Locking device for toilet seat and water tank

Abstract

The utility model belongs to the technical field of installation structures of toilet seats and water tanks, and discloses a locking device of a toilet seat and a water tank, which comprises two locking assemblies, each locking assembly comprises a bolt assembly capable of being installed and limited on each water tank through hole of a water tank, the toilet bowl nut can be installed and limited on each toilet bowl penetrating hole of a toilet bowl seat and is limited to rotate, the bolt assembly comprises a bolt, and the bolt can be pulled and rotated from the upper portion to be locked on the toilet bowl nut in a screwed mode so that the water tank can be installed on the toilet bowl seat. The locking assembly may also include a bolt assembly mounted and locked on the toilet bowl perforations of the toilet bowl seat, and a water tank nut operable from above, the water tank nut being screw-locked with a bolt of the bolt assembly passing through the water tank perforations to mount the water tank to the toilet bowl seat. Therefore, a convenient, rapid and firm assembly effect can be achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of installation structures of toilet seats and water tanks, and in particular to a locking device for assembling a toilet seat and a water tank together. Background Art

[0002] In a typical split-type toilet, the water tank and toilet seat are separated from each other, so they must be assembled and fixed together through various assembly or linking structures or devices. A common assembly structure is to pass two long bolts with waterproof washers through the water tank holes on the left and right sides of the water tank, and then through the toilet holes on the left and right sides of the toilet seat, so that the bolt parts extend downward from the wall behind the toilet seat, and then use nuts to screw and lock, so as to achieve the effect of assembly and locking. For example, China's invention patent with authorization announcement number CN102713097B discloses a similar assembly structure.

[0003] The biggest problem with the above-mentioned assembly structure and installation operation is that: first, although the water tank can be aligned with the toilet hole passing through the toilet seat by the long bolt passing through the water tank holes, the installer or consumer must perform the screwing operation of the nut and the long bolt from the bottom of the wall behind the toilet seat. Since the bottom of the rear of the toilet seat is usually close to the wall, the operating space is small, resulting in inconvenience in screwing or removing the nut.

[0004] Second, the length of the long bolt must be long enough to pass through the toilet hole so that the nut can be screwed and locked. Therefore, a long bolt design must be used. However, the design of a long bolt is not conducive to the alignment and insertion of the hole, especially for inexperienced or general consumers, which will cause difficulties in assembly operation. Secondly, since the long bolt does not have any positioning design to prevent deflection, if it deflects during the assembly process, it will be difficult to accurately and quickly align with the toilet hole and insert it. Once the operation is not careful, the long bolt may also be skewed or otherwise damaged due to collision. Utility Model Content

[0005] The main purpose of the present application is to provide a locking device for a toilet seat and a water tank, which can facilitate subsequent rapid installation on site and improve the simplicity and efficiency of installation.

[0006] To achieve the above-mentioned purpose, the present application provides a locking device for a toilet seat and a water tank, comprising two locking components, the locking component comprising a bolt component that can be installed and limited on each water tank through-hole of a water tank, and a toilet nut that can be installed and limited on each toilet through-hole of a toilet seat and is restricted from rotating, the bolt component comprising a bolt that can be turned and operated from above and screwed on the toilet nut to install the water tank on the toilet seat. The locking component can also include a bolt component that is installed and locked on each toilet through-hole of the toilet seat, and a water tank nut that can be operated from above, the water tank nut can be screwed with a bolt of the bolt component that passes through each water tank through-hole to install the water tank on the toilet seat. Accordingly, a convenient, fast and firm assembly effect can be achieved.

[0007] The embodiment of the present application provides a locking device for a toilet seat and a water tank, wherein the toilet seat has a mounting wall on the upper rear portion, and at least two toilet perforations are arranged on the mounting wall; the water tank has a bottom wall inside, and at least two water tank perforations are arranged on the bottom wall to correspond to the toilet perforations; the locking device includes two locking components, and the locking components include:

[0008] A bolt assembly can be installed in the corresponding water tank through hole from top to bottom inside the water tank; the bolt assembly includes a bolt and a limiting bushing that can allow the bolt to pass through and position; the limiting bushing can be inserted and accommodated in the water tank through hole, and an elastic limiting portion is provided at the bottom end; the elastic limiting portion can stop and limit the relative position at the bottom end of the water tank through hole to limit the bolt assembly from escaping upward from the water tank through hole;

