Detection protection device of power line and electric connection equipment

Abstract

The utility model discloses a power line detection protection device and an electric connection device, the detection protection device comprises a housing assembly, a test button, a power supply insertion sheet, a circuit board and a support frame, the housing assembly comprises a first housing and a second housing; the test button is arranged on the first shell; the second shell is provided with a plurality of insertion piece holes, and one end of each power supply insertion piece extends into the shell assembly from the corresponding insertion piece hole; the circuit board is arranged in the shell assembly and comprises a first board face facing the first shell and a second board face facing the second shell, a first touch point and a second touch point are printed on the first board face, and when the test button is pressed down, the first touch point is electrically connected with the second touch point; the supporting frame is located between the circuit board and the second shell, the power line comprises a current-carrying wire, the supporting frame is provided with a current-carrying conductor and a tripping switch, and the current-carrying conductor is connected with the current-carrying wire in a welded mode; interference on the detection protection circuit can be reduced, and the touch reliability of the test button can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a detection and protection device for a power line and an electrical connection device. Background Art

[0002] A leakage circuit detector interrupter (LCDI) is a power connection device for electrical appliances. It detects leakage current in the power cord through a leakage current detection line and, when a certain leakage current is detected, disconnects the appliance from the power supply, ensuring safe use. In recent years, leakage current detection circuit breakers have not only required leakage current detection through the leakage current detection line, but also have introduced higher safety detection requirements, such as the need to detect whether the leakage current detection line is open.

[0003] At present, as the demand for safety testing of power line detection and protection devices becomes increasingly higher, the number of components in the circuit modules included in the detection and protection devices is also increasing. Therefore, the structural design of the detection and protection devices is also facing more and more challenges. For example, the large working current supplied to the load interferes with the detection and protection circuit, and the test button is unreliable when touched. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a detection and protection device for a power line and an electrical connection device, which can reduce interference to the detection and protection circuit and improve the touch reliability of the test button.

[0005] In a first aspect, an embodiment of the present invention provides a detection and protection device for a power cord, comprising a housing assembly, a test button, a power plug, a circuit board, and a support frame, wherein:

[0006] The housing assembly includes a first housing and a second housing, and the power line extends from the connection between the first housing and the second housing to the interior of the housing assembly;

[0007] The test button is provided on the first housing;

[0008] The second shell is provided with a plurality of plug holes, and one end of the power plug extends from the plug hole into the interior of the shell assembly;

[0009] The circuit board is disposed inside the housing assembly and electrically connected to the power cord. The circuit board includes a first surface facing the first housing and a second surface facing the second housing. A detection and protection circuit is printed on the first surface. The detection and protection circuit includes a first touch point and a second touch point. When the test button is pressed, the first touch point is electrically connected to the second touch point.

[0010] The support frame is located between the circuit board and the second shell and is fixed on the second board surface. The power cord includes a current-carrying line. The support frame is provided with a current-carrying conductor and a trip switch. The current-carrying conductor is welded to the current-carrying line. The trip switch is used to control the power connection between the current-carrying conductor and the power plug.

[0011] The power line detection and protection device provided by the embodiment of the present invention has at least the following beneficial effects: when the detection and protection device is powered on and supplies power to the load through the power line, the power connection between the power plug and the current-carrying conductor is conducted, and the large working current flows from the power plug to the current-carrying conductor and then to the current-carrying wire of the power line. Inside the detection and protection device, the power plug and the current-carrying conductor are both located on the side close to the second shell, and the detection and protection circuit on the circuit board is printed on the first board surface facing the first shell, that is, the detection and protection circuit is printed on the board surface of the circuit board away from the large working current, and the second board surface of the circuit board is also provided with a support frame, which further increases the distance between the large working current and the detection and protection circuit, greatly reducing the interference of the large working current on the detection and protection circuit; the test button is provided on the first shell, and the first board surface of the circuit board on which the detection and protection circuit is printed faces the first shell, so that the test button and the detection and protection circuit are arranged opposite each other. The stroke required to achieve electrical connection between the first touch point and the second touch point in the detection and protection circuit by pressing the test button can also be set to be shorter, which helps to improve the touch reliability of the test button.

