A micro switch assembly for a pressure regulating valve of a cleaning machine

Abstract

The technical scheme belongs to the technical field of cleaning machine micro switch and specifically relates to a micro switch assembly of a cleaning machine pressure regulating valve, which comprises a shell, an installation cavity one and an installation cavity two are formed in the shell, and the installation cavity one and the installation cavity two are not communicated with each other; a micro switch is installed in the installation cavity one; a magnet one is movably arranged in the installation cavity one; a magnet two is slidably arranged in the installation cavity two; and an elastic member is installed in the installation cavity two and movably abuts against the magnet two. During work, a top rod device does not directly extend into the installation cavity one where the micro switch is located, but the magnet one is driven to trigger the micro switch through the magnetic cooperation between the magnet two in the installation cavity two and the magnet one in the installation cavity one, so that the gun stopping function is realized. The sealing property of the installation cavity one is only needed to be ensured, so that the safe operation of the micro switch can be ensured. Even if the sealing effect of the installation cavity two is poor, water cannot seep into the installation cavity one where the micro switch is located, so that the problem that the micro switch cannot work due to water ingress is avoided.

Description

Technical Field

[0001] This technical solution relates to the field of micro switch technology for cleaning machines, specifically to a micro switch assembly for a pressure regulating valve of a cleaning machine. Background Technology

[0002] A cleaning machine is a machine that uses a power unit to drive a plunger pump to generate high-pressure water to rinse the surface of an object.

[0003] For example, Chinese patent CN201620431191.1 discloses a gun-off and shutdown device for a high-pressure washer and a high-pressure washer, which includes a micro switch device and a push rod device. The micro switch and contact lever are set in the micro switch box. The micro switch box and the push rod sleeve are fixedly connected by a U-shaped pin. The push rod device extends into the micro switch box to trigger the micro switch and realize gun-off and shutdown. However, it still has some shortcomings: the sealing performance between the micro switch box and the push rod sleeve is poor. With long-term use and the vibration generated during the operation of the cleaning machine, the connection between the two is prone to loosening, which can lead to water leakage. Once water leaks, water may enter the micro switch box, causing the micro switch to short-circuit and fail to work properly. Moreover, the push rod of the push rod device needs to be inserted back and forth in the micro switch box, which makes the sealing structure design between the micro switch box and the push rod sleeve complicated and makes it difficult to guarantee the sealing effect, further increasing the possibility of water entering the micro switch box. Utility Model Content

[0004] The purpose of this technical solution is to provide a micro switch assembly for a pressure regulating valve of a cleaning machine. It consists of two non-communicating mounting cavities, namely, a micro switch installed in mounting cavity 1 and a magnet 2 in mounting cavity 2, which works in conjunction with magnet 1 in mounting cavity 1 to trigger the micro switch. This ensures the sealing of mounting cavity 1 and improves the problem of water ingress into the micro switch box and failure of the micro switch to operate normally due to poor sealing between the micro switch box and the top rod sleeve.

[0005] The purpose of this technical solution is achieved as follows: A micro switch assembly for a pressure regulating valve of a cleaning machine, comprising: The housing has two mounting cavities, namely a first mounting cavity and a second mounting cavity, which are not connected to each other. The second mounting cavity is used to connect the pressure regulating valve seat of the cleaning machine for the insertion of the push rod device of the cleaning machine. A micro switch is installed inside the mounting cavity. Magnet one, which is movably disposed within the mounting cavity one, is used to trigger the micro switch; A second magnet is slidably disposed within the second mounting cavity, and the second magnet is used to drive the first magnet to approach the micro switch; An elastic element is installed in the second mounting cavity and movably abuts against the second magnet, used to drive the second magnet away from the first magnet.

[0006] Preferably, a sliding groove is provided in the first mounting cavity, and the first magnet is slidably disposed in the sliding groove. The sliding groove is located at the lower end of the second mounting cavity, and the straight line of the sliding trajectory of the first magnet in the sliding groove is perpendicular to the straight line of the sliding trajectory of the second magnet in the second mounting cavity.

[0007] Preferably, a top block is slidably disposed in the sliding groove, the top block is provided with a mounting groove, and the magnet is installed in the mounting groove.

