An ultra-thin flow regulating key switch valve core

Abstract

The present invention relates to an ultra-thin flow-regulating key switch valve core, comprising a valve core body, the valve core body comprising a housing, a control rod, a diaphragm assembly, a flow-regulating assembly, a bouncing structure, a bouncing spring, a starting spring, and a base. The housing is provided with a hydraulic chamber. The flow-regulating assembly comprises a rotary sleeve, a rotary rod, and a slider. The rotary sleeve drives the slider to slide within the housing via the rotary rod. The slider is arranged above the bouncing structure. The bouncing structure is slidably connected within the hydraulic chamber. The bouncing structure comprises an upper gear ring and a lower gear ring. The diaphragm assembly is arranged below the bouncing structure. The diaphragm assembly and the bouncing structure are connected via a bouncing spring. The bouncing structure drives the diaphragm assembly to contact, seal, or separate from the base. The upper end of the control rod extends outward through the diaphragm assembly, the bouncing structure, and the flow-regulating assembly. The outer diameter of the lower portion of the control rod is retracted to form a retracting rod. The two ends of the starting spring are respectively connected to the base and the retracting rod. The present invention can ensure the stability of opening and sealing under ultra-low pressure, reduce the volume of the valve core, and increase the flow regulation range.

Description

Technical Field

[0001] The present invention relates to the field of sanitary ware, and in particular to an ultra-thin flow regulating key switch valve core. Background Art

[0002] Traditional mechanical valve cores are mostly lifting and rotating, while push-button switch valve cores are an upgrade based on the original products. In the process of using products with push-button switch valve cores, there are the following shortcomings: First, the water flow rate of today's adjustable flow push-button switch valve cores is generally very small at low pressure, the flow adjustment range is not obvious, and there may be water leakage at ultra-low pressure, resulting in poor user experience; second, the pressing force of the push-button switch valve core will increase with the increase of water pressure, resulting in the inability to press when the water pressure is too high; third, the large size affects the appearance of the product, making it difficult to adapt to different usage environments, and the application scenarios are limited. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide an ultra-thin flow regulating key switch valve core that is stable and reliable.

[0004] The present invention is achieved through the following technical solutions:

[0005] An ultra-thin flow-regulating push-button switch valve core, characterized in that it includes a valve core body, the valve core body includes a shell, a control rod, a diaphragm assembly, a flow-regulating assembly, a bounce structure, a bounce spring, a starting spring and a base, a water pressure chamber is provided inside the shell, the flow-regulating assembly includes a rotary sleeve, a rotary rod and a slider, the rotary sleeve drives the slider to slide longitudinally through the rotary rod and is connected to the shell, the slider is provided above the bounce structure, the bounce structure is longitudinally slidably connected to the water pressure chamber, the bounce structure includes a coaxially arranged upper gear ring and a lower gear ring, the upper gear ring is provided in the middle of the control rod, the lower gear ring is connected to the control rod, and the lower gear ring is connected to the control rod. The control rod is rotatably connected, and two first retaining rings are provided in the middle of the control rod, and the two first retaining rings are respectively provided on the upper part of the upper gear ring and the lower part of the lower gear ring. The diaphragm assembly is provided below the bouncing structure, and the diaphragm assembly and the bouncing structure are connected by a bouncing spring. The bouncing structure drives the diaphragm assembly to contact and seal or separate with the base. The surface of the diaphragm assembly is provided with a damping hole and a leakage hole. The diaphragm assembly is provided in the base. The upper end of the control rod passes through the diaphragm assembly, the bouncing structure and the flow regulating assembly to extend outward, and the outer diameter of the lower part of the control rod is retracted to form a retraction rod. The two ends of the starting spring are respectively connected to the base surface and the retraction rod.

[0006] According to the above technical solution, preferably, the outer shell includes a guide groove arranged along the longitudinal direction, a first outer shell inclined surface and a second outer shell inclined surface arranged at the lower end of the guide groove, the upper gear ring side surface is provided with an upper gear ring guide tooth, the upper gear ring lower surface is provided with an upper gear ring inclined surface, the lower gear ring side surface is provided with a lower gear ring convex tooth, and the lower gear ring upper surface is provided with a lower gear ring inclined surface.