[0009] A toilet nut comprises a through-extension tube portion and a rotation limiting portion connected to one end of the through-extension tube portion; the through-extension tube portion can pass through the corresponding toilet through-hole from bottom to top from below the installation wall of the toilet seat, and an elastic limiting portion is provided at the top end of the through-extension tube portion, and the elastic limiting portion can stop and limit the relative portion at the top end of the toilet through-hole to limit the toilet nut from disengaging downward from the toilet through-hole; the rotation limiting portion can stop at the relative portion of the toilet seat to limit the rotation of the toilet nut; a screw hole is provided in the through-extension tube portion, and the screw hole can be used for the bolt of the bolt assembly to pass through the screw lock to lock the water tank on the toilet seat.

[0010] In some embodiments, the bolt has a screw head portion and a bolt portion extending from the screw head portion; an external thread is formed on the bolt portion for interlocking with the screw hole of the toilet nut; an annular groove is provided on the bolt portion near the screw head portion; a plurality of upper grooves are cut downward from the top of the limiting bushing, and any two adjacent upper grooves jointly define an elastic snap-fit ​​block, and the elastic snap-fit ​​block can elastically shrink after expanding outward to be snap-fitted and limited in the annular groove.

[0011] In some embodiments, an inner peripheral wall of the elastic buckling block is protrudingly provided with an arc-shaped flange, and the arc-shaped flange can be elastically buckled and confined in the annular groove.

[0012] In some embodiments, a plurality of lower grooves are cut upward from the bottom end of the limit bushing, and any two adjacent lower grooves jointly define an elastic limit block, which together constitute the elastic limit portion of the limit bushing and can elastically expand outward after contraction to stop the relative position at the bottom end of the water tank perforation.

[0013] In some embodiments, an arc-shaped flange is protruding from the outer peripheral wall of the elastic limit block, and the arc-shaped flange can stop and limit the relative position at the bottom end of the water tank through hole.

[0014] In some embodiments, the bolt assembly further comprises a waterproof gasket, which can be sleeved on the bolt portion of the bolt and clamped and sealed between the screw head portion of the bolt and the relative portion of the upper surface of the bottom wall around the perforation of the water tank.

[0015] In some embodiments, a plurality of grooves are cut downward from the top of the extending tube portion of the toilet nut, and an elastic limit block is defined between any two adjacent grooves. The elastic limit blocks together constitute the elastic limit portion of the toilet nut, and can elastically expand after shrinking to stop the relative position at the top of the toilet perforation.

[0016] In some embodiments, the toilet seat is formed with a retaining wall below its mounting wall; abutment wall is formed on the rotation limiting portion of the toilet nut, and the bottom wall can lean against the retaining wall to limit the rotation of the toilet nut.

[0017] The embodiment of the present application also provides a locking device for a toilet seat and a water tank, wherein the toilet seat has a mounting wall on the upper rear part, and at least two toilet perforations are arranged on the mounting wall; the water tank has a bottom wall inside, and at least two water tank perforations are arranged on the bottom wall to correspond to the toilet perforations; the locking device includes two locking components, and the locking components include:

[0018] A bolt assembly can be installed from the bottom to the top in the corresponding toilet through-hole from the bottom of the toilet seat installation wall, and the bolt assembly includes a bolt and an intermediate nut for screwing and locking the bolt on the installation wall; the bolt can pass through the corresponding water tank through-hole from the bottom to the top;

[0019] The water tank nut can be screwed with the bolt from inside the water tank to lock the water tank on the toilet seat.

[0020] In some embodiments, the intermediate nut is a quick nut.

[0021] In some embodiments, the bolt has a screw head portion, and a bolt portion extending from the screw head portion and capable of being screwed by the intermediate nut; the bolt assembly also includes a positioning bushing, which can be sleeved on the bolt portion of the bolt, and the positioning bushing has a sleeve portion, and a washer portion extending from one end of the sleeve portion; the sleeve portion can be penetrated and set in the toilet penetration; the washer portion can be clamped on the screw head portion, and the toilet seat is located between the relative portions of the lower surface of the mounting wall around the bottom end of the toilet penetration.

[0022] In some embodiments, the water tank nut has a turning portion that can be turned by a user.

