A limiter for a syringe negative pressure drainage device

Abstract

This utility model relates to the field of medical devices, and in particular to a limiter for a syringe negative pressure drainage device. The limiter of this utility model includes a semi-annular limiting body, which has a limiting telescopic part extending or retracting towards one end, and a quick-release connection part at the other end that mates with a hook at the open end of the syringe barrel. Advantages: The structure is simple and reasonable, and it can position the syringe piston rod during the process of generating negative pressure for drainage by pulling the piston rod outward, thereby accurately controlling the negative pressure and avoiding the problem of negative pressure drainage failure due to unstable positioning of the syringe piston rod returning to its original position.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a limiter for a syringe negative pressure drainage device. Background Technology

[0002] Clinically, plastic surgery hospitals commonly use 20ml syringes as negative pressure drainage devices during procedures such as facial wrinkle removal, maxillofacial surgery, and limb expander implantation or removal. During drainage, the syringe plunger is pulled outwards and supported by a cylindrical component (such as the syringe needle cap) between the syringe's hanging lug and the end of the plunger, thus maintaining negative pressure in the syringe. However, this method frequently results in the syringe needle cap detaching or breaking open during the procedure, increasing both patient discomfort and the workload for nurses.

[0003] Therefore, it is necessary to develop a limiter for a syringe negative pressure drainage device to overcome the above-mentioned technical problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a limiter for a syringe negative pressure drainage device, which effectively overcomes the defects of the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A limiter for a syringe negative pressure drainage device includes a semi-annular limiting body, the limiting body having a limiting telescopic part that extends or retracts toward one end, and the other end of the limiting body having a quick-release connection part that is adapted to the hook of the syringe barrel opening end.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the aforementioned limiting body has an inner cavity with a semi-circular cross-section between its two ends. A semi-circular piston is sealed in the inner cavity. One end of the aforementioned limiting telescopic part is connected to the piston, and the other end passes through one end of the aforementioned limiting body. The aforementioned limiting body is provided with a drive assembly for pushing the piston to move along the inner cavity.

[0009] Furthermore, the aforementioned limiting telescopic part includes a semi-circular telescopic plate and a semi-circular stop plate disposed at one end of the telescopic plate, and one end of the telescopic plate is connected to the piston.

[0010] Furthermore, the aforementioned driving component includes a liquid injection port disposed at the other end of the aforementioned limiting body. The liquid injection port is connected to a columnar liquid cavity. The end of the columnar liquid cavity away from the liquid injection port is open, and a pusher that can extend and retract along the columnar liquid cavity is sealed in the open. The columnar liquid cavity is filled with a liquid medium.

[0011] Furthermore, the aforementioned injection component includes a flexible injection head and an injection rod. The injection head is sealed within the aforementioned cylindrical liquid cavity. One end of the injection rod is connected to the injection head, and the other end extends out of the opening at one end of the aforementioned cylindrical liquid cavity. A drive structure connected to the injection rod is provided at the opening at one end of the aforementioned cylindrical liquid cavity. The drive structure is used to drive the injection rod to move.

[0012] Furthermore, the aforementioned injection rod is a screw, and the aforementioned driving structure is an annular rotating wheel that is rotatably mounted at one open end of the aforementioned cylindrical liquid cavity. The inner ring of the aforementioned rotating wheel is provided with an internal thread that is adapted to the aforementioned injection rod. The aforementioned injection rod passes through the aforementioned rotating wheel and is threadedly connected to each other. The surface of the aforementioned injection rod is provided with guide grooves extending to both ends thereon, and the inner side of one open end of the aforementioned cylindrical liquid cavity is provided with a guide block that is embedded in the aforementioned guide groove.

[0013] Furthermore, the aforementioned columnar liquid cavity is perpendicular or parallel to the aforementioned limiting body.

[0014] Furthermore, the aforementioned limiting body has an inner cavity with a semi-circular cross-section between its two ends, and the aforementioned limiting telescopic part has a semi-circular cross-section with one end extending into the inner cavity of the aforementioned limiting body. An elastic element is connected between one end of the aforementioned limiting telescopic part and the corresponding end of the aforementioned limiting body. A tightening bolt is threaded onto the outer surface of the aforementioned limiting body, and the tightening bolt is used to be tightened until it abuts against or separates from the aforementioned limiting telescopic part.