[0007] According to the above technical solution, preferably, a guide block slidably connected to the guide groove is fixedly connected to the outer wall of the sliding block along the circumferential direction.

[0008] According to the above technical solution, preferably, a transmission channel is opened longitudinally inside the slider, an internal trapezoidal thread is provided in the transmission channel, and an external trapezoidal thread is provided at the lower part of the rotating rod that is compatible with the internal trapezoidal thread. The lower part of the rotating rod is threadedly connected to the transmission channel, and the upper part of the rotating rod is fixedly connected to the bottom end of the rotating sleeve.

[0009] According to the above technical solution, preferably, a shoulder is provided on the upper portion of the retraction rod, and the upper end of the starting spring abuts against the shoulder.

[0010] According to the above technical solution, preferably, the diaphragm assembly includes a damping plate, an O-ring, a diaphragm support plate and a diaphragm, a leakage hole is opened in the middle of the diaphragm support plate, an O-ring is provided around the leakage hole on the upper surface of the diaphragm support plate, the damping plate is clamped above the diaphragm support plate, and the diaphragm is clamped below the diaphragm support plate.

[0011] According to the above technical solution, preferably, a plurality of limiting columns are evenly fixed to the lower surface of the diaphragm support plate along the circumferential direction, a plurality of limiting holes are opened on the surface of the diaphragm relative to the positions of the limiting columns, and each of the limiting columns is arranged through the limiting holes.

[0012] According to the above technical solution, preferably, at least four limiting columns and four limiting holes are provided respectively.

[0013] According to the above technical solution, preferably, the bounce spring is sleeved on the outside of the control rod, and the lower end of the bounce spring is bent vertically downward to form an extension portion, and the extension portion is arranged through the damping hole.

[0014] The beneficial effects of the present invention are:

[0015] First, placing the spring structure within the water pressure chamber reduces the axial dimension of the valve core, making the valve core smaller than other push-button valve cores, making it adaptable to different usage environments and broadening the product's range of use. Second, when the valve body is open, the flow control assembly can adjust the distance between the diaphragm assembly and the base, thereby adjusting the water flow rate out of the valve body, and the flow adjustment range is large. Third, when the low-pressure valve core is opened, the starting spring in the base acts on the shoulder of the control rod to press against the diaphragm assembly, overcoming the spring force of the spring, causing the diaphragm assembly to open to its maximum under the action of the spring force, ensuring stable flow during ultra-low pressure opening. Fourth, when the low-pressure valve core is closed, the spring force of the starting spring acts entirely on the control rod, so that the spring force of the starting spring is not transmitted to the diaphragm assembly, ensuring that the spring force of the spring is not offset by the starting spring when the valve core is closed. At this time, the diaphragm assembly is only subjected to the spring force of the spring, pressing against the base, ensuring the stability of the seal during ultra-low pressure closing. Fifth, due to the small cross-sectional area of ​​the control rod, the pressing force is almost unaffected by changes in water pressure, and the pressing force is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded view of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a main structural cross-sectional view of the shell part of the present invention.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the upper gear ring part of the present invention.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the lower gear ring part of the present invention.

[0020] Figure 5 It is a schematic diagram of the main structure when the spring structure is in state 1 during the opening and closing process of the valve core of the present invention.

[0021] Figure 6 It is a schematic diagram of the main structure when the spring structure is in state 2 during the opening and closing process of the valve core of the present invention.

[0022] Figure 7 It is a schematic diagram of the main structure when the spring structure is in state 3 during the opening and closing process of the valve core of the present invention.

[0023] Figure 8 It is a schematic diagram of the main structure when the spring structure is in state 4 during the opening and closing process of the valve core of the present invention.

[0024] Figure 9 It is a schematic diagram of the main structure of the rotating rod part of the present invention.

[0025] Figure 10 It is a schematic diagram of the three-dimensional structure of the slider part of the present invention.

[0026] Figure 11 It is a schematic diagram of the three-dimensional structure of the rotary sleeve part of the present invention.

[0027] Figure 12 It is a main structural cross-sectional view of the present invention when the valve core is opened.

[0028] Figure 13 It is a front structural cross-sectional view of the present invention when the valve core pushes against the control rod when it is opened.

