A water stop switching valve core and shower head

Abstract

The present invention provides a water-stop switching valve core, comprising: a fixed shaft and a switching shaft coaxially arranged in the fixed shaft; the switching shaft is linked with an operating member and arranged in the fixed shaft to move between a first position, a second position and a third position along the axial direction; one end of the switching shaft is a water inlet end, and the other end is a water outlet end, forming a water flow channel along the axial direction; when the switching shaft is located at the first position, the water inlet end is closed to form a water-stop state; when the switching shaft is located at the second position, the water inlet end is opened, and an air inlet is formed between a side wall of the switching shaft close to the water outlet end and the fixed shaft, when water flows into the fixed shaft from the water outlet end, since the diameter of the fixed shaft is larger than the diameter of the water outlet end, a Venturi effect is generated to suck air from the air inlet into the fixed shaft and mix it with the water flow, forming an air-inhaled shower water outlet; when the switching shaft is located at the third position, the water inlet end remains in an open state and the air inlet is closed, forming an ordinary water outlet.

Description

Technical Field

[0001] The invention relates to a water outlet device, in particular to a water stop valve core in the water outlet device. Background Art

[0002] The valve core in the shower head generally has the function of switching the water spray and water stop, which is convenient for users to switch the water spray or turn the water on and off while holding the shower head. However, with the increase of shower head functions, the existing shower heads are no longer simply equipped with shower water with several different water outlet shapes, but functional water with some functional effects, such as air-absorbent shower water. Air is mixed in the water of the air-absorbent shower water, and the air in the water flow increases the impact force of the water flow. However, different consumer groups have different requirements for the impact force of the water flow. For example, the elderly and children may need a water flow with a weaker impact force, while young people need a water flow with a stronger impact force. However, the existing shower head valve cores cannot achieve the switching between the three modes of water stop, ordinary water and functional water. Summary of the invention

[0003] The main technical problem to be solved by the present invention is to provide a water-stop switching valve core which, in addition to the two states of water-stopping and water-discharging, also has a water-discharging gear position of functional water.

[0004] In order to solve the above technical problems, the present invention provides a water stop switching valve core, comprising: a fixed shaft and a switching shaft coaxially arranged inside the fixed shaft; the switching shaft is linked with an operating member so that the switching shaft moves axially inside the fixed shaft between a first position, a second position and a third position;

[0005] One end of the switching shaft is a water inlet end, and the other end is a water outlet end, forming a water flow channel along the axial direction; when the switching shaft is located at the first position, the water inlet end is closed to form a water stop state; when the switching shaft is located at the second position, the water inlet end is opened, and an air inlet is formed between the side wall of the switching shaft close to the water outlet end and the fixed shaft. When water flows from the water outlet end into the fixed shaft, since the diameter of the fixed shaft is larger than the diameter of the water outlet end, a Venturi effect is generated to suck air from the air inlet into the fixed shaft and mix it with the water flow, forming an air-inhaled shower water outlet; when the switching shaft is located at the third position, the water inlet end remains open and the air inlet is closed to form ordinary water outlet.

[0006] In a preferred embodiment: it also includes a first sealing member coaxially arranged with the switching shaft, the first sealing member is axially arranged behind the water inlet end, when the switching shaft is located at the first position, the end face of the water inlet end abuts against the first sealing member to close the water inlet end.

[0007] In a preferred embodiment: the side of the fixed shaft close to the water inlet end is connected to the water inlet joint; the side of the water inlet joint close to the water inlet end has a accommodating cavity; the first sealing member is arranged in the accommodating cavity; water flows into the accommodating cavity from the water inlet joint and can only flow into the fixed shaft through the water flow channel.

[0008] In a preferred embodiment: the first sealing member is respectively abutted against an elastic member and a support member on both sides along the axial direction; when the switching shaft is located at the first position, the elastic member generates a supporting force on the first sealing member, so that it maintains a sealed fit with the end face of the water inlet end; when the switching shaft is located at other positions, the elastic member drives the first sealing member to return to its initial position abutting against the support member.

[0009] In a preferred embodiment: the support member has a clearance hole provided along the axial direction, and the water inlet end of the switching shaft passes through the clearance hole and enters the accommodating cavity;

[0010] The outer periphery of the support member is also provided with a water inlet perpendicular to the axial direction, and water flows in through the water inlet joint and then flows into the accommodating cavity through the water inlet.

