CN219517325U - A negative pressure suction device - Google Patents

Abstract

The utility model discloses a negative pressure suction device which comprises a negative pressure container with an inlet pipe and an outlet pipe, a negative pressure suction device connected with the outlet pipe to be communicated with the negative pressure container, and a constraint part with adjustable length, wherein the two ends of the constraint part are respectively provided with a connecting structure which is detachably connected with the negative pressure container, and the negative pressure container is wound on the body of a patient by adjusting the length of the constraint part. Hang negative pressure aspirator in patient's neck department through hanging the rope realization, liberate patient's both hands, connect constraint portion on negative pressure container through connection structure simultaneously for negative pressure container can be hung or twine on arbitrary positions such as patient's neck, waist abdomen, shank, thereby need not the patient and hold manually, when guaranteeing that patient can use negative pressure equipment in order to guarantee that negative pressure equipment can normal use in real time, liberate patient's both hands, lighten patient's pressure.

Description

A negative pressure suction device

technical field

The utility model relates to a negative pressure suction device.

Background technique

Negative pressure suction devices are often used in wards, mainly for medical drainage, sputum discharge, sewage blood discharge and secretion discharge. The negative pressure suction device uses the principle of vacuum to generate negative pressure in the cavity, so as to guide the liquid in the cavity to achieve the purpose of sewage purification. Patients with endotracheal intubation often need to use negative pressure suction devices to assist breathing. When patients with endotracheal intubation need to go out for examination or need to be transferred in the hospital, in order to avoid breathing difficulties caused by tracheal blockage during the transfer process, therefore, , a negative pressure suction device that can be carried around is particularly important. Some existing negative pressure suction devices are small and compact for easy portability, but they need to be held manually by the patient when they are used outside or during transfers. In this way, the patient's hands are occupied and cannot hold other items , more troublesome, bring inconvenience to the patient.

Utility model content

Aiming at the shortcomings of the above-mentioned prior art, the technical problem to be solved by the utility model is: to provide a negative pressure suction device to solve the problem of inconvenient use during the transfer process.

In order to solve the above technical problems, a technical solution adopted by the utility model is: provide a negative pressure suction device and include a negative pressure container with an inlet pipe and an outlet pipe, and a negative pressure container connected to the outlet pipe to communicate with the negative pressure container. Aspirator, the negative pressure aspirator can make negative pressure in the negative pressure container, and the said negative pressure aspirator is provided with hanging rope so that the negative pressure aspirator is hung on the patient's neck or other places that can be hung, so as not to require the patient to Manual holding; the negative pressure suction device of the present invention also includes a length-adjustable binding part, and a connection structure detachably connected with the negative pressure container is arranged on both ends of the binding part, and the length of the binding part can be adjusted To wrap the negative pressure container around the patient's body, whether it is necessary to wrap the negative pressure container around the patient's waist, legs or neck, it can be realized by adjusting the length of the binding part, which not only frees the patient's hands, but also can There are many ways to choose and it is easy to use.

The negative pressure container is made of medical-grade plastic, which is mostly disposable, and the negative-pressure container is used to store all kinds of dirt sucked out of the patient's body. It is suitable for patients who need to use a negative-pressure suction device In other words, not only the cost is low, but also the new negative pressure container can be replaced in time.

The negative pressure suction device includes a hollow shell inside, a servo motor installed in the shell, and a fan blade set on the output shaft of the servo motor. The shell is respectively provided with an input pipe communicating with the inner and outer chambers of the shell and The output pipe, the input pipe is connected with the outlet pipe. When the servo motor is running, the fan blades rotate with it to drive the wind to flow, so that the gas in the negative pressure container is sucked through the input pipe and discharged from the output pipe, so that Negative pressure is formed in the negative pressure container.

