A structure of water stopping and a top spray shower

Abstract

The application provides a water-off stop structure, which comprises a water passing cavity, a variable cavity, a water passing flow channel, a water outlet nozzle and a switch valve; the water passing cavity is arranged between the water outlet nozzle and the water passing flow channel; the switch valve is communicated with the water passing flow channel when water is on, and the switch valve is reset to disconnect the communication between the water passing flow channel and the water passing cavity when water is off; the variable cavity is reduced in volume when water is on, and the variable cavity is increased in volume when water is off, so that the residual water in the water passing cavity is sucked into the variable cavity through the water passing flow channel when water is off, and a negative pressure is formed in the water passing cavity after the valve core of the switch valve disconnects the communication between the water passing flow channel and the water passing cavity. The application also provides a top spray shower, which comprises a top spray shower body and the water-off stop structure.

Description

TECHNICAL FIELD

[0001] The present application relates to bathroom products, in particular to a water outlet device. BACKGROUND

[0002] Some shower heads in the prior art are provided with a movable plate in the body, which can move up and down in the cavity and is used to seal the water outlet hole. A pressure cavity is formed between the movable plate and the water outlet panel. When the shower is turned on and the buoyancy of the water in the pressure cavity is sufficient to lift the movable plate, the shower will start to discharge water. When the shower is turned off, the buoyancy of the water in the pressure cavity decreases rapidly, so that the movable plate seals the water outlet hole again, and the shower stops discharging water, achieving the effect of preventing dripping after showering. Since the movable plate has a certain weight, it takes time to accumulate enough water pressure in the pressure cavity before the shower actually starts to discharge water, so it has the defects of high starting water pressure and delayed water discharge.

[0003] Therefore, a water outlet device is disclosed in Chinese Patent CN216631236U, which uses a variable cavity to relieve negative pressure when the water is turned off, so that the volume of the variable cavity increases to form a negative pressure cavity, and the residual water in the water outlet cavity is sucked into the negative pressure cavity, achieving the effect of stopping immediately when the water is turned off. However, there are many types of top spray shower heads, and the diameters or areas of different top spray shower heads are different. Therefore, the amount of residual water that the variable cavity needs to suck in varies for different top spray shower heads. Therefore, different variable cavities need to be designed according to different shower heads, which is quite troublesome. SUMMARY

[0004] The main technical problem to be solved by the present application is to provide a structure that stops immediately when the water is turned off, which can control the amount of residual water sucked into the variable cavity, thereby changing the vacuum degree of the water passage cavity after the water is turned off.

[0005] To solve the above technical problems, the present application provides a structure that stops immediately when the water is turned off, which includes a water passage cavity, a variable cavity, a water passage, a water outlet nozzle, and a switch valve. The water passage cavity is arranged between the water outlet nozzle and the water passage.

[0006] The switch valve is connected to the water passage cavity and the water passage when the water is turned on, and the switch valve is disconnected from the water passage cavity and the water passage when the water is turned off. The variable cavity generates negative pressure when the water is turned on, so that the volume of the variable cavity decreases. When the water is turned off, the negative pressure disappears, and the volume of the variable cavity increases. When the water is turned off, the residual water in the water passage cavity is sucked into the variable cavity through the water passage, and negative pressure is formed in the water passage cavity after the valve core of the switch valve disconnects the connection between the water passage and the water passage cavity.

[0007] In a preferred embodiment, the stroke of the variable cavity when the water is turned off is S1, the stroke of the valve core of the switch valve when the water is turned off is S2, and S1>S2.

[0008] In a preferred embodiment, the water passing channel comprises an accelerating channel with a cross section decreasing along the water flow direction, and the communication between the water passing channel and the variable chamber is located downstream of the accelerating channel along the water flow direction.

[0009] In a preferred embodiment, the on-off valve further comprises an adjusting member for adjusting the stroke of the valve core in the water-off position, so as to change the volume of the water passing chamber filled with residual water in the variable chamber, and to adjust the vacuum degree of the water passing chamber after water-off.

[0010] In a preferred embodiment, the adjusting member is used to adjust the position of the valve body along the movement direction of the valve core.

