Water supply device and shower head

Abstract

The invention discloses a water supply device and a shower head, and the device comprises a main body which is provided with a water supply flow channel; the water path control mechanism comprises a valve rod which is arranged in the water supply flow channel and can move in the water supply flow channel in the length direction of the water supply flow channel, and a change-over switch which is arranged on the main body and is matched with the valve rod; the valve rod has a first position state for blocking the water supply flow channel and a second position state for opening the water supply flow channel; the change-over switch can drive the valve rod to reciprocate in the length direction of the water supply flow channel so as to switch the first position state and the second position state.

Description

Technical Field

[0001] This article relates to bathroom technology, in particular to a water supply device and a shower. Background Art

[0002] Existing showers generally have multiple water outlet channels on the water outlet tray to select shower outlet modes, thereby providing users with more bathing experiences. In the prior art, there are also flow switching devices set at the handle of handheld showers. This type of flow switching device usually adopts a ballpoint pen button structure, which is relatively complex in structure and difficult to identify the gear position of a single button switch. Summary of the invention

[0003] The embodiments of the present application provide a water supply device and a shower head, which can effectively control the water flow and have a simple structure.

[0004] An embodiment of the present application provides a water supply device, including: a main body, provided with a water supply channel; a water channel control mechanism, including a valve stem arranged in the water supply channel and capable of moving in the water supply channel along the length direction of the water supply channel, and a switching switch installed on the main body and installed in cooperation with the valve stem; the valve stem includes a first position state that blocks the water supply channel and a second position state that opens the water supply channel; the switching switch can drive the valve stem to reciprocate along the length direction of the water supply channel to switch between the first position state and the second position state.

[0005] In an exemplary embodiment, the main body includes an outer tube, an inner tube disposed in the outer tube and detachably mounted with the outer tube, and the valve stem separates the inner cavity of the inner tube into the water supply channel and the water outlet channel.

[0006] In an exemplary embodiment, the inner tube is provided with a mounting portion, and the outer tube is provided with a cavity for accommodating the switch and the mounting portion, and the cavity is isolated from the water supply channel and the water outlet channel.

[0007] In an exemplary embodiment, the valve stem includes a head mounted in cooperation with the switch, and a blocking portion located in the water supply channel; In the first position state, the outer wall of the blocking portion seals the inner wall of the water supply channel to block the water supply channel; In the second position state, a flow gap is formed between the outer wall of the blocking portion and the inner wall of the water supply channel to open the water supply channel.

[0008] In an exemplary embodiment, a water flow passage for opening the water supply flow passage is provided in the valve stem, and the water flow passage is a normally open flow passage; A water-saving sheet for limiting the water flow rate of the water flow channel is provided in the water flow channel; or, the flow area of ​​the water flow channel is smaller than the flow area of ​​the flow gap.

[0009] In an exemplary embodiment, an outer side wall of the sealing portion is provided with a sealing groove, and the valve stem further comprises a first sealing member installed in the sealing groove.

[0010] In an exemplary embodiment, the valve stem further includes a positioning portion, an outer wall of the positioning portion is circumferentially provided with a plurality of positioning ribs for sliding positioning with the inner wall of the water supply channel, and the positioning portion is further provided with an installation cavity for installing the water-saving sheet.

[0011] In an exemplary embodiment, the switching switch includes an operating portion exposed from an outer wall of the main body, and a supporting column extending from the operating portion into the main body; The head of the valve stem extends out of the water supply channel and is installed in cooperation with the support column. The head of the valve stem is movably sealed and assembled with the water supply channel.

[0012] In an exemplary embodiment, a ball is provided at the head of the valve stem, and the support column includes a hollow inner cavity and a guide groove communicated with the hollow inner cavity and for the ball to be installed from the end surface of the support column.

[0013] In an exemplary embodiment, the main body is provided with a mounting portion for mounting in cooperation with the switching switch; The operating part is a boat-shaped button, and the boat-shaped button is connected to the mounting part through a pivot structure, so that both ends of the boat-shaped button can be pressed to achieve clockwise or counterclockwise rotation to switch positions.

