An automatic high and low water pressure switching device for a shower device

Abstract

The present invention discloses a high and low water pressure automatic switching device for a shower device, which is arranged inside the housing of the shower device and is connected to the water inlet pipeline, and includes a valve body mechanism, a pressure sensing mechanism and an automatic control mechanism; a pressure chamber, a high-pressure channel and a low-pressure channel, as well as a valve core, are arranged inside the valve body mechanism, the pressure chamber is communicated with the water inlet pipeline, and the valve core includes a low-pressure state in which the high-pressure channel is closed and a high-pressure state in which the low-pressure channel is closed; one end of the pressure sensing mechanism extends into the pressure chamber, and the other end is connected to the automatic control mechanism; the automatic control mechanism is arranged outside the valve body mechanism and is connected to the valve core. The present invention relates to the field of sanitary wares, and provides a high and low water pressure automatic switching device for a shower device, which can open the high-pressure channel and the low-pressure channel according to the magnitude of the water pressure flowing through the valve body mechanism, realize automatic switching between high and low water pressures, and does not require battery power supply, thereby effectively reducing the production and use costs.

Description

Technical Field

[0001] The present invention relates to the field of sanitary wares, and more specifically, to an automatic high-low water pressure switching device for a shower device. Background Art

[0002] At present, most shower devices such as shower heads and showers switch between high and low water pressures manually, which is inconvenient and not user-friendly. A few shower devices use electronic switching. Although it is convenient for users to a certain extent, the electronic switching itself has a high cost, and the battery power is also limited and needs to be replaced frequently, which significantly increases the user's usage cost. Summary of the Invention

[0003] An embodiment of the present invention provides an automatic high-low water pressure switching device for a shower device, which is arranged in the housing of the shower device and connected to the water inlet pipeline, and includes a valve body mechanism, a pressure sensing mechanism and an automatic control mechanism;

[0004] A pressure chamber, a high-pressure passage and a low-pressure passage communicating with the pressure chamber, and a valve core are provided in the valve body mechanism. The pressure chamber is communicated with the water inlet pipeline. The valve core includes a low-pressure state in which the high-pressure passage is closed and a high-pressure state in which the low-pressure passage is closed;

[0005] One end of the pressure sensing mechanism extends into the pressure chamber, and the other end is connected to the automatic control mechanism, so as to transmit the pressure of the water flow in the pressure chamber to the automatic control mechanism to drive the valve core to perform a switching action;

[0006] The automatic control mechanism is arranged outside the valve body mechanism and connected to the valve core. When the pressure in the pressure chamber reaches a preset pressure, the automatic control mechanism drives the valve core to switch to the high-pressure state. When the preset pressure is not reached, the automatic control mechanism stores the pressure transmitted by the pressure sensing mechanism and keeps the valve core stationary in the low-pressure state.

[0007] In a possible design, the valve body mechanism includes a water inlet housing and a valve main body that are connected and communicated. A water distribution chamber is provided in the valve main body, and the valve core is arranged in the water distribution chamber; a piston housing is sleeved in the water inlet housing, the pressure chamber is arranged in the piston housing, a piston is provided at one end of the pressure sensing mechanism, the piston slides in the piston housing, and a water passing hole communicating the pressure chamber with the water inlet housing is provided in the piston housing corresponding to the stroke of the piston.

[0008] In a possible design, the pressure sensing mechanism includes a push rod, a piston is provided at one end of the push rod, and the other end of the push rod passes through the water inlet housing and abuts against the automatic control mechanism.

[0009] A possible design, the valve core includes a valve stem rotatably installed in the water distribution cavity and a rotating rod arranged outside the valve body. The rotating rod is fixed to the valve stem and is arranged corresponding to the valve stem to enable the rotating rod and the valve stem to rotate synchronously. The rotating rod is provided with a force application end away from its rotation center.

[0010] A possible design, the automatic control mechanism includes a fixing plate, a lever, a first spring and a second spring;

[0011] The fixing plate is fixed to the outer wall of the housing or the valve body mechanism;

[0012] The lever includes a hinged end and a free end at both ends in its length direction. The hinged end is hinged to the fixing plate, and the free end abuts against the pressure sensing mechanism to enable the pressure sensing mechanism to push the lever to rotate;

[0013] Both ends of the first spring are respectively connected to the free end and the force application end to store the pressure transmitted by the pressure sensing mechanism and pull the force application end away from the initial position;

[0014] The second spring is arranged between the free end and the fixing plate and faces away from the lever to reset the rotating rod.

