CN110086056B

CN110086056B - Conversion plug

Info

Publication number: CN110086056B
Application number: CN201910501425.3A
Authority: CN
Inventors: 王培军; 黄秒; 张建博
Original assignee: Zhejiang Xiyu Intelligent Technology Co ltd
Current assignee: Zhejiang Xiyu Intelligent Technology Co ltd
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2024-01-30
Anticipated expiration: 2039-06-11
Also published as: CN110086056A

Abstract

The invention discloses a conversion plug, which comprises a plug, a socket, a power transmission line, a control circuit board and a shell, wherein the socket, the power transmission line and the control circuit board are all positioned in the shell, the plug is arranged on one side of the socket, the socket is arranged on the other side of the shell, the control circuit board is arranged above the plug, the plug is connected with the socket through the power transmission line, the conversion plug also comprises a first isolation part arranged between the plug and the control circuit board, a plurality of first support parts are dispersedly fixed on the top edge of the first isolation part, and the top ends of the first support parts are fixed on the top of the shell; the control circuit board comprises a first circuit board and a second circuit board, wherein the first circuit board is fixed on the first isolation component, and the second circuit board is fixed on the top of the shell. The conversion plug is compact in size, attractive in appearance, good in user experience and has the functions of arc detection, overcurrent protection, lightning protection and the like.

Description

Conversion plug

Technical Field

The invention relates to a conversion plug, in particular to a conversion plug with arc detection and lightning protection performances.

Background

The socket is mainly used for the tail end of a power transmission line, the front end of electric equipment is used as an intermediary for connecting the power transmission line and the electric equipment, the connection and disconnection between the electric equipment and the power transmission line are realized through the connection and disconnection between the internal line and the copper piece, and based on the socket, the socket plays an important role in the power supply line.

Along with the continuous improvement of the living standard of people, household appliances are also diversified and developed, the requirement of the diversity of loads on power input is higher and higher, the long-term high-load work is also a larger test on a power transmission line, in particular to old communities, which are irregular in wire routing and serious in aging, and old community fire-fighting facilities are behind and wooden devices are more, under the complex environment, once overcurrent, fault arc or lightning stroke occurs in the wires, the power supply is unstable, the damage of electric equipment is caused, the fire is caused, and life and property safety of residents are threatened. Aiming at the situation, socket manufacturers start to research a conversion plug with a protection function, and plug the conversion plug on a socket on a wall to enable electric equipment to be powered by the conversion plug, but at present, the existing conversion plug has the following defects:

1) The protection circuit has the advantages that the protection circuit only has a lightning protection function or an overcurrent protection function, the protection function is single, a fault circuit cannot be detected, the safety problem caused by fault arc is difficult to avoid, and the protection performance is not strong;

2) The size is large, and when the portable electronic device is used for civil applications, the portable electronic device is inconvenient for users to carry, is attractive, and has poor user experience.

However, the overcurrent protection, lightning protection and fault arc detection functions are added in the conversion plug at the same time, as the contacts on the circuit board are increased, and part of circuits are strong circuits, in order to prevent air from being broken down, the safety distance between the circuit board and the shell is required to be kept, part of electric appliance components are required to be increased, and therefore the integral volume of the conversion plug is inevitably increased, and the portability is poor. Based on the above, the volume and the function of the conversion socket are simultaneously considered, and the conversion socket has higher difficulty under the prior art.

Disclosure of Invention

In order to solve the above technical problem, a first object of the present invention is to: provided is a conversion plug which has an arc detection function and which is beautiful and compact in appearance.

The second object of the present invention is to: the switching plug has the functions of arc detection, overcurrent detection and lightning protection, and is attractive and compact in appearance.