[0008] Preferably, the elastic element is magnetic. When the elastic element drives the second magnet away from the first magnet, the elastic element and the first magnet are magnetically attracted to each other, thereby moving the first magnet away from the micro switch to avoid the micro switch.

[0009] Preferably, a slider is slidably disposed within the second mounting cavity, the slider is provided with a second mounting groove, and the second magnet is installed within the second mounting groove.

[0010] Preferably, the inner wall of the second mounting cavity is provided with a positioning protrusion, and the side wall of the slider is provided with a positioning protrusion. The positioning protrusion is inserted into one end of the elastic member, and the positioning protrusion is inserted into the other end of the elastic member.

[0011] Preferably, the first mounting cavity is provided with a third mounting groove, the third mounting groove and the sliding groove are arranged side by side, and the third mounting groove and the sliding groove are both located on one side of the second mounting cavity. The third mounting groove is provided with a magnetic element, the magnetic element and the first magnet are magnetically attracted, the magnetic element and the second magnet are magnetically attracted, and the first magnet and the second magnet are like poles and repel each other.

[0012] Preferably, the housing is provided with a connecting hole, which connects the mounting cavity to the outside and is used to connect the pressure regulating valve seat of the cleaning machine. The housing has a plurality of mounting holes, and the sidewalls of the mounting holes are connected to the sidewalls of the connecting holes. The mounting holes are used for the insertion of locking pins, and the locking pin portion is placed inside the connecting holes.

[0013] Preferably, a cover is connected to the housing, the cover is used to close the opening of the first mounting cavity, and a sealing ring is provided between the cover and the opening of the first mounting cavity.

[0014] Preferably, the cover is provided with an electrical wire hole, the micro switch is connected to a cable, the lower end of the cable extends out of the mounting cavity through the electrical wire hole, a locking cap is threaded to the outside of the electrical wire hole, a sealing ring is provided between the locking cap and the electrical wire hole, the sealing ring abuts against the side wall of the cable, and the sealing ring is used to fill the gap between the cable and the electrical wire hole.

[0015] The key and beneficial technical effects of this technical solution compared to existing technologies are: This technical solution involves forming two non-interconnected mounting cavities, namely, mounting cavity one and mounting cavity two, within the housing. A microswitch is installed in mounting cavity one, and magnet one and magnet two are respectively placed in mounting cavity one and mounting cavity two. During operation, there is no need for a push rod device to directly extend into mounting cavity one where the microswitch is located. Instead, the magnetic interaction between magnet two in mounting cavity two and magnet one in mounting cavity one drives magnet one to trigger the microswitch, achieving the gun-off and shutdown function. Only the sealing of mounting cavity one needs to be ensured to guarantee the safe operation of the microswitch. Even if the sealing effect of mounting cavity two is poor, water will not seep into mounting cavity one where the microswitch is located. This avoids the problems of poor sealing between the microswitch box and the push rod sleeve in the original structure, which can easily loosen and leak water due to vibration, leading to water ingress, short circuits, and malfunction of the microswitch. Furthermore, it simplifies the sealing structure design and reduces the difficulty of achieving a seal. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the technical solution.

[0017] Figure 2 This is an exploded view of the technical solution.

[0018] Figure 3 This is a cross-sectional view of the technical solution after it has been installed on the pressure regulating valve seat.

[0019] Figure 4 This is a cross-sectional view of the locking pin and snap-fit ​​ring groove of this technical solution.

[0020] Reference numerals: 301, housing; 302, mounting cavity one; 303, mounting cavity two; 304, micro switch; 305, magnet one; 306, magnet two; 307, elastic element; 308, sliding groove; 309, top block; 310, mounting groove one; 311, slider; 312, mounting groove two; 313, positioning protrusion one; 314, positioning protrusion two; 315, mounting groove three; 316, magnetic element; 317, connecting hole; 318, mounting hole; 319, cover; 320, sealing ring; 321, wire hole; 322, locking cap; 323, sealing ring; 324, locking pin; 325, raised edge; 400, Pressure regulating valve seat; 401, Push rod device; 402, Snap ring groove. Detailed Implementation