[0015] A possible design, the automatic control mechanism further includes a swing rod. Both ends of the swing rod are respectively hinged to the force application end and the fixing plate to enable the force application end to drive its rotation. The swing rod is provided with an extension portion extending towards the lever. The hinged end is provided with an elastic abutting portion extending towards the swing rod. When the preset pressure is not reached, the abutting portion abuts against the extension portion to support the swing rod and lock the valve core in the low-pressure state.

[0016] A possible design, a first pin shaft is provided on the free end. One end of the first spring is connected to the first pin shaft. A first sliding groove is arranged on the fixing plate, and the first pin shaft slides in the first sliding groove.

[0017] A possible design, the free end is provided with a third sliding groove, the first pin shaft slides in the third sliding groove, and the third sliding groove and the first sliding groove are arranged in a cross manner.

[0018] A possible design, a guiding piece detachably connected to the fixing plate is arranged on the fixing plate, and the first sliding groove is arranged on the guiding piece.

[0019] A possible design, the valve core further includes a leather cup. The valve stem includes a central end and a closed end. The valve stem rotates around the central end, and the leather cup is arranged at the closed end to seal the high-pressure channel or the low-pressure channel.

[0020] A possible design, a groove is provided at the free end of the lever, an arc-shaped groove wall is provided in the groove, the end of the pressure sensing mechanism extending towards the lever is T-shaped and abuts against the arc-shaped groove wall.

[0021] A possible design, the water passing hole includes a low-pressure hole section and a high-pressure hole section arranged along the sliding direction of the piston, and the width of the low-pressure hole section is smaller than the width of the high-pressure hole section.

[0022] A possible design, including a manual control mechanism, one end of the manual control mechanism extends out of the housing, and the other end is connected to the rotating rod to manually control the state switching of the valve core.

[0023] A possible design, a second sliding groove is provided on the housing, the manual control mechanism includes a swing key and a link assembly that can be telescoped along the length direction, one end of the link assembly is connected to the force application end, the other end extends out of the housing through the sliding groove and is connected to the swing key, the link assembly slides in the second sliding groove, and an abutting surface is provided on the inner surface of the link assembly facing the housing. When the link assembly extends, the abutting surface abuts against the inner surface of the housing to prevent the link assembly from sliding.

[0024] A possible design, the link assembly includes a lower rotating core and an upper rotating core that are rotatably connected, the lower rotating core is fixed to the force application end, the abutting surface is provided on the upper rotating core, and the two end faces of the upper rotating core opposite to the lower rotating core are set as inclined surfaces to rotate the upper rotating core and extend the link assembly.

[0025] A possible design, a limiting portion is provided between the lower rotating core and the upper rotating core to limit the relative rotation angle between the lower rotating core and the upper rotating core; a rubber ring is provided between the abutting surface and the housing.

[0026] The high and low water pressure automatic switching device of the embodiment of the present invention can open the high-pressure channel and the low-pressure channel according to the magnitude of the water pressure flowing through the valve body mechanism, realize the automatic switching of high and low water pressures, and does not require battery power supply, effectively reducing the production and use costs.

[0027] The high and low water pressure automatic switching device of the embodiment of the present invention is also provided with a manual control mechanism, which can manually control the high and low water pressure switching to meet the needs of different user usage scenarios.

[0028] Other features and advantages of the present invention will be described in the subsequent description, and, in part, will be obvious from the description, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation to the technical solution of the present invention.

[0030] Figure 1 It is the first schematic diagram of the high and low water pressure automatic switching device according to an embodiment of the present invention;

[0031] Figure 2 It is the second schematic diagram of the high and low water pressure automatic switching device according to an embodiment of the present invention;

[0032] Figure 3 It is Figure 1 and Figure 2 the split schematic diagram of the high and low water pressure automatic switching device in

[0033] Figure 4 It is Figure 1 the cross-sectional view of the high and low water pressure automatic switching device of

[0034] Figure 5 It is Figure 4 the A-A cross-sectional view of

[0035] Figure 6 It is Figure 5 the B-B cross-sectional view of

[0036] Figure 7 It is Figure 3 the schematic diagram of the piston housing of

[0037] Figure 8 It is Figure 3 the first schematic diagram of the valve body of

[0038] Figure 9 It is Figure 3 the second schematic diagram of the valve body of

[0039] Figure 10 It is Figure 1 the split schematic diagram of the manual control mechanism in