The end of the input pipe far away from the housing is formed with a frustum-shaped inserting head made of elastic material. The inserting head is gradually narrowed from the end close to the shell to the end far away from the shell. The inserting head The diameter of the end close to the housing is larger than the diameter of the input pipe, and a narrowing gap is formed between the end of the insertion head close to the housing and the outer wall of the input pipe; The end of the tube away from the negative pressure container is provided with a connecting tube that communicates with the outlet tube and fits with the insertion head, so as to realize the detachable connection between the negative pressure suction device and the negative pressure container, so as to facilitate the replacement of a new negative pressure container ; and the use of the contraction gap can ensure that the inserting head can be inserted tightly in the connecting pipe.

The outer wall of the housing is provided with a storage box for accommodating the binding part to provide a storage space for the binding part. When the patient does not need to go out or transfer to another hospital, the negative pressure container only needs to be placed somewhere. Remove the binding part and store it in the storage box.

The storage box is screwed on the housing in a simple and easy-to-operate way, and the connection is stable.

The binding part includes a binding belt and a retracting structure arranged on the binding belt for adjusting the length of the binding belt. The two connecting structures are respectively arranged on both ends of the binding belt, and the retracting structure is used to control the length of the binding belt. , so that the patient can adjust the length of the restraint belt, and hang the negative pressure container on the desired hanging position on the body, so that the use of the negative pressure container is more flexible.

The binding belt includes a first binding section connected to the outer wall of the retracting structure at one end and a second binding section retracted at the retracting structure at one end, and the two connecting structures are respectively arranged on the first binding section and the second binding section away from the retracting structure On one end of the structure, the retractable structure only needs to control the length of the entire restraint belt by retracting the second restraint section. From the perspective of technical realization, this embodiment is easier to realize and operate.

Two connecting ears with perforations are arranged on the negative pressure container, and the connecting structure includes two clamping plates with one end hinged and the other end capable of swinging to each other, one of the clamping plates faces one of the other clamping plates. Ribs made of elastic material that are bent along the swing direction of the clamping plate are provided on the side, and a number of sawtooths inclined toward the side of the clamping plate are provided on the inner side of the rib, and on the other clamping plate There is a through hole for the rib to move through, and a ratchet for engaging with the sawtooth is provided in the through hole. When the two clamping plates swing toward each other until they touch each other, the rib passes through the through hole, and the sawtooth engages with the ratchet. Teeth, so that the two clamping plates are limited at the connection ears, and the connection between the restraint belt and the negative pressure container is realized.

The opposite sides of the two clamping plates are provided with meshing teeth that engage with each other to increase the firmness of the connection between the clamping plates and the connecting ears, so that the two clamping plates can clamp the connecting ears.

The negative pressure suction device of the present utility model has at least the following beneficial effects: the negative pressure suction device is suspended on the neck of the patient through the suspension rope, freeing the patient's hands, and at the same time, the binding part is connected to the negative pressure container through the connecting structure, so that The negative pressure container can be hung or wrapped on any part of the patient's neck, waist, abdomen, legs, etc., so that the patient does not need to hold it manually. While ensuring that the patient can use the negative pressure equipment in real time to ensure that the negative pressure equipment can be used normally, Free the patient's hands, and the patient can take other important items or go through the transfer procedures when going out or transferring, reducing the pressure on the patient.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:

The structural representation of the negative pressure suction device of Fig. 1 the utility model;

Fig. 2 is the sectional view of input pipe of the present utility model;

Fig. 3 is a schematic diagram of the connection structure of the present invention.

The meanings of each label in the accompanying drawings are:

Negative pressure container-1; inlet pipe-11; outlet pipe-12; sleeve pipe-13; connecting pipe-14; connecting ear-15; perforation-16; 22; fan blade-23; storage box-24; input tube-25; inserting head-251; shrinkage gap-252; output tube-26; binding part-3; Structure-4; Clamping plate-41; Rib-42; Serration-421; Ratchet-43;