[0012] According to the detection and protection device provided in some embodiments of the present invention, a reset button is further provided on the first shell, the reset button is adjacent to the test button, a first through hole corresponding to the reset button is provided on the circuit board, one end of the reset button passes through the first through hole and abuts against the trip switch, and when the reset button is pressed, the trip switch conducts the power connection between the current-carrying conductor and the power plug.

[0013] According to the detection protection device provided by some embodiments of the present invention, a raised enclosure surrounding the test button and the reset button is provided on the first shell, and the height of the raised enclosure is greater than or equal to the height of the test button and the reset button.

[0014] According to the detection protection device provided by some embodiments of the present invention, the detection protection circuit includes a light emitting diode, a second through hole corresponding to the light emitting diode is provided on the first shell, and a light guide column is provided on the second through hole.

[0015] According to the detection protection device provided by some embodiments of the present invention, a first through-hole pad for welding the current-carrying conductor is provided on the circuit board, and a third through-hole corresponding to the first through-hole pad is further provided on the support frame.

[0016] According to the detection and protection device provided in some embodiments of the present invention, the support frame is also provided with a trip coil for generating electromagnetic force to drive the trip switch to disconnect the power connection, and the circuit board is provided with a second through-hole pad for welding the trip coil.

[0017] According to some embodiments of the present invention, the detection and protection device provided further includes a first varistor for absorbing surge voltage, and the support frame is provided with a first mounting portion for mounting the first varistor, and the first mounting portion is provided with a first mounting hole and a second mounting hole for respectively passing two pins of the first varistor through, and an isolation portion for increasing the creepage distance is provided between the first mounting hole and the second mounting hole.

[0018] According to the detection protection device provided by some embodiments of the present invention, the isolation portion includes a first stopper close to the first mounting hole and a second stopper close to the second mounting hole.

[0019] According to the detection protection device provided in some embodiments of the present invention, a concave area is formed between the first stopper and the second stopper.

[0020] According to the detection protection device provided in some embodiments of the present invention, the support frame is made of insulating material, and the first stopper and the second stopper are integrally formed on the support frame.

[0021] In a second aspect, an embodiment of the present invention provides an electrical connection device, comprising the detection and protection device as described in the embodiment of the first aspect above and a power line connected to the detection and protection device, wherein the detection and protection device supplies power to an electrical load through the power line.

[0022] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0025] Figure 1 This is a schematic diagram of the overall structure of the power line detection and protection device provided by an embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the overall structure of the power line detection and protection device provided by an embodiment of the utility model from another angle;

[0027] Figure 3 This is a structural diagram of a circuit board and a support frame of a power line detection and protection device provided by an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the layout of the detection and protection circuit printed on the first board surface of the circuit board in the detection and protection device for the power line provided by an embodiment of the utility model;

[0029] Figure 5 This is a structural diagram of a circuit board and a support frame of a power line detection and protection device provided by another embodiment of the present utility model;

[0030] Figure 6 This is a circuit schematic diagram of the power line, self-test current injection module, and manual detection module of the power line detection and protection device provided by an embodiment of the utility model;

[0031] Figure 7 This is a circuit diagram of a fault response module of a power line detection and protection device provided by an embodiment of the present utility model;

[0032] Figure 8 This is a circuit schematic diagram of a trigger module and other components of a power line detection and protection device provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0033] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0034] In the description of the embodiments of the present invention, "several" means one or more, "more" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, and "above," "below," and "within" are understood to include the number itself. "At least one" means one or more, "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. If "first," "second," or the like is used in the description, it is only for the purpose of distinguishing technical features and is not to be understood as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0035] It should be noted that the terms "set," "install," and "connect" in the embodiments of the present invention should be interpreted broadly. Those skilled in the art can reasonably determine the specific meanings of these terms in the embodiments of the present invention based on the specific content of the technical solution. For example, the term "connect" can refer to mechanical connection, electrical connection, or communication; it can refer to direct connection or indirect connection through an intermediary.

