Toilet turning cover overload protection circuit, toilet seat cover and intelligent toilet

Abstract

The utility model discloses a closestool flip cover overload protection circuit, a closestool seat cover and an intelligent closestool, and relates to the technical field of home furnishing, the closestool flip cover overload protection circuit comprises a load, a motor and an overload protection unit, the motor is connected with the closestool seat cover, and the overload protection unit comprises a first voltage stabilizing switch and a second voltage stabilizing switch; when the electromotive force generated in the motor is smaller than or equal to the reference electromotive force, the second voltage stabilizing switch is switched on, and the load is connected with the motor; when the electromotive force generated in the motor is larger than the reference electromotive force, the first voltage stabilizing switch is broken down, the second voltage stabilizing switch is disconnected, and the load is disconnected with the motor. The scheme that the safety clutch controls the upper limit of the torque in the transmission chain is replaced with the scheme of controlling the motor load, and the complexity of parts is simplified. Besides, the motor loop is controlled by electromotive force generated by the motor, the situation that the toilet seat cover is violently opened and closed can be dealt with under the condition that the intelligent toilet is powered off, a reliable flip cover overload protection function is provided, and the use performance of the product is improved.

Description

Technical Field

[0001] The utility model relates to the field of household technology, in particular to a toilet flap overload protection circuit, a toilet seat cover and an intelligent toilet. Background Art

[0002] Smart toilet is a kind of intelligent bathroom equipment with multiple functions, including automatic flushing, seat warming, automatic cover opening, etc. The toilet seat cover is usually connected to the motor. When the toilet seat cover is pressed or opened at a fast speed, the toilet seat cover will drive the motor to rotate at high speed. At this time, a large current is generated in the circuit. The entire transmission chain from the motor to the reduction box to the seat cover, each component will be subjected to a large torque and a corresponding large stress.

[0003] In the related art, a flap overload protection structure is designed for the toilet seat cover to prevent structural damage caused by excessive flapping of the toilet seat cover. Usually, a clutch is connected behind the motor. When the toilet seat cover flips over, "slipping" occurs between the clutch active and passive parts, thereby protecting the entire transmission chain from load impacts greater than the set value. However, after the friction plate in the clutch has worked for a certain period of time, due to wear and other reasons, the "slipping torque" of the clutch decreases, making the flip protection effect of the toilet seat cover worse. Summary of the invention

[0004] The embodiment of the utility model provides a toilet flip cover overload protection circuit, a toilet seat cover and an intelligent toilet, which are used to perform reliable flip overload protection on the toilet seat cover.

[0005] In a first aspect, an embodiment of the utility model provides a toilet lid overload protection circuit, comprising:

[0006] load;

[0007] The motor is connected to the toilet seat cover and is used to rotate forward or reverse when the toilet seat cover is pressed down or flipped up;

[0008] An overload protection unit comprises a first voltage stabilizing switch and a second voltage stabilizing switch; the first voltage stabilizing switch and the second voltage stabilizing switch are connected to two ends of the motor, and the second voltage stabilizing switch is connected to the load;

[0009] When the electromotive force generated in the motor is less than or equal to a preset reference electromotive force, the second voltage regulator switch is turned on and the load is connected to the motor; when the electromotive force generated in the motor is greater than the reference electromotive force, the first voltage regulator switch is broken down, the second voltage regulator switch is turned off, and the load is disconnected from the motor.

[0010] In some embodiments, the toilet lid overload protection circuit further includes a voltage-dividing resistor unit, wherein the voltage-dividing resistor unit includes a third resistor, and the third resistor is connected in series with the first voltage-stabilizing switch.

[0011] In some embodiments, the voltage-dividing resistor unit further includes a first resistor and a second resistor, and the first resistor and the second resistor are connected in series and connected to two ends of the motor.

[0012] In some embodiments, the first voltage regulator switch is a voltage regulator diode; the first pin of the voltage regulator diode is connected between the first resistor and the second resistor, the second pin of the voltage regulator diode is connected to the third resistor, the other end of the third resistor is connected to the first end of the motor, and the third pin of the voltage regulator diode is connected to the second end of the motor.

[0013] In some embodiments, the second voltage regulator switch is a field effect transistor, a source of the field effect transistor is connected to the third pin, a gate of the field effect transistor is connected to the second pin, a drain of the field effect transistor is connected to one end of the load, and the other end of the load is connected to the first end of the motor.

