Safety simulation test circuit of an electric toothbrush holder

Abstract

A safety simulation test circuit for an electric toothbrush holder of the present application includes: a PMIC protection circuit module, a step-down module, a power management module, a hazard test circuit, and an electrical device; the input end of the PMIC protection circuit module is connected to an external power supply, the output end of the PMIC protection circuit module is connected to the input end of the step-down module, the output end of the step-down module is connected to the input end of the power management module, the output end of the power management module is connected to the input end of the hazard test circuit, and the output end of the hazard test circuit is connected to the electrical device. Hazard tests can be carried out by using the hazard test circuit to replace the electronic component originals in the circuit, which can solve the problem that in the prior art, direct tests are used for hazard tests. When there are faults and abnormalities in the circuit, it is easy to damage the electronic components in the product, resulting in higher production costs.

Description

Technical Field

[0001] This application relates to the field of circuit testing, and particularly to a safety simulation test circuit for an electric toothbrush holder. Background Art

[0002] Traditional toothbrushes are difficult to completely remove dental plaque. Coupled with improper brushing methods, the cleaning effect of brushing is greatly reduced. With the advent of electric toothbrushes, people have begun to try using electric toothbrushes, and electric toothbrushes have been sought after by more and more people due to their strong cleaning ability and good comfort.

[0003] The electric toothbrush charging stand, as a power supply station for electric toothbrushes, has also become an essential accessory for electric toothbrushes. When electric toothbrushes and charging stands are produced, a series of dangerous tests will be carried out to ensure the safe use of the products. The existing electric toothbrush charging stands generally adopt a direct test method. When there are faults and abnormalities in the circuit, it is easy to damage the electronic components in the product, resulting in higher production costs. Summary of the Invention

[0004] A safety simulation test circuit for an electric toothbrush holder provided by this application aims to solve the problem in the prior art that when electric toothbrushes are subjected to dangerous tests, a direct test method is adopted. When there are faults and abnormalities in the circuit, it is easy to damage the electronic components in the product, resulting in higher production costs.

[0005] This application provides a safety simulation test circuit for an electric toothbrush holder, including: a PMIC protection circuit module, a buck module, a power management module, a dangerous test circuit, and an electrical device;

[0006] Among them, the input end of the PMIC protection circuit module is connected to an external power supply for protecting the entire circuit. The output end of the PMIC protection circuit module is connected to the input end of the buck module. The output end of the buck module is connected to the input end of the power management module. The buck module is used to convert the voltage output by the PMIC protection circuit module into the voltage when the power management module works normally. The output end of the power management module is connected to the input end of the dangerous test circuit. The power management module is used to manage the circuit power supply. The output end of the dangerous test circuit is connected to the electrical device. The dangerous test circuit is used to perform dangerous simulation tests, and the electrical device is used as the electrical load of the safety simulation test circuit.

[0007] Preferably, the safety simulation test circuit further includes an analog switch module and a wireless charging module. The input end of the analog switch module is connected to the output end of the PMIC protection circuit module. The output end of the analog switch module is connected to the wireless charging module. The analog switch module is further connected to the power management module through an enable end. The wireless charging module is also connected to the power management module. The analog switch module, the power management module, and the wireless charging module are connected to form a feedback circuit. The wireless charging module is used to charge an external device. When the wireless charging module detects that the external device has completed charging, the power management module controls the analog switch module to turn off.

[0008] Preferably, the power management module includes a CPU power management unit and an embedded test unit. The input ends of both the CPU power management unit and the embedded test unit are connected to the power input interface of the power management module. The electrical device includes a driver and an LCD panel. The output end of the CPU power management unit is connected to the input end of the driver. The output end of the embedded test unit is connected to the input end of the hazard test circuit. The output end of the hazard test circuit is connected to the LCD panel.

[0009] Preferably, the PMIC protection circuit module includes a diode (D1), a first thermal fuse (FU1), a second thermal fuse (FU2), and a first zener diode (ZD1). The positive electrode of the diode (D1) is connected to the positive electrode of the external power supply. The negative electrode of the diode (D1) is connected to the first end of the first thermal fuse (FU1). The second end of the first thermal fuse (FU1) is respectively connected to the negative electrode of the first zener diode (ZD1) and the input end of the analog switch module. The first end of the second thermal fuse (FU2) is connected to the negative electrode of the external power supply. The second end of the second thermal fuse (FU2) is respectively connected to the positive electrode of the first zener diode (ZD1) and the ground terminal.

