Measuring switch with overload protection structure

Abstract

The invention relates to the technical field of measuring switches, and discloses a measuring switch with an overload protection structure, which comprises a body, wiring ports are arranged at two ends of the body, a knob switch is arranged on one side of the body, and a conductive mechanism, a circuit board and a measuring module are mounted in the body. A data processing module, a control module and a communication module are integrated on the circuit board, the conductive mechanism is electrically connected with the circuit board, the measuring module is in communication connection with the circuit board, and the measuring module is used for monitoring the current intensity of the wire outlet end and feeding data back to the circuit board through the communication module. The front blocking piece is arranged in the power transmission module, the lower end of the front blocking piece is bent towards one side of the rear blocking piece to form the first bent part, and the distance between the front blocking piece and the rear blocking piece is shortened through the first bent part, so that when a circuit is short-circuited, the distance between the two blocking pieces is relatively closer, and the phase voltage difference between the two blocking pieces is smaller; and the generated electric arc is relatively weak, and the efficiency of cooling and eliminating the electric arc through the metal grating is higher.

Description

Technical Field

[0001] This invention relates to the field of measurement switch technology, specifically a measurement switch with an overload protection structure. Background Technology

[0002] A measurement switch is a low-voltage switchgear equipped with a high-precision current sensor and measurement unit. It is used to realize the normal connection and disconnection or overload and short circuit protection functions of power distribution lines, and can realize local or remote data interaction. It can monitor node voltage, current and power, and perform segmented lean processing. It is an important underlying node component for realizing smart grids. The measurement switch includes the switch body and the measurement module that replaces the instrument.

[0003] The measuring switch has an arc-extinguishing chamber inside, with metal baffles on both sides. During a short circuit, a high voltage difference is generated between the two metal baffles. When the voltage difference is large, an electric arc is generated. In the prior art, a metal grid is usually used to divide the electric arc into multiple small segments for arc extinguishing. The strength of the electric arc is usually determined by the current and the distance between the two conductors. The existing measuring switch cannot weaken the electric arc when the current is constant. Moreover, the generation of the electric arc will also generate a surge current in the conductor, which will damage the electrical appliance. Summary of the Invention

[0004] The purpose of this invention is to provide a measuring switch with an overload protection structure to solve the problems mentioned in the background art, such as the inability to weaken electric arcs and the damage to electrical appliances caused by surge currents.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A measuring switch with an overload protection structure includes a body, with wiring ports at both ends and a rotary switch on one side. The body contains a conductive mechanism, a circuit board, and a measuring module. The circuit board integrates a data processing module, a control module, and a communication module. The conductive mechanism is electrically connected to the circuit board, and the measuring module is communicatively connected to the circuit board. The measuring module monitors the current intensity at the output terminal and feeds the data back to the circuit board via the communication module. The circuit board analyzes and processes the data using its own data processing module and controls the operation of the conductive mechanism based on the processing results.

[0006] As a further aspect of the present invention: the main body includes two detachable outer shells, which are interlocked to form an independent shell structure. The conductive mechanism is installed in the cavity inside the shell. An arc-extinguishing chamber is provided on one side inside the shell. A coil chamber is provided on the side inside the shell corresponding to the arc-extinguishing chamber. A power supply chamber is provided below the arc-extinguishing chamber inside the shell. A trigger chamber is provided on the side inside the shell corresponding to the coil chamber and the power supply chamber.

[0007] As a further embodiment of the present invention: the conductive mechanism includes a conductive body and a wire clamp. The conductive body includes a power supply module, an access module, and a trigger module. The access module is used to access a power source, and the power supply module is used to access an electrical appliance. The access module and the power supply module are connected to form a power-conducting circuit. The trigger module is located on one side of the access module and the power supply module, and the three work together to switch the circuit on and off.

[0008] As a further embodiment of the present invention: the wire clamp includes a bolt, a crescent buckle and a rectangular clamp, the rectangular clamp is fixed inside the wiring port, the crescent buckle has a U-shaped structure, one side of which is inserted into the rectangular clamp and the other side is located outside the rectangular clamp, one end of the bolt is threaded through one side wall of the crescent buckle and one side wall of the rectangular clamp and extends into the rectangular clamp and is located on one side of the side of the crescent buckle.