[0015] Furthermore, the quick-release connector includes a flat card holder with slots extending to one end and both sides, and the hook-on ear is inserted into the slot.

[0016] Furthermore, each of the two sides of the other end of the aforementioned limiting body is connected to a quick-release connector, and the two hooks of the syringe syringe are respectively inserted into the quick-release connectors on both sides.

[0017] The beneficial effects of this utility model are: the structure is simple and reasonable, and it can position the position of the syringe piston rod during the process of generating negative pressure for drainage by pulling the syringe piston rod outward, thereby accurately controlling the negative pressure and avoiding the problem of negative pressure drainage failure caused by the syringe piston rod returning to its original position due to unstable positioning. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the limiter of the syringe negative pressure drainage device of this utility model;

[0019] Figure 2 This is a schematic diagram of another embodiment of the limiter of the syringe negative pressure drainage device of this utility model;

[0020] Figure 3 This is a schematic diagram of the limiting body in the syringe negative pressure drainage device of this utility model;

[0021] Figure 4 This is a schematic diagram of the cylindrical liquid cavity in the syringe negative pressure drainage device of this utility model.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Limiting body; 3. Columnar liquid cavity; 4. Injection pusher; 11. Limiting telescopic part; 12. Quick-release connection part; 13. Piston; 41. Injection head; 42. Injection rod; 43. Drive structure; 51. Elastic element; 52. Tightening bolt; 111. Telescopic plate; 112. Stop plate. Detailed Implementation

[0024] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0025] Example

[0026] like Figure 1 , 2 As shown in Figure 3, the limiter of the syringe negative pressure drainage device in this embodiment includes a semi-annular limiting body 1. The limiting body 1 is provided with a limiting telescopic part 11 that extends or retracts toward one end, and the other end of the limiting body 1 is provided with a quick-release connecting part 12 that is adapted to the hook of the syringe barrel opening end.

[0027] The syringe negative pressure drainage device of this embodiment adjusts its extension length according to the position of the piston rod that needs to be maintained for syringe negative pressure drainage. The specific usage process is as follows:

[0028] The quick-release connector 12 is assembled with the lugs on both sides of the syringe barrel port, allowing the limiting body 1 to partially surround the syringe piston rod and be positioned between the lugs and the pressing plate (or pressing part) at the end of the syringe. The length of the entire limiting device is adjusted by the extension and retraction of the limiting telescopic part 11, so that both ends of the limiting device abut against the open end of the syringe barrel and the pressing plate, respectively, thereby restricting the position of the piston rod. The entire limiting device structure is simple and reasonable in design, and can position the syringe piston rod during the process of generating negative pressure for drainage by pulling the syringe piston rod outward, thereby accurately controlling the negative pressure and avoiding the problem of negative pressure drainage failure due to unstable positioning of the syringe piston rod returning to its original position. The entire device can improve drainage efficiency, reduce patient discomfort caused by long operation time, enhance the stability of the limiting structure, and simplify medical staff operations.

[0029] As a preferred implementation method, such as Figure 1 As shown, the limiting body 1 has an inner cavity with a semi-circular cross-section between its two ends. A semi-circular piston 13 is sealed in the inner cavity. One end of the limiting telescopic part 11 is connected to the piston 13, and the other end passes through one end of the limiting body 1. The limiting body 1 is provided with a drive assembly for pushing the piston 13 to move along the inner cavity.

[0030] In the above implementation, the piston 13 is pushed to move between the two ends along the inner cavity of the limiting body 1 by the driving component, thereby adjusting the extension length of the limiting telescopic part 11 so that its length is consistent with the distance between the pulled-out hanging ear and the piston rod end pressing piece, thereby fixing the position of the piston rod, so that a stable and precise negative pressure is formed in the syringe, and the operation is relatively convenient.

[0031] In a preferred embodiment, the limiting telescopic part 11 includes a semi-circular telescopic plate 111 and a semi-circular stop plate 112 disposed at one end of the telescopic plate 111, and one end of the telescopic plate 111 is connected to the piston 13.

