A new negative pressure drainage device

Abstract

The utility model relates to a novel negative pressure drainage device, including plastic film pipe body, the upper end cover is bonded with the upper end of plastic film pipe body, and the lower end bonding has lower bottom plate, still include auxiliary device, and the auxiliary device includes base, fixed link and pressing plate, and fixed link is equipped with a plurality of annular grooves along the longitudinal direction, and the rotatable annular clamping block is sleeved on the annular groove, and the outer diameter size of annular clamping block is same with the diameter size of fixed link, and the one end of annular clamping block is provided with the fender outward and extends, and the annular sleeve of fixed link is sleeved on the both ends of pressing plate, and the hollow space in -side of annular sleeve is provided as the space for retention and extends outward, and the space for retention can completely cover the fender of annular clamping block on the orthographic projection plane, so that the annular sleeve can pass through the fender when fixed link vertical movement. The device realizes flexible adjustment multistage compression amount, and the use is convenient, and the transformation cost is low.

Description

Technical Field

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

[0002] Negative pressure drainage is a new technology that has gradually developed in recent years and can be used to treat wounds. It uses negative pressure products to generate a certain negative pressure on the wound to absorb wound exudate and promote wound healing. The negative pressure drainage device is an important medical tool in this technology.

[0003] Existing negative pressure drainage devices have a cylindrical structure with a soft plastic tube as the sidewall. A reset spring is built into the tube, and the top cap of the cylindrical body has an opening for connecting the drainage tube and an opening with an air valve. During use, the air valve is opened and manually pressed to release air, creating negative pressure for drainage. This manual operation makes it impossible to quantify the drainage volume, which is very inconvenient for patients with small amounts of fluid accumulation. Furthermore, when manually applying negative pressure, the soft plastic tube requires considerable force with one hand to maintain the device's compression under the reaction force of the reset spring, while the other hand closes the air valve, making the operation cumbersome and prone to error.

[0004] Patent publication number CN208626287U discloses a drainage-type negative pressure drainage device. It features a pressure plate on each end of a corrugated plastic tube, connected by a hook. The pressure plates compress the corrugated plastic tube, resulting in more even force distribution. After compression, the hooks hold the pressure plates in place, maintaining the compression state. The air valve, sealing cap, or roller switch is then closed. When negative pressure is needed, the hooks are released, and a return spring expands the corrugated plastic tube, drawing the patient's accumulated fluid into the tube. However, this design requires significant improvements to existing drainage devices, undoubtedly increasing production costs. Furthermore, the fixed hook length limits the compression to a single level, preventing multi-level compression adjustments and making it inflexible. Utility Model Content

[0005] This invention provides a novel negative pressure drainage device that allows for flexible adjustment of multiple compression levels, is easy to use, and has low modification costs.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A novel negative pressure drainage device includes a plastic membrane tube with an upper cap bonded to its upper end and a lower base plate bonded to its lower end. A return spring is installed inside the plastic membrane tube. The upper cap has an air outlet for an air valve and a drainage port for connecting to a drainage tube. The device also includes an auxiliary device comprising a base, fixed rods on both sides of the base with the same diameter, and pressure plates that are sleeved on the fixed rods at both ends and can move up and down. The fixed rods have several annular grooves along their longitudinal direction, and rotatable annular blocks are sleeved on the annular grooves. The outer diameter of the annular blocks is the same as the diameter of the fixed rods, and one end of each annular block extends outward with a stop. The pressure plates are connected by connecting rods to annular sleeves sleeved on the fixed rods. The hollow space inside the annular sleeves extends outward to form a retention space, which completely covers the stop of the annular blocks on the orthographic projection plane, allowing the annular sleeves to pass through the stop when the fixed rods move vertically.

[0008] Preferably, the top of the fixing rod is provided with a limiting post with a diameter larger than that of the annular sleeve.

[0009] Preferably, one side of the pressure plate is provided with two notches that are adapted to the air outlet valve and the drain pipe, respectively.

