Simple negative pressure aspirator

Abstract

The utility model discloses a simple negative pressure aspirator which comprises an aspiration cylinder, a containing cavity is formed in the aspiration cylinder, one end of the aspiration cylinder is provided with an aspiration opening and a connecting hose, one end of the connecting hose is communicated with the containing cavity, the other end of the connecting hose forms a connecting end, a plurality of sealing blocks are arranged in the connecting end in the circumferential direction, and the sealing blocks abut against one another to seal the connecting end. A pressure control cavity is formed in the negative pressure cylinder, an opening is formed in one end of the negative pressure cylinder, a piston is arranged in the pressure control cavity in a sealed and sliding mode, an inserting end is formed at the front end of the negative pressure cylinder, and the inserting end is used for being connected with the connecting end in an inserting mode and enabling the sealing blocks to be separated from one another so that the pressure control cavity can communicate with the containing cavity; through the arrangement of the sealing block, after the negative pressure cylinder is separated from the connecting hose, the connecting end is automatically blocked and sealed, and then positive pressure is prevented from being generated in the containing cavity, so that negative pressure is provided for the containing cavity again after the piston is readjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a simple negative pressure aspirator. Background Art

[0002] In clinical practice, wound infection, suction, etc. often require the use of suction equipment to perform continuous negative pressure suction on the wound. However, most of today's hospital suction equipment requires a central negative pressure interface supply, which has a high cost and is not suitable for small-scale operation needs.

[0003] In response to this, there are some simple negative pressure devices for small operations in clinical practice today. For example, referring to the prior patent with application number CN201721046166.2, a simple continuous negative pressure aspirator is specifically disclosed, which provides continuous negative pressure by syringe suction. However, the above method still has the following defects: after continuous negative pressure suction, the negative pressure will drop significantly, and the suction tube core rod needs to be pushed back and forth again to regain the negative pressure. Positive pressure will be generated in the process of pushing the suction tube core rod, which will affect the suction effect of the wound and cause blood in the sponge to overflow, so it needs to be improved. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a simple negative pressure aspirator to provide continuous negative pressure aspiration and avoid poor aspiration caused by the generation of positive pressure.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A simple negative pressure suction device comprises a suction tube, a receiving cavity is formed in the suction tube, and a suction port is formed at one end of the suction tube;

[0007] A connecting hose, one end of which is in communication with the accommodating cavity, and the other end of which forms a connecting end, wherein a plurality of sealing blocks are arranged in the inner circumference of the connecting end, and the plurality of sealing blocks are used to contact each other to seal the connecting end;

[0008] A negative pressure cylinder, wherein a pressure control chamber is formed inside the negative pressure cylinder, an opening is formed at one end of the negative pressure cylinder, a piston is provided in the pressure control chamber for sealing and sliding, a plug-in end is formed at the front end of the negative pressure cylinder, and the plug-in end is used for plugging into the connecting end and separating multiple sealing blocks from each other, so that the pressure control chamber and the accommodating chamber are connected to each other.

[0009] As a further improvement of the present invention, a receiving groove is provided at the plug-in end corresponding to the sealing block, and when the plug-in end is plugged into the connecting end, the sealing block is received in the receiving groove.

[0010] As a further improvement of the utility model, the connecting end is provided with a sealing ring, and the plug-in end is provided with a ring groove corresponding to the sealing ring. When the plug-in end is plugged into the connecting end, the sealing ring is engaged with the ring groove.

[0011] As a further improvement of the utility model, a card is also included, the piston includes a plug body and a control rod, the control rod is provided with a card slot along the length direction, the card includes a card edge, the card edge is carded with the control rod through the card slot, and the card is used to abut against the opening to limit the control rod from moving toward the negative pressure cylinder.

[0012] As a further improvement of the present invention, the card is semicircular.

[0013] As a further improvement of the utility model, scales are provided on the suction cylinder and the negative pressure cylinder.

[0014] As a further improvement of the utility model, a deformation layer is provided at the suction port.

