A medical negative pressure regulator working mode switch

Abstract

This invention discloses a working mode switch for a medical negative pressure regulator, including a valve seat, a slide valve, a sealing gasket, an adjusting component, and an elastic clamping component. The sealing gasket is fixedly mounted on the valve seat, and the slide valve is placed on the sealing gasket and can rotate around the valve seat axis, forming a three-position, five-way torsion planar slide valve structure with the valve seat. The structure has three working positions: closed, adjusting, and straight-through. In addition to the air source port, adjusting port, and straight-through port, it also includes a control port and a vent port. When the three-position, five-way torsion slide valve structure is in the closed position, the control port is closed; when the three-position, five-way torsion slide valve structure is in the open state, the control port connects to the vent port. The closing and venting functions of the control port can be used to externally control the negative pressure generator switch, working in conjunction with it. The adjusting component drives the slide valve, enabling it to rotate within the valve seat and switch between the closed, adjusting, and straight-through working positions. The elastic clamping component is located between the adjusting component and the slide valve, providing elastic clamping force to the slide valve facing the valve seat. This solution enables synchronous operation with medical negative pressure regulators and employs an elastic compression sealing method, offering flexible operation and excellent planar sealing of the slide valve.

Description

Technical Field

[0001] This invention relates to medical negative pressure suction technology, specifically to a working mode switch for a medical negative pressure regulator. Background Technology

[0002] In the field of medical negative pressure aspiration surgery, negative pressure is used as the driving force for surgical suction to remove waste fluids during the procedure. Medical negative pressure aspiration surgery requires a negative pressure regulator to control the magnitude of the suction force, ensuring convenient operation and safe use.

[0003] To ensure ease of use, convenient operation, and safe use, high-performance medical negative pressure regulators are equipped with a working mode switch.

[0004] See Figure 1 and Figure 2 The standard operating mode switch is a three-position, three-way, flat-type torsion valve with three operating modes:

[0005] 1. OFF mode - Turn off the instruments promptly after the surgery;

[0006] 2. REG Adjustment Working Mode - Normal Working Mode: The negative pressure regulating valve is set to the suction pressure according to the specified method, and then negative pressure suction is performed at the set negative pressure value.

[0007] 3. FULL or MAX direct-through or maximum negative pressure working mode - the input negative pressure is directly applied without adjustment, and the output negative pressure value is the maximum negative pressure value, which is used for large-flow suction in emergency situations.

[0008] Furthermore, there are two types of negative pressure sources for conventional negative pressure suction: one is the tubular negative pressure source provided by a medical central suction system, and the other is an external negative pressure source generated by a jet-type negative pressure generator driven by compressed gas when there is no tubular negative pressure source. The negative pressure source is connected to the negative pressure suction device, and the negative pressure suction surgery is performed by the negative pressure suction device.

[0009] Because current medical negative pressure regulators lack a linkage control in their operating mode switch, when using a negative pressure generator as the negative pressure source, the generator cannot be linked to the regulator's operating mode switch to turn on and off simultaneously. The generator must be manually activated to provide negative pressure to the regulator; otherwise, it will not operate. Alternatively, when the regulator stops working, the generator must also be manually deactivated; otherwise, it will remain on, wasting compressed gas. This is particularly inconvenient in emergency situations and easily leads to wasted gas.

[0010] Furthermore, the existing operating mode switch is a three-position, three-way planar torsion valve structure. The sealing of the planar valve relies on the tightness between the planar valve 100 and the valve pressure block 200. The existing operating mode switch lacks elasticity in its tightness, which is entirely controlled by the precision of the machining dimensions. However, machining dimensions have tolerances, making it difficult to guarantee the consistency of the operating mode switch's tightness. If the operating mode switch is too tight, the switch operation becomes inflexible; if it is too loose, the switch cannot seal, causing leakage and affecting the performance of the negative pressure regulator. Summary of the Invention

[0011] In view of the problems in operation and reliability of the existing three-position three-way torsion valve working mode switch for medical negative pressure regulators, the purpose of this invention is to provide a working mode switch for medical negative pressure regulators that can work synchronously with the medical negative pressure regulator and adopts an elastic compression sealing method, which is flexible in operation and has good plane sealing performance of the valve.

