阅读说明：本技术 一种生活水和纯净水独运行的双水路铵键阀芯 (Two water course ammonium key case that life water and pure water moved alone ) 是由 符立华 于 2020-12-14 设计创作，主要内容包括：一种生活水和纯净水独运行的双水路铵键阀芯,它包括底座、壳体、静陶瓷片、动陶瓷片、导水座、封水盖、阀杆、阀芯、旋钮和驱动组件,静陶瓷片设在底座上,冷水导水孔、热水导水孔、生活导水孔分别与冷水进水孔、热水进水孔和生活水出水孔连通,径向导水槽与座纯净水孔连通；动陶瓷片设在静陶瓷片上,动轴向纯净水孔与静轴向纯净水孔连通；封水盖设在导水腔的上开口上且密封,底座与壳体的下端连接,旋钮的筒形驱动部与壳体的套筒转动配合且密封,底盖部与壳体顶板液密封；驱动组件设在旋钮的筒形驱动部内并与阀杆配合。不管纯净水路导通还是关闭,转动旋钮,均可实现冷水、混合水及热水模式；生活水路和纯净水路相互独立,互不干涉。(A double-water-circuit ammonium key valve core allowing domestic water and pure water to run independently comprises a base, a shell, a static ceramic piece, a movable ceramic piece, a water guide seat, a water sealing cover, a valve rod, a valve core, a knob and a driving assembly, wherein the static ceramic piece is arranged on the base; the moving ceramic plate is arranged on the static ceramic plate, and the moving axial pure water hole is communicated with the static axial pure water hole; the water sealing cover is arranged on the upper opening of the water guide cavity and is sealed, the base is connected with the lower end of the shell, the cylindrical driving part of the knob is in rotating fit with the sleeve of the shell and is sealed, and the bottom cover part is in liquid seal with the top plate of the shell; the drive assembly is disposed within the cylindrical drive portion of the knob and cooperates with the valve stem. The cold water, mixed water and hot water modes can be realized by rotating the knob no matter the pure water path is switched on or switched off; the life water path and the pure water path are mutually independent and do not interfere with each other.)

1. The utility model provides a two water course ammonium key case that life water and pure water moved alone which characterized in that: it comprises a base, a shell, a static ceramic piece, a movable ceramic piece, a water guide seat, a water sealing cover, a valve rod, a valve core, a knob and a driving component,

the base is provided with a cold water inlet hole, a hot water inlet hole, a domestic water outlet hole and a pure water hole,

the shell is provided with a lower opening and comprises a sleeve arranged on the top plate and a shell pure water hole arranged on the circumferential wall along the radial direction;

the static ceramic plate comprises a cold water guiding hole, a hot water guiding hole, a living water guiding hole, a static axial pure water hole arranged in the center and a radial water guiding groove arranged on the lower surface and communicated with the axial pure water hole, and the cold water guiding hole, the hot water guiding hole and the living water guiding hole are respectively in an arc shape;

the movable ceramic plate comprises a cold water hole, a hot water hole, a living water hole, a movable axial pure water hole arranged in the center and an annular water tank arranged on the upper surface, and the cold water hole, the hot water hole and the living water hole are communicated with the annular water tank; the cold water hole, the hot water hole and the domestic water hole are respectively in arc shapes;

the water guide seat comprises a base, a water guide cavity arranged on the base, a valve core seat arranged on the base and a plurality of water guide holes arranged on the water guide cavity,

the knob comprises a cylindrical driving part with a lower opening and a bottom cover part, and a top plate of the cylindrical driving part is provided with a guide hole;

