Ventilation switching structure of negative pressure regulator

Abstract

To provide a ventilation switching structure for a negative pressure regulator which switches ventilation by rotating a switching cylinder with a knob, and selectively shielding one of branch pipes with a partition wall.SOLUTION: A ventilation switching structure includes a valve body 10, a switching cylinder 20, and a knob 30. The valve body 10 includes a housing groove, a main pipe 12, and branch pipes 13. The branch pipes 13 are connected to a negative pressure device and also connected to the housing groove. The branch pipes 13 are positioned on both sides of the main pipe 12. The switching cylinder 20 is rotatably installed within the housing groove and includes a main passage 21, multiple side passages 22, and a partition wall 23. The side passages 22 communicate with the main passage 21 and are positioned at intervals on one side of the partition wall 23. The knob 30 is coupled to the switching cylinder 20 and can selectively shield one of the branch pipes 13 with the partition wall 23 by rotating the switching cylinder 20. Consequently, the purpose of switching ventilation is achieved.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a negative pressure regulator, and more particularly to an air permeability switching structure for a negative pressure regulator. [Background technology]

[0002] Negative pressure devices are devices commonly used in medical treatment and health care. They are used to achieve the goal of regulating bodily functions by using negative pressure to suck and stimulate acupressure points on the surface of the skin, thereby promoting blood circulation and alleviating discomfort.

[0003] Generally, when using a negative pressure device, the pressure is adjusted by combining a negative pressure regulator. Also, the negative pressure regulator is usually provided with multiple branch pipes, and multiple negative pressure cups are connected to it. However, when only one negative pressure cup is used, it is necessary to plug the branch pipe to which the negative pressure cup is not connected. This brings about inconvenience in use. Also, if the branch pipe is not completely plugged with a plug, gas leakage can easily occur, affecting use.

[0004] In view of the above, the inventor of the present invention has made efforts to solve the above problems by studying the above-mentioned conventional techniques and applying academic theory. That is, this has become the improvement goal for the inventor of the present invention. Summary of the Invention [Problem to be solved by the invention]

[0005] The object of the present invention is to provide an airflow switching structure for a negative pressure regulator which achieves the purpose of switching airflow by rotating a switching tube with a knob and selectively blocking one of the branch pipes with a blocking wall. [Means for solving the problem]

[0006] In order to achieve the above object, the airflow switching structure of the negative pressure regulator of the present invention is connected to a negative pressure device and includes a valve body, a switching tube, and a knob. The valve body includes a housing groove, a main pipe, and a pair of branch pipes. The main pipe is connected to the negative pressure device and to the housing groove, and the pair of branch pipes are located corresponding to both sides of the main pipe. The switching tube is rotatably provided in the housing groove and includes a main path, multiple side paths, and a blocking wall. The side paths are in communication with the main path and are provided on one side of the blocking wall with a gap therebetween. The knob is coupled to the switching tube. The knob rotates the switching tube to selectively block one of the branch pipes with the blocking wall.

[0007] In one embodiment of the present invention, the valve body is provided with a pair of position limiting grooves at the bottom side of the receiving groove, the pair of position limiting grooves are provided at an upper edge of the main pipe with a space therebetween, each position limiting groove is provided as an arc groove and has a circumferential angle smaller than 180 degrees.

[0008] In one embodiment of the present invention, the switching cylinder includes a pair of hooks located on opposite sides of the main passage and hooked respectively into the pair of position restricting grooves.

[0009] In one embodiment of the present invention, the valve body has a flange formed on one side of each position regulating groove, and each hook is hooked onto the flange.

[0010] In one embodiment of the present invention, each side passage is a fan-shaped groove, and the switching cylinder has a partition formed between adjacent side passages.

[0011] In one embodiment of the present invention, the air flow switching structure further includes an airtight ring, the switching tube has an annular groove on the outer periphery of the bypass passage, the airtight ring is disposed in the annular groove and is in close contact with the inner wall surface of the receiving groove.

[0012] In one embodiment of the invention, the annular groove is an elliptical groove.