[0023] In some embodiments, the water tank nut has a plate-like base and a cap portion extending integrally from the top end surface of the plate-like base; the plate-like base is used to press against the upper surface of the bottom wall inside the water tank; two wings are symmetrically protruded from the peripheral wall of the cap portion; the cap portion and the wings together constitute the pulling part.

[0024] In some embodiments, a screw hole is provided on the bottom end surface of the water tank nut along the axial direction upwards, and the screw hole extends through the plate-like base and a portion of the cap portion to be screwed onto the bolt; an operating hole is provided on the top wall surface of the water tank nut along the axial direction downwards; the operating hole is used for a tool to be nested and positioned to rotate the water tank nut, and an isolation portion is formed between the operating hole and the screw hole.

[0025] In some embodiments, the locking assembly includes a waterproof gasket, which is used to be sleeved on the bolt and clamped and sealed between the water tank nut and the upper surface of the bottom wall inside the water tank.

[0026] The beneficial effect of the present application is that the locking device provided by the present application can be assembled in the factory in advance in some steps, so it is convenient for installers or consumers to quickly install it on site later, thereby improving the simplicity and efficiency of installation.

[0027] The locking device provided in the present application can finally be tightened by the installer or consumer from above the water tank through the bolts or water tank nuts at the inner bottom wall. Therefore, the installer or consumer does not need to install it in the narrow space below the installation wall of the toilet seat, and can easily and intuitively perform the installation operation from above, so it is ergonomically designed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a three-dimensional appearance diagram of the assembled state of the toilet and water tank of the first embodiment of the present application.

[0029] Figure 2 This is a three-dimensional exploded view of the toilet and water tank in the exploded state of the first embodiment of the present application.

[0030] Figure 3 It is a partial side cross-sectional view of the toilet and water tank at the assembly position according to the first embodiment of the present application.

[0031] Figure 4 for Figure 3 A partial enlarged view of the assembly position on the right.

[0032] Figure 5 It is a three-dimensional exploded view of the locking assembly of the first embodiment of the present application.

[0033] Figure 6 It is a side cross-sectional view of the locking assembly of the first embodiment of the present application.

[0034] Figure 7 This is another side cross-sectional view of the locking assembly of the first embodiment of the present application.

[0035] Figure 8 This is a three-dimensional exploded view of the locking assembly of the second embodiment of the present application.

[0036] Fig. 9 This is a partial side cross-sectional view of the toilet and water tank at the assembly position according to the second embodiment of the present application.

[0037] Fig.10 for Fig. 9 A partial enlarged view of the assembly position on the right.

[0038] Fig.11 It is a side cross-sectional view of a locking assembly according to the second embodiment of the present application.

[0039] Fig.12 This is another side cross-sectional view of the locking assembly of the second embodiment of the present application.

[0040] Among them, the reference numerals in the figure are:

[0041] 10: toilet seat; 11: mounting wall; 111, 211: lower surface; 112: water inlet hole; 12: toilet perforation; 13: retaining wall; 20: water tank; 21: bottom wall; 212: upper surface; 213: drain hole; 22: water tank perforation; 300: locking device; 30, 30a: locking assembly; 301, 302: bolt assembly; 31, 35: bolt; 311, 351: screw head part; 312, 352: bolt part; 313: external thread; 314: annular groove; 32: limiting bushing; 321, 333: elastic limiting part; 322: upper groove; 323: elastic buckle block; 324, 32 7: arc flange; 325: lower groove; 326, 336: elastic limit block; 33: toilet nut; 331: extension pipe; 332: rotation limit part; 334, 375: screw hole; 335: groove; 337: wall; 34, 39: waterproof gasket; 36: middle nut; 361: half screw thread; 37: water tank nut; 371: pull part; 372: plate base; 373: cap; 374: wing; 376: operation hole; 377: isolation part; 38: positioning bushing; 381: sleeve part; 382: gasket part; 40: water pipe group; 41: drain pipe; 42: locking ring; 43: sealing ring. DETAILED DESCRIPTION

[0042] First embodiment

[0043] like Figures 1 to 4 As shown, the present application provides an embodiment of a locking device for a toilet seat and a water tank, wherein the toilet seat 10 has a mounting wall 11 on the upper rear portion, and at least two toilet through-holes 12 are arranged on the mounting wall 11, such as two toilet through-holes 12 symmetrically on the left and right. The water tank 20 has a bottom wall 21 inside, and at least two water tank through-holes 22 are arranged on the bottom wall 21, such as two water tank through-holes 22 symmetrically on the left and right, respectively corresponding to the toilet through-holes 12; the locking device 300 includes two locking components 30, and the locking components 30 further include:

