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

a drainage syringe

technical field

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

Background technique

In plastic surgery, negative pressure drainage is required in many places. Generally, medical staff often use a syringe as a drainage device for operation. However, in the actual operation process, the use of syringe drainage may require one hand to hold the main body of the syringe, and the other hand to continuously act on the push rod to maintain the negative pressure, or use the syringe needle cap or hemostatic forceps as an auxiliary tool, Very laborious and inconvenient to operate.

Utility model content

The technical problem to be solved by the utility model is to provide a drainage syringe, which effectively overcomes the defects of the prior art.

The technical scheme that the utility model solves the above-mentioned technical problem is as follows:

A drainage syringe, comprising a syringe barrel, a piston and a push-pull rod, one end of the above-mentioned syringe is provided with an interface, the other end is open, the above-mentioned piston is sealed and assembled inside the above-mentioned syringe, one end of the above-mentioned push-pull rod is connected with the above-mentioned piston, and the other One end extends toward the other end of the syringe barrel, and the other end of the push-pull rod is provided with a position maintaining structure, which is used to prevent the push-pull rod from retracting after the push-pull rod is pulled.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, the two sides of the other end of the above-mentioned syringe barrel are respectively provided with limit parts extending along the direction of its long axis, and the limit gaps are respectively defined between the above-mentioned limit parts on both sides, and the two sides of the other end of the above-mentioned push-pull rod are respectively There are limit fins extending vertically. In the initial state, the limit fins on both sides pass through the limit notch on both sides respectively, and the push-pull rod can be pulled along the syringe barrel under the action of external force, so that the limit The positioning fin moves in the above-mentioned limiting notch, or moves to the outer end of the above-mentioned limiting notch, and when the above-mentioned limiting fin moves to the outer end of the above-mentioned limiting notch, the above-mentioned push-pull rod can be relative to the above-mentioned syringe under the action of external force. Rotate, so that the limiting fins are rotated to face the end of the limiting portion, and the limiting fins on both sides constitute the position maintaining structure.

Further, the edge of the limiting fin is provided with a peripheral edge extending toward one end of the syringe barrel.

Further, the inner wall of the other end of the above-mentioned syringe is provided with a limiting structure for preventing the above-mentioned piston from being disengaged.

Further, the above-mentioned limiting structure is an annular convex ridge.

Further, the outer periphery of the syringe barrel is provided with a non-slip structure.

The beneficial effects of the utility model are that the structure design is simple and reasonable, the push-pull rod can be fixed by the position maintaining structure during the operation of drainage, the purpose of continuous drainage is achieved, and the operation is relatively convenient.

Description of drawings

Fig. 1 is the structural representation of the drainage syringe of the present invention;

Fig. 2 is the top view of the structure in Fig. 1;

FIG. 3 is a schematic structural diagram of the drainage syringe of the present invention in a state of negative pressure drainage.

In the accompanying drawings, the list of components represented by each number is as follows:

1. Syringe cylinder; 2. Piston; 3. Push-pull rod; 11. Interface; 12. Limiting part; 13. Limiting structure; 14. Anti-skid structure; 31. Limiting flap; 311. Surrounding edge.

Detailed ways

The principles and features of the present invention will be described below with reference to the accompanying drawings, and the examples are only used to explain the present invention, and are not intended to limit the scope of the present invention.

Embodiment: As shown in Figures 1, 2 and 3, the drainage syringe of this embodiment includes a syringe 1, a piston 2 and a push-pull rod 3. One end of the above-mentioned syringe 1 is provided with an interface 11, and the other end is open. The above-mentioned piston 2 The above-mentioned push-pull rod 3 is sealed and assembled inside the above-mentioned syringe 1, one end of the above-mentioned push-pull rod 3 is connected with the above-mentioned piston 2, and the other end of the above-mentioned push-pull rod 3 extends toward the other end of the above-mentioned syringe cylinder 1. The position maintaining structure is used to prevent the push-pull rod 3 from retracting after it is pulled.

The actual use process is as follows:

In the initial state, the piston 2 is located inside one end of the syringe 1. During drainage, connect the needle cap or drainage tube to the interface 11 at one end of the syringe 1. Next, hold the syringe 1 with one hand and operate the other hand. The push-pull rod 3 drives the piston 2 to move toward the other end of the syringe 1, and a negative pressure cavity is formed inside the syringe 1 (between the piston 2 and the interface 11), and then the relative position between the push-pull rod 3 and the syringe 1 is adjusted by the position maintaining structure. The position is maintained and positioned, so as to achieve the purpose of liberating the other hand of the medical staff, until the negative pressure cavity is filled with fluid. The entire syringe has a simple and reasonable structure design, and can use the position maintaining structure to fix the push-pull rod during operation and drainage. For the purpose of continuous drainage, the operation is more convenient.

As a preferred embodiment, the two sides of the other end of the syringe barrel 1 are respectively provided with limit portions 12 extending along the long axis direction thereof, and limit gaps are respectively defined between the limit portions 12 on both sides. Limiting fins 31 extend vertically on both sides of the other end of the push-pull rod 3 respectively. In the initial state, the limiting fins 31 on both sides pass through the limiting notch on both sides respectively, and the push-pull rod 3 can be affected by external force. Under the action of pulling along the above-mentioned syringe 1, the above-mentioned limiting fin 31 moves in the above-mentioned limiting notch, or moves to the outer end of the above-mentioned limiting notch, and when the above-mentioned limiting fin 31 moves outside the above-mentioned limiting notch After the end, the above-mentioned push-pull rod 3 can be rotated relative to the above-mentioned syringe 1 under the action of an external force, so that the above-mentioned limiting fins 31 are rotated to the end facing the above-mentioned limiting portion 12, and the above-mentioned limiting fins 31 on both sides constitute The above-mentioned position maintaining structure.