[0015] Beneficial effects of the utility model:

[0016] 1. The sealing block is provided to automatically seal the connection end after the negative pressure cylinder is separated from the connecting hose, thereby avoiding the generation of positive pressure in the accommodating chamber, so that the piston can be readjusted to provide negative pressure for the accommodating chamber again;

[0017] 2. The automatic plugging seal of the connecting hose can increase the negative pressure in the suction cylinder by repeatedly sucking the negative pressure cylinder, thereby obtaining a larger negative pressure range in the accommodating chamber to meet different operation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall installation section of the utility model;

[0019] Figure 2 for Figure 1 A partial enlarged view;

[0020] Figure 3 This is a schematic diagram of the initial state of the sealing block of the utility model;

[0021] Figure 4 This is a schematic diagram of the card installation of the utility model.

[0022] Figure numerals: 1. suction cylinder; 2. accommodating chamber; 3. suction port; 4. connecting hose; 5. connecting end; 6. sealing block; 7. negative pressure cylinder; 8. pressure control chamber; 9. opening; 10. piston; 11. plug end; 12. accommodating groove; 13. sealing ring; 14. ring groove; 15. card; 16. plug body; 17. control rod; 18. card slot; 19. scale; 20. deformation layer. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, wherein the same components are indicated by the same reference numerals.

[0024] like Figure 1-4 As shown, the simple negative pressure suction device comprises a suction tube 1, a receiving cavity 2 is formed in the suction tube 1, and a suction port 3 is formed at one end of the suction tube 1.

[0025] It also includes a connecting hose 4, which is made of silicone material. One end of the connecting hose 4 is connected to the accommodating chamber 2, and the other end forms a connecting end 5. A plurality of sealing blocks 6 are circumferentially arranged in the connecting end 5. The plurality of sealing blocks 6 are used to contact each other to seal the connecting end 5. Specifically, the number of the sealing blocks 6 is 4, and the front end thereof is conical to ensure the sealing effect on the connecting end 5.

[0026] It also includes a negative pressure cylinder 7, a pressure control chamber 8 is formed in the negative pressure cylinder 7, an opening 9 is formed at one end of the negative pressure cylinder 7, a piston 10 is sealingly and slidingly provided in the pressure control chamber 8, and a plug-in end 11 is formed at the front end of the negative pressure cylinder 7. The plug-in end 11 is used to plug in the connecting end 5 and separate the multiple sealing blocks 6 from each other, so that the pressure control chamber 8 and the accommodating chamber 2 are connected to each other.

[0027] When in use, the two ends of the connecting hose 4 are respectively connected to the suction cylinder 1 and the negative pressure cylinder 7, and the suction port 3 is further aligned with the operating area, and the suction port 3 is attached and closed to the operating area, that is, a closed area is formed in the accommodating chamber 2. At this time, the piston 10 is located at the bottom of the pressure control chamber 8, and there is no negative pressure in the accommodating chamber 2. The piston 10 is further pulled to generate a continuous negative pressure in the accommodating chamber 2. When it is necessary to adjust the negative pressure in the accommodating chamber 2, the plug-in end 11 and the connecting end 5 can be separated. At this time, the connecting end 5 is re-sealed by the sealing block 6, and the piston 10 is further moved to the bottom of the pressure control chamber 8 again, and the plug-in end 11 is re-connected with the connecting end 5 to re-adjust the negative pressure in the accommodating chamber 2. The above method can effectively avoid the adverse effects of the positive pressure generated when the piston 10 is moved again on the accommodating chamber 2, thereby always maintaining the negative pressure suction of the accommodating chamber 2. At the same time, the negative pressure range of the accommodating chamber 2 can be effectively expanded by adjusting the piston 10 multiple times. At the same time, the overall structure is simple, which is convenient for small-scale operation needs.

[0028] Preferably, the negative pressure tube 7 and the suction tube 1 are both made of transparent plastic material to further reduce costs and facilitate observation by medical staff.

[0029] Preferably, a receiving groove 12 is provided at the plug-in end 11 corresponding to the sealing block 6 , and when the plug-in end 11 is plugged into the connecting end 5 , the sealing block 6 is received in the receiving groove 12 .

[0030] By accommodating the sealing block 6 in the accommodating groove 12, it is possible to avoid the formation of a gap between the connecting hose 4 and the plug-in end 11 due to the presence of the sealing block 6 after the plug-in end 11 is plugged in, thereby preventing the sealing from failing. At the same time, the accommodation of the sealing block 6 can also avoid the risk of the connecting hose 4 and the plug-in end 11 falling off, thereby improving the connection stability.

