CN219558322U

CN219558322U - Injection device for preventing liquid from flowing out by itself

Info

Publication number: CN219558322U
Application number: CN202222225689.0U
Authority: CN
Inventors: 周敏贤; 杨日雯
Original assignee: Sixth Affiliated Hospital of Sun Yat Sen University
Current assignee: Sixth Affiliated Hospital of Sun Yat Sen University
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2023-08-22
Anticipated expiration: 2032-08-23

Abstract

The utility model relates to a medical auxiliary instrument, in particular to an injection device for preventing liquid from flowing out by itself, which provides an injection device for preventing liquid from flowing out by itself and solves the problem that liquid in a tube flows out when the injection device is used. The valve tube comprises a first tube body, a liquid inlet fixedly arranged at one end of the first tube body, a liquid outlet fixedly arranged at the other end of the first tube body and a valve flap fixedly arranged in the liquid inlet, wherein the inner diameter of the first tube body close to the liquid inlet is equal to the outer diameter of the first tube body close to the liquid outlet, the valve flap is in a cambered surface shape, a cross through groove is formed in the middle of the valve flap, and the valve tube is arranged in front of the injector.

Description

Injection device for preventing liquid from flowing out by itself

Technical Field

The utility model relates to a medical auxiliary instrument, in particular to an injection device for preventing liquid from flowing out by itself.

Background

In clinic, patients with cough, bloody sputum, wheezing, hoarseness and the like need to be clearly treated by a bronchoscope to assist diagnosis, and the bronchoscope examination is very important in airway disease treatment, but because of invasive characteristics of the bronchoscope, relevant mucous membrane tissues can be stimulated to a certain extent in the operation process, and certain pain is brought to the patients, so that the compliance and safety of the examination of the patients are improved, and the local anesthesia or general anesthesia needs to be carried out by a syringe before the bronchoscope is made; in addition, some parts are sometimes required to be irrigated by flushing through a syringe in the operation process, however, after the gunpowder or the lavage liquid is sucked through the syringe, the liquid is easy to drip before the operation is carried out by holding the syringe, and even if the liquid which is dripped in clinic carelessly enters the eyes of a patient to cause discomfort, the discomfort of the patient is increased; based on the above, the utility model provides an injection device for preventing liquid from flowing out by itself.

Disclosure of Invention

The utility model aims at: an injection device is provided to prevent liquid from flowing out by itself, and to avoid the problem of flowing out the liquid in a tube when in use.

The utility model is realized by the following technical scheme: the valve tube comprises a first tube body, a liquid inlet fixedly arranged at one end of the first tube body, a liquid outlet fixedly arranged at the other end of the first tube body and a valve piston fixedly arranged in the liquid inlet, wherein the inner diameter of the first tube body close to the liquid inlet is equal to the outer diameter of the first tube body close to the liquid outlet, and the valve piston is in a cambered surface shape and is provided with a cross through groove in the middle.

Further, the valve tube also comprises a syringe and a needle head arranged at one end of the syringe, and the valve tube is sleeved between the syringe and the needle head for connection.

Still further, the cylinder still includes the second body and overlaps the injection push rod of establishing in the second body, the second body (including setting firmly the liquid exchange channel at one end and setting firmly the pressure plate at another end, the inlet pot head of first body is located the liquid exchange channel outer wall, the liquid outlet pot head of first body (31) is located the syringe needle intraductal wall, liquid exchange channel outer wall and valve pipe outer wall have set firmly the connecting rope.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the valve tube is arranged between the syringe and the needle head, so that liquid is blocked in the tube by the valve membrane in the process of using the syringe, and the valve can not be opened by itself when insufficient pressure exists, thereby effectively preventing the liquid in the syringe from flowing out after the liquid medicine is sucked.

Drawings

FIG. 1 is a schematic diagram of the present utility model;

FIG. 2 is an exploded view of the present utility model;

FIG. 3 is a schematic cross-sectional view of the present utility model;

fig. 4 is a schematic view of a valve membrane of the present utility model.

Reference numerals illustrate:

10 needle cylinder, 20 needle heads, 30 valve tube and 40 connecting ropes;

31 a first tube body, 32 a liquid inlet, 33 a liquid outlet and 34 a valve;

11 second pipe body, 12 injection push rod, 13 liquid exchange channel, 14 pressure plate;

341 cross through grooves.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Embodiment one: as shown in fig. 3-4, the valve tube 30 comprises a first tube body 31, a liquid inlet 32 fixedly arranged at one end of the first tube body 31, a liquid outlet 33 fixedly arranged at the other end of the first tube body 31, and a valve membrane 34 fixedly arranged in the liquid inlet 32, wherein the inner pipe diameter of the end, close to the liquid inlet 32, of the first tube body 31 is equal to the outer pipe diameter of the end, close to the liquid outlet 33, of the first tube body 31. The valve 34 is arc-shaped and a cross-shaped through groove 341 is arranged in the middle of the valve 34.

