Automatic flushing device for toilet

Abstract

The present invention belongs to the technical field of flush toilets, and specifically relates to an automatic flushing device for toilets. It comprises. The water device has a shell that can be installed at the bottom of a water tank, and the shell includes a water inlet shell section, a closed shell section, and a water outlet shell section from top to bottom; a first seal is provided between the water inlet shell section and the closed shell section, and a second seal is provided between the closed shell section and the water outlet shell section, wherein the water inlet shell section is used to control the water inlet of the water tank, the closed shell section is used to set the motion structure, and the water outlet shell section is used to control the flushing of the water tank. The flushing device is easy to install and can realize automatic control of water inlet and flushing of the toilet. The device adopts a closed design, and the core motion structure is not exposed to water, which avoids erosion and aging and has high reliability. The outer surface of the device is neat and smooth, without complex surfaces or structures, and is not easy to adhere to dirt. It is clean and hygienic and has a reliable structure.

Description

Technical Field

[0001] The invention belongs to the technical field of flush toilets, and particularly relates to an automatic flushing device for a toilet. Background Art

[0002] Flush toilets are widely used due to their convenience, cleanliness, and hygiene. To accommodate varying water supply conditions, most flush toilets have a water tank at the rear to ensure adequate flushing water volume. A flush mechanism is typically located within the tank, controlling the opening and closing of a flow channel at the bottom of the tank to achieve controlled flushing.

[0003] During the implementation of the present invention, we found that existing flushing devices generally have relatively complex moving structural parts, and these moving parts are directly immersed in the water tank, such as the flushing device provided by patent CN213625882U and the flushing tank device provided by patent CN 105986607 B. At present, the moving structural parts of flushing devices are mostly made of plastic materials. During long-term immersion, they are accelerated to age due to the erosion of aquatic microorganisms. In addition, the moving structural parts of flushing devices often have complex outer surfaces, which are prone to dirt adhesion during the immersion process, which not only accelerates aging, but also affects the execution of normal flushing actions. It is precisely because of the existence of the above problems that the reliability of existing flushing devices is generally low, daily maintenance is relatively frequent, and the service life is relatively short.

[0004] In addition, the existing flushing device mainly controls the flushing by manual pressing and is unable to perform automatic control and intelligent operation. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides an automatic flushing device for a toilet.

[0006] The automatic flushing device for a toilet provided by the present invention has a shell that can be installed at the bottom of a water tank. For example, an external thread is provided at the bottom of the shell to cooperate with the thread at the bottom of the water tank; the shell includes, from top to bottom, a water inlet shell section, a closed shell section, and a water outlet shell section; a first sealing member is provided between the water inlet shell section and the closed shell section, and a second sealing member is provided between the closed shell section and the water outlet shell section; wherein the first sealing member and the second sealing member can be sealing rings made of materials such as rubber and silicone.

[0007] The water inlet shell section is a vertical cylindrical shell as a whole, with a water inlet recess provided on its inner wall, and at least one water inlet pipe passing through the water inlet shell section from the outside and connected to the water inlet recess; at least one water outlet hole is also provided through the side wall of the water inlet shell section, and the water outlet hole is located above the water inlet recess; a first piston that can slide up and down is also provided in the water inlet shell section, and the lower end of the first piston extends downward through the first seal into the closed shell section.

[0008] The water outlet shell section is a vertical columnar shell as a whole, with at least one water inlet hole on the side wall and a flushing hole on the bottom; the water outlet shell section is also provided with a second piston that can slide up and down, and the upper end of the second piston extends upward through the second seal into the closed shell section.

[0009] A driving device is provided in the closed shell section, and the driving device can drive the first piston and the second piston to move up and down independently.

[0010] The automatic flushing device for a toilet provided by the present invention is installed in a water tank, a flushing hole at the bottom is connected to a flushing pipe of the toilet, and a water inlet pipe is connected to a water source.

[0011] The first piston is used to control the water inlet into the water tank. When the first piston is in the lower position, the first piston closes the water inlet recess and water cannot enter the water inlet shell section; when the first piston is in the upper position, water flows through the water inlet recess into the water inlet shell section, and then overflows from the water outlet into the water tank.

[0012] The second piston is used to control the flushing of the water tank. When the second piston is in the lower position, the water inlet hole and the flushing hole are separated by the second piston, and the water in the water tank cannot flow out of the flushing hole; when the second piston is in the upper position, the water in the water tank flows into the water outlet shell section through the water inlet hole and then flushes downward from the flushing hole to realize the flushing operation.