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

With reference to Fig. 1 to Fig. 3, the negative pressure suction device of the present utility model comprises the negative pressure container 1 that has inlet pipe 11 and outlet pipe 12, is connected with outlet pipe 12 to communicate with the negative pressure suction device 2 of negative pressure container 1 and length can Adjustable binding part 3 and the connection structure 4 that is arranged on the two ends of the binding part 3 to be detachably connected with the negative pressure container 1, the negative pressure suction device 2 is provided with a suspension rope 5, and the suspension rope 5 makes the negative pressure suction device 2 It can be hung on the patient's neck, and the negative pressure container 1 connected with the negative pressure suction device 2 is suspended under the traction of the negative pressure suction device 2, so that the patient can free his hands, and the negative pressure container 1 is in the After a certain amount of dirt in the body of the device, its weight will increase accordingly, and it is difficult to support its weight only by the connection with the negative pressure suction device 2, but the setting of the binding part 3 can solve this problem, by adjusting the binding part The length of 3 enables the negative pressure container 1 to be suspended on the patient's body in addition, so as to sufficiently support the negative pressure container 1 after aggravation.

The negative pressure container 1 can be a negative pressure bottle or a negative pressure bag. In this embodiment, the negative pressure container 1 is a negative pressure bag. The top of the negative pressure container 1 has an inlet pipe 11 and an outlet pipe 12 respectively, and one end of the inlet pipe 11 and the outlet pipe 12 are connected to the inner cavity of the negative pressure container 1, and the other end of the inlet pipe 11 is provided with a sleeve for connecting an external pipe. The other end of the pipe 13 is provided with a connecting pipe 14 connected with the negative pressure suction device 2 on the other end of the outlet pipe 12 . Preferably, the negative pressure container 1 is made of medical-grade plastic, and the outlet pipe 12, inlet pipe 11 and connecting pipe 14 of the corresponding negative-pressure container 1 are all made of medical-grade plastic, including materials such as polyethylene and polyvinyl chloride, Both are disposable materials commonly used in medical use, not only have ductility, but also environmental protection, low cost, while the negative pressure container 1 needs to be used for a long time, when the negative pressure container 1 is full and needs to be replaced, the disposable material is expensive. Low and easy to replace, and if other materials that can be used many times are used, although the cost is saved to a certain extent, the negative pressure container 1 after use is faced with cleaning and disinfection problems, as well as cleanliness and disinfection after disinfection. Whether the degree is qualified or not, it is extremely inconvenient to use and the cost of cleaning is high, but this embodiment can avoid this problem.

The negative pressure suction device 2 includes a hollow housing 21, a servo motor 22 disposed in the housing 21, a fan blade 23 disposed on the output shaft of the servo motor 22, and a binding part disposed on the outer wall of the housing 21. 3 storage box 24, the housing 21 is respectively provided with an input tube 25 and an output tube 2612 connecting the inner cavity and the outer cavity of the housing 21, the input tube 25 is connected with the outlet tube 12, and the servo motor 22 operates To drive the fan blade 23 to rotate, the rotated fan blade 23 drives the air flow and sucks the gas from the input pipe 25, and discharges the gas from the output pipe 2612, so that negative pressure is gradually generated in the negative pressure container 1 connected with the input pipe 25. pressure, and the high speed of the servo motor 22 makes the fan blade 23 rotate at a high speed. Compared with the existing negative pressure generated by pressing, the negative pressure of this embodiment can fully meet the use requirements and avoid the situation of insufficient negative pressure. , the storage box 24 is used to store the binding part 3. When the patient does not need to go out or transfer to another hospital, it is no longer necessary to hang the negative pressure container 1. At this time, the binding part 3 on the negative pressure container 1 can be removed and stored in the storage In the box 24, the existence of the binding part 3 is avoided to cause hooking, and the possibility of easy loss due to the binding part 3 being misplaced can be avoided after the binding part 3 is removed.

