Electric meter with electric leakage prompting function

Abstract

The invention discloses an electric meter with an electric leakage prompting function, and relates to the technical field of electric meters, the electric meter comprises an electric meter body, the upper end and the lower end of the electric meter body are respectively provided with a wire inlet terminal and a wire outlet terminal, and the wire inlet terminal and the wire outlet terminal are used for connecting a zero wire and a live wire; the upper part of the front surface of the ammeter body is provided with a display screen, the lower part of the front surface of the ammeter body is provided with an electric leakage detection groove, and the electric leakage detection groove is internally provided with an annular detection coil, a circuit board, a pull-in coil, an electric leakage prompt circuit, and four connecting terminals of two null lines and a live line. The electric leakage detection coil, the pull-in coil, the driving mechanism and the electric leakage prompt circuit are arranged in the electric meter, when the annular detection coil detects electric leakage, current is generated to enable a circuit in the circuit board to be connected, the pull-in coil is controlled to work, the pull-in coil enables the circuit to be disconnected through the driving mechanism, and the electric leakage prompt circuit prompts the electric leakage. Meanwhile, the electric leakage prompting circuit is controlled to be switched on, so that the prompting lamp is turned on, and the electric leakage condition can be timely found, the circuit is cut off and prompting signals are sent.

Description

Technical Field

[0001] This invention belongs to the field of electricity meter technology, and specifically relates to an electricity meter with leakage current indication function. Background Technology

[0002] In modern electricity use, safe electricity use is of paramount importance. As a key device for electricity measurement and monitoring, traditional electricity meters primarily focus on the function of measuring electrical energy, lacking effective detection and alerting methods for potential leakage problems in circuits. When a leakage occurs in a circuit, if it is not detected and addressed in a timely manner, it may lead to electric shock accidents, posing a serious threat to personal safety. It may also damage electrical equipment, or even cause fires, resulting in significant property losses and safety hazards to families and society.

[0003] A search revealed that Chinese patent CN114113721 B discloses a smart meter with a leakage current indication function, comprising a meter housing, a status display panel fixedly installed on the front end of the meter housing, a meter slot inside the meter housing, a meter body fixedly installed inside the meter slot, a monitoring slot inside the meter slot, a monitoring solenoid fixedly connected inside the monitoring slot, the monitoring solenoid being connected to both ends of the monitoring slot's inner wall, a status probe rotatably connected inside the meter slot, the status probe being located at one end of the monitoring solenoid, and a status indicator panel driven by the status probe being adapted to the status display panel. When leakage current occurs inside the meter slot, current is generated at both ends of the monitoring slot's inner wall, and this current flows inside the monitoring solenoid, generating a corresponding electromagnetic field. This electromagnetic field drives the status probe to deflect, thereby driving the status indicator panel to rotate and display the corresponding status.

[0004] This smart meter can only alert users to leakage current within the meter itself, but it cannot provide alerts for leakage current in external electrical circuits, thus failing to improve user electrical safety. Therefore, we propose a smart meter with leakage current alert functionality. Summary of the Invention

[0005] The purpose of this invention is to address the problem that existing electricity meters cannot alert to leakage current in the electrical circuit and cut off the electrical circuit in a timely manner, by providing an electricity meter with leakage current alert function.

[0006] The present invention is achieved through the following technical solution: an electricity meter with leakage current indication function, comprising an electricity meter body, wherein the upper end and the lower end of the electricity meter body are respectively provided with an inlet terminal and an outlet terminal for connecting the neutral wire and the live wire;

[0007] The upper front of the meter body is equipped with a display screen, and the lower part is equipped with a leakage detection groove. The leakage detection groove contains a ring detection coil, a circuit board, a pull-in coil, a leakage indication circuit, and four connection terminals for two neutral wires and two live wires. The two terminals of the neutral wires and the two terminals of the live wires are connected by overlapping metal parts to ensure circuit continuity. The ring detection coil is sleeved on the outside of the neutral and live wires, and the two leads of the ring detection coil are connected to the circuit board. The pull-in coil is located in the leakage detection groove, and the two leads of the pull-in coil are also connected to the circuit board.