[0011] In a preferred embodiment, the valve body is arranged in the mounting hole of the fixed seat to form the water passing chamber, the adjusting member is a thread arranged between the side wall of the valve body and the inner wall of the mounting hole, the valve body is provided with a water inlet for connecting the water passing chamber and the water passing channel, the valve core is located at the first position in the water-off position to make the sealing member on the valve core disconnect the communication between the water inlet and the water passing chamber, and the valve core is located at the second position in the water-on position to make the sealing member on the valve core open the communication between the water inlet and the water passing chamber.

[0012] In a preferred embodiment, the on-off valve further comprises an operating member for moving the valve body relative to the mounting hole, so as to adjust the height difference between the sealing member on the valve core and the communication between the water inlet and the water passing chamber when the valve core is located at the second position.

[0013] In a preferred embodiment, the on-off valve further comprises a first reset member, and the valve core extrudes the first reset member to accumulate elastic reset force in the water-on position.

[0014] In a preferred embodiment, a face cover is further provided, the face cover is provided with the water outlet nozzle, a plurality of first ribs are arranged on the side of the face cover facing the water passing channel, the plurality of first ribs and the fixed seat enclose a plurality of independent areas, each independent area is arranged as a water passing chamber, and each water passing chamber is provided with an on-off valve.

[0015] The present application provides a top spray shower, which comprises a top spray shower body and the water-off stop structure as described above.

[0016] In a preferred embodiment, the top spray shower body is provided with a mounting cavity, and a piston is arranged in the mounting cavity to divide the mounting cavity into the variable chamber and a chamber in communication with the atmosphere; in the water-on position, the variable chamber forms a negative pressure to make the piston move under the action of the atmosphere to reduce the volume of the variable chamber and extrude the second reset member to accumulate elastic reset force.

[0017] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0018] 1. The present application provides a water-off stop structure, an additional water passage is arranged at the communication part of the water passage and the water outlet, the water passage is opened when water flows and closed when water stops. Since the closing of the water passage is realized by the reset of the on-off valve, the valve core of the on-off valve needs to pass through a certain reset stroke to close the water passage after water stops, and in this reset stroke, the residual water in the water passage is sucked by the variable chamber, so as to form a negative pressure in the water passage. By designing different reset strokes, the amount of water sucked by the water passage can be differentiated, so as to form water passages with different vacuum degrees. Since the water passage has a vacuum degree after water stops, the atmospheric pressure outside can block the residual water in the water passage, so as to realize the water-off stop effect. Since the vacuum degree can be adjusted, the water-off stop requirements of different showers with different diameters, different areas or different swing angles can be met by designing different reset strokes, so as to realize the modular water-off stop requirement.

[0019] 2. The present application provides a water-off stop structure, the reset stroke of the valve core can be adjusted after leaving the factory, for example, when the user is away from home for a long time and does not need to use the shower, the reset stroke of the valve core can be adjusted to the shortest, so that the amount of residual water sucked by the variable chamber can be ignored, the vacuum degree of the water passage is low, and the residual water in the water passage will not accumulate in the water passage, preventing the residual water from staying in the water passage for a long time to breed bacteria.

[0020] 3. The present application provides a water-off stop structure, when water flows, the water flows through the accelerating flow passage with a smaller cross-sectional area to accelerate, according to Bernoulli equation, the pressure energy decreases, so that a negative pressure is generated on the variable cross-section flow passage, the through hole on the variable cross-section flow passage is communicated with the variable chamber, so that the air in the variable chamber is sucked, and the piston moves inward under the action of the atmospheric pressure and the spring force.

[0021] When water stops, the negative pressure at the through hole disappears (returns to the state of approximately atmospheric pressure), the piston moves outward under the action of the spring force and the atmospheric pressure, at this time, the air in the variable chamber generates a negative pressure due to the increase of the volume of the variable chamber, and the residual water in the water passage is sucked into the variable chamber through the through hole. Thus, the water-off stop effect is realized. Since the variable chamber is independently arranged outside the water passage, the decrease of the volume of the variable chamber when water flows does not depend on the water pressure acting on the variable chamber, so that water can be smoothly discharged even if the water pressure is low when water flows. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the appearance perspective view of the shower in the preferred embodiment of the present application.

