Liquid adding device applied to foam shield to prevent backflow

Abstract

This invention provides a liquid-adding device for preventing backflow in foam shields, comprising a housing and a liquid-adding box body. The liquid-adding box body is equipped with a liquid-adding port, a first pipe, and a transition chamber. The housing is provided with a second pipe, an outlet pipe, and an outlet. A motor drives the liquid-adding box body to move relative to the housing, allowing the liquid-adding port to be exposed or concealed, and the outlet to be opened or closed. A double sealing ring is provided between the first and second pipes to ensure airtightness and prevent soap liquid backflow. During liquid addition, the soap liquid flows through a funnel into the transition chamber and is guided by an inclined surface to the first pipe before flowing out. In the non-liquid-adding state, the double sealing ring isolates the channel, preventing backflow. This invention has a compact structure, is easy to operate, significantly improves user experience, and meets market demands.

Description

Technical Field

[0001] This utility model relates to a liquid adding device used in foam shields to prevent backflow. Background Technology

[0002] With the popularization of smart home devices, smart toilets, as an important part of modern bathrooms, are becoming increasingly feature-rich and sophisticated, gradually becoming key products for improving quality of life. Among them, the foam shield function, due to its ability to effectively isolate dirt, reduce odor diffusion, and enhance cleaning effect, is gradually penetrating from high-end models to ordinary, lightly smart models, leading to continuously expanding market demand. However, with the widespread application of the foam shield function, cost control and user experience optimization have become key concerns for the industry. In actual use, users face inconvenience when adding soap, especially during maintenance or repair, where residual foam liquid can easily flow back from the filling port, increasing operational complexity and potentially causing liquid leakage and environmental pollution, thus significantly reducing the overall user experience. While some existing technologies attempt to seal the filling port through simple mechanical structures, these solutions often suffer from insufficient sealing performance, cumbersome operation, and ineffective backflow prevention, failing to meet users' needs for efficient and convenient operation. Summary of the Invention

[0003] This utility model discloses a liquid filling device for preventing backflow in foam shields, aiming to solve the problem of how users can quickly and conveniently add foam liquid in the function of foam shields; in addition, it also solves the problem of residual foam liquid flowing out from the filling port after draining during after-sales maintenance, which causes operational inconvenience and brings users a different experience.

[0004] The present invention adopts the following solution:

[0005] A liquid-filling device for preventing backflow in foam shields, characterized in that it comprises a body including a shell and a liquid-filling box, wherein the body is provided with a liquid-filling port, and the body is configured to move relative to the shell to expose or conceal the liquid-filling port; the body is provided with a first pipe that can communicate with the liquid-filling port; the shell is provided with a second pipe and a liquid-discharge pipe, wherein a liquid-discharge port is provided between the second pipe and the liquid-discharge pipe, and the first pipe can be inserted into the second pipe; when the liquid-filling port is exposed for liquid filling, the liquid-discharge port is open, allowing soap solution to flow in from the first pipe and then flow out from the liquid-discharge pipe; when the liquid-filling port is concealed, the liquid-discharge port is closed, and the liquid-discharge pipe is not connected to the first pipe.

[0006] In this embodiment of the present invention, a first sealing ring and a second sealing ring are disposed between the outer periphery of the first pipe and the inner periphery of the second pipe. When the first sealing ring and the second sealing ring are located on the same side of the liquid outlet, the liquid outlet is open; when the first sealing ring and the second sealing ring are located on both sides of the liquid outlet, the liquid outlet is closed.

[0007] In this embodiment of the present invention, the outlet is located in the middle of the axial direction of the second pipe, the first pipe can be inserted into the opening at one end of the second pipe and move along the axial direction, and the first sealing ring can prevent soap liquid from leaking out from the gap between the two pipes.

[0008] In this embodiment of the invention, a baffle is provided at the other end of the second pipe so that the soap solution can only flow from the outlet to the outlet pipe after it flows in from the first pipe.

[0009] In this embodiment of the present invention, the first sealing ring is always located on the side of the liquid outlet near the opening of the second pipe; when the liquid outlet is open, the second sealing ring is also located on the side of the liquid outlet near the opening of the second pipe; when the liquid outlet is closed, the second sealing ring is located on the side of the liquid outlet near the baffle.