In view of the above, the present invention provides a conversion plug, comprising a plug unit, a socket unit, a power transmission wire, a control circuit board and a housing, wherein the socket unit, the power transmission wire and the control circuit board are all located in the housing, the plug unit is disposed at the lower side of the housing, the socket unit is disposed at the upper side of the housing,

the conversion plug also comprises a first isolation part arranged between the plug unit and the control circuit board, wherein the first isolation part is fixed in the shell, the plug unit comprises a plurality of pins, one ends of the pins are positioned outside the shell, the other ends of the pins extend into the shell and are propped against one side of the first isolation part to be fixed, the other side of the first isolation part is fixed with the control circuit board, and the pins are connected with the socket unit and/or the control circuit board through transmission wires;

the socket unit is fixed in the shell, and a second isolation part is arranged at the bottom of the socket unit and used for isolating the live wire from the control circuit board;

the control circuit board is provided with a main control circuit, an arc detection circuit, a reset circuit and an alarm circuit which are connected with the main control circuit, the control circuit board comprises a first circuit board and a second circuit board, the first circuit board is fixed on the first isolation component, and the second circuit board is fixed on the inner top of the shell; the arc detection circuit comprises a first coil sleeved on the live wire.

Preferably, the first isolation part is fixed in the shell through a first support part and a second support part, the first support part is fixedly connected with the top of the shell or integrally formed with the top of the shell, and the second support part is arranged between the first isolation part and the bottom of the shell and used for supporting the first isolation part, so that a gap between the bottom of the shell and the first isolation part can be used for a transmission wire to pass through;

the screw hole is formed in the bottom of the first supporting component, the first mounting hole is formed in the position, corresponding to the first supporting component, of the first isolating component, the second mounting hole is formed in the position, corresponding to the first mounting hole, of the bottom of the shell, the first supporting component, the first mounting hole and the second mounting hole are connected through bolts, and therefore the first supporting component, the first isolating component and the bottom of the shell are fixed.

Preferably, a third supporting component is further arranged between the first isolation component and the first circuit board, and the third supporting component is used for supporting the first circuit board, so that a gap for accommodating the bottom plug-in of the first circuit board is reserved between the first circuit board and the first isolation component.

Preferably, the bottom of the first isolation component is provided with first guide plates for separating the live wire from the zero line and the ground wire in the power transmission wire along two sides of the ground wire respectively, and first limit parts are arranged on the outer sides of the first guide plates, so that the live wire or the zero line is close to one side of the adjacent first guide plates.

Preferably, the housing comprises an upper housing and a lower housing, one side of the top of the upper housing corresponding to the socket unit is of a planar structure, and the planar structure is provided with jacks corresponding to the socket unit in position; one side of the top of the upper shell, corresponding to the plug unit, is inclined downwards to form a smooth gentle slope structure, so that the stress at the plug unit is concentrated in the process of inserting the plug unit into an external power supply.

Preferably, the upper shell is provided with a pressing part which is integrally formed with the upper shell and is concave inwards, the second circuit board is provided with a reset key, the pressing part is located above the reset key, when the pressing part is extruded, the main control circuit is reset, the alarm circuit comprises an alarm indicator lamp, and the alarm indicator lamp is embedded in the upper shell.

Preferably, the first circuit board is also provided with a power circuit and a lightning protection circuit; the second circuit board is also provided with an overcurrent detection circuit, the power supply circuit and the overcurrent detection circuit are connected with the main control circuit, the overcurrent detection circuit comprises a second coil, and the second coil is sleeved on the fire wire and is stacked with the first coil.

Preferably, the edge of the first isolation component is further provided with a plurality of elastic buckles in a scattered manner, and the first circuit board is fixed on the first isolation component through the elastic buckles.

Preferably, the bottom of the shell is provided with a second limiting piece, and the second limiting piece is arranged on two sides of the fire wire and extends to the lower end of the second coil, so that the fire wire sequentially penetrates through the second coil and the first coil.

Preferably, a plurality of clamping grooves for fixing the pins are formed in the bottom of the first isolation component.

Compared with the prior art, the invention has the beneficial effects that:

the invention has the functions of arc detection, overcurrent detection and lightning protection, has compact appearance, good safety performance, attractive appearance, portability and better user experience, and does not increase the volume of the conversion socket.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not limit the application.