the static ceramic plate is arranged on the base, the cold water guide hole, the hot water guide hole and the life water guide hole are respectively communicated with the cold water inlet hole, the hot water inlet hole and the life water outlet hole, and the radial water guide groove is communicated with the pure water hole; the moving ceramic plate is arranged on the static ceramic plate, and the moving axial pure water hole is communicated with the static axial pure water hole; the water guide seat is arranged on the movable ceramic sheet and connected together, and the valve core seat is communicated with the movable axial purified water; the water sealing cover is arranged on the upper opening of the water guide cavity and is sealed, the valve rod is in sliding fit with the valve rod hole of the water sealing cover, the valve core is matched with the valve core seat, and the pressure spring is arranged between the top circular disc of the valve rod and the water sealing seat; the upper end of the water guide seat is inserted into the bottom cover part of the knob, the base is connected with the lower end of the shell, the cylindrical driving part of the knob is in rotating fit and sealing with the sleeve of the shell, and the bottom cover part is in liquid sealing with the top plate of the shell; the driving component is arranged in the cylindrical driving part of the knob and is matched with the valve rod; the drive assembly rotates along with the knob, and the drive assembly is in sliding fit with the top of the valve rod.

2. The dual-water-path ammonium key valve core allowing domestic water and purified water to run independently of claim 1, is characterized in that: the valve core is attached to the valve core seat, the domestic water is conducted, and the purified water is shut off; the valve core is separated from the valve core seat, the domestic water is conducted, and the purified water is normally conducted.

3. The dual-water-path ammonium key valve core allowing domestic water and purified water to run independently of claim 1, is characterized in that: the central angle of the radial central line of the cold water hole and the hot water hole of the movable ceramic piece is larger than that of the radial central line of the cold water guide hole and the hot water guide hole of the static ceramic piece;

the movable ceramic plate rotates, and water is discharged according to the sequence of cold water, cold-hot mixed water and hot water; .

4. The dual-water-path ammonium key valve core allowing domestic water and purified water to run independently of claim 1, is characterized in that: the living water guide holes on the static ceramic plate are gradually increased from bottom to top in the clockwise or anticlockwise direction.

5. The dual-water-path ammonium key valve core allowing domestic water and purified water to run independently of claim 1, is characterized in that: the guide hole of the cylindrical driving part of the knob is provided with an axial guide groove, the inner wall of the cylindrical driving part of the knob is provided with a plurality of teeth, a deep axial groove is formed by a gap between two adjacent teeth, and the teeth are provided with a shallow axial groove and a spiral surface positioned on one side of the lower end; the deep axial groove and the shallow axial groove are respectively opposite to the axial guide groove;

the driving assembly comprises a button, a driven member and a return spring;

the button comprises a hollow sliding body part with a lower opening, a driving tooth arranged at the lower part of the outer circumferential surface of the sliding body part and an axial guide rail with the lower end connected with the driving tooth, and the lower end of the driving tooth is angular;

the driven part comprises a circular bottom plate, a sliding cavity with an upper opening arranged on the circular bottom plate and driven teeth arranged on the circular seat plate and surrounding the sliding cavity, and the upper ends of the driven teeth are provided with driven spiral surfaces;

the reset spring is arranged in the sliding cavity, the sliding cavity is arranged in the sliding body part and is in sliding fit, the upper end of the reset spring is matched with the top of the sliding body part, the driving teeth are matched with the driven teeth, and the driven teeth are matched with the teeth; the sliding body part of the button penetrates through the guide hole to extend out of the knob, the axial guide rail is in sliding fit with the axial guide groove, the circular bottom plate is in sliding fit with the disc at the top of the valve rod in a relative mode, and the driven piece drives the valve rod to move axially.

6. The dual-water-path ammonium key valve core allowing domestic water and purified water to run independently according to claim 5, is characterized in that: also comprises a round ball which is provided with a round ball,

a circular cavity with an upper opening is arranged on the disc at the top of the valve rod;

the round bottom plate is provided with a round hole with a lower opening;

the round ball is arranged in the round cavity and extends out of the round cavity, the round ball is in running fit with the lower end of the round hole, and a gap is reserved between the round bottom plate and the round disc at the top of the valve rod.

