阅读说明：本技术 一种带有凸轮的水路切换机构及应用其的出水终端 (Waterway switching mechanism with cam and water outlet terminal applying same ) 是由 苏恭贺 黄习 肖小娟 田莲莲 胡家洪 于 2021-07-01 设计创作，主要内容包括：本发明公开了一种带有凸轮的水路切换机构及应用其的出水终端,该水路切换机构包括：本体,包括进水通道、与进水通道连通的进水腔、至少两个出水通道、对应与出水通道连通的至少两个出水腔、切换腔,切换腔的侧壁设有贯穿的进水孔和至少两个出水孔,切换腔通过进水孔连通进水腔,切换腔通过出水孔连通与该出水孔对应的出水腔；切换轴,滑动设置在切换腔内用以控制进水孔与各个出水孔的连通或切断；凸轮,转动设于本体内并与切换轴相配合以带动切换轴滑动；驱动件,活动设于本体并带动凸轮转动。本发明的水路切换机构结构简单、紧凑,容易对切换动作进行合理设计。(The invention discloses a waterway switching mechanism with a cam and a water outlet terminal applying the same, wherein the waterway switching mechanism comprises: the body comprises a water inlet channel, a water inlet cavity communicated with the water inlet channel, at least two water outlet channels, at least two water outlet cavities correspondingly communicated with the water outlet channels and a switching cavity, wherein a water inlet hole and at least two water outlet holes which penetrate through the side wall of the switching cavity are formed in the side wall of the switching cavity, the switching cavity is communicated with the water inlet cavity through the water inlet hole, and the switching cavity is communicated with the water outlet cavity corresponding to the water outlet hole through the water outlet hole; the switching shaft is arranged in the switching cavity in a sliding mode and used for controlling the connection or disconnection of the water inlet holes and the water outlet holes; the cam is rotatably arranged in the body and is matched with the switching shaft to drive the switching shaft to slide; the driving piece is movably arranged on the body and drives the cam to rotate. The waterway switching mechanism has simple and compact structure, and is easy to reasonably design the switching action.)

1. A waterway switching mechanism with a cam is characterized by comprising:

the body comprises a water inlet channel, a water inlet cavity communicated with the water inlet channel, at least two water outlet channels, at least two water outlet cavities correspondingly communicated with the water outlet channels and a switching cavity, wherein a water inlet hole and at least two water outlet holes are formed in the side wall of the switching cavity in a penetrating mode, the switching cavity is communicated with the water inlet cavity through the water inlet hole, and the switching cavity is communicated with the water outlet cavity corresponding to the water outlet hole through the water outlet hole;

the switching shaft is arranged in the switching cavity in a sliding mode and used for controlling the connection or disconnection of the water inlet holes and the water outlet holes;

the cam is rotatably arranged in the body and is matched with the switching shaft to drive the switching shaft to slide;

the driving piece is movably arranged on the body and drives the cam to rotate.

2. The waterway switching mechanism of claim 1, wherein the switching shaft is provided with a first sealing portion, a switching sealing portion and a second sealing portion at intervals in the axial direction, the first sealing portion, the switching sealing portion and the second sealing portion are respectively in dynamic sealing engagement with the inner wall of the switching chamber, a sealing cavity is enclosed among the first sealing part, the second sealing part and the inner wall of the switching cavity, the switching sealing part divides the sealing cavity into a water passing cavity and a water isolating cavity, in the sliding process of the switching shaft, the water inlet hole and the water outlet hole are always communicated with the sealing cavity, and the water inlet hole is always communicated with the water passing cavity, the water outlet hole is communicated with the water passing cavity to discharge water, when the water outlet hole is communicated with the water-resisting cavity, water is stopped, and the first sealing part and the water pressure acting force applied to the switching sealing part are offset to balance the water pressure applied to the switching shaft.

3. The waterway switching mechanism of claim 1, wherein the body comprises a diversion plate and a cover plate, the front surface of the diversion plate and the cover plate are in sealing fit to enclose the water inlet cavity and the water outlet cavity which are not communicated with each other, a diversion pipe is arranged on the back surface of the diversion plate, an inner cavity of the diversion pipe forms the switching cavity, and the water inlet hole and the water outlet hole are penetratingly arranged on the diversion plate.

