Mechanical toilet seat pressure control switch

Abstract

The invention discloses a mechanical toilet seat pressure control switch, and belongs to the technical field of toilet seats, the mechanical toilet seat pressure control switch comprises a starting rod, a reset mechanism, a transmission pull rope and a drainage control assembly, one end of the starting rod is fixedly installed on a toilet seat rotating shaft, the reset mechanism is fixedly installed on the lower side of the front end of a toilet seat, and when a person sits down, the reset mechanism is extruded to be compressed; when the person stands up, the reset mechanism resets, and at the moment, the starting rod resets; one end of the transmission pull rope is connected with the other end of the starting rod, the other end of the transmission pull rope is connected with the control end of the drainage control assembly, a starting air bag is arranged in the drainage control assembly and used for being connected with a closestool mechanical flushing valve, and when the starting rod is lifted, the drainage control assembly is started to reset and inflate the starting air bag; and the drainage control assembly is reset in a delayed manner until the starting air bag exhausts to start flushing. No electric power is needed, and flushing can be automatically controlled after a user sits down and stands up.

Description

Technical Field

[0001] This invention relates to the field of toilet seat technology, and more particularly to a mechanical toilet seat pressure control switch. Background Technology

[0002] Chinese patent document publication number CN219547939U discloses a toilet drainage device, belonging to the field of toilet technology, including a pressure limiting device. The pressure limiting device has a first water passage, a pressure chamber, and a pressure limiting member. The first water passage includes an inlet chamber and an outlet chamber. An isolation water hole is provided between the inlet chamber and the outlet chamber. The pressure limiting member is slidably disposed in the pressure chamber. When the water pressure increases, the pressure limiting member can move towards the isolation water hole. The pressure limiting member has a water flow channel that passes through both ends of the pressure limiting member. One end of the water flow channel is connected to the first water passage, and the other end is connected to the pressure chamber. The end of the pressure limiting member near the isolation water hole is an insertion end. The distance between the insertion end and the isolation water hole is less than the inner diameter of the inlet chamber.

[0003] In the field of purely mechanical flushing toilets, current technology does not yet rely on purely mechanical detection of when a person sits down and gets up to automatically control the flushing, making it inconvenient to use. Summary of the Invention

[0004] To address the aforementioned problems, this invention aims to solve the problems described above. One object of this invention is to provide a mechanical toilet seat pressure control switch that solves one of the above problems.

[0005] The present invention adopts the following solution: a mechanical toilet seat pressure control switch, including an actuating rod fixedly installed on one end of the toilet seat rotating shaft, a reset mechanism, a transmission pull rope, and a drainage control component. The reset mechanism is fixedly installed on the lower front end of the toilet seat. When a person sits down, the reset mechanism is compressed, and at this time the toilet seat rotating shaft drives the other end of the actuating rod to lift. When the person stands up, the reset mechanism resets, and at this time the actuating rod resets. One end of the drive rope is connected to the other end of the starter rod, and the other end of the drive rope is connected to the control end of the drainage control component. The drainage control component is equipped with a starter airbag, which is used to connect to the toilet's mechanical flush valve. When the starter rod is lifted, the drainage control component starts to inflate the starter airbag to reset. When the starter rod is reset, the drainage control component resets after a delay until the starter airbag is deflated and flushing is initiated.

[0006] A preferred technical solution is that the drainage control component is provided with a pull rope piston and a pull rope cavity, the pull rope piston is slidably connected to the pull rope cavity, one end of the transmission pull rope is fixedly connected to the pull rope piston, a pull rope spring is provided on the pull rope piston, and the pull rope spring provides a force to the pull rope piston away from the transmission pull rope; it also includes a pull rope connector fixedly installed on the toilet shell, a connecting post is slidably provided in the pull rope connector along the vertical direction, a transmission hole is provided in the middle of the connecting post, and the actuating rod passes through the transmission hole and is slidably connected to it.