[0044] A bolt assembly 301, such as Figures 5 to 7 As shown, the bolt assembly 301 can be installed from top to bottom in a corresponding water tank through hole 22 from the inside of the water tank 20, and includes a bolt 31 and a limiting bushing 32 for the bolt 31 to pass through and position; the limiting bushing 32 can be inserted and accommodated in the water tank through hole 22, and an elastic limiting portion 321 is provided at the bottom end, which can stop and limit the relative position at the bottom end of the water tank through hole 22 to limit the bolt assembly 301 from upwardly escaping from the water tank through hole 22. The relative position at the bottom end of the water tank through hole 22 refers to the adjacent position at the bottom end of the water tank through hole 22, including the aperture portion of the water tank through hole 22 or the lower surface 211 of the bottom wall 21.

[0045] A toilet nut 33 has a through-tube portion 331 and a rotation-limiting portion 332 connected to one end of the through-tube portion 331; the through-tube portion 331 can pass through a corresponding toilet through-hole 12 from bottom to top from below the mounting wall 11 of the toilet seat 10, and an elastic limiting portion 333 is provided at the top of the through-tube portion 331, which can stop and limit the relative portion at the top of the toilet through-hole 12 to limit the toilet nut 33 from disengaging from the toilet through-hole 12 downward. The relative portion at the top of the toilet through-hole 12 refers to the adjacent portion at the top of the toilet through-hole 12, including the aperture portion of the toilet through-hole 12 or the upper surface of the mounting wall 11. The rotation limiting portion 332 can be stopped at a corresponding portion of the toilet seat 10 to limit the rotation of the toilet nut 33; a screw hole 334 is provided in the extending tube portion 331, through which the bolt 31 of the bolt assembly 301 can be extended and screwed to lock the water tank 20 on the toilet seat 10.

[0046] In this embodiment, if Figures 5 to 7 As shown, the bolt 31 has a screw head portion 311 and a bolt portion 312 extending from the screw head portion 311; an external thread 313 is formed on the bolt portion 312, and the external thread 313 is used to screw with the screw hole 334 of the toilet nut 33; the bolt portion 312 is provided with an annular groove 314 near the screw head portion 311; the limiting bushing 32 is provided with a plurality of upper grooves 322 downward from the top, and any two adjacent upper grooves 322 jointly define an elastic snap-fit ​​block 323, and the elastic snap-fit ​​block 323 can be elastically contracted after expanding outward to be snap-fitted to the annular groove 314.

[0047] In this embodiment, an arc-shaped flange 324 is protruded from the inner wall of each elastic buckling block 323 , and the arc-shaped flange 324 can be used for the elastic buckle to be limited in the annular buckle groove 314 .

[0048] In this embodiment, if Figure 5-7 As shown, a plurality of lower grooves 325 are cut upward from the bottom end of the limit bushing 32, and any two adjacent lower grooves 325 define an elastic limit block 326 between each other. The elastic limit blocks 326 together constitute the elastic limit portion 321 of the limit bushing 32, and can elastically expand outward after contraction to block the relative position at the bottom end of the water tank perforation 22.

[0049] In this embodiment, if Figure 5-7 As shown, the outer peripheral wall of the elastic limiting block 326 is protruded with an arc-shaped flange 327, which can be used to stop and limit the corresponding position at the bottom end of the water tank through hole 22.

[0050] The bolt assembly 301 also includes a waterproof gasket 34, which can be put on the bolt part 312 of the bolt 31 and clamped and sealed at the relative position between the screw head part 311 of the bolt 31 and the upper surface 212 of the bottom wall 21; the relative position of the upper surface 212 of the bottom wall 21 is located around the water tank through hole 22.

[0051] It should be noted that the design of the waterproof gasket 34 can effectively prevent the flushing water in the water tank 20 from leaking downward from the gap between the screw head portion 311 of the bolt 31 and the bottom wall 21 of the water tank 20. The screw head portion 311 of the bolt 31 can adopt a common slot structure such as a straight slot or a cross slot, so that the user can easily use a straight screwdriver or a cross screwdriver to insert and locate in the slot structure for rotation operation.