[0009] As a further embodiment of the present invention: the trigger module includes a trigger switch, and an opening is provided on the inner wall of the housing corresponding to one side of the trigger switch. The trigger switch is rotatably connected to the opening. A rectangular pull rod is rotatably connected to one side of the trigger switch. A transmission crank is rotatably connected to the end of the rectangular pull rod away from the trigger switch. An abutment block is fixed to the end of the transmission crank away from the rectangular pull rod. A third connecting member is provided on one side of the transmission crank. The third connecting member is rotatably connected to one side of the transmission crank. The abutment block abuts against the rear side of the third connecting member. One end of the third connecting member is bent downwards and forms a shape. The third connector forms a contact part. The other end of the third connector is connected to a second spring. The end of the second spring away from the third connector is movably connected to a rotating shaft. A first connector is provided on the side of the transmission crank away from the third connector. The transmission crank is rotatably connected to one side of the first connector. One end of the first connector extends forward and forms a locking part. A second connector is provided on one side of the first connector. One end of the rotating shaft on the second spring is rotatably connected to the second connector, and the second connector is rotatably connected to one side of the first connector. One end of the second connector extends to one side and forms a trigger part.

[0010] As a further embodiment of the present invention: the power supply module includes a metal grid, a front baffle, an elastic sheet, and a power supply conductor. The power supply conductor is located inside the output end of the wiring port. The metal grid is made of multiple sheet-like metals stacked together, with gaps between adjacent metal sheets. The lower end of the front baffle bends towards the coil chamber to form a first bend. The end of the first bend bends in the opposite direction to form a second bend. One end of the power supply conductor is fixedly connected to the end of the second bend. The elastic sheet is fixed between the power supply conductor and the second bend. The elastic sheet is made of two metal sheets with different coefficients of thermal expansion stacked together. A fan is installed inside the outer casing below the side corresponding to the elastic sheet.

[0011] As a further embodiment of the present invention: the access module includes a rear baffle, the lower end of the rear baffle is bent to one side to form a horizontal connecting part, a connecting piece is fixed to the bottom of the horizontal connecting part, a contact is fixed to one end of the connecting piece, a magnetic post is provided above the horizontal connecting part, a slide rod is fixed to the bottom of the magnetic post, one end of the slide rod slides through the horizontal connecting part and the connecting piece, and a ball head is fixed to the bottom end of the slide rod, a first spring is sleeved on the outside of the slide rod, one end of the first spring is connected to the magnetic post, and the other end is fixed to the horizontal connecting part.

[0012] As a further embodiment of the present invention: a sliding cylinder is slidably sleeved on the outside of the magnetic column, the upper end of the magnetic column extends above the sliding cylinder, an electromagnetic shielding cylinder is fixed inside the sliding cylinder, the electromagnetic shielding cylinder is sleeved on the outside of the first spring, a first coil and a second coil are sleeved on the outside of the sliding cylinder above the horizontal connecting part, the first coil and the second coil are stacked together, one end of the second coil is connected to the circuit board through a wire, a limiting bracket is fixed on one side above the horizontal connecting part, the limiting bracket is disposed on one side of the magnetic column, the limiting bracket has an arc-shaped slot, one end of the magnetic column is slidably limited in the slot.

[0013] As a further embodiment of the present invention: an access guide and a current receiving guide are provided above the first coil, the access guide and the current receiving guide are fixedly connected, one end of the access guide is inserted into the wiring port, one end of the first coil is connected to the current receiving guide through a wire and the other end is connected to the rear baffle through a wire.