[0008] The leakage current indication circuit includes an indication circuit power supply, indication line terminals, and an indication light; the positive and negative terminals of the indication circuit power supply are respectively connected to the two indication line terminals through wires, and the indication light is located on the outside of the meter body and is connected to the leakage current indication circuit.

[0009] The movable end of the suction coil is provided with a driving mechanism, which is used to drive the overlapping metal part away from the connection terminal and close to the two indicator line terminals, so that the leakage current indication circuit is connected.

[0010] When the live wire is connected to alternating current, the circuit generates a constantly changing magnetic field. This magnetic field also forms inside the closed magnetic ring, cutting through the external loop detection coil, which in turn generates an alternating current. When there is no leakage, the current in the neutral wire and the live wire are equal in magnitude and opposite in direction, resulting in equal and opposite magnetic fields. The magnetic fields inside the loop detection coil cancel each other out, and since there is no magnetic field, no current is generated. However, when a leakage occurs in the external circuit, some of the current in the live wire is lost, and the current returning through the neutral wire is less than... When the current in the live wire is applied, the magnetic field inside the loop detection coil becomes uneven, unable to cancel each other out. This causes the magnetic field to cut through the coil, generating current. This current flows to the circuit board, which contains a rectifier bridge and a thyristor, as shown in the diagram. When current flows through and reaches a certain value, the thyristor is triggered to conduct. At the moment of conduction, the live wire directly connects to the coil and then returns to the neutral wire. This causes the coil to pull the drive mechanism, moving the metal contact piece to the right and disconnecting it. Simultaneously, the metal contact piece connects to the leakage current indication circuit, illuminating the indicator light.

[0011] Preferably, the driving mechanism includes a connector, a driving rod, a connecting rod, and a top rod; the driving rod is vertically arranged and limited at the bottom of the leakage current detection tank by a first fixed seat; one end of the driving rod is fixedly connected to the connector, and the connector is connected to the movable end of the coil; the other end of the driving rod is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to one end of the top rod; the top rod is horizontally arranged and limited at the bottom of the leakage current detection tank by a second fixed seat.

[0012] The drive rod is also provided with a baffle on its outside, and a first spring is provided on the outside of the drive rod between the baffle and the first fixed seat.

[0013] When the coil is energized, the internal drive core retracts, pulling the drive rod downwards. The drive rod then moves one end of the connecting rod downwards, thereby driving the top rod to move to the right, displacing the metal parts from the connecting terminal and bringing them closer to the indicator terminal. When the coil is de-energized, the drive rod moves upwards again under the action of the first spring, and the connecting rod and the top rod return to their original positions.

[0014] Preferably, a moving mechanism is provided below the overlapping metal part. The moving mechanism includes a slide rail, a slider, and a connecting plate. There are two slide rails, symmetrically arranged at the bottom of the leakage current detection groove. A slider is slidably arranged on each slide rail. The two sliders are fixedly connected by the connecting plate. The middle part of the overlapping metal part is locked at the upper end of the two sliders. When the top rod moves to the right, it will press against the connecting plate, causing the entire moving mechanism to move to the right, thereby driving the overlapping metal part to move to the right.

[0015] Preferably, the upper end of the slider is U-shaped, and the overlapping metal part is stuck in the U-shaped inner cavity of the slider.

[0016] Preferably, the slider, slide rail, and connecting plate are all made of insulating material.

[0017] Preferably, a switch assembly is provided on one side of the meter body. The switch assembly includes a housing, a switch button, a reset rod, and a second spring. The housing is connected through to the side wall of the meter body, and the housing has a cavity inside. The switch button is slidably disposed in the cavity of the housing. The reset rod is fixedly connected to the inner end of the switch button, and the other end of the reset rod slides through the bottom of the housing and extends into the leakage current detection groove. The second spring is located in the cavity of the housing and is sleeved on the reset rod.