[0052] In this embodiment, if Figure 5-7 As shown, a plurality of grooves 335 are cut downward from the top edge of the through-tube portion 331 of the toilet nut 33, and an elastic limit block 336 is defined between any two adjacent grooves 335. The elastic limit blocks 336 can together constitute the elastic limit portion 333 of the toilet nut 33, and can elastically expand after shrinking to block the relative position at the top of the toilet perforation 12.

[0053] It should be particularly noted that the design of the elastic limiting portion 333 is to prevent the toilet nut 33 from falling downward from the toilet perforation 12. Preferably, when the toilet nut 33 is in a pre-positioned state before being screwed together with the bolt 31, its rotation limiting portion 332 can maintain a distance from the lower surface 111 of the mounting wall 11 of the toilet seat 10. In this way, when the bolt 31 is gradually screwed and locked on the toilet nut 33, the rotation limiting portion 332 can be allowed to move upward along the axial direction, and then be tightened and fixed to the lower surface 111 of the mounting wall 11, thereby successfully completing the locking and tightening.

[0054] In this embodiment, the toilet seat 10 is formed with a retaining wall 13 below the mounting wall 11; the rotation limiting portion 332 of the toilet nut 33 is formed with a supporting wall 337, which can be abutted against the retaining wall 13 to limit the rotation of the toilet nut 33. Figure 4 shown.

[0055] Second embodiment

[0056] like Figures 8 to 12 As shown, this embodiment provides a locking device for a toilet seat and a water tank. The locking assembly 30a of the locking device 300 of this embodiment is substantially similar to the locking assembly 30 of the locking device 300 of the first embodiment. More specifically, the locking assembly 30a of this embodiment includes:

[0057] A bolt assembly 302 can be installed from the bottom up on a corresponding toilet through-hole 12 from the bottom of the mounting wall 11 of the toilet seat 10; the locking assembly 30a includes a bolt 35 and an intermediate nut 36 for screwing and locking the bolt 35 on the mounting wall 11; the bolt 35 can pass through a corresponding water tank through-hole 22 from the bottom up.

[0058] A water tank nut 37 can be screwed with the bolt 35 from inside the water tank 20 to lock the water tank 20 on the toilet seat 10.

[0059] In this embodiment, if Fig.12 As shown, the intermediate nut 36 is a quick nut, for example, having two opposite and staggered half-threads 361, which can be quickly inserted and installed on the bolt 35 at an appropriate tilt angle, and then the half-threads 361 are screwed into the bolt 35 by turning it straight. After that, the locking effect can be quickly achieved by slightly turning and tightening it.

[0060] It should be noted that the quick-install nut is a known technology and is not the technical focus of the present application, so only a brief description is given. However, it is applied in this embodiment to effectively improve the assembly speed and efficiency. Without being limited to this, traditional nuts can also be used, but there is a difference in assembly speed.

[0061] In this embodiment, if Figure 8-12 As shown, the bolt 35 has a screw head portion 351 and a bolt portion 352 extending from the screw head portion 351, and the bolt portion 352 can be screwed into the intermediate nut 36; the bolt assembly 302 also includes a positioning sleeve 38, which can be sleeved on the bolt portion 352 of the bolt 35, and the positioning sleeve 38 has a sleeve portion 381 and a washer portion 382 extending from one end of the sleeve portion 381; the sleeve portion 381 can be penetrated and set in the toilet penetration 12; the washer portion 382 can be clamped between the screw head portion 351 and the relative portion of the lower surface 111 of the mounting wall 11, and the relative portion of the lower surface 111 of the mounting wall 11 is located around the bottom end of the toilet penetration 12.

[0062] In this embodiment, if Figure 8 As shown, the water tank nut 37 has a pull portion 371 for the user to rotate.

[0063] In this embodiment, if Figure 8As shown, the water tank nut 37 has a plate-like base 372 and a cap portion 373 extending integrally from the top end surface of the plate-like base 372; the plate-like base 372 is used to press against the upper surface of the bottom wall 21 inside the water tank 20; the surrounding wall of the cap portion 373 is symmetrically protruded with two wings 374, which can together constitute the pulling part 371.