[0014] As a further embodiment of the present invention: the measurement module includes a measurement body and multiple Hall elements. The multiple Hall elements are connected to the measurement body through wires. The multiple Hall elements are respectively sealed and fixed in the corresponding output terminals for monitoring the changes in the magnetic field strength of the output terminal current.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, a front baffle is provided in the power transmission module. The lower end of the front baffle is bent toward the rear baffle to form a first bending part. The front baffle shortens the distance between it and the rear baffle through the first bending part. When a short circuit occurs in the line, the distance between the two baffles is relatively closer, the phase voltage difference between them is smaller, and the generated arc will be relatively weaker. The arc will be more efficiently extinguished by cooling through the metal grid. Furthermore, the end of the first bend bends inward to form a second bend, which is directly connected to the power supply conductor. The power supply conductor is connected to the electrical appliance. In the event of a short circuit, a surge current will be generated at the front baffle. After the surge current passes through the second bend, the flow path will increase, and the current will decrease accordingly as the flow distance increases. As a result, the current flowing into the electrical appliance will also decrease, thus protecting the electrical appliance from damage caused by the surge current. Furthermore, by connecting a measurement module to the power supply end, the measurement module can detect minute changes in current. Compared to breaking the circuit by mechanically bending the elastic sheet after it is heated, the measurement module can control the circuit on and off more precisely. Furthermore, a fan is installed on one side of the elastic sheet. When the elastic sheet is heated and the circuit is broken, the fan is powered on and dissipates heat from the elastic sheet, thus preventing the elastic sheet from overheating and causing a fire. Furthermore, two superimposed coils are set in the access module. One coil is used for normal power supply, while when a slight change in current is detected, the other coil can be energized. The magnetic field generated by the energized coil is used to control the connection and disconnection of the line, making the connection and disconnection more precise. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a structural separation diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the measurement module in this invention.

[0020] Figure 4 This is a schematic diagram of the structure of the outer shell after it has been unfolded in this invention.

[0021] Figure 5This is a schematic diagram of the conductive mechanism in this invention.

[0022] Figure 6 This is a schematic diagram of the wire clamp in a conductive mechanism.

[0023] Figure 7 This is a structural separation diagram of the conductive body in a conductive mechanism.

[0024] Figure 8 This is a structural separation diagram of the trigger module in the conductive body.

[0025] Figure 9 This is a structural separation diagram of the power transmission module in the conductive body.

[0026] Figure 10 This is a structural separation diagram of the connected module in the conductive body.

[0027] Figure 11 This is a schematic diagram of the structure of the two coils in the access module after they have been unfolded.

[0028] Reference numerals in the attached drawings: 1-Body, 11-Outer shell, 12-Arc extinguishing chamber, 13-Power supply chamber, 14-Coil chamber, 15-Trigger chamber, 2-Wiring port, 3-Rotary switch, 4-Conductive mechanism, 41-Conductive main body, 411-Power supply module, 4111-Metal grille, 4112-Front baffle, 4113-First bend, 4114-Second bend, 4115-Power supply conductor, 4116-Elastic sheet, 4117-Fan, 4118-Mounting bracket, 412-Connection module, 4121-Rear baffle, 4122-Horizontal connection, 4123-Connecting piece, 4124-Contact, 4125-Limit bracket, 4126-Connection conductor, 4127-Power connection conductor. 4128-First coil, 4129-Second coil, 41210-Magnetic column, 41211-Slide rod, 41212-First spring, 41213-Ball head, 41214-Electromagnetic shielding cylinder, 41215-Slide cylinder, 413-Trigger module, 4131-Trigger switch, 4132-Rectangular pull rod, 4133-Transmission crank, 4134-Abutting block, 4135-First connector, 4136-Second connector, 4137-Third connector, 4138-Abutting part, 4139-Second spring, 42-Wire clamp, 421-Bolt, 422-Half-moon buckle, 423-Rectangular clamp, 5-Circuit board, 6-Measurement module, 61-Measurement body, 62-Hall element. Detailed Implementation

[0029] The following embodiments will describe the present invention in detail with reference to the accompanying drawings. In the drawings or description, similar or identical parts are referred to by the same reference numerals, and in practical applications, the shape, thickness, or height of each component may be enlarged or reduced. The embodiments listed in this invention are merely illustrative and not intended to limit the scope of the invention. Any obvious modifications or changes made to this invention do not depart from the spirit and scope of the invention.

