Waterway switching device and shower head

Abstract

A waterway switching device, comprising fixed seats (100), valve diaphragms (220) and valve stems (300). The valve diaphragms are connected to the fixed seats to form pressure chambers (110) of a plurality of pilot valves (200), and each pressure chamber is in communication with a pressure relief channel (120); the valve stems correspond to the pressure chambers, and the valve stems can move and block or open the pressure relief channels of the corresponding pressure chambers by means of the movement; when the pressure relief channels of the pilot valves are opened, water in the pressure chambers of the pilot valves flows out through the opened pressure relief channels so as to release pressure from the pressure chambers, thereby opening the pilot valves; and when the pressure relief channels of the pilot valves are blocked, the pilot valves are closed. The waterway switching device can shorten the valve steam switching stroke, simplify the switching mode, and save a switching force of a user. Also disclosed is a shower head comprising the waterway switching device.

Description

Water circuit switching device and shower head Technical Field

[0001] This invention relates to the field of bathroom technology, and in particular to a water circuit switching device and a shower head. Background Technology

[0002] Existing showerheads suffer from problems such as excessively long valve shaft switching strokes, difficult user switching, and complex switching methods when switching water flow paths. Therefore, there is an urgent need for a water flow switching device and showerhead to solve these problems. Summary of the Invention

[0003] According to one aspect of the present invention, the object is to provide a water circuit switching device that can shorten the valve shaft switching stroke, simplify the switching method, and save the user's switching force when switching the outlet water circuit.

[0004] To achieve this objective, the present invention employs one of the following technical solutions: a waterway switching device, comprising:

[0005] A fixed base (100) and a valve diaphragm (220), wherein the valve diaphragm (220) is connected to the fixed base (100) to form N pressure chambers (110) of pilot valves (200), where N is a natural number and N≥2, and each pressure chamber (110) is connected to a pressure relief channel (120); and

[0006] There are N valve shafts (300), and each of the N valve shafts (300) corresponds to one of the N pressure chambers (110). Each valve shaft (300) is movable and can block or open the pressure relief channel (120) of the corresponding pressure chamber (110). When the pressure relief channel (120) of the pilot valve (200) is opened, the water in the pressure chamber (110) of the pilot valve (200) flows out through the opened pressure relief channel (120) to relieve the pressure in the pressure chamber (110), and the pilot valve (200) is opened. When the pressure relief channel (120) of the pilot valve (200) is blocked, the pilot valve (200) is closed.

[0007] The system includes a water distribution body (10) having an inlet end (13); a fixed base (100) is fixedly connected to the water distribution body (10) and a valve diaphragm (220) is disposed between the water distribution body (10) and the fixed base (100) to form the aforementioned N pilot valves (200), each pilot valve (200) having a main outlet channel (600), the pilot valve (200) being opened to connect the inlet end (13) and the main outlet channel (600), the pressure chamber (110) being connected to the inlet end (13), and the water in the pressure chamber (110) flowing out to the downstream channel through the pressure relief channel (120).

[0008] Also includes:

[0009] The transmission seat (400) and the drive mechanism (500) are connected to the transmission seat (400) so as to drive the transmission seat (400) to move. The movement of the transmission seat (400) drives at least one valve shaft (300) to move to open the corresponding pressure relief channel (120).

[0010] The transmission seat (400) is provided with a plurality of control slots (410) arranged circumferentially, and the valve shaft (300) is provided with a push elastic element (320). When the transmission seat (400) rotates to the point where the control slots (410) are directly opposite the valve shaft (300), the valve shaft (300) can move toward the transmission seat (400) under the pushing action of the push elastic element (320), so that the corresponding pressure relief channel (120) changes from blocked to open.

[0011] One end of the valve shaft (300) is abutted against a movable ball (310), and the other end is abutted against the aforementioned push elastic element (320). The valve shaft (300) is surrounded by a first sealing ring (330), which can be detachably sealed between the pressure relief channel (120) and the pressure chamber (110). When the transmission seat (400) rotates to the point where the control slot (410) is directly opposite the movable ball (310), the valve shaft (300) can move toward the transmission seat (400) under the pushing action of the push elastic element (320), causing the movable ball (310) to move into the control slot (410), thereby driving the first sealing ring (330) to move to connect the pressure relief channel (120) and the pressure chamber (110).

[0012] The fixed base (100) is connected to N valve shaft mounting posts (130). The valve shaft (300) is coaxially movably disposed within the valve shaft mounting posts (130). The pressure relief channel (120) is formed between the periphery of the valve shaft (300) and the inner wall of the valve shaft mounting post (130). The valve shaft (300) is surrounded by a first sealing ring (330). The first sealing ring (330) can be detachably sealed between the pressure relief channel (120) and the pressure chamber (110).

[0013] The valve shaft (300) is provided with a second sealing ring (340) and a third sealing ring (350) located on both sides of the first sealing ring (330), and the second sealing ring (340) and the third sealing ring (350) abut against the inner wall of the valve shaft mounting post (130).

[0014] Each fixed seat (100) is provided with a valve shaft mounting post (130) as described above on its side.

[0015] The drive mechanism (500) includes a ratchet seat (520), a button (510), and a slider (530). The button (510) is driven to the slider (530) so that the slider (530) can be moved by the button (510). The slider (530) is driven to the ratchet seat (520) so that the ratchet seat (520) can be rotated by the slider (530). The transmission seat (400) is provided with a first ratchet (420), and the ratchet seat (520) is provided with a second ratchet (521). The first ratchet (420) of the transmission seat (400) and the second ratchet (521) of the ratchet seat (520) mesh along the rotation axis so that the transmission seat (400) can be rotated in the forward direction by the ratchet seat (520).

[0016] The transmission seat (400) is mounted on the ratchet seat (520). The first ratchet (420) of the transmission seat (400) is arranged downwards, and the second ratchet (521) of the ratchet seat (520) is arranged upwards. The first ratchet (420) and the second ratchet (521) mesh vertically.

[0017] The ratchet seat (520) is also provided with a gear (522), and the sliding member (530) is provided with a rack (531), the gear (522) meshing with the rack (531).

[0018] The drive mechanism (500) further includes a reset elastic element (540) and a support elastic element (560), wherein the reset elastic element (540) abuts against the sliding member (530) and the support elastic element (560) abuts against the transmission seat (400);

[0019] The button (510) drives the slider (530) to slide forward, the reset elastic element (540) is compressed and stores energy, the slider (530) drives the ratchet seat (520) to rotate forward, and the ratchet seat (520) rotates forward, which drives the transmission seat (400) to rotate forward.

[0020] The reset elastic element (540) stores energy and releases the drive sliding member (530) to slide and reset in the opposite direction, driving the ratchet seat (520) to reset in the reverse direction. The transmission seat (400) moves along the rotation axis under the cooperation of the first ratchet (420) and the second ratchet (521), so that the first ratchet (420) and the second ratchet (521) engage and disengage and support the elastic element (560) to compress and store energy. After the ratchet seat (520) rotates to the next ratchet tooth, the energy stored in the support elastic element (560) is released to drive the transmission seat (400) to sit down and engage the ratchet seat (520).

[0021] The first ratchet of the first ratchet (420) is provided with a first inclined guide surface and a first vertical surface, and the second ratchet of the second ratchet (521) is provided with a second inclined guide surface and a second vertical surface; the ratchet seat (520) rotates forward and drives the transmission seat (400) to rotate forward by abutting the first vertical surface through the second vertical surface; the ratchet seat (520) reverses the first inclined guide surface to cooperate with the second inclined guide surface so that the first inclined guide surface can move along the second inclined guide surface; the first ratchet is disengaged or engaged with the second ratchet by the ratchet seat (520) rotating in reverse or forward.

