Socket tester

Abstract

The utility model discloses a socket tester, which comprises an insulating shell and a control circuit board, the control circuit board is arranged in the insulating shell, a live wire pin, a null line pin, a ground wire pin, a first indicator light, a second indicator light, a third indicator light and a fourth indicator light are arranged on the control circuit board, and the live wire pin, the null line pin and the ground wire pin partially extend out of the shell. The insulation shell is provided with four transparent windows or four lampshades corresponding to the first indicating lamp, the second indicating lamp, the third indicating lamp and the fourth indicating lamp. The control circuit board enables the first, second, third and fourth indicating lamps to emit light independently or simultaneously so as to display five different wiring states of the three-jack socket, and when no live wire is input into the three-jack socket, the first, second, third and fourth indicating lamps cannot emit light. The three-jack socket is convenient to use, can distinguish various states of the three-jack socket, and is low in manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of electrical testing equipment manufacturing technology, and in particular to a socket tester. Background Technology

[0002] Nowadays, socket testers are widely used to quickly determine the wiring status of three-hole sockets in power lines, thereby improving installation and maintenance efficiency.

[0003] For example, a utility model patent application with patent number 201910826007.1 and titled "A Multifunctional Socket Tester" was published on November 1, 2019. Its technical solution includes an outer housing, a circuit board located inside the outer housing, and a socket phase high / low level acquisition module and a voltage acquisition module located on the circuit board. A digital tube display screen is fixedly connected to the front surface of the outer housing, and the circuit board is equipped with a digital tube display module, a voice broadcast module, and a voice broadcast speaker. After the device is plugged into the socket, it can broadcast one of the following prompts: correct wiring, missing neutral wire, missing ground wire, reversed live / neutral wire, reversed live / ground wire, or reversed live / ground wire and missing ground. When the wiring is correct, the digital tube display screen can show the current mains voltage value. Simultaneously, the LED indicator on the function panel can display a logic table on the comparison panel to directly determine whether the socket wiring is correct or incorrect, greatly increasing the device's practicality.

[0004] The LED indicator lights on this type of tester require reference to the logic table on the panel to determine whether the socket wiring is correct or incorrect. This makes it inconvenient to use and prone to errors, especially in dimly lit places or when the outer casing is at an angle that makes it difficult to observe the logic table on the panel.

[0005] Although this tester compensates for this deficiency by using voice broadcasting, voice broadcasting requires a separate voice broadcasting module and a voice broadcasting speaker, which greatly increases manufacturing costs and reduces reliability. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a socket tester that is easy to use, can identify a variety of states of a three-hole socket, and has a low manufacturing cost.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows: a socket tester, comprising an insulating housing and a control circuit board, wherein the control circuit board is located inside the insulating housing, characterized in that: the control circuit board is equipped with a live wire pin, a neutral wire pin, a ground wire pin, a first indicator light, a second indicator light, a third indicator light, and a fourth indicator light, wherein the live wire pin, the neutral wire pin, and the ground wire pin extend outside the housing, and the insulating housing is provided with four transparent windows or four lamp covers corresponding to the first, second, third, and fourth indicator lights; when the live wire pin, the neutral wire pin, and the ground wire pin are simultaneously inserted into the corresponding holes of the three-hole socket to be tested, the control circuit board causes the first, second, third, and fourth indicator lights to light up individually or simultaneously to display five different wiring states of the three-hole socket; when there is no live wire input to the three-hole socket, the first, second, third, and fourth indicator lights do not light up.

[0008] The insulating housing includes a front housing and a rear housing, which are fixedly connected to each other. The transparent window or the lampshade is located at the lower part of the front and rear housings, and both ends of the transparent window or the lampshade extend to the end faces of the front housing and the rear housing, respectively. This design facilitates installation and ensures that the indicator light is easily observed regardless of the orientation of the insulating housing, making it more convenient to use.