[0029] Figure 14 It is a front structural cross-sectional view of the present invention when the valve core pushes against the control rod and then releases the control rod when the valve core is opened.

[0030] Figure 15 It is a main structural cross-sectional view of the present invention, which pushes the control rod when the valve core is closed.

[0031] Figure 16 It is a schematic diagram of the valve core regulating water flow rate of the present invention.

[0032] Figure 17 It is a schematic diagram of the three-dimensional structure of the damping plate part of the present invention.

[0033] Figure 18 It is a schematic diagram of the three-dimensional structure of the front side of the diaphragm support sheet of the present invention.

[0034] Figure 19 It is a schematic diagram of the three-dimensional structure of the bottom surface of the diaphragm support sheet of the present invention.

[0035] Figure 20 It is a schematic diagram of the three-dimensional structure of the diaphragm part of the present invention.

[0036] Figure 21 It is a schematic diagram of the three-dimensional structure of the bouncing spring part of the present invention.

[0037] Figure 22 It is a schematic diagram of the structure of the diaphragm assembly part of the present invention when viewed from above.

[0038] Figure 23 It is a schematic diagram of the overall assembly appearance of the present invention.

[0039] Figure: 1, rotary sleeve; 2, retaining ring; 3, pressure cap; 4, housing; 5, O-ring; 6, second retaining ring; 7, rotary rod; 8, slider; 9, first retaining ring; 10, upper gear ring; 11, lower gear ring; 12, bounce spring; 13, filter screen; 14, damping plate; 15, diaphragm support plate; 16, diaphragm; 17, control rod; 18, starting spring; 19, base; 20, first housing slope; 21, second housing slope; 22, guide Groove; 23. Upper gear ring guide tooth; 24. Upper gear ring inclined surface; 25. Lower gear ring convex tooth; 26. Lower gear ring inclined surface; 27. Spline; 28. External trapezoidal thread; 29. ​​Guide block; 30. Internal trapezoidal thread; 31. Positioning channel; 32. Damping hole; 33. Water pressure chamber; 34. Diaphragm assembly; 35. Retraction rod; 36. Shoulder; 37. Positioning groove; 38. Limit column; 39. Limit hole; 40. Extension; 41. Drain hole. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and the best embodiments.

[0041] As shown in the figure, the present invention includes a valve core body, which includes an outer shell 4, a control rod 17, a diaphragm assembly 34, a flow regulating assembly, a bounce structure, a bounce spring 12, a start spring 18 and a base 19, wherein a filter screen 13 is provided in the valve core body, and a fixed seat and a pressure cap 3 are provided above the valve core body. The fixed seat is fixed to the valve core by snapping the retaining ring 2 into the top groove of the outer shell. The pressure cap 3 is under the rotary sleeve 1, and an O-ring is provided in the pressure cap 3. When the pressure cap 3 is screwed up with a tool, the entire valve core can be easily screwed out of the product by pushing the rotary sleeve 1. A water pressure chamber 33 is provided inside the housing 4, and the flow regulating assembly includes a rotary sleeve 1, a rotary rod 7 and a slider 8. The rotary sleeve 1 is connected to the housing by sliding the slider 8 in the longitudinal direction through the rotary rod 7. The slider 8 is provided above the bouncing structure, and the rotary sleeve 1 drives the slider 8 to move downward. The slider 8 pushes the control rod 17 through the bouncing structure, so that the distance between the control rod 17 and the O-ring 5 of the diaphragm assembly 34 gradually decreases, so that the leakage speed of the leakage hole 41 becomes smaller, resulting in a gradual increase in the pressure in the water pressure chamber 33, and the diaphragm assembly 34 moves downward, completing the effect of regulating the water outflow of the valve body. The bouncing structure is connected to the hydraulic chamber 33 by sliding in the longitudinal direction. The bouncing structure includes an upper gear ring 10 and a lower gear ring 11 arranged coaxially. The upper gear ring 10 is arranged in the middle of the control rod 17. The lower gear ring 11 is rotatably connected to the control rod 17. Two first retaining rings 9 are provided in the middle of the control rod 17. The two first retaining rings 9 are respectively provided on the upper part of the upper gear ring 10 and the lower part of the lower gear ring 11. A second retaining ring 6 is also fixed to the control rod 17. The second retaining ring 6 is provided on the rotating rod 7. The diaphragm assembly 34 is provided below the bouncing structure. The diaphragm assembly 34 The control rod 17 is connected to the spring structure via a spring spring 12, which drives the diaphragm assembly 34 to seal or separate from the base 19. A damping orifice 32 and a drain hole 41 are provided on the surface of the diaphragm assembly 34. The diaphragm assembly 34 is located within the base 19. The upper end of the control rod 17 extends outward through the diaphragm assembly 34, the spring structure, and the flow regulating assembly. The lower outer diameter of the control rod 17 is inwardly contracted to form a retracted rod 35. The upper portion of the retracted rod 35 is provided with a shoulder 36. The upper end of the starter spring 18 abuts against the shoulder 36, and the lower end of the starter spring 18 is connected to the base 19. When the valve core is in the open state, the control rod 17 is separated from the O-ring 5, the drain hole 41 is opened, and the pressure in the water pressure chamber 33 decreases to the same as the pressure outside the valve core. Under the action of the water pressure and the spring spring 12, the diaphragm assembly 34 moves upward to open the water path. Pressing the button moves the control rod 17 downward. At this time, the control rod 17 is sealed with the O-ring 5, the drain hole 41 is closed, and the pressure in the water pressure chamber 33 increases to the same as the water inlet pressure. Under the action of the water pressure and the rebound spring 12, the diaphragm assembly 34 is sealed with the base 19, closing the water path and closing the valve core.