[0022] The number of teeth of the second ratchet of the second ratchet (521) is a common factor of the number of teeth of the first ratchet of the first ratchet (420).

[0023] The common factor is greater than or equal to 2, and the second ratchet (521) further includes a smooth section, which is arranged alternately with the first ratchet tooth.

[0024] The drive mechanism (500) further includes a rocker arm (550), the button (510) is connected to the rocker arm (550) in a drive manner, the rocker arm (550) swings against the slider (530), the button (510) drives the rocker arm (550) to swing, and the rocker arm (550) swings to push the slider (530) to move.

[0025] N valve diaphragms (220) are provided, and the N valve diaphragms (220) are respectively connected to the fixed base (100) to form the pressure chambers (110) of the N pilot valves (200). The valve diaphragms (220) are provided with gaps (210), and the pressure chambers (110) are connected to the water inlet end (13) through the gaps (210). An opening and closing elastic element (700) is provided between the top of the fixed base (100) and the valve diaphragm (220). A drain rod (710) is provided on the opening and closing elastic element (700). The drain rod (710) can slide into the gap (210). When the valve diaphragm (220) moves toward the top of the fixed base (100) under the action of water pressure, the pilot valve (200) opens so that the water inlet end (13) is connected to the main outlet channel (600).

[0026] There are N fixed seats (100), and the N fixed seats (100) are arranged circumferentially on the water distribution body (10) with the transmission seat (400) as the center. The N valve shafts (300) are arranged circumferentially with the transmission seat (400) as the center. The transmission seat (400) can rotate to drive the valve shafts (300) to move in a cycle.

[0027] To achieve this objective, the present invention adopts the following second technical solution: a waterway switching device, comprising:

[0028] A fixed base (100) and a valve diaphragm (220), wherein the valve diaphragm (220) is connected to the fixed base (100) to form N pressure chambers (110) of pilot valves (200), where N is a natural number and N≥2, and each pressure chamber (110) is connected to a pressure relief channel (120); and

[0029] A valve shaft (300) is movably configured and can move to N positions. The N positions correspond one-to-one with the pressure relief channels (120) of the N pressure chambers (110). By moving the valve shaft (300) to a certain position, the corresponding pressure relief channel (120) is controlled to change from blocked to open. When the pressure relief channel (120) of the pilot valve (200) is opened, the water in the pressure chamber (110) of the pilot valve (200) flows out through the open pressure relief channel (120) to relieve pressure in the pressure chamber (110), and the pilot valve (200) is opened. When the pressure relief channel (120) of the pilot valve (200) is blocked, the pilot valve (200) is closed.

[0030] The system includes a water distribution body (10), a fixed seat (100) is fixedly connected to the water distribution body (10), and a valve diaphragm (220) is disposed between the water distribution body (10) and the fixed seat (100) to form the aforementioned N pilot valves (200).

[0031] Also includes:

[0032] The transmission base (400) and the drive mechanism (500) are connected to the transmission base (400) so as to drive the transmission base (400) to rotate. The rotation of the transmission base (400) controls the valve shaft (300) to move between N positions so that the corresponding pressure relief channel (120) changes from blocked to open.

[0033] The transmission seat (400) is provided with a plurality of control slots (410) arranged circumferentially, and there is a tooth (411) between each two adjacent control slots (410). The valve shaft (300) is provided with a push elastic element (320). When the transmission seat (400) rotates from the tooth (411) facing the valve shaft (300) to the control slot (410) facing the valve shaft (300), the valve shaft (300) can move toward the transmission seat (400) under the pushing action of the push elastic element (320), so that the corresponding pressure relief channel (120) changes from blocked to open.

[0034] The fixed base (100) is connected to a valve shaft mounting post (130). The valve shaft (300) is coaxially and movable within the valve shaft mounting post (130). A spacer sealing ring (361) is provided around the middle of the valve shaft (300). The spacer sealing ring (361) divides the annular cavity between the periphery of the valve shaft (300) and the inner wall of the valve shaft mounting post (130) into two pressure relief channels (120). The valve shaft (300) is also provided with two fourth sealing rings (362) located on both sides of the spacer sealing ring (361). The fourth sealing rings (362) can be detachably sealed between the pressure relief channel (120) and the pressure chamber (110).

[0035] The drive mechanism (500) includes a ratchet seat (520), a button (510), and a slider (530). The button (510) is driven to the slider (530) so that the slider (530) can be moved by the button (510). The slider (530) is driven to the ratchet seat (520) so that the ratchet seat (520) can be rotated by the slider (530). The transmission seat (400) is provided with a first ratchet (420), and the ratchet seat (520) is provided with a second ratchet (521). The first ratchet (420) of the transmission seat (400) and the second ratchet (521) of the ratchet seat (520) mesh along the rotation axis so that the transmission seat (400) can be rotated in the forward direction by the ratchet seat (520).

[0036] The transmission seat (400) is mounted on the ratchet seat (520). The first ratchet (420) of the transmission seat (400) is arranged downwards, and the second ratchet (521) of the ratchet seat (520) is arranged upwards. The first ratchet (420) and the second ratchet (521) mesh vertically. The ratchet seat (520) is also provided with a gear (522), and the sliding member (530) is provided with a rack (531). The gear (522) meshes with the rack (531).

[0037] The valve shaft (300) moves in a direction parallel to the sliding direction of the sliding member (530), and at least two of the pilot valves (200) are arranged to the left and right relative to the valve shaft (300) in the direction of movement.

[0038] To achieve this objective, the present invention adopts the following third technical solution: a shower head, including a water distribution body (10) and the aforementioned water path switching device, wherein the valve shaft (300) is movable relative to the water distribution body (10), the fixed seat (100) is fixedly connected to the water distribution body (10), and each pilot valve (200) has a main water outlet channel (600); the water distribution body (10) is provided with multiple partition structures (11), the partition structures (11) divide the water distribution body (10) into multiple water outlet spaces (12), and the pressure relief channel (120) of the pilot valve (200) and the main water outlet channel (600) are connected to the same water outlet space (12).

[0039] The shower head also includes a shower head body (50), a water distribution seat (20), a water nozzle (30), and a face cover (40). The water distribution body (10) is disposed inside the shower head body (50). The water distribution seat (20) is fixedly connected to the bottom of the water distribution body (10). The water nozzle (30) is fixedly connected to the bottom of the water distribution seat (20). The face cover (40) is fixedly connected to the bottom of the water nozzle (30). Water flowing out from the water distribution body (10) can pass through the water distribution seat (20), the water nozzle (30), and the face cover (40) in sequence before flowing out of the shower head.

[0040] The beneficial effects of this invention are:

[0041] The water circuit switching device provided by this invention includes a fixed base, a valve diaphragm, and multiple valve shafts. The valve diaphragm and the fixed base form multiple independent pilot valves to form multiple independent pressure chambers, each pressure chamber being connected to a pressure relief channel. Each valve shaft corresponds to a pressure chamber and can block or open the corresponding pressure relief channel. When the pressure relief channel is opened, the corresponding pressure chamber is depressurized, and the pilot valve opens to connect the inlet end with the corresponding main outlet channel; water in the pressure chamber can flow out to the downstream channel through the corresponding pressure relief channel. With the above configuration, the valve diaphragm can move under the water pressure difference between the cross-sectional area of ​​the fixed base corresponding to the opening of the pressure chamber and the cross-sectional area of ​​the corresponding main outlet channel, so that the pressure chamber and the corresponding main outlet channel are connected. At this time, water in the pressure chamber can flow out of the fixed base through the corresponding pressure relief channel and the corresponding main outlet channel. That is to say, after water enters the pressure chamber, the pilot valve can be opened with only a small flow rate by depressurization, so as to open the water circuit, shorten the valve shaft switching stroke, simplify the switching method, and save the user's switching force.

