive the slider 6 to slide and rise along the inside of the shell 4, and then the slider 6 drives the first spring 7 and the clamp 8 to rise together, and the clamp 8 drives the clamp plate 9 to rise. The rise of the clamp plate 9 will cause the second spring 12 to lose pressure and stretch to reset, and drive the scale member 10 to gradually separate from the inside of the shell 4. The movement of the scale member 10 will drive the pressure rod 13 to rise and stop contacting the top of the shell 4. When the distance between the pressure rod 13 and the top of the shell 4 reaches the requirement, first use a syringe to draw out the skin test solution, then clamp the shell 4 on the outer wall of the syringe barrel 1, and then press the push rod 3. The push rod 3 will push the piston 2 to squeeze the skin test solution inside the syringe 1 until the push rod 3 contacts the outer wall of the pressure rod 13 and stops. The air and excess skin test fluid inside the syringe 1 are discharged. Finally, the patient's skin is tightened with one hand and the needle is held with the other hand, with the needle bevel facing upward. The needle is inserted at an angle of 5 to 15 degrees to the skin and the push rod 3 is pressed, so that the push rod 3 pushes the pressure rod 13 to move toward the top of the shell 4, and then the pressure rod 13 squeezes the card plate 9 through the scale member 10, so that the card plate 9 presses the card member 8 and squeezes the second spring 12 to contract until the pressure rod 13 is pressed to contact the top of the shell 4 and stops. At this time, the syringe completes the injection of a quantitative skin test fluid, so as to achieve the effect of adding a control member to the syringe, so that the syringe can quantitatively inject the skin test fluid, which is convenient for medical staff to perform quantitative injection and prevents the injection of too much or too little skin test fluid from affecting the test results of the skin test. At the same time, the threaded rod 5 can be rotated to change the amount of quantitative injection according to the injection requirements.

Embodiment 2: The guide rod 11 is inserted into the interior of the card plate 9, and the guide rod 11 is fixedly installed inside the shell 4. The outer wall of the guide rod 11 is sleeved with a second spring 12, and the second spring 12 is fixedly installed on the bottom of the card plate 9. The second spring 12 is fixedly installed inside the shell 4. The scale member 10 is inserted into the interior of the shell 4, and the top of the scale member 10 is fixedly connected with a pressure rod 13, and the pressure rod 13 is arranged on one side of the push rod 3. A connecting member 14 is inserted into the interior of the shell 4, and a splint 15 is fixedly connected to the bottom of the connecting member 14. The splint 15 is slidably connected to the interior of the shell 4, and the splint 15 is arranged on the outer wall of the syringe 1. A third spring 16 is fixedly installed on the bottom of the splint 15, and the third spring 16 is fixedly installed inside the shell 4.

It should be noted that, since the syringe is a disposable item, when the syringe injection is completed, the shell 4 can be removed from the used syringe barrel 1, and the pressure rod 13 loses the squeezing of the used syringe push rod 3 and loses pressure, so that the second spring 12 can push the card plate 9 to press the card member 8 and re-card it in the slider 6, and then the card plate 9 pushes the pressure rod 13 through the scale member 10 to reset, so that when the shell 4 is installed on a new syringe for skin test solution injection, it does not need to be readjusted, and the skin test solution can be directly injected quantitatively, reducing The operation steps are convenient for medical staff to use. It should be noted that when the shell 4 is clamped on the syringe 1, first press the connecting piece 14 on the shell 4, so that the connecting piece 14 pushes the splint 15 to squeeze the third spring 16 to contract, and then insert the syringe 1 into the gap opened between the splint 15 and the shell 4. Finally, stop pressing the connecting piece 14, let the third spring 16 push the splint 15 to be clamped on the syringe 1, and let the shell 4 be clamped and fixed on the syringe 1 through the splint 15, so as to achieve the effect of quickly installing the shell 4, which is convenient for medical staff to replace the syringe.

Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, which can be a mechanical connection or an electrical connection, or the internal communication of two components, or a direct connection. "upper", "lower", "left" and "right" are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims (7)

1. A medical injector capable of quantitative injection, which comprises a needle cylinder (1), and is characterized in that: the inside grafting of cylinder (1) has piston (2), the top fixedly connected with push rod (3) of piston (2), the inside at cylinder (1) is pegged graft to push rod (3), the outer wall of cylinder (1) is provided with shell (4), the inside rotation of shell (4) is connected with threaded rod (5), the outer wall of threaded rod (5) has slider (6) through threaded connection, slider (6) sliding connection is in the inside of shell (4), the inside fixed mounting of slider (6) has first spring (7), the one end fixed mounting of first spring (7) has fastener (8), fastener (8) sliding connection is in the inside of slider (6), one side of fastener (8) is provided with cardboard (9), the top fixedly connected with scale (10) of cardboard (9), the inside grafting of scale (10) has guide bar (11).

2. A medical injector capable of quantitative injection according to claim 1, characterized in that: the guide rod (11) is inserted into the clamping plate (9), and the guide rod (11) is fixedly arranged in the shell (4).

3. A medical injector capable of quantitative injection according to claim 2, characterized in that: the outer wall of guide bar (11) cup joints second spring (12), second spring (12) fixed mounting is in the bottom of cardboard (9), second spring (12) fixed mounting is in the inside of shell (4).

4. A medical injector capable of quantitative injection according to claim 3, characterized in that: the scale piece (10) is inserted into the shell (4), a pressing rod (13) is fixedly connected to the top of the scale piece (10), and the pressing rod (13) is arranged on one side of the push rod (3).

5. A medical injector capable of quantitative injection according to claim 4, wherein: the inside of shell (4) is pegged graft and is had connecting piece (14), the bottom fixedly connected with splint (15) of connecting piece (14).

6. A medical injector capable of quantitative injection according to claim 5, characterized in that: the clamping plate (15) is connected inside the shell (4) in a sliding way, and the clamping plate (15) is arranged on the outer wall of the needle cylinder (1).

7. A medical injector capable of quantitative injection according to claim 6, characterized in that: the bottom of the clamping plate (15) is fixedly provided with a third spring (16), and the third spring (16) is fixedly arranged in the shell (4).