Drawing head

Abstract

The utility model provides a drawing head. Comprising a shell cover and further comprises a switching mechanism arranged at the water outlet end of the shell cover and used for switching water outlet modes, and a containing cavity used for internally installing a filter element is defined between the interior of the shell cover and the switching mechanism; the switching mechanism comprises a water inlet cavity seat and a switching seat rotationally mounted at the water outlet end of the water inlet cavity seat, and when the switching seat is shifted to rotate until the first water passing cavity is communicated with the water inlet hole, the drawing head is in a first water outlet mode; and when the switching seat rotates until the second water outlet cavity is communicated with the water inlet hole, the drawing head is in a second water outlet mode. The containing cavity for internally installing the filter element is defined between the shell cover and the switching mechanism, switching of water channels in the drawing head is achieved through a mechanical mode that the switching mechanism below the containing cavity rotates and switches, and therefore miniaturization of the whole structure of the drawing head structure is achieved, and the drawing head structure has the advantages of being simple in structure and convenient and fast to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pull head. BACKGROUND

[0002] The pull head is a switching piece installed at the water outlet end of a faucet for facilitating water use and flushing.

[0003] Most of the pull heads with filter cartridges on the market are assembled and produced by integrating the electronic components required for switching and the filter cartridge in the pull head, which results in a large volume of the pull head, occupies a large space when installed at the water outlet end of the faucet, affects the appearance, and provides a poor user experience. Furthermore, the user needs to reserve a socket for the power supply connection of the pull head on the countertop when installing the pull head, which brings many inconveniences to the user in the actual use. SUMMARY

[0004] The utility model provides a pull head, which can effectively solve the above problems.

[0005] The utility model is implemented as follows:

[0006] The pull head comprises a shell cover and a switching mechanism arranged at the water outlet end of the shell cover for switching the water outlet mode, and a containing cavity for the built-in installation of the filter cartridge is formed between the inside of the shell cover and the switching mechanism.

[0007] The switching mechanism comprises a water inlet cavity seat and a switching seat rotatably installed at the water outlet end of the water inlet cavity seat, the water inlet cavity seat has a plurality of water inlet holes communicating with the containing cavity, the switching seat is spaced apart in the rotation direction and has a first water passing cavity and a second water passing cavity for independent water outlet, when the switching seat is rotated to the first water passing cavity to communicate with the water inlet hole, the pull head is in the first water outlet mode; when the switching seat is rotated to the second water passing cavity to communicate with the water inlet hole, the pull head is in the second water outlet mode.

[0008] As a further improvement, the water inlet cavity seat has a mounting hole at the top surface for the insertion of the tail part of the filter cartridge, the inside of the filter cartridge inserted into the mounting hole communicates with the water inlet hole; a first sealing ring in sealing connection with the mounting hole is sleeved on the tail part of the filter cartridge; a second sealing ring in sealing contact with the inner wall surface of the shell cover is embedded on the peripheral side of the water inlet cavity seat.

[0009] As a further improvement, a cover ring for connecting the water inlet cavity seat and the shell cover is sleeved on the peripheral side of the switching seat, a top pressing ring groove is formed on the water outlet end side of the water inlet cavity seat, the cover ring protrudes inward on the water inlet end side to form a top pressing ring matched with the top pressing ring groove; a plurality of sliding strips are arranged on the peripheral surface of the cover ring on the water inlet end side, a plurality of convex strips corresponding to the sliding strips are arranged on the inner wall surface of the water outlet end of the shell cover, a sliding groove for the rotation and sliding of the sliding strips is formed on the convex strips, and the adjacent sliding strips are arranged in the avoiding space for avoiding the convex strips.

[0010] As a further improvement, a convex column is arranged at the middle of the water outlet end of the water inlet cavity seat, and the convex column is provided with a mounting groove, and a connecting bolt is inserted into the through hole of the switching seat and is screwed into the mounting groove.

[0011] As a further improvement, a third water passing cavity is arranged on the switching seat and is spaced apart from and independent of the first water passing cavity and the second water passing cavity; and the first water passing cavity, the second water passing cavity and the third water passing cavity are located on the same rotation path of the switching seat.

[0012] As a further improvement, the switching mechanism further comprises a water outlet panel fixed to the water outlet end of the switching seat, and the water outlet panel is provided with a first water outlet hole communicating with the first water passing cavity, a second water outlet hole communicating with the second water passing cavity and a third water outlet hole communicating with the third water passing cavity.

