CN210947023U

CN210947023U - Environment-friendly wash stand applied to assembly type public toilet

Info

Publication number: CN210947023U
Application number: CN201921569254.XU
Authority: CN
Inventors: 郝东来; 李淮安; 郝兆武; 李莉
Original assignee: Changzhou Runxiang Environmental Protection Technology Co ltd
Current assignee: Changzhou Runxiang Environmental Protection Technology Co ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-07-07
Anticipated expiration: 2029-09-19

Abstract

The utility model discloses an environment-friendly wash stand applied to an assembled public toilet, which relates to the technical field of wash stands, and the key point of the technical proposal is that the environment-friendly wash stand comprises an installation box and a first water outlet pipe fixedly connected with a toilet water tank; a water pump is fixed at one end of the first water outlet pipe, which is far away from the toilet water tank, a second water outlet pipe is fixed at one side of the water pump, which is far away from the first water outlet pipe, a water stop valve is fixed at one end of the second water outlet pipe, which is far away from the water pump, a third water outlet pipe is fixed at one side of the water stop valve, a recovery water tank is fixed at one end of the third water outlet pipe, which is far away from the water stop valve, guide rails are respectively fixed on the opposite inner side walls of the installation box; a washing tank is fixed on the top of the mounting plate; the washing basin bottom is fixed with the hose, and washing basin one end and recovery water tank top fixed connection are kept away from to the hose. The utility model provides a problem of the easy wearing and tearing of outlet pipe of wash basin, reduced the possibility of outlet pipe wearing and tearing.

Description

Environment-friendly wash stand applied to assembly type public toilet

Technical Field

The utility model relates to a wash stand technical field, more specifically the saying so, it relates to an environmental protection wash stand who is applied to assembled public latrine.

Background

At present, a frame structure is formed by welding steel materials in a mobile public toilet, a base frame of the common mobile public toilet adopts channel steel or I-steel, and an upright post adopts square steel; and installing the wall material on the basis of the frame type structure.

In the prior art, reference is made to the patent of the invention of china with publication number CN108252369A, which discloses an integrated water-saving washstand, comprising a washstand, a wash basin and a tap arranged on the washstand, and a waterway pipeline arranged in the washstand and connected with the tap, wherein a toilet is arranged at one side of the washstand, a toilet water tank is hidden in the washstand, the wash basin is rotatably mounted at the top of the toilet through a rotating shaft arranged at one side of the washstand, and the relative position of the wash basin and the toilet can be adjusted by rotating the wash basin.

However, the above-mentioned wash basin is at the rotation in-process, and the outlet pipe of wash basin can rub with the wash platform lateral wall, and long-term use can cause the outlet pipe wearing and tearing, and then influences the tube coupling between wash basin and the closestool water tank.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a be applied to environmental protection washstand in assembled public latrine, it is inboard through setting up the outlet pipe in the install bin, has reduced the possibility of outlet pipe wearing and tearing.

In order to achieve the above purpose, the utility model provides a following technical scheme:

an environment-friendly washstand applied to an assembled public toilet comprises an installation box and a first water outlet pipe fixedly connected with a toilet water tank; a water pump is fixed at one end, away from the toilet water tank, of the first water outlet pipe, a second water outlet pipe is fixed at one side, away from the first water outlet pipe, of the water pump, a water stop valve is fixed at one end, away from the water pump, of the second water outlet pipe, a third water outlet pipe is fixed at one side, away from the second water outlet pipe, of the water stop valve, a recovery water tank is fixed at one end, away from the water stop valve, of the third water outlet pipe, guide rails are respectively fixed on the opposite inner side walls of the installation box, and the two guide rails; a washing tank is fixed at the top of the mounting plate; the bottom of the washing tank is fixed with a hose, and one end of the washing tank and the top of the recovery water tank are far away from the hose.