Referring to Fig. 1, the housing 21 is geometrically shaped. In this embodiment, the housing 21 is cylindrical and has a hollow cavity inside. Preferably, the top of the housing 21 is open and has a top opening for closing the housing 21. The top cover at the mouth, the servo motor 22 is installed on the bottom wall of the cavity of the housing 21 and the output shaft is vertically upwardly arranged, and the servo motor 22 can also be arranged on the top cover without affecting the effect of the utility model. The setting of the top cover can facilitate the replacement and maintenance of the negative pressure suction device 2 . The fan blades 23 are equidistantly distributed around the circumference of the output shaft of the servo motor 22. The input pipe 25 is arranged at the bottom of the housing 21 and communicates with the inner cavity of the housing 21. The output pipe 2612 is arranged at the top of the housing 21 and inside the housing 21. cavity, a power supply is arranged in the housing 21, and the power supply is electrically connected to the servo motor 22, and a switch electrically connected to the power supply is provided on the outer wall of the housing 21 so as to turn on and off the power supply. When the power is turned on, the servo motor 22 runs and drives the fan blade 23 to rotate. After the fan blade 23 rotates, the airflow moves from bottom to top under the drive of the fan blade 23, so that the negative pressure container is discharged through the outlet pipe 12 connected to the input pipe 25. The gas in 1 is pumped outward into the casing 21 and discharged out of the casing 21 through the output pipe 2612 , so that negative pressure is gradually generated in the negative pressure container 1 .

The top of the storage box 24 is open, and the inner wall of the opening of the storage box 24 is formed with internal threads, and the bottom of the housing 21 is provided with a connecting pipe 14, and the outer wall of the connecting pipe 14 is provided with an outer thread that fits with the internal thread. The screw threads enable the storage box 24 to be screwed on the casing 21 .

Preferably, the length of the input tube 25 is greater than one meter, so that the patient has sufficient length when wrapping the negative pressure container 1 around the patient's leg. The end of the input pipe 25 away from the housing 21 is formed with a frustum-shaped insertion head 251 made of elastic material. The insertion head 251 is gradually narrowed from the end close to the housing 21 to the end far away from the housing 21. In this embodiment In an example, the insertion head 251 is vertically arranged, and the end of the insertion head 251 close to the housing 21 is the top end of the insertion head 251, and the end of the insertion head 251 away from the housing 21 is the bottom end of the insertion head 251, and the insertion head 251 is the bottom end of the insertion head 251. The head 251 gradually narrows from the width to be in the shape of a cone with a wide top and a narrow bottom. The diameter of the end of the inserting head 251 close to the housing 21 is greater than the diameter of the input pipe 25, and between the end of the inserting head 251 close to the housing 21 and the outer wall of the input pipe 25, there is an incline towards the end away from the housing 21. The shrinkage gap 252 arranged narrowly makes the insertion head 251 have a shrinkage space, and the insertion head 251 is inserted into the connecting pipe 14 to realize the detachable connection between the negative pressure suction device 2 and the negative pressure container 1, and the insertion connection The way of operation is quite simple and easy to use.

Specifically, the inner chamber of the connecting pipe 14 is formed with a cylindrical insertion cavity that communicates with the inner and outer cavity of the outlet pipe 12, and the diameter of the top of the insertion head 251 is smaller than the diameter of the insertion cavity, and the diameter of the top of the insertion head 251 is larger than that of the insertion cavity. The diameter of the insertion cavity, and the outer wall of the contraction gap 252 is in the shape of a conical cone with a wide top and a narrow bottom, and the diameter at the middle of the contraction gap 252 is equal to the diameter of the insertion cavity. When the insertion head 251 is inserted in the insertion cavity, the bottom end of the insertion head 251 can easily enter the insertion cavity, and because the shape of the insertion head 251 and the diameter of the insertion head 251 top are greater than the diameter of the insertion head 251 The diameter of the cavity is that when the insertion head 251 is inserted in the insertion cavity until the insertion head 251 moves to the position of the contraction gap 252, the outer wall of the insertion head 251 is attached to the inner wall of the insertion cavity, and due to The existence of the contraction gap 252 and the insertion head 251 made of elastic material provide a contraction space for the insertion head 251, so that even if the insertion head 251 is attached to the inner wall of the insertion cavity, it can be squeezed under the action of an external force. Press the insertion head 251 to continue moving towards the insertion cavity. During the movement, the insertion head 251 shrinks toward the shrinkage gap 252 under the extrusion of the inner wall of the insertion cavity to reduce the volume of the insertion head 251 until the insertion The mounting head 251 is clamped tightly in the mounting cavity. This embodiment is not only simple in structure and easy to operate, but the mounting head 251 and the connecting pipe 14 are all made of elastic materials. Therefore, the gap between the mounting head 251 and the connecting pipe 14 The friction is relatively large during contact, which can further improve the connection firmness of the insertion head 251 and the connecting pipe 14 when they are connected and mated. 251 can be pulled out of the insertion groove, and the effect of external force will make the insertion head 251 clamped in the insertion cavity disengage from the connecting pipe 14 .