[0014] In an exemplary embodiment, a first limiting hole and a second limiting hole are provided at the bottom of the mounting portion, and the support column is further provided with a ball assembly that cooperates with the first limiting hole and the second limiting hole for positioning; In the first position state, the ball contact assembly cooperates with the first limiting hole for limiting position; in the second position state, the ball contact assembly cooperates with the second limiting hole for limiting position.

[0015] The embodiment of the present application further provides a shower head, comprising: a shower head body, and a water supply device as described in any of the above embodiments for supplying water to the shower head body.

[0016] The water supply device of the embodiment of the present application is provided with a water channel control mechanism, and the switching switch of the water channel control mechanism can drive the valve stem to move along the length direction of the water supply channel to block or open the water supply channel. It can block or open the water supply channel more effectively and has a simple structure.

[0017] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by implementing the present application. Other advantages of the present application can be realized and obtained by the schemes described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0019] Figure 1 This is an overall three-dimensional view of the shower head according to the embodiment of the present application; Figure 2 for Figure 1 3D split diagram of Figure 3 A three-dimensional view of a valve stem of a water supply device according to an embodiment of the present application; Figure 4 This is a three-dimensional exploded view of the inner tube and the switch of the water supply device according to the embodiment of the present application; Figure 5 A cross-sectional view of an inner tube of a water supply device according to an embodiment of the present application along an axial direction; Figure 6 for Figure 5 A magnified three-dimensional view of the middle mounting portion; Figure 7 A three-dimensional diagram of a switching switch of a water supply device according to an embodiment of the present application; Figure 8 This is a cross-sectional view showing the water-saving mode of the shower head in the embodiment of the present application; Fig. 9 for Figure 8 A partial enlarged view of Fig.10 This is a cross-sectional view showing the flow increase mode of the shower head in the embodiment of the present application; Fig.11 for Fig.10 A partial enlarged view of .

[0020] Figure numerals: shower head-100; shower head body-1a; water supply device-1b; rear cover body-11; water outlet tray-12; body-2; water supply channel-210; flow gap-2101; water outlet channel-211; outer tube-20; inner tube-21; water inlet seat assembly-22; switch-3; operating part-30; support column-31; hollow inner cavity-311; guide groove-310; inclined surface-302; valve stem-4; head-41; second sealing member-411; blocking part-42; positioning part-43; water passing part-44; water passing channel-45; water-saving sheet-5; ball-410; water outlet-440; positioning rib-430; installation cavity-431; sealing groove-420; first sealing member-421; installation part-212 ; Connecting tube part-213; Connecting thread-214; Raised rib-2121; Receiving groove-2122; Step surface-2123; First limiting hole-2124a; Second limiting hole-2124b; Shaft column-2110; Buckle groove-301; Ball bumper assembly-6. DETAILED DESCRIPTION

[0021] The present application describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present application. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0022] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in the present application may also be combined with any conventional features or elements to form a unique invention scheme. Any features or elements of any embodiment may also be combined with features or elements from other invention schemes to form another unique invention scheme. Therefore, it should be understood that any feature shown and / or discussed in the present application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the attached claims and their equivalents, the embodiments are not subject to other restrictions. In addition, various modifications and changes may be made within the scope of protection of the attached claims.

[0023] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps of the specific order described. As will be understood by those of ordinary skill in the art, other sequences of steps are also possible. Therefore, the specific sequence of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to the steps of performing them in the order written, and those skilled in the art can easily understand that these sequences can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0024] like Figure 1 , Figure 2 As shown, the present application provides a shower head 100, which includes a shower head body 1a, a water supply device 1b for supplying water to the shower head body 1a (see Figure 1 The shower body 1a includes a body 11 connected to the water supply device 1b, and a water outlet cover assembly 12 matched with the body 11.