FIG. 1 is a perspective view of a conversion plug according to an embodiment of the present invention;

FIG. 2 (a) is a schematic diagram showing an internal structure of a switching plug according to an embodiment of the present invention;

FIG. 2 (b) is a schematic diagram showing an internal structure of a switching plug according to an embodiment of the present invention;

FIG. 2 (c) is a schematic diagram showing another internal structure of the switching plug according to the embodiment of the present invention;

FIG. 3 (a) is a top view of a first spacer member in an embodiment of the present invention;

FIG. 3 (b) is a perspective view of a first spacer member according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a socket according to an embodiment of the present invention;

FIG. 5 is a schematic view showing the internal structure of the upper housing in the embodiment of the present invention;

FIG. 6 is a top view of the lower housing in an embodiment of the invention;

FIG. 7 is a schematic circuit diagram of an electronic control section in an embodiment of the invention;

FIG. 8 is a schematic circuit diagram of a master circuit in an embodiment of the invention;

FIG. 9 is a schematic circuit diagram of an arc sampling circuit in an embodiment of the invention;

FIG. 10 is a schematic circuit diagram of a current sampling circuit in an embodiment of the invention;

FIG. 11 is a schematic circuit diagram of a power circuit in an embodiment of the invention;

FIG. 12 (a) is a schematic circuit diagram of a reset circuit in accordance with an embodiment of the present invention;

FIG. 12 (b) is a schematic circuit diagram of another reset circuit in an embodiment of the invention;

FIG. 13 is a schematic circuit diagram of a buzzer alarm circuit in an embodiment of the present invention;

FIG. 14 is a schematic circuit diagram of a light alarm circuit in an embodiment of the invention;

fig. 15 is a schematic circuit diagram of a zero-crossing sampling circuit in an embodiment of the invention.

1, a shell; 2. a plug unit; 3. a socket unit; 4. a pressing part; 5. a firing line; 6. a zero line; 7. a ground wire;

11. a gentle slope-like structure; 12. a planar structure; 13. a second limiting piece; 14. a first support member; 15. a second support member; 16. a second mounting hole;

141. screw holes;

31. a jack; 32. a second isolation member; 33. a third limiting member; 34. copper sheets;

81. a first isolation member; 82. a first circuit board; 83. a second circuit board; 84. a second coil; 85. a first coil;

811. a third support member; 812. a first guide plate; 813. an elastic buckle; 814. a first mounting hole; 815. a first limiting member; 816. a clamping groove; 817. a profiled support structure; 818. a second guide plate;

831. a first indicator light; 832. a reset key; 833. a third indicator light; 834. and (3) a spring.

Detailed Description

The invention will be further described with reference to the drawings and examples.

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

Furthermore, in the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The technical contents of the present invention are explained in detail as follows.

As shown in fig. 1, a conversion plug includes a plug unit 2, a socket unit 3, a power transmission wire, a control circuit board and a housing 1, as shown in fig. 2 (a) and 2 (b), the socket unit 3, the power transmission wire and the control circuit board are all located in the housing 1, the plug unit 2 is disposed at the lower side of the housing 1, the socket unit 3 is disposed at the upper side of the housing 1,

the conversion plug further comprises a first isolation part 81 arranged between the plug unit 2 and the control circuit board, the first isolation part 81 is fixed in the shell 1, the plug unit 2 comprises a plurality of pins, one ends of the pins are positioned outside the shell 1, the other ends of the pins extend into the shell 1 and are propped against one side of the first isolation part 81 to be fixed, the other side of the first isolation part 81 is fixed with the control circuit board, and the pins are connected with the socket unit 3 and/or the control circuit board through power transmission wires;

as shown in fig. 2 (a) and fig. 4, the socket unit 3 is fixed in the housing 1, and a second isolating member 32 is disposed at the bottom of the socket unit 3, and the second isolating member 32 is used for isolating the live wire 5 from the control circuit board;

the control circuit board is provided with a main control circuit, an arc detection circuit, a reset circuit and an alarm circuit which are connected with the main control circuit, the control circuit board comprises a first circuit board 82 and a second circuit board 83, the first circuit board 82 is fixed on the first isolation part 81, and the second circuit board 83 is fixed on the inner top of the shell 1; the arc detection circuit comprises a first coil 85 sleeved on the live wire 5.