[0012] To achieve the above objectives, the present invention provides a medical negative pressure regulator working mode switch, including a valve seat, a slide valve, and an adjustment component, as well as an elastic clamping component. A sealing gasket is fixedly disposed on the valve seat, and the slide valve is mounted on the sealing gasket and can rotate around the axis of the valve seat, forming a three-position five-way torsion slide valve structure with the valve seat. The three-position five-way torsion slide valve structure includes three positions: closed, adjusting, and straight-through, as well as five ports: an air inlet, an adjusting port, a straight-through port, a control port, and an vent port. When the three-position five-way torsion slide valve structure is in the closed state, the control port is closed; when the three-position five-way torsion slide valve structure is in the open state, the control port is connected to the vent port. The closed and vent states of the control port can be used to externally control the negative pressure generator switch, and work in conjunction with it.

[0013] The regulating component drives the connected slide valve, which can drive the slide valve to rotate in the valve seat and switch between the closed working position, the regulating working position and the straight-through working position.

[0014] The elastic clamping assembly is located between the adjusting assembly and the slide valve, and can form a stable elastic clamping force on the slide valve facing the valve seat.

[0015] Furthermore, the valve seat is provided with an inlet hole, a straight outlet hole, an adjustable outlet hole, a control port hole, and an vent hole. The inlet hole, the straight outlet hole, and the adjustable outlet hole are respectively connected to the corresponding external inlet and outlet holes. The control port hole is connected to the corresponding external control port. The vent hole hole is connected to the atmosphere.

[0016] Furthermore, a concave waist-shaped flow channel is provided on the bottom surface of the slide valve facing the valve seat, and the position of the waist-shaped flow channel matches the position of the inlet hole, the straight outlet hole, and the regulating outlet hole on the valve seat; in the corresponding working position, the air inlet is connected to the straight outlet hole or the regulating outlet hole respectively; an exhaust hole is provided on the bottom surface of the slide valve in conjunction with the control port hole on the valve seat.

[0017] Furthermore, the elastic clamping assembly consists of a spring and a cover plate.

[0018] Furthermore, the elastic clamping assembly also includes several elastic limiting mechanisms.

[0019] Furthermore, the adjustment assembly is mounted on the valve seat and mainly consists of a valve stem, a panel, and a knob.

[0020] Furthermore, the adjustment component is mounted on the slide valve.

[0021] The working mode switching scheme for the medical negative pressure regulator provided by this invention has the following advantages compared with the prior art:

[0022] (1) This solution adopts a three-position five-way planar torsion slide valve structure, and innovatively introduces one control inlet and another vent outlet to form an independent switch for switch linkage control. This enables the medical negative pressure regulator switch to remotely control the switch of the matching special negative pressure generator when an external negative pressure generator is used as the negative pressure source, so that it works synchronously with the medical negative pressure regulator.

[0023] (2) In this solution, the pressing method of the working mode switch is improved, the elasticity is increased, and a fully elastic pressing slide valve structure is adopted to overcome the drawbacks caused by dimensional accuracy errors, so that the working mode switch can be operated flexibly and has good sealing performance. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 Here is a structural example diagram of an existing operating mode switch;

[0026] Figure 2 A schematic diagram illustrating the principle of an existing operating mode switch;

[0027] Figure 3 An exploded example diagram of a planar slide valve in an existing operating mode switch;

[0028] Figure 4 This is a schematic diagram illustrating the principle of the three-position five-way planar torsion spool valve in this invention.

[0029] Figure 5 This is a cross-sectional view of the working mode switch of the negative pressure regulator for traditional Chinese medicine in Example 1 of the present invention;

[0030] Figure 6 for Figure 5 A cross-sectional view of the structure shown in the AA direction;

[0031] Figure 7 This is an exploded view of the working mode switch of the negative pressure regulator for traditional Chinese medicine in Example 1 of the present invention;

[0032] Figure 8 This is an example diagram of the back structure of the sealing gasket in Example 1 of the present invention;

[0033] Figure 9 This is a structural example diagram of the valve seat in Example 1 of the present invention;

[0034] Figure 10a This is a front view example of the bottom surface of the slide valve in Example 1 of the present invention;

[0035] Figure 10b This is an example of an oblique view of the bottom surface of the slide valve in Example 1 of the present invention;

[0036] Figure 10c This is an example of an oblique view of the front of the slide valve in Example 1 of the present invention;

[0037] Figure 10d This is a front view example of the slide valve in Example 1 of the present invention;

[0038] Figure 11a This is an example oblique view of the valve cover plate in Example 1 of the present invention.