[0018] Preferably, the inner end of the recovery rod is provided with an elastic retaining ring on its outer side wall, and the inner wall of the outer shell is provided with a first limiting groove and a second limiting groove in sequence, both of which are ring-shaped.

[0019] When the indicator light illuminates, pressing the switch button moves the reset lever to the left, pressing against the connecting plate and causing the moving mechanism to move the overlapping metal piece to the left. When the elastic retaining ring reaches the first limit groove, the overlapping metal piece completely disengages from the indicator circuit terminal, and the indicator light goes out. After the leakage in the external circuit is resolved, pressing the switch button moves the elastic retaining ring to the second limit groove, allowing the reset lever to reconnect the overlapping metal piece to the connecting terminal, thus restoring the circuit.

[0020] Preferably, both the connection terminal and the indicator line terminal have two elastic contact pieces at their contact ends, and both sides of the contact pieces are arc-shaped and tilted upwards or downwards to facilitate the insertion of overlapping metal parts.

[0021] The present invention has the following advantages over the prior art:

[0022] 1. This invention incorporates a leakage detection coil, a coil engaging, a drive mechanism, and a leakage indication circuit inside the meter. When the ring detection coil detects a leakage, it generates current that connects the circuit in the circuit board, controlling the coil engaging. The coil engaging, through the drive mechanism, disconnects the circuit and simultaneously connects the leakage indication circuit, illuminating the indicator light. This allows for timely detection of leakage, circuit disconnection, and the issuance of an indication signal.

[0023] 2. This invention not only issues a warning signal for leakage in electrical circuits, but also promptly disconnects the leaking electrical circuit, thus providing a high level of safety protection.

[0024] 3. In this invention, the driving mechanism uses a coil to control the retraction of the driving rod, which in turn controls the connecting rod and the top rod to move to the right, driving the overlapping metal parts away from the connection terminal of the electrical circuit and closer to the indicator terminal of the leakage current indication circuit, thereby disconnecting the electrical circuit and connecting the leakage current indication circuit. Its structure is ingenious and requires no external power.

[0025] 4. The moving mechanism in this invention can increase the smoothness of movement of the overlapping metal parts and improve the reliability of circuit connection or disconnection.

[0026] 5. This invention allows for easy disconnection of the leakage current warning circuit and restoration of the power supply circuit via a switch assembly. In use, lightly press the switch button to move the elastic retaining ring into the first limit groove, which turns off the warning light; press the switch button harder to move the elastic retaining ring into the second limit groove, which restores the power supply circuit. The operation is convenient and simple. Attached Figure Description

[0027] Figure 1 A schematic diagram of a current meter with leakage current indication function;

[0028] Figure 2 This is a schematic diagram of the internal structure of an electricity meter with leakage current indication function;

[0029] Figure 3 A top view of an electricity meter with leakage current indication function;

[0030] Figure 4 This is a diagram of the internal components of a leakage detection slot in an electricity meter with leakage current indication function.

[0031] Figure 5A schematic diagram of the drive mechanism in an electricity meter with leakage current indication function;

[0032] Figure 6 A schematic diagram of the moving mechanism in an electricity meter with leakage current indication function;

[0033] Figure 7 This is a schematic diagram of the switching assembly in an electricity meter with leakage current indication function;

[0034] Figure 8 This is a control circuit diagram for an electricity meter with leakage current indication function.

[0035] The diagram shows the following components: 1. Meter body; 2. Display screen; 3. Incoming terminal; 4. Cover; 5. Outgoing terminal; 6. Indicator light; 7. Leakage detection slot; 8. Circuit board; 9. Circular detection coil; 10. Snatching coil; 11. Connecting terminal; 12. Drive mechanism; 13. Connecting metal part; 14. Moving mechanism; 15. Power supply; 16. Indicator line terminal; 17. Switch assembly.