4. The waterway switching mechanism of claim 2, wherein the switch chambers include a first switch chamber and a second switch chamber, the switching shaft comprises a first switching shaft arranged in the first switching cavity and a second switching shaft arranged in the second switching cavity, the cam is provided with one cam and is respectively in transmission fit with the first switching shaft and the second switching shaft, the water inlet hole comprises a first water inlet hole communicated with the first switching cavity and a second water inlet hole communicated with the second switching cavity, the water outlet cavity comprises a first water outlet cavity and a second water outlet cavity, correspondingly, the outlet channel comprises a first outlet channel and a second outlet channel, and the water outlet hole comprises a first water outlet hole communicated with the first switching cavity and the first outlet cavity and a second water outlet hole communicated with the second switching cavity and the second outlet cavity.

5. The waterway switching mechanism of claim 4, wherein the outlet chambers further include a third outlet chamber, and correspondingly, the outlet passage includes a third outlet passage, the outlet holes further include a third outlet hole communicating the first switching chamber and the third outlet chamber, and the first inlet hole, the first outlet hole and the third outlet hole are disposed on the chamber wall of the first switching chamber at intervals along the sliding direction of the first switching shaft.

6. The waterway switching mechanism of claim 5, wherein the outlet chambers further include a fourth outlet chamber, and correspondingly, the outlet passages further include a fourth outlet passage, the outlet holes further include a fourth outlet hole communicating the second switching chamber and the fourth outlet chamber, and the second inlet hole, the second outlet hole and the fourth outlet hole are disposed on the chamber wall of the second switching chamber at intervals along the sliding direction of the second switching shaft.

7. The waterway switching mechanism of claim 5,

the first switching shaft and the second switching shaft are symmetrically arranged on two sides of the cam;

when the convex part of the cam is matched with the inner end of the first switching shaft, the back part of the cam, which faces away from the convex part, is matched with the inner end of the second switching shaft, the first switching shaft and the second switching shaft are respectively positioned at respective first positions, at the moment, the first water inlet hole, the first water outlet hole and the third water outlet hole are communicated with the water passing cavity so as to enable the first water outlet channel and the third water outlet channel to discharge water, and the second water outlet hole is communicated with the water resisting cavity so as to enable the second water outlet channel not to discharge water;

when two side parts of two sides of the convex part of the cam are respectively matched with the inner ends of the first switching shaft and the second switching shaft, the first switching shaft and the second switching shaft are respectively positioned at respective second positions, at the moment, the first water inlet hole and the first water outlet hole are communicated with the water passing cavity to enable the first water outlet channel to discharge water, and the second water outlet hole and the third water outlet hole are respectively communicated with the corresponding water isolating cavities to enable the second water outlet channel and the third water outlet channel to stop discharging water;

when the convex part of the cam is matched with the inner end of the second switching shaft, the back part of the cam, which faces away from the convex part, is matched with the inner end of the first switching shaft, the first switching shaft and the second switching shaft are respectively positioned at respective third positions, at the moment, the first water inlet hole is communicated with the water passing cavity, the first water outlet hole and the third water outlet hole are communicated with the corresponding water isolating cavity so as to enable the first water outlet channel and the third water outlet channel not to discharge water, and the second water outlet hole is communicated with the corresponding water passing cavity so as to enable the second water outlet channel to discharge water.

8. The waterway switching mechanism of claim 4, further comprising a first elastic member and a second elastic member, the first elastic member applying an elastic force to the first switching shaft in a direction toward the cam; the second elastic member applies an elastic force in a direction toward the cam to the second switching shaft.

9. The waterway switching mechanism of claim 4, wherein the cam is provided with a track groove extending along the circumferential direction, the inner ends of the first switching shaft and the second switching shaft are provided with sliding columns, the sliding columns are positioned in the track groove to slide, and when the cam rotates, the first switching shaft and the second switching shaft are driven to slide back and forth through the matching of the sliding columns and the track groove.

10. The waterway switching mechanism of claim 2, wherein the first sealing portion, the switching sealing portion and the second sealing portion are respectively provided with a Y-shaped sealing ring; the driving piece is a knob, the knob is in rotating transmission fit with the cam, and a gear positioning structure is arranged between the knob or the cam and the body.

11. A water outlet terminal, comprising the waterway switching mechanism with cam according to any one of claims 1 to 10.

Technical Field

The invention relates to a waterway switching mechanism with a cam and a water outlet terminal applying the same.

Background

The prior shower head is usually provided with a waterway switching mechanism, and the communication or the cut-off of the water inlet channel and each water outlet channel is controlled by switching the waterway switching mechanism, so that the water outlet of different water outlet channels is controlled, and different spray modes are realized. The switching valve core of the prior art waterway switching mechanism has various structures, for example, the switching valve core adopts a switching disk, a switching shaft or a switching sheet. The existing shaft-switching waterway switching mechanism is complex, not compact enough in structure and occupies a large space inside the shower head.