[0031] Preferably, the connection end 5 is provided with a sealing ring 13 , and the plug end 11 is provided with an annular groove 14 corresponding to the sealing ring 13 . When the plug end 11 is plugged into the connection end 5 , the sealing ring 13 is engaged with the annular groove 14 .

[0032] The provision of the sealing ring 13 can further improve the sealing performance of the connection end 5 and the plug end 11 after being plugged together, and can also further improve the connection stability between the connection end 5 and the plug end 11 .

[0033] Preferably, a card 15 is also included, the piston 10 includes a plug body 16 and a control rod 17, the control rod 17 is provided with a card slot 18 along the length direction, the card 15 includes a card edge, the card edge is carded with the control rod 17 through the card slot 18, and the card 15 is used to abut against the opening 9 to limit the control rod 17 from moving toward the negative pressure cylinder 7.

[0034] When in use, the position of the plug body 16 in the pressure control chamber 8 is adjusted by pulling the control rod 17. After the adjustment is completed, the card 15 is engaged with the card slot 18 and the card 15 is made to contact the end of the negative pressure cylinder 7 to prevent the piston 10 from returning, thereby ensuring continuous negative pressure suction in the accommodating chamber 2.

[0035] Preferably, the card 15 is semicircular.

[0036] The semicircular card 15 is convenient for disassembly and can ensure stability after contacting the end of the negative pressure tube 7 to prevent the card 15 from falling off.

[0037] Preferably, both the suction tube 1 and the negative pressure tube 7 are provided with scales 19, and the setting of the scales 19 can further facilitate medical staff to observe the suction status.

[0038] Preferably, a deformation layer 20 is provided at the suction port 3 .

[0039] The deformable layer 20 can adapt to the curve of the human body surface and facilitate human body movements to avoid falling off during human body movements.

[0040] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. Simple negative pressure aspirator, characterized by: It comprises a suction cylinder (1), a containing cavity (2) is formed in the suction cylinder (1), and a suction port (3) is formed at one end of the suction cylinder (1); A connecting hose (4), one end of which is in communication with the accommodating chamber (2), and the other end of which forms a connecting end (5), a plurality of sealing blocks (6) being arranged in the inner circumference of the connecting end (5), the plurality of sealing blocks (6) being used to abut against each other to seal the connecting end (5); A negative pressure cylinder (7) is provided with a pressure control chamber (8) in the negative pressure cylinder (7). An opening (9) is formed at one end of the negative pressure cylinder (7). A piston (10) is provided in the pressure control chamber (8) for sealing and sliding movement. A plug-in end (11) is formed at the front end of the negative pressure cylinder (7). The plug-in end (11) is used for plugging into a connecting end (5) and separating a plurality of sealing blocks (6) from each other, so that the pressure control chamber (8) and the accommodating chamber (2) are connected to each other.

2. The simple negative pressure aspirator according to claim 1, characterized in that: The plug-in end (11) is provided with a receiving groove (12) corresponding to the sealing block (6); when the plug-in end (11) is plugged into the connecting end (5), the sealing block (6) is received in the receiving groove (12).

3. The simple negative pressure aspirator according to claim 1, characterized in that: The connecting end (5) is provided with a sealing ring (13), and the plug-in end (11) is provided with a ring groove (14) corresponding to the sealing ring (13); when the plug-in end (11) is plugged into the connecting end (5), the sealing ring (13) is engaged with the ring groove (14).

4. The simple negative pressure aspirator according to claim 1, characterized in that: It also includes a card (15), the piston (10) includes a plug body (16) and a control rod (17), the control rod (17) is provided with a card slot (18) along the length direction, the card (15) includes a card edge, the card edge is carded with the control rod (17) through the card slot (18), and the card (15) is used to abut against the opening (9) to limit the control rod (17) from moving in the direction of the negative pressure cylinder (7).

5. The simple negative pressure aspirator according to claim 4, characterized in that: The card (15) is semicircular.

6. The simple negative pressure aspirator according to claim 1, characterized in that: The suction cylinder (1) and the negative pressure cylinder (7) are both provided with scales (19).

7. The simple negative pressure aspirator according to claim 1, characterized in that: A deformation layer (20) is provided at the suction port (3).

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