[0021] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0022] A micro switch assembly for a pressure regulating valve of a cleaning machine is used to be installed on the valve seat 400 of the pressure regulating valve of the cleaning machine. The start and stop of the micro switch assembly are controlled by the push rod device 401 in the valve seat 400, thereby controlling the start and stop of the cleaning machine. Combination Figure 1 and Figure 2 The microswitch assembly of the pressure regulating valve of the cleaning machine includes: The housing 301 has a first mounting cavity 302 and a second mounting cavity 303 formed therein. The first mounting cavity 302 and the second mounting cavity 303 are not connected to each other. The second mounting cavity 303 is located at the upper end of the first mounting cavity 302. The first mounting cavity 302 and the second mounting cavity 303 are two independent chambers. The left side of the second mounting cavity 303 is used to connect the pressure regulating valve seat 400 of the cleaning machine for the insertion of the push rod device 401 of the cleaning machine. The micro switch 304 is existing technology. For its specific structure, please refer to Chinese patent CN212625302U. It is installed in the mounting cavity 302. Magnet 305 is movably disposed in mounting cavity 302 and is used to trigger micro switch 304. That is, magnet 305 approaches and presses down the button of micro switch 304 to trigger micro switch 304. Magnet 2 306 is slidably disposed in mounting cavity 2 303, and magnet 2 306 is used to drive magnet 1 305 to approach micro switch 304. Push rod device 401 is inserted into mounting cavity 2 303 to drive magnet 2 306 to move closer to magnet 1 305. The elastic element 307, which is a spring or disc spring, is installed in the second mounting cavity 303 and moves against the second magnet 306. That is, the two ends of the elastic element 307 abut against the inner wall of the second mounting cavity 303 and the second magnet 306 respectively. The elastic element 307 is used to drive the second magnet 306 away from the first magnet 305. When the elastic element 307 drives the second magnet 306 away from the first magnet 305, the micro switch 304 resets itself, that is, the button of the micro switch 304 is automatically reset, pushing up the first magnet 305, so that the micro switch 304 is in a non-triggered state. Magnet 1 305 and Magnet 2 306 use neodymium iron boron magnets, samarium cobalt magnets, ferrite magnets, alnico magnets, or iron chromium cobalt magnets.

[0023] Combination Figures 1-3In use, the housing 301 is installed on the pressure regulating valve seat 400. After cleaning the machine gun, the pressure inside the pressure regulating valve seat 400 increases, thereby driving the front end of the push rod device 401 to extend into the second mounting cavity 303. The front end of the push rod device 401 abuts against and overcomes the elastic force of the elastic element to drive the second magnet 306 to slide in the second mounting cavity 303, thereby enabling the second magnet 306 to approach the first magnet 305. The opposite poles of the second magnet 306 and the first magnet 305 repel each other, and the second magnet 306 causes the first magnet 305 to press down the button of the micro switch 304 to trigger the micro switch 304 and stop the cleaning machine.

[0024] When the cleaning machine is working, the pressure inside the pressure regulating valve seat 400 decreases, and the elastic element 307 drives magnet 2 306 away from magnet 1 305. At the same time, magnet 2 306 drives the front end of the push rod device 401 away from the mounting cavity 2 303. At this time, after magnet 2 306 moves away from magnet 1 305, the micro switch 304 is not triggered by its own rebound reset, and the cleaning machine works normally. That is, when magnet 2 306 moves away from magnet 1 305, magnet 1 306... When the weight of magnet 305 acts on the button of micro switch 304, the weight of magnet 305 is insufficient to press down the button of micro switch 304 (micro switch 304 is not triggered). That is, magnet 305 alone is not enough to trigger micro switch 304 when it presses down on the button of micro switch 304. It needs to work with the magnetic repulsion force applied by magnet 306 to magnet 305 to press down the button of micro switch 304 and trigger micro switch 304.

[0025] To prevent the microswitch 304 from being triggered by the magnet 305 due to vibration during the operation of the cleaning machine, and to ensure that the microswitch 304 is not triggered when the water gun of the cleaning machine sprays water, a further solution is that the elastic element 307 is magnetic. The elastic element 307 is made of stainless steel, carbon steel, or iron-nickel soft magnetic alloy. When the elastic element 307 drives the magnet 306 away from the magnet 305, the elastic element 307 and the magnet 305 are magnetically attracted to each other, so that the magnet 305 is moved away from the microswitch 304 to prevent the microswitch 304 from being triggered. Thus, the microswitch 304 is not triggered by the collision of the magnet 305.

