Power strip with main and auxiliary control functions

Abstract

The utility model relates to the technical field of power strip circuits, and discloses a power strip circuit with main and auxiliary control functions, which comprises a power supply control module, a power detection module and an output module, and is characterized in that the power supply control module comprises a power supply chip U1; the power detection module comprises a power chip U2, and a No.1 pin of the power chip U2 is connected with a 5V power supply through a resistor R11; the output module comprises a main control chip U3, and a first pin of the chip U3 is connected with a resistor R15 through 5V voltage and is grounded through a capacitor C5. The socket has the advantages that the power-on and power-off conditions of the auxiliary control jack are controlled according to the power, the service life is long, and the safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of socket strips, in particular to a socket strip with main and auxiliary control functions. Background Art

[0002] With the rapid development of smart products, people's demand for convenience and practicality is increasing, and traditional wired power strips cannot meet more sophisticated functional requirements.

[0003] The existing socket strip circuit does not have the main and auxiliary control functions, and cannot identify the power size and control the power on and off of the auxiliary control socket according to the power size, thereby ensuring the service life and safety of the socket strip. Utility Model Content

[0004] 1. Technical Problems Solved

[0005] The technical problem to be solved by the utility model is that the existing socket strip circuit cannot control the power on and off status of the auxiliary control socket according to the power size.

[0006] 2. Technical Solution

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a socket strip with main and auxiliary control functions, comprising a shell, a power cord and a circuit board, the shell comprising an upper shell and a lower shell, the circuit board is connected to the lower shell, a plug slot is provided in the upper shell, an electrode sheet group is provided in the lower shell, the circuit board is electrically connected to the power cord and the electrode sheet group, and a power control module, a power detection module and an output module are integrated on the circuit board.

[0008] The power control module includes a power chip U1, which is connected to the live wire through an inductor L1, a diode D1, a diode D2 and a resistor R2, a pin of the power chip is connected to the neutral wire, a varistor TVR1 is connected in parallel between the live wire and the neutral wire, electrolytic capacitors CE1 and CE2 are connected in parallel to the varistor TVR1, a resistor R3 is connected in parallel to the inductor L1, the power chip U1 is connected to the electrolytic capacitor CE3 through the inductor L2, two ends of the electrolytic capacitor CE3 are respectively connected to a 5V power supply and a power ground, and a resistor R5 is connected in parallel to the electrolytic capacitor CE3;

[0009] The power detection module includes a power chip U2, wherein pin 1 of the power chip U2 is connected to a 5V power supply through a resistor R11, pins 2 and 3 of the power chip U2 are connected to a resistor R10 and a capacitor C2, a resistor R13 and a capacitor C4, respectively, a resistor R12 is connected between the resistors R10 and R13, one end of the resistor R12 is connected to an AC N input terminal, and the other end is connected to an AC N output terminal, the capacitors C2 and C4 are grounded, pin 4 of the power chip U2 is connected to an AC power supply through resistors R19, R20, R16 and R17, and pin 5 of the power chip U2 is grounded and connected to the resistor R11 through a capacitor C3;

[0010] The output module includes a main control chip U3, pin 1 of the chip U3 is connected to a resistor R15 through a 5V voltage and is grounded through a capacitor C5, pin 7 of the main control chip U3 is connected to the base of transistors Q1 and Q2, capacitors C1 and C6 are connected between the base and emitter of the transistors Q1 and Q2, the collectors of the transistors Q1 and Q2 are respectively connected to pin 1 of relays REL1 and REL2, pin 4 of the relays REL1 and REL2 is connected to a 5V voltage, diodes D3 and D4 are respectively connected in parallel to the relays REL1 and REL2, pin 3 of the relay REL1 is connected to the AC L input terminal, pin 2 is connected to the AC L output terminal, pin 3 of the relay REL2 is connected to the AC N input terminal, and pin 2 is connected to the AC N output terminal.

[0011] Furthermore, pin 5 of the main control chip U3 is connected to pin 1 of the pin hole CN1, pin 2 of the pin hole CN1 is grounded, pin 3 of the pin hole CN1 is connected to pin 3 of the main control chip U3, and pin 4 of the pin hole CN1 is connected to VDD.

[0012] Furthermore, the output module is electrically connected to an indicator light module, which includes LED1 and LED2. LED1 and LED2 are grounded through resistors R6 and R7 respectively, and pins 2 and 3 of the main control chip U3 are connected to LED1 and LED2 respectively.

[0013] Furthermore, pin No. 4 of the power chip U2 is grounded via a resistor R18, a capacitor C7 is connected in parallel to the resistor R18, and pin No. 4 of the power chip U2 is grounded.