[0032] In the above implementation scheme, the design of the stop plate 112 increases the contact area between it and the pressing piece at the end of the piston rod, making the support and limiting more stable.

[0033] In a preferred embodiment, the drive assembly includes a liquid inlet located at the other end of the limiting body 1. The liquid inlet is connected to a columnar liquid cavity 3. The columnar liquid cavity 3 is open at one end away from the liquid inlet, and a pusher 4 that moves along the columnar liquid cavity 3 is sealed in the open end. The columnar liquid cavity 3 is filled with a liquid medium.

[0034] In the above implementation scheme, the drive component adopts a structure in which the piston 13 is moved by hydraulic injection. Specifically, the medium in the cylindrical liquid chamber 3 is pushed into the inner cavity of the limiting body 1 by the injection component 4, thereby pushing the piston 13 to move towards one end of the lower limiting body 1, so that the limiting telescopic part 11 is extended. After the injection force is removed (that is, after the injection component 4 moves back to its original position), the medium will lose the thrust on the piston 13, and the piston 13 and the limiting telescopic part 11 can move back to their original position (contracted state). The design is quite ingenious.

[0035] As a preferred implementation method, such as Figure 4 As shown, the above-mentioned injection component 4 includes a flexible injection head 41 and an injection rod 42. The injection head 41 is sealed in the columnar liquid cavity 3. One end of the injection rod 42 is connected to the injection head 41, and the other end extends out of the opening of one end of the columnar liquid cavity 3. A drive structure 43 connected to the injection rod 42 is provided at the opening of one end of the columnar liquid cavity 3. The drive structure 43 is used to drive the injection rod 42 to move.

[0036] In the above implementation scheme, the driving structure 43 drives the injection rod 42 to move the injection head 41 in the columnar liquid cavity 3, thereby realizing "hydraulic drive" and causing the piston 13 to move or return to one end of the lower limit body 1.

[0037] In a preferred embodiment, the aforementioned injection rod 42 is a screw, and the aforementioned drive structure 43 is an annular rotating wheel rotatably mounted at one open end of the aforementioned cylindrical liquid cavity 3. The inner ring of the aforementioned rotating wheel is provided with an internal thread adapted to the aforementioned injection rod 42. The aforementioned injection rod 42 passes through the aforementioned rotating wheel and is threadedly connected to each other. The surface of the aforementioned injection rod 42 is provided with guide grooves extending to both ends thereon, and the inner side of one open end of the aforementioned cylindrical liquid cavity 3 is provided with a guide block embedded in the aforementioned guide groove.

[0038] In the above implementation scheme, during adjustment, the rotating wheel is rotated. Due to the threaded connection between the rotating wheel and the injection rod 42, as well as the cooperation between the injection rod 42 and the guide block, the injection rod 42 can only move along its long axis, thereby realizing the reciprocating movement of the injection head 41. The operation only requires rotating the rotating wheel, which is very quick and convenient.

[0039] In this embodiment, the columnar liquid cavity 3 is perpendicular to or parallel to the limiting body 1.

[0040] As a preferred implementation method, such as Figure 2As shown, the limiting body 1 has an inner cavity with a semi-circular cross-section between its two ends. The limiting telescopic part 11 has a semi-circular cross-section, with one end extending into the inner cavity of the limiting body 1. An elastic element 51 is connected between one end of the limiting telescopic part 11 and the corresponding end of the limiting body 1. A tightening bolt 52 is threaded onto the outer surface of the limiting body 1. The tightening bolt 52 is used to be tightened until it abuts against or separates from the limiting telescopic part 11.

[0041] In the above implementation scheme, the limiting telescopic part 11 can be extended by pulling outward after the tightening bolt 52 is loosened. Then, the tightening bolt 52 can be tightened to fix it. When retracting, the operation can be reversed. The operation is very simple and quick.

[0042] In a preferred embodiment, the quick-release connector 12 includes a flat card holder with slots extending to one end and both sides therein, and the hook-on ear is inserted into the slot.

[0043] In the above implementation scheme, the card holder adopts a C-shaped structural design, which is adapted to the shape and size of the hanging ear at the syringe port. The hanging ear can be embedded in the slot of the card holder to achieve stable assembly of the entire limiter at the syringe port.