[0010] In this embodiment of the present invention, the main body is further provided with a transition cavity that can be connected to the first pipe. The bottom of the transition cavity is provided with an inclined surface, which can guide the soap solution in the transition cavity to the first pipe. A liquid inlet can be provided above the transition cavity.

[0011] In this embodiment of the invention, a silicone block is provided at the opening above the transition cavity, and a liquid inlet is provided in the middle of the silicone block.

[0012] In this embodiment of the invention, a funnel is also included, the lower end of which is inserted into the liquid inlet and extends into the transition cavity.

[0013] In this embodiment of the invention, a motor is also included, which can drive the main body to move relative to the outer shell, thereby realizing the opening or closing of the liquid outlet.

[0014] In this embodiment of the utility model, the motor is mounted on the housing, a gear is mounted on the output shaft of the motor, and a rack is mounted on the main body. The gear can cooperate with the rack to drive the main body to move relative to the housing.

[0015] This utility model provides a liquid dispensing device for preventing backflow in foam shields, which has the following advantages: the automatic opening and closing of the dispensing port is achieved by motor drive, which significantly improves the user's ease of operation; the double sealing ring design effectively prevents soap liquid backflow, improving the safety and reliability of the device; the overall structure is compact and the components are highly integrated, reducing production costs; it has a wide range of applications, not only suitable for high-end models, but also applicable to ordinary light intelligent models, meeting market demand.

[0016] Specifically, the transition chamber design of this invention utilizes a sloping flow guide to ensure that the soap solution smoothly enters the first pipe, avoiding waste or contamination caused by residual liquid. The funnel design of this invention not only facilitates quick liquid addition but also reduces liquid spillage due to improper operation. The design of the funnel's lower end extending into the transition chamber allows the soap solution to flow directly into the bottom of the transition chamber, avoiding inconvenience caused by liquid stagnation. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the liquid addition state in an embodiment of this utility model.

[0019] Figure 2 This is a schematic diagram of the embodiment of the present invention in the state without liquid addition.

[0020] Figure 3 This is an exploded view of an embodiment of this utility model.

[0021] Figure 4 This is a cross-sectional view of the liquid addition state in an embodiment of the present invention. Figure 1 .

[0022] Figure 5 This is a cross-sectional view of the liquid addition state in an embodiment of the present invention. Figure 2 .

[0023] Figure 6 This is a cross-sectional view of an embodiment of the present invention with the liquid outlet in a closed state.

[0024] Figure 7 This is a schematic diagram of the gear and rack in this utility model.

[0025] Figure 8 This is a schematic diagram of the motor being configured on top of the outer casing in this utility model. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments.

[0027] Referring to the accompanying drawings, the device mainly includes a housing 1, a liquid addition box body 2, a first pipe 4, a second pipe 5, a liquid outlet pipe 6, a sealing ring structure, and a motor drive system, among other core components. These components work together to complete the functions of adding soap solution, guiding its flow, and preventing backflow.

[0028] First, the overall structure and working principle of this device are described. The outer casing 1 serves as the external support structure for the entire device, housing the main body 2 and other core components. A drawer-like structure can be formed between the main body and the outer casing, allowing the main body to be pulled out relative to the outer casing (either retractable or electrically). The main body 2 is equipped with a liquid inlet 3, which can be exposed or concealed by the movement of the main body 2 relative to the outer casing 1. When exposed, liquid can be added. This design ensures that the liquid inlet 3 can be concealed when not in use, preventing the entry of external contaminants and improving the overall aesthetics and safety of the device. The main body 2 is also equipped with a first pipe 4, used to guide soap solution from the liquid inlet 3 into the subsequent flow path. The outer casing 1 contains a second pipe 5 and an outlet pipe 6, with an outlet 7 between the second pipe 5 and the outlet pipe 6 to control the outflow of soap solution. The first pipe 4 and the second pipe 5 are connected by a plug-in joint, maintaining communication between them.