[0030] Please see Figures 1-2 In this embodiment of the invention, a measuring switch with an overload protection structure includes a body 1. Both ends of the body 1 are provided with wiring ports 2, wherein the upper port is the inlet port and the lower port is the outlet port. A rotary switch 3 is provided on one side of the body 1, which powers on or off the body 1 by toggling the rotary switch 3. The body 1 internally houses a conductive mechanism 4, a circuit board 5, and a measuring module 6. The circuit board 5 integrates a data processing module, a control module, and a communication module. The conductive mechanism 4 is electrically connected to the circuit board 5, and the measuring module 6 is communicatively connected to the circuit board 5. The measuring module 6 monitors the current intensity at the outlet port and feeds the data back to the circuit board 5 via the communication module. The circuit board 5 analyzes and processes the data through its own data processing module and controls the operation of the conductive mechanism 4 based on the processing results. Controlling the operation of the conductive mechanism 4 is achieved through the control module. In this embodiment, both the circuit board 5 and the measuring module 6 are existing technologies, and existing devices and technologies can be used.

[0031] Please see Figure 3 The measurement module 6 includes a measurement body 61 and multiple Hall elements 62. The multiple Hall elements 62 are all connected to the measurement body 61 through wires. The multiple Hall elements 62 are sealed and fixed in their respective output terminals to monitor the changes in the magnetic field strength of the current at the output terminals. Hall elements are existing electrical components that can detect the magnetic field strength near the current with high detection accuracy. They are usually used in measuring switches, low-voltage protectors and other equipment. The measurement body 61 is communicatively connected to the circuit board 5. The Hall elements 62 feed back the magnetic field changes caused by the weak current detected to the circuit board 5 through the measurement body 61. The circuit board 5 analyzes and processes the data and decides whether to disconnect the circuit.

[0032] Please see Figure 4 The main body 1 includes two detachable outer shells 11, which are interlocked to form an independent shell structure. A conductive mechanism 4 is installed in the cavity inside the shell. An arc-extinguishing chamber 12 is provided on one side inside the shell 11. A coil chamber 14 is provided on the side inside the shell 11 corresponding to the arc-extinguishing chamber 12. A power supply chamber 13 is provided below the arc-extinguishing chamber 12 inside the shell 11. A trigger chamber 15 is provided on the side inside the shell 11 corresponding to the coil chamber 14 and the power supply chamber 13. The components of the conductive mechanism 4 are respectively installed in the arc-extinguishing chamber 12, the power supply chamber 13, the coil chamber 14, and the trigger chamber 15.

[0033] Please see Figures 5-7 The conductive mechanism 4 includes a conductive body 41 and a wire clamp 42. Two wire clamps 42 are provided, located at the input end and output end of the conductive body 41 respectively. The wire clamp 42 includes a bolt 421, a crescent buckle 422 and a rectangular clamp 423. The rectangular clamp 423 is fixed inside the wiring port 2. The crescent buckle 422 has a U-shaped structure, with one side inserted into the rectangular clamp 423 and the other side located outside the rectangular clamp 423. One end of the bolt 421 is threaded through one side wall of the crescent buckle 422 and one side wall of the rectangular clamp 423 and extends into the rectangular clamp 423 and is located on one side of the crescent buckle 422. When wiring, the wire end is inserted into the gap between the rectangular clamp 423 and the crescent buckle 422, and then the bolt 421 is tightened so that one side of the crescent buckle 422 abuts against the wire end to fix the wire end. The conductive body 41 includes a power supply module 411, an access module 412, and a trigger module 413. The power supply module 411 is installed in the arc extinguishing chamber 12 and the power supply chamber 13, the access module 412 is installed in the coil chamber 14, and the trigger module 413 is installed in the trigger chamber 15.