[0036] 121. Connector; 122. Drive rod; 123. First fixed seat; 124. First spring; 125. Baffle; 126. Connecting rod; 127. Push rod; 128. Second fixed seat;

[0037] 141. Slide rail; 142. Slider; 143. Connecting plate;

[0038] 171. Outer casing; 172. Switch button; 173. Return rod; 174. Second spring; 175. Elastic retaining ring; 176. First limiting groove; 177. Second limiting groove. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figures 1-8 A current meter with leakage current indication function includes a current meter body 1, with an inlet terminal 3 and an outlet terminal 5 at the upper and lower ends of the current meter body 1, respectively, for connecting the neutral wire and the live wire.

[0041] The upper part of the front of the meter body 1 is provided with a display screen 2, and the lower part of the display screen 7 is provided with a leakage detection groove 7. The upper port of the leakage detection groove 7 is provided with a cover 4. One end of the cover 4 is connected to the meter body 1 by a hinge, and the other end is connected to the meter body 1 by a screw, which serves to protect the leakage detection groove 7.

[0042] The leakage current detection tank 7 is equipped with a ring detection coil 9, a circuit board 8, a pull-in coil 10, a leakage current indication circuit, and four connection terminals 11 for two neutral wires and two live wires. The two terminals of the neutral wire and the two terminals of the live wire are connected by a lap metal piece 13 to ensure circuit continuity. The lap metal piece 13 uses silver-tungsten alloy arc-resistant contacts, with a main circuit breaking stroke ≥5mm and a breaking time <10ms, significantly reducing arc energy. The ring detection coil 9 is sleeved on the outside of the neutral and live wires, and the two leads of the ring detection coil 9 are connected to the circuit board 8. The pull-in coil 10 is set in the leakage current detection tank 7, and the two leads of the pull-in coil 10 are also connected to the circuit board 8.

[0043] The leakage current indication circuit includes an indication circuit power supply 15, an indication line terminal 16, and an indication light 6; the positive and negative terminals of the indication circuit power supply 15 are respectively connected to the two indication line terminals 16 through wires, and the indication light 6 is located outside the meter body 1 and is connected to the leakage current indication circuit.

[0044] The movable end of the coil 10 is provided with a drive mechanism 12. The drive mechanism 12 is used to drive the overlapping metal piece 13 away from the connection terminal 11 and close to the two indicator line terminals 16, so that the leakage current indication circuit is connected.

[0045] Both the connection terminal 11 and the indicator line terminal 16 have two elastic contact pieces at their contact ends, and both sides of the contact pieces are arc-shaped and tilted upwards or downwards to facilitate the insertion of the overlapping metal piece 13.

[0046] An insulating arc-extinguishing cavity and an arc-blocking structure are provided in the area of ​​the connection terminal 11 and the indication line terminal 16 to achieve arc extinguishing before switching, thus eliminating the risk of ablation, electrical breakdown and fire.

[0047] When the live wire is connected to AC power, the circuit generates a constantly changing magnetic field. At this time, a magnetic field is also generated inside the closed magnetic ring. This constantly changing magnetic field cuts through the external loop detection coil 9, causing the loop detection coil 9 to generate an alternating current. When there is no leakage, the current in the neutral wire and the live wire are equal in magnitude and opposite in direction. Therefore, the magnetic fields generated are also equal in magnitude and opposite in direction. The magnetic fields inside the loop detection coil 9 cancel each other out, and since there is no magnetic field, the loop detection coil 9 does not generate current. When a leakage occurs in the external circuit, part of the current in the live wire is lost. At this time, the current returning from the neutral wire is less than the current in the live wire. The magnetic fields inside the loop detection coil 9 become uneven, unable to cancel each other out. This causes a magnetic field to cut through the coil, generating current in the loop detection coil 9. The current generated by the loop detection coil 9 flows to the circuit board 8, which contains a rectifier bridge and a thyristor. Figure 8 As shown, when current flows through and reaches a certain value, the thyristor will be triggered to conduct. At the moment of conduction, the live wire is directly connected to the coil 10 and then returns to the neutral wire, thereby causing the coil 10 to pull the drive mechanism 12, which moves the metal contact 13 to the right to disconnect it. At the same time, the metal contact 13 connects to the leakage current indication circuit, and the indicator light 6 lights up.