[0040] Figure 11 It is Figure 2 the C-C cross-sectional view of

[0041] Figure 12 It is Figure 1 the schematic diagram of the released state of the manual control mechanism in

[0042] Figure 13 It is Figure 1 the schematic diagram of the locked state of the manual control mechanism in

[0043] Figure 14 It is Figure 1Schematic diagram of the critical state of the high and low water pressure automatic switching device in

[0044] Figure 15 is Figure 1 Schematic diagram of the high pressure state of the high and low water pressure automatic switching device in

[0045] Reference numerals: 1 - valve body mechanism, 2 - pressure sensing mechanism, 3 - automatic control mechanism, 4 - valve body, 5 - upper cover of valve body, 6 - lower cover of valve body, 7 - valve stem, 8 - leather cup, 9 - upper shell of water inlet, 10 - piston shell, 11 - lower shell of water inlet, 12 - ejector rod, 13 - fixing plate, 14 - lever, 15 - swing rod, 16 - rotating rod, 17 - guiding piece, 18 - second spring, 19 - first spring, 20 - lower rotating core, 21 - upper rotating core, 22 - rubber ring, 23 - outer shell, 24 - swing key, 25 - second pin shaft, 26 - first pin shaft, 27 - third pin shaft, 28 - fourth pin shaft, 29 - first sealing ring, 30 - second sealing ring, 31 - third sealing ring, 32 - fourth sealing ring, 33 - bolt, 34 - manual control mechanism, 35 - hinged end, 36 - free end, 37 - groove, 38 - pressure chamber, 39 - piston, 40 - water passing hole, 41 - arc-shaped groove wall, 42 - valve main body, 43 - third chute, 44 - fifth pin shaft, 45 - fourth chute, 46 - extension part, 47 - abutting part, 48 - water distribution chamber, 49 - central end, 50 - rotating rod, 51 - closed end, 52 - high pressure water outlet, 53 - low pressure water outlet, 54 - low pressure hole section, 55 - high pressure hole section, 56 - first split chamber, 57 - high pressure channel, 58 - third split chamber, 59 - water inlet, 60 - low pressure channel, 61 - second split chamber, 62 - rotating groove, 63 - force applying end, 64 - inclined plane, 65 - tongue, 66 - abutting surface, 67 - second chute, 68 - slot, 69 - first chute, 70 - hole, 71 - protrusion. Detailed implementation manners

[0046] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily.

[0047] Please refer to Figures 1 to 15 the high and low water pressure automatic switching device of the shower device of the present invention in Figures 1 to 4As shown in the figure, the high and low water pressure automatic switching device includes a valve body mechanism 1, a pressure sensing mechanism 2, and an automatic control mechanism 3. Among them, a pressure chamber 38, a high-pressure passage 57 and a low-pressure passage 60 communicating with the pressure chamber 38, and a valve core are provided in the valve body mechanism 1. The pressure chamber 38 communicates with the above-mentioned water inlet pipeline, so that the water inlet preferentially enters the pressure chamber 38. The valve core includes a low-pressure state that closes the high-pressure passage 57 and a high-pressure state that closes the low-pressure passage 60. One end of the pressure sensing mechanism 2 extends into the pressure chamber 38, and the other end is connected to the automatic control mechanism 3, so as to transmit the pressure of the water flow in the pressure chamber 38 to the automatic control mechanism 3 and use its pressure to drive the valve core to perform a switching action. The automatic control mechanism 3 is arranged outside the valve body mechanism 1 and is connected to the valve core. When the pressure in the pressure chamber 38 reaches the preset pressure, the automatic control mechanism 3 drives the valve core to switch to the high-pressure state. When the preset pressure is not reached, the automatic control mechanism 3 stores the pressure transmitted by the pressure sensing mechanism 2 and keeps the valve core stationary in the low-pressure state. Thus, the high and low water pressure automatic switching device can open the high-pressure passage and the low-pressure passage according to the water pressure magnitude flowing through the valve body mechanism 1 to realize automatic switching between high and low water pressures without manual operation or the need to set up electronic switching components, which not only improves the convenience of use but also effectively reduces the production and use costs.