[0023] Figure 2 isometric view of the shower head in the preferred embodiment of the present application;

[0024] Figure 3 cross-sectional view of the shower head in the preferred embodiment of the present application in the water-on state;

[0025] Figure 4 cross-sectional view of the shower head in the preferred embodiment of the present application in the water-off state;

[0026] Figure 5 front view of the face cover in the preferred embodiment of the present application;

[0027] Figure 6 schematic diagram of the gravity and the adsorption force in the preferred embodiment of the present application in the inclined state of the shower head;

[0028] Figure 7 partial enlarged view of the face cover in the preferred embodiment of the present application;

[0029] Figure 8 isometric view of the shower head in the preferred embodiment of the present application; Figure 4 partial enlarged view of the face cover in the preferred embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application, and all the other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments in the present application shall fall within the protection scope of the present application.

[0031] In the description of the present application, it should be noted that the terms “upper”, “lower”, “inner”, “outer”, “top / bottom end” and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms “first” and “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood in a broad sense, for example, "connected" can be wall-mounted connection, can be detachable connection, or integral connection, can be mechanical connection, can be electrical connection, can be direct connection, can be indirect connection through intermediate medium, can be internal communication of two elements, and those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0033] Reference Figures 1-4 The embodiment provides a top-spraying shower, which comprises a top-spraying shower body 1 and a water-off-stop structure, and the water-off-stop structure is used for realizing complete water stop of the top-spraying shower after water is turned off, and residual water cannot continuously drop.

[0034] In the embodiment, the top-spraying shower body 1 comprises a decorative cover 11, a face cover 12 and a rear shell 13; the face cover 12 and the rear shell 13 are spliced, and the decorative cover 11 is arranged on a side of the face cover 12 away from the rear shell 13. A connecting seat 14 is arranged in the top-spraying shower body 1, and a giving-opening opening for exposing part of the connecting seat 14 is arranged on the rear shell 13, so that the part of the connecting seat 14 exposed outside the rear shell 13 is swing-connected with a ball head 2.

[0035] In order to realize the water-off-stop effect, the water-off-stop structure comprises a water passing cavity 31, a variable cavity 32, a water passing flow channel 33 and a switch valve 34; the water passing cavity 31 is arranged between a water outlet nozzle 121 of the face cover 12 and the water passing flow channel 33; the water passing flow channel 33 is used for introducing municipal water into the top-spraying shower body 1 through the ball head 2 and the connecting seat 14, then the water is shunted to each water passing cavity 31 through a water shunting body 15 in the top-spraying shower body 1, and then the water can realize normal water outlet through the water outlet nozzle 121 in communication with each water passing cavity 31.

[0036] To realize the effect of stopping water when water is off, the variable chamber 32 needs to be smaller in volume when water is on and larger in volume when water is off, so that the residual water in the water passing chamber 31 is sucked into the variable chamber 32 when water is off, and the switch valve 34 is communicated with the water passing chamber 31 and the water passing flow channel 33 when water is on under the action of water pressure; the switch valve 34 is disconnected with the water passing chamber 31 and the water passing flow channel 33 when water is off. Because the variable chamber 32 generates negative pressure when water is on to make the variable chamber smaller in volume, and the negative pressure disappears when water is off, the variable chamber becomes larger in volume, and a certain amount of air in the variable chamber re-forms negative pressure due to the increase in volume, so that the residual water in the water passing chamber 31 is sucked into the variable chamber 32 through the water passing flow channel 33 when water is off, and negative pressure is formed in the water passing chamber 31 after the valve core 341 of the switch valve 34 disconnects the communication between the water passing flow channel 33 and the water passing chamber 31.

[0037] Therefore, when the switch valve 34 is disconnected with the water passing chamber 31 and the water passing flow channel 33 after resetting, the variable chamber 32 can no longer suck the residual water from the water passing chamber 31, so that the water suction amount of the variable chamber 32 can be changed by controlling the resetting stroke of the valve core 341 of the switch valve 34, so as to change the vacuum degree of the negative pressure chamber formed in the water passing chamber 31 after water is off.