[0013] It can be seen that in the automatic flushing toilet device provided by the present invention, only the upper part of the first piston and the lower part of the second piston are in contact with water among the moving parts involved. The remaining parts in contact with water are all fixed structural parts, and the main driving device involving the moving parts is completely enclosed in the closed shell section. Therefore, the automatic flushing toilet device provided by the present invention has high reliability. In addition, in the automatic flushing toilet device as a whole, only the outer surface of the shell is immersed in water. Since the outer surface of the shell does not involve water inlet and outlet control, it can be made into a simple and smooth surface without the need for a very complex structure. Therefore, it can reduce the deposition and adhesion of dirt and the breeding of aquatic microorganisms, making it cleaner, more hygienic, more stable and reliable.

[0014] Furthermore, the driving device includes a first threaded rod, a second threaded rod, a first bevel gear, a second bevel gear, a first clutch device, a second clutch device, an active bevel gear, and a rotating power source; the fixed axis of the active bevel gear is rotatably arranged in the closed shell segment, and the first bevel gear and the second bevel gear with a fixed axis that are rotatable are respectively engaged on the upper and lower sides of the active bevel gear; the first threaded rod is threadedly connected to the first piston, and the first clutch device is connected in series between the first threaded rod and the first bevel gear; the second threaded rod is threadedly connected to the second piston, and the second clutch device is connected in series between the second threaded rod and the second bevel gear; the rotating power source drives the active bevel gear to rotate.

[0015] The drive device originates from the rotary power source, creating two power output paths. When the first clutch device is in a power-connected state, the rotary power source can drive the first piston to move. When the first clutch device is in a power-disconnected state, the rotary power source does not cause the first piston to move. Similarly, the second clutch device is used to control the power connection between the second piston and the rotary power source. Therefore, by controlling whether the rotary power source rotates and the direction of rotation, and by controlling whether the first and second clutch devices are power-connected, the first and second pistons can be independently controlled, thereby achieving accurate control of water inflow and outflow.

[0016] Furthermore, the lower end of the first piston has a first trigger portion, a first micro-switch is provided at the upper limit position of the first trigger portion, and a second micro-switch is provided at the lower limit position of the first trigger portion. As the first piston moves in different positions, the first and second micro-switch will produce correspondingly different trigger states. Therefore, based on the trigger states, it is possible to determine whether the first piston has reached its full position, i.e., whether it is in the upper or lower position.

[0017] Furthermore, the upper end of the second piston has a second trigger portion, a third micro-switch is provided at the upper limit position of the second trigger portion, and a fourth micro-switch is provided at the lower limit position of the second trigger portion. Similarly, whether the second piston has reached its full position can be determined based on the trigger states of the third and fourth micro-switches.

[0018] Furthermore, the first clutch device and the second clutch device are both electromagnetic clutches, and the preferred clutching mode is: power separation when power is on, and power connection when power is off.

[0019] Furthermore, the rotational power source includes a motor, a worm, a worm gear, and a drive shaft; the motor is fixed, the worm is mounted on the motor's output shaft, the drive shaft is connected to the active bevel gear, the worm gear is mounted on the drive shaft, and the worm gear and the worm are meshed. The worm and worm gear combination has a one-way self-locking function, thereby preventing the first and second pistons from moving when the motor is not rotating.

[0020] Furthermore, a sub-shell is connected to the closed shell segment, and the surface separating the sub-shell and the closed shell segment is recorded as the separation surface; the motor, worm, and worm gear are all located in the sub-shell, and the drive shaft passes through the separation surface; at least one wire hole is also provided on the separation surface, and the wire hole is used for the lines of the clutch and micro switch to enter the sub-shell.

[0021] Furthermore, a wire conduit extends upward from the top of the secondary housing, extending above the water surface. The wiring for the clutch, microswitch, and motor is routed upward through the conduit, preventing contact between the circuits and water. To further enhance reliability, the conduit opening can be filled with sealant.

[0022] Furthermore, the water inlet recess is a groove surrounding the inner wall of the water inlet shell section.

[0023] Beneficial Effects: Compared with existing technologies, the automatic toilet flushing device provided by this invention is easy to install. It is integrally mounted at the bottom of the water tank, eliminating the need for internal assembly of moving components. The flushing device features piston position detection and self-locking functions, enabling automated control of toilet water inflow and flushing. The device utilizes a closed design, shielding the core moving structure from water, preventing corrosion and aging, and providing high reliability. The device's exterior surface is clean and smooth, lacking complex surfaces or structures, making it less susceptible to dirt accumulation. It is clean, hygienic, and structurally reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the internal structure of the present invention.

[0025] Figure 2 Schematic diagram of the coordination of the motion structure.

[0026] Figure 3 for Figure 1 Cross-section of the AA surface.

[0027] Figure 4 for Figure 1 Cross-section of the middle BB surface.

[0028] Figure 5 for Figure 1 Cross-section of the middle CC surface.