The binding part 3 includes a binding belt 31 for connecting the negative pressure container 1 to other articles or the human body and a retracting structure 32 arranged on the binding belt 31 for adjusting the length of the binding belt 31. The two connecting structures 4 are respectively arranged on On both ends of the restraint belt 31, the length of the restraint belt 31 is adjusted by the retracting structure 32, so that the restraint belt 31 can be adjusted arbitrarily according to the usage situation, and the use range is wide and the use is more flexible.

The restraint belt 31 includes a first restraint segment connected to the outer wall of the retractable structure 32 at one end and a second restraint segment retracted at the retractable structure 32 at one end. One end of the retractable structure 32 is connected to the negative pressure container 1 . Specifically, both the first binding section and the second binding section are made of glass fiber and PVC plastic, which are not only flexible and elastic, but also capable of being rolled up and bound, and the structure of the rolled-up structure 32 is the same as that of the prior art. The structure of the tape measure is consistent, and the structure of the prior art can be directly referred to, such as the structure of the Chinese patent with the application number CN201911356044.7, which will not be repeated here. It should be noted that the structure of the binding part 3 is not limited to this embodiment, and other structures can also be used for replacement, such as the binding part 3 includes a binding belt 31 and a retracting structure 32, the binding belt 31 includes a third binding section, the first One end of the three binding sections is retracted in the retracting structure 32, the other end of the third binding section is connected to one of the connecting structures 4, and the other connecting structure 4 is connected to the retracting structure 32, which can also achieve the same function. However, Compared with the structure of the previous embodiment, after the binding belt 31 is set in one section, the weight of the retracting structure 32 is mainly concentrated on the place where the negative pressure container 1 and the retracting structure 32 are connected, and it is easy to cause the connecting structure 4 to turn over and stir, and if things go on like this , it is easy to cause damage to the connecting structure 4, and the retractable structure 32 is arranged in the middle of the restraint belt 31, so that the weight of the retractable structure 32 is mainly dragged by the restraint belt 31, while the restraint belt 31 is soft and tough, and relatively speaking, it has a higher bearing capacity. good. It is also possible to replace the retractable structure 32 with Velcro, connect the Velcro to the strap 31, and adjust the length of the strap 31 by folding the strap 31 in half.

The connection structure 4 includes two clamping plates 41 with one end hinged and the other end swinging mutually and a rib 42 arranged on one of the clamping plates 41. The two clamping plates 41 can swing toward or back, when the two clamping plates 41 are pulled towards When the two clamping plates 41 swing back to each other, the two clamping plates 41 can be opened to each other, and the ribs 42 are located on the corresponding clamping plate 41 and face the other clamping plate 41. The side surface of the clamping plate 41 is bent along the swing direction of the clamping plate 41, and the rib 42 is made of elastic material and can be deformed under the action of an external force, and the rib 42 has a self-recovery shape, which will occur when the external force squeezes the rib 42. deformation, when the external force is withdrawn, the rib 42 quickly returns to its original shape. On the inside surface of the rib 42, a number of sawtooths 421 inclined toward the side of the clamping plate 41 are provided. On the other clamping plate 41, a through hole 44 for the rib 42 to move through is formed. There is a ratchet 43 for engaging with the sawtooth 421. When the two clamping plates 41 swing toward each other until they touch each other, the rib 42 passes through the through hole 44, and the sawtooth 421 engages with the ratchet 43 to limit the two clamping plates 41 to continue to swing .

