Air path conveying system of air pressure therapeutic apparatus

Abstract

The utility model provides an air path conveying system of an air pressure therapeutic apparatus, which is connected between an air pump and a rubber hose and is used for controlling the rubber hose to inflate and deflate an air pressure therapeutic apparatus main body, the air pressure therapeutic apparatus main body comprises a plurality of independent air bags, and each independent air bag is controlled by one rubber hose. Comprising a front end cover, a rear end cover and a valve body clamped between the front end cover and the rear end cover, a cylindrical valve cavity is formed in the valve body, and openings in the two ends of the valve cavity are shielded by the front end cover and the rear end cover respectively; the cylindrical valve element is installed in the valve cavity and limited in the valve cavity through the front end cover and the rear end cover. An inflation and deflation pipeline of the air pressure therapeutic apparatus is improved, and cyclic actions of periodic inflation and deflation of a plurality of independent air bags of the air pressure therapeutic apparatus are realized through a single valve.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic therapy instruments, and particularly relates to a gas path conveying system of a pneumatic therapy instrument. Background Art

[0002] Pneumatic therapy instruments are mostly used to prevent lower limb venous thrombosis caused by various high-risk factors. By sequentially inflating and deflating the air bags of the pneumatic therapy instrument, the treatment effect of conventional massage is achieved, and the incidence of venous thrombosis is significantly reduced. For example, our previous patent CN219307733U increases the extrusion force of the independent air bag by an external application canvas belt, enhances the massage effect, and at the same time adds a double-layer metal flat tube heated by an electric heating wire to raise the temperature of the inflation of the pneumatic therapy instrument to achieve a hot compress effect.

[0003] The pneumatic therapy instrument is provided with a plurality of mutually independent air bags. Generally, a plurality of electromagnetic valves are used to sequentially open and close to control the inflation and deflation of each air bag. However, when a plurality of electromagnetic valves are configured in the control box, on the one hand, the cost will increase significantly. On the other hand, each component has a certain failure rate. Obviously, the more components there are, the higher the overall failure rate of the pneumatic therapy instrument will be. Summary of the Utility Model

[0004] Based on the above technical status quo, the purpose of the utility model is to provide a gas path conveying system of a pneumatic therapy instrument, which improves the inflation and deflation pipelines of the pneumatic therapy instrument, and realizes the cyclic action of periodic inflation and deflation of a plurality of independent air bags of the pneumatic therapy instrument through a single valve.

[0005] The technical scheme adopted by the utility model is as follows: A gas path conveying system of a pneumatic therapy instrument is connected between an air pump and a rubber hose, and is used to control the inflation and deflation of the rubber hose to the main body of the pneumatic therapy instrument. The main body of the pneumatic therapy instrument includes a plurality of independent air bags, and each independent air bag is controlled by a rubber hose.

[0006] It includes a front end cover, a rear end cover, and a valve body clamped between the front and rear end covers. A cylindrical valve cavity is provided in the valve body, and both ends of the valve cavity are open and are respectively blocked by the front end cover and the rear end cover. A cylindrical valve core is installed in the valve cavity and is restricted inside the valve cavity by the front end cover and the rear end cover.

[0007] An axial blind hole is opened at the axis of the valve core, and a plurality of valve holes penetrating the side wall of the valve core are opened on the side wall of the valve core. Each valve hole is communicated with the axial blind hole, and the plurality of valve holes are distributed along a spiral line on the side wall of the valve core, that is, the adjacent two valve holes are spaced a certain distance along the axial direction of the valve core (11) and are also spaced a certain distance along the circumferential direction of the valve core.

[0008] An air pump interface is provided on the front end cover, and the air pump interface is communicated with the axial blind hole of the valve core.

[0009] A plurality of air charging and discharging interfaces are arranged side by side on the side wall of the valve body. During the rotation of the valve core, each valve hole can be correspondingly communicated with an air charging and discharging interface.