As a preferred embodiment, as shown in fig. 2 (a), 2 (b) and 4, the first isolation member 81 is fixed in the housing 1 by a first support member 14 and a second support member 15, the first support member 14 is fixedly connected with the top of the housing 1 or integrally formed with the top of the housing, and the second support member 15 is disposed between the first isolation member 81 and the bottom of the housing 1, so as to support the first isolation member 81, so that a gap between the bottom of the housing 1 and the first isolation member 81 can be used for a transmission wire to pass through; preferably, the second supporting member 15 may be integrally formed with or fixedly connected to the first isolating member 81, or may be integrally formed with or fixedly connected to the bottom of the housing 1.

As shown in fig. 5, the bottom of the first supporting member 14 is provided with a screw hole 141, the first isolating member 81 is provided with a first mounting hole 814 corresponding to the position of the first supporting member 14, the bottom of the housing 1 is provided with a second mounting hole 16 corresponding to the position of the first mounting hole 814, and the first supporting member 14, the first mounting hole 814 and the second mounting hole 16 are connected by bolts, thereby fixing the first supporting member 14, the first isolating member 81 and the bottom of the housing 1; preferably, as shown in fig. 6, the second support member 15 is a convex structure provided on the bottom of the housing 1 and recessed into the housing, and the second mounting hole 16 is provided on the second support member 15.

As a preferred embodiment, as shown in fig. 3 (b), a third supporting member 811 is further disposed between the first isolating member 81 and the first circuit board 82, and the third supporting member 811 is used for supporting the first circuit board 82, so that a space for accommodating a bottom card of the first circuit board 82 is left between the first circuit board 82 and the first isolating member 81; preferably, to enhance the overall strength of the first isolation member 81, as shown in fig. 3 (b), a special-shaped support structure 817 is further provided on the first isolation member 81.

As a preferred embodiment, as shown in fig. 3 (a), the bottom of the first isolating component 81 is respectively provided with a first guide plate 812 for separating the live wire 5, the neutral wire 6 and the ground wire 7 in the power transmission wires along two sides of the ground wire 7, a first limiting piece 815 is arranged on the outer side of the first guide plate 812, so that the live wire 5 or the neutral wire 6 approaches to one side of the adjacent first guide plate 812, and the live wire 5 is directly opposite to the lower side of the second coil 84, and the neutral wire 6 is directly opposite to the copper sheet 34 connected with the socket; preferably, the bottom of the first isolating part 81 is further provided with a second guide plate 818, and the second guide plate 818 is disposed at one side of the pin connected to the live wire 5, so that a routing channel is formed between the second guide plate 818 and the pin, and the wire for supplying power to the first circuit board 82 passes through the routing channel.

As a preferred embodiment, the housing 1 includes an upper housing and a lower housing, as shown in fig. 1, a plane structure 12 is disposed on a side of the top of the upper housing corresponding to the socket unit 3, and a jack 31 corresponding to the position of the socket unit 3 is disposed on the plane structure 12; the top of the upper shell is inclined downwards to form a smooth gentle slope structure 11 corresponding to one side of the plug unit 2, so that the stress at the plug unit 2 is concentrated in the process of inserting the plug unit 2 into an external power supply; when the user presses the gentle slope structure 11, since the inclination angle of the gentle slope structure 11 is substantially identical to the angle of the user's force application, a large part of the component of the force applied by the user can be concentrated to the plug unit 2, and therefore, the user can insert the conversion plug into the socket of the power supply with less force than in the conventional similar operation process.

