TWM466995U - Sink installation structure - Google Patents

Description

Wash basin installation structure

The invention relates to the technical field of a sink and a basin, and in particular to a mounting structure for installing a faucet on a basin.

It is well known that it is inconvenient to install or remove a faucet on an existing basin, and it is necessary to operate in a narrow space below the basin, which is time consuming and laborious. In order to solve the above problems, a faucet outlet pipe member which is easy to install and remove is described in the Chinese Patent Application Specification No. 00103736.6. However, it can be known from the description of the specification and the drawings of the specification that the installation process of the faucet outlet pipe member which is easy to install and remove is very cumbersome and usually requires the operation of a technician; therefore, the basin is not solved. The problem of inconvenient installation or removal of the faucet.

The purpose of the present invention is to provide a mounting structure for the basin in response to the above problems, which makes the installation or disassembly of the faucet extremely simple.

The technical solution adopted by the present invention to solve the above technical problems is: a mounting structure of a washbasin, comprising a basin body, wherein: the basin body is provided with a placement tube, and the upper or lower end of the installation tube and the platform The upper platform of the basin body is integrally connected, and the installation pipe is vertically permeable; the inner hole of the installation pipe of the basin body is provided with a connector detachably connected thereto; the basin body Positioning means for constraining the vertical and/or circumferential rotation of the coupler are provided thereon.

According to an aspect of the present invention, the coupling is connected as a water passage to the faucet and the hose, and the upper end of the placement pipe having a polygonal cross section is integrally connected with the upper platform (11) of the basin body, and the installation pipe is integrally formed. (2) The upper opening penetrates the upper platform of the basin (11), the lower end of the positioning pipe (2) extends downward to the bottom of the basin body, the coupling is a connecting pipe adapted to the mounting pipe, and the upper end of the connecting pipe is connected with the faucet The lower end of the connecting pipe protrudes from the outside of the mounting pipe and is connected to the hose.

In one embodiment, the positioning device includes an annular portion made of a magnetic material disposed at an outer periphery of the upper end opening of the placement tube, and an edge portion made of a magnetic material extending radially outward at an upper end of the connecting tube. .

In another embodiment, the positioning device includes a fastening ring I that engages with an upper end of the connecting tube, and a fastening ring II that extends upward from an upper end opening of the mounting tube, the fastening ring The projected area of II is larger than the projected area of the placement tube, and the fastening ring I and the fastening ring II are screwed.

The fastening ring I and the connecting tube are engaged in such a manner that the upper end of the connecting tube has a radially outwardly extending flange, and the upper end of the fastening ring I has a radially inwardly extending protrusion, the protrusion The diameter of the rim is smaller than the outer diameter of the fastening ring II and larger than the inner diameter of the projection.

According to another aspect of the present invention, the coupler does not participate in the waterway, the hose is directly connected to the faucet, and the placement pipe extends downward from the upper platform of the basin body to the bottom of the basin body, the coupler being The connecting tube is adapted to the connecting sleeve, the upper end of the connecting sleeve is connected to the faucet, and the hose is connected to the faucet through the connecting sleeve.

In one embodiment, the positioning device includes a circular recess provided in the upper end opening of the mounting tube of the upper platform, a radially outwardly extending flange of the upper end of the connecting sleeve, and a threaded connection a nut of the lower end of the connecting sleeve, the connecting tube has a polygonal cross section, the flange is inserted into the recessed hole, and the upper end surface of the nut abuts the lower end surface of the connecting sleeve .

In another embodiment, the positioning device includes a screw hole formed in a sidewall of the mounting tube, and a screw that is screwed into the screw hole so that the end abuts against an outer sidewall of the connecting sleeve, and A lip extending radially outwardly at an upper end of the connecting sleeve, the mounting tube having a circular cross section.

According to another aspect of the present invention, the coupling is integrally formed with a faucet that extends downward from the upper platform of the basin body to the bottom of the basin body, the mounting tube having a circular cross section. The coupling is an extension tube adapted to the placement tube, the extension tube being formed extending downward from a faucet body at a lower portion of the faucet, the lower end of the extension tube being connected to the hose.

The positioning device includes a screw hole opened in a sidewall of the mounting tube, and a tightening screw screwed into the screw hole so that an end abuts an outer sidewall of the extension tube.