[0025] like Figure 1 , Figure 2 As shown, the water supply device 1b includes a main body 2 and a waterway control mechanism. The main body 2 is provided with a water supply flow channel 210 (see Figure 8 The water channel control mechanism includes a valve stem 4 disposed in the water supply channel 210 and capable of moving in the water supply channel 2 along the length direction of the water supply channel 210 , and a switching switch 3 mounted on the main body 2 and mounted in cooperation with the valve stem 4 .

[0026] The valve stem 4 includes a first position state that blocks the water supply channel 210 (see Figure 8 , Fig. 9 ) and the second position state of opening the water supply channel 210 (refer to Fig.10 , Fig.11 The switch 3 can drive the valve stem 4 to reciprocate along the length direction of the water supply channel 210 to switch between the first position state and the second position state.

[0027] The water supply device 1 of the embodiment of the present application is provided with a water channel control mechanism, and the switching switch 3 of the water channel control mechanism can drive the valve stem 4 to move along the length direction of the water supply channel 210 to block or open the water supply channel 210, thereby effectively blocking or opening the water supply channel 210 and having simple structural parts.

[0028] like Figure 2 As shown, the main body 2 includes an outer tube 20, an inner tube 21 disposed in the outer tube 20 and detachably mounted with the outer tube 20, and a water inlet seat assembly 22 disposed in the outer tube 20 and detachably mounted with the water outlet end of the inner tube 20 (see Figure 8). The water inlet seat assembly 22 may include a water inlet seat, a spring, and a waist-shaped bowl (not marked, and may refer to the prior art description). In this embodiment, the main body 2 is assembled by the outer tube 20, the inner tube 21, the water inlet seat assembly 22, etc., and of course, it can also be formed in one piece, which is not limited here.

[0029] like Figure 5 , Figure 8-Figure 11 As shown, the valve stem 4 divides the inner cavity of the inner tube 21 into a water supply channel 210 and a water outlet channel 211 , and the blocking portion 4 of the valve stem 4 controls the connection and disconnection of the water supply channel 210 and the water outlet channel 211 .

[0030] In the first position, the outer wall of the blocking portion 42 seals the side wall of the water supply channel 210 to block the water supply channel 210 (see Figure 8 , Fig. 9 ), disconnecting the water supply channel 210 and the water outlet channel 211; in the second position state, a flow gap 2101 is formed between the outer wall of the blocking portion 42 and the inner wall of the water supply channel 210 to open the water supply channel 210 (see Fig.10 , Fig.11 ), so that the water supply channel 210 is connected with the water outlet channel 211 to supply water to the shower body 1a.

[0031] like Figure 3 As shown, the valve stem 4 includes a head 41 extending out of the water supply channel 210 and mounted in cooperation with the switch 3, a blocking portion 42, a positioning portion 43 and a water passing portion 44 arranged in the water supply channel 210. A sphere 410 is arranged at the top of the head 41; the water passing portion 44 is provided with a water through hole 440 connected to the water outlet channel 211; and a plurality of positioning ribs 430 are arranged along the circumferential direction on the side wall of the positioning portion 43 for sliding positioning with the inner wall of the water supply channel 210. The blocking portion 42 is provided with a sealing groove 420, and the valve stem 4 also includes a first sealing member 421 (see FIG. 4 ) installed in the sealing groove 420. Fig. 9 ), the first sealing member 421 is a sealing ring.

[0032] like Fig. 9 , Fig.11 As shown, a water flow channel 45 connected to the water supply flow channel 210 is provided in the valve stem 4, and the water flow channel 45 is a normally open flow channel. A water-saving piece 5 is provided in the water flow channel 45, and the water-saving piece 5 can limit the water flow and water pressure of the water flow channel 45 to achieve a constant flow of water. When the water flow is too large, the water-saving piece 5 can reduce the water flow channel, thereby achieving the purpose of saving water. In this embodiment, the positioning portion 43 of the valve stem 4 is provided with an installation cavity 431 for installing the water-saving piece 5.