[0042] The water circuit switching device includes a fixed base, a valve diaphragm, and a valve shaft. The single valve shaft can slide between N positions. When the valve shaft is in a certain position, the corresponding pressure relief channel opens, the corresponding pressure chamber is depressurized, and the corresponding pilot valve opens. Switching is achieved by controlling different pilot valves to open at different positions. Firstly, only a small flow rate is needed to open the pilot valve, thus opening the outlet water circuit, shortening the valve shaft switching stroke, simplifying the switching method, and saving users switching force. Secondly, a single valve shaft controls multiple pilot valves, saving valve shafts and related components, reducing costs and space requirements. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0044] Figure 1 is an exploded view of the shower head provided in Embodiment 1;

[0045] Figure 2 is a schematic diagram of the water channel switching device provided in Embodiment 1 being assembled on the water distribution body;

[0046] Figure 3 is a schematic diagram of the side of the water distribution body away from the water path switching device provided in Embodiment 1;

[0047] Figure 4 is a partial exploded view of the waterway switching device provided in Embodiment 1;

[0048] Figure 5 is a top view of the waterway switching device provided in Embodiment 1;

[0049] Figure 6 is a cross-sectional view along direction AA in Figure 5;

[0050] Figure 7 is a magnified view of the structure marked C in Figure 6;

[0051] Figure 8 is a cross-sectional view along the BB direction in Figure 5;

[0052] Figure 9 is a magnified view of the structure marked D in Figure 8;

[0053] Figure 10 is a schematic diagram of the opening and closing elastic element provided in Embodiment 1;

[0054] Figure 11 is one of the exploded view diagrams of the shower head provided in Embodiment 2;

[0055] Figure 12 is the second exploded view of the shower head provided in Embodiment 2;

[0056] Figure 13 is one of the structural schematic diagrams of the waterway switching device provided in Embodiment 2 on the water distribution body;

[0057] Figure 14 is a second schematic diagram of the water path switching device provided in Embodiment 2 on the water distribution body;

[0058] Figure 15 is a cross-sectional view along the EE direction in Figure 14;

[0059] Figure 16 is an enlarged view of point F in Figure 15.

[0060] In the diagram: 10. Water distribution body; 11. Separation structure; 12. Water outlet space; 13. Water inlet end; 20. Water distribution seat; 30. Water nozzle; 40. Cover; 100. Fixing seat; 110. Pressure chamber; 120. Pressure relief channel; 130. Valve shaft mounting post; 131. Mounting post housing; 132. Mounting post inner core; 140. Water flow channel; 200. Pilot valve; 210. Clearance; 300. Valve shaft; 310. Moving ball; 320. Pushing elastic element; 330. First sealing ring. 340. Second sealing ring; 350. Third sealing ring; 400. Transmission seat; 410. Control slot; 420. First ratchet; 500. Drive mechanism; 510. Button; 520. Ratchet seat; 521. Second ratchet; 522. Gear; 530. Sliding element; 531. Rack; 532. Mounting post; 540. Reset elastic element; 550. Rocker arm; 560. Support elastic element; 600. Main water outlet channel; 700. Opening and closing elastic element; 710. Unblocking rod. Detailed Implementation

[0061] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0062] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0063] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0064] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0065] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0066] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connect," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0067] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0068] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0069] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0070] Example 1

[0071] Referring to Figures 1-3, this embodiment provides a water path switching device and a shower head.

[0072] This showerhead can provide multiple water flow modes, including shower water, concentrated water, and aerated water. It includes a water path switching device, which comprises a water distribution body 10. The water distribution body 10 is equipped with N partition structures 11 and a water inlet 13. The partition structures 11 divide the water distribution body 10 into multiple independent water outlet spaces 12. This water path switching device can switch the water flow path of the showerhead, i.e., allow water to flow from one of the multiple water outlet spaces 12.

[0073] The shower head also includes a water distribution base 20, a water nozzle 30, a faceplate 40, and a shower head body 50. The water distribution body 10 is fixedly connected inside the shower head body 50, the water distribution base 20 is fixedly connected to the bottom of the water distribution body 10, the water nozzle 30 is connected to the bottom of the water distribution base 20, and the faceplate 40 is connected to the bottom of the water nozzle 30. Water flowing out of the water distribution body 10 can pass through the water distribution base 20, the water nozzle 30, and the faceplate 40 in sequence before flowing out of the shower head.

[0074] Referring to Figures 2-8, the water circuit switching device also includes a transmission base 400, a drive mechanism 500, a fixed base 100, N valve diaphragms 220, and N valve shafts 300, where N is a natural number and N≥2. The fixed base 100 is fixedly connected to the water distribution body 10, and the N valve diaphragms 220 are arranged between the water distribution body 10 and the fixed base 100 to form N pilot valves 200. The N valve diaphragms 220 are respectively connected to the fixed base 100 to form pressure chambers 110 of the N pilot valves 200.

[0075] In this embodiment, there are N fixed seats 100, and each of the N fixed seats 100 corresponds one-to-one with a N valve diaphragm 220, so that each fixed seat 100 and the corresponding valve diaphragm 220 form a pressure chamber 110. That is, the pilot valve 200 includes a fixed seat 100, a valve diaphragm 220, a water flow channel 140, and a main water outlet channel 600. Each pressure chamber 110 is connected to a pressure relief channel 120, and the pressure chamber 110 is connected to the pressure relief channel 120 through the water flow channel 140. The corresponding pressure relief channels 120 and the main water outlet channel 600 are located in the same water outlet space 12 on the water distribution body 10. The pressure relief channel 120 of the pilot valve 200 is opened, and the pressure chamber 110 of the pilot valve 200 is depressurized, causing the pilot valve to open and connecting the inlet end 13 and the main outlet channel 600. The water in the pressure chamber 110 flows out through the pressure relief channel 120 to the downstream channel. The main outlet channel 600 and the downstream channel converge in a certain outlet space 12 and flow out of the shower head. This embodiment is illustrated using N fixed seats as an example. As needed, one fixed seat 100 can be set, and N valve diaphragms 220 can be respectively set in the fixed seat 100 to form N independent pressure chambers 110; or, one fixed seat 100 and one valve diaphragm 220 can be set, and one valve diaphragm 220 and one fixed seat 100 can cooperate to form N independent pressure chambers 110.

