CN217067192U - Drainage syringe - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, in particular to a drainage injector. The utility model discloses a drainage syringe includes injection tube, piston and push-and-pull rod, injection tube one end is equipped with the interface, the uncovered setting of the other end, the piston seal assembly in inside the injection tube, the one end of push-and-pull rod with the piston is connected, its other end orientation the uncovered extension of the other end of injection tube, the other end of push-and-pull rod is equipped with the position holding structure, the position holding structure is used for prevent its back of retraction behind the push-and-pull rod pull. The advantages are that: the structure design is simple and reasonable, the push-pull rod can be fixed by the position retaining structure when the drainage is operated, the purpose of continuous drainage is achieved, and the operation is more convenient.

Description

Drainage syringe

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a drainage injector.

Background

In plastic surgery, negative pressure drainage is needed in many places. Generally, medical personnel often use a syringe as the drainage device to operate. However, in the actual operation process, the condition that one hand is needed to hold the syringe main body and the other hand is continuously used for keeping the negative pressure exists in the syringe drainage process, or a syringe needle cap or a hemostatic forceps is used as an auxiliary tool, so that great labor is consumed, and the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a drainage injector, which effectively overcomes the defects of the prior art.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a drainage injector comprises an injection tube, a piston and a push-pull rod, wherein one end of the injection tube is provided with a connector, the other end of the injection tube is provided with an opening, the piston is hermetically assembled inside the injection tube, one end of the push-pull rod is connected with the piston, the other end of the push-pull rod extends towards the other end opening of the injection tube, the other end of the push-pull rod is provided with a position maintaining structure, and the position maintaining structure is used for preventing the push-pull rod from retracting after being pulled.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, two sides of the end portion of the other end of the syringe barrel are respectively provided with a limiting portion extending along the long axis direction, a limiting notch is respectively defined between the limiting portions on the two sides, two sides of the other end of the push-pull rod are respectively provided with a limiting wing panel extending vertically, in an initial state, the limiting wing panels on the two sides respectively penetrate through the limiting notches on the two sides, the push-pull rod can be pulled and pulled along the syringe barrel under the action of external force, so that the limiting wing panels move in the limiting notches or to the outer ends of the limiting notches, and after the limiting wing panels move to the outer ends of the limiting notches, the push-pull rod can rotate relative to the syringe barrel under the action of external force, so that the limiting wing panels rotate to be opposite to the end portions of the limiting portions, and the limiting wing panels on the two sides form the position retaining structure.

Furthermore, the edge of the limit wing panel is provided with a surrounding edge extending towards one end of the injection tube.

Furthermore, a limit structure for blocking the piston from separating is arranged on the inner wall of the other end of the injection tube.

Further, the limiting structure is an annular convex edge.

Furthermore, the periphery of the injection tube is provided with an anti-skid structure.

The utility model has the advantages that: the structure design is simple and reasonable, the push-pull rod can be fixed by the position retaining structure when the drainage is operated, the purpose of continuous drainage is achieved, and the operation is more convenient.

Drawings

FIG. 1 is a schematic view of the drainage syringe of the present invention;

FIG. 2 is a top view of the structure of FIG. 1;

fig. 3 is a schematic structural view of the drainage syringe of the utility model in the negative pressure drainage state.

In the drawings, the components represented by the respective reference numerals are listed below:

1. an injection tube; 2. a piston; 3. a push-pull rod; 11. an interface; 12. a limiting part; 13. a limiting structure; 14. an anti-slip structure; 31. a limiting wing panel; 311. and (7) surrounding edges.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Example (b): as shown in fig. 1, 2 and 3, the drainage syringe of the present embodiment includes a syringe barrel 1, a piston 2 and a push-pull rod 3, wherein the syringe barrel 1 has a port 11 at one end and an open end at the other end, the piston 2 is hermetically mounted inside the syringe barrel 1, one end of the push-pull rod 3 is connected to the piston 2, and the other end of the push-pull rod 3 extends toward the open end of the syringe barrel 1, and the other end of the push-pull rod 3 is provided with a position maintaining structure for preventing the push-pull rod 3 from retracting after being pulled.

The practical use process is as follows:

in an initial state, the piston 2 is positioned inside one end of the injection tube 1, during drainage, a needle cap or a drainage tube is connected with one end interface 11 of the injection tube 1, next, the injection tube 1 is held by one hand, the push-pull rod 3 is operated by the other hand to drive the piston 2 to move towards the other end of the injection tube 1, a negative pressure cavity is formed inside the injection tube 1 (between the piston 2 and the interface 11), then the relative position of the push-pull rod 3 and the injection tube 1 is kept and positioned by using the position keeping structure, so that the aim of freeing the other hand of a medical worker is fulfilled until the accumulated liquid is fully pumped inside the negative pressure cavity, the whole injector is simple and reasonable in structural design, the push-pull rod can be fixed by using the position keeping structure during drainage, the aim of continuous drainage is fulfilled, and the operation is more convenient.

In a preferred embodiment, two sides of the other end of the syringe 1 are respectively provided with a limiting portion 12 extending along the long axis direction, a limiting notch is respectively defined between the limiting portions 12 at the two sides, two sides of the other end of the push-pull rod 3 are respectively provided with a limit wing 31 in a vertical extending way, in an initial state, the limit wings 31 on two sides respectively penetrate the limit notches on two sides, the push-pull rod 3 can be pulled along the syringe 1 under the action of external force, so that the stopper wing panel 31 moves in the stopper gap, or to the outer end of the limit notch, and when the limit wing panel 31 moves to the outer end of the limit notch, the push-pull rod 3 can rotate relative to the injection tube 1 under the action of external force, so that the stopper wing pieces 31 rotate to the end portion facing the stopper portion 12, and the stopper wing pieces 31 on both sides constitute the position holding structure.