Specifically, two connecting ears 15 respectively corresponding to the two connecting structures 4 are provided on the negative pressure container 1. The two connecting ears 15 are respectively arranged on opposite sides of the negative pressure container 1 and each has a perforation 16 through which the rib 42 penetrates. Insert the through hole 16 and make the two clamping plates 41 clamped on the connecting ear 15 to complete the connection between the connecting structure 4 and the negative pressure container 1 . Two clamping plates 41 are all in the shape of a cuboid and have a long side, a wide side and a side in the thickness direction. One of the wide sides of the two clamping plates 41 is hinged by a hinge seat, or is arranged on the wide sides of the two clamping plates 41. The connecting shafts are provided with perforations 16 along the direction parallel to the wide sides, and a rotating shaft is passed through the through holes 16 of each connecting shaft to realize the hinge between the two clamping plates 41 . A torsion spring is arranged on the rotating shaft, and the two torsion arms of the torsion spring are respectively connected to the two clamping plates 41 . As preferably, on the opposite sides of the two clamping plates 41 are provided with meshing teeth 45 that are engaged with each other. The meshing teeth 45 on the 41 are meshed and matched so that the connecting ears 15 can be bitten more tightly so that the two clamping plates 41 will not easily break away from the connecting ears 15 after being clamped on the connecting ears 15 to increase the firmness of the connection. On the other end of the rib 42 located at the clamping plate 41 away from the hinged end, the inner surface of the rib 42 is a side of the rib 42 facing the hinged end of the clamping plate 41, and the length of the rib 42 is greater than the thickness of the clamping plate 41 to be able to Through the through hole 44. Because the connecting ear 15 has a certain thickness, and the thickness of the connecting ear 15 of different materials is not consistent, therefore, the several sawtooth 421 of the rib 42 can be used, and the two clamping plates 41 will not be tightly attached due to the thickness of the connecting ear 15. Together, the ratchet 43 will engage with the sawtooth 421 moved to the position of the ratchet 43, so that it can be used to clamp the connecting ears 15 of different thicknesses. The through hole 44 is opened along the swing direction of the clamping plate 41 , so that when the rib 42 swings along the arc along the clamping plate 41 , the rib 42 can smoothly penetrate into the through hole 44 and pass out of the through hole 44 . The ratchet 43 is arranged on the side of the through hole 44 near the hinged end of the clamping plate 41, and the shape of the ratchet 43 is consistent with the shape of the groove between the adjacent serrations 421. When the rib 42 moves toward the ratchet 43, the ratchet will Tooth 43 squeezes sawtooth 421 so that whole rib 42 is deformed toward the side away from ratchet 43 to pass ratchet 43, when finishing clamping and stopping swing clamping plate 41, ratchet 43 engages on the passing sawtooth 421, toward The sawtooth 421 inclined in the direction of the rib 42 cannot be retracted away from the through hole 44 under the restriction of the ratchet 43 , so that the rib 42 is clamped in the through hole 44 to realize the limit between the two clamping plates 41 . When it is necessary to disengage the rib 42 from the through hole 44 , the rib 42 is pulled away from the ratchet 43 until the ratchet 43 disengages from the serration 421 to swing the clamping plate 41 . It should be understood that the width of the through hole 44 is greater than the length of the ratchet 43 and the rib 42 along the width direction of the through hole 44 so that when the rib 42 is pulled away from the ratchet 43, the serration 421 of the rib 42 can completely disengage from the ratchet. 43.