[0010] Preferably, the upper surface of the base is provided with a shallow groove whose shape is adapted to the lower base plate.

[0011] Preferably, the upper surface of the base is provided with a baffle extending toward the shallow groove.

[0012] Preferably, several of the annular grooves are set to correspond to 1 / 3, 1 / 2 and 2 / 3 of the height of the plastic film tube, and the corresponding numbers are marked on the side of the corresponding annular grooves.

[0013] Preferably, the pressure plate extends outward from one side of the air outlet and the inlet to form an extension, and the extension is provided with a plurality of parallel anti-slip textures.

[0014] The above-mentioned technical solution of this utility model has the following beneficial effects:

[0015] This novel negative pressure drainage device adds an auxiliary device to the existing device. The existing device is placed directly on the auxiliary device. The compression is adjusted by vertically moving a pressure plate on a fixed rod above the drainage device. When the desired compression is reached, the upper stop of the corresponding annular locking block is rotated to limit the compression. This allows for independent adjustment of multiple compression levels. The locking mechanism also eliminates the hassle of manual operation. The air valve, sealing cap, or roller switch can be closed when the pressure is released. The device is simple to operate, flexible in adjustment, and compatible with existing negative pressure drainage devices. One auxiliary device can be used multiple times with the drainage device, resulting in low manufacturing cost and high practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the auxiliary device of this utility model;

[0017] Figure 2 This is an enlarged schematic diagram of the annular sleeve portion;

[0018] Figure 3 This is a schematic diagram of the overall structure of the novel negative pressure drainage device of this utility model. Detailed Implementation

[0019] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings and examples.

[0020] This utility model discloses a novel negative pressure drainage device. Figure 3 As shown, the device includes a plastic film tube 1, with an upper end cap 10 bonded to its upper end and a lower base plate 11 bonded to its lower end. A return spring 12 is installed inside the plastic film tube 1. The upper end cap 10 has an air outlet for an air valve and a drainage port for connecting to a drainage tube. Furthermore, the drainage device also includes auxiliary devices; please refer to [link to relevant documentation]. Figure 1-2 As shown, the auxiliary device includes a base 20, a fixing rod 21 fixed to both sides of the base 20 with the same diameter, and a pressure plate 22 with both ends sleeved on the fixing rod 21 and movable up and down. The fixing rod 21 has several annular grooves along its longitudinal direction. A rotatable annular locking block 23 is sleeved on the annular groove. The outer diameter of the annular locking block 23 is the same as the diameter of the fixing rod 21. One end of the annular locking block 23 extends outward and is provided with a stop 24. The two ends of the pressure plate 22 are provided with annular sleeves 25 sleeved on the fixing rod 21 through connecting rods 34. The hollow space inside the annular sleeve 25 extends outward to form a retention space. The retention space can completely cover the stop of the annular locking block 23 on the orthographic projection plane, so that the annular sleeve 25 can pass through the stop 24 when the fixing rod 21 moves vertically. In use, the position of the stop of the annular block is set to correspond to the position of the space left by the annular sleeve. At this time, the annular sleeve can move freely downward on the fixed rod. When it moves to the position of the required compression amount, rotate the annular block corresponding to the compression amount, and turn the stop to the outside to abut against the top of the annular sleeve, thereby achieving the limit.

[0021] In an improved example, to better position the stop corresponding to the space of the annular sleeve, a protruding ridge 26 is provided above the stop 24, and a blocking plate 27 is provided on the fixing rod 21 facing the stop 24 and overlapping the protruding ridge 26 in the same radial direction; when the stop 24 is rotated to the space, the protruding ridge 26 on the stop 24 is exactly blocked on one side of the blocking plate 27.

[0022] The top of the fixing rod 21 is provided with a limiting post 28 with a diameter larger than that of the annular sleeve 25 to prevent the pressure plate 22 from falling off from above the fixing rod 21 when it is moved.

[0023] The pressure plate 22 has two notches 29 on one side that are adapted to the air outlet valve and the drain pipe, respectively, which can further stabilize the position of the pressure plate and the drain device.