[0010] Furthermore, each valve hole extends a certain span angle circumferentially along the side wall of the valve core. Preferably, the span angle is 60°. Of course, it can also be selected as 40°, 50°, etc. The size of the span angle determines the width of the valve hole, thereby determining the length of time for inflating each independent airbag through the valve hole, and it can be generally controlled within the range of 40° - 60°.

[0011] Furthermore, a stepping motor is installed at the rear end cover, and the stepping motor drives the valve core to rotate in the valve cavity; an integral linkage shaft is formed at the end of the valve core near the rear end cover, and a transmission key or a transmission groove is arranged on the side of the linkage shaft.

[0012] Preferably, four valve holes are provided, and four air charging and discharging interfaces are also provided. The four valve holes are sequentially staggered by 40° circumferentially. That is, when the circumferential span of each valve hole is selected as 60°, the total circumferential span occupied by the four valve holes is 120°, and no holes are opened in the other 240° circumferential span. Based on the installation position of the air charging and discharging interface, when the valve core rotates within the 120° range where the four valve holes are located, the pneumatic therapy instrument is in the air inflation or deflation process, and when the valve core rotates within the 240° range without holes, the pneumatic therapy instrument is in the holding process.

[0013] The advantages of the present utility model are as follows: A single valve core realizes the periodic air charging and discharging process of multiple independent airbags of the pneumatic therapy instrument, with lower cost, simpler control, and lower failure rate. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the overall structure of a pneumatic therapy instrument in the prior art;

[0015] Figure 2 is a schematic diagram of the overall structure of the delivery valve of the air circuit delivery system of the pneumatic therapy instrument of the present utility model;

[0016] Figure 3 is the first perspective of the valve core of the structure of the delivery valve in the present utility model;

[0017] Figure 4 is the second perspective of the valve core of the structure of the delivery valve in the present utility model;

[0018] In the figure: 1. Control box, 2. Rubber hose, 3. Pneumatic therapy instrument main body, 4. Delivery valve, 5. Stepping motor, 6. Front end cover, 7. Rear end cover, 8. Valve body, 9. Air pump interface, 10. Air charging and discharging interface, 11. Valve core, 12. Axial blind hole, 13. Valve hole, 14. Linkage shaft, 15. Key groove. Detailed Embodiments

[0019] The following further clarifies the present utility model in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. After reading the present utility model, various equivalent modifications made by those skilled in the art to the present utility model fall within the scope defined by the appended claims of this application.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "vertical" and "outer peripheral surface" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", and "third" are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] In the description of the present utility model, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in the present utility model and the features of different embodiments or examples.

[0023] Figure 1 is a schematic diagram of the overall structure of a pneumatic therapy instrument in the prior art, that is, one of the perspective views of the applicant's previous patent. It can be seen that multiple rubber hoses 2 extend out of the control box 1, and each rubber hose 2 communicates with an independent airbag of the pneumatic therapy instrument main body 3 for inflating and deflating the independent airbag. In traditional instruments, a solenoid valve seat integrated with multiple solenoid valves is also arranged in the control box 1, and the multiple rubber hoses 2 are connected to an air pump through the solenoid valve seat, and each solenoid valve controls the inflation and deflation of one rubber hose 2. The present utility model patent technology has carried out structural design and improvement on the gas path system for controlling the inflation and deflation of multiple rubber hoses 2 at the solenoid valve seat. The following combines the attached Figures 2-4Describe in detail the technical solution of the present utility model.

[0024] Figure 2 It is a schematic diagram of the overall structure of the delivery valve of the air circuit delivery system of the air pressure therapeutic apparatus of the present utility model. The illustrated delivery valve replaces the traditional solenoid valve seat integrating multiple solenoid valves. As shown in the figure, a stepping motor 5 is installed at one end of the delivery valve 4, and the valve core of the delivery valve 4 is driven to rotate by the stepping motor 5. An air pump interface 9 communicating with the air pump is provided at the other end of the delivery valve 4. The main body of the delivery valve 4 consists of a front end cover 6, a rear end cover 7, and a valve body 8 clamped between the front and rear end covers. The stepping motor 5 is fixedly installed on the rear end cover 7, and its transmission shaft is in transmission connection with the valve core in the valve body 8. A through hole is provided on the front end cover 6 as the air pump interface 9. A plurality of air charging and discharging interfaces 10 are arranged side by side on the side of the valve body 8 (four in the illustrated embodiment, and the number corresponds to the number of independent air bags provided in the main body of the air pressure therapeutic apparatus). The air path of the air pump transports gas into the valve body 8 through the air pump interface 9, and after the air path flow is controlled by the valve core in the valve body 8, it is charged and discharged into the independent air bag from the air charging and discharging interfaces 10 on the side of the valve body 8.