[0039] Figure 11b This is a front view example of the valve cover plate in Example 1 of the present invention;

[0040] Figure 12 This is an example diagram of the working mode switch of the negative pressure regulator for traditional Chinese medicine in the left working position, as shown in Example 1 of the present invention.

[0041] Figure 13 Example diagram of the working mode switch of the negative pressure regulator for traditional Chinese medicine in Example 1 of the present invention in the working position. Detailed Implementation

[0042] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0043] In view of the problems existing in the working mode switch of the medical negative pressure regulator that adopts the three-position three-way planar torsion slide valve structure, the present invention abandons the three-position three-way structure and innovatively adopts the three-position five-way planar torsion slide valve structure.

[0044] See Figure 4The three-position five-way planar torsion valve structure of this invention mainly includes five channels: an air inlet, an adjustment port, a straight-through port, a control port, and an exhaust port, forming three working positions: OFF, REG, and FULL. Compared with the existing three-position three-way structure, two additional channels are added for control: one is the control port, and the other is the exhaust port. These two channels work together to form an independent switch for switch linkage control. This allows the medical negative pressure regulator switch to simultaneously remotely control the switch of the matching dedicated negative pressure generator when an external negative pressure generator is used as the negative pressure source, enabling it to work synchronously with the medical negative pressure regulator.

[0045] Specifically, in the OFF position, the control port of this three-position five-way planar torsion valve is closed; in other positions (non-closed positions), the control port connects to the vent port for venting. This allows for the control of the on / off of the matching dedicated negative pressure generator using a single pipeline, enabling the negative pressure generator to operate in conjunction with the valve.

[0046] Based on this, the present invention further improves the pressing method of the working mode switch, increases elasticity, and forms a fully elastic pressing slide valve structure, ensuring good pressure consistency of the slide valve switch, overcoming the drawbacks caused by dimensional accuracy errors, making the working mode switch flexible to operate and the slide valve plane sealing good.

[0047] The present invention will be further illustrated below with specific examples.

[0048] See Figures 5-7 This example demonstrates that the working mode switch of a medical negative pressure regulator adopts a three-position five-way planar torsion valve structure. Its main components include valve seat 1, sealing gasket 2, slide valve 3, sliding ring 4, spring 5, sealing ring 6, valve cover plate 7, steel ball 8, small spring 9, valve stem 10, panel 11, knob 12, screw 13, and bolt 14.

[0049] See further Figure 8 In this example, the valve seat 1 is a block with a central disc. The center of the disc is a pin 1-1. An annular concave plane 1-2 is provided near the outer edge of the disc. A retaining edge is provided on the outer edge of the annular concave plane, and an annular shoulder is retained between the inner side and the pin.

[0050] Furthermore, in this example, an inlet hole 1-3, a straight outlet hole 1-4, and an adjusting outlet hole 1-5 are arranged in the annular concave plane 1-2, and multiple countersunk holes 1-6 are also arranged.

[0051] The inlet hole 1-3, the straight outlet hole 1-4, and the regulating outlet hole 1-5 here are all connected to the corresponding external inlet and outlet.

[0052] The arrangement of the countersunk holes 1-6 is not limited here and can be determined according to actual needs. Preferably, in this example, three countersunk holes 1-6 are provided. These three countersunk holes 1-6 are distributed in the annular concave plane 1-2 in an alternating manner with the inlet hole 1-3, the straight outlet hole 1-4, and the regulating outlet hole 1-5. The countersunk holes 1-6 are used to position the boss 2-6 on the back of the sealing gasket 2, fix the sealing gasket 2, and prevent the sealing gasket 2 from rotating with the slide valve 3.

[0053] Furthermore, this example also includes a control port 1-7 located on the lower part of the annular shoulder surface, with a countersunk hole 1-8 for placing a sealing ring on the outer side of the control port. The control port 1-7 thus leads to a corresponding external control port.

[0054] Furthermore, in this example, columns 1-9 are provided on both sides of the valve seat 1. These two columns 1-9 are preferably symmetrically distributed on both sides of the valve seat 1. At the same time, the top of each column 1-9 is a stepped structure, and each stepped surface is provided with a corresponding mounting hole for mounting the valve cover plate 7 and the panel 11.

[0055] Combination Figure 5 and Figure 7 As shown, the sealing gasket 2 in this example is used to form a sealing structure between the valve seat 1 and the slide valve 3.

[0056] For details, see Figure 8 Specifically, the sealing gasket 2 is an annular gasket corresponding to the annular concave plane 1-2 on the valve seat. The sealing gasket 2 is provided with an inlet hole 2-3, a straight outlet hole 2-4, and an adjusting outlet hole 2-5 along the same circumference.

