Multi-cavity mechanical flow dividing device for preventing thrombus after lower limb operation

Abstract

The utility model discloses a multi-cavity mechanical flow dividing device for thrombus prevention after a lower limb operation, and belongs to the technical field of thrombus prevention after the lower limb operation. The device comprises a cover body part, a mechanical gas distribution mechanism and a power device. The mechanical gas distribution mechanism is located at the bottom end of the cover body part, the power device is installed below the mechanical gas distribution mechanism, and the power device, the mechanical gas distribution mechanism and the cover body part are tightly connected through the elastic sealing connecting part. And the power device drives the cover body part to rotate, so that the gas inlet of the mechanical gas distribution mechanism is connected with an external gas source, and gas distribution and output are realized. The human body air bags are sequentially inflated with air, circulating pressure is formed from the telecentric end to the proximal end, backflow of venous blood and lymph is promoted, and deep venous thrombosis is prevented. By optimizing the mechanical structure, simplifying the sealing design and increasing the gas flow, the inflation efficiency and the sealing performance are remarkably improved, meanwhile, the production cost is reduced, and the device is suitable for being used in medical institutions and families.

Description

Technical Field

[0001] This utility model relates to the field of postoperative thrombosis prevention technology for lower limbs, specifically to a multi-chamber mechanical shunt device for postoperative thrombosis prevention of lower limbs. Background Technology

[0002] Prevention of deep vein thrombosis (DVT) after lower extremity surgery is an important task in the medical field. Air wave pressure therapy, as a medical device, uses a cyclical inflation and deflation of an air bladder by setting the inflation pressure, inflation sequence, and inflation time. This creates circulatory pressure on the limb from distal to proximal, thereby promoting venous blood and lymph return, accelerating blood flow, reducing blood stasis, and ultimately preventing the formation of deep vein thrombosis.

[0003] Currently, most widely used postoperative antithrombotic devices on the market use solenoid valves to control gas flow. This technology has the following main problems:

[0004] 1. Limited gas flow and low inflation efficiency: The solenoid valve typically has a diameter of φ2mm and a cross-sectional area of ​​only 3.14mm². 2 The limited gas flow rate results in a slow inflation rate. In the treatment of deep vein thrombosis, rapid inflation can improve treatment efficiency by 50% compared to slow inflation; therefore, the performance of existing equipment is insufficient for the demands of rapid treatment.

[0005] 2. Complex structure and high manufacturing cost: Solenoid valve components are usually made of metal, and the internal voltage regulating power supply and complex control software design result in high overall manufacturing costs, which limits the popularization of the device in home medical scenarios.

[0006] In the prior art, for example, the gas diversion device of an air wave pressure therapy device disclosed in CN218510233U, although it adopts a design of synchronous motor driving the middle cover to rotate, thereby improving the gas flow rate and inflation speed, still has shortcomings in installation and use, especially in terms of gas flow optimization and sealing structure:

[0007] Existing devices attempt to increase gas flow rate through a diversion sealing rotary mechanism and a lubrication sealing unit. However, their effectiveness is limited by the following factors: Existing devices use a multi-layered structure (upper cover, middle cover, lower cover) for gas diversion and sealing, with each layer involving airflow guidance and distribution. This complex path design increases gas flow resistance, making it difficult to achieve rapid and efficient gas inflation. Furthermore, the synchronous motor's drive pin needs to engage with the limiting sealing slot in the middle cover, requiring precise alignment of components. Even slight misalignment in component installation can restrict gas flow, further affecting gas flow rate and inflation speed.

[0008] Furthermore, in terms of sealing, existing technologies employ multiple sealing components to achieve gas diversion and sealing effects. However, these complex designs can easily lead to sealing failure. During installation, multiple components, such as the diversion sealing rotation mechanism, gaskets, sealing limit springs, and lubrication sealing units, require precise alignment. The synchronous motor's drive pin must be precisely engaged in the limiting sealing groove of the middle cover, while the limiting connection of the upper cover must be aligned with the limiting protrusion of the lower cover before being threaded in place. This high-precision installation process is prone to misalignment or loosening, resulting in a decrease in the overall sealing performance of the equipment. Therefore, due to the complex linkage between these components, even slight deviations can lead to poor sealing and air leakage. The sealing limit spring uses its elasticity to press against the middle cover, sealing the gap between the middle cover and the upper cover. However, under prolonged operation or frequent use, the spring's elasticity may weaken due to fatigue, leading to an increase in the gap between the sealing surfaces and a decrease in sealing performance. Furthermore, although the lubricant reservoir and lubrication layer of the lubrication sealing unit are designed to reduce friction and increase gas flow rate, they can only optimize the motion state of rotating parts and cannot fundamentally solve the problem of the small gas flow cross-sectional area, resulting in limited flow rate improvement. This leads to long operating times and difficult maintenance. Utility Model Content