As a preferred embodiment, as shown in fig. 1 and fig. 2 (a), the upper housing is provided with a pressing portion 4 integrally formed with the upper housing and recessed inwards, the second circuit board 83 is provided with a reset key 832, the pressing portion 4 is located above the reset key 832 and is linked with the reset key 832 through an elastic member, when the pressing portion 4 is pressed, the main control circuit is reset, the alarm circuit includes an alarm indicator 831, and the alarm indicator 831 is embedded in the upper housing; preferably, the elastic member is a spring.

As a preferred embodiment, the first circuit board 82 is further provided with a power circuit and a lightning protection circuit, wherein the power circuit is connected with the main control circuit;

as a preferred embodiment, the second circuit board 83 is further provided with an overcurrent detection circuit, and the power supply circuit and the overcurrent detection circuit are both connected with the main control circuit; the overcurrent detection circuit comprises a second coil 84, and the second coil 84 is sleeved on the live wire 5 and is overlapped with the first coil 85;

in the above embodiment, the strong current circuit such as the lightning protection circuit and the power supply circuit is provided on the first circuit board 82, and the weak current circuit such as the main control circuit, the reset circuit, the overcurrent detection circuit, the arc detection circuit and the alarm circuit is provided on the second circuit board 83; here, it is necessary to explain: strong and weak currents are the opposite concept, in this embodiment, it is preferable to use 36V (safety voltage of human body) as the boundary, and more than 36V is strong current and less than 36V is weak current; the purpose of the present embodiment is to divide the control circuit board into the first circuit board 82 and the second circuit board 83 not only to reduce the volume occupied by the control circuit board in the horizontal direction of the conversion socket, but also to place the strong current circuit and the weak current circuit separately in this way, so as to avoid mutual interference between the strong current circuit and the weak current circuit and improve the safety.

As a preferred embodiment, as shown in fig. 2 (a) and 3 (b), the edge of the first isolation member 81 is further provided with a plurality of elastic hooks 813 in a dispersed manner, and the first circuit board 82 is fixed to the first isolation member 81 by the elastic hooks 813.

As a preferred embodiment, the bottom of the housing 1 is provided with second limiting members 13, and the second limiting members 13 are disposed on two sides of the live wire 5 and extend to the lower end of the second coil 84, so that the live wire 5 sequentially penetrates through the second coil 84 and the first coil 85.

As a preferred embodiment, the bottom of the first isolation member 81 is provided with a plurality of slots 816 for fixing pins.

The circuit principle in this embodiment is described in detail as follows:

as shown in fig. 7, the action principle of the electric control part is as follows: referring to fig. 8, a main control chip (microcontroller, preferably model STM32F 303) U4 processes and discriminates the received arc signal P0.4 and zero crossing signal P1.2, if it is determined as arc fault, a high level signal P0.3 and BEEP are sent to an audible and visual alarm circuit, LED1 will flash in red light, and buzzer Q1 sounds long to alarm; the embodiment adopts the 32-bit MCU with low power consumption, enters a low power consumption standby state when the processor does not work, and rapidly enters work when the processor works, so that the power distribution unit realizes lower power consumption and is more environment-friendly, and the main control chip is provided with independent ADC, DAC, comparator and logic floating point operation processing unit functions, and the MCU samples, analyzes and judges fault arc and overcurrent of signals so as to judge whether to send alarm instructions.

As shown in FIG. 11, in the dotted line area, the piezoresistors MY1, MY2, MY3 and the ceramic gas discharge tube G1 form a composite symmetrical lightning protection circuit, and the common mode and the differential mode are fully protected, L, N can be alternatively connected, and no leakage current exists in normal operation, so that lightning stroke can be effectively prevented; the power supply circuit adopts a resistance-capacitance voltage reduction circuit principle, a FUSE tube FUSE1 and a thermistor NTC1 prevent surge current generated in the moment of electrification from damaging a rear-end component, a CBB capacitor C1 limits the maximum working current by using capacitive reactance generated by a capacitor under a certain alternating current signal frequency, a resistor R1 is used for releasing electric quantity stored in the C1 after power failure to prevent electric shock, diodes D1 and D2 are subjected to half-wave rectification, D3 is stabilized to about 5V, L1, C3, C4 and C5 are filtered to obtain stable 5V to supply power to an operational amplifier U2, and then an LDO linear voltage stabilizer U1 is used for obtaining VCC2 to supply power to a microcontroller and the like.