[0036] It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] A leakage circuit detector interrupter (LCDI) is a power connection device for electrical appliances that can detect leakage current in a power cord group through a leakage current detection line and cut off the power connection of the appliance when a certain leakage current is detected, ensuring safe use. In recent years, in addition to detecting the leakage current of the power cord through the leakage current detection line, leakage current detection circuit breakers have also put forward higher safety detection requirements, such as the need to detect whether the leakage current detection line is open-circuited. Currently, as the safety detection requirements for power cord detection and protection devices are increasing, the number of components in the circuit modules included in the detection and protection devices is also increasing. Therefore, the structural design of the detection and protection devices is also facing more and more challenges, such as the interference of the large working current supplied to the load on the detection and protection circuit, and the unreliable touch of the test button.

[0038] Based on this, the embodiments of the present invention provide a detection and protection device for a power line and an electrical connection device, which can reduce interference to the detection and protection circuit and improve the touch reliability of the test button.

[0039] The following is a further description of the embodiments of the present invention with reference to the accompanying drawings.

[0040] Figure 1 This is a schematic diagram of the overall structure of the power line detection and protection device provided by an embodiment of the utility model; Figure 2 This is a schematic diagram of the overall structure of the power line detection and protection device provided by an embodiment of the utility model from another angle; Figure 3 This is a structural diagram of a circuit board and a support frame of a power line detection and protection device provided by an embodiment of the present utility model; Figure 4 This is a schematic diagram of the layout of the detection and protection circuit printed on the first board surface of the circuit board in the detection and protection device for the power line provided by the embodiment of the utility model. Figures 1 to 4 The first embodiment of the present invention provides a detection and protection device for a power cord 100, including a housing assembly 200, a test button 211, a power plug 221, a circuit board 300, and a support frame 400, wherein:

[0041] like Figure 1 and Figure 2 As shown, the housing assembly 200 includes a first housing 210 and a second housing 220 , and the power cord 100 extends from the connection between the first housing 210 and the second housing 220 to the interior of the housing assembly 200 ;

[0042] Reference Figure 1 , the test button 211 is provided on the first housing 210;

[0043] Reference Figure 2 The second housing 220 is provided with a plurality of plug holes, and one end of the power plug 221 extends from the plug hole to the interior of the housing assembly 200; specifically, three power plugs 221 can be provided, corresponding to the live wire, the neutral wire, and the ground wire respectively;

[0044] The circuit board 300 is disposed inside the housing assembly 200 and is electrically connected to the power cord 100. The circuit board 300 includes a first board surface 310 facing the first housing 210 and a second board surface 320 facing the second housing 220. A detection protection circuit is printed on the first board surface 310. Figure 4 As shown, the detection protection circuit includes a first touch point 311 and a second touch point 312. When the test button 211 is pressed, the first touch point 311 is electrically connected to the second touch point 312.

[0045] The support frame 400 is located between the circuit board 300 and the second housing 220 and is fixed on the second board surface 320. Figure 3 As shown;

[0046] The power line 100 includes a current-carrying line, for example, a first current-carrying line as a live line and a second current-carrying line as a neutral line. The support frame 400 is provided with a current-carrying conductor 500 and a trip switch 600. The current-carrying conductor 500 is welded to the current-carrying line, as shown in FIG. Figure 3As shown, two current-carrying conductors 500 can be provided, wherein one current-carrying conductor 500 is welded to a first current-carrying wire as a live wire, and the other current-carrying conductor 500 is welded to a second current-carrying wire as a neutral wire, and the trip switch 600 is used to control the power connection between the current-carrying conductor 500 and the power plug 221.

[0047] According to the detection and protection device of the power cord 100 provided in the embodiment of the present invention, when the detection and protection device is powered on and supplies power to the load through the power cord 100, the power connection between the power plug 221 and the current-carrying conductor 500 is turned on, and the large working current flows from the power plug 221 to the current-carrying conductor 500, and then flows to the current-carrying line of the power cord 100. Inside the detection and protection device, the power plug 221 and the current-carrying conductor 500 are both located on the side close to the second shell 220, and the detection and protection circuit on the circuit board 300 is printed on the first board surface 310 facing the first shell 210, that is, the detection and protection circuit is printed on the board surface of the circuit board 300 away from the large working current. , and the second board surface 320 of the circuit board 300 is also provided with a support frame 400, which further increases the distance between the working large current and the detection protection circuit, greatly reducing the interference of the working large current on the detection protection circuit; the test button 211 is set on the first shell 210, and the first board surface 310 of the circuit board 300 printed with the detection protection circuit faces the first shell 210, so that the test button 211 and the detection protection circuit are arranged opposite to each other. The stroke required for pressing the test button 211 to achieve electrical connection between the first touch point 311 and the second touch point 312 in the detection protection circuit can also be set to be shorter, which helps to improve the touch reliability of the test button 211.