According to another aspect of the present invention, the connector is integrally formed with the faucet, the mounting tube projects upward from the upper platform of the basin body, the mounting tube has a circular cross section, and the connector is disposed with the faucet An inner tube of the tube is fitted with an extension tube formed from a faucet tube body at a lower portion of the faucet, the lower end of which is connected to the hose.

The positioning device includes a screw hole opened in a sidewall of the mounting tube, and a tightening screw screwed into the screw hole so that the end abuts against an outer sidewall of the connecting sleeve.

With the above-mentioned structure, when the faucet is installed thereon, it is not necessary to use any tools, and the extension pipe of the lower part of the faucet is extended from the top to the bottom into the inner hole of the installation pipe of the basin, and the pipe is placed by hand. The top screws on the side walls can be tightened; this installation takes only a few seconds. When disassembling, it is also not necessary to use any tools. Simply loosen the top screw by hand to remove the faucet from the mounting tube of the basin; this disassembly process takes only a few seconds. The faucet can be stably mounted to the basin in a few seconds without any tools, and can be done by ordinary users; thus, it can be seen that the present invention does not install the faucet on the basin. Convenient problems have undergone subversive and revolutionary changes, which solves the problem of inconvenient installation of faucets on the basin. New type

1‧‧‧ basin body

2‧‧‧Placement tube

3‧‧‧Connecting tube

3'‧‧‧Connecting sleeve

3"‧‧‧ Extension tube

4‧‧‧Water tap

5‧‧‧Hose

6‧‧‧Squeeze nuts

7‧‧‧ fastening ring

11‧‧‧Upper platform

12‧‧‧ ring section

21‧‧‧ Strengthening the wall

23‧‧‧ recessed hole

24‧‧‧ screw holes

25‧‧‧Top tightening screws

31‧‧‧Edge section

32‧‧‧ pipe joints

33‧‧‧Front

34‧‧‧Flange

35‧‧‧ lip

36‧‧‧Extended pipe joints

41‧‧‧ Faucet body

51‧‧‧ nuts

52‧‧‧ nuts

71‧‧‧Protruding

1 is an exploded perspective view of a first embodiment of the present invention; FIG. 2 is a partial assembled view of FIG. 3 is a schematic exploded view of FIG. 1; FIG. 4 is an exploded perspective view of the second embodiment; FIG. 5 is a partial assembly view of FIG. 4; FIG. Figure 8 is an exploded perspective view of the third embodiment of the present invention; Figure 9 is a partial assembly view of Figure 8; Figure 10 is an assembled view of Figure 8; Figure 11 is an exploded perspective view of the fourth embodiment of the present invention; FIG. 13 is an exploded perspective view of FIG. 11; FIG. 14 is a partial exploded view of FIG. 14; FIG. 16 is a partial assembly view of FIG. 14; FIG. FIG. 18 is a partial assembly diagram of FIG. 17; FIG. 19 is an assembly diagram of FIG. 17; FIG. 20 is an exploded perspective view of the seventh embodiment of the present invention; FIG. It is an assembly diagram of FIG.

The present invention will be further described in detail below with reference to the embodiments of the drawings.

Embodiment 1

Referring to Fig. 1, a mounting structure of a washbasin includes a basin body 1, a hollow mounting pipe 2 extending downward from the upper platform 11 of the basin body 1 to the bottom of the basin body 1, and a detachable pipe 2 Connected connecting pipe 3. The cross section of the installation pipe 2 is polygonal, the upper end of the installation pipe 2 is integrally connected with the upper platform 11 of the basin body, the upper opening of the installation pipe 2 penetrates the upper platform 11; the outer side wall of the installation pipe 2 is provided with an upper ring plus The strong wall 21 is connected to the basin body 1 such that the position of the placement pipe 2 is relatively stable. The connecting tube 3 is shaped to match the inner bore of the mounting tube 2, the upper end of which has a radially outwardly extending edge portion 31 of magnetic material, the upper end of which has an internal thread for connection to the faucet 4, the lower end The pipe joint 32 has a vertically downwardly extending diameter, and the pipe joint 32 is provided with an external thread for connection with the hose 5, and the hose 5 is connected to the water outlet pipe.

The upper platform 11 of the basin body 1 is provided with a placement pipe 2, and an annular portion 12 made of a magnetic material is disposed on the outer periphery of the upper end opening of the installation pipe 2, and cooperates with the edge portion 31 of the connection pipe 3, and the two can be attracted to each other. .