Preferably, the arc detection can adopt a scheme of combining zero-crossing detection and arc detection, wherein zero-crossing sampling obtains a zero-crossing signal through an optocoupler; the electric arc detection converts the sampled current signal into a voltage signal through an electric arc detection coil and a sampling resistor, and then the voltage signal is amplified, filtered and followed to send the signal into an MCU for processing. Specifically, as shown in fig. 9, the arc detection process is: the arc detection first coil 85 collects current change signals, the sampling resistor R9 converts the current signals into voltage signals, the voltage signals are amplified by the operational amplifier U2C, R8 and C11 filters and U2A follow-up, and the signals P0.4 are input into ADC pins PA0 and PA1 of the main control chip U4. As shown in fig. 15, the zero-crossing sampling process is: the optocoupler U3 collects zero crossing signals P1.2 by utilizing the characteristics of the optocoupler U3 and inputs the zero crossing signals P1.2 to a pin PA12 of the main control chip U4. In addition, a specific fault arc detection method can be referred to CN109239560 a-a fault arc detection method, device and storage medium, which are not described herein.

As shown in fig. 10, the current sampling process is: the current transformer collects the current signal in the second coil 84, the sampling resistor R3 converts the current signal into a voltage signal, and the voltage signal is filtered by C2 and C7 to send the signal PA5 to the ADC pin PA5 of the main control chip U4.

The audible and visual alarm circuit adopts an indicator lamp circuit (shown in fig. 14) and a buzzer alarm circuit (shown in fig. 13), wherein in the indicator lamp circuit, a first indicator lamp 831 is a fault arc alarm circuit and is embedded in the shell, and when a fault arc is detected, the first indicator lamp 831 lights up or flashes; as shown in fig. 12 b, the second indicator lamp 833 is a power indicator lamp provided below the pressing member 4 (the pressing member 4 is made of a transparent material), and the second indicator lamp 833 is normally on in the energized state.

Preferably, as shown in fig. 12 (a) and 2 (a), when the reset circuit alarms and discharges the fault, the reset key 832 is pressed by pressing the pressing portion 4 downward, and the whole system is restarted.

In other preferred embodiments, as shown in fig. 12 (b) and 2 (c), the reset key is replaced by a spring 834 provided between the pressing part 4 and the second circuit board 83, and when an alarm occurs and a fault is removed, the human body touches the pressing part 4, thereby forming a capacitance between the human body and the spring 834, and a control chip U4 (preferably TTP233D-HA 6) in the second circuit board 83 senses the capacitance to reset the main control circuit.

The invention has the functions of arc detection, overcurrent protection, lightning protection and the like, has good safety performance, compact and attractive appearance, is convenient to carry and has better user experience.

In addition, it should be noted that:

in the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by those skilled in the art without departing from the spirit and principles of the invention, and any simple modification, equivalent variation and modification of the above embodiments in light of the technical principles of the invention may be made within the scope of the present invention.

Claims

1. The utility model provides a conversion plug, includes plug unit (2), socket unit (3), transmission of electricity wire, control circuit board and casing (1), socket unit (3), transmission of electricity wire and control circuit board all are located in casing (1), plug unit (2) set up in the downside of casing (1), socket unit (3) set up in the upside of casing (1), its characterized in that,

the plug unit (2) comprises a plurality of pins, one ends of the pins are positioned outside the shell (1), the other ends of the pins extend into the shell (1) and are abutted against one side of the first isolation part (81) to be fixed, the other side of the first isolation part (81) is fixed with the control circuit board, and the pins are connected with the socket unit (3) and/or the control circuit board through transmission wires;

the socket unit (3) is fixed in the shell (1), a second isolation part (32) is arranged at the bottom of the socket unit (3), and the second isolation part (32) is used for isolating the live wire (5) from the control circuit board;