[0034] Please see Figure 8 The trigger module 413 includes a trigger switch 4131. An opening is provided on the inner wall of the housing 11 corresponding to one side of the trigger switch 4131. The trigger switch 4131 is rotatably connected in the opening. A rectangular pull rod 4132 is rotatably connected to one side of the trigger switch 4131. A transmission crank 4133 is rotatably connected to the end of the rectangular pull rod 4132 away from the trigger switch 4131. An abutment block 4134 is fixed to the end of the transmission crank 4133 away from the rectangular pull rod 4132. A third connector 4137 is provided on one side of the transmission crank 4133. The third connector 4137 is rotatably connected to one side of the transmission crank 4133. An abutment block 4134 abuts against the rear side of the third connector 4137. One end of the third connector 4137 is bent downward to form an abutment part 4138. The other end of the third connector 4137 is connected to a second spring 4139. The end of the second spring 4139 away from the third connector 4137 is movably connected to a rotating shaft. A first connector 4135 is provided on the side of the transmission crank 4133 away from the third connector 4137. The transmission crank 4133 is rotatably connected to one side of the first connector 4135. One end of the first connector 4135 extends forward and forms a locking part. A second connector 4136 is provided on one side of the first connector 4135. One end of the shaft on the second spring 4139 is rotatably connected to the second connector 4136, and the second connector 4136 is rotatably connected to one side of the first connector 4135. One end of the second connector 4136 extends to one side and forms a trigger part. In this embodiment, when the trigger switch 4131 is rotated upward, the rectangular pull rod 4132 can drive the transmission crank 4133 to rotate around the connection point, and the abutment block 4134 at one end of the transmission crank 4133 will simultaneously tilt upward. The abutment block 4134 abuts against the rear side of the third connector 4137. When the abutment block 4134 moves upward, the front end of the third connector 4137 will tilt upward around the connection point. When the trigger switch 4131 is rotated downward, the abutment block 4134 will move downward and no longer press against the third connector 4137. The third connector 4137 will return to its original position downward under the pull of the second spring 4139.

[0035] Please see Figure 9 The power supply module 411 includes a metal grille 4111, a front baffle 4112, an elastic sheet 4116, and a power supply conductor 4115. The power supply conductor 4115 is located inside the outgoing end of the wiring port 2. The metal grille 4111 is made of multiple sheet metals stacked together, with gaps between two adjacent metal sheets. The front baffle 4112 is fixed on one side of the inner wall of the arc-extinguishing chamber 12. The metal grille 4111 is fixed in the arc-extinguishing chamber 12 by the mounting bracket 4118 and is located on one side of the front baffle 4112. The lower end of the front baffle 4112 bends toward the side near the coil chamber 14 to form a first bent portion 4113. The end of the first bent portion 4113 bends in the opposite direction to form a second bent portion 4114. One end of the power supply plate 4115 is fixedly connected to the end of the second bent portion 4114. An elastic plate 4116 is fixed between the power supply plate 4115 and the second bent portion 4114. The elastic plate 4116 is made of two metal plates with different coefficients of thermal expansion. When the elastic plate 4116 is heated, it will bend. When the elastic plate 4116 is not heated, it will curl upward and press against the bottom of the contact portion 4138. A fan 4117 is installed inside the housing 11 on the side corresponding to the elastic plate 4116. A through hole is opened on the inner wall of the bottom of the housing 11 on the side corresponding to the fan 4117. The fan 4117 is used to quickly dissipate heat from the overheated elastic plate 4116 to avoid fire hazards. In this embodiment, the lower end of the front baffle 4112 is bent inward to form the first bending part 4113. The purpose of this design is to shorten the distance between the power supply end and the coil chamber 14. When a short circuit occurs in the line, the current in the line will increase by tens to hundreds of times instantly. At this time, the elastic sheet 4116 has been released and is no longer connected to the access module 412. Under strong current, the front baffle 4112 will generate an extremely high phase voltage with the access module 412. The farther the distance between the two, the greater the phase difference and the larger the arc generated. By shortening the distance between the two through the first bend 4113, the phase difference can be reduced, thereby weakening the electric arc. The electric arc is cooled and extinguished by the metal grid 4111. At the same time, the front baffle 4112 and the power supply conductor 4115 are connected through the second bend 4114. The second bend 4114 increases the distance required for current movement. When a short circuit generates an electric arc, a surge current will also be generated in the front baffle 4112. Part of this current is transferred upward to the metal grid 4111 and extinguished in the form of an electric arc. The other part flows into the power supply conductor 4115 after the path is increased through the second bend 4114. The surge current is consumed by increasing the path through the second bend 4114, thus protecting the circuit at the power consumption end.