[0026] The force exerted by the elastic element 307 on the second magnet 306 is less than the force exerted by the push rod device 401 to drive the second magnet 306 to move. The magnetic attraction force of the first magnet 305 on the elastic element 307 is less than the force exerted by the push rod device 401 to drive the second magnet 306 to move. The magnetic attraction force of the first magnet 305 on the elastic element 307 can ensure that the first magnet 305 will not trigger the micro switch 304 under the influence of its own weight, vibration of the cleaning machine, or external collisions when the cleaning machine is working.

[0027] After the push rod device 401 extends into the second mounting cavity 303, it will trigger the micro switch 304 with the cooperation of the first magnet 305 and the second magnet 306. Since the push rod device 401 needs to extend into or out of the second mounting cavity 303, sealing the second mounting cavity 303 is difficult. Therefore, after installing the micro switch 304 in the first mounting cavity 302, it is only necessary to ensure the sealing of the first mounting cavity 302. The first mounting cavity 302 does not have a structure similar to the push rod device 401 extending or extending, so the sealing difficulty of the first mounting cavity 302 is low, which is convenient for production and maintenance. Even if water leaks into the second mounting cavity 303, it will not cause the micro switch 304 to short circuit. That is, water leakage into the second mounting cavity 303 can also ensure the normal operation of the micro switch 304.

[0028] Combination Figure 1 and Figure 2 A sliding groove 308 is provided in the first mounting cavity 302. The opening of the sliding groove 308 is set towards the micro switch 304. The first magnet 305 is slidably disposed in the sliding groove 308. The sliding groove 308 is located at the lower end of the second mounting cavity 303, and the straight line of the sliding trajectory of the first magnet 305 in the sliding groove 308 is perpendicular to the straight line of the sliding trajectory of the second magnet 306 in the second mounting cavity 303.

[0029] Combination Figure 1 and Figure 2 A top block 309 is slidably disposed within the sliding groove 308. The top block 309 is provided with an installation groove 310. The opening of the installation groove 310 is oriented towards the bottom of the sliding groove 308. A magnet 305 is installed in the installation groove 310 by interference fit or adhesive fit. The top block 309 is used to distinguish the magnetic pole orientation of the magnet 305 during installation, ensuring that the magnetic pole orientation of the magnet 305 is the set orientation after it is installed in the sliding groove 308.

[0030] Combination Figure 1 and Figure 2 A slider 311 is slidably disposed in the second mounting cavity 303. The slider 311 is provided with a second mounting groove 312. The groove opening of the second mounting groove 312 is set towards the first mounting cavity 302. A second magnet 306 is installed in the second mounting groove 312. The slider 311 is used to distinguish the magnetic pole orientation of the second magnet 306 during installation, ensuring that the magnetic pole orientation of the second magnet 306 is the set orientation after it is installed in the second mounting cavity 303.

[0031] Combination Figure 1 and Figure 2 The inner wall of the second mounting cavity 303 is provided with a positioning protrusion 313, and the side wall of the slider 311 is provided with a positioning protrusion 314. The positioning protrusion 313 is inserted into one end of the elastic member 307, and the positioning protrusion 314 is inserted into the other end of the elastic member 307.

[0032] Combination Figure 1 and Figure 2 The mounting cavity 302 is provided with a mounting groove 315, which is arranged side by side with a sliding groove 308. Both the mounting groove 315 and the sliding groove 308 are located at the lower end of the mounting cavity 303. The mounting groove 315 and the sliding groove 308 are located on the inner wall of the mounting cavity 302 near the mounting cavity 303. A magnetic component 316 is provided in the mounting groove 315. The magnetic component 316 is magnetic and is made of iron, stainless steel, carbon steel, or iron-nickel soft magnetic alloy. The magnetic component 316 and magnet 305 are attracted to each other. The magnetic component 316 and magnet 306 are attracted to each other. Magnetic attraction and repulsion are achieved between magnets 305 and 306, which are of the same polarity. Magnetic component 316 ensures that magnet 306 is positioned within the mounting cavity 303 during installation, preventing it from detaching from the cavity under the action of elastic component 307 and ensuring convenient installation. Simultaneously, magnetic component 316 assists elastic component 307 in driving magnet 306 away from magnet 305. The force exerted by elastic component 307 on magnet 306 and the magnetic attraction force of magnetic component 316 on magnet 306 are less than the force exerted by push rod device 401 to move magnet 306.