When installing, referring to Fig. 2, firstly, the upper end of the connecting pipe 3 is screwed with the faucet 4, and the lower end pipe joint 32 is connected with the hose 5 and locked with a nut 51; see Fig. 3, and then the connected connection The tube 3 is inserted into the placement tube 2 from top to bottom such that the edge portion 31 is caught at the annular portion 12 and the tube joint 32 extends beyond the placement tube 2. Since the edge portion 31 and the annular portion 12 are both made of a magnetic material, under the action of the magnetic force, the two are attracted, so that the connecting pipe 3 cannot move relative to the positioning pipe 2 in the vertical direction, and the mounting pipe 2 and the connecting pipe 3 are both The polygon restricts the rotation of the connecting pipe 3, completes the positioning of the connecting pipe 3, so that the faucet 4 is fixed to the basin body 1, and the water flows through the hose 5 and the connecting pipe 3 to the faucet 4. Also, since the placement pipe 2 has a certain depth, the faucet 4 connected thereto has a certain stability.

When it is necessary to disassemble, the faucet 4, the connecting pipe 3 and the hose 5 which are connected together can be taken out from the setting pipe 2 by only a little force by hand (greater than the strength of the magnetic force).

Embodiment 2

Referring to FIG. 4, the difference between this embodiment and the first embodiment described above is that the connecting pipe 3 is vertically restrained by the pressing nut 6 instead of the edge portion 31 and the annular portion 12. The outer diameter of the tightening nut 6 is larger than the setting pipe. The inner diameter of 2 is connected to the upper portion of the pipe joint 32.

When installing, referring to Fig. 5, the upper end of the connecting pipe 3 is first screwed to the faucet 4; then, referring to Fig. 6, the connected connecting pipe 3 is inserted into the placing pipe 2 from top to bottom. Thereafter, the pipe joint 32 extends out of the pipe 2; then, referring to Fig. 7, the pinch nut 6 is screwed to the upper portion of the pipe joint 32, and the hose 5 is screwed to the lower portion of the pipe joint 32 by the nut 51; The upper end surface of the squeezing nut 6 abuts against the lower end surface of the arranging pipe 2, and the lower end surface of the faucet pipe body 41 at the lower portion of the faucet 4 abuts against the upper platform 11 (the diameter of the faucet pipe body 41 is larger than the diameter of the arranging pipe 2) ), thereby defining the vertical position of the connecting pipe 3 so that it cannot move vertically relative to the mounting pipe 2, and the mounting pipe 2 and the connecting pipe 3 are both polygonal, which restricts the connecting pipe 3 from rotating and completes the connection. The tube 3 is positioned such that the faucet 4 is fixed to the basin body 1 and the water flows through the hose 5 and the connecting tube 3 to the faucet 4.

When disassembly is required, the hose 5 and the tightening nut 6 on the pipe joint 32 are simply unscrewed by hand, and then the faucet 4 and the connecting pipe 3 are taken out from the setting pipe 2.

Embodiment 3

Referring to Fig. 8, the present embodiment is different from the above-described first embodiment in that the connecting portion 3 is vertically restrained by the fastening ring I7 and the fastening ring II22 instead of the edge portion 31 and the annular portion 12. a fastening ring II22 having a projection area larger than a projected area of the placement tube 2 is formed upwardly on the upper platform 11 and the fastening ring II22 has an external thread; the fastening ring I7 is used for cooperating with the fastening ring II22, which has Internal thread, and the upper end has a radially inwardly extending projection 71, the upper end of the connecting tube 3 has a radially outwardly extending flange 33, the outer diameter of the flange 33 is smaller than the diameter of the fastening ring II22, and larger than the protrusion The inner diameter of 71.

When installing, referring to Fig. 9, first, the fastening ring I7 is sleeved on the lower part of the faucet 4, and the upper end of the connecting pipe 3 is screwed with the faucet 4, the lower end pipe joint 32 is connected with the hose 5, and locked with the nut 51. Then, referring to Fig. 10, the connected connecting pipe 3 is inserted into the placing pipe 2 from top to bottom, so that the flange 33 is caught in the upper platform 11 portion in the fastening ring II22, and the pipe joint 32 is extended to the mounting pipe 2. The tightening ring I7 and the fastening ring II22 are tightened such that the upper end portion of the flange 33 abuts against the protruding portion 71 of the fastening ring I7, thereby defining the vertical position of the connecting tube 3 so that it cannot be placed oppositely The tube 2 is vertically moved, and the placement tube 2 and the connecting tube 3 are both polygonal, which limits the connection tube 3 The rotation can be completed, and the positioning of the connecting pipe 3 is completed, so that the faucet 4 is fixed to the basin body 1, and the water flows through the hose 5 and the connecting pipe 3 to the faucet 4.