[0044] In this embodiment, a quick-release connecting part 12 is connected to each of the two sides of the other end of the limiting body 1, and the two hooks of the syringe barrel are respectively inserted into the quick-release connecting parts 12 on both sides. The quick-release connecting parts 12 are provided on both sides of the limiting body 1, corresponding one-to-one with the hooks on both sides of the syringe port, so that the assembly of the limiting device at the syringe port is more stable.

[0045] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A limiter for a syringe negative pressure drainage device, characterized in that: It includes a semi-annular limiting body (1), the limiting body (1) having a limiting telescopic part (11) extending or retracting toward one end, and the other end of the limiting body (1) having a quick-release connecting part (12) adapted to the hook of the syringe barrel opening end.

2. The limiter of a negative pressure drainage device of a syringe according to claim 1, characterized in that: The limiting body (1) has an inner cavity with a semi-circular cross-section between its two ends. A semi-circular piston (13) is sealed in the inner cavity. One end of the limiting telescopic part (11) is connected to the piston (13), and the other end passes through one end of the limiting body (1). The limiting body (1) is provided with a driving component for pushing the piston (13) to move along the inner cavity.

3. The limiter of a negative pressure drainage device of a syringe according to claim 2, characterized in that: The limiting telescopic part (11) includes a semi-circular telescopic plate (111) and a semi-circular stop plate (112) disposed at one end of the telescopic plate (111), and one end of the telescopic plate (111) is connected to the piston (13).

4. The limiter of a negative pressure drainage device of a syringe according to claim 2, characterized in that: The driving component includes an injection port located at the other end of the limiting body (1), the injection port being connected to a columnar liquid cavity (3), the columnar liquid cavity (3) being open at one end away from the injection port, and a pusher (4) that moves along the columnar liquid cavity (3) is sealed in the open end, the columnar liquid cavity (3) being filled with a liquid medium.

5. The limiter of a negative pressure wound therapy device according to claim 4, characterized in that The injection component (4) includes a flexible injection head (41) and an injection rod (42). The injection head (41) is sealed in the columnar liquid cavity (3). One end of the injection rod (42) is connected to the injection head (41), and the other end extends out of the opening of one end of the columnar liquid cavity (3). A drive structure (43) connected to the injection rod (42) is provided at the opening of one end of the columnar liquid cavity (3). The drive structure (43) is used to drive the injection rod (42) to move.

6. The limiter of the syringe negative pressure drainage device according to claim 5, characterized in that: The injection rod (42) is a screw, and the driving structure (43) is a circular rotating wheel that is rotatably mounted at one end of the columnar liquid cavity (3). The inner ring of the rotating wheel is provided with an internal thread that is adapted to the injection rod (42). The injection rod (42) passes through the rotating wheel and is threadedly connected to each other. The surface of the injection rod (42) is provided with guide grooves extending to both ends. The inner side of one end of the columnar liquid cavity (3) is provided with a guide block embedded in the guide groove.

7. The limiter of a negative pressure wound therapy device according to claim 4, characterized in that: The columnar liquid cavity (3) is perpendicular or parallel to the limiting body (1).

8. The limiter of a negative pressure wound therapy device according to claim 1, characterized in that: The limiting body (1) has an inner cavity with a semi-circular cross-section between its two ends. The limiting telescopic part (11) has a semi-circular cross-section, with one end extending into the inner cavity of the limiting body (1). An elastic element (51) is connected between one end of the limiting telescopic part (11) and the corresponding end of the limiting body (1). A tightening bolt (52) is threaded onto the outer surface of the limiting body (1). The tightening bolt (52) is used to be tightened until it abuts against or separates from the limiting telescopic part (11).

9. The limiter of a negative pressure wound therapy device according to any one of claims 1 to 8, characterized in that: The quick-release connector (12) includes a flat card holder with slots extending to one end and both sides therein, and the hook ear is embedded in the slot.

10. The limiter of a negative pressure wound therapy device according to claim 9, characterized in that Two said quick release connecting parts (12) are connected to the two sides of the other end of the limiting main body (1), and the two hanging ears of the syringe barrel are inserted into the two said quick release connecting parts (12) respectively.

Images