[0036] Please see Figures 10-11 The access module 412 includes a rear baffle 4121, which is fixed to one side inside the coil chamber 14 and is arranged opposite to the front baffle 4112. A metal grille 4111 is arranged between the two. The lower end of the rear baffle 4121 is bent to one side to form a horizontal connecting part 4122. A connecting piece 4123 is fixed at the bottom of the horizontal connecting part 4122. A contact 4124 is fixed at one end of the connecting piece 4123. When the power is normally applied, one end of the elastic piece 4116 abuts against the contact 4124 to form a passage. A magnetic post 41210 is provided above the horizontal connecting part 4112. A sliding rod 41211 is fixed at the bottom of the magnetic post 41210. One end of the sliding rod 41211 slides through the horizontal connecting part 4112 and the connecting piece 4123 and is located above the elastic piece 4116. A ball head 41213 is fixed at the bottom of the sliding rod 41211. A first spring 41212 is sleeved on the outside of the sliding rod 41211. One end of the first spring 41212 is connected to the magnetic post 41210, and the other end is fixed on the horizontal connecting part 4112. A sliding cylinder 41215 is slidably sleeved on the outside of the magnetic post 41210. The upper end of the magnetic post 41210 extends to the top of the sliding cylinder 41215. An electromagnetic shielding cylinder 41214 is fixed inside the sliding cylinder 41215. The electromagnetic shielding cylinder 41214 is sleeved on the outside of the first spring 41212 to protect the spring from electromagnetic heating. A first coil 4128 and a second coil 4129 are sleeved on the outside of the slide cylinder 41215 above the horizontal connecting part 4112. The first coil 4128 and the second coil 4129 are stacked together. The second coil 4129 is located in the loop of the first coil 4128. One end of the second coil 4129 is connected to the circuit board 5 through a wire and the other end is connected to the fan 4117 through a wire. The circuit board 5 can supply power to the second coil 4129. A limit bracket 4125 is fixed on one side above the horizontal connecting part 4112. The limit bracket 4125 is set on one side of the magnetic column 41210. An arc-shaped slot is opened on the limit bracket 4125. One end of the magnetic column 41210 is slidably limited in the slot. Above the first coil 4128, there is an access guide plate 4126 and a current receiving guide plate 4127, which are fixedly connected. One end of the access guide plate 4126 is inserted into the inlet terminal of the wiring port 2. One end of the first coil 4128 is connected to the current receiving guide plate 4127 through a wire, and the other end is connected to the rear baffle 4121 through a wire. The rear baffle 4121, the connecting piece 4123, and the contact 4124 are all made of conductive material. The external power supply is connected through the access guide plate 4126 and the current receiving guide plate 4127. The conductive sheet 4127 flows into the first coil 4128, which generates a magnetic field that attracts the magnetic post 41210. Under normal current, the attraction is insufficient to overcome the elastic force of the first spring 41212, and the magnetic post 41210 cannot move down. When there is a short circuit, the current increases and the attraction also increases. The magnetic post 41210 will move down and drive the slide bar 41211 to slide down. When the slide bar 41211 slides down, it will squeeze the elastic sheet 4116. The elastic sheet 4116 separates from the contact 4124 and is no longer energized, and the circuit is broken.