When disassembly is required, the fastening ring I7 is simply unscrewed by hand, and then the faucet 4, the connecting pipe 3 and the hose 5 are taken out from the setting pipe 2.

Embodiment 4

Referring to Fig. 11, a mounting structure of a washbasin includes a basin body 1, a hollow mounting pipe 2 extending downward from the upper platform 11 of the basin body 1 to the bottom of the basin body 1, and detachably connected to the mounting pipe 2. Connection sleeve 3'. The cross section of the installation pipe 2 is polygonal, the upper end of the installation pipe 2 is integrally connected with the upper platform 11 of the basin body, the upper opening of the installation pipe 2 penetrates the upper platform 11; the outer side wall of the installation pipe 2 is provided with an upper ring The wall 21 is reinforced and connected to the basin body 1 such that the position of the placement pipe 2 is relatively stable; the upper platform 11 of the basin body 1 is provided with a circular recess 23 at the upper end opening of the installation pipe 2. The connecting sleeve 3' is shaped to match the inner bore of the mounting tube 2, the upper end of which has a radially outwardly extending flange 34, the upper end of which has an internal thread for connection to the faucet 4; the size of the flange 34 The concave hole 23 is adapted to be caught in the concave hole 23, and the lower end is provided with an external thread for connecting with the nut 52. In the present embodiment, the two hoses 5 are directly connected to the double-hole faucet 4 and are respectively connected to different outlet pipes.

When installing, referring to Fig. 12, firstly, the upper end of the connecting pipe 3 is screwed with the faucet 4, see Fig. 13, and then the hose 5 and the connecting sleeve 3' are sequentially inserted into the placing pipe 2 from top to bottom; The rim 34 is caught in the recessed hole 23, and the external thread of the lower end of the connecting sleeve 3' protrudes out of the mounting tube 2; the nut 52 is screwed onto the external thread of the lower end of the connecting sleeve 3', and the upper end surface of the nut 52 is The lower end surface of the connecting sleeve 3' abuts, so that the connecting sleeve 3' cannot move vertically relative to the mounting tube 2, and the mounting tube 2 and the connecting sleeve 3' are both polygonal, limiting the connecting sleeve 3' Without being rotated, the positioning of the connecting sleeve 3' is completed, so that the faucet 4 is fixed to the basin body 1, and the water flows through the hose 5 to the faucet 4. Also, since the placement pipe 2 has a certain depth, the faucet 4 connected thereto has a certain stability.

When the disassembly is required, the faucet 4, the connecting sleeve 3' and the hose 5 which are connected together can be taken out from the setting pipe 2 by simply unscrewing the nut 52 by hand.

Embodiment 5

Referring to Fig. 14, a mounting structure of a washbasin includes a basin body 1, a hollow mounting pipe 2 extending downward from the upper platform 11 of the basin body 1 to the bottom of the basin body 1, and detachably connected to the mounting pipe 2. Connection sleeve 3'. The installation pipe 2 has a circular cross section, and the side wall is provided with a screw hole 24 and a top screw 25 matched with the screw hole 24. The upper end of the installation pipe 2 is integrated with the upper platform 11 of the basin body. The upper opening of the placement pipe 2 penetrates the upper platform 11. The connecting sleeve 3' is shaped to match the inner bore of the mounting tube 2, the upper end of which has a radially outwardly extending lip 35, the upper end of which has an internal thread for connection to the faucet 4. In the present embodiment, the two hoses 5 are directly connected to the double-hole faucet 4 and are respectively connected to different outlet pipes.

When installing, referring to Figure 15, firstly, the upper end of the connecting sleeve 3' is screwed to the faucet 4, and then, referring to Figure 16, the hose 5 and the connecting sleeve 3' are sequentially inserted into the mounting tube 2 from top to bottom; The lip 35 is caused to be caught on the upper platform 11 portion around the upper end opening of the installation pipe 2, and the lower end of the connection sleeve 3' is flush with the lower end of the installation pipe 2; then the top screw 25 is screwed into the screw hole 24, The end is abutted against the outer side wall of the connecting sleeve 3', whereby the connecting sleeve 3' can neither move vertically relative to the mounting tube 2 nor rotate relative to the mounting tube 2 to complete the positioning of the connecting sleeve 3'. Thereby, the faucet 4 is fixed to the basin body 1, and the water flows through the hose 5 to the faucet 4. Also, since the placement pipe 2 has a certain depth, the faucet 4 connected thereto has a certain stability.