[0009] Preferably, when the first indicator light is lit alone, it indicates that the three-hole socket is missing a ground wire; when the second indicator light is lit alone, it indicates that the three-hole socket is missing a neutral wire; when the third indicator light is lit alone, it indicates that the live wire and neutral wire of the three-hole socket are reversed; when the fourth indicator light is lit alone, it indicates that the live wire and ground wire of the three-hole socket are reversed; when the first, second, third, and fourth indicator lights are lit simultaneously, it indicates that the wiring of the three-hole socket is correct. In this way, by observing the individual or simultaneous illumination of the four indicator lights, five wiring states of the three-hole socket can be easily determined. Combined with the fact that none of the four indicator lights are lit, it is possible to determine whether the three-hole socket is connected to a live wire, and a sixth state of the three-hole socket can also be determined. This is convenient to use and determine, and can identify multiple working states of the three-hole socket.

[0010] In a further improvement, the control circuit board is provided with a voltage acquisition circuit, a central processor, and an indicator light circuit. The voltage acquisition circuit and the indicator light circuit are respectively electrically connected to the corresponding connection terminals of the central processor. The first indicator light, the second indicator light, the third indicator light, and the fourth indicator light are set on the indicator light circuit.

[0011] The voltage acquisition circuit provides judgment data to the central processor, which then controls the indicator lights in the indicator light circuit to illuminate or not illuminate.

[0012] Furthermore, after the central processor receives the real-time voltage signals of the live wire, neutral wire, and ground wire collected by the voltage acquisition circuit, it determines the timing phase difference of the voltage signals of the live wire, neutral wire, and ground wire, and then controls the indicator lights in the indicator light circuit to illuminate or de-illuminate. This facilitates the determination of the wiring status of the three-prong socket.

[0013] Furthermore, when the phase difference between the received live wire voltage signal and the phase difference between the neutral wire and the ground wire is 180 degrees, and the phase difference between the ground wire and the neutral wire is the same, all four indicator lights in the central processor control indicator circuit will light up to indicate that the three-hole socket is wired correctly.

[0014] When the phase difference between the received live wire voltage signal and the neutral wire is 180 degrees, and there is no signal on the ground wire, the first indicator light in the central processor control indicator circuit will light up separately, indicating that the three-hole socket is missing a ground wire.

[0015] When the phase difference between the received live wire voltage signal and the ground wire is 180 degrees, and there is no signal on the neutral wire, the second indicator light of the central processor control indicator circuit will light up separately, indicating that the three-hole socket is missing a neutral wire.

[0016] When the phase of the received live wire voltage signal is the same as the phase of the ground wire, and the phase of the neutral wire is 180 degrees different from the phase of the live wire and the ground wire, the third indicator light of the central processor control indicator circuit will light up separately, indicating that the live wire and neutral wire of the three-hole socket are reversed.

[0017] When the phase of the received live wire voltage signal is the same as the phase of the neutral wire, and the phase of the ground wire is 180 degrees different from the phase of the live wire and the neutral wire, the fourth indicator light of the central processor control indicator circuit will light up separately, indicating that the live wire and ground wire of the three-hole socket are reversed.

[0018] A further improvement is made: when no voltage signal is received from the live wire, none of the four indicator lights in the indicator light circuit should light up, indicating that there is no live wire in the three-hole socket.

[0019] Preferably, the first indicator light, the second indicator light, the third indicator light, and the fourth indicator light are all LED light emitters.

[0020] In a further improvement, the control circuit board is equipped with a leakage current trigger switch. Pressing the leakage current trigger switch will trip the leakage current circuit breaker at the front end of the power transmission line, thus facilitating the maintenance and wiring adjustment of the socket.

[0021] In a further improvement, the insulating housing is also equipped with a leakage current trigger button, which corresponds to and can press the leakage current trigger switch. A reset spring is provided between the leakage current trigger button and the control circuit board to facilitate the reset of the leakage current trigger switch.