[0048] First, regarding the valve body mechanism 1, it can achieve the diversion of high-pressure water and low-pressure water. As Figures 3 to 9 shown, the valve body mechanism 1 includes a water inlet housing and a valve main body 42 that are connected and communicate with each other. Among them, the above-mentioned pressure chamber 38 is provided in the water inlet housing, and a water diversion chamber 48 is provided in the valve main body 42. The above-mentioned valve core is arranged in the water diversion chamber 48. Specifically, the above-mentioned water inlet housing includes a water inlet upper shell 9 and a water inlet lower shell 11 that are connected. It communicates with the valve main body 42, and a third sealing ring 31 is provided at the connection to ensure sealing and prevent water leakage. A piston housing 10 is also sleeved inside the water inlet housing. The above-mentioned pressure chamber 38 is formed inside the piston housing 10. One end of the piston housing 10 is also connected to the above-mentioned water inlet pipeline (not shown in the figure), so that the water flow first flows into the piston housing 10. At the same time, the side wall of the piston housing 10 is provided with a water passing hole 40 to communicate the inside and outside of the piston housing 10, so that the water flow flows out of the piston housing 10 and flows towards the valve main body 42. In addition, a first sealing ring 29 is provided at the connection between the piston housing 10 and the water inlet upper shell 9 to prevent water from leaking out through the gap between the piston housing 10 and the water inlet upper shell 9.

[0049] The above valve body 42 includes a valve body 4, an upper valve body cover 5 and a lower valve body cover 6. The upper valve body cover 5 and the lower valve body cover 6 are respectively arranged on both sides of the valve body 4, enclosing the above-mentioned water distribution cavity 48. The valve body 42 is provided with a water inlet 59 for water inlet, a high-pressure passage 57 and a low-pressure passage 60 for water outlet. The water inlet 59, the high-pressure passage 57 and the low-pressure passage 60 are respectively communicated with the water distribution cavity 48. The water distribution cavity 48 is further separated by a partition in the valve body 4 into a first separate cavity 56, a second separate cavity 61 and a third separate cavity 58. Among them, the water inlet 59 is communicated with the second separate cavity 61 and the third separate cavity 58, the low-pressure passage 60 is communicated with the first separate cavity 56, and the partition in the valve body 4 blocks the water flow from directly entering the third separate cavity 58, so that the water flow uniformly flows into the second separate cavity 61. At the same time, a high-pressure water outlet 52 and a low-pressure water outlet 53 are opened on the partition in the valve body 4, so that the second separate cavity 61 is respectively communicated with the low-pressure passage 60 and the first separate cavity 56. Thus, the water flow in the second separate cavity 61 has two outflow paths, that is, flowing out through the low-pressure passage 60, and flowing out through the first separate cavity 56 and the high-pressure passage 57 in sequence.

[0050] The above valve core specifically includes a valve rod 7 rotatably installed in the second separate cavity 61 and a rotating rod 16 arranged outside the valve body 42. Among them, the two ends of the valve rod 7 in the length direction are respectively a central end 49 and a closed end 51. The central end 49 is provided with a rotating rod 50, which is inserted and matched with a rotating groove 62 on the valve body and equidistant from the high-pressure water outlet 52 and the low-pressure water outlet 53, so that the valve rod 7 can rotate around the central end 49, and the closed end 51 extends to cover the low-pressure water outlet 53 and the high-pressure water outlet 52, so that the valve rod 7 can switch to close the low-pressure water outlet 53 and the high-pressure water outlet 52 by rotation. At the same time, in order to ensure tight sealing, the closed end 51 is provided with a leather cup 8, so that the leather cup 8 is buckled on the low-pressure water outlet 53 or the high-pressure water outlet 52, and tightly seals the high-pressure passage 57 or the low-pressure passage 60. The above central end 49 extends out of the hole 70 on the upper valve body cover 5, and its end is provided with a "-" shaped protrusion 71, which can be connected with the rotating rod 16 to prevent relative rotation between the two. Moreover, the valve rod 7 and the rotating rod 16 are correspondingly arranged in parallel, so that the valve rod 7 and the rotating rod 16 can rotate synchronously. The rotating rod 16 is provided with a force application end 63 far from its rotation center, and a vertical fifth pin shaft 44 is provided on the force application end 63. A fourth sealing ring 32 is provided at the hole 70. The fourth sealing ring 32 is a V-shaped sealing ring, which can prevent water from seeping out from the hole 70. Thus, with the rotation of the rotating rod 16, the valve rod 7 can follow the rotation to switch between the low-pressure state and the high-pressure state.