[0009] The problem this invention aims to solve is that gas flow is easily limited and the sealing structure is complex, which can easily lead to a decrease in sealing effect. The invention provides a multi-chamber mechanical shunt device for preventing thrombosis after lower limb surgery, which simplifies the structure, increases gas flow, and optimizes sealing performance.

[0010] To address the aforementioned problems, this utility model provides a mechanical shunt device for preventing thrombosis after lower limb surgery with multiple chambers. The device includes a cover component, a mechanical gas distribution mechanism at its bottom, and a power unit at its lower end. The power unit is characterized by an elastic sealing connection component connected to it. This elastic sealing connection component passes sequentially through the mechanical gas distribution mechanism and the cover component, thus tightly connecting the power unit to both the mechanical gas distribution mechanism and the cover component. The power unit drives the cover component to rotate. The air inlet of the mechanical gas distribution mechanism is connected to an external gas source, and the gas exits through the cover component, sequentially inflating the airbag acting on the human body from the distal to the proximal end.

[0011] Preferably, the cover component includes a limiting cover body, the upper center of which is provided with a through annular relief hole, the end of which is provided with a strip-shaped relief groove extending to both ends, and the side end of the strip-shaped relief groove is provided with a vent hole.

[0012] Preferably, the lower inner edge of the limiting card cover is provided with an air inlet guide groove, and the side end of the air inlet guide groove is provided with an air venting cavity corresponding to the air venting hole.

[0013] Preferably, the mechanical gas distribution mechanism includes an air inlet distribution seat, with a through connecting cavity groove at the center of the air inlet distribution seat, and multiple air inlet pipe interfaces extending from the side of the air inlet distribution seat. The air inlet pipe interfaces communicate with the air chambers opened on the air inlet distribution seat, and the air chambers communicate with the air inlet guide grooves.

[0014] Preferably, the power unit includes a synchronous motor, which is disposed within the power unit base.

[0015] Preferably, the elastic sealing connection component includes a transmission rod with a tower spring sleeved on it. One end of the transmission rod is connected to a synchronous motor via a coupling. The end of the transmission rod away from the synchronous motor extends upward and passes through the connecting cavity groove and the annular clearance hole in sequence. The power unit uses the synchronous motor to drive the limiting cover body, achieving stable and reliable flow distribution operation through mechanical transmission. Compared with solenoid valve control, this reduces the risk of electronic component failure and improves the reliability of the equipment. The limiting rod passes through the connecting hole at the top of the transmission rod and is located in the strip-shaped clearance groove, thereby sealing the contact surface between the cover body component and the mechanical gas distribution mechanism. The limiting rod locks the contact surface between the cover body component and the mechanical gas distribution mechanism through the connecting hole at the top of the transmission rod, further enhancing the sealing performance and effectively avoiding the leakage problems caused by spring fatigue or misalignment of multiple components in the prior art.

[0016] Preferably, both the cover component and the mechanical gas distribution mechanism are injection molded into a single structure from high-molecular plastic material. By using high-molecular plastic material, the anti-thrombotic treatment mode can be achieved without the need for a voltage regulating power supply and control software inside the device, thus reducing the user's operating costs.

[0017] Preferably, the cross-sectional area of ​​the air intake guide groove is 8-12 mm. 2 By optimizing the cross-sectional area of ​​the air intake guide groove to 8-12mm 2 This significantly increases the cross-sectional area for gas flow, resulting in a gas flow rate that is more than double that of existing technologies using solenoid valves. Combined with a mechanical gas distribution mechanism, the gas inflation efficiency is significantly improved. This is especially beneficial in medical settings where rapid inflation is required, as it can effectively shorten treatment time and increase treatment efficiency.

[0018] Compared with the prior art, the present invention achieves the following beneficial technical effects:

[0019] This invention employs an elastic sealing connection component to tightly connect the power unit, mechanical gas distribution mechanism, and cover component, reducing the number and complexity of parts. Compared to the metal solenoid valve assembly, complex control circuitry, or complex multi-layered structure used in existing technologies for gas diversion and sealing, this invention simplifies the device structure and reduces the complexity of production and assembly, significantly lowering the manufacturing cost of the equipment.