[0014] 3. Beneficial Effects

[0015] The advantages of the utility model compared with the prior art are:

[0016] After the first main control jack is inserted into the load, the power size is identified. When the power size is lower than the module set power, the last four auxiliary control jacks will become powered-off; when the power size is higher than the module set power, the last four auxiliary control jacks will remain powered-on; the red indicator light indicates that the main control function is working normally, and the green indicator light indicates that the auxiliary control function is working normally, ensuring the service life and safety of the socket strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a circuit schematic diagram of the utility model.

[0018] Figure 2 This is a circuit schematic diagram of the power supply control module of the utility model.

[0019] Figure 3 This is a circuit schematic diagram of the power detection module of the utility model.

[0020] Figure 4 This is a circuit schematic diagram of the output module of the utility model.

[0021] Figure 5 It is a structural schematic diagram of the utility model.

[0022] Figure 6 It is a schematic diagram of the internal structure of the utility model.

[0023] Figure numerals: 1, upper shell, 2, lower shell, 3, circuit board, 4, power cord, 5, plug slot, 6, electrode sheet group. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0025] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the utility model are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0028] The utility model will now be further described in conjunction with the accompanying drawings.

[0029] Embodiment 1

[0030] Combined with Figure 2 , the AC mains 220V AC connects the varistor TVR1 to the neutral line N through the fuse resistor R2 to absorb the power surge. The fuse resistor R2 is then connected to the diodes D2 and D1 for rectification, and the AC power is rectified into DC power and connected to the π-type filter circuit composed of the inductor L1, the resistor R3, the electrolytic capacitor CE1 and the electrolytic capacitor CE2 for filtering, and then the power chip U1 is powered. The power chip U1 outputs 5V voltage through the output voltage segment of pin 1, and then filtered by the electrolytic capacitor CE3 and the resistor R5 to power the power detection module.

[0031] Combined with Figure 3 The 5V voltage obtained through rectification and filtering is connected to pin 1 of the power chip U2 through resistor R11 to provide power for the power chip; pins 2 and 3 of the power chip U2 are respectively connected to resistor R10 and capacitor C2, resistor R13 and capacitor C4 to resistor R12, one end of resistor R12 is connected to the AC N input terminal, and the other end is connected to the AC N output terminal for current sampling, and the other ends of capacitors C2 and C4 are connected to the ground; the AC power supply is connected to pin 4 of the power chip U2 through resistors R19, R20, R16, and R17 for voltage signal input; pin 5 of the power chip U2 is the power chip ground; pin 6 of the power chip U2 is connected to pin 4 of the MCU main control chip U3 in the output module to provide load power data to the main control chip U3, so that the back-end output module can control the main and auxiliary functions.

[0032] Combined with Figure 4After the power chip U2 detects the power, it outputs the signal to the MCU main control chip U3. Pin 1 of the main control chip U3 is connected to the resistor R15 through a 5V voltage and connected to the ground through the capacitor C5. After filtering, VDD supplies power to the main control chip U3. After receiving the signal, the main control chip U3 makes a judgment, and the output signal is connected to one end of the resistor R9 and R14 by pin 7 of the main control chip U3. The other end of the resistor is connected to the base of the transistor Q1 and Q2 respectively. The base of the transistor Q1 and Q2 is connected to the capacitor C1 respectively. , C6 to the emitter end to the ground; the collectors of transistors Q1 and Q2 are connected to the 1st pin of relays REL1 and REL2 respectively, the 5V voltage is connected to the 4th pin of relays REL1 and REL2, and diodes D3 and D4 are connected in parallel to protect the reverse voltage when the coil is turned on and off; the 3rd pin of relay REL1 is connected to the AC L input terminal, and the 2nd pin is connected to the AC L output terminal; the 3rd pin of relay REL2 is connected to the AC N input terminal, and the 2nd pin is connected to the AC N output terminal; when the MCU main control chip U3 judges When the output power is greater than 25W, relays REL1 and REL2 are energized, and the AC L and N output terminals are powered on; when the MCU main control chip U3 determines that the power is less than 25W, relays REL1 and REL2 are disconnected, and the AC L and N output terminals are powered off; the AC L terminal connects resistors R4 and R1 to pin 5 of the main control chip U3, and is connected to the ground through resistor R8 for zero-crossing detection, which can make the relay switch on and off at zero point, extending the service life of the relay; at the same time, pin 5 of the main control chip U3 is connected to the pinhole CN Pin 1 of the main control chip U3 and pin 2 of the pin hole CN1 are connected to the ground, pin 3 of the pin hole CN1 is connected to pin 3 of the main control chip U3, and pin 4 of the pin hole CN1 is connected to VDD, which is used to burn the program for the main control chip U3; pin 2 of the main control chip U3 is connected to one end of the red light LED1, and the other end is connected to the ground through a resistor R6, which plays a role in indicating the main control work; pin 3 of the main control chip U3 is connected to one end of the green light LED2, and the other end is connected to the ground through a resistor R7, which plays a role in indicating the sub-control work.