Disclosure of Invention

In view of the above, the present invention provides a waterway switching mechanism with a cam and a water outlet terminal using the same.

In order to achieve the purpose, the invention provides the following technical scheme:

a waterway switching mechanism with a cam, comprising:

the body comprises a water inlet channel, a water inlet cavity communicated with the water inlet channel, at least two water outlet channels, at least two water outlet cavities correspondingly communicated with the water outlet channels and a switching cavity, wherein a water inlet hole and at least two water outlet holes are formed in the side wall of the switching cavity in a penetrating mode, the switching cavity is communicated with the water inlet cavity through the water inlet hole, and the switching cavity is communicated with the water outlet cavity corresponding to the water outlet hole through the water outlet hole;

the switching shaft is arranged in the switching cavity in a sliding mode and used for controlling the connection or disconnection of the water inlet holes and the water outlet holes; the cam is rotatably arranged in the body and is matched with the switching shaft to drive the switching shaft to slide;

the driving piece is movably arranged on the body and drives the cam to rotate.

The water inlet cavity, the water outlet cavity and the switching cavity are arranged in the body, the side wall of the switching cavity is provided with the water inlet hole and the water outlet hole which penetrate through the water inlet cavity, the switching cavity is communicated with the water inlet cavity through the water inlet hole, and the switching cavity is communicated with the water outlet cavity corresponding to the water outlet hole through the water outlet hole. In addition, the cam is adopted to drive the switching shaft, and the structure is simple.

According to the preferable scheme, a first sealing part, a switching sealing part and a second sealing part which are respectively in dynamic sealing fit with the inner wall of the switching cavity are sequentially arranged on the switching shaft at intervals along the axial direction, a sealing cavity is defined among the first sealing part, the second sealing part and the inner wall of the switching cavity, the switching sealing part divides the sealing cavity into a water passing cavity and a water isolating cavity, the water inlet hole and the water outlet hole are always communicated with the sealing cavity in the sliding process of the switching shaft, the water inlet hole is always communicated with the water passing cavity, water is discharged when the water outlet hole is communicated with the water passing cavity, water is stopped when the water outlet hole is communicated with the water isolating cavity, and the water pressure acting force borne by the first sealing part and the switching sealing part is offset to balance the water pressure borne by the switching shaft.

In the above scheme, the first sealing part and the water pressure acting force received by the switching sealing part are offset to balance the water pressure received by the switching shaft, so that the problem of position deviation of the switching shaft when the water pressure is high can be avoided, the driving force for driving the switching shaft is small, and the acting force of the water pressure does not need to be overcome.

As a preferred scheme, the body comprises a water diversion plate and a cover plate, the front surface of the water diversion plate is in sealing fit with the cover plate to form the water inlet cavity and the water outlet cavity which are not communicated with each other, a water diversion pipe is arranged on the back surface of the water diversion plate, the inner cavity of the water diversion pipe forms the switching cavity, and the water inlet hole and the water outlet hole are penetratingly arranged on the water diversion plate.

In the above scheme, the front surface of the water diversion plate is used for forming the water outlet cavity, the back surface of the water diversion plate is used for forming the switching cavity, the water inlet hole is penetratingly arranged on the water diversion plate to be communicated with the water inlet cavity and the switching cavity, and the water outlet hole is penetratingly arranged on the water diversion plate to be communicated with the water outlet cavity and the switching cavity.

As a preferred scheme, the switching cavity includes a first switching cavity and a second switching cavity, the switching shaft includes a first switching shaft disposed in the first switching cavity and a second switching shaft disposed in the second switching cavity, the cam is provided with one and is in transmission fit with the first switching shaft and the second switching shaft, the water inlet includes a first water inlet communicated with the first switching cavity and a second water inlet communicated with the second switching cavity, the water outlet includes a first water outlet cavity and a second water outlet cavity, correspondingly, the water outlet includes a first water outlet channel and a second water outlet channel, and the water outlet includes a first water outlet hole communicated with the first switching cavity and the first water outlet cavity and a second water outlet hole communicated with the second switching cavity and the second water outlet cavity.

In the above-mentioned scheme, through setting up two switching chambeies and two switching shafts for it is more nimble various to switch the action design, satisfies the switching requirement of multiple play water mode.