[0020] This invention employs an elastic sealing connection component, in which the transmission rod and tower spring provide stable elastic pressure, ensuring long-term stability of the sealing performance and avoiding air leakage problems caused by spring fatigue or misalignment of multiple components in existing technologies. By effectively locking the contact surface between the cap component and the mechanical gas distribution mechanism with the limiting rod, the sealing effect is further enhanced, ensuring smooth gas flow without leakage.

[0021] This invention eliminates the need for complex structures involving multi-layered sealing and lubrication sealing units. Instead, it employs a simple and efficient mechanical gas distribution mechanism, significantly simplifying installation and maintenance. The reduced time required for initial assembly and subsequent maintenance lowers the burden on medical institutions and patients. The mechanical gas distribution mechanism uses multiple inlet ports to distribute gas in multiple pathways, simultaneously inflating multiple air chambers. This meets the pressure gradient requirements for different areas in the prevention of deep vein thrombosis after lower limb surgery, effectively promoting venous blood and lymph return and improving treatment outcomes. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the multi-chamber lower limb postoperative thrombosis prevention mechanical shunt device of this utility model.

[0023] Figure 2 This is an assembly diagram of the mechanical shunt device for preventing thrombosis after surgery in the lower extremities according to this utility model.

[0024] Figure 3 This is a structural schematic diagram of the cover component.

[0025] Figure 4 This is a structural schematic diagram of the cover component from another perspective.

[0026] Figure 5 This is a schematic diagram of a mechanical gas distribution mechanism.

[0027] Figure 6 This is a cross-sectional view of a mechanical gas distribution mechanism.

[0028] Figure 7 This is a side view of a mechanical gas distribution mechanism.

[0029] Figure 8 This is a schematic diagram of the structure of the airbag during lower limb surgery, showing the air intake through the mechanical shunt device.

[0030] In the diagram: 1-Cover body component, 101-Limiting cover body, 102-Annular clearance hole, 103-Strip clearance groove, 104-Vent hole, 105-Inlet guide groove, 106-Vent chamber, 2-Mechanical gas distribution mechanism, 201-Inlet distribution seat, 202-Connecting cavity groove, 203-Inlet pipe interface, 204-Gas chamber, 3-Power unit, 301-Synchronous motor, 302-Power base, 4-Elastic sealing connection component, 401-Transmission rod, 402-Tower spring, 403-Limiting rod, 404-Connecting hole. Detailed Implementation

[0031] The present invention will be further explained below with reference to the accompanying drawings and embodiments.

[0032] Reference Figure 1-2 As shown, a multi-chamber lower limb postoperative thrombosis prevention mechanical shunt device includes a cover component 1 for gas diversion and sealing; a mechanical gas distribution mechanism 2 is provided at the bottom of the cover component 1, which is mainly used for multi-path gas distribution; a power device 3 is provided at the lower end of the mechanical gas distribution mechanism 2. The power device 3 is characterized in that an elastic sealing connection component 4 is connected to the power device 3. The elastic sealing connection component 4 passes through the mechanical gas distribution mechanism 2 and the cover component 1 in sequence, thereby tightly connecting the power device 3 with the mechanical gas distribution mechanism 2 and the cover component 1. The cover component 1 is driven to rotate by the power device 3. The air inlet of the mechanical gas distribution mechanism 2 is connected to an external gas source for air intake. The gas is discharged through the cover component 1, and the airbag acting on the human body is inflated sequentially from the distal end to the proximal end.

[0033] Reference Figure 2 , 3 As shown in Figure 4, the cover component 1 is composed of a limiting cover body 101. A through annular clearance hole 102 is provided at the center of the upper end of the limiting cover body 101, and the end of the annular clearance hole 102 extends to form a strip-shaped clearance groove 103. An air inlet guide groove 105 with a cross-sectional area of ​​8-12 mm² is provided on the inner edge of the lower end of the limiting cover body 101. 2 This greatly increases the gas flow area and improves inflation efficiency. The side end of the strip-shaped recessed groove 103 is provided with a vent hole 104, and the lower inner edge of the limiting cover 101 is provided with an air inlet guide groove 105, forming a stable airflow path.