[0037] Working principle: When the measuring switch is energized, the elastic sheet 4116 abuts against the contact 4124 to form a circuit. At the same time, the elastic sheet 4116 also abuts against the contact part 4138 of the trigger module 413, so that the trigger switch 4131 is in the open state (i.e., the switch is facing upward). The external power supply flows into the first coil 4128 through the connecting plate 4126 and the connecting plate 4127. The current in the first coil 4128 flows into the elastic sheet 4116 through the back baffle 4121, the connecting plate 4123 and the contact 4124. The current in the elastic sheet 4116 flows into the power supply plate 4115. The electrical appliance is connected to the power supply plate 4115 to provide power. When a short circuit occurs in the circuit, the current in the circuit will increase by tens to hundreds of times instantaneously. At this time, when the strong current flows into the first coil 4128, it will generate a strong magnetic field. The strong magnetic field attracts the magnetic column 41210 to slide downward, which drives the slide bar 41211 to slide down synchronously and squeeze the elastic sheet 4116. The elastic sheet 4116 separates from the contact 4124 and no longer forms a circuit. The circuit is broken. Furthermore, since the elastic sheet 4116 bounces down and no longer abuts against the contact part 4138 of the trigger module 413, the trigger module 413 will reset downward under the action of the second spring 4139. The trigger switch 4131 will then be in the closed state (i.e., the switch is facing down). When the load at the power end of the line is too large (usually two to ten times the rated current), the current flowing into the elastic sheet 4116 will also increase. When the current increases, the elastic sheet 4116 will overheat and bend downward. At this time, the elastic sheet 4116 will also separate from the contact 4124, the line will be disconnected and the switch will face downward. When the load at the power consumption end of the circuit increases but is far less than two to ten times the rated current, the measurement module 6 detects the current magnetic field strength at the power consumption end and feeds the data back to the circuit board 5. The circuit board 5 analyzes and processes the data and decides whether to disconnect the circuit based on the preset upper limit value. When the circuit needs to be disconnected, since the current in the circuit itself does not change much, the magnetic field generated by the first coil 4128 is insufficient to attract the magnetic post 41210. At this time, power can be supplied to the second coil 4129 through the circuit board 5. The current direction of the second coil 4129 is the same as that of the first coil 4128, and the magnetic fields generated by the two coils are in the same direction. The two coils generate magnetic fields at the same time, and the two magnetic fields superimpose each other. At this time, the attraction to the magnetic post 41210 is enhanced, and the magnetic post 41210 can slide downward. When the magnetic post 41210 slides downward, the slide bar 41211 will squeeze the elastic sheet 4116, thereby disconnecting the circuit and providing more precise protection for the circuit.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A measuring switch with an overload protection structure, comprising a body (1), wherein both ends of the body (1) are provided with wiring ports (2), and a rotary switch (3) is provided on one side of the body (1), characterized in that, The main body (1) is equipped with a conductive mechanism (4), a circuit board (5) and a measurement module (6). The circuit board (5) integrates a data processing module, a control module and a communication module. The conductive mechanism (4) is electrically connected to the circuit board (5). The measurement module (6) is communicatively connected to the circuit board (5). The measurement module (6) is used to monitor the current intensity at the output end and feeds the data back to the circuit board (5) through the communication module. The circuit board (5) analyzes and processes the data through its own data processing module and controls the operation of the conductive mechanism (4) according to the processing result.

2. The measuring switch with overload protection structure according to claim 1, characterized in that, The main body (1) includes two detachable outer shells (11), which are fastened together to form an independent shell structure. The conductive mechanism (4) is installed in the cavity inside the shell. An arc-extinguishing chamber (12) is provided on one side inside the shell (11). A coil chamber (14) is provided on the side inside the shell (11) corresponding to the arc-extinguishing chamber (12). A power supply chamber (13) is provided inside the shell (11) below the arc-extinguishing chamber (12). A trigger chamber (15) is provided inside the shell (11) on the side corresponding to the coil chamber (14) and the power supply chamber (13).

3. The measuring switch with overload protection structure according to claim 2, characterized in that, The conductive mechanism (4) includes a conductive body (41) and a wire clamp (42). The conductive body (41) includes a power supply module (411), an access module (412), and a trigger module (413). The access module (412) is used to access a power source, and the power supply module (411) is used to access an electrical appliance. The access module (412) and the power supply module (411) are connected to form a power-on circuit. The trigger module (413) is located on one side of the access module (412) and the power supply module (411), and the three work together to switch the circuit on and off.

4. The measuring switch with overload protection structure according to claim 3, characterized in that, The wire clamp (42) includes a bolt (421), a crescent buckle (422), and a rectangular clamp (423). The rectangular clamp (423) is fixed inside the wiring port (2). The crescent buckle (422) has a U-shaped structure, with one side inserted into the rectangular clamp (423) and the other side located outside the rectangular clamp (423). One end of the bolt (421) is threaded through one side wall of the crescent buckle (422) and one side wall of the rectangular clamp (423) and extends into the rectangular clamp (423) and is located on one side of the side of the crescent buckle (422).