[0010] Preferably, the input power supply of the electrical device has two types. One is the working power supply output by the CPU power management unit, and the other is the test power supply output by the embedded test unit.

[0011] Preferably, the hazard test circuit includes a first fuse TBD and a test component. The first end of the first fuse TBD is connected to the output end of the embedded test unit. The second end of the first fuse TBD is connected to the positive electrode of the test component. The negative electrode of the test component is connected to the LCD panel.

[0012] Preferably, the hazard test circuit includes a second fuse TBD, the first end of the second fuse TBD is connected to the CPU power management unit, and the second end of the second fuse TBD is connected to the input end of the driver.

[0013] Preferably, the test element is a first resistor array, the embedded test unit is embedded in the power management module, and the embedded test unit is a second resistor array.

[0014] Preferably, the resistance value of the first resistor array is 480Ω.

[0015] Preferably, the resistance value of the second resistor array is 6Ω.

[0016] Preferably, the buck module includes a first voltage transformation circuit and a second voltage transformation circuit. The first voltage transformation circuit can step down the 12V voltage to 5V voltage, and the second voltage transformation circuit can change the 5V voltage to 3.8 - 4.2V voltage.

[0017] A safety simulation test circuit for an electric toothbrush holder according to the present application includes: a PMIC protection circuit module, a buck module, a power management module, a hazard test circuit, and an electrical device; the input end of the PMIC protection circuit module is connected to an external power supply, the output end of the PMIC protection circuit module is connected to the input end of the buck module, the output end of the buck module is connected to the input end of the power management module, the output end of the power management module is connected to the input end of the hazard test circuit, and the output end of the hazard test circuit is connected to the electrical device. Hazard testing can be performed by using the hazard test circuit to replace the original electronic components in the circuit, which can solve the problem in the prior art that direct testing is used for hazard testing. When there are faults and abnormalities in the circuit, it is easy to damage the electronic components in the product, resulting in higher production costs. Description of the Drawings

[0018] Figure 1 It is a circuit diagram of a safety simulation test circuit for an embodiment;

[0019] Figure 2 It is a partial circuit diagram of a safety simulation test circuit for an embodiment.

[0020] Figure 3 It is a partial circuit diagram of a safety simulation test circuit for another embodiment.

[0021] The realization, functional features, and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0022] It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0024] Referring to Figure 1 and Figure 2 , it is a safety simulation test circuit of an electric toothbrush holder provided by this application, including: a PMIC protection circuit module 1, a step-down module 4, a power management module 5, a hazard test circuit 6, and an electrical device 7;

[0025] Among them, the input end of the PMIC protection circuit module 1 is connected to an external power supply for protecting the entire circuit. The output end of the PMIC protection circuit module 1 is connected to the input end of the step-down module 4. The output end of the step-down module 4 is connected to the input end of the power management module 5. The step-down module 4 is used to convert the voltage output by the PMIC protection circuit module 1 into the voltage when the power management module 5 operates normally. The output end of the power management module 5 is connected to the input end of the hazard test circuit 6. The power management module 5 is used to manage the circuit power supply. The output end of the hazard test circuit 6 is connected to the electrical device 7. The hazard test circuit 6 is used to perform a hazard simulation test. The electrical device 7 serves as the electrical load of the safety simulation test circuit.

[0026] As described above, the safety simulation test circuit of the electric toothbrush holder provided in this embodiment includes: a PMIC protection circuit module 1, a step-down module 4, a power management module 5, a hazard test circuit 6, and an electrical device 7; among them, in a specific scenario of this embodiment, the electrical device 7 is an LCD screen with a driver 71 and an LCD panel;