7. The dual-water-path ammonium key valve core allowing domestic water and purified water to run independently of claim 6, is characterized in that: the upper end of the sliding body part of the button is provided with a connecting part, and an internal thread connecting sleeve is arranged in the connecting part;

the reset spring is in a cone frustum shape;

the buffer ball is arranged at the top of the return spring and matched with the lower end of the internal thread connecting sleeve.

Technical Field

The invention relates to a double-water-path valve core.

Background

In the prior art, a mixing faucet is a faucet which mixes cold water and hot water together and can adjust the water temperature. The valve core of the water tap inside the water tap controls the water outlet flow, and when the water tap is used, the switch is turned on by lightly pulling the switch with hands, and then the water temperature is adjusted by rotating. With the advent of water purifiers, more and more people select a way of separating drinking water from other domestic water, for example, drinking water uses purified water purified by the water purifier, and vegetables and dishes are washed using common mixed water, i.e., raw water. This approach is clearly a great benefit to the health of the person. In a traditional kitchen, in order to take purified water, a purified water outlet faucet needs to be independently installed, so that a part of the kitchen sink faucet is too many and inconvenient to use. Some water taps are internally designed into double water paths and double switches, one switch is used for controlling running water, and the other switch is used for controlling purified water. The reason that the internal structure of the faucet is complex and two switches are required to be adopted for respective control is mainly because the valve core of the existing faucet can not realize the complete independent distribution of purified water and raw water.

Disclosure of Invention

The purpose of the invention is: the double-water-path ammonium key valve core for the independent operation of the domestic water and the purified water has the characteristics of independent purified water and independent domestic water.

The invention is realized by the following steps: a double-water-circuit ammonium key valve core for independently running domestic water and purified water comprises a base, a shell, a static ceramic piece, a movable ceramic piece, a water guide seat, a water sealing cover, a valve rod, a valve core, a knob and a driving component,

the base is provided with a cold water inlet hole, a hot water inlet hole, a domestic water outlet hole and a pure water hole,

the shell is provided with a lower opening and comprises a sleeve arranged on the top plate and a shell pure water hole arranged on the circumferential wall along the radial direction;

the static ceramic plate comprises a cold water guiding hole, a hot water guiding hole, a living water guiding hole, a static axial pure water hole arranged in the center and a radial water guiding groove arranged on the lower surface and communicated with the axial pure water hole, and the cold water guiding hole, the hot water guiding hole and the living water guiding hole are respectively in an arc shape;

the movable ceramic plate comprises a cold water hole, a hot water hole, a living water hole, a movable axial pure water hole arranged in the center and an annular water tank arranged on the upper surface, and the cold water hole, the hot water hole and the living water hole are communicated with the annular water tank; the cold water hole, the hot water hole and the domestic water hole are respectively in arc shapes;

the water guide seat comprises a base, a water guide cavity arranged on the base, a valve core seat arranged on the base and a plurality of water guide holes arranged on the water guide cavity,

the knob comprises a cylindrical driving part with a lower opening and a bottom cover part, and a top plate of the cylindrical driving part is provided with a guide hole;

the static ceramic plate is arranged on the base, the cold water guide hole, the hot water guide hole and the life water guide hole are respectively communicated with the cold water inlet hole, the hot water inlet hole and the life water outlet hole, and the radial water guide groove is communicated with the purified water outlet hole; the moving ceramic plate is arranged on the static ceramic plate, and the moving axial pure water hole is communicated with the static axial pure water hole; the water guide seat is arranged on the movable ceramic sheet and connected together, and the valve core seat is communicated with the movable axial purified water; the water sealing cover is arranged on the upper opening of the water guide cavity and is sealed, the valve rod is in sliding fit with the valve rod hole of the water sealing cover, the valve core is matched with the valve core seat, and the pressure spring is arranged between the top circular disc of the valve rod and the water sealing seat; the upper end of the water guide seat is inserted into the bottom cover part of the knob, the base is connected with the lower end of the shell, the cylindrical driving part of the knob is in rotating fit and sealing with the sleeve of the shell, and the bottom cover part is in liquid sealing with the top plate of the shell; the driving component is arranged in the cylindrical driving part of the knob and is matched with the valve rod; the drive assembly rotates along with the knob, and the drive assembly is in sliding fit with the top of the valve rod.