In the above embodiment, in the initial state, the limiting fins 31 are located at one end of the limiting notch. When drainage is required, the hands act on the limiting fins 31 on both sides to urge the push-pull rod 3 to move, thereby driving the piston 2 to move until The limiting fins 31 move out of the limiting notch, and then, rotate the limiting fins 31 (that is, rotate the push-pull rod 3 ), so that the limiting fins 31 on both sides face the limiting portions 12 on both sides, and the After the hand is released, the limiting fin 31 and the limiting portion 12 are in contact with each other under the action of pressure. In the current state, a negative pressure cavity of a specific volume is formed inside the syringe 1, which can effectively drain the flow.

It should be added that the length of the above-mentioned limiting portion 12 (the extension dimension along the long axis of the syringe 1 ) determines the size of the specific negative pressure formed inside the syringe 1 . The area and the size of the conventional negative pressure in the actual use process are determined, that is to say, the length dimension of the limiting portion 12 is customized according to the size of the negative pressure required for drainage, so as to realize accurate drainage operation.

As a preferred embodiment, the edge of the limiting fin 31 is provided with a peripheral edge 311 extending toward one end of the syringe 1 .

In the above embodiment, after the limiting fins 31 are moved out of the limiting notch, after the limiting fins 31 are rotated, the limiting portions 12 on both sides can be respectively located within the surrounding edges 311 of the corresponding limiting fins 31 . , and after the hand is released, the end of the limiting portion 12 will be located inside the surrounding edge 311. Since the surrounding edge 311 is relatively close to the outer periphery of the limiting portion 12, the push-pull rod 3 as a whole will not have a relatively large shake. , that is, the wrapping of the limiting portion 12 is relatively stable.

In addition, the design of the surrounding edge 311 can avoid the phenomenon of hand jamming when the limiting wing 31 moves to the limiting portion 12 when the push-pull rod 3 is pulled by holding the limiting wing 31 .

As a preferred embodiment, the inner wall of the other end of the above-mentioned syringe 1 is provided with a limiting structure 13 for preventing the above-mentioned piston 2 from being detached.

In the above embodiment, the design of the limiting structure 13 limits the maximum stroke of the piston 2 moving in the syringe 1. Specifically, when the piston 2 moves to the limiting structure 13, it will be blocked by the limiting structure 13 and cannot be moved. Continue to move, avoiding the plunger 2 being pulled out of the syringe 1.

Generally, the above-mentioned limiting structure 13 is an annular convex ridge, which is integrally processed and formed with the injection barrel 1 .

As a preferred embodiment, a non-slip structure 14 is provided on the outer periphery of the above-mentioned syringe 1 .

The design of the above-mentioned anti-skid structure 14 is convenient for the medical staff to enhance the friction force with the hand when holding the syringe 1 , so as to play the role of anti-skid.

The above-mentioned anti-slip structure 14 may be an anti-slip ridge, a plurality of evenly distributed convex points, or a plurality of evenly distributed concave points disposed on the outer surface of the normal holding part of the injection cylinder 1 .

The above-mentioned anti-slip structure 14 may also be an anti-slip rubber sleeve sleeved on the outside of the syringe 1 .

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial" The orientation or positional relationship indicated by , "radial direction", "circumferential direction", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying the indicated device. Or the elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

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

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection connected, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication between two elements or the interaction between the two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features through an intermediary indirect contact. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed 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, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limitations of the present invention, and those of ordinary skill in the art are within the scope of the present invention Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (5)

1. A drainage syringe, characterized in that: comprising a syringe (1), a piston (2) and a push-pull rod (3), one end of the syringe (1) is provided with an interface (11), and the other end is openly provided, The piston (2) is sealed and assembled inside the syringe (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) faces the other end of the syringe (1). The opening extends, the other end of the push-pull rod (3) is provided with a position maintaining structure, and the position maintaining structure is used to prevent the push-pull rod (3) from retracting after it is pulled; the syringe barrel (1) Limiting portions (12) extend along the long axis direction on both sides of the other end portion of the push-pull rod (3) Limiting fins (31) extend vertically on both sides of the other end respectively. In the initial state, the limiting fins (31) on both sides respectively pass through the limiting notch on both sides, and the push-pull rod (31). 3) It can be pulled along the syringe (1) under the action of external force, so that the limiting fin (31) moves in the limiting notch, or moves to the outer end of the limiting notch, and when After the limiting fin (31) moves to the outer end of the limiting notch, the push-pull rod (3) can be rotated relative to the syringe (1) under the action of an external force, so that the limiting fin (3) can be rotated The piece (31) is rotated to face the end of the limiting portion (12), and the limiting fins (31) on both sides constitute the position maintaining structure. 2 . The drainage syringe according to claim 1 , wherein the edge of the limiting fin ( 31 ) is provided with a peripheral edge ( 311 ) extending toward one end of the syringe ( 1 ). 3 . 3 . The drainage syringe according to claim 1 , wherein a limiting structure ( 13 ) for blocking the separation of the piston ( 2 ) is provided on the inner wall of the other end of the syringe ( 1 ). 4 . 4 . The drainage syringe according to claim 3 , wherein the limiting structure ( 13 ) is an annular convex ridge. 5 . 5. A drainage syringe according to any one of claims 1 to 4, wherein a non-slip structure (14) is provided on the outer periphery of the syringe barrel (1).

Images