[0057] Furthermore, this example also provides multiple bosses 2-6 on the bottom surface of the sealing gasket, which correspond one-to-one with multiple countersunk holes 1-6 in the annular concave plane of the valve seat 1, to provide sealing positioning and prevent the sealing gasket 2 from rotating with the slide valve.

[0058] In this example, the sealing gasket is fixed on the valve seat, and the slide valve is placed on the sealing gasket. It can rotate around the axis of the corresponding valve seat and form a three-position five-way torsion slide valve structure with the valve seat 1.

[0059] See Figures 10a-10d In this example, the slide valve 3 is specifically a disc-shaped valve with a central hole 3-6. The bottom surface of the slide valve 3 is provided with a concave waist-shaped flow channel 3-1. The position of the waist-shaped flow channel 3-1 matches the positions of the inlet and outlet holes 1-3, the straight outlet hole 1-4, and the regulating outlet hole 1-5 on the valve seat 1, so that the air inlet can be connected to the straight outlet hole or the regulating outlet hole at the corresponding working position.

[0060] Furthermore, in this example, symmetrical exhaust holes 3-7 are provided on the lower part of the annular strip between the central hole 3-6 of the slide valve and the waist-shaped flow channel 3-1, including a first exhaust hole 3-7a and a second exhaust hole 3-7b, both of which lead to the outside.

[0061] The upper part (i.e. the front) of this slide valve 3 is a concave disc 3-2 with a centrally protruding annular column 3-3. Six conical countersunk holes 3-4 are symmetrically arranged on the annular plane between the concave disc 3-2 and the annular column 3-3. Furthermore, in this example, positioning blocks 3-8 are symmetrically arranged on the inner side of the protruding edge of the concave disc 3-2, thereby forming a limiting mechanism with the corresponding steel ball 8 and small spring 9.

[0062] Furthermore, the top of the annular column 3-3 in this slide valve 3 has a straight groove 3-5 for use in conjunction with the valve stem 10.

[0063] In this example, the sliding ring 4, spring 5, and valve cover plate 7 cooperate to form a corresponding elastic clamping assembly, which is used to form an elastic clamping force on the slide valve 3 facing the valve seat 1.

[0064] The sliding ring 4 here is a circular structure, corresponding to the concave disc structure on the upper part of the slide valve 3, and can be placed therein. The spring 5 here is distributed between the sliding ring 4 and the valve cover plate 7, with its two ends abutting against the sliding ring 4 and the valve cover plate 7 respectively. Under the compression of the valve cover plate 7, it can form an elastic clamping force on the slide valve 3 through the sliding ring 4.

[0065] For example, the spring 5 is preferably a helical spring, which can ensure the stability and reliability of the elastic force generated.

[0066] In this example, the sealing ring 6 corresponds to the countersunk holes 1-8 on the valve seat 1, so as to form a sealing structure by mating with the bottom surface of the slide valve 3.

[0067] See Figure 11a and Figure 11b In this example, the valve cover plate 7 is generally flat, with a central through hole 7-2 in the center. One side of the valve cover plate 7 has a boss structure in the center, and the other side has a large countersunk hole 7-1. There are mounting holes 7-5 on both sides in the horizontal direction. Symmetrical small bosses 7-3 are provided at the horizontal position between the large countersunk hole and the mounting hole, and the small bosses have a central countersunk hole 7-4.

[0068] In this example, the steel ball 8 and the small spring 9 work together to form a corresponding elastic limiting mechanism, which is set between the valve cover plate 7 and the slide valve 3. By cooperating with the tapered countersunk hole 3-4 and the positioning block 3-8 on the slide valve 3, the angular displacement of the slide valve 3 rotating in the valve seat 1 is positioned and limited.

[0069] The small spring 9 here is preferably a corresponding helical spring to ensure reliable stability of the elastic force.

[0070] To match the symmetrical structure inside the slide valve 3, two sets of steel balls 8 and small springs 9 are used here.

[0071] In this example, the valve stem 10, panel 11, and knob 12 cooperate with each other to adjust the corresponding components. They are all mounted on the valve seat 1 and drive the connected slide valve 3 to rotate in the valve seat 1, switching between the closed working position, the adjusting working position, and the direct working position.