[0007] A preferred technical solution is that the drainage control component is further provided with an inlet / outlet water switching piston and a switching chamber. The inlet / outlet water switching piston is slidably connected in the switching chamber. A limit rod is provided on the top of the inlet / outlet water switching piston. The limit rod extends into the pull rope chamber and abuts against the bottom of the pull rope piston. A switching spring is provided on the inlet / outlet water switching piston. The switching spring provides a force to the inlet / outlet water switching piston to move in the direction of the pull rope piston.

[0008] A preferred technical solution is that the inlet / outlet water switching piston has a hollow hole in the middle, the switching chamber is provided with an inlet pipe and an outlet pipe, both of which extend into the hollow hole, and a sealing plug is provided in the hollow hole. The ends of the inlet pipe and the outlet pipe are respectively located on both sides of the sealing plug. When the starting rod is raised, the sealing plug moves to abut against the outlet pipe, and when the starting rod is reset, the sealing plug blocks the inlet pipe.

[0009] A preferred technical solution is that the drainage control assembly is further provided with a delay control piston, a piston sleeve is provided outside the piston rod of the delay control piston, the piston rod and the piston sleeve are slidably connected, a water control channel is provided on the side wall of the piston sleeve, and the water control channel is in communication with the switching chamber.

[0010] A preferred technical solution is that the delay control piston is provided with a piston head, an activation sleeve is provided outside the piston head, an activation chamber is provided inside the activation sleeve, the piston head is slidably connected to the activation chamber, the piston rod sidewall has a gap connecting the activation chamber and the water control channel, the activation chamber is provided with an activation spring, the activation spring pushes the piston head to move towards the piston rod, when a person sits down, water enters the activation chamber, and the water pressure pushes the piston head to squeeze the activation spring.

[0011] A preferred technical solution is that the piston rod is provided with a delayed reset section and a rapid reset section. The gap between the rapid reset section and the piston sleeve is greater than the gap between the delayed reset section and the piston sleeve. The rapid reset section is closer to the piston head than the delayed reset section. During reset, the delayed reset section and the rapid reset section are sequentially connected to the starting chamber and the water control channel.

[0012] A preferred technical solution is that the drainage control component is provided with an outer shell, the piston sleeve is provided with an adjustment hole at the top, a delay adjustment rod is provided in the adjustment hole, the delay adjustment rod is rotatably mounted on the outer shell, an adjustment top rod is slidably provided in the adjustment hole, the delay adjustment rod is threadedly connected to the adjustment top rod, when the delay adjustment rod is rotated, the adjustment top rod slides along the adjustment hole, away from or close to the piston head, and when activated, the piston head abuts against the adjustment top rod.

[0013] A preferred technical solution is that the activation airbag includes an airbag cavity and a pneumatic piston, the pneumatic piston being slidably connected in the airbag cavity, an inflation spring being provided in the airbag cavity, the inflation spring abutting against the pneumatic piston, the piston rod extending to abut against the pneumatic piston, the inflation spring providing a force to the pneumatic piston to move closer to the piston rod, and an exhaust pipe being provided at the end of the airbag cavity away from the piston rod, the exhaust pipe being used to connect to the activation end of the toilet mechanical flush valve.

[0014] A preferred technical solution is that the reset mechanism includes a reset cylinder, a reset spring, and a support button. The reset cylinder is fixed to the underside of the toilet seat, the support button is slidably connected in the reset cylinder, and the reset spring is fixed in the reset cylinder and abuts against the support button, giving the support button a downward pushing force.

[0015] Compared with the prior art, the mechanical toilet seat pressure control switch of the present invention has the following technical advantages: This application discloses a mechanical toilet seat pressure control switch, comprising an actuating rod fixedly mounted at one end to the toilet seat pivot, a reset mechanism, a transmission pull cord, and a drainage control assembly. The reset mechanism is fixedly mounted on the lower front side of the toilet seat. When a person sits down, the reset mechanism is compressed, causing the toilet seat pivot to lift the other end of the actuating rod. When the person stands up, the reset mechanism resets, and the actuating rod resets as well. One end of the transmission pull cord is connected to the other end of the actuating rod, and the other end of the transmission pull cord is connected to the control end of the drainage control assembly. The drainage control assembly contains an actuating airbag, which is connected to the toilet's mechanical flush valve. When the actuating rod lifts, the drainage control assembly inflates the actuating airbag to reset. When the actuating rod resets, the drainage control assembly resets after a delay until the actuating airbag deflates and initiates flushing. This design requires no electricity and automatically controls flushing after sitting and standing, making it convenient to use.