the control circuit board is provided with a main control circuit, an arc detection circuit, a reset circuit and an alarm circuit which are connected with the main control circuit, the control circuit board comprises a first circuit board (82) and a second circuit board (83), the first circuit board (82) is fixed on the first isolation part (81), and the second circuit board (83) is fixed on the inner top of the shell (1); the electric arc detection circuit comprises a first coil (85) sleeved on the live wire (5);

the first circuit board (82) is also provided with a power circuit and a lightning protection circuit; the second circuit board (83) is also provided with an overcurrent detection circuit, and the power supply circuit and the overcurrent detection circuit are both connected with the main control circuit; the overcurrent detection circuit comprises a second coil (84), wherein the second coil (84) is sleeved on the live wire (5) and is overlapped with the first coil (85);

the edge of the first isolation part (81) is also provided with a plurality of elastic buckles (813) in a scattered manner, and the first circuit board (82) is fixed on the first isolation part (81) through the elastic buckles (813).

2. A conversion plug according to claim 1, characterized in that the first isolation part (81) is fixed in the housing (1) through a first support part (14) and a second support part (15), and the first support part (14) is fixedly connected with the top of the housing (1) or integrally formed; the second supporting component (15) is arranged between the first isolating component (81) and the bottom of the shell (1) and is used for supporting the first isolating component (81), so that a gap between the bottom of the shell (1) and the first isolating component (81) can be used for a transmission wire to pass through;

the screw hole (141) is formed in the bottom of the first supporting component (14), the first mounting hole (814) is formed in the position, corresponding to the first supporting component (14), of the first isolating component (81), the second mounting hole (16) is formed in the position, corresponding to the first mounting hole (814), of the bottom of the shell (1), the first supporting component (14) is connected with the first mounting hole (814) and the second mounting hole (16) through bolts, and therefore the first supporting component (14), the first isolating component (81) and the bottom of the shell (1) are fixed.

3. A conversion plug according to claim 2, characterized in that a third support member (811) is further arranged between the first spacer member (81) and the first circuit board (82), the third support member (811) being arranged to support the first circuit board (82) such that a space for accommodating a bottom card of the first circuit board (82) is left between the first circuit board (82) and the first spacer member (81).

4. A conversion plug according to claim 1, characterized in that the bottom of the first isolating component (81) is provided with a first guide plate (812) for isolating the live wire (5) from the neutral wire (6) and the ground wire (7) in the power transmission wire along two sides of the ground wire (7), and a first limiting part (815) is arranged outside the first guide plate (812) so that the live wire (5) or the neutral wire (6) is close to one side of the adjacent first guide plate (812).

5. A conversion plug according to claim 1, characterized in that the housing (1) comprises an upper housing and a lower housing, the side of the top of the upper housing corresponding to the socket unit (3) is a planar structure (12), and the planar structure (12) is provided with a jack (31) corresponding to the position of the socket unit (3); one side of the top of the upper shell, corresponding to the plug unit (2), is inclined downwards to form a smooth gentle slope structure (11), so that the stress at the plug unit (2) is concentrated in the process of inserting the plug unit (2) into an external power supply.

6. The conversion plug according to claim 5, wherein the upper housing is provided with a pressing portion (4) integrally formed therewith and recessed inward, the second circuit board (83) is provided with a reset key (832), the pressing portion (4) is located above the reset key (832), when the pressing portion (4) is pressed, the main control circuit is reset, the alarm circuit includes an alarm indicator lamp (831), and the alarm indicator lamp (831) is embedded in the upper housing.

7. A conversion plug according to claim 1, wherein a second limiting member (13) is arranged at the bottom of the housing (1), and the second limiting member (13) is arranged at two sides of the live wire (5) and extends to the lower end of the second coil (84), so that the live wire (5) sequentially penetrates through the second coil (84) and the first coil (85).

8. A conversion plug according to claim 1, characterized in that the bottom of the first spacer member (81) is provided with a plurality of clamping grooves (816) for fixing pins.