5. The measuring switch with overload protection structure according to claim 3, characterized in that, The trigger module (413) includes a trigger switch (4131). An opening is provided on the inner wall of the outer casing (11) corresponding to the trigger switch (4131). The trigger switch (4131) is rotatably connected to the opening. A rectangular pull rod (4132) is rotatably connected to one side of the trigger switch (4131). A transmission crank (4133) is rotatably connected to the end of the rectangular pull rod (4132) away from the trigger switch (4131). An abutment block (4134) is fixed to the end of the transmission crank (4133) away from the rectangular pull rod (4132). A third connector (4137) is provided on one side of the transmission crank (4133). The third connector (4137) is rotatably connected to one side of the transmission crank (4133). The abutment block (4134) abuts against the rear side of the third connector (4137). One end of the third connector (4137) is bent downwards to form an abutment. The contact part (4138) is connected to a second spring (4139) at the other end of the third connector (4137). The second spring (4139) is movably connected to a rotating shaft at the end away from the third connector (4137). A first connector (4135) is provided on the side of the transmission crank (4133) away from the third connector (4137). The transmission crank (4133) is rotatably connected to one side of the first connector (4135). One end of the first connector (4135) extends forward and forms a locking part. A second connector (4136) is provided on one side of the first connector (4135). One end of the rotating shaft on the second spring (4139) is rotatably connected to the second connector (4136), and the second connector (4136) is rotatably connected to one side of the first connector (4135). One end of the second connector (4136) extends to one side and forms a trigger part.

6. The measuring switch with overload protection structure according to claim 3, characterized in that, The power supply module (411) includes a metal grille (4111), a front baffle (4112), an elastic sheet (4116), and a power supply conductor (4115). The power supply conductor (4115) is located inside the output end of the wiring port (2). The metal grille (4111) is made of multiple sheet metals stacked together, with gaps between adjacent metal sheets. The lower end of the front baffle (4112) bends towards the coil chamber (14) to form a first bend (4113). The end of 4113) is bent in the opposite direction to form a second bent portion (4114). One end of the power supply plate (4115) is fixedly connected to the end of the second bent portion (4114). The elastic plate (4116) is fixed between the power supply plate (4115) and the second bent portion (4114). The elastic plate (4116) is made of two metal plates with different coefficients of thermal expansion. A fan (4117) is installed inside the outer shell (11) on the side corresponding to the elastic plate (4116).

7. The measuring switch with overload protection structure according to claim 3, characterized in that, The access module (412) includes a rear baffle (4121), the lower end of which is bent to one side to form a horizontal connecting part (4122). A connecting piece (4123) is fixed to the bottom of the horizontal connecting part (4122), and a contact (4124) is fixed to one end of the connecting piece (4123). A magnetic post (41210) is provided above the horizontal connecting part (4112), and a sliding contact is fixed to the bottom of the magnetic post (41210). The rod (41211) has one end that slides through the horizontal connecting part (4112) and the connecting piece (4123), and the bottom end of the sliding rod (41211) is fixed with a ball head (41213). A first spring (41212) is sleeved on the outside of the sliding rod (41211). One end of the first spring (41212) is connected to the magnetic post (41210), and the other end is fixed on the horizontal connecting part (4112).

8. The measuring switch with overload protection structure according to claim 7, characterized in that, A sliding cylinder (41215) is slidably sleeved on the outside of the magnetic column (41210). The upper end of the magnetic column (41210) extends above the sliding cylinder (41215). An electromagnetic shielding cylinder (41214) is fixed inside the sliding cylinder (41215). The electromagnetic shielding cylinder (41214) is sleeved on the outside of the first spring (41212). A first coil (4128) and a second coil (412) are sleeved on the outside of the sliding cylinder (41215) above the horizontal connecting part (4112). 9), the first coil (4128) and the second coil (4129) are stacked together. One end of the second coil (4129) is connected to the circuit board (5) through a wire. A limiting bracket (4125) is fixed on one side above the horizontal connecting part (4112). The limiting bracket (4125) is set on one side of the magnetic column (41210). An arc-shaped slot is opened on the limiting bracket (4125). One end of the magnetic column (41210) is slidably limited in the slot.

9. The measuring switch with overload protection structure according to claim 8, characterized in that, A guide plate (4126) and a connecting plate (4127) are provided above the first coil (4128). The guide plate (4126) and the connecting plate (4127) are fixedly connected. One end of the guide plate (4126) is inserted into the wiring port (2). One end of the first coil (4128) is connected to the connecting plate (4127) through a wire, and the other end is connected to the rear baffle (4121) through a wire.

10. The measuring switch with overload protection structure according to claim 1, characterized in that, The measurement module (6) includes a measurement body (61) and multiple Hall elements (62). The multiple Hall elements (62) are connected to the measurement body (61) through wires. The multiple Hall elements (62) are respectively sealed and fixed in the corresponding output terminal to monitor the change of the magnetic field strength of the current at the output terminal.

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