[0051] Secondly, regarding the pressure sensing mechanism 2, although it is the automatic control mechanism 3 that drives the valve body mechanism 1 to act, the pressure sensing mechanism 2 still needs to transmit pressure to the automatic control mechanism 3 as power. As Figure 1 、 Figure 3 andFigure 4 As shown, the pressure sensing mechanism 2 includes a push rod 12. One end of the push rod 12 is provided with a piston 39, and the other end passes through the water inlet housing and abuts against the automatic control mechanism 3, which converts the water flow pressure into the thrust of the push rod 12. Among them, the piston 39 slides within the above-mentioned piston housing 10. The water inlet housing is provided with a second sealing ring 30 at the position where the push rod 12 extends. The above-mentioned piston housing 10 is provided with the above-mentioned water passing hole 40 corresponding to the stroke of the piston 39. Specifically, the water passing hole 40 includes a low-pressure hole section 54 and a high-pressure hole section 55 arranged along the sliding direction of the piston 39, and the width of the low-pressure hole section 54 is smaller than the width of the high-pressure hole section 55.

[0052] Regarding the automatic control mechanism, as Figures 1 to 4As shown in the figure, it includes a fixed plate 13, a lever 14, a swing rod 15, a first spring 19 and a second spring 18. Among them, the fixed plate 13 is fixed to the inner wall of the housing 23, and the above-mentioned lever 14, swing rod 15, first spring 19 and second spring 18 are arranged on the fixed plate 13. Specifically, the fixed plate 13 is fixed with a second pin shaft 25, a third pin shaft 27 and a fourth pin shaft 28 on the same side thereof. The hinged end 35 of the lever 14 is hinged to the fixed plate 13 through the third pin shaft 27. One end of the swing rod 15 is hinged to the fixed plate 13 through the fourth pin shaft 28, and one end of the second spring 18 is fixed to the second pin shaft 25. In addition, the fixed plate 13 is also connected to the free end 36 of the lever 14, and a guide piece 17 of the split part is fixed on the upper side thereof through a bolt 33. The guide piece 17 is provided with a first chute 69, and a first pin shaft 26 arranged in the first chute 69 is also connected to the free end 36. The free end 36 of the above-mentioned lever 14 extends upward and abuts against the above-mentioned ejector rod 12, so that the pressure sensing mechanism 2 pushes the lever 14 to rotate. A groove 37 is arranged on the free end 36 facing the ejector rod 12, and an arc-shaped groove wall 41 is arranged in the groove 37. The end of the ejector rod 12 extending towards the lever 14 is T-shaped and abuts against the arc-shaped groove wall 41 to ensure the smooth rotation of the lever 14. The free end 36 of the lever 14 is also provided with a third chute 43. The above-mentioned first pin shaft 26 can slide in the third chute 43, and the third chute 43 and the first chute 69 are arranged in a cross manner. The two ends of the above-mentioned first spring 19 are respectively connected to the above-mentioned fifth pin shaft 44 and the first pin shaft 26, so as to store the pressure transmitted by the pressure sensing mechanism 2 and pull the force application end 63 away from the initial position; the above-mentioned second spring 18 is arranged between the fifth pin shaft 44 and the second pin shaft 25 and is on the side of the swing rod 15 facing away from the lever 14, so as to reset the rotating rod 16. The end of the swing rod 15 far away from the fourth pin shaft 28 is hinged to the force application end 63 through a fourth chute 45 and a fifth pin shaft 44, so that the force application end 63 can drive it to rotate. At the same time, the swing rod 15 is provided with an extension part 46 extending towards the lever 14 at the end connected to the fourth pin shaft 28, and a notch is arranged at the end thereof, while the hinged end 35 of the lever 14 is provided with an abutting part 47. The abutting part 47 is an elongated part, so that it has a certain elasticity. It extends towards the swing rod 15. When the preset pressure is not reached, the abutting part 47 can abut against the notch of the extension part 46 to support the swing rod 15 and prevent the swing rod 15 from rotating.