The two water route ammonium key case that life water and pure water moved alone, its special character lies in: the valve core is attached to the valve core seat, the domestic water is conducted, and the purified water is shut off; the valve core is separated from the valve core seat, the domestic water is conducted, and the purified water is normally conducted.

The two water route ammonium key case that life water and pure water moved alone, its special character lies in: the central angle of the radial central line of the cold water hole and the hot water hole of the movable ceramic piece is larger than that of the radial central line of the cold water guide hole and the hot water guide hole of the static ceramic piece;

the movable ceramic plate rotates to discharge water according to the sequence of cold water, cold-hot mixed water and hot water.

The two water route ammonium key case that life water and pure water moved alone, its special character lies in: the living water guide holes on the static ceramic plate are gradually increased from bottom to top in the clockwise or anticlockwise direction.

The two water route ammonium key case that life water and pure water moved alone, its special character lies in: the guide hole of the cylindrical driving part of the knob is provided with an axial guide groove, the inner wall of the cylindrical driving part of the knob is provided with a plurality of teeth, a deep axial groove is formed by a gap between two adjacent teeth, and the teeth are provided with a shallow axial groove and a spiral surface positioned on one side of the lower end; the deep axial groove and the shallow axial groove are respectively opposite to the axial guide groove;

the driving assembly comprises a button, a driven member and a return spring;

the button comprises a hollow sliding body part with a lower opening, a driving tooth arranged at the lower part of the outer circumferential surface of the sliding body part and an axial guide rail with the lower end connected with the driving tooth, and the lower end of the driving tooth is angular;

the driven part comprises a circular bottom plate, a sliding cavity with an upper opening arranged on the circular bottom plate and driven teeth arranged on the circular seat plate and surrounding the sliding cavity, and the upper ends of the driven teeth are provided with driven spiral surfaces;

the reset spring is arranged in the sliding cavity, the sliding cavity is arranged in the sliding body part and is in sliding fit, the upper end of the reset spring is matched with the top of the sliding body part, the driving teeth are matched with the driven teeth, and the driven teeth are matched with the teeth; the sliding body part of the button penetrates through the guide hole to extend out of the knob, the axial guide rail is in sliding fit with the axial guide groove, the circular bottom plate is in sliding fit with the disc at the top of the valve rod in a relative mode, and the driven piece drives the valve rod to move axially.

The two water route ammonium key case that life water and pure water moved alone, its special character lies in: also comprises a round ball which is provided with a round ball,

a circular cavity with an upper opening is arranged on the disc at the top of the valve rod;

the round bottom plate is provided with a round hole with a lower opening;

the round ball is arranged in the round cavity and extends out of the round cavity, the round ball is in running fit with the lower end of the round hole, and a gap is reserved between the round bottom plate and the round disc at the top of the valve rod.

The two water route ammonium key case that life water and pure water moved alone, its special character lies in: the upper end of the sliding body part of the button is provided with a connecting part, and an internal thread connecting sleeve is arranged in the connecting part;

the reset spring is in a cone frustum shape;

the buffer ball is arranged at the top of the return spring and matched with the lower end of the internal thread connecting sleeve.

According to the double-water-path ammonium key valve core for independently operating the domestic water and the purified water, due to the adoption of the structure, the modes of cold water, mixed water and hot water can be realized by rotating the knob regardless of the conduction or the closing of the purified water path; the life water path and the pure water path are mutually independent and do not interfere with each other.

Drawings

Fig. 1 is a cross-sectional view of the present invention.

Fig. 2 is a view a-a of fig. 1.