[0076] The N fixed seats 100 are circumferentially spaced on the water distribution body 10 with the transmission seat 400 as the center. The N fixed seats 100 and the valve diaphragm 220 form an independent pressure chamber 110. Multiple pilot valves are arranged in a ring rather than stacked, reducing the height and making the water outlet device structure compact. The pressure chamber 110 is connected to the water inlet 13 through the valve diaphragm 220. When the pilot valve 200 is opened, the water inlet 13 is connected to the main water outlet channel 600 through the opened pilot valve 200. That is, the water inlet 13 can selectively open a certain pilot valve 200 to select the main water outlet channel 600 connected to that pilot valve 200, so that water can be discharged from the water outlet space 12 corresponding to that pilot valve 200. When the pilot valve is closed, the water inlet 13 and the main water outlet channel 600 of the closed pilot valve 200 are blocked. When the pressure relief channel 120 of the pilot valve 200 is opened, the water in the pressure chamber 110 can flow out through the corresponding pressure relief channel 120, and the pressure chamber 110 can be depressurized. The valve diaphragm 220 moves under the action of water pressure, so that the pilot valve 200 opens, so that the water inlet 13 and the corresponding main water outlet channel 600 are connected. In the specific structure: Referring to Figure 9, the water distribution body 10 is provided with an inner ring wall 101 and an outer ring wall 102 surrounding the inner ring wall 101. The inner ring wall 101 and the outer ring wall 102 form an annular cavity 103 that connects to the water inlet 13. The main water outlet channel 600 includes the inner hole of the inner ring wall 101. The valve diaphragm 220 includes a thin film 221 and a movable seat 222 fixed in the middle of the thin film 221. The periphery of the thin film 221 is fixed to the outer ring wall 102 and the fixed seat. Between the valve diaphragm 220 and the fixed seat 100, the cavity between them constitutes the pressure chamber 110. The diaphragm 221 cooperates with the inner ring wall 101 to control the opening and closing of the pilot valve. When the pilot valve 200 is closed, the diaphragm 221 abuts against the end face of the inner ring wall 101 to block the annular cavity 103 and the main outlet channel 600. When the pilot valve 200 is opened, the diaphragm 221 moves upward to leave the end face of the inner ring wall 101, and the annular cavity 103 and the main outlet channel 600 are connected.

[0077] Each valve shaft 300 corresponds to a fixed seat 100 and can move relative to the fixed seat 100. The valve shaft 300 can move to block or open the corresponding pressure relief passage 120. The transmission seat 400 and the drive mechanism 500 are connected in a transmission manner. The transmission seat 400 is disposed between multiple fixed seats 100 (or above the fixed seats 100). That is, the multiple fixed seats 100 are circumferentially spaced outside the transmission seat 400. The transmission seat 400 can rotate to cyclically drive the multiple valve shafts 300 to move. The drive mechanism 500 is mounted on the water distribution body 10. It includes a button 510, which is slidably mounted on the shower head, specifically in an extension portion of the water distribution body 10 that extends into the handle (the handle portion of the shower head has an opening through which the button 510 passes). Pressing down on the button 510 rotates the transmission seat 400, thereby selectively moving at least one valve shaft 300 to open at least one pressure relief channel 120 and at least one pilot valve 200, thus selecting between shower water, concentrated water, or aerated water. Alternatively, both valve shafts 300 can be moved simultaneously to open both pressure relief channels 120 and both pilot valves, achieving a mixed output of shower water, concentrated water, or aerated water. With this configuration, pressing down on the button 510 drives the transmission seat 400 to rotate, which in turn drives the valve shaft 300 to move and open the pilot valve.

[0078] Referring to Figures 2 and 5-7, each fixed base 100 is fixedly provided with a valve shaft mounting post 130, such as fixed to the side of the fixed base 100. The valve shaft mounting post 130 includes a mounting post outer shell 131 and a mounting post inner core 132 coaxially sleeved. The mounting post outer shell 131 is fixed to the fixed base 100, such as fixed to the side of the fixed base 100. The mounting post outer shell 131 and the fixed base 100 can be different components connected together, or they can be integrally formed. The mounting post inner core 132 is coaxially fixedly disposed within the mounting post outer shell 131. The valve shaft 300 is coaxially slidably disposed within the mounting post inner core 132. The pressure relief channel 120 is formed between the periphery of the valve shaft 300 and the inner wall of the mounting post inner core 132. The water flow channel 140 is disposed at the connection between the fixed base 100 and the valve shaft mounting post 130, and can connect the pressure relief channel 120 and the pressure chamber 110. The valve shaft mounting post 130 is provided with an inlet 1301 and an outlet 1302. The inlet and outlet are slidably spaced along the valve shaft 300, and a pressure relief channel 120 is connected between the inlet and outlet. The inlet connects to the water flow channel 140, and the outlet connects to the downstream flow channel. Specifically, the mounting post housing 131 includes a first small-diameter section and a first large-diameter section, forming a stepped surface between them. The mounting post inner core 132 is fixedly installed within the first large-diameter section. The inner end face of the mounting post inner core 132 and the stepped surface are spaced apart. The inner hole of the mounting post inner core 132 corresponds to the inner hole of the first small-diameter section, such as being of equal or nearly equal diameter. The inlet is located in the first large-diameter section at the interval. The outlet penetrates both the mounting post inner core 132 and the first large-diameter section. The pressure relief channel 120 is an annular cavity between the mounting post inner core 132 and the valve shaft 300. By arranging the valve shaft around the transmission seat rather than stacking it vertically, the structure is thin and compact.

[0079] Referring to Figures 8 and 9, the pilot valve 200 has a gap 210. The pressure chamber 110 is connected to the water inlet 13 through the gap 210, allowing water from the water inlet 13 to enter the pressure chamber 110 through the gap 210. Specifically, the gap passes through the diaphragm 221 and the movable seat 222, with the lower end of the gap connected to the annular cavity 103 and the upper end connected to the pressure chamber 110. Since the water inflow through the gap 210 is less than the water outflow through the pressure relief channel 120, the movement stroke of the valve shaft 300 is shorter, thus shortening the switching stroke of the valve shaft 300.

[0080] Referring to Figure 9, an opening and closing elastic element 700 is provided between the inner top of the fixed base 100 and the pilot valve 200. The opening and closing elastic element 700 can push downward against the pilot valve 200. When the water in the pressure chamber 110 flows to the downstream flow channel through the corresponding pressure relief channel 120 to flow out of the fixed base 100, the pressure in the pressure chamber 110 is less than the pressure at the inlet end 13. Under the action of the water pressure difference between the cross-sectional area S1 at the inlet end 13 and the cross-sectional area S2 of the corresponding main outlet channel 600, the pilot valve 200 can move towards the inner top of the fixed base 100, that is, move upward, compress the opening and closing elastic element 700, so as to open the pilot valve, so that the inlet end 13 (annular cavity 103) and the corresponding main outlet channel 600 are connected, and water is discharged from the main outlet channel 600. That is, after water enters the pressure chamber 110, the pilot valve 200 can be opened by the pressure chamber 110 depressurization method, relying only on a small water pressure, so as to open the water outlet path.

[0081] Referring to Figures 9 and 10, the opening and closing elastic element 700 includes a spiral segment and an integrally formed unblocking rod 710 fixed to one end of the spiral segment and arranged along the extension and contraction direction. The unblocking rod 710 can slide within the gap 210, and the unblocking rod 710 can slide relative to the gap when the spiral segment is compressed. By integrating the unblocking rod 710 into the opening and closing elastic element 700, scale or impurities in the gap 210 can be removed during each compression and recovery process of the opening and closing elastic element 700, preventing blockage, and also providing positioning for the opening and closing elastic element 700.