[0048] Reference Figure 1 In the detection protection device provided in some embodiments of the present invention, a reset button 212 is further provided on the first housing 210, and the reset button 212 is adjacent to the test button 211, and Figure 4 A first through hole 301 corresponding to the reset button 212 is provided on the circuit board 300. One end of the reset button 212 passes through the first through hole 301 and abuts against the trip switch 600. When the reset button 212 is pressed, the trip switch 600 conducts the power connection between the current-carrying conductor 500 and the power plug 221.

[0049] In this embodiment, the reset button 212 and the test button 211 on the first shell 210 are arranged in adjacent positions, which can facilitate the simultaneous assembly of the reset button 212 and the test button 211 during the production of the detection and protection device, thereby improving production efficiency. In addition, the reset button 212 and the test button 211 can also be arranged as an integrated button assembly, thereby reducing the number of components and assembly complexity of the detection and protection device; a first through hole 301 for the reset button 212 to pass through is provided on the circuit board 300, so that the reset button 212 can directly push the trip switch 600.

[0050] Reference Figure 1 In the detection protection device provided in some embodiments of the present invention, a raised enclosure 213 surrounding the test button 211 and the reset button 212 is provided on the first shell 210, and the height of the raised enclosure 213 is greater than or equal to the height of the test button 211 and the reset button 212.

[0051] In this embodiment, a raised barrier 213 is provided. When an object is accidentally thrown onto the first shell 210 of the detection and protection device, the possibility of the test button 211 and the reset button 212 being accidentally touched, causing the detection and protection device to be accidentally powered on or off, can be effectively reduced, thereby greatly improving the safety of the detection and protection device.

[0052] Reference Figure 4 In the detection protection device provided in some embodiments of the present invention, the detection protection circuit includes a light emitting diode LED1, and a reference Figure 1 The first shell 210 is provided with a second through hole 214 corresponding to the light emitting diode LED1 , and a light guide column is provided on the second through hole 214 .

[0053] In this embodiment, when the light emitting diode LED1 on the circuit board 300 is powered on, the light emitted is transmitted from the second through hole 214 through the light guide column so that the user can see it intuitively.

[0054] Reference Figure 4 In the detection and protection device provided in some embodiments of the present invention, a first through-hole pad 302 and a first through-hole pad 303 for soldering the current-carrying conductor 500 are provided on the circuit board 300, and a third through-hole corresponding to the first through-hole pad 302 and the first through-hole pad 303 is also provided on the support frame 400.

[0055] Since the detection protection circuit on the circuit board 300 needs to be electrically connected to the current-carrying conductor 500 to form a loop, a soldering pad for soldering the current-carrying conductor 500 needs to be provided on the circuit board 300, and since the detection protection circuit is printed on the first board surface 310 of the circuit board 300 away from the support frame 400, rather than printed on the second board surface 320 where the circuit board 300 is connected to the support frame 400, a through-hole soldering pad needs to be provided on the circuit board 300. Accordingly, the support frame 400 is also provided with a third through-hole, so that a portion of the current-carrying conductor 500 can first pass through the third through-hole on the support frame 400, and then pass through the through-hole soldering pad on the circuit board 300, thereby realizing the electrical connection between the current-carrying conductor 500 and the detection protection circuit.

[0056] Reference Figure 3 In the detection and protection device provided in some embodiments of the present invention, the support frame 400 is further provided with a tripping coil Lx for generating electromagnetic force to drive the tripping switch 600 to disconnect the power connection, and Figure 4 The circuit board 300 is provided with a second through hole pad 304 and a second through hole pad 305 for soldering the trip coil Lx.