The inner diameters of the two ends of the valve tube 30 are different, the liquid inlet 32 end of the first tube body 31 can be sleeved on the outer wall of the liquid outlet of the syringe, and the liquid outlet 33 end of the first tube body 31 can be sleeved on the inner wall of the needle tube, so that the valve tube 30 is utilized to realize the connection between the existing syringe and the needle, and the phenomenon that the internal liquid medicine automatically flows out in the use process of the existing syringe is prevented.

Embodiment two: as shown in fig. 1-4, the valve tube comprises a syringe 10, a needle head 20 arranged at one end of the syringe 10 and a valve tube 30 sleeved between the syringe 10 and the needle head 20 for connecting;

the valve tube 30 comprises a first tube body 31, a liquid inlet 32 fixedly arranged at one end of the first tube body 31, a liquid outlet 33 fixedly arranged at the other end of the tube body and a valve membrane 34 fixedly arranged in the liquid inlet 32; wherein the inner pipe diameter of the end, close to the liquid inlet 32, of the first pipe body 31 is equal to the outer pipe diameter of the end, close to the liquid outlet 33, of the first pipe body 31; the valve 34 is arc-shaped and a cross-shaped through groove 341 is arranged in the middle of the valve 34.

The syringe 10 further comprises a second tube 11 and an injection push rod 12 sleeved in the second tube 11, the second tube 11 comprises a liquid exchange channel 13 fixedly arranged at one end and a pressure plate 14 fixedly arranged at the other end, a liquid inlet 32 end of the first tube 31 can be sleeved on the outer wall of the liquid exchange channel 13, a liquid outlet 33 end of the first tube 31 can be sleeved on the inner wall of the needle 20, and a connecting rope 40 is fixedly arranged on the outer wall of the liquid exchange channel 13 and the outer wall of the valve tube 30.

Working principle: since the needle is used to initiate aspiration or fluid, the valve 34 is characterized by a relatively high pressure required to open the passageway to allow fluid flow, or otherwise is in a closed condition, the gravity of the fluid within the barrel is insufficient to allow it to open, thus preventing fluid leakage during the time that aspiration of fluid is about to occur.

While the utility model has been illustrated and described with respect to specific embodiments and alternatives thereof, it will be appreciated that various changes and modifications can be made therein without departing from the spirit of the utility model. In the above-described embodiments, unless explicitly specified and limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. In addition, the directions or positional relationships indicated by the terms "up and down", "left and right", etc. are based on the directions or positional relationships shown in the drawings, and are merely for convenience of description and simplification of description, and do not indicate or imply a specific direction.

It is, therefore, to be understood that the utility model is not to be in any way limited except by the appended claims and their equivalents.

Claims

1. An injection device for preventing liquid from flowing out by itself, characterized in that: including valve pipe (30), valve pipe (30) include first body (31), set firmly inlet (32) in first body (31) one end, set firmly liquid outlet (33) and set firmly in valve (34) in inlet (32) of first body (31) other end, wherein the pipe diameter equals the outer diameter of being close to liquid outlet (33) end of first body (31) in being close to inlet (32) end of first body (31), valve membrane (34) are cambered surface shape and are equipped with cross through groove (341) in the middle of valve membrane (34).

2. The injection device for preventing self-outflow of liquid according to claim 1, wherein: the valve tube (30) is sleeved in the middle of the needle cylinder (10) and the needle head (20) to play a role in connection.

3. The injection device for preventing self-outflow of liquid according to claim 2, wherein: the needle cylinder (10) further comprises a second pipe body (11) and an injection push rod (12) sleeved in the second pipe body (11), the second pipe body (11) comprises a liquid exchange channel (13) fixedly arranged at one end portion and a pressure plate (14) fixedly arranged at the other end portion, a liquid inlet (32) of the first pipe body (31) is sleeved on the outer wall of the liquid exchange channel (13), a liquid outlet (33) of the first pipe body (31) is sleeved on the inner wall of the needle head (20), and connecting ropes (40) are fixedly arranged on the outer wall of the liquid exchange channel (13) and the outer wall of the valve pipe (30).