[0082] Referring to Figures 2 and 4-7, the transmission seat 400 has multiple circumferentially spaced control slots 410, with a protruding tooth 411 between each pair of control slots 410. One end of the valve shaft 300 abuts against a movable ball 310, and the other end has a pushing elastic element 320. The valve shaft 300 is surrounded by a first sealing ring 330, which is positioned corresponding to the inlet and pressure relief channel. For example, it is located in the gap between the inner end face of the mounting column core 132 and the stepped surface of the mounting column housing 131. It can detachably abut against the inner end face of the mounting column core 132. Abutting against the inner end face seals the pressure relief channel 120 and the pressure chamber 110, thus cutting off the water flow channel 140. Not abutting opens the channel. The inner end face of the mounting column core 132 can be beveled as needed to improve sealing performance. When the transmission seat 400 rotates to the position where any control slot 410 is directly opposite the movable ball 310, the valve shaft 300 can move in the direction of the transmission seat 400 under the pushing action of the elastic element 320. The movable ball 310 can be pushed into the control slot 410 to drive the first sealing ring 330 to move from being blocked on the inner end face of the mounting column core 132 to not being in contact (the inner end face of the mounting column core 132 and the first sealing ring 330 are spaced apart) to open the pressure relief channel.

[0083] The valve shaft 300 is provided with a second sealing ring 340 and a third sealing ring 350 located on both sides of the first sealing ring 330. The second sealing ring 340 and the third sealing ring 350 abut against the inner wall of the inner core 132 of the mounting post and the inner wall of the first small-diameter section of the outer shell 131 of the mounting post, respectively. Both the second sealing ring 340 and the third sealing ring 350 are Y-shaped sealing rings. (1) When the pressure relief channel 120 is closed, the first sealing ring 330 and the third sealing ring 350 are subjected to the water pressure at the inlet (the inner end face of the mounting column core 132 and the first sealing ring 330 abut against each other). The water pressure areas of the first sealing ring 330 and the third sealing ring 350 are equal, and the water pressures of the two are equal. The valve shaft 300 can be in a water pressure balance state in the axial direction, saving the user's switching force. When the transmission seat 400 rotates from the valve shaft 300 facing the convex tooth 411 to facing the control slot 410, the valve shaft 300 is subjected to the elastic force of the pushing elastic element 320 to move towards the transmission seat 400. The elastic force needs to overcome the sliding friction of the valve shaft 300, so that the valve shaft 300 can move to open the pressure relief channel 120. The pressure relief channel 120 is connected to the pressure chamber 110 through the water flow channel 140. The pressure chamber 110 is depressurized, and the pilot valve is opened. (2) The pressure relief channel 120 is in the open state. The pressure relief channel 120 is connected to the pressure chamber 110 through the water flow channel 140. Since the area of ​​the second sealing ring 340 abutting against the inner wall of the mounting column core 132 and the area of ​​the third sealing ring 350 abutting against the inner wall of the first small diameter section of the mounting column shell are equal, the valve shaft 300 can be in a water pressure balance state in the axial direction, saving the user's switching force. When the transmission seat 400 rotates from the valve shaft 300 facing the control slot 410 to facing the convex tooth 411, the convex tooth 411 acts on the valve shaft 300. 0 drives the valve shaft 300 to move in the opposite direction, compressing and pushing the elastic element 320. The driving force of the transmission seat 400 overcomes the elastic force and the sliding friction of the valve shaft 300, causing the valve shaft 300 to move, thereby closing the pressure relief channel 120 and disconnecting the connection between the pressure relief channel 120 and the pressure chamber 110. At this time, the corresponding pilot valve 200 moves downward under the water pressure of the opening and closing elastic element 700 and the cross-sectional area S2 of the corresponding main outlet channel 600, and the pilot valve 200 closes, thereby disconnecting the connection between the main outlet channel 600 and the inlet end 13.

[0084] The drive mechanism 500 includes a ratchet seat 520 and a slider 530. The transmission seat 400 is provided with a downward-facing first ratchet 420, and the ratchet seat 520 is provided with an upward-facing second ratchet 521. The transmission seat 400 is mounted on the ratchet seat 520, and the first ratchet 420 is engaged with the second ratchet 521. The clockwise rotation of the ratchet seat 520 can drive the transmission seat 400 to rotate clockwise. In this embodiment, the clockwise rotation is either clockwise or counterclockwise. If the clockwise rotation is clockwise, the reverse rotation is counterclockwise, and vice versa. The ratchet seat 520 is also provided with a gear 522, and the slider 530 is provided with a rack 531. The gear 522 meshes with the rack 531, and the slider 530 is connected to the button 510. When the button 510 is pressed down, it can drive the slider 530 to move forward. For example, if it moves forward towards the ratchet seat 520, it can drive the ratchet seat 520 to rotate forward to achieve switching. Forward and reverse movement only indicate that the two movements are opposite, and do not limit forward movement to forward. It can be forward or backward.

[0085] The drive mechanism 500 also includes a reset elastic element 540 and a support elastic element 560. The sliding member 530 is provided with a mounting post 532 in the parallel movement direction, and the reset elastic element 540 is sleeved on the mounting post 532 and abuts against the side of the water distribution body 10. When button 510 is pressed, slider 530 moves forward, driving ratchet seat 520 to rotate forward via rack 531 and gear 522, which in turn drives transmission seat 400 to rotate forward (e.g., by a ratchet angle) to achieve switching. Reset elastic element 540 is compressed and stores energy. When pressure is released from button 510, reset elastic element 540 releases its stored energy to reset, driving slider 530 to move in the opposite direction to reset. Through rack 531 and gear 522, ratchet seat 520 is reversed to reset, driving second ratchet 521 to reverse. Transmission seat 400 moves upward with the engagement of first ratchet 420 and second ratchet 521. This movement may include both movement and rotation, disengaging first ratchet 420 from second ratchet 521. First ratchet 420 and second ratchet 521 engage to achieve forward rotation, driving transmission seat 400 to rotate synchronously forward; reverse rotation disengages the engagement. During the reverse reset of the ratchet seat 520, the transmission seat 400 will not rotate under the action of the movable ball 310 and will remain in the switched position. Therefore, there is no need to set a pawl to restrict the reverse rotation of the transmission seat. The support elastic element 560 is abutted between the transmission seat 400 and the water distribution body 10. The support elastic element 560 can compress and store energy when the first ratchet 420 disengages from the second ratchet 521. After the transmission seat 400 remains in the switched position and the ratchet seat 520 rotates in the opposite direction relative to the transmission seat 400 to the next tooth position of the second ratchet 521 (i.e., the next second ratchet tooth), the energy stored in the support elastic element 560 is released to drive the transmission seat 400 to sit down and engage with the ratchet seat 520.

[0086] Referring to Figures 1 and 4, the first ratchet of the first ratchet 420 has a first inclined guide surface and a first vertical surface, and the second ratchet of the second ratchet 521 has a second inclined guide surface and a second vertical surface. When the ratchet seat 520 rotates forward, the second vertical surface abuts against the first vertical surface to drive the transmission seat 400 to rotate forward. When the ratchet seat 520 rotates backward, the first inclined guide surface engages with the second inclined guide surface to allow the first inclined guide surface to move along the second inclined guide surface. The rotation of the ratchet seat 520 controls the disengagement or engagement of the first ratchet with the second ratchet. The number of teeth on the second ratchet of the second ratchet 521 is a common factor of the number of teeth on the first ratchet of the first ratchet 420. In this embodiment, the common factor is greater than or equal to 2. The second ratchet 521 also includes a smooth section, which is arranged alternately with the first ratchet.

[0087] The drive mechanism 500 also includes a swing arm 550 oscillatingly connected to the water distribution body 10. The button 510 is driven to the swing arm 550, and the swing arm 550 is driven to the slider 530. Specifically, the swing arm 550 has a rotating part and two abutting parts. The rotating part is rotatably connected to the water distribution body. One abutting part can abut the button 510, and the other abutting part can abut the slider 530. When the button 510 is pressed down, it can push the swing arm 550 to swing, and the swing arm 550 pushes the slider 530 to move in the forward direction.