By adopting the technical scheme, after the washing tank is pulled outwards, the water tap is positioned above the washing tank, water flow in the washing tank flows downwards into the recovery water tank through the hose and flows into the second water outlet pipe through the water stop valve by the third water outlet pipe, after the water pump is opened, the water flow flows into the first water outlet pipe through the second water outlet pipe and flows into the toilet water tank through the first water outlet pipe, and the washing tank is arranged in the installation box in a sliding manner, so that the space is saved; simultaneously, the hose of being connected with the washing groove sets up in the install bin equally, and the washing groove removes in-process hose and can not take place the friction with the installation tank wall, reduces the possibility of third outlet pipe wearing and tearing.

The utility model discloses further set up to: two dovetail blocks are fixed at two ends of the mounting plate respectively, two dovetail grooves are formed in the inner sides of the guide rails respectively, and the dovetail blocks correspond to the dovetail blocks one to one and are connected with the dovetail grooves in a sliding mode along the length direction of the mounting box.

Through adopting above-mentioned technical scheme, the dovetail provides the guide effect for the forked tail piece, reduces the mounting panel and deviates from orbital possibility when moving along install bin length direction.

The utility model discloses further set up to: the water stop valve comprises a circular valve seat fixedly connected with a third water outlet pipe, an arc-shaped through hole formed in the outer peripheral surface of the circular valve seat, a valve plate arranged in the arc-shaped through hole in a vertically sliding mode, a valve rod fixed to the top of the valve plate and a valve body fixed to the inner bottom surface of the mounting box; one side of the circular valve seat, which is close to the water pump, is fixedly connected with the second water outlet pipe; a connecting rod mechanism for driving the valve rod to move upwards is arranged between the valve rod and the mounting plate; an elastic piece for driving the valve rod to reset is arranged between the valve rod and the valve body; and a guide assembly used for driving the valve rod to move vertically is arranged between the valve rod and the valve body.

By adopting the technical scheme, after the valve rod moves downwards along the vertical direction, the valve plate stops the water flow between the second water outlet pipe and the third water outlet pipe, and the water stop valve is in a closed state at the moment. The valve rod is driven by the connecting rod mechanism to ascend, the valve plate moves upwards along with the valve rod, a gap is formed between the valve plate and the inner peripheral surface of the valve seat, water flows into or out of the gap, and the possibility that the water flow of the second water outlet pipe flows back to enter the third water outlet pipe is reduced by arranging the water stop valve.

The utility model discloses further set up to: the connecting rod mechanism comprises a first connecting rod hinged with the bottom of the mounting plate, a second connecting rod hinged with one end, far away from the mounting plate, of the first connecting rod, a supporting piece vertically fixed at one end, far away from the first connecting rod, of the second connecting rod, a pressing piece fixed on the outer peripheral surface of the valve rod and a matching assembly arranged between the supporting piece and the pressing piece; and a limiting component for driving the second connecting rod to rotate is arranged between the second vertical rod and the valve body.

Through adopting above-mentioned technical scheme, when the washing basin was removed to being close to tap one side, first connecting rod was close to washing basin one end and was removed along with the washing basin, and first connecting rod was kept away from washing basin one end and is dragged the second connecting rod to being close to tap one side, and the second connecting rod rotates under spacing subassembly effect to drive support piece is close to the press piece, is convenient for pull the press piece through support piece upwards lifting, thereby drives the valve rod and rises, removes opening that realizes the stagnant water valve through the washing basin.

The utility model discloses further set up to: the matching component comprises two inclined planes which are respectively arranged on the opposite inner sides of the supporting piece and the pressing piece.

By adopting the technical scheme, the supporting piece upwards presses the pressing piece through the inclined plane and drives the pressing piece to upwards move; after the second connecting rod continues to rotate, the supporting piece is located below the pressing piece and drives the pressing piece to move upwards, the valve rod is driven to move upwards through the pressing piece conveniently, the valve plate is further driven to move upwards through the valve rod, and therefore the water stop valve is driven to be opened.

The utility model discloses further set up to: spacing subassembly including be fixed in the extension rod at valve body top, be fixed in the gag lever post of extension rod bottom and with second connecting rod articulated connecting rod, the connecting rod keep away from second montant one end with the extension rod is connected along vertical sliding.