[0072] The valve stem 10 here is preferably multi-segmented shaft-shaped, with a large front end, a central countersunk hole, and two teeth 10-1 on the end face, corresponding to the straight groove 3-5 at the top of the annular column 3-3 in the slide valve 3. One end of the valve stem 10 passes through the panel 11 and connects to the knob 12, while the other end with the two teeth 10-1 passes through the valve cover plate 7 and the spring 5, and is inserted into the straight groove 3-5 at the top of the annular column 3-3 in the slide valve 3.

[0073] The panel 11 here is used for fixed connection with the valve seat. Specifically, the panel 11 is fixed to the column 1-9 on the valve seat 1 by bolts 13.

[0074] The knob 12 here serves as an operating component, used to drive the valve stem 10 to rotate.

[0075] In this example, the specific structure of panel 11 and knob 12 is not limited and can be determined according to actual needs.

[0076] The following explains the working process of the working mode switch of the TCM negative pressure regulator in this example.

[0077] See Figures 5-8 The working mode switch of this medical negative pressure regulator is assembled in the following manner:

[0078] First, place the sealing gasket 2 in the annular concave plane 1-2 of the valve seat 1. The protrusion 2-6 on the back of the sealing gasket 2 is embedded in the countersunk hole 1-6, with the bottom surface tightly attached and each hole position opposite.

[0079] Next, place the sealing ring 6 into the countersunk hole 1-8 of the valve seat 1. At the same time, insert the center hole of the slide valve 3 into the pin 1-1 of the valve seat 1, pressing it onto the sealing gasket 2 and the sealing ring 6.

[0080] Next, slide ring 4 is fitted onto the annular post 3-3 of slide valve 3 and installed at the bottom; at the same time, spring 5 is placed on top of slide ring 4.

[0081] Next, place the small spring 9 in the center countersunk hole 7-4 of the small boss of the valve cover plate 7, and then place the steel ball 8 on the small spring 9; and install the valve cover plate 7 with the steel ball 8 and the small spring 9 on the two side columns 1-9 of the valve seat 1. The large countersunk hole 7-1 of the valve cover plate 7 covers the spring 5 and presses it tight, and fixes it with screw 13, so that the steel ball 8 falls into the conical countersunk hole 3-4 corresponding to the slide valve 3.

[0082] Next, the valve stem 10, panel 11, and knob 12 are assembled into a single unit and then installed on the two side columns 1-9 of the valve seat 1, and fixed with bolts 14. At this time, the valve stem 10 is inserted into the central through hole 7-2 of the valve cover plate 7, and the two teeth 10-1 on the end face are inserted into the straight groove 3-5 of the slide valve 3.

[0083] The operating process of the working mode switch of the assembled medical negative pressure regulator is as follows:

[0084] During operation, inlet 1-3 of the switch is connected to negative pressure, and control port 1-7 is connected to control pressure.

[0085] When slide valve 3 is in the neutral position, the steel ball 8 falls into the conical countersunk hole 3-4 in the neutral position of slide valve 3 and stays in place. At this time, the waist-shaped flow channel 3-1 of slide valve 3 is only connected to the inlet hole 1-3 of valve seat 1, and the other holes on valve seat 1 are sealed by slide valve 3, and are in the closed state. The negative pressure regulator does not work, and the negative pressure generator also does not work. Figure 5-6 As shown.

[0086] When knob 12 is turned to the left adjustment position, it drives valve stem 10 to turn left. The two teeth 10-1 on the end face of valve stem 10 drive the straight groove 3-5 of slide valve 3, causing slide valve 3 to rotate to the left position. At this time, the steel ball 8 falls into the conical countersunk hole 3-4 in the left position of slide valve, fixing its position. Figure 12 As shown, at this time, the waist-shaped flow channel 3-1 of the slide valve 3 connects the inlet hole 1-3 of the valve seat 1 with the regulating outlet hole 1-5, and the negative pressure is output to the regulating port. The negative pressure regulator can be set to output negative pressure and works according to the set negative pressure value. At the same time, the control port hole 1-7 and the first exhaust hole 3-7a on the left side of the slide valve 3 release pressure and send a signal to the matching special negative pressure generator, and the negative pressure generator then starts to work.