[0048] Please see Figure 5 In this embodiment, the driving mechanism 12 includes a connector 121, a driving rod 122, a connecting rod 126, and a top rod 127. The driving rod 122 is vertically arranged and is limited at the bottom of the leakage detection groove 7 by a first fixing seat 123. One end of the driving rod 122 is fixedly connected to the connector 121, and the connector 121 is connected to the movable end of the attracting coil 10. The other end of the driving rod 122 is rotatably connected to one end of the connecting rod 126, and the other end of the connecting rod 126 is rotatably connected to one end of the top rod 127. The top rod 127 is horizontally arranged and is limited at the bottom of the leakage detection groove 7 by a second fixing seat 128.

[0049] A baffle 125 is provided on the outside of the drive rod 122, and a first spring 124 is provided on the outside of the drive rod 122 between the baffle 125 and the first fixed seat 123.

[0050] When the coil 10 is energized, the internal drive core retracts, pulling the drive rod 122 downward. The drive rod 122 drives one end of the connecting rod 126 downward, thereby driving the top rod 127 to move to the right, driving the overlapping metal piece 13 away from the connecting terminal 11 and towards the indicator terminal 16. When the coil 10 is de-energized, under the action of the first spring 124, the drive rod 122 moves upward again, and the connecting rod 126 and the top rod 127 return to their original positions.

[0051] Please see Figure 6In this embodiment, a moving mechanism 14 is also provided below the overlapping metal part 13. The moving mechanism 14 includes a slide rail 141, a slider 142, and a connecting plate 143. There are two slide rails 141, which are symmetrically arranged at the bottom of the leakage detection groove 7. A slider 142 is slidably arranged on each slide rail 141. The two sliders 142 are fixedly connected by the connecting plate 143. The middle part of the overlapping metal part 13 is locked at the upper end of the two sliders 142. When the top rod 127 moves to the right, it will push against the connecting plate 143, causing the entire moving mechanism 14 to move to the right, thereby driving the overlapping metal part 13 to move to the right.

[0052] The upper end of the slider 142 is U-shaped, and the overlapping metal part 13 is engaged in the U-shaped inner cavity of the slider 142. The slider 142, the slide rail 141, and the connecting plate 143 are all made of insulating materials, such as plastic, to provide insulation and protection.

[0053] Please see Figure 7 In this embodiment, a switch assembly 17 is provided on one side of the meter body 1. The switch assembly 17 includes a housing 171, a switch button 172, a reset rod 173, and a second spring 174. The housing 171 is connected through to the side wall of the meter body 1. The housing 171 has a cavity inside. The switch button 172 is slidably disposed in the cavity of the housing 171. The reset rod 173 is fixedly connected to the inner end of the switch button 172, and the other end of the reset rod 173 slides through the bottom of the housing 171 and extends into the leakage detection groove 7. The second spring 174 is located in the cavity of the housing 171 and is sleeved on the reset rod 173.

[0054] An elastic retaining ring 175 is provided on the outer wall of the inner end of the recovery rod 173, and a first limiting groove 176 and a second limiting groove 177 are provided sequentially on the inner wall of the outer shell 171. Both the first limiting groove 176 and the second limiting groove 177 are ring-shaped.