[0016] Other features and advantages of the invention will become clear when reading the following description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the mechanical toilet seat pressure control switch provided in a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the drainage control component structure provided in a specific embodiment of the present invention; Figure 3 This is provided in a specific embodiment of the present invention. Figure 2 Enlarged structural diagram of section A; Figure 4 This is a schematic diagram of the reset mechanism structure provided in a specific embodiment of the present invention.

[0019] In the picture: 1. Starter lever; 2. Connecting column; 3. Drive rope; 4. Reset mechanism; 5. Drainage control assembly; 21. Drive hole; 31. Rope connector; 41. Reset cylinder; 42. Support button; 43. Reset spring; 51. Inlet pipe; 52. Outlet pipe; 53. Exhaust pipe; 541. Rope chamber; 542. Rope spring; 543. Rope piston; 55. Inlet / outlet switching piston; 551. Limiting rod; 552. Switching spring; 553. Switching chamber; 554. Hollow hole; 555. Sealing plug; 56. Delay control piston; 561. Piston head; 562. Piston rod; 563. Delay reset section; 564. Quick reset section; 565. Starting spring; 571. Piston sleeve; 572. Water control channel; 581. Delay adjustment rod; 582. Adjustment hole; 583. Adjustment top rod; 59. Starting airbag; 591. Airbag cavity; 592. Inflation spring; 593. Pneumatic piston; 501. Outer shell. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0021] The mechanical toilet seat pressure control switch will be described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1-4 As shown, a mechanical toilet seat pressure control switch includes an actuating rod 1 fixedly mounted on the toilet seat's rotating shaft at one end, a reset mechanism 4, a transmission pull cord 3, and a drainage control assembly 5. The reset mechanism 4 is fixedly mounted on the lower front side of the toilet seat. When a person sits down, the reset mechanism 4 is compressed, causing the toilet seat's rotating shaft to lift the other end of the actuating rod 1. When the person stands up, the reset mechanism 4 resets, and the actuating rod 1 resets as well. When the user sits down, their weight presses down on the reset mechanism 4 located on the lower front side of the toilet seat, compressing it. Simultaneously, as the toilet seat rotates along the rear rotating shaft, it lifts the other end of the actuating rod 1, which is fixedly connected to it. The lifting action of the actuating rod 1 pulls the transmission pull cord 3 connected to it.

[0023] One end of the transmission pull rope 3 is connected to the other end of the starting rod 1, and the other end of the transmission pull rope 3 is connected to the control end of the drainage control component 5. The drainage control component 5 is provided with a starting airbag 59, which is used to connect to the toilet mechanical flush valve. When the starting rod 1 is raised, the drainage control component 5 starts to inflate the starting airbag 59 to reset. When the starting rod 1 is reset, the drainage control component 5 resets after a delay until the starting airbag 59 expels and starts flushing. The toilet mechanical flush valve is like the drainage device of a toilet with patent publication number CN219547939U. In this embodiment, the exhaust pipe 53 of the starting airbag 59 can be connected in parallel with the pneumatic button in the above-mentioned flush valve, so that it can automatically flush by detecting when the user sits down and stands up. When the user finishes using the toilet and stands up, the pressure applied to the reset mechanism 4 disappears, and the reset mechanism 4 resets by its own elasticity, pushing the front end of the toilet seat upward to return it to its original position. Correspondingly, the rotating shaft rotates to drive the starting rod 1 to reset, thereby releasing the transmission pull rope 3. Throughout the process, the drainage control component 5 plays a central control role. When a person sits down, the activation lever 1 rises, triggering the airbag 59 to inflate and reset, preparing for the subsequent flushing action. When the activation lever 1 resets, the drainage control component 5 does not immediately trigger flushing; instead, it enters a delayed reset state. Only after a preset delay does it control the airbag 59 to deflate, thereby triggering the connected mechanical flushing valve to flush. Through a purely mechanical linkage, pull rope, and fluid control mechanism, the function of automatically flushing after a delay following a person's standing up is achieved. This not only solves the problem of forgetting to flush but also requires no external power source, is simple and reliable in structure, low in cost, and easy to install and maintain. Its delay function prevents water from splashing onto the user immediately upon standing, greatly improving the user experience and hygiene.