[0029] Figure 6 Schematic diagram of the water tank water storage status.

[0030] Figure 7 Schematic diagram of the flushing state.

[0031] In the figure, the water inlet shell section 1, the closed shell section 2, the water outlet shell section 3, the first seal 4, the second seal 5, the water inlet recess 11, the water inlet pipe 12, the water outlet hole 13, the first piston 14, the water inlet hole 31, the flushing hole 32, the second piston 33, the first threaded rod 61, the second threaded rod 62, the first bevel gear 63, the second bevel gear 64, the first clutch device 65, the second clutch device 66, the active bevel gear 67, the rotation power source 68, the first trigger part 141, the first micro switch 71, the second micro switch 72, the second trigger part 331, the third micro switch 73, the fourth micro switch 74, the motor 681, the worm 682, the worm gear 683, the drive shaft 684, the auxiliary housing 21, the threading hole 22, and the wire pipe 23. DETAILED DESCRIPTION

[0032] The present invention is further illustrated by the following examples, which are intended to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the present invention.

[0033] Unless otherwise defined, technical or scientific terms used in this disclosure should be understood to have the ordinary meanings understood by persons of ordinary skill in the art. The terms "first," "second," and similar expressions used in this disclosure do not denote any order, quantity, or importance, but are simply used to distinguish different components. Terms such as "include" or "comprising" mean that the elements or objects preceding the term include the elements or objects listed after the term, and their equivalents, without excluding other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. Example

[0034] An automatic flushing device for a toilet, such as Figures 1 to 7 As shown, it has a shell that can be installed at the bottom of the water tank; the shell includes a water inlet shell section 1, a closed shell section 2, and a water outlet shell section 3 from top to bottom; a first sealing member 4 is provided between the water inlet shell section 1 and the closed shell section 2, and a second sealing member 5 is provided between the closed shell section 2 and the water outlet shell section 3.

[0035] The water inlet section 1 is a vertical cylindrical shell with a water inlet recess 11 formed on its inner wall. This recess 11 is a groove that circumscribes the inner wall of the water inlet section 1. A water inlet pipe 12 penetrates the water inlet section 1 from the outside and connects to the water inlet recess 11. A set of water outlet holes 13 are also provided through the side wall of the water inlet section 1, located above the water inlet recess 11. A first piston 14 is also installed within the water inlet section 1, which can slide up and down. The lower end of the first piston 14 extends downward through the first seal 4 and into the closed section 2.

[0036] The water outlet shell section 3 is a vertical cylindrical shell as a whole, with a group of water inlet holes 31 provided on the side wall and a flushing hole 32 provided on the bottom; the water outlet shell section 3 is also provided with a second piston 33 that can slide up and down, and the upper end of the second piston 33 extends upward through the second seal 5 into the closed shell section 2.

[0037] A driving device is provided in the closed shell section 2, which can drive the first piston 14 and the second piston 33 to move up and down independently.

[0038] The drive device specifically includes a first threaded rod 61, a second threaded rod 62, a first bevel gear 63, a second bevel gear 64, a first clutch device 65, a second clutch device 66, a driving bevel gear 67, and a rotary power source 68. The driving bevel gear 67 is rotatably disposed on a fixed axis within the closed shell section 2. The first and second bevel gears 63 and 64, which are rotatably disposed on a fixed axis, are respectively engaged with the upper and lower sides of the driving bevel gear 67. The first threaded rod 61 is threadedly connected to the first piston 14, and the first clutch device 65 is connected in series between the first threaded rod 61 and the first bevel gear 63. The second threaded rod 62 is threadedly connected to the second piston 33, and the second clutch device 66 is connected in series between the second threaded rod 62 and the second bevel gear 64. The rotary power source 68 drives the driving bevel gear 67 to rotate. The first clutch device 65 and the second clutch device 66 are both electromagnetic clutches.

[0039] The lower end of the first piston 14 has a first trigger portion 141 , specifically a lower end surface. A first micro switch 71 is provided at the upper limit position of the first trigger portion 141 , and a second micro switch 72 is provided at the lower limit position of the first trigger portion 141 .

[0040] The upper end of the second piston 33 has a second trigger portion 331 , specifically an upper end surface. A third micro switch 73 is provided at the upper limit position of the second trigger portion 331 , and a fourth micro switch 74 is provided at the lower limit position of the second trigger portion 331 .

[0041] The rotating power source 68 specifically includes a motor 681, a worm 682, a worm wheel 683, and a drive shaft 684; the motor 681 is fixed, the worm 682 is arranged on the output shaft of the motor 681, the drive shaft 684 is connected to the active bevel gear 67, the worm wheel 683 is arranged on the drive shaft 684, and the worm wheel 683 is engaged with the worm 682.