[0088] Pressing button 510 causes the rocker arm 550 to rotate counterclockwise. Simultaneously, the rocker arm 550 pushes the slider 530 to overcome the elastic force of the reset elastic element 540 and move it to the left. The reset elastic element 540 stores energy under pressure, which, through the engagement of the rack 531 of the slider 530 and the gear 522 of the ratchet seat 520, drives the ratchet seat 520 to rotate counterclockwise. Because the ratchet seat 520 and the transmission seat 400 are connected via the second ratchet 521 and the first ratchet 420, the slider 530 can drive the ratchet seat 520 to rotate counterclockwise. 0 and the transmission seat 400 rotate counterclockwise by a ratchet angle, so that "the movable ball 310 of one valve shaft 300 is located in a control slot 410 of the transmission seat 400" changes to "the other valve shaft 300 is facing the other control slot 410, and is pushed by the push elastic element 320 to drive the other valve shaft 300 to move and drive the movable ball 310 of the other valve shaft 300 to be located in the other control slot 410". At this time, the other control slot 410 of the transmission seat 400 is kept in the switched position under the action of the movable ball 310. After the pressure applied to button 510 is removed, the slider 530 resets under the action of the reset elastic element 540. Due to the engagement of rack 531 and gear 522, the slider 530 can drive the ratchet seat 520 to rotate clockwise during the reset process. During the clockwise rotation of the ratchet seat 520, the engagement of the second ratchet 521 and the first ratchet 420 causes the transmission seat 400 to move upward against the support elastic element 560 to disengage (unengage). After the ratchet seat 520 rotates in the opposite direction by one ratchet angle, the transmission seat 400 moves downward to the next switching initial position (the next second ratchet) under the action of the support elastic element 560. Each time button 510 is pressed, the transmission seat 400 rotates once, and the control slots 410 of the transmission seat 400 can sequentially align with the movable balls 310 of multiple valve shafts 300 to realize the sequential opening and closing of multiple water flow channels 140.

[0089] In this embodiment, three water outlet paths can be switched. The water distribution body 10 is equipped with three fixed seats 100, corresponding to three pilot valves 200 and three valve shafts 300. To achieve short-stroke switching, the transmission seat 400 rotates 15 degrees each time. The number of teeth of the first ratchet 420 is 360 / 15 = 24. The number of teeth of the second ratchet 521 of the ratchet seat 520 only needs to be a common factor of 24 (excluding 1). In this embodiment, the number of ratchet teeth of the second ratchet 521 is 12, and the number of control slots 410 of the ratchet seat 520 is 360 / (15×3) = 8.

[0090] In this embodiment, each pilot valve can be a single pilot valve or multiple pilot valves. If it is multiple pilot valves, the pressure chambers of the multiple pilot valves are connected to a common pressure relief channel.

[0091] Example 2

[0092] The difference between this embodiment and Embodiment 1 is as follows: Referring to Figures 11-16, this showerhead can have two water outlet modes. The water distribution body 10 is provided with two partition structures 11 and an inlet end 13. The partition structures 11 divide the water distribution body 10 into two independent water outlet spaces 12. Two valve diaphragms 220 are connected to a fixed base 100 to form pressure chambers 110 of two pilot valves 200. Each pilot valve 200 controls one water outlet mode. In this embodiment, the fixed bases of the two valve diaphragms 220 are integrally formed. The water circuit switching device includes a valve shaft 300, which is movably configured and can move to two positions. The two positions correspond one-to-one with the pressure relief channels 120 of the two pressure chambers 110. By moving the valve shaft 300 to a certain position, the corresponding pressure relief channel 120 is controlled to change from blocked to open, reducing the number of parts and resulting in a compact structure. For example: (1) When the valve shaft 300 moves to the first position, the second pressure relief channel opens, the second pressure chamber flows out through the second pressure relief channel to relieve pressure, the second pilot valve opens, the second water outlet space is in the first water outlet mode, at this time the first pressure relief channel is blocked, and the first pilot valve is closed; (2) When the valve shaft 300 moves to the second position, the first pressure relief channel opens, the first pressure chamber flows out through the first pressure relief channel to relieve pressure, the first pilot valve opens, the first water outlet space is in the first water outlet mode, at this time the second pressure relief channel is blocked, and the second pilot valve is closed.

[0093] In this embodiment, the transmission connection between the valve shaft 300 and the transmission seat 400 is as described in Embodiment 1; (1) When the movable ball 310 of the valve shaft 300 is facing the control slot 410 of the transmission seat 400, the valve shaft 300 moves toward the direction of the transmission seat 400 under the pushing action of the pushing elastic element 320, and the movable ball 310 is pushed into the control slot 410. At this time, the valve shaft 300 is in the first position, the second pressure relief channel is depressurized, and the second pilot valve is opened; (2) The transmission seat 400 rotates one ratchet angle, and under the action of the convex tooth 411, it drives the valve shaft 300 to move away from the direction of the transmission seat 400, pushes the elastic element 320 to compress and store energy, and the movable ball 310 is disengaged from the control slot 410 and faces the convex tooth 411. At this time, the valve shaft 300 is in the second position, the first pressure relief channel is depressurized, and the first pilot valve is opened. An additional pawl 401 is provided. The transmission seat 400 is externally provided with a third ratchet 402. One end of the pawl 401 is connected to the water divider 10, and the other end abuts against the third ratchet tooth 4021 of the third ratchet 402 to restrict the transmission seat 400 from reversing.

[0094] A valve shaft mounting post 130 is fixedly connected to one side of the fixed base 100, and the valve shaft 300 is coaxially movably disposed within the valve shaft mounting post 130. The valve shaft mounting post 130, the valve shaft 300, the valve shaft 300, and the sliding member 530 are arranged in parallel along their length, length, and direction of movement. The two pilot valves 200 are arranged on both sides of the valve shaft 300 along its direction of movement. This layout makes the water circuit switching device compact. Depending on the needs, the fixed base and the valve shaft mounting post 130 can be integrally formed to improve assembly efficiency and accuracy, or they can be two parts connected together.

[0095] The valve shaft mounting post 130 includes a second small diameter section and two second large diameter sections located on both sides of the second small diameter section. The second small diameter section connects to the two second large diameter sections, forming a stepped surface between each second small diameter section and the second large diameter section. The two second large diameter sections connect to two pressure chambers 110, and each pressure chamber 110 and each second large diameter section are connected through a water flow channel 140. The valve shaft 300 includes a valve stem 363, a first end seat 364, and a second end seat 365. The first end seat 364 and the second end seat 365 are fixedly connected to both ends of the valve stem 363. The push elastic element 320 abuts against the first end seat 364. A groove is provided in front of the second end seat 365, and a movable ball is movably disposed in the groove. The valve stem 363 has a protruding ring in the middle, and a spacer sealing ring 361 is provided on the ring. The spacer sealing ring 361 is adapted to connect to the second small diameter section, dividing the second small diameter section into two pressure relief channels 120. The pressure relief channel 120 has an outlet connecting to the downstream channel. The first end seat 364 and the second end seat 365 are both surrounded by a fourth sealing ring 362. The fourth sealing ring 362 of the first end seat 364 and the second end seat 365 are located on both sides of the spacer sealing ring 361. The sealing ring 362 controls whether it abuts against the stepped surface to block or open. Blocking blocks the pressure chamber 110 and pressure relief. When channel 120 is opened, it connects pressure chamber 110 and pressure relief channel 120. In the specific structure: when valve shaft 300 is in the first position, the fourth sealing ring 362 of the first end seat 364 abuts against the first step surface to block the first pressure relief channel there. At this time, the fourth sealing ring 362 of the second end seat 365 is spaced apart from the second step surface to open the second pressure relief channel there. When valve shaft 300 is in the second position, the fourth sealing ring 362 of the second end seat 365 abuts against the second step surface to block the second pressure relief channel there. At this time, the fourth sealing ring 362 of the first end seat 364 is spaced apart from the first step surface to open the first pressure relief channel there.

