CN201710753U - Novel medical injector - Google Patents

Abstract

The utility model relates to a novel medical syringe used for discharging or inhaling liquid in hospitals and clinics. During the injection process, it can keep the needle stable in the human body, and there is no need to use the thumb to apply axial force to press the push rod piston, which reduces the pain of the patient. The technical solution is: the needle head is installed on the circular needle tube; the piston is put into the circular needle tube; the elastic airbag is set on the other end of the circular needle tube, and the elastic force of the neck is connected with the circular needle tube to seal; the ventilation switch is fixed on the elastic airbag neck. When injecting, radially pinch the elastic airbag with your hand, push the piston to move, discharge the liquid medicine into the human body, and keep the needle stable without wriggling in the human body, reducing the pain of the patient. The utility model does not require axial thrust, and the liquid can be injected into the body only by radially pinching the spherical elastic air bag; the operation is convenient and easy to grasp; the structure is simple, the cost is low, and the elastic air bag can be used for many times; the medical syringe can be used for Hospital, clinic, or home injections.

Description

A new type of medical syringe

Technical field:

The utility model relates to a novel medical syringe used for discharging or inhaling liquid in hospitals and clinics.

Background technique:

A medical syringe usually consists of a needle, a needle tube, a piston and a push rod. When injecting or withdrawing fluid, the needle is often not fully inserted into the body, but only partially. When injecting, if the needle wriggles in the body, people will feel more painful and uncomfortable. In the actual injection operation, after the medical staff inserts the needle into the human body, the index finger and middle finger of one hand hold the needle tube to keep it stable, and the thumb presses the push rod to move the piston forward. The pressure in the needle increases and the liquid is injected into the body. During this process, one hand should not only try to keep the clamped needle tube in balance to avoid the needle from wriggling in the body, but also apply an axial force in the same direction as the needle to push the piston. According to the analysis, the axial force exerted by the thumb pressing the push rod is the main reason why the needle cannot be kept stable in the body. This is not easy to grasp for non-professional medical staff or beginners, especially some patients inject at home.

Contents of the invention

The purpose of this utility model is: in order to keep the needle stable in the human body during the injection process, it is not necessary to use the thumb to apply axial force to press the push rod piston, so as to reduce the pain of the patient, and to provide a new type of medical syringe.

In order to achieve the above object, the utility model adopts the following technical solutions: a novel medical syringe, which is composed of a needle, a circular needle tube, a piston, an elastic air bag, and a ventilation switch. Its structural features are: the needle head is installed on the circular needle tube; the piston is placed in the circular needle tube; the elastic airbag is set on the other end of the circular needle tube, and the elastic force of the neck is connected to the circular needle tube to seal; the ventilation switch is fixed on the neck of the elastic airbag department.

When injecting, hold the elastic airbag radially with your hand, the B cavity will generate high pressure, push the piston forward, the pressure in the A cavity will increase, and the liquid medicine will be discharged into the human body. Force, the needle will not wriggle in the human body and remain stable, reducing the pain of the patient.

The beneficial effects of the utility model are: (1) no axial thrust is required, and the liquid can be injected into the body only by radially pinching the spherical elastic airbag; (2) the needle will not move axially, reducing the pain of the patient; ( 3) The operation is convenient and easy to grasp; (4) The structure is simple and the cost is low (the elastic airbag can be used for many times).

Description of drawings

Accompanying drawing is the structural representation of the utility model medical injector. In the figure 1. Needle, 2. Round needle tube, 3. Piston, 4. Elastic air bag, 5. Ventilation switch, A. Needle tube inner cavity, B. Elastic air bag inner cavity.

Detailed ways

As shown in the attached figure, when absorbing the liquid medicine, turn off the ventilation switch 5, pinch the elastic air bag 4, the volume of cavity B decreases, the pressure increases, and the piston 3 is pushed to move to the left; the needle 1 is inserted into the medicine bottle, and the elastic air bag is loosened 4. Its elastic recovery increases the volume of chamber B and reduces the pressure, the piston 3 moves to the right under the action of pressure difference, the volume of chamber A decreases, and the liquid medicine is sucked. If there is air in chamber A, put the needle 1 upwards, gently pinch the elastic airbag 4, squeeze out the gas in the needle tube, turn on the ventilation switch 5, loosen the grip on the elastic airbag 4, the air enters chamber B from the ventilation switch 5, and wait until the elastic airbag 4 After fully recovering, turn off the ventilation switch 5 again. When injecting, the needle 1 is inserted into the body, the elastic air bag 4 is pinched radially, the pressure in the B chamber increases, the piston 3 is pushed to move left, the pressure in the A chamber increases, and the medicinal liquid is injected into the body. Finished, open the ventilation switch 5, the air intake of the elastic airbag 4 is in a normal pressure state, and the needle 1 is pulled out.

Claims (1)

1. A new type of medical syringe, consisting of a needle, a circular needle tube, a piston, an elastic air bag, and a ventilation switch, characterized in that: the needle (1) is installed on the circular needle tube (2); the piston (3) is placed on the circular In the needle tube (2); the elastic airbag (4) is set on the other end of the circular needle tube (2), and is connected and sealed with the circular needle tube (2) by the elastic force of the neck; the ventilation switch (5) is fixed on the elastic airbag (4) neck.

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