[0033] The water supply device 1b of this embodiment has two water channels, one is the flow gap 2101, and the other is the water flow channel 45. When the user operates the switch 3, the flow gap 2101 and the water flow channel 45 can be selected to discharge water together, or the water flow channel 45 can be selected to discharge water alone, thereby realizing the switching between the water saving mode and the flow increasing mode.

[0034] In an exemplary embodiment, the water flow channel 45 may not be provided with a water-saving sheet 5, and the flow area of ​​the water flow channel 45 may be designed to be a flow area of ​​a small flow gap 2101, which can still achieve the purpose of water saving.

[0035] like Figure 4-Figure 6 As shown, the body of the inner tube 21 is provided with a mounting portion 212 for mounting the switch 3, the front end of the inner tube 21 is provided with a connecting pipe portion 213 for mounting with the water inlet seat assembly 22, and the end of the inner tube 21 is provided with a connecting thread 214 for connecting with a water pipe (not shown). The outer tube 20 is provided with a cavity for accommodating the mounting portion 212, and the cavity is isolated from the water supply flow channel 210 and the water outlet flow channel 211. The connecting pipe portion 213 is provided with an elastic clamping portion 2125 for clamping with the water inlet seat assembly 22.

[0036] like Figure 6 As shown, the mounting portion 212 is provided with a convex rib 2121 surrounding a receiving groove 2122. Step surfaces 2123 are respectively provided at both ends of the receiving groove 2122, and a first limiting hole 2124a and a second limiting hole 2124b are provided at the bottom of the receiving groove 2122.

[0037] like Figure 7 As shown, the switch 3 includes an operating portion 30 exposed from the outer wall of the main body 1, and a support column 31 extending from the operating portion 30 into the main body 2. The support column 31 includes a hollow inner cavity 311, and a guide groove 310 connected to the hollow inner cavity 311 and for the ball 410 to be installed and limited from the side of the support column 31, and the cross section of the guide groove 310 is C-shaped.

[0038] like Fig. 9 As shown, the head 41 of the valve stem 4 extends out of the water supply channel 210, passes through the guide groove 310, and is installed in cooperation with the support column 31 of the switch 3, and is limited in the guide groove 310. The head 41 of the valve stem 4 is movably sealed and assembled with the water supply channel 210. In this embodiment, the head 41 and the water supply channel 210 are movably sealed and assembled by arranging a second sealing member 411 at the connection portion between the water supply channel 210 and the head 41. The second sealing member 411 is a V-shaped sealing ring.

[0039] The operating part 30 in this embodiment is a boat-shaped button, which is connected to the mounting part 212 via a pivot structure, so that both ends of the boat-shaped button 30 can be pressed to achieve clockwise or counterclockwise rotation to switch positions, thereby switching the working state of the valve stem 4.

[0040] The pivot structure includes buckle slots 301 disposed on both sides of the boat-shaped button 30 (see Figure 7 ), and shaft columns 2120 (see FIG. 21 ) disposed on both sides of the mounting portion 212 and connected to the buckle groove 301 in cooperation with each other. Figure 6 ). The rib 2121 of the mounting portion 212 limits the outer contour of the boat-shaped button in the circumferential direction, and the shaft column 2110 is arranged on the door-shaped rib 2121. The bottom surfaces of the two pressing ends of the boat-shaped button 30 are provided with inclined surfaces 302, and the step surface 2123 of the receiving groove 2122 cooperates with the inclined surface 302 to limit the position. The support column 31 extends into and is supported in the receiving groove 2122, and the opposite sides of the end surface of the support column 31 are also inclined surfaces to realize the rotation of the switching switch 3.

[0041] like Figure 6 , Fig. 9 As shown, the support column 31 is also provided with a ball assembly 6 that cooperates with the first limiting hole 2124a and the second limiting hole 2124a for positioning. In the first position state, the ball assembly 6 cooperates with the first limiting hole 2124a for positioning; in the second position state, the ball assembly 6 cooperates with the second limiting hole 2124a for positioning. The ball assembly 6 of the embodiment of the present application includes a ball and a spring, which can position the valve stem 4.