[0096] In this embodiment, each pilot valve can be a single pilot valve or multiple pilot valves. If it is multiple pilot valves, the pressure chambers of the multiple pilot valves are connected to a common pressure relief channel.

[0097] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention. Industrial applicability

[0098] The water circuit switching device of the present invention has a valve diaphragm and a fixed base forming multiple independent pilot valve pressure chambers. The pressure chambers are connected to the pressure relief channel. The valve shaft corresponds to each pressure chamber. The pilot valve can be opened to open the water circuit with only a small flow rate, which shortens the valve shaft switching stroke, simplifies the switching method, and saves the user switching force.

Claims

1. A waterway switching device, characterized in that: include: A fixed base (100) and a valve diaphragm (220), wherein the valve diaphragm (220) is connected to the fixed base (100) to form N pressure chambers (110) of pilot valves (200), where N is a natural number and N≥2, and each pressure chamber (110) is connected to a pressure relief channel (120); and There are N valve shafts (300), and each of the N valve shafts (300) corresponds to one of the N pressure chambers (110). Each valve shaft (300) is movable and can block or open the pressure relief channel (120) of the corresponding pressure chamber (110). When the pressure relief channel (120) of the pilot valve (200) is opened, the water in the pressure chamber (110) of the pilot valve (200) flows out through the opened pressure relief channel (120) to relieve the pressure in the pressure chamber (110), and the pilot valve (200) is opened. When the pressure relief channel (120) of the pilot valve (200) is blocked, the pilot valve (200) is closed.

2. The waterway switching device according to claim 1, characterized in that: The system includes a water distribution body (10) having an inlet end (13); a fixed base (100) is fixedly connected to the water distribution body (10) and a valve diaphragm (220) is disposed between the water distribution body (10) and the fixed base (100) to form the aforementioned N pilot valves (200), each pilot valve (200) having a main outlet channel (600), the pilot valve (200) being opened to connect the inlet end (13) and the main outlet channel (600), the pressure chamber (110) being connected to the inlet end (13), and the water in the pressure chamber (110) flowing out to the downstream channel through the pressure relief channel (120).

3. The waterway switching device according to claim 1, characterized in that: Also includes: The transmission seat (400) and the drive mechanism (500) are connected to the transmission seat (400) so as to drive the transmission seat (400) to move. The movement of the transmission seat (400) drives at least one valve shaft (300) to move to open the corresponding pressure relief channel (120).

4. The waterway switching device according to claim 3, characterized in that: The transmission seat (400) is provided with a plurality of control slots (410) arranged circumferentially, and the valve shaft (300) is provided with a push elastic element (320). When the transmission seat (400) rotates to the point where the control slots (410) are directly opposite the valve shaft (300), the valve shaft (300) can move toward the transmission seat (400) under the pushing action of the push elastic element (320), so that the corresponding pressure relief channel (120) changes from blocked to open.

5. The waterway switching device according to claim 4, characterized in that: One end of the valve shaft (300) is abutted against a movable ball (310), and the other end is abutted against the aforementioned push elastic element (320). The valve shaft (300) is surrounded by a first sealing ring (330), which can be detachably sealed between the pressure relief channel (120) and the pressure chamber (110). When the transmission seat (400) rotates to the point where the control slot (410) is directly opposite the movable ball (310), the valve shaft (300) can move toward the transmission seat (400) under the pushing action of the push elastic element (320), causing the movable ball (310) to move into the control slot (410), thereby driving the first sealing ring (330) to move to connect the pressure relief channel (120) and the pressure chamber (110).

6. The waterway switching device according to claim 1, characterized in that: The fixed base (100) is connected to N valve shaft mounting posts (130). The valve shaft (300) is coaxially movably disposed within the valve shaft mounting posts (130). The pressure relief channel (120) is formed between the periphery of the valve shaft (300) and the inner wall of the valve shaft mounting post (130). The valve shaft (300) is surrounded by a first sealing ring (330). The first sealing ring (330) can be detachably sealed between the pressure relief channel (120) and the pressure chamber (110).

7. The waterway switching device according to claim 6, characterized in that: The valve shaft (300) is provided with a second sealing ring (340) and a third sealing ring (350) located on both sides of the first sealing ring (330), and the second sealing ring (340) and the third sealing ring (350) abut against the inner wall of the valve shaft mounting post (130).

8. The waterway switching device according to claim 6, characterized in that: Each fixed seat (100) is provided with a valve shaft mounting post (130) as described above on its side.

9. The waterway switching device according to claim 3, characterized in that: The drive mechanism (500) includes a ratchet seat (520), a button (510), and a slider (530). The button (510) is driven to the slider (530) so that the slider (530) can be moved by the button (510). The slider (530) is driven to the ratchet seat (520) so that the ratchet seat (520) can be rotated by the slider (530). The transmission seat (400) is provided with a first ratchet (420), and the ratchet seat (520) is provided with a second ratchet (521). The first ratchet (420) of the transmission seat (400) and the second ratchet (521) of the ratchet seat (520) mesh along the rotation axis so that the transmission seat (400) can be rotated in the forward direction by the ratchet seat (520).

10. The waterway switching device according to claim 9, characterized in that: The transmission seat (400) is mounted on the ratchet seat (520). The first ratchet (420) of the transmission seat (400) is arranged downwards, and the second ratchet (521) of the ratchet seat (520) is arranged upwards. The first ratchet (420) and the second ratchet (521) mesh vertically.

11. The waterway switching device according to claim 9, characterized in that: The ratchet seat (520) is also provided with a gear (522), and the sliding member (530) is provided with a rack (531), the gear (522) meshing with the rack (531).

12. The waterway switching device according to claim 9, characterized in that: The drive mechanism (500) further includes a reset elastic element (540) and a support elastic element (560), wherein the reset elastic element (540) abuts against the sliding member (530) and the support elastic element (560) abuts against the transmission seat (400); The button (510) drives the slider (530) to slide forward, the reset elastic element (540) is compressed and stores energy, the slider (530) drives the ratchet seat (520) to rotate forward, and the ratchet seat (520) rotates forward, which drives the transmission seat (400) to rotate forward. The reset elastic element (540) stores energy and releases the drive sliding member (530) to slide and reset in the opposite direction, driving the ratchet seat (520) to reset in the reverse direction. The transmission seat (400) moves along the rotation axis under the cooperation of the first ratchet (420) and the second ratchet (521), so that the first ratchet (420) and the second ratchet (521) engage and disengage and support the elastic element (560) to compress and store energy. After the ratchet seat (520) rotates to the next ratchet tooth, the energy stored in the support elastic element (560) is released to drive the transmission seat (400) to sit down and engage the ratchet seat (520).