When the disassembly is required, the faucet 4, the connecting sleeve 3' and the hose 5 which are connected together can be taken out from the setting pipe 2 by simply loosening the jacking screw 25 by hand.

Embodiment 6

Referring to Fig. 17, the difference between the embodiment and the fifth embodiment described above is that the extension tube 3'' integrally formed with the faucet 4 is used to replace the connection sleeve 3', and is formed by extending downward from the faucet body 41 at the lower portion of the faucet 4. , the diameter of the extension tube 3'' is smaller than water The diameter of the faucet body 41, the lower end of the extension tube 3'' is provided with an extension pipe joint 36 having an external thread for connection with the hose 5. The hose 5 shown in Figure 17 is a single strip. Alternatively, the hose 5 can be two, in which case the faucet 4 is a corresponding two-hole.

When installing, referring to Fig. 18, the lower end of the extension tube 3'' is first screwed to the hose 5, and then, referring to Fig. 19, the hose 5 and the extension tube 3'' are sequentially inserted into the placement tube 2 from top to bottom. , the faucet pipe body 41 is stuck on the upper platform 11 portion around the upper end opening of the installation pipe 2, and the extension pipe joint 36 at the lower end of the extension pipe 3'' extends out of the installation pipe 2; then the top screw 25 is screwed into the screw hole 24 is tightened so that its end abuts against the outer side wall of the extension tube 3'', so that the extension tube 3" can neither move vertically relative to the placement tube 2 nor rotate relative to the placement tube 2, completing the extension tube The positioning of 3'' is such that the faucet 4 is fixed to the basin body 1 and the water flows through the hose 5 to the faucet 4. Also, since the placement pipe 2 has a certain depth, the faucet 4 connected thereto has a certain stability. When the disassembly is required, the faucet 4 and the hose 5 connected together can be taken out from the placement pipe 2 by simply loosening the top screw 25 by hand.

The advantage of this embodiment is that the installation or removal of the faucet can be completed in a few seconds, which is extremely simple.

Example 7

Referring to Figures 20 to 22, a mounting structure of a washbasin includes a basin body 1 from which an upwardly projecting hollow mounting tube 2 is provided from the upper platform 11 of the basin body 1, and the connection to the mounting tube 2 is detachably connected. Sleeve 3. The lower opening of the installation pipe 2 penetrates the upper platform 11 of the basin body. The inner hole of the installation pipe 2 has a polygonal cross section, and the side wall is provided with a screw hole 24 and a tightening screw 25 matched with the screw hole 24. The connecting sleeve 3 is shaped to match the inner bore of the mounting tube 2, the upper end of which has a radially outwardly extending flange 34, the upper end of which has an internal thread for connection to the faucet 4. In the present embodiment, the two hoses 5 are directly connected to the double-hole faucet 4 and are respectively connected to different outlet pipes.

The above description is only a preferred embodiment of the present invention, and it should be noted that various modifications and improvements can be made by those skilled in the art without departing from the principles of the present invention. New range of protection.

1‧‧‧ basin body

2‧‧‧Placement tube

3'‧‧‧Connecting sleeve

4‧‧‧Water tap

5‧‧‧Hose

11‧‧‧Upper platform

24‧‧‧ screw holes

25‧‧‧Top tightening screws

35‧‧‧ lip

Claims (12)