As a preferable scheme, the water outlet chamber further includes a third water outlet chamber, correspondingly, the water outlet passage includes a third water outlet passage, the water outlet hole further includes a third water outlet hole communicating the first switching chamber and the third water outlet chamber, and the first water inlet hole, the first water outlet hole, and the third water outlet hole are arranged on the chamber wall of the first switching chamber at intervals along the sliding direction of the first switching shaft.

As a preferred scheme, the water outlet cavity further includes a fourth water outlet cavity, correspondingly, the water outlet channel further includes a fourth water outlet channel, the water outlet hole further includes a fourth water outlet hole communicating the second switching cavity and the fourth water outlet cavity, and the second water inlet hole, the second water outlet hole and the fourth water outlet hole are arranged on the cavity wall of the second switching cavity at intervals along the sliding direction of the second switching shaft.

Preferably, the first switching shaft and the second switching shaft are symmetrically arranged on both sides of the cam;

when the convex part of the cam is matched with the inner end of the first switching shaft, the back part of the cam, which faces away from the convex part, is matched with the inner end of the second switching shaft, the first switching shaft and the second switching shaft are respectively positioned at respective first positions, at the moment, the first water inlet hole, the first water outlet hole and the third water outlet hole are communicated with the water passing cavity so as to enable the first water outlet channel and the third water outlet channel to discharge water, and the second water outlet hole is communicated with the water resisting cavity so as to enable the second water outlet channel not to discharge water;

when two side parts of two sides of the convex part of the cam are respectively matched with the inner ends of the first switching shaft and the second switching shaft, the first switching shaft and the second switching shaft are respectively positioned at respective second positions, at the moment, the first water inlet hole and the first water outlet hole are communicated with the water passing cavity to enable the first water outlet channel to discharge water, and the second water outlet hole and the third water outlet hole are respectively communicated with the corresponding water isolating cavities to enable the second water outlet channel and the third water outlet channel to stop discharging water;

when the convex part of the cam is matched with the inner end of the second switching shaft, the back part of the cam, which faces away from the convex part, is matched with the inner end of the first switching shaft, the first switching shaft and the second switching shaft are respectively positioned at respective third positions, at the moment, the first water inlet hole is communicated with the water passing cavity, the first water outlet hole and the third water outlet hole are communicated with the corresponding water isolating cavity so as to enable the first water outlet channel and the third water outlet channel not to discharge water, and the second water outlet hole is communicated with the corresponding water passing cavity so as to enable the second water outlet channel to discharge water.

In the scheme, the three gear positions of the cam are designed to realize the 3-middle water outlet mode, namely the mode that the first water outlet channel and the third water outlet channel simultaneously discharge water, the mode that only the first water outlet channel discharges water and the mode that only the second water outlet channel discharges water.

Preferably, the switching device further includes a first elastic member and a second elastic member, the first elastic member applying an elastic force to the first switching shaft in a direction toward the cam; the second elastic member applies an elastic force in a direction toward the cam to the second switching shaft.

In the above scheme, make first switching shaft and second switching shaft can realize reciprocating sliding through first elastic component and second elastic component, simple structure, the function is reliable.

Preferably, the cam is provided with a track groove extending along the circumferential direction, sliding posts are arranged at the inner ends of the first switching shaft and the second switching shaft, the sliding posts are located in the track groove to slide, and when the cam rotates, the first switching shaft and the second switching shaft are driven to slide in a reciprocating manner through the cooperation of the sliding posts and the track groove.

In the scheme, the reciprocating sliding of the first switching shaft and the second switching shaft can be realized through the matching of the sliding column and the track groove, and the device is simple in structure and reliable in function.

Preferably, the first sealing part, the switching sealing part and the second sealing part are respectively provided with a Y-shaped sealing ring; the driving piece is a knob, the knob is in rotating transmission fit with the cam, and a gear positioning structure is arranged between the knob or the cam and the body.