One of the embodiments of the negative pressure suction device of the present utility model works as follows: when the patient needs to go out for inspection or transfer, and needs to use the negative pressure suction device, first insert the insertion head 251 into the insertion cavity to make the negative pressure The aspirator 2 is connected with the negative pressure container 1, and the suspension rope 5 is hung on the neck of the patient. After the storage box 24 is rotated to take off the storage box 24, the bound part 3 in the storage box 24 is taken out. At this time, each The two clamping plates 41 of the connection structure 4 are not fastened, and the two clamping plates 41 are opened under the action of the torsion spring. Align the connecting ear 15 and make the rib 42 align with the perforation 16, then press the two clamping plates 41 toward each other so that the two clamping plates 41 move toward each other until the rib 42 passes through the perforation 16 and penetrates into the through hole 44, when the two clamping plates When the holding plate 41 clamps the connecting ear 15 and cannot move toward each other, the ratchet 43 engages with the corresponding serration 421 and the rib 42 is clamped in the through hole 44, thereby restricting the two clamping plates 41 from continuing to swing To complete the connection between the restraint belt 31 and the negative pressure container 1, adjust the length through the retracting structure 32 so that the restraint belt 31 is placed on the patient's waist, and start the servo motor 22 to gradually generate negative pressure in the negative pressure container 1.

Compared with the prior art, the negative pressure suction device of the present utility model can be suspended on the patient's body to avoid the patient's manual holding, and the binding part 3 whose length can be adjusted can be that the negative pressure container 1 is only suspended on the patient's body and is difficult to fall off. It is easy to carry and use the negative pressure suction device.

Claims (10)

1. a kind of negative pressure suction device is characterized in that: comprise the negative pressure container that has inlet pipe and outlet pipe and be connected with the negative pressure suction device that is connected with negative pressure container with described outlet pipe, set on the negative pressure suction device There is a suspension rope, and also includes a binding part with adjustable length, and a connection structure detachably connected with the negative pressure container is provided on both ends of the binding part, and the negative pressure container can be wound around the patient by adjusting the length of the binding part physically. 2. The negative pressure suction device according to claim 1, wherein the negative pressure container is made of medical grade plastic. 3. The negative pressure suction device according to claim 2, characterized in that: the negative pressure suction device comprises a hollow housing, a servo motor arranged in the housing and a fan blade arranged on the output shaft of the servo motor, An input pipe and an output pipe communicating with the inner and outer chambers of the housing are respectively arranged on the housing, and the input pipe is connected with the outlet pipe. 4. The negative pressure suction device according to claim 3, characterized in that: the end of the input tube away from the housing is formed with a frustum-shaped inserting head made of elastic material, and the inserting head is made of The end close to the housing is tapered to the end away from the housing, the diameter of the end of the insertion head close to the housing is larger than the diameter of the input pipe, and the end of the insertion head near the housing is between the outer wall of the input pipe A narrowing gap is formed towards the end far away from the housing; the end of the outlet pipe far away from the negative pressure container is provided with a connecting pipe that communicates with the outlet pipe and fits with the insertion head. 5 . The negative pressure suction device according to claim 4 , characterized in that: a storage box for accommodating the binding portion is provided on the outer wall of the casing. 5 . 6. The negative pressure suction device according to claim 5, wherein the storage box is screwed to the housing. 7. The negative pressure suction device according to claim 1 or 6, characterized in that: the binding part comprises a binding belt and a retracting structure arranged on the binding belt for adjusting the length of the binding belt, and the two connecting structures They are respectively arranged on the two ends of the restraint belt. 8. The negative pressure suction device according to claim 7, characterized in that: the binding belt includes a first binding section whose one end is connected to the outer wall of the retracting structure and a second binding section whose end is retracted in the retracting structure, The two connecting structures are respectively arranged on the ends of the first binding section and the second binding section away from the retracting structure. 9. The negative pressure suction device according to claim 8, characterized in that: the negative pressure container is provided with two perforated connection ears, and the connection structure includes two clamps with one end hinged and the other end capable of swinging each other. Plates, one side of the clamping plate facing the other clamping plate is provided with a rib made of elastic material bent along the swing direction of the clamping plate, and the inner side of the rib is provided with a There are several sawtooths inclined on one side of the clamping plate, and a through hole for the rib to pass through is formed on the other clamping plate, and a ratchet for engaging with the sawtooth is arranged in the through hole, when the two clamping plates face each other When swinging until touching, the rib passes through the through hole, and the saw teeth engage with the ratchet. 10. The negative pressure suction device according to claim 9, characterized in that: the opposite sides of the two clamping plates are provided with meshing teeth that mesh with each other.