[0014] In some embodiments, the second voltage regulating switch is an NMOS tube.

[0015] In some embodiments, there are multiple first voltage regulating switches, and the multiple first voltage regulating switches are connected in series.

[0016] In a second aspect, an embodiment of the utility model provides a toilet seat cover, comprising:

[0017] A toilet lid overload protection circuit as described in any one of the first aspects;

[0018] The toilet seat cover is connected to the motor in the toilet flap overload protection circuit, and the toilet seat cover is connected to the motor in the toilet flap overload protection circuit.

[0019] In a third aspect, an embodiment of the utility model provides a smart toilet, comprising: a toilet seat cover and a toilet flap overload protection circuit as described in any one of the first aspects.

[0020] The embodiment of the utility model at least includes the following beneficial effects: the toilet cover overload protection circuit in the embodiment of the utility model includes a load, a motor and an overload protection unit, wherein the motor is connected to the toilet seat cover, and is used to rotate forward or reverse when the toilet seat cover is pressed down or flipped up, and the overload protection unit includes a first voltage stabilizer switch and a second voltage stabilizer switch; specifically, the first voltage stabilizer switch and the second voltage stabilizer switch are connected to both ends of the motor; when the electromotive force generated in the motor is less than or equal to the reference electromotive force, the second voltage stabilizer switch is turned on, and the load is connected to the motor; when the electromotive force generated in the motor is greater than the reference electromotive force, the first voltage stabilizer switch is broken down, the second voltage stabilizer switch is disconnected, and the load is disconnected from the motor. The embodiment of the present application replaces the scheme of using a mechanical device "safety clutch" in the related art to control the torque upper limit in the transmission chain with a scheme to control the motor load, thereby simplifying the complexity of the components. In addition, the motor circuit is controlled by using the electromotive force generated by the motor itself, so that even when the smart toilet is powered off, it can cope with the situation where the toilet seat cover is violently opened and closed, providing a reliable flip cover overload protection function and improving the product's performance.

[0021] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the connection between the motor and toilet seat cover of the smart toilet.

[0023] Figure 2 The utility model discloses a toilet cover overload protection circuit provided by the embodiment of the utility model.

[0024] Figure 3 It is a schematic diagram of the position of the toilet seat cover in the embodiment of the present application.

[0025] Figure 4 It is a circuit diagram of the toilet lid overload protection circuit in the embodiment of the present application. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0027] It should be understood that in the description of the embodiments of the present utility model, "a" means more than one, "a" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first", "second", etc., it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the embodiments of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the embodiments of the present invention based on the specific content of the technical solution.

[0029] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] A smart toilet is a smart bathroom device that integrates multiple functions, including automatic flushing, seat warming, and automatic lid opening. The automatic lid opening function is achieved by connecting the toilet seat cover to a motor and controlling the forward and reverse rotation of the motor to realize the electric lid opening and closing of the toilet. When the motor is powered on, the speed of opening or closing the toilet seat cover can be controlled by controlling the input voltage. When the smart toilet is powered off, the seat cover still has the function of "slowly descending". Figure 1 , Figure 1 This is a diagram of the connection between the motor and toilet seat cover of the smart toilet. Figure 1 , the motor and the load are connected, and the opening and closing of the toilet seat cover drives the motor to rotate and generate electricity, causing the load resistor to heat up. However, violent opening and closing of the seat cover will cause the motor to rotate too fast, generate a large current, and generate a large torque load on the motor and the seat cover itself, which may cause structural damage.

[0031] However, when the toilet seat cover is pressed or opened at a faster speed, the toilet seat cover will drive the motor to rotate at a high speed. At this time, a large current is generated in the circuit. As the starting point of the transmission chain, the motor will output a certain torque. When the motor outputs a large torque, the reduction box will increase the torque. The large torque output by the reduction box is transmitted to the shaft, gears, couplings and other parts in the transmission chain. At this time, the entire transmission chain from the motor to the reduction box to the seat cover, each component will be subjected to a large torque and a corresponding large stress. In severe cases, the structure of each component may be damaged.

[0032] In the related art, in order to cope with this extreme situation, a flap overload protection structure is designed for the toilet seat cover to prevent structural damage caused by excessive flapping of the toilet seat cover. Usually, a safety clutch is connected in series in the motor, that is, when the torque applied to the motor is below the set value, the clutch engages normally. When the torque applied to the motor is greater than the set value, the safety clutch is disconnected, thereby protecting the entire transmission chain from impacts greater than the set value. This prevents large torques from being transmitted to various components. For example, a commonly used safety clutch is a friction clutch. When the torque applied to the clutch is greater than the set value, "slipping" occurs between the clutch active and passive components, thereby protecting the entire transmission chain from load impacts greater than the set value.