[0042] According to the above embodiment, the housing preferably includes a guide groove 22 arranged longitudinally, a first housing inclined surface 20 and a second housing inclined surface 21 provided at the lower end of the guide groove 22, an upper gear ring guide tooth 23 provided on the side surface of the upper gear ring, an upper gear ring inclined surface 24 provided on the lower surface of the upper gear ring, a lower gear ring convex tooth 25 provided on the side surface of the lower gear ring, and a lower gear ring inclined surface 26 provided on the upper surface of the lower gear ring. During the process of operating the valve core to open and close, the spring structure has four states. In state 1, the guide teeth 23 of the upper gear ring and the convex teeth 25 of the lower gear ring move up and down in the guide groove 22; in state 2, the control lever 17 is pressed to push the upper gear ring and the lower gear ring until the convex teeth 25 of the lower gear ring are separated from the guide groove 22 in the housing. Under the action of the rebound spring 12, the lower gear ring moves up and rotates along the inclined surface 24 of the upper gear ring and hangs on the concave part of the teeth in the upper gear ring. At this time, the convex teeth 25 of the lower gear ring are below the first housing inclined surface 20; in state 3, the control lever 17 is released. Under the action of the spring force, the convex teeth 25 of the lower gear ring move up and rotate along the inclined surface 20 of the first housing until Finally, it is hung in the recess of the first outer shell inclined surface 20. At this time, the convex teeth 25 of the lower gear ring are again below the upper gear ring inclined surface 24; State 4: Press the control lever 17 again to push the upper and lower gear rings until the convex teeth 25 of the lower gear ring are disengaged from the guide groove 22 in the outer shell. Under the action of the bounce spring 12, the lower gear ring moves up and rotates along the upper gear ring inclined surface 24, and hangs in the recess of the middle teeth of the upper gear ring. At the same time, it is below the second outer shell inclined surface 21. After releasing the hand, the convex teeth 25 of the lower gear ring move up and rotate along the second outer shell inclined surface 21, and finally slide into the guide groove 22, returning to state 1.

[0043] The specific working principle is as follows:

[0044] When the valve core is open, the spring mechanism is in state 1, and the control rod 17 and O-ring 5 are separated. Water flows into the hydraulic chamber 33 through the gap between the spring spring 12 and the damping orifice 32, and then rapidly flows out through the gap between the control rod 17 and the drain hole 41, causing the water pressure in the hydraulic chamber 33 to drop rapidly from the inlet pressure P1 to the outlet pressure P2. The valve body's inlet cross-sectional area is S1, and the cross-sectional area of ​​the hydraulic chamber 33 is S2. The spring force generated by the starting spring 18 is Fstart, which acts on the diaphragm assembly 34 through the shoulder 36 of the control rod 17. At this point, P1*S1+P2*(S2-S1)+Fstart>P2*S2+Fspring at both ends of the diaphragm assembly 34. The diaphragm assembly 34 moves upward, separating from the base 19, and the valve core opens.