[0029] To ensure a tight seal between the first pipe 4 and the second pipe 5, two sealing rings, namely the first sealing ring 8 and the second sealing ring 9, are installed between the outer circumference of the first pipe and the inner circumference of the second pipe. The positions of these two sealing rings determine the open or closed state of the outlet 7. When the first sealing ring 8 and the second sealing ring 9 are on the same side of the outlet 7, the outlet 7 is open, and soap solution can flow in from the first pipe 4 and flow out sequentially through the outlet 7 and the outlet pipe 6. When the first sealing ring 8 and the second sealing ring 9 are on opposite sides of the outlet 7, the outlet 7 is closed, and the outlet pipe is no longer connected to the second pipe 5, thus effectively preventing soap solution backflow. This double sealing ring design not only enhances the sealing performance of the device but also provides additional protection when the device is tilted or overturned, ensuring that soap solution will not flow back to the filling port 3 due to the inversion of the equipment or gravity.

[0030] Preferably, a baffle 17 is provided at the other end of the second pipe, so that the soap solution flowing in from the first pipe can only flow from the outlet to the outlet pipe, ensuring a single flow direction. The first sealing ring is always located on the side of the outlet near the opening of the second pipe; when the outlet is open, the second sealing ring is also located on the side of the outlet near the opening of the second pipe; when the outlet is closed, the second sealing ring is located on the side of the outlet near the baffle. That is to say, the second sealing ring moves back and forth on both sides of the outlet, thereby realizing the opening or closing of the outlet.

[0031] Furthermore, the main body 2 is internally configured with a transition cavity 10, the bottom of which is designed with a sloping surface 11. This sloping surface 11 design allows the soap solution to flow smoothly from the filling port 3 and be quickly guided into the first pipe 4, avoiding the influence of residual liquid on the device. A silicone block 12 covers the opening at the top of the transition cavity 10, with an opening in the center of the silicone block 12 forming the filling port 3. The silicone block 12 is made of a material with good flexibility and sealing properties, effectively preventing leakage of soap solution when not in use. In addition, the device includes a funnel 13, the lower end of which is inserted into the filling port 3 and extends into the transition cavity 10. When the user pours soap solution into the funnel 13, the liquid flows directly into the bottom of the transition cavity 10 and is guided into the first pipe 4 through the sloping surface 11. This design not only improves the efficiency of dispensing but also reduces liquid spillage due to improper operation.

[0032] The motor 14 is a crucial component of this device, responsible for driving the body 2 to move relative to the outer casing 1, thereby exposing or concealing the filling port 3 and opening or closing the outlet port 7. The motor 14 is mounted on the outer casing 1, with a gear 15 mounted on its output shaft, and a rack 16 mounted on the body 2. The gear 15 and rack 16 mesh together, and the rotation of the motor 14 drives the body 2 to move in a linear direction. When the motor 14 rotates forward, the body 2 moves outward, exposing the filling port 3, while the first pipe 4 and the second pipe 5 are extended, opening the outlet port 7. When the motor 14 rotates in reverse, the body 2 moves inward, the first and second pipes retract, concealing the filling port 3 and closing the outlet port 7. This electric drive significantly improves user convenience and achieves automated control.

[0033] The specific operation process of this device is described in detail below. S1: When liquid needs to be added, the motor 14 is started. The motor 14 drives the main body 2 to move outward through the engagement of the gear 15 and rack 16, opening the outlet 7. S2: The user inserts the funnel 13 into the liquid inlet 3 and pours in the soap solution. The liquid is guided through the inclined surface 11 in the transition chamber 10 to the first pipe 4. S3: After flowing into the first pipe 4, the soap solution flows through the outlet 7 to the outlet pipe 6 and finally out, completing the liquid addition process. During this process, the first sealing ring 8 and the second sealing ring 9 are always located on the same side of the outlet 7, ensuring that the soap solution can flow out smoothly without leakage. After the liquid addition is completed, the motor 14 is started again to reverse its rotation, and the main body 2 moves inward, closing the outlet 7. At this time, the first sealing ring 8 and the second sealing ring 9 are located on both sides of the outlet 7, forming a barrier between the outlet and the second pipe, creating a sealed state and effectively preventing backflow of the soap solution.