[0034] Reference Figure 2 , 5As shown in Figures 6, 7, and 8, the mechanical gas distribution mechanism 2 distributes gas through an internal air intake distribution seat 201 and multiple air intake pipe interfaces 203. The mechanical gas distribution mechanism 2 includes an air intake distribution seat 201, with a through connecting cavity 202 at its center. Multiple air intake pipe interfaces 203 extend from the side of the air intake distribution seat 201. These air intake pipe interfaces 203 communicate with an air cavity 204 formed on the air intake distribution seat 201. The air cavity 204 communicates with an air intake guide groove 105. Gas enters the air cavity 204 through the multiple air intake pipe interfaces 203 and then flows into the air intake guide groove 105. Through mechanical gas distribution, multiple chambers are inflated, forming a stable airflow path, thereby transferring gas from an external gas source to multiple airbag chambers.

[0035] Reference Figure 1 , 2 As shown, the power unit 3 includes a synchronous motor 301 and a power base 302. The synchronous motor 301 drives the cover component 1 to rotate, achieving stable mechanical flow diversion. The power unit 3 is driven by a synchronous motor 301, which is installed inside the power base 302. The synchronous motor 301 is connected to the transmission rod 401 through a coupling, driving the limit clamp cover 101 to rotate, thereby causing gas diversion.

[0036] The elastic sealing connection component 4, composed of a transmission rod 401, a tower spring 402, and a limiting rod 403, is used to achieve a tight connection between the power unit 3, the mechanical gas distribution mechanism 2, and the cover component 1, providing long-term stable sealing performance. The elastic sealing connection component 4 ensures a tight connection between the power unit 3, the mechanical gas distribution mechanism 2, and the cover component 1 by passing the transmission rod 401 through the connecting cavity groove 202 and the annular relief hole 102. The tower spring 402 is sleeved on the transmission rod 401, providing elastic pressure to the transmission rod and ensuring long-term stable sealing performance. The limiting rod 403 locks the contact surfaces of the cover component 1 and the mechanical gas distribution mechanism 2 through the connecting hole 404 at the top of the transmission rod 401, further enhancing the sealing performance.

[0037] Both the cover component 1 and the mechanical gas distribution mechanism 2 are injection molded into a single structure using high-polymer plastic material. By using high-polymer plastic material, the device can achieve the anti-thrombosis treatment mode without the need for a voltage regulating power supply and control software, thus reducing the user's operating costs.

[0038] The cross-sectional area of ​​the air intake guide groove 105 is 8-12mm. 2 The cross-sectional area of ​​the intake guide groove 105 is optimized to 8-12mm. 2This significantly increases the cross-sectional area for gas flow, resulting in a gas flow rate that is more than double that of the solenoid valve used in existing technologies. Combined with the mechanical gas distribution mechanism 2, the gas inflation efficiency is significantly improved. Especially in medical scenarios where rapid inflation is required, it can effectively shorten treatment time and improve treatment efficiency.

[0039] To facilitate understanding of the above technical solutions of this utility model, the following detailed description of the above technical solutions of this utility model is provided through specific usage methods.

[0040] The specific working process is as follows: During installation, place the mechanical gas distribution mechanism 2 on the workbench, ensuring that the connecting groove 202 at the center of its air inlet distribution seat 201 faces upwards. Confirm that the positions of the multiple air inlet pipe interfaces 203 are correct to facilitate subsequent connection to the gas source. Fix the synchronous motor 301 of the power unit 3 inside the power base 302 and tighten it with screws to ensure that the motor is secure and not loose. Connect the transmission rod 401 of the elastic sealing connection component 4 to the synchronous motor 301 through a coupling, ensuring that the coupling is tightened and there is no looseness. Pass the other end of the transmission rod 401 through the connecting groove 202 at the center of the mechanical gas distribution mechanism 2. Ensure that the transmission rod 401 rotates freely and does not rub against the inner wall of the connecting groove 202, and then align the limiting cover 101 of the cover component 1 with the upper part of the mechanical gas distribution mechanism 2. Ensure that the annular clearance hole 102 of the cover component 1 is aligned with the top of the transmission rod 401, and pass the transmission rod through the annular clearance hole 102. Next, place the tower spring 402 onto the transmission rod 401, ensuring its correct position. Pass the limiting rod 403 through the connecting hole 404 at the top of the transmission rod, positioning the limiting rod 403 within the strip-shaped clearance groove 103. Then, lock the contact surface between the cover component 1 and the mechanical gas distribution mechanism 2, ensuring the limiting rod 403 is securely installed and the tower spring 402 provides sufficient elastic pressure. After confirming the limiting rod 403 is locked, the contact surface between the cover component 1 and the mechanical gas distribution mechanism 2 is well-sealed without gaps. During use, gas from an external gas source enters through the air inlet port 203 of the mechanical gas distribution mechanism 2. After the power unit 3 is started, the synchronous motor 301 drives the transmission rod 401 to rotate, thereby driving the limiting cover 101 to perform a flow distribution operation. Gas flows sequentially into the target airbag chamber through the air inlet guide groove 105 and the deflation chamber 106, achieving gradual inflation from the distal to the proximal end. After inflation is complete, open the vent 104 and the gas will be discharged through the vent 104, completing a full inflation and deflation cycle.