[0027] There is a thermal fuse in the PMIC protection circuit module 1. The PMIC protection circuit module 1 is a detection circuit. Among them, PMIC (Power Management Integrated Circuit) is the abbreviation of power management integrated circuit. There is a thermal fuse in the PMIC protection circuit module 1. The PMIC protection circuit module 1 is a detection circuit and can be connected to a 12V DC power supply. When the voltage flowing into the PMIC protection circuit module is greater than 14V, the PMIC protection circuit module 1 will consume all power and convert it into heat. It can be connected to a 12V DC power supply. When a power failure occurs, the PMIC protection circuit module 1 will not convert. When the voltage of the external power supply connected to the circuit is too high, the thermal fuse set in the PMIC protection circuit module 1 will be blown to form an open circuit, and the current will not flow to other electronic components in the circuit. Therefore, the circuit can be protected. There are two-stage step-down circuits in the step-down module 4. The first voltage conversion circuit can step down the 12V voltage to 5V voltage, and the second voltage conversion circuit can convert the 5V voltage into a voltage acceptable to the CPU in the power management module 5, which is 3.8 - 4.2V voltage, the power management module 5 is a microcomputer system based on MK6761. The microcomputer system can integrate multiple external devices such as Bluetooth, GSM communication devices, speakers, etc., to diversify the product functions. There are three interfaces in the power management module 5, namely "GPIO 1", "GPIO 2", and "GND". The wireless charging module 2 is a wireless charger of model MMC-100. The status interface of the charger MMC-100 is connected to "GPIO 1" of the power management module 5, and its ground terminal is connected to "GND" of the power management module 5. Another pin on the analog switch module 3 is connected to the "GPIO 2" pin of the power management module 5. A detection circuit is set in the charger MMC-100. When the external device finishes charging, the detection circuit can send a pulse signal to the power management module 5. Then the power management module 5 will control the analog switch module 3 to turn off, making the circuit between the PMIC protection circuit module 1 and the wireless charging module 2 open. Then the charger MMC-100 will not continue to charge. At the same time, when the external device needs to be normally charged, the power management module 5 will control the analog switch module 3 to close the circuit, enabling the charger MMC-100 to charge the external device and releasing the 12V power from the Aquarius power supply to the wireless charging module 2. The enabling of MMC-100 has two states. The first is that during the charging of MMC-100, MMC-100 is enabled to be in the "LO" state. The second is that after the toothbrush finishes charging, the enable terminal of MMC-100 will be in the Hi-Z state. When the power plug is inserted, the enable terminal of MMC-100 is in the LO state, and the power management module 5 controls the analog switch module 3 to turn on to provide power for the wireless charger. When the power plug is unplugged, MMC-100 is enabled to be in the Hi-Z state, and the power management module 5 controls the analog switch module 3 to disconnect to cut off the power of the wireless charger. The hazard test circuit 6 includes a first fuse TBD 61 (fuse is the English name for fuse, and fuse TBD is the fuse circuit) and a light-emitting diode (VD). The first end of the first fuse TBD 61 is connected to the output terminal of the embedded test unit 52, the second end of the first fuse TBD 61 is connected to the positive electrode of the light-emitting diode (VD), and the negative electrode of the light-emitting diode (VD) is connected to the LCD panel 72;.

[0028] Meanwhile, when the electric toothbrush is connected to a power source for charging, if the PMIC protection circuit module 1 fails or the buck module 4 fails, the input power flow of the charger will be directly injected into the power management module 5. Therefore, a 480-ohm resistor array can be used in the hazard test circuit 6 to replace the light-emitting diode (VD) for hazard testing. In this way, if the PMIC protection circuit module 1 fails, the fuse TBD in the hazard test circuit 6 will blow when the flowing voltage is too high, preventing the excessive voltage and current after boosting from damaging the electrical equipment 7. The first fuse TBD 61 will have an inhibitory effect on the front buck module 4. When the first fuse TBD 61 detects an abnormal circuit current after boosting, it will cause the buck module to malfunction, thus triggering the protection circuit module of the previous PMIC;

[0029] A 6-ohm resistor array can also be used to replace the CPU power management unit 51 in the power management module 5 for hazard testing to simulate abnormal circuit conditions caused by different reasons. Compared with various components in the circuit, using a resistor array to replace various components in the circuit for hazard testing can reduce component damage and lower production test costs.

[0030] In one embodiment, the safety simulation test circuit further includes a wireless charging module 2 and a analog switch module 3. The output end of the analog switch module 3 is connected to the wireless charging module 2. The enable end of the analog switch module 3 is also connected to the power management module 5. The wireless charging module 2 is further connected to the power management module 5. The analog switch module 3 is connected to the power management module 5 and the wireless charging module 2 to form a feedback circuit. The wireless charging module 2 is used to charge an external device and detect its power. When the wireless charging module 2 detects that the external device has completed charging, the power management module 5 controls the analog switch module 3 to turn off.