[0024] To ensure that the drive rope 3 can accurately and stably drive the internal mechanism of the drainage control component 5, the drainage control component 5 is provided with a pull rope piston 543 and a pull rope cavity 541. The pull rope piston 543 is slidably connected in the pull rope cavity 541. One end of the drive rope 3 is fixedly connected to the pull rope piston 543. A pull rope spring 542 is provided on the pull rope piston 543, and the pull rope spring 542 provides a force to the pull rope piston 543 away from the drive rope 3. It also includes a pull rope connector 31 fixedly installed on the toilet shell. A connecting post 2 is slidably arranged vertically inside the pull rope connector 31. A transmission hole 21 is provided in the middle of the connecting post 2. The actuating rod 1 passes through the transmission hole 21 and is slidably connected to it. When a person sits down, the actuating rod 1 is raised, and the actuating rod 1 slides in the transmission hole 21 of the connecting post 2 and pushes the connecting post 2 upward. The connecting column 2 moves upward, and through the transmission rope 3 connected to it, overcomes the elasticity of the rope spring 542, pulling the rope piston 543 upward. When the person stands up and the starting rod 1 resets, the pushing force on the connecting column 2 disappears. At this time, the compressed rope spring 542 releases energy, pushing the rope piston 543 downward to reset, and pulling the connecting column 2 and the starting rod 1 quickly to reset through the transmission rope 3. This structure is ingeniously designed. On the one hand, the sliding connection between the connecting column 2 and the starting rod 1 compensates for the deviation between the arc-shaped movement trajectory of the starting rod 1 and the linear movement of the rope, ensuring smooth transmission. On the other hand, the rope spring 542 not only provides the reset force for the rope piston 543 and the starting rod 1, but more importantly, it keeps the transmission rope 3 in a taut state, eliminating transmission gaps and ensuring the response speed and accuracy of the action. In practical applications, regardless of how the toilet seat is raised, this structure ensures that the pull-rope piston 543 performs precise linear reciprocating motion within the pull-rope cavity 541, laying a solid foundation for subsequent precise control of water path switching.

[0025] To achieve different functional stages—preparing for flushing when a person sits down and delaying flushing when a person stands up—the water flow direction needs to be controlled simultaneously with the action of the pull-rope piston 543. Water pressure is used to store energy, allowing a small force to trigger a large stroke. The drainage control assembly 5 also includes an inlet / outlet switching piston 55 and a switching chamber 553. The inlet / outlet switching piston 55 is slidably connected to the switching chamber 553. A limiting rod 551 is located at its top, extending upwards into the pull-rope chamber 541 and abutting against the bottom of the pull-rope piston 543. A switching spring 552 is installed on the inlet / outlet switching piston 55, which constantly applies a force to the inlet / outlet switching piston 55 towards the pull-rope piston 543, ensuring that the limiting rod 551 firmly abuts against the pull-rope piston 543.