[0022] This invention uses four indicator lights, which illuminate individually or simultaneously to display five different wiring states of a three-hole socket. When there is no live wire input, the first, second, third, and fourth indicator lights do not illuminate, indicating another state of the socket. This provides a direct and intuitive indication of the socket's various states, eliminating the need to consult complex logic tables on a control panel, making it more convenient to use. Furthermore, it can indicate six states of the socket, allowing for the identification of a wider range of conditions. Additionally, this invention achieves its functions simply through indicator lights, resulting in a simple structure, fewer indicator lights, and lower overall manufacturing costs. This invention also features good reliability and a long service life. Attached Figure Description

[0023] Figure 1 This is the front view of this utility model;

[0024] Figure 2 yes Figure 1 The left view;

[0025] Figure 3 yes Figure 1 Rear view;

[0026] Figure 4 This is an exploded perspective view of the present invention;

[0027] Figure 5 This is the circuit diagram of this utility model. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figures 1 to 5 As shown, a socket tester includes an insulating housing 1 and a control circuit board 2. The control circuit board 2 is located inside the insulating housing 1. The control circuit board 2 is equipped with a live wire pin 21, a neutral wire pin 22, a ground wire pin 23, a first indicator LED1, a second indicator LED2, a third indicator LED3, and a fourth indicator LED4. Parts of the live wire pin 21, neutral wire pin 22, and ground wire pin 23 extend outside the insulating housing 1. In this embodiment, the live wire pin 21, neutral wire pin 22, and ground wire pin 23 extend from the upper end of the insulating housing 1. Depending on different standards, the positions of the live wire pin 21 and neutral wire pin 22 can be interchanged. The insulating housing 1 is equipped with four lamp covers corresponding to the first indicator LED1, second indicator LED2, third indicator LED3, and fourth indicator LED4. The four lamp covers are respectively the first lamp cover 31, second lamp cover 32, third lamp cover 33, and fourth lamp cover 34. As an alternative, four transparent windows can also be provided on the insulating housing 1 corresponding to the four indicator lights.

[0030] When the live wire pin 21, neutral wire pin 22, and ground wire pin 23 are simultaneously inserted into the corresponding sockets of the three-hole socket under test, the control circuit board 2 causes the first indicator LED1, the second indicator LED2, the third indicator LED3, and the fourth indicator LED4 to light up individually or simultaneously to display five different wiring states of the three-hole socket. When there is no live wire input to the three-hole socket, the first indicator LED1, the second indicator LED2, the third indicator LED3, and the fourth indicator LED4 will not light up, indicating another state of the three-hole socket.

[0031] The insulating housing 1 includes a front housing 11 and a rear housing 12, which are first snapped together and then secured together with bolts. A front label 111 is affixed to the end face of the front housing 11, and a rear label 121 is affixed to the end face of the rear housing 12. The first lampshade 31, the second lampshade 32, the third lampshade 33, and the fourth lampshade 34 are located at the lower part of the front housing 11 and the rear housing 12, with both ends of the first lampshade 31, the second lampshade 32, the third lampshade 33, and the fourth lampshade 34 extending to the end faces of the front housing 11 and the rear housing 12, respectively. This design facilitates installation and ensures that the indicator light is easily visible regardless of the orientation of the insulating housing 1, making it more convenient to use.

[0032] When the first indicator LED1 is lit alone, it indicates that the three-hole socket is missing a ground wire; when the second indicator LED2 is lit alone, it indicates that the three-hole socket is missing a neutral wire; when the third indicator LED3 is lit alone, it indicates that the live wire and neutral wire of the three-hole socket are reversed; when the fourth indicator LED4 is lit alone, it indicates that the live wire and ground wire of the three-hole socket are reversed; when the first indicator LED1, the second indicator LED2, the third indicator LED3 and the fourth indicator LED4 are lit simultaneously, it indicates that the wiring of the three-hole socket is correct.

[0033] Combination Figure 4 , Figure 5 As further shown, the control circuit board 2 is provided with a voltage acquisition circuit 3, a central processor 4, and an indicator light circuit 5. The voltage acquisition circuit 3 and the indicator light circuit 5 are respectively electrically connected to the corresponding connection terminals of the central processor 4. The first indicator light LED1, the second indicator light LED2, the third indicator light LED3, and the fourth indicator light LED4 are set on the indicator light circuit 5. The voltage acquisition circuit 3 provides judgment data to the central processor 4, and the central processor 4 controls the indicator lights in the indicator light circuit 5 to light up or not light up.