[0045] When the valve core opens, it pushes against the control rod 17, which pushes against the upper ring gear via the retaining ring. The upper ring gear pushes against the lower ring gear, which in turn pushes against the diaphragm assembly 34 via the rebound spring 12 until the lower ring gear protrusion 25 disengages from the housing guide groove 22. Under the action of the rebound spring 12, the rebound structure reaches state 2. Simultaneously, the control rod 17 and the O-ring 5 gradually approach each other, and the gap between them gradually decreases until they are in contact and sealed. Therefore, at this time, the water pressure P3 in the hydraulic chamber 33 gradually increases from P2 to P1. Both ends of the diaphragm assembly 34 move downward under the condition of P1*S1+P2*(S2-S1)<P3*S2+F, until the diaphragm assembly 34 contacts and seals with the base 19, closing the waterway.

[0046] Release control rod 17. It moves upward under the action of the two springs, while bounce spring 12 pushes against the lower ring gear. The lower ring gear's convex teeth 25 move upward and rotate along the first housing slope 20, ultimately resting against the end of the first housing slope 20 and reaching state 3. At this point, control rod 17 seals against O-ring 5, blocking drain hole 41. Water is trapped in hydraulic chamber 33, and the pressure there gradually rises to P1. At this point, P1*S1 < P1*S2 + F at both ends of diaphragm assembly 34, ensuring the stability of the seal between diaphragm assembly 34 and base 19, and the valve core closes.

[0047] When the valve core is closed, the control rod 17 is pushed, and the gear ring is pushed downward through the first retaining ring. At this time, the gear ring reaches state 4. After being released, the control rod 17 moves upward under the action of the starting spring 18, driving the upper and lower gear rings to move upward along the guide groove 22 until state 1, and the valve core returns to the open state.

[0048] According to the above embodiment, preferably, the outer wall of the slider 8 is fixedly connected with a guide block 29 slidably connected to the guide groove 22 along the circumferential direction, and a transmission channel is opened longitudinally inside the slider 8, and an internal trapezoidal thread 30 is provided in the transmission channel. The lower part of the rotary rod 7 is provided with an external trapezoidal thread 28 adapted to the internal trapezoidal thread 30, and the lower part of the rotary rod 7 is threadedly connected to the transmission channel. The upper part of the rotary rod 7 is fixed to the bottom end of the rotary sleeve 1. The rotary sleeve 1 and the rotary rod 7 can be connected in a variety of ways, so that the rotary sleeve 1 drives the rotary rod 7 to rotate. In this example, a positioning channel 31 is opened longitudinally in the middle part of the rotary sleeve 1, and a spline 27 is provided on the upper part of the rotary rod 7. A keyway adapted to the spline 27 is opened in the positioning channel 31, and the rotary sleeve 1 drives the rotary rod 7 to rotate by cooperating with the spline 27 in the rotary rod 7.

[0049] The valve core regulates the water flow rate as follows: Rotating the rotary sleeve 1 rotates the rotary rod 7, which, through its trapezoidal threads, drives the slider 8 downward. The slider 8 pushes against the upper ring gear, which pushes against the lower ring gear, which, through the first retaining ring 9, pushes against the control rod 17. As the control rod 17 moves downward, the distance between the O-ring 5 and the control rod 17 gradually decreases, reducing the flow rate from the drain hole 41. This causes the pressure in the hydraulic chamber 33 to gradually increase to P4, between the inlet pressure P1 and the outlet pressure P2. The diaphragm assembly 34 moves downward until the pressure across the diaphragm assembly 34 reaches P1*S1+P2*(S2-S1)=P4*S2+F, achieving dynamic equilibrium. The more the rotary sleeve 1 rotates, the more the slider 8 moves downward, and the more the control rod 17 moves downward, lowering the position of the diaphragm assembly 34 in dynamic equilibrium. At this point, the distance between the diaphragm assembly 34 and the base 19 decreases, resulting in a smaller outlet area S3 and a smaller outflow rate.