The invention also provides a water outlet terminal, which comprises the waterway switching mechanism with the cam.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of a top shower head according to a first embodiment of the present invention;

FIG. 2 is an exploded view of the top shower in accordance with the first embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 4 is a perspective view of the switching shaft of the first embodiment of the present invention;

FIG. 5 is a perspective view of a cam in accordance with a first embodiment of the present invention;

fig. 6 is a schematic front view of a water distribution plate according to a first embodiment of the present invention;

fig. 7 is a schematic rear view of a water distribution plate according to a first embodiment of the present invention;

fig. 8 is a perspective view of a cover plate according to a first embodiment of the present invention;

FIG. 9 is a schematic view of the cam, the water diversion plate and the switching shaft according to the first embodiment of the present invention, wherein the cam is at the first gear, and the first water outlet passage and the third water outlet passage discharge water;

FIG. 10 is a cross-sectional view taken along line A-A of FIG. 9;

FIG. 11 is a schematic view of the cam, the water diversion plate and the switching shaft according to the first embodiment of the present invention, wherein the cam is in the second gear and the first water outlet channel is discharging water;

FIG. 12 is a sectional view taken along the line A-A in FIG. 11;

FIG. 13 is a schematic view of the cam, the water diversion plate and the switching shaft in accordance with the first embodiment of the present invention, wherein the cam is in the third gear position and the third water outlet channel is discharging water;

FIG. 14 is a cross-sectional view taken along line A-A of FIG. 13;

FIG. 15 is a cross-sectional view taken in the direction B-B of FIG. 13;

FIG. 16 is a perspective view of a cam in accordance with a second embodiment of the present invention;

FIG. 17 is a front view of a cam in accordance with a second embodiment of the present invention;

fig. 18 is a perspective view of a switching shaft of the second embodiment of the present invention;

FIG. 19 is a schematic rear view of a water distribution plate according to a second embodiment of the present invention;

fig. 20 is a sectional view of a top shower in accordance with a second embodiment of the present invention.

The reference signs are:

10-a body; 11-a water inlet channel; 121-a first water outlet channel; 122-a second water outlet channel; 123-a third water outlet channel; 13-water inlet cavity; 141-a first outlet chamber; 142-a second outlet chamber; 143-third outlet chamber; 151-first switching chamber; 152-a second switching chamber; 161-a first water inlet hole; 162-a second water inlet; 171-a first water outlet; 172-second water outlet; 173-a third water outlet; 18-a water diversion plate; 181-guide ribs; 19-a cover plate; 110-a first water outlet nozzle, 120-a second water outlet nozzle; 130-a third water outlet nozzle;

20-switching shaft; 20 a-a first switching shaft; 20 b-a second switching shaft; 21-a first seal; 22-switching seal; 23-a second seal; 24-a guide chute; 25-a strut;

30-a cam; 31-a convex portion; 32-back; 33-lateral part; 34-track groove

40-a driver;

51-a first elastic member; 52-a second elastic member;

gear location structure: 61-a spring pin; 62-positioning groove.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 15, a waterway switching mechanism with a cam according to a first embodiment of the present invention includes a body 10, a switching shaft 20, a cam 30, and a driving member 40. The present embodiment will be described in detail by taking an example in which the water path switching mechanism is applied to a shower head, but the water path switching mechanism of the present invention may be applied to other water outlet terminals, such as a faucet.

The body 10 comprises a water inlet channel 11, a water inlet cavity 13 communicated with the water inlet channel 11, at least two water outlet channels, at least two water outlet cavities correspondingly communicated with the water outlet channels, and a switching cavity. The lateral wall that switches the chamber is equipped with inlet opening and two at least apopores that run through, switches the chamber and passes through inlet opening intercommunication inlet chamber 13, switches the chamber and passes through the apopore intercommunication and the play water cavity that corresponds with this apopore. The switching shaft 20 is arranged in the switching cavity in a sliding manner and used for controlling the connection or disconnection of the water inlet and each water outlet; the cam 30 is rotatably disposed in the body 10 and cooperates with the switching shaft 20 to slide the switching shaft 20. The driving member 40 is movably disposed on the body 10 and drives the cam 30 to rotate.

Through set up intake antrum 13, play water cavity and switching chamber in body 10, and set up inlet opening and the apopore that runs through at the lateral wall that switches the chamber, switch the chamber and communicate intake antrum 13 through the inlet opening, switch the chamber and communicate the play water cavity that corresponds with this apopore through the apopore, like this when switching axle 20 moves about to the inlet opening and communicates with each other with the apopore in switching the chamber, this apopore can go out water, when switching axle 20 moves about to the inlet opening and does not communicate with each other with the apopore in switching the chamber, this apopore promptly does not go out water, thereby easily carry out reasonable design to the switching action, and simple structure, compactness. In addition, the cam 30 is adopted to drive the switching shaft 20, and the structure is simple.