Through adopting above-mentioned technical scheme, when first connecting rod was removed to being close to tap one side along with the washing groove, the connecting rod was along vertical rebound under the limiting displacement of gag lever post, and the second connecting rod uses the connecting rod to keep away from valve rod one end and rotates as the axle center, carries out lever motion through making the second connecting rod as the fulcrum with the connecting rod, is convenient for drive the valve rod through the rotation of second connecting rod and rises to make the stagnant water valve open.

The utility model discloses further set up to: the elastic piece is a spring fixed at the top of the valve rod, and one end of the spring, far away from the valve rod, is fixedly connected with the inner top surface of the valve body.

By adopting the technical scheme, after the valve rod moves upwards, the spring is in a compression state, the spring applies upward elastic force to the valve rod, the valve rod can be driven by the spring to reset downwards after the supporting piece is separated from the pressing piece, and therefore the water stop valve is closed.

The utility model discloses further set up to: the guide assembly comprises a guide shaft fixed to the top of the valve rod and a circular through hole formed in the top of the valve body, and the valve rod is arranged on the outer peripheral surface of the guide shaft in a sliding mode through the circular through hole.

Through adopting above-mentioned technical scheme, the guiding axle provides the guide effect for circular through-hole, is convenient for reduce the valve rod along the orbital possibility of deviating of vertical removal in-process.

To sum up, the utility model discloses compare and have following beneficial effect in prior art:

1. the washing tank is arranged in the installation box in a sliding manner, and the washing tank is moved in a push-pull manner, so that the space is saved;

2. the hose connected with the washing tank is arranged in the mounting box, so that the hose cannot rub against the wall of the mounting box in the moving process of the washing tank, and the possibility of abrasion of the water pipe is reduced;

3. the water stop valve is driven to open and close by the movement of the washing tank, so that the possibility of backflow of the water pipes on the two sides of the water stop valve is reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the recycle water tank of the present invention;

FIG. 3 is a schematic structural view of the middle-highlighting link mechanism of the present invention;

fig. 4 is an enlarged schematic view of a portion a of fig. 2.

In the figure: 1. installing a box; 11. a toilet tank; 12. a toilet bowl; 13. a water inlet pipe; 14. a faucet; 15. a first water outlet pipe; 16. a water pump; 17. a second water outlet pipe; 18. a water stop valve; 19. a third water outlet pipe; 2. a recovery water tank; 21. a guide rail; 211. a dovetail block; 212. a dovetail groove; 22. mounting a plate; 23. a washing tank; 24. a hose; 3. a circular valve seat; 31. an arc-shaped through hole; 32. a valve plate; 33. a valve stem; 34. a valve body; 35. an elastic member; 4. a link mechanism; 41. a first link; 42. a second link; 43. a support member; 44. a pressing member; 45. a mating component; 451. a bevel; 46. a limiting component; 461. an extension rod; 462. a limiting rod; 463. a connecting rod; 464. sinking a groove; 5. a guide assembly; 51. a guide shaft; 52. and a circular through hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example (b): an environment-friendly washstand applied to a fabricated public toilet, as shown in fig. 1 and 2, comprises a mounting case 1; a toilet water tank 11 is fixed on one side of the installation box 1, and a toilet 12 is fixed on one side, far away from the installation box 1, of the toilet water tank 11. A water inlet pipe 13 penetrates through and is fixed in the installation box 1, and a water faucet 14 is installed at one end, far away from the closestool 12, of the water inlet pipe 13. A first water outlet pipe 15 is fixed on one side, close to the installation box 1, of the toilet water tank 11, and the first water outlet pipe 15 penetrates and is fixed on one side, close to the toilet water tank 11, of the installation box 1. A water pump 16 is fixed at one end, far away from the toilet water tank 11, of the first water outlet pipe 15, a second water outlet pipe 17 is fixed at one side, far away from the first water outlet pipe 15, of the water pump 16, a water stop valve 18 is fixed at one end, far away from the water pump 16, of the second water outlet pipe 17, a third water outlet pipe 19 is fixed at one side, far away from the second water outlet pipe 17, of the water stop valve 18, and a recovery water tank 2 is fixed at one end, far away from. One side of the recovery water tank 2, which is far away from the third water outlet pipe 19, is fixedly connected with the inner side wall of one side of the installation box 1, which is close to the water faucet 14. The relative inside wall of installing case 1 is fixed with guide rail 21 respectively, and two guide rails 21 slide along installing case 1 length direction and are connected with mounting panel 22. A washing tub 23 is fixed on the top of the mounting plate 22. The bottom of the washing tank 23 is fixed with a hose 24, and the hose 24 is far away from one end of the washing tank 23 and fixedly connected with the top of the recycling water tank 2. The hose 24 is fixed to the mounting plate 22, and the washing tank 23 is connected to the recovery tank 2 through the hose 24. A through hole for the washing tank 23 to pass through is opened at one side of the mounting box 1 close to the water tap 14. After outwards pulling out the washing tank 23, tap 14 is located washing tank 23 top, and the rivers in the washing tank 23 flow into in the recovery water tank 2 downwards through hose 24 to in flowing into second outlet pipe 17 through check valve 18 by third outlet pipe 19, open water pump 16 back, water flows through in second outlet pipe 17 flows into first outlet pipe 15, and flows into in the closestool water tank 11 by first outlet pipe 15.