[0033] Embodiment 2

[0034] Combined with Figure 5-6 The shell includes an upper shell 1 and a lower shell 2, the circuit board 3 is connected to the lower shell 2, a plug-in slot 5 is provided in the upper shell 1, an electrode sheet group 6 is provided in the lower shell 2, and the circuit board 3 is electrically connected to the power cord 4 and the electrode sheet group 6.

[0035] On the basis of the first embodiment, when in use, the upper shell 1 and the lower shell 2 can be disassembled to facilitate the repair and maintenance of the interior. When the plug is connected to the socket strip, the plug slot 5 defines the position of the plug. The electrode sheet group 6 includes an L pole, an N pole and an E pole to ensure safety in use.

[0036] The utility model and its implementation are described, and such description is not restrictive. The drawings are only one of the implementations of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention of the utility model, they can design a structure and implementation example similar to the technical solution without creativity, which should belong to the protection scope of the utility model.

Claims

1. A socket strip with main and auxiliary control functions, comprising a housing, a power cord and a circuit board, wherein the housing comprises an upper housing and a lower housing, the circuit board is connected to the lower housing, a plug slot is provided in the upper housing, an electrode sheet group is provided in the lower housing, the circuit board is electrically connected to the power cord and the electrode sheet group, a power control module, a power detection module and an output module are integrated on the circuit board, and the characteristics are as follows: The power control module includes a power chip U1, which is connected to the live wire through an inductor L1, a diode D1, a diode D2 and a resistor R2, a pin of the power chip is connected to the neutral wire, a varistor TVR1 is connected in parallel between the live wire and the neutral wire, electrolytic capacitors CE1 and CE2 are connected in parallel to the varistor TVR1, a resistor R3 is connected in parallel to the inductor L1, the power chip U1 is connected to the electrolytic capacitor CE3 through the inductor L2, two ends of the electrolytic capacitor CE3 are respectively connected to a 5V power supply and a power ground, and a resistor R5 is connected in parallel to the electrolytic capacitor CE3; The power detection module includes a power chip U2, wherein pin 1 of the power chip U2 is connected to a 5V power supply through a resistor R11, pins 2 and 3 of the power chip U2 are connected to a resistor R10 and a capacitor C2, a resistor R13 and a capacitor C4, respectively, a resistor R12 is connected between the resistors R10 and R13, one end of the resistor R12 is connected to an AC N input terminal, and the other end is connected to an AC N output terminal, the capacitors C2 and C4 are grounded, pin 4 of the power chip U2 is connected to an AC power supply through resistors R19, R20, R16 and R17, and pin 5 of the power chip U2 is grounded and connected to the resistor R11 through a capacitor C3; The output module includes a main control chip U3, pin 1 of the chip U3 is connected to a resistor R15 through a 5V voltage and is grounded through a capacitor C5, pin 7 of the main control chip U3 is connected to the base of transistors Q1 and Q2, capacitors C1 and C6 are connected between the base and emitter of the transistors Q1 and Q2, the collectors of the transistors Q1 and Q2 are respectively connected to pin 1 of relays REL1 and REL2, pin 4 of the relays REL1 and REL2 is connected to a 5V voltage, diodes D3 and D4 are respectively connected in parallel to the relays REL1 and REL2, pin 3 of the relay REL1 is connected to the AC L input terminal, pin 2 is connected to the AC L output terminal, pin 3 of the relay REL2 is connected to the AC N input terminal, and pin 2 is connected to the AC N output terminal.

2. The socket strip with master and slave control functions according to claim 1, characterized in that: Pin 5 of the main control chip U3 is connected to pin 1 of the pin hole CN1, pin 2 of the pin hole CN1 is grounded, pin 3 of the pin hole CN1 is connected to pin 3 of the main control chip U3, and pin 4 of the pin hole CN1 is connected to VDD.

3. The socket strip with master and slave control functions according to claim 1, characterized in that: The output module is also electrically connected to an indicator light module, which includes LED1 and LED2. The LED1 and LED2 are grounded through resistors R6 and R7 respectively, and pins 2 and 3 of the main control chip U3 are connected to LED1 and LED2 respectively.

4. The socket strip with master and slave control functions according to claim 1, characterized in that: Pin No. 4 of the power chip U2 is grounded via a resistor R18 , a capacitor C7 is connected in parallel to the resistor R18 , and pin No. 4 of the power chip U2 is grounded.

Images