[0033] However, when designing a friction clutch, in order to make the clutch size small enough and the torque during "slipping" large enough (at least greater than the maximum torque of the toilet seat cover on the rotation center, and with sufficient margin), dozens of friction plates will be used to achieve the effect of using small-sized friction plates to transmit sufficient torque. This design of multiple (dozens) friction plates results in a large number of parts in the entire overload protection device, and because the error of each friction plate may be accumulated dozens of times by dozens of friction plates, the friction clutch requires high dimensional accuracy for each friction plate when designing. And as the friction plates work for a certain period of time, due to wear and other reasons, the "slip torque" of the safety clutch will decrease, making the rollover protection effect of the toilet seat cover worse.

[0034] In addition, in order to save space, butterfly springs are used as elastic force generating components. The butterfly springs can exert axial force on the friction plate. However, the deformation of butterfly springs is not large, and the magnitude of the elastic force generated is more difficult to control. Therefore, every time a toilet flap motor is produced, it is necessary to use an adjusting nut to adjust the "slip torque" of the motor's safety clutch, which makes the production process more complicated.

[0035] Based on this, the embodiment of the present application provides a more reliable and convenient toilet lid overload protection circuit, which replaces the solution of using a mechanical device "safety clutch" to control the torque limit in the transmission chain in the related technology with a solution to control the motor load, thereby simplifying the complexity of the components and improving production efficiency. In addition, the motor circuit uses the electromotive force generated by the motor itself for control, and even when the smart toilet is powered off, it can also cope with the situation where the toilet seat cover is violently opened and closed, providing a reliable lid overload protection function and improving the product's performance.

[0036] Reference Figure 2 As shown, Figure 2 The toilet lid overload protection circuit provided by the utility model embodiment is as follows: Figure 2 As shown, the connection circuit includes: a toilet seat cover 100 , a motor 200 , an overload protection unit 300 and a load 400 .

[0037] Among them, refer to Figure 3 , Figure 3 Schematic diagram of the position of the toilet seat cover in the embodiment of the present application. The toilet seat cover 100 is located on the smart toilet, and the motor 200 is connected to the toilet seat cover 100. When the toilet seat cover 100 is pressed down or flipped up, the motor 200 rotates forward or reversely accordingly. For example, when the toilet seat cover 100 is flipped up, the motor 200 rotates forward, and when the toilet seat cover 100 is pressed down, the motor 200 rotates reversely. It can be understood that the embodiment of the present application does not limit the rotation direction of the motor 200.

[0038] The overload protection unit 300 includes a first voltage stabilizing switch 310 and a second voltage stabilizing switch 320 , wherein the first voltage stabilizing switch 310 and the second voltage stabilizing switch 320 are connected to two ends of the motor, and the second voltage stabilizing switch 320 is connected to the load 400 .

[0039] In one embodiment, a reference electromotive force is preset, where the reference electromotive force is used to determine whether the toilet seat cover 100 is overturned. If the toilet seat cover 100 is turned over normally, at this time, the electromotive force generated by the motor 200 driven by the turning is less than or equal to the reference electromotive force, and the second voltage stabilizing switch 320 is turned on, and the load 400 is connected to the motor 200. This process can be regarded as the toilet seat cover 100 falling, driving the motor 200 to rotate and generate electricity, and the motor 200 is connected to the load 400, and the gravitational potential energy generated during the turning of the toilet seat cover 100 is converted into heat energy of the load 400 after the motor 200 generates electricity, so that the falling process of the toilet seat cover achieves the effect of "slow descent".

[0040] If the toilet seat cover 100 is over-flipped, at this time, the electromotive force generated in the motor 200 is greater than the reference electromotive force, the first voltage regulator switch 310 is broken down, the second voltage regulator switch 320 is disconnected, the load 400 is disconnected from the motor 200, and the load 400 no longer serves as the load of the motor 200. As a result, the current in the motor circuit drops rapidly, and a large torque load can no longer be generated on the motor itself and components such as the toilet seat cover, thereby achieving overload protection for the toilet seat cover.