[0025] For the structure of the valve core, see Figure 3 and Figure 4 , Figure 3 It is the first perspective of the valve core of the delivery valve structure in the present utility model. Figure 4 It is the second perspective of the valve core of the delivery valve structure in the present utility model. As shown in the figure, the valve core 11 is a cylindrical structure, and an axial blind hole 12 is provided at its axis. The port of the axial blind hole 12 corresponds to the air pump interface 9 for gas to flow outside the valve. A plurality of valve holes 13 penetrating the side wall of the valve core are provided on the side wall of the valve core 11. Each valve hole 13 communicates with the axial blind hole 12. In the illustrated embodiment, there are four, corresponding to the number of air charging and discharging interfaces 10 on the side wall of the valve body 8. Each valve hole 13 extends a certain distance along the circumferential direction of the outer side wall of the valve core 11. For example, the circumferential span angle of each valve hole 13 is 60°; the plurality of valve holes 13 are distributed along a spiral line, that is, the plurality of valve holes 13 are arranged at equal intervals axially along the outer side wall of the valve core 11, and in the circumferential direction, adjacent two valve holes 13 are distributed at intervals of a certain angle. In this embodiment, a circumferential stagger angle of 40° is designed. In the figure, the circumferential span between the left edge of the valve hole 13 closest to the axial blind hole 12 and the right edge of the valve hole 13 closest to the linkage shaft 14 is 120°, that is, the wall surface without holes is within the range of the other 240° circumferential span of the outer side wall of the valve core 11. The axial length of the valve core 11 is adapted to the length of the valve body 8 to install the valve core 11 in the middle circular hole of the valve body 8. The front and rear end covers limit the axial movement of the valve core 11, and only the stepping motor 5 drives the valve core 11 to rotate circumferentially in the valve body 8. Correspondingly, the diameter of the middle circular hole of the valve body 8 is also adapted to the outer diameter of the valve core 11.

[0026] A transmission member, such as a shaft or a groove structure, which is in transmission connection with the stepping motor 5, is arranged at the far end of the axial blind hole 12 of the valve core 11. Refer to Figure 4 , in this embodiment, a linkage shaft 14 is integrally arranged with the valve core 11. A keyway 15 is formed on the side wall of the linkage shaft 14. The linkage shaft 14 passes through the rear end cover 7 and is in transmission connection with the stepping motor 5.

[0027] The following is a further introduction to the working principle of the technology of the present utility model in conjunction with Figures 2-4 :

[0028] The air circuit of the air pump is communicated with the air pump interface 9, and the rubber hoses 2 of the main body 3 of the pneumatic therapy instrument are in one-to-one correspondence and communication with the inflation and deflation interfaces 10. When the pneumatic therapy instrument works:

[0029] During the inflation process, the valve core 11 is driven by the stepping motor 5 to rotate. Refer to Figure 3 , the valve hole 13 closest to the axial blind hole 12 is first communicated with the inflation and deflation interface 10 corresponding to its position. The gas enters the first rubber hose through the valve hole 13 and the inflation and deflation interface 10. The valve core 11 continues to rotate, and the upper valve hole 13 is communicated with the inflation and deflation interface 10 corresponding to it. The second rubber hose connected to the inflation and deflation interface 10 starts to be inflated. In this order, each valve hole 13 is opened in turn to ensure that multiple independent air bags start to be inflated in sequence from bottom to top or from top to bottom. Since each valve hole 13 extends a certain span in the circumferential direction, each valve hole 13 can ensure sufficient inflation time. The valve hole 13 that starts to be communicated first is also closed first as the valve core 11 rotates. The rotation speed of the stepping motor is controlled so that the opening time of each valve hole 13 is the same. After the valve core 11 rotates through the 120° circumferential span where the valve holes 13 are arranged, all the valve holes 13 are in the closed state, and the independent air bags of the pneumatic therapy instrument are all in the pressure maintaining state.