[0013] As a further improvement, a sealing gasket is embedded at the water outlet end of the water inlet hole of the water inlet cavity seat and is in sealing contact with the water inlet end surface of the switching seat.

[0014] As a further improvement, an actuating ring is sleeved on the outside of the switching seat, a plurality of actuating protrusions extending in the axial direction are formed on the peripheral side of the switching seat, an actuating groove is formed on the inner side surface of the actuating ring and is used for inserting and cooperating with the actuating protrusions, an arc segment is formed on the peripheral surface of the actuating ring, and a first limiting segment and a second limiting segment located on the rotation path of the arc segment are arranged on the inner wall of the cover ring in a spaced apart manner; when the actuating ring drives the switching seat to rotate to the second water outlet mode, one end of the arc segment is in contact with the first limiting segment; and when the switching seat rotates to the third water outlet mode, the other end of the arc segment is in contact with the second limiting segment.

[0015] As a further improvement, an operating handle for being held by a hand is screwed in the middle position of the arc segment, and a strip-shaped groove is formed on the cover ring and is used for accommodating the operating handle.

[0016] As a further improvement, a spring pin sliding in the axial direction is arranged on the peripheral side of the actuating ring, and a first positioning groove, a second positioning groove and a third positioning groove for inserting the spring pin are formed on the top pressing ring in a spaced apart manner; when the spring pin is inserted into the first positioning groove, the pull head is in the first water outlet mode; when the spring pin is inserted into the second positioning groove, the pull head is in the second water outlet mode; and when the spring pin is inserted into the third positioning groove, the pull head is in the third water outlet mode.

[0017] The beneficial effects of the utility model are as follows:

[0018] The shell cover and the switching mechanism are enclosed to form a containing cavity for installing the filter element, the switching mechanism is rotated to switch the water path in the pull head in a mechanical mode, the overall structure of the pull head is miniaturized, and the pull head has the advantages of simple structure and convenient use. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the overall structure schematic view of the utility model;

[0020] Figure 2 is the cross section schematic view of the utility model pull head installed with filter element and not installed with filter element;

[0021] Figure 3 is the assembly relationship schematic view of the utility model reflecting the assembly relationship of shell cover and cover mounting ring;

[0022] Figure 4 is the structure schematic view of the utility model pull head in first water outlet mode, second water outlet mode and third water outlet mode;

[0023] Figure 5 is the assembly relationship schematic view of the utility model switching mechanism;

[0024] Figure 6 is the plane schematic view of the utility model switching seat;

[0025] Figure 7 is the cross section schematic view of the utility model Figure 4 A-A;

[0026] Figure 8 is the cross section schematic view of the utility model Figure 4 B-B;

[0027] Figure 9 is the cross section schematic view of the utility model Figure 4 C-C.

[0028] The figure identification is as follows in the drawing:

[0029] 10, shell cover;11, threaded column;12, convex strip;121, sliding groove;101, containing cavity;

[0030] 20, switching mechanism;

[0031] 21, water inlet cavity seat;

[0032] 211, water inlet hole;212, mounting hole;213, first sealing ring;214, top pressure ring groove;215, convex column;2151, mounting groove;216, second sealing ring;

[0033] 22, switching seat;

[0034] 221, first water passing cavity;222, second water passing cavity;223, third water passing cavity;224, actuating convex strip;225, through hole;

[0035] 23, water outlet panel;

[0036] 231, first water outlet hole; 232, second water outlet hole; 233, third water outlet hole;

[0037] 24, actuating ring; 241, actuating groove; 242, arc segment; 243, operating handle; 244, spring pin;

[0038] 30, cover ring;

[0039] 31, top pressing ring; 311, first positioning groove; 312, second positioning groove; 313, third positioning groove; 32, sliding strip; 310, avoiding space; 33, strip-shaped groove; 34, first limiting segment; 35, second limiting segment;

[0040] 40, connecting bolt;

[0041] 50, filter core; 501, shaft hole. DETAILED DESCRIPTION

[0042] The utility model is further illustrated below in combination with the drawings and examples.