[0057] Similarly, in this embodiment, since the detection and protection circuit is printed on the first board surface 310 of the circuit board 300 away from the support frame 400, rather than being arranged on the second board surface 320 where the circuit board 300 is connected to the support frame 400, a second through-hole pad 304 and a second through-hole pad 305 need to be provided on the circuit board 300 so that the two pins of the tripping coil Lx can pass through the through-hole pads on the circuit board 300, thereby realizing electrical connection between the tripping coil Lx and the detection and protection circuit.

[0058] Reference Figure 5 In some embodiments of the present invention, the detection and protection device further includes a first varistor ZR1 for absorbing surge voltage. A first mounting portion 410 for mounting the first varistor ZR1 is provided on the support frame 400. The first mounting portion 410 is provided with a first mounting hole 411 and a second mounting hole 412, respectively, for the two pins of the first varistor ZR1 to pass through. An isolation portion 413 is provided between the first mounting hole 411 and the second mounting hole 412 to increase the creepage distance. The circuit board 300 is provided with a third through-hole pad 306 and a third through-hole pad 307, respectively, for soldering the two pins of the first varistor ZR1. When the support frame 400 is mounted on the circuit board 300, the first mounting hole 411 corresponds to the third through-hole pad 306, and the second mounting hole 412 corresponds to the third through-hole pad 307.

[0059] In this embodiment, by setting the position of the first mounting hole 411 on the support frame 400 to correspond to the position of the third through-hole pad 306 on the circuit board 300, and setting the position of the second mounting hole 412 on the support frame 400 to correspond to the position of the third through-hole pad 307 on the circuit board 300, it is possible to achieve that after the support frame 400 is fixed to the circuit board 300, the two pins of the first varistor ZR1 are directly aligned with the third through-hole pad 306 and the third through-hole pad 307 respectively, so that the pin welding of the first varistor ZR1 can be conveniently achieved, and under the auxiliary positioning effect of the support frame 400, the first varistor ZR1 is not easy to shift during the welding process, which is beneficial to improving the reliability and efficiency of the pin welding of the first varistor ZR1.

[0060] Reference Figure 5 In the detection protection device provided in some embodiments of the present invention, the isolation portion 413 includes a first stopper 4131 close to the first mounting hole 411 and a second stopper 4132 close to the second mounting hole 412 .

[0061] In this embodiment, two blocks are respectively provided to form an isolation portion 413, so that the creepage distance between the first mounting hole 411 and the second mounting hole 412 needs to bypass the first block 4131 and the second block 4132 respectively, thereby greatly improving the creepage distance between the two pins of the first varistor ZR1 and improving the safety of the circuit board.

[0062] Reference Figure 5 In the detection protection device provided in some embodiments of the present invention, the first stopper 4131 and the second stopper 4132 extend in a direction away from the circuit board 300, that is, toward Figure 2 The angles shown extend in the height direction.

[0063] In this embodiment, the first stop 4131 and the second stop 4132 both extend in a direction away from the circuit board 300, that is, the first stop 4131 and the second stop 4132 have a certain height, which avoids the inability to effectively achieve isolation between the two pins of the first varistor ZR1 when the exposed conductive metal is too long, thereby improving the isolation reliability of the isolation part 413.

[0064] Reference Figure 5 In the detection and protection device provided in some embodiments of the present invention, a concave area 414 is formed between the first stopper 4131 and the second stopper 4132 .

[0065] In this embodiment, the presence of the concave area 414 requires the creepage distance between the first mounting hole 411 and the second mounting hole 412 to bypass the surface of the concave area 414, thereby effectively increasing the creepage distance and improving the safety of the circuit board.

[0066] Reference Figure 5 In the varistor mounting structure provided in some embodiments of the present invention, the first stopper 4131 is arc-shaped and is arranged around the edge of the first mounting hole 411 close to the second mounting hole 412; the second stopper 4132 is arc-shaped and is arranged around the edge of the second mounting hole 412 close to the first mounting hole 411.

[0067] In this embodiment, the first stopper 4131 and the second stopper 4132 are both arc-shaped and are respectively arranged around the edges of the first mounting hole 411 and the second mounting hole 412 , which can effectively isolate the first mounting hole 411 from the second mounting hole 412 .