[0024] The upper surface of the base 20 is provided with a shallow groove 31 whose shape is adapted to the lower base plate 11. When in use, the lower base plate 11 can be placed directly in the shallow groove 31 to avoid displacement of the lower base plate.

[0025] The upper surface of the base 20 is provided with a baffle 32 extending toward the shallow groove 31, which can further limit the position of the lower base plate.

[0026] The position of the annular groove of the fixing rod can be set according to the required compression amount. In this example, several annular grooves are set to correspond to 1 / 3, 1 / 2 and 2 / 3 of the height of the plastic film tube, and the corresponding numbers are marked on the side of the corresponding annular groove.

[0027] The pressure plate 22 extends outward from the side of the air outlet and the inlet to form an extension 33, and the extension 33 is provided with multiple parallel anti-slip patterns. By increasing the pressure-bearing area, the force required for pressing is reduced.

[0028] When using this utility model device Figure 3 As shown, the lower base plate of the drainage device is placed in the shallow groove of the base, and the pressure plate is placed on the upper surface of the upper end cover. At this time, the position of the stop of the annular locking block is set to correspond to the position of the reserved space of the annular sleeve, and the annular sleeve can move freely downward on the fixing rod. When it moves to the position of the required compression amount, the annular locking block corresponding to the compression amount is rotated, and the stop is turned to the outside to abut against the top of the annular sleeve, thereby achieving the limit. Multiple levels of adjustment can be made through different compression amounts, making it flexible to use.

[0029] This utility model auxiliary device is applicable to existing new negative pressure drainage devices. One auxiliary device can be used multiple times in conjunction with the drainage device. It has low manufacturing cost and high practicality.

[0030] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A new type of negative pressure drainage device, comprising a plastic film tube body, an upper end cover is bonded to the upper end of the plastic film tube body, and a lower bottom plate is bonded to the lower end of the plastic film tube body; a reset spring is installed in the plastic film tube body, an air outlet with an air valve and a drainage port connected with a drainage tube are arranged on the upper end cover; characterized in that, The auxiliary device comprises a base, a fixing rod fixed on both sides of the base with the same diameter, and a pressing plate movably sleeved on the fixing rod and movable up and down, the fixing rod is provided with a plurality of annular grooves in the longitudinal direction, a rotatable annular clamping block is sleeved on the annular groove, the outer diameter of the annular clamping block is the same as the diameter of the fixing rod, and a blocking portion is arranged at one end of the annular clamping block and extends outward; the two ends of the pressing plate are connected through connecting rods, and an annular sleeve sleeved on the fixing rod is connected, a storage space is arranged on the outside of the hollow space of the annular sleeve and extends outward, the storage space can completely cover the blocking portion of the annular clamping block in the orthographic projection plane, so that the annular sleeve can pass through the blocking portion when the fixing rod moves vertically.

2. The novel negative pressure wound therapy device of claim 1, wherein, The top of the fixing rod is provided with a limiting column with a diameter larger than that of the annular sleeve.

3. The novel negative pressure wound therapy device of claim 1, wherein, One side of the pressing plate is provided with two notches respectively matched with the air outlet valve and the drainage pipe.

4. The novel negative pressure wound therapy device of claim 1, wherein, The upper surface of the base is provided with a shallow groove matched with the lower bottom plate.

5. The novel negative pressure wound therapy device of claim 4, wherein, The upper surface of the base is provided with a blocking strip extending towards the shallow groove.

6. The novel negative pressure wound therapy device of claim 1, wherein, A plurality of annular grooves are arranged corresponding to 1 / 3, 1 / 2 and 2 / 3 of the height of the plastic film tube body, and corresponding numbers are marked on the corresponding sides of the annular grooves.

7. The novel negative pressure wound therapy device of claim 1, wherein, The side of the pressing plate deviated from the air outlet and the drainage port extends outward to form an extension, and a plurality of anti-skid lines arranged in parallel are arranged on the extension.

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