[0031] As described above, there are three interfaces in the power management module 5, namely "GPIO 1", "GPIO 2", and "GND". The wireless charging module 2 is a wireless charger of the MMC-100 model. The status interface of the charger MMC-100 is connected to "GPIO 1" of the power management module 5, and its ground terminal is connected to "GND" of the power management module 5. There is another pin on the analog switch module 3 connected to the "GPIO 2" pin of the power management module 5. A detection circuit is provided inside the charger MMC-100. When the external device finishes charging, the detection circuit can send a pulse signal to the power management module 5, and then the power management module 5 will control the analog switch module 3 to turn off, causing an open circuit between the PMIC protection circuit module 1 and the wireless charging module 2, so that the charger MMC-100 will not continue to charge. At the same time, when the external device needs to be normally charged, the power management module 5 will control the analog switch module 3 to close the circuit, enabling the charger MMC-100 to charge the external device and release the 12V power from the Aquarius power supply to the wireless charging module 2. The enabling of MMC-100 has two states. The first is that during the charging of MMC-100, MMC-100 is enabled to the "LO" state. The second is that after the toothbrush finishes charging, the enable terminal of MMC-100 will be in the Hi-Z state. When the power plug is inserted, the enable terminal of MMC-100 is in the LO state, and the power management module 5 controls the analog switch module 3 to turn on to provide power to the wireless charger. When the power plug is unplugged, MMC-100 is enabled to the Hi-Z state, and the power management module 5 controls the analog switch module 3 to turn off to cut off the power of the wireless charger.

[0032] In one embodiment, the PMIC protection circuit module 1 includes a diode (D1), a first thermal fuse (FU1), a second thermal fuse (FU2), and a first zener diode (ZD1). The positive electrode of the diode (D1) is connected to the positive electrode of the external power supply, the negative electrode of the diode (D1) is connected to the first end of the first thermal fuse (FU1), the second end of the first thermal fuse (FU1) is respectively connected to the negative electrode of the first zener diode (ZD1) and the input end of the analog switch module 3. The first end of the second thermal fuse (FU2) is connected to the negative electrode of the external power supply, and the second end of the second thermal fuse (FU2) is respectively connected to the positive electrode of the first zener diode (ZD1) and the ground terminal.

[0033] As described above, the PMIC protection circuit module 1 includes a diode (D1), a first thermal fuse (FU1), a second thermal fuse (FU2), and a first zener diode (ZD1). The positive electrode of the diode (D1) is connected to the positive electrode of an external power supply, and the negative electrode of the diode (D1) is connected to the first end of the first thermal fuse (FU1). The second end of the first thermal fuse (FU1) is respectively connected to the negative electrode of the first zener diode (ZD1) and the input end of the analog switch module 3. The first end of the second thermal fuse (FU2) is connected to the negative electrode of the external power supply, and the second end of the second thermal fuse (FU2) is respectively connected to the positive electrode of the first zener diode (ZD1) and the ground terminal. When the current flowing into the PMIC protection circuit module 1 is greater than 14V, the first thermal fuse (FU1) will blow. At the same time, the first thermal fuse (FU1) and the second thermal fuse (FU2) can also be used to monitor the temperature of other semiconductor components when a fault occurs. For example, when the buck module 4 fails, it will also trigger the PMIC protection circuit module 1, causing the first thermal fuse (FU1) and the second thermal fuse (FU2) to blow.

[0034] Due to the unidirectional conductivity of the diode itself, that is, in a circuit, current can only flow into the diode from the positive electrode and flow out from the negative electrode. Therefore, if a fault occurs in the circuit, the current will not flow back from the negative electrodes of the diode (D1) and the first zener diode (ZD1), and will not cause damage to the components, thus protecting the circuit.

[0035] In one embodiment, the power management module 5 includes a CPU power management unit 51 and an embedded test unit 52. The input ends of the CPU power management unit 51 and the embedded test unit 52 are both connected to the power input interface of the power management module 5. The electrical device 7 includes a driver 71 and an LCD panel 72. The output end of the CPU power management unit 51 is connected to the input end of the driver 71. The output end of the embedded test unit 52 is connected to the input end of the hazard test circuit 6. The output end of the hazard test circuit 6 is connected to the LCD panel 72.