[0087] Similarly, when the slide valve 3 is rotated to the right-hand adjustment position, the two teeth 10-1 on the end face of the valve stem 10 drive the straight groove 3-5 of the slide valve 3, causing the slide valve 3 to rotate to the right position. This causes the steel ball 8 to fall into the tapered countersunk hole 3-4 in the right-hand position of the slide valve 3, fixing its position. Figure 13 As shown, at this time, the waist-shaped flow channel 3-1 of the slide valve 3 connects the inlet hole 1-3 of the valve seat 1 with the straight outlet hole 1-4, and the negative pressure is output to the straight outlet. The negative pressure regulator operates at the maximum negative pressure value. At the same time, the control port 1-7 and the exhaust port 3-7 on the right side of the slide valve 3 release pressure and send a signal to the matching special negative pressure generator, which then starts to work.

[0088] After the negative pressure regulator is used, slide valve 3 is turned to the neutral position, closing the inlet port 1-3 of valve seat 1, and the negative pressure regulator stops working. At the same time, control port 1-7 is closed, no pressure is released, no signal is sent, and the negative pressure generator automatically stops working.

[0089] In this example, when the slide valve 3 rotates, the small boss 7-3 on the valve cover plate 7 cooperates with the positioning block 3-8 on the slide valve 3 to limit the left and right rotation positions.

[0090] As shown above, the novel medical negative pressure regulator operating mode switch presented in this example, through a valve seat with inlet and outlet and a sealing gasket, cooperates with a slide valve with a waist-shaped flow channel and an exhaust port to form a three-position five-way torsion slide valve structure. In the OFF position, the control port is closed; in other positions, the control port connects to the exhaust port for venting. This achieves single-line control of the dedicated negative pressure generator's switch, realizing the linkage between the negative pressure generator and the negative pressure regulator, making it convenient to use and operate.

[0091] Meanwhile, this working mode switch also adopts the structure of a spring-loaded torsion spool valve switch, with the spring force pressing the spool valve to ensure good pressure consistency of the spool valve switch; torsion positioning and limit are achieved through the cooperation of sliding ring, pressure spring, valve cover plate, positioning steel ball and small spring.

[0092] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A working mode switch for a medical negative pressure regulator, comprising a valve seat, a sealing gasket, a slide valve, and an adjusting assembly, characterized in that, It also includes an elastic clamping assembly. A sealing gasket is fixedly installed on the valve seat, and the slide valve is placed on the sealing gasket. It can rotate around the axis of the valve seat and form a three-position five-way torsion planar slide valve structure with the valve seat. The three-position five-way torsion slide valve structure includes three positions: closed, regulating, and straight-through, as well as five ports: air inlet, regulating port, straight-through port, control port, and vent port. The control port and the vent port cooperate to form an independent switch for on / off linkage control. When the three-position five-way torsion slide valve structure is in the closed state, the control port is closed. When the three-position five-way torsion slide valve structure is in the open state, the control port is connected to the vent port to achieve venting. The closed and venting states of the control port can be used to externally control the negative pressure generator switch and work in linkage with it. The regulating component drives the connected slide valve, which can drive the slide valve to rotate in the valve seat and switch between the closed working position, the regulating working position and the straight-through working position. The elastic clamping assembly is located between the adjusting assembly and the slide valve, and can generate an elastic clamping force on the slide valve facing the valve seat.

2. The working mode switch of the medical negative pressure regulator according to claim 1, characterized in that, The valve seat is provided with an inlet hole, a straight outlet hole, an adjustable outlet hole, a control port hole, and an vent hole. The inlet hole, the straight outlet hole, and the adjustable outlet hole are respectively connected to the corresponding external inlet and outlet. The control port hole is connected to the corresponding external control port. The vent hole hole is connected to the atmosphere.

3. The working mode switch of the medical negative pressure regulator according to claim 2, characterized in that, The slide valve has a concave waist-shaped flow channel on its bottom surface facing the valve seat. The position of the waist-shaped flow channel matches the positions of the inlet hole, straight outlet hole, and regulating outlet hole on the valve seat. It can connect the air inlet to the straight outlet hole or the regulating outlet hole in the corresponding working position. The slide valve has an exhaust hole on its bottom surface that matches the control port hole on the valve seat.

4. The working mode switch of the medical negative pressure regulator according to claim 1, characterized in that, The elastic clamping assembly consists of a spring and a cover plate.

5. The working mode switch of the medical negative pressure regulator according to claim 4, characterized in that, The elastic clamping assembly also includes several elastic limiting mechanisms.

6. The working mode switch of the medical negative pressure regulator according to claim 1, characterized in that, The regulating assembly is mounted on the valve seat and mainly consists of a valve stem, a panel, and a knob.

7. The working mode switch of the medical negative pressure regulator according to claim 1, characterized in that, The regulating component is mounted on the slide valve.

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