[0013] In one embodiment of the present invention, the valve body is provided with a number of vent holes, which are provided on the inner wall of the receiving groove and correspond to the positions of the pair of branch pipes.

[0014] In one embodiment of the present invention, the vent holes are provided in pairs at the connection points between the branch pipes and the receiving grooves, and the valve body has a blocking plate formed between adjacent vent holes.

[0015] In one embodiment of the present invention, the air flow switching structure further includes a packing. The switching tube has a groove on a surface facing the main pipe. The packing is disposed in the groove and abuts against a ceiling surface of the main pipe. Effect of the Invention

[0016] Compared with the prior art, the negative pressure regulator of the present invention includes a valve body and a switching tube. The switching tube is rotatably provided within the valve body and includes a main passage, a plurality of side passages, and a blocking wall. The side passages are connected to the main passage and are provided on one side of the blocking wall with a space therebetween. The knob rotates the switching tube to selectively block one of the branch pipes with the blocking wall, thereby achieving the purpose of switching the ventilation. This eliminates the need to plug unused branch pipes with plugs when using one negative pressure cup, which is a step required in conventional negative pressure regulators, and therefore the negative pressure regulator of the present invention is more convenient to use and more practical. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a schematic diagram of the application of a negative pressure regulator in the present invention. [Diagram 2] FIG. 2 is a three-dimensional schematic external view of the negative pressure regulator according to the present invention. [Diagram 3] FIG. 3 is a schematic exploded view of a negative pressure regulator according to the present invention. [Figure 4] FIG. 4 is a cross-sectional assembly view of a negative pressure regulator according to the present invention. [Diagram 5] FIG. 5 is a schematic cross-sectional view of the present invention when the hook of the switching cylinder is inserted into the position regulating groove of the valve body. [Figure 6] FIG. 6 is a cross-sectional view showing the combination of the switching cylinder according to the present invention when it is placed in the receiving groove. [Figure 7] FIG. 7 is a schematic diagram showing the rotation of the knob of the negative pressure regulator according to the present invention. [Figure 8] FIG. 8 is a schematic diagram showing the rotation of the knob of the negative pressure regulator in the present invention. [Figure 9] FIG. 9 is a schematic diagram showing the rotation of the knob of the negative pressure regulator in the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The detailed description and technical contents of the present invention are described below in conjunction with the accompanying drawings, which are provided for reference and explanation only and are not intended to limit the present invention.

[0019] Please refer to FIG. 1, which is a schematic diagram of the application of the negative pressure regulator in the present invention. The negative pressure regulator 1 of the present invention is provided between a negative pressure device 2 and a number of negative pressure cups 3. In this embodiment, these negative pressure cups 3 include a first negative pressure cup 3a and a second negative pressure cup 3b. In addition, the negative pressure regulator 1 is provided with an airflow switching structure for connecting the negative pressure device 2 and the negative pressure cups 3. Furthermore, the present invention allows selective use of the first negative pressure cup 3a or the second negative pressure cup 3b, or simultaneous use of the first negative pressure cup 3a and the second negative pressure cup 3b, by switching using the airflow switching structure.

[0020] Please refer to Fig. 2 to Fig. 4 which are a three-dimensional schematic external view, a schematic exploded view, and an assembly sectional view of the negative pressure regulator of the present invention. The air ventilation switching structure of the negative pressure regulator 1 of the present invention includes a valve body 10, a switching cylinder 20, and a knob 30. The switching cylinder 20 is disposed within the valve body 10. The knob 30 is connected to the switching cylinder 20 and enables the switching cylinder 20 to rotate.

[0021] The valve body 10 includes an accommodation groove 11, a main pipe 12, and a pair of branch pipes 13. The main pipe 12 is connected to the negative pressure device 2 (see FIG. 1) and is also connected to the accommodation groove 11. The pair of branch pipes 13 are connected to the negative pressure cup 3 (see FIG. 1) and are located on both sides of the main pipe 12.