Referring to fig. 2 to 4, in the present embodiment, the switching shaft 20 is sequentially provided with a first sealing portion 21, a switching sealing portion 22 and a second sealing portion 23 at intervals along the axial direction, which are respectively in dynamic sealing engagement with the inner wall of the switching cavity. A sealed cavity is enclosed among the first sealing part 21, the second sealing part 23 and the inner wall of the switching cavity, the switching sealing part 22 divides the sealed cavity into a water passing cavity and a water isolating cavity, the water inlet hole and the water outlet hole are always communicated with the sealed cavity in the sliding process of the switching shaft 20, and the water inlet is always communicated with the water passing cavity, that is, the water passing cavity is communicated with the water inlet in the sealing cavity, the water isolating cavity is arranged on the other sealing cavity, the water outlet is communicated with the water inlet to discharge water when communicated with the water passing cavity, the water outlet is isolated from the water inlet to stop water when communicated with the water isolating cavity, the water pressure acting forces on the first sealing part 21 and the switching sealing part 22 are offset to balance the water pressure on the switching shaft 20, therefore, the problem that the switching shaft 20 runs when the water pressure is large can be solved, the driving force for driving the switching shaft 20 is small, the acting force of the water pressure does not need to be overcome, and the use experience is better.

Referring to fig. 2, 3, 6 and 8, in the present embodiment, the body 10 includes a water diversion plate 18 and a cover plate 19, and the front surface of the water diversion plate 18 and the cover plate 19 are in sealing fit to enclose the water inlet cavity 13 and the water outlet cavity which are not communicated with each other.

Referring to fig. 2, 3 and 7, a water diversion pipe is arranged on the back of the water diversion plate 18, a switching cavity is formed in the inner cavity of the water diversion pipe, and a water inlet hole and a water outlet hole are penetratingly arranged on the water diversion plate 18.

The front surface of the water diversion plate 18 is used for forming a water outlet cavity, the back surface of the water diversion plate 18 is used for forming a switching cavity, a water inlet hole is penetratingly arranged on the water diversion plate 18 to be communicated with the water inlet cavity 13 and the switching cavity, and a water outlet hole is penetratingly arranged on the water diversion plate 18 to be communicated with the water outlet cavity and the switching cavity.

In this embodiment, the switching cavity includes a first switching cavity 151 and a second switching cavity 152, the switching shaft 20 includes a first switching shaft 20a disposed in the first switching cavity 151 and a second switching shaft 20b disposed in the second switching cavity 152, and the two switching shafts have the same structure in this embodiment. The cam 30 is provided with one and is in driving engagement with the first switching shaft 20a and the second switching shaft 20b, respectively, and the water inlet holes include a first water inlet hole 161 communicated with the first switching chamber 151 and a second water inlet hole 162 communicated with the second switching chamber 152. The outlet cavities include a first outlet cavity 141 and a second outlet cavity 142, and correspondingly, the outlet channels include a first outlet channel 121 and a second outlet channel 122, and the outlet holes include a first outlet hole 171 communicating the first switching cavity 151 and the first outlet cavity 141, and a second outlet hole 172 communicating the second switching cavity 152 and the second outlet cavity 142. Through setting up two switching chambers and two switching shafts 20 for it is more nimble various to switch the action design, satisfies the switching requirement of multiple play water mode.

In order to realize the switching control of the three water outlet modes, in this embodiment, the water outlet cavity further includes a third water outlet cavity 143, correspondingly, the water outlet channel includes a third water outlet channel 123, the water outlet holes further include a third water outlet hole 173 communicating the first switching cavity 151 and the third water outlet cavity 143, and the first water inlet hole 161, the first water outlet hole 171, and the third water outlet hole 173 are disposed on the cavity wall of the first switching cavity 151 at intervals along the sliding direction of the first switching shaft 20 a. Of course, in other embodiments, only two outlet modes may be selected, so that the third outlet chamber 143, the third outlet channel 123 and the third outlet hole 173 are not required.

Of course, in order to further increase the switching control of one water outlet mode, so that the top shower has 4 water outlet modes, in an embodiment not shown in the figure, the embodiment can also be designed as follows: the water outlet cavity further includes a fourth water outlet cavity (not shown), correspondingly, the water outlet channel further includes a fourth water outlet channel (not shown), the water outlet holes further include a fourth water outlet hole (not shown) communicating the second switching cavity 152 and the fourth water outlet cavity, and the second water inlet hole 162, the second water outlet hole 172 and the fourth water outlet hole are arranged on the cavity wall of the second switching cavity 152 at intervals along the sliding direction of the second switching shaft 20 b.