[0064] In this embodiment, if Figure 8-12 As shown, the bottom wall surface of the water tank nut 37 is provided with a screw hole 375 axially upward; the screw hole 375 passes through the plate-like base 372 and a part of the cap 373 to be screwed on the bolt 35, and the top surface of the water tank nut 37 is provided with an operation hole 376 axially downward, and the operation hole 376 can be used for a tool to nest and position and rotate the water tank nut 37, and an isolation portion 377 is formed between the operation hole 376 and the screw hole 375. It can be easily understood that the screw hole 375 can be isolated from the operation hole 376 by the isolation portion 377 so that they are not connected to each other, and the water in the water tank 20 can be prevented from infiltrating into the screw hole 375. Secondly, the operation hole 376 can be a common hexagonal hole, so that the user can use a common hexagonal wrench to rotate it, but it is not limited to this, and it can also be other nesting matching methods and turning tools.

[0065] In this embodiment, the locking assembly 30 a further includes a waterproof gasket 39 , which can be sleeved on the bolt 35 and clamped and sealed between the water tank nut 37 and the upper surface of the bottom wall 21 inside the water tank 20 .

[0066] It should be noted that the design of the waterproof gasket 39 can effectively prevent the flushing water in the water tank 20 from leaking downward from the gap between the water tank nut 37 and the bottom wall 21 of the water tank 20. Secondly, the water tank nut 37 is provided with the turning part 371 and the operation hole 376, so that the installer can easily turn the turning part 371 manually, or choose to use a common hexagonal wrench or other general or special tools to insert and locate in the operation hole 376 for turning operation.

[0067] In the first and second embodiments above, if Figures 2 to 4 ,as well as Fig. 9 , 10 As shown, the installation wall 11 of the toilet seat 10 is provided with a water inlet hole 112; the bottom wall 21 of the water tank 20 is correspondingly provided with a water drain hole 213; a water pipe assembly 40 is installed and connected between the water inlet hole 112 and the water drain hole 213. Preferably, the locking device 300 includes two locking components 30 or two locking components 30a, which are symmetrically arranged on the left and right sides of the water pipe assembly 40.

[0068] Furthermore, the standard water pipe assembly 40 includes a drain pipe 41, a locking ring 42 and a sealing ring 43; the drain pipe 41 can be embedded and positioned on the drain hole 213 from the inside of the water tank 20; the locking ring 42 can be screwed on the drain pipe 41 from the bottom to lock the drain pipe 41 at the drain hole 213 of the water tank 20; the sealing ring 43 can be set upward and positioned at the bottom end of the drain pipe 41, and then be clamped and pressed between the conical inner hole wall of the water inlet hole 112 and the lower surface 211 of the bottom wall 21.

[0069] It should be noted that the water pipe assembly 40 belongs to known technology and is not the technical focus of this application. The main purpose is to obtain the ideal and feasible configuration position of the locking assembly 30 through the relative position relationship between the locking assembly 30 and the water pipe assembly 40.

[0070] Through the description of the first embodiment, it can be clearly understood that before the water tank 20 leaves the factory or is delivered to the consumer, the bolt assembly 301 can be pre-installed on each water tank through-hole 22 of the water tank 20. Therefore, before installing the water tank 20, the consumer only needs to install the toilet nut 33 on each toilet through-hole 12 of the toilet seat 10 at an angle that can be restricted from rotation. Then, the water tank 20 is lifted up, and the bolt portion 31 protruding from the bottom of the water tank 20 is aligned with each toilet nut 33, and then the water tank 20 is placed downward. In this way, the bolt 31 and the toilet nut 33 can be screwed together and tightened by turning, so that the water tank 20 can be easily locked firmly to the toilet seat 10.

[0071] Similarly, through the description of the second embodiment, it can be clearly understood that before assembling the water tank 20, the consumer can pre-install the bolt assembly 302 on each toilet through-hole 12 of the toilet seat 10. Therefore, the consumer only needs to lift the water tank 20, align the water tank through-hole 22 with the bolt portion 352 of each bolt 35, and then place the water tank 20 downward. The bolt portion 352 of the bolt 35 can be easily penetrated upward from the water tank through-hole 22 of the water tank 20 into the water tank 20. After that, the waterproof gasket 39 is put on the bolt portion 352 of each bolt 35, and then the water tank nut 37 is screwed and tightened on the bolt portion 352, so that the water tank 20 can be easily locked firmly to the toilet seat 10.