[0055] When the indicator light 6 is lit, pressing the switch button 172 causes the reset lever 173 to move to the left, pressing against the connecting plate 143 to move to the left. This causes the moving mechanism 14 to move the overlapping metal piece 13 to the left. When the elastic retaining ring 175 reaches the first limit groove 176, the overlapping metal piece 13 is completely disengaged from the indicator circuit terminal 16, and the indicator light 6 goes out. After the leakage in the external circuit is resolved, pressing the switch button 172 causes the elastic retaining ring 175 to reach the second limit groove 177. The reset lever 173 can then reconnect the overlapping metal piece 13 to the connecting terminal 11, and the circuit is restored.

[0056] The working process of this invention:

[0057] When a leakage current occurs in the electrical circuit, the ring detection coil 9 generates current, which flows to the circuit board 8. The circuit board 8 is equipped with a rectifier bridge and a thyristor. Figure 8As shown, when current flows through and reaches a certain value, it triggers the conduction of the thyristor in the circuit. At the moment of conduction, the live wire directly connects to the coil 10 and then returns to the neutral wire, thus making the coil 10 work. Since it is directly connected to the live wire, it generates a strong magnetic attraction force, pulling the drive rod 122 downward. The drive rod 122 drives one end of the connecting rod 126 downward, thereby driving the top rod 127 to move to the right, driving the lap metal part 13 away from the connecting terminal 11 and towards the indicator line terminal 16, disconnecting the electrical circuit. At the same time, the lap metal part 13 connects to the leakage current indication circuit, and the indicator light 6 lights up, emitting an indication signal. This allows the meter to detect leakage current in a timely manner, cut off the circuit, and issue an indication signal, thus playing a high safety protection role.

[0058] When the user discovers the alarm prompt, by pressing the switch button 172, the reset lever 173 moves to the left, pressing the connecting plate 143 to move to the left, causing the moving mechanism 14 to drive the overlapping metal part 13 to move to the left. When the elastic retaining ring 175 reaches the first limit groove 176, the overlapping metal part 13 completely disengages from the prompt line terminal 16, and the prompt light 6 goes out.

[0059] Once the leakage in the external circuit is resolved, press the switch button 172 so that the elastic retaining ring 175 reaches the second limit groove 177, and the restoration rod 173 can reconnect the overlapping metal part 13 to the connection terminal 11, thus restoring the circuit.

[0060] In this invention, the driving mechanism 12 uses a coil 10 to control the retraction of the driving rod 122, which in turn controls the connecting rod 126 and the top rod 127 to move to the right. This drives the overlapping metal part 13 away from the connection terminal 11 of the electrical circuit and closer to the indicator terminal 16 of the leakage current indication circuit, thus disconnecting the electrical circuit and connecting the leakage current indication circuit. Its structure is ingenious and requires no external power. The moving mechanism 14 increases the smoothness of the movement of the overlapping metal part 13, improving the reliability of circuit connection or disconnection. The switch assembly 17 allows for easy disconnection of the leakage current indication circuit and restoration of the electrical circuit. In use, a light press of the switch button 172 causes the elastic retaining ring 175 to reach the first limit groove 176, extinguishing the indicator light 6; a firm press of the switch button 172 causes the elastic retaining ring 175 to reach the second limit groove 177, restoring the electrical circuit. Operation is convenient and simple.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electricity meter with leakage current indication function, comprising an electricity meter body (1), wherein the upper end and lower end of the electricity meter body (1) are respectively provided with an inlet terminal (3) and an outlet terminal (5) for connecting a neutral wire and a live wire, characterized in that: The upper part of the front of the meter body (1) is provided with a display screen (2), and the lower part is provided with a leakage detection groove (7). The leakage detection groove (7) is provided with a ring detection coil (9), a circuit board (8), a coil (10), a leakage indication circuit, and four connection terminals (11) for two neutral wires and two live wires. The two terminals of the neutral wire and the two terminals of the live wire are connected by a metal cladding piece (13) to make the circuit conductive. The ring detection coil (9) is sleeved on the outside of the neutral wire and the live wire, and the two leads of the ring detection coil (9) are connected to the circuit board (8). The coil (10) is set in the leakage detection groove (7), and the two leads of the coil (10) are also connected to the circuit board (8). The leakage current indication circuit includes an indication circuit power supply (15), an indication line terminal (16), and an indication light (6); the positive and negative terminals of the indication circuit power supply (15) are respectively connected to the two indication line terminals (16) through wires, and the indication light (6) is located outside the meter body (1) and is connected to the leakage current indication circuit. The movable end of the coil (10) is provided with a driving mechanism (12). The driving mechanism (12) is used to drive the overlapping metal piece (13) away from the connection terminal (11) and close to the two indicator line terminals (16) to connect the leakage current indicator circuit.