[0041] In summary, the multi-chamber lower limb postoperative thrombosis prevention mechanical shunt device provided by this utility model has excellent technical effects in terms of structural simplification, sealing optimization, gas flow improvement and reduced use cost, and is suitable for the prevention and treatment of deep vein thrombosis in medical institutions and home settings.

[0042] In the description of this utility model, it should be noted that the terms "upper," "lower," 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 do not 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. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0043] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A mechanical shunt device for preventing thrombosis after surgery in a multi-chamber lower limb, comprising a cover component (1), wherein a mechanical gas distribution mechanism (2) is provided at the bottom end of the cover component (1), and a power device (3) is provided at the lower end of the mechanical gas distribution mechanism (2), characterized in that, The power unit (3) is connected to an elastic sealing connection component (4). The elastic sealing connection component (4) passes through the mechanical gas distribution mechanism (2) and the cover component (1) in sequence, thereby tightly connecting the power unit (3) with the mechanical gas distribution mechanism (2) and the cover component (1). The cover component (1) is driven to rotate by the power unit (3). The air inlet of the mechanical gas distribution mechanism (2) is connected to an external gas source for air intake. The gas is discharged through the cover component (1) and the airbag acting on the human body is inflated sequentially from the distal end to the proximal end.

2. The multi-compartment lower limb postoperative thrombosis prevention mechanical shunt device according to claim 1, characterized in that, The cover component (1) includes a limiting cover body (101), the upper center of the limiting cover body (101) is provided with a through annular relief hole (102), the end of the annular relief hole (102) is provided with a strip-shaped relief groove (103) extending to both ends, and the side end of the strip-shaped relief groove (103) is provided with a vent hole (104).

3. The multi-compartment lower limb postoperative thrombosis prevention mechanical shunt device according to claim 2, characterized in that, The lower inner edge of the limiting card cover (101) is provided with an air inlet guide groove (105), and the side end of the air inlet guide groove (105) is provided with an air venting cavity (106) corresponding to the air venting hole (104).

4. The multi-compartment lower limb postoperative thrombosis prevention mechanical shunt device according to claim 3, characterized in that, The mechanical gas distribution mechanism (2) includes an air inlet distribution seat (201), with a through connecting cavity (202) at the center of the air inlet distribution seat (201). Multiple air inlet pipe interfaces (203) extend from the side of the air inlet distribution seat (201), and the air inlet pipe interfaces (203) communicate with the air chambers (204) opened on the air inlet distribution seat (201). The air chambers (204) communicate with the air inlet guide groove (105).

5. The multi-compartment lower limb postoperative thrombosis prevention mechanical shunt device according to claim 4, characterized in that, The power unit (3) includes a synchronous motor (301), which is disposed in the power unit (302).

6. The multi-compartment lower limb postoperative thrombosis prevention mechanical shunt device according to claim 5, characterized in that, The elastic sealing connection component (4) includes a transmission rod (401), on which a tower spring (402) is sleeved. One end of the transmission rod (401) is connected to a synchronous motor (301) via a coupling. The end of the transmission rod (401) away from the synchronous motor (301) extends upward and passes through the connecting cavity groove (202) and the annular relief hole (102) in sequence. The limiting insert (403) passes through the connecting hole (404) at the top of the transmission rod (401). The limiting insert (403) is located in the strip-shaped relief groove (103), thereby sealing the contact surface between the cover component (1) and the mechanical gas distribution mechanism (2).

7. The multi-compartment lower limb postoperative thrombosis prevention mechanical shunt device according to claim 1, characterized in that, Both the cover component (1) and the mechanical gas distribution mechanism (2) are injection molded from high-molecular plastic material into a single integrated structure.

8. The multi-compartment lower limb postoperative thrombosis prevention mechanical shunt device according to claim 3, characterized in that, The cross-sectional area of ​​the air intake guide groove (105) is 8-12 mm. 2 .

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