[0053] In addition, as Figures 1 to 3 shown, the high and low water pressure automatic switching device further includes a manual control mechanism 34. One end of the manual control mechanism 34 extends out of the housing 23, and the other end is connected to the rotating rod 16 to manually control the state switching of the valve core. Also as Figure 3 and Figure 10As shown, a second sliding groove 67 is provided on the above-mentioned outer shell 23. The manual control mechanism 34 includes a swing key 24 and a link assembly that can expand and contract along the length direction. One end of the link assembly is connected to the fifth pin shaft 44 of the force application end 63, and the other end extends out of the outer shell 23 through the second sliding groove 67 and is connected to the swing key 24. Moreover, the link assembly can slide within the second sliding groove 67. Specifically, the above-mentioned link assembly includes a lower rotating core 20 and an upper rotating core 21 that are rotatably connected, and a rubber ring 22 sleeved on the upper rotating core 21. Among them, the lower rotating core 20 is fixed at the end of the fifth pin shaft 44, and inclined surfaces 64 are provided on the two end faces of the upper rotating core 21 opposite to the lower rotating core 20, so that when the upper rotating core 21 rotates relative to the lower rotating core 20, the link assembly can extend or retract. An abutting surface 66 is provided on the end face of the upper rotating core 21 facing the inner surface of the outer shell 23. When the link assembly extends, as Figure 12 shown, the abutting surface 66 can tightly press the rubber ring 22 against the inner surface of the outer shell 23 to prevent the link assembly from sliding, and the manual control mechanism 34 is in a locked state. As Figure 11 shown, the link assembly retracts, and there is a gap between its rubber ring 22 and the outer shell 23. The manual control mechanism 34 is in a released state, and its rotating rod 16 is not locked. In addition, as Figure 10 and Figure 11 shown, a limiting portion is provided between the lower rotating core 20 and the upper rotating core 21 to limit the relative rotation angle between the lower rotating core 20 and the upper rotating core 21. Among them, the limiting portion includes a tongue 65 provided at the upper end of the lower rotating core 20 and a slot 68 provided at the lower end of the upper rotating core 21. The cross section of the tongue 65 is semi-circular, and the cross section of the slot 68 is three-quarter circular, so that the tongue 65 can only rotate 90° after being inserted into the slot 68, realizing the limitation of the rotation of the upper rotating core 21 and also the limitation of the rotation of the swing key 24.

[0054] When the high and low water pressure automatic switching device needs to be automatically controlled, the above-mentioned manual control mechanism 34 needs to be in a released state, as Figure 4As shown, there is no water flow inside, and the piston 39 is on one side of the water passing hole 40, so it is necessary to push the piston 39 to the right to make the water flow to the water passing hole 40. At this time, the rotating rod 16 is in the initial position, that is, the fifth pin 44 is in position a; the first pin 26 is at the bottom ends of the third chute 43 and the first chute 69, that is, the first pin 26 is in position b; the abutting part 47 abuts against the extending part 46, and with the pulling force of the second spring 18, the rotating rod 16 can be kept in the initial position, the valve rod 7 blocks the high-pressure passage, and the valve core is in the low-pressure state. Subsequently, water flow is introduced into the device, and the introduced water flow impacts the piston 39 and pushes the ejector rod 12 to move to the right, entering the low-pressure hole section 54, thereby pushing the lever 14 to rotate clockwise, and also causing the first pin 26 to overcome the action of the first spring 19 and move away from the fifth pin 44 along the first chute 69. At this time, although the lever 14 has rotated, the abutting part 47 still abuts against the extending part 46 continuously, so that the swing rod 15 restricts the rotating rod 16, the fifth pin 44 still remains in position a, the first spring 19 is stretched, and the thrust of the ejector rod 12 is stored on the first spring 19. When the pressure of the introduced water flow reaches the preset pressure, as Figure 14 shown, the piston 39 is at the critical position between the low-pressure hole section 54 and the high-pressure hole section 55, and the first pin 26 moves to the top of the first chute 69 and the third chute 43, that is, to position c. At this time, the lever 14 cannot continue to rotate clockwise, the abutting part 47 disengages from the extending part 46, so that the swing rod 15 loses the restraint of rotation. The first spring 19 is stretched so that its pulling force can overcome the pulling force of the second spring 18, and then pull the rotating rod 16 to rotate counterclockwise, and the valve rod 7 also rotates counterclockwise accordingly, blocking the low-pressure passage, the valve core is in the high-pressure state, so that the fifth pin 44 is pulled to position d and remains in this position. When the water pressure drops below the preset pressure again, the piston 39 moves to the left, the lever 14 rotates counterclockwise, and the first pin 26 first returns to position b. At this time, the pulling force of the second spring 18 will be greater than the pulling force of the retracted first spring 19, and pull the rotating rod 16 back to the initial position. In addition, during the counterclockwise rotation of the lever 14, although the abutting part 47 interferes with the extending part 46, the abutting part 47 can use its own elasticity to cross the extending part 46. Thus, this high-low water pressure automatic switching device can automatically complete the state switching from low pressure to high pressure and from high pressure to low pressure, without electronic switching, and the whole process is completed only by the push of water flow.