[0041] The following is a detailed description of the toilet lid overload protection circuit according to the embodiment of the present application. Figure 4 , Figure 4 It is a circuit diagram of the toilet lid overload protection circuit in the embodiment of the present application. Figure 4 The motor 200 is represented by the motor M, and the load 400 is the load resistor R4.

[0042] In one embodiment, the toilet lid overload protection circuit further includes a voltage-dividing resistor unit 500 , wherein the voltage-dividing resistor unit 500 includes a first resistor R1 and a second resistor R2 , wherein the first resistor R1 and the second resistor R2 are connected in series and connected to both ends of the motor M.

[0043] In one embodiment, the voltage dividing resistor unit 500 further includes a third resistor R3, and the third resistor R3 is connected in series with the first voltage stabilizing switch 310. At the same time, since the first voltage stabilizing switch 310 needs to be broken down during overload protection, the first voltage stabilizing switch 310 is Figure 3 The Zener diode ZD in the embodiment, for example, the Zener diode ZD can be a 2DW7 model Zener diode.

[0044] Specifically, the Zener diode ZD includes three pins, wherein the first pin Y1 of the Zener diode ZD is connected between the first resistor R1 and the second resistor R2, the second pin Y2 of the Zener diode ZD is connected to the third resistor R3, the other end of the third resistor R3 is connected to the first end D1 of the motor M, and the third pin Y3 of the Zener diode ZD is connected to the second end D2 of the motor M.

[0045] In addition, when the electromotive force generated by the motor is large and a single voltage regulator diode ZD cannot meet the control requirements, the number of the first voltage regulator switches 310 can be multiple, and the multiple first voltage regulator switches 310 are connected in series. After the series connection, one end is connected to the second end D2 of the motor M, one end is connected to the third resistor R3, and the other end is connected between the first resistor R1 and the second resistor R2.

[0046] In one embodiment, the second voltage stabilizing switch 320 is a field effect transistor, such as an NMOS transistor. Specifically, the source S of the NMOS transistor is connected to the third pin Y3 of the voltage stabilizing diode ZD, the gate G of the NMOS transistor is connected to the second pin Y2, the drain D of the NMOS transistor is connected to one end of the load R4, and the other end of the load R4 is connected to the first end D1 of the motor M.

[0047] It can be seen from the above connection relationship that when the toilet seat cover is opened and closed normally, the first voltage regulator switch 310 is turned on, and at the same time, the source S and the drain D of the NMOS tube are turned on, and a conductive loop is formed between the load R4 and the motor M. The load R4 can convert the electromotive force generated by the motor into heat energy output. At this time, the current in the circuit loop is stable, and the voltage between the first pin Y1 and the second pin Y2 is used as the reference voltage, and the electromotive force at both ends of the motor 200 corresponding to the reference voltage is used as the reference electromotive force.

[0048] After the overload protection control is performed, when the toilet seat cover is opened and closed violently, the motor M will rotate too fast, and a large electromotive force will be generated at both ends of the motor M. At this time, the electromotive force is greater than the reference electromotive force, the voltage regulator diode ZD is broken down, and the current is reversed, which causes the voltage at the gate G of the NMOS tube to drop, so that the source S and drain D of the NMOS tube are no longer conductive. At this time, the load R4 is disconnected from the motor M, and the load R4 no longer serves as the load resistance of the motor M. As a result, the current in the motor circuit drops greatly, and it can no longer generate a large torque load on the motor itself and components such as the toilet seat cover, thereby avoiding the occurrence of parts breakage and failure.

[0049] As can be seen from the above, the embodiment of the present application utilizes the fact that when the toilet seat cover is opened and closed violently, the motor speed is higher than that in normal use. Therefore, the greater the motor speed, the greater the potential difference generated. The voltage regulator diode ZD will be broken down and thus turned on when the voltage is relatively large. The conduction loop between the motor and the load is disconnected through the NMOS tube, so that a large current cannot be generated in the motor circuit. The process of violently opening and closing the toilet seat cover does not bring about an unlimited torque load, and the torque control quantity is converted into control of the motor circuit current, thereby protecting the entire transmission chain of the smart toilet.

[0050] The toilet lid overload protection circuit in the embodiment of the utility model comprises a load, a motor and an overload protection unit, wherein the motor is connected to the toilet seat cover and is used for forward or reverse rotation when the toilet seat cover is pressed down or flipped up, and the overload protection unit comprises a first voltage regulator switch and a second voltage regulator switch; specifically, the first voltage regulator switch and the second voltage regulator switch are connected at both ends of the motor; when the electromotive force generated in the motor is less than or equal to the reference electromotive force, the second voltage regulator switch is turned on and the load is connected to the motor; when the electromotive force generated in the motor is greater than the reference electromotive force, the first voltage regulator switch is broken down, the second voltage regulator switch is turned off, and the load is disconnected from the motor.