[0011] In a preferred embodiment: a certain gap is provided between a side of the first seal away from the water inlet end and the rear end of the accommodating chamber; when the switching shaft is located at the first position, water flows from the water inlet of the support member into the accommodating chamber, so that the first seal is subjected to water pressure on both the front and back sides along the axial direction, and the pressures are equal in magnitude and opposite in direction, and are in a water pressure balance state.

[0012] In a preferred embodiment: a second sealing member is further provided on the side of the outer wall of the switching shaft close to the water inlet end to seal the gap between the switching shaft and the clearance hole, so that the water flow in the accommodating cavity can only flow into the fixed shaft through the water flow channel.

[0013] In a preferred embodiment: a third sealing member is further provided on a side of the switching shaft close to the water outlet; the fixed shaft has a first chamber and a second chamber connected to each other along the axial direction, the diameter of the first chamber is smaller than that of the second chamber, so that a step surface is formed at the connection between the first chamber and the second chamber; water flows from the water outlet end of the switching shaft into the first chamber;

[0014] During the movement of the switching shaft from the first position to the third position, the third sealing component moves toward the direction close to the step surface; when the switching shaft is located at the second position, the third sealing component is not in contact with the step surface, so there is a gap directly between the outer wall of the switching shaft and the step surface to form the air inlet; when the switching shaft is located at the third position, the third sealing component abuts against the step surface to close the air inlet.

[0015] The present invention further provides a shower head, comprising: a shower head body and the water stop switching valve core as described above; the shower head body comprises a water outlet cover and a handle, and the water stop switching valve core is arranged in the handle.

[0016] In a preferred embodiment: the operating member is a button, the button is exposed outside the body, and a fixing seat is provided inside the body; one end of the button is rotatably connected to the fixing seat, and the other end is a pressing end;

[0017] The fixed seat is also rotatably connected to a swing block. When the pressing end of the button is pressed down, the swing block is squeezed by the button and swings. The swing block is linked to a transmission block during the swinging process. The transmission block converts the swinging of the swing block into movement along the axial direction; when the transmission block moves along the axial direction, it drives the switching shaft to move.

[0018] In a preferred embodiment: a reset member is sleeved on the outer periphery of the switching shaft, one end of the reset member abuts against the switching shaft, and the other end abuts against the fixed shaft; during the movement of the switching shaft from the third position to the first position, the reset member is squeezed to accumulate elastic reset force.

[0019] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0020] 1. The present invention provides a water-stop switching valve core. By moving the switching shaft along the axial direction, the switching shaft closes the water inlet end during the movement to achieve a water-stop state, or closes the air inlet and opens the water inlet end to achieve ordinary shower water discharge, or opens the air inlet and the water inlet end respectively to achieve air-intake shower water discharge. Therefore, the switching of three modes, namely water-stop, ordinary water and functional water, can be realized. And the switching process is a one-way cycle, which is relatively simple to operate.

[0021] 2. The present invention provides a water-stop switching valve core, which uses the sudden change of the water flow area when the water flows from the water outlet end of the switching shaft into the first chamber of the fixed shaft to produce the Venturi effect, and the air is sucked into the first chamber from the air inlet to mix with the water flow to form a suction shower water. The structure of the suction shower water produced in this way is simple and reliable.

[0022] 3. The present invention provides a water-stop switching valve core. When the switching shaft is located at the first position, there is water at both ends of the first sealing gasket along the axial direction. Therefore, the first sealing gasket is in a water pressure balance state. The switching shaft does not need to overcome the pressure of the water flow during the movement, and the switching feel is lighter and more labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an exploded view of the structure of the shower head in the preferred embodiment of the present invention;

[0024] Figure 2 It is a structural cross-sectional view of a shower head in a preferred embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of water flow when the switching shaft is located at the first position in a preferred embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of water flow when the switching shaft is located at the second position in a preferred embodiment of the present invention;

[0027] Figure 5 Schematic diagram of water flow when the switching shaft is located at the third position in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to better understand the technical content of the present invention, a specific implementation method is described as follows in conjunction with the accompanying drawings.

[0029] refer to Figure 1-5 A shower head comprises: a shower head body 1 and a water stop switching valve core 2; the shower head body 1 comprises a water outlet cover 11 and a handle 12, and the water stop switching valve core 2 is arranged in the handle 12.