[0026] Furthermore, the inlet / outlet water switching piston 55 has a hollow hole 554 in its center. The side wall of the switching chamber 553 is provided with an inlet pipe 51 and an outlet pipe 52, both of which extend into the hollow hole 554. The inlet pipe 51 is directly connected to municipal water supply, or it can be connected from the rear end of the flow-limiting mechanism of the toilet mechanical flush valve in CN219547939U. The outlet pipe 52 flows directly back to the water tank of the toilet mechanical flush valve. A fixed sealing plug 555 is provided inside the hollow hole 554. The ends of the inlet pipe 51 and the outlet pipe 52 are located on both sides of the sealing plug 555. Its initial and working states are as follows: When the starting rod 1 is raised, the pull-rope piston 543 is pulled upward, and the pressure on the limiting rod 551, which is abutting its bottom, disappears. The inlet / outlet water switching piston 55 moves upward under the push of the switching spring 552 until the limiting rod 551 abuts against the pull-rope piston 543 again. During this process, the sealing plug 555 moves with the inlet / outlet water switching piston 55 to abut against the outlet pipe 52 port, blocking it. At this time, the inlet pipe 51 port is unobstructed, and water can flow in. When the starting rod 1 is reset, the pull-rope piston 543 moves downward under the action of the pull-rope spring 542. The limiting rod 551 overcomes the elastic force of the switching spring 552, pushing the inlet / outlet water switching piston 55 downward. During this process, the sealing plug 555 moves downward until it blocks the inlet pipe 51 port, while the outlet pipe 52 port is opened. Through the above structure, we have realized a simple and reliable water circuit switching valve directly driven by the pull-rope piston 543. Its working principle can be understood as follows: When a person sits down, the system is in water inlet mode, with inlet pipe 51 open and outlet pipe 52 closed; when the person stands up, the system switches to drainage mode, with inlet pipe 51 closed and outlet pipe 52 open. Inlet pipe 51 can be directly connected to municipal water supply or connected from the rear end of the flow-limiting mechanism of the toilet flush valve to obtain a constant pressure water source. Outlet pipe 52 flows directly back to the toilet tank. The beneficial effect of this design is that it cleverly transforms the sitting / standing action into a water path switching, providing a power source and control logic for subsequent time-delay control and flush triggering using water pressure. The entire process requires no electronic sensors or solenoid valves, greatly improving the system's reliability and lifespan. For example, when the user sits down, water continuously enters the system, storing energy for the time-delay mechanism; after the user stands up, the water path switches, and the stored water begins to slowly drain through outlet pipe 52, thus producing the time-delay effect.

[0027] To achieve an adjustable and stable delay effect, ensuring that flushing only begins after the user has completely stood up and left, a preferred technical solution is that the drainage control assembly 5 further includes a delay control piston 56. This delay control piston 56 includes a piston rod 562 and a piston head 561. A piston sleeve 571 is slidably connected to the piston rod 562. A water control channel 572 is formed on the side wall of the piston sleeve 571, communicating with the aforementioned switching chamber 553. An activation sleeve is provided outside the piston head 561 of the delay control piston 56, forming an activation chamber inside. The piston head 561 is slidably connected to this activation chamber. A gap is provided on the side wall of the piston rod 562 to connect the activation chamber and the water control channel 572. An activation spring 565 is provided inside the activation chamber, which continuously pushes the piston head 561 towards the piston rod 562. When a person sits down and the system is in water inlet mode, water flows from the inlet pipe 51 through the switching chamber 553 and water control channel 572, and through the gap between the piston rod 562 and the piston sleeve 571 into the starting chamber. The water pressure entering the starting chamber pushes the piston head 561 forward, overcoming the elastic force of the starting spring 565. When the person stands up and the system switches to drainage mode, the inlet pipe 51 is closed and the outlet pipe 52 is opened. At this time, under the pressure of the starting spring 565, the water in the starting chamber begins to flow backward through the gap between the piston rod 562 and the piston sleeve 571, through the water control channel 572 and the switching chamber 553, and flows back to the water tank from the outlet pipe 52. Because the gap is very small, the water flow speed is limited, and the piston head 561 slowly returns to its original position. The piston rod 562 is then pushed by the piston head 561 towards the starting airbag 59. The core principle of this delay control structure is to utilize the physical effect of orifice throttling. The water flow speed is controlled by adjusting the gap between the piston rod 562 and the piston sleeve 571, which in turn determines the time required for the piston head 561 to fully reset, i.e., the delay time. The length of this delay time directly affects the user experience. If the delay is too short, the user may not have completely moved away before water splashes onto them. This embodiment cleverly achieves precise and stable delay through purely mechanical hydraulic damping, ensuring both hygiene and water conservation. For example, the gap can be designed so that the delay time is approximately 3-5 seconds, sufficient for the user to stand up and take a step away before flushing begins, perfectly avoiding the embarrassment of flushing immediately upon standing.