[0043] As Figures 1-9 shown, a pull head, comprising a shell cover 10 and a switching mechanism 20 arranged at the water outlet end of the shell cover 10 for switching the water outlet mode, a containing cavity 101 for installing the filter core 50 is formed between the inside of the shell cover 10 and the switching mechanism 20; the switching mechanism 20 comprises a water inlet cavity seat 21 and a switching seat 22 rotatably installed at the water outlet end of the water inlet cavity seat 21, the water inlet cavity seat 21 has a plurality of water inlet holes 211 communicated with the containing cavity 101, the switching seat 22 is provided with a first water passing cavity 221 and a second water passing cavity 222 for independent water outlet at intervals in the rotation direction, when the switching seat 22 is rotated to the first water passing cavity 221 to communicate with the water inlet hole 211, the pull head is in the first water outlet mode; conversely, when the switching seat 22 is rotated to the second water passing cavity to communicate with the water inlet hole 211, the pull head is in the second water outlet mode.

[0044] The structure of each component of the utility model is described below.

[0045] As Figures 1-3As shown, the housing cover 10 has a threaded column 11 at the water inlet end for screwing with a faucet (not shown in the figure), and a mounting hole 212 at the top surface of the water inlet cavity seat 21 for inserting the tail of the filter element 50, the inside of the filter element 50 inserted into the mounting hole 212 communicates with the water inlet hole 211; a first sealing ring 213 is sleeved at the tail of the filter element 50 and sealingly connected with the mounting hole 212; a second sealing ring 216 is embedded on the side of the water inlet cavity seat 21 and sealingly touches the inner wall surface of the housing cover 10; a cover mounting ring 30 is sleeved on the side of the switching seat 22 for connecting the water inlet cavity seat 21 and the housing cover 10, a top pressing ring groove 214 is formed on the side of the water outlet end of the water inlet cavity seat 21, the cover mounting ring 30 protrudes inwardly towards the water inlet end side to form a top pressing ring 31 matched with the top pressing ring groove 214; a plurality of sliding strips 32 are arranged on the side surface of the cover mounting ring 30 towards the water inlet end, and a plurality of convex strips 12 corresponding to the sliding strips 32 are arranged on the inner wall surface of the water outlet end of the housing cover 10, the convex strips 12 are provided with sliding grooves 121 for the sliding strips 32 to slide into, and the avoidance space 310 is formed between adjacent sliding strips 32 for avoiding the convex strips 12.

[0046] As shown in Figure 2 and Figure 3 , the top pressing ring 31 is positioned and top pressed in the top pressing ring groove 214, and the water inlet cavity seat 21 is inserted into the inside of the top pressing ring 31, in this process, the convex strips 12 in the housing cover 10 slide into the avoidance space 310 along the axial direction, and the housing cover 10 and the water inlet cavity seat 21 form a containing cavity 101, then the housing cover 10 is rotated until the sliding strips 32 slide into the sliding grooves 121 and touch the groove walls of the sliding grooves 121, that is, the quick assembly of the cover mounting ring 30, the water inlet cavity seat 21 and the housing cover 10 is completed; It should be noted that, for the convenience of replacement and maintenance, the housing cover 10 is provided in a split structure in this application, and in other embodiments, the housing cover 10 can also be provided in an integral structure.

[0047] As shown in Figure 5 and Figures 7-9 , a convex column 215 is arranged at the middle position of the water outlet end of the water inlet cavity seat 21, the convex column 215 is provided with a mounting groove 2151, a connecting bolt 40 is inserted into the through hole 225 at the middle position of the switching seat 22, and the connecting bolt 40 is screwed into the mounting groove 2151 of the convex column 215, so that the switching seat 22 is rotatably installed on the water inlet cavity seat 21.

[0048] As shown in Figures 4-9As shown, the switching seat 22 is provided with a third water passing cavity 223 which is spaced apart from the first water passing cavity 221 and the second water passing cavity 222 and independently discharges water; the first water passing cavity 221, the second water passing cavity 222 and the third water passing cavity 223 are located on the same rotation path of the switching seat 22 and are staggered along the same circumferential surface; the switching mechanism 20 further comprises a water discharge panel 23 which is welded and fixed at the water discharge end of the switching seat 22, and the water discharge panel 23 is provided with a first water discharge hole 231 which communicates with the first water passing cavity 221, a second water discharge hole 232 which communicates with the second water passing cavity 222 and a third water discharge hole 233 which communicates with the third water passing cavity 223; it should be noted that the user can select different water discharge shapes corresponding to the three water discharge holes according to actual use, and the first water discharge hole 231 corresponds to the blade water shape, the second water discharge hole 232 corresponds to the shower water shape, and the third water discharge hole 233 corresponds to the bubble water shape.