[0033] like Figure 1 The lower end face of magnet 2 306 and the upper end face of magnet 1 305 are both N poles, or the lower end face of magnet 2 306 and the upper end face of magnet 1 305 are both S poles.

[0034] During the process of the push rod device 401 driving the second magnet 306 to approach the upper end face of the first magnet 305, the axis of the second magnet 306 is always located to the left of the axis of the first magnet 305. That is, the distance between the axis of the second magnet 306 and the push rod mechanism 2 is always less than the distance between the axis of the first magnet 305 and the push rod device 401, ensuring the operational stability when the elastic element 307 drives the second magnet 306 away from the first magnet 305. The axis of the second magnet 306 is perpendicular to the direction of movement of the second magnet 306 in the second mounting cavity 303, and the axis of the first magnet 305 is parallel to the direction of movement of the first magnet 305 in the first mounting cavity 302.

[0035] Combination Figure 1 and Figure 2 The housing 301 is provided with a connection hole 317, which connects the mounting cavity 303 to the outside. The connection hole 317 is used to connect the pressure regulating valve seat 400 of the cleaning machine. The end of the pressure regulating valve seat 400 is provided with a snap ring groove 402. Combination Figures 1-4The housing 301 has several mounting holes 318, and the side wall of the mounting hole 318 is connected to the side wall of the connecting hole 317. The mounting hole 318 is used for the insertion of the locking pin 324, and the side end of the locking pin 324 is placed in the connecting hole 317. The locking pin 324 is a U-shaped locking pin, and both ends of the locking pin 324 are inserted into the corresponding mounting hole 318. When the end of the pressure regulating valve seat 400 is inserted into the connection hole 317, the locking pin 324 is inserted into the mounting hole 318, and part of the locking pin 324 is placed in the connection hole 317 and in the snap ring groove 402, thereby realizing the installation of the housing 301.

[0036] Combination Figure 1 and Figure 2 A cover 319 is connected to the housing 301 by screws. The cover 319 is used to close the opening of the mounting cavity 302. A sealing ring 320 is provided between the cover 319 and the opening of the mounting cavity 302. The sealing ring 320 is a sealing ring and is existing technology.

[0037] Combination Figure 1 and Figure 2 The cover 319 is provided with an electrical wire hole 321. A micro switch 304 is connected to a cable. The lower end of the cable extends out of the mounting cavity 302 through the electrical wire hole 321. A locking cap 322 is threaded to the outside of the electrical wire hole 321. A sealing ring 323 is provided between the protruding edge 325 of the locking cap 322 and the electrical wire hole 321. The protruding edge 325 and the edge of the electrical wire hole 321 compress the sealing ring 323 and cause the sealing ring 323 to elastically deform, thereby causing the sealing ring 323 to abut against the outer wall of the cable. The sealing ring 323 is used to seal the gap between the cable and the electrical wire hole 321 to ensure the sealing of the mounting cavity 302.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

[0039] It should be noted that the structures, proportions, and sizes depicted in the accompanying drawings are solely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation of this technical solution and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this technical solution, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms used in this specification, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity and not intended to limit the scope of implementation of this technical solution. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the technical solution's implementation.

[0040] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0041] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

Claims

1. A micro switch assembly for a pressure regulating valve of a cleaning machine, characterized in that, include: The housing (301) has a first mounting cavity (302) and a second mounting cavity (303) formed therein. The first mounting cavity (302) and the second mounting cavity (303) are not connected to each other. The second mounting cavity (303) is used to connect the pressure regulating valve seat of the cleaning machine for the insertion of the push rod device of the cleaning machine. A micro switch (304) is installed in the mounting cavity (302); Magnet 1 (305) is movably disposed within the mounting cavity 1 (302) and is used to trigger the micro switch (304). Magnet 2 (306) is slidably disposed in mounting cavity 2 (303), and magnet 2 (306) is used to drive magnet 1 (305) to approach the micro switch (304). An elastic element (307) is installed in the second mounting cavity (303) and movably abuts against the second magnet (306) to drive the second magnet (306) away from the first magnet (305).