[0030] The water stop switching valve core 2 comprises: a fixed shaft 21 and a switching shaft 22 disposed in the fixed shaft 21 and coaxially therewith; the switching shaft 22 is linked with an operating member 3 so that the switching shaft 22 moves axially in the fixed shaft 21 between a first position, a second position and a third position;

[0031] One end of the switching shaft 22 is a water inlet end 221, and the other end is a water outlet end 222, forming a water flow channel along the axial direction; when the switching shaft 22 is located at the first position, the water inlet end 221 is closed to form a water stop state; when the switching shaft 22 is located at the second position, the water inlet end 221 is opened, and an air inlet 223 is formed between the side wall of the switching shaft 22 close to the water outlet end 221 and the fixed shaft 21. When water flows from the water outlet end 222 into the fixed shaft 21, since the diameter of the fixed shaft 21 is larger than the diameter of the water outlet end 222, a Venturi effect is generated to suck air from the air inlet 223 into the fixed shaft 21 and mix with the water flow to form an air-inhaled shower water outlet; when the switching shaft 22 is located at the third position, the water inlet end 221 remains open and the air inlet 223 is closed to form ordinary water outlet.

[0032] As described above, the above structure realizes that the switching shaft 22 closes the water inlet end 221 to achieve a water stop state during the unidirectional movement, or closes the air inlet 223 and opens the water inlet end 221 to achieve ordinary shower water discharge, or opens the air inlet 223 and the water inlet end 221 at the same time to achieve air suction shower water discharge. Therefore, through the unidirectional movement of the switching shaft 22, the three modes of water stop, ordinary water and functional water can be switched, and the operation is relatively simple.

[0033] In order to close the water inlet end 221 when the switch shaft 22 is in the first position, the following structure is adopted in this embodiment:

[0034] It also includes a first sealing member 23 coaxially arranged with the switching shaft 22. The first sealing member 23 is axially arranged behind the water inlet end 221. When the switching shaft 22 is located at the first position, the end face of the water inlet end abuts against the first sealing member 23, thereby closing the water inlet end 221.

[0035] Specifically, the installation position of the first sealing member 23 is as follows: the side of the fixed shaft 21 close to the water inlet end 221 is connected to the water inlet joint 24; the side of the water inlet joint 24 close to the water inlet end 221 has a accommodating chamber 241; the first sealing member 23 is arranged in the accommodating chamber 241; water flows from the water inlet joint 24 into the accommodating chamber 241, and can only flow into the fixed shaft 21 through the water flow channel.

[0036] In order to ensure the stability of the seal, when the first seal 23 is pressed against the water inlet end 221 for sealing, the first seal must remain in contact with the water inlet end, and cannot be squeezed by the first seal 23 and move backwards to cause unreliable sealing. In order to solve this problem, the first seal 23 is respectively set against an elastic member 231 and a support member 232 on both sides along the axial direction; when the switching shaft 21 is in the first position, the elastic member 231 generates a supporting force on the first seal 23, so that it maintains a sealing contact state with the end face of the water inlet end 221; when the switching shaft 22 is in other positions, the elastic member 231 drives the first seal 23 to return to the initial position against the support member 232. Since the elastic member 231 provides an elastic restoring force, when the end face of the water inlet end 221 presses against the first sealing member 23, the elastic restoring force provided by the elastic member 231 is in the opposite direction to the pressing force of the water inlet end 221 on the first sealing member 23. This ensures that the first sealing member 23 will not retreat axially and always maintain a close seal with the end face of the water inlet end 221.

[0037] Based on the above structure, the support member 232 has a clearance hole axially arranged, and the water inlet end 221 of the switching shaft 22 passes through the clearance hole and enters the accommodating cavity 241; in this way, the support member 232 will not hinder the movement of the switching shaft 22.

[0038] In addition, in order to introduce the water flow in the water inlet connector 24 into the part of the accommodating cavity 241 where the water inlet end 221 is located, the outer periphery of the support member 232 also has a water inlet perpendicular to the axial direction. After the water flows in through the water inlet connector 24, it flows into the accommodating cavity 241 through the water inlet.