[0034] The N terminal of voltage acquisition circuit 3 is soldered and electrically connected to the neutral wire pin 22, the E terminal of voltage acquisition circuit 3 is soldered and electrically connected to the ground wire pin 23, the L terminal of voltage acquisition circuit 3 is soldered and electrically connected to the live wire pin 21, and the ground wire pin 23 is also locked to the circuit board with a bolt.

[0035] When the central processor 4 receives the real-time voltage signals of the live wire, neutral wire, and ground wire collected by the voltage acquisition circuit 3, the central processor 4 determines the timing phase difference of the voltage signals of the live wire, neutral wire, and ground wire, and then controls the indicator lights in the indicator light circuit 5 to light up or not light up.

[0036] When the phase of the received live wire voltage signal is 180 degrees different from the phase of the neutral wire and the ground wire, and the phase of the ground wire and the neutral wire is the same, the four indicator lights of the central processor 4 control indicator circuit 5 will light up to indicate that the three-hole socket is wired correctly.

[0037] When the phase difference between the received live wire voltage signal and the neutral wire is 180 degrees, and there is no signal on the ground wire, the first indicator LED1 of the control indicator circuit 5 of the central processor 4 will light up alone, indicating that the three-hole socket is missing a ground wire.

[0038] When the phase difference between the received live wire voltage signal and the ground wire is 180 degrees, and there is no signal on the neutral wire, the second indicator LED2 of the control indicator circuit 5 of the central processor 4 will light up separately, indicating that the three-hole socket is missing a neutral wire.

[0039] When the phase of the received live wire voltage signal is the same as the phase of the ground wire, and the phase of the neutral wire is 180 degrees different from the phase of the live wire and the ground wire, the third indicator LED3 of the central processor 4 control indicator circuit 5 lights up separately, indicating that the live wire and neutral wire of the three-hole socket are reversed.

[0040] When the phase of the received live wire voltage signal is the same as the phase of the neutral wire, and the phase of the ground wire is 180 degrees different from the phase of the live wire and the neutral wire, the fourth indicator LED4 of the central processor 4 control indicator circuit 5 will light up separately, indicating that the live wire and ground wire of the three-hole socket are reversed.

[0041] When a signal indicating no live wire voltage is received, all four indicator lights in indicator light circuit 5 will fail to light up, indicating that there is no live wire in the three-hole socket.

[0042] The first indicator LED1, the second indicator LED2, the third indicator LED3, and the fourth indicator LED4 are all LED light emitters.

[0043] The control circuit board 2 is equipped with a leakage current trigger switch K1. When the leakage current trigger switch K1 is pressed, the leakage current air switch at the front end of the power transmission line trips and cuts off the power.

[0044] The insulating housing 1 is also equipped with a leakage trigger button 6, which corresponds to the leakage trigger switch K1 and can press the leakage trigger switch K1. A reset spring 7 is provided between the leakage trigger button 6 and the control circuit board 2.

[0045] Currently targeting Figure 5The circuit diagram further illustrates its function as follows:

[0046] Resistors R22 and R23 and fuse F2 constitute the protection circuit for the entire circuit.

[0047] The leakage current trigger switch K1 and resistor R2 constitute the circuit for RCD testing (leakage circuit breaker testing). When the leakage current trigger switch K1 is pressed, the ground current is extremely high, causing the external leakage circuit breaker to trip and disconnect the power.

[0048] Diodes D1, D2, D3, D4, D5, D6, D7, D8, and D9 form a full-wave rectifier circuit, which converts the 220V negative half-cycle circuit into a positive half-cycle, ensuring that the voltage to the left of resistor R1 is always positive.

[0049] Resistor R1, capacitors C16 and C1, diode D13, resistor R20, R21, R18, diode D14, capacitor C14, and inductor L1 form the peripheral circuit of AC-DC converter chip U2 (model XD308H can be selected), which converts AC voltage to DC voltage.