[0072] It can be seen from the installation operation steps of the first and second embodiments that the installer or consumer finally tightens the screw head portion 311 of the bolt 31 or the water tank nut 37 from the inside of the water tank 20. Therefore, this installation mode is generally referred to as "top installation", and can also be understood as a "locking" or "top operation" installation mode in which the screws are locked from above. The advantage of this installation mode is that the installer or consumer does not need to perform installation and subsequent disassembly operations in the narrow space below the toilet seat 10 installation wall 11. Therefore, the installation operation can be easily and intuitively performed from above. Therefore, this structural design and operation method are very ergonomic.

[0073] Since some of the above steps can be pre-assembled in the factory, it is convenient for installers or consumers to quickly install on site later, which not only improves the ease and efficiency of installation, but also avoids assembly difficulties for people with little assembly experience or general consumers.

[0074] Since the intermediate nut 36 of the second embodiment can be selected to be a quick-install nut, the ease and efficiency of installation can be further improved.

[0075] The bolt assemblies 301 and 302 of the present application can be pre-installed, limited or locked on each water tank perforation 22 or toilet perforation 12, so that it can ensure that the bolts 31 and 35 will not be skewed after assembly, which helps to accurately and quickly align the toilet nut 33 or the water tank perforation 22 later, thereby effectively preventing the bolts 31 and 35 from being damaged by collision, such as skewness, during the operation of placing the water tank 20 on the toilet seat 10.

[0076] The toilet nut 33 of the first embodiment is designed with a through-tube portion 331 that can pass upward through each toilet through-hole 12. Therefore, the bolt 31 that is used to screw with the through-tube portion 331 can be designed to be appropriately shortened in length, which is also conducive to the accurate and rapid alignment and screwing of the bolt 31 and the toilet nut 33 with each other. Especially for inexperienced or general consumers, such a design will greatly reduce the difficulty in assembly operations.

[0077] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A locking device for a toilet seat and a water tank, characterized in that: The rear upper part of the toilet seat has a mounting wall, and at least two toilet holes are arranged on the mounting wall; the water tank has a bottom wall inside, and at least two water tank holes are arranged on the bottom wall to correspond to the toilet holes; the locking device includes two locking components, and the locking components include: A bolt assembly can be installed in the corresponding water tank through hole from top to bottom inside the water tank; the bolt assembly includes a bolt and a limiting bushing that can allow the bolt to pass through and position; the limiting bushing can be inserted and accommodated in the water tank through hole, and an elastic limiting portion is provided at the bottom end; the elastic limiting portion can stop and limit the relative position at the bottom end of the water tank through hole to limit the bolt assembly from escaping upward from the water tank through hole; A toilet nut comprises a through-extension tube portion and a rotation limiting portion connected to one end of the through-extension tube portion; the through-extension tube portion can pass through the corresponding toilet through-hole from bottom to top from below the installation wall of the toilet seat, and an elastic limiting portion is provided at the top end of the through-extension tube portion, and the elastic limiting portion can stop and limit the relative portion at the top end of the toilet through-hole to limit the toilet nut from disengaging downward from the toilet through-hole; the rotation limiting portion can stop at the relative portion of the toilet seat to limit the rotation of the toilet nut; a screw hole is provided in the through-extension tube portion, and the screw hole can allow the bolt of the bolt assembly to extend and screw in, so as to lock the water tank on the toilet seat.

2. The locking device for a toilet seat and a water tank as claimed in claim 1, characterized in that: The bolt has a screw head portion and a bolt portion extending from the screw head portion; an external thread is formed on the bolt portion for threading with the screw hole of the toilet nut; an annular groove is provided on the bolt portion near the screw head portion; a plurality of upper grooves are cut downward from the top of the limiting bushing, and any two adjacent upper grooves jointly define an elastic snap-fit ​​block, and the elastic snap-fit ​​block can elastically shrink after expanding outward to be snap-fitted and limited in the annular groove.

3. The locking device for a toilet seat and a water tank as claimed in claim 2, characterized in that: An arc-shaped flange is protrudingly provided on the inner peripheral wall of the elastic buckling block, and the arc-shaped flange can be elastically buckled and limited in the annular clamping groove.