[0022] Specifically, the valve body 10 is provided with a pair of position restriction grooves 111 on the bottom side of the accommodation groove 11. The pair of position restriction grooves 111 are each located corresponding to one side of the pair of branch pipes 13. The valve body 10 is also provided with a plurality of vent holes 14. These vent holes 14 are provided on the inner wall of the accommodation groove 11 and are provided corresponding to the positions of the pair of branch pipes 13. Specifically, these vent holes 14 are provided in pairs at the connection points between each branch pipe 13 and the accommodation groove 11. In addition, the valve body 10 is formed with a blocking plate 15 between adjacent vent holes 14. By providing the blocking plate 15, it is possible to prevent the intrusion of foreign matter and to strengthen the structural strength of the accommodation groove 11.

[0023] The switching cylinder 20 is rotatably provided in the accommodation groove 11, and includes a main passage 21, a plurality of side passages 22, and a blocking wall 23. These side passages 22 communicate with the main passage 21, and are provided on one side of the blocking wall 23 with a gap therebetween. In addition, the knob 30 is coupled to the switching cylinder 20. The knob 30 rotates the switching cylinder 20 to selectively block any one of the branch pipes 13 with the blocking wall 23.

[0024] In this embodiment, each side passage 22 is a sector-shaped groove. The switching tube 20 has a partition 24 formed between adjacent side passages 22. The switching tube 20 also includes a pair of hooks 25. The pair of hooks 25 are located on opposite sides of the main passage 21 and are respectively engaged in the pair of position regulating grooves 111. Preferably, the valve body 10 has a protruding edge 112 formed on one side of each position regulating groove 111. Each hook 25 is engaged with the protruding edge 112.

[0025] In one embodiment of the present invention, the airflow switching structure of the negative pressure regulator 1 further includes an airtight ring 40. The switching tube 20 is provided with an annular groove 220 on the outer periphery of the bypass passage 22. The annular groove 220 is provided as, for example, an elliptical groove. The airtight ring 40 is provided in the annular groove 220 and is in close contact with the inner wall surface of the accommodation groove 11.

[0026] The airflow switching structure of the negative pressure regulator 1 further includes a packing 50. The switching tube 20 has a groove 200 formed on its surface facing the main pipe 12. The packing 50 is disposed in the groove 200 and abuts against the ceiling surface of the main pipe 12.

[0027] 5, which is a schematic cross-sectional view of the hook of the switching cylinder according to the present invention when it is inserted into the position restricting groove of the valve body. The valve body 10 of the present invention is provided with a pair of position restricting grooves 111. The pair of position restricting grooves 111 are provided at an interval on the upper edge of the main pipe 12, and each is provided as an arc-shaped groove with a circumferential angle slightly smaller than 180 degrees. As a result, when the switching cylinder 20 rotates relative to the valve body 10, the hook 25 of the switching cylinder 20 moves in the position restricting groove 111 and restricts the rotation angle of the switching cylinder 20.

[0028] Please also refer to Fig. 6, which is a cross-sectional view of the switching tube 20 according to the present invention when it is placed in the receiving groove. The switching tube 20 includes a main passage 21, two side passages 22, a blocking wall 23, and a partition 24 that divides the side passages 22. Each side passage 22 is provided to form a fan shape and communicates with the main passage 21. The blocking wall 23 is located on one side of the two side passages 22.

[0029] The valve body 10 also includes a housing groove 11, two branch pipes 13, and a plurality of vent holes 14. The switching cylinder 20 is rotatably provided in the housing groove 11. The switching cylinder 20 can select a rotation direction and a rotation angle so that the blocking wall 23 blocks the vent hole 14 on one side and supplies gas to the branch pipe 13 on the other side.

[0030] It should be noted that when the switching tube 20 is in the position shown in FIG. 6 without being rotated, the blocking wall 23 does not block any of the vent holes 14, so that gas is supplied using the branch pipes 13 on both sides simultaneously.