As shown in fig. 4, two dovetail blocks 211 are respectively fixed at two ends of the mounting plate 22, two dovetail grooves 212 are respectively formed on opposite inner sides of the two guide rails 21, and in combination with fig. 1, the two dovetail blocks 211 are connected with the two dovetail grooves 212 in a sliding manner in the length direction of the mounting box 1 in a one-to-one correspondence manner. Dovetail slots 212 provide a guide for dovetail block 211, reducing the likelihood of mounting plate 22 deviating from the track as it moves along the length of mounting housing 1.

As shown in fig. 3, the water stop valve 18 includes a circular valve seat 3 fixedly connected to the third water outlet pipe 19, an arc through hole 31 opened on the outer peripheral surface of the circular valve seat 3, a valve plate 32 vertically slidably disposed in the arc through hole 31, a valve rod 33 fixed on the top of the valve plate 32, and a valve body 34 fixed on the inner bottom surface of the mounting box 1. The valve body 34 is U-shaped in cross-section. The valve plate 32 includes a square plate fixedly connected to the bottom of the valve rod 33 and a semicircular plate fixed to the bottom of the square plate. One side of the circular valve seat 3 close to the water pump 16 is fixedly connected with a second water outlet pipe 17. Referring to fig. 2, a link mechanism 4 for driving the valve rod 33 to move upward is provided between the valve rod 33 and the mounting plate 22. An elastic member 35 for restoring the valve rod 33 is provided between the valve rod 33 and the valve body 34. A guide assembly 5 for driving the valve rod 33 to move vertically is disposed between the valve rod 33 and the valve body 34. After the valve rod 33 moves vertically downwards, the valve plate 32 blocks the water flow between the second water outlet pipe 17 and the third water outlet pipe 19, and the water stop valve 18 is in a closed state. The valve rod 33 is driven by the link mechanism 4 to ascend, the valve plate 32 moves upward, a gap is formed between the valve plate 32 and the inner peripheral surface of the valve seat, and water flows in or out through the gap.

As shown in fig. 2 and 3, the link mechanism 4 includes a first link 41 hinged to the bottom of the mounting plate 22, a second link 42 hinged to an end of the first link 41 away from the mounting plate 22, a support 43 perpendicularly fixed to an end of the second link 42 away from the first link 41, a pressing member 44 fixed to an outer peripheral surface of the valve stem 33, and a fitting assembly 45 disposed between the support 43 and the pressing member 44. The first connecting rod 41 comprises a first inclined rod hinged with the bottom of the mounting plate 22 and a first vertical rod fixed at the bottom of the first inclined rod, and the second connecting rod 42 comprises a second vertical rod hinged with the first vertical rod and far away from one end of the first inclined rod, and a second inclined rod fixed at the second vertical rod and far away from one end of the first vertical rod. The bottom of the mounting plate 22 is fixed with a hinge member, and the first inclined rod is hinged with the hinge member. A limiting component 46 for driving the second vertical rod to rotate is arranged between the second vertical rod and the valve body 34. When the washing tank 23 is moved to one side close to the tap 14, the first link 41 is moved along with the washing tank 23 near one end of the washing tank 23, the first link 41 is away from one end of the washing tank 23 and drags the second link 42 to one side close to the tap 14, the second link 42 rotates under the action of the limiting component 46, and the driving support 43 is close to the pressing component 44.