[0034] In practical applications, this device can also handle various complex scenarios. For example, during maintenance or upkeep, if it is necessary to drain the residual liquid inside the device, simply moving the main body 2 to a concealed state ensures a complete seal between the liquid filling channel and the liquid outlet 7, preventing backflow even if the device is flipped over. Furthermore, since the position of the motor 14 can be flexibly adjusted according to actual needs, such as being positioned at the front, rear, or top, this device possesses a high degree of modularity, facilitating installation and maintenance.

[0035] In summary, this specific embodiment achieves automatic opening and closing of the dispensing port through motor drive, simplifying the user's operation steps; the double sealing ring design improves the device's sealing performance, solving the problem of soap backflow; the transition chamber and inclined surface structure optimize the flow path of the soap, reducing waste of residual liquid; and the funnel design improves dispensing efficiency and reduces the possibility of operational errors. The above technical solutions make this device compact, easy to operate, and highly reliable, suitable for the foam shield function in smart toilets, meeting market demands and significantly improving the user experience.

[0036] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A liquid dispensing device for preventing backflow in foam shields, characterized in that, The body includes a housing and a liquid filling box, the body being provided with a liquid filling port, and the body being configured to move relative to the housing to expose or conceal the liquid filling port; The main body is provided with a first pipe that can be connected to the liquid filling port; the outer shell is provided with a second pipe and a liquid outlet pipe, and a liquid outlet is provided between the second pipe and the liquid outlet pipe. The first pipe can be inserted and connected to the second pipe. When the filling port is exposed for adding liquid, the outlet is open, allowing the soap solution to flow in from the first pipe and then out from the outlet pipe; when the filling port is hidden, the outlet is closed, and the outlet pipe is not connected to the first pipe.

2. The liquid dispensing device for preventing backflow in a foam shield according to claim 1, characterized in that, A first sealing ring and a second sealing ring are disposed between the outer circumference of the first pipe and the inner circumference of the second pipe. When the first sealing ring and the second sealing ring are located on the same side of the liquid outlet, the liquid outlet is open; when the first sealing ring and the second sealing ring are located on both sides of the liquid outlet, the liquid outlet is closed.

3. The liquid dispensing device for preventing backflow in a foam shield according to claim 2, characterized in that, The outlet is located in the middle of the second pipe along its axial direction. The first pipe can be inserted into the opening at one end of the second pipe and moved along its axial direction. The first sealing ring can prevent soap solution from leaking out from the gap between the two pipes.

4. A liquid dispensing device for preventing backflow in a foam shield according to claim 3, characterized in that, The other end of the second pipe is equipped with a baffle so that the soap solution can only flow from the outlet to the outlet pipe after it flows in from the first pipe.

5. A liquid dispensing device for preventing backflow in a foam shield according to claim 4, characterized in that, The first sealing ring is always located on the side of the liquid outlet near the opening of the second pipe; when the liquid outlet is open, the second sealing ring is also located on the side of the liquid outlet near the opening of the second pipe, and when the liquid outlet is closed, the second sealing ring is located on the side of the liquid outlet near the baffle.

6. A liquid dispensing device for preventing backflow in a foam shield according to any one of claims 1-5, characterized in that, The main body is also equipped with a transition cavity that can be connected to the first pipe. The bottom of the transition cavity is provided with an inclined surface, which can guide the soap solution in the transition cavity to the first pipe. A liquid inlet can be provided above the transition cavity.

7. A liquid dispensing device for preventing backflow in a foam shield according to claim 6, characterized in that, A silicone block is provided at the opening above the transition cavity, and a liquid inlet is provided in the middle of the silicone block.

8. A liquid dispensing device for preventing backflow in a foam shield according to claim 7, characterized in that, It also includes a funnel, the lower end of which is inserted into the liquid inlet and extends into the transition chamber.

9. A liquid dispensing device for preventing backflow in a foam shield according to any one of claims 1-5, 7, and 8, characterized in that, It also includes a motor that can drive the main body to move relative to the outer shell, thereby opening or closing the liquid outlet.

10. A liquid dispensing device for preventing backflow in a foam shield according to claim 9, characterized in that, The motor is mounted on the housing, and a gear is mounted on the output shaft of the motor. A rack is mounted on the main body, and the gear can engage with the rack to drive the main body to move relative to the housing.

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