[0049] As shown in Figure 2 the water inlet hole 211 of the water inlet cavity seat 21 is embedded with a sealing pad 2111 which is in sealing contact with the water inlet end surface of the switching seat 22, so that when the pull head is switched between the first water discharge mode, the second water discharge mode and the third water discharge mode, the water flow can not seep out from the gap between the water inlet cavity seat 21 and the switching seat 22, thereby improving the sealing performance of the overall structure during use of the pull head.

[0050] As shown in Figure 5 a driving ring 24 is sleeved outside the switching seat 22, the circumferential side of the switching seat 22 is provided with a plurality of driving protrusions 224 which extend in the axial direction, the inner side surface of the driving ring 24 is provided with driving grooves 241 which are inserted and matched with the driving protrusions 224, an arc segment 242 is protruded from the circumferential surface of the driving ring 24, and the first limiting segment 34 and the second limiting segment 35 which are located on the rotation path of the arc segment 242 are spaced apart on the inner wall of the cover ring 30; when the driving ring 24 drives the switching seat 22 to rotate to the second water discharge mode, one end of the arc segment 242 is in contact with the first limiting segment 34; when the switching seat 22 rotates to the third water discharge mode, the other end of the arc segment 242 is in contact with the second limiting segment 35.

[0051] As shown in Figure 5 an operation handle 243 is screwed at the middle position of the arc segment 242 for manual holding, and a strip-shaped groove 33 is formed on the cover ring 30 for accommodating the operation handle 243; a spring pin 244 which slides in the axial direction is arranged on the circumferential side of the driving ring 24, and the first positioning groove 311, the second positioning groove 312 and the third positioning groove 313 which are inserted and matched with the spring pin 244 are spaced apart on the top pressing ring 31; when the spring pin 244 is inserted into the first positioning groove 311, the pull head is in the first water discharge mode, when the spring pin 244 is inserted into the second positioning groove 312, the pull head is in the second water discharge mode, and when the spring pin 244 is inserted into the third positioning groove 313, the pull head is in the third water discharge mode.

[0052] The assembly of the utility model is described below. Figures 1-9

[0053] The top pressing ring 31 is pressed into the top pressing ring groove 214, then the actuating ring 24 is slid into the cover cavity, the actuating convex strip 224 on the switching seat 22 is inserted into the actuating groove 241 along the axial direction, the operating handle 243 is screwed on the arc segment 242, the connecting bolt 40 is screwed in the threaded hole of the water inlet cavity seat 21 through the through hole in the middle of the switching seat 22, the water outlet holes on the water outlet panel 23 are aligned with the water passing cavities on the switching seat 22 and are welded and fixed on the water outlet end side of the switching seat 22, finally the filter core 50 is inserted on the connecting column 212 (the filter core 50 can also not be installed), the convex strip 12 in the shell cover 10 is slid into the avoiding space 310 along the axial direction until the shell cover 10 and the water inlet cavity seat 21 form the containing cavity 101, then the shell cover 10 is rotated until the sliding strip 32 is slid into the sliding groove 121 and is in contact pressure with the groove wall of the sliding groove 121, that is, the quick assembly of the puller is completed.

[0054] The above examples are only used for describing the utility model, not limiting the utility model, the ordinary skilled in the art can also make various transformations or changes without departing from the spirit and scope of the utility model, therefore, all equivalent technical solutions should also belong to the scope of the utility model, which is defined by each claim.​

Claims

1. A pull head, comprising an outer shell (10), characterized in that: It also includes a switching mechanism (20) disposed at the water outlet end of the outer shell (10) for switching the water outlet mode, and an accommodating cavity (101) for internal installation of the filter element (50) is formed between the interior of the outer shell (10) and the switching mechanism (20); The switching mechanism (20) comprises a water inlet chamber seat (21) and a switching seat (22) rotatably mounted on the water outlet end of the water inlet chamber seat (21); the water inlet chamber seat (21) has a plurality of water inlet holes (211) communicating with the accommodating chamber (101); the switching seat (22) is rotated upward and is provided with a first water passage chamber (221) and a second water passage chamber (222) for independent water outlets at intervals; when the switching seat (22) is rotated to the point where the first water passage chamber (221) is connected to the water inlet hole (211), the drawer head is in the first water outlet mode; when the switching seat (22) is rotated to the point where the second water outlet chamber is connected to the water inlet hole (211), the drawer head is in the second water outlet mode.