[0028] To optimize the reset process and ensure that the delay mechanism provides a sufficiently long delay while guaranteeing sufficient force and speed upon final triggering of the flush, preferably, the piston rod 562 is provided with two sections of different diameters: a delayed reset section 563 and a rapid reset section 564. The rapid reset section 564 is closer to the piston head 561 and has a smaller outer diameter, resulting in a larger gap between it and the inner wall of the piston sleeve 571; while the delayed reset section 563 has a larger outer diameter, resulting in a smaller gap between it and the piston sleeve 571. During the reset process, the movement of the piston head 561 can be divided into two stages. In the first stage, the piston head 561 resets from the front end to the rear. Water in the activation chamber can only flow out through the smaller gap in the delayed reset section 563, resulting in slow drainage and slow movement of the piston head 561; this is the delay stage. When the piston head 561 passes the delayed reset section 563 and enters the rapid reset section 564, the gap between this section and the piston sleeve 571 suddenly increases, the drainage channel widens instantly, and the drainage resistance decreases sharply. The piston head 561 then rapidly resets under the strong push of the starting spring 565, causing the piston rod 562 to quickly strike the starting airbag 59. This is the rapid triggering stage. The principle and beneficial effects of this multi-stage design are very significant. It requires both a long delay time and sufficient triggering force. If a small gap is used throughout the entire stroke, although the delay is long enough, the final movement speed of the piston rod 562 will be very slow, and the force will be weak, potentially resulting in insufficient and rapid compression of the starting airbag 59, causing weak flushing or failure. If a large gap is used throughout the entire stroke, the delay time is too short and meaningless. Through the segmented design, a small gap is used for most of the stroke to achieve precise delay, while a large gap is used at the final moment to achieve rapid and powerful triggering, ensuring that the system meets both the delay requirements and guarantees reliable flushing action. In real-world applications, this design ensures that even slight fluctuations in water pressure at the user's home will guarantee that the piston rod 562 will eventually strike and activate the airbag 59 with sufficient speed and force, achieving reliable flushing.

[0029] To meet the different user preferences for delay time or adapt to different water pressure environments, an adjustable delay mechanism is needed. Preferably, the drainage control assembly 5 has a housing 501. An adjustment hole 582 is provided at the top of the piston sleeve 571, and an adjustment rod 583 is slidably disposed within the adjustment hole 582. Simultaneously, a delay adjustment rod 581 is rotatably mounted on the housing 501, and this delay adjustment rod 581 is threadedly connected to the adjustment rod 583. When the user rotates the delay adjustment rod 581, the adjustment rod 583 slides up and down within the adjustment hole 582, thereby changing the initial distance between its bottom end and the piston head 561.

[0030] When a person sits down, the water pressure pushes the piston head 561 forward, eventually bringing it against the bottom of the adjusting rod 583, thus limiting its maximum forward stroke. Adjusting the position of the adjusting rod 583 by rotating the delay adjusting rod 581 effectively changes the maximum stroke of the piston head 561. A longer stroke requires more water to fill and drain from the starting chamber, resulting in a longer delay time with a constant drainage rate; conversely, a shorter stroke results in a shorter delay time. The greatest benefit of this design lies in its high degree of user customization. For example, elderly people or those with mobility issues who are slow to get up can extend the delay time; while for households with low water pressure, the stroke can be shortened to avoid excessive delays due to insufficient water pressure. This user-friendly adjustment design significantly improves the product's applicability and user satisfaction.