[0036] As described above, the embedded test unit 52 is embedded in the power management module 5. The rated power of the CPU in the CPU power management unit 51 is 5V 850mA. When conducting a test, an embedded test unit 52 can be embedded in the power management module 5. The CPU power management unit 51 can be replaced by a 6-ohm resistor array with a rated power of 4W to simulate a short circuit of the buck module 4 as a disaster cause for a hazard test. The replacement of components in the simulation can reduce the cost of the simulation test.

[0037] In one embodiment, the input power supply of the electrical device 7 has two types. One is the working power supply output by the CPU power management unit 51, and the other is the test power supply output by the embedded test unit 52.

[0038] As described above, the power supply of the LCD panel 72 comes from the power management module 5, and there are a total of 2 power supplies. One is the LED backlight power boost converter that outputs 19.2V 40mA (0.768W) by the embedded test unit 52, and the other is the LCD controller that outputs 1.8V and 30mA (0.054W) by the CPU power management unit 51, which is used for backlight driving to make the circuit work normally; for the driver 71, a 6-ohm resistor can be used to replace the driver 71 for hazard testing, and then power supplies with powers of 4, 6, 8, 10, 12, 14, and 16W can be directly injected into the 1.8V line and 19.2V line of the electrical device 7 for testing.

[0039] Refer to Figure 2 , in one embodiment, the hazard test circuit 6 includes a first fuse TBD 61 and a test element. The first end of the first fuse TBD 61 is connected to the output end of the embedded test unit 52, the second end of the first fuse TBD 61 is connected to the positive electrode of the test element, and the negative electrode of the test element is connected to the LCD panel 72.

[0040] As described above, in a normally operating circuit, the test element is a light-emitting diode (VD). When performing hazard analysis testing, a 480-ohm resistor array can be used to replace the light-emitting diode (VD) in the hazard test circuit 6 for hazard testing. In this way, if the PMIC protection circuit module 1 fails, the hazard test circuit 6 can prevent the over-boosted voltage and current from damaging the LCD panel module. The first fuse TBD 61 can inhibit the front-side buck module 4. When the first fuse TBD 61 detects an abnormal circuit current after boosting, it will cause the buck module to be abnormal, thereby triggering the protection circuit module of the previous PMIC. The first fuse TBD 61 is a fuse that can prevent excessive current from flowing to the electrical device 7 and causing damage.

[0041] Refer to Figure 3 , in one embodiment, the hazard test circuit 6 includes a second fuse TBD 62. The first end of the second fuse TBD 62 is connected to the CPU power management unit 51, and the second end of the second fuse TBD 62 is connected to the input end of the driver 71.

[0042] As described above, the second fuse TBD 62 is a fuse that can prevent excessive current from flowing to the driver 71 module and causing damage.

[0043] In one embodiment, during detection, the light-emitting diode (VD) can be replaced by a first resistor array. The embedded test unit 52 is embedded in the power management module 5, and the embedded test unit 52 can be replaced by a second resistor array.

[0044] In one embodiment, the resistance value of the first resistor array is 480 Ω.

[0045] In one embodiment, the resistance value of the second resistor array is 6 Ω.

[0046] As described above, since the CPU power management unit 51 can be connected to different external devices, such as components like Bluetooth and speakers, during the actual operation of the CPU power management unit 51, the CPU power management unit 51 will receive different voltages and raise the voltage of a certain pin to meet the power requirements of different external devices. The embedded test unit 52 embedded in the power management module 5 is a boost converter. During the hazard analysis test, a second resistor array can be used to replace the boost converter to reduce the test cost.

[0047] In one embodiment, the buck module 4 includes a first voltage conversion circuit and a second voltage conversion circuit. The first voltage conversion circuit can step down the 12V voltage to 5V voltage, and the second voltage conversion circuit can convert the 5V voltage to 3.8 - 4.2V voltage.

[0048] As described above, the buck module 4 is a two-stage buck. The first stage can step down the 12V voltage to 5V voltage, and the second stage can convert the 5V voltage to 3.8 - 4.2V voltage. Since the actual operating voltage of the Android device CPU in the power management module 5 is generally in the range of 4.2 - 3.8V, even if one buck is damaged, the other buck can protect other local circuits and prevent the entire circuit from being damaged.