Fig. 3 is a perspective view of the present invention.

Fig. 4 is a partial exploded perspective view of the present invention.

Fig. 5 is a perspective view showing a closed state in which the movable ceramic plate and the stationary ceramic plate of the present invention are coupled.

Fig. 6 is a perspective view showing an opened state in which the movable ceramic plate and the stationary ceramic plate are coupled according to the present invention.

Fig. 7 is a front view of the moving ceramic plate of the present invention.

Fig. 8 is a perspective view of the moving ceramic plate of the present invention.

Fig. 9 is a front view of the static ceramic plate of the present invention.

Fig. 10 is a perspective sectional view of the ceramic plate of the present invention.

Fig. 11 is one of exploded perspective views of the present invention.

Fig. 12 is a second exploded perspective view of the present invention.

Fig. 13 is a third exploded perspective view of the present invention.

Fig. 14 is a fourth exploded perspective view of the present invention.

Fig. 15 is a perspective cross-sectional view of the knob of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in figure 1, the double-water-circuit ammonium key valve core for the independent operation of the domestic water and the purified water comprises a base 1, a shell 2, a static ceramic piece 3, a movable ceramic piece 4, a water guide seat 5, a water sealing cover 6, a valve rod 7, a valve core 71, a knob 8 and a driving component 9,

the base 1 is provided with a cold water inlet hole 1A, a hot water inlet hole 1B, a domestic water outlet hole 1C and a pure water hole 1D,

the housing 2 has a lower opening, the housing 2 includes a sleeve 21 provided on a top plate and a shell pure water hole 22 provided on a circumferential wall in a radial direction;

as shown in fig. 9 and 10, the static ceramic sheet 3 includes a cold water guiding hole 32, a hot water guiding hole 31, a domestic water guiding hole 33, a static axial purified water hole 34 provided in the center, and a radial water guiding groove 341 provided on the lower surface and communicating with the axial purified water hole, wherein the cold water guiding hole 31, the hot water guiding hole 32, and the domestic water guiding hole 33 are respectively arc-shaped;

as shown in fig. 7 and 8, the movable ceramic plate 4 includes a cold water hole 41, a hot water hole 42, a living water hole 43, a movable axial purified water hole 44 arranged in the center, and an annular water tank 45 arranged on the upper surface, wherein the cold water hole 41, the hot water hole 42 and the living water hole 43 are communicated with the annular water tank 45; the cold water hole 41, the hot water hole 42 and the life water hole 43 are respectively in an arc shape;

the water guide seat 5 comprises a base 51, a water guide cavity 52 arranged on the base, a valve core seat 53 arranged on the base and a plurality of water guide holes 521 arranged on the water guide cavity, the diameter of the water guide cavity 52 is smaller than that of the base 51, and the water guide holes on the valve core seat 53 are communicated with the water guide cavity 52;

the knob 8 comprises a cylindrical driving part 81 with a lower opening and a bottom cover part 82, and a guide hole 811 is arranged on the top plate of the cylindrical driving part 81;

in fig. 1 and 2, the valve core 71 is circular, and the valve core 71 may be in the shape of a circular plate;