[0055] When this high-low water pressure automatic switching device needs to be manually controlled, the user first needs to confirm the state of the manual control mechanism. If it is in the locked state, it is necessary to rotate the swing key 24 to make the manual control mechanism become the released state, and then hold the swing key 24 and slide the swing key 24 as required. When it is necessary to lock the manual control mechanism again, just rotate the swing key 24 back.

[0056] Combined with the above embodiments, the high and low water pressure automatic switching device of the embodiments of the present invention can open the high-pressure channel and the low-pressure channel according to the magnitude of the water pressure flowing through the valve body mechanism, realizing automatic switching between high and low water pressures, without the need for battery power supply, effectively reducing the production and use costs. Moreover, the high and low water pressure automatic switching device of the embodiments of the present invention is also provided with a manual control mechanism, which realizes manual control of high and low water pressure switching on the basis of automatic switching, meeting the needs of different usage scenarios of users.

[0057] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "one side", "the other side", "one end", "the other end", "edge", "opposite", "four corners", "periphery", "the "mouth" character structure", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0058] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", "assembly" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", "fixed connection" can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0059] Although the disclosed embodiments of the present invention are as above, the content described is only the embodiments adopted for the convenience of understanding the present invention, and is not used to limit the present invention. Any person skilled in the art within the scope of the present invention, without departing from the spirit and scope disclosed by the present invention, can make any modifications and changes in the form and details of the implementation, but the patent protection scope of the present invention shall still be defined by the appended claims.

Claims

1. An automatic high and low water pressure switching device for a shower device, which is arranged inside the housing of the shower device and connected to the water inlet pipeline, and is characterized in that, It includes a valve body mechanism, a pressure sensing mechanism and an automatic control mechanism; A pressure chamber, a high-pressure passage and a low-pressure passage communicating with the pressure chamber, and a valve core are provided in the valve body mechanism. The pressure chamber communicates with a water inlet pipeline. The valve core includes a low-pressure state for closing the high-pressure passage and a high-pressure state for closing the low-pressure passage; One end of the pressure sensing mechanism extends into the pressure chamber, and the other end is connected to the automatic control mechanism, so as to transmit the pressure of the water flow in the pressure chamber to the automatic control mechanism to drive the valve core to perform a switching action; The automatic control mechanism is arranged outside the valve body mechanism and connected to the valve core. When the pressure in the pressure chamber reaches a preset pressure, the automatic control mechanism drives the valve core to switch to the high-pressure state. When the preset pressure is not reached, the automatic control mechanism stores the pressure transmitted by the pressure sensing mechanism and keeps the valve core stationary in the low-pressure state; The valve body mechanism includes a water inlet housing and a valve main body that are connected and communicate with each other. A water distribution chamber is provided in the valve main body, and the valve core is arranged in the water distribution chamber; A piston housing is sleeved in the water inlet housing, the pressure chamber is arranged in the piston housing, a piston is provided at one end of the pressure sensing mechanism, the piston slides in the piston housing, and a water passing hole communicating the pressure chamber with the water inlet housing is provided in the piston housing corresponding to the stroke of the piston.

2. The automatic high and low water pressure switching device for a shower device according to claim 1, characterized in that, The pressure sensing mechanism includes a push rod. A piston is provided at one end of the push rod, and the other end of the push rod passes through the water inlet housing and abuts against the automatic control mechanism.

3. The automatic high and low water pressure switching device for a shower device according to claim 1, characterized in that The valve core includes a valve rod rotatably installed in the water distribution chamber and a rotating rod arranged outside the valve main body. The rotating rod is fixed to the valve rod and arranged corresponding to the valve rod to make the rotating rod and the valve rod rotate synchronously. The rotating rod is provided with a force application end away from its rotation center.