[0042] When installing the water supply device 1a of the embodiment of the present application, the sealing portion 42 of the valve stem 4 is installed with the first sealing member 421, the second sealing member 411, and the water-saving sheet 5, and is inserted into the inner tube 21 from the water inlet direction, and the head 41 of the valve stem 4 extends out of the water supply channel 210. The switching switch 3 is installed with the ball assembly 6, and the switching switch 3 aligns its guide groove 310 with the ball 410 of the valve stem 4 and is installed in coordination with the valve stem 4. The switching switch 3 is installed in coordination with the mounting portion 212 through a pivot structure, so that the switching switch 3 can be pressed and rotated around the fulcrum of the inner tube 21. The cover plate 23 is assembled with the inner tube 21, and the water inlet seat assembly 23 is inserted in the opposite direction of the water inlet to mate with the inner tube 21, and then the water outlet cover assembly 12 is locked on the body 11.

[0043] The water supply device 100 of the embodiment of the present application has two modes when working, the first mode is a water-saving mode, and the second mode is a flow-increasing mode.

[0044] Such as 8. Fig. 9 As shown, when the water-saving mode is used, the user presses the switch 3, and the switch 3 rotates counterclockwise around the shaft 2120 of the inner tube 21 (see Fig. 9 The guide groove 310 on the switch 3 also rotates, hooking the ball 410 on the head 41 of the valve stem 4, forcing the valve stem 4 to move in the direction of the water flow (see FIG. Fig. 9The straight arrow indicates the direction). The ball assembly 6 on the switch 3 also moves to the corresponding positioning hole 2124a, and the blocking portion 42 on the valve stem 4 blocks the water supply channel 210, so that water can only flow through the water flow channel 45 of the valve stem 4 and flow into the water outlet channel 211 from the water port 440, and enter the shower body 1a to discharge water. Because a water-saving sheet 5 is installed at the water inlet end of the valve stem 4, the water path is restricted here, thereby achieving the purpose of water saving. The water-saving effect can be configured according to the existing water-saving sheets 5 of different specifications. The valve stem 4 may also not have a built-in constant-current water-saving sheet 5, which can be adjusted by designing the flow area design.

[0045] like Fig.10 , Fig.11 As shown, when the flow increase mode is used, the user presses the switch 3, and the switch 3 rotates clockwise around the shaft 2120 of the inner tube 21 (see Fig.11 The rotation arrow indicates the direction). The guide groove 310 on the switch 3 also rotates, pressing the valve stem 4 and forcing the valve stem 4 to move in the opposite direction of the water flow (see Fig.11 The straight arrow indicates the direction), the ball assembly 6 on the switching switch 3 also rotates to the corresponding positioning hole 2124b, and a flow gap 2101 is formed between the blocking portion 42 of the valve stem 4 and the water supply channel 210, so that water can flow into the water outlet channel 211 from the flow gap 2101 on the periphery of the valve stem 4, and can also flow into the water outlet channel 211 from the water flow channel 45 of the valve stem 4. The two water paths enter the shower body 1a for water discharge. At this time, the water-saving sheet 5 on the valve stem 4 only limits the flow of the water flow channel 45, and the water in the flow gap 2101 is not limited. The two water paths merge, the flow rate is greatly improved, and the boosting effect is obvious.

[0046] In the water-saving mode and the flow-increasing mode, the valve stem 4 is always subjected to the force of the water pressure in the direction of the water flow, that is, the water pressure on the cross-sectional area of ​​the valve stem 4. When the water pressure in the direction of the water flow on the valve stem 4 is greater than the friction of its movement, that is, the water pressure on the blocking portion 42 is greater than its main friction (the main friction is: the sum of the friction between the blocking portion 42 and the first seal, the friction between the head 41 and the switch 3, the friction of the ball assembly 6 and the rotation friction of the switch 3), the valve stem 4 will automatically return to the water-saving mode. At this time, the water-saving mode has a considerable shower spray effect, and there is no need to switch to the flow-increasing mode.