[0039] In addition, in order to ensure the reliability of water stopping, as described above, water flows from the water inlet joint 24 into the accommodating chamber 241, and can only flow into the fixed shaft 21 through the water passage. In this way, when the water inlet end 221 is closed, no water will flow into the fixed shaft 21. However, in the above structure, the water will pass through the water inlet of the support member 232, and the support member is also provided with a clearance hole, and the water will inevitably flow out from the clearance hole.

[0040] In order to solve this problem, a second sealing member 224 is provided on the side of the outer wall of the switching shaft 22 close to the water inlet end 221 to seal the gap between the switching shaft 22 and the clearance hole, so that the water flow in the accommodating cavity 241 can only flow into the fixed shaft 21 through the water flow channel.

[0041] Furthermore, there is a certain gap between the side of the first sealing member 23 away from the water inlet end 221 and the rear end of the accommodating chamber 241; when the switching shaft 22 is in the first position, water flows from the water inlet of the support member 232 to the accommodating chamber 241, so that the first sealing member 23 is subjected to water pressure on both the front and back sides along the axial direction, and the pressure is equal in magnitude and opposite in direction, and is in a water pressure balance state. In this way, the switching shaft 22 does not need to overcome the resistance of the water flow during the movement, and the switching force is relatively light and the feel is relatively good.

[0042] In order to realize the suction shower water, in this embodiment, a third sealing member 225 is further provided on the side of the switching shaft 22 close to the water outlet 222; the fixed shaft 21 has a first chamber 211 and a second chamber 212 that are interconnected along the axial direction, and the diameter of the first chamber 211 is smaller than that of the second chamber 212, so that a step surface 213 is formed at the connection between the first chamber 211 and the second chamber 212; the water flows into the first chamber 211 from the water outlet of the switching shaft 22; in order to realize the Venturi effect, the diameter of the first chamber 211 is larger than the diameter of the water outlet 222, so that when the water flows from the water outlet 222 into the first chamber 211, a sudden change in the water flow area occurs, resulting in the Venturi effect.

[0043] When the switching shaft 22 moves from the first position to the third position, the third sealing member 225 moves toward the step surface 213; when the switching shaft 22 is at the second position, the third sealing member 225 does not contact the step surface 213, so there is a gap between the outer wall of the switching shaft 22 and the step surface 213 to form the air inlet 223; when the switching shaft 22 is at the third position, the third sealing member 225 abuts against the step surface 213 to close the air inlet 223. Thus, the switching between the air suction shower water outlet and the ordinary water outlet is realized.

[0044] Furthermore, the operating member 3 is a button, which is exposed outside the body 1, and a fixing seat 13 is provided inside the body 1; one end of the button is rotatably connected to the fixing seat 13, and the other end is a pressing end;

[0045] The fixing seat 13 is also rotatably connected with a swing block 14. When the pressing end of the button 3 is pressed down, the swing block 14 is squeezed by the button 3 and swings. The swing block 14 is linked with a transmission block 15 during the swinging process. The transmission block 15 converts the swinging of the swing block 14 into movement along the axial direction. When the transmission block 15 moves along the axial direction, it drives the switching shaft 22 to move. In this way, pressing the button 3 drives the switching shaft 22 to move backward along the axial direction, that is, it moves from the third position to the first position.

[0046] In order to realize the forward movement of the switching shaft 22 along the axial direction, a reset member 226 is sleeved on the outer periphery of the switching shaft 22, one end of the reset member 226 abuts against the switching shaft 22, and the other end abuts against the support member 232; during the movement of the switching shaft 22 from the third position to the first position, the reset member 226 is squeezed to accumulate elastic reset force. When the abutting relationship between the transmission block 15 and the switching shaft 22 is released, the switching shaft 22 moves from the first position to the third position under the action of the elastic reset force.

[0047] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A water stop switching valve core, characterized in that include: A fixed shaft and a switching shaft disposed in the fixed shaft and arranged coaxially therewith; the switching shaft is arranged in linkage with an operating member so that the switching shaft moves axially in the fixed shaft between a first position, a second position and a third position; One end of the switching shaft is a water inlet end, and the other end is a water outlet end, forming a water flow channel along the axial direction; when the switching shaft is located at the first position, the water inlet end is closed to form a water stop state; when the switching shaft is located at the second position, the water inlet end is opened, and an air inlet is formed between the side wall of the switching shaft close to the water outlet end and the fixed shaft. When water flows from the water outlet end into the fixed shaft, since the diameter of the fixed shaft is larger than the diameter of the water outlet end, a Venturi effect is generated to suck air from the air inlet into the fixed shaft and mix it with the water flow, forming an air-inhaled shower water outlet; when the switching shaft is located at the third position, the water inlet end remains open and the air inlet is closed to form ordinary water outlet.