13. The waterway switching device according to claim 9, characterized in that: The first ratchet of the first ratchet (420) is provided with a first inclined guide surface and a first vertical surface, and the second ratchet of the second ratchet (521) is provided with a second inclined guide surface and a second vertical surface; the ratchet seat (520) rotates forward and drives the transmission seat (400) to rotate forward by abutting the first vertical surface through the second vertical surface; the ratchet seat (520) reverses the first inclined guide surface to cooperate with the second inclined guide surface so that the first inclined guide surface can move along the second inclined guide surface; the first ratchet is disengaged or engaged with the second ratchet by the ratchet seat (520) rotating in reverse or forward.

14. The waterway switching device according to claim 9, characterized in that: The number of teeth of the second ratchet of the second ratchet (521) is a common factor of the number of teeth of the first ratchet of the first ratchet (420).

15. The waterway switching device according to claim 14, characterized in that: The common factor is greater than or equal to 2, and the second ratchet (521) further includes a smooth section, which is arranged alternately with the first ratchet tooth.

16. The waterway switching device according to claim 9, characterized in that: The drive mechanism (500) further includes a rocker arm (550), the button (510) is connected to the rocker arm (550) in a drive manner, the rocker arm (550) swings against the slider (530), the button (510) drives the rocker arm (550) to swing, and the rocker arm (550) swings to push the slider (530) to move.

17. The waterway switching device according to claim 2, characterized in that: N valve diaphragms (220) are provided, and the N valve diaphragms (220) are respectively connected to the fixed base (100) to form the pressure chambers (110) of the N pilot valves (200). The valve diaphragms (220) are provided with gaps (210), and the pressure chambers (110) are connected to the water inlet end (13) through the gaps (210). An opening and closing elastic element (700) is provided between the top of the fixed base (100) and the valve diaphragm (220). A drain rod (710) is provided on the opening and closing elastic element (700). The drain rod (710) can slide into the gap (210). When the valve diaphragm (220) moves toward the top of the fixed base (100) under the action of water pressure, the pilot valve (200) opens so that the water inlet end (13) is connected to the main outlet channel (600).

18. The waterway switching device according to claim 3, characterized in that: There are N fixed seats (100), and the N fixed seats (100) are arranged circumferentially on the water distribution body (10) with the transmission seat (400) as the center. The N valve shafts (300) are arranged circumferentially with the transmission seat (400) as the center. The transmission seat (400) can rotate to drive the valve shafts (300) to move in a cycle.

19. A waterway switching device, characterized in that: include: A fixed base (100) and a valve diaphragm (220), wherein the valve diaphragm (220) is connected to the fixed base (100) to form N pressure chambers (110) of pilot valves (200), where N is a natural number and N≥2, and each pressure chamber (110) is connected to a pressure relief channel (120); and A valve shaft (300) is movably configured and can move to N positions. The N positions correspond one-to-one with the pressure relief channels (120) of the N pressure chambers (110). By moving the valve shaft (300) to a certain position, the corresponding pressure relief channel (120) is controlled to change from blocked to open. When the pressure relief channel (120) of the pilot valve (200) is opened, the water in the pressure chamber (110) of the pilot valve (200) flows out through the open pressure relief channel (120) to relieve pressure in the pressure chamber (110), and the pilot valve (200) is opened. When the pressure relief channel (120) of the pilot valve (200) is blocked, the pilot valve (200) is closed.

20. The waterway switching device according to claim 19, characterized in that: The system includes a water distribution body (10), a fixed seat (100) is fixedly connected to the water distribution body (10), and a valve diaphragm (220) is disposed between the water distribution body (10) and the fixed seat (100) to form the aforementioned N pilot valves (200).

21. The waterway switching device according to claim 20, characterized in that: Also includes: The transmission base (400) and the drive mechanism (500) are connected to the transmission base (400) so as to drive the transmission base (400) to rotate. The rotation of the transmission base (400) controls the valve shaft (300) to move between N positions so that the corresponding pressure relief channel (120) changes from blocked to open.

22. The waterway switching device according to claim 21, characterized in that: The transmission seat (400) is provided with a plurality of control slots (410) arranged circumferentially, and there is a tooth (411) between each two adjacent control slots (410). The valve shaft (300) is provided with a push elastic element (320). When the transmission seat (400) rotates from the tooth (411) facing the valve shaft (300) to the control slot (410) facing the valve shaft (300), the valve shaft (300) can move toward the transmission seat (400) under the pushing action of the push elastic element (320), so that the corresponding pressure relief channel (120) changes from blocked to open.

23. The waterway switching device according to claim 20, characterized in that: The fixed base (100) is connected to a valve shaft mounting post (130). The valve shaft (300) is coaxially and movable within the valve shaft mounting post (130). A spacer sealing ring (361) is provided around the middle of the valve shaft (300). The spacer sealing ring (361) divides the annular cavity between the periphery of the valve shaft (300) and the inner wall of the valve shaft mounting post (130) into two pressure relief channels (120). The valve shaft (300) is also provided with two fourth sealing rings (362) located on both sides of the spacer sealing ring (361). The fourth sealing rings (362) can be detachably sealed between the pressure relief channel (120) and the pressure chamber (110).

24. The waterway switching device according to claim 21, characterized in that: The drive mechanism (500) includes a ratchet seat (520), a button (510), and a slider (530). The button (510) is driven to the slider (530) so that the slider (530) can be moved by the button (510). The slider (530) is driven to the ratchet seat (520) so that the ratchet seat (520) can be rotated by the slider (530). The transmission seat (400) is provided with a first ratchet (420), and the ratchet seat (520) is provided with a second ratchet (521). The first ratchet (420) of the transmission seat (400) and the second ratchet (521) of the ratchet seat (520) mesh along the rotation axis so that the transmission seat (400) can be rotated in the forward direction by the ratchet seat (520).

25. The waterway switching device according to claim 24, characterized in that: The transmission seat (400) is mounted on the ratchet seat (520). The first ratchet (420) of the transmission seat (400) is arranged downwards, and the second ratchet (521) of the ratchet seat (520) is arranged upwards. The first ratchet (420) and the second ratchet (521) mesh vertically. The ratchet seat (520) is also provided with a gear (522), and the sliding member (530) is provided with a rack (531). The gear (522) meshes with the rack (531).

26. The waterway switching device according to claim 24, characterized in that: The valve shaft (300) moves in a direction parallel to the sliding direction of the sliding member (530), and at least two of the pilot valves (200) are arranged to the left and right relative to the valve shaft (300) in the direction of movement.

27. A shower head, characterized in that: The device includes a water distribution body (10) and a water circuit switching device according to claim 1 or 19. The valve shaft (300) is movable relative to the water distribution body (10). The fixed seat (100) is fixedly connected to the water distribution body (10). Each pilot valve (200) has a main outlet channel (600). The water distribution body (10) is provided with a plurality of partition structures (11). The partition structures (11) divide the water distribution body (10) into a plurality of outlet spaces (12). The pressure relief channel (120) of the pilot valve (200) and the main outlet channel (600) are connected to the same outlet space (12).

28. The shower head according to claim 27, characterized in that: The shower head also includes a shower head body (50), a water distribution seat (20), a water nozzle (30), and a face cover (40). The water distribution body (10) is disposed inside the shower head body (50). The water distribution seat (20) is fixedly connected to the bottom of the water distribution body (10). The water nozzle (30) is fixedly connected to the bottom of the water distribution seat (20). The face cover (40) is fixedly connected to the bottom of the water nozzle (30). Water flowing out from the water distribution body (10) can pass through the water distribution seat (20), the water nozzle (30), and the face cover (40) in sequence before flowing out of the shower head.

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