[0051] The embodiment of the present application replaces the scheme of using a mechanical device "safety clutch" in the related art to control the torque limit in the transmission chain with a scheme of controlling the motor load, thereby simplifying the complexity of the components. In addition, when the toilet seat cover is opened and closed, the toilet seat cover drives the motor to rotate and generates electricity to control the motor circuit. In other words, even when the smart toilet is powered off, it can cope with the situation where the toilet seat cover is violently opened and closed, providing a reliable flap overload protection function and improving the performance of the product. At the same time, most of the parts of the mechanical device in the related art are non-standard parts, which makes the development, testing, and process control of the smart toilet more complicated, while all components in the toilet flap overload protection circuit of the embodiment of the present application can use standard components, which increases the reliability of the entire structure.

[0052] An embodiment of the present application also provides a toilet seat cover, comprising a toilet flap overload protection circuit as described in any one of the above embodiments, wherein the toilet seat cover is connected to a motor in the toilet flap overload protection circuit.

[0053] An embodiment of the present application also provides a smart toilet, which includes a toilet flap and a toilet flap overload protection circuit provided by any of the above embodiments, wherein the toilet seat cover is connected to a motor in the toilet flap overload protection circuit.

[0054] It should also be understood that the various implementations provided in the embodiments of the present utility model can be combined arbitrarily to achieve different technical effects.

[0055] The above is a specific description of the preferred implementation of the utility model, but the utility model is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions under the shared conditions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of the utility model.

Claims

1. A toilet lid overload protection circuit, It is characterized in that include: load; The motor is connected to the toilet seat cover and is used to rotate forward or reverse when the toilet seat cover is pressed down or flipped up; An overload protection unit comprises a first voltage stabilizing switch and a second voltage stabilizing switch; the first voltage stabilizing switch and the second voltage stabilizing switch are connected to two ends of the motor, and the second voltage stabilizing switch is connected to the load; When the electromotive force generated in the motor is less than or equal to a preset reference electromotive force, the second voltage stabilizing switch is turned on, and the load is connected to the motor; When the electromotive force generated in the motor is greater than the reference electromotive force, the first voltage stabilizing switch is broken down, the second voltage stabilizing switch is disconnected, and the load is disconnected from the motor.

2. The toilet lid overload protection circuit according to claim 1, It is characterized in that It also includes a voltage-dividing resistor unit, which includes a third resistor. The third resistor is connected in series with the first voltage-stabilizing switch.

3. The toilet lid overload protection circuit according to claim 2, It is characterized in that The voltage-dividing resistor unit further includes a first resistor and a second resistor. The first resistor and the second resistor are connected in series and are connected to two ends of the motor.

4. The toilet lid overload protection circuit according to claim 3, It is characterized in that The first voltage regulator switch is a voltage regulator diode; the first pin of the voltage regulator diode is connected between the first resistor and the second resistor, the second pin of the voltage regulator diode is connected to the third resistor, the other end of the third resistor is connected to the first end of the motor, and the third pin of the voltage regulator diode is connected to the second end of the motor.

5. The toilet lid overload protection circuit according to claim 4, It is characterized in that The second voltage regulator switch is a field effect transistor, the source of the field effect transistor is connected to the third pin, the gate of the field effect transistor is connected to the second pin, the drain of the field effect transistor is connected to one end of the load, and the other end of the load is connected to the first end of the motor.

6. The toilet lid overload protection circuit according to claim 5, It is characterized in that The second voltage stabilizing switch is an NMOS tube.

7. The toilet lid overload protection circuit according to claim 1, It is characterized in that There are multiple first voltage stabilizing switches, and the multiple first voltage stabilizing switches are connected in series.

8. A toilet seat cover, It is characterized in that include: The toilet cover overload protection circuit according to any one of claims 1 to 7; The toilet seat cover is connected to the motor in the toilet flap overload protection circuit.

9. A smart toilet, It is characterized in that include: A toilet seat cover and a toilet flap overload protection circuit as claimed in any one of claims 1 to 7; The toilet seat cover is connected to the motor in the toilet flap overload protection circuit.

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