[0038] From the above description, it can be seen that, to meet the above process, the water suction time of the variable chamber 32 needs to be greater than the resetting time of the valve core 341, otherwise, the valve core 341 is still in the resetting process, and the variable chamber 32 has completed water suction, so that no matter how the resetting stroke of the valve core 341 is adjusted, the water suction amount of the variable chamber 32 cannot be changed. Therefore, the stroke of the variable chamber 32 when the volume becomes larger when water is off is S1, the stroke of the valve core 341 of the switch valve 34 when resetting when water is off is S2, and S1>S2 needs to be met.

[0039] The water-stopping structure is provided with an additional water passage cavity 31 at the communication between the water passage 33 and the water outlet 121. The water passage cavity 31 is opened when water flows and closed when water stops. Since the closing of the water passage cavity 31 is realized by the reset of the switch valve 34, the valve core 341 of the switch valve 34 needs to pass through a certain reset stroke to close the water passage cavity 31 after water stops. During the reset stroke, the residual water in the water passage cavity 31 is sucked by the variable cavity 32, so as to form a negative pressure in the water passage cavity 31. By designing different reset strokes, the amount of water sucked by the water passage cavity 31 can be differentiated, so as to form the water passage cavity 31 with different vacuum degrees. Since the water passage cavity 31 has a vacuum degree after water stops, the atmospheric pressure outside can block the residual water in the water passage cavity 31, so as to realize the water-stopping effect. Since the vacuum degree can be adjusted, the water-stopping effect of different shower heads with different diameters, different areas or different swing angles can be met by designing different reset strokes, so as to realize the modular water-stopping effect.

[0040] In the embodiment, the water passage 33 includes an accelerating flow passage 331 with a cross section decreasing along the water flow direction. The communication between the water passage 33 and the variable cavity 32 is located downstream of the accelerating flow passage 331 along the water flow direction, and is specifically a through hole 332.

[0041] To form the variable cavity 32, the left and right sides of the connecting seat 14 are respectively connected with a piston seat 321. The piston seat 321 is provided with an installation cavity, and a piston 322 is arranged in the installation cavity to divide the installation cavity into the variable cavity 32 and a cavity in communication with the atmosphere.

[0042] When water flows, the water flow is accelerated after passing through the accelerating flow passage 331. According to the Bernoulli equation, the pressure energy decreases, so that a negative pressure is generated on the through hole 332 on the variable cross section flow passage. The through hole 332 on the variable cross section flow passage is in communication with the variable cavity 32, so as to suck the air in the variable cavity 32 to form a negative pressure in the variable cavity 32. Further, the piston 322 moves inward under the action of the atmospheric pressure to overcome the elastic reset force of the second reset member 323, so as to reduce the volume of the variable cavity 32.

[0043] When the water is closed, the negative pressure at the through hole 332 disappears (returns to the state of approximately atmospheric pressure), the piston 322 is moved outward under the elastic reset force of the second reset member 323 and the action of the approximately atmospheric pressure, overcoming the external atmospheric pressure, at this time, the air in the variable chamber 32 is under negative pressure due to the increase of the volume of the variable chamber 32, and the residual water in the water passing chamber 31 is sucked into the variable chamber 32 through the through hole 332. Thus, the effect of fast stopping when the water is closed is achieved. And since the variable chamber 32 is independently arranged outside the water passing flow channel 33, the decrease of the volume of the variable chamber 32 when the water is passing does not depend on the water pressure acting on the variable chamber 32, so that the water can be smoothly discharged even if the water pressure is relatively low when the water is passing.

[0044] The switch valve 34 in the embodiment further comprises an adjusting member 346 for adjusting the position of the valve body 342 along the movement direction of the valve core 341, so as to adjust the reset stroke of the valve core 341 when the water is closed, and further change the volume of the residual water in the water passing chamber 31 sucked into the variable chamber 32, so as to adjust the vacuum degree of the water passing chamber 31 after the water is closed. Thus, the reset stroke of the valve core 341 can be adjusted after the factory by the adjusting member 346, for example, when the user is not at home for a long time and does not need to use the shower, the reset stroke of the valve core 341 can be adjusted to the shortest, so that the amount of residual water sucked by the variable chamber 32 can be ignored, the vacuum degree of the water passing chamber 31 is low, and the residual water in the water passing chamber 31 will not accumulate in the water passing chamber 31, preventing the residual water from breeding bacteria for a long time in the water passing chamber 31.