[0031] 7 to 9 are schematic diagrams showing the rotation of the knob of the negative pressure regulator of the present invention. The negative pressure regulator 1 of the present invention can switch the ventilation by rotating the knob 30. When the knob 30 rotates counterclockwise (FIG. 7), the pair of hooks 25 move in the pair of position restriction grooves 111 accordingly. When the knob 30 rotates to a certain angle, the pair of hooks 25 abut against the edge of the position restriction groove 111 and cannot rotate any further (FIG. 8). At this time, the blocking wall 23 blocks the left vent hole 14, making the left branch pipe 13 unusable. Then, the gas flows from the main passage 21 into the side passage 22 and flows from the right vent hole 14 into the right branch pipe 13, thereby switching the ventilation.

[0032] By the same principle, when the knob 30 is rotated clockwise, the blocking wall 23 blocks the right vent hole 14, making the right branch pipe 13 unusable. Gas then flows from the main passage 21 into the side passage 22 and from the left vent hole 14 into the left branch pipe 13, thereby achieving the purpose of switching the ventilation.

[0033] The above description is merely a preferred embodiment of the present invention, and does not limit the scope of the present invention. Any other equivalent modifications that apply the spirit of the patent of the present invention shall fall within the scope of the present invention. [Explanation of symbols]

[0034] 1 Negative pressure regulator 2. Negative pressure device 3 Vacuum Cup 3a 1st vacuum cup 3b Second vacuum cup 10 Valve body 11 Storage Groove 111 Position control groove 112 Edge 12 Master 13 branch pipe 14 Ventilation holes 15 Shielding board 20 Switching Cylinder 200 Groove 21 Main road 22 Side road 220 Circular groove 23 Barrier 24 Partition 25 Hook 30 Picking 40 Airtight Ring 50 Gasket

Claims

1. A ventilation switching structure of a negative pressure regulator connected to a negative pressure device, a valve body including a receiving groove, a main pipe, and a pair of branch pipes, the main pipe being connected to the negative pressure device and the receiving groove, the pair of branch pipes being located on both sides of the main pipe; A switching cylinder that is rotatably provided in the accommodating groove, includes a main passage, a plurality of side passages, and a blocking wall, the plurality of side passages communicate with the main passage, and is provided on one side of the blocking wall with a gap therebetween; and A ventilation switching structure including a knob connected to the switching tube for rotating the switching tube to selectively block any one of the branch pipes with the blocking wall.

2. The valve body has a pair of position control grooves on the bottom side of the accommodating groove, the pair of position control grooves being spaced apart on the upper edge of the main pipe, and each of the pair of position control grooves is provided as an arc-shaped groove and has a circumferential angle smaller than 180 degrees.

3. 3. The airflow switching structure of a negative pressure regulator according to claim 2, wherein the switching tube includes a pair of hooks, the pair of hooks being positioned on opposite sides of the main passage and hooked into the pair of position restriction grooves, respectively.

4. 4. The airflow switching structure for a negative pressure regulator according to claim 3, wherein the valve body has a protruding edge formed on one side of each of the pair of position restriction grooves, and each of the pair of hooks is hooked onto the protruding edge.

5. 2. The airflow switching structure of a negative pressure regulator according to claim 1, wherein each of the plurality of side passages is a sector-shaped groove, and the switching tube has a partition formed between adjacent ones of the plurality of side passages.

6. The airflow switching structure of a negative pressure regulator as described in claim 1, further comprising an airtight ring, the switching tube having an annular groove on the outer periphery of the multiple side passages, the airtight ring being provided within the annular groove and in close contact with the inner wall surface of the accommodating groove.

7. The airflow switching structure of a negative pressure regulator according to claim 6, wherein the annular groove is an elliptical groove.

8. The air vent switching structure of a negative pressure regulator as described in claim 1, wherein the valve body has a plurality of air vent holes, the plurality of air vent holes being provided on the inner wall of the accommodating groove and corresponding to the positions of the pair of branch pipes.

9. The air vent switching structure of a negative pressure regulator as described in claim 8, wherein the air vent holes are provided in pairs at the connection points between each branch pipe and the accommodating groove, and the valve body has a blocking plate molded between adjacent pairs of the air vent holes.

10. The airflow switching structure of a negative pressure regulator as described in claim 1, further comprising a gasket, the switching tube having a groove on the surface facing the main pipe, the gasket being provided within the groove and abutting against the ceiling surface of the main pipe.

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