[0030] During the deflation process, after the inflation is completed, the air pump stops working. The stepping motor 5 drives the valve core 11 to continue rotating. When it rotates one week and then rotates to the lowest valve hole 13 and is communicated with the inflation and deflation interface 10 corresponding to it, the corresponding independent air bag starts to deflate in sequence through the rubber hose, the inflation and deflation interface 10, the valve hole 13, the axial blind hole 12, the inflation and deflation interface 10, and the air pump. As the valve core 11 rotates, multiple valve holes 13 deflate in sequence. After rotating 120°, the deflation of the uppermost valve hole 13 ends. The valve core continues to rotate, and the air pump is turned on to start the next round of inflation process. If a long pressure maintaining time is required, that is, to extend the extrusion time of the independent air bag on the lower limb, the rotation speed of the stepping motor can be controlled to be different within the 120° span where the valve holes are opened and within the 240° span where no holes are opened, so as to adjust the inflation and deflation and the length of the pressure maintaining time.

[0031] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A pneumatic therapy instrument air circuit delivery system, connected between an air pump and a rubber hose (2), for controlling the inflation and deflation of the rubber hose (2) to the pneumatic therapy instrument main body (3), the pneumatic therapy instrument main body (3) comprising a plurality of independent air bags, each independent air bag being controlled by a rubber hose (2); characterized in that, it includes a front end cover (6), a rear end cover (7) and a valve body (8) clamped between the front and rear end covers, the valve body (8) being provided with a cylindrical valve cavity, the two open ends of the valve cavity being blocked by the front end cover (6) and the rear end cover (7) respectively; a cylindrical valve core (11) is installed in the valve cavity and is restricted inside the valve cavity by the front end cover (6) and the rear end cover (7); a central blind hole (12) is provided at the axis of the valve core (11), and a plurality of valve holes (13) penetrating the side wall of the valve core are provided on the side wall of the valve core (11), each valve hole (13) communicating with the central blind hole (12), and the plurality of valve holes (13) are distributed along a spiral line on the side wall of the valve core (11), that is, the adjacent two valve holes (13) are spaced apart by a certain distance along the axial direction of the valve core (11) and also spaced apart by a certain distance along the circumferential direction of the valve core (11); an air pump interface (9) is provided on the front end cover (6), and the air pump interface (9) communicates with the central blind hole (12) of the valve core (11); a plurality of inflation and deflation interfaces (10) are arranged side by side on the side wall of the valve body (8), and during the rotation of the valve core (11), each valve hole (13) can correspondingly communicate with an inflation and deflation interface (10).

2. The air path delivery system of the pneumatic therapy apparatus according to claim 1, further characterized in that, Each valve hole (13) extends a certain span angle along the circumferential direction of the side wall of the valve core (11).

3. The air pressure therapeutic apparatus air circuit delivery system according to claim 2, further characterized in that, The span angle is 60°.

4. The pneumatic therapeutic apparatus air path delivery system according to claim 1, further characterized in that, A stepping motor (5) is installed at the rear end cover (7), and the stepping motor (5) drives the valve core (11) to rotate in the valve cavity.

5. The air pressure therapeutic apparatus air circuit delivery system according to claim 3 or 4, further characterized in that, A linkage shaft (14) is integrally formed at the end of the valve core (11) adjacent to the rear end cover (7), and a transmission key or a transmission groove is provided on the side of the linkage shaft (14).

6. The air pressure therapeutic apparatus air circuit delivery system according to claim 5, further characterized in that, There are four valve holes (13) provided, and there are also four inflation and deflation interfaces (10).

7. The air pressure therapeutic apparatus air circuit delivery system according to claim 6, further characterized in that, The four valve holes (13) are staggered by 40° in the circumferential direction in sequence.

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