Referring to fig. 2 and 3, in order to make the overall structure simpler and more compact, in the present embodiment, the first switching shaft 20a and the second switching shaft 20b are symmetrically arranged on both sides of the cam 30;

referring to fig. 9 and 10, at this time, the cam is located at the first gear position, the protruding portion 31 of the cam 30 is engaged with the inner end of the first switching shaft 20a, the back portion 32 of the cam 30, which is opposite to the protruding portion 31, is engaged with the inner end of the second switching shaft 20b, the first switching shaft 20a and the second switching shaft 20b are located at respective first positions, and at this time, the first water inlet hole 161, the first water outlet hole 171, and the third water outlet hole 173 are all communicated with the water passing cavity to enable the first water outlet channel 121 and the third water outlet channel 123 to discharge water, and the second water outlet hole 172 is communicated with the water blocking cavity to enable the second water outlet channel 122 not to discharge water;

referring to fig. 11 and 12, at this time, the cam is located at the second position, two side portions 33 of two sides of the convex portion 31 of the cam 30 are respectively matched with inner ends of the first switching shaft 20a and the second switching shaft 20b, the first switching shaft 20a and the second switching shaft 20b are respectively located at respective second positions, at this time, the first water inlet 161 and the first water outlet 171 are communicated with the water passing cavity to enable the first water outlet channel 121 to discharge water, and the second water outlet 172 and the third water outlet are respectively communicated with the corresponding water blocking cavities to enable the second water outlet channel 122 and the third water outlet channel 123 not to discharge water;

referring to fig. 13 to 15, at this time, the cam is located at the third position, when the protruding portion 31 of the cam 30 is engaged with the inner end of the second switching shaft 20b, the back portion 32 of the cam 30, which is opposite to the protruding portion 31, is engaged with the inner end of the first switching shaft 20a, the first switching shaft 20a and the second switching shaft 20b are located at respective third positions, at this time, the first water inlet 161 is communicated with the water passing cavity, the first water outlet 171 and the third water outlet 173 are communicated with the corresponding water blocking cavity, so that the first water outlet channel 121 and the third water outlet channel 123 do not discharge water, and the second water outlet 172 is communicated with the corresponding water passing cavity, so that the second water outlet channel 122 discharges water.

The three gear positions of the cam 30 are designed to realize a 3-middle water outlet mode, which is a mode that the first water outlet channel 121 and the third water outlet channel 123 simultaneously discharge water, a mode that only the first water outlet channel 121 discharges water, and a mode that only the second water outlet channel 122 discharges water. Specifically, in this embodiment, the body 10 is provided with a first water outlet nozzle 110 communicated with the first water outlet channel 121, a second water outlet nozzle 120 communicated with the second water outlet channel 122, and a third water outlet nozzle 130 communicated with the third water outlet channel 123, the first water outlet nozzle 110 and the third water outlet nozzle 130 are respectively provided with a plurality of water outlets and arranged in a ring shape, the third water outlet nozzle 130 surrounds the first water outlet nozzle 110, the second water outlet nozzle 120 is provided with two water outlets symmetrically arranged, so that the water flowing out from the first water outlet channel 121 is inner ring flower water, the water flowing out from the third water outlet channel 123 is outer ring flower water, and the water flowing out from the second water outlet channel 122 is two strands of columnar water.

In this embodiment, the first elastic member 51 and the second elastic member 52 are further included, and the first elastic member 51 applies an elastic force against the first switching shaft 20a in the direction of the cam 30; the second elastic member 52 applies an elastic force to the second switching shaft 20b in the direction of the cam 30. The first elastic member 51 and the second elastic member 52 are preferably both compression springs. The first elastic member 51 is elastically urged between the second seal portion 23 on the first switching shaft 20a and the inner wall of the first switching chamber 151; the first elastic member 52 is elastically urged between the second seal portion 23 on the second switching shaft 20b and the inner wall of the second switching chamber 152. The first elastic piece 51 and the second elastic piece 52 enable the first switching shaft 20a and the second switching shaft 20b to slide in a reciprocating mode, and the structure is simple and reliable in function.

In the present embodiment, Y-rings are provided on the first sealing portion 21, the switching sealing portion 22, and the second sealing portion 23, respectively, and the opening of the Y-ring at the first sealing portion 21 is provided toward the switching sealing portion 22, while the opening of the Y-ring at the switching sealing portion 22 and the second sealing portion 23 is provided toward the first sealing portion 21.