[0045] Then to achieve the adjustment, in the embodiment, the fixed seat 343 forms the water passing chamber 31 with the face cover 12, the fixed seat 343 is provided with a mounting hole, and the valve core 341 is movably arranged in the mounting hole; the adjusting member 346 is a thread arranged between the side wall of the valve body 342 and the inner wall of the mounting hole; thus, the valve body 342 can be moved up and down along the axial direction in the fixed seat 343. The valve body 342 is provided with a water inlet 3421 and a sealing cooperation surface 3422, the water inlet 3421 is arranged on the side of the valve body 342 and is used for connecting the water passing chamber 31 and the water passing flow channel 33, and the sealing cooperation surface 3422 is arranged downstream of the water inlet 3421 along the water flow direction; when the water is closed, the valve core 341 is located at the first position so that the sealing member 3411 on the valve core 341 abuts against the sealing cooperation surface 3422, and the communication between the water inlet 3421 and the water passing chamber 31 is disconnected; when the water is passing, the valve core 341 is located at the second position so that the sealing member 3411 on the valve core 341 is away from the sealing cooperation surface 3422, and the communication between the water inlet 3421 and the water passing chamber 31 is opened.

[0046] To further facilitate the user to adjust the position of the valve body 342, the switch valve 34 further comprises an operating member 345, which is used to drive the valve body 342 to move relative to the mounting hole, so as to adjust the height difference between the sealing member 3411 on the valve core 341 and the sealing fitting surface 3422 when the valve core 341 is in the second position, which determines the stroke of the valve core 341 from the second position to the first position. In the embodiment, the operating member 345 is a T-shaped slot or a cross-shaped slot arranged on the end surface of the valve body 342 along the axial direction, which facilitates the user to rotate the valve body 342 with a screwdriver, thereby driving the valve body 342 to move up and down along the axial direction.

[0047] To enable the valve core 341 to automatically reset when the water is turned off, the switch valve 34 further comprises a first reset member, and the valve core 341 presses the first reset member 344 to accumulate elastic reset force when the water is turned on.

[0048] In the embodiment, the first reset member 344 and the second reset member 323 are reset springs respectively. Since there are a large number of water outlets 121 on the shower, it is not practical and unnecessary to provide a water passing cavity 31 for each water outlet 121. Therefore, the water outlets 121 can be divided into multiple regions, and a water passing cavity 31 is provided in each region, and each water passing cavity corresponds to a switch valve 34, and the water passing cavity 31 can simultaneously communicate with all the water outlets 121 in the region.

[0049] Further reference Figure 5 and Figure 6 In the inclined state of the top spray shower, the residual water in the top spray shower body 1 will collect in the lower part, so that the amount of residual water in the lower part is relatively large, and the gravity acting on the residual water in the lower part is also relatively large. Once the gravity acting on the residual water in the lower part is greater than the surface adsorption force between the water and the water outlet 21, the water cannot be turned off, i.e., stopped. Therefore, in order to solve this problem, either the surface adsorption force between the water outlet 21 and the residual water is increased, or the amount of residual water that can be collected in the lower part is reduced.

[0050] In the embodiment, the inner side of the face cover 12, i.e., the side facing the water outlet channel, has a bottom surface, and the first rib 122 and the second rib 123 are protruded on the bottom surface. The first rib 122 and the fixed seat 343 form a plurality of independent regions, and each independent region is provided as a water passing cavity 31. In this way, the residual water in different regions will not be collected together. For example Figure 6In this case, only 1 / 3H height of residual water will gather to the low place due to the inclination, and if the partition area, all residual water will gather to the low place. In this way, the amount of residual water in the low place can be greatly reduced, so as to reduce the gravity of the residual water in the low place, so as to ensure that the gravity of the residual water in the low place will not be greater than the surface adsorption force between the water outlet nozzle 21 and the residual water, so that the function of stopping when the top spray shower is tilted is still realized.

[0051] Further referring to Figure 7 , the second rib 123 is used to form a flow channel, so as to increase the adsorption force between the water and the second rib 123, so that the water is not easy to flow after the water is turned off, and the sealing of the water outlet nozzle 121 is ensured.