2. The micro switch assembly for a pressure regulating valve of a cleaning machine according to claim 1, characterized in that: The mounting cavity one (302) is provided with a sliding groove (308), and the magnet one (305) is slidably disposed in the sliding groove (308). The sliding groove (308) is located at the lower end of the mounting cavity two (303), and the straight line of the sliding trajectory of the magnet one (305) in the sliding groove (308) is perpendicular to the straight line of the sliding trajectory of the magnet two (306) in the mounting cavity two (303).

3. The micro switch assembly for a pressure regulating valve of a cleaning machine according to claim 2, characterized in that: A top block (309) is slidably disposed in the sliding groove (308), and the top block (309) is provided with an installation groove (310), in which the magnet (305) is installed.

4. A micro switch assembly for a pressure regulating valve of a cleaning machine according to any one of claims 1-3, characterized in that: The elastic element (307) is magnetic. When the elastic element (307) drives the second magnet (306) away from the first magnet (305), the elastic element (307) and the first magnet (305) are magnetically attracted to each other, so that the first magnet (305) is moved away from the micro switch (304) to avoid triggering the micro switch (304).

5. A micro switch assembly for a pressure regulating valve of a cleaning machine according to any one of claims 1-3, characterized in that: A slider (311) is slidably disposed in the second mounting cavity (303), and the slider (311) is provided with a second mounting groove (312), and the second magnet (306) is installed in the second mounting groove (312).

6. The micro switch assembly for a pressure regulating valve of a cleaning machine according to claim 5, characterized in that: The inner wall of the second mounting cavity (303) is provided with a positioning protrusion (313), and the side wall of the slider (311) is provided with a positioning protrusion (314). The positioning protrusion (313) is inserted into one end of the elastic member (307), and the positioning protrusion (314) is inserted into the other end of the elastic member (307).

7. A micro switch assembly for a pressure regulating valve of a cleaning machine according to claim 2 or 3, characterized in that: The mounting cavity one (302) is provided with a mounting groove three (315), the mounting groove three (315) and the sliding groove (308) are arranged side by side, and the mounting groove three (315) and the sliding groove (308) are both located at the lower end of the mounting cavity two (303). The mounting groove three (315) is provided with a magnetic component (316), the magnetic component (316) and the magnet one (305) are magnetically attracted, the magnetic component (316) and the magnet two (306) are magnetically attracted, and the magnet one (305) and the magnet two (306) are like poles and repel each other.

8. A micro switch assembly for a pressure regulating valve of a cleaning machine according to claim 1, 2, 3, or 6, characterized in that: The housing (301) is provided with a connection hole (317), which connects the mounting cavity (303) to the outside. The connection hole (317) is used to connect the pressure regulating valve seat of the cleaning machine. The housing (301) has a plurality of mounting holes (318), and the sidewall of the mounting hole (318) is connected to the sidewall of the connecting hole (317). The mounting hole (318) is used for the insertion of the locking pin and the locking pin part is placed in the connecting hole (317).

9. A micro switch assembly for a pressure regulating valve of a cleaning machine according to claim 1, 2, 3, or 6, characterized in that: A cover (319) is connected to the housing (301). The cover (319) is used to close the opening of the first mounting cavity (302). A sealing ring (320) is provided between the cover (319) and the opening of the first mounting cavity (302).

10. The micro switch assembly for a pressure regulating valve of a cleaning machine according to claim 9, characterized in that: The cover (319) is provided with an electrical wire hole (321). The micro switch (304) is connected to a cable. The lower end of the cable extends out of the mounting cavity (302) through the electrical wire hole (321). A locking cap (322) is threaded to the outside of the electrical wire hole (321). A sealing ring (323) is provided between the locking cap (322) and the electrical wire hole (321). The sealing ring (323) abuts against the side wall of the cable and is used to fill the gap between the cable and the electrical wire hole (321).

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