In this embodiment, the driving member 40 is a knob disposed at the center of the outlet panel of the top shower head, and the knob is in rotational transmission engagement with the cam 30. In order to make the gear switch more directly perceived, be equipped with gear location structure between knob or cam 30 and the body 10, in this embodiment, gear location structure specifically sets up between knob and apron 19, including bullet round pin 61 and constant head tank 62, and is specific, and bullet round pin 61 sets up on the knob, and constant head tank 62 sets up on apron 19, and when rotating the knob, bullet round pin 61 can be in proper order with constant head tank 62 location fit.

Referring to fig. 16 to 20, a waterway switching mechanism with a cam according to a first embodiment of the present invention is different from the first embodiment in that the first elastic member 51 and the second elastic member 52 are not provided in the present embodiment, the track groove 34 extending along the circumferential direction is provided on the cam 30 when the present embodiment controls the reciprocal sliding of the first switching shaft 20a and the second switching shaft 20b, and the sliding column 25 is provided at the inner ends of the first switching shaft 20a and the second switching shaft 20b, so that the sliding column 25 is located in the track groove 34 to slide. When the cam 30 rotates, the first switching shaft 20a and the second switching shaft 20b are driven to slide back and forth by the cooperation of the sliding column 25 and the track groove 34. The first switching shaft 20a and the second switching shaft 20b can slide back and forth through the matching of the sliding column 25 and the track groove 34, and the structure is simple and the function is reliable.

In order to make the switching shaft slide more smoothly, in this embodiment, a guiding structure is arranged between the switching shaft and the body 10, the guiding structure includes a guiding sliding groove 24 which is arranged on the outer wall of the switching shaft and extends axially, and a guiding rib 181 which is arranged on the back surface of the water diversion plate 18 and extends axially along the switching shaft, and the guiding rib 181 is in relative sliding fit with the guiding sliding groove 24.

The working process of this embodiment is briefly described as follows:

referring to fig. 9 and 10, at this time, the cam is located at the first gear position, the protruding portion 31 of the cam 30 is engaged with the inner end of the first switching shaft 20a, the back portion 32 of the cam 30, which is opposite to the protruding portion 31, is engaged with the inner end of the second switching shaft 20b, the first switching shaft 20a and the second switching shaft 20b are located at respective first positions, and at this time, the first water inlet hole 161, the first water outlet hole 171, and the third water outlet hole 173 are all communicated with the water passing cavity to enable the first water outlet channel 121 and the third water outlet channel 123 to discharge water, and the second water outlet hole 172 is communicated with the water blocking cavity to enable the second water outlet channel 122 not to discharge water;

referring to fig. 11 and 12, in the state of fig. 9 and 10, the cam 30 is rotated 90 degrees clockwise, at this time, the cam 30 is located at the second shift position, two side portions 33 of two sides of the convex portion 31 of the cam 30 are respectively engaged with inner ends of the first switching shaft 20a and the second switching shaft 20b, the first switching shaft 20a moves a small distance leftward, the second switching shaft 20b moves a small distance rightward, the first switching shaft 20a and the second switching shaft 20b are respectively located at respective second positions, at this time, the first water inlet hole 161 and the first water outlet hole 171 are communicated with the water passing cavity so that the first water outlet channel 121 discharges water, and the second water outlet hole 172 and the third water outlet hole 173 are respectively communicated with corresponding water-stop cavities so that the second water outlet channel 122 and the third water outlet channel 123 do not discharge water;

referring to fig. 13 to 15, in the state of fig. 11 and 12, the cam 30 is continuously rotated clockwise by 90 degrees, at which time, when the cam is at the third position and the convex portion 31 of the cam 30 is engaged with the inner end of the second switching shaft 20b, the back portion 32 of the cam 30, which faces away from the protrusion 31, is engaged with the inner end of the first switching shaft 20a, the first switching shaft 20a continues to move leftward a small distance, the second switching shaft 20b continues to move rightward a small distance, the first switching shaft 20a and the second switching shaft 20b are located at respective third positions, and at this time, the first water inlet 161 is communicated with the water passing cavity, the first water outlet 171 and the third water outlet 173 are communicated with the corresponding water isolating cavity, so that the first water outlet channel 121 and the third water outlet channel 123 do not discharge water, and the second water outlet 172 is communicated with the corresponding water passing cavity, so that the second water outlet channel 122 discharges water.

The rest of the structure and the operation principle which are not described in the present embodiment refer to the description related to the above embodiment, and are not described again here.

The invention also provides a water outlet terminal, which comprises the waterway switching mechanism with the cam.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.