[0042] The closed shell section 2 is also connected to a sub-shell 21, and the surface separating the sub-shell 21 from the closed shell section 2 is recorded as the separation surface; the motor 681, the worm 682, and the worm wheel 683 are all located in the sub-shell 21, and the drive shaft 684 passes through the separation surface; two threading holes 22 are also provided on the separation surface.

[0043] A wire pipe 23 is provided on the top of the secondary housing 21 and extends upward and above the water surface.

[0044] The above embodiments are exemplary and intended to illustrate the technical concepts and features of the present invention so that those skilled in the art can understand the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. An automatic flushing device for a toilet, characterized by: The invention has a shell that can be installed at the bottom of a water tank; the shell comprises, from top to bottom, a water inlet shell section (1), a closed shell section (2), and a water outlet shell section (3); a first sealing member (4) is provided between the water inlet shell section (1) and the closed shell section (2), and a second sealing member (5) is provided between the closed shell section (2) and the water outlet shell section (3); The water inlet shell section (1) is a vertical columnar shell as a whole, and a water inlet recess (11) is provided on its inner wall. At least one water inlet pipe (12) penetrates the water inlet shell section (1) from the outside and is connected to the water inlet recess (11); at least one water outlet hole (13) is also provided on the side wall of the water inlet shell section (1), and the water outlet hole (13) is located above the water inlet recess (11); a first piston (14) that can slide up and down is also provided in the water inlet shell section (1), and the lower end of the first piston (14) passes through the first sealing member (4) downward and extends into the closed shell section (2); The water outlet shell section (3) is a vertical columnar shell as a whole, with at least one water inlet hole (31) provided on the side wall and a flushing hole (32) provided on the bottom; the water outlet shell section (3) is also provided with a second piston (33) that can slide up and down, and the upper end of the second piston (33) passes through the second sealing member (5) and extends into the closed shell section (2); A driving device is provided in the closed shell section (2), and the driving device can drive the first piston (14) and the second piston (33) to move up and down independently; The driving device comprises a first threaded rod (61), a second threaded rod (62), a first bevel gear (63), a second bevel gear (64), a first clutch device (65), a second clutch device (66), an active bevel gear (67), and a rotational power source (68); the active bevel gear (67) is rotatably arranged on a fixed axis in the closed shell section (2), and a first bevel gear (63) and a second bevel gear (64) with a fixed axis are respectively engaged with each other on the upper side and the lower side of the active bevel gear (67); the first threaded rod (61) is threadedly connected to the first piston (14), and a first clutch device (65) is connected in series between the first threaded rod (61) and the first bevel gear (63); the second threaded rod (62) is threadedly connected to the second piston (33), and a second clutch device (66) is connected in series between the second threaded rod (62) and the second bevel gear (64); the rotational power source (68) drives the active bevel gear (67) to rotate; The flushing device has piston position detection and piston self-locking functions.

2. The automatic flushing device for toilet according to claim 1, characterized in that: The lower end of the first piston (14) has a first trigger portion (141), a first micro-switch (71) is provided at the upper limit position of the first trigger portion (141), and a second micro-switch (72) is provided at the lower limit position of the first trigger portion (141).

3. The automatic flushing device for toilet according to claim 1, characterized in that: The upper end of the second piston (33) has a second trigger portion (331), a third micro-switch (73) is provided at the upper limit position of the second trigger portion (331), and a fourth micro-switch (74) is provided at the lower limit position of the second trigger portion (331).

4. The automatic flushing device for toilet according to claim 1, characterized in that: The first clutch device (65) and the second clutch device (66) are both electromagnetic clutches.

5. The automatic flushing device for toilet according to claim 1, characterized in that: The rotary power source (68) includes a motor (681), a worm (682), a worm wheel (683), and a drive shaft (684); the motor (681) is fixedly arranged, the worm (682) is arranged on the output shaft of the motor (681), the drive shaft (684) is connected to the active bevel gear (67), the worm wheel (683) is arranged on the drive shaft (684), and the worm wheel (683) is meshed with the worm (682).

6. The automatic flushing device for toilet according to claim 5, characterized in that: The closed shell section (2) is further connected to a secondary shell (21), and the surface separating the secondary shell (21) from the closed shell section (2) is referred to as a separation surface; the motor (681), the worm (682), and the worm wheel (683) are all located within the secondary shell (21), and the drive shaft (684) passes through the separation surface; and at least one threading hole (22) is also provided through the separation surface.

7. The automatic flushing device for toilet according to claim 6, characterized in that: A line pipe (23) extending upward and exceeding the water surface is further provided on the top of the secondary shell (21).

8. The automatic flushing device for toilet according to claim 1, characterized in that: The water inlet recess (11) is a groove surrounding the inner wall of the water inlet shell section (1).

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