As shown in fig. 3, the engaging assembly 45 includes two inclined surfaces 451 respectively opened at opposite inner sides of the supporting member 43 and the pressing member 44. After the supporting piece 43 contacts with the pressing piece 44, the supporting piece 43 presses the pressing piece 44 upwards through the inclined surface 451, and drives the pressing piece 44 to move upwards; after the second link 42 continues to rotate, the supporting member 43 is located below the pressing member 44 and drives the pressing member 44 to move upward, and the pressing member 44 drives the valve rod 33 to move upward.

As shown in fig. 3, the position-limiting assembly 46 includes an extending rod 461 fixed on the top of the valve body 34, a position-limiting rod 462 fixed on the bottom of the extending rod 461, and a connecting rod 463 hinged to the second vertical rod, wherein one end of the connecting rod 463 far away from the second vertical rod is connected to the extending rod 461 in a sliding manner along the vertical direction. The second vertical rod is close to first vertical rod one end and has seted up heavy groove 464, and connecting rod 463 is close to and keeps away from extension rod 461 one end and is articulated with heavy groove 464. The connecting rod 463 provides a limiting function for the second connecting rod 42, when the first connecting rod 41 moves towards the side close to the faucet 14 along with the washing tank 23, the connecting rod 463 moves upwards along the vertical direction under the limiting function of the limiting rod 462, and the second connecting rod 42 rotates by taking one end of the connecting rod 463 far away from the valve rod 33 as an axis.

As shown in fig. 3, the elastic member 35 is a spring fixed on the top of the valve stem 33, and one end of the spring away from the valve stem 33 is fixedly connected with the inner top surface of the valve body 34. After the valve rod 33 moves upwards, the spring is in a compressed state, and the spring applies upward elastic force to the valve rod 33; after the support member 43 is separated from the pressing member 44, the spring-driven valve rod 33 is returned downward.

As shown in fig. 3, the guide assembly 5 includes a guide shaft 51 fixed to the top of the valve rod 33 and a circular through hole 52 opened at the top of the valve body 34, and the valve rod 33 is slidably disposed on the outer peripheral surface of the guide shaft 51 through the circular through hole 52. The spring is fitted around the guide shaft 51. The guide shaft 51 provides a guide for the circular through hole 52, which facilitates reducing the possibility of the valve stem 33 deviating from the track during vertical movement.

The working principle of the embodiment is as follows:

when the washing tank 23 moves to the side close to the tap 14, one end of the first connecting rod 41 close to the washing tank 23 moves along with the washing tank 23, one end of the first connecting rod 41 far from the washing tank 23 drags the second connecting rod 42 to the side close to the tap 14, the second connecting rod 42 rotates under the action of the limiting assembly 46 and drives the supporting member 43 to approach the pressing member 44, and the supporting member 43 presses the pressing member 44 upwards through the inclined surface 451 and drives the pressing member 44 to move upwards; the second connecting rod 42 continues to rotate, the supporting member 43 is located below the pressing member 44 and drives the pressing member 44 to move upwards, the pressing member 44 drives the valve rod 33 to move upwards, the valve plate 32 moves upwards along with the upward movement, and a gap is formed between the valve plate 32 and the inner circumferential surface of the valve seat. The water flow in the washing tank 23 flows downwards into the recovery water tank 2 through the hose 24, and flows into the second water outlet pipe 17 through the water stop valve 18 by the third water outlet pipe 19, and after the water pump 16 is turned on, the water flows into the first water outlet pipe 15 through the second water outlet pipe 17, and flows into the toilet water tank 11 through the first water outlet pipe 15.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An environment-friendly washstand applied to an assembled public toilet comprises an installation box (1) and a first water outlet pipe (15) fixedly connected with a toilet water tank (11); first outlet pipe (15) are kept away from toilet water tank (11) one end and are fixed with water pump (16), water pump (16) are kept away from first outlet pipe (15) one side is fixed with second outlet pipe (17), second outlet pipe (17) are kept away from water pump (16) one end is fixed with stagnant water valve (18), stagnant water valve (18) are kept away from second outlet pipe (17) one side is fixed with third outlet pipe (19), stagnant water valve (18) one end is kept away from in third outlet pipe (19) and is fixed with recovery water tank (2), its characterized in that: guide rails (21) are respectively fixed on the opposite inner side walls of the installation box (1), and the two guide rails (21) are connected with an installation plate (22) in a sliding manner along the length direction of the installation box (1); a washing tank (23) is fixed on the top of the mounting plate (22); washing basin (23) bottom is fixed with hose (24), washing basin (23) one end and recovery water tank (2) top fixed connection are kept away from to hose (24).