In the above embodiment, in the initial state, the limit wing panel 31 is located at one end of the limit notch, when drainage is needed, a hand acts on the limit wing panels 31 on the two sides to make the push-pull rod 3 move, so as to drive the piston 2 to move until the limit wing panel 31 moves out of the limit notch, then, the limit wing panel 31 (i.e. the push-pull rod 3) is rotated, so that the limit wing panels 31 on the two sides face the limit parts 12 on the two sides, and after the hand is loosened, the limit wing panel 31 and the limit parts 12 abut against each other under the pressure action, and in the current state, a negative pressure cavity with a specific volume is formed inside the injection tube 1, so that effective drainage can be performed.

It should be added that: the length of the position-limiting part 12 (the extension along the long axis of the syringe 1) determines the magnitude of the specific negative pressure formed inside the syringe 1, and therefore, the size is determined according to the actual sectional area of the syringe 1 and the conventional negative pressure magnitude in the actual use process, that is, the length of the position-limiting part 12 is customized according to the negative pressure magnitude required by drainage, and the accurate drainage operation is realized.

In a preferred embodiment, the edge of the stopper tab 31 is provided with a skirt 311 extending toward one end of the syringe 1.

In the above embodiment, after the limiting wing 31 moves out of the limiting notch and the limiting wing 31 is rotated, the limiting parts 12 on both sides can be respectively located inside the surrounding edge 311 of the corresponding limiting wing 31, and after the hand is loosened, the end part of the limiting part 12 can be located inside the surrounding edge 311, and because the surrounding edge 311 is closer to the periphery of the limiting part 12, the push-pull rod 3 does not shake to a large extent as a whole, that is, the wrapping of the limiting part 12 is stable.

In addition, the surrounding edge 311 is designed to prevent the user from being caught when the stopper tab 31 moves to the stopper portion 12 when the user pulls the push-pull rod 3 by holding the stopper tab 31.

In a preferred embodiment, a stopper 13 for stopping the piston 2 from being removed is provided on the inner wall of the other end of the syringe 1.

In the above embodiment, the design of the limiting structure 13 defines the maximum travel of the piston 2 moving in the syringe 1, and specifically, when the piston 2 moves to the limiting structure 13, the piston 2 is blocked by the limiting structure 13 and cannot move further, so as to prevent the piston 2 from being pulled out of the syringe 1.

Generally, the position limiting structure 13 is an annular convex ridge, which is integrally formed with the syringe 1, but the position limiting structure 13 may be a plurality of protrusions distributed at intervals along the circumferential direction of the syringe 1.

In a preferred embodiment, the syringe 1 is provided with an anti-slip structure 14 on the outer periphery.

The anti-slip structure 14 is designed to enhance the friction force between the medical care personnel and the hand when holding the syringe 1, thereby playing an anti-slip role.

The anti-slip structure 14 may be an anti-slip ridge, a plurality of evenly distributed protruding points or a plurality of evenly distributed concave points arranged on the outer vertical surface of the often-held portion of the syringe 1.

The anti-slip structure 14 may be an anti-slip rubber sleeve sleeved outside the syringe 1.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (5)

1. A drainage syringe characterized in that: the injection device comprises an injection cylinder (1), a piston (2) and a push-pull rod (3), wherein one end of the injection cylinder (1) is provided with an interface (11), the other end of the injection cylinder is arranged in an open manner, the piston (2) is assembled in the injection cylinder (1) in a sealing manner, one end of the push-pull rod (3) is connected with the piston (2), the other end of the push-pull rod extends towards the other end of the injection cylinder (1) in an open manner, the other end of the push-pull rod (3) is provided with a position maintaining structure, and the position maintaining structure is used for preventing the push-pull rod (3) from retracting after being pulled; two sides of the end part of the other end of the injection cylinder (1) are respectively provided with a limiting part (12) in an extending way along the long axis direction, a limiting gap is respectively limited between the limiting parts (12) at the two sides, two sides of the other end of the push-pull rod (3) are respectively provided with a limiting wing panel (31) in a vertically extending way, in an initial state, the limiting wing panels (31) at the two sides respectively penetrate through the limiting gaps at the two sides, the push-pull rod (3) can be pulled along the injection cylinder (1) under the action of external force, so that the limiting wing panels (31) move in the limiting gaps or move to the outer ends of the limiting gaps, and after the limiting wing panels (31) move to the outer ends of the limiting gaps, the push-pull rod (3) can rotate relative to the injection cylinder (1) under the action of external force, so that the limiting wing panels (31) rotate to be opposite to the end parts of the limiting parts (12), the limiting wings (31) on two sides form the position maintaining structure.

2. The drainage syringe of claim 1, wherein: the edge of the limiting wing piece (31) is provided with a surrounding edge (311) extending towards one end of the injection tube (1).

3. The drainage syringe of claim 1, wherein: and a limiting structure (13) for blocking the piston (2) from disengaging is arranged on the inner wall of the other end of the injection tube (1).

4. The drainage syringe of claim 3, wherein: the limiting structure (13) is an annular convex edge.

5. A drainage syringe according to any one of claims 1 to 4, wherein: the periphery of the injection cylinder (1) is provided with an anti-skid structure (14).

Images