4. The automatic high and low water pressure switching device for a shower device according to claim 3, characterized in that The automatic control mechanism includes a fixing plate, a lever, a first spring and a second spring; The fixing plate is fixed to the outer shell or the outer wall of the valve body mechanism; The lever includes a hinged end and a free end at both ends in its length direction. The hinged end is hinged to the fixing plate, and the free end abuts against the pressure sensing mechanism to make the pressure sensing mechanism push the lever to rotate; Both ends of the first spring are respectively connected to the free end and the force application end to store the pressure transmitted by the pressure sensing mechanism and pull the force application end away from the initial position; The second spring is arranged between the free end and the fixing plate and faces away from the lever to reset the rotating rod.

5. The automatic high and low water pressure switching device for a shower device according to claim 4, characterized in that, The automatic control mechanism further includes a swing rod. Both ends of the swing rod are respectively hinged to the force application end and the fixing plate to make the force application end drive its rotation; The swing rod is provided with an extension portion extending towards the lever, and the hinged end is provided with an elastic abutting portion extending towards the swing rod. When the preset pressure is not reached, the abutting portion abuts against the extension portion to support the swing rod and lock the valve core in the low-pressure state.

6. The automatic high and low water pressure switching device for a shower device according to claim 4, characterized in that, A first pin shaft is provided on the free end, one end of the first spring is connected to the first pin shaft, a first sliding groove is provided on the fixing plate, and the first pin shaft slides in the first sliding groove.

7. The automatic high and low water pressure switching device for a shower equipment according to claim 6, characterized in that, The free end is provided with a third chute, the first pin shaft slides in the third chute, and the third chute and the first chute are arranged in a cross manner.

8. The automatic high and low water pressure switching device of the shower equipment according to claim 6, characterized in that, The fixing plate is provided with a guiding piece detachably connected thereto, and the first chute is arranged on the guiding piece.

9. The automatic high and low water pressure switching device of the shower equipment according to claim 3, characterized in that, The valve core further includes a leather cup, the valve rod includes a central end and a closed end, the valve rod rotates around the central end, and the closed end is provided with the leather cup for closing the high-pressure passage or the low-pressure passage.

10. The automatic high and low water pressure switching device of the shower device according to claim 4, characterized in that, A groove is arranged at the free end of the lever, an arc-shaped groove wall is arranged in the groove, the end of the pressure sensing mechanism extending towards the lever is T-shaped and abuts against the arc-shaped groove wall.

11. The automatic high and low water pressure switching device for a shower device according to claim 1, characterized in that, The water passing hole includes a low-pressure hole section and a high-pressure hole section arranged along the sliding direction of the piston, and the width of the low-pressure hole section is smaller than that of the high-pressure hole section.

12. The automatic high and low water pressure switching device of the shower equipment according to any one of claims 3-10, characterized in that, It includes a manual control mechanism, one end of the manual control mechanism extends out of the housing, and the other end is connected to the rotating rod to manually control the state switching of the valve core.

13. The automatic high and low water pressure switching device for a shower device according to claim 12, characterized in that, A second chute is arranged on the housing, the manual control mechanism includes a swing key and a connecting rod assembly that can telescopically extend along the length direction, one end of the connecting rod assembly is connected to the force application end, the other end extends out of the housing through the chute and is connected to the swing key, the connecting rod assembly slides in the second chute, and the inner surface of the connecting rod assembly facing the housing is provided with an abutting surface. When the connecting rod assembly extends, the abutting surface abuts against the inner surface of the housing to prevent the connecting rod assembly from sliding.

14. The automatic high and low water pressure switching device for a shower device according to claim 13, characterized in that, The connecting rod assembly includes a lower rotating core and an upper rotating core that are rotatably connected, the lower rotating core is fixed to the force application end, the abutting surface is arranged on the upper rotating core, and the two end faces of the upper rotating core opposite to the lower rotating core are arranged as inclined surfaces to rotate the upper rotating core and extend the connecting rod assembly.

15. The automatic high and low water pressure switching device of the shower equipment according to claim 14, characterized in that, A limiting portion is arranged between the lower rotating core and the upper rotating core to limit the relative rotation angle between the lower rotating core and the upper rotating core; a rubber ring is arranged between the abutting surface and the housing.

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