[0068] Reference Figure 5 In the detection and protection device provided in some embodiments of the present invention, the support frame 400 is made of insulating material, and the first stopper 4131 and the second stopper 4132 are integrally formed on the support frame 400.

[0069] In this embodiment, the first stop block 4131 and the second stop block 4132 are integrally formed on the support frame 400. Compared with a structure in which they are formed separately and then assembled together, the rigidity of the first stop block 4131 and the second stop block 4132 can be improved, thereby preventing the first stop block 4131 and the second stop block 4132 from being easily deformed and falling off due to being squeezed by the pins of the first varistor ZR1 for a long time, thereby causing hidden dangers.

[0070] Reference Figures 6 to 8 The power line 100 includes a first current-carrying line 110, a second current-carrying line 120, a first shielding conductor structure 130 covering the first current-carrying line 110, and a second shielding conductor structure 140 covering the second current-carrying line 120. The first shielding conductor structure 130 is used to collect the leakage signal of the first current-carrying line 110, and the second shielding conductor structure 140 is used to collect the leakage signal of the second current-carrying line 120. The first shielding conductor structure 130 includes a first end a close to the input end of the power line 100 and a second end b close to the output end of the power line 100. The second shielding conductor structure 140 includes a third end c close to the input end of the power line 100 and a fourth end d close to the output end of the power line 100. The second end b and the fourth end d are connected.

[0071] The detection and protection circuit in the detection and protection device includes a self-detection current injection module 330, a manual detection module 340, a fault response module 350 and a trigger module 360; the self-detection current injection module 330 is used to inject a self-detection current into the second shielded conductor structure 140; the manual detection module 340 is used to inject a simulated leakage current into the first shielded conductor structure 130; the fault response module 350 is used to output a tripping trigger signal when any one of the following is obtained: a leakage signal detected by the first shielded conductor structure 130, a leakage signal detected by the second shielded conductor structure 140, an open circuit signal generated when the first shielded conductor structure 130 or the second shielded conductor structure 140 is open circuited, or the simulated leakage current injected by the manual detection module 340; the trigger module 360 ​​is used to disconnect the power connection between the input end and the output end of the power cord 100 according to the received tripping trigger signal;

[0072] Reference Figure 4 The circuit board 300 is further provided with a fourth through-hole pad 308 for soldering the first shielding conductor structure 130 and a fourth through-hole pad 309 for soldering the second shielding conductor structure 140;

[0073] Continue to refer to Figures 6 to 8The manual detection module 340 includes a test switch TEST and a first resistor R1, one end of the test switch TEST is connected to the first current-carrying line 110, the other end of the test switch TEST is connected to one end of the first resistor R1, and the other end of the first resistor R1 is connected to the first end a of the first shielding conductor structure 130; the self-test current injection module 330 includes a second resistor R2, one end of the second resistor R2 is connected to the first current-carrying line 110, and the other end of the second resistor R2 is connected to the third end c of the second shielding conductor structure 140; the detection protection device also includes a first and a second The positive electrode of the first diode D1 is connected to the trigger module 360, and the negative electrode of the first diode D1 is connected to the first current-carrying line 110; the detection and protection device also includes a third resistor R3, one end of the third resistor R3 is connected to the first end a of the first shielding conductor structure 130, and the other end of the third resistor R3 is connected to the fault response module 350 and the trigger module 360; the fault response module 350 includes a fourth resistor R4, a first capacitor C1 and a voltage regulator ZD1, one end of the fourth resistor R4, one end of the first capacitor C1 and one end of the voltage regulator ZD1 are connected to The other end of the fourth resistor R4 is connected to the third end c of the second shielded conductor structure 140, and the other end of the first capacitor C1 and the other end of the voltage regulator ZD1 are both connected to the trigger module 360; the trigger module 360 ​​includes a fifth resistor R5, a second capacitor C2 and a thyristor Q1, one end of the fifth resistor R5, one end of the second capacitor C2 and the cathode of the thyristor Q1 are all connected to the anode of the first diode D1, the other end of the fifth resistor R5, the other end of the second capacitor C2 and the control pin of the thyristor Q1 are connected together and connected to the fault response module 350; trip One end of the coil Lx is connected to the second current-carrying line 120, and the other end of the trip coil Lx is connected to the anode of the thyristor Q1; it also includes a second varistor ZR2 and a second diode D2, and the second varistor ZR2 and the second diode D2 are both connected in parallel with the thyristor Q1; it also includes an indication module, which includes a sixth resistor R6 and a light-emitting diode LED1, one end of the sixth resistor R6 is connected to the trip coil Lx, the other end of the sixth resistor R6 is connected to the anode of the light-emitting diode LED1, and the cathode of the light-emitting diode LED1 is connected to the anode of the first diode D1. The positions of the various components of the detection protection circuit on the circuit board 300 are shown in FIG. Figure 4 shown.