2. A pulling head according to claim 1, characterized in that: A mounting hole (212) is provided on the top surface of the water inlet chamber seat (21) for inserting the tail of the filter element (50); the interior of the filter element (50) inserted into the mounting hole (212) is communicated with the water inlet hole (211); a first sealing ring (213) is sleeved on the tail of the filter element (50) and is sealed with the mounting hole (212); and a second sealing ring (216) is embedded on the circumference of the water inlet chamber seat (21) and is in sealing contact with the inner wall surface of the outer shell cover (10).

3. The pull-out head according to claim 1, wherein: A cover ring (30) for connecting the water inlet chamber seat (21) and the outer shell cover (10) is sleeved on the circumferential side of the switching seat (22); a top pressure ring groove (214) is provided on the water outlet side of the water inlet chamber seat (21); the cover ring (30) protrudes inwardly toward the water inlet side to form a top pressure ring (31) adapted to the top pressure ring groove (214); a plurality of sliding strips (32) are provided on the circumferential surface of the cover ring (30) toward the water inlet side; a plurality of convex strips (12) corresponding to the sliding strips (32) are provided on the inner wall surface of the water outlet side of the outer shell cover (10); a sliding groove (121) for the sliding strip (32) to slide into is provided on the convex strip (12); and an avoidance space (310) for the convex strip (12) to avoid the air and give way to the convex strip (12) is provided between adjacent sliding strips (32).

4. The pulling head according to claim 1, wherein: A convex column (215) is provided at the middle of the water outlet end of the water inlet chamber seat (21), and a mounting groove (2151) is provided in the convex column (215). A connecting bolt (40) that is screwed into the mounting groove (2151) is inserted into the through hole (225) in the middle of the switching seat (22).

5. The pulling head according to claim 1, characterized in that: A third water passage chamber (223) is provided on the switching seat (22), which is separated from the first water passage chamber (221) and the second water passage chamber (222) and has independent water discharge; the first water passage chamber (221), the second water passage chamber (222) and the third water passage chamber (223) are located on the same rotation path of the switching seat (22).

6. A pulling head according to claim 5, characterized in that: The switching mechanism (20) further comprises a water outlet panel (23) fixed to the water outlet end of the switching seat (22), wherein the water outlet panel (23) is provided with a first water outlet hole (231) communicating with the first water passage cavity (221), a second water outlet hole (232) communicating with the second water passage cavity (222), and a third water outlet hole (233) communicating with the third water passage cavity (223).

7. The pulling head according to claim 1, characterized in that: A sealing gasket (2111) is embedded at the water outlet end of the water inlet hole (211) of the water inlet cavity seat (21) and is in sealing contact with the water inlet end surface of the switching seat (22).

8. The pulling head according to claim 1, characterized in that: An actuating ring (24) is sleeved on the outer side of the switching seat (22); a plurality of actuating ridges (224) extending in the axial direction are formed on the circumferential side of the switching seat (22); an actuating groove (241) for the actuating ridges (224) to be plugged and matched is provided on the inner side of the actuating ring (24); a rotating arc section (242) is formed on the circumferential surface of the actuating ring (24); a first limiting section (34) and a second limiting section (35) located on the rotating path of the rotating arc section (242) are arranged on the inner wall of the cover ring (30); when the actuating ring (24) drives the switching seat (22) to rotate to the second water outlet mode, one end of the rotating arc section (242) contacts and presses the first limiting section (34); when the switching seat (22) rotates to the third water outlet mode, the other end of the rotating arc section (242) contacts and presses the second limiting section (35).

9. A pulling head according to claim 8, characterized in that: An operating handle (243) for hand-holding is screwed to the middle of the arc section (242), and a strip groove (33) for making way for the operating handle (243) is provided on the cover ring (30).

10. The pulling head according to claim 8, characterized in that: An elastic pin (244) that slides in the axial direction is provided on the circumferential side of the actuating ring (24), and a first positioning groove (311), a second positioning groove (312), and a third positioning groove (313) for the elastic pin (244) to be plugged in are provided on the top pressure ring (31) at intervals; when the elastic pin (244) is plugged in the first positioning groove (311), the pulling head is in the first water outlet mode; when it is plugged in the second positioning groove (312), the pulling head is in the second water outlet mode; and when it is plugged in the third positioning groove (313), the pulling head is in the third water outlet mode.

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