the static ceramic plate 3 is embedded in the base and connected together, the cold water guide hole 31, the hot water guide hole 32 and the life water guide hole 33 are respectively communicated with the cold water inlet hole 1A, the hot water inlet hole 1B and the life water outlet hole 1C, and the radial water guide groove 341 is communicated with the pure water hole 1D; the movable ceramic plate 4 is arranged on the static ceramic plate 3, and the movable axial pure water hole 44 is communicated with the static axial pure water hole 34; the water guide seat 5 is arranged on the movable ceramic plate 4 and connected together, and the valve core seat 53 is communicated with the movable axial pure water 44; the water sealing cover 6 is arranged on the upper opening of the water guide cavity 52 and is sealed, the valve rod 7 is in sliding fit with a valve rod hole of the water sealing cover 6, the valve core 71 is matched with the valve core seat 53, the pressure spring 72 is arranged between the top disc 73 of the valve rod 7 and the water sealing seat 6, and the upper end and the lower end of the pressure spring are respectively matched with an upper spring seat on the top disc 73 and a lower spring seat on the water sealing seat 6; the upper end of the water guide cavity 52 of the water guide seat 5 is inserted into the bottom cover part 82 of the knob 8 and connects the water sealing cover 6 with the water guide seat 5, the base 1 is connected with the lower end of the shell 2, a gap between the water guide cavity 5 and the shell 2 forms a pure water cavity, the shell pure water hole 22, the pure water cavity, the water guide hole 521 and the valve core seat 53 are sequentially communicated, the cylindrical driving part 81 of the knob 8 is in running fit and sealing with the sleeve 21 of the shell 2, and the bottom cover part 82 is in running fit and liquid sealing with the top plate of the shell 2; the driving assembly 9 is arranged in the cylindrical driving part 81 of the knob 8 and is matched with the valve rod 7; the drive assembly 9 rotates with the knob 8 and the drive assembly 9 is in sliding engagement with the top of the valve stem 7. The movable ceramic plate 4, the water guide seat 5, the water sealing cover 6 and the knob 8 rotate together; the drive assembly 9 moves the valve stem 7 along the axis;

the life waterway is normally open, namely the life waterway is communicated by rotating the knob 8 and is irrelevant to the matching state of the valve core 71 and the valve core seat 53; the valve core 71 is attached to the valve core seat 53, so that the domestic water is conducted, and the purified water is shut off; as shown in fig. 1 and 2, the valve core 71 is separated from the valve core seat 53, the domestic water is conducted, and the purified water is normally conducted; the shell pure water hole 22, the pure water cavity, the water guide hole 521, the valve core seat 53 and the moving axial pure water hole 44 are sequentially communicated with the static axial pure water hole 34, the radial water guide groove 341 and the seat pure water hole 1D, and the living water channel and the pure water channel are respectively independent and do not interfere with each other;

the valve core seat 53, the axial pure water hole 44, the static axial pure water hole 34, the radial water chute 341 and the seat pure water hole 1D are always in a communicating state.

As shown in fig. 5, 7 and 9, a central angle α of radial central lines of the cold water hole 41 and the hot water hole 42 of the movable ceramic plate 4 is greater than a central angle β of radial central lines of the cold water guide hole 31 and the hot water guide hole 32 of the stationary ceramic plate 3;

as shown in fig. 3, 5 and 6, in the state of fig. 3, the counterclockwise rotating knob 8, the water sealing cover 6, the water guide seat 5 and the movable ceramic plate 4 rotate together, the movable ceramic plate 4 rotates counterclockwise, and the cold water hole 41 is firstly communicated with the cold water guide hole 31; then, the rotation is continued, the cold water hole 41 is communicated with the cold water guide hole 31, and the hot water hole 42 is communicated with the hot water guide hole 32; continuing to rotate, the cold water hole 41 is staggered with the cold water guide hole 31, the hot water hole 42 is communicated with the hot water guide hole 32, and water is discharged according to the sequence of cold water, cold-hot mixed water and hot water;

as shown in fig. 7, 8, 9 and 10, the cold water hole 41 and the hot water hole 42 are interchanged, the cold water guide hole 31 and the hot water guide hole 32 are interchanged, and the knob 8 is rotated clockwise to discharge the cold water, the cold and hot mixed water and the hot water in this order.

As shown in fig. 9 and 10, the living water guide holes 33 in the ceramic plate 3 gradually increase from bottom to top in a clockwise or counterclockwise direction.