A mounting structure of a basin, comprising a basin body (1), characterized in that: the upper platform (11) of the basin body (1) is provided with a top and bottom transparent placement tube (2), the placement tube (2) The upper end or the lower end is integrally connected with the upper platform (11), the inner hole of the installation pipe (2) penetrates the upper platform (11); the installation pipe (2) of the basin body (1) a coupling is provided on the inner hole, the coupling is detachably connected with the inner hole of the mounting pipe (2), and the basin body (1) is provided with the coupling Positioning means for vertical movement and/or circumferential rotation for restraint. The installation structure of the washbasin according to the first aspect of the invention, wherein the installation pipe (2) has a polygonal cross section, and the upper end of the installation pipe (2) and the upper platform of the basin body (11) Between the two, the upper opening of the placement pipe (2) penetrates the upper platform (11) of the basin, and the lower end of the installation pipe (2) extends to the lower portion of the basin body (1); The connector is a connecting pipe (3) adapted to the inner hole of the mounting pipe (2), the upper end of the connecting pipe (3) is connected to the faucet (4), and the lower end of the connecting pipe (3) is extended The installation pipe (2) is connected to the hose (5). The mounting structure of the washbasin according to the second aspect of the invention, wherein the positioning device comprises an annular portion (12) made of a magnetic material disposed on an outer periphery of an upper end opening of the mounting pipe (2), and An edge portion (31) of a magnetic material extending radially outward from the upper end of the connecting tube (3). The mounting structure of the washbasin according to the second aspect of the invention, wherein the positioning device comprises a fastening ring II (7) that engages with an upper end of the connecting pipe (3), and from the mounting pipe (2) a fastening ring II (22) extending upward at an upper end opening, a projected area of the fastening ring II (22) being larger than a projected area of the placement tube (2), and the fastening ring II ( 7) Threaded with the fastening ring II (22). The mounting structure of the washbasin according to the fourth aspect of the invention, wherein the upper end of the connecting pipe (3) has a radially outwardly extending flange (33), the fastening ring I (7) The upper end has a radially inwardly extending projection (71), the flange (33) having a smaller diameter The outer diameter of the fastening ring II (22) is larger than the inner diameter of the protrusion (71). The installation structure of the washbasin according to the first aspect of the invention, wherein the upper end of the installation pipe (2) and the upper platform (11) of the basin body are integrally connected, and the installation pipe (2) The upper opening penetrates the upper platform (11) of the basin, the lower end of the placement tube (2) extends to the lower portion of the basin body (1); the coupling is the inner hole with the placement tube (2) An adapter sleeve (3'), the upper end of which is connected to a faucet (4) through which the hose (5) passes and the faucet (3) 4) Connect. The mounting structure of the washbasin according to claim 6, wherein the positioning device comprises a circular recessed hole (23) provided at an upper end opening of the mounting pipe (2) of the upper platform (11). a radially outwardly extending flange (34) at an upper end of the connecting sleeve (3'), and a nut (52) threadedly coupled to a lower end of the connecting sleeve (3'), the mounting tube ( 2) The cross section is polygonal, the flange (34) is caught in the recessed hole (23), and the upper end surface of the nut (52) is abutted against the lower end surface of the connecting sleeve (3') Pick up. The mounting structure of the washbasin according to the sixth aspect of the invention, wherein the positioning device comprises a screw hole (24) formed in a side wall of the mounting pipe (2), and screwed into the screw hole (24) a tightening screw (25) having an inner end and abutting an outer side wall of the connecting sleeve (3'), and a lip (35) extending radially outward at an upper end of the connecting sleeve (3') The placement tube (2) has a circular cross section. The installation structure of the washbasin according to the first aspect of the invention, wherein the upper end of the installation pipe (2) and the upper platform (11) of the basin body are integrally connected, and the installation pipe (2) The upper opening penetrates the upper platform (11) of the basin, the lower end of the placement tube (2) extends to the lower portion of the basin body (1), and the cross section of the placement tube (2) is circular; The coupling is an extension tube (3'') adapted to the inner bore of the placement tube (2), the extension tube (3'') being downward from the faucet body (41) at the lower portion of the faucet (4) Extendingly formed, the lower end of the extension tube (3'') is provided with an extension pipe joint (36) having an external thread for connection with the hose (5). The mounting structure of the washbasin according to the ninth aspect of the invention, wherein the positioning device comprises a screw hole (24) provided on a side wall of the mounting pipe (2), and A tightening screw (25) screwed into the screw hole (24) so that the end abuts against the outer side wall of the extension tube (3''). The installation structure of the washbasin according to claim 1, wherein the installation pipe (2) projects upward from the upper platform (11) of the basin body (1), and the placement pipe (2) The lower opening penetrates the upper platform (11) of the basin body, the inner hole of the mounting tube (2) has a polygonal cross section; the coupling is a connecting sleeve adapted to the mounting tube (2) 3) The connecting sleeve (3) has a shape matching the inner hole of the mounting tube (2), the upper end of which has a radially outwardly extending flange (34), and the upper end of the hole wall has an internal thread for use with the faucet (4) Connection. The mounting structure of the washbasin according to claim 11, wherein the positioning device comprises a screw hole (24) opened on a side wall of the mounting pipe (2), and screwed into the screw hole ( 24) A tightening screw (25) that terminates in contact with the outer side wall of the connecting sleeve (3).