[0050] Capacitors C2, C10, C12, and C13 form the peripheral circuit of the voltage regulator chip U4 (model TX7533 can be selected), which converts the DC high voltage into 3.3V voltage to power the chip U1 of the central processor 4 (model HC89S003 can be selected).

[0051] Resistors R7, R8, and capacitor C7 form a voltage divider sampling circuit for the live wire, which collects the positive half-cycle signal of the live wire. The negative half-cycle signal is output as 0 due to the unidirectional conduction characteristic of diode D1.

[0052] Resistors R9, R10, and capacitor C8 form a ground voltage divider sampling circuit, which collects the positive half-cycle signal of the ground wire. The negative half-cycle signal is output as 0 due to the unidirectional conduction characteristic of diode D2.

[0053] Resistors R11, R12, and capacitor C9 form a neutral line voltage divider sampling circuit, which collects the positive half-cycle signal of the neutral line. The negative half-cycle signal is output as 0 due to the unidirectional conduction characteristic of diode D3.

[0054] When the chip U1 (model HC89S003) of the central processor 4 receives the real-time voltage signals of the live wire, neutral wire, and ground wire from the voltage divider sampling circuit composed of resistors R7-R12 and capacitors C7-C9, the chip U1 of the central processor 4 determines the timing phase difference of the voltage signals of the live wire, neutral wire, and ground wire.

[0055] When the phase of the received live wire voltage signal is 180 degrees different from the phase of the neutral wire and the ground wire, and the phase of the ground wire and the neutral wire is the same, it indicates that the wiring is correct. At this time, the chip U1 of the central processor 4 controls the four indicator lights of the indicator light circuit 5 to light up.

[0056] When the phase difference between the received live wire voltage signal and the neutral wire is 180 degrees, and there is no signal on the ground wire, this indicates that the connection is missing a ground wire. At this time, the chip U1 of the central processor 4 controls the first indicator LED1 of the indicator circuit 5 to light up alone.

[0057] When the phase difference between the received live wire voltage signal and the ground wire is 180 degrees, and there is no signal on the neutral wire, it indicates that the connection is missing a neutral wire. At this time, the chip U1 of the central processor 4 controls the second indicator LED2 of the indicator circuit 5 to light up alone.

[0058] When the phase of the received live wire voltage signal is the same as the phase of the ground wire, and the phase of the neutral wire is 180 degrees different from that of the live wire and the ground wire, it indicates that the live wire and the neutral wire are reversed. At this time, the chip U1 of the central processor 4 controls the third indicator LED3 of the indicator circuit 5 to light up alone.

[0059] When the phase of the received live wire voltage signal is the same as the phase of the neutral wire, and the phase of the ground wire is 180 degrees different from the live wire and the neutral wire, it indicates that the live wire and the ground wire are reversed. At this time, the central processor 412 controls the fourth indicator LED4 of the indicator circuit 5 to light up alone.

[0060] If there is no live wire, all four indicator lights in indicator light circuit 5 will go out.

[0061] The circuit also includes a buzzer warning circuit; when a wiring error occurs in the three-hole socket, buzzer B1 will sound to indicate the error. J1 in the circuit is the programming port for the U1 chip of the central processing unit 4, and J2 is the software debugging port.

[0062] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A socket tester, comprising an insulating housing and a control circuit board, wherein the control circuit board is located inside the insulating housing, characterized in that: The control circuit board is equipped with a live wire pin, a neutral wire pin, a ground wire pin, a first indicator light, a second indicator light, a third indicator light, and a fourth indicator light. The live wire pin, neutral wire pin, and ground wire pin extend outside the housing. The insulating housing has four transparent windows or four lamp covers corresponding to the first, second, third, and fourth indicator lights. When the live wire pin, neutral wire pin, and ground wire pin are simultaneously inserted into the corresponding holes of the three-hole socket under test, the control circuit board causes the first, second, third, and fourth indicator lights to light up individually or simultaneously to indicate five different wiring states of the three-hole socket. When there is no live wire input to the three-hole socket, the first, second, third, and fourth indicator lights will not light up.