[0050] According to the above embodiment, preferably, the diaphragm assembly 34 includes a damping plate 14, an O-ring 5, a diaphragm support plate 15 and a diaphragm 16, a leakage hole 41 is opened in the middle of the diaphragm support plate 15, an O-ring 5 is provided around the leakage hole 41 on the upper surface of the diaphragm support plate 15, a positioning groove 37 is opened downward in the middle of the upper surface of the diaphragm support plate 15, the leakage hole 41 is provided in the positioning groove 37, and the O-ring 5 is fixed in the positioning groove 37. The damping plate 14 is clamped onto the top of the diaphragm support plate 15 to limit the position of the O-ring 5. In this example, an inner locating ring is provided along the circumferential edge of the damping plate 14, and an outer locating ring is provided along the circumferential edge of the diaphragm support plate 15. The inner locating ring is clamped to the outer locating ring, wherein two clamping plates are provided on the inner locating ring, and the ends of the two clamping plates protrude outward to form a clamping block. The outer locating ring has clamping holes on its surface relative to the clamping block position of the clamping plate, and the inner locating ring is clamped to the outer locating ring via the clamping plate. The diaphragm 16 is clamped onto the bottom of the diaphragm support plate 15. A plurality of limiting posts 38 are uniformly fixed to the lower surface of the diaphragm support plate 15 along the circumferential direction. A plurality of limiting holes 39 are provided on the surface of the diaphragm relative to each limiting post 38. Each limiting post 38 is provided through the limiting hole 39, and there are at least four limiting posts 38 and at least four limiting holes 39, respectively.

[0051] According to the above embodiment, the spring 12 is preferably sleeved onto the outside of the control rod 17. The lower end of the spring 12 is bent vertically downward to form an extension 40, which is disposed through the damping orifice 32. The spring 12 is positioned above the diaphragm assembly 34 and within the hydraulic chamber 33. The distal end of the spring 12 extends vertically through the damping orifice 32, allowing relative movement during valve operation. This prevents the damping orifice 32 from becoming clogged by scale and other debris, ensuring stable valve switching even when water quality is poor.