2. The environment-friendly washstand applied to fabricated public lavatory according to claim 1, wherein: two dovetail blocks (211) are fixed with respectively at mounting panel (22) both ends, two dovetail (212), two have been seted up respectively to the relative inboard of guide rail (21) dovetail block (211) one-to-one with two dovetail (212) along install bin (1) length direction connection that slides.

3. The environment-friendly washstand applied to fabricated public lavatory according to claim 1, wherein: the water stop valve (18) comprises a circular valve seat (3) fixedly connected with a third water outlet pipe (19), an arc-shaped through hole (31) formed in the outer peripheral surface of the circular valve seat (3), a valve plate (32) arranged in the arc-shaped through hole (31) in a sliding mode along the vertical direction, a valve rod (33) fixed to the top of the valve plate (32) and a valve body (34) fixed to the inner bottom surface of the installation box (1); one side of the circular valve seat (3) close to the water pump (16) is fixedly connected with a second water outlet pipe (17); a link mechanism (4) for driving the valve rod (33) to move upwards is arranged between the valve rod (33) and the mounting plate (22); an elastic piece (35) for driving the valve rod (33) to reset is arranged between the valve rod (33) and the valve body (34); and a guide assembly (5) for driving the valve rod (33) to move vertically is arranged between the valve rod (33) and the valve body (34).

4. The environment-friendly washstand applied to fabricated public lavatory according to claim 3, wherein: the connecting rod mechanism (4) comprises a first connecting rod (41) hinged with the bottom of the mounting plate (22), a second connecting rod (42) hinged with one end, far away from the mounting plate (22), of the first connecting rod (41), a supporting piece (43) vertically fixed at one end, far away from the first connecting rod (41), of the second connecting rod (42), a pressing piece (44) fixed on the outer peripheral surface of the valve rod (33) and a matching assembly (45) arranged between the supporting piece (43) and the pressing piece (44); and a limiting assembly (46) for driving the second connecting rod (42) to rotate is arranged between the second connecting rod (42) and the valve body (34).

5. The environment-friendly washstand applied to fabricated public toilet as claimed in claim 4, wherein: the matching component (45) comprises two inclined surfaces (451) which are respectively arranged on the opposite inner sides of the supporting part (43) and the pressing part (44).

6. The environment-friendly washstand applied to fabricated public toilet as claimed in claim 4, wherein: spacing subassembly (46) including being fixed in extension rod (461) at valve body (34) top, be fixed in spacing pole (462) of extension rod (461) bottom and with second connecting rod (42) articulated connecting rod (463), connecting rod (463) keep away from second connecting rod (42) one end with extension rod (461) are connected along vertical sliding.

7. The environment-friendly washstand applied to fabricated public lavatory according to claim 3, wherein: elastic component (35) are the spring that is fixed in valve rod (33) top, the spring is kept away from valve rod (33) one end and valve body (34) interior top surface fixed connection.

8. The environment-friendly washstand applied to fabricated public lavatory according to claim 3, wherein: the guide assembly (5) comprises a guide shaft (51) fixed to the top of the valve rod (33) and a circular through hole (52) formed in the top of the valve body (34), and the valve rod (33) is arranged on the outer peripheral surface of the guide shaft (51) in a sliding mode through the circular through hole (52).