[0052] In addition, in Figure 8 , the face cover 12 and the fixed seat 343 have a height difference H', the upper end face of the water outlet nozzle 121 and the fixed seat have a gap S, and the water outlet nozzle 121 is arranged in an elongated shape, so as to increase the length-diameter ratio of the water outlet nozzle 121, so as to increase the pipe resistance, so that the residual water is not easy to flow after the water is turned off.

[0053] The above is only the preferred specific embodiment of the present application, but the design concept of the present application is not limited to this. Any person skilled in the art can make non-essential changes to the present application within the technical scope disclosed by the present application, and such changes shall be deemed to fall within the scope of protection of the present application.

Claims

1. A structure that stops water flow immediately upon shutting off, characterized in that... include: The system includes a water passage chamber, a variable chamber, a water flow channel, a water outlet, and a switching valve; the water passage chamber is located between the water outlet and the water flow channel. When water flows through, the switch valve is connected to the water passage by water pressure; when the water is turned off, the switch valve resets and disconnects the connection between the water passage and the water passage; when water flows through, the variable chamber generates negative pressure, causing the volume of the variable chamber to decrease; when the water is turned off, the negative pressure disappears and the volume of the variable chamber increases, so that when the water is turned off, the residual water in the water passage is drawn into the variable chamber through the water passage, and after the valve core of the switch valve disconnects the connection between the water passage and the water passage, a negative pressure is formed in the water passage. The switching valve also includes an adjusting component, which is used to adjust the stroke of the valve core when the water is turned off, thereby changing the volume of residual water drawn into the variable chamber in the water passage chamber, so as to adjust the vacuum degree of the water passage chamber after the water is turned off.

2. The structure for stopping water flow immediately upon shutting off, as described in claim 1, is characterized in that: The stroke in which the variable chamber expands in volume when the water is turned off is S1, and the stroke in which the valve core of the switching valve resets when the water is turned off is S2, wherein S1>S2.

3. The structure for stopping water flow immediately upon shutting off, as described in claim 1, is characterized in that: The water passage includes an acceleration passage whose cross-section decreases along the water flow direction, and the connection between the water passage and the variable chamber is located downstream of the acceleration passage along the water flow direction.

4. The structure that stops water flow immediately upon shutting off according to claim 1, characterized in that: The adjusting element is used to adjust the position of the valve body along the direction of movement of the valve core.

5. The structure for stopping water flow immediately upon shutting off, as described in claim 4, is characterized in that: It also includes a cover, which is connected to the fixed base to form the water passage cavity. The adjusting element is a thread provided on the side wall of the valve body and the inner wall of the mounting hole. The valve body is provided with an inlet for connecting the water passage cavity and the water flow channel. When the water is turned off, the valve core is in a first position so that the seal on the valve core disconnects the connection between the water inlet and the water passage cavity. When the water is turned on, the valve core is in a second position so that the seal on the valve core opens the connection between the water inlet and the water passage cavity.

6. The structure for stopping water flow immediately upon shutting off, as described in claim 5, is characterized in that: The valve core is provided with a sealing mating surface, and the switching valve also includes an operating element. The operating element is used to drive the valve body to move relative to the mounting hole, so as to adjust the height difference between the sealing element on the valve core and the sealing mating surface when the valve core is in the second position.

7. The structure for stopping water flow immediately upon shutting off, as described in claim 1, is characterized in that: The switching valve also includes a first reset element, and when water is supplied, the valve core squeezes the first reset element to accumulate elastic reset force.

8. The structure for stopping water flow immediately upon shutting off, as described in claim 1, is characterized in that: It also includes a cover, on which the water outlet is provided. The side of the cover facing the water passage is provided with multiple first ribs. The multiple first ribs and the fixed base enclose multiple independent areas. Each independent area is set as a water passage cavity, and each water passage cavity is provided with a corresponding switch valve.

9. A top-spray shower head, characterized in that... It includes the overhead shower head body and the structure that stops the water flow immediately upon turning off, as described in any one of claims 1-8.

10. A top-spray shower head according to claim 9, characterized in that: The overhead shower head body is provided with an installation cavity, and a piston is placed in the installation cavity to divide the installation cavity into the variable chamber and a chamber that communicates with the outside atmosphere; when water is flowing, the variable chamber forms a negative pressure so that the piston moves under the action of the outside atmosphere to reduce the volume of the variable chamber and squeeze the second reset member to accumulate elastic reset force.

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