2. A water stop switching valve core according to claim 1, characterized in that: It also includes a first sealing member coaxially arranged with the switching shaft. The first sealing member is axially arranged behind the water inlet end. When the switching shaft is located at the first position, the end surface of the water inlet end abuts against the first sealing member to close the water inlet end.

3. A water stop switching valve core according to claim 2, characterized in that: The side of the fixed shaft close to the water inlet end is connected to the water inlet joint; the side of the water inlet joint close to the water inlet end has a accommodating cavity; the first sealing member is arranged in the accommodating cavity; water flows into the accommodating cavity from the water inlet joint and can only flow into the fixed shaft through the water flow channel.

4. A water stop switching valve core according to claim 3, characterized in that: The first sealing member is respectively abutted against an elastic member and a supporting member on both sides along the axial direction; when the switching shaft is located at the first position, the elastic member generates a supporting force on the first sealing member, so that it maintains a sealed fit with the end face of the water inlet end; when the switching shaft is located at other positions, the elastic member drives the first sealing member to return to its initial position abutting against the supporting member.

5. The water stop switching valve core according to claim 4, characterized in that: The support member has a clearance hole which is axially penetrated, and the water inlet end of the switching shaft passes through the clearance hole and enters the accommodating cavity; The outer periphery of the support member is also provided with a water inlet perpendicular to the axial direction, and water flows in through the water inlet joint and then flows into the accommodating cavity through the water inlet.

6. A water stop switching valve core according to claim 5, characterized in that: There is a certain gap between the side of the first seal away from the water inlet end and the rear end of the accommodating chamber; when the switching shaft is in the first position, water flows from the water inlet of the support member to the accommodating chamber, so that the first seal is subjected to the pressure of the water flow on both the front and back sides along the axial direction, and the pressures are equal in magnitude and opposite in direction, and are in a water pressure balance state.

7. The water stop switching valve core according to claim 5, characterized in that: A second sealing member is also provided on one side of the outer wall of the switching shaft close to the water inlet end to seal the gap between the switching shaft and the clearance hole, so that the water flow in the accommodating cavity can only flow into the fixed shaft through the water flow channel.

8. The water stop switching valve core according to claim 1, characterized in that: A third sealing member is also provided on one side of the switching shaft close to the water outlet end; the fixed shaft has a first chamber and a second chamber connected to each other along the axial direction, the diameter of the first chamber is smaller than that of the second chamber, so that a step surface is formed at the connection between the first chamber and the second chamber; water flows from the water outlet end of the switching shaft into the first chamber; During the movement of the switching shaft from the first position to the third position, the third sealing component moves toward the direction close to the step surface; when the switching shaft is located at the second position, the third sealing component is not in contact with the step surface, so there is a gap directly between the outer wall of the switching shaft and the step surface to form the air inlet; when the switching shaft is located at the third position, the third sealing component abuts against the step surface to close the air inlet.

9. A shower head, characterized in that include: A shower body and a water stop switching valve core as described in any one of claims 1 to 8; the shower body comprises a water outlet cover and a handle, and the water stop switching valve core is arranged in the handle.

10. A shower head according to claim 9, characterized in that: The operating member is a button, and a fixing seat is provided in the body; one end of the button is rotatably connected to the fixing seat, and the other end is a pressing end; The fixed seat is also rotatably connected to a swing block. When the pressing end of the button is pressed down, the swing block is squeezed by the button and swings. The swing block is linked to a transmission block during the swinging process. The transmission block converts the swinging of the swing block into movement along the axial direction; when the transmission block moves along the axial direction, it drives the switching shaft to move.

11. A shower head according to claim 10, characterized in that: A reset member is sleeved on the outer periphery of the switching shaft, one end of the reset member abuts against the switching shaft, and the other end abuts against the fixed shaft; when the switching shaft moves from the third position to the first position, the reset member is squeezed to accumulate elastic reset force.

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