4. The locking device for a toilet seat and a water tank as claimed in claim 1, characterized in that: A plurality of lower grooves are cut upward from the bottom end of the limit bushing, and any two adjacent lower grooves define an elastic limit block together. The elastic limit blocks together constitute the elastic limit portion of the limit bushing, and can elastically expand outward after contraction to stop the relative position at the bottom end of the water tank perforation.

5. The locking device for a toilet seat and a water tank as claimed in claim 4, characterized in that: An arc-shaped flange is protrudingly provided on the outer peripheral wall of the elastic limiting block, and the arc-shaped flange can stop and limit the corresponding position at the bottom end of the water tank through hole.

6. The locking device for a toilet seat and a water tank as claimed in claim 2, characterized in that: The bolt assembly also includes a waterproof gasket, which can be sleeved on the bolt portion of the bolt and clamped and sealed between the screw head portion of the bolt and the corresponding portion of the upper surface of the bottom wall around the water tank through hole.

7. The locking device for a toilet seat and a water tank as claimed in claim 1, characterized in that: A plurality of grooves are cut downward from the top of the extending tube portion of the toilet nut, and an elastic limit block is defined between any two adjacent grooves. The elastic limit blocks together constitute the elastic limit portion of the toilet nut, and can elastically expand after shrinking to block the relative position at the top of the toilet perforation.

8. The locking device for a toilet seat and a water tank as claimed in claim 2, characterized in that: The toilet seat is provided with a retaining wall below its installation wall; the rotation limiting portion of the toilet nut is provided with an abutting wall, and the bottom wall can be abutted against the retaining wall to limit the rotation of the toilet nut.

9. A locking device for a toilet seat and a water tank, characterized in that: The toilet seat has a mounting wall on the upper rear part, and at least two toilet holes are arranged on the mounting wall; the water tank has a bottom wall inside, and at least two water tank holes are arranged on the bottom wall to correspond to the toilet holes; the locking device includes two locking components, and the locking components include: A bolt assembly can be installed from the bottom to the top in the corresponding toilet through-hole from the bottom of the toilet seat installation wall, and the bolt assembly includes a bolt and an intermediate nut for screwing and locking the bolt on the installation wall; the bolt can pass through the corresponding water tank through-hole from the bottom to the top; The water tank nut can be screwed with the bolt from inside the water tank to lock the water tank on the toilet seat.

10. The locking device for a toilet seat and a water tank as claimed in claim 9, characterized in that: The middle nut is a quick nut.

11. The locking device for a toilet seat and a water tank as claimed in claim 9, characterized in that: The bolt has a screw head portion, and a bolt portion extending from the screw head portion and capable of being screwed with the intermediate nut; the bolt assembly also includes a positioning bushing, which can be sleeved on the bolt portion of the bolt, and the positioning bushing has a sleeve portion, and a washer portion extending from one end of the sleeve portion; the sleeve portion can be penetrated and set in the toilet penetration; the washer portion can be clamped on the screw head portion, and the toilet seat is located between the relative portions of the lower surface of the mounting wall around the bottom end of the toilet penetration.

12. The locking device for a toilet seat and a water tank as claimed in claim 9, characterized in that: The water tank nut is provided with a turning portion, which can be rotated by a user.

13. The locking device for a toilet seat and a water tank as claimed in claim 12, characterized in that: The water tank nut has a plate-like base and a cap portion extending integrally from the top end surface of the plate-like base; the plate-like base is used to press against the upper surface of the bottom wall inside the water tank; the peripheral wall of the cap portion is symmetrically protruded with two wings; the cap portion and the wings together constitute the pulling part.

14. The locking device for a toilet seat and a water tank as claimed in claim 13, characterized in that: A screw hole is provided on the bottom end surface of the water tank nut along the axial direction upwards, and the screw hole extends through the plate-like base and a part of the cap portion to be screwed onto the bolt; an operating hole is provided on the top wall surface of the water tank nut along the axial direction downwards; the operating hole is used for a tool to be nested and positioned to rotate the water tank nut, and an isolation portion is formed between the operating hole and the screw hole.

15. The locking device for a toilet seat and a water tank as claimed in claim 13, characterized in that: The locking assembly includes a waterproof gasket, which is used to be sleeved on the bolt and is clamped and sealed between the water tank nut and the upper surface of the bottom wall inside the water tank.

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