[0031] To convert the mechanical movement of the delay control piston 56 into a pneumatic signal that triggers the toilet flush valve, a highly efficient energy conversion structure is required. Preferably, the actuation airbag 59 includes an airbag cavity 591, a pneumatic piston 593, an inflation spring 592, and an exhaust pipe 53. The pneumatic piston 593 is slidably connected within the airbag cavity 591 and abuts against the end of the piston rod 562 of the aforementioned delay control assembly. An inflation spring 592 is disposed within the airbag cavity 591, abutting against the pneumatic piston 593 and consistently providing a force to the pneumatic piston 593 to move towards the piston rod 562. An exhaust pipe 53 is disposed at the end of the airbag cavity 591 furthest from the piston rod 562, and this exhaust pipe 53 is used to connect to the actuation end of the toilet mechanical flush valve. In the standby state, the inflation spring 592 pushes the pneumatic piston 593 to its rearmost position. When a person stands up, after a delay, piston rod 562 moves forward rapidly, pushing pneumatic piston 593 forward, overcoming the elastic force of air spring 592. The forward movement of pneumatic piston 593 compresses the air in air chamber 591, generating a positive pressure airflow. This airflow is output through exhaust pipe 53, triggering the connected toilet's mechanical flush valve to flush. After flushing, when the person sits down, as piston rod 562 retracts, pneumatic piston 593 returns to its original position under the action of air spring 592. At this time, negative pressure is formed in air chamber 591, drawing air from the outside or inside the flush valve through exhaust pipe 53, preparing for the next flush. It efficiently converts the mechanical thrust of piston rod 562 into pneumatic energy through a sealed air chamber 591. Utilizing gas as the power transmission medium, especially in parallel with the pneumatic button in patent CN219547939U, installation is extremely simple and requires no modification to the original toilet's internal structure. For example, simply connect the exhaust pipe 53 to the T-connector of the original flush button's air pipe to achieve both manual and automatic flushing.

[0032] To ensure the toilet seat can reliably and smoothly return to its original position and provide initial mechanical driving force for the entire system, the reset mechanism 4 preferably includes a reset cylinder 41, a reset spring 43, and a support button 42. The reset cylinder 41 is fixedly installed on the underside of the toilet seat. The support button 42 is slidably connected in the reset cylinder 41, with its bottom for contacting the ceramic body of the toilet. The reset spring 43 is fixed inside the reset cylinder 41 and always abuts against the support button 42, providing a downward pushing force to the support button 42. When a person sits down, the toilet seat presses down, the support button 42 is pressed into the reset cylinder 41, and the reset spring 43 is compressed. When the person stands up, the pressure disappears, the compressed reset spring 43 releases energy, pushing the support button 42 downward, thereby lifting the front end of the toilet seat and restoring it to its initial position. First, it directly applies the elastic force of the reset spring 43 to the front end of the seat, providing a stable and sufficient reset force to ensure that the seat can accurately reset each time, thus ensuring the accuracy of subsequent actions such as the start lever 1 and the pull cord. Secondly, the contact point between the support button 42 and the toilet ceramic body is always at the front end of the seat, resulting in a long lever arm and stable reset action, minimizing shaking or noise. Finally, this modular design is easy to install and maintain, and can be directly installed on most existing toilet seats. In actual use, this small reset mechanism 4 is the starting and ending point of the entire automatic flushing cycle, and its stability directly determines the reliability of the entire system.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or apparatus that includes that element.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. The present invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A mechanical toilet seat pressure control switch, characterized in that: The device includes a starter rod, a reset mechanism, a transmission pull rope, and a drainage control assembly, all of which are fixedly mounted on one end of the toilet seat pivot. The reset mechanism is fixedly mounted on the lower front side of the toilet seat. When a person sits down, the reset mechanism is compressed, which causes the other end of the starter rod to lift. When the person stands up, the reset mechanism resets, and the starter rod also resets. One end of the drive rope is connected to the other end of the starter rod, and the other end of the drive rope is connected to the control end of the drainage control component. The drainage control component is equipped with a starter airbag, which is used to connect to the toilet's mechanical flush valve. When the starter rod is lifted, the drainage control component starts to inflate the starter airbag to reset. When the starter rod is reset, the drainage control component resets after a delay until the starter airbag is deflated and flushing is initiated.

2. The mechanical toilet seat pressure control switch as described in claim 1, characterized in that: The drainage control assembly is provided with a pull rope piston and a pull rope cavity. The pull rope piston is slidably connected in the pull rope cavity. One end of the transmission pull rope is fixedly connected to the pull rope piston. A pull rope spring is provided on the pull rope piston. The pull rope spring provides the pull rope piston with a force that moves away from the transmission pull rope. It also includes a pull cord connector that is fixedly installed on the toilet shell. A connecting post is slidably arranged in the vertical direction inside the pull cord connector. A transmission hole is provided in the middle of the connecting post. The starting rod passes through the transmission hole and is slidably connected to it.