As shown in fig. 15, the guide hole 811 of the cylindrical driving portion 81 of the knob 8 is provided with an axial guide groove 812, the inner wall is provided with a plurality of teeth 83, the gap between two adjacent teeth 83 forms a deep axial groove 84, and the teeth 83 are provided with a shallow axial groove 831 and a helicoid 832 positioned at the lower end side; the deep axial grooves 83 and the shallow axial grooves 831 are opposed to the axial guide grooves 812, respectively; the spiral face 832 is a guiding stop notch at the lower end of the tooth 83, and the top of the guiding stop notch is provided with the spiral face 832

The driving assembly 9 comprises a button 91, a follower 92 and a return spring 93;

the button 91 comprises a hollow sliding body part 911 with a lower opening, a driving tooth 912 arranged at the lower part of the outer circumferential surface of the sliding body part and an axial guide rail 913 with the lower end connected with the driving tooth, wherein the lower end of the driving tooth 912 is angular;

the driven piece 92 comprises a circular base plate 921, a sliding cavity 922 arranged on the circular base plate and provided with an upper opening, and driven teeth 923 arranged on the circular base plate and surrounding the sliding cavity, wherein the upper ends of the driven teeth 923 are provided with driven helicoids; in the figure, there are eight of drive teeth 912 and four of driven teeth 923, with drive teeth 912 being a multiple of driven teeth 923;

the return spring 93 is arranged in the sliding cavity 922, the sliding cavity 922 is arranged in the sliding body part 911 and is in sliding fit with the sliding body part 911, the upper end of the return spring 93 is matched with the top of the sliding body part 911, the driving teeth 912 are matched with the driven teeth 923, the driven teeth 923 are matched with the teeth 83, and the driven teeth 923 are in sliding fit with the spiral surface 832 and are stopped; the sliding body 911 of the push-button 91 extends out of the knob 2 through the guide hole 811, the axial guide rail 913 is in sliding fit with the axial guide groove 812, the circular base plate 921 is in sliding fit with the disc 73 on the top of the valve stem 7, and the follower 92 drives the valve stem 7 to move axially;

the invention is further improved as follows: also included is a ball 10 which is,

a circular cavity 731 with an upper opening is arranged on the disc 73 at the top of the valve rod 7;

a round hole 9211 with a lower opening or a spherical curved hole is arranged on the round bottom plate 921;

the ball 10 is arranged in the circular cavity 731 and extends out of the circular cavity 731, the ball 10 is in rotating fit with the lower end of the circular hole 9211, and a gap is formed between the circular bottom plate 921 and the disc 73 at the top of the valve rod 7; the follower 92 rotates relative to the valve stem 7.

The upper end of the sliding body 911 of the button 91 is provided with a connecting part 914, and an internal thread connecting sleeve 11 is arranged in the connecting part 914;

the return spring 93 is in a cone frustum shape, or the return spring 93 is in a tower shape;

the buffer ball 12 is arranged at the top of the return spring 93 and matched with the lower end of the internal thread connecting sleeve 11.

As shown in fig. 1 and 2, when the valve core 71 is separated from the valve core seat 54 and the pure water path is in the conducting state, the driven teeth 923 are located in the deep axial grooves 84; in the separated state, the button 91 is pressed, the button 91 moves downwards, the driving teeth 912 drive the driven teeth 923, the driven member 92 rotates, the driven teeth 923 enter the spiral surface 832, and then the operation is stopped; meanwhile, the valve rod 7 and the valve core 71 move downwards, the lower end of the valve rod 7 is inserted into a water guide hole of the valve core seat 53, and the valve core 71 is attached to the upper end of the valve core seat 53 to be in a closed state, namely a pure water path closed state;

in the pure water path closed state, the button 91 is pressed again, the follower 92 continues to rotate, and the follower teeth 923 enter the next deep axial groove 84. When the pure water path on state and the pure water path off state are switched, only the button 91 needs to be pressed, and the switching is convenient.

What has been described above is merely a preferred embodiment of the present invention. It should be noted that a person skilled in the art could make several modifications and variations without departing from the principle of the present invention, which should also be regarded as the protection scope of the present invention.