[0049] In summary, a safety simulation test circuit for an electric toothbrush holder provided in an embodiment of the present application includes: a PMIC protection circuit module, a wireless charging module, a buck module, a power management module, a hazard test circuit, and an electrical device; an input end of the PMIC protection circuit module is connected to an external power supply, an output end of the PMIC protection circuit module is connected to an input end of the buck module and the wireless charging module, an output end of the buck module is connected to an input end of the power management module, an output end of the power management module is connected to an input end of the hazard test circuit, and an output end of the hazard test circuit is connected to the electrical device. A 480-ohm resistor array can be used to replace the light-emitting diode for hazard testing. Additionally, a 6-ohm resistor can be used to replace the CPU power management unit in the power management module for hazard testing, to simulate circuit anomalies caused by different reasons for testing. This can solve the problem in the prior art that direct testing is used for hazard testing, which easily damages the electronic components inside the product and increases the production cost when the circuit fails or is abnormal.

[0050] It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indicators will also change accordingly. The connections described can be direct connections or indirect connections.

[0051] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0052] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A safety simulation test circuit for an electric toothbrush holder, characterized in that Including: A PMIC protection circuit module, a buck module, a power management module, a hazard test circuit, and an electrical device; Among them, the input end of the PMIC protection circuit module is connected to an external power supply for protecting the entire circuit. The output end of the PMIC protection circuit module is connected to the input end of the buck module. The output end of the buck module is connected to the input end of the power management module. The buck module is used to convert the voltage output by the PMIC protection circuit module into the voltage when the power management module operates normally. The output end of the power management module is connected to the input end of the hazard test circuit. The power management module is used to manage the circuit power. The output end of the hazard test circuit is connected to the electrical device. The hazard test circuit is used to perform a hazard simulation test. The electrical device serves as the electrical load of the safety simulation test circuit; Among them, the power management module includes a CPU power management unit and an embedded test unit. The input ends of both the CPU power management unit and the embedded test unit are connected to the power input interface of the power management module. The electrical device includes a driver and an LCD panel. The output end of the CPU power management unit is connected to the input end of the driver. The output end of the embedded test unit is connected to the input end of the hazard test circuit. The output end of the hazard test circuit is connected to the LCD panel; Among them, the electrical device has two input power supplies. One is the operating power supply output by the CPU power management unit, and the other is the test power supply output by the embedded test unit; Among them, the hazard test circuit includes a first fuse circuit and a test component. The first end of the first fuse circuit is connected to the output end of the embedded test unit. The second end of the first fuse circuit is connected to the positive pole of the test component. The negative pole of the test component is connected to the LCD panel; Among them, the test component is a first resistor array. The embedded test unit is embedded in the power management module, and the embedded test unit is a second resistor array.

2. The safety simulation test circuit of the electric toothbrush holder according to claim 1, characterized in that, It further includes an analog switch module and a wireless charging module. The input end of the analog switch module is connected to the output end of the PMIC protection circuit module. The output end of the analog switch module is connected to the wireless charging module. The analog switch module is also connected to the power management module through an enable terminal. The wireless charging module is also connected to the power management module. The analog switch module is connected to the power management module and the wireless charging module to form a feedback circuit. The wireless charging module is used to charge an external device. When the wireless charging module detects that the external device charging is completed, the power management module controls the analog switch module to turn off.

3. The safety simulation test circuit of the electric toothbrush holder according to claim 2, characterized in that, The PMIC protection circuit module includes a diode (D1), a first fuse (FU1), a second fuse (FU2), and a first zener diode (ZD1). The positive electrode of the diode (D1) is connected to the positive electrode of an external power supply. The negative electrode of the diode (D1) is connected to the first end of the first fuse (FU1). The second end of the first fuse (FU1) is respectively connected to the negative electrode of the first zener diode (ZD1) and the input end of the analog switch module. The first end of the second fuse (FU2) is connected to the negative electrode of the external power supply. The second end of the second fuse (FU2) is respectively connected to the positive electrode of the first zener diode (ZD1) and the ground terminal.

4. The safety simulation test circuit of the electric toothbrush holder according to claim 1, wherein The hazard test circuit includes a second insurance circuit. The first end of the second insurance circuit is connected to the CPU power management unit. The second end of the second insurance circuit is connected to the input end of the driver.

5. The safety simulation test circuit of the electric toothbrush holder according to claim 1, wherein The resistance value of the first resistor array is 480 Ω.

6. The safety simulation test circuit of the electric toothbrush holder according to claim 1, wherein, The resistance value of the second resistor array is 6 Ω.

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