3. The mechanical toilet seat pressure control switch as described in claim 2, characterized in that: The drainage control assembly is further provided with an inlet / outlet water switching piston and a switching chamber. The inlet / outlet water switching piston is slidably connected in the switching chamber. A limit rod is provided on the top of the inlet / outlet water switching piston. The limit rod extends into the pull rope chamber and abuts against the bottom of the pull rope piston. A switching spring is provided on the inlet / outlet water switching piston. The switching spring provides a force to the inlet / outlet water switching piston to move in the direction of the pull rope piston.

4. The mechanical toilet seat pressure control switch as described in claim 3, characterized in that: The inlet / outlet switching piston has a hollow hole in the middle. The switching chamber is provided with an inlet pipe and an outlet pipe. Both the inlet pipe and the outlet pipe extend into the hollow hole. A sealing plug is provided in the hollow hole. The ends of the inlet pipe and the outlet pipe are located on both sides of the sealing plug. When the starting rod is raised, the sealing plug moves to abut against the outlet pipe. When the starting rod is reset, the sealing plug blocks the inlet pipe.

5. The mechanical toilet seat pressure control switch as described in claim 4, characterized in that: The drainage control assembly is further provided with a delay control piston. A piston sleeve is provided outside the piston rod of the delay control piston. The piston rod and the piston sleeve are slidably connected. A water control channel is provided on the side wall of the piston sleeve. The water control channel is in communication with the switching chamber.

6. The mechanical toilet seat pressure control switch as described in claim 5, characterized in that: The delay control piston is provided with a piston head, and an activation sleeve is provided outside the piston head. An activation chamber is provided inside the activation sleeve. The piston head is slidably connected to the activation chamber. The piston rod sidewall has a gap connecting the activation chamber and the water control channel. An activation spring is provided in the activation chamber. The activation spring pushes the piston head to move towards the piston rod. When a person sits down, water enters the activation chamber, and the water pressure pushes the piston head to squeeze the activation spring.

7. The mechanical toilet seat pressure control switch as described in claim 6, characterized in that: The piston rod is provided with a delayed reset section and a rapid reset section. The gap between the rapid reset section and the piston sleeve is greater than the gap between the delayed reset section and the piston sleeve. The rapid reset section is closer to the piston head than the delayed reset section. During reset, the delayed reset section and the rapid reset section are connected to the start-up chamber and the water control channel in sequence.

8. The mechanical toilet seat pressure control switch as described in claim 7, characterized in that: The drainage control assembly has an outer shell, and the piston sleeve has an adjustment hole at the top. A delay adjustment rod is installed in the adjustment hole and is rotatably mounted on the outer shell. An adjustment rod is slidably installed in the adjustment hole. The delay adjustment rod is threadedly connected to the adjustment rod. When the delay adjustment rod is rotated, the adjustment rod slides along the adjustment hole, moving away from or closer to the piston head. When activated, the piston head abuts against the adjustment rod.

9. The mechanical toilet seat pressure control switch as described in claim 5, characterized in that: The activation airbag includes an airbag cavity and a pneumatic piston. The pneumatic piston is slidably connected to the airbag cavity. An inflation spring is provided inside the airbag cavity, and the inflation spring abuts against the pneumatic piston. The piston rod extends to abut against the pneumatic piston. The inflation spring provides a force to the pneumatic piston to move closer to the piston rod. An exhaust pipe is provided at the end of the airbag cavity away from the piston rod. The exhaust pipe is used to connect to the activation end of the toilet mechanical flush valve.

10. The mechanical toilet seat pressure control switch as described in claim 1, characterized in that: The reset mechanism includes a reset cylinder, a reset spring, and a support button. The reset cylinder is fixed to the underside of the toilet seat, the support button is slidably connected to the reset cylinder, and the reset spring is fixed to the reset cylinder and abuts against the support button, giving the support button a downward pushing force.

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