2. A current meter with leakage current indication function according to claim 1, characterized in that, The driving mechanism (12) includes a connector (121), a driving rod (122), a connecting rod (126), and a top rod (127). The driving rod (122) is vertically arranged and is limited at the bottom of the leakage detection groove (7) by a first fixed seat (123). One end of the driving rod (122) is fixedly connected to the connector (121), and the connector (121) is connected to the movable end of the coil (10). The other end of the driving rod (122) is rotatably connected to one end of the connecting rod (126), and the other end of the connecting rod (126) is rotatably connected to one end of the top rod (127). The top rod (127) is horizontally arranged and is limited at the bottom of the leakage detection groove (7) by a second fixed seat (128). The drive rod (122) is also provided with a baffle (125) on its outside, and a first spring (124) is provided on the outside of the drive rod (122) between the baffle (125) and the first fixed seat (123).

3. A current meter with leakage current indication function according to claim 2, characterized in that, Below the overlapping metal part (13) is a moving mechanism (14). The moving mechanism (14) includes a slide rail (141), a slider (142), and a connecting plate (143). There are two slide rails (141), which are symmetrically arranged at the bottom of the leakage detection groove (7). Each slide rail (141) is slidably provided with a slider (142). The two sliders (142) are fixedly connected by the connecting plate (143). The middle part of the overlapping metal part (13) is stuck on the upper end of the two sliders (142). When the top rod (127) moves to the right, it will push against the connecting plate (143), causing the entire moving mechanism (14) to move to the right, thereby driving the overlapping metal part (13) to move to the right.

4. A current meter with leakage current indication function according to claim 3, characterized in that, The upper end of the slider (142) is U-shaped, and the overlapping metal part (13) is stuck in the U-shaped inner cavity of the slider (142).

5. A current meter with leakage current indication function according to claim 3, characterized in that, The slider (142), slide rail (141) and connecting plate (143) are all made of insulating material.

6. A current meter with leakage current indication function according to any one of claims 1-5, characterized in that, The meter body (1) has a switch assembly (17) on one side. The switch assembly (17) includes a housing (171), a switch button (172), a reset rod (173), and a second spring (174). The housing (171) is connected through to the side wall of the meter body (1). The housing (171) has a cavity inside. The switch button (172) is slidably disposed in the cavity of the housing (171). The reset rod (173) is fixedly connected to the inner end of the switch button (172). The other end of the reset rod (173) slides through the bottom of the housing (171) and extends into the leakage detection groove (7). The second spring (174) is located in the cavity of the housing (171) and is sleeved on the reset rod (173).

7. A current meter with leakage current indication function according to claim 6, characterized in that, The inner end of the recovery rod (173) is provided with an elastic retaining ring (175) on the outer wall. The inner wall of the outer shell (171) is provided with a first limiting groove (176) and a second limiting groove (177) in sequence. Both the first limiting groove (176) and the second limiting groove (177) are ring-shaped.

8. A current meter with leakage current indication function according to claim 1, characterized in that, The connection terminal (11) and the prompt line terminal (16) are each provided with two elastic contact pieces, and the two ends of the contact pieces are arc-shaped and tilted upward or downward.

Images