[0047] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include at least one of the features.

[0049] In the description of the present application, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0050] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A water supply device, characterized in that: include: The main body is provided with a water supply channel; The water channel control mechanism includes a valve stem which is arranged in the water supply channel and can move in the water supply channel along the length direction of the water supply channel, and a switching switch which is installed on the main body and cooperates with the valve stem; the valve stem includes a first position state for blocking the water supply channel and a second position state for opening the water supply channel; the switching switch can drive the valve stem to reciprocate along the length direction of the water supply channel to switch between the first position state and the second position state.

2. The water supply device according to claim 1, characterized in that: The main body comprises an outer tube, an inner tube which is arranged in the outer tube and can be detachably installed with the outer tube, and the valve stem separates the inner cavity of the inner tube into the water supply channel and the water outlet channel.

3. The water supply device according to claim 2, characterized in that: The inner tube is provided with a mounting portion, and the outer tube is provided with a cavity for accommodating the switch and the mounting portion, wherein the cavity is isolated from the water supply channel and the water outlet channel.

4. The water supply device according to any one of claims 1 to 3, characterized in that: The valve stem includes a head mounted in cooperation with the switch and a blocking portion located in the water supply channel; In the first position state, the outer wall of the blocking portion seals the inner wall of the water supply channel to block the water supply channel; In the second position state, a flow gap is formed between the outer wall of the blocking portion and the inner wall of the water supply channel to open the water supply channel.

5. The water supply device according to claim 4, characterized in that: A water passage for opening the water supply passage is provided in the valve stem, and the water passage is a normally open passage; A water-saving sheet for limiting the water flow rate of the water flow channel is provided in the water flow channel; or, the flow area of ​​the water flow channel is smaller than the flow area of ​​the flow gap.

6. The water supply device according to claim 4, characterized in that: The outer side wall of the blocking portion is provided with a sealing groove, and the valve stem further comprises a first sealing member installed in the sealing groove.

7. The water supply device according to claim 5, characterized in that: The valve stem also includes a positioning portion, and the outer wall of the positioning portion is circumferentially provided with a plurality of positioning ribs that are slidably positioned with the inner wall of the water supply channel. The positioning portion is also provided with an installation cavity for installing the water-saving sheet.

8. The water supply device according to claim 4, characterized in that: The switch includes an operating portion exposed from the outer wall of the main body, and a support column extending from the operating portion into the main body; The head of the valve stem extends out of the water supply channel and is installed in cooperation with the support column. The head of the valve stem is movably sealed and assembled with the water supply channel.

9. The water supply device according to claim 8, characterized in that: The head of the valve stem is provided with a ball, and the support column comprises a hollow inner cavity and a guide groove which is communicated with the hollow inner cavity and is used for the ball to be installed from the end surface of the support column.

10. The water supply device according to claim 8, characterized in that: The main body is provided with a mounting portion for mounting in cooperation with the switching switch; The operating part is a boat-shaped button, and the boat-shaped button is connected to the mounting part through a pivot structure, so that both ends of the boat-shaped button can be pressed to achieve clockwise or counterclockwise rotation to switch positions.

11. The water supply device according to claim 8, characterized in that: The bottom of the mounting portion is provided with a first limiting hole and a second limiting hole, and the support column is further provided with a ball assembly that cooperates with the first limiting hole and the second limiting hole for positioning; In the first position state, the ball contact assembly cooperates with the first limiting hole for limiting position; in the second position state, the ball contact assembly cooperates with the second limiting hole for limiting position.

12. A shower head, characterized in that: include: A shower body, and a water supply device as claimed in any one of claims 1 to 11 for supplying water to the shower body.

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