[0074] In a second aspect, an embodiment of the present invention provides an electrical connection device, comprising a detection and protection device as described above in the first aspect and a power line 100 connected to the detection and protection device, wherein the detection and protection device supplies power to an electrical load through the power line 100.

[0075] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on computer-readable media, which can include computer storage media or non-transitory media and communication media or transient media. As is well known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVDs) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0076] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A detection and protection device for a power line, characterized in that: include: The housing assembly includes a first housing and a second housing, wherein the power line extends from the connection between the first housing and the second housing to the interior of the housing assembly; A test button is provided on the first housing; A power plug, wherein the second housing is provided with a plurality of plug holes, and one end of the power plug extends from the plug hole into the interior of the housing assembly; a circuit board disposed within the housing assembly and electrically connected to the power cord, the circuit board including a first surface facing the first housing and a second surface facing the second housing, the first surface having a detection and protection circuit printed thereon, the detection and protection circuit including a first touch point and a second touch point, wherein when the test button is pressed, the first touch point is electrically connected to the second touch point; The support frame is located between the circuit board and the second shell and is fixed to the second board surface. The power cord includes a current-carrying line. The support frame is provided with a current-carrying conductor and a trip switch. The current-carrying conductor is welded to the current-carrying line. The trip switch is used to control the power connection between the current-carrying conductor and the power plug.

2. The detection and protection device according to claim 1, characterized in that: A reset button is further provided on the first shell, and the reset button is adjacent to the test button. A first through hole corresponding to the reset button is provided on the circuit board. One end of the reset button passes through the first through hole and abuts against the trip switch. When the reset button is pressed, the trip switch conducts the power connection between the current-carrying conductor and the power plug.

3. The detection and protection device according to claim 2, characterized in that: The first shell is provided with a raised enclosure surrounding the test button and the reset button, and the height of the raised enclosure is greater than or equal to the height of the test button and the reset button.

4. The detection and protection device according to claim 1, characterized in that: The detection protection circuit includes a light emitting diode. The first housing is provided with a second through hole corresponding to the light emitting diode. The second through hole is provided with a light guide column.

5. The detection and protection device according to claim 1, characterized in that: The circuit board is provided with a first through-hole pad for welding the current-carrying conductor, and the support frame is further provided with a third through-hole corresponding to the first through-hole pad.

6. The detection and protection device according to claim 1, characterized in that: The support frame is further provided with a trip coil for generating electromagnetic force to drive the trip switch to disconnect the power connection, and the circuit board is provided with a second through-hole pad for welding the trip coil.

7. The detection and protection device according to claim 1, characterized in that: It also includes a first varistor for absorbing surge voltage, and the support frame is provided with a first mounting portion for mounting the first varistor, the first mounting portion is provided with a first mounting hole and a second mounting hole for two pins of the first varistor to pass through respectively, and an isolation portion for increasing the creepage distance is provided between the first mounting hole and the second mounting hole.

8. The detection and protection device according to claim 7, characterized in that: The isolation portion includes a first stopper close to the first mounting hole and a second stopper close to the second mounting hole.

9. The detection and protection device according to claim 8, characterized in that: A concave area is formed between the first stopper and the second stopper.

10. The detection and protection device according to claim 8, characterized in that: The support frame is made of insulating material, and the first stopper and the second stopper are integrally formed on the support frame.

11. An electrical connection device, characterized in that: The invention comprises the detection and protection device according to any one of claims 1 to 10 and a power line connected to the detection and protection device, wherein the detection and protection device supplies power to an electrical load through the power line.

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