[0052] Through the above technical solution, the present invention can achieve the following beneficial effects: First, the bouncing structure is placed in the water pressure chamber 33, which reduces the axial size of the valve core, making the volume of the valve core smaller than other button valve cores, and can adapt to different usage environments, thereby broadening the scope of use of the product; Second, when the valve body is opened, the distance between the diaphragm assembly 34 and the base 19 can be adjusted by the flow regulating assembly, thereby completing the adjustment of the water flow rate of the valve body, and the flow regulation range is large; Third, when the low water pressure valve core is opened, the starting spring 18 in the base 19 presses against the diaphragm assembly 34 through the upper shoulder 36 of the action control rod 17, overcoming the spring of the bouncing spring 12 force, so that the diaphragm assembly 34 opens to the maximum under the action of the spring force, ensuring the stability of the flow when the ultra-low pressure is opened; fourth, when the low water pressure valve core is closed, since the spring force of the starting spring 18 all acts on the control rod 17, the spring force of the starting spring 18 will not be transmitted to the diaphragm assembly 34, ensuring that the spring force of the bounce spring 12 will not be offset by the starting spring 18 when the valve core is closed. At this time, the diaphragm assembly 34 is only subjected to the spring force of the bounce spring 12 and pressed on the base 19, ensuring the stability of the seal when the ultra-low pressure is closed; fifth, since the cross-sectional area of ​​the control rod 17 is small, the pressing force is almost unaffected by the water pressure change and the pressing force is stable.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An ultra-thin flow regulating key switch valve core, characterized in that: The valve core body includes a shell, a control rod, a diaphragm assembly, a flow regulating assembly, a bouncing structure, a bouncing spring, a starting spring and a base. A water pressure chamber is provided inside the shell. The flow regulating assembly includes a rotary sleeve, a rotary rod and a slider. The rotary sleeve drives the slider to slide longitudinally through the rotary rod and is connected to the shell. The slider is provided above the bouncing structure. The bouncing structure is connected to the water pressure chamber along the longitudinal direction. The bouncing structure includes a coaxially arranged upper gear ring and a lower gear ring. The upper gear ring is provided in the middle of the control rod. The lower gear ring is rotatably connected to the control rod. Two first retaining rings are provided in the middle of the control rod. The two first retaining rings are respectively provided on the upper part of the upper gear ring and the lower part of the lower gear ring. The diaphragm assembly is provided below the bouncing structure. The diaphragm assembly and the bouncing structure are connected by a bouncing spring, and the bouncing structure drives the diaphragm assembly to contact, seal or separate from the base. A damping hole and a discharge hole are provided on the surface of the diaphragm assembly. The diaphragm assembly is arranged in the base. The upper end of the control rod passes through the diaphragm assembly, the bouncing structure and the flow regulating assembly and extends outward. The outer diameter of the lower part of the control rod is retracted to form a retraction rod. The two ends of the starting spring are respectively connected to the base surface and the retraction rod. The shell includes a guide groove arranged in the longitudinal direction, a first shell inclined surface and a second shell inclined surface arranged at the lower end of the guide groove, an upper gear ring guide tooth is provided on the side surface of the upper gear ring, an upper gear ring inclined surface is provided on the lower surface of the upper gear ring, a lower gear ring convex tooth is provided on the side surface of the lower gear ring, and a lower gear ring inclined surface is provided on the upper surface of the lower gear ring; The outer wall of the slider is fixedly connected to a guide block in a circumferential direction and in sliding connection with the guide groove; A transmission channel is longitudinally opened inside the slider, and an internal trapezoidal thread is provided in the transmission channel. The lower part of the rotary rod is provided with an external trapezoidal thread adapted to the internal trapezoidal thread. The lower part of the rotary rod is threadedly connected to the transmission channel, and the upper part of the rotary rod is fixedly connected to the bottom end of the rotary sleeve. The rotary rod drives the slider to move downward through the trapezoidal thread, the slider pushes the upper gear ring, the upper gear ring pushes the lower gear ring, and the lower gear ring pushes the control rod through the first retaining ring; When the valve core is opened, the distance between the diaphragm assembly and the base is adjusted by the flow regulating assembly to adjust the water flow rate of the valve core; When the valve core is opened, the starting spring in the base acts on the upper shoulder of the control rod to press against the diaphragm assembly, overcoming the spring force of the bounce spring, so that the diaphragm assembly opens to the maximum under the action of the spring force, ensuring stable flow when opening at ultra-low pressure; When the valve core is closed, the spring force of the starting spring acts entirely on the control rod, and the diaphragm assembly is only subjected to the spring force of the bounce spring and pressed on the base, ensuring the stability of the seal when closed at ultra-low pressure.

2. The ultra-thin flow regulating key switch valve core according to claim 1, characterized in that: A shaft shoulder is provided on the upper portion of the retraction rod, and the upper end of the starting spring abuts against the shaft shoulder.

3. The ultra-thin flow regulating key switch valve core according to claim 2, characterized in that: The diaphragm assembly includes a damping plate, an O-ring, a diaphragm support plate and a diaphragm. A leakage hole is opened in the middle of the diaphragm support plate, and an O-ring is provided on the upper surface of the diaphragm support plate around the leakage hole. The damping plate is clamped on the top of the diaphragm support plate, and the diaphragm is clamped on the bottom of the diaphragm support plate.

4. The ultra-thin flow regulating key switch valve core according to claim 3, characterized in that: A plurality of limiting posts are evenly fixed to the lower surface of the diaphragm support sheet along the circumferential direction. A plurality of limiting holes are opened on the surface of the diaphragm at positions corresponding to the limiting posts, and each limiting post is arranged to pass through the limiting hole.

5. The ultra-thin flow regulating key switch valve core according to claim 4, characterized in that: There are at least four limiting columns and four limiting holes, respectively.

6. The ultra-thin flow regulating key switch valve core according to claim 1, characterized in that: The bounce spring is sleeved on the outside of the control rod, and the lower end of the bounce spring is bent vertically downward to form an extension portion, and the extension portion is arranged through the damping hole.

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