2. A socket tester according to claim 1, characterized in that: The insulating housing includes a front housing and a rear housing, which are fixedly connected to each other. The transparent window or the lampshade is located at the lower part of the front housing and the rear housing, and the two ends of the transparent window or the lampshade extend to the end faces of the front housing and the rear housing, respectively.

3. A socket tester according to claim 1, characterized in that: When the first indicator light is lit alone, it indicates that the three-hole socket is missing a ground wire; when the second indicator light is lit alone, it indicates that the three-hole socket is missing a neutral wire; when the third indicator light is lit alone, it indicates that the live wire and neutral wire of the three-hole socket are reversed; when the fourth indicator light is lit alone, it indicates that the live wire and ground wire of the three-hole socket are reversed; when the first, second, third, and fourth indicator lights are lit simultaneously, it indicates that the wiring of the three-hole socket is correct.

4. A socket tester according to claim 1, characterized in that: The control circuit board is equipped with a voltage acquisition circuit, a central processor, and an indicator light circuit. The voltage acquisition circuit and the indicator light circuit are electrically connected to the corresponding connection terminals of the central processor. The first indicator light, the second indicator light, the third indicator light, and the fourth indicator light are set on the indicator light circuit. The voltage acquisition circuit provides judgment data to the central processor, which then controls the indicator lights in the indicator light circuit to illuminate or not illuminate.

5. A socket tester according to claim 4, characterized in that: After the central processor receives the real-time voltage signals of the live wire, neutral wire, and ground wire collected by the voltage acquisition circuit, the central processor determines the timing phase difference of the voltage signals of the live wire, neutral wire, and ground wire, and then controls the indicator lights in the indicator light circuit to light up or not light up.

6. A socket tester according to claim 5, characterized in that: When the phase of the received live wire voltage signal is 180 degrees different from the phase of the neutral wire and the ground wire, and the phase of the ground wire and the neutral wire is the same, the four indicator lights of the central processor control indicator circuit will light up to indicate that the three-hole socket is wired correctly. When the phase difference between the received live wire voltage signal and the neutral wire is 180 degrees, and there is no signal on the ground wire, the first indicator light in the central processor control indicator circuit will light up separately, indicating that the three-hole socket is missing a ground wire. When the phase difference between the received live wire voltage signal and the ground wire is 180 degrees, and there is no signal on the neutral wire, the second indicator light of the central processor control indicator circuit will light up separately, indicating that the three-hole socket is missing a neutral wire. When the phase of the received live wire voltage signal is the same as the phase of the ground wire, and the phase of the neutral wire is 180 degrees different from the phase of the live wire and the ground wire, the third indicator light of the central processor control indicator circuit will light up separately, indicating that the live wire and neutral wire of the three-hole socket are reversed. When the phase of the received live wire voltage signal is the same as the phase of the neutral wire, and the phase of the ground wire is 180 degrees different from the phase of the live wire and the neutral wire, the fourth indicator light of the central processor control indicator circuit will light up separately, indicating that the live wire and ground wire of the three-hole socket are reversed.

7. A socket tester according to claim 5, characterized in that: When no voltage signal is received from the live wire, none of the four indicator lights in the indicator light circuit will light up, indicating that there is no live wire in the three-hole socket.

8. A socket tester according to claim 1, characterized in that: The first indicator light, the second indicator light, the third indicator light, and the fourth indicator light are all LED light emitters.

9. A socket tester according to any one of claims 1 to 8, characterized in that: The control circuit board is equipped with a leakage current trigger switch. When the leakage current trigger switch is pressed, the leakage current air switch at the front end of the power transmission line trips and cuts off the power.

10. A socket tester according to claim 9, characterized in that: The insulating housing is also equipped with a leakage current trigger button, which corresponds to and can press the leakage